The present invention relates to an indicator light device for a vehicle with handlebars. The present invention also relates to a navigation device for a vehicle with handlebars. Background of the Invention

Cyclists often use arm signals to indicate that they are turning left or right. These are poorly visible, if at all, when cycling at night or in situations with low visibility. This makes it difficult and hazardous for cyclists to turn off or into a road, because other road users are not aware of the cyclist's intention. Many cyclists do not indicate their intended turning direction at all and some cyclists fall off their bicycles when they do.

Cars, motorbikes and other motorised vehicles have indicator lights positioned on the left and right hand sides of the front and back of the vehicle, and operated by the driver from a control on the dashboard. The control is connected to the indicator lights by an electric circuit powered by the car's battery. A driver wishing to turn left operates the left indicator switch, causing the indicator lights on the front left and back left of the car to flash repeatedly. The signal is recognised by other road users and pedestrians. When the driver has completed the left turn, the indicator button is switched off. Cars have also been developed in which the indicator is switched off automatically when the steering wheel turns in the opposite direction (i.e. when the indicated turn has been completed).

It would be relatively impractical for a cyclist to have front and rear indicator lights as used in a car, because this would require wiring between front and rear lights, making the system bulky and difficult to mount and remove from the bicycle.

It is also a problem that when a user is using a vehicle with handlebars, their hands are occupied and therefore they cannot operate any mobile navigation devices. Also, unlike for cars, it is impractical for a vehicle with handlebars to be used with a conventional satellite navigation system.

Summary of the Invention

It is an object of the present invention to provide an improved indicator light device. Another object of the present invention provides an improved navigation device. According to the present invention, there is provided an indicator light device suitable for a vehicle with handlebars, the indicator light device comprising: a gripping unit arranged to be gripped by a user's hand, the gripping unit having an elongated tubular body for fitting over a handlebar, the gripping unit comprising an actuation unit operable by the user's hand; an indicator unit attached to the gripping unit, the indicator unit including an indicator light arranged to emit light for indicating turning direction of the vehicle, the indicator light being controlled by the actuation unit.

In some embodiments, the actuation unit comprises a button arranged to turn the indicator light on when pressed, wherein the indicator light is arranged to be turned off when the button is pressed again or after a predetermined time.

In some embodiments, the indicator light is on, the indicator light is arranged to pulse light at 1-2 Hz.

In some embodiments, the indicator unit and the gripping unit are integrally formed.

In some embodiments, the indicator unit and the gripping unit are releasably engageable.

In some embodiments, the indicator light device further comprises a connecting member for releasably engaging the indicator unit and the gripping unit.

In some embodiments, the connecting member is a retaining boss at which a portion of a first fitting mechanism of the indicator unit is accommodated, the retaining boss having an inner screw thread arrangement that is releasably engaged with an outer screw thread arrangement at an end of the gripping unit.

In some embodiments, the first fitting mechanism is arranged at the indicator unit and a second fitting mechanism is arranged at the gripping unit, the first fitting mechanism and second fitting mechanism being configured to be releasably engageable.

In some embodiments, the first fitting mechanism is a magnetic ball joint and the second fitting mechanism is a magnetic socket. In some embodiments, the indicator unit comprises a pattern light unit arranged to emit light downwards so as to form a predetermined visible pattern on the ground when the vehicle is in use. In some embodiments, the pattern light unit is arranged to form the predetermined visible pattern when the indicator light is turned on.

In some embodiments, the predetermined visible pattern is arranged to vary over a time period so as to show the intended turning direction of the vehicle.

In some embodiments, the predetermined visible pattern is an arrow shape arranged to vary in length to show the intended turning direction of the vehicle.

In some embodiments, the indicator light device further comprises a vibration unit arranged to vibrate the gripping unit.

In some embodiments, the vibration unit is arranged to vibrate when the indicator light is on. In some embodiments, the vibration unit is arranged to vibrate at the same frequency as that of the indicator light.

In some embodiments, the gripping unit comprises a sleeve arranged to be slid over the end of the handlebar. The sleeve may be flexible.

Preferably, a retaining clip may be fixed to the handlebar, for example using a clamp, bolts, or other semi-permanent fixing means. The gripping unit, which maybe a sleeve, may be adapted to be fastened to the handlebar by means of the retaining clip. In this way, the entire indicator light device including the gripping unit and the indicator unit can be conveniently and easily removed, for example to charge the batteries and to prevent theft when the bicycle is left unattended. At the same time, the semipermanently attached retaining clip ensures that the gripping unit is firmly attached when in use. Preferably, the position of the retaining clip on the handlebar can be adjusted by loosening the fixing means, moving the retaining clip and then re-tightening the fixing means. Ideally, the adjustment allows for the gripping unit to be rotated relative to the handlebar, and then fixed in a preferred rotational position. Therefore, the user is able to position the gripping unit to put the controls in a preferred position to suit both the shape of the handlebars of the specific bicycle, and also the user's preferred riding position. Rotating the gripping unit also serves to adjust the direction of the indicator unit, when attached to the gripping unit.

Preferably, the angle of the indicator unit relative to the gripping unit is adjustable, for adjusting the direction in which the indicator light(s) point relative to the bicycle. Preferably, the angle is adjustable, for example at least 30 degrees either side of a direction substantially perpendicular to the handlebar where the gripping unit is attached. Different bicycles will have handlebars which are angled in different positions relative to the direction of travel of the bicycle, and so this flexibility allows the indicator lights to be positioned for the best visibility, on a wide range of bicycles.

In one embodiment, an axis of the indicator unit, when attached to the gripping unit, extends substantially below the handlebar and to the side of the bicycle (i.e. beyond the end of the handlebar). The vertical angle between the indicator unit and the handlebar may be, for example, around 45 degrees. In this way, the indicator unit sits away from the end of the handlebar, and avoids obstructing the area directly underneath the handlebar. Also, where a pattern light unit, for example a laser, is provided, the pattern light unit may include an emitter which points along the axis of the indicator unit, for example around 45 degrees from the vertical. This projects a pattern on the road surface a little way to the side of the bicycle.

Preferably, the indicator unit has a casing including a protective buffer portion. The buffer portion may be in the form of a local thickening of the casing, or may include a separate part attached to the casing. For example, the buffer may clip on, or may be in the form of a sleeve to slide over the indicator unit. It is common to lean bicycles against walls when not in use, and the buffer portion provides the indicator unit with protection when this is done.

In some embodiments, the gripping unit comprises two case portions that are arranged to be secured around the handlebar. In some embodiments, the indicator unit further comprises front and/ or back lights, wherein the front and/ or back lights are controlled independently of the indicator light.

In some embodiments, the indicator light comprises a front-facing indicator light and/ or a back-facing indicator light.

Preferably, an indicator light comprising a front-facing indicator light and/or a back- facing indicator light also includes at least a portion of indicator light which is visible from the side. In one embodiment, the housing of the indicator unit includes a transparent front portion which allows light from the indicator light to escape from the front of the housing to be viewed from the front. The transparent front portion may extend around a corner of the indicator unit, at least on one side, so that light from the indicator light may also be visible from the side. In some embodiments, the indicator light device includes a left gripping unit and a left indicator unit for a left handlebar, and a right gripping unit and a right indicator unit for a right handlebar.

In some embodiments, the indicator light device further comprises a communication system arranged to receive navigation data from an external device, the navigation data including turn directions; wherein the communication system is arranged to control the left and right vibration units to vibrate based on the navigation data received from the external device so as to indicate an upcoming turning direction. In some embodiments, the communication system comprises a left receiver comprised in the left indicator unit and a right receiver comprised in the right indicator unit.

In some embodiments, the indicator light device further comprises a sound output unit arranged to output a sound when the indicator light is switched on.

In some embodiments, the indicator light device comprises a rechargeable power source for supplying power to the indicator light.

In some embodiments, the indicator light device further comprises a charging unit for charging the rechargeable power source, the charging unit being releasably connectable to the left indicator unit and the right indicator unit. Preferably, a charging socket or other connector is provided on the indicator unit, and the indicator unit can be detached from the gripping unit, for example to take the indicator unit indoors to charge. In other embodiments, the whole device including the gripping unit and the indicator unit may have to be removed from the bicycle for charging, or alternatively in some cases the power source may be charged in-situ, with the device installed on the bicycle.

Preferably, the charging socket or connector is provided behind a cover, to protect the charging socket from ingress of water or dirt, especially when the bicycle is being ridden. In one embodiment, the removable cover is at least a part of the transparent section of housing.

The rechargeable power source may be disposed in the indicator unit or in the gripping unit in different embodiments.

According to another aspect of the invention, there is provided a navigation device suitable for a vehicle with left and right handlebars, the indicator light device comprising: a left vibration unit arranged to vibrate a left handlebar; a right vibration unit arranged to vibrate a right handlebar; a controller arranged to receive navigation data, the navigation data including turn directions; wherein the controller is arranged to control the left and right vibration units to vibrate based on the navigation data so as to indicate an upcoming turning direction. In some embodiments, the navigation device further comprises a communication system arranged to receive the navigation data from an external device.

In some embodiments, the external device is a mobile device that is paired with the communication system.

In some embodiments, the navigation device further comprises a left gripping unit arranged to be gripped by a user's left hand and having an elongated tubular body for fitting over the left handlebar, the left vibration unit being arranged to vibrate the left gripping unit; a right gripping unit arranged to be gripped by a user's right hand and having an elongated tubular body for fitting over the right handlebar, the right vibration unit being arranged to vibrate the right gripping unit. In some embodiments, the left gripping unit comprises the left vibration unit and the right gripping unit comprises the right vibration unit. According to another aspect of the invention, there is provided an indicator light device suitable for a vehicle with handlebars, the indicator light device comprising a switch unit arranged to be attached to a handlebar, the switch unit comprising an actuation unit operable by the user's hand, and an indicator unit also arranged to be attached to the handlebar, the indicator unit including an indicator light arranged to emit light for indicating turning direction of the vehicle, the indicator light being controlled wirelessly by the actuation unit.

The indicator light device is particularly suitable for a bicycle with 'drop handlebars'. Normally, when riding into a turn a cyclist will have his hands on the straight top section of the drop handlebars, and the switch unit is ideally attached inward of a grip area of the straight top section, for easy operation for example by the user's thumb. The optimal location for attaching the indicator unit is at the very end of the horizontal lower section of the drop handlebar. Preferably an attachment means in the form of a clamp is provided for releasably attaching the indicator unit to the lower section. The indicator light is activated wirelessly - i.e. the actuation unit of the switch unit includes a wireless transmitter, and the indicator unit includes a wireless receiver. The indicator light turns on or off in response to signals received from the actuation unit. Therefore, no cables are required between the switch unit and the indicator unit, which is highly advantageous in providing a product for drop handlebars, where the switch unit is best positioned at some distance, and around curves in two planes, from the indicator unit.

Preferably, the indicator unit is rotatable with respect to the attachment means.

Embodiments of the indicator unit may be substantially similar to embodiments of the indicator unit according to the first aspect of the invention, but the attachment means may be adapted so that the direction of emitted light from the indicator light is substantially parallel with the section of handlebar to which the indicator unit is mounted. In some embodiments, the angle is adjustable, for example up to 30 degrees in either direction from the direction parallel to the drop section of the handlebar. In principle the horizontal lower section of a drop handlebar is generally in line with the direction of travel, but different handlebars with different designs may have handlebars at different angles, and providing adjustability allows the indicator device to work with a wide range of different bicycles.

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.

Brief Description of the Drawings

Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

Figure ι is a block diagram illustrating the components of an indicator light device according to an exemplary embodiment of the present invention;

Figure 2 is a plan view of an indicator light device according to an exemplary embodiment of the present invention;

Figures 3A to 3C are different perspective views of an indicator unit of the indicator light device, according to an exemplary embodiment of the present invention;

Figure 4 is a side view of a gripping unit of the indicator light device, according an exemplary embodiment of the present invention;

Figure 5 is a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention;

Figure 6 is a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention;

Figure 7 shows a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention;

Figure 8A is a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention;

Figure 8B is a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention;

Figure 9 is a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention; Figure 10 is a block diagram illustrating the components of an indicator light device, according to another exemplary embodiment of the present invention;

Figure 11 is a block diagram illustrating the components of an indicator light device, according to another exemplary embodiment of the present invention;

Figure 12 is a block diagram illustrating the components of a navigation device according to an exemplary embodiment of the present invention;

Figure 13 is a perspective view of a further embodiment of an indicator light device according to the invention; and

Figure 14 is a perspective view of yet a further embodiment of an indicator light device according to the invention.

Detailed Description of the Embodiments

Figure 1 is a block diagram illustrating the components of an indicator light device suitable for a vehicle with handlebars according to an exemplary embodiment of the present invention.

As shown in Figure 1, the indicator light device 10 of the present invention comprises an indicator unit 11 including a first light unit 12 and a power source 13, a gripping unit 14 including an actuation unit 15. The indicator unit 11 can be either formed integrally with the gripping unit 14, or configured to be releasably engaged with the gripping unit 14. A number of different ways the indicator unit 11 can be engaged with the gripping unit 14 will be explained in further detail with respect to Figures 2 and 5 to 9. In this embodiment, the vehicle is a bicycle. However, other embodiments are not limited in this way, and the vehicle could be any vehicle that includes handlebars -for example a motorbike, a tricycle, a scooter or the like.

The first light unit 12, which is an indicator light, is arranged to emit light for indicating turning direction of the bicycle, as intended by a user (i.e. the cyclist of the bicycle). In the present embodiment, the first light unit 12 comprises a front indicator light and a back indicator light, as will be explained in further detail with respect to Figure 2.

Specifically, the first light unit 12 in the present embodiment comprises a first front- facing LED light and a back-facing LED light, such that road users in front of the bicycle or behind the bicycle can be alerted of the cyclist's intended turning direction. However, in other embodiments, other types of lights could be used. Furthermore, in other embodiments, the first light unit 12 comprises a single indicator light -for example one visible from all directions. Moreover, in this embodiment the first light unit 12 is arranged to pulse light at 1-2 Hz. The power source 13 is arranged to provide power to the first light unit.

The gripping unit 14 in the present embodiment comprises an elongated tubular body for fitting over a handlebar of a bicycle, arranged to be gripped by the cyclist's hand. The physical configuration of the gripping unit 14 in the present embodiment is illustrated in Figures 2 and 4, and will be explained in further detail in the following description.

The actuation unit 15 in the present embodiment is a push button arranged at the gripping unit 14 for switching on and off the first light unit 12, and is operable by the cyclist's hand. For example, the cyclist may operate the push button using their thumb.

A sequence of operation of the indicator light device 10 according to the current exemplary embodiment is as follows:

A user fits two gripping units 14 at each of the left and right handlebars of a bicycle. Indicator units 11 are then releasably engaged at ends of the gripping units that point away from the cyclist, such that the indicator units 11 are installed adjacent to ends of the handlebars.

In the initial state, the first light units 12 of the indicator units 11 are in a power off mode. A user, i.e. the cyclist of the bicycle, upon reaching a start point location of a turning manoeuvre, switches on the first light unit 12 on a side corresponding to their intended turning direction.

For example, if the cyclist wishes to make a left turn, they push the actuation unit 15 arranged at the indicator unit 11 at their left hand side to switch on the first light unit 12 on their left hand side so as to indicate their intended turning direction. The first light unit 12 on the left hand side flashes to indicate to other road users nearby that the cyclist is intending to make a left turn. Once the cyclist has completed the turn, they push the actuation unit 15 a second time to stop indicating. As a result, the user is provided with a convenient, removable way of indicating their intended turning direction. Figure 2 is a plan view of the indicator light device according to an exemplary embodiment of the present invention.

As shown in Figure 2, the indicator light device io comprises an indicator unit loo and a gripping unit 200. The indicator unit 100 comprises a front indicator light 120, a back indicator light 110, a front road light 125, a first actuation unit 130, a first fitting mechanism 140, and a pattern light emitting unit 150. The gripping unit 200 comprises an elongated tubular body 210, a second fitting mechanism 220, and a second actuation unit 230. In the present embodiment, the first light unit comprises the front indicator light 120 and the back indicator light 110, both of the front indicator light 120 and back indicator light 110 being arranged to emit light for signalling direction of the bicycle. In the present embodiment, both of the front indicator light 120 and back indicator light 110 are LED lights that are arranged to be switched on and switched off by the second actuation unit 230 in the gripping unit 200. The second actuation unit 230 in this embodiment is a push button.

In other words, to activate the front indicator light 120 and the back indicator light 110, the cyclist pushes the second actuation unit 230. Once the cyclist has completed the turn, they simply push the second actuation unit 230 a second time to stop indicating. The second actuation unit 130 has a simple structure arranged at the gripping unit 200 so that its operation does not hinder the cyclist when they use the second actuation unit 230 to switch the first light unit on or off. In other embodiments, the front indicator light 120 and the back indicator light 110 are turned off a predetermined time after the second actuation unit 230 is pressed.

The pattern light emitting unit 150 is arranged to emit light downwards when the gripping unit 200 is fitted over the bicycle handlebar. In this embodiment, the pattern light emitting unit 150 is arranged to emit laser light in a predetermined visible pattern on the ground when the bicycle is in use. For example, the predetermined visible pattern may be a line, an arrow, a bicycle icon, or the like. Also, the predetermined visible pattern may be a moving shape, e.g. a moving arrow.

Moreover, in the present embodiment, the predetermined visible pattern varies over a time period so as to show the intended turning direction of the bicycle. For example, the predetermined visible pattern may be a shape that varies in length or shape over a time period. In this embodiment, the predetermined visible pattern is an arrow shape with a head and a shaft, the arrow shape becoming longer/ shorter during a

predetermined time cycle to show the turning direction.

The pattern light emitting unit 150 can also be arranged to emit the light in a flashing manner, depending on the cyclist's requirements. The pattern light emitted by the laser light emitting unit 150 provides road users around the cyclist a clearer idea of how far away the cyclist is. The pattern light emitting unit 150 may comprise one or more laser or LED units.

The first fitting mechanism 140 of the indicator unit 100 is arranged to be releasably engaged with the second fitting mechanism 220 at the gripping unit 200 in this embodiment.

In this embodiment, the first fitting mechanism 140 and the second fitting mechanism 220 are configured such that they can be magnetically and releasably engaged with each other. Specifically, in the present embodiment the first fitting mechanism 140 comprises a magnetic protrusion portion (not shown in the drawing) which is received at a magnetic recess portion (not shown in the drawing) at the second fitting mechanism 220. The front road light 125 is a light arranged to illuminate the road ahead of the user, for example in dark road conditions. In this embodiment, the front road light 125 is turned on/off by the first actuator 130.

As a result, the indicator light device of this embodiment provides a combined bicycle light and indicator light. Based on the above, when the user wishes to turn, the second actuator 230 on the left or right gripping unit is pressed. This turns the front and rear indicator lights on and produces a light pattern on the road. As a result, the user can use a simple actuator on the handlebar by means of the gripping unit to clearly show other road users their turning direction.

A number of different perspective views of the indicator unit 100 are shown in Figures 3A to 3C. Specifically, Figure 3A shows a plan view of the indicator unit 100, Figure 3B shows a front view of the indicator unit 100, and Figure 3C shows a rear view of the indicator unit 100.

The gripping unit 200 will now be described in further detail with reference to Figure 4, Figure 4 shows a side view of the gripping unit 200. As shown in Figure 4, the gripping unit 200 comprises an elongated tubular body 210, a second fitting mechanism 220, a second actuation unit 230, and an annular bore 240.

In the present embodiment, the elongate tubular body 210 is configured such that it is releasably fitted over a handlebar of a bicycle and fixed in place. The elongated tubular body 210 is shaped such that it comprises two case portions that are arranged to be secured around the handlebar. The elongated tubular body 210 therefore fits around a standard handlebar of a bicycle snugly and without making the resultant handlebar too bulky for manoeuvre. In other embodiments, the elongated tubular body 210 is formed as a flexible sleeve made of a stretchable material (e.g. Neoprene) to be slid over an end of the handlebar such that the gripping unit 200 is wrapped snugly over the handlebar of the bicycle.

The second fitting mechanism 220 in this embodiment, as mentioned above, is arranged to be releasably engaged with the first fitting mechanism 140 of the indicator unit. Specifically, in the present embodiment, the first fitting mechanism 140 and the second fitting mechanism 220 are configured such that they can be magnetically engaged with each other in a releasable manner.

The second actuation unit 230 is arranged at an end of the gripping unit 200 that is closer to the centre of the handlebars when the gripping unit 200 and is provided in the form of a push button. The cyclist can therefore push the second actuation unit 230 in this embodiment easily with their thumb without having to take their hand off the gripping unit 200.

The annular bore 240 is shaped to receive the handlebar of the bicycle. Specifically, the annular bore 240 has a complementary shape to the shape of the handlebar of the bicycle such that the gripping unit 200 is fitted over the handlebar of the bicycle snugly.

A number of different configurations of engagement between the indicator unit 100 and the gripping unit 200 are illustrated in Figures 5 to 9. These configurations will be described and explained in the following description:

Figure 5 is a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention. In this embodiment, instead of using a first fitting mechanism 140 and a second fitting mechanism 220 that can be magnetically engaged in a manner described above with respect to Figure 2, the indicator unit 100 and the gripping unit 200 are engaged in a different configuration.

As can be seen in Figure 5, the first fitting mechanism 440 of the indicator unit 100 is fitted into a connection unit 300. The connection unit 300 in this embodiment is a retaining boss having an aperture through which the first fitting mechanism 440 is fitted and accommodated. The first fitting mechanism 440 comprises a disc member 441 having a circumference larger than the aperture of the retaining boss 300 such that the first fitting mechanism 440 is retained and accommodated inside the retaining boss 300.

A first threaded arrangement 310 is arranged on the inner surface of the retaining boss 300, the first threaded arrangement 310 being configured to be releasably threaded with the second threaded arrangement 222 on an outer surface of the elongated tubular body 210 of the gripping unit 200. The second threaded arrangement 222 is arranged at an end portion of the elongated tubular body 210 such that it can be engaged with the retaining boss 300.

A friction ring 250 is provided on an inner surface of the elongated tubular body 210 of the gripping unit 200 so as to provide friction between an end portion of the first fitting mechanism 440 and the end portion on an inner surface of the elongated tubular body 210 of the gripping unit 200. Therefore, when the retaining boss 300 which

accommodates the first fitting mechanism 440 is engaged with the gripping unit 200 in a screw-fit manner, the indicator unit 100 is held in place by the friction ring 250 in the gripping unit 200. In the present embodiment, the friction ring 250 is made of rubber.

Figure 6 is a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention. In this embodiment, the indicator unit 100 and the gripping unit 200 are engaged in a different configuration from the other embodiments illustrated in Figures 2 and 5.

As shown in Figure 6, the first fitting mechanism 540 of the indicator unit 100 comprises a socket 541 for releasably engaging with a ball joint 223 arranged at an end of the gripping unit 200. The socket 541 in the present embodiment is substantially ball-shaped so as to allow rotation of the indicator unit 100 in several axes with respect to the gripping unit 200. Also, in the present embodiment, the ball joint 223 and the socket 541 are engaged in a push-fit manner.

An advantage associated with this particular engagement configuration between the indicator unit 100 and the gripping unit 200 is that the cyclist can rotate the indicator unit 100 in several axes, with respect to the gripping unit 200 and the handlebar of the bicycle, according to their requirements and other factors such as the condition of the road and the condition of the weather. This is useful especially in embodiments of the present invention in which the indicator unit 100 comprises a pattern light emitting unit which emits light to the ground around the bicycle, because the cyclist may want to adjust the angle at which the light pattern is emitted to the ground.

Figure 7 shows a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention. In this embodiment, the indicator unit 100 and the gripping unit

200 are engaged in a different configuration from the other embodiments illustrated in Figures 2, 5, and 6.

As shown in Figure 7, the first fitting mechanism 640 of the indicator unit 100 comprises a first adjustment member 641, a disc member 642, and a friction ring 643. The first fitting mechanism 640 of the indicator unit 100 is fitted into a connection unit 700. The connection unit 700 in this embodiment is a retaining boss having an aperture through which the first fitting mechanism 640 is fitted and accommodated. The disc member 642 of the first fitting mechanism 640 has a circumference larger than the aperture of the retaining boss 700 such that the first fitting mechanism 640 is retained and accommodated inside the retaining boss 700.

The friction ring 643 is provided between the disc member 642 and an inner surface around the aperture of the retaining boss 700 so as to reduce the friction between the inner surface of the retaining boss 700 and the disc member 642 when the indicator unit 100 is rotated with respect to the gripping unit 200 via the first adjustment member 641 and the second adjustment member 224. The rotation operation of the first adjustment member 641 and the second adjustment member 224 will be explained in further detail below. In the present embodiment, the friction ring 642 is made of nylon.

The first adjustment member 641 is shown in another perspective view (overhead) in the same drawing in order to illustrate its physical shape and configuration. In the present embodiment, the first adjustment member 641 is a male adjustment ring having a plurality of radially extending protrusions arranged on its outer circumference at fixed angles. Specifically, in the present embodiment, the plurality of protrusions are arranged at 45 degree angles. The first adjustment member 641 is to be engaged with a second adjustment member 224 arranged at the gripping unit 200. A first threaded arrangement 710 is arranged on the inner surface of the retaining boss 700, the first threaded arrangement 710 being configured to be releasably engaged with a second threaded arrangement 226 on an outer surface of the elongated tubular body 210 of the gripping unit 200. The second threaded arrangement 226 is arranged at an end portion of the elongated tubular body 210 such that it can be engaged with the retaining boss 700.

As the retaining boss 700 which accommodates a portion of the first fitting mechanism 640 of the indicator unit 100 is screw-fitted with the end portion of the gripping unit 200, the first adjustment member 641 which is positioned within the retaining boss 700 becomes engaged with the second adjustment member 224 at the gripping unit 200. The second adjustment member 224 in the present embodiment, as illustrated in another perspective view in the same drawing, is a female adjustment ring. The second adjustment member 224 comprises a plurality of grooves arranged on an inner surface so as to receive the plurality of protrusions of the first adjustment member 641.

Specifically, in the present embodiment the plurality of grooves are arranged at 45 degree angles on the inner surface of the second adjustment member 224. The first adjustment member 641 and the second adjustment member 224 are engaged in a snap-fit manner in the present embodiment.

Once the retaining boss 700 has been securely screw-fitted with the gripping unit 200 and the first adjustment member 641 is engaged with the second adjustment member 224, the indicator unit 100 can be rotated in predetermined angles with respect to the gripping unit 200 (45 degrees in the present embodiment). Therefore, the cyclist can adjust the angle at which light is emitted from the front light 110, the back light 120, and the laser light emitting unit 150.

Figure 8A is a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention. In this embodiment, the indicator unit 100 and the gripping unit

200 are engaged in a different configuration from the other embodiments illustrated in Figures 2, 5, 6, and 7.

As shown in Figure 7, the first fitting mechanism 840 of the indicator unit 100 comprises a rotation boss 841 and a flange portion 842. The flange portion 842 extends from the rotation boss 841 so as to engage with an aperture 228 arranged at an end of a second fitting mechanism 227 at an end of the gripping unit 200.

The second fitting mechanism 227 is configured to be rotatable along an axis that is the same as the axis of the gripping unit 200, as demonstrated by arrows in the drawing around the second fitting mechanism 227. The second fitting mechanism 227 comprises an extended portion at which the aperture 228 is formed. As described above, the flange portion 842 of the indicator unit 100 fits through the aperture and becomes engaged with the aperture in a manner as illustrated in the drawing. In this configuration, the rotation boss 841 along with the rest of the indicator unit 100 can be rotated in a vertical axis, i.e. the axis that is perpendicular to the axis of the gripping unit 200.

The indicator unit 100 in this embodiment can therefore be rotated in two

perpendicular axes, i.e. the axis along the gripping unit 200 and the axis perpendicular to the gripping unit 200 as illustrated in the drawing.

Figure 8B is a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention. The arrangement in Figure 8B can be considered as a minor modification of the embodiment as shown in Figure 8A.

Similar to the arrangement in Figure 8A, the first fitting mechanism 840 in this embodiment comprises a rotation boss 841. However, in this embodiment, the rotation boss 841 is comprised of a first element 841a and a second element 841b.

Also, similar to the arrangement in Figure 8A, the gripping unit 200 comprises a second fitting mechanism 227 that is rotatable along the axis of the gripping unit 200, having an extended portion at which an aperture 228 is formed.

The first element 841a and the second element 841b of the rotation boss 841 are positioned at opposite surfaces of the extended portion of the second fitting mechanism 227. The first element 841a and the second element 841b are shaped such that together they define a threaded receiving portion which is arranged to receive a screw member 843. When the screw member 843 is fully threaded into the receiving portion of the rotation boss 841, the first element 841a and the second element 841b of the rotation boss 841 is held in place while being rotatable along a vertical axis, i.e. the axis that is perpendicular to the axis of the gripping unit 200. The indicator unit 100 in this embodiment can therefore be rotated in two

perpendicular axes, i.e. the axis along the gripping unit 200 and the axis perpendicular to the gripping unit 200 as illustrated in the drawing.

Figure 9 is a cross-sectional view of an indicator unit and a portion of the gripping unit of the indicator light device, according to another exemplary embodiment of the present invention. In this embodiment, the indicator unit 100 and the gripping unit 200 are engaged in a different configuration from the other embodiments illustrated in Figures 2 and 5 to 8.

As shown in Figure 9, the first fitting mechanism 940 of the indicator unit 100 comprises a magnetic ball joint 941. The gripping unit 200 comprises a magnetic socket 228 at which the magnetic ball joint is magnetically and releasably attached. Hence, once the magnetic ball joint 941 is engaged with the magnetic socket 228, the indicator unit 100 can be rotated in several axes with respect to the gripping unit 200. An advantage associated with this particular engagement configuration between the indicator unit 100 and the gripping unit 200 is that the cyclist can rotate the indicator unit 100 in several axes, with respect to the gripping unit 200 and the handlebar of the bicycle, according to their requirements and other factors such as the condition of the road and the condition of the weather. This is useful especially in embodiments of the present invention in which the indicator unit 100 comprises a laser light emitting unit which emits light to the ground around the bicycle, because the cyclist may want to adjust the angle at which the laser light is emitted to the ground.

Figure 10 is a block diagram illustrating the components of an indicator light device, according to another exemplary embodiment of the present invention.

As shown in Figure 10, the indicator light device 20 comprises an indicator unit 21 including a first light unit 22 and a power source 23, a gripping unit 24 including an actuation unit 25 and a vibration unit 26, and a communication system 27. Similar to the embodiment as illustrated in Figure 1, the indicator unit 21 can be either formed integrally with the gripping unit 24, or configured to be releasably engaged with the gripping unit 24.

The present embodiment is similar to that illustrated in Figure 1, only with the addition of the vibration unit 26 and the communication system 27. The indicator unit 21, the first light unit 22, the power source 23, the gripping unit 24, and the actuation unit 25 are as described above with respect to Figure 1.

Two indicator light devices 20 are used in this embodiment, the two indicator light devices 20 respectively arranged at a left handlebar and a right handlebar of a vehicle. In this particular embodiment, the gripping unit 24 comprises a left gripping unit and a right gripping unit (not shown in the drawing) that are respectively arranged at the left handlebar and the right handlebar of a vehicle, and the vibration unit 26 comprises a left vibration unit and a right vibration unit (not shown in the drawing). The left vibration unit is arranged at the left gripping unit and the right vibration unit is arranged at the right gripping unit. The left vibration unit is arranged to vibrate the left gripping unit and the right vibration unit is arranged to vibrate the right gripping unit.

The communication system 27 is arranged to receive navigation data from an external device, the navigation data including turn directions. The communication system 27 is arranged to control the left and right vibration units to vibrate based on the navigation data received from the external device so as to indicate an upcoming turning direction.

In this embodiment, the communication system comprises a left receiver (not shown in the drawing) comprised in the left indicator unit and a right receiver (not shown in the drawing) comprised in the right indicator unit. For example, the left receiver may be a Bluetooth communication module for receiving data from the cyclist's Smartphone that is paired with the left receiver. The right receiver may also be a Bluetooth

communication module for receiving data from the cyclist's Smartphone that is paired with the right receiver.

The indicator light device 20 in this embodiment further comprises a control unit arranged to control the vibration unit to vibrate based on the data received from the external device. Hence, on receipt of left turn data at the left receiver, the left vibration unit may vibrate -indicating to the user that a left turn is required. On receipt of right turn data at the right receiver, the right vibration unit may vibrate -indicating to the user that a right turn is required.

As an example, when the external device of the cyclist detects that the cyclist is at a start point location of a turning manoeuvre (e.g. turn left), it transmits relevant data to the left receiver of the indicator light device. In response to this received data, the left vibration unit that is arranged at the gripping unit fitted over the left handlebar of the bicycle vibrates. The cyclist would then be alerted to turn left upon experiencing this vibration. Figure 11 is a block diagram illustrating the components of an indicator light device, according to another exemplary embodiment of the present invention.

As shown in Figure 11, the indicator light device 30 comprises an indicator unit 31 including a first light unit 32 and a rechargeable power source 33, a gripping unit 24 including an actuation unit 25, and a charging unit 37. Similar to the embodiment as illustrated in Figure 1, the indicator unit 31 can be either formed integrally with the gripping unit 34, or configured to be releasably engaged with the gripping unit 34. The present embodiment is similar to that illustrated in Figure 1, with the power source replaced by a rechargeable power source 33, and the addition of the charging unit 37. The indicator unit 21, the first light unit 22, the gripping unit 24, and the actuation unit 25 are as described above with respect to Figure 1. The rechargeable power source 33 is arranged at the indicator unit 31 and is arranged to supply power to the first light unit 32. The charging unit 37 is provided for charging the rechargeable power source 33. In other words, when the rechargeable power source has a low battery status, the charging unit 37 can be connected to the rechargeable power source 33 at the indicator unit 31 so as to recharge the rechargeable power source 33.

In this embodiment, the charging unit 37 is a USB charging unit that can be releasably connected to the indicator unit. In some embodiments where two indicator light devices are used, i.e. on a left side and a ride side of a vehicle, the charging unit may be arranged such that it is capable of charging two indicator units at once.

In some embodiments of the present invention, the indicator light device may further comprise a vibration unit arranged at the gripping unit, wherein the vibration unit is arranged to vibrate the gripping unit when the first light unit is switched on.

For example, the vibration unit may be arranged to vibrate at the same frequency as that of the first light unit. In such embodiments, the vibration unit may be switched on and off using the actuation unit used for switching on and off the first light unit. The vibration unit may comprise a vibration motor. In alternative embodiments, the elongated tubular body of the gripping unit may be formed of other materials (e.g. plastic) instead of a stretchable material.

In alternative embodiments of the present invention, instead of a push button, the actuation unit may be provided in another physical form. In alternative embodiments of the present invention, the first light unit may be arranged to be switched off automatically after a predetermined time, instead of or in addition to being switched off via the actuation unit.

In alternative embodiments of the present invention, instead of using a single actuation unit to switch on and off the front light and the back light, separate actuation units are provided at the indicator light device for switching on and off the front indicator light and the back indicator light respectively.

In alternative embodiments of the present invention, the actuation unit for switching on and off the first light unit may be arranged on the indicator unit instead of the gripping unit.

Although the embodiments of the present invention are described with references to the indicator light device being used on a bicycle, it will be appreciated that the indicator light device is compatible and may be used on other vehicles with handlebars.

Figure 12 is a block diagram illustrating the components of a navigation device according to an exemplary embodiment of the present invention. As shown in Figure 12, the navigation device 40 comprises a left vibration unit 41, a right vibration unit 42, and a controller 43. The navigation device 40 is suitable for a vehicle with left and right handlebars.

The left vibration unit 41 is positioned at the left handlebar of the vehicle and the right vibration unit 42 is position at the right handlebar of the vehicle. The left vibration unit 41 is arranged to vibrate the left handlebar and the right vibration unit 22 is arranged to vibrate the right handlebar. The controller 43 is arranged to receive navigation data including turn directions, and is also arranged to control the left and right vibration units 41, 42 to vibrate based on the received navigation data so as to indicate an upcoming turning direction.

In the present embodiment, the left vibration unit 41 is arranged at a left gripping unit (not shown in the drawing) and the right vibration unit 42 is arranged at a right gripping unit (also not shown in the drawing). Specifically, the left gripping unit comprises the left vibration unit 41 and the right gripping unit comprises the right vibration unit 42. The left gripping unit comprises an elongated tubular body for fitting over the left handlebar, and the right gripping unit comprises an elongated tubular body for fitting over the right handlebar. An example of gripping units that may be used with the navigation device 40 is illustrated in Figure 4. The navigation device may further comprise a communication system (not shown in the drawings) arranged to receive the navigation data from an external device. The external device may be a mobile device that is paired with the communication system.

Specifically, the external device may be Smartphone of a user of the navigation device. In other embodiments, the navigation device may comprise a suitable satellite navigation device (e.g. comprising a GPS receiver and map storage means). In such embodiments, the controller may receive the navigation data from this satellite navigation device, rather than from an external system. Using such a navigation device, the user does not need to look at a map to be informed of upcoming turning directions. Hence, the usability of the navigation device for a vehicle with left and right handlebars is improved.

Referring now to Figure 13, another embodiment of an indicator light device according to the invention is indicated generally at 1000. Like the other embodiments, the indicator light device 1000 includes a gripping unit 1002 and an indicator unit 1004. The gripping unit 1002 is attached to the handlebar via a releasable clip 1006. The releasable clip 1006 is semi-permanently attached to the handlebar by a compressible collar 1008 which can be tightened by a screw (not shown). The releasable clip is ideally positioned so that it sits substantially on an underside of the handlebar, although this maybe adjusted by untightening the collar 1008 to allow for a user's preference.

With the releasable clip 1006 installed, the gripping unit 1002 may be temporarily and releasably but firmly attached to the handlebar by sliding the gripping unit 1002 over the handlebar so that it engages with the clip 1006. The clip 1006 maybe in the form of a resilient detent which is biased outwardly of the handlebar, but can be pushed towards the handlebar. An aperture of the gripping unit 1002 may be appropriately sized to receive the clip 1006, so that the clip holds the gripping unit 1002 when the gripping unit 1002 is positioned over the handlebar, with the clip 1006 received in the aperture. To release the gripping unit 1002, the clip may be pushed towards the handlebar, allowing the gripping unit 1002 to be removed by sliding.

The gripping unit includes switches for controlling the indicator light and headlight. One of the switches is indicated at 1010. The other is not visible in Figure 13, but the two switches are provided substantially around an upper surface of the gripping unit 1002, when the gripping unit is installed with the clip 1006 substantially on an undersurface. The switches are therefore positioned conveniently for operation by a rider's thumb, although their location can be adjusted to suit user preference, by adjusting the position of the clip 1006 on the handlebar as described above.

The indicator unit 1004 is attached to the end of the gripping unit 1002, via an adjustable connector 1012 which extends substantially from an underside of the gripping unit 1002. The connector is rotatably adjustable in a horizontal plane, so that the direction in which the indicator unit 1004 faces is adjustable by, for example, 30 degrees either side of a direction which is substantially perpendicular with the elongate axis of the gripping unit. In this way, the indicator unit 1004 can be adjusted so that it faces substantially forwards, on a wide range of bicycles which will have handlebars at different angles.

The indicator unit 1004 includes a housing 1014, which may be made from plastics. The housing includes transparent portions 1016, 1018 respectively on front and rear surfaces, so that light from front and rear indicator lights 1020, 1022 and headlight 1024 can escape the housing. The transparent portions 1016, 1018 extend around corners of the housing 1014, so that sections of either side of the housing 1014 are also transparent, allowing the indicator lights 1020, 1022 to be seen also from the sides. The front transparent portion 1016 is provided in the form of a removable cover. The front transparent portion 1016 can be removed to reveal a charging connector, which can be used to charge an internal rechargeable battery of the indicator unit 1004.

On an underside of the indicator unit housing 1014, a pattern light unit 1026 is provided. The pattern light unit 1026 may include a laser, which projects an arrow or another pattern onto the ground, to the side of the bicycle in use. With the pattern light unit 1026 on the underside of the indicator unit housing 1014, and the indicator unit housing 1014 disposed at around 45 degrees from the horizontal plane of the handlebars, the pattern light unit 1026 will project at around 45 degrees, so that the light hits the road surface at a sideways distance from the bicycle of around the height of the handlebars, which maybe for example around 100 - 150cm. The indicator unit housing 1014 includes a reinforced section 1028 which extends around the underside of the housing and up the lower portion of each side. The reinforced section 1028 in this embodiment is in the form of a locally thickened area of the plastic housing, but in other embodiments may be for example a clip-on replaceable section or a sleeve. The purpose of the reinforced section 1028 is to protect the indicator unit housing 1014 if the bicycle is leaned against a wall.

Referring now to Figure 14, a further embodiment of an indicator light device is indicated generally at 1100. The indicator light device 1100 includes an indicator unit 1102 which is substantially similar to the indicator unit 1004 described above. The indicator unit 1102 is designed to be fitted to drop handlebars, as illustrated, specifically to the end of the lower section of the drop handlebar which runs

substantially parallel with the direction of travel of the bicycle. The indicator unit 1102 is attached to the handlebar via an adjustable mount 1104, which allows the direction of the indicator unit 1102 to be adjusted. The adjustable mount includes a compressible collar to grip around the end of the handlebar when tightened, and a rotatable coupling which can be adjusted to set the direction of the indicator unit 1102, and then preferably locked in position.

The indicator light device 1100 further includes a switch unit 1106 which is essentially a shortened version of gripping unit 1002. The switch unit 1106 is designed to be attached to the handlebar, next to an existing gripping portion of the handlebar, for convenient operation by the user's thumb. The position of the switch unit 1106 may be adjusted to suit the user's preference and riding position. In this embodiment, the switch unit 1106 includes a transmitter, and the indicator unit 1102 includes a receiver. The switch unit is adapted to transmit a signal to the indicator unit when a switch is pressed, and the indicator unit is adapted to switch on or off the indicator light and/or the head light in response to a signal received from the switch unit.

It will be appreciated that the term "comprising" does not exclude other elements or steps and that the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to an advantage. Any reference signs in the claims should not be construed as limiting the scope of the claims.

Although claims have been formulated in this application to particular combinations of features, it should be understood that the scope of the disclosure of the present invention also includes any novel features or any novel combinations of features disclosed herein either explicitly or implicitly or any generalisation thereof, whether or not it relates to the same invention as presently claimed in any claim and whether or not it mitigates any or all of the same technical problems as does the parent invention. The applicants hereby give notice that new claims may be formulated to such features and/or combinations of features during the prosecution of the present application or of any further application derived therefrom.