TECHNICAL FIELD

The present invention relates to a protection of a child which is seated in a child seat of e.g. a bicycle and more specifically to an inflatable airbag for such a seat.

BACKGROUND

Every day accidents happen where bicycles are involved. In order to avoid severe injuries the cyclist may wear protection such as a helmet or protective garments. However, a lot of cyclists today transport their children on the back of the bicycle which means that they are also exposed to dangerous situations. The alternative safety devices for the person sitting behind the cyclist are few on the market but what is more important to a parent than the safety of their child. A frontal or back impact with e.g. a vehicle will make the bicycle flip over, leaving the child completely unprotected. If the cycle falls to the ground or get hit by a car what protects the child besides from a helmet?

SUMMARY

An object of the present invention is to provide an improved child protection device. This object is achieved by a technique defined in the appended independent claims; certain embodiments being set forth in the related dependent claims.

In a first aspect there is provided a device for protecting a child in a child seat of a bicycle or the like, during an unexpected event, e.g. a collision or fall. The device comprises a case unit and an inflatable airbag unit, which is arranged within the case unit in an idle state. The airbag unit is configured to inflate to an inflated state in case of an abnormal movement of the child seat and to at least partly cover the child in said inflated state. The device at least mitigates the risks of injuring the child in an impact with e.g. another or the ground. In an embodiment of the invention the device is detachably mounted to the child seat. This is advantageous since the device then may be used for several child seats.

In another embodiment the device is mounted to a back portion of a back rest of the child seat. This is an advantageous since it is easy for the user to access the back portion of the seat.

In yet another embodiment the inflatable airbag unit comprises at least three inflatable portions. The first portion is configured to inflate around one side of said child seat and child, the second portion is configured to inflate around the other side of said child seat and child, and the third portion is configured to inflate above the top of said child seat and at least partly down over the head of the child. This gives a good protection for the child during an impact.

In an alternative embodiment the device further comprises inflator means, where the inflator means comprises a sensor element which is configured to detect an abnormal movement of said child seat and control means which is connected to the sensor element and which controls the inflation of the airbag unit.

In an embodiment the device further comprises an indicator which is configured to indicate a mode of the device. In this way it is easy for the user to detect the status of the device, e.g. if the device is properly attached to the child seat or if the battery needs to be charged.

In another embodiment the indicator is configured to display the indication on the top surface if the top portion. The indication is then very easy to spot for a user.

In a second aspect there is provided a child seat for a bicycle comprising a device as described above.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the invention will be described in the following, reference being made to the appended drawings which illustrate non-limiting examples of how the inventive concept can be reduced into practice.

Fig. 1 is a perspective view of the back side of a child seat provided with a device according to an embodiment of the present invention, Fig. 2 is a perspective view of the back side of a child seat showing a base portion and a case unit of the device shown in Fig. 1,

Fig. 3 is an exploded view of the device in Fig 1,

Fig. 4 shows the elements of a inflator means according to an embodiment of the invention,

Fig. 5 is a top view of the base portion of the device,

Fig, 6 is a bottom view of the case unit of the device

Fig. 7 is a view of the inside of the case unit of the device,

Fig. 8 is a top view of the case unit of the device, and

Figs 9a-9d shows a sequence of when an airbag unit of the device is inflated.

DETAILED DESCRIPTION OF EMBODIMENTS

With reference to the figures a device 10 for protecting a child C in a child seat S of e.g. a bicycle B or the like is provided. The protection device 10 is able to protect the child C during an unexpected event or an abnormal movement of the child seat S, e.g. a collision or a fall. The device 10 includes a case unit 11 and an inflatable airbag unit 12 which is arranged within the case unit 11 in an idle state. The airbag unit 12 is configured to inflate to an inflated state in case of the abnormal movement of the child seat S and to at least partly cover the child C in the inflated state. The inflation process is shown in Figs 9a-9d.

The device 10 is preferably detachably mounted to the child seat S, which can be seen in Figs 1 and 2. This means that the device 10 may be moved between child seats S or bicycles B depending which one is in use. In order to mount the device 10 easily to the child seat S it further includes a base portion 14 which is mounted to the child seat S and which is configured to receive the case unit 11. The case unit 11 is detachably mounted to the base portion 14 whereas it is preferred that the base unit is fixed to the child seat S by means of e.g. screws 15. Each transportation unit, e.g.

bicycle, which is intended to use the device 10 may then each have a base portion 14 to which one joint case unit 11 is attachable to. In an alternative embodiment (not shown) the device is detachably mounted to a part of the transportation unit, e.g. bicycle. The case unit 11 is provided with a protrusion 17 on its bottom surface 18, see Fig. 6, which corresponds to a recess 19 of the top surface 20 of the base portion 14, see Figs 3 and 5. In order to attach the case unit 11 to the base portion 14 the protrusion is inserted into the recess 19 and then rotated so that the protrusion 17 is secured in the recess 19. The base portion 14 is preferably mounted to a back portion P of a back rest R of the child seat S but may in another embodiment be mounted elsewhere on either the child seat S or the bicycle B.

The inflatable airbag unit 12 has at least three inflatable portions 22a, 22b, 22c, which can be seen in Figs 9a-9d, where the first portion 22a is configured to inflate around one side of the child seat S and child C, the second portion 22b is configured to inflate around the other side of the child seat S and child C, and the third portion 22c is configured to inflate above the top of the child seat S and at least partly down over the head of the child C. The three inflatable portions 22a, 22b, 22c may in one embodiment be made in one piece but may in an alternative embodiment be made as at least two separate pieces. The airbag unit 12 is preferably made of an ultra strong nylon fabric but may be made of any other material suitable for the purpose.

Further, shown in Fig. 3, the case unit 11 includes a bottom portion 24 and a top portion 25 which in an idle state are attached to each other, where the top portion 25 is configured to be removed during inflation of the airbag unit 12. The bottom and top portion 24, 25 are each provided with a rim portion 26a, 26b which enables the top portion 25 to be evenly removed from the bottom portion 24 during inflation of the airbag unit 12. In an embodiment the entire top portion 25 falls off the bottom portion 24 during the beginning of the inflation process. In an alternative embodiment the top portion breaks into pieces during the inflation. The rim portion 26 is configured to make the removal of the top portion 25 from the bottom portion 24 more controlled by being more sensitive to increased pressure from e.g. the airbag unit 12. The portions 24, 25 are further provided with gripping areas 28, three on each portion 24, 25, made of a different material than the rest of the portions 24, 25, which are easy to grip for a user. The rim portion 26 and these gripping areas 28 are made of a softer material than the rest of the portions 24, 25 which easily may break during the increased pressure, which means that the inflation process is not hindered by the removal of the top portion 25 from the bottom portion 24. This softer material is preferably a soft flexible material such as rubber. The material used for the rest of the top and bottom portion 24, 25 is preferably a hard non-flexible material, e.g. a hard plastic material. Other materials e.g. carbon fiber may also be used. In alternative embodiment the removal of the top portion from the bottom portion may be done differently.

In another embodiment of the invention (not shown) the case unit includes a bottom portion and a top portion, which is an idle state are attached to each other, where the top portion is configured to be opened during inflation of the airbag unit. The top portion may be opened from its middle, like a flower, so that the airbag unit may expand without being hindered.

In order to inflate the airbag unit 12 the device 10 further includes inflator means 30, see e.g. Fig. 7, which is arranged within the case unit 11 during the idle state and which is configured to inflate the airbag unit 12 during the abnormal movement of the child seat S. The inflator means 30 which is more specifically shown in Fig. 4 includes, in this embodiment, a sensor element 31 which is configured to detect the abnormal movement of the child seat S, an inflation valve 32 and control means 33, e.g. a circuit, which is connected to the sensor element 31 and which controls the inflation valve 32. In a preferred embodiment the sensor element 31 is an accelerometer which detects a change and/or directional change of movement and/or acceleration. The inflator means 30 preferably also includes a rechargeable battery pack 34, a gyroscope 35, which measures the position of the device 10, a carbon dioxide cartridge 36 and a USB port 37. The USB port 37 is for charging the battery pack 34. In alternative embodiments the content of the inflator means 30 can be different from what is described above. For example, the inflator means may use another gas or liquid except from carbon dioxide or a combination of gas and fuel, a so called hybrid.

In order to know that the device 10 is e.g. correctly mounted to the base portion 14 the device 10 further includes an indicator 40 which is configured to indicate a mode of the device 10, see e.g. Fig 8. The indicator 40 is configured to indicate the mode by means of e.g. light and/or sound. More specifically the indicator 40 is configured to indicate the mode of the battery pack 34 of the inflator means 30 and/or if the case unit 11 is correctly mounted to the base portion 14. The indicator 40 is configured to display the indication on the top surface 27 of the top portion 25 so that the user easily can see that everything is ok before taking off.

Finally, although the inventive concept has been described above with reference to specific embodiment, it is not intended to be limited to the specific form set forth herein. Rather, the invention is limited only by the accompanying claims and, other embodiments than the specific above are equally possible within the scope of these appended claims.