Technical Field

The present invention relates to a movement control mechanism configured for concealing and/or exposing control buttons which are disposed particularly on the control panels of domestic appliances and allows the use of said domestic appliances according to the preferred purpose.

Prior Art

Today, such appliances as cookers, washing machines and dishwashers used in houses and workplaces as auxiliary equipment comprise a control panel in order that user can monitor and control the functions. Such control panel comprises one or more buttons. These buttons are positioned on the spaces, preferably circular, arranged on the control panel and mounted in the shafts connected to the control card directly or by way of an intermediate piece. As the buttons are subject to rotating around their own axes, the shafts in connection with the buttons also move and allow the selection of functions based on the preferences of the user, which are arranged in a predetermined position, according to the request by the user. Said control buttons disposed on the control panels of domestic appliances can, if desired, be concealed in the control panel and exposed from the panel again when needed for use. For example, a force parallel to the ground plane is applied on a button which is disposed in the control panel of a domestic appliance and currently concealed therein and thus it is released, thereby making said button protrude from the control panel. Afterwards, this button can be rotated around its own axis and the preferred adjustment can be made. The button, having completed its function, is introduced into/concealed in the control panel upon pushing the button again by applying a similar force parallel to the ground plane. In this case, said button remains concealed in the panel until next use and thus, not only an aesthetic appearance of the appliance for which it is used is provided but also the use of unwanted users (children) is prevented.

Some of the control buttons in the state of the art do not have the aforementioned movement control mechanism and those having such mechanism cannot be brought to the same level as the control panel and they protrude from the control panel.

The International Patent Application No. WO2016039705A1 / TR201410772, claiming priority in Turkey, of the state of the art discloses a mechanism which comprises at least one hollow, cylindrical body which is introduced into the button which the user is in direct contact; at least one hollow cylindrical inner member which is mounted on the device that is calibrated and/or controlled, and on which the body is slid back and forth; at least one inner spring which enables the back and forth movement of the body on the inner member by introducing into the body, and which also limits this movement; at least one moving arm which enables the body to be locked on the inner member in back or forth movement, and which is aquaplaned on the inner surface of the body by being fixed on the inner member; and at least one fixing spring which is positioned on the inner surface of the inner member, and enables the inner member to hold onto the place where it is mounted tightly. In this prior art document, the movement is performed by means of five components. It is also disclosed in this document that the movement is stopped by means of a moving arm. However, such stopping operation is not detailed. Furthermore, the description discloses that the moving arm has a lock and the body is released from the lock of the moving arm and it moves away from the inner member with the help of the inner spring. Similarly, however, there is no teaching as to how said process is performed. In addition to these, it is described throughout the description that while the moving arm moves on the locking slide provided on the inner surface of the body along the body, it also compresses or loosens the inner spring. Such performance of the locking on the locking slide along the body causes the deformation of both the moving arm and the body and at the same time results in a very short service life of a concealable button mechanism. Therefore, it has been deemed necessary to provide a novel mechanism wherein there is no sliding on the body and the inner spring is not compressed or loosened by the moving arm. When this prior art document and the invention according to the present application are evaluated, it will be seen that the present invention also consists of five components similar to said prior art document. The most distinctive characteristic of the present invention from this prior art document is the way the position identifier (the component referred to as the moving arm in the prior art document) performs the locking process together with the barrier. In the novel design, there exists no locking slide and the inner spring is neither compressed nor loosened by the position identifier. In the novel design, however, said position identifier is generally made up of an orientating extension and a locking extension. Apart from this, the body is provided therein with a barrier and the position identifier and the barrier contact with one another in a way to limit the movement of the moveable body. On the surface of the orientating extension facing the stationary body is an inclined surface. Thus, when the orientating extension disposed in the position identifier fits in the hole and contacts with the resilient element, a determined angle is formed between the central axis of the locking extension and the central axis of the stationary body. Therefore, the locking extension is slightly angled. This, in turn, enables the position identifier to readily move inside the barrier in cases when it is engaged with the barrier, and also to be readily displaced from the barrier.

The European Patent Application No. EP2550571B1 / TR201002246, claiming priority in Turkey, of the state of the art discloses a push and pull mechanism which provides forward and backward movement of the control buttons of the appliances including control panels and which operates without constrain and in a balanced way. By means of the push and pull mechanism which is the subject of the invention, control buttons come out of the control panel during the use of appliance and enter into the control panel in out of use situations; the damage to control button is prevented during the transportation of the appliance in which it is used and it takes up less place. This invention comprises: at least one movable part which enables the push and pull mechanism to fasten to the button in the control panel of the appliance and which can move in forward and backward positions; at least one fixed part which is placed into the movable part and which enables it to be locked in forward and backward positions and to fasten to the element shaft that will be operated; at least one latch which is placed on the movable part and which enables the movable part to be locked and unlocked; and at least one flexible part which is placed on movable part and which enables latch to spring by applying force on the said latch and to be fixed in its place. In this invention, there exists a movable part which moves on the fixed part, and two latches and two flexible parts are disposed in order to stop this movement of said movable part and fixed part at certain positions. Forcing the movable part to move in one direction within the fixed part, on the other hand, is ensured by means of a spring. In this patent, a total of nine separate components are used, which, in turn, causes complexity in terms of components. The fact that said components operate in synchronization with one another and the excessive number of components cause problems in terms of costs in case of a breakdown, bringing about production and maintenance problems as well. In the present invention, however, a solution to the technical problem has been achieved by using four components, and thus efforts have been made to ensure that the components remain in the preferred positions.

And another document in the state of the art is the International Patent Application No. W09811574 / TR9600723, claiming priority in Turkey, wherein a retractable rotary control knob used in all kinds of electrical household appliances, which protrudes from the control surface when pushed and which may be used for the operation of the components that are commanded by a turning or push-pull rod is disclosed. The fact that the cylindrical pin operating inside the mechanism movement space is produced as an integral part of the plastic structure used for the cap enables the realization of the control knob by using fewer components as compared with similar systems.

Objects of the Invention

The object of the present invention is to provide a movement control mechanism which enables the control buttons to be exposed out of the control panel during the use of the appliance and to remain inside the control panel when not in use.

Another object of the present invention is to provide a movement control mechanism in which the movement is performed without being offset or deviating from the central axes.

Another object of the present invention is to provide a movement control mechanism which is capable of locking without sliding. Yet another object of the present invention is to provide a movement control mechanism in which compressing and loosening of the inner spring are not performed by any locking element.

Still another object of the present invention is to provide a movement control mechanism which may be used as a child safety mechanism thanks to the concealable nature thereof.

And another object of the present invention is to provide a movement control mechanism which reduces packaging costs thanks to the fact that the button does not protrude from the control panel 20-25 mm and which also reduces transportation costs by occupying less space in container, truck trailer or truck loadings during transportation.

Brief Description of the Invention

The movement control mechanism which has been developed for achieving the objects of the present invention and which is defined in the first claim as well as the other dependent claims generally consists of a moveable body, a stationary body, a resilient element, a retaining element, and a position identifier. The moveable body is preferably mounted in the button and the stationary body is mounted in the shaft of the appliance to be operated. The moveable body is capable of performing forward and backward movement along the stationary body. Said movement is limited by way of the position identifier. Detailed Description of the Invention

The movement control mechanism which has been developed for achieving the objects of the present invention is illustrated in the accompanying drawings, in which:

Fig. 1. Perspective view of the buttons with the released position and concealed position being defined, along with the control panel.

Fig. 2. The cross-sectional perspective view of the button in concealed position and the perspective view of the button in released position along with the control panel.

Fig. 3. Cross-sectional perspective view of the movement control mechanism along with the shaft of the appliance to be operated and the button.

Fig. 4. Perspective view of the movement control mechanism.

Fig. 5. Exploded perspective view of the movement control mechanism.

Fig. 6. Exploded perspective view of the movement control mechanism from another angle. Fig. 7. Perspective view of the moveable body.

Fig. 8. Perspective view of the moveable body when sectioned from a plane. Fig. 9. Perspective view of the moveable body when sectioned from a plane from another angle.

Fig. 10. Perspective view of the barrier disposed in the moveable body.

Fig. 11. Perspective view of the stationary body.

Fig. 12. Perspective view of the stationary body when sectioned from a plane. Fig. 13. Perspective view of the stationary body from another angle.

Fig. 14. Perspective view of the stationary body when sectioned from another plane.

Fig. 15. Perspective view of the position identifier.

Fig. 16. Perspective view of the position identifier from another angle.

Fig. 17. Another perspective view of the position identifier from a different angle.

Fig. 18. The perspective view of the movement control mechanism showing the first contact of the position identifier and the barrier after the moveable body starts to move upon applying the first pressing force on the button.

Fig. 19. The perspective view of the movement control mechanism showing the movement of the position identifier in continuation of the first contact of the position identifier and the barrier after the moveable body starts to move upon applying the first pressing force on the button.

Fig. 20. Perspective view of the movement control mechanism showing the state in which the barrier locks the position identifier, i.e. switching from the released position to the concealed position.

Fig. 21. Perspective view of the movement control mechanism showing the state in which the position identifier is released from the barrier upon applying the second pressing force on the button and moves within the interval.

Fig. 22. Perspective view of the movement control mechanism showing the state in which the position identifier is completely released from the barrier, i.e. switching from the concealed position to the released position. The parts shown in the drawings are enumerated individually and the reference numerals corresponding thereto are given below. 1. Movement control mechanism

2. Moveable body

2.1. Main portion

2.1.1. Guide opening

2.1.2. Flat surface

2.1.3. Guide protrusion

2.1.4. Barrier

2.1.4.1. Orienting block

2.1.4.2. Orienting surface

2.1.4.3. Retaining block

2.1.4.4. Guide surface

2.1.4.5. Retaining surface

2.1.4.6. Seating surface

2.1.4.7. Rotating surface

2.1.4.8. Interval

2.2. Connection portion

2.2.1. Vertical seating groove

2.2.2. Horizontal seating groove

2.2.3. Resilient element protrusion

3. Stationary body

3.1. Seating portion

3.1.1. Resilient element clearance

3.1.2. Blocking extension

3.1.3. Hole

3.2. Guide portion

3.2.1. Guide extension

3.2.2. Guide groove 3.2.3. Connection clearance

3.2.3.1. Retaining element clearance

4. Resilient element

5. Retaining element

6. Position identifier

6.1. Orientating extension

6.1.1. Inclined surface

6.2. Locking extension

6.3. Locking protrusion

6.4. Support protrusion

A. Shaft of the appliance to be operated

B. Control panel

C. Button

D. Released position

E. Concealed position

Throughout the description, the expression shaft (A) of the appliance to be operated will be used to refer to the shaft which allows adjustment by pushing and/or rotating a component arranged in the control panel (B) of any domestic appliance, said shaft being connected to the component. Said shaft (A) of the appliance to be operated may for example be many different shafts including a shaft connected to the gas tap regulating gas flow in cooking appliances, a shaft connected to the program device controlling the program flow in washing machines, a shaft connected to the heat thermostat in appliances with thermostat, a shaft connected to the potentiometer in appliances with potentiometer, or the shafts of lighting switches used in houses and workplaces.

The term "released position (D)" hereinafter used throughout the description means the unconcealed, i.e. exposed, position of the button (C) (Fig. 1) while the "concealed position (E)" means the concealed position of the button (C) (Fig. 1). The movement control mechanism (1) configured for taking the control buttons (C), which are disposed particularly on the control panels (B) of domestic appliances and allows the use of said domestic appliances according to the preferred purpose, to the released position (D) and/or to the concealed position (E) basically comprises:

at least one moveable body (2) mounted in the button (C) and moving together with the button (C),

at least one stationary body (3) which is mounted in the shaft (A) of the appliance to be operated and made immobile and which guides the movement of the moveable body (2) during the process in which the button (C) is concealed or exposed,

at least one resilient element (4) which is provided between the moveable body (2) and the stationary body (3) and which, in case of the concealed position (E) of the button (C), applies pushing force on the moveable body (2), and thus forces the button (C) to assume the released position (D), and at least one position identifier (6) which limits the movement of the moveable body in concealed position (E),

• which is in contact with the resilient element (4) such that the resilient element (4) will apply a pressure thereon and positioned in the stationary body (3) such that it will form an angle with the central axis of the stationary body (3),

which is oriented with respect to the geometric structure of the barrier (2.1.4) disposed in the moveable body (2) when the first pressing force is applied on the button (C) which is in the released position (D) in order that it will assume the concealed position (E),

which limits the movement of the moveable body (2) by contacting with the barrier (2.1.4) in a position in which the moveable body (2) advances along the central axis of the stationary body (3), and which is released from the barrier (2.1.4) by returning to its angled position with respect to the central axis of the stationary body (3) upon applying the second pressing force thereon, and thus enables the moveable body (2) to assume the released position (D) again.

The movement control mechanism (1) in an embodiment of the invention generally consists of a moveable body (2), a stationary body (3), a resilient element (4), a retaining element (5), and a position identifier (6). The moveable body (2) in this embodiment of the invention is mounted in the button (C). The moveable body (2) consists of two different portions: the main portion (2.1) and the connection portion (2.2). Said main portion (2.1) and connection portion (2.2) have a cylindrical geometry and a flat surface (2.1.2) exists at one side of the main portion (2.1). In addition to this, the main portion (2.1) and the connection portion (2.2) are hollow. The main portion (2.1) disposed in the moveable body (2) constitutes the principal structure of the moveable body (2). The connection portion (2.2), on the other hand, constitutes the portion of the button (C) which is mounted in the moveable body (2). The main portion (2.1) arranged on the moveable body (2) is provided thereon with one or more guide openings (2.1.1). Said guide openings (2.1.1) are made on the main portion (2.1) in order that the moveable body (2) can move along the central axis of the stationary body (3) without any deviation. The guide opening (2.1.1) disposed in the main portion (2.1) is made through the whole length of the main portion (2.1) along the central axis of the moveable body (2). Apart from the guide opening (2.1.1), the main portion (2.1) is also provided with a flat surface (2.1.2). Said flat surface (2.1.2) is formed so that the moveable body (2) as well as the stationary body (3) will not rotate around their own axes. Also provided in the main portion (2.1) is a guide protrusion (2.1.3) so as to enable the moveable body (2) to perform its unidirectional forward and backward movement in a perfect manner. The guide protrusion (2.1.3) is formed along the main portion (2.1) such that it will be parallel to the central axis of the moveable body (2) in the inner portion of the main portion (2.1). Hence, no deviation occurs during the forward and backward movement of the moveable body (2) along the central axis of the stationary body (3). In addition to these, the moveable body (2) is provided with a barrier (2.1.4). Said barrier (2.1.4) is provided preferably in the inner portion of the moveable body (2), at the side of the main portion (2.1) close to the connection portion (2.2). The barrier (2.1.4) is formed on the moveable body (2) so that the movement of the moveable body (2) is limited when the former is in contact with the position identifier (6) mounted in the stationary body (3). The barrier (2.1.4) is designed in a movement-limiting configuration and consists of an orienting block (2.1.4.1) and a retaining block (2.1.4.3). There are more than one orienting surfaces (2.1.4.2) on the orienting block (2.1.4.1) arranged in the barrier (2.1.4). Said orienting surfaces (2.1.4.2) are designed such that they will guide the movement of the position identifier (6) and positioned within the moveable body (2) as such. The barrier (2.1.4) is provided, apart from the orienting block (2.1.4.1), with a retaining block (2.1.4.3). Said retaining block (2.1.4.3) comprises a guide surface (2.1.4.4) which guides the position identifier (6) while the moveable body (2) proceeds from the released position (D) to the concealed position (E); a retaining surface (2.1.4.5) and a seating surface (2.1.4.6) which serve as a bearing for the position identifier (6) during locking operation; and at the same time a rotating surface (2.1.4.7) which directs the position identifier (6) while the moveable body (2) proceeds from the concealed position (E) to the released position (D). Additionally, an interval (2.1.4.8) is formed in the barrier (2.1.4) between the orienting block (2.1.4.1) and the retaining block (2.1.4.3). The locking protrusion (6.3) disposed in the position identifier (6) advances in said interval (2.1.4.8). The connection portion (2.2) arranged in the moveable body (2), on the other hand, is the portion by which the moveable body (2) is mounted in the button (C) as explained above, wherein the area of said connection portion (2.2) contacting with the button (C) is provided with a vertical seating groove (2.2.1) and a horizontal seating groove (2.2.2). Said vertical seating groove (2.2.1) and horizontal seating groove (2.2.2) are made in order to ensure that the button (C) stably remains in its position subsequent to the mounting of said button (C). In this embodiment of the invention, the connection portion (2.2) is provided with one vertical seating groove (2.2.1) and more than one horizontal seating grooves (2.2.2) which intersect said vertical seating groove (2.2.1) perpendicularly and which are disposed in parallel to the central axis of the moveable body (2). In addition to the vertical seating groove (2.2.1) and the horizontal seating groove (2.2.2), there is also a resilient element protrusion (2.2.3) in the inner portion of the connection portion (2.2). Said resilient element protrusion (2.2.3) is formed in the connection portion (2.2) in order to limit the movement of one end of the resilient element (4). The resilient element (4) fits in said resilient element protrusion (2.2.3), and thus limiting the movement thereof within the connection portion (2.2).

The movement control mechanism (1) is provided with a stationary body (3) which serves as a bearing for the moveable body (2) and enables the moveable body (2) to move in a given direction and in reverse direction thereto during the process in which the button (C) switches from the released position (D) to the concealed position (E) and also during the process in which the button switches from the concealed position (E) to the released position (D). Similar to the moveable body (2), the stationary body (3) also consists of a seating portion (3.1) and a guide portion (3.2). The seating portion (3.1) disposed in the stationary body (3) preferably has a D-shaped geometry and is provided in the middle portion thereof with a resilient element clearance (3.1.1). A resilient element (4) which is provided between the moveable body (2) and the stationary body (3) is introduced into said resilient element clearance (3.1.1). There exist at least two blocking extensions (3.1.2) in vertical position and at an equal distance to the central axis of the resilient element clearance (3.1.1), at the end of the resilient element clearance (3.1.1) which is close to the guide portion (3.2). Said blocking extensions (3.1.2) support the position identifier (6) to be in contact with the resilient element (4) and at the same time the position identifier (6) to remain in the preferred position. A hole (3.1.3) is made on the stationary body (3) in an axis passing through the center of the blocking extensions (3.1.2). The orientating extension (6.1) disposed in the position identifier (6) is passed through said hole (3.1.3). The guide portion (3.2) disposed in the stationary body (3) comprises a guide extension (3.2.1), a guide groove (3.2.2), a connection clearance (3.2.3), and also a retaining element clearance (3.2.3.1). The guide extension (3.2.1) disposed in the guide portion (3.2) is preferably formed at the side of the guide portion (3.2) close to the seating portion (3.1) and is preferably two in number. Said guide extensions (3.2.1) are fitted in the guide opening (2.1.1) provided in the moveable body (2) and serve as a guide for the moveable body (2) during the process in which the moveable body (2) is slid on the stationary body (3), thereby preventing the moveable body (2) from deviating from its route. The guide portion (3.2) is provided, in addition to the guide extension (3.2.1), with a guide groove (3.2.2). Said guide grooves (3.2.2), on the other hand, are made along the guide portion (3.2) such that they will be parallel to the central axis of the stationary body (3). The guide protrusion (2.1.3) disposed in the moveable body (2) is fitted in the guide groove (3.2.2) and similarly, the guide groove (3.2.2) and the guide protrusion (2.1.3) prevent the moveable body (2) from deviating its route while it slides on the stationary body (3). Also provided in the guide portion (3.2) is a connection clearance (3.2.3). Said guide connection clearance (3.2.3) preferably has a D-shaped geometry and it is made such that it will be parallel to the central axis of the stationary body (3). The shaft (A) of the appliance to be operated is placed in the connection clearance (3.2.3); thus, the stationary body (3) is fixed in the control panel (B). At one side of the connection clearance (3.2.3) is a retaining element clearance (3.2.3.1). A retaining element (5) is fitted in the retaining element clearance (3.2.3.1). The retaining element (5) preferably has a spring geometry and is of a flexible metal. The retaining element (5) is placed in the retaining element clearance (3.2.3.1) such that its elevated middle portion will face the side of the connection clearance (3.2.3), and being fitted therein. While the stationary body (3) is being placed in the connection clearance (3.2.3), the retaining element (5) slightly bends and applies a continuous friction force on the shaft (A) of the appliance to be operated, whereby it prevents the stationary body (3) from being displaced from its position. The movement control mechanism (1) is further equipped with a position identifier (6) which, during the movement of the moveable body (2) on the stationary body (3), controls such movement of the moveable body (2) and stops the same at preferred stages. The position identifier (6) typically consists of an orientating extension (6.1) and a locking extension (6.2). The orientating extension (6.1) disposed in the position identifier (6) is passed through the hole (3.1.3) and located between the blocking extensions (3.1.2). In the case when the orientating extension (6.1) is located between the blocking extensions (3.1.2), the orientating extension (6.1) is provided at one side thereof with the stationary body (3), and with the blocking extensions (3.1.2) at two opposite sides. The orientating extension (6.1) is in contact with the resilient element (4) through its other edge. The resilient element (4) is engaged with the orientating extension (6.1) through said edge and applies pressing force thereon. The orientating extension (6.1) disposed in the position identifier (6) is provided with an inclined surface (6.1.1). Said inclined surface (6.1.1) is arranged at the portion of the orientating extension (6.1) which contacts with the stationary body (3). In this case, the inclined surface (6.1.1) and the stationary body (3) is in surface-to-surface contact with one another when the resilient element (4) contacts with the orientating extension (6.1) and applies pressure thereon. The angle of said inclined surface (6.1.1) with a proximate edge of the locking extension (6.2) is preferably 10 degrees. In this case, a given angle is formed between the axis passing through the center of the locking extension (6.2) and the axis passing through the center of the stationary body (3) when the orientating extension (6.1) is passed through the hole (3.1.3) and the inclined surface (6.1.1) and the stationary body (3) become in surface-to- surface contact with one another. In this embodiment of the invention, this angle which varies based on the angle of the inclined surface (6.1.1) is preferably 10 degrees. The position identifier (6) is provided, apart from the orientating extension (6.1), with a locking extension (6.2). The angle between the orientating extension (6.1) and the locking extension (6.2) is preferably 90 degrees. The locking extension (6.2) extends along a certain distance, preferably at 90 degrees, starting from one end of the orientating extension (6.1). The opposite surface of the locking extension (6.2) which is devoid of the orientating extension (6.1) is provided with a locking protrusion (6.3) and a support protrusion (6.4). The central axis of the support protrusion (6.4) and the central axis of the orientating extension (6.1), both of which are disposed in the position identifier (6), coincide. The support protrusion (6.4) is slightly elevated from the related surface of the locking extension (6.2). The support protrusion (6.4) preferably has a circular form. The locking extension (6.2) is provided, apart from the support protrusion (6.4), with a locking protrusion (6.3). Said locking protrusion (6.3), on the other hand, becomes in contact with the barrier (2.1.4) and in this way prevents the movement of the moveable body (2). The locking protrusion (6.3) in this embodiment of the invention preferably has a square geometry and it is located at the other end of the locking extension (6.2) which is devoid of the support protrusion (6.4); moreover, its height is the same as the support protrusion (6.4).

The mounting and operating of the movement control mechanism (1) are performed as explained below. First, the resilient element (4) is passed through the resilient element clearance (3.1.1) disposed in the stationary body (3) in order that the moveable body (2), the stationary body (3), the resilient element (4), the retaining element (5) and the position identifier (6) can form the movement control mechanism (1) as a whole, and then the other end of the resilient element (4) which is not passed through the resilient element clearance (3.1.1) is fitted in the resilient element protrusion (2.2.3) disposed in the moveable body (2). Additionally, the position identifier (6) is seated in the hole (3.1.3) over the orientating extension (6.1). Subsequent to locating the position identifier (6) and the resilient element (4), the moveable body (2) is subject to a force in a direction to compress the resilient element (4) and in parallel to the central axis of the stationary body (3) and as a result of this preliminary force, the guide extension (3.2.1) disposed in the stationary body (3) is fitted in the guide opening (2.1.1) provided in the moveable body (2), and the movement control mechanism (1) assumes the released position (D) in this case. In continuation of embodying the movement control mechanism (1) as a whole, the shaft (A) of the appliance to be operated is passed through the connection clearance (3.2.3) disposed in the stationary body (3), and thus achieving the connection of the movement control mechanism (1) to the control panel (B). Afterwards, the button (C) is passed through the connection portion (2.2) of the moveable body (2); thus, the button (C) and the movement control mechanism (1) are interconnected. Henceforth, the movement control mechanism (1) becomes fully operational, being ready to switch from the released position (D) to the concealed position (E), and from the concealed position (E) to the released position (D). In case a pressing force is applied on the button (C) when the movement control mechanism (1) is in this state, the moveable body (2) moves along with the button (C) in compression direction of the resilient element (4) along the central axis of the stationary body (3) since the moveable body (2) and the button (C) are interconnected. During this movement, the barrier (2.1.4) also advances towards the position identifier (6) together with the moveable body (2). Henceforward, first the locking protrusion (6.3) contacts with the guide surface (2.1.4.4) arranged in the retaining block (2.1.4.3) and rotates the position identifier (6) around the axis passing through the center of the orientating extension (6.1) based on the geometry of the guide surface (2.1.4.4) (Fig. 18). This movement continues until the end of the guide surface (2.1.4.4) (Fig. 19). Since an inclined surface (6.1.1) is provided in the orientating extension (6.1) at the end of the guide surface (2.1.4.4), the position identifier (6) tends to rotate towards the interval (2.1.4.8), in which case the locking protrusion (6.3) advances in the interval (2.1.4.8) by following the orienting surface (2.1.4.2) and properly fits in the retaining surface (2.1.4.5) and the seating surface (2.1.4.6) (Fig. 20). At this moment, the moveable body (2) cannot move even if the pressing force applied on the button (C) is removed due to the fact that the locking protrusion (6.3) which is disposed in the position identifier (6) is engaged in the retaining surface (2.1.4.5) and the seating surface (2.1.4.6). This is defined as the button (C) switching from the released position (D) to the concealed position (E). While the moveable body (2) is in the concealed position (E) as such, only the pushing force applied by the resilient element (4) is present on the moveable body (2). Said pushing force, on the other hand, is neutralized since the locking protrusion (6.3) is engaged in the retaining block (2.1.4.3) and in this case, the moveable body (2) cannot move. Henceforth, another pressing force is applied on the button (C) when the button (C) is preferred to be switched from the concealed position (E) to the released position (D) again. In this case, the locking protrusion (6.3) is first released from the retaining surface (2.1.4.5) and the seating surface (2.1.4.6), and thus the interval (2.1.4.8) becoming free. In the meantime, the position identifier (6) tends to rotate in the direction of the rotating surface (2.1.4.7) of the retaining block (2.1.4.3) due to the inclined surface (6.1.1) and moves through the interval (2.1.4.8), and after some time it is released from inside the interval (2.1.4.8) (Fig. 21). The moment the locking protrusion (6.3) is released from the interval (2.1.4.8) is the maximum distance that the moveable body (2) can move in the compression direction of the resilient element (4) along the stationary body (3). In other words, the moveable body (2) cannot move further on the stationary body (3). Henceforward, when the pressing force on the button (C) is removed, the resilient element (4) is activated and forces the moveable body (2) to advance in the direction of the released position (D) from the concealed position (E). Due to such force applied by the resilient element (4), the moveable body (2), and thus the barrier (2.1.4) moves in the similar direction and the locking protrusion (6.3) contacts with the rotating surface (2.1.4.7) (Fig. 22). After some time, the engagement of the position identifier (6) with the barrier (2.1.4) is terminated completely, and thereafter the movement of the moveable body (2) continues until the stroke of the guide opening (2.1.1). In the latter case, the button (C) assumes the released position (D) again leaving the concealed position (E).