EP3912179B1 - Push-button arrangement with identification of a switching state - Google Patents

Description

The invention relates to a push-button switch arrangement in which different switching states are visibly marked depending on a switch position.

For certain pushbutton switch arrangements, a standard requires that different switching states of the pushbutton switch arrangement be clearly visible to a viewer. The pushbutton switch arrangement is designed, for example, as an emergency stop switch with which an electrical contact between two conductors can be separated. A pushbutton switch arrangement of this type usually has various components, which are designed according to a modular system, as described, for example, in the publication EP 1 261 979 B1 is described, are composed. The components of a pushbutton switch arrangement include, for example, a substantially mushroom-shaped actuation head which is placed on a key guide. The key guide is designed, for example, as a hollow body and has, for example, a plunger in its interior, which is displaceable in the key guide in the axial direction by means of the actuating head.

Such a push-button arrangement is mounted, for example, on a housing body which has a contact element inside. When the actuating head is pressed or twisted, the plunger inside the key guide is moved. The plunger acts on the contact element inside the housing body, so that an electrical contact is separated, for example. It is there required to mark the switching state of the pushbutton switch arrangement reliably and clearly visible from the outside.

The publication EP 1734434 A1 discloses an emergency stop switch having a tubular body that receives a tubular member which is displaced in axial displacement. The emergency stop switch further includes a blocking unit that cooperates with indexing slots in exit and re-entry positions. The blocking unit is integrated into the tubular body and has an elastomeric material and is therefore designed to be partially elastically deformable.

The revelation of the pamphlet DE 102009007854 A1 relates to a command device with a backlit handle and a flexible light guide for directing a light generated by a light source to the handle, for backlighting the handle.

The publication US 4314124 A discloses a push-button circuit breaker having a contact function and a locking function. Locking means are provided on a confirmation element and interact with cam surfaces in a guide cylinder of the circuit breaker. Various cam surfaces in the guide cylinder are offset from one another and can be brought into operational connection with the locking means.

It is an aim of the present invention to provide a pushbutton switch arrangement that can be produced with little manufacturing effort, enables a reliable setting of a switching state and for has different switching states that can be clearly recognized by an operator.

A pushbutton switch arrangement with identification of a switching state is specified in independent claim 1. Advantageous embodiments are specified in the dependent patent claims.

A pushbutton switch arrangement with identification of a switching state comprises an actuating head for actuating the pushbutton switch arrangement with a disk-shaped upper part and a tubular lower part. The pushbutton switch arrangement further comprises a sleeve-shaped key guide, which is coupled to the actuating head, so that, relative to a longitudinal axis of the pushbutton switch arrangement, the upper part is arranged above the key guide and the lower part surrounds the key guide. The pushbutton switch arrangement further has a sleeve-shaped locking unit for determining a switching state of the pushbutton switch arrangement, which is arranged within the key guide with respect to the longitudinal axis and which can be moved between a first and a second locking state by means of the actuating head, the locking unit having a plunger sleeve and comprises an annular locking bar coupled to the plunger sleeve, which delimits a central through opening predetermined by the locking unit along the longitudinal axis. The locking bar is designed in several parts and has a first locking locking element and a second locking locking element, which are prestressed by means of two spring elements, which drive the locking locking elements outwards with respect to the longitudinal axis. The pushbutton switch assembly also includes a light guide for guiding light, which is coupled to the actuation head so that Based on the longitudinal axis, the light guide is arranged at least in sections within the actuation head and within the key guide. The light guide extends with respect to the longitudinal axis with a head end at a predetermined position through the actuating head and with a foot end through the passage opening of the locking unit, so that by means of a light radiation that can be coupled into the light guide at the foot end and the pushbutton switch arrangement can be illuminated as specified.

Using the push-button switch arrangement described, a switching state can be reliably set up and displayed clearly for an operator. The central passage opening through the locking unit in particular enables unhindered passage of light or light radiation. In particular, when using a lighting unit that can be attached to the pushbutton switch arrangement, a useful lighting function of the pushbutton switch arrangement can be made possible. The pushbutton switch arrangement can thus be clearly visible from the outside at one or more predetermined positions. The light radiation can reach the actuating head barrier-free or unhindered along the central longitudinal axis, on which, for example, through openings or a glass window are provided, through which at least part of the light radiation can emerge.

The free passage opening through the locking unit also enables the installation of a light guide, for example in the form of a light-guiding glass or polycarbonate rod, which extends through the locking unit to the lamp unit and to a can contribute to the particularly clearly visible light or light function of the push-button switch arrangement. In addition to conventional color coding, such a light function implements a light indicator and contributes to simple and reliable identification of a respective switching state of the push-button switch arrangement.

The central passage opening of the locking unit is free of spring elements or other components of the push-button switch arrangement and thus forms a section of an internal air or light duct that is unhindered by light radiation. The sleeve-shaped or tubular locking unit, in conjunction with a light-guiding lighting function, therefore enables the push-button switch arrangement and a respective switching state to be clearly identified.

According to a preferred development of the push-button switch arrangement, the locking bar of the locking unit has a locking element on an outside and is biased by means of a spring element, which drives the locking bar and the locking element outwards away from the longitudinal axis in relation to the central longitudinal axis. Such a design of the locking unit has a simple and cost-effective structure and also contributes to secure and reliable locking of a respective switching state. The locking element cooperates in particular with adjacent guide tracks and/or recesses, which enable a controlled movement of the locking element when the actuating head is actuated. Furthermore, the guide tracks and/or recesses enable a guided and reliable snapping or fixing of the Locking element. Recesses into which the locking element snaps are provided, for example, as immersion openings on the inside of the key guide. Alternatively, the locking unit is surrounded by a further sleeve-shaped plunger, which has guide tracks and latching openings and interacts with the locking unit to determine a switching state of the pushbutton switch arrangement.

The respective locking bar elements are preferably geometrically identical, in particular symmetrical, and have, for example, a semicircular or crescent-shaped structure. The locking locking elements are arranged, for example, within the annular plunger sleeve, with the spring elements at the respective end sections of the locking locking elements being clamped between the locking locking elements and pressing the locking locking elements outwards with respect to the central longitudinal axis.

According to a further development of the push-button switch arrangement, the locking locking elements each have a locking element on one outside. The respective locking element can, for example, be arranged at a central region of a crescent-shaped locking bolt element and extend outwards with respect to the central longitudinal axis. Preferably, the locking locking element and the associated locking element are formed in one piece.

According to a further development of the push-button switch arrangement, the respective locking element is bolt-shaped with a rounded end which faces away from the central through opening. Such a shape of the locking element enables low-friction guidance and Intervene within designated guideways and recesses. In addition, the locking element can also be designed to be angular or angular and, for example, have a cuboid square structure with bevels, which enable low-friction guidance and reliable locking of the respective switching state.

According to a further development of the pushbutton switch arrangement, the locking bar is arranged within the plunger sleeve with respect to the longitudinal axis, so that the respective locking element extends through an opening in a wall of the plunger sleeve.

According to a further preferred development of the push-button switch arrangement, the plunger sleeve and/or the locking bolt have guide elements by means of which the locking bolt can be moved in a guided manner relative to the plunger sleeve. For example, raised elongated guide structures are provided on an inside of the wall of the tappet sleeve and/or on a bottom of the tappet sleeve, which engage in corresponding grooves on the locking bar and predetermine a movement of the locking bar along the guide structures due to an acting spring force.

According to a further particularly preferred development, the pushbutton switch arrangement has a light guide for guiding light, which is coupled to the actuation head, so that, based on the longitudinal axis, the light guide is arranged at least in sections within the actuation head and within the key guide. The actuating head is, for example, mushroom-shaped. The light guide extends with respect to the longitudinal axis head-side end at a predetermined position through the actuating head and with a foot-side end through the passage opening of the locking unit, so that the push-button switch arrangement can be illuminated in a predetermined manner by means of a light radiation which can be coupled into the light guide at the foot-side end.

Preferably, the pushbutton switch arrangement further comprises a lighting unit with a light-emitting diode which, relative to the longitudinal axis, is coupled to the key guide at an end opposite the actuation head below the locking unit, so that light radiation from the light-emitting diode can be emitted through the passage opening of the locking unit in the direction of the actuation head without blockage .

The special design of the locking unit described provides a central free space that can be used for the unhindered passage of light radiation. In particular, the central free space can be used to guide and accommodate a light guide, so that a particularly advantageous light guide function and illumination of the pushbutton switch arrangement is contributed.

The pushbutton switch arrangement can be switched in particular from a non-triggered state to a triggered state by actuating the actuating head, the pushbutton switch arrangement being designed in such a way that, in the triggered state, an electrical contact between two conductors of a contact element that can be coupled to the pushbutton switch arrangement can be separated is when the contact element is designed as a normally closed contact and the electrical contact between the two conductors is closed in the non-triggered state is. The pushbutton switch arrangement is designed in such a way that in the triggered state an electrical contact between two conductors in the contact element can be closed if the contact element is designed as a normally open contact and the electrical contact between the two conductors is separated in the non-triggered state.

The pushbutton switch arrangement can be actuated by pressing and/or rotating the actuating head and the first or second locking state of the locking unit can thereby be set. For example, a locking element in the form of a pin-shaped bolt with a spherical head engages in an opening of an adjacent guide sleeve and forms the first locking state, which represents a non-triggered circuit state of the pushbutton switch arrangement. By pressing and/or rotating, the locking element is moved out of the recess or opening, moved along a predetermined control path until it engages in a further recess or opening and thus forms the second locking state, which represents, for example, a triggered circuit state of the pushbutton switch arrangement.

According to a preferred development, the pushbutton switch arrangement is designed as an emergency stop switch or as a stop switch and, by means of the specially designed locking unit and the preferably provided light guide, enables a particularly reliable and clearly recognizable display of a switching state and thus contributes to safety.

In addition, the key switch arrangement can include an adapter device for attaching the key switch arrangement to a housing body, which is coupled to the key guide and which enables attachment to insert openings of different sizes.

Figur 1

eine Ausführungsform einer TastschalterAnordnung mit einem Lichtleiter;

Figuren 2A-2C

verschiedene Querschnittdarstellungen der Tastschalter-Anordnung nach Figur 1;

Figuren 3A-3E

eine Ausführungsform einer Verriegelungseinheit für die TastschalterAnordnung nach Figur 1;

The invention is explained in more detail below with reference to figures which show exemplary embodiments of the push-button switch arrangement. They each show in a schematic representation:

Figure 1

an embodiment of a pushbutton switch arrangement with a light guide;

Figures 2A-2C

various cross-sectional representations of the pushbutton switch arrangement Figure 1 ;

Figures 3A-3E

an embodiment of a locking unit for the pushbutton switch arrangement Figure 1 ;

Elements of the same construction and function are marked with the same reference numerals across the figures. For reasons of clarity, not all elements shown in all figures may be marked with associated reference symbols.

Figure 1 shows an embodiment of a pushbutton switch arrangement 1 according to the invention with identification of a switching state. The pushbutton switch arrangement 1 has a mushroom-shaped actuation head 10 for actuating the pushbutton switch arrangement 1, which comprises a disk-shaped upper part 11 and a tubular lower part 12. The The key switch arrangement 1 also has a key guide 20. The key guide 20 is coupled to the actuation head 10 and is arranged in the lower part 12 of the actuation head 10 with respect to a longitudinal axis L of the key switch arrangement 1, so that the lower part 12 surrounds the key guide 20. The upper part 11 is arranged above the key guide 20 with respect to the longitudinal axis L.

The pushbutton switch arrangement 1 further has a sleeve-shaped locking unit 60 for determining a switching state of the pushbutton switch arrangement 1, which is arranged within the key guide 20 with respect to the longitudinal axis L and which can be transferred between a first and a second locking state by means of the actuating head 10. The locking unit 60 comprises a plunger sleeve 62 and an annular locking bar 61 coupled to the plunger sleeve 62, which delimit a central through opening 68 predetermined by the locking unit along the longitudinal axis L (cf. Figure 3A ).

The free passage opening 68 of the locking unit 60 enables the installation of a light guide 40, which extends through the locking unit 60 and can contribute to a particularly advantageous light-guiding function and clearly recognizable illumination of the push-button switch arrangement 1. Such a light function implements a light indicator in addition to conventional color markings and contributes to a simple and reliable identification of a respective switching state of the push-button switch arrangement 1. The central passage opening 68 of the locking unit 60 is free of spring elements or other components of the push-button switch arrangement 1 and thus forms an obstruction-free area for light radiation passage. This is made possible by the sleeve- or tubular design of the locking unit 60.

The push-button switch arrangement 1 further comprises the light guide 40 for guiding light, which is coupled to the actuation head 10, so that, based on the longitudinal axis L, the light guide 40 is arranged in sections within the actuation head 10 and within the key guide 20. The light guide 40 extends with a head-side end 47 at a predetermined position through the actuating head 10, so that the push-button switch can be coupled into the light guide 40 by means of a light radiation which, based on the longitudinal axis L, can be coupled into the light guide 40 at a foot-side end 48 opposite the head-side end 47. Arrangement 1 can be illuminated as specified.

The light guide 40 is designed in two parts and has a first component with a rod-shaped element 41 and a funnel-shaped element 42 adjacent to it. A separate second component is formed by a disc-shaped element 43 which has a projecting region 45 which extends through a central opening in the upper part 11 of the actuation head 10. The light guide 40 also extends outwards between the upper part 11 and the lower part 12 through the actuating head 10 and is therefore arranged circumferentially between the upper part 11 and the lower part 12.

The components of the pushbutton switch arrangement 1 shown are predominantly rotationally symmetrical with respect to the longitudinal axis L.

The pushbutton switch arrangement 1 also has a sleeve-shaped plunger 24, which surrounds the light guide 40 with respect to the longitudinal axis L and also extends through the through opening 68 of the locking unit 60. The sleeve-shaped plunger 24 serves, among other things, to transmit force when actuating the actuating head 10 to other components of the pushbutton switch arrangement 1, such as the locking unit 60, and is arranged with respect to the longitudinal axis L between the actuating head 10 or the key guide 20 and the light guide 40. In addition, the plunger 24 can serve as a holding and coupling component for the light guide 40. The plunger 24 reshapes the contour of the light guide 40 or the first component 41, 42 of the light guide 40 and couples the light guide 40 to the actuating head 10 and the key guide 20.

The pushbutton switch arrangement 1 further has a lighting unit 50 with a light-emitting diode 51, which is coupled to the key guide 20 by means of a coupling sleeve 26 at an end opposite the actuating head 10 in relation to the longitudinal axis L, so that light radiation from the light-emitting diode 51 at the foot-side end 48 of the light guide 40 can be coupled into the light guide 40. Emitted light radiation from the light-emitting diode 51 enters the light guide 40 in the direction of the light guide 40, is guided therein and coupled out of the light guide 40 at the peripheral edge of the funnel-shaped element 42 and the projecting region 45 of the disc-shaped element 43 and thus provides clearly visible illumination of the light guide 40 Button switch arrangement 1 ready, which contributes to the safe location and identification of the button switch arrangement 1.

In addition, one or more spring elements 22 are illustrated, which bias the pushbutton switch arrangement 1 or components of the pushbutton switch arrangement 1 adjacent to the spring elements 22. In this way, a basic state of the push-button switch arrangement 1 can be set up, which can be converted into a switching state by pressing and/or rotating. The pushbutton switch arrangement 1 can be switched from a non-triggered state to a triggered state by actuating the actuating head 10, for example, the pushbutton switch arrangement 1 being designed in such a way that in the triggered state there is an electrical contact between two conductors of one with the pushbutton switch. Arrangement 1 connectable contact element can be separated if the contact element is designed as a normally closed contact and the electrical contact between the two conductors is closed in the non-triggered state. The pushbutton switch arrangement 1 implements, for example, an emergency stop switch or a stop switch and, by means of the specially designed locking unit 60 and the light guide 40, enables a particularly reliable setup and clearly recognizable display of a switching state and thus contributes to safety.

Furthermore, the pushbutton switch arrangement 1 includes an annular adapter device 30 for attaching the pushbutton switch arrangement 1 to a housing body. According to standard specifications, individual components of the push-button switch arrangement 1 have specified color designs. With regard to an emergency stop switch, the key guide 20 has a green colored material, in particular a solid colored plastic, the color of which differs significantly from a red color of the actuating head 10 and a yellow color of the adapter device 30.

The Figures 2A to 2C illustrate various views of the pushbutton switch arrangement 1 from below in the direction of the actuating head 10. In Figure 2A Among other things, the central arrangement of the light guide 40 within the key guide 20 and the adapter device 30 can be seen. In addition, the light guide 40 is surrounded by an adapter centering 29. The adapter centering 29 interacts, among other things, with a locking element 31 of the adapter device 30, which forms anti-rotation protection for the adapter device 30.

Figure 2B shows a representation of the push-button switch arrangement 1 with a view of the locking unit 60 without the light guide 40. Based on this representation it can be seen that the described embodiment of the locking unit 60 has or limits a centrally designed free passage opening 68 and thus an unhindered passage of light centrally along the longitudinal axis L is possible. Light preferably passes through the centrally arranged light guide 40, which, due to the special design of the locking unit 60, extends through the passage opening 68 to the

Lamp unit 50 can extend. A certain freedom of movement of the light guide 40 along the longitudinal axis L must be taken into account due to the actuation of the push-button switch arrangement 1 by pressing the actuation head 10.

Figure 2C shows a perspective sectional view along a plane transverse to the longitudinal axis L through the adapter device 30 and the locking unit 60. The locking unit 60 has two locking elements 69, each in the shape of a rounded one Bolt, which are arranged on opposite sides of the locking bolt 61 with respect to the longitudinal axis L. According to this embodiment, the locking elements 69 are hollow or sleeve-shaped and formed in one piece with sickle-shaped locking locking elements 611, 612.

The Figures 3A to 3E show the locking unit 60 in different views. The Figures 3A and 3B show the locking unit 60 in a respective perspective view. The Figures 3C to 3E show sectional views of the locking unit 60. The locking unit 60 has the plunger sleeve 62, within which the two-part locking bolt 61 is arranged. The locking bar 61 includes the first and second locking bar elements 611 and 612, which are biased by two spring elements 65, 66, which push the locking bar elements 611 and 612 outwards away from the central longitudinal axis L. The respective locking elements 69 are, for example, designed as solid bolt-shaped elements in one piece with the respective locking locking element 611, 612 and extend outwards through a wall of the plunger sleeve 62. The plunger sleeve 62 also has grooves or recesses that enable stable locking and secure coupling with surrounding components of the pushbutton switch arrangement 1. The plunger sleeve 62 is coupled to the key guide 20 by means of a guide ring 28 (see Fig. Figure 1 ). In addition, the plunger sleeve 62 and the locking bar 61 or the locking locking elements 611 and 612 have guide elements by means of which the locking locking elements 611, 612 can be moved in a guided manner relative to the plunger sleeve 62. There are raised elongated guide structures on a bottom of the plunger sleeve 62 provided, which engage in corresponding grooves on the locking locking elements 611, 612 and specify a movement of the locking locking elements 611, 612 along the guide structures.

Figure 3C shows a cross section of the pushbutton switch arrangement 1 at the level of the locking unit 60, which represents, for example, a first locking setting or basic setting. The locking elements 69, driven by the spring forces of the spring elements 65, 66, engage in provided recesses. In comparison, in Figure 3D a movement of the locking unit 60 or the locking locking elements 611, 612 is indicated, as initiated by a turning and / or pressing process on the actuating head 10. The locking elements 69 remove themselves from the respective recesses and are moved in the direction of the central longitudinal axis L against the acting spring forces. When the turning and/or pressing process is continued, the locking elements 69 are rotated, for example, radially about the longitudinal axis until they engage in further recesses provided for this purpose and form a second locking state of the locking unit 60 and switching state of the push-button switch arrangement 1. According to the Figures 3C and 3D In the exemplary embodiment shown, a clockwise rotation can take place until the locking elements engage in adjacent recesses in the guide ring 28.

Figure 3E shows a cross section of the locking unit 60 in a triggered or actuated state of the pushbutton switch arrangement 1, which also shows a rounded contour of the recesses into which the Bolt-shaped locking elements 69 engage or can engage.

The through opening 68 of the locking unit 60 is also limited, among other things, by the bottom of the plunger sleeve 62 (see Fig. Figures 3A , 3B and 3D ). The limiting contour in the bottom of the plunger sleeve 62 can be designed in particular to match the use of the light guide 40 or the plunger 24 surrounding the light guide 40 in order to ensure reliable guidance through the through opening 68 and a secure hold of the light guide 40 together with the plunger 24 to contribute to the pushbutton switch arrangement 1.

By means of the push-button switch arrangement 1 described, a switching state can be displayed reliably and clearly visible to an operator. The specially designed locking unit 60 and the free space provided for the light guide 40 enable a useful light function of the pushbutton switch arrangement 1. In addition to conventional color coding, a light indicator can thus be implemented and can contribute to particularly reliable identification of a respective switching state.

Reference symbol list

1

Push button arrangement

10

Actuating head

11

Upper part of the actuating head

12

Lower part of the actuating head

20

Key guidance of the pushbutton switch arrangement

22

Spring element

24

sleeve-shaped pestle

25

Sealing element

26

Coupling sleeve

28

sleeve-shaped guide ring

29

Adapter centering

30

Adapter device for the pushbutton switch arrangement

31

Locking element of the adapter device

40

light guide

41

rod-shaped element of the light guide

42

funnel-shaped element of the light guide

43

disc-shaped element of the light guide

45

projecting area of the disc-shaped element

46

Light guide cavity

47

head end of the light guide

48

foot end of the light guide

50

Light unit

51

LED of the lighting unit

60

Locking unit

61

Latch of the locking unit

611

first locking bolt element

612

second locking bolt element

62

Tappet sleeve

65

first spring element of the locking unit

66

second spring element of the locking unit

68

Through opening of the locking unit

69

locking bolt

Claims (8)

1. Push-button switch assembly (1) having means for indicating a switch status, comprising:

   - an actuation head (10) for actuating the push-button switch assembly (1), having a disc-shaped upper part (11) and a tubular lower part (12),

   - a sleeve-shaped push-button guide (20) which is coupled to the actuation head (10) such that, in relation to a central longitudinal axis (L) of the push-button switch assembly (1), the upper part (11) is arranged above the push-button guide (20) and the lower part (12) surrounds the push-button guide (20),

   - a sleeve-shaped locking unit (60) for determining a switch status of the push-button switch assembly (1), which is arranged within the push-button guide (20) in relation to the longitudinal axis (L) and can be transferred between a first and a second locking state by means of the actuation head (10), wherein the locking unit (60) has a plunger sleeve (62) and an annular detent catch (61) coupled to the plunger sleeve (62), which delimit a central through-opening (68) through the locking unit (60) perpendicular to and along the longitudinal axis (L) in a predetermined manner, wherein the detent catch (61) has a multipiece design and a first detent catch element (611) and a second detent catch element (612) which are preloaded by means of two spring elements (65, 66) which, in relation to the longitudinal axis (L), push the detent catch elements (611, 612) outward, and

   - a light guide (40) for guiding light, which is coupled to the actuation head (10) such that, in relation to the longitudinal axis (L), at least portions of the light guide (40) are arranged within the actuation head (10) and within the push-button guide (20), wherein the light guide (40), in relation to the longitudinal axis (L), extends with a top end (47) in a predetermined position through the actuation head (10) and with a bottom end (48), it extends through the through-opening (68) of the locking unit (60) such that the push-button switch assembly (1) can be illuminated in a predetermined manner by means of a light beam that can be coupled into the light guide (40) at the bottom end (48).
2. Push-button switch assembly (1) according to claim 1, in which the detent catch (61) of the locking unit (60) has a locking element (69) on an outer side and is preloaded by means of a spring element (65, 66) which, in relation to the longitudinal axis (L), pushes the detent catch (61) and the locking element (69) outward.
3. Push-button switch assembly (1) according to either claim 1 or claim 2, in which the detent catch elements (611, 612) each have a locking element (69) on an outer side.
4. Push-button switch assembly (1) according to any of claims 2 to 3, in which the relevant locking element (69) is designed to be bolt-shaped with a rounded end facing away from the central through-opening (68).
5. Push-button switch assembly (1) according to any of claims 2 to 4, in which the detent catch (61), in relation to the longitudinal axis (L), is arranged within the plunger sleeve (62) and the relevant locking element (69) extends through an opening in a wall of the plunger sleeve (62).
6. Push-button switch assembly (1) according to any of claims 1 to 5, in which the plunger sleeve (62) and/or the detent catch (61) have guide elements, by means of which the detent catch (61) can be moved in a guided manner relative to the plunger sleeve (62).
7. Push-button switch assembly (1) according to any of claims 1 to 6, comprising:
   a light source unit (50) having a light-emitting diode (51) which, in relation to the longitudinal axis (L), is coupled to the push-button guide (20) below the locking unit (60) at an end opposite the actuation head (20), so that the light beam of the light emitting diode (51) can be emitted unblocked through the through-opening (68) of the locking unit (60) in the direction of the actuation head (10).
8. Push-button switch assembly (1) according to any of claims 1 to 7,

   - which can be switched from a non-released state to a released state by actuating the actuation head (10),

   - wherein the push-button switch assembly (1) is designed such that, in the released state, an electrical contact between two conductors of a contact element, which can be coupled to the push-button switch assembly (1), can be separated if the contact element is designed as an N/C contact and the electrical contact between the two conductors is closed in the non-released state, and

   - wherein the push-button switch assembly (1) is designed such that, in the released state, an electrical contact between two conductors in the contact element can be closed if the contact element is designed as an N/O contact and the electrical contact between the two conductors is separated in the non-released state.

Images