CN105144331A

CN105144331A - Pushbutton switch

Info

Publication number: CN105144331A
Application number: CN201480011136.0A
Authority: CN
Inventors: 米夏尔·什维赫拉
Original assignee: ZF Friedrichshafen AG
Current assignee: ZF Friedrichshafen AG
Priority date: 2013-03-01
Filing date: 2014-02-03
Publication date: 2015-12-09
Anticipated expiration: 2034-02-03
Also published as: CN105144331B; CN105144330A; WO2014131781A1; CN105144330B; WO2014131576A1; DE102013203466A1

Abstract

The invention relates to a pushbutton switch having a pushbutton switch cap (3) which is mounted on a base plate (2) and is composed of an integrally flexible material, wherein the pushbutton switch cap (3) is arranged over a switching region (4) having at least two contact areas, and has a central pressure region (6), a deformation region (7) which surrounds the central pressure region (6) and is connected to said central pressure region, and a sealing region (8) which is connected to the deformation region (7) and is designed to seal off the space (9) which is enclosed by the base plate (2) and the pushbutton switch cap (3) in a media-tight manner, wherein, by exerting a push-down force on the central pressure region (6), said central pressure region can be moved from an inoperative position (11) to an end position (13) in the direction of the base plate (2), and wherein a switching bridge (14) for establishing an electrical connection between the at least two contact areas (5) is provided, and wherein the central pressure region (6) is operatively connected to the switching bridge (14), and the switching bridge (14) can be moved in the direction of a stop (15) which is formed in the switching region (4).

Description

Key switch

Technical field

The present invention relates to a kind of assembly of electromechanics, it such as can be used in the pass door system of vehicle.

Background technology

If need switching function in the assembly of electromechanics, so choose switch and it can be used as independent component to be integrated in the assembly of this electromechanics.

Such electrical contact switch is used in a lot of application as microswitch, switchette or super-small size switch, such as, be used in automotive engineering and family's power technology.In these switches, sliding contact is taken to another contact site with sliding motion by from a contact site.At this, the connection of conduction should only occur on each contact site.

A kind of switch is disclosed by DE3910812C1, especially a kind of instrument switch, it is configured with the contact of at least one activity, this contact can move to on-position by switch controls from off-position, and this contact is also with housing, this housing has at least one accommodation section of corresponding contact for being contacted in its on-position by the contact of activity, and this accommodation section not to load and in order to loading afterwards with there being the contact that can be incorporated into from outside housing.

Disclose a kind of electric sliding contact switch by DE102007048581B3, it is with housing, arranges a common contact and at least one selection contact with contact-making surface in this housing.Be adjacent to arrange a sliding area be made up of the material of electric insulation with selecting the contact-making surface of contact.With common contact be in all the time conduct electricity be connected and there is the contactor of at least one sliding contact, or being in conduct electricity with selection contact is connected, or contact slide region.In addition, the controls that can activate is arranged in the housing as follows, that is, this controls is made to make at least one sliding contact of contactor when handling on slip rail slidably from selecting the contact-making surface of contact to move to sliding area and/or from sliding area out towards the contact-making surface motion selecting contact.Also to be configured with in slip rail when running over sliding area not by region that sliding contact touches.

The defect of known switch is very large space requirement.In addition, known switch is made up of multiple independent component, this means that higher manufacture expends.

By the known a kind of deflating cap for switch of GB2112577A.This deflating cap is made by the rubber type of material of one and is mainly had following areas: the pressure span of central authorities, and its direction towards substrate has projection, this pressure span surrounded by the region of annular and with the joint area of this annular.The joint area of basic ring and this annular, on this basic ring, deflating cap is disposed on the substrate of switch.The region of annular be divided into heavy wall with the region of thin-walled.Rib arrange annular between these regions, that point to towards orientation substrate.The region of heavy wall is between this rib and pressure span of central authorities.The region of thin-walled is between rib and basic ring.When handling the pressure span of central authorities, rib was formed with substrate before this and contacted.When applying further pressure, achieve the buckle process in the region of thin-walled and heavy wall, this buckle process makes rib away from basal plane and makes pressure span and the substrate contacts of central authorities.Flexibly turn back to initial position in order to ensure deflating cap and in order to ensure the air exchange easily between the interior zone and perimeter in the space surrounded by deflating cap, in deflating cap, establish some steam vents.

The defect of this switch is, cannot guarantee reliably to set up electrical connection.In addition, protection against the tide is not had by the space that deflating cap surrounds.

Summary of the invention

Technical problem to be solved by this invention is, creates a kind of switch having very little planform and reliable on off state.

The entirety of the feature of the solution claim 1 of this technical problem reaches.Improvement project of the present invention is the theme of dependent claims.

Next be called as switch by key switch of the present invention, comprise substrate, substrate be provided with the key switch cap being next called as cap.Cap to be made up of the material of unitary flexible at this and to be disposed in above the switch region of at least two contact-making surfaces.Flexible material can be rubber or flexible plastics at this.

Hereinafter, for the housing of one or more electric conductor trace (such as lead frame) or circuit board, be also understood to be substrate, housing has the portion of leaving a blank in switch region.Hereinafter, the face on electric conductor trace or region are also understood to be contact-making surface.

By the cap of switch of the present invention have central authorities pressure span, surround these central authorities pressure span and the deformed region be attached thereto and the sealing area is connected with deformed region, sealing region close with being configured to aeroseal by substrate and cap encirclement space.

Applied to the power pressed down by the pressure span to central authorities, make this center pressure zone be moved into final position towards the direction of substrate from resting position.

According to the present invention, there is connection bridge for setting up the electrical connection between at least two contact-making surfaces, wherein, the pressure span of central authorities according to the present invention with connect during bridge is in and acts on and being connected, wherein, connect bridge to move towards the direction of the backstop be configured in switch region.Connect bridge and be understood to it is not the contact-making surface be connected with the center pressure zone of cap hereinafter clearly.

Connect bridge have in a kind of favourable execution mode to be in the pressure span of the central authorities of cap act on the maneuvering area that is connected with at least one can move on the contact surface, the end section that is configured to sliding contact.

In the execution mode that another kind is favourable, the pressure span of central authorities, by applying to move towards the direction of substrate to the power pressed down, or rather, moves to final position from resting position through on-position.At this, on-position means, is connecting the end section of bridge and is attaching troops to a unit set up electrical contact between the contact-making surface of this end section.In addition, the end section at least enforcement sliding motion on the contact surface when being moved into final position from on-position of bridge is connected.This sliding motion on the contact surface has such advantage, that is, ensure that reliable contacting and issuable oxide layer are on the contact surface worn away.Thus ensure that on the whole supporting surface of end section with the reliable contacting of contact-making surface.

Accompanying drawing explanation

Next the present invention and favourable execution mode of the present invention is explained in detail by accompanying drawing.In accompanying drawing:

Fig. 1 a is the first execution mode by switch of the present invention in resting position;

Fig. 1 b is the first execution mode by switch of the present invention in on-position;

Fig. 1 c is the first execution mode by switch of the present invention in final position;

Fig. 2 a is the second execution mode by switch of the present invention in resting position;

Fig. 2 b is the second execution mode by switch of the present invention in on-position;

Fig. 2 c is the second execution mode by switch of the present invention in final position;

Fig. 3 a is the third execution mode by switch of the present invention in resting position;

Fig. 3 b is the third execution mode by switch of the present invention in on-position;

Fig. 3 c is the third execution mode by switch of the present invention in final position.

All figure illustrate the profile of each execution mode, and wherein, the diagram on the left side illustrates respectively, to the vertical view of section plane and the diagram on the right, corresponding three-dimensional view is shown.

Embodiment

Fig. 1 a to 1c shows the first execution mode by switch of the present invention.In fig 1 a, switch is in resting position 11, is then in on-position 12 in Figure 1b and is in figure 1 c in final position 13.Key switch 1 has substrate 2, substrate is arranged key switch cap 3.Be the below that the switch region 4 of two contact-making surfaces 5 of conductive traces 5 is in cap 3 with form, can electrical connection be set up between conductive traces.

Switch region 4 is the region of substrate 2 substantially, and contact-making surface 5 extends in this region.Can to be such as form be substrate 2 by the component bracket of the electronics of the lead frame of plastics injection encapsulated, and wherein, in switch region 4, lead frame is not injection molding encapsulating.But substrate 2 also can be the housing for circuit board, and wherein, in switch region 4, housing has portion of leaving a blank accordingly.

The object of switch region is restriction region, and key switch 1 should set up the electrical connection between conductive traces 5 in this region.

Cap 3 has the pressure span 6 of central authorities, is applied on the pressure span of these central authorities perpendicular to substrate 2 to the power F pressed down, and cap also has the pressure span and the deformed region 7 be attached thereto and sealing area 8 that surround these central authorities.Deformed region 7 is made up of the material of flexibility worthily at this.Sealing area 8 and substrate 2 connect by bonding connecting portion or laser welding connecting portion in join domain 26.Therefore closed by medium-tight by the space 9 that substrate 2 and cap 3 surround.Therefore, it is possible to guarantee do not have moisture or such as dust invade from outside switch region and thus cause contact-making surface 5 be corroded or make dirty.

Be furnished with between the pressure span 6 and substrate 2 of central authorities and connect bridge 14.This connects bridge 14 for setting up the electrical connection between contact-making surface 5.Connection bridge 14 is form is worthily by the spring element 20 of the flat metal tape of arc pretension.Switch element has operator region 16 and two end section 17.Operator region 16 is in act on the pressure span 6 of the central authorities of cap 3 at this and is connected.End section 17 is bent like this, makes them can implement the sliding motion of the level above substrate 2 and contact-making surface 5.Keep flat on a substrate 2 during this external whole sliding motion of end section 17.In resting position, end section 17 keeps flat on a substrate 2 and between contact-making surface 5, does not set up electrical connection.

Backstop 15 for connecting bridge 14 extends towards the direction of the pressure span 6 of central authorities from substrate 2.This backstop 15 is used as the backstop for the maneuvering area 16 connecting bridge 14 substantially.But be also contemplated that, arrange backstop (not shown) on a substrate 2 in the region of end section 17, this backstop limits the motion of the level of end section 17.

In addition, steering device 19 extends towards the direction of the pressure span 6 of central authorities from substrate 2.This steering device 19 is directed through the portion of leaving a blank 22 be present in the maneuvering area 16 connecting bridge 14 worthily.Steering device 19, for the bridge 14 that is fixedly connected, is particularly useful for the direction along level, that is perpendicular to the force direction F ground maneuvering area 16 of the bridge 14 that is fixedly connected.Fig. 1 a shows a kind of flexible program, and in this flexible program, portion 22 of leaving a blank medially designs in the maneuvering area 16 connecting bridge 14.But also possible that, there is the portion of leaving a blank 22 being used for two steering device 19, wherein, portion 22 of leaving a blank implements on the edge of the maneuvering area 16 connecting bridge 14.

The containment device 21 for steering device 19 is there is in the region of the pressure span 6 of the central authorities of cap 3.These containment devices 21 at least partly, surround steering device 19 (Fig. 1 c) along the whole manipulation section between resting position and final position or rather worthily.Thus ensure that connect bridge 14 implement in the region of maneuvering area 16 perpendicular to substrate 2 and torsion proof motion.Likely rotating about force direction F to prevent connecting bridge 14, in addition can other steering device being set on a substrate 2, all being guided by these steering device during the whole sliding motion of end section 17 between resting position and final position.

In unshowned flexible program, can exist and connect steering device 19 that the maneuvering area 16 of bridge 14 is connected, that extend towards the direction of the pressure span 6 of central authorities.Containment device 21 designs as follows in the pressure span 6 of the central authorities of cap 3, that is, it at least surrounds steering device along the whole manipulation section between resting position 11 and final position 13 in local.

In the unshowned flexible program of another kind, can there is the steering device 19 being parallel to towards the direction of substrate from the pressure span 6 of the central authorities of cap 3 and extending to the force direction F pressed down, this steering device is guided and is arranged on through at least one the portion of leaving a blank 22 connected in bridge 14.In order to hold this steering device, in switch region 4, be provided with corresponding containment device.Be engaged on all worthily in containment device 19 during the whole motion process of steering device 19 between resting position and final position.The latter be also applicable in addition all other and illustrated flexible program, in these flexible programs, steering device is arranged for and is contained in containment device.

To cap 3 and therefore by the pressure span 6 of central authorities makes the pressure span of these central authorities move to the direction of substrate 2 to the power F pressed down.Make thus to be in by the pressure span 6 of its maneuvering area 16 and central authorities to act on the connection bridge 14 be connected and be out of shape as follows, that is, (Fig. 1 b, 1c) is moved in the direction with making the upper horizontal of two end section 17 and substrate 2 respectively along contact-making surface 5 by sliding motion.Under the power F continuously pressed down, connection bridge 14 is out of shape as follows and maneuvering area 16 is pressed by the direction towards substrate 2, that is, make maneuvering area 16 lie in (Fig. 1 c) in backstop 15.

Fig. 1 b show in on-position 12 in a first embodiment by switch of the present invention.At this, under the power F continuously pressed down of the pressure span 6 towards central authorities, the pressure span of these central authorities is pressed into down so far away by the direction towards substrate 2, namely, make to cause by the power F be applied on the maneuvering area 16 connecting bridge 1 distortion connecting bridge 14, connect bridge and by sliding motion, end section 17 is moved on contact-making surface 5.Establish electrical contact thus, thus achieve the electrical connection between two contact-making surfaces 5.

From Fig. 1 b, between backstop 15 and maneuvering area 16, there is spacing 23.As illustrated in figure 1 c, spacing 23 is diminished the power F pressed down by proceeding and switch 1 is brought in final position 13.In final position 13, the maneuvering area 16 connecting bridge 14 lies in backstop 15.End section 17 moves on contact-making surface 15 by sliding motion.

When moving to final position 13 (Fig. 1 c) from on-position 12 (Fig. 1 b), deformed region 7 can perform buckle process worthily.Thus ensure that the reliable contacting of the contact-making surface 15 and end section 17 existed on substrate.In addition, there is such possibility thus, that is, for arriving final position and completing switching process and provide the instruction in sense of touch to the operator of switch.

Fig. 2 a to Fig. 2 c shows the second execution mode by switch of the present invention.As shown in Fig. 1 a to Fig. 1 c, Fig. 2 a shows the key switch 1 with substrate 2 in resting position 11, and key switch cap 3 is disposed on key switch.There is with two forms the switch region 4 of the contact-making surface 5 being conductive traces 5 in the below of cap 3, can electrical connection be set up between conductive traces.Cap 3 has the pressure span 6 of central authorities, is applied on the pressure span of these central authorities perpendicular to substrate 2 to the power F pressed down, and cap also has the pressure span and the deformed region 7 be attached thereto and sealing area 8 that surround these central authorities.Deformed region 7 is made up of the material of flexibility worthily at this.

Substrate 2 has groove 18 that is closed, that surround switch region 4, and the sealing area 8 of cap 3 coordinates and is accurately engaged in this groove.Thus ensure that closing of the medium-tight in the space 9 surrounded by cap 3 and substrate 2.Extra it is possible that sealing area 8 and substrate 2 are by bonding or laser welding mutually.

Be furnished with between the pressure span 6 and substrate 2 of the central authorities of cap 3 and connect bridge 14.As set forth in the description, connect bridge 14 to be forms be arc pretension, spring element 20 with the metal tape of maneuvering area 16 and two end section 17 above.In the execution mode illustrated in Fig. 2 a to Fig. 2 c, the end section 17 connecting bridge 14 is permanently fixed on contact-making surface 5 on a substrate 2.This point can having welded or having been completed by socket connection such as by described end section 17 and contact-making surface 5.At this, end section 17 is embodied as plug 28 and in contact-making surface 5, arranges the socket 27 be connected conductively with this contact-making surface 5, and end section 17 can be brought in this socket.But end section 17 also can be bending and can be brought into adding in deep 27 of being connected conductively with contact-making surface 5 when pretension.Another freely end section 17 vertically locate above another contact-making surface 5 on a substrate 2 with spacing 24.

Backstop 15 for connecting bridge 14 extends towards the direction of the pressure span 6 of central authorities from substrate 2.This backstop 15 is used as the backstop of the maneuvering area 16 connecting bridge 14 substantially.Resting position (Fig. 2 a) in, the spacing 23 between maneuvering area 16 and backstop 15 is less than in the spacing 24 freely between end section 17 and the contact-making surface 5 of attaching troops to a unit.To the pressure span 6 of the central authorities of cap 3 facilitates the pressing down (Fig. 2 b) of direction of maneuvering area 16 to backstop 15 to the power F pressed down.Based on around the leverage of run-on point 29 in fixing end section 17 and the pretension of spring element 20, in on-position 12, that is freely end section 27 and contact-making surface 5 conductive contact of attaching troops to a unit time, leave the spacing 23 between maneuvering area 16 and backstop 15.When exerting a force further to the pressure span 6 of direction to central authorities of substrate 2, the maneuvering area 16 connecting bridge 14 vertically moves in backstop 15.Between this moving period, end section 17 performs the sliding motion becoming level with contact-making surface on contact-making surface 5 freely, thus switch 1 is in final position 13.

As illustrated in Fig. 1 a to Fig. 1 c, deformed region 7 can design as follows like this, that is, when the pressure span 6 along force direction F to central authorities continuously exerts a force, deformed region 7 performs buckle process between on-position 12 and final position 13.

Fig. 3 a to Fig. 3 c describes the third execution mode by switch of the present invention.As in Fig. 1 a to Fig. 1 c or Fig. 2 a to Fig. 2 c, Fig. 3 a show in resting position 11, with the key switch 1 of substrate 2, key switch cap 3 is disposed on this key switch.Below cap 3, there is with two forms the switch region 4 of the contact-making surface 5 being conductive traces 5, can electrical connection be set up between conductive traces.Cap 3 has the pressure span 6 of central authorities, is applied on the pressure span of these central authorities perpendicular to substrate 2 to the power F pressed down, and cap 3 also has the pressure span and the deformed region 7 be attached thereto and sealing area 8 that surround these central authorities.Deformed region 7 is made up of the material of flexibility worthily at this.

For avoiding repetition, all provide in the specification for the second execution mode be also applicable to the third execution mode about sealing area 8 and about the explaination of the possible buckle process of deformed region 7.

Connection bridge 14 is arranged between the pressure span 6 and substrate 2 of central authorities.This connects bridge 14 is metalwork substantially.This metalwork local has the spring element 20 that one or more form is the flat metal tape of arc pretension.Spring element 20 is connected with the metalwork connecting bridge 14 conductively at this.The spring element 20 that local is arranged is used as to connect the end section 17 of bridge 14 and implements the sliding motion on the contact-making surface 5 constructed perpendicular to substrate 2.

For this reason, steering device 19 extends to the direction of the pressure span 6 of central authorities from substrate 2.This steering device 19 is configured to rib shape worthily.This steering device 19 is coated with contact-making surface 5.Spring element 20 therefore from resting position 11 (Fig. 3 a) perform the sliding motion on the surface of the steering device 19 with coating contact-making surface thereon through on-position 12 (Fig. 3 b) to final position 13 (Fig. 3 c).Spring element 20 in this predeformation as follows, that is, makes them be pressed by towards steering device 19 or contact-making surface 5 during whole sliding motion.

Recognize in fig. 3 a, end section 17 is forced on steering device 19 in contact-making surface 5 outside, so there is no realize the electrical connection between contact-making surface 5.Fig. 3 b shows in on-position 12, end section 17 just in time contacts contact face 5 seamed edge and be therefore electrically connected.In the final position 13 illustrated in figure 3 c, it is inner that end section 17 is in contact-making surface 5.

Steering device 19 not only for guiding spring element 20, and for guiding whole connection bridge 14.For this reason, connecting bridge 14 is configured to the expandable part of the level of steering device 19 symmetrical worthily.In addition, implement backstop 15 on a substrate 2 and connect bridge 14 moving along substrate 2 direction for restriction.In final position (Fig. 3 c), end section 17 is directly on contact-making surface 5 and establishes electrical connection.In Fig. 3 a to 3c, in the region of backstop 15, be furnished with spring 30.This spring 30 is used to as back-moving spring key switch 1 to enter resting position 11 through on-position 12 reset from final position 13.

There is manipulation device 25, it is connected with the maneuvering area 16 connecting bridge 14.Maneuvering area 14 worthily middle part between two contact-making surfaces 5.Manipulation device 25 is guided out from besieged space 9 through the pressure span 6 of the central authorities of cap 3, is thus applied directly in manipulation device 25 to the power F pressed down.But certainly also possible that, manipulation device 25 is built into the inside in besieged space 9 and is in act on the pressure span 6 of central authorities and is connected.

Manipulation device 25 can be the component be made of plastics worthily, and this component can be connected with the maneuvering area 16 connecting bridge 14, or the section be molded on the contact area 16 connecting bridge 4 of metal tape.

Reference numerals list

1 key switch

2 substrates

3 key switch caps

4 switch regions

5 contact-making surfaces

The pressure span of 6 central authorities

7 deformed regions

8 sealing areas

9 besieged spaces

10 to the power pressed down; Force direction

11 resting positions

12 on-positions

13 final positions

14 connect bridge

15 backstops

16 maneuvering areas

17 end section

18 grooves

19 steering device

20 spring elements

21 containment devices

22 leave a blank portion

23 spacing between maneuvering area and backstop

24 spacing between end section and the contact-making surface of attaching troops to a unit

25 manipulation device

26 join domains

27 add deep

28 plugs

29 run-on points

30 springs

F power

Claims

1. a key switch, it is with being arranged on substrate (2), the key switch cap (3) be made up of the material of the flexibility of one, wherein, key switch cap (3) is arranged in the top, switch region (4) with at least two contact-making surfaces, and there is the pressure span (6) of central authorities, surround the pressure span of described central authorities and the deformed region (7) be connected with the pressure span of described central authorities and the sealing area (8) be connected with described deformed region (7), described sealing area closes the space (9) surrounded by substrate (2) and key switch cap (3) with being configured to medium-tight, wherein, by applying the pressure span of these central authorities (6) can be made to be moved into final section (13) towards the direction of substrate (2) from resting position (11) to the power pressed down to the pressure span (6) of central authorities, and wherein, there is the connection bridge (14) being used for setting up electrical connection between described at least two contact-making surfaces (5), and wherein, the pressure span (6) of central authorities is in act on connection bridge (14) and is connected and connects bridge (14) and can move towards the direction of the backstop (15) be configured in switch region (4).

2. by key switch according to claim 1, it is characterized in that, connect bridge (14) have the maneuvering area (16) that to be in the pressure span (6) of the central authorities of key switch cap (3) and act on and being connected and at least one can contact-making surface (5) go up activity, the end section (17) that is configured to sliding contact.

3. by key switch according to claim 2, it is characterized in that, by applying the pressure span of these central authorities can be made to be moved into final position (13) from resting position (11) through on-position (12) towards the direction of substrate (2) to the power pressed down (F) to the pressure span (6) of central authorities, in described on-position, electrical contact is established between end section (17) and contact-making surface, wherein, at least one end section (17) connecting bridge (14) at least implements sliding motion when being moved into final position (13) from on-position (12) at contact-making surface (5).

4. by the key switch described in aforementioned any one of claim, it is characterized in that, sealing area (8) coordinates accurately to be engaged on to be implemented in groove (18) in substrate (2), or sealing area (8) and substrate (2) are hermetically laser welded.

5. by the key switch described in aforementioned any one of claim, it is characterized in that, implement in switch region (4) extend towards the direction of the pressure span (6) of the central authorities of key switch cap (3) from substrate (2), for connecting the backstop (15) of bridge (14).

6. by the key switch described in aforementioned any one of claim, it is characterized in that existing and be used for perpendicular to guiding the steering device (19) connecting bridge (14) to the force direction pressed down (10).

7. by the key switch described in aforementioned any one of claim, it is characterized in that, connect bridge (14) to be form be the spring element (20) of the flat metal tape of arc pretension, to set up further in the end section (17) connecting bridge (14) and the electrical connection be parallel between contact-making surface (5) that substrate (2) constructs.

8. by key switch according to claim 7, it is characterized in that, in the maneuvering area (16) connecting bridge (14), be furnished with the steering device (19) of the directional structure vectorical structure of the pressure span (6) towards the central authorities of key switch cap (3), and the containment device of steering device (19) is built in the pressure span (6) of the central authorities of key switch cap (3).

9. by key switch according to claim 7, it is characterized in that, be configured with from substrate (2) to the steering device (19) that the direction of the pressure span of the central authorities of key switch cap (3) extends in switch region (4), described steering device is guided and is arranged on through at least one the portion of leaving a blank (22) connected in bridge (14), and the containment device (21) of described steering device (19) is built in the pressure span (6) of the central authorities of key switch cap (3).

10. by key switch according to claim 7, it is characterized in that, be provided with the steering device (19) being parallel to towards the direction of substrate (2) from the pressure span (6) of the central authorities of key switch cap (3) and extending to the force direction pressed down (10), described steering device is guided and is arranged on through at least one the portion of leaving a blank (22) in bridge (14) of connecting and the containment device (21) of steering device (19) is disposed in switch region (4).

11. by claim 7 or by claim 7 and the key switch described in any one of claim 8 to 10, it is characterized in that, the end section (17) connecting bridge (14) is permanently fixed on the contact-making surface (5) on substrate (2).

12. by claim 2, key switch described in 5 and 11, it is characterized in that, spacing between end section (17) and the contact-making surface of attaching troops to a unit is less than along to the spacing (23) of the force direction pressed down (10) in resting position (11) between the maneuvering area (16) connecting bridge (14) and backstop (15), and in on-position, exist and connecting the spacing (24) between bridge (14) and backstop (15), and in final position (13), during maneuvering area (16) and the backstop (15) of connection bridge (14) are in and contact.

13. by the key switch described in any one of claim 1 to 6, it is characterized in that, connecting bridge (14) is metalwork, local comprises the spring element (20) that form is the flat metal tape of arc pretension, to set up the electrical connection between the end section (17) connecting bridge (14) and the contact-making surface (5) constructed perpendicular to substrate (2) further.

14. by the key switch described in claim 6 and 13, it is characterized in that, contact-making surface (5) is arranged on steering device (19), and the end section (17) connecting bridge (14) implements sliding motion between moving period between resting position (11) and final position (13) on steering device (19), and be therefore in lasting the contacting with steering device (19).

15. by the key switch described in claim 13 or 14, it is characterized in that, there is manipulation device, described manipulation device is connected with the maneuvering area (16) connecting bridge (14) and is in act on the pressure span (6) of the central authorities of key switch cap (3) and is connected.