CN105144331B

CN105144331B - Key switch

Info

Publication number: CN105144331B
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: 2017-11-14
Anticipated expiration: 2034-02-03
Also published as: WO2014131576A1; CN105144330B; CN105144331A; CN105144330A; DE102013203466A1; WO2014131781A1

Abstract

The present invention relates to a kind of key switch,It, which is carried, is arranged on substrate (2),The key switch cap (3) made of the flexible material of one,Wherein,Key switch cap (3) is arranged in above the switch region (4) with least two contact surfaces (5) and the pressure span (6) with center,Surround the pressure span (6) in center and the deformed region (7) being attached thereto and the sealing area (8) being connected with the deformed region (7),Sealing area is configured to,Close to medium-tight the space (9) by substrate (2) and key switch cap (3) encirclement,Wherein,By applying the power being pressed downward to the pressure span (6) in center this central pressure span can be made to be moved into final position (13) to the direction of substrate (2) from resting position (11),And wherein,In the presence of the connection bridge (14) for setting up electrical connection between at least two contact surfaces (5),And wherein,The pressure span (6) in center and connection bridge (14) are in the direction motion for the backstop (15) that in effect connection and connection bridge (14) can be towards construction in switch region (4).

Description

Key switch

Technical field

The present invention relates to a kind of electromechanical component, and it can for example be used in the shutdown system of vehicle.

Background technology

If need switching function in the component of electromechanics, then choose switch and be integrated into this as single component In electromechanical component.

Such electrical contact switch is used in many applications as microswitch, switchette or super-small size switch In field, it is used for example in automotive engineering and family's power technology.In these switches, slider is connect with sliding motion from one Contact portion bit strip is to another contact site.Here, conductive connection only should occur on each contact site.

A kind of switch is disclosed by the C1 of DE 39 10 812, especially a kind of instrument switch, it is configured with least one work Dynamic contact, the contact can move to on-position, and the contact also band by switch controls from off-position There is housing, the housing has at least one corresponding contact for being used to be contacted in its on-position by the contact of activity Receiving portion, the receiving portion are not load and have the contact that can be introduced externally into housing for loading afterwards Body.

A kind of electric slider switch is disclosed by the B3 of DE 10 2,007 048 581, it carries housing, in the housing Arrange a common contact and at least one selection contact with contact surface.Contact surface with selecting contact It is disposed adjacent to a sliding area made of the material being electrically insulated.It is in what is be conductively connected all the time with common contact And the contactor with least one slider, it is conductively connected or being in selection contact, otherwise contact slide region. In addition, the controls that can be activated is arranged in the housing as follows, i.e. so that the controls makes contactor extremely when manipulating A few slider slidably moves in sliding area from the contact surface of selection contact on rail is slided and/or from cunning Dynamic region comes out the contact surface motion towards selection contact.Do not slided when being also configured with running over sliding area in sliding rail The region that moving contact touches.

The defects of known switch, is very big space requirement.In addition, known switch is by multiple individually component structures Into, it means that higher manufacture expends.

A kind of deflating cap for being used to switch as known to the A of GB 2 112 577.This deflating cap is by integral rubber type of material It is made and mainly there is following areas：The pressure span in center, it has projection towards the direction of substrate, and the pressure span is by ring The region of shape surrounds and is connected with this annular region.Basic ring is connected with the annular region, on the basic ring, deflating cap quilt It is arranged on the substrate of switch.The region of annular is divided into heavy wall and thin-walled region.Arranged between these regions Rib that is annular, being pointed to towards orientation substrate.The region of heavy wall is between the pressure span in this rib and center.The area of thin-walled Domain is between rib and basic ring.When manipulating the pressure span in center, rib formed with substrate contacted before this.Apply pressure further During power, the buckle process in the region of thin-walled and heavy wall is realized, this buckle process makes rib away from basal plane and makes center Pressure span contacted with substrate.In order to ensure deflating cap returns resiliently to initial position and in order to ensure being switched on and off cap Convenient air exchange between the interior zone in the space of encirclement and perimeter, sets some steam vents in deflating cap.

The defects of this switch, is, can not ensure reliably to establish electrical connection.In addition, the space for being switched on and off cap encirclement does not have There is protection against the tide.

The content of the invention

The technical problems to be solved by the invention are to create a kind of planform for having very little and reliable on off state Switch.

The solution of the technical problem uses the key switch with following feature to reach, i.e.

A kind of key switch, its carry be arranged on substrate on, by one flexible material made of key switch cap, Wherein, key switch cap is arranged in above the switch region with least two contact surfaces, and the pressure span with center, Surround center pressure span and with center the pressure span deformed region being connected and the seal area being connected with deformed region Domain, sealing area close the space by substrate and the encirclement of key switch cap with being configured to medium-tight, wherein, by center Pressure span apply the power that is pressed downward can make this central pressure span towards the direction of substrate from resting position move into Enter final position, and wherein, the connection bridge for setting up electrical connection between at least two contact surfaces, Yi Jiqi be present In, central pressure span with couple bridge be in that effect connects and couple bridge can be towards backstop of the construction in switch region Direction is moved, and connection bridge is the spring element for the flat metal tape that form is arc pretension, is being coupled with further setting up The end section of bridge and parallel to the electrical connection between the contact surface of base plate structure, couples an end section of bridge by enduringly It is fixed on the contact surface on substrate.

Next it is referred to as the key switch by the present invention of switch, including substrate, is provided with substrate and is next claimed For the key switch cap of cap.Cap is made up of the material of unitary flexible and is disposed in the switch of at least two contact surfaces herein Overlying regions.Flexible material can be rubber or flexible plastic herein.

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

There is the pressure span in center by the cap of the switch of the present invention, surround the central pressure span and be attached thereto Deformed region and the sealing area being connected with deformed region, the sealing area close with being configured to aeroseal by substrate and The space that cap surrounds.

By applying the power that is pressed downward to the pressure span in center, make this center pressure zone towards the direction of substrate from Resting position is moved into final position.

According to the present invention, the connection bridge for setting up the electrical connection between at least two contact surfaces be present, wherein, in The pressure span of centre is in effect connection according to the present invention with coupling bridge, wherein, connection bridge can be towards construction in switch region In backstop direction motion.Connection bridge be hereinafter clearly understood to be connect with what the center pressure zone of cap was connected Contacting surface.

Couple the behaviour that there is bridge the central pressure span with cap to be in effect connection in a kind of advantageous embodiment Vertical region and at least one end section can moving on the contact surface, being configured to slider.

In another advantageous embodiment, central pressure span is by applying the power that is pressed downward and can be towards substrate Direction motion, more precisely, moving to final position from resting position by on-position.Here, on-position is meaned , electrical contact is set up between the contact surface for coupling the end section of bridge and being associated with the end section.In addition, connection bridge End section implements sliding motion on the contact surface at least when being moved into final position from on-position.It is this to contact Sliding motion on face has the advantage that, i.e. ensure that reliable contacting and on the contact surface there may be Oxide layer be worn away.It thus ensure that the reliable contacting with contact surface on the whole supporting surface of end section.

Brief description of the drawings

Next the advantageous embodiment of the present invention and the present invention are explained in detail by accompanying drawing.In accompanying drawing：

Fig. 1 a are the first embodiments of the switch by the present invention in resting position；

Fig. 1 b are the first embodiments of the switch by the present invention in on-position；

Fig. 1 c are the first embodiments of the switch by the present invention in final position；

Fig. 2 a are second of embodiments of the switch by the present invention in resting position；

Fig. 2 b are second of embodiments of the switch by the present invention in on-position；

Fig. 2 c are second of embodiments of the switch by the present invention in final position；

Fig. 3 a are the third embodiments of the switch by the present invention in resting position；

Fig. 3 b are the third embodiments of the switch by the present invention in on-position；

Fig. 3 c are the third embodiments of the switch by the present invention in final position.

All figures show that the profile of each embodiment, wherein, the diagram on the left side is shown respectively to section plane Top view and the diagram on the right corresponding three-dimensional view is shown.

Embodiment

Fig. 1 a to 1c show the first embodiment of the switch by the present invention.In fig 1 a, switch is in rest position In putting 11, then it is in on-position 12 and is in figure 1 c in final position 13 in Figure 1b.Key switch 1 has base Plate 2, key switch cap 3 is arranged on substrate.Switch region 4 with form for two contact surfaces 5 of conductive traces 5 is in cap 3 lower section, electrical connection can be set up between conductive traces.

Switch region 4 is substantially the region of substrate 2, and contact surface 5 extends in this region.Substrate 2 may, for example, be shape Formula be with plastic injection encapsulate lead frame electronics component bracket, wherein, in switch region 4, lead frame not by Injection encapsulated.But substrate 2 can also be the housing for circuit board, wherein, in switch region 4, housing has to be stayed accordingly Empty portion.

The purpose of switch region is to limit a region, and key switch 1 should be set up in the region in conductive traces 5 Between electrical connection.

Cap 3 has the pressure span 6 in center, and the power F being pressed downward perpendicular to substrate 2 is applied to the central pressure span On, cap also has the deformed region 7 and sealing area 8 for surrounding this central pressure span and being attached thereto.Deformed region 7 Worthily it is made up herein of the material of flexibility.Sealing area 8 and substrate 2 are in join domain 26 by bonding connection portion or laser Welded connection connects.Therefore by medium-tight close in the space 9 surrounded by substrate 2 and cap 3.Therefore it is able to ensure that not wet Gas or such as dust invade in switch region from outside and thus cause contact surface 5 to be corroded or make dirty.

Connection bridge 14 is disposed between the pressure span 6 in center and substrate 2.This connection bridge 14 is used to set up connecing Electrical connection between contacting surface 5.Connection bridge 14 is worthily that form is by the spring element 20 of the flat metal tape of arc pretension. Switch element has operator region 16 and two end sections 17.Operator region 16 is herein at the central pressure span 6 with cap 3 Connected in effect.End section 17 is so bent so that they can implement horizontal above substrate 2 and contact surface 5 Sliding motion.End section 17 is kept flat on a substrate 2 during whole sliding motion in addition.In resting position, end section 17 keep flat electrical connection are established on a substrate 2 and not between contact surface 5.

Direction for coupling pressure span 6 of the backstop 15 of bridge 14 from substrate 2 towards center extends.This backstop 15 It is essentially acted as the backstop of the maneuvering area 16 for connection bridge 14.But it is also contemplated that in the region of end section 17 In backstop (not shown) is set on a substrate 2, the backstop limits the horizontal motion of end section 17.

In addition, the direction of pressure span 6 of the steering device 19 from substrate 2 towards center extends.This steering device 19 Worthily it is directed through the portion 22 of leaving blank being present in the maneuvering area 16 of connection bridge 14.Steering device 19 is used to be fixedly connected Bridge 14, particularly for along level direction, the maneuvering area 16 for the bridge 14 that is fixedly connected i.e. perpendicularly to force direction F.Fig. 1 a show A kind of flexible program is gone out, in the flexible program, portion 22 of leaving blank medially is designed in the maneuvering area 16 of connection bridge 14.But It is also possible that the portion 22 of leaving blank for being used for two steering devices 19 be present, wherein, portion 22 of leaving blank implements the manipulation in connection bridge 14 On the edge in region 16.

The containment device 21 for steering device 19 in the region of the central pressure span 6 of cap 3 be present.These are accommodated Device 21 at least partially, more specifically worthily wraps along the whole manipulation section between resting position and final position Enclose steering device 19 (Fig. 1 c).Thus ensure that connection bridge 14 implement in the region of maneuvering area 16 perpendicular to substrate 2 with And the motion of anti-torsion.It is possible to rotate on force direction F to prevent from coupling bridge 14, can additionally sets on a substrate 2 Other steering devices, all by these during whole sliding motion of the end section 17 between resting position and final position Guided in steering device.

In unshowned flexible program, there may be being connected, towards center with the maneuvering area 16 of connection bridge 14 The steering device 19 of the direction extension of pressure span 6.Containment device 21 in the central pressure span 6 of cap 3 as follows Design, i.e. it surrounds steering device at least partially along the whole manipulation section between resting position 11 and final position 13.

In another unshowned flexible program, there may be from the central pressure span 6 of cap 3 towards substrate The steering device 19 of force direction F extensions being pressed downward is oriented parallel to, the steering device is directed through at least one be arranged on Couple the portion 22 of leaving blank in bridge 14.In order to accommodate this steering device, corresponding containment device is provided with switch region 4.Lead All worthily it is engaged in containment device 19 during whole motion process of the lead device part 19 between resting position and final position. The latter is also applied for all other and illustrated flexible program in addition, and in these flexible programs, steering device is set Put for being contained in containment device.

By making this central pressure area on cap 3 and therefore to the power F being pressed downward on the pressure span 6 in center Moved to the direction of substrate 2 in domain.Thus make to be in coupling for effect connection with the pressure span 6 in center by its maneuvering area 16 Bridge 14 deforms as follows, i.e. so that two end sections 17 with the upper horizontal of substrate 2 respectively along contact surface 5 Moved by sliding motion (Fig. 1 b, 1c) in direction.Under the power F continuously pushed, connection bridge 14 becomes as follows Shape and maneuvering area 16 are pressed towards the direction of substrate 2, i.e. so that maneuvering area 16 is lain in backstop 15 (Fig. 1 c).

Fig. 1 b show the switch by the present invention in the first embodiment in on-position 12.Here, Towards under the power F continuously pushed of the pressure span 6 in center, this central pressure span is by towards the side of substrate 2 It is so remote to being pressed into down, i.e. so that causing connection bridge 14 by the power F being applied on the maneuvering area 16 of connection bridge 1 Deformation, connection bridge make end section 17 move on contact surface 5 by sliding motion.Thus electrical contact is established, so as to real The electrical connection between two contact surfaces 5 is showed.

From Fig. 1 b, spacing 23 between backstop 15 and maneuvering area 16 be present.As illustrated in figure 1 c, by continuing The power F pushed make spacing 23 diminish and switch 1 to be brought in final position 13.In final position 13, couple the behaviour of bridge 14 Vertical region 16 is lain in backstop 15.End section 17 is moved on contact 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 be performed worthily Buckle process.It thus ensure that the reliable contacting in contact surface present on substrate 15 and end section 17.In addition, by Possibility as this presence, i.e. provided for reaching final position and completing switching process to the operator of switch tactile Instruction in feel.

Fig. 2 a to Fig. 2 c show second of embodiment of the switch by the present invention.As shown in Fig. 1 a to Fig. 1 c, Fig. 2 a show the key switch 1 with substrate 2 in resting position 11, and key switch cap 3 is disposed on key switch. The switch region 4 for the contact surface 5 of conductive traces 5 with two forms in the lower section of cap 3 be present, can be between conductive traces Set up electrical connection.Cap 3 has the pressure span 6 in center, and the power F being pressed downward perpendicular to substrate 2 is applied to the central pressure On region, cap also has the deformed region 7 and sealing area 8 for surrounding the central pressure span and being attached thereto.Deformed area Domain 7 is worthily made up of the material of flexibility herein.

Substrate 2 has closing, encirclement switch region 4 groove 18, and the sealing area 8 of cap 3, which coordinates, is accurately engaged to this In groove.It thus ensure that the closing of the medium-tight in the space 9 surrounded by cap 3 and substrate 2.Additionally it is possible that sealing area 8 It is mutually bonded with substrate 2 or laser welding.

Connection bridge 14 is disposed between the central pressure span 6 of cap 3 and substrate 2.As above in the description As setting forth, connection bridge 14 is that form is arc pretension, the metal with maneuvering area 16 and two end sections 17 The spring element 20 of band.In the embodiment illustrated in Fig. 2 a to Fig. 2 c, couple the end section 17 of bridge 14 by enduringly solid On fixed contact surface 5 on a substrate 2.This point can be completed for example by the welding of described end section 17 Yu contact surface 5 Or completed by socket connection.Here, end section 17 is embodied as plug 28 and set and the contact surface 5 in contact surface 5 Conductively connected socket 27, end section 17 can be brought into the socket.But end section 17 can also be bending And it can be brought into the case of pretension in the deepening portion 27 conductively connected with contact surface 5.Another is freely held Portion's section 17 vertically locates another top of contact surface 5 on a substrate 2 with spacing 24.

Direction for coupling pressure span 6 of the backstop 15 of bridge 14 from substrate 2 towards center extends.This backstop 15 It is essentially acted as the backstop for coupling the maneuvering area 16 of bridge 14.In resting position (Fig. 2 a), in maneuvering area 16 and backstop 15 Between spacing 23 be less than spacing 24 between free end section 17 and the contact surface 5 attached troops to a unit.To the center of cap 3 Pressure span 6 on the power F being pressed downward facilitate the pushing (Fig. 2 b) to the direction of backstop 15 of maneuvering area 16.Based on around The leverage of run-on point 29 in fixed end section 17 and the pretension of spring element 20, in on-position 12, That is free end section 27 and attached troops to a unit 5 conductive contact of contact surface when, leave maneuvering area 16 and backstop 15 it Between spacing 23.When further being exerted a force to the pressure span 6 in center in the direction to substrate 2, couple the maneuvering area 16 of bridge 14 Vertically moved in backstop 15.During this motion, free end section 17 performed on contact surface 5 with contact surface into Horizontal sliding motion, so that switch 1 is in final position 13.

As illustrated in Fig. 1 a to Fig. 1 c, deformed region 7 can be designed so as follows, i.e. Along force direction F to center pressure span 6 continuously exert a force when, deformed region 7 is in on-position 12 and final position 13 Between perform buckle process.

Fig. 3 a to Fig. 3 c illustrate the third embodiment of the switch by the present invention.Such as in Fig. 1 a to Fig. 1 c or Fig. 2 a extremely In Fig. 2 c like that, Fig. 3 a show key switch 1 in resting position 11, with substrate 2, and key switch cap 3 is arranged On the key switch.The switch region 4 for the contact surface 5 of conductive traces 5 with two forms below cap 3 be present, leading Electrical connection can be set up between body trace.Cap 3 has the pressure span 6 in center, and the power F being pressed downward perpendicular to substrate 2 is applied to On the central pressure span, cap 3, which also has, surrounds the central pressure span and the deformed region 7 that is attached thereto and close Seal region 8.Deformed region 7 is worthily made up of the material of flexibility herein.

To avoid repeating, it is all provided in the specification for second of embodiment on sealing area 8 and Explaination on the possible buckle process of deformed region 7 is also applied for the third embodiment.

Connection bridge 14 is arranged between the pressure span 6 in center and substrate 2.This connection bridge 14 is substantially metal Part.This metalwork locally has spring element 20 of one or more forms for the flat metal tape of arc pretension.Spring Element 20 is conductively connected with coupling the metalwork of bridge 14 herein.The spring element 20 locally arranged is used as the end of connection bridge 14 The sliding motion of section 17 and implementation on the contact surface 5 constructed perpendicular to substrate 2.

Therefore, steering device 19 extends from substrate 2 to the direction of the pressure span 6 in center.This quilt of steering device 19 Worthily it is configured to ribbed.Contact surface 5 is coated with this steering device 19.Spring element 20 is therefore from resting position 11 (Fig. 3 a) rises to be performed in the contact surface with coating thereon by on-position 12 (Fig. 3 b) to final position 13 (Fig. 3 c) Sliding motion on the surface of steering device 19.The predeformation as follows herein of spring element 20, i.e. make them entirely slide Pressed during dynamic motion towards steering device 19 or contact surface 5.

Recognize in fig. 3 a, end section 17 is forced into outside contact surface 5 on steering device 19, therefore is not carried out Electrical connection between contact surface 5.Fig. 3 b are shown in on-position 12, the rib of the just contacts contact face 5 of end section 17 Side and therefore electrically connect.In the final position 13 shown in figure 3 c, end section 17 is in inside contact surface 5.

Steering device 19 is applied not only to guide spring element 20, and is also used for guiding whole connection bridge 14.Therefore, connection The horizontal expandable part that bridge 14 is worthily configured to steering device 19 is symmetrical.In addition, be implemented with a substrate 2 backstop 15 with For limiting motion of the connection bridge 14 along the direction of substrate 2.In final position (Fig. 3 c), end section 17 is directly in contact surface On 5 and establish electrical connection.In Fig. 3 a into 3c, spring 30 is disposed with the region of backstop 15.This spring 30 is made It is used for reset of the key switch 1 from final position 13 by on-position 12 into resting position 11 for back-moving spring.

Manipulation device 25 be present, it is connected with coupling the maneuvering area 16 of bridge 14.Maneuvering area 14 is worthily between two parties Between two contact surfaces 5.Manipulation device 25 derives through the central pressure span 6 of cap 3 from besieged space 9, thus The power F being pressed downward is applied directly in manipulation device 25.But certainly it is also possible that manipulation device 25 be built into it is besieged The inside in space 9 and with center pressure span 6 be in effect connect.

Manipulation device 25 can be worthily the component being made of plastics, and this component can be with coupling the manipulation area of bridge 14 Domain 16 connects, or the section being molded on the contact area 16 of connection bridge 4 of metal tape.

Reference numerals list

1 key switch

2 substrates

3 key switch caps

4 switch regions

5 contact surfaces

The pressure span in 6 centers

7 deformed regions

8 sealing areas

9 besieged spaces

10 power being pressed downward；Force direction

11 resting positions

12 on-positions

13 final positions

14 connection bridges

15 backstops

16 maneuvering areas

17 end sections

18 grooves

19 steering devices

20 spring elements

21 containment devices

22 leave blank portion

23 spacing between maneuvering area and backstop

24 spacing between end section and the contact surface attached troops to a unit

25 manipulation devices

26 join domains

27 deepening portions

28 plugs

29 run-on points

30 springs

F power

Claims

1. a kind of key switch, its carry be arranged on it is on substrate (2), made of the flexible material of one key switch cap (3), wherein, key switch cap (3) is arranged in above the switch region (4) with least two contact surfaces, and with center Pressure span (6), the deformed region (7) that surrounds the central pressure span and be connected with the central pressure span with And the sealing area (8) being connected with the deformed region (7), the sealing area are closed by substrate with being configured to medium-tight (2) and the space (9) that surrounds of key switch cap (3), wherein, pass through to the pressure span (6) in center and apply the power energy that is pressed downward This central pressure span (6) is set to be moved into final position (13) towards the direction of substrate (2) from resting position (11), with And wherein, the connection bridge (14) for setting up electrical connection between at least two contact surface (5) be present, and wherein, Center pressure span (6) and couple bridge (14) be in effect connection and couple bridge (14) can towards construct in switch region (4) the direction motion of the backstop (15) in, the connection bridge (14) are the springs for the flat metal tape that form is arc pretension Element (20), further to set up the end section (17) in connection bridge (14) and the contact surface parallel to substrate (2) construction (5) electrical connection between, an end section (17) of the connection bridge (14) are permanently fixed the contact on substrate (2) On face (5), wherein, connection bridge (14) has the behaviour that the central pressure span (6) with key switch cap (3) is in effect connection Vertical region (16) and it is at least one can on contact surface (5) end section (17) that is movable, being configured to slider.

2. the key switch as described in claim 1, it is characterised in that be pressed downward by applying to the pressure span (6) in center Power (F) this central pressure span can be made to pass through on-position (12) towards the direction of substrate (2) from resting position (11) Final position (13) is moved into, in the on-position, electricity is established between contact surface in end section (17) and is connect Touch, wherein, at least one end section (17) of connection bridge (14) is at least being moved into final position from on-position (12) (13) sliding motion is implemented on contact surface (5) when.

3. the key switch as described in claim 1 or 2, it is characterised in that sealing area (8), which coordinates, is accurately engaged on implementation In groove (18) in substrate (2), or sealing area (8) and substrate (2) are hermetically laser welded.

4. the key switch as described in claim 1 or 2, it is characterised in that be implemented with switch region (4) from substrate (2) Backstop (15) that the direction risen towards the central pressure span (6) of key switch cap (3) extends, for coupling bridge (14).

5. the key switch as described in claim 1 or 2, it is characterised in that exist for parallel to the force direction being pressed downward (10) come guide connection bridge (14) steering device (19).

6. the key switch as described in claim 1, it is characterised in that be disposed with the maneuvering area (16) of connection bridge (14) Towards the steering device (19) of the directional structure vectorical structure of the central pressure span (6) of key switch cap (3), and steering device (19) Containment device be built into the central pressure span (6) of key switch cap (3).

7. the key switch as described in claim 1, it is characterised in that be configured with switch region (4) from substrate (2) to by The central pressure span of key switch cap (3) direction extension steering device (19), the steering device be directed through to A few portion of leaving blank (22) being arranged in connection bridge (14), and the containment device (21) of the steering device (19) is constructed In the central pressure span (6) of key switch cap (3).

8. the key switch as described in claim 1, it is characterised in that be provided with the central pressure from key switch cap (3) Play the steering device (19) towards the force direction (10) for being oriented parallel to the be pressed downward extension of substrate (2), the guiding in region (6) Device is directed through the container of at least one portion of leaving blank (22) being arranged in connection bridge (14) and steering device (19) Part (21) is disposed in switch region (4).

9. the key switch as described in claim 1, it is characterised in that connection bridge (14) have with key switch cap (3) The pressure span (6) of centre be in effect connection maneuvering area (16) and it is at least one can it is movable on contact surface (5), construct Into the end section (17) of slider, and it is implemented with switch region (4) from substrate (2) towards key switch cap (3) backstop (15) direction extension, for coupling bridge (14) of central pressure span (6), and the power that edge is pressed downward Spacing (23) of the direction (10) in resting position (11) between the maneuvering area (16) of connection bridge (14) and backstop (15) will Less than the spacing between end section (17) and the contact surface attached troops to a unit, and in on-position, exist in connection bridge (14) spacing (24) between backstop (15), and in final position (13), the maneuvering area (16) of connection bridge (14) with Backstop (15) is in contact.