CN204204703U - A kind of switch using torsion spring to be terminal - Google Patents
A kind of switch using torsion spring to be terminal Download PDFInfo
- Publication number
- CN204204703U CN204204703U CN201420695794.3U CN201420695794U CN204204703U CN 204204703 U CN204204703 U CN 204204703U CN 201420695794 U CN201420695794 U CN 201420695794U CN 204204703 U CN204204703 U CN 204204703U
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- terminal
- torsion spring
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- fixed terminal
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Abstract
The utility model discloses a kind of switch using torsion spring to be terminal, comprise upper cover, base, fixed terminal, movable terminal and pressing piece, described base is provided with a guide pillar, pressing piece is connected to and is socketed with on the guide pillar of back-moving spring, upper cover is exposed for pressing in upper end, upper cover and base fasten and make middle part form a cavity, fixed terminal and movable terminal are arranged in cavity, fixed terminal all passes base with one end of movable terminal and is connected with external circuit, described movable terminal is torsion spring, and it is arranged on side base being positioned at fixed terminal; One end passes base for connection, and this end and base are fixed, and the torsion spring other end is pressed part control for contacting with fixed terminal as movement arm.Compared with prior art, the utility model uses torsion spring as movable terminal structure, its good elasticity, and can be terminal switch has good feel by use torsion spring, and torsion spring manufacturing cost is lower, structure is more simple, and the life-span is longer.
Description
Technical field
The utility model relates to a kind of electronic switch, particularly a kind of switch using torsion spring to be terminal.
Background technology
A lot of action needs of existing equipment use key switch as input medium, and key switch quality determines the experience of input equipment, need to ensure good feel and useful life.The movable contact spring that existing key switch adopts sheet metal to make is because the restriction in switch internal space, and the intensity relative deficiency of sheet metal, have impact on handfeel of keys and life-span.
Utility model content
In view of this, the problem that the utility model needs solve is: provide a kind of good hand touch, the life-span is good, and the switch that the use torsion spring that structure is simple, manufacturing cost is lower is terminal.
In order to solve the problem, the utility model is by the following technical solutions: a kind of switch using torsion spring to be terminal, comprise upper cover, base, fixed terminal, movable terminal and pressing piece, described base is provided with a guide pillar, pressing piece is connected to and is socketed with on the guide pillar of back-moving spring, upper cover is exposed for pressing in upper end, upper cover and base fasten and make middle part form a cavity, fixed terminal and movable terminal are arranged in cavity, and fixed terminal all passes base with one end of movable terminal and is connected with external circuit; By the contact moving up and down promotion movable terminal action and then control movable terminal and fixed terminal and the disconnection of pressing piece, described movable terminal is torsion spring, and it is arranged on side base being positioned at fixed terminal; One end passes base for connection, and this end and base are fixed, and the torsion spring other end is pressed part control for contacting with fixed terminal as movement arm.
Preferably, described pressing piece extends at least one projection to movable terminal direction, is moved realize contacting with fixed terminal or disconnecting when pressing piece moves up and down by protruding pushing action arm.
Preferably, described fixed terminal comprises tip side, and described tip side is vertical with base to be arranged, pressing piece control action arm move forward and backward and then make movement arm and tip side realize before and after disconnect or contact.
Preferably, described fixed terminal also comprises installation portion, and described installation portion is provided with through hole, and fixed terminal is received on guide pillar by through hole cover and realized fixing, and the bending of installation portion one end passes base exterior downwards and forms pin, and other end bending upwards extends to form tip side.
Preferably, described base is provided with a torsion spring fixed leg being convenient to rotate before and after torsion spring movement arm arranged perpendicular to base end face, and described torsion spring is fixed on torsion spring fixed leg.
Preferably, the movement arm of described torsion spring extends in parallel the first action support arm by the upper end of torsion spring higher than tip side level height and base end face, and bend vertically downward at pressing piece high spot, extend to below tip side level height and form the second action support arm, vertical bending extends to contact and rectifies bottom and form the 3rd action support arm again, upwards bending makes end extend to contact to rectify front end and form four support arm relative with before and after fixed terminal, form inc hollow structure again.
Preferably, described fixed terminal comprises tip side, and described tip side and base be arranged in parallel, and pressing piece control action arm moves up and down and then makes movement arm contact and tip side realize disconnecting or contacting.
Preferably, described fixed terminal also comprises installation portion, and described installation portion is provided with through hole, and fixed terminal is received on guide pillar by through hole cover and realized fixing, and the bending of installation portion one end passes base exterior downwards and forms pin, and the other end extends in parallel formation tip side.
Preferably, described base is provided with a mounting groove, and described torsion spring is laterally fixed in mounting groove.
Preferably, the movement arm of described torsion spring to be extended to fixed terminal direction by one end of torsion spring and forms the 5th action support arm, the 6th action support arm being parallel to base end face is bent out in convex upper portion, described 6th action support arm is positioned at convex upper portion and then moves up and down by protruding promotion, and finally bending extends to upper end, contact and formed and fixed contact the 7th action support arm opposing upper and lower.
Compared with prior art, the beneficial effects of the utility model are: use torsion spring as movable terminal structure, its good elasticity, can be terminal switch has good feel by use torsion spring, and torsion spring manufacturing cost comparatively sheet metal is lower, structure is more simple, and the life-span is longer, the use sense that improve the switch that use torsion spring is terminal is subject to, and has a good application prospect.
Accompanying drawing explanation
Fig. 1 is the overall structure exploded perspective view of the Switching embodiments 1 that use torsion spring described in the utility model is terminal;
Fig. 2 is the movable terminal structural representation of the Switching embodiments 1 that use torsion spring described in the utility model is terminal;
Fig. 3 is the assembled state internal structure schematic diagram of the Switching embodiments 1 that use torsion spring described in the utility model is terminal;
Fig. 4 is the overall structure exploded perspective view of the Switching embodiments 2 that use torsion spring described in the utility model is terminal;
Fig. 5 is the movable terminal structural representation of the Switching embodiments 2 that use torsion spring described in the utility model is terminal;
Fig. 6 is the assembled state cut-away view of the Switching embodiments 2 that use torsion spring described in the utility model is terminal;
Fig. 7 is the overall structure exploded perspective view of the Switching embodiments 3 that use torsion spring described in the utility model is terminal;
Fig. 8 is the movable terminal structural representation of the Switching embodiments 3 that use torsion spring described in the utility model is terminal;
Fig. 9 is the assembled state internal structure schematic diagram of the Switching embodiments 3 that use torsion spring described in the utility model is terminal;
Figure 10 is the assembled state structural representation of the Switching embodiments 1-2 that use torsion spring described in the utility model is terminal.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment 1
Fig. 1 is the overall structure explosive view of embodiment 1, as shown in Figure 1, the switch that use torsion spring described in the utility model is terminal comprises upper cover 1, base 2, pressing piece 5, back-moving spring 6, movable terminal 4 and fixed terminal 3, this upper cover 1 periphery arranges multiple button hole 11, and base 2 place corresponding with upper cover 1 button hole 11 is provided with screens 22, upper cover 1 can be fastened with coordinating of screens 22 by button hole 11 with base 2, forms the cavity that places pressing piece 5, back-moving spring 6, movable terminal 4 and fixed terminal 3 after fastening in the middle of upper cover 1 and base 2.This base 2 is provided with guide pillar 21, and guide pillar 21 bottom is extended bottom base 2, and back-moving spring 6 is socketed in outside guide pillar 21, is provided with guide hole in the middle of this guide pillar 21.And this pressing piece 5 bottom is provided with backstay, pressing piece 5 is by penetrating guide hole by backstay, coordinate the back-moving spring 6 between pressing piece 5 and base 2 can realize depressing and upspring, also guide groove is provided with between pressing piece 5 four edges and base 2, when pressing piece 5 is pressed or act on reset by back-moving spring 6, pressing piece 5 moves up and down along guide groove, pressing piece 5 top passes upper cover 1 to connect outside keycap, pressing piece 5 is also provided with at least one projection 51, these protruding 51 front ends are provided with domatic, when pressing piece 5 moves up and down, protruding 51 can promote torsion spring movement arm makes it swing realization and contacts with fixed terminal 3 or disconnect.Preferably, base 2 is also provided with the fixing press strip 7 installed for button, this fixing press strip 7 one-tenth inverted U, and two ends pass base 2 and fix with other signal wiring.
In embodiment 1, fixed terminal 3 and movable terminal 4 are fixed on base 2, and wherein, fixed terminal 3 comprises the pin end 31 be welded and fixed with external circuit, the tip side 33 fixed terminal 3 being fixed on the installation portion 32 on guide pillar 21 and contacting with movable terminal 4.Installation portion 32 is provided with a through hole that can be socketed in above guide pillar 21, its one end bending extend upwards perpendicular to installation portion 32 for the tip side 33 contacted before and after movement arm, it is outside that other end pin end 31 bending passes base 2, and fixed terminal 3 is received on guide pillar 21 by through hole cover and realized fixing.Preferably, this contact is column contact, and it can be contacted with movable terminal 4 preferably.Described movable terminal 4 is torsion spring, and base 2 is provided with a torsion spring fixed leg 23 arranged perpendicular to base 2 bottom surface, torsion spring is fixed on torsion spring fixed leg 23, swing is extended and the movement arm that can contact with the tip side 33 of fixed terminal 3 in one end, this movement arm for the projection 51 of the part 5 that is pressed slope driving so that realize being connected with fixed contact or disconnecting, its other end is pin end 410, passes base 2 and is connected with external circuit.
As shown in Figure 2, in embodiment 1, the movement arm of this torsion spring extends in parallel the first action support arm 411 by the upper end of torsion spring higher than tip side 33 level height and base 2 bottom surface, and bend vertically downward at protruding 51 places of pressing piece 5, extend to below tip side 33 level height and form the second action support arm 412, vertical bending extends to the positive bottom of tip side 33 and forms the 3rd action support arm 413 again, upwards bending makes end extend to the positive front end of tip side 33 and forms the 4th action support arm 414 again, forms inc hollow structure.
As shown in Figure 3, on the edge that pressing piece 5 bottom is relative with the second action support arm position, be provided with protruding 51, when pressing piece 5 not by people for pressing time, the protruding 51 domatic lower contacts of the second action support arm 412 bottom and pressing piece 5, because domatic reason, second action support arm 412 domaticly to be backed down by protruding 51, the movement arm of movable terminal 4 and the contact separation of fixed terminal 3, connect and disconnect, do not produce signal; When pressing piece 5 by people for pressing time, the second action support arm 412 lower edges slides to the protruding 51 domatic tops of pressing piece 5 along domatic, and the contact of movement arm end and fixed terminal 3, connects and connect, generation push button signalling.
Embodiment 2
Fig. 4 is the overall structure explosive view of embodiment 2, as shown in Figure 4, embodiment 2 as in Example 1, comprise upper cover 1, base 2, pressing piece 5, back-moving spring 6, movable terminal 4 and fixed terminal 3, these upper cover about 1 two ends are respectively provided with a button hole 11, be provided with two button holes 11 in bottom simultaneously, and base 2 place corresponding with upper cover 1 button hole 11 is provided with screens 22, upper cover 1 can be fastened with coordinating of screens 22 by button hole 11 with base 2, after fastening, upper cover 1 forms one with base 2 centre and places pressing piece 5, back-moving spring 6, the cavity of movable terminal 4 and fixed terminal 3.This base 2 is provided with a guide pillar 21, guide pillar 21 one end is fixed on base 2, the other end and pressing piece 5 bottom are connected and fixed, back-moving spring 6 is socketed on the guide pillar 21 between base 2 and pressing piece 5, pressing piece 5 top passes upper cover 1 to connect outside keycap, also be provided with at least one projection 51, when pressing piece 5 moves up and down, protruding 51 movement arms that can promote torsion spring make it to swing up and down and realize contacting with fixed terminal 3 or disconnecting.
This fixed terminal 3 and movable terminal 4 are fixed on base 2, and wherein, fixed terminal 3 comprises the pin end 31 be welded and fixed with external circuit, the tip side 33 fixed terminal 3 being fixed on the installation portion 32 on guide pillar 21 and contacting with movable terminal 4.Have the through hole that guide pillar 21 can be allowed to pass in the middle of installation portion 32, fixed terminal 3, by allowing guide pillar 21 through after through hole, is fixed on base 2 bottom surface by the reset squeezing action of back-moving spring 6.In installation portion 32 one end, extend horizontally away and to be arranged on base 2 bottom surface the tip side 33 opposing upper and lower with movement arm, this tip side 33 top is provided with the column contact of upwards placing, and is convenient to contact up and down with movement arm.Be positioned on the right side of tip side 33 front end at base 2 and be provided with a mounting groove, this mounting groove is surrounded by three location walls and base 2 edge and forms, and size just can, by placed within for torsion spring main body, coordinate upper cover 1 torsion spring to be fixed on tip side 33 front end of fixed terminal 3.
As shown in Figure 5, the movement arm of this torsion spring to be extended to fixed terminal 3 direction by the right-hand member of torsion spring and forms the 5th action support arm 421, bend out on protruding 51 tops horizontal and be parallel to the 6th action support arm 422 of base 2 bottom surface, 6th action support arm is positioned at protruding 51 tops, when pressing piece 5 moves up and down, projection can promote the 6th action support arm and move up and down, finally bending extends to upper end, contact and is formed and fixed contact the 7th action support arm 423 opposing upper and lower, torsion spring also comprises pin end 420, passes base 2 outside and be connected with external circuit from one end.
As shown in Figure 6, on the edge that pressing piece 5 bottom is relative with the 6th action support arm 422 position, be provided with protruding 51, when pressing piece 5 not by people for pressing time, the 6th action support arm 422 bottom and protruding 51 upper contact of pressing piece 5, because the elastic reaction of back-moving spring 6,6th action support arm is backed down by protruding 51 tops, the movement arm of movable terminal 4 and the contact separation of fixed terminal 3, connect and disconnect, do not produce signal; When pressing piece 5 by people for pressing time, the elasticity by movement arm is close to protruding 51 tops of pressing piece 5 and is pressed with pressing piece 5 and move down, the contact of movement arm end and fixed terminal 3, connects and connects, and produces push button signalling.
Embodiment 3
Fig. 7 is the overall structure explosive view of embodiment 3, as shown in Figure 7, embodiment 3 is as embodiment 2, comprise upper cover 1, base 2, pressing piece 5, back-moving spring 6, movable terminal 4 and fixed terminal 3, these upper cover about 1 two ends are respectively provided with a button hole 11, be provided with two button holes 11 in bottom simultaneously, and base 2 place corresponding with upper cover 1 button hole 11 is provided with screens 22, upper cover 1 can be fastened with coordinating of screens 22 by button hole 11 with base 2, after fastening, upper cover 1 forms one with base 2 centre and places pressing piece 5, back-moving spring 6, the cavity of movable terminal 4 and fixed terminal 3.This base 2 is provided with a guide pillar 21, guide pillar 21 one end is fixed on base 2, the other end and pressing piece 5 bottom are connected and fixed, back-moving spring 6 is socketed on the guide pillar 21 between base 2 and pressing piece 5, pressing piece 5 top passes upper cover 1 to connect outside keycap, also be provided with at least one projection 51, when pressing piece 5 moves up and down, protruding 51 movement arms that can promote torsion spring make it to swing up and down and realize contacting with fixed terminal 3 or disconnecting.
This fixed terminal 3 and movable terminal 4 are fixed on base 2, wherein, fixed terminal 3 is square metal sheet, is arranged on the opposite side base before fixed terminal being placed torsion spring position, comprises the pin end 31 be welded and fixed with external circuit and the tip side 33 contacted with movable terminal 4.This tip side 33 top of described tip side 33 is provided with the column contact of upwards placing, and be convenient to contact up and down with movement arm, pin end 31 is also extended in its one end, and this pin end 31 passes base 2 and is connected with external circuit.Be positioned at side, tip side 33 front end at base 2 and be provided with a mounting groove, this mounting groove size just can, by placed within for torsion spring main body, coordinate upper cover 1 torsion spring to be fixed on the side of the tip side 33 front end base 2 of movable terminal 4.
As shown in Figure 8, this torsion spring structure is similar to embodiment 2, the movement arm of this torsion spring to be extended to fixed terminal 3 direction by torsion spring and forms the 8th action support arm 431, the 9th action support arm 432 being parallel to base 2 bottom surface is bent out on protruding 51 tops, 9th action support arm 432 is positioned at protruding 51 tops, when pressing piece 5 moves up and down, projection can promote the 9th action support arm and move up and down, finally bending extends to upper end, contact and is formed and fixed contact the tenth action support arm 433 opposing upper and lower, torsion spring also comprises pin end 430, pass base 2 outside from one end and be connected with external circuit.
As shown in Figure 9, on the edge that pressing piece 5 bottom is relative with the 9th action support arm position, be provided with protruding 51, when pressing piece 5 not by people for pressing time, the 9th action support arm bottom and protruding 51 upper contact of pressing piece 5, because the elastic reaction of back-moving spring 6,9th action support arm is backed down by protruding 51 tops, the movement arm of movable terminal 4 and the contact separation of fixed terminal 3, connect and disconnect, do not produce signal; When pressing piece 5 by people for pressing time, the elasticity by movement arm is close to protruding 51 tops of pressing piece 5 and is pressed with pressing piece 5 and move down, the contact of movement arm end and fixed terminal 3, connects and connects, and produces push button signalling.
Figure 10 is the assembled state structural representation of the Switching embodiments 1-2 that use torsion spring described in the utility model is terminal.
As shown in Figure 10, upper cover 1 and base 2 fasten rear formation entirety, and pressing piece 5 stretches out from upper cover 1.And figure below can find out that fixed terminal 3 and the pin end of movable terminal 4 expose base 2 outside, this pin end is connected with external circuit respectively, also comprises fixing press strip 7, and this fixing press strip 7 exposes two ends, for being fixed on keyboard.This base 2 also comprises two erection columns, and the switch being terminal for using torsion spring is located.
In embodiment 2 and embodiment 3, all the be pressed lift effect of part projection and the tip side of fixed terminal of the movement arm of torsion spring disconnects, the reset direction of the movement arm of torsion spring contacts with the tip side of fixed terminal, this design can ensure the good contact of fixed terminal and movable terminal when switch press, simultaneously, the stroke making pressing piece downward does not limit by the conflict after two-terminal contact, provides conveniently for increase pressing stroke and feel.
It should be noted that; the trend of torsion spring movement arm can be made adjustment according to actual conditions; the torsion spring movement arm shape that the present embodiment 1-3 provides is all preferable shape, and any trend on torsion spring movement arm or shape of being applied in is changed and be all the utility model protection range.
Above-described embodiment is only preferably implementation of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these apparent replacement forms all belong to protection range of the present utility model.
Claims (10)
1. the switch using torsion spring to be terminal, comprise upper cover (1), base (2), fixed terminal (3), movable terminal (4) and pressing piece (5), described base (2) is provided with a guide pillar (21), pressing piece (5) be connected to be socketed with back-moving spring guide pillar (21) on, upper cover (1) is exposed for pressing in upper end, upper cover (1) and base (2) fasten and make middle part form a cavity, fixed terminal (3) and movable terminal (4) are arranged in cavity, fixed terminal (3) and one end of movable terminal (4) all pass base (2) and are connected with external circuit, by the contact moving up and down promotion movable terminal (4) action and then control movable terminal (4) and fixed terminal (3) and the disconnection of pressing piece (5), it is characterized in that: described movable terminal (4) is torsion spring (4), and it is arranged on side base being positioned at fixed terminal (3), torsion spring (4) one end passes base for connection, and this end and base are fixed, and torsion spring (4) other end is pressed part (5) control for contacting with fixed terminal (3) as movement arm.
2. the use torsion spring according to claim 1 switch that is terminal, it is characterized in that: described pressing piece (5) extends at least one projection (51) to movable terminal (4) direction, moved by protruding pushing action arm when pressing piece (5) moves up and down and realize contacting with fixed terminal (3) or disconnecting.
3. the use torsion spring according to claim 1 switch that is terminal, it is characterized in that: described fixed terminal (3) comprises tip side (33), described tip side (33) is vertical with base (2) to be arranged, and pressing piece (5) control action arm moves forward and backward and then make movement arm to realize disconnecting or contacting with tip side (33).
4. the use torsion spring according to claim 3 switch that is terminal, it is characterized in that: described fixed terminal (3) also comprises installation portion (32), described installation portion (32) is provided with through hole, fixed terminal (3) is received upper realization of guide pillar (21) by through hole cover and is fixed, the bending of installation portion one end passes base (2) outside downwards and connects for outside line, and other end bending upwards extends to form tip side (33).
5. the use torsion spring according to claim 3 switch that is terminal, it is characterized in that: described base (2) is provided with a torsion spring fixed leg (23) being convenient to the rotation of torsion spring movement arm arranged perpendicular to base (2) bottom surface, and described torsion spring (4) is socketed on torsion spring fixed leg (23).
6. the use torsion spring according to claim 5 switch that is terminal, it is characterized in that: the movement arm of described torsion spring (4) extends in parallel the first action support arm (411) by the upper end of torsion spring (4) higher than tip side (33) level height and base (2) bottom surface, and bend vertically downward at protruding (51) place of corresponding pressing piece (5), extend to below tip side (33) level height and form the second action support arm (412), vertical bending extends to the positive bottom of tip side (33) and forms the 3rd action support arm (413) again, upwards bending makes end extend to the positive front end of tip side (33) and forms four support arm (414) relative with before and after fixed terminal (3) again, form inc hollow structure.
7. the use torsion spring according to claim 1 switch that is terminal, it is characterized in that: described fixed terminal (3) comprises tip side (33), described tip side (33) and base (2) be arranged in parallel, and pressing piece (5) control action arm moves up and down and then makes movement arm contact realize disconnecting or contacting with tip side (33).
8. the use torsion spring according to claim 7 switch that is terminal, it is characterized in that: described fixed terminal (3) also comprises installation portion (32), described installation portion (32) is provided with through hole, fixed terminal (3) is received upper realization of guide pillar (21) by through hole cover and is fixed, the bending of installation portion one end passes base (2) outside downwards and is used for outside line connection, and the other end extends in parallel and forms tip side (33).
9. the use torsion spring according to claim 7 switch that is terminal, it is characterized in that: described base (2) is provided with a mounting groove (24), described torsion spring (4) is laterally fixed in mounting groove (24).
10. the use torsion spring according to claim 9 switch that is terminal; it is characterized in that: the movement arm of described torsion spring (4) to be extended to fixed terminal (3) direction by one end of torsion spring (4) and forms the 5th action support arm (421); bend out the 6th action support arm (422) being approximately parallel to base (2) bottom surface and lifting for protruding (51) on respective protrusions (51) top, finally bending extends to the 7th action support arm (423) that above fixed terminal, formation contacts with fixed terminal tip side; Described 6th action support arm (422) moves up and down and then realizes to open with the end of fixed terminal tip side and contact because whether lifting by protruding (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420695794.3U CN204204703U (en) | 2014-11-19 | 2014-11-19 | A kind of switch using torsion spring to be terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420695794.3U CN204204703U (en) | 2014-11-19 | 2014-11-19 | A kind of switch using torsion spring to be terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204204703U true CN204204703U (en) | 2015-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420695794.3U Active CN204204703U (en) | 2014-11-19 | 2014-11-19 | A kind of switch using torsion spring to be terminal |
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| Country | Link |
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| CN (1) | CN204204703U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505289A (en) * | 2014-11-19 | 2015-04-08 | 余正明 | Switch using torsional spring as terminal |
| WO2016169365A1 (en) * | 2015-04-23 | 2016-10-27 | 余正明 | Ultrathin keyboard switch |
| CN106783322A (en) * | 2016-12-26 | 2017-05-31 | 东莞市凯华电子有限公司 | A kind of key switch with well balanced property |
-
2014
- 2014-11-19 CN CN201420695794.3U patent/CN204204703U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505289A (en) * | 2014-11-19 | 2015-04-08 | 余正明 | Switch using torsional spring as terminal |
| WO2016169365A1 (en) * | 2015-04-23 | 2016-10-27 | 余正明 | Ultrathin keyboard switch |
| CN106783322A (en) * | 2016-12-26 | 2017-05-31 | 东莞市凯华电子有限公司 | A kind of key switch with well balanced property |
| CN106783322B (en) * | 2016-12-26 | 2018-11-02 | 东莞市凯华电子有限公司 | A kind of key switch with well balanced property |
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| C14 | Grant of patent or utility model | ||
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