CN211376478U

CN211376478U - Ultra-thin key switch

Info

Publication number: CN211376478U
Application number: CN201922337302.9U
Authority: CN
Inventors: 吴福喜; 吕攀豪
Original assignee: Dongguan Kaihua Electronics Co Ltd
Current assignee: Dongguan Kaihua Electronics Co Ltd
Priority date: 2019-12-21
Filing date: 2019-12-21
Publication date: 2020-08-28
Anticipated expiration: 2029-12-21
Also published as: TWM612989U

Abstract

The utility model discloses an ultra-thin key switch, including a base, set up in an upper cover of base top, a static contact and with the corresponding movable contact elastic component that sets up of static contact, this movable contact elastic component one end extends to the upper cover, triggers movable contact elastic component one end and static contact or separation by this upper cover. The utility model provides an ultra-thin key switch, thickness is thin, has and presses down sound producing effect, promotes the user impression.

Description

Ultra-thin key switch

Technical Field

The utility model relates to a key switch field especially relates to an ultra-thin key switch.

Background

In the existing key switch, a guide core is usually arranged in the key switch to trigger the contact and separation of a movable contact piece and a static contact piece, so that the on-off function of the key switch is realized. The height of the guide core structure is high, and more internal space is occupied, so that the thickness of the key switch is thick, and the key switch is difficult to thin.

Meanwhile, due to the limitation of the internal space of the thin key switch, the pressing sound cannot be provided like a large key switch all the time.

SUMMERY OF THE UTILITY MODEL

To the above, it is not enough that an object of the utility model is to provide an ultra-thin key switch, thickness is thin, has and presses down sound producing effect, promotes the user impression.

The utility model discloses a reach the technical scheme that above-mentioned purpose adopted and be:

an ultrathin key switch comprises a base, an upper cover arranged above the base, a static contact piece and a movable contact elastic piece arranged corresponding to the static contact piece, and is characterized in that one end of the movable contact elastic piece extends to the upper cover, and one end of the movable contact elastic piece is triggered by the upper cover to be in contact with or separated from the static contact piece.

As a further improvement of the utility model, a clamping position is formed on the lower end surface of the upper cover, and one end of the movable contact elastic piece is clamped into the clamping position.

As a further improvement of the utility model, the lower end surface of the upper cover extends downwards to form a clamping hook, and the clamping position is formed on the clamping hook.

As a further improvement of the utility model, the movable contact elastic component is a torsional spring, and this first torsional spring mainly comprises a first spring body, connects in a connecting terminal of first spring body one end and connects in a contact part that switches on of the first spring body other end, and this contact part that should switch on extends to the upper cover, the static contact is located the contact part below that switches on.

As a further improvement of the present invention, the end of the conductive contact portion has an extending portion bent upward and extending to the upper cover.

As a further improvement of the utility model, a first recess that supplies the embedding of first spring body and a first movable groove that supplies to switch on the contact site activity from top to bottom are formed respectively on the base, and this connecting terminal runs through first recess and electricity is connected to the PCB board.

As a further improvement of the utility model, the static contact sets up on the base, and the lower extreme of this static contact runs through the base and is connected to the PCB board electrically.

As a further improvement, the connecting terminal and the static contact are respectively welded and fixed on the PCB, and a first yielding area is arranged at a position corresponding to the first torsion spring on the base.

As a further improvement, the utility model also comprises a balance frame and a sounding elastic part which are arranged between the upper cover and the base, wherein the balance frame is provided with a pressing block, the base is provided with a guiding inclined plane, and under the natural state, one end of the sounding elastic part extends to the lower part of the pressing block and is positioned above the guiding inclined plane.

As a further improvement, the sounding elastic member is a second torsion spring, which is mainly composed of a second spring body and a spring-driven sounding portion connected to the second spring body, and the spring-driven sounding portion extends to the lower portion of the pressing block and the upper portion of the guiding inclined plane.

As a further improvement of the utility model, a second groove for embedding the second spring body and a second movable groove for up-and-down springing of the springing and sounding part are formed on the base.

As a further improvement, the second spring body is fixed on the PCB board, and a second yielding area is provided on the base corresponding to the position of the second torsion spring.

As a further improvement of the utility model, the pressing block is provided with an inclined plane.

As a further improvement, the balancing stand is mainly formed by a balancing pole a and a balancing pole B which are arranged alternately, the lower end of the balancing pole a and the lower end of the balancing pole B are respectively arranged on the base, and the upper end of the balancing pole a and the upper end of the balancing pole B are respectively arranged on the upper cover.

As a further improvement of the utility model, a return spring is arranged on the base and below the upper cover.

As a further improvement of the utility model, an opening has been seted up at the base middle part, is provided with a LED lamp of electricity connection on the PCB board at this opening part.

The utility model has the advantages that:

(1) the upper cover is used as a pressing trigger to trigger the on-off of the novel conduction structure, and compared with the traditional guide core pressing structure, the novel conduction structure has the advantages that the internal structure is simplified, the key switch is thinner, and the pressing is balanced and stable; meanwhile, the torsion spring structure is adopted as the movable contact spring, the structure is novel, the torsion spring structure is combined with the upper cover, and the switching-on and switching-off actions are accurately triggered.

(2) Through the pressing block on the balancing stand, guide inclined plane on the base, and the cooperation structural design of sound elastic component, move down the in-process at the balancing stand pressurized, sound elastic component deviates from through the guide inclined plane guide and presses the pressing block, sound elastic component potential energy release strikes the base, or base and balancing stand and sound, make full use of key switch inner space, can be under key switch thinness's prerequisite as far as possible, make key switch have good sense of touch pressing the in-process, and make and can produce sound pressing the in-process, realize the sound production effect, the sound, and the effects are good, and the effect is good, promote user experience.

The above is an overview of the technical solution of the present invention, and the present invention is further explained with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is an exploded view of the first embodiment;

FIG. 2 is a schematic external structural view according to the first embodiment;

FIG. 3 is a schematic view of the combination of the first torsion spring and the upper cover according to the first embodiment;

FIG. 4 is a partial schematic structural diagram according to the first embodiment;

FIG. 5 is a schematic structural diagram of a first torsion spring according to a first embodiment;

FIG. 6 is a schematic structural diagram of a base according to an embodiment;

FIG. 7 is a schematic structural diagram according to a second embodiment;

FIG. 8 is an exploded view of the third embodiment;

FIG. 9 is a schematic partial structure diagram according to the third embodiment;

FIG. 10 is a schematic structural view of a second torsion spring according to the third embodiment;

FIG. 11 is a schematic structural view of a balancing stand according to a third embodiment;

FIG. 12 is a schematic structural diagram of the fourth embodiment.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings and preferred embodiments.

The first embodiment is as follows:

referring to fig. 1 to 4, the present embodiment provides an ultra-thin key switch, which includes a base 1, an upper cover 2 disposed above the base 1, a static contact 4, and a movable contact elastic member 5 disposed corresponding to the static contact 4, wherein one end of the movable contact elastic member 5 extends to the upper cover 2, and the upper cover 2 triggers one end of the movable contact elastic member 5 to contact with or separate from the static contact 4, thereby implementing the on/off function of the key switch.

In this embodiment, as shown in fig. 3, a detent 211 is formed on the lower end surface of the upper cover 2, and one end of the movable contact spring 5 is snapped into the detent 211. Specifically, a hook 21 extends downward from the lower end surface of the upper cover 2, and the locking portion 211 is formed on the hook 21. When the key switch is in a natural state without being pressed, one end of the movable contact elastic piece 5 is lifted upwards by the hook 21 of the upper cover 2, and the movable contact elastic piece 5 is elastically deformed; at this time, the movable contact elastic piece 5 is separated from the static contact piece 4, and the key switch is in an off state. When the upper cover 2 is pressed downwards, the hook 21 moves downwards, and the hook 21 completely or partially releases the upward acting force on one end of the movable contact elastic piece 5, so that the movable contact elastic piece 5 is elastically reset and moves downwards to be contacted with the static contact piece 4, and the key switch is switched on. When the pressing on the upper cover 2 is released, the upper cover 2 moves upwards, the key switch restores to the natural state again, the hook 21 on the upper cover 2 lifts one end of the movable contact elastic piece 5 upwards again to separate the movable contact elastic piece 5 from the static contact piece 4, and then the key switch restores to the disconnected state.

In this embodiment, as shown in fig. 4 and 5, the movable contact elastic element 5 is a first torsion spring 5', specifically, the first torsion spring 5' is made of silver copper or copper wire, and has a high energizing rate. The first torsion spring 5' mainly comprises a first spring body 51, a connecting terminal 52 connected to one end of the first spring body 51, and a conducting contact portion 53 connected to the other end of the first spring body 51, wherein the conducting contact portion 53 extends into the locking portion 211 of the locking hook 21 on the upper cover 2, and the static contact 4 is located below the conducting contact portion 53. Meanwhile, an extending portion 530 bent upward and extending to the upper cover 2 is provided at the end of the conductive contact portion 53. When the push switch is in the natural state, the extending portion 530 is lifted by the hook 211 of the upper cover 2, so that the conductive contact portion 53 is separated from the static contact 4, and the push switch is in the off state.

For the installation of the first torsion spring 5', as shown in fig. 4 and fig. 6, a first groove 11 for the first spring 51 to be inserted into and a first movable slot 12 for the conductive contact portion 53 to move up and down are respectively formed on the base 1, and the connection terminal 52 penetrates through the first groove 11 and is electrically connected to the PCB. In the process that the upper cover 2 moves up and down, the conducting contact part 53 moves up and down in the first movable groove 12, so that the contact or the separation with the static contact piece 4 is realized, and the purpose of conducting and disconnecting the key switch is achieved.

Meanwhile, the static contact 4 of the present embodiment is disposed on the base 1, and the lower end of the static contact 4 penetrates through the base 1 and is electrically connected to the PCB.

Meanwhile, as shown in fig. 4, a return spring 6 is disposed on the base 1 and below the upper cover 2, and the return spring 6 provides an elastic restoring force for the upward movement of the upper cover 2.

Meanwhile, an opening 17 is formed in the middle of the base 1, and an LED lamp 7 electrically connected to the PCB is arranged at the opening 17, so that the key switch has a light effect, and user experience is improved.

Example two:

the main difference between the present embodiment and the first embodiment is that, as shown in fig. 7, the connection terminal 52 and the static contact 4 are respectively welded and fixed on the PCB 10, and a first yielding area 13 is disposed on the base 1 at a position corresponding to the first torsion spring 5 'to provide a yielding space for the conductive contact portion 53 of the first torsion spring 5' to move up and down, so as to achieve the contact and separation with the static contact 4.

In the embodiment, the connecting terminal 52 of the first torsion spring 5' and the static contact piece 4 are directly welded and fixed on the PCB board 10, so that the structure of the base 1 is simplified, and the overall thickness of the key switch is reduced.

Example three:

the key switch of the present embodiment is mainly different from the first or second embodiment in that, as shown in fig. 8 and 9, the key switch of the present embodiment further includes a balance frame 3 disposed between the upper cover 2 and the base 1, and a sounding elastic member 8, a pressing block 35 is disposed on the balance frame 3, a guiding inclined surface 14 is disposed on the base 1, and in a natural state, one end of the sounding elastic member 8 extends to a position below the pressing block 35 and above the guiding inclined surface 14.

In the present embodiment, as shown in fig. 9 and 10, the sounding elastic member 8 is a second torsion spring 8', specifically, the second torsion spring 8' is made of stainless steel, that is, a stainless steel torsion spring, the second torsion spring 8' mainly comprises a second spring body 81 and a spring sounding portion 82 connected to the second spring body 81, and the spring sounding portion 82 extends to below the pressing block 35 and above the guiding inclined surface 14. When the balance frame 3 is pressed to move downwards, the pressing block 35 is driven to move downwards, the pressing block 35 presses the elastic sounding part 82 downwards, when the pressing block 35 is pressed to a certain position, the guide inclined plane 14 on the base 1 guides the elastic sounding part 82 to be separated from the pressing block 35, and the elastic sounding part 82 generates elastic movement due to potential energy release to knock the base 1 or the base 1 and the pressing block 35 to make a sound, so that the pressing sounding function and the sound effect are realized.

Meanwhile, the pressing block 35 has an inclined surface 351. When the pressing block 35 is pressed down, the inclined surface 351 is provided to further guide the operation of disengaging the elastic sound generating portion 82 of the second torsion spring 8' from the pressing block 35.

For the installation of the second torsion spring 8', as shown in fig. 6, the base 1 of the present embodiment is formed with a second groove 15 for the second spring body 81 to be inserted into, and a second movable groove 16 for the spring sound-producing portion 82 to be sprung up and down. In the process that the pressing block 35 on the balancing stand 3 is pressed and moved downwards, the elastic sounding part 82 is pressed to move in the second movable groove 16, and after the pressing block 35 is pulled out, the elastic sounding part is elastically moved in the second movable groove 16 to realize the sounding effect.

In the present embodiment, as shown in fig. 11, the balance frame 3 is mainly formed by a balance bar a32 and a balance bar B33 which are arranged in a crossing manner, the lower end 321 of the balance bar a32 and the lower end 331 of the balance bar B33 are respectively arranged on the base 1, and the upper end 322 of the balance bar a32 and the upper end 332 of the balance bar B33 are respectively arranged on the upper cover 2. Specifically, both ends of the lower end 321 of the stabilizer bar a32 and both ends of the lower end 331 of the stabilizer bar B33 are rotatably provided on the base 1 via the rotating shafts (320,330), respectively, and both ends of the upper end 322 of the stabilizer bar a32 and both ends of the upper end 332 of the stabilizer bar B33 are rotatably provided on the upper cover 2 via the rotating shafts (3220,3320), respectively. When the upper cover 2 is pressed to move up and down, acting force is applied to the balancing stand 3, so that the balancing rod A32 and the balancing rod B33 are matched, crossed and vertically swung, pressing balance is achieved, and pressing stability is improved.

Example four:

the main difference between the present embodiment and the third embodiment is that, as shown in fig. 12, the second spring 81 is fixed on the PCB 10, and a second yielding area 18 is disposed on the base 1 corresponding to the second torsion spring 8', and provides a yielding space for the elastic sound-generating portion 82 of the second torsion spring 8' to bounce up and down, and strike the base 1 or the base 1 and the pressing block 35 to generate sound.

In this embodiment, the second spring body 81 of the second torsion spring 8' is fixed on the PCB board 10, so as to simplify the structure of the base 1 and facilitate the overall thickness of the key switch to be thinner.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that other structures obtained by adopting the same or similar technical features as the above embodiments of the present invention are all within the protection scope of the present invention.

Claims

1. An ultrathin key switch comprises a base, an upper cover arranged above the base, a static contact piece and a movable contact elastic piece arranged corresponding to the static contact piece, and is characterized in that one end of the movable contact elastic piece extends to the upper cover, and one end of the movable contact elastic piece is triggered by the upper cover to be in contact with or separated from the static contact piece.

2. The ultra-thin key switch of claim 1, wherein a detent is formed on the lower end surface of the upper cover, and one end of the movable contact spring is engaged in the detent.

3. The ultra-thin key switch of claim 2, wherein a hook extends downward from the lower end surface of the upper cover, and the latch is formed on the hook.

4. The ultra-thin key switch of claim 1, wherein the movable contact spring is a first torsion spring, the first torsion spring mainly comprises a first spring body, a connection terminal connected to one end of the first spring body, and a conductive contact portion connected to the other end of the first spring body, the conductive contact portion extends to the upper cover, and the static contact is located below the conductive contact portion.

5. The ultra-thin key switch of claim 4, wherein the end of the conductive contact portion has an extension bent upward and extending to the upper cover.

6. The ultra-thin keyswitch as claimed in claim 4, wherein the base has a first recess for the first spring to be inserted into and a first movable slot for the conductive contact to move up and down, respectively, and the connection terminal passes through the first recess and is electrically connected to the PCB.

7. The ultra-thin key switch of claim 1, wherein the static contact is disposed on the base, and a lower end of the static contact penetrates the base and is electrically connected to the PCB.

8. The ultra-thin key switch of claim 4, wherein the connection terminal and the static contact are respectively soldered and fixed on the PCB, and a first relief area is formed on the base at a position corresponding to the first torsion spring.

9. The ultra-thin key switch of any one of claims 1 to 8, further comprising a balance frame disposed between the upper cover and the base, and a sounding elastic member, wherein the balance frame is provided with a pressing block, the base is provided with a guiding inclined plane, and in a natural state, one end of the sounding elastic member extends to a position below the pressing block and above the guiding inclined plane.

10. The ultra-thin key switch of claim 9, wherein the elastic sounding element is a second torsion spring, the second torsion spring mainly comprises a second spring body and a sounding part connected to the second spring body, and the sounding part extends to a position below the pressing block and above the guiding inclined plane.

11. The ultra-thin key switch of claim 10, wherein a second groove for the second spring to be inserted into and a second movable groove for the elastic sound-generating portion to be sprung up and down are formed on the base.

12. The ultra-thin key switch of claim 10, wherein the second spring is fixed on the PCB, and a second relief area is formed on the base at a position corresponding to the second torsion spring.

13. The ultra-thin key switch as claimed in claim 9, wherein the pressing block has an inclined surface thereon.

14. The ultra-thin key switch of claim 9, wherein the balancing frame is mainly formed by a balancing rod a and a balancing rod B which are crossed, the lower end of the balancing rod a and the lower end of the balancing rod B are respectively disposed on the base, and the upper end of the balancing rod a and the upper end of the balancing rod B are respectively disposed on the upper cover.

15. The ultra-thin key switch of any one of claims 1 to 8, wherein a return spring is provided on the base below the upper cover.

16. The ultra-thin key switch as claimed in any one of claims 1 to 8, wherein an opening is formed at a central portion of the base, and an LED lamp electrically connected to the PCB is disposed at the opening.