CN211376477U - Novel ultra-thin key switch - Google Patents

Abstract

The utility model discloses a novel ultra-thin key switch, comprising a base, an upper cover arranged above the base, a balance frame arranged between the upper cover and the base, a static contact piece, and a dynamic contact elastic member arranged corresponding to the static contact piece, one end of the dynamic contact elastic member extending to the balance frame, and the balance frame triggers one end of the dynamic contact elastic member to contact or separate from the static contact piece. The novel ultra-thin key switch provided by the utility model has a thin thickness, stable pressing balance, and a pressing sound effect, which improves the user experience.

Description

A new type of ultra-thin key switch

technical field

The utility model relates to the field of key switches, in particular to a novel ultra-thin key switch.

Background technique

In the existing key switch, a guide core is usually arranged inside to trigger the contact and separation of the moving contact piece and the static contact piece, so as to realize the on and off functions of the key switch. At the same time, in order to improve the balance of pressing, a corresponding gimbal will be provided to achieve this.

Therefore, the guide core and the balance frame are simultaneously arranged inside the key switch, which occupies a lot of internal space, making the key switch thicker and difficult to be thin.

At the same time, due to the limitation of the internal space of the thin key switch, it is always impossible to have the same pressing sound as the large key switch.

Utility model content

In view of the above deficiencies, the purpose of the present invention is to provide a new type of ultra-thin key switch, which has a thin thickness, stable pressing balance, and has a pressing sound effect to improve user experience.

The technical scheme that the utility model adopts to achieve the above-mentioned purpose is:

A new type of ultra-thin key switch, comprising a base, an upper cover arranged above the base, a balance frame arranged between the upper cover and the base, a static contact piece, and a set corresponding to the static contact piece A movable contact elastic piece is characterized in that one end of the movable contact elastic piece extends to the gimbal, and one end of the movable contact elastic piece is triggered by the gimbal to contact or separate from the static contact piece.

As a further improvement of the present invention, an upper support block is arranged on the balance frame, and one end of the movable contact elastic member is in contact with the upper end surface of the upper support block.

As a further improvement of the present invention, a lower pressure block is arranged on the balance frame, and one end of the movable contact elastic member extends below the lower pressure block.

As a further improvement of the present invention, the movable contact elastic member is a first torsion spring, and the first torsion spring is mainly composed of a first spring body, a connecting terminal connected to one end of the first spring body, and a first torsion spring connected to the first spring body. The other end of the spring body is composed of a conducting contact portion, the conducting contact portion extends to the gimbal, and the static contact piece is located below the conducting contact portion.

As a further improvement of the present invention, an extension portion bent upward and extending to the gimbal is provided at the end of the conducting contact portion.

As a further improvement of the present invention, a first groove for the first spring body to be embedded in and a first movable groove for the conduction contact part to move up and down are respectively formed on the base, and the connection terminal penetrates through the first groove. a groove and is electrically connected to the PCB board.

As a further improvement of the present invention, the static contact piece is disposed on the base, and the lower end of the static contact piece penetrates through the base and is electrically connected to the PCB board.

As a further improvement of the present invention, the connection terminal and the static contact piece are respectively welded and fixed on the PCB board, and a first abdication area is provided on the base at a position corresponding to the first torsion spring.

As a further improvement of the present invention, it also includes a sound-emitting elastic piece, a pressing block is arranged on the balance frame, and a guiding inclined surface is arranged on the base. In a natural state, one end of the sound-emitting elastic piece extends to the bottom of the pressing block and above the guide slope.

As a further improvement of the present invention, the sounding elastic member is a second torsion spring, and the second torsion spring is mainly composed of a second spring body and an elastic sounding part connected to the second spring body. The sounding part extends below the pressing block and above the guiding slope.

As a further improvement of the present invention, a second groove for embedding the second spring body and a second movable groove for the bouncing sounding part to bounce up and down are formed on the base.

As a further improvement of the present invention, the second spring body is fixed on the PCB board, and a second abdication area is defined on the base at a position corresponding to the second torsion spring.

As a further improvement of the present invention, an inclined surface is provided on the pressing block.

As a further improvement of the present invention, the base is provided with a cover plate covering the movable touch elastic member and the sound-emitting elastic member, and the ends of the movable-touch elastic member and the sound-emitting elastic member both extend to the cover outside of the board.

As a further improvement of the present invention, the balance frame is mainly composed of a balance rod A and a balance rod B crossed, the lower end of the balance rod A and the lower end of the balance rod B are respectively set on the base, the balance rod The upper end of A and the upper end of the balance rod B are respectively arranged on the upper cover.

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

As a further improvement of the present invention, an opening is provided in the middle of the base, and an LED light electrically connected to the PCB board is arranged at the opening.

The beneficial effects of the present utility model are:

(1) While the balance frame is used to improve the pressing balance of the key switch, the balance frame also acts as a pressing trigger to trigger the conduction and disconnection of the new conduction structure, which simplifies the internal structure compared with the traditional guide core pressing structure. , make the key switch thinner, and the pressing is balanced and stable; at the same time, the torsion spring structure is used as the moving contact piece, which has a novel structure and is combined with the balance frame, and the on and off actions are triggered accurately.

(2) Through the design of the matching structure of the pressing block on the gimbal, the guiding slope on the base, and the sounding elastic member, in the process of the gimbal moving down under pressure, the sounding elastic member is guided by the guiding slope to escape the pressing The sound-emitting elastic piece can release the potential energy of tapping the base, or the base and the gimbal to make sound, making full use of the internal space of the key switch, and making the key switch as thin as possible, so that the key switch has a good tactile feeling during the pressing process. , and can generate sound during the pressing process to achieve a sound effect, the sound is loud, the effect is good, and the user experience is improved.

The above is an overview of the technical solution of the utility model. The utility model will be further described below with reference to the accompanying drawings and specific embodiments.

Description of drawings

1 is an exploded view of Embodiment 1;

2 is a schematic diagram of the external structure of Embodiment 1;

FIG. 3 is a schematic structural diagram of a part of Embodiment 1;

4 is a schematic structural diagram of a first torsion spring in Embodiment 1;

5 is a schematic structural diagram of a base in Embodiment 1;

6 is a schematic structural diagram of a gimbal in Embodiment 1;

7 is another partial structural schematic diagram of Embodiment 1;

8 is a schematic structural diagram of Embodiment 2;

9 is a schematic structural diagram of Embodiment 3;

10 is an exploded view of the fourth embodiment;

FIG. 11 is a partial structural schematic diagram of Embodiment 4;

12 is a schematic structural diagram of the second torsion spring in the fourth embodiment;

FIG. 13 is a schematic structural diagram of the fifth embodiment.

Detailed ways

In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

Example 1:

Referring to FIGS. 1 to 3 , the present embodiment provides a new type of ultra-thin key switch, which includes a base 1 , an upper cover 2 disposed above the base 1 , and a switch disposed between the upper cover 2 and the base 1 . A balance frame 3 , a static contact piece 4 , and a movable contact elastic member 5 corresponding to the static contact piece 4 . One end of the movable contact elastic member 5 extends to the balance frame 3 , and the balance frame 3 triggers the movable contact elastic member 5 One end of 5 is in contact with or separated from the static contact piece 4, so as to realize the on and off functions of the key switch.

In this embodiment, as shown in FIG. 3 , an upper support block 31 is provided on the balance frame 3 , and one end of the movable contact elastic member 5 is in contact with the upper end surface of the upper support block 31 . When the key switch is in the unpressed natural state, the gimbal 3 is in the natural state, and the upper support block 31 on the gimbal 3 lifts one end of the movable elastic member 5 upward, and the movable elastic member 5 is elastically deformed; , the movable contact elastic member 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 down to drive the balance frame 3 to move down, the upper support block 31 on the balance frame 3 moves down along with it, and the upper support block 31 completely or partially releases the lifting effect on one end of the movable contact elastic member 5 force, so that the movable contact elastic member 5 elastically resets and moves down to contact with the static contact piece 4, and the key switch is turned on. When the pressing on the upper cover 2 is released, the key switch returns to its natural state, and the upper support block 31 on the balance frame 3 lifts one end of the movable contact elastic member 5 upward again, so that the movable contact elastic member 5 and the static contact piece 4 are lifted up again. separation, the key switch returns to the off state.

In this embodiment, as shown in FIG. 3 and FIG. 4 , the movable contact elastic member 5 is a first torsion spring 5'. Specifically, the first torsion spring 5' is made of silver-copper material or copper wire. Has a high electrification rate. The first torsion spring 5 ′ is mainly composed of a first spring body 51 , a connecting terminal 52 connected to one end of the first spring body 51 , and a conductive contact portion 53 connected to the other end of the first spring body 51 . The conductive contact portion 53 extends to the upper support block 31 of the gimbal 3 and is in contact with the upper end surface of the upper support block 31 . The static contact piece 4 is located below the conductive contact portion 53 . At the same time, there is an extension portion 530 bent upward and extending to the gimbal 3 at the end of the conducting contact portion 53 . When the key switch is in a natural state, the upper support block 31 on the gimbal 3 lifts the extending portion 530, so that the conducting contact portion 53 is separated from the static contact piece 4, and the key switch is in an off state.

For the installation of the first torsion spring 5 ′, as shown in FIG. 3 and FIG. 5 , in this embodiment, a first groove 11 for embedding the first spring body 51 is formed on the base 1 respectively, and a first groove 11 for guiding Through a first movable groove 12 that moves up and down through the contact portion 53 , the connecting terminal 52 penetrates through the first groove 11 and is electrically connected to the PCB board. When the upper support block 31 on the gimbal 3 moves up and down, the conductive contact portion 53 moves up and down in the first movable slot 12, so as to contact or separate from the static contact piece 4, and the key switch can be turned on or off. the goal of.

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

In this embodiment, as shown in FIG. 6 , the balance frame 3 is mainly composed of a balance rod A32 and a balance rod B33 that are crossed. The lower end 321 of the balance rod A32 and the lower end 331 of the balance rod B33 are respectively arranged at On the base 1 , the upper end 322 of the balance rod A32 and the upper end 332 of the balance rod B33 are respectively disposed on the upper cover 2 . Specifically, the two ends of the lower end 321 of the balance rod A32 and the two ends of the lower end 331 of the balance rod B33 are respectively rotated and arranged on the base 1 through the rotating shafts (320, 330), and the two ends of the upper end 322 of the balance rod A32 and the balance rod B33 Both ends of the upper end 332 are rotatably arranged on the upper cover 2 through rotating shafts (3220, 3320). When the upper cover 2 is pressed to move up and down, a force is applied to the balance frame 3, so that the balance bar A32 and the balance bar B33 cooperate to swing up and down in a crosswise manner, so as to achieve pressing balance and improve pressing stability.

At the same time, as shown in FIG. 7 , a return spring 6 is provided on the base 1 and below the upper cover 2 , and the return spring 6 provides elastic restoring force for the upward movement and reset of the upper cover 2 . When reset, drive the balance frame 3 to swing up to reset.

At the same time, an opening 17 is opened in the middle of the base 1, and an LED light 7 electrically connected to the PCB is arranged at the opening 17, so that the key switch has a lighting effect and improves user experience.

Embodiment 2:

The main difference between this embodiment and the first embodiment is that, as shown in FIG. 8 , a lower pressure block 34 is provided on the balance frame 3 , and one end of the movable contact elastic member 5 extends below the lower pressure block 34 . Specifically, The extension portion 530 of the movable elastic member 5 extends below the lower pressing block 34 .

When the key switch is in a non-pressed natural state, the gimbal 3 is in a natural state, and the extension 530 of the conductive contact portion 53 is located below the lower pressing block 34; at this time, the conductive contact portion 53 of the movable contact elastic member 5 is in the static contact When the sheet 4 is separated, the key switch is in an off state. When the upper cover 2 is pressed down to drive the balance frame 3 to move down, the lower pressure block 34 on the balance frame 3 moves down along with it, and the lower pressure block 34 presses the extension portion 530 down, which drives the conductive contact portion 53 to move down. The elastic deformation makes the conductive contact portion 53 contact the static contact piece 4, and the key switch is turned on. When the pressing on the upper cover 2 is released, the key switch returns to its natural state, and the pressing block 34 on the gimbal 3 moves upward to release the pressing on the extension portion 530 , so that the conductive contact portion 53 is elastically reset, and the static contact When the sheet 4 is separated, the key switch returns to the off state.

Embodiment three:

The main difference between this embodiment and Embodiment 1 or Embodiment 2 is that, as shown in FIG. A first abdication area 13 is provided at the position of the first torsion spring 5', which provides a space for the conduction contact portion 53 of the first torsion spring 5' to move up and down to achieve contact and separation with the static contact piece 4. .

In this embodiment, the connection terminal 52 of the first torsion spring 5 ′ and the static contact piece 4 are directly welded and fixed on the PCB board 10 , which simplifies the structure of the base 1 and facilitates a thinner overall thickness of the key switch.

Embodiment 4:

The main difference between this embodiment and any one of the first to third embodiments is that, as shown in FIG. 10 and FIG. 11 , the key switch of this embodiment further includes a sound-emitting elastic member 8 , which is provided on the balance frame 3 There is a pressing block 35 , and a guiding inclined surface 14 is provided on the base 1 . In a natural state, one end of the sounding elastic member 8 extends below the pressing block 35 and is located above the guiding inclined surface 14 .

In this embodiment, specifically, as shown in FIG. 11 and FIG. 12 , the sounding elastic member 8 is a second torsion spring 8 ′. Specifically, the second torsion spring 8 ′ is made of stainless steel, that is, stainless steel. A torsion spring, the second torsion spring 8' is mainly composed of a second spring body 81 and an elastic sounding part 82 connected to the second spring body 81. The elastic sounding part 82 extends to the bottom of the pressing block 35 and the guide Above the lead slope 14. When the gimbal 3 is pressed down, it drives the pressing block 35 to move down, and the pressing block 35 presses the bouncing sounding part 82 down. When it is pressed down to a certain position, the guiding slope 14 on the base 1 guides the bouncing sounding part 82 comes out of the pressing block 35, and the bouncing sounding part 82 bounces due to the release of potential energy and taps the base 1, or the base 1 and the pressing block 35 to make a sound, so as to realize the function of pressing and sounding, the sound is loud and the effect is good.

Meanwhile, the pressing block 35 has an inclined surface 351 . When the pressing block 35 is pressed down, the setting of the inclined surface 351 further guides the movement of the bouncing sounding portion 82 of the second torsion spring 8 ′ to escape from the pressing block 35 .

For the installation of the second torsion spring 8 ′, as shown in FIG. 5 , in this embodiment, a second groove 15 for embedding the second spring body 81 and a spring sounding portion 82 are formed on the base 1 in this embodiment. A second movable slot 16 that bounces up and down. When the pressing block 35 on the gimbal 3 is pressed and moved downward, the elastic sounding part 82 is pressed to move in the second movable groove 16 , and after the pressing block 35 is released, it bounces in the second movable groove 16 to produce sound Effect.

As shown in FIG. 7 , the base 1 is provided with a cover plate 9 covering the movable touch elastic member 5 and the sounding elastic member 8 . Specifically, the cover plate 9 may be a metal cover. Both the end of the element 5 and the end of the sounding elastic element 8 extend to the outside of the cover plate 9 . The movable contact elastic member 5 and the sounding elastic member 8 are limited by the cover plate 9, specifically, the first torsion spring 5' and the second torsion spring 8' are limited, so that the first torsion spring 5' is in conductive contact The part 53 and the elastic sounding part 82 of the second torsion spring 8' move within a certain space, thereby improving the accuracy of the conduction and sounding function of the key switch. At the same time, when the bouncing sounding part 82 bounces, the cover plate 9 is also knocked to make a sound.

Embodiment 5:

The main difference between this embodiment and the fourth embodiment is that, as shown in FIG. 13 , the second spring body 81 is fixed on the PCB board 10 and corresponds to the position of the second torsion spring 8 ′ on the base 1 There is a second abdication area 18 there, which provides an escape space for the bouncing sounding part 82 of the second torsion spring 8' to bounce up and down, knocking the base 1, or the base 1 and the pressing block 35 to make a sound.

In this embodiment, the second spring body 81 of the second torsion spring 8 ′ is fixed on the PCB board 10 , which simplifies the structure of the base 1 and facilitates a thinner overall thickness of the key switch.

The above are only preferred embodiments of the present utility model, and do not limit the technical scope of the present utility model. Therefore, the same or similar technical features as the above-mentioned embodiments of the present utility model are adopted, and other structures are obtained. within the scope of protection of the present invention.

Claims (17)

1. A new type of ultra-thin key switch, comprising a base, an upper cover arranged above the base, a balance frame arranged between the upper cover and the base, a static contact piece, and a static contact piece. A corresponding movable contact elastic piece is characterized in that one end of the movable contact elastic piece extends to the balance frame, and the balance frame triggers one end of the movable contact elastic piece to contact or separate from the static contact piece. 2 . The novel ultra-thin key switch according to claim 1 , wherein an upper support block is arranged on the balance frame, and one end of the movable contact elastic member is in contact with the upper end surface of the upper support block. 3 . 3 . The novel ultra-thin key switch according to claim 1 , wherein a lower pressure block is arranged on the balance frame, and one end of the movable contact elastic member extends below the lower pressure block. 4 . 4. The novel ultra-thin key switch according to any one of claims 1 to 3, wherein the movable contact elastic member is a first torsion spring, and the first torsion spring is mainly composed of a first spring body, connecting It consists of a connecting terminal at one end of the first spring body and a conducting contact portion connected to the other end of the first spring body. The conducting contact portion extends to the balance frame, and the static contact piece is located below the conducting contact portion. 5 . The novel ultra-thin key switch according to claim 4 , wherein an end portion of the conductive contact portion has an extension portion that is bent upward and extends to the gimbal. 6 . 6 . The novel ultra-thin key switch according to claim 4 , wherein a first groove for the first spring body to be embedded in, and a first groove for the conduction contact portion to move up and down are respectively formed on the base. 7 . A first movable groove, the connecting terminal penetrates through the first groove and is electrically connected to the PCB board. 7. The novel ultra-thin key switch according to any one of claims 1 to 3, wherein the static contact piece is disposed on the base, and the lower end of the static contact piece penetrates the base and is electrically connected to the PCB plate. 8 . The novel ultra-thin key switch according to claim 4 , wherein the connection terminal and the static contact piece are respectively welded and fixed on the PCB board, and the base corresponds to the position of the first torsion spring. 9 . There is a first give way area. 9. The novel ultra-thin key switch according to any one of claims 1 to 3, further comprising a sound-emitting elastic member, a pressing block is arranged on the balance frame, and a pressing block is arranged on the base. The guiding slope, in a natural state, one end of the sounding elastic member extends below the pressing block and is located above the guiding slope. 10. The novel ultra-thin key switch according to claim 9, wherein the sounding elastic member is a second torsion spring, and the second torsion spring mainly consists of a second spring body and is connected to the second spring body It is composed of a bouncing sounding part, which extends below the pressing block and above the guiding slope. 11. The novel ultra-thin key switch according to claim 10, wherein a second groove for the second spring body to be embedded in and a second groove for the elastic sounding part to bounce up and down are formed on the base. A second active slot. 12. The novel ultra-thin key switch according to claim 10, wherein the second spring body is fixed on the PCB, and a first torsion spring is provided on the base at a position corresponding to the second torsion spring. Two give way area. 13 . The novel ultra-thin key switch according to claim 9 , wherein the pressing block has an inclined surface. 14 . 14 . The novel ultra-thin key switch according to claim 9 , wherein a cover plate covering the movable elastic member and the sound-emitting elastic member is provided on the base, and the movable elastic member has an end. 15 . Both the end portion and the end portion of the sounding elastic element extend to the outside of the cover plate. 15. The novel ultra-thin key switch according to any one of claims 1 to 3, wherein the balance frame is mainly formed by a balance rod A and a balance rod B crossed, and the lower end of the balance rod A is formed. The lower end of the balance rod B and the lower end of the balance rod B are respectively set on the base, and the upper end of the balance rod A and the upper end of the balance rod B are respectively set on the upper cover. 16 . The novel ultra-thin key switch according to claim 1 , wherein a return spring is provided on the base and below the upper cover. 17 . 17. The novel ultra-thin key switch according to any one of claims 1 to 3, wherein an opening is provided in the middle of the base, and an LED light electrically connected to the PCB is provided at the opening .

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