CN218957604U - Key switch - Google Patents

Abstract

The utility model relates to the technical field of electric switches, in particular to a key switch. The key switch comprises a key cap and a base, a circuit board is arranged in the base, and the key cap is movably arranged on the base; a pressing plate is arranged in the key cap, a trigger switch is arranged on the circuit board, and the pressing plate is abutted with the trigger switch; at least one elastic resetting piece is arranged in the base, and the pressing plate is in butt joint with the elastic resetting piece. According to the utility model, the trigger switch, the elastic reset piece and the trigger structure are arranged separately, the pressing plate is arranged between the key cap and the trigger switch, when the key cap is acted by external force, the elastic reset piece generates elastic deformation, the key cap can be pressed to the trigger switch through the pressing plate to trigger the key switch, and after the external force disappears, the pressing plate and the key cap can reset under the action of the restoring force of the elastic reset piece.

Description

Key switch

Technical Field

The utility model relates to the technical field of electric switches, in particular to a key switch.

Background

The key switch is characterized in that a button is used for pushing a transmission mechanism to enable a movable contact to be communicated with or disconnected from a fixed contact and to realize circuit switching, a shaft pin is mostly adopted as a hinge fulcrum, a positioning rocker is arranged in the key switch, when one end of the key switch is pressed by a hand, the key switch is electrified or powered off, a positioning rocker limiting key is reset, when the other end of the key is subjected to secondary pressure, the key switch is reset, the hinge fulcrum technology is adopted, the thrust generated by a heat-deformed heat-sensitive metal sheet is often insufficient, or the displacement of the heat-sensitive metal sheet after overload deformation is insufficient and fails, the key switch is failed due to poor contact, and the service life of the key switch can be influenced.

In view of the foregoing, there is a need for a key switch that can solve the problem that the conventional key switch is prone to poor contact, resulting in malfunction of the key switch, so as to enhance the practicality of the key switch and prolong the service life thereof.

Disclosure of Invention

The utility model aims to solve the problem that the prior key switch is easy to be in poor contact, so that the key switch is out of order, thereby enhancing the practicability of the key switch and prolonging the service life of the key switch. Aiming at the problems existing in the prior art, the utility model provides a key switch.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a key switch comprises a key cap and a base, wherein a circuit board is arranged in the base, and the key cap is movably arranged on the base; a pressing plate is arranged in the key cap, a trigger switch is arranged on the circuit board, and the pressing plate is abutted with the trigger switch; and at least one elastic reset piece is arranged in the base, and the pressing plate is in butt joint with the elastic reset piece.

Optionally, a bottom plate is arranged between the keycap and the base, the bottom plate is detachably connected with the base, and the circuit board is arranged on the bottom plate; the bottom plate is provided with a clamping part, a clamping groove is formed in one side, close to the bottom plate, of the pressing plate, and the clamping part is matched with the clamping groove in a clamping mode.

Optionally, a part of the structure of the clamping part is a columnar structure, and the clamping groove is an omega-shaped groove.

Optionally, a connecting piece is arranged between the pressing plate and the keycap, and the connecting pieces are respectively arranged at two opposite ends of the pressing plate.

Optionally, a through hole is formed in the bottom plate, the through hole corresponds to a position of the trigger switch on the circuit board, and the trigger switch extends out of the upper surface of the bottom plate through the through hole.

Optionally, one end of the elastic restoring element is fixed on the bottom plate, and the other end of the elastic restoring element is tilted towards the direction away from the upper surface of the bottom plate.

Optionally, a convex part is arranged at the other end of the elastic reset piece, a groove is arranged on the pressing plate, and the convex part is abutted with the groove.

Optionally, the elastic restoring piece and the bottom plate are integrally formed.

Optionally, at least one elastic reset piece is respectively arranged on the upper surface of the bottom plate at the positions corresponding to the two ends of the pressing plate.

Optionally, a limiting part is arranged on the keycap, a limiting hole is formed in the pressing plate, and the limiting part is in clamping fit with the limiting hole.

In summary, by adopting the technical scheme, the key switch has the following beneficial effects:

1. the utility model provides a key switch, which comprises a key cap and a base, wherein a circuit board is arranged in the base, and the key cap is movably arranged on the base; a pressing plate is arranged in the key cap, a trigger switch is arranged on the circuit board, and the pressing plate is abutted with the trigger switch; and at least one elastic reset piece is arranged in the base, and the pressing plate is in butt joint with the elastic reset piece. According to the utility model, the trigger switch, the elastic reset piece and the trigger structure are arranged separately, the trigger switch is arranged on the circuit board and penetrates out of the upper surface of the base plate, the pressing plate is arranged between the key cap and the trigger switch, the elastic reset piece is arranged between the pressing plate and the base plate, when the key cap is acted by external force, the elastic reset piece is elastically deformed, the key cap can be pressed to the trigger switch by the pressing plate to finish triggering of the key switch, and after the external force disappears, the pressing plate and the key cap can reset under the action of the restoring force of the elastic reset piece to close the switch.

2. The utility model provides a key switch, wherein a bottom plate is arranged between a key cap and a base of the key switch, the bottom plate is detachably connected with the base, and a circuit board is arranged on the bottom plate; the bottom plate is provided with a clamping part, one side of the pressing plate, which is close to the bottom plate, is provided with a clamping groove, and the clamping part is matched with the clamping groove in a clamping manner so as to fix the pressing plate on the bottom plate.

3. The utility model provides a key switch, part of the structure of a clamping part on a bottom plate is in a columnar structure, a clamping groove of a pressing plate is an omega-shaped groove, the clamping structure is shaped to firmly clamp the pressing plate and the bottom plate together, in addition, the pressing plate is provided with two opposite ends and two opposite sides, the two opposite ends correspond to the positions of a trigger switch and an elastic reset piece, the clamping groove is arranged on the two opposite sides, so that the pressing plate is fixed on the bottom plate through the two opposite sides, and the two opposite ends can be matched with the elastic reset piece to move under the action of external force to trigger the switch and reset the pressing plate.

4. The utility model provides a key switch, wherein a connecting piece is arranged between a pressing plate and a keycap, the connecting pieces are respectively arranged at two opposite ends of the pressing plate, the two opposite ends of the pressing plate correspond to the positions of a trigger switch and an elastic reset piece, and the pressing plate and the keycap are firmly connected together by the connecting piece, so that the keycap of the trigger switch is acted by external force, the external force acts on the two opposite ends of the pressing plate through the keycap, and therefore the corresponding trigger switches at the two opposite ends are acted, and the sensitivity and the practicability of the key switch are enhanced.

5. The utility model provides a key switch, wherein a through hole is arranged on a bottom plate, the through hole corresponds to the position of a trigger switch on a circuit board, and the trigger switch extends out of the upper surface of the bottom plate through the through hole, so that a pressing plate can be pressed to the trigger switch under the action of external force.

6. The utility model provides a key switch, wherein one end of an elastic reset piece is fixed on a bottom plate, the other end of the elastic reset piece is tilted towards the direction deviating from the upper surface of the bottom plate, and the tilted end is elastically deformed and reset under the action of external force so as to realize the function that the key switch is triggered when the key switch is acted by the external force in cooperation with other structures.

7. The utility model provides a key switch, the other end of the elastic reset piece is provided with a convex part, the pressing plate is provided with a groove, the convex part is abutted with the groove, so that one tilted end of the elastic reset piece is fixed at the groove position of the pressing plate, the elastic reset piece can stably deform and reset, the tilted end is prevented from changing position, the elastic supporting effect on the pressing plate is prevented,

8. the utility model provides a key switch, wherein an elastic reset piece and a bottom plate are integrally formed, so that one end of the elastic reset piece is firmly fixed on the bottom plate.

9. The utility model provides a key switch, wherein at least one elastic reset piece is respectively arranged on the upper surface of a bottom plate at the positions corresponding to the two ends of a pressing plate. Elastic resetting pieces are arranged at two ends of the pressing plate, so that the two ends of the pressing plate are at the same height and can be synchronously pressed or reset.

10. The utility model provides a key switch, wherein a limiting part is arranged on a key cap, a limiting hole is formed in a pressing plate, and the limiting part is in clamping fit with the limiting hole so as to limit the key cap and the pressing plate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a key switch part according to a first embodiment of the present utility model;

fig. 2 is an exploded view of a key switch part according to a first embodiment of the present utility model;

fig. 3 is an enlarged schematic view of a clamping structure of a clamping portion and a clamping groove of a key switch according to a first embodiment of the present utility model;

fig. 4 is an exploded view of a key switch part according to a first embodiment of the present utility model;

fig. 5 is an exploded view of a key switch part according to a first embodiment of the present utility model;

fig. 6 is a schematic perspective view of a four-key switch according to a first embodiment of the present utility model.

The attached drawings are used for identifying and describing:

1. a key switch; 2. a key cap; 3. a base; 4. a circuit board; 5. pressing the plate; 6. a bottom plate; 7. a connecting piece;

41. triggering a switch; 31. an elastic reset piece; 61. a clamping part; 51. a clamping groove; 62. a through hole;

311. a convex portion; 511. a groove; 211. a limit part; 411. and a limiting hole.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings and examples of implementation in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, embodiment 1 of the present utility model provides a key switch 1, including a key cap 2 and a base 3, wherein a circuit board 4 is disposed in the base 3, the key cap 2 is movably mounted on the base 3, a pressing plate 5 is disposed in the key cap 2, a trigger switch 41 is disposed on the circuit board 4, the pressing plate 5 abuts against the trigger switch 41, at least one elastic reset member 31 is further disposed in the base 3, and the pressing plate 5 abuts against the elastic reset member 31.

Referring to fig. 1, the key cap 2 may be rectangular as shown in the drawing, or may be circular or other shapes according to practical requirements. The key cap 2 is movably mounted on the base 3, for example, a surrounding edge is convexly arranged at a position, close to the edge, of the key cap 2, and a mounting groove is formed at a position, corresponding to the surrounding edge, of the base 3, so that the surrounding edge of the key cap 2 is mounted at the mounting groove position of the base 3 in a matched manner, the key cap 2 can change position relative to the bottom plate 6 under the action of external force, and when the key cap 2 is pressed down, the key cap 2 moves towards a position close to the substrate.

The trigger switch 41, elastic reset piece 31 and trigger structure separately set up, set up trigger switch 41 on circuit board 4 and wear out the base plate upper surface, push down board 5 sets up between key cap 2 and trigger switch 41, still be provided with at least one elastic reset piece 31 between push down board 5 and the base plate, when key cap 2 receives the exogenic action, elastic reset piece 31 produces elastic deformation, key cap 2 can press trigger switch 41 in order to accomplish the trigger of key switch 1 through push down board 5, after the exogenic disappearance, push down board 5 and key cap 2 can accomplish the reset under the restoring force effect of elastic reset piece 31, in order to close the switch, this structure sets up the problem that traditional key switch 1 can appear contacting failure and lead to the button failure, in order to strengthen key switch 1's practicality and increase its life.

Further, referring to fig. 2, a bottom plate 6 is disposed between the key cap 2 and the base 3, the bottom plate 6 is detachably connected with the base 3, the circuit board is disposed on the bottom plate, a clamping portion 61 is disposed on the bottom plate 6, a clamping groove 51 is disposed on one side of the pressing plate 5, which is close to the bottom plate 6, and the clamping portion 61 is in clamping fit with the clamping groove 51.

It should be understood that the engaging portion 61 and the engaging groove 51 may be provided on the pressing plate 5 and the bottom plate 6, respectively, and the pressing plate 5 may be fixed to the bottom plate 6 without affecting the function of the pressing plate 5.

Specifically, the pressing plate 5 has opposite ends and opposite sides, the trigger switch 41 and the elastic restoring member 31 are provided at the opposite ends, and the catching groove 51 is provided at the opposite sides of the pressing plate 5. Referring to fig. 2 and 3, fig. 2 a is a schematic structural diagram of the clamping portion 61 and the clamping groove 51 clamped together, fig. 3 is an enlarged schematic structural diagram of the portion a in fig. 2, the portion of the clamping portion 61 on the bottom plate 6 is in a columnar structure, the clamping groove 51 is a groove 511 in an Ω shape, referring to fig. 2 and 3, the clamping posts in the columnar structure are provided at the two clamping ends of the bottom plate 6, the clamping groove 51 of the pressing plate 5 is in an Ω shape in the middle of the clamping groove 51, the middle recess of the groove 511 is clamped on the clamping posts, the protruding portions at two sides are inserted into the groove, the secondary structure firmly fixes the pressing plate 5 on the bottom plate 6 through two opposite sides thereof, and at the same time, two ends of the pressing plate 5 can move relative to the bottom plate 6, so that the two opposite ends can cooperate with the elastic reset member 31 to move under the action of external force to realize the triggering of the trigger switch 41 and the reset of the pressing plate 5.

Further, referring to fig. 2, a connecting piece 7 is disposed between the pressing plate 5 and the key cap 2, and the connecting pieces 7 are respectively disposed at two opposite ends of the pressing plate 5.

Specifically, the opposite ends of the pressing plate 5 correspond to the positions of the trigger switch 41 and the elastic restoring member 31, and the connecting member 7 may be a double sided tape or the like, which firmly connects the pressing plate 5 and the key cap 2 together, so that the key cap 2 of the trigger switch 41 is acted upon by an external force, which acts on the opposite ends of the pressing plate 5 through the key cap 2, thereby acting on the trigger switches 41 corresponding to the opposite ends, to enhance the sensitivity and practicality of the switch.

Further, referring to fig. 2 and 4, the bottom plate 6 is provided with a through hole 62, the through hole 62 corresponds to the position of the trigger switch 41 on the circuit board 4, and the trigger switch 41 extends out of the upper surface of the bottom plate 6 through the through hole 62, so that the pressing plate 5 can be pressed to the trigger switch 41 under the action of external force.

Further, referring to fig. 4, one end of the elastic restoring member 31 is fixed on the bottom plate 6, and the other end of the elastic restoring member 31 is tilted toward a direction away from the upper surface of the bottom plate 6.

Specifically, the base plate 6 is provided with a yielding groove corresponding to the position of the elastic restoring member 31, so that one end of the elastic restoring member 31 tilted has a sufficient elastic moving distance, and the triggering of the trigger switch 41 and the restoring of the pressing plate 5 can be realized by matching with the movement of the pressing plate 5.

Further, referring to fig. 4 and 5, the other end of the elastic restoring member 31 is provided with a protrusion 311, the pressing plate 5 is provided with a groove 511, the protrusion 311 abuts against the groove 511, so that the tilted end of the elastic restoring member 31 is fixed at the position of the groove 511 of the pressing plate 5, and thus the elastic restoring member can be stably elastically deformed and restored, the contact effect between the elastic portion and the keycap 2 is ensured, and the tilted end is prevented from changing position, thereby affecting the elastic supporting effect on the pressing plate 5.

Further, with continued reference to fig. 4, the elastic restoring member 31 is integrally formed with the bottom plate 6, and the elastic restoring member 31 may be specifically divided into two parts, including a connecting portion and a movable portion, where the connecting portion and the bottom plate 6 are integrally formed, and one end of the elastic restoring member 31 is firmly fixed on the bottom plate 6, and the movable portion is tilted at a certain angle toward one end far away from the bottom plate 6.

Further, at least one elastic restoring member 31 is disposed on the upper surface of the bottom plate 6 at positions corresponding to two ends of the pressing plate 5. Elastic restoring pieces 31 are provided at both ends of the pressing plate 5 so that both ends thereof are at the same height and can be simultaneously pressed or restored.

In an example, a trigger switch 41 is disposed at the middle position of each of the opposite ends of the pressing plate 5, and an elastic reset member 31 is disposed at each of the opposite ends of the trigger switch 41, so that the pressing plate 5 is stressed uniformly, and is prevented from tilting to one side, and the reset stress of the pressing plate 5 is larger, so that the use effect is better.

Further, referring to fig. 4 and 5, the key cap 2 is provided with a limiting portion 211, the pressing plate 5 is provided with a limiting hole 411, and the limiting portion 211 is in clamping fit with the limiting hole 411.

Referring to fig. 4, a limiting slot is formed at a position of the connecting piece 7 corresponding to the pressing plate 5, and the limiting portion 211 on the key cap 2 penetrates into the limiting hole 411 of the pressing plate 5 through the limiting slot of the connecting piece 7 to limit the connecting piece 7 and the pressing plate 5.

In addition, the number of key caps 2 of the key switch 1 and the number of trigger switches 41 and the like matched with the key caps 2 of the present embodiment may be set according to practical requirements, the key switch 1 may be set to two keys, four keys and the like, and the three-dimensional structure of the four-key switch 1 is referred to fig. 5. The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The key switch comprises a key cap (2) and a base (3), wherein a circuit board (4) is arranged in the base (3), and the key switch is characterized in that the key cap (2) is movably arranged on the base (3); a pressing plate (5) is arranged in the key cap (2), a trigger switch (41) is arranged on the circuit board (4), and the pressing plate (5) is abutted with the trigger switch (41); at least one elastic reset piece (31) is further arranged in the base (3), and the pressing plate (5) is abutted to the elastic reset piece (31).

2. The key switch of claim 1, wherein: a bottom plate (6) is arranged between the keycap (2) and the base (3), the bottom plate (6) is detachably connected with the base (3), and the circuit board is arranged on the bottom plate; the bottom plate (6) is provided with a clamping part (61), one side of the pressing plate (5) close to the bottom plate (6) is provided with a clamping groove (51), and the clamping part (61) is matched with the clamping groove (51) in a clamping mode.

3. The key switch according to claim 2, wherein a part of the engaging portion (61) is a columnar structure, and the engaging groove (51) is an Ω -shaped groove.

4. The key switch according to claim 2, wherein a connecting piece (7) is arranged between the pressing plate (5) and the key cap (2), and the connecting pieces (7) are respectively arranged at two opposite ends of the pressing plate (5).

5. The key switch according to claim 2, characterized in that a through hole (62) is provided in the base plate (6), the through hole (62) corresponds to the position of the trigger switch (41) on the circuit board (4), and the trigger switch (41) extends out of the upper surface of the base plate (6) through the through hole (62).

6. The key switch according to claim 2, wherein one end of the elastic restoring member (31) is fixed on the bottom plate (6), and the other end of the elastic restoring member (31) is tilted in a direction away from the upper surface of the bottom plate (6).

7. The key switch according to claim 6, wherein a protrusion (311) is provided at the other end of the elastic restoring member (31), a groove (511) is provided on the pressing plate (5), and the protrusion (311) abuts against the groove (511).

8. The push-button switch according to claim 6, characterized in that the elastic return element (31) is integrally formed with the base plate (6).

9. The key switch according to claim 6, wherein at least one elastic reset member (31) is respectively arranged on the upper surface of the bottom plate (6) at the positions corresponding to the two ends of the pressing plate (5).

10. The key switch according to claim 1, wherein a limiting portion (211) is arranged on the key cap (2), a limiting hole (411) is formed in the pressing plate (5), and the limiting portion (211) is in clamping fit with the limiting hole (411).

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