CN214753476U - Push-button switch - Google Patents

Abstract

The disclosure provides a key switch, and belongs to the field of electrical equipment. The key switch comprises a base, a microswitch, a face cover and a key; the micro switch is positioned in the base; the surface cover is connected with the base and comprises a main body part and a first elastic arm, and the first elastic arm is opposite to the microswitch and can trigger the microswitch when deformed; the key is positioned on one surface of the surface cover, which is far away from the micro switch, and is pivoted with the base, and the key is contacted with one surface of the first elastic arm, which is far away from the micro switch. When the key is pressed, the key can push the first elastic arm to enable the first elastic arm to deform towards the direction close to the microswitch, and the microswitch is pressed by the first elastic arm. Because the key indirectly presses the microswitch through the first elastic arm, the surface of the key does not need to be provided with a long bulge to press the microswitch, the key is simpler to manufacture, the matching relation between the key and the surface cover is simpler, and the manufacture and the assembly of the key switch are simpler and more convenient.

Description

Push-button switch

Technical Field

The present disclosure relates to the field of electrical devices, and more particularly, to a key switch.

Background

The key switch is a switch device which is triggered by pressing a key, and is widely applied to various industries.

A key switch typically includes a base, a face cover, and a key. The face cover is connected with the base, a cavity is formed between the face cover and the base, and the cavity is used for accommodating electric structures such as a microswitch and a circuit board. The face cover is provided with an elastic arm, the key is connected with the base and is in contact with the elastic arm, and the elastic arm is used for providing elastic force for resetting the key. The surface of the key close to the base is provided with a protrusion, and when the key is pressed, the protrusion extends into the cavity through the through hole on the surface of the surface cover to press the microswitch, so that the microswitch is triggered.

Because the protrusion on the surface of the key can only be pressed to the microswitch through the face cover, the key needs to be provided with a longer protrusion, so that the key switch is inconvenient to manufacture and assemble.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a key switch, which can facilitate the manufacturing and the assembly of the key switch. The technical scheme is as follows:

the embodiment of the disclosure provides a key switch, which comprises a base, a microswitch, a face cover and a key;

the micro switch is positioned in the base;

the face cover is connected with the base and comprises a main body part and a first elastic arm, and the first elastic arm is opposite to the microswitch and can trigger the microswitch when deformed;

the key is positioned on one surface of the surface cover, which is far away from the micro switch, and is pivoted with the base, and the key is contacted with one surface of the first elastic arm, which is far away from the micro switch.

Optionally, the main body portion has a first through hole, the first elastic arm is located in the first through hole, and one end of the first elastic arm is connected to a hole wall of the first through hole.

Optionally, the first elastic arm is bent towards a direction close to the key.

Optionally, a face of the first elastic arm close to the microswitch is provided with a first protrusion, and the first protrusion is used for pressing the microswitch.

Optionally, the main body further has a plurality of second through holes, the face cover further includes a plurality of second elastic arms, the second elastic arms correspond to the second through holes one to one, the second elastic arms are located in the corresponding second through holes, one end of each second elastic arm is connected to the hole wall of the corresponding second through hole, and one face, far away from the base, of each second elastic arm is in contact with the corresponding key.

Optionally, the face cover includes a plurality of the second elastic arms, and a part of the second elastic arms extends in the same direction as the first elastic arms, and a part of the second elastic arms extends in the opposite direction to the first elastic arms.

Optionally, the main body portion, the first resilient arm, and the second resilient arm are integrally formed structures.

Optionally, a second protrusion and a third protrusion are arranged on the surface of the key close to the first elastic arm, the second protrusion is in contact with a surface of the first elastic arm far away from the micro switch, and the third protrusion is in contact with a surface of the second elastic arm far away from the base.

Optionally, the base has a first rotating shaft and a second rotating shaft, and the first rotating shaft and the second rotating shaft are respectively located at two sides of the face cover and are parallel to each other;

the button package rubbing board body, first connecting portion and second connecting portion, first connecting portion with the second connecting portion are located the same face of plate body, first connecting portion have circular connecting hole, circular connecting hole cover is in outside the first pivot, the second connecting portion have spacing hole, the major axis in spacing hole with the plate body is nonzero contained angle, spacing hole cover is in outside the second pivot.

Optionally, the first elastic arm is close to the second rotating shaft.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:

through linking to each other face lid and base, make the first elastic arm of face lid relative with micro-gap switch, through with button and base pin joint, make button and first elastic arm keep away from micro-gap switch's a side contact, like this when pressing the button, the button can promote first elastic arm, makes first elastic arm take place to the direction that is close to micro-gap switch and deforms, is pressed micro-gap switch by first elastic arm. Because the key indirectly presses the microswitch through the first elastic arm, the surface of the key does not need to be provided with a long bulge to press the microswitch, the key is simpler to manufacture, the matching relation between the key and the surface cover is simpler, and the manufacture and the assembly of the key switch are simpler and more convenient.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a key switch provided in an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a key switch provided in the embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a face cover according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a key according to an embodiment of the disclosure;

FIG. 5 is a cross-sectional view taken at I-I in FIG. 1.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," "third," and similar terms in the description and claims of the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.

Fig. 1 is a schematic structural diagram of a key switch provided in an embodiment of the present disclosure. As shown in fig. 1, the push switch includes a base 10, a micro switch 20, a face cover 30, and a push button 40.

A microswitch 20 is located in the base 10. The face cover 30 is connected to the base 10, and the face cover 30 includes a main body 301 and a first elastic arm 302. Fig. 2 is a schematic structural diagram of a key switch provided in the embodiment of the present disclosure. The keys 40 are omitted in fig. 2. As shown in fig. 2, the first resilient arm 302 is opposite the microswitch 20 and is capable of triggering the microswitch 20 when deformed.

The push button 40 is located on a side of the face cover 30 away from the micro switch 20, the push button 40 is pivotally connected to the base 10, and the push button 40 contacts a side of the first elastic arm 302 away from the micro switch 20.

Through linking to each other face lid and base, make the first elastic arm of face lid relative with micro-gap switch, through with button and base pin joint, make button and first elastic arm keep away from micro-gap switch's a side contact, like this when pressing the button, the button can promote first elastic arm, makes first elastic arm take place to the direction that is close to micro-gap switch and deforms, is pressed micro-gap switch by first elastic arm. Because the key indirectly presses the microswitch through the first elastic arm, the surface of the key does not need to be provided with a long bulge to press the microswitch, the key is simpler to manufacture, the matching relation between the key and the surface cover is simpler, and the manufacture and the assembly of the key switch are simpler and more convenient.

Fig. 3 is a schematic structural diagram of a face cover according to an embodiment of the present disclosure. As shown in fig. 3, the face cover 30 is rectangular, and the two sides of the face cover 30 are provided with fasteners 304, and the face cover 30 is detachably connected to the base 10 through the fasteners 304, so as to facilitate the assembly and disassembly of the key switch.

The face cover 30 is connected to the base 10, and a receiving cavity is formed between the face cover 30 and the base 10 to receive an electrical structure of the key switch, such as a circuit board 201 shown in fig. 1. The micro switch 20 is located in the accommodating cavity and connected with the circuit board 201. The surface cover 30 can limit the circuit board 201 and prevent the circuit board 201 from loosening. The micro switch 20 is connected with the circuit board 201, so that the micro switch 20 is indirectly limited through the surface cover 30, and the micro switch 20 is prevented from loosening.

As shown in fig. 3, the main body 301 has a first through hole 30a, the first elastic arm 302 is located in the first through hole 30a, and one end of the first elastic arm 302 is connected to the hole wall of the first through hole 30 a.

After the face cover 30 is connected to the base 10, the first through hole 30a corresponds to the micro switch 20, the first elastic arm 302 is located right above the micro switch 20, and when the key 40 pushes the first elastic arm 302 downwards, the first elastic arm 302 deforms and presses the micro switch 20, thereby triggering the micro switch 20.

As shown in fig. 3, the first resilient arm 302 is bent toward the key 40.

After the front cover 30 is connected to the base 10, the first elastic arm 302 is bent toward the key 40, so as to reduce the distance between the first elastic arm 302 and the key 40, and the key 40 can more easily push the first elastic arm 302 to deform when the key 40 is pressed.

As shown in fig. 3, a face of the first elastic arm 302 adjacent to the microswitch 20 has a first protrusion 3021, and the first protrusion 3021 is used for pressing the microswitch 20.

The first protrusion 3021 reduces the distance between the first elastic arm 302 and the micro switch 20, and the first elastic arm 302 can be pressed to the micro switch 20 only by generating a relatively small deformation, so that the key switch is more sensitive.

Optionally, the first protrusion 3021 is in clearance fit with the micro switch 20 to prevent the micro switch 20 from being damaged due to being in a pressed state all the time.

Illustratively, the gap between the first protrusion 3021 and the micro switch 20 is 0.1mm to 0.5 mm. In the embodiment disclosed, the gap between the first protrusion 3021 and the microswitch 20 is 0.3 mm.

As shown in fig. 3, the main body 301 further has a plurality of second through holes 30 b. The face cover 30 further includes a plurality of second elastic arms 303, and the second elastic arms 303 correspond to the second through holes 30b one to one. The second elastic arm 303 is located in the corresponding second through hole 30b, one end of the second elastic arm 303 is connected to the hole wall of the second through hole 30b, and the side of the second elastic arm 303 away from the base 10 contacts with the key 40.

The first resilient arm 302 acts to trigger the microswitch 20 and can also provide a force to reset the key 40, and the second resilient arm 303 can also provide a force to reset the key 40. Through setting up second elastic arm 303, the effort that makes button 40 reset is provided jointly by first elastic arm 302 and second elastic arm 303, make the reset process of button 40 steady more fast, and when pressing button 40, button 40 can promote first elastic arm 302 and second elastic arm 303 and take place deformation together, the effort of button 40 can be shared first elastic arm 302 and second elastic arm 303, can reduce first elastic arm 302 because the atress is too big and the possibility of damaging, be favorable to prolonging key switch's life.

In addition, the first elastic arm 302 and the second elastic arm 303 are supported at different positions of the key 40, so that the key 40 can be more stable when not pressed.

In the embodiment of the present disclosure, the face cover 30 includes a plurality of second elastic arms 303, so that the contact point between the face cover 30 and the key 40 is more, and thus the key 40 is more stable.

Exemplarily, in the embodiment of the present disclosure, the face cover 30 includes 5 second elastic arms 303. The 3 second elastic arms 303 are sequentially distributed at intervals along one side edge of the rectangular face cover 30, the first elastic arm 302 and the other two second elastic arms 303 are distributed at intervals along the other side edge of the rectangular face cover 30, and the first elastic arm 302 is located between the other two second elastic arms 303.

As shown in fig. 3, the extension direction of a part of the second elastic arm 303 is the same as the extension direction of the first elastic arm 302, and the extension direction of a part of the second elastic arm 303 is opposite to the extension direction of the first elastic arm 302.

In the embodiment of the present disclosure, the 3 second elastic arms 303 located at one side edge of the face cover 30 extend in the opposite direction to the first elastic arms 302 and the 2 second elastic arms 303 located at the other side edge of the face cover 30. When the elastic arm with the single extending direction supports the key 40, the acting force on the key 40 can enable the key 40 to generate a certain inclination, and the elastic arm with the opposite extending direction is arranged to support the key 40, so that the key 40 can be more stable when not pressed.

Optionally, the main body portion 301, the first resilient arm 302 and the second resilient arm 303 are an integrally formed structural member. The face cover 30 is formed by integral molding, and has simple structure, easy manufacture, suitability for mass production and low manufacturing cost.

Illustratively, the face cover 30 is injection molded from an insulating plastic material. The first elastic arm 302 and the second elastic arm 303 can be deformed under the action of external force through the elasticity of the material.

Referring to fig. 2, the base 10 has a first rotating shaft 101 and a second rotating shaft 102 parallel to each other, the first rotating shaft 101 and the second rotating shaft 102 are respectively located at two sides of the face cover 30, the first elastic arm 302 is located between the axis of the first rotating shaft 101 and the axis of the second rotating shaft 102, one end of the first elastic arm 302 connected to the main body 301 is close to the first rotating shaft 101, and the other end of the first elastic arm 302 is close to the second rotating shaft 102.

Fig. 4 is a schematic structural diagram of a key according to an embodiment of the present disclosure. As shown in fig. 4, the key 40 includes a plate body 401, a first connection portion 404, and a second connection portion 405. The first connecting portion 404 and the second connecting portion 405 are located on the same surface of the plate body 401, the first connecting portion 404 is pivoted with the first rotating shaft 101, the second connecting portion 405 has a limiting hole 405a, the second rotating shaft 102 is located in the limiting hole 405a, and a gap is formed between the second rotating shaft 102 and the hole wall of the limiting hole 405 a.

The first connection portion 404 has a circular connection hole 404a, and the circular connection hole 404a is sleeved outside the first rotation shaft 101. FIG. 5 is a cross-sectional view taken at I-I in FIG. 1. Fig. 5 shows the connection of the first connection portion 404 to the first rotating shaft 101, and the connection of the second connection portion 405 to the second rotating shaft 102. As shown in fig. 5, the circular connecting hole 404a of the first connecting portion 404 is sleeved outside the first rotating shaft 101, so that the key 40 is pivotally connected to the base 10, and since a gap is formed between the second connecting portion 405 and the hole wall of the limiting hole 405a, the key 40 can rotate around the first rotating shaft 101 within a certain range in the process of pressing the key 40. When the key 40 is pressed to rotate the key 40 around the first rotating shaft 101, the second rotating shaft 102 and the second connecting portion 405 move relatively, the second rotating shaft 102 moves in the limiting hole 405a, and the size of the gap between the second rotating shaft 102 and the hole wall of the limiting hole 405a limits the range of relative movement between the second rotating shaft 102 and the second connecting portion 405, so that the purpose of limiting the rotation range of the key 40 is achieved, and the key 40 can only rotate within a certain range.

Illustratively, in the embodiment of the present disclosure, the limiting hole 405a is an ellipse, and a long axis of the limiting hole 405a forms a non-zero included angle with the plate body 401. In the embodiment of the present disclosure, an included angle between a long axis of the limiting hole 405a and the plate 401 is 90 °.

In other examples, the restraint aperture 405 may also be other shapes, such as circular, rectangular, and the like.

As shown in fig. 4, the first connection portion 404 has a plate shape, the first connection portion 404 has a first bayonet 404b, the first bayonet 404b extends from an edge of the first connection portion 404 to the circular connection hole 404a, and when the first connection portion 404 and the first rotation shaft 101 are connected, the first rotation shaft 101 is inserted into the circular connection hole 404a from the first bayonet 404 b.

The first connecting portion 404 further has a U-shaped notch 404c, the U-shaped notch 404c is located at the edge of the circular connecting hole 404a close to the plate body 401, and after the U-shaped notch 404c is arranged, when the first rotating shaft 101 and the first connecting portion 404 are connected, the first bayonet 404b is more easily deformed, so that the first rotating shaft 101 is clamped into the circular connecting hole 404 a.

As shown in fig. 4, the second connection portion 405 is also plate-shaped, the second connection portion 405 has a second bayonet 405b, the second bayonet 405b extends from an edge of the second connection portion 405 to the stopper hole 405a, and when the second connection portion 405 and the second rotation shaft 102 are connected, the second rotation shaft 102 is inserted into the stopper hole 405a from the second bayonet 405 b.

The key 40 may include a plurality of first connection portions 404 and a plurality of second connection portions 405, and the connection between the key 40 and the base 10 is more stable by providing the plurality of first connection portions 404 and the plurality of second connection portions 405. The first rotating shaft 101 may be a longer shaft, the plurality of first connecting portions 404 are connected to one first rotating shaft 101, the first rotating shaft 101 may also be a shorter shaft, the base 10 has a plurality of first rotating shafts 101, and each first connecting portion 404 is connected to a corresponding one of the first rotating shafts 101. The second rotating shaft 102 may also be a longer shaft, the plurality of second connecting portions 405 are all connected to one second rotating shaft 102, the second rotating shaft 102 may also be a shorter shaft, the base 10 has a plurality of second rotating shafts 102, and each second connecting portion 405 is connected to a corresponding second rotating shaft 102.

As shown in fig. 5, the first elastic arm 302 is close to the second rotating shaft 102. In the embodiment of the present disclosure, 3 second elastic arms 303 are located at the side of the face cover 30 close to the first rotating shaft 101, and the first elastic arm 302 and the other 2 second elastic arms 303 are located at the side of the face cover 30 close to the second rotating shaft 102. When the key 40 is pressed, the key 40 rotates around the first rotating shaft 101, the travel of the area of the key 40 close to the second rotating shaft 102 is large, the first elastic arm 302 is arranged at a position close to the second rotating shaft 102, and the first elastic arm 302 can generate large deformation under the action of the key 40 to trigger the microswitch 20.

As shown in fig. 4, the surface of the key 40 adjacent to the first elastic arm 302 has a second protrusion 402 and a third protrusion 403. The second protrusion 402 contacts a face of the first resilient arm 302 remote from the microswitch 20. The third protrusion 403 contacts with a surface of the second elastic arm 303 away from the base 10.

When the key 40 is pressed, the second protrusion 402 can push the first elastic arm 302 to deform, so as to trigger the micro switch 20, and the third protrusion 403 can push the second elastic arm 303 to deform. Since the second protrusion 402 and the third protrusion 403 protrude from the surface of the plate 401 of the key 40, the first elastic arm 302 and the second elastic arm 303 are more easily kept in contact with the key 40 and are also more easily deformed by the pushing of the key 40. In the disclosed embodiment, the second protrusion 402 has a much shorter length than the prior art push switch, since the second protrusion 402 only needs to contact the first resilient arm 302 and does not need to contact the micro switch 20 through the face cover 30 when the push button 40 is pressed.

Optionally, there is an interference fit between 3 second elastic arms 303 close to the first rotating shaft 101 and the corresponding third protrusions 403. I.e. in the case where the key 40 is not pressed, the 3 second resilient arms 303 are in a deformed state with pressure between them and the corresponding third protrusions 403. For example, in the state where the key 40 is not pressed, the 3 second elastic arms 303 have a deformation of 0.2 mm. That is, even if the key 40 is not pressed, the 3 second elastic arms 303 are deformed by 0.2mm, and can generate a certain elastic force. This enables the key 40 to maintain a sprung state in a state where it is not depressed, and is less likely to rattle.

Optionally, the first elastic arm 302 and the second protrusion 402, and the 2 second elastic arms 303 close to the second rotating shaft 102 and the corresponding third protrusions 403 are also in interference fit. Therefore, the 6 elastic arms can keep the button 40 in a bouncing state under the state that the button is not pressed down, and the button is not easy to shake. In the embodiment of the present disclosure, in a state where the key 40 is not pressed, the first elastic arm 302 and the 2 second elastic arms 303 are also deformed by 0.2 mm.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims (10)

1. A key switch is characterized by comprising a base (10), a microswitch (20), a face cover (30) and a key (40);

the microswitch (20) is positioned in the base (10);

the face cover (30) is connected with the base (10), the face cover (30) comprises a main body part (301) and a first elastic arm (302), and the first elastic arm (302) is opposite to the microswitch (20) and can trigger the microswitch (20) when deformed;

the key (40) is positioned on one surface of the face cover (30) far away from the microswitch (20) and is pivoted with the base (10), and the key (40) is contacted with one surface of the first elastic arm (302) far away from the microswitch (20).

2. The key switch according to claim 1, wherein the main body (301) has a first through hole (30a), the first elastic arm (302) is located in the first through hole (30a), and one end of the first elastic arm is connected to the wall of the first through hole (30 a).

3. A key switch according to claim 2, characterised in that the first resilient arm (302) is bent in a direction towards the key (40).

4. A push-button switch according to claim 2, characterised in that the first resilient arm (302) has a first projection (3021) on a side thereof adjacent to the microswitch (20), said first projection (3021) being adapted to press the microswitch (20).

5. The key switch according to any one of claims 1 to 4, wherein the main body (301) further has a plurality of second through holes (30b), the face cover (30) further includes a plurality of second elastic arms (303), the second elastic arms (303) correspond to the second through holes (30b) one by one, the second elastic arms (303) are located in the corresponding second through holes (30b), and one end of each second elastic arm is connected to a hole wall of the corresponding second through hole (30b), and one face of each second elastic arm (303), which is far away from the base (10), is in contact with the key (40).

6. A key switch according to claim 5, characterised in that said face cover (30) comprises a plurality of said second resilient arms (303), part of said second resilient arms (303) extending in the same direction as the first resilient arms (302), part of said second resilient arms (303) extending in the opposite direction to the first resilient arms (302).

7. A key switch according to claim 6, characterised in that the main body portion (301), the first resilient arm (302) and the second resilient arm (303) are an integrally formed structural part.

8. A key switch according to claim 5, characterised in that the surface of the key (40) adjacent to the first resilient arm (302) has a second protrusion (402) and a third protrusion (403), the second protrusion (402) being in contact with the face of the first resilient arm (302) remote from the microswitch (20), and the third protrusion (403) being in contact with the face of the second resilient arm (303) remote from the base (10).

9. The key switch according to any one of claims 1 to 4, wherein the base (10) has a first rotating shaft (101) and a second rotating shaft (102) which are parallel to each other, the first elastic arm (302) is located between the axis of the first rotating shaft (101) and the axis of the second rotating shaft (102), one end of the first elastic arm (302) connected with the main body portion (301) is close to the first rotating shaft (101), and the other end of the first elastic arm (302) is close to the second rotating shaft (102);

the button (40) includes plate body (401), first connecting portion (404) and second connecting portion (405), first connecting portion (404) with second connecting portion (405) are located the coplanar of plate body (401), first connecting portion (404) with first pivot (101) pin joint, second connecting portion (405) have spacing hole (405a), second pivot (102) are located in spacing hole (405a), and with the clearance has between the pore wall of spacing hole (405 a).

10. The key switch according to claim 9, wherein the first connecting portion (404) has a plate shape and has a circular connecting hole (404a) and a first bayonet (404b), the first bayonet (404b) extends from an edge of the first connecting portion (404) to the circular connecting hole (404a), and the circular connecting hole (404a) is sleeved outside the first rotating shaft (101).

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