Key switch and keyboard

Abstract

The utility model provides a key switch and a keyboard, and belongs to the technical field of electronic equipment. In the utility model, the base extends towards the direction close to the surface cover to form a first groove body, the base extends towards the direction far away from the surface cover to form a second groove body, the second groove body and the first groove body are communicated to jointly form a guide groove for the guide part to move, and the guide part is correspondingly inserted into the guide groove. The first receding hole is formed in the position, corresponding to the second groove body, of the PCB in a penetrating mode, the thickness space and the lower space of the PCB can be fully utilized, the length of the second groove body can be set to be larger, compared with the prior art, the overall length of the guide groove is increased, the guide part can be set to be larger in length, and the service life of the guide part is prolonged. Therefore, more parts of the guide part can be inserted into the guide groove, a more stable pipe position effect is provided by the guide groove, and the stability of guide and limiting effects is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic devices, and particularly relates to a key switch and a keyboard.

Background Art

[0002] A keyboard is a common input tool for electronic devices. A plurality of key switches are arranged on the keyboard, and pressing the key switches generates induction signals. The key switch generally includes a housing, a stroke component, and a signal component. The stroke component generates a linear reciprocating motion for triggering the signal component to generate an induction signal.

[0003] In order to prevent the movement direction of the stroke component from deviating, a guiding structure needs to be provided. In the related art, a guiding portion is arranged in the stroke component, and a guiding groove matching the guiding portion is arranged on the base. The guiding groove extends from the bottom plate of the base towards the direction close to the face cover. The length of the guiding groove is limited, so that the insertion length of the guiding portion in the guiding groove is short, and an effective clamping position cannot be formed for the guiding portion, and the limiting ability is poor.

[0004] Therefore, it is really necessary to provide a key switch and a keyboard to solve the problems raised in the above background art.

Content of the Utility Model

[0005] Aiming at the problem that the length of the guiding groove in the prior art is limited, so that the insertion length of the guiding portion in the guiding groove is short and an effective clamping position cannot be formed for the guiding portion, on the basis of the prior art that a first groove body is arranged on the base, a second groove body is added below the base. The first groove body and the second groove body are communicated to jointly form a guiding groove for the movement of the guiding portion. A first avoidance hole is penetrated through at a position corresponding to the second groove body on the PCB board. The thickness space of the PCB board and the space below can be fully utilized, so that the length of the second groove body can be set to a larger length, so that a larger part of the guiding portion can be inserted into the guiding groove, and a more stable tube positioning effect is provided by the guiding groove, ensuring the stability of the guiding and limiting functions.

[0006] To solve the above technical problems, the technical solution of the utility model lies in:

[0007] A key switch, comprising:

[0008] A housing, the housing includes a base and a face cover that are cooperatively enclosed to form a receiving space;

[0009] A stroke component partially received in the receiving space. The stroke component includes a guiding portion that can generate a linear stroke in a first direction. The base extends towards the face cover direction to form a first groove body, and the base extends away from the face cover direction to form a second groove body. The second groove body communicates with the first groove body and jointly forms a guiding groove for the movement of the guiding portion. The guiding groove provides limiting and guiding effects for the movement of the guiding portion.

[0010] A signal component that generates an induction signal under the drive of the stroke component. The signal component includes a PCB board. The PCB board is disposed on the side of the base facing away from the face cover. A first avoidance hole is penetrated through the position of the PCB board corresponding to the second groove body. The end of the second groove body away from the base is received in the first avoidance hole or exposed out of the first avoidance hole.

[0011] As an improvement, a convex block is disposed at the bottom of the second groove body corresponding to the end position of the stroke of the guiding portion. When the guiding portion moves to the end of the stroke, the guiding portion impacts the convex block to generate a key click sound.

[0012] As an improvement, the signal component further includes a trigger member and an induction member. The induction member is encapsulated on the PCB board, and the trigger member cooperates with the induction member to generate an induction signal.

[0013] As an improvement, a support portion is further disposed on the surface of the base close to the PCB board. A plurality of the support portions are disposed at the corner positions of the base for supporting the base on the PCB board, so that a gap is formed between the base and the PCB board at an interval.

[0014] As an improvement, the stroke component further includes a pressing portion, a driving portion connected to the pressing portion, and a limiting portion connected to the pressing portion and disposed around the driving portion. The limiting portion is limited by the face cover in the receiving space. The guiding portion is fixed to the limiting portion and generates a linear stroke under the drive of the pressing portion.

[0015] As an improvement, the extension length of the guiding portion in the first direction is greater than the extension length of the limiting portion in the first direction. At the end of the stroke of the guiding portion, the limiting portion contacts the base, and the guiding portion contacts the bottom of the second groove body.

[0016] As an improvement, the stroke component further includes a stroke column matching the driving portion and an elastic member for driving the stroke component to reset. The stroke column is provided with a stroke channel. The driving portion is correspondingly inserted into the stroke channel and can move along the stroke channel. The elastic member is sleeved on the periphery of the stroke column.

[0017] As an improvement, the key switch is a magnetic induction switch. The triggering member is mounted on the driving portion. The driving portion drives the triggering member to move towards the sensing member. When the distance between the triggering member and the sensing member reaches a preset threshold, an induction signal is triggered. The triggering member is a magnet, and the sensing member is a magnetic inductor; the elastic member is clamped between the driving portion and the base.

[0018] As an improvement, the key switch is a photoelectric switch. The triggering member is directly served by the driving portion. The sensing member is an infrared pair tube. The travel column includes an upper half cylinder and a lower half cylinder. The upper half cylinder is received in the receiving space, and the lower half cylinder passes through the receiving space and is exposed outside the base. The infrared pair tube includes a matching light emitting element and a light receiving element. A first light channel is penetrated through the side wall of the lower half cylinder corresponding to the position of the light emitting element, and a second light channel is penetrated through the side wall corresponding to the position of the light receiving element. The first light channel, the travel channel, and the second light channel are sequentially communicated to form an optical path channel. The infrared light emitted by the light emitting element is transmitted to the light receiving element through the optical path channel. The driving portion is used for cutting off and conducting the optical path; the elastic member is sleeved on the periphery of the upper half cylinder and is clamped between the pressing portion and the base; a second avoidance hole is penetrated through the PCB board corresponding to the position of the lower half cylinder, and one end of the lower half cylinder away from the base is received in the second avoidance hole or is exposed outside the second avoidance hole.

[0019] A keyboard includes a plurality of the above key switches.

[0020] The beneficial effects of the present utility model are as follows:

[0021] The base extends towards the face cover direction to form a first groove body, and the base extends towards the direction away from the face cover to form a second groove body. The second groove body is communicated with the first groove body and jointly forms a guiding groove for the guiding portion to move. The guiding portion is correspondingly inserted into the guiding groove. A first avoidance hole is penetrated through the PCB board corresponding to the position of the second groove body, which can make full use of the thickness space of the PCB board and the space below, so that the length of the second groove body can be set to a larger length. Compared with the prior art, the overall length of the guiding groove is increased, so that the guiding portion can be set to a larger length. Thus, more parts of the guiding portion can be inserted into the guiding groove, and a more stable tube positioning effect is provided by the guiding groove, ensuring the stability of the guiding and limiting functions.

Description of the Drawings

[0022] Figure 1 A three-dimensional structure diagram of the key switch provided in Embodiment 1;

[0023] Figure 2 Indicates Figure 1 A three-dimensional structure diagram of the push-button switch shown from another angle;

[0024] Figure 3 Indicates Figure 1 An exploded structure diagram of the push-button switch shown;

[0025] Figure 4 Indicates Figure 1 A cross-sectional view of the push-button switch shown along line A-A;

[0026] Figure 5 Indicates Figure 1 A cross-sectional view of the push-button switch shown along line B-B;

[0027] Figure 6 Indicates Figure 1 A reference diagram of the usage state of the push-button switch shown;

[0028] Figure 7 Indicates Figure 1 A reference diagram of the usage state of the push-button switch shown from another angle;

[0029] Figure 8 Indicates a schematic diagram of the mating structure between the base and the PCB board in Embodiment 1;

[0030] Figure 9 Indicates a schematic diagram of the structure of the base in Embodiment 1 from another angle;

[0031] Figure 10 Indicates a three-dimensional structure diagram of the push-button switch provided in Embodiment 2;

[0032] Figure 11 Indicates Figure 10 A three-dimensional structure diagram of the push-button switch shown from another angle;

[0033] Figure 12 Indicates Figure 10 An exploded structure diagram of the push-button switch shown;

[0034] Figure 13 Indicates Figure 10 A cross-sectional view of the push-button switch shown along line C-C;

[0035] Figure 14 Indicates Figure 10 A cross-sectional view of the push-button switch shown along line D-D;

[0036] Figure 15 Indicates Figure 10 A reference diagram of the usage state of the push-button switch shown;

[0037] Figure 16 Indicates Figure 10Reference diagram of the usage state of the key switch shown from another angle;

[0038] Figure 17 Schematic diagram showing the mating structure of the base and the PCB board in Embodiment 2;

[0039] Figure 18 Schematic diagram showing the structure of the base from another angle in Embodiment 2;

[0040] Figure 19 Schematic diagram showing the structure of the keyboard provided in Embodiment 3.

Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0042] Embodiment 1

[0043] Please refer to Figures 1 - 9 , this embodiment provides a photoelectric key switch 1, which includes a housing 10 having a receiving space, a travel component 20 partially received in the receiving space, and a signal component 30 for generating an induction signal.

[0044] The housing 10 includes a base 11 and a face cover 12 that cooperate to enclose the receiving space. The base 11 includes a bottom plate 111 and a first side plate 112 that extends bent from the edge of the bottom plate 111 towards the face cover 12; the face cover 12 includes a top plate 121 and a second side plate 122 that extends bent from the edge of the top plate 121 towards the base 11. The top plate 121 and the bottom plate 111 are parallel and spaced apart. The first side plate 112 and the second side plate 122 are fixed. The fixing method can be glue fixing, ultrasonic welding or snap fixing. In this embodiment, specifically, snap fixing is selected, that is, one of the first side plate 112 and the second side plate 122 is provided with a fastening portion, and the other is provided with a locking portion that matches it. The fastening portion and the locking portion cooperate to achieve the snap connection method, making the first side plate 112 and the second side plate 122 detachable for easy maintenance.

[0045] In other embodiments, the second side plate 122 may also be disposed around the first side plate 112 and closely attached to the first side plate 112. The second side plate 122 may partially overlap the first side plate 112 or completely cover the first side plate 112. In this setting mode, the splicing seam between the first side plate 112 and the second side plate 122 can be completely covered by the face cover 12, effectively achieving the effects of waterproofing and dustproofing.

[0046] The stroke assembly 20 includes a pressing part 21, a driving part 22 connected to the pressing part 21, a limiting part 23 connected to the pressing part 21 and located outside the driving part 22, a guiding part 24 connected to the limiting part 23, a stroke column 25 matching the driving part 22, and an elastic member 26 for driving the stroke assembly 20 to reset.

[0047] The pressing part 21 serves as a human-machine interaction part for the user to press to generate a driving force. A through hole 1210 is provided through the top plate 121 corresponding to the position of the pressing part 21, and the top of the pressing part 21 protrudes out of the through hole 1210.

[0048] The driving part 22 generates a linear stroke along the first direction X under the driving action of the pressing part 21, and is used to drive the signal assembly 30 to generate an induction signal. In this embodiment, the driving part 22 and the pressing part 21 are integrally formed.

[0049] The limiting part 23 is limited by the face cover 12 in the receiving space. Specifically, only the pressing part 21 can pass through the through hole 1210, and the limiting part 23 can never pass through the through hole 1210 and is limited by the top plate 121.

[0050] The guiding part 24 is driven by the limiting part 23 to move, and its movement state is consistent with that of the driving part 22, both generating a linear stroke in the first direction X. The base 11 extends towards the face cover 12 to form a first groove 1101, and the base 11 extends away from the face cover 12 to form a second groove 1102. The second groove 1102 communicates with the first groove 1101 to jointly form a guiding groove 110 for the guiding part 24 to move. The guiding groove 110 extends along the first direction X.

[0051] The guiding part 24 is correspondingly inserted into the guiding groove 110 and moves in the guiding groove 110. The guiding groove 110 provides a limiting and guiding effect on the movement of the guiding part 24, avoiding the deviation of the movement of the guiding part 24, and further avoiding the deviation of the movement of the driving part 22 resulting in button jamming.

[0052] In the prior art, the guiding groove 110 that provides guiding and limiting functions for the guiding portion 24 only includes the first groove body 1101 and does not include the second groove body 1102 in this embodiment. The setting of the second groove body 1102 increases the length of the guiding groove 110 compared with the prior art, so that the guiding portion 24 can be set to a greater length. Thus, more parts of the guiding portion 24 can be inserted into the guiding groove 110, and a more stable pipe positioning effect is provided by the guiding groove 110, ensuring the stability of the guiding and limiting functions.

[0053] Specifically, the extension length of the guiding portion 24 along the first direction X is greater than the extension length of the limiting portion 23 along the first direction X. At the end of the stroke of the stroke assembly 20, the limiting portion 23 contacts the bottom plate 111, and the guiding portion 24 contacts the bottom of the second groove body 1102.

[0054] Further, a convex block 1103 is provided at the position corresponding to the end of the stroke of the guiding portion 24 at the bottom of the second groove body 1102. When the guiding portion 24 moves to the end of the stroke, it impacts the convex block 1103 to generate a key clicking sound.

[0055] The stroke post 25 is fixed to the base 11, specifically fixed on the bottom plate 111. The stroke post 25 is provided with a stroke channel 250, and the driving portion 24 is correspondingly inserted into the stroke channel 250 and can move along the stroke channel 250. The stroke channel 250 serves as the stroke space of the driving portion 24, and the stroke channel 250 also extends linearly along the first direction X. By arranging the stroke post 25 around the driving portion 24, guiding and limiting functions are provided for the movement of the driving portion 24, so that the movement direction of the driving portion 24 is always the first direction X, avoiding deviation and causing key jamming.

[0056] The stroke post 25 includes an upper half cylinder 251 and a lower half cylinder 252. The upper half cylinder 251 is received in the receiving space, and the lower half cylinder 252 passes through the receiving space and is exposed outside the base 11. The upper half cylinder 251 and the lower half cylinder 252 cooperate to enclose the stroke channel 250.

[0057] The elastic member 26 is sleeved around the upper half cylinder 251 and is clamped between the pressing portion 21 and the bottom plate 111 for driving the stroke assembly 20 to reset. The elastic member 26 is a spring.

[0058] The signal component 30 includes a trigger, a sensor 32 and a PCB board 33. The trigger and the sensor 32 cooperate to generate a sensing signal. The sensor 32 is packaged on the PCB board 33. The PCB board 33 is arranged on a side of the base 11 away from the cover 12.

[0059] In this embodiment, the triggering member is directly acted by the driving unit 24 .

[0060] The sensing element 32 is an infrared pair tube, including a matching light emitting element 321 and a light emitting element 322 that cooperates with the light emitting element 321 to form a light path, and the light emitting element 321 and the light emitting element 322 are both packaged on the PCB board 33. A first light channel 2521 is provided through the side wall of the lower semi-cylinder 252 at a position corresponding to the light emitting element 321, and a second light channel 2512 is provided through the side wall of the lower semi-cylinder 252 at a position corresponding to the light emitting element 322. The first light channel 2521, the travel channel 250 and the second light channel 2512 are connected in sequence to form a light path channel, and the infrared light emitted by the light emitting element 321 is transmitted to the light emitting element 322 through the light path channel.

[0061] In the initial state, the driving part 24 is suspended above the optical path, and the light emitting element 321 cooperates with the light emitting element 322 to form an optical path; in the pressing state, the driving part 24 moves downward along the travel channel 250 driven by the pressing part 21 and enters the optical path, and the infrared light emitted by the light emitting element 321 is blocked by the driving part 24 and cannot be transmitted to the light emitting element 322. During the cutting of the optical path, the optical coupler is activated to change the circuit impedance value to complete the circuit cutting; in the resetting state, the pressing part 21 is driven by the elastic member 26 to reset upward, driving the driving part 24 to disengage from the optical path, and the infrared light emitted by the light emitting element 321 is received by the light emitting element 322 again. During the conduction of the optical path, the optical coupler is activated to change the circuit impedance value to complete the circuit conduction.

[0062] A first avoidance hole 331 is formed through the PCB board 33 at a position corresponding to the second slot 1102 , and one end of the second slot 1102 away from the base 11 is received in the first avoidance hole 331 or passes through the first avoidance hole 331 to be exposed.

[0063] The provision of the first avoidance hole 331 enables the second slot body 1120 to fully utilize the thickness space of the PCB board 33 and the space below the PCB board 33, thereby increasing the length of the guide slot 110 without increasing the overall height of the key switch 1.

[0064] Further, a support portion 1111 is also provided on a surface of the bottom plate 111 close to the PCB board 33. A plurality of the support portions 1111 are arranged at the corner positions of the bottom plate 111 for supporting the base 11 on the PCB board 33, so that a gap is formed between the base 11 and the PCB board 33. The setting of the gap can, on the one hand, prevent the base 11 from pressing the circuit elements on the PCB board 33, and on the other hand, enable the second groove body 1102 to obtain a greater length.

[0065] A second avoidance hole 332 is penetratingly provided in the PCB board 33 corresponding to the position of the lower half cylinder 252. One end of the lower half cylinder 252 away from the base 11 is received in the second avoidance hole 332 or exposed out of the second avoidance hole 332. The setting principle of the second avoidance hole 332 is the same as that of the first avoidance hole 331, both of which are to make full use of the thickness space of the PCB board 33 and the space below the PCB board 33.

[0066] In summary, the beneficial effects of the present utility model are as follows:

[0067] A first groove body 1101 is formed by the base 11 extending towards the direction close to the face cover 12, and a second groove body 1102 is formed by the base 11 extending towards the direction away from the face cover 12. The second groove body 1102 communicates with the first groove body 1101 to jointly form a guide groove 110 for the movement of the guide portion 24. The guide portion 24 is correspondingly inserted into the guide groove 110. The setting of the second groove body 1102 increases the length of the guide groove 110 compared with the prior art, so that the guide portion 24 can be set to a greater length. Thus, more parts of the guide portion 24 can be inserted into the guide groove 110, and a more stable tube positioning effect is provided by the guide groove 110 to ensure the stability of the guiding and limiting functions.

[0068] Embodiment 2

[0069] Please refer to Figures 10 - 18 , this embodiment provides a magnetic induction type key switch 1', which includes a housing 10' having a receiving space, a stroke assembly 20' partially received in the receiving space, and a signal assembly 30' for generating an induction signal.

[0070] The housing 10' includes a base 11' and a face cover 12' that are cooperatively enclosed to form the receiving space, and the base 11' and the face cover 12' are detachably connected.

[0071] The stroke assembly 20' includes a pressing part 21', a driving part 22' connected to the pressing part, a limiting part 23' connected to the pressing part and located outside the driving part 22', a guiding part 24' connected to the limiting part 23', a stroke column 25' matching the driving part 22', and an elastic part 26' for driving the stroke assembly 20' to reset.

[0072] The pressing part 21' serves as a human-computer interaction part for the user to press to generate a driving force. The driving part 22' generates a linear stroke in the first direction X under the driving action of the pressing part 21' to drive the signal assembly 30' to generate a signal.

[0073] In this embodiment, the driving part 22' is separately arranged from the pressing part 21', and the contact surface between the driving part 22' and the pressing part 21' is an arc surface. That is, an arc-shaped convex structure is provided on one of the pressing part 21' and the driving part 22', and an arc-shaped concave structure is provided on the other. The convex structure is correspondingly installed in the concave structure to play the role of a spherical joint of a wrist joint. When the pressing part 21' swings horizontally or tilts under the pressing force, the pressing part 21' can rotate relative to the driving part 22'. The horizontal displacement component generated by the rotation can exactly offset the horizontal component generated by the horizontal swing or tilt of the pressing part 21', so that the pressing part 21' does not generate a driving force in the horizontal direction on the driving part 22'. In this way, the driving part 22' can maintain a vertical movement without tilting, avoiding the friction between the driving part 22' and the stroke column 25' to form a jamming feeling and improving the use experience.

[0074] The limiting part 23' is limited in the receiving space by the face cover 12'.

[0075] The guiding part 24' is driven by the limiting part 23' to move, and its movement state is consistent with that of the driving part 22', both generating a linear stroke in the first direction X. The base 11' extends towards the face cover 12' to form a first groove body 1101', and the base 11' extends away from the face cover 12' to form a second groove body 1102'. The second groove body 1102' is communicated with the first groove body 1101' to jointly form a guiding groove 110' for the guiding part 24' to move. The guiding groove 110' extends along the first direction X.

[0076] The guiding part 24' is correspondingly inserted into the guiding groove 110' and moves within the guiding groove 110'. The setting of the second groove body 1102' increases the length of the guiding groove 110', enabling the guiding part 24' to be set to a greater length. As a result, a greater portion of the guiding part 24' can be inserted into the guiding groove 110', and the guiding groove 110' provides a more stable tube positioning effect, ensuring the stability of the guiding and limiting functions.

[0077] The travel column 25' is fixed to the base 11'. The travel column 25' is provided with a travel channel 250'. The driving part 24' is correspondingly inserted into the travel channel 250' and can move along the travel channel 250'. The travel channel 250' serves as the travel space for the driving part 24', and the travel channel 250' also extends linearly along the first direction X.

[0078] The elastic member 26' is sleeved around the periphery of the travel column 25' and is clamped between the driving part 22' and the base 11' for driving the travel assembly 20' to reset.

[0079] The signal assembly 30' includes a trigger member 31', a sensing member 32' and a PCB board 33'. The trigger member 31' and the sensing member 32' cooperate to generate a sensing signal. The sensing member 32' is encapsulated on the PCB board 33', and the PCB board 33' is disposed on a side of the base 11' away from the face cover 12'.

[0080] In this embodiment, the trigger member 31' is a magnet, the sensing member 32' is a magnetic inductor. The trigger member 31' is installed on the driving part 22'. When the driving part 22' drives the trigger member 31' to move towards the sensing member 32', when the distance between the trigger member 31' and the sensing member 32' reaches a preset threshold, a sensing signal is triggered.

[0081] Preferably, the driving part 22' is a hollow structure with an open bottom. The trigger member 31' is fixed within the hollow area of the driving part 22', and the fixing method is selected as glue fixing. During installation, the trigger member 31' is loaded from the bottom opening of the driving part 22'.

[0082] Embodiment 3

[0083] Please refer to Figure 19 , this embodiment provides a keyboard 100, including a plurality of key switches 200. The key switches 200 are selected from any one or a combination of two of the key switch 1 in Embodiment 1 and the key switch 1' in Embodiment 2.

[0084] The keyboard 100 is used in conjunction with an electronic device as an input tool for the electronic device. When in use, the key switch 200 is pressed to generate an induction signal corresponding to the key switch 200.

[0085] The above are only the embodiments of the present invention. It should be noted here that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, improvements can still be made, but these all fall within the protection scope of the present invention.

Claims

1. A push-button switch, characterized in that, Comprising: A housing, the housing including a base and a face cover that cooperate to enclose a receiving space; A stroke assembly partially received in the receiving space, the stroke assembly including a guiding portion that can generate a linear stroke in a first direction, the base extending towards the face cover to form a first groove, the base extending away from the face cover to form a second groove, the second groove communicating with the first groove to jointly form a guiding groove for the movement of the guiding portion, the guiding groove providing a limiting and guiding effect for the movement of the guiding portion; A signal assembly that generates an induction signal under the drive of the stroke assembly, the signal assembly including a PCB board, the PCB board being disposed on a side of the base facing away from the face cover, a first avoidance hole being formed through the PCB board corresponding to the position of the second groove, and one end of the second groove away from the base being received in the first avoidance hole or protruding out of the first avoidance hole.

2. The push-button switch according to claim 1, characterized in that, A convex block is disposed at the bottom of the second groove corresponding to the end of the stroke of the guiding portion. When the guiding portion moves to the end of the stroke, the guiding portion impacts the convex block to generate a key click sound.

3. The push-button switch according to claim 1, wherein The signal assembly further includes a triggering member and a sensing member, the sensing member being encapsulated on the PCB board, and the triggering member cooperating with the sensing member to generate an induction signal.

4. The push-button switch according to claim 1, characterized in that, A supporting portion is further disposed on a surface of the base close to the PCB board, and a plurality of the supporting portions are disposed at the corner positions of the base for supporting the base on the PCB board to form a gap between the base and the PCB board.

5. The push-button switch according to claim 3, characterized in that, The stroke assembly further includes a pressing portion, a driving portion connected to the pressing portion, and a limiting portion connected to the pressing portion and disposed around the driving portion. The limiting portion is limited in the receiving space by the face cover, and the guiding portion is fixed to the limiting portion and generates a linear stroke under the drive of the pressing portion.

6. The push-button switch according to claim 5, wherein The extending length of the guiding portion in the first direction is greater than the extending length of the limiting portion in the first direction. At the end of the stroke of the guiding portion, the limiting portion contacts the base, and the guiding portion contacts the bottom of the second groove.

7. The push-button switch according to claim 5, characterized in that, The stroke assembly further includes a stroke post matching the driving portion and an elastic member for driving the stroke assembly to reset. The stroke post is provided with a stroke channel, the driving portion is correspondingly inserted into the stroke channel and can move along the stroke channel, and the elastic member is sleeved around the periphery of the stroke post.

8. The push-button switch according to claim 7, wherein, The key switch is a magnetic induction switch, the triggering member is mounted on the driving portion, the driving portion drives the triggering member to move towards the sensing member, and when the distance between the triggering member and the sensing member reaches a preset threshold, an induction signal is triggered. The triggering member is a magnet, and the sensing member is a magnetic inductor; the elastic member is clamped between the driving portion and the base.

9. The push-button switch according to claim 7, wherein The key switch is a photoelectric switch. The triggering member is directly served by the driving portion. The sensing member is an infrared pair tube. The stroke post includes an upper half cylinder and a lower half cylinder. The upper half cylinder is received in the receiving space, and the lower half cylinder passes through the receiving space and is exposed outside the base. The infrared pair tube includes a matching light emitting element and a light receiving element. A first light channel is provided through the side wall of the lower half cylinder corresponding to the position of the light emitting element, and a second light channel is provided through the side wall corresponding to the position of the light receiving element. The first light channel, the stroke channel and the second light channel are sequentially communicated to form an optical path channel. The infrared light emitted by the light emitting element is transmitted to the light receiving element through the optical path channel. The driving portion is used to cut off and conduct the optical path. The elastic member is sleeved around the upper half cylinder and clamped between the pressing portion and the base. A second avoidance hole is provided through the PCB board corresponding to the position of the lower half cylinder. One end of the lower half cylinder away from the base is received in the second avoidance hole or exposed through the second avoidance hole.

10. A keyboard, characterized in that, Comprising a plurality of key switches according to any one of claims 1-9.

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