CN211957496U

CN211957496U - Piano key switch

Info

Publication number: CN211957496U
Application number: CN201921568923.1U
Authority: CN
Inventors: 何栋
Original assignee: Zhongshan Auckland Electrical Appliance Co ltd
Current assignee: Zhongshan Auckland Electrical Appliance Co ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-11-17
Anticipated expiration: 2029-09-20

Abstract

The utility model relates to a key switch, which comprises a base and a cover body which are connected with each other, wherein a cavity is formed between the base and the cover body; a pinch plate, a locking plate, a first movable contact piece, a first static contact piece and a second static contact piece are arranged in the cavity; the first end of the first movable contact piece, the first static contact piece and the second static contact piece are fixedly connected with the base, and the first end of the first movable contact piece, the first static contact piece and the second static contact piece are arranged separately; the cover body is provided with a first switch key rod which movably penetrates through the cover body; the base is also provided with a common end connecting hole and a first connecting hole which are communicated with the cavity; the first static contact is connected with a first contact pin, the second static contact is connected with a second contact pin, and the first contact pin and the second contact pin extend out of the common terminal hole; the first end of the first movable contact piece is connected with a third contact pin, the second static contact piece is connected with a fourth contact pin, and the third contact pin and the fourth contact pin extend out of the first connecting hole. The utility model discloses can save the wiring process of key switch.

Description

Piano key switch

Technical Field

The utility model relates to the technical field of switches, concretely relates to key switch.

Background

The key switch is often used for gear setting and other purposes, and is widely applied to household appliances such as fans, range hoods and the like. At present, key switch on the market mostly needs the manual work to be connected to the inside movable contact spring or the static contact of key switch with the electric wire on, and the wiring is inconvenient, and the process of working a telephone switchboard is complicated, consumes a large amount of time and manpower, and causes key switch's damage during the wiring easily.

SUMMERY OF THE UTILITY MODEL

The key switch is not enough to prior art, the utility model aims at providing a key switch of easily working a telephone switchboard.

In order to realize the purpose of the utility model, the utility model provides a key switch, which comprises a base and a cover body which are connected with each other, and a cavity is formed between the base and the cover body; a pinch plate, a locking plate, a first movable contact piece, a first static contact piece and a second static contact piece are arranged in the cavity; the pinch plate can move along the length direction of the cavity, one end of the pinch plate is connected with the base through a first elastic piece, and a clamping groove is formed in the pinch plate; the locking plate, the first end of the first movable contact piece, the first static contact piece and the second static contact piece are fixedly connected with the base, the locking plate is adjacent to the pinch plate, and the first end of the first movable contact piece, the first static contact piece and the second static contact piece are arranged separately; the cover body is provided with a first switch key rod, the first switch key rod movably penetrates through the cover body, the first end of the first switch key rod extends into the cavity, the first end of the first switch key rod is provided with a clamping block and a first pressing block, when the first end of the first switch key rod moves towards the bottom of the cavity, the first pressing block presses the second end of the first movable contact piece, the second end of the first movable contact piece gradually approaches to the first static contact piece until the first movable contact piece contacts the first static contact piece, and the clamping block pushes the buckling plate to move along the length direction of the cavity until the buckling plate slides into the clamping groove; the base is also provided with a common end connecting hole and a first connecting hole which are communicated with the cavity; the first static contact is connected with a first contact pin, the second static contact is connected with a second contact pin, and the first contact pin and the second contact pin extend out of the common terminal hole; the first end of the first movable contact piece is connected with a third contact pin, the second static contact piece is connected with a fourth contact pin, and the third contact pin and the fourth contact pin extend out of the first connecting hole.

The second end of the first switch key rod is positioned outside the cover body, and the second end of the first switch key rod is abutted to the cover body through the second elastic piece.

The further technical scheme is that a reset key rod is arranged on the cover body, the reset key rod movably penetrates through the cover body, the first end of the reset key rod stretches into the cavity, the first end of the reset key rod is provided with a protruding portion, an inclined groove is formed in the buckle plate, when the first end of the reset key rod moves towards the bottom of the cavity, the protruding portion is in contact with the inclined groove to push the buckle plate to move along the length direction of the cavity, and the clamping block is separated from the clamping groove.

The further technical scheme is that the second end of the reset key rod is positioned outside the cover body, and the second end of the reset key rod is abutted against the cover body through a third elastic piece.

The further technical scheme is that the clamping groove and the inclined groove are sequentially arranged on the buckle plate along the length direction of the cavity, the inclined groove is arranged at the edge of the buckle plate, the clamping groove extends along the length direction of the cavity, the buckle plate further comprises an inclined edge which is connected with the clamping groove and the buckle plate edge, and the inclined edge is the same as the inclined direction of the inclined groove.

The further technical proposal is that a second movable contact spring is arranged in the cavity, and the first end of the second movable contact spring is fixedly connected with the base; the cover body is provided with a second switch key rod which movably penetrates through the cover body, the first end of the second switch key rod extends into the cavity, the first end of the second switch key rod is provided with a second pressing block, when the first end of the second switch key rod moves towards the bottom of the cavity, the second pressing block presses the second end of the second movable contact piece, and the second end of the second movable contact piece is gradually close to and contacted with the first static contact piece; the base is also provided with a second connecting hole communicated with the cavity, the first end of the second movable contact piece is connected with a fifth contact pin, the second static contact piece is connected with a sixth contact pin, and the fifth contact pin and the sixth contact pin extend out of the second connecting hole.

The second switch key rod is connected with the cover body through a second elastic piece.

The first end of the second switch key rod is also provided with a limiting groove, and the limiting groove is provided with a first groove and a second groove in the extending direction of the second switch key rod; the lid is connected with the locking piece, and the first end of locking piece is connected with the lid, and the setting of locking piece second end is just removed and is removed between first recess and second recess along with second switch key pole at the spacing inslot.

The further technical scheme is that the number of the first switch key rods is one, two, three, four or more than five, and when the number of the first switch key rods is multiple, the multiple first switch key rods are sequentially arranged along the length direction of the cavity; the number of the first movable contact pieces, the clamping grooves and the third contact pins is the same as that of the first switch key rods and is arranged corresponding to the first switch key rods.

The base comprises a first extending block extending outwards from one side of the common termination hole and a second extending block extending outwards from one side of the first connection hole, wherein a first clamping block is arranged at the tail end of the first extending block, and a second clamping block is arranged at the tail end of the second extending block; a first socket is connected to the outer side of the common end connecting hole, the first contact pin and the second contact pin are inserted into the first socket jack, and the first clamping block is matched with the first socket; the first hole outside that connects is connected with the second socket, and in third contact pin and the fourth contact pin inserted the second socket jack, the second fixture block cooperated with the second socket.

The base comprises a third extending block extending outwards from one side of the second connecting hole, and a third clamping block is arranged at the tail end of the third extending block; the second connects the hole outside and is connected with the third socket, and in fifth contact pin and the sixth contact pin inserted the third socket jack, the third fixture block cooperated with the third socket.

The further technical scheme is that the second end of the first switch key rod, the second end of the reset key rod and the second end of the second switch key rod are connected with keycaps.

The technical scheme is that the first contact pin, the second contact pin, the third contact pin, the fourth contact pin, the fifth contact pin and the sixth contact pin are respectively straight pins or u-shaped pins; the first contact pin is directly connected with the first static contact or connected with the first static contact through the first conducting strip, the second contact pin is directly connected with the second static contact or connected with the second static contact through the second conducting strip, the third contact pin is directly connected with the first end of the first movable contact or connected with the first movable contact through the third conducting strip, the fourth contact pin is directly connected with the second static contact or connected with the second static contact through the fourth conducting strip, the fifth contact pin is directly connected with the first end of the second movable contact or connected with the first end of the second movable contact through the fifth conducting strip, and the sixth contact pin is directly connected with the second static contact or connected with the second static contact through the sixth conducting strip.

The base comprises a stop block, a first end of a first movable contact piece is fixed on the first side of the stop block, the first movable contact piece is bent, a second end of the first movable contact piece is located on the outer side of the second side of the stop block, and a first static contact piece is fixed on the second side of the stop block.

The further technical proposal is that the base is clamped with the cover body.

Compared with the prior art, the utility model discloses can gain following beneficial effect:

the utility model discloses a key switch leads to the outside of key switch through the contact pin with the wiring position of the inside static contact of key switch and movable contact, has solved the inconvenient problem of current key switch wiring, can save the wiring process, uses manpower sparingly, reduction in production cost.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of a piano key switch without a socket according to the present invention.

Fig. 2 is a schematic structural diagram of an embodiment of the key switch of the present invention without a socket, a cover plate, a second elastic member, a third elastic member, and a key cap.

Fig. 3 is an exploded schematic view of the embodiment of the keyswitch of the present invention without a socket.

Fig. 4 is an exploded view of the embodiment of the piano key switch without the socket at another angle.

Fig. 5 is a schematic perspective view of the key switch of the present invention with a socket.

Detailed Description

The utility model discloses a key switch is suitable for the switch of being used as domestic appliance etc. especially is suitable for the switch as smoke ventilator.

As shown in fig. 1 to 5, the key switch of the present embodiment includes a base 100 and a cover 200 that are snappingly connected to each other, with an elongated cavity 110 formed between the base 100 and the cover 200. The cover 200 is provided with a first switch key rod 210, a reset key rod 220 and a second switch key rod 230, the first switch key rod 210, the reset key rod 220 and the second switch key rod 230 respectively and movably penetrate through the cover 200, that is, the first switch key rod 210, the reset key rod 220 and the second switch key rod 230 respectively penetrate through a hole in the cover 200 and can move in the hole along a direction from the cover 200 to the bottom of the cavity 110 or from the bottom of the cavity 110 to the cover 200, and the bottom of the cavity 110 refers to a part of the cavity 110 opposite to the cover 200 and far away from the cover 200.

In the present embodiment, the number of the first switch key levers 210 is three, and the reset key lever 220, three first switch key levers 210 and the second switch key lever 230 are sequentially arranged along the length direction of the cavity 110. The first switch lever 210 may be connected to a motor of a suction fan of the range hood to control rotation of the motor. Specifically, in the present embodiment, the three first switch levers 210 can be respectively used for controlling the low-gear, middle-gear and high-gear rotation speeds of the exhaust fan of the range hood. In other embodiments of the present invention, the number of the first switch levers 210 may be one, two, four or more than five, and different gears may be set. The reset key lever 220 is used for resetting the first switching key lever 210. The second switch key lever 230 is independent of the first switch key lever 210 and the reset key lever 220, has no linkage relation with the first switch key lever 210 and the reset key lever 220, can be connected with an illuminating lamp in the range hood, and can independently control the on-off of the illuminating lamp.

The first end of the first switch key rod 210 extends into the cavity 110, and the first end of the first switch key rod 210 is provided with a clamping block 211 and a first pressing block 212. The second end of the first switch key lever 210 is located outside the cover 200, the second end of the first switch key lever 210 abuts against the cover 200 through the second elastic member 213, the second elastic member 213 is used for resetting the first switch key lever 210, and in this embodiment, the second elastic member 213 is a tower spring.

The first end of the reset key rod 220 extends into the cavity 110, the first end of the reset key rod 220 is provided with a protruding portion 221, the second end of the reset key rod 220 is located outside the cover 200, the second end of the reset key rod 220 abuts against the cover 200 through a third elastic member 222, the third elastic member 222 is used for resetting the reset key rod 220, and in this embodiment, the third elastic member 222 is a tower spring.

The first end of the second switch key rod 230 extends into the cavity 110 and the first end of the second switch key rod 230 is provided with a second pressing block 231. The second end of the second switch key lever 230 is located outside the cover 200, the second end of the second switch key lever 230 abuts against the cover 200 through a fourth elastic member 232, and the fourth elastic member 232 is used for resetting the second switch key lever 230. In this embodiment, the fourth elastic member 232 is a tower spring. The first end of the second switch key lever 230 is further provided with a limiting groove 233, the limiting groove 233 is provided with a first groove 234 and a second groove 235 in the extending direction of the second switch key lever 230, the limiting groove 233 further comprises two communicating grooves respectively communicating the two ends of the first groove 234 and the two ends of the second groove 235, and the limiting groove 233 forms a groove similar to a ring. The cover 200 is connected with a locking member 236, in this embodiment, the locking member 236 is rotatably connected to the boss 201 of the cover 200, the locking member 236 includes a bar-shaped body, and a first end of the locking member 236 and a second end of the locking member 236 at two ends of the bar-shaped body are bent relative to the bar-shaped body. A first end of the lock member 236 is connected to the cover 200, and a second end of the lock member 236 is disposed in the limiting groove 233 and moves between the first groove 234 and the second groove 235 along the two communicating grooves as the second switch key lever 230 moves, so as to be able to be clamped in the first groove 234 or the second groove 235, thereby realizing the press-down locking and the pop-up locking of the second switch key lever 230.

A key cap 240 is coupled to the second end of the first switch keybar 210, the second end of the reset keybar 220, and the second end of the second switch keybar 230.

A first movable contact piece 310, a second movable contact piece 320, a first stationary contact piece 330 and a second stationary contact piece 340 are provided in the cavity 110. The first end of the first movable contact piece 310, the first end of the second movable contact piece 320, the first fixed contact piece 330 and the second fixed contact piece 340 are fixedly connected with the base 100, and the first end of the first movable contact piece 310, the first end of the second movable contact piece 320, the first fixed contact piece 330 and the second fixed contact piece 340 are arranged separately from each other. In this embodiment, the number of the first movable contact pieces 310 is the same as that of the first switch key lever 210, and is three, and the first movable contact pieces 310 are disposed corresponding to the first switch key lever 210; the number of the second movable contact pieces 320 is the same as that of the second switch key bar 230, and is one, and the second movable contact pieces 320 are arranged corresponding to the second switch key bar 230. In this embodiment, the bottom of the cavity 110 is provided with a stopper 111, a first end of the first movable contact piece 310 and a first end of the second movable contact piece 320 are fixed on a first side of the stopper 111, the first movable contact piece 310 is bent and a second end of the first movable contact piece 310 is located on an outer side of a second side of the stopper 111, the second movable contact piece 320 is bent and a second end of the second movable contact piece 320 is located on an outer side of the second side of the stopper 111, the first fixed contact piece 3301 is fixed on the second side of the stopper 111, and the second fixed contact piece 340 is fixed on an inner wall of the base on the outer side of the first side of the stopper 111, which is not in contact with the first end of.

The buckle plate 120 and the locking plate 121 are arranged in the cavity 110, the buckle plate 120 is adjacent to the locking plate 121, the locking plate 121 is fixed on the inner wall of the cavity 110, the inner wall extends along the length direction of the cavity 110, the buckle plate 120 can move along the length direction of the cavity 110, and the first end of the buckle plate 120 is connected with the inner side wall of the base 100 through the first elastic piece 122. In this embodiment, the bottom of the cavity 110 is provided with a plurality of guide blocks 112, the guide blocks 112 are used for further limiting the moving direction of the first switch key rod 210, the reset key rod 220 and the second switch key rod 230, and the moving direction of the pinch plate 120 is defined between the guide blocks 112 and the lock plate 121; the first end of the pinch plate 120 is connected with the inner side wall of the base 100 at a position close to the reset key rod 220; a stop block 101 is arranged on the base 100 and used for limiting the stroke of the second end of the pinch plate 120; the first elastic member 122 is a hook spring for restoring the buckle 120. The buckle plate 120 is provided with a clamping groove 123 and an inclined groove 124, the clamping groove 123 extends along the length direction of the cavity 110, the buckle plate 120 further comprises an inclined edge 125 connecting the clamping groove 123 and the buckle plate 120 edge, the inclined groove 124 is arranged at the buckle plate 120 edge, and the inclined directions of the inclined groove 124 and the inclined edge 125 are the same. The number of the card slots 123 is the same as that of the first switch lever 210, and the card slots 123 are disposed corresponding to the first switch lever 210. The inclined groove 124 is provided corresponding to the reset key lever 220. The catching groove 123 and the inclined groove 124 are sequentially provided on the catching plate 120 in a length direction of the cavity 110.

When the first end of the first switch key rod 210 moves towards the bottom of the cavity 110, that is, the first switch key rod 210 is pressed downwards, the first pressing piece 212 presses the second end of the first movable contact piece 310, the second end of the first movable contact piece 310 gradually approaches to the first static contact piece 330 until contacting, and the latch 211 contacts with the inclined edge 125 so as to push the buckle plate 120 to move along the length direction of the cavity 110 until the latch 211 slides into the latch groove 123, so that the first switch key rod 210 is pressed downwards and locked. Meanwhile, the locking piece 121 plays a role of interlocking, preventing the plurality of first switch levers 210 from being simultaneously communicated. When the other first key lever 210 is pressed down, the other first key lever 210 pushes the catching plate 120 to move in the length direction of the cavity 110, the catching block 211 of the previously pressed first key lever 210 is disengaged from the catching groove 123, and bounces outward of the cover body 200 to return to the original position under the action of the second elastic member 213.

When the first end of the reset key rod 220 moves to the bottom of the cavity 110, that is, the reset key rod 220 is pressed down, the protrusion 221 contacts the inclined groove 124 to push the latch 120 to move along the length direction of the cavity 110, the latch 211 of the first switch key rod 210 which has been pressed down is separated from the latch groove 123, and springs up to the outside of the cover body 200 to return to the original position under the action of the second elastic member 213.

When the first end of the second switch key lever 230 moves toward the bottom of the cavity 110, that is, the second switch key lever 230 is pressed down, the second pressing piece 231 presses the second end of the second movable contact piece 320, and the second end of the second movable contact piece 320 comes closer to and contacts the first stationary contact piece 330.

The base 100 is further provided with a common terminal connection hole 102, a first connection hole 103 and a second connection hole 104 which communicate with the cavity 110. The common terminal hole 102, the first connection hole 103 and the second connection hole 104 may include a plurality of holes, respectively, one hole accommodating one pin. The first contact plate 330 is connected with a first pin 331, the second contact plate 340 is connected with a second pin 341, the first pin 331 and the second pin 341 are close to each other and extend from the common terminal hole 102, and the first pin 331 and the second pin 341 can be connected with an L pole and an N pole of the power line, respectively. The first end of the first movable contact 310 is connected with a third pin 311, the second fixed contact 340 is connected with a fourth pin 342, the third pin 311 and the fourth pin 342 are close to each other and extend out from the first connection hole 103, the number of the third pins 311 is the same as that of the first switch lever 210, and the number of the fourth pins 341 may be one. Each of the third pin 311 and the fourth pin 342 may be a straight pin, or a u-shaped pin, which is also called a skip pin, and a bent structure of the u-shaped pin may enable the plurality of third pins 311 and the fourth pin 342 to approach each other, or the straight pins may be connected to the corresponding first movable contact 310 and the second stationary contact 340 through copper sheets, so that the plurality of third pins 311 and the fourth pin 342 approach each other. Specifically, in the present embodiment, as shown in fig. 3, in order to make the plurality of third pins 311 approach each other, a u-shaped pin is used as one of the third pins 311. In other embodiments of the present invention, the third contact pin 311 may be a straight pin, the bottom of which extends out of the base 100 and the top of which is connected to the first end of the first movable contact piece 310 through a conductive piece, such as a copper piece, and the conductive piece serves as a bridge, so that the same effect can be achieved. The third pin 311 and the fourth pin 342 may be used to connect with a motor of a suction fan of a range hood. The first end of the second movable contact piece 320 is connected with a fifth pin 321, the second fixed contact piece 340 is connected with a sixth pin 343, the fifth pin 321 and the sixth pin 343 are close to each other and extend out from the second connection hole 104, the fifth pin 321 and the sixth pin 343 may adopt a straight pin or a u-shaped pin, the u-shaped pin is also called a skip pin, the fifth pin 321 and the sixth pin 343 are close to each other by adopting a bending structure of the u-shaped pin, or the straight pin is connected with the corresponding second movable contact piece 320 and the second fixed contact piece 340 through copper sheets. The fifth pin 321 and the sixth pin 343 may be used to connect with a lighting lamp of the range hood. The contact pin and the static contact piece or the movable contact piece can be directly connected, or can be connected through a conductive piece such as a copper sheet.

The base 100 further comprises a first extending block 105 extending outwards at one side of the common end connection hole 102, a second extending block 106 extending outwards at one side of the first connection hole 103, and a third extending block 107 extending outwards at one side of the second connection hole 104, wherein the first extending block 105, the second extending block 106 and the third extending block 107 are respectively provided with a first latch 108, a second latch and a third latch at the ends thereof. The first extension block 105, the second extension block 106 and the third extension block 107 can be respectively used for being matched with the first socket 130, the second socket 140 and the third socket 150, and specifically, the first socket 130, the second socket 140 and the third socket 150 are respectively provided with a buckle which is connected with the first latch 108, the second latch and the third latch. In this embodiment, the first, second and

third sockets

130, 140, 150 may be existing sockets, preferably VH sockets. The first pin 331 and the second pin 341 are inserted into the first socket 130, the plurality of third pins 311 and fourth pins 342 are inserted into the second socket 140, and the fifth pin 321 and sixth pin 343 are inserted into the third socket 150. In the embodiment, the first pin 331, the second pin 341, the third pin 311, the fourth pin 342, the fifth pin 321 and the sixth pin 343 are used for leading the wiring points of the first movable contact piece 310, the second movable contact piece 320, the first static contact piece 330 and the second static contact piece 340 in the key switch to the outside of the key switch, so that the problem of inconvenience in wiring of the existing key switch is solved, the wiring process can be saved, the labor is saved, and the production cost is reduced.

In other embodiments of the present invention, for example, the key switch for the electric fan, which does not need to have the illumination function, may not have the second switch key lever 230, the second movable contact 320, the fifth contact pin 321, the sixth contact pin 343, and the third socket 150, and the key switch for the electric fan may be wired through the first socket 130 and the second socket 140.

The utility model discloses an in other embodiments, each socket can not be connected to the key switch, and each contact pin outwards extends, and the user can select socket and contact pin cooperation according to actual need.

Finally, it should be emphasized that the above-described embodiments are merely preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A key switch comprises a base and a cover which are connected with each other, wherein a cavity is formed between the base and the cover; a pinch plate, a locking plate, a first movable contact piece, a first static contact piece and a second static contact piece are arranged in the cavity; the buckle plate can move along the length direction of the cavity, one end of the buckle plate is connected with the base through a first elastic piece, and a clamping groove is formed in the buckle plate; the locking plate, the first end of the first movable contact piece, the first static contact piece and the second static contact piece are fixedly connected with the base, the locking plate is adjacent to the pinch plate, and the first end of the first movable contact piece, the first static contact piece and the second static contact piece are arranged separately; the cover body is provided with a first switch key rod, the first switch key rod movably penetrates through the cover body, the first end of the first switch key rod extends into the cavity, a clamping block and a first pressing block are arranged at the first end of the first switch key rod, when the first end of the first switch key rod moves towards the bottom of the cavity, the first pressing block presses the second end of the first movable contact piece, the second end of the first movable contact piece and the first static contact piece are gradually close to each other until contacting, and the clamping block pushes the buckling plate to move along the length direction of the cavity until the buckling plate slides into the clamping groove; the method is characterized in that:

the base is also provided with a common end connecting hole and a first connecting hole which are communicated with the cavity; the first static contact is connected with a first contact pin, the second static contact is connected with a second contact pin, and the first contact pin and the second contact pin extend out of the common terminal hole; the first end of the first movable contact piece is connected with a third contact pin, the second fixed contact piece is connected with a fourth contact pin, and the third contact pin and the fourth contact pin extend out of the first connecting hole.

2. A key switch according to claim 1, wherein:

the second end of the first switch key rod is positioned outside the cover body, and the second end of the first switch key rod is abutted against the cover body through a second elastic piece;

the cover body is provided with a reset key rod, the reset key rod movably penetrates through the cover body, the first end of the reset key rod extends into the cavity, the first end of the reset key rod is provided with a protruding part, the pinch plate is provided with an inclined groove, when the first end of the reset key rod moves towards the bottom of the cavity, the protruding part is in contact with the inclined groove so as to push the pinch plate to move along the length direction of the cavity, and the clamping block is separated from the clamping groove;

the second end of the reset key rod is located on the outer side of the cover body, and the second end of the reset key rod is abutted to the cover body through a third elastic piece.

3. A key switch according to claim 2, wherein:

the draw-in groove with the inclined groove is followed the length direction of cavity sets gradually on the buckle, the inclined groove sets up the buckle edge, the draw-in groove is followed the length direction of cavity extends, the buckle is still including connecting the draw-in groove with the slope limit at buckle edge, the slope limit with the incline direction of inclined groove is the same.

4. A key switch according to claim 2, wherein:

a second movable contact spring is also arranged in the cavity, and the first end of the second movable contact spring is fixedly connected with the base;

a second switch key rod is arranged on the cover body and movably penetrates through the cover body, the first end of the second switch key rod extends into the cavity, a second pressing block is arranged at the first end of the second switch key rod, when the first end of the second switch key rod moves towards the bottom of the cavity, the second pressing block presses the second end of the second movable contact piece, and the second end of the second movable contact piece is gradually close to and in contact with the first static contact piece;

the second end of the second switch key rod is positioned outside the cover body, and the second end of the second switch key rod is abutted against the cover body through a fourth elastic piece;

the base is further provided with a second connecting hole communicated with the cavity, the first end of the second movable contact piece is connected with a fifth contact pin, the second fixed contact piece is connected with a sixth contact pin, and the fifth contact pin and the sixth contact pin extend out of the second connecting hole.

5. A key switch according to claim 4, wherein:

the first end of the second switch key rod is also provided with a limiting groove, and the limiting groove is provided with a first groove and a second groove in the extending direction of the second switch key rod; the cover body is connected with a locking piece, a first end of the locking piece is connected with the cover body, and a second end of the locking piece is arranged in the limiting groove and moves between the first groove and the second groove along with the movement of the second switch key rod.

6. A key switch according to any one of claims 1 to 3, wherein:

the number of the first switch key rods is one, two, three, four or more than five, and when the number of the first switch key rods is multiple, the multiple first switch key rods are sequentially arranged along the length direction of the cavity;

the number of the first movable contact pieces, the clamping grooves and the third contact pins is the same as that of the first switch key rods and is arranged corresponding to the first switch key rods.

7. A key switch according to any one of claims 1 to 3, wherein:

the base comprises a first extending block extending outwards from one side of the common termination hole and a second extending block extending outwards from one side of the first connection hole, a first clamping block is arranged at the tail end of the first extending block, and a second clamping block is arranged at the tail end of the second extending block;

a first socket is connected to the outer side of the common end connecting hole, the first contact pin and the second contact pin are inserted into the first socket jack, and the first clamping block is matched with the first socket; the first hole is connected with a second socket on the outer side, the third pin and the fourth pin are inserted into the second socket jack, and the second fixture block is matched with the second socket.

8. A key switch according to claim 4, wherein:

the base comprises a third extending block extending outwards from one side of the second connecting hole, and a third clamping block is arranged at the tail end of the third extending block;

and a third socket is connected to the outer side of the second connecting hole, the fifth pin and the sixth pin are inserted into the third socket jack, and the third fixture block is matched with the third socket.

9. A key switch according to claim 4, wherein:

the second ends of the first switch key rod, the reset key rod and the second switch key rod are connected with keycaps;

the first contact pin, the second contact pin, the third contact pin, the fourth contact pin, the fifth contact pin and the sixth contact pin are respectively straight pins or u-shaped pins; the first contact pin is directly connected with the first static contact or connected with the first static contact through a first conducting strip, the second contact pin is directly connected with the second static contact or connected with the second static contact through a second conducting strip, the third contact pin is directly connected with the first end of the first movable contact or connected with the first movable contact through a third conducting strip, the fourth contact pin is directly connected with the second static contact or connected with the second static contact through a fourth conducting strip, the fifth contact pin is directly connected with the first end of the second movable contact or connected with the first end of the second movable contact through a fifth conducting strip, and the sixth contact pin is directly connected with the second static contact or connected with the second static contact through a sixth conducting strip.

10. A key switch according to any one of claims 1 to 3, wherein:

the base comprises a stop block, a first end of the first movable contact piece is fixed on the first side of the stop block, the first movable contact piece is bent, a second end of the first movable contact piece is positioned on the outer side of the second side of the stop block, and the first static contact piece is fixed on the second side of the stop block;

the base is clamped with the cover body.