CN111211004B

CN111211004B - Press-type switch structure

Info

Publication number: CN111211004B
Application number: CN201811389004.8A
Authority: CN
Inventors: 吴智远; 蔡戊己
Original assignee: Switchlab Shanghai Co Ltd; Gaocheng Electronics Co Ltd
Current assignee: Switchlab Shanghai Co Ltd; Gaocheng Electronics Co Ltd
Priority date: 2018-11-21
Filing date: 2018-11-21
Publication date: 2022-10-04
Anticipated expiration: 2038-11-21
Also published as: CN111211004A

Abstract

A kind of pressure-operated switch structure, is to have at least one contact module and force the breaking assembly in the body with key set, the said contact module has flexible elastic driving assembly, there are elastic conducting strips on both sides of driving assembly, one end of two elastic conducting strips is connected to the middle section of driving assembly each other, the other end of two elastic conducting strips has first, two movable contacts separately, two sides of first movable contact have normally closed contact and normally open contact, two sides of second movable contact have common contact electrically connected, there is elastic pulling piece between two elastic conducting strip middle sections, the said force breaking assembly has at least one can be driven and slipped and led the slide block, when the key set is pressed down with the normal application of force, can link and lead the slide block to press the driving assembly, make two elastic conducting strips produce the elastic deformation, and the first movable contact is contacted with normally open contact, make the common contact electrically connect with normally open contact; when the key is pressed excessively, the guide sliding block is driven to be separated from the driving assembly, so that the driving assembly drives the two elastic conducting strips to rebound to the original position, and the first movable contact is contacted with the normally closed contact.

Description

Press-type switch structure

Technical Field

The present invention relates to a press-type switch structure, and more particularly, to a press-type switch which can effectively remove carbonized substances at a contact and surely cut off an on state when pressed excessively.

Background

In the process of pressing (or holding) a conventional press-type switch (push switch), most of the conventional press-type switches only perform the action of changing from OFF to ON, can be kept conducted along with the continuous pressing (or holding) of an operator, and can perform the action of returning from ON to OFF after the pressing (or holding) state is released; however, in many applications, due to the reasons of tension, fatigue or accidental touch, when an accident or emergency occurs, the hand of the operator cannot timely release the press-type switch (push switch), but rather grips the press-type switch (push switch), so that the related machine cannot be stopped in time, thereby causing a serious disaster.

In japanese patent No. 3677199, a push switch structure is disclosed, which executes OFF-ON-OFF actions in sequence in a single push process, and the main structure of the push switch structure is that two sets of contacts and at least one normally closed contact connected in series with the two sets of contacts are arranged in a switch shell of the push switch, and a key is arranged ON the top side of the switch shell and is linked with the contacts through two switch mechanisms respectively; the contacts are respectively provided with a normally closed fixed terminal, a normally open fixed terminal and a movable terminal, one end of each of the two movable terminals is fixed in the switch shell, the middle sections of the two movable terminals are respectively connected with a pressing sheet through a spring and an actuating body, and one end of the spring is fixed on the other end part of the spring so as to allow the movable terminals to form a swinging shape.

The bottom side of the key is linked with two sliding blocks and a pressing part, one side of each sliding block is respectively propped against the corresponding inclined surface on the pressing shaft by the inclined surface, and the other end parts of the two sliding blocks respectively correspond to the upper part of the pressing sheet; the normally closed contact can extend to the lower part of the pressing part through the movable part.

When the key is pressed, the two sliding blocks and the pressing part are linked to descend, so that the other end parts of the two sliding blocks respectively push the two pressing sheets, and the two actuating bodies drive the two movable terminals to move from the normally closed fixed terminals to the normally open fixed terminals, thereby completing the action of changing from OFF to ON in the first stage.

When the key is continuously pressed until the two pressing shafts are blocked and stop moving, the two sliding blocks can slide downwards along the inclined surfaces of the two pressing shafts through the inclined surfaces; at this time, the two sliding blocks will slide transversely to make the two ends separate from the two pressing sheets, so that the two pressing sheets can return upwards to the original position through the elastic action of the spring, and the two movable terminals move from the normally open fixed terminal to the normally closed fixed terminal, thereby completing the second stage of changing from ON to OFF.

Meanwhile, the pressing part of the key can push the movable part to link the normally closed contact to change from the connection state to the disconnection state, so that the action of switching OFF the power supply from ON to OFF in the second stage can be further ensured, and the situation that the operator excessively grips the press switch due to tension, fatigue, accidental touch and the like to cause serious disasters due to the fact that the related machinery cannot stop in time is avoided.

However, in the above structure, since the two movable terminals swing along the fixed path with the other end as the fixed fulcrum during the moving process, and contact and separate from the two normally open fixed terminals, the contact portions thereof are normally maintained at the same position, and since an arc (spark) is often generated at the contact portions at the moment of the contact and the separation, if such an arc (spark) is often generated at the same position of the contact portions, carbon deposition may be caused to affect the conductivity of the movable terminals and the normally open fixed terminals, and even a failure situation such as poor contact or seizure may occur; therefore, the normal operation of the push switch and the corresponding functions can not be ensured when an accident or an emergency occurs.

In view of the above-mentioned disadvantages of the prior art push switch structure in practical applications, the present invention is directed to provide an improvement to the disadvantages.

Disclosure of Invention

The invention provides a press-type switch structure, which is characterized in that at least one contact module and a forced disconnection assembly are arranged in a shell body, the contact module is provided with a driving assembly with elasticity, elastic conducting strips are arranged on two sides of the driving assembly, one ends of the two elastic conducting strips are mutually connected to the middle section of the driving assembly, the other ends of the two elastic conducting strips are respectively provided with a first movable contact and a second movable contact, two sides of the first movable contact are provided with a normally closed contact and a normally open contact, two sides of the second movable contact are provided with a common contact which are electrically connected, an elastic pulling piece is arranged between the middle sections of the two elastic conducting strips, the forced disconnection assembly can be linked by a key to press the driving assembly, so that the two elastic conducting strips are elastically deformed, the first movable contact is in contact with the normally open contact to conduct a preset power supply, when the key is continuously pressed, the forced disconnection assembly is separated from the driving assembly to drive the two elastic conducting strips to rebound to the original position, the first movable contact is in contact with the normally closed contact to cut off the preset power supply, and thereby avoiding the situation that the mechanical disasters can not be timely stopped due to cause.

The invention also provides a press-type switch structure, wherein the first movable contact and the second movable contact can slide transversely in the elastic deformation process of the two elastic conducting sheets, and friction can be formed between the first movable contact and the normally closed contact, between the normally open contact and between the normally closed contact and the two common contacts, so that carbon deposition generated by electric arcs at the moment of power on and power off can be effectively eliminated.

In order to achieve the above objects and effects, the technical means adopted by the present invention comprises: the shell body is provided with a shell body and a key, an accommodating space is concavely arranged on the top side of the shell body, and the key covers the accommodating space; at least one contact module set under the containing space in the shell, the middle part of the contact module set is provided with a driving component with telescopic elasticity, two sides of the middle section of the driving component are respectively provided with an elastic conducting strip extending transversely, one end parts of the two elastic conducting strips are pivoted to the middle section of the driving component together, the other ends of the two elastic conducting strips are respectively provided with a first movable contact and a second movable contact, two sides of the first movable contact are respectively provided with a normally closed contact and a normally open contact, two sides of the second movable contact are respectively provided with two common contacts electrically connected with each other, an elastic pulling and holding piece is arranged between the middle sections of the elastic conducting strips, and the two elastic conducting strips are pulled and closed by the elastic pulling and holding piece under a natural state, so that the first movable contact and the second movable contact are respectively contacted with the normally closed contact and the common contact, and the normally closed contact and the common contact are kept conducted; the forced disconnection assembly is arranged below the key and is provided with at least one guide sliding block which can be driven to slide, when the key is pressed down by normal force application, the guide sliding block can be linked to abut against the driving assembly, the driving assembly drives the end parts of the two elastic conducting strips to move, and the elastic pulling and holding piece is matched to pull and hold the two elastic conducting strips between the middle sections of the two elastic conducting strips, so that the two elastic conducting strips can generate reverse elastic deformation, the first movable contact is separated from the normally closed contact and is contacted with the normally open contact, and the common contact is electrically connected with the normally open contact; when the key is pressed excessively, the guide sliding block is driven to be separated from the driving assembly, so that the driving assembly drives the two elastic conducting strips to rebound to the original position, and the first movable contact is separated from the normally open contact and is contacted with the normally closed contact.

According to the above structure, the contact module has a housing formed by combining a housing seat and a housing cover, for accommodating the driving assembly and the elastic conductive sheet, and the normally closed contact extends to the outside of the housing through the normally closed pin, the normally open contact extends to the outside of the housing through the normally open pin, and the two common contacts extend to the outside of the housing through the common pin.

According to the structure, the driving component is provided with a driving rod, a driving sheet and a reset element which are sequentially connected, and one end of the driving rod protrudes out of the shell; grooves for combining the end parts of the two elastic conducting plates are arranged on two lateral sides of the middle section of the driving plate; and the middle part of the driving sheet is provided with a middle hole for the elastic pulling and holding piece to pass through.

According to the structure, the movable seat is accommodated in the accommodating space, at least one abutting convex part is arranged on the bottom surface of the movable seat, at least one auxiliary contact module is additionally arranged below the accommodating space in the shell, the auxiliary contact module is provided with two fixed contacts which are mutually separated and connected in series with the common contact, a movable guide plate is arranged between the two fixed contacts, a linkage block is vertically arranged at the middle section of the movable guide plate, one end of the linkage block extends to the position below the abutting convex part of the movable seat, and an elastic restoring piece is arranged at the other end of the linkage block; the elastic restoring piece acts on the movable guide sheet to enable the two end parts of the movable guide sheet to be normally contacted with the two fixed contacts respectively to form conduction, and when the key is pressed down to drive the abutting convex part of the movable seat to abut against the linkage block, the linkage block can drive the movable guide sheet to be separated from the two fixed contacts to form open circuit.

According to the above structure, the auxiliary contact module has a housing accommodating the two fixed contacts and the movable guide piece, and the two fixed contacts extend to the outside of the housing through the pins, respectively.

According to the structure, at least one support is arranged at the bottom of the accommodating space, the top end of the support is provided with an inclined upper inclined plane, a stopping part is arranged in the center of the bottom side of the movable seat, and the stopping part is abutted against the bottom surface of the accommodating space through a central elastic element; the guide sliding blocks of the forced disconnection assembly are arranged on two sides of the stopping part, the bottom sides of the guide sliding blocks are provided with lower inclined planes corresponding to the upper inclined planes, an elastic piece is arranged between one side of each guide sliding block and the stopping part, and the other side of each guide sliding block is provided with a side extension part extending to the upper part of the end part of the driving assembly.

According to the structure, the center of the bottom side of the movable seat is provided with a central elastic element which abuts against the bottom surface of the accommodating space, the guide sliding block of the forced disconnection assembly is arranged between the two driving seats and abuts against the guide sliding block through an elastic piece so as to keep the guide sliding block flexible, supporting pieces are respectively arranged between the guide sliding block and the driving seats, one side of each supporting piece abuts against the guide sliding block, and the other side of each supporting piece abuts against the two end parts of the movable seat.

According to the structure, the center of the bottom side of the movable seat is provided with a supporting part with a downward gradually-reduced hole, the supporting part is internally sleeved with a slide guiding supporting part, the top side of the slide guiding supporting part is provided with an elastic part which abuts against the key, oblique convex parts which gradually expand outwards are arranged above the two sides of the slide guiding supporting part, the forced disconnection component is provided with two slide guiding blocks arranged between the two driving seats, the two slide guiding blocks are respectively provided with oblique grooves which can be sleeved on the oblique convex parts at one side, and the two slide guiding blocks are respectively provided with side extension parts which extend into the concave parts at the other side.

According to the structure, two sides of the key are respectively provided with a side part which extends into the accommodating space in a protruding way, the bottom surface of each side part is respectively provided with at least one lower convex part, the lower convex part is embedded at one end of the side elastic element, one side of the contact module is extended out of the shell and is provided with at least one upper convex part, and the upper convex part is embedded at the other end of the side elastic element; the key is supported against the driving seat by elastic elements at the lateral sides of the two side parts.

According to the structure, the press rod is transversely arranged below the key, and two ends of the press rod are obliquely abutted against the bottom surface of the accommodating space, so that the key can keep a balanced and stable press state.

Drawings

Fig. 1 is an exploded perspective view of a first embodiment of the present invention.

Fig. 2 is an exploded view of a contact module according to a first embodiment of the invention.

Fig. 3 is an overall side sectional view of the first embodiment of the present invention.

Fig. 4 is a schematic diagram (one) of a pressing operation according to a first embodiment of the present invention.

Fig. 5 is a schematic diagram (two) illustrating a pressing operation according to the first embodiment of the present invention.

Fig. 6 is a schematic diagram (iii) of a pressing operation according to the first embodiment of the invention.

Fig. 7 is an overall side sectional view of the second embodiment of the present invention.

Fig. 8 is a schematic diagram (a) illustrating a pressing operation according to a second embodiment of the present invention.

Fig. 9 is a schematic diagram (ii) of pressing operation according to the second embodiment of the present invention.

Fig. 10 is a schematic diagram (iii) illustrating a pressing operation according to a second embodiment of the present invention.

Fig. 11 is an overall side sectional view of a third embodiment of the present invention.

Fig. 12 is a schematic view (one) of pressing operation in the third embodiment of the present invention.

Fig. 13 is a schematic diagram (ii) illustrating a pressing operation in the third embodiment of the present invention.

Fig. 14 is a schematic diagram (iii) of pressing operation according to a third embodiment of the present invention.

The reference symbols in the drawings indicate:

1. 5, 7

shell body

11, 51, 71 shell

111. Support for accommodating space 112

113. Upper

inclined plane

12, 52, 72 key

121. The side of the middle convex

part

122, 522, 722

123. 523, 723 side

elastic elements

124, 524, 724 side lower protrusions

13. 53, 73 movable seat 131, 531, 731 push against the convex part

132. Elastic central element of stop part 14, 54

15. 55, 75

drive seats

151, 551, 751 elastic element

152. 552, 752 concave 16, 56, 76 pressing rod

2. Contact module 21 housing

211. Housing seat 212 housing cover

213. Upper boss 22 drive assembly

221. Reset element of driving plate 222

223. Drive rod 224 recess

225. Normally closed contact of middle hole 23

231. Normally closed pin 24 normally open contact

241. Normally open pins 25, 252 elastic conductive sheet

251. First movable contact 253 and second movable contact

255. 256 end 250 resilient pull holder

26. 260 common contact 261 common pin

3.

Auxiliary contact module

31, 32 fixed contact

311.

321 and 33 linkage block

34. Elastic restoring piece for movable guide vane 35

36.

Shell

4, 6, 8 forced disconnection assembly

41. 61, 81 lower inclined surface of guide block 411

412. 612, 812

side extensions

42, 62, 82 elastomeric member

63. Supporting part 732 supporting part

76. Inclined convex part of guide and slide support 761

811. Inclined groove

Detailed Description

The technical solutions of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1 to 3, the structure of the present invention includes: the housing 1, the contact module 2, the auxiliary contact module 3, and the forcible opening assembly 4, wherein the housing 1 has a housing 11, a top side of the housing 11 is recessed to form an accommodating space 111, two sides of a bottom of the accommodating space 111 are respectively provided with a support 112, top ends of the support 112 are respectively provided with an upper inclined plane 113 having a bevel, the accommodating space 111 is provided with a movable seat 13, a bottom side center of the movable seat 13 is provided with a stop portion 132, a lower portion of the stop portion 132 abuts against a bottom surface of the accommodating space 111 through a central elastic element 14, two sides of a bottom surface of the stop portion 132 are respectively provided with an abutting convex portion 131, the upper portion of the accommodating space 111 covers the key 12, the key 12 is transversely provided with a u-shaped pressing rod 16, two ends of the pressing rod 16 obliquely abut against the bottom surface of the accommodating space 111, a middle convex portion 121 abuts against a top side of the movable seat 13, two sides of the middle convex portion 121 of the key 12 abut against the driving seat 15 through elastic elements, bottom sides of the driving seat 15 are provided with concave portions 152, two sides of the key 12 are respectively provided with side portions 122 to the accommodating space 111, and a plurality of lower convex portions 124 are respectively embedded into the lower convex portions of the lower side elements 151.

The contact module 2 has a housing 21 disposed at the inner side of the lower portion of the housing 11, the housing 21 is formed by combining a housing seat 211 and a housing cover 212, the edge of the housing 21 extends out of the housing 11 and is provided with at least one upper protrusion 213, each upper protrusion 213 is embedded into the other end of the corresponding side elastic element 123, the middle portion of the housing 21 is provided with a driving assembly 22, the driving assembly 22 has a driving rod 223, a driving plate 221 and a reset element 222 which are connected with each other, one end of the driving rod 223 protrudes out of the concave portion 152 of the driving seat 15, two sides of the middle section of the driving plate 221 are respectively provided with elastic conductive plates 25, 252 which protrude transversely, one end of each elastic conductive plate 25, 252 has an end 255, 256 which are in an arch shape, the two sides (upper and lower positions in the figure) of the first movable contact 251 are respectively provided with a normally closed contact 23 and a normally open contact 24, the normally closed contact 23 and the normally open contact 24 respectively extend out of the housing 21 through the normally closed pin 231 and the normally open pin 241, the two sides (upper and lower positions in the figure) of the second movable contact 253 are respectively provided with common contacts 26 and 260 electrically connected with each other, the common contacts 26 and 260 extend out of the housing 21 through the common pin 261, and an elastic pulling member 250 penetrating through a preset middle hole 225 in the driving sheet 221 is arranged between the middle sections of the two elastic conductive sheets 25 and 252.

In a natural state, the two elastic

conductive sheets

25 and 252 are pulled by the elastic pulling member 250, so that the first movable contact 251 contacts the normally closed contact 23, the second movable contact 253 contacts the common contact 26, and the normally closed pin 231 and the common pin 261 are kept in conduction.

The auxiliary contact module 3 has a shell 36 disposed at the middle part inside the lower part of the housing 11, two fixed

contacts

31, 32 separated from each other are disposed in the shell 36, the fixed

contacts

31, 32 are respectively connected with the

pins

311, 321, a movable guide 34 is disposed between the two fixed

contacts

31, 32, a linkage block 33 is vertically disposed at the middle section of the movable guide 34, one end of the linkage block 33 protrudes to the lower part of the abutting convex part 131 of the movable base 13, and the other end of the linkage block 33 abuts against the bottom of the shell 36 by an elastic restoring part 35; the elastic restoring member 35 acts on the movable guide 34 to make the two ends normally contact with the two fixed

contacts

31, 32 respectively to form conduction.

In one possible embodiment, one of the fixed

contacts

31, 32 can be connected to the common pin 261, so that the auxiliary contact module 3 and the contact module 2 are connected in series.

The forcible opening assembly 4 is disposed between the key 12 and the movable seat 13, and has two guiding blocks 41 disposed on two sides of the stopping portion 132, wherein the bottom side of the guiding block 41 has a lower inclined surface 411 corresponding to the upper inclined surface 113, an elastic member 42 is disposed between the guiding block 41 and the stopping portion 132, and the other side of the guiding block 41 has a side extension 412 extending into the recess 152.

As shown in fig. 4 to 6, in the first embodiment of the present invention, when the key 12 is pressed, the pressing rod 16 can be completely supported below the key 12 to keep balance (even if only one side is pressed, a stable pressing state can be formed), meanwhile, two sides of the key 12 respectively push the driving seat 15 to descend through the elastic element 151, the side portions 122 of the two sides compress the side elastic element 123, the middle protrusion 121 pushes the movable seat 13 to compress the central elastic element 14, two ends of the movable seat 13 push the two sliding guide blocks 41 to descend synchronously, so that the extending portions 412 on two sides respectively push the driving rod 223 of the contact module 2, the driving rod 223 drives one end of the two elastic conductive sheets 25 and 252 to move through the driving sheet 221, and the elastic pulling member 250 pulls between the middle sections of the two elastic conductive sheets 25 and 252, so that the two elastic conductive sheets 25 and 252 generate reverse elastic deformation, so that the first and second movable contacts 251 and 253 are separated from the normally closed contact 23, the common contact 24 and the common contact 260, and the normally open contact 231 is formed at this time, and the common contact pin 241 is connected to the normally open (as shown in fig. 4).

In the process of elastic deformation of the two elastic

conductive sheets

25, 252, the two ends 255, 256 are driven by the driving sheet 221, so that the first and second

movable contacts

251, 253 can slide laterally, and carbon deposition caused by electric arc generated at the moment of power on and power off can be effectively eliminated by the friction between the first and second

movable contacts

251, 253 and the normally closed contact 23, the normally open contact 24 and the

common contacts

26, 260 during sliding.

If the key 12 is pressed excessively, the lower inclined surface 411 of the guide block 41 will slide along the upper inclined surface 113 of the support 112, so that the two guide blocks 41 slide toward the stopping portion 132 of the movable base 13, at this time, the two side extending portions 412 disengage from the driving rod 223, the two elastic

conductive sheets

25, 252 can be restored to the initial positions by the elastic action of the reset element 222, the first and second

movable contacts

251, 253 disengage from the normally open contact 24, the common contact 260 and contact with the normally closed contact 23, the common contact 26, and the common pin 261 and the normally open pin 241 are disconnected, so as to cut off the predetermined power (as shown in fig. 5).

If the key 12 is continuously pressed, the middle protrusion 121 continues to push the movable seat 13 to descend, so that the abutting protrusion 131 abuts against the linkage block 33 of the auxiliary contact module 3, the linkage block 33 drives the movable guide sheet 34 to separate from the two fixed

contacts

31, 32, and the pin 311 and the pin 321 form an open circuit (as shown in fig. 6), thereby forming another safety mechanism for cutting off the power supply between the contact module 2 and the predetermined power supply.

After the key 12 is released, the side part 122 is pushed by the elasticity of the side elastic element 123, so that the key 12 can be restored to the original position; the movable seat 13 can be supported to return to the original position by the elasticity of the central elastic element 14; the guide block 41 is supported to be returned to the original position by the elasticity of the elastic member 42.

Example two:

as shown in fig. 7 to 10, the structure of the present invention includes: a shell body 5, a forced disconnection component 6, a contact module 2 and an auxiliary contact module 3 which are the same as the first embodiment; the housing body 5 has a housing 51, a top side of the housing 51 is recessed with a receiving space, the receiving space has a movable seat 53 therein, a center of a bottom side of the movable seat 53 is provided with a central elastic element 54 abutting against a bottom surface of the receiving space, two sides of the bottom surface of the movable seat 53 are respectively provided with abutting convex parts 531, the top of the receiving space is covered with a key 52, a reversed-U-shaped pressing rod 56 is transversely provided below the key 12, two ends of the pressing rod 56 obliquely abut against the bottom surface of the receiving space, two sides of the key 52 are respectively provided with a side part 522 extending into the receiving space, a plurality of lower convex parts 524 are respectively provided at a bottom side of each side part 522, each lower convex part 524 is respectively embedded into one end of the side elastic element 523, an upper convex part 213 of the contact module 2 is respectively embedded into the other end of the side elastic element 523, the other sides of the key 52 abut against the driving seat 55 with the elastic elements 551 respectively, the driving seat 55 is hooked on two end edges of the movable seat 53, and a concave part 552 is provided at a bottom side of each driving seat 55.

The forcible opening assembly 6 is disposed between the key 52 and the movable seat 53, and has two guiding sliders 61 disposed between the two driving seats 55, an elastic member 62 is disposed between the two guiding sliders 61, and a square ring-shaped or sheet-shaped supporting member 63 is disposed between the two guiding sliders 61 and the two driving seats 55, one side of the supporting member 63 abuts against the guiding sliders 61, the other side of the supporting member 63 abuts against both ends of the movable seat 53, and a side extension portion 612 extending into the concave portion 552 is disposed beside each guiding slider 61.

In the present embodiment, the contact module 2 and the auxiliary contact module 3 are respectively disposed at two sides and near the center of the lower portion of the housing 51; wherein the driving rod 223 of the contact module 2 protrudes into the concave portion 552 of the driving seat 55 and is located below the side extension 612, and the linkage block 33 of the auxiliary contact module 3 protrudes below the abutting protrusion 531 of the movable seat 53.

In operation, when the key 52 is pressed, the pressing rod 56 is supported under the key 52 completely to keep it in a balanced and stable pressing state, meanwhile, two sides of the key 52 push the driving seat 55 to descend through the elastic element 551, the side portions 522 at two sides compress the side elastic element 523, and the middle portion directly pushes the movable seat 53 through the two guiding blocks 61 to compress the central elastic element 54, meanwhile, the two side extending portions 612 push the driving rod 223 of the contact module 2, the driving rod 223 drives the two elastic

conductive sheets

25, 252 to generate elastic deformation through the driving sheet 221, so that the first and second

movable contacts

251, 253 separate from the normally closed contact 23, the common contact 26 to contact the normally open contact 24, the common contact 260, and the common pin 261 and the normally closed pin 231 form an open circuit to be connected to the normally open pin 241 (as shown in fig. 8), thereby conducting the preset power.

If the key 52 is pressed excessively, the driving seat 55 will abut against the bottom surface of the accommodating space and stop descending, the two supporting members 63 will generate a pushing force toward the guiding slide block 61 when pressed, so that the two guiding slide blocks 61 abut against each other and compress the elastic member 62, at this time, the two side extending portions 612 disengage from the driving rod 223, and by means of the elastic action of the reset element 222, the two elastic

conductive sheets

25, 252 can restore to the initial positions, the first and second

movable contacts

251, 253 disengage from the normally open contact 24, the common contact 260 and contact with the normally closed contact 23, the common contact 26, and at this time, the common contact 261 and the normally open contact 241 form an open circuit, so as to cut off the preset power supply (as shown in fig. 9).

If the key 52 is pressed continuously, the two guide sliders 61 push the movable seat 53 to descend, so that the abutting protrusion 531 abuts against the linkage block 33 of the auxiliary contact module 3, and the linkage block 33 drives the movable guide tab 34 to separate from the two fixed

contacts

31, 32, so that the pin 311 and the pin 321 form an open circuit (as shown in fig. 10), thereby forming another safety mechanism for cutting off the power supply between the contact module 2 and the predetermined power supply.

After the key 52 is released, the side 522 is pushed by the elasticity of the side elastic element 523, so that the key 52 can be restored to the original position; the movable seat 53 can be supported to return to the original position by the elasticity of the central elastic element 54; the guide block 61 is supported by the elasticity of the elastic member 62 to be returned to its original position.

Example three:

as shown in fig. 11 to 14, the structure of the present invention includes: a shell body 7, a forced disconnection component 8, and a contact module 2 and an auxiliary contact module 3 which are the same as those of the first embodiment; the housing body 7 has a housing 71, a top side of the housing 71 is recessed with a receiving space, the receiving space is provided with a movable seat 73, a bottom center of the bottom side of the movable seat 73 is provided with a supporting portion 732 with a downward tapered hole, two sides of the supporting portion 732 are respectively provided with a top-contacting protrusion 731, the top of the receiving space is covered with a key 72, a u-shaped pressing rod 76 is transversely provided below the key 72, two ends of the pressing rod 76 obliquely contact against the bottom of the receiving space, two sides of the key 72 are respectively provided with a side portion 722 extending into the receiving space, a bottom side of each side portion 722 is respectively provided with a plurality of bottom protrusions 724, each bottom protrusion 724 is respectively embedded into one end of a side elastic member 723, an upper protrusion 213 of the contact module 2 is respectively embedded into the other end of the side elastic member 723, the other two sides 722 of the key 72 respectively contact the driving seat 75 with elastic members 751, a bottom side of each driving seat 75 is provided with a recess, a sliding guide support 76 is sleeved in the supporting portion 732, the top side of the sliding support 76 is provided with an elastic member 82 contacting against the key 72, and an outward inclined protrusion 752 is gradually arranged above the two sides of the sliding support 76.

The forcible opening assembly 8 is disposed between the push button 72 and the movable seat 73, and has two guide sliders 81 disposed between the two driving seats 75, the two guide sliders 81 are respectively provided at one side thereof with an inclined groove 811 engaging with each inclined protrusion 761, and the two guide sliders 81 are respectively provided at the other side thereof with a side extension 812 extending into the concave portion 752.

In the present embodiment, the contact module 2 and the auxiliary contact module 3 are respectively disposed at two sides and near the center of the lower portion of the housing 71; wherein the driving rod 223 of the contact module 2 protrudes into the concave portion 752 of the driving seat 75 and is located under the side extension portion 812, and the linking block 33 of the auxiliary contact module 3 protrudes to the movable seat 73 and abuts against the convex portion 731.

In operation, when the key 72 is pressed, the pressing rod 76 can be completely supported below the key 72 to keep a balanced and stable pressing state, meanwhile, two sides of the key 72 respectively push the driving seat 75 to descend through the elastic element 751, the side portions 722 at two sides compress the side elastic elements 723, the middle portion directly pushes the movable seat 73 to descend through the two guide sliders 81, meanwhile, the two side extending portions 812 respectively push the driving rod 223 of the contact module 2, the driving rod 223 drives the two elastic

conductive sheets

movable contacts

251, 253 are respectively separated from the normally closed contact 23, the common contact 26 to contact the normally open contact 24, the common contact 260, and at this time, the common contact 261 and the normally closed contact 231 form an open circuit to be conducted with the normally open contact 241 (as shown in fig. 12), thereby conducting a preset power supply.

If the key 72 is pressed excessively, the driving seat 75 and the sliding support 76 will respectively abut against the bottom surface of the accommodating space to stop descending, and the sliding support 76 will compress the elastic component 82, and the inclined grooves 811 of the two sliding blocks 81 will respectively fit along the direction of the inclined protrusion 761, so that the two sliding blocks 81 will abut against each other, at this time, the extending portions 812 at both sides are separated from the driving rod 223, and by the elastic action of the reset component 222, the two elastic

conductive sheets

25, 252 can recover the initial position, the first and second

movable contacts

251, 253 will be separated from the normally open contact 24 and the common contact 260 to contact the normally closed contact 23 and the common contact 26, at this time, the common contact 261 and the normally open contact 241 will form an open circuit, so as to cut off the preset power supply (as shown in fig. 13).

If the key 72 is continuously pressed, the two guide blocks 81 push the movable seat 73 to descend continuously, so that the abutting protrusion 731 abuts against the linking block 33 of the auxiliary contact module 3, and the linking block 33 drives the movable guide sheet 34 to separate from the two fixed

contacts

31, 32, so that the pin 311 and the pin 321 form an open circuit (as shown in fig. 14), thereby forming another safety mechanism for cutting off the power between the contact module 2 and the predetermined power source.

After the key 72 is released, the side portion 722 is pushed by the elasticity of the side elastic element 723, so that the key 72 can be restored to the original position; the elastic member 82 is used to support the sliding block 81 and the sliding support 76 to return to the original position.

In summary, the above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A press-type switch structure, comprising:

the shell body is provided with a shell and a key, the top side of the shell is concavely provided with an accommodating space, and the key covers the accommodating space;

at least one contact module set under the containing space in the shell, the middle part of the contact module set is provided with a driving component with telescopic elasticity, two sides of the middle section of the driving component are respectively provided with an elastic conducting strip extending transversely, one end parts of the two elastic conducting strips are pivoted to the middle section of the driving component together, the other ends of the two elastic conducting strips are respectively provided with a first movable contact and a second movable contact, two sides of the first movable contact are respectively provided with a normally closed contact and a normally open contact, two sides of the second movable contact are respectively provided with two common contacts electrically connected with each other, an elastic pulling and holding piece is arranged between the middle sections of the two elastic conducting strips, and under the natural state, the two elastic conducting strips are pulled and closed by the elastic pulling and holding piece, so that the first movable contact and the second movable contact are respectively contacted with the normally closed contact and the common contact to keep the normally closed contact and the common contact on;

the forced disconnection assembly is arranged below the key and is provided with at least one guide sliding block which can be driven to slide, when the key is pressed down by normal force application, the guide sliding block can be linked to abut against the driving assembly, the driving assembly drives the end parts of the two elastic conducting strips to move, and the elastic pulling and holding piece is matched to pull and hold the two elastic conducting strips between the middle sections of the two elastic conducting strips, so that the two elastic conducting strips can generate reverse elastic deformation, the first movable contact is separated from the normally closed contact and is contacted with the normally open contact, and the common contact is electrically connected with the normally open contact; when the key is pressed excessively, the guide sliding block is driven to be separated from the driving assembly, so that the driving assembly drives the two elastic conducting strips to rebound to the original position, and the first movable contact is separated from the normally open contact and is contacted with the normally closed contact.

2. The structure of claim 1, wherein the contact module has a housing formed by assembling a housing seat and a housing cover for accommodating the driving component and the elastic conductive sheet, the normally closed contact extends out of the housing through a normally closed pin, the normally open contact extends out of the housing through a normally open pin, and the two common contacts extend out of the housing through a common pin.

3. The structure of claim 2, wherein the driving assembly has a driving rod, a driving plate and a reset element, which are sequentially connected, and one end of the driving rod protrudes out of the housing; grooves for combining the end parts of the two elastic conducting plates are arranged on two lateral sides of the middle section of the driving plate; and the middle part of the driving sheet is provided with a middle hole for the elastic pulling and holding piece to pass through.

4. A pressing switch structure according to any one of claims 1 to 3, wherein a movable seat is disposed in the accommodating space, at least one abutting protrusion is disposed on a bottom surface of the movable seat, at least one auxiliary contact module is disposed below the accommodating space in the housing, the auxiliary contact module has two fixed contacts separated from each other and connected in series to the common contact, a movable guide is disposed between the two fixed contacts, a linkage block is vertically disposed in a middle section of the movable guide, one end of the linkage block protrudes below the abutting protrusion of the movable seat, and an elastic restoring member is disposed at the other end of the linkage block; the elastic restoring piece acts on the movable guide sheet to enable two end parts of the movable guide sheet to be normally contacted with the two fixed contacts respectively to form conduction, and when the key is pressed down to drive the abutting convex part of the movable seat to abut against the linkage block, the linkage block can drive the movable guide sheet to be separated from the two fixed contacts to form open circuit.

5. The structure of claim 4, wherein the auxiliary contact module has a housing for accommodating the two fixed contacts and the movable guide, and the two fixed contacts extend out of the housing through the pins respectively.

6. A structure of a push-type switch according to any one of claims 1 to 3, wherein a movable seat is disposed in the accommodating space, at least one support is disposed at the bottom of the accommodating space, an upper inclined surface of the support is formed at the top end of the support, and a stop portion is disposed at the center of the bottom side of the movable seat and abuts against the bottom surface of the accommodating space via a central elastic element; the guide sliding blocks of the forced disconnection assembly are arranged on two sides of the stopping portion, the bottom sides of the guide sliding blocks are provided with lower inclined surfaces corresponding to the upper inclined surfaces, an elastic piece is arranged between one side of each guide sliding block and the stopping portion, and the other side of each guide sliding block is provided with a side extension portion extending to the upper portion of the end portion of the driving assembly.

7. The structure of claim 4, wherein at least one support is disposed at the bottom of the accommodating space, the support has a tapered upper slope at the top, and a stop portion is disposed at the center of the bottom of the movable base and abuts against the bottom of the accommodating space through a central elastic element; the guide sliding blocks of the forced disconnection assembly are arranged on two sides of the stopping part, the bottom sides of the guide sliding blocks are provided with lower inclined planes corresponding to the upper inclined planes, an elastic piece is arranged between one side of each guide sliding block and the stopping part, and the other side of each guide sliding block is provided with a side extension part extending to the upper part of the end part of the driving assembly.

8. The structure of claim 5, wherein the bottom of the accommodating space is provided with at least one support, the top of the support is provided with a tapered upper inclined surface, and the bottom center of the movable seat is provided with a stop portion, the stop portion is abutted against the bottom surface of the accommodating space through a central elastic element; the guide sliding blocks of the forced disconnection assembly are arranged on two sides of the stopping portion, the bottom sides of the guide sliding blocks are provided with lower inclined surfaces corresponding to the upper inclined surfaces, an elastic piece is arranged between one side of each guide sliding block and the stopping portion, and the other side of each guide sliding block is provided with a side extension portion extending to the upper portion of the end portion of the driving assembly.

9. A structure of a press-type switch as claimed in any one of claims 1 to 3, wherein a movable seat is disposed in the accommodating space, a central elastic element is disposed at the center of the bottom side of the movable seat and abuts against the bottom surface of the accommodating space, the guide block of the forced disconnection assembly is disposed between the two driving seats and abuts against the guide block via an elastic member to keep the guide block in a movable state, supporting members are disposed between the guide block and the driving seats, the supporting members abut against the guide block at one side and abut against the two end portions of the movable seat at the other side.

10. The structure of claim 4, wherein a central elastic element is disposed at the center of the bottom side of the movable seat to abut against the bottom surface of the accommodating space, the guide block of the forced disconnection assembly is disposed between the two driving seats and abuts against the guide block via an elastic member to keep the guide block flexible, and supporting members are disposed between the guide block and the driving seats, respectively, one side of each supporting member abuts against the guide block, and the other side of each supporting member abuts against the two end portions of the movable seat.

11. The structure of claim 5, wherein a central elastic element is disposed at the center of the bottom of the movable seat to abut against the bottom of the accommodating space, the guide block of the forced disconnection assembly is disposed between the two driving seats, and abuts against the guide block via an elastic member to keep the guide block flexible, and supporting members are disposed between the guide block and the driving seats, respectively, one side of each supporting member abuts against the guide block, and the other side of each supporting member abuts against the two ends of the movable seat.

12. The structure of any one of claims 1 to 3, wherein the guide block of the forced disconnection assembly is disposed between two driving seats, the bottom of each driving seat is provided with a concave portion, the accommodating space accommodates a movable seat, the center of the bottom of the movable seat is provided with a supporting portion with a downwardly tapered hole, a sliding support is sleeved in the supporting portion, the top of the sliding support is provided with an elastic member abutting against the button, and inclined convex portions gradually expanding outward are disposed above two sides of the sliding support, the forced disconnection assembly is provided with two guide blocks disposed between the two driving seats, the two guide blocks are respectively provided with an inclined groove on one side that can be fitted over each inclined convex portion, and the two guide blocks are respectively provided with a side extension portion extending into the concave portion on the other side.

13. The structure of a press-type switch according to claim 4, wherein the guide block of the forced disconnection assembly is disposed between two driving seats, the bottom of the driving seats is provided with a concave portion, the center of the bottom of the movable seat is provided with a supporting portion with a downward tapered hole, the supporting portion is sleeved with a slide guide support, the top of the slide guide support is provided with a resilient member for abutting against the button, and the slide guide support is provided with an inclined protrusion portion extending outward gradually on both sides, the forced disconnection assembly is provided with two guide blocks disposed between the two driving seats, the two guide blocks are respectively provided with an inclined groove on one side for engaging with the inclined protrusion portion, and the two guide blocks are respectively provided with a side extension portion extending into the concave portion on the other side.

14. A push-type switch structure according to claim 5, wherein the guide block of the forced disconnection assembly is disposed between two driving seats, the bottom of the driving seat is provided with a concave portion, the center of the bottom of the movable seat is provided with a supporting portion with a downward tapered hole, the supporting portion is sleeved with a guide support, the top of the guide support is provided with a resilient member for abutting against the button, and two sides of the guide support are provided with inclined protrusions gradually expanding outward, the forced disconnection assembly is provided with two guide blocks disposed between the two driving seats, the two guide blocks are respectively provided with an inclined groove at one side for engaging with each inclined protrusion, and the two guide blocks are respectively provided with a side extension portion extending into the concave portion at the other side.

15. The structure of a press-type switch according to any one of claims 1 to 3, wherein the push button has side portions protruding into the accommodating space at two sides thereof, each of the side portions has at least one lower protrusion at a bottom surface thereof, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and has at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is also supported against the driving seat by elastic elements at the lateral sides of the two side parts.

16. The structure of claim 4, wherein the key has two sides respectively provided with a side portion protruding into the receiving space, each side portion has a bottom surface respectively provided with at least one lower protrusion, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and is provided with at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is supported against the driving seat by elastic elements at the lateral sides of the two side parts.

17. The structure of claim 5, wherein the push button has side portions protruding into the receiving space at two sides thereof, each side portion has at least one lower protrusion at a bottom surface thereof, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and has at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is also supported against the driving seat by elastic elements at the lateral sides of the two side parts.

18. The structure of claim 6, wherein the push button has side portions protruding into the receiving space at two sides thereof, each side portion has at least one lower protrusion at a bottom surface thereof, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and has at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is supported against the driving seat by elastic elements at the lateral sides of the two side parts.

19. The structure of claim 7, wherein the push button has side portions protruding into the receiving space at two sides thereof, each side portion has at least one lower protrusion at a bottom surface thereof, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and has at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is also supported against the driving seat by elastic elements at the lateral sides of the two side parts.

20. The structure of claim 8, wherein the push button has side portions protruding into the receiving space at two sides thereof, each side portion has at least one lower protrusion at a bottom surface thereof, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and has at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is supported against the driving seat by elastic elements at the lateral sides of the two side parts.

21. The structure of claim 9, wherein the push button has side portions protruding into the receiving space at two sides thereof, each side portion has at least one lower protrusion at a bottom surface thereof, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and has at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is also supported against the driving seat by elastic elements at the lateral sides of the two side parts.

22. The structure of claim 10, wherein the key has two sides respectively provided with a side portion protruding into the receiving space, each side portion has a bottom surface respectively provided with at least one lower protrusion, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and is provided with at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is supported against the driving seat by elastic elements at the lateral sides of the two side parts.

23. The structure of claim 11, wherein the push button has side portions protruding into the receiving space at two sides thereof, each side portion has at least one lower protrusion at a bottom surface thereof, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and has at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is also supported against the driving seat by elastic elements at the lateral sides of the two side parts.

24. The structure of a press-type switch as claimed in claim 12, wherein the key has two sides respectively provided with a side portion protruding into the accommodating space, each side portion has a bottom surface respectively provided with at least one lower protrusion, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and is provided with at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is also supported against the driving seat by elastic elements at the lateral sides of the two side parts.

25. The structure of claim 13, wherein the push button has side portions protruding into the receiving space at two sides thereof, each side portion has at least one lower protrusion at a bottom surface thereof, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and has at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is also supported against the driving seat by elastic elements at the lateral sides of the two side parts.

26. The structure of claim 14, wherein the key has two sides respectively provided with a side portion protruding into the receiving space, each side portion has a bottom surface respectively provided with at least one lower protrusion, the lower protrusion is embedded in one end of the side elastic element, one side of the contact module protrudes out of the housing and is provided with at least one upper protrusion, and the upper protrusion is embedded in the other end of the side elastic element; the key is also supported against the driving seat by elastic elements at the lateral sides of the two side parts.

27. A push-type switch structure according to any one of claims 1 to 3, wherein a push rod is transversely disposed below the push button, and two ends of the push rod obliquely abut against the bottom surface of the accommodating space, so that the push button can maintain a balanced and stable push state.

28. The structure of claim 4, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

29. A push-type switch structure according to claim 5, wherein a push rod is transversely disposed below the key, and two ends of the push rod obliquely abut against the bottom surface of the accommodating space, so that the key can be kept in a balanced and stable push state.

30. The structure of claim 6, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

31. The structure of claim 7, wherein a pressing rod is transversely disposed below the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

32. The structure of claim 8, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

33. The structure of claim 9, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

34. The structure of claim 10, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

35. The structure of claim 11, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

36. The structure of claim 12, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

37. The structure of claim 13, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

38. The structure of claim 15, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

39. The structure of claim 16, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod are inclined against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

40. The structure of claim 17, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

41. The structure of claim 18, wherein a pressing rod is transversely disposed below the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

42. The structure of claim 19, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod are inclined against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

43. The structure of claim 20, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod are obliquely abutted against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

44. The structure of claim 21, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

45. The structure of claim 22, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

46. The structure of claim 23, wherein a pressing rod is transversely disposed below the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

47. The structure of claim 24, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod are obliquely abutted against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

48. The structure of claim 25, wherein a pressing rod is transversely disposed under the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.

49. The structure of claim 26, wherein a pressing rod is transversely disposed below the key, and two ends of the pressing rod obliquely abut against the bottom surface of the accommodating space, so that the key can maintain a balanced and stable pressing state.