CN109841444B

CN109841444B - Combined switch

Info

Publication number: CN109841444B
Application number: CN201910241861.1A
Authority: CN
Inventors: 李宛姗; 郑钱存; 王轶平
Original assignee: DONGGUAN NINGRUI SWITCH CO LTD
Current assignee: DONGGUAN NINGRUI SWITCH CO LTD
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2024-01-09
Anticipated expiration: 2039-03-28
Also published as: CN109841444A

Abstract

The invention relates to a combination switch, comprising: a base, wherein a blocking part is convexly arranged on the base; the switching assembly comprises a conductive sheet, an electrode sheet, a movable contact sheet and a transmission piece; the transmission piece comprises a first transmission piece, a second transmission piece and a third transmission piece; the movable contact piece is movably abutted against the conductive piece; the lock catch assembly comprises a lock catch plate, a lock catch plate spring and a baffle plate; one end of the latch plate spring is abutted against the latch plate, and the other end is abutted against the blocking part; the locking plate is convexly provided with a first clamping tongue and a second clamping tongue, the first clamping tongue locks the first transmission piece, and the second clamping tongue locks the second transmission piece; the locking plate is also convexly provided with an unlocking part, and the unlocking part corresponds to the third transmission piece. Above-mentioned combination switch, simple structure, convenient to use, through the collocation of locking plate and separation blade, optionally trigger any one of first driving medium, second driving medium and third driving medium and realize corresponding function, can also brake through the third driving medium simultaneously, powerful can realize different functions.

Description

Combined switch

Technical Field

The invention relates to the technical field of mechanical switches, in particular to a combination switch.

Background

With the continuous improvement of the living standard of people, various household appliances and electronic lighting fixtures are widely put into the life of people, such as a stirrer, a blowing cylinder or a lighting desk lamp.

In the conventional technology, an electric appliance control switch adopts a rotary switch or a key switch, and an electronic control switch adopts a light touch switch to cover a PC film. The rotary switch, when the action bars rotate, can produce wearing and tearing between its and the spacing arch, use for a long time, spacing bellied spacing effect is poor, and the action bars also can wearing and tearing to can influence the contact of conducting strip and static contact, and the action bars card is in spacing protruding position easily, thereby makes the conducting strip switch on with two static contact simultaneously, makes its working property unstable. The key switch has the problems of inconvenient insertion and wiring, more parts, high manufacturing cost and poor stability. At present, no better treatment method exists.

Disclosure of Invention

Based on the above, the invention provides the combined switch which has the advantages of simple and reasonable structure, small space occupation, convenient use, high on-off current, good hand feeling and capability of switching different functions.

In order to achieve the purpose of the invention, the invention adopts the following technical scheme:

a combination switch, comprising:

the base is convexly provided with a blocking part;

the switching component is mounted on the base; the switching assembly comprises conducting plates and electrode plates which are arranged at intervals, a plurality of movable contact plates movably mounted on the electrode plates, and a transmission piece respectively abutted against each movable contact plate; the transmission parts comprise a first transmission part, a second transmission part and a third transmission part; the first transmission piece and the second transmission piece are positioned on the same side of the third transmission piece; the movable contact piece is used for movably abutting against the conductive piece so as to enable the electrode piece to be electrically communicated with the conductive piece; a kind of electronic device with high-pressure air-conditioning system

The lock catch assembly is arranged on the base; the lock catch assembly comprises a lock catch plate, a lock catch plate spring arranged at one end of the lock catch plate and a baffle plate positioned at one side surface of the lock catch plate; the baffle is positioned between the first transmission piece and the second transmission piece; the locking plate is clamped between the base and the transmission piece; one end of the latch plate spring is abutted against the latch plate, and the other end is abutted against the blocking part; the locking plate is convexly provided with a first clamping tongue and a second clamping tongue, the first clamping tongue is used for locking the first transmission piece, and the second clamping tongue is used for locking the second transmission piece; the locking plate is far away from one end of the first clamping tongue and one end of the second clamping tongue are further provided with unlocking parts in a protruding mode, the unlocking parts correspond to the third transmission parts, and the third transmission parts push the unlocking parts to drive the locking plate to move and unlock the first transmission parts and the second transmission parts.

Above-mentioned combination switch, simple structure is reasonable, convenient to use, through the collocation of locking plate and separation blade, optionally trigger any one of first driving medium, second driving medium and third driving medium and realize corresponding function, can also brake through the third driving medium simultaneously, powerful can realize different functions.

In one embodiment, a first recess and a second recess are arranged at one end of the locking plate away from the locking plate spring at intervals; the first recess is used for accommodating the first transmission piece, and the second recess is used for accommodating the second transmission piece; the first clamping tongue is connected in the first concave, and the second clamping tongue is connected in the second concave.

In one embodiment, a first hook portion is convexly arranged on one side of the first transmission member, and the first hook portion corresponds to the first clamping tongue; a second clamping hook part is convexly arranged on one side of the second transmission piece, and the second clamping hook part corresponds to the second clamping tongue; one side of the third transmission piece is convexly provided with a pushing part, and the pushing part corresponds to the unlocking part.

In one embodiment, the electrode sheet comprises a first electrode sheet and a second electrode sheet which are arranged at intervals, and a current limiting element connected between the first electrode sheet and the second electrode sheet; the movable contact piece comprises a first movable contact piece which is interactively arranged on the first electrode piece, and a second movable contact piece and a third movable contact piece which are movably arranged on the second electrode piece; the first movable contact piece is abutted against the first transmission piece, the second movable contact piece is abutted against the second transmission piece, and the third movable contact piece is abutted against the third transmission piece.

In one embodiment, the transmission piece comprises a transmission rod, a pressure spring and a sliding cylinder, wherein the pressure spring and the sliding cylinder are movably installed in one end of the transmission rod; a column hole is formed in one end of the transmission rod, and the column hole accommodates the pressure spring and the sliding cylinder; one end of the pressure spring is abutted against the bottom of the column hole, and the other end of the pressure spring is abutted against the sliding cylinder; the sliding cylinder protrudes beyond the end part of the transmission rod and then abuts against the movable contact piece.

In one embodiment, the opposite sides of the middle part of the first transmission member are respectively provided with a first rotating shaft in a protruding manner, the opposite sides of the middle part of the second transmission member are respectively provided with a second rotating shaft in a protruding manner, and the opposite sides of the middle part of the third transmission member are respectively provided with a third rotating shaft in a protruding manner; the first rotating shaft, the second rotating shaft and the third rotating shaft are all pivoted on the base.

In one embodiment, a containing cavity is formed in one surface of the base, a plurality of through holes are formed in the base, corresponding to the containing cavity, at equal intervals, and the through holes correspond to the transmission parts one by one.

In one embodiment, the combination switch further comprises an operation key assembly, wherein the operation key assembly comprises three operation keys arranged side by side; one end of each operating key is provided with a pivot part, and the pivot parts are correspondingly pivoted on the base; the other end of each operating key is provided with two connecting arms, and the two connecting arms penetrate through the through holes and are pivoted with one end, far away from the movable contact piece, of the transmission piece.

In one embodiment, one end of the base, which faces the operation key assembly, corresponding to each through hole is respectively provided with a positioning column in a protruding mode, and each positioning column is used for sleeving a reset spring; a fixed seat is also convexly arranged between the two corresponding connecting arms on the operating key, and the fixed seat corresponds to the positioning column; one end of the reset spring is sleeved with the positioning column, and the other end of the reset spring is abutted against the fixing seat.

In one embodiment, the combination switch further comprises a rear cover connected to one side of the base; the base is characterized in that a plurality of clamping teeth are convexly arranged at one end of the base at uniform intervals, a plurality of buckling parts are connected at one end of the rear cover at uniform intervals, and the buckling parts correspond to the clamping teeth one by one.

Drawings

FIG. 1 is a schematic perspective view of a combination switch according to a preferred embodiment of the present invention;

FIG. 2 is a perspective view of the combination switch of FIG. 1 from another perspective;

FIG. 3 is an exploded view of the combination switch of FIG. 1;

FIG. 4 is an exploded view of the combination switch of FIG. 3 from another perspective;

FIG. 5 is a perspective view of a base of the combination switch of FIG. 4;

FIG. 6 is a perspective view of the rear cover of the combination switch of FIG. 4;

FIG. 7 is a schematic perspective view of a switching assembly and a latch assembly of the combination switch shown in FIG. 4;

FIG. 8 is a perspective view of another view of the switching assembly of the combination switch of FIG. 7;

FIG. 9 is a schematic diagram of the cooperation of the switching assembly and the latch assembly in the combination switch shown in FIG. 8, wherein the switching assembly and the latch assembly do not include a conductive sheet and an electrode sheet;

FIG. 10 is a schematic view of the switch assembly and the latch assembly of the combination switch of FIG. 9, excluding the conductive sheet and the electrode sheet;

FIG. 11 is an exploded view of another view of the latch assembly of the combination switch of FIG. 7.

The drawings are marked with the following description:

10-base, 11-latch, 12-first slot, 13-second slot, 14-blocking part, 15-through hole, 16-first rotating shaft seat, 17-positioning column, 18-reset spring;

20-a rear cover, 21-a buckling part, 22-a second rotating shaft seat and 23-a reinforcing block;

30-switching components, 31-conducting strips, 32-electrode strips, 321-first electrode strips, 322-second electrode strips, 323-current limiting elements, 33-movable contact strips, 331-first movable contact strips, 332-second movable contact strips, 333-third movable contact strips, 34-transmission parts, 35-first transmission parts, 350-first rotating shafts, 351-first clamping hook parts, 36-second transmission parts, 360-second rotating shafts, 361-second clamping hook parts, 37-third transmission parts, 370-third rotating shafts and 371-pushing parts;

40-lock catch components, 41-lock catch plates, 42-lock catch plate springs, 43-limit parts, 44-baffle plates, 45-first concave parts, 46-second concave parts, 47-first clamping tongues, 48-second clamping tongues and 49-unlocking parts;

50-operating key assembly, 51-operating key, 52-pivot part, 53-connecting arm.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 11, a combination switch according to a preferred embodiment of the present invention is used for being mounted on a small household appliance, and the combination switch includes a base 10, a rear cover 20 connected to one side of the base 10, a switching assembly 30 and a latch assembly 40 mounted between the base 10 and the rear cover 20, and an operation key assembly 50 pivotally connected to one side of the base 10 opposite to the rear cover 20; the operating key assembly 50 is inserted through the base 10 and then pivotally connected to the switching assembly 30.

The one end of base 10 evenly interval protruding is equipped with a plurality of latches 11, and the one side of base 10 towards back lid 20 is equipped with the chamber of holding, and the one side that corresponds the chamber inside of holding on the base 10 is equipped with first slot 12 and second slot 13, and first slot 12 is used for holding switching component 30, and second slot 13 is used for holding latch component 40. Further, a blocking portion 14 is further protruding in the base 10 corresponding to the second slot 13, and the blocking portion 14 is used for abutting against the latch assembly 40. A plurality of through holes 15 are uniformly and alternately arranged on the base 10 corresponding to the accommodating cavity, and a first rotating shaft seat 16 is respectively and convexly arranged on two opposite sides of one end of the base 10 corresponding to each through hole 15.

Still further, in this embodiment, one end of the base 10 facing the operation key assembly 50 corresponding to each through hole 15 is respectively provided with a positioning column 17 in a protruding manner, and each positioning column 17 is respectively used for sleeving a return spring 18; one end of the return spring 18 abuts the base 10, and the other end abuts the operation key assembly 50.

One end of the rear cover 20 is uniformly connected with a plurality of buckling parts 21 at intervals, and the buckling parts 21 are in one-to-one correspondence with the clamping teeth 11 so as to realize the mutual buckling of the rear cover 20 and the base 10. A plurality of second rotating shaft seats 22 are uniformly and convexly arranged on one surface of the rear cover 20 facing the base 10 at intervals, and the second rotating shaft seats 22 are in one-to-one correspondence with the first rotating shaft seats 16. Further, in the present embodiment, a plurality of reinforcing blocks 23 are further protruding from a surface of the rear cover 20 facing the base 10, and the reinforcing blocks 23 are correspondingly received in the first slots 12 for limiting the switching assembly 30 in the first slots 12.

The switching assembly 30 includes a conductive sheet 31 and an electrode sheet 32 arranged at intervals, a plurality of movable contact sheets 33 movably mounted on the electrode sheet 32, and a transmission member 34 respectively abutting against each movable contact sheet 33; the movable contact piece 33 is used for movably abutting against the conductive piece 31 so as to realize electrical communication between the electrode piece 32 and the conductive piece 31. In the present embodiment, the conductive sheet 31 and the electrode sheet 32 are both accommodated in the first slot 12; the electrode sheet 32 includes a first electrode sheet 321 and a second electrode sheet 322 arranged at intervals, and a current limiting element 323 connected between the first electrode sheet 321 and the second electrode sheet 322; the first electrode tab 321 is in electrical communication with the second electrode tab 322. In this embodiment, the current limiting element 323 is a diode; in other embodiments, the current limiting element 323 may also be a resistor.

In the present embodiment, the number of movable contacts 33 is three. The movable contact 33 includes a first movable contact 331 movably mounted on the first electrode plate 321, and a second movable contact 332 and a third movable contact 333 movably mounted on the second electrode plate 322.

In this embodiment, each transmission member 34 corresponds to each through hole 14 one by one, and the operation key assembly 50 is connected to the transmission member 34 after penetrating through the through hole 14. Further, in the present embodiment, the number of the transmission members 34 is three; the transmission member 34 includes a transmission rod, and a compression spring and a slide cylinder movably mounted in one end of the transmission rod. A column hole is formed in one end of the transmission rod, the pressure spring and the sliding cylinder are accommodated in the column hole, one end of the pressure spring is abutted to the bottom of the column hole, and the other end of the pressure spring is abutted to the sliding cylinder; under the elastic action of the pressure spring, the sliding cylinder protrudes out of the end part of the transmission rod and then abuts against the movable contact piece 33, so as to drive the movable contact piece 33 to deflect. Specifically, the transmission member 34 includes a first transmission member 35 for abutting the first movable contact 331, a second transmission member 36 for abutting the second movable contact 332, and a third transmission member 37 for abutting the third movable contact 333; the first transmission member 35 and the second transmission member 36 are both located on the same side of the third transmission member 37.

In the present embodiment, the first transmission member 35 corresponds to a low power function gear, the second transmission member 36 corresponds to a high power function gear, and the third transmission member 37 corresponds to a closing and clicking function gear.

The opposite sides of the middle part of the first transmission member 35 are respectively provided with a first rotating shaft 350 in a protruding way, the opposite sides of the middle part of the second transmission member 36 are respectively provided with a second rotating shaft 360 in a protruding way, and the opposite sides of the middle part of the third transmission member 37 are respectively provided with a third rotating shaft 370 in a protruding way; the first rotating shaft 350, the second rotating shaft 360 and the third rotating shaft 370 are respectively accommodated between the corresponding first rotating shaft seat 16 and the second rotating shaft seat 22.

Further, a first hook portion 351 is protruding on one side of the first transmission member 35, and the first hook portion 351 is used for fastening the latch assembly 40. A second hook portion 361 is protruding on one side of the second transmission member 36, and the second hook portion 361 is used for fastening the latch assembly 40. One side of the third transmission member 37 is convexly provided with a pushing part 371, and the pushing part 371 is used for driving the locking assembly 40 to move.

The latch assembly 40 comprises a latch plate 41, a latch plate spring 42 arranged at one end of the latch plate 41, a limit part 43 connected to the other end of the latch plate 41, and a baffle 44 positioned at one side surface of the latch plate 41; one side of the blocking piece 44 abuts against the limiting portion 43. The latch plate 41 is sandwiched between the base 10 and the transmission member 34, and one end of the latch plate spring 42 abuts against the latch plate 41 and the other end abuts against the blocking portion 14. The end of the latch plate 41 remote from the latch plate spring 42 is provided with a first recess 45 and a second recess 46, the first recess 45 being adapted to receive the first transmission member 35 and the second recess 46 being adapted to receive the second transmission member 36.

Further, a first latch 47 is convexly arranged on one side of the locking plate 41 corresponding to the first recess 45, the first latch 47 is positioned in the first recess 45, and the first latch 47 corresponds to the first hook 351; the width of the first latch 47 gradually decreases from the third transmission member 37 toward the first transmission member 35, so that the latch plate 41 can be driven to move toward the blocking portion 14 when the first hook portion 351 presses the first latch 47.

Further, a second latch 48 is protruding from the latch plate 41 corresponding to one side in the second recess 46, the second latch 48 is located in the second recess 46, and the second latch 48 corresponds to the second hook 361; the width of the second latch 48 gradually decreases from the third transmission member 37 toward the second transmission member 36, so that the latch plate 41 can be driven to move toward the blocking portion 14 when the second latch portion 361 presses the second latch 48. An unlocking part 49 is further arranged on one end, far away from the first clamping tongue 47 and the second clamping tongue 48, of the locking plate 41 in a protruding mode, and the unlocking part 49 corresponds to the pushing part 371.

The blocking piece 44 is located between the first recess 45 and the second recess 46, that is, the blocking piece 44 is located between the first transmission piece 35 and the second transmission piece 36, when the first transmission piece 35 enters the first recess 45, the first transmission piece 35 drives the blocking piece 44 to move towards the second recess 46 and block the second recess 46, so that the second transmission piece 36 cannot enter the second recess 46 while the first transmission piece 35 enters the first recess 45, and vice versa, and only one transmission piece 34 can be pressed at the same time.

The key assembly 50 includes three keys 51 arranged side by side, one end of each key 51 is provided with a pivot portion 52, and the pivot portion 52 is correspondingly pivoted on the base 10; the other end of each operating key 51 is provided with two connecting arms 53, and the two connecting arms 53 penetrate through the through holes 15 and then pivot the end, away from the movable contact piece 33, of the transmission piece 34. A fixing seat (not shown) is further protruding between the two connecting arms 53 corresponding to the operating key 51, the fixing seat corresponds to the positioning column 17, one end of the return spring 18 is sleeved with the positioning column 17, and the other end of the return spring is abutted to the fixing seat, so that the operating key 51 has a return function, and the driving part 34 can be driven to return.

In the stationary state of the small household appliance, if the operation key 51 corresponding to the first transmission member 35 is pressed, the first transmission member 35 deflects, the first hook portion 351 presses the first clamping tongue 47, the locking plate 41 is driven to move towards the blocking portion 14, the locking plate spring 42 is compressed, then the first transmission member 35 enters the first recess 45, the first hook portion 351 and the first clamping tongue 47 are dislocated, the locking plate 41 loses the pushing force of the first transmission member 35, the locking plate 41 is reset under the action of the locking plate spring 42, the first hook portion 351 is buckled and locked with the first clamping tongue 47, so that the first movable contact 331 and the conductive plate 31 are kept in an abutting state, the conductive plate 31 and the electrode plate 32 are electrically communicated, and the small household appliance is powered and in a low-power running state; at the same time, the first transmission member 35 further presses the blocking piece 44 to move towards the second recess 46, and the blocking piece 44 blocks the second recess 46 to prevent the second transmission member 36 from entering the second recess 46, so that the first transmission member 35 and the second transmission member 36 are prevented from being pressed simultaneously. In this case, the corresponding operation key 51 of the first transmission member 35 swings with the first transmission member 35, and the return spring 18 is compressed.

Similarly, when the small household electrical appliance is in the stationary state, if the operation key 51 corresponding to the second transmission member 36 is pressed, the second transmission member 36 swings, the second hook portion 361 is buckled and locked with the second latch 48, and the small household electrical appliance is powered on and is in the high-power operation state; at the same time, the second transmission member 36 drives the blocking piece 44 to block the first recess 45, so as to prevent the first transmission member 35 from entering the first recess 45, and avoid the first transmission member 35 and the second transmission member 36 from being pressed simultaneously. In this case, the corresponding operating key 51 of the second transmission member 36 swings with the second transmission member 36, and the return spring 18 is compressed.

The low-power operation state is switched to the high-power operation state, namely when the operation key 51 corresponding to the first transmission member 35 is pressed, and the operation key 52 corresponding to the second transmission member 36 is selectively pressed, the second transmission member 36 deflects, the second clamping hook portion 361 extrudes the second clamping tongue 48 to drive the locking plate 41 to move towards the blocking portion 14, the locking plate spring 42 is compressed, the first clamping hook portion 351 is separated from the first clamping tongue 47, and the operation key 51 corresponding to the first transmission member 35 is reset due to the fact that no external force supports the operation key 51 corresponding to the first transmission member 35, so that the operation key 51 corresponding to the first transmission member 35 is reset, and the first transmission member 35 is driven to leave the first recess 45, so that a moving space is provided for the blocking piece 44; meanwhile, the second transmission piece 36 continues to move and enters the second concave 46, the second clamping hook part 361 and the second clamping tongue 48 are dislocated, the locking plate 41 loses the pushing force of the second transmission piece 36, the locking plate 41 is reset under the action of the locking plate spring, the second clamping hook part 361 and the second clamping tongue are buckled and locked, so that the second movable contact piece 332 and the conducting piece 31 are kept in an abutting state, and the small household appliance is powered in a high-power running state; at the same time, the second transmission member 36 drives the blocking piece 44 to block the first recess 45, the operation key 51 corresponding to the second transmission member 36 swings along with the second transmission member 36, and the return spring 18 is compressed. Similarly, the high power operating state is switched to the low power operating state, which is the same principle of motion.

When the small household appliance needs to be closed, the operating key 51 corresponding to the third transmission member 37 is touched, the third transmission member 37 deflects, the pushing portion 371 extrudes the unlocking portion 49, the locking plate 41 is driven to move towards the blocking portion 14, the first clamping hook portion 351 is separated from the first clamping tongue 47 or the second clamping hook portion 361 is separated from the second clamping tongue 48, accordingly, the first transmission member 35 or the second transmission member 36 is released, the passage between the conductive sheet 31 and the electrode sheet 32 is disconnected, and the small household appliance is powered off and closed.

Still further, if the small household appliance needs to perform the inching function, the operating key 51 corresponding to the third transmission member 37 is pressed for a long time, and the third transmission member 37 is deflected, so that the third movable contact 333 and the conductive sheet 31 keep an abutting state, the conductive sheet 31 and the electrode sheet are electrically communicated, and the small household appliance is electrically operated; and the corresponding operation key 51 of the third transmission piece 37 is loosened, the third transmission piece 37 is reset, and the small household appliance is powered off and closed. Therefore, by pressing the duration of the operation key 51 corresponding to the third transmission member 37, the working duration of the small household appliance can be controlled according to the user requirement, and the use experience is improved.

The combined switch is simple and reasonable in structure and convenient to use, any one of the first transmission piece 35, the second transmission piece 36 and the third transmission piece 37 is optionally triggered to realize corresponding functions through matching of the locking plate 41 and the blocking piece 44, meanwhile, the brake can be carried out through the third transmission piece 37, the functions are powerful, and different functions can be realized.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A combination switch, comprising:

the base is convexly provided with a blocking part;

2. The combination switch of claim 1, wherein the latch plate has a first recess and a second recess spaced apart from one end of the latch plate spring; the first recess is used for accommodating the first transmission piece, and the second recess is used for accommodating the second transmission piece; the first clamping tongue is connected in the first concave, and the second clamping tongue is connected in the second concave.

3. The combination switch of claim 1, wherein a first hook portion is protruding from one side of the first transmission member, and the first hook portion corresponds to the first latch; a second clamping hook part is convexly arranged on one side of the second transmission piece, and the second clamping hook part corresponds to the second clamping tongue; one side of the third transmission piece is convexly provided with a pushing part, and the pushing part corresponds to the unlocking part.

4. The combination switch of claim 1, wherein the electrode pads comprise first and second electrode pads disposed at intervals, and a current limiting element connected between the first and second electrode pads; the movable contact piece comprises a first movable contact piece which is interactively arranged on the first electrode piece, and a second movable contact piece and a third movable contact piece which are movably arranged on the second electrode piece; the first movable contact piece is abutted against the first transmission piece, the second movable contact piece is abutted against the second transmission piece, and the third movable contact piece is abutted against the third transmission piece.

5. The combination switch of claim 1, wherein the transmission member comprises a transmission rod, and a compression spring and a sliding cylinder movably mounted in one end of the transmission rod; a column hole is formed in one end of the transmission rod, and the column hole accommodates the pressure spring and the sliding cylinder; one end of the pressure spring is abutted against the bottom of the column hole, and the other end of the pressure spring is abutted against the sliding cylinder; the sliding cylinder protrudes beyond the end part of the transmission rod and then abuts against the movable contact piece.

6. The combination switch according to claim 1, wherein the first transmission member is provided with first rotating shafts respectively protruding from opposite sides of a middle portion of the first transmission member, the second transmission member is provided with second rotating shafts respectively protruding from opposite sides of a middle portion of the second transmission member, and the third transmission member is provided with third rotating shafts respectively protruding from opposite sides of a middle portion of the third transmission member; the first rotating shaft, the second rotating shaft and the third rotating shaft are all pivoted on the base.

7. The combination switch of claim 1, wherein a receiving cavity is formed in one surface of the base, and a plurality of through holes are uniformly formed in the base corresponding to the receiving cavities at intervals, and the through holes are in one-to-one correspondence with the transmission members.

8. The combination switch of claim 7, further comprising an operator key assembly comprising three operator keys arranged side-by-side; one end of each operating key is provided with a pivot part, and the pivot parts are correspondingly pivoted on the base; the other end of each operating key is provided with two connecting arms, and the two connecting arms penetrate through the through holes and are pivoted with one end, far away from the movable contact piece, of the transmission piece.

9. The combination switch of claim 8, wherein a positioning post is respectively protruded at one end of the base facing each through hole, and each positioning post is used for sleeving a return spring; a fixed seat is also convexly arranged between the two corresponding connecting arms on the operating key, and the fixed seat corresponds to the positioning column; one end of the reset spring is sleeved with the positioning column, and the other end of the reset spring is abutted against the fixing seat.

10. The combination switch of claim 1, further comprising a rear cover attached to one side of the base; the base is characterized in that a plurality of clamping teeth are convexly arranged at one end of the base at uniform intervals, a plurality of buckling parts are connected at one end of the rear cover at uniform intervals, and the buckling parts correspond to the clamping teeth one by one.