Novel overload protection switch

Abstract

The utility model relates to a novel overload protection switch, which comprises a shell, a connecting assembly, an overload assembly, a lifting assembly and a switch assembly, and is characterized in that the connecting assembly comprises a live wire pin and a first null line pin, and the live wire pin and the first null line pin are fixedly arranged on the shell; the overload assembly comprises a thermal bimetallic strip, one end of the thermal bimetallic strip is electrically connected with the live wire pin, and when the first null line pin is electrically connected with the live wire pin, the other end of the thermal bimetallic strip abuts against and is electrically connected with the first null line pin; the lifting assembly comprises a lifting block and a lifting piece, the lifting block is rotationally arranged in the shell, the lifting block comprises an open circuit part and a closed circuit part, the open circuit part is fixedly connected with the closed circuit part, the closed circuit part is provided with a connecting hole, one end of the lifting piece penetrates through the connecting hole, and the other end of the lifting piece is clamped and matched with the thermal bimetallic strip; the switch assembly is arranged on the shell and used for driving the lifting block to rotate. The thermal bimetallic strip has the advantage that the problem that the thermal bimetallic strip needs larger deformation to realize the open circuit of the switch along with the use of the switch is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of switches, in particular to a novel overload protection switch. BACKGROUND

[0002] With the continuous improvement of people's living standards, various household appliances have entered thousands of households, and with them, the occurrence of safety accidents such as fires caused by improper use of household appliances or quality problems of household appliances causing circuit overload or short circuit. The research and development of power safety products such as overload protection switches have received widespread attention.

[0003] The existing overload protection switch generally includes a shell, a connecting assembly, a thermal bimetallic sheet, and a lifting plate. The connecting assembly includes a neutral line pin and a live line pin, both of which are fixedly arranged in the shell. One end of the thermal bimetallic sheet is fixedly and electrically connected with the live line pin. The switch assembly includes a button and a lifting plate. The button is rotationally connected to the shell, one end of the lifting plate is connected to the button, and the other end of the lifting plate is connected to the other end of the thermal bimetallic spring. When the switch is off, the button is rotated in one direction, and the lifting plate lifts the thermal bimetallic sheet. When the switch is on, the button is rotated in the other direction, thereby driving the lifting plate to press down the thermal bimetallic sheet. When the switch is overloaded, the excessive current causes the thermal bimetallic sheet to heat, expand, and deform, and then pop up and push the button to rotate in one direction, thereby causing the switch to be off.

[0004] According to the related technology in the above, when the switch is overloaded, the thermal bimetallic sheet needs to heat, expand, and deform to a certain extent to have enough elastic force to push the button to rotate, thereby realizing the off of the switch. With the use of the switch, dust and other impurities are easily accumulated between the button and the shell, thereby increasing the frictional resistance between the button and the shell, and further causing the thermal bimetallic sheet to need greater deformation to push the button to rotate. Greater deformation of the thermal bimetallic sheet requires a higher overload temperature, thereby causing the overload temperature of the thermal bimetallic sheet to exceed the safe range, and further causing the shell to be damaged due to the excessively high overload temperature of the thermal bimetallic sheet. SUMMARY

[0005] In order to prevent the switch from easily causing the thermal bimetallic sheet to need greater deformation to realize the off of the switch with use, the present application provides a novel overload protection switch.

[0006] The novel overload protection switch provided by the present application adopts the following technical solution:

[0007] A novel overload protection switch includes a shell, a connecting assembly, an overload assembly, a lifting assembly, and a switch assembly. The connecting assembly includes a live line pin and a first neutral line pin, both of which are fixedly arranged in the shell.

[0008] The overload assembly comprises a thermal bimetallic strip, one end of the thermal bimetallic strip is electrically connected with the live pin, when the first neutral pin and the live pin are electrically connected, the other end of the thermal bimetallic strip abuts against and is electrically connected with the first neutral pin;

[0009] The pulling assembly comprises a pulling block and a pulling piece, the pulling block is rotationally arranged in the shell, the pulling block comprises a cut-off part and a passage part, the cut-off part and the passage part are fixedly connected, the passage part is provided with a connecting hole, one end of the pulling piece is arranged in the connecting hole, and the other end of the pulling piece is in clamping cooperation with the thermal bimetallic strip;

[0010] The switch assembly comprises a button, the button is in sliding cooperation with the shell, when the button is pressed, the button pushes the pulling block to rotate towards the one end of the button, until the pulling block rotates to a set position, and then the button is reset.

[0011] By adopting the above technical scheme, when the switch is switched from the cut-off state to the passage state, the button is pressed, the button pushes the passage part to rotate towards the first neutral pin, so that the passage part drives the pulling piece to move towards the first neutral pin, thereby pushing the thermal bimetallic strip to abut against the first neutral pin, so that the switch is switched from the cut-off state to the passage state, and then the button is reset;

[0012] When the switch is switched from the passage state to the cut-off state, the button is pressed, the button pushes the cut-off part to rotate towards the first neutral pin, so that the passage part drives the pulling piece to move away from the first neutral pin, thereby pulling the thermal bimetallic strip to separate from the abutment cooperation with the first neutral pin, so that the switch is switched from the passage state to the cut-off state, and then the button is reset;

[0013] When the switch is overloaded, the thermal bimetallic strip deforms due to overheating, so that the thermal bimetallic strip moves away from the first neutral pin, thereby pushing the passage part to rotate away from the first neutral pin through the pulling piece, until the passage part rotates to a set position, because the button is reset after completing the pushing of the pulling block, therefore, when the thermal bimetallic strip pushes the pulling block to rotate, the button is not easy to affect the rotation of the pulling block, and the pulling block is located in the shell, with the use of the switch, dust and other impurities are not easy to increase the friction resistance between the pulling block and the shell, thereby improving the problem that when the switch is overloaded, the thermal bimetallic strip needs to be heated and expanded to a certain degree to have enough elastic force to push the button to rotate, so as to realize the cut-off of the switch, with the use of the switch, dust and other impurities are easy to enter between the button and the shell, thereby increasing the friction resistance between the button and the shell, and further causing the thermal bimetallic strip to need greater deformation to push the button to rotate, and the greater deformation of the thermal bimetallic strip needs a higher overload temperature, thereby causing the overload temperature of the thermal bimetallic strip to exceed the safe range, and further causing the shell to be damaged due to the excessively high overload temperature of the thermal bimetallic strip.

[0014] Optionally, the switch assembly comprises a driving piece, the driving piece is arranged at one end of the button close to the shell and inside the shell, swing grooves are arranged at both sides of the button, the driving piece is arranged in the swing grooves, and the driving piece pushes the pull block to rotate when the button is pressed.

[0015] When one end of the cut-off part is close to the driving piece, the driving piece pushes the cut-off part to rotate, and when one end of the pass-through part is close to the driving piece, the driving piece pushes the pass-through part to rotate.

[0016] Optionally, the cut-off part is fixedly connected with a cut-off protrusion at one end away from the thermal bimetallic strip, and the pass-through part is fixedly connected with a pass-through protrusion at one end away from the thermal bimetallic strip.

[0017] Optionally, the switch assembly further comprises a horizontal spring, the horizontal spring is arranged between the driving piece and the button, one end of the horizontal spring is fixedly connected with the button, and the other end of the horizontal spring is fixedly connected with the driving piece, and the swing groove is provided with a horizontal plane.

[0018] By adopting the above technical scheme, when the driving piece is separated from the abutment between the pull block, the horizontal spring pushes the driving piece to be parallel to and abut against the horizontal plane on one side close to the horizontal plane, so that the driving piece is more easily abutted against one end of the pull block close to the driving piece and pushes the pull block to rotate the next time the button is pressed, and the usability is better.

[0019] Optionally, the switch assembly further comprises a plurality of reset springs, each reset spring is arranged between the button and the shell, one end of each reset spring is fixedly connected with the button, and the other end of each reset spring is fixedly connected with the shell.

[0020] Optionally, the switch assembly further comprises a light-emitting plate, the light-emitting plate is fixedly connected with the button, and the button is bright when the light-emitting plate emits light.

[0021] Optionally, the connection assembly further comprises a second zero line pin, the second zero line pin is fixedly arranged in the shell, and the number of reset springs comprises two;

[0022] One end of each reset spring is electrically connected with the light-emitting plate, the other end of one reset spring is electrically connected with the live wire pin, and the other end of the other reset spring is electrically connected with the second zero line pin.

[0023] Optionally, the overload assembly further comprises an electric contact and an electric column, the electric contact is fixedly and electrically connected with the thermal bimetallic strip, and the electric column is fixedly and electrically connected with the first zero line pin, the live wire pin and the first zero line pin are electrically connected when the electric contact and the electric column abut.

[0024] Optionally, the overload assembly further comprises an adjusting screw and an overload spring, the adjusting screw is threadedly connected to the shell, the overload spring is provided with a fixing slot at one end and an overload slot at the other end, the overload spring is located between the adjusting screw and the thermal bimetallic strip, the adjusting screw is inserted into and clamped in the fixing slot, and the thermal bimetallic strip is inserted into and clamped in the overload slot.

[0025] Optionally, the shell comprises a main shell part and a cover shell part, the main shell part is provided with a plurality of clamping grooves, and the cover shell part is fixedly provided with a plurality of clamping blocks, when each clamping block is inserted into and clamped in each clamping groove, the main shell part and the cover shell part are fixedly connected.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. When the switch is switched from the off state to the on state, the button is pressed, the button drives the on portion to rotate towards the first zero line pin, so that the on portion drives the pull tab to move towards the first zero line pin, thereby driving the thermal bimetallic strip to abut against the first zero line pin, so that the switch is switched from the off state to the on state, and then the button is reset.

[0028] When the switch is switched from the on state to the off state, the button is pressed, the button drives the off portion to rotate towards the first zero line pin, so that the on portion drives the pull tab to move away from the first zero line pin, thereby driving the thermal bimetallic strip to abut against the first zero line pin, so that the switch is switched from the on state to the off state, and then the button is reset.

[0029] When the switch is overloaded, the thermal bimetallic strip deforms due to overheating, so that the thermal bimetallic strip moves away from the first zero line pin, thereby driving the on portion to rotate away from the first zero line pin through the pull tab until the on portion rotates to a set position. After the button is reset after driving the pull block, the button does not easily affect the rotation of the pull block when the thermal bimetallic strip drives the pull block to rotate. The pull block is located inside the shell, and dust and other impurities are less likely to increase the frictional resistance between the pull block and the shell as the switch is used. This improves the problem that when the switch is overloaded, the thermal bimetallic strip needs to be deformed to a certain extent by heating and expansion, so as to have enough elastic force to drive the button to rotate, thereby achieving the off state of the switch. As the switch is used, dust and other impurities are likely to enter between the button and the shell, thereby increasing the frictional resistance between the button and the shell, and further causing the thermal bimetallic strip to need greater deformation to drive the button to rotate. Greater deformation of the thermal bimetallic strip requires a higher overload temperature, thereby causing the overload temperature of the thermal bimetallic strip to exceed the safe range, and further causing the shell to be damaged due to the excessively high overload temperature of the thermal bimetallic strip. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of an embodiment of the application;

[0031] Figure 2 is a schematic diagram of the explosion structure of an embodiment of the application;

[0032] Figure 3 is a schematic diagram of the explosion structure of an embodiment of the application;

[0033] Figure 4 is a schematic diagram of the connection assembly structure of an embodiment of the application;

[0034] Figure 5 is a schematic diagram of the overload assembly structure of an embodiment of the application;

[0035] Figure 6 is a schematic diagram of the explosion structure of an embodiment of the application;

[0036] Figure 7 is a schematic diagram of the abutment of the driving piece and the pulling piece Figure 1 ;

[0037] Figure 8 is a schematic diagram of the abutment of the driving piece and the pulling piece Figure 2 .

[0038] BRIEF DESCRIPTION OF DRAWINGS 1. housing; 11. main housing part; 111. overload cavity; 112. clamping groove; 12. cover housing part; 121. clamping block; 2. connection assembly; 21. live pin; 22. first neutral pin; 23. second neutral pin; 3. overload assembly; 31. thermal bimetallic strip; 32. electrical contact; 33. electrical contact column; 34. adjusting screw; 35. overload spring; 351. fixing groove; 352. overload groove; 4. pulling assembly; 41. pulling block; 411. breaking part; 4111. breaking protrusion; 412. passage part; 4121. passage protrusion; 4122. connecting hole; 42. pulling piece; 421. connecting piece; 422. connecting groove; 5. switch assembly; 51. button; 511. swing groove; 5111. horizontal plane; 52. light-emitting plate; 53. return spring; 54. driving piece; 55. horizontal spring. DETAILED DESCRIPTION

[0039] The application will be further described below in conjunction with the accompanying drawings. Figures 1-8 The application will be further described below in conjunction with the accompanying drawings.

[0040] The application discloses a novel overload protection switch. Referring to Figure 1 and Figure 2 A novel overload protection switch includes a housing 1, a connection assembly 2, an overload assembly 3, a pulling assembly 4, and a switch assembly 5, the connection assembly 2, the overload assembly 3, the pulling assembly 4, and the switch assembly 5 are all arranged in the housing 1.

[0041] With reference to Figure 3 The shell 1 comprises a main shell part 11 and a cover shell part 12, the main shell part 11 is provided with an overload cavity 111 on the side close to the cover shell part 12, the main shell part 11 is provided with a plurality of clamping grooves 112, the cover shell part 12 is fixedly provided with a plurality of clamping blocks 121, each clamping block 121 is clamped and fixed in each clamping groove 112, the main shell part 11 and the cover shell part 12 are fixedly connected, and the cover shell part 12 seals the overload cavity 111.

[0042] With reference to Figure 4 and Figure 5 The connecting assembly 2 comprises a live wire pin 21, a first zero line pin 22 and a second zero line pin 23, the live wire pin 21 is clamped and fixed to the main shell part 11 and one end is located in the overload cavity 111, the live wire pin 21 is used for electrical connection with the live wire, the first zero line pin 22 is clamped and fixed to the main shell part 11 and one end is located in the overload cavity 111, the first zero line pin 22 is used for electrical connection with the zero line, the length direction of the live wire pin 21 is towards one side of the thickness direction of the main shell part 11, the length direction of the first zero line pin 22 is towards the other side of the thickness direction of the main body part, and the second zero line pin 23 is clamped and fixed to the side of the main body part.

[0043] With reference to Figure 4 and Figure 5 The overload assembly 3 comprises a thermal bimetallic strip 31, an electrical contact 32 and an electrical column 33, the thermal bimetallic strip 31 has elasticity and thermal deformation ability in the embodiment of the application, the thermal bimetallic strip 31 is located in the overload cavity 111, one end of the thermal bimetallic strip 31 is clamped and fixed to the main shell 1 and is electrically connected with the live wire pin 21, the other end of the thermal bimetallic strip 31 is fixed and electrically connected with the electrical contact 32, the electrical column 33 is fixed and electrically connected with the first zero line pin 22, when the electrical contact 32 and the electrical column 33 are in abutting cooperation, the thermal bimetallic strip 31 is electrically connected with the first zero line pin 22, so that the live wire pin 21 and the first zero line pin 22 are electrically connected, so that the switch is in the on state, when the electrical contact 32 and the electrical column 33 are separated from the abutting cooperation, the thermal bimetallic strip 31 is separated from the electrical connection with the first zero line pin 22, so that the live wire pin 21 is separated from the electrical connection with the first zero line pin 22, so that the switch is switched from the on state to the off state.

[0044] With reference to Figure 4 and Figure 5, the overload assembly 3 further comprises an adjusting screw 34 and an overload spring 35, the adjusting screw 34 is threadedly connected to the main shell 11 and one end of the adjusting screw 34 is located in the overload cavity 111, the overload spring 35 is in a U shape and has elasticity, the overload spring 35 is located in the overload cavity 111, one end of the overload spring 35 is provided with a fixed groove 351, the other end of the overload spring 35 is provided with an overload groove 352 which is arranged in a penetrating manner, the overload spring 35 is located between the adjusting screw 34 and the thermal bimetallic strip 31, the adjusting screw 34 is arranged in and clamped in the fixed groove 351, so that the adjusting screw 34 is clamped with the overload spring 35, one end of the thermal bimetallic strip 31 away from the hot wire pin 21 is arranged in and clamped in the overload groove 352, so that the thermal bimetallic strip 31 is clamped with the overload spring 35.

[0045] When the switch overload thermal bimetallic strip 31 is overheated and deformed, the current of the overload makes the thermal bimetallic strip 31 heat and expand and deform, so that the thermal bimetallic strip 31 has a tendency to tilt away from the first zero line pin 22, wherein the end of the thermal bimetallic strip 31 close to the overload spring 35 has the largest deformation, and the thermal bimetallic strip 31 tilts away from the first zero line pin 22, and the end of the overload spring 35 is moved away from the first zero line pin 22, when the thermal bimetallic strip 31 is basically in a horizontal state, the end of the overload spring 35 close to the thermal bimetallic strip 31 is moved to the overload spring 35, so that the direction of the elastic force of the overload spring 35 is changed to the direction away from the first zero line pin 22, so that the overload spring 35 tilts the thermal bimetallic strip 31, so that the power contact and the power column 33 are separated to form a circuit break, and the overload protection is achieved.

[0046] By moving the adjusting screw 34 close to or away from the overload cavity 111, the height of the overload spring 35 is controlled, so that the specifications of the product are finely adjusted, when the adjusting screw 34 moves close to the overload cavity 111, the time of the thermal bimetallic strip 31 breaking when overloaded is lengthened, and when the adjusting screw 34 moves away from the overload cavity 111, the time of the thermal bimetallic strip 31 breaking when overloaded is shortened.

[0047] Referring to Figure 4 and Figure 5 , the pulling assembly 4 comprises a pulling block 41, the pulling block 41 is in a rectangular shape, the pulling block 41 is rotationally arranged in the overload cavity 111, the pulling block 41 comprises a break part 411 and a passage part 412, the break part 411 and the passage part 412 are fixedly connected, the break part 411 and the passage part 412 are respectively located at two ends of the length direction of the pulling block 41, the break part 411 is fixedly connected with a break protrusion 4111 at an end away from the thermal bimetallic strip 31, the passage part 412 is fixedly connected with a passage protrusion 4121 at an end away from the thermal bimetallic strip 31, and the passage part 412 is provided with a connecting hole 4122.

[0048] Referring toFigure 4 and Figure 5 The pulling assembly 4 further comprises a pulling piece 42, one end of the pulling piece 42 is fixedly provided with a connecting piece 421, and the other end of the pulling piece 42 is provided with a connecting groove 422 penetratingly arranged, when the pulling piece 42 is arranged between the pulling block 41 and the thermal bimetallic strip 31, the connecting piece 421 is arranged in the connecting hole 4122, and the thermal bimetallic strip 31 is arranged in the connecting groove 422 and is in clamping connection with the pulling piece 42.

[0049] When the switch is in the on state, one end of the on portion 412 of the pulling block 41 is close to the first zero line pin 22, and one end of the off portion 411 of the pulling block 41 is away from the first zero line pin 22, when the switch is switched from the on state to the off state, the pulling block 41 is rotated, one end of the off portion 411 of the pulling block 41 is rotated towards the first zero line pin 22, and one end of the on portion 412 of the pulling block 41 is rotated away from the first zero line pin 22, so as to drive the pulling piece 42 to move away from the first zero line pin 22, so as to pull the thermal bimetallic strip 31 away from the first zero line pin 22, so as to make the electric contact 32 disengage from the abutting connection with the electric column 33, so as to disconnect the electric connection between the fire line pin 21 and the first zero line pin 22, and so as to switch the switch to the off state.

[0050] Referring to Figure 6 The switch assembly 5 comprises a button 51, a light-emitting plate 52 and two reset springs 53, the button 51 is in sliding connection with one end of the shell 1, the light-emitting plate 52 is fixedly connected with the button 51 close to one end of the shell 1, and the two reset springs 53 are both arranged between the button 51 and the shell 1, one end of each of the two reset springs 53 is fixedly and electrically connected with the button 51, the other end of each of the two reset springs 53 is fixedly connected with the shell 1, and the other end of one reset spring 53 is electrically connected with the fire line pin 21, and the other end of the other reset spring 53 is electrically connected with the second zero line pin 23, so that when the switch is powered on, the light-emitting plate 52 is always in the always-on state, so that the button 51 is always kept on, and so that it is easier to find the position of the button 51.

[0051] Referring to Figure 6The switch assembly 5 further comprises a driving piece 54 and a horizontal spring 55. The driving piece 54 is arranged at one end of the button 51 close to the shell 1 and inside the shell 1. Swing grooves 511 are arranged at both sides of the button 51. The driving piece 54 is arranged in the swing grooves 511. The swing grooves 511 are provided with horizontal planes 5111. The horizontal spring 55 is arranged between the driving piece 54 and the button 51. One end of the horizontal spring 55 is fixedly connected with the button 51. The other end of the horizontal spring 55 is fixedly connected with the driving piece 54. Thus, when the driving piece 54 is in a normal state, the horizontal spring 55 pushes the driving piece 54 to be parallel to and abut against the horizontal plane 5111. Thus, when the button 51 is pressed next time, the driving piece 54 is more likely to abut against one end of the pull block 41 close to the driving piece 54 and push the pull block 41 to rotate.

[0052] The implementation principle of the novel overload protection switch is as follows: Figure 7 and Figure 8 When the switch needs to be switched from the on state to the off state, the button 51 is pressed to drive the driving piece 54 to move towards the pull block 41. When the driving piece 54 abuts against the off protrusion 4111, the one end of the driving piece 54 swings along the swing groove 511 towards the button 51, and the other end of the driving piece 54 swings along the swing groove 511 away from the button 51. Thus, the driving piece 54 is switched from the horizontal state to the inclined state.

[0053] At this time, the angle between the one end of the driving piece 54 close to the pull block 41 and the horizontal line is set as A. The angle between the straight line connecting the abutting point between the off protrusion 4111 and the driving piece 54 and the rotating point of the pull block 41 and the horizontal line is set as B. At this time, the angle B is greater than the angle A.

[0054] With the driving piece 54 pushing the pull block 41 to rotate, the angle B gradually decreases until it is close to or equal to the angle A. At this time, the pull block 41 is rotated to the limit position. The arrangement of the off protrusion 4111 or the on protrusion 4121 increases the angle of the angle B, that is, increases the angle between the straight line connecting the abutting point between the driving piece 54 and the pull block 41 and the rotating point of the pull block 41 and the horizontal line. Thus, the rotating angle of the pull block 41 is increased when the driving piece 54 has the same driving distance. The arrangement of the swing groove 511 makes the one end of the pull block 41 rotate towards the first zero line pin 22 and the other end of the pull block 41 rotate towards the driving piece 54. Because the driving piece 54 is inclined, the distance between the other end of the driving piece 54 and the other end of the pull block 41 is increased. Thus, the other end of the driving piece 54 is not easy to abut against the other end of the pull block 41. Thus, the pushing distance of the pull block 41 is increased. Thus, the rotating angle of the pull block 41 is increased.

[0055] The problem that the pull block 41 is not easy to be pushed to the required position when the pull block 41 is rotated by pushing the button 51 is solved by the cooperation between the swing groove 511 and the disconnecting block 4111 / through block 4121. When the driving piece 54 finishes pushing the pull block 41, the pull block 41 is not easy to be interfered by the driving piece 54 when the pull block 41 is rotated due to the switch overload, the button 51 drives the driving piece 54 to reset, the problem that the hot bimetallic strip 31 needs to be heated and deformed to a certain extent to have enough elastic force to push the button 51 to rotate to realize the disconnection of the switch is improved. With the use of the switch, dust and other sundries are easy to enter between the button 51 and the shell 1, thereby increasing the friction resistance between the button 51 and the shell 1, and further causing the hot bimetallic strip 31 to need greater deformation to push the button 51 to rotate, and the greater deformation of the hot bimetallic strip 31 needs higher overload temperature, thereby causing the overload temperature of the hot bimetallic strip 31 to exceed the safe range, and further causing the shell 1 to be damaged due to the excessively high overload temperature of the hot bimetallic strip 31.

[0056] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A novel overload protection switch characterized by: The utility model provides a kind of switch, including shell (1), connecting assembly (2), overload assembly (3), pull assembly (4) and switch assembly (5), the connecting assembly (2) includes fire pin (21) and first zero pin (22), and fire pin (21) and first zero pin (22) are fixedly arranged in shell (1); The overload assembly (3) includes a thermal bimetallic strip (31), one end of the thermal bimetallic strip (31) is electrically connected with the fire pin (21), and when the first zero pin (22) and the fire pin (21) are electrically connected, the other end of the thermal bimetallic strip (31) abuts against and is electrically connected with the first zero pin (22); The pull assembly (4) includes a pull block (41) and a pull piece (42), the pull block (41) is rotatably arranged inside the shell (1), the pull block (41) includes a breaking circuit part (411) and a passage part (412), the breaking circuit part (411) and the passage part (412) are fixedly connected, the passage part (412) is provided with a connecting hole (4122), one end of the pull piece (42) is arranged in the connecting hole (4122), and the other end of the pull piece (42) is connected with the thermal bimetallic strip (31) in a clamping manner. The switch assembly (5) includes a button (51), the button (51) is slidably arranged in the shell (1), when the button (51) is pressed, the button (51) pushes the pull block (41) to rotate towards one end of the button (51), until the pull block (41) rotates to a set position, and the button (51) is reset.

2. A new overload protection switch according to claim 1, characterized in that: The switch assembly (5) includes a driving piece (54), the driving piece (54) is arranged at one end of the button (51) close to the shell (1) and inside the shell (1), both sides of the button (51) are provided with swing grooves (511) arranged therethrough, both sides of the driving piece (54) are arranged in the two swing grooves (511), when the button (51) is pressed, the driving piece (54) pushes the pull block (41) to rotate; When one end of the breaking circuit part (411) is close to the driving piece (54), the driving piece (54) pushes the breaking circuit part (411) to rotate, and when one end of the passage part (412) is close to the driving piece (54), the driving piece (54) pushes the passage part (412) to rotate.

3. A new overload protection switch according to claim 2, characterized in that: One end of the breaking circuit part (411) away from the thermal bimetallic strip (31) is fixedly connected with a breaking circuit protrusion (4111), and one end of the passage part (412) away from the thermal bimetallic strip (31) is fixedly connected with a passage protrusion (4121).

4. A new type of overload protection switch according to claim 2, characterized in that: The switch assembly (5) further includes a horizontal spring (55), the horizontal spring (55) is located between the driving piece (54) and the button (51), one end of the horizontal spring (55) is fixedly connected with the button (51), the other end of the horizontal spring (55) is fixedly connected with the driving piece (54), and the swing groove (511) is provided with a horizontal surface (5111).

5. A new type of overload protection switch according to claim 2, characterized in that: The switch assembly (5) further comprises a plurality of reset springs (53), each of the reset springs (53) is located between the button (51) and the shell (1), one end of each of the reset springs (53) is fixedly connected with the button (51), and the other end of each of the reset springs (53) is fixedly connected with the shell (1).

6. A new type of overload protection switch according to claim 5, characterized in that: The switch assembly (5) further comprises a light-emitting plate (52), the light-emitting plate (52) is fixedly connected with the button (51), and the button (51) is bright when the light-emitting plate (52) emits light.

7. A new overload protection switch according to claim 6, characterized in that: The connection assembly (2) further comprises a second zero line pin (23), the second zero line pin (23) is fixedly arranged on the shell (1), and the number of the reset springs (53) includes two; One end of each of the two reset springs (53) is electrically connected with the light-emitting plate (52), one end of one of the reset springs (53) is electrically connected with the live pin (21), and the other end of the other reset spring (53) is electrically connected with the second zero line pin (23).

8. A new type of overload protection switch according to claim 1, characterized in that: The overload assembly (3) further comprises an electric contact (32) and an electric column (33), the electric contact (32) is fixedly and electrically connected with the thermal bimetallic strip (31), and the electric column (33) is fixedly and electrically connected with the first zero line pin (22), the electric contact (32) and the electric column (33) are in abutment, and the live pin (21) and the first zero line pin (22) are electrically connected.

9. A new type of overload protection switch according to claim 8, characterized in that: The overload assembly (3) further comprises an adjusting screw (34) and an overload spring (35), the adjusting screw (34) is threadedly connected with the shell (1), one end of the overload spring (35) is provided with a fixing groove (351), the other end of the overload spring (35) is provided with an overload groove (352) penetratingly arranged, the overload spring (35) is located between the adjusting screw (34) and the thermal bimetallic strip (31), the adjusting screw (34) is penetratingly and clampingly matched with the fixing groove (351), and the thermal bimetallic strip (31) is penetratingly and clampingly matched with the overload groove (352).

10. A new type of overload protection switch according to claim 1, characterized in that: The shell (1) comprises a main shell part (11) and a cover shell part (12), the main shell part (11) is provided with a plurality of clamping grooves (112), and the cover shell part (12) is fixedly provided with a plurality of clamping blocks (121), when each of the clamping blocks (121) is penetratingly and clampingly fixed in each of the clamping grooves (112), the main shell part (11) and the cover shell part (12) are fixedly connected.

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