Overload protection switch

Abstract

The invention relates to an overload protection switch, which comprises a shell, a connecting assembly, an overload 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 switch assembly comprises a button and a lifting piece, the button is in sliding fit with the shell, the lifting piece comprises a main body part, a crimping part and a lifting part, the main body part is rotationally connected to the shell, a lifting groove is formed in the main body part, the thermal bimetallic strip penetrates through the lifting groove, the crimping part is fixedly connected to one side of the main body part, and the lifting part is fixedly connected to one end of the main body part. The overload switch has the advantages that the overload switch is sufficiently sensitive to the overload of the switch, and the phenomenon that the thermal bimetallic strip needs larger deformation to realize the disconnection of the switch along with use is avoided.

Description

Technical Field

[0001] The present application relates to the field of switches, and in particular to an overload protection switch. Background Art

[0002] As people's living standards continue to improve, various home appliances have entered thousands of households. Along with this, safety accidents such as fires caused by circuit overload or short circuit due to improper use of home appliances or quality problems of home appliances have occurred. The research and development of electrical safety products such as overload protection switches has received widespread attention.

[0003] Existing overload protection switches generally include a shell, a connecting component, a thermal bimetallic strip and a lifting plate. The connecting component includes a neutral pin and a live pin, both of which are fixedly arranged on the shell, and one end of the thermal bimetallic strip is fixed to and electrically connected to the live pin; the switch component includes a button and a lifting plate, the button is rotatably connected to the shell, one end of the lifting plate is connected to the button, and the other end of the lifting plate is snap-fitted with the other end of the thermal bimetallic strip; when the switch is open, the button rotates in one direction, and the lifting plate lifts the thermal bimetallic strip, and when the switch is open, the button rotates in the other direction, thereby driving the lifting plate to press down the thermal bimetallic strip; when the switch is overloaded, the excessive current causes the thermal bimetallic strip to heat up, expand and deform, and then bounces up and pushes the button to rotate in one direction through the lifting plate, thereby opening the switch.

[0004] With regard to the above-mentioned related technologies, when the switch is overloaded, the thermal bimetal strip needs to heat up, expand and deform to a certain extent before it has enough elastic force to push the button to rotate, thereby achieving the circuit breaker of the switch, which makes the overload switch not sensitive enough to the switch overload. As the friction resistance between the button and the shell increases with the use of the switch, the thermal bimetal strip needs a larger deformation to push the button to rotate, and a larger deformation of the thermal bimetal strip requires a higher overload temperature, which causes the overload temperature of the thermal bimetal strip to exceed the safety range, and then causes the shell to be damaged due to the excessively high overload temperature of the thermal bimetal strip. Summary of the invention

[0005] In order to make the overload switch sufficiently sensitive to switch overload and not easily cause the thermal bimetal strip to require greater deformation to achieve switch disconnection during use, the present application provides an overload protection switch.

[0006] The present application provides an overload protection switch adopting the following technical solution:

[0007] An overload protection switch comprises a housing, a connection assembly, an overload assembly and a switch assembly, wherein the connection assembly comprises a live wire pin and a first neutral wire pin, and the live wire pin and the first neutral wire pin are both fixedly arranged on the housing;

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

[0009] The switch assembly includes a button and a lifting piece, the button is slidably matched with the housing, the lifting piece includes a main body, a crimping part and a lifting part, the main body is rotatably connected to the housing, the main body is provided with a lifting groove, the thermal bimetallic strip is passed through the lifting groove, the crimping part is fixedly connected to one side of the main body, and the lifting part is fixedly connected to one end of the main body;

[0010] When the button slides toward the shell, the button is connected to the crimping part and pushes the main body to rotate until the other end of the thermal bimetallic strip abuts against the first neutral pin, and the button is disconnected from the crimping part. When the button slides away from the shell, the button is connected to the lifting part and pushes the main body to rotate until the other end of the thermal bimetallic strip abuts against the first neutral pin.

[0011] By adopting the above technical solution, when the switch is open, the button slides toward the direction close to the shell, and when the button slides to the set position, it is connected with the crimping part, thereby pushing the crimping part to rotate, thereby pushing the main body to rotate, thereby driving the thermal bimetallic strip to abut against the first neutral pin, so that the live pin is electrically connected to the first neutral pin, and at the same time, the connection between the button and the crimping part is disconnected, when the switch is disconnected, the button is reset in the direction away from the shell, and when the button slides to the set position, the button is connected to the lifting part, as the button continues to slide, the button pushes the lifting part to rotate, thereby driving the main body to rotate, thereby driving the thermal bimetallic strip to disengage from the abutment with the first neutral pin, so that the electrical connection between the live pin and the first neutral pin is disconnected, and at the same time, the connection between the button and the lifting part is disconnected;

[0012] When the switch is overloaded, the thermal bimetallic strip is deformed due to overheating, so that the thermal bimetallic strip moves away from the first neutral pin, thereby driving the main body to rotate, so that the crimping part rotates to the position where the crimping part is when the switch is disconnected. At this time, when the button is reset and passes the set position, it is not connected to the pulling part, but is directly reset. Subsequently, when the button is pushed to slide toward the shell, when the button slides to the set position, the button is connected to the crimping part and continues the above working stroke. This improves the problem that when the switch is overloaded, the thermal bimetallic strip needs to heat up, expand and deform to a certain extent before it has enough elastic force to push the button to rotate, thereby realizing the disconnection of the switch, thereby making the overload switch not sensitive to switch overload. As the friction resistance between the button and the shell increases with the use of the switch, the thermal bimetallic strip needs a larger deformation to push the button to rotate, and a larger deformation of the thermal bimetallic strip requires a higher overload temperature, which causes the overload temperature of the thermal bimetallic strip to exceed the safety range, thereby causing the shell to be damaged due to the excessively high overload temperature of the thermal bimetallic strip.

[0013] Optionally, the switch assembly further comprises a driving slider, a driving spring and a toggle rod, wherein the driving slider is slidably matched with the shell and fixedly connected to the button, one end of the driving spring is connected to the driving slider, and the other end of the driving spring is connected to the shell, the driving slider is provided with a toggle slot, and the shell is provided with a driving slot, one end of the toggle rod is penetrated through the toggle slot, and the other end of the toggle rod is penetrated through the driving slot, the driving slot comprises a circuit breaker and a passage portion, the circuit breaker and the passage portion are connected, the other connecting opening of the circuit breaker and the passage portion is a passage opening, and a connecting opening of the circuit breaker and the passage portion is a circuit breaker;

[0014] When the switch is disconnected, the crimping portion is located at the top of the passage opening, and the toggle rod is inserted into the disconnecting portion. When the switch is connected, the lifting portion is located at the top of the disconnecting portion, and the toggle rod is inserted into the passage portion.

[0015] By adopting the above technical solution, when the button slides toward the direction close to the shell, the button drives the driving slider to slide toward the direction close to the shell, thereby driving the toggle rod to slide along the circuit breaker portion toward the direction close to the passage portion. When the toggle rod slides to the passage opening, the toggle rod abuts against the crimping portion located at the top of the passage opening, and then the toggle rod pushes the crimping portion to rotate, so that the switch is switched from circuit breaker to passage. At the same time, the toggle rod is disengaged from the abutment with the crimping portion, and the toggle rod is engaged with the groove body of the passage portion.

[0016] When the switch needs to be switched from passage to circuit breaker, the button is pressed, so that the button slides toward the shell body, thereby causing the toggle rod to disengage from the snap-fitting fit with the passage portion, and as the driving spring pushes the driving slider to reset, the toggle rod slides along the passage portion toward the circuit breaker portion. When the toggle rod slides to the circuit breaker opening, the toggle rod abuts against the lifting portion, and then the toggle rod pushes the lifting portion to rotate, thereby switching the switch from passage to circuit breaker. At the same time, the toggle rod disengages from the abutting fit with the lifting portion, and the toggle rod snaps into fit with the circuit breaker slot, thereby making switching between circuit breaker and passage of the switch simpler and more convenient, and there is no direct connection between the button and the lifting sheet, so that the rotation of the lifting sheet is not easy to drive the button to slide, making it easier to use.

[0017] Optionally, the drive groove body is fixedly provided with a first inclined block and a second inclined block, the first inclined block is located at the passage opening; the first inclined block is inclined from bottom to top from one end close to the breaking part to one end close to the passage part; the second inclined block is inclined from bottom to top from one end close to the passage part to one end close to the breaking part.

[0018] Optionally, the switch assembly further comprises a light emitting board, wherein the light emitting board is fixedly engaged with the button, and when the light emitting board emits light, the button lights up.

[0019] Optionally, the switch assembly further includes two connecting springs, both of which are located between the button and the housing, one end of each of the connecting springs is fixedly connected to the light-emitting board, and the other end of each of the connecting springs is fixedly connected to the housing.

[0020] Optionally, the connection assembly further includes a second neutral pin, and the second neutral pin is fixedly disposed on the housing;

[0021] One end of the two connecting springs is electrically connected to the light-emitting board, the other end of one connecting spring is electrically connected to the live wire pin, and the other end of the other connecting spring is electrically connected to the second neutral wire pin.

[0022] Optionally, the overload component also includes an electrical contact and an electrical post, the electrical contact is fixed and electrically connected to the thermal bimetal strip, the electrical post is fixed and electrically connected to the first neutral line pin, and when the electrical contact and the electrical post are in abutment, the live line pin and the first neutral line pin are electrically connected.

[0023] Optionally, the overload assembly also includes an adjusting screw and an overload spring, the adjusting screw is threadedly connected to the shell, one end of the overload spring is provided with a fixing groove, the other end of the overload spring is provided with an overload groove that is set through, the overload spring is located between the adjusting screw and the thermal bimetallic strip, the adjusting screw is passed through and snap-fitted into the fixing groove, and the thermal bimetallic strip is passed through and snap-fitted into the overload groove.

[0024] Optionally, the shell includes a main shell portion and a cover shell portion, the main shell portion is provided with a plurality of snap-in grooves, and the cover shell portion is fixedly provided with a plurality of snap-in blocks, and when each of the snap-in blocks is passed through and snap-fixed in each of the snap-in grooves, the main shell portion and the cover shell portion are fixedly connected.

[0025] Optionally, the main shell is fixedly provided with two sliding columns, and the button is provided with two sliding holes that penetrate therethrough. When the button is slidingly engaged with the shell, the two sliding columns are respectively penetrated and slidingly engaged with the two sliding holes. The outer circumferential surfaces of the two sliding columns are fixedly provided with snap-fitting protrusions. When the button is reset, the two snap-fitting protrusions abut against the button.

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

[0027] 1. When the switch is on, the button slides toward the direction close to the shell, and when the button slides to the set position, it is connected with the crimping part, thereby pushing the crimping part to rotate, thereby pushing the main body to rotate, thereby driving the thermal bimetallic strip to abut against the first neutral pin, so that the live pin is electrically connected to the first neutral pin, and at the same time, the connection between the button and the crimping part is disconnected. When the switch is off, the button is reset in the direction away from the shell, and when the button slides to the set position, the button is connected to the lifting part. As the button continues to slide, the button pushes the lifting part to rotate, thereby driving the main body to rotate, thereby driving the thermal bimetallic strip to disengage from the abutment with the first neutral pin, thereby disconnecting the electrical connection between the live pin and the first neutral pin, and at the same time, the connection between the button and the lifting part is disconnected;

[0028] When the switch is overloaded, the thermal bimetallic strip is deformed due to overheating, so that the thermal bimetallic strip moves away from the first neutral pin, thereby driving the main body to rotate, so that the crimping part rotates to the position where the crimping part is when the switch is disconnected. At this time, when the button is reset and passes the set position, it is not connected to the pulling part, but is directly reset. Subsequently, when the button is pushed to slide toward the shell, when the button slides to the set position, the button is connected to the crimping part and continues the above working stroke. This improves the problem that when the switch is overloaded, the thermal bimetallic strip needs to heat up, expand and deform to a certain extent before it has enough elastic force to push the button to rotate, thereby realizing the disconnection of the switch, thereby making the overload switch not sensitive to switch overload. As the friction resistance between the button and the shell increases with the use of the switch, the thermal bimetallic strip needs a larger deformation to push the button to rotate, and a larger deformation of the thermal bimetallic strip requires a higher overload temperature, which causes the overload temperature of the thermal bimetallic strip to exceed the safety range, thereby causing the shell to be damaged due to the excessively high overload temperature of the thermal bimetallic strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0030] Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the present application;

[0031] Figure 3 This is a schematic diagram of the explosion structure of the shell of the embodiment of the present application;

[0032] Figure 4 It is a schematic diagram of the structure of the connection components of an embodiment of the present application;

[0033] Figure 5 It is a schematic diagram of the structure of the overload component of an embodiment of the present application;

[0034] Figure 6 It is a schematic diagram of the button structure of an embodiment of the present application;

[0035] Figure 7 yes Figure 4 A magnified view of part A;

[0036] Figure 8 This is a schematic diagram of the structure of the lifting sheet in the embodiment of the present application;

[0037] Fig. 9 It is a schematic diagram of the structure of the driving component of an embodiment of the present application;

[0038] Fig.10 It is a schematic diagram of the structure of the toggle lever in the embodiment of the present application;

[0039] Fig.11 It is a schematic diagram of the process of the switch switching from the disconnected state to the connected state;

[0040] Fig.12 It is a schematic diagram of the process of the switch switching from the on state to the off state.

[0041] Explanation of reference numerals: 1. Shell; 11. Main shell; 111. Overload chamber; 112. Snap-fit ​​groove; 113. Sliding column; 1131. Snap-fit ​​protrusion; 114. Driving groove; 1141. Breaker; 1142. Passageway; 1143. Passageway opening; 1144. Breaker opening; 1145. First tilting block; 1146. Second tilting block; 12. Cover shell; 121. Snap-fit ​​block; 2. Connecting assembly; 21. Live wire pin; 22. First neutral wire pin; 23. Second neutral wire pin; 3. Overload assembly; 31. Thermal bimetal Plate; 32, electrical contact; 33, electrical post; 34, adjusting screw; 35, overload spring; 351, fixing slot; 352, overload slot; 4, switch assembly; 41, button; 411, sliding hole; 42, light-emitting board; 43, connecting spring; 44, lifting plate; 441, main body; 4411, lifting slot; 442, crimping part; 443, lifting part; 45, driving slider; 451, toggle slot; 46, driving spring; 47, toggle rod; 471, first rod body; 472, second rod body; 473, third rod body. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-12 This application is described in further detail.

[0043] The present application embodiment discloses an overload protection switch. Figure 1 and Figure 2 An overload protection switch includes a housing 1, a connecting component 2, an overload component 3 and a switch component 4, wherein the connecting component 2, the overload component 3 and the switch component 4 are all arranged in the housing 1.

[0044] Reference Figure 3 The shell body 1 includes a main shell portion 11 and a cover shell portion 12. The main shell portion 11 is provided with an overload cavity 111 on one side close to the cover shell portion 12. The main shell portion 11 is provided with a plurality of snap-in grooves 112. The cover shell portion 12 is fixedly provided with a plurality of snap-in blocks 121. When each snap-in block 121 is passed through and snap-fixed in each snap-in groove 112, the main shell portion 11 and the cover shell portion 12 are fixedly connected, and the cover shell portion 12 seals the overload cavity 111.

[0045] Reference Figure 4 and Figure 5The connecting component 2 includes a live wire pin 21, a first neutral wire pin 22 and a second neutral wire pin 23. The live wire pin 21 is snap-fitted and fixed to the main shell portion 11 and one end of which is located in the overload cavity 111. The live wire pin 21 is used to be electrically connected to the live wire. The first neutral wire pin 22 is snap-fitted and fixed to the main shell portion 11 and one end of which is located in the overload cavity 111. The first neutral wire pin 22 is used to be electrically connected to the neutral wire. The length direction of the live wire pin 21 is toward one side of the thickness direction of the main shell portion 11, and the length direction of the first neutral wire pin 22 is toward the other side of the thickness direction of the main body portion 441. The second neutral wire pin 23 is snap-fitted and fixed to the side of the main body portion 441.

[0046] Reference Figure 4 and Figure 5 The overload component 3 includes a thermal bimetallic strip 31, an electrical contact 32 and an electrical post 33. In the embodiment of the present application, the thermal bimetallic strip 31 has elasticity and thermal deformation capabilities. The thermal bimetallic strip 31 is located in the overload cavity 111. One end of the thermal bimetallic strip 31 is fixed to the main shell 1 and electrically connected to the live wire pin 21. The other end of the thermal bimetallic strip 31 is fixed and electrically connected to the electrical contact 32. The electrical post 33 is fixed and electrically connected to the first neutral wire pin 22. When the electrical contact 32 and the electrical post 33 are abutted, the thermal bimetallic strip 31 is electrically connected to the first neutral wire pin 22, so that the live wire pin 21 is electrically connected to the first neutral wire pin 22, so that the switch is in a circuit state. When the electrical contact 32 and the electrical post 33 are disengaged from the abutment, the thermal bimetallic strip 31 is disengaged from the electrical connection with the first neutral wire pin 22, so that the live wire pin 21 is disengaged from the electrical connection with the first neutral wire pin 22, so that the switch is switched from the circuit state to the circuit-breaking state.

[0047] Reference Figure 4 and Figure 5 The overload assembly 3 also includes 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 U-shaped and has elasticity. The overload spring 35 is located in the overload cavity 111. A fixing groove 351 is provided at one end of the overload spring 35, and an overload groove 352 is provided at the other end of the overload spring 35. The overload spring 35 is located between the adjusting screw 34 and the thermal bimetallic strip 31. The adjusting screw 34 is penetrated and snap-fitted in the fixing groove 351, so that the adjusting screw 34 is snap-fitted with the overload spring 35. The end of the thermal bimetallic strip 31 away from the live wire pin 21 is penetrated and snap-fitted in the overload groove 352, so that the thermal bimetallic strip 31 is snap-fitted with the overload spring 35.

[0048] When the switch overload thermal bimetal 31 overheats and deforms, the overload current causes the thermal bimetal 31 to heat up, expand and deform, thereby causing the thermal bimetal 31 to have a tendency to tilt in the direction away from the first neutral pin 22, wherein the thermal bimetal 31 has the largest deformation at one end close to the overload spring piece 35, and in the process of the thermal bimetal 31 tilting in the direction away from the first neutral pin 22, it drives one end of the overload spring piece 35 to move in the direction away from the first neutral pin 22, and when the thermal bimetal 31 is basically horizontal as a whole, the overload spring piece 35 moves close to one end of the thermal bimetal 31 to the overload rebound point of the overload spring piece 35, thereby causing the elastic force direction of the overload spring piece 35 to change to the direction away from the first neutral pin 22, thereby causing the overload spring piece 35 to bounce the thermal bimetal 31, so that the power contact and the power post 33 are separated to form a circuit break, thereby playing a role in overload protection.

[0049] By moving the adjusting screw 34 toward or away from the overload cavity 111, the height of the overload spring 35 is controlled, thereby finely adjusting the specifications of the product. When the adjusting screw 34 moves toward the overload cavity 111, the disconnection time of the thermal bimetallic strip 31 when overloaded becomes longer. When the adjusting screw 34 moves away from the overload cavity 111, the disconnection time of the thermal bimetallic strip 31 when overloaded becomes shorter.

[0050] Reference Figure 3 and Figure 6 The switch assembly 4 includes a button 41. Two sliding columns 113 are fixedly provided on one side of the main shell 11. The button 41 is provided with two penetrating sliding holes 411. The two sliding holes 411 are symmetrically distributed along the center plane of the button 41. When the two sliding columns 113 are respectively penetrated and slidably matched in the two sliding holes 411, the button 41 is slidably matched in the main shell 11. The outer circumferential surfaces of the two sliding columns 113 are fixedly provided with snap-fitting protrusions 1131. When the switch is in the off-circuit state, the two snap-fitting protrusions 1131 are both abutted and matched with the button 41.

[0051] Reference Figure 2 and Figure 6 The switch assembly 4 also includes a light-emitting board 42 and two connecting springs 43. The light-emitting board 42 is clamped and fixed on the side of the button 41 close to the main shell 11. The two connecting springs 43 are located between the button 41 and the shell 1. One end of the two connecting springs 43 is fixed and electrically connected to the light-emitting board 42, and the other ends of the two connecting springs 43 are fixedly connected to the shell 1. The other end of one connecting spring 43 is electrically connected to the live wire pin 21, and the other end of the other connecting spring 43 is electrically connected to the second neutral wire pin 23, so that when the switch is powered on, the light-emitting board 42 is always in a normally bright state, so that the button 41 always remains normally bright, making it easier to find the position of the button 41.

[0052] Reference Figure 7The main shell 11 is provided with a driving groove 114 on one side close to the cover shell 12. The driving groove 114 includes a circuit breaker 1141 and a passage 1142. The circuit breaker 1141 and the passage 1142 are connected. The circuit breaker 1141 is located on the side away from the main shell 11, and the passage 1142 is located on the side close to the main shell 11. Another connecting opening between the circuit breaker 1141 and the passage 1142 is a passage opening 1143. The circuit breaker 1141 and the passage 1142 are connected. The connecting opening is a circuit breaker opening 1144, and a first inclined block 1145 and a second inclined block 1146 are fixedly arranged at the bottom of the driving groove 114. The first inclined block 1145 is located at the passage opening 1143, and the first inclined block 1145 is inclined from bottom to top from one end close to the circuit breaker portion 1141 to one end close to the passage portion 1142, and the second inclined block 1146 is inclined from bottom to top from one end close to the passage portion 1142 to one end close to the circuit breaker portion 1141.

[0053] Reference Figure 8 The switch assembly 4 also includes a lifting piece 44, which includes a main body 441, a crimping portion 442 and a lifting portion 443. The main body 441 is rotatably connected to the shell 1, and the main body 441 is provided with a lifting groove 4411. The lifting groove 4411 in the embodiment of the present application is in the shape of a groove, and one side of the thermal bimetallic strip 31 is penetrated in the pulling groove 4411 and is engaged with the main body 441. The crimping portion 442 is fixedly connected to one side of the main body 441, and the lifting portion 443 is fixedly connected to one end of the main body 441. When the switch is disconnected, the crimping portion 442 is located at the top of the passage opening 1143, and the toggle rod 47 is penetrated in the disconnecting portion 1141. When the switch is connected, the lifting portion 443 is located at the top of the disconnecting opening 1144, and the toggle rod 47 is penetrated in the passage portion 1142.

[0054] Reference Fig. 9 and Fig.10 The switch assembly 4 also includes a driving slider 45, a driving spring 46 and a toggle rod 47. The driving slider 45 is slidably fitted in the main shell 11 and fixedly connected to the light-emitting board 42. The driving spring 46 is located between the driving slider 45 and the main shell 11. One end of the driving spring 46 is connected to the driving slider 45, and the other end of the driving spring 46 is connected to the main shell 11. The toggle rod 47 includes a first rod body 471, a second rod body 472 and a third rod body 473. The first rod body 471, the second rod body 472 and the third rod body 473 are fixedly connected in sequence. The driving slider 45 is provided with a toggle slot 451. The first rod body 471 is penetrated in the toggle slot 451, and the third rod body 473 is penetrated in the driving slot 114.

[0055] Reference Fig.11When the switch is switched from circuit breaker to passage, the button 41 is pressed, thereby pushing the button 41 to slide toward the housing 1, and the button 41 drives the driving slider 45 to slide toward the housing 1, thereby driving the third rod 473 to slide along the circuit breaker portion 1141 toward the passage portion 1142. When the third rod 473 moves to the set position, the third rod 473 slides along the inclined direction of the first inclined block 1145 toward the cover shell portion 12 until the third rod 473 moves to the passage opening 1143, and the third rod 473 abuts against the crimping portion 442, thereby When the third rod 473 continues to move, it pushes the crimping part 442 to rotate, thereby driving the lifting piece 44 to rotate, so that the lifting part 443 rotates to the top of the circuit breaker 1144, and the main body 441 pushes the thermal bimetallic strip 31 to move toward the first neutral pin 22 until the power contact 32 and the power post 33 abut and cooperate. At the same time, the third rod 473 breaks away from the abutment with the crimping part 442 and enters the passage part 1142 from the circuit breaker part 1141. At this time, the push of the button 41 is stopped, and the third rod 473 is snap-fitted with the groove body of the passage part 1142.

[0056] Reference Fig.12 When the switch is switched from passage to disconnection, the button 41 is pressed until the button 41 abuts against the main shell 11, and then the button 41 is released, so that the third rod 473 is disengaged from the engagement with the passage portion 1142. As the driving spring 46 pushes the driving slider 45 to reset, the third rod 473 slides along the passage portion 1142 toward the disconnection portion 1141. When the third rod 473 moves to the set position, the third rod 473 slides along the inclination direction of the second inclined block 1146 toward the cover shell 12 until the third rod 473 moves to the disconnection opening 1144, and the third rod 473 abuts against the lifting portion 443, so that the third rod 4 When 73 continues to move, it pushes the lifting portion 443 to rotate, thereby driving the lifting sheet 44 to rotate, so that the crimping portion 442 rotates to the top of the passage opening 1143, and the main body 441 pushes the thermal bimetallic strip 31 to move away from the first neutral pin 22 until the power contact 32 and the power post 33 are disengaged from the abutment. At the same time, the third rod body 473 is disengaged from the abutment with the lifting portion 443 and enters the circuit breaker portion 1141 from the passage portion 1142 until the driving slider 45 is reset. At this time, the third rod body 473 is engaged with the groove body of the circuit breaker portion 1141, so that the switch completes an opening and closing cycle of switching from the circuit breaker state to the passage state and then switching to the circuit breaker state.

[0057] The implementation principle of an overload protection switch in the embodiment of the present application is as follows: when the switch overload thermal bimetallic strip 31 is deformed and bounces up in the direction away from the first neutral line pin 22, the thermal bimetallic strip 31 pushes the pulling piece 44 to rotate, so that the position of the pulling piece 44 changes from the passage rotation to the circuit breaking state, that is, the pulling portion 443 is separated from the top of the circuit breaking opening 1144, and the crimping portion 442 rotates to the top of the passage opening 1143. When the pulling piece 44 rotates, the position of the third rod 473 remains unchanged and remains engaged with the passage portion 1142, so that the position of the button 41 remains unchanged, so that the position change of the pulling piece 44 is not easy to affect the position of the button 41. When the switch is pressed and then released, the third rod 473 is moved from the passage to the circuit breaking state. When the part 1142 is switched to be engaged with the circuit-breaking part 1141, the switch enters the next opening and closing cycle, which improves the problem that when the switch is overloaded, the thermal bimetallic strip 31 needs to heat up, expand and deform to a certain extent before it has enough elastic force to push the button 41 to rotate, thereby realizing the circuit breaking of the switch, thereby making the overload switch not sensitive enough to the switch overload, and as the friction resistance between the button 41 and the shell 1 increases with the use of the switch, the thermal bimetallic strip 31 needs a larger deformation to push the button 41 to rotate, and a larger deformation of the thermal bimetallic strip 31 requires a higher overload temperature, which causes the overload temperature of the thermal bimetallic strip 31 to exceed the safety range, thereby causing the shell 1 to be damaged due to the excessively high overload temperature of the thermal bimetallic strip 31.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An overload protection switch, characterized in that: It comprises a housing (1), a connection component (2), an overload component (3) and a switch component (4), wherein the connection component (2) comprises a live wire pin (21) and a first neutral wire pin (22), and the live wire pin (21) and the first neutral wire pin (22) are both fixedly arranged on the housing (1); The overload component (3) comprises a thermal bimetallic strip (31), one end of the thermal bimetallic strip (31) being electrically connected to the live wire pin (21), and when the first neutral wire pin (22) and the live wire pin (21) are electrically connected, the other end of the thermal bimetallic strip (31) abuts against and is electrically connected to the first neutral wire pin (22); The switch assembly (4) comprises a button (41) and a lifting piece (44); the button (41) is slidably engaged with the housing (1); the lifting piece (44) comprises a main body (441), a crimping portion (442) and a lifting portion (443); the main body (441) is rotatably connected to the housing (1); the main body (441) is provided with a lifting groove (4411); the thermal bimetallic strip (31) is inserted into the lifting groove (4411); the crimping portion (442) is fixedly connected to one side of the main body (441); and the lifting portion (443) is fixedly connected to one end of the main body (441); When the button (41) slides toward the shell (1), the button (41) is connected to the crimping portion (442) and pushes the main body (441) to rotate until the other end of the thermal bimetallic strip (31) abuts against the first neutral pin (22), and the button (41) is disconnected from the crimping portion (442). When the button (41) slides away from the shell (1), the button (41) is connected to the lifting portion (443) and pushes the main body (441) to rotate until the other end of the thermal bimetallic strip (31) is disconnected from the first neutral pin (22).

2. An overload protection switch according to claim 1, characterized in that: The switch assembly (4) further comprises a driving slider (45), a driving spring (46) and a toggle rod (47); the driving slider (45) is slidably matched with the housing (1) and is fixedly connected to the button (41); one end of the driving spring (46) is connected to the driving slider (45); the other end of the driving spring (46) is connected to the housing (1); the driving slider (45) is provided with a toggle groove (451); the housing (1) is provided with a driving groove (114); the toggle rod (47) is provided with a driving groove (114); ) one end of the toggle rod (47) is inserted into the toggle slot (451), the other end of the toggle rod (47) is inserted into the driving slot (114), the driving slot (114) comprises a disconnecting portion (1141) and a passage portion (1142), the disconnecting portion (1141) and the passage portion (1142) are connected, the other connecting opening of the disconnecting portion (1141) and the passage portion (1142) is a passage opening (1143), and the first connecting opening of the disconnecting portion (1141) and the passage portion (1142) is a disconnecting opening (1144); When the switch is disconnected, the crimping portion (442) is located at the top of the passage opening (1143), and the toggle rod (47) is inserted through the disconnecting portion (1141); when the switch is connected, the lifting portion (443) is located at the top of the disconnecting portion (1144), and the toggle rod (47) is inserted through the passage portion (1142).

3. An overload protection switch according to claim 2, characterized in that: The driving groove (114) is fixedly provided with a first tilting block (1145) and a second tilting block (1146); the first tilting block (1145) is located at the passage opening (1143); the first tilting block (1145) is tilted from bottom to top from an end close to the circuit breaker (1141) to an end close to the passage (1142); the second tilting block (1146) is tilted from bottom to top from an end close to the passage (1142) to an end close to the circuit breaker (1141).

4. An overload protection switch according to claim 1, characterized in that: The switch assembly (4) further comprises a light-emitting board (42), wherein the light-emitting board (42) is fixedly engaged with the button (41), and when the light-emitting board (42) emits light, the button (41) lights up.

5. An overload protection switch according to claim 4, characterized in that: The switch assembly (4) further comprises two connecting springs (43), the two connecting springs (43) being located between the button (41) and the housing (1), one end of the two connecting springs (43) being fixedly connected to the light-emitting board (42), and the other end of the two connecting springs (43) being fixedly connected to the housing (1).

6. An overload protection switch according to claim 5, characterized in that: The connecting assembly (2) further comprises a second neutral pin (23), wherein the second neutral pin (23) is fixedly arranged on the housing (1); One end of the two connecting springs (43) is electrically connected to the light-emitting board (42), the other end of one connecting spring (43) is electrically connected to the live wire pin (21), and the other end of the other connecting spring (43) is electrically connected to the second neutral wire pin (23).

7. An overload protection switch according to claim 1, characterized in that: The overload component (3) further comprises an electrical contact (32) and an electrical post (33); the electrical contact (32) is fixed to and electrically connected to the thermal bimetallic strip (31); the electrical post (33) is fixed to and electrically connected to the first neutral pin (22); when the electrical contact (32) and the electrical post (33) are in contact, the live pin (21) and the first neutral pin (22) are electrically connected.

8. An overload protection switch according to claim 7, characterized in that: The overload assembly (3) further comprises an adjusting screw (34) and an overload spring piece (35); the adjusting screw (34) is threadedly connected to the housing (1); one end of the overload spring piece (35) is provided with a fixing groove (351); the other end of the overload spring piece (35) is provided with an overload groove (352) extending therethrough; the overload spring piece (35) is located between the adjusting screw (34) and the thermal bimetallic strip (31); the adjusting screw (34) is passed through and snap-fitted to the fixing groove (351); and the thermal bimetallic strip (31) is passed through and snap-fitted to the overload groove (352).

9. An overload protection switch according to claim 1, characterized in that: The shell (1) comprises a main shell portion (11) and a cover shell portion (12); the main shell portion (11) is provided with a plurality of snap-fit ​​grooves (112); the cover shell portion (12) is fixedly provided with a plurality of snap-fit ​​blocks (121); when each snap-fit ​​block (121) is passed through and snap-fitted to each snap-fit ​​groove (112), the main shell portion (11) and the cover shell portion (12) are fixedly connected.

10. An overload protection switch according to claim 9, characterized in that: The main shell part (11) is fixedly provided with two sliding columns (113), and the button (41) is provided with two sliding holes (411) penetrating therethrough. When the button (41) is slidingly engaged with the shell (1), the two sliding columns (113) are respectively penetrated and slidingly engaged with the two sliding holes (411). The outer circumferential surfaces of the two sliding columns (113) are fixedly provided with snap-fitting protrusions (1131). When the button (41) is reset, the two snap-fitting protrusions (1131) are both in abutment with the button (41).

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