Fully tripped overload protection switch with reverse restart switching structure

Abstract

The present invention discloses a completely tripping overload protection switch with a reverse restart switching structure, and in particular, a method for achieving a three-stage switching safety foolproof operation commonly used in large overload switches on a small overload switch; wherein: a lampshade parallel stagnation position is added as an overload indication, and when resetting, it is required to first press back to reset for reconfirmation, and the double metal pieces are rearranged and then pressed to set before restarting; due to the stagnation position and reverse restart structure when overloaded, it can be avoided that an electrical appliance that has been short-circuited is repeatedly reset without troubleshooting, resulting in a reduction in the life of the overload switch and repeated exposure to danger, or that an electrical appliance that has been overloaded and tripped is reset due to misjudgment, and then overloaded again and causing danger; at the same time, the lampshade can still be completely tripped when pressed, and the overload tripping will not be repeated and dangerous, thereby improving the efficacy.

Description

Technical Field

[0001] The present invention relates to an overload protection switch, and more particularly to a method for achieving a three-stage switching safety foolproof operation conventionally used by a large overload switch (MCCB) in a small overload protection switch. Background Art

[0002] Low-voltage circuit breakers are called molded-case circuit breakers (MCCB) in Europe and the United States. They are low-voltage overcurrent protection circuit breakers. Compared with miniature circuit breakers (MCBs), molded-case circuit breakers have larger rated currents and breaking capacities. They are called no-fuse circuit breakers (NFBs) in Japan and no-fuselage circuit breakers in China. Another type of product with leakage protection is classified as residual current circuit breaker (ELCB). For products with relatively small capacity, they are called MCB or ELB. Usually, MCCB and ELCB circuit breakers are used for large breaking capacity, commonly known as industrial type. MCB and ELB are used for small breaking capacity, commonly known as household lamp plug circuit breakers. Their main function is to protect the safety of equipment and lines. When an overload or short circuit occurs, they trip and isolate the power supply. If it is ELCB or ELB, the protection function of leakage tripping is added. Circuit breakers are the main isolating switches in the world to protect the safety of equipment and lines, and are also the most common products in the world.

[0003] Figure 1A and Figure 1B The invention discloses an existing overcurrent protection switch 10, which generally comprises: a housing 11, a lampshade 12 for pressing is provided at the upper end thereof, and a first connecting piece 12a and a second connecting piece 12b are provided at the lower end thereof. Some overcurrent protection switches 10 further comprise a third connecting piece 12c for providing power required by a neon lamp 15, but are not limited thereto. The first connecting piece 12a is provided with a double metal contact spring piece 13 and a first contact point 131, and the second connecting piece 12b is provided with a second contact point 121 which can contact the first contact point on the upper side thereof; a linking member 14, one end of which is pivotally disposed on the lampshade 12c. The other end is linked to the free end of the double metal contact spring 13, and through the pressing of the lampshade 12, the first contact 131 on the double metal contact spring 13 is driven to contact the second contact 121 to form conduction (ON), and when the current is overloaded, the flexure of the double metal contact spring 13 is deformed due to the increase in temperature, and the first contact 131 is separated from the second contact 121 to form a circuit (OFF), thereby forming an overcurrent protection switch 10. This type of patent is found in Taiwan Patents No. 540811, 367091, 320335, 262168, 208384, etc.

[0004] However, the above-mentioned existing small overcurrent protection switch 10 does not have the multi-stage switching safety foolproof operation method commonly used in large overload switches (MCCB). Since a cyclic trip structure is adopted, when the lampshade 12 is pressed or stuck, the double metal contact spring 13 repeatedly opens and breaks the circuit (ON←→OFF), resulting in repeated overloads and loss of the overload protection function. Therefore, the service life and safety of use are still insufficient. Summary of the invention

[0005] The main purpose of the present invention is to provide a completely tripping overload protection switch with a reverse restart switching structure, which can achieve the three-stage switching safety foolproof operation method commonly used by large overload switches (MCCB) on a small overload switch. It adopts an unobstructed completely separated tripping structure. When the lampshade is blocked by external force, the double-closed metal sheet can still successfully complete a single tripping action, and it needs to be restarted by a foolproof operation, which has the effect of increasing the service life and improving the safety of use.

[0006] To achieve the above-mentioned purpose, the technical means adopted by the present invention include: a housing, a lampshade for pressing is provided at the upper end thereof, and a first wiring piece and a second wiring piece are provided at the bottom end thereof, wherein a double metal sheet is connected to the first wiring piece, a contact spring sheet that can bounce up and down is extended from the double metal sheet, a first contact point is provided above the contact spring sheet, and a second contact point that can contact the first contact point is provided at the upper section of the second wiring piece relative to the first contact point; a linkage, one end of which is pivotally arranged in a pivot hole that is biased inwardly at the bottom of the lampshade, and the other end is tilted outwardly to link the double metal sheet, so that when the pivot hole is pushed inwardly, the first contact point on the double metal sheet contacts the second contact point to form conduction (ON), and when the current is overloaded, the flexure of the double metal sheet is deformed due to the increase in temperature, and the first contact point is separated from the second contact point to form a circuit break (OFF), thereby forming a current overload protection switch; wherein:

[0007] The linkage comprises: a cross bar formed on the upper section of the linkage body, which is used to penetrate the pivot hole arranged inwardly at the bottom of the lampshade; a first brake pad formed on the outer side of the middle section of the linkage and extending inwardly; a second brake pad formed on the middle section of the linkage and lower than the first brake pad and extending and bending inwardly; when the linkage is tilted up and down, a forward outward moving guide surface is formed above the second brake pad, and a reverse downward pressing and pushing top surface is formed below the second brake pad, so that the first brake pad and the forward outward moving guide surface of the second brake pad are aligned. A stagnant dislocation zone is formed between the third brake pad formed in the lower section of the linkage and extending inwardly, and a normal operation zone is formed between the reverse downward pressing top surface of the second brake pad and the third brake pad; and the distance that the first brake pad extends inwardly from the linkage body is defined as W1, the distance that the second brake pad extends inwardly from the linkage body is defined as W2, and the distance that the third brake pad extends inwardly from the linkage body is defined as W3, and both W3 and W1 are greater than W2; the housing corresponds to The inner side wall of the linkage is provided with three track walls of different heights, which are the first track wall, the second track wall and the third track wall from top to bottom, wherein the first track wall is a V-shaped concave surface, the second track wall is connected to the lower side of the first track wall and is a flat surface, and the third track wall is connected to the lower side of the second track wall and is an inwardly contracted inclined surface; the other end of the lampshade corresponding to the pivot hole is provided with a top plate extending downward; an elastic plate is provided above the second connecting plate and located at The outer side of the top support piece is used to provide the lampshade with an elastic clamping force, so that when it is switched to SET, it can be forcibly positioned at the tail end of the SET, so that the lower section of the linkage is placed at the bottom of the inner wall of the shell and forms a maximum rotation angle; and when the lampshade is normally pressed to switch ON / OFF, the linkage is driven to rise and fall in an inclined state, and the lower section of the linkage moves up and down between the second track wall and the third track wall and rotates at an angle; the three-stage switching operation includes the following steps:

[0008] a) When the lampshade is switched to ON, the lower section of the linkage member bends along the second track wall to the third track wall, so that the second brake pad pushes the top surface downward in the reverse direction, pushing the free end of the double metal sheet located in the normal operation area from top to bottom to reversely deform it, thereby causing the contact spring to bounce upward, so that the first contact point contacts the second contact point to form conduction (ON);

[0009] b) When the lampshade is switched OFF, the lower section of the linkage member bends along the third track wall to the second track wall, and the third brake pad pulls the free end of the double metal sheet from bottom to top to deform it in the opposite direction, and then the contact spring bounces downward, so that the first contact point contacts the second contact point to form a circuit breaker (OFF);

[0010] c). Furthermore, when the first contact point on the double metal sheet contacts the second contact point to form conduction (ON), the lower section of the linking member is bent and located on the wall of the third track, and the second brake pad is offset to the outermost side of the wall due to the elastic force of the elastic pad. Since the linking member can reach the maximum rotation angle when it moves downward, the second brake pad is nearly vertical at this time, so as to avoid the clamping position of the free end of the double metal sheet. In this way, when the current is overloaded, the flexure of the double metal sheet is deformed due to the increase in temperature, and then it bounces upward, and can directly move the first brake pad by skipping the second brake pad without hindrance, so that the linking member moves upward, and the lampshade is linked to present a break state (BREAK). At this time, the free end of the double metal sheet is located in the stagnant dislocation area between the first brake pad and the second brake pad.

[0011] d). Finally, by pressing the lampshade at the OFF end, a reset action is performed to move the linkage upward to the first track wall surface, and the linkage moves upward and outward through the forward outward movement guide surface on the second brake pad, so that the linkage moves upward smoothly and slides over the free end of the double metal sheet, and returns to the normal operating area under the second brake pad, so that the lampshade can resume normal ON / OFF switching.

[0012] Through the above-mentioned technical means, the present invention has a first brake pad specially designed for the linkage and located above the second brake pad, and a third brake pad formed in the lower section of the linkage and extending inwardly in an arc; the linkage that is offset outward is formed to press outward and cooperate with the inner side wall position of the shell corresponding to the linkage to form three track walls of different heights, thereby achieving a three-stage switching safety and foolproof operation method; and furthermore, it can achieve the addition of a lampshade parallel stagnation position as an overload indication, and it is necessary to press back to the reset (off end) for re-confirmation when resetting. Recognize, and make the double metal pieces rearrange correctly before pressing to set (on end) to restart; because it has a stagnant position and reverse restart structure (foolproof) when overloaded, it can avoid repeatedly operating the reset action (set) of the short-circuited electrical appliance without eliminating the short circuit, resulting in a shortened overload protection switch life and repeated exposure to danger (the test specification is 3 short-circuit tests) or causing the overloaded electrical appliance to be misjudged and reset and overload again. Danger; at the same time, it has the function of being able to completely trip when the lampshade is pressed, and will not repeat the overload tripping cycle to cause danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1A The present invention is a stereoscopic diagram of the appearance of an existing overcurrent protection switch.

[0014] Figure 1B The present invention is a cross-sectional view of an existing overcurrent protection switch.

[0015] Figure 2It is an exploded perspective view of a preferred embodiment of the present invention.

[0016] Figure 3A This is a three-dimensional view of a double metal sheet showing an upward concave shape in a preferred embodiment of the present invention.

[0017] Figure 3B The double metal sheet of the present invention is a concave three-dimensional view.

[0018] Figure 3C It is a three-dimensional view of the appearance of the linkage of the present invention.

[0019] Figure 3D It is a side view of the linkage of the present invention.

[0020] Figure 3E The figure is a three-dimensional view of the appearance of the elastic sheet and the lampshade of the present invention.

[0021] Figure 4 The figure is a three-dimensional diagram of the appearance of a preferred embodiment of the present invention.

[0022] Figure 5A It is a cross-sectional view of a preferred embodiment of the present invention, showing the OFF state.

[0023] Figure 5B It is an enlarged schematic diagram showing that the second brake pad pushes the free end of the double metal sheet from top to bottom to the ON position during normal operation.

[0024] Figure 5C for Figure 5B A magnified schematic diagram of the three orbital walls at different heights.

[0025] Figure 5D It is an enlarged schematic diagram of the third brake pad pulling the free end of the double metal plate to OFF during normal operation.

[0026] Fig. 6A It is a cross-sectional view of a preferred embodiment of the present invention, showing the ON state.

[0027] Figure 6B for Fig. 6A Schematic diagram of the enlarged area indicated by 6B.

[0028] Fig. 7A It is a cross-sectional view of a preferred embodiment of the present invention, which shows the BREAK state.

[0029] Figure 7B for Fig. 7A Schematic diagram of the enlarged area indicated by 7B.

[0030] Fig. 8A It is a cross-sectional view of a preferred embodiment of the present invention, showing the RESET state.

[0031] Figure 8B for Fig. 8A Schematic diagram of the enlarged area indicated by 8B.

[0032] Description of reference numerals: 30-overload protection switch; 31-housing; 311-side cover; 31a-first track wall; 31b-second track wall; 31c-third track wall; 32-lamp cover; 321-pivot hole; 322-top plate; 33-linking member; 331-cross bar; 332-first brake pad; 333-second brake pad; 333a-forward outward moving guide surface; 333b-reverse downward pressing top surface; A-stagnation dislocation area; B-normal operation area; 334-third brake pad; 335-bend; 336-extension foot; 34-neon lamp; 35-concave arc surface; 40-first wiring piece; 41-double metal sheet; 411-free end; 411a-upper concave bend arc shape; 411b-lower concave bend arc shape; 42-contact spring; 421 - first contact point; 50 - second terminal piece; 51 - upper section; 511 - second contact point; 60 - third terminal piece; 70 - elastic piece; 71 - main body; 711 - riveting method; 72 - elastic contact end. DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention through specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0034] First, see Figure 2 to Figure 8B As shown, a preferred embodiment of the overload protection switch 30 of the present invention includes: a housing 31, a lampshade 32 for pressing is provided at the upper end thereof, and in this embodiment, a neon lamp 34 is further provided below the lampshade 32. A first connecting piece 40 and a second connecting piece 50 are provided at the bottom end, and in this embodiment, a third connecting piece 60 is further provided, but not limited thereto. A double metal sheet 41 is connected to the first connecting piece 40, and a contact spring 42 that can bounce up and down is provided in the middle of the inner side of the free end 411 of the double metal sheet 41, and a first contact point 421 is provided above the contact spring 42 away from the free end 411, and a second contact point 511 that can contact with the first contact point 421 is provided on the upper section 51 of the second connecting piece 50; in this embodiment, the housing further includes a side cover 311.

[0035] again Figure 3A The free end 411 of the double metal sheet 41 is shown to be in an upward concave curved shape 411a, so that the contact spring 42 bounces downward; Figure 3BIt is shown that the free end 411 of the double metal sheet 41 is in a concave arc shape 411 b, so that the contact spring 42 bounces upward.

[0036] A linkage 33 has one end pivotally mounted in a pivot hole 321 biased inwardly at the bottom of the lampshade 32, and the other end deviates outwardly to link the double metal sheet 41, so that when the pivot hole 321 is pushed inwardly, the first contact point 421 on the double metal sheet 41 contacts the second contact point 511 to form conduction (ON, i.e., SET terminal), and when the current is overloaded, the flexure of the double metal sheet 41 is deformed due to the increase in temperature, and the first contact point 421 is separated from the second contact point 511 to form a circuit (OFF), thereby forming a current overload protection switch. However, it is found that the above structure is prior art and is not the patent subject of the present invention, so it is not necessary to elaborate on it.

[0037] Please cooperate with Figure 2 , Figure 3C , Figure 3D As shown, the main features of the present invention are: the linking member 33 includes: a cross bar 331 formed on the upper section of the linking member 33 body, which is used to penetrate the pivot hole 321 arranged inwardly at the bottom of the lampshade 32; a first brake plate 332 formed on the outer side of the middle section of the linking member 33 and extending inwardly; a second brake plate 333 formed on the middle section of the linking member 33 and lower than the first brake plate 332 and extending inwardly, and when the linking member is tilted when moving up and down, it is above the second brake plate 333 A forward outward moving guide surface 333a is formed, and a reverse downward pressing and pushing top surface 333b is formed below it, so that a stagnant dislocation area (A) is formed between the forward outward moving guide surface 333a of the first brake pad 332 and the second brake pad 333; a third brake pad 334 is formed in the lower section of the linking member 33 and extends inwardly, and a normal operation area B is formed between the reverse downward pressing and pushing top surface 333b of the second brake pad 333 and the third brake pad 334. In addition, in this embodiment, an extension foot 336 is formed at the bottom of the third brake pad 334; the distance that the first brake pad 332 extends inward from the main body of the linking member 33 is defined as W1, the distance that the second brake pad 333 extends inward from the main body of the linking member 33 is defined as W2, and the distance that the third brake pad 334 extends inward from the main body of the linking member 33 is defined as W3; and W3 and W1 are both greater than W2.

[0038] like Figure 5CAs shown, the housing 31 is provided with three track walls of different heights corresponding to the inner wall position of the linkage 33, which are the first track wall 31a, the second track wall 31b and the third track wall 31c from top to bottom, wherein the first track wall 31a is a V-shaped concave surface, the second track wall 31b is connected to the bottom of the first track wall 31a and is a flat surface, and the third track wall 31c is connected to the bottom of the second track wall 31b and is an inwardly contracted inclined surface.

[0039] The other end of the lampshade 32 corresponding to the pivot hole 321 is provided with a support piece 322; and an elastic piece 70 is provided above the second connecting piece 50 and located outside the support piece 322 to provide the lampshade 32 with an elastic clamping force so that it can be forcibly fixed at the SET tail end when switched to SET. At this time, the lower section of the linking member 33 is located at the bottom of the inner wall of the housing 31, that is, in the area of ​​the third track wall 31c; Figure 3E As shown, in this embodiment, the elastic sheet 70 includes a body 71, which is riveted to the second wiring sheet 50 by means of rivets 711, and an elastic contact end 72 disposed above the body 71, and the elastic contact end 72 is placed on the outer side of the supporting sheet 322, but the present invention is not limited thereto. That is, it is feasible to use an elastic clamping force to force it to be positioned at the bottom outer side of the SET tail end.

[0040] In this embodiment, the housing 31 is provided with a concave arc surface 35 on the surface of the OFF end, so that the user can conveniently press the lamp cover 32 downward to the reset position.

[0041] Thus, when the lampshade 32 is normally pressed to switch ON / OFF, the linkage 33 is driven to rise and fall in an inclined manner, and the lower curved arc 335 of the linkage 33 is displaced along the second track wall 31b and the third track wall 31c; the multi-stage switching operation includes the following steps:

[0042] a) When the lampshade 32 is switched ON, the lower section of the linkage member 33 bends 335 along the second track wall 31b to the third track wall 31c (such as Figure 5B Move the displayed position to Figure 6B The second brake piece 333 pushes the top surface 333b with its downward reverse position to push the free end 411 of the double metal sheet 41 from top to bottom to make it deform in the reverse direction, thereby making the contact spring 42 bounce upward, so that the first contact point 421 contacts the second contact point 511 to form conduction (ON);

[0043] b) When the lampshade 32 is switched OFF, the lower section of the linkage member 33 bends 335 along the third track wall 31c to the second track wall 31b (such as Figure 6B Move the displayed position to Figure 5B As shown in the position, the third brake piece 333 pulls the free end 411 of the double metal sheet 41 from bottom to top to make it deform in the opposite direction, and then the contact spring 42 bounces downward, so that the first contact point 421 contacts the second contact point 511 to form a circuit breaker (OFF);

[0044] c). Furthermore, the first contact point 421 on the double metal sheet 41 contacts the second contact point 511 to form conduction (ON), the lower section of the curved arc 335 of the linkage 33 is located on the third track wall 31c, and the second brake pad 333 is offset to the outermost side of the wall due to the elastic force of the elastic sheet 70, and the linkage 33 is rotated to the maximum angle so that the second brake pad 333 is close to vertical, so as to avoid the clamping position of the free end 411 of the double metal sheet 41; in this way, when the current is overloaded, the flexure of the double metal sheet 41 is deformed due to the increase in temperature, and then bounces upward, and can directly move the first brake pad 332 by skipping the second brake pad 333 without hindrance, so that the linkage 33 moves upward (such as Figure 6B Move the displayed position to Figure 7B The lampshade 32 is in a breakaway state (BREAK), and the free end 411 of the double metal sheet 41 is located in a stagnant misalignment zone (A) between the first brake sheet 332 and the second brake sheet 333;

[0045] d). Finally, by pressing the lampshade 32 at the OFF end, the linkage 33 is reset to move upward to the first track wall, and through the forward outward guide surface 333a above the second brake pad 333, it can smoothly move upward and slide over the free end 411 of the double metal sheet 41, and return to the normal operating area B below the second brake pad, (such as Figure 7B Move the displayed position to Figure 8B The lampshade 32 is moved to the position shown in the figure, so that the lampshade 32 can be restored to the normal ON / OFF switch.

[0046] Through the above-mentioned technical means, the present invention has a first brake pad 332 specially designed for the linking member 33 located above the second brake pad 333, and a third brake pad 334 formed in the lower section of the linking member 33 and extending inwardly in an arc 335; the linking member 33 that is offset outward is formed to push and press the inner side wall position of the housing 31 corresponding to the linking member 33, and is set to form three track wall surfaces 31a, 31b, 31c, 31d, 31d, 31e, 31f, 31f, 31g, 31h, 31h, 31h, 31h, 31c, 31d, 31e, 31f, 31h, 31e, 31f, 31h, 31c, 31d, 31e, 31f, 31h, 31b, 31c, thereby achieving a three-stage switching safety fool-proof operation method; furthermore, a lampshade 32 can be added to the parallel stagnant position as an overload indication, and when resetting, it is necessary to first press back to the reset (off end) for reconfirmation, and the double metal piece 41 is re-arranged into the chain and then pressed to the set (on end) before restarting; because there is a stagnant position and a reverse restart structure (fool-proof) when overloaded, it can be avoided that the short-circuited electrical appliance is repeatedly reset without being eliminated, resulting in a reduction in the life of the overload protection switch and repeated exposure (the test specification is 3 short-circuit tests) or causing the overloaded electrical appliance to be overloaded again in an unknown period of time to cause danger; at the same time, the lampshade 32 can be completely tripped when pressed, and the danger of cyclic overload tripping is improved.

[0047] The above-disclosed drawings and descriptions are only preferred embodiments of the present invention. Any modification or equivalent changes made by persons skilled in the art within the spirit and scope of the present invention should still be included in the scope of the patent application of the present invention.

Claims

1. A fully tripping overload protection switch with a reverse restart switching structure, comprising: A housing, with a lampshade for pressing at the upper end, and a first connecting piece and a second connecting piece at the bottom end, wherein the first connecting piece is connected to a double metal sheet, and the double metal sheet is extended with a contact spring capable of bouncing up and down, and a first contact point is arranged above the contact spring, and an upper section of the second connecting piece is opposite to the first contact point and is provided with a second contact point capable of contacting the first contact point; A linkage, one end of which is pivotally mounted in a pivot hole inwardly disposed at the bottom of the lampshade, and the other end of which is offset outwardly to link the double metal sheet, so that when the pivot hole is pushed inwardly, the first contact point on the double metal sheet contacts the second contact point to form conduction, and when the current is overloaded, the flexure of the double metal sheet is deformed due to the increase in temperature, and the first contact point is separated from the second contact point to form a circuit break, so as to form a current overload protection switch; characterized in that: The linkage comprises: a cross bar formed on the upper section of the linkage body, which is used to pass through the pivot hole arranged inwardly at the bottom of the lampshade; a first brake pad formed on the outer side of the middle section of the linkage and extending inwardly; a second brake pad formed on the middle section of the linkage and lower than the first brake pad and extending inwardly and laterally bent, so that a forward outward moving guide surface is formed above the second brake pad, and a reverse downward pressing top surface is formed below the second brake pad, so that the forward outward moving guide surface between the first brake pad and the second brake pad is , forming a stagnant dislocation zone; a third brake pad formed in the lower section of the linkage and extending inwardly, a normal operation zone is formed between the reverse downward pressing top surface of the second brake pad and the third brake pad; and the distance that the first brake pad extends inwardly from the linkage body is defined as W1, the distance that the second brake pad extends inwardly from the linkage body is defined as W2, and the distance that the third brake pad extends inwardly from the linkage body is defined as W3, and both W3 and W1 are greater than W2; The housing is provided with three track walls of different heights corresponding to the inner side wall position of the linkage member, which are the first track wall, the second track wall and the third track wall in order from top to bottom, wherein the first track wall is a V-shaped concave surface, the second track wall is connected to the lower side of the first track wall and is a flat surface, and the third track wall is connected to the lower side of the second track wall and is an inwardly contracted inclined surface; The other end of the lampshade corresponding to the pivot hole is provided with a top supporting piece extending downwards; An elastic sheet, disposed above the second connecting sheet and located outside the top supporting sheet, for providing the lampshade with an elastic clamping force, so that it can be forcibly fixed at the tail end of the SET when switching to SET, ensuring that the linkage is placed at the bottommost position of the inner side wall of the housing; as well as When the lampshade is normally pressed to switch ON / OFF, the linkage member is driven to rise and fall in an inclined manner, and the lower portion of the linkage member is bent and moved along the second track wall and the third track wall; the three-stage switching operation includes the following steps: a) When the lampshade is switched to ON, the lower section of the linkage member bends along the second track wall to the third track wall, so that the second brake pad pushes the top surface downward in the reverse direction, pushing the free end of the double metal sheet located in the normal operation area from top to bottom to deform it in the reverse direction, thereby causing the contact spring to bounce upward, so that the first contact point contacts the second contact point to form conduction; b) When the lampshade is switched OFF, the lower section of the linkage member bends along the third track wall to the second track wall, and the third brake pad pulls the free end of the double metal sheet from bottom to top to deform it in the opposite direction, and then the contact spring bounces downward, so that the first contact point contacts the second contact point to form a circuit breaker; c) When the first contact point on the double metal sheet contacts the second contact point to form conduction, the lower section of the linkage is located on the third track wall, and the second brake pad is offset to the outermost side of the wall due to the elastic force of the elastic sheet, and the linkage produces a maximum rotation angle to make the second brake pad nearly vertical, so as to avoid the clamping position of the free end of the double metal sheet; in this way, when the current is overloaded, the flexure of the double metal sheet is deformed due to the increase in temperature, and then bounces upward, and can directly move the first brake pad by skipping the second brake pad without hindrance, so that the linkage moves upward, and the lampshade is linked to a jump-off state, at which time the free end of the double metal sheet is located in the stagnant dislocation area between the first brake pad and the second brake pad; d). Finally, by pressing the lampshade at the OFF end, the linkage moves upward to make a return action, so that the lower section of the linkage moves in an arc to the first track wall, and through the forward outward guide surface on the second brake pad, it can smoothly move upward and slide over the free end of the double metal sheet, and return to the normal operating area under the second brake pad, so that the lampshade can resume normal ON / OFF switching.

2. The fully tripping overload protection switch with reverse restart switching structure as claimed in claim 1, characterized in that: The elastic sheet comprises a body and an elastic contact end arranged above the body, and the elastic contact end is placed on the outer side of the supporting sheet.

3. The fully tripping overload protection switch with reverse restart switching structure as claimed in claim 1, characterized in that: The housing further includes a third connecting piece.

4. The fully tripping overload protection switch with reverse restart switching structure as claimed in claim 1, characterized in that: The bottom of the third brake shoe of the linkage member includes an extension leg.

5. The fully tripping overload protection switch with reverse restart switching structure as claimed in claim 1, characterized in that: The shell further includes a side cover.

6. The fully tripping overload protection switch with reverse restart switching structure as claimed in claim 1, characterized in that: The contact spring is formed by extending from the middle of the inner side of the free end of the double metal sheet.

7. The fully tripping overload protection switch with reverse restart switching structure as claimed in claim 1, characterized in that: A neon lamp is further arranged under the lampshade.

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