Overcurrent protection switch

Abstract

The utility model discloses an overcurrent protection switch which comprises a shell, a mounting cavity is formed in the shell, the top surface of the shell is provided with an opening, and the opening is communicated with the mounting cavity; the at least one switch assembly is arranged in the mounting cavity; a cavity opening is formed in at least one side of the shell, and the cover body is arranged on the cavity opening in a covering mode. A clamping position is formed on the inner wall of the cavity opening; the cover body comprises a cover wall and at least one connecting piece, and the connecting piece is arranged on the edge of the cover wall; at least one buckling groove is formed in the bottom of the shell, and a notch is formed in the end, close to the cover body, of the buckling groove; the cover body further comprises at least one clamping piece, the clamping pieces are arranged on the side, opposite to the connecting piece, of the cover wall, and each clamping piece correspondingly penetrates through one notch and is embedded in the corresponding buckling groove. A guide piece is arranged in each buckling groove, one end of each guide piece forms an abutting end, and the abutting ends are located at the ends away from the groove openings; the clamping piece is provided with a matching groove matched with the guiding piece. The cover body further comprises a butt joint piece, the butt joint piece is arranged on the side, facing the installation cavity, of the cover wall in a protruding mode, and the shell is correspondingly provided with a butt joint position in a concave mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to overcurrent protection switch technical field, specifically, an overcurrent protection switch. BACKGROUND

[0002] The overcurrent protection switch is an intelligent electrical protection device that can automatically detect the load condition of an electrical circuit and automatically cut off the power supply when the load is too large to protect the safety of the circuit and electrical equipment.

[0003] For example, a Chinese patent application with publication number CN103050336A discloses an overload protection switch, which includes an operating part, a body part, and a cover part. The operating part is connected to the body part through a rotating shaft, and the cover part is connected to the body part through a combination buckle and a shaft hole. The body part includes a body, a wiring terminal, a movable metal sheet assembly, and a bimetallic sheet limiting block. The movable metal sheet assembly is arranged on the body, and the bimetallic sheet limiting block is arranged below the movable metal sheet assembly. The wiring terminal is arranged below the body. When overcurrent occurs, the movable metal sheet rapidly flips over due to overheating, causing the contact points arranged on the movable metal sheet to separate from the contact points arranged on the wiring terminal, thereby causing the overload protection switch to be turned off.

[0004] The overcurrent protection switch of the above type has the following problems: the cover and the body part are connected through a combination buckle and a shaft hole. This connection method only connects the cover and the body in one direction, which can easily cause the connection to be unstable. In addition, when the cover is disassembled, force needs to be applied to separate the cover and the body, which makes disassembly difficult. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, an overcurrent protection switch is provided.

[0006] To achieve the above-mentioned purpose, the utility model provides an overcurrent protection switch, which comprises

[0007] A shell is provided, and an installation cavity is formed in the shell. The top surface of the shell has an opening, and the opening is in communication with the installation cavity.

[0008] At least one switch assembly is arranged in the installation cavity.

[0009] A button is pivotally arranged in the opening, and the button is connected to each switch assembly to switch the on and off states of the switch assembly.

[0010] At least one cover body is arranged on at least one side of the shell and is provided with a cavity opening, and each cavity opening is provided with a cover body which is arranged on the cavity opening; the inner wall of the cavity opening is provided with a clamping position; the cover body comprises a cover wall and at least one connecting piece which is arranged on the edge of the cover wall; when the cover wall is connected with the shell, the connecting piece abuts against the clamping position; the bottom of the shell is provided with at least one buckling groove, and each buckling groove is provided with a groove opening at one end close to the cover body; the cover body further comprises at least one clamping piece which is arranged on the side of the cover wall opposite to the connecting piece; when the cover wall is connected with the shell, each clamping piece passes through a groove opening and is embedded in the buckling groove; each buckling groove is provided with a guide piece, one end of the guide piece is provided with an abutting end which is located away from the groove opening; the guide piece has an inclined guide surface, and the height of the guide surface decreases in the direction away from the abutting end; the clamping piece is provided with a matching groove, and the guide piece is embedded in the matching groove; the cover body further comprises at least one butt joint piece which is protruded on the side of the cover wall facing the mounting cavity, and the shell is correspondingly provided with a butt joint position; when the cover body is connected with the shell, the butt joint piece is embedded in the butt joint position.

[0011] According to an embodiment of the utility model, the switch assembly comprises an adjusting assembly and a reaction assembly; the adjusting assembly comprises an adjusting piece and an elastic piece, the adjusting piece penetrates into the mounting cavity from the bottom of the shell, and the adjusting piece is movably connected with the shell through a threaded structure; the elastic piece has an adjusting end and a movable end, the adjusting end is clamped on the adjusting piece, the adjusting end can move along the vertical direction with the adjusting piece, and the movable end is connected with the reaction assembly; part of the reaction assembly is located in the mounting cavity, and another part of the reaction assembly penetrates out of the shell.

[0012] According to an embodiment of the utility model, the reaction assembly comprises a first lead-through piece, a second lead-through piece, a bimetallic strip, a first contact and a second contact; the first lead-through piece has oppositely arranged first conductive ends and a first connecting end; the second lead-through piece has oppositely arranged second conductive ends and a second connecting end, the first lead-through piece and the second lead-through piece are arranged at intervals, and the first connecting end and the second connecting end penetrate out of the bottom surface of the shell; the bimetallic strip has a fixed end and a free end, the fixed end is connected with the conductive end of the first lead-through piece, and the first contact is arranged on the free end; the second contact is arranged on the second conductive end, and the first contact and the second contact can be connected or disconnected with each other; the movable end is connected with the free end, and the free end can be elastically moved relative to the fixed end; the button is connected with the free end.

[0013] According to an embodiment of the utility model, the switch assembly further comprises a state display lamp, the reaction assembly further comprises a third lead-through piece, the third lead-through piece is arranged on one side of the second lead-through piece, and the second lead-through piece is located between the first lead-through piece and the third lead-through piece; the state display lamp has a positive electrode lead and a negative electrode lead, the positive electrode lead of the state display lamp is connected with the second lead-through piece, and the negative electrode lead of the state display lamp is connected with the conductive end of the third lead-through piece.

[0014] According to an embodiment of the utility model, button includes body, two pivot joints, a linkage and a connecting rod, two pivot joints are separately arranged on the both sides of body, one end of linkage is connected to body, its other end is protruding downward, and the end of linkage away from body is connected with connecting rod, the other end of linkage is connected with reaction assembly, two pivot holes are arranged correspondingly at opening, each pivot joint is connected with a pivot hole.

[0015] According to an embodiment of the utility model, the movable end of elastic piece is provided with a clamping port, the free end of bimetallic strip is formed with a clamping part, and the clamping part is inserted into the clamping port.

[0016] According to an embodiment of the utility model, including shell, two switch assemblies, a button and two covers, the inside of shell is divided into two installation cavities, the top surface of shell has an opening, and the opening is communicated with two installation cavities respectively, each installation cavity is provided with a switch assembly, the button is pivotally arranged in the opening, the button is connected with two switch assemblies respectively, and the on-off state of two switch assemblies is controlled simultaneously, the opposite sides of shell are provided with cavities, and each cavity is provided with a cover.

[0017] According to an embodiment of the utility model, two auxiliary heating assemblies are further included, and the two auxiliary heating assemblies are separately arranged in the two installation cavities, and each auxiliary heating assembly is connected with a switch assembly.

[0018] The utility model discloses beneficial effects lie in that connecting piece, clamping piece and docking piece are arranged on the cover wall, and clamping position, buckling groove and docking position are arranged on the shell correspondingly. When connecting, connecting piece abuts against clamping position, clamping piece buckles with buckling groove, and docking piece is embedded in docking position correspondingly, so that the cover and the shell are accurately matched and connected in multiple directions, the fastening degree of the connection between the cover and the shell is improved, and the cover is convenient to disassemble and assemble. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, and the illustrative embodiments and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0020] Figure 1 It is the connection schematic view of the cover and the shell in embodiment one.

[0021] Figure 2 It is the internal schematic view of the overcurrent protection switch in embodiment one.

[0022] Figure 3 It is the explosion view of the cover and the shell in embodiment one.

[0023] Figure 4 It is the cover connection schematic view in embodiment one.

[0024] Figure 5 The bottom view of the over-current protection switch in Example 1;

[0025] Figure 6 The exploded view of the over-current protection switch in Example 1;

[0026] Figure 7 The enlarged view of A in Example 1;

[0027] Figure 8 The schematic view of the reaction assembly in Example 1;

[0028] Figure 9 The schematic view of the bimetallic strip in Example 1;

[0029] Figure 10 The schematic view of the traditional bimetallic strip;

[0030] Figure 11 The schematic view of the connecting rod in Example 1;

[0031] Figure 12 The exploded view of the over-current protection switch in Example 2;

[0032] Figure 13 The schematic view of the switch assembly in Example 2;

[0033] Figure 14 The exploded view of the over-current protection switch in Example 3.

[0034] Reference sign explanation

[0035] 1 - housing; 10 - mounting cavity; 11 - opening; 111 - pivoting hole; 12 - cavity opening; 121 - clamping position; 13 - buckling groove; 131 - slot; 132 - guide; 1321 - abutting end; 1322 - guide surface; 14 - abutting position;

[0036] 2 - switch assembly; 21 - adjusting assembly; 211 - adjusting member; 2111 - adjusting position; 212 - elastic member; 2121 - adjusting end; 2122 - movable end; 2123 - clamping interface; 22 - reaction assembly; 221 - first conducting member; 2211 - first conducting end; 2212 - first connecting end; 222 - second conducting member; 2221 - second conducting end; 2222 - second connecting end; 223 - bimetallic strip; 2231 - fixed end; 2232 - free end; 2233 - clamping portion; 224 - first contact; 225 - second contact; 226 - third conducting member;

[0037] 3 - button; 30 - body; 31 - pivoting member; 32 - linkage; 33 - connecting rod; 331 - clamping hook;

[0038] 4 - cover; 40 - cover wall; 41 - connecting piece; 42 - clamping piece; 420 - mating groove; 43 - counter piece;

[0039] 5 - status display lamp;

[0040] 6 - auxiliary heating assembly; 61 - lead-through tab; 62 - heating wire. DETAILED DESCRIPTION

[0041] In the following, a plurality of embodiments of the present application will be disclosed with reference to the drawings. For the purpose of clear illustration, a plurality of practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the present application. That is, in some embodiments of the present application, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0042] In addition, in the present application, the description such as "first", "second", etc. is only for the purpose of description, and does not mean to particularly indicate the order or sequence, nor to limit the present application. It is merely for the purpose of distinguishing components or operations described by the same technical terms, and should not be understood as indicating or implying the relative importance of the technical features indicated or the number of technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the present application.

[0043] Embodiment one

[0044] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic view of the connection between the cover and the shell, Figure 2 is a schematic view of the internal structure of the overcurrent protection switch in the present embodiment. The present application provides an overcurrent protection switch, which comprises a shell 1, at least one group of switch assemblies 2, a button 3 and at least one cover 4. The interior of the shell 1 is formed with a mounting cavity 10, and an opening 11 is formed in the top surface of the shell 1, and the opening 11 is in communication with the mounting cavity 10. The at least one switch assembly 2 is mounted in the mounting cavity 10, and the button 3 is pivotally connected to the opening 11 of the shell 1, and the button 3 is connected to each group of switch assemblies 2. In use, the switch state of the switch assembly 2 can be controlled by rotating the button 3. At least one cavity opening 12 is formed in one side of the shell 1, and the cavity opening 12 is in communication with the mounting cavity 10. The cover 4 is arranged at the cavity opening 12. When the cover 4 is connected to the shell 1, the cover 4 is arranged at the cavity opening 12, so that the mounting cavity 10 is closed.

[0045] The overcurrent protection switch in the embodiment has a set of switch components 2 and a cover 4. The housing 1 has a mounting cavity 10 formed inside, the switch components 2 are arranged in the mounting cavity 10, and the housing 1 has a cavity opening 12 formed on one side and communicating with the mounting cavity 10. The cover 4 is arranged on the cavity opening 12 to cover the mounting cavity 10. The cover 4 is movably connected with the housing 1. During assembly, the switch components 2 can be inserted into the mounting cavity 10 from the cavity opening 12, thereby facilitating the installation of the switch components 2. After the installation of the switch components 2 is completed, the cover 4 is arranged on the cavity opening 12 to close the mounting cavity 10.

[0046] Please refer to Figure 1 , Figure 3 and Figure 4 , Figure 3 is an exploded view of the cover and the housing, Figure 4 is a connection diagram of the cover. To realize the connection between the cover 4 and the housing 1, the inner wall of the cavity opening 12 of the housing 1 is provided with a clamping position 121. The cover 4 includes a cover wall 40 and at least one connecting piece 41. The connecting piece 41 is arranged on the edge of the cover wall 40, and the connecting piece 41 can be abutted in the clamping position 121, so that one side edge of the cover 4 is connected with the housing 1, and the side of the cover 4 away from the connecting piece 41 can be close to or away from the housing 1. During connection, the connecting piece 41 is abutted in the clamping position 121, and the cover 4 and the housing 1 are rotationally connected with the clamping position 121 as the pivot.

[0047] In the embodiment, the cover 4 has two connecting pieces 41 arranged at intervals on the edge of the cover 4. By increasing the number of connecting pieces 41, the connection between the cover 4 and the housing 1 is more stable and firm.

[0048] Please refer to Figures 1-5 , Figure 5 is a bottom view of the overcurrent protection switch. In addition, the bottom surface of the housing 1 is provided with at least one buckling groove 13, and the end of the buckling groove 13 close to the cover 4 is provided with a groove opening 131. The cover 4 further includes at least one clamping piece 42 connected to the side of the cover wall 40 opposite to the connecting piece 41, and the clamping piece 42 extends from the bottom of the cover wall 40 to the front side, so that the clamping piece 42 and the cover wall 40 have an included angle matched with the housing 1. The number of the clamping pieces 42 is matched with the number of the buckling grooves 13, and the clamping pieces 42 are matched with the buckling grooves 13. When the cover 4 is arranged on the cavity opening 12, the clamping pieces 42 are inserted into the buckling grooves 13 and are embedded in the buckling grooves 13, and the groove opening 131 is used to prevent the clamping pieces 42 from interfering with the housing 1.

[0049] In the embodiment, the bottom surface of the housing 1 is provided with two buckling grooves 13 arranged at intervals, and the cover 4 is provided with two clamping pieces 42 arranged at intervals. During connection, each clamping piece 42 is embedded in a buckling groove 13.

[0050] Further, to prevent the cover 4 from being detached from the shell 1, a guide 132 is arranged in each buckle groove 13. The guide 132 has an abutting end 1321 located at an end away from the notch 131. The guide 132 has an inclined guide surface 1322 gradually away from the abutting end 1321, and the height of the guide surface 1322 gradually decreases. The guide surface 1322 is used to avoid interference between the clamping piece 42 and the guide 132 when the cover 4 is connected with the shell 1. The clamping piece 42 is provided with a matching groove 420 adapted to the guide 132. When the cover 4 is connected with the shell 1, the guide 132 is embedded in the matching groove 420. The abutting end 1321 of the guide 132 abuts against the matching groove 420. When an outward force is applied to the cover 4, the abutting end 1321 of the guide 132 blocks the outward movement of the guide 132, thereby preventing the cover 4 from falling off.

[0051] Please refer to Figures 2-3 . Further, to prevent the cover 4 from falling off due to gravity, the cover 4 further comprises at least one docking piece 43 protruding from a side of the cover wall 40 facing the mounting cavity 10. The shell 1 is correspondingly recessed to form a docking site 14. When the cover 4 is arranged on the shell 1, the docking piece 43 is embedded in the docking site 14.

[0052] In this embodiment, the shell 1 is provided with two docking sites 14 arranged on two sides of the mounting cavity 10. The cover wall 40 is correspondingly provided with two docking pieces 43, each of which is adapted to one of the docking sites 14. When the cover 4 is connected with the shell 1, the docking piece 43 extends into the docking site 14 to provide support for the cover 4, preventing the cover 4 from being detached from the shell 1 due to gravity.

[0053] In the assembly process, the connecting piece 41 of the cover 4 is inserted into the clamping site 121, so that the cover 4 is connected with the shell 1. Then, the cover wall 40 is rotated about the connecting piece 41, so that the docking piece 43 extends into the docking site 14, the clamping piece 42 extends into the buckle groove 13, and the guide 132 is embedded in the matching groove 420, thereby completing the connection between the cover 4 and the shell 1. When the cover 4 needs to be disassembled, a force is applied to the connecting piece 41, so that the cover wall 40 is rotated about the connecting piece 41 in a direction away from the shell 1, so that the connecting piece 41 is detached from the matching groove 420 and the docking piece 43 is detached from the docking site 14. Then, the connecting piece 41 is detached from the clamping site 121, so that the cover 4 can be disassembled. Compared with the traditional connection mode of the cover 4 and the shell 1, the connection mode adopted in this embodiment is quick and convenient, and the connection is stable, which facilitates the disassembly and assembly of the cover 4.

[0054] Please refer to Figure 2 and combine with Figures 6-8 , Figure 6 is an exploded view of the overcurrent protection switch in this embodiment,Figure 7 is an enlarged view of A, Figure 8 is a schematic view for showing the reaction assembly. Further, the switch assembly 2 comprises an adjusting assembly 21 and a reaction assembly 22. The adjusting assembly 21 comprises an adjusting member 211 and an elastic member 212. The adjusting member 211 penetrates into the housing 1 from the bottom of the housing 1 and is movably connected to the housing 1 by a threaded structure. The position of the adjusting member 211 can be changed by screwing the adjusting member 211. The elastic member 212 has an adjusting end 2121 and a movable end 2122. The adjusting end 2121 of the elastic member 212 is clamped on the adjusting member 211. When the adjusting member 211 is screwed, the adjusting end 2121 of the elastic member 212 moves along the vertical direction with the adjusting member 211. The movable end 2122 of the elastic member 212 is connected to the reaction assembly 22. The elastic member 212 can provide elastic force to the reaction assembly 22, thereby assisting the reaction assembly 22 to flip. Part of the reaction assembly 22 is located in the mounting cavity 10, and the other part penetrates out of the housing. The part of the reaction assembly 22 located in the mounting cavity 10 is connected to the elastic member 212.

[0055] In this embodiment, the elastic member 212 is a spring made of SUS material. According to the characteristics of the elastic member 212, the elastic potential energy increases with the compression degree. Therefore, when the movable end 2122 of the elastic member 212 is fixed, the elastic member 212 can change the elastic force acting on the reaction assembly 22 by changing the horizontal height of the adjusting end 2121, so that the rebound position of the movable end 2122 of the elastic member 212 changes, and the compression degree of the elastic member 212 changes.

[0056] When it is necessary to prolong the flipping time of the reaction assembly 22, the position of the adjusting end 2121 of the elastic member 212 is raised, so that the rebound position of the movable end 2122 of the elastic member 212 is raised, the deformation of the elastic member 212 is reduced, and the elastic force of the elastic member 212 is reduced. When overcurrent occurs, the reaction assembly 22 needs to increase the deformation degree to make the movable end 2122 of the elastic member 212 rebound. Thus, the reaction tripping time of the overcurrent protection switch is prolonged by prolonging the deformation time of the reaction assembly 22, so that the overcurrent protection switch is disconnected after prolonging the time according to the distance by which the adjusting member 211 is raised after overcurrent occurs. Thus, the effect of breaking the circuit is achieved.

[0057] When the reaction component 22 needs to be shortened, the position of the adjusting end 2121 of the elastic member 212 is lowered, so that the rebound position of the active end 2122 of the elastic member 212 is lowered, and the deformation degree of the elastic member 212 is increased, so that the elastic force of the elastic member 212 is increased. When overcurrent occurs, the deformation degree of the reaction component 22 is also reduced, so that the active end 2122 of the elastic member 212 rebounds, and the elastic force of the elastic member 212 acting on the reaction component 22 is increased, thereby assisting the reaction component 22 to quickly jump, so that the overcurrent protection switch quickly trips when overcurrent occurs, thereby playing a protection effect.

[0058] In this way, by changing the position of the adjusting member 212 in the vertical direction, the position of the adjusting end 2121 of the elastic member is changed, so that the rebound position of the active end 2122 of the elastic member 212 is changed. Since the active end 2122 of the elastic member 212 is connected to the reaction component 22, the deformation degree of the reaction component 22 when the reaction component 22 is flipped changes with the rebound position of the active end 2122. When the rebound position of the active end 2122 is high, the deformation degree of the reaction component 22 when the reaction component 22 is flipped is large, that is, the deformation time of the reaction component 22 is long; when the rebound position of the active end 2122 is low, the deformation degree of the reaction component 22 when the reaction component 22 is flipped is reduced, that is, the deformation time of the reaction component 22 is shortened. Therefore, by setting the adjusting assembly 21, the deformation time of the reaction component 22 is changed, so that the overcurrent protection switch can adjust the reaction time according to the use requirement.

[0059] In this embodiment, the adjusting member 211 has an adjusting position 2111, the adjusting end 2121 of the elastic member 212 is clamped in the adjusting position 2111, and the active end 2122 of the elastic member 212 is connected to the reaction component 22. By screwing the adjusting member 211, the height of the adjusting position 2111 is changed, so that the center of gravity of the adjusting end 2121 of the elastic member 212 clamped in the adjusting position 2111 is different, thereby changing the rebound position of the elastic member 212.

[0060] Please refer to Figure 6 and Figure 9 , Figure 9 is a schematic view of a bimetallic strip. Further, in order to facilitate the connection of the elastic member 212 and the bimetallic strip 223, the active end 2122 of the elastic member 212 is provided with a clamping port 2123, and the free end 2232 of the bimetallic strip 223 is formed with a clamping portion 2233. When the elastic member 212 is connected to the bimetallic strip 223, the clamping portion 2233 is inserted into the clamping port 2123.

[0061] Please refer to Figure 10 , Figure 10It is to be noted that in the connection mode of the conventional elastic member and the bimetallic strip, the end of the clamping portion 2233 is usually designed as a "T" shape to prevent the clamping portion 2233 from being detached from the clamping interface 2123. However, this structure needs to be installed manually by hand, and therefore, in order to improve the automatic assembly of the overload protection switch, the end of the clamping portion 2233 of the bimetallic strip 223 is designed as a semicircle to facilitate the insertion of the clamping portion 2233 into the clamping interface 2123. In the assembly, the clamping portion 2233 is connected to the movable end 2122 of the elastic member 212 by a straight insertion, and the automatic equipment can be used to position and connect the clamping portion 2233 and the clamping interface 2123, without the need of manually connecting the bimetallic strip 223 and the elastic member 212, which greatly improves the assembly efficiency of the overload protection switch.

[0062] Please refer to Figure 6 and Figure 8 Further, the button 3 comprises a body 30, two pivot members 31, a linkage member 32 and a connecting rod 33. The two pivot members 31 are arranged on opposite sides of the body 30. One end of the linkage member 32 is connected to the bottom of the body 30, and the other end of the linkage member 32 is connected to the connecting rod 33. The end of the connecting rod 33 away from the linkage member 32 is connected to the reaction assembly 22. Two pivot holes 111 are arranged on the opening 11 of the shell 1, and each pivot member 31 is arranged in a pivot hole 111 during installation. When the body 30 is rotated by a certain angle through the two pivot members 31, the linkage member 32 is swung, and the connecting rod 33 is displaced in the vertical direction, and at the same time, the connecting rod 33 drives the reaction assembly 22 to be disconnected or attracted, thereby changing the use state of the overload protection switch.

[0063] Please refer to Figure 11 , Figure 11 The connecting rod is shown in the figure. In this embodiment, the two ends of the connecting rod 33 are respectively provided with hooks 331. During connection, one hook 331 is hooked on the linkage member 32, and the other hook 331 is hooked on the reaction assembly 22, so that the linkage member 32 is drivingly connected to the reaction assembly 22 through the connecting rod 33.

[0064] In this embodiment, the overload protection switch has two use states of "RESET" and "OFF", and the two use states correspond to different positions of the button 3. When the overload protection switch is switched to the "RESET" state, the linkage member 32 is pressed down by the body 30, the linkage member 32 drives the connecting rod 33 to move downward to trigger the reaction assembly 22; when the overload protection switch is switched to the "OFF" state, the linkage member 32 is lifted up by the body 30, the linkage member 32 drives the connecting rod 33 to move upward to disconnect the reaction assembly 22.

[0065] Please refer toFigure 6 and Figure 8 Further, each reaction component 22 includes a first lead 221, a second lead 222, a bimetallic strip 223, a first contact 224 and a second contact 225. The first lead 221 has a first conductive end 2211 and a first connecting end 2212 oppositely arranged, and the second lead 222 has a second conductive end 2221 and a second connecting end 2222 oppositely arranged. In installation, the first lead 221 and the second lead 222 are installed at intervals in the housing 1, and the first connecting end 2212 and the second connecting end 2222 both pass through the bottom of the housing 1, facilitating the connection of the electric wire. The bimetallic strip 223 has a fixed end 2231 and a free end 2232, wherein the fixed end 2231 of the bimetallic strip 223 is connected to the first conductive end 2211, so that the fixed end 2231 of the bimetallic strip 223 remains fixed relative to the housing 1. The free end 2232 of the bimetallic strip 223 is elastic relative to the fixed end 2231. The first contact 224 is connected to the free end 2232 of the bimetallic strip 223, and the second contact 225 is connected to the second conductive end 2221. The first contact 224 and the second contact 225 can be attracted to each other to be connected or disconnected. The free end 2232 of the bimetallic strip 223 is also connected to the movable end 2122 of the elastic member 212, and the movable end 2122 of the elastic member 212 provides elastic support for the bimetallic strip 223. The button 3 is connected to the free end 2232 of the bimetallic strip 223, and by actuating the button 3, the free end 2232 of the bimetallic strip 223 is moved in the vertical direction, so that the second contact 225 connected to the free end 2232 and the first contact 224 are attracted and separated.

[0066] In actual application, the main body 30 is rocked, the linkage 32 is rocked along with the main body 30, the linkage 32 drives the connecting rod 33 to rock, the connecting rod 33 drives the free end 2232 of the bimetallic strip 223 to move downward, so that the first contact 224 is in contact with the second contact 225, at this time, the first lead 221 and the second lead 222 are conducted through the bimetallic strip 223, at this time, the overcurrent protection switch is in a conducting state. If overcurrent occurs, the bimetallic strip 223 is deformed by heat, the free end 2232 thereof is turned upward, the pressure of the active end 2122 of the elastic element 212 is reduced, the elastic potential energy of the elastic element 212 is converted into kinetic energy, the active end 2122 of the elastic element 212 pushes away the free end 2232 of the bimetallic strip 223, so as to assist the bimetallic strip 223 to quickly turn over, so that the first contact 224 and the second contact 225 are separated from each other, the first lead 221 and the second lead 222 cannot be conducted through the bimetallic strip 223, and the overcurrent protection switch is in a non-conducting state. After the bimetallic strip 223 is turned over, the active end 2122 of the elastic element 212 is higher than the adjusting end 2121 thereof, so that the elastic element 212 supports the free end 2232 of the bimetallic strip 223, to prevent the bimetallic strip 223 from jumping back to the original position, so as to achieve the effect of keeping the overcurrent protection switch in a non-conducting state after being turned off. In addition, the connecting rod 33 and the linkage 32 of the button 3 are rocked along with the free end 2232 of the bimetallic strip 223, so that the button 3 is switched to the OFF position. At this time, the overcurrent protection switch is in a non-conducting state, thereby achieving the effect of overcurrent protection.

[0067] When it is needed to prolong the tripping time of the overcurrent protection switch, the adjusting element 211 is screwed, so that the adjusting end 2121 of the elastic element 212 moves upward in the vertical direction, at this time, the deformation of the elastic element 212 is reduced, and the rebound position of the active end 2122 of the elastic element 212 is higher. When overcurrent occurs, the bimetallic strip 223 is deformed by heat, when the deformation degree of the bimetallic strip 223 reaches the rebound position of the active end 2122 of the elastic element 212, the active end 2122 of the elastic element 212 rebounds, to provide a force to the free end 2232 of the bimetallic strip 223, to assist the bimetallic strip 223 to turn over. Therefore, after the adjusting end 2121 of the elastic element 212 is moved upward, the deformation degree of the bimetallic strip 223 needs to be increased to make the elastic element 212 rebound, thereby prolonging the deformation time of the bimetallic strip 223, so that the overcurrent protection switch is turned off for a prolonged time after overcurrent occurs.

[0068] When the tripping time of the over-current protection switch needs to be shortened, the adjusting member 212 is screwed so that the adjusting end 2121 of the elastic member 212 moves downward in the vertical direction, at this time, the deformation of the elastic member 212 becomes larger, and the rebound position of the active end 2122 of the elastic member 212 becomes lower. When over-current occurs, the bimetallic strip 223 is deformed by heat, when the bimetallic strip 223 is deformed, the free end 2232 thereof is lifted, when the free end 2232 reaches the rebound position of the active end 2122 of the elastic member 212, the active end 2122 of the elastic member 212 rebounds to provide a force to the free end of the bimetallic strip 223, assisting the bimetallic strip 223 to quickly flip. After the adjusting end 2121 of the elastic member 212 is moved downward, the degree of deformation of the bimetallic strip 223 is reduced, and the elastic member 212 also rebounds, thereby shortening the deformation time of the bimetallic strip 223, so that the over-current protection switch quickly trips off after over-current occurs.

[0069] In addition, the over-current protection switch in the embodiment can also be used as a general switch. When it is needed to turn on the circuit, the button 3 is turned to the RESET position, the button 3 drives the free end 2232 of the bimetallic strip 223 to move downward, so that the first contact 224 and the second contact 225 are attracted, and the elastic member 212 is pressed. At this time, the second lead 222 and the first lead 221 are conducted through the bimetallic strip 223, and the over-current protection switch is in the on state.

[0070] When it is needed to turn off the circuit, the button 3 is turned to the OFF position, the button 3 drives the free end 2232 of the bimetallic strip 223 to move upward, so that the first contact 224 and the second contact 225 are separated, and the elastic member 212 is supported on the free end 2232 of the bimetallic strip 223. At this time, the first lead 221 and the second lead 222 cannot be conducted, and the over-current protection switch is in the off state.

[0071] Please refer to Figure 2 and Figure 8 In addition, the over-current protection switch in the embodiment also includes a state display lamp 5. The switch assembly 2 in the embodiment also includes a third lead 226 for connecting the state display lamp 5. The third lead 226 is arranged on one side of the second lead 222, so that the second lead 222 is arranged between the first lead 221 and the second lead 222.

[0072] The state display lamp 5 has a positive pin and a negative pin, the positive pin is connected with the second conductor 222, and the negative pin is connected with the third conductor 226. The state display lamp 5 is used for displaying the opening and closing states of the overcurrent protection switch. When the overcurrent protection switch is in the opening state, the first conductor 221 and the second conductor 222 are conducted through the bimetallic strip 223, so that the positive pin and the negative pin of the state display lamp 5 form a loop, thereby the state display lamp 5 is lighted; when the overcurrent protection switch is in the closing state, the first conductor 221 and the second conductor 222 are not conducted, the positive pin of the state display lamp 5 is not electrified, and the state display lamp 5 cannot be lighted. Therefore, the lighted or unlighted state of the state display lamp 5 can represent the use state of the overcurrent protection switch.

[0073] Embodiment two

[0074] Please refer to Figures 12-13 , Figure 12 The exploded view of the overcurrent protection switch in the embodiment, Figure 13 The schematic view of the switch assembly in the embodiment. The overcurrent protection switch in the embodiment includes a housing 1, two groups of switch assemblies 2, a button 3 and two covers 4. The inside of the housing 1 is divided into two installation cavities 10. The top surface of the housing 1 is provided with an opening 11, and the opening 11 is in communication with the two installation cavities 10 respectively. Each group of switch assemblies 2 is arranged in one installation cavity 10, so that the two groups of switch assemblies 2 are symmetrically arranged on the two sides of the inside of the housing 1. The button 3 is arranged at the opening 11, and the button 3 is connected with the two groups of switch assemblies 2 respectively, and simultaneously controls the opening or closing state of the two groups of switch assemblies 2, so that the overcurrent protection switch in the embodiment can be applied to a double circuit.

[0075] In the actual application scene, one group of switch assemblies 2 is connected with the live wire, and the other group of switch assemblies 2 is connected with the zero line. The two groups of switch assemblies 2 can be simultaneously controlled through the button 3, so that the overcurrent protection switch in the embodiment can simultaneously control the live wire and the zero line.

[0076] In addition, the button 3 in the embodiment includes a body 30, two pivot connectors 31, two linkage members 32 and two connecting rods 33. The two pivot connectors 31 are arranged on the two sides of the body 30, and the body 30 is connected with the opening 11 of the housing 1 through the pivot connectors 31. The two linkage members 32 are connected with the bottom of the body 30, and the two linkage members 32 are symmetrically arranged with A-A' as the axis. Each connecting rod 33 is connected with one linkage member 32, and the end of the connecting rod 33 away from the linkage member 32 is connected with the reaction assembly 22, that is, each connecting rod 33 separately controls the opening and closing state of one group of reaction assemblies 22.

[0077] When the button 3 is pushed, the body 30 swings the two linkage members 32 and the two connecting rods 33, so that the body 30 can control the opening and closing of the two groups of switch assemblies 2.

[0078] The switch assembly 22 in the present embodiment is different from that in the first embodiment in that each group of switch assemblies 22 in the present embodiment comprises a first contact member 221 and a second contact member 222. The first contact member 221 and the second contact member 222 are arranged in parallel, and the connecting ends of the two members pass through the bottom of the shell 1. The first contact 224 is mounted on the conductive end of the second contact member 222, and the free end 2232 of the bimetallic strip 223 is mounted on the first contact 224. The fixed end 2231 of the bimetallic strip 223 is fixedly connected to the conductive end of the first contact member 221. One end of the elastic member 212 is fixedly connected to the shell 1, and the other end is connected to the free end 2232 of the bimetallic strip 223.

[0079] In the present embodiment, the positive pin of the status display lamp 5 is connected to the second contact member 222 of one of the two groups of switch assemblies 2, and the negative pin of the status display lamp 5 is connected to the second contact member 222 of the other group of switch assemblies 2. In actual use, the two groups of switch assemblies 2 are connected to the live wire and the neutral wire respectively. When the current is too large, the second contact member 222 connected to the live wire conducts current to the second contact 225, and the switch assembly 2 connected to the live wire is disconnected, driving the button 3 to swing. At the same time, the button 3 drives the switch assembly 2 connected to the neutral wire to be disconnected, thereby achieving the effect of double power supply disconnection.

[0080] Embodiment Three

[0081] Please refer to Figure 14 , Figure 14 The exploded view of the overcurrent protection switch in the present embodiment. The present embodiment is different from the second embodiment in that the present embodiment further comprises two groups of auxiliary heating assemblies 6. The two groups of auxiliary heating assemblies 6 are arranged in the two mounting cavities 10, and each auxiliary heating assembly 6 is connected to a group of switch assemblies 2. The auxiliary heating assembly 6 is used to increase the amount of heat, so that the switch assembly 6 can achieve disconnection in a low-current circuit.

[0082] In the present embodiment, the auxiliary heating assembly 6 comprises a contact piece 61 and a heating wire 62. The contact piece 61 is arranged on one side of the second contact member 222, and the second contact 225 is riveted to the contact piece 61. One end of the heating wire 62 is connected to the conductive end of the second contact member 222, and the other end is connected to the contact piece 61. By arranging the auxiliary heating assembly 6, the overcurrent protection switch in the present embodiment can be used in a low-current circuit below 3 amperes.

[0083] In actual use, the electric wire is connected to the second lead 222, the current passes through the heating wire 62 to increase the heating amount, and then is conducted to the lead tab 61, and is conducted to the first contact 224 through the second contact 225 on the lead tab 61. When the current exceeds the set current, the expansion temperature of the bimetallic strip 223 is reached, the bimetallic strip 223 is deformed, and the action force generated by the elastic member 212 on the bimetallic strip 223 makes the free end 2232 of the bimetallic strip 223 quickly flip, so that the first contact 224 is separated from the second contact 225. Thus, by arranging the auxiliary heating assembly 6, the small current can also make the overcurrent protection switch open, so that the overcurrent protection switch can control the circuit of the small current.

[0084] The above merely describes the implementation manners of the present application and is not intended to limit the present application. The present application can be modified and changed in various ways by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. An overcurrent protection switch, characterized in that, include: The housing (1) has a mounting cavity (10) formed inside it, and the top surface of the housing (1) has an opening (11) that communicates with the mounting cavity (10). At least one switch assembly (2) is disposed within the mounting cavity (10); A button (3) is pivotally mounted in the opening (11) and connected to each of the switch components (2) to switch the on and off states of the switch components (2); and At least one cover (4) is provided, and a cavity (12) is opened on at least one side of the housing (1). Each cavity (12) is provided with a cover (4), and the cover (4) is placed on the cavity (12). The inner wall of the cavity (12) forms a snap-fit ​​position (121). The cover (4) includes a cover wall (40) and at least one connector (41), and the connector (41) is provided on the edge of the cover wall (40). When the cover wall (40) is connected to the housing (1), The connector (41) abuts against the snap-fit ​​position (121); the bottom of the housing (1) is provided with at least one snap-fit ​​groove (13), and each snap-fit ​​groove (13) has a slot (131) at one end near the cover (4); the cover (4) also includes at least one snap-fit ​​member (42), the snap-fit ​​member (42) is provided on the side of the cover wall (40) opposite to the connector (41), and when the cover wall (40) is connected to the housing (1), each snap-fit ​​member (42) abuts against the connector (41). It should pass through one of the slots (131) and fit into the fastening groove (13); each of the fastening grooves (13) is provided with a guide (132), one end of the guide (132) forming an abutment end (1321), the abutment end (1321) being located at the end away from the slot (131); the guide (132) has an inclined guide surface (1322), the height of the guide surface (1322) decreasing along the direction away from the abutment end (1321); The snap-fit ​​member (42) has a mating groove (420), and the guide member (132) is fitted into the mating groove (420); the cover (4) also includes at least one docking member (43), the docking member (43) protrudes from the side of the cover wall (40) facing the mounting cavity (10), and the housing (1) is correspondingly recessed with a docking position (14); when the cover (4) is connected to the housing (1), the docking member (43) is fitted into the docking position (14).

2. The overcurrent protection switch according to claim 1, characterized in that, The switching assembly (2) includes an adjustment assembly (21) and a reaction assembly (22); the adjustment assembly (21) includes an adjustment member (211) and an elastic member (212), the adjustment member (211) passes through the bottom of the housing (1) into the mounting cavity (10), and the adjustment member (211) is movably connected to the housing (1) through a threaded structure; the elastic member (212) has an adjustment end (2121) and a movable end (2122), the adjustment end (2121) is engaged with the adjustment member (211), the adjustment end (2121) can move vertically with the adjustment member (211), and the movable end (2122) is connected to the reaction assembly (22); a part of the reaction assembly (22) is located in the mounting cavity (10), and the other part of the reaction assembly (22) extends out of the housing (1).

3. The overcurrent protection switch according to claim 2, characterized in that, The reaction assembly (22) includes a first conductive member (221), a second conductive member (222), a bimetallic strip (223), a first contact (224), and a second contact (225); the first conductive member (221) has a first conductive end (2211) and a first connecting end (2212) disposed opposite to each other; the second conductive member (222) has a second conductive end (2221) and a second connecting end (2222) disposed opposite to each other, the first conductive member (221) and the second conductive member (222) are spaced apart, and the first connecting end (2212) and the second connecting end (2222) protrude from the bottom surface of the housing (1); The bimetallic strip (223) has a fixed end (2231) and a free end (2232). The fixed end (2231) is connected to the conductive end of the first conductor (221). The first contact (224) is located on the free end (2232). The second contact (225) is located on the second conductive end (2221). The first contact (224) and the second contact (225) can cooperate to connect or disconnect. The movable end (2122) is connected to the free end (2232). The free end (2232) can bounce relative to the fixed end (2231). The button (3) is connected to the free end (2232).

4. The overcurrent protection switch according to claim 3, characterized in that, It also includes a status indicator light (5), and the reaction component (22) further includes a third conductor (226), the third conductor (226) is disposed on one side of the second conductor (222), and the second conductor (222) is located between the first conductor (221) and the third conductor (226). The status indicator light (5) has a positive terminal and a negative terminal. The positive terminal of the status indicator light (5) is connected to the second conductor (222), and the negative terminal of the status indicator light (5) is connected to the conductive end of the third conductor (226).

5. The overcurrent protection switch according to claim 2, characterized in that, The button (3) includes a body (30), two pivots (31), a linkage (32), and a connecting rod (33); the two pivots (31) are respectively disposed on both sides of the body (30), one end of the linkage (32) is connected to the body (30), and the other end protrudes downward, and the end of the linkage (32) away from the body (30) is connected to the connecting rod (33), and the other end of the linkage (32) is connected to the reaction component (22); two pivot holes (111) are correspondingly provided at the opening (11), and each pivot (31) is connected to one of the pivot holes (111).

6. The overcurrent protection switch according to claim 3, characterized in that, The movable end (2122) of the elastic element (212) is provided with a card interface (2123), and the free end (2232) of the bimetallic strip (223) is formed with a card connector (2233), which is inserted into the card interface (2123).

7. The overcurrent protection switch according to claim 1, characterized in that, The device includes a housing (1), two switch assemblies (2), a button (3), and two covers (4). The housing (1) is divided into two mounting cavities (10). The top surface of the housing (1) has an opening (11) that communicates with the two mounting cavities (10). Each mounting cavity (10) contains one switch assembly (2). The button (3) is pivotally mounted in the opening (11) and is connected to the two switch assemblies (2) to control the on and off states of the two switch assemblies (2). The housing (1) has openings (12) on both sides. Each opening (12) is covered with a cover (4).

8. The overcurrent protection switch according to claim 7, characterized in that, It also includes two auxiliary heating components (6), which are respectively disposed in the two mounting cavities (10), and each auxiliary heating component (6) is connected to a switch component (2).

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