A circuit breaker device for instantaneous overload conditions
By using a single tension spring and a parallelogram connecting rod mechanism in the circuit breaker equipment, combined with the design of a spiral coil and a cylindrical magnet, rapid disconnection and reset in the instantaneous overload state is achieved, and overheating is prevented through the passive heat dissipation mechanism, solving the problem of circuit components damaged in the prior art circuit breaker equipment during instantaneous overload.
Patent Information
- Application Number
- CN202311577006.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-24
- Publication Date
- 2025-04-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When the existing circuit breaker equipment used in the instantaneous overload state is instantaneously overloaded, it takes a certain amount of time to heat and deformation of the bimetal plate, resulting in high current causing damage to the circuit components.
A single tension spring and parallelogram connecting rod mechanism are used, combined with a spiral coil and a cylindrical magnet, an overload reset mechanism is designed to achieve rapid disconnection and reset, and the arc extinguishing mechanism is prevented from overheating through a passive heat dissipation mechanism.
It realizes rapid disconnection and reset under instantaneous overload state, avoids damage to circuit components, and effectively prevents safety hazards caused by overheating of the arc extinguishing mechanism through the heat dissipation mechanism.
Smart Images
Figure CN119764130A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of circuit breakers, and in particular to a circuit breaker device used in an instantaneous overload state. Background Art
[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use.
[0003] The existing circuit breaker devices used for instantaneous overload conditions are mostly bimetallic strips with reset mechanisms. Bimetallic strips are a composite material composed of two or more metals or other materials with suitable properties. Bimetallic strips are also called thermal bimetallic strips. Due to the different thermal expansion coefficients of each component layer, when the temperature changes, the deformation of the active layer is greater than that of the passive layer, so the bimetallic strip as a whole will bend toward the passive layer, and the curvature of this composite material will change, resulting in deformation. When overloaded, the current increases, the heat generation increases, and the bimetallic strip deforms to a certain extent, pushing the reset mechanism, and the reset mechanism drives the live terminal to disconnect, thereby achieving circuit breaking.
[0004] There are some problems. In the instantaneous overload state, since it takes a certain amount of time for the bimetallic strip to heat up and deform, the high current of the instantaneous overload will cause damage to the components in the circuit. For this reason, we propose a circuit breaker device for instantaneous overload state. Summary of the invention
[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a circuit breaker device for instantaneous overload state. By using a single tension spring and a parallelogram linkage mechanism, in conjunction with a spiral coil and a cylindrical magnet, quick disconnection and resetting can be simply and effectively achieved, which can effectively solve the problems in the background technology.
[0006] To achieve the above object, the present invention provides the following technical solutions: a circuit breaker device for instantaneous overload state, comprising a protective shell, an overload reset mechanism, a switch self-locking mechanism and a heat dissipation mechanism; Protective shells: There are two of them, which are installed by cross-slot bolts and cap nuts. Mounting holes are provided in the middle of the upper end surfaces on both sides of the two protective shells, and mounting bolts are threadedly connected in the mounting holes. Wiring holes are provided in the middle of the left and right sides of the two protective shells, and the lower end outer sides of the mounting bolts in the two mounting holes are threadedly connected to wiring frames. The first wiring terminal and the second wiring terminal are respectively clamped on the left and right sides of the middle of the two protective shells, and the first wiring terminal and the second wiring terminal correspond to the positions of the two wiring frames respectively; Overload reset mechanism: it is arranged in the middle between the front and rear end surfaces of the two protective shells; Switch self-locking mechanism: it is arranged at the upper end between the front and rear end surfaces of the two protective shells; Heat dissipation mechanism: It is symmetrically arranged on the opposite outer sides of the two protective shells. It is used for circuit breaker equipment in instantaneous overload state. By using a single tension spring and a parallelogram connecting rod mechanism, it realizes quick disconnection and resetting simply and effectively. At the same time, the addition of a passive heat dissipation mechanism effectively prevents the safety hazard caused by overheating of the arc extinguishing mechanism.
[0007] Furthermore, the overload reset mechanism includes a limit frame and a spiral coil. The limit frames are respectively arranged on the left side of the middle of the relative inner side surfaces of the protective shell on the front and rear sides. The spiral coil is clamped between the two limit frames. The input end of the spiral coil is electrically connected to the output end of the first terminal through a wire, which is the active mechanism of the reset mechanism.
[0008] Furthermore, the overload reset mechanism also includes a cylindrical magnet, a first fixed column and a limit frame. The cylindrical magnet is slidably connected to the inner side of the spiral coil, the middle part of the right end face of the cylindrical magnet is fixedly connected to the first fixed column, the right end face of the first fixed column is fixedly connected to the limit frame, and the loosening mechanism of the reset mechanism.
[0009] Furthermore, the switch self-locking mechanism includes a paddle switch, a second fixed column, a rotating frame, a rotating shaft, a connecting frame and a conductive frame, the second fixed column is symmetrically connected to the left and right and is connected to the opposite inner side surfaces of the two protective shells, the paddle switch is fixedly connected to the middle of the outer side surface of the second fixed column on the left, the rotating frames are fixedly connected to the front and rear sides of the outer side surfaces of the two second fixed columns, the rotating shafts are rotatably connected between the two rotating frames corresponding to the front and rear positions, the connecting frame is rotatably connected between the outer side surfaces of the two rotating shafts, the conductive frame is fixedly connected to the outer side surface of the right end of the connecting frame, the left and right side surfaces of the conductive frame are respectively slidably connected to the left and right inner wall surfaces of the limit frame, the input end of the conductive frame is electrically connected to the output end of the spiral coil through a wire, and the switch self-locking mechanism is a driven mechanism.
[0010] Furthermore, the switch self-locking mechanism also includes a third fixed column, a tension spring and a support, the third fixed column is arranged on the upper left side between the relative inner sides of the two protective shells, the support is symmetrically arranged on the right side of the lower side of the outer side of the paddle switch, a limiting column is arranged between the two supports, and a tension spring and a self-locking mechanism are arranged between the outer side of the third fixed column and the outer side of the limiting column.
[0011] Furthermore, the heat dissipation mechanism includes an installation shaft, an installation positioning ring, a heat spreader and heat dissipation columns. The installation shaft is evenly arranged on the opposite outer sides of the two protective shells. The outer side surfaces of each installation shaft are slidably connected with an installation positioning ring. A heat spreader is arranged between four installation positioning rings on the same side. The outer side surfaces of the heat spreader are evenly distributed with heat dissipation columns, which is a passive heat dissipation mechanism.
[0012] Furthermore, the heat dissipation mechanism also includes a compression spring, a gasket and a butterfly nut. The butterfly nuts are respectively threadedly connected to the outer side surfaces of each mounting shaft. A gasket is arranged between each butterfly nut and the relative end surface of the corresponding mounting positioning ring. The gasket is slidably connected to the outer side surface of the mounting shaft. A compression spring is arranged between the gasket and the relative end surface of the corresponding mounting positioning ring. The compression spring is fixedly sleeved on the outer side surface of the mounting shaft, which is an installation element of the passive heat dissipation mechanism.
[0013] Furthermore, it also includes a retaining frame, which is clamped between the relative inner sides of the two protective shells, and arc extinguishing plates are clamped equidistantly above and below the relative inner sides of the retaining frame, and an arc-starting plate is clamped at the lower end between the relative inner sides of the retaining frame. Since the arc extinguishing plates adopt multiple breaks in series, the arc can be divided into multiple sections. Under the same contact stroke, the arc elongation speed and length are greater than those of a single break, thereby increasing the arc gap resistance. At the same time, the voltage applied to each break is reduced, which reduces the arc gap recovery voltage, thereby quickly extinguishing the arc.
[0014] Compared with the prior art, the beneficial effects of the present invention are: the circuit breaker device for instantaneous overload state has the following advantages: The staff installs the power cord in the installation hole by installing bolts respectively, and then pushes the paddle switch upward. The rotation of the paddle switch drives the limit column to rotate with the second fixed column as the center, thereby driving the tension spring to stretch, so that the direction of the torque of the tension spring on the paddle switch is reversed, thereby realizing self-locking. At the same time, the paddle switch rotates counterclockwise through the second fixed column to drive the rotating frame to rotate. The rotation of the rotating frame drives the third fixed column through the rotating shaft and the connecting frame to rotate with the second fixed column as the center and the rotating frame as the radius, thereby driving the conductive frame to approach the second terminal to realize the passage. At the same time, the conductive frame approaches the second terminal. Under the sliding restriction of the limit frame, the limit frame moves horizontally to the right through the first fixed column to drive the cylindrical magnet to move to the right. When a transient overload occurs in the circuit, the magnetic field generated by the large current through the spiral coil causes the cylindrical magnet to move to the left. The cylindrical magnet moves to the left and drives the limit frame to move to the left through the first fixed column. The limit frame moves to the left, thereby driving the conductive frame to reset. The conductive frame is reset, and the conductive frame and the second terminal are connected. An arc is generated at the contact point of the contactor. With the resetting of the conductive frame, the arc is generated from between the conductive frame and the second terminal to between the conductive frame and the arc-starting piece, and finally the arc is generated between the conductive frame and the arc-extinguishing piece. Since the arc-extinguishing piece adopts multiple fractures in series, the arc can be divided into multiple sections. Under the same contact stroke, the arc elongation speed and length are greater than those of a single fracture, thereby increasing the arc gap resistance. At the same time, the voltage applied to each fracture is reduced, so that the arc gap recovery voltage is reduced, thereby quickly extinguishing the arc. At the same time, the arc is extinguished, because the high current generates high heat through the arc-extinguishing piece during arc extinguishing, the high temperature heat is evenly transferred to each heat dissipation column under the action of the heat spreader to achieve heat dissipation. After resetting, the staff can control the circuit closure again through the toggle switch. The circuit breaker device used for instantaneous overload state realizes quick disconnection and resetting simply and effectively by using a single tension spring and a parallelogram linkage mechanism. At the same time, a passive heat dissipation mechanism is added to effectively prevent the safety hazard caused by overheating of the arc extinguishing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the heat dissipation mechanism of the present invention; Figure 3 It is a schematic diagram of the structure enlarged at A of the present invention; Figure 4 A front plan view schematic diagram of the internal parts of the present invention; Figure 5 It is a schematic cross-sectional view of the self-locking mechanism of the switch of the present invention.
[0016] In the figure: 1 protective shell, 2 mounting hole, 3 wiring hole, 4 wiring frame, 5 first wiring terminal, 6 second wiring terminal, 7 overload reset mechanism, 71 limit frame, 72 spiral coil, 73 cylindrical magnet, 74 first fixed column, 75 limit frame, 8 switch self-locking mechanism, 81 paddle switch, 82 second fixed column, 83 rotating frame, 84 rotating shaft, 85 connecting frame, 86 third fixed column, 87 tension spring, 88 support, 89 conductive frame, 9 heat dissipation mechanism, 91 mounting shaft, 92 mounting positioning ring, 93 soaking plate, 94 compression spring, 95 gasket, 96 butterfly nut, 97 heat dissipation column, 10 retaining frame, 11 arc extinguishing sheet, 12 arc starting sheet. Implementation
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] See also Figure 1-5 , This embodiment provides a technical solution: a circuit breaker device for instantaneous overload state, including a protective shell 1, an overload reset mechanism 7, a switch self-locking mechanism 8 and a heat dissipation mechanism 9; Protective shell 1: There are two of them. The two protective shells 1 are installed by cross-slot bolts and cap nuts. The middle of the upper end surfaces on the left and right sides of the two protective shells 1 are provided with mounting holes 2, and the mounting bolts are threadedly connected in the mounting holes 2. The middle of the left and right sides of the two protective shells 1 are provided with wiring holes 3. The lower end outer sides of the mounting bolts in the two mounting holes 2 are threadedly connected to the wiring frame 4. The left and right sides of the middle of the two protective shells 1 are respectively clamped with the first wiring terminal 5 and the second wiring terminal 6. The first wiring terminal 5 and the second wiring terminal 6 are respectively connected to the two The position of the wiring frame 4 corresponds to that of the wiring frame 4, and further includes a retainer 10, which is clamped between the opposite inner sides of the two protective shells 1, and arc extinguishing pieces 11 are clamped equidistantly between the opposite inner sides of the retainer 10, and arc striking pieces 12 are clamped at the lower end between the opposite inner sides of the retainer 10. Since the arc extinguishing pieces 11 are connected in series with multiple fractures, the arc can be divided into multiple sections. Under the same contact stroke, the arc elongation speed and length are greater than those of a single fracture, thereby increasing the arc gap resistance, and at the same time, the voltage applied to each fracture is reduced, so that the arc gap recovery voltage is reduced, thereby quickly extinguishing the arc; Overload reset mechanism 7: It is arranged in the middle between the front and rear end surfaces of the two protective shells 1. The overload reset mechanism 7 includes a limit frame 71 and a spiral coil 72. The limit frames 71 are respectively arranged on the left side of the middle of the relative inner side surfaces of the protective shells 1 on the front and rear sides. The spiral coil 72 is clamped between the two limit frames 71. The input end of the spiral coil 72 is electrically connected to the output end of the first terminal 5 through a wire. The overload reset mechanism 7 also includes a cylindrical magnet 73, a first fixed column 74 and a limit frame 75. The cylindrical magnet 73 is slidably connected to the inner side surface of the spiral coil 72. The middle part of the right end surface of the cylindrical magnet 73 is fixedly connected with the first fixed column 74. The right end surface of the first fixed column 74 is fixedly connected with the limit frame 75. When an instantaneous overload occurs in the circuit, the magnetic field generated by the large current passing through the spiral coil 72 causes the cylindrical magnet 73 to move left. The cylindrical magnet 73 moves left and drives the limit frame 75 to move left through the first fixed column 74. The limit frame 75 moves left, thereby driving the conductive frame 89 to reset. The switch self-locking mechanism 8 is arranged at the upper end between the front and rear end surfaces of the two protective shells 1. The switch self-locking mechanism 8 includes a paddle switch 81, a second fixed column 82, a rotating frame 83, a rotating shaft 84, a connecting frame 85 and a conductive frame 89. The second fixed column 82 is symmetrically rotated and connected between the opposite inner sides of the two protective shells 1. The paddle switch 81 is fixedly connected to the middle of the outer side surface of the second fixed column 82 on the left. The rotating frames 83 are fixedly connected to the front and rear sides of the outer sides of the two second fixed columns 82. The rotating shaft 84 is rotatably connected between the two rotating frames 83 corresponding to the front and rear positions. The connecting frame 85 is rotatably connected between the outer sides of the two rotating shafts 84. The conductive frame 89 is fixedly connected to the outer side surface of the right end of the connecting frame 85. The left and right sides of the conductive frame 89 are respectively slidably connected to the left and right inner wall surfaces of the limit frame 75. The input end of the conductive frame 89 is electrically connected to the output end of the spiral coil 72 through a wire. The switch self-locking mechanism 8 also includes The third fixed column 86, the tension spring 87 and the support 88, the third fixed column 86 is arranged on the upper left side between the opposite inner sides of the two protective shells 1, the support 88 is symmetrically arranged on the right side of the lower side of the outer side of the paddle switch 81, and a limit column is arranged between the two supports 88, and a tension spring 87 is arranged between the outer side of the third fixed column 86 and the outer side of the limit column. When the staff pushes the paddle switch 81 upward, the paddle switch 81 rotates to drive the limit column to rotate with the second fixed column 82 as the center, thereby driving the tension spring 87 to stretch, so that the torque direction of the tension spring 87 on the paddle switch 81 is reversed, thereby achieving self-locking, and at the same time, the paddle switch 81 rotates counterclockwise through the second fixed column 82 to drive the rotating frame 83 to rotate, and the rotating frame 83 rotates through the rotating shaft 84 and the connecting frame 85 to drive the third fixed column 86 to rotate with the second fixed column 82 as the center and the rotating frame 83 as the radius, thereby driving the conductive frame 89 to approach the second wiring terminal 6 to achieve passage; Heat dissipation mechanism 9: It is symmetrically arranged on the opposite outer sides of the two protective shells 1, and the heat dissipation mechanism 9 includes a mounting shaft 91, a mounting positioning ring 92, a heat spreader 93 and a heat dissipation column 97. The mounting shaft 91 is evenly arranged on the opposite outer sides of the two protective shells 1. The outer side of each mounting shaft 91 is slidably connected with a mounting positioning ring 92. A heat spreader 93 is arranged between the four mounting positioning rings 92 on the same side. The outer side of the heat spreader 93 is evenly distributed. Heat dissipation columns 97 are arranged. The heat dissipation mechanism 9 also includes a compression spring 94, a gasket 95 and a butterfly nut 96. The butterfly nut 96 is threadedly connected to the outer side of each mounting shaft 91, and each butterfly nut 96 is corresponding to the mounting position. A gasket 95 is provided between the opposite end faces of the positioning ring 92, and the gasket 95 is slidably connected to the outer side face of the installation shaft 91. A compression spring 94 is provided between the gasket 95 and the opposite end face of the installation positioning ring 92 corresponding to the position, and the compression spring 94 is fixedly sleeved on the outer side face of the installation shaft 91. Since high current generates high heat through the arc extinguishing plate 11 during arc extinguishing, the high temperature heat is evenly transferred to each heat dissipation column 97 under the action of the heat spreader 93 to achieve heat dissipation. The circuit breaker device used in the instantaneous overload state uses a single tension spring and a parallelogram connecting rod mechanism to simply and effectively achieve quick disconnection and resetting, and at the same time adds a passive heat dissipation mechanism to effectively prevent safety hazards caused by overheating of the arc extinguishing mechanism.
[0019] The working principle of a circuit breaker device for instantaneous overload state provided by the present invention is as follows: the staff installs the power line in the installation hole 2 respectively by installing bolts, and then the staff pushes the paddle switch 81 upward, and the paddle switch 81 rotates to drive the limit column to rotate with the second fixed column 82 as the center of the circle, thereby driving the tension spring 87 to stretch, so that the torque direction of the tension spring 87 on the paddle switch 81 is reversed, thereby achieving self-locking, and at the same time, the paddle switch 81 rotates counterclockwise through the second fixed column 82 to drive the rotating frame 83 to rotate, and the rotating frame 83 rotates through the rotating shaft 84 and the connecting rod 84. The connecting frame 85 drives the third fixed column 86 to rotate with the second fixed column 82 as the center and the rotating frame 83 as the radius, thereby driving the conductive frame 89 to approach the second terminal 6 to achieve a passage. At the same time, the conductive frame 89 approaches the second terminal 6. Under the sliding restriction of the limit frame 75, the limit frame 75 moves horizontally to the right through the first fixed column 74 to drive the cylindrical magnet 73 to move to the right. When an instantaneous overload occurs in the circuit, the magnetic field generated by the large current passing through the spiral coil 72 causes the cylindrical magnet 73 to move left. The cylindrical magnet 73 moves left through the first fixed column 74 to drive the limit frame 75 to move left. The frame 75 moves to the left, thereby driving the conductive frame 89 to reset. The conductive frame 89 resets, and an arc is generated at the contact point between the conductive frame 89 and the second terminal 6. As the conductive frame 89 resets, the arc is generated from between the conductive frame 89 and the second terminal 6 to between the conductive frame 89 and the arc-starting piece 12, and finally the arc is generated between the conductive frame 89 and the arc-extinguishing piece. Since the arc-extinguishing piece 11 adopts multiple fractures in series, the arc can be divided into multiple sections. Under the same contact stroke, the arc extension speed and length are greater than those of a single fracture, thereby increasing the arc gap resistance. At the same time, the voltage applied to each fracture is reduced, so that The arc gap recovery voltage is reduced, so that the arc is extinguished quickly. At the same time, the high current generates high heat through the arc extinguishing plate 11 during arc extinguishing. Under the action of the heat spreader 93, the high temperature heat is evenly transferred to each heat dissipation column 97 to achieve heat dissipation. After resetting, the staff can control the circuit closure again through the toggle switch 81. The circuit breaker device used in the instantaneous overload state uses a single tension spring and a parallelogram linkage mechanism to simply and effectively achieve quick disconnection and resetting. At the same time, a passive heat dissipation mechanism is added to effectively prevent the safety hazard caused by overheating of the arc extinguishing mechanism.
[0020] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A circuit breaker device for instantaneous overload conditions, characterized in that: It comprises a protective shell (1), an overload reset mechanism (7), a switch self-locking mechanism (8) and a heat dissipation mechanism (9); Protective shells (1): There are two protective shells (1), which are mounted by cross-slot bolts and cap nuts. Mounting holes (2) are provided in the middle of the upper end surfaces on both sides of the two protective shells (1). The mounting bolts are connected to the mounting holes (2) through internal threads. Wiring holes (3) are provided in the middle of the left and right sides of the two protective shells (1). The lower end outer sides of the mounting bolts in the two mounting holes (2) are connected to the wiring frames (4) through threads. The first wiring terminal (5) and the second wiring terminal (6) are respectively clamped on the left and right sides of the middle of the two protective shells (1). The first wiring terminal (5) and the second wiring terminal (6) correspond to the positions of the two wiring frames (4) respectively. Overload reset mechanism (7): arranged in the middle between the front and rear end surfaces of the two protective shells (1); A switch self-locking mechanism (8): arranged at the upper end between the front and rear end surfaces of the two protective shells (1); Heat dissipation mechanisms (9): symmetrically arranged on opposite outer sides of the two protective shells (1).
2. A circuit breaker device for instantaneous overload state according to claim 1, characterized in that: The overload reset mechanism (7) comprises a limit frame (71) and a spiral coil (72); the limit frames (71) are respectively arranged on the left side of the middle of the opposite inner side surfaces of the protective shell (1) at the front and rear sides; the spiral coil (72) is clamped between the two limit frames (71); the input end of the spiral coil (72) is electrically connected to the output end of the first wiring terminal (5) via a wire.
3. A circuit breaker device for instantaneous overload state according to claim 2, characterized in that: The overload reset mechanism (7) further comprises a cylindrical magnet (73), a first fixing column (74) and a limiting frame (75); the cylindrical magnet (73) is slidably connected to the inner side surface of the spiral coil (72); the middle portion of the right end surface of the cylindrical magnet (73) is fixedly connected to the first fixing column (74); and the right end surface of the first fixing column (74) is fixedly connected to the limiting frame (75).
4. A circuit breaker device for instantaneous overload state according to claim 3, characterized in that: The switch self-locking mechanism (8) comprises a paddle switch (81), a second fixed column (82), a rotating frame (83), a rotating shaft (84), a connecting frame (85) and a conductive frame (89); the second fixed column (82) is symmetrically rotatably connected between the opposite inner side surfaces of the two protective shells (1); the paddle switch (81) is fixedly connected to the middle of the outer side surface of the second fixed column (82) on the left; the rotating frames (83) are fixedly connected to the outer side surfaces of the two second fixed columns (82) on both the front and rear sides; the rotating shaft (84) is rotatably connected between the two rotating frames (83) at the front and rear positions; the connecting frame (85) is rotatably connected between the outer side surfaces of the two rotating shafts (84); the conductive frame (89) is fixedly connected to the outer side surface of the right end of the connecting frame (85); the left and right side surfaces of the conductive frame (89) are respectively slidably connected to the left and right inner wall surfaces of the limit frame (75); the input end of the conductive frame (89) is electrically connected to the output end of the spiral coil (72) through a wire.
5. A circuit breaker device for instantaneous overload state according to claim 4, characterized in that: The switch self-locking mechanism (8) further comprises a third fixing column (86), a tension spring (87) and a support (88), wherein the third fixing column (86) is arranged on the upper left side between the opposite inner side surfaces of the two protective shells (1), the support (88) is symmetrically arranged on the right side of the lower side of the outer side surface of the paddle switch (81), a limiting column is arranged between the two supports (88), and a tension spring (87) is arranged between the outer side surface of the third fixing column (86) and the outer side surface of the limiting column.
6. A circuit breaker device for instantaneous overload state according to claim 1, characterized in that: The heat dissipation mechanism (9) comprises a mounting shaft (91), a mounting positioning ring (92), a heat spreader (93) and heat dissipation columns (97); the mounting shaft (91) is evenly arranged on the opposite outer side surfaces of the two protective shells (1); the outer side surface of each mounting shaft (91) is slidably connected to a mounting positioning ring (92); a heat spreader (93) is arranged between four mounting positioning rings (92) on the same side; and the outer side surface of the heat spreader (93) is evenly distributed with heat dissipation columns (97).
7. A circuit breaker device for instantaneous overload state according to claim 6, characterized in that: The heat dissipation mechanism (9) further comprises a compression spring (94), a gasket (95) and a butterfly nut (96); the butterfly nut (96) is respectively threadedly connected to the outer side surface of each mounting shaft (91); a gasket (95) is arranged between each butterfly nut (96) and the opposite end surface of the mounting positioning ring (92) at the corresponding position; the gasket (95) is slidably connected to the outer side surface of the mounting shaft (91); a compression spring (94) is arranged between the gasket (95) and the opposite end surface of the mounting positioning ring (92) at the corresponding position; and the compression spring (94) is fixedly sleeved on the outer side surface of the mounting shaft (91).
8. A circuit breaker device for instantaneous overload state according to claim 1, characterized in that: It also comprises a retaining frame (10), the retaining frame (10) being clamped between the opposite inner side surfaces of the two protective shells (1), arc extinguishing pieces (11) being clamped equidistantly above and below the opposite inner side surfaces of the retaining frame (10), and an arc striking piece (12) being clamped at the lower end between the opposite inner side surfaces of the retaining frame (10).