Plug-in circuit breaker

Abstract

The invention discloses a plug-in circuit breaker which comprises a mounting plate, a plug-in circuit breaker body arranged on the right side of the mounting plate and a connecting assembly arranged on one side of the mounting plate, the connecting assembly comprises a heat dissipation mechanism arranged on one side of the plug-in circuit breaker body, and a limiting mechanism is arranged on the lower portion of the plug-in circuit breaker body. A damping mechanism is arranged on one side of the mounting plate, the slope clamping block movably penetrates through the movable groove and is clamped with the clamping groove, one end of the first spring is fixedly connected with the movable block, the outer side of the movable block is fixedly connected with the pull rod, and one end of the first inner groove is fixedly connected with the ejection column; and the mounting sleeve is mounted at the bottom of the plug-in circuit breaker body through the mounting block. The problems that according to an existing device, a dustproof net is inconvenient to disassemble and clean manually, after the dustproof net is used for a long time, meshes are prone to being blocked, the ventilation effect of the dustproof net is affected, and the subsequent heat dissipation effect is affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of plug-in circuit breakers, and particularly to a plug-in circuit breaker. Background Art

[0002] A plug-in circuit breaker is a device used to protect the safety of a circuit, also known as a mini circuit breaker or air switch. As part of circuit protection and overload protection, a plug-in circuit breaker mainly consists of a contact system, an arc extinguishing system, an operating mechanism, a tripping device, etc. Its contacts usually adopt a plug-in connection method to connect with a busbar or other components in the circuit. This connection method makes the installation and maintenance of the circuit breaker more convenient and fast, and is widely used in the power supply and distribution systems of industrial sites such as factories, mines, and metallurgy for the protection and control of electrical equipment such as motors, transformers, and distribution cabinets. For example, in a large production line, a plug-in circuit breaker can protect the power supply lines of each section. When a certain device fails, it can quickly cut off the corresponding circuit to prevent the expansion of the fault, and it is also widely used in the electrical systems of commercial buildings such as shopping malls, office buildings, and hotels.

[0003] According to a plug-in circuit breaker with a wire anti-disconnection function disclosed in the patent publication number CN 221379268 U, this device can drive a fan part to rotate through a motor, can blow the air inside the circuit breaker body, can discharge heat from the gaps of the dust-proof net, and can prevent dust from entering, so as to have a certain dust-proof effect; however, this device is not convenient for manual disassembly and cleaning of the dust-proof net. After long-term use of the dust-proof net, the mesh holes are prone to blockage, which affects the ventilation effect of the dust-proof net and thus affects the subsequent heat dissipation effect.

[0004] Therefore, we propose a plug-in circuit breaker to solve the problem. Summary of the Invention

[0005] The purpose of the present invention is to provide a plug-in circuit breaker to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solution: A plug-in circuit breaker, including a mounting plate; A plug-in circuit breaker body arranged on the right side of the mounting plate; And a connection component arranged on one side of the mounting plate. The connection component includes a heat dissipation mechanism arranged on one side of the plug-in circuit breaker body, a limiting mechanism is arranged at the lower part of the plug-in circuit breaker body, and a shock absorption mechanism is arranged on one side of the mounting plate.

[0007] According to the above technical solution, the heat dissipation mechanism includes an air outlet hole opened on one side of the mounting plate. A heat dissipation fan is fixedly installed on the inner wall of the air outlet hole through a mounting frame. A placement groove is opened outside the air outlet hole. An installation frame is clamped inside the placement groove. A clamping groove is opened on the side wall of the installation frame. A dust-proof net is fixedly installed inside the installation frame. An activity groove is opened inside the plug-in circuit breaker body. An activity block is slidably connected to the inner wall of the activity groove. A beveled clamping block is fixedly connected to one side of the activity block. A first spring is fixedly connected to the inner wall of the activity groove. An activity hole is opened on the outer side of the inner wall of the activity groove. A pull rod is slidably connected to the inner wall of the activity hole. A first inner groove is opened inside the placement groove. A top-out column is sleeved inside the first inner groove. A second spring is fixedly connected to the inner wall of the first inner groove.

[0008] According to the above technical solution, the limiting mechanism includes a mounting sleeve arranged at the bottom of the plug-in circuit breaker body. A mounting block is fixedly connected to the outer wall of the mounting sleeve. A second inner groove is opened on the inner wall of the mounting sleeve. A connecting column is sleeved inside the second inner groove. A third spring is fixedly connected to the inner wall of the second inner groove. A clamping plate is fixedly connected to the outer end of the connecting column. A wear-resistant layer is arranged on the clamping surface of the clamping plate. A wiring hole is opened at the bottom of the plug-in circuit breaker body. A bolt is threadedly connected to the front part of the plug-in circuit breaker body.

[0009] According to the above technical solution, the shock absorption mechanism includes a sliding groove opened on the right side of the mounting plate. A sliding rod is fixedly connected to the inner wall of the sliding groove. A slider is slidably connected to the outer wall of the sliding rod. A fourth spring is fixedly connected to the inner wall of the sliding groove. A pressing column is opened on the inner wall of the sliding groove. A third inner groove is sleeved inside the slider. The pressing column is sleeved inside the third inner groove. A fifth spring is fixedly connected to the inner wall of the third inner groove.

[0010] The beveled clamping block movably penetrates through the activity groove and is clamped with the clamping groove. One end of the first spring is fixedly connected to the activity block. The outer side of the activity block is fixedly connected to the pull rod. Through the cooperation of the air outlet hole, the placement groove, the installation frame, the dust-proof net, the clamping groove, the activity groove, the activity block, the beveled clamping block, the first spring, the activity hole, and the pull rod, it is convenient for manual disassembly of the installation frame, thereby facilitating the manual cleaning operation of the dust-proof net, preventing the clogging of the mesh holes of the dust-proof net and affecting the ventilation effect, so that the subsequent heat dissipation effect can be better, preventing the temperature inside the plug-in circuit breaker body from being too high and causing damage to the components inside the plug-in circuit breaker body, and thus extending the service life of the device and increasing the applicability of the device.

[0011] According to the above technical solution, one end of the first inner groove is fixedly connected to the top-out column. Through the cooperation of the first inner groove, the top-out column, and the second spring, when the beveled clamping block is separated from the clamping groove, the installation frame can be popped outwards, making it more convenient for manual removal of the installation frame without the need for manual continuous support of the pull rod, increasing the applicability of the device.

[0012] According to the above technical solution, one end of the third spring is fixedly connected to the connecting column, and the mounting sleeve is mounted at the bottom of the plug-in circuit breaker body through the mounting block. Through the cooperation of the mounting sleeve, the mounting block, the second inner groove, the connecting column, the third spring, the clamping plate, the wear-resistant layer, and the wiring hole, the wire harness can be assisted in fixing, so as to achieve the anti-dropping effect, the protection effect, and further increase the applicability of the device.

[0013] According to the above technical solution, there are two mounting sleeves, which are respectively mounted at the bottom of the wiring hole.

[0014] According to the above technical solution, the outer side of the slider is fixedly connected to the plug-in circuit breaker body, and one end of the fourth spring is fixedly connected to the slider. Through the cooperation of the chute, the sliding rod, the slider, the fourth spring, the pressing groove, the third inner groove, the pressing column, and the fifth spring, when the plug-in circuit breaker body is vibrated, the damping effect can be achieved, so as to protect the plug-in circuit breaker body, and further increase the service life of the plug-in circuit breaker body.

[0015] According to the above technical solution, one end of the fifth spring is fixedly connected to the pressing column, the pressing column is in pressing contact with the pressing groove, and the pressing end of the pressing column is hemispherical.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: (1) In the present invention, by providing a heat dissipation mechanism, under the action of the air outlet hole, the placement groove, the mounting frame, the dust-proof net, the card slot, the movable groove, the movable block, the inclined surface clamping block, the first spring, the movable hole, and the pull rod, it is convenient for manual disassembly of the mounting frame, so as to facilitate manual cleaning of the dust-proof net, prevent the clogging of the mesh holes of the dust-proof net and affect the ventilation effect, so that the subsequent heat dissipation effect is better, prevent the temperature inside the plug-in circuit breaker body from being too high, resulting in damage to the components inside the plug-in circuit breaker body, and further extend the service life of the device and increase the applicability of the device.

[0017] (2) In the present invention, by providing a heat dissipation mechanism, under the action of the first inner groove, the ejecting column, and the second spring, when the inclined surface clamping block is separated from the card slot, the mounting frame can be ejected outwards, so that it is more convenient for manual removal of the mounting frame, without the need for manual continuous support of the pull rod, increasing the applicability of the device.

[0018] (3) In the present invention, by providing a limiting mechanism, under the action of the mounting sleeve, the mounting block, the second inner groove, the connecting column, the third spring, the clamping plate, the wear-resistant layer, and the wiring hole, the wire harness can be assisted in fixing, so as to achieve the anti-dropping effect, the protection effect, and further increase the applicability of the device.

[0019] (4) In the present invention, by providing a shock-absorbing mechanism, under the action of the chute, the sliding rod, the slider, the fourth spring, the pressing groove, the third inner groove, the pressing column, and the fifth spring, when the plug-in circuit breaker body is vibrated, a shock-absorbing effect can be achieved, thereby protecting the plug-in circuit breaker body and further increasing the service life of the plug-in circuit breaker body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings: Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the overall sectional structure of the present invention; Figure 3 is a schematic diagram of the structure of the heat dissipation mechanism of the present invention; Figure 4 is of the present invention Figure 3 schematic diagram of the structure at A in; Figure 5 is a schematic diagram of the structure of the limiting mechanism of the present invention; Figure 6 is a schematic diagram of the structure of the shock-absorbing mechanism of the present invention; Figure 7 is of the present invention Figure 6 magnified schematic diagram of the structure at B in; In the figure: 1, mounting plate; 2, plug-in circuit breaker body; 3, connection component; 31, heat dissipation mechanism; 311, air outlet hole; 312, placement groove; 313, mounting frame; 314, dust-proof net; 315, card slot; 316, cooling fan; 317, activity groove; 318, activity block; 319, inclined surface clamping block; 3110, first spring; 3111, activity hole; 3112, pull rod; 3113, first inner groove; 3114, ejecting column; 3115, second spring; 32, limiting mechanism; 321, mounting sleeve; 322, mounting block; 323, second inner groove; 324, connection column; 325, third spring; 326, clamping plate; 327, wear-resistant layer; 328, wiring hole; 329, bolt; 33, shock-absorbing mechanism; 331, chute; 332, sliding rod; 333, slider; 334, fourth spring; 335, pressing groove; 336, third inner groove; 337, pressing column; 338, fifth spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1: As Figures 1-7 shown, the present invention provides a technical solution: a plug-in circuit breaker, including a mounting plate 1, a plug-in circuit breaker body 2 disposed on the right side of the mounting plate 1, and a connection assembly 3 disposed on one side of the mounting plate 1. The connection assembly 3 includes a heat dissipation mechanism 31 disposed on one side of the plug-in circuit breaker body 2, a limiting mechanism 32 disposed below the plug-in circuit breaker body 2, and a shock absorption mechanism 33 disposed on one side of the mounting plate 1. The heat dissipation mechanism 31 includes an air outlet hole 311 opened on one side of the mounting plate 1. A heat dissipation fan 316 is fixedly installed on the inner wall of the air outlet hole 311 through a mounting frame. A placement groove 312 is opened outside the air outlet hole 311. An installation frame 313 is clamped inside the placement groove 312. A card slot 315 is opened on the side wall of the installation frame 313. A dust-proof net 314 is fixedly installed inside the installation frame 313. An activity groove 317 is opened inside the plug-in circuit breaker body 2. An activity block 318 is slidably connected to the inner wall of the activity groove 317. An inclined surface clamping block 319 is fixedly connected to one side of the activity block 318. A first spring 3110 is fixedly connected to the inner wall of the activity groove 317. An activity hole 3111 is opened outside the inner wall of the activity groove 317. A pull rod 3112 is slidably connected to the inner wall of the activity hole 3111. A first inner groove 3113 is opened inside the placement groove 312. A top-out column 3114 is sleeved inside the first inner groove 3113. A second spring 3115 is fixedly connected to the inner wall of the first inner groove 3113.

[0023] In this embodiment, the inclined surface clamping block 319 is movably penetrated through the activity groove 317 and is clamped with the card slot 315. One end of the first spring 3110 is fixedly connected to the activity block 318, and the outside of the activity block 318 is fixedly connected to the pull rod 3112. Through the cooperation of the air outlet hole 311, the placement groove 312, the installation frame 313, the dust-proof net 314, the card slot 315, the activity groove 317, the activity block 318, the inclined surface clamping block 319, the first spring 3110, the activity hole 3111, and the pull rod 3112, it is convenient for manual disassembly of the installation frame 313, thereby facilitating the manual cleaning operation of the dust-proof net 314, preventing the clogging of the mesh holes of the dust-proof net 314 and affecting the ventilation effect, so that the subsequent heat dissipation effect can be better, preventing the temperature inside the plug-in circuit breaker body 2 from being too high and causing damage to the components inside the plug-in circuit breaker body 2, and thus extending the service life of the device and increasing the applicability of the device.

[0024] Further, one end of the first inner groove 3113 is fixedly connected to the ejector post 3114. Through the cooperation of the first inner groove 3113, the ejector post 3114, and the second spring 3115, when the inclined surface block 319 is separated from the card slot 315, the mounting frame 313 can be ejected outward, making it more convenient for manual removal of the mounting frame 313 without the need for manual support of the pull rod 3112 all the time, thus increasing the applicability of the device.

[0025] When the device is in use, first, the mounting plate 1 is manually installed at the designated position, and then the wire harness can be connected to the plug-in circuit breaker body 2. When the plug-in circuit breaker body 2 is in use, the heat-dissipating fan 316 can discharge the hot air inside the plug-in circuit breaker body 2 to the outside, thereby achieving a heat dissipation effect and preventing the components inside the plug-in circuit breaker body 2 from being damaged due to excessive temperature. Moreover, under the action of the dust-proof net 314, external dust and impurities can be prevented from entering the plug-in circuit breaker body 2. Further, when the dust-proof net 314 needs to be cleaned, first, manually hold the pull rod 3112 and pull the movable block 318 to move in the movable groove 317, so that the inclined surface block 319 fixedly connected to one side of the movable block 318 is separated from the card slot 315. Subsequently, under the action of the elastic force of the second spring 3115, the ejector post 3114 can press the mounting frame 313 outward, so that the card slot 315 opened on the side wall of the mounting frame 313 is quickly misaligned with the inclined surface block 319 without the need for manual support of the pull rod 3112 all the time, enabling the manual to free up a hand. Then, the mounting frame 313 and the dust-proof net 314 can be taken outwards, which is convenient for manual cleaning of the dust-proof net 314 and subsequent use. And when the mounting frame 313 and the dust-proof net 314 are installed, only need to manually snap the mounting frame 313 into the placement groove 312, and then press the mounting frame 313 inward. Since the outer side of the inclined surface block 319 is an inclined surface, when the mounting frame 313 enters the placement groove 312, the inclined surface block 319 can be pressed into the movable groove 317. Subsequently, when the mounting frame 313 is fully fitted with the placement groove 312, under the action of the elastic force of the first spring 3110, the inclined surface block 319 can move outward and be engaged with the card slot 315, thus fixing the mounting frame 313 in the placement groove 312, and the installation operation is completed, and the operation is simple and convenient.

[0026] Embodiment 2: On the basis of Embodiment 1, a preferred embodiment of the plug-in circuit breaker provided by the present invention is as Figures 1-7As shown in the figure: The limiting mechanism 32 includes a mounting sleeve 321 provided at the bottom of the plug-in circuit breaker body 2. An installation block 322 is fixedly connected to the outer wall of the mounting sleeve 321. A second inner groove 323 is provided in the inner wall of the mounting sleeve 321. A connecting column 324 is sleeved inside the second inner groove 323. A third spring 325 is fixedly connected to the inner wall of the second inner groove 323. A clamping plate 326 is fixedly connected to the outer end of the connecting column 324. A wear-resistant layer 327 is provided on the clamping surface of the clamping plate 326. A wiring hole 328 is provided at the bottom of the plug-in circuit breaker body 2. A bolt 329 is threadedly connected to the front part of the plug-in circuit breaker body 2.

[0027] In this embodiment, one end of the third spring 325 is fixedly connected to the connecting column 324. The mounting sleeve 321 is installed at the bottom of the plug-in circuit breaker body 2 through the mounting block 322. Through the cooperation of the mounting sleeve 321, the mounting block 322, the second inner groove 323, the connecting column 324, the third spring 325, the clamping plate 326, the wear-resistant layer 327, and the wiring hole 328, the wire harness can be assisted in fixing, so as to achieve the anti-dropping effect and the protection effect, thereby increasing the applicability of the device.

[0028] Furthermore, the number of the mounting sleeves 321 is two, which are respectively installed at the bottom of the wiring hole 328.

[0029] When connecting the wire harness, first manually pass the wire harness through the mounting sleeve 321 and insert it into the wiring hole 328. Then rotate the bolt 329 to fix the connecting end of the wire harness. At the same time, under the action of the elastic force of the third spring 325, the connecting column 324 can drive the clamping plate 326 to clamp the wire harness outward. And under the action of the wear-resistant layer 327, the wire harness can be assisted in fixing, so as to achieve the anti-dropping effect of the wire harness and increase the applicability of the device.

[0030] Embodiment 3: On the basis of Embodiment 1, a preferred embodiment of the plug-in circuit breaker provided by the present invention is as Figures 1-7 shown: The shock-absorbing mechanism 33 includes a chute 331 opened on the right side of the mounting plate 1. A slide bar 332 is fixedly connected to the inner wall of the chute 331. A slider 333 is slidably connected to the outer wall of the slide bar 332. A fourth spring 334 is fixedly connected to the inner wall of the chute 331. A pressure column 337 is opened on the inner wall of the chute 331. A third inner groove 336 is sleeved inside the slider 333. A pressure column 337 is sleeved inside the third inner groove 336. A fifth spring 338 is fixedly connected to the inner wall of the third inner groove 336.

[0031] In this embodiment, the outer side of the slider 333 is fixedly connected to the plug-in circuit breaker body 2. One end of the fourth spring 334 is fixedly connected to the slider 333. Through the cooperation of the chute 331, the slide bar 332, the slider 333, the fourth spring 334, the pressing groove 335, the third inner groove 336, the pressing column 337, and the fifth spring 338, when the plug-in circuit breaker body 2 is vibrated, a shock-absorbing effect can be achieved, thereby protecting the plug-in circuit breaker body 2 and further increasing the service life of the plug-in circuit breaker body 2.

[0032] Further, one end of the fifth spring 338 is fixedly connected to the pressing column 337. The pressing column 337 is in pressing contact with the pressing groove 335, and the pressing end of the pressing column 337 is hemispherical.

[0033] When an external force causes vibration to the plug-in circuit breaker body 2, under the action of gravity, the plug-in circuit breaker body 2 fixedly connected to the outer side of the slider 333 can slide relative to the mounting plate 1. Since the outer side of the slider 333 is fixedly connected to the plug-in circuit breaker body 2, when the plug-in circuit breaker body 2 slides relative to the mounting plate 1, the slider 333 can slide relative to the inside of the chute 331 through the slide bar 332, causing the fourth spring 334 to deform, thereby achieving a buffering effect. And when the slider 333 slides relative to the chute 331, under the action of the elastic force of the fifth spring 338, the pressing column 337 can slide relative to the pressing groove 335. Thus, under the combined action of the pressing force and the frictional force, the elastic potential energy of the fourth spring 334 during the buffering process can be offset, thereby achieving a shock-absorbing effect and further protecting the plug-in circuit breaker body 2.

[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0035] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A plug-in circuit breaker, comprising a mounting plate (1); A plug-in circuit breaker body (2) arranged on the right side of the mounting plate (1); and a connecting component (3) arranged on one side of the mounting plate (1), characterized in that: The connection assembly (3) comprises a heat dissipation mechanism (31) arranged on one side of the plug-in circuit breaker body (2), a limit mechanism (32) is arranged at the lower part of the plug-in circuit breaker body (2), and a shock absorbing mechanism (33) is arranged on one side of the mounting plate (1).

2. A plug-in circuit breaker according to claim 1, characterized in that: The heat dissipation mechanism (31) comprises an air outlet (311) provided on one side of the mounting plate (1); a heat dissipation fan (316) is fixedly mounted on the inner wall of the air outlet (311) via a mounting frame; a placement groove (312) is provided on the outer side of the air outlet (311); a mounting frame (313) is clamped inside the placement groove (312); a clamping groove (315) is provided on the side wall of the mounting frame (313); a dustproof net (314) is fixedly mounted inside the mounting frame (313); a movable groove (317) is provided inside the plug-in circuit breaker body (2); and the inner wall of the movable groove (317) is slidably connected to the inner wall of the movable groove (317). A movable block (318) is connected, one side of the movable block (318) is fixedly connected to a bevel block (319), the inner wall of the movable groove (317) is fixedly connected to a first spring (3110), the outer side of the inner wall of the movable groove (317) is provided with a movable hole (3111), the inner wall of the movable hole (3111) is slidably connected to a pull rod (3112), the placement groove (312) is provided with a first inner groove (3113), the first inner groove (3113) is sleeved with an ejection column (3114), and the inner wall of the first inner groove (3113) is fixedly connected to a second spring (3115).

3. A plug-in circuit breaker according to claim 1, characterized in that: The limiting mechanism (32) comprises a mounting sleeve (321) arranged at the bottom of the plug-in circuit breaker body (2); a mounting block (322) is fixedly connected to the outer wall of the mounting sleeve (321); a second inner groove (323) is provided on the inner wall of the mounting sleeve (321); a connecting column (324) is sleeved inside the second inner groove (323); a third spring (325) is fixedly connected to the inner wall of the second inner groove (323); a clamping plate (326) is fixedly connected to the outer end of the connecting column (324); a clamping surface of the clamping plate (326) is provided with a wear-resistant layer (327); a wiring hole (328) is provided at the bottom of the plug-in circuit breaker body (2); and a bolt (329) is threadedly connected to the front of the plug-in circuit breaker body (2).

4. A plug-in circuit breaker according to claim 1, characterized in that: The shock absorbing mechanism (33) comprises a slide groove (331) provided on the right side of the mounting plate (1); a slide rod (332) is fixedly connected to the inner wall of the slide groove (331); a slider (333) is slidably connected to the outer wall of the slider rod (332); a fourth spring (334) is fixedly connected to the inner wall of the slide groove (331); a pressure column (337) is provided on the inner wall of the slide groove (331); a third inner groove (336) is sleeved inside the slider (333); a pressure column (337) is sleeved inside the third inner groove (336); and a fifth spring (338) is fixedly connected to the inner wall of the third inner groove (336).

5. A plug-in circuit breaker according to claim 2, characterized in that: The inclined surface clamping block (319) is movably inserted into the movable groove (317) and is clamped with the clamping groove (315); one end of the first spring (3110) is fixedly connected to the movable block (318); and the outer side of the movable block (318) is fixedly connected to the pull rod (3112).

6. A plug-in circuit breaker according to claim 2, characterized in that: One end of the first inner groove (3113) is fixedly connected to the ejection column (3114).

7. A plug-in circuit breaker according to claim 3, characterized in that: One end of the third spring (325) is fixedly connected to the connecting column (324), and the mounting sleeve (321) is mounted on the bottom of the plug-in circuit breaker body (2) via a mounting block (322).

8. The plug-in circuit breaker according to claim 3, characterized in that: There are two mounting sleeves (321), which are respectively mounted at the bottom of the wiring hole (328).

9. A plug-in circuit breaker according to claim 4, characterized in that: The outer side of the slider (333) is fixedly connected to the plug-in circuit breaker body (2), and one end of the fourth spring (334) is fixedly connected to the slider (333).

10. The plug-in circuit breaker according to claim 4, characterized in that: One end of the fifth spring (338) is fixedly connected to the pressing column (337), the pressing column (337) is in pressing contact with the pressing groove (335), and the pressing end of the pressing column (337) is hemispherical.

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