Accessory installation structure and circuit breaker

Abstract

The utility model discloses an accessory mounting structure and a circuit breaker, and belongs to the technical field of low-voltage electrical appliances, the accessory mounting structure comprises a mounting plate, a fixing shaft, a pressing plate and a locking member, the first end of the fixing shaft is connected with the mounting plate; the pressing plate can sleeve the second end of the fixing shaft, and a space capable of accommodating the electrical accessories is formed between the pressing plate and the mounting plate; the locking piece is arranged on the side, opposite to the mounting plate, of the pressing plate, the locking piece can be buckled with the second end of the fixing shaft, and the buckling direction of the locking piece and the fixing shaft is perpendicular to the direction of impact force generated when the electrical accessory acts. According to the accessory mounting structure provided by the utility model, the pressing plate is extruded towards the mounting plate through the locking piece, so that the pressing plate presses the electrical accessory on the mounting plate, the replacement of the electrical accessory is facilitated, the replacement efficiency is effectively improved, and the buckling direction of the locking piece and the fixed shaft is vertical to the direction of impact force generated when the electrical accessory acts, so that subsequent unbuckling is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an accessory installation structure and a circuit breaker. Background Art

[0002] As the main basic component in the power system, the universal circuit breaker has an irreplaceable role in the power distribution network. It is mainly used to distribute electric energy in the circuit and protect the lines and electrical equipment of the distribution network from overload, short circuit, undervoltage and ground fault.

[0003] At present, the customization requirements for universal circuit breakers are getting higher and higher, and customers are replacing electrical accessories on site more and more frequently. In the prior art, electrical accessories are usually fixed by screws, which have a large number of screws and lack effective positioning, making the replacement of electrical accessories inconvenient and inefficient. In addition, the impact force generated when the electrical accessories are in motion may cause the screws to loosen, so a greater pre-tightening force is required when locking the screws. When replacing electrical accessories, it is more laborious to screw the locking screws. Utility Model Content

[0004] One purpose of the utility model is to provide an accessory installation structure to facilitate the replacement of electrical accessories.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Provided is an accessory mounting structure, comprising:

[0007] Mounting plate;

[0008] A fixed shaft, a first end of which is connected to the mounting plate;

[0009] A pressing plate, which can be sleeved on the second end of the fixed shaft and forms a space for accommodating electrical accessories between the pressing plate and the mounting plate;

[0010] A locking piece is arranged on the side of the pressure plate facing away from the mounting plate. The locking piece can be snapped with the second end of the fixed shaft and press the electrical accessory onto the mounting plate through the pressure plate. The snapping direction of the locking piece and the fixed shaft is perpendicular to the direction of the impact force generated when the electrical accessory is actuated.

[0011] Optionally, it further comprises a mounting seat fixed relative to the mounting plate, wherein the mounting seat is hinged to the pressure plate.

[0012] Optionally, a first plane is provided on the circumference of the second end of the fixed shaft, and a first limiting hole is provided on the pressure plate. The first limiting hole includes a second plane corresponding to the first plane, and the pressure plate can be limited in the circumferential direction of the fixed shaft by the cooperation of the first plane and the second plane.

[0013] Optionally, a limiting plate is provided on the second plane extending out of the first limiting hole.

[0014] Optionally, a limiting groove is provided on the periphery of the second end of the fixed shaft, and the locking member can extend into the limiting groove.

[0015] Optionally, the locking member is provided with an opening slot, and the opening slot and the limiting slot are buckled with each other.

[0016] Optionally, the limiting groove includes a radial groove surface, and a side of the locking member facing away from the pressure plate can abut against the radial groove surface.

[0017] Optionally, the electrical accessory is provided with a first positioning protrusion at one end facing the pressing plate, the pressing plate is provided with a first positioning hole, and the first positioning protrusion is inserted into the first positioning hole; and / or

[0018] The electrical accessory is provided with a second positioning protrusion at one end facing the mounting plate, the mounting plate is provided with a second positioning hole, and the second positioning protrusion is inserted into the second positioning hole.

[0019] Optionally, an elastic member is further included, wherein the elastic member is arranged between the pressing plate and the locking member, and the elastic member causes the locking member to have a tendency to approach the fixed axis.

[0020] Another object of the utility model is to provide a circuit breaker, comprising an electrical accessory, an operating mechanism and the accessory mounting structure described in any one of the above items, wherein the mounting plate is configured as a cover plate of the operating mechanism.

[0021] Beneficial effects:

[0022] The accessory installation structure provided by the utility model, when replacing the electrical accessory, first unfasten the locking member and the fixed shaft; then lift up the pressure plate, remove and replace the electrical accessory on the mounting plate; finally, sleeve the pressure plate on the fixed shaft, and engage the locking member and the fixed shaft with each other, and use the locking member to press the pressure plate toward the mounting plate so that the pressure plate presses the electrical accessory onto the mounting plate, which facilitates the replacement of the electrical accessory and effectively improves the replacement efficiency. In addition, the engagement direction of the locking member and the fixed shaft is perpendicular to the direction of the impact force generated when the electrical accessory is actuated, which can greatly reduce the force required for the engagement and locking of the locking member and the fixed shaft, and facilitates the subsequent unfastening.

[0023] The circuit breaker provided by the utility model facilitates the replacement of electrical accessories through the arrangement of the accessory installation structure, thereby effectively improving the replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the accessory installation structure provided in the first embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of a circuit breaker when the accessory mounting structure provided in the first embodiment of the utility model is buckled;

[0026] Figure 3 It is a structural schematic diagram of a circuit breaker when the accessory mounting structure provided in the first embodiment of the utility model is released;

[0027] Figure 4 This is a schematic diagram of the structure of the circuit breaker when the pressure plate provided in the first embodiment of the utility model is lifted;

[0028] Figure 5 This is a structural schematic diagram of a pressure plate provided in the first embodiment of the utility model from one perspective;

[0029] Figure 6 It is a structural schematic diagram of a fixed shaft provided in Embodiment 1 of the present utility model;

[0030] Figure 7 It is a structural schematic diagram of the mounting plate provided in the first embodiment of the utility model;

[0031] Figure 8 This is a schematic structural diagram of the pressing plate provided in the first embodiment of the utility model from another viewing angle;

[0032] Fig. 9 This is a structural schematic diagram of an electrical accessory provided by Embodiment 1 of the present utility model from one perspective;

[0033] Fig.10 This is a schematic structural diagram of the electrical accessory provided by the first embodiment of the utility model from another perspective;

[0034] Fig.11 It is a structural schematic diagram of a locking member provided in Embodiment 1 of the utility model;

[0035] Fig.12 It is a structural schematic diagram of the elastic member provided in the first embodiment of the utility model;

[0036] Fig.13 It is an exploded view of the accessory installation structure provided in the second embodiment of the present utility model;

[0037] Fig.14 It is a structural schematic diagram of the pressing plate provided in the second embodiment of the present utility model.

[0038] In the figure:

[0039] 10. electrical accessories; 11. first positioning protrusion; 12. second positioning protrusion; 13. third positioning protrusion; 20. operating mechanism; 21. cover plate; 30. base; 40. pedestal;

[0040] 100, mounting plate; 110, second limiting hole; 120, second positioning hole;

[0041] 200, fixed shaft; 210, first step shaft portion; 220, limiting groove; 221, radial groove surface; 231, second step shaft portion; 232, third step shaft portion; 233, fourth step shaft portion; 240, first plane;

[0042] 300, pressing plate; 310, first limiting hole; 311, second plane; 320, pressing strip; 330, first positioning hole; 340, rotating shaft; 341, stopper; 350, plug hole; 360, reinforcing rib; 361, containing groove; 370, limiting plate;

[0043] 400, locking member; 410, opening slot;

[0044] 500, mounting seat; 510, articulated shaft;

[0045] 600, elastic member; 610, U-shaped hook; 620, insertion portion. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0047] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0050] Embodiment 1

[0051] Reference Figures 1 to 4 As shown, this embodiment provides a circuit breaker, including an electrical accessory 10, an operating mechanism 20 and an accessory mounting structure.

[0052] Specifically, the accessory mounting structure includes a mounting plate 100, a fixed shaft 200, a pressing plate 300 and a locking member 400. The first end of the fixed shaft 200 is connected to the mounting plate 100; the pressing plate 300 can be sleeved on the second end of the fixed shaft 200 and form a space for accommodating the electrical accessory 10 between the pressing plate 300 and the mounting plate 100; the locking member 400 is arranged on the side of the pressing plate 300 facing away from the mounting plate 100, and the locking member 400 can be buckled with the second end of the fixed shaft 200 and press the electrical accessory 10 onto the mounting plate 100 through the pressing plate 300, and the buckling direction of the locking member 400 and the fixed shaft 200 is perpendicular to the direction of the impact force generated when the electrical accessory 10 is in motion.

[0053] In this embodiment, the circuit breaker facilitates the replacement of the electrical accessory 10 by setting the accessory installation structure, and effectively improves the replacement efficiency. For example, when replacing the electrical accessory 10, first unfasten the locking member 400 and the fixed shaft 200; then open the pressure plate 300, remove and replace the electrical accessory 10 on the mounting plate 100; finally, the pressure plate 300 is sleeved on the fixed shaft 200, and the locking member 400 and the fixed shaft 200 are mutually buckled, and the locking member 400 is pressed against the mounting plate 100 by the locking member 400, so that the pressure plate 300 presses the electrical accessory 10 on the mounting plate 100, which facilitates the replacement of the electrical accessory 10 and effectively improves the replacement efficiency. In addition, the buckling direction of the locking member 400 and the fixed shaft 200 is perpendicular to the direction of the impact force generated when the electrical accessory 10 is in motion, which can greatly reduce the force required for the buckling and locking of the locking member 400 and the fixed shaft 200, and facilitates the subsequent unfastening.

[0054] Exemplarily, the electrical accessories 10 include, but are not limited to, a shunt release, an undervoltage release, and a closing electromagnet.

[0055] In a feasible implementation, the mounting plate 100 may be configured as a cover plate 21 of the operating mechanism 20 , so as to make the circuit breaker structure compact and facilitate the installation of the electrical accessory 10 .

[0056] In a possible implementation, Figure 1 As shown, a plurality of electrical accessories 10 can be installed on the mounting plate 100 , that is, the pressing plate 300 can press the plurality of electrical accessories 10 onto the mounting plate 100 under the pressure of the locking member 400 .

[0057] For example, Figure 5 and Figure 6 As shown, a first limiting hole 310 is provided on the pressing plate 300 , and the fixed shaft 200 can be inserted into the first limiting hole 310 to achieve that the pressing plate 300 is sleeved on the second end of the fixed shaft 200 .

[0058] For example, Figure 6 and Figure 7 As shown, the mounting plate 100 is provided with a second limiting hole 110, and the first end of the fixed shaft 200 is provided with a first stepped shaft portion 210, and the first stepped shaft portion 210 is inserted into the second limiting hole 110 to achieve positioning assembly. Among them, the fixed shaft 200 and the mounting plate 100 can be fixedly connected by welding. Of course, the fixed shaft 200 and the mounting plate 100 can also be fixedly connected by riveting, threading or other connection methods.

[0059] In a possible implementation, Figure 1 and Figure 8As shown, at least one pressing strip 320 is provided on the pressing plate 300, and the pressing strip 320 is pressed on the electrical accessories 10 to avoid interference. The pressing strip 320 can press on multiple electrical accessories 10 at the same time.

[0060] In a possible implementation, Figure 5 and Fig. 9 As shown, at least one first positioning protrusion 11 is provided at one end of the electrical accessory 10 facing the pressing plate 300, and the pressing plate 300 is provided with a first positioning hole 330 corresponding to the first positioning protrusion 11. The first positioning protrusion 11 is passed through the first positioning hole 330 to facilitate the positioning and assembly of the electrical accessory 10, and effectively prevent the electrical accessory 10 from sliding relative to the pressing plate 300. Of course, the first positioning protrusion 11 and the first positioning hole 330 can be exchanged, that is, the first positioning protrusion 11 is provided on the pressing plate 300, and the first positioning hole 330 is provided on the electrical accessory 10.

[0061] In a possible implementation, Figure 7 and Fig.10 As shown, at least one second positioning protrusion 12 is provided on one end of the electrical accessory 10 facing the mounting plate 100, and the mounting plate 100 is provided with a second positioning hole 120 corresponding one to one with the second positioning protrusion 12. The second positioning protrusion 12 is passed through the second positioning hole 120 to facilitate the positioning and assembly of the electrical accessory 10 and effectively prevent the electrical accessory 10 from sliding relative to the mounting plate 100.

[0062] Exemplarily, a plurality of third positioning protrusions 13 are provided at one end of the electrical accessory 10 facing the mounting plate 100 , and the third positioning protrusions 13 abut against the mounting plate 100 .

[0063] In this embodiment, refer to Figures 1 to 4 As shown, the accessory mounting structure also includes a mounting seat 500 fixed relative to the mounting plate 100, and the mounting seat 500 is hinged to the pressure plate 300. It can be understood that when the locking member 400 is in contact with the fixed shaft 200, the pressure plate 300 can be rotated to facilitate the replacement of electrical parts. In addition, when the locking member 400 and the fixed shaft 200 are mutually engaged, the pressure plate 300 can be hinged with the mounting seat 500 to achieve stable compression and fixation of the electrical accessory 10. Among them, the pressure plate 300 can be rotatably connected to the mounting seat 500 through the hinge shaft 510.

[0064] In a feasible implementation, the circuit breaker further includes a junction box, and the mounting base 500 can be configured as a base 30 of the junction box. Special accessories can be installed in the junction box, including but not limited to an auxiliary power supply, a communication module, and an undervoltage delay module, and an auxiliary switch can also be provided in the junction box.

[0065] Specifically, the circuit breaker further comprises a base 40 , on which the operating mechanism 20 and the mounting base 500 are arranged.

[0066] In this embodiment, refer to Figure 1 , Figure 6 and Fig.11 As shown, a limiting groove 220 is provided at the periphery of the second end of the fixed shaft 200, and the locking member 400 can extend into the limiting groove 220 to achieve the locking member 400 and the second end of the fixed shaft 200 buckling, and the buckling and unlocking are convenient and reliable.

[0067] Specifically, the limiting groove 220 includes a radial groove surface 221, and the side of the locking member 400 facing away from the pressure plate 300 can be against the radial groove surface 221. It can be understood that the direction of the force between the locking member 400 and the radial groove surface 221 is perpendicular to the radial groove surface 221, that is, the radial groove surface 221 will not generate a force in the direction required for unlocking the locking member 400, effectively preventing the locking member 400 from being separated from the radial groove.

[0068] In some embodiments, the locking member 400 is slidably connected to the pressure plate 300, and the locking member 400 can be moved radially along the fixed shaft 200 to achieve engagement and release with the second end of the fixed shaft 200, that is, the locking member 400 extends into or disengages from the limiting groove 220 in the radial direction, which is convenient and reliable. In other embodiments, the locking member 400 is rotationally connected to the pressure plate 300, and the rotation axis direction of the locking member 400 is parallel to the fixed shaft 200. The locking member 400 is rotated to achieve engagement and release with the second end of the fixed shaft 200, which is convenient and reliable. Among them, the direction of the force between the locking member 400 and the radial groove surface 221 is perpendicular to the radial groove surface 221, and the direction of the force required for release is parallel to the radial groove surface 221, which effectively prevents the locking member 400 from being separated from the radial groove. In addition, the release only needs to overcome the friction between the locking member 400 and the radial groove surface 221, and the friction is small, which is convenient for release.

[0069] Exemplarily, the portion of the locking member 400 that can be inserted into the limiting groove 220 can be in a plate shape to facilitate insertion into the limiting groove 220. Preferably, the overall structure of the locking member 400 can be in a plate shape to facilitate processing and forming.

[0070] In a feasible embodiment, the locking member 400 is provided with an open groove 410, and the open groove 410 and the limit groove 220 are interlocked with each other, which can increase the contact area between the locking member 400 and the radial groove surface 221, ensure that the direction of the force between the locking member 400 and the radial groove surface 221 can be stably maintained perpendicular to the radial groove surface 221, and appropriately increase the friction between the locking member 400 and the radial groove surface 221, so as to more effectively prevent the locking member 400 from detaching from the radial groove.

[0071] Exemplarily, the limiting groove 220 may be an annular groove, the opening groove 410 may be a U-shaped groove, and there is a sufficient contact area between the locking member 400 and the radial groove surface 221. The groove width of the opening groove 410 is greater than or equal to the diameter of the fixed shaft 200 at the limiting groove 220. It is understood that there may be a clearance fit between the opening groove 410 and the limiting groove 220 to ensure that there is a sufficiently large contact area between the locking member 400 and the radial groove surface 221.

[0072] In a feasible implementation, the second end of the fixed shaft 200 is provided with a second stepped shaft portion 231, a third stepped shaft portion 232 and a fourth stepped shaft portion 233 in sequence, and a limiting groove 220 is formed between the second stepped shaft portion 231, the third stepped shaft portion 232 and the fourth stepped shaft portion 233. When the locking member 400 and the fixed shaft 200 are engaged with each other, the first limiting hole 310 is sleeved on the second stepped shaft portion 231, and the setting of the second stepped shaft can prevent the pressing plate 300 from over-pressing the electrical accessory 10.

[0073] Exemplarily, the diameter of the second stepped shaft portion 231 is smaller than or equal to that of the fourth stepped shaft portion 233 , so as to increase the contact area between the locking member 400 and the radial groove surface 221 .

[0074] In this embodiment, refer to Figure 1 , Figure 5 , Fig.12 and Fig.13 As shown, the accessory installation structure further includes an elastic member 600 , which is disposed between the pressing plate 300 and the locking member 400 . The elastic member 600 allows the locking member 400 to have a tendency to approach the fixed shaft 200 .

[0075] For example, taking the sliding connection between the locking member 400 and the pressing plate 300 as an example, the elastic member 600 is configured as a compression spring or a tension spring. Preferably, the elastic member 600 is configured as a tension spring, one of the two hooks of the tension spring is connected to the locking member 400, and the other is connected to the pressing plate 300. More specifically, two tension springs may be provided and symmetrically arranged relative to the fixed shaft 200 to reduce the locking member 400 from being subjected to forces other than along its sliding direction.

[0076] For example, taking the rotational connection between the locking member 400 and the pressure plate 300 as an example, the elastic member 600 is configured as a torsion spring, and the elastic member 600 includes a spring body, a first spring arm provided at the first end of the spring body, and a second spring arm provided at the second end of the spring body. More specifically, the circuit breaker accessory mounting structure also includes a rotating shaft 340, which is sequentially passed through the locking member 400 and the spring body and connected to the pressure plate 300, the first spring arm abuts against the locking member 400, and the second spring arm abuts against the pressure plate 300, so as to facilitate assembly. The rotating shaft 340 can be integrally formed with the pressure plate 300.

[0077] More specifically, the end of the first spring arm is bent to form a U-shaped hook 610, and the first spring arm forms a limit with the locking member 400 through the U-shaped hook 610, which is convenient for assembly. More specifically, the end of the second spring arm is bent to form an insertion portion 620, and the pressure plate 300 is provided with an insertion hole 350, and the insertion portion 620 is inserted into the insertion hole 350, which is convenient for assembly.

[0078] More specifically, a plurality of reinforcing ribs 360 are provided on the pressing plate 300 to stabilize the structure of the pressing plate 300 , and receiving grooves 361 are formed between the reinforcing ribs, and the torsion springs are placed in the receiving grooves 361 .

[0079] More specifically, a stopper 341 is provided at one end of the rotating shaft 340 facing away from the pressing plate 300 , and the stopper 341 is used to resist the locking member 400 to prevent the locking member 400 from being separated from the rotating shaft 340 .

[0080] In this embodiment, the accessory mounting structure may not be provided with the elastic member 600, and the locking member 400 may be provided as a torsion spring, specifically including a locking spring body, and a fixed spring arm and a locking spring arm respectively provided at both ends of the locking spring body. The locking spring body is sleeved on the rotating shaft 340, the fixed spring arm is supported by the pressing plate 300, and the locking spring arm can be extended into the limiting groove 220 for locking, so as to realize the locking member 400 and the second end of the fixed shaft 200 being buckled. The fixed spring arm can be inserted into the insertion hole 350.

[0081] Embodiment 2

[0082] The pressing plate 300 in the accessory installation structure provided in this embodiment is not hinged to the hinge plate, and the matching mode between the fixed shaft 200 and the pressing plate 300 is different from that in the first embodiment. Figure 13 to Figure 14 As shown, the second end circumference of the fixed shaft 200 is provided with a first plane 240, and the first limiting hole 310 of the pressure plate 300 includes a second plane 311 corresponding to the first plane 240. The pressure plate 300 can be limited in the circumferential direction of the fixed shaft 200 by the first plane 240 and the second plane 311. In this embodiment, the limiting cooperation between the first plane 240 and the second plane 311 can effectively prevent the pressure plate 300 from rotating relative to the fixed shaft 200, so that the pressure plate 300 can firmly press the electrical accessory 10 on the mounting plate 100, and prevent the electrical accessory 10 from being damaged due to the rotation of the pressure plate 300. In addition, the pressure plate 300 can be completely separated from the circuit breaker to prevent the pressure plate 300 from falling back and interfering with the replacement of the electrical accessory 10.

[0083] Specifically, a limiting plate 370 is provided on the second plane 311 extending out of the first limiting hole 310 to increase the contact area with the first plane 240 and more effectively prevent the pressing plate 300 from rotating.

[0084] Specifically, the fixed shaft 200 is provided with at least one first plane 240 along the circumferential direction, and the first plane 240 is provided in one-to-one correspondence with the second plane 311. Preferably, two first planes 240 are provided and are symmetrically arranged to more effectively prevent the pressing plate 300 from rotating.

[0085] The other structures of the accessory installation structure provided in this embodiment are the same as those in the first embodiment and will not be described in detail here.

[0086] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An accessory installation structure, characterized in that: include: Mounting plate (100); A fixed shaft (200), a first end of the fixed shaft (200) being connected to the mounting plate (100); A pressing plate (300) which can be sleeved on the second end of the fixed shaft (200) and forms a space between the pressing plate (300) and the mounting plate (100) for accommodating an electrical accessory (10); A locking member (400) is arranged on a side of the pressure plate (300) facing away from the mounting plate (100); the locking member (400) can be snapped together with the second end of the fixed shaft (200) and press the electrical accessory (10) onto the mounting plate (100) through the pressure plate (300); and the snapping direction of the locking member (400) and the fixed shaft (200) is perpendicular to the direction of the impact force generated when the electrical accessory (10) is in motion.

2. The accessory mounting structure according to claim 1, characterized in that: It also includes a mounting seat (500) fixed relative to the mounting plate (100), and the mounting seat (500) is hinged to the pressing plate (300).

3. The accessory mounting structure according to claim 1, characterized in that: A first plane (240) is provided on the second end circumference of the fixed shaft (200), and a first limiting hole (310) is provided on the pressure plate (300). The first limiting hole (310) includes a second plane (311) corresponding to the first plane (240). The pressure plate (300) can be limited in the circumferential direction of the fixed shaft (200) by the first plane (240) and the second plane (311).

4. The accessory mounting structure according to claim 3, characterized in that: A limiting plate (370) is provided on the second plane (311) extending outside the first limiting hole (310).

5. The accessory mounting structure according to claim 1, characterized in that: A limiting groove (220) is provided on the periphery of the second end of the fixed shaft (200), and the locking member (400) can extend into the limiting groove (220).

6. The accessory mounting structure according to claim 5, characterized in that: The locking member (400) is provided with an opening groove (410), and the opening groove (410) and the limiting groove (220) are interlocked.

7. The accessory mounting structure according to claim 5, characterized in that: The limiting groove (220) comprises a radial groove surface (221), and a side of the locking member (400) facing away from the pressing plate (300) can abut against the radial groove surface (221).

8. The accessory mounting structure according to claim 1, characterized in that: The electrical accessory (10) is provided with a first positioning protrusion (11) at one end facing the pressing plate (300), the pressing plate (300) is provided with a first positioning hole (330), and the first positioning protrusion (11) is inserted into the first positioning hole (330); and / or The electrical accessory (10) is provided with a second positioning protrusion (12) at one end facing the mounting plate (100), the mounting plate (100) is provided with a second positioning hole (120), and the second positioning protrusion (12) is inserted into the second positioning hole (120).

9. The accessory mounting structure according to any one of claims 1 to 8, characterized in that: It also includes an elastic member (600), wherein the elastic member (600) is disposed between the pressing plate (300) and the locking member (400), and the elastic member (600) causes the locking member (400) to have a tendency to approach the fixed shaft (200).

10. A circuit breaker, characterized in that: It comprises an electrical accessory (10), an operating mechanism (20), and an accessory mounting structure according to any one of claims 1 to 9, wherein a mounting plate (100) of the accessory mounting structure is configured as a cover plate (21) of the operating mechanism (20).

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