Mounting structure and circuit breaker

Abstract

The invention belongs to the technical field of electric equipment, and discloses a mounting structure and a circuit breaker. The mounting structure comprises a base plate, a fixing shaft, a cover plate and an elastic part, the base plate is used for supporting the electrical accessory, a first end of the fixing shaft is fixed on the base plate, the cover plate is located above the electrical accessory, a second end of the fixing shaft penetrates through the cover plate, the elastic part is arranged at the second end, penetrating through the cover plate, of the fixing shaft, and the elastic part is used for providing force for abutting against the cover plate. Therefore, the cover plate presses the electrical accessory against the substrate. The circuit breaker comprises the installation structure, a body and an operating mechanism, the substrate is fixed on the body, the operating mechanism is arranged on the body, and the electrical accessory is used for driving the operating mechanism to be switched on or switched off. According to the mounting structure and the circuit breaker provided by the invention, the electrical accessories can be quickly disassembled and assembled, excessive extrusion on the electrical accessories is avoided, and reliable fixation of the electrical accessories can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and particularly relates to an installation structure and a circuit breaker. Background Art

[0002] The universal circuit breaker includes electrical accessories such as a shunt trip and a closing electromagnet. The shunt trip is used to trip the circuit breaker, and the closing electromagnet is used to close the circuit breaker. When the circuit breaker needs to trip or close, the electrical accessory performs an action to touch the closing trigger part or the tripping trigger part of the operating mechanism, so that the operating mechanism performs the tripping and closing actions.

[0003] In the prior art, the common installation method of electrical accessories refers to Figure 1 As shown in the figure, the substrate 1' is fixed on the body of the circuit breaker. A fixed shaft 2' is provided on the substrate 1'. The electrical accessory 5' is supported on the substrate 1'. A cover plate 3' is installed above the fixed shaft 2' and fastened by bolts, so that the cover plate 3' presses the electrical accessory 5' against the substrate 1', thereby realizing the fixation of the electrical accessory 5'. However, the above fixation method requires frequent screwing of the screw 4' during the replacement of the electrical accessory 5', which is inconvenient to operate. Moreover, the force of manually screwing the screw 4' is uncontrollable. If the screw 4' is screwed too tightly, it will over-extrude the electrical accessory 5', and in severe cases, the electrical accessory 5' will fail. If the screw 4' is screwed too loosely, it cannot effectively fix the electrical accessory 5', and the electrical accessory 5' will move or even come out. Summary of the Invention

[0004] The purpose of the present invention is to provide an installation structure that can realize the quick disassembly and assembly of electrical accessories, avoid over-extruding the electrical accessories, and ensure the reliable fixation of the electrical accessories.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] An installation structure, comprising:

[0007] A substrate for supporting electrical accessories;

[0008] A fixed shaft, the first end of which is fixed to the substrate;

[0009] A cover plate located above the electrical accessory, and the second end of the fixed shaft penetrates through the cover plate;

[0010] An elastic member provided at the second end of the fixed shaft passing through the cover plate, and the elastic member is used to provide a force for pressing the cover plate, so that the cover plate presses the electrical accessory against the substrate.

[0011] Preferably, a groove is formed on the outer peripheral wall of the second end of the fixed shaft, and a plugging groove is provided on the elastic member. The groove is located on the side of the cover plate away from the substrate, and the elastic member is plugged into the groove through the plugging groove.

[0012] Preferably, along the axial direction of the fixed shaft, a plurality of the grooves are arranged at intervals.

[0013] Preferably, the elastic member includes a base portion and at least two elastic arms. The elastic arms are arranged on the base portion, and the elastic arms extend obliquely toward the cover plate. A contact head for abutting against the cover plate is provided at the extending end of the elastic arm, and the plugging groove is formed jointly by two adjacent elastic arms and the base portion.

[0014] Preferably, the elastic member further includes a positioning projection. The positioning projection is arranged on the base portion, and a positioning recess is correspondingly provided on the upper end surface of the cover plate. The positioning projection is used for being plugged into the positioning recess when the plugging groove is plugged into the groove.

[0015] Preferably, the fixed shaft includes a first shaft portion and a second shaft portion which are arranged in a stepped manner in sequence from the first end to the second end. The shaft diameter of the second shaft portion is smaller than that of the first shaft portion, and a limiting platform is formed between the first shaft portion and the second shaft portion;

[0016] A sleeve is provided on the side of the cover plate facing the fixed shaft. The sleeve is provided with a through hole penetrating to the upper end surface of the cover plate. The second shaft portion penetrates through the through hole and is connected to the elastic member, and one end of the sleeve away from the cover plate is used for abutting against the limiting platform.

[0017] Preferably, the second shaft portion is arranged as a non-circular column, the through hole is a non-circular hole, and the shape of the through hole is adapted to that of the second shaft portion.

[0018] Preferably, the cover plate is provided with a positioning hole, and a positioning convex column is correspondingly provided on the upper end surface of the electrical accessory. The positioning hole is used for the positioning convex column to be plugged into.

[0019] Preferably, the elastic member further includes a positioning plug provided on the base portion, and a positioning notch is correspondingly provided on the cover plate. The positioning plug is used for being plugged into the positioning notch.

[0020] The present invention further provides a circuit breaker, which includes the above installation structure, can realize the quick disassembly and assembly of the electrical accessory, avoid excessive extrusion of the electrical accessory, and can ensure the reliable fixation of the electrical accessory.

[0021] A circuit breaker includes the installation structure described in any one of the above, and further includes:

[0022] Electrical accessory;

[0023] A body, and the substrate is fixed to the body;

[0024] An operating mechanism is arranged on the body, and the electrical accessory is used to drive the operating mechanism to close or open.

[0025] Beneficial effects:

[0026] For the installation structure provided by the present invention, the electrical accessory is supported on the substrate. The second end of the fixed shaft penetrates through the cover plate, and then the elastic member is installed at the part where the second end of the fixed shaft penetrates out of the cover plate. The elastic member can provide an elastic force for pressing the cover plate, so that the cover plate presses the electrical accessory on the substrate to realize the fixation of the electrical accessory. By applying a pressing force through the elastic member, on the one hand, it is convenient for the quick disassembly and assembly of the electrical accessory. Compared with the traditional method of applying a fixing force with screws, the elastic force applied by the elastic member not only avoids excessive extrusion of the electrical accessory but also ensures the reliable fixation of the electrical accessory. In addition, the elastic force of the elastic member can be adjusted according to the degree of deformation, which can meet the requirements of changes in the size of the electrical accessory within a certain range, ensuring applicability and use compatibility.

[0027] The circuit breaker provided by the present invention includes the above installation structure, which can realize the quick disassembly and assembly of the electrical accessory, avoid excessive extrusion of the electrical accessory, and ensure the reliable fixation of the electrical accessory. Description of the drawings

[0028] Figure 1 is an exploded schematic view of the installation structure provided by the prior art;

[0029] Figure 2 is a schematic structural view of the installation structure provided by the present invention;

[0030] Figure 3 is an exploded schematic view of the installation structure provided by the present invention;

[0031] Figure 4 is a schematic structural view of the fixed shaft provided by the present invention;

[0032] Figure 5 is a schematic structural view of the cover plate provided by the present invention;

[0033] Figure 6 is a schematic structural view of the elastic member from one perspective provided by the present invention;

[0034] Figure 7 is a schematic structural view of the elastic member from another perspective provided by the present invention;

[0035] Figure 8 is a schematic structural view of the electrical accessory provided by the present invention;

[0036] Figure 9 This is a partial structural schematic diagram of the circuit breaker provided by the present invention.

[0037] In the figure:

[0038] 1', substrate; 2', fixed shaft; 3', cover plate; 4', screw; 5', electrical accessory;

[0039] 1, substrate; 11, mounting hole; 12, assembly groove;

[0040] 2, fixed shaft; 21, embedding groove; 221, first shaft part; 222, second shaft part; 223, limiting platform; 23, mounting head;

[0041] 3, cover plate; 301, through hole; 302, positioning hole; 31, positioning depression; 32, positioning notch; 33, sleeve;

[0042] 4, elastic member; 401, insertion slot; 41, base; 42, elastic arm; 43, abutting head; 44, positioning protrusion; 45, positioning plug; 46, grasping part;

[0043] 5, electrical accessory; 51, positioning convex column; 52, relief groove; 53, push rod; 54, assembly head; 55, support leg;

[0044] 6, body;

[0045] 7, operating mechanism; 71, lever. Detailed implementation mode

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0047] In the description of the present invention, unless otherwise clearly defined 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 integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] In the present invention, 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., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of 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 limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0050] This embodiment provides a mounting structure. Figures 2 to 8 As shown, the mounting structure includes a base plate 1, a fixed shaft 2, a cover plate 3 and an elastic member 4. The base plate 1 is used to support the electrical accessory 5; the first end of the fixed shaft 2 is fixed on the base plate 1; the cover plate 3 is located above the electrical accessory 5, and the second end of the fixed shaft 2 passes through the cover plate 3; the elastic member 4 is provided at the second end of the fixed shaft 2 passing through the cover plate 3, and the elastic member 4 is used to provide a force to press the cover plate 3, so that the cover plate 3 presses the electrical accessory 5 against the base plate 1.

[0051] In this embodiment, the electrical accessory 5 is supported on the base plate 1, the second end of the fixed shaft 2 is passed through the cover plate 3, and then the elastic member 4 is installed to the position where the second end of the fixed shaft 2 passes through the cover plate 3. The elastic member 4 can provide an elastic force to press the cover plate 3, so that the cover plate 3 presses the electrical accessory 5 against the base plate 1 to fix the electrical accessory 5. The elastic member 4 applies a pressing force, which facilitates the rapid disassembly and assembly of the electrical accessory 5. Compared with the traditional screw-applied fixing force, the elastic force applied by the elastic member 4 can avoid excessive squeezing of the electrical accessory 5 and ensure the reliable fixation of the electrical accessory 5. In addition, the elastic force of the elastic member 4 can be adjusted according to the degree of deformation, and can adapt to the requirements of changes in the size of the electrical accessory 5 within a certain range, ensuring applicability and compatibility.

[0052] In this embodiment, the outer peripheral wall of the second end of the fixed shaft 2 is provided with an embedding groove 21, and the elastic member 4 is provided with an insertion groove 401. The embedding groove 21 is located on the side of the cover plate 3 away from the base plate 1, and the elastic member 4 is inserted into the embedding groove 21 through the insertion groove 401. Figure 3 As shown, when the elastic member 4 is installed, the elastic member 4 is alongFigure 3 The arrow direction in the figure is inserted into the slot 21 formed on the fixed shaft 2, forming a fitting similar to a mortise and tenon structure, realizing the effective fixation between the elastic member 4 and the fixed shaft 2, and facilitating disassembly and assembly.

[0053] In this embodiment, the elastic member 4 includes a base portion 41 and at least two elastic arms 42. The elastic arms 42 are provided on the base portion 41. The elastic arms 42 extend obliquely toward the side of the cover plate 3. The extending end of the elastic arm 42 is provided with an abutting head 43 for abutting against the cover plate 3. Two adjacent elastic arms 42 and the base portion 41 together form a plug-in slot 401. Specifically in this embodiment, the number of elastic arms 42 is two, and the plug-in slot 401 is located between the two elastic arms 42. The elastic member 4 and the fixed shaft 2 are inserted into each other. Finally, the abutting head 43 at the end of the elastic arm 42 is in direct contact with the upper end surface of the cover plate 3. The elastic arm 42 provides an elastic force, so that the abutting head 43 presses the electrical accessory 5 against the substrate 1 through the cover plate 3, realizing the fixation of the electrical accessory 5.

[0054] In some other alternative embodiments, the number of elastic arms 42 can also be set to three or more. Among the three or more elastic arms 42, any two adjacent ones and the base portion 41 together form a plug-in slot 401.

[0055] In some alternative embodiments, referring to Figure 3 As shown in the figure, along the axial direction of the fixed shaft 2, a plurality of slots 21 are arranged at intervals. By providing a plurality of slots 21, the elastic arms 42 can select different slots 21 for insertion according to actual needs, thereby realizing height adjustment and adjustment of the elastic force applied to the cover plate 3.

[0056] In this embodiment, the elastic member 4 further includes a positioning protrusion 44. The positioning protrusion 44 is provided on the base portion 41. A positioning recess 31 is correspondingly provided on the upper end surface of the cover plate 3. The positioning protrusion 44 is used to be inserted into the positioning recess 31 when the plug-in slot 401 is inserted into the slot 21. Specifically, in this embodiment, the positioning protrusion 44 is a protrusion structure formed by bending the base portion 41 toward the side of the positioning recess 31. When the position between the elastic member 4 and the cover plate 3 is adjusted in place, the positioning protrusion 44 is inserted into the positioning recess 31 on the cover plate 3, realizing the positioning between the elastic member 4 and the cover plate 3, and avoiding the movement of the elastic member 4 sleeved on the positioning shaft.

[0057] Furthermore, the elastic member 4 further includes a positioning plug 45 provided on the base portion 41. A positioning notch 32 is correspondingly provided on the cover plate 3. The positioning plug 45 is used to be inserted into the positioning notch 32. Specifically, when the position between the elastic member 4 and the cover plate 3 is adjusted in place, the positioning plug 45 is inserted into the positioning notch 32, further realizing the effective positioning between the elastic member 4 and the cover plate 3.

[0058] Furthermore, the elastic member 4 further includes a gripping portion 46 which extends from one end of the base portion 41 and protrudes from the cover plate 3. The gripping portion 46 is provided for an operator to grip the elastic member 4 and apply a pulling force to the elastic member 4.

[0059] Exemplarily, the gripping portion 46 may be a bent structure formed at the end of the base portion 41, facilitating the operator's gripping.

[0060] In this embodiment, the base portion 41, the elastic arms 42, the abutting heads 43, the positioning protrusions 44, the positioning plugs 45 and the gripping portion 46 are integrally formed.

[0061] In this embodiment, the fixed shaft 2 includes a first shaft portion 221 and a second shaft portion 222 which are arranged in a stepped manner in sequence from the first end to the second end. The shaft diameter of the second shaft portion 222 is smaller than that of the first shaft portion 221, and a limiting platform 223 is formed between the first shaft portion 221 and the second shaft portion 222. A sleeve 33 is provided on one side of the cover plate 3 facing the fixed shaft 2. The sleeve 33 is provided with a through hole 301 penetrating to the upper end surface of the cover plate 3. The second shaft portion 222 passes through the through hole 301 and is connected to the elastic member 4, and the sleeve 33 is used for abutting against the limiting platform 223. Specifically, the fixed shaft 2 is arranged as the first shaft portion 221 and the second shaft portion 222 in a stepped shape. When installing the cover plate 3, the fixed shaft 2 is inserted through the cooperation of the second shaft portion 222 and the through hole 301. When the cover plate 3 is installed in place, the sleeve 33 abuts against the limiting platform 223 in a mating manner, providing a reliable and effective support for the cover plate 3 and ensuring the reliable and stable installation of the cover plate 3.

[0062] Furthermore, the second shaft portion 222 is arranged as a non-circular column, and the through hole 301 is a non-circular hole. The shape of the through hole 301 is adapted to that of the second shaft portion 222. Such an arrangement is also to ensure that the cover plate 3 does not deflect between the cover plate 3 and the fixed shaft 2 after the second shaft portion 222 passes through the cover plate 3, ensuring the reliability and effectiveness of the cover plate 3 pressing against the electrical accessory 5, and avoiding the situation that the cover plate 3 and the electrical accessory 5 are offset due to the deflection of the cover plate 3.

[0063] Exemplarily, in this embodiment, the outer circumference of the second shaft portion 222 is jointly enclosed by a first arc surface and a first plane, and the inner peripheral wall of the through hole 301 is jointly enclosed by a second arc surface and a second plane. The first arc surface corresponds to the second arc surface one by one, and the first plane corresponds to the second plane one by one.

[0064] Further, the cover plate 3 is provided with a positioning hole 302, and a positioning stud 51 is correspondingly provided on the upper end face of the electrical accessory 5. The positioning hole 302 is used for the positioning stud 51 to be inserted. Specifically, the mutual cooperation between the positioning hole 302 and the positioning stud 51 can also ensure the reliable positioning between the cover plate 3 and the electrical accessory 5, prevent the cover plate 3 from deflecting with respect to the fixed shaft 2, ensure the reliability and effectiveness of the cover plate 3 pressing against the electrical accessory 5, and avoid the situation where the cover plate 3 and the electrical accessory 5 are misaligned due to the deflection of the cover plate 3.

[0065] Further, at the first end of the fixed shaft 2, that is, at the end of the first shaft portion 221 away from the second shaft portion 222, an installation head 23 is provided. A fixing hole (not shown) is correspondingly provided on the substrate 1. The installation head 23 is fixedly inserted into the fixing hole to achieve the fixed installation between the fixed shaft 2 and the substrate 1. Optionally, an interference fit is provided between the fixing hole and the installation head 23.

[0066] Specifically, a plurality of assembly grooves 12 are provided on the substrate 1, and a plurality of assembly heads 54 are correspondingly provided at the bottom of the electrical accessory 5. When the electrical accessory 5 is installed in place on the substrate 1, the assembly heads 54 are inserted into the corresponding assembly grooves 12 to achieve the fixed installation between the electrical accessory 5 and the substrate 1. Optionally, an interference fit is provided between the assembly grooves 12 and the assembly heads 54.

[0067] This embodiment provides a circuit breaker. Referring to Figures 2 to 9 As shown, the circuit breaker includes the above installation structure, and further includes an electrical accessory 5, a body 6, and an operating mechanism 7. The substrate 1 is fixed to the body 6, the operating mechanism 7 is provided on the body 6, and the electrical accessory 5 is used to drive the operating mechanism 7 to close or open. In this embodiment, the circuit breaker includes the above installation structure, which can achieve the quick disassembly and assembly of the electrical accessory 5, avoid excessive extrusion of the electrical accessory 5, and ensure the reliable fixation of the electrical accessory 5. In addition, the elastic force of the elastic member 4 can be adjusted according to the degree of deformation, which can meet the requirements of changes in the size of the electrical accessory 5 within a certain range, and ensure applicability and use compatibility.

[0068] Specifically, the operating mechanism 7 is located below the substrate 1. An installation hole 11 is provided on the substrate 1, and the lever 71 of the operating mechanism 7 is located in the installation hole 11. A push rod 53 is correspondingly provided at one end of the electrical accessory 5 facing the operating mechanism 7, and the push rod 53 is arranged corresponding to the cylinder rod. Specifically, when the electrical accessory 5 performs an action, the push rod 53 extends out and strikes on the lever 71. When the push rod 53 is too long or the applied force is too large, a reliable and effective buffer can also be provided by the elastic member 4 to ensure that the cylinder rod will not be over-struck and avoid the lever 71 from breaking.

[0069] Further, a relief groove 52 is provided on the side of the electrical accessory 5. The fixed shaft 2 can be placed in the relief groove 52, and the shape of the relief groove 52 is adapted to that of the fixed shaft 2. The provision of the relief groove 52 cooperates with the fixed shaft 2 to form a relief for the fixed shaft 2, avoiding interference with the layout of the positioning shaft 2.

[0070] Specifically, a plurality of support feet 55 are provided at the bottom of the electrical accessory 5. The electrical accessory 5 is supported on the substrate 1 by the support feet 55, which is reliable and stable.

[0071] In summary, for the installation structure and the circuit breaker provided in this embodiment, by providing the elastic member 4 to apply a pressing force on the cover plate 3, finally the cover plate 3 presses the electrical accessory 5 onto the substrate 1 to realize the fixation of the electrical accessory 5. On the one hand, the pressing force applied by the elastic member 4 facilitates the quick disassembly and assembly of the electrical accessory 5. Compared with the traditional screw applying a fixing force, it not only avoids excessive extrusion of the electrical accessory 5 but also ensures the reliable fixation of the electrical accessory 5. In addition, the elastic force of the elastic member 4 can be adjusted according to the degree of deformation, which can meet the requirements of changes in the size of the electrical accessory 5 within a certain range, ensuring applicability and use compatibility.

[0072] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An installation structure, characterized in that, Comprising: A substrate (1) for supporting an electrical accessory (5); A fixed shaft (2), the first end of the fixed shaft (2) being fixed to the substrate (1); A cover plate (3) located above the electrical accessory (5), the second end of the fixed shaft (2) passing through the cover plate (3); An elastic member (4) provided at the second end of the fixed shaft (2) passing through the cover plate (3), the elastic member (4) being used to provide a force for pressing against the cover plate (3) so that the cover plate (3) presses the electrical accessory (5) against the substrate (1).

2. The installation structure according to claim 1, characterized in that A groove (21) is formed on the outer peripheral wall of the second end of the fixed shaft (2), and the elastic member (4) is provided with a plug-in groove (401). The groove (21) is located on the side of the cover plate (3) facing away from the substrate (1), and the elastic member (4) is plugged into the groove (21) through the plug-in groove (401).

3. The installation structure according to claim 2, characterized in that, Along the axial direction of the fixed shaft (2), a plurality of the grooves (21) are arranged at intervals.

4. The mounting structure according to claim 2, wherein The elastic member (4) includes a base portion (41) and at least two elastic arms (42). The elastic arms (42) are provided on the base portion (41). The elastic arms (42) extend obliquely towards the cover plate (3). A contact head (43) for abutting against the cover plate (3) is provided at the extending end of the elastic arms (42). Adjacent two of the elastic arms (42) and the base portion (41) together form the plug-in groove (401).

5. The mounting structure according to claim 4, characterized in that, The elastic member (4) further includes a positioning protrusion (44). The positioning protrusion (44) is provided on the base portion (41). A positioning recess (31) is correspondingly provided on the upper end surface of the cover plate (3). The positioning protrusion (44) is used for being plugged into the positioning recess (31) when the plug-in groove (401) is plugged into the groove (21).

6. The installation structure according to claim 1, characterized in that, The fixed shaft (2) includes a first shaft portion (221) and a second shaft portion (222) which are sequentially arranged in a stepped manner from the first end to the second end. The shaft diameter of the second shaft portion (222) is smaller than that of the first shaft portion (221). A limiting platform (223) is formed between the first shaft portion (221) and the second shaft portion (222); A sleeve (33) is provided on the side of the cover plate (3) facing the fixed shaft (2). The sleeve (33) is provided with a through hole (301) penetrating to the upper end surface of the cover plate (3). The second shaft portion (222) passes through the through hole (301) and is connected to the elastic member (4), and one end of the sleeve (33) facing away from the cover plate (3) abuts against the limiting platform (223).

7. The installation structure according to claim 6, characterized in that, The second shaft portion (222) is provided as a non-circular column, and the through hole (301) is a non-circular hole. The shape of the through hole (301) is adapted to that of the second shaft portion (222).

8. The mounting structure according to claim 1, characterized in that, The cover plate (3) is provided with a positioning hole (302). A positioning convex column (51) is correspondingly provided on the upper end surface of the electrical accessory (5). The positioning hole (302) is used for the positioning convex column (51) to be plugged in.

9. The installation structure according to claim 1, characterized in that, The elastic member (4) further includes a positioning plug (45) provided on the base portion (41), and a positioning notch (32) is correspondingly provided on the cover plate (3). The positioning plug (45) is used for plugging into the positioning notch (32).

10. A circuit breaker, characterized in that, Comprising the mounting structure according to any one of claims 1-9, further comprising: Electrical accessory (5); Body (6), the substrate (1) is fixed on the body (6); Operating mechanism (7), provided on the body (6), and the electrical accessory (5) is used for driving the operating mechanism (7) to close or open.

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