Plug-in circuit breaker

Abstract

The utility model discloses a plug-in circuit breaker, and relates to the technical field of low-voltage electric appliances. The plug-in circuit breaker comprises a shell, the shell is provided with an operation end and a plugging end in the length direction of the shell, the operation end is provided with two plugging arms at intervals in the width direction of the shell, the operation end is provided with a button hole and a wiring hole at intervals in the height direction of the shell, and an operation button sliding in the length direction is assembled in the button hole. The wiring hole is used for a lead to pass through so as to be connected with a wiring terminal in the shell; the operation end is further provided with a protection part, the protection part is located between the two plugging arms in the width direction and located between the button hole and the wiring hole in the height direction, and the protection part extends in the length direction to be attached to the surface of the operation end, so that the button hole and the wiring hole are separated through the protection part. The plug-in circuit breaker can solve the problem in the prior art that the reliability of switching-on and switching-off of the plug-in circuit breaker is affected due to the fact that a wire is easily clamped between the two plug-pull arms during wiring.

Description

Technical Field

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

[0002] With the rapid development of social economy and urban construction, people's living standards and housing standards have been significantly improved, and they have a more comprehensive understanding of electricity safety. In order to increase the safety of electricity use, circuit breakers are usually connected to the power circuit. Circuit breakers refer to switching devices that can close, carry and disconnect currents under normal circuit conditions and close, carry and disconnect currents under abnormal circuit conditions within a specified time.

[0003] Circuit breakers in the prior art can be divided into plug-in circuit breakers, fixed circuit breakers and drawer-type circuit breakers according to their installation methods. Among them, the plug-in circuit breaker has an operating end and a plug-in end. Generally, the operating end of the plug-in circuit breaker is provided with an operating button and a wiring terminal, and the plug-in end of the plug-in circuit breaker is provided with a wiring socket, which is connected to the wire through the wiring terminal and plugged into the cabinet through the wiring socket, so as to connect the plug-in circuit breaker to the power circuit.

[0004] On this basis, in order to facilitate the insertion or extraction of the plug-in end into or out of the cabinet, two plug-in arms are usually provided at the operating end, so that the user can apply the force of insertion or extraction to the plug-in circuit breaker through the plug-in arms. However, this structure has the following disadvantages: when wiring the terminal, once the wire is twisted, it is easy to get stuck between the two plug-in arms, affecting the normal movement of the operating button relative to the operating end, and then affecting the reliability of the opening and closing of the plug-in circuit breaker. Utility Model Content

[0005] The utility model aims to provide a plug-in circuit breaker, which can solve the problem in the prior art that the wire is easily stuck between two plug-in arms during wiring, thus affecting the reliability of the plug-in circuit breaker in opening and closing.

[0006] The embodiment of the utility model is achieved as follows:

[0007] The utility model provides a plug-in circuit breaker, including a shell, the shell having an operating end and a plug-in end along the length direction of the shell, the operating end having two plug-in arms spaced apart along the width direction of the shell, the operating end having a button hole and a wiring hole spaced apart along the height direction of the shell, the button hole being equipped with an operating button that slides along the length direction, the wiring hole being used for a wire to pass through to connect with a wiring terminal in the shell; wherein the operating end is also provided with a protective member, the protective member being located between the two plug-in arms along the width direction and between the button hole and the wiring hole along the height direction, the protective member extending along the length direction to fit with the surface of the operating end, so as to separate the button hole and the wiring hole through the protective member. The plug-in circuit breaker can solve the problem in the prior art that the wire is easily stuck between the two plug-in arms during wiring, thus affecting the reliability of the opening and closing of the plug-in circuit breaker.

[0008] Optionally, a first clamping portion is provided on the plug-in arm, and a second clamping portion is provided on the protective member, and the first clamping portion is clamped with the second clamping portion so that the protective member is detachably connected to the plug-in arm.

[0009] Optionally, the first clamping portion is a clamping platform, and the second clamping portion is a clamping slot corresponding to the clamping platform; or, the first clamping portion is a clamping slot, and the second clamping portion is a clamping platform corresponding to the clamping slot.

[0010] Optionally, a first limiting portion is further provided on the plug-in arm, and a second limiting portion is further provided on the protective member. The first clamping portion and the second clamping portion slide relatively to each other until the first limiting portion and the second limiting portion are clamped to lock the protective member and the plug-in arm.

[0011] Optionally, the first limiting portion is a through hole, and the second limiting portion is a protrusion corresponding to the through hole; or, the first limiting portion is a protrusion, and the second limiting portion is a through hole corresponding to the protrusion.

[0012] Optionally, along the height direction, the lower surface of the plug-in arm is located between the button hole and the wiring hole, and the lower surface of the protective element is flush with the lower surface of the plug-in arm.

[0013] Optionally, the shell includes a first sub-shell and a second sub-shell, and the protective piece includes a first sub-protective piece and a second sub-protective piece, the first sub-protective piece is fixedly arranged on the first sub-shell, the second sub-protective piece is fixedly arranged on the second sub-shell, the first sub-shell and the second sub-shell are buckled with each other, and the first sub-protective piece and the second sub-protective piece are spliced ​​to form the protective piece.

[0014] Optionally, a gripping portion is provided on the side of the operation button away from the button hole, and the gripping portion extends toward the side away from the protective member. The upper surface of the gripping portion along the height direction is lower than the upper surface of the shell, and the width of the gripping portion along the width direction is smaller than the width of the protective member.

[0015] Optionally, an indicator window is provided on a side of the operation button away from the button hole, so that an indicator in the shell for indicating the opening and closing status of the plug-in circuit breaker is exposed through the indicator window, and the upper surface of the protective member along the height direction is lower than the lower surface of the indicator window.

[0016] Optionally, the protective element is made of a light-transmitting material.

[0017] The beneficial effects of the embodiments of the utility model include:

[0018] The plug-in circuit breaker comprises a shell, which has an operating end and a plug-in end along the length direction of the shell, and two plug-in arms are arranged at intervals at the operating end along the width direction of the shell, so that the plug-in end can be correspondingly inserted into or pulled out of the cabinet by pressing or pulling the plug-in arms on the side where the operating end is located, and a button hole and a wiring hole are arranged at intervals at the operating end along the height direction of the shell, and an operating button that slides along the length direction is equipped in the button hole, and the wiring hole is used for the wire to pass through to connect with the wiring terminal in the shell, so that the plug-in circuit breaker is connected to the power circuit, and the operating button is linked with the operating mechanism and the contact mechanism inside the shell, so that when the operating button is driven to slide relative to the button hole, the plug-in circuit breaker can be opened and closed, so as to disconnect or connect the power circuit; wherein, the operating end is also provided with a protective member, which is located between the two plug-in arms along the width direction and between the button hole and the wiring hole along the height direction, and the protective member extends along the length direction to fit with the surface of the operating end, so that the button hole and the wiring hole are separated by the protective member. In this way, even if the wire is twisted and stuck between the two plug-in arms in the width direction, it will not pass over the protective part in the height direction and enter the movement path of the operating button relative to the button hole. Instead, it will be blocked by the protective part within the space formed by the two plug-in arms and the lower surface of the protective part (the side close to the wiring hole), thereby avoiding affecting the normal movement of the operating button relative to the operating end, and further avoiding affecting the reliability of the opening and closing of the plug-in circuit breaker, thereby improving the safety of the use of the plug-in circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 One of the structural schematic diagrams of the plug-in circuit breaker provided in the embodiment of the utility model;

[0021] Figure 2 The second structural schematic diagram of the plug-in circuit breaker provided by the embodiment of the utility model;

[0022] Figure 3 The third structural diagram of the plug-in circuit breaker provided by the embodiment of the utility model;

[0023] Figure 4 A fourth structural diagram of a plug-in circuit breaker provided in an embodiment of the utility model;

[0024] Figure 5 A fifth structural diagram of a plug-in circuit breaker provided in an embodiment of the utility model;

[0025] Figure 6 A sixth structural diagram of a plug-in circuit breaker provided in an embodiment of the utility model;

[0026] Figure 7 The seventh structural schematic diagram of the plug-in circuit breaker provided in the embodiment of the utility model.

[0027] Icon: 100-plug-in circuit breaker; 10-housing; 10a-first subhousing; 10b-second subhousing; 11-operating end; 111-plug-in arm; 1111-first clamping portion; 1112-first limiting portion; 112-button hole; 113-wiring hole; 114-protective member; 1141-second clamping portion; 1142-second limiting portion; 12-plug-in end; 20-operating button; 21-gripping portion; 22-indicator window; x-length direction; y-width direction; z-height direction. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Please refer to Figures 1 to 7The present application provides a plug-in circuit breaker 100, comprising a housing 10, wherein the housing 10 has an operating end 11 and a plug-in end 12 along a length direction x of the housing 10, wherein the operating end 11 is provided with two plug-in arms 111 at intervals along a width direction y of the housing 10, and the operating end 11 is provided with a button hole 112 and a wiring hole 113 at intervals along a height direction z of the housing 10, wherein an operating button 20 sliding along the length direction x is assembled in the button hole 112, and the wiring hole 113 is used for a wire to pass through so as to be connected to a wiring terminal in the housing 10; wherein the operating end 11 is further provided with a protective member 114, wherein the protective member 114 is located between the two plug-in arms 111 along the width direction y and between the button hole 112 and the wiring hole 113 along the height direction z, and wherein the protective member 114 extends along the length direction x to be in contact with a surface of the operating end 11, so as to separate the button hole 112 and the wiring hole 113 through the protective member 114. The plug-in circuit breaker 100 can solve the problem in the prior art that the wires are easily stuck between the two plug-in arms 111 during wiring, which affects the reliability of the plug-in circuit breaker 100 when opening and closing the circuit breaker 100 .

[0035] It should be noted that the plug-in circuit breaker 100 includes a housing 10, and components such as an operating mechanism, a contact mechanism, and an arc extinguishing mechanism can be accommodated in the housing 10, so that the housing 10 supports and protects each component. Figure 1 As shown, the housing 10 is a rectangular parallelepiped structure. The housing 10 has an operating end 11 and a plug-in end 12 along the length direction x. The operating end 11 is provided with a button hole 112 and a wiring hole 113 at intervals along the height direction z. The operating button 20 is slidably assembled in the button hole 112 along the length direction x. The wire passes through the wiring hole 113 and extends into the housing 10 to be connected with the wiring terminal. The plug-in end 12 is provided with a wiring socket to be plugged into the cabinet through the wiring socket, so that the plug-in circuit breaker 100 is connected to the power circuit. The operating button 20 is linked with the operating mechanism and the contact mechanism inside the housing 10, so that when the operating button 20 is driven to slide relative to the button hole 112, the plug-in circuit breaker 100 can be opened and closed, thereby disconnecting or connecting the power circuit.

[0036] On this basis, in order to facilitate the user to apply the force of insertion or removal to the plug-in circuit breaker 100 through the operating end 11, so that the plug-in end 12 is correspondingly inserted into or removed from the cabinet, such as Figures 2 to 4As shown, two plug-in arms 111 are arranged at intervals along the width direction y at the operating end 11, so as to increase the force application points through the plug-in arms 111, thereby, the user can drive the plug-in end 12 to be inserted into or pulled out of the cabinet by pressing or pulling the plug-in arm 111 on the side where the operating end 11 is located. However, this design has the following disadvantages: when wiring the terminal through the wire, once the wire is twisted, it is easy to get stuck between the two plug-in arms 111, affecting the normal movement of the operating button 20 relative to the operating end 11, and then affecting the reliability of the opening and closing of the plug-in circuit breaker 100.

[0037] In order to solve the above problems, Figures 1 to 6 As shown, the plug-in circuit breaker 100 provided in the present application is further provided with a protective member 114 at the operating end 11, the protective member 114 is located between the two plug-in arms 111 along the width direction y, and is located between the button hole 112 and the wiring hole 113 along the height direction z, and the protective member 114 extends along the length direction x to fit with the surface of the operating end 11 away from the plug-in end 12, so as to separate the button hole 112 and the wiring hole 113 by the protective member 114. In this way, even if the wire is twisted and stuck between the two plug-in arms 111 along the width direction y, it will not pass over the protective member 114 along the height direction z and enter the movement path of the operating button 20 relative to the button hole 112, but will be blocked by the protective member 114 within the space formed by the two plug-in arms 111 and the lower surface of the protective member 114 (the side close to the wiring hole 113), thereby avoiding affecting the normal movement of the operating button 20 relative to the operating end 11, and further avoiding affecting the reliability of the opening and closing of the plug-in circuit breaker 100, thereby improving the safety of the plug-in circuit breaker 100.

[0038] Furthermore, the plug arm 111 is provided with a first clamping portion 1111, and the protective member 114 is provided with a second clamping portion 1141. The first clamping portion 1111 is clamped with the second clamping portion 1141, so that the protective member 114 and the plug arm 111 are detachably connected, thereby improving the convenience of assembling the protective member 114 and the housing 10. For example, Figure 4 As shown, in this embodiment, the first clamping portion 1111 is a clamping platform, and the second clamping portion 1141 is a clamping slot corresponding to the clamping platform; or, in other embodiments, the first clamping portion 1111 can also be a clamping slot, and the second clamping portion 1141 can be a clamping platform corresponding to the clamping slot. In order to facilitate the clamping of the protective member 114 between the two plug-in arms 111, the first clamping portion 1111 and the second clamping portion 1141 can also be provided with mutually cooperating guide structures, such as guide slopes, etc.

[0039] Furthermore, a first limiting portion 1112 is provided on the plug-in arm 111, and a second limiting portion 1142 is provided on the protective member 114. The first clamping portion 1111 and the second clamping portion 1141 slide relatively to the first limiting portion 1112 and the second limiting portion 1142 to clamp the protective member 114 and lock the plug-in arm 111. When the protective member 114 and the plug-in arm 111 are installed in place, the protective member 114 can always remain in the locked state without the protective member 114 sliding in the opposite direction along the length direction x, thereby preventing the protective member 114 from failing to completely separate the button hole 112 and the wiring hole 113, and the wire enters the movement path of the operating button 20 relative to the button hole 112 through the gap between the side of the protective member 114 close to the operating end 11 and the surface of the operating end 11, thereby ultimately affecting the opening and closing operation of the plug-in circuit breaker 100.

[0040] For example, Figure 4 As shown, in this embodiment, the first limiting portion 1112 is a through hole, and the second limiting portion 1142 is a protrusion corresponding to the through hole; or, in other embodiments, the first limiting portion 1112 may be a protrusion, and the second limiting portion 1142 may be a through hole corresponding to the protrusion. In order to facilitate the locking of the first limiting portion 1112 and the second limiting portion 1142, the first limiting portion 1112 and the second limiting portion 1142 may also be provided with mutually cooperating guide structures, such as guide slopes.

[0041] like Figure 4 As shown, the protective member 114 slides relative to the plug-in arm 111 along the length direction x, and the protective member 114 can be inserted between the two plug-in arms 111 through the joint action of the first clamping portion 1111 and the second clamping portion 1141 until the side of the protective member 114 close to the operating end 11 is in contact with the surface of the operating end 11. Figure 3 As shown, at this time, the protective member 114 and the plug-in arm 111 are installed in place, and the protective member 114 and the plug-in arm 111 can be locked by the joint action of the first limiting portion 1112 and the second limiting portion 1142. In this way, the protective member 114 can always maintain a locked state in which the side surface close to the operating end 11 and the surface of the operating end 11 are in contact with each other. In other words, there will be no gap between the side surface of the protective member 114 close to the operating end 11 and the surface of the operating end 11, thereby preventing the wire from entering the movement path of the operating button 20 relative to the button hole 112 through the gap, ultimately affecting the opening and closing operation of the plug-in circuit breaker 100.

[0042] Although under the action of the protective member 114, even if the wire is twisted, it will not pass through the protective member 114 and enter the movement path of the operation button 20 relative to the button hole 112, but will be blocked by the protective member 114 within the space formed by the two plug-in arms 111 and the lower surface of the protective member 114 (the side close to the wiring hole 113). However, it will also affect the reliability of the connection between the wire and the wiring terminal to a certain extent. In order to solve this problem, Figure 5 and Figure 6 As shown, in this embodiment, the lower surface of the plug arm 111 is located between the button hole 112 and the wiring hole 113 along the height direction z, and the lower surface of the protective member 114 is flush with the lower surface of the plug arm 111 .

[0043] In addition to the above-mentioned setting form in which the protective member 114 is detachably connected to the plug arm 111, in other embodiments, the protective member 114 can also be directly fixed on the plug arm 111. Specifically, the housing 10 includes a first sub-housing 10a and a second sub-housing 10b, and the protective member 114 includes a first sub-protective member and a second sub-protective member, the first sub-protective member is fixedly arranged on the first sub-housing 10a, and the second sub-protective member is fixedly arranged on the second sub-housing 10b, the first sub-housing 10a and the second sub-housing 10b are mutually buckled to form a receiving space for accommodating various components, and the first sub-protective member and the second sub-protective member are spliced ​​to form the protective member 114 to play a protective role in separating the button hole 112 and the wiring hole 113.

[0044] Regarding the two different connection forms between the protective member 114 and the plug arm 111 , in actual application, those skilled in the art should be able to make reasonable selections and designs according to actual conditions, and no specific restrictions are made here.

[0045] Alternatively, if Figure 2 , Figure 6 and Figure 7 As shown, a grip portion 21 is provided on the side of the operation button 20 away from the button hole 112, so that the user can easily drive the operation button 20 to slide relative to the button hole 112 by pressing or pulling the operation button 20 through the grip portion 21. When designing the grip portion 21, it is only necessary to make the grip portion 21 extend toward the side away from the protective member 114, the upper surface of the grip portion 21 along the height direction z is lower than the upper surface of the housing 10, and the width of the grip portion 21 along the width direction y is less than the width of the protective member 114.

[0046] For example, Figure 7 As shown, in this embodiment, the height difference between the upper surface of the grip portion 21 and the upper surface of the housing 10 is ΔThe smaller H is, the better, so as to increase the holding area of ​​the holding portion 21 as much as possible without affecting the assembly of the plug-in circuit breaker 100 and the cabinet, so as to facilitate the user to apply force to the operating button 20 through the holding portion 21. In addition, the width of the holding portion 21 along the width direction y must be smaller than the width of the protective member 114, wherein the width of the protective member 114 is almost equal to the distance between the two plug-in arms 111. The advantage of such a design is that the sliding of the operating button 20 will not be affected by the two plug-in arms 111, thereby improving the reliability of the opening and closing of the plug-in circuit breaker 100.

[0047] Alternatively, if Figure 6 As shown, an indication window 22 is provided on one side of the operation button 20 away from the button hole 112, so that the indicator for indicating the opening and closing state of the plug-in circuit breaker 100 in the housing 10 is exposed through the indication window 22, and the upper surface of the protective member 114 is lower than the lower surface of the indication window 22 along the height direction z. For example, in this embodiment, the height difference between the upper surface of the protective member 114 and the lower surface of the indication window 22 is Δ The larger h is, the better, so as to avoid the protective member 114 blocking the indicator window 22, thereby affecting the user's observation of the indicator through the indicator window 22 and thereby determining whether the plug-in circuit breaker 100 is in the closed state or the open state.

[0048] Optionally, the material of the protective member 114 is a light-transmitting material, for example, the protective member 114 is made of plastic, glass or other materials, so as to prevent the protective member 114 from shielding the operating button 20 and the wiring hole 113, thereby affecting the sliding of the operating button 20 along the button hole 112 and guiding it to connect with the wiring terminal through the wiring hole 113.

[0049] The above description is only an optional embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0050] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

Claims

1. A plug-in circuit breaker, characterized in that: The invention comprises a housing (10), wherein the housing (10) has an operating end (11) and a plug-in end (12) along a length direction (x) of the housing (10), wherein the operating end (11) is provided with two plug-in arms (111) at intervals along a width direction (y) of the housing (10), and wherein the operating end (11) is provided with a button hole (112) and a wiring hole (113) at intervals along a height direction (z) of the housing (10), wherein an operating button (20) sliding along the length direction (x) is mounted in the button hole (112), and wherein the wiring hole (113) is used for a wire to pass through so as to be connected to a wiring terminal in the housing (10); The operating end (11) is further provided with a protective member (114), the protective member (114) being located between the two plug-in arms (111) along the width direction (y) and between the button hole (112) and the wiring hole (113) along the height direction (z), and the protective member (114) extending along the length direction (x) to be in contact with the surface of the operating end (11), so as to separate the button hole (112) and the wiring hole (113) through the protective member (114).

2. The plug-in circuit breaker according to claim 1, characterized in that The plug-in arm (111) is provided with a first clamping portion (1111), and the protective member (114) is provided with a second clamping portion (1141); the first clamping portion (1111) is clamped with the second clamping portion (1141) so that the protective member (114) and the plug-in arm (111) are detachably connected.

3. The plug-in circuit breaker according to claim 2, characterized in that The first clamping portion (1111) is a clamping platform, and the second clamping portion (1141) is a clamping slot corresponding to the clamping platform; or the first clamping portion (1111) is a clamping slot, and the second clamping portion (1141) is a clamping platform corresponding to the clamping slot.

4. The plug-in circuit breaker according to claim 2, characterized in that The plug-in arm (111) is also provided with a first limiting portion (1112), and the protective member (114) is also provided with a second limiting portion (1142); the first clamping portion (1111) and the second clamping portion (1141) slide relatively to each other until the first limiting portion (1112) and the second limiting portion (1142) are clamped, so that the protective member (114) and the plug-in arm (111) are locked.

5. The plug-in circuit breaker according to claim 4, characterized in that The first limiting portion (1112) is a through hole, and the second limiting portion (1142) is a protrusion corresponding to the through hole; or, the first limiting portion (1112) is a protrusion, and the second limiting portion (1142) is a through hole corresponding to the protrusion.

6. The plug-in circuit breaker according to claim 1, characterized in that Along the height direction (z), the lower surface of the plug-in arm (111) is located between the button hole (112) and the wiring hole (113), and the lower surface of the protective member (114) is flush with the lower surface of the plug-in arm (111).

7. The plug-in circuit breaker according to claim 1, characterized in that The shell (10) includes a first sub-shell (10a) and a second sub-shell (10b); the protective element (114) includes a first sub-protective element and a second sub-protective element; the first sub-protective element is fixedly arranged on the first sub-shell (10a); the second sub-protective element is fixedly arranged on the second sub-shell (10b); the first sub-shell (10a) and the second sub-shell (10b) are interlocked; the first sub-protective element and the second sub-protective element are spliced ​​to form the protective element (114).

8. The plug-in circuit breaker according to claim 1, characterized in that A gripping portion (21) is provided on a side of the operating button (20) away from the button hole (112), and the gripping portion (21) extends toward a side away from the protective member (114). An upper surface of the gripping portion (21) along the height direction (z) is lower than an upper surface of the shell (10), and a width of the gripping portion (21) along the width direction (y) is smaller than a width of the protective member (114).

9. The plug-in circuit breaker according to claim 1, characterized in that An indication window (22) is provided on a side of the operating button (20) away from the button hole (112) so that an indication member in the housing (10) for indicating the opening and closing state of the plug-in circuit breaker (100) is exposed through the indication window (22); and an upper surface of the protective member (114) along the height direction (z) is lower than a lower surface of the indication window (22).

10. The plug-in circuit breaker according to claim 1, characterized in that The material of the protective element (114) is a light-transmitting material.

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