Circuit breaker

Abstract

The utility model provides a circuit breaker, comprising a housing comprising a lead through hole; a wiring groove disposed in the housing and formed in a tubular shape with openings at both ends, the wiring groove including an upper surface and a lower surface facing each other, the upper surface including a threaded hole; a tab fixed within the housing and including a wiring portion disposed between an upper surface and a lower surface of the wiring groove; an indicator including an indication portion visible from the outside through an indication through hole of the housing and movable in the indication through hole; and a first elastic member that biases the indicating portion of the indicating member toward the first indicating position, in which the wiring groove moves upward with respect to the housing as the screw is tightened, such that the distance between the wiring portion of the lug plate and the lower surface of the wiring groove is reduced, thereby being able to compress the wire, and to prevent the wire from being damaged. And the position of the indicating part of the indicating piece in the indicating through hole is changed according to the movement of the wiring groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit breaker capable of indicating screw torque. BACKGROUND

[0002] For the circuit breaker using screw tightening to realize wiring, it is necessary to apply sufficient torque to tighten the screw to a sufficient degree to realize correct wiring. If the screw torque does not reach the nominal torque, it will cause poor contact between the conductor and the terminal of the circuit breaker, thereby causing the conductor to heat up and even burn out. Therefore, a circuit breaker capable of indicating screw torque is needed, according to which it can be known whether the screw torque reaches the nominal torque and whether the applied torque is sufficient, thereby avoiding the problem of conductor heating and burning out. SUMMARY

[0003] Therefore, in view of the above problems, the utility model provides a circuit breaker, which comprises: a housing comprising a conductor through hole for inserting a conductor into the housing along a first direction; a wiring slot arranged in the housing and formed into a tubular shape with two ends open to each other along the first direction, the openings of the tubular shape being in communication with the conductor through hole, the wiring slot comprising an upper surface and a lower surface opposite to each other along a second direction perpendicular to the first direction, the upper surface comprising a threaded hole for screwing in; a terminal fixed in the housing and comprising a terminal part, the terminal part extending along the first direction and being arranged between the upper surface and the lower surface of the wiring slot; an indicating member comprising an indicating part visible from outside through an indicating through hole of the housing and movable in the indicating through hole; and a first elastic member biasing the indicating part of the indicating member towards a first indicating position, wherein as the screw is tightened, the wiring slot moves upward relative to the housing, so that the distance between the terminal part of the terminal and the lower surface of the wiring slot decreases, thereby being able to compress the conductor, and the position of the indicating part of the indicating member in the indicating through hole changes according to the movement of the wiring slot, when the screw is not screwed in, the indicating part is located at the first indicating position, and when the torque of the screw reaches a predetermined torque, the indicating part is located at a second indicating position.

[0004] In an embodiment, the circuit breaker further comprises: a blocking member arranged between the upper surface of the wiring slot and the terminal part of the terminal and comprising a main body and a protrusion extending from the main body; and a second elastic member arranged between the blocking member and the terminal part, wherein the indicating member is pivotally mounted to the housing and comprises a fitting part, the fitting part being in contact with the protrusion of the blocking member, as the screw is tightened, the blocking member moves downward to compress the second elastic member, while pushing the fitting part of the indicating member through the protrusion to pivot the indicating member, thereby moving the indicating part of the indicating member in the indicating through hole.

[0005] In an embodiment, the housing further comprises an internal protrusion protruding from an inner wall of the housing toward an internal space of the housing, the upper surface of the blocking member is in contact with a lower surface of the internal protrusion when the screw is not screwed in, and the second elastic member is in an uncompressed state.

[0006] In an embodiment, the circuit breaker further comprises one or more spacers disposed between the blocking member and the second elastic member.

[0007] In an embodiment, the indicating member comprises an indicating arm and a cooperating arm extending away from the pivot axis in different directions, the indicating portion is disposed at a free end of the indicating arm, and the cooperating portion is comprised in the cooperating arm.

[0008] In an embodiment, the wiring slot comprises a through hole for the protrusion of the blocking member to pass through, the through hole is larger in size than the protrusion so that the blocking member is movable relative to the wiring slot in the second direction.

[0009] In an embodiment, the protrusion of the blocking member extends from the main body in a third direction perpendicular to the first direction and the second direction, and the indicating member is pivoted about the third direction.

[0010] In an embodiment, the second elastic member is a disc spring.

[0011] In an embodiment, the disc spring comprises two groups of disc springs of the same number and opposite to each other, each group of disc springs comprises one or more disc springs.

[0012] In an embodiment, the circuit breaker further comprises a printed circuit board fixed inside the housing, a first conductive element mounted on the printed circuit board, and a second conductive element separate from the first conductive element and electrically connected to the printed circuit board through an additional wire, wherein the indicating member further comprises a connecting portion, the second conductive element is fixed to the connecting portion, when the torque of the screw reaches the predetermined torque, the connecting portion of the indicating member moves to a position where the second conductive element is in contact with the first conductive element, thereby generating an indication signal, the indication signal is output to the outside of the circuit breaker through a circuit in the printed circuit board.

[0013] In an embodiment, the indicating through hole is disposed on a surface of the housing on which the screw is mounted.

[0014] In an embodiment, when the screw is not screwed in, the first indicating position of the indicating portion of the indicating member is at a first edge of the indicating through hole, and when the torque of the screw reaches the predetermined torque, the second indicating position of the indicating portion is at a second edge of the indicating through hole opposite to the first edge.

[0015] In an embodiment, the first elastic member is a leaf spring.

[0016] The circuit breaker structure of this utility model not only enables the product to provide a clear torque indication on-site during wiring, but also allows for real-time monitoring of screw torque both on-site and remotely during daily use. In particular, remote monitoring can provide timely warnings when the screw torque is less than the preset value, thus preventing accidents. Attached Figure Description

[0017] The above and other features and advantages of exemplary embodiments of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, which are for illustrative purposes only and are not intended to limit the scope of the present invention in any way, wherein:

[0018] Figure 1 This is a perspective view showing a circuit breaker according to an embodiment of the present invention.

[0019] Figure 2 This is a partial perspective view showing a circuit breaker according to an embodiment of the present invention.

[0020] Figure 3A and Figure 3B These are a partial perspective view and a partial sectional view of a circuit breaker according to an embodiment of the present invention.

[0021] Figure 4 This is a partial perspective view showing a circuit breaker according to an embodiment of the present invention.

[0022] Figure 5A and Figure 5B This is a partial perspective view showing a circuit breaker in a first state according to an embodiment of the present invention.

[0023] Figure 6A and Figure 6B This is a partial perspective view showing a circuit breaker in a second state according to an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0025] Compared with the embodiments shown in the drawings, the feasible implementation within the protection scope of the present disclosure can have fewer components, have other components not shown in the drawings, have different components, have differently arranged components, or have differently connected components, etc. In addition, two or more components in the drawings can be implemented in a single component, or a single component shown in the drawings can be implemented as a plurality of separate components.

[0026] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first", "second", and similar terms used herein do not necessarily have any order, number, or importance, but are used to distinguish different components. When the number of components is not specified, the number of components can be one or more; similarly, the terms "one", "said", "the", and the like do not necessarily mean a quantity limit. The terms "include" or "contain" and the like mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "mount", "set", "connect", or "connect" and the like are not limited to physical or mechanical mounting, setting, connection, but can include electrical mounting, setting, connection, whether direct or indirect. The terms "up", "down", "left", "right", and the like only represent the relative positional relationship of the device in use or the positional relationship shown in the drawings, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] Figure 1 is a perspective view showing a circuit breaker according to an embodiment of the present disclosure. Figure 2 is a partial perspective view showing a circuit breaker according to an embodiment of the present disclosure. Figure 3A and Figure 3B are a partial perspective view and a partial cross-sectional view, respectively, showing a circuit breaker according to an embodiment of the present disclosure.

[0028] Referring to Figures 1 to 3B , the circuit breaker 1 according to an embodiment of the present disclosure can include a housing 10, a terminal slot 20, a terminal tab 30, an indicator 40, and a first elastic member 50.

[0029] The housing 10 can include a wire through-hole 11 extending through a wall of the housing 10 in a first direction for a wire (not shown) to be inserted into the housing 10. A wire slot 20 can be provided in the housing 10 and can be formed in a tubular shape with both ends open in the first direction, the openings of the tubular shape can communicate with the wire through-hole 11. The wire slot 20 can include an upper face 21 and a lower face 22 opposite to each other in a second direction perpendicular to the first direction, the upper face 21 includes a threaded hole for a screw 60 to be screwed in. A wire lug 30 can be fixed in the housing 10 and can include a wire portion 31. The wire portion 31 can extend in the first direction and can be disposed between the upper face 21 and the lower face 22 of the wire slot 20. An indicator 40 can include an indicator portion 41 visible from the outside through an indicator through-hole 12 of the housing 10 and movable in the indicator through-hole 12. A first elastic member 50 can bias the indicator portion 41 of the indicator 40 toward a first indicator position. As the screw 60 is tightened, the wire slot 20 can move upward relative to the housing 10, so that the distance between the wire portion 31 of the wire lug 30 and the lower face 22 of the wire slot 20 is reduced, thereby enabling the wire to be compressed. The position of the indicator portion 41 in the indicator through-hole 12 can change according to the movement of the wire slot 20. When the screw 60 is not screwed in, the indicator portion 41 can be located at the first indicator position. When the torque of the screw 60 reaches a predetermined torque, the indicator portion 41 can be located at a second indicator position.

[0030] The circuit breaker 1 according to an embodiment of the present application can include an indicator portion 41 that moves according to the torque of the screw and is visible from the outside, by observing the position of the indicator portion 41 in the indicator through-hole 12 from the outside of the circuit breaker 1, it can be determined whether the screw 60 reaches a predetermined torque. According to an embodiment of the present application, the indicator through-hole 12 can be provided on the surface of the housing 10 on which the screw 60 is mounted, thereby facilitating the user to observe the position of the indicator portion 41 while tightening the screw.

[0031] According to an embodiment of the present application, the indicator portion 41 can be directly exposed to the outside through the indicator through-hole 12. In this case, in order to avoid the user from touching the indicator portion 41 and causing an electric shock accident, the indicator 40 can be formed of an insulating material. However, the present application is not limited thereto. For example, the indicator through-hole 12 can be covered by a transparent plate to separate the indicator portion 41 from the outside of the circuit breaker 1.

[0032] According to an embodiment of the present application, the indicating through hole 12 can be formed in a rectangular shape. However, the present application is not limited thereto, and the indicating through hole 12 can be formed in various other shapes. When the screw 60 is not sufficiently tightened, the indicating portion 41 can be located at a first indicating position; when the torque of the screw 60 reaches a predetermined torque, the indicating portion 41 can be located at a second indicating position; and when the torque of the screw 60 is not up to standard, the indicating portion 41 can be located between the first indicating position and the second indicating position. According to an embodiment of the present application, the first indicating position can be, for example, at a first edge of the indicating through hole 12, and the second indicating position can be, for example, at a second edge of the indicating through hole 12 opposite to the first edge. However, the first indicating position and the second indicating position are not limited to the edges of the indicating through hole 12, and can also be located at other positions within the indicating through hole 12. For example, a scale corresponding to the indicating through hole 12 can be formed on the housing 10, and the first indicating position and the second indicating position can be located between two opposite edges of the indicating through hole 12 and correspond to different scales. In this case, whether the torque of the screw 60 is up to standard can be determined by the scale corresponding to the indicating portion 41.

[0033] According to an embodiment of the present application, the first elastic member 50 can be a leaf spring for biasing the indicating portion 41 of the indicating member 40 toward the first indicating position. However, the present application is not limited thereto, and the first elastic member 50 can be other elastic members as long as it can apply a biasing force to the indicating portion 41.

[0034] After the circuit breaker 1 is used for a period of time, the screw 60 can no longer be sufficiently tightened, i.e., the torque of the screw 60 can decrease. As the torque of the screw 60 decreases, the terminal slot 20 moves downward relative to the housing 10, so that the distance between the terminal portion 31 of the terminal 30 and the lower surface 22 of the terminal slot 20 increases, thereby causing poor contact between the wire and the terminal 30; at the same time, under the biasing action of the first elastic member 50, the indicating portion 41 of the indicating member 40 will move toward the first indicating position, thereby moving away from the second indicating position. Therefore, after the circuit breaker 1 is used for a period of time, if it is observed that the indicating portion 41 moves away from the second indicating position, it can be determined that the torque of the screw 60 decreases and that the operation of tightening the screw 60 needs to be performed again to make the indicating portion 41 reach the second indicating position.

[0035] According to an embodiment of the present application, the circuit breaker 1 can further include a blocking member 70 and a second elastic member 80. The blocking member 70 can be disposed between the upper portion 21 of the wiring slot 20 and the wiring portion 31 of the wiring tab 30, and can include a main body 71 and a protrusion 72 extending from the main body 71. The second elastic member 80 can be disposed between the blocking member 70 and the wiring portion 31 of the wiring tab 30. The indicating member 40 is pivotally mounted to the housing 10 and can include a fitting portion 42. The fitting portion 42 can be in contact with the protrusion 72 of the blocking member 70. As the screw 60 is tightened, the blocking member 70 moves downward to compress the second elastic member 80, while pushing the fitting portion 42 of the indicating member 40 through the protrusion 72 to pivot the indicating member 40, thereby moving the indicating portion 41 of the indicating member 40 within the indicating through hole 12.

[0036] The indicating member 40 can be pivoted about a pivot shaft fixed to the inner wall of the housing 10. Through the contact fitting between the indicating member 40 and the blocking member 70, the indicating member 40 can be moved in the indicating through hole 12 as the screw 60 is tightened, thereby indicating the torque of the screw 60.

[0037] According to an embodiment of the present application, the blocking member 70 can be formed in a plate shape. For example, the blocking member 70 can be formed in a metal sheet to reduce the size of the circuit breaker while providing structural strength. However, the present application is not limited thereto, and the blocking member 70 can include various other shapes and materials.

[0038] According to an embodiment of the present application, the second elastic member 80 can be a disc spring. According to the adopted screw model, the size of the circuit breaker, and other parameters, a suitable disc spring can be selected, which not only can withstand the positive pressure applied by the screw, but also can provide sufficient deformation to make the movement of the indicating portion 41 in the indicating through hole 12 accurately reflect the torque of the screw. For example, the second elastic member 80 can include two groups of disc springs of the same number and opposite to each other, and each group of disc springs includes one or more disc springs. The disc springs opposite to each other can increase the deformation without changing the pressure that can be withstood, so as to make the indication more accurate.

[0039] According to an embodiment of the present application, the indicating member 40 can include an indicating arm and a fitting arm extending away from the pivot axis in different directions. The indicating portion 41 can be disposed at the free end of the indicating arm, i.e., the end of the indicating arm away from the pivot axis. The fitting portion 42 can be included in the fitting arm. It should be understood that this specific form of the indicating member 40 is only an example, and the indicating member 40 can also include other forms.

[0040] According to an embodiment of the present application, the protrusion 72 of the blocking member 70 can extend from the main body 71 in a third direction perpendicular to the first direction and the second direction, and the indicating member 40 can pivot about the third direction. The extension direction of the protrusion 72 of the blocking member 70 is not limited thereto, and the protrusion 72 can also extend from the main body 71 in other directions to contact and cooperate with the cooperating portion 42 of the indicating member 40.

[0041] According to an embodiment of the present application, the circuit breaker 1 can further include a printed circuit board (not shown), a first conductive element 91 (see Figure 5A ) and a second conductive element 92 (see Figure 5A ). The printed circuit board is fixed inside the housing 10, and the first conductive element 91 is mounted on the printed circuit board. The second conductive element 92 is separate from the first conductive element 91 and is electrically connected to the printed circuit board by an additional wire (not shown). The indicating member 40 can further include a connecting portion 43, and the second conductive element 92 is fixed to the connecting portion 43. When the torque of the screw 60 reaches the predetermined torque, the connecting portion 43 of the indicating member 40 moves to a position where the second conductive element 92 contacts the first conductive element 91 (as shown in Figure 6A ), thereby generating an indication signal which is output to the outside of the circuit breaker 1 through a circuit in the printed circuit board.

[0042] Therefore, in addition to being able to determine on site whether the torque of the screw 60 meets the standard through the position of the indicating portion 42 in the indicating through hole 12, the torque of the screw 60 can also be remotely monitored through the indication signal generated by the contact of the first conductive element 91 and the second conductive element 92. Therefore, in the process of daily use, in addition to being able to be monitored on site, the torque of the screw can also be monitored remotely in real time, so as to timely warn when the torque of the screw is less than the preset value, thereby avoiding accidents.

[0043] Figure 4 is a partial perspective view showing a circuit breaker according to an embodiment of the present application.

[0044] Referring to Figure 4 , according to an embodiment of the present application, the housing 10 of the circuit breaker can further include an internal protrusion 13. The internal protrusion 13 can protrude from the inner wall of the housing 10 towards the internal space of the housing 10. When the screw 60 is not screwed in, the upper surface of the blocking member 70 contacts the lower surface of the internal protrusion 13, and the second elastic member 80 is in an uncompressed state. By forming the internal protrusion 13 on the inner wall of the housing 10, and causing the upper surface of the blocking member 70 to abut against the lower surface of the internal protrusion 13 when the second elastic member 80 is uncompressed, the initial position of the blocking member 70 can be calibrated, so that the movement of the indicating portion 41 can more accurately reflect the torque of the screw 60.

[0045] Further, according to an embodiment of the present application, the circuit breaker 1 can further include one or more spacers 65 disposed between the blocking member 70 and the second elastic member 80. Since there are tolerances in the manufacturing of components, especially when the second elastic member 80 includes multiple stacked elastic members (e.g., multiple disc springs), the dimensional tolerance of the second elastic member 80 is further amplified, and thus the initial position of the blocking member 70 can vary with the dimensional tolerance of the second elastic member 80. In this case, by disposing the spacers 65 between the blocking member 70 and the second elastic member 80 and adjusting the number of the spacers 65, the initial position of the blocking member 70 can be ensured to meet the design requirements. The weight of the spacers 65 is negligible compared to the normal pressure applied by the screw, and thus the spacers 65 do not affect the compression of the second elastic member 80. For example, the spacers 65 can be formed as metal foils.

[0046] Figure 5A and Figure 5B is a partial perspective view showing the circuit breaker according to an embodiment of the present application in a first state. Figure 6A and Figure 6B is a partial perspective view showing the circuit breaker according to an embodiment of the present application in a second state. The process of indicating the screw torque is described in detail below. Figures 5A to 6B

[0047] In Figure 5A and Figure 5B the first state shown, the screw 60 has not yet been started to be tightened, and at this time, the indicating portion 41 of the indicating member 40 is in a first indicating position in the indicating through-hole 12 under the biasing action of the first elastic member 50. Further, the first conductive element 91 mounted on a printed circuit board (not shown) and the second conductive element 92 fixed to the connecting portion 43 of the indicating member 41 are separated from each other, and thus no indication signal is generated.

[0048] As the screw 60 is gradually tightened, the terminal slot 20 can move upward relative to the housing 10, so that the distance between the terminal portion 31 of the terminal 30 and the lower portion surface 22 of the terminal slot 20 is reduced, thereby being able to gradually clamp the wire extending into the terminal slot 20 through the wire through-hole 11. The terminal slot 20 can include a through-hole (see Figure 2 ) for the protrusion 72 of the blocking member 70 to pass through, and the size of the through-hole is greater than the size of the protrusion 72 to allow the blocking member 70 to be movable relative to the terminal slot 20 in the second direction. Thus, at the time when the terminal slot 20 starts to move upward, the through-hole of the terminal slot 20 can keep the blocking member 70 stationary.

[0049] ​After the wire is clamped by the wiring portion 31 of the terminal piece 30 and the lower face 22 of the wiring groove 20, as the screw 60 is further tightened, the wiring groove 20 continues to move upward relative to the housing 10, and the second elastic member 80 begins to be positively pressed by the screw and thus elastically deforms, so that the blocking piece 70 moves downward accordingly. In this case, the protrusion 72 of the blocking piece 70 pushes the cooperating portion 42 of the indicating piece 40 by contact cooperation with the cooperating portion 42, so as to pivot the indicating piece 40 about the pivot axis. As the indicating piece 40 is pivoted, the indicating portion 41 can move in the indicating through hole 12 from the first indicating position toward the second indicating position.

[0050] In Figure 6A and Figure 6B the second state shown, the torque of the screw 60 reaches the predetermined torque, at which time the indicating portion 41 of the indicating piece 40 reaches the second indicating position in the indicating through hole 12. In addition, the first conductive element 91 and the second conductive element 92 contact each other, thereby generating an indicating signal for remote monitoring.

[0051] The structure of the circuit breaker according to the present application not only can give clear torque indication on site when wiring, but also can monitor the torque of the screw in real time on site and remotely during daily use, especially remote monitoring, which can timely give early warning when the torque of the screw is less than the preset value, so as to avoid accidents.

[0052] Although the present application has been described in the specification and illustrated in the drawings on the basis of various embodiments, it is understood by those skilled in the art that the above embodiments are only preferred implementation manners, and some technical features in the embodiments can not be essential to solve the specific technical problems, so that these technical features can be omitted without affecting the solution of the technical problems or the formation of the technical scheme; moreover, the features, elements and / or functions of one embodiment can be appropriately combined, combined or matched with those of another one or more embodiments, unless the combination, combination or matching is obviously not implementable.

Claims

1. A circuit breaker characterized by, The circuit breaker includes: a housing including a wire through-hole through which a wire is inserted into the housing in a first direction; a wire slot provided in the housing and formed in a tubular shape with both ends open in the first direction, the open ends of the tubular shape communicating with the wire through-hole, the wire slot including an upper face and a lower face opposite to each other in a second direction perpendicular to the first direction, the upper face including a threaded hole into which a screw is screwed; a terminal fixed in the housing and including a terminal portion extending in the first direction and disposed between the upper face and the lower face of the wire slot; an indicator including an indicator portion visible from the outside through an indicator through-hole of the housing and movable in the indicator through-hole; and a first elastic member biasing the indicator portion of the indicator toward a first indicator position, wherein as the screw is tightened, the wire slot moves upward relative to the housing so that a distance between the terminal portion of the terminal and the lower face of the wire slot decreases, thereby enabling the wire to be compressed, a position of the indicator portion of the indicator in the indicator through-hole changes according to the movement of the wire slot, the indicator portion being located at the first indicator position when the screw is not screwed, the indicator portion being located at a second indicator position when a torque of the screw reaches a predetermined torque.

2. The circuit breaker of claim 1, wherein, The circuit breaker further includes: a stopper provided between the upper face of the wire slot and the terminal portion of the terminal and including a main body and a protrusion extending from the main body; and a second elastic member provided between the stopper and the terminal portion, wherein the indicator is pivotably mounted to the housing and includes a fitting portion in contact with the protrusion of the stopper, as the screw is tightened, the stopper moves downward to compress the second elastic member while pushing the fitting portion of the indicator through the protrusion to pivot the indicator, thereby moving the indicator portion of the indicator in the indicator through-hole.

3. The circuit breaker of claim 2, wherein, The housing further includes an internal protrusion protruding from an inner wall of the housing toward an internal space of the housing, when the screw is not screwed, an upper surface of the stopper is in contact with a lower surface of the internal protrusion, and the second elastic member is in an uncompressed state.

4. The circuit breaker of claim 3, wherein, The circuit breaker further includes one or more spacers provided between the stopper and the second elastic member.

5. The circuit breaker of claim 2, wherein, The indicator includes an indicator arm and a fitting arm extending away from a pivot axis in different directions, the indicator portion is provided at a free end of the indicator arm, and the fitting portion is included in the fitting arm.

6. The circuit breaker of claim 2, wherein, The wire slot includes a through-hole through which the protrusion of the stopper passes, the through-hole being sized larger than the protrusion to enable the stopper to move relative to the wire slot in the second direction.

7. The circuit breaker of claim 2, wherein, The protrusion of the stopper extends from the main body in a third direction perpendicular to the first direction and the second direction, and the indicator pivots about the third direction.

8. The circuit breaker of any one of claims 2 to 7, wherein, The second elastic member is a disc spring.

9. The circuit breaker of claim 8, wherein, The disc spring includes two groups of disc springs identical to and opposite to each other, each group of disc springs including one or more disc springs.

10. The circuit breaker of claim 1, wherein, The circuit breaker further includes: a printed circuit board fixed inside the housing; a first conductive element mounted on the printed circuit board; and a second conductive element separated from the first conductive element and electrically connected to the printed circuit board through an additional conductive wire, wherein the indicator further includes a connecting portion to which the second conductive element is fixed, when the torque of the screw reaches a predetermined torque, the connecting portion of the indicator moves to a position where the second conductive element comes into contact with the first conductive element, thereby generating an indication signal, which is output to the outside of the circuit breaker through a circuit in the printed circuit board.

11. The circuit breaker of claim 1, wherein, The indication through-hole is provided on a surface of the housing on which the screw is mounted.

12. The circuit breaker of claim 1, wherein, when the screw is not screwed in, a first indication position of the indication portion of the indicator is at a first edge of the indication through-hole, when the torque of the screw reaches the predetermined torque, a second indication position of the indication portion is at a second edge of the indication through-hole opposite to the first edge.

13. The circuit breaker of claim 1, wherein, The first elastic member is a leaf spring.

Images