Circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a circuit breaker. The circuit breaker comprises a shell, a tripping indicating piece, a lever and a connecting rod, the shell is provided with an observation hole and a mounting groove; an observation hole, a mounting groove and a first limiting groove are formed in the shell; the tripping indicating piece is rotationally connected into the mounting groove, the tripping indicating piece has a first state of being arranged below the observation hole and a second state of being arranged in the observation hole in a staggered mode, and a first limiting part is arranged on the tripping indicating piece; the lever is in transmission connection with the tripping indicating piece, the lever is used for driving the tripping indicating piece to rotate from a first state to a second state when the circuit breaker is closed, and the first limiting part is clamped in the first limiting groove; and the connecting rod is in transmission connection with the tripping indicating piece and is used for driving the tripping indicating piece to rotate from the second state to the first state when the circuit breaker is disconnected due to the line fault, and the first limiting part is separated from the first limiting groove. According to the utility model, a user can be helped to accurately judge the disconnection state of the circuit breaker.

Description

Technical Field

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

[0002] Both small circuit breaker products and residual current operated circuit breaker products have overload protection and short-circuit protection functions. When an overload or short-circuit fault occurs in the power line, the product will trip and disconnect freely, thereby protecting the power line and the electrical appliances in the line.

[0003] The circuit breaker usually has a handle that can control the closing and opening of the circuit breaker, and a mark that clearly indicates the closing state and the opening state is set on the outer surface of the circuit breaker. This mark can be a text mark, a letter mark or a pattern mark.

[0004] In fact, the disconnection state of the circuit breaker is divided into two states: manual disconnection state and fault disconnection state. The so-called manual disconnection state means that the user or operator disconnects the circuit breaker by operating the handle. The fault disconnection means that when the circuit breaker is overloaded or short-circuited, the internal tripping mechanism is triggered to disconnect the circuit breaker. In the above two cases, the operator or user only observes the disconnection state of the circuit breaker, but there is still a technical problem that it is impossible to distinguish whether it is manual disconnection or fault disconnection. Utility Model Content

[0005] The utility model aims to provide a trip indicator and a circuit breaker, which are used to help an operator or a user accurately determine whether the disconnection state of the circuit breaker is manual disconnection or fault disconnection.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Circuit breakers, including:

[0008] A housing, wherein the housing is provided with an observation hole, a mounting groove and a first limiting groove;

[0009] A trip indicator, rotatably connected in the mounting groove, the trip indicator having a first state where it is arranged below the observation hole and a second state where it is arranged offset in the observation hole, and a first limiting portion is provided on the trip indicator;

[0010] a lever, which is in transmission connection with the trip indicator, and is used to drive the trip indicator to rotate from the first state to the second state when the circuit breaker is closed, and the first limiting portion is clamped in the first limiting groove;

[0011] A connecting rod is transmission-connected with the trip indicator, and is used to drive the trip indicator to rotate from the second state to the first state when the circuit breaker is disconnected due to a line fault, and the first limiting portion is disengaged from the first limiting groove.

[0012] As an optional solution of a circuit breaker, the trip indicator is provided with a first boss, the lever is provided with an extension block for abutting against the first boss, and the connecting rod is provided with a driving block for abutting against the first boss.

[0013] As an optional solution for a circuit breaker, a rotating shaft is provided on the trip indicator, and a positioning hole rotatably connected to the rotating shaft is provided in the housing.

[0014] As an optional solution for a circuit breaker, the first limiting portion includes two extension arms spaced apart along the rotation direction, and a clamping block is provided at the end of the two extension arms. The two clamping blocks extend in directions away from each other, and the clamping blocks are used to clamp with the inner wall of the first limiting groove.

[0015] As an optional solution for a circuit breaker, the connection between the clamping block and the extension arm is transitioned through an arc surface.

[0016] As an optional solution of a circuit breaker, the extension arm is elastic.

[0017] As an optional solution for a circuit breaker, second bosses are respectively provided on two opposite inner walls of the first limiting groove, and when the first limiting portion is clamped in the first limiting groove, the two blocking blocks facing away from each other respectively abut against the side surfaces of the second bosses close to the first limiting groove.

[0018] As an optional solution for a circuit breaker, the end of the second boss is provided with a rounded corner.

[0019] As an optional solution for a circuit breaker, the shell above the observation hole is provided with an observation window, and the observation window is made of a transparent or translucent material.

[0020] As an optional solution for a circuit breaker, a receiving groove is recessed on the surface of the shell, the receiving groove is communicated with the observation hole, the observation window is arranged in the receiving groove, and the observation window and the receiving groove are interference fit.

[0021] Beneficial effects:

[0022] In the utility model, the trip indicator has a first state arranged below the observation hole and a second state arranged offset in the observation hole. When the trip indicator is in the first state, the operator can see the trip indicator through the observation hole. When the trip indicator is in the second state, the operator cannot see the trip indicator through the observation hole. Further, when the circuit breaker is closed, the lever pushes the trip indicator to rotate from the first state to the second state. During the whole process, the operator can see the process of the trip indicator "from existence to non-existence" through the observation hole. In addition, when the circuit breaker is closed, The trip indicator is in the second state, and the first limit portion of the trip indicator is pushed to be clamped in the first limit groove to limit the free rotation of the trip indicator; the trip indicator is driven to rotate in the opposite direction by the rotation of the connecting rod, that is, from the second state to the first state, and the operator can see the process of the trip indicator "from nothing to something" through the observation hole during the whole process; since the lever and the connecting rod will not act on the trip indicator when the circuit breaker is manually disconnected, the trip indicator will not be driven. Therefore, when the operator manually disconnects the circuit breaker, the trip indicator does not move, and the operator cannot see the trip indicator through the observation hole. Through the present application, the operator or user can accurately determine whether the disconnection state of the circuit breaker is manual disconnection or fault disconnection by identifying the trip indicator. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a first structural schematic diagram of the interior of a circuit breaker with a partially hidden housing provided by an embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of a circuit breaker with a hidden observation window provided by an embodiment of the utility model;

[0025] Figure 3 It is a second structural schematic diagram of the interior of the circuit breaker with a partially hidden housing provided by an embodiment of the utility model;

[0026] Figure 4 yes Figure 2 A local enlarged view at point A;

[0027] Figure 5 yes Figure 3 A schematic diagram of the structure of the hidden trip indicator;

[0028] Figure 6 It is a front view of the trip indicator provided by the embodiment of the utility model;

[0029] Figure 7 It is an axonometric diagram of a trip indicator provided by an embodiment of the utility model;

[0030] Figure 8 It is a structural schematic diagram of a circuit breaker provided in an embodiment of the utility model.

[0031] In the figure:

[0032] 1. Shell; 11. Observation hole; 12. Mounting slot; 13. First limiting slot; 131. Second boss; 14. Positioning hole; 15. Accommodating slot;

[0033] 2. Trip indicator; 21. First limit portion; 211. Extension arm; 212. Block; 22. First boss; 23. Rotating shaft;

[0034] 3. Lever; 31. Extension block;

[0035] 4. Connecting rod; 41. Driving block;

[0036] 5. Observation window. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] Please refer to the attached Figure 1 -Attached Figure 3 , this embodiment relates to a circuit breaker.

[0042] The circuit breaker comprises a housing 1, a trip indicator 2, a lever 3 and a connecting rod 4; the housing 1 is provided with an observation hole 11, a mounting groove 12 and a first limiting groove 13; the trip indicator 2 is rotatably connected in the mounting groove 12, the trip indicator 2 has a first state arranged below the observation hole 11 and a second state arranged offset in the observation hole 11, and a first limiting portion 21 is provided on the trip indicator 2; the lever 3 is transmission-connected with the trip indicator 2, the lever 3 is used to drive the trip indicator 2 to rotate from the first state to the second state when the circuit breaker is closed, and the first limiting portion 21 is clamped in the first limiting groove 13; the connecting rod 4 is transmission-connected with the trip indicator 2, the connecting rod 4 is used to drive the trip indicator 2 to rotate from the second state to the first state when the circuit breaker is disconnected due to a line fault, and the first limiting portion 21 is disengaged from the first limiting groove 13.

[0043] In the present embodiment, the housing 1 is provided with a mounting groove 12 on the top wall in a direction parallel to the top wall, and the trip indicator 2 is inserted into the mounting groove 12 as a whole. At the same time, the trip indicator 2 has a first state provided below the observation hole 11 and a second state provided offset in the observation hole 11. When the trip indicator 2 is in the first state, the operator or user can see the trip indicator 2 through the observation hole 11. When the trip indicator 2 is in the second state, the operator or user cannot see the trip indicator 2 through the observation hole 11. Further, when the circuit breaker is closed, the lever 3 pushes the trip indicator 2 to rotate from the first state to the second state. During the whole process, the operator can see the process of the trip indicator 2 "from existence to non-existence" through the observation hole 11. In addition, when the circuit breaker is closed, in order to avoid the trip indicator 2 It rotates freely in the mounting groove 12. When the trip indicator 2 is in the second state, the first limiting portion 21 of the trip indicator 2 is pushed and clamped in the first limiting groove 13 to limit the free rotation of the trip indicator 2. The connecting rod 4 is a component of the circuit breaker tripping mechanism in the circuit breaker. It will only rotate when the circuit breaker tripping mechanism is triggered to disconnect due to a line fault. The rotation of the connecting rod 4 drives the trip indicator 2 to rotate in the opposite direction, that is, from the second state to the first state. During the whole process, the operator can see the process of the trip indicator 2 "from nothing to something" through the observation hole 11. Since the lever 3 and the connecting rod 4 will not act on the trip indicator 2 when the circuit breaker is manually disconnected, when the operator manually disconnects the circuit breaker, the trip indicator 2 remains motionless, and the operator cannot see the trip indicator 2 through the observation hole 11.

[0044] In summary, through the present application, the operator or user can accurately determine whether the disconnection state of the circuit breaker is manual disconnection or fault disconnection by identifying the trip indicator 2.

[0045] In this embodiment, during the normal manual closing and opening process of the circuit breaker, the connecting rod 4 of the circuit breaker will not rotate relative to the lever 3. Only when the line is overloaded or short-circuited, the circuit breaker is tripped, the connecting rod 4 and the lock as part of the tripping mechanism are unlocked, and the connecting rod 4 rotates relative to the lever 3. By utilizing the characteristic that the connecting rod 4 rotates relative to the lever 3, the connecting rod 4 can drive the tripping indicator 2 to rotate from the second state to the first state. The user and the operator can easily know whether the circuit breaker is manually disconnected or abnormally disconnected through the switching indication of the two states. When the user and the operator observe the above-mentioned state switching, the warning operator can judge that the line fault needs to be eliminated in time. When the operator closes the product again after eliminating the fault, the movement of the lever 3 of the product will drive the tripping indicator 2 to move to the initial position to achieve the reset of the tripping indicator 2. Through the conversion of this position state of the tripping indicator 2, the two disconnection states of the circuit breaker can be distinguished.

[0046] Please refer to the attached Figure 4Optionally, a first boss 22 is provided on the trip indicator 2 , an extension block 31 for abutting against the first boss 22 is provided on the lever 3 , and a driving block 41 for abutting against the first boss 22 is provided on the connecting rod 4 .

[0047] In this embodiment, the main body of the trip indicator 2 is a plate-shaped member, and a first boss 22 is protruding on one side wall of the trip indicator 2. The first boss 22 is in the shape of a rectangular parallelepiped, and one side surface of the first boss 22 is used to abut against the lever 3. The lever 3 is a part of the internal operating mechanism of the circuit breaker and can rotate when the circuit breaker is closed. In this embodiment, the main body of the lever 3 can adopt the existing circuit breaker lever structure, and an extension block 31 is integrally formed on the circuit breaker lever structure to trigger one side surface of the first boss 22, thereby achieving the movement effect of the lever 3 driving the trip indicator 2 to rotate. In addition, the driving block 41 on the connecting rod 4 can push the trip indicator 2 to rotate from the second state to the first state.

[0048] Please refer to the attached Figure 5 -Attached Figure 7 Optionally, a rotating shaft 23 is provided on the trip indicator 2, and a positioning hole 14 rotatably connected to the rotating shaft 23 is provided in the housing 1.

[0049] In this embodiment, the axis line of the positioning hole 14 is perpendicular to the plane where the top wall of the shell 1 is located. Adaptively, the rotating shaft 23 is inserted into the positioning hole 14, the axis center of the rotating shaft 23 is the rotation center of the trip indicator 2, and the rotating shaft 23 is integrally formed in the main body of the trip indicator 2.

[0050] In this embodiment, the main body of the trip indicator 2 can abut against the inner wall of one side of the mounting groove 12 relative to one side of the first limiting portion 21, thereby limiting the maximum distance of the trip indicator 2 moving in the direction away from the first limiting groove 13. The maximum distance of the trip indicator 2 moving in the direction of the first limiting groove 13 can be achieved through the clamping position of the first limiting groove 13 and the first limiting portion 21.

[0051] Please continue to refer to the attached Figure 6 and attached Figure 7 Optionally, the first limiting portion 21 includes two extension arms 211 spaced apart along the rotation direction, and a clamping block 212 is provided at the end of the two extension arms 211. The two clamping blocks 212 extend in directions away from each other, and the clamping blocks 212 are used to clamp with the inner wall of the first limiting groove 13.

[0052] In this embodiment, when the circuit breaker is closed, the lever 3 drives the trip indicator 2 to rotate from the first state to the second state, and the two extension arms 211 are inserted into the first limiting groove 13 and are engaged with the inner wall of the first limiting groove 13 to fix the trip indicator 2 relative to the housing 1. The two clamping blocks 212 extend away from each other and are respectively connected to the two extension arms 211 in an L-shape, thereby effectively preventing the first limiting portion 21 from slipping out of the first limiting groove 13.

[0053] Furthermore, the extension arm 211 is elastic.

[0054] In this embodiment, during the process of inserting the extension arm 211 into the first limit slot 13, the elasticity of the extension arm 211 can ensure that the extension arm 211 is stably clamped in the first limit slot 13, and can further ensure a certain number of actions of the trip indicator 2 through frequent elastic deformation and elastic recovery, thereby ensuring the service life of the trip indicator 2 and the circuit breaker. In addition, the two extension arms 211 are arranged at intervals, and during the process of inserting the extension arm 211 into the first limit slot 13, the gap between the two extension arms 211 provides a clearance for them to approach each other, so that the clamping force of the extension arm 211 relative to the inner wall of the first limit slot 13 is not large, thereby ensuring that when the circuit breaker is disconnected due to a line fault, the driving block 41 on the connecting rod 4 can push the trip indicator 2 to rotate from the second state to the first state, and the force required during the rotation process will not be too large, and of course the reaction force received by the driving block 41 and the connecting rod 4 will not be too large, thereby effectively reducing the tripping effect of the introduction of the trip indicator 2 on the tripping mechanism of the circuit breaker, thereby ensuring the reliability of the circuit breaker.

[0055] Optionally, the connection between the block 212 and the extension arm 211 is transitioned through an arc surface.

[0056] The connection between the block 212 and the extension arm 211 will actually present a certain angle. The block 212 will be frequently subjected to force during the rotation of the trip indicator 2. The area between the block 212 and the extension arm 211 is in a stress concentration area. The connection between the block 212 and the extension arm 211 is connected by an arc surface transition to effectively avoid stress concentration between the block 212 and the extension arm 211.

[0057] Optionally, second bosses 131 are respectively provided on two opposite inner walls of the first limiting groove 13 , and when the first limiting portion 21 is clamped in the first limiting groove 13 , two mutually diverging clamping blocks 212 respectively abut against the side surfaces of the second bosses 131 close to the first limiting groove 13 .

[0058] In this embodiment, the second boss 131 can be directly provided at the opening of the shell 1 near the first limiting groove 13 by an integral molding manner, and the structures of the two second bosses 131 can be the same, or there can be certain shape differences, as long as it can be ensured that the two blocks 212 at the end of the extension arm 211 are stably abutted against the second boss 131 on the side near the first limiting groove 13.

[0059] Furthermore, the end of the second boss 131 is provided with a rounded corner.

[0060] In this embodiment, when the trip indicator 2 rotates to insert the first limiting portion 21 into the first limiting groove 13, the two clamping blocks 212 will slide at the ends of the second boss 131 respectively until they are fully engaged in the first limiting groove 13. By replacing the straight edge of the end of the second boss 131 with a rounded corner, the clamping block 212 can be smoothly slid from one end of the second boss 131 to the other end to complete the engagement, thereby ensuring a smooth engagement process.

[0061] Please refer to the attached Figure 8 Optionally, the shell 1 above the observation hole 11 is provided with an observation window 5, and the observation window 5 is made of transparent or translucent material.

[0062] In this embodiment, the observation window 5 is covered on the observation hole 11, and the user can easily learn the state of the trip indicator 2 through the observation window 5. In addition, in order to help the user quickly distinguish the trip indicator 2 below the observation window 5, the trip indicator 2 can be presented in a relatively eye-catching color. For example, the trip indicator 2 is red as a whole. Specifically, the outer wall of the trip indicator 2 can be coated with paint, or a colored sticker can be attached, or the trip indicator 2 can be directly presented in a certain specific color after being formed.

[0063] Please continue to refer to the attached Figure 2 and attached Figure 8 Optionally, a receiving groove 15 is concavely provided on the surface of the housing 1, the receiving groove 15 is communicated with the observation hole 11, the observation window 5 is arranged in the receiving groove 15, and the observation window 5 and the receiving groove 15 are interference-fitted. In this embodiment, the receiving groove 15 is processed into a long strip shape, and the observation window 5 is also adaptively long strip shape, the observation window 5 and the receiving groove 15 are wedge-shaped connected and the two are interference-fitted, which effectively ensures the overall sealing of the circuit breaker.

[0064] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A circuit breaker, characterized in that include: A housing (1), wherein the housing (1) is provided with an observation hole (11), a mounting groove (12) and a first limiting groove (13); A trip indicator (2) is rotatably connected in the mounting groove (12), the trip indicator (2) having a first state in which it is arranged below the observation hole (11) and a second state in which it is arranged offset from the observation hole (11), and a first limiting portion (21) is provided on the trip indicator (2); A lever (3) is transmission-connected to the trip indicator (2), the lever (3) being used to drive the trip indicator (2) to rotate from the first state to the second state when the circuit breaker is closed, and the first limiting portion (21) is clamped in the first limiting groove (13); A connecting rod (4) is drivingly connected to the trip indicator (2), and the connecting rod (4) is used to drive the trip indicator (2) to rotate from the second state to the first state when the circuit breaker is disconnected due to a line fault, and the first limiting portion (21) is disengaged from the first limiting groove (13).

2. The circuit breaker according to claim 1, characterized in that: The trip indicator (2) is provided with a first boss (22), the lever (3) is provided with an extension block (31) for abutting against the first boss (22), and the connecting rod (4) is provided with a driving block (41) for abutting against the first boss (22).

3. The circuit breaker according to claim 1, characterized in that: The trip indicator (2) is provided with a rotating shaft (23), and the housing (1) is provided with a positioning hole (14) rotatably connected to the rotating shaft (23).

4. The circuit breaker according to claim 1, characterized in that: The first limiting portion (21) comprises two extension arms (211) arranged at intervals along the rotation direction, and a clamping block (212) is arranged at the end of each of the two extension arms (211). The two clamping blocks (212) extend in directions away from each other, and the clamping blocks (212) are used to clamp with the inner wall of the first limiting groove (13).

5. The circuit breaker according to claim 4, characterized in that: The connection between the clamping block (212) and the extension arm (211) is transitioned through an arc surface.

6. The circuit breaker according to claim 4, characterized in that: The extension arm (211) is elastic.

7. The circuit breaker according to claim 4, characterized in that: Second bosses (131) are respectively provided on two opposite inner walls of the first limiting groove (13); when the first limiting portion (21) is clamped in the first limiting groove (13), the two clamping blocks (212) which are separated from each other respectively abut against the side surfaces of the second bosses (131) close to the first limiting groove (13).

8. The circuit breaker according to claim 7, characterized in that: The end of the second boss (131) is provided with a rounded corner.

9. The circuit breaker according to claim 1, characterized in that: The housing (1) above the observation hole (11) is provided with an observation window (5), and the observation window (5) is made of a transparent or translucent material.

10. The circuit breaker according to claim 9, characterized in that A receiving groove (15) is concavely provided on the surface of the housing (1), the receiving groove (15) is communicated with the observation hole (11), the observation window (5) is arranged in the receiving groove (15), and the observation window (5) and the receiving groove (15) are interference fit.

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