A handle lockable miniature circuit breaker

Abstract

The utility model provides a handle can lock's small -size circuit breaker belongs to circuit breaker technical field, it solved the technical problem of circuit breaker accidental power on. A handle can lock's small -size circuit breaker, including first casing, first casing one side is fixed with second casing, first casing and second casing top middle part rotatory installation has handle body, first casing and second casing top one side all are fixed with support plate, and two support plates are located handle body's both ends respectively, two support plates side wall all are set up with round hole, two round hole side wall set up with same connecting shaft, one end of connecting shaft is fixed with first anti -drop cap. In the utility model, through the clamping mechanism cooperation connecting shaft can handle body is locked and is handled, avoids the user in the maintenance or the repair electrical equipment because of the misoperation and leads to the circuit breaker accidental reset, thereby makes the circuit re -power on condition to happen, prevents the personnel casualties.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, and relates to a miniature circuit breaker, particularly a miniature circuit breaker with a lockable handle. Background Technology

[0002] A circuit breaker is a device used to automatically cut off current in a circuit. It is mainly used to protect circuits and equipment from faults such as overload and short circuit. It can quickly disconnect the circuit when a fault occurs, preventing equipment damage and dangers such as fire. As modern society becomes increasingly dependent on electricity, electrical safety issues are becoming more and more prominent. Electrical faults, such as short circuits and overloads, may lead to equipment damage, fire, or even personal injury. Therefore, effective protection devices are needed in electrical systems to ensure safe operation.

[0003] While traditional circuit breakers can provide overload and short-circuit protection, their handles typically lack a locking function. This means that the handle cannot be effectively locked when the circuit breaker is open, resulting in a lack of necessary safety protection. In some cases, users may accidentally reset the circuit breaker due to misoperation when maintaining or repairing electrical equipment, causing the circuit to be powered on again and creating a safety hazard. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a miniature circuit breaker with a lockable handle. The technical problem this utility model aims to solve is: how to lock the handle of the circuit breaker to provide necessary safety assurance.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A miniature circuit breaker with a lockable handle includes a first housing, a second housing fixed to one side of the first housing, a handle body rotatably mounted at the top middle of the first and second housings, a support plate fixed to one side of the top of both the first and second housings, and the two support plates are respectively located at both ends of the handle body, a circular hole is provided on the side wall of each of the two support plates, the same connecting shaft is provided on the side wall of the two circular holes, a first anti-detachment cap is fixed to one end of the connecting shaft, a limiting mechanism for limiting the connecting shaft is provided on the side wall of the connecting shaft, and a locking mechanism for locking the connecting shaft is provided on the outer side wall of the first housing.

[0007] The above structure, through the locking mechanism and connecting shaft, can lock the handle body, preventing accidental reset of the circuit breaker due to user misoperation during maintenance or repair of electrical equipment, thus preventing personal injury. The limit mechanism design allows for quick locking of the connecting shaft, which quickly locks the handle body, saving time and improving work efficiency.

[0008] As a further embodiment of this utility model, the limiting mechanism includes two protrusions, which are symmetrically fixed on the side wall of the connecting shaft. Two grooves are symmetrically opened on the side wall of each of the two circular holes. The four grooves are arranged in pairs, and the two sets of grooves are respectively adapted to the two protrusions.

[0009] With the above structure, through the action of two grooves and two protrusions, when the first anti-slip cap and the first housing are tightly fitted, the through hole is directly above the column. This allows for quick engagement between the through hole and the column without the need to adjust the angle of the through hole, saving time and improving work efficiency.

[0010] As a further embodiment of this utility model, the snap-fit ​​mechanism includes a connecting plate, which is fixed to the outer wall of the first housing. A sleeve is provided through the top of the connecting plate. A circular slider is slidably connected to the inner wall of the sleeve. A column is fixed to the top of the circular slider, and one end of the column passes through the top of the sleeve. A through hole is opened on the side wall of the other end of the connecting shaft, and the through hole is adapted to the column. A circular plate is slidably connected to the inner wall of the sleeve, and the circular plate is located at the bottom of the circular slider. A pull rod is fixed to the bottom of the circular plate, and one end of the pull rod passes through the bottom of the sleeve. A spring is sleeved on the side wall of the pull rod.

[0011] With the above structure, when locking the handle body is required, first pull the lever, causing the circular plate to move downwards along the inner wall of the sleeve. During the downward movement of the circular plate, the spring gradually compresses. At this time, under its own gravity, the circular slider moves downwards along the inner wall of the sleeve, causing part of the column to retract into the sleeve. When locking, release the lever, and the spring gradually returns to its original state. During the return of the spring to its original state, the circular plate moves upwards along the inner wall of the sleeve, cooperating with the circular slider to drive the column upwards until the top of the column passes through the through hole, completing the locking of the connecting shaft, thus locking the handle body and preventing the circuit breaker from resetting, improving safety.

[0012] As a further embodiment of this utility model, a connecting rod is fixed to the outer wall of the second housing, a collar is sleeved on the side wall of the connecting rod, an elastic rope is fixed to the outer wall of the collar, and one end of the elastic rope is fixed to the first anti-detachment cap, and a second anti-detachment cap is fixed to one end of the connecting rod.

[0013] The above structure can effectively prevent the connection shaft from being lost.

[0014] Compared with the prior art, the miniature circuit breaker with a lockable handle of this invention has the following advantages:

[0015] 1. In this utility model, during use, the device can lock the handle body through the snap-fit ​​mechanism and the connecting shaft, so as to prevent the circuit breaker from being accidentally reset due to user misoperation during maintenance or repair of electrical equipment, thereby restoring power to the circuit and preventing personal injury.

[0016] 2. In this utility model, the design of the limiting mechanism allows for quick engagement of the connecting shaft, which in turn allows for rapid locking of the handle body, saving time and improving work efficiency.

[0017] 3. In this utility model, when there is no need to lock the handle body, the design of the second anti-detachment cap, elastic rope, connecting rod and collar can suspend the connecting shaft on the circuit breaker, which can effectively prevent the connecting shaft from being lost. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a small circuit breaker with a lockable handle according to the present invention;

[0019] Figure 2 This is a schematic diagram of the handle body and connecting shaft of a miniature circuit breaker with a lockable handle according to this utility model;

[0020] Figure 3 This is a schematic diagram of the first housing, the second housing, and the support plate of a miniature circuit breaker with a lockable handle according to this utility model;

[0021] Figure 4 yes Figure 3 Enlarged view at point A;

[0022] Figure 5 This is a schematic diagram of the first anti-detachment cap, elastic rope, connecting rod, and collar of a miniature circuit breaker with a lockable handle according to this utility model;

[0023] Figure 6 This is a cross-sectional schematic diagram of the connecting plate and sleeve of a miniature circuit breaker with a lockable handle according to this utility model.

[0024] In the diagram, 1. First housing; 2. Second housing; 3. Handle body; 4. Support plate; 5. Connecting plate; 6. Connecting shaft; 7. Second anti-slip cap; 8. Round hole; 9. Groove; 10. Protrusion; 11. Through hole; 12. First anti-slip cap; 13. Elastic rope; 14. Connecting rod; 15. Collar; 16. Sleeve; 17. Circular slider; 18. Circular plate; 19. Column; 20. Pull rod; 21. Spring. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figure 1 - Figure 6 As shown, a miniature circuit breaker with a lockable handle includes a first housing 1, a second housing 2 fixed to one side of the first housing 1, a handle body 3 rotatably mounted at the top middle of the first housing 1 and the second housing 2, support plates 4 fixed to one side of the top of both the first housing 1 and the second housing 2, and the two support plates 4 are respectively located at both ends of the handle body 3, and each of the two support plates 4 has a circular hole 8 on its side wall, and the same connecting shaft 6 is provided on the side wall of the two circular holes 8, a first anti-detachment cap 12 is fixed to one end of the connecting shaft 6, a limiting mechanism for limiting the connecting shaft 6 is provided on the side wall of the connecting shaft 6, and a locking mechanism for locking the connecting shaft 6 is provided on the outer side wall of the first housing 1.

[0027] In this embodiment, the limiting mechanism includes two protrusions 10, which are symmetrically fixed on the side wall of the connecting shaft 6. Two grooves 9 are symmetrically opened on the side wall of the two round holes 8. The four grooves 9 are in pairs, and the two sets of grooves 9 are respectively adapted to the two protrusions 10.

[0028] In this embodiment, the snap-fit ​​mechanism includes a connecting plate 5, which is fixed to the outer wall of the first housing 1. A sleeve 16 is provided through the top of the connecting plate 5. A circular slider 17 is slidably connected to the inner wall of the sleeve 16. A column 19 is fixed to the top of the circular slider 17, and one end of the column 19 passes through the top of the sleeve 16. A through hole 11 is provided on the side wall of the other end of the connecting shaft 6, and the through hole 11 is adapted to the column 19.

[0029] In this embodiment, a circular plate 18 is slidably connected to the inner wall of the sleeve 16, and the circular plate 18 is located at the bottom of the circular slider 17. A pull rod 20 is fixed at the bottom of the circular plate 18, and one end of the pull rod 20 passes through the bottom of the sleeve 16. A spring 21 is sleeved on the side wall of the pull rod 20.

[0030] In this embodiment, a connecting rod 14 is fixed to the outer wall of the second housing 2, a collar 15 is sleeved on the side wall of the connecting rod 14, an elastic rope 13 is fixed to the outer wall of the collar 15, and one end of the elastic rope 13 is fixed to the first anti-slip cap 12.

[0031] In this embodiment, a second anti-detachment cap 7 is fixed to one end of the connecting rod 14.

[0032] The working principle of this utility model is as follows: During use, when workers need to repair or replace electrical components, the circuit must be disconnected beforehand. When the power is cut off, rotating the handle body 3 activates the circuit breaker's protection mechanism, causing the internal tripping mechanism to automatically disconnect the circuit and ensure safety. To prevent the circuit breaker from resetting during operation, the handle body 3 needs to be locked. First, pull the lever 20 to move the circular plate 18 downwards along the inner wall of the sleeve 16. As the circular plate 18 moves downwards, the spring 21 gradually compresses. At this time, under its own weight, the circular slider 17 moves downwards along the inner wall of the sleeve 16, causing part of the column 19 to retract into the sleeve 16. Then, the connecting... The connecting shaft 6 is inserted into the two round holes 8. Under the action of the two grooves 9 and the two protrusions 10, when the first anti-detachment cap 12 and the first housing 1 are tightly fitted, the through hole 11 is directly above the column 19. This allows for a quick engagement between the through hole 11 and the column 19 without the need to adjust the angle of the through hole 11, saving time and improving work efficiency. During engagement, the pull rod 20 is released, and the spring 21 gradually returns to its original state. As the spring 21 returns to its original state, the circular plate 18 moves upward along the inner wall of the sleeve 16, which, together with the circular slider 17, drives the column 19 upward until the top of the column 19 passes through the through hole 11, completing the engagement of the connecting shaft 6. This locks the handle body 3, preventing the circuit breaker from resetting and improving safety.

[0033] In summary, in this utility model, the handle body 3 can be locked by the connecting shaft 6, which prevents the circuit breaker from being accidentally reset due to user misoperation during maintenance or repair of electrical equipment, thus preventing the circuit from being re-energized and causing personal injury.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A miniature circuit breaker with a handle lockable design, comprising a first housing (1), characterized in that, A second housing (2) is fixed to one side of the first housing (1). A handle body (3) is rotatably installed at the middle of the top of the first housing (1) and the second housing (2). A support plate (4) is fixed to one side of the top of the first housing (1) and the second housing (2). The two support plates (4) are located at the two ends of the handle body (3). The side walls of the two support plates (4) are provided with round holes (8). The side walls of the two round holes (8) are provided with the same connecting shaft (6). One end of the connecting shaft (6) is fixed with a first anti-detachment cap (12). The side wall of the connecting shaft (6) is provided with a limiting mechanism for limiting the connecting shaft (6). The outer side wall of the first housing (1) is provided with a snapping mechanism for snapping the connecting shaft (6).

2. The handle lockable miniature circuit breaker according to claim 1, characterized in that, The limiting mechanism includes two protrusions (10), which are symmetrically fixed on the side wall of the connecting shaft (6). Two grooves (9) are symmetrically opened on the side wall of the two round holes (8). The four grooves (9) are in pairs, and the two sets of grooves (9) are respectively adapted to the two protrusions (10).

3. The handle lockable miniature circuit breaker according to claim 1, characterized in that, The snap-fit ​​mechanism includes a connecting plate (5), which is fixed to the outer wall of the first housing (1). A sleeve (16) is provided through the top of the connecting plate (5). A circular slider (17) is slidably connected to the inner wall of the sleeve (16). A column (19) is fixed to the top of the circular slider (17), and one end of the column (19) is through the top of the sleeve (16). A through hole (11) is provided on the side wall of the other end of the connecting shaft (6), and the through hole (11) and the column (19) are compatible.

4. The handle lockable molded case circuit breaker of claim 3, wherein, A circular plate (18) is slidably connected to the inner wall of the sleeve (16), and the circular plate (18) is located at the bottom of the circular slider (17). A pull rod (20) is fixed at the bottom of the circular plate (18), and one end of the pull rod (20) passes through the bottom of the sleeve (16). A spring (21) is sleeved on the side wall of the pull rod (20).

5. The handle lockable miniature circuit breaker of claim 1, wherein, A connecting rod (14) is fixed to the outer wall of the second housing (2). A collar (15) is sleeved on the side wall of the connecting rod (14). An elastic rope (13) is fixed to the outer wall of the collar (15), and one end of the elastic rope (13) is fixed to the first anti-slip cap (12).

6. The handle lockable miniature circuit breaker according to claim 5, characterized in that, A second anti-slip cap (7) is fixed to one end of the connecting rod (14).

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