A miniature circuit breaker

Abstract

The utility model relates to the field of circuit breaker especially relates to a miniature circuit breaker, including L type board, L type board is opened with rectangular mouth, one side of L type board is provided with circuit breaker main part, be provided with protection shell on L type board, be opened with rectangular groove on L type board, the symmetrical distribution of outer thread pipe is provided in rectangular groove, one side of L type board is provided with the protection mechanism that moves through outer thread pipe control protection shell, the top fixed connection of L type board has connecting plate, the below of connecting plate is provided with the clamping block, be provided with the fixed mechanism that installs circuit breaker main part through clamping block on L type board. The utility model during usage, can through the rotation of outer thread pipe, let the moving block of both sides be close to each other, and the protection shell is driven by moving block and is close to each other, until together, the protection of inside circuit breaker main part, avoid the handle damage of circuit breaker by external force impact possibly, shell crack, at the same time, prevent the normal use of circuit breaker from the influence of accidental touch.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a miniature circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting normal and abnormal circuit currents. Its core functions include overload protection, short-circuit protection, and manual operation. High-voltage circuit breakers need to handle large current arcs, while low-voltage circuit breakers, such as miniature circuit breakers, are widely used in terminal power distribution.

[0003] Although miniature circuit breakers can provide a certain degree of protection through their own casing, in environments with frequent personnel activity or the risk of object collisions, circuit breakers are susceptible to external impacts, which may damage the handle, crack the casing, or cause accidental activation that affects the normal use of the circuit breaker. Therefore, a miniature circuit breaker is proposed. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of circuit breakers that are susceptible to damage to the handle, cracking of the housing, or accidental activation that may affect the normal use of the circuit breaker, and to propose a miniature circuit breaker.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A miniature circuit breaker includes an L-shaped plate with a rectangular opening. A circuit breaker body is located on one side of the L-shaped plate, and a protective shell is also provided on the L-shaped plate. A rectangular groove is formed on the L-shaped plate, and symmetrically distributed externally threaded tubes are arranged within the groove. A protective mechanism for controlling the movement of the protective shell via the externally threaded tubes is provided on one side of the L-shaped plate. A connecting plate is fixedly connected to the top of the L-shaped plate, and a locking block is located below the connecting plate. A fixing mechanism for installing the circuit breaker body via the locking block is also provided on the L-shaped plate.

[0007] Preferably, the protective mechanism includes a rotating rod rotatably connected to the L-shaped plate, a knob fixedly connected to one end of the rotating rod, a planar gear fixedly connected to one end of the rotating rod, a circular rod fixedly connected inside the rectangular groove, the circular rod being located in the inner diameter of the externally threaded tube, an end face gear fixedly connected to one end of the externally threaded tube, the end face gear meshing with the planar gear, a movable block fixedly connected to the bottom of the protective shell, and the externally threaded tube being threadedly connected to the movable block.

[0008] Preferably, the circular rod and the externally threaded tube have circular holes, the rotating rod is located inside the circular holes, the moving block is slidably connected to the rectangular groove, and one side of the protective shell is in contact with one side of the L-shaped plate.

[0009] Preferably, the fixing mechanism includes a connecting rod slidably connected to a connecting plate, a pull plate fixedly connected to one end of the connecting rod, a rectangular plate fixedly connected to one end of the connecting rod, a locking block fixedly connected to the bottom of the rectangular plate, a spring fixedly connected to the top of the rectangular plate, one end of the spring fixedly connected to the connecting plate, a first mounting plate fixedly connected to one side of the circuit breaker body, a locking groove provided on the top of the first mounting plate and the L-shaped plate, and the locking block located in the locking groove.

[0010] Preferably, the top of the rectangular plate abuts against the top of the L-shaped plate, and a mounting groove is provided on one side of the L-shaped plate, with the first mounting plate located in the mounting groove.

[0011] Preferably, a second mounting plate is fixedly connected to both sides of the L-shaped plate, the second mounting plate has mounting holes, and an observation window is provided on one side of the protective shell.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] When in use, the rotating of the external threaded tube allows the two moving blocks on both sides to move closer together. The moving blocks then move the protective shell closer together until they merge together, protecting the internal circuit breaker body and preventing damage to the handle or cracking of the shell caused by external impact. At the same time, it prevents accidental activation that could affect the normal operation of the circuit breaker. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a miniature circuit breaker proposed in this utility model;

[0015] Figure 2 This is a cross-sectional three-dimensional structural diagram of a miniature circuit breaker proposed in this utility model;

[0016] Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure at point A in the middle;

[0017] Figure 4 This is a three-dimensional structural diagram of the first mounting plate of a miniature circuit breaker proposed in this utility model;

[0018] Figure 5 This is a schematic diagram of the three-dimensional structure of the card block of a miniature circuit breaker proposed in this utility model.

[0019] In the diagram: 1. L-shaped plate; 2. Circuit breaker body; 3. Protective shell; 4. Rectangular groove; 5. External threaded pipe; 6. Connecting plate; 7. Locking block; 8. Rotating rod; 9. Knob; 10. Planar gear; 11. Circular rod; 12. End face gear; 13. Moving block; 14. Connecting rod; 15. Pull plate; 16. Rectangular plate; 17. Spring; 18. First mounting plate; 19. Second mounting plate; 20. Observation window. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-5 A miniature circuit breaker includes an L-shaped plate 1 with a rectangular opening. The circuit breaker body 2 is located on one side of the L-shaped plate 1. The rectangular opening allows the circuit breaker's circuit to be connected to a power source.

[0022] The L-shaped plate 1 is equipped with a protective shell 3. When the circuit breaker body 2 does not need to be operated, the protective shell 3 is combined to protect the internal circuit breaker body 2.

[0023] The L-shaped plate 1 has a rectangular groove 4, and symmetrically distributed external threaded pipes 5 are installed in the rectangular groove 4. One side of the L-shaped plate 1 is provided with a protective mechanism that controls the movement of the protective shell 3 through the external threaded pipes 5. Through the protective mechanism, the two protective shells 3 can be moved closer or further apart, which can protect the circuit breaker body 2 inside and facilitate the staff to inspect and operate the circuit breaker body 2.

[0024] A connecting plate 6 is fixedly connected to the top of the L-shaped plate 1, and a locking block 7 is provided below the connecting plate 6. The L-shaped plate 1 is provided with a fixing mechanism for installing the circuit breaker body 2 through the locking block 7. The fixing mechanism facilitates the installation and fixing of the circuit breaker body 2, and also facilitates its removal for inspection or replacement at any time.

[0025] The protective mechanism includes a rotating rod 8 rotatably connected to the L-shaped plate 1. A knob 9 is fixedly connected to one end of the rotating rod 8, and a planar gear 10 is fixedly connected to the other end of the rotating rod 8. A circular rod 11 is fixedly connected inside the rectangular groove 4. The circular rod 11 is located in the inner diameter of the external threaded tube 5. An end face gear 12 is fixedly connected to one end of the external threaded tube 5. The end face gear 12 meshes with the planar gear 10. Through the meshing of the planar gear 10 and the end face gear 12, the rotating rod 8 can drive the external threaded tube 5 to rotate. The circular rod 11 reinforces the external threaded tube 5 to prevent it from bending and affecting the movement of the protective shell 3.

[0026] A movable block 13 is fixedly connected to the bottom of the protective shell 3. The external threaded tube 5 is threadedly connected to the movable block 13. By rotating the external threaded tube 5, the movable block 13 can drive the protective shell 3 to move closer or further away from each other.

[0027] The circular rod 11 and the external threaded tube 5 have circular holes. The rotating rod 8 is located in the circular hole. The moving block 13 is slidably connected to the rectangular groove 4. One side of the protective shell 3 is attached to one side of the L-shaped plate 1. The rectangular groove 4 limits the moving block 13 so that it can only move along a straight line and avoids rotating with the external threaded tube 5.

[0028] The fixing mechanism includes a connecting rod 14 that is slidably connected to the connecting plate 6. A pull plate 15 is fixedly connected to one end of the connecting rod 14, and a rectangular plate 6 is fixedly connected to the other end of the connecting rod 14. The bottom of the rectangular plate 6 is fixedly connected to a locking block 7, and a spring 7 is fixedly connected to the top of the rectangular plate 6. One end of the spring 7 is fixedly connected to the connecting plate 6. A first mounting plate 18 is fixedly connected to one side of the circuit breaker body 2. The top of the first mounting plate 18 and the L-shaped plate 1 are provided with a locking groove. The locking block 7 is located in the locking groove. Through the elasticity of the spring 7, the connecting plate 6 is pressed tightly against the top of the L-shaped plate 1, and the trapezoidal locking block 7 is inserted into the locking groove to limit and fix the circuit breaker body 2.

[0029] The top of the rectangular plate 6 abuts against the top of the L-shaped plate 1. An installation groove is provided on one side of the L-shaped plate 1. The first installation plate 18 is located in the installation groove. The first installation plate 18 on one side of the circuit breaker body 2 is placed into the installation groove. The first installation plate 18 is in contact with the inclined edge of the locking block 7. Pressing continues, the spring 7 contracts, and the locking block 7 moves upward until the first installation plate 18 is completely inserted into the installation groove. The locking block 7 is locked into the slot under the elastic action of the spring 7, limiting the first installation plate 18. The installation is relatively convenient.

[0030] The L-shaped plate 1 is fixedly connected to the two sides of the second mounting plate 19. The second mounting plate 19 has mounting holes. The protective shell 3 has an observation window 20 on one side. The circuit breaker body 2 can be easily installed in a suitable position through the mounting holes on the second mounting plate 19. The observation window 20 is equipped with transparent glass, which allows for easy observation of the internal circuit breaker body 2 at any time.

[0031] The working principle of this utility model:

[0032] First, install the circuit breaker body 2 into the appropriate position through the mounting holes on the second mounting plate 19. Then, turn the knob 9 to rotate the rotating rod 8. The rotating rod 8 drives the planar gear 10 to rotate. The planar gear 10 drives the end face gear 12 to rotate. The end face gear 12 drives the external thread tube 5 to rotate on the surface of the circular rod 11. The external thread tube 5 drives the two moving blocks 13 to move closer to each other. The moving blocks 13 drive the protective shell 3 to move closer to each other until they are merged together to protect the internal circuit breaker body 2.

[0033] When the circuit breaker body 2 needs to be removed for maintenance or replacement, pull the connecting rod 14 upward by pulling the pull plate 15. The connecting rod 14 drives the rectangular plate 6 to rise, and the rectangular plate 6 drives the locking block 7 to rise. The spring 7 retracts until the locking block 7 moves out of the slot, and then the rectangular plate 6 can be removed from the mounting slot.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A miniature circuit breaker, comprising an L-shaped plate (1), characterized in that, The L-shaped plate (1) has a rectangular opening. A circuit breaker body (2) is provided on one side of the L-shaped plate (1). A protective shell (3) is provided on the L-shaped plate (1). A rectangular groove (4) is provided on the L-shaped plate (1). A symmetrically distributed external threaded tube (5) is provided in the rectangular groove (4). A protective mechanism is provided on one side of the L-shaped plate (1) to control the movement of the protective shell (3) through the external threaded tube (5). A connecting plate (6) is fixedly connected to the top of the L-shaped plate (1). A locking block (7) is provided below the connecting plate (6). A fixing mechanism is provided on the L-shaped plate (1) to install the circuit breaker body (2) through the locking block (7).

2. The miniature circuit breaker according to claim 1, characterized in that, The protective mechanism includes a rotating rod (8) rotatably connected to the L-shaped plate (1). A knob (9) is fixedly connected to one end of the rotating rod (8). A planar gear (10) is fixedly connected to one end of the rotating rod (8). A circular rod (11) is fixedly connected inside the rectangular groove (4). The circular rod (11) is located in the inner diameter of the external threaded tube (5). An end face gear (12) is fixedly connected to one end of the external threaded tube (5). The end face gear (12) meshes with the planar gear (10). A moving block (13) is fixedly connected to the bottom of the protective shell (3). The external threaded tube (5) is threadedly connected to the moving block (13).

3. A miniature circuit breaker according to claim 2, characterized in that, The circular rod (11) and the external threaded tube (5) have circular holes. The rotating rod (8) is located inside the circular holes. The moving block (13) is slidably connected to the rectangular groove (4). One side of the protective shell (3) is attached to one side of the L-shaped plate (1).

4. A miniature circuit breaker according to claim 3, characterized in that, The fixing mechanism includes a connecting rod (14) that is slidably connected to the connecting plate (6). One end of the connecting rod (14) is fixedly connected to a pull plate (15). One end of the connecting rod (14) is fixedly connected to a rectangular plate (6). The bottom of the rectangular plate (6) is fixedly connected to a locking block (7). The top of the rectangular plate (6) is fixedly connected to a spring (7). One end of the spring (7) is fixedly connected to the connecting plate (6). One side of the circuit breaker body (2) is fixedly connected to a first mounting plate (18). The top of the first mounting plate (18) and the L-shaped plate (1) are provided with a slot. The locking block (7) is located in the slot.

5. A miniature circuit breaker according to claim 4, characterized in that, The top of the rectangular plate (6) abuts against the top of the L-shaped plate (1), and an installation groove is provided on one side of the L-shaped plate (1), with the first installation plate (18) located in the installation groove.

6. A miniature circuit breaker according to claim 5, characterized in that, The L-shaped plate (1) is fixedly connected to two sides of a second mounting plate (19), the second mounting plate (19) has mounting holes, and the protective shell (3) has an observation window (20) on one side.

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