Miniature circuit breaker convenient to maintain

Abstract

The utility model discloses a miniature circuit breaker convenient to maintain, which relates to the field of circuit breakers and comprises a circuit breaker main body, two wiring terminals are movably mounted in the circuit breaker main body, a fixing assembly is movably mounted on the circuit breaker main body at the same time, and the fixing assembly is composed of an insulating connecting rod, a first spring, a connecting plate, a connecting rod and a connecting latch. The number of the insulating connecting rods, the number of the first springs, the number of the connecting plates, the number of the connecting rods and the number of the connecting latches are all two, the insulating connecting rods are fixedly installed at one ends of the wiring terminals, the insulating connecting rods are sleeved with the first springs, and the fixing assembly is arranged on the circuit breaker body and connected with the two wiring terminals at the same time. When the circuit breaker body needs to be separated from the electric wires, the fixing assembly can be pushed by hands, so that the two wiring terminals are pushed to move through the fixing assembly at the same time, fixed connection between the circuit breaker body and the two electric wires is removed at the same time, the process is simple and convenient, and finally maintenance of the circuit breaker body is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, and in particular to a small circuit breaker that is easy to maintain. Background Technology

[0002] Miniature circuit breakers, also known as micro circuit breakers, are common electrical protection devices. They are small in size and compact in structure, generally consisting of an operating mechanism, contacts, and protective devices (arc extinguishing systems). Functionally, miniature circuit breakers can connect and disconnect load current under normal conditions, and can automatically disconnect the circuit in case of overload, short circuit, undervoltage, or other faults, thereby protecting the safety of electrical equipment and lines. Their working principle is based on electromagnetic induction and thermal effects. When the current exceeds a set value, the heating element causes the bimetallic strip to bend, pushing the tripping mechanism to activate and break the circuit. Miniature circuit breakers are widely used in power distribution systems in residential, commercial buildings, and industrial sites.

[0003] Miniature circuit breakers typically consist of two ends: the upper end is the incoming terminal, and the lower end is the outgoing terminal. When wiring, the insulation of both wires must be stripped to a suitable length, and each wire is inserted into its corresponding terminal block. Then, the two screws are tightened securely to the wires. When maintenance is required to separate the circuit breaker from the wires, these two screws must also be loosened to release the connection. However, this method of securing the circuit breaker makes the process of disconnection quite cumbersome, causing considerable inconvenience for circuit breaker maintenance. Utility Model Content

[0004] The main objective of this invention is to provide a small circuit breaker that is easy to maintain, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A convenient-to-maintain miniature circuit breaker includes a circuit breaker body. Two terminals are movably installed within the circuit breaker body. A fixing assembly is also movably installed on the circuit breaker body. The fixing assembly consists of an insulating connecting rod, a first spring, a connecting plate, a connecting rod, and connecting teeth. Two of each of the insulating connecting rod, first spring, connecting plate, connecting rod, and connecting teeth are provided. The insulating connecting rod is fixedly installed at one end of the terminals. The first spring is sleeved on the insulating connecting rod. The connecting plate is fixedly installed at one end of the insulating connecting rod. The connecting rod is fixedly installed on the two connecting plates. The connecting teeth are fixedly installed at one end of the connecting plates. Two limiting assemblies are symmetrically fixedly installed on the circuit breaker body. Each limiting assembly consists of a limiting base rod, a second spring, an anti-detachment top plate, and a movable plate. Two of each of the limiting base rod, second spring, and anti-detachment top plate are provided. The second spring is sleeved on the limiting base rod. The anti-detachment top plate is fixedly installed at one end of the limiting base rod. The movable plate is slidably installed on the two limiting base rods and is simultaneously located between the second spring and the anti-detachment top plate.

[0007] Preferably, the circuit breaker body is provided with two wiring slots, and the front end of the circuit breaker body is provided with two connecting holes, which are connected to the wiring slots. A stationary contact piece is fixedly installed in the wiring slot.

[0008] Preferably, the terminal block is movably installed in the wiring groove provided on the circuit breaker body, and the terminal block is movably sleeved on the stationary contact piece.

[0009] Preferably, the insulating connecting rod on the fixing assembly is movably inserted into the communicating hole opened on the circuit breaker body, the first spring is located on the front side of the circuit breaker body, and the two connecting rods are respectively located on the left and right sides of the circuit breaker body.

[0010] Preferably, the limiting base rod on the limiting assembly is fixedly installed on the circuit breaker body.

[0011] Preferably, the movable plate on the limiting component has two symmetrically formed mounting through holes. The movable plate is movably fitted onto the limiting base rod through the mounting through holes. One end of the movable plate has several locking grooves. The movable plate is fitted onto the connecting teeth on the fixing component through the locking grooves.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By installing a fixing component on the circuit breaker body and connecting the fixing component to two terminals, when it is necessary to maintain the circuit breaker body and disconnect it from the wires, the fixing component can be pushed by hand. This allows the fixing component to simultaneously move the two terminals, thereby releasing the fixing connection between the circuit breaker body and the two wires. This process is relatively simple and convenient, ultimately facilitating the maintenance of the circuit breaker body. By setting a limit component and having it work in conjunction with the fixing component, the fixing component can be limited and fixed, thus preventing the fixing component from moving due to accidental force during use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the main body of the circuit breaker of this utility model;

[0016] Figure 3 This is a schematic diagram of the wiring terminal and fixing assembly of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the movable plate of this utility model after being cut apart.

[0018] In the diagram: 1. Circuit breaker body; 2. Terminal block; 3. Fixing assembly; 4. Limiting assembly; 5. Wiring groove; 6. Connecting hole; 7. Insulating connecting rod; 8. First spring; 9. Connecting plate; 10. Connecting rod; 11. Connecting tooth; 12. Limiting base rod; 13. Second spring; 14. Anti-detachment top plate; 15. Mounting through hole; 16. Moving plate; 17. Tooth groove; 18. Stationary contact piece. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a convenient-to-maintain miniature circuit breaker includes a circuit breaker body 1. Two terminals 2 are movably installed inside the circuit breaker body 1. A fixing assembly 3 is also movably installed on the circuit breaker body 1. The fixing assembly 3 consists of an insulating connecting rod 7, a first spring 8, a connecting plate 9, a connecting rod 10, and connecting teeth 11. Two insulating connecting rods 7, two first springs 8, two connecting plates 9, two connecting rods 10, and two connecting teeth 11 are provided. The insulating connecting rod 7 is fixedly installed at one end of the terminal 2. The first spring 8 is sleeved on the insulating connecting rod 7. The connecting plate 9 is fixedly installed at one end of the insulating connecting rod 7. The connecting rod 10 is fixedly installed on both connecting plates 9. The connecting teeth 11 are fixedly installed at one end of the connecting plate 9. Two limiting assemblies 4 are symmetrically fixedly installed on the circuit breaker body 1. The limiting assembly 4 consists of a limiting base rod 12, a second spring 13, an anti-detachment top plate 14, and a moving plate 16. The limiting base rod 12, the second spring 13... Two anti-detachment top plates 14 are provided. The second spring 13 is sleeved on the limiting base rod 12. The anti-detachment top plate 14 is fixedly installed on one end of the limiting base rod 12. The moving plate 16 is slidably installed on the two limiting base rods 12, and the moving plate 16 is simultaneously located between the second spring 13 and the anti-detachment top plate 14. Thus, by setting the fixing component 3 on the circuit breaker body 1 and connecting the fixing component 3 to the two terminals 2, when it is necessary to maintain the circuit breaker body 1 and disconnect it from the wires, the fixing component 3 can be pushed by hand. Thus, the fixing component 3 simultaneously pushes the two terminals 2 to move, thereby simultaneously releasing the fixed connection between the circuit breaker body 1 and the two wires. This process is relatively simple and convenient, and ultimately facilitates the maintenance of the circuit breaker body 1. By setting the limiting component 4 and having it cooperate with the fixing component 3, the fixing component 3 can be limited and fixed, thereby preventing the fixing component 3 from moving due to accidental force during use.

[0021] Specifically, the circuit breaker body 1 has two wiring slots 5, and two connecting holes 6 are opened at the front end of the circuit breaker body 1, which are connected to the wiring slots 5. A stationary contact piece 18 is fixedly installed in the wiring slot 5. The terminal 2 is movably installed in the wiring slot 5 on the circuit breaker body 1 and is movably sleeved on the stationary contact piece 18. The insulating connecting rod 7 on the fixing assembly 3 is movably inserted into the connecting hole 6 on the circuit breaker body 1. The first spring 8 is located on the front side of the circuit breaker body 1. The two connecting rods 10 are located on the left and right sides of the circuit breaker body 1, respectively. The limiting base rod 12 on the limiting assembly 4 is fixedly installed on the circuit breaker body 1. Two mounting through holes 15 are symmetrically opened on the movable plate 16 of the limiting component 4. The movable plate 16 is movably sleeved on the limiting base rod 12 through the mounting through holes 15. Several locking tooth grooves 17 are opened at one end of the movable plate 16. The movable plate 16 is sleeved on the connecting tooth 11 on the fixing component 3 through the locking tooth grooves 17. When the wire is connected to the circuit breaker body 1, the two wires with a section of the outer sheath stripped are inserted into the two terminals 2 respectively, and the wires are made to contact the stationary contact piece 18 in the wiring groove 5. At this time, the terminal 2 is movably installed in the wiring groove 5 and sleeved on the stationary contact piece 18, which will play the role of fixing the wire in subsequent steps.

[0022] Since the insulating rod 7 of the fixing component 3 is fixedly installed at one end of the terminal 2, and the insulating rod 7 is movably inserted into the through hole 6 opened on the circuit breaker body 1, the first spring 8 is sleeved on the insulating rod 7 and located on the front side of the circuit breaker body 1, the connecting plate 9 is fixedly installed at one end of the insulating rod 7, and the connecting rod 10 is fixedly installed on the two connecting plates 9, in the natural state, the first spring 8 is in the normal extended state, which provides a certain support for the terminal 2, ensuring good contact between the terminal 2 and the stationary contact piece 18 and the wire. At the same time, the moving plate 16 on the limiting component 4 is movably sleeved on the limiting base rod 12 through the mounting through hole 15, and the locking groove 17 at one end of the moving plate 16 is sleeved on the connecting locking tooth 11 on the fixing component 3. The elastic force generated by the second spring 13 sleeved on the limiting base rod 12 makes the moving plate 16 tightly lock the connecting locking tooth 11, thereby fixing the position of the fixing component 3 and the terminal 2, ensuring that the wire is stably connected to the circuit breaker body 1.

[0023] When maintenance is required on the circuit breaker body 1 and it needs to be separated from the wires, push the movable plate 16 on the limiting assembly 4 away from the connecting plate 9 by hand. At this time, the movable plate 16 overcomes the elastic force of the second spring 13 and slides along the limiting base rod 12, causing the locking groove 17 at one end of the movable plate 16 to separate from the connecting locking teeth 11 on the fixing assembly 3, thereby releasing the limitation on the fixing assembly 3. Then push the fixing assembly 3 by hand. Since the connecting rod 10 is fixed on the two connecting plates 9, pushing the connecting rod 10 will drive the two insulating connecting rods 7 to move synchronously. The insulating connecting rod 7 is fixedly installed at one end of the terminal 2, so it will simultaneously push the two terminal 2 to move in the wiring slot 5. After the terminal 2 moves, the connection with the wires is released. At this time, the two wires can be pulled out from the wiring slot 5 to complete the disassembly process. Then the circuit breaker body 1 can be maintained.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A miniature circuit breaker of the type comprising a circuit breaker body (1) in which two terminals (2) are movably mounted, characterized in that: The fixed assembly (3) is movably installed on the circuit breaker body (1), the fixed assembly (3) is composed of an insulating connecting rod (7), a first spring (8), a connecting plate (9), a connecting rod (10) and a connecting tooth (11), the insulating connecting rod (7), the first spring (8), the connecting plate (9), the connecting rod (10) and the connecting tooth (11) are provided with two, the insulating connecting rod (7) is fixedly installed on one end of the terminal (2), the first spring (8) is sleeved on the insulating connecting rod (7), the connecting plate (9) is fixedly installed on one end of the insulating connecting rod (7), the connecting rod (10) is fixedly installed on the two connecting plates (9), the connecting tooth (11) is fixedly installed on one end of the connecting plate (9), the circuit breaker body (1) is symmetrically provided with two limiting assemblies (4), the limiting assembly (4) is composed of a limiting base rod (12), a second spring (13), an anti-dropping top plate (14) and a moving plate (16), the limiting base rod (12), the second spring (13) and the anti-dropping top plate (14) are provided with two, the second spring (13) is sleeved on the limiting base rod (12), the anti-dropping top plate (14) is fixedly installed on one end of the limiting base rod (12), the moving plate (16) is slidably installed on the two limiting base rods (12), and the moving plate (16) is located between the second spring (13) and the anti-dropping top plate (14).

2. A small circuit breaker with easy maintenance according to claim 1, characterized in that: The circuit breaker body (1) is provided with two wiring grooves (5), the front end of the circuit breaker body (1) is provided with two communication holes (6), and the communication holes (6) are communicated with the wiring grooves (5), and the static contact piece (18) is fixedly installed in the wiring groove (5).

3. A small circuit breaker with easy maintenance according to claim 2, characterized in that: The terminal (2) is movably installed in the wiring groove (5) provided on the circuit breaker body (1), and the terminal (2) is movably sleeved on the static contact piece (18).

4. A small circuit breaker with easy maintenance according to claim 3, characterized in that: The insulating connecting rod (7) on the fixed assembly (3) is movably inserted into the communication hole (6) formed on the circuit breaker body (1), the first spring (8) is located on the front side of the circuit breaker body (1), and the two connecting rods (10) are respectively located on the left and right sides of the circuit breaker body (1).

5. A small circuit breaker with easy maintenance according to claim 4, characterized in that: The limiting base rod (12) of the limiting assembly (4) is fixedly installed on the circuit breaker body (1).

6. A small circuit breaker with easy maintenance according to claim 5, characterized in that: Two installation through holes (15) are symmetrically formed on the moving plate (16) of the limiting assembly (4), the moving plate (16) is movably sleeved on the limiting base rod (12) through the installation through hole (15), and a plurality of tooth grooves (17) are formed on one end of the moving plate (16), and the moving plate (16) is sleeved on the connecting tooth (11) of the fixed assembly (3) through the tooth groove (17).

Images