Contact structure of molded case circuit breaker

Abstract

The utility model discloses a contact structure of a plastic shell type circuit breaker, which comprises a fixing part, a connecting groove is arranged on one side of the top surface of the fixing part, a plug block is arranged in the connecting groove, an electric shock piece is arranged at the top end of the plug block, and a limiting block is arranged on the surface of one side of the plug block. According to the utility model, through rotating the positioning screw rod on the surface of one side of the fixing part, one end of the positioning screw rod extends into the positioning hole arranged on the surface of one side of the plugging block, so that the electric shock sheet can be fixedly installed; the electric shock piece can be disassembled by moving the electric shock piece and moving the electric shock piece upwards when the limiting block is far away from the limiting groove, so that the electric shock piece can be disassembled and replaced independently, the whole electric shock piece does not need to be disassembled and replaced, the use cost of the electric shock piece is reduced, and the electric shock piece can be disassembled and replaced conveniently. And the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of breaker accessories, in particular to a contact structure of a plastic case circuit breaker. Background Technique

[0002] A plastic case circuit breaker is a type of circuit breaker that can automatically cut off the power supply when the current exceeds the tripping setting. The plastic case refers to a plastic insulating housing. There are terminal posts at both ends of the plastic case circuit breaker. The static contact is used to connect the terminal post and the moving contact, and the static contact is mostly fixed on the plastic case circuit breaker.

[0003] The existing Chinese patent with the publication number CN206163443U discloses a static contact of a plastic case circuit breaker. The key points of its technical solution are as follows: It solves the problem that it is difficult to quickly position and install the static contact of the plastic case circuit breaker at a position matching the moving contact, and the installation process is cumbersome. The key points of its technical solution are a static contact of a plastic case circuit breaker, including a U-shaped bearing part. The bearing part includes a first clamping arm and a second clamping arm. The end of the first clamping arm extends outward to have a connecting part, and the other end of the connecting part is integrally connected with a fixing part for fixing the static contact. A positioning component is arranged on the fitting surface of the fixing part. The positioning component includes convex points and concave holes arranged at intervals. The static contact of the plastic case circuit breaker of the utility model can quickly position and fix the static contact, which is convenient for the stability and convenience of fixed connection and is easy to operate.

[0004] The above-mentioned existing technical solution has the following defects. Although the above-mentioned technical solution solves the problem that it is difficult to quickly position and install the static contact of the plastic case circuit breaker at a position matching the moving contact, and the installation process is cumbersome, in the above-mentioned technical solution, the contact piece and the arc guiding block are fixedly installed. When the contact piece is damaged and needs to be disassembled and replaced, there is a problem that it is inconvenient to disassemble. Therefore, it can only be disassembled as a whole for replacement, so it is inconvenient to disassemble and replace the contact piece alone, increasing its use cost. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the existing technology, the utility model provides a contact structure of a plastic case circuit breaker, which has the advantages of being convenient to disassemble and replace the contact piece alone, strong practicability, and reducing its use cost, thereby solving the problems in the above-mentioned background technique.

[0007] (2) Technical Solution

[0008] To achieve the above object, the present utility model adopts the following technical solutions: The contact structure of a plastic case circuit breaker includes a fixing part. On one side of the top surface of the fixing part, a connection groove is opened, and a plug-in block is provided in the connection groove. The top end of the plug-in block is provided with an electric contact piece. On one side surface of the plug-in block, a limiting block is provided, and one end of the limiting block extends into the internal of a limiting groove opened on one side of the inner wall of the connection groove. On one side surface of the fixing part, a positioning screw penetrates through the connection groove, and one end of the positioning screw extends into the internal of a positioning hole opened on one side surface of the plug-in block.

[0009] Preferably, two mounting holes penetrate through both sides of the top surface of the fixing part. The two mounting holes are evenly distributed on both sides of the top surface of the fixing part.

[0010] Preferably, the plug-in block is movably connected to the connection groove.

[0011] Preferably, the diameter of the limiting block is smaller than the diameter of the limiting groove.

[0012] Preferably, the positioning screw is threadedly connected to the positioning hole.

[0013] Preferably, a turning handle is provided at one end of the positioning screw located outside the fixing part.

[0014] Preferably, the limiting block is movably connected to the limiting groove.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present utility model provides a contact structure of a plastic case circuit breaker, which has the following beneficial effects:

[0017] (1) In the present utility model, the plug-in block on the bottom surface of the electric contact piece is inserted into the connection groove opened on the top surface of the fixing part. By moving the electric contact piece, the plug-in block moves in the connection groove. When the limiting block on one side surface of the plug-in block extends into the limiting groove opened on one side of the inner wall of the connection groove, by rotating the positioning screw on one side surface of the fixing part, one end of the positioning screw extends into the positioning hole opened on one side surface of the plug-in block, and then the electric contact piece can be fixedly installed. When the electric contact piece is damaged, by rotating the positioning screw, one end of the positioning screw moves away from the positioning hole on one side surface of the plug-in block. By moving the electric contact piece, when the limiting block moves away from the limiting groove, by moving the electric contact piece upward, the electric contact piece can be disassembled, so that the electric contact piece can be disassembled and replaced separately, without disassembling and replacing the whole, reducing its use cost and improving its practicability.

[0018] (2) In this utility model, by using the limit block and the limit groove, the position of the electric shock piece can be limited. And by using the positioning screw and the positioning hole in cooperation, the electric shock piece can be fixed in the connection groove, preventing the electric shock piece from tilting and shifting during use, reducing the disadvantages during use, and thus being beneficial to improving the firmness of the electric shock piece during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic structural diagram of the contact structure of the plastic case circuit breaker proposed by the present utility model;

[0021] Figure 2 is an enlarged view of A of the contact structure of the plastic case circuit breaker proposed by the present utility model;

[0022] Figure 3 is a top view of the contact structure of the plastic case circuit breaker proposed by the present utility model;

[0023] Figure 4 is a schematic structural diagram of the electric shock piece of the contact structure of the plastic case circuit breaker proposed by the present utility model.

[0024] Legend Explanation:

[0025] 1. Fixed part; 2. Electric shock piece; 3. Limit block; 4. Limit groove; 5. Positioning screw; 6. Connection groove; 7. Positioning hole; 8. Insertion block; 9. Mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Please refer to Figures 1-4 , the contact structure of the plastic case circuit breaker includes a fixed part 1. On one side of the top surface of the fixed part 1, a connection groove 6 is opened, and an insertion block 8 is arranged in the connection groove 6. An electric contact piece 2 is arranged at the top end of the insertion block 8. A limiting block 3 is arranged on one side surface of the insertion block 8, and one end of the limiting block 3 extends into the inside of a limiting groove 4 opened on one side of the inner wall of the connection groove 6. A positioning screw 5 penetrates through the connection groove 6 on one side surface of the fixed part 1, and one end of the positioning screw 5 extends into the inside of a positioning hole 7 opened on one side surface of the insertion block 8. Among them, the insertion block 8 on the bottom surface of the electric contact piece 2 is inserted into the connection groove 6 opened on the top surface of the fixed part 1. By moving the electric contact piece 2, the insertion block 8 moves in the connection groove 6. When the limiting block 3 on one side surface of the insertion block 8 extends into the limiting groove 4 opened on one side of the inner wall of the connection groove 6, by rotating the positioning screw 5 on one side surface of the fixed part 1, one end of the positioning screw 5 extends into the positioning hole 7 opened on one side surface of the insertion block 8, and the electric contact piece 2 can be fixedly installed. Among them, when the electric contact piece 2 is damaged, by rotating the positioning screw 5, one end of the positioning screw 5 is far away from the positioning hole 7 on one side surface of the insertion block 8. By moving the electric contact piece 2, when the limiting block 3 is far away from the limiting groove 4, by moving the electric contact piece 2 upward, the electric contact piece 2 can be disassembled, so that the electric contact piece 2 can be disassembled and replaced separately, without disassembling and replacing the whole, reducing its use cost and improving its practicability.

[0029] In one embodiment, two mounting holes 9 penetrate through both sides of the top surface of the fixed part 1. There are two mounting holes 9 in total, and the two mounting holes 9 are evenly distributed on both sides of the top surface of the fixed part 1. Among them, through the use of the mounting holes 9, the fixed part 1 can be fixedly installed.

[0030] In one embodiment, the plug-in block 8 is movably connected to the connection groove 6, facilitating the movement of the plug-in block 8 in the connection groove 6.

[0031] In one embodiment, the diameter of the limiting block 3 is smaller than the diameter of the limiting groove 4, facilitating the insertion of the limiting block 3 into the limiting groove 4, thereby enabling the limitation of the position of the electric shock piece 2.

[0032] In one embodiment, the positioning screw 5 is threadedly connected to the positioning hole 7. By using the cooperation of the positioning screw 5 and the positioning hole 7, the electric shock piece 2 can be fixed in the connection groove 6, preventing the electric shock piece 2 from tilting and shifting during use, reducing the drawbacks during use, and thus being beneficial to improving the firmness of the electric shock piece 2 during use.

[0033] In one embodiment, a rotating handle is provided at one end of the positioning screw 5 located outside the fixing portion 1. By using the rotating handle, it is convenient to rotate the positioning screw 5.

[0034] In one embodiment, the limiting block 3 is movably connected to the limiting groove 4, enabling the limiting block 3 to move in the limiting groove 4, thereby allowing the removal of the electric shock piece 2.

[0035] Working principle:

[0036] During use, insert the plug-in block 8 on the bottom surface of the electric shock piece 2 into the connection groove 6 opened on the top surface of the fixing portion 1. By moving the electric shock piece 2, the plug-in block 8 moves in the connection groove 6. When the limiting block 3 on one side surface of the plug-in block 8 extends into the limiting groove 4 opened on one side of the inner wall of the connection groove 6, then rotate the positioning screw 5 on one side surface of the fixing portion 1, so that one end of the positioning screw 5 extends into the positioning hole 7 opened on one side surface of the plug-in block 8, and the electric shock piece 2 can be fixedly installed. When the electric shock piece 2 is damaged, by rotating the positioning screw 5, one end of the positioning screw 5 is moved away from the positioning hole 7 on one side surface of the plug-in block 8. By moving the electric shock piece 2, when the limiting block 3 moves away from the limiting groove 4, and then by moving the electric shock piece 2 upward, the electric shock piece 2 can be disassembled, so that the electric shock piece 2 can be disassembled and replaced individually without disassembling the whole, reducing its use cost and improving its practicability. By using the limiting block 3 and the limiting groove 4, the position of the electric shock piece 2 can be limited. By using the cooperation of the positioning screw 5 and the positioning hole 7, the electric shock piece 2 can be fixed in the connection groove 6, preventing the electric shock piece 2 from tilting and shifting during use, reducing the drawbacks during use, and thus being beneficial to improving the firmness of the electric shock piece 2 during use.

[0037] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. A contact structure of a plastic case circuit breaker, comprising a fixing portion (1), characterized in that: A connection groove (6) is provided on one side of the top surface of the fixing portion (1), and a plug-in block (8) is provided in the connection groove (6); a contact plate (2) is provided at the top of the plug-in block (8); a limit block (3) is provided on one side surface of the plug-in block (8), and one end of the limit block (3) extends to the inside of a limit groove (4) provided on one side of the inner wall of the connection groove (6); a positioning screw (5) is provided on one side surface of the fixing portion (1) through the connection groove (6), and one end of the positioning screw (5) extends to the inside of a positioning hole (7) provided on one side surface of the plug-in block (8).

2. The contact structure of the plastic case circuit breaker according to claim 1, characterized in that: Mounting holes (9) are provided through both sides of the top surface of the fixing portion (1), and there are two mounting holes (9) in total, and the two mounting holes (9) are evenly distributed on both sides of the top surface of the fixing portion (1).

3. The contact structure of the plastic case circuit breaker according to claim 1, characterized in that: The plug-in block (8) is movably connected to the connection slot (6).

4. The contact structure of the plastic case circuit breaker according to claim 1, characterized in that: The diameter of the limiting block (3) is smaller than the diameter of the limiting groove (4).

5. The contact structure of the plastic case circuit breaker according to claim 1, characterized in that: The positioning screw (5) is threadedly connected to the positioning hole (7).

6. The contact structure of the plastic case circuit breaker according to claim 1, characterized in that: One end of the positioning screw rod (5) is located outside the fixing portion (1) and is provided with a turning handle.

7. The contact structure of the plastic case circuit breaker according to claim 1, characterized in that: The limiting block (3) is movably connected to the limiting groove (4).

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