Plastic shell type circuit breaker

Abstract

A plastic shell type circuit breaker comprises a circuit breaker body and square frames, the upper portions and the lower portions of the front side and the rear side of the circuit breaker body are fixedly connected with the inner sides of the square frames respectively, the inner walls of the multiple square frames are connected with control structures respectively, the inner walls of the multiple control structures are connected with protection pads respectively, and second straight plates are fixedly connected to the upper portions of the front side and the rear side of the circuit breaker body respectively. Installation structures are connected below the front side and the rear side of the circuit breaker respectively, round openings are machined in the front side and the rear side of the circuit breaker respectively, the square block slides towards the outer side on the inner wall of the square frame, the square block drives the vertical plate to move towards the outer side, the moving vertical plate enables the support to move towards the outer side, and the support moves towards the outer side as much as possible on the premise that the support does not make contact with components of the distribution box. And then the handle drives the screw rod to rotate inwards, so that the end part of the inner side of the screw rod is inserted into a round opening in the outer wall of the circuit breaker, at the moment, a lead connected with the upper and lower parts of the circuit breaker can be attached to a protection pad on the inner wall of the bracket, and the bending position is changed at the protection pad, so that the normal use of the circuit breaker is ensured, and the service life of the circuit breaker is ensured.

Description

Technical Field

[0001] The utility model relates to a plastic case type circuit breaker, in particular to a plastic case type circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions and can close, carry and interrupt current under abnormal circuit conditions within a specified time.

[0003] For example, a plastic-cased circuit breaker with the authorization announcement number "CN206225298U" includes a circuit breaker body, a connecting plate and an insulating bottom plate. The circuit breaker body is provided with three poles, two of which are connected in series through the connecting plate. By adopting the circuit breaker of the utility model and connecting the two poles of the circuit breaker in series, the three-pole circuit breaker can be used in a photovoltaic DC power generation system. However, when the circuit breaker is in use, it needs to be installed and used with a distribution cabinet. At the same time, the upper and lower sides of the circuit breaker need to be connected with wires, and there are other components inside the distribution cabinet. This requires bending the wires, which can easily bend the copper sheet at the connection between the circuit breaker and the wire. At this time, the installed circuit breaker needs to be disassembled and replaced, which causes the circuit breaker to be unable to be used normally and shortens the service life of the circuit breaker. Summary of the invention

[0004] The utility model aims to solve the problems existing in the prior art and provides a plastic cased circuit breaker to ensure the normal use of the circuit breaker and guarantee the service life of the circuit breaker.

[0005] The utility model adopts a technical solution to solve the technical problem: the plastic shell type circuit breaker comprises a circuit breaker and a square frame, the front and rear sides of the circuit breaker are respectively fixedly connected to the inner side of the square frame, the inner walls of the plurality of square frames are respectively connected to control structures, the inner walls of the plurality of control structures are respectively connected to pads, the upper parts of the front and rear sides of the circuit breaker are respectively fixedly connected to second straight plates, the lower parts of the front and rear sides of the circuit breaker are respectively connected to mounting structures, and the front and rear sides of the circuit breaker are respectively processed with round openings.

[0006] For further improvement, the control structure includes a block and a screw, the outer wall of the block fits with the inner wall of the square frame, the inner wall of the block is threadedly connected to the outer wall of the screw, a handle is fixed to the outer wall of the screw, a vertical plate is fixed to the outer wall of the block, and a bracket is fixed to the outer side of the vertical plate.

[0007] For further improvement, the outer wall of the vertical plate is plugged into the outer wall notch of the square frame.

[0008] For further improvement, the inner side of the outer wall of the screw rod is plugged into the circular opening of the outer wall of the circuit breaker.

[0009] Further improvement, the inner wall of the bracket is fixedly connected to the right side of the pad.

[0010] Further improvement, the mounting structure includes a first straight plate and a slide groove, the inner sides of the two first straight plates are respectively fixedly connected to the lower front and rear sides of the circuit breaker, the inner wall of the first straight plate is processed with a slide groove, the inner wall of the slide groove is slidably clamped with a straight cylinder, and the inner diameter of the straight cylinder is consistent with the inner wall diameter of the second straight plate.

[0011] The beneficial effect of the utility model is as follows: the utility model, by holding the handle in the control structure, drives the screw to rotate outward through the inner wall of the square plate, at this time the inner side of the outer wall of the screw is separated from the circular opening of the outer wall of the circuit breaker, and then the square slides outward on the inner wall of the square frame, the square drives the vertical plate to move outward, the moving vertical plate drives the bracket to move outward, so that the bracket moves outward as much as possible without contacting the components of the distribution box, and then the handle drives the screw to rotate inward, so that the inner end of the screw is plugged into the circular opening of the outer wall of the circuit breaker, at this time the wires connected above and below the circuit breaker can fit with the inner wall pad of the bracket, and are completed at the pad to change the bending position, so as to ensure the normal use of the circuit breaker and the service life of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 for Figure 1 A schematic diagram of the connection relationship between the middle block, the screw and the handle;

[0014] Figure 3 for Figure 1 Schematic diagram of the structure of the middle pad;

[0015] Figure 4 for Figure 1 The structural diagram of the middle frame;

[0016] Figure 5 for Figure 1 The structural diagram of A in the figure;

[0017] Figure 6 for Figure 1 Schematic diagram of the structure of B.

[0018] Explanation of the reference numerals: 1. circuit breaker, 2. control structure, 201. block, 202. screw, 203. handle, 204. vertical plate, 205. bracket, 3. mounting structure, 301. first straight plate, 302. slide groove, 303. straight cylinder, 4. square frame, 5. second straight plate, 6. protective pad, 7. frame. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings: Embodiment 1:

[0020] Refer to the attached Figure 1-6 In the present embodiment, a plastic cased circuit breaker comprises a circuit breaker 1 and a square frame 4. The front and rear sides of the circuit breaker 1 are fixedly connected to the inner side of the square frame 4 respectively. The inner walls of the plurality of square frames 4 are respectively connected to control structures 2. The inner walls of the plurality of control structures 2 are respectively connected to protective pads 6. The protective pads 6 are rubber plates. The upper parts of the front and rear sides of the circuit breaker 1 are respectively fixedly connected to second straight plates 5. The lower parts of the front and rear sides of the circuit breaker 1 are respectively connected to mounting structures 3. How to operate and use the circuit breaker 1 is already an existing technology. No further explanation will be given. The model is selected according to the use requirements. The front and rear sides of the circuit breaker 1 are respectively processed with round openings.

[0021] The control structure 2 includes a block 201 and a screw 202. The outer wall of the block 201 fits with the inner wall of the square frame 4. The inner wall of the block 201 is threadedly connected to the outer wall of the screw 202. The screw 202 is subjected to force and rotates forward and backward through the inner wall of the block 202. A handle 203 is fixedly connected to the outer side of the screw 202. The handle 203 is convenient for driving the screw 202 to rotate. A vertical plate 204 is fixedly connected to the outer wall of the block 201. A bracket 205 is fixedly connected to the outer side of the vertical plate 204.

[0022] By holding the handle 203 in the control structure 2 and rotating the screw 202 through the inner wall of the square plate 201 toward the outside, the inner side of the outer wall of the screw 202 is separated from the circular opening of the outer wall of the circuit breaker 1, and then the block 201 slides toward the outside on the inner wall of the square frame 4, and the block 201 moves the vertical plate 204 toward the outside, and the moving vertical plate 204 moves the bracket 205 toward the outside, so that the bracket 205 moves as far as possible outward without contacting the components of the distribution box, and then the handle 203 rotates the screw 202 toward the inside, so that the inner end of the screw 202 is plugged into the circular opening of the outer wall of the circuit breaker 1, and the wires connected up and down the circuit breaker 1 can fit with the inner wall pad 6 of the bracket 205, and are completed at the pad 6 to change the bending position, ensure the normal use of the circuit breaker, and ensure the service life of the circuit breaker.

[0023] The outer wall of the vertical plate 204 is plugged into the outer wall groove of the square frame 4, and the vertical plate 204 moves up and down through the outer wall groove of the square frame 4 under force. The inner side of the outer wall of the screw 202 is plugged into the circular opening of the outer wall of the circuit breaker 1, and the inner wall of the bracket 205 is fixedly connected to the right side of the pad 6. The mounting structure 3 includes a first straight plate 301 and a slide groove 302. The inner sides of the two first straight plates 301 are respectively fixedly connected to the lower front and rear sides of the circuit breaker 1. The inner wall of the first straight plate 301 is processed with a slide groove 302, and the inner wall of the slide groove 302 is slidably connected with a straight cylinder 303. The straight cylinder 303 slides back and forth through the inner wall of the slide groove 302 under force, and the inner diameter of the straight cylinder 303 is consistent with the inner wall diameter of the second straight plate 5.

[0024] Working principle:

[0025] Circuit breaker installation:

[0026] Make the left side of the circuit breaker 1 fit with the internal mounting plate of the distribution box, then the bolt thread passes through the second straight plate 5 to fix it to the mounting plate, then the straight cylinder 303 slides back and forth on the inner wall of the first straight plate 301 to adjust the position of the straight cylinder 303, and then the bolt thread passes through the straight cylinder 303 to fix it to the mounting plate to complete the installation of the circuit breaker 1. The outer shell of the circuit breaker 1 is a plastic shell.

[0027] Circuit breaker wire limits:

[0028] The hand holds the handle 203 and rotates the screw 202 outward through the inner wall of the square plate 201. At this time, the inner side of the outer wall of the screw 202 is separated from the circular opening of the outer wall of the circuit breaker 1, and then the block 201 slides outward on the inner wall of the square frame 4, and the block 201 moves the vertical plate 204 outward. The moving vertical plate 204 moves the bracket 205 outward, so that the bracket 205 moves as far as possible outward without contacting the components of the distribution box. Then the handle 203 rotates the screw 202 inward, so that the inner end of the screw 202 is plugged into the circular opening of the outer wall of the circuit breaker 1. At this time, the wires connected up and down the circuit breaker 1 can fit with the inner wall pad 6 of the bracket 205, and the pad 6 is completed to change the bending position. Embodiment 2:

[0029] Refer to the attached Figure 1-6 In this embodiment, a plastic case circuit breaker includes a frame 7, and the right side of the frame 7 is fixedly connected to the left side of the circuit breaker 1.

[0030] Working principle:

[0031] After the circuit breaker 1 and the mounting plate are fixed, the frame 7 will be sandwiched between the two. The frame 7 can play a cushioning role through its own rubber material to prevent the mounting plate from causing wear on the connection surface of the circuit breaker 1.

[0032] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A plastic case circuit breaker, comprising a circuit breaker (1) and a square frame (4), characterized in that: The front and rear sides of the circuit breaker (1) are respectively fixedly connected to the inner side of the square frame (4) at the top and bottom, the inner walls of the plurality of square frames (4) are respectively connected to the control structure (2), the inner walls of the plurality of control structures (2) are respectively connected to the pads (6), the upper parts of the front and rear sides of the circuit breaker (1) are respectively fixedly connected to the second straight plate (5), the lower parts of the front and rear sides of the circuit breaker (1) are respectively connected to the mounting structure (3), and the front and rear sides of the circuit breaker (1) are respectively processed with round openings.

2. The plastic case circuit breaker according to claim 1, characterized in that: The control structure (2) comprises a block (201) and a screw (202); the outer wall of the block (201) fits with the inner wall of the square frame (4); the inner wall of the block (201) is threadedly connected to the outer wall of the screw (202); a handle (203) is fixedly connected to the outer side of the screw (202); a vertical plate (204) is fixedly connected to the outer wall of the block (201); and a bracket (205) is fixedly connected to the outer side of the vertical plate (204).

3. The plastic case circuit breaker according to claim 2, characterized in that: The outer wall of the vertical plate (204) is plugged into the outer wall notch of the square frame (4).

4. The plastic case circuit breaker according to claim 2, characterized in that: The inner side of the outer wall of the screw rod (202) is plugged into the circular opening of the outer wall of the circuit breaker (1).

5. The plastic case circuit breaker according to claim 2, characterized in that: The inner wall of the bracket (205) is fixedly connected to the right side of the protective pad (6).

6. The plastic case circuit breaker according to claim 1, characterized in that: The mounting structure (3) comprises a first straight plate (301) and a slide groove (302), the inner sides of the two first straight plates (301) are respectively fixedly connected to the lower sides of the front and rear sides of the circuit breaker (1), the inner wall of the first straight plate (301) is processed with a slide groove (302), the inner wall of the slide groove (302) is slidably engaged with a straight cylinder (303), and the inner diameter of the straight cylinder (303) is consistent with the inner wall diameter of the second straight plate (5).

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