Automatic reset type high-sensitivity over-current protector

Abstract

The utility model relates to the field of over-current protectors, and discloses an automatic reset type high-sensitivity over-current protector which comprises a machine body and two fixing frames, a display is fixedly installed on the surface of the machine body, the upper end and the lower end of the machine body are fixedly connected with connecting wires, and limiting blocks and sealing films are fixedly installed on the inner walls of the fixing frames. A piston is slidably connected to the inner wall of the fixing frame, the size specification of the surface of the piston is in interference fit with the size specification of the inner wall of the fixing frame, and a sliding frame is fixedly mounted at one end of the piston; the fixing frame is installed on the surface of the machine body, the limiting block and the sealing film which are made of rubber materials are installed on the inner wall of the fixing frame, the piston is slidably installed on the inner wall of the fixing frame, and the sliding frame is fixedly connected to one end of the piston, so that the piston is controlled by means of the sliding frame to push air in the fixing frame to the sealing film; therefore, the sealing film and the limiting block are kept in contact with the surface of the connecting line, and external moisture is prevented from entering the connecting position of the machine body and the connecting line.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of overcurrent protectors, particularly to an automatic reset high-sensitivity overcurrent protector. BACKGROUND

[0002] The automatic reset high-sensitivity overcurrent protector is an overcurrent protection device that can automatically reset and has high sensitivity. It can quickly cut off the circuit when detecting abnormal current, protect electrical equipment from damage, and automatically restore the working state after troubleshooting. The working principle of this protector is based on bimetallic strip or PTC thermistor technology. When the current exceeds the set value, the bimetallic strip will deform due to heating, triggering the switch to disconnect the circuit. The PTC thermistor will have a sudden change in resistance due to increased current, limiting the current and automatically restoring the low resistance state after heat dissipation. Both technologies achieve the functions of automatic reset and high sensitivity. The conventional automatic reset high-sensitivity overcurrent protector is used by installing the body in the appropriate position. Both ends of the body are equipped with connecting wires to connect the body to the circuit for protection. The body is equipped with a display to show the working state of the body.

[0003] According to the related technology in the above, the inventor believes that there is often a gap between the connection position of the conventional overcurrent protector and the connecting wire, which leads to short circuit of the connecting wire due to water flow caused by moisture when the overcurrent protector is installed in a location with heavy moisture, resulting in failure of the overcurrent protector.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it can include prior art known to those skilled in the art. CONTENT OF THE INVENTION

[0005] In order to solve the problem that the connection position of the conventional overcurrent protector and the connecting wire is easily eroded by water flow, the present application provides an automatic reset high-sensitivity overcurrent protector.

[0006] The automatic reset high-sensitivity overcurrent protector provided by the present application adopts the following technical solution:

[0007] The utility model provides an automatic reset type high -sensitive overcurrent protector, including body and two fixed frame, the surface fixed mounting of body has display, and the upper and lower both ends of body are all fixedly connected with connecting wire, the inner wall fixed mounting of fixed frame has limit stopper and sealing membrane, and the inner wall slidingly connected of fixed frame has the piston, the size specification of piston surface and the size specification of fixed frame inner wall interference fit, and one end of piston is fixedly installed with sliding frame, the bottom of fixed frame is fixedly installed with the surface of body, two fixed frame is symmetrical distribution with body as the axle, limit stopper and sealing membrane all are rubber material, and limit stopper and sealing membrane all are with connecting wire surface swing joint.

[0008] Preferably, the surface of the fixed frame is communicated with an air inlet valve, and the surface of the air inlet valve is threadedly connected with a cover.

[0009] Preferably, the surface of the sliding frame is fixedly connected with a control frame, the surface of the control frame is slidingly installed with the inner wall of the fixed frame, and two springs are fixedly connected between the piston and the fixed frame, and the two springs are symmetrically distributed about the fixed frame.

[0010] Preferably, the surface of the body is rotatably installed with a plurality of shielding frames, one end of the shielding frame is fixedly connected with a clamping block, and the surface of the clamping block is clamped with the surface of the body.

[0011] Preferably, the surface of the shielding frame is fixedly installed with a sealing ring, the sealing ring is a rubber ring, and the surface of the sealing ring is movably connected with the surface of the body.

[0012] In summary, the present application has the following beneficial technical effects:

[0013] By installing the fixed frame on the surface of the body, the inner wall of the fixed frame is installed with a limit stopper and a sealing membrane made of rubber, and the inner wall of the fixed frame is slidingly installed with a piston, one end of the piston is fixedly connected with a sliding frame, so as to push the air in the fixed frame to the sealing membrane by means of the sliding frame, thereby keeping the sealing membrane and the limit stopper in contact with the surface of the connecting wire, avoiding the moisture from the outside into the connection position of the body and the connecting wire. One end of the sliding frame is installed with a control frame, and springs are installed between the fixed frame and the piston, so as to push one end of the piston by means of the springs, thereby ensuring that the sealing membrane at one end of the fixed frame is in close contact with the surface of the connecting wire. By pulling the control frame, the sliding frame can be controlled to move, which facilitates the limiting of the connecting wire by means of the sealing membrane. The surface of the fixed frame is installed with an air inlet valve, and the surface of the air inlet valve is threadedly connected with a cover, so as to inject air into the fixed frame by means of the air inlet valve, thereby ensuring that the airflow in the fixed frame can support the sealing membrane. Compared with the prior art, the waterproofness of the overcurrent protector is effectively ensured.

[0014] The shielding frame is installed on the surface of the machine body, one end of the shielding frame is provided with a clamping block, the surface of the clamping block is clamped with the surface of the machine body, so that the position of the bolt on the surface of the machine body is shielded by the shielding frame, the corrosion and rust of the bolt by water vapor are avoided, the surface of the shielding frame is provided with a sealing ring made of rubber, one end of the sealing ring is in contact with the surface of the machine body, so that the shielding effect of the shielding frame on the bolt is improved by the good water-proof effect of the rubber material of the sealing ring; and the use effect of the device is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a whole structure schematic diagram of an automatic reset type high-sensitivity overcurrent protector according to an embodiment of the application;

[0016] Figure 2 is a fixed frame structure schematic diagram of the application embodiment;

[0017] Figure 3 is a side view structure schematic diagram of the application embodiment;

[0018] Figure 4 is a structure schematic diagram of A of the application embodiment.

[0019] Reference signs: 1, machine body; 2, display; 3, connecting line; 4, fixed frame; 5, limiting block; 6, sealing film; 7, piston; 8, sliding frame; 9, control frame; 10, spring; 11, gas filling valve; 12, shielding cap; 13, shielding frame; 14, clamping block; 15, sealing ring. DETAILED DESCRIPTION

[0020] The application will be further described in detail below with reference to the accompanying drawings. Figure 1

[0021] The application discloses an automatic reset type high-sensitivity overcurrent protector, which refers to Figure 1 Figure 2 , comprising an overcurrent protector machine body 1, in use, after the machine body 1 is installed at a suitable position, the upper and lower ends of the machine body 1 are both provided with connecting lines 3, the machine body 1 is connected with a circuit by means of the connecting lines 3, the circuit is protected by the machine body 1, and the surface of the machine body 1 is provided with a display 2, the working state of the machine body 1 is displayed by means of the display 2, a fixed frame 4 is installed on the surface of the machine body 1, the inner wall of the fixed frame 4 is provided with limiting blocks 5 and a sealing film 6 made of rubber, and the inner wall of the fixed frame 4 is slidingly provided with a piston 7, one end of the piston 7 is fixedly connected with a sliding frame 8, the piston 7 is controlled by means of the sliding frame 8 to push the air in the fixed frame 4 to the sealing film 6, so that the sealing film 6 and the limiting blocks 5 are kept in contact with the surface of the connecting lines 3, the waterproof property of the overcurrent protector is effectively ensured, and the moisture from the outside is prevented from entering the connection position of the machine body 1 and the connecting lines 3.

[0022] Reference​​Figure 2 One end of the sliding frame 8 is provided with a control frame 9, a spring 10 is installed between the fixed frame 4 and the piston 7, the piston 7 is pushed at one end by the spring 10, so that the sealing film 6 at one end of the fixed frame 4 is attached to the surface of the connecting line 3, and the sliding frame 8 can be moved by pulling the control frame 9, which facilitates the limiting of the connecting line 3 by the sealing film 6. The surface of the fixed frame 4 is provided with an air inlet valve 11, and the surface of the air inlet valve 11 is threadedly connected with a shielding cap 12. Air is injected into the fixed frame 4 by the air inlet valve 11 to ensure that the airflow in the fixed frame 4 can support the sealing film 6.

[0023] Referring to Figure 3 - Figure 4 The surface of the body 1 is provided with a shielding frame 13, one end of the shielding frame 13 is provided with a clamping block 14, the surface of the clamping block 14 is clamped with the surface of the body 1, the shielding frame 13 shields the bolt position on the surface of the body 1, avoiding the corrosion and rust of the bolt due to water vapor, and the surface of the shielding frame 13 is provided with a sealing ring 15 made of rubber material, one end of the sealing ring 15 is in contact with the surface of the body 1, and the shielding effect of the shielding frame 13 on the bolt is improved by the good water-proof effect of the rubber material.

[0024] The implementation principle of the automatic reset type high-sensitivity overcurrent protector is as follows: the fixed frame 4 is installed on the surface of the body 1, the inner wall of the fixed frame 4 is provided with a limiting block 5 and a sealing film 6 made of rubber material, and the inner wall of the fixed frame 4 is slidably provided with a piston 7, one end of the piston 7 is fixedly connected with a sliding frame 8, so as to push the air in the fixed frame 4 to the sealing film 6 by the sliding frame 8, so as to keep the sealing film 6 and the limiting block 5 in contact with the surface of the connecting line 3, avoiding the moisture from the outside into the connecting position of the body 1 and the connecting line 3, one end of the sliding frame 8 is provided with a control frame 9, a spring 10 is installed between the fixed frame 4 and the piston 7, the piston 7 is pushed at one end by the spring 10, so that the sealing film 6 at one end of the fixed frame 4 is attached to the surface of the connecting line 3, and the sliding frame 8 can be moved by pulling the control frame 9, which facilitates the limiting of the connecting line 3 by the sealing film 6. The surface of the fixed frame 4 is provided with an air inlet valve 11, and the surface of the air inlet valve 11 is threadedly connected with a shielding cap 12. Air is injected into the fixed frame 4 by the air inlet valve 11 to ensure that the airflow in the fixed frame 4 can support the sealing film 6.

[0025] The shielding frame 13 is arranged on the surface of the machine body 1, one end of the shielding frame 13 is provided with a clamping block 14, the surface of the clamping block 14 is clamped with the surface of the machine body 1, so as to shield the bolt position of the surface of the machine body 1 by the shielding frame 13, avoiding the bolt from being corroded by water vapor and rusting, the surface of the shielding frame 13 is provided with a sealing ring 15 made of rubber, one end of the sealing ring 15 is in contact with the surface of the machine body 1, so as to improve the shielding effect of the shielding frame 13 on the bolt by the good water-proof effect of the rubber material of the sealing ring 15.

[0026] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An automatic reset type high sensitivity overcurrent protector comprising a body (1) and two fixed frames (4), characterized in that: The surface of the body (1) is fixedly installed with a display (2), and the upper and lower ends of the body (1) are fixedly connected with connecting lines (3), the inner wall of the fixed frame (4) is fixedly installed with a limiting block (5) and a sealing film (6), and the inner wall of the fixed frame (4) is slidingly connected with a piston (7), the size specification of the surface of the piston (7) is in interference fit with the size specification of the inner wall of the fixed frame (4), and one end of the piston (7) is fixedly installed with a sliding frame (8).

2. The automatic reset type high-sensitivity overcurrent protector according to claim 1, characterized in that: The bottom end of the fixed frame (4) is fixedly installed with the surface of the body (1), the two fixed frames (4) are symmetrically distributed about the body (1), the limiting block (5) and the sealing film (6) are both made of rubber material, and the limiting block (5) and the sealing film (6) are both movably connected with the surface of the connecting line (3).

3. The automatic reset type high-sensitivity overcurrent protector according to claim 1, characterized in that: The surface of the fixed frame (4) is communicated with a gas filling valve (11), and the surface of the gas filling valve (11) is threadedly installed with a shielding cap (12), the center of the shielding cap (12) is on the same straight line with the center of the gas filling valve (11).

4. The automatic reset type high-sensitivity overcurrent protector according to claim 1, characterized in that: The surface of the sliding frame (8) is fixedly connected with a control frame (9), the surface of the control frame (9) is slidingly installed with the inner wall of the fixed frame (4), and the piston (7) and the fixed frame (4) are fixedly connected with two springs (10), and the two springs (10) are symmetrically distributed about the fixed frame (4).

5. The automatic reset type high-sensitivity overcurrent protector according to claim 1, characterized in that: The surface of the body (1) is rotatably installed with a plurality of shielding frames (13), one end of the shielding frame (13) is fixedly connected with a clamping block (14), and the surface of the clamping block (14) is clamped with the surface of the body (1).

6. An automatic reset type high sensitivity overcurrent protector according to claim 5, characterized in that: The surface of the shielding frame (13) is fixedly installed with a sealing ring (15), the sealing ring (15) is a rubber ring, and the surface of the sealing ring (15) is movably connected with the surface of the body (1).

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