Fuse device with high safety

Abstract

The utility model relates to the technical field of fuses, and provides a fuse device with high safety, which comprises an insulating shell, a connecting groove is arranged in the middle of the bottom surface of the inner side of the insulating shell, a moving groove is arranged in the middle of the bottom surface of the inner side of the connecting groove, an insulating cover plate is movably inserted in the inner side of the insulating shell, and an insulating plate is fixed in the middle of the bottom surface of the insulating cover plate. The insulating plate is arranged on the inner side of the insulating shell, a fixing groove is formed in the upper end of the insulating plate, a fusing core is movably inserted into the inner side of the fixing groove, a spring is fixed in the middle of the bottom surface of the insulating plate, and the spring is arranged on the inner side of the connecting groove. When the fuse core is replaced, most of the insulating plate is moved out of the insulating shell and is thoroughly disconnected with an internal circuit, so that the risk of electric shock caused by misoperation of a worker can be avoided when the fuse core is replaced, the safety is improved, the replacement process is simple and rapid, and the efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a fuse device with high safety. Background Art

[0002] A fuse is an electrical device that generates heat to melt its fuse element, disconnecting the circuit when the current exceeds a specified value. Fuses are current protectors that operate on the principle that, after a period of current exceeding a specified value, the heat generated by the fuse element melts, thereby disconnecting the circuit. Fuses are widely used in high and low voltage power distribution and control systems, as well as in electrical equipment. As short-circuit and overcurrent protectors, they are one of the most commonly used protective devices.

[0003] During use, the outer shell structure of the existing fuse core is inconvenient to disassemble, which makes it difficult to replace the fuse core after it blows. In addition, since the fuse core is directly connected to the circuit without additional protection mechanism, if the staff mistakenly connects the circuit during replacement, it will cause safety risks or even endanger lives.

[0004] Therefore, a high-safety fuse device is needed to ensure safety when replacing the fuse core, and the replacement operation is convenient and quick. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes a high-safety fuse device, which has the characteristics of high safety and easy operation.

[0006] In order to achieve the above objectives, the present invention proposes the following specific solutions:

[0007] A high-safety fuse device comprises an insulating shell, a connecting groove is provided in the middle of the inner bottom surface of the insulating shell, a movable groove is provided in the middle of the inner bottom surface of the connecting groove, an insulating cover is movably inserted into the inner side of the insulating shell, an insulating plate is fixed in the middle of the bottom surface of the insulating cover, the insulating plate is located inside the insulating shell, a fixing groove is provided at the upper end of the insulating plate, a fuse core is movably inserted into the inner side of the fixing groove, a spring is fixed in the middle of the bottom surface of the insulating plate, the spring is located inside the connecting groove, the lower end of the spring is fixed to the inner bottom surface of the connecting groove, a movable plate is fixed in the middle of the bottom surface of the insulating plate, and the movable plate The upper end is located on the inner side of the spring, the movable plate passes through the movable groove, the lower end of the movable plate is provided with a rotation groove, the inner wall of the rotation groove is symmetrically provided with a rotation hole, the inner side of the rotation hole is movably plugged with a flip plate, one end of the flip plate is movably connected to the inner side of the rotation groove, the side wall of the insulating shell is symmetrically fixed with a guide plate, the guide plate passes through the side wall of the insulating shell, one end of the guide plate is fixed with a contact piece, the contact piece is located on the inner side of the insulating shell, the contact piece is fitted with the end of the fuse core, the other end of the guide plate is fixed with a wiring board, the wiring board is located on the outside of the insulating shell, and one end of the wiring board is provided with a wiring hole.

[0008] As an optimal technical solution for a high-safety fuse device of the present invention, a receiving groove is provided on the inner wall of the fixing groove, and a threaded hole is provided in the middle of the top surface of the insulating cover plate, and the threaded hole is connected to the receiving groove.

[0009] As an optimal technical solution for a high-safety fuse device of the present invention, a screw is threadedly connected to the inner side of the threaded hole, an insulating pad is fixed to the lower end of the screw, and the insulating pad is movably inserted into the inner side of the receiving groove.

[0010] As an optimal technical solution for a high-safety fuse device of the utility model, the inner wall of the connecting groove is symmetrically provided with limit grooves, and the bottom surface of the insulating plate is symmetrically fixed with L-shaped plates, the L-shaped plates are located on both sides of the spring, and one end of the L-shaped plate is movably inserted into the inner side of the limit groove.

[0011] As an optimal technical solution for a high-safety fuse device of the present invention, a rotating shaft is fixedly inserted into one end of the flip plate, the rotating shaft passes through the flip plate, and the end of the rotating shaft is movably inserted into the inner side of the rotating hole.

[0012] As a preferred technical solution for a fuse device with high safety of the present invention, a buckle is fixed to the edge of the bottom surface of the insulating shell, and the buckle is movably engaged with the other end of the flip plate.

[0013] As an optimal technical solution for a high-safety fuse device of the present invention, a mounting plate is symmetrically fixed to the outer wall of the insulating shell, the mounting plate is located on one side of the wiring board, and one side wall of the mounting plate is symmetrically provided with mounting holes.

[0014] As an optimal technical solution for a fuse device with high safety of the present invention, the buckle is made of elastic material, and the contact piece is made of elastic metal material.

[0015] Compared with the existing technology, the utility model has the following beneficial effects:

[0016] The fuse core of the utility model is fixed on the inner side of the fixing groove on the insulating plate mountain, the insulating pad presses and fixes the fuse core tightly, and the end of the fuse core contacts the resistance piece to connect the circuit. When the fuse core blows due to overload and needs to be replaced, the flip plate is flipped so that the flip plate and the movable plate are in a straight line. Under the elastic force of the spring, most of the insulating plate is pushed out of the inner side of the insulating shell, and the fuse core moves out of the inner side of the insulating shell and is completely disconnected from the internal circuit. At this time, it is only necessary to replace the new fuse core and insert it into the inner side of the fixing groove, and then press the insulating cover plate or pull the flip plate to move the fuse core into the inner side of the insulating shell and contact the resistance piece, and then flip the flip plate so that one end of the flip plate is clamped by the buckle to complete the replacement. The utility model is convenient and quick to replace the fuse core, and even if other staff members make a mistake in operating the circuit during replacement, the safety of the replacement personnel will not be endangered, and the safety is excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to better describe the technical solution of the present invention in detail, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a three-dimensional diagram of the overall structure provided by the utility model;

[0019] Figure 2 It is a three-dimensional cross-sectional view of the utility model;

[0020] Figure 3 A three-dimensional diagram of the movable plate of the present invention;

[0021] Figure 4 For this utility model Figure 1 A magnified schematic diagram of point A in the middle;

[0022] Figure 5 For this utility model Figure 2 Enlarged schematic diagram of point B in the middle

[0023] Figure 6 For this utility model Figure 2 Enlarged schematic diagram of point C in the middle.

[0024] In the figure: 1. Insulating shell; 11. Mounting plate; 111. Mounting hole; 12. Connecting groove; 121. Limiting groove; 122. Moving groove; 13. Buckle; 2. Insulating cover; 21. Insulating plate; 211. Fixing groove; 212. Storage groove; 22. Spring; 23. L-shaped plate; 24. Moving plate; 241. Rotating groove; 242. Rotating hole; 25. Flip plate; 251. Rotating shaft; 26. Threaded hole; 27. Screw; 271. Insulating pad; 3. Guide plate; 31. Terminal block; 311. Terminal hole; 32. Contact piece; 4. Fuse core. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0026] See also Figure 1-6 As shown, the utility model provides the following technical solutions: a high-safety fuse device includes an insulating shell 1, a mounting plate 11 is symmetrically fixed to the outer wall of the insulating shell 1, the mounting plate 11 is located on one side of the terminal board 31, and a side wall of the mounting plate 11 is symmetrically provided with mounting holes 111. The insulating shell 1 can be fixed through the mounting holes 111 on the mounting plate 11 to maintain stability during use.

[0027] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6As shown, specifically, a connecting groove 12 is provided in the middle of the inner bottom surface of the insulating shell 1 for connecting structures such as a spring 22, and a movable groove 122 is provided in the middle of the inner bottom surface of the connecting groove 12 to facilitate the connection and movement of the movable plate 24. An insulating cover plate 2 is movably inserted into the inner side of the insulating shell 1 for closing the insulating shell 1. An insulating plate 21 is fixed in the middle of the bottom surface of the insulating cover plate 2 for supporting the fuse core 4. The insulating plate 21 is located inside the insulating shell 1. A fixing groove 211 is provided on the upper end of the insulating plate 21. The fixing groove 211 is used to fix the fuse core 4 to prevent it from moving. The fuse core 4 will melt when the current exceeds the specified value. A spring 22 is fixed to the middle of the bottom surface of the insulating plate 21. The spring 22 can push most of the insulating plate 21 out of the inner side of the insulating shell 1 when the fuse core 4 is replaced. The spring 22 is located on the inner side of the connecting groove 12. The lower end of the spring 22 is fixed to the inner bottom surface of the connecting groove 12. A movable plate 24 is fixed to the middle of the bottom surface of the insulating plate 21 for pulling the insulating plate 21. The upper end of the movable plate 24 is located on the inner side of the spring 22. The movable plate 24 passes through the movable groove 122. The lower end of the movable plate 24 is provided with a rotating groove 241 for facilitating the flipping of the plate 25. Flip, the inner wall of the rotating groove 241 is symmetrically provided with a rotating hole 242, the rotating shaft 251 can rotate inside the rotating hole 242, the rotating hole 242 is movably plugged with a flip plate 25, the flip plate 25 is stuck by the buckle 13, and can limit the movement of the insulating plate 21, one end of the flip plate 25 is movably connected to the inside of the rotating groove 241, and one end of the flip plate 25 is fixedly plugged with a rotating shaft 251, so that the flip plate 25 can rotate inside the rotating groove 241, the rotating shaft 251 passes through the flip plate 25, and the end of the rotating shaft 251 is movably plugged into the inside of the rotating hole 242, the bottom edge of the insulating shell 1 A buckle 13 is fixed, and the buckle 13 is made of elastic material and is used to limit the rotation of the flip plate 25. The buckle 13 is movably engaged with the other end of the flip plate 25. The inner wall of the connecting groove 12 is symmetrically provided with a limit groove 121, which can prevent the spring 22 from completely pushing the insulating plate 21 out of the inner side of the insulating shell 1. The bottom surface of the insulating plate 21 is symmetrically fixed with an L-shaped plate 23, which is located on both sides of the spring 22. One end of the L-shaped plate 23 is movably plugged into the inner side of the limit groove 121 to prevent excessive displacement of the insulating plate 21. This solution is more convenient to replace the fuse core 4, and the entire replacement process is highly safe, taking into account both efficiency and safety.

[0028] Reference Figure 1 and Figure 2As shown, specifically, the side wall of the insulating shell 1 is symmetrically fixed with a guide plate 3 for transmitting current. The guide plate 3 passes through the side wall of the insulating shell 1, and a contact piece 32 is fixed at one end of the guide plate 3. The contact piece 32 is made of elastic metal material, which can ensure that the contact piece 32 is in contact with the fuse core 4 to connect the circuit. The contact piece 32 is located on the inner side of the insulating shell 1, and the contact piece 32 is fitted with the end of the fuse core 4. A terminal block 31 is fixed at the other end of the guide plate 3 for connecting to an external circuit. The terminal block 31 is located on the outside of the insulating shell 1, and a wiring hole 311 is provided at one end of the terminal block 31, which facilitates the connection and fixation of the circuit. The way of connecting this scheme to the external circuit is simple and convenient, which facilitates the installation and use of the fuse.

[0029] Reference Figure 1 、 Figure 2 and Figure 5 As shown, specifically, a receiving groove 212 is provided on the inner wall of the fixing groove 211 for receiving an insulating pad 271. A threaded hole 26 is provided in the middle of the top surface of the insulating cover plate 2. The screw 27 can rotate and move inside the threaded hole 26. The threaded hole 26 is connected to the receiving groove 212. The inner side of the threaded hole 26 is threadedly connected with a screw 27 for driving the insulating pad 271 to move. An insulating pad 271 is fixed to the lower end of the screw 27. The insulating pad 271 can support the fuse core 4 to prevent it from moving. The insulating pad 271 is movably inserted into the inner side of the receiving groove 212. This solution firmly fixes the fuse core 4 and can prevent it from moving during use, and has good stability.

[0030] The working principle and use process of this utility model:

[0031] When in use, the insulating shell 1 is fixed in a suitable position through the mounting holes 111 on the mounting plate 11 (screws can be used for fixing), and then the wiring boards 31 and wiring holes 311 on both sides of the insulating shell 1 are connected to the external circuit. When the current of the fuse core 4 exceeds the specified value, the fuse core 4 is fused. When replacing the fuse core 4, first push the buckle 13 to one side to deform the buckle 13, flip the flip plate 25, and make the flip plate 25 and the movable plate 24 in a straight line. Under the elastic force of the spring 22, the insulating plate 21 is pushed out of the inner side of the insulating shell 1, and the fuse core 4 is moved accordingly. After the fuse core 4 is removed from the inner side of the fixing groove 211, a new fuse core 4 is replaced and inserted into the inner side of the fixing groove 211. Then, the screw 27 is turned to make the insulating pad 271 support the fuse core 4. Then, the insulating plate 21 can be moved into the inner side of the insulating shell 1 by pressing the insulating cover plate 2 or pulling the flip plate 25. The end of the fuse core 4 contacts the resistance piece 32 to connect the circuit. Finally, the flip plate 25 is flipped over. One end of the flip plate 25 is stuck by the buckle 13 to complete the replacement operation.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high-safety fuse device, comprising an insulating shell (1), characterized in that: A connecting groove (12) is provided in the middle of the inner bottom surface of the insulating shell (1), and a movable groove (122) is provided in the middle of the inner bottom surface of the connecting groove (12). An insulating cover plate (2) is movably inserted into the inner side of the insulating shell (1), and an insulating plate (21) is fixed in the middle of the bottom surface of the insulating cover plate (2). The insulating plate (21) is located on the inner side of the insulating shell (1), and a fixing groove (211) is provided at the upper end of the insulating plate (21). A fuse core (4) is movably inserted into the inner side of the fixing groove (211). A spring (22) is fixed in the middle of the bottom surface of the insulating plate (21), and the spring (22) is located on the inner side of the connecting groove (12). The lower end of the spring (22) is fixed to the inner bottom surface of the connecting groove (12). A movable plate (24) is fixed in the middle of the bottom surface of the insulating plate (21), and the upper end of the movable plate (24) is located on the inner side of the spring (22). (24) passes through the movable groove (122), the lower end of the movable plate (24) is provided with a rotating groove (241), the inner wall of the rotating groove (241) is symmetrically provided with a rotating hole (242), the inner side of the rotating hole (242) is movably plugged with a flip plate (25), one end of the flip plate (25) is movably connected to the inner side of the rotating groove (241), the side wall of the insulating shell (1) is symmetrically fixed with a guide plate (3), the guide plate (3) passes through the side wall of the insulating shell (1), one end of the guide plate (3) is fixed with a contact piece (32), the contact piece (32) is located on the inner side of the insulating shell (1), the contact piece (32) is fitted with the end of the fuse core (4), the other end of the guide plate (3) is fixed with a wiring board (31), the wiring board (31) is located on the outer side of the insulating shell (1), and one end of the wiring board (31) is provided with a wiring hole (311).

2. A high-safety fuse device according to claim 1, characterized in that: A receiving groove (212) is provided on the inner wall of the fixing groove (211), and a threaded hole (26) is provided in the middle of the top surface of the insulating cover plate (2), wherein the threaded hole (26) is connected to the receiving groove (212).

3. A high-safety fuse device according to claim 2, characterized in that: The inner side of the threaded hole (26) is threadedly connected to a screw rod (27), the lower end of the screw rod (27) is fixed with an insulating pad (271), and the insulating pad (271) is movably plugged into the inner side of the receiving groove (212).

4. A high-safety fuse device according to claim 3, characterized in that: The inner wall of the connecting groove (12) is symmetrically provided with a limiting groove (121), and an L-shaped plate (23) is symmetrically fixed to the bottom surface of the insulating plate (21). The L-shaped plate (23) is located on both sides of the spring (22), and one end of the L-shaped plate (23) is movably inserted into the inner side of the limiting groove (121).

5. The high-safety fuse device according to claim 4, characterized in that: A rotating shaft (251) is fixedly inserted at one end of the flip plate (25), the rotating shaft (251) passes through the flip plate (25), and the end of the rotating shaft (251) is movably inserted into the inner side of the rotating hole (242).

6. A high-safety fuse device according to claim 5, characterized in that: A buckle (13) is fixed to the bottom edge of the insulating shell (1), and the buckle (13) is movably engaged with the other end of the flip plate (25).

7. A high-safety fuse device according to claim 6, characterized in that: A mounting plate (11) is symmetrically fixed to the outer wall of the insulating shell (1), the mounting plate (11) is located on one side of the wiring board (31), and mounting holes (111) are symmetrically provided on one side wall of the mounting plate (11).

8. The high-safety fuse device according to claim 7, characterized in that: The buckle (13) is made of an elastic material, and the resisting piece (32) is made of an elastic metal material.

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