Macromolecular patch fuse

Abstract

The utility model relates to a polymer patch fuse, which comprises an insulating shell, a mounting assembly is arranged in the insulating shell, when the bolt type fuse is used, a fuse 3 and a fuse 4 are not contacted with elastic arc sheets on two sides, a fuse 1 and a fuse 2 are contacted with the elastic arc sheets on two sides, and the fuse 3 and the fuse 4 are not contacted with the elastic arc sheets on two sides. Under the elastic force of the elastic arc sheet, the first fuse and the second fuse are pushed to be sleeved, so that the current can pass through the first fuse and the second fuse, the standby fuse is quickly switched without disassembling a machine or replacing the whole circuit board, the service life of equipment is prolonged, the maintenance cost is reduced, and only the elastic sheet in the clamping groove needs to be clamped; according to the utility model, rapid replacement can be realized, modularized plugging replacement is adopted, and the whole insulating shell assembly is directly replaced, so that the downtime of equipment is reduced, the maintenance difficulty and time cost are greatly reduced, the influence of high temperature during repeated welding and desoldering on a circuit board is avoided, and the overall durability of the equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to patch fuse technology field, concretely relates to a kind of high molecular patch fuse. BACKGROUND

[0002] High molecular patch fuse is a surface mount device, adopts high molecular material as core, with positive temperature coefficient characteristic, when current exceeds rated value, material rapidly heats and expands, resistance sharply increases, thereby cutting off circuit, plays the role of overcurrent protection, after troubleshooting, material cooling shrinks, resistance recovers, circuit automatically recovers normal, this fuse is small in size, responds fast, resettable, widely used in overcurrent protection of electronic equipment.

[0003] But the above-mentioned high molecular patch fuse in actual use process, long-term use or multiple overflows, material can be irreversibly changed, lead to resistance value increases, affect circuit normal work, possibly affect circuit performance, thus need to replace, when replacing, need to use hot air gun, welding platform or BGA repair platform to carry out disassembly and welding, operation is complex, so that ordinary user is difficult to operate by oneself, need to be handed over to professional maintenance personnel or factory processing;In view of this, we propose a kind of high molecular patch fuse. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of high molecular patch fuse, can replace fuse to improve the maintenance efficiency of fuse.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A kind of high molecular patch fuse, including insulating shell, the inside of the insulating shell is provided with installation component, the installation component includes:

[0007] Clamping slot, the clamping slot is opened in the side wall of insulating shell, the outer wall of the insulating shell is fixedly connected with limiting column, the inner wall of the insulating shell is fixedly connected with guide seat;

[0008] Elastic sheet, the side wall of the elastic sheet is equipped with guide slot, the guide slot is slidably connected with guide seat;

[0009] Connecting seat, the top of the connecting seat is fixedly connected with binding post, the binding post is electrically connected with connecting wire, the side wall of the connecting seat is equipped with sliding slot;

[0010] Metal wire, the metal wire is fixedly connected in the side wall of insulating shell, the end surface of the metal wire is fixedly connected with elastic arc piece, the side wall of the elastic arc piece is fixedly connected with insulating sheet;

[0011] The rubber block one is sleeved with a fuse one on the side wall, the rubber block one is sleeved with a fuse three on the side wall, the top end surface of the rubber block one is fixedly connected with a connecting rod, and the top end surface of the connecting rod is fixedly connected with a push piece.

[0012] The rubber block two is sleeved with a fuse two on the side wall, and the rubber block two is sleeved with a fuse four on the side wall.

[0013] The top end surface of the rubber block two is fixedly connected with a connecting rod, and the top end surface of the connecting rod is fixedly connected with a push piece.

[0014] The fuse one is movably connected with the insulating sheet, and the fuse two is movably connected with the insulating sheet.

[0015] The end surface of the elastic sheet is inserted with the connecting seat, the sliding groove is slidably connected with the limiting column, and then the insulating shell and the connecting seat are fixed.

[0016] The fuse three is movably connected with the elastic arc sheet, the fuse two is movably connected with the elastic arc sheet, and the fuse three is sleeved with the fuse four.

[0017] The metal wire is electrically connected with the connecting wire, and the metal wire is electrically connected with the elastic arc sheet, so that the current can pass through the fuse three and the fuse four.

[0018] The rubber block one is movably connected with the inner wall of the insulating shell, and the rubber block two is movably connected with the inner wall of the insulating shell.

[0019] The rubber block one is fixedly connected with the connecting sheet, the connecting sheet is fixedly connected with the rubber block two, the rubber block one and the rubber block two are connected through the connecting sheet, and the rubber block one and the rubber block two move synchronously.

[0020] The utility model discloses obtained technical effect is:

[0021] 1. The high polymer patch fuse, through the installation component that sets up, the contact of fuse three and fuse four cancels with both sides elastic arc sheet, fuse one and fuse two contact with both sides elastic arc sheet, and under the elasticity of elastic arc sheet, push the sleeve joint of fuse one and fuse two, so that the current can pass through fuse one and fuse two, and the standby fuse is switched quickly, and it is not necessary to disassemble or replace the whole circuit board, thereby prolonging the service life of equipment, reducing maintenance cost, only need to clamp the elastic sheet in the clamping groove, can realize quick replacement, adopt modular plug-in replacement, directly replace the whole insulating shell component, reduce equipment downtime, greatly reduce maintenance difficulty and time cost, avoid the influence of high temperature on the circuit board when welding, disassembling and welding many times, improve the overall durability of equipment.

[0022] 2. This polymer patch fuse, through the set connecting piece, enables rubber block one and rubber block two to move synchronously, ensuring that fuse one and fuse two can be accurately fitted together, guaranteeing a stable electrical connection between the fuses, avoiding poor contact caused by poor fit or positional deviation, thereby improving the reliability and stability of the circuit, reducing misoperation caused by improper operation or damage, and improving the safety of the circuit. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0024] Figure 2 This is an exploded view of the main body of this utility model;

[0025] Figure 3 This is a schematic diagram of the exploded structure of the insulating shell of this utility model;

[0026] Figure 4 This utility model Figure 3 Schematic diagram of the structure of region A in the middle;

[0027] Figure 5 This is a schematic diagram of the structure of the insulating block of this utility model;

[0028] Figure 6 This is an exploded view of the elastic sheet of this utility model.

[0029] In the diagram: 100, Insulating shell; 200, Mounting assembly; 210, Slot; 220, Elastic sheet; 211, Guide groove; 230, Limiting post; 240, Connecting seat; 241, Terminal post; 242, Connecting wire; 243, Slide groove; 250, Metal wire; 251, Elastic arc sheet; 252, Insulating sheet; 260, Rubber block one; 261, Fuse one; 262, Fuse three; 270, Connecting rod; 271, Paddle; 280, Rubber block two; 281, Fuse two; 282, Fuse four; 290, Guide seat; 300, Connecting piece. Detailed Implementation

[0030] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model. As used herein, the terms "parallel" and "perpendicular" are not limited to their strict geometric definitions, but include tolerances for reasonable and inconsistent machining or human errors.

[0031] Combination Figures 1 to 6 As shown below, the specific features of this polymer patch fuse are described in detail:

[0032] The utility model provides a polymer patch fuse, including the insulating shell 100, the inside of insulating shell 100 is provided with installation component 200, installation component 200 includes clamping slot 210, elastic sheet 220, guide slot 211, limiting post 230, connecting seat 240, wiring post 241, connecting wire 242, sliding slot 243, metal wire 250, elastic arc piece 251, insulating piece 252, rubber block one 260, fuse one 261, fuse three 262, connecting rod 270, push piece 271, rubber block two 280, fuse two 281, fuse four 282, guide seat 290.

[0033] In an embodiment of the utility model, the clamping slot 210 is opened in the side wall of the insulating shell 100, the outer wall of the insulating shell 100 is fixedly connected with the limiting post 230, the inner wall of the insulating shell 100 is fixedly connected with the guide seat 290, the side wall of the elastic sheet 220 is provided with the guide slot 211, the guide slot 211 is slidably connected with the guide seat 290, the top of the connecting seat 240 is fixedly connected with the wiring post 241, the wiring post 241 is electrically connected with the connecting wire 242, the side wall of the connecting seat 240 is provided with the sliding slot 243, the end surface of the elastic sheet 220 is inserted with the connecting seat 240, the sliding slot 243 is slidably connected with the limiting post 230, and the insulating shell 100 and the connecting seat 240 are fixed.

[0034] The metal wire 250 is fixedly connected with the side wall of the insulating shell 100, the end surface of the metal wire 250 is fixedly connected with the elastic arc piece 251, the side wall of the elastic arc piece 251 is fixedly connected with the insulating piece 252, the fuse one 261 is movably connected with the insulating piece 252, the fuse two 281 is movably connected with the insulating piece 252, the side wall of the rubber block one 260 is sleeved with the fuse one 261, the side wall of the rubber block one 260 is sleeved with the fuse three 262, the top end surface of the rubber block one 260 is fixedly connected with the connecting rod 270, and the top end surface of the connecting rod 270 is fixedly connected with the push piece 271.

[0035] The side wall of the rubber block two 280 is sleeved with the fuse two 281, the side wall of the rubber block two 280 is sleeved with the fuse four 282, the fuse three 262 is movably connected with the elastic arc piece 251, the fuse two 281 is movably connected with the elastic arc piece 251, the fuse three 262 is sleeved with the fuse four 282, the metal wire 250 is electrically connected with the connecting wire 242, the metal wire 250 is electrically connected with the elastic arc piece 251, so that the current can pass through the fuse three 262 and the fuse four 282, the top end surface of the rubber block two 280 is fixedly connected with the connecting rod 270, the top end surface of the connecting rod 270 is fixedly connected with the push piece 271, the rubber block one 260 is movably connected with the inner wall of the insulating shell 100, and the rubber block two 280 is movably connected with the inner wall of the insulating shell 100.

[0036] The elastic arc piece 251 is connected with the fuse three 262 and the fuse four 282 through elastic pushing, and then the device is welded on the PCB board, so that the current can pass through the fuse. When the current is overloaded or short-circuited, the internal polymer material causes the resistance to increase sharply due to heating, thereby limiting the current and protecting the circuit. After the fault is eliminated, the material cools down to restore the low resistance state. After a long time of use or multiple overcurrents, the material changes irreversibly. At this time, the fuse needs to be replaced. By sliding the push piece 271, the rubber block one 260 and the rubber block two 280 are moved, so that the fuse three 262 and the fuse four 282 cancel the contact with the two elastic arc pieces 251. The fuse one 261 and the fuse two 281 are in contact with the two elastic arc pieces 251, and under the elastic force of the elastic arc piece 251, the fuse one 261 and the fuse two 281 are connected in series. The current can pass through the fuse one 261 and the fuse two 281. The standby fuse is quickly switched without disassembling or replacing the entire circuit board, thereby prolonging the service life of the equipment and reducing the maintenance cost.

[0037] When both groups of fuses are aged, the elastic piece 220 in the clamping groove 210 is clamped by the tweezers, so that the elastic piece 220 is deformed towards the inside of the insulating shell 100. The two sides of the elastic piece 220 cancel the insertion with the connecting seat 240. At this time, the insulating shell 100 can be pulled out upward again. A new insulating shell 100 and its internal mounting assembly 200 are inserted between the connecting seat 240 to realize the replacement of the fuse. No welding or special tool is needed. Only the elastic piece 220 in the clamping groove 210 needs to be clamped to realize quick replacement. The modular plug-in replacement is adopted to directly replace the entire insulating shell 100 assembly, reduce the equipment downtime, greatly reduce the maintenance difficulty and time cost, avoid the influence of high temperature on the circuit board during multiple welding and disassembly, and improve the overall durability of the equipment.

[0038] In addition, the rubber block one 260 is fixedly connected with the connecting piece 300, the connecting piece 300 is fixedly connected with the rubber block two 280, the rubber block one 260 and the rubber block two 280 are connected through the connecting piece 300, so that the rubber block one 260 and the rubber block two 280 move synchronously, ensuring that the fuse one 261 and the fuse two 281 can be connected in series, ensuring the stable electrical connection between the fuses, avoiding poor contact caused by poor cooperation or position deviation, thereby improving the reliability and stability of the circuit, reducing the misoperation caused by improper operation or damage, and improving the safety of the circuit.

[0039] In the utility model, when using, through the slide of the slide piece 271, the rubber block one 260 and the rubber block two 280 are moved, fuse three 262 and fuse four 282 cancel the contact with the elastic arc piece 251 of both sides, and fuse one 261 and fuse two 281 contact with the elastic arc piece 251 of both sides, and under the elastic force of the elastic arc piece 251, the sleeve joint of fuse one 261 and fuse two 281 is pushed, so that the current can pass through fuse one 261 and fuse two 281, and the standby fuse is switched quickly, without disassembling or replacing the whole circuit board, the elastic sheet 220 in the clamping groove 210 is clamped by the tweezers, the elastic sheet 220 is deformed to the inside of the insulating shell 100, and the two sides of the elastic sheet 220 cancel the plug-in of the connecting seat 240, at this moment, the insulating shell 100 can be pulled out upward, and then the new insulating shell 100 and the mounting assembly 200 inside it are inserted between the connecting seat 240, the replacement of the fuse is realized, without welding or special tools, and the elastic sheet 220 in the clamping groove 210 can be clamped, so that the quick replacement is realized, the modular plug-in replacement is adopted, the whole insulating shell 100 assembly is directly replaced, the equipment downtime is reduced, and the maintenance difficulty and time cost are greatly reduced.

Claims

1. A polymer patch fuse comprising an insulating housing (100), characterized in that: The inside of the insulating shell (100) is provided with a mounting assembly (200), which comprises: A clamping groove (210) is arranged on the side wall of the insulating shell (100), the outer wall of the insulating shell (100) is fixedly connected with a limiting column (230), and the inner wall of the insulating shell (100) is fixedly connected with a guide seat (290); An elastic sheet (220) is arranged on the side wall of the insulating shell (100), and the side wall of the elastic sheet (220) is provided with a guide groove (211) in sliding connection with the guide seat (290); A connecting seat (240) is arranged on the side wall of the insulating shell (100), and the top of the connecting seat (240) is fixedly connected with a connecting column (241) in electrical connection with a connecting wire (242); A metal wire (250) is fixedly connected to the side wall of the insulating shell (100), and the end surface of the metal wire (250) is fixedly connected with an elastic arc sheet (251), and the side wall of the elastic arc sheet (251) is fixedly connected with an insulating sheet (252); A rubber block one (260) is arranged on the side wall of the insulating shell (100), and the side wall of the rubber block one (260) is sleeved with a fuse one (261) and a fuse three (262), and the top end surface of the rubber block one (260) is fixedly connected with a connecting rod (270), and the top end surface of the connecting rod (270) is fixedly connected with a pushing sheet (271); A rubber block two (280) is arranged on the side wall of the insulating shell (100), and the side wall of the rubber block two (280) is sleeved with a fuse two (281) and a fuse four (282).

2. The polymeric patch fuse of claim 1, wherein: The top end surface of the rubber block two (280) is fixedly connected with a connecting rod (270), and the top end surface of the connecting rod (270) is fixedly connected with a pushing sheet (271).

3. The polymeric patch fuse of claim 1, wherein: The fuse one (261) and the insulating sheet (252) are in movable connection, and the fuse two (281) and the insulating sheet (252) are in movable connection.

4. The polymeric patch fuse of claim 1, wherein: The end surface of the elastic sheet (220) is in insertion connection with the connecting seat (240), and the sliding groove (243) is in sliding connection with the limiting column (230).

5. The polymeric patch fuse of claim 1, wherein: The fuse three (262) and the elastic arc sheet (251) are in movable connection, the fuse two (281) and the elastic arc sheet (251) are in movable connection, and the fuse three (262) and the fuse four (282) are sleeved.

6. The polymeric patch fuse of claim 1, wherein: The metal wire (250) is in electrical connection with the connecting wire (242), and the metal wire (250) is in electrical connection with the elastic arc sheet (251).

7. The polymeric patch fuse of claim 1, wherein: The rubber block one (260) and the inner wall of the insulating shell (100) are in movable connection, and the rubber block two (280) and the inner wall of the insulating shell (100) are in movable connection.

8. The polymeric patch fuse of claim 1, wherein: The rubber block one (260) is fixedly connected with a connecting sheet (300), and the connecting sheet (300) is fixedly connected with the rubber block two (280).

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