CN212010853U

CN212010853U - Self-recovery fuse

Info

Publication number: CN212010853U
Application number: CN202020842908.8U
Authority: CN
Inventors: 杨晨
Original assignee: Shanghai Charles Electronic Co ltd
Current assignee: Shanghai Charles Electronic Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-11-24
Anticipated expiration: 2030-05-15

Abstract

The utility model discloses a self-resuming fuse, comprises a box bod, be provided with the bimetallic strip in the box body respectively, the conducting strip of support and Z shape, the bottom sprag of conducting strip is on the support, the top of conducting strip and the bottom overlap joint of bimetallic strip, the one end that the conducting strip was kept away from to the bimetallic strip is connected with first pole piece, the conducting strip is kept away from bimetallic strip one end and is connected with the second pole piece, first pole piece and second pole piece are all worn out from the box body, a plurality of stationary blades of fixedly connected with on the box body, a plurality of fixed columns of fixedly connected with on the stationary blade, the fixed column all is run through from top to bottom by the spliced eye with the stationary. Through inserting the jack post in the jack, can install the self-resuming fuse on the braid steadily, the problem that the fuse dropped can not appear.

Description

Self-recovery fuse

Technical Field

The utility model relates to a technical field of fuse particularly, relates to a self-resuming fuse.

Background

The braid is mainly applied to the electronic component mounting industry. The packaging tape is matched with a cover tape (an upper sealing tape) for use, electronic components such as resistors, capacitors, transistors, diodes and the like are loaded and contained in a pocket of a braid, and the cover tape is sealed above the braid to form a closed package for protecting the electronic components from being polluted and damaged in the transportation process. When the electronic components are mounted, the cover tape is peeled off, and the automatic mounting equipment sequentially takes out the components held in the pockets through the accurate positioning of the index holes of the tape and mounts the components on an integrated circuit board (PCB).

The self-recovery fuse element is connected in series in the circuit and is in a low-resistance state under normal conditions, so that the normal work of the circuit is ensured, when the circuit is short-circuited or abnormal large current is input, the impedance of the element is increased due to self-heating of the element, the current is limited to be small enough, and the overcurrent protection effect is realized. Meanwhile, when the temperature of the external environment rises suddenly, the over-temperature protection effect can be achieved after the environment reaches the switching temperature of the product.

The existing braid is only provided with a mounting groove, and the self-recovery fuse is placed in the mounting groove, so that the mounting and fuse placing modes are unstable, the self-recovery fuse is easily caused to jump out of the mounting groove, and the self-recovery fuse falls to the ground.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem among the correlation technique, the utility model provides a self-resuming fuse can install the self-resuming fuse on the braid steadily, the problem that the fuse dropped can not appear.

In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a self-resuming fuse, includes the box body, be provided with bimetallic strip, support and Z-shaped conducting strip in the box body respectively, the bottom support of conducting strip is in on the support, the top of conducting strip with the bottom overlap joint of bimetallic strip, the bimetallic strip is kept away from the one end of conducting strip is connected with first pole piece, the conducting strip is kept away from bimetallic strip one end is connected with the second pole piece, first pole piece with the second pole piece is all followed wear out in the box body, a plurality of stationary blades of fixedly connected with on the box body, a plurality of fixed columns of fixedly connected with on the stationary blade, the fixed column with the stationary blade is all run through from top to bottom by the spliced eye, the spliced eye is pegged graft with the spliced pole that sets up.

Furthermore, the bimetallic strip is formed by riveting a copper sheet and an iron sheet.

Furthermore, the copper sheet is made of manganese-nickel-copper alloy.

Furthermore, the top of the support is provided with a U-shaped groove corresponding to the conducting strip.

Furthermore, the braid is provided with an installation groove matched with the box body.

The utility model has the advantages that: the first pole piece, the bimetallic strip, the conducting strip and the second pole piece form a loop through the support of the support, when the current is too high, the bimetallic strip bends upwards due to overhigh temperature and is separated from the Z-shaped conducting strip, the circuit is protected from accidents due to overload, when the circuit is disconnected, the temperature of the bimetallic strip is reduced, the bimetallic strip restores to be in contact with the Z-shaped conducting strip, and the circuit is switched on; through inserting the jack post in the jack, can install the self-resuming fuse on the braid steadily, the problem that the fuse dropped can not appear.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front cross-sectional view of a self-restoring fuse according to an embodiment of the present invention;

fig. 2 is a top view of a self-restoring fuse according to an embodiment of the present invention.

In the figure:

1. a box body; 2. a first pole piece; 3. a second pole piece; 4. a bimetal; 5. a conductive sheet; 6. a support; 7. a fixing sheet; 8. and (5) fixing the column.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

As shown in fig. 1-2, a self-restoring fuse according to an embodiment of the present invention includes a case body 1, the box body 1 is internally provided with a bimetallic strip 4, a support 6 and a Z-shaped conducting strip 5 respectively, the bottom of the conducting strip 5 is supported on the support 6, the top of the conducting strip 5 is lapped with the bottom of the bimetallic strip 4, one end of the bimetallic strip 4 far away from the conducting strip 5 is connected with the first pole piece 2, one end of the conducting strip 5, which is far away from the bimetallic strip 4, is connected with a second pole piece 3, the first pole piece 2 and the second pole piece 3 both penetrate out of the box body 1, a plurality of fixing pieces 7 are fixedly connected on the box body 1, a plurality of fixing columns 8 are fixedly connected on the fixing pieces 7, the fixing column 8 and the fixing sheet 7 are vertically penetrated through by the insertion holes, and the insertion holes are in insertion fit with the insertion columns arranged on the braid.

In a specific embodiment of the present invention, the bimetallic strip 4 is riveted by a copper sheet and an iron sheet.

In a specific embodiment of the present invention, the copper sheet is made of manganese-nickel-copper alloy.

In an embodiment of the present invention, a U-shaped groove corresponding to the conductive strip 5 is formed at the top of the support 6.

In an embodiment of the present invention, the braid has a mounting groove formed thereon and engaged with the box body 1.

For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are explained in detail through specific use modes below.

Self-resuming fuse include box body 1, first pole piece 2, second pole piece 3, bimetallic strip 4, conducting strip 5, support 6, stationary blade 7 and fixed column 8. The box body 1 comprises a box body and a box cover, and the box body and the box cover can be connected through screws. The side wall of the box body is respectively penetrated by a first pole piece 2 and a second pole piece 3, the first pole piece 2 is connected with a bimetallic strip 4, and the second pole piece 3 is connected with a conducting strip 5. The first pole piece 2 is electrically connected with the second pole piece 3 through the bimetallic strip 4 and the conducting strip 5 which are overlapped with each other. The first pole piece 2 and the second pole piece 3 are located on the left side and the right side of the fuse body, and the first pole piece 2 and the second pole piece 3 are arranged symmetrically. U type groove has all been seted up on first pole piece 2 and on the second pole piece 3, so, can improve structural stability and reliability. The support 6 functions to support the conductive sheet 5. The box body 1 is made of polytetrafluoroethylene to achieve an insulating effect. In order to ensure the conductivity of the bimetallic strip 4 and to bend the bimetallic strip after being heated, the bimetallic strip 4 is made of manganese-nickel-copper alloy material.

Two fixing pieces 7 are fixed on the box body 1, two fixing columns 8 are arranged on one fixing piece 7, the fixing columns 8 and the fixing pieces 7 are all vertically penetrated through the insertion holes, and through the insertion holes, the fixing columns 8 can be in insertion connection with the insertion columns on the braid, so that the self-recovery fuse can be fixed on the braid.

The mounting groove has been seted up on the braid, and four grafting posts set up respectively on the braid, and four grafting posts are located the relative both sides border position department of mounting groove respectively, and the self-resuming fuse is placed in the mounting groove, and fixed column 8 on the box body 1 pegs graft on the grafting post through the spliced eye to can install the self-resuming fuse on the braid steadily, the problem that the fuse dropped can not appear.

When the fuse is used specifically, the fuse body is connected in series into a circuit through the first pole piece 2 and the second pole piece 3, and when the current is too large, the bimetallic strip 4 expands and bends due to the too large current to be separated from the conducting strip 5, so that the circuit is disconnected, the fuse fusing effect is achieved, and the circuit is protected; when the bimetal 4 cools down gradually, the original position is restored to be in contact with the conductive plate 5, so that the circuit is connected.

To sum up, with the help of the technical scheme of the utility model, the first pole piece, the bimetallic strip, the conducting strip and the second pole piece form a loop through the support of the support, when the current is too large, the bimetallic strip bends upwards due to too high temperature and is separated from the Z-shaped conducting strip, the protection circuit can not be in accident due to overload, when the circuit is disconnected, the temperature of the bimetallic strip is reduced, the bimetallic strip restores the original shape to be in contact with the Z-shaped conducting strip, and the circuit is switched on; through inserting the jack post in the jack, can install the self-resuming fuse on the braid steadily, the problem that the fuse dropped can not appear.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-recovery fuse comprises a box body (1) and is characterized in that a bimetallic strip (4), a support (6) and a Z-shaped conductive strip (5) are respectively arranged in the box body (1), the bottom of the conductive strip (5) is supported on the support (6), the top of the conductive strip (5) is lapped with the bottom of the bimetallic strip (4), one end, far away from the conductive strip (5), of the bimetallic strip (4) is connected with a first pole piece (2), one end, far away from the bimetallic strip (4), of the conductive strip (5) is connected with a second pole piece (3), the first pole piece (2) and the second pole piece (3) penetrate out of the box body (1), a plurality of fixing plates (7) are fixedly connected to the box body (1), a plurality of fixing columns (8) are fixedly connected to the fixing plates (7), and the fixing columns (8) and the fixing plates (7) are vertically penetrated through insertion holes, the insertion holes are in insertion fit with insertion columns arranged on the braid.

2. Self-restoring fuse according to claim 1, characterized in that the bimetallic strip (4) is riveted by copper and iron strips.

3. The self-healing fuse according to claim 2, wherein the copper sheet is made of manganese-nickel-copper alloy.

4. The self-healing fuse according to claim 1, characterized in that the top of the support (6) is provided with a U-shaped slot corresponding to the conducting strip (5).

5. The self-recovery fuse as claimed in claim 1, wherein the braid is provided with an installation groove matched with the box body (1).