CN216487519U

CN216487519U - Composite resistor

Info

Publication number: CN216487519U
Application number: CN202122766202.5U
Authority: CN
Inventors: 李燕君
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-05-10
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses a composite resistor which comprises a ceramic insulator, wherein conductive caps are fixed at the left end and the right end of the ceramic insulator respectively, a conductive ring body is clamped on the outer side wall of the middle part of the ceramic insulator, a fusing temperature safety layer is sprayed on the outer surface of the ceramic insulator between one conductive cap and the conductive ring body, the fusing temperature safety layer is contacted with the corresponding conductive cap and the conductive ring body, and a resistance wire is wound on the ceramic insulator between the conductive ring body and the other conductive cap; one end of the resistance wire is contacted with the corresponding conductive cap, the other end of the resistance wire is contacted with the conductive ring, and the middle parts of the outer wall surfaces of the conductive caps are fixed with connecting leads. The ceramic insulator is locally sprayed with the fusing temperature safety layer and the winding resistance wire by adopting a spraying process, the ceramic insulator is fast to process, high in efficiency and low in processing cost, and the fusing temperature safety layer and the winding resistance wire can be short-circuited when the fusing temperature safety layer and the winding resistance wire reach overcurrent, overvoltage and overtemperature, so that triple protection is realized, and the using effect is improved.

Description

Composite resistor

The technical field is as follows:

the utility model relates to the technical field of electrical components, in particular to a composite resistor.

The background art comprises the following steps:

the fuse resistor suitable for the existing electrical product mainly fuses the fuse wire in advance when an abnormal state such as overcurrent or overvoltage occurs, so as to cut off the current and achieve the protection circuit.

In the structure of the current temperature fuse, a section of fusible alloy wire is connected between two pins and is coated by special resin, when the temperature around the fuse rises to reach the action temperature of the fuse, the fusible alloy wire can be contracted and fused along the tail ends of the two pins in different directions so as to cut off the current and reach a protection circuit;

however, when the electric leakage of the electric appliance occurs in the general fuse resistor, the temperature fuse of the fuse resistor cannot be blown in advance, so that the safety is not ideal;

in addition, the conventional thermal fuse cannot be blown out quickly even under overcurrent or overvoltage, and can be blown out after a certain time, so that the safety is limited.

The utility model has the following contents:

the utility model aims to overcome the defects of the prior art and provides a composite resistor, wherein a fusing temperature safety layer and a winding resistance wire are locally sprayed on a ceramic insulator by adopting a spraying process, the composite resistor is quick to process, high in efficiency and low in processing cost, and the fusing temperature safety layer and the winding resistance wire can be short-circuited when the fusing temperature safety layer and the winding resistance wire reach overcurrent, overvoltage and overtemperature, so that triple protection is realized and the using effect is improved.

The scheme for solving the technical problems is as follows:

a composite resistor comprises a ceramic insulator, wherein conductive caps are fixed at the left end and the right end of the ceramic insulator, conductive ring bodies are clamped on the outer side wall of the middle part of the ceramic insulator, a fusing temperature safety layer is sprayed on the outer surface of the ceramic insulator between one conductive cap and the conductive ring bodies, the fusing temperature safety layer is in contact with the corresponding conductive cap and the corresponding conductive ring body, and a resistance wire is wound on the ceramic insulator between the conductive ring body and the other conductive cap;

one end of the resistance wire is contacted with the corresponding conductive cap, the other end of the resistance wire is contacted with the conductive ring, and the middle parts of the outer wall surfaces of the conductive caps are fixed with connecting leads.

Two ends of the ceramic insulator are clamped in the corresponding conductive caps, one end of the fusing temperature safety layer is clamped between the inner side wall of the corresponding conductive cap and the ceramic insulator, and the other end of the fusing temperature safety layer is clamped between the inner side wall of the conductive ring body and the outer side wall of the ceramic insulator.

The conductive cap is a metal conductive cover body.

The conductive ring body is a metal conductive ring body.

One end of the resistance wire is welded and fixed on the corresponding conductive cap cover, and the other end of the resistance wire is welded and fixed on the conductive ring body.

The fusing temperature safety layer is tin-based alloy.

The resistance wire is a safety resistance wire.

The utility model has the following outstanding effects:

compared with the prior art, the ceramic insulator is locally sprayed with the fusing temperature safety layer and the winding resistance wire by adopting a spraying process, the ceramic insulator is fast to process, high in efficiency and low in processing cost, and the fusing temperature safety layer and the winding resistance wire can be short-circuited when the fusing temperature safety layer and the winding resistance wire reach overcurrent, overvoltage and overtemperature, so that triple protection is realized, and the using effect is improved.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a partial cross-sectional view of the present invention.

The specific implementation mode is as follows:

the present invention will be described in detail below with reference to the accompanying drawings and specific preferred embodiments so that the advantages and features of the present invention can be more readily understood by those skilled in the art, and these embodiments are provided for illustrative purposes only and are not intended to limit the scope of the present invention.

In the embodiment, as shown in fig. 1 to 2, a composite resistor includes a ceramic insulator 1, conductive caps 3 are fixed at both left and right ends of the ceramic insulator 1, a conductive ring body 5 is clamped on an outer side wall of a middle portion of the ceramic insulator 1, a fusing temperature safety layer 2 is sprayed on an outer surface of the ceramic insulator 1 between one conductive cap 3 and the conductive ring body 5, the fusing temperature safety layer 2 is in contact with the corresponding conductive cap 3 and the conductive ring body 5, and a resistance wire 6 is wound on the ceramic insulator 1 between the conductive ring body 5 and the other conductive cap 3;

one end of the resistance wire 6 is contacted with the corresponding conductive cap 3, the other end is contacted with the conductive ring body 5, and the middle part of the outer wall surface of the conductive cap 3 is fixed with a connecting wire 4.

Furthermore, two ends of the ceramic insulator 1 are clamped in the corresponding conductive caps 3, one end of the fusing temperature safety layer 2 is clamped between the inner side wall of the corresponding conductive cap 3 and the ceramic insulator 1, and the other end of the fusing temperature safety layer 2 is clamped between the inner side wall of the conductive ring body 5 and the outer side wall of the ceramic insulator 1.

Further, the conductive cap 3 is a metal conductive cover.

Further, the conductive ring body 5 is a metal conductive ring body.

Furthermore, one end of the resistance wire 6 is welded and fixed on the corresponding conductive cap 3, and the other end is welded and fixed on the conductive ring body 5. The resistance wire (6) is a safety resistance wire and can be fused when overcurrent and overvoltage occur.

Furthermore, the fusing temperature safety layer 2 is a tin-based alloy.

The fusing temperature safety layer 2 and the resistance wire 6 have different melting points.

In this embodiment, the ceramic insulator 1 is a non-metal body, and has high mechanical strength, high temperature resistance, and good thermal expansion coefficient, and the fusing temperature safety layer 2 is a tin-based alloy film layer containing 90% to 98% of tin and containing the rest of metal components such as nickel, indium, bismuth, silver, or copper, and achieves a fusing effect by utilizing the low melting point of tin and achieving a lower melting point with the assistance of other metals.

This embodiment is when using, it is different because fusing temperature insurance layer 2 and resistance wire 6's melting point, be connected with the connecting wire in the circuit when connecting wire 4, realize the circular telegram, the electric current realizes switching on through resistance wire 6 and fusing temperature insurance layer 2, and when the abnormal current appears, the electric current exceeds the rated current of wire-wound resistance wire 6, but when not reaching the electric current that makes to flow through resistance wire 6 fusing again, its resistance wire 6 continues electrically conductive under the situation of generating heat, and at this moment, when the temperature reaches fusing temperature insurance layer 2, fusing temperature insurance layer 2 just breaks off, make this embodiment break off, play the effect of at once protection circuit.

The above embodiments are only for illustrating the utility model and are not to be construed as limiting the utility model, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, therefore, all equivalent technical solutions also belong to the scope of the utility model, and the scope of the utility model is defined by the claims.

Claims

1. A composite resistor comprising a ceramic insulator (1), characterized in that: the ceramic insulator is characterized in that conductive caps (3) are fixed at the left end and the right end of the ceramic insulator (1), conductive ring bodies (5) are clamped on the outer side wall of the middle part of the ceramic insulator (1), a fusing temperature safety layer (2) is sprayed on the outer surface of the ceramic insulator (1) between one conductive cap (3) and one conductive ring body (5), the fusing temperature safety layer (2) is in contact with the corresponding conductive cap (3) and the corresponding conductive ring body (5), and a resistance wire (6) is wound on the ceramic insulator (1) between the conductive ring body (5) and the other conductive cap (3);

one end of the resistance wire (6) is contacted with the corresponding conductive cap (3), the other end is contacted with the conductive ring body (5), and the middle part of the outer wall surface of the conductive cap (3) is fixed with a connecting lead (4).

2. A composite resistor according to claim 1, characterized in that: two ends of the ceramic insulator (1) are clamped in the corresponding conductive caps (3), one end of the fusing temperature safety layer (2) is clamped between the inner side wall of the corresponding conductive cap (3) and the ceramic insulator (1), and the other end of the fusing temperature safety layer (2) is clamped between the inner side wall of the conductive ring body (5) and the outer side wall of the ceramic insulator (1).

3. A composite resistor according to claim 1, characterized in that: the conductive cap (3) is a metal conductive cover body.

4. A composite resistor according to claim 1, characterized in that: the conductive ring body (5) is a metal conductive ring body.

5. A composite resistor according to claim 1, characterized in that: one end of the resistance wire (6) is welded and fixed on the corresponding conductive cap (3), and the other end is welded and fixed on the conductive ring body (5).

6. A composite resistor according to claim 1, characterized in that: the fusing temperature safety layer (2) is tin-based alloy.

7. A composite resistor according to claim 1, characterized in that: the resistance wire (6) is a safety resistance wire.