Anti-interference resistor

Abstract

The utility model discloses an anti-interference resistor which comprises an insulating rod, a resistance wire, pins and a protective shell, the resistance wire surrounds the outer surface of the insulating rod, the two pins are respectively arranged at two ends of the insulating rod, the protective shell comprises a sleeve and two end covers, through holes are formed in the end covers, and the two ends of the sleeve are respectively provided with a through hole. A through hole is formed in the outer surface of the sleeve, the pin penetrates out of the through hole, a protective layer is arranged on the inner surface of the sleeve and comprises a heat conduction silica gel layer and a metal shielding layer, a sandwich type metal shielding layer is arranged in the heat conduction silica gel layer, and heat dissipation lines are arranged on the outer surface of the sleeve. The resistor is shielded by the metal shielding layer, so that the resistor is prevented from receiving electromagnetic interference, and the working stability of the resistor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of resistors, in particular to the technical field of anti-interference resistors. Background Art

[0002] Resistors are generally called resistors in daily life. They are current limiting components. After connecting a resistor to a circuit, the resistance of the resistor is fixed. Generally, it has two pins. It can limit the current through the branch it is connected to. Resistors whose resistance cannot be changed are called fixed resistors. Resistors whose resistance can be changed are called potentiometers or variable resistors.

[0003] During use, resistors are very susceptible to electromagnetic interference and have poor heat dissipation, which causes the resistors to be unstable during operation. Utility Model Content

[0004] The purpose of the utility model is to solve the problems in the prior art and to provide an anti-interference resistor that can solve the above problems.

[0005] To achieve the above-mentioned purpose, the utility model proposes an anti-interference resistor, comprising an insulating rod, a resistance wire, a pin and a protective shell, wherein the resistance wire is wrapped around the outer surface of the insulating rod, and two pins are respectively arranged at two ends of the insulating rod, and the protective shell comprises a sleeve and two end covers, the sleeve is sleeved on the outside of the insulating rod, and the two end covers are respectively installed at the two ends of the sleeve, a through hole is opened on the end cover, and the pin passes through the through hole, and the inner surface of the sleeve is provided with a protective layer, and the protective layer comprises a thermal conductive silicone layer and a metal shielding layer, a sandwich-type metal shielding layer is arranged in the thermal conductive silicone layer, and the outer surface of the sleeve is provided with a heat dissipation pattern.

[0006] Preferably, a plurality of raised heat-conducting silicone columns are arranged around the inner surface of the end cover, and the ends of the heat-conducting silicone columns are in contact with the end surface of the insulating rod.

[0007] Preferably, a threaded barrel is provided on one side of the end cover close to the sleeve, and external threads matching the threaded barrel are provided on both ends of the sleeve.

[0008] Preferably, the protective shell and the end cover are made of a material with good thermal conductivity.

[0009] Preferably, the inner surface of the end cover is also provided with a protective layer.

[0010] Preferably, the outer surfaces of the protective shell and the end cover are provided with a corrosion-resistant coating.

[0011] Preferably, the metal shielding layer is a copper wire mesh shielding layer or an aluminum wire mesh shielding layer.

[0012] The beneficial effects of the utility model are as follows: the utility model shields the resistor through the metal shielding layer to prevent the resistor from receiving electromagnetic interference and improve the working stability of the resistor; the heat of the resistor is conducted to the protective shell through the thermal conductive silicone layer, and the protective shell is provided with heat dissipation patterns to increase the surface area of ​​the protective shell, improve the heat dissipation effect of the resistor, and be safer; the two ends of the insulating rod are fixed by the thermal conductive silicone column, which is convenient for installation and improves the heat dissipation effect.

[0013] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the anti-interference resistor of the utility model;

[0015] Figure 2 It is a schematic diagram of the protective layer of the utility model.

[0016] In the figure: 1-insulating rod; 2-resistance wire; 3-pin; 4-protective shell; 5-sleeve; 6-end cover; 7-protective layer; 71-thermal conductive silicone layer; 72-metal shielding layer; 8-thermal conductive silicone column. DETAILED DESCRIPTION

[0017] See also Figure 1 , Figure 2 , an anti-interference resistor, comprising an insulating rod 1, a resistance wire 2, a pin 3 and a protective shell 4, wherein the resistance wire 2 surrounds the outer surface of the insulating rod 1, two pins 3 are respectively arranged at the two ends of the insulating rod 1, the protective shell 4 comprises a sleeve 5 and two end covers 6, the sleeve 5 is sleeved on the outer side of the insulating rod 1, the two end covers 6 are respectively installed at the two ends of the sleeve 5, a through hole is opened on the end cover 6, the pin 3 passes through the through hole, the inner surface of the sleeve 5 is provided with a protective layer 7, the protective layer 7 comprises a thermal conductive silicone layer 71 and a metal shielding layer 72, and a clip is provided in the thermal conductive silicone layer 71 A core-shaped metal shielding layer 72, the outer surface of the sleeve 5 is provided with heat dissipation patterns, the inner surface of the end cover 6 is ringed with a plurality of raised heat-conducting silicone columns 8, the ends of the heat-conducting silicone columns 8 are in contact with the end surface of the insulating rod 1, and a threaded barrel is provided on the side of the end cover 6 close to the sleeve 5, and both ends of the sleeve 5 are provided with external threads matching the threaded barrel, the protective shell 4 and the end cover 6 are made of aluminum material with good thermal conductivity, the inner surface of the end cover 6 is also provided with a protective layer 7, the outer surfaces of the protective shell 4 and the end cover 6 are provided with a corrosion-resistant coating, and the metal shielding layer 72 is a copper wire mesh shielding layer or an aluminum wire mesh shielding layer.

[0018] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. An anti-interference resistor, characterized in that: The invention comprises an insulating rod (1), a resistance wire (2), a pin (3) and a protective shell (4), wherein the resistance wire (2) surrounds the outer surface of the insulating rod (1), and two pins (3) are respectively arranged at two ends of the insulating rod (1); the protective shell (4) comprises a sleeve (5) and two end covers (6), wherein the sleeve (5) is sleeved on the outer side of the insulating rod (1), and the two end covers (6) are respectively installed at two ends of the sleeve (5); a through hole is opened on the end cover (6), and the pin (3) passes through the through hole; a protective layer (7) is provided on the inner surface of the sleeve (5), and the protective layer (7) comprises a heat-conducting silicone layer (71) and a metal shielding layer (72); a sandwich-type metal shielding layer (72) is provided in the heat-conducting silicone layer (71); and a heat dissipation pattern is provided on the outer surface of the sleeve (5).

2. The anti-interference resistor according to claim 1, characterized in that: The inner surface of the end cover (6) is provided with a plurality of raised heat-conducting silicone columns (8), and the ends of the heat-conducting silicone columns (8) are in contact with the end surface of the insulating rod (1).

3. The anti-interference resistor according to claim 1, characterized in that: A threaded barrel is provided on one side of the end cover (6) close to the sleeve (5), and external threads matching the threaded barrel are provided at both ends of the sleeve (5).

4. The anti-interference resistor according to claim 1, characterized in that: The protective shell (4) and the end cover (6) are made of a material with good thermal conductivity.

5. The anti-interference resistor according to claim 1, characterized in that: The inner surface of the end cover (6) is also provided with a protective layer (7).

6. The anti-interference resistor according to claim 1, characterized in that: The outer surfaces of the protective shell (4) and the end cover (6) are provided with a corrosion-resistant coating.

7. The anti-interference resistor according to claim 1, characterized in that: The metal shielding layer (72) is a copper wire mesh shielding layer or an aluminum wire mesh shielding layer.

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