CN218996452U

CN218996452U - Fusible resistor

Info

Publication number: CN218996452U
Application number: CN202223496117.2U
Authority: CN
Inventors: 黄正芳; 周荣林; 袁海兵
Original assignee: Nanjing Xianzheng Electronics Co ltd
Current assignee: Nanjing Xianzheng Electronics Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-05-09
Anticipated expiration: 2032-12-27

Abstract

The utility model provides a fusible resistor, which comprises a pressing and separating rod, wherein the outer wall of the pressing and separating rod is provided with a notch, caps are soldered at the two ends of the pressing and separating rod, a lead positioning piece is arranged at the center of the outer wall of each cap, a lead penetrates through the inside of each lead positioning piece, and the inner ends of the leads are soldered with the caps; the outer walls of the pressing and separating rod and the cap are sprayed with insulating protective layers. The utility model releases the impact force at the instant of fusing by adjusting the film forming structure of the coating, thereby achieving the explosion-proof and fire-proof effects of the coating layer; the pulse-resistant stamping parting rod is selected for the stamping parting rod, so that the resistor can meet pulse and can be fused under specified voltage; the resistor is convenient to manufacture, simple in structure, low in price and low in production cost.

Description

Fusible resistor

Technical Field

The utility model relates to the technical field of resistors, in particular to a fusible resistor.

Background

The explosion-proof and fire-proof resistor which can meet the requirements of pulse and fuse is a special element with the dual functions of a resistor and a fuse, and the resistor requires that a product can bear instantaneous high voltage which is neglected in a circuit and fuse in a specified time to protect the working environment of the product. The explosion-proof and fire-proof resistor capable of meeting pulse and fusing is extremely wide in application, industrial field, household appliance field and the like. The common assembly requirements of the explosion-proof and fire-proof resistor which can be used for pulse and fusing are met, the high-voltage pulse is required to be resisted, the explosion-proof and fire-proof resistor is required to be fused, no product is produced in China at present, the use end adopts imported products, and the price of the imported products is high.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a fusible resistor, which can solve the problem that the existing resistor cannot meet the requirements of fusing, explosion prevention and fire prevention at low cost.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model is realized by the following technical scheme: the fusible resistor comprises a pressing rod, wherein the outer wall of the pressing rod is provided with a notch, caps are soldered at the two ends of the pressing rod, a lead positioning piece is arranged at the center of the outer wall of each cap, a lead penetrates through the inside of each lead positioning piece, and the inner ends of the leads are soldered with the caps; the outer walls of the pressing and separating rod and the cap are sprayed with insulating protective layers.

Furthermore, the notch is in a continuous spiral shape, and the edges of the notch are smooth structures.

Further, the groove width of the groove is smaller than 0.3mm.

Further, the lead is a galvanized copper wire.

Further, the insulating protective layer comprises the following ingredients: silicone resin: quartz sand: a coupling agent; modified imidazole = 1kg:20g:10g:1g.

Further, the lead positioning piece comprises an outer cover body, and a wire hole for the lead to penetrate is formed in the center of the outer cover body; the outer cover body comprises a front ring body, a cone body and a rear ring body, the front ring body is arranged at the outer end of the cone body, the rear ring body is arranged at the rear end of the cone body, the outer diameter of the front ring body is larger than that of the rear ring body, and the rear ring body is welded on the cap.

Further, the outer wall symmetry of cone has seted up first operation window, second operation window, and first operation window, second operation window are arranged in the outside of lead wire relatively, and first operation window's inside interference embedding has first sealing plug, and second operation window's inside interference embedding has the second sealing plug.

Further, a plurality of first connecting ribs are arranged in the first operation window at intervals along the axis direction, the inner walls of the first connecting ribs are flush with the inner walls of the cones, and the thickness of the first connecting ribs is smaller than that of the cones; each first connecting rib is glued with the lead; the first sealing plug is abutted against the outer wall of the first connecting rib; a plurality of second connecting ribs are arranged in the second operation window at intervals along the axis direction, the inner walls of the second connecting ribs are flush with the inner walls of the cones, and the thickness of the second connecting ribs is smaller than that of the cones; the second sealing plug is abutted against the outer wall of the second connecting rib.

A method of making a fusible resistor, the method comprising the steps of:

selecting a pressure separation rod which can bear pulse impact and is fused under a specified voltage;

the grooves are engraved on the pressure dividing rod, the appearance of the grooves is continuous, the distribution is uniform, the edges are smooth, the phenomena of broken grooves, saw teeth, burrs, female and male surfaces and the like are avoided, the depth of the grooves is limited by the penetration of the film layer, and the grooves are not too deep and are not penetration;

the lead and the cap are firmly welded together, and the two ends of the pressure dividing rod are provided with leading-out ends;

uniformly coating an insulating protective layer on the outer walls of the pressing and separating rod and the cap;

and marking the color ring mark on the outer surface of the insulating protective layer.

Further, the lead positioning piece is sleeved on the lead, and the lead positioning piece is welded on the cap; glue-fixing the first connecting ribs with the lead wires; and loading the first sealing plug and the second sealing plug.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model releases the impact force at the instant of fusing by adjusting the film forming structure of the coating, thereby achieving the explosion-proof and fire-proof effects of the coating layer;

the pulse-resistant stamping parting rod is selected, so that the resistor can meet pulse and can be fused under specified voltage;

the resistor of the utility model has the advantages of convenient manufacture, simple structure, low price and low production cost.

Drawings

The disclosure of the present utility model is described with reference to the accompanying drawings. It should be understood that the drawings are for purposes of illustration only and are not intended to limit the scope of the present utility model in which like reference numerals are used to designate like parts. Wherein:

FIG. 1 is a schematic diagram of the overall structure of a fusible resistor according to the present utility model;

FIG. 2 is a schematic view of a press-dividing bar according to the present utility model;

FIG. 3 is a schematic diagram of a method of fabricating a fusible resistor according to the present utility model;

FIG. 4 is a schematic view of the internal cross-sectional structure of the lead wire positioning member of the present utility model;

FIG. 5 is a schematic view of a lead positioner according to the present utility model;

the reference numerals in the drawings indicate: 1. pressing and separating the rod; 11. grooving; 2. a cap; 3. an insulating protective layer; 4. a lead wire positioning member; 41. a front ring body; 42. a cone; 421. a first operation window; 4211. the first connecting ribs; 422. a second operation window; 4221. the second connecting ribs; 43. a rear ring body; 44. a wire hole; 5. a lead wire; 6. a first sealing plug; 7. and a second sealing plug.

Detailed Description

It is to be understood that, according to the technical solution of the present utility model, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present utility model. Accordingly, the following detailed description and drawings are merely illustrative of the utility model and are not intended to be exhaustive or to limit the utility model to the precise form disclosed.

Example 1

The fusible resistor comprises a pressure division rod 1, wherein notch grooves 11 are formed in the outer wall of the pressure division rod 1, caps 2 are soldered at two ends of the pressure division rod 1, a lead positioning piece 4 is arranged in the center of the outer wall of each cap 2, a lead 5 penetrates through the inside of each lead positioning piece 4, and the inner ends of the leads 5 are soldered with the caps 2; the outer walls of the pressure separation rod 1 and the cap 2 are sprayed with an insulating protection layer 3.

In this embodiment, the notch 11 is in a continuous spiral shape, and the edges of the notch 11 are smooth structures.

In this embodiment, the groove width of the score groove 11 is less than 0.3mm. The depth of the groove is limited by the outermost film layer of the embossing parting rod 1, and the embossing is not needed to be too deep or not to be embossed.

In this embodiment, the lead 5 is a galvanized copper wire.

In this embodiment, silicone: quartz sand: a coupling agent; modified imidazole = 1kg:20g:10g:1g.

As shown in fig. 3, in this embodiment, the method for manufacturing the fusible resistor includes the following steps:

selecting a pressure separation rod 1 which can bear pulse impact and is fused under a specified voltage; the product manufactured by the pressure dividing rod 1 is connected with a 270uF capacitor in parallel at the rear stage of the resistor, the change rate of the resistance value of the product is < +/-1% after 10000 times of power-on impact by using the mains supply, and 220V alternating current voltage is fused in a specified time, so that the purpose of protecting a circuit is achieved; the grooves 11 are engraved on the pressure dividing rod 1, the grooves 11 are continuous in appearance, uniform in distribution and smooth in edge, phenomena such as broken grooves, saw teeth, burrs, sunny and shady surfaces are avoided, the groove depth is limited by the engraving of the film layer, and the grooves are not too deep and are not engraved; the lead 5 and the cap 2 are firmly welded together, and the two ends of the pressure dividing rod 1 are provided with leading-out ends; uniformly coating an insulating protective layer 3 on the outer walls of the pressure separation rod 1 and the cap 2; the insulating protective layer 3 is a special explosion-proof and fire-proof coating paint; color ring marks are marked on the outer surface of the insulating protective layer 3.

The embodiment has the following technical effects: the impact force at the moment of fusing is released by adjusting the film forming structure of the coating, so that the explosion and fire prevention effect of the coating layer is achieved; the pulse-resistant voltage division rod 1 is selected as the voltage division rod 1, so that the resistor can meet pulse and can be fused under a specified voltage; the resistor is convenient to manufacture, simple in structure, low in price and low in production cost.

To verify the technical effect described above, the following comparative tests were performed: two conventional resistors are selected as comparative example 1 and comparative example 2, and a resistor prepared by pulse-resistant stamping bar and a special coating layer in the embodiment is selected as comparative example 3;

from the above table, through the verification of the experiment of example 3, the product can meet the pulse and fuse under the specified voltage, and the coating layer does not burst or fire during the fusing process, so that the resistor has the best use effect.

Example two

As shown in fig. 4 and 5, on the basis of the above embodiment, the present embodiment further gives the following:

the lead positioning piece 4 comprises an outer cover body, and a wire hole 44 for the lead 5 to penetrate is formed in the center of the outer cover body; the outer cover body comprises a front ring body 41, a cone body 42 and a rear ring body 43, wherein the front ring body 41 is arranged at the outer end of the cone body 42, the rear ring body 43 is arranged at the rear end of the cone body, the outer diameter of the front ring body 41 is larger than that of the rear ring body 43, and the rear ring body 43 is welded on the cap 2; through the design dustcoat body, can enclose fender protection to lead wire 5 and the soldering department of pressure branch stick 1 to improve the intensity of this department, in order to solve the easy cracked problem of this department, further improve the explosion-proof ability of resistor.

The outer wall symmetry of cone 42 has seted up first operating window 421, second operating window 422, and first operating window 421, second operating window 422 are arranged in the outside of lead wire 5 relatively, and the inside interference embedding of first operating window 421 has first sealing plug 6, and the inside interference embedding of second operating window 422 has second sealing plug 7. Because the connecting part of the lead 5 and the resistor is covered by the outer cover body, the current value of the connecting part cannot be detected when equipment overhaul is performed, and an operator stretches the ammeter probe from the operating window to contact the lead 5 by opening the first operating window 421 and the second operating window 422, so that the current detection of the root part of the lead 5 is realized, and maintenance personnel is helped to judge the performance of the resistor; the sealing plug can seal the operation window when not using, avoids external impurity to get into.

A plurality of first connecting ribs 4211 are arranged in the first operation window 421 at intervals along the axial direction, the inner wall of the first connecting rib 4211 is flush with the inner wall of the cone 42, and the thickness of the first connecting rib 4211 is smaller than the thickness of the cone 42; each first connecting rib 4211 is glued to the lead 5; the first sealing plug 6 is abutted against the outer wall of the first connecting rib 4211; a plurality of second connecting ribs 4221 are arranged in the second operation window 422 at intervals along the axial direction, the inner walls of the second connecting ribs 4221 are flush with the inner walls of the cones 42, and the thickness of the second connecting ribs 4221 is smaller than that of the cones 42; the second sealing plug 7 abuts against the outer wall of the second connecting rib 4221.

The strength of the operation window can be improved through the first connecting ribs 4211 and the second connecting ribs 4221, meanwhile, the first connecting ribs 4211 are in glue joint and positioning with the lead 5, the positioning surface of the lead 5 can be increased, the strength of the lead 5 is further improved, and the first operation window 421 is convenient for operators to observe and glue joint; the second operating window 422 serves as the primary detection location. The lead positioning member 4 performs a welding operation after the lead is fixed.

The technical scope of the present utility model is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present utility model, and these changes and modifications should be included in the scope of the present utility model.

Claims

1. A fusible resistor, characterized by: the novel wire pressing and separating device comprises a pressing and separating rod (1), wherein a notch (11) is formed in the outer wall of the pressing and separating rod (1), caps (2) are soldered at the two ends of the pressing and separating rod (1), a wire positioning piece (4) is arranged in the center of the outer wall of each cap (2), a wire (5) penetrates through the inner part of each wire positioning piece (4), and the caps (2) are connected at the inner ends of the wires (5) in a soldering manner; the outer walls of the pressing and separating rod (1) and the cap (2) are sprayed with an insulating protection layer (3).

2. A fusible resistor as claimed in claim 1, wherein: the notch groove (11) is in a continuous spiral shape, and the edges of the notch groove (11) are of smooth structures.

3. A fusible resistor as claimed in claim 1, wherein: the groove width of the notch groove (11) is smaller than 0.3mm.

4. A fusible resistor as claimed in claim 1, wherein: the lead (5) is a galvanized copper wire.

5. A fusible resistor as claimed in claim 1, wherein: the lead positioning piece (4) comprises an outer cover body, and a wire hole (44) for the lead to penetrate is formed in the center of the outer cover body; the outer cover body comprises a front ring body (41), a cone body (42) and a rear ring body (43), the front ring body (41) is arranged at the outer end of the cone body (42), the rear ring body (43) is arranged at the rear end of the cone body, the outer diameter of the front ring body (41) is larger than that of the rear ring body (43), and the rear ring body (43) is welded on the cap (2).

6. A fusible resistor as defined in claim 5, wherein: the outer wall symmetry of cone (42) has seted up first operating window (421), second operating window (422), and first operating window (421), second operating window (422) are arranged in the outside of lead wire (5) relatively, and first sealing plug (6) have been embedded to the inside interference of first operating window (421), and second sealing plug (7) have been embedded to the inside interference of second operating window (422).

7. A fusible resistor as defined in claim 6, wherein: a plurality of first connecting ribs (4211) are arranged in the first operation window (421) at intervals along the axis direction, the inner wall of each first connecting rib (4211) is flush with the inner wall of each cone (42), and the thickness of each first connecting rib (4211) is smaller than that of each cone (42); each first connecting rib (4211) is glued with the lead; the first sealing plug (6) is abutted against the outer wall of the first connecting rib (4211);

a plurality of second connecting ribs (4221) are arranged in the second operation window (422) at intervals along the axis direction, the inner walls of the second connecting ribs (4221) are flush with the inner walls of the cones (42), and the thickness of the second connecting ribs (4221) is smaller than that of the cones (42); the second sealing plug (7) is abutted against the outer wall of the second connecting rib (4221).