CN215577979U - Leadless winding resistor - Google Patents
Leadless winding resistor Download PDFInfo
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- CN215577979U CN215577979U CN202122072685.9U CN202122072685U CN215577979U CN 215577979 U CN215577979 U CN 215577979U CN 202122072685 U CN202122072685 U CN 202122072685U CN 215577979 U CN215577979 U CN 215577979U
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- rod
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Abstract
The utility model discloses a leadless winding resistor, which comprises a resistor rod and a resistance wire wound on the resistor rod, and also comprises: the resistor outer sleeve is arranged in the middle in a hollow mode, the resistor rod penetrates through the resistor outer sleeve, and the resistor rod is provided with a connecting end extending out of the resistor outer sleeve; the iron cap comprises an outer iron cap and an inner iron cap which are integrally arranged, the inner iron cap is fixedly connected with the connecting end, the outer diameter of the inner iron cap is smaller than that of the outer iron cap, the outer diameter of the outer iron cap is approximately the same as that of the resistor outer sleeve, the end part of the resistance wire is welded with the inner iron cap, and a welding spot is formed on the inner iron cap; and the positioning structure comprises a plurality of grooves which are arranged on the resistance rod and can contain the resistance wire. The utility model has reasonable structural design, effectively reduces or eliminates the height difference between the iron cap and the resistance rod, ensures that welding spots are not easy to touch, has high safety, can position the resistance wire and is convenient for winding the resistance wire.
Description
Technical Field
The utility model relates to the technical field of resistors, in particular to a leadless winding resistor.
Background
With the rapid development of electronic technology, resistors are still continuously advancing as an essential component in electronic components. The resistor is generally directly called as a resistor in daily life, the magnitude of the resistance of the resistive element is generally related to temperature, material, length, and also cross-sectional area, and the physical quantity that measures the magnitude of the resistance affected by temperature is the temperature coefficient, which is defined as the percentage of the change in resistance value per 1 ℃ rise in temperature. The main physical characteristic of the resistor is that the electric energy is changed into heat energy, and the resistor can also be called as an energy consumption element, and the electric current generates internal energy through the energy consumption element. The resistor generally plays a role in voltage division and shunt in the circuit.
The winding resistor is made by winding nickel-chromium wire, manganese copper wire and constantan wire on a resistor rod, and the resistor rod is made of ceramic, plastic, metal coated with an insulating layer and other materials and is in various shapes such as a tube shape, a flat shape and the like. The winding resistor has the characteristics of high resistance precision, high power, low working noise, stability, reliability, high temperature resistance and the like. Most of the existing winding resistors have the following structure: resistance wires are wound on the resistance rods, and pins are led out from the left side and the right side of the resistance rods. And the resistance of above-mentioned structure can only adopt the mode installation of pegging graft, has seted up the jack promptly on the circuit board, and two pins of resistance are followed the jack respectively and are inserted, and after the circuit board passed through wave-soldering, soldering tin can weld the pin in jack department, cuts the pin through cutting the foot machine again. As can be seen from the foregoing, the conventional resistor is very troublesome to produce and process, and has many processes and low production efficiency.
In recent years, a resistor manufacturer designs a patch type winding resistor, and the structure of the winding resistor is as follows: and iron caps are additionally arranged on two sides of the resistance rod, the resistance wire is wound on the resistance rod, and two ends of the resistance wire are welded on the iron caps. However, the above structure has the following drawbacks: firstly, the height difference exists between the iron cap and the resistor rod, so that the resistor is inconvenient to absorb by a chip mounter; secondly, because the welding spot is directly arranged on the iron cap, the resistor is not flat when being attached to the circuit board, and the wire-wound welding spot is easily touched, so that the resistance value of the resistor is easy to lose efficacy, and the safety is not high; thirdly, when the resistance wire is wound on the resistance rod, the resistance wire does not have a good positioning effect, so that automatic winding equipment is inconvenient to wind, and the winding quality cannot be well guaranteed.
Disclosure of Invention
The utility model overcomes the defects of the prior art, provides the leadless winding resistor, has reasonable structural design, effectively reduces or eliminates the height difference between the iron cap and the resistance rod, has difficult touch of welding spots and high safety, can also position the resistance wire and is convenient for winding the resistance wire.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a leadless wire winding resistance, includes the resistance stick and twines the resistance wire on the resistance stick, still includes:
the resistor outer sleeve is arranged in the middle in a hollow mode, the resistor rod penetrates through the resistor outer sleeve, and the resistor rod is provided with a connecting end extending out of the resistor outer sleeve;
the iron cap comprises an outer iron cap and an inner iron cap which are integrally arranged, the inner iron cap is fixedly connected with the connecting end, the outer diameter of the inner iron cap is smaller than that of the outer iron cap, the outer diameter of the outer iron cap is approximately the same as that of the resistor outer sleeve, the end part of the resistance wire is welded with the inner iron cap, and a welding spot is formed on the inner iron cap;
and the positioning structure comprises a plurality of grooves which are arranged on the resistance rod and can contain the resistance wire.
As preferred, location structure is still including locating the arc wall that the resistance stick goes up and is close to the link setting to and locate on the resistance overcoat and correspond the locating component who sets up with the arc wall, seted up the blind hole on the inner wall of resistance overcoat, locating component including locate reset spring in the blind hole and with reset spring be connected and with the hemisphere fixture block of arc wall looks adaptation.
Preferably, a stage is formed between the inner iron cap and the resistor outer sleeve and between the inner iron cap and the outer iron cap, a heat-shrinkable rubber ring is sleeved on the stage, and the heat-shrinkable rubber ring is flush with the resistor outer sleeve or the outer iron cap.
Preferably, the inner iron cap is provided with an annular groove capable of containing the heat-shrinkable rubber ring on the axial periphery of the inner iron cap, the inner iron cap is divided into a plane part and a concave part by the annular groove, and the welding point is positioned on the plane part of the annular groove close to the connecting end.
The utility model has the beneficial effects that:
the utility model has reasonable structural design, effectively reduces or eliminates the height difference between the iron cap and the resistance rod, ensures that welding spots are not easy to touch, has high safety, can position the resistance wire and is convenient for winding the resistance wire.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a schematic diagram of a structure of a resistance rod according to an embodiment of the present invention;
FIG. 4 is an enlarged view at B in FIG. 3;
FIG. 5 is a schematic diagram of a resistive outer jacket according to an embodiment of the present invention;
FIG. 6 is an enlarged view at C of FIG. 5;
fig. 7 is a schematic structural diagram of an inner iron cap and an outer iron cap according to an embodiment of the present invention.
In the figure: 1. a resistance rod; 11. a connecting end; 2. a resistance wire; 3. a resistance outer sleeve; 31. blind holes; 4. an outer iron cap; 5. an inner iron cap; 51. an annular groove; 52. a planar portion; 53. a recessed portion; 6. welding spots; 71. a groove; 72. an arc-shaped slot; 73. a return spring; 74. a hemispherical fixture block; 8. and (4) a heat-shrinkable rubber ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-7, a leadless winding resistor includes a resistor rod 1 and a resistance wire 2 wound on the resistor rod 1, and further includes: the resistor outer sleeve 3 is arranged in the hollow part, the resistor rod 1 penetrates through the resistor outer sleeve 3, and the resistor rod 1 is provided with a connecting end 11 extending out of the resistor outer sleeve 3; the iron cap comprises an outer iron cap 4 and an inner iron cap 5 which are integrally arranged, the inner iron cap 5 is fixedly connected with the connecting end 11, the outer diameter of the inner iron cap 5 is smaller than that of the outer iron cap 4, the outer diameter of the outer iron cap 4 is approximately the same as that of the resistance outer sleeve 3, the end part of the resistance wire 2 is welded with the inner iron cap 5, and a welding spot 6 is formed on the inner iron cap 5; and the positioning structure comprises a plurality of grooves 71 which are arranged on the resistance rod 1 and can accommodate the resistance wire 2.
By adopting the technical scheme, the resistor outer sleeve 3 is arranged, and the outer diameter of the outer iron cap 4 is approximately the same as that of the resistor outer sleeve 3, so that the height difference does not exist between the iron cap and the resistor rod 1, and the resistor can be conveniently absorbed by a chip mounter; the welding spot 6 is arranged on the inner iron cap 5, so that the resistor can be kept flat when being attached to a circuit board, the wire-wound welding spot 6 is not easy to touch, and the safety is high; and the arrangement of the groove 71 can have a certain positioning effect on the resistance wire 2, so that the winding of automatic winding equipment is facilitated, and the winding quality can be well guaranteed.
As an improved specific implementation manner, the positioning structure further includes an arc-shaped groove 72 disposed on the resistance rod 1 and close to the connecting end 11, and a positioning assembly disposed on the resistance outer sleeve 3 and corresponding to the arc-shaped groove 72, the inner wall of the resistance outer sleeve 3 is provided with a blind hole 31, and the positioning assembly includes a return spring 73 disposed in the blind hole 31 and a hemispherical fixture block 74 connected with the return spring 73 and adapted to the arc-shaped groove 72.
Through adopting above-mentioned technical scheme, the cooperation setting of arc wall 72 and hemisphere fixture block 74 can carry out fine location with that section that resistance wire 2 stretches out resistance rod 1 and fix, further improves the positioning action to resistance wire 2.
As a modified specific implementation mode, a stage is formed between the inner iron cap 5 and the resistance outer sleeve 3 and between the inner iron cap and the outer iron cap 4, a heat-shrinkable rubber ring 8 is sleeved on the stage, and the heat-shrinkable rubber ring 8 is flush with the resistance outer sleeve 3 or the outer iron cap 4.
Through adopting above-mentioned technical scheme, when the setting of pyrocondensation rubber ring 8 ensured the leakproofness, also made the surface of resistance more level and more smooth.
As a modified specific embodiment, the inner iron cap 5 is provided with an annular groove 51 on its axial outer periphery for accommodating the heat-shrinkable rubber ring 8, the annular groove 51 divides the inner iron cap 5 into a planar portion 52 and a recessed portion 53, and the welding point 6 is located on the planar portion 52 of the annular groove 51 near the connecting end 11.
Through adopting above-mentioned technical scheme, the setting of ring channel 51 can be fixed a position pyrocondensation rubber ring 8, and solder joint 6 is located ring channel 51 and is close to the plane portion 52 of link 11 on, the welding of resistance wire 2 and interior iron hat 5 of being convenient for.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (4)
1. The utility model provides a no lead wire winding resistance, includes the resistance stick and twines the resistance wire on the resistance stick, its characterized in that still includes:
the resistor outer sleeve is arranged in the middle in a hollow mode, the resistor rod penetrates through the resistor outer sleeve, and the resistor rod is provided with a connecting end extending out of the resistor outer sleeve;
the iron cap comprises an outer iron cap and an inner iron cap which are integrally arranged, the inner iron cap is fixedly connected with the connecting end, the outer diameter of the inner iron cap is smaller than that of the outer iron cap, the outer diameter of the outer iron cap is approximately the same as that of the resistor outer sleeve, the end part of the resistance wire is welded with the inner iron cap, and a welding spot is formed on the inner iron cap;
and the positioning structure comprises a plurality of grooves which are arranged on the resistance rod and can contain the resistance wire.
2. The leadless winding resistor of claim 1, wherein the positioning structure further comprises an arc-shaped groove disposed on the resistor rod and near the connecting end, and a positioning assembly disposed on the resistor outer sleeve and corresponding to the arc-shaped groove, the inner wall of the resistor outer sleeve is provided with a blind hole, and the positioning assembly comprises a return spring disposed in the blind hole and a hemispherical fixture block connected with the return spring and adapted to the arc-shaped groove.
3. A leadless winding resistor according to claim 1 or 2, wherein a stage is formed between the inner iron cap and the resistor outer sleeve and between the inner iron cap and the outer iron cap, and a heat-shrinkable rubber ring is sleeved on the stage and is flush with the resistor outer sleeve or the outer iron cap.
4. The leadless winding resistor of claim 3 wherein the inner iron cap has an annular groove formed on an axial outer periphery thereof for receiving the heat-shrinkable rubber ring, the annular groove dividing the inner iron cap into a planar portion and a recessed portion, and the welding point is located on the planar portion of the annular groove near the connection end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122072685.9U CN215577979U (en) | 2021-08-30 | 2021-08-30 | Leadless winding resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122072685.9U CN215577979U (en) | 2021-08-30 | 2021-08-30 | Leadless winding resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215577979U true CN215577979U (en) | 2022-01-18 |
Family
ID=79844437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122072685.9U Active CN215577979U (en) | 2021-08-30 | 2021-08-30 | Leadless winding resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215577979U (en) |
-
2021
- 2021-08-30 CN CN202122072685.9U patent/CN215577979U/en active Active
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