CN108389667B - Resistor with a resistor element - Google Patents
Resistor with a resistor element Download PDFInfo
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- CN108389667B CN108389667B CN201810077027.9A CN201810077027A CN108389667B CN 108389667 B CN108389667 B CN 108389667B CN 201810077027 A CN201810077027 A CN 201810077027A CN 108389667 B CN108389667 B CN 108389667B
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- rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
- H01C3/14—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding
Abstract
The invention provides a resistor, which prevents dislocation of winding resistance, comprising: a columnar resistance element; first and second cap terminals provided at both ends of the resistive element; and first and second rings provided on outer peripheral sides of the first and second cap terminals, respectively, and exposing end faces and partial regions of side faces of the first and second cap terminals, respectively.
Description
Technical Field
The invention relates to a resistor, in particular to a wire-wound resistor.
Background
For example, a wire-wound resistor using an insulator for applications requiring high heat resistance is known as a resistor. The wire-wound resistor is manufactured, for example, by winding a resistance wire after cap terminals are attached to both ends of an insulator processed to a predetermined size. The end of the wire-wound resistance wire (the contact with the cap terminal) is fixed to the side surface of the cap terminal by welding or soldering.
However, the resistance wire fixed to the side surface of the cap terminal may be misaligned. Further, since the protrusion is formed on the cap terminal, it may affect the next process, and it may be difficult to realize surface mounting.
Therefore, the structures in patent documents 1 and 2 below are discussed.
In patent document 1, a resistance wire is spirally wound over the entire length of the outer peripheral portion of a resistor body having a cylindrical shape. Both ends are connected to the end face of the resistor body, fitted over the upper and lower sides, and fixed by cap terminals.
In patent document 2, terminals are attached to both ends of a base body around which a resistance wire is wound, and the periphery of the base body is covered with a heat-resistant insulating material. The terminal end portions are bent to be horizontal to the bottom surfaces of the wiring board and the cover.
Patent document
Patent document 1: japanese Utility model patent No. Sho 49-006443
Patent document 2: japanese patent laid-open publication No. H06-124801
The structure of patent document 1 requires a complicated process of fixing the resistance wire to the end face of the insulator. Therefore, there is a problem that the manufacturing process is complicated.
The surface mounting structure according to patent document 2 requires processing accuracy of terminals and the like for making the terminals flush with the bottom surface of the cover. Further, there is a problem that the size of the component becomes large.
Disclosure of Invention
The invention aims to prevent the dislocation of resistance wires (winding wires) of a resistor. Further, the present invention aims to enable surface mounting without changing the component size of the resistor.
According to an aspect of the present invention, there is provided a resistor, comprising: a columnar wound resistor element formed by winding a resistor wire around a columnar insulator; first and second cap terminals provided at both ends of the resistive element; and first and second rings provided on outer peripheral sides of the first and second cap terminals, respectively, and exposing partial areas of end surfaces and side surfaces of the first and second cap terminals, respectively, wherein the columnar wound resistance element, the first and second cap terminals, and the first and second rings form a step in a radial direction of the columnar insulator, and first and second end portions as end ends of the resistance wire are connected to outer side surfaces of the first and second cap terminals exposed from the first and second rings, respectively.
Preferably, the resistor element is a wound resistor element in which a resistor wire is wound around a cylindrical insulator, and first and second end portions as end ends of the resistor wire are connected to outer side surfaces of the first and second cap terminals exposed from the first and second rings, respectively. The first and second rings may not cover the connection portions of the resistance wires on the outer side surfaces of the first and second cap terminals.
The first and second rings are formed to be shallower than depths of the first and second cap terminals in a length direction of the resistance element.
Preferably, the first and second rings include stoppers which are in contact with the end surfaces or the peripheral edge portions of the first and second cap terminals, respectively.
First and second leads can be connected to end surfaces of the first and second cap terminals.
According to the present invention, the resistance lines of the resistors can be prevented from being misaligned. Further, according to the present invention, surface mounting can be performed without changing the component size of the resistor.
Drawings
Fig. 1 is a side view showing a first configuration example of a wire-wound resistor according to a first embodiment of the present invention. The backside windings are also shown. In addition, the front view of the side end is also shown.
Fig. 2 is a side view showing a second configuration example of the wire resistor according to the first embodiment of the present invention. The backside windings are also shown. In addition, the front view of the side end is also shown.
Fig. 3 (a) is a side sectional view in the vicinity of the side end of fig. 1, and fig. 3 (b) is a side sectional view in the vicinity of the side end of fig. 2. Fig. 3 (c) is a cross-sectional view taken along line IIIa-IIIb in fig. 3 (a) and 3 (b).
Fig. 4 is an exploded perspective view of the wire-wound resistor.
Fig. 5 is a flowchart showing an example of a manufacturing process of the wire-wound resistor according to the present embodiment.
Fig. 6 is a diagram showing the process in fig. 5 in detail, and corresponds to fig. 3 (b).
Fig. 7 (a) is a perspective view of a resistor having a ring structure according to the first configuration example described in the first embodiment, and fig. 7 (b) is a perspective view of a resistor having a ring structure according to the second embodiment. Neither has a stopper configuration.
Figure 8 is a perspective view of a resistor based on the third embodiment in which the ring has a stopper structure,
fig. 8 (a) is a view in which the through hole of the ring has a substantially circular shape exposing only a partial region of the end surface of the cap terminal, and fig. 8 (b) is a view in which the through hole of the ring has a rectangular shape exposing only a partial region of the end surface of the cap terminal.
Fig. 9 (a) and 9 (b) are perspective views of a resistor having a stopper structure in a ring according to a fourth embodiment of the present invention.
Description of the reference numerals
A1, A2 wire-wound resistor
3 insulator (winding core)
5 resistance wire (winding)
7a, 7b first and second cap terminals
11a, 11b first and second rings
11a-1, 11b-1 opening
13a, 13b first and second stoppers
13c through hole
17a, 17b first and second leads
Detailed Description
(first embodiment)
Next, a wire-wound resistor according to a first embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a side view showing a first configuration example of a wire-wound resistor according to the present embodiment. Fig. 2 is a side view showing a second configuration example of the wire resistor according to the first embodiment of the present invention. Fig. 1 and 2 also show the resistance lines on the back side, and also show front views of side ends. Fig. 3 (a) is a side sectional view of the vicinity of the side end (region indicated by symbol X1) in fig. 1, and fig. 3 (b) is a side sectional view of the vicinity of the side end (region indicated by symbol X2) in fig. 2. Fig. 3 (c) is a cross-sectional view taken along line IIIa-IIIb in fig. 3 (a) and 3 (b). Fig. 3 (a) and 3 (b) show only one end portion side. Fig. 4 is an exploded perspective view of the wire-wound resistor (corresponding to fig. 2). But the resistance lines are omitted in fig. 4.
The wire-wound resistors a1 and a2 according to the present embodiment have first and second leads 17a and 17b connected to both ends thereof.
The wire-wound resistors a1, a2 include: an insulator (winding core) 3, a resistance wire (winding wire) 5, and first and second cap terminals 7a, 7 b.
The insulator (core winding) 3 is formed of, for example, a cylindrical insulator (alumina, mullite, forsterite, or the like).
The resistance wire (winding wire) 5 can be selected from materials such as CuNi, NiCr, FeCr, and cummnni according to a desired resistance value.
The first and second cap terminals 7a and 7b are bottomed cylindrical members having openings, and terminals obtained by plating copper, nickel, or tin on the surface of iron, copper, stainless steel, copper-nickel alloy, or the like can be used.
(first structural example)
The wire-wound resistor a1 according to the present embodiment shown in fig. 1 includes first and second rings 11a and 11 b. The first and second rings 11a and 11b are annular members that are disposed on the outer peripheral sides of the first and second cap terminals 7a and 7b, respectively, and that expose end faces and side faces of the cap terminals 7a and 7 b. The inner peripheral diameters of the first and second rings 11a, 11b are slightly larger than the outer peripheral diameters of the first and second cap terminals 7a, 7 b.
The first and second loops 11a, 11b are located outermost of the wire-wound resistor a 1. The start and end terminals of the resistance wire (winding wire) 5 are connected to the side surfaces 7a-1, 7b-1 of the first and second cap terminals 7a, 7b which are not covered with the first and second loops 11a, 11 b. The first and second rings 11a and 11b may be rings formed by plating copper, nickel, or tin on the surface of iron, copper, stainless steel, copper-nickel alloy, or the like. The cap terminal and the ring may be made of the same material or different materials.
The first and second leads 17a and 17b are connected to end surfaces of the first and second cap terminals 7a and 7b, respectively. For example, a lead plated with Sn on the surface of Cu, Fe, Al, or the like can be used as the first and second leads 17a and 17 b.
Further, SiO, for example, can be formed on the peripheral surface of the insulator (core winding) 32And a protective film of equal resistance wires (winding wires) 5.
The first and second rings 11a and 11b will be described in detail below. The first and second rings 11a and 11b do not cover the connection portion 15 of the resistance wire 5 on the outer side surfaces (outer peripheral surfaces) of the first and second cap terminals 7a and 7 b. That is, the depth L2 of the first and second rings 11a, 11b is formed shallower by L1-L2-L3 (see fig. 3 (a)) than the depth L1 of the first and second cap terminals 7a, 7 b. By providing the first and second cap terminals 7a, 7b and the first and second rings 11a, 11b with a difference in depth in the longitudinal direction of the wire-wound resistor a1, it is possible to secure a step difference t between the first and second cap terminals 7a, 7b and the first and second rings 11a, 11b at the time of assembly without increasing complicated steps2。
In addition, the exposed portions 7a-1 and 7b-1 not covered with the first and second rings 11a and 11b are formed on the first and second cap terminals 7a and 7 b. The exposed portions 7a-1 and 7b-1 are formed by connecting the ends of the resistance wires 5 by welding or the likeA connecting portion 15. More specifically, at the connecting portion 15, the thickness t1From the thickness t of the first and second cap terminals 7a, 7b2The first and second rings 11a and 11b are exposed. By adjusting the thickness t2The thickness of the connection portion 15 of the resistance wire 5 is, for example, equal to or greater than the diameter 2R (fig. 3 (c)) of the resistance wire 5, and the first and second rings 11a and 11b and the step t are formed2And (4) protecting.
(second construction example)
A wire-wound resistor a2 will be explained. Fig. 3 (b) shows a mode in which stoppers 13a and 13b described below are provided, but the first and second cap terminals 7a and 7b and the first and second rings 11a and 11b have a common relationship.
As shown in fig. 4, for example, portions 13a and 13b having a smaller diameter than the inner surfaces (inner circumferential surfaces) of the first and second rings 11a and 11b are formed on the end portions (side ends) of the first and second rings 11a and 11 b. This structure is, for example, a structure in which a through hole is formed in the bottom surface of the cap terminal. As shown in fig. 3b, the portions 13a and 13b having a smaller diameter than the inner surface (inner circumferential surface) diameter of the first and second rings 11a and 11b are smaller than the outer surface diameter of the first and second cap terminals 7a and 7 b. In this structure, when the first and second rings 11a and 11b are inserted into the first and second cap terminals 7a and 7b and pressed inward, the small diameter portions 13a and 13b come into contact with the first and second end faces 7a-2 and 7b-2 (the peripheral edge portions 7a-3 and 7b-3) of the first and second cap terminals 7a and 7b, thereby realizing a stopper function for stopping further insertion of the first and second rings 11a and 11 b. Hereinafter, the portions are referred to as first and second stoppers 13a and 13 b.
The opening diameter of the through hole 13c in the first and second stoppers 13a, 13b is at least equal to or larger than the diameter of the first and second leads 17a, 17b and equal to or smaller than the outer diameter of the first and second cap terminals 7a, 7 b. The shape, details, and the like are not particularly limited as long as the function as a stopper (the degree of catching the peripheral edge portion of the cap terminal) can be achieved.
Fig. 5 is a flowchart showing an example of a manufacturing process of the wire-wound resistor a2 according to the present embodiment. Fig. 6 is a diagram showing the detailed process of fig. 5, and corresponds to fig. 3 (b). Reference is made to fig. 1 to 4 as appropriate. Fig. 6 shows only one end portion side.
First, in step S1, the first and second cap terminals 7a and 7b are mounted on the insulator (core winding) 3 (fig. 6 (a) and 6 (b)). For example, the first and second cap terminals 7a and 7b made of metal are fitted (press-fitted) to both ends of the insulator 3 made of a cylindrical insulator formed into a predetermined size (see AR1 in fig. 6 a).
Next, in step S2, the first and second rings 11a and 11b are assembled (fig. 6 (c) and 6 (d)). For example, the first and second metal rings 11a and 11b are further fitted in the AR2 direction by press fitting or the like to the outer peripheries of the end portions (side ends) of the cap terminals 7a and 7 b.
When the first and second stoppers 13a and 13b are formed on the first and second rings 11a and 11b, the first and second rings 11a and 11b can be positioned in the insertion direction by press-fitting the first and second stoppers 13a and 13b to the positions where the first and second stoppers 13a and 13b are formed. At this time, the end surfaces of the cap terminals 7a and 7b are exposed from the first and second rings 11a and 11b (see fig. 6 (d)). Since the first and second rings 11a and 11b have a ring shape, that is, holes are opened in the end faces, air is easily released during the press-fitting step (see AR3 in fig. 6 (c)). Therefore, dimensional accuracy unevenness due to air entrapment is suppressed, and the performance of the wire-wound resistor is stabilized.
In step S3, the resistance wire 5 is wound. For example, the resistance wires 5 are wound around the outer peripheral surface of the insulator 3 at a predetermined pitch. The resistance value of the wire-wound resistor a2 depends on the type of the wire of the resistance wire 5 being wound. Further, the resistance value of the wire-wound resistor a2 can be adjusted by the winding pitch of the wound resistance wire 5. The starting end and the ending end of the resistance wire 5 are welded to the side surfaces of the first and second cap terminals 7a, 7 b. At this time, the start and end of the resistance wire 5 are soldered to the exposed portions 7a-1 and 7b-1 not covered by the first and second rings 11a and 11 b.
In step S4, the first and second leads 17a and 17b are connected by soldering. For example, the first and second leads 17a, 17b are soldered to the end surfaces 7a-2, 7b-2 of the first and second cap terminals 7a, 7b exposed from the ends of the first and second rings 11a, 11 b.
In addition, when surface mounting is performed on the winding resistor, soldering of the lead wire is not required.
Next, a protective film not shown is formed. The protective film may be formed of, for example, epoxy resin or the like over the entire portion except for the first and second leads 17a and 17 b. The protective film is formed in any process, and is formed as necessary.
Then, for example, display by color coding or the like is performed. For example, after drying and sintering, a color code representing the resistance value is applied to the surface.
Next, detection/inspection of the wire-wound resistor a2 is performed. For example, the inspection such as the appearance image inspection or the resistance value detection of the wire-wound resistor a2 is performed.
Through the above steps, for example, the wire-wound resistor a2 shown in fig. 2 and the like can be manufactured.
In step S2, the wire-wound resistor a1 of the first example of the structure without the stopper is positioned by adjusting the positions of the first and second cap terminals 7a and 7b and the first and second rings 11a and 11 b.
According to the present embodiment, the ring-shaped member is positioned at the outermost side of the wire-wound resistor a 2. By forming the structure having the first and second cap terminals 7a and 7b and the first and second rings 11a and 11b covering a part of the outer periphery thereof, a step can be formed in the radial direction of the cylindrical insulator 3, and the step can be used as a resistance wire welding region. Thus protecting the connection portion of the resistance wire 5.
Further, by forming the first and second rings 11a and 11b in a ring shape having holes on end faces, air can be easily released at the time of press-fitting, and the performance can be stabilized.
Further, by providing a difference in depth between the cap terminal and the ring, a step and a welding region can be secured between the cap terminal and the ring during assembly without increasing complicated steps.
Further, as in the second configuration example, when the stopper is formed on the ring, the stopper can be stopped at an appropriate position, and thus the manufacturing can be performed with high accuracy. And therefore cannot be pressed further to the inside.
(second embodiment)
Next, a second embodiment of the present invention will be explained. Fig. 7 (a) is a perspective view of the wire-wound resistor having no stopper structure on the ring described in the first configuration example (fig. 1) of the first embodiment.
Fig. 7 (b) is a diagram showing a configuration example of a wire-wound resistor according to the present embodiment, and a slit 21 having a certain width in the circumferential direction is formed in at least one portion in the circumferential direction of fig. 7 (a). This ring is called a C-ring. The C-ring has an advantage that the ring inner diameter does not require strict dimensional accuracy because the first and second rings 11a and 11b do not need to be formed in a tubular shape in advance, and a metal plate can be wound around a predetermined portion of the outer periphery of the cap terminals 7a and 7 b. The widths of the slits 21 are equally spaced in the extending direction toward the insulator 3 in fig. 7 (b), but the shape of the spacing is not limited to such an equally spaced shape. The first and second rings 11a and 11b at both ends may have different positions, widths, numbers, and the like of slits. The connection portion 15 of the resistance wire 5 may be provided in the slit region.
(third embodiment)
In the third embodiment of the present invention, a structure in which the through holes 13c of the first and second rings 11a and 11b have different shapes will be described. In the second embodiment shown in fig. 7 (b), the stopper structure is not provided as shown in fig. 3 (a). That is, the openings at the side ends of the first and second rings 11a and 11b have a substantially circular shape in which substantially the entire surfaces of the end surfaces of the first and second cap terminals 7a and 7b are exposed.
On the other hand, as shown in fig. 8 (a) and 8 (b), the winding resistor according to the third embodiment of the present invention has a stopper structure as shown in fig. 3 (b).
As shown in fig. 2 and 3 (b), in fig. 8 (a), the openings 11a-2 and 11b-2 at the side ends of the first and second rings 11a and 11b have a substantially circular shape in which only a partial region of the end surfaces of the first and second cap terminals 7a and 7b is exposed.
In fig. 8 (b), the openings 11a-3 and 11b-3 of the first and second rings 11a and 11b have a rectangular shape in which only a partial region of the end surfaces of the cap terminals 7a and 7b is exposed. The first and second stoppers 13a-1, 13a-2, 13b-1, and 13b-2 provided on the first and second rings 11a and 11b may be formed by punching a cap member to form a through hole 13 c.
The rings shown in fig. 8 (a) and 8 (b) have the advantage that air is easily released and the performance is stable when pressed in, and the advantage that the rings function as the first and second stoppers 13a-1, 13a-2, 13b-1, and 13b-2 when pressed in. In addition, there is an advantage that the region for connecting the first and second leads 17a, 17b is easily known.
(fourth embodiment)
In the fourth embodiment of the present invention, a structure in which the shape of the stopper formed in the first and second rings 11a and 11b is different from (a) and (b) of fig. 8 will be described. FIGS. 9 (a) and
fig. 9 (b) is a perspective view showing a stopper structure of the ring according to the present embodiment. In fig. 9 (a), the first and second rings 11a and 11b have through holes 13c similar to fig. 7 (a) and 7 (b), and claw-shaped stoppers 13a-3, 13a-4, 13b-3, and 13b-4 extending from a part of the opening edge of the through hole 13c toward the center of the through hole 13c are provided. In the drawings, a plurality of stoppers (two stoppers in the drawings) are provided, but the present invention is not limited thereto. For the shape, for example, the width of the claw-like stoppers 13a-3, 13a-4, 13b-3, 13b-4 in the figure is the same in the longitudinal direction, but the width and length of each claw may be different.
The structure shown in fig. 9 (b) can be realized by forming two notches in the circumferential direction from the structure shown in fig. 8 (a), for example. In fig. 9 (b), a plurality of (two in the figure) first and second stoppers 13a-5, 13a-6, 13b-5, and 13b-6 each having a pair of claw shapes extending from the opening edge portions of the openings 11a-4 and 11b-4 of the first and second rings 11a and 11b to the central portions of the openings 11a-4 and 11b-4 are provided. At this time, the end face peripheral edge portions of the cap terminals 7a, 7b are exposed from between the first and second stoppers 13a-5 and 13a-6, 13b-5 and 13 b-6.
The structure shown in fig. 9 (b) can be realized by forming two notches extending in the circumferential direction from the structure of fig. 8 (a) so as to expose the end surfaces 7a-2 and 7b-2 of the first and second cap terminals 7a and 7 b.
The first and second stoppers 13a-3, 13a-4, 13b-3, 13b-4, or 13a-5, 13a-6, 13b-5, 13b-6 provided in the first and second rings 11a, 11b may be formed by punching a cap-shaped member to form the through-hole 13 c.
Further, a cutout may be provided in a part of the first and second rings 11a and 11b in the circumferential direction to expose a part of the side surface of the first and second cap terminals 7a and 7 b.
The rings shown in fig. 9 (a) and 9 (b) have the advantages of facilitating the release of air during pressing and stabilizing the performance, and improving the function as a stopper during pressing. Further, the depth of press-fitting (the width of the exposed portion not covered with the first and second rings) can be finely adjusted according to the bent position of the claw-shaped portion.
In the above-described embodiments, the configuration and the like illustrated in the drawings are not limited thereto, and can be appropriately changed within a range in which the effects of the present invention can be achieved. In addition, appropriate changes can be made without departing from the scope of the object of the present invention.
For example, a resistive film element such as a metal film resistor, an oxide metal film resistor, or a carbon film resistor may be used.
In addition, the components of the present invention may be arbitrarily selected and the invention including the selected components is also included in the scope of the present invention.
Industrial applicability
The invention can be used for resistors.
Claims (5)
1. A resistor, comprising:
a columnar wound resistor element formed by winding a resistor wire around a columnar insulator;
first and second cap terminals provided at both ends of the resistive element;
first and second rings provided on outer peripheral sides of the first and second cap terminals, respectively, and exposing end faces and side faces of the first and second cap terminals, respectively, in a partial region thereof,
the cylindrical insulator includes the cylindrical wound resistive element, the first and second cap terminals, and the first and second rings, so that a step is formed in a radial direction of the cylindrical insulator, and first and second end portions as end ends of the resistive wire are connected to outer side surfaces of the first and second cap terminals exposed from the first and second rings, respectively.
2. The resistor of claim 1 wherein the first and second rings are formed to be shallower than a depth of the first and second cap terminals in a length direction of the resistive element.
3. A resistor according to claim 1 or 2 wherein the first and second rings include stops for engaging respective end faces or peripheral portions of the first and second cap terminals.
4. The resistor according to claim 1 or 2, wherein first and second leads are connected to end faces of the first and second cap terminals.
5. The resistor according to claim 3, wherein first and second leads are connected to end faces of the first and second cap terminals.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017018616A JP2018125489A (en) | 2017-02-03 | 2017-02-03 | Resistor |
| JP2017-018616 | 2017-02-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108389667A CN108389667A (en) | 2018-08-10 |
| CN108389667B true CN108389667B (en) | 2020-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810077027.9A Active CN108389667B (en) | 2017-02-03 | 2018-01-26 | Resistor with a resistor element |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2018125489A (en) |
| CN (1) | CN108389667B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2160978Y (en) * | 1993-04-12 | 1994-04-06 | 陕西华星线绕电阻器厂 | Large-power wire-wound resistor |
| CN2364537Y (en) * | 1999-01-27 | 2000-02-16 | 刘少峰 | Protective high-power wire wound resistor |
| CN103843078A (en) * | 2011-09-29 | 2014-06-04 | 兴亚株式会社 | Ceramic resistor |
| CN104781891A (en) * | 2012-11-09 | 2015-07-15 | 斯玛特电子公司 | Resistor and method for manufacturing same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS496443U (en) * | 1972-04-20 | 1974-01-19 | ||
| JPS5314908Y2 (en) * | 1973-09-06 | 1978-04-20 | ||
| JPS57168202U (en) * | 1981-04-16 | 1982-10-23 | ||
| DE3619212A1 (en) * | 1986-06-07 | 1987-12-10 | Philips Patentverwaltung | PASSIVE ELECTRICAL COMPONENT |
| JP2002246204A (en) * | 2001-02-19 | 2002-08-30 | Koa Corp | Wire wound resistor |
-
2017
- 2017-02-03 JP JP2017018616A patent/JP2018125489A/en active Pending
-
2018
- 2018-01-26 CN CN201810077027.9A patent/CN108389667B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2160978Y (en) * | 1993-04-12 | 1994-04-06 | 陕西华星线绕电阻器厂 | Large-power wire-wound resistor |
| CN2364537Y (en) * | 1999-01-27 | 2000-02-16 | 刘少峰 | Protective high-power wire wound resistor |
| CN103843078A (en) * | 2011-09-29 | 2014-06-04 | 兴亚株式会社 | Ceramic resistor |
| CN104781891A (en) * | 2012-11-09 | 2015-07-15 | 斯玛特电子公司 | Resistor and method for manufacturing same |
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| Publication number | Publication date |
|---|---|
| CN108389667A (en) | 2018-08-10 |
| JP2018125489A (en) | 2018-08-09 |
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