Resistance element and resistor

Abstract

To provide a resistance element and a resistor capable of reducing the peeling force generated at a welding point where an end of a resistance wire is welded to a cap terminal.SOLUTION: A resistance element 2 includes a resistor 21 having a columnar main body portion 211 and a pair of attached portions 213 located on both sides of the longitudinal direction of the main body portion 211, a pair of cap terminals 22 respectively attached to the pair of attached portions 213, and a resistance wire 24 wound around the outer peripheral surface of the main body portion 211, the cap terminal 22 has a weldable region 222 to which an end 242 of the resistance wire 24 is welded, there is a height difference between the weldable region 222 and the outer peripheral surface of the main body portion 211, and an intermediate portion 214a is provided between the main body portion 211 and one of the cap terminals 22a, and when viewed from the front, the outer peripheral surface of the intermediate portion 214a coincides with the outer peripheral surface of the attached portion 213.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a resistive element and a resistor. [Background technology]

[0002] Patent Document 1 discloses a resistance element including an insulator, a pair of cap terminals provided on both ends of the insulator, and a resistance wire whose ends are welded to the cap terminals and wound around the insulator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-95529 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the resistance element described in Patent Document 1, due to the difference in height between the cap terminal and the insulator, a peeling force (hereinafter simply referred to as the peeling force) is generated at the welding point where the end of the resistance wire is welded to the cap terminal in a direction that tries to peel the end of the resistance wire from the cap terminal, which may reduce the welding strength.

[0005] The present invention has been made in consideration of this problem, and aims to provide a resistance element and resistor that can reduce the peeling force that occurs at the welding point where the end of the resistance wire is welded to the cap terminal. [Means for solving the problem]

[0006] According to one aspect of the present invention, a resistor is provided having a columnar main body portion and a pair of attached portions located on both longitudinal sides of the main body portion, a pair of cap terminals attached to each of the pair of attached portions, a pair of terminal plates provided on each of the pair of cap terminals, and a resistance wire wound around the outer peripheral surface of the main body portion, wherein the cap terminals have a weldable area where an end of the resistance wire is welded, there is a height difference between the weldable area and the outer peripheral surface of the main body portion, an intermediate portion is provided between the main body portion and one of the cap terminals, and when viewed from the front, the intermediate portion has an outer peripheral surface that coincides with the outer peripheral surface of the attached portions or protrudes from the outer peripheral surface of the attached portions so as to be contained within the main body portion. Effect of the Invention

[0007] According to the aspect of the present invention, it is possible to reduce the peeling force that occurs at the welded portion where the end of the resistance wire is welded to the cap terminal. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an exploded view of the resistor according to the present embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. 3 is a side view of the resistance element according to the present embodiment. [Figure 4] FIG. 4 is a front view of the resistor. [Diagram 5] FIG. 5 is a front view of the resistance element with the resistance wire omitted. [Figure 6] FIG. 6 is a side view of a resistance element according to a first modified example. [Figure 7] FIG. 7 is a side view of a resistance element according to a second modification. [Figure 8] FIG. 8 is a perspective view of a resistance element according to a third modified example. [Figure 9] FIG. 9 is a perspective view of a resistance element according to a fourth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention (hereinafter, simply referred to as an embodiment) will be described with reference to the accompanying drawings. In this specification, the same elements are designated by the same reference numerals throughout.

[0010] First, the configuration of a resistor 1 according to this embodiment will be described with reference to FIGS.

[0011] Fig. 1 is an exploded view of a resistor 1 according to this embodiment. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Fig. 3 is a side view of a resistance element 2 according to this embodiment. Fig. 4 is a front view of a resistor 21. Fig. 5 is a front view of the resistance element 2 with the resistance wire 24 omitted.

[0012] 1 to 5, the resistor 1 includes a resistive element 2, a box-shaped case 3 that houses a part of the resistive element 2 (i.e., a resistor 21, which will be described later, and the like), and a cement material 4 (see FIG. 3) that serves as a sealant that seals the case 3 with the part of the resistive element 2 housed in the case 3. In this embodiment, the resistor 1 is used for precharging electric vehicles, hybrid vehicles, and the like.

[0013] 1, the case 3 is a top-open box type case made of ceramics etc. In this embodiment, the case 3 is made of ceramics etc. However, the case 3 is not limited to this and may be made of, for example, a resin material, alumina or a metal material.

[0014] 1, the resistance element 2 includes a resistor 21, a pair of cap terminals 22, a pair of terminal plates 23, and a resistance wire 24. Each pair of terminal portions is composed of a pair of cap terminals 22 and a pair of terminal plates 23.

[0015] Resistor 21 is an insulator and is made of an insulating material such as ceramics. As shown in Fig. 1 to Fig. 3, resistor 21 has a prismatic (specifically, rectangular pillar-like / more specifically, square pillar-like) main body 211 and a pair of cylindrical protrusions 212 protruding from both ends of main body 211 in the longitudinal direction (hereinafter also simply referred to as the longitudinal direction).

[0016] 4, the main body 211 has a pair of side planes 211a and 211b as side surfaces facing each other, a top plane 211c as a top surface facing each other so as to be perpendicular to the pair of side planes 211a and 211b, and a bottom plane 211d as a bottom surface. From the viewpoint of making it easy to wind the resistance wire 24 around the outer periphery of the main body 211, it is preferable that R surfaces be formed at the four corners of the main body 211.

[0017] The pair of protrusions 212 are integrally formed with the main body 211 to constitute the resistor 21. One protrusion 212a and the other protrusion 212b are formed to have the same shape and dimensions. One protrusion 212a (the protrusion 212a located on the left side of FIG. 2) constitutes both one mounted portion 213a and the middle portion 214a. On the other hand, the other protrusion 212b (the protrusion 212b located on the right side of FIG. 2) constitutes only the other mounted portion 213b.

[0018] 4, a step is formed between main body 211 and protruding portion 212, which is made up of end surface 211e (end portion) of main body 211 exposed from protruding portion 212. In front view, protruding portion 212 is provided so that the center of protruding portion 212 and the center of main body 211 coincide with each other and is accommodated within main body 211.

[0019] As shown in Figs. 1 to 3 and 5, the pair of cap terminals 22 are respectively attached to a pair of attached portions 213a, 213b. Specifically, one cap terminal 22a and the other cap terminal 22b are respectively attached to one attached portion 213a and the other attached portion 213b. In this embodiment, the pair of cap terminals 22 are a pair of metal cap terminals configured in a cylindrical shape with a bottom. The pair of cap terminals 22 are made of, for example, iron or copper. The one cap terminal 22a and the other cap terminal 22b are formed to have the same shape and the same dimensions.

[0020] As shown in Figures 2 and 3, when the one cap terminal 22a is attached to the one protruding portion 212a (one of the attached portions 213a) so that the inner surface of the bottom wall of the one cap terminal 22a and the end face of the one protruding portion 212a (one of the attached portions 213a) do not abut (i.e., a gap is provided between the inner surface of the bottom wall of the one cap terminal 22a and the end face of the one protruding portion 212a), the one protruding portion 212a has the one attached portion 213a which is covered by the one cap terminal 22a, and an intermediate portion 214a which is exposed from the one cap terminal 22a.

[0021] As a result, one of the protruding portions 212a constitutes both the one of the mounting portions 213a and the intermediate portion 214a, so that the intermediate portion 214a can be easily constructed compared to a structure in which the intermediate portion is constructed from a member other than the one of the protruding portions 212a.

[0022] In this embodiment, the outer circumferential surface of the intermediate portion 214a and the outer circumferential surface of the one mounted portion 213a are the same surface (specifically, the same circumferential surface). In other words, the outer circumferential surface of the intermediate portion 214a and the outer circumferential surface of the one mounted portion 213a are coincident. Note that the longitudinal length of the one mounted portion 213a and the longitudinal length of the intermediate portion 214a are variable.

[0023] As shown in FIG. 3, the intermediate portion 214a is located between one end face of the main body portion 211 and the opening of one cap terminal 22a (specifically, the end face located at the opening of the cap terminal 22).

[0024] The depth of the cap terminal 22 (the longitudinal dimension from the end face located at the opening of the cap terminal 22 to the inner surface of the bottom wall) is equal to the longitudinal length of the other protruding portion 212b (or one protruding portion 212a). As a result, as shown in Fig. 2 and Fig. 3, when the other cap terminal 22b is attached to the other protruding portion 212b (the other mounted portion 213b) so that the inner surface of the bottom wall of the other cap terminal 22b and the end face of the other protruding portion 212b (the other mounted portion 213b) abut against each other (i.e., no gap is provided between the inner surface of the bottom wall of the other cap terminal 22b and the end face of the other protruding portion 212b), no intermediate portion is formed between the other cap terminal 22b and the main body portion 211. As a result, the other protruding portion 212b is entirely covered by the other cap terminal 22b (i.e., the other protruding portion 212b is not exposed from the other cap terminal 22b), and therefore constitutes only the other mounted portion 213b. Note that the depth of the cap terminal 22 does not need to be completely consistent with the longitudinal length of the other protruding portion 212b (or one protruding portion 212a), and a clearance is allowed within a range required for manufacturing. Also, the fact that no intermediate portion is formed between the other cap terminal 22b and the main body portion 211 does not exclude a clearance (room) that takes into account dimensional variations in product design.

[0025] Each cap terminal 22 has a peripheral wall 221 formed to a uniform thickness d. The thickness d of the peripheral wall 221 is formed to be larger than the minimum height h of the step (i.e., the minimum distance between the outer circumferential surface of the mounted portions 213a, 213b and the outer circumferential surface of the main body portion 211 / see FIG. 2). Specifically, the minimum height h of the step is ⅓ or more of the thickness d of the peripheral wall 221 and smaller than the thickness d of the peripheral wall 221.

[0026] 5, when each cap terminal 22 is attached to each attached portion 213a, 213b, each cap terminal 22 has a weldable region 222 that protrudes outward from one side flat surface 211a of the main body portion 211. That is, there is a height difference between the outer circumferential surface of the main body portion 211 and the weldable region 222 of the cap terminal 22. Note that, in this embodiment, the weldable region 222 protrudes outward from one side flat surface 211a of the main body portion 211, but is not limited thereto, and may protrude outward from, for example, the other side flat surface 211b, the top flat surface 211c, or the bottom flat surface 211d of the main body portion 211.

[0027] 1 to 3 and 5, the pair of terminal plates 23 are provided on the pair of cap terminals 22, respectively. The pair of terminal plates 23 are made of conductive metal plates. Specifically, the pair of terminal plates 23 are made of, for example, iron or copper.

[0028] The interval L1 between the pair of terminal plates 23 is greater than the length L2 in the longitudinal direction of the main body 211. This ensures the presence (longitudinal length) of the intermediate portion 214a exposed from one of the cap terminals 22a. Furthermore, by adjusting the longitudinal length of the intermediate portion 214a (or the longitudinal length of one of the mounted portions 213a), the interval L1 between the pair of terminal plates 23 can be adjusted to be constant. As a result, it is possible to suppress variations in the interval L1 between the terminal plates 23 caused by variations in the dimensions of the resistor 21 made of an insulator such as sintered ceramics.

[0029] In the present embodiment, the pair of terminal plates 23 are integrally formed with the pair of cap terminals 22, but this is not limiting and, for example, the pair of terminal plates 23 may be joined to the pair of cap terminals 22 by welding or the like. The pair of terminal plates 23 may be provided with protrusions for positioning parts of the pair of terminal plates 23 within the case 3.

[0030] The resistance wire 24 is made of a conductive metal wire material. Specifically, the resistance wire 24 is made of, for example, a nickel-iron alloy (Ni-Fe), a copper-nickel alloy (Cu-Ni), nickel (Ni), chromium (Cr), a nickel-chromium alloy (Ni-Cr), or the like.

[0031] 1 and 3, the resistance wire 24 has a winding portion 241 and two ends 242 (a start end and an end end) located at both ends of the winding portion 241. The winding portion 241 of the resistance wire 24 is wound around the outer circumferential surface of the main body portion 211 so that the end 242 is fixed to the weldable region 222 by welding. Note that the winding portion 241 is wound around the outer circumferential surface of the main body portion 211 so that the interval (pitch) between adjacent resistance wires is constant, whereas a predetermined angle (greater than zero) is formed between the end 242 and the adjacent resistance wire.

[0032] As described above, the weldable region 222 protrudes outward from one side plane 211a of the main body portion 211. Therefore, by winding the resistance wire 24 from the weldable region 222 (i.e., a high position / outer position) to the outer peripheral surface of the main body portion 211 (i.e., a low position / inner position), the load in the peeling direction (see arrow R in Figure 1; specifically, in the radial direction perpendicular to the weldable region 222) on the welding point where the end portion 242 and the weldable region 222 are welded can be alleviated.

[0033] As described above, since the thickness d of the peripheral wall 221 is formed to be larger than the minimum height h of the step, the dimensions of the resistor 21 in the width direction and height direction after winding are less affected by the diameter of the resistance wire 24, compared to when the thickness d of the peripheral wall 221 is equal to or smaller than the minimum height h of the step. This is because, if the minimum height h of the step is larger than the thickness d of the peripheral wall 221, the only way to change the resistance value without changing the dimensions of the main body 211 is to change the diameter of the resistance wire 24, and the outermost diameter of the resistor 21 is affected by the difference in the diameter of the resistance wire 24, which changes the dimensions of the entire resistor 21 in the width direction and height direction, resulting in contact with the case 3 or other design defects.

[0034] As shown in Fig. 3, the end 242 of the resistance wire 24 is welded from the main body 211 to the weldable region 222 via the intermediate portion 214a. By providing the intermediate portion 214a between the main body 211 and one of the cap terminals 22a as described above, it is possible to ensure a gap between the end face 211e of the main body 211 and the end face located at the opening of one of the cap terminals 22a. Therefore, compared to a structure in which no intermediate portion is provided between the main body 211 and one of the cap terminals 22a, it is possible to more reduce the peeling force generated at the welding point where the end 242 of the resistance wire 24 is welded to the weldable region 222 of one of the cap terminals 22a due to the height difference between the outer circumferential surface of the main body 211 and the weldable region 222 of one of the cap terminals 22a. Note that the winding portion 241 of the resistance wire 24 is not wound around the intermediate portion 214a.

[0035] In addition, in a structure in which no intermediate portion is provided between the main body portion 211 and one of the cap terminals 22a, there is a height difference between the outer peripheral surface of the main body portion 211 and the weldable area 222 of one of the cap terminals 22a, and an impact occurs when the end of the resistance wire 24 is welded and cut, causing the resistance wire 24 to rewind (loosen or shrink), and there is a risk that the resistance wires 24 (especially the resistance wires closest to the end 242 of the winding portion 241) will come into contact with each other.

[0036] 2 and 3, by providing the intermediate portion 214a as a stopper between the main body portion 211 and one of the cap terminals 22a, it is possible to secure a gap between the end face 211e of the main body portion 211 and the end face located at the opening of one of the cap terminals 22a, and it is possible to suppress the height difference between the outer circumferential surface of the main body portion 211 and the weldable region 222 of one of the cap terminals 22a and the rewinding of the resistance wire 24 due to the impact when welding and cutting the end of the resistance wire 24, thereby reducing the risk of contact between the resistance wires 24. In particular, the rewinding of the resistance wire 24 is likely to occur at the end (end of winding) of the end 242 of the resistance wire 24, and forming the intermediate portion 214a on the end side of the resistance wire 24 contributes to reducing the risk of contact between the resistance wires 24.

[0037] In the present embodiment, the structure (FIGS. 1 to 3) in which the winding portion 241 of the resistance wire 24 is not wound around the intermediate portion 214a has been described, but the winding portion 241 of the resistance wire 24 may be wound around the intermediate portion 214a. For example, by shortening the length of the main body portion 211 and securing the length of the intermediate portion 214 compared to FIG. 1 to FIG. 3, the winding portion 241 of the resistance wire 24 is wound around both the intermediate portion 214a and the main body portion 211. Since the resistance value is adjusted by the number of turns of the resistance wire, etc., the weldable region 222 is not necessarily located at a higher position than the main body portion 211. However, by winding the winding portion 241 around the intermediate portion 214a, which is located at a lower position and has a smaller diameter than the weldable region 222, the peeling force (arrow R) can be alleviated. The winding portion 241 of the resistance wire 24 does not have to be wound around the intermediate portion 214a less than one turn.

[0038] (Modification) Next, a resistance element 2 according to a modification will be described with reference to Fig. 6 to Fig. 9. Note that in the modification, points that are the same as those in the above-mentioned embodiment will be omitted, and points that are different from the above-mentioned embodiment will be mainly described.

[0039] Fig. 6 is a side view of a resistance element 2 according to a first modified example. Fig. 7 is a side view of a resistance element 2 according to a second modified example, in which the resistance wire 24 is omitted and the terminal portion is indicated by a dashed line. Fig. 8 is a perspective view of a resistance element 2 according to a third modified example. Fig. 9 is a perspective view of a resistance element 2 according to a fourth modified example.

[0040] In the above-described embodiment, the intermediate portion is composed only of the intermediate portion 214a located between the main body portion 211 and one of the cap terminals 22a, but this is not limited to this, and for example, as shown in FIG. 6, the intermediate portion may be composed of one intermediate portion 214a located between the main body portion 211 and one of the cap terminals 22a and the other intermediate portion 214b located between the main body portion 211 and the other cap terminal 22b.

[0041] In this case, one intermediate portion 214a and the other intermediate portion 214b are formed to have the same shape and the same dimensions (i.e., the longitudinal lengths are the same). One intermediate portion 214a and the other intermediate portion 214b may be formed to have the same shape but different dimensions (i.e., the longitudinal lengths are different).

[0042] In the above-described embodiment, the cap terminal 22 is configured so that its depth matches the longitudinal length of one of the protrusions 212a, but this is not limited thereto, and for example, the depth may be configured so as to be smaller than the longitudinal length of one of the protrusions 212a.

[0043] In other words, the length in the longitudinal direction of one of the protruding portions 212a is greater than the depth of the cap terminal 22. This ensures the presence (longitudinal length) of the middle portion 214a exposed from one of the cap terminals 22a.

[0044] When one cap terminal 22a is attached to one of the protruding portions 212a (one of the mounted portions 213a) so that the inner surface of the bottom wall of one cap terminal 22a abuts against the end face of one of the protruding portions 212a (one of the mounted portions 213a), the longitudinal length of one of the mounted portions 213a is at its maximum, but the longitudinal length of the intermediate portion 214a is at its minimum.

[0045] In the above-described embodiment, the intermediate portion is configured so that its outer circumferential surface coincides with the outer circumferential surface of the mounted portion 213, but is not limited thereto, and may be configured as intermediate portion 214 whose outer circumferential surface protrudes from the outer circumferential surface of mounted portion 213 so as to fit within main body portion 211, as shown in Fig. 7. Here, "the intermediate portion 214 fits within main body portion 211" means that the outer circumferential surface of intermediate portion 214 is located inside the outer circumferential surface of main body portion 211 in front view.

[0046] In this modification, the intermediate portion 214 and the mounted portion 213 are formed coaxially. The diameter of the intermediate portion 214 is formed to be larger than the diameter of the mounted portion 213. The end face located at the opening of the cap terminal 22 is configured to be able to abut against the end face of the intermediate portion 214. As a result, the intermediate portion 214 is not covered by the cap terminal 22, and the existence (longitudinal length) of the intermediate portion 214 can be secured.

[0047] Further, as shown in FIG. 7, the intermediate portion 214 is located on both end sides of the main body portion 211, however, this is not limited thereto, and for example, the intermediate portion 214 may be located on one end side of the main body portion 211.

[0048] Further, in the above-described embodiment, the main body 211 is formed in a rectangular columnar shape, but is not limited thereto. For example, the main body 211 may be formed in an octagonal columnar shape as shown in FIG. 8, or in a circular columnar shape as shown in FIG. 9.

[0049] In addition, in the above-described embodiment, the cap terminal 22 is configured so that the weldable region 222 protrudes outward from the outer peripheral surface of the main body portion 211, but this is not limited to this, and for example, as shown in Figures 8 and 9, the weldable region 222 may be configured so that it is contained within the main body portion 211 when viewed from the front.

[0050] In this case, similarly to the above-described embodiment, there is a height difference between the weldable region 222 of the cap terminal 22 and the outer circumferential surface of the main body portion 211.

[0051] (Action and effect) Next, the effects of the embodiment and the modified example will be described.

[0052] The resistance element 2 according to the above-described embodiment includes a resistor 21 having a columnar main body portion 211 and a pair of mounted portions 213 located on both sides of the main body portion 211 in the longitudinal direction, a pair of cap terminals 22 mounted on the pair of mounted portions 213, a pair of terminal plates 23 provided on the pair of cap terminals 22, and a resistance wire 24 wound around the outer circumferential surface of the main body portion 211, the cap terminal 22 having a weldable region 222 to which an end 242 of the resistance wire 24 is welded, there is a height difference between the weldable region 222 and the outer circumferential surface of the main body portion 211, an intermediate portion 214a is provided between the main body portion 211 and one of the cap terminals 22a, and in a front view, the outer circumferential surface of the intermediate portion 214a coincides with the outer circumferential surface of the mounted portion 213 or protrudes from the outer circumferential surface of the mounted portion 213 so as to be contained within the main body portion 211.

[0053] The resistor 1 according to the above embodiment includes the above-mentioned resistive element 2 and a case 3 in which the resistive element 2 is housed.

[0054] In the above-described embodiment, the intermediate portion 214a is located between the end surface 211e (end portion) of the main body portion 211 and the opening of one of the cap terminals 22.

[0055] According to these configurations, by providing the intermediate portion 214a between the main body portion 211 and the one cap terminal 22a, a gap can be secured between the end face 211e of the main body portion 211 and the end face located at the opening of the one cap terminal 22a, so that the peeling force generated at the welded portion where the end 242 of the resistance wire 24 is welded to the weldable region 222 of the one cap terminal 22a due to the height difference between the outer circumferential surface of the main body portion 211 and the weldable region 222 of the one cap terminal 22a can be more mitigated compared to a structure in which no intermediate portion is provided between the main body portion 211 and the one cap terminal 22a. As a result, the pulse resistance of the resistor 1 is improved, the long-term stability is improved, and the mechanical strength (vibration resistance and impact resistance) is improved.

[0056] In addition, by providing the intermediate portion 214a as a stopper between the main body portion 211 and one of the cap terminals 22a, a gap can be secured between the end face 211e of the main body portion 211 and the end face located at the opening of one of the cap terminals 22a, so that rewinding of the resistance wire 24 due to the difference in height between the outer peripheral surface of the main body portion 211 and the weldable area 222 of one of the cap terminals 22a can be suppressed, thereby reducing the risk of contact between the resistance wires 24.

[0057] In the above-described embodiment, the distance between the pair of terminal boards 23 is greater than the length of the main body portion 211 in the longitudinal direction.

[0058] This configuration ensures the presence (longitudinal length) of the intermediate portion 214a exposed from one cap terminal 22a. In addition, by adjusting the longitudinal length of the intermediate portion 214a (or the longitudinal length of one mounted portion 213a), the interval L1 between the pair of terminal plates 23 can be made constant. As a result, it is possible to suppress variation in the interval L1 between the terminal plates 23 caused by dimensional variation of the resistor 21 made of an insulator such as sintered ceramics.

[0059] In addition, in the above-mentioned modified example, when the outer peripheral surface of the intermediate portion 214a coincides with the outer peripheral surface of the mounted portion 213a when viewed from the front, the sum of the longitudinal length of the intermediate portion 214a and the longitudinal length of the mounted portion 213a is greater than the depth of the cap terminal 22.

[0060] The presence (length in the longitudinal direction) of the intermediate portion 214a exposed from one cap terminal 22a can be ensured.

[0061] In the above-described modified example, an intermediate portion 214b is provided between the other main body portion 211 and the other mounted portion 213b.

[0062] According to this configuration, by providing the other intermediate portion 214b between the main body portion 211 and the other cap terminal 22b, a gap can be secured between the end face 211e of the main body portion 211 and the end face located at the opening of the other cap terminal 22b. Therefore, compared to a structure in which no intermediate portion is provided between the main body portion 211 and the other cap terminal 22b, the peeling force generated at the welding point where the end portion 242 of the resistance wire 24 is welded to the weldable area 222 of the other cap terminal 22b due to the height difference between the outer peripheral surface of the main body portion 211 and the weldable area 222 of the other cap terminal 22b can be more effectively mitigated.

[0063] In addition, by providing the other intermediate portion 214b as a stopper between the main body portion 211 and one of the cap terminals 22b, a gap can be secured between the end face 211e of the main body portion 211 and the end face located at the opening of the other cap terminal 22b, so that rewinding of the resistance wire 24 due to the difference in height between the outer peripheral surface of the main body portion 211 and the weldable area 222 of the other cap terminal 22b can be suppressed, thereby reducing the risk of contact between the resistance wires 24.

[0064] Although the present embodiment has been described above, the above embodiment merely illustrates some of the application examples of the present invention, and is not intended to limit the technical scope of the present invention to the specific configurations of the above embodiment. [Explanation of symbols]

[0065] 2. Resistance element 21 Resistor 22 Cap terminal 23 Terminal board 24 Resistance Line 211 Main body 213 Attached part 214a Middle part 222 Weldable Area

Claims

1. A resistor having a columnar body and a pair of mounting parts located on both sides of the body in a longitudinal direction; A pair of cap terminals attached to the pair of mounting portions, respectively; A pair of terminal plates provided on each of the pair of cap terminals; A resistance wire wound around the outer circumferential surface of the main body, the cap terminal has a weldable area to which an end of the resistance wire is welded; There is a height difference between the weldable region and an outer circumferential surface of the main body, an intermediate portion is provided between the main body portion and one of the cap terminals; When viewed from the front, the intermediate portion has an outer circumferential surface that coincides with an outer circumferential surface of the mounted portion, or the outer circumferential surface of the intermediate portion protrudes from the outer circumferential surface of the mounted portion so as to be contained within the main body portion. Resistance element.

2. The intermediate portion is located between an end surface of the main body portion and an opening of one of the cap terminals. The resistor element according to claim 1 .

3. The distance between the pair of terminal plates is greater than the length of the main body in the longitudinal direction. The resistor element according to claim 1 .

4. When an outer circumferential surface of the intermediate portion coincides with an outer circumferential surface of the mounted portion in a front view, a total length of a longitudinal direction of the intermediate portion and a longitudinal direction of the mounted portion is greater than a depth of the cap terminal. The resistor element according to claim 1 .

5. The intermediate portion is provided between the other main body portion and the other mounted portion. The resistor element according to claim 1 .

6. A resistor element according to any one of claims 1 to 5, A case in which the resistance element is housed. resistor.

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