Resistor element and resistor

Abstract

The invention provides a resistor element and a resistor, which can alleviate peeling force generated at a welding part where an end part of a resistance wire is welded to a cover terminal. A resistive element (2) is provided with: a resistor (21) having a columnar main body section (211) and a pair of sections to be mounted (213) positioned on both sides of the main body section (211) in the longitudinal direction; a pair of cover terminals (22) respectively attached to the pair of attachment sections (213); and a resistance wire (24) wound around the outer peripheral surface of the main body part (211), the cover terminal (22) has a weldable region (222), an end part (242) of the resistance wire (24) is welded to the weldable region (222), there is a height difference between the weldable region (222) and the outer peripheral surface of the main body part (211), and an intermediate part (214a) is provided between the main body part (211) and one cover terminal (22a). The outer peripheral surface of the intermediate section (214a) coincides with the outer peripheral surface of the mounted section (213).

Description

Technical Field

[0001] The present invention relates to a resistance element and a resistor. Background Art

[0002] A resistance element is disclosed in Patent Document 1. The resistance element includes: an insulator; a pair of lid terminals provided at both ends of the insulator; and a resistance wire, the end of which is welded to the lid terminal and the resistance wire is wound around the insulator.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2015-95529 Summary of the Invention

[0006] Technical Problem to be Solved by the Invention

[0007] In the resistance element described in Patent Document 1, due to the height difference between the lid terminal and the insulator, at the welding portion where the end of the resistance wire is welded to the lid terminal, a peeling force (hereinafter also simply referred to as the peeling force) is generated in the direction in which the end of the resistance wire is to be peeled off from the lid terminal, and the welding strength may decrease.

[0008] The present invention has been made in view of this problem, and an object thereof is to provide a resistance element and a resistor that can alleviate the peeling force generated at the welding portion where the end of the resistance wire is welded to the lid terminal.

[0009] Solution to the Technical Problem

[0010] According to the technical solution of the present invention, there is provided a resistance element including: a resistor body having a columnar main body portion and a pair of mounted portions located on both sides of the main body portion in the long side direction; a pair of lid terminals respectively mounted on the pair of mounted portions; a pair of terminal plates respectively provided on the pair of lid terminals; and a resistance wire wound around the outer peripheral surface of the main body portion. The lid terminal has a weldable area, and the end of the resistance wire is welded to the weldable area. 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 lid terminals. When viewed in the front view, the outer peripheral surface of the intermediate portion coincides with the outer peripheral surface of the mounted portion, or the outer peripheral surface of the intermediate portion protrudes from the outer peripheral surface of the mounted portion in such a manner that the intermediate portion is incorporated into the main body portion.

[0011] Effects of the Invention

[0012] According to the technical solution of the present invention, it is possible to alleviate the peeling force generated at the welding portion where the end of the resistance wire is welded to the lid terminal. Brief Description of the Drawings

[0013] Figure 1 This is an exploded view of the resistor according to this embodiment.

[0014] Figure 2 It is along Figure 1 A cross-sectional view taken along line II-II in

[0015] Figure 3 This is a side view of the resistor element according to this embodiment.

[0016] Figure 4 This is a front view of the resistor body.

[0017] Figure 5 This is a front view of the resistor element with the resistance wire omitted.

[0018] Figure 6 This is a side view of the resistor element according to the first modification example.

[0019] Figure 7 This is a side view of the resistor element according to the second modification example.

[0020] Figure 8 This is a perspective view of the resistor element according to the third modification example.

[0021] Figure 9 This is a perspective view of the resistor element according to the fourth modification example.

[0022] Explanation of reference numerals

[0023] 2: Resistor element; 21: Resistor body; 22: Cover terminal; 23: Terminal board; 24: Resistance wire; 211: Main body portion; 213: Mounted portion; 214a: Intermediate portion; 222: Weldable area. Detailed implementation manners

[0024] Hereinafter, a mode for implementing the present invention (hereinafter also simply referred to as an embodiment) will be described with reference to the drawings. In this specification, the same reference numerals are assigned to the same elements throughout.

[0025] First, with reference to Figures 1 to 5 , the configuration of the resistor 1 according to this embodiment will be described.

[0026] Figure 1 This is an exploded view of the resistor 1 according to this embodiment. Figure 2 It is along Figure 1 A cross-sectional view taken along line II-II in Figure 3 This is a side view of the resistor element 2 according to this embodiment. Figure 4 This is a front view of the resistor body 21. Figure 5 This is a front view of the resistor element 2 with the resistance wire 24 omitted.

[0027] As shown Figures 1 to 5 in FIG. 1, the resistor 1 includes a resistance element 2, a box-shaped housing 3 that houses a part of the resistance element 2 (i.e., the resistance body 21 and the like described later), and a cement material (not shown) as a sealing material that seals the housing 3 in a state where a part of the resistance element 2 is housed in the housing 3. In addition, in the present embodiment, the resistor 1 is used for pre-charging electric vehicles, hybrid vehicles, and the like.

[0028] As shown Figure 1 in FIG. 2, the housing 3 is a top-opening box-shaped housing made of ceramics or the like. It should be noted that although the housing 3 is made of ceramics or the like in the present embodiment, it is not limited thereto, and for example, it may be made of a resin material, alumina, or a metal material.

[0029] As shown Figure 1 in FIG. 3, the resistance element 2 has a resistance body 21, a pair of cover terminals 22, a pair of terminal plates 23, and a resistance wire 24. It should be noted that each of the pair of terminal portions is composed of a corresponding cover terminal in the pair of cover terminals 22 and a corresponding terminal plate in the pair of terminal plates 23.

[0030] The resistance body 21 is an insulator and is made of an insulator such as ceramics. In addition, as shown Figures 1 to 3 in FIG. 4, the resistance body 21 has a prismatic (specifically, rectangular prismatic / more specifically, square prismatic) main body portion 211 and a pair of cylindrical protruding portions 212 protruding from both ends in the long side direction (hereinafter also simply referred to as the long side direction) of the main body portion 211.

[0031] As shown Figure 4 in FIG. 5, the main body portion 211 has a pair of side planes 211a and 211b that are opposite to each other as side surfaces, a top plane 211c that is opposite to each other in a direction orthogonal to the pair of side planes 211a and 211b as a top surface, and a bottom plane 211d as a bottom surface. Moreover, from the viewpoint of facilitating winding the resistance wire 24 around the outer periphery of the main body portion 211, it is preferable to form R surfaces at the four corners of the main body portion 211.

[0032] The pair of protruding portions 212 are integrally formed with the main body portion 211 to constitute the resistance body 21. It should be noted that one protruding portion 212a and the other protruding portion 212b are formed in the same shape and the same size. One protruding portion 212a (the protruding portion 212a located on the left side in Figure 2 ) constitutes both one mounted portion 213a and an intermediate portion 214a. On the other hand, the other protruding portion 212b (the protruding portion 212b located on the right side in Figure 2 ) only constitutes the other mounted portion 213b.

[0033] As shown Figure 4As shown, a step is formed between the main body portion 211 and the protruding portion 212, which is constituted by the end face 211e (end portion) of the main body portion 211 exposed from the protruding portion 212. When viewed from the front, the protruding portion 212 is arranged such that the center of the protruding portion 212 coincides with the center of the main body portion 211 and is incorporated within the main body portion 211.

[0034] As Figures 1 to 3 and Figure 5 shown, a pair of cover terminals 22 are respectively mounted on a pair of mounted portions 213a, 213b. Specifically, one cover terminal 22a and the other cover terminal 22b are mounted on one mounted portion 213a and the other mounted portion 213b. In the present embodiment, the pair of cover terminals 22 are a pair of metal cover terminals configured as bottomed cylindrical shapes. It should be noted that the pair of cover terminals 22 are made of, for example, iron or copper. It should be noted that one cover terminal 22a and the other cover terminal 22b are formed in the same shape and the same size.

[0035] As Figure 2 and Figure 3 shown, in a state where one cover terminal 22a is mounted on one protruding portion 212a (one mounted portion 213a) such that the inner surface of the bottom wall of the one cover terminal 22a does not contact the end face of the one protruding portion 212a (i.e., a gap is provided between the inner surface of the bottom wall of the one cover terminal 22a and the end face of the one protruding portion 212a), the one protruding portion 212a has one mounted portion 213a as the portion covered by the one cover terminal 22a and an intermediate portion 214a as the portion exposed from the one cover terminal 22a.

[0036] Thus, since the one protruding portion 212a constitutes both the one mounted portion 213a and the intermediate portion 214a, the intermediate portion 214a can be more easily formed as compared with a structure in which the intermediate portion is constituted by a component other than the one protruding portion 212a.

[0037] In the present embodiment, the outer peripheral surface of the intermediate portion 214a and the outer peripheral surface of the one mounted portion 213a are the same surface (specifically, the same circumferential surface). In other words, the outer peripheral surface of the intermediate portion 214a coincides with the outer peripheral surface of the one mounted portion 213a. It should be noted that the length of the one mounted portion 213a in the long side direction and the length of the intermediate portion 214a in the long side direction are variable.

[0038] As Figure 3 shown, the intermediate portion 214a is located between the end face of one end of the main body portion 211 and the opening of one cover terminal 22a (specifically, the end face located at the opening of the cover terminal 22).

[0039] The depth of the cover terminal 22 (the dimension in the long side direction from the end face located at the opening of the cover terminal 22 to the inner surface of the bottom wall) is the same as the length of the other protruding portion 212b (or one protruding portion 212a) in the long side direction. Thus, as Figure 2 and Figure 3 show, in a state where the other cover terminal 22b is mounted on the other protruding portion 212b (the other mounting portion 213b) such that the inner surface of the bottom wall of the other cover terminal 22b abuts against the end face of the other protruding portion 212b (i.e., there is no gap between the inner surface of the bottom wall of the other cover terminal 22b and the end face of the other protruding portion 212b), no intermediate portion is formed between the other cover terminal 22b and the main body portion 211. As a result, since the other protruding portion 212b is entirely covered by the other cover terminal 22b (i.e., the other protruding portion 212b does not protrude from the other cover terminal 22b), only the other mounting portion 213b is constituted. It should be noted that the depth of the cover terminal 22 does not have to be exactly the same as the length of the other protruding portion 212b (or one protruding portion 212a) in the long side direction, and a gap within the range required for manufacturing is allowed. In addition, the fact that no intermediate portion is formed between the other cover terminal 22b and the main body portion 211 does not exclude a gap (tolerance) designed in consideration of dimensional deviations in product design.

[0040] Each cover terminal 22 has a peripheral wall 221 formed with a uniform thickness d. Moreover, the thickness d of the peripheral wall 221 is formed to be greater than the minimum height h of the step (i.e., the minimum distance between the outer peripheral surfaces of the mounting portions 213a, 213b and the outer peripheral surface of the main body portion 211 / refer to Figure 2 ). Specifically, the minimum height h of the step is more than 1 / 3 of the thickness d of the peripheral wall 221 and less than the thickness d of the peripheral wall 221.

[0041] Thus, as Figure 5 shows, in a state where each cover terminal 22 is mounted on each of the mounting portions 213a, 213b, each cover terminal 22 has a weldable area 222 that protrudes more outward than one side plane 211a of the main body portion 211. That is, there is a height difference between the outer peripheral surface of the main body portion 211 and the weldable area 222 of the cover terminal 22. It should be noted that although in this embodiment, the weldable area 222 protrudes more outward than one side plane 211a of the main body portion 211, it is not limited thereto. For example, it may also protrude more outward than the other side plane 211b, the top plane 211c, or the bottom plane 211d of the main body portion 211.

[0042] As Figures 1 to 3 and Figure 5As shown, a pair of terminal plates 23 are respectively provided in corresponding cover terminals of a pair of cover terminals 22. The pair of terminal plates 23 are made of a conductive metal plate. Specifically, the pair of terminal plates 23 are made of, for example, iron or copper.

[0043] Moreover, the interval L1 between the pair of terminal plates 23 is larger than the length L2 of the main body portion 211 in the long side direction. Thereby, the existence (the length in the long side direction) of the intermediate portion 214a exposed from one cover terminal 22a can be ensured. In addition, by adjusting the length of the intermediate portion 214a in the long side direction (or the length of one mounted portion 213a in the long side direction), the interval L1 between the pair of terminal plates 23 can be adjusted to be constant. As a result, the deviation of the interval L1 between the terminal plates 23 caused by the dimensional deviation of the resistor body 21 can be suppressed, where the resistor body 21 is made of an insulator obtained by sintering ceramics or the like.

[0044] In addition, although in the present embodiment, the pair of terminal plates 23 are integrally formed with the corresponding cover terminals in the pair of cover terminals 22, it is not limited thereto. For example, they can also be joined to the pair of cover terminals 22 by welding or the like. In addition, protrusions for positioning a part of the pair of terminal plates 23 in the housing 3 can be provided in the pair of terminal plates 23.

[0045] The resistance wire 24 is made of a conductive metal wire. Specifically, the resistance wire 24 is made of, for example, nickel-iron alloy (Ni-Fe), copper-nickel alloy (Cu-Ni), nickel (Ni), chromium (Cr), or nickel-chromium alloy (Ni-Cr).

[0046] As Figure 1 and Figure 3 shown, the resistance wire 24 has a winding portion 241 and two end portions 242 (starting end and terminal end) located at both ends of the winding portion 241. In the resistance wire 24, the winding portion 241 is wound around the outer peripheral surface of the main body portion 211 in such a manner that the end portions 242 are fixed to the weldable region 222 by welding. It should be noted that the winding portion 241 is wound around the outer peripheral surface of the main body portion 211 with a constant interval (pitch) between adjacent resistance wires, while a predetermined angle (greater than zero) is formed between the end portion 242 and the adjacent resistance wire.

[0047] Moreover, as described above, since the weldable region 222 protrudes more outward than one side plane 211a of the main body portion 211, when the resistance wire 24 is wound from the weldable region 222 (i.e., the high position / outer position) to the outer peripheral surface of the main body portion 211 (i.e., the low position / inner position), the load in the peeling direction at the welding portion of the welding end portion 242 and the weldable region 222 can be alleviated (refer to Figure 1arrow R / specifically, the radial direction orthogonal to the weldable region 222).

[0048] 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, compared with the case where the thickness d of the peripheral wall 221 is less than or equal to the minimum height h of the step, the dimensions of the resistor body 21 in the width direction and the height direction are less likely to be affected by the diameter of the resistance wire 24 after winding. This is because, if the minimum height h of the step becomes larger relative to the thickness d of the peripheral wall 221, the diameter of the resistance wire 24 can only be changed without changing the dimensions of the main body portion 211 while changing the resistance value, and the outermost diameter of the resistor body 21 will be affected by the difference in the diameter of the resistance wire 24. Since the dimensions of the entire resistor body 21 in the width direction and the height direction will change, it will contact the housing 3 or cause design defects.

[0049] As Figure 3 shown, the end portion 242 of the resistance wire 24 is welded to the weldable region 222 from the main body portion 211 via the intermediate portion 214a. Thus, by providing the intermediate portion 214a as described above between the main body portion 211 and one lid terminal 22a, the interval between the end face 211e of the main body portion 211 and the end face located at the opening of one lid terminal 22a can be ensured. Therefore, compared with the structure in which no intermediate portion is provided between the main body portion 211 and one lid terminal 22a, the force of peeling generated at the welding portion where the end portion 242 of the resistance wire 24 is welded to the weldable region 222 of one lid terminal 22a due to the height difference between the outer peripheral surface of the main body portion 211 and the weldable region 222 of one lid terminal 22a can be further alleviated. It should be noted that there is no winding portion 241 of the resistance wire 24 on the intermediate portion 214a.

[0050] In addition, in the structure where no intermediate portion is provided between the main body portion 211 and one lid terminal 22a, there may be a height difference between the outer peripheral surface of the main body portion 211 and the weldable region 222 of one lid terminal 22a, or an impact may be generated when the end portion of the resistance wire 24 is welded and cut. Therefore, there is a risk that the resistance wire 24 will unwind (relax or contract) and the resistance wires 24 will contact each other (especially the resistance wires closest to the end portion 242 in the winding portion 241).

[0051] Therefore, as Figure 2 and Figure 3As shown, by providing an intermediate portion 214a as a stopper between the main body portion 211 and one lid terminal 22a, the interval between the end face 211e of the main body portion 211 and the end face at the opening of one lid terminal 22a can be ensured, and the unwinding of the resistance wire 24 caused by the height difference between the outer peripheral surface of the main body portion 211 and the weldable region 222 of one lid terminal 22a and the impact generated when welding and cutting the end of the resistance wire 24 can be suppressed. Therefore, the risk of the resistance wires 24 contacting each other can be reduced. In particular, at the terminal (wound end) of the end portion 242 of the resistance wire 24, the resistance wire 24 is likely to unwind. If the intermediate portion 214a is formed on the terminal side of the resistance wire 24, it helps to reduce the risk of the resistance wires 24 contacting each other.

[0052] In the present embodiment, the structure in which the winding portion 241 of the resistance wire 24 is not wound around the intermediate portion 214a has been described ( Figures 1 to 3 ), but it is also possible to adopt a structure in which the winding portion 241 of the resistance wire 24 is wound around the intermediate portion 214a. For example, compared with Figures 1 to 3 by reducing the length of the main body portion 211 and ensuring that the intermediate portion 214 is longer, the winding portion 241 of the resistance wire 24 can be 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 does not necessarily have to be at a position higher than the main body portion 211. However, by winding the winding portion 241 around the intermediate portion 214a having a diameter smaller than that of the weldable region 222 and being at a lower position, the peeling force (arrow R) can be alleviated. The winding of the winding portion 241 of the resistance wire 24 around the intermediate portion 214a may not be a full turn.

[0053] (Variant example)

[0054] Next, the resistance element 2 according to the variant example will be described with reference to Figures 6 to 9 It should be noted that in the variant example, the points that are the same as those in the above-described embodiment are omitted, and mainly the points different from the above-described embodiment will be described.

[0055] Figure 6 FIG. is a side view of the resistance element 2 according to the first variant example. Figure 7 FIG. is a side view of the resistance element 2 according to the second variant example, in which the resistance wire 24 is omitted and the terminal portion is shown by a dashed line. Figure 8 FIG. is a perspective view of the resistance element 2 according to the third variant example. Figure 9 FIG. is a perspective view of the resistance element 2 according to the fourth variant example.

[0056] In the above-described embodiment, the intermediate portion is only composed of the intermediate portion 214a located between the main body portion 211 and one lid terminal 22a, but it is not limited thereto. For example, as Figure 6As shown, it may also be composed of an intermediate portion 214a located between the main body portion 211 and one cover terminal 22a and another intermediate portion 214b located between the main body portion 211 and another cover terminal 22b.

[0057] In this case, one intermediate portion 214a and another intermediate portion 214b are formed in the same shape and in the same size (i.e., the lengths in the long side direction are the same). One intermediate portion 214a and another intermediate portion 214b may also be formed in the same shape and in different sizes (i.e., the lengths in the long side direction are different).

[0058] In the above-described embodiment, the cover terminal 22 is configured such that the depth is the same as the length of one protruding portion 212a in the long side direction, but it is not limited thereto. For example, it may also be configured such that the depth is smaller than the length of one protruding portion 212a in the long side direction.

[0059] In other words, the length of one protruding portion 212a in the long side direction is greater than the depth of the cover terminal 22. Thereby, the existence (the length in the long side direction) of the intermediate portion 214a exposed from one cover terminal 22a can be ensured.

[0060] Moreover, in a state where one cover terminal 22a is mounted on one protruding portion 212a (one mounted portion 213a) such that the inner surface of the bottom wall of one cover terminal 22a abuts against the end surface of one protruding portion 212a (one mounted portion 213a), the length of one mounted portion 213a in the long side direction is the largest, while the length of the intermediate portion 214a in the long side direction is the smallest.

[0061] In addition, in the above-described embodiment, the intermediate portion is configured such that the outer peripheral surface is the same as the outer peripheral surface of the mounted portion 213, but it is not limited thereto. For example, as Figure 7 shown, it may be composed of an intermediate portion 214, wherein the outer peripheral surface of the intermediate portion 214 protrudes from the outer peripheral surface of the mounted portion 213 in such a manner that the intermediate portion 214 is incorporated into the main body portion 211. Here, the intermediate portion 214 being incorporated into the main body portion 211 means that when viewed from the front, the outer peripheral surface of the intermediate portion 214 exists at a position more inside than the outer peripheral surface of the main body portion 211.

[0062] In this modification, the intermediate portion 214 and the mounted portion 213 are formed coaxially. In addition, the diameter of the intermediate portion 214 is formed to be larger than the diameter of the mounted portion 213. The end surface located at the opening of the cover terminal 22 is configured to be able to abut against the end surface of the intermediate portion 214. Thereby, since the intermediate portion 214 will not be covered by the cover terminal 22, the existence (the length in the long side direction) of the intermediate portion 214 can be ensured.

[0063] In addition, as Figure 7As shown, the middle part 214 is located on both end sides of the main body part 211, but is not limited thereto. For example, it may also be located on a single end side of the main body part 211.

[0064] In addition, in the above-described embodiment, the main body part 211 is formed in a rectangular column shape, but is not limited thereto. For example, it may be formed in an octagonal column shape as Figure 8 shown, or may be formed in a circular column shape as Figure 9 shown.

[0065] In addition, in the above-described embodiment, although the lid terminal 22 is configured such that the weldable area 222 protrudes more outward than the outer peripheral surface of the main body part 211, it is not limited thereto. For example, it may also be as Figure 8 and Figure 9 shown, and is configured such that when viewed from the front, the weldable area 222 is incorporated into the main body part 211.

[0066] In this case, similar to the above-described embodiment, there is a height difference between the weldable area 222 of the lid terminal 22 and the outer peripheral surface of the main body part 211.

[0067] (Function and effect)

[0068] Next, the function and effect of the embodiment and the modification will be described.

[0069] The resistor element 2 according to the above-described embodiment includes: a resistor body 21 having a columnar main body part 211 and a pair of mounting parts 213 located on both sides of the main body part 211 in the long side direction; a pair of lid terminals 22 respectively mounted on the pair of mounting parts 213; a pair of terminal plates 23 respectively provided on the pair of lid terminals 22; and a resistance wire 24 wound around the outer peripheral surface of the main body part 211. The lid terminal 22 has a weldable area 222, and the end 242 of the resistance wire 24 is welded to the weldable area 222. There is a height difference between the weldable area 222 and the outer peripheral surface of the main body part 211. An intermediate part 214a is provided between the main body part 211 and one lid terminal 22a. When viewed from the front, the outer peripheral surface of the intermediate part 214a coincides with the outer peripheral surface of the mounting part 213, or the outer peripheral surface of the intermediate part 214a protrudes from the outer peripheral surface of the mounting part 213 in such a manner that the intermediate part 214a is incorporated into the main body part 211.

[0070] The resistor 1 according to the above-described embodiment includes the above-described resistor element 2 and a housing 3 that houses the resistor element 2.

[0071] In addition, in the above-described embodiment, the intermediate part 214a is located between the end face 211e (end part) of the main body part 211 and the opening of one lid terminal 22.

[0072] According to these configurations, by providing the intermediate portion 214a between the main body portion 211 and one lid terminal 22a, it is possible to ensure the interval between the end face 211e of the main body portion 211 and the end face located at the opening of one lid terminal 22a. Therefore, compared with the structure without the intermediate portion provided between the main body portion 211 and one lid terminal 22a, the force of peeling generated at the welding portion where the end portion 242 of the resistance wire 24 is welded to the weldable area 222 of one lid terminal 22a due to the height difference between the outer peripheral surface of the main body portion 211 and the weldable area 222 of one lid terminal 22a can be further alleviated. As a result, the pulse resistance of the resistor 1 is improved, the long-term stability is improved, and the mechanical strength (vibration resistance, shock resistance) is improved.

[0073] In addition, by providing the intermediate portion 214a as a stopper between the main body portion 211 and one lid terminal 22a, it is possible to ensure the interval between the end face 211e of the main body portion 211 and the end face located at the opening of one lid terminal 22a. Therefore, the unwinding of the resistance wire 24 caused by the height difference between the outer peripheral surface of the main body portion 211 and the weldable area 222 of one lid terminal 22a can be suppressed, and thus the risk of the resistance wires 24 coming into contact with each other can be reduced.

[0074] In addition, in the above-described embodiment, the interval between the pair of terminal plates 23 is larger than the length of the main body portion 211 in the long side direction.

[0075] According to this configuration, the existence (the length in the long side direction) of the intermediate portion 214a exposed from one lid terminal 22a can be ensured. In addition, by adjusting the length of the intermediate portion 214a in the long side direction (or the length of one mounted portion 213a in the long side direction), the interval L1 between the pair of terminal plates 23 can be made constant. As a result, the deviation of the interval L1 between the terminal plates 23 caused by the dimensional deviation of the resistor body 21, which is composed of an insulator obtained by sintering ceramics or the like, can be suppressed.

[0076] In addition, in the above-described modification, 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 total length of the length of the intermediate portion 214a in the long side direction and the length of the mounted portion 213a in the long side direction is larger than the depth of the lid terminal 22.

[0077] The existence (the length in the long side direction) of the intermediate portion 214a exposed from one lid terminal 22a can be ensured.

[0078] In addition, in the above-described modification, an intermediate portion 214b is provided between the main body portion 211 and the other mounted portion 213b.

[0079] According to this configuration, since another intermediate portion 214b is provided between the main body portion 211 and the other lid terminal 22b, an interval between the end face 211e of the main body portion 211 and the end face located at the opening of the other lid terminal 22b can be ensured. Therefore, compared with the structure in which no intermediate portion is provided between the main body portion 211 and the other lid terminal 22b, the force of peeling generated at the welding portion where the end portion 242 of the resistance wire 24 is welded to the weldable region 222 of the other lid terminal 22b due to the height difference between the outer peripheral surface of the main body portion 211 and the weldable region 222 of the other lid terminal 22b can be further alleviated.

[0080] In addition, since another intermediate portion 214b serving as a stopper is provided between the main body portion 211 and the other lid terminal 22b, an interval between the end face 211e of the main body portion 211 and the end face located at the opening of the other lid terminal 22b can be ensured. Therefore, the unwinding of the resistance wire 24 caused by the height difference between the outer peripheral surface of the main body portion 211 and the weldable region 222 of the other lid terminal 22b can be suppressed, and thus the risk of the resistance wires 24 coming into contact with each other can be reduced.

[0081] The above describes the present embodiment, but the above embodiment only shows a part of the application examples of the present invention, and is not intended to limit the technical scope of the present invention to the specific configuration of the above embodiment.

Claims

1. A resistor element comprising: The resistor has a columnar main body and a pair of mounted parts located on both sides of the main body in the long side direction; A pair of cover terminals, respectively mounted on the pair of mounted portions; a pair of terminal plates, respectively disposed on the pair of cover terminals; as well as A resistance wire is wound around the outer peripheral surface of the main body. The cover terminal has a weldable area, and the end of the resistance wire is welded to the weldable area. There is a height difference between the weldable area and the outer peripheral surface of the main body, An intermediate portion is provided between the main body portion and one of the cover terminals, In front view, the outer peripheral surface of the intermediate portion coincides with the outer peripheral surface of the mounted portion, or the outer peripheral surface of the intermediate portion protrudes from the outer peripheral surface of the mounted portion in a manner that the intermediate portion is accommodated in the main body portion.

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

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

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

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

6. A resistor having: The resistor element according to any one of claims 1 to 5; and A housing for accommodating the resistor element.

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