JPS6344961Y2

JPS6344961Y2 -

Info

Publication number: JPS6344961Y2
Application number: JP1982082507U
Authority: JP
Priority date: 1982-06-03
Filing date: 1982-06-03
Publication date: 1988-11-22
Also published as: JPS58184804U

Description

【考案の詳細な説明】本考案は３端子型のチツプ型可変抵抗器に関す
るものである。[Detailed Description of the Invention] The present invention relates to a three-terminal chip type variable resistor.

第１図は従来のチツプ型可変抵抗器を示す図で
あり、第１図Ａは平面図、第１図Ｂは第１図Ａの
Ｙ−Y′に沿つた断面図である。図中基板１には
３つの突出部４ａ，４ｂ，４ｃが設けられてお
り、基板１の表面に設けられた半円形帯状の抵抗
体８の両端に接続した電極４０ａ，４０ｃが突出
部４０ａ，４０ｃまで夫々延出し、支持軸９に貫
装された抵抗体８上を摺動する摺動子３と導通し
た中間電極４０ｂが突出部４ｂまで延出してい
る。 FIG. 1 is a diagram showing a conventional chip type variable resistor, with FIG. 1A being a plan view and FIG. 1B being a sectional view taken along Y--Y' in FIG. 1A. In the figure, the substrate 1 is provided with three protrusions 4a, 4b, and 4c. 40c, intermediate electrodes 40b electrically connected to the slider 3 sliding on the resistor 8 inserted through the support shaft 9 extend to the protruding portion 4b.

しかしながら、この様な構成では、基板の一方
側に３つの電極が並んでいる為、基板裏面で電極
を形成した場合、可変抵抗器裏面が平担でなくな
り回路基板に装着した場合傾いてしまい、電極の
半田付が基板の一方の辺でのみ行なわれる為堅固
になされない。そして、小型化した場合、一列に
並んだ３つの電極が互いに接近して半田付けの際
短絡不良が生じ易く又、２端子型に比較して端子
が１つ多い為小型化が難しくなつていた。 However, in this type of configuration, because the three electrodes are lined up on one side of the board, if the electrodes are formed on the back side of the board, the back side of the variable resistor will not be flat and will tilt when mounted on a circuit board, and the electrodes will be soldered only on one side of the board, making it unsturdy. Furthermore, when miniaturized, the three electrodes lined up in a row will be close to each other, making it easy for short circuits to occur during soldering, and since there is one more terminal than in the two-terminal type, miniaturization is difficult.

本考案は上記問題点を解決したものであり半田
付が確実に行なわれ、電極の短絡、不良の起り難
く、小型化に有利で且つ半田付時フラツクスの流
れを防止したチツプ型可変抵抗器を提供すること
を目的とする。以下図面と共にその実施例につい
て説明する。 The present invention solves the above problems, and provides a chip type variable resistor that can be soldered reliably, is less prone to electrode short-circuits and defects, is advantageous for downsizing, and prevents flux flow during soldering. The purpose is to provide. Examples thereof will be described below with reference to the drawings.

第２図は本考案になるチツプ型可変抵抗器の実
施例を示す図であり、第２図Ａは平面図、第２図
Ｂは第２図ＡのＹ−Ｙ線に沿つた断面図、第２図
Ｃは底面図である。 FIG. 2 is a diagram showing an embodiment of the chip type variable resistor according to the present invention, FIG. 2A is a plan view, FIG. 2B is a sectional view taken along the Y-Y line of FIG. 2A, FIG. 2C is a bottom view.

図中、セラミツク等から成る基板１は、表面に
半円形の帯状抵抗体８が設けられ、その両端に導
通した一対の電極４０ａ，４０ｃは、基板１の端
部の突出部４ａ，４０を通つて基板１の裏面まで
延出している。 In the figure, a substrate 1 made of ceramic or the like is provided with a semicircular strip resistor 8 on its surface, and a pair of electrodes 40a, 40c connected to both ends of the substrate 1 pass through protrusions 4a, 40 at the ends of the substrate 1. It extends to the back surface of the substrate 1.

導電材から成る摺動子３とスペーサー７は基板
１の中心孔５に枢支された支持軸９に貫装され、
支持軸９は座ぐり部６で変形ワツシヤ１０をかし
めている。又、支持軸９と摺動子３とは一体的に
回動し、支持軸９のネジ溝９ａをドライバー等で
回動させれば摺動子３の摺動部３ａが基板１の抵
抗体８上を摺動して抵抗値が可変される。 A slider 3 and a spacer 7 made of a conductive material are passed through a support shaft 9 that is pivotally supported in a center hole 5 of a substrate 1.
The support shaft 9 caulks the deformable washer 10 at the counterbore portion 6. Further, the support shaft 9 and the slider 3 rotate integrally, and when the screw groove 9a of the support shaft 9 is rotated with a screwdriver etc., the sliding portion 3a of the slider 3 is connected to the resistor of the substrate 1. 8 to change the resistance value.

基板１自体には中間電極は形成されず、変形ワ
ツシヤ１０の舌片１０ｂが延出して一対の電極４
０ａ，４０ｃの形成された基板端部と中心孔５を
挾んで対向する基板端部で側面沿いに曲折して中
間電極４０ｂを形成している。 No intermediate electrode is formed on the substrate 1 itself, and the tongue pieces 10b of the deformed washer 10 extend to form a pair of electrodes 4.
An intermediate electrode 40b is formed by bending along the side surface at an end of the substrate opposite to the end of the substrate where the electrodes 0a and 40c are formed, with the center hole 5 in between.

ワツシヤ１０の舌片１０ｂにはフラツクス流れ
防止の為に貫通孔１０b′が設けられている。よつ
てこのチツプ型可変抵抗器の一対の電極４０ａ，
４０ｃ及び中間電極部４０ｂを回路基板上の対応
する配線パターンへ半田付する際、ワツシヤ１０
の貫通孔１０b′により中間電極部４０b′からの座
ぐり部６内へのフラツクスの流れが阻止され、支
持軸９の回転不良の発生を防止する事ができる。
又この貫通孔１０b′はかしめ部へ半田が流れない
様にする半田切りの作用もある。 A through hole 10b' is provided in the tongue piece 10b of the washer 10 to prevent flux from flowing. Therefore, a pair of electrodes 40a of this chip type variable resistor,
40c and the intermediate electrode portion 40b to the corresponding wiring pattern on the circuit board, the washer 10
The through hole 10b' prevents the flow of flux from the intermediate electrode part 40b' into the counterbore part 6, thereby preventing the support shaft 9 from malfunctioning.
This through hole 10b' also has a solder cutting function to prevent solder from flowing to the caulked portion.

上述した本考案になるチツプ型可変抵抗器によ
れば、座ぐり部内で支持軸にかしめられたワツシ
ヤの端部を、一対の電極が形成された基板端部と
反対側の基板端部側に中間電極４０ｂ延出形成
し、且つ、この中間電極部とかしめ部との間のワ
ツシヤに貫通孔を形成する構成とした為、三つの
各電極が互いに離隔した位置に配される事にな
り、半田付時の短絡不良が起り難く、又この様な
特徴を保持して２端子型のものと同形状の基板を
使用可能であり、２端子型のものと同程度の小形
の３端子型のチツプ型可変抵抗器を実現できる。
又、回路基板への半田付の際、中間電極部からの
フラツクスの流れが貫通孔により阻止され、支持
軸の回転のスムーズ性を失う事がない等の種々の
効果を有している。 According to the above-described chip type variable resistor of the present invention, the end of the washer crimped to the support shaft in the counterbore is placed on the side of the substrate end opposite to the substrate end on which the pair of electrodes are formed. Since the intermediate electrode 40b is formed to extend and a through hole is formed in the washer between the intermediate electrode part and the caulking part, the three electrodes are arranged at positions separated from each other. Short-circuit failures during soldering are less likely to occur, and while maintaining these characteristics, it is possible to use a board with the same shape as a 2-terminal type, and it is possible to use a 3-terminal type that is as small as a 2-terminal type. A chip type variable resistor can be realized.
In addition, during soldering to a circuit board, the flow of flux from the intermediate electrode portion is blocked by the through hole, which has various effects such as preventing loss of smooth rotation of the support shaft.

[Brief explanation of the drawing]

第１図は従来のチツプ型可変抵抗器を示す図、
第２図Ａは本考案の一実施例になるチツプ型可変
抵抗器の平面図、第２図Ｂは第２図ＡのＹ−Ｙ線
断面図、第２図Ｃは第２図Ａの底面図を夫々示
す。１……基板、２……絶縁皮膜、３……摺動子、
５……中心孔、６……座ぐり部、８……抵抗体、
９……支持軸、１０……ワツシヤ、１０b′……貫
通孔、４０ａ，４０ｃ……一対の電極、４０ｂ…
…中間電極。 Figure 1 shows a conventional chip type variable resistor.
Fig. 2A is a plan view of a chip type variable resistor which is an embodiment of the present invention, Fig. 2B is a sectional view taken along the Y-Y line of Fig. 2A, and Fig. 2C is a bottom view of Fig. 2A. Figures are shown respectively. 1... Substrate, 2... Insulating film, 3... Slider,
5... Center hole, 6... Counterbore, 8... Resistor,
9...Support shaft, 10...Washer, 10b'...Through hole, 40a, 40c...Pair of electrodes, 40b...
...Intermediate electrode.

Claims

[Scope of Claim for Utility Model Registration] A band-shaped resistor is formed on the surface of a substrate having a counterbore on the back side and a center hole, and conducts to both ends of the band-shaped resistor and extends to the back surface at the edge of the substrate. A pair of electrodes are formed, and an intermediate electrode portion located near an end of the substrate opposite to the end portion of the substrate on which the pair of electrodes are formed sandwiching the center hole is a sliding member that slides on the resistor. A washer is formed integrally with a washer that supports the mover and is caulked and fixed within the counterbore to a support shaft that passes through the center hole and is pivotally supported by the substrate, and is caulked and fixed within the intermediate electrode and the counterbore. A chip type variable resistor characterized in that a through hole is formed in the washer between the caulked part and the washer.