JPH0533502U - Variable resistor - Google Patents

Abstract

(57)【要約】 【目的】 摺動子の熱かしめが弛んでも安定に動作す
る。 【構成】 ケース１１内に基板１２が固定され、基板１
２上に抵抗体１３が開リング状に形成され、その中心部
に集電体１４が形成され、ケース１１内に回転体１６が
回転自在に配され、回転体１６の底面周縁部が、ケース
１１の内周壁の受け部１５に圧接されている。摺動子２
１の一半部が回転体１６の底面に、その突起２５と小孔
２４とにより熱かしめにより固定され、他半部の端が接
触部２２として抵抗体１３と摺動接触され、この接触部
２２と反対の端部は外方へ延長されて延長部３３とさ
れ、延長部３３は回転体１６と受け部１５とに挟まれて
いる。回転体１６はＯリング２７、金属カバー２６で受
け部１５に弾性的に抑えられる。 (57) [Summary] [Purpose] The slider operates stably even if the caulking of the slider is loose. [Structure] The substrate 12 is fixed in the case 11, and the substrate 1
2, the resistor 13 is formed in an open ring shape, the current collector 14 is formed in the center thereof, the rotating body 16 is rotatably arranged in the case 11, and the bottom peripheral portion of the rotating body 16 is the case. It is pressed against the receiving portion 15 of the inner peripheral wall of the member 11. Slider 2
One half of the first half is fixed to the bottom surface of the rotating body 16 by heat staking by the projection 25 and the small hole 24, and the other half end is slidably contacted with the resistor 13 as the contact part 22. The opposite end is extended outwards to form an extension 33, and the extension 33 is sandwiched between the rotating body 16 and the receiving portion 15. The rotating body 16 is elastically held by the receiving portion 15 by the O-ring 27 and the metal cover 26.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

この考案は、ケースに回転体が収容され、回転体の底面に摺動子の一端部が対 接されて取付けられ、摺動子の他端が、ケースの内底面に形成された抵抗体と摺 動接触する可変抵抗器に関する。 In this invention, a rotating body is housed in a case, one end of a slider is attached to the bottom surface of the rotating body so as to be in contact, and the other end of the slider is a resistor formed on the inner bottom surface of the case. The present invention relates to a variable resistor that makes sliding contact.

【０００２】[0002]

【従来の技術】[Prior Art]

図２，図３に従来の可変抵抗器を示す。合成樹脂材の外形が直方体状のケース １１は上面が開放とされ、内周壁は円周面とされている。ケース１１内にその底 面と平行に絶縁基板１２が収容され、例えばケース１１に一体にモールドされて 固定され、絶縁基板１２上に開リング状の抵抗体１３が形成され、その抵抗体１ ３の内側の中心部に集電体１４が基板１２上に形成されている。ケース１１の内 周壁にリング状受け部１５が軸心方向の段部として形成されている。 2 and 3 show a conventional variable resistor. The case 11 in which the outer shape of the synthetic resin material is a rectangular parallelepiped has an open upper surface, and the inner peripheral wall is a circumferential surface. The insulating substrate 12 is housed in the case 11 in parallel with the bottom surface thereof, and is molded and fixed integrally with the case 11, for example, and the open ring-shaped resistor 13 is formed on the insulating substrate 12. A current collector 14 is formed on the substrate 12 at the center of the inside. A ring-shaped receiving portion 15 is formed on the inner peripheral wall of the case 11 as a step portion in the axial direction.

【０００３】 ケース１１内に合成樹脂材の回転体１６が軸心を中心に回転自在に収容されて いる。回転体１６は厚いディスク状をしており、底面に浅い大きな凹部が形成さ れて、その周囲に低いリング状突条１７が形成され、上面の外周部がリング状に けずられてリング状段部１８が形成され、上面の中央部に短い軸１９が一体に突 出している。A rotating body 16 made of a synthetic resin material is housed in a case 11 so as to be rotatable around an axis. The rotating body 16 has a thick disc shape, a large shallow recess is formed on the bottom surface, a low ring-shaped ridge 17 is formed around it, and the outer peripheral portion of the upper surface is displaced in a ring shape to form a ring-shaped step. A portion 18 is formed, and a short shaft 19 is integrally projected at the center of the upper surface.

【０００４】 回転体１６の底面に摺動子２１が取付けられる。摺動子は一枚の円形ばね性金 属板のプレス加工で形成され、一半部に半円形孔が形成されて、その孔の外側が 円弧状アームとされ、そのアームにその円弧に沿う複数の溝が形成され、円弧状 アームの中央部が接触部２２として抵抗体１３と摺動接触するように、このアー ムが折り曲げられている。摺動子２１の他半部の中央部より接触部２３が底面側 に切り起こされ、その遊端部が集電体１４と接触している。その接触部２３の両 側は回転体１９の底面と対接され、そこに形成された小孔２４に回転体１９の小 突起２５が挿入され、熱かしめにより摺動子２１が回転体１６に取付けられる。A slider 21 is attached to the bottom surface of the rotating body 16. The slider is formed by pressing one circular spring metal plate, has a semi-circular hole in one half, and the outside of the hole is an arcuate arm. The groove is formed, and the arm is bent so that the central portion of the arcuate arm serves as the contact portion 22 and makes sliding contact with the resistor 13. The contact portion 23 is cut and raised from the center of the other half of the slider 21 toward the bottom surface, and the free end thereof is in contact with the current collector 14. Both sides of the contact portion 23 are in contact with the bottom surface of the rotating body 19, the small protrusions 25 of the rotating body 19 are inserted into the small holes 24 formed therein, and the slider 21 is attached to the rotating body 16 by heat staking. Mounted.

【０００５】 ケース１１の上面に弾性金属製のカバー２６が取付けられ、カバー２６の中央 開口から軸１９が外部へ突出し、カバー２６と回転体１６のリング状段部１８と の間にＯリング２７が介在され、回転体１６のリング状突条１７の底面が受け部 １８に弾性的に抑えられる。ケース１１の底面から抵抗体１３の両端と接続され た端子２８，２９、集電体１４と接続された端子３１が外部へ導出されている。A cover 26 made of an elastic metal is attached to the upper surface of the case 11, a shaft 19 projects outward from a central opening of the cover 26, and an O-ring 27 is provided between the cover 26 and the ring-shaped step portion 18 of the rotating body 16. Is interposed, the bottom surface of the ring-shaped protrusion 17 of the rotating body 16 is elastically suppressed by the receiving portion 18. From the bottom surface of the case 11, terminals 28 and 29 connected to both ends of the resistor 13 and a terminal 31 connected to the current collector 14 are led out to the outside.

【０００６】[0006]

【考案が解決しようとする課題】[Problems to be solved by the device]

摺動子２１の接触部２２は抵抗体１３と弾性的に接触し、接触圧力が接触部２２ にかかっているため、その反力が摺動子２１のかしめ固定部に加わっている。こ の状態で長期間の使用で、または端子２８，２９，３１を半田付けするときに加 えられる熱により、かしめ部分に弛みが生じ、接触部２２の接触圧を低下し、所 要の接触圧が得られなくなり、可変抵抗器としての特性が損なわれることがあっ た。 Since the contact portion 22 of the slider 21 elastically contacts the resistor 13 and the contact pressure is applied to the contact portion 22, the reaction force is applied to the caulking fixing portion of the slider 21. In this state, when used for a long period of time or due to heat applied when soldering the terminals 28, 29 and 31, the caulked portion is loosened, the contact pressure of the contact portion 22 is reduced, and the required contact is made. The pressure could not be obtained, and the characteristics of the variable resistor could be impaired.

【０００７】[0007]

【課題を解決するための手段】[Means for Solving the Problems]

この考案によれば、摺動子の抵抗体との接触部と反対の端部が、回転軸心から 離れる方向に一体に延長され、その延長部が回転体と受け部とにより挟まれてい る。 According to this invention, the end of the slider opposite to the contact portion with the resistor is integrally extended in the direction away from the rotation axis, and the extended portion is sandwiched between the rotor and the receiving portion. ..

【０００８】[0008]

【実施例】【Example】

図１Ａにこの考案の実施例を、図１Ｂにその要部をそれぞれ示し、図２および 図３と対応する部分に同一符号を付けてある。この考案においては、摺動子２１ の抵抗体１３との接触部２２と反対の端部が軸心から遠ざかる方向に延長され、 延長部３３とされ、延長部３３は回転体１６と受け部１５とに挟まれ、延長部３ ３は受け部１５に回転体１６で弾性的に抑えられる。このため実施例では、リン グ状突条１７に切欠き３４が形成され、切欠き３４による延長部３３が嵌合され る。この場合、突条１７の高さと摺動子２１の板厚とはほゞ等しくされる。 FIG. 1A shows an embodiment of the present invention, and FIG. 1B shows the essential parts thereof, and the portions corresponding to those of FIGS. 2 and 3 are designated by the same reference numerals. In this invention, the end of the slider 21 opposite to the contact portion 22 with the resistor 13 is extended in the direction away from the axis to form an extension 33, which is the rotating body 16 and the receiving portion 15. The extension portion 33 is elastically suppressed by the rotating body 16 in the receiving portion 15 by being sandwiched between. Therefore, in the embodiment, the notch 34 is formed in the ring-shaped protrusion 17, and the extension portion 33 formed by the notch 34 is fitted. In this case, the height of the protrusion 17 and the plate thickness of the slider 21 are made substantially equal.

【０００９】 このように構成されているから、摺動子２１の小突起２５による熱かしめに弛 みが生じた状態になって、接触部２２の抵抗体１３に対する接触圧に対する反力 により、摺動子２１の延長部３３側が回転体１６の底面から浮き上がろうとして も、回転体１６により延長部３３が受け部１５に抑えられているから、延長部３ ３が浮き上がることがなく、接触部２２は所要の圧力で抵抗体１３に接し、安定 に動作する。With this configuration, the small protrusion 25 of the slider 21 causes a slack in the heat caulking, and the reaction force of the contact portion 22 against the contact pressure of the resistor 13 causes the sliding. Even if the extension portion 33 side of the pendulum 21 tries to float from the bottom surface of the rotating body 16, the extension portion 33 is held by the receiving portion 15 by the rotating body 16, so that the extension portion 33 does not float up and contact is made. The portion 22 contacts the resistor 13 with a required pressure and operates stably.

【００１０】 なお、延長部３３は受け部１５上に沿って更に延長され、リング状に構成され てもよい。この場合は突条１７がなくなる。The extension portion 33 may be further extended along the receiving portion 15 to have a ring shape. In this case, the ridge 17 is eliminated.

【００１１】[0011]

【考案の効果】[Effect of the device]

以上述べたように、この考案によれば摺動子２１の抵抗体との接触部２２と反 対の端部が延長されて、その延長部３３が回転体１６と受け部１５とで挟まれて いるため、摺動子２１のかしめに弛みが生じても、接触部２２の抵抗体１３への 接触圧は変動することなく、一定に保持され、安定に動作する。 As described above, according to the present invention, the contact portion 22 of the slider 21 with the resistor is opposed to the end portion thereof, and the extension portion 33 is sandwiched between the rotating body 16 and the receiving portion 15. Therefore, even if the caulking of the slider 21 is loosened, the contact pressure of the contact portion 22 with respect to the resistor 13 does not fluctuate and is kept constant and operates stably.

【図面の簡単な説明】[Brief description of drawings]

【図１】Ａはこの考案の実施例を示す断面図、Ｂはその
回転体１６および摺動子２１を示す斜視図である。FIG. 1 is a sectional view showing an embodiment of the present invention, and B is a perspective view showing a rotor 16 and a slider 21 thereof.

【図２】Ａは従来の可変抵抗器を示す断面図、Ｂはその
外観斜視図である。2A is a sectional view showing a conventional variable resistor, and FIG. 2B is an external perspective view thereof.

【図３】図２の従来の可変抵抗器の分解斜視図。FIG. 3 is an exploded perspective view of the conventional variable resistor of FIG.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】 ケースの内周壁に形成された受け部に、
回転体の底面周縁部が対接されて、回転体が回転自在に
ケース内に収容され、 上記回転体の底面に取付けられた摺動子の一端部が、上
記ケースの内底面に設けられた抵抗体と摺動接触し、そ
の摺動子の他端部が上記回転体の底面に対接され、 上記回転体が上記受け部に弾性的に抑えられている可変
抵抗器において、 上記摺動子の上記抵抗体との接触部と反対の端部が上記
回転体の回転軸心から離れる方向に一体に延長され、 その延長部が上記回転体と上記受け部とにより挟まれて
いることを特徴とする可変抵抗器。1. A receiving portion formed on an inner peripheral wall of the case,
The rotating body is rotatably accommodated in the case by contacting the peripheral portion of the bottom surface of the rotating body, and one end of the slider attached to the bottom surface of the rotating body is provided on the inner bottom surface of the case. A variable resistor that is in sliding contact with a resistor, the other end of the slider is in contact with the bottom surface of the rotating body, and the rotating body is elastically restrained by the receiving portion. The end portion of the child opposite to the contact portion with the resistor is integrally extended in the direction away from the rotation axis of the rotating body, and the extended portion is sandwiched between the rotating body and the receiving portion. Characteristic variable resistor.