Murata Manufacturing Co., Ltd.

Takeshi Doi

Yukinori Ueda

Motohiro Kinoshita

A thin-thickness variable resistor is provided, which is capable of stabilizing electrical connection between metallic terminals and a resistor by increasing the holding strength for a second terminal by a substrate while preventing the bending strain during the bending work from spreading to a conductive portion conductive to the resistor. A variable resistor comprises a substrate, metallic terminals formed in the substrate by insert-molding, and a slider sliding on a resistor formed on the substrate, wherein the slider is rotatably attached by crimping an eyelet formed in a first metallic terminal. External-connecting portions of the metallic terminals are extended from the bottom portion of the substrate to be bent upwardly along sides of the substrate. Anchor portions to be embedded into the substrate are unitarily formed in the vicinity of the conductive portions of the second metallic terminals conductive to the resistor and between the conductive portions of the second metallic terminals and the external connection portions thereof.

Variable resistor

A variable capacitor includes a driver member including one metal sheet, a head having a driver groove provided therein, engagement portions engaged with a rotor, and a spring function portion in pressure-contact with the rotor are integral with each other. The spring function portion includes a first plate portion extending from one end of the head, which is bent in the first bending portion, and elongated, passing a center shaft, and a second plate portion extending from the end of the first plate portion, which is bent in the second bending portion, and elongated, passing the center shaft. The second plate portion functions as a pressure-contact portion for the rotor.

Variable capacitor

A variable resistor is constructed to prevent bending strain from spreading to the conductive portions to a resistor when bending is executed with respect to the external connection portions of metallic terminals. The variable resistor provides a low-profile variable resistor capable of stabilizing the electrical connection between the metallic terminals and the resistor. This variable resistor includes metallic terminals insert-molded in a board, and a slider sliding on the resistor disposed on the board. The slider is rotatably installed on the board by caulking the grommet disposed on a first metallic terminal,and the conductive portions of second metallic terminals are conductive to the resistor. Each of the external connection portions is extended out of the bottom of the board, and is folded upwardly at the position of the corresponding notch. Thereby, bending stress is minimized, the looseness of the metallic terminals with respect to the board is prevented, and the reliability of the connection between the resistor and the conducting portions is increased.

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Fukui-ken, Japan

Takeshi Doi