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US 5,349,323 AGranted
Seesaw manipulation-type variable resistor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHideki Shigemoto, Hiroshi Matsui
Life of this patent
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Abstract
A seesaw manipulation-type variable resistor is provided which has a linear sliding-type variable resistor unit. A U-shaped groove in a below-extended arm of a manipulation key smoothly interlink with a coupling member of a linear sliding-type variable resistor. A position restoring leaf spring is provided touching protrusions under both ends of the manipulation key, to give the manipulation key a force for restoration to its neutral position.
Claims6
A seesaw manipulation-type variable resistor comprising:
- a base frame;
- a manipulation key pivotally supported, at a midpoint, on said base frame and has an integrally-formed arm below said midpoint;
- a linear sliding-type variable resistor unit provided under said base frame and having a coupling member which engages with said arm;
- a leaf spring accommodated in a space formed between said base frame and said manipulation key, said leaf spring having two lengthwise ends resiliently fitting in confronting rectangular recesses provided in each of two lateral ends of said base frame;
- said leaf spring touching under surfaces of said two lateral ends of said manipulation key for urging said manipulation key to return to a neutral position;
- and
- at least one anti-vibration piece provided on at least one of said touching parts of said leaf spring between the leaf spring and the manipulation key.
4 more elements
A seesaw manipulation-type variable resistor comprising:
- a base frame;
- a manipulation key pivotally supported at a midpoint on said base frame, said manipulation key having an integrally-formed arm below said midpoint;
- a linear sliding-type variable resistor unit provided under said base frame, said linear sliding variable resistor having a coupling member which engages with said arm;
- a leaf spring accommodated in a space formed between said base frame and said manipulation key, said leaf spring having two lengthwise ends resiliently fitting in two confronting rectangular recesses provided in each of two lateral ends of said base frame, said leaf spring touching under surfaces of said two lateral ends of said manipulation key for urging said manipulation key to return to a neutral position;
- and
- an anti-vibration piece provided between the leaf spring and the manipulation key.
3 more elements
Dependencies are inferred from the claim text.