Importance

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Abstract

A rotary oil damper includes a housing incorporating therein a storing chamber open on one side, a cap having a hole and for shutting the opening in the storing chamber of the housing, a rotor including a base part and a shaft part and disposed rotatably inside the storing chamber of the housing, a toothed wheel fixed to the shaft part of the rotor, viscous oil filling said storing chamber of the housing, and a ring-shaped leaf spring member having opposite terminal parts separated from each other and contained in conjunction with the rotor inside the storing chamber. The shaft part of the rotor protrudes outwardly through the hole of the cap. With one of the opposite terminal parts of the spring member fixed to the base part of the rotor, the spring member moves along the inner wall surface of the storing chamber through a membranous layer of the viscous oil formed between the inner wall surface of the storing chamber and the peripheral surface of the spring member synchronously with the normal or reverse rotation of the rotor within the storing chamber.

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First Claim