The present invention provides a damper capable of preventing reduction in torque during operation of the damper. The damper includes: a housing that includes an outer cylinder portion, an inner cylinder portion provided inwardly of the outer cylinder portion, a bottom portion arranged to connect the outer cylinder portion and the inner cylinder portion, and a filling space portion defined between the outer cylinder portion and the inner cylinder portion, a viscose fluid being filled in the filling space portion; a rotor that includes a head portion and a rotor cylinder portion extended downwardly from the head portion and disposed in the filling space portion; and an O-shaped sealing ring arranged to seal the filling space portion. The rotor includes first groove portions provided on an outer peripheral surface of the rotor cylinder portion near the bottom portion apart from the O-shaped sealing ring so as to extend in an axial direction, and a second groove portion provided on an inner peripheral surface of the rotor cylinder portion near the bottom portion apart from the O-shaped sealing ring so as to extend in the axial direction. At least one of the first groove portions includes a communicating portion which communicates the inside and the outside of the rotor, and the second groove portion is apart from the communicating portion in a circumferential direction.
Damper and handle device having the same
2015-04-29
Patent
Electronic Resource
English
HANDLE FOR HANDLE-EQUIPPED SNOWBOARD AND HANDLE-EQUIPPED SNOWBOARD HAVING SAME
European Patent Office | 2020
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