Oiles Corporation

Victor Company of Japan, Limited

Hiroshi Watanabe

Ryohei Kaneko

Wataru Nishioka

Tetsuji Suzuki

Takatsugu Aizaki

Naohiro Horita

Noboru Fujino

Yu Yoshikawa

Syunsaku Satoh

Kenichi Okumura

The present invention enables a simple structure to provide an easy adjustment of damping torque to be caused by applied rotation. The rotary damper () is intend to limit movement of viscous fluid filled in a circular cylindrical chamber (), thereby generating a damping torque in response to an applied rotational force. The lid () is the screw-on type capable of being screwed into the casing (), and thus adjusting a clearance gap G1 between the lid () and each partition () by way of changing the screwing amount of the lid () into the casing () allows amount of viscous fluid moving through the clearance gap G1 to be adjusted, thereby resulting in adjustment of a damping torque to be caused by rotation. In addition, each axial force generation member () includes a plastically or elastically deformable element and is located between the lid () and the corresponding partition () to apply a reaction force to the lid (). This causes screwing the lid () into the casing () to generate an axial force, thereby preventing external-leakage of the viscous fluid via a threaded interface between the lid () and the casing (), and allows the leeway for the adjustment of the clearance gap G1 to increase.

Rotary damper

A rotary damper () has a first sealing ring () and a first bushing () which are located between a through-hole () of a circular cylindrical chamber () inside a case () and a lower end part () of a rotor body () of a rotor (), and a second sealing ring () and a second bushing () which are located between a through-hole () in a lid () and an upper end part () of the rotor body (). The first sealing ring () has an outer peripheral surface () having a width in a direction of a center axis of the circular cylindrical chamber () and being pressed against an inner peripheral surface () of the through-hole (), and an inner peripheral surface () having a width in the direction of the center axis of the circular cylindrical chamber () and being pressed against an outer peripheral surface () of the lower end part (), and the second sealing ring () has an outer peripheral surface () having a width in the direction of the center axis of the circular cylindrical chamber () and being pressed against an inner peripheral surface () of the through-hole(), and an inner peripheral surface () having a width in the direction of the center axis of the circular cylindrical chamber () and being pressed against the outer peripheral surface () of the upper end part ().

Damper

Provided is a damper wherein viscous fluid which fills a circular cylinder chamber is more reliably prevented from leaking. A rotary damper () includes: a first seal ring () of an elastic body, arranged between a through-hole () of a circular cylinder chamber () in a case () and a lower end of a rotor body of a rotor (); and a second seal ring () of an elastic body, arranged between a through-hole () in a lid () and an upper end of the rotor body. The first seal ring () has: an outer peripheral surface with a width in a direction of a center axis of the circular cylinder chamber (), which is pressed against an inner peripheral surface of the through-hole (); and an inner peripheral surface with a width in the direction of the center axis of the circular cylinder chamber (), which is pressed against an outer peripheral surface of the lower end of the rotor body, and also a second seal ring () has: an outer peripheral surface with a width in the direction of the center axis of the circular cylinder chamber (), which is pressed against an inner peripheral surface of the through-hole (); and an inner peripheral surface with a width in the direction of the center axis of the circular cylinder chamber (), which pressed against an outer peripheral surface of the upper end of the rotor body.

[Problem] To provide a rotary damper wherein damping torque generated by rotation can be easily adjusted using a simple configuration. [Solution] A rotary damperlimits the movement of viscous fluid contained in a circular cylinder chamber, thereby generating damping torque against applied rotational force. This rotary damperis configured such that: a lidis screwed into a case; and the gap gbetween the lower surfaceof the lidand the upper surfaceof a partition sectionand the gap gbetween the lower surfaceof the lidand the upper surfaceof a vanecan be adjusted by adjusting the amount of screwing of the lidinto the case. This means that adjusting the amount of movement of viscous fluid through the gaps g, gcan adjust damping torque generated by rotation.

The present invention includes a reflection portion which light-modulates three primary color lights by three rectangular reflective liquid crystal light modulators, then color-combine the light-modulated lights and reflects the resultant light; and a projection lens which projects the reflected color-combined light onto a plane mirror. The three reflective light modulators are arranged in such a manner that their long side directions coincide with a perpendicular direction, and two of the three reflective light modulators are arranged in such a manner that their short side directions become parallel with a projecting direction of image light from a color separation/combination optical system.

Image display apparatus

A light source device equipped with a concave reflector having an open front end section. Installed in the light source device is a light source having a light emitting unit. The unit is positioned on a focal point of the reflector. A cover is attached to the open front end section of the reflector to cover the open front end section. The cover has an air inflow opening provided at a side section thereof in relation to the open front end section. At least a part of the cover is made of a transparent material. The part is a light passage through which light emitted by the light source and reflected by the reflector passes. The light source device is further equipped with a fan having an air outflow opening. The fan is provided so that airflow created by the fan and blown through the air outflow opening is directed to the air inflow opening of the cover, without obstructing the light passing through the light passage. An air control unit is provided between the air outflow opening of the fan and the air outflow opening of the cover. The air control unit controls the airflow blown through the air outflow opening of the fan so that it is flown into the reflector through the air inflow opening of the cover and directed at least to one specific section of the light source, thus cooling the specific section.

Growing community of inventors

Fujisawa, Japan

Hiroshi Watanabe