Mitsubishi Denki Kabushiki Kaisha

Kazuo Chimura

Hiroshi Matsuoka

Toshihiro Oishi

Shigeki Kariya

A projector has a first casing A (including a first part and a second part ) and a second casing B (including a third part ). The second casing B is moved between an enlarging position where the second casing B is protruded from the first casing A and a reducing position where the second casing B is retracted into the first casing A. As the second casing B moves to the enlarging position, the distance between the exhaust ports and the exhaust fan increases, so that the wind noise is restricted. As the second casing B moves to the reducing position, the exhaust ports are concealed in the first casing A, so that the entry of the dust or the like into the projector is prevented.

Projector

A rotating apparatus for rotating an object utilizes a worm gear in which worm wheel torque supplied from a rotation table can be transferred to a worm gear. In this way the invention avoids a conventional disengaging mechanism that disengages the rotating apparatus when torque is supplied from the rotation table. Further, spring members and stoppers physically define a first and second rotation ranges and a split cam shuts off a drive motor within the first rotation range. Still further, an anti-backlash member is provided on the worm gearing. To prevent pinched fingers and dust accumulation, a skirt is preferably provided on the bottom, front edge of the object being rotated which closes a gap between the object and a support surface when the object is placed on the rotating apparatus.

Growing community of inventors

Tokyo, Japan

Kazuo Chimura