Minolta Company, Ltd.

Hiroyuki Ogura

Toyotoshi Kawasaki

Hiroshi Ootsuka

Hideki Nagata

Tetsuya Uno

Takashi Okada

Toshihiro Hamamura

Masaaki Miyano

Taro Shibuya

In a lens barrel of a zoom lens, a luminous flux is divided or its path is switched so that the same luminous flux is directed to both a taking optical system and a finer optical system. Focusing and camera shake compensation are performed before division of the luminous flux or switching of its path so that images observed through a finder are already in focus and compensated for camera shakes. The lens barrel has multiple movable segments to allow the taking optical system and the finder optical system to be moved out simultaneously. To achieve zooming, a holding member for holding both a focusing lens unit and other lens units is moved so that all these lens units are moved simultaneously. Adjustment of the focusing lens unit, necessitated as a result of zooming, is achieved by moving a part of the focusing lens unit within the holding member.

Lens barrel and camera provided with a lens barrel

A skirt located on a worm is inserted in a C-shaped hole of a photo-interrupter blade wheel, and a motor shaft passes thought the center of each of said members. The rotation of the worm is transmitted to photo-interrupter blades with a predescribed angle of play due to the relative dimensions of a notch formed on the skirt and the C-shaped hole.

Rotation device and apparatus equipped with rotation device

A sliding coupling mounted between a pair of separately rotational members, including a pair of coiled springs, which realizes no rotational delay at time of reversing a rotational direction of one of the rotational members. Each coiled spring has a projecting part extending radially outwardly from one end thereof. The pair of coiled springs are fictionally mounted on an outer surface of one of the rotational members with the circular parts and the projecting parts of the coiled springs being overlapped with each other so that the winding directions of the coiled springs are opposite to each other. The other rotational member has an engaging groove with which the projecting parts of the coiled springs are engaged without a space between each projecting part and a surface forming the engaging groove of the rotational member in each rotational direction. When the rotational direction of the one rotational member is reversed, the rotational direction of the other rotational member is also reversed with no rotational delay.

Drive transmission mechanism

Growing community of inventors

Nishinomiya, Japan

Hiroyuki Ogura