Motor driven shutter for camera

Claim 1

A motor driven shutter for a camera provided with a drive member moving in a lens operating area and an exposure operating area that are parted in one and the other, only one motor capable of reciprocal operation for operating said drive member, a range member for setting a lens position by interlocking with said drive member in said lens operating area, an urging member for urging said range member in a direction toward an initial position, an opening and closing member which has a sector open and close by interlocking with said drive member on said exposure operating area, locking means which locks said range member at a position corresponding to a focusing detection signal, and releasing means for releasing the locking of said range member by moving said drive member to the lens operating area again after exposure operation is completed, characterized in that: said releasing means consist of a first releasing portion which operates in the neighborhood of the maximum movement of said range member and releases the locking of said locking means; a maintaining portion which maintains the releasement released by said first releasing portion; and a second releasing portion which gets in touch with said drive member in the vicinity of the initial position of said range member and releases the maintaining function of said maintaining portion and said range member is reset so as to follow said drive member.