Lens moving device
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorKazuhiro Ichinokawa
Life of this patent
Estimating the term…
Abstract
A lens moving device comprises a cam follower which is provided to a lens holding frame supporting a lens, and a cam gear with which the cam follower is engaged. The cam gear is rotated by a stepping motor, so that the lens holding frame and the lens move along the optical axis thereof. The cam gear is molded from synthetic resin and is provided with a stopper at the both ends of a non-operative area, in which the cam follower does not come in contact during a normal operation. The non-operative area has a gate mark, which is formed during the resin molding process. The stopper prevents the cam follower from interfering with the gate mark.
Claims6
A lens moving device comprising:
- a lens support mechanism that supports a lens in such a manner that said lens moves along the optical axis thereof;
- a drive source that moves said lens along the optical axis;
- a cam member that is rotated by said drive source, said cam member being molded from synthetic resin and being provided with a stopper;
- and
- a cam follower that comes in contact with said cam member to transmit the rotational movement of said cam member to said lens support mechanism as a linear movement of said lens along the optical axis;
- said cam member being provided with a non-operative area with which said cam follower does not come in contact during a normal operation, said non-operative area having a gate mark formed during the resin molding process, said stopper preventing said cam follower from interfering with said gate mark.
A lens moving device comprising:
- means for supporting a lens in such a manner that said lens moves along the optical axis thereof;
- a cam member that has an operative area and a non-operative area, said cam member being molded from synthetic resin, said non-operative area having a gate mark formed during the resin molding process;
- means for moving said cam member;
- a cam follower that comes in contact with said operative area to transmit the movement of said cam member to said supporting means to move said lens in a normal operation, and does not come in contact with said non-operative area during said normal operation;
- and
- means for preventing said cam follower from interfering with said gate mark.
Dependencies are inferred from the claim text.