Lens device
AssigneeFuji Photo Optical Co., Ltd.
InventorRyuta Sasaki
Life of this patent
Estimating the term…
Abstract
The lens device is capable of preventing a guide member from being disengaged from a guide groove with a simple construction, in which a projecting thread portion is formed on a sidewall of the guide groove for guiding a lens barrel in a straight motion and a recessed thread portion to be engaged with the projecting thread portion is formed on a sidewall of the guide member that is guided by the guide groove. A straight guide groove along the optical axis is formed on an inner peripheral surface of a first lens barrel, and a straight guide projection that is guided by the straight guide groove is formed on a second lens barrel. On a sidewall of the straight guide groove, a projecting thread portion is formed and on a sidewall of the straight guide projection, a recessed thread portion to be engaged with the projecting thread portion is formed.
Claims23
A lens device, comprising:
- a lens holding member that holds a lens, a guide groove parallel to an optical axis being formed on a peripheral surface of the lens holding member;
- and
- a guide member engaged with the guide groove of the lens holding member, the guide member movably guiding the lens holding member along the optical axis,
- wherein a projecting thread portion is formed on a sidewall of the guide groove along the direction of the optical axis, and a recessed thread portion to be engaged with the projecting thread portion of the guide groove is formed on the guide member.
A lens device, comprising:
- a lens holding member that holds a lens, a guide groove parallel to an optical axis being formed on a peripheral surface of the lens holding member;
- and
- a guide member engaged with the guide groove of the lens holding member, the guide member movably guiding the lens holding member along the optical axis,
- wherein a recessed thread portion is formed on a sidewall of the guide groove along the direction of the optical axis, and a projecting thread portion to be engaged with the recessed thread portion of the guide groove is formed on the guide member.
A method to form a lens device, comprising:
- forming a lens holding member including a guide groove parallel to an optical axis on a peripheral surface of the lens holding member, wherein the guide groove includes one of a projecting thread portion and a recessed thread portion in a side wall of the guide groove;
- and
- forming a guide member including a thread portion parallel to the optical axis on a sidewall of the guide member, wherein the thread portion of the guide member engages the one of the projecting thread portion and the recessed thread portion in the side wall of the guide groove.
Dependencies are inferred from the claim text.