Lens barrel for holding lens
A lens barrel for holding a lens includes a barrel body for containing the lens. A ring shaped receiving wall is formed on the barrel body, for receiving a rear face of a peripheral portion of the lens, to position the lens in an optical axis direction. Three retaining claw portions are disposed to project from the barrel body, for retaining the lens on the ring shaped receiving wall by engagement with the peripheral portion thereof. Three first through holes are formed in the barrel body, and adapted to insertion and pressure of an external adjusting rod for positioning adjustment of the lens. Second through holes are formed in the barrel body, and adapted to introduction of adhesive agent for attaching the lens on the barrel body. The retaining claw portions and the first through holes are arranged at a regular pitch on a circumference of the barrel body.
1. A lens barrel for holding a lens, comprising:
a barrel body for containing said lens;
a ring shaped receiving wall, formed on said barrel body internally, for receiving a rear face of a peripheral portion of said lens, to position said lens in an optical axis direction;
plural retaining claws, disposed on said barrel body, for retaining said lens on said ring shaped receiving wall by engagement with said peripheral portion thereof;
plural first through holes, formed in said barrel body, adapted to insertion and pressure of an external adjusting rod to said peripheral portion in a direction crosswise to said optical axis direction, for positioning adjustment of said lens; and
plural second through holes, also formed in said barrel body, adapted to introduction of adhesive agent for attaching said lens to said barrel body.
2. A lens barrel as defined in claim 1 , wherein said retaining claws and said first through holes are arranged at a regular pitch rotationally on a circumference of said barrel body.
3. A lens barrel as defined in claim 2 , wherein said first through holes are used also by way of said second through holes.
4. A lens barrel as defined in claim 2 , further comprising a connection tubular portion disposed to project from a rear end of said barrel body, and having a smaller diameter than said barrel body.
5. A lens barrel as defined in claim 4 , wherein said second through holes are disposed outside said ring shaped receiving wall and close to said connection tubular portion.
6. A lens barrel as defined in claim 1 , wherein said plural retaining claws are at least three retaining claws, and said plural first through holes are at least three through holes.
7. A lens barrel as defined in claim 6 , further comprising two slits, formed in said barrel body, so positioned that each of said plural retaining claws is located therebetween, for partial separation thereof, and for imparting resiliency thereto.
8. A lens barrel as defined in claim 7 , wherein each of said plural first through holes is located in a position between said slits associated with one of said retaining claws.