JPH0418814U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a main part of an embodiment of a CCTV camera lens barrel to which the present invention is applied, and FIG. 2 is a front view of the main part. 1... fixed lens barrel, 1f... convex portion, 2... joint ring,
2f... recess, 2e... rotating stopper, 3...
Lens barrel, 4... Operating ring, 5... Decorative frame, 6... Front group lens frame, 7... Rear group lens frame, 8... Holding ring, 9
...Elastic member, 10... Straight guide screw, 11...
Front lens group, 12... Rear lens group, 13...
Operation surface (slanted surface or cam surface), 14... contact portion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A movable body comprising a fixed lens barrel fixed to an optical device body by a mount screw, and an optical system provided movably in the optical axis direction with respect to the fixed lens barrel, A joint ring that is freely rotatable and movable in the optical axis direction with respect to the fixed lens barrel and movable along the optical axis without rotating with respect to the movable body, and between the joint ring and the movable body. An operation ring is provided between the fixed lens barrel and the movable body to move the movable body in the optical axis direction and perform focusing operations, and an operation ring is located between the fixed lens barrel and the movable body and moves the movable body relative to the fixed lens barrel. and an elastic member elastically elastically brought into close contact with each other in the optical axis direction via a joint ring. A contact surface that comes into close contact with each other due to the elastic force of the member is provided between the fixed lens barrel and the joint ring, and a plurality of concave portions and convex portions that simultaneously engage with each other and restrict rotation are provided on the contact surface, Disengagement is provided between the movable body and the connecting ring by moving the connecting ring forward along the optical axis direction against the elastic force of the elastic member to release the engagement between the concave portion and the convex portion. A mount position changing mechanism for a lens barrel for an optical device, characterized in that a means is provided. (2) In the mount position changing mechanism according to claim (1), the disengagement means between the concave portion and the convex portion moves the connecting ring toward the optical axis without rotating with respect to the movable body. 1. A mount position changing mechanism for a lens barrel for an optical device, comprising a linear guide mechanism provided so as to be movable along the mount. (3) In the mount position conversion mechanism according to utility model registration claim (1) or (2), the concave portion and the convex portion are rotatably fitted to each other, and the convex portion engages rotation stoppers on both sides thereof. A mount position converting mechanism for a lens barrel for an optical device, characterized in that the mount position changing mechanism is configured so that they abut at the same time. (4) In the mount position conversion mechanism according to utility model registration claim (1) or (2), the concave portion and the convex portion do not rotate relative to each other and are fitted in a state in which they are in close contact with rotation stoppers on both sides thereof. A mount position conversion mechanism for a lens barrel for an optical device, characterized in that it is configured to