JPH0352708U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing the main parts of one embodiment of a lens barrel for a CCTV camera according to the present invention, FIG. 2 is a side sectional view showing the main parts of another embodiment, and FIG. 2 is a schematic front view of the main parts of FIG. 2, FIG. 4 is a side sectional view showing the main parts of another embodiment of the CCTV camera lens barrel according to the present invention, and FIG. FIG. 6 is a side sectional view showing the main part, and FIG. 6 is a schematic front view of the main part in FIG. 5. 1...Fixed lens barrel, 1a...Mount screw, 1b
...Guide hole, 1c...Guide hole, 1m...Attaching surface,
1u...Abutting surface, 1D...Pilot diameter, 2...Operation shaft, 2m...End face, 3...Operation member, 3u...
End face, 4... Lens barrel, 4D... Pilot diameter, 5...
Leaf spring, 6... Straight guide key, 7... Focus adjustment screw, 7m... End face, 8... Decorative frame, 9... External switching member, 10... Lens group, 11... Spring washer.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a lens barrel for optical equipment in which a focusing operation is performed by rotating an operating member for focusing operation that protrudes partially from an exterior member of the lens barrel. , the operating member 3 is rotatably screwed onto the operating shaft 2 fixed to the lens barrel 4 of the optical system holding member, and a focus adjustment screw 7 is also provided, so that the fixed lens barrel 1 attached to the optical equipment main body can be moved in a straight line. The lens barrel 4 is connected through a feeding mechanism, and at the same time, a leaf spring 5 is held between the lens barrel 4 and the fixed lens barrel 1, and the repulsive force of the leaf spring 5 always keeps the lens barrel 4 and the fixed lens barrel 1 The spring pressure is applied in the direction of narrowing the distance between the two, and the spring pressure is received by the end face of the focus adjusting screw 7 at the infinite position of the optical system, and the operating member 3 is applied at the other than the infinite position. A focusing device for a lens barrel for an optical instrument, characterized in that the lens barrel is received by an end face of the operating member 3 and extended from an infinity position to a close-range photographing position by the rotational movement of an operating member 3. (2) A focusing device for a lens barrel for an optical instrument, in which the tip of the focusing screw 7 has an additional role of a linear guide key in the device described in claim (1) of the utility model registration claim. . (3) In the device described in claim (1) or (2) of the utility model registration, an external switching member 9 is attached to the focus adjustment screw 7 so that the rotation operation within a specified range can be manually performed from the outside. A focusing device for a lens barrel for an optical instrument, characterized in that the amount of correction is made to correct the amount of movement of the imaging point at the infinite position due to the difference in the imaging wavelength by the rotation operation within the prescribed range. (4) In the lens barrel where the focusing operation is performed by rotating the operating member that protrudes partially from the exterior member of the lens barrel, the operating member is screwed into the lens barrel 4 of the optical system holding member. The operating member 3 is screwed onto the implanted operating shaft 2, and the lens barrel 4 is coupled to the fixed lens barrel 1, which is a mounting member to the optical equipment main body, via a straight-advance mechanism for straight-advancing movement. At the same time, a leaf spring 5 is held between the lens barrel 4 and the fixed lens barrel 1, and the repulsive force of the leaf spring 5 always creates spring pressure in the direction of narrowing the distance between the lens barrel 4 and the fixed lens barrel 1. When the optical system is at the infinite position, the spring pressure is received by the end face of the operating shaft 2, and at other positions than the infinite position, the spring pressure is received by the end face of the operating member 3, thereby preventing the rotation of the operating member 3. A focusing device for a lens barrel for an optical instrument, characterized in that the lens barrel is extended from an infinity position to a short-distance photographing position by movement. (5) A focusing device for a lens barrel for an optical instrument, characterized in that the tip of the operating shaft 2 serves as a linear guide key in the device described in claim (4) of the utility model registration claim. . (6) In the device described in claim (4) or (5) of the utility model registration, an external switching member 9 is attached to the operating shaft 2 so that rotation operation within a specified range can be manually performed from the outside. A focusing device for a lens barrel for an optical device, characterized in that the rotational operation within the prescribed range provides a correction amount that corrects the amount of movement of the imaging point at the infinite position due to the difference in imaging wavelength. .