PURPOSE: To enable realization of a small-sized and inexpensive video camera with simple constitution by constituting with the 1st and 2nd lens holding frames movable toward the optical axis are moved toward the optical axis by the two cam grooves of a flat plate cam.
CONSTITUTION: When a zoom motor 29 runs, a driving wheel is rotated counterclockwise by a gear 31 fixed to a motor shaft and an idler gear 32. A cam plate 23 is turned in the direction intersecting orthogonally with the optical axis by the pin of the driving wheel engaged with the perforation of a cam plate 23 and the 1st and 2nd lens holding frames 28 embedded with cam followers 41, 42 engaging with cam grooves 25, 26 are moved toward the optical axis while regulated by the grooves 25, 26, by which the zooming operation is accomplished.
| JPS6141229 | [Title of the device] An iris diaphragm value amendment device of the lens for cameras |
| JPH09203850 | ZOOM LENS BARREL |
| JPH04271332 | LENS BARREL |
TOKUNAGA TOMOKAZU
ISAKI MASATAKA
| JP49095949B | ||||
| JPS4950923A | 1974-05-17 | |||
| JPS5344021A | 1978-04-20 | |||
| JPS5332726A | 1978-03-28 |
Next Patent: LENS BARREL FOR VIDEO CAMERA