JPH02867U - - Google Patents

Description

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIGS. 1A and 1B are partially cutaway perspective views showing the main parts, FIG. 2 is an exploded perspective view of the entire viewfinder device, and FIG. The figure is a central vertical cross-sectional view showing the main parts, Figure 4 is a cross-sectional view taken in the - arrow direction of Figure 3, and Figure 5
The figure is a perspective view of the entire video camera. In addition, in the symbols used in the drawings, 1
...video camera, 4...viewfinder device, 7
...Eyepiece, 11...Lens, 12...Retaining ring, 1
3... Guide pin, 16... Guide tube, 16a... One end of guide tube, 17... Spiral groove, 17a... Open end of helical groove, 35... Outer casing, 40... Straight groove, 40a...
This is the open end of a straight groove.

Claims (1)

[Claims for Utility Model Registration] 1. A system comprising a lens for magnifying an image captured by a video camera, a retaining ring holding the lens disposed within a rotatable guide cylinder, and provided on the outer periphery of the retaining ring. A plurality of guide pins pass through a plurality of helical grooves provided in the guide tube and are fitted into a plurality of linear grooves fixedly provided outside the guide tube, so that the plurality of guide pins pass through a plurality of helical grooves provided in the guide tube and are fitted into a plurality of linear grooves fixedly provided outside the guide tube, so that the In a viewfinder device for a video camera configured to move and adjust the lens in the optical axis direction by the feeding action of the plurality of guide pins using a helical groove and a straight groove, the plurality of helical A video camera characterized in that one end of the groove and the linear groove is formed as an open end, and the plurality of guide pins can be extracted outward from the open end of the plurality of helical grooves and the linear groove. viewfinder device. 2. A retaining ring holding the lens is disposed in a rotatable guide cylinder, and a plurality of guide pins provided on the outer periphery of the retaining ring are attached to the guide cylinder. A plurality of helical grooves provided in the tube are passed through and the guide tube is fitted into a plurality of straight grooves provided in a fixed state outside the guide tube, and as the guide tube rotates, the plurality of helical grooves and straight grooves are inserted into the guide tube. In a viewfinder device for a video camera configured to move and adjust the lens in the optical axis direction by the feeding action of a plurality of guide pins, the guide tube is directly rotatably supported within the outer casing, and the plurality of guide pins are rotatably supported. 1. A viewfinder device for a video camera, characterized in that a straight groove is provided on the inner periphery of the outer casing.