JPS62170514U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a fine movement device according to an embodiment of the present invention, and FIG. 2 is a partially enlarged exploded perspective view thereof. 1: Survey instrument body frame, 2: Rotating axis, 3: Fixed ring,
3a: Arm of fixed ring 3, 9: Fixed shaft, 10: Fixed knob, 11: Fine movement knob, 14: Guide cylinder shaft, 15
: Fine movement screw tube, 16: Coarse movement screw, 17: Fine movement screw, 18: Lever, 20: Lever pressure contact member, 21: Pin, 22: Stopper.

Claims (1)

[Scope of utility model registration request] In a fine movement device that slightly rotates the rotating shaft by pressing an arm extending from a fixed ring into which the rotating shaft of a surveying instrument is loosely inserted, a fine movement screw cylinder screwed onto the main body of the surveying instrument is used. , a fine adjustment knob coaxially screwed into the fine adjustment threaded tube, engages with the fine adjustment screw tube by rotation in one direction, and thereafter, when rotating in the same direction, the fine adjustment of the fine adjustment knob is performed. A first stopper means for rotating the screw barrel together with the fine adjustment knob is engaged with the fine adjustment screw tube by rotation in the other direction, and is engaged with the fine adjustment knob by subsequent rotation in the same direction. a second stopper means for integrally rotating the fine adjustment screw tube; and a second stopper means for reducing the screwing movement of the fine adjustment knob relative to the fine adjustment screw tube and converting it into an axial forward and backward movement of the fixed shaft; The first stopper means is a ring-shaped stopper means fixed in the fine adjustment knob. The second stopper means is constituted by a pin implanted in the lever pressure contact member and a stopper protruding from the rear end of the fine movement threaded cylinder, and the second stopper means is configured such that the pin and the stopper are engaged in the other direction. The conversion transmission means is loosely inserted into the fine movement screw cylinder, and the fixed shaft is loosely inserted therein, so that only movement in the axial direction is transmitted to the fixed shaft. and a guide cylinder shaft configured to be provided at the rear end of the fine adjustment threaded cylinder, the rear surface of the lever contacting member being in contact with the inner inclined surface, and the front surface of the guide cylinder shaft being in contact with the rear end of the guide cylinder shaft. A fine movement fixing device for a rotating shaft of a surveying instrument capable of coarse and fine movements, characterized in that it is comprised of a lever.