Small gear rack focalizer with intubation tube interface

By designing a small gear and rack focusing mechanism with a tube interface, the problem of not being able to add a handwheel in the existing focusing structure of astronomical telescopes was solved, achieving smoother, finer adjustments and higher precision focusing effect.

CN224480605UActive Publication Date: 2026-07-10KUNMING UNITED OPTICS CORP
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Patent Information

Application Number
CN202521485736.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-16
Publication Date
2026-07-10
Estimated Expiration
2035-07-16

AI Technical Summary

Technical Problem

In existing astronomical telescopes, most 1.25-inch focusing mechanisms use a double-helix structure, which makes it impossible to add an additional handwheel for focusing, resulting in inconvenience.

Method used

Design a small gear and rack focusing device with a tube interface, consisting of a base, a focusing seat, and a focusing tube. The gear shaft is perpendicular to the axis of the astronomical telescope. The focusing seat is connected to the base by a rotating bearing. The focusing handwheel is fixed by a set screw. The rack and gear shaft cooperate to realize the forward and backward movement of the focusing tube. The limit screw adjusts the tightness of the tile. The hand screw and PTFE washer prevent the focusing tube from sliding.

Benefits of technology

It enables convenient adjustment of the small telescope via a handwheel. The gear axis of the rack and pinion focusing device is perpendicular to the axis of the astronomical telescope. The addition of a handwheel for focusing in the lateral space makes the adjustment smoother, more precise, and more accurate.

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Abstract

The utility model discloses a small-sized gear rack focalizer with an intubation tube interface. The small-sized gear rack focalizer is composed of a base, a focusing seat and a focusing cylinder, a through hole is formed in the middle of the base, the gear shaft penetrates through the through hole, and focusing hand wheels are arranged at the two ends of the gear shaft. The lower part of the focusing seat is connected with the base, a focusing cylinder is arranged in the focusing seat, two tiles and a polytetrafluoroethylene gasket are arranged on the contact surface of the upper part of the focusing seat and the focusing cylinder, the tiles are adjusted through limiting screws, and the polytetrafluoroethylene gasket is adjusted through a hand screw; the rear end of the focusing cylinder is provided with connecting threads and a C-shaped ring, the C-shaped ring abuts against a knurled small-head screw, the lower portion of the focusing cylinder is provided with a rack, and the rack is matched with the gear shaft. The rear end of the focalizer can be connected through screw-thread fit or direct insertion of an insertion tube, so that a user can conveniently adjust a small telescope with a hand wheel, and the experience is optimized.
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