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Focusing mechanism of a monitoring lens

A lens and support base technology, which is applied to cameras, focusing devices, installations, etc., can solve the problems of unsuitable monitoring lens automatic focusing, high manufacturing cost, complex structure, etc., and achieves convenient focusing, high focusing accuracy, and overall simple structure

Active Publication Date: 2016-07-06
XIAMEN LEADING OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this mechanism can realize the automatic focusing of the camera lens, the structure is relatively complicated, the manufacturing cost is high, and it is not suitable for the automatic focusing of the monitoring lens.

Method used

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  • Focusing mechanism of a monitoring lens
  • Focusing mechanism of a monitoring lens
  • Focusing mechanism of a monitoring lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment one, Figure 1 to Figure 8 As shown, a focusing mechanism for a monitoring lens includes a support base 1, a circular through hole 11 is provided in the middle of the support base 1, a rotating sleeve 2 is set in the circular through hole 11, and the middle of the rotating sleeve 2 There is a lens connecting sleeve 3 for assembling the lens 100, and the rotating sleeve 2 has three spiral guide holes 21 uniformly distributed along the outer peripheral surface, and the inner wall of the circular through hole 11 is uniformly distributed with three axially elongated guide grooves 111, The outside of the support base 1 is equipped with a driving gear 4, the driving gear 4 is connected with the stepping motor 6 through the reduction mechanism 5 fixed with the support base 1, and the end of the rotating sleeve 2 is provided with a driven gear 22 and the The driving gear 4 is matched;

[0024] The lens connecting sleeve 3 is radially locked with three guide nails 7,...

Embodiment 2

[0029] Embodiment two, Figure 9 As shown, the difference from the first embodiment is that the rear end of the support base 1 is provided with an assembly thread 13, which is convenient for matching with a camera with an internal thread interface.

[0030] The working principle of the present invention is: the end of the guide nail 7 can only move axially due to the restriction of the strip-shaped guide groove 111, the guide nail 7 is fixed with the lens connecting sleeve 3, and the lens 100 is mounted on the lens connecting sleeve 3 , and the guide nail 7 passes through the spiral guide hole 21 on the rotating sleeve 2. When the driving gear 4 drives the driven gear 22 on the end of the rotating sleeve 2 to rotate, the spiral guiding hole 21 on the rotating sleeve 2 will drive the guide The nail 7 moves axially, so the lens 100 moves axially following the guide nail 7 to realize automatic or manual focusing.

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Abstract

The invention discloses a focusing mechanism of a monitoring lens. The focusing mechanism comprises a supporting seat, wherein a circular through hole is formed at the middle of the supporting seat, a rotating sleeve is sleeved in the circular through hole, a lens connecting sleeve is sleeved at the middle of the rotating sleeve, at least one helical guide hole is formed on the outer circumferential surface of the rotating sleeve, at least one strip-shaped guide groove is distributed on the inner wall of the circular through hole along the axial direction, a driving gear is installed at the outer side of the supporting seat, a driven gear is arranged at the end part of the rotating sleeve to be matched with the driving gear, a guide pin is fixed on the lens connecting sleeve along the radial direction, one end of the guide pin penetrates through the helical guide hole to be matched with the guide groove; preferably, three helical guide holes are uniformly distributed along the outer circumferential surface of the rotating sleeve, and three strip-shaped guide grooves are uniformly distributed on the inner wall of the circular through hole along the axial direction; the driving gear is connected with a step motor through a retarding mechanism fixed with the supporting seat. The focusing mechanism disclosed by the invention is convenient to focus, capable of realizing automatic focusing of the monitoring lens and high in focusing precision.

Description

technical field [0001] The invention relates to a focusing mechanism of a lens, in particular to a focusing mechanism of a monitoring lens. Background technique [0002] The focus adjustment method of the traditional surveillance lens is as follows: figure 1 As shown, a support base 1a is set to be fixed to the camera, and a through hole is provided in the middle of the support base 1a. The inner surface of the through hole is provided with an internal thread to match the external thread of the lens 100, and the lens 100 is adjusted by rotating the lens 100. Focusing is achieved by adjusting the distance from the camera CCD, but this method of focusing is inconvenient to operate and cannot achieve automatic focusing, and its focusing accuracy is low due to the influence of thread pitch. [0003] On January 10, 2007, an invention patent with the patent number ZL200510016933.0 and the name "Camera Focusing Mechanism" was published, which includes motors, motor brackets, screw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B13/36G02B7/09
Inventor 吴富宝徐金龙
Owner XIAMEN LEADING OPTICS
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