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Linear guide groove gap eliminating structure of cam zoom optical system

An optical system and variable focal length technology, applied in optics, optical components, instruments, etc., can solve the problems of high processing cost and unfavorable batch production, and achieve the effects of low processing accuracy requirements, favorable batch production, and simple structure adjustment

Pending Publication Date: 2022-07-08
苏州东方克洛托光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the accuracy of the cam is mainly guaranteed by processing, and the matching gap between the guide groove and the guide nail system is mainly ensured by matching to ensure the matching accuracy. The processing cost is high, which is not conducive to mass production.

Method used

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  • Linear guide groove gap eliminating structure of cam zoom optical system
  • Linear guide groove gap eliminating structure of cam zoom optical system
  • Linear guide groove gap eliminating structure of cam zoom optical system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like figure 1 As shown, the linear guide groove anti-backlash structure of the cam zoom optical system of the present invention includes a component support plate 11, three eccentric shaft assemblies 12, 13, 14 with the same structure, and the three eccentric shaft assemblies are sequentially installed on the component support plate 11. superior.

[0027] like figure 2 As shown, taking the eccentric shaft assembly 12 as an example, the eccentric shaft assembly includes an eccentric shaft seat 121, an eccentric shaft 122, a guide groove bearing 123, a bearing compression washer 124, and a bearing compression nail 125; the eccentric shaft seat 121 is composed of an integral disc-shaped upper part 1211 and a lower center shaft 1212. The center shaft 1212 is installed in the matching hole of the component support plate 11 and can rotate around the axis of the matching hole; Press and fix the disc-shaped upper part of the eccentric shaft seat 121; the eccentric shaft 122 ...

Embodiment 2

[0030] like Figure 6a , Figure 6bAs shown, the difference between this embodiment and Embodiment 1 is that the eccentric shaft seat is composed of a support shaft 1213 and a crank 1214; the upper part of the support shaft 1213 is cylindrical, and is fixed on the component support plate 11 through the lower connecting rod The shaft hole at one end of the crank 1214 is matched with the upper part of the support shaft 1213, which can be rotated around the support shaft 1213 and fixed by screws 1215; the eccentric shaft 122 is fixed at the other end of the crank 1214. The rest of the structure is the same as that of Example 1.

[0031] During installation, turn the crank 1214 of each eccentric shaft assembly to make two of the guide groove bearings in close contact with the lower elevation of the linear guide groove 211, and one of the guide groove bearings and the upper elevation of the linear Screws fix each crank. At this time, the carriage assembly 22 cannot rotate around...

Embodiment 3

[0033] like Figure 7a ~ Figure 7c As shown, the difference between this embodiment and Embodiment 1 is that the eccentric shaft seat adopts a crank 1214, and the rotating shaft below one end of the crank 1214 is installed in the matching hole of the component support plate 11, and can rotate around the axis of the matching hole; An arc-shaped through slot 1216 is machined on the 1214 , and the locking screw 1217 passes through the arc-shaped through slot 1216 and is threadedly connected to the component support plate 11 ; the eccentric shaft 122 is fixed on the other end of the crank 1214 . The rest of the structure is the same as that of Example 1.

[0034] During installation, turn the cranks 1214 of each eccentric shaft assembly so that two of the guide groove bearings are in close contact with the lower surface of the linear guide groove 211, and one guide groove bearing is in close contact with the upper surface of the linear guide groove Tighten screws 1217 to fix each...

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Abstract

The invention relates to a linear guide groove anti-backlash structure of a cam varifocal optical system. Three eccentric shaft assemblies of the structure are sequentially installed on an assembly supporting plate. In the eccentric shaft assembly, an eccentric shaft base is installed on an assembly supporting plate and can rotate around the rotating axis of the eccentric shaft base and be fixed. The eccentric shaft is fixed on the eccentric shaft seat; the axis of the eccentric shaft deviates from the rotating axis of the eccentric shaft seat; the guide groove bearing is sleeved on the eccentric shaft; the assembly supporting plate is fixed on the outer circumferential surface of a sliding frame assembly of the cam varifocal optical system; a guide groove bearing and a driving guide nail of each eccentric shaft assembly are positioned in a linear guide groove of the lens cone; meanwhile, the nail guide roller is positioned in a cam groove of the cylindrical cam; and by adjusting the angle of each eccentric shaft seat, two guide groove bearings can be in close contact with the lower vertical surface of the linear guide groove, and the other guide groove bearing can be in close contact with the upper vertical surface of the linear guide groove. According to the invention, the problems of backlash and poor repeated positioning precision in the zooming process of the cam zoom optical system are solved.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and relates to a straight-line guide groove anti-backlash structure of a cam zoom optical system. Background technique [0002] The continuous zoom optical system can adjust the relative position of the zoom group in the optical system according to the size of the imaged object and the distance, thereby changing the magnification of the optical system. With the precise adjustment of the compensation group or the position of the focal plane, a suitable target image size can be obtained and good imaging sharpness can be guaranteed. Therefore, the continuous zoom optical system is widely used in the fields of target tracking, recognition and detection. [0003] The positional accuracy of the moving parts in the zoom optical system directly affects the imaging performance of the optical system. The zoom optical system can be divided into two categories: linear motor drive and cam drive acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/04
CPCG02B7/04
Inventor 王健赵华鹤孙金霞
Owner 苏州东方克洛托光电技术有限公司