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Lens module and projector

A technology of lens modules and lens barrels, which is applied in projection devices, installation, optics, etc., can solve problems such as poor imaging quality and lens imaging, and achieve the effect of eliminating lens position movement errors and improving imaging quality

Inactive Publication Date: 2014-12-03
QISDA OPTRONICS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the fixed-focus lens, the zoom lens can perform infinite zoom, and can meet the needs of different framing without changing the lens. However, the combination of changes in the mechanical structure puts forward higher requirements for precision. Small combination differences, such as spiral Combined gap displacement and mutual pressure caused by errors in component manufacturing or assembly will cause eccentricity and axial backlash of the lens assembly, resulting in poor imaging quality; in addition, the focus ring of the existing design directly and If the focusing column is in contact, it is easy to cause lens imaging

Method used

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  • Lens module and projector
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  • Lens module and projector

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Embodiment Construction

[0025] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

[0026] refer to Figure 1 to Figure 6 As shown, a schematic structural diagram of an embodiment of the lens module of the present invention is disclosed, including a lens barrel 1, a focus ring 2, and a focus column 12. The focus ring 2 is movably sleeved on the lens barrel 1 to adjust the The focus column 12 drives the lens barrel 1 to move. Further, the lens module also includes a lens, which is arranged in the lens barrel 1. When the focus ring 2 rotates, it drives the focus column 12 to rotate. The focus column 12 drives the lens barrel 1 to rotate, and the lens barrel 1 rotates to drive the lens to move along the optical axis.

[0027] The lens barrel 1 has a first side wall 101, a second side wall 102, and a fourth side wall 11. The fourth side wall 11 is the o...

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Abstract

The invention provides a lens module and a projector. The lens module comprises a lens barrel, a focusing ring and a focusing column. The focusing ring is movably arranged on the lens barrel in a sleeved mode. The focusing column is adjusted to drive the lens barrel to move. The lens barrel is provided with a first side wall and a second side wall. The focusing ring is provided with a first end face, a second end face and a third side wall. A containing space is formed in the third side wall. The focusing ring is arranged between the first side wall and the second side wall. The first end face abuts against the first side wall. The second end face abuts against the second side wall. The focusing ring is limited from moving in the direction of an optical axis. The focusing column is contained in the containing space, and the containing space makes no contact with the focusing column. The lens module can avoid influence on a lens from pressing among the components or clearance displacement.

Description

technical field [0001] The invention relates to the field of projection devices, in particular to a lens module with a focal length adjustment device. Background technique [0002] At present, the zoom lens has been widely used in projection products. The zoom lens can change the focal length within a certain range, so as to obtain different wide and narrow field of view angles, different size images and different scene ranges. For the convenience of use, a focus ring is set on the zoom lens, and the focus column is driven to rotate by rotating the focus ring, and the focus column drives the lens barrel in the lens module to rotate, and the lens barrel drives the lens to move along the optical axis. Change the relative position of the focal point, thereby changing the size of the focal length. Compared with the fixed-focus lens, the zoom lens can perform infinite zoom, and can meet the needs of different framing without changing the lens. However, the combination of changes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/04G02B15/00G03B21/14
Inventor 柯延锋胡圣文萧启宏何文中林颖芳
Owner QISDA OPTRONICS (SUZHOU) CO LTD