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Automatic zoom lens focusing device

A technology for automatic zooming and photographing devices, which is applied to focusing devices, focusing devices, focusing devices of cameras, etc., and can solve the problem that the volume of the lens 1 cannot be reduced.

Inactive Publication Date: 2004-04-21
LITE ON TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, the volume of the existing automatic zoom lens is limited by the volume of the motor 5, so that the volume of the entire lens 1 cannot be reduced

Method used

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  • Automatic zoom lens focusing device
  • Automatic zoom lens focusing device
  • Automatic zoom lens focusing device

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0012] The present invention is an automatic zoom device used in a photographic device, such as a camera or video camera. figure 1 and figure 2 It is a top view and an exploded view of the automatic zoom device of the embodiment of the present invention, respectively. This embodiment includes a lens 11 , a first position device 21 , a second position device 23 , a magnet 25 and a coil 27 .

[0013] like figure 1 and figure 2 As shown, the first positioning element 21 is arranged in the camera device, and its position is fixed. The second positioning element 23 is used for connecting the lens 11 and engaging with the first positioning element 21 . Therefore, when the second positioning element 23 rotates, the second positioning element 23 can move axially along the first positioning element 21, that is, figure 1 direction indicated by the arrow. In this way, the second positioning element 23 can further drive the lens 11 forward or backward, change the position of th...

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PUM

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Abstract

The device comprises a lens, the first positioning element, the second positioning elemenet, a magnetic iron and a coil, of which the second positioning element is connected to the lens and engaged with the first one, the magnetic iron is connected to the second positioning elements as well as the coil is set at housing washer of the magnetic iron. When the coil is led in with current, the rotation of the magnetic iron can be carried on under action of magnetic force induced by current on the coil and furthermore to bring the second positioning element to rotate. When the second positioning element is rotated, it is moved along the first one and furthermore to bring the lens to move for ward or backward in order to achieve the aim of lens position being moved.

Description

technical field [0001] The invention relates to an automatic zoom device, in particular to an automatic zoom device for a photographic device. Background technique [0002] The zoom lens (zoom lens) in the traditional photography device includes manual zooming and mechanical automatic zooming. Manual zoom is to focus by manually rotating the lens so that the lens extends forward or retracts backward. The automatic zoom generally adds a driving device beside the lens, such as a motor, and uses the driving device to drive the lens to move. [0003] image 3 It is an automatic zoom device of the prior art. The automatic zoom device includes a lens 1 , an extension 3 , a motor 5 and a screw 7 . The extension 3 extends from the lens 1 and has an opening (not shown) for the screw 7 to engage with. In this way, the screw 7 can be connected to the lens 1 through the extension part 3 . The motor 5 drives the screw rod 7 to rotate. In this way, when the screw 7 rotates, the lens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B13/34
Inventor 洪铭德
Owner LITE ON TECH CORP