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Lens driving device and camera module mounted with lens driving device, and mobile telephone

A technology of lens driving device and lens unit, which is applied in installation, TV, electrical components, etc., and can solve problems such as difficulty in adjustment, hindrance to the movement of the bracket, and increase in the number of parts

Inactive Publication Date: 2012-08-15
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, it is necessary to form a "cutout" on the guide part to "accommodate" the "torsion spring", so fine processing is required, and a special torsion spring needs to be added, which increases the number of parts
In addition, since "the lens holder is urged in a direction perpendicular to the optical axis by the urging force from both ends of the torsion spring, and the lens holder is biased against the peripheral surface of the guide shaft", it is difficult to adjust the "urging force".
Especially when it is applied to a small lens unit used in a mobile phone, when the force applied by the torsion spring is too strong, it may itself hinder the movement of the holder.

Method used

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  • Lens driving device and camera module mounted with lens driving device, and mobile telephone
  • Lens driving device and camera module mounted with lens driving device, and mobile telephone
  • Lens driving device and camera module mounted with lens driving device, and mobile telephone

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0041] Hereinafter, an embodiment of a mobile phone embodying the mobile phone of the present invention will be described with reference to the drawings.

[0042] Such as figure 1 As shown, the mobile phone is a mobile phone with a folded structure centered on a hinge H. figure 1 It is a figure showing the folded state, and the glass cover 9 which is a part of a camera module is exposed on the front surface. figure 2 (a) is a figure which opened this mobile phone and made the display part 81 and the operation part 82 the front. figure 2 (b) is the figure which looked at the mobile phone opened from the back. With the mobile phone opened in this way, the photographer points the glass cover 9 toward the subject to be photographed, and operates the operation unit 82 while confirming the image on the display unit 81 , whereby the subject can be photographed by pressing the shutter.

[0043] Next, refer to image 3 , the configuration of a camera module when the lens drivin...

no. 2 approach

[0068] Next, refer to Figure 7 , the second embodiment of the mobile phone embodying the present invention will be described. In addition, since the second embodiment is a structure in which only the structure of the holder 10 of the first embodiment, especially the structure of the main shaft guide 15 is changed, a detailed description of the same parts will be omitted.

[0069] In the second embodiment, such as Figure 7 As shown, the spindle guide 15 is changed to a groove extending along the optical axis of the holder 10 , and the spindle guide 15 is formed as a through hole extending along the optical axis of the holder 10 . In this case, the cross-sectional shape of the surface perpendicular to the optical axis direction of the main shaft guide 15 is also a shape including a V-shape, and the apex of the V-shape faces in the direction of the force 1 / 2F in the direction perpendicular to the optical axis direction. Protrudes in the opposite direction. Therefore, similar...

no. 3 approach

[0072] Next, refer to Figure 8 , the third embodiment of the mobile phone embodying the present invention will be described. In addition, since the third embodiment is a structure in which only the structure of the holder 10 of the first and second embodiments, especially the structure of the main shaft guide 15 is changed, detailed description of the same parts will be omitted.

[0073] Such as Figure 8 As shown, in the third embodiment, the spindle guide portion 15 is formed as a through hole extending in the optical axis direction of the holder 10 . In addition, in the cross-sectional shape of the surface perpendicular to the optical axis direction of the main shaft guide 15, three sliding contact portions 15a, 15b, 15c are formed by the inner peripheral surface of the through hole protruding toward the central axis direction of the through hole. Therefore, as a result, even if there is no force 1 / 2F in the direction perpendicular to the optical axis direction described...

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Abstract

Disclosed is a lens driving device having a simple structure and capable of preventing during movement of the holder rattling caused by repeated contact and separation of a sliding area and a shaft. The lens driving device is provided with a holder which holds a lens unit and which is capable of movement in the direction of the optical axis of said lens unit, and a cylindrical shaft (51) disposed extending in the direction of the optical axis of the aforementioned lens unit. Provided in the aforementioned holder (10) is a guide unit (15) which, during movement of the aforementioned holder (10), slides on the lateral surface of the aforementioned shaft (51) and guides the direction of movement of the aforementioned holder in the optical axis direction of the lens unit. The aforementioned guide unit (15) is provided with multiple sliding areas (15a, 15b) which, during movement of the aforementioned holder, constantly and continuously slide on the same position on the lateral surface of the aforementioned shaft.

Description

technical field [0001] The present invention relates to a lens drive device that moves a lens module in the direction of the optical axis by being guided by a shaft disposed along the direction of the optical axis, a camera module, and a mobile phone equipped with the lens drive device. Background technique [0002] In recent years, the technique of mounting a camera module in a mobile phone has become widespread. Since it is difficult to manually focus such a camera module, an autofocus function (autofocus) becomes an essential function. A lens driving device is used for automatic focusing of the camera module. On the other hand, along with thinning and miniaturization of mobile phones, there is an increasing demand for reducing the space provided for the lens driving device. In order to meet this demand, as a structure for driving the lens unit of the lens drive device, for example, a structure using a moving magnet type linear drive system is often employed. It is know...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/04H04N5/225
CPCG02B7/023G02B7/08H04N23/57
Inventor 大石杰山下博司中岛三生
Owner SANYO ELECTRIC CO LTD