JP2010271545A - Lens protection structure of lens focus driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To protect a lens from dust and damage caused by an external force. <P>SOLUTION: The lens protection structure of one type of lens focus driving device includes: one lens 60; one lens driving mechanism 20; and one protective glass 61. The lens 60 focuses a light beam on one imaging sensor, to form an image. The lens driving device is in the shape of one hollow cylinder and the lens 60 is stored in the lens driving device. The lens driving device moves the lens 60 onto a line in an optical axis direction, to focus the light beam. The protective glass 61 is installed in the lens insertion portion of the lens driving mechanism 20 and a baffle 31 having a plurality of projections is installed in the lens insertion port of the driving mechanism 20, to fixedly store the protective glass 61. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a kind of lens protection structure, and more particularly to a kind of lens protection structure for a microlens focus driving device, in which a lens protection glass and its fixing structure are installed on the front surface of the lens.

  Advances in science and technology have reduced the volume of digital cameras to a very small size, and most current mobile phones are equipped with digital camera functions. These are all due to the modularization and microfabrication of the image taking lens, and there are several types of autofocus drive structures in the microlens.

  FIG. 1 shows a three-dimensional exploded view of one known lens focus drive. The structure includes one top cover 10, one bottom cover 11, one lens holder 12 and one outer frame 13, and four magnets 14 are fitted in the periphery of the outer frame 13. A screw thread 15 is installed in the lens holder 12 so that one lens 16 can be screwed. One coil 17 is fitted and installed on the outer periphery of the lens holder 12, and the lens holder 12 can move in the center of the four magnets 14 in the outer frame 13. The lens holder 12 and the lens 16 are brought into an auto-focusing operation by mutual repulsion or suction. The lens holder 16 is supported at the center of the four magnets 14 by one upper leaf spring 18 and one lower leaf spring 19.

  The known lens focus driving device has an opening on the front surface so that the lens 16 can be screwed into the lens holder 12, and in general, any of the lens focus driving devices is outside the photographing device (for example, a mobile phone or a camera). One translucent flat lens (for example, glass) is installed on the case to protect the lens. However, it is inevitable that the lens is damaged or soiled by external force during the assembly process of the semi-finished product. However, if one glass plate can be installed directly in the opening of the lens focus drive device to protect the lens, the lens can be protected from damage and dust throughout the entire assembly process of the semi-finished product. Since it is not necessary to install the camera, the cost of the camera can be reduced, and further, the thickness of the photographing apparatus (for example, a mobile phone) can be reduced.

The inventor of the present plan designed a better lens protection structure in which the lens protection glass is fixed to the lens insertion port of the microlens focus driving device by a fixing mechanism in accordance with the above-described requirements.

  An object of the present invention is to provide a lens protection structure of a microlens focus driving device that protects a lens from impact and dust during assembly of a semi-finished product and during semi-finished product.

  A further object of the present invention is to eliminate the need for a flat lens of a photographing apparatus using a microlens focus driving device having a lens protection mechanism, thereby reducing the thickness and production cost of the entire device. It is to provide a lens protection structure.

  In order to achieve the above object, the lens protection structure of the present invention comprises one lens, one lens driving mechanism, and one protective glass. Among them, the lens focuses the light beam on one image sensor and forms an image. The lens driving device has a single hollow cylindrical shape, in which the lens can be accommodated, and the lens is moved on the optical axis line to focus the light beam. The translucent glass is installed at the lens insertion port location of the lens driving mechanism, and a plurality of protruding baffles are installed at the lens insertion port location of the driving mechanism to fix and store the protective glass.

  FIG. 2 is a three-dimensional exploded view of the lens focus driving apparatus according to the first embodiment of the present invention. The lens focus driving device of the present invention includes one lens 60, one lens driving mechanism 20 and one protective glass 61, of which one outer cover 21 and one bottom cover 22 are included in the lens driving mechanism 20. The outer cover 21 and the bottom cover 22 are combined to form one storage space, and one upper cover 30, one holder 40, and one base 50 are included therein. The pedestal 50 has a single hollow cylindrical shape, in which the lens 60 can be accommodated, and the outer periphery of the pedestal 50 is covered with a coil 51. The pedestal 50 can move on the vertical line in the optical axis direction at the center of the holder 40 in the hollow, and the magnetic component 41 is also housed and installed on the four circumferences of the holder 40.

  The pedestal 50 and the holder 40 are connected by at least one elastic component 45, and a relatively good method is that there are two sets of upper and lower elastic components 45. The elastic part 45 is connected to the outer peripheral fixing part 46 and the inner active part 47 by thin lines forming a plurality of irregular hollows. The fixing unit 46 is connected to the holder 40, and the active unit 47 is connected to the pedestal 50, and the pedestal 50 is moved up and down on the optical axis direction line at the center of the holder 40 by the elastic component 45.

  When a current passes through the coil 51 and a magnetic field is generated, the magnetic component 41 on the holder 40 is attracted and repelled, the pedestal 50 and the lens 60 are moved on the optical axis direction line, and the light beam is moved to one by the lens. The image sensor (not shown in the figure) is focused and imaged on the image sensor.

  As shown in the first embodiment of FIG. 2, the protective glass 61 is installed at the lens 60 insertion port location of the lens driving mechanism 20, and a plurality of protruding baffles 31 are installed on the upper cover 30. One accommodation area is formed, and the protective glass 61 is accommodated and installed. As a relatively good method, the protective glass 61 and the accommodation installation area can be rectangular, rectangular, circular, octagonal or other polygonal.

  The outer cover 21 can be made of a metal material, and can isolate electromagnetic interference generated by energization of the coil. The same opening as the baffle 31 accommodation installation area is installed at the top of the head, and the lens 60 can be installed in the lens driving mechanism 20 after the outer cover 21 is assembled. As a result, the lens 61 can be protected.

  As a relatively good method, the baffle 31 can be plate-shaped or columnar. FIG. 3 is a partially three-dimensional exploded view of the second embodiment of the present invention, as long as it surrounds the accommodation installation area and can restrict or fix the protective glass 61. The protective glass 61 is a glass lens or plastic glass, transparent. Can be acrylic.

  As a relatively good method, the protective glass 61 can be adhesively fixed in the lens housing installation area formed by the baffle 31 with an adhesive. Alternatively, a recessed layer for fitting can be provided on the baffle 31. FIG. 3 is a partially enlarged view of the baffle, but it is not necessary to use an adhesive by fixing the protective glass 61.

  Please refer to FIG. This is an application diagram of some embodiments in which the present invention is installed in one photographing apparatus. Since the present invention can be installed on the photographing apparatus 100 (for example, a mobile phone) and the protective glass 61 is already installed to protect the lens 60, one through hole 102 is formed on the case 101 of the photographing apparatus 100. It only needs to be installed and does not require a protective lens. By fitting the baffle 31 into the through hole 102, the lens driving mechanism 20 of the present invention is fixed on the case 101 of the photographing apparatus 100. It is also possible to delete the outer cover 21 and replace it with the case 101 of the photographing apparatus 100. In the embodiment shown in FIG. 4, the present invention can further eliminate screw connection with the image capturing apparatus 100 or other connection positioning structure. Therefore, the thickness of the lens focusing device can be further reduced.

  The present invention can be easily mounted on the photographing apparatus 100 and can also reduce the cost of the photographing apparatus. Further, since the photographing apparatus 100 does not require a protective lens, the thickness can be further reduced, and the apparatus 100 can be considerably competitive for application to an increasingly thin mobile phone.

Moreover, the protective glass 61 of this invention can also be designed on a cap. In the third embodiment shown in FIG. 5, the protective glass 61 is directly covered with the baffle 31. The baffle 31 can also be designed in a columnar shape as in the fourth embodiment shown in FIG. 6, and can be fitted and fixed on the baffle 31 by installing opposing fitting holes on the protective glass 61.

FIG. 1 is an exploded view of a known lens focus driving device. FIG. 2 is a three-dimensional exploded view of the first embodiment of the lens focusing apparatus according to the present invention. FIG. 3 is a partially exploded view of the second embodiment of the present invention. FIG. 4 is an application diagram of a part of the embodiment in which the present invention is attached to one photographing apparatus. FIG. 5 is a diagram showing a third embodiment of the present invention. FIG. 6 is a diagram showing a fourth embodiment of the present invention.

DESCRIPTION OF SYMBOLS 10 Top cover 11 Bottom cover 12 Lens holder 13 Outer frame 14 Magnet 15 Thread 16 Lens 17 Coil 18 Upper leaf spring 19 Lower leaf spring 20 Lens drive mechanism 21 Outer cover 22 Bottom cover 30 Upper cover 31 Baffle 40 Holder 41 Magnetic component 45 Elastic part 46 Fixing part 47 Activity part 50 Base 51 Coil 60 Lens 61 Protective glass 100 Imaging device 101 Case 102 Through-hole

Claims (7)

A lens protection structure of a kind of lens focus driving device, and the lens focus driving device can be installed on one photographing device. For that,
One lens that focuses light onto one image sensor to form an image,
Presenting one hollow cylinder, the lens can be installed in it, and the lens is moved on the optical axis direction line to focus the light beam, and installed at the lens insertion port location of the drive mechanism One protective glass is included, and a plurality of projecting baffles are installed at the lens insertion port location of the drive mechanism to accommodate and fix the protective glass.   The lens protection structure according to claim 1, wherein the protective glass is one glass lens, one plastic glass, or transparent acrylic. The lens protection structure according to claim 1, wherein the baffle forms a plate shape or a column shape.   The lens protection structure according to claim 1, wherein a concave layer for fitting is installed on the baffle, thereby positioning the protective glass.   The protective lens does not need to be installed on the case of the photographing apparatus, and only one through-hole may be installed, and the baffle is fitted into the through-hole, thereby fixing and positioning. Lens protection structure.   The lens protection structure according to claim 1, wherein the protective glass has a cap shape and can cover the baffle.   The lens protection structure according to claim 1, wherein fitting holes that are opposed to the plurality of baffles are provided on the protective glass, and can thereby be fitted and fixed to the baffles.

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