JP2015018268A - Resonance suppression method for camera shake prevention autofocus module and structure therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resonance suppression method of a camera shake prevention autofocus module and its structure.SOLUTION: The resonance suppression method of the camera shake prevention autofocus module includes following steps of: installing an autofocus structure having a lens mounting sheet and a frame where a lens is mounted on the lens mounting sheet, and a focus operation is executed along an optical axis direction; installing a camera shake prevention structure having a lens frame and a mounting substrate where a correction lens is disposed in the lens frame, and an image correcting operation is executed, and the lens mounting sheet is connected to the lens frame; adding at least one oscillation absorbing materials between the lens frame and the mounting substrate; and allowing the lens mounting sheet to absorb oscillation generated by the autofocus operation, and allowing the lens frame to absorb oscillation generated in the image correcting operation by using the oscillation absorbing materials, and allowing the lens mounting sheet and the lens frame to suppress resonance generated by the operation.

Description

  The present invention relates to a kind of resonance suppression method and structure of an anti-shake autofocus module, and more particularly, can suppress resonance that occurs during movement between an anti-shake structure and a lens autofocus structure, and an external environment. The present invention relates to a method of stabilizing the operation of the whole camera shake preventing autofocus module by suppressing resonance that occurs alternately with the vibration frequency of the control IC and the control frequency of the control IC.

  Due to the trend of deploying shooting functions on handheld devices, they are also increasingly used in high-level handheld devices with anti-shake functions. For this reason, there are a large number of patent documents relating to an autofocus module having an anti-shake function, for example, Patent Document 1, Patent Document 2, Patent Document 3 and the like by the present applicant.

  However, the autofocus structure of the lens generates a slight vibration phenomenon when moving to a stereo position during focusing, and then slowly shifts from dynamic to static. The time required from the dynamic state to the static state is referred to as a response time. The applicant of the present application has also applied for Patent Document 4 in order to suppress the vibration phenomenon on the autofocus module and shorten the response time.

US Patent Application No. 7,881,598 Japanese Patent Application No. 2010-67520 Japanese Patent Application No. 2010-250454 US Patent Application No. 7,590,342

  However, even in the anti-shake structure, a slight vibration phenomenon can occur due to the image movement correction operation, and at the time of shooting, the focus operation and the anti-shake operation are performed at the same time. The anti-shake structure and the autofocus structure can also generate resonance alternately between the control frequency of the control IC and the vibration frequency of the external environment. Module revocation or anomalies can result.

  For example, in a running car, the vibration frequency of the car, the vibration frequency of the hand when shooting while holding the camera, the focus vibration frequency of the autofocus structure, and the image correction vibration frequency of the anti-shake structure When four types of vibration frequencies occur at the same time, vibration frequencies approaching each other can induce a resonance mode, which makes the whole anti-shake autofocus module unable to operate accurately and expires.

  Such a resonance mode has a very large influence on the operation of the whole camera shake prevention autofocus module. Therefore, it is necessary to suppress such a resonance mode, whereby the whole camera shake autofocus module can be normally operated. Accordingly, the inventor of the present application provides a resonance suppression method and a structure thereof for a type of anti-shake autofocus module and absorbs vibration by adding a vibration absorbing material to the autofocus structure and the anti-shake structure, respectively. , Suppress the resonance phenomenon that may occur.

A main technical feature of the present invention is a method for suppressing resonance of an anti-shake autofocus module.
A lens placement sheet and a frame, the lens placement sheet placing a lens and performing a focusing operation along a light axis direction;
A lens frame and a mounting substrate, a correction lens is disposed on the lens frame to perform an image correction operation, and the lens mounting sheet is connected to the lens frame;
Adding at least one vibration absorbing material between the lens frame and the mounting substrate;
Using the vibration absorbing material, the lens mounting sheet absorbs vibration generated by an autofocus operation, and the lens frame absorbs vibration generated by an image correction operation, and the lens mounting sheet and the lens A method for suppressing resonance generated by an operation of a frame, and a method for suppressing resonance of an anti-shake autofocus module, comprising the steps described above.

The next technical feature of the present invention is an anti-shake autofocus module that suppresses resonance.
An autofocus structure comprising a lens placement sheet and a frame, the lens placement sheet placing a lens and performing a focusing operation along a light axis direction;
An anti-shake structure comprising a lens frame and a mounting substrate, wherein a correction lens is disposed on the lens frame to perform an image correction operation, and the lens mounting sheet is connected to the lens frame;
Applied between the lens frame and the mounting substrate, the lens mounting sheet absorbs vibrations generated by an autofocus operation, and the lens frame absorbs vibrations generated by an image correction operation. At least one vibration-absorbing material that suppresses resonance that may occur due to the operation of the lens mounting sheet and the lens frame;
An autofocus module for preventing camera shake characterized by comprising

  The present invention provides a kind of anti-shake autofocus module resonance suppression method and structure thereof, which can suppress the resonance that occurs during movement between the anti-shake structure and the lens autofocus structure, as well as externally. This is a method and a structure that suppresses resonance that alternately occurs between the vibration frequency of the environment and the control frequency of the control IC, and stabilizes the operation of the whole camera shake prevention autofocus module.

It is a three-dimensional exploded view of an embodiment of the anti-shake autofocus module of the present invention. It is side surface sectional drawing of 1st Example of the autofocus structure of this invention, and a camera-shake prevention structure. It is side surface sectional drawing of 2nd Example of the camera-shake prevention structure of this invention. It is a solid example sectional drawing which used the elastic piece of this invention as the flexible component. It is a three-dimensional view of the Example of the elastic piece of this invention. It is side surface sectional drawing of 3rd Example of the camera-shake prevention structure of this invention. It is side surface sectional drawing of 4th Example of the camera-shake prevention structure of this invention.

  In order to describe in detail the technical contents, structural features, and objects to be achieved of the present invention, examples will be described below in combination with the drawings.

  FIG. 1 is an exploded view of an embodiment of an anti-shake autofocus module according to the present invention. The anti-shake autofocus module of the present invention includes at least an outer frame 10, an autofocus structure 20, an anti-shake structure 30, and an image detection element 40, of which the autofocus structure 20 and the anti-shake structure 30 are included. The image detecting element 40 is located on one light axis direction.

  Among these, the outer frame 10 is provided with an upper plate 11. The autofocus structure 20 mounts the lens 21 and can execute an autofocus operation along the light axis direction (z-axis), thereby focusing the image on the image detection element 40. The camera shake preventing structure 30 performs an image correction operation in a direction (x axis or y axis) perpendicular to the light axis direction (z axis). The image detection element 40 is provided on the mounting substrate 41.

  The resonance suppression method of the present invention mainly includes two parts. The first part is suppression of vibration generated when the autofocus structure 20 performs a focus operation, and the parts of the autofocus structure 20 include a first movable part and a first immovable part. In the present invention, at least one vibration absorbing material such as a soft gel, a soft spring, a soft rubber or a vibration absorbing rubber tape is added between the first movable portion and the first non-movable portion, and the vibration absorbing material is used. Then, the first movable part absorbs vibrations generated during operation, thereby suppressing resonance that may occur due to the operation of the first movable part. One example will be described below.

  The second portion suppresses vibrations that occur when the anti-shake structure 30 performs an image correction operation. The parts of the anti-shake structure 30 can be divided into a second movable part and a second non-movable part, and at least one vibration absorbing material, for example, a soft material between the second movable part and the second non-movable part. Add gel, soft spring, soft rubber or vibration absorbing rubber tape, etc., and use this vibration absorbing material to absorb the vibration generated by the second movable part during operation, thereby generating the second movable part operation. Suppress the resonance that you get. Hereinafter, three examples will be described.

  Please refer to FIG. FIG. 2 is a side sectional view of the first embodiment of the present invention. Also refer to FIG. In the present embodiment, the first movable portion of the autofocus structure 20 carries the autofocus operation with the lens 21 placed thereon. Preferably, the autofocus structure 20 includes at least a lens mounting sheet 22 and a frame 23. The lens 21 is attached to the center of the lens mounting sheet 22, and the lens mounting sheet 22 is surrounded by a coil 24. The lens mounting sheet 22 and the coil 24 are both of the first movable part. It is considered as a part.

  Among them, the lens mounting sheet 22 is accommodated in the center of the frame 23, and four magnetic elements 25 are fitted on the side edges of the frame 23, corresponding to the outside of the coil 24, and these magnetic elements 25 are The lens 24 is not in contact with the coil 24, and the lens mounting sheet 22 and its connecting parts are both the first immovable parts.

  Among them, the vibration absorbing material is added between the side edge of the magnetic element 25 and the coil 24, that is, between the first movable part and the first non-movable part. A plurality of receiving grooves (not shown) are provided at the edges to receive the vibration absorbing material 50, and the vibration absorbing material 50 is connected between the frame 23 and the coil 24.

  In the first embodiment of the camera shake preventing structure of the present invention, the outer frame 10 is a second immovable part of the camera shake preventing structure, and the outer frame 10 is formed of the autofocus structure 20 and the image detecting element 40. Connect to the mounting substrate 41.

  A lens frame 31 and a correction lens 32 are disposed on the second movable part of the anti-shake structure 30, and between the second movable part and the second non-movable part by at least one flexible component. In this embodiment, it is connected between the lens frame 31 and the upper plate 11 of the outer frame 10. Preferably, the flexible component is four suspension lines 33 or one elastic piece, The correction lens 32 is suspended above the image detection element 40 so as to correspond to the light axis direction so that an image shift caused by camera shake can be corrected.

  Preferably, the anti-shake structure 30 further includes a magnet assembly 34 and a coil assembly 35. The magnet assembly 34 includes at least one x-axis magnet 34x and at least one y-axis magnet 34y, and the coil assembly 35 includes at least one x-axis coil 35x and at least one y-axis coil 35y. And the coil assembly 35 corresponds to the magnet assembly 34 but is not in contact with it.

  One of the magnet assembly 34 and the coil assembly 35 is connected to a part of the second movable part, and the other is connected to a part of the second non-movable part. The vibration absorbing material 50 is added between the magnet assembly 34 and the coil assembly 35 corresponding to each other, and the vibration absorbing material 50 suppresses resonance that can be generated by the second movable portion.

  Please refer to FIG. FIG. 3 is a side sectional view of a second embodiment of the camera shake preventing structure of the present invention. Also in this embodiment, the outer frame 10 is the second immovable part of the anti-shake structure 30, and the outer frame 10 is connected to the mounting substrate 41 of the image detection element 40, and the autofocus structure is provided therein. 20 are accommodated.

  The anti-shake structure 30 further includes at least one flexible part, and the flexible part is connected between the second movable part and the second non-movable part. In this embodiment, the flexible part is: Connected between the autofocus structure 20 and the upper plate 11 of the outer frame 10, in particular, the first immovable part of the autofocus structure 20 is the second movable part of the camera shake preventing structure 30.

  Preferably, the flexible part has four suspension lines 33 (as shown in FIG. 3) or one elastic piece 36 (as shown in FIG. 4). FIG. 4 is a three-dimensional sectional view of the flexible part. is there. The elastic piece 36 suspends the autofocus structure 20 in the direction of the optical axis inside the outer frame 10, and the first non-movable portion of the autofocus structure 20 serves as the second movable portion.

  FIG. 5 is a three-dimensional view of an embodiment of the elastic piece 36. The elastic piece 36 includes an outer peripheral fixing part 361, an outer layer active part 362, and an inner layer active part 363. Among these, the outer periphery fixing portion 361 is fixedly connected to the upper plate 11 of the outer frame 10. The outer layer active part 362 is provided inside the inner peripheral edge of the outer peripheral fixing part 361 and has slots each having a U shape in plan view so that the U-shaped openings face each other. The outer layer active part 362 is connected to the outer periphery fixing part 361 by two sets of symmetrically arranged first fulcrums 364, and the inner layer active part 363 is provided inside the inner peripheral edge of the outer layer active part 362, and is viewed in plan view. The U-shaped slots are arranged so that the U-shaped openings face each other, and are provided at a 90-degree angle with respect to the U-shaped slot of the outer layer active portion 362, and the first fulcrum Two sets of second fulcrums 365 provided at a 90-degree angle position with respect to 364 are connected to the outer layer active portion 362, and the inner layer active portion 363 is connected to the autofocus structure 20.

  In addition, please refer to FIG. Among them, the outer layer activity unit 362 causes the autofocus structure 20 to perform the x-axis movement for tilting and swinging, and the inner layer activity unit 363 causes the autofocus structure 20 to perform the y-axis movement for tilting and swinging.

  Preferably, the anti-shake structure 30 further includes a magnet assembly 34 and a coil assembly 35, wherein the magnet assembly 34 includes at least one x-axis magnet and at least one y-axis magnet. 35 includes at least one x-axis coil and at least one y-axis coil, and corresponds to the magnet assembly 34 but is non-contact.

  One of the magnet assembly 34 and the coil assembly 35 is connected to the outer frame 10 or a connecting component thereof to be a component of the second immovable part, for example, a mounting substrate 41 of the image detection element 40, The other is connected to the autofocus structure 20 to be a part of the second movable part, and the vibration absorbing material 50 is added while the magnet assembly 34 and the coil assembly 35 correspond to each other.

  See FIG. FIG. 6 is a side sectional view of a third embodiment of the camera shake preventing structure of the present invention. Also in this embodiment, the upper plate 11 in FIG. 1 is the first immovable part of the autofocus structure 20, and the outer frame 10 is connected to the autofocus structure 20.

  The anti-shake structure 30 further includes at least one flexible part, and the flexible part is connected between the second movable part and the second non-movable part. In the present embodiment, the flexible component is connected between the mounting substrate 41 of the image detection element 40 and the upper plate 11 of the outer frame 10. Preferably, the flexible component is formed as four suspension lines 33 or one elastic piece, and is used to suspend the mounting substrate 41 in the light axis direction below the autofocus structure 20. Thereby, the mounting substrate 41 becomes the second movable portion.

  Preferably, the anti-shake structure 30 further includes a magnet assembly 34 and a coil assembly 35. Wherein the magnet assembly 34 includes at least one x-axis magnet and at least one y-axis magnet, the coil assembly 35 includes at least one x-axis coil and at least one y-axis coil, and the magnet assembly 34 corresponds to each other but is not contacted.

  One of the magnet assembly 34 and the coil assembly 35 is connected to the outer frame 10 or a connecting part thereof, for example, the outer frame 10 to be a part of the second immovable part, and the other is the mounting part. The vibration-absorbing material 50 is added while being connected to the mounting substrate 41 to be a component of the second movable part, and the magnet assembly 34 and the coil assembly 35 correspond to each other.

  Please refer to FIG. FIG. 7 is a side sectional view of a fourth embodiment of the camera shake preventing structure of the present invention. In this embodiment, the autofocus structure 20 is connected to the lens frame 31 of the anti-shake structure 30, that is, the first movable part and the second movable part are connected to form one movable part. The first immovable part and the second immovable part form one immovable part. Accordingly, the vibration absorbing material 50 is simply added between the magnet assembly 34 and the coil assembly 35 (second movable portion and second non-movable portion), that is, the vibration absorbing material is moved between the movable portion and the non-movable portion. By simply adding between the movable parts, the vibration absorbing material 50 suppresses the resonance that can be generated by the movable part, and the side edges of the magnetic element 25 and the coil 24 (the first movable part and the first non-movable part). The vibration absorbing material added between them can be omitted.

  Therefore, the present invention provides a design different from the well-known ones by the techniques described above, which increases the overall value of use and is not described in publications distributed before the application, or Since it is not publicly used, it will meet the requirements of the patent and it will be up to you to apply for a patent here.

DESCRIPTION OF SYMBOLS 10 Outer frame 11 Top plate 20 Autofocus structure 21 Lens 22 Lens mounting sheet 23 Frame 24 Coil 25 Magnetic element 30 Anti-shake structure 31 Lens frame 32 Correction lens 33 Suspension line 34 Magnet assembly 34x X-axis magnet 34y Y-axis magnet 35 Coil assembly 35x x-axis coil 35y y-axis coil 36 elastic piece 361 outer periphery fixing part 362 outer layer active part 363 inner layer active part 364 first fulcrum 365 second fulcrum 40 image detecting element 41 mounting substrate 50 vibration absorbing material

Claims (16)

In the resonance suppression method of the anti-shake autofocus module,
A lens placement sheet and a frame, the lens placement sheet placing a lens and performing a focusing operation along a light axis direction;
A lens frame and a mounting substrate, a correction lens is disposed on the lens frame to perform an image correction operation, and the lens mounting sheet is connected to the lens frame;
Adding at least one vibration absorbing material between the lens frame and the mounting substrate;
Using the vibration absorbing material, the lens mounting sheet absorbs vibration generated by an autofocus operation, and the lens frame absorbs vibration generated by an image correction operation, and the lens mounting sheet and the lens A step of suppressing resonance generated by the operation of the frame;
A method for suppressing resonance of an anti-shake autofocus module, comprising the above steps.   2. The anti-shake autofocus module resonance suppression method according to claim 1, wherein the vibration absorbing material can be one of a soft gel, a soft spring, a soft rubber, or a vibration absorbing rubber tape. Resonance suppression method for focus module.   2. The anti-shake autofocus module resonance suppression method according to claim 1, wherein the lens is attached to the center of the lens mounting sheet, and four turns are surrounded by a coil. Resonance suppression method for focus module.   2. The method for suppressing resonance of an anti-shake autofocus module according to claim 1, wherein the lens mounting sheet is accommodated in the center of the frame, and a plurality of magnetic elements are fitted on the side edges of the frame. And a method for suppressing resonance of an anti-shake autofocus module, characterized in that it is non-contact with the coil.   2. The resonance suppression method for an anti-shake autofocus module according to claim 1, wherein an image detection element is provided on the mounting substrate. The method of suppressing resonance of an anti-shake autofocus module according to claim 1, wherein the anti-shake structure is at least:
An outer frame connected to the frame, and the outer frame;
At least one flexible component connected between the lens frame and the outer frame and used to suspend the correction lens in the direction of the optical axis;
A magnet assembly comprising at least one x-axis magnet and at least one y-axis magnet;
A coil assembly comprising at least one x-axis coil and at least one y-axis coil, and corresponding to said magnet assembly but non-contacting;
Wherein one of the coil assembly and the magnet assembly is connected to the lens frame, and the other is connected to the mounting substrate, and the vibration absorbing material is added while corresponding to each other. A method for suppressing resonance of an autofocus module for preventing camera shake, comprising:   7. The method of suppressing resonance of an anti-shake autofocus module according to claim 6, wherein the flexible part is a plurality of suspension lines.   7. The resonance suppression method for an anti-shake autofocus module according to claim 6, wherein the flexible component is an elastic piece. In anti-shake autofocus module that suppresses resonance,
An autofocus structure comprising a lens placement sheet and a frame, the lens placement sheet placing a lens and performing a focusing operation along a light axis direction;
An anti-shake structure comprising a lens frame and a mounting substrate, wherein a correction lens is disposed on the lens frame to perform an image correction operation, and the lens mounting sheet is connected to the lens frame;
Applied between the lens frame and the mounting substrate, the lens mounting sheet absorbs vibrations generated by an autofocus operation, and the lens frame absorbs vibrations generated by an image correction operation. At least one vibration-absorbing material that suppresses resonance that may occur due to the operation of the lens mounting sheet and the lens frame;
An autofocus module for preventing camera shake characterized by comprising   The anti-shake autofocus module according to claim 9, wherein the vibration absorbing material can be any one of a soft gel, a soft spring, a soft rubber, or a vibration absorbing rubber tape.   10. The anti-shake autofocus module according to claim 9, wherein the lens is attached to the center of the lens mounting sheet, and four turns are surrounded by a coil.   The anti-shake autofocus module according to claim 9, wherein the lens mounting sheet is accommodated in the center of the frame, and a plurality of magnetic elements are fitted to the side edges of the frame to correspond to the outside of the coil. An autofocus module for preventing camera shake, wherein the autofocus module is non-contact with the coil.   10. The anti-shake autofocus module according to claim 9, wherein an image detecting element is provided on the mounting substrate. The anti-shake autofocus module according to claim 9, wherein the anti-shake structure is at least:
An outer frame connected to the frame, and the outer frame;
At least one flexible component connected between the lens frame and the outer frame and used to suspend the correction lens in the direction of the optical axis;
A magnet assembly comprising at least one x-axis magnet and at least one y-axis magnet;
A coil assembly comprising at least one x-axis coil and at least one y-axis coil, and corresponding to said magnet assembly but non-contacting;
Wherein one of the coil assembly and the magnet assembly is connected to the lens frame, and the other is connected to the mounting substrate, and the vibration absorbing material is added while corresponding to each other. An autofocus module that prevents camera shake.   The anti-shake autofocus module according to claim 14, wherein the flexible part is a plurality of suspension lines.   15. The anti-shake autofocus module according to claim 14, wherein the flexible part is an elastic piece.

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