WO2023026964A1 - 光学素子駆動装置、カメラモジュール及びカメラ搭載装置 - Google Patents

光学素子駆動装置、カメラモジュール及びカメラ搭載装置 Download PDF

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Publication number
WO2023026964A1
WO2023026964A1 PCT/JP2022/031304 JP2022031304W WO2023026964A1 WO 2023026964 A1 WO2023026964 A1 WO 2023026964A1 JP 2022031304 W JP2022031304 W JP 2022031304W WO 2023026964 A1 WO2023026964 A1 WO 2023026964A1
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WO
WIPO (PCT)
Prior art keywords
optical element
driving device
portions
element driving
holding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/031304
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
智彦 大坂
洋平 遠田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsumi Electric Co Ltd
Original Assignee
Mitsumi Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsumi Electric Co Ltd filed Critical Mitsumi Electric Co Ltd
Priority to KR1020247005607A priority Critical patent/KR102930715B1/ko
Priority to CN202280055456.0A priority patent/CN117836688A/zh
Priority to US18/685,526 priority patent/US12613454B2/en
Publication of WO2023026964A1 publication Critical patent/WO2023026964A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/04—Vertical adjustment of lens; Rising fronts
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G03B2205/0023—Movement of one or more optical elements for control of motion blur by tilting or inclining one or more optical elements with respect to the optical axis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils

Definitions

  • the present invention relates to an optical element driving device for driving an optical element, a camera module, and a camera mounting device.
  • a camera module is installed in a camera-equipped device such as a smartphone.
  • An optical element driving device for driving an optical element is used in such a camera module.
  • the optical element driving device has an autofocus function (hereinafter referred to as "AF function", AF: Auto Focus).
  • AF function autofocus function
  • the optical element driving device automatically performs focusing when photographing a subject by driving a lens with an AF function.
  • Patent Document 1 discloses a lens driving device including a lens holder that holds a lens, a ball member that supports the lens holder movably in the optical axis direction of the lens, and an actuator that applies a driving force to the lens holder. It is shown.
  • a lens holder is accommodated inside a base that is substantially rectangular in plan view, and ball members are arranged at two adjacent corners of the base to movably support the lens holder. ing.
  • Patent Document 1 ball members are arranged at two adjacent corners of the base, and the ball members have a structure for supporting the lens holder substantially at one end side of the lens holder. Therefore, with such a support structure, if the size and weight of the lens increase, the lens may tilt (tilt), and it is difficult to stably and movably support the lens.
  • An object of the present invention is to provide an optical element driving device, a camera module, and a camera mounting device that stably and movably support an optical element.
  • An optical element driving device includes: An optical element driving device for driving an optical element, a holding part having an opening surrounding the outer periphery of the optical element and capable of holding the optical element; an accommodating portion that accommodates the holding portion inside; A plurality of abutment portions that abut against the holding portion are provided inside the housing portion at at least three positions distributed in the circumferential direction, and the plurality of abutment portions move the holding portion to the inside of the opening. a supporting portion that supports the holding portion so as to be movable in the optical axis direction of the optical element while pressing in the direction toward the optical element; Prepare.
  • a camera module includes: the optical element driving device; a driving unit that drives the holding unit so as to be movable in the optical axis direction; an imaging unit that captures a subject image formed by the optical element; Prepare.
  • a camera-equipped device includes: A camera-equipped device that is information equipment or transportation equipment, the camera module; an image processing unit that processes image information obtained by the camera module; Prepare.
  • an optical element can be stably and movably supported.
  • FIG. 1 is a front view showing a smart phone equipped with a camera module according to an embodiment of the invention
  • FIG. 1B is a rear view of the smartphone shown in FIG. 1A
  • FIG. It is a perspective view which shows a camera module and an imaging part.
  • FIG. 3 is a plan view of an optical element driving device body included in the optical element driving device of the camera module
  • 4 is a plan view for explaining a modification (modification 1) of the main body of the optical element driving device shown in FIG. 3.
  • FIG. FIG. 5 is a plan view illustrating a modification (modification 2) of the support portion of the main body of the optical element driving device illustrated in FIGS. 3 and 4;
  • FIG. 6 is a perspective view of the support shown in FIG. 5;
  • FIG. 5 is a plan view showing a modification (modification 2) of the support portion of the main body of the optical element driving device illustrated in FIGS. 3 and 4
  • FIG. 6 is a perspective view of the support shown in FIG. 5;
  • FIG. 5
  • FIG. 6 is an exploded perspective view of the support shown in FIG. 5;
  • FIG. 5 is a plan view illustrating a modification (modification 3) of the support portion of the main body of the optical element driving device illustrated in FIGS. 3 and 4;
  • FIG. 9 is a perspective view of the support shown in FIG. 8;
  • FIG. 10 is a perspective view of a second rail member of the support shown in FIG. 9;
  • FIG. 4 is a plan view of the main body of the optical element driving device having two driving units;
  • 1 is a front view showing an automobile as a camera-equipped device on which an in-vehicle camera module is installed;
  • FIG. 12B is a perspective view of the automobile shown in FIG. 12A as viewed obliquely from the rear;
  • FIG. 1A and 1B are diagrams showing a smartphone M (an example of a camera-equipped device) equipped with a camera module A according to the present embodiment.
  • 1A is a front view of the smartphone M
  • FIG. 1B is a rear view of the smartphone M.
  • FIG. 1A is a front view of the smartphone M
  • FIG. 1B is a rear view of the smartphone M.
  • Smartphone M has a dual camera consisting of two rear cameras OC1 and OC2.
  • the camera module A is applied to the rear cameras OC1 and OC2.
  • Camera module A has an AF function and can automatically focus when shooting a subject.
  • the camera module A may have a shake correction function (OIS: Optical Image Stabilization, hereinafter referred to as "OIS function").
  • OIS function Optical Image Stabilization
  • With the OIS function it is possible to optically correct shake (vibration) that occurs at the time of shooting, and to shoot an image without image blur.
  • FIG. 2 is a perspective view showing the camera module A and the imaging section 5.
  • FIG. 3 is a plan view of an optical element driving device main body 4A included in the optical element driving device 1 of the camera module A shown in FIG.
  • this embodiment will be described using an orthogonal coordinate system (X, Y, Z).
  • the camera module A when photographing is performed by the smartphone M, the camera module A is mounted so that the X direction is the up-down direction (or the left-right direction), the Y direction is the left-right direction (or the up-down direction), and the Z direction is the front-back direction. . That is, the Z direction is the direction of the optical axis, and in FIG. 2, the upper side (+Z side) is the light receiving side in the optical axis direction, and the lower side ( ⁇ Z side) is the imaging side in the optical axis direction.
  • optical axis orthogonal direction the X direction and the Y direction orthogonal to the Z axis
  • XY plane the XY plane
  • optical axis orthogonal plane the direction orthogonal to the optical axis
  • the camera module A has an optical element driving device 1 that realizes an AF function, a lens unit 2 in which a lens is housed in a cylindrical lens barrel, and an image formed by the lens unit 2.
  • An imaging unit 5 for capturing an image of a subject is provided. That is, the optical element driving device 1 is a so-called lens driving device that drives the lens portion 2 as an optical element.
  • the optical element driving device main body 4A is covered with a cover 3 on the outside.
  • the cover 3 is a lidded quadrangular cylinder having a rectangular shape in a plan view seen from the optical axis direction. In this embodiment, the cover 3 has a square shape in plan view.
  • the cover 3 has a substantially circular opening 301 on its upper surface.
  • the lens part 2 is accommodated in the opening 11 of the holding part 10 of the optical element driving device main body 4A, faces the outside from the opening 301 of the cover 3, and is moved in the direction of the optical axis, for example, from the opening surface of the cover 3. It is configured to protrude toward the light receiving side in the optical axis direction.
  • the inner wall of the cover 3 is fixed to the side surface of the accommodating portion 20 of the optical element driving device main body 4A by, for example, adhesion, and accommodates the optical element driving device main body 4A.
  • the cover 3 has a member that blocks electromagnetic waves from the outside of the optical element driving device 1, for example, a shield member made of a magnetic material.
  • the imaging unit 5 is arranged on the imaging side of the optical element driving device 1 in the optical axis direction.
  • the imaging unit 5 has, for example, an image sensor substrate 501 , an imaging device 502 mounted on the image sensor substrate 501 , and a control unit 503 .
  • the imaging device 502 is configured by, for example, a CCD (charge-coupled device) image sensor, a CMOS (complementary metal oxide semiconductor) image sensor, or the like, and captures an object image formed by the lens unit 2 .
  • CCD charge-coupled device
  • CMOS complementary metal oxide semiconductor
  • the control unit 503 is composed of, for example, a control IC, and controls driving of the optical element driving device 1 .
  • the optical element driving device 1 is mounted on the image sensor substrate 501 and mechanically and electrically connected.
  • the control unit 503 may be provided on the image sensor substrate 501, or may be provided on a camera-equipped device (in this embodiment, the smart phone M) on which the camera module A is mounted.
  • the optical element driving device main body 4A is an optical element driving device that drives the lens portion 2, which is an optical element. As shown in FIG. 3, the optical element driving device main body 4A includes a holding portion 10 having an opening 11 surrounding the outer periphery of the lens portion 2 and capable of holding the lens portion 2, and an accommodating opening 21 inside the holding portion 10. and an accommodating portion 20 to be accommodated in.
  • the holding part 10 has a cylindrical opening 11 in the center corresponding to the cylindrical lens part 2 .
  • the inner peripheral surface of the opening 11 is configured to be able to hold the lens portion 2 within the opening 11 by forming, for example, a mounting groove or the like.
  • An outer peripheral surface 12, which is the outside of the holding portion 10, is formed in a cylindrical shape.
  • the outer peripheral surface 12 has first grooves 13 extending along the optical axis direction of the optical axis OA at a plurality of locations (three locations as an example in FIG. 3).
  • the housing portion 20 has a cylindrical housing opening 21 in the center corresponding to the cylindrical holding portion 10 .
  • An inner peripheral surface 22 inside the accommodation opening 21 has a second groove 23 extending along the optical axis direction, facing the first groove 13 .
  • the outer shape of the housing portion 20 is formed in a rectangular shape in plan view.
  • a ball member 31 is press-fitted between the first groove portion 13 and the second groove portion 23 facing each other.
  • the first groove portion 13, the second groove portion 23, and the ball members 31 constitute the support portion 40A, and the support portions 40A are provided in plurality corresponding to the plurality of ball members 31, respectively.
  • the holding portion 10 is supported by the support portion 40A so as to be movable in the optical axis direction with respect to the housing portion 20 .
  • the support portions 40A are arranged at positions dispersed in at least three positions (in FIG. 3, three positions as an example) in the circumferential direction inside the housing portion 20, that is, on the inner peripheral surface 22 of the housing opening portion 21. there is
  • the angles between the support parts 40A are arranged at intervals of 120°, but this angle can be changed as appropriate.
  • the support portions 40A may be disposed at three or more locations on the inner peripheral surface 22, for example, at four or five locations. It is desirable to place them at multiples of 3, such as 6 or 9, so as to provide additional support between the three points of support.
  • the ball member 31 is configured to be pressed toward the first groove portion 13 of the holding portion 10 by the second groove portion 23 of the housing portion 20. That is, the ball member 31 is configured to contact the first groove portion 13 of the holding portion 10 and press the opening portion 11 inward.
  • the ball member 31 corresponds to the contact portion in the present invention.
  • the ball member 31 is configured to apply pressing forces F1 to F3 toward the inside of the opening 11 to the first groove portion 13 .
  • each of the pressing forces F1 to F3 is applied to a point located inside the opening 11 when viewed from the optical axis direction. (the position of the optical axis OA) (see the dashed line in FIG. 3).
  • a driving portion 51 is attached to the inner peripheral surface 22 of the housing opening portion 21 to drive the holding portion 10 in the optical axis direction.
  • the optical element driving device main body 4A can drive the lens section 2 together with the holding section 10 in the optical axis direction by the supporting section 40A and the driving section 51, thereby realizing the AF function.
  • the drive portion 51 is arranged at a location different from the location where the support portion 40A is arranged on the inner peripheral surface 22 of the housing opening 21 .
  • one drive unit 51 is arranged at a position opposed to one support portion 40A out of the three support portions 40A across the optical axis OA.
  • the drive portions 51 may be arranged at a plurality of locations, and in that case, they are arranged separately in the circumferential direction on the inner peripheral surface 22, similar to the support portion 40A.
  • the drive units 51 are arranged at two locations, they are arranged at locations different from the location where the support portion 40A is arranged and opposite to each other with the optical axis OA interposed therebetween.
  • the supporting portion 40A and the driving portion 51 may be arranged in the same manner as the optical element driving device main body 4C shown in FIG. 11 which will be described later.
  • one support portion 40A is arranged at a portion corresponding to one corner portion 20a (first corner portion in the present invention) among the four corner portions 20a to 20d of the housing portion 20, and the other The support portion 40A is arranged in a portion avoiding the four corners 20a to 20d.
  • a pair of drive portions 51 are arranged to face each other at portions corresponding to the corner portions 20b and 20d (second and third corner portions in the present invention) located on both sides of the corner portion 20a.
  • a driving source such as a voice coil motor (VCM: Voice Coil Motor) or an ultrasonic motor can be used.
  • VCM voice Coil Motor
  • ultrasonic motor for example, a driving source such as a voice coil motor (VCM: Voice Coil Motor) or an ultrasonic motor.
  • the housing portion 20 is arranged on the holding portion 10 via the support portions 40A.
  • the ball member 31 of the support portion 40A is configured to contact the first groove portion 13 and press the opening portion 11 inward. Therefore, while pressing the holding portion 10 toward the inside of the opening 11, the holding portion 10 is supported so as to be movable in the optical axis direction, and tilting of the lens portion 2 can be suppressed. can.
  • the housing portion 20 can stably support the holding portion 10 via the support portion 40A, and the lens portion 2 can be stably moved even if the size and weight of the lens portion 2 increase. can support
  • the support portion 40A is configured to use the ball member 31, but instead of the ball member 31, a roller member may be used.
  • the shape and the like of the first groove portion 13 and the second groove portion 23 may be changed according to the shape and arrangement of the roller member.
  • a shaft member extending in the optical axis direction a protrusion projecting outward from the outer peripheral surface 12 of the holding portion 10, or an inner peripheral surface 22 of the accommodating opening 21 of the accommodating portion 20 may be used. It may be a projecting portion that protrudes.
  • the shapes of the first groove portion 13 and the second groove portion 23 may be changed so that the shaft member and the protrusion are slidably supported in the optical axis direction.
  • FIG. 4 is a plan view for explaining an optical element driving device main body 4B that is a modification of the optical element driving device main body 4A shown in FIG.
  • the optical element driving device main body 4B of this modified example shown in FIG. 4 has the same components as the optical element driving device main body 4A shown in FIG.
  • the same reference numerals are given, and overlapping descriptions are omitted.
  • the accommodating portion 20 is made of a resin material that can be elastically deformed by adjusting the thickness and the like.
  • a hollow portion 24 is formed on the outer peripheral side of the second groove portion 23 in order to apply an appropriate biasing force to the second groove portion 23 of the support portion 40A.
  • the second groove portion 23 is provided with the The urging force can be adjusted.
  • the portion between the second groove portion 23 and the hollow portion 24 corresponds to the elastic member in the present invention. Due to contact with the ball member 31 press-fitted between the first groove portion 13 and the second groove portion 23, the portion between the second groove portion 23 and the hollow portion 24 is elastically deformed. A portion between the second groove portion 23 and the hollow portion 24 applies a restoring force generated by the elastic deformation to the second groove portion 23 and the ball member 31 as an urging force. As a result, an appropriate biasing force can be applied to the second groove portion 23, and appropriate pressing forces F1 to F3 can be applied to the first groove portion 13 of the holding portion 10 via the ball member 31.
  • the hollow portions 24 are arranged for all the support portions 40A, but the hollow portion 24 may be arranged for at least one support portion 40A.
  • the urging force applied to the second groove portion 23 in one support portion 40A the action and reaction of the force via the holding portion 10 cause the second groove portion 23 to be applied to the other support portion 40A as well.
  • the applied biasing force can be adjusted.
  • the hollow portion 24 may be formed by a through hole passing through the housing portion 20 in the optical axis direction, or may be formed by a bottomed concave portion recessed in the housing portion 20 in the optical axis direction.
  • the hollow portion 24 is formed for applying an appropriate biasing force to the support portion 40A (second groove portion 23). 13) can be applied with appropriate pressing forces F1 to F3. Therefore, while pressing and urging the holding portion 10 toward the inner side of the opening portion 11, the holding portion 10 is supported so as to be movable in the optical axis direction, thereby suppressing the tilt of the lens portion 2. can do. As a result, the housing portion 20 can stably support the holding portion 10 via the support portion 40A, and the lens portion 2 can be stably moved even if the size and weight of the lens portion 2 increase. can support
  • FIG. 5 is a plan view illustrating a support portion 40B, which is a modification of the support portion 40A of the optical element driving device main body 4A shown in FIG. 3 and the optical element driving device main body 4B shown in FIG. 6 is a perspective view of the support portion 40B, and FIG. 7 is an exploded perspective view of the support portion 40B.
  • each member constituting the support portion 40B is illustrated with different viewing angles.
  • a supporting portion 40B which will be described later, is used instead of the supporting portion 40A in the optical element driving device main body 4A shown in FIG. 3 and the optical element driving device main body 4B shown in FIG. Therefore, the same components as those of the optical element driving device main body 4A and the optical element driving device main body 4B are denoted by the same reference numerals, and overlapping descriptions are omitted.
  • the ball member 31 is generally made of a material such as ceramics or an alloy. , a strength that can withstand the pressing forces F1 to F3.
  • the first rail member 15 (the first groove in the present invention) is attached to the outer peripheral surface 12 outside the holding portion 10, and the second rail member 15 is attached to the inner peripheral surface 22 inside the accommodating portion 20.
  • a member 25 (second groove in the present invention) is attached.
  • the first rail member 15 and the second rail member 25 are generally made of a material, such as a metal material, that is harder than the holding portion 10 and the housing portion 20 made of resin or the like.
  • the first rail member 15 has a clamping surface 15a that rotatably clamps the ball member 31 when it moves in the optical axis direction together with the holding part 10, and claws 15b and 15c attached to the outer peripheral surface 12.
  • the sandwiching surface 15a is a curved surface extending in the optical axis direction, and is curved such that its central portion is recessed inside the opening 11 in plan view.
  • the claw portions 15b extend toward the light-receiving side (+Z side) in the optical axis direction and are arranged at two locations across the holding surface 15a. Further, the claw portion 15c extends toward the inside of the opening portion 11 and is arranged at two locations sandwiching the holding surface 15a and the claw portion 15b.
  • the holding portion 10 is formed with an insertion groove into which the claw portion 15b is inserted, and an insertion groove into which the claw portion 15c is inserted.
  • the first rail member 15 is attached to the outer peripheral surface 12 of the holding portion 10 by inserting the claw portions 15b and 15c into these insertion grooves and fixing them.
  • the second rail member 25 has a clamping surface 25a that clamps the ball member 31 rotatably.
  • the holding surface 25a is a curved surface extending in the optical axis direction, and is curved such that its central portion is recessed outward with respect to the outer peripheral surface 12 in plan view.
  • the second rail member 25 is arranged inside the above-described second groove portion 23 and fixed inside the second groove portion 23 by, for example, a bonding method such as an adhesive.
  • the first rail member 15 and the second rail member 25 are arranged facing each other so as to sandwich the ball member 31 therebetween.
  • two ball members 31 are sandwiched between the first rail member 15 and the second rail member 25 .
  • the two ball members 31 are held by a retainer 32 so as to maintain a constant distance from each other and to enable positioning in the optical axis direction.
  • the ball member 31 clamped therebetween rotates more smoothly. You may do so. This allows the first rail member 15 to move more smoothly in the optical axis direction, that is, the holding section 10 to move more smoothly in the optical axis direction.
  • the first rail member 15 and the second rail member 25 made of a material harder than the holding portion 10 and the housing portion 20 are provided.
  • a ball member 31 is sandwiched between two rail members 25 .
  • the holding portion 10 and the accommodation portion by the ball member 31 are different. Deformation of the portion 20 can be suppressed. Further, even if the pressing forces F1 to F3 are increased, the first rail member 15 and the second rail member 25 are not easily deformed, and the strong pressing forces F1 to F3 can be applied to the holding section 10 side. tilt can be suppressed more strongly.
  • the housing portion 20 can stably support the holding portion 10 via the support portion 40B, and the lens portion 2 can be stably moved even if the size and weight of the lens portion 2 are increased. can support
  • FIG. 8 is a plan view illustrating a support portion 40C, which is a modification of the support portion 40A of the optical element driving device main body 4A shown in FIG. 3 and the optical element driving device main body 4B shown in FIG. 9 is a perspective view of the support portion 40C, and FIG. 10 is a perspective view of the second rail member of the support portion 40C.
  • This modified example also uses a support portion 40C, which will be described later, instead of the support portion 40A and the support portion 40B shown in FIG. 5 in the optical element driving device main body 4A shown in FIG. and Therefore, the same components as those of the optical element driving device main body 4A, the optical element driving device main body 4B, and the supporting portion 40B are denoted by the same reference numerals, and overlapping descriptions are omitted.
  • a second rail member 27 capable of elastic deformation (an elastic member according to the present invention) is used instead of the second rail member 25 of the support portion 40B shown in FIG. 5, a second rail member 27 capable of elastic deformation (an elastic member according to the present invention) is used.
  • the second rail member 27 is also attached to the inner peripheral surface 22 of the housing portion 20 and is made of a material harder than the holding portion 10 and the housing portion 20, such as a metal material.
  • the first rail member 15, the ball member 31, and the retainer 32 are the same as those described in the second modification.
  • the second rail member 27 includes a fixing portion 27d (a first fixing portion and a second fixing portion in the present invention) fixed to the inner wall surface 26 formed on the inner peripheral surface 22 of the housing portion 20, and a biasing force. and an application portion 27 b that contacts the ball member 31 .
  • the inner side (first rail member 15 side) of the applying portion 27b serves as a clamping surface 27a that clamps the ball member 31 rotatably.
  • the sandwiching surface 27a is a curved surface extending in the optical axis direction, and is curved such that its central portion is recessed outward with respect to the outer peripheral surface 12 in plan view.
  • the imparting portion 27b is connected to deforming portions 27c arranged at two locations so as to sandwich the imparting portion 27b.
  • the deforming portion 27c is formed in a meandering shape, and the deforming portions 27c arranged at two locations are arranged so as to be symmetrical with respect to the applying portion 27b.
  • the deformation portion 27c formed in this manner is elastically deformable, and transmits the restoring force generated by the elastic deformation to the applying portion 27b as an urging force.
  • the deformable portion 27c is configured to pull the two fixed portions 27d in a direction to bring them closer together (see black arrows in FIG. 8).
  • the fixing part 27d is arranged at two locations sandwiching the applying part 27b and the deforming part 27c, and is connected to the deforming part 27c.
  • the fixing portions 27 d arranged at two locations extend in opposite directions in the circumferential direction surrounding the holding portion 10 and are fixed to the inner wall surface 26 respectively.
  • the fixing portion 27 d has a fixing hole 27 e , and is fixed to the inner wall surface 26 by locking the fixing hole 27 e with a locking portion (not shown) formed on the inner wall surface 26 .
  • the two fixing portions 27d When fixing the fixing portion 27d to the inner wall surface 26, the two fixing portions 27d are pulled (extended) outward and the fixing hole 27e is pushed inward so that a force acts in a direction to bring the two fixing portions 27d closer to each other.
  • the fixed portion 27 d is fixed to the inner wall surface 26 by being locked to the locking portion of the wall surface 26 . In this way, the two fixing portions 27d pull the two fixing surfaces 26a and 26b of the inner wall surface 26 toward each other, so that the other supporting portion 40C is pulled through the accommodating portion 20 (in the entire accommodating portion 20). It becomes possible to energize.
  • the second rail member 27 of the support portion 40C allows the second rail member 27 of the support portion 40C to move through the storage portion 20 (the entire storage portion 20). ), it becomes possible to bias the support portion 40B.
  • the inner wall surface 26 is formed on the inner peripheral surface 22 so as to correspond to the shape of the second rail member 27 .
  • two fixing surfaces 26a and 26b of the inner wall surface 26 to which the two fixing portions 27d are fixed are formed so as to be perpendicular to each other.
  • FIG. 11 shows an example of a combination of two support portions 40B and one support portion 40C and having two drive portions 51.
  • FIG. FIG. 11 is a plan view of an optical element driving device main body 4C having two driving units 51.
  • the optical element driving device main body 4C has two supporting portions 40B, one supporting portion 40C, and two driving portions 51, as described above.
  • a supporting portion 40B, a supporting portion 40C, and a driving portion 51 may be arranged.
  • one support portion 40C having the second rail member 27 corresponds to one corner portion 20a (first corner portion in the present invention) of the four corner portions 20a to 20d of the housing portion 20. Place in part.
  • the other two support portions 40B are arranged in portions avoiding the four corner portions 20a to 20d.
  • the pair of driving portions 51 are arranged at portions corresponding to the corner portions 20b and 20d (second and third corner portions in the present invention) located on both sides of the corner portion 20a, with the optical axis OA interposed therebetween, arranged to face each other.
  • the one support portion 40C is the portion that applies the biasing force, and the portion that receives the biasing force of the two support portions 40B.
  • the position of the support portion 40B on the inner peripheral surface 22 of the accommodation opening 21 is set and arranged as follows.
  • the direction of the pressing force F1 of the ball member 31 due to the biasing force of the second rail member 27, for example, an extension line extending the direction of the pressing force F1 (a chain double-dashed line in the figure) is shown.
  • the positions of the two support portions 40B are set and arranged so as to be symmetrical with respect to the assumed extension line. By arranging the two support portions 40B at such positions, the biasing force that the two support portions 40B receive from the one support portion 40C becomes equal, and the holding portion 10 can be stably supported.
  • the ideal interval between the two support portions 40B and one support portion 40C is 120°, but the interval is not necessarily 120°. line), the position of the support portion 40B may be set and arranged. Also, the pair of drive portions 51 are arranged to face each other at portions corresponding to the corner portions 20b and 20d so as to be line symmetrical with respect to the direction (extension line) of the pressing force F1.
  • the first rail member 15 and the second rail member 27 made of a material harder than the holding portion 10 and the housing portion 20 are provided.
  • a ball member 31 is sandwiched between two rail members 27 . Therefore, as described in Modification 2, deformation of the holding portion 10 and the housing portion 20 by the ball member 31 can be suppressed, and strong pressing forces F1 to F3 can be applied to the holding portion 10 side. Inclination (tilt) of the lens portion 2 can be suppressed more strongly.
  • the support portion 40C is provided with the second rail member 27, which is an elastic member for applying an appropriate biasing force, appropriate pressing forces F1 to F3 are applied to the holding portion 10 via the ball member 31. can do. Therefore, tilting of the lens portion 2 can be suppressed.
  • the housing portion 20 can stably support the holding portion 10 via the support portion 40C, and the lens portion 2 can be stably moved even if the size and weight of the lens portion 2 increase. can support
  • the smartphone M was described as an example, but the present invention is applied to a camera-equipped device having a camera module and an image processing unit that processes image information obtained by the camera module.
  • Camera-equipped devices include information equipment and transportation equipment.
  • Information devices include, for example, camera-equipped mobile phones, laptop computers, tablet terminals, portable game machines, web cameras, and camera-equipped in-vehicle devices (eg, back monitor devices, drive recorder devices).
  • Transportation equipment also includes, for example, automobiles.
  • FIGS. 12A and 12B are diagrams showing an automobile V as a camera-equipped device equipped with an in-vehicle camera module VC (Vehicle Camera).
  • 12A is a front view of automobile V
  • FIG. 12B is a rear perspective view of automobile V.
  • FIG. An automobile V is equipped with the camera module A described in the above embodiments and modifications as an in-vehicle camera module VC.
  • the in-vehicle camera module VC is attached to the windshield facing forward, or attached to the rear gate facing rearward, for example.
  • This in-vehicle camera module VC is used for a back monitor, drive recorder, collision avoidance control, automatic driving control, and the like.
  • the optical element driving device 1 that drives the lens unit 2 as an optical element has been described.
  • the lens portion 2 and the holding portion 10 are formed in a cylindrical shape.
  • the shape can be changed as appropriate.
  • the shapes of the opening 11 and the housing opening 21 are also changed according to the shapes of the lens portion 2 and the holding portion 10 .
  • the housing portion 20 has a rectangular outer shape in plan view, the housing portion 20 can also have an outer shape that can be changed as appropriate.
  • the optical element driving device 1 has the AF function. It's okay.
  • optical element driving device and the camera module according to the present invention are useful when mounted on camera-equipped devices such as smartphones, mobile phones, digital cameras, laptop computers, tablet terminals, portable game machines, and in-vehicle cameras. is.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Lens Barrels (AREA)
  • Studio Devices (AREA)
PCT/JP2022/031304 2021-08-26 2022-08-19 光学素子駆動装置、カメラモジュール及びカメラ搭載装置 Ceased WO2023026964A1 (ja)

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KR1020247005607A KR102930715B1 (ko) 2021-08-26 2022-08-19 광학 소자 구동 장치, 카메라 모듈 및 카메라 탑재 장치
CN202280055456.0A CN117836688A (zh) 2021-08-26 2022-08-19 光学元件驱动装置、摄像机模块及摄像机搭载装置
US18/685,526 US12613454B2 (en) 2021-08-26 2022-08-19 Optical element driving device, camera module, and camera-mounted device

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JP2021-138402 2021-08-26
JP2021138402A JP7564450B2 (ja) 2021-08-26 2021-08-26 光学素子駆動装置、カメラモジュール及びカメラ搭載装置

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JP7564450B2 (ja) 2024-10-09
KR102930715B1 (ko) 2026-02-24
US20240393664A1 (en) 2024-11-28
US12613454B2 (en) 2026-04-28
CN117836688A (zh) 2024-04-05
KR20240055735A (ko) 2024-04-29

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