CN111752066B - Optical unit with shake correction function - Google Patents

Optical unit with shake correction function Download PDF

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Publication number
CN111752066B
CN111752066B CN202010217846.6A CN202010217846A CN111752066B CN 111752066 B CN111752066 B CN 111752066B CN 202010217846 A CN202010217846 A CN 202010217846A CN 111752066 B CN111752066 B CN 111752066B
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CN
China
Prior art keywords
cover
housing
movable body
optical axis
optical
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.)
Active
Application number
CN202010217846.6A
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Chinese (zh)
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CN111752066A (en
Inventor
南泽伸司
须江猛
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Nidec Sankyo Corp
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Nidec Sankyo Corp
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
Priority claimed from JP2019062236A external-priority patent/JP7237685B2/en
Priority claimed from JP2019062237A external-priority patent/JP7235558B2/en
Priority claimed from JP2019062239A external-priority patent/JP7237686B2/en
Priority claimed from JP2019062238A external-priority patent/JP7290444B2/en
Priority claimed from JP2019219453A external-priority patent/JP7344780B2/en
Application filed by Nidec Sankyo Corp filed Critical Nidec Sankyo Corp
Publication of CN111752066A publication Critical patent/CN111752066A/en
Application granted granted Critical
Publication of CN111752066B publication Critical patent/CN111752066B/en
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    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • 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
    • H04N23/60—Control of cameras or camera modules
    • H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
    • H04N23/682—Vibration or motion blur correction
    • H04N23/685—Vibration or motion blur correction performed by mechanical compensation
    • H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position

Abstract

An optical unit with a shake correction function is provided in which the impact resistance of the optical unit with a shake correction function is improved. The optical unit with shake correction function includes a movable body and a fixed body, and the movable body includes an optical module and a holder. The optical module includes a protruding portion protruding from an end portion of the housing on the substrate side toward the outer peripheral side. The optical module is positioned in the optical axis direction by the protruding portion abutting against a bottom surface of a first recess provided on the inner peripheral edge of the holder. The fixing body is provided with: a housing having a protruding portion protruding toward an inner peripheral side formed at an end portion in a-Z direction; and a second cover fixed to the housing from an image side in an optical axis direction, which is a-Z direction, and closing an opening provided on an inner peripheral side of the protruding portion. The protruding portion includes a stopper portion that overlaps the movable body when viewed from the optical axis direction, and a region including at least the stopper portion is bonded to the second cover.

Description

Optical unit with shake correction function
Technical Field
The present invention relates to an optical unit with a shake correction function for correcting shake of an optical module.
Background
An optical unit mounted on a mobile terminal or a mobile body is provided with a mechanism for correcting a shake by swinging or rotating a movable body on which an optical module is mounted, in order to suppress disturbance of a captured image when the mobile terminal or the mobile body is moving. Patent document 1 discloses an optical unit with a shake correction function of this type. Patent document 1 includes: a movable body including a lens as an optical element, a lens holder, and a holder holding the lens holder; a fixed body; a gimbal mechanism that swingably supports the movable body with respect to the fixed body; and a correction drive mechanism for swinging the movable body. The drive mechanism for shake correction is a magnetic drive mechanism including a magnet and a coil.
The fixed body includes a housing for accommodating the movable body, and a stopper portion for restricting the movable body from flying out of the housing is provided at a bottom portion of the housing. In patent document 1, a rectangular frame-shaped stopper member is fixed to a bottom portion of a square tubular first housing surrounding an outer peripheral side of a movable body.
[ Prior art documents ]
[ patent document ]
[ patent document 1] Japanese patent laid-open No. 2019-70865
Disclosure of Invention
[ problems to be solved by the invention ]
In the optical unit with the shake correction function, a case in which the movable body is accommodated is configured to integrally hold the parts of the gimbal mechanism and the parts of the magnetic drive mechanism for the purpose of downsizing and reducing the number of parts. Such a housing uses a resin component that can be formed into a complicated shape. When the stopper is formed at the bottom of the resin case, the stopper may be damaged due to low rigidity of the stopper.
For example, an opening may be provided in the bottom of the resin case, and the stopper may protrude from the side surface of the case toward the inner peripheral side when the optical module is inserted into the case from the bottom of the case. Therefore, when the movable body collides with the tip of the stopper, the stopper is easily bent, and the impact resistance is low.
In view of the above, an object of the present invention is to improve the impact resistance of an optical unit with a shake correction function.
[ means for solving problems ]
In order to solve the above-described problems, the present invention provides an optical unit with a shake correction function, comprising: a movable body; a swing support mechanism that supports the movable body swingably about a first axis that intersects an optical axis, and supports the movable body swingably about a second axis that intersects the optical axis and the first axis; a fixed body that supports the movable body via the swing support mechanism; a shake correction drive mechanism that swings the movable body about the first axis and about the second axis, the fixed body including: a housing including an outer frame portion surrounding an outer peripheral side of the movable body and an extension portion extending inward from an end portion on an image side of the outer frame portion in the optical axis direction; and a cover that is fixed to the housing from an image side in the optical axis direction and closes an opening portion provided on an inner peripheral side of the protruding portion, the protruding portion including a stopper portion that overlaps the movable body when viewed in the optical axis direction, a region of the protruding portion including at least the stopper portion being bonded to the cover.
According to the present invention, the fixed body includes a housing accommodating the movable body and a cover fixed to a bottom portion (an end portion on the image side in the optical axis direction) of the housing. The bottom of the housing is provided with a projecting portion projecting toward the inner peripheral side, the projecting portion includes a stopper portion capable of restricting the movable body from flying out of the housing, and a region including at least the stopper portion is bonded to the cover. Thus, the stopper can be reinforced by bonding the cover to the stopper. Therefore, the risk of damage to the protruding portion due to impact at the time of dropping can be reduced, and the impact resistance of the optical unit with shake correction function can be improved.
In the present invention, it is desirable that the entire area of the protruding portion is bonded to the cover. In this way, the extension portion as a whole can be reinforced. Therefore, the impact resistance of the optical unit with the shake correction function can be further improved.
In the present invention, it is preferable that the cover has a thickness in the optical axis direction smaller than a thickness of the protruding portion in the optical axis direction. When the cover is made of a material different from that of the housing and made of a material having high rigidity, the reinforcing effect can be improved even if the cover is thinned. Therefore, an increase in the size in the optical axis direction can be suppressed as compared with the case of reinforcing by increasing the thickness of the protruding portion. Therefore, the optical unit with the shake correction function can be advantageously thinned.
In the present invention, it is preferable that the case is a resin component and the cover is a metal component. By forming the housing as a resin component, a complicated shape can be integrally formed. Therefore, the number of parts can be reduced. In addition, even if the thickness of the cover is reduced, the reinforcing effect is high. Therefore, as compared with the case where the rigidity is increased by increasing the thickness of the extension portion, the increase in the dimension of the fixed body in the optical axis L direction can be suppressed. Therefore, the optical unit with the shake correction function can be advantageously thinned.
In this case, the following structure may be adopted: the swing support mechanism includes a gimbal frame connecting the movable body and the fixed body, a second fulcrum portion in point contact with the gimbal frame is provided at a diagonal position in the second axial direction of the housing, and the drive mechanism for shake correction includes a coil disposed in a coil disposition hole provided in the housing and a magnet fixed to the movable body. A complicated shape can be formed integrally with the resin case. Therefore, the fulcrum portion and the coil arrangement hole of the gimbal mechanism can be integrally formed, and therefore the number of parts can be reduced. At the same time, the man-hours for assembling can be reduced.
In the present invention, it is preferable that the movable body includes an optical module and a holder surrounding an outer peripheral side of the optical module, a protruding portion protruding to an outer peripheral side is provided on the optical module, the holder includes a stopper portion against which the protruding portion abuts from an image side in the optical axis direction, the housing includes a notch portion formed by cutting an inner peripheral edge of the protruding portion to the outer peripheral side, and the protruding portion and the stopper portion are located inside the notch portion when viewed from the optical axis direction. In this way, since the protruding portion serves as a positioning reference in the optical axis direction of the optical module, the positioning reference can be arranged at a position different from the top surface of the optical module. Therefore, the positioning reference of the optical module can be brought close to the rotation center of the movable body, and the deviation of the center of gravity position of the movable body can be reduced. In addition, although the optical module is provided with the protruding portion as a positioning reference, when the optical module is assembled from the bottom surface side of the housing to the holder, interference between the positioning reference (protruding portion) and the protruding portion can be avoided. Therefore, the optical unit with shake correction function can be assembled in a step of inserting the optical module from the bottom surface side of the case and fixing the optical module to the holder after the swing support mechanism and the shake correction drive mechanism are assembled between the case and the holder.
In the present invention, it is preferable that a recessed portion recessed toward the subject side in the optical axis direction is provided on an inner peripheral edge of the holder, the recessed portion is located inside the notch portion when viewed in the optical axis direction, the stopper portion is a bottom surface of the recessed portion, and the recessed portion is an adhesive pool in which an adhesive for fixing the optical module to the holder is disposed. In this way, the notch portion for avoiding interference between the protruding portion and the protruding portion can be used as a window portion for passing the syringe for applying the adhesive. Therefore, the adhesive can be applied to the recess from the outside of the case. Further, since the stopper portion and the adhesive pool can be arranged at the same position, the complexity of the shape of the component can be avoided.
In the present invention, it is preferable that the housing includes a housing end surface facing the cover in the optical axis direction and a projection projecting from the housing end surface, and the cover is fixed to the housing by an adhesive layer formed between the housing end surface and the cover. In the case where the portion where the case and the cover are bonded is configured to bond the flat surfaces to each other, if any one of the components is warped, the gap between the flat surfaces becomes too large, and a portion where the adhesive layer cannot be formed is formed. As a result, there is a problem that the adhesion area cannot be secured and the rigidity cannot be secured. In the present invention, by forming the convex portion on the end face of the case in advance, it is possible to suppress the gap from becoming excessively large even when any one of the case and the cover is warped. Therefore, there is little risk that the bonding area cannot be secured, and thus there is little risk that the rigidity cannot be secured. Therefore, the impact resistance of the optical unit with the shake correction function can be improved.
In the present invention, it is desirable that the projection extends to an edge of the end face of the housing. Thus, the structure of the mold for forming the convex portion on the end face of the case can be simplified.
In the present invention, it is preferable that the cover includes a bottom cover fixed to the end surface of the housing, and a seal cover closing an inner opening formed in the bottom cover, the inner opening being disposed on an inner peripheral side of the opening when viewed from the optical axis direction, the bottom cover including an adhesive leakage preventing wall rising from an edge of the inner opening toward the housing. Thus, when the adhesive applied between the case and the cover overflows from the edge of the opening of the case, leakage of the adhesive can be restricted. Therefore, even if a large amount of adhesive is applied to secure the bonding area, leakage of the adhesive can be suppressed.
In the present invention, it is desirable that the housing includes: the first frame portion and the second frame portion facing each other in a first direction orthogonal to the optical axis through the movable body, and the third frame portion and the fourth frame portion facing each other in a second direction orthogonal to the first direction and orthogonal to the optical axis through the movable body, wherein the third frame portion includes a cutout portion through which a flexible printed circuit board connected to the movable body passes, and the convex portion is provided at least at one portion in each of the first frame portion, the second frame portion, and the fourth frame portion. In this way, since the convex portions are disposed on all three sides surrounding the opening of the case, it is possible to reduce the risk that the gap between the case end face and the second cover becomes too large in all three sides and the adhesive layer cannot be formed. Therefore, there is little risk that the bonding area cannot be secured, and thus there is little risk that the rigidity cannot be secured.
In the present invention, it is preferable that the housing includes a through portion that penetrates through a diagonal position in the second axial direction in the optical axis direction, and the housing end surface includes a concave portion located between the through portion and the convex portion. In this way, even if the adhesive is excessively applied between the through portion and the protruding portion, the adhesive can be contained in the recessed portion. Therefore, the leakage of the adhesive from the through portion can be suppressed.
[ Effect of the invention ]
According to the present invention, the fixed body includes a housing that houses the movable body, and a cover that is fixed to a bottom portion (an end portion on the image side in the optical axis direction) of the housing. The bottom of the housing is provided with a projecting portion projecting toward the inner peripheral side, the projecting portion is provided with a stopper portion capable of restricting the movable body from flying out of the housing, and a region including at least the stopper portion is bonded to the cover. Thus, the stopper can be reinforced by bonding the cover to the stopper. Therefore, the risk of damage to the protruding portion due to impact at the time of dropping can be reduced, and the impact resistance of the optical unit with shake correction function can be improved.
Drawings
Fig. 1 is an external perspective view of an optical unit with a shake correction function to which embodiment 1 of the present invention is applied.
Fig. 2 is an exploded perspective view of the optical unit with shake correction function of fig. 1 as viewed from the subject side.
Fig. 3 is an exploded perspective view of the optical unit with a shake correction function of fig. 1 as viewed from the image side.
Fig. 4 is a plan view of the optical unit with the shake correction function with the first cover removed.
Fig. 5 is a cross-sectional view of the optical unit with shake correction function of fig. 1 (a cross-sectional view cut at a position a-a of fig. 1).
Fig. 6 is an exploded perspective view of the gimbal frame, the first thrust receiving member, and the second thrust receiving member.
Fig. 7 is a bottom view of the optical unit with shake correction function with the second cover removed.
Fig. 8 is a bottom view of the fixing body and the holder with the second cover removed, and a bottom view of the optical module.
Fig. 9 is a perspective view of the second cover when the fixing member, the holder, and the optical module are removed from the image side.
Fig. 10 is a sectional view (a sectional view cut at a position B-B in fig. 7) of the optical unit with shake correction function of fig. 1 and a partially enlarged view thereof.
Fig. 11 is an exploded perspective view of an optical unit with a shake correction function according to embodiment 2 of the present invention, as viewed from the subject side.
Fig. 12 is a perspective view of the optical unit with shake correction function according to embodiment 2 with the second cover removed from the image side and a partially enlarged view thereof.
Fig. 13 is a sectional view of an optical unit with a shake correction function according to embodiment 2 and a partially enlarged view thereof.
[ description of reference numerals ]
1. 100 … optical unit with shake correction function; 2 … optical module; 2a … lens group; 3 … movable body; 4 … gimbal mechanism; 5. 105 … fixed body; 6 … shake correction drive mechanism; a 6X … first magnetic drive mechanism; 6Y … second magnetic drive mechanism; 7 … a first flexible printed substrate; 8 … a second flexible printed substrate; 9 … gimbal frame; 20 … a housing; 21 … a first side; 22 … second side; 23 … third side; 24 … fourth face; 25 … a substrate; 26 … a barrel portion; 27 … lens drive mechanism; 28 … projection; 30 … holding rack; 31 … first frame portion; 32 … second frame portion; 33 … third frame portion; 34 … fourth frame portion; 35 … notch portion; 36 … convex portions; 37 … magnet arrangement concave part; 38, 38 … corner; 39 … recess; 41 … a first fulcrum portion; 42 … second fulcrum portion; 43 … recess; 44 … a first thrust bearing member; 45 … recess; 46 … second thrust bearing member; 50 … a housing; 50A … outer frame portion; 50B … wiring housing part; a 50C … extension; a 50D … opening; 51 … first cover; 52 … second cover; 53 … wiring cover; 54 … coil arrangement holes; a 55 … stop; 56 … notch portion; 57 … abutment; 58 … elastic snap-fit portion; a 59 … jaw portion; 61X, 61Y … magnets; 62X, 62Y … coils; 63 … yoke member; 64 … magnetic plates; 65 … magnetic sensor; 70 … flexible substrate; 71 … a first folded back portion; 72 … second folded portion; 73 … third return portion; 74 … fastening part; 75 … reinforcing plates; 81 … a first substrate portion; 82 … a second substrate portion; 90 … center hole; 91 … a first frame portion; 92 … second frame portion; 93 … extending part for the first supporting part; 94 … second support part extension; 110 … first cover; 120 … second cover; 120A … bottom cover; 120B … sealing the cover; 121 … inner opening part; 122 … a first cover portion; 123 … second cover part; 124 … a first side panel portion; 125 … second side panel portion; 126 … adhesive containment wall; 127 … an adhesive layer; 130 … wiring cover; 150 … a housing; 150a … outer frame portion; 150B … wiring receiving section; 150C … extensions; 150D … opening; 155 … stop; 156 … notch portion; 391 … a first recess; 392 … a second recess; 393 … a stopper; 441 … a first plate portion; 442 … second plate portion; 443 … through holes; 444 … sphere; 461 … first plate portion; 462 … second plate portion; 463 … through holes; 464 … sphere; 501 … first frame portion; 502 … second frame portion; 503 … a third frame portion; 504 … fourth frame portion; 505 … fifth frame portion; 506 … sixth frame portion; 507 … seventh frame portion; 508 … notch portion; 510 … an opening; 511. 512 … notch portion; 531 … notch part; 550 … end face of the housing; 551 … first frame portion; 551C … first extension; 552 … a second frame portion; 552C … second projection; 553 … third frame portion; 554 … fourth frame portion; 554C … fourth extension; 555 … fifth frame portion; 556 … sixth frame portion; 557 … upper plate portion; 558 … notch portion; 559 … through-hole; 561 … first notch part; 562 … second notched portion; 600 … protrusions; 601 … recess; 901 … a first support; 902 … a second support portion; 910 … rectangular portion; 911 … center portion; 912, 912 … corner portions; 913 … a first projection; 914 … second projection; 941 … first part; 942 … second part; 943 … third part; an L … optical axis; r1 … first axis; r2 … second axis; s … gap; thickness of the T1 … projection; t2 … thickness of second cover.
Detailed Description
Hereinafter, an embodiment of an optical unit 1 with a shake correction function to which the present invention is applied will be described with reference to the drawings. In this specification, the three XYZ axes are orthogonal to each other, and one side in the X axis direction is represented by + X, the other side is represented by-X, one side in the Y axis direction is represented by + Y, the other side is represented by-Y, one side in the Z axis direction is represented by + Z, and the other side is represented by-Z. The Z-axis direction coincides with the optical axis L direction of the optical module 2. Therefore, the + Z direction is one side in the optical axis L direction and is the subject side. the-Z direction is the other side of the optical axis L direction and is the image side.
[ embodiment 1]
(Overall Structure)
Fig. 1 is a perspective view of an optical unit 1 with a shake correction function to which embodiment 1 of the present invention is applied. Fig. 2 is an exploded perspective view of the optical unit 1 with shake correction function of fig. 1 when viewed from the subject side (+ Z direction). Fig. 3 is an exploded perspective view of the optical unit 1 with a shake correction function of fig. 1 viewed from the image side (-Z direction). Fig. 4 is a plan view of the optical unit 1 with shake correction function with the first cover 51 removed, and is a plan view when viewed from the subject side (+ Z direction). Fig. 5 is a cross-sectional view of the optical unit 1 with shake correction function of fig. 1 (a cross-sectional view cut at a position a-a of fig. 1). Fig. 6 is an exploded perspective view of the gimbal frame 9, the first thrust receiving member 44, and the second thrust receiving member 46.
As shown in fig. 1, an optical unit 1 with a shake correction function according to embodiment 1 includes an optical module 2 including an optical element such as a lens. The optical unit 1 with a shake correction function is used for optical apparatuses such as a camera-equipped mobile phone and a drive recorder, a sport camera mounted on a mobile body such as a helmet, a bicycle, and a wireless control helicopter, and a wearable camera. In such an optical device, if the optical device shakes during shooting, the shot image is disturbed. In order to avoid the inclination of the captured image, the optical unit 1 with the shake correction function corrects the inclination of the optical module 2 based on the acceleration, the rotation speed, the shake amount, and the like detected by the detection unit such as a gyroscope.
As shown in fig. 1 to 5, an optical unit 1 with a shake correction function according to embodiment 1 includes a movable body 3 on which an optical module 2 is mounted, a gimbal mechanism 4 that swingably supports the movable body 3, a fixed body 5 that supports the movable body 3 via the gimbal mechanism 4, a shake correction drive mechanism 6 that swings the movable body 3 with respect to the fixed body 5, a first flexible printed board 7 connected to the movable body 3, and a second flexible printed board 8 attached to the fixed body 5. First flexible printed circuit board 7 includes a connector portion provided at an end opposite to the side connected to movable body 3. The second flexible printed circuit board 8 includes a terminal portion provided at an end portion opposite to the side attached to the fixed body 5.
The optical unit 1 with a shake correction function performs shake correction by swinging the movable body 3 about two axes (X axis and Y axis) intersecting the optical axis L (Z axis) and intersecting each other. By performing the shake correction around the X axis and the shake correction around the Y axis, the shake correction in the pitch (pitch) direction and the shake correction in the yaw (yaw) direction are performed.
As shown in fig. 1 and 4, the movable body 3 is swingably supported by the gimbal mechanism 4 about a first axis R1 orthogonal to the optical axis L (Z axis), and is swingably supported about a second axis R2 orthogonal to the optical axis L and the first axis R1. The first and second axes R1 and R2 are inclined at 45 degrees with respect to the X and Y axes. By combining the rotation about the first axis R1 and the rotation about the second axis R2, the movable body 3 can swing about the X axis and about the Y axis. Therefore, movable body 3 is supported by gimbal mechanism 4 so as to be swingable about the X axis and about the Y axis.
As shown in fig. 4, the gimbal mechanism 4 includes a first fulcrum portion 41 provided at a diagonal position on the first axis R1 of the movable body 3, a second fulcrum portion 42 provided at a diagonal position on the second axis R2 of the fixed body 5, and the gimbal frame 9. The gimbal frame 9 is a metal plate spring, and includes a first support 901 provided at two positions diagonally on the first axis R1 and a second support 902 provided at two positions diagonally on the second axis R2. The gimbal mechanism 4 is assembled such that the first support portion 901 makes point contact with the first fulcrum portion 41 and the second support portion 902 makes point contact with the second fulcrum portion 42. Thereby, the movable body 3 is swingably supported about the first axis R1 via the gimbal frame 9, and is swingably supported about the second axis R2.
As shown in fig. 2 to 4, the shake correction drive mechanism 6 includes a first magnetic drive mechanism 6X for rotating the movable body 3 about the X axis and a second magnetic drive mechanism 6Y for rotating the movable body 3 about the Y axis. The first magnetic drive mechanism 6X includes a pair of magnets 61X and a coil 62X. The second magnetic driving mechanism 6Y includes a pair of magnets 61Y and coils 62Y. The magnet 61X and the coil 62X of the first magnetic drive mechanism 6X face each other in the Y axis direction. In embodiment 1 in which the magnet 61Y and the coil 62Y of the second magnetic drive mechanism 6Y face each other in the X axis direction, the magnets 61X and 61Y are disposed on the movable body 3, and the coils 62X and 62Y are disposed on the fixed body 5. The arrangement of the magnets 61X and 61Y and the coils 62X and 62Y may be reversed from that of embodiment 1. That is, magnets 61X and 61Y may be disposed on fixed body 5, and coils 62X and 62Y may be disposed on movable body 3.
First magnetic drive mechanism 6X is disposed on the side surface of movable body 3 in the-Y direction. Second magnetic drive mechanism 6Y is disposed on the side surface of movable body 3 in the + X direction. The first flexible printed circuit board 7 connected to the movable body 3 is drawn out from the + Y direction side surface of the outer peripheral surface of the movable body 3 where the first magnetic driving mechanism 6X and the second magnetic driving mechanism 6Y are not disposed. In embodiment 1, as will be described later, a first folded portion 71 that folds the first flexible printed circuit board 7 in the + Z direction and in the opposite direction once is disposed on the side surface of the movable body 3 in the + Y direction.
(Movable body)
As shown in fig. 2 and 3, movable body 3 includes optical module 2 and holder 30 for holding optical module 2. The optical module 2 includes a housing 20 having a rectangular shape when viewed in the direction of the optical axis L, a substrate 25 disposed at an end of the housing 20 in the-Z direction, a tube 26 protruding from the housing 20 in the + Z direction, a lens group 2A (optical element) held in the tube 26, and a lens driving mechanism 27 (see fig. 4 and 5) disposed inside the housing 20. An imaging element (not shown) is mounted on the substrate 25. The optical module 2 is a camera module including a lens group 2A, a lens driving mechanism 27, and an imaging element.
The lens driving mechanism 27 performs focusing on the subject by adjusting the lens position of the lens group 2A arranged in the direction of the optical axis L. The lens driving mechanism 27 includes a magnetic driving mechanism. The lens driving mechanism 27 may be provided with a driving source other than the magnetic driving mechanism. For example, a motor may be provided. The lens drive mechanism 27 is disposed on the opposite side of the first magnetic drive mechanism 6X or the second magnetic drive mechanism 6Y with respect to the optical axis L. In embodiment 1, the lens drive mechanism 27 is disposed on the opposite side of the first magnetic drive mechanism 6X with respect to the optical axis L.
The holder 30 is a frame-shaped member surrounding the outer periphery of the optical module 2. The housing 20 includes a first side surface 21 facing the + X direction, a second side surface 22 facing the-X direction, a third side surface 23 facing the + Y direction, and a fourth side surface 24 facing the-Y direction. The holder 30 includes a first frame 31 along the first side surface 21 of the housing 20, a second frame 32 along the second side surface 22, a third frame 33 along the third side surface 23, and a fourth frame 34 along the fourth side surface 24. The first frame portion 31, the second frame portion 32, and the fourth frame portion 34 are in contact with the housing 20. On the other hand, a gap S is provided between the third frame 33 and the third side 23 of the housing 20 (see fig. 5). The third frame portion 33 includes a notch 35 formed by cutting the end in the-Z direction into the + Z direction. The first flexible printed circuit board 7 is bent in the + Y direction after the first folded portion 71 disposed along the third side 23 of the housing 20 is formed, and is drawn out of the notch portion 35 to the outside of the holder 30.
In the gap S provided between the third frame 33 and the third side 23 of the housing 20, a first folded portion 71 that folds back the first flexible printed circuit board 7 once is disposed. The first folded portion 71 extends in the Z-axis (optical axis L) direction along the + Y-direction side surface of the housing 20. The first flexible printed circuit board 7 is bent at substantially right angles at the end in the-Z direction of the first folded portion 71, and is drawn out to the + Y direction side of the holder 30 through the notch 35 provided in the third frame portion 33.
As shown in fig. 2 and 3, the holder 30 includes a first fulcrum portion 41 of the gimbal mechanism 4. In embodiment 1, the first supporting point portion 41 is provided at each of two positions, i.e., the inner surface of the corner portion where the second frame portion 32 and the third frame portion 33 are connected to each other and the inner surface of the corner portion where the first frame portion 31 and the fourth frame portion 34 are connected to each other. The first fulcrum portion 41 includes a recess 43 that is recessed radially outward, and a first thrust receiving member 44 that is disposed in the recess 43. As shown in fig. 6, the first thrust receiving member 44 includes a plate-shaped first plate portion 441 extending in the Z-axis (optical axis L) direction, and a second plate portion 442 bent at substantially right angles from an end portion of the first plate portion 441 in the-Z direction and extending radially inward. The second plate portion 442 abuts against an inner surface of the recess 43 provided in the holder 30 in the-Z direction in the Z-axis (optical axis L) direction, whereby the first fulcrum portion 41 is positioned in the Z-axis (optical axis L) direction.
As shown in fig. 6, the first thrust receiving member 44 is provided with a through hole 443 penetrating the first plate part 441, and the spherical body 444 is fixed to the through hole 443 from the radially inner side. The first thrust receiving member 44 is made of metal, and the spherical body 444 is fixed to the first plate portion 441 by welding. The ball 444 is in point contact with a first support portion 901 provided on the gimbal frame 9. First support portion 901 is a concave curved surface having a radius of curvature larger than that of ball 44, and elastically contacts ball 444 from the radially inner side.
The retainer 30 includes a convex portion 36 protruding from the end surfaces in the + Z direction of the first frame portion 31, the second frame portion 32, the third frame portion 33, and the fourth frame portion 34. The convex portion 36 is provided at each of the centers of the first frame portion 31 and the second frame portion 32 in the Y axis direction and the centers of the third frame portion 33 and the fourth frame portion 34 in the X axis direction. The protruding heights of the four convex portions 36 in the + Z direction are the same. The convex portion 36 functions as a stopper that limits the range of oscillation of the movable body 3 about the first axis R1. That is, when movable body 3 swings about first axis R1 and about second axis R2, protruding portion 36 contacts first cover 51 of fixed body 5, thereby restricting the swing range of movable body 3.
A corner portion 38 is provided at a diagonal position in the first axis R1 direction of the holder 30 so as to surround the recess 43 constituting the first fulcrum portion 41 of the gimbal mechanism 4 from the radially outer side. The corner portion 38 faces the first cover 51 in the direction of the optical axis L at a diagonal position in the direction of the first axis R1. The corner 38 is located radially outward of the gimbal frame 9 and on the-Z direction side of the projection 36. When movable body 3 swings about second axis R2, the swing range of movable body 3 is restricted by corner portion 38 contacting first cover 51.
The holder 30 includes a magnet arrangement recess 37 in which the magnet 61X of the first magnetic drive mechanism 6X and the magnet 61Y of the second magnetic drive mechanism 6Y are arranged. In embodiment 1, a magnet placement recess 37 is formed in the first frame portion 31 and the fourth frame portion 34. The magnet arrangement recess 37 is recessed radially inward. Since the holder 30 is made of resin, the plate-shaped yoke member 63 is disposed in the magnet disposition recess 37. The yoke member 63 is fixed to the inner surface of the magnet placement recess 37, and the magnets 61X and 61Y are fixed to the radially outer surface of the yoke member 63. The magnets 61X and 61Y are magnetized such that the magnets facing radially outward are different from each other with respect to a magnetization polarization line located substantially at the center in the Z-axis (optical axis L) direction.
(stationary body)
The fixed body 5 includes a housing 50, a first cover 51 and a second cover 52 fixed to the housing 50, and a wiring cover 53. The case 50 is made of resin, and the first cover 51, the second cover 52, and the wiring cover 53 are made of nonmagnetic metal. The case 50 includes an outer frame portion 50A surrounding the outer periphery of the movable body 3, a wiring housing portion 50B protruding in the + Y direction from a portion on the-Z direction side of the outer frame portion 50A, and an extending portion 50C extending inward from an end portion on the-Z direction side (image side) of the outer frame portion 50A. The first cover 51 is fixed to the end of the outer frame portion 50A in the + Z direction. The second cover 52 is fixed to the-Z direction end portions of the extension portion 50C and the wiring housing portion 50B. The wire cover 53 is fixed to the end of the wire housing portion 50B in the + Z direction.
Elastic engaging portions 58 are provided on the outer peripheral edges of the first cover 51, the second cover 52, and the wiring cover 53. Further, a claw portion 59 is provided on the outer peripheral surface of the housing 50. The elastic engaging portion 58 is a metal sheet extending in the Z-axis (optical axis L) direction, and includes an opening into which the claw portion 59 is fitted. The claw portion 59 protrudes radially outward from an inner surface of a recess formed in the outer peripheral surface of the housing 50. The first cover 51, the second cover 52, and the wiring cover 53 are fixed to the case 50 by engaging the elastic engaging portions 58 with the claw portions 59. The first cover 51 includes a contact portion 57 bent at substantially right angles from the + Y-direction edge and extending in the-Z direction. The contact portion 57 contacts the third frame portion 503 of the outer frame portion 50A from the outer peripheral side (+ Y direction).
First cover 51 faces the outer peripheral portion of movable body 3 disposed inside outer frame portion 50A in the Z-axis direction, and restricts movable body 3 from flying out in the + Z direction. The first cover 51 includes a substantially rectangular opening 510. In embodiment 1, a part of the gimbal frame 9 protrudes from the opening 510 in the + Z direction. The cylindrical portion 26 of the optical module 2 protrudes in the + Z direction from a central hole 90 provided at the center in the radial direction of the gimbal frame 9. The first cover 51 is located at the end of the fixed body 5 in the + Z direction. Therefore, the optical module 2 and a part of the gimbal frame 9 protrude further in the + Z direction than the end of the fixed body 5 in the + Z direction.
The outer frame portion 50A includes a first frame portion 501 and a second frame portion 502 extending in parallel to the Y axis direction on the + X direction side and the-X direction side of the movable body 3, and a third frame portion 503 and a fourth frame portion 504 extending in parallel to the X axis direction on the + Y direction side and the-Y direction side of the movable body 3. The wiring housing portion 50B includes a fifth frame portion 505 and a sixth frame portion 506 extending from the end portions of the first frame portion 501 and the second frame portion 502 in the-Z direction in parallel to the + Y direction, and a seventh frame portion 507 connected to the end portions of the fifth frame portion 505 and the sixth frame portion 506 in the + Y direction and extending in the X axis direction.
The outer frame portion 50A is provided with a notch portion 508 formed by cutting the end portion of the third frame portion 503 in the-Z direction in the + Z direction. The first flexible printed board 7 extends from the notch 508 to the inside of the wiring housing portion 50B. The first flexible printed circuit board 7 includes a second folded portion 72 extending in the + Y direction inside the wiring storage portion 50B and folded back once in the opposite direction, and a third folded portion 73 overlapping the + Z direction side of the second folded portion 72.
The wiring cover 53 includes a notch 531 formed by cutting a substantially center of the edge in the-Y direction in the + Y direction. The third folded portion 73 of the first flexible printed circuit 7 is drawn out from the notch 531 to the outside of the wiring housing portion 50B, and extends along the wiring cover 53 in the + Y direction side. The first flexible printed circuit board 7 includes a fixing portion 74 fixed to the wiring cover 53. The fixing portion 74 is fixed to the edge of the notch portion 531.
The first flexible printed circuit board 7 includes a flexible substrate 70 and a reinforcing plate 75 fixed to the flexible substrate 70. The reinforcing plate 75 is disposed at the first folded portion 71 and the second folded portion 72, and functions as a spacer sandwiched between the flexible substrates 70 bent in opposite directions. The reinforcing plate 75 provided in the fixing portion 74 is disposed between the wiring cover 53 and the flexible board 70, and functions as a spacer between the wiring cover 53 and the flexible board 70.
The outer frame portion 50A includes the second fulcrum portion 42 of the gimbal mechanism 4. In embodiment 1, the second supporting point portion 42 is provided at each of two positions of the inner surface of the corner portion where the first frame portion 501 and the third frame portion 503 are connected to each other and the inner surface of the corner portion where the second frame portion 502 and the fourth frame portion 504 are connected to each other. The second fulcrum portion 42 includes a recess 45 recessed radially outward and a second thrust receiving member 46 disposed in the recess 45. As shown in fig. 6, the second thrust receiving member 46 includes a first plate portion 461 extending in the direction of the optical axis L and a second plate portion 462 bent at substantially right angles from an end portion of the first plate portion 461 in the-Z direction and extending radially inward. The second plate portion 462 abuts against an inner surface of the recess 45 provided in the outer frame portion 50A in the-Z direction in the Z-axis (optical axis L) direction, whereby the second fulcrum portion 42 is positioned in the Z-axis (optical axis L) direction.
As shown in fig. 6, the second thrust receiving member 46 is provided with a through hole 463 penetrating the first plate portion 461, and the spherical body 464 is fixed to the through hole 443 from the radially inner side. The second thrust receiving member 46 is made of metal, and the spherical body 464 is fixed to the first plate portion 461 by welding. The spherical body 464 makes point contact with the second support portion 902 provided to the gimbal frame 9. The second support portion 902 is a concave curved surface having a radius of curvature larger than that of the spherical body 464, and elastically contacts the spherical body 464 from the radially inner side.
The outer frame portion 50A includes a coil arrangement hole 54, and the coil 62X of the first magnetic drive mechanism 6X and the coil 62Y of the second magnetic drive mechanism 6Y are fixed to the coil arrangement hole 54 by an adhesive or the like. The coil arrangement hole 54 penetrates the first frame portion 501 and the fourth frame portion 504. The coils 62X, 62Y are elliptical air-core coils, and two long sides located on the + Z direction side and the-Z direction side are used as effective sides. The second flexible printed circuit board 8 is fixed to the outer frame portion 50A from the radially outer side with respect to the first frame portion 501 and the fourth frame portion 504. The second flexible printed circuit 8 includes a first substrate portion 81 overlapping the coil arrangement hole 54 of the fourth frame portion 504 from the radially outer side, and a second substrate portion 82 overlapping the coil arrangement hole 54 of the first frame portion 501 from the radially outer side.
Rectangular magnetic plates 64 are disposed between the first substrate portion 81 and the coil 62X and between the second substrate portion 82 and the coil 62Y, respectively. The magnetic plate 64 disposed between the first substrate portion 81 and the coil 62X faces the magnet 61X, and constitutes a magnetic spring for returning the movable body 3 to a reference rotational position in the rotational direction around the X axis. The magnetic plate 64 disposed between the second substrate portion 82 and the coil 62Y faces the magnet 61Y, and constitutes a magnetic spring for returning the movable body 3 to a reference rotational position in the rotational direction around the Y axis.
The magnetic plate 64 has a rectangular through hole at a position overlapping the center holes of the coils 62X and 62Y, and the magnetic sensor 65 is disposed in the through hole. The magnetic sensor 65 is, for example, a hall element. The optical unit 1 with the shake correction function detects the swing angle of the movable body 3 about the X axis from the output of the magnetic sensor 65 disposed at the center of the coil 62X. The swing angle of movable body 3 about the Y axis is detected based on the output of magnetic sensor 65 disposed at the center of coil 62Y.
(Universal frame)
As shown in fig. 6, the gimbal frame 9 includes a first frame portion 91 and a second frame portion 92, the first frame portion 91 having a substantially rectangular shape when viewed from the Z-axis direction, and the second frame portion 92 being bent at substantially right angles from the corners of four portions of the first frame portion 91 and extending in the-Z direction. The second frame portion 92 is disposed at a first pair of angular positions on both sides in the direction of the first axis R1 of the first frame portion 91 and at a second pair of angular positions on both sides in the direction of the second axis R2 of the first frame portion 91. A central hole 90 penetrating the first frame part 91 is provided in the center of the first frame part 91.
The first frame portion 91 includes a rectangular portion 910 having a rectangular shape with the directions of the first axis R1 and the second axis R2 being diagonal directions when viewed from the Z-axis (optical axis L) direction, a first protruding portion 913 protruding radially outward from the corners on both sides of the rectangular portion 910 in the direction of the first axis R1, and a second protruding portion 914 protruding radially outward from the corners on both sides of the rectangular portion 91 in the direction of the second axis R2.
As shown in fig. 1 and 6, in the rectangular portion 910 of the first frame portion 91, a central portion 911 located at the center in the direction of the second axis R2 is recessed in the-Z direction, and corner portions 912 at both ends in the direction of the second axis R2 are located on the + Z direction side of the central portion 911. That is, the angle portion 912 of the first frame portion 91 in the direction of the second axis R2 is farther from the movable body 3 than the center portion 911. Therefore, even when movable body 3 swings about first axis R1 and both ends of movable body 3 in the direction of second axis R2 (i.e., the corner portions of case 20 in the direction of second axis R2) move in the Z-axis direction on the-Z direction side of gimbal frame 9, collision between movable body 3 and gimbal frame 9 can be avoided.
In addition, the central portion 911 extends to a corner in the direction of the first axis R1 of the first frame portion 91. Here, the corner of the first frame portion 91 in the first axis R1 direction is a portion where the gimbal frame 9 that swings about the second axis R2 about the second fulcrum portion 42 moves maximally in the Z-axis (optical axis L) direction when the movable body 3 swings about the second axis R2. In this way, in the case where the corner portion of the first frame portion 91 in the direction of the first axis R1 is of a shape recessed most in the-Z direction, the movement space of the gimbal frame 9 when the movable body 3 swings can be reduced in the Z-axis (optical axis L) direction. Therefore, the necessary height in the Z-axis (optical axis L) direction of the space in which the optical unit 1 with the shake correction function is disposed can be reduced.
The second frame portion 92 includes a first support portion extension 93 and a second support portion extension 94, the first support portion extension 93 is provided at two corners of the first axis R1 of the gimbal frame 9, and the second support portion extension 94 is provided at two corners of the second axis R2 of the gimbal frame 9. The first support portion extension 93 linearly extends in the-Z direction from the first protruding portion 913 of the first frame portion 91. At the tip end of the first support extension 93, a first support 901, which is a concave curved surface recessed radially inward, is formed by press working. The second support portion extending portion 94 includes a first portion 941 extending in the-Z direction from the second projecting portion 914 of the first frame portion 91, a second portion 942 bent at a substantially right angle from the first portion 941 and extending radially outward, and a third portion 943 bent at a substantially right angle from the second portion 942 and extending in the-Z direction. A second support portion 902, which is a concave curved surface recessed inward in the radial direction, is formed at the tip end portion of the third portion 943 by press working.
The first support portion extending portion 93 is disposed in a notch portion 511 formed by cutting a corner portion of the opening portion 510 of the first cover 51 in the first axis R1 direction radially outward. A first fulcrum portion 41 is disposed on the-Z direction side of the cutout portion 511, the first fulcrum portion 41 is a fulcrum portion of the gimbal mechanism 4 provided on the movable body 3 side, and the tip end portion of the first support portion extending portion 93 is supported by the first fulcrum portion 41. The second support portion extension 94 is disposed in a notch 512 formed by cutting a corner portion of the opening portion 510 of the first cover 51 in the direction of the second axis line R2 radially outward. A second fulcrum portion 42 is disposed on the-Z direction side of the cutout portion 512, the second fulcrum portion 42 being a fulcrum portion of the gimbal mechanism 4 provided on the fixed body 5 side, and a distal end portion of the second support portion extension portion 94 being supported by the second fulcrum portion 42.
The first support portion extension 93 and the second support portion extension 94 elastically deform in the radial direction. Therefore, the first support portion 901 provided at the distal end of the first support portion extension 93 elastically contacts the ball 44 provided at the first fulcrum portion 41. Further, the second support portion 902 provided at the distal end portion of the second support portion extension 94 elastically contacts the spherical body 464 provided at the second fulcrum portion 42. Thus, the first support portion extension 93 and the second support portion extension 94 are less likely to come off the first fulcrum portion 41 and the second fulcrum portion 42, and the vibration of the fulcrum portions is suppressed.
(positioning reference of optical Module)
Fig. 7 is a bottom view of the optical unit 1 with shake correction function with the second cover 52 removed. Fig. 8 (a) is a bottom view of the fixing body 5 and the holder 30 with the second cover 52 removed, and fig. 8 (b) is a bottom view of the optical module 2. Fig. 8 and 9 are views as viewed from the-Z direction (image side). Fig. 9 is a perspective view of the fixing body 5 of the second cover 52, the holder 30, and the optical module 2 when they are removed from the-Z direction (image side). As shown in fig. 2 and 9, the optical module 2 includes a plurality of protruding portions 28 protruding toward the outer peripheral side. Further, a plurality of concave portions 39 that are concave in the + Z direction (toward the subject side) are formed on the inner peripheral edge of the end surface of the holder 30 in the-Z direction. As shown in fig. 8 and 9, the recess 39 includes a first recess 391 provided at four locations overlapping the protrusion 28 when viewed in the Z-axis (optical axis L) direction, and a second recess 392 provided at two locations different from the location overlapping the protrusion 28.
As shown in fig. 2 and 9, the protruding portion 28 protrudes from the end portion of the housing 20 in the-Z direction (image side) toward the outer peripheral side. Therefore, the protruding portion 28 is disposed at the end of the housing 20 closest to the substrate 25. The protruding portions 28 are formed on two side surfaces (the first side surface 21 and the second side surface 22) facing opposite sides with respect to the Z axis (the optical axis L) on the housing 20. At the end of the first side surface 21 in the-Z direction, two portions separated in the Y direction are formed with protruding portions 28 protruding in the + X direction. In addition, at the end of the second side surface 22 in the-Z direction, two portions separated in the Y direction are formed with projections 28 projecting in the-X direction. On the other hand, in the holder 30, the first recess 391 has holding portions 30 formed at two locations on a first frame portion 31 of the housing 20 located in the + X direction and a second frame portion 32 of the housing 20 located in the-X direction, respectively. In addition, in the fourth frame portion 34 of the housing 20 located in the-Y direction, second recesses 392 are formed at two locations separated in the X direction.
Fig. 10 is a cross-sectional view (cross-sectional view cut at a position B-B in fig. 7) of the optical unit 1 with shake correction function of fig. 1. The holder 30 is provided with a stopper 393 that restricts movement of the optical module 2 in the + Z direction (toward the subject side). The stopper 393 is a bottom surface of the first recess 391. When movable body 3 is assembled, housing 20 is inserted from the-Z direction (image side) toward the inside of holder 30. At this time, as shown in fig. 10, the housing 20 is inserted to a position where the protrusion 28 abuts against the stopper 393 (the bottom surface of the first recess 391) from the-Z direction (the image side). Thereby, the optical module 2 is positioned in the Z-axis (optical axis L) direction with respect to the holder 30. In this way, the movable body 3 is assembled with the protruding portion 28 as a reference for positioning the optical module 2 in the direction of the optical axis L.
(bottom shape of case)
As shown in fig. 2 and 9, the case 50 includes an extension portion 50C extending inward from an end portion on the-Z direction side (image side) of the outer frame portion 50A surrounding the outer periphery of the holder 30. The extension portion 50C extends from the first frame portion 501, the second frame portion 502, and the fourth frame portion 504 of the outer frame portion 50A toward the inner peripheral side. A substantially rectangular opening 50D is formed on the inner peripheral side of the extension portion 50C. A notch 508 for drawing out the first flexible printed circuit board 7 is formed in the third frame 503 positioned in the + Y direction of the opening 50D. Therefore, the opening 50D is continuous with the space inside the wiring housing portion 50B.
As shown in fig. 7 and 8 (a), the inner peripheral edge of the holder 30 is smaller than the opening 50D. Therefore, when the housing 50 and the holder 30 are viewed from the direction of the optical axis L, the inner peripheral edge of the holder 30 is positioned on the inner peripheral side of the opening 50D. On the other hand, the outer peripheral portion of the retainer 30 is positioned on the outer peripheral side of the opening 50D. Therefore, the protruding portion 50C includes a stopper portion 55 that overlaps the holder 30 when viewed from the optical axis L direction. The stopper 55 is a portion on the inner peripheral side of the outer peripheral surface of the retainer 30 shown by a chain line in fig. 7. Since the housing 50 includes the stopper 55, the movable body 3 is restricted from flying out of the housing 50 in the-Z direction.
The opening 50D is closed by a second cover 52 fixed to an end of the housing 50 in the-Z direction. The second cover 52 is locked to the housing 50 by the locking structure constituted by the elastic engagement portion 58 of the second cover 52 and the claw portion 59 of the housing 50, and is fixed to the extension portion 50C by an adhesive. Therefore, the protruding portion 50C is reinforced by the second cover 52. The adhesive is applied at least to stopper portion 55 where movable body 3 may collide. Thus, when the movable body 3 collides with the stopper 55 due to an impact or the like at the time of falling, the stopper 55 is bent, and the risk of damage to the protruding portion 50C is reduced. In embodiment 1, an adhesive is applied to the entire region of the extension portion 50C to fix the second cover 52, and the entire bottom of the case 50 is reinforced by the second cover 52.
As shown in fig. 10, when the thickness of the extension portion 50C in the optical axis L direction is T1 and the thickness of the second cover 52 in the optical axis L direction is T2, T2 is smaller than T1. Since the second cover 52 is made of metal, the rigidity is high even if the thickness is reduced. For example, when the second cover 52 is made of metal, the minimum thickness is 0.1 mm. On the other hand, the housing 50 is a resin component, and the minimum thickness that can be molded is 0.3 mm. Therefore, in reinforcing the protruding portion 50C, the structure of fixing the metal second cover 52 can reduce the thickness of the reinforced portion in the optical axis L direction, as compared with the case of reinforcing the protruding portion 50C by increasing the thickness of the resin. Therefore, it is possible to suppress an increase in the height of the optical unit 1 with a shake correction function in the optical axis L direction due to the reinforcement.
As shown in fig. 7 to 9, a notch 56 recessed toward the outer peripheral side is formed on the inner peripheral edge of the extension portion 50C. The cutout 56 includes a first cutout 561 cut to surround the outer periphery of the first recess 391 of the holder 30 when viewed in the Z-axis (optical axis L) direction, and a second cutout 562 cut to surround the outer periphery of the second recess 392 of the holder 30 when viewed in the Z-axis (optical axis L) direction. The first notch 561 is formed at two positions on the inner peripheral edge of the extending portion 50C on the + X direction side and the inner peripheral edge of the extending portion on the-X direction side, respectively. Further, a second notch 562 is formed on the inner peripheral edge of the protruding portion 50C on the-Y direction side.
As shown in fig. 7, the first recess 391 and the second recess 392 formed in the holder 30 are located on the inner peripheral side of the extension portion 50C when viewed from the optical axis L direction. More specifically, the axial width of the first notch 561Y is larger than the first recess 391, and the depth in the X-axis direction is larger than the first recess 391. Therefore, when viewed from the optical axis L direction, the inner peripheral edge of the first notched portion 561 has a shape surrounding the outer peripheral side of the first concave portion 391, and the first concave portion 391 is disposed inside the first notched portion 561. Similarly, the second cutaway portion 562 has a width in the X-axis direction larger than the second recess 392 and a depth in the Y-axis direction larger than the second recess 392. Therefore, when viewed from the optical axis L direction, the inner peripheral edge of the second notched portion 562 has a shape surrounding the outer peripheral side of the second concave portion 392, and the second concave portion 392 is disposed inside the second notched portion 562.
When the optical unit 1 with shake correction function is incorporated, the holder 30 is disposed inside the housing 50, and the shake correction drive mechanism 6 is incorporated between the housing 50 and the holder 30. Then, the optical module 2 is inserted from the-Z direction side (image side) and fixed to the holder 30 disposed inside the housing 50. Then, the second cover 52 is fixed to the case 50 to close the opening 50D.
The optical module 2 is inserted from the protruding portion 50C side into the inside of the housing 50. As described above, since the protrusion 28 of the optical module 2 is disposed on the inner peripheral side of the extension 50, the optical module 2 can be inserted into the holder 30 without interfering with the extension 50. Since the first notch 561 is formed in the projecting portion 50C, when the optical module 2 is inserted into the holder 30, the projecting portion 28 passes through the first notch 561, and the stopper portion 55 and the projecting portion 28 do not interfere with each other.
The optical module 2 is fixed to the holder 30 by an adhesive. First concave portion 391 and second concave portion 392 of holder 30 are used as an adhesive pool at the time of assembling movable body 3. At this time, the first notch 561 and the second notch 562 provided in the extension portion 50C function as window portions through which the syringe for applying the adhesive passes. That is, when the adhesive is applied to first concave portion 391, the adhesive is applied by passing the syringe for applying the adhesive through first notch 561 and allowing the tip of the syringe to reach first concave portion 391. When the adhesive is to be applied to the second concave portion 392, the adhesive is applied by passing the syringe for applying the adhesive through the second notch 562 so that the tip end of the syringe reaches the second concave portion 392. This allows the adhesive to be applied from the outside of the extension portion 50C in a state where the holder 30 is mounted inside the case 50.
(main effects of embodiment 1)
As described above, the optical unit 1 with shake correction function according to embodiment 1 includes: a movable body 3; a gimbal mechanism 4 as a swing support mechanism for swingably supporting the movable body 3 about a first axis R intersecting the optical axis L and for swingably supporting the movable body 3 about a second axis R2 intersecting the optical axis L and the first axis R1; a fixed body 5 that supports the movable body 3 via a gimbal mechanism 4 as a swing support mechanism; and a shake correction drive mechanism 6 that swings the movable body 3 about the first axis R1 and about the second axis R2. The fixed body 5 includes a case 50 and a second cover 52, the case 50 includes an outer frame portion 50A surrounding the outer periphery of the movable body 3 and an extension portion 50C extending inward from the end portion on the image side of the outer frame portion 50A in the direction of the optical axis L, and the second cover 52 is fixed to the case 50 from the image side of the optical axis L and closes an opening portion 50D provided on the inner periphery of the extension portion 50C. The protruding portion 50C includes a stopper 55 overlapping the movable body 3 when viewed from the optical axis L direction, and a region including at least the stopper 55 is bonded to the second cover 52.
As described above, in embodiment 1, fixed body 5 includes casing 50 that houses movable body 3, and second cover 52 fixed to the bottom portion (the end portion on the image side in the direction of optical axis L) of casing 50. A protruding portion 50C protruding inward is provided at the bottom of the case 50, the protruding portion 50C includes a stopper portion 55 capable of restricting the movable body 3 from flying out of the case 50, and at least a region including the stopper portion 55 is bonded to the second cover 52. Thus, the stopper 55 can be reinforced by bonding the second cover 52 to the stopper 55. Therefore, the stopper 55 can be reduced from being damaged by an impact caused by dropping or the like, and the risk of damage to the protruding portion 50C can be reduced. Therefore, the impact resistance of the optical unit 1 with a shake correction function can be improved.
In embodiment 1, since the entire region of the extension portion 50C is bonded to the second cover 52, the entire extension portion 50C is reinforced, and the entire bottom surface of the case 50 is reinforced by the second cover 52. Therefore, the impact resistance of the optical unit 1 with shake correction function can be further improved as compared with the case where only the stopper 55 is bonded to the second cover 52.
In embodiment 1, the thickness T2 of the second cover 52 in the optical axis L direction is smaller than the thickness T1 of the extension 50C in the optical axis L direction. When the second cover 52 and the housing 50 are made of different materials and a material having high rigidity is used as the second cover 52, the reinforcing effect can be improved even if the second cover 52 is made thin. Therefore, an increase in the dimension in the optical axis L direction can be suppressed as compared with the case of reinforcing by increasing the thickness of the extension portion 50C. Therefore, the optical unit with the shake correction function can be advantageously thinned.
In embodiment 1, the case 50 is a resin component, and the second cover 52 is a metal component. By resin-molding the housing 50, a complicated shape can be integrally formed. Therefore, the number of parts can be reduced. In addition, even if the thickness of the second cover 52 is thin, the reinforcement effect is high. Therefore, as compared with the case where the thickness of the extension portion 50C is increased to increase the rigidity, the increase in the dimension of the fixed body 5 in the optical axis L direction can be suppressed. Therefore, the optical unit with the shake correction function can be advantageously thinned.
In embodiment 1, the gimbal mechanism 4 includes a gimbal frame 9 that connects the movable body 3 and the fixed body 5. A second fulcrum portion 42 that makes point contact with the gimbal frame 9 is provided at a diagonal position in the second axis R2 direction of the housing 50. The shake correction drive mechanism 6 includes a coil disposed in a coil disposition hole 54 provided in the casing 50 and a magnet fixed to the movable body 3. By forming the case 50 as a resin component, a complicated shape such as the second fulcrum portion 42 and the coil arrangement hole 54 of the gimbal mechanism 4 can be formed integrally with the case 50. This can reduce the number of parts and the number of man-hours for assembly.
In embodiment 1, the movable body 3 includes the optical module 2 and a frame-shaped holder 30 surrounding the outer peripheral side of the optical module 2. The optical module 2 is provided with a projection 28 projecting to the outer peripheral side, and the holder 30 is provided with a stopper 393 against which the projection 28 abuts from the image side in the direction of the optical axis L. The housing 50 includes a first notch 561 formed by notching the inner peripheral edge of the extension portion 50C toward the outer peripheral side, and the protruding portion 28 and the stopper 393 are located inside the first notch 561 when viewed from the optical axis L direction. In this way, since the protruding portion 28 serves as a positioning reference in the optical axis L direction of the optical module 2, the positioning reference can be arranged at a position different from the top surface of the optical module 2. Therefore, the positioning reference of the optical module 2 can be made close to the rotation center of the movable body 3, and the deviation of the center of gravity position of the movable body 3 can be reduced. In addition, although the optical module 2 is provided with the protrusion 28 as a positioning reference, when the optical module 2 is attached to the housing 30 from the bottom surface side of the housing 50, interference between the positioning reference (the protrusion 28) and the protrusion 50C can be avoided. Therefore, after the gimbal mechanism 4 and the shake correction drive mechanism 6 are assembled between the housing 50 and the holder 30, the optical unit 1 with the shake correction function can be assembled in accordance with a program for inserting the optical module 2 from the bottom surface side of the housing 50 and fixing it to the holder 30.
In embodiment 1, a first concave portion 391 that is concave toward the subject in the optical axis L direction is provided on the inner peripheral edge of the holder 30. The first recess 391 is located inside the first notch 561 as viewed from the optical axis L direction, and the stopper 393 is a bottom surface of the first recess 391. The first recess 391 is an adhesive pool in which an adhesive for fixing the optical module 2 to the holder 30 is disposed. In this way, the first notch 561 for avoiding interference between the protrusion 28 and the extension 50C can be used as a window for passing a syringe for applying an adhesive. Therefore, the adhesive can be applied to first concave portion 391 from the outside of case 50. Further, since the stopper 393 and the adhesive agent pool can be arranged at the same position, the complication of the shape of the component can be avoided.
[ embodiment 2]
Fig. 11 is an exploded perspective view of the optical unit 100 with shake correction function according to embodiment 2 of the present invention, as viewed from the subject side. Fig. 12 is a perspective view of the optical unit 100 with shake correction function according to embodiment 2 with the second cover 120 removed from the image side and a partially enlarged view thereof. Fig. 13 is a sectional view of the optical unit 100 with shake correction function according to embodiment 2 and a partially enlarged view thereof. Hereinafter, the same reference numerals are given to the components having the same functions as those of embodiment 1, and detailed description thereof is omitted.
As shown in fig. 11 and 13, the optical unit 100 with shake correction function according to embodiment 2 includes: a movable body 3 on which an optical module 2 including an optical element such as a lens is mounted, a gimbal mechanism 4 that swingably supports the movable body 3, a fixed body 105 that supports the movable body 3 via the gimbal mechanism 4, a shake correction drive mechanism 6 that swings the movable body 3 relative to the fixed body 105, a first flexible printed circuit board 7 connected to the movable body 3, and a second flexible printed circuit board 8 mounted on the fixed body 105.
The movable body 3 is swingably supported by the gimbal mechanism 4 about a first axis R1 orthogonal to the optical axis L (Z axis), and is swingably supported about a second axis R2 orthogonal to the optical axis L and the first axis R1. The first and second axes R1 and R2 are inclined at 45 degrees with respect to the X and Y axes. By combining the rotation about the first axis R1 and the rotation about the second axis R2, the movable body 3 can swing about the X axis and about the Y axis. Therefore, movable body 3 is supported by gimbal mechanism 4 so as to be swingable about the X axis and about the Y axis. The gimbal mechanism 4 is configured in the same manner as in embodiment 1.
The shake correction drive mechanism 6 is configured in the same manner as in embodiment 1 except that it includes a first magnetic drive mechanism 6X for rotating the movable body 3 about the X axis and a second magnetic drive mechanism for rotating the movable body 3 about the Y axis (in the shake correction drive mechanism 6 of embodiment 2, not shown, the second magnetic drive mechanism (not shown) is disposed in the-X direction of the movable body 3 instead of the + X direction of the movable body 3).
As shown in fig. 13, the movable body 3 includes the optical module 2 and a holder 30 that holds the optical module 2. The magnet 61X of the first magnetic drive mechanism 6X and a magnet (not shown) of the second magnetic drive mechanism are fixed to the holder 30 via a yoke member 63. A first fulcrum portion (not shown) of the gimbal mechanism 4 is formed at a diagonal position in the first axis R1 direction of the holder 30. The optical module 2 includes a rectangular housing 20, a substrate 25 disposed at an end of the housing 20 in the-Z direction, and a tube 26 protruding from the housing 20 in the + Z direction when viewed from the optical axis L direction. The optical module 2 is a camera module including a lens group (optical element) held by the cylindrical portion 26, a lens driving mechanism (not shown) disposed inside the housing 20, and an imaging element.
As shown in fig. 11 and 13, the fixed body 105 includes a case 150, a first cover 110 and a second cover 120 fixed to the case 150, and a wiring cover 130. As in embodiment 1, the case 150 is made of resin, and the first cover 110, the second cover 120, and the wiring cover 130 are made of nonmagnetic metal. The elastic engaging portions 58 are provided on the outer peripheral edges of the first cover 110 and the second cover 120. Further, a claw portion 59 is provided on the outer peripheral surface of the housing 150. The elastic engaging portion 58 engages with the claw portion 59.
The case 150 includes an outer frame 150A surrounding the outer periphery of the movable body 3, a wiring housing portion 150B protruding in the + Y direction from a portion on the-Z direction side of the outer frame 150A, and a protruding portion 150C protruding inward from an end portion on the-Z direction side (image side) of the outer frame 150A. The first cover 110 is fixed to the end of the outer frame 150A in the + Z direction. The wire cover 130 is fixed to the end of the wire housing portion 150B in the + Z direction.
As shown in fig. 11, the second cover 120 includes a bottom cover 120A fixed to an end of the case 150 in the-Z direction, and a seal cover 120B closing an octagonal inner opening 121 formed in the bottom cover 120A. The bottom cover 120A includes a first cover portion 122 fixed to an end of the outer frame 150A in the-Z direction and a second cover portion 123 fixed to an end of the wire housing portion 150B in the-Z direction. A first side plate portion 124 standing in the + Z direction is formed at the + Y direction edge of the second cover portion 123. Further, a second side plate portion 125 rising in the + Z direction is formed at the edge of the second cover portion 123 in the-X direction.
As shown in fig. 12, the outer frame 150A of the housing 150 includes a first frame 551 and a second frame 552 extending in parallel to the Y axis direction on the + X direction side and the-X direction side of the movable body 3, and a third frame 553 and a fourth frame 554 extending in parallel to the X axis direction on the + Y direction side and the-Y direction side of the movable body 3. The wiring storage portion 150B includes a fifth frame portion 55 and a sixth frame portion 56 extending from the end portions of the first frame portion 551 and the second frame portion 552 in the-Z direction in parallel to the + Y direction, and an upper plate portion 557 (see fig. 13) connected to the end portions of the fifth frame portion 55 and the sixth frame portion 56 in the + Z direction and covering the first flexible printed circuit board 7.
As shown in fig. 11, in embodiment 2, second flexible printed circuit board 8 is passed along the side surface in the-Y direction and the outer peripheral surface in the-X direction of outer frame portion 150A of fixed body 105. As shown in fig. 13, the coil 62X of the first magnetic drive mechanism 6X and the coil (not shown) of the second magnetic drive mechanism are held on the second flexible printed circuit board 8. The magnetic plate 64 and the magnetic sensor 65 are fixed to the second flexible printed circuit board 8. The second flexible printed circuit board 8 is connected to a terminal portion disposed on the upper surface of the wiring container 150B. The first flexible printed circuit board 7 according to embodiment 2 is drawn out from the movable body 3 in the + Y direction, is bent in a U-shape a plurality of times inside the wiring storage portion 150B through the notch portion 558 formed in the third frame portion 53 of the housing 150, is fixed to the upper plate portion 557 of the wiring storage portion 150B, and is then drawn out from the wiring storage portion 150B in the-Z direction.
As shown in fig. 12, the case 150 of embodiment 2 is provided with a through portion 559 that penetrates through the outer frame portion 150A in the Z-axis direction (optical axis L direction) at a diagonal position in the second axis line R2 direction. The second fulcrum portion 42 of the gimbal mechanism 4 is disposed in the through portion 559. In embodiment 2, the second supporting point portion 42 is disposed at each of two positions, i.e., inside the corner portion where the first frame portion 551 and the fourth frame portion 554 are connected to each other and inside the corner portion where the second frame portion 552 and the third frame portion 53 are connected to each other. The second fulcrum portion 42 includes a recess (not shown) recessed radially outward and a second thrust receiving member (not shown) disposed in the recess. The second thrust receiving member and the recess have the same configuration as in embodiment 1.
(bottom shape of case)
As shown in fig. 12 and 13, the case 150 includes an extension portion 150C extending inward from an end portion of the outer frame portion 150A on the-Z direction side (image side). A substantially rectangular opening 150D is formed on the inner peripheral side of the extension 150C. The protruding portion 150C includes a stopper portion 155 that overlaps the holder 30 when viewed from the optical axis L direction. Since the housing 150 includes the stopper 155 as in embodiment 1, the movable body 3 is restricted from flying out of the housing 150 in the-Z direction.
As shown in fig. 12, a notch portion 156 recessed toward the outer peripheral side is formed on the inner peripheral edge of the extension portion 150C. In embodiment 2, the edge of the extending portion 150C located in the + X direction of the opening 150D and the edge of the extending portion 150C located in the-X direction of the opening 150D are formed with the notch portions 156 at two locations, respectively. Similarly to embodiment 1, when the optical module 2 is inserted into the holder 30 disposed inside the housing 150 from the side of the protruding portion 150C, a positioning projection (not shown) formed on the optical module 2 passes through the cutout portion 156.
The opening 150D of the case 150 is closed by the second cover 120 fixed to the end of the case 150 in the-Z direction. As described above, the second cover 120 is composed of two members, the bottom cover 120A and the seal cover 120B. The bottom cover 120A is locked to the housing 150 by a locking structure formed by the elastic engagement portion 58 provided on the outer peripheral edge and the claw portion 59 of the housing 150, and is fixed to the housing 150 by an adhesive. The seal cover 120B is fixed to the bottom cover 120A by adhesion. The seal cover 120B may be fixed to the bottom cover 120A by welding.
By bonding the second cover 120 to the housing 150, the protruding portion 150C of the housing 150 is reinforced by the second cover 52. Therefore, when the movable body 3 collides with the stopper portion 155 due to an impact or the like at the time of dropping, the stopper portion 155 is bent and the protruding portion 150C is damaged.
(shape of end face of case)
In embodiment 2, the end of the case 150 bonded to the bottom cover 120A in the-Z direction is a surface having a step. The end of the housing 150 in the-Z direction includes a flat housing end surface 550 facing the first cover 110 in the Z-axis direction (optical axis L direction) and a rectangular projection 600 projecting from the housing end surface 550 in the-Z direction. The convex portion 600 is formed at one location at the end of the first frame 551 of the housing 150 in the-Z direction. In addition, the convex portions 600 are formed at two locations at the end portions of the second frame portion 552 of the case 150 in the-Z direction, and the convex portions 600 are formed at two locations at the end portions of the fourth frame portion 54 of the case 150 in the-Z direction. The five protrusions 600 have the same shape, and the protrusion dimension from the case end surface 550 is constant. All of the five protrusions 600 extend to the outer peripheral edge of the case end surface 550.
When the bottom cover 120A is adhered by applying an adhesive to the-Z-direction end of the case 150, the first cover portion 122 of the bottom cover 120A abuts on the tip of the projection 600. Thus, as shown in the enlarged view of fig. 13, since a gap is secured between the case end surface 550 and the first cover portion 122 at a position recessed by one step with respect to the convex portion 600, the adhesive layer 127 can be formed between the case end surface 550 and the first cover portion 122. In addition, an adhesive is also applied to the distal end surface of the projection 600 in the bonding step. Therefore, a thin adhesive layer (not shown) is formed between the distal end surface of the projection 600 and the first cover portion 122. Further, the front end surface of the convex portion 600 and the first cover portion 122 may be brought into contact with each other without applying an adhesive to the front end surface of the convex portion 600.
The case end surface 550 is formed with circular recesses 601 recessed in the + Z direction at a plurality of locations. The recesses 601 are formed at one position at each diagonal position in the first axis R1 direction of the case end surface 550. The through portion 559 is opened at a diagonal position in the direction of the second axis line R2 of the case end surface 550, and a recess 601 is formed at one location between each through portion 59 and each projection 600 adjacent in the X-axis direction or the Y-axis direction. Therefore, when a large amount of adhesive is excessively applied around the through portion 559, the excess adhesive is stored in the recess 601.
As shown in fig. 11, the bottom cover 120A includes an inner opening 121 formed in the first cover portion 122 fixed to the case end surface 550, and an adhesive leakage preventing wall 126 rising from the edge of the inner opening 121 in the + Z direction. In embodiment 2, an adhesive leakage preventing wall 126 is formed along the entire periphery of the edge of the inner opening 121. The protruding dimension of the adhesive leakage preventing wall 126 from the case end surface 550 is larger than the protruding dimension of the projection 600. The inner opening 121 is disposed on the inner peripheral side of the opening 150D of the housing 150 when viewed from the direction of the optical axis L. Therefore, when the bottom cover 120A is fixed to the case end surface 550, the adhesive leakage preventing wall 126 is inserted to the inner peripheral side of the extension portion 150C of the case. Thus, as shown in the enlarged view of fig. 13, the adhesive leakage preventing wall 126 is disposed on the housing end surface 550 and on the inner peripheral side of the first cover portion 122.
(main effects of embodiment 2)
As described above, in the optical unit 100 with shake correction function according to embodiment 2, the fixed body 105 includes the case 150 and the second cover 120, the case 150 includes the outer frame portion 150A surrounding the outer periphery of the movable body 3 and the protruding portion 150C protruding from the end portion on the image side in the optical axis L direction of the outer frame portion 150A to the inner periphery, and the second cover 120 is fixed to the case 150 from the image side in the optical axis L direction to close the opening 150D provided on the inner periphery of the protruding portion 150C. The protruding portion 150C includes a stopper portion 155 that overlaps the movable body 3 when viewed from the optical axis L direction, and a region including at least the stopper portion 155 is bonded to the second cover 120. Therefore, as in embodiment 1, since the stopper 155 can be reinforced, the risk of damage to the stopper 150 due to impact caused by dropping or the like can be reduced, and the risk of damage to the protruding portion 155C can be reduced. Therefore, the impact resistance of the optical unit 100 with a shake correction function can be improved.
In addition, as in embodiment 1, since the entire region of the extension portion 150C is bonded to the second cover 120, the entire extension portion 150C is reinforced, and the entire bottom surface of the case 150 is reinforced by the second cover 120. Therefore, the impact resistance of the optical unit 100 with shake correction function can be further improved as compared with the case where only the stopper 155 is bonded to the second cover 120.
In embodiment 2, the outer frame portion 150A of the housing 150 includes a housing end surface 550 facing the second cover 120 in the direction of the optical axis L and a projection 600 projecting from the housing end surface 550, and the second cover 120 is fixed to the housing 150 by an adhesive layer 127 formed between the housing end surface 500 and the second cover 120. In embodiment 2, by providing the second cover 120 with the projection 600, an appropriate gap can be ensured between the case end surface 550 and the second cover 120. Therefore, the adhesive layer 127 can be formed between the case end surface 550 and the second cover 120, and the adhesive area can be ensured.
In embodiment 1, since the portion where the case 150 and the second cover 120 are bonded is configured to bond the flat surfaces to each other, if one of the components is warped, a portion where the gap is too large and the adhesive layer cannot be formed may be generated. As a result, only a part of the range to be bonded may be bonded, and thus, rigidity may not be ensured. In embodiment 2, since the case end surface 550 is formed in advance with the projection 600 in a stepped shape, even when one of the case 150 and the bottom cover 120A, which is a component of the second cover 120, is warped, the gap can be suppressed from becoming excessively large. Therefore, there is little risk that the bonding area cannot be ensured, and thus there is little risk that the rigidity cannot be ensured. Therefore, the impact resistance of the optical unit 100 with a shake correction function can be improved.
In embodiment 2, since the projection 600 extends to the outer peripheral edge of the case end surface 550, the structure of the mold used when the projection 600 is formed on the case end surface 550 can be simplified. Further, the convex portion 600 may be extended to the inner peripheral edge of the case end surface 550.
The second cover 120 of embodiment 2 includes a bottom cover 120A bonded to the case end surface 550 and a seal cover 120B closing the inner opening 121 formed in the bottom cover 120A. The inner opening 121 is disposed on the inner peripheral side of the opening 150D when viewed in the direction of the optical axis L, and the bottom cover 120A includes an adhesive leakage preventing wall 126 rising from the edge of the inner opening 121 toward the case 150. Therefore, when the adhesive applied between case 150 and bottom cover 120A overflows from the edge of opening 150D of case 150, leakage of the adhesive can be restricted. Therefore, even if a large amount of adhesive is applied to secure the bonding area, leakage of the adhesive can be suppressed.
The housing 150 of embodiment 2 includes a first frame portion 51 and a second frame portion 552 facing each other in an X-axis direction (first direction) orthogonal to the optical axis L through the movable body 3, and a third frame portion 553 and a fourth frame portion 554 facing each other in a Y-axis direction (second direction) orthogonal to the optical axis L and the X-axis direction (first direction) through the movable body 3. The third frame portion 53 includes a notch portion 558 penetrating the first flexible printed circuit board 7 connected to the movable body 3, and the convex portion 600 is provided at least one portion on each of three sides of the first frame portion 551, the second frame portion 552, and the fourth frame portion 54. In embodiment 2, the number of the convex portions 600 provided on each side is 1 or 2, but may be 3 or more. By forming the convex portions on all three sides surrounding opening 150D of case 150 in this manner, it is possible to reduce the risk that the gap between case end surface 550 and second cover 120 becomes large and the adhesive layer cannot be formed in all three sides. Therefore, there is little risk that the bonding area cannot be secured, and thus there is little risk that the rigidity cannot be secured.
The case 150 of embodiment 2 includes a through portion 559 that penetrates a diagonal position in the direction of the second axis R2 in the direction of the optical axis L, and the case end face 550 includes a recess 601 located between the through portion 559 and the projection 600. Therefore, when the adhesive is excessively applied between the through portion 559 and the convex portion 600, the excess adhesive can be accommodated in the concave portion 601. Therefore, the adhesive can be prevented from leaking from the through portion 559, and therefore, the adhesive can be prevented from adhering to the second fulcrum portion 42 disposed in the through portion 559 and interfering with the operation of the gimbal mechanism 4.

Claims (12)

1. An optical unit with a shake correction function, comprising:
a movable body;
a swing support mechanism that supports the movable body swingably about a first axis that intersects an optical axis, and supports the movable body swingably about a second axis that intersects the optical axis and the first axis;
a fixed body that supports the movable body via the swing support mechanism;
a shake correction drive mechanism that swings the movable body about the first axis and about the second axis,
the fixing body includes:
a housing including an outer frame portion surrounding an outer peripheral side of the movable body and an extension portion extending from an end portion on an image side in the optical axis direction of the outer frame portion to an inner peripheral side;
a cover fixed to the housing from an image side in the optical axis direction and closing an opening provided on an inner peripheral side of the protruding portion,
the protruding portion includes a stopper portion that overlaps the movable body when viewed from the optical axis direction,
the region of the extension including at least the stop portion is bonded to the cover.
2. The optical unit with shake correcting function according to claim 1,
the entire area of the protruding portion is bonded to the cover.
3. The optical unit with shake correcting function according to claim 1,
the cover has a thickness in the optical axis direction smaller than a thickness of the protruding portion in the optical axis direction.
4. The optical unit with shake correcting function according to claim 3,
the shell is a resin part, and the shell is made of resin,
the cover is a metal part.
5. The optical unit with shake correcting function according to claim 4,
the swing support mechanism includes a gimbal frame connecting the movable body and the fixed body,
a second fulcrum portion that comes into point contact with the gimbal frame is provided at a diagonal position in the second axial direction of the housing,
the drive mechanism for correcting shaking includes: a coil disposed in a coil disposition hole provided on the case; and a magnet fixed to the movable body.
6. The optical unit with shake correcting function according to claim 1,
the movable body includes: an optical module; a holder surrounding an outer peripheral side of the optical module,
a protruding portion protruding to an outer peripheral side is provided on the optical module,
the holder includes a stopper portion against which the protruding portion abuts from an image side in the optical axis direction,
the housing includes a notch portion formed by cutting the inner peripheral edge of the extension portion toward the outer peripheral side,
the protruding portion and the stopper portion are located inside the notch portion when viewed from the optical axis direction.
7. The optical unit with shake correcting function according to claim 6,
a concave portion recessed toward the subject side in the optical axis direction is provided on an inner peripheral edge of the holder,
the concave portion is located inside the notch portion when viewed from the optical axis direction, the stopper portion is a bottom surface of the concave portion,
the recess is an adhesive pool that configures an adhesive that secures the optical module to the holder.
8. The optical unit with shake correcting function according to any one of claims 1 to 7,
the housing includes a housing end surface opposed to the cover in the optical axis direction and a convex portion protruding from the housing end surface,
the cover is fixed to the housing by an adhesive layer formed between the housing end face and the cover.
9. An optical unit with a shake correcting function according to claim 8,
the projection extends to an edge of the end face of the housing.
10. An optical unit with a shake correcting function according to claim 8,
the cover includes: a bottom cover fixed to the end surface of the housing; a sealing cover for sealing the inner opening formed on the bottom cover,
the inner opening is disposed on an inner peripheral side of the opening when viewed from the optical axis direction,
the bottom cover includes an adhesive leakage preventing wall rising from an edge of the inner opening toward the housing.
11. An optical unit with a shake correcting function according to claim 8,
the housing includes: a first frame portion and a second frame portion facing each other in a first direction orthogonal to the optical axis with the movable body interposed therebetween, a third frame portion and a fourth frame portion facing each other in a second direction orthogonal to the optical axis and orthogonal to the first direction with the movable body interposed therebetween,
the third frame portion includes a cutout portion through which a flexible printed circuit board connected to the movable body passes,
the convex portion is provided at least at one portion in each of the first frame portion, the second frame portion, and the fourth frame portion.
12. An optical unit with a shake correcting function according to claim 8,
the housing includes a through portion that penetrates a diagonal position in the second axial direction in the optical axis direction,
the case end surface includes a concave portion between the through portion and the convex portion.
CN202010217846.6A 2019-03-28 2020-03-25 Optical unit with shake correction function Active CN111752066B (en)

Applications Claiming Priority (12)

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JP2019062236A JP7237685B2 (en) 2019-03-28 2019-03-28 Optical unit with anti-shake function
JP2019062237A JP7235558B2 (en) 2019-03-28 2019-03-28 Optical unit with anti-shake function
JP2019-062236 2019-03-28
JP2019062239A JP7237686B2 (en) 2019-03-28 2019-03-28 Optical unit with anti-shake function
JP2019-062238 2019-03-28
JP2019062238A JP7290444B2 (en) 2019-03-28 2019-03-28 Optical unit with anti-shake function
JP2019-062237 2019-03-28
JP2019-062239 2019-03-28
JP2019187557 2019-10-11
JP2019-187557 2019-10-11
JP2019-219453 2019-12-04
JP2019219453A JP7344780B2 (en) 2019-10-11 2019-12-04 Optical unit with shake correction function

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