CN116256927A - Optical component driving device, optical device, and electronic apparatus - Google Patents
Optical component driving device, optical device, and electronic apparatus Download PDFInfo
- Publication number
- CN116256927A CN116256927A CN202210359808.3A CN202210359808A CN116256927A CN 116256927 A CN116256927 A CN 116256927A CN 202210359808 A CN202210359808 A CN 202210359808A CN 116256927 A CN116256927 A CN 116256927A
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- Prior art keywords
- support
- guide
- optical
- shape
- metal
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
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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
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adjustment Of Camera Lenses (AREA)
- Studio Devices (AREA)
- Lens Barrels (AREA)
Abstract
The invention provides an optical component driving device, a photographic device and an electronic device, wherein the friction coefficient of a guide mechanism is not easy to be increased. An optical component driving device (10) has a guide mechanism (34) for guiding movement of an optical component, the guide mechanism (34) has support parts (40, 44) formed as protrusions on a (1) th component (22), guide parts (42, 46) formed as grooves on a 2 nd component (24, 16), the support parts (40, 44) are embedded in the guide parts (42, 46), the support parts (40, 44) and the guide parts (42, 46) slide, and one of the support parts (40, 44) and sliding parts of the guide parts (42, 46) is composed of metal (98, 100), and the other is composed of resin.
Description
Technical Field
The invention relates to an optical component driving device, an optical device, and an electronic apparatus.
Background
A small camera device is mounted on an electronic device such as a mobile phone or a smart phone. Such a small camera is known to have a lens driving device having a shake compensation function as shown in patent document 1.
[ Prior Art literature ]
[ patent literature ]
JP 2009-217051A (patent document 1).
Disclosure of Invention
[ problem to be solved by the invention ]
In the patent document 1, a guide mechanism intended to freely move the lens has been provided, the guide mechanism including a plurality of protrusions that are in sliding contact with a guide surface of a guide recess.
However, there is a problem in that the coefficient of friction between the projection of such a guide mechanism and the guide surface becomes large.
The present invention is to solve the above-described conventional problems and to provide an optical component driving device, a camera device, and an electronic apparatus in which the coefficient of friction of a guide mechanism is not easily increased.
[ technical solution ]
One aspect of the present invention is an optical component driving apparatus having a guide mechanism for guiding movement of an optical component, the guide mechanism having a support portion formed as a protrusion on a 1 st member and a guide portion formed as a groove on a 2 nd member, the support portion being fitted into the guide portion, the support portion sliding along the guide portion, one side of a sliding portion of the support portion and the guide portion being made of metal, and the other side being made of resin.
Preferably, the metal is a metal member constituting a bottom surface of the groove, and is embedded in the 2 nd member formed of resin.
Preferably, the metal member is formed in a plate shape, has a V-shape or a U-shape in a cross section in a direction orthogonal to a moving direction of a portion constituting the bottom surface of the groove, and is formed in a linear shape parallel to a plate surface of the plate shape.
Preferably, the metal member has a rectangular shape, and the V-shaped or U-shaped portion is provided at both ends of one of two sides facing each other, and the linear portion is provided at both ends of the other side.
Preferably, a cross section of a direction orthogonal to the moving direction of the support portion is semicircular or semi-elliptical.
Preferably, there are one 1 st member and 2 nd members, the one 1 st member having the support portions on both sides in an optical axis direction of the optical member, the two 2 nd members sandwiching the 1 st member from both sides in the optical axis direction, and having a support body on one side thereof intended to support the optical member, directions of grooves of the guide portions provided on the two 2 nd members being orthogonal.
Another aspect of the present invention is a photographic apparatus having the optical component driving apparatus of the aspect, and a lens as the optical component.
Another aspect of the present invention is a photographic apparatus having the optical component driving apparatus of the aspect, an image sensor as the optical component.
Other aspects of the invention are electronic devices having the camera device of the aspects.
[ Effect of the invention ]
According to the present invention, the guide mechanism has a support portion formed as a protrusion on the 1 st member and a guide portion formed as a groove on the 2 nd member, the support portion being fitted into the guide portion, and the support portion sliding along the guide portion. One of the sliding portions of the support portion and the guide portion is made of metal, and the other is made of resin. For this reason, the friction coefficient is kept small by the contact of the metal and the resin. Thus, an optical component driving device, a camera device, and an electronic apparatus in which the friction coefficient of the guide mechanism is not easily increased can be provided.
Drawings
Fig. 1 is a perspective view of a lens driving device according to an embodiment of the present invention, as viewed from obliquely above.
Fig. 2 is a perspective view of a lens device according to an embodiment of the present invention as seen obliquely from below.
Fig. 3 is an exploded perspective view of the lens driving device according to the embodiment of the present invention, when the fixed body and the movable body are detached, from the obliquely upward direction.
Fig. 4 is an exploded perspective view of the lens driving device according to the embodiment of the present invention, as viewed from above obliquely after all components are removed.
Fig. 5 is an exploded perspective view of the lens driving device according to the embodiment of the present invention, as seen obliquely from below, after all the components are removed.
Fig. 6 (a) is an exploded perspective view of the 2 nd movable body plate and the metal member embedded therein, and fig. 6 (B) is a perspective view showing a state in which the metal member is embedded in the 2 nd movable body plate.
Fig. 7 (a) is an exploded perspective view of the lens support and the metal member embedded therein, and fig. 7 (B) is a view showing embedding of the metal member into the lens support.
Fig. 8 is a plan view of the mobile body 14 of fig. 3 when viewed from above.
Fig. 9 (a) is a sectional view taken along line IXA-IXA of fig. 8, fig. 9 (B) is a sectional view taken along line IXB-IXB of fig. 8, fig. 9 (C) is a sectional view taken along line IXC-IXC of fig. 8, and fig. 9 (D) is a sectional view taken along line IXD-IXD of fig. 8.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In fig. 1 to 5, a lens driving apparatus 10 according to an embodiment of the present invention is shown. The lens driving device 10 is used together with a lens in a camera device mounted on an electronic device such as a smart phone.
The lens driving device 10 includes a fixed body 12 and a movable body 14 supported so as to be movable relative to the fixed body 12. As shown in fig. 4 and 5, the movable body 14 includes a lens support 16 for supporting a lens, not shown, and a 1 st frame 18 surrounding the lens support 16. The lens support 16 and the 1 st frame 18 have a substantially rectangular outer shape when viewed from above.
In the specification, for convenience, the optical axis direction of the lens is the Z direction, the direction orthogonal to the optical axis direction is the X direction, and the direction orthogonal to the Z direction and the X direction is the Y direction. The object side of the optical axis is the upper side, and the side on which an image sensor, not shown, is disposed on the opposite side is the lower side.
A lens mounting hole 20 having a circular shape as viewed in the Z direction is formed inside the lens support 16, and a lens is mounted in the lens mounting hole 20.
The 1 st frame 18 is composed of a 1 st moving body plate 22, a 2 nd moving body plate 24, and a 1 st cover 26. The lens support 16, the 1 st movable body plate 22, and the 2 nd movable body plate 24 are made of engineering plastics such as Liquid Crystal Polymer (LCP), polyacetal, polyamide, polycarbonate, modified polyphenylene ether, and polybutylene terephthalate. Also, the 1 st cover 26 is made of, for example, metal. The 1 st movable body plate 22, the 2 nd movable body plate 24, and the 1 st cover 26 are formed with through holes 28,30, and 32, respectively, through which light passes. The through holes 28,30,32 are each formed in a generally circular shape.
The 1 st frame 18 supports the lens support 16 to be movable in the Y direction and the X direction. That is, the 1 st frame 18 has an orthogonal direction support mechanism 34, and the lens support 16 is freely movable in the XY direction by the orthogonal direction support mechanism 34.
The orthogonal direction support mechanism 34 is constituted by a 1 st support mechanism 36 and a 2 nd support mechanism 38 spaced apart in the Z direction. The 1 st support mechanism 36 is provided below the Z direction, and is constituted by a 1 st support portion 40 formed as a protrusion protruding in the-Z direction on the lower surface of the 1 st movable body plate 22, and a 1 st guide portion 42 formed as a groove recessed in the-Z direction on the upper surface of the 2 nd movable body plate 24. The 1 st support portion 40 is fitted into the 1 st guide portion 42. The 1 st support portion 40 and the 1 st guide portion 42 extend in the X direction and are formed near the four corners of the 1 st movable body plate 22 and the 2 nd movable body plate 24. Since the 1 st support portion 40 and the 1 st guide portion 42 extending in the X direction are fitted to restrict movement in the Y direction, the 1 st movable body plate 22 is free to move relative to the 2 nd movable body plate 24 only in the X direction.
The 1 st support mechanism 36 has a 1 st support portion 40 and a 1 st guide portion 42 arranged at each corner of the 1 st moving body plate 22 and the 2 nd moving body plate 24 in a rectangular shape. The bottom surface of the 1 st guide portion 42A on the-Y side where the 1 st magnet 54 and the magnetic member 86 are provided is V-shaped, and the bottom surface of the 1 st guide portion 42B on the opposite side +y side is flat. The corresponding 1 st support portion 40A is identical in shape to the 1 st support portion 40B.
The 1 st support portion 40 is made of resin. The 1 st guide 42 is made of resin, but the bottom surface of the groove in which the 1 st support 40 slides is made of metal. Specifically, as shown in fig. 6 (a) and 6 (B), the 2 nd movable body plate 24 is insert molded with a plate-like metal member 98 having a through hole in the center, and has a shape substantially identical to or slightly smaller than the outer shape of the 2 nd movable body plate 24. The metal member 98 is almost entirely embedded in the body of the 2 nd movable body plate 24 except for the bottom surface constituting the 1 st guide portion 42, but is exposed as the bottom surface in the groove in the 1 st guide portion 42. The metal member 98 is insert-molded in a state in which the 1 st exposed portion 98A in a V shape and the 1 st exposed portion 98B in a planar shape are formed in advance.
As shown in fig. 9 (a) and 9 (B), the 1 st exposed portion 98A of the V-shaped metal member 98 of the 1 st guide portion 42A is exposed to form a bottom surface when viewed in the X direction. Further, the 1 st support portion 40A is semicircular. Thus, the arc-shaped curved surface portion of the 1 st support portion 40A and the V-shaped flat surface portion of the 1 st exposed portion 98A are in line contact with each other at two places. In other words, in a section in the Y-Z plane, two points are in contact.
The cross-sectional shape of the 1 st support portion 40A is preferably a shape in which the corner portion is not in contact with the bottom surface, and may be, for example, a semi-elliptical shape. The 1 st exposed portion 98A has a V-shaped cross section, but may have a U-shape. By the two-point line contact, the position of the 1 st support portion 40A with respect to the 1 st exposed portion 98A in the Y direction is determined without shaking.
Similarly, as shown in fig. 9 (a) and 9 (B), the 1 st exposed portion 98B of the metal member 98 having a planar portion extending in the X-Y plane of the 1 st guide portion 42B is exposed as viewed in the X direction, and forms a bottom surface.
The cross-sectional shape of the 1 st support portion 40B is preferably a shape in which the corner portion is not in contact with the bottom surface, and may be, for example, a semi-elliptical shape. In the present embodiment, the same shape as the 1 st support portion 40A. Thus, the height of the 1 st moving body plate with respect to the 2 nd moving body plate 24 in the Z direction can be determined. The width of the 1 st guide 42B in the Y direction is larger than the width of the 1 st support 40B in the Y direction. For this reason, even if the size between the 1 st support portion 40A and the 1 st support portion 40B is different from the size between the 1 st guide portion 42A and the 1 st guide portion 42B within a tolerance range, assembly can be performed. Accordingly, the friction between the metal and the resin can be kept small, and therefore, the friction coefficient of the 1 st support mechanism 36 is difficult to be increased.
The 2 nd support mechanism 38 is provided above the Z direction, and includes a 2 nd support portion 44 formed as a protrusion protruding in the +z direction on the upper surface of the 1 st moving plate 22, and a 2 nd guide portion 46 formed as a groove recessed in the +z direction on the lower surface of the lens support 16. The 2 nd support 44 is embedded in the 2 nd guide 46. The 2 nd support portion 44 and the 2 nd guide portion 46 extend in the Y direction and are formed near the four corners of the lens support 16 and the 1 st movable body plate 22. Since the 2 nd support portion 44 and the 2 nd guide portion 46 extending in the Y direction are fitted to restrict movement in the X direction, the lens support 16 is free to move relative to the 1 st movable body plate 22 only in the Y direction.
The 2 nd support portion 44 and the 2 nd guide portion 46 are disposed at each corner of the quadrangular 1 st movable body plate 22 and the lens support 16. The bottom surface of the 2 nd guide 46A on the +x side, on which the 1 st magnet 54 and the magnetic member 86 are provided, is V-shaped, and the bottom surface of the 2 nd guide 46B on the opposite-X side is flat. The corresponding 2 nd support portion 44A is identical in shape to the 2 nd support portion 44B.
The 2 nd support portion 44 is made of resin. The 2 nd guide 46 is made of resin, but the bottom surface of the groove in which the 2 nd support 44 slides is made of metal. Specifically, as shown in fig. 7 (a) and 7 (B), the lens support 16 is insert molded with a plate-like metal member 100 having a through hole in the center, and has a shape substantially identical to or slightly smaller than the outer shape of the lens support 16. The metal member 100 is almost entirely embedded in the lens support body 16 body except for the bottom surface constituting the 2 nd guide 46, but is exposed as a bottom surface in the groove in the 2 nd guide 46. The metal member 100 is insert molded in a state where the V-shaped 2 nd exposed portion 100A and the planar 2 nd exposed portion 100B are formed in advance.
As shown in fig. 9 (C) and 9 (D), the 2 nd exposed portion 100A of the V-shaped metal member 100 of the 2 nd guide portion 46A is exposed to form a bottom surface when viewed in the Y direction. Further, the 2 nd support portion 44A is semicircular. Thereby, the arc-shaped curved surface portion of the 2 nd support portion 44A and the V-shaped linear plane portion of the 2 nd exposed portion 100A are in line contact with each other at two places. In other words, in a cross section in the X-Z plane, two points are in contact.
The cross-sectional shape of the 2 nd support portion 44A is preferably a shape in which the corner portion is not in contact with the bottom surface, and may be, for example, a semi-elliptical shape. The cross-sectional shape of the 2 nd exposure portion 100A is V-shaped, but may be U-shaped. The position of the 2 nd exposure portion 100A in the X direction with respect to the 2 nd support portion 44A is determined without shaking by two line contacts.
Similarly, as shown in fig. 9 (C) and 9 (D), the 2 nd exposed portion 100B of the metal member 100 having a planar portion extending in the X-Y plane of the 2 nd guide 46B is exposed as viewed in the Y direction, and forms a bottom surface.
The cross-sectional shape of the 2 nd support portion 44B is preferably a shape in which the corner portion is not in contact with the bottom surface, and may be, for example, a semi-elliptical shape. In the present embodiment, the same shape as the 2 nd support portion 44A. Thus, the height of the lens support 16 in the Z direction with respect to the 1 st movable body plate 22 can be determined. The width of the 2 nd guide portion 46B in the X direction is larger than the width of the 2 nd support portion 44B in the X direction. For this reason, even if the size between the 2 nd support portion 44A and the 2 nd support portion 44B is different from the size between the 2 nd guide portion 46A and the 2 nd guide portion 46B within a tolerance range, assembly can be performed. Thus, the friction between the metal and the resin can be kept small, and therefore, the friction coefficient of the 2 nd support mechanism 38 is difficult to be large.
Further, the metal members 98, 100 are formed of a non-magnetic metal such as stainless steel. Further, the surface roughness may be reduced by performing a polishing mirror surface treatment and a chemical polishing treatment on the surfaces of the 1 st exposed portions 98A and 98B and the 2 nd exposed portions 100A and 100B, thereby reducing the friction coefficient. Further, a lubricant may be provided between the 1 st support portion 40 and the 1 st guide portion 42 and between the 2 nd support portion 44 and the 2 nd guide portion 46.
The following description may be made with respect to the structures of the 1 st support mechanism 36 and the 2 nd support mechanism 38 of the orthogonal direction support mechanism 34. The 1 st support mechanism 36 has a 1 st support portion 40 formed as a protrusion on the 1 st movable body plate 22 as the 1 st member, and a 1 st guide portion 42 formed as a groove on the 2 nd movable body plate 24 as the 2 nd member. The 1 st support portion 40 is fitted into the 1 st guide portion 42, and the 1 st support portion 40 and the 1 st guide portion 42 slide. The bottom surface of the 1 st guide 42, which is one of the sliding portions of the 1 st support 40 and the 1 st guide 42, is made of metal, and the other 1 st support 40 is made of resin.
The 2 nd support mechanism 38 includes a 2 nd support portion 44 formed as a protrusion on the 1 st movable body plate 22 as the 1 st member, and a 2 nd guide portion 46 formed as a groove on the lens support 16 as the 2 nd member. The 2 nd support portion 44 is fitted into the 2 nd guide portion 46, and the 2 nd support portion 44 and the 2 nd guide portion 46 slide. The bottom surface of the 2 nd guide 46, which is one of the sliding portions of the 2 nd support 44 and the 2 nd guide 46, is made of metal, and the other 2 nd support 44 is made of resin.
In the orthogonal direction support mechanism 34, the 1 st member, i.e., the 1 st movable body plate 22, has a 1 st support portion 40 and a 2 nd support portion 44 on both sides in the optical axis direction of the optical member, i.e., the lens. The 2 nd member, i.e., the 2 nd movable body plate 24 and the lens support 16 sandwich the 1 st movable body plate 22 from both sides in the optical axis direction, but one side of the two 2 nd members is the lens support 16 intended to support the lens. The grooves of the 1 st guide 42 and the 2 nd guide 46 provided in the two 2 nd members are perpendicular to each other.
Mounting portions 48 are provided at four corners of the 1 st cover 26, and extend downward in the Z direction. The mounting portion 48 is formed with a rectangular mounting hole 50. Further, the mounted parts 52 are formed at four corners of the 2 nd movable body plate 24 so as to protrude laterally. The attached portion 52 is fitted into the attachment hole 50, and the 1 st cover 26 is fixed to the 2 nd movable body plate 24.
The 1 st magnet 54 and the 1 st yoke 56 are fixed to the +x-direction surface and the-Y-direction surface on the outer side of the lens support 16. The 1 st magnet 54 of the +x direction surface forms an S stage and an N stage in the X direction. The 1 st magnet 54 of the-Y direction surface forms the S-stage and the N-stage in the Y direction.
Further, the 2 nd magnet 58 and the 2 nd yoke 60 are fixed to the +y direction surface of the 2 nd movable body plate 24. The 2 nd magnet 58 is divided into two parts in the Z direction, and is formed into S-stage and N-stage in the Y direction, respectively, with polarities thereof being opposite up and down. A magnetic member 86 is fixed to the bottom surface of the 2 nd movable body plate 24, and corresponds to the lower side of the 1 st magnet 54. Thus, the lens support 16 is attracted to the 2 nd movable body plate 24 together with the 1 st movable body plate 22, and the movable bodies 14 are unified as one member.
The relationship between the fixed body 12 and the movable body 14 will be described later. The fixed body 12 has a 2 nd frame body 62. The 2 nd frame 62 surrounds the 1 st frame 18 of the movable body 14. The 2 nd frame body 62 has a base 64 and a 2 nd cover 66 attached to the base 64. The base 64 and the 2 nd cover 66 are rectangular in shape when viewed from above, and the 2 nd cover 66 is fitted to the outside of the base 64 to constitute the 2 nd frame 62. Further, through holes 72,74 for passing or inserting light are formed in the bottom surface 68 of the base 64 and the upper surface 70 of the 2 nd cover 66.
In addition, at four corners of the base 64, pillar portions 76 are formed to stand upward from the bottom surface portion 68, and the corners are sandwiched and divided into two. In order to surround the pillar portion 76, the flexible print substrate 78 is disposed outside the base 64. The flexible printed board 78 is bent into a rectangular shape, fixed to the post 76, surrounds the outer shape of the base 64, and has a terminal portion 80 formed at the lower portion thereof. The terminal portion 80 restricts the current flow to the 1 st coil 82 and the 2 nd coil 84 described later, but is not limited thereto.
Inside the flexible print substrate 78, the 1 st coil 82 is fixed to the +x direction portion and the-Y direction portion. Further, the 2 nd coil 84 is fixed to the +y direction portion inside the flexible print substrate 78. The 1 st coil 82 faces the 1 st magnet 54. The 2 nd coil 84 faces the 2 nd magnet 58. A position detecting element 124 for detecting the position of the movable body 14 is provided in the 1 st coil 82.
In the embodiment, the coil and the position detecting element are provided on the fixed body 12 side and the magnet is provided on the movable body 14 side, but the magnet may be provided on the fixed body 12 side and the coil and the position detecting element may be provided on the movable body 14 side.
A magnetic member 86 made of a magnetic material is provided outside the +y direction portion of the flexible print substrate 78. The magnetic member 86 faces the 2 nd magnet 58 with the flexible printed board 78 and the 2 nd coil 84 interposed therebetween. Since the magnetic flux from the 2 nd magnet 58 flows through the magnetic member 86, attractive force is generated between the 2 nd magnet 58 and the magnetic member 86. Therefore, the attractive force acts in the +y direction along the fixed body 12 on the movable body 14.
The movable body 14 is supported by the optical axis direction support mechanism 88 so as to be movable in the Z direction with respect to the fixed body 12. The optical axis direction supporting mechanism 88 is constituted by a main guide shaft 90 provided on the base 64, a 2 nd guide shaft 92, and a guide hole 94 and a guide wall 96 provided on the moving body 14.
In this configuration, if the 1 st coil 82 is energized to face the 1 st magnet 54 on the X-direction surface, the 1 st coil 82 generates the lorentz force in the X-direction. Since the 1 st coil 82 is fixed to the base 64, the reaction force acting on the 1 st magnet 54 becomes a driving force with respect to the lens support 16 and the 1 st movable body plate 22, and the lens support 16 and the 1 st movable body plate 22 are supported by the 1 st support mechanism 36 to move in the X direction.
In the 1 st support mechanism 36, the 1 st exposed portions 98A and 98B of the metal member 98 exposed in the 1 st support portion 40 and the 1 st guide portion 42 slide. Since the 1 st support portion 40 is made of resin and the 1 st exposed portions 98A and 98B are made of metal, the friction coefficient can be kept small and the sliding can be performed smoothly.
If the 1 st coil 82 is energized to face the 1 st magnet 54 on the Y-direction surface, a lorentz force in the Y-direction is generated in the 1 st coil 82. Since the 1 st coil 82 is fixed to the base 64, the reaction force acting on the 1 st magnet 54 acts as a driving force for the lens support 16, and the lens support 16 is supported by the 2 nd support mechanism 38 to move in the Y direction.
In the 2 nd support mechanism 38, the 2 nd exposed portions 100A and 100B of the metal member 100 exposed in the 2 nd support portion 44 and the 2 nd guide portion 46 slide. The 2 nd support portion 44 is made of resin, and the 2 nd exposed portions 100A and 100B are made of metal, so that the friction coefficient can be kept small and the sliding can be performed smoothly.
After the lens support 16 is moved to at least one side in the X direction or the Y direction, if the energization of the 1 st coil 82 is stopped, the lens support 16 is stopped at a position where the energization is stopped by the attractive force between the 1 st magnet 54 and the magnetic member 86 and the friction between the 1 st support 40 and the 1 st guide 42 and between the 2 nd support 44 and the 2 nd guide 46.
In the above embodiment, the following example will be described, in which the 1 st support portion 40 and the 2 nd support portion 44 are provided on the 1 st movable body plate 22, the 1 st guide portion 42 is provided on the 2 nd movable body plate 24, and the 2 nd guide portion 46 is provided on the lens support body 16. The 1 st exposed portions 98A and 98B are exposed on the bottom surface of the 1 st guide portion 42, and the 2 nd exposed portions 100A and 100B are exposed on the bottom surface of the 2 nd guide portion 46. Since the sliding portion in the guide portion exposes the metal member, friction with the resin, i.e., the supporting portion, can be kept small, and friction force is also small, and sliding is performed smoothly with each other. According to this structure, the coefficient of friction is about 0.2 even when a lubricant is used during sliding between resins, whereas the coefficient of friction is about 0.1 during sliding between metal and resin. As a result, the friction force is reduced, and therefore, the driving force required is reduced as compared with a structure without resin and metal sliding surfaces, and the power consumed for driving can be reduced.
Instead of the protrusions and grooves, guide portions may be formed as grooves on the upper and lower surfaces of the 1 st movable body plate 22, the metal member may be embedded in the 1 st movable body plate 22, and exposed portions of the metal member may be formed in the guide portions. In contrast, a support portion may be formed as a protrusion between the 2 nd movable body plate 24 and the lens support 16. Furthermore, it is also possible to replace only the upper side or only the lower side.
In the above embodiment, the following example will be described in which the 1 st coil 82 and the 2 nd coil 84 are mounted on the fixed body 12, and the 1 st magnet 54 and the 2 nd magnet 58 are mounted on the movable body 14. However, the 1 st coil 82 and the 2 nd coil 84 may be attached to the movable body 14, and the 1 st magnet 54 and the 2 nd magnet 58 may be attached to the fixed body 12.
In the above embodiment, a case where a plate-like metal member exposed portion is formed in a guide portion will be described. However, the present invention is not limited to the above embodiment, and the guide portion may be formed of resin and the support portion may be formed of metal. For example, the support portion may be formed by embedding a metal shaft in the 1 st movable body plate 22. The guide portion and the support portion may be made of metal.
Further, although the lens driving device 10 for a photographic apparatus is described in the embodiment, the present invention can be applied to other apparatuses.
In the above-described embodiment, a description will be given of a case where a guide mechanism in which a metal member exposed portion is provided in a guide portion is applied to an orthogonal direction guide mechanism for shake compensation for moving a lens support in a direction orthogonal to an optical axis direction of a lens. However, the present invention is not limited to the above-described embodiment, and may be applied to an optical axis direction guide mechanism for autofocus, which supports the fixed body 12 and the movable body 14 that moves relative to the fixed body 12 in the optical axis direction of the lens. Further, the present invention can be applied to an orthogonal direction guide mechanism for compensating for shake in which an image sensor is used as an optical member and is moved in a direction orthogonal to an optical axis.
In this case, the guide mechanism forms a support portion on the 1 st member, which is one side of the fixed body 12 and the movable body 14, and a guide portion is provided on the 2 nd member, which is the other side of the fixed body 12 and the movable body 14. At least a part of the portion forming the guide portion is made of metal. Specifically, for example, a plate-like metal member may be embedded in the 2 nd member, and an exposed portion of the metal member may be formed in the guide portion so as to slide with the support portion. It may also be the case that the support portion is composed of resin. Alternatively, the support portion may be made of metal, and the guide portion may be made of resin.
[ symbolic description ]
10. Lens driving device
12. Fixing body
14. Moving body
16. Lens support
18. No. 1 frame body
20. Hole for lens installation
22. No. 1 moving body plate
24. 2 nd moving body plate
26. No. 1 cover
28 Through holes 30,32
34. Orthogonal direction supporting mechanism
36. No. 1 supporting mechanism
38. No. 2 supporting mechanism
40 40A,40B 1 st support part
42 42A,42B 1 st guide portion
44 44A,44B No. 2 support
46 46A,46B 2 nd guide
48. Mounting part
50. Mounting hole
52. Mounted part
54. 1 st magnet
56. 1 st yoke
58. 2 nd magnet
60. Yoke 2
62. No. 2 frame body
64. Base station
66. 2 nd cover cap
68. Bottom surface portion
70. Upper face
72 74 through holes
76. Pillar portion
78. Flexible printing substrate
80. Terminal part
82. 1 st coil
84. 2 nd coil
86. Magnetic component
88. Optical axis direction supporting mechanism
90. Main guide shaft
92. Auxiliary guide shaft
94. Guide hole
96. Guide wall
98. Metal component
98A,98B 1 st exposed portion
100. Metal component
100A,100B No. 2 exposed portion
Claims (9)
1. An optical component driving apparatus is provided, which comprises a driving unit,
has a guiding mechanism for guiding the movement of the optical component,
the guide mechanism has a support portion formed as a protrusion on the 1 st member, a guide portion formed as a groove on the 2 nd member, the support portion being fitted into the guide portion, the support portion sliding along the guide portion,
one of the support portion and the sliding portion of the guide portion is made of metal, and the other is made of resin.
2. The optical component driving apparatus according to claim 1, wherein the metal is a metal component constituting a bottom surface of the groove, and is embedded in the 2 nd component formed of resin.
3. The optical member driving device according to claim 2, wherein the metal member is formed in a plate shape, a cross section in a direction orthogonal to a moving direction of a portion constituting the bottom surface of the groove is formed in a V-shape or a U-shape, and a linear shape parallel to a plate surface of the plate shape.
4. An optical member driving apparatus according to claim 3, wherein the metal member has a rectangular shape, and one of two sides facing each other is provided with a portion forming the V-shape or the U-shape at both ends thereof, and the other side is provided with a portion forming the straight line shape at both ends thereof.
5. An optical member driving apparatus according to claim 3, wherein a cross section of a direction orthogonal to the moving direction of the supporting portion is semicircular or semi-elliptical.
6. The optical component driving apparatus according to claim 1, wherein,
having one said 1 st part and two said 2 nd parts,
the one 1 st member has the support portions on both sides in the optical axis direction of the optical member,
the two 2 nd members sandwich the 1 st member from both sides in the optical axis direction, and at the same time, one of them has a supporting body intended to support the optical member,
the grooves of the guide portions provided in the two 2 nd members are oriented orthogonally to each other.
7. A photographic apparatus characterized by having the optical member driving apparatus according to claim 1 and a lens as the optical member.
8. A photographic apparatus characterized by having the optical component driving apparatus according to claim 1 and an image sensor as the optical component.
9. An electronic device having a camera device as claimed in one of claims 7 or 8.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210359808.3A CN116256927A (en) | 2022-04-07 | 2022-04-07 | Optical component driving device, optical device, and electronic apparatus |
| JP2023060305A JP2023155198A (en) | 2022-04-07 | 2023-04-03 | Lens drive device, camera device, and electronic apparatus |
| JP2023060281A JP2023155197A (en) | 2022-04-07 | 2023-04-03 | Optical member driving device, camera device, and electronic apparatus |
| JP2023060252A JP7628571B2 (en) | 2022-04-07 | 2023-04-03 | Optical member driving device, camera device and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210359808.3A CN116256927A (en) | 2022-04-07 | 2022-04-07 | Optical component driving device, optical device, and electronic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116256927A true CN116256927A (en) | 2023-06-13 |
Family
ID=86686745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210359808.3A Pending CN116256927A (en) | 2022-04-07 | 2022-04-07 | Optical component driving device, optical device, and electronic apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7628571B2 (en) |
| CN (1) | CN116256927A (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3842093B2 (en) | 2001-10-01 | 2006-11-08 | コニカミノルタフォトイメージング株式会社 | Imaging device |
| JP3922278B2 (en) | 2004-09-10 | 2007-05-30 | コニカミノルタフォトイメージング株式会社 | Camera with shake correction mechanism |
| JP2009042549A (en) | 2007-08-09 | 2009-02-26 | Konica Minolta Opto Inc | Driving device and electronic equipment |
| JP2009093001A (en) | 2007-10-10 | 2009-04-30 | Konica Minolta Opto Inc | Imaging apparatus and electronic equipment |
| JP5007373B1 (en) | 2012-03-14 | 2012-08-22 | アルプス電気株式会社 | Lens drive device |
| KR20150136786A (en) | 2014-05-28 | 2015-12-08 | 삼성전기주식회사 | Actuator and Camera Module including the Same |
| US20210263392A1 (en) | 2018-06-21 | 2021-08-26 | Cambridge Mechatronics Limited | Shape memory alloy actuation apparatus |
| WO2020080906A1 (en) | 2018-10-19 | 2020-04-23 | 엘지이노텍 주식회사 | Camera actuator and camera module including same |
| JP7123026B2 (en) | 2019-11-13 | 2022-08-22 | 新思考電機有限公司 | Optical member driving device, camera device and electronic equipment |
| US20210373353A1 (en) | 2020-05-28 | 2021-12-02 | New Shicoh Motor Co., Ltd. | Lens driving device, camera device, and electronic apparatus |
| CN113791482A (en) | 2020-05-28 | 2021-12-14 | 新思考电机有限公司 | Driving device, camera device and electronic equipment |
-
2022
- 2022-04-07 CN CN202210359808.3A patent/CN116256927A/en active Pending
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2023
- 2023-04-03 JP JP2023060252A patent/JP7628571B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP7628571B2 (en) | 2025-02-10 |
| JP2023155195A (en) | 2023-10-20 |
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