JP6679936B2 - Lens drive device and optical instrument - Google Patents

Description

  The present invention relates to a lens driving device and an optical device.

  Conventionally, a lens driving device that drives a lens in the optical axis direction has been known (see Patent Document 1). In the conventional lens driving device, high precision is required for a member relating to lens driving, and the difficulty of manufacturing increases as the number of parts increases.

JP, 2014-10244, A

The lens driving device includes a lens holding member that holds a lens, a fixing member, a first holding member that is connected to the lens holding member and the fixing member, and has a component in a direction orthogonal to an optical axis of the lens. Drive for moving the lens holding member in the optical axis direction of the lens with respect to the fixing member in a state where the plate-shaped portion and the first plate-shaped portion are connected to the lens holding member and the fixing member. A source, the first plate-shaped portion has an opening through which the light beam incident on the lens passes, and the first plate-shaped portion has the opening in a direction orthogonal to the optical axis. Having one end and the other end arranged so as to sandwich the lens, the one end is connected to the fixing member, the other end is connected to the lens holding member, the lens holding member is the lens The holding member is different from the fixing member Has a regulating member for regulating the movement of the lens holding member in the case of moving the optical axis direction, the regulating member is Ru is disposed on the inner peripheral side of the opening.
The optical device includes the above lens driving device.

It is the perspective view which looked at the information terminal device as an example of the optical equipment in which the lens drive device is carried from the back side. It is an exploded view of a camera module. It is a sectional view of a camera module in a section including an optical axis of a lens. It is a perspective view of an AF subassembly, and illustration of a lens barrel is omitted. FIG. 6 is an exploded view of an AF subassembly. It is a figure explaining the assembly sequence of AF subassembly, (a) is a figure which shows fixing a 1st and 2nd metal plate and AF frame first, (b) is a figure which shows first and. It is a figure which shows fixing a 2nd metal plate and an anti-vibration frame, (c) is an AF frame through a 1st and 2nd metal plate after the figure shown to (a) or (b). It is a figure which shows that an anti-vibration frame is connected. It is the figure which looked at the camera module which removed the shield case from the front, and has emphasized and displayed FPC for vibration proof with a thick line. It is the figure which looked at AF subassembly from the side, and abbreviate | omits illustration of a lens barrel. (A) is a diagram showing a state where the AF frame is driven forward, (b) is a diagram showing a state where the AF frame is not driven, and (c) is a state where the AF frame is driven backward. FIG. It is a figure which shows a modification. It is a figure which shows a modification. It is a figure which shows a modification. It is a figure which shows a modification.

  An embodiment of a lens driving device and an optical device will be described with reference to FIGS. FIG. 1 is a perspective view of an information terminal device as an example of an optical device in which a lens driving device is mounted, viewed from the back side. The information terminal device 1 is, for example, a tablet type information terminal device, has a small thickness, is provided with a large-sized liquid crystal monitor (not shown) on the front surface, and is equipped with a camera module 10 on the back surface side.

2 is an exploded view of the camera module 10, and FIG. 3 is a cross-sectional view of the camera module 10 in a cross section including the optical axis of the lens. For convenience of explanation, the subject side is the front side of the camera module 10 along the optical axis AX direction of the taking lens 101 shown in FIG. 3, and the opposite side is the rear side of the camera module 10. The vertical direction in FIGS. 2 and 3 is the vertical direction of the camera module 10, and the direction perpendicular to the paper surface in FIG. 3 is the horizontal direction of the camera module 10.
The camera module 10 includes an AF subassembly 100 (FIG. 2) for moving the taking lens 101 shown in FIG. 3 in the optical axis AX direction, that is, the front-back direction, and vertical and horizontal directions in which the AF subassembly 100 is perpendicular to the optical axis AX. A fixed frame 200 that holds the AF subassembly 100 movably and a vibration isolation drive device 250 that drives the AF subassembly 100 vertically and horizontally with respect to the fixed frame 200.
A front cover 211 and a rear cover 212 are attached to the front and rear of the fixed frame 200. The camera module 10 is covered with a shield case 213 from the front.

--- AF subassembly 100 ---
FIG. 4 is a perspective view of the AF subassembly 100, and the lens barrel 102 is not shown. FIG. 5 is an exploded view of the AF subassembly 100.
The AF subassembly 100 will be described with reference to FIGS.
As shown in FIG. 5, the AF subassembly 100 includes a taking lens 101, a lens barrel 102 that holds the taking lens 101, an AF frame 110 that holds the lens barrel 102, first and second metal plates 120 ,. 130, a vibration isolation frame 140, and an AF drive device 150.

The AF frame 110 is a resin member in the form of a thick plate that has an opening 111 into which the lens barrel 102 is inserted and fixed, and a fixing portion 112 that fixes the metal plates 120 and 130 above the opening 111. is there. As shown in FIGS. 4 and 5, a plurality of protrusions 113, 113 are provided on each of the lower front surface and the rear surface of the AF frame 110. These protrusions 113 and 113 are arranged in the optical axis AX direction of the AF frame 110 so that the lens barrel 102 does not come into contact with other members even when the AF frame 110 moves in the optical axis AX direction as described later. Is a part that regulates the movement amount of.
As shown in FIG. 3, the inserted lens barrel 102 is fixed to the opening 111 by, for example, bonding. As shown in FIGS. 3 and 4, the upper part of the first metal plate 120 is located in the front part of the fixed part 112, and the upper part of the second metal plate 130 is located in the rear part of the fixed part 112 by, for example, outsert molding. It is fixed. An AF magnet 152 of the AF drive device 150, which will be described later, is attached to the upper surface of the fixed portion 112.

As shown in FIG. 5, the first metal plate 120 is a thin metal plate having a substantially rectangular shape, and has an opening 121 through which the lens barrel 102 is inserted and having a diameter larger than the outer diameter of the lens barrel 102. Have. The first metal plate 120 is further located above the opening 121 and extends in the left-right direction orthogonal to the optical axis AX, and the lower side of the opening 121 extends in the left-right direction. It has an existing lower side portion 123 and a pair of side side portions 124 and 125 which are located in the left-right direction with the opening 121 interposed therebetween and which extend in the vertical direction. The upper side portion 122 and the lower side portion 123 exist in at least a region where the opening 121 is not formed in the direction orthogonal to the optical axis AX. The shape of the opening 121 is a substantially rectangular shape having curved surfaces at the four corners. Therefore, as shown in FIGS. 4 and 5 and FIG. 7 to be described later, the widths of the pair of side portions 124 and 125 in the left-right direction are the width W1 at the position near the upper side portion 122 and the width near the lower side portion 123. The width W3 is larger than the width W2 near the center in the vertical direction. Each of the pair of side edges 124, 125 extends in the vertical direction and has a predetermined width in the horizontal direction.
In this way, the first metal plate 120 is arranged so as to have a component in the direction orthogonal to the optical axis AX of the taking lens 101. That is, the first metal plate 120 is a member having a surface extending in the vertical direction and the horizontal direction orthogonal to the optical axis AX. Here, the direction orthogonal to the optical axis AX refers to the vertical direction and the horizontal direction, but it is not limited to the direction that is strictly orthogonal to the optical axis AX, and the direction due to manufacturing error or the like may be used. The deviation and the tilting of the first metal plate 120 in the front-rear direction that does not affect the AF accuracy are allowed. The same applies to the second metal plate 130 described later.

As shown in FIG. 5, the second metal plate 130 is a thin metal plate having the same shape as the first metal plate 120. The second metal plate 130 has an opening 131 having a diameter larger than the diameter of the lens barrel 102, into which the lens barrel 102 is inserted, an upper side portion 132 extending in the left-right direction orthogonal to the optical axis AX, and a left-right direction. It has a lower side part 133 extending and a pair of side parts 134, 135 extending in the vertical direction. The upper side portion 132 and the lower side portion 133 exist in at least a region where the opening 131 is not formed in the direction orthogonal to the optical axis AX.
The shape of the opening 131 is a substantially rectangular shape whose four corners are curved surfaces. Therefore, the lateral widths of the side portions 134 and 135 are such that the width W1 at a position near the upper side portion 132 and the width W3 at a position near the lower side portion 133 are larger than the width W2 near the center in the vertical direction. Each of the pair of side portions 134 and 135 extends in the vertical direction and has a predetermined width in the horizontal direction.
In this way, the second metal plate 130 is arranged so as to have a component in the direction orthogonal to the optical axis AX of the taking lens 101.

As shown in FIGS. 3 and 4, the upper side portion 122 of the first metal plate 120 has an opening 122a, which is fixed to the front portion of the fixing portion 112 of the AF frame 110 by the outsert molding. There is. The lower side portion 123 of the first metal plate 120 is fixed to the lower portion of the vibration-proof frame 140 by, for example, insert molding.
Similarly, the upper side portion 132 of the second metal plate 130 has an opening 132a, and is fixed to the rear portion of the fixing portion 112 of the AF frame 110 by the outsert molding through the opening 132a. The lower side portion 133 of the second metal plate 130 is fixed to the lower portion of the vibration isolation frame 140 by, for example, insert molding.
As described above, the first metal plate 120 and the second metal plate 130 are separated from each other in the front-rear direction in the optical axis direction with the AF frame 110 interposed therebetween, and are arranged substantially parallel to each other. Is fixed to the AF frame 110 at, and is fixed to the vibration isolation frame 140 at the lower side portions 123 and 133.

As shown in FIG. 5, the vibration isolation frame 140 is a resin member that holds the AF frame 110 via the first and second metal plates 120 and 130, and includes a thick plate-shaped frame member 141. The frame member 141 includes a VCM holding portion 142 that protrudes forward at an upper portion and a fixing portion 143 that protrudes forward at a lower portion of the frame member 141. The lens barrel 102 is inserted through the frame member 141, and an opening 144 having a diameter larger than the diameter of the lens barrel 102 is provided. An AF coil 151 and an AF yoke 153 of the AF driving device 150, and an AF Hall element 161 are attached to the VCM holding unit 142. An AF FPC (flexible printed circuit board) 170 shown in FIG. 2 is connected to the AF coil 151 and the AF hall element 161.
As described above, in FIGS. 3 and 4, the lower side portion 123 of the first metal plate 120 and the lower side portion 133 of the second metal plate 130 are fixed to the fixing portion 143 of the vibration isolation frame 140. .

The AF drive device 150 includes an AF coil 151 that constitutes a voice coil motor, an AF magnet 152, and an AF yoke 153. The AF magnet 152 is attached to the fixed portion 112 of the AF frame 110. The AF drive device 150 is a moving magnet type drive device, and uses the power supplied from the AF FPC 170 to move the fixed portion 112 of the AF frame 110 to which the AF magnet 152 is attached in the front-back direction with respect to the vibration isolation frame 140. Drive to. It should be noted that a moving coil system in which the mounting positions of the coil and the magnet are reversed may be used.
A magnetic spring is formed by the AF magnet 152 attached to the fixed portion 112 of the AF frame 110 and the AF yoke 153 attached to the VCM holding portion 142 of the image stabilizing frame 140. When the AF coil 151 is not energized, the AF frame 110 is urged by the magnetic spring so that the AF frame 110 stands still at the neutral position in the front-rear direction with respect to the vibration isolation frame 140.
The AF hall element 161 is a sensor for detecting the position of the AF frame 110, that is, the photographing lens 101 in the optical axis AX direction.

As described above, in the AF subassembly 100 according to the present embodiment, as shown in FIG. 4, the AF frame 110 is attached to the vibration isolation frame 140 via the first and second metal plates 120 and 130. ing.
The first and second metal plates 120 and 130 may be fixed to the AF frame 110 first, and then the metal plates 120 and 130 and the vibration isolation frame 140 may be fixed to each other. The second metal plates 120, 130 and the vibration isolation frame 140 may be fixed, and then the first and second metal plates 120, 130 and the AF frame 110 may be fixed. That is, as shown in FIG. 6A, the upper side portion 122 of the first metal plate 120 and the upper side portion 132 of the second metal plate 130 (not shown) are integrally molded with the AF frame 110, and then, as shown in FIG. As shown in c), the lower side portions 123 and 133 of the first and second metal plates 120 and 130 may be integrally formed with the vibration isolation frame 140. Further, as shown in FIG. 6B, after the lower side portions 123 and 133 of the first and second metal plates 120 and 130 are integrally molded with the vibration isolation frame 140, as shown in FIG. The upper side portion 122 of the first metal plate 120 and the upper side portion 132 of the second metal plate 130 (not shown) may be integrally formed with the AF frame 110.

As shown in FIGS. 2 and 3, the fixed frame 200 has an opening 201 having a diameter larger than the diameter of the lens barrel 102, into which the lens barrel 102 is inserted, and three ceramic balls 181 form the AF subassembly 100, specifically The rear surface of the vibration isolation frame 140 is supported at three points, and the AF subassembly 100 is movably held in the vertical and horizontal directions perpendicular to the optical axis AX.
The anti-vibration drive device 250 has a pair of anti-vibration coils 251 and 251 forming a pair of voice coil motors, a pair of anti-vibration magnets 252 and 252, and a pair of anti-vibration yokes 253 and 253. The pair of anti-vibration coils 251, 251 and the pair of anti-vibration yokes 253, 253 are attached to the fixed frame 200, and the pair of anti-vibration magnets 252, 252 are attached to the rear surface of the anti-vibration frame 140. There is. The anti-vibration drive device 250 is a moving magnet type drive device, and uses the electric power supplied from the anti-vibration FPC 270 to move the anti-vibration frame 140 to which the anti-vibration magnet 252 is attached vertically to the fixed frame 200. Drive left and right. In the present embodiment, the moving magnet system is used, but a moving coil system may be used, and in the case where it does not have a vibration-proof function, the vibration-proof drive device 250 and the fixed frame 200 may be omitted. Further, the method of supporting the vibration-proof frame 140 with respect to the fixed frame 200 can be appropriately modified to a method of suspending with a wire, a guide shaft method, or the like, other than the three-point support by the ceramic balls 181.
A magnetic spring is formed by the pair of anti-vibration magnets 252 and 252 attached to the anti-vibration frame 140 and the pair of anti-vibration yokes 253 and 253 attached to the fixed frame 200. When the pair of anti-vibration coils 251 and 251 are not energized, the magnetic spring urges the anti-vibration frame 140 so that the anti-vibration frame 140 is stationary at the neutral position in the up-down direction and the left-right direction. There is.
The pair of anti-vibration Hall elements 261 and 261 are sensors for detecting the position of the anti-vibration frame 140, that is, the vertical and horizontal directions with respect to the optical axis AX of the taking lens 101.

  FIG. 7 is a diagram of the camera module 10 with the shield case 213 removed, as viewed from the front, in which the anti-vibration FPC 270 is highlighted with a bold line. In the vibration isolation FPC 270, a portion 271 extending in the vertical direction is arranged on the outer side (right side surface) of the fixed frame 200, and a portion 272 extending in the horizontal direction and a portion 273 extending in the vertical direction are the same as the fixed frame 200. It is arranged in an L shape in a space between the AF frame 110. Even if the vibration isolation frame 140 is driven in the vertical direction and the horizontal direction with respect to the fixed frame 200, the vibration isolation FPC 270 can be appropriately modified. Therefore, the anti-vibration FPC 270 does not prevent the anti-vibration frame 140 from driving in the up-down direction and the left-right direction with respect to the fixed frame 200.

  When the anti-vibration frame 140 is anti-vibration driven by the anti-vibration drive device 250, the lens barrel 102 attached to the anti-vibration frame 140 via the first and second metal plates 120 and 130 and the AF frame 110 is removed. The fixed frame 200 is driven vertically and horizontally. In this way, the image stabilization drive device 250 drives the image stabilization frame 140, whereby the image stabilization of the taking lens 101 is performed.

--- Regarding the driving of the AF frame 110 in the AF subassembly 100 ---
8A to 8C are views of the AF subassembly 100 as seen from the side, and the lens barrel 102 is not shown.
As shown in FIGS. 8A to 8C, in the AF subassembly 100 according to the present embodiment, the fixing portion 112 of the AF frame 110, the fixing portion 143 of the image stabilizing frame 140, and the first metal plate 120. The side edges 124 and 125 of the second metal plate 130 and the side edges 134 and 135 of the second metal plate 130 form a four-link mechanism. That is, the fixed portion 112 of the AF frame 110 and the fixed portion 143 of the vibration isolation frame 140 correspond to links extending in the front-rear direction, and the side portions 124 and 125 of the first metal plate 120 and the second metal. The side portions 134 and 135 of the plate 130 correspond to links extending in the vertical direction. As described above, in the present embodiment, a link mechanism capable of moving the lens barrel 102 in the optical axis AX direction can be realized with a small number of parts.

  When the fixed portion 112 of the AF frame 110 is driven in the front-rear direction with respect to the image stabilizing frame 140 by the AF driving device 150, the side portions 124 and 125 of the first metal plate 120 and the second metal plate 130 are moved. The side portions 134 and 135 function as leaf springs. As shown in FIG. 8B, when the fixing portion 112 of the AF frame 110 is driven by the AF driving device 150 with respect to the image stabilizing frame 140 in the arrow direction, that is, in the forward direction, the first metal plate 120 moves. The side portions 124 and 125 and the side portions 134 and 135 of the second metal plate 130 bend, and the fixed portion 112, that is, the AF frame 110 moves forward in parallel with the optical axis AX together with the lens barrel 102 (not shown). At this time, the AF frame 110 is only supported by the first metal plate 120 and the second metal plate 130 by the fixing portion 112, and the lower side of the fixing portion 112 is not supported. Therefore, as the fixed portion 112 is driven in the front-back direction by the AF driving device 150, the AF frame 110 can move in the optical axis AX direction without tilting with respect to the optical axis AX.

Further, as shown in FIG. 8C, when the fixing portion 112 of the AF frame 110 is driven by the AF driving device 150 with respect to the vibration isolation frame 140 in the arrow direction, that is, in the backward direction, the first metal plate The side portions 124 and 125 of 120 and the side portions 134 and 135 of the second metal plate 130 bend, and the fixed portion 112, that is, the AF frame 110 moves rearward in parallel with the optical axis AX together with the lens barrel 102 (not shown). To do.
In this way, the photographing lens 101 is driven in the optical axis AX direction, whereby the focus adjustment operation is performed.

In the AF subassembly 100 configured as described above, the fixed portion 112 of the AF frame 110 and the fixed portion 143 of the vibration-proof frame 140 are in positions facing each other with the optical axis AX in between, and the fixed portion 112 and the fixed portion 143. By securing the distance of, the first and second metal plates 120 and 130 are easily bent in the optical axis direction which is the same direction as the thickness direction thereof. As a result, the driving force of the AF driving device 150 can be reduced and the power consumption can be reduced.
Further, since the first and second metal plates 120 and 130 are formed continuously on four sides and are difficult to be deformed in the vertical direction and the horizontal direction orthogonal to the thickness direction thereof, for the purpose of camera shake correction. Even when the image stabilization drive device 250 drives the image stabilization frame 140, the first and second metal plates 120 and 130 do not bend, and the position of the taking lens 101 follows the movement of the image stabilization frame 140. As a result, the control band for camera shake correction can be widened and the performance of camera shake correction can be improved.

The first and second metal plates 120 and 130 are provided with openings 121 and 131, respectively, and the lens barrel 102 is inserted into the openings 121 and 131. As a result, the size of the camera module 10 in the optical axis AX direction can be reduced, so that the camera module 10 can be downsized.
As shown in FIG. 5, the lateral widths of the side portions 124, 125, 134, 135 are the width W1 at a position near the upper side portions 122, 132 and the width W3 at a position near the lower side portions 123, 133. The metal plates 120 and 130 were configured to be larger than the width W2 near the center in the direction. As a result, the rigidity of the metal plates 120 and 130 against external force applied in the vertical direction and the horizontal direction orthogonal to the thickness direction thereof is improved, so that the control band for camera shake correction can be further widened and the performance of camera shake correction can be improved. Can be further improved.

The characteristics of the first and second metal plates 120 and 130 as leaf springs affect the AF control characteristics in the camera module 10 of the present embodiment. The thickness of the metal plates 120 and 130 is the thickness of the metal plate as a raw material, but the thickness of the metal plates 120 and 130 is also stable because the quality of the metal plates distributed in the market is stable. Further, the first and second metal plates 120 and 130 are only fixed in the vertical direction to the respective fixing portions, and the number of fixing points can be reduced to two per metal plate. Therefore, the manufacturing accuracy can be improved, and the AF control characteristics of the camera module 10 according to the present embodiment are stable.
Since the shapes of the metal plates 120 and 130 are simple, it is easy to manage the dimensions of each part. Therefore, the AF control characteristics of the camera module 10 of the present embodiment are stable.

Since the first metal plate 120 and the second metal plate 130 have the same shape, the deformation of the first metal plate 120 and the deformation of the second metal plate 130 due to the temperature change are the same. Therefore, thermal stress that adversely affects AF accuracy is less likely to occur in each part of the AF subassembly 100 even if there is a temperature change, so that the AF accuracy in the camera module 10 of the present embodiment is improved.
Since the taking lens 101 is configured to move in the optical axis AX direction by utilizing the bending of the first and second metal plates 120 and 130, it is possible to suppress the deformation of the resin AF frame 110 and the vibration isolation frame 140. , Durability is improved.

  The first and second metal plates 120, 130 and the AF frame 110 are integrally molded, and the first and second metal plates 120, 130 and the vibration isolation frame 140 are integrally molded. Therefore, the accuracy of the relative positions of the AF frame 110 and the vibration isolation frame 140 is determined at the stage of the parts integrally molded with the first and second metal plates 120 and 130, and is used in the assembly process of the camera module 10. Does not depend on. Therefore, it becomes easy to ensure the accuracy of the relative position between the AF frame 110 and the image stabilization frame 140, and the AF accuracy in the camera module 10 of the present embodiment is improved.

As described above, the camera module 10 of the present embodiment has the following effects.
(1) The AF subassembly 100 is connected to the AF frame 110 that holds the lens barrel 102 that holds the taking lens 101, the image stabilizing frame 140, the AF frame 110 and the image stabilizing frame 140, and the optical axis of the taking lens 101. The first metal plate 120 arranged so as to have a component in a direction orthogonal to AX, and the AF frame 110 with the first metal plate 120 connected to the AF frame 110 and the vibration isolation frame 140 An AF driving device 150 that moves the photographing lens 101 in the optical axis AX direction with respect to the frame 140. The first metal plate 120 has an opening 121 through which the light flux incident on the taking lens 101 passes. The first metal plate 120 has a lower side portion 123 and an upper side portion 122 which are arranged so as to sandwich the opening 121 in a direction orthogonal to the optical axis AX. The lower side portion 123 is connected to the vibration isolation frame 140. The upper side portion 122 is connected to the AF frame 110.
With this, the AF frame 110 can be moved in the optical axis AX direction of the taking lens 101 with respect to the image stabilizing frame 140 with a simple configuration, and thus the inexpensive and highly durable camera module 10 can be provided.

(2) The AF subassembly 100 is connected to the AF frame 110 and the vibration isolation frame 140, has a component in a direction orthogonal to the optical axis AX of the taking lens 101, and is in the optical axis AX direction with respect to the first metal plate 120. And a second metal plate 130 arranged so as to be spaced apart from each other. The second metal plate 130 has an opening 131 through which the light flux incident on the taking lens 101 passes. The second metal plate 130 has a lower side portion 133 and an upper side portion 132 which are arranged so as to sandwich the opening 131 in a direction orthogonal to the optical axis AX, and the lower side portion 133 is connected to the vibration-proof frame 140. The upper side portion 132 is connected to the AF frame 110. The AF drive device 150 moves the AF frame 110 with respect to the vibration isolation frame 140 in the optical axis AX direction with the first metal plate 120 and the second metal plate 130 connected to the AF frame 110 and the vibration isolation frame 140. Move to.
With this, the AF frame 110 can be moved in the optical axis AX direction of the taking lens 101 with respect to the image stabilizing frame 140 with a simple configuration, and thus the inexpensive and highly durable camera module 10 can be provided.

(3) The first metal plate 120 and the second metal plate 130 are arranged in parallel. As a result, a link mechanism capable of moving the taking lens 101 in the optical axis AX direction can be realized with a small number of parts, so that the inexpensive and highly durable camera module 10 can be provided.

(4) The AF subassembly 100 has the lens barrel 102 that holds the outer periphery of the taking lens 101, and the first metal plate 120 is connected to the AF frame 110 and the vibration-proof frame 140. At least a part of it can be inserted into the inner peripheral side of the opening 121. As a result, the size of the camera module 10 in the optical axis AX direction can be reduced, so that the camera module 10 can be downsized.

(5) The camera module 10 includes the fixed frame 200, the ceramic sphere 181 supporting the rear surface of the vibration isolation frame 140, in order to drive the AF frame 110 and the vibration isolation frame 140 in the direction perpendicular to the optical axis AX direction. The image stabilization drive device 250 is provided. As a result, camera shake correction can be performed with a simple configuration.
(6) The first metal plate 120 has a rectangular outer shape when viewed from the optical axis AX direction. Since the shape of the first metal plate 120 is simple, it is easy to manage the dimensions of each part. Therefore, the AF control characteristics of the camera module 10 of the present embodiment are stable.

The following modifications are also within the scope of the present invention, and one or a plurality of modifications can be combined with the above-described embodiment.
(Modification 1) In the above description, the upper side portions 122 and 132 and the lower side portions 123 and 133 of the first and second metal plates 120 and 130 are continuously formed. That is, the side edges 124, 125, 134, and 135 were not provided with cuts, cutouts, openings, or the like. In this modification, for example, as shown in FIG. 9, openings 126 are provided in the side portions 124 and 125 of the first metal plate 120A, and openings 136 are provided in the side portions 134 and 135 of the second metal plate 130A. It was
The number of openings 126, 136 in each of the side portions 124, 125, 134, 135 may be one or two or more. By providing the openings 126, 136 in the side portions 124, 125, 134, 135, the light of the side portions 124, 125, 134, 135 can be changed without changing the thickness of the side portions 124, 125, 134, 135. The flexural rigidity in the axis AX direction can be adjusted.
In the above description, the upper side portion 122, the side side portions 124 and 125, and the lower side portion 123 are formed continuously, but if the upper side portions 122 and 132 and the lower side portions 123 and 132 are formed, there is a break. May be.
Further, each side does not have to be formed in a straight line, and at least a part may be cut to the extent that it does not affect the driving of the taking lens 101 in the optical axis AX direction.

(Modification 2) In the above description, the first metal plate 120 and the second metal plate 130 were separate members. In this modification, for example, as shown in FIG. 10, instead of the first and second metal plates 120 and 130, a single metal plate 120C formed by bending in a U-shape is used. The metal plate 120C includes a first plate part 120B having the same shape as the first metal plate 120, a second plate part 130B having the same shape as the second metal plate 130, the first plate part 120B and the second plate part 120B. Bottom part 127 that connects the lower parts of the plate parts 130B to each other. Although not shown in FIG. 10, the bottom 127 of the metal plate 120C is fixed to the fixing portion 143 of the vibration-proof frame 140 by insert molding, for example. Instead of the first and second metal plates 120 and 130, even if one metal plate 120C formed by bending in a U-shape is used, the same effects as the above-described effects can be obtained. In addition, the number of parts that make up the AF subassembly 100 can be reduced, and the assembly process can be simplified. Further, the shape of the metal plate when viewed from the front-rear direction is not limited to a substantially rectangular shape, and can be appropriately modified such as a trapezoid. Furthermore, although a metal plate is used as the plate-shaped member, a plate-shaped member formed of a material other than metal may be used as long as there is no problem in elasticity and durability.

(Modification 3) In the above description, the AF frame 110 and the lens barrel 102 are separate members. In this modification, as shown in FIG. 11, the AF frame 110A is integrally formed with the lens barrel portion 102A that holds the taking lens 101. As a result, it is not necessary to bond the AF frame 110 and the lens barrel 102, and the assembly process can be simplified. In addition, since the weight of the portion that moves in the optical axis AX direction can be reduced, the inertial mass when moving in the optical axis AX direction is reduced, the focusing speed is improved, and the driving power in the optical axis AX direction is reduced. it can.

(Modification 4) In the above description, the AF drive unit 150 having the AF coil 151, the AF magnet 152, and the AF yoke 153 causes the AF frame 110 to move in the optical axis AX direction with respect to the image stabilization frame 140. Driven. In the present modification, instead of the AF drive device 150, for example, a bimorph actuator drives the AF frame 110 in the optical axis AX direction with respect to the vibration isolation frame 140. For example, as shown in FIG. 12, a pair of piezoelectric plates may be formed on the front and rear surfaces of the metal plates 120 and 130 at the upper and lower sides of the side portions 124, 125, 134 and 135 of the first and second metal plates 120 and 130, respectively. The elements 191, 191 are attached. In this way, the pair of piezoelectric elements 191, 191 attached to the front and rear surfaces of the metal plates 120, 130 constitute a bimorph actuator. Then, the bimorph actuator causes the first and second metal plates 120 and 130 to bend in the optical axis AX direction. As a result, the space for disposing the AF coil 151, the AF magnet 152, and the AF yoke 153 can be reduced, and the camera module 10 can be downsized. As described above, the AF driving device 150 is not particularly limited, and other driving members other than the voice coil motor can be applied. When the AF drive device 150 is a voice coil motor, the function of the AF yoke 153 can be shared by other members and omitted.

(Modification 5) In the above description, the AF driving device 150 provided above the AF frame 110 drives the AF frame 110 in the optical axis AX direction with respect to the image stabilizing frame 140. A drive device similar to the AF drive device 150 may be provided and the drive device and the AF drive device 150 may be used to drive the AF frame 110 in the optical axis AX direction with respect to the image stabilization frame 140.

(Modification 6) In the above description, the camera shake correction in the camera module 10 is based on the so-called lens shift method in which the taking lens 101 is driven in the direction orthogonal to the optical axis AX. However, the camera shake correction in the camera module 10 may be performed by swinging the taking lens 101.

  The camera module 10 of the present embodiment is not limited to a tablet-type information terminal device, but a portable information terminal device such as a mobile phone, a smartphone, a wristwatch-type terminal, a personal computer, a music player, a fixed telephone, a wearable device, or the like. Can be incorporated into the electronic device of.

  Although various embodiments and modifications have been described above, the present invention is not limited to these contents. Other aspects that are conceivable within the scope of the technical idea of the present invention are also included within the scope of the present invention.

1; information terminal device, 10; camera module, 100; AF subassembly, 101; taking lens, 102; lens barrel, 110; AF frame, 120; first metal plate, 121; opening, 122; upper side, 123; Lower side, 130; Second metal plate, 131; Opening, 132; Upper side, 133; Lower side, 140; Anti-vibration frame, 150; AF drive device, 181, Ceramic ball, 200; Fixed frame, 250; Anti-vibration drive device

Claims (11)

A lens holding member for holding the lens,
A fixing member,
A first plate-shaped portion which is connected to the lens holding member and the fixing member and is arranged to have a component in a direction orthogonal to the optical axis of the lens;
A drive source that moves the lens holding member in the optical axis direction of the lens with respect to the fixing member in a state where the first plate-shaped portion is connected to the lens holding member and the fixing member;
Equipped with
The first plate-shaped portion has an opening for passing a light beam incident on the lens,
The first plate-shaped portion has one end and the other end arranged to sandwich the opening in a direction orthogonal to the optical axis,
The one end is connected to the fixing member,
The other end is connected to the lens holding member ,
The lens holding member has a restricting member that restricts movement of the lens holding member when the lens holding member moves in the optical axis direction with respect to the fixing member,
The regulating member is a lens driving device that will be disposed on the inner peripheral side of the opening. The lens driving device according to claim 1,
A second member connected to the lens holding member and the fixing member, having a component in a direction orthogonal to the optical axis of the lens, and being separated from the first plate-shaped portion in the optical axis direction; Equipped with a plate-shaped part of
The second plate-shaped portion has an opening through which the light flux incident on the lens passes.
The second plate-shaped portion has one end and the other end arranged so as to sandwich the opening in a direction orthogonal to the optical axis, and is connected to the fixing member at the one end, Connected to the lens holding member at the other end,
The drive source is configured such that when the first plate-shaped portion and the second plate-shaped portion are connected to the lens holding member and the fixing member, the lens holding member is attached to the optical axis of the lens holding member with respect to the fixing member. A lens drive that moves in the direction. The lens driving device according to claim 2,
The lens driving device in which the first plate-shaped portion and the second plate-shaped portion are arranged in parallel. The lens driving device according to claim 2 or 3,
The lens holding member has a lens barrel that holds the outer periphery of the lens,
A lens driving device, wherein at least a part of the lens barrel can be inserted into an inner peripheral side of the opening in a state where the first plate-shaped portion is connected to the lens holding member and the fixing member. The lens drive device according to any one of claims 2 to 4,
The lens driving device further comprising a driving mechanism that drives the lens holding member and the fixing member in a direction perpendicular to the optical axis direction. The lens drive device according to any one of claims 2 to 5,
The lens driving device in which the one end portion and the other end portion of the first plate-shaped portion are continuously formed. The lens driving device according to any one of claims 2 to 6,
The lens drive device in which the first plate-shaped portion has a rectangular outer shape when viewed from the optical axis direction. The lens driving device according to any one of claims 2 to 7,
A first connecting portion that connects the one end portion of the first plate-shaped portion and the one end portion of the second plate-shaped portion, or the other end portion of the first plate-shaped portion and the first connecting portion. Further comprising at least one second connecting portion connecting the other end of the second plate-shaped portion,
The first plate-shaped portion, the second plate-shaped portion, and the first connecting portion, or the first plate-shaped portion, the second plate-shaped portion, and the second connecting portion. Is a lens driving device provided on the same member. The lens driving device according to any one of claims 1 to 8,
The first plate-shaped portion is a lens driving device in which at least one hole is formed in a region between the one end portion and the other end portion. The lens drive device according to any one of claims 1 to 9,
The lens driving device, wherein the driving source is a bimorph actuator provided in the first plate-shaped portion.   An optical apparatus comprising the lens driving device according to claim 1.

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