JP2013061415A - Lens barrel and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To retract a camera-shake correction lens in a lens barrel from an optical axis to a desired position with a series of operations.SOLUTION: The lens barrel includes lens groups 108 and 110 which are moved in an optical axis direction according to a zooming operation or a focusing operation, an OIS lens 116 which can be moved in a direction orthogonal to the optical axis, and an OIS lens assembly 122 to which the OIS lens 116 is attached and which retracts the OIS lens 116 from the optical axis, when collapsing the lens groups 108 and 110, and moves the OIS lens 116 in the direction along the optical axis.

Description

  The present invention relates to a lens barrel and an imaging apparatus.

  Conventionally, in a lens barrel used for a digital camera or the like, a mechanism for rotating a part of the lens in the vertical and horizontal directions or retracting the lens by moving the lens in the vertical direction when retracted is known. Yes. For example, the following Patent Documents 1 to 3 describe a configuration for retracting a camera shake correction optical system. Patent Documents 4 to 6 listed below describe techniques in which a part of the lens of the optical system rotates and retracts from the optical axis and then retracts.

Japanese Unexamined Patent Publication No. 2007-206210 JP 2007-199320 JP 2007-199319 JP 2006-234951 A JP 2005-284247 A JP 2004-233923 A

  However, in the above conventional technique, only the operation of retracting some lenses in the lens barrel from the optical axis is performed, or the operation of retracting from the optical axis and the movement in the front-rear direction are performed separately. Was to be done. For this reason, it is difficult to retract a part of the lens in the lens barrel from the optical axis through a series of operations and store it in a desired position, which causes a problem that the retracting operation becomes complicated.

  Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to retract the camera shake correction lens in the lens barrel from the optical axis through a series of operations, and It is an object of the present invention to provide a new and improved lens barrel and image pickup apparatus that can move in a direction and can be stored in a desired position.

  In order to solve the above problems, according to one aspect of the present invention, a lens group that moves in the optical axis direction when retracted, a camera shake correction lens that is movable in a direction orthogonal to the optical axis, and a camera shake correction lens A correction lens assembly that is mounted with a lens and retracts the camera shake correction lens from the optical axis when the lens group is retracted, and moves the camera shake correction lens in a direction along the optical axis. A lens barrel is provided.

  According to the above configuration, the image stabilization lens is attached to the correction lens assembly, and when the lens group is retracted, the image stabilization lens is retracted from the optical axis, and the image stabilization lens is placed on the optical axis. It is moved in the direction along. Therefore, the camera shake correction lens can be retracted from the optical axis and retracted to a desired position when retracted, and the total length when retracted can be minimized.

  The correction lens assembly includes a base portion that supports the correction lens assembly so as to be rotatable about an axis parallel to the optical axis, and the correction lens assembly is rotated about the axis to correct the camera shake. The lens is retracted from the optical axis. With this configuration, the correction lens assembly can be retracted from the optical axis by rotating about an axis parallel to the optical axis.

  The base portion includes an inclined surface with which the correction lens assembly abuts, and the correction lens assembly moves along the inclined surface when rotating about the axis. The camera shake correction lens is moved in a direction along the optical axis. According to this configuration, the correction lens assembly can be moved in the direction along the optical axis along the inclined surface.

  A holding frame that holds the base portion so as to be movable in a direction perpendicular to the optical axis when retracted; and a support frame that is pivotally supported with respect to the holding frame. And a fixing member for fixing. According to this configuration, when retracted, the base portion is fixed to the holding frame by the fixing member. Accordingly, it is possible to reliably prevent the camera shake correction lens from moving when the lens barrel is retracted.

  The fixing member rotates at the time of retracting to hold the outer periphery of the base portion, thereby fixing the base portion to the holding frame in a direction perpendicular to the optical axis. According to this configuration, since the base portion is fixed to the holding frame in the direction orthogonal to the optical axis by the fixing member, it is ensured that the camera shake correction lens moves in the direction orthogonal to the optical axis when retracted. Can be suppressed.

  The fixing member rotates at the time of retracting to hold a surface perpendicular to the optical axis of the base portion, thereby fixing the base portion to the holding frame in the optical axis direction. According to this configuration, since the base portion is fixed to the holding frame by the fixing member in the optical axis direction, it is possible to reliably prevent the camera shake correction lens from moving in the optical axis direction when retracted.

  The fixing member is rotated when the lens barrel is retracted, thereby rotating the correction lens assembly about the axis. According to this configuration, since the correction lens assembly is rotated by the rotation of the fixing member, the base portion is fixed to the holding frame by the fixing member, and the correction lens assembly is rotated by the fixing member. Can be made.

  In order to solve the above problems, according to another aspect of the present invention, a lens group that is included in an imaging optical system that forms an optical image of a subject and moves in the optical axis direction when retracted, and the imaging optics An image pickup surface on which an optical image of a subject is formed by the system, an image pickup element that converts the optical image into an electrical signal, and the image pickup optical system that is movable in a direction perpendicular to the optical axis A camera shake correction lens and a camera shake correction lens are mounted, and when the lens group is retracted, the camera shake correction lens is retracted from the optical axis, and the camera shake correction lens is moved in a direction along the optical axis. An imaging device is provided.

  According to the above configuration, the image stabilization lens is attached to the correction lens assembly, and when the lens group is retracted, the image stabilization lens is retracted from the optical axis, and the image stabilization lens is placed on the optical axis. It is moved in the direction along. Therefore, the camera shake correction lens can be retracted from the optical axis and retracted to a desired position when retracted, and the total length when retracted can be minimized.

  The correction lens assembly includes a base portion that supports the correction lens assembly so as to be rotatable about an axis parallel to the optical axis, and the correction lens assembly is rotated about the axis to correct the camera shake. The lens is retracted from the optical axis. With this configuration, the correction lens assembly can be retracted from the optical axis by rotating about an axis parallel to the optical axis.

  The base portion includes an inclined surface with which the correction lens assembly abuts, and the correction lens assembly moves along the inclined surface when rotating about the axis. The camera shake correction lens is moved in a direction along the optical axis. According to this configuration, the correction lens assembly can be moved in the direction along the optical axis along the inclined surface.

  A holding frame that holds the base portion so as to be movable in a direction perpendicular to the optical axis when retracted; and a support frame that is pivotally supported with respect to the holding frame. And a fixing member for fixing. According to this configuration, when retracted, the base portion is fixed to the holding frame by the fixing member. Accordingly, it is possible to reliably prevent the camera shake correction lens from moving when the lens barrel is retracted.

  The fixing member rotates at the time of retracting to hold the outer periphery of the base portion, thereby fixing the base portion to the holding frame in a direction perpendicular to the optical axis. According to this configuration, since the base portion is fixed to the holding frame in the direction orthogonal to the optical axis by the fixing member, it is ensured that the camera shake correction lens moves in the direction orthogonal to the optical axis when retracted. Can be suppressed.

  The fixing member rotates at the time of retracting to hold a surface perpendicular to the optical axis of the base portion, thereby fixing the base portion to the holding frame in the optical axis direction. According to this configuration, since the base portion is fixed to the holding frame by the fixing member in the optical axis direction, it is possible to reliably prevent the camera shake correction lens from moving in the optical axis direction when retracted.

  The fixing member is rotated when the lens barrel is retracted, thereby rotating the correction lens assembly about the axis. According to this configuration, since the correction lens assembly is rotated by the rotation of the fixing member, the base portion is fixed to the holding frame by the fixing member, and the correction lens assembly is rotated by the fixing member. Can be made.

  According to the present invention, it is possible to retract the camera shake correction lens in the lens barrel from the optical axis through a series of operations and move it in the optical axis direction to be stored at a desired position.

It is a schematic diagram which shows the state which the lens-barrel is retracted. It is a schematic diagram which shows the state (state at the time of imaging | photography) in which the lens barrel retracted. It is a disassembled perspective view which shows the structure of an OIS lens group. It is a schematic diagram which shows the 1st state in which an OIS lens is located on an optical axis. It is a schematic diagram which shows the 2nd state which retracted the OIS lens below the optical axis. It is a schematic diagram which shows a mode that the hole of an OIS lens assembly is inserted in the axis | shaft of an OIS base. It is a schematic diagram which shows the state which looked at the OIS lens group from the image pick-up element side. It is the schematic diagram which expands and shows the area | region B enclosed with the dashed-dotted line in FIG. It is a schematic diagram which shows a mode that the protrusion part which protruded from the fixed frame contact | abuts to the inclined surface of a retractor guide in the process of retracting.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

[Configuration example of lens barrel]
First, the schematic configuration of the lens barrel 100 of the imaging apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram illustrating a state in which the lens barrel 100 is retracted in the imaging apparatus according to the present embodiment, and FIG. Show. 1A and 2A show the lens barrel 100 as viewed from the subject side, and FIGS. 1B and 2B show the optical axis 300 of the lens barrel 100. FIG. The cross section along is shown.

  As shown in FIG. 2, the lens barrel 100 includes a lens frame 102, a lens frame 104, a lens frame 106, and a fixed frame 107. The lens frame 102 holds the first group lens 108, and the lens frame 104 holds the second group lens 110. The lens frame 106 holds the third group lens 112. Here, the first group lens 108 and the second group lens 110 move in the optical axis direction during zooming, and the third group lens 112 moves in the optical axis direction during focusing.

  Further, an OIS lens group 114 is disposed between the second group lens 110 and the third group lens 112. The OIS lens group 114 includes an OIS lens 116 that moves in a direction orthogonal to the optical axis in accordance with the camera shake in order to correct the camera shake.

  As shown in FIG. 1, in the retracted state, the lens frame 102, the lens frame 104, and the lens frame 106 are retracted to the image sensor 109 side, and the length of the lens barrel 100 in the optical axis direction is the shortest. . As shown in FIG. 2, when the retracted lens is released (at the time of photographing), the lens frame 102, the lens frame 104, and the lens frame 106 are extended to the subject side. The first group lens 108, the second group lens 110, and the third group lens 112 are included in an imaging optical system that forms an optical image of a subject, and the image sensor 109 uses the imaging optical system to provide an optical image of the subject. Has an imaging surface on which an image is formed.

  When the lens barrel is retracted, the lens 110 a closest to the image sensor 109 of the second group lens 110 approaches the OIS lens group 114. At this time, if the OIS lens 116 is positioned on the optical axis 300, it is necessary to secure a distance between the lens 110a and the OIS lens 116, and thus the amount of collapse of the second group lens 110 is restricted. That is, the retractable amount of the second lens group 110 is reduced, and the entire length of the lens barrel 200 during the retracting operation is increased.

  For this reason, in the present embodiment, the OIS lens group 114 is retracted below the optical axis 300 when retracted as shown in FIG. Further, when retracted, the OIS lens 116 is retracted to the rear side (image sensor 109 side) with respect to the OIS lens holding frame 118 that holds the OIS lens 116 with the OIS lens 116 retracted from the optical axis 300. . This makes it possible to shorten the overall length when retracted.

  When the lens barrel 100 is thinned, it is necessary to increase the number of collapsible steps when the amount of movement of each group is large. In this case, the number of cams required for the retracting operation increases, which may cause a thin obstacle. In this embodiment, in order to further reduce the overall length of the lens barrel 100 when retracted, the lens group that retracts can be accommodated by using the unused space on the image sensor 109 side more effectively. Since the OIS lens 116 is also moved in the (optical axis direction), the retractable amount of the second group lens 110 can be increased, and further reduction in thickness can be achieved. For example, when the OIS lens 116 is moved 2 mm toward the image sensor 109 when retracted, the retracted amount of the second lens group 110 also increases by at least 2 mm compared to when the OIS lens 116 is not moved toward the image sensor 109 when retracted. be able to. Therefore, the lens barrel 100 and the imaging device can be further reduced in thickness.

[Configuration of OIS lens group]
Next, the configuration of the OIS lens group 114 will be described. FIG. 3 is an exploded perspective view showing the configuration of the OIS lens group 114. As shown in FIG. 3, the OIS lens group 114 includes an OIS lens holding frame 118, an OIS base 120, an OIS lens assembly 122, a spring 124, a holder 126, a retract guide (fixing member) 128, and springs 130 and 132. Configured.

  Magnets 134 and 136 are attached to the OIS base 120. The OIS base 120 is movable in two directions orthogonal to the optical axis 300 with respect to the OIS lens holding frame 118 by the magnetic force of the magnets 134 and 136. An OIS lens assembly 122 is mounted on the OIS base 120. An OIS lens 116 is fixed to the OIS lens assembly 122. At the time of releasing the collapse shown in FIG. 2, the OIS lens 116 is disposed on the optical axis 300, and the OIS lens 116 is driven integrally with the OIS base 120. As a result, when the movement of the lens barrel 100 due to camera shake is detected, the OIS base 120 is driven in the direction perpendicular to the optical axis with respect to the OIS lens holding frame 118 according to the camera shake, thereby imaging the image sensor 109. The imaging position on the surface changes, and image degradation due to camera shake can be corrected.

  The OIS base 120 is provided with a shaft 120a. The OIS lens assembly 122 is provided with a hole 122a into which the shaft 120a is inserted. The OIS lens assembly 122 is configured to be rotatable with the shaft 120a inserted into the hole 122a. . With such a configuration, the OIS lens assembly 122 has a first state in which the OIS lens 116 is positioned on the optical axis 300 and a second state in which the OIS lens 116 is retracted below the optical axis 300. You can move between.

  4 and 5 are schematic views showing a state in which the OIS lens group 114 is viewed from the image sensor 109 side. 4 shows a first state in which the OIS lens 116 is positioned on the optical axis 300, and FIG. 5 shows a second state in which the OIS lens 116 has been retracted below the optical axis 300. . As shown in FIGS. 4 and 5, the OIS lens assembly 122 rotates about the shaft 120a, so that the OIS lens assembly 122 is set to the position of the first state and the second state.

  The holder 126 is fixed to the OIS base 120 in a state where the shaft 120a is inserted into the hole 122a of the OIS lens assembly 122, and functions to prevent the OIS lens assembly 122 from being detached from the shaft 120a. The spring 124 is formed of a string spring and is inserted into a boss 122b provided with a hole 122a, and the OIS lens assembly 122 is directed in the first state (the direction of the arrow A1 in FIGS. 4 and 5). Energize.

  As shown in FIGS. 3, 4, and 5, the OIS base 120 is provided with an inclined surface 120a, and the OIS lens assembly 122 is in contact with the inclined surface 120a. The inclined surface 120a is configured such that the height from the OIS base 120 toward the image sensor 109 increases as the distance from the optical axis 300 increases. Thereby, the OIS lens assembly 122 moves to the image sensor 109 side by the inclined surface 120a as it shifts from the first state to the second state.

  FIG. 6 is a schematic diagram illustrating how the hole 122a of the OIS lens assembly 122 is inserted into the shaft 120a of the OIS base 120. When the hole 122a is inserted into the shaft 120a, the protrusion 122d of the OIS lens assembly 122 contacts the inclined surface 120a. The OIS lens assembly 122 is biased toward the OIS base 120 by a spring 124, and the protrusion 122d is always in contact with the inclined surface 120a. In other words, the spring 124 urges the OIS lens assembly 122 in the rotation direction about the shaft 120a and also urges the OIS lens assembly 122 in the optical axis direction. Accordingly, as the state shifts from the first state to the second state, the protrusion 122d of the OIS lens assembly 122 moves up the inclined surface 120a, and the OIS lens assembly 122 moves to the image sensor 109 side. In addition, the inclined surface 120a restricts the amount of movement of the OIS lens assembly 122 in the optical axis direction, and after moving a predetermined amount, the OIS lens assembly 122 is parallel to the rotational direction (a direction orthogonal to the optical axis). Only) is configured to move.

  The outer peripheral surface of the retractor guide 128 is engaged with the inner peripheral surface 118b of the OIS lens holding frame 118 so as to be rotatable. As shown in FIG. 3, the retractor guide 128 is provided with three projections 128a, 128b, and 128c toward the image sensor 109 side. The three protrusions 128a, 128b, and 128c are inserted into holes 118a provided in the OIS lens holding frame 118, and can be engaged with the OIS base 120 and the OIS lens assembly 122.

  Of the three protrusions 128a, 128b, and 128c, the protrusions 128a and 128b have a function of suppressing movement of the OIS base 120 relative to the OIS lens holding frame 118. Further, the protrusion 128c has a function of rotating the OIS lens assembly 122 between the first state and the second state. FIG. 7 is a schematic diagram showing a state in which the OIS lens group 110 is viewed from the image sensor 109 side, and the OIS lens assembly 122 moves from the first state to the second state by the rotation of the retractor guide 128. The OIS base 120 is shown fixed to the OIS lens holding frame 118.

  FIG. 7A shows a state in which the OIS lens assembly 122 is located in the first state. In this state, the OIS lens 116 is positioned on the optical axis by the biasing force of the spring 124. When the retractor guide 128 rotates counterclockwise from the state shown in FIG. 7A, the protrusion 128c of the retractor guide 128 is provided outside the OIS lens assembly 122 as shown in FIG. 7B. Abuts against the protrusion 122c. When the retractor guide 128 further rotates counterclockwise from this state, the protrusion 122c is pushed by the protrusion 128c, and the OIS lens assembly 122 rotates toward the second state. Then, as shown in FIG. 7C, when the retractor guide 128 rotates to the counterclockwise end, the OIS lens assembly 122 rotated by being pushed by the protrusion 128c reaches the second position. Since the protrusion 122d of the OIS lens assembly 122 is in contact with the inclined surface 120a, the OIS lens assembly 122 moves in the optical axis direction toward the image sensor 109 as the state transitions from the first state to the second state.

  Further, when the retractor guide 128 rotates counterclockwise, the OIS base 120 is fixed to the OIS lens holding frame 118 by the protrusions 128a and 128b. As shown in FIGS. 7A to 7C, the OIS base 120 is provided with a protruding portion 120b having an outer diameter larger than that of the surroundings. The outer diameter of the projecting portion 120b matches the inner diameter of the protrusions 128a and 128b. When the retractor guide 128 rotates counterclockwise, the angular positions of the protrusion 120b and the protrusions 128a and 128b coincide, and the outer diameter of the protrusion 120b is held by the inner diameter of the protrusions 128a and 128b.

  FIG. 8 is a schematic diagram showing an enlarged view of a region B surrounded by a one-dot chain line in FIG. 7, and FIGS. 8A, 8B, and 8C are respectively the same as FIG. ), FIG. 7B, and FIG. 7C. FIG. 8D is a schematic diagram illustrating a state in which the protrusion 128b and the protrusion 120b are viewed from the direction of the arrow A2 in FIG.

  As shown in FIG. 8D, a protrusion 128d protruding toward the optical axis 300 is provided at the tip of the protrusion 128b. Similarly, a protrusion 128d protruding toward the optical axis side is provided at the tip of the protrusion 128a. A surface 128e on the subject side of the protrusion 128d coincides with a position of a surface 120c on the image sensor 109 side of the protrusion 120b.

  In the state shown in FIGS. 7A and 8A, the outer diameter of the protrusion 120b and the inner diameter of the protrusions 128a and 128b are not in contact with each other. Therefore, the OIS base 120 can move in two directions orthogonal to the optical axis. Thereby, as described above, camera shake correction is performed by the movement of the OIS base 120.

  As shown in FIGS. 7B and 8B, when the retractor guide 128 rotates counterclockwise (in the direction of the arrow A4), the optical axis of the outer diameter of the protrusion 120b and the inner diameter of the protrusions 128a and 128b is changed. The angular position around the center overlaps, and the outer diameter of the protrusion 120b and the inner diameter of the protrusions 128a and 128b begin to abut. Thereby, the OIS base 120 is held by the retractor guide 128 in a direction orthogonal to the optical axis 300. Further, the object-side surface 128e of the projection 128d and the surface 120c of the protruding portion 120b on the image sensor 109 side come into contact with each other, and the movement of the OIS base 120 toward the image sensor 109 is restricted.

  As shown in FIGS. 7C and 8C, when the retractor guide 128 rotates to the counterclockwise end, the outer diameter of the protrusion 120b and the inner diameter of the protrusions 128a and 128b are completely in contact with each other. It will be in the state. When the outer diameter of the protrusion 120b and the inner diameters of the protrusions 128a and 128b come into contact with each other, the OIS base 120 is held by the retractor guide 128 in a direction orthogonal to the optical axis 300. Since the outer diameter of the retractor guide 128 is pivotably engaged with the inner diameter of the OIS lens holding frame 118, when the OIS base 120 is held by the retractor guide 128 in a direction perpendicular to the optical axis, As a result, the OIS base 120 is held by the OIS lens holding frame 118 in a direction orthogonal to the optical axis.

  Further, in the state shown in FIGS. 7C and 8C, the surface 128e on the subject side of the protrusion 128d and the surface 120c on the image sensor 109 side of the protrusion 120b abut. Thereby, the protrusion 128d and the OIS base 120 are engaged. The subject side of the OIS base 120 is always in contact with the image sensor 109 side of the OIS lens holding frame 118. Accordingly, when the protrusion 128d and the OIS base 120 are engaged, the movement of the OIS base 120 toward the image sensor 109 is restricted. Therefore, in the state shown in FIGS. 7C and 8C, the OIS base 120 is fixed to the OIS lens holding frame 118 in both the optical axis direction and the direction orthogonal to the optical axis. Become.

  Accordingly, it is possible to prevent the OIS base 120 from moving inside the lens barrel 200 when retracted, and the OIS lens 116 is fixed in a configuration in which the OIS lens 116 is retracted from the optical axis 300 when retracted. It can be stably held in a state.

  Since the OIS base 120 needs to move in two directions (up, down, left, and right) perpendicular to the optical axis at the time of camera shake correction (OIS), positioning is performed only by the force of the magnets 134 and 136, and the force of the magnets 134 and 136 It is possible to move freely in two directions perpendicular to the optical axis. However, since the OIS lens assembly 122 is pushed in the rotating direction by the retractor guide 128 when retracted, the OIS base 120 is not fixed to the OIS lens holding frame 118 by the retractor guide 128. It will move and will interfere with the evacuation operation. In the present embodiment, when the OIS lens 116 is retracted, the OIS base 120 is fixed to the OIS lens holding frame 118, so that the OIS lens 116 can be retracted stably.

  When shifting from the collapsed time to the retracted time, the operation opposite to that described above is performed. In this case, when the retractor guide 128 rotates clockwise from the state shown in FIG. 7C, the OIS lens assembly 122 rotates toward the first state by the urging force of the spring 124. When the state returns to the state of FIG. 7A, the OIS lens 116 returns to the position on the optical axis 300. 7A, the protrusion 120b and the protrusions 128a and 128b are disengaged, and the OIS base 120 can move in a direction perpendicular to the optical axis 300 with respect to the OIS lens holding frame 118. Become.

  As described above, according to the configuration of the present embodiment, the OIS lens assembly 122 can be rotated between the first position and the second position by the rotation of the retractor guide 128. Further, the OIS base 120 can be fixed to the OIS lens holding frame 118 by the rotation of the retractor guide 128, and the fixing can be released.

  Further, by using the inclined surface 120a to move the OIS lens assembly 122, it is possible to perform not only the retraction operation in the rotation direction but also the retraction operation in the front-rear direction (optical axis direction) at the same time. This makes it possible to further reduce the overall length of the lens barrel when retracted.

  Next, a configuration for rotating the retractor guide 128 will be described. As shown in FIG. 3, the protrusion 128c of the retractor guide 128 is provided with an inclined surface 128f. The retractor guide 128 is urged by the urging force of the springs 130 and 132 so as to rotate about the optical axis 300 in the direction of the arrow A3 shown in FIGS.

  FIG. 9 shows a state in which the protrusion 107a protruding from the fixed frame 107 contacts the inclined surface 128f of the retractor guide 128 during the retracting process. When the OIS lens group 114 moves to the image sensor 109 side as the lens barrel is retracted, the protrusion 107a protruding from the fixed frame 107 contacts the inclined surface 128f of the retractor guide 128, and the OIS lens group 110 moves to the image sensor 109 side. As a result, the retractor guide 128 rotates in the direction opposite to the arrow A3 shown in FIGS. 4 and 5 by the component of the force received by the inclined surface 128f from the protrusion 107a. As a result, the retractor guide 128 can be rotated in the direction of arrow A4 in FIGS. 7A to 7C when shifting from the retracted state to the retracted state.

  On the other hand, when shifting from the retracted state to the retracted state, the retractor guide 128 rotates about the optical axis 300 in the direction of arrow A4 shown in FIGS. 4 and 5 by the biasing force of the springs 130 and 132. Therefore, as the inclined surface 128f moves to the subject side, it rotates in the direction of arrow A4 shown in FIG. 7, and returns to the state shown in FIG. As a result, the OIS lens assembly 122 returns to the first position, and the OIS base 120 is not fixed to the OIS lens holding frame 118.

  As described above, according to the present embodiment, the camera shake correction OIS lens 116 is retracted from the optical axis 300 and moved in the direction of the optical axis 300 when retracted. Can be prevented. Therefore, it is possible to minimize the total length of the lens barrel 200 when retracted.

  Further, since the OIS base 120 can be fixed to the OIS lens holding frame 118 at the time of retracting, the OIS base 120 can be fixed to the OIS lens holding frame 118 even when power to the magnets 134 and 136 is turned off at the time of retracting. It is possible to deter moving against.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 100 Lens barrel 108 1st group lens 110 2nd group lens 112 3rd group lens 116 OIS lens 118 OIS lens holding frame 120 OIS base 120a Inclined surface 120a Axis 122 OIS lens assembly 128 Retract guide

Claims (14)

A lens group that moves in the optical axis direction when retracted;
A camera shake correction lens movable in a direction perpendicular to the optical axis;
A correction lens assembly that is mounted with a camera shake correction lens, retracts the camera shake correction lens from the optical axis when the lens group is retracted, and moves the camera shake correction lens in a direction along the optical axis;
A lens barrel comprising: A base portion that rotatably supports the correction lens assembly about an axis parallel to the optical axis;
The lens barrel according to claim 1, wherein the correction lens assembly revolves around the axis to retract the camera shake correction lens from the optical axis. The base portion includes an inclined surface with which the correction lens assembly abuts.
The correction lens assembly moves along the inclined surface when rotating about the axis, thereby moving the camera shake correction lens in a direction along the optical axis. The lens barrel according to claim 1 or 2. A holding frame that holds the base portion so as to be movable in a direction perpendicular to the optical axis at the time of releasing the collapse;
A fixing member that is rotatably supported with respect to the holding frame, and fixes the base portion to the holding frame at the time of the retraction;
The lens barrel according to claim 1, further comprising:   The fixing member holds the outer periphery of the base portion by rotating at the time of retracting, thereby fixing the base portion to the holding frame in a direction perpendicular to the optical axis. Item 5. The lens barrel according to Item 4.   The fixing member holds the surface orthogonal to the optical axis of the base portion by rotating at the time of retracting, thereby fixing the base portion to the holding frame in the optical axis direction. The lens barrel according to claim 4.   The lens barrel according to any one of claims 4 to 6, wherein the fixing member rotates the correction lens assembly about the axis by rotating at the time of retracting. A lens group that is included in an imaging optical system that forms an optical image of a subject and moves in the optical axis direction when retracted;
An imaging device having an imaging surface on which an optical image of a subject is formed by the imaging optical system, and converting the optical image into an electrical signal;
A camera shake correction lens included in the imaging optical system and movable in a direction perpendicular to the optical axis;
A correction lens assembly that is mounted with a camera shake correction lens, retracts the camera shake correction lens from the optical axis when the lens group is retracted, and moves the camera shake correction lens in a direction along the optical axis;
An imaging apparatus comprising: A base portion that rotatably supports the correction lens assembly about an axis parallel to the optical axis;
The imaging apparatus according to claim 8, wherein the correction lens assembly retreats the camera shake correction lens from the optical axis by rotating about the axis. The base portion includes an inclined surface with which the correction lens assembly abuts.
The correction lens assembly moves along the inclined surface when rotating about the axis, thereby moving the camera shake correction lens in a direction along the optical axis. The imaging device according to claim 8 or 9. A holding frame that holds the base portion so as to be movable in a direction perpendicular to the optical axis at the time of releasing the collapse;
A fixing member that is rotatably supported with respect to the holding frame, and fixes the base portion to the holding frame at the time of the retraction;
The imaging apparatus according to claim 8, further comprising:   The fixing member holds the outer periphery of the base portion by rotating at the time of retracting, thereby fixing the base portion to the holding frame in a direction perpendicular to the optical axis. Item 12. The imaging device according to Item 11.   The fixing member holds the surface orthogonal to the optical axis of the base portion by rotating at the time of retracting, thereby fixing the base portion to the holding frame in the optical axis direction. The imaging device according to claim 11.   The imaging device according to claim 11, wherein the fixing member rotates the correction lens assembly about the axis by rotating when the retracted.

Images