Image stabilization device, lens barrel, and imaging device

Abstract

This device provides a runout correction device that is advantageous in that it reduces the number of parts while also reducing the occurrence of guide member detachment when the product is subjected to impact. [Solution] The shake correction device comprises a movable group that holds a lens and is movable in a direction perpendicular to the optical axis, a base that movably holds the movable group, a plurality of rolling balls arranged between the movable group and the base, and a stopper structure that prevents the rolling balls from falling out. The stopper structure comprises a plurality of claw portions formed on the side of the movable group where the base is located, and a flange portion formed on the base at a position facing the claw portions when viewed along the optical axis.

Description

Technical Field

[0001] The present invention relates to a shake correction device, a lens device including the same, and an imaging device.

Background Art

[0002] Conventionally, a lens device may be equipped with a shake correction device for correcting the influence of camera shake. Some shake correction devices include a shake correction lens and an electromagnetic actuator using a magnet and a coil as a drive unit for moving the shake correction lens in a direction orthogonal to the optical axis. Since the shake correction lens requires a minute movement, a ball may be used in a guide portion for the purpose of improving the drive performance during the operation of the correction lens. (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, in order to prevent the movable unit from being separated from the base member in the optical axis direction and the ball from falling off when the camera receives a strong impact such as dropping, a pressing plate is provided. Since the pressing plate is arranged on the opposite side of the direction in which the ball is arranged in the optical axis direction of the movable unit, the shake correction device has become large in the optical axis direction. Further, since the pressing plate is fixed to the base member and the fixing portion is arranged on the outer peripheral side of the movable unit, it has also become large in the direction orthogonal to the optical axis.

[0005] Therefore, an object of the present invention is to provide a shake correction device that is advantageous in reducing the occurrence of dropout of a guide member when the product is impacted while reducing the number of parts, for example.

[0006] To solve the above problems, the present invention provides a movable group that holds a lens and is movable in a direction perpendicular to the optical axis, a base that movably holds the movable group, a plurality of rolling balls disposed between the movable group and the base, and a stopper structure that prevents the rolling balls from falling out, wherein the stopper structure comprises a plurality of claw portions formed on the side of the movable group on which the base is located, and a flange portion formed on the base at a position facing the claw portions when viewed along the optical axis. [Effects of the Invention]

[0007] According to the present invention, for example, it is possible to provide a runout correction device that is advantageous in that it reduces the occurrence of guide members falling off when the product is subjected to impact, while reducing the number of parts. [Brief explanation of the drawing]

[0008] [Figure 1] This is a cross-sectional view of the lens barrel of this embodiment. [Figure 2] This is an exploded perspective view of the vibration isolation unit of this embodiment. [Figure 3] This is an exploded perspective view of the vibration isolation unit of this embodiment. [Figure 4] This is a cross-sectional view of the vibration isolation unit. [Figure 5] This is a diagram showing the stopper structure of the vibration isolation unit as viewed from the direction of the subject. [Figure 6] This figure shows the detailed shape of the flange portion of the base member. [Figure 7] This diagram shows the state of the shift lens barrel when it is assembled into the base member. [Figure 8] This is a front view of the vibration isolation unit after assembly is complete. [Figure 9] This is a cross-sectional view of a vibration isolation unit including a damper injection recess and damper material. [Figure 10] This figure shows an example of the configuration of an imaging device. [Modes for carrying out the invention]

[0009] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Throughout the drawings, identical or corresponding parts are denoted by the same reference numerals, and redundant descriptions are omitted.

[0010] <Embodiment> Figure 1 is a cross-sectional view of the lens barrel 100 of this embodiment. The lens barrel 100 includes a variable magnification optical system (zoom lens system) comprising five lens units L1 to L5, each containing at least one optical element.

[0011] The first lens group unit L1 is immobile in the direction along the optical axis (hereinafter referred to as the optical axis direction). The second lens group unit L2, the third lens group unit L3, and the fifth lens group unit L5 perform zooming by moving in the optical axis direction. The third lens group unit L3 has an image stabilization unit 30 that shifts in a direction perpendicular to the optical axis of the imaging optical system to reduce image shake. The image stabilization unit 30 will be described later.

[0012] The L4 lens unit (4 groups) corrects image plane fluctuations associated with zooming by moving along the optical axis. Furthermore, the L4 lens unit also functions as a focusing lens group, adjusting the focus by moving along the optical axis.

[0013] The 1st group lens holding frame 1 holds the 1st group lens unit L1. The 1st group lens holding frame 1 is coupled to the front fixed lens barrel 7 and fixes the 1st group lens unit L1 in a predetermined position. The 2nd group moving frame 2 holds the 2nd group lens unit L2. The 3rd group moving frame 3 holds the 3a group lens unit L3a. The vibration isolation unit 30 holds the vibration isolation lens unit L3b. The 4th group moving frame 4 holds the 4th group lens unit L4. The 5th group moving frame 5 holds the 5th group lens unit L5.

[0014] The light intensity adjustment unit 6 is coupled to the central fixed lens barrel 8. The light intensity adjustment unit 6 adjusts the light intensity by changing the aperture diameter of the optical system by moving the aperture blades in a plane perpendicular to the optical axis using a drive unit (not shown).

[0015] The three-group moving frame 3 is integrated with the vibration-proof unit 30 and is supported so as to be movable in the optical axis direction by a three-group guide bar 10 whose both ends are held by the middle fixed lens barrel 8 and the rear fixed lens barrel 9. The three-group moving frame 3 is moved in the optical axis direction by an actuator such as a stepping motor 11. The stepping motor 11 has a lead screw coaxial with the rotating rotor, and a rack 12 attached to the three-group moving frame 3 meshes with the lead screw and is driven in the optical axis direction by the rotation of the rotor.

[0016] The imaging device 13 is an imaging unit that photoelectrically converts a subject image formed by the first-group lens unit L1 to the fifth-group lens unit L5. That is, the imaging device 13 receives an image formed by the first-group lens unit L1 to the fifth-group lens unit L5. The imaging device 13 is adhesively fixed to the mounting plate 14.

[0017] The vibration-proof unit 30 of the present embodiment will be described with reference to FIGS. 2 and 3. FIGS. 2 and 3 are exploded perspective views of the vibration-proof unit 30 of the present embodiment. FIG. 2 is an exploded perspective view seen from the direction of the imaging device 13, and FIG. 3 is an exploded perspective view seen from the subject direction.

[0018] The shift lens barrel 301 (movable group) holds the vibration-proof lens unit L3b and is a movable member movable in a plane orthogonal to the optical axis. The shift lens barrel 301 is movable with respect to a base member 302 fixed to the three-group moving frame 3. A drive coil 303 is fixed to the shift lens barrel 301. The drive coil is soldered to a flexible printed board 309 fixed to the shift lens barrel 301.

[0019] The base member 302 holds the shift lens barrel 301 so as to be movable in a direction orthogonal to the optical axis. A magnet 304 and a yoke 305 are fixed to the base member 302. When the drive coil 303 is energized via the flexible printed board 309, a Lorentz force is generated between the drive coil 303 and the magnet 304. Thereby, a driving force is applied to the shift lens barrel 301, and the shift lens barrel 301 is driven.

[0020] The base member 302 has a ball-holding recess 302d in which rolling balls are arranged. Multiple rolling balls 306 are arranged between the shift lens barrel 301 and the base member 302. The rolling balls 306 are held between the shift lens barrel 301 and the base member 302 by the tensile force of a spring 307 that is hooked onto the shift lens barrel 301 and the base member 302. The tensile force of the spring 307 allows the shift lens barrel 301 to be driven in the optical axis direction without any play. In other words, the rolling balls 306 are guide members used to move the shift lens barrel 301 in a direction perpendicular to the optical axis relative to the base member 302.

[0021] Furthermore, the base member 302 has two damper injection recesses 302e into which damper material is injected. A pin 308 (rotation range limiting member) that is inserted into the damper material is fixed to the shift lens barrel 301. Since the shift lens barrel 301 is driven while inserted into the damper material, the effects of vibrations during optical axis movement of the 3-group moving frame 3 by the actuator such as the stepping motor mentioned above can be suppressed.

[0022] As explained above, the rolling ball 306 is held between the shift barrel 301 and the base member 302 by a spring 307. If the vibration isolation unit 30 is subjected to an impact stronger than the tensile force of the spring 307, the shift barrel 301 may move away from the base member 302, and the rolling ball 306 may fall out of the ball-holding recess 302d. For this reason, it is necessary to prevent the shift barrel 301 and the base member 302 from separating. The shift barrel 301 and the base member 302 are formed with stopper claws 301a (claw portion) and flange portion 302a that function as anti-floating stopper structures to prevent the rolling ball 306 from falling out.

[0023] Next, using Figures 4 to 8, we will explain the stopper structure that prevents separation between the shift lens barrel 301 and the base member 302.

[0024] Figure 4 is a cross-sectional view of the vibration isolation unit 30. This figure is a cross-sectional view of the vibration isolation unit 30 taken from a plane parallel to the optical axis. Figure 5 is a view of the stopper structure of the vibration isolation unit 30 from the direction of the subject. Figure 6 is a detailed view of the flange portion 302a of the base member 302. Figure 7 is a view of the state of the shift lens barrel 301 when it is assembled into the base member 302. Figure 8 is a front view of the vibration isolation unit 30 after assembly is complete.

[0025] As mentioned above, rolling balls 306 are sandwiched between the shifting lens barrel 301 and the base member 302. Stopper claws 301a are formed on the side of the shifting lens barrel 301 where the rolling balls 306 are located in the optical axis direction, that is, on the side where the base member 302 is located. The stopper claws 301a are shaped to protrude in four places outward from the cylindrical shape that holds the vibration-damping lens unit L3b. In other words, the stopper claws 301a are shaped to protrude outward with respect to the optical axis.

[0026] A flange portion 302a is formed on the base member 302 at a position opposite the stopper claw 301a in the optical axis direction. Here, as an example, the inner shape of the flange portion 302a is octagonal, as shown by the dashed line in Figure 5. The length x1 to the outer end of the stopper claw 301a and the length x2 to the inner end of the flange portion 302a are set as follows so that they can face each other even when the shifting lens barrel 301 is shifted by x3 during vibration isolation. x2 + x3 <x1 Here, the length x1 to the outer end of the stopper claw 301a is the length from the optical axis O to a straight line perpendicular to the side of the stopper claw 301a (as shown in Figures 4 and 5). If the outer diameter of the stopper claw 301a is in the shape of a circular arc centered on the optical axis O, then x1 may be the length of its radius. The length x2 to the inner end of the flange portion 302a is the length from the optical axis O to a straight line perpendicular to the side of the flange portion 302a (as shown in Figures 4 and 5), and if the inner diameter of the flange portion 302a is a circle or arc centered on the optical axis O, then x3 may be the length of its radius. x3 is the amount of movement of the shift barrel 301 in the direction perpendicular to the optical axis.

[0027] Therefore, when an impact greater than the pulling force of the spring 307 is applied to the vibration-proof unit 30 and the shift lens barrel 301 moves in a direction away from the base member 302, the stopper claw 301a and the flange portion 302a come into contact with each other and the movement is restricted. The clearance in the optical axis direction between the stopper claw 301a and the flange portion 302a in the normal use state is set to z1, and the clearance between the end surface of the ball holding recess 302d and the ball contact surface of the shift lens barrel 301 is set to z2. The clearances z1 and z2 are each set to be less than half of the ball diameter z3 (that is, less than the radius of the rolling ball 306). That is, from the above relationship, z1 + z2 < z3. Although it is preferable that the clearances z1 and z2 are each set to be less than half of the ball diameter z3, it is not limited thereto, and it is sufficient that z1 + z2 < z3 is satisfied. When an impact is applied to the vibration-proof unit 30, the shift lens barrel 301 moves by a maximum of z1 in the optical axis direction. At this time, the clearance between the end surface of the ball holding recess 302d in the optical axis direction and the shift lens barrel 301 changes to z1 + z2, but since it is smaller than the ball diameter z3, the rolling ball 306 does not fall off from the ball holding recess 302d.

[0028] By forming the stopper shape on the shift lens barrel 301 and the base member 302 in this way, the number of stopper parts can be reduced. Also, thereby, the shape for fixing the stopper parts is no longer necessary, so that it can be miniaturized in the radial direction. Furthermore, by forming the stopper claw 301a of the shift lens barrel 301 in the same direction as the direction in which the rolling ball 306 is arranged in the optical axis direction, it can be miniaturized in the optical axis direction as well.

[0029] The inside of the flange portion 302a faces the cylindrical portion that holds the vibration-damping lens unit L3b of the shift lens barrel 301, as shown in Figure 4. In Figure 6, the outer shape 301c of the cylindrical portion of the shift lens barrel 301 is shown by a dashed line. Inside the flange portion 302a, a shift mechanism end 302b (movement range restricting portion) is formed, which restricts the movement range of the shift lens barrel 301 in the direction perpendicular to the optical axis. The shift mechanism end 302b is part of the flange portion 302a, and when assembled, the shift mechanism end 302b and the stopper claw 301a overlap when viewed from the direction along the optical axis. Here, as an example, the shift mechanism ends 302b are arranged in eight locations in the up, down, left, right, and diagonal directions. During vibration damping drive, the movement range of the shift lens barrel 301 is restricted when the cylindrical portion of the shift lens barrel 301 comes into contact with the shift mechanism end 302b. The distance from the optical axis between adjacent shift mechanism ends 302b must be wider than that of the shift mechanism end 302b so as not to restrict the range of movement. For this reason, the internal shape of the flange portion 302a is an octagon with the shift mechanism ends and eight other sides, as shown by the dashed lines in Figure 6.

[0030] Therefore, in this embodiment, an insertion portion 302c for inserting the stopper claw 301a is formed between adjacent shift mechanism ends where there is ample space. By providing the insertion portion for the stopper claw 301a in a location where there is ample space, it is possible to suppress the radial enlargement of the vibration damping unit 30.

[0031] In this embodiment, an insertion portion 302c is formed, but it is also possible to omit the insertion portion 302c and have a structure that allows insertion from the corners of the octagon. Specifically, as described above, the distance from the optical axis between adjacent shift mechanism ends 302b is wider than that of the shift mechanism end 302b so as not to restrict the range of movement. For this reason, for example, by making the width of the stopper claw 301a smaller than shown in the figure, the stopper claw 301a can be inserted from the corners of the octagon without providing an insertion portion 302c.

[0032] Furthermore, in this embodiment, eight shift mechanism ends 302b are provided in the up, down, left, right, and diagonal directions, but they may be provided only in the up, down, left, and right directions, or only in the diagonal directions (four locations). More than eight locations may also be provided. Additionally, the inner shape of the flange portion 302a may be circular, and the circumference may be used as the shift mechanism end 302b, or a portion of the circumference may be straight, and this straight portion may be used as the shift mechanism end 302b. Providing eight shift mechanism ends 302b in the up, down, left, right, and diagonal directions is advantageous in terms of space reduction, i.e., miniaturization, compared to the case of four locations. It is also advantageous in terms of ease of manufacture compared to a circular shape.

[0033] Furthermore, in this embodiment, as an example, there are four stopper claws 301a, but they only need to be placed in three or more locations, and may even be more than four. Also, the number of insertion parts 302c should be equal to or greater than the number of stopper claws 301a.

[0034] Next, the method for assembling the shift lens barrel 301 into the base member 302 will be explained using Figure 7. This figure shows the shift lens barrel 301 and the base member 302 as viewed from the image sensor 13 side. First, Figure 7(A) shows the state in which the stopper claw 301a is inserted from the insertion part 302c. As shown in this figure, with the positions of the stopper claw 301a and the insertion part 302c aligned as viewed from the image sensor 13 side, the shift lens barrel 301 is moved in the direction of the optical axis and the stopper claw 301a is inserted into the flange part 302a. At this time, the pin insertion hole 301b in which the pin 308 is fixed is located outside the damper injection recess 302e in which the damper material is injected, as viewed from the image sensor side. After that, the shift lens barrel 301 is rotated around the optical axis to the state shown in Figure 7(B). Figure 7(B) shows the state in which the stopper claw 301a has been inserted. At this time, the pin insertion hole 301b is located inside the damper injection recess 302e when viewed from the image sensor side, and the stopper claw 301a is hidden by the flange portion 302a. In other words, as shown in Figure 4, the stopper claw 301a and flange portion 302a are in opposing positions in the optical axis direction, so they function as a stopper in the floating direction.

[0035] After moving to the state shown in Figure 7(B), the spring 307 is attached to the shift tube 301 and the base member 302 in three places, the pin 308 is inserted into the pin insertion hole 301b, and fixed with adhesive 310 such as UV adhesive. Then, the damper material 311 is injected into the damper injection recess 302e, completing the assembly. Figure 8 shows the completed assembly state.

[0036] Figure 9 is a cross-sectional view of the vibration isolation unit 30, including the damper injection recess 302e and the damper material 311. This figure shows a cross-sectional view along line AA in Figure 8. The pin 308 has a shape that extends in the direction of the optical axis, and its tip is located inside the damper injection recess 302e. The tip is also in contact with the gel-like damper material 311 injected into the damper injection recess 302e. As described above, by bringing the pin 308, which is integrated with the shift lens barrel 301, into contact with the damper material, the influence of vibrations during the movement of the moving frame on the vibration isolation drive can be suppressed.

[0037] Here, as shown in Figure 7(A), the shift barrel 301 can be attached to and detached from the base member 302 when the pin insertion hole 301b is located outside the damper injection recess 302e. As described above, the tip of the pin 308 is located inside the damper injection recess 302e. Therefore, when the pin 308 is fixed in the pin insertion hole 301b of the shift barrel 301, the pin 308 and the inner wall of the damper injection recess 302e come into contact, and it is not possible to rotate it to the attachment / detachment position shown in Figure 7(A). In other words, in the operating state with the pin 308 fixed to the shift barrel 301, the pin 308 acts as a rotation restrictor for the shift barrel 301. To put it another way, the pin 308 prevents the positions of the stopper claw 301a and the insertion part 302c from overlapping when viewed from the direction along the optical axis due to the relative rotation of the shift barrel 301 and the base member 302. Therefore, even when the vibration isolation unit 30 is subjected to an impact that rotates it around the optical axis, the shift lens barrel 301 is prevented from falling off the base member 302.

[0038] Due to the above configuration, the pin 308 has a length that allows it to contact at least the inner wall of the damper injection recess 302e formed in the base member 302 when the shift barrel 301 and the base member 302 are rotated relative to each other. In other words, it has a length that allows it to contact the base member 302 at a position where the stopper claw 301a and the insertion portion 302c overlap when viewed from a direction along the optical axis.

[0039] The pin 308 may also be fixed to the base member 302. In this case, the damper injection recess 302e is provided on the shift lens barrel 301 side, and the pin 308 has a length that contacts the shift lens barrel 301 at a position where the stopper claw 301a and the insertion portion 302c overlap when viewed from the direction along the optical axis.

[0040] Furthermore, as the rotation range limiting member, it is possible to use a member that can be fixed to the shift lens barrel 301 or the base member 302 and has a predetermined length in the optical axis direction.

[0041] By adopting the structure described above, the number of parts can be reduced, making the device smaller while preventing the rolling balls from falling off when subjected to impacts such as drops. <Embodiment of an imaging device> Figure 10 shows an example of the configuration of the imaging device 300. An imaging device that enjoys the effects of the present invention can be realized by an imaging device 300 having the lens barrel 100 of the above embodiment and a camera body 200 that holds an image sensor 13 that receives light from the lens barrel 100. The imaging device is, for example, a digital video camera, but is not limited to this, and may also be a digital still camera or a digital SLR camera.

[0042] <Other Embodiments> Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of its gist.

[0043] This embodiment includes the following configuration. (Composition 1) A movable group that holds the lens and can move in a direction perpendicular to the optical axis, A base that movably holds the aforementioned movable group, A plurality of rolling balls are arranged between the movable group and the base, It has a stopper structure to prevent the rolling balls from falling out, The stopper structure is characterized by comprising a plurality of claw portions formed on the side of the movable group where the base is located, and a flange portion formed on the base at a position facing the claw portions when viewed along the optical axis.

[0044] (Configuration 2) A plurality of movement range restricting portions are formed on the inside of the flange portion and restrict the movement range of the movable group in a direction perpendicular to the optical axis, The runout correction device according to configuration 1, further comprising an insertion portion formed between adjacent movement range restricting portions for inserting the claw portion.

[0045] (Composition 3) The claw portion protrudes outward with respect to the optical axis, and the protruding claw portion and the movement range restricting portion overlap when viewed from a direction along the optical axis, as described in configuration 2 of the shake correction device.

[0046] (Composition 4) The vibration correction device according to configuration 2 or 3, characterized in that it has a rotation range limiting member fixed to either the movable group or the base, which prevents the positions of the claw portion and the insertion portion from overlapping when viewed from a direction along the optical axis as the movable group and the base rotate relative to each other.

[0047] (Composition 5) A damper injection recess is formed in either the movable group or the base, where a damper material is placed. The vibration correction device according to configuration 4, characterized in that the rotation range limiting member is a pin disposed inside the damper injection recess.

[0048] (Composition 6) The vibration correction device according to configuration 4 or 5, characterized in that the rotation range limiting member has a length such that it contacts either the movable group or the base at a position where the claw portion and the insertion portion overlap when viewed from a direction along the optical axis.

[0049] (Composition 7) The runout correction device according to any one of configurations 1 to 6, characterized in that the claw portion and the flange portion are arranged in a direction along the optical axis with a clearance less than or equal to the radius of the rolling ball.

[0050] (Composition 8) The vibration correction device according to any one of configurations 1 to 7, characterized in that the length from the optical axis to the outer end of the claw portion is longer than the sum of the length from the optical axis to the inner end of the flange portion and the amount of movement of the movable group in the direction perpendicular to the optical axis.

[0051] (Composition 9) The runout correction device according to any one of configurations 1 to 7, characterized in that the inner shape of the flange portion is octagonal.

[0052] (Composition 10) A lens barrel characterized by being equipped with a shake correction device described in any one of configurations 1 to 9.

[0053] (Composition 11) An imaging device characterized by comprising a lens barrel as described in configuration 10 and an image sensor that receives an image formed by the lens barrel. [Explanation of symbols]

[0054] L3b Vibration-damping lens unit 13 Image sensor 100 Lens barrel 200 Camera body 300 Imaging devices 301 Shift-type Telescope Tube 301a Stopper claw 301b Pin insertion hole 301c Cylindrical section outer shape 302 Base component 302a Flange section 302b Shift mechanism end 302c Insertion section 302d Ball-retaining recess 302e Damper injection recess 306 Rolling Ball 311 Damper material

Claims

1. A movable group that holds the lens and can move in a direction perpendicular to the optical axis, A base that movably holds the aforementioned movable group, A plurality of rolling balls are arranged between the movable group and the base, It has a stopper structure to prevent the rolling balls from falling out, The stopper structure is characterized by comprising a plurality of claw portions formed on the side of the movable group where the base is located, and a flange portion formed on the base at a position facing the claw portions when viewed along the optical axis.

2. A plurality of movement range restricting portions are formed on the inside of the flange portion and restrict the movement range of the movable group in a direction perpendicular to the optical axis, The runout correction device according to claim 1, further comprising an insertion portion formed between adjacent movement range restricting portions for inserting the claw portion.

3. The claw portion protrudes outward with respect to the optical axis, and the protruding claw portion and the movement range restricting portion overlap when viewed from a direction along the optical axis, as described in claim 2.

4. The vibration correction device according to claim 2, further comprising a rotation range limiting member fixed to either the movable group or the base, which prevents the positions of the claw portion and the insertion portion from overlapping when viewed from a direction along the optical axis as the movable group and the base rotate relative to each other.

5. A damper injection recess is formed in either the movable group or the base, where a damper material is placed. The vibration correction device according to claim 4, characterized in that the rotation range limiting member is a pin disposed inside the damper injection recess.

6. The vibration correction device according to claim 4, characterized in that the rotation range limiting member has a length such that it contacts either the movable group or the base at a position where the claw portion and the insertion portion overlap when viewed from a direction along the optical axis.

7. The runout correction device according to claim 1, characterized in that the claw portion and the flange portion are arranged in a direction along the optical axis with a clearance less than or equal to the radius of the rolling ball.

8. The vibration correction device according to claim 1, characterized in that the length from the optical axis to the outer end of the claw portion is longer than the sum of the length from the optical axis to the inner end of the flange portion and the amount of movement of the movable group in the direction perpendicular to the optical axis.

9. The runout correction device according to claim 1, characterized in that the inner shape of the flange portion is octagonal.

10. A lens barrel characterized by comprising a shake correction device according to any one of claims 1 to 9.

11. An imaging device comprising a lens barrel according to claim 10 and an image sensor that receives an image formed by the lens barrel.

Images