JP2010066690A - Lens barrel comprising vibration-proof device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens barrel capable of restraining resonance generated by the vibrational energy by driving of a vibration-proof device, when the lens barrel is constituted so that a lens group comprising the vibration-proof device can move in the optical axis direction along a guide bar. <P>SOLUTION: The lens barrel constituted so that the lens group, comprising the vibration-proof device, is movable in the optical axis direction, has a base member which holds the lens group comprising the vibration-proof device movably in the optical axis direction along the guide bar; and an energization member held on the outer periphery of the base member, wherein the energization member abuts against a member provided on the outer periphery of the base member, and makes the vibrational energy which is generated in driving of the vibration-proof device attenuate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lens barrel provided with a vibration isolator.

In a retractable lens barrel used in a conventional digital camera or the like, a mechanism for moving the lens held in the lens holder in the optical axis direction by rotation of the cam barrel is configured as follows.
For example, as shown in FIG. 14, the mechanism disclosed in Patent Document 1 includes a cam cylinder 101 having a cam groove, a lens 102 and a lens holder 103 having a cam pin.
When the cam barrel rotates, the cam pin that engages with the cam groove on the inner peripheral side of the cam barrel is guided by the straight key along the lift of the cam groove and moves in the optical axis direction. Move in the axial direction.
However, with a high-magnification lens barrel having a large number of lenses and a retractable lens barrel as in Patent Document 1, it is not always easy to match the optical axes of the lenses due to component errors, and the required optical accuracy is reduced. There were times when I was not satisfied.

For this reason, Patent Document 2 proposes a lens barrel as shown in FIG.
That is, in order to make the deviation of the optical axis as small as possible, a lens barrel is proposed in which guide bars 202a and 202b are provided from a lens holder 201 having a reference lens and moved along the guide bar to the optical axis. Yes.
Recently, in order to prevent image blur due to camera shake, which is likely to occur during hand-held shooting, there are an increasing number of cameras equipped with an anti-vibration device.
JP 2008-58581 A Japanese Patent No. 3688700

However, in order to realize a lens barrel that is a retractable lens barrel having a higher magnification and is equipped with an anti-vibration device, the lens group equipped with the anti-vibration device is also guided in addition to the configuration of Patent Document 2. An optical system that moves in the direction of the optical axis along the bar is required.
On the other hand, in such an anti-vibration device for a lens barrel, the amount of hand shake is detected, and the lens is moved so as to always correct it.
Since this vibration energy is quite large, a lens barrel in which a lens group equipped with a vibration isolator is simply supported by a guide bar cannot absorb this vibration energy generated by driving the vibration isolator and may cause resonance. Produce.

  In view of the above problems, the present invention is caused by vibration energy generated by driving a vibration isolator when a lens barrel including a lens group including the vibration isolator is movable along the guide bar in the optical axis direction. An object of the present invention is to provide a lens barrel that can suppress resonance.

In order to solve the above problems, the present invention provides a lens barrel including a vibration isolator configured as follows.
The lens barrel provided with the vibration isolator of the present invention is a lens barrel configured to be movable in the optical axis direction with respect to the lens group provided with the vibration isolator,
A base member for holding the lens group including the vibration isolator movably in the optical axis direction along the guide bar;
An urging member held on the outer periphery of the base member;
The biasing member is in contact with a member provided on the outer peripheral portion of the base member, and attenuates vibration energy generated when the vibration isolator is driven.
In the lens barrel provided with the vibration isolator of the present invention, the base member is supported by two guide bars,
The urging member can be urged in a direction in which a straight line connecting the installation positions of the two guide bars is rotated by 45 degrees or more in a plane direction in which the lens group including the vibration isolator moves. It is configured.
In the lens barrel provided with the vibration isolator of the present invention, the biasing member includes a spring and a pin movable in a radial direction biased by the spring.
Further, the lens barrel provided with the vibration isolator of the present invention is characterized in that the biasing member is configured to be able to contact a cam cylinder or a fixed cylinder provided on an outer peripheral portion of the base member. To do.
In the lens barrel having the vibration isolator of the present invention, the urging member is in contact with the first engaging portion for moving the base member provided in the cam barrel in the optical axis direction. It is configured to be able to contact.
Further, the lens barrel provided with the vibration isolator of the present invention has a pin member arranged in the vicinity of the support portion of the guide bar on the base member,
The cam cylinder is provided with a second engagement portion with which the pin member is engaged,
The first engagement portion and the second engagement portion have the same lift shape.
Further, the lens barrel provided with the vibration isolator of the present invention is a collapsible type lens barrel in which the lens barrel includes from the first group lens to the fourth group lens,
The base member is a third group base member that includes the anti-vibration device in a third group lens and holds the third group lens movably in the optical axis direction along the guide bar.

  According to the present invention, when a lens barrel that allows a lens group including a vibration isolator to move in the optical axis direction along the guide bar is configured, resonance caused by vibration energy generated by driving the vibration isolator is suppressed. It is possible to realize a lens barrel that can be used.

According to the above configuration, when the vibration isolator mounted on the lens group supported by the guide bar and movable in the optical axis direction is driven, the vibration energy of the device is attenuated and the vibration energy of the device is attenuated. It is possible to suppress the resonance caused by.
That is, as a vibration energy attenuating means for attenuating vibration energy generated when the vibration isolator is driven, an urging member held on the outer peripheral portion of the base member is used as a member provided on the outer peripheral portion of the base member. It is configured to abut.
Specifically, for example, as shown in FIG. 10, the third group sub-follower 32 is urged by a compression spring 33 to engage with a third group sub-cam groove 8h provided in the cam cylinder.
Such an urging member can be constituted by a spring and a pin movable in the radial direction urged by the spring.
According to such an urging member, it is possible to attenuate the vibration energy generated when the lens is driven by the vibration proofing device in order to correct the camera shake, and to suppress the resonance of the lens barrel caused by the vibration energy. It becomes possible.

At that time, the base member is configured to be supported by two guide bars,
The urging member can be urged in a direction in which a straight line connecting the installation positions of the two guide bars is rotated by 45 degrees or more in a plane direction in which the lens group including the vibration isolator moves. It is preferable to configure.
The reason is as follows. That is, there are minute backlashes in the main bar, the sub guide bar and the fitting hole so as to be slidable.
Due to such backlash, vibration is generated at a high frequency and there is a risk of causing resonance, but the vibration energy that causes this resonance is particularly large in the rotation direction around the main bar 2b.
Therefore, in order to effectively attenuate the vibration, it is preferable that the steadying direction (a direction orthogonal to the straight line connecting the main bar 2b and the sub guide bar 2c) is used as the biasing direction.
With the configuration as described above, when the lens group having the anti-vibration lens is moved along the guide bar to the optical axis, the vibration energy generated by the anti-vibration device can be absorbed by the biasing member.
As a result, it is possible to easily solve problems such as sound due to resonance of the entire lens barrel and difficulty in feedback control due to oscillation.

In the following, a lens barrel provided with a vibration isolator in an embodiment of the present invention will be described.
FIG. 1 is an exploded perspective view for explaining the configuration of a third group lens equipped with a vibration isolator in a retractable lens barrel having from the first group lens to the fourth group lens in the embodiment of the present invention. FIG. 2 is a top view of a third group lens on which the image stabilizer shown in FIG. 1 is mounted.
3 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line BB in FIG.

First, the configuration of the third group lens on which the image stabilizer in the embodiment of the present invention is mounted will be described with reference to FIGS.
The lens barrel of the present embodiment constitutes a collapsible barrel having a first group lens to a fourth group lens (see FIG. 5), and a vibration isolator is mounted on the third group lens.
The anti-vibration device mounted on the third group lens is configured to move the correction lens L3 in the first direction and the second direction within a plane perpendicular to the optical axis to correct image blur caused by camera shake or the like. Has been.
Here, the first direction refers to an angle change in a predetermined direction of the camera, and in this embodiment, refers to the upward direction shown in FIG.
Further, the second direction refers to an angle change perpendicular to a predetermined direction of the camera, and in this embodiment, refers to the upward left direction shown in FIG.
The correction lens L3 is independently driven and positioned by a dedicated drive unit and position detection unit in the first direction and the second direction, respectively.

1-4, 31 is a 3 group base member which can move to an optical axis on the basis of the below-mentioned guide bar.
A main bar 2b, which will be described later, is fitted to the fitting portions 31a and 31b, and the main bar 2b is configured to be slidable with respect to these fitting members.
It is preferable that the fitting portions 31a and 31b be separated as much as possible in the optical axis direction because the tilt of the vibration-proof lens with respect to the guide bar can be minimized.
On the other hand, a third group steady rest 31c that is fitted only in the width direction with a below-described sub guide bar is disposed substantially diagonally with the fitting portions 31a and 31b.
The third group steady rest 31c functions as a rotation stopper for the main bar, and is configured to be slidable with the sub guide bar.

Near the main bar, a third group main follower 31d (pin member) is provided. The third group main follower 31d (pin member) is engaged with a cam groove 8d (second engaging portion) described later, and is configured to be movable in the optical axis direction following the cam groove.
By disposing the third group main follower 31d in the vicinity of the support portion of the main bar 2b, the third group base member can be moved in the optical axis direction without twisting.
31e is a follower holding part that holds a later-described third group sub-follower 32 with a compression spring 33 interposed therebetween.
As shown in FIG. 2, the third group sub-follower 32 is arranged so as to be urged in a direction rotated by θ (θ> 45) degrees with respect to a straight line connecting the main bar 2b portion and the sub-guide bar 2c. .
As will be described later, the third group sub-follower 32 is engaged with the cam groove 8h of the cam cylinder 8 to attenuate the vibration energy generated when the lens is driven by the vibration isolator to correct the camera shake. It has a function of suppressing the resonance of the lens barrel caused by vibration energy.
The function of the third group sub-follower 32 will be described later.

The third group base member 31 includes recesses 31f, 31g, and 31h that hold three balls, which will be described later, and hook-shaped locking portions 31i, 31j, and 31k that lock the three tension springs 36.
Furthermore, holding portions 31l and 31m that hold position detection elements (hall elements) described later are provided.
Reference numeral 34 denotes a third group lens holder in which the correction lens L3 is held in the central lens holding portion 34a.
The third group lens holder 34 is provided with locking portions 34d, 34e, 34f each having a hook shape for locking the tension spring 36.
In addition, the outer periphery of the correction lens L3 has a first magnet 34b magnetized in two poles, and is also the outer periphery of the correction lens 2 at a position rotated 90 degrees from the first magnet 34b around the optical axis. The second magnet 34c is integrally formed.
The magnetization direction of the magnets 34b and 34c is as shown in FIGS. 1 and 4, but the magnetization direction may be reversed.

Reference numeral 35 denotes three balls, which are arranged so as to be sandwiched between the third group base member 31 and the third group lens holder 34 as shown in FIG.
One ball 35 is disposed in each of the recesses 31f, 31g, and 31h provided in the third group base member 31, and is in contact with a plane portion perpendicular to the optical axis.
Further, ball receiving surfaces 34g, 34h, 34i are provided at positions opposed to the plane provided on the lens holder 34 so that the ball 35 is sandwiched between the planes of the third group base member and the lens holder. It has become.
Reference numeral 36 denotes a tension spring which urges the third group base member 31 and the lens holder 34 through the ball 35 in the optical axis direction.
Specifically, the ends of the tension springs are hooked on the locking portions 31i, 31j, 31k provided on the third group base member 31 and the locking portions 34d, 34e, 34f provided on the third group lens holder 34, respectively. It is fast.

A coil holder 37 is fixed to the third group base member 31 with the third group lens holder 34 interposed therebetween.
The first coil 38a is held at the portion 37a, and the second coil 38b is held at the position 37b portion rotated 90 degrees from the lens center.
As shown in FIG. 4, the first magnet 34b and the first coil 38a, and the second magnet 34c and the second coil 38b face each other at a predetermined interval, and are placed in a magnetic circuit.
A magnetic force is generated by applying an electric current (independently) to the coils 38a and 38b, and the magnet 38 is moved by the repulsion or the attractive force.
That is, when the magnet 38 is moved by the magnetic force, the third group lens holder 34 is moved in the plane direction with respect to the optical axis.
Reference numeral 39 denotes a Hall element. It is held by the holding portions 31l and 31m of the third group base member 31, and faces the first magnet 34b and the second magnet 34c formed on the lens holder 34 with a predetermined interval.
The Hall elements 39a and 39b detect the position of the third group lens holder 34 by detecting changes in the magnetic force of the opposing magnets.
When camera shake (shake) is detected by a sensor (not shown), the correction lens L3 (third group lens holder 34) is moved by feedback control by a microcomputer (not shown) so as to correct image shake caused by this shake. I am letting.

Next, the configuration of the lens barrel including the third lens group on which the vibration isolator configured as described above in the present embodiment is mounted will be described with reference to FIGS.
FIG. 5 is an external perspective view illustrating a camera having a lens barrel provided with a third group lens equipped with a vibration isolator in a retractable type lens barrel having first to fourth group lenses in an embodiment of the present invention. The figure is shown.
FIG. 6 is a front view of the camera shown in FIG.
7 is a perspective view of the lens barrel, FIG. 8 is a cross-sectional view taken along line AA of FIG. 6 showing the internal structure of the lens barrel, and FIG. 9 is a cross-sectional view taken along line BB of FIG. 6 showing the internal structure of the lens barrel. 10 and 10 are cross-sectional views taken along the line CC of FIG. 6 showing the internal structure of the lens barrel.
11 is a cross-sectional view taken along the line AA in FIG. 6 showing the internal structure of the lens barrel portion in the wide shooting state, and FIG. 12 is a cross-sectional view taken along the line AA in FIG. 6 showing the internal structure of the lens barrel portion in the telephoto shooting state. is there.
FIG. 13 is a DD cross-sectional view of FIG. 6 showing the internal structure of the lens barrel.

In this embodiment, as shown in FIG. 5, a retractable lens barrel 2 is provided in front of the camera 1.
As shown in FIG. 8, the retractable lens barrel 2 includes a first group lens L1, a second group lens L2, a third group lens L3, and a fourth group lens L4.
Among these, the third group lens is a lens group on which the above-described vibration isolator is mounted, and the fourth group lens is a lens group that moves in the optical axis direction to perform focus adjustment.
In this embodiment, the first lens group, the second lens group, and the third lens group move in the optical axis direction for collapsing and zooming.

8 to 13, the first group lens L1 biases the first group follower 3a disposed at three positions apart from each other in the circumferential direction and the first group follower 3a so as to contact the first group cam groove 8b. It is held by a first group lens holder 3 having a group spring 3b and a first group rectilinear groove 3d.
The second group lens L2 is held by a second group lens holder 4 having a second group cam pin 4a, a main bar 2b extending in the optical axis direction, and a sub guide bar 2c.
The third group lens L3 is as described above, and the fourth group lens L4 is held by the fourth group lens holder 6.
The shutter unit 7 has an SH cam pin 7a, an SH sleeve 7b, and an SH steadying stop 7c.
As shown in FIG. 2, the main bar 2b is movably fitted by the fitting portions 31a and 31b of the third group base member, fitted by the SH sleeve 7b, and movably fitted in the optical axis direction. Match.
Further, as shown in FIG. 2, the sub guide bar 2 c is fitted with a third group steady rest 31 c and a SH steady rest 7 c movably in the optical axis direction.

A cam cylinder 8 and a fixed cylinder 9 are arranged on the inner peripheral side of the first group lens holder 3 and on the outer peripheral side of the second group lens holder 4.
The cam cylinder 8 rotates about the optical axis, and a gear portion 8a and a first group cam groove 8b are provided on the outer peripheral portion, and a second group cam groove 8c, a third group main cam groove 8d, a third group sub cam groove 8h, SH on the inner peripheral portion. A cam groove 8e and a cam cylinder drive cam groove 8g are provided.
The third group main cam groove 8d and the third group sub cam groove 8h have the same cam lift shape.
The first group follower 3a is biased toward the inner diameter side by the first group spring 3b, and is configured to contact the first group cam groove 8b.
In addition, as shown in FIG. 10, the third group sub-follower 32 is urged by the compression spring 33 and engaged with the third group sub-cam groove 8h with respect to the third group sub-cam groove 8h. .

On the outer peripheral wall of the fixed cylinder 9, through-hole-like two-group rectilinear grooves 9 a extending in the optical axis direction are arranged at three positions apart from each other in the circumferential direction.
Further, a first group rectilinear key 9c is formed on the upper end surface of the fixed cylinder 9 in the same phase as the second group rectilinear groove 9a.
A second group cam pin 4a is fitted in the second group rectilinear groove 9a so as to be movable in the optical axis direction. The first group rectilinear key 9c is fitted with the first group rectilinear groove 3d so as to be movable in the optical axis direction.

Further, as shown in FIG. 13, fixed cylinder followers 9 b are provided on the outer peripheral portion of the fixed cylinder 9 at three positions apart from each other in the circumferential direction.
At least one of the fixed cylinder followers 9b is urged to the cam cylinder drive cam groove 8g of the cam cylinder 8 by the fixed cylinder spring portion 9d, and the two fixed cylinder followers 9b remaining by the reaction force also form the cam cylinder drive cam groove 8g. Pressed.
10 is a drive gear, 11 is a zoom drive device, 12 is a main board, 13 is a lens barrel flexible, 14 is a CCD holder, and 15 is a 4-group drive device using a known voice coil.
The CCD holder 14 holds the fixed cylinder 9, the drive gear 10, the zoom drive device 11, and the fourth group drive device 15 and is fixed to the camera 1.
The main board 12 is connected to a CCD on the CCD plate 25 via a wiring (not shown), and the CCD on the CCD plate 25 photographs a subject image formed by the lens barrel 2 and functions as a known digital camera. To do.

Next, the operation of the retractable lens barrel 2 in this embodiment will be described in detail.
When the zoom drive device 11 is energized from the main board 12 shown in FIG. 7 through the lens barrel flexible 13, the cam cylinder 8 rotates around the fixed cylinder 9 via the drive gear 10 connected to the gear portion 8a of the cam cylinder 8. To do.
When the cam cylinder 8 rotates, the first group follower 3a that engages with the first group cam groove 8b on the inner peripheral side of the cam cylinder 8 fits into the first group rectilinear groove 3d along the lift of the first group cam groove 8b. It is guided by the group linear key 9c and moves in the optical axis direction.
Similarly, when the cam cylinder 8 rotates, the second group cam pin 4a engaged with the second group cam groove 8c on the inner peripheral side of the cam cylinder 8 is guided to the second group rectilinear groove 9a along the lift of the second group cam groove 8c. Moved in the direction of the optical axis.
Similarly, when the cam cylinder 8 rotates, the third group main follower 31d that engages with the third group main cam groove 8d on the inner peripheral side of the cam cylinder 8 moves along the lift of the third group main cam groove 8d. It is guided by 2c and moves in the optical axis direction.
Further, the third group sub cam groove 8h having the same cam shape as that of the third group main cam groove 8d and the third group sub follower 32 are engaged to assist movement in the optical axis direction.

When the cam cylinder 8 rotates, the SH cam pin 7a engaged with the SH cam groove 8e on the inner peripheral side of the cam cylinder 8 is guided by the main bar 2b and the sub guide bar 2c along the lift of the SH cam groove 8e. Move in the direction of the optical axis.
Further, the cam cylinder 8 in which the cam cylinder drive cam groove 8g engages with the fixed cylinder follower 9b on the outer periphery of the fixed cylinder 9 rotates from the state of FIG. 13 in the optical axis direction along the lift of the cam cylinder drive cam groove 8g. Moving.
The fourth group lens L4 is moved back and forth in the direction of the optical axis by the fourth group driving device 15 to perform a focusing operation.
In this way, the first group lens holder 3, the second group lens holder 4, the third group lens holder 5, the fourth group lens holder 6. As the shutter unit 7 and the cam barrel 8 move in the optical axis direction, the lens barrel 2 moves from the retracted state shown in FIGS. 8 to 10 to the wide photographing state shown in FIG.
Furthermore, when the cam cylinder 8 is rotated, the camera moves to the telephoto state shown in FIG.

Hereinafter, the function of the sub-follower in this embodiment will be described in detail.
First, in such a barrel, unlike the conventional lens barrel, it is assumed that the sub-follower urged to the anti-vibration lens group (group 3) is not provided.
If the lens correction drive frequency that the image stabilizer tries to correct according to camera shake and the mechanical resonance number match, a sound is generated due to resonance of the entire lens barrel, or feedback control becomes difficult due to oscillation. Problems occur.
This is because the vibration energy is transmitted to the entire lens barrel because there is no mechanism for attenuating vibration energy generated when the lens is driven by the vibration proofing device to correct the camera shake.

On the other hand, according to the configuration in which the urging member for urging the sub-follower is brought into contact with the cylindrical part provided on the outer peripheral portion of the vibration-proof lens group as in the present embodiment, the vibration energy is urged by the urging member. Can be attenuated, and resonance can be prevented.
In other words, if the anti-vibration lens group is firmly fixed to the main bar or sub guide bar, it should not vibrate, but actually it can slide in the main bar or sub guide bar and the fitting hole. There is such a small play.
Because of such backlash, vibration occurs at a high frequency, which may cause resonance.

This vibration energy is particularly large in the rotation direction around the main bar 2b.
Therefore, in order to effectively attenuate the vibration, it is preferable that the steadying direction (a direction orthogonal to the straight line connecting the main bar 2b and the sub guide bar 2c) is used as the biasing direction.
For this reason, the present embodiment is configured to urge the straight line connecting the main bar and the sub guide bar in a direction rotated by 45 degrees or more.

In addition, as a part to contact the third group sub-follower 32 via the biasing member, it can be brought into contact with the cam cylinder 8 or the fixed cylinder 9 provided on the outer peripheral portion of the base member. At this time, it is desirable that the cam cylinder 8 is configured to be engaged with the third group sub cam groove 8h.
The third group sub cam groove 8h (first engaging portion) and the third group main cam groove 8d (second engaging portion) have the same lift shape.
Therefore, by engaging with this groove, the zoom plane of the third group lens can be determined by the two points of the third group main follower 31d and the third group sub follower 32.
In such a configuration, for example, when the urging member is simply configured to be able to contact the cam cylinder 8 or the fixed cylinder 9 provided on the outer peripheral portion of the base member, the contact surface There is a possibility that the third lens group will fall during zooming due to friction.
This friction is reversed depending on the zooming direction. That is, the direction in which the third lens group falls is changed, which may affect the lens performance.
On the other hand, by engaging with the third group sub-cam groove 8h as in this embodiment, the influence on the lens performance can be brought into contact with the cam cylinder 8 or the fixed cylinder 9. It can suppress compared with the case where it is comprised only.

In the above-described embodiment, the configuration example in which the movement in the optical axis direction at the time of zooming of the third lens unit equipped with the image stabilizer is performed by following the cam groove has been described. It is not limited to such a configuration.
In the present invention, it is only necessary to have a structure that is supported by the guide bar and moves linearly. For example, a mechanism that moves in the optical axis direction by a stepping motor or the like may be used.

FIG. 3 is an exploded perspective view for explaining the configuration of a third group lens on which a vibration isolator is mounted in a retractable lens barrel including the first group lens to the fourth group lens in the embodiment of the present invention. The top view of FIG. 1 explaining the structure of the 3 group lens which mounts the vibration isolator in the Example of this invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2 for explaining the configuration of a third group lens equipped with a vibration isolator in an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the line B-B in FIG. 2 for explaining the configuration of a third group lens equipped with the image stabilizer in the embodiment of the invention. FIG. 3 is an external perspective view illustrating a camera having a lens barrel including a third group lens on which a vibration isolator is mounted in a retractable barrel including the first group lens to the fourth group lens in the embodiment of the present invention. The front view of the camera shown in FIG. 5 in the Example of this invention. 1 is a perspective view of a lens barrel in an embodiment of the present invention. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6 showing the internal structure of the lens barrel portion of the embodiment of the present invention. FIG. 7 is a cross-sectional view taken along the line B-B in FIG. CC sectional drawing of FIG. 6 which shows the internal structure in the lens-barrel part of the Example of this invention. FIG. 7 is a cross-sectional view taken along line AA of FIG. 6 illustrating the internal structure of the lens barrel portion of the embodiment of the present invention in a wide shooting state. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6 illustrating the internal structure of the lens barrel portion of the embodiment of the present invention in a telephoto state. DD sectional drawing of FIG. 6 which shows the internal structure in the lens-barrel part of the Example of this invention. The figure explaining the lens-barrel in patent document 1 which is a prior art example. The figure explaining the lens barrel in patent document 2 which is a prior art example.

Explanation of symbols

L1: Group 1 lens L2: Group 2 lens L3: Group 3 lens L4: Group 4 lens 1: Camera 2: Retractable barrel 31: Group 3 base member 31d: Group 3 main follower 32: Group 3 sub follower 33: Compression spring 34: 3 group lens holder 35: Ball 36: Tension spring 37: Coil holder 38: Magnet 39: Hall element 8: Cam cylinder 8d: 3rd group main cam groove 8h: 3rd group sub cam groove

Claims (7)

A lens barrel configured to be movable in the optical axis direction with a lens group provided with an image stabilizer,
A base member for holding the lens group including the vibration isolator movably in the optical axis direction along the guide bar;
An urging member held on the outer periphery of the base member;
And the urging member is in contact with a member provided on an outer peripheral portion of the base member to attenuate vibration energy generated when the vibration isolator is driven. Lens barrel with The base member is supported by two guide bars,
The urging member can be urged in a direction in which a straight line connecting the installation positions of the two guide bars is rotated by 45 degrees or more in a plane direction in which the lens group including the vibration isolator moves. A lens barrel comprising the image stabilizer according to claim 1, wherein the lens barrel is configured.   The lens barrel having the vibration isolator according to claim 1 or 2, wherein the biasing member includes a spring and a pin movable in a radial direction biased by the spring.   4. The vibration isolation device according to claim 1, wherein the biasing member is configured to be able to contact a cam cylinder or a fixed cylinder provided on an outer peripheral portion of the base member. 5. Lens barrel with device.   The said urging member is comprised so that contact | abutting to the 1st engaging part for moving the said base member provided in the said cam cylinder to an optical axis direction is possible. A lens barrel provided with the described vibration isolator. The base member has a pin member disposed in the vicinity of the support portion of the guide bar,
The cam cylinder is provided with a second engagement portion with which the pin member is engaged,
6. The lens barrel having a vibration isolator according to claim 5, wherein the first engaging portion and the second engaging portion have the same lift shape. The lens barrel is a collapsible lens barrel provided with a first group lens to a fourth group lens,
The base member is a third group base member that includes the anti-vibration device in a third group lens and holds the third group lens movably in the optical axis direction along the guide bar. A lens barrel provided with the vibration isolator according to any one of items 1 to 6.

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