JP2003161872A - Lens frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus that shifts a mobile frame in a lens frame in the optical axis direction with no play, with a simple configuration. <P>SOLUTION: A mobile frame engages with a cam ring movable in a direction orthogonal to the optical axis of a lens frame. With the cam ring as a guide member, a first cam follower provided to the middle frame engages with/slides on the cam groove provided to the cam ring. The mobile frame is further provided with a second cam follower, and a fixed frame is provided with a groove for straight advancing so that no mobile frame rotate. When the second cam follower engages with/slides on the groove, to rotate the cam ring, the mobile frame moves straight relative to the cam ring without rotation. Even if the mobile frame slightly moves to fill the play in radial direction, the cam ring also moves in the direction, and since the mobile frame is engaged with the cam ring, the mobile frame is surely driven in the optical axis direction with no blurring of an image. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel, and more particularly to a lens barrel for moving a frame member in the lens barrel in the optical axis direction thereof.

[0002]

2. Description of the Related Art Conventionally, it has been known to use a mechanism having a member called a so-called cam ring to move a lens holding frame or the like in a lens barrel in the optical axis direction. In addition, this mechanism is generally for moving the lens holding frame in a straight line, and the cam ring provided in the cam ring, the cam follower that is in sliding contact with the cam groove provided in the lens holding frame, and the lens holding frame. It is known that this cam follower is provided with a rectilinear groove that fits in sliding contact with the cam follower to suppress its rotation. In the mechanism having such a configuration, when the cam ring is rotated, the lens holding frame and the like do not rotate but move straight in the optical axis direction.

[0003]

With respect to the mechanism relating to the above-mentioned cam ring, conventionally, the moving frame, the lens holding frame, and the like, which move in the optical axis direction in the lens barrel, and the cam ring are in a direction orthogonal to the optical axis. However, there is a clearance in the direction orthogonal to the optical axis. Due to this clearance, when the lens moves in the optical axis direction, image performance is deteriorated or optical performance is deteriorated due to deviation of the lens optical core, which causes an unfavorable state.

This clearance, that is, the backlash, is reduced to a negligible level by increasing the accuracy of each component, or is forced from the side of the lens barrel.
Or it is the present situation whether it is processed by ignoring the play itself.

However, increasing the precision of each component causes an increase in cost, and a method of forcibly pressing the lens barrel from the side may cause an inconvenience of an increase in lens driving force.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a lens barrel which has a simple structure and which suppresses image blurring or deterioration of optical performance.

[0007]

A first lens barrel of the present invention is a lens barrel, which has a cam follower, is movable at least in the optical axis direction of the lens barrel, and the frame member. Along with it, the cam follower is slidable because it is movable in a direction orthogonal to the optical axis of the lens barrel and rotates around the optical axis of the lens barrel to drive the frame member in the optical axis direction. And a cam ring having a cam groove for fitting.

The second lens barrel of the present invention is, in the lens barrel, has a cam follower and is movable at least in the optical axis direction of the lens barrel, and the lens barrel together with the frame member. To be movable in a direction orthogonal to the optical axis of the frame, to rotate around the optical axis of the lens mirror frame to drive the frame member in the optical axis direction, and to slidably fit the cam follower A cam ring having a cam groove of
And a cam ring movement permitting means for moving the cam ring in a direction orthogonal to the optical axis of the lens barrel.

Further, a third lens barrel of the present invention is, in the lens barrel, having a cam follower, at least a frame member movable in the optical axis direction of the lens barrel, and the lens mirror together with the frame member. To be movable in a direction orthogonal to the optical axis of the frame, to rotate around the optical axis of the lens mirror frame to drive the frame member in the optical axis direction, and to slidably fit the cam follower A cam ring having a cam groove, and cam ring position restricting means for allowing the cam ring to move in a direction orthogonal to the optical axis of the lens frame and for restricting the movement of the cam ring in the optical axis direction. , Are provided.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 are exploded perspective views of a lens barrel applied to an image pickup apparatus according to the first embodiment of the present invention. FIG. 5 is a vertical sectional view of the lens barrel.

The lens barrel arranged in the image pickup apparatus according to the present embodiment is a zoom lens barrel having a four-group structure, and for zooming, the cam ring 3 is rotated by using a stepper (stepping motor) as a driving source. By doing so, each lens group holding frame is advanced and retracted. Focusing is performed by driving the CCD holder 14 itself, which holds the CCD, which is an image sensor, back and forth by an electromagnetic actuator.

The present lens barrel has the above perspective view,
As shown in the cross-sectional view and the like, the outer fixed frame 1 fixed to the camera body mainly via each fixed frame described later, and the first group lens 41.
And holds the cam ring 3 through the three cam followers 22a.
The first group frame 2 which is one of the lens holding frames having a so-called three-piece suspension structure, which can be freely moved back and forth by the cam grooves 3a, and the cam grooves 3a, 3b, 3c, 3d for driving the respective holding frames are arranged. A rotatable cam ring 3, a corrugated washer 4 for urging the cam ring, and an inner fixed frame 5 fixed to the outer fixed frame 1 are provided.
And have. It should be noted that the corrugated washer 4, the outer fixed frame 1, and the inner fixed frame 5 all serve to regulate the movement of the cam ring 3 in the optical axis direction. That is, it has a function as a cam ring position regulating means.

The present lens barrel further holds guide shafts 7 and 8 for supporting each lens frame other than the first group frame 2 and the CCD holder 14 so that the CCD holder 14 can move back and forth, and the second group lens 42. The second group frame 9 which is a lens holding frame which is supported by 8 and which can freely move back and forth, and the third group lens 43 are held, and the guide shafts 7 and 8
A third group frame 10 which is a lens holding frame which is supported by
And a fourth group frame 11 which is a lens holding frame which holds the fourth group lens 44 and is supported by the guide shafts 7 and 8 and which can move back and forth.
A yoke 12 that constitutes an electromagnetic actuator for driving a CCD
And a rear fixed frame 13 that supports the guide shafts 7 and 8 and the yoke 12, and a guide shaft 7 and 8 that are slidably supported by the guide shafts 7 and 8 to hold the CCD 55 and the LPF 54 and to drive the electromagnetic force to move back and forth. Drive coil 1 that constitutes an actuator
4b is wound around the CCD holder 14 and the LPF
54, the CCD 55, the rear cover 15 that regulates the guide shafts 7 and 8 in the axial direction, and a cam ring driving unit that drives the cam ring to rotate and uses the stepper 51 as a driving source. have.

The outer fixed frame 1, the inner fixed frame 5, and the rear fixed frame 1
3 is integrally fixed with screws through the respective mounting holes 1a and 5a ', 5a and 13a in a state where the respective constituent members described below are incorporated. The relative positioning of the frames 1 and 13 in the rotational direction at the time of fixing is performed by fitting the positioning pins 1b and 13b into the positioning holes 5b of the inner fixed frame 5.

Then, the first group frame 2 is inserted into the outer fixed frame 1 so as to be movable back and forth in a state in which the rotation is restricted.
The rotation is restricted by inserting a boss 23 coaxially provided with the pin 22 of the first group frame 2 into the straight guide groove 1j arranged on the inner peripheral portion of the outer fixed frame 1 to restrict the rotation. To be done. Here, instead of the boss 23, a roller may be supported by the pin 22 and fitted into the straight guide groove 1j. The forward / backward drive of the first group frame 2 during zooming is performed by the rotation of a cam ring 3 described later.

Further, on the inner peripheral portion of the outer fixed frame 1, there are convex portions 1d and 1e which serve as linear reference guide portions downward along the advancing / retreating direction.
However, linear projections 1f and 1g are provided on the upper side. Further, a leaf spring 21, which is a biasing member, is screwed to the mounting portion 1h in the opening 1i at the upper center. Even if the above-mentioned first group frame 2 is fitted in the convex portions 1d, 1e, 1f, 1g in a state where there is a fitting backlash required for mechanical or component precision, the first group frame 2 is downward. And the outer periphery thereof is in contact with the convex portions 1d and 1e. During the zooming operation, the first group frame 2 moves forward and backward in this state, and in the normal photographing state, this contact state is always maintained, and the first group lens 41 does not tilt with respect to the lens barrel optical axis O. become.

When an upward external force is applied to the first group frame 2, the outer circumference of the first group frame 2 only slightly moves until it comes into contact with the convex portions 1f and 1g.

The cam ring 3 is rotatably fitted in the inner peripheral portion of the first group frame 2, and further, the inner fixed frame 5 is fitted in the inner peripheral portion of the cam ring 3. However, a corrugated washer 4 is inserted on the outer periphery of the inner fixed frame 5, and the corrugated washer 4 has a flange portion 3h of the cam ring 3 and a flange portion 1c of the outer fixed frame 1.
Press so as to abut. Due to this pressing force, the above 1
The group frame 2 is positioned with respect to the inner and outer fixed frames 5 and 1 in the optical axis direction. Further, since the corrugated washer 4 is inserted with the groove 4a provided on the inner periphery thereof fitted in the convex portion 5e of the inner fixed frame 5, its rotation is restricted. If the space formed between the flange portion 3h of the cam ring 3 and the flange portion 1c of the outer fixed frame 1 is a space 1z as shown in FIG. 5, the cam ring 3 is orthogonal to the optical axis in this space 1z. It becomes possible to move in the direction. Further, as described above, in the present embodiment, the corrugated washer 4, the outer fixed frame 1, and the inner fixed frame 5 all serve to regulate the movement of the cam ring 3 in the optical axis direction. That is, not only does it function as a cam ring position restricting means, but also functions as a cam ring movement permitting means that allows the cam ring to move by a clearance amount in the direction orthogonal to the optical axis, if necessary.

A gear portion 3i is provided along the outer circumference of the flange portion of the cam ring 3, and a drive gear 34a of a cam ring driving portion, which will be described later, meshes with the gear portion 3i, and the gear portion 3i meshes with the driving portion. The cam ring 3 is rotated from the wide position to the tele position.

The wide position is detected by a PI (photo interrupter) 53 in which the shielding leaf portion 3j provided on the flange portion is arranged at a rotation position corresponding to the wide position on the rotation locus. It Positioning of each zooming position is performed on the basis of the wide position.

The protrusion-like stopper 3k provided on the flange portion of the cam ring 3 is inserted into the groove portion 1k provided on the flange portion 1c of the outer fixed frame 1, and the wide end of the cam ring 3 is Alternatively, it acts as a rotation stopper at the tele end.

There are three first-group frame cam grooves 3a provided on the outer periphery of the cam ring 3, and the cam followers 22a of the first-group frame 2 are slidably fitted therein. The first group frame 2
Is restricted in its rotation, and when the cam ring 3 rotates, it moves back and forth in the optical axis O direction. Note that FIG. 6 shows a cross-sectional view of the outer fixed frame 1, the first group frame 2, and the cam ring 3 around the cam follower 22a as seen from the CCD side.

Further, cam grooves 3b, 3c and 3d for the second, third and fourth group frames are provided on the inner peripheral portion of the cam ring 3, and the second, third and fourth group frames 9, 10, 11 are respectively provided. The cam followers 9c, 10c, 11c fixed to the above are slidably fitted. When the cam ring 3 rotates, the holding frames move to the optical axis O.
It will move back and forth in the direction.

The cam ring drive section uses the stepper 51 as a drive source, but the rotation of the pinion 31, which is the output gear thereof, is rotated via the two-stage gear 32 by the drive gears 34b and 34a.
Is further transmitted to the gear portion 3i of the cam ring 3. In order to mesh the drive gear 34a with the gear portion 3i of the cam ring 3, the flange portion 1 of the outer fixed frame 1 is
An escape groove 1m is provided in c.

The drive gears 34b and 34a are integrated via a gear shaft 35. And the shaft 35 is
It is slidably and rotatably inserted in and supported by the elongated hole of the gear box 37. The direction of the slot is a two-stage gear 32
Of the small gear of the drive gear 34b and the cam ring 3
The engagement position between the gear portion 3i and the drive gear 34b is divided into two parts. Further, a torsion spring 36 is wound around the gear shaft 35 to urge the shaft 35 in the direction of the elongated hole. Therefore, the meshing gap between the small gear of the two-stage gear 32 and the drive gear 34b and the meshing gap between the gear portion 3i of the cam ring 3 and the drive gear 34b are simultaneously filled, and there is no mesh backlash.

The pinion 31, which is the output gear of the stepper 51, meshes with the shield plate gear 37, and the step-out of the stepper 51 during the zooming drive is detected by the rotating state of the shield plate gear 37. That is, the rotation of the shield plate 37a formed on the shield plate gear 37 is detected by the PI 52, the state of the output pulse thereof is judged by the CPU (not shown), and the step-out of the stepper 51 is detected.

The support structure for the guide shafts 7 and 8 is as follows.
In front of the guide shafts 7 and 8 on the inner fixed frame 5 (subject side)
Support holes 5f and 5g for supporting the end of the
The ends of the guide shafts 7 and 8 are inserted therein, the radial direction is positioned, and further, the subject side direction is restricted in the optical axis direction.

The substantially intermediate portions of the guide shafts 7 and 8 are supported by the axial holes 13f and 13g of the rear fixing frame 13 in a state of being positioned in the radial direction. The positions of the shaft hole 13f and the shaft hole 13g in the optical axis direction are shifted so as to be convenient because of the support structure of the lens holding frame and the CCD holder, as will be described later. Forward,
That is, it is positioned on the subject side. Then, after the CCD holder 14 is inserted, the rear side of the guide shafts 7 and 8 (CCD
The end portion of the side) is a rear cover-1 fixed to the rear fixing frame 13.
The bottomed holes 15f and 15g of No. 5 regulate and hold down the optical axis direction.

The guide shafts 7 and 8 slidably support the second group frame 9, the third group frame 10 and the fourth group frame 11 between the inner fixed frame 5 and the rear fixed frame 13. That is, the guide shaft 7 has a forked portion 9f of the second group frame 9, a third group frame 10, and a shaft hole portion 10 of the fourth group frame 11.
f and 11f are fitted. The guide shaft 8 has a shaft hole portion 9g of the second group frame 9, a third group frame 10, and a forked portion 10g, 11 of the fourth group frame 11.
g is fitted, and the frames 9, 10 and 11 are slidably supported in a state of being housed inside the inner fixed frame 5.

As described above, the cam followers 9c, 1 fixed to the second, third, fourth group frames 9, 10, 11 are attached.
0c and 11c are openings 5c and 5d, which will be described later, of the inner fixed frame 5.
To be slidably fitted into the cam grooves 3b, 3c, 3d of the cam ring 3. The escape of the followers 9c, 10c, 11c, and the guide shafts 7, 8 and the frames 2, 3, 4 group 9,
The inner fixed frame 5 is provided with the openings 5c and 5d along the optical axis O in order to allow the shaft holes 10 and 11 to escape.

7 and 8 show the second group frame 9 and the third group frame 1, respectively.
The cross section of the lens barrel seen from the CCD side around the insertion portion of 0 is shown.

One end of the backlash removing spring 26 is hooked on the projection 9d of the second group frame 9, and the other end of the spring is hooked on the projection 5h inside the inner fixed frame 5, so that the second group frame 9 The fitting backlash of the cam ring 3 and the cam groove 3b of the cam follower is removed. Further, the backlash removing springs 27 are hooked on the protrusions 10d and 11d of the third and fourth group frames 10 and 11 to fit the cam grooves 3c and 3d of the cam ring 3 to the cam followers of the third and fourth groups 10 and 11. I'm taking backlash.

The yoke 12 has its mounting hole 12a.
Through the mounting hole 13 on the subject side of the rear fixing frame 13
It is fixed at c and 13d. Further, the yoke 12 is made of a magnetic material, and has a yoke inner peripheral portion 12b as shown in the sectional view around the yoke portion of FIG. 9, and four magnets are arranged vertically and horizontally facing the inner peripheral portion 12b. 16 is attached.
The magnets 16 disposed above and below are attached along the horizontal scanning direction of the CCD 55 described later, and the magnets 16 disposed on the left and right are the CCD 5
5 is attached along the vertical scanning direction. By disposing the magnet 16 in this way, the effective length of the magnet 16 in the radial direction can be efficiently increased, and the electromagnetic actuator can be operated more efficiently.

FIG. 9 is a cross-sectional view around the yoke portion as seen from the CCD side showing the relative arrangement positional relationship between the yoke 12, the second, third and fourth group frames 9, 10, 11 and the guide shafts 7, 8.
As shown in this figure, the guide shafts 7, 8 supporting the second, third, fourth group frames 9, 10, 11 are located at the four corners on the diagonal of the yoke 12 and in the gaps at the ends of the magnet 16. I am letting you. By locating the guide shafts 7 and 8 on a diagonal line while avoiding the portion where the magnet 16 is present, the center distance between the guide shafts 7 and 8 is made as narrow as possible while ensuring the effective length of the magnet. Then, 2, 3, 4 group frame 9, 10, 1
The span of the support section of 1 is shortened.

Of the four corners on the diagonal of the yoke,
For the two places where the guide shaft is not arranged, the space can be effectively utilized by arranging the position detecting sensor and the speed detecting sensor of the CCD holder or the iris driving member.

The CCD holder 14 has a rear portion, that is,
LPF (low-pass filter) 54 and CCD from the CCD side
55 is attached. Furthermore, the LPF of the CCD holder
A drive coil 14b is wound integrally with the CCD holder 14 so as to surround the LPF 54 on the outer periphery of the cylindrical portion outside the 54 mounting portion.

By efficiently disposing the coil, the yoke, and the magnet as the components of the CCD driving electromagnetic actuator in the peripheral portion of the LPF as described above, the optical axis direction and the radial direction of the lens barrel are not increased in size. An actuator for driving the CCD can be realized.

Further, the CCD holder 14 is the rear fixing frame 1.
Guide shaft 7, which is supported by three shaft holes 13f, 13g,
8 is inserted from the non-subject side, that is, the CCD side, and is slidably fitted. In the fitted state, the drive coil 1 is
4b is inserted forward through the opening 13a and is located in a portion surrounded by the inner peripheral portion 12b of the yoke 12 and the magnet 16. After that, the rear cover 15 is attached to the rear of the rear fixed frame 13, and the guide shafts 7 and 8 are in a state in which the position of the guide shafts 7 and 8 is regulated in the optical axis direction.

When the CCD holder 14 is attached to the guide shafts 7 and 8, the length of the holder 14 in the optical axis direction may be relatively short in terms of holding accuracy.
On the side of the guide shaft 7 supported by f, a shaft hole 14g that needs to have a relatively long length in the optical axis direction in terms of holding accuracy is formed in the shaft hole 1
They are inserted through the guide shaft 8 side supported by 3 g.

On the other hand, as described above, the above-mentioned fourth group frame 11 is mounted on the subject side of the rear fixed frame 13, that is, on the front side, and the length of the fourth group frame 11 in the optical axis direction is on the guide shaft 7 side. Has a relatively long shaft hole 11f, and a bifurcated portion 11f having a relatively short length in the optical axis direction of the fourth group frame 11 is fitted on the guide shaft 8 side. In addition, the shaft hole 13f of the rear fixing frame 13,
As for the disposition position of 13g, as described above, the shaft hole 1f into which the guide shaft 7 is inserted is closer to the shaft hole 13f into which the guide shaft 8 is inserted.
It is located rearward of 3 g along the optical axis direction.

Thus, the shaft holes 11f and C of the fourth group frame 11 are
The forked portion 14f of the CD holder 14 faces each other, and further, the forked portion 11g of the fourth group frame 11 and the shaft hole 14g of the CCD holder 14
Has a structure in which members having a long dimension and members having a short dimension face each other and are assembled so as to face each other, and the separation distance in the optical axis direction in the assembled state of the fourth group frame 11 and the CCD holder 14 is kept as small as possible.

Since the CCD holder is supported by the guide shafts 7 and 8 so as to be able to move back and forth, as will be described later, the CCD is controlled by controlling the current flowing through the drive coil 14b.
The holder 14 and hence the CCD 55 can be driven back and forth. The position of the CCD holder 14 is detected by a position sensor (not shown), and the CCD holder 14 is positioned based on the signal.

Next, the driving operation of the present lens barrel constructed as described above will be described.

First, when the power switch (not shown) is turned on, the stepper 51 is driven and the cam ring 3 is rotated to the wide end position which is the reset position, and 1, 2, 3, 4
The group frames 2, 9, 10, and 11 are moved to the wide end positions, respectively. When performing zooming, the stepper 51 is driven from the above state, the cam ring 3 is rotated, and 1, 2, 3, 4
The group frames 2, 9, 10, and 11 are moved in accordance with zooming. The CCD holder 1 is controlled by controlling the current of the drive coil 14b of the electromagnetic actuator.
The CCD 55 on 4 is moved to follow the zoom tracking position, which is the focus position corresponding to the zooming position. That is, the CCD 55 moves hourly according to the zooming operation in order to maintain the in-focus state.

When focusing is performed in this way, the CCD holder 14 is driven forward and backward by the electromagnetic actuator to move the CCD 55 to the in-focus position.

As described above, the lens barrel applied to the image pickup apparatus of this embodiment is for adjusting the focus by moving the CCD 55 forward and backward in the optical axis direction. In many cases, the focus is adjusted or the inspection is performed by removing 14. Therefore, the present lens barrel has a structure in which the CCD holder 14 is inserted into the guide shafts 7 and 8 which are supported by the rear fixed frame 13 from the rear side. At times, it is possible to remove the CCD holder 14 without disassembling the guide shafts 7 and 8 simply by removing the rear cover 15.
The assembly adjustment and the like can be easily performed.

Further, shaft holes 13f and 13g for supporting the guide shafts on the rear fixed frame 13 are arranged at positions displaced in the optical axis direction. Therefore, it is a member inserted in the front and rear of the rear fixed frame 13, is supported by the guide shafts 7 and 8, and has a fourth group frame 1 having shaft holes 11f and two-forked portions 11g of different lengths.
1 and the CCD holder 14 having the shaft hole 14g and the forked portion 14f having different lengths can be attached with the shaft holes and the forked portions corresponding to each other. Therefore, the fourth group frame 11 and the CCD holder 14 can be mounted as close to each other as possible, the members can be assembled with high accuracy, and the lens barrel and the imaging device can be downsized.

Further, in this embodiment, the guide shafts 7 and 8 are arranged so that the distance between the centers of the guide shafts 7 and 8 is as narrow as possible in relation to the arrangement position of the magnet 16 of the yoke 12 for the electromagnetic actuator. The spans of the supporting portions of the second, third and fourth group frames 9, 10, 11 are shortened. Further, since the coil, the yoke, and the magnet as the constituent elements of the electromagnetic actuator are efficiently arranged in the peripheral portion of the LPF 54, the lens barrel can be made compact.

In the description of the present embodiment, the first group frame is taken as an example of the frame member that moves together with the cam ring in the direction orthogonal to the optical axis of the lens mirror frame. It goes without saying that the present invention can be applied to the selected lens group by selecting an appropriate lens group related to the optical performance of 1.

[0051]

As described above, in the lens barrel of the present invention, since the cam ring is also movable in the direction orthogonal to the optical axis of the lens barrel, it is generated in the direction orthogonal to the optical axis of the lens barrel. It is possible to remove backlash, and thereby to prevent image blurring or deterioration of optical performance due to the lens barrel.

[Brief description of drawings]

FIG. 1 is a part of an exploded perspective view of a lens barrel applied to an image pickup apparatus according to an embodiment of the present invention.

2 is a part of an exploded perspective view of the lens barrel of FIG.

FIG. 3 is a part of an exploded perspective view of the lens barrel of FIG.

4 is a part of an exploded perspective view of the lens barrel of FIG.

5 is a vertical cross-sectional view taken along the optical axis of the lens barrel of FIG.

6 is a cross-sectional view of the outer fixed frame, the first group frame, and the cam ring of the lens barrel of FIG. 1 orthogonal to the optical axis.

7 is a cross-sectional view of the inner fixed frame and the third group frame of the lens barrel of FIG. 1 taken along a plane orthogonal to the optical axis.

8 is a cross-sectional view of the inner fixed frame and the second group frame of the lens barrel of FIG. 1 taken along a plane orthogonal to the optical axis.

9 is a cross-sectional view around the yoke portion of a surface orthogonal to the optical axis, showing the arrangement of the yoke and the guide shaft of the lens barrel of FIG.

[Explanation of symbols]

2 …………………… 1 group frame (lens holding frame) 7,8 ……………… Guide shaft (axial guide member) 9 …………………… 2 group frame (lens holding frame) 10 ……………… 3 group frame (lens holding frame) 11 ……………… 4 group frame (lens holding frame) 13 ……………… Rear fixed frame (fixed member) 13f, 13g ... Shaft hole member (support member) 14 ……………… CCD holder (image sensor holding frame) 55 ……………… CCD (image sensor)

Claims (3)

[Claims] 1. In a lens barrel, a frame member having a cam follower and movable in at least the optical axis direction of the lens barrel, and movable together with the frame member in a direction orthogonal to the optical axis of the lens barrel. A cam ring having a cam groove for slidably fitting the cam follower for driving the frame member in the optical axis direction by rotating around the optical axis of the lens frame. A lens barrel characterized by doing 2. In the lens barrel, a frame member having a cam follower and movable in at least the optical axis direction of the lens barrel, and movable together with the frame member in a direction orthogonal to the optical axis of the lens barrel. A cam ring having a cam groove for slidably fitting the cam follower so as to drive the frame member in the optical axis direction by rotating around the optical axis of the lens mirror frame; A lens barrel frame, comprising: a cam ring movement permitting unit configured to move the ring in a direction orthogonal to the optical axis of the lens barrel frame. 3. In the lens frame, a frame member having a cam follower and movable in at least the optical axis direction of the lens frame, and together with the frame member, movable in a direction orthogonal to the optical axis of the lens frame. A cam ring having a cam groove for slidably fitting the cam follower so as to drive the frame member in the optical axis direction by rotating around the optical axis of the lens mirror frame; And a cam ring position restricting means for restricting the movement of the cam ring in the optical axis direction while allowing the ring to move in a direction orthogonal to the optical axis of the lens barrel. frame.