JPH0743769A - Lens frame supporting mechanism - Google Patents

Abstract

PURPOSE:To provide a lens frame supporting mechanism having a simple constitution for a supporting mechanism, capable of attaining the miniaturization and also provide with a structure capable of reducing the load of an actuator in a lens frame rotatable mechanism. CONSTITUTION:Driving gears 8a and 8b are arranged in the X-axis direction and the Y-axis direction of a lens barrel main body 16 which is supported so as to be rotated around the center point G of rotation. A face gear 7b which is rotated around the X-axis is arranged integrally with the lens barrel main body 16, and the driving ear 8b is meshed with the gear 7b. And also, an independently rotating member 10 capable of rotating around the X-axis is mounted on the lens barrel main body 16. A face gear 7a is arranged integrally with the independently rotating member 10, the driving gear 8a is meshed with the gear 7a, and when the driving gear is rotated, the lens barrel main body 16 is rotated around the center point G.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens frame support mechanism, and more particularly to a lens frame support mechanism capable of rotating and driving an optical axis of a lens barrel body.

[0002]

2. Description of the Related Art Conventionally, as a lens frame supporting mechanism capable of rotating a lens barrel unit in the optical axis direction for performing camera shake correction and automatic tracking control of a camera or the like, a lens frame having a so-called gimbal structure is used. A support mechanism was used. FIG. 50 is a perspective view of a conventional lens frame support mechanism using the gimbal structure. In the lens frame support mechanism, the lens barrel 301 is rotatably supported by the first support body 302 via the support pin 301a. Further, the first support body 302 is rotatably supported by a second support body 303 via a support pin 302a, and the second support body 303 is fixedly supported by a camera body (not shown). The lens barrel 301 in the holding mechanism configured as described above is in a state in which there is no rotation component around the optical axis O, that is, a state in which the lens barrel 301 can rotate in the vertical direction θy and the horizontal direction θx in a so-called rolling-regulated state. Will be held at.

When the conventional lens frame support mechanism constructed as described above is rotationally driven, the rotational drive in the vertical direction θy about the horizontal axis is usually performed by an actuator (not shown) attached to the first support 302. And further the second support 3
03, or an actuator (not shown) mounted on the camera body, is driven to rotate about the vertical axis in the horizontal direction θx direction.

The lens frame support mechanism applied to the image blur correction mechanism disclosed in Japanese Patent Laid-Open No. 4-104666 also uses the gimbal structure shown in FIG. The lens frame support mechanism is driven by making the lens frame rear end surface 304 spherical and fixing two sets of magnets to the lens frame rear end surface 304.
Bidirectional driving is performed by two sets of moving coil type actuators formed by two sets of exciting coils corresponding to the magnets on the main body side. Numerals 305a and 305b shown in FIG. 50 indicate vertical direction θy and horizontal direction θy.
This is a shake sensor that detects the shake of x, and this sensor is held by the lens barrel 301.

When the image blur correction is performed by the lens frame support mechanism, the image blur is corrected and driven by the two pairs of moving coil type actuators so that the outputs of the shake sensors 305a and 305b become zero. Correction is made.

[0006]

However, the above-mentioned FIG.
According to the conventional lens frame support mechanism shown in 0, first, as the support mechanism, as described above, the first and second support members 302 and 303 are used.
It was necessary to make the double structure, and it was inevitable that the lens barrel became large. Further, an actuator for rotationally driving in the vertical direction θy needs to be attached to the first support body 302, and the first support body 302 is rotationally held by the second support body 303. Therefore, the load on the actuator for driving the second support 303 increases,
At the same time as the power consumption increases, there is a problem that the lens frame structure further increases in size.

Further, the lens frame support mechanism used in the image blur correction mechanism disclosed in the above-mentioned Japanese Patent Laid-Open No. 4-104666 is
By mounting the actuator on the outside of the support, it is possible to solve the problem that the load of the actuator itself affects the load of the lens barrel as in the conventional example. However, because of the double-structured support structure of the first and second supports 302 and 303 as described above, the enlargement of the lens barrel is inevitable.

The present invention has been made to solve the above-mentioned problems, and in a lens frame supporting mechanism which can be driven to rotate in the optical axis direction of the lens frame, the supporting mechanism itself is simplified and the lens frame It is an object of the present invention to provide a lens frame support mechanism that can be downsized and further reduce the load on an actuator for rotation.

[0009]

SUMMARY OF THE INVENTION A lens frame supporting mechanism of the present invention is a lens barrel main body and a support for rotatably supporting the lens barrel main body around an approximately one point in the lens barrel main body. Part, at least two drive parts for rotating the lens barrel body while being supported by the support part, driven parts provided on the lens barrel body, and a lens barrel body provided on the lens barrel body. An independent rotating member which is arranged at a predetermined position on the outer surface and is rotatable about an axis substantially parallel to a plane perpendicular to the optical axis of the lens barrel body, and at least one driven portion is arranged. It is characterized by comprising.

[0010]

The lens barrel main body is provided with an independent rotating member, and the lens barrel main body rotatably supported is rotationally driven by the drive unit via the independent rotating member.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an essential part of a lens barrel unit 4 according to a first embodiment of the present invention, which is a lens barrel supporting mechanism. FIG.
In contrast to the conventional lens frame supporting mechanism having the gimbal structure described above, the lens frame supporting mechanism of the present lens barrel unit 4 has a rotation center point where the lens frame body 16 is on the optical axis O (coincident with the Z axis). A mechanism that is rotatably supported by G, and that drives the lens frame main body 16 to rotate about the X or Y axis passing through the center point G by two sets of drive units.

By the way, as a means for solving the problem of the conventional lens frame driving mechanism having the gimbal structure shown in FIG. 50, a mechanism for rotating the lens frame body, in which the outer periphery of the lens barrel body is integrally structured, is used. It is considered that the driven spherical surface is used and the friction transmission method is applied as the driving method. However, this type of structure, as explained next,
A friction sliding resistance component in a direction different from the driving direction is generated on the friction driving surface, which may cause a problem of increasing the driving load of the mechanism.

As an application of the above friction transmission system,
An example of a conventional lens frame drive mechanism will be described with reference to FIG. 51 which is a perspective view. In this mechanism, as shown in the above perspective view, the lens frame body 203 is rotatable in two directions θx and θy by two sets of support driving members 204 and 205 via the outer spherical surface portion 203a.

The main components of the mechanism are a driven and supported spherical surface portion 203b, and a guide groove 203a extending parallel to the optical axis O direction.
With a point G passing through the optical axis O of 1 as the center, horizontal and vertical axes X0
, Frame body 203 supported rotatably around Y0
And the first and second support drive members 204, 20 which are respectively in contact with the spherical surface portion 203b in a substantially point contact relationship, and are in rolling contact with each other in order to give a displacement and rotationally driven in predetermined directions.
5 and a movement restricting portion for restricting rotation around the optical axis O (hereinafter referred to as rolling restriction), and the guide groove 2
Columnar rotation restricting pin 21 slidably fitted into 03a
0 and two spherical receiving members 20 that constitute the receiving portion on the lower surface side of the spherical surface portion 203b and that regulate the movement in the optical axis direction.
8a and 208b, and a spherical receiving member 209 that serves as a receiving portion on the side surface side of the spherical surface portion 203b.

The first and second support drive members 204 and 205
Is composed of a spherical rotating member whose surface is a friction member, and is driven by rotary drive actuators 206 and 207, respectively. Then, the lens frame body 203 is driven in the horizontal and vertical rotation directions θx and θy, and at the same time, the lens frame body 102 is moved through the spherical surface portion 103.
It regulates the position in the horizontal and vertical directions of the X0 and Y0 axes. Incidentally, in the neutral state of rotation as shown in FIG. 51, the optical axis O coincides with the Z0 axis.

FIG. 52 is a diagram showing a driving state of the lens frame supporting mechanism of FIG. 51. FIG. 52A shows the lens frame body 2
3 is a plan view of a main part when the optical axis O of 03 is in a position orthogonal to the X0 and Y0 axes, that is, in a neutral state.
In addition, FIG. 52B is a plan view showing a state in which only the second support driving member 205 is driven to perform the rotational drive of the angle θ. In this state, the optical axis O is in the Z1 axis direction, and in the figure, X1
The axis is in the direction orthogonal to Z1. Further, FIGS. 53A and 53B show the states of FIGS. 52A and 52B as viewed from the back surface side of the drawing, that is, the rotation regulating pin 210 side. A view of arrow A in FIG. 52 (B) is shown in FIG. 54 (A). FIG. 55 is a view on arrow B of FIG. 54 (B).

In the above-mentioned lens frame support mechanism, when the state of FIG. 52A is driven to the state of FIG. 52B, slippage does not occur between the second support drive member 205 and the spherical surface portion 203b. , There are no driving problems.

However, from the state shown in FIG. 52B, that is, the state shown in FIG. 54A, the first support drive member 20 is changed.
4 is rotated, and the lens frame body 203 is moved to the axis X of FIG.
When it is rotated by an angle φ around 1, its optical axis O changes from the Z1 axis to the Z2 axis as shown in FIG. Then, because of the rotation about the axis X1, slippage of the pressure contact surface between the second support drive member 205 and the spherical surface portion 203b occurs along the arc L. Then, the first support driving member 204
When driving the, friction sliding resistance due to the sliding acts,
The load torque of actuator 206 increases accordingly. This increase in torque causes step out if the actuator is a stepping motor. In addition, a DC motor consumes more current. Therefore, it is not preferable as a mechanism for camera shake correction or tracking of a camera or the like. Further, since the support driving member is a mechanism for frictionally driving the spherical surface of the lens barrel main body, the support driving member needs to be formed of an elastic member having a large friction coefficient such as rubber, which increases the friction torque as described above. Is not preferable for the above members in terms of durability.

Therefore, in order to solve the above-mentioned inconveniences in the conventional lens frame driving mechanism shown in FIG. 51, the lens frame driving mechanism of the first embodiment of the present invention is proposed. . The lens frame drive mechanism of the first embodiment will be described in detail. As shown in the perspective view of FIG. 1, the lens frame driving mechanism of this embodiment includes a lens barrel unit 4 built in a support frame 2.
Is a mechanism for rotatably driving the lens barrel main body 16 in the horizontal and vertical directions. The lens barrel unit 4 is rotatably supported by the lens barrel main body 16 that holds the taking lens 1. And an independent rotation member 10 and two X-axis drive units and Y-axis drive units for rotationally driving the lens barrel unit 4 in relation to the X and Y axes orthogonal to each other.

2 shows a front view of the lens barrel unit 4, FIG. 3 shows a side view, and FIG. 4 shows a plan view. 5 is a sectional view taken along the line AA 'in FIG. The reference horizontal axis, vertical axis, and orthogonal axis on the support frame 2 are indicated by X0, Y0, and Z0 axes, and
The vertical and optical axes are indicated by X, Y, and Z axes. The X and Y axes are orthogonal to each other, and the Z axis coincides with the optical axis O of the taking lens 1. The intersection of the X, Y and Z axes coincides with the center point G of the rotation. When the lens barrel body 16 is in the neutral position, the X0, Y0 and Z0 axes coincide with the X, Y and Z axes.

The X-axis drive unit is a drive motor 5a fixed to the support frame 2, a gear train 12a built in the gear box 3a and driven by an output pinion 11a of the drive motor 5a, and the gear train 12a. And a drive shaft 6a which is driven by the rotary shaft 6a and is rotatable about the X0 axis.
And a drive gear 8a fixed to the. In addition,
The drive gear 8a is formed by a spur gear.

The Y-axis drive unit is a drive motor 5b fixed to the support frame 2, a gear train 12b built in the gear box 3b and driven by an output pinion 11b of the drive motor 5b, and the gear train. Driven by row 12b, Y0
The drive shaft 6b is rotatably arranged around the shaft, and the drive gear 8b is fixed to the drive shaft 6b. The drive gear 8b is formed of a spur gear.

The lens barrel main body 16 is a motion restricting portion for restricting the rotation of the main body 16 around the optical axis. A V groove 9b formed along an arc passing through the axis O is arranged. As shown in the perspective view around the V-groove 9b in FIG. 6 and the cross-sectional view in FIG. 7, the V-groove 9b is supported by the tip spherical surface portion 6b0 of the drive shaft 6b in contact with the optical axis of the main body 16. It regulates rolling, which is the rotation around it. The V groove 9b
Also functions as a supported portion that rotatably supports the lens barrel body 16. Further, the groove may have a U-groove shape or a square groove shape.

Further, as shown in FIGS. 6 and 7, the lens barrel main body 16 is provided with a face gear 7b which is a driven portion formed along the V groove 9b and having the X axis as a gear rotation center. It is arranged. The drive gear 8b is meshed with the face gear 7b. Therefore, when the drive gear 8b rotates, the lens barrel body 16 rotates about the X axis orthogonal to the Y axis.

On the other hand, the independent rotation member 10 is rotatably supported on the X-axis of the lens barrel body 16 via a support pin 10a. The independent rotation member 10 is provided with a V groove 9a formed along an arc passing through the X axis. As shown in the perspective view around the rotating member in FIG. 8 and the cross-sectional view in FIG. 9, the V groove 9a is provided at the tip spherical surface 6a0 of the drive shaft 6a.
Abut and are supported.

Further, as shown in FIGS. 8 and 9, the independent rotation member 10 is formed along the V groove 9a, and the rotation center is about an axis passing through the rotation center point G of the lens barrel body 16. And
A face gear 7a that is a driven portion is formed. The drive gear 8a is meshed with the face gear 7a. Therefore, when the drive gear 8a rotates, the lens barrel body 16 rotates about the Y axis orthogonal to the X axis via the independent rotation member 10.

2, which is a view taken in the direction of arrow B in FIG. 2 and shows a supporting portion of the lens barrel body 16, as shown in FIG. 10, at a position facing the contact position of the drive shafts 6a and 6b on the lens barrel body 16. Is spherical part 16
The spherical portion 16a is formed by a hemispherical support portion 15 fixed to the support frame 2 and is slidably supported in a substantially point contact. Further, it may be supported in the same recess as the spherical surface 16a.

Next, the operating state of the lens frame driving mechanism of the present embodiment constructed as described above will be described with reference to FIGS. 11 to 16. FIG. 11 shows that the drive gear 8b is rotated by the Y-axis drive unit from the neutral state shown in the side view of FIG.
FIG. 6 is a side view in a state where the Y axis of the lens barrel body 16 is rotated in the Y ′ direction and the optical axis O direction thereof is rotated in the Z ′ direction. At this time, even if the lens frame body 16 rotates, the independent rotation member 10 is held at the original position as shown in FIG.
Note that FIG. 12 is a plan view in the rotating state of FIG. 11.

In FIG. 13, from the rotating state shown in FIGS. 11 and 12, the drive gear 8a is further rotated by the X-axis drive section to rotate the X-axis of the lens barrel body 16 in the X'direction. It is a plan view in a state in which the optical axis O direction is rotated to the Z ′ direction. At this time, the independent rotating member 10 is rotated with the face surface of the face gear 7a kept horizontal.

In FIG. 14, the drive gear 8a is rotated by the X-axis drive unit from the neutral state shown in the plan view of FIG. 4 to rotate the X-axis of the lens barrel body 16 in the X'direction. It is a plan view in a state in which the optical axis O direction is rotated to the Z ′ direction. Note that FIG. 15 is a view on arrow A of FIG. FIG. 16 shows a state in which the rotation state shown in FIG.
By rotating the drive gear 8b by the Y-axis drive section, the Y-axis of the lens barrel body 16 is rotated in the Y'direction, and its optical axis O
It shows a state in which the direction is further rotated from the Z'direction to the Z "direction. In this state, the face surface of the face gear 7a of the independent drive unit 10 remains facing in the horizontal direction.

As described above, in the lens frame drive mechanism of this embodiment, the two face gears 7a and 7b are applied to the driven portion, and one of the face gears 7a is used as the X-axis driven portion for the X-axis. Since it is arranged on the independent rotating member 10 which is rotatable about the axis, the lens barrel body 16 can be smoothly rotated about the X and Y axes. Further, since the friction drive member is not used, the increase of the drive load due to the frictional resistance, which is a defect of the drive mechanism shown in FIG. 51, is eliminated,
Rotational driving with a smaller driving torque is possible. Further, the lens barrel unit 4 can be downsized at the same time.

Next, a driving portion and a driven portion showing a modification of the lens frame driving mechanism of the first embodiment will be described. Figure 1
7 and 18 are a perspective view and a vertical cross-sectional view around a gear mechanism that is a drive unit and a driven unit, showing the modification. In this modification, a bevel gear is applied as a gear forming a drive unit and a driven unit for rotationally driving the lens frame body 16A. However, the structure other than the gear portion is the same as the mechanism of the first embodiment.

In the body of the lens barrel of this modification, a V formed along an arc passing through the Y axis and the optical axis O as in the first embodiment.
A groove 29 is provided. As shown in the perspective view of FIG. 17 and the sectional view of FIG.
The spherical end portion 26a of the drive shaft 26 for the shaft abuts,
The rolling, which is the rotation of the lens barrel body 16A around the optical axis, is restricted. Further, the lens barrel body 16A has
As shown in FIG. 18, a large bevel gear 27 of a driven portion is provided which is formed along the V groove 29 and has a rotation center point G (see FIG. 1) as the center of rotation. A small bevel gear 28 fixed to the drive shaft 26 meshes with the large bevel gear 27. Therefore, when the drive shaft 26 is rotationally driven, the lens frame body 16A is rotationally driven about the X axis orthogonal to the Y axis via the gear.

Although the Y-axis rotary drive system has been described with reference to FIGS. 17 and 18, the same configuration is used for the X-axis rotary drive system. In the drive system, the small bevel gear is used. Is fixed to the X-axis drive shaft, and the large bevel gear is arranged on the independent rotating member 10A.

As described above, in the lens frame support mechanism of this modification, since the bevel gears are applied to the driving portion and the driven portion, the driving force is efficiently transmitted and the backlash of the gears is small. It is possible to rotate the lens frame body with high accuracy.

Next, a modified example of the independent rotating member of the lens frame support mechanism of the first embodiment will be described. This variation is
As shown in the exploded perspective view of FIG. 19 and the sectional view of FIG. Even in a certain state, the independent rotation member 31 has a structure that absorbs the misalignment and enables centering drive.

FIG. 21 is a sectional view taken along the line AA 'in FIG. 20, FIGS. 22 and 23 are perspective views of the independent rotating member 31, and FIG. 24 is a plan view. The independent rotation member 31 has a V groove 31 similar to that of the first embodiment.
e, a face gear 31d is provided, and the drive shaft 36 whose tip spherical surface portion 36a abuts the V groove 31e,
A drive gear 38, which is a spur gear that meshes with the face gear 31d, is fixed. The other structure is similar to that of the first embodiment.

The centering drive structure of the independent rotating member 31 will be described. As shown in FIGS. 19 to 22, the centering drive guide is provided on the contact surface side of the independent rotating member 31 to the lens frame body 32. An elongated hole 31a having a width S, which is a portion, is provided. The longitudinal direction of the elongated hole 31a is a direction orthogonal to the extending direction of the V groove 31e. On the other hand, the lens frame body 32 has the elongated hole 31a.
A pin 32a having a diameter t that fits in is arranged. The arrangement position of the pin 32a is on the X axis of the lens barrel body.

Then, as shown in FIG. 20, the independent rotation member 31 is mounted by inserting the pin 32a of the lens barrel body 32 into the elongated hole 31a. In this state, the independent rotating member 3
1 is rotatable with respect to the lens barrel body 32, and is movable in a direction intersecting with the V groove 31a. Then, the tip spherical surface portion 36a of the drive shaft 36 is brought into contact with the V groove 31e. In this assembled state, the independent rotation member 31
Is restricted from moving in the X-axis direction. Further, the drive shaft 36 comes into contact with the V groove 31e as described above, so that the independent rotation member 31 is positioned in a direction intersecting with the V groove 31a. By the positioning movement of the independent rotation member 31 in the direction intersecting with the V groove 31a, the drive shaft 3
Even if the position 6 and the pin 32a of the lens barrel body 32 are misaligned, they can be mounted on the lens barrel body 32 via the independent rotation member 31 without adjusting the position of the X-axis drive unit. Then, the drive gear 38 is meshed with the face gear 31d, and the lens barrel body 32 is made rotatable.

When the drive section is assembled to the lens barrel, if the elongated hole 31a is not an elongated hole shape but a round hole, the rotation center axis of the lens barrel body 32 and the drive shaft 36 axis center. In order to completely match the position of the pitch circle radius r1 of the drive gear 38 (see FIG. 19) and the position of the distance r2 between the center of the V groove 31e and the pitch circle of the face gear 31d (see FIG. 19). It is necessary to adjust the position of the X-axis drive unit. However, in this modification, as described above, since the independent rotation member 31 is provided with the elongated hole 31a, even if there is the above-mentioned deviation, it can be removed and mounted without adjusting the position. it can. Then, the meshing state between the drive gear 38 and the face gear 31d becomes good, and smooth driving becomes possible.

Next, another modification of the independent rotating member of the lens frame supporting mechanism of the first embodiment will be described. In this modification, the independent rotation member 41 has a small frictional resistance against the contact surface of the lens frame body, and in order to always stably contact the independent rotation member 41, as shown in the perspective view of FIG. Rib-shaped projections 41b, 41, which are two support parts, on the side of contact with the cylinder body.
c is provided. Then, as shown in the cross-sectional view in the operating state around the independent rotation member of FIG. 26, the independent rotation member 41 has the guide pin 42a of the lens frame body 42 fitted into the support hole 41a arranged at the rotation center. It is installed in the state. Further, the tip end portion of the drive shaft 46 contacts the V groove 41 e of the rotating member 41. Then, the above two protrusions 41
The b and 41c are brought into contact with the lens frame body 42, so that a stable rotational movement with a small frictional resistance of the rotating member 41 can be obtained.

26 (A) and 26 (B) are sectional views showing the rotating states of the drive gear 48 and the face gear 41d at the relative drive positions, respectively.
When the drive gear 48 is in the neutral position with respect to the face gear 41d, (B) shows that the drive gear 48 is the face gear 41d.
It is sectional drawing in the state which rotated to the lower end of the movable range of d.

In the state of FIG. 26 (A),
Since the substantially uniform biasing force acts on the protrusions 41b and 41c, the independent rotation member 41 is stably supported by the lens frame body 42. Further, as shown in FIG. 26B, even when the drive shaft 46 is located at one end of the rotating member 41, the contact position of the drive shaft 46 is the protrusions 41b to 41.
Since it is located in the area within c, the reaction force generated in the protrusions 41b and 41c will not disappear, and the independent rotation member 41 will always be stably supported by the lens barrel body 42.
This is because the two protrusions 41b and 41c are arranged at both ends of the rotating member 41.

If, as shown in the sectional view in the operating state of FIG. 27, the protrusion 41 of the supporting portion arranged on the rotating member 41 '.
In the structure in which b'and 41c 'are arranged inward,
Although there is no problem in the neutral state shown in (A), when the drive shaft 46 is located at the end of the operating range as shown in (B), the contact force of the drive shaft 46 acts on the outside of the protrusion 41b '. It will be in a state where In this state, a clockwise moment acts on the independent rotation member 41 'to try to lift the opposite side. Then, the independent rotation member 41 ′ is not supported by the lens barrel body 42 in a stable state.

Here, the protrusion 41 of the independent rotation member 41 is provided.
The allowable arrangement position of b will be described. In the cross-sectional view around the independent rotation member 41 of FIG. 28, the drive shaft 46 is in the neutral position 46A.
And the state is at the limit position 46B of the rotation range.
The inter-center distance R between the protrusion 41b and the support hole 41a needs to satisfy the following equation. That is, R> D × tan θ (1) Note that the dimension D is the distance between the rotation center G of the lens barrel body and the contact surface, and the angle θ is the drive shaft 46. Is the limit position 46
When in B, the position of the pin 41a and the position of the drive shaft 46 are at an angle with respect to the rotation center G.

As described above, by applying the independent rotating member 41 shown in this modification, the rotating member 41 is accurately held by the lens barrel body 42, and highly accurate rotational drive is performed.

Next, another modification of the independent rotating member of the lens frame supporting mechanism of the first embodiment will be described. This modified example is a perspective view of FIG. 29, instead of the rib-shaped protrusions 41b and 41c shown in FIG. 25, which is a support member for constantly stably abutting the independent rotation member on the lens frame body. As shown in FIG.
It is characterized in that b and 51c are provided. Note that FIG.
[FIG. 4] is a plan view of the independent rotation member 51 attached,
FIG. 31 is a side view of the same mounted state.

The independent rotating member 51 of this modification is provided with a face gear 51d and a V groove 51e as in the case of the first embodiment, and further, as shown in FIG. The elongated hole 51a, which is the centering drive guide portion described in the above, is arranged in the direction orthogonal to the V groove 51e. The support pin 5 slidably fitted in the elongated hole 51a is located at a position on the X axis of the lens barrel body 52 to which the independent rotating member 51 is mounted.
2a is provided.

In this modification, since the pin-shaped projections 51b and 51c, which are the supporting portions, are arranged at four places,
The mounting state of the independent rotating member 51 on the lens barrel body 52 is further improved, and the rotating operation can be performed with less frictional resistance. Furthermore, since the centering drive of the independent rotation member 51 and the lens barrel main body 52 is also performed, the assembly becomes easy.

Next, another modification of the independent rotating member of the lens frame supporting mechanism of the first embodiment will be described. This modified example is a perspective view of FIG. 32, instead of the rib-shaped projections 41b and 41c shown in FIG. 25, which is a support member for constantly abutting the independent rotation member on the lens frame body. As shown in FIG. 6, the ribs 6 having a triangular cross section are formed on the independent rotation member 61.
1b and 61c are provided. Note that FIG.
FIG. 3 is a plan view in which the independent rotation member 61 is mounted.

A face gear 61d and a V groove 61e are provided in the independent rotation member 61 of this modification as in the first embodiment, and further, an elongated hole which is a guide portion for centering drive. 6
1a is arranged in a direction orthogonal to the V groove 61e. In addition,
A support pin 62a slidably fitted in the elongated hole 61a is provided in a lens barrel body 62 to which the independent rotating member 61 is mounted.

In this modification, since the triangular rib-shaped projections 61b and 61c, which are the supporting portions, are arranged at two places, the pivoting operation can be performed with less frictional resistance.
Further, since the independent rotation member 61 and the lens barrel main body 62 are also driven so as to be aligned, the assembly is facilitated.

Next, another modification of the independent rotating member of the lens frame supporting mechanism of the first embodiment will be described. This modified example is a support member for always stably abutting the independent rotation member on the lens frame body, instead of the rib-shaped projections 41b and 41c on the independent rotation member 61 shown in FIG. hand,
As shown in the plan view of the mounted state of FIG. 34, rib-shaped projections 72b and 72c having a triangular cross section are arranged on the lens barrel body 72 side.

The lens barrel main body 72 has an independent rotating member 71.
A support pin 72a to be fitted in is also provided, and the independent rotation member 71 is provided with a face gear 71d and a V groove 71e. In the present modification, the independent rotating member 7
The shape of No. 1 is simplified, and the rotation operation can be performed with less frictional resistance.

Next, a lens frame support mechanism showing a second embodiment of the present invention will be described. FIG. 35 is a perspective view of the lens frame supporting mechanism of the present embodiment, and FIG. 36 is a longitudinal sectional view of a main part of the lens barrel unit 102 of the lens frame supporting mechanism. The lens frame support mechanism of the present lens barrel unit 102 is different from the conventionally considered lens frame support mechanism having the structure described in FIG. 51. It has an independent rotating member 111 that is a member that can rotate about an axis that passes through the rotation center G on the optical axis O and is orthogonal to the optical axis O, that is, about the horizontal axis X0 in the neutral state. is there. The rotating member 1
Reference numeral 11 denotes a supported portion in a movable region centering on the rotation center G, which is a driven portion and has a spherical portion which serves as a supported portion, on the outer surface thereof. Other configurations are the same as those shown in FIG.

More specifically, as shown in FIGS. 35 and 36, the lens barrel main body 103 is provided with a spherical surface portion 103b which is a supported portion and is a driven portion.
A spherical first support drive member 104, which is a friction material, is in contact with b on a vertical axis Y0 passing through the rotation center G in a substantially point contact state. Further, on the axis X0 of the spherical portion of the rotating member 111, the spherical second support driving member 10 as a friction material is provided.
Similarly, 5 abuts in a substantially point contact state. These supporting and driving members 104 and 105 are the actuator 1 respectively.
It is rotationally driven by 06 and 107.

Further, on the vertical axis Y0 at the position on the lower side of the lens barrel body 103, a rotation regulating pin 110 which is a motion regulating portion for regulating rolling is provided, and the lower portion of the lens barrel body 103 is provided. Guide groove 10 provided parallel to the optical axis O of
It is fitted in 3a. Further, in addition, spherical receiving portions 108a, 108b, and 109 are provided on the spherical surface portion 103b on the lens barrel main body 103 and on the opposing spherical surface portion of the independent rotation member 111, similarly to the conventional mechanism of FIG. It is assumed to be installed.

The lens barrel body 10 of the rotating member 111 is
As shown in the sectional view of FIG. 36 and the enlarged sectional view around the independent rotating member of FIG. 37, the mounting structure of the independent rotating member 111 has the tapered surface of the plurality of precision bearing balls 11.
2 is supported in a rolling state. The plurality of precision bearing spheres 112 are held by a sphere holder 113 so as not to come into contact with each other, and are rotatably supported in the concave portion of the lens barrel body 103. Further, the retaining action in the axial direction of the independent rotating member 111 is performed by the mechanism arranged in the central portion 102b.

38 to 41 show the respective rotational movement states of the lens frame support mechanism of the present embodiment constructed as described above. 38A and 39A are a plan view and a bottom view when the lens barrel body 2 is in the neutral state.
From the state of FIG. 38 (A), the second support drive member 105
When is rotated, the lens barrel body 103 is rotated by an angle θ, and the direction of the optical axis O is Z1 as shown in the plan view of FIG. 38B or the bottom view of FIG. 39B. Direction. The axis orthogonal to the optical axis O is the X1 direction. This Figure 3
A view (A) of FIG. 8B is shown in FIG.

Further, when the first support driving member 104 is rotated from the state of FIG. 40A, that is, the state of FIG. 38B, the lens barrel body 2/103 rotates by the angle φ. 40A to 40B, the optical axis O direction is located in the Z2 direction. The axis orthogonal to the optical axis O is the Y1 direction. Note that FIG. 41 is a view on arrow B of FIG.

In the rotation driving operation of the lens barrel body 103, since the independent rotation member 111 can rotate about the X1 axis, the second support drive member 105 and the independent rotation member 111 can be rotated.
There is no slip at the contact part with and frictional sliding does not occur. Then, the increase in the driving load of the first support driving member 104 due to the frictional sliding due to the sliding at the abutting portion, which has occurred in the above-described conventional mechanism, disappears, and due to insufficient torque during driving of the actuator 106. Problems such as step-out and increase in current consumption are eliminated. At the same time, the deterioration of durability due to the friction is reduced.

In the second embodiment, the independent rotation member 111 is arranged so as to face the second support drive member 105, but the first support drive member 1 positioned in the vertical direction is arranged.
It is also possible to propose a lens frame support mechanism in which a rotating member is arranged so as to face 04, as a modification thereof.

FIG. 42 is a vertical sectional view of a lens frame support mechanism of the above modification. Although this drawing shows the neutral state of the mechanism, in this mechanism, the vertical axis Y0
The independent rotating member 121 capable of rotating at the center is the precision bearing ball 1.
It is supported and attached to 22. The first support drive member 104 is in contact with a supported surface of the rotating member 121, that is, a spherical surface portion serving as a driven portion. Also, the horizontal axis X that is the supported part and is the driven part.
The second support drive member 105 is provided on the spherical portion 123b in the 0 direction.
Are in contact.

In the mechanism of this modification, the frictional sliding of the first support drive member 104 is reduced, and the increase of the drive load of the second support drive member 105 is suppressed. In addition, in addition to the mechanism of this modification, a second
The independent rotation member 11 is also provided at the contact portion of the support drive member 105.
1 can be mounted, and according to the modified example of such a configuration, slippage is unlikely to occur in both the first and second support drive members 104 and 105, and a further reduction in drive load can be realized.

Next, the lens frame supporting mechanism of the third embodiment of the present invention will be described. In the second embodiment, the motion restricting portion is composed of the guide groove 103a provided in the lens barrel body 103 and the rotation restricting pin 110, whereas it is applied to the lens frame supporting mechanism of this embodiment. The movement restriction unit
As shown in the cross-sectional view of FIG. 3, the member in which the guide groove 136a is arranged has a separate structure from the lens barrel body 133,
It has a structure in which it is rotatably attached to a vertical axis Y0 passing through the center of rotation G of the third axis.

That is, the lower portion along the vertical axis Y0 of the barrel main body 133 facing the position where the first support drive member 104 is disposed is rotatably supported with respect to the sleeve 135 fixed to the main body 133. A supporting shaft 134 is provided.
A position regulation guide member 136 is fixed to the tip of the support shaft 134. Further, the guide member 136 is provided with the guide groove 136a. And the guide groove 1
A rotation restricting pin 137, which is a motion restricting member fixed to the lens frame supporting member, is slidably fitted into 36a.

Also in the mechanism of this embodiment, as shown in the side views of FIG. 43 and FIG. 44, the spherical support portion 133b of the lens barrel body 133 has the first and second support drive members 10.
4, 105 are in contact with each other, and the lens barrel body 133 is
2 The positions facing the support driving members 104 and 105 are supported by the spherical receiving members 134 and 135 and a spherical receiving member (not shown).

Next, the rotating operation of the lens frame supporting mechanism of the present embodiment having the above-mentioned structure will be described. FIG. 45 shows
The lower surface side of the lens frame support mechanism, that is, the rotation restricting pin 137.
It is a figure which shows each operation state seen from the side, and (A) of FIG. 45 shows a neutral state, (B) rotates the 2nd support drive member 105, and shows the optical axis of the lens-barrel main body 133. It shows a state in which O is driven up to the Z1 axis direction. First in this state
Since the support component 104 does not rotate, the guide member 1
36 also rotates similarly to the lens barrel body 133.

Subsequently, when the first support drive member 104 is rotated, the lens barrel body 133 is driven from the state of FIG. 45 (B) to the position shown in FIG. 45 (C). At this time, the guide member 136 is rotated by the action of the rotation restricting pin 137,
The direction of the guide groove 136a of the guide member 136 is parallel to the Z0 axis that coincides with the tangential direction of the rotation of the first support drive member 104.

When the guide groove 136a is parallel to the Z0 axis in this way, the lens barrel body 133 can be rotated about the X0 axis orthogonal to the Z0 axis, and the first support drive member can be rotated. 104 and the spherical portion 133 of the lens barrel body 133.
b, and between the second support drive member 105 and the lens barrel body 1
There is almost no slippage due to driving at the contact portions between the spherical surface portions 133b of 33. Therefore, in this driving state, the frictional sliding resistance due to the sliding, which has been acting in the conventional mechanism described above, does not act, and the phenomenon that the load torque of the actuator increases does not occur.

Next, a lens frame supporting mechanism of the fourth embodiment of the present invention will be described. The lens frame support mechanism of this embodiment is shown in FIG.
47 or a vertical sectional view of FIG. 47, an independent rotation is provided in the upper part of the lens barrel main body 143 with a gear part 144a having a rotation range as a movable range and a rotation center G as a center. The member 144 is rotatably attached. Further, the gear unit 1
Pinion 14 which is a first support drive member meshing with 44a
6 is disposed above the lens barrel body 143. As another configuration, in the lens barrel main body 143, an independent rotating member 111 similar to that applied to the first embodiment is arranged on the horizontal axis X0 in a neutral state passing through the rotation center G, The second support drive member 105 is disposed in contact with a spherical surface portion, which is a supported portion disposed on the rotating member 111, which is a driven portion. Furthermore, a position regulation guide member 13 which is a motion regulation portion applied to the mechanism of the third embodiment.
6 and a rotation restricting pin 137 are arranged below the lens barrel body 143.

As shown in the longitudinal sectional view of FIG. 47, the rotating member 144 is rotatably mounted on the lens barrel body 143 through a plurality of precision bearing balls 145 that can roll. The center of rotation is the vertical axis Y0 passing through the center of rotation G in the neutral state. Further, the mechanism for preventing the rotating member 144 from coming off the lens barrel body 143 is provided on the convex portion 143a. Further, the pinion 14 is attached to the gear 144a.
6 meshes with each other, but the pinion 146 may be disengaged from the gear 144a when the rotating member 144 provided with the gear 144a is rotated.
A ring-shaped guide 146a is provided on the side surface of the roller 6. A photographing lens 151, a CCD image pickup device 152, and the like are arranged along the optical axis O inside the lens barrel body 143.

Next, the rotating operation of the lens frame supporting mechanism of the present embodiment having the above-mentioned structure will be described. FIG. 48 shows
It is a plan view showing each operating state of the lens frame support mechanism,
48 (A) shows a neutral state, and FIG. 48 (B) rotates the second support driving member 5 to set the optical axis O of the lens barrel body 133 to Z.
It shows the state that it has rotated up to the 1-axis direction. In this state, the independent rotating member 144 can rotate, so that FIG.
(B), the driven direction of the gear 144a is Z0.
It matches the axis. Then, when the pinion 146 is rotated, the lens barrel main body 143 rotates the optical axis O from the state of FIG. 48B to the Z2 axis direction as shown in FIG. 48C.

In this driving state, the lens barrel body 14 is
3 is X0 which is orthogonal to the Z0 axis due to the action of the motion restricting section.
The pinion 146 is rotatable about its axis, and there is no slippage at the contact portion of the second support driving member 105 due to the action of the rotating member 111. Therefore, the load on the actuator for driving the pinion 146 is reduced. It does not increase due to frictional sliding.
In this embodiment, the first support drive member is the pinion 1.
Since it is composed of 46, there is no deterioration in durability due to wear.

Next, a lens frame support mechanism showing a fifth embodiment of the present invention will be described. FIG. 49 is a perspective view of the lens frame support mechanism of this embodiment. The lens barrel unit of the lens frame support mechanism is
As shown in the figure, a spherical surface portion 183 that holds the taking lens 181 and is a supported portion and a driven portion.
a lens barrel main body 183 having a, an independent rotation member 185 rotatably supported around the X axis of the lens barrel main body 83, and having a spherical surface portion that is a supported portion and is a driven portion; An output portion 186a that supports the projection member 184, which is a support portion for rotatably supporting the lens barrel main body 183 about the rotation center point G, and the independent rotation member 185 by abutting on the spherical surface portion thereof.
Ultrasonic transducer 186 of the X-axis driving section and an ultrasonic transducer 187 of the Y-axis driving section having an output section 187a that abuts and supports the lens barrel body 183 on its spherical surface section 183a.
Although not shown, it is mainly configured by a motion restricting member that restricts rolling of the lens barrel body 183. The output unit 186 a of the ultrasonic transducer 186 is the same as the independent rotation member 18 described above.
The spherical surface portion of No. 5 is driven so as to move in the direction along the Z axis. The output unit 187a of the ultrasonic transducer 187 is
It is driven so as to move the spherical surface portion 183a of the lens barrel body in the direction along the Z axis.

In the lens frame supporting mechanism of this embodiment having the above-described structure, the lens barrel body 183 and the ultrasonic transducer 1
An ultrasonic motor structure is formed by 86 and 187, and the lens barrel main body 183 becomes rotatable about the X and Y axes. That is,
When the ultrasonic transducer 187 is driven, the lens barrel body 1 is directly
When 83 is rotationally driven around the X axis orthogonal to the Y axis and the ultrasonic transducer 186 is driven, the lens barrel main body 183 is rotated around the Y axis orthogonal to the X axis via the independent rotational member 185. It is driven to rotate.

In the lens frame support mechanism of this embodiment, as in the lens frame support mechanism described as the second embodiment, one of the driven parts is provided with an independent rotating member 185 which is rotatable about the X axis. Since it is arranged, the increase in the driving load due to the frictional resistance, which is a problem of the driving mechanism shown in FIG. 51, is reduced, and the rotational driving can be performed with a smaller driving torque. Also, because an ultrasonic transducer is applied as the drive unit,
The response speed to the rotational drive is fast, and the lens barrel unit can be made more compact.

The lens frame support mechanism of the present invention can be applied not only for camera shake correction but also as a lens barrel rotation mechanism such as a camera tilt mechanism. Further, not only the camera-integrated VTR, but also an electronic still camera or a rotation supporting mechanism for a lens barrel body of a silver salt film camera can be applied.

[0079]

As described above, in the lens frame support mechanism of the present invention, by disposing the rotatable and driven independent rotating member on the lens barrel body, the independent rotating member is provided. The loss of the driving force between the driving member and the driving member abutting against it is extremely reduced, the increase of the load on the actuator is avoided, and at the same time, the deterioration of the durability due to the friction is also reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a lens frame support mechanism showing a first embodiment of the present invention.

FIG. 2 is a front view of a main part of the lens frame support mechanism of FIG.

3 is a side view of a main part of the lens frame support mechanism of FIG.

FIG. 4 is a plan view of the lens frame support mechanism of FIG.

5 is a sectional view taken along the line AA ′ of FIG.

FIG. 6 is a perspective view around a gear portion and a V groove of the lens frame support mechanism of FIG. 1;

FIG. 7 is a cross-sectional view around the gear portion and the V groove of the lens frame support mechanism of FIG.

8 is a perspective view of an independent rotation member of the lens frame support mechanism of FIG.

9 is a cross-sectional view of the lens frame support mechanism of FIG. 1 around an independent rotating member.

10 is a view taken in the direction of the arrow B in FIG. 2 showing a supporting portion of the lens frame supporting mechanism of FIG.

11 is a side view of the lens frame support mechanism of FIG. 1 in a state in which it is rotated about the X axis from a neutral state.

FIG. 12 is a plan view in the rotation operation state of FIG.

FIG. 13 is a plan view showing a state in which rotation about the Y axis is performed from the rotation state of FIGS.

14 is a plan view of the lens frame support mechanism of FIG. 1 in a state in which it is rotated about the Y axis from a neutral state.

FIG. 15 is a view on arrow A of FIG.

FIG. 16 is a diagram showing a state in which rotation about the X axis is performed from the rotation state shown in FIGS.

17 is a perspective view of a bevel gear mechanism portion of a driving and driven portion of a modified example of the lens frame support mechanism of the first embodiment of FIG.

FIG. 18 is a cross-sectional view around the bevel gear mechanism portion of the modified example of FIG.

FIG. 19 is a cross-sectional view of a modified example of the lens frame support mechanism of the first embodiment shown in FIG. 1 around the independent rotating member.

FIG. 20 is a cross-sectional view around the independent rotation member of the modified example of FIG.

21 is a cross-sectional view taken along the line AA ′ of FIG.

22 is a perspective view of an independent rotation member of the modified example of FIG.

23 is a perspective view of the independent rotation member of the modification of FIG.

FIG. 24 is a plan view of the independent rotation member of the modified example of FIG.

FIG. 25 is a perspective view of an independent rotation member of another modification of the lens frame support mechanism of the first embodiment shown in FIG.

FIG. 26 is a cross-sectional view around the independent rotating member of the modified example of FIG. 25, (A) shows the drive shaft in the neutral position,
FIG. 7B is a sectional view when the drive shaft is at the end position of the drive range.

FIG. 27 is a cross-sectional view around the independent rotation member when the protrusion position of the independent rotation member is inappropriate in relation to the modification example of FIG. 25, and (A) shows the drive shaft in the neutral position. 2B is a sectional view when the drive shaft is at the end position of the drive range.

FIG. 28 is a cross-sectional view around the independently rotating member of the modified example of FIG. 25, which is used for calculation when obtaining the allowable arrangement position of the protrusion.

FIG. 29 is a perspective view of an independent rotating member of still another modified example of the lens frame support mechanism of the first embodiment of FIG. 1.

FIG. 30 is a plan view of the independent rotation member of the modified example of FIG. 29.

FIG. 31 is a side view of the independent rotation member of the modified example of FIG. 29.

32 is a perspective view of an independent rotating member of still another modified example of the lens frame support mechanism of the first embodiment of FIG.

FIG. 33 is a plan view of the independent rotating member shown in FIG. 32.

34 is a plan view of an independent rotation member of still another modification of the lens frame support mechanism of the first embodiment of FIG. 1. FIG.

FIG. 35 is a perspective view of a main part of a lens frame support mechanism showing a second embodiment of the present invention.

36 is a vertical cross-sectional view of the lens frame support mechanism of FIG. 35.

FIG. 37 is an enlarged cross-sectional view around the independent rotating member of the lens frame supporting mechanism of FIG. 35.

38 is a plan view of relevant parts showing each operating state of the lens frame support mechanism of FIG. 35, (A) showing a neutral state, FIG.
(B) shows a state in which the barrel main body is driven by the second support drive member.

FIG. 39 is a bottom view of a main part in each operating state of the lens frame support mechanism of FIG. 35, in which (A) is (A) of FIG. 38;
38B, and FIG. 38B corresponds to FIG. 38B.

FIG. 40 is a diagram showing each operating state of the lens frame support mechanism of FIG. 35, wherein (A) is a view taken in the direction of arrow A in (B) of FIG. 38, and (B) is a view of (A) of FIG. FIG. 8 is a view showing a state in which the lens barrel body is rotated by the first support drive member from the state of FIG.

41 is a view on arrow B of FIG. 40 (B).

42 is a longitudinal sectional view of a main part of a lens frame support mechanism showing a modification of the second embodiment of FIG. 35. FIG.

FIG. 43 is a longitudinal sectional view of an essential part of the lens frame support mechanism showing the third embodiment of the present invention.

44 is a side view of a main part of the lens frame support mechanism of FIG. 43.

45 is a bottom view of the essential parts showing each operating state of the lens frame support mechanism of FIG. 43, (A) showing a neutral state,
(B) shows a state in which the barrel body is driven by the second support drive member, and (C) shows a state in which the barrel body is driven by the first support drive member from the state of (B).

FIG. 46 is a front view of the essential parts of the lens frame support mechanism showing the fourth embodiment of the present invention.

47 is a longitudinal sectional view of a main part of the lens frame support mechanism of FIG. 46.

48 is a plan view of relevant parts showing each operating state of the lens frame support mechanism of FIG. 46, in which (A) shows a neutral state;
(B) shows a state in which the barrel body is driven by the second support drive member, and (C) shows a state in which the barrel body is driven by the first support drive member from the state of (B).

FIG. 49 is a perspective view of a main part of a lens frame support mechanism showing a fifth embodiment of the present invention.

FIG. 50 is a perspective view of a main part of a lens frame support mechanism showing a conventional example.

FIG. 51 is a perspective view of a main part of a lens frame support mechanism showing another conventional example.

52 is a plan view of relevant parts showing the respective operating states of the conventional lens frame supporting mechanism of FIG. 51, (A) showing a neutral state, and (B) showing a lens barrel main body by a second support driving member. Shows the state of driving.

53 is a bottom view of a main part in each operating state of the conventional lens frame supporting mechanism of FIG. 51, in which (A) corresponds to (A) of FIG. 52 and (B) of FIG. ) Is supported.

54 is a view showing each operating state of the lens frame support mechanism of FIG. 51, (A) is a view on arrow A of (B) of FIG. 52, and (B) is (A) above. FIG. 6 is a view showing a state in which the lens barrel body is driven by the first support drive member from the state of FIG.

55 is a view on arrow B of FIG. 54 (B).

[Explanation of symbols]

6a, 6b, 26, 36, 46 ……………… Drive shaft (drive unit, support unit) 7a, 7b, 31d, 41d, 51d, 61d, 71d
……………… Face gear (gear, driven part) 8a, 8b, 38, 48 ………… Drive gear (gear, drive part) 9a, 9b, 29, 31e, 41e, 51e, 61e,
71e ... V-groove (supported portion) 10, 10A, 31, 41, 51, 61, 71 ...
………… Independent rotation member 15 ……………………………… Supporting part 16,16A, 32,42,52,62,72 …………
…………………… Main body 16a ……………………………… Spherical surface (supported part) 27 …………………… Large bevel gear (gear, driven part) 28 …… ………… Small bevel gear (gear, drive part) 31a, 41a, 51a, 61a ……………… Slot (guide part for centering drive) 41b, 41c, 61b, 61c, 71b, 71c… …
……… Rib-shaped projections (projection-shaped support portions) 51b, 51c …………… Pin-shaped projections (projection-shaped support portions) 103, 123, 133, 143, 183 …………
……………… Lens barrel main body 103a ……………… Guide grooves (motion restriction part) 103b, 123b, 133b, 183b …… Spherical surface part (friction transmission member, driven, supported part) 104 …… ……………… First support drive member (friction transmission member, support section, drive section) 105 ……………… Second support drive member (friction transmission member, support section, drive section) 110 …… Rotation restriction pin (motion restriction section) 111, 121 ... Independent rotation member (friction transmission member, supported section, driven section) 136 ... Guide member (motion) Restriction part) 136a ........................ Guide groove (motion restriction part) 144 .............. Independent rotation member 146 .................... Pinion (drive part) 186, 187 .. Sound wave oscillator (drive unit, support unit) G ………………… Center of rotation of the lens barrel body

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Matsu ▲ Maki ▼ Miki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd.

Claims (7)

[Claims] 1. A lens barrel main body, a support portion for supporting the lens barrel main body rotatably in an arbitrary direction around an approximately one point in the lens barrel main body, and the lens barrel main body supported by the support portion. At least two drive units that rotate in a state, a driven unit provided in the lens barrel body, and a lens barrel body light provided in the lens barrel body and arranged at a predetermined position on the outer surface of the lens barrel body. An independent rotation member that is rotatable about an axis that is substantially parallel to a plane perpendicular to the axis and that has at least one driven portion provided therein. mechanism. 2. The driving part and the driven part are composed of gears, one driving gear center axis is aligned with the other driving gear center axis, and the other driving gear center. The axis coincides with the center axis of rotation of the rotatable independent rotating member, and the center axis of each driving gear and the center axis of the driven gear are orthogonal to each other. 2. The lens frame support mechanism according to claim 1, wherein the center of rotation coincides with the intersection of the center axes of the driven gears. 3. The lens frame support mechanism according to claim 1, wherein the driving portion and the driven portion are constituted by friction transmitting members. 4. The lens frame support mechanism according to claim 1, 2 or 3, wherein the lens barrel main body has a motion restricting portion for restricting rotation around the optical axis. 5. The lens frame support mechanism according to claim 1, 2 or 3, wherein the supported portion is a spherical surface. 6. The lens frame support mechanism according to claim 2, wherein a centering drive guide portion is provided on the outer surface of the independent rotating member. 7. The lens frame support mechanism according to claim 2, wherein a projection-shaped support portion is provided on the outer surface of the independent rotating member.