JPH06242364A - Zoom lens device - Google Patents

Abstract

PURPOSE:To make a device small in size and light in weight, and to improve portability though variable power width is wide by regulating rotation by a rotation regulating means so that a lens holding frame may not be rotated while the lens holding frame is moved in an optical axis direction. CONSTITUTION:A biasing spring 7 has function for regulating rotation so that a screw 3a may not be rotated with the rotation of a nut 6 being an engaging member because the nut 6 is engaged when a motor is rotated. As the result of rotating action, the lens holding frame 4 is moved in the optical axis direction with a shaft by the action of the screw by the rotation of the nut 6 with the rotation of the motor 11. Furthermore, the spring 7 is provided with a function that such relation is always kept even when vibration and impulse are caused. Namely, a butting boss 5, the spring 7, and a pin 9 have not only the action for regulating the rotation of the lens holding frame 4 of the front group lens(FC lens) but also action for aligning the optical axis of the FC lens.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zoom lens device for driving a lens in a camera, and more particularly to a zoom lens device mounted on a video camera or the like and having a large change range of zoom magnification.

[0002]

2. Description of the Related Art Conventionally, it is known that a zoom lens can be used as a lens of a camera to change the photographing magnification steplessly. As a specific mechanism, for example, a mechanism in which the lens is moved in the optical axis direction by utilizing a configuration for converting the rotational movement of the male screw member into a rectilinear movement is well known. However, in general, the mechanism tends to be complicated, and it is necessary to easily switch the photographing magnification for cost reduction.

On the other hand, as a means for switching the magnification with a relatively simple mechanism, in a camera of the type in which the photographing magnification is largely changed by exchanging the lens, the interchangeable lens is relatively large and heavy, and therefore it is handled with difficulty. Not only was it inconvenient, but it was also inconvenient to carry.

Nowadays, with the spread of small-sized video cameras with a particular emphasis on portability, there has been a demand for small and lightweight lens units for video cameras. Not only that, the width of the change in the magnification that cannot be handled by the conventional variable power width is required, and the conventional lens moving mechanism has to increase the moving amount of the lens. In addition, in order to increase the amount of movement of the lens, the lens unit becomes large in size, which is incompatible with the downsizing and weight reduction in order to improve portability and handleability.

Therefore, in order to solve this problem, the present applicant applied as Japanese Patent Application No. 63-253864 (Japanese Patent Laid-Open No. 2-101410), in which the lens on the optical axis is moved away from the optical axis to increase the magnification. We have realized a zoom lens device that has a wide range of changes and is compact and lightweight.

Further, it is demanded to solve the problems of improvement of portability and handleability, and to realize a camera equipped with a zoom lens having a wide zooming width, which is convenient.

[0007]

Therefore, an object of the present invention is to meet the above-mentioned demand, in particular, the range of change in magnification is wide,
By providing a zoom lens device having a simple structure, it is possible to provide a zoom lens device for a camera that has a wide zoom range, is compact and lightweight, and is excellent in portability.

[0008]

That is, according to the present invention, in a zoom lens device to which a lens holding frame of a lens having a moving means capable of moving in the optical axis direction is attached, the zoom lens device is provided with the moving means in the optical axis direction. A lens holding frame for holding the lens, which has a rotating means rotatable about an axis parallel to the axis, and a moving means movable in the optical axis direction, an engaging portion provided on the lens holding frame, An engaging member that engages with the engaging portion; and a first transmitting unit that transmits the power for moving the lens holding frame in the optical axis direction by linking the engaging portion and the engaging member, The driving device for rotating the engaging member, and the power of the rotating means for connecting the engaging portion of the lens holding frame and the engaging member to rotate the lens holding frame about an axis parallel to the optical axis. Second transmission means for transmitting the A rotation restricting means for restricting rotation of the holding frame, wherein the rotation restricting means restricts the lens holding frame from rotating during movement of the lens holding frame in the optical axis direction. The solution of the above problems is achieved by the lens device.

[0009]

According to the present invention, there is provided a first transmission which has a lens holding frame rotatable about an axis parallel to the lens optical axis and movable in the optical axis direction, and which moves the lens holding frame in the optical axis direction. Second means for rotating the lens holding frame
The transmission means and the two transmission means are combined with each other so that one of the transmission means can be selected at any time to arbitrarily switch the movement and rotation of the lens holding frame.

The lens or lens group held by the lens holding frame is separated from the optical axis when the lens holding frame rotates as a result of the operation of the lens holding frame.
When the lens holding frame moves in the optical axis direction, the lens moves in the optical axis direction. Further, by rotating the lens holding frame in the opposite direction to the rotation when the lens is detached, the detached lens can be restored to the position on the optical axis again.

The lens moving operation and the lens separating operation cannot be performed at the same time, and they are not necessary. Further, the detachment operation can be performed at any position on the movement path of the lens. Also, since the lens holding frame after detachment can also be moved in the optical axis direction,
It is also possible to return from the detached state at any position.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 relate to the first embodiment. FIG. 6 is a diagram of two transmission members of the second embodiment. 7 to 9 relate to the third embodiment.

(Embodiment 1) A case where the zoom lens device according to the present invention is applied to a front lens group (hereinafter referred to as an FC lens) of a zoom lens for a video camera will be described below. A case where the present invention is applied to a zoom lens barrel that uses a box-shaped lens barrel (FIG. 10) as the lens barrel will be described in detail based on Embodiment 1 (FIGS. 1 to 5). In the box-type lens barrel 1, it is generally easier to arrange other members near the outside of the housing of the lens barrel than the cylindrical lens barrel. In this embodiment, bearings 2a and 2b are fixed by caulking to the shaft support 1a having a substantially U-shape. Further, the lens holding frame 4 holding the FC lens,
The shaft 3 is fixed by caulking or the like in parallel with the optical axis 0-0 'of the FC lens, or the lens holding frame 4 and the shaft 3 are formed by one member. By inserting the shaft 3 into the bearings 2a and 2b, the lens holding frame 4 is supported by the shaft support portion 1a in a rotatable state about the shaft 3 and movable in the optical axis direction. The FC lens can be replaced with a single lens. The method of fixing the shaft 3 to the lens holding frame 4 can be performed by a method other than caulking.

The first transmission means for moving the lens holding frame 4 along with the movement of the shaft 3 thus supported in the optical axis direction is constructed as follows. At the end of the shaft 3 opposite to the side where the lens holding frame 4 is attached, a screw 3a is cut as an engaging portion toward the lens holding frame 4 side,
The nut 6 which is an engaging member is engaged by screw fitting. That is, the first transmission means is configured by providing an engaging portion on a part of the frame and screw-engaging with the engaging member. The total length of the screw 3a should be longer than the sum of the moving distance when the shaft 3 moves in the optical axis direction and the length of the female screw of the nut 6, and some margin should be added. Further, a gear 6a is provided on the outer periphery of the nut 6 so as to form a gear portion that meshes with a gear 8 attached to an output shaft of a motor 11 fixed to the shaft supporting portion 1a. The first transmission means and the shaft 3 are linked to move the lens holding frame 4.

Further, as shown in FIG. 1, a pin 9 (hereinafter simply referred to as a pin) for positioning the optical axis of the lens holding frame 4 for holding the FC lens is provided on the shaft supporting portion 1a as an optical axis 0-0 '. It is mounted in parallel. When using the FC lens, the abutting boss 5 formed integrally with the lens holding frame 4 is abutted against the pin 9 as shown in FIG. The optical axes of are designed to match. As shown in FIG. 4, the bias spring 7 contacts the butting boss 5 so that the butting boss 5 contacts the pin 9.
It is installed like. The length of the pin 9 is such that, even when the abutment boss 5 moves along with the movement of the lens holding frame 4 in the optical axis direction, the abutment boss 5, the bias spring 7, and the pin 9
Therefore, it is necessary to have a sufficient length to sufficiently regulate the rotation described later. When the motor 11 rotates, the biasing spring 7 has a rotation restriction action for preventing the screw 3a from rotating along with the rotation of the nut 6 as an engaging member due to the engagement. As a result of this rotation restriction action, the lens holding frame 4 moves along with the shaft in the optical axis direction by the action of the screw by the rotation of the nut 6 accompanying the rotation of the motor 11. Further bias spring 7
Has a function to keep this relationship constantly even by vibration and shock.

That is, the abutment boss 5, the biasing spring 7, and the pin 9 have a function of restricting the rotation of the lens holding frame 4 of the FC lens and a function of positioning the optical axis of the FC lens. In addition, as shown in FIG. 1, springs 12 are installed between the shaft support portion 1a and the lens holding frame 4 so as to urge them in directions away from each other. Therefore, the axis 3 is parallel to the optical axis,
The nut 6 that is biased from the screw 3a side toward the holding frame 4 and screw-fitted into the screw 3a comes into contact with the wall surface of the shaft support portion 1a. Maintained. That is, the rotation of the motor 11 causes the screw 3a to be constantly pushed in the direction of the lens holding frame 4 from the screw 3a side by urging the shaft 3 in the above direction, and the backlash of the screw 3a and the nut 6 disappears. To do.

The operation of the first embodiment will be described below.

First, the first movement of the lens in the optical axis direction
The operation of the transmission means will be described. When the required amount of movement of the FC lens is 2 mm and the operation time is 1 second, the pitch of the screw 3a is 0.5 mm and the gear ratio between the gear 8 and the gear 6a is 1:
Assuming that the number is 3 (module 0.4 in the present embodiment, the number of gear teeth is 12, and the number of gear teeth 6a is 36), the rotation speed of the motor 11 is set to 12 rps. If the total weight of the lens holding frame 4 is about 30 g, the screw 3a including the spring 12 is included.
The maximum axial load of is about 100g, and considering the friction coefficient between the screw 3a and the nut 6 to be about 0.2,
The required torque of the screw 3a is about 7 g · cm. If the safety factor is 3, the gear ratio is 1: 3, so the motor
The required torque of 10 is about 7g · cm. Considering here that the rotation speed of the motor is 12 rps, the pulse rate corresponding to this rotation speed is 240 rps if an average stepping motor with 20 pulses per rotation is used in 2-2 phase excitation.
Therefore, the torque at the pulse rate in the vicinity of this is most appropriate because the most frequently used PM type stepping motor of φ12 to φ15 is just about 7 to 8 g · cm with an input of several volts. Of course, instead of the stepping motor, another motor corresponding to this rotation speed and torque, for example, a DC motor may be used, but an encoder or the like is additionally required to obtain the lens position information. In the case of a stepping motor, an open loop control can be performed directly by digital, so an encoder is not necessary and it is rather inexpensive.

Next, the structure of the second transmission means and the operation of separating the lens from the optical axis will be described. Reference numeral 101 designates a bimetal made of an electric heating type shape memory alloy, and two bimetals 101 of the same shape are fixed so as to face the shaft as shown in FIG. As shown in the perspective view of the bimetal 101 in FIG. 5, the bimetal 101 includes a fixing portion 101a and a transformation portion 101b. The two bimetals 101 are fixed to the nut 6 at 101a so that each 101b has a slight clearance with the shaft 3. When electricity is applied by a lead wire (not shown), two bimetals 101, which are bimetals, sandwich the shaft 3 from both sides, and the shaft 3 and the nut 6 are integrated. Shaft 3 and nut 6
When the motor 11 is rotated when the
Is rotated in the direction of the arrow in FIG.
Leave from 0 '. Of course, the bimetal 101 is not limited to this, and a piezoelectric film or the like having an equivalent action may be used. When returning from the disengaged position to the optical axis position, the bimetal 101 is energized again to integrate the shaft 3 and the nut 6, and then the motor 11 is rotated in the opposite direction to the disengagement operation. The reverse rotation is performed until the bias spring 7 gets over the pin 9 and the optical axis positioning pin 9 comes into contact with the butting boss 5. The second transmission means and the shaft 3 are linked to rotate the lens holding frame 4.

In this case, the torque of the motor 11 must be such that the biasing spring 7 that abuts the pin 9 and the abutment boss 5 that abuts the pin 9 can get over the pin 9. In this example, the input voltage to the motor was set so that the output torque was about 30 g · cm at the output rotation speed of about 24 rpm. Detachment angle θ = 75 ° is completed in about 1 second.

The position of the lens holding frame 4 when detached is set to 4
Denote by a. Disengagement means that the lens or lens group held by the lens holding frame 4 is retracted to a position where it does not intersect the optical paths of other lenses not held by the lens holding frame 4, and for that purpose the lens The holding frame 4 also needs to be retracted from the optical path. It should be noted that the completion of disengagement is in a state shown by 4a in the figure when the holding frame 4 abuts against the pin 10 for positioning the detachment of the lens holding frame 4, and the motor current value changes when the output shaft is forcibly stopped. Therefore, the completion of leaving can be detected. The photographing operation may be controlled by using this signal. Further, when the lens holding frame 4 is returned to the optical axis position, it can be detected by a similar method when the abutment boss 5 hits the pin 9 for positioning the optical axis of the lens holding frame 4.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG.

In the second embodiment, regarding the second transmission means,
In Example 1, the thing which used the bimetal 101 made from the electric heating type shape memory alloy of FIG. 1 was changed to the nut 202 and the nut 203 of FIG.
And a spring 201 are replaced. The other parts are the same as those in the first embodiment, and the description thereof will be omitted.

Similar to the first embodiment, the shaft 3 is rotatably and movably held by the shaft supporting portion 1a, and the shaft 3 is cut with a screw 3a as an engaging portion. The screw 3a is engaged with a nut 202 and a nut 203, which are engaging members, by screw fitting, and a spring 201 made of an electric heating type shape memory alloy is sandwiched between the nut 202 and the nut 203. On the outer circumferences of the nut 202 and the nut 203, a gear 202a and a gear 203a are respectively provided.
Is formed, and the gear 202a and the gear 203a are the shaft support portion 1
It meshes with a gear 8 attached to the output shaft of a motor 11 fixed to a. The nut 202 and the nut 203 form a first transmission means together with the screw 3a, and in addition, the nut 202
And the nut 203 together with the spring 201 form a second transmission means.

Here, the distance between the nut 202 and the nut 203 is X cm.
And A spring 201 made of an electric heating type shape memory alloy is formed to have a natural length of about X cm at room temperature and is inserted between a nut 202 and a nut 203. When this energization heating type shape memory alloy spring 201 is energized by a method not shown,
Natural length (X +)
δ) Transform into cm. However, the two nuts 202 and 2
Since both 03 are screw-fitted to the screw 3a, the distance remains Xcm. In other words, at high temperature, this spring 20
1 is naturally compressed by δ cm from the natural length (X + δ) cm. The spring constant of this spring 201 at high temperature is kg / cm
Then, these two nuts 202 and 203 are approximately k · δ.
It will be urged in the direction of pulling each other apart by the force of g. When the motor 11 is rotated in this state, the nut 202 with respect to the screw 3a is compared to when the spring 201 is at room temperature.
Since the axial load between the nut 203 and the nut 203 is increased by kδg, the required rotational torque is increased by a corresponding amount. k · δg is sufficiently large and a torque corresponding thereto is generated by the biasing spring 7 that brings the pin 9 of the lens holding frame 4 into contact with the abutment boss 5 abutting the pin 9 as described in the first embodiment. When the torque that can be exceeded 9 is exceeded, nut 202, nut 203 and screw 3
a does not make relative movement, and the shaft 3, the nut 202 and the nut 203 rotate together. In other words, the FC lens will come off.

In this embodiment, the shaft can be disengaged by applying a torque of about 90 g · cm, and the corresponding k ·
δg is the screw 3a, the nut 202, and the nut 203 of this embodiment.
Since it corresponds to about 1 kg, the spring constant kg /
cm and compression difference δ cm were designed. Further, when the energization is stopped, the spring 201 naturally returns to a natural length of approximately X cm by natural cooling at room temperature, and k · δg = 0 g. Even if it says natural cooling, the net volume that makes up the spring 201 is very small, and for such a system, it can be cooled almost at an almost instant.

This method is extremely simple, and since the actuator has only one spring, the material cost and the manufacturing cost are very low, and the purpose can be realized.

(Embodiment 3) An embodiment 3 in which a lens moving motor for moving a lens in the optical axis direction and a lens detaching motor for detaching a lens from the optical axis are independent of each other. Will be described with reference to the drawings (FIGS. 7 to 9).

In the third embodiment, similarly to the first embodiment, the shaft 3 is rotatably and movably held by the shaft supporting portion 1a, and the shaft 3 is cut with a screw 3a as an engaging portion. A nut 6 as an engaging member engages with the screw 3a by screw fitting to form a first transmitting means. A gear 6a is cut in the nut 6 and meshes with a gear 8 attached to an output shaft of a motor 11 fixed to the shaft support 1a to form a first drive device. The rotation restriction by the butting boss 5, the biasing spring 7, and the pin 9 is also the same as that in the first embodiment. The rotating force of the motor 11 rotates the gear 8 to move the shaft 3 in the optical axis direction via the nut 6.

The structure of the second transmission means is different from that of the first embodiment. That is, the gear 303 is integrally formed on the lens holding frame 4, and the detaching motor 30 for detaching the lens holding frame 4 fixed to the shaft supporting portion 1a forming the second drive device is used.
The second gear meshes with the gear 302 attached to the output shaft of the first
Constitutes a transmission means of.

Further, between the shaft support portion 1a and the gear 303 integrated with the lens holding frame 4, springs 12 for urging the gears 303 away from each other are installed to function to eliminate backlash. To have. However, the position of the spring 12 is at this position because the lens holding frame 4 and the gear 303 are integrally formed, and therefore the lens holding frame 4 and the shaft support portion 1a.
Other shapes may be used as long as they can be urged in a direction in which they are axially separated from each other. This point is the same as in the first embodiment.

Now, when the moving motor 11 for moving the lens holding frame 4 is rotated, the nut 6 rotates and the action of the screw moves the lens holding frame 4 together with the shaft 3 in the optical axis direction. The reason why the shaft 3 does not rotate together with the rotation of the nut 6 is that the action of the pin 9 and the abutment boss 5 serves to position the optical axis of the FC lens and also acts to regulate the rotation of the lens holding frame 4. is there. The optimum motor, gear ratio, etc. for this embodiment are the same as those described in the first embodiment. On the other hand, when the detaching motor 301 for detaching the lens holding frame 4 is rotated, the shaft 3 is rotated via the gear 302 and the gear 303, and the lens holding frame 4 is detached. This motor 301 needs a motor having a torque such that the biasing spring 7 that abuts the pin 9 of the lens holding frame 4 and the abutment boss 5 abutting on the pin 9 can get over the pin 9. A DC motor with a reduction gearbox was used, which can freely design the rotation speed and output torque to some extent. In this example, the gear ratio of the gear 302 and the gear 303 is 1: 2 (module 0.4, the number of teeth of the gear 302 is 16, the number of teeth of the gear 303 is 32), and the output torque is about 50 g · cm and the output rotation speed is about 24 rpm. Using, the separation angle θ = 75 ° is completed in about 1 second. The position of the lens holding frame 4 when detached is shown by 4a. During the rotation of the lens holding frame 4 when the lens holding frame 4 is disengaged, the nut 6 is still in mesh with the gear 8 of the motor 11 and therefore does not rotate. Therefore, when the lens holding frame 4 is detached, the lens retaining frame 4 is detached by a pitch corresponding to the detachment angle in the optical axis direction, and in this case, it is detached by left rotation, so that the lens holding frame 4 is rotated leftward, that is, in the direction away from the shaft supporting portion 1a, while rotating about 0.1 mm. break away. In the first place, since the FC lens is in a state of not being used in this state, no matter how much the positional deviation occurs, it does not matter.
If there is a problem for some reason, the exit angle θ =
The nut 6 may be reversely rotated by using the motor 11 that moves the lens holding frame 4 by 75 °. When the lens holding frame 4 comes into contact with the pin 10 for positioning the lens holding frame 4 as shown in FIG. 4a, the output shaft of the motor 301 for separating the lens holding frame 4 which is a DC motor is forcibly completed. Since it can be stopped at, if you monitor the current value of this motor,
When the output shaft is forcibly stopped, the motor current value suddenly rises, and it is possible to recognize the completion of disengagement. In addition, the lens holding frame 4
When returning to the optical axis position, it can be detected by the same method as when the butting boss 5 hits the pin 9.

Although the embodiment has been described above, in addition to this, the lens holding frame 4 and the nut 6 may be integrally configured. In this case, the shaft 3 is rotatably attached to the box-shaped lens barrel 1 so as not to move in the optical axis direction.
In the first to third embodiments, when the shaft 3 moves in the optical axis direction and the lens holding frame 4 fixed to the shaft 3 is driven, the lens holding frame 4 and the nut 6 are integrally formed. In the above, the integrally constructed member moves or rotates in the optical axis direction with respect to the shaft 3, and as a result of the rotation, the lens holding frame 4 performs the detaching operation.

Further, by forming the biasing spring 7 from a bimetal made of an electric heating type shape memory alloy, the rotation of the lens holding frame 4 can be restricted. For example, when the rotation is not restricted, the bias spring 7 is deformed at an arbitrary timing, and as a result, the abutment boss 5 is deformed into a shape in which the pin 9 is not abutted, the shaft 3 Rotates with the nut 6, the lens holding frame 4 is removed.
In this case, it is not necessary to apply a large torque to get over the pin 9.

Regarding the positional relationship among the abutment boss 5, the biasing spring 7, and the pin 9 which constitute the rotation restricting means of the lens holding frame 4, in all of the first to third embodiments. Although the pin 9 is provided on the box-shaped lens barrel 1 and the abutment boss 5 and the side spring 7 are provided on the lens holding frame 4, the abutment boss 5 is provided on the box-shaped lens barrel 1 and the pin 9 is attached to the lens. It is also possible to provide it on the holding frame 4.

[0036]

As described above, according to the present invention, it is possible to realize a zoom lens device having a simple structure and a wide range of magnification as compared with a conventional zoom lens device.

[Brief description of drawings]

FIG. 1 is a side sectional view of a first embodiment according to the present invention.

FIG. 2 is a rear view of the first embodiment according to the present invention.

FIG. 3 is a top view of the first embodiment according to the present invention.

FIG. 4 is a front view of the first embodiment according to the present invention.

FIG. 5 is an enlarged perspective view of an electric heating type shape memory alloy of Example 1 according to the present invention.

FIG. 6 is a side sectional view of a main part of a second embodiment according to the present invention.

FIG. 7 is a side sectional view of a third embodiment according to the present invention.

FIG. 8 is a top view of a third embodiment according to the present invention.

FIG. 9 is a front view of a third embodiment according to the present invention.

FIG. 10 is a perspective view of a box-shaped lens barrel used in the zoom lens barrel according to the present invention.

[Explanation of symbols]

 0-0 'Optical axis 1 Box type lens barrel 1a Shaft support 2a, 2b Bearing 3 Shaft 3a Screw 4 Lens holding frame (optical axis position) 4a Lens holding frame (disengagement position) 5 Butt boss 6 Nut 6a Nut gear 7 Offset spring 8 Motor output shaft gear 9 Pin for optical axis positioning 10 Pin for disengagement positioning 11 Motor 12 Backlash prevention spring 101 Bimetal 201 Bimetal spring 202 First nut 203 Second nut 202a No. First nut gear 203a Second nut gear 301 Second motor 302 Second motor output shaft gear 303 Lens holding frame integrated gear

Claims (4)

[Claims] 1. A zoom lens device in which a lens holding frame of a lens having a moving means movable in the optical axis direction is attached, and the zoom lens apparatus is rotatable about an axis parallel to the optical axis together with the moving means in the optical axis direction. A lens holding frame for holding the lens, which has various rotating means, a moving means movable in the optical axis direction, an engaging portion provided on the lens holding frame, and an engaging portion for engaging the engaging portion. A drive unit for rotating the engagement member, the member, and a first transmission unit that transmits the power for moving the lens holding frame in the optical axis direction by linking the engagement portion and the engagement member. Second transmitting means for transmitting power of a rotating means for connecting the engaging portion of the lens holding frame and the engaging member to rotate the lens holding frame around an axis parallel to the optical axis, Rotation restriction for restricting rotation of the lens holding frame Means for restricting rotation of the lens holding frame so that the lens holding frame does not rotate during movement of the lens holding frame in the optical axis direction. 2. A zoom lens device to which a lens holding frame of a lens having a moving means capable of moving in the optical axis direction is attached, which is rotatable about an axis parallel to the optical axis together with the moving means in the optical axis direction. A lens holding frame for holding the lens having different rotating means, the moving means in the optical axis direction includes an engaging portion provided on the lens holding frame, and an engaging member engaging with the engaging portion. A first transmission means formed by connecting the first transmission means and rotating the engagement member;
Drive device, a second transmission means provided on the lens holding frame, a second drive device for rotating the lens holding frame via the second transmission means, and rotation of the lens holding frame. Rotation controlling means for restricting, the first transmitting means transmits the power of the moving means for moving the lens holding frame in the optical axis direction, and the second transmitting means rotates the lens holding frame. Transmits the power of the rotating means to
The zoom lens device, wherein the rotation restricting means restricts the lens holding frame from rotating during movement of the lens holding frame in the optical axis direction. 3. A zoom lens device to which a lens holding frame of a lens having a moving means movable in the optical axis direction is attached, the zoom lens apparatus being rotatable with the moving means in the optical axis direction about an axis parallel to the optical axis. The lens holding frame for holding the lens and the moving means in the optical axis direction having different rotation means are connected with the engaging portion provided on the lens holding frame and the engaging member engaging with the engaging portion. And a driving device for rotating the engagement member, which has a first transmission means for transmitting power for moving the lens holding frame in the optical axis direction, an engagement portion of the lens holding frame, and the engagement member. And a rotation restricting means for restricting rotation of the lens holding frame and a second transferring means for transmitting power of a rotating means for rotating the lens holding frame about an axis parallel to the optical axis. And the second transmission means is movable. When the force is transmitted, the rotation regulation of the rotation regulation means is released, and when the second transmission means transmits the power in the direction opposite to the power, the rotation regulation is changed from the deregulation state to the regulation state again, The lens holding frame moves in the optical axis direction when the first transmission means transmits the power when the rotation regulating means is in the regulated state, and the lens holding frame when the second transmission means transmits the power. The zoom lens device is characterized in that the frame is separated from the optical axis. 4. The zoom lens device according to claim 3, wherein the second transmission means for transmitting the power is made of an electric heating type shape memory alloy.