JPH09171203A - Moving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the compact housing of a moving member possible and to prevent the member from being withdrawn to a housing side by external force and from making the device inoperative by providing the device with a region moving without making relative movement and a region moving while making relative movement therewith. SOLUTION: The first moving member 52 moves in an arrow direction D6 when a driving member 54 moves a driving section SA which is a first driving region in an arrow direction D5. At this time, the second moving member 53 moves integrally with the first moving member 52 as well and their respective pins 52c, 53a move to positions P2, P4. When the moving member 54 moves the driving section SB which is the second driving region similarly in the arrow direction D5, the first moving member 52 moves slightly in the arrow direction D6 and the pin 52c moves to the position P3. At this time, the second moving member 53 is driven in an arrow direction D7 and the pin 53a moves relatively on the moving member 52 up to the position P5. Even if the moving member receives the external force in the first driving region, the member does not turn and is, therefore, prevented from being withdrawn in the housing direction and from making the device inoperative in the photographing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving device, and more particularly to a moving device having a moving member that moves relative to a fixed guide member.

[0002]

2. Description of the Related Art Conventionally, a zoom lens built-in camera disclosed in Japanese Patent Laid-Open No. 2-6914, which has been proposed for a forward / backward drive mechanism of a zoom lens of a camera, has a zoom lens frame in a zoom cam groove of the zoom lens inside the camera body. The present invention relates to a mechanism in which a collapsing cam groove for accommodating the same is continuously provided.

A brush position adjusting device for a zoom lens barrel disclosed in Japanese Utility Model Laid-Open No. 5-84914 relates to a zoom lens barrel capable of flexibly adjusting a relative position between a code plate and a brush position. Is. The multi-stage extension zoom lens barrel disclosed in Japanese Patent Laid-Open No. 7-63976 is a zoom lens barrel that moves a plurality of lens groups along a predetermined movement locus, and the multi-stage extension is short in the stored state. It relates to a possible zoom lens.

On the other hand, in recent years, a plastic mold lens frame to which a helicoid screw mechanism is applied has been widely used in view of cost and easy manufacture of a complicated shape with high precision. In order to precisely fit the helicoid screw, the roundness of the lens frame, the shape of the screw thread, the deviation of the shape split,
It is required that there is no burr or other slight deformation.

[0005]

However, in the camera with a built-in zoom lens disclosed in Japanese Patent Laid-Open No. 2-6914, the lens frame is housed during extension of the zoom operation, so that an external force is applied to the lens frame. When it was received, the lens frame would be retracted to the storage side, and shooting would not be possible, which was not convenient.

Further, in the structure for advancing and retracting the lens frame in the brush position adjusting device for the zoom lens barrel disclosed in the above-mentioned Japanese Utility Model Laid-Open No. 5-84914, in order to supply electric power to the shutter and the like in the lens frame and to transmit a signal. , Needed a long flexible board. Further, in the multi-stage extension zoom lens barrel disclosed in Japanese Patent Laid-Open No. 7-63976, for example, when an attempt is made to store a zoom lens having a long focal length in a thin body,
There is a problem that the number of stages of the lens frame increases, the outer diameter of the entire lens frame increases, and the length and width of the camera outer shape increase.

Further, in the case where the conventional plastic mold lens frame having the above-mentioned helicoid screw is applied, a large number of fittings are made, so that a portion causing clogging or rattling in the operating range is complicatedly entangled. , It was very difficult to fix the mold. Therefore, in order to obtain smooth rotation in the entire operating range, the amount of backlash must be increased,
It tends to cause deterioration of lens performance.

The present invention has been made in order to solve the above-mentioned problems, and the moving member can be compactly stored, and the movable member can be retracted by an external force without becoming inoperable. , Easy to miniaturize, and
It is an object of the present invention to provide a moving device which is easy to manufacture.

[0009]

A moving device according to claim 1 of the present invention comprises a fixed guide member and a first moving member which is moved by being guided by a first guide means provided on the fixed guide member. A second moving member held so as to be movable relative to the first moving member, and a second moving member provided on the fixed guide member.
By moving by being guided by the guide means,
A driving member for driving the second moving member, wherein the driving member has at least a first driving region in which the first and second moving members move without relative movement, and the first and second driving regions. And a second drive region in which the moving member moves while relatively moving.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Prior to a detailed description of the lens barrel that is the moving device according to the first embodiment of the present invention, an outline thereof will be described using a developed view of a main part of the mechanism in FIG. In addition, although this device is described as a moving device for the outline, it is applied to a lens barrel in the present embodiment described later.

As shown in the development view of FIG. 1, the present moving device is mainly provided with a fixed guide member 51 fixed to the main body of the device.
A movable first moving member 52, a second moving member 53 that can move relative to the first moving member, and a driving member 54 that drives the first moving member 52 and the second moving member 53. It is composed of.

The fixed guide member 51 is the first moving member 5
A guide groove 51a which is a first guide means for guiding the guide member 2 and a guide groove 51 which is a second guide means for guiding the drive member 54.
b. The first moving member 52 is the guide means 5
A pin 52a fitted with 1a and a pin 52c fitted with a cam groove 54b which is a driving means (first cam) of the driving member 54.
And a guide groove 52b that is a holding unit that holds the second moving member 53 so as to be relatively movable.

The second moving member 53 has a guide groove 52b.
And a pin 53a which is held by the cam groove 54c which is a driving means (second cam) of the driving member 54 and which is fitted. The drive member 54 also includes a pin 54a that fits into the guide groove 51b.

Next, the operation of the moving apparatus having the above structure will be described. First, in FIG. 1, when the drive member 54 moves along the guide groove 51b of the fixed guide member 51 in the drive section SA which is the first drive area thereof in the direction of arrow D5,
The moving member 52 is driven by the cam groove 54b and moves in the arrow direction D6 in FIG. At this time, the second moving member 53
Also moves integrally with the first moving member 52. Respective pins 52c and 53a move to positions P2 and P4.

That is, the cam groove 54c of the drive member 54
Since the groove shape is set so as to give the same displacement as that of the cam groove 54b of the drive member 54, the first moving member 52 and the second moving member 53 move together without relatively moving.

Subsequently, when the drive member 54 similarly moves the drive section SB which is the second drive area thereof to the arrow D5,
Since the cam grooves 54b and 54c have different shapes, the first moving member 52 slightly moves in the direction D6 of FIG.
Moves to position P3. At that time, the second moving member 53 is driven by the cam groove 54c, and is guided by the guide groove 52b.
1, the pin 53a relatively moves on the first moving member 52 to the position P5.

As described above, according to the present moving device, the second moving member 53 is driven in one direction by the movement of the driving member 54, and is first driven in a state in which the relative position of the first moving member 52 does not change, and then the relative movement. Driven while changing the position,
It is possible to perform two different types of driving.

The case where the above moving device is applied to the lens barrel of the camera according to the first embodiment of the present invention will be described in detail below with reference to FIGS. 2, FIG. 3 and FIG. 4 show half-sections of a camera incorporating a lens barrel, FIG. 2 shows a retracted state, FIG. 3 shows a wide state, and FIG. 4 shows a tele state. The lens frame built into the camera is a so-called two-group zoom lens barrel including a front lens group 1 having a positive power and a rear lens group 2 having a negative power.

In the above camera, an annular drive frame 8 which is a drive member driven by a motor (not shown) is provided on the outer periphery of a fixed frame 7 which is an annular fixed guide member fixedly supported by the camera body 10. Is inserted in a freely rotatable state. Further, a cam frame 6, which is an annular second moving member that constitutes the collapsible mechanism, is fitted in the inner peripheral portion of the fixed frame 7 so as to be rotatable and movable back and forth, and the inner periphery of the cam frame 6 is annular. The moving frame 5, which is the first moving member, is inserted.

The fixed frame 7 is provided with a straight guide groove 7a which is a first guide means and a circumferential escape groove 7b which communicates with the guide groove 7a. The drive frame 8 is provided with a cam groove 8a which is a drive means (first cam), a cam groove 8b which is a drive means (second cam), and a cam groove 8c which communicates with the cam groove 8b. ing. The cam grooves 8a and 8b are lead cams having the same lead angle. The drive frame 8 is regulated by a stop ring 7c which is a second guide means mounted on the fixed frame 7 so as not to move in the optical axis O direction with respect to the fixed frame 7.

The cam frame 6 is inserted rotatably around the movable frame 5 in a state where it does not move forward and backward relative to the movable frame 5 in the optical axis O direction.

The moving frame 5 and the cam frame 6 are respectively provided with
The moving pin 5a and the cam pin 6a are provided on the circumference in three equal parts. The moving pin 5a is fitted in the straight guide groove 7a of the fixed frame 7, and is further fitted in the cam groove 8b of the drive frame 8. The cam pin 6a is a linear guide groove 7 of the fixed frame 7.
Inserted in a with a gap in the collapsed state, wide, or
In the tele state, it can be inserted with a clearance with the escape groove 7b, and is also fitted with the cam groove 8a of the drive frame 8.

The front lens group 1 and the rear lens group 2 described above are
They are held by a 1Z (zoom) frame 3 and a 2Z frame 4, which are third moving frames, respectively. On the 1Z frame 3, 1Z pins 3a are arranged at three equal positions on the circumference. The 1Z pin 3a is fitted into three linear guide grooves 5b provided in the moving frame 5, and the front lens group 1 can be moved on the moving frame 5 in the optical axis O direction. Further, the 2Z frame 4 has 2Z pins 4
a is provided at three equal positions on the circumference, the 2Z pin 4a is fitted in the straight guide groove 5b of the moving frame 5, and moves in the optical axis O direction on the moving frame 5 like the 1Z frame 3. It is possible.

The cam frame 6 has a front group cam groove 6b fitted with the 1Z pin 3a and a rear group cam groove 6 fitted with the 2Z pin 4a.
c is provided to determine the positions of the front and rear lens groups 1 and 2 in the optical axis direction. The cam grooves 6b and 6c are provided at three places on the circumference, and a developed view of one of them is shown in FIG.
(A) and (B) show.

FIG. 5A shows the retracted state and the wide state, and FIG. 5B shows the telephoto state. By the rotation of the cam frame 6, the 1Z pin 3a, the cam grooves 6b, 6c,
The 2Z pin 4a is driven, and the 1Z frame 3 and the 2Z frame 4 have the optical axis O.
It moves back and forth in the direction and zoomed from wide to tele or from tele to wide.

The operation of the lens barrel of the present camera constructed as described above will be described with reference to the development view of FIG.
6A, 6B, and 6C show the moving pin 5 of the moving frame 5.
a, the cam pin 6a of the cam frame 6, the straight guide groove 7a of the fixed frame 7, the circumferential escape groove 7b, the cam groove 8a of the drive frame 8,
FIG. 7 is a development view showing the state of one of the three positions on the circumference in the collapsed state, the wide state, and the tele state for each of the cams 8b and 8c.

First, the operation of feeding from the retracted state to the wide state will be described. In the collapsed state, as shown in FIG. 6A, the moving pin 5a of the moving frame 7 and the cam pin 6a of the cam frame 6 are fitted in the straight guide groove 7a of the fixed frame 7, and as shown in FIG. The moving frame 7, the cam frame 6, the 1Z frame 3,
The 2Z frame 4 is retracted toward the imaging surface 9 side and stored. The positions of the moving frame 7 and the cam frame 6 at this time are referred to as first positions.

Then, when the drive frame 8 rotates in the direction of arrow D10, the moving frame 5 advances straight and is extended as shown in FIG. At the same time, the cam frame 6 also has the cam pins 6
Since a is fitted in the cam groove 8a, it goes straight and is extended without moving relative to the moving frame 5. Also, 1
Both the Z frame 3 and the 2Z frame 4 are extended to the wide position shown in FIG. The moving position of the moving frame 7 and the cam frame 6 is set to the second position.
Position. The rotation area of the drive frame 8 for driving from the first position to the second position, that is, FIG.
The rotation range in which the drive frame 8 rotates between the states of (A) and FIG. 6 (B) is referred to as a first drive area.

At this time, the cam pin 6a and the guide groove 7a
Has a fitting gap, so the manufacturing error of each part is
The cam frame 6 can escape by making a minute rotation within this gap. In the actual wide stop state, the drive frame 8 is rotated so that the moving pin 5a shown in FIG. 6B is located at the wide corresponding position W1 slightly past the cam inflection point position of the cam groove 8a. doing.

Next, the zoom operation will be described. Regarding zooming of the front lens group 1 and the rear lens group 2, FIG.
Since it has already been described with reference to, the driving operation of the moving frame 5 and the cam frame 6 by the driving frame 5 will be described here.

When the drive frame 8 is rotated in the direction of arrow D10 from the wide state of FIG. 6 (B) to the telephoto position of FIG. 6 (C), the moving pin 5a of the moving frame 5 moves in the direction of the driving frame 8. It is fitted in the cam groove 8c. Since the cam groove 8c is formed in a direction perpendicular to the optical axis O, the moving frame 5 does not move in the optical axis O direction and does not rotate during the wide-to-telescopic zoom operation.

On the other hand, since the cam frame 6 is attached to the moving frame 5 relatively in the optical axis O direction, the position of the cam pin 6a in the optical axis O direction does not change and the cam frame 6 does not change. Will rotate with the drive frame 6 without being further extended. At this time, an escape groove 7b is provided in the fixed frame 7 so as not to hinder the rotational movement of the cam pin 6a. The rotation range in which the drive frame 8 rotates from the state of FIG. 6 (B) to the state of FIG. 6 (C) is referred to as a second drive area.

As described above, in the lens barrel of this camera,
The movable frame 5 and the cam frame 6 are extended from the storage position to the vicinity of the wide position, which is a photographing position, by the rotation operation of the drive frame 8 in the first drive area. Further, the drive frame 8 is rotationally driven within the range of the second drive region, so that the 1Z pins 3a and 2Z are driven.
It is possible to extend the 1Z frame 3 and the 2Z frame 4 from the wide position to the tele position through the pin 4a and perform zooming, that is, a magnification changing operation. Further, in this lens barrel structure, even if the lens frame receives an external force in a wide state, the drive frame 8 does not rotate, so that the image cannot be taken by being pulled in the storage (collapsed) direction.

Although the case where the lens frame performs the zooming operation has been described in the present embodiment, the present invention is not limited to this, and may be applied to a lens frame structure for performing the focusing operation. Further, although the present embodiment is applied to the two-group zoom lens, it can be applied to three or more groups of zoom lenses.
Further, in terms of control, it is possible to adopt the same control method as the conventional lens frame drive control.

Next, a camera incorporating a lens barrel having a moving device according to a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The sectional view of FIG. 7 shows the collapsed state of the camera, and the sectional view of FIG. 8 shows the wide state.
The sectional view of FIG. 9 shows a telephoto state. The camera of the present embodiment is a shutter mechanism arranged in the lens frame of the camera of the first embodiment, that is, the 1Z frame 3,
It is characterized by an electric connection structure between an electric circuit of an AF lens drive mechanism (both not shown) and an electric circuit of the camera body side. Therefore, components other than the electric connection structure will be described with the same reference numerals as those of the camera according to the first embodiment.

In the 1Z frame 3, one end 11b of a flexible printed circuit board (hereinafter referred to as FPC) 11 is attached. One end 11b of the FPC 11 is
A shutter (not shown) in the 1Z frame 3 and an AF lens drive mechanism (not shown) are connected to a lens frame side electric circuit board, and electric power is supplied to a motor, an electromagnet, various sensors and the like, communication is performed.

The connecting portion 1 which is the end portion on the opposite side of the FPC 11
1a extends from the moving pin 5a portion to the outside of the drive frame 8 and is provided with a connecting portion corresponding to each line of the FPC 11. In addition, as shown in FIGS. 8 and 9, a U-shaped tarmi is provided in the intermediate portion between the connecting portion 11a and the end portion 11b so as to be able to move the 1Z frame 3 by zooming.

A contact 13, which is a connection member capable of elastic displacement, is provided at a position facing the connection portion 11a of the FPC 11, and in the collapsed state of FIG.
The contact 13 and the connecting portion 11a are separated from each other and are in a non-conductive state. However, in the shooting state of the wide or tele state of FIGS. 8 and 9, the pressure contact connection state is maintained, and the shutter and the AF lens can be electrically driven.

On the other hand, a camera body side electric circuit board 12 is provided on the camera body 10 side where the contacts 13 are provided, and a CP for controlling the drive of the shutter and the AF lens.
Electric circuit components such as U (not shown) are mounted and each control is performed.

Next, the operation state when the movable frame 5 in this camera is extended from the retracted position to the wide position, particularly the state of the FPC 11 and the connection state thereof, will be described with reference to FIG. As described above, the contact 13 can be elastically displaced. Therefore, when the moving frame 5 is extended to the vicinity of the wide position, the contact 13 and the FPC
When the movable frame 5 is extended to the wide position, the contact 13 retreats and connects to the connecting portion 11a at a predetermined contact pressure, and the circuit board 12 and the FP.
C11 is kept in an electrically connected state.

During the zoom operation, the 1Z frame 3 can be extended by utilizing the slack of the FPC 11 as in the conventional camera. The contact 13 may be formed of a leaf spring, or may be formed by combining a coil spring and a highly rigid connecting portion. Further, it goes without saying that the contact portion 13 on the main body side may be fixed by giving elasticity to the connecting portion 11a side of the FPC 11 on the lens frame side.

In the camera of the present embodiment configured as described above, the expensive FPC 11 can be shortened and the cost can be reduced. Furthermore, FPC
By shortening 11, the resistance of the pattern becomes smaller, and the motor, electromagnet, etc. can be driven efficiently. Conversely, if the resistance is the same as before, the pattern width can be made narrower and the FPC
By narrowing the width of 11, it is possible to improve the efficiency and reduce the cost. Also in the camera of the present embodiment, as described above, the forward / backward movement of the lens frame is not limited to the zoom operation, but has the same effect when applied to the focusing operation.

Next, a camera incorporating a lens barrel having a moving device according to a third embodiment of the present invention will be described with reference to FIG.
No. 0, FIG. 11 is a longitudinal sectional view of a retracted state and a telephoto state, a sectional view in the optical axis direction around the linear guide portion of FIG. 12 showing the features of the camera, and a developed view of FIGS. 13 to 15.

The lens barrel applied to the camera of this embodiment is a three-stage extension type two-group zoom lens barrel, and the first-group lens 21 and shutter unit 25 mounted on the 1Z frame 26 are The second group lens 22 that is zoom-driven by the lens moving mechanism and is held by the 2Z frame 20 corresponding to the zooming position is fed by the motor 24 to the feed screw 2
It moves through 3 and is driven back and forth.

In this camera, the camera body 33 has
A fixed frame 32, which is a fixed guide member, is attached. On the other hand, the drive frame 31, which is a drive member, is fixed to the camera body 33 via the pressing plate 34 of the second guide means in the optical axis direction, and is rotatably mounted around the fixed frame 32. The film 35 is located on the photographing surface on the rear side of the camera body 33.

As shown in FIG. 13, the drive frame 31 has a cam groove 31a of a driving means (first cam) for moving the guide frame A30 which is the first moving member, and a cam which is the second moving member. Driving means for rotating and driving the frame A29 (second
A cam groove 31b for the cam is provided. Further, the fixed frame 32 is provided with three straight guide key portions 32a which are first guide means which are guides of the guide frame A30.

In the above structure, the guide frame A30 corresponds to the moving frame 5 of the first embodiment, and the key portion 32a of the fixed frame 32 is provided.
Corresponds to the fixed frame guide groove 7a of the first embodiment. Further, the drive frame 31 is driven by a motor (not shown) as in the case of the first embodiment, but its action is the same as in the case of the first embodiment.

Since the cam pin A29a is fitted in the cam groove 31b of the drive frame 31, the cam frame A29 rotates together with the drive frame 31 during the zooming operation. This is the same as in the case of the first embodiment. Further, the cam frame A29 is provided with a groove 29d that engages with the protrusion 30c of the guide frame A30, and moves in the optical axis O direction together with the guide frame A30 and rotates around the guide frame A30. It is possible to install.

Further, on the cam frame A29, as shown in FIG. 14, the guide pin B2 of the guide frame B27 which is the third moving frame.
There are provided a cam groove 29b that fits with 7a and a rectilinear groove 29c that fits with the cam pin B28a of the cam frame B28 that is the third moving frame. On the other hand, on the guide frame A30, the key portion 3
0b are provided at 6 places on the circumference and are fitted with the guide frame B27. Therefore, the guide frame B27 is the guide frame A3.
It is held so as to be movable in the optical axis direction by 0 and not to rotate around the optical axis O.

When the drive frame 31 is rotated, the cam frame A2
9 is rotated via the cam pin 29a, and the guide frame B
27 is the key 30b of the guide frame A30 and the cam frame A29.
Will be fed out by the cam groove 29b. on the other hand,
The cam frame B28 is extended together with the guide frame B27 and is rotationally driven by the rectilinear groove 29c of the cam frame A29.

In the guide frame B27, 1 of the 1Z frame 26
A linear guide groove 27b that fits into the Z pin 26a is provided. Also, the protrusion 27c of the guide frame B27 and the cam frame B
Since the groove 28c of 28 is engaged, the guide frame B27 and the cam frame B28 are integrally movably held in the optical axis direction, and the cam frame B28 rotates around the guide frame B27. It will be supported as much as possible. Further, the cam frame B28 is provided with a lead cam 28b for driving the 1Z frame 26, and is fitted with the 1Z pin 26a of the 1Z frame 26.

In the lens barrel of the present camera having the above-described structure, in order to extend the lens barrel from the retracted position, the drive frame 31 is rotationally driven so that the guide frame A30 and the cam frame 29 move relative to each other. Instead, it is extended near the wide position. The rotation range of the drive frame 31 at this time is referred to as a first drive area.

Subsequently, when performing a wide-to-tele zooming operation, when the drive frame 31 is rotated in the wide state, the guide frame 30 does not rotate, and only the cam frame A29 is relatively moved via the cam pin 29a. Be rotated.
The rotation range of the drive frame 31 from the wide to the tele is the second.
The drive area.

The guide frame B27 is the guide frame A described above.
By the key 30b of 30 and the cam groove 29b of the cam frame A29, it is paid out. On the other hand, the cam frame B28 is extended together with the guide frame B27, and the cam frame A
It is rotationally driven by a straight groove 29c of 29.

In the guide frame B27, 1 of the 1Z frame 26
A linear guide groove 27b that fits into the Z pin 26a is provided. Therefore, when the cam frame B28 rotates, the 1Z frame 2
6 will be rolled out. The zooming operation in the 1Z frame 26 is as described above, and the detailed description of the operation is omitted because it is not directly related to the present invention.

As shown in FIG. 12, in the case of the camera of the present embodiment, the straight-moving guide member of the 1Z frame 26 which is straightly extended at the most distal end of the lens frame, that is, the straight-moving groove 27b of the guide frame B27.
By disposing the key portion 30b of the guide frame A30 and the key portion 32a of the fixed frame 32 with the same diameter, it is possible to reduce the outer diameter of the lens frame. FIG. 15 shows a developed view around the guide portion.

A cam generally used in a conventional lens frame,
When the leading edge of the lens frame is to be straightly extended by using the extension mechanism such as a helicoid, if the number of extension stages is n, the number of lens frames is 2n + 1. In this conventional lens frame structure, if the inner diameter of the endmost lens frame (corresponding to the 1Z frame 26 in the present embodiment) determined by the lens, shutter, etc. is d and the wall thickness of the frame is t, the lens frame is The outer diameter D0 of this is D0 = d + 2 * (2n + 1) * t.

On the other hand, in the case of the lens frame of the camera of the present embodiment, the number of frames does not change, but by arranging all the linear guide members in the same diameter, the number of feeding steps is n steps and the thickness increase in the radial direction is increased. Is n + 2, and the outer diameter D1 of the frame is D1 = d + 2 * (n + 2) * t. The outer diameter of the lens frame of the present embodiment is reduced by 2 × (n−1) × t, which is the difference.

In the example of this embodiment, the number of stages n is 3, and the number of frames is 2 × 3 + 1 = 7. The increase in the diameter of the mirror frame due to the wall thickness is (n + 2) × t, and when n = 3, it is 5 × t, and the number of frames contributing to the wall thickness increase is 5.

On the other hand, in the conventional lens frame structure, the increase in the diameter of the lens frame due to the wall thickness is (2 ×
2 + 1) × t, which is 5 × t, and the number of frames contributing to the increase in wall thickness is 5. Therefore, the lens frame of the camera of the present embodiment achieves three-stage extension with the same outer diameter as the conventional two-stage extension lens frame.

Further, in the case of the lens frame of the camera of the present embodiment, by adding the completely same constitutions as the guide frame A30 and the cam frame A29, four stages and five stages and the number of feeding stages n
It is also easy to increase. The number of feeding stages n
However, as the number increases, the difference between the outer shapes of the lens frame having the conventional structure and the lens frame having the structure of the present embodiment becomes larger, and the effect of the present embodiment appears.

In the example of the present embodiment, the features of the camera of the first embodiment are incorporated, but it is also possible to use a lens frame structure in which zooming and collapsing are continuous like a conventional lens frame. Applicable. At this time, the cam groove 31 of the drive frame 31
It suffices that a has a normal cam groove shape and the cam groove 31b has a straight-moving groove so that a structure like the cam frame 29 is formed.

Further, in the example of the present embodiment, the straight guide members are arranged in the same shape in three equal parts on the circumference, but the straight guide has the original function of restricting the rotation of the frame. Therefore, the straight-ahead guide member may be at any position on the circumference or in an unbalanced state. Of course, there is no problem even if one location is provided for each frame.

Further, in the example of the present embodiment, the fitting of the cam groove and the pin is used for the feeding mechanism, but it is also possible to use a hecoid mechanism as a modification thereof. Specifically, the cam groove 29b of the cam frame A29 may have a helicoidal female screw, and the cam pin 30a of the guide frame A30 and a helicoidal male screw may be used.

The drive frame 31 can also be replaced with a helicoid mechanism, as in the cam frame A30 section, if the drive frame 31 is structured so as to continuously perform zooming and collapsing as described above.
Further, since the straight-moving guide portion of the 1Z frame 26 portion is the straight-moving groove 27b, it cannot be helicoidized as it is, but in this embodiment, the straight-moving guide is arranged on the outer peripheral side of the 1Z frame 26. All are arranged inside the 1Z frame 26,
By making the guide frame B27 also key-shaped, it becomes possible to form a helicoid. By making the feeding mechanism a helicoid as described above, it is possible to increase the strength of the lens frame and to shield light between the lens frames by fitting the helicoid.

Further, in the example of the present embodiment, the conventional cam system is not applied as the zooming drive mechanism for the first and second lens groups, but the cam system can also be applied. It goes without saying that the present invention can also be applied to a lens frame having a large number of zoom groups such as 3 groups and 4 groups. Further, in the example of the present embodiment, the present invention is applied to the lens frame that performs the collapsing operation and the zoom operation, but the same applies to the focusing operation.

Next, a camera incorporating a lens barrel having a moving device according to a fourth embodiment of the present invention will be described with reference to FIG.
A description will be given with reference to a cross-sectional view of a helicoid screw portion of 6. As a modified example of the lens frame mechanism of the camera of the third embodiment described above, the advantage of using a helicoid screw for the feeding mechanism was described, but the helicoid screw also has a drawback, and the lens frame structure of the camera of the present embodiment is The problem is solved, and the advantages of the helicoid screw, such as rigidity and light-shielding property, are improved by the state of the multi-thread helicoid screw being engaged at many points.

Considering the case of a helicoidized plastic lens frame which has been widely used in recent years because of its low cost and easy manufacture of a complicated shape with high precision, the fitting of the helicoid screw is performed precisely. In order to carry out this, it is necessary that there is no roundness of the frame, deformation of the shape of the screw threads, misalignment of the shape division, burrs, and other slight deformation.

However, since the lens frame is fitted in a large number, the working range, that is, the parts that cause play or the like are intricately entangled with each other, and it is very difficult to correct the mold. Therefore, in order to obtain a smooth rotation in the entire operating range, the play must be increased, and the lens performance tends to be deteriorated. What solves the above problems is the lens barrel of the camera of this embodiment.

That is, as shown in the sectional view of FIG.
The feeding mechanism of the present embodiment is composed of a helicoid frame 41 forming a multi-thread helicoid female screw and a helicoid frame 42 forming a multiple helicoid male screw.

The helicoid frame 41 is formed with a conventional normal helicoid female screw. On the other hand, the helicoid frame 42 is formed with a male screw thread 42a and the remaining male screw thread 42b. is there. Further, the male screw thread 42b is formed smaller than the male screw thread 42a so as not to contact the screw of the helicoid frame 41 in a normal state.

In the lens frame of the camera of the present embodiment configured as described above, the fitting precision is limited by limiting the portion requiring precision to the male screw threads 42a provided at a plurality of positions of the frame 42. It becomes easy to improve. Further, when an external force acts on the lens frame and the lens frame is about to be deformed and strength is required, the remaining male screw threads 42b also come into contact at the same time, which is an advantage that the rigidity of the helicoid is high. In addition, it is possible to obtain a lens frame which is easy to manufacture and has high accuracy.

In the above-described embodiment, the fitting screw thread 42a having a small gap is provided on the male screw side, but it may be formed on the female screw side. In addition, the side on which the normal helicoid screw thread is formed (the side of the helicoid frame 41 in this embodiment) is a metal frame, and the side on which two types of screws for fitting and strength or light shielding are formed (helicoid frame). If the 42 side) is made of plastic, it is possible to make it more precise and highly rigid.

Also, the screw thread 42a for fitting the helicoid
By adopting a structure in which is a separate pin, it is possible to match the accuracy, and it is also possible to provide a lens frame that makes the best use of the advantages of the helicoid screw and is easy to manufacture. Furthermore, although the configuration of the present embodiment describes a helicoid screw, the mechanism can be applied to a helicoid-shaped lens frame in which a large number of cam grooves and cam pins are provided on the circumference.

(Appendix) According to the embodiment of the present invention as described in detail above, the following constitution can be obtained. That is, (1) the fixed guide member, the first moving member that is moved by being guided by the first guide means provided on the fixed guide member, and the first moving member that is held so as to be relatively movable with respect to the first moving member. Two
The driving member includes a moving member and a driving member that drives the first and second moving members by being moved by being guided by the second guiding means provided on the fixed guiding member. Is a first drive region in which at least the first and second moving members move without relatively moving, and these first and second moving regions
And a second drive region in which the moving member moves while relatively moving.

(2) In the above (1), the first moving member does not move in the second driving area of the driving member. (3) In the above (1) and (2), the movement of the first and second moving members in the first drive region of the drive member is a rectilinear motion.

(4) In the above item (2), the drive means includes the first and second moving members which engage with each other.
It is the second cam. (5) In the above (4), the first cam moves the first moving member in the first drive area and immobilizes the first moving member in the second drive area.

(6) In the above (4) and (5), the second cam moves the second moving member to the first moving area in the first drive area.
The moving member is moved substantially integrally with the moving member,
The moving member and the driving member are moved together. (7) In the above (1), the first and second moving members and the driving member are formed in an annular shape that coaxially fits with each other.

(8) In the above (1), the photographing optical system capable of changing the magnification and the photographing optical system are held, and the first moving member and the second moving member are guided by the first moving member.
It has a third moving member that is moved by relative movement of the moving member, and the movement of the third moving member in the first drive area is a collapsing operation and the movement in the second drive area is a zooming operation.

(9) In the above (1), further, the photographing optical system and the photographing optical system are held and guided by the first moving member, and the relative distance between the first moving member and the second moving member. A third movement member that is moved by movement, and retracts the movement of the third movement member in the first drive region;
The movement in the second drive area was set as the focusing operation.

(10) In the above (8) and (9), further, a lens frame side electric circuit board provided in the lens frame, a main body side electric circuit board provided in the image pickup apparatus main body, and both electric circuits. In addition to connecting the circuit board, it has a connecting member for disconnecting the two electric circuit boards when the photographing optical system is in the collapsed state.

(11) A photographing optical system including at least one lens group that can be moved back and forth between the photographing position and the storage position, a lens frame side electric circuit board provided in the lens frame, and an image pickup apparatus main body. A main body side electric circuit board provided and a connecting member for connecting both of these electric circuit boards and for disconnecting the both electric circuit boards when the photographing optical system is in the storage position. Characteristic lens barrel. (12) In the above (10) and (11), the connecting member has an elastic force that urges both electric circuit boards in a direction in which they are separated from each other.

(13) In the lens barrel in which the front surface of the photographing optical system is movable between a first position closest to the image pickup surface in the image pickup apparatus main body and a second position farthest from the image pickup surface, the image pickup is performed. It comprises at least one lens frame that is extended without rotating with respect to the apparatus main body, and at least three guide members that guide the lens frame straightly, and the at least three guide members are arranged in the radial direction. A lens barrel characterized by being arranged substantially the same.

(14) In the above (13), the second
The position is the retracted position. (15) In (13) above, the variable power operation is performed between the first position and the second position. (16) In (13), the collapsing operation and the zooming operation are performed between the first position and the second position.

(17) In (13) above, at least one lens frame that is extended without rotating is a lens frame that has the largest amount of extension. (18) In (13) above, a film is arranged on the imaging surface.

(19) In a frame member in which a multi-thread helicoid screw is provided between at least two frames which are fitted to each other, and which is relatively moved in the axial direction by relative rotation of the two, a plurality of screw threads of the multi-thread helicoid screw are provided. Among them, a frame member characterized in that only predetermined screw threads are fitted to each other and a predetermined amount of space is provided to the other screw threads.

(20) In a frame member in which at least two frames which are fitted to each other are connected by a plurality of cam means and are relatively moved in the axial direction by the relative rotation of the two, a predetermined one of the plurality of cam means is provided. A frame member, characterized in that only the cam means are fitted, and a predetermined amount of space is provided on the other cam means.

(21) In (19) and (20) above, the at least two frames are lens frames in the lens barrel. (22) In above (19) and (20), at least one of the at least two frames holds at least a part of an optical element that constitutes an optical system in the lens barrel.

(23) The fixed frame, the first moving frame which is moved by being guided by the first guide means provided on the fixed frame, and the second moving frame which is held so as to be relatively movable with respect to the first moving frame. The drive frame includes a moving frame and a drive frame that drives the first and second moving members by being moved by being guided by the second guide means provided on the fixed frame. , At least a first drive region in which the first and second moving frames move integrally in the optical axis direction without relatively moving, and these first and second moving frames move in the optical axis direction while relatively moving A lens barrel having a second drive region.

(24) In (23), the lens barrel is retracted or the photographing preparation operation is performed by integrally advancing and retracting the first and second moving frames in the first drive area of the drive frame. First and second in the second drive area
The relative movement of the moving frame causes the optical element in the lens barrel to perform a variable magnification operation.

(25) In the above (23), the lens barrel is retracted or the photographing preparation operation is performed by integrally advancing and retracting the first and second moving frames in the first drive area of the drive frame. First and second in the second drive area
The relative movement of the moving frame causes the optical element in the lens barrel to perform a focusing operation.

(26) In the above (24) and (25), cam means are provided on the first and second moving frames, and the optical element is operated by the action of the cam means.

(27) Fixed frame, straight groove formed in the fixed frame so as to extend in the optical axis direction, and first drive pin arranged on the inner peripheral side of the fixed frame and fitted in the straight groove. A first moving frame provided with, and on the inner peripheral side of the first moving frame,
A second moving frame, which is held so as to be rotatable relative to the optical axis, and provided with a second drive pin into which a straight groove of the fixed frame is fitted, and a driving force of a driving source, with respect to the fixed frame. The drive frame that is rotated, the first drive groove that is provided in the drive frame, and into which the pin of the first moving frame fits through the straight groove of the fixed frame, and the first drive groove that is continuous with one end of the straight groove of the fixed frame. A first circumferential groove provided so as to extend in a direction perpendicular to the optical axis and a straight groove formed in the drive frame, and into which the pin of the second moving frame is fitted through the straight groove of the fixed frame. 2 drive grooves and this second
A second circumferential groove continuously extending from one end of the drive groove in a direction perpendicular to the optical axis,
By inserting the first and second drive pins into the first drive groove and the second drive groove, respectively, in the rotating region of the drive frame, the first moving frame and the second moving frame are moved to the optical axis. A first drive region that is moved back and forth in the optical axis direction without relatively rotating around;
The first and second drive pins reach the ends of the first and second drives, respectively, and then are fitted into the first and second circumferential grooves, so that the first moving frame and the second moving frame are exposed to light. A moving device having a second drive region which is relatively rotated about an axis.

(28) In (27), the lens barrel is retracted or the photographing preparation operation is performed by integrally moving the first and second moving frames in the first drive region of the drive frame back and forth. The relative rotation of the first and second moving frames in the second drive area causes the optical element in the lens barrel to perform a variable power operation.

(29) In (27) above, the lens barrel retracting operation or the photographing preparation operation is performed by integrally advancing and retracting the first and second moving frames in the first drive area of the drive frame. The optical element in the lens barrel is focused by the relative rotation of the first and second moving frames in the second drive area.

(30) In the above (28) and (29), one of the first and second moving frames is provided with a straight groove and the other is provided with an inclined groove, and the optical element is provided in these grooves. It has pins that fit together.

(31) In (27) above, by integrally advancing and retracting the first and second moving frames in the first driving area of the driving frame, the first and second moving frames and the lens barrel are moved. The other lens frame is moved back and forth integrally, and the relative rotation of the first and second moving frames in the second drive region causes the other lens frame to move along the optical axis with respect to the first and second moving frames. Move back and forth in the direction.

(32) In (31), one of the first and second moving frames is provided with a straight groove and the other is provided with an inclined groove, and the other lens frame is simultaneously provided in these grooves. It has a mating pin. (33) In the above (31), the other lens frame holds an optical element forming at least a part of the optical system in the lens barrel.

(34) In (33), the optical element is a variable power lens. (35) In (33), the optical element is a focusing lens.

[0100]

As described above, the first aspect of the present invention is as described above.
According to the moving device of (1), it is possible to provide a compact moving device that can be stored compactly and does not become inoperable by being pulled into the storage side by an external force, and has a simple configuration.

[Brief description of the drawings]

FIG. 1 is an exploded view of a main part of a mechanism for explaining an outline of a moving device according to a first embodiment of the present invention.

FIG. 2 is a half cross-sectional view of a camera including a lens barrel to which the moving device according to the first embodiment of the present invention is applied, in a collapsed state.

FIG. 3 is a half sectional view of a camera including the lens barrel of FIG. 2 in a wide state.

FIG. 4 is a half cross-sectional view of a camera including the lens barrel of FIG. 2 in a telephoto state.

5A and 5B are development views of a moving frame and a cam frame of the lens barrel frame of FIG. 2, where FIG. 5A is a development view in a collapsed state or a wide state, and FIG. 5B is a development view in a tele state. Show.

6A and 6B are development views of a fixed frame and a drive frame of the lens barrel frame of FIG. 2, wherein FIG. 6A is a development view in a collapsed state, FIG. 6B is a development view in a wide state, and FIG. The development view in a state is shown.

FIG. 7 is a half cross-sectional view of a camera incorporating a lens barrel to which the moving device according to the second embodiment of the present invention is applied, in a collapsed state.

8 is a half cross-sectional view of a camera having the lens barrel of FIG. 7 built-in in a wide state.

9 is a half sectional view of a camera including the lens barrel of FIG. 7 in a telephoto state.

FIG. 10 is a half cross-sectional view of a camera including a lens barrel to which the moving device according to the third embodiment of the present invention is applied, in a collapsed state.

11 is a half cross-sectional view of a camera including the lens barrel of FIG. 10 in a telephoto state.

FIG. 12 is a cross-sectional view in the optical axis direction around the linear guide portion of the lens barrel frame portion of FIG.

13 is a development view of a drive frame of the lens barrel frame of FIG.

14 is a development view of a cam frame A of the lens mirror frame in FIG.

FIG. 15 is a development view of the lens barrel of FIG. 10 around the linear guide portion.

FIG. 16 is a sectional view of a helicoid screw part of a lens barrel to which the moving device according to the fourth embodiment of the present invention is applied.

[Explanation of symbols]

 5: Moving frame (first moving member) 6: Cam frame (second moving member) 7: Fixed frame (fixed guide member) 7a: Straight guide groove (first guide means) 7c: Stop ring ( Second guide means) 8, 31 ... Drive frame (driving member) 29 ... Cam frame A (second moving member) 30 ... Guide frame A (first moving member) 34 ... Press plate (second guide means) ) 51 ... fixed guide member 51a ...... guide groove (first guide means) 51b ...... guide groove (second guide means) 52 ...... first moving member 53 ...... second moving member 54 ...... drive member SA ... … First drive area SB …… Second drive area

Claims (1)

[Claims] 1. A fixed guide member, a first moving member which is moved by being guided by a first guide means provided on the fixed guide member, and a first moving member which is held so as to be movable relative to the first moving member. 2 moving members, and a driving member that drives the first and second moving members by being moved by being guided by second guiding means provided on the fixed guiding member. And at least a first drive region in which the first and second moving members move without relative movement, and a second drive region in which the first and second moving members move while moving relative to each other. A moving device characterized by.