JPH09251178A - Optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent unnaturalness and the sense of incongruity from being given to a user viewing a finder by providing a device with a linkage means actuating the finder by linking it with the moving action of an image forming optical system and cutting the linkage of the finder with respect to the moving action of the image forming optical system in a different direction from the moving action thereof after it is moved. SOLUTION: The linkage means for allowing a finder optical system to execute a variable power action according to the variable power action of a photographing optical system is constituted of a first lever 5 and a second lever 7. A non-linkage means is constituted of a pin 5b projectingly formed on the lever 5 and a rectangular hole 7a formed on the lever 7. Then, when the variable power action of the optical system is started to be executed toward a wide position, the pin 5b is moved to the back end position from the front end position of the hole 7a. Since the lever 7 is not driven by the pin 5b in an extremely short term until the pin 5b abuts on the back edge of the hole 7a, the variable power lens holding frame 9 of the finder optical system is not moved and the variable power action of the finder optical system is not executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device such as a camera, and more specifically, to an image forming optical system capable of a variable power operation and a focus adjusting operation, and a variable optical system according to a variable power state of the image optical system. The present invention relates to an optical device such as a camera including a finder that displays a double image.

[0002]

2. Description of the Related Art A lens shutter camera in which a finder optical system and a photographing optical system are separately configured is recently equipped with a zoom lens barrel. This type of camera is generally called a zoom camera, and is configured to change the magnification of the finder optical system in conjunction with the changing operation of the photographing optical system.

By the way, in general, a lens shutter camera is required to be small and lightweight and to be manufactured at a low cost. Therefore, the following proposals have been conventionally made to achieve the design target. ing.

(A) Japanese Patent Application Laid-Open No. 5-173223 In which a finder optical system is moved by a lever that follows a zooming operation of a lens barrel of a photographing optical system.

(B) Japanese Unexamined Patent Publication No. 2-24613 A device for performing focusing and zooming with one motor.

(C) Japanese Unexamined Patent Publication No. 64-84233. One motor performs focusing and zooming via a helical bar.

(D) Japanese Unexamined Patent Publication No. 61-259237 SUMMARY OF THE INVENTION One cam having a zigzag shape or a zigzag shape is formed by connecting a plurality of focusing cam grooves and zooming cam grooves having different directions at one end. A cam plate having a groove formed therein, and the cam plate causes the photographing optical system to alternately perform focusing and zooming.

(E) In addition to the above proposal, the above-mentioned Japanese Patent Laid-Open No.
A cam plate similar to the one disclosed in Japanese Laid-Open Patent Publication No. 1-259237 causes a finder optical system to interlock with a photographing optical system that alternately performs a focusing operation and a zooming operation, and the action of the cam causes the photographing optical system to focus. A camera having a structure in which the finder optical system is stopped when operating, and the finder optical system also performs a scaling operation in conjunction with the imaging optical system when the imaging optical system performs a scaling operation has been commercialized.

[0009]

In the above-mentioned camera (e), for example, when the photographing optical system is moved from the telephoto end to the wide end, the cam follower of the photographing optical system divides the zooming area and the focus adjusting area of the cam. The size of the viewfinder image changes continuously in the zoom area of the cam because it moves alternately, but the size of the viewfinder image does not change in the focus adjustment area of the cam, so the viewfinder image changes in size intermittently. However, as a result, there is a drawback in that the camera user looking into the viewfinder feels unnatural and uncomfortable.

A first object of the present invention is to provide an optical device which does not give an unnatural feeling or discomfort to a user looking through a finder.

A second object of the present invention is to perform a zooming operation of the imaging optical system without changing the zooming operation of the finder in the focus adjusting operation according to the distance of the object of the imaging optical system. It is an object of the present invention to provide an optical device in which the viewfinder is operated to change the magnification during the focus adjustment operation so that the user looking into the viewfinder does not feel unnatural or uncomfortable.

A third object of the present invention is to perform a zooming operation of the imaging optical system without changing the zooming operation of the finder in the focus adjusting operation according to the distance of the object of the imaging optical system. In focus adjustment operation, the viewfinder continuously changes its magnification in response to the magnification change operation of the imaging optical system and the focus adjustment operation, and provides an optical device that does not give an unnatural feeling to the user looking into the viewfinder. It tries to be able to do it.

A fourth object of the present invention is to alternately provide a magnification changing guide area and a focus adjusting guide area, and to provide an image forming optical unit along the magnification changing guide area and the focus adjusting guide area. In an optical device that causes the image forming optical unit to perform a zooming operation and a focus adjusting operation by guiding, the image forming optical unit is guided to the focus adjusting guide for a focus adjusting operation according to a distance of an object. When the imaging optical unit is guided by the focus adjustment guide for changing the magnification without changing the magnification of the viewfinder when changing the magnification, the magnification change operation of the viewfinder is performed and the user looking into the viewfinder It is intended to provide an optical device that does not give an unnatural feeling or strangeness.

A fifth object of the present invention is to provide an optical device which is simple and inexpensive to construct the device for achieving the above first to fourth objects.

[0015]

In order to achieve the above object, the present invention provides an optical device having the construction shown in each of the claims.

That is, for example, the finder is operated in association with the movement of the imaging optical system, and the linkage of the finder is cut off after the movement of the imaging optical system in a direction different from the movement. An optical device having means.

Further, the image forming optical unit is alternately provided with a variable power guide region and a focus adjusting guide region, and the image forming optical unit is guided along the variable power guide region and the focus adjusting guide region to form the image. A guide means for causing an optical unit to perform a zooming operation and a focus adjusting operation, and linked with that the imaging optical unit is guided in one direction along a zooming guide area and a focus adjusting guide area of the guide means. And the finder is operated to guide the imaging optical unit in one direction along the magnification changing guide area and the focus adjusting guide area of the guide means, and then the focus adjusting guide area of the guide means. The optical device has a linking unit that breaks the linking of the finder with respect to being guided in a direction different from the one direction.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. It should be noted that although the optical device of the embodiments described below is a zoom camera, the optical device to which the present invention can be applied is not limited to the zoom camera.

<First Embodiment> FIG. 1 shows a first embodiment of the present invention. In the figure, 2 is a first group lens holding cylinder that holds the first group lens of the photographing optical system of the camera and is movable only in the optical axis direction, and 3 is an optical axis that holds the second group lens of the camera 2 group lens holding cylinder that can move only in one direction, 4
Is a lens barrel that moves integrally with the second lens group holding barrel 3, 1 is a cam plate that is formed with cam grooves 1A and 1B and is moved in the direction of arrow f or g by a mechanism (not shown), and 2a is a first lens group holder The follower pin 3a, which is fixed to the barrel 2 and is slidably inserted into the cam groove 1B, is fixed to the second group lens holding barrel 3 and is relatively slidably inserted into the cam groove 1A. The follower pins 4a are protrudingly provided on the lens barrel 4, and the interlocking pins 5 engaged with the lever 5 of the finder linking means, which will be described later, are fixed to the fixing pin 6 (a structural member not shown) at the hole 5a at one end. A first lever 7 fitted to a projecting pin) and rotatable about the pin 6; a lever 7 fitted to the pin 6 rotatably in a hole 7b A rotatable second lever, 8 is the second lever -A spring clamping member that applies a braking force to the lever 7 by lightly sandwiching the upper and lower surfaces of the lever 7 to suppress unnecessary movement, 9 is a lens holding frame for zooming of the finder optical system, and 9a is for zooming. A follower pin 10 projecting from the lens holding frame 9 and inserted into the third cam groove 7c of the second lever 7 is a spring for pressing the tip end of the first lever 5 against the pin 4a of the lens barrel 4, and 11 is a spring. The objective lens of the finder optical system, 12 is a prism for image inversion, and 13 is the eyepiece lens of the finder optical system. The cam groove 1A formed in the cam plate 1 is for positioning the second group lens holding cylinder 3 in the optical axis direction, and as shown in the drawing, the moving direction of the cam plate 1 (perpendicular to the optical axis of the camera) It is a straight groove extending obliquely with respect to the On the other hand, the cam groove 1B for positioning the first group lens holding barrel 2 in the optical axis direction has a short linear groove portion 1b oriented in the first direction (direction parallel to the cam groove 1A) as shown in the drawing. The short linear grooves 1c oriented in the direction (right-angle direction to the optical axis) are alternately arranged in series to form a "folded shape", and the grooves 1b are used for focusing the photographing optical system. Is a focus control cam, and the groove portion 1c is a zoom control cam for varying the magnification of the photographing optical system.

The position 1d at one end of the groove 1b is a follower pin 2a of the first group lens holding cylinder 2 in each groove 1b.
Is a focus adjustment standby position (focus adjustment operation start position).

In the above structure, when the cam plate 1 is moved in the direction of the arrow f when the follower pin 2a of the first lens group holding barrel 2 is located in the groove 1b, the first lens group holding barrel 2 and the second lens group holding barrel are moved. 3 is moved forward by the same amount in the direction of the optical axis, and a so-called all-group extending type focusing operation is performed.

On the other hand, when the cam plate 1 is moved in the direction of the arrow f when the follower pin 2a is located in the groove 1c of the cam plate 1, the first group lens holding barrel 2 does not move in the optical axis direction, and 2 Since only the group lens holding barrel 3 changes the position in the optical axis direction, the distance between the first group lens and the second group lens changes, so that the photographing optical system is zoomed.

The first lever 5 and the second lever 7 constitute a linkage means for varying the magnification of the finder optical system according to the magnification change operation of the photographing optical system. The linkage means is the first lever 5. It also has the following non-coupling means for preventing the second lever 7 and the second lever 7 from interlocking with each other.

In this embodiment, the non-coupling means is a pin 5b protruding from the first lever 5 and a rectangular square hole (or rectangular recess) 7a formed in the second lever 7.
And the length of the long side of the square hole 7a is determined so as to cause the following movement between the first lever 5 and the second lever 7.

FIG. 2 is a view for explaining the relative positional relationship between the pin 5b of the first lever 5 and the square hole 7a of the second lever 7 when the photographing optical system performs the zooming operation and the focus adjusting operation. .

In the configuration of the present embodiment, when the photographing optical system is made to perform the focusing operation, the photographing optical system always moves from the focus adjustment standby position 1d corresponding to each magnification in the retracting direction (downward direction in FIG. 2). Is done by doing.

In the diagram (a) shown on the left side of FIG. 2, the thick arrow indicates the focusing operation of the photographing optical system, and the thin arrow indicates the photographing optical system on the short focal length side (wide side).
This shows the movement of the pin 5b when the variable magnification is moved to.

When the magnification of the photographing optical system is changed to the wide side, the cam plate 1 of FIG. 1 moves in the direction of the arrow (that is, the direction in which the photographing optical system is retracted), and the follower pin 2a is attached to the first lens group holding barrel 2. It moves rearward along the optical axis in the section of the cam groove 1b and does not move in the section of the cam groove 1c perpendicular to the optical axis.

On the other hand, since the follower pin 3a of the second lens group holding barrel 3 is in the cam groove 1A, the follower pin 3a always moves in the lens retracting direction (that is, rearward.
Since the lens barrel 4 integrated with the second group lens holding barrel 3 also moves in the lens retracting direction, the pin 4a and the pin 5b of the lever 5 also continuously move rearward.

In FIG. 2A, when the zooming operation of the photographing optical system is started toward the wide position, the pin 5b moves from the front end position to the rear end position of the elongated hole 7a, and the pin 5b. Since the second lever 7 is not driven by the pin 5b for a very short period until the contact with the rear edge of the elongated hole 7a, the variable lens holding frame 9 of the finder optical system does not move, and accordingly, the finder optical system does not move. No scaling operation occurs.

After the pin 5b comes into contact with the rear end edge of the long hole 7a and further pushes the rear end edge of the long hole 7a to move rearward to the position corresponding to the wide position, the pin 5b moves to the long hole 7a.
The rear end edge of a is continuously pushed rearward, and the second lever 7 is rotated counterclockwise in FIG. 1 about the hole 7b by an angle corresponding to the amount of the pushing. The variable-magnification lens holding frame 9 of the finder optical system is moved in the optical axis direction, and the image magnification of the finder continuously changes to the wide side according to the change in magnification of the photographing optical system. After that, when the follower pin 2a of the first group lens holding cylinder 2 reaches the wide position of the cam groove 1c and further moves to near the end position of the cam groove 1c for focus adjustment, the moving direction of the cam plate 1 is reversed and the second group lens holding is carried out. The barrel 3 and the lens barrel 4 are extended to the tele side. At that time, since the second lever 7 is pinched by the spring pinching member 8 and a light braking force is applied, it does not move, so that the pin 5b moves away from the rear end edge of the square hole 7a and the front end of the hole 7a. Move to the vicinity. Then, when the pin 5b moves to near the front edge of the square hole 7a, the follower pin 2a reaches the focus adjustment standby position 1d of the groove portion 1b of the cam plate 1, and at the same time, the movement of the cam plate 1 is stopped, which causes the wide state. The magnification setting operation to is completed.

After that, in the focusing operation in this wide state, the cam plate 1 moves again in the direction of the thick arrow in FIG. 2, but in this case, the pin 5b has the elongated hole 7a.
The pin 5b moves to the rear side within the range inside the
Since the rear edge of a is not pushed, the second lever 7 is not rotated even if the first lever 5 is rotated. Therefore,
No zooming operation of the finder occurs during focusing operation.

FIG. 2B shows the movement of the pin 5b when the photographing optical system is moved to the middle position (medium focal length) and zooming.

When the photographing optical system is moved from the wide side to the middle position (medium focal length), the pin 5b pushes the front end edge of the square hole 7a to rotate the second lever 7 as indicated by a thin straight arrow. Thus, the image magnification of the finder is continuously changed, and the follower pin 2a moves to the focus adjustment standby position 1d of the groove 1b of the cam plate 1 and stops there.

Thereafter, during the focusing operation in this middle position, the second lever 7 is moved only by moving the pin 5b rearward within the range of the elongated hole 7a, as in the wide-angle focusing operation described above. Therefore, the viewfinder scaling operation is not performed.

When the photographing optical system is moved from the telephoto side to the middle position, the pin 5b pushes the rear end edge of the elongated hole 7a to rotate the lever 7 as in the case of moving to the wide position described above. After continuously changing the image magnification of the viewfinder by, the focus returns to the tele side and reaches the focus adjustment standby position of the middle position. Also in this case, similarly to the above, when the moving direction of the pin 5b is reversed, the lever 7 does not follow the forward movement of the pin 5b because the lever 7 is given a light braking force by the spring clamping member 8. Then, the same focusing operation as described above is performed thereafter, but at that time, the finder does not change.

FIG. 2C on the right side of FIG. 2 shows the pin 5 when the photographic optical system is moved to the tele position (long focal length) by variable magnification.
It represents the movement of b.

Since the lens is always moved from the wide side when the lens is moved to the tele position, the pin 5b pushes the front end edge of the slot 7a from the position shown in the figure to move to the front side, so that the image magnification of the finder is continuously changed. When the photographing optical system changes to the tele position, the follower pin 2a stops at the focus adjustment standby position 1d of the groove 1b of the cam plate 1. After that, during the focusing operation in this telescopic state, the pin 5b only moves backward within the range of the inside of the elongated hole 7a of the lever 7 and the lever 7 does not move, so that the viewfinder remains stopped.

As described above, in the configuration of the present embodiment, the viewfinder continuously changes the magnification when the taking optical system is operated to change the magnification, and the finder operates when the taking optical system performs the focus adjustment operation. Since it does not, there is no fear of giving a feeling of strangeness or unnaturalness to the camera user who is gazing at the viewfinder.

In the present embodiment, the focusing operation has been described as the moving direction of the lens barrel. However, it goes without saying that the focusing operation may be the moving direction of the lens barrel. The directions of movement in are all opposite.

FIG. 3 is a schematic diagram showing a part of the configuration of the control system of the camera of this embodiment.

In the figure, 100 is a microcomputer as a control means of the camera, 101
Is a motor for driving the cam plate 1, 102 is a motor drive circuit for driving the motor 101, 103 is a known distance measuring circuit (including a distance measuring sensor) mounted on the camera, and 104 is a cam. A position detector for detecting the moving position of the plate 1, 105 is a known zoom switch provided in the camera, 106 is a known release switch turned on by a shutter release member provided in the camera, and 106 is A known photographing circuit (including a photometric sensor, a shutter, etc.) for performing a photographing operation.

FIG. 4 is a flowchart of the control operation executed by the microcomputer 100, and the function and control operation of the camera will be described below with reference to FIGS. 3 and 4.

(Step # 1) It is detected whether or not the zoom switch 105 is on, and if it is on, step # 2
If not ON, repeat step # 1.

(Step # 2) It is detected whether or not the zoom switch 105 is operated to the tele side, and if it is operated to the tele side, the process proceeds to step # 3, and if it is not operated to the tele side, it is switched to the wide side. Since it is being operated, the process proceeds to step # 18.

(Step # 3) The position detector 104 causes the cam plate 1 to be in the teleposition focus adjustment standby position 1d.
If it is in the teleposition focus adjustment standby position 1d, the process proceeds to step # 9, and if not, the process proceeds to step # 4.

(Step # 4) The motor 101 is rotated in the normal direction via the motor drive circuit 102 (the cam plate 1 is moved in the direction of arrow f in FIG. 1) to move the photographing optical system in the feeding direction.

(Step # 5) It is detected whether or not the zoom switch 105 is off, and if it is off, the process proceeds to step # 6, and if it is not off, the process proceeds to step # 7.

(Step # 6) When the position detector 104 detects that the follower pin 2a of the first group lens holding barrel 2 has reached the focus adjustment standby position 1d of the cam groove 1b of the cam plate 1, the process proceeds to step # 8.

(Step # 7) It is judged by the position detector 104 whether or not the cam plate 1 has reached the teleposition focus adjustment standby position. If it is judged that the cam plate 1 has reached the teleposition focus adjustment standby position. The process proceeds to step # 8, and if the position is not reached, the process returns to step # 5.

(Step # 8) The motor 101 is stopped and the process proceeds to step # 9.

(Step # 9) Release switch 106
It is detected whether or not is turned on, and if it is turned on, the process proceeds to step # 10.

(Step # 10) The distance measuring circuit 103 is caused to perform distance measurement.

(Step # 11) Motor drive circuit 102
Thus, the motor 101 is rotated in the reverse direction, and the cam plate 1 is moved in the arrow g direction (the direction in which the photographing optical system is retracted).

(Step # 12) If it is determined from the output of the position detector 104 that the cam plate 1 has reached the position corresponding to the output of the distance measuring circuit 103, the process proceeds to step # 13.

(Step # 13) The motor 101 is stopped and the process proceeds to step # 19.

(Step # 14) The photographing operation is performed by the photographing circuit 105, and when the photographing operation is completed, the step # 1
Go to 5.

(Step # 15) Motor drive circuit 102
The motor 101 is rotated in the forward direction via the arrow to return the cam plate 1 in the direction of arrow f.

(Step # 16) When the position detector 104 detects that the cam plate 1 has reached the focus adjustment standby position before moving in step # 11, the process proceeds to step # 17.

(Step # 17) The motor 101 is stopped and the process returns to step # 1.

(Step # 18) It is judged by the position detector 104 whether or not the cam plate 1 is already in the wide position focus adjustment standby position 1d. If it is in the wide position focus adjustment standby position 1d, the process proceeds to step # 9. If not, proceed to step # 19.

(Step # 19) Motor drive circuit 102
By rotating the motor 101 in the reverse direction (moving the cam plate 1 in the direction of arrow g in FIG. 1) via the, the photographing optical system is moved in the retracting direction.

(Step # 20) Zoom switch 105
Is turned off. If it is turned off, proceed to step # 21. If not turned off, step # 2
Go to 5.

(Step # 21) The focus adjustment standby position 1d of the cam groove 1b of the cam plate 1 is controlled by the output of the position detector 104.
The follower pin 2a of the first group lens holding cylinder 2 reaches
If it is detected that the focus adjustment has moved further, step # 2
Proceed to 3.

(Step # 22) It is judged by the position detector 104 whether or not the cam plate 1 has reached the focus adjustment standby position of the wide position and further moved by the focus adjustment, and it is judged that it has moved by the focus adjustment. If so, go to step # 23,
If it has not moved, the process returns to step # 20.

(Step # 23) The motor 101 is normally rotated to move the cam plate 1 in the direction of arrow f (the direction in which the photographing optical system is extended).

(Step # 24) The focus adjustment standby position 1d of the cam groove 1b of the cam plate 1 is controlled by the output of the position detector 104.
When it is detected that the follower pin 2a of the first group lens holding barrel 2 has arrived at, the process proceeds to step # 25.

(Step # 25) The motor 101 is stopped and the process returns to step # 9.

Thereafter, similarly to the above, the operation proceeds to steps # 9 to # 17.

By the above operation, the pin 5b of the first lever 5
Moves as shown in FIG.

<Second Embodiment> FIG. 3 shows the configuration of a second embodiment of the present invention. This embodiment is different from the first embodiment in that a gear mechanism is used instead of a lever as a linking means between the photographing optical system and the finder. Below, the same components as those in the first embodiment are designated by the same reference numerals, and only the configurations different from those in the first embodiment will be described.

A rack 24a extending parallel to the optical axis is fixed to a lens barrel 24 which moves integrally with the first group lens holding barrel 2, and a gear 25 meshing with the rack 24a is fixed to a structural member (not shown). It is supported so that it can only rotate at the position. A pin 25a parallel to the axis of the gear 25 is provided in the vicinity of the outer peripheral edge of one side of the gear 25 so as to be adjacent to the gear 25 and separated from the gear 25 on a coaxial line.
6 is formed with an arcuate groove 26a into which the pin 25a is inserted. The length of the groove 26a in the circumferential direction is the same as the length of the long side of the square hole 7a of the lever 7 of the first embodiment, and is set to a predetermined length so that the movement of the photographing optical system in the optical axis direction is not transmitted to the finder. Has become.

The gear 27 that meshes with the gear 26 is fixed to the same shaft 30 as one bevel gear 29 of the direction changing mechanism 28, and the other bevel gear 31 of the direction changing mechanism 28 has the same shaft as the drive gear 33 of the cam plate 34. It is fixed at 32. The drive gear 33 meshes with a rack 34b formed on a cam plate 34, and when the gear 33 is rotated, the cam plate 34 is moved in the direction perpendicular to the optical axis. The cam plate 334 is provided with a cam groove 34a for controlling the position of the zoom lens holding frame 9 of the finder.
A follower pin 9a of a variable magnification lens holding frame 9 of a finder is inserted in 4a so as to be relatively slidable. Cam plate 34
Is moved only when driven from the gear 33,
A leaf spring-shaped friction member 35 is pressed against the plate.

Also in the present embodiment, the function of the linking means between the taking optical system and the viewfinder is the same as that of the first embodiment. That is, when the first-group lens holding cylinder 2 and the second-group lens holding cylinder 3 are moved by focusing by the cam grooves 1A and 1B of the cam plate 1, the rotation of the gear 25 rotates the gear 2.
Not transmitted to 6. Further, when the first group lens holding barrel 2 and the second group lens holding barrel 3 move to, for example, a wide position, the operation described with reference to FIG.
The viewfinder display image changes continuously.

Of course, the linking means having a function such as the combination of the pin 25a and the groove 26a may be formed as an independent member.

(Correspondence between Invention and Embodiment) In the above embodiments, the first lever 5, the fixing pin 6, the second lever 7, the gears 25, 26, 27, 33, the direction changer 28,
The bevel gears 29, 31, the lever 30, and the cam plate 34 are the linking means of the present invention, and the cam plate 1, the first group lens holding barrel 2, the second group lens holding barrel 3, and the lens barrels 4, 24 are the image forming means of the present invention. In the optical system or the photographing optical system, the variable magnification lens holding frame 9, the viewfinder objective lens 11, the prism 12, and the viewfinder eyepiece lens 13 are the viewfinder of the present invention, and the square holes 7a and the grooves 26a are the space forming portion of the present invention. The spring clamping member 8 and the friction member 35 are the holding means of the present invention, the microcomputer 100, the motor 101, the motor drive circuit 102 are the driving means of the present invention, the motor 101 is the electric motor of the present invention, and the microcomputer 100 is the present invention. The position detector 104 serves as the position determining means of the present invention, the cam plate 1 serves as the guiding means of the present invention, and the first group lens holding barrel 2 or the second group lens holding barrel 3 serves as the imaging optical system of the present invention. Corresponds to each unit

The above is the correspondence relationship between each configuration of the embodiments and each configuration of the present invention, but the present invention is not limited to the configurations of these embodiments, and the functions or implementations shown in the claims It goes without saying that any structure may be used as long as the function of the structure of FIG.

For example, in the above embodiment, the focus adjustment operation is always started from the focus adjustment standby position, but it may be started from a position on the way.
Further, it is needless to say that the present invention can be applied to any type of zooming and focus adjusting operations of the photographing optical system, not limited to the cam configurations shown in the above embodiments.

Further, the present invention may be such that the whole or part of the configuration of the claims or the embodiments forms one device or is combined with another device. It may be like an element constituting the device.

The present invention is applicable to various forms of cameras such as single-lens reflex cameras, lens shutter cameras, video cameras, etc.
Further, the invention can be applied to optical devices and other devices other than cameras, devices applied to those cameras and optical devices and other devices, or elements constituting these devices.

[0081]

As described above, according to the present invention, it is possible to provide an optical device which does not give an unnatural feeling to the user looking through the finder.

Further, according to the present invention, in the focus adjusting operation according to the distance of the object of the image forming optical system, the focus is not changed during the magnification changing operation of the image forming optical system without moving the viewfinder. It is possible to provide an optical device that does not give an unnatural feeling or discomfort to a user looking into the finder by performing a magnification change operation during the adjusting operation.

Further, according to the present invention, in the focus adjusting operation according to the distance of the object of the image forming optical system, the focus is not changed during the changing operation of the finder, and the focus is adjusted during the changing operation of the image forming optical system. In the adjustment operation, the finder is continuously varied in accordance with the magnification changing operation of the imaging optical system and the focus adjusting operation, and an optical device which does not give an unnatural feeling to the user looking into the finder can be provided. It is a thing.

Further, according to the present invention, the variable magnification guide areas and the focus adjustment guide areas are alternately provided, and the imaging optical unit is guided along the variable magnification guide areas and the focus adjustment guide areas. In the optical device that causes the image forming optical unit to perform the zooming operation and the focus adjusting operation, the image forming optical unit is guided to the focus adjusting guide for the focus adjusting operation according to the distance of the object. When the imaging optical unit is guided by the focus adjustment guide to change the magnification, the viewfinder is operated to change the magnification, so that a user looking into the viewfinder cannot see it. It is possible to provide an optical device that does not give a feeling of naturalness or discomfort.

Further, according to the present invention, the above device can be constructed simply and at low cost.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of part of a mechanical structure of an optical device according to a first embodiment of the present invention.

2 is a diagram for explaining a relative positional relationship between a pin 5b of a lever 5 and a hole 7a of a second lever 7 which are interlocked with an imaging optical system (imaging optical system) of the optical device of FIG. a) shows a case where the imaging optical system moves to a wide position,
(B) shows the case of moving to the middle position,
(C) shows the case of moving to the tele position.

FIG. 3 is a schematic diagram showing the configuration of part of an electrical control system of the optical device of FIG.

FIG. 4 is a flowchart of the microcomputer 100 shown in FIG.

FIG. 5 is an exploded perspective view of a part of a mechanical structure of an optical device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Cam Plate 2 1st Group Lens Holding Cylinder 3 2nd Group Lens Holding Cylinder 4, 24 Lens Barrel 5 First Lever 6 Fixing Pin 7 Second Lever 7a Square Hole 8 Spring Clamping Member 9 Variable Lens Holding Frame 1A, 1B, 7c Cam groove 1b Focus adjustment groove 1c Variable magnification groove 2a, 3a, 9a Follower pin 11 Finder objective lens 12 Prism 13 Finder eyepiece 24a Rack 25, 26, 27, 33 Gear 26a Groove 28 Direction changing mechanism 29, 31 Bevel gear 30 shaft 34 cam plate 34a cam groove 34b rack 35 friction member 100 microcomputer 101 motor 102 motor drive circuit 104 position detector

Claims (42)

[Claims] 1. Linking means for operating the finder in association with the movement of the imaging optical system, and for disconnecting the finder from the movement of the imaging optical system in a direction different from the movement after the movement. An optical device having. 2. The optical device according to claim 1, wherein the optical device is a camera. 3. The optical device according to claim 1, wherein the imaging optical system is a photographing optical system. 4. The optical device has the image-forming optical system, and the image-forming optical system performs a focus adjusting operation when the image-forming optical system moves in a state in which the connection with the finder is cut off. The optical device according to any one of claims 1 to 3. 5. The optical device has the image forming optical system, and the image forming optical system performs a zooming operation when the image forming optical system moves in a state of being linked with the finder. The optical device according to claim 1. 6. The optical device has the image forming optical system, and the image forming optical system performs a focus adjusting operation and a magnification changing operation when the image forming optical system moves in a state of being linked with the finder. The optical device according to any one of claims 1 to 5. 7. The optical device includes the image forming optical system, and the image forming optical system moves in a state in which the image forming optical system is linked with the finder, and a first magnification changing operation and a focus adjusting operation are performed. The optical device according to any one of claims 1 to 3, wherein the second variable magnification operation is sequentially performed. 8. The optical device according to claim 1, wherein the linking unit has a space forming portion for breaking the link with the finder. 9. The optical device has the finder, and the finder changes a magnification when operating in cooperation with the imaging optical system.
The optical device according to any one of 1. 10. The optical device includes the finder, and the finder continuously changes the magnification when operating in cooperation with the imaging optical system. 9. The optical device according to any one of 8. 11. The holding means for holding the finder so as not to operate while the finder is disconnected from the image forming optical system, according to any one of claims 1 to 10. The optical device described. 12. The optical device according to claim 11, wherein the holding unit applies friction so that the finder does not move. 13. The linking means moves the imaging optical system by a predetermined section in a direction in which the imaging optical system is disconnected from the viewfinder, and then the imaging optical system further moves in the same direction, thereby causing the imaging optical system to move. 13. The optical device according to claim 1, wherein the finder is associated with movement. 14. A drive unit for moving the image forming optical system in a first direction in association with the finder and then moving the image forming optical system in a second direction to disconnect from the finder. The optical device according to claim 1, further comprising: 15. The optical device according to claim 14, wherein the drive unit includes an electric motor. 16. The optical device has a position determining means for determining a moving position of the image forming optical system, and the driving means according to the determination result of the position determining means. The optical device according to claim 14, further comprising a control unit for controlling movement. 17. The image forming optical system is moved in the first direction by linking the viewfinder, and then the image forming optical system is moved in the second direction to disconnect the link with the viewfinder. 14. The optical device according to claim 1, further comprising a driving unit that moves the image forming optical system in the first direction in a state where the image forming optical system is disconnected from the finder. 18. The imaging optical system is moved in the first direction by linking the viewfinder, and then the imaging optical system is moved in the second direction to disconnect the link with the viewfinder. 14. The optical device according to claim 1, further comprising a driving unit that performs a focus adjusting operation according to a distance of an object. 19. The imaging optical system is moved in the first direction by linking the viewfinder, and then the imaging optical system is moved in the second direction to disconnect the link with the viewfinder. There is a driving unit for performing a focus adjusting operation according to the distance of the object and further for moving the image forming optical system to a predetermined position in the first direction after the completion of the photographing operation in a state of disconnecting from the finder. It is characterized by the above-mentioned.
The optical device according to any one of 3 above. 20. The imaging optical system is moved in the first direction by linking the viewfinder, and then the imaging optical system is moved in the second direction to disconnect the link with the viewfinder. 2. A drive unit for moving the image forming optical system in the first direction in a state where the image forming optical system is disconnected from the finder to perform a focus adjusting operation according to a distance of an object. The optical device according to any one of 1 to 13. 21. The imaging optical system is moved in the first direction by linking the viewfinder, and then the imaging optical system is moved in the second direction to disconnect the link with the viewfinder. The image forming optical system is moved in the first direction in a state where the image forming optical system is disconnected from the viewfinder to perform the focus adjusting operation according to the distance of the object, and further, after the photographing operation is completed, the image forming optical system. 14. The optical device according to claim 1, further comprising drive means for moving the lens to a predetermined position in the second direction in a state where the lens is disconnected from the finder. 22. An image forming optical unit is alternately provided with a magnification changing guide area and a focus adjusting guide area, and the image forming optical unit is guided along the magnification changing guide area and the focus adjusting guide area. A guide means for causing an optical unit to perform a zooming operation and a focus adjusting operation, and linked with that the imaging optical unit is guided in one direction along a zooming guide area and a focus adjusting guide area of the guide means. And the finder is operated to guide the imaging optical unit in one direction along the magnification changing guide area and the focus adjusting guide area of the guide means, and then the focus adjusting guide area of the guide means. And a linking unit that disconnects the link of the finder with respect to being guided in a direction different from the one direction. 23. The linking means continuously links the finder in association with the image forming optical unit being guided in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means. 23. The optical device according to claim 22, wherein the optical device is operated in accordance with the present invention. 24. The linking means links the imaging optical unit in one direction along a guide area for zooming of the guide means and a guide area for focus adjustment, and zooms the viewfinder. 23. It is made to operate | move.
The optical device according to. 25. The linking means continuously links the viewfinder with the image forming optical unit being guided in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means. 23. The optical device according to claim 22, wherein the optical device is operated to change the magnification. 26. The linking means is arranged to guide the imaging optical unit in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means, and then further to adjust the focus of the guide means. 3. A deactivating means for preventing the viewfinder from changing its magnification with respect to being guided in a direction different from the one direction along the guide region.
The optical device according to any one of 2 to 25. 27. The optical device according to claim 26, wherein the inactivating means has a holding means for holding the finder so that the finder does not operate. 28. The optical device according to claim 27, wherein the holding device provides friction so that the finder does not move. 29. The imaging optical unit is guided in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means, and further along a focus adjusting guide area of the guide means. 29. The optical device according to claim 22, further comprising a control unit that performs a focus adjustment operation according to a distance of an object when being guided in a direction different from the one direction. 30. A control means for setting a desired magnification when the image forming optical unit is guided in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means. The optical device according to any one of claims 22 to 28. 31. The optical device according to claim 22, wherein the linking means has a space forming portion for breaking the link with the finder. 32. The linking means operates the finder in cooperation with the image forming optical unit being guided in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means. After that, the image forming optical unit is guided along a focus adjustment guide area of the guide means in a direction different from the one direction for a predetermined section, and after disconnecting the viewfinder, the connection is further performed. 23. The finder is linked again with respect to that the image optical unit is guided in a direction different from the one direction along the focus adjustment guide region of the guide means.
The optical device according to any one of 32. 33. The imaging optical unit is driven in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means, and then further moved along the focus adjusting guide area of the guide means. 32. The optical device according to claim 22, further comprising a driving unit that drives in a direction different from one direction. 34. The optical device according to claim 33, wherein the drive unit includes an electric motor. 35. The optical device has position determination means for determining a guide position of the imaging optical unit by the guide means, and the drive means drives the drive according to the determination result of the position determination means. 35. The optical device according to claim 33, further comprising a control unit for controlling the. 36. The imaging optical unit is driven in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means, and then further moved along the focus adjusting guide area of the guide means. Drive means for driving the imaging optical unit in a direction different from the one direction to drive the imaging optical unit in the one direction along a focus adjustment guide area of the guide means in a state of disconnecting from the finder. The optical device according to any one of claims 22 to 31, which is characterized by being characterized. 37. The image forming optical unit is driven in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means, and then further moved along the focus adjusting guide area of the guide means. 32. The optical device according to claim 22, further comprising a driving unit that is driven in a direction different from one direction to perform a focus adjustment operation according to a distance of an object. 38. The image forming optical unit is driven in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means, and then further moved along the focus adjusting guide area of the guide means. The focus is adjusted in accordance with the distance to the object by driving in a direction different from the one direction, and after the shooting operation is completed, the focus of the guide means is disconnected with the image forming optical unit disconnected from the viewfinder. The optical device according to any one of claims 22 to 31, further comprising a driving unit that drives the optical disc to a predetermined position in the one direction along an adjustment guide region. 39. The image forming optical unit is driven in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means, and then further moved along the focus adjusting guide area of the guide means. The object is driven in a direction different from the one direction, and further, in a state where the image forming optical unit is disconnected from the finder, the image forming optical unit is driven in the one direction along the focus adjustment guide area of the guide means to move the object distance. 22. A driving means for performing a focus adjusting operation according to claim 23,
1. The optical device according to any one of 1. 40. The imaging optical unit is driven in one direction along a magnification changing guide area and a focus adjusting guide area of the guide means, and then further moved along the focus adjusting guide area of the guide means. Driving in a direction different from one direction, the imaging optical unit is driven in the one direction along the focus adjustment guide area of the guide means in a state where the linkage with the finder is cut off, and the distance to the object is increased. A focus adjustment operation is performed in accordance with the focus adjustment operation, and after the photographing operation is completed, the image forming optical unit is disconnected from the finder in a direction different from the one direction along the focus adjustment guide area in a state where the linkage with the finder is cut off. 32. The optical device according to claim 22, further comprising a driving unit that drives the optical disc to a predetermined position. 41. The optical device according to claim 22, wherein the optical device is a camera. 42. The optical device according to claim 22, wherein the imaging optical unit is a taking lens.