JP3372304B2 - Camera viewfinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera finder.
Structure, more specifically, the fine
About the DA mechanism. [0002] 2. Description of the Related Art A camera finder having zooming means.
Various structures have been conventionally proposed. As an example of such a device, for example,
Japanese Patent Publication No. Sho 54-26721 discloses a finder optical system.
That the size of the field of view changes due to movement
You. Further, Japanese Patent Application Laid-Open No. 1-1107240 discloses
Changes the size of the viewfinder frame in conjunction with the magnification of the eyepiece.
Disclosed are those that vary in size. [0005] Problems to be Solved by the Invention
No. 721 discloses a finder with variable magnification.
The camera is large because it uses the objective optical system of the camera.
There is a problem that becomes. [0006] Also, Japanese Unexamined Patent Publication No. Hei.
In the embodiment, the zoom movement of the eyepiece is
The thickness of the camera has increased due to zooming
There is a problem that it becomes large. In addition, the finder
Because a liquid crystal device that displays within the field of view is used,
Electrical control is also required. The present invention has been made in view of such a problem.
In conjunction with a change in the size of the viewfinder's field of view.
Viewfinder mechanism for a small camera capable of zooming
It is intended to provide. [0008] Means for Solving the Problems To achieve the above object,
For example, the finder mechanism of the camera according to the present invention includes:First
Switch the shooting screen range between the screen range and the second screen range
Possible camera finder mechanism,Finder light
By being inserted into the academic system,
Retract from the viewfinder optical system to the corresponding first field of view
The second screen area corresponding to the second screen area
Of the viewfinder optical system
A field mask for switching panorama etc.,Finder light
By being inserted / retracted into the optical path of the eyepiece optical system
Eyepiece zoom lens that changes the viewfinder magnification,Insert
Between the retracted position and the retracted position.
The above-mentioned eyepiece zoom lens is relatively slidable along the sliding direction of
While supporting the camera,
An ocular variable power lens frame having a field mask integrally fixed
When,Viewfinder according to the range of the shooting screen that can be switched
Slide the eyepiece zoom lens frame so that
Drive means and,The eyepiece is disposed on the eyepiece zoom lens frame,
The contact, which is slidably supported by the variable-power lens frame,
The variable power lens is placed in the optical path of the eyepiece optical system of the viewfinder optical system.
A lens urging member for urging in the insertion direction;,The eyepiece change
When the double lens frame slides to the insertion position, the lens
The eyepiece zooming urged in the insertion direction by the lens urging member
By contact with the lens,
On the other hand, the eyepiece variable power lens is biased by the lens biasing member.
Sliding in the direction opposite to the insertion direction
Then, position the ocular variable power lens at the specified insertion position.
And a contact member. [0009] [Operation]The above-mentioned panoramic field mask is fixed integrally.
The eyepiece zoom lens frame that is installed and
The eyepiece zoom lens when sliding between
Is not in contact with the contact member, the eyepiece change
The double lens moves integrally with the eyepiece zoom lens frame,
When the eyepiece zoom lens frame slides to the above insertion position,
When the lens is biased in the insertion direction by the lens biasing member.
By contacting the eyepiece zoom lens, the eyepiece zoom
Biasing the eyepiece zoom lens against the lens frame
Sliding in the direction opposite to the above insertion direction against the urging force of the member
The eyepiece zoom lens into the specified insertion position.
Position with the contact member. [0010] Embodiments of the present invention will be described below with reference to the drawings.
I do. 1 to 25 show an embodiment of the present invention.
It is. The appearance of this camera 1 is shown in FIGS.
The front side is the front cover 3 and the rear side
With the rear cover 4 and the front of the front cover 3.
The lens frame 2 is located almost in the center on the side, and the exterior
A back cover 6 is provided on the rear side to open and close freely.
are doing. The front cover 3 has various components inside the camera.
A member that covers the member from the front, and holds the camera 1 on the left side
Grip portion 3a is provided. This grits
A strobe light emitting section is disposed inside the top section 3a.
A strobe window 11 made of a transparent panel is provided.
In the vicinity of the left side of the strobe window 11, the
Projection 3b for preventing finger from touching trolley window 11
Is provided. Also, on the upper surface of the front cover 3
Is equipped with a release button 12 for performing a release operation on the left side.
Around the projection 13a with a finger
By rotating the release button 12 left and right around the center
A zoom dial 13 for performing zooming is provided.
On the right side of the release button 12 is a transparent LCD for display.
An LCD window 14 as a bright window is provided, and a
Operation buttons 15, 16, 17 for switching between various modes
Are arranged side by side, and a panoramic shot is
Panorama button 1 to switch between normal and normal shooting conditions
8 are provided. The lens barrel 2 is provided with a photographing lens (not shown).
This is a cylindrical frame member that supports the nozzle. This lens frame 2
Open the lens opening at the front of the optical axis when shooting.
To allow the luminous flux to pass through
A lens barrier 25 for shielding to protect the shadow lens,
26 are provided. The rear cover 4 covers the rear side of the camera.
An exterior member that protrudes to cover the viewfinder eyepiece
4a is provided on the upper right side, and
At the top of -4, switch the camera power on / off
Power button 21 and operation to switch between various camera modes
Buttons 22 and 23 are provided. The back cover 6 is provided at the rear of the camera,
A lid member for taking in and out the film. The exterior panel 7 serving as the light-transmitting member is provided at the front side.
Fixed to the side cover 3 by adhesion or welding, etc.
It is one of the members that make up the appearance of the camera. This exterior panel
7 is on the surface of the transparent memberThe transparency with the light-shielding paint film printed
Ming sheet, togetherFor example, injection molding by in-mold molding
Have been. This exterior panel 7 is
Finder entrance window 7b and photometric window at upper right position
7a are provided, and these windows 7b and 7a
Paint filmPrintIt does not have translucency.
The viewfinder entrance window 7b and the photometric window 7a
An AF projection window 7c is located at a position between the lens barrels.
An AF light receiving window 7d is located at a position slightly above and to the left of 2
Each of them is provided with only infrared light
A light-shielding paint having the following properties is used. AF receiving window 7
A self-timer LED window 7e is provided near the left side of d.
It is a type of light blocking type that transmits red light
Paint is used.
Lighting of the provided display LED can be observed from outside
It has become so. FIG. 3 shows the structure of the finder unit.
FIG. The power behind the optical axis of the exterior panel 7
Inside the camera, as shown in FIG.
At the position above the rotating frame 2a, which is a component,
The printer unit 5 is provided. This finder uni
The cutout 5 is provided with various types of finder structural members 50 as frame members.
Units such as a photometer, an AF projector, an AF receiver,
Finder optical system, finder zooming drive mechanism, etc.
The components are attached. The photometric section is provided on the exterior panel 7 for photometry.
The viewfinder structure is provided behind the optical axis of the window 7a.
Hole 50f formed substantially at the center of the front side of the material 50
And a light receiving means attached behind the optical axis for photometry
And a light receiving element 72. The AF light projecting section is provided with the A
It is provided behind the optical axis of the F light projection window 7c,
An AF light projection lens 76 fixed to the damper structural member 50;
AF projection LED (not shown) arranged behind the optical axis
Consists of The AF light receiving section is provided with the A
F is provided behind the optical axis of the light receiving window 7d,
An AF light receiving lens 77 fixed to the damper structural member 50;
An AF light receiving element (not shown) disposed behind the optical axis;
Consists of The finder optical system will be described below.
Finder objective lens group. Fixed objective lens
51 is an entrance window for the finder of the exterior panel 77bof
The finder structure member 50 is provided behind the optical axis.
It is positioned and fixed at the right end on the front side. Light flux incident from the fixed objective lens 51
Is provided to the first variable power lens 52 disposed behind the optical axis.
It is designed to be incident. This first variable power lens 52
Is a shaft insertion portion 52 having a cam follower portion 52b at the top.
c, and a rotation stopper 52a protrudes from the bottom.
are doing. As a result, the first variable power lens 52 is
Sliding of finder objective lens as guide axis by through section 52c
While being supported by the shaft 59, the rotation stopper 52a is
Engage with the fitting groove 60a formed in the lens base plate 60
By doing so, it is possible to slide in the optical axis direction. The light beam from the first variable power lens 52 is
Further, the light enters the second variable power lens 53.
You. The second variable power lens 53 has a cam follower
A shaft insertion portion 53c having a portion 53b
A rotation stopper 53a protrudes from the portion. This
The second variable power lens 53 is fired by the shaft insertion portion 53c.
While being supported by the
The stopper 53a is fitted on the finder lens main plate 60 by fitting.
By engaging with the joint groove 60a, it can slide in the optical axis direction.
Has become. Further, the finder light beam is transmitted to a
Via a first prism 54 and a second prism 56 (see FIG. 4)
After that, it enters the eyepiece zoom lens 57
You. This eyepiece zoom lens 57 is used for panoramic photography or
To increase the magnification of the viewfinder field during trimming shooting
A lens, which is configured to be movable as described later.
I have. The light image that has passed through the eyepiece zoom lens 57
Enters the fixed eyepiece 58. This fixed eyepiece
The bracket 58 has a mounting portion 58a protruding from below, and will be described later.
Through the fixed shaft 50f (see FIG. 15)
Positioned and fixed to the finder structural member 50
You. The cam follower of the first variable power lens 52
Section 52b and cam follower section 53 of second variable power lens 53
b, urging means mounting portions 52d and 53d are protrudingly provided, respectively.
And the second urging means 66 is attached to them.
The first variable power lens 52 and the second variable power lens 53
Is urged in the pulling direction. With this,
These cam followers 52b and 53b are
In the direction of contact with the cam portions 61a and 61b of the
It is energizing. Driving such a finder optical system
Finder zooming drive mechanism for zooming with
Is configured as described below. Rotating member 6
Reference numeral 3 denotes a gear unit 63a and a driving belt winding unit 63b.
Coaxially connected and rotatable by the rotating member shaft 64
Noh is supported. The gear portion 63a is
Gear portion 2b formed on the peripheral surface of the rotating frame 2a of the zoom lens frame 2
And the rotation of the rotating frame 2a is controlled by the cam portion.
Transmitted to the material 61, thereby zooming the finder
It is supposed to do. The driving belt 62 includes a rotating member 63 and a cam.
One of the members 61
Is transmitted to the other, and the rotating member 63
The driving belt winding portion 63b and the driving belt
Both ends are fixed to the tilt winding part 61c. For this drive
In one direction, the driving force of the belt 62 is
Therefore, the other direction is the urging force of the first urging means 65 (see FIG. 4).
Supplied by At this time, the driving belt winding section 63b
And by changing the winding diameter of the driving belt winding portion 61c.
Thus, the reduction ratio can be set arbitrarily. In addition, the drive
The movement belt 62 is located at the belt position of the finder structural member 50.
The position is regulated by the placement regulating unit 50d. As described above, the driving belt 62 and the rotating frame 2
a and a photometric section and AF
Space can be used effectively by arranging a light-emitting section, etc.
This makes it possible to reduce the size of the camera body. The cam member 61 is connected to the finder structural member 50.
With a spacer protruding forward from the right end of the
The cam member shaft portion 50e (see FIG. 4)
Supported. This cam member 61 is, as described above,
The cam follower portion 52b of the variable power lens 52
A cam portion with which the cam follower portion 53b of the double lens 53 contacts.
61a and 61b are formed on the peripheral surface, and
One end of the driving belt 62 is fixed to the peripheral surface of the end.
Drive belt winding section 61c. As described above, the rotating member 63 and the cam member 61
Because it is connected by the drive belt 62, the finder light
Even if the academic system has a layout separated from the lens barrel 2,
A finder optical system capable of interlocking with the operation of the lens barrel 2 is constructed.
Can be achieved. Also, the rotating member 63 and the cam member 6
1, it is possible to arrange a photometric unit, an AF unit, etc.
Therefore, the degree of freedom of layout is increased and the layout can be performed efficiently
As a result, the camera body must be downsized.
Can be. FIG. 4 is an oblique view showing the configuration of the finder lens group.
FIG. 5 is a perspective view, and FIG.
FIG. 4 is a perspective view showing a state in which the rhythm is assembled. Fixed plug
The rhythmic first prism 54 is a finder objective lens.
The beam incident from the group is inverted about 180 ° in a horizontal U-shape.
It is attached to the viewfinder structural member 50
Have been. The visual field mask 55 is a screen support in a normal state.
This is a member that shows the field of view of the
A first prism 54 and a second prism located on the image plane;
The position is fixed so that it is sandwiched by 56
You. The second prism 56 is provided with the first prism 5
The light beam incident from 4 is inverted about 180 ° in a vertical U-shape.
The finder structural member 50 and the first pre-
The position is fixed by the mechanism 54. Viewfinder lens base plate 6 serving as rotation restricting member
0 indicates that a fitting groove 60a parallel to the optical axis direction is formed.
A fixed objective lens 51 and a first prism
The position is determined by holding one end of each by 54
I have. As described above, the first variable magnification lens is provided in the fitting groove 60a.
Of the rotation stopping portion 52a of the lens 52 and the rotation of the second variable power lens 53
The stopping portion 53a is engaged, and both finder objective lens slides are engaged.
The rotation around the driving shaft 59 is restricted. The first urging means 65 has fixed arms 65 at both ends.
a and a moving arm 65b.
The fixed arm 65a has a finder structure.
The moving arm 6 is fixed to the cam member shaft portion 50e of the member 50.
5b is fixed to the cam member 61. This first pusher
The step 65 always moves the cam member 61 in the rotation direction indicated by the arrow F.
And the cam member 61 is driven by this.
In addition, the driving belt 62 is slack even in the stop state.
I'm trying. FIG. 6 shows an objective lens group in a telephoto state.
And FIG. 7 is a plan view showing a cam member and a cam member.
FIG. 3 is a plan view showing an objective lens group and a cam member in a state.
You. As shown, the power of the first variable power lens 52 is
The end face on the optical axis rear side of the mu follower portion 52b is
The first variable magnification lens 5 is in contact with the first cam portion 61a.
The end face of the cam follower portion 53b on the optical axis front side is a cam
It is in contact with the portion 61b. The rotation of the rotating frame 63 is performed by rotating the rotating frame 2a.
And the cam member 61 rotates via the driving belt 62
And the first variable power lens 5 along the cam portions 61a and 61b.
The second and second variable power lenses 53 move in the optical axis direction.
At this time, the cam portions 61a and 61b and the cam follower portion 52
finder objective lens sliding shaft 5
9, a first zoom lens 52 and a second zoom lens
The finder lens main plate 60 is fixed so that the lens 53 does not rotate.
The rotation stoppers 52a, 53a engage with the fitting groove 60a of
The rotation is regulated. FIGS. 8 to 14 have a zoom function.
No first configuration for improving the position accuracy of the finder optical system
It is sectional drawing which shows a 7th example. When applying to cameras
Is to ensure the performance of the lens
Select the most appropriate one if necessary, considering the ease of assembly
Just do it. As shown in FIG. 8 as a first example, the finder pair
Both ends of the object lens sliding shaft 59 are fixed on the front side of the optical axis.
Objective lens 51 and finder structural member 50 on the rear side of the optical axis
Supported by The finder lens base plate 60 is
The fixed objective lens 51 and the first prism 54 respectively
The position is determined while holding one end. Objective lens 5
The first and first prisms 54 are finder structural members, respectively.
It is positioned and fixed at 50. Fixed by this
Finder objective lens sliding shaft 5 with respect to objective lens 51
9 and the position of the fitting groove 60a of the finder lens base plate 60
Accuracy and finder lens for first prism 54
Position accuracy of the fitting groove 60a of the base plate 60 is improved.
For the fixed objective lens 51 and the first prism 54,
Relative position of first zoom lens 52 and second zoom lens 53
The accuracy of is improved. The finder optical system for zooming is made smaller.
If you try to do so, the relative position accuracy of each lens is strictly required
However, according to the configuration shown in FIG.
If the fixed objective lens 51 and the first prism 54
Relative position of first zoom lens 52 and second zoom lens 53
Finder optical system
Can be reduced, resulting in a smaller camera.
Can be In addition, a highly accurate finder optical system
The optical axis does not deviate due to
A finder with reduced impact and good visibility
Can be. FIGS. 9 to 14 show the structure shown in FIG.
5 shows other examples of the configuration. FIG. 9 shows a second example.
As shown, the finder objective lens sliding shaft 59 is
Both ends are fixed objective lens 51 on the optical axis front side and optical axis rear side.
Are supported by the finder structural member 50. Fa
The inner lens base plate 60 is connected to the fixed objective lens 51 and the fiber.
Position by holding each one end by the solder structural member 50.
Is determined. Fixed objective lens 51 and first prism
54 are positioned on the finder structural member 50, respectively.
Is fixed. Thereby, the fixed objective lens 51
Objective lens sliding shaft 59 and fitting groove 6
0a, the positional accuracy of the fixed objective lens 51 is improved.
Of the first zoom lens 52 and the second zoom lens 53
The accuracy of the relative position is improved. Other parts are shown in FIG.
This is almost the same as that shown in FIG. As shown in FIG.
Both ends of the objective lens sliding shaft 59 are fixed on the front side of the optical axis.
The constant objective lens 51 and the first prism 54 on the rear side of the optical axis
Supported. Finder lens base plate 60 is fixed
The objective lens 51 and the finder structural member 50 respectively
The position is determined by holding one end. Fixed objective
The lens 51 and the first prism 54 each have a finder structure.
It is positioned and fixed to the structure member 50. By this
Finder objective lens slide with respect to the fixed objective lens 51
Positional accuracy of dynamic shaft 59 and fitting groove 60a, first prism 5
Positional accuracy of finder objective lens sliding shaft 59 with respect to 4
The fixed objective lens 51 and the first prism 5
A first variable power lens 52 and a second variable power lens 5
The accuracy of the relative position 3 is improved. Other parts are above
It is almost the same as that shown in FIG. As shown in a fourth example in FIG.
The two ends of the objective lens sliding shaft 59 are connected to the front of the optical axis.
Finder structural member 50 and first prism 54 on the optical axis rear side
Supported by The finder lens base plate 60 is
The finder structural member 50 and the first prism 54
The position is determined by holding one end. Fixed objective
The lens 51 and the first prism 54 are each provided with a finder.
It is positioned and fixed to the structural member 50. This
Finder objective lens with respect to the first prism 54
Because the positional accuracy between the moving shaft 59 and the fitting groove 60a is improved.
A first variable power lens 52 for the first prism 54;
The accuracy of the relative position of the second variable power lens 53 is improved. So
The other parts are almost the same as those shown in FIG.
You. As shown in a fifth example in FIG.
Both ends of the objective lens sliding shaft 59 are fixed on the front side of the optical axis.
The constant objective lens 51 and the first prism 54 on the rear side of the optical axis
Supported. Finder lens base plate 60 is fixed
One end by the objective lens 51 and the first prism 54 respectively
The part is held and the position is determined. Fixed objective lens 5
The first and first prisms 54 are finder structural members, respectively.
It is positioned and fixed at 50. Fixed by this
Finder objective lens sliding shaft 5 with respect to objective lens 51
9 and the positioning accuracy of the fitting groove 60a, and the first prism 5
4 and finder objective lens sliding shaft 59 and fitting groove
Since the positional accuracy of the fixed objective lens 51
And the first variable power lens 52 for the first prism 54 and the first
The precision of the relative position of the second variable power lens 53 is improved. That
Other parts are almost the same as those shown in FIG. As shown in a sixth example in FIG.
Both ends of the objective lens sliding shaft 59 are fixed on the front side of the optical axis.
The constant objective lens 51 and the first prism 54 on the rear side of the optical axis
Supported. The finder lens base plate 60 is
Respectively by the indah structural member 50 and the first prism 54
The position is determined while holding one end. Fixed objective lens
Each of the lens 51 and the first prism 54 has a finder structure.
It is positioned and fixed to the member 50. by this
Viewfinder objective lens sliding relative to fixed objective lens 51
The positional accuracy of the shaft 59 and the position of the first prism 54
Position of slider objective lens sliding shaft 59 and fitting groove 60a
Since the precision is improved, the fixed objective lens 51 and the first prism
A first zoom lens 52 and a second zoom lens
The accuracy of the relative position of the nozzle 53 is improved. Other parts are
This is almost the same as that shown in FIG. As shown in FIG.
The two ends of the objective lens sliding shaft 59 are connected to the front of the optical axis.
Finder structural member 50 and first prism 54 on the optical axis rear side
Supported by The finder lens base plate 60 is
The fixed objective lens 51 and the first prism 54 respectively
The position is determined while holding one end. Fixed objective lens
Each of the lens 51 and the first prism 54 has a finder structure.
It is positioned and fixed to the member 50. by this
Positioning of the fitting groove 60a with respect to the fixed objective lens 51
And the finder objective lens for the first prism 54.
Position accuracy between the lens sliding shaft 59 and the fitting groove 60a is improved.
Therefore, the fixed objective lens 51 and the first prism 54
Relative position of first variable power lens 52 and second variable power lens 53
The accuracy of placement is improved. Other parts are shown in FIG.
It is almost the same. FIG. 15 shows the structure of the panorama switching of the finder section.
FIG. 3 is a perspective view showing a camera, as viewed from the rear side. Fixed
The eyepiece 58 is connected to the fixed shaft 5 of the finder structural member 50.
0f and fixed to the finder structural member 50.
Incident surface of the second prism 56nearImaged on
The subject image is observed. This and
In the state shown in the figure,
The finder can be observed at a certain rate. The panorama switching axis 68 is connected to the finder optical axis.
Both ends with respect to the finder structural member 50 in the direction orthogonal to
Is fixedly mounted. The eyepiece zoom lens frame 67 is provided with the eyepiece zoom lens.
Holding the lens 57 and an elongated, approximately U-shape
Finder panoramic field mask 67a
The panorama switching shaft 68
Slidably held. The eyepiece zoom lens frame 67
The rotation stop 67b protruding from one end of the
The panoramic switching shaft 68 of the indah structural member 50 is substantially flat.
By engaging the groove 50c engraved in the row, the panorama
The rotation around the switching shaft 68 is restricted. The eyepiece zoom lens frame 67 has a finder structure.
Compressed by being inserted through panorama switching shaft 68 between member 50
The panorama switching spring 69 in the
Is inserted in front of the fixed eyepiece 58 of the viewfinder.
It has become. When inserted, the panorama size
Screen and the viewfinder magnification is increased.
This makes the viewfinder easier to see. The eyepiece zoom lens 57 is provided with an eyepiece lens 5.
8 increases the viewfinder magnification by being inserted before
Lens in the eyepiece zoom lens frame 67.
The lens frame 67 is configured to be slidable in the moving direction.
Is biased leftward in FIG.
You. The lens urging spring 70 is provided with an eyepiece zoom lens frame 67.
Pins protruding from67eAnd buckled
And so on. FIG. 16 and FIG.
FIG. 16 is a diagram showing the switching operation, and FIG.
It is a plane sectional view at the time of a state. Eyepiece zoom lens 5
7 indicates that the projecting abutting portion 57a is attached to the lens biasing spring 70.
Abuts projection 50b of finder structural member 50 by force
Then, the position can be accurately determined. this
Allows the optical axis of the eyepiece zoom lens 57 to be set in the viewfinder optical system.
Is precisely aligned with the optical axis. Also, an eyepiece zoom lens
57 is provided with two projections 57b projecting from the lower surface.
These projections 57b are formed in the eyepiece zoom lens frame 67.
Two elongated holes 67c elongated in the direction perpendicular to the finder optical axis
Regulates the position in the optical axis direction by engaging
At the same time, it is possible to slide in the direction along the long hole 67c.
ing. The eyepiece zoom lens frame 67 is
Insertion of the eyepiece zoom lens 57 by the Norama switching spring 69
Direction, but the spring force of the lens urging spring 70
So that the spring force of the panorama switching spring 69 becomes stronger
The eyepiece zoom lens frame 67 is
The spring is not pushed back by the spring force of the slide urging spring 70. This
As a result, the eyepiece zoom lens frame 67 is
7, the insertion position can be determined. On the other hand, the viewfinder panoramic field mask 6
7a is a lateral direction orthogonal to the finder optical axis as described above.
Even if it is inserted from the
Instead, it is inserted into a position as shown by reference numeral 67a 'in FIG.
I just need. This limits the field of view in the short side direction during panorama.
Is also used as the mask on the short side of the visual field mask 55,
Viewfinder panoramic field mask provided in a U-shape
Reference numeral 67a denotes a field of view on a side along the long side by masking the long side.
This is because only regulations are made. FIG. 17 shows a state where the finder is in a normal screen state.
It is a plane sectional view at a certain time. Panorama shown in FIG. 16 above
From the shooting state, a panorama switching gear 71 (see FIG.
0), the urging force of the panorama switching spring 69
When the eyepiece zoom lens frame 67 is returned to the state shown in FIG.
The viewfinder 67a for the viewfinder panorama also returns
Returning to the normal screen size, the eyepiece zoom lens 57
And the viewfinder magnification returns to the normal state. FIG. 18 shows the viewfinder in a panoramic state.
FIG. Viewfinder panorama
The screen 67a, as shown in FIG.
After the normal screen size field mask 55 arranged on the surface
In the vicinity of the first prism 54 and in the vicinity of the front side of the first prism 54.
That is, close to the image plane of the finder objective lens.
It is inserted beside. The eyepiece zoom lens 57 is fixed as described above.
Inserted between the fixed eyepiece 58 and the second prism 56
And the projecting projection 57b is fixed to the length of the eyepiece zoom lens frame 67.
By engaging with the hole 67c, the finder optical axis direction
Of the eyepiece zoom lens 57
It is free in the direction of movement. FIG. 19 shows the eyepiece zoom lens shown in FIG.
View the frame 67 from the direction of arrow J and
FIG. 5 is a diagram showing a cross section of the field mask portion of FIG. Normal screen viewing
The field mask 55 is, as described above, the second prism 56
1 is arranged near the entrance surface facing the prism 54.
This position is the image plane of the viewfinder optical system.
You. Viewfinder panoramic field mask 67a
Is in the position as shown in FIG. 19 in the normal screen.
However, at the time of panorama, the position as shown by reference numeral 67a 'in FIG.
To cover the top and bottom of the field mask 55 on the normal screen.
It is designed to hide. As described above with reference to FIGS.
According to such a configuration, the eyepiece variable power lens 57 is
Regardless of the insertion position of the da panorama visual field mask 67a
Independently and accurately positioned,
The viewfinder panoramic view mask 67a is particularly accurate.
Panorama viewfinder without positioning
can do. In this manner, the panorama screen size
When shooting in close-up mode, the
The viewfinder image can be increased because
It is easy to observe and close to the magnification when printing.
It is possible to give a feeling of place. Further, at the time of panorama, an area outside the photographing screen
Is shaded on the viewfinder, so the subject
It is possible to reliably prevent photographing caused by the mask.
In addition, with the above simple configuration, zooming of the viewfinder and field of view
The viewfinder unit is
Smaller and, as a result, smaller cameras.
You. FIGS. 20 and 21 show the photographing screen and the viewfinder.
FIG. 3 is a diagram showing a normal state and a panoramic state of a visual field mask unit.
You. As shown in FIG. 20, the camera 1 has a substantially central portion.
Has a rectangular shooting screen opening 8c, and a spool
Room 8b, camera body 8 having patrone room 8a on left side
It has. The camera body 8 includes an upper light shielding mask 81
Switching mechanism 85 having a lower and light shielding mask 82
(All are not shown.)
The optical mask 81 and the lower light shielding mask 82 are moved up and down as needed.
The luminous flux passing through the photographic screen opening 8c is regulated accordingly.
The normal screen size and panorama screen size.
It is designed to switch. The upper light shielding mask 81
And the lower light-shielding mask 82 is guided vertically by an axis 83.
And are connected to each other by biasing means 84.
ing. The camera body 8 is further provided with a finder unit.
While holding the finder structural member 50 of the unit 5,
Tells the movement of the mask on the shooting screen to the eyepiece zoom lens frame 67
The panorama switching gear 71 consisting of two gears can be rotated.
Holding. The finder structure of the finder unit 5
The material 50 holds the above-described ocular variable power lens 57 and
And the viewfinder panoramic field mask 67a
It holds the fixed eyepiece zoom lens frame 67.
Also, the eyepiece zoom lens frame 67 is a rack which is a second rack.
67d, the large diameter gear of the panorama switching gear 71
Gear 71a. The upper light shielding mask 81 is used for the panorama switching.
The first gear meshing with the small-diameter gear 71b of the gear 71
The rack 81c is opened with the spool chamber 8b and the shooting screen.
It is integrally fixed to the upper space between the mouths 8c.
Panorama switching gear by vertical movement of side light shielding mask 81
71 is rotated. Upper light shielding mask 8
The vertical movement of 1 is not shown in detail, but the above panorama switching
It is operated by a mechanism 85. Whether the photographing screen is in the normal state as shown in FIG.
Switch to the panorama state as shown in FIG.
The rack 81c moves downward,
small diameter gear of the panorama switching gear 71 meshing with the gear c
71b is rotated. Along with this, panorama
The large-diameter gear 71a of the switching gear 71 also rotates integrally,
The large-diameter gear 71a meshes with the rack 67d.
Movement of the upper light shielding mask 81
Move in the direction perpendicular to the direction (right direction in the drawing). The eyepiece zoom lens frame 67 is
In the Lama state, the viewfinder panoramic field mask 6
7a is inserted in front of the finder field mask 55 in the normal state.
The upper and lower screen areas when looking through the viewfinder.
It can be observed in a light-shielded state. In addition, the panorama state as shown in FIG.
When returning to the normal state as shown in FIG.
When the optical mask 81 moves upward, the rack 81
c moves upward, and the gear meshing with the rack 81c moves.
Small-diameter gear 71b of Norama switching gear 71 rotates left in the figure.
Let me do. Accordingly, the panorama switching gear 7
The large-diameter gear 71a also rotates integrally with the large-diameter gear 71a.
-71a and the eyepiece zoom lens engaged with the rack 67d.
The lens frame 67 moves to the left in the drawing, as shown in FIG.
Return to the normal state. As described above with reference to FIGS.
According to such a configuration, switching of the shooting screen size and fine
To switch the field mask of
You can shoot without missing a chance
Size of the shooting screen and viewfinder screen
Is incorrect, or the subject is blocked
There is no need to take pictures taken by the mask. Further, as described above, the sp
Rack in the upper space between the rule room 8b and the photographing screen opening 8c.
81c, and a rack 67 is provided above the photographing screen opening 8c.
d, and connect them with the panorama switching gear 71.
The upper light-shielding mask 81 is moved up and down to move
The indanopanoramic field mask 67a is replaced with the upper light-shielding mask 8.
1 to move in the direction perpendicular to the operation direction.
With this, the camera can be efficiently placed inside the camera.
A small camera. In the above configuration, the rack 81c is
Instead of being disposed on the spool chamber 8b side, the patrone chamber 8
a rack 81c in the upper space between
And make the other parts almost the same.
It doesn't matter. FIGS. 22A and 22B show the viewfinder.
The normal screen and the panorama screen
FIG. Normal screen as shown in FIG.
Means that the inside of the field mask 55 is almost exposed to film
The area to be shaded is shown. As described above, the incident side of the second prism 56
Is the image plane of the viewfinder optical system.
Various targets (for example, various display means, etc.)
By arranging them, it is possible to observe them during shooting. this
At the entrance surface of the second prism 56, the para
Correction marks 56a and 56b are engraved,
It can be observed together with the object image. Parallax correction mark 56a for normal screen
Indicates the parallax correction position in the normal screen.
And is indicated by a parallax correction mark 56a for a normal screen.
Be sure to shoot subjects inside the line when shooting at close range.
Indicates the range in which This normal screen parallax
Box correction mark 56a has a thickness that is easy to see during a normal screen.
ing. On the other hand, the parallax correction
The mark 56b is a parallax correction position during panorama.
It is provided so that it has meaning in the normal screen state
Because there is no display, the observation field of view in this normal screen
In order not to disturb, the width of the line is narrowed and engraved. A panorama screen as shown in FIG.
Is integrally fixed to the above-mentioned ocular variable power lens frame 67.
The viewfinder panoramic field mask 67a
Observed when inserted into the optical path,
The upper and lower parts are shaded and look long sideways. At this time, the lens is held by the eyepiece zoom lens frame 67.
The eyepiece zoom lens 57 is also inserted into the finder optical path at the same time.
And the viewfinder magnification is increased. This is small
Enlarged shooting screen for easy viewing or powerful
This is to provide a finder. At the same time, the pano mentioned above
Parallax correction mark 56b for llama screen is also enlarged
It will be seen. The parallel pan for the enlarged panorama screen
Box correction mark 56b is displayed when the screen size is normal.
Parallax correction mark for normal screen that could be detected
It is configured to be easy to see with the same thickness as 56a
Have been. And parallax correction marker for normal screen
In the panorama, the ghost 56a hides outside the range of the visual field.
Become invisible. In the above description, the parallax correction mark 5
6a and 56b are stamped on the incident surface of the second prism 56
However, it may be drawn by sputtering or printed.
Needless to say. In addition, the finder optical system
Therefore, the lens surface of the viewfinder and the prism
On the surface that the photographer can observe, such as the exit surface of the camera.
I don't know. In addition to the parallax correction mark described above,
Are examples as shown in FIGS. 23A and 23B.
This figure shows the normal view when observing the viewfinder.
Diagram showing screen and screen after trimming
It is. The normal screen as shown in FIG.
A viewfinder screen almost similar to that shown in FIG.
And the parallax correction mark 56c at the time of trimming.
Is provided with a thin line and is short.
When it comes to being out of the way. In the case of trimming as shown in FIG.
The screen is different from the screen shown in FIG.
The visual field mask is small not only vertically but also horizontally
It has become similar to the normal screen
It is. However, if the screen size is reduced as it is,
The eyepiece zoom lens 57 as described above.
Use the to increase the viewfinder observation magnification to
See the same size as the visual field mask 55 that can be seen at
Is set to be able to. At this time, parallax correction at the time of trimming
The mark 56c has the same thickness as the normal screen as described above.
It can be seen in length and length. Also,
The parallax correction mark for normal screen 56a is
When hiding, you will be out of the field of view and will not be observed
It has become. The configuration shown in FIGS. 22 and 23
According to the normal screen, it is displayed out of the way
Can be panoramic or cropped
For short distances that can sometimes be observed with a thickness, length and size that are easy to see
Finder optical system with parallax correction mark
can do. In the above description, the parallax correction mark is
I drew or engraved on the lens or prism,
To display the parallax correction mark, use
A transmissive liquid crystal is placed on the image plane of the
Change the thickness and length of the line of the correction mark
Is also good. Also, change the color of the correction mark display to recognize
You may make it easy. In addition, if it is a liquid crystal display
Is the target of the AF that is normally displayed at the center of the normal screen.
Mark, etc. according to panorama and trimming
You can change the size and thickness.
No. FIGS. 24 and 25 show the structure of the photometric optical system.
FIG. In FIG. 24, the finder structural member 50
As shown in FIG. 3, the photometric light receiving element 72 is
It is pressed and held by the elastic arm 50g. This photometric light receiver
An infrared light cut filter for photometry is provided on the optical axis front side of the element 72.
73 is provided, and the photometric light-receiving element 72 emits visible light.
It is configured to measure a near light beam. The light receiving element 72 for photometry is located on the front side of the optical axis.
Is provided with a photometric opening 50f through which light is incident.
The photometry of the subject is performed by the photometric opening 50f.
To prevent unwanted light from entering from the side
You. The finder structural member 50 is, as shown in FIG.
Fixed to the camera body 8. The outer panel 7 is made of a transparent member as described above.
It is formed and adhered to the front cover 3Close contactEtc.
More firm. The exterior panel 7 includes a photometric light receiving element.
Inside the camera at the portion corresponding to the front of the optical axis of the
And has an integral portion 7f. Further, on the outside of the camera of the exterior panel 7, a shield is provided.
For lightThe paint film 7g is, for example, marked on the side in contact with the exterior panel 7.
The printed transparent sheet 7i is formed by in-mold molding.one
It is fixed by the body. The paint film 7g is provided on the lens portion 7f.
It is not provided in the part corresponding to the lens effective part,Inside
Part of the transparent member is in direct contact with the transparent sheet 7i.And photometry
Metering light that can be incident without blocking
Window 7a. The front cover 3 also has a lens effective portion.
Is provided with an opening 3c.
By using 3c as the aperture of the lens unit 7f, the lens
OfAperture diameterIs decided. As described above, the photometric lens is attached to the exterior panel 7.
The light beam from the subject
Photometry. Next, another example of the configuration shown in FIG.
Is shown in FIG. As shown, outside the exterior panel 7
Is printed with a light-shielding print 7h. Effectiveness of lens 7f
No light-shielding printing 7h is performed on the
The opening of the transparent member is exposed to form a photometric window 7a.
Other parts are almost the same as those in FIG. The structure as shown in FIGS.
By setting the lens for photometry as in the past,
Metering without removing the
The space from the photometric lens to the photometric lens can be omitted.
From the inner surface of the exterior member to the imaging distance from the
Camera can be downsized
You. Further, a lens surface is provided inside the exterior member.
Because of this, the lens surface is not easily scratched. In addition,
Since a light-shielding film is provided in areas other than the vicinity of the
Light can be cut off and accurate photometry can be performed. Soshi
The photometric lens is formed integrally with the exterior member.
For example, compared to the case where the camera
All have the advantage of high waterproof and dustproof performance. Note that, as shown in FIGS.
As another example of the configuration, the finder structure member 50 is used.
The attached photometric light receiving element 72 is attached to the exterior panel 7 or the front.
It is also possible to attach directly to the side cover 3
As a result, the photometric light-receiving element 72 is precisely aligned with the lens optical axis.
It is easy to assemble at a good mounting position. Further, as shown in FIGS.
As another example of a simple configuration, the photometric window 7a of the exterior panel 7
Cuts infrared light on the surface and transmits almost only visible light
In-mold molding or printing of characteristic coating film
By providing, the infrared light cut filter 73 for photometry is also unnecessary.
Turtles that have achieved further miniaturization and lower prices
La can be. In addition, the lens section
You may comprise using a Rennel lens, and in this case,
Further, the size of the camera can be reduced. According to the embodiment of the present invention, the eyepiece and the eye
While driving and switching the rimming field frame integrally,
The insertion position is determined individually with a simple configuration.
The viewfinder in conjunction with switching the screen size.
To provide a small camera that switches between the field frame and the observation magnification
Can be. In addition, the eyepiece zoom lens is placed in the finder optical path.
Can be inserted with high accuracy during trimming shooting.
A camera with good visibility and capable of observing the enlarged subject image
Mela can be provided. [0101] According to the present invention as described above,
Zooming can be performed in conjunction with a change in the size of the viewfinder.
To provide a small camera finder mechanism
Can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a camera showing one embodiment of the present invention. FIG. 2 is a front view of the camera of the embodiment. FIG. 3 is an exploded perspective view showing the finder unit, the exterior panel, and the rotating frame of the embodiment. FIG. 4 is an exploded perspective view showing a configuration of a finder optical system in the finder unit of the embodiment. FIG. 5 is an exploded perspective view showing a state in which the finder optical system of the embodiment is partially assembled. FIG. 6 shows the cam member in the telephoto state of the above embodiment and the first cam member.
FIG. 4 is a plan view showing an engaged state of a variable power lens and a second variable power lens. FIG. 7 shows the cam member and the first cam member in the wide-angle state of the embodiment.
FIG. 4 is a plan view showing an engaged state of a variable power lens and a second variable power lens. FIG. 8 is a sectional view showing a first example of a configuration for improving the position accuracy of the finder optical system having a zoom function according to the embodiment. FIG. 9 is a cross-sectional view showing a second example of the configuration for improving the position accuracy of the finder optical system having a zoom function according to the embodiment. FIG. 10 is a sectional view showing a third example of a configuration for improving the position accuracy of the finder optical system having a zoom function according to the embodiment. FIG. 11 is a sectional view showing a fourth example of a configuration for improving the position accuracy of the finder optical system having a zoom function according to the embodiment. FIG. 12 is a sectional view showing a fifth example of a configuration for improving the positional accuracy of the finder optical system having a zoom function according to the embodiment. FIG. 13 is a cross-sectional view showing a sixth example of the configuration for improving the position accuracy of the finder optical system having a zoom function according to the embodiment. FIG. 14 is a cross-sectional view showing a seventh example of a configuration for improving the position accuracy of the finder optical system having a zoom function according to the embodiment. FIG. 15 is a perspective view showing a configuration related to panorama switching in the finder unit of the embodiment, viewed from the rear side of the camera. FIG. 16 is a plan sectional view showing a case where the finder is in a panoramic state in the configuration relating to panorama switching of the finder unit of the embodiment. FIG. 17 is a plan sectional view showing a case where the finder is in a normal screen state in the configuration relating to panorama switching of the finder unit of the embodiment. FIG. 18 is a longitudinal sectional view showing a case where the finder is in a panoramic state in the configuration relating to panorama switching of the finder unit of the embodiment. FIG. 19 is a view showing the eyepiece variable power lens frame shown in FIG. 17 from the direction of arrow J and a sectional view of a field mask portion of the finder. FIG. 20 is a front view of the camera body in a normal state, showing the interlocking operation between the panoramic mechanism for regulating the aperture of the photographing screen and the eyepiece zoom lens of the finder unit in the embodiment. FIG. 21 is a partial front view of the camera body in a panoramic state, showing the interlocking operation between the panoramic mechanism for restricting the aperture of the shooting screen and the eyepiece zoom lens of the finder unit in the embodiment. FIG. 22 shows the result of observing the viewfinder of the above embodiment.
FIG. 4 is a diagram showing parallax correction marks in (A) a normal screen and (B) a panoramic screen. FIG. 23 shows the result of observing the viewfinder of the above embodiment.
FIG. 9 is a diagram showing another example of the parallax correction mark in (A) a normal screen and (B) a trimming screen. FIG. 24 is a sectional view showing a configuration of a photometric optical system of the camera according to the embodiment. FIG. 25 is a sectional view showing another example of the configuration of the photometric optical system of the camera according to the embodiment. [Description of Signs] 1 ... Camera 50 ... Finder structure member 50b ... Protrusion 51 ... Fixed objective lens 52 ... First zoom lens 53 ... Second zoom lens 54 ... First prism 56 ... Second prism 57 ... Eyepiece Magnifying lens 57a Abutment section 58 Fixed eyepiece 67 Eyepiece magnifying lens frame 67a Viewfinder panoramic field mask 70 Lens biasing spring

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 13/00-13/28

Claims (1)

(57) [Claims] [Claim 1] An image is captured in a first screen area and a second screen area.
Camera viewfinder with switchable shadow screen range
In this case , the first lens is inserted into the finder optical system,
Viewfinder optical in the first field of view corresponding to the screen range
By being evacuated from the system, it will be in the second screen area
In the corresponding second field of view, the field of view of the finder optical system
A field-of-view mask for panorama, etc. that switches the surroundings , and inserted / retracted into the optical path of the eyepiece optical system of the viewfinder optical system
To change the viewfinder magnification.
Between the insertion position and the retracted position.
The eyepiece so as to be relatively slidable along the sliding direction.
It supports and has a variable power lens and has the panorama
Ocular zoom lens with a field mask for
Frame and the viewfinder range corresponding to the range of the shooting screen that can be switched
Drive the eyepiece zoom lens frame so that
Moving means, and the eyepiece zoom lens frame disposed on the eyepiece zoom lens frame.
The eyepiece zoom lens supported slidably relative to
In the direction of insertion into the optical path of the eyepiece optical system of the viewfinder optical system
When the lens urging member for urging and the eyepiece zoom lens frame slide to the insertion position,
When the lens is biased in the insertion direction by the lens biasing member.
By contacting the eyepiece zoom lens, the eyepiece zoom
Biasing the eyepiece zoom lens against the lens frame
Sliding in the direction opposite to the above insertion direction against the urging force of the member
The eyepiece zoom lens in the specified insertion position.
Comprising a contact member to fit-decided, and sliding between a retracted position above zoom eyepiece lens frame and the insertion position
When moving, the eyepiece zoom lens is
When the eyepiece is not in contact with the contact member,
Moves integrally with the eyepiece zoom lens frame.
Camera viewfinder mechanism, characterized in that is.