JP3262916B2 - Camera with switchable shooting screen size - 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 whose photographing screen size can be switched.

[0002]

2. Description of the Related Art Conventionally, various cameras and switching mechanisms capable of switching a photographing screen size have been proposed. For example, Japanese Patent Application Laid-Open No. 3-238440 discloses an operating member provided on a camera exterior part. By operating the operation member, the switching member of the photographing screen size arranged near the aperture of the camera body in conjunction with the operation member advances and retracts into the aperture,
Thus, a technical means for switching the photographing screen size is disclosed.

[0003]

However, in the technical means disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 3-238440, the location of the operation member is limited, so that the operability is poor, and the photographing screen size switching is not performed. A connecting mechanism for linking the members to the operation members is required, which results in an increase in size and cost of the camera.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a camera having a simple configuration, a small size, and a switchable photographing screen size capable of reliably switching the photographing screen size. And

[0005]

In order to achieve the above-mentioned object, a camera capable of switching a photographing screen size according to the present invention changes a photographing screen size by covering a part of an aperture opening provided in a camera body. In the camera capable of switching the shooting screen size, the aperture opening
Is slidably supported in the vertical direction with respect to
A shield covering one of the upper and lower sides of the aperture opening.
The light position and the retreat position for retreating from the aperture opening
A first light blocking member that moves to
The light blocking position covering the other of the upper part and the lower part and the aperture
Second light shielding moving to a retreat position to retreat from the shutter opening
And the first and second light blocking members are retracted.
The first screen size when in the position
When the second light shielding member is at the above light shielding position, the second image is displayed.
Screen size defining light-blocking means for defining the screen size ;
Engages with the first light blocking member and rotates with the camera body
The first, which is freely provided and meshes with the rotation
A first rotating member to the light shielding member is moved vertically, the second
And the first rotating member
Are engaged with each other and are rotatably provided on the camera body,
The second light shielding member meshing with the rotation is vertically driven.
And the first rotating member via the first rotating member.
A second rotating member for vertically driving the light shielding member, said first及
And a rotation axis substantially perpendicular to the rotation axis of the second rotation member.
And an arm provided on the second rotating member.
Having a cam that comes into contact with said cam,
A rotation driving cam member for rotationally driving the member.
The features, also the said first and second light shielding member
A biasing means for biasing from the retracted position toward the light shielding position is provided.
When defining the second screen size,
The first light-blocking member and the second light-blocking member slide in a straight line.
Abut against each other in the direction biased by the biasing means in the direction
It is characterized by being positioned by performing

[0006]

[Operation] In the above configuration, the rotation of the rotation drive cam member is performed.
The second rotating member is rotated by the cam by the
Move the light blocking member downward and rotate the first rotating member
Then, the first light shielding member is moved upward, and the first and second light shielding members are moved.
Driving to the retracted position where the member is retracted from the aperture opening
By defining the first screen size,
The second rotating member is rotated by the cam by the rotation of the cam member.
To move the second light blocking member upward and
By rotating the rotating member, the first light shielding member is moved downward,
The first and second light shielding members cover a part of the aperture opening.
Defines second screen size by driving to light position
I do .

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing a main part of a camera according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a main part of the camera.

FIGS. 3 to 6 are plan views showing main gear trains in respective operation states of the main part of the camera. FIG. 3 shows a state when zooming operation is possible.
FIG. 5 shows the state when the film winding operation is possible, FIG.
FIG. 6 shows a state in which the film can be rewound, FIG.
Indicates a state when the shooting screen size switching operation is possible.

In the camera of the first embodiment, as shown in FIG. 2, a main body drive motor 201 is provided in a spool 217 as is known. In FIG. 1, for explanation,
The main body drive motor 201 and the spool 217 are shown separately. The main body drive motor 201 can rotate in the CW direction and the CCW direction. The sun gear 202 is attached to the main body drive motor 201 so as to coincide with the rotation center thereof.
3 is supported so as to always mesh with the sun gear 202. The carrier 204 is disposed at a position where the rotation center of the carrier 204 coincides with that of the main body drive motor 201, and supports the planetary gear 203 with a frictional force.

A stopper 205 is a fixed member that regulates the rotation angle of the carrier 204, and the switching plunger 206 includes a coil 206a and the plunger core 20.
The rotation of the carrier 204 is restricted by an actuator composed of a plunger 6b and a plunger spring 206c.

Normally, the coil 206a is not energized, and the plunger core 206b is urged by the plunger spring 206c so as to protrude, and holds the carrier 204 between itself and the stopper 205. .
On the other hand, when the coil 206a is energized, the plunger iron core 206b is attracted to the coil 206a, the holding state of the carrier 204 is released, and the carrier 204 is moved within the range regulated by the stopper 205.
It becomes rotatable by the driving force of 01.

When the power supply to the coil 206a is stopped when the carrier 204 rotates to the vicinity of the rotation limit by the stopper 205, the plunger iron core 206b protrudes due to the urging force of the plunger spring 206c.
4 between the carrier 2 and the stopper 205 again.
04 rotation is regulated.

By the above-described operation, the planetary gear 20
Reference numeral 3 selectively meshes with one of a first zoom gear 209 and a hoisting sun gear 208 which will be described later.

The carrier photo-interrupter 207 (hereinafter referred to as carrier PI 207)
4 is a photo-interrupter for detecting the position, and the winding sun gear 208 meshes with the planetary gear 203 when the main body drive motor 201 rotates in the CW direction and the carrier 204 rotates. ing.

The first zoom gear 209 meshes with the planetary gear 203 when the main body drive motor 201 rotates in the CCW direction and the carrier 204 rotates. Also, the second zoom gear 210,
The third zoom gear 225, the fourth zoom gear 226, and the fifth zoom gear 227 are connected to the first zoom gear 209.
It is designed to rotate following the rotation of. The second
The zoom gear 210 and the third zoom gear 225 are 2
The fourth zoom gear 22 includes a stepped spur gear.
The sixth and fifth zoom gears 227 are constituted by two-stage gears, one of which is a bevel gear, and change the direction of rotation. The other gear of the fifth zoom gear 227 is a spur gear, meshing with the gear 51a of the rotating frame 51,
The rotating frame 51 is rotated.

Zoom photo interrupter idle gear (hereinafter abbreviated as zoom PI idle gear) 211
Is a gear driven by the fourth zoom gear 226, and a zoom photo interrupter gear (hereinafter abbreviated as a zoom PI gear) 212 is driven by the zoom PI idle gear 211. A slit portion 212a is formed.

The zoom photo interrupter 213 (hereinafter, referred to as a zoom photo interrupter 213)
The zoom PI 213) reads a pulse signal by the rotation of the slit 212a of the zoom PI gear 212, and detects the rotation amount of the rotating frame 51.

The check member 214 is urged toward the first zoom gear 209 by a check spring 232, which is a compression spring, and has a claw 214a tapered toward the tip at its tip. ing. The check member 21
4 is a case where the planetary gear 203 is wound up and the sun gear 20 is wound.
8, the claw 214a is cut between the teeth of the first zoom gear 209, thereby preventing the rotating frame 51 from being accidentally rotated by an external force. . When the planetary gear 203 meshes with the first zoom gear 209, the carrier 204
Of the first zoom gear 2
09, the rotating frame 51 can freely rotate.

The hoisting planet gear 215 is connected and supported by a hoisting carrier 216 so as to always mesh with the hoisting sun gear 208. That is, the hoisting carrier 216 is disposed so that the center of rotation thereof coincides with that of the hoisting sun gear 208, and supports the hoisting planetary gear 215 with a frictional force.

As described above, the main body drive motor 201 is disposed inside the spool 217, and a gear 217a is formed on a lower outer peripheral surface. When the main body drive motor 201 is rotated in the CW direction, the winding carrier 216 is rotated toward the spool 217,
The hoisting planet gear 215 and the spool 217 mesh with each other and rotate. Further, on the upper outer peripheral surface of the spool 217, a claw 217b for engaging with a perforation hole of the film is formed so as to protrude therefrom.
The film is wound by rotating the film.

The locking lever 218 is swingable between the two ends so that one arm 218a engages with the plunger core 206b of the switching plunger 206 and the other arm 218b locks the carrier 204. When the plunger iron core 206b is attracted to the coil 206a, the carrier 204 is unlocked.

The panoramic sun gear 219 meshes with the hoisting planetary gear 215 when the main body drive motor 201 rotates in the CCW direction while the planetary gear 203 meshes with the hoisting sun gear 208. . The panoramic planetary gear 220 is supported so as to always mesh with the panoramic sun gear 219. The panorama carrier 221 is disposed at a position where the rotation center coincides with the panorama sun gear 219, supports the panorama planetary gear 220 with a frictional force, and becomes a rotation center of the panorama planetary gear 220, Further, a shaft 221a extending below the panoramic planetary gear 220 is formed.

The cam gear 222 is a gear for switching the photographing screen size. When the planetary gear 203 is engaged with the hoisting sun gear 208, when the main body drive motor 201 is rotated in the CCW direction, the hoisting is performed. The carrier 216 has the panoramic sun gear 219
The hoisting planet gear 215 meshes with the panoramic sun gear 219 to rotate it. In addition, the panorama carrier 221 is rotated by the rotation of the panorama sun gear 219, so that the cam gear 22 is rotated.
Rotating to the second side, the panoramic planetary gear 220 and the cam gear 222 mesh with each other and rotate.

Further, a second cam 222b for operating a screen size detection switch 245 for detecting the state of the two light shielding masks 242 and 243 is formed on the upper portion of the cam gear 222. Further above, a first cam 222a for moving the two light-shielding masks 242, 243 is formed.

The switching lever 223 has, at one end thereof, a panorama planetary gear 220 of the panorama carrier 221.
A groove 223a that engages with a shaft 221a that supports the switch lever 223 is formed, and a projection 223b is vertically provided at the other arm end of the switching lever 223. The projections 223b are provided on the rotating frame 5 with respect to the cams 51d formed on the rotating frame 51.
The first rotation makes contact.

The switching lever 223 is rotatably supported by a support shaft in the middle of the switching lever 223. The switching lever 223 is rotated at the other arm end by the rotation of the cam 51d of the rotary frame 51, and is engaged with one arm end. The panorama carrier 221 thus rotated is rotated. As a result, the panorama planet gear 220
Are engaged with the first rewind gear 224.

On the other hand, when the cam 51d of the rotating frame 51 and the projection 223b are located at a distance from each other, the switching lever 223 is driven by the panorama carrier 221.

The first rewind gear 224 and the second
Rewind gear 228, third rewind gear 229, fourth rewind gear 230, fifth rewind gear 231
Are driven by the rotation of the panorama planetary gear 220, respectively. The first rewind gear 2
Reference numeral 24 denotes a two-stage spur gear, and a fifth rewind gear 23.
Reference numeral 1 denotes an unillustrated spool which is disposed in a patrone in a state in which the center of rotation coincides with the center of rotation. The unillustrated fork 1 is provided for rotating the unillustrated spool shaft to rewind the film. .

FIGS. 7 to 17 are explanatory views showing the panorama switching mechanism of this embodiment.

FIG. 7 is a perspective view showing the entire panorama switching mechanism, and FIGS. 8 to 11 are plan views showing cam gears in the camera. FIG.
FIG. 13 is a main part front view showing a panorama switching mechanism in a state where a wide shooting screen size is selected in the camera. FIG. 13 is a main part front view showing a panorama switching mechanism in a state where a narrow shooting screen size is selected in the camera. FIG. Further, FIG. 14 is a side view of a main part showing a panorama switching mechanism in a state where a wide photographing screen size in the camera is selected, and FIG. 15 shows a panorama switching mechanism in a state where a narrow photographing screen size in the camera is selected. It is a principal part side view shown. FIG.
FIG. 17 is a side view of a main part viewed from a direction opposite to FIG. 14 showing a panorama switching mechanism in a state in which a wide shooting screen size in the camera is selected. FIG. FIG. 16 is a side view of a main part showing the panorama switching mechanism in the state shown in FIG.

As shown in FIG. 7, the first panoramic gear 2
Reference numeral 40 denotes a swing center 240d which is supported on a main plate (not shown) so as to be vertically swingable in the drawing. A cam gear 222 is provided below the first panoramic gear 240.
An arm 240a, which is a cam follower contacting the first cam 222a, is formed, and the rotation of the cam gear 222 causes the first panoramic gear 240 to swing about the swing center 240d as a fulcrum. ing. The first
The tip of one arm of the panoramic gear 240 is a partial gear 240
b, and a partial gear 240c is formed at the tip of the other arm, respectively.
2, meshes with the second panoramic gear 241.

As shown in FIG. 7, the second panoramic gear 241 is supported on a base plate (not shown) at a swing center 241d so as to be vertically swingable in the drawing, and a partial gear 241a is provided at the tip of one arm. There are formed, and the partial gear 240 c meshes in the first panorama gear 240, so as to swing in cooperation with the rotation of the first panoramic gear 240. Also, at the tip of the other arm, a partial gear 2
41b are formed and mesh with the upper light shielding mask 243.

The lower light-shielding mask 242 and the upper light-shielding mask 243 are both supported at their base ends by a fixed shaft 239 (not shown) so as to be movable in the vertical direction in FIG. The fixed shaft 239 is supported by a main plate (not shown). The lower light-shielding mask 242 is movable in the axial direction of the fixed shaft 239, and is moved by the movement.
Reference numeral 42a is adapted to enter or retreat into the photographing aperture opening 4c of the main body 4. The lower light-shielding mask 242 is moved by the first panoramic gear 2 meshing with a gear 242b formed on one side surface of the base end.
It is made to follow the swing of 40.

The upper light shielding mask 243 is supported together with the lower light shielding mask 242 so as to be movable in the axial direction by a fixed shaft 239 (not shown). The upper light shielding mask 243
The light-shielding portion 243a moves into or out of the photographing opening 4c of the main body by the movement of. The movement of the upper light-shielding mask 243 is performed by the swing of the second panoramic gear 241 meshing with the gear 243b formed on one side surface of the base end. A gear portion 243c is formed to protrude from the upper surface of the base end portion of the upper light-shielding mask 243, and meshes with a panorama switching gear 171 that transmits power to a finder portion.

The upper and lower light shielding masks 242,
A panoramic spring 244, which is an elastic member that elastically couples the light-shielding mask, is provided between base ends of the light-shielding mask 243. In this embodiment, the panoramic spring 244 urges the light-shielding masks 242 and 243 in a direction to approach each other.
The contact force with the cam gear 222 at a is generated.

The screen size detection switch 245 is fixed to a base plate (not shown), and the contact piece is a second piece of the cam gear 222.
Of the cam 222b. The rotation of the cam gear 222 causes the screen size detection switch 245 to rotate.
(Hereinafter, abbreviated as PN detection SW 245) is turned on / off.

The date holder 246 is fixed to the upper light shielding mask 243, and includes a date lens 248 and a light emitting LED.
The upper light-shielding mask 243 is integrally supported by the upper light-shielding mask 243. Further, light-shielding projections 246a and 246b are provided at the rear end thereof. When shooting with a larger screen size (standard screen size), the hole 4e of the main body is shielded by 246b when shooting, and exposure of the film with harmful light is performed. Is to be prevented. on the other hand,
At the time of photographing with a smaller screen size (panoramic screen size), 4d is shielded from light by 246a, and similarly, exposure of the film due to harmful light is prevented.

The light emitting LED 247 is supported by the date holder 246, and is a light emitting element for imprinting data on a film. The date lens 248 is supported by the date holder 246, and is a lens for forming an image of the light emitted by the light emitting LED 247 on a film. Further, a film photo reflector 249 (hereinafter abbreviated as film PR 249) is provided at a position facing the perforation hole of the film, reads the movement of the perforation hole, and generates and outputs a pulse signal. I have.

The main body 4 has a photographing opening 4c for performing exposure on the film 13, a hole 4d for imprinting a date when the screen size is in a standard state, and a panoramic state when the screen size is in a panoramic state. Sometimes has a hole 4e for imprinting a date.

According to the present embodiment, each of the zooming operation, the film winding operation, the film rewinding operation, and the photographing screen size switching operation can be performed by one motor. The operation will be described below.

First, the zooming operation will be described with reference to FIG.

FIG. 3 is a plan view showing the main gear train when the zooming operation is possible. As shown in FIG. 3, zooming is possible when the planetary gear 203 is engaged with the first zoom gear 209. At this time, the main body drive motor 201 is energized and rotated, so that the first zoom gear 209 to the fifth zoom gear 22 are rotated.
7 rotates to rotate the rotating frame 51 and zoom P
By rotating the I gear 212, the rotation amount of the rotating frame 51 is detected. Also, as shown in FIG. 1, a zoom encoder pattern sheet 76 is attached to the rotating frame 51, and a zoom photo reflector 139 (hereinafter, referred to as a position facing the zoom encoder pattern sheet 76).
Zoom PR 139). Thus, the reference rotation position of the rotation frame 51 is detected, and a fine rotation amount is detected based on the output from the zoom PI 213.

When the main body drive motor 201 rotates in the CW direction, the lens is moved from the retracted state to the wide angle state and zooms to the telephoto side. When the main body drive motor 201 rotates in the CCW direction, zooming is performed to the wide angle side. The collapsing operation of the lens frame is performed in the final area. The zoom encoder pattern sheet 76 is provided so that the output of the zoom PR 139 changes as follows. In other words, the level from the collapsed area to the position just before the wide end is the "L" level, the level from the wide end position to the position just before the tele end is "H" level, and the tele end is the "L" level.

Next, the film winding operation will be described with reference to FIG.

FIG. 4 is a plan view showing the main gear train when the film winding operation is possible. As shown in FIG. 4, the planetary gear 203 is
8 can be wound up. At this time, when the main body drive motor 201 is energized and rotated in the CW direction, the winding planet gear 215 meshes with the spool 217 to rotate the spool 217. The moving amount of the film 13 wound by the spool 217 is detected by the film PR249.

Next, the film rewinding operation will be described with reference to FIG.

FIG. 5 is a plan view showing the main gear train when the film rewinding operation is possible. As shown in FIG. 5, the planetary gear 203 is
8 and the panorama carrier 221 is rotated toward the first rewind gear 224 by the rotation of the rotating frame 51, and the panorama planetary gear 220 is engaged with the first rewind gear 224. In this case, rewinding becomes possible. In the present embodiment, when retracted, the cam 51d of the rotating frame 51 rotates the protrusion 223b of the switching lever 223 to enable rewinding. Therefore,
When the lens barrel is not in the retracted position, rewinding is impossible.
Rewinding is performed when the main body drive motor 201 rotates in the CCW direction.

During the rewinding, the switching lever 223 rotates counterclockwise due to the reaction force when the panorama planetary gear 220 and the first rewinding gear 224 mesh with each other. The end 51d 'of the cam 51d is a surface perpendicular to the optical axis so that the rotating frame 51 does not rotate.

Next, the photographing screen size switching operation will be described with reference to FIG.

FIG. 6 is a plan view showing the main gear train when the photographing screen size switching operation is possible. As shown in FIG. 6, the planetary gear 203 is
08 and the switching lever 223 is
When the user is free with respect to one cam 51d, the screen size can be switched. Therefore, when the lens frame is collapsed, the screen size cannot be switched.

When the screen size is to be changed when the planetary gear 203 is engaged with the first zoom gear 209, first, the planetary gear 20 is engaged.
3 needs to be meshed with the hoisting sun gear 208. For this purpose, first, the coil 206a is energized,
The carrier 204 is unlocked, and then the main body drive motor 201 is energized to rotate in the CW direction.
In this case, if the main body drive motor 201 is continuously energized, the rotation direction of the main body drive motor 201 for rotating the carrier and the rotation direction of the main body drive motor 201 for winding the film will be described. Are the same, there is a problem that the spool rotates and the film is wound up. For example, when zooming and screen size switching are performed alternately, the film is wound up little by little even though the photographer has not taken any picture.

In order to solve this problem, in the present embodiment, the carrier 204 is wound around the sun gear 20.
When the carrier 204 is rotated to the side 8, the drive voltage of the main body drive motor 201 is lowered, and the control is performed so that the carrier 204 is rotated with a weak force that cannot wind the film. Further, in order to minimize the energizing time to the main body drive motor 201, a carrier PI 207 is provided as a photo interrupter for detecting the position of the carrier 204.

The pulse output from the carrier PI 207 is changed immediately before the rotation of the carrier 204 toward the hoisting sun gear 208 is completed. The main body drive motor 20 is controlled by stopping the energization of the motor.
1 can minimize the energizing time. In this embodiment, the problem of winding the film when switching the screen size is solved by such a method.

Now, the main body drive motor 201 is CCW
When rotated in the direction, the panoramic planetary gear 220 meshes with the cam gear 222 to rotate the cam gear 222. Hereinafter, a procedure for switching the screen size by rotating the cam gear 222 will be described.

The screen size switching mechanism has a structure as shown in FIG. 7. The rotation of the cam gear 222 causes the first panoramic gear 240 to rotate, and the lower light shielding mask 2 to rotate.
42, the screen size is switched by moving the upper light-shielding mask 243 in parallel with a fixed axis 239 (not shown) showing only the center line and repeatedly entering and leaving the photographing opening 4c. Hereinafter, the relationship between the position of the cam gear 222 and the screen size will be described.

FIG. 8 is a plan view showing the positional relationship between the cam gear 222 and the arm 240a of the first panoramic gear 240 in the standard screen size in this embodiment. In the figure, reference numeral 222c indicates a range of the first cam 222a which is held at the standard screen size.
2d indicates a range held in the panoramic screen size.

In the state shown in FIG. 8, both the upper light-shielding mask 242 and the lower light-shielding mask 243 are retracted outside the photographing opening 4c to maintain the screen size in the standard state. At this time, the screen size detection switch 24
5 is held in the off state by the second cam 222b of the cam gear 222. Then, when the photographer operates an operation member (not shown) for photographing in a panoramic screen size, power supply to the main body drive motor 201 is started, and the cam gear 222 starts rotating.

FIG. 9 is a plan view showing the state at the moment when the arm 240a of the first panoramic gear 240 rotates toward the center of the cam gear 222.

At this time, the lower light-shielding mask 242 and the upper light-shielding mask 243 have both moved to the panorama screen size position, but the screen size detection switch 245 is still off.

FIG. 10 is a plan view showing a state where the cam gear 222 slightly rotates from the state shown in FIG.

At this time, the screen size detection switch 2
45 is turned on, and the screen size detection switch 24 is turned on.
Upon detecting the change in the state of No. 5, the power supply to the main body drive motor 201 is stopped, and the rotation of the cam gear 222 is stopped. Switching to the panoramic screen size is performed according to the procedure described above. In addition, by providing a time lag between the movement of the light-shielding mask and the change in the state of the screen size detection switch 245, the reliability of the switching of the light-shielding mask is guaranteed.

The movement of the upper light-shielding mask 243 to the panoramic screen size position causes the eyepiece zoom lens frame 1 to move.
67 moves, the field mask 167a and the eyepiece zoom lens 15 provided integrally with the 167 in the finder optical path.
7, the viewfinder changes to a form similar or similar to the screen size of the narrower view field, and the observation magnification changes, so that the photographer can recognize that the photographing mode has changed.

As for the dimensional accuracy of the screen size in the above-described operation, the screen size in the direction of the fixed axis 139 is the lower light-shielding mask 242 and the upper light-shielding mask 243.
Obtained by applying For this reason, an error due to a variation in the outer shape of another component is not affected, and an accurate screen size can be obtained. Therefore, at this time, the first cam 222a of the cam gear 222 and the arm 2 of the first panoramic gear 240
40a is not in contact.

Further, regarding the displacement of the screen with respect to the center of the screen at the time of the above-described operation, the first panoramic gear 240 and the second panoramic gear 2
Since 41 moves symmetrically with respect to the center of the screen just like a mirror, if the light shielding portions 242a and 243a of the lower light shielding mask 242 and the upper light shielding mask 243 are arranged symmetrically with respect to the screen center. These light-shielding portions move symmetrically with respect to the center of the screen as if they were reflected in a mirror.
Therefore, it is possible to obtain the center of the screen with high accuracy without using a structure for achieving center position accuracy.

Next, when the photographer operates an operation member (not shown) for switching to the standard screen size, the power supply to the main body drive motor 201 is started, and the cam gear 222 starts rotating.

FIG. 11 shows the first panoramic gear 240
Arm 240a of the first cam 2 of the cam gear 222
FIG. 9 is a plan view showing a state where the cam gear 222 is turned in a direction away from the center of the cam gear 222 by 22a.

At this time, the lower light-shielding mask 242 and the upper light-shielding mask 243 have moved to the standard screen size position, but the screen size detection switch 245 is still on. When the cam gear 222 rotates slightly from this state, the screen size detection switch 245 changes to the off state while the respective masks remain at the standard screen size position. When this state change is detected, the main drive motor 201 is energized. The rotation of the cam gear 222 is stopped. Accordingly, this returns to the state shown in FIG.

Switching to the standard screen size is executed according to the procedure as described above. In addition, by providing a time lag between the movement of the light-shielding mask and the change in the state of the screen size detection switch 245, the reliability of the switching of the light-shielding mask is ensured.

Further, by moving the upper light-shielding mask 243 to the standard screen size, the eyepiece zoom lens frame 167 moves, and the field-of-view mask portion 1 that has entered the finder optical path.
67a, since the variable power lens 157 is retracted from the optical path,
This allows the photographer to recognize that the photographing mode has changed.

Next, the data imprinting apparatus will be described. In this embodiment, data is imprinted while the film is being fed.

The light emitting LED 247 can emit one character data by one light emission, and emits light a plurality of times during film feeding to form character string data. The light emitted from the light-emitting LED 247 passes through the date lens 248 to form an image on a film, and prints data. The light emitting LED 247 and the date lens 248 are supported by a date holder 246, and the date holder 246 is fixed to the upper light shielding mask 243. For this reason, the date holder 246 is also moved by the movement of the upper light-shielding mask 243, so that the position where the data is imprinted is changed by switching the screen size, and the data is displayed on the photograph formed at the time of the panoramic screen size. Printed.

FIGS. 18 to 21 are explanatory diagrams showing the film feed amount detecting means in this embodiment.

The main body 4 has a patrone chamber 4a,
A spool chamber 4b is formed, and an exposure opening (aperture) 4c is formed between the cartridge chamber 4a and the spool chamber 4b. Also, holes 4d and 4e for imprinting data are formed, and data can be imprinted on the film through the holes.

The lens frame unit 2 includes the taking lens 14.
0 and is fixed to the main body 4. The taking lens 140 is a photographic lens that forms a subject image on the film 13, and is provided in the lens barrel unit 2. Further, the spool 217 is rotatably disposed at the center of the spool chamber 4b of the main body 4, and the film 1
3 is performed. Further, the patrone 12 is housed in the patrone chamber 4a of the main body 4, and a film 13 is wound inside. In this embodiment, a 35 mm roll film is used as the film 13.

As shown in FIGS. 20 and 21, the roller 260 is formed of a columnar portion 260a that comes into contact with the film 13, and a polygonal column portion 260b having each surface formed by a uniform reflecting surface. In addition, a shaft (not shown) passes through the center,
60 is rotatably supported. The shaft (not shown) is fixed to the main body 4, and the roller 260
3 is driven to rotate.

The data imprint timing photo reflector 261 (hereinafter abbreviated as data PR 261) is a polygonal column 260 b formed by the reflection surface of the roller 260.
Is disposed at a position opposite to. And the roller 2
When the reflection surface of the polygonal column 260b and the data PR 261 are directed in parallel by the rotation of 60, the data PR
261 is reflected by the reflection surface and returns to the data PR 261 again. As a result, the data PR
An output pulse from the H.261 is generated. The leaf spring 262 is fixed to the rear lid 25,
It is in elastic contact with the 60 cylindrical portions 260a. Also,
The pressure plate 263 is attached to the rear lid 25 via a pressure plate spring 264 to prevent the film 13 from floating and enhance the flatness of the film 13. The pressure plate spring 264
Is attached to the rear lid 25 by urging means for elastically urging the pressure plate 263 toward the main body 4.

The light-emitting LED 248 is a light-emitting element having seven segments for imprinting data, and can express one character of data by one light emission. The light-emitting LED 248 is supported by the date holder 246. . Also,
The date lens 247 is a lens for forming a character on the film 13 by emitting light from the light emitting LED 248, and is also supported by the date holder 246.

The date holder 246 supports the light emitting LED 248 and the date lens 247 as described above, and is fixed to the upper light shielding mask 242.
Further, the center of the hole 4d or 4e of the main body 4 and the light emission L
The ED 248 and the date lens 247 are vertically moved to a position where the centers thereof are coaxial.

In FIG. 18, reference numeral 11 denotes a main capacitor for a strobe, and reference numeral 10 denotes two power batteries. The film PR249 is a film 13
The number of perforations passing by the output pulse signal of the photoreflector 249 is counted, and the film is fed one frame. Further, reference numeral 21 denotes a front cover serving as an exterior part of the camera, and reference numeral 24 denotes a rear cover, which supports the back cover 25 rotatably.

The back cover 25 has a hinge at one end, and is supported by the rear cover 24 about the hinge as a center of rotation, and can be opened and closed. The leaf spring 262 and the pressure leaf spring 264 are attached. The back cover shaft 26 is a shaft that rotatably supports the back cover 25 and the rear cover 24. Reference numeral 27 denotes a side cover serving as an exterior part of the camera.
Reference numerals 7 and 38 denote operation buttons, and reference numeral 40 denotes a finder window.

Next, the operation of the roller 260 will be described.

As shown in FIG. 18, when the spool 217 is rotated by the rotation of the main body drive motor 201 and the film 13 is wound, the roller 260 is driven to rotate by the film 13. In order to improve the followability of the movement of the roller 260 and the film 13 during the rotation of the roller 260, it is necessary to increase the pressure contact force between the roller 260 and the film 13 to some extent. For this purpose, the leaf spring 262 elastically pressed against the roller 260 is attached to the back cover 25 as described above. This leaf spring 26
Since 2 is attached to the back cover 25, when the back cover 25 is opened, the pressure contact between the roller 260 and the leaf spring 262 is released. Here, when the patrone 12 is loaded and the back lid 25 is closed by aligning the leading end of the film 13 with an automatic loading index (not shown), the film 13 is sandwiched between the roller 260 and the leaf spring 262, and the elasticity of the leaf spring 262 Roller 26 by force
Contacted with 0.

The position of the roller 260 in the film advancing direction is in the vicinity of the entrance of the spool chamber 4b of the main body 4 and in a direction substantially parallel to the exposure opening 4c for the film 13 to be wound around the spool 217. To spool 217
By arranging the film 13 at a position that changes the direction, the force with which the film 13 contacts the roller 260 can be further increased.

In this embodiment, the roller 26
0 follows the movement of the film 13.

Next, the arrangement position of the roller 260 in the direction perpendicular to the film advancing direction will be described.

In this embodiment, the arrangement position of the film contact portion 260a of the roller 260 is considered.
That is, if the film contact portion 260a is disposed at a position where it contacts the photographing screen portion of the film 13, the film may be damaged, and if it is disposed so as to contact the perforation hole, the film of the roller 260 13
In this embodiment,
The film contact portion 260a of the roller 260 is
The third perforation hole is disposed at a position in contact with the outer edge. FIG. 20 shows an example in which the roller 260 is disposed at an optimum position.

By the rotation of the roller 260, a pulse signal is generated in the data PR261, and by counting the number of pulses, the film feed amount can be calculated. For example, if the diameter of the roller 260 is set to be equal to the winding amount of one frame of the film when the roller 260 rotates ten times and the polygonal column part 260b is a regular hexagonal column, the number of output pulses per frame is 10 (rotation) x 6 (prism) = 60 (pulse). On the other hand, in the film feed detection system in which the perforation in the film 13 is directly read by a known photo reflector, one frame of the film is 8 perforations, so that eight pulses are output. Therefore, it is possible to more finely detect the film feeding amount by using the roller.

Further, in recent years, photographs in which the date and the like are imprinted in the prints of the photographs have become widespread. However, if the camera is equipped with a film feeding and detecting device as in the present embodiment, such data is copied. The bunching device can be realized with a simple configuration.

The data imprinting apparatus performs the imprinting of the data during the feeding of the film.
As shown in FIGS. 18 and 19, the LED 248 and the date lens 247 that emit light are supported by the date holder 246, and the date holder 246 is positioned with respect to the main body 4. A hole 4 d for imprinting data is formed in the main body 4, and the light emitted by the light-emitting LED 248 passes through the date lens 247 so that the film 1 can be used.
3, and the data is imprinted.

The light emitting LED 248 can expose data of one character per light emission. Therefore, when printing data, the light emitting LED 248 is used when the film 13 is fed and passes over the hole 4d of the main body 4.
Are sequentially emitted the required number of times, and data is imprinted.

The feeding speed of the film 13 is not always constant due to a change in the amount of pull-out force from the patrone 12, a variation in the mechanical accuracy of a winding gear train or a winding motor (not shown), abrasion, and the like. are doing. As a result, if the light emitting LED 248 is always lit at predetermined time intervals to perform data imprinting without detecting the feeding speed of the film 13, the character spacing of the character string imprinted on the film 13 is changed. Since the characters become wider or narrower or characters overlap, the feeding speed must be detected with high accuracy.

In this embodiment, the feeding speed is detected by measuring the interval of the output pulse signal from the data PR261. Here, in the known film feed detection system for directly reading the perforation holes, the output per frame is 8 pulses, so the resolution per frame is 8. On the other hand, if the roller described above is used, 60
Since a pulse output signal is generated, the resolution per frame is 60, and the feed detecting device using the roller can detect the feeding speed finer, and the character spacing at the time of imprinting data can be correctly aligned. The light emission interval can be controlled.

The polygonal column 260 of the roller 260
b need not be hexagonal as in the illustrated roller,
An arbitrary polygonal prism may be used in consideration of the character spacing and the like in imprinting data. Further, a cylinder having a reflective surface and a non-reflective surface alternately painted such as silver and black may be used. In this embodiment, since the data is used for the data imprinting function, the resolution is required to be fine. Therefore, the polygonal column 260b is a polygon having many sides.

FIGS. 22 and 23 show the difference in character spacing depending on the density of the resolution.

FIG. 22 shows a case where the resolution is high and the data PR
An example is shown in which one character is printed every time there is one output pulse signal from the H.261. FIG. 23 shows an example in which the resolution is coarse and four characters are printed every time there is one output pulse signal from the data PR261.

In the example shown in FIG. 22, when one output pulse signal from data PR261 is generated, data is printed for one character. Even if the feeding speed of the film changes, the generation interval of the output pulse signal from the data PR 261 changes accordingly, so that the character interval of the data imprinted character string becomes constant.

In the example shown in FIG. 23, data PR2
Since the change of the feeding speed between the two output pulse signals from the output pulse signal 61 cannot be detected, the control means controls the feeding speed assuming that the feeding speed is constant. As a result, the character spacing of the character string varies. Would. The smaller the number of characters to be imprinted for each output pulse signal from the data PR261, the smaller the variation in character spacing can be. The greater the number of characters to be imprinted, the greater the variation in character spacing.

In this embodiment, one frame advance of the film is detected by detecting the movement of the perforation by the film PR.
249, the cumulative error of the film feed amount that increases as the number of shots increases does not occur, and the date is imprinted using a method of reading the rotation of the roller 260 with high resolution. A stable camera can be realized.

Next, a modified example of the film feed amount detecting mechanism in the above embodiment will be described.

If the diameter of the roller 260 is manufactured with high precision, there is almost no error in feeding one frame of the film.
The film may be advanced by one frame only by one. In this case, since the film PR249 can be eliminated, a smaller camera can be realized (see FIG. 35). Further, in the case of a camera without a data imprinting function, the polygon part 260b of the roller 260 may be a polygon having a small number of sides, since the resolution may be coarse.

FIG. 24 is a block diagram showing a configuration of an electric circuit in the camera of this embodiment.

The bipolar IC 402 has a zoom PI 21
3, pulse signals are input from the zoom PR 139, the carrier PI 207, the film PR 249, and the data PR 261. The pulse signals are shaped and output to the main CPU 401. Further, based on each actuator drive signal from the main CPU 401, the shutter plunger drive circuit 49
1, the shutter plunger 99, the main body driving motor 201, and the switching plunger 206 are driven by a main body driving motor driving circuit 492 and a switching plunger driving circuit 493.

The main CPU 401 controls the driving of the entire camera, and includes a release switch (SW) 318 and a zoom tele switch (S) which are manual operation switches.
W) 319, a zoom wide switch (SW) 320, a panorama changeover switch (SW) 321, a forced rewind switch (SW) 322, a data imprint mode changeover switch (SW) 333, and a screen size detection switch. (SW) 245 state is detected. Also,
An operation signal is output to the bipolar IC 402, the date CPU 403, and the like based on the input signals. Further, the state of the power switch (SW) 317 is detected, and ON / OFF of the power of the entire camera is controlled.

The date CPU 403 determines the date, year, month, date,
The hour / minute data is always calculated.
The light emitting LED 2 based on the imprint signal from
47 is caused to emit light, and the data is printed on the film 13.

The shutter plunger 99 is driven by a shutter plunger drive circuit 491 so that the shutter opens when a voltage is applied and a current flows, and the shutter closes when the current is turned off.

Next, each operation of this embodiment will be described with reference to FIGS.
This will be described with reference to the flowchart shown in FIG.

FIG. 25 is a flow chart showing the operation of extending the lens barrel from the collapsed state to the wide end.

When the power switch 317 is switched from OFF to ON, the operation of extending to the wide end is started (step S1). First, it is determined whether the planetary gear 203 is connected to the lens frame driving side, that is, it is determined whether the WZ flag is 1 or not (step S2). Is executed (step S3). Thereafter, it is determined whether or not the wide end flag is 1 (step S).
4) If 1, return to the main routine (step S11). If the flag is not 1, the main body drive motor 201 is rotated in the CW direction until the zoom PR 139 becomes the "H" level (steps S5 and S6), and the motor is extended to the wide end. Then, after the main body drive motor 201 is turned off (step S7), the wide end flag is changed from 0 to 1 (step S8), and the retracted flag is changed from 1 to 0 (step S9). And zoom P
The counter of I213 is reset (step S1
0), returning to the main routine (step S1)
1).

FIG. 26 is a flowchart showing the operation when zooming to the tele side.

The zoom tele switch (SW) 319 is turned on.
When the state is reached, the telezooming operation is started (step S101). This telezooming operation is performed in accordance with FIG.
Similarly to the feeding operation shown in FIG. 5, zooming is performed to the telephoto side after the gear train is surely switched to the lens frame driving side, and when in the telephoto end state, the zooming ends there. Less than,
Details will be described.

First, it is determined whether or not the planetary gear 203 is connected to the lens frame driving side, that is, whether or not the WZ flag is 1 (step S102). A subroutine (W to Z) for switching to the frame drive side is executed (step S10)
3). Thereafter, it is determined whether or not the telephoto end flag is 1 (step S104), and if it is 1, the process returns to the main routine (step S112). If the flag is not 1, the main body drive motor 201 is rotated in the CW direction (step S105), the zoom PI 213 is monitored (step S106), the wide end flag is changed from 1 to 0 (step S107), and the zoom PR 139 is set. Is "H" level or not (step S108). And
Until the zoom PR 139 is at the “H” level and the zoom tele switch (SW) 319 is turned off (step S109), the process returns to step S105 to rotate the main body drive motor 201.

When the zoom tele switch (SW) 319 is turned off in step S109, and when the zoom PR 139 is not at the "H" level in step S108, the tele end flag is changed from 0 to 1 (step S109).
110), and turns off the main body drive motor 201 (step S
111), and returns to the main routine (step S
112).

FIG. 27 is a flowchart showing the operation when zooming to the wide side.

The zoom wide switch (SW) 320 is set to O
In the N state, the wide zooming operation is started (step S201). This zooming operation is performed according to FIG.
When the gear train is switched to the lens frame driving side without fail, zooming is performed to the wide side and the output of the zoom PI is monitored in the wide end state to terminate the zooming in the same manner as in the feeding operation shown in FIG. Hereinafter, the details will be described.

First, it is determined whether or not the planetary gear 203 is connected to the lens frame driving side, that is, whether or not the WZ flag is 1 (step S202). A subroutine (W to Z) for switching to the frame driving side is executed (step S20)
3). Thereafter, it is determined whether or not the wide end flag is 1 (step S204), and if it is 1, the process returns to the main routine (step S212). If the flag is not 1, the main body drive motor 201 is rotated in the CCW direction (step S205), the zoom PI 213 is monitored (step S206), the telephoto end flag is changed from 1 to 0 (step S207), and the zoom PI 213 is set. It is determined whether or not the end is the wide end based on the count number (step S2).
08). When the zoom end is not at the wide end from the count number of the zoom PI 213 and the zoom wide switch (S
W) Until 320 is turned off (step S209), the process returns to step S205, and the main body drive motor 201 is rotated.

If the zoom wide switch (SW) 320 is turned off in step S209, or if the zoom end is wider than the count of the zoom PI 213 in step S208, the wide end flag is set from 0 to 1.
(Step S210), the main body drive motor 201 is turned off (step S211), and the process returns to the main routine (step S212).

FIG. 28 is a flowchart showing the operation when the lens frame is driven from the shooting area to the collapsed state.

When the power switch (SW) 317 is turned on from ON to O
When the mode is switched to the FF, the collapsing operation is started (step S301). Further, when the film ends during a film winding operation described later and automatic rewinding is started (see FIG. 29), a forced rewinding switch (SW) 3
The retracting operation is also performed in the rewinding operation (FIG. 30) when 22 is turned on.

In the collapsing operation, the collapsing operation is performed after the gear train is reliably switched to the lens frame driving side in the same manner as the feeding operation shown in FIG. 25, and the collapsing operation is completed when the output of the zoom PI does not change. And the collapsing operation ends. Hereinafter, the details will be described.

First, it is determined whether or not the planetary gear 203 is connected to the lens frame driving side, that is, whether or not the WZ flag is 1 (step S302). A subroutine (W to Z) for switching to the frame driving side is executed (step S30)
3). Thereafter, it is determined whether or not the retracted flag is 1 (step S304), and if it is 1, the process returns to the main routine (step S311). If the flag is not 1, the main body drive motor 201 is rotated in the CCW direction until there is an output from the zoom PI 213 (step S30).
5, step S306), and move to the retracted position. Thereafter, the main body drive motor 201 is turned off (step S3).
07), the collapsing flag is changed from 0 to 1 (step S30).
8) Then, the tele end flag is changed from 1 to 0 (step S309). Then, the wide end flag is changed from 1 to 0 (step S310), and the process returns to the main routine (step S311).

FIG. 29 is a flowchart showing the operation of winding one frame of film.

The shutter plunger 99 is operated by the ON operation of the release switch (SW) 318, and after the film exposure operation is completed, the winding operation is started (step S401). First, first planetary gear 20
3 is connected to the film drive side, that is, whether the WZ flag is 0 or not (step S40).
2) If not connected, a subroutine (Z to W) for switching the carrier 204 to the film drive side is executed (step S403), and then the winding operation is started.

Further, when it is determined that the mode is the data imprinting mode based on the state of the data imprinting mode changeover switch (SW) 323, the data imprinting operation is executed during the film winding (steps S404 to S4).
06). In addition, the film winding operation is performed on the film PR2.
The output of 49 is monitored, and the process is terminated when eight perforations of the film have passed or when the winding up to the last end of the film has been completed and a predetermined time set by the winding timer has elapsed (steps S407 to S422).

FIG. 30 is a flowchart showing the film rewinding operation.

The rewinding operation is performed when the film is wound up to the final end during the winding operation shown in FIG. 29 and when the forced rewinding switch (SW) 322 is turned off.
The process is started when N is reached (step S501).

In this rewinding operation, the panorama planetary gear 220 is engaged with the first rewinding gear 224 by first bringing the lens frame into the retracted state, and then the subroutine (Z to) for switching the carrier 204 to the film drive side is performed. W)
(Steps S502 to S50)
7) Then, a rewind operation is performed.

That is, until the output from the film PR 249 is no longer detected, the main body drive motor 201 is turned on by CCW.
(Step S508, Step S50)
9), T1 second is set in the timer (step S510),
The main body drive motor 201 is turned off (step S51).
1). Thereafter, the film frame counter is reset (step S512), and the process returns to the main routine (step S513).

FIG. 31 is a flowchart showing an operation for switching the photographing screen between the normal size and the panorama size (hereinafter, referred to as a panorama switching operation).

This panorama switching operation is started when the state of the panorama switch (SW) 321 changes (step S601). This switching operation first confirms or executes that the lens frame has been extended to the photographable area, and then switches the carrier 204 to the film driving side (steps S602 to S606 and step S611). Then, the PN detection switch (SW) 2
The screen size is switched by monitoring the change in the state of step 45 (steps S607 to S607).
615). Note that the timer T2 in step S614
In seconds, the PN detection switch (SW) 245 is turned from ON to OF
After switching to F, the timer rotates the cam gear 222 to ensure that the screen size is reliably switched to the normal size.

FIG. 32 is a flowchart showing an operation of rotating the carrier 204 and switching the planetary gear 203 from the film driving side to the lens frame driving side, and a subroutine W to Z (step S701).

First, the switching plunger 206 is turned on (step S702), and the main body drive motor 201 is rotated in the CW direction until the zoom PI 213 outputs (steps S703 and S704). Thereafter, the main body drive motor 201 is turned off (step S705), the switching plunger 206 is turned off (step S706), the WZ flag is changed from 0 to 1 (step S707), and the process returns (step S708).

FIG. 33 is a flowchart showing the operation of rotating the carrier 204 to switch the planetary gear 203 from the lens frame driving side to the film driving side, and the subroutine Z to W (step S801).

First, the switching plunger 206 is turned on (step S802). Here, if the driving force of the main body drive motor 201 at the time of switching is large, the spool 217 rotates at the time of completion of switching, and the film 13 is wound up.
The main body drive motor is operated at a predetermined low voltage at which the film 13 cannot be wound (step S8).
03). This is because a drive voltage setting signal is output from the main CPU 401 to the bipolar IC 402, and the bipolar IC 402 and the shutter plunger drive circuit 491
Performs the above operation. The switching operation is completed by monitoring that the output of carrier PI 207 is at the "L" level (step S804) to step S804.
808).

FIG. 34 is a flowchart showing the data imprinting operation.

When this data imprinting subroutine is started (step S901), first, data PR26
The output of the film PR 249 and the output of the data PR 261 are monitored until the output of No. 1 changes (step S 902-
In step S904, after the output of the data PR261 has changed, the first digit of the data is printed on a film (step S905). Thereafter, the outputs of the film PR249 and the data PR261 are monitored again until the output of the data PR261 changes (steps S906 to S906).
Step S908), after the output of the data PR261 changes, the second digit of the data is printed on the film (Step S909), and these series of operations are repeated until the last digit of the data is printed (Step S910-Step S910). S913).

As described above, the data is sequentially imprinted on the film, and the data imprinting subroutine is terminated (step S914).

FIGS. 36 to 39 are explanatory views showing the light-shielding structure of the lens frame unit, the main body opening and the light-shielding mask.

The main body 4 is provided with two rows of continuous light-blocking ribs 4g, which form a light-blocking structure with the lens frame unit 2, at the upper and lower portions of the photographing opening 4c and at the side edges on the patrone chamber side. A light-shielding groove 4f that forms a light-shielding structure with the light-shielding masks 242 and 243 is formed at a side edge of the photographing opening 4c on the spool chamber side.

On the other hand, a light-shielding rib 2b which forms a light-shielding structure with the main body 4 is provided at an end of the lens frame unit 2 opposite to the light-shielding rib 4g of the photographing opening 4c. A light-shielding mask 24 is provided at an end of the lens barrel unit 2 facing the light-shielding groove 4f of the photographing opening 4c.
A light-shielding groove 2a forming a light-shielding structure with the light-shielding grooves 2 and 243 is formed.

The lower light-shielding mask 242 is located between the main body 4 and the lens frame unit 2, and is moved in parallel by the above-mentioned driving mechanism. Further, a part of the photographing opening 4c is shielded by the light-shielding portion 242a. Further, light shielding ribs 242d and 242e are provided, and have a shape corresponding to the light shielding groove 4f and the light shielding groove 2a.

The upper light-shielding mask 243 is located between the main body 4 and the lens frame unit 2 and is moved in parallel by the above-mentioned driving mechanism. Further, a part of the photographing opening 4c is shielded by the light-shielding portion 243a. When the lower light-shielding mask 242 covers the photographing opening 4c, the upper light-shielding mask 243 also covers the photographing opening 4c. When the lower light shielding mask 242 is retracted from the photographing opening 4c, the upper light shielding mask 243 is also moved to the photographing opening 4c.
c. Furthermore, the light shielding rib 2
43d and 243e are provided, and the light shielding groove 4f,
It has a shape corresponding to the light shielding groove 2a.

The light-shielding structure between the main body 4 and the lens frame unit 2 shown by hatching in FIGS.
5 shows a light-shielding structure portion range constituted by g and the light-shielding rib 2b.

Next, the operation of the light shielding structure of the lens frame unit, the opening of the main body and the light shielding mask will be described.

As shown in FIGS. 36 and 37, the main body 4 and the lens frame unit 2 are engaged with each other by a light-shielding structure composed of light-shielding ribs 4g and 2b, and are mainly provided in a viewfinder provided on the exterior. Although the harmful light L that enters the camera through holes such as windows and strobe windows is prevented from entering the photographing opening 4c, in the case of a camera whose screen size can be switched, the light shielding member is driven from the outside. The body 4 and the frame unit 2
There is a portion where the light-shielding structure cannot be formed. Referring to FIG. 38, the right end face remains as a part that cannot be formed into a light-shielding structure, and there is a risk that harmful light L may enter from this part and deteriorate image quality.

In this embodiment, in order to prevent the harmful light L from entering, as shown in FIG.
The harmful light L is prevented from penetrating by making the joint between the main body 4 and the lens barrel unit 2 into a light-shielding structure.
It is now possible to obtain high quality photos.

In addition, the lower and upper light shielding masks 24 are provided.
Reference numerals 2 and 243 move to switch the photographing screen size, as shown in FIGS. 38 and 39, so as to cover a part of the photographing opening 4c. At this time, the two light-shielding masks 24 are arranged so that harmful light L from a direction orthogonal to the moving direction of the light-shielding masks 242 and 243 does not enter.
2 and 243, the light-shielding ribs 2 face each other.
42d, 242e, 243d and 243e are extended.

These light shielding ribs 242d, 242e, 2
43d and 243e, the respective light shielding ribs overlap in the moving direction of the light shielding masks 242 and 243 even when a wide screen size is selected as shown in FIG.
Light is prevented from entering from a direction orthogonal to the moving direction of the light-shielding mask.

Next, a modified example of the light shielding structure will be described.

FIGS. 40 to 42 are explanatory views showing modified examples of the light shielding structure.

In the first modification, as shown in FIG. 40, two light-shielding grooves 242f are provided in the lower light-shielding mask 242,
h, a light-shielding rib 2c in the lens barrel unit 2 is provided to form a light-shielding structure. In the first modified example, the shape portion protruding in the moving direction of the light shielding mask 242 corresponding to the light shielding ribs 242d and 242e in the above embodiment is an H-shape including the reference numeral 242f and protruding in the moving direction of the light shielding mask 242. I have. Although not shown, the light-shielding structure between the upper light-shielding mask 243 and the main body 4 and the lens frame unit 2 is the same.

In the second modified example, as shown in FIG. 41, the light shielding rib 242e and the light shielding groove
And the light-shielding structure constituted by the light-shielding rib 243e and the light-shielding groove 4f are both eliminated.

Further, in the third modification, as shown in FIG. 42, the light shielding rib 242d and the light shielding groove 2
a, and a light-shielding rib 243d
The light-shielding structure constituted by the light-shielding groove 2a is eliminated.

It should be noted that these modifications may be adopted in combination with the light-shielding structure of the above-described embodiment in consideration of the entrance path of the harmful light L and the relationship in space, or may be employed in combination. No problem.

As described above, according to the present embodiment, the photographing screen size is switched by moving the screen size switching member by rotating the cam gear. Therefore, the photographing screen size is reduced particularly in the lateral direction, and is suitable for electric switching. A camera can be provided.

[0156]

As described above, according to the present invention, it is possible to provide a camera having a simple configuration, a small size, and a switchable photographing screen size capable of reliably switching the photographing screen size.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a main part of a camera capable of switching a photographing screen size according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of the camera of the embodiment.

FIG. 3 is a plan view showing a main gear train when a zooming operation is possible in the camera of the embodiment.

FIG. 4 is a plan view showing a main gear train when a film winding operation is possible in the camera of the embodiment.

FIG. 5 is a plan view showing a main gear train when a film rewinding operation is possible in the camera of the embodiment.

FIG. 6 is a plan view showing a main gear train when a photographing screen size switching operation is possible in the camera of the embodiment.

FIG. 7 is a perspective view showing the entire panorama switching mechanism in the camera of the embodiment.

FIG. 8 shows the cam gear 222 and the first panoramic gear 2 in the standard screen size in the camera of the embodiment.
FIG. 4 is a plan view showing a positional relationship between a forty and an arm 240a.

FIG. 9 is a plan view showing a state at the moment when the arm 240a of the first panoramic gear 240 rotates toward the center of the cam gear 222 in the camera of the embodiment.

FIG. 10 is a plan view showing a state in which the cam gear 222 slightly rotates from the state shown in FIG. 9 in the camera of the embodiment.

11 is a perspective view of the camera of the above embodiment, in which the arm 240a of the first panoramic gear 240 is connected to the first of the cam gear 222. FIG.
4 is a plan view showing a state where the cam gear 222a is turned in a direction away from the center of the cam gear 222. FIG.

FIG. 12 is a front view of a principal part showing a panorama switching mechanism in a state where a wide photographing screen size is selected in the camera of the embodiment.

FIG. 13 is a front view of an essential part showing a panorama switching mechanism in a state where a narrow photographing screen size is selected in the camera of the embodiment.

FIG. 14 is a side view of a principal part showing a panorama switching mechanism in a state where a wide photographing screen size is selected in the camera of the embodiment.

FIG. 15 is a side view of a principal part showing a panorama switching mechanism in a state where a narrow photographing screen size is selected in the camera of the embodiment.

FIG. 16 is a side view of a main part of the camera of the above embodiment, showing a panorama switching mechanism in a state where a wide shooting screen size is selected, viewed from a direction opposite to FIG. 14;

FIG. 17 is a side view of a main part of the camera of the embodiment, showing a panorama switching mechanism in a state where a narrow photographing screen size is selected, viewed from a direction opposite to FIG.

FIG. 18 is a sectional view showing a main part of the camera according to the embodiment.

FIG. 19 is an enlarged sectional view of a main part near a roller 260 in the camera of the embodiment.

FIG. 20 is a rear view of the camera according to the embodiment, showing the back cover in an open state.

FIG. 21 is an enlarged perspective view of a roller 260 in the camera of the embodiment.

FIG. 22 is a diagram showing a timing chart for explaining data imprinting and an example of imprinted characters when the detection resolution is precise in the camera of the embodiment.

FIG. 23 is a diagram showing a timing chart for explaining data imprinting and an example of imprinted characters when the detection resolution is coarse in the camera of the embodiment.

FIG. 24 is a block diagram showing a configuration of an electric circuit in the camera of the embodiment.

FIG. 25 is a flowchart showing the operation of the camera according to the embodiment to extend the lens barrel from the collapsed state to the wide end.

FIG. 26 is a flowchart showing an operation when zooming to the tele side in the camera of the embodiment.

FIG. 27 is a flowchart showing an operation when zooming to the wide side in the camera of the embodiment.

FIG. 28 is a flowchart showing an operation of the camera of the embodiment when the mirror frame is driven from the shooting area to the collapsed state.

FIG. 29 shows film 1 in the camera of the above embodiment.
It is a flowchart which shows the operation | movement of a frame winding.

FIG. 30 is a flowchart showing a film rewinding operation in the camera of the embodiment.

FIG. 31 is a flowchart showing an operation of switching a shooting screen between a normal size and a panorama size in the camera of the embodiment.

FIG. 32 shows a carrier 20 in the camera of the above embodiment.
4 to rotate the planetary gear 203 from the film driving side to the lens frame driving side, a subroutine W to
6 is a flowchart showing Z.

FIG. 33 shows the carrier 20 in the camera of the above embodiment.
4 to rotate the planetary gear 203 from the lens frame drive side to the film drive side, subroutine Z to
5 is a flowchart showing W.

FIG. 34 is a flowchart showing a data imprinting operation in the camera of the embodiment.

FIG. 35 is a rear view showing a modification of the film feeding amount detection mechanism.

FIG. 36 is a cross-sectional view near the center of the camera, showing a light-shielding structure of the lens frame unit, the main body opening, and the light-shielding mask in the embodiment.

FIG. 37 is a vertical cross-sectional view near the center of the camera, showing a light-shielding structure of the lens frame unit, the main body opening, and the light-shielding mask in the above embodiment.

FIG. 38 is a layout diagram showing a light-shielding structure of a lens frame unit, a main body opening, and a light-shielding mask when a wide shooting screen size is selected in the embodiment.

FIG. 39 is a layout diagram showing a light-shielding structure of a lens frame unit, a main body opening, and a light-shielding mask when a narrow photographing screen size is selected in the embodiment.

FIG. 40 is an essential part cross sectional view showing a first modification of the light shielding structure in the above embodiment.

FIG. 41 is a cross-sectional view of a principal part showing a second modification of the light shielding structure in the above embodiment.

FIG. 42 is a cross-sectional view of a principal part showing a third modification of the light shielding structure in the above embodiment.

[Explanation of symbols]

 240 first panoramic gear 241 second panoramic gear 242 lower light-shielding mask 243 upper light-shielding mask 222 cam gear 13 film 51 rotating frame 201 body drive motor 202 sun gear 203 planetary gear 204 carrier 206 ... Switching plunger 208 ... Winding sun gear 215 ... Winding planet gear 217 ... Spool 219 ... Panorama sun gear 220 ... Panorama planetary gear 209 ... 1st zoom gear 210 ... 2nd zoom gear 225 ... 3rd zoom gear 226 ... 4th zoom gear 227 ... Zoom gear 223 ... Switch lever

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-5-34803 (JP, A) JP-A-5-107631 (JP, A) JP-A-63-95427 (JP, A) JP-A-7-954 43778 (JP, A) JP-A-5-323446 (JP, A) JP-A-6-35061 (JP, A) JP-A-7-20560 (JP, A) JP-A-3-122435 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 17/00-17/28

Claims (2)

(57) [Claims] 1. A camera in which a photographing screen size can be changed by changing a photographing screen size by covering a part of an aperture opening provided in a camera body, wherein the camera can slide straight in the vertical direction with respect to the aperture opening.
Supported by the upper and lower portions of the aperture opening.
Between the light-shielding position that covers one side and the aperture opening
A first light-blocking member that moves to an evacuation position for evacuation from
A shield covering the other of the upper and lower sides of the aperture opening.
The light position and the retreat position for retreating from the aperture opening
And a second light-blocking member that moves to the first and second positions.
When the light shielding member is in the retracted position, the first screen
The first and second light blocking members are in the light blocking position.
A screen size rule that defines the second screen size
The fixed light-shielding means is engaged with the first light-shielding member and is fixed to the camera body.
The first is rotatably provided and meshed according to the rotation.
A first rotating member for vertically moving the first light-blocking member, and a first rotating member meshed with the second light-blocking member;
It is engaged with the moving member and is rotatably mounted on the camera body.
The second light-blocking member is engaged and meshed in accordance with the rotation.
And up and down through the first rotating member.
A second rotating member for vertically driving the first light-shielding member, and a direction substantially perpendicular to the rotating axes of the first and second rotating members.
And a rotation shaft provided in the second rotation member.
Has a cam that comes into contact with the arm
A camera capable of switching a photographing screen size , comprising: a rotation driving cam member that rotationally drives a second rotation member . 2. The retreating device according to claim 1, wherein the first and second light shielding members are retracted.
Biasing means for biasing from the position to the light blocking position
However, when defining the second screen size, the first screen size
The light-shielding member and the second light-shielding member are in the direction in which
Abut each other in the state of being urged by the urging means
2. The camera according to claim 1, wherein the camera is capable of switching a photographing screen size.