JPH10312017A - Film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To switch picture frame size from/to or to/from full size/half size any time and to obtain the appropriate picture plane size in accordance with photographing circumstances by providing a picture frame changing member changing the size of the aperture of a photographic picture frame with the switching operation of a switching member. SOLUTION: The switching member 51 is movable, and a switching regulating member 18 is pushed downward against a compression spring by the inclined surface 51a of the member 51. As a result, a charge lever 21 is coupled with a 1st charge cam 14 in the case of the full size but is coupled with a 2nd charge cam 15 in the case of the half size. A stopping lever 22 is coupled with a 1st stopping cam 16 in the case of the full size but is coupled with a 2nd stopping cam 17 in the case of the half size. In the case of the full size, shutter charge and the winding preventing operation of a winding knob are performed by the 1/2 rotation of the 2nd charge cam 15 and the 2nd stopping cam 17. In the case of the full size, the shutter charge is performed by rotating the 1st charge cam 14 once and the rotation is stopped by the 1st stopping cam 16 after rotating once.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a film unit with a lens capable of switching a screen size and a film unit with a lens for urging a film in a film feeding path.

[0002]

2. Description of the Related Art Conventionally, a large number of film units with lenses capable of switching the screen size are commercially available.
For example, there is one that uses 135 film and can appropriately switch between a full size and a panorama size.

As described above, in a film unit with a lens that can be switched between a full size and a panoramic size, when switching to a panoramic size, only the short side is shortened by covering the upper and lower ends of the full size, and the longer side is left as it is. I had a landscape screen. Therefore, the number of shots did not change even when the screen size was switched.

[0004] Also, since 1996, APS film (IX)
240) is commercially available. In the case of a single unit that is taken out before loading into a film unit with a lens or a camera or after shooting, A
All PS films are stored in the cartridge,
A light-shielding door provided at the film entrance is closed so that the film inside the cartridge is not exposed to external light. On the other hand, after the cartridge is loaded into a film unit with a lens or the like, the light-shielding door is open to feed the film from the cartridge.

[0005]

The lens-fitted film unit does not require cumbersome operations of loading and rewinding the film, and the photographing operation is simple. Since film units with lenses have been made very small in recent years, there are many people who bring them to travel, but still they are considerably larger than film alone, so the number of units to bring is limited. Therefore, if there is a half-size film unit with a lens, double photographing can be performed with the same number. However, it is undeniable that image quality is inferior to half size than full size,
It is desirable that the configuration is not limited to the half size but can be appropriately switched according to the subject.

[0006] In addition, there are cases where the number of remaining frames is reduced when a photograph is taken using a film unit with a lens at a tourist spot or the like. When there is no spare film unit with a lens and there is no stand nearby, photographing is performed with a slight saving while paying attention to the number of remaining frames, so that even if there is a chance to take a picture, it is not necessary to photograph. In this case, if it is possible to switch to the half size, the number of remaining frames is doubled, and the chance of missing a photo opportunity is reduced.

SUMMARY OF THE INVENTION In view of the above problems, it is a first object of the present invention to propose a film unit with a lens capable of changing the size of an opening of a photographing frame to approximately 1/2.

On the other hand, as described above, in the film unit with the lens loaded with the APS film, the light-shielding door of the cartridge is open, but the film has a sufficient margin in the thickness direction at the film entrance. For this reason, the film may be shaken in the thickness direction due to the vibration caused by the operation of each member at the time of shutter release, and as a result, there is a risk that the photograph may be out of focus. Also,
In the 135 film, the patrone side shields the film entrance and exit with the patrone's telemp, and there is no gap in the thickness direction of the film, so that the film does not shake, but in the unexposed film chamber side, the same as above. A problem could occur.

In view of the above problems, it is a second object of the present invention to provide a lens-fitted film unit configured so that the film does not shake in the thickness direction due to the vibration caused by the operation of each member at the time of shutter release. I do.

[0010]

A first object of the present invention is to provide a film movement detecting member which rotates as the film moves by a winding operation of a winding operation member, and a shutter charge which rotates as the film movement detecting member rotates. Charging means for performing charging, a shutter charging state of the charging means, a first state of performing shutter charging within one rotation of the film movement detection member and preventing a winding operation by the winding operation member after one rotation is completed; A switching member for charging the shutter within one-half rotation of the film movement detection member and switching to a second state in which the winding operation by the winding operation member is prevented after the half rotation is completed; In accordance with the switching operation of the switching member to the second state, the size of the opening of the photographing frame is reduced to approximately one.
And an image frame changing member for changing to / 2.

The second problem is solved by any one of the following constitutions.

An urging member for urging the film from the width direction is provided in a film feeding path between an unexposed film chamber for storing the unexposed film and a film winding chamber for winding the exposed film. Film unit with lens.

[0013] Alternatively, a pressing member for pressing a predetermined portion on the back surface of the film is provided in a film feeding path between an unexposed film chamber for storing the unexposed film and a film winding chamber for winding the exposed film. A film unit with a lens, wherein the pressing member is formed integrally with a unit body including the unexposed film chamber and the film winding chamber.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention for solving the above first problem will be described in detail with reference to FIGS.

First, the basic principle of switching between full size and half size using 135 film is shown in FIGS.
This will be described with reference to FIG.

FIG. 1 is an explanatory diagram for switching from full size to half size. FIG. 1A is a view of an opening of a photographing frame for forming a full size. When the film F is exposed, a full size screen Fa of 36 mm wide × 24 mm long is formed as shown in FIG. You. Subsequently, FIG. 1C shows a state in which the film F is wound up by one frame, that is, 38 mm, and photographed again in full size. FIG. 1D is a view of an opening of a shooting image frame forming a half size.
After winding up the film F by one frame, that is, 38 mm, from the state of (B), the full-size photographing is not performed as shown in FIG. As a result, the horizontal 17m as shown in FIG.
A half-size screen Fb of mx 24 mm in height is formed.

As described above, there is no problem when the film F is switched to the half size after being wound by one frame and the half size exposure is performed. However, when the film F is switched to the half size before being wound after performing the full size exposure, The winding amount for half size is 1/2 of full size, 19mm
Therefore, if the photographing is performed thereafter, the screens with diagonal lines overlap as shown in FIG.

Therefore, if a full-size image is taken, it must be wound up by 38 mm and then switched to the half size only before the next exposure.
The state shown in (E) is obtained, and the problem of overlapping the screens does not occur. After switching to the half size, the exposure of the screen Fb is performed, and the film may be wound up by 19 mm for the next frame.

FIG. 2 is an explanatory diagram for switching from half size to full size. FIG. 2A is a view of an opening of a photographing frame for forming a half size, and a half size screen Fb is exposed by exposing a film F as shown in FIG.
Is formed. Subsequently, one frame of the film F, that is, 19 frames
Figure 2 mm rolled up and photographed again at half size
(C). FIG. 2D is a view of the opening of the photographic image frame forming the full size. After winding the film F by one full size frame, that is, 38 mm, from the state of FIG. 2B, FIG. 2), a full-size screen F is obtained as shown in FIG.
a is formed.

As described above, there is no problem if the film F is switched to the full size after the half-size exposure is performed, and then the film F is wound up to the full size. Since the winding amount of the half size is 19 mm, if a full size image is taken after that, the hatched screens overlap as shown in FIG.

Therefore, when switching from the half size to the full size, it is necessary to make the structure capable of switching after the shutter release is performed and the film is exposed.

Next, an embodiment of the film unit with a lens according to the present invention will be described in detail with reference to FIGS. FIG. 3 is a cross-sectional view of a film unit with a lens in which the photographing frame is switched to a full-size exposure opening, and FIG. 4 is a cross-sectional view of a film unit with a lens in which the photographing frame is switched to a half-size exposure opening. is there.

In FIG. 3, an unexposed film F is preliminarily manufactured at the time of manufacture.
Is wound on a reel 2 provided in the scroll chamber 1a and shipped. At the time of photographing, a subject image is exposed to an unexposed film F through a photographing lens L and a shutter 3. P
Is a 135-film patrone, and the patrone P is loaded into the patrone room 1b of the unit body 1, and the exposed film F is wound up and stored for each photographing.

The front surface of the film unit with a lens is covered with a front cover 4 to protect various photographing mechanisms including a winding mechanism to be described later. The rear surface of the film unit with a lens is covered with a rear cover 5 to protect various photographing mechanisms similarly to the front cover 4 and to keep the film F lighttight so that the film F is not exposed to external light.

At the time of film winding, when the winding knob 10 (winding operation member in the claims) shown in FIG. 8 is rotated counterclockwise, the shaft of the winding knob 10 is engaged with the spool Pa of the cartridge P. Therefore, the film F is wound up into the cartridge P.

Here, in this embodiment, 135 film is used, and a full size of 36 mm (width) × 24 mm (length) (first state in claims) and a width of 17 mm × 2 mm (length) are used.
This is a film unit with a lens that can be switched to a half size of 4 mm (the second state in the claims), and is full when the light shielding plate 6 (image frame changing member in the claims) is retracted as shown in FIG. When the light shielding plate 6 is rotated and protruded into the photographing image frame as shown in FIG. 4, it becomes a half size. 5 and FIG.
You may attach like.

FIG. 7 is a perspective view of an embodiment in which the light shielding plate 6 is rotated. The light shielding plate 41 is attached to the shaft 42,
The light shielding plate 43 is attached to a shaft 44. A gear 45 is attached to the upper end of the shaft 42, and a gear 46 is attached to the upper end of the shaft 44. The gear 46 meshes with the intermediate gear 47. Reference numeral 48 denotes a rack plate which slides in conjunction with an operation member (not shown). The rack 48a of the rack plate 48 meshes with the gear 45, and the rack 48b
7 meshed.

In the figure, the rack plate 48 is moved rightward,
This is a diagram in which the light-shielding plates 41 and 43 are set to a half-size opening. When the rack plate 48 is moved leftward, the gear 45 rotates counterclockwise, so that the light-shielding plate 41 also rotates counterclockwise. Since the gear 46 rotates clockwise by the counterclockwise rotation of the gear 47, the light shielding plate 43 also rotates clockwise. As a result, both the light shielding plates 41 and 43 are retracted to form a full size opening.

Of course, various mechanisms other than this mechanism, such as a link mechanism, can be considered. In the present invention, any mechanism may be used for switching the opening of the photographing frame.

On the other hand, in feeding one frame of film,
In the case of the full size, the film is fed by 8 perforations of the film, that is, 38 mm, and in the case of the half size, the film is fed by 4 film perforations, that is, 19 mm.

Therefore, as shown in FIG. 3 and the like, an eight-tooth sprocket 12 (film movement detecting member in the claims) is provided and meshed with the film F. When the sprocket 12 is full size, it is equivalent to eight sprockets, that is, sprockets. 12 only needs to be rotated once, and the sprocket 12
, Ie, the sprocket 12 may be rotated half a turn. Therefore, when full size, sprocket 1
It is necessary to charge the shutter and stop the winding knob by half a rotation of the sprocket 12 in the case of half size by one rotation of 2, and the mechanism such as charging means will be described below with reference to FIGS. explain.

FIG. 8 is a top view immediately before the shutter release and before the winding operation, FIG. 9 is a top view at the start of the winding operation, FIG. 10 is a top view immediately before the completion of the winding operation, and FIG. 12 is a front view of the shutter, FIG. 13 is a diagram in which a charge cam and a stop cam are switched by switching between a full size and a half size, and FIG. 14 is a perspective view of a charge cam and a stop cam.

First, the structure of the members shown in the figure will be described.

In FIG. 8, the film F is wound into the patrone P by rotating the winding knob 10 in a counterclockwise direction as described above. One end of the film F is connected to a ratchet gear 10a provided on the outer periphery of the winding knob 10. Reverse rotation in the winding direction is prevented by a reverse rotation preventing claw 11 fixed to the main body 1 and utilizing the elasticity of the resin material.

On the other hand, as shown in FIGS. 13 and 14, a rotary shaft 1 having a shaft portion 13a formed in a two-way slide at a lower portion.
3 fits into a circular hole drilled in the unit body 1, and furthermore, the shaft portion 13 a fits into a modified hole 12 a drilled in the sprocket 12.
Rotates integrally. Further, a shaft portion 13b formed in a two-sided manner above the rotating shaft 13 has a first charge cam 14 for full size and a second charge cam 1 for half size.
5. The first stop cam 16 for the full size, the second stop cam 17 for the half size, and the switching restricting member 18 are fitted in irregularly shaped holes formed at the center. As a result, the rotating shaft 1
3, the first charge cam 14, the second charge cam 1
5, the first stop cam 16, the second stop cam 17, and the switching restricting member 18 rotate integrally.

Reference numeral 19 denotes a compression spring that pushes up from below the first charge cam 14, and 51 denotes a switching member that switches between full size and half size.
(A) is a diagram when switching to full size, FIG.
(B) is a diagram when switching to half size,
These operations will be described later.

Returning to FIG. 8 again, the description will be made assuming that the half size has been switched for convenience.

The second charge cam 15 and the like and the hoist knob 10
The charge lever 21 and the stop lever 22 are coaxial about the shaft 23, and the charge lever 21 is located below the stop lever 22 and is rotatably mounted on the unit main body 1. . A tension spring 24 is provided on the charge lever 21.
To urge the charge lever 21 counterclockwise.

The torsion coil spring 25 is connected to the stop lever 2.
2 and the pin 29 erected on the charge lever 21 to urge the stop lever 22 clockwise with respect to the charge lever 21.

Further, a stop claw 26 is rotatably mounted on the unit main body 1 by a shaft 27 between the charge lever 21 and the like and the winding knob 10, and the stop claw 26 is clocked by a torsion coil spring 28. Biased in the direction.

Next, the operation from the start of winding to the end of winding will be described.

When the winding knob 10 is rotated counterclockwise immediately after the shutter release in FIG. 8, the film F is fed as described above, and the sprocket 12 shown in FIG. And rotate counterclockwise. Then, the second charge cam 15 and the second stop cam 17
Also rotates counterclockwise, as shown in FIG. 9, presses the tip of the first arm 21a of the charge lever 21 by the second charge cam 15, and pushes the charge lever 21 counterclockwise against the tension spring 24. Rotate. Then, as shown in FIG. 10, the second arm 21b of the charge lever 21 gets over the end 33b of the sector that rotates on a plane perpendicular to the figure. In this manner, shutter charge of the charge lever 21 is performed.

The operation of the sector as the shutter blade will now be described with reference to FIG.

The sector 31 rotates about an axis 32,
FIG. 12 is a view showing a state in which the optical path 33 of the photographing lens is closed. The sector 31 is urged counterclockwise by a tension spring 34, but the terminal 33a is contacted by a stopper 35, and Does not rotate. At the time of shutter charge, the second arm 21 of the charge lever 21
b crosses over the end 33b of the sector 31 from the right side in the figure. At this time, since the hole 31c of the sector 31 fitted with the shaft 32 is formed in an elongated hole, the end 33b is formed by the second arm 21b. Is pressed, and the sector 31 is slightly lowered.
3 is never released. Thereafter, when the second arm 21b moves to the left and is charged to the position shown by the two-dot chain line, and moves quickly to the right by the shutter release, the left side of the end 33b of the sector 31 is hit, and the sector 31 is hit. Is axis 32
, And the optical path 33 is opened. When the second arm 21b climbs over the end 33b, the sector 3
Reference numeral 1 denotes the urging force of the tension spring 34, which is restored to the state shown in the drawing, and the optical path 33 is closed. Thus, sector 3
1 opens and closes.

Before the shutter is charged by the charge lever 21, the first arm 26a of the stop claw 26 is engaged with the tip 21c of the third arm of the charge lever 21 so that the stop claw 26 moves clockwise. Rotation is prevented. However, when the charge lever 21 is rotated clockwise to perform shutter charge, the tip 21c of the third arm and the first arm 26a of the stop claw 26 are engaged as shown in FIG. The stop claw 26 is slightly rotated clockwise by the biasing force of the torsion coil spring 28. However, the first arm 26a of the stop claw 26 is connected to the tip 2 of the third arm of the charge lever 21.
1c as well as the step 22 of the stop lever 22
a, the first arm 26a of the stop claw 26 becomes the step 22a of the stop lever 22 after the tip 21c of the third arm of the charge lever 21 is retracted.
Engage with. Therefore, the pawl 26b of the stop pawl 26 has not yet engaged the ratchet gear 10a of the hoisting knob 10. At this time, the tip of the first arm portion 26a of the stop claw 26 goes around the side portion 21d of the charge lever 21.

Subsequently, when the second charge cam 15 and the second stop cam 17 further rotate and the second charge cam 15 and the second stop cam 17 rotate nearly 180 degrees as shown in FIG. The tip of the first arm 22a jumps into the notch 15a of the second stop cam 17 by the urging force of the torsion coil spring 25, and the stop lever 22 rotates clockwise. As a result, the second stop cam 17 rotates by １ ／ and stops, so that the second charge cam 15 and the sprocket 12 shown in FIG.

The step 22a also rotates clockwise with the rotation of the stop lever 22, so that the first arm 26a of the stop claw 26 is disengaged from the step 22a, and the stop claw 26 is disengaged. Is rotated clockwise, and the pawl 26b is
To prevent the counterclockwise rotation of the hoisting knob 10, that is, the hoisting operation. At this time, the first arm 26a of the stop claw 26 is
1 will be in contact with the side 21d.

When the winding is completed as described above, the first arm 21a of the charge lever 21 is not in contact with the second charge cam 15, but the first arm 26a of the stop claw 26 is Since the rotation of the charge lever 21 in the counterclockwise direction by the tension spring 24 is prevented, the charge lever 21 maintains the state in which the shutter charge has been performed.

Next, the operation of releasing the shutter when the shutter charge is completed as shown in FIG. 11 will be described.

When a release button (not shown) provided on the upper surface of the front cover 4 is pressed, a release shaft 4a provided on the back surface of the release button presses the inclined portion 26c of the stop claw 26 from the upper surface in FIG. . The inclined portion 26c is provided with the winding knob 10
, The stop claw 26 is turned counterclockwise against the torsion coil spring 28. Then, the first arm 26a of the stop claw 26 retreats from the side 21d of the charge lever 21, so that the charge lever 21 rapidly rotates counterclockwise by the urging force of the tension spring 24,
The second arm 21b rapidly contacts the end 33b of the sector 31 to open and close the sector 31 as described above.

The first arm 26a of the stop claw 26 is engaged again with the tip 21c of the third arm of the charge lever 21 and returns to the state shown in FIG.
Is separated from the ratchet gear 10a of the hoist knob 10, and the hoist knob 10 becomes rotatable.

As described above, the second charge cam 15 and the second
The shutter charge,
Since the operation of stopping the winding knob can be performed, the same operation can be performed in the next １ ／ rotation.
For this purpose, the second charge cam 15 and the second stop cam 1
In 7, the two cams having the same shape may be arranged point-symmetrically.

13 and FIG. 1 for the full size.
4 engages with the charge lever 21, and the first stop cam 16 engages with the stop lever 22. The first charge cam 14 is formed in the shape of only one of the second charge cams 15 formed of two cams, and the first stop cam 16 is formed in the shape of the second stop cam 17 having only one cutout 17a. ing. Therefore, in the case of the full size, the shutter charge is performed by one rotation of the first charge cam 14, and after this one rotation, the rotation is stopped by the first stop cam 16.

Next, a switching mechanism for switching from the full size to the half size will be described with reference to the above-mentioned figures, further including FIGS.

FIG. 15 is a view of the switching member and the stop claw in a state corresponding to FIGS. 8 to 10, wherein FIG. 15 (A) is a top view and FIG. 15 (B) is a side view. FIG. 16 is a view of the switching member and the stop claw in a state corresponding to FIG.

Reference numeral 61 denotes a switching member,
8 and a member that is formed integrally with the switching member 51 or that moves in conjunction with it.
, So that it is rotatably supported. A torsion coil spring 64 is attached to the support shaft 63, and one end is engaged with a stopper pin 65 erected on the switching member 61 and the other end is engaged with a spring hook pin 66 erected on the locking claw 62. Accordingly, although the locking claw 62 is urged clockwise, since the left arm 62a of the locking claw abuts the stopper pin 65, clockwise rotation is restricted.

When switching from the full size to the half size, the switching member 61 having such a structure is moved from the left to the right in the figure, but the stop claw 2 as shown in FIG.
6 is the ratchet gear 10a of the hoisting knob 10.
Is not engaged with the stop pawl 2
6 and cannot move due to contact with the pin 26d erected at 6. However, in the state shown in FIG.
Is engaged with the ratchet gear 10a of the winding knob 10, so that the pin 26d of the stop claw 26 is retracted upward in the drawing. Therefore, the switching member 61 can be moved rightward.

That is, the condition under which the switching member 61 can be moved from the left to the right to move from the full size to the half size is only the state where the winding is completed and before the shutter raise.

It is to be noted that the reason for returning from the half size to the full size after the shutter release is that when the switching member 61 is moved from the right to the left, the pin 26d is moved from the right to the left. Even if the locking claw 62 abuts, the locking claw 62 can rotate in the counterclockwise direction.
Regardless of the position of 6d, there is no problem in moving the switching member 61 to the left.

When the switching member 61 is movable, FIG.
Is also movable from left to right, and the switching restricting member 18 is pushed down by the slope 51 a of the switching member 51 against the compression spring 19. As a result, the first charge cam 14 for the full size, the second charge cam 15 for the half size, and the first stop cam 1 for the full size
6. The second stop cam 17 for the half size is also moved downward, and the charge lever 21 is engaged with the first charge cam 14 in the full size. The stop lever 22 is engaged with the first stop cam 16 at full size, but is engaged with the second stop cam 17 at half size.

Next, a configuration for switching from half size to full size will be described.

As shown in FIGS. 13 and 14, when the switching is performed to the half size, the lower end portion 51b of the switching member 51 is in contact with the bottom surface 18a of the hole provided in the switching regulating member 18. Therefore, the switching member 51 can be moved to the left only when the switching restricting member 18 is rotated to a position where the switching member 51 comes out of the notch 18b. In this state, the winding of one frame in the full size is completed. The reason for limiting to this state is to prevent the shutter charge and the like from becoming halfway, and to switch the half-size frame from the half-size to the full-size unless the half-size frame is shot even-numbered and then equivalent to the full-size negative case. This makes it impossible to store six frames at a time, resulting in unnecessary confusion after film development.

As shown in FIG. 2, the photographing screens are duplicated unless switching to the full size after the shutter release is completed. For this reason, a mechanism shown in FIG. 17 is further added.

In FIG. 17, reference numeral 71 denotes a switching member.
It is a member that is formed integrally with the switching members 51 and 61 or that moves in conjunction with the switching members, and the state of FIG. 17 is a state in which the state is switched to half size. A locking claw 72 is provided below the switching member 71, and is urged clockwise by a torsion coil spring 74 about a support shaft 73. Reference numeral 75 denotes a stopper pin for hooking one end of the torsion coil spring and rotating the locking claw 72 clockwise.

Reference numeral 21b denotes the second charge lever 21 described above.
FIG. 17A is a diagram showing a state in which charging has been completed, and FIG. 17B is a diagram showing that the second arm 21b has returned to a position before charging by a release operation. In the charging completed state, as shown in FIG. 17A, the second arm 21b pushes up the lower part of the locking claw 72, so that even if the switching member 71 is to be moved to the left, the claw portion of the switching member 71 is The switching member 71 cannot move to the left because 71 a abuts on the claw portion 72 a of the locking claw 72. However, FIG.
When the second arm 21b returns to the position before charging as shown in (B), the locking claw 72 rotates clockwise, and the switching member 7 rotates.
Since the one claw portion 71a does not contact the claw portion 72a of the locking claw 72, the switching member 71 can move to the left,
That is, the state can be switched from the half size state to the full size state.

As described above, switching from the half size to the full size is possible only when the winding is completed in the full size and the shutter release is completed.

In FIG. 17, since the position of the claw portion 71a of the switching member 71 and the position of the stopper pin 75 are shifted in the vertical direction of the drawing, they do not abut each other.

When switching from the full size to the half size, the second arm 21b of the charge lever 21 is used.
17A shows the state shown in FIG. 17A, in which the switching member 71 moves from the left to the right,
Since 1b has elasticity in the vertical direction, even if the claw portion 71a abuts on the left side of the claw portion 72a, it can easily get over.

Next, an embodiment of the invention for solving the second problem will be described in detail with reference to FIGS.

First, an urging member for urging the film in the width direction will be described. FIG. 18 is a perspective view centering on the photographing frame, and FIG. 19 is a front view showing the state in which the film is fed to the photographing frame. FIG.

In FIG. 18, an unexposed film chamber 101a for accommodating an unexposed film and a film winding chamber 101 for winding an exposed film are provided in a unit main body 101.
b are provided on both sides of the image frame 101c. Users can wind the film F _A for each shooting, but causes feeding unexposed film chamber 101a to the film winding chamber 101b, a first guide 101d as a positioning in the width direction of the film F _A in the photographing frame 101c, the Two guides 101e are provided. Further, the first guide 101d
Around the are biasing member 102 is provided for urging the film F _A in the width direction. The biasing member 102 has a pressing portion 102a for pressing the film F _A at both ends, the rear of the pressing portion 102a is pressed portion 102a has an elongated notch 102b as retractable.

Here, the width of the film F _A is W, the distance between the first guide 101d and the second guide 101e is L ₁ , and the distance between the pressing portion 102a of the urging member 102 and the second guide 101e is L ₂ . Then, the dimensions satisfy the following conditional expression.

L ₂ <W <L ₁ Therefore, since the film F _A is urged from the width direction by the pressing portion 102a, the film does not shake in the thickness direction due to the vibration caused by the operation of each member at the time of shutter release. .

[0074] As the pressing portion for pressing the film F _A in the width direction, it is not limited to two positions, 1
Or three or more locations.

The position of the pressing portion may be any position in the film feeding path between the unexposed film chamber 101a and the film winding chamber 101b.

Next, a pressing member for pressing the film from the back surface will be described. FIG. 20 is a perspective view of the lens-equipped film unit provided with the pressing member as viewed from the back surface, and FIG.
FIG. 22 is a sectional view taken along the line AA when the film is fed, and FIG. 22 is a view showing the distance between the pressing member and the rail surface.

As in FIG. 18, 111 is the unit body,
Reference numeral 111a denotes an unexposed film chamber, 111b denotes a film winding chamber, 111c denotes an image frame, 111d denotes a first guide, and 111e denotes a second guide. 111f and 111g
Is first rail face and a second rail surface for regulating the position in the thickness direction of the film F _A. From the second guide 111e to the second
An L-shaped pressing member 111h is formed integrally with the unit main body 111 and protrudes above the rail surface 111g. Then, the tip portion 111i of the pressing member 111h as shown in FIG. 21 presses the film F _A between the second rail surface 111 g.

[0078] The film thickness of the F _A and t, the pressing member 111h of the tip 1 before the film F _A is fed
Assuming that the gap between 11i and the second rail surface 111g is D as shown in FIG. 22, the following conditional expression must be satisfied.

D <t It is more preferable that the following conditional expression is satisfied.

D <t−0.01 (mm) The lower limit of D may be appropriately determined so that the film winding is not heavy and the film is not damaged.

[0081] Thus, even if the gap D is smaller than the thickness of the film F _A, the pressing member 111h has elasticity, the film F _A also presses the film F at the tip portion 111i feeding It is possible, and the film does not shake in the thickness direction due to the vibration caused by the operation of each member at the time of shutter release.

[0082] As the pressing member for pressing the film F _A from the back, it is not limited to two positions, 1
Or three or more locations.

The position of the pressing member may be any position in the film feeding path between the unexposed film chamber 111a and the film winding chamber 111b.

[0084]

According to the film unit with a lens according to any one of the first to fourth aspects, it is possible to switch between the full size and the half size at any time, so that an appropriate screen size can be obtained depending on the shooting conditions.

According to the film unit with the lens of claim 5, when switching between the full size and the half size,
It is possible to prevent the shooting screens from overlapping.

According to the film unit with the lens according to the sixth and seventh aspects, it is possible to prevent the film from being shaken in the thickness direction due to the vibration caused by the operation of each member at the time of shutter release.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for switching from a full size to a half size.

FIG. 2 is an explanatory diagram for switching from half size to full size.

FIG. 3 is a cross-sectional view of a film unit with a lens in which a photographing frame is switched to a full-size exposure aperture.

FIG. 4 is a cross-sectional view of a film unit with a lens in which a photographing frame is switched to a half-size exposure aperture.

FIG. 5 is a cross-sectional view of a film unit with a lens in which a photographing frame is switched to a full-size exposure aperture according to another embodiment.

FIG. 6 is a cross-sectional view of a film unit with a lens in which a photographing frame is switched to a half-size exposure aperture according to another embodiment.

FIG. 7 is a diagram of an embodiment in which a light shielding plate is rotated.

FIG. 8 is a top view immediately after the shutter release and before winding.

FIG. 9 is a top view at the start of the winding operation.

FIG. 10 is a top view immediately before completion of a winding operation.

FIG. 11 is a top view of the end of the winding operation.

FIG. 12 is a front view of a shutter.

FIG. 13 is a diagram in which a charge cam and a stop cam are switched by switching between a full size and a half size.

FIG. 14 is a perspective view of a charge cam, a stop cam, and the like.

FIG. 15 is a view of a switching member and a stop claw in a state corresponding to FIGS. 8 to 10;

FIG. 16 is a view of a switching member and a stop claw in a state corresponding to FIG. 11;

FIG. 17 is a mechanism diagram for switching from half size to full size.

FIG. 18 is a perspective view focusing on a photographing frame.

FIG. 19 is a front view in which a film is fed to a photographing frame.

FIG. 20 is a perspective view of a lens-fitted film unit provided with a pressing member as viewed from the back.

FIG. 21 is a sectional view taken along the line AA when the film is fed.

FIG. 22 is a diagram illustrating a distance between a pressing member and a rail surface.

[Explanation of symbols]

 F Film Fa Full-size screen Fb Half-size screen 1 Unit body 6, 41, 43 Light shield plate 10 Winding knob 12 Sprocket 14 First charge cam 15 Second charge cam 16 First stop cam 17 Second stop cam 18 Switching control Member 19 Compression spring 21 Charge lever 22 Stop lever 26 Stop claw 48 Rack plate 51, 61, 71 Switching member 62, 72 Lock claw F_A the film  101, 111 Unit body 101d First guide 101e Second guide 102 Biasing member 102a Pressing portion 111e Second guide 111g Second rail surface 111h Pressing member 111i Tip

Claims (7)

[Claims] 1. A film movement detecting member that rotates with the movement of a film by a winding operation of a winding operation member, a charging unit that performs shutter charging in accordance with the rotation of the film movement detecting member, and a shutter charging of the charging unit. The state is defined as a first state in which the shutter operation is performed within one rotation of the film movement detection member and a winding operation by the winding operation member is prevented after one rotation is completed, and within one half rotation of the film movement detection member. Perform shutter charge and 1
A switching member for switching to a second state in which the winding operation by the winding operation member is inhibited after the end of the 1/2 rotation; and photographing in accordance with the switching operation of the switching member from the first state to the second state. Approximately 1/2 the size of the opening of the picture frame
A film unit with a lens, comprising: 2. A charge cam for performing shutter charge in the first state, comprising:
In the second state, there are two charge cams for performing shutter charge, and one switching cam used in the first state by the switching operation of the switching member and two charging cams used in the second state. The film unit with a lens according to claim 1, wherein the switching is performed by moving the charge cams in the axial direction. 3. A cam for preventing rotation of the film moving member in the first state, and a cam for preventing rotation of the film moving member in the second state. A rotation-preventing cam used in the first state and two rotation-preventing cams used in the second state in the axial direction by the switching operation of the switching member. The film unit with a lens according to claim 1, wherein the film unit is moved and switched. 4. An opening of the photographic image frame in the first state has a full size of 36 mm in width × 24 mm in height, and an opening of the photographic image frame in the second state has a width of 17 mm × 24 in length.
The half size of mm.
4. The film unit with a lens according to any one of items 3 to 5. 5. The first state can be switched to the second state only before winding up and before a shutter release, and the second state can be switched from the second state only after winding up and after a shutter release. The film unit with a lens according to any one of claims 1 to 4, wherein the film unit can be switched to the state (1). 6. An urging member for urging a film from a width direction is provided in a film feeding path between an unexposed film chamber for storing an unexposed film and a film winding chamber for winding an exposed film. A film unit with a lens. 7. A pressing member for pressing a predetermined portion on the back surface of a film is provided in a film feeding path between an unexposed film chamber for storing an unexposed film and a film winding chamber for winding an exposed film. A film unit with a lens, wherein the pressing member is formed integrally with a unit body including the unexposed film chamber and the film winding chamber.