JP2837992B2 - Film pack and pack holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film pack in which a plurality of sheet films are stacked and stored, and a photograph can be sequentially taken on these sheet films, and a pack holder using the same. Things.

[0002]

2. Description of the Related Art A large camera such as a view camera or a studio camera is used to take a photograph for creating a product catalog or a photograph on the premise of a large stretch. The size of a film used in a large-sized camera is 4 × 5 inches or more, and is particularly effective when sharpness is required. Among such large cameras, there is a type in which a photographic dry plate or a sheet film having a large film size is exchanged for each photographing, but a rapid response cannot be taken when photographing is repeated.

[0003] Against this background, US Pat.
No. 72 and Japanese Utility Model Laid-Open Publication No. 50-22229 propose a film holder.
X5 Quick Changer (trade name) "has been commercialized. The film holder used for these is composed of an outer frame mounted on the camera and an inner frame housed in the outer frame. About 5 to 10 sheet films are stacked and stored in the inner frame, and a slidable lid is provided to shield the exposure opening formed on the front surface of the inner frame. Also, the inner frame itself is slidable with respect to the outer frame. After the outer frame is mounted on the camera, the lid and the inner frame are alternately slid, so that the photographed film is the lowermost layer of the inner frame. And a new film is set on the uppermost layer, which is the photographing position. Therefore, by operating the lid and the inner frame, it is possible to perform shooting for the number of sheet films.

[0004] However, the known film holder has an advantage that the photographing can be performed sequentially about 5 to 10 times, but the outer frame and the inner frame are inseparably connected. Therefore, if it is expected that the photographing will be continued more times, several film holders must be prepared. Therefore, aside from shooting in the studio, outdoor photography such as mountain photography not only has a problem in portability, but also after finishing filming for one film holder, the outer frame of a new film holder is re-opened. It had to be positioned and mounted on the camera, and improvement in operability was also desired. In view of such circumstances, the present applicant has proposed a system in Japanese Patent Application No. 2-416493 that enables a film pack corresponding to the inner frame to be separated from a pack holder corresponding to the outer frame. According to this, the film pack can be exchanged and used for one pack holder, and portability,
It becomes very convenient in terms of operability.

[0005]

In the above-mentioned system, the film pack is provided with a film counter mechanism for counting and displaying the number of photographed films. For example, even if the film packs are exchanged during photographing, each film pack is replaced. Is clearly understood. However, this has the disadvantage of increasing the production cost of the film pack, and it is difficult to carry a large number of film packs. In addition, it is assumed that the film pack will be used repeatedly, so the user takes out the used sheet film in a dark room or dark bag, and takes it to the lab. After sealing in such a place, a new sheet film is inserted into a thin frame called a sheath, and this sheet film unit is set in a film pack.

The present invention has been made in view of the above circumstances, and has as its object to provide a film pack and a pack holder which can display the number of shots at low cost.

[0007]

According to a first aspect of the present invention, there is provided a film pack comprising: a pack body for storing a plurality of sheet film units in a stacked manner; and a front wall of the pack body. An opening for exposing the uppermost sheet film unit; a lid slidably incorporated in the pack body to open and close the opening; and a movable displacement signal provided on the pack body to provide a mechanical displacement signal from outside the pack body. And a counter display plate that is stepped and moved in response thereto.

[0008] The pack holder according to the second aspect is the first aspect.
A pack storage unit for storing the described film pack, and one mechanical movement in conjunction with one reciprocating movement operation of the film pack performed for each photographing operation or one reciprocating movement operation performed for each photographing operation. And a counter feed mechanism that makes a large displacement and steps up the counter display plate provided on the film pack.

In the film pack and the pack holder according to the third aspect, a plurality of sheet film units are stacked and stored, and the counter display plate is stepped and moved by receiving a mechanical displacement signal from outside the pack body. And a counter feed mechanism for applying a mechanical displacement signal to the counter display panel in conjunction with one reciprocating sliding operation of the film pack loaded with the film pack and performed for each photographing. And a pack holder.

[0010]

1 and 2, a film pack 1 to which the present invention is applied has a box-shaped pack body 3 having a detachable cap 2 at a front end thereof, and a plurality of sheets packed and stored therein. Sheet film unit 4 and pack body 3
A lid 5 with a handle 5a for opening and closing an opening 3a formed on the front surface of the package, and a disc-shaped counter display plate 6 for displaying the number of photographed sheets of the sheet film unit 4 provided at an end of the pack body 3 near the handle 5a. And The lid 5 is larger in size than the sheet film unit 4. After the film pack 1 is loaded into the pack holder, the handle 5a is pushed and pulled to hold the film pack 1 along the groove 3b formed on the inner surface of the side wall of the pack body 3. Can slide.

The cap 2 has a claw member 7 inside. The claw member 7 is formed with claws 7 a and 7 b which engage with locking holes 5 b and 5 c formed on the tip side of the lid 5 to lock the lid 5 to the cap 2. The claw member 7 has bifurcated spring portions 7c and 7d at its lower portion, and is constantly urged toward the lid 5 by this. Also, the claw member 7
Are formed with projections 7e and 7f at right angles to the claws 7a and 7b, and these are formed with openings 2a and 2b of the cap 2.
It is projected from. The openings 2a and 2b are
In the direction of movement. The protrusion amounts of the protrusions 7e and 7f from the openings 2a and 2b are the same as the heights of the ridges 8 provided on the left and right of the openings 2a and 2b, so that the protrusions 7e and 7f are not carelessly pressed. ing.

When the film pack 1 is loaded in the pack holder, the projections 7e and 7f are pushed down by a later-described projection on the pack holder side, and the pawls 7a and 7b are disengaged from the engaged locking holes 5b and 5c. Come off. Also, cap 2
A groove 2c is formed in the upper portion of the film holder, and when the film pack 1 is loaded in the pack holder, the projection on the pack holder engages with the groove to lock the cap 2 in the pack holder. Reference numeral 9 denotes a bent plate including a cover 9a for enclosing the claw member 7 inside the cap 2 and a receiving portion 9b for receiving an end of the photographed sheet film unit 4. However, a gap is provided above the bent plate 9 so that the tip of the lid 5 can enter the cap 2, and below and on the left and right thereof, the tip 3 c of the pack body 3 can enter the cap 2. ing. A partition 3d for regulating the end position of the sheet film unit 4 is provided inside the front end portion 3c.
e is provided with a gap. This gap is
A collection port 10 for receiving the photographed sheet film unit 4.

The counter display plate 6 is rotatably dropped into a box-shaped storage chamber 3f, and a holding plate 11 having a spring portion is provided from above to be guided by a guide groove 3g of the storage chamber 3f. Have been. Spring part end 1 of holding plate 11
Since 1 a is regulated by the inner wall surface of the lid 5, the lower end 11 b of the pressing plate 11 is always in contact with the reverse rotation preventing claw 6 a formed on the peripheral edge of the counter display plate 6. This reverse rotation preventing claw 6a is a number indicating the number of shots, for example, “1”,
One tooth is provided for each of “2”, “3”,..., “7”, and their heights are all the same, but only the portion corresponding to the end mark “E” is higher than the others. And its upper surface is flat. Thereby, during photographing, the upper end 11c of the holding plate 11 is held at a predetermined distance from the inner wall surface of the lid 5, but after the last sheet film unit 4 is photographed, the holding plate 11c is held. Is raised, the upper end 11c is engaged with the locking hole 5f of the lid, and the lid 5 is locked to the pack body 3 so as not to be pulled out.

A tooth 6b (see FIG. 4) is formed at the peripheral end of the counter display plate 6, and the counter display plate 6 is moved in only one direction by engaging a counter feed claw described later. Is done. The teeth 6b have a shape in which the slope of the mountain is inclined to one side, so that the teeth are not engaged with the teeth 6b when the counter feed pawl is returned in preparation for feeding. The "1", "2", "3",..., "7", and "E" are engraved on the back surface of the claw 6a of the counter display plate 6, and the counter display for observing these is displayed. A window 3h is formed at the bottom of the storage room 3f. In addition, pack body 3
A hole 3i is formed in the vicinity of the storage chamber 3f. A claw portion of a latch mechanism provided on a slide frame, which will be described later, protrudes from the hole 3i. Reference numeral 3j is
This is a notch into which a projection of the lid 5 described later enters.

A step 5d is formed on the lower surface of the lid 5 on the side of the handle 5a.
(See FIGS. 3 and 5), and this is the pack body 3
And prevents the lid 5 from moving toward the cap 2 when the lid 5 is connected to the cap 2 by the claw member 7. There is no departure from.

The sheet film unit 4 has a 4 × 5 inch size sheet film 13a and a sheath 13b made of a thin metal plate having four sides bent so as to support the base surface side and surround four end sides of the sheet film 13a.
It is composed of If the flatness of the sheet film 13a is maintained and the sheet film 13a has sufficient strength, the sheath 13
It is also possible to make b from plastic.

As shown in the sectional view of the main part of FIG. 3, the pack body 3 contains, for example, seven sheet film units 4 stacked therein, and a pressure plate having one end fixed to the inner wall on the back surface of the pack body 3. It is pressed to the front side by the spring 12. Thereby, the sheet film unit 4 is pressed against the bottom surface of the lid 5. Reference numerals 17 and 18 denote telemps that prevent external light from entering from a gap between the sliding contact surface on which the sliding lid 5 slides and the sliding lid 5.

As shown in FIG. 1, a pack holder 19 to which the film pack 1 is loaded and used includes a holder body 19a, a lid 21 rotatably attached to the holder body 19 via a hinge 20, and a holder. A tray-shaped slide frame 22 slidably mounted in the main body 19a.
The lid 21 is provided with a photographing opening 23 having a size smaller than that of the sheet film unit 4, and a receiving surface 24 for receiving the upper surface of the sheet film unit 4 and positioning the sheet film unit 4 at the photographing position is formed below the photographing opening 23. Have been. A groove is formed outside the receiving surface 24 in the longitudinal direction of the receiving surface 24, and one end of the groove is fixed to the groove.
A plurality of leaf springs 26 are provided. This leaf spring 26
The film pack 1 is loaded into the pack holder 19 and the lid 2
When closed, the pack body 3 is pressed downward in the figure. Further, as will be described in detail later, these leaf springs 26 also have a function of pressing the sheet film unit 4 discharged from the pack body 3 from above. And the hinge 2 of the lid 21
In the vicinity of 0, a projection 27 that engages with the groove 2c of the cap 2 and locks the cap 2 in the pack holder 19 when the film pack 1 is loaded, and the projections 7e and 7f of the claw member 7 are pressed down to Protrusions 28 are formed to separate 7a, 7b from locking holes 5b, 5c of lid 5 (see FIG. 3).

In a box portion 31 provided on the rear end side of the slide frame 22, a slide frame 22 is provided between the box frame 31 and the holder body 19a.
And a counter feed mechanism for moving the counter display plate 6 step by step. 4 and 5 showing the structure of the latch mechanism and the counter feed mechanism, an elongated flat plate-like lever 32 is slidably attached to one long side inner wall of the slide frame 22 along the same. The lever 32 has a bent portion 32a at the end, and is in an initial state shown in FIG. 4 (a state immediately after the film pack 1 is loaded in the pack holder 19).
In this case, the bent portion 32a is sandwiched between the leg 21a of the lid 21 and the front end 22a of the slide frame 22, and the position is regulated.

Holes 22b, 3 are provided in the plate 34 fixed to the slide frame 22, the lever 32 and the inner wall of the holder body 19a.
2b and 34a are formed, and they overlap in a straight line in the initial state shown in FIG. And these holes 22
A round bar-shaped lever 35 biased toward the plate 34 is inserted into the b, 32b, and 34a, and the slide frame 22 and the lever 32 are locked to the holder body 19a. Further, a pin 36 is fixed to the lever 32, and a counter feed lever 37 with which one end 37a is engaged is
8 is attached so as to be freely rotatable. The other end of the counter feed lever 37 is a counter feed claw 37b, which engages with the teeth 6b of the counter display plate 6 to advance the counter display plate 6.

A lever 40 is mounted above the counter feed lever 37 so as to be rotatable about a shaft 41 and urged in a counterclockwise direction. The lever 40 is bent substantially at the center, and has a left and right step in the drawing of FIG. A lever 42 is slidably mounted on the lower right side of the lever 42. The lever 42 is provided with a pin 43 implanted on the lever 40 and a spring 44 bridged between the end 42a of the lever 42 as shown in FIG. In the drawing. As shown in FIG. 5, on the left back side of the lever 40, the claw portion 42b of the lever 42 is
An L-shaped locking lever 46 for locking the 2 at the initial position is attached to the step side surface of the lever 40 so as to be rotatable and urged clockwise by a spring 47. A receiving portion 46a is formed at an end of the locking lever 46 at right angles to the locking lever 46, and the receiving portion 46a is
When the locking projection 46a is pressed downward by the zero projection 50a, the locking lever 46 is rotated counterclockwise to unlock the lever 42.

The lever 50 is inserted into the lever 35, and is urged clockwise by a spring 51. As shown in FIG. 1, the claw portion 50 b of the lever 50 is
When the film pack 1 is loaded into the pack holder 19, the pack body 3 protrudes from the hole 31a.
3i, is brought into contact with the back surface of the lid 5. The claw portion 50b is engaged with the locking hole 5c when the opening 3a is fully opened (see FIG. 6), restricts the pulling range of the pull lid 5, and rotates clockwise by continuing the pulling operation of the pull lid 5. Be moved.

As shown in FIG. 4, two pins 54 and 55 are implanted in the lever 35, and a lever 56 is connected to the pin 55 through an elongated hole 56a formed at the end. Have been. The lever 56 is attached rotatably about a shaft 57 and has a bent portion 56b at the tip. A section 59 colored red, for example, is fixed to the lower part of the section. The section 59 appears in a window 61 a of an arc-shaped projection 61 (see FIG. 1) protruding at the center of the front end of the slide frame 22, so that preparation for photographing is performed. The completion is notified to the photographer.

A pin 62 is implanted in the upper part of the counter feed lever 37. When the counter feed lever 37 is rotated in preparation for the counter feed, the pin 62 engages with the claw 42c of the lever 42. To return the lever 42 to the initial position. When the preparation for photographing is completed, the tip claw 42d of the lever 42 engages with the pin 54 to move the lever 35 to the right in the drawing, and pulls it out of the holes 22b, 32b, 34a.
Reference numerals 64 and 65 denote projections integrally formed on the lower surface of the pull lid 5. The projection 64 presses the end 40 a of the lever 40 to rotate the lever 40 when returning the pulled lid 5 once pulled out. . The projection 65 engages with the bent portion 56b after the preparation for photographing is completed, so that the lid 5 and the slide frame 22 are integrally pulled out from the holder main body 19a.

As shown in FIG. 3, the pack holder 19
The lid 21 having the photographing opening 23 is the exposure frame 6 of the large format camera.
7, and therefore, on the upper surface of the lid 21, ridges 21 b and 21 c for positioning are provided. Reference numeral 68 denotes a knob operated when the lid 21 is opened. Reference numeral 69 denotes a telemp for preventing external light from entering through a gap between the sliding contact surface on which the slide frame 22 slides and the inner wall surface of the holder body 19a. In FIG. 1, reference numeral 70 denotes a lid lock dial for locking the lid 5 of the film pack 1 to the slide frame 22 for safety when carrying the film pack 1 loaded in the pack holder 19. In addition, the circular peripheral end is engaged with the slit 5e of the sliding lid 5 by manual rotation operation. Although not shown, a counter display window 3h of the holder body 19a and the slide frame 22 is provided.
A window for observing the number of shots is formed at a position corresponding to.

The operation of the above configuration will be described. When the film pack 1 is not loaded in the pack holder 19, the claw portion 50b of the lever 50 is connected to the hole 31a of the box portion 31.
However, as shown in FIG. 4, the receiving portion 46a of the locking lever 46 is at a position where it does not engage with the projection 50a, and the locking of the lever 42 is not accidentally released. Also, the lever 40 is not rotated since the end 40a is in contact with the projection 64. When the film pack 1 is loaded into the pack holder 19 and the lid 21 is closed, the ridges 27
c and the cap 2 is held between the holder body 16 and the lid 21 (see FIG. 3). Then, the projections 7e and 7f are pushed down by the projection 28, and the claw member 7 is moved downward, and the claws 7a and 7b are disengaged from the locking holes 5b and 5c of the lid 5, so that the lock of the lid 5 is released.

Insert the pack holder 19 into the exposure frame 6 of the large format camera.
7, after the lid 5 starts to be pulled out, the regulation by the projection 64 is released as shown in FIG.
0 is rotated, and the receiving portion 46a is moved to a position where it can be engaged with the projection 50a. When the lid 5 is pulled out and moved to the position shown in FIG. 8, the opening 3a of the pack body 3 is fully opened, and the first sheet film unit 4a is
Pushed up by 2. Then, the sheet film unit 4a passes through the opening 3a, and is moved to a photographing position pressed against the receiving surface 24 of the pack holder 19. At this time, as shown in FIG. 6, the claw portion 50b is engaged with the locking hole 5c.
When the user pulls the lid 5 slightly, the lid 5 cannot be pulled out any further. As shown in FIG. 4, the slide frame 22 and the lever 32 are locked to the holder main body 19 a by the lever 35, and the slide frame 22 and the lever 32 are not moved by the pulling-out operation of the lid 5.

As described above, when the lid 5 is further pulled out after the claw portion 50b is engaged with the locking hole 5c, the lever 5
0 is rotated clockwise, and the projection 50a pushes down the receiving portion 46a to rotate the locking lever 46 counterclockwise.
As a result, the lock of the lever 42 is released, and as shown in FIG. 9, the lever 42 is moved toward the lever 35 by the bias of the spring 44, and the tip claw 42d is engaged with the pin 54.

Next, when the lid 5 is returned to the original position, FIG.
As shown in FIG. 7, the lid 5 enters between the first sheet film unit 4a and the second sheet film unit 4b, and the sheet film unit 4a located at the photographing position.
Is secured. At this time, as shown in FIG. 11, since the projection 64 presses the end 40a, the lever 40 is rotated clockwise. And the lever 42 is the lever 4
The pin 35 is pressed rightward in the drawing by the tip claw 42d, and the lever 35 is moved rightward and pulled out of the holes 22b, 32b, 34a.
At the same time, the lever 55 is rotated clockwise by the pin 55, a shooting preparation completion signal is displayed by the section 59 in the window 61 a, and the bent portion 56 is
b is arranged. By opening and closing the shutter of the large format camera in this state, the first sheet film unit 4a is exposed.

After the first photographing operation is completed,
When the handle 5a is gripped and pulled, the projection 65 is engaged with the bent portion 56b, and the lid 5, the pack body 3, the slide frame 22, and the lever 32 are integrally pulled out from the pack holder 19,
As shown in FIG. 12, only the cap 2 is the pack holder 1
9 is left behind. At this time, the edge of the receiving surface 24 causes the photographed first sheet film unit 4
Since a is locked at the same position, the sheet film unit 4a comes out of the pack body 3 through the gap between the upper part of the partition 3d and the receiving surface 24. The sheet film unit 4a that has come out of the pack body 3 is pushed into the bottom of the holder body 19a by the spring 26.
Since the lid 5 closes the opening 3 a of the pack body 3, even if the film pack 1 is pulled out from the pack holder 19, the sheet film unit 4 in the pack body 3 is removed.
Outside light does not reach the surface.

When the pack body 3 is pulled out to the position shown in FIG. 12, the pin 73 fixed to the lever 32 contacts the end of the plate 34 as shown in FIG.
2 is displaced from the slide frame 22, and the pin 36 is relatively moved to the lever 35 side. Thus, the counter feed lever 37 is rotated clockwise in preparation for the counter feed. At this time, even if the counter feed claw 37b may slightly contact the teeth 6b of the counter display plate 6, the counter display plate 6 may be displaced because the lower end 11a of the holding spring 11 is in contact with the claw 6a. Clockwise rotation is prevented. At the same time, the pin 62 engages with the claw portion 42c and presses it downward in the drawing, so that the lever 42
Since the lever 42 is returned to the initial position against the urging of the lever 4, the lever 42 is locked by the locking lever 46.

Thereafter, when the film pack 1 is pushed into the holder body 19a together with the slide frame 22 while holding the handle 5a, the left end of the sheet film unit 4a is regulated by the bending plate 9 as shown in FIG. Therefore, the sheet film unit 4a enters the pack body 3 through the collection port 10 which is a gap between the lower portion of the partition 3d and the inner surface 3e of the rear surface, and gets on the pressure plate spring 12, and the unexposed sheet film unit 4 It is inserted at the bottom layer.

When the film pack 1 is completely inserted into the holder main body 19a in this manner, as shown in FIG. 14, the bent portion 32a comes into contact with the end face of the leg 21a, and the lever 32 is returned to the initial position. Therefore, the pin 36 also returns to the initial position. As a result, the counter feed lever 37 is rotated counterclockwise, so that the counter feed pawl 37b is engaged with the teeth 6b, and the counter display plate 6 is rotated by one tooth. As a result, the next display number “2” is displayed in the counter display window 3h, the section 59 is retracted from the window 61a, and the locking of the lid 5 by the bent portion 56b is released. Since the holes 22b, 32b, and 34a overlap in a straight line, the lever 35 is inserted into these holes, and the slide frame 22 is locked to the holder body 19a.
3 and 4 except that the second sheet film unit 4b is located immediately below the lid 5. As shown in FIG. Hereinafter, by repeating the same operation, the photographing can be performed one after another. Note that the number of shots displayed in the counter display window 3h can be observed through windows formed in the holder body 19a and the slide frame 22.

When the seventh sheet film unit 4 is photographed by repeating the above-described procedure, and the film pack 1 is pulled out and inserted, the photographed sheet film units 4 are placed in the pack body 3 in the photographing order. And the opening 3a is covered with the lid 5 (see FIG. 3).
It has become. When all the photographing operations are completed for one film pack 1 in this manner, the end mark “E” is displayed in the counter display window 7h and the holding plate 11 is pushed up, so that the upper end 11c is engaged with the locking hole 5f. Thus, the pull-out operation of the lid 5 is prevented. At the same time, the lid 21
The lock release mechanism (not shown) is operated to release the lock of the lid 21, and the lid 21 is rotated while operating the knob 68 in order to remove the used film pack 1.

Since the pressing of the projections 7e and 7f by the projection 28 is released with the rotation of the lid 21, the pawl member 7 is raised by the urging of the springs 7c and 7d, and the pawls 7a and 7b are brought into the engagement holes 5b. , 5c and the cap 2 and the lid 5 are connected. On the other hand, since the projection 5 d of the lid 5 is engaged with the end of the pack body 3, the cap 2 is locked to the pack body 3. Then, since the pressing of the cap 2 by the ridge portion 27 is released, the used film pack 1 can be taken out. In the state shown in FIG.
To open the lid 21 to open the film pack 1.
Can be exchanged, so that, for example, monochrome shooting and color shooting can be alternately performed during shooting. At this time, since the counter display plate 6 is stopped while displaying the number of shots, the film pack 1 can be replaced with ease.

[0036]

As described above in detail, according to the film pack and the pack holder of the present invention, the complicated counter feed mechanism is provided on the pack holder side, and the film pack is provided with only the display portion of the counter. Therefore, the cost of the film pack can be reduced, and the cost of the entire system can be reduced. In addition, since the number of shots is displayed on the film pack, the film pack can be replaced during shooting. In addition, since the cost of the film pack is reduced, a large number of film packs can be carried, and the used film pack can be submitted to the laboratory as it is. No need for troublesome work.

[Brief description of the drawings]

FIG. 1 is an external view of a film pack and a pack holder.

FIG. 2 is an exploded perspective view showing the structure of the film pack.

FIG. 3 is an essential part end view showing a pack holder and a film pack in an initial state.

FIG. 4 is an explanatory diagram showing structures of a latch mechanism and a counter feed mechanism, and showing their initial states.

FIG. 5 is an end view of a main part showing the latch mechanism in an initial state from the side.

FIG. 6 is an essential part end view showing the latch mechanism in a state where the lid is pulled out from the side.

FIG. 7 is an explanatory view showing a latch mechanism and a counter feed mechanism in a state where the pulling lid is started to be pulled.

FIG. 8 is an essential part end view showing the pack holder and the film pack in a state where the lid is pulled out from an initial state.

FIG. 9 is an explanatory diagram showing a latch mechanism and a counter feed mechanism in a state where the lid has been pulled.

FIG. 10 is an essential part end view showing a pack holder and a film pack during photographing.

FIG. 11 is an explanatory view showing the latch mechanism and the counter feed mechanism in a state where the lid has been returned.

FIG. 12 is an essential part end view showing the pack holder and the film pack in a state where the film pack is drawn out after photographing.

FIG. 13 is an explanatory view showing the latch mechanism and the counter feed mechanism in a state where the slide frame has been pulled.

FIG. 14 is an explanatory diagram showing the latch mechanism and the counter feed mechanism immediately after returning the slide frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film pack 2 Cap 3 Pack main body 3h Counter display window 4 Sheet film unit 5 Pull lid 5b, 5c, 5f Locking hole 6 Counter display plate 11 Holding plate 19 Pack holder 19a Holder main body 20 Hinge 21 Lid 22 Slide frame 22b, 32b , 34a holes 32, 35, 40, 42, 50, 56 levers 32a, 56b bent portions 36, 54, 55, 62 pins 37 counter feed levers 42b, 42c claw portions 42d tip claws 46 locking levers 46a receiving portions 50a, 64 , 65 protrusion

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03B 17/26 G03B 17/32 G03B 17/34 G03B 17/36

Claims (3)

(57) [Claims] 1. A pack body for stacking and storing a plurality of sheet film units, an opening formed in a front wall of the pack body to expose an uppermost sheet film unit, and slidably incorporated in the pack body. And a counter lid provided to open and close the opening, and a counter display plate movably provided in the pack main body and stepped by receiving a mechanical displacement signal from outside the pack main body. pack. 2. A pack storage unit for storing the film pack according to claim 1, and a reciprocating movement operation of the film pack performed for each photographing or a reciprocating movement operation of the pull lid performed for each photographing. A pack holder, comprising: a counter feed mechanism that performs one mechanical displacement in conjunction with the film to advance the counter display plate provided on the film pack. 3. A film pack in which a plurality of sheet film units are stacked and housed, and a counter display plate which is stepped and moved by receiving a mechanical displacement signal from outside the pack body is provided. A pack holder having a built-in counter feed mechanism for giving a mechanical displacement signal to the counter display plate in conjunction with one reciprocal sliding operation of the film pack loaded with the pack and performed for each photographing. Film pack and pack holder.