JPH02113240A - Film cartridge - Google Patents

Abstract

PURPOSE:To smoothly transfer a film without allowing a sloped edge to be arrested by an exposing aperture by forming the sloped edge to the front end of the film from one side part to the other side part. CONSTITUTION:Perforations 26a are formed longitudinally to at least one transverse side part of the film 26 and the sloped edge 26b sloped from one side part formed with the perforations 26a to the base end part wide of the other side part is provided to the front end part 26c of the film 26. The cost is reduced in this way without requiring special mechanisms and the front end 26c of the film is prevented from being arrested by the exposing aperture at the time of transferring the film.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a film cartridge that smoothly transports a film during film transport.

BACKGROUND OF THE INVENTION A conventional 135-inch film cartridge has a stepped portion having a width approximately halved at its leading edge, and its leading edge is formed perpendicular to the longitudinal direction of the film.

With the above configuration, when the cartridge is stored in a camera, when the leading edge of the film is transferred from the film cartridge chamber to the film chamber through the exposure opening, the leading edge of the film may be caused by curling, etc. In some cases, the film could not be transferred to the film room due to the film getting caught in the film.

As a solution to this problem, a
A rotating support plate forming a part of the exposure aperture is provided, and when the leading edge of the film passes through during loading of the film, the supporting plate rotates due to the curling abutment of the leading edge,
A structure has been proposed in which the leading end of the film is allowed to pass through, and after the leading end passes through, it returns to form a part of the opening again (Japanese Patent Application Laid-Open No. 109933/1982).

Problems to be Solved by the Invention However, with the structure described above, it is necessary to provide a special rotary support plate in the exposure aperture in order to allow the leading end of the film chamber to pass through, which poses the problem of increasing costs. Ta.

Therefore, an object of the present invention is to solve the above-mentioned problems, and it is possible to reduce costs without requiring a special mechanism, and to prevent the leading edge of the film from getting caught in the exposure aperture when transporting the film. Our goal is to provide a film cartridge that never fails.

Means for Solving the Problems In order to achieve the above object, the present invention is configured such that an inclined edge that is inclined from one side toward the other side is formed at the leading end of the film. That is, in a film cartridge including a winding shaft for winding a film, and a case having a film entrance and exit and housing the film wound on the winding shaft in a light-shielded state, at least one side in the width direction of the film is provided. The film has a perforation formed along the longitudinal direction in the film, and an inclined edge that is inclined from one side where the perforation is formed to the proximal end of the other side at the distal end of the film.

In the above structure, the perforations may be formed on both sides of the film in the width direction.

In the above structure, the inclined edge may extend from one side of the film to the other side.

In the above structure, the angle of inclination of the inclined edge may be 40 to 70 degrees with respect to the film transport direction.

Moxibustion absorption Δ乍1 In the above configuration, when the film is transferred from the film cartridge chamber to the film chamber, the tip of the film has a sloped edge with a small portion perpendicular to the transfer direction, and the exposure opening has the sloped edge. The edges are less likely to get caught.

Effects of the Invention According to the above configuration, since the inclined edge is formed at the leading end of the film from one side toward the other side, the inclined edge hardly gets caught in the exposure aperture, and the film can be transferred smoothly. be able to. That is, since the leading end of the conventional film had a tightening in the direction perpendicular to the transport direction, it was easily caught in the exposure aperture, and the film could not be transported smoothly. Further, according to the above configuration, the film can be smoothly transferred without requiring a special mechanism, so that costs can be reduced.

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 4.

The film cartridge 39 according to this embodiment has the first.
As shown in Figure 2, the film 26 in an unused state
The film winding shaft 22 and the sprocket 23 have a film winding shaft 22 wound thereon, a sprocket 23 that rotates by engaging with the perforation gin 26a of the film 26, and a film inlet/outlet 25. The film 26 is generally composed of a case 21 which is housed in a rotatable manner in close proximity to each other and a case 21 which houses the film 26 in a light-shielded manner.

As shown in FIG. 3, the film 26 in the film cartridge 39 forms a perforation 26a that engages with the engagement pawl of the sprocket 23 only along one side in the width direction, that is, along the upper edge of the film 26. do. Moreover, in the tip portion 26c of the film 26,
In FIG. 3, the other side of the film 26, that is, the lower edge side, is cut out diagonally, and the inclined edge 26 is greatly inclined from near the upper edge to the lower edge toward the base end of the film.
form b. The angle of inclination of the inclined edge 26b is preferably 40 to 70 degrees with respect to the film transport direction.

A light shielding member (terremp) 27 having flexibility and shielding the film entrance/exit 25 from light is provided inside the case 21 along the film entrance/exit 25 .

When the film 26 is sent out of the case 21 by the sprocket 23, the light shielding member 27 is pushed and bent to the outside of the film entrance/exit port 25 by the leading end 26C of the film 26. In the unused state of the film 26, the perforations 26a of the tip 26c of the film 26 are engaged with the engagement claws of the sprocket 23;
6c does not protrude to the outside from the film entrance/exit port 25.

On the other hand, two large and small openings 21a and 21b are formed in the upper end surface of the case 21 in FIG.
The first engaging portion 22a at the upper end of the sprocket 23 is exposed, and the second engaging portion 23a at the upper end of the sprocket 23 is exposed at the smaller opening 21b. The first engaging portion 22a can be engaged with a film winding drive member (not shown) of the camera body 31, and the second engaging portion 23a can be engaged with a film feeding drive member (not shown) of the camera body 31. It is possible to engage with

Further, on the side surface of the case 21, film data 21d indicating the number of photographable frames and film sensitivity of the film 26 stored in the case 21 is recorded.

The number of frames that can be photographed is recorded, for example, in a microcomputer within the camera body as the total number of perforations 26a formed at the upper edge of the film 26.

A camera that can use the film cartridge 39 described above is shown in FIGS. 3B and 4. FIG. 3B shows that the film cartridge 39 is loaded into the film cartridge storage chamber 40 from the bottom of the camera body 31, for example.
In addition, a conceptual diagram of the camera in a state in which the leading end 26c of the film 26 is fed out from the film entrance/exit 25 is shown.

In the figure, 32 is an autofocus block, 33 is a finder block, 34 is a flash, 35 is a flashlight emitting condenser, 36 is a battery, 37 is a film chamber, 41 is a spool, and 38 is an aperture (exposure opening).

In the camera having the above configuration, when the film cartridge 39 is loaded into the film cartridge storage chamber 40, the first engaging part 22a becomes the film winding drive member, and the second engaging part 23a becomes the film delivery drive member. The feeding and winding operations of the film 26 are automatically performed under the control of a microcomputer built into the camera body. That is, when the film cartridge 39 is stored in the camera body, the film feeding drive member is driven to rotate the sprocket 23 and automatically feed the film 26 from the film cartridge 39.
is sent out. When the leading end 26c of the film 26 is sent out from the film inlet/outlet 25 of the case 21 of the film cartridge 39, the leading end 26C of the film 26 has an inclined edge with respect to the exposure opening 38 having an edge perpendicular to the transport direction. The film 26 is smoothly transferred to the film chamber side without being caught by the film 26b, and after being transferred to the film chamber side by a predetermined amount, the leading end 26C of the film 26 is wound around the circumferential surface of the spool 41 in the film chamber. Thereafter, the film 26 is fed out one frame at a time from the film cartridge 39 for each photographing operation and wound onto the spool 41. On the other hand, after photographing is completed, the film 26 in the film chamber 37 is automatically wound onto the winding shaft 22 in the film cartridge 39 by driving the film winding drive member.

FIG. 4.5 shows a camera that more embodies the camera shown in FIG. 3, and the camera body 3! Open the lid LD provided on the bottom surface of the camera body 31 of the cartridge storage chamber 40 inside, and insert the film cartridge 39 according to this embodiment into the cartridge storage chamber 40 through the film cartridge entrance 43 opened on the bottom surface of the camera body 31. Indicates the state in which you are about to store it. Further, FIG. 6 shows a state in which a film cartridge 39 is housed. At the upper end of the cartridge storage chamber 40, a first fork 130 as a film winding drive member of the camera body 31 and the camera body 3! A second fork 131 serving as a film delivery drive member respectively protrudes downward, the first fork +30 is connected to the first engaging portion 22a of the film cartridge 39, and the second fork 131 is connected to the first engaging portion 22a of the film cartridge 39. are respectively engaged with the second engaging portions 23a.

In addition, in FIG. 4, L indicates a lens.

FIG. 7 shows the first fork 130 and the second fork 13.
1 shows a take-up drive unit and a delivery drive unit that drive the drive unit 1, respectively. As shown in FIGS. 4 and 7, a motor lot is provided in the spool 41, which operates when the film 26 is fed out, wound up, and taken up.
The motor IO1 rotates a gear 103 and a gear 107 fixed to the camera body 31 via a reduction gear 102.

The gear 103 has a carrier plate I05 rotatably fixed at one end to the center axis P, and a carrier plate I05 rotatably supporting the planet gear 104 at the other end. gear! 04 and interlock with each other. The planetary gear 104 is arranged close to a gear 106 that rotates the spool 41. Therefore, when the gear 103 rotates counterclockwise in FIG.
The planetary gear 1 rotates counterclockwise in Fig. 7 with
04 meshes with the gear 106. Conversely, when the gear 103 rotates clockwise in FIG. 7, the carrier plate 105 and the planet gear 104 rotate clockwise in FIG. 7 about the axis P1, and the planet gear 104 rotates clockwise in FIG. The above gear! It is now moving away from 06.

Further, the gear 107 includes a carrier plate 108 that has one end rotatably fixed to the center axis P2 and a carrier plate 108 that rotatably supports the planet gear 109 on the other end, and the gear 107 and the planet gear They mesh with the gear 109. The planetary gear 109 is arranged close to the gear 11O that rotates the sprocket 23 and the gear Ill that rotates the fibrem take-up shaft 22. Therefore, the above gear! 07 rotates counterclockwise in FIG. 7, the carrier plate lO8 and the planetary gear 109 both rotate counterclockwise in FIG. They are designed to interlock. Conversely, when the gear 107 rotates clockwise in FIG. 7, the carrier plate 108 and the planetary gear 109 rotate clockwise in FIG. 7 about the axis P, and the planetary gear 109 rotates clockwise in FIG. The above gear! ! It is designed to mesh with 1.

Also, the above gear! A sprocket rotation amount detection circuit RD is provided between the sprocket 10 and the sprocket 23, which generates a predetermined number of pulses according to a predetermined rotation amount of the sprocket 23.

The first fork 130 and the gear 111 are connected to rotate together. Above 1st fork 1
A coil spring 132 is compressed between the gear I11 and the gear I11, and the first fork 130 can be retracted to the gear 111 side. Therefore, the film cartridge 39 is placed in the cartridge storage chamber 4 of the camera body 31.
0, if the first fork 130 is positioned so as to engage with the first engaging portion 22a of the film cartridge 39, it will engage immediately, and if the rotational direction positions of the two coincide. If not, the two do not engage, and the second fork 130 is retracted against the biasing force of the coil spring 132. In this case, when the positions in the rotational direction match due to relative rotation between the two, the first fork 130 is projected by the urging force of the coil spring 132 and the two are engaged.

Also, the second fork above! What is 3ri and the gear IfO mentioned above?
They are connected to rotate together.

A coil spring 133 is compressed between the second fork tat and the gear 110, so that the second force 131 can be retracted to the gear 110 side. Therefore, when the film cartridge 39 is stored in the cartridge storage chamber 40, if the second fork 131 is in a state where it can engage with the second engaging portion 23a of the film cartridge 39, the two engage with each other. If the rotational direction positions of both do not match, they cannot engage, so the second fork! 31 retreats against the biasing force of the coil spring 133.

Thereafter, when the positions in the rotational direction match due to relative rotation between the two, the second fork 1 is
31 protrudes and the two engage.

The operation of the camera using the film cartridge 39 according to this embodiment is controlled by a microcomputer COM as shown in FIG. Microcomputer C
The following circuits and devices are connected to the OM. That is, a film data circuit FD for reading film data 21d recorded on the side surface of the film cartridge 39, and a sprocket rotation amount detection circuit for detecting the amount of rotation of the sprocket 23 and outputting a signal corresponding to the number of rotations. RD, photometry circuit ML that measures subject brightness
, an autofocus control circuit AP that measures the distance to the subject and drives the lens L, a display device DS that displays various states of the camera, a flash device FC that includes a cannon tube and emits flash light, and an aperture for shooting. and an exposure control device EC that drives the shutter, and a motor control circuit MD that controls the motor 101 in the spool 41.
, a power supply 36, a cartridge detection switch SQ that closes when the film cartridge 39 is stored in the cartridge storage chamber 40, and a cartridge storage chamber 40.
Lid detection switch Ss that closes when the lid LD is closed
, a switch S lq which is closed by pressing the first stage of a two-step push-down type shirt release button, and a switch S which is closed by pressing the second stage of the shirt release button which is further pushed in from the first stage pressed state. In addition, the above switch S
s may be closed when the lid LD having a locking mechanism is locked.

The following describes the initial setting operation, initial winding operation, photographing operation, film winding operation, and film winding operation of the camera controlled by the microcomputer COM.

(Initial Setting Operation) When the film cartridge 39 is stored in the cartridge storage chamber 40, the power source 36 is turned on, and an initial setting operation as shown in FIG. 9 is performed. That is, when the power source 36 is turned on, step 5IOf
In step 5102, each input/output terminal and memory circuit are set to the initial state, and then in step 5102, the film data circuit FD reads the film sensitivity, the number of frames that can be photographed, etc. from the film data 21d of the film cartridge 39, and then in step After allowing the interruption of other operations in step 5I03, the above-mentioned initial setting operation is ended in step 5104. In step 5lot, the final piece flag, which will be described later, is set to the initial state.

(Initial winding operation) When the film cartridge 39 is stored in the cartridge storage chamber 40, an initial winding operation as shown in FIG. 1O is performed following the initial setting operation.

That is, the film cartridge 39 is stored in the cartridge storage chamber 40 and the cartridge storage chamber 40 is
When the above-mentioned 11LD is closed, both the above-mentioned cartridge detection switch Sg and the above-mentioned lid detection switch Ss are closed, so that the switches S12 and S are closed as shown in FIG.
The OR circuit ORI connected to s outputs a low signal. Then, a high signal is output for a predetermined period of time from the circuit O6 connected to the OR circuit ORI. As a result, a low signal is input from the inverter INV connected to the circuit O8 to the interrupt terminal lNTl of the microcomputer COM, and as shown in FIG.
In step 1, interrupts from other operations are prohibited. Next, in step 5202, the motor 101 starts rotating in the normal direction, and then in step 5203, a timer is set.

When the motor 10I is rotated forward in step 5202, the rotation is controlled by the reduction gear! 02 to the gear 103, and the gear 103 rotates once counterclockwise in FIG. 7 about its axis P. the result,
The planetary gear 104 of the gear 103 rotates clockwise in FIG. 7 about its axis P, and the carrier plate 1
05 rotates counterclockwise in FIG. 7 about the central axis P+ of the gear 103, and the planetary gear 104 in FIG. 7 comes to mesh with the gear 106 disposed adjacently above. Therefore, the gear 106 rotates counterclockwise in FIG. 7, and the rotation is transmitted to the spool 41, which in turn rotates counterclockwise in FIG.

Similarly, the rotation of the motor 101 is also transmitted to the gear 107 via the reduction gear 102.
rotates counterclockwise in FIG. 7 around its sleeve P. As a result, the planetary gear 109 of the gear 107 has its axis P
The carrier plate 108 rotates counterclockwise about the central axis P of the gear 107, and the planetary gear 1 rotates clockwise in FIG.
09 comes to mesh with the gear 110 disposed adjacently above. Therefore, the gear 110 rotates counterclockwise in FIG. 7, and the rotation is transmitted to the sprocket 23, which in turn rotates counterclockwise in FIG. Then, the perforation 2 at the leading end of the unused film 26 in the film cartridge 39
6a is engaged with the engagement pawl of the sprocket 23,
As shown in FIG. 3, the film 26 is fed out from the film opening 25 of the case 21 of the film cartridge 39. Thereafter, when the leading end of the film 26 is fed along a film rail or the like appropriately formed in the camera body 31 and reaches the spool chamber 37, the perforation 26a at the leading end of the film 26 It engages with an engaging claw (not shown) formed on the circumferential surface of the upper end of the spool 41 in FIG. Accordingly, a mechanism for pressing the leading end of the film against the spool may be provided in the spool chamber.

On the other hand, when the sprocket 23 starts to rotate due to the rotational drive of the motor 101, the sprocket rotation amount detection circuit RD outputs a number of pulses corresponding to the rotation amount of the sprocket 23, and in step 5204, the microcomputer COM The above number of pulses is counted.

Next, in step 5205, the above step 520
It is determined whether or not the timer set in step 3 has ended, and if it is determined that it has not ended, in step 8208, the timer set in step 5204 is determined to determine whether the number of pulses counted in step 5204 has reached a predetermined number A. Determine whether or not.

If it is determined in step 820B that the number of pulses has reached the predetermined number A, that is, if it is determined that the film 26 has been sent out by a predetermined amount from the entrance/exit 25 of the case 21, step 5209 is performed. After stopping the motor lO1, step 52
At step 10, the display device DS displays that the film cartridge 39 has been properly stored in the cartridge storage chamber 40, the film 26 has been normally wound, and the initial winding operation has been performed. Next, in step 5211, interruption of other operations is permitted, and in step 5212, the above-mentioned initial winding operation is ended.

If it is determined in step 8208 that the number of pulses has not reached the predetermined number A, the process returns to step 5204.

Further, if it is determined in step 5205 that the timer has ended, that is, some abnormality has occurred, and the film 26 is removed within the predetermined time in the case 2.
If it is determined that the predetermined amount of film has not been fed out from the film entrance/exit port 25 of No. 1, the motor 101 is stopped in step 8206, and then an abnormal state is displayed on the display device DS in step 5207, and then the process is performed in step 5211. Proceed to.

(Photographing operation, film winding operation, film winding operation) The photographing operation, film winding operation, and film winding operation are performed as shown in FIGS. 11A and 11B. When the switch S is closed by pressing the first stage of the shirt release button, the interrupt terminal INT is connected as shown in FIG.
An interrupt signal is input to 2. Then, step S3
At step 01, interruption of other operations is prohibited, then at step 5302 the subject brightness is measured, and then at step 5303 the subject distance is measured. Next, in step 5304, the above step 5
Based on the measurement results at 302 and 5303 and the film sensitivity obtained in the above-mentioned initial setting operation, it is determined whether or not the flash 34 is to be emitted and an exposure control value is calculated.

Next, in step 5305, it is determined whether the switch S is closed, that is, it is determined whether the shirt release button has been pressed down to the second stage, and the shirt release button is pressed down to the second stage. If it is determined that it has not been pressed, it is determined in step 5306 whether the switch S1 remains closed, that is, whether the shirt release button remains pressed to the first step. .

If it is determined in step 8306 that the shirt release button remains pressed down to the first stage, the process returns to step 5302.

That is, in this case, it is determined that the camera is in a standby state ready for photographing, so steps 5302 to 5305 and 5306 are performed until it is determined in step 5305 that the shirt release button has been pressed to the second level. repeat.

Further, if it is determined in step 5306 that the shirt release button has not been pressed down to the first stage, it is determined that the operation has been canceled, and step 530
After allowing the interruption of other operations in step 7, step 53
At 34, the photographing operation is stopped.

If it is determined in step 5305 that the shirt release button has been pressed to the second level, in step 5308 the lens L is driven to a position corresponding to the subject distance via the autofocus control circuit AF, Next, in step 5309, it is determined whether or not the driving of the lens L has been completed. If it is determined that the driving of the lens L has not been completed, the process waits until the driving of the lens L is completed.

If it is determined in step 5309 that the driving of the lens L is completed, in step 5310 the shutter device (not shown) is caused to perform an exposure operation (photographing operation) via the exposure control device EC, and as necessary. In response, the flash device FC is operated to cause the flash 34 to emit light. After the exposure operation, step 5311
At this point, the final frame flag is checked to determine whether or not the film 26 is the final frame.

If it is determined in step S3+1 that this is not the last frame of the film 26, the motor 101 is started to rotate forward in step 5321, and then a timer is set in step 5322. When the motor 101 is rotated forward in step S321, as described above, the sprocket 23 and the spool 4
1 rotates counterclockwise in FIG. 7, the film 26 is sent out from the film opening 25 of the case 21 of the film cartridge 39 and is wound onto the spool 41. When the sprocket 23 starts to rotate, the sprocket rotation amount detection circuit RD outputs a number of pulses corresponding to the rotation amount of the sprocket 23, and the number of pulses is counted in step 5323.

Next, in step 5324, the above step 5322
Determine whether the timer set in has ended,
If it is determined that the process has not finished, step 5327
In step 5323, it is determined whether the number of pulses counted in step 5323 has reached a predetermined number B corresponding to the winding amount for one frame of the film 26.

If it is determined in step 5327 that the pulse number has not reached the predetermined number B, the process returns to step 5323.

If it is determined in step 5327 that the number of pulses has reached the predetermined number B, that is, if it is determined that the film 26 has been wound onto the spool 41 by one frame, then in step 5328 Motor 101 is stopped.

Next, in step 5329, it is determined whether or not one frame remains among all the frames of the film 26 other than the frames that have already been photographed. That is, it is determined whether or not it is the final frame based on the total number of pulses from the time of loading the film, and if it is determined that it is not the final frame, winding of the film 26 for one frame is completed in step 5331. The information, number of photographed frames, etc. are displayed on the display device DS, and then, in step 5332, interruption of other operations is permitted, and then, in step 5333, the film winding operation is ended.

Also, in step 5329, the film 26
If it is determined that the piece has become the final piece, step 5
After setting the final piece flag in step 330 to indicate that the remaining pieces are the final pieces, the process proceeds to step 5331 described above.

On the other hand, in the step 5324, the step 5
If it is determined in step 322 that the set timer has ended, that is, if it is determined that some abnormality has occurred and the film 26 has not been wound up by one frame, the motor lot is stopped in step 5325. , then in step 8326 the display device D
After displaying a warning on S, the hoisting operation is terminated in step 8333.

Incidentally, after a warning is displayed on the display device DS in step 8326, a winding operation to be described later may be performed.

Further, in step 5311, the final frame flag is set to indicate that the remaining frames are the final frames, and the photographing of the final frame of the film 26 has been completed. If it is determined that the film winding operation is started, the motor 101 is started to rotate in the reverse direction in step S3!2, and then a timer is set in step 5313. In step 5312, the motor 101
When is reversed, the rotation is transmitted to the gear +03 via the reduction gear 102, and the gear 103
, rotates clockwise in FIG. 7 around . As a result, the planetary gear +04 rotates counterclockwise in FIG. 7 about its axis P, and the carrier plate +04 rotates counterclockwise in FIG. 05
rotates clockwise around the central axis P of the gear 103, and the planetary gear +04 separates from the gear 106. Similarly, the rotation of the motor 101 is also transmitted to the gear 107 via the reduction gear 102.
07 rotates clockwise in FIG. 7 about its axis P. As a result, the planetary gear 109 rotates counterclockwise in FIG. The gear 109 is separated from the gear 110 and meshes with the gear 12 disposed adjacent to the lower part of the rod 7 in FIG. Therefore, gear 111
rotates clockwise in FIG. 7, and this rotation is transmitted to the film winding shaft 22, which in turn rotates clockwise in FIG. Then, the film 26 is wound onto the film winding shaft 22. Furthermore, since the engaging pawl of the sprocket 23 engages with the perforation 26a of the film 26, the film 26 is engaged with the perforation 26a of the film 26.
6 is wound up on the film winding shaft 22, it freely rotates clockwise in FIG.

Then, the sprocket rotation amount detection circuit RD outputs a number of pulses corresponding to the rotation amounts of the sprockets 2 and 3, and the number of pulses is counted in step 5314.

Next, in step 5318, the above step 531
It is determined whether or not the timer set in Step 3 has ended. If it is determined that the timer has not ended, in Step 5315, the pulse scattering counted in Step 5314 is changed by normal rotation of the motor 101. It is determined whether a predetermined number C corresponding to the amount of the film 26 wound onto the spool 41 has been reached.

In step 5315, the number of pulses is set to a predetermined number C.
If it is determined that the value has not been reached, step 531
Return to 4.

If it is determined in step 5315 that the number of pulses has reached the predetermined number C, that is, the film 26
If it is determined that all of the film 26 has been rewound into the film cartridge 39, the motor 101 is stopped in step 5316, and then, in step 5317, the display device DS indicates that the winding of the film 26 has been completed. After displaying, in step 5333, the film winding operation is ended.

Note that after it is determined in step 5315 that the number of pulses has reached the predetermined number C, the motor 1
01 for a predetermined period of time, the engagement between the film 26 and the engaging pawl of the sprocket 23 is released, and the film 26 up to the leading end is wound onto the film winding shaft 22. good.

Further, in the step 531B, the step 5
If it is determined that the timer set in step 313 has ended, that is, if it is determined that due to some abnormality, the film 2G is not completely wound onto the film winding shaft 22 even after a predetermined period of time has elapsed. In step 5319, the motor 101 is stopped, and then, in step 5320, a warning is displayed on the display device DS, and then in step 5333, the winding operation is ended.

According to the above embodiment, since the inclined edge 26b is formed at the tip end 26c of the film 26 from one side toward the other side,
Exposure aperture 38 having an edge perpendicular to the film transport direction
The inclined edge 26b is hardly caught by the
The film 26 can be transferred smoothly. That is, the leading edge of a conventional film has an edge in a direction perpendicular to the film transport direction, and this edge easily gets caught on the edge of the exposure aperture perpendicular to the film transport direction, making it difficult for the film to be transported smoothly. I was unable to do so.

Further, according to the above configuration, since the camera uses the film cartridge 39 which consists only of the part that stores the film, the space for storing the film exposure support part and the space for storing the spool chamber in the 110-inch film cassette are reduced. This eliminates the need for extra space behind the lens L or in the spool chamber, imposes no major restrictions on the design of the camera, and imposes no major restrictions on the format or type of the camera.

In addition, the film cartridge 39 consists only of the part that stores the film, and does not require the same amount of space behind the lens or in the spool chamber as the conventional 135-inch film cartridge, so it is more spacious overall than the conventional 110-inch film cartridge. The film cartridge storage chamber 40 can be made smaller. Furthermore, since the film cartridge 39 does not become too bulky compared to the conventional 110-inch film cartridge, the size of the opening 43 for inserting and removing the film cartridge of the camera using the film cartridge 39 has been adjusted to the size of the +10-inch film cartridge. The size of the opening for inserting and removing the cartridge can be made smaller than that required for a camera using a cartridge.

Further, the film cartridge 39 is connected to the film 2.
6 to the spool chamber side, the user only needs to store the film cartridge 39 inside the camera body 31, and the user only has to store the film cartridge 39 into the camera body 31
In the film feeding operation from 9, the sprocket 23 is driven by the feeding drive section in the camera body, and the film 26 is automatically fed from the film cartridge 39 to the spool chamber and engaged with the spool 41. be done. Therefore, the user must
9 in the camera body, and there is no need to perform any film length adjustment work such as pulling out the film 2B from the film cartridge 39, or any work to connect the film 26 to the spool 4]. Therefore,
The loading operation of the film cartridge 39 into the camera body 31 becomes extremely simple.

Note that the present invention is not limited to the above embodiments,
It can be implemented in various other ways. For example, as shown in FIG. 3, the inclined edge 26b of the film 26 is formed to extend from the vicinity of the upper edge to the lower edge. Edges slightly perpendicular to the transport direction may be left at both ends.

Furthermore, the perforations 26a may be formed not only on one side but also on the other side.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a film cartridge according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line n-■ in FIG. 1, FIG. 3A is a front view of the film in the film cartridge, and FIG. The figure is an explanatory diagram showing the state where the film cartridge is stored in the camera and the film is pulled out.
, 5 are front and bottom views of the camera showing the state in which the film cartridge is about to be stored in the film cartridge storage chamber of the camera body, respectively, and FIG. 6 shows that the film cartridge is the cartridge of the camera body shown in FIG. A plan view of the camera stored in the storage chamber, FIG. 7 is an explanatory diagram of the drive unit for the film winding shaft, sprocket, and spool of the camera shown in FIG. 4, and FIG. 8 is an illustration of the camera shown in FIG. 9 is a flowchart showing the initial setting operation of the camera shown in FIG. 4; FIG. 10 is a flowchart showing the initial film winding operation of the camera shown in FIG. 4; 11th A
The figure and FIG. 11B show the photographing operation of the camera shown in FIG.
It is a flowchart which shows a film winding operation and a film winding operation. ...first engaging portion, 23...sprocket, 23a.
...Second engaging portion, 25...Film entrance/exit, 26...
・Film, 26a...Perforation, 26b
...Slanted edge, 26c...Tip, 27...Light blocking member, 31...Camera body, 32...Autofocus block, 33...Finder block, 34...
・・Flash, 35 flash light emitting condenser, 36・
...Battery, 37...Film chamber (spool chamber),
38...Aperture, 39...Film cartridge, 40...Film cartridge storage chamber, 41...
・Spool, 43...Film cartridge entrance/exit,
130...Film winding drive member, 131...Film delivery drive member, RD...Film transfer amount detection means. Figure 1 Patent Applicant Minolta Camera Co., Ltd. Agent Patent Attorney Maeda Ao et al. Figure 2 Figure 3A Figure 4 Figure 6 Figure 38rjlI Figure 5 Figure 9 Figure 10

Claims (3)

[Claims] (1) A take-up shaft (22) for winding the film (26);
The winding shaft (22) has a film entrance/exit (25) and the winding shaft (22).
A film cartridge comprising a case (21) for accommodating a film (26) wound on a film (26) in a light-blocking state, the perforation (26a) being formed along the longitudinal direction on at least one side in the width direction of the film (26). ), and an inclined edge (26b) that is inclined from one side where the perforation (26a) is formed to the other side toward the proximal end of the distal end (26c) of the film (26). A film cartridge characterized by: (2) The film cartridge according to claim 1, wherein the perforations (26a) are formed on both sides of the film (26) in the width direction. (3) The film cartridge according to claim 1 or 2, wherein the inclined edge (26b) extends from one side of the film (26) to the other side. (4) The inclination angle of the above-mentioned inclined edge (26b) is
The film cartridge according to any one of claims 1 to 3, wherein the angle is 40 to 70 degrees with respect to the film transport direction.