JP2003215693A - Mounting device for film holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate taking out of a film holder. <P>SOLUTION: The film holder 21 is mounted on a magazine body 20 through a holder mounting port 25 and a rear cap 3 closes the port 25 in mounting. Pressure plate energizing means energizes the pressure plate toward a pressure plate receiving rail disposed at a magazine body 20. A locking mechanism locks the film holder 21 so as not to jump outside from the port 25 by overcoming the energization of the pressure plate energizing means. When the locking mechanism is unlocked, the film holder 21 is automatically jumped outside from the port 25 by the reaction force generated when the pressure plate receiving rail pushes back the pressure plate by overcoming the energization of the pressure plate energizing means. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film holder mounting apparatus for removably mounting a film holder for mounting a photographic film on a camera body or a magazine body removably mounted on the camera body. .

[0002]

2. Description of the Related Art It is difficult to load a roll film into a camera using a brownie size roll film because the film width is long. Therefore, a type in which a film holder is taken out from the camera body and loaded into the taken out film holder is known as "Fuji GX680III Professional" (trade name).

In this camera, a film magazine is detachably attached to the camera body. The film magazine is composed of a magazine body and a film holder. A plurality of film magazines are usually prepared, and can be removed from the camera body for quick film exchange. The film holder can be detached from the magazine main body in order to easily load the photographic film. The magazine main body is provided with a back cover that can be opened and closed on the opposite side to the connection surface of the camera main body, and the back cover is opened to take out the film holder.

[0004]

However, there is a drawback that it is difficult to take out the film holder from the film magazine. This is because the film holder is completely inside the film magazine.

Further, if a structure for pushing out the film holder in conjunction with opening / closing of the back lid is adopted, it becomes simple. However, when attaching the back lid to the film holder, opening / closing operation of the back lid is not necessary. The operation is simple, but conversely, it is difficult to take out the film holder together with the back cover.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a film holder mounting device in which a film holder for loading a photographic film can be easily taken out. .

[0007]

In order to achieve the above object, in the film holder mounting apparatus of the present invention, when the film holder is mounted through the holder insertion opening provided in the camera body or the magazine body, the holder is inserted. A back cover that closes the mouth, an urging means that urges the camera body or magazine body to push outward from the holder insertion opening when attached to the camera body or magazine body, and a part of the camera body or magazine body when attached. The lock mechanism is provided so as to be engaged and locked so as not to jump out of the holder insertion opening, and to release the lock in synchronization with an external operation.

A simple spring may be used as the biasing means.
In this case, when the film holder is attached to the camera body or the magazine body, the film holder is biased by the spring toward the holder insertion opening.

Further, the urging means may also be a spring used in a mechanism provided in the film holder. For example, on the side opposite to the side where the back cover is arranged, the film holder is provided with a support means for movably supporting the pressure plate along the inserting / removing direction of the film holder, and the pressure plate is provided on the camera body or the magazine body at the time of mounting. A stopper means for restricting the movement of the pressure plate at a position beyond the planned contact position where it contacts the pressure plate receiving rail to form a tunnel gap in the insertion direction of the film holder, and a spring for urging the pressure plate toward the planned contact position. And the back cover is pushed out from the holder insertion opening by using the reaction force of the spring generated when the pressure plate receiving rail pushes back the pressure plate against the urging force of the spring when mounted on the camera body or magazine body. You may

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a camera 10 is a photograph of a camera body 14 having a taking lens 11, a shutter mechanism 12, a mirror / body shield plate up / down mechanism 13 and the like. A film magazine 16 in which the film 15 is loaded is detachably attached. The film magazine 16 is removed when the photographic film 15 is loaded. For removal, the slide lever 17 provided on the camera body 14 is slid.

The film magazine 16 is a magazine body 2
0 and a film holder 21. The magazine body 20 is provided with an aperture 22, a shield plate 23, and a holder insertion port 25. Aperture 22
Is formed on the connection surface with the camera body 14. The shield plate 23 is for opening and closing the aperture 22, and is opened and closed by using the drive obtained from the rotation operation of the operation knob 26 provided outside the magazine body 20. The holder insertion opening 25 is formed on the surface opposite to the surface on which the aperture 22 is formed.

The film holder 21 includes a film loading section 28, a film winding section 29, a film feeding mechanism 30,
A pressure plate switching mechanism 31, a lock mechanism 32, and a back cover 33 are provided. The lock mechanism 32 prevents the film holder 21 from coming out of the magazine body 20. The back cover 33 closes the holder insertion opening 25. The back cover 33 is provided with a take-out operation portion 34 exposed to the outside. The lock mechanism 3 is operated by operating the take-out operation section 34.
2 is unlocked.

The lock mechanism 33 is provided on the inner surface of the back cover 33. As shown in A-1 of FIG. 3, the lock mechanism 33 includes a pair of left / right slide plates 35 and 36, a circular plate 37,
The leaf spring 38 and the return spring 39 are included.

The left and right slide plates 35 and 36 are discs 37.
It is arranged on each of the left and right sides sandwiching, and is attached slidably along the left-right direction of the back cover 33. The left and right slide plates 35, 36 are provided with engaged parts 35a, 36a at one end facing the disk 37, and lock claws 35b, 36b at one end on the opposite side. Then, the left and right slide plates 35, 36 have the left and right lock claws 35b,
36b enters recesses 25a and 25b provided at the edges of two opposite sides of the four sides of the holder insertion opening 25 to retract the film holder 21 to the magazine body 20 and retract from the recesses 25a and 25b, respectively. Move to the release position to release the lock, and return spring 39
Are urged toward the lock position.

The disk 37 is connected to the take-out operating portion 34 provided on the outer surface of the back cover 33 with the back cover 33 interposed therebetween.
It rotates together with the rotation operation of the operation unit 34. The left and right slide plates 35,
A pair of engagement pins 37a and 37b are provided which engage with the engaged portions 35a and 36a of the slide member 36 to move the left and right slide plates 35 and 36 toward the unlocked position.

When the lock is released, B-1 in FIG.
And B-1-1, a knob 34 of the operation unit 34 is provided.
a from the recess 33a provided on the outer surface of the back cover 33, and then, as shown in B-2, the knob 34a is moved to the arrow B direction.
Rotate in the direction. As a result, the disc 37 moves in the direction of the arrow A as shown by A-2 in conjunction with the rotating operation of the knob 34a.
Direction, the pair of engaging pins 37a and 37b engage with the engaged portions 35a and 36a, respectively, and as shown in FIG.
The disk 37 rotates in the direction of arrow A as shown in FIG. Due to this slight rotation, the left and right slide plates 35, 36 move in mutually opposite directions and move to the unlocked position. Since the slide plates 35 and 36 are urged toward the lock position by the urging force of the spring 39, when the operation is stopped after the lock is released, the disc 35 rotates in the opposite direction.

The rotation of the disc 35 is temporarily stopped by a click mechanism at two rotation positions, a knob storage position and an unlocking completion position. The click mechanism includes two recessed portions 35c, 3 provided on the outer circumference of the disk 35.
5d and the leaf spring 38. At the knob storage position, as shown in FIG. 1A, the tip 38a of the leaf spring 38 engages with the first recess 35d, and at this position, as shown in FIG. The knob 34a of the operation unit 34 can be laid down in the recess 33a. At the unlocking completion position, as shown in FIG. A-2, the tip 38a of the leaf spring 38 is engaged with the second recess 35c, and the rotation of the disc 37 returned after unlocking is stopped. Is.

As shown in FIG. 4, the film feeding mechanism 30 comprises a feeding motor 40, a drive transmission mechanism 41, a drive shaft 42, and a driven shaft 43. Film loading section 28
, A spool 44 around which the brownie-sized photo film 15 is wound, and an empty spool 45 is loaded in the film winding section 29.

The drive shaft 42 is provided on the film winding portion 29 and engages with one end of the spool 45 in the axial direction. A free support shaft 46 is arranged at the other end of the spool 45 in the axial direction. The rotation of the motor 40 is transmitted to the drive shaft 42 via the drive transmission mechanism 41.
Rotation in one direction (normal rotation) of 0 rotates in the film winding direction.

The driven shaft 43 engages with one end of the spool 44 set in the film loading section 28 in the axial direction. The support shaft 47 is engaged with the other. The driven shaft 43 is rotationally loaded. With this load, photo film 15
Is pulled out without slack.

The photographic film 15 pulled out from the film loading section 28 is sent to the film winding section 29 via a counter roller 48 and a free roller 49. The counter roller 48 and the free roller 49 are both free rollers, and the pressure plate 5 is provided between these rollers 48 and 49.
0 is placed. The pressure plate 50 includes a film extending portion 15 a extended between the rollers 48 and 49 and a film optical axis 51.
Support from the rear in the direction of. In this camera 10, the photo film 15 is fed in the vertical direction (vertical direction). The film may be fed in the horizontal direction.

The drive transmission mechanism 41 for feeding the film is a reduction gear train and has a planetary gear clutch 53 incorporated therein. The planetary gear clutch 53 includes a sun gear 54,
It is composed of a planetary gear 55, an arm receiving portion 56, and an arm portion 57. The sun gear 54 is the output gear 5 of the motor 40.
It is provided coaxially and integrally with a gear 59 that meshes with the gear 8. The arm receiving portion 56 is coaxial with the sun gear 54 and integrally formed in a circular shape between the sun gear 54 and the gear 59, and has a larger diameter than the sun gear 54. Arm 5
7, a planetary gear 55 is provided at one end and a shaft hole 60 is provided at the other end. The shaft hole 60 is rotatably engaged with the arm receiving portion 56, and the sun gear 54 meshes with the planet gear 55. The arm portion 57 rotates to a feeding system drive transmission position where the planet gear 55 meshes with the input gear 61 of the film feed reduction gear train when the motor 40 rotates in the forward direction, and when the motor 40 rotates in the reverse direction, the planet gear 55 rotates. The pressure plate switching drive transmission system 62
To the pressure plate switching drive transmission position that meshes with the input gear.

Further, the drive transmission mechanism 41 is associated with an encoder 63 for the motor rotation speed. The encoder 63 includes an encode plate 64 and a photo interrupter 65.
And a pulse generator 66. The photo interrupter 65 detects the passage of the slit of the encode plate 64 and generates one pulse (motor rotation pulse) in response to this detection. This motor rotation pulse is sent to the control unit 67. The control unit 67 uses the photo interrupter 65.
The rotation angle of the film feeding motor 40 is detected by counting the number of pulses.

The counter roller 48 is used for the photo film 15.
The film feed length is obtained by rotating with the transfer of the film. A transport encoder 68 is connected to the counter roller 48. The transport encoder 68 is also composed of an encoder plate, a photo interrupter, and a pulse generator, like the encoder 63 described above, and transport pulses corresponding to the rotation of the counter roller 48 are sent from the pulse generator to the control unit 67. .

A bar code sensor 69 is arranged above the free roller 49. This barcode sensor 6
9 reads the bar code recorded on the photographic film 15. The bar code is recorded on the surface of the joining tape, and data of the film type, the film sensitivity, and the number of films is recorded by combining two types of black bars and white bars having different widths. The joining tape is attached to the superposed portion with the leading end of the photographic film 15 superposed on the leader paper. The bar code sensor 69 is composed of a photo sensor, irradiates the photographic film 15 with infrared rays, receives reflected light, outputs a photoelectric signal having a signal level corresponding to the intensity of the received reflected light, and controls this. Send to 67.

The control unit 67 controls the driving / stopping and the rotation direction of the film feeding motor 40 via the driver 70. Further, the control unit 67 detects the passage of the tape based on the barcode detection signal from the barcode sensor 69, and based on this detection timing, the transport encoder 6
The counting of the number of carrier pulses from 8 is started. And
When the count value reaches a predetermined constant value, the control unit 67 causes the first frame of the photo film 15 to have the aperture 2 aperture.
It detects that it is set to 2. In addition, in frame-by-frame advance after shooting, the control unit 67 determines whether or not the number of carrier pulses from the carrier encoder 68 has reached the frame-by-frame advance, and performs frame-by-frame advance. Although not shown, the control unit 67
As is well known, a photometric unit, a distance measuring unit, a shutter mechanism, a release button, a liquid crystal display panel, etc. are connected to the.

As shown in FIGS. 5 to 7, film rails 72 are arranged on the left and right of the aperture 22. The film rail 72 is composed of a narrow ridge that slightly projects rearward in the shooting optical axis direction and is long in the film feeding direction. The surface (film running surface) facing the pressure plate 50 contacts both side edges of the film emulsion surface side outside the screen range, and serves as a guide surface during film running.

On both outer sides of the pair of film rails 72,
A pressure plate receiving rail 73 including a pair of narrow ridges is provided along the film rail 72. The pressure plate receiving rail 73 also protrudes toward the rear of the photographing optical axis, and these protruding surfaces (hereinafter referred to as “pressure plate receiving surfaces”) are formed so as to slightly project from the film running surface of the film rail 72. ing. The step difference between the film running surface and the pressure plate receiving surface serves as a tunnel gap corresponding to a thin film, 220 roll film in this embodiment, and this gap is as small as 0.235 ± 0.05 mm. There is a gap.

The pressure plate switching mechanism includes a pressure plate 50, a pair of openings 74, four guide pins 75 with flanges, and a pair of leaf springs 7.
6, 4 cam members 77-80, a pair of cam shafts 81, 8
2, a pair of support shafts 83, 84 and four springs 85.

The pressure plate 50 is attached to the film holder 21 so as to be movable in the photographing optical axis direction. The base member 88 of the film holder 21 has a cylindrical portion 89 (see FIG. 6) having a through hole formed along the photographing optical axis direction.
And a guide hole 90 are formed. The pressure plate 50 is movable in the photographing optical axis direction with respect to the tubular portion 89 by the screw 91 and the guide pin 92 with a screw hole.
It is attached to 1. A spring 93 is interposed between the guide pin 92 with a screw hole and the tubular portion 89, and the spring 93 serves as the pressure plate 5.
0 is urged toward the rear in the direction of the photographing optical axis. This pressure plate urging spring 93 constitutes the first urging means of the present invention. The back cover 33 is attached to the base member 88 on the side opposite to the side where the pressure plate 50 is arranged.

A guide protrusion 94 is formed behind the pressure plate 50, and the guide protrusion 94 engages with the guide hole 90 to prevent the pressure plate 50 from rotating around the screw 91. In addition, the screw 91, the guide pin 92 with a screw hole, the guide hole 9
0, the guide protrusions 94, and the like constitute a pressure plate guide unit that movably supports the pressure plate 50 in the imaging optical axis direction.

The four openings 74 are formed at the four corners of the back surface of the pressure plate 50, and each of them has a through hole 95 and a step surface 96.
It consists of and. The through hole 95 is formed along the photographing optical axis direction. The step surface 96 is formed by recessing one step in the rear surface of the pressure plate 50. In the through hole 95, the step surface 9
A flanged guide pin 75, which constitutes a spacer member, is inserted from the side of 6 from the pin tip 75a. The pair of leaf springs 76 each have a vertically long thin plate shape, and the central portion is attached to the rear surface of the pressure plate 50, and the upper and lower ends of the pair of leaf springs 76 press the brim 75b of the brim guide pin 75 to form the brim guide pin 75. Are prevented from falling out of the opening 74.

In the guide pin 75 with a collar, the front surface 75c of the collar 75b contacts the step surface 96 and the pin tip 75a projects from the front surface of the pressure plate 50, and the front surface 75c of the collar 75b is separated rearward from the step surface 96. The pin tip 75a can freely move in and out of the retracted position where it retracts from the front surface of the pressure plate 50, and is biased toward the projecting position by the leaf spring 76. The protruding length of the flanged guide pin 75 is set based on the minimum thickness of the photographic film 15 to be used such that the pin tip 75a protrudes to the front surface of the pressure plate 50 at the protruding position. The front surface 75c of the brim 75b constitutes the protrusion restricting locking portion of the present invention, and the step surface 96 constitutes the spacer locking portion.

The brim 75b of the bridging guide pin 75 is
The thickness is such that it projects from the rear surface of the pressure plate 50 at the protruding position. Behind the flanged guide pin 75, four cam members 77 to 80 are arranged via a leaf spring 76. The cam members 77 to 80 include the first and second cams 97,
98 (see FIG. 7). The first cam 97 contacts the leaf spring 76, and the second cam 98 contacts the rear surface of the pressure plate 50. The pair of the first and second cams 97 and 98 is formed by the four plates of the pressure plate 50.
The upper two pairs are respectively arranged at the corners and are connected to the upper two pairs by an upper cam shaft 81 arranged along the horizontal direction.
Also, there are two pairs of left and right first and second cams 97, 98 on the lower side.
Are connected by a lower cam shaft 82 arranged along the horizontal direction.

An upper support shaft 83 is arranged rearward of the upper cam shaft 81 in the direction of the photographing optical axis and downwardly along the horizontal direction, and an optical axis of the photographing optical axis with respect to the lower cam shaft 82. Lower side support shafts 84 arranged along the horizontal direction are provided on the rear side and the upper side of the direction, respectively. Both ends of the pair of support shafts 83 and 84 are supported by the base member 88.

One end of a pair of upper link plates 99 (see FIG. 6) is attached to the upper support shaft 83 on the left and right in the axial direction. The other ends of the pair of upper link plates 99 are linked to the upper cam shaft 81, and rotatably support the upper cam shaft 81 about the shaft center of the upper support shaft 83. And
The upper cam shaft 81 is biased toward the front of the photographing optical axis by two cam biasing springs 85 interposed between the cam shaft 81 and the base member 88. Protrusions 101 protruding rearward on the photographing optical axis are formed at one ends of the pair of upper link plates 99, respectively. The protrusion 101 is the base member 88.
The pair of stopper portions 102 that are integrally formed with each other. The pair of stopper portions 102 prevent the rotation of the upper cam shaft 81 against the bias of the spring 85.

The lower support shaft 84 also has an upper support shaft 83.
A pair of lower link plates 103 on the left and right in the axial direction with the same configuration as
Is attached to one end of the lower link plate 103, and the other end of the pair of lower link plates 103 is linked to the lower cam shaft 82.
Rotatably supports the lower cam shaft 82 around the shaft center. The lower cam shaft 82 is biased forward of the photographing optical axis by two cam biasing springs 85 interposed between the lower cam shaft 82 and the base member. The four springs 85, including the upper side, form the second biasing means of the present invention. Protrusions 104 are also formed at one end of each of the pair of lower link plates 103. The protrusions 104 abut against a pair of stoppers 105 formed integrally with the base member 88, and the lower camshaft 82 is formed. Is prevented against the bias of the spring 85. Note that, in FIG. 5, the shapes of the link plates 99 and 103 are simply shown in order to prevent the drawing from being complicated.

When these protrusions 101 and 104 contact the stoppers 102 and 105, the front surface 50a of the pressure plate 50 is slightly forward of the film feeding surface 15b set for the film holder 21 in the optical axis direction. It will be in the protruding position. When the film holder 21 is set in the magazine body 20, the flanged guide pin 75 or the front surface of the pressure plate 50 comes into contact with the pressure plate receiving rail 73 and the cam members 77 to 80.
A tunnel gap corresponding to the displacement position of is formed.

The drive from the pressure plate switching drive transmission system 62 is transmitted to one support shaft 83. This drive is performed by the gears 110, 111 provided on the upper support shaft 83 and the cam shaft 81.
Is transmitted to the cam shaft 81 by the meshing of. The drive of the upper support shaft 83 is also transmitted to the lower support shaft 84 via the two gears 112 and 113. The drive transmitted to the lower support shaft 84 is generated by the engagement of the gears 114 and 115 provided on the lower support shaft 84 and the cam shaft 82 with each other.
Is also transmitted.

The pair of cam shafts 81, 82 rotate the pair of cam members 77, 78 between a wide position for widening the tunnel gap and a narrow position for narrowing the tunnel gap by rotation of the motor 40 in one direction. In the wide position, as shown in FIGS. 8 and 9, the first cam 97 pushes the flange 75b through the leaf spring 76 to move the flanged guide pin 75 to the projecting position, and the second cam 98 moves the pressure plate 50 to the pressing plate 50. Evacuate from the rear. As a result, the pin tip 75a of the flanged guide pin 75 contacts the pressure plate receiving rail 73, and the front surface of the flange 75b at this time is the step surface
The pressure plate 50 is moved rearward in the direction of the photographing optical axis by the urging force of the spring 93 to widen the tunnel gap G1 by the moving length until it comes into contact with 6. The tunnel gap G1 at this time is in the range of 0.4 ± 0.02 mm, for example.

On the contrary, in the narrow position, as shown in FIG. 10, the second cam 98 directly pushes the rear surface of the pressure plate 50 to move the first cam 98 to the first position.
The cam 97 is provided with a flanged guide pin 75 via a leaf spring 76.
Release the pressure of. As a result, the pressure plate 50 comes into contact with the pressure plate receiving rail 73, and the tunnel gap G2 becomes narrower by the amount of the pressure plate 50 protruding forward in the optical axis direction than in the wide position.

The spring 85 for urging the cam members 77-80 toward the pressure plate 50 has a stronger urging force than the spring 93 for urging the pressure plate 50 rearward of the photographing optical axis. Therefore, the pressure plate 50
When the projections 101, 104 of the link plates 99, 103 are in contact with the stoppers 102, 105 while being biased toward the front of the photographing optical axis by the bias of the cam members 77-80. Held in position. The pair of cam shafts 81 and 82 rotate in opposite directions, but they may rotate in the same direction.

At the end of the lower support shaft 84, the switch plate 1
16 are provided. The switch plate 116 has a camshaft 8
Switch 117 is turned on when 1,82 is rotated to wide position
To do. The signal obtained from the switch 117 is fetched by the control unit 67. The control unit 67 receives the ON signal obtained from the switch 117 and then the encoder 6 for rotating the motor.
The counting of the number of pulses from 3 is started, and when the count value reaches a predetermined constant value, it is detected that the cam shafts 81, 82 rotate to the narrow position.

When the photo film 15 is set in the film loading section 28 and the film is initially fed, if the tunnel gap is changed, the planetary gear clutch 53
Is in the feeding drive transmission position, the motor 40
However, there is a possibility that the photographic film 15 may be conveyed in reverse by a slight drive until the photographic film 15 is reversed and is switched to the pressure plate switching drive transmission position, and the photographic film 15 may be loosened. In order to prevent this, a check claw 119 is engaged with the gear 118 connected to the drive shaft 42. On the contrary, also when the frame feed of the photo film 15 is performed after the pressure plate position is switched, the pressure plate switching drive transmission system 6 is used.
2 is transmitted to the cam member 77.
.About.80 may rotate and the position of the pressure plate 50 may be displaced.
There is no problem because it can be absorbed by 15 backlashes.

Next, the operation of the above configuration will be described. The film loading is performed by the operation knob 2 provided outside the magazine body 20.
Operate 6. As a result, the shielding plate 23 moves to the closed position and the aperture 22 is closed.

After closing the aperture 22, the film holder 21 is removed from the magazine body 20. In this operation, the operating portion 34 of the film holder 21 is operated to unlock the lock mechanism 33.

At this time, the lock mechanism 33 operates as shown in FIG.
, The left and right slide plates 35, 36 are urged toward the lock position by the urging of the spring 39,
5b and 36b are engaged with the recesses 25a and 25b. The disc 37 has the leaf spring 3 in the first recess 35d.
8 is held at the engaged rotational position.

To release the lock, use the knob 34a shown in FIG. 3B.
-1 from the state shown in -1 to stand up as shown in B-1-1, then hold the knob 34a, and set the arrow B shown in B-2.
Rotate in the direction. As a result, the disc 37 also rotates in the direction of the arrow A, and the engagement pins 36a and 37a move to the engaged portions 35a and 35a.
36a, respectively. Then, as shown in FIG. B-3, by continuously rotating the knob 34a,
As shown in FIG. 3A-3, the disk 37 rotates in the direction of arrow A, and the left and right slide plates 35, 3 are rotated by a slight rotation thereafter.
6 moves toward the unlocked position. As a result, the lock claws 35b and 36b are retracted from the recesses 25a and 25b.

When the operating portion 34 is operated to unlock the film, the back lid 33 of the film holder 21 is inserted into the holder insertion opening 25.
Comes out slightly from.

In the film holder 21, when the film holder 21 is a single body, the projections 101 and 104 are the stoppers 10.
Since the pressure plate 50 or the flanged guide pin 75 is in contact with the pressure plate 50 or the flanged guide pin 75, the pressure plate 50 or the flanged guide pin 75 is held at a position projecting forward from the planned contact position where it contacts the pressure plate receiving rail 73. Is urged forward by the spring 85. When the film holder 21 is loaded into the magazine body 20 from this state, the pressure plate 50 or the pin tip 75a of the flanged guide pin 75 contacts the pressure plate receiving rail 73, and the pressure plate 50 causes the spring 8 to move.
It is moved to the rear of the photographing optical axis from the predetermined contact position against the bias of 5, and is held in the narrow position or the wide position. For this reason,
Holder insertion opening 2 provided on the opposite side of the pressure plate receiving rail 73
5, the back cover 33 is attached to the magazine main body 2 by the lock mechanism 32 so that the film holder 21 does not pop out due to the reaction force generated when the pressure plate receiving rail 73 pushes back the pressure plate 50.
It is locked at 0.

As a result, when the take-out operating portion 34 is operated to unlock the lock mechanism 32, the film holder 21 is pushed outward from the holder insertion opening 25 together with the back lid 33 by the bias of the spring 85. The film holder 21 can be taken out easily.

When the operation of the operating portion 34 is stopped after the lock is released, the operating portion 34 stops the rotation of the disc 35 at the position where the tip 38a of the leaf spring 38 engages with the second recess 35c.

A spool 44 around which the photographic film 15 is wound around the film loading section 28 of the film holder 21 taken out.
And the empty spool 4 on the film winding section 29.
Set 5.

The Brownie film 15 is preliminarily wound around the spool 44, and is loaded into the film loading section 28 as it is. After loading, attach the tip of the leader paper to the empty spool 45 of the film winding unit 29.
, The spool 45 is rotated in the film winding direction, and the leader paper is wound around the spool 45 by a few turns, thereby completing the film loading.

The film holder 21 loaded with the film is attached to the magazine body 20. For this attachment, the film holder 21 is inserted into the holder insertion opening 25 from the side where the pressure plate 50 is arranged. At this time, the lock claws 35 b and 36 b are pushed by the edge of the back cover 33. Therefore, the slide plate 35,
36 is pushed toward the unlocked position against the bias of the spring 39. As a result, the lock claws 35b and 36b pass over the edge, and after the lock claws 35b and 36b pass, the slide plates 35 and 36 are moved toward the lock position again by the biasing force of the spring 39, and the lock claws 35b and 36b move toward the recesses 25a and Two
Engage with 5b. As a result, the pressure plate 50, the film loading section 28, and the film winding section 29 are completely stored in the back of the hull insertion slot 25, and the holder insertion slot 25 is covered by the back lid 33.

After that, the knob 34a is rotated to the position indicated by B-1 in the direction opposite to the arrow B direction shown in FIG. 3B-2, and the knob 34a is laid down in the recess 33a.

When the film holder 21 is attached to the magazine body 20, the pressure plate 50 or the pin tip 75a of the flanged guide pin 75 comes into contact with the pressure plate receiving rail 73, and the pressure plate 5
0 is moved to the rear of the photographing optical axis from the predetermined contact position against the bias of the spring 85, and is held at the narrow position or the wide position.

After the film holder 21 is attached to the magazine body 20, these (film magazine 16) are attached to the camera body 14. After that, the operation knob 26
Is rotated to set the shield plate 23 to the open position and open the aperture 22.

After the film magazine 16 is attached to the camera body 14, the controller 67 detects that the aperture 22 is in the open position, moves the tunnel gap to the wide position, and then automatically performs the initial film feed. To do it.

When the tunnel gap is set to the wide position, the motor 40 is driven in the reverse direction. Reverse rotation of the motor 40
The sun gear 54 is transmitted to the sun gear 54, and the sun gear 54 is transmitted to the planet gear 55.
Is rotated to the pressure plate switching drive transmission position to engage the planetary gear 55 with the input gear of the pressure plate switching drive transmission system 62.

This drive is transmitted to the pair of support shafts 83, 84 and the pair of cam shafts 81, 82, the switch plate 116 provided on the support shaft 84 rotates, and the switch plate 116 turns on the switch 117. At the same time, the control unit 67 stops the reverse rotation drive of the motor 40. As a result, the pair of cam shafts 81 and 82 come to the wide rotation position. In this rotational position, the first cam 97 pushes the flange 75b through the plate spring 76 to move the flanged guide pin 75 to the protruding position, and the second cam 98 is retracted from the rear surface of the pressure plate 50. Therefore, the pin tip 75a of the flanged guide pin 75 comes into contact with the pressure plate receiving rail 73, and the pressure plate 50 moves rearward in the photographing optical axis direction by the bias of the spring 93 to form the tunnel gap G1 for the 120 film.

After stopping the reverse drive of the motor 40,
The initial film feed is performed. In this film initial feeding, the film feeding motor 40 is rotated in the normal direction to
The photo film 15 is sent until the frame of the top frame is set on the aperture 22. When the motor 40 rotates in the normal direction, the planetary gear 55 rotates to the feed system drive transmission position and meshes with the input gear 61 of the film feed reduction gear train. As a result, the drive of the motor 40 is transmitted to the drive shaft 42, and the drive shaft 42 rotates the spool 45 in the film winding direction,
The photo film 15 is pulled out from the spool 44.

At the initial feeding of the film, the bar code of the photographic film 15 is read by the bar code sensor 69. The signal from the sensor 69 is sent to the control unit 67 and decoded into the film type, the film sensitivity, and the number of films. At the time of the initial feeding of the film, since the tunnel gap is set to the gap for the 120 type, which is the maximum gap, a smooth film feeding is possible not only for the 120 type but also for the 220 type thinner than the 120 type. It will be possible.

The film feeding is continued, and then the paster (tape) joining the leader paper and the photographic film 15 is detected by the bar code sensor 69. After detecting the paster, the number of pulses from the transport encoder 68 is counted, and the photo film 15 is sent for a predetermined length, so that the first frame of the shooting is the aperture 2.
Set to 2.

At this time, the thickness of the leader paper, the photographic film 15, and the paster for three sheets passes through the tunnel gap. The thickness of three sheets is longer than the length of the tunnel gap G1. However, since the pressure plate 50 and the cam members 77 to 80 move rearward of the photographing optical axis against the bias of the spring 85 to widen the tunnel gap, it is possible to allow the passage of the thickness of three sheets without any problem. You can

After the initial feeding of the film, the film type is identified based on the information read from the bar code sensor 69. When the identified film type is 120 type, the tunnel gap has already been set to the gap G1 for 120 type in the initial film feeding, so that it is not necessary to newly switch.

On the other hand, when the film type is 220 type, the film feeding motor 40 is rotated in the reverse direction. As a result, the rotational force of the motor 40 is transmitted to the pressure plate switching drive transmission system 62 via the planetary gear clutch 53, and the pair of cam shafts 81 and 82 rotate in opposite directions.

In the case of the 120 type tunnel gap G1, the switch plate 116 turns on the switch 117. The control unit 67 starts counting the number of pulses from the motor rotation encoder 63 after the support shaft 84 has been rotated at least once and the switch 117 has been turned ON, and the count value has reached a predetermined constant value. Sometimes motor 4
Stop reverse drive of 0. As a result, the cam shafts 81, 8
2 is the narrow rotation position. When this happens, the first
The cam 97 is provided with a flanged guide pin 75 via a leaf spring 76.
The second cam 98 pushes the pressure plate 50 toward the pressure plate receiving rail 73, and the tunnel gap G2 is formed between the front surface of the pressure plate 50 and the film rail 72. This prepares for shooting.

When the release button 130 provided outside the camera body 14 is operated, in response to this, the lens shutter 12 is first closed, and at the same time, the mirror of the mirror / body shielding plate up / down mechanism 13 is raised. In response to the closing operation of the lens shutter 12, the main body shield plate of the mirror / main body shield plate up / down mechanism 13 is raised. Then, in response to the raising of the mirror and the main body shielding plate, the lens shutter 12 is operated for a preset shutter time and exposure is performed.

After the exposure is completed, an exposure completion signal is sent from the lens shutter 12. In response to this, the control unit 67 sends a winding start signal to the driver 70, and the motor 40
To rotate in the normal direction to start frame-by-frame feed. At the same time, the down signal is transmitted to the mirror / body shield plate up / down mechanism 13
Then, the mirror and the main body shielding plate are returned to the down position, and the preparation for the next photographing is completed.

The counter roller 4 is used for feeding one frame film.
The number of carrier pulses from the carrier encoder 68 provided in 8 is 1
The normal rotation drive of the motor 40 is stopped in response to the count corresponding to the frame feed amount. As a result, the next shooting frame is set in the aperture 22. After that, by repeating the shutter release, the shooting is continued until the last shooting frame.

After the last frame is photographed, the film is finally fed. In the film final feed, the photo film 15 is fed until the entire photo film 15 is wound on the spool 45. In this control, the bar code sensor 69 detects the trailer paper to invalidate the film winding stop, and the film final feeding is executed. And
When the sensor 69 detects that there is no trailer paper, the forward rotation drive of the motor 40 is stopped in response to this. As a result, all the photo films 15 are spooled 4
Can be wound up to 5.

By carrying out the final film feeding in this way, the film 15 having been photographed is entirely wound up on the spool 45 of the film winding section 29. For film exchange, the film holder 21 is removed, the spool 45 around which the film 15 having been photographed has been wound is taken out from the film winding section 29, the empty spool 44 in the film loading section 28 is removed, and the empty spool 44 is replaced. New filming can be performed by setting the spool 44 on which the new photo film 15 is wound on the film winding unit 29, setting the spool 44 on the film loading unit 28, and then setting the film holder 21 again.

The tunnel gap is automatically set in advance in accordance with the type of film read from the bar code sensor 69 at the time of initial film feeding. Moreover, since the rotational positions of the cam shafts 81 and 82 do not shift even when the power is turned off,
The tunnel gap is maintained in a state according to the loaded film type.

In the above-described embodiment, the film holder 21 is pushed out to the outside by also using the spring 85 of the pressure plate switching mechanism, but the present invention is not limited to this, and the pressure plate switching mechanism is omitted, and the pressure plate 50 is simply replaced. A spring that biases the pressure plate receiving rail 73 may also be used. Further, the shared spring is not limited to the spring 85 for urging the pressure plate 50, but is provided in the film holder 21.
For example, it may be a spring used in a film feeding mechanism or the like.

[0076]

As described above, in the film holder mounting apparatus of the present invention, when the film holder is mounted on the camera main body or the magazine main body, the film is provided with the urging means for urging it so as to push it outward from the holder insertion opening. Since the holder is provided with a lock mechanism that engages a part of the camera body or the magazine body against the urging by the urging means and locks it so as not to jump out of the holder insertion opening, When the lock of the lock mechanism is released by an external operation, the film holder pops out from the holder insertion opening by the urging of the urging means, so that the film holder can be taken out easily.

Further, in the film holder mounting device according to the second aspect, since the reaction force of the spring for urging the pressure plate toward the pressure plate receiving rail is utilized, a separate spring is not required, thus reducing the cost. Can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a camera of the present invention viewed from a back cover side.

FIG. 2 is an explanatory diagram schematically showing the internal structure of the camera.

FIG. 3 is an explanatory view showing an outline of a lock mechanism provided in the film holder, in which a row B shows an operation procedure for unlocking the operation portion, and a row A shows an operation of the lock mechanism corresponding to the operation of the operation portion. Shows.

FIG. 4 is a perspective view showing an outline of a film feeding mechanism incorporated in a film holder.

FIG. 5 is a perspective view showing an outline of a pressure plate switching mechanism built in the film holder, as viewed from the back cover side of the camera.

FIG. 6 is a vertical sectional view showing a pressure plate switching mechanism provided in the film holder.

FIG. 7 is a transverse sectional view showing a pressure plate switching mechanism.

FIG. 8 is a lateral cross-sectional view showing a main part of the pressure plate switching mechanism when the film holder is set in the magazine body, showing a state where the pressure plate is moved to a wide position.

FIG. 9 is a vertical cross-sectional view showing a main part of the pressure plate switching mechanism when the film holder is set in the magazine body, showing a state where the pressure plate is in a wide position.

FIG. 10 is a transverse cross-sectional view showing a main part of the pressure plate switching mechanism when the film holder is set in the magazine body, showing a state where the pressure plate is moved to a narrow position.

[Explanation of symbols]

14 camera body 16 film magazine 20 magazine body 21 film holder 22 Aperture 33 case back 34 Operation part 35 discs 35,36 slide plate 35b, 36b lock claw 50 pressure plate 72 film rails 73 Pressure plate receiving rail 75 Guide pin with collar 85, 93 springs

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Nobuhiro Aoki             1-324 Uetakecho, Saitama City, Saitama Prefecture             Fuji Photo Optical Co., Ltd. (72) Inventor Tokuji Sato             Fujisha, 3-1345, Izumi, Asaka City, Saitama Prefecture             Shin Film Co., Ltd. F-term (reference) 2H020 DD02 DD06                 2H100 AA53

Claims (2)

[Claims] 1. A film holder mounting device for mounting a film holder on which a photographic film is loaded to a camera body or a magazine body detachably attached to the camera body, wherein the film holder is a camera body or A back cover that closes the holder insertion port when it is mounted through the holder insertion port provided in the magazine body, and a biasing force that pushes it out from the holder insertion port when mounted on the camera body or magazine body. Means and a part of the camera body or magazine body at the time of mounting so as to prevent the body from protruding from the holder insertion opening against the urging force of the urging means, and to be linked to the external operation. And a lock mechanism for releasing the lock of the film holder. 2. A support for arranging the urging means in a film magazine, the urging means being movably supported along the inserting and removing directions of the film holder on the side opposite to the side on which the back cover is arranged. And stopper means for restricting the movement of the pressure plate at a position beyond the planned contact position where the pressure plate contacts the pressure plate receiving rail provided on the camera body or the magazine body to form a tunnel gap when mounted, and in a position beyond the insertion direction of the film holder. And a spring for urging the pressure plate toward the planned contact position, and when the pressure plate receiving rail pushes back the pressure plate against the urging force of the spring when mounted on the camera body or magazine body. 2. The apparatus for mounting a film holder according to claim 1, wherein the back lid is pushed out from the holder insertion opening by utilizing the reaction force of the generated spring.