JP2003114475A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of realizing the accurate positioning of film in a cartridge-loaded state, in a camera in which the cartridge, from which a film leader is exposed, can be loaded. SOLUTION: In this camera, the cartridge 95 is loaded in a cartridge chamber 2a in a direction along a winding shaft in a state where the film leader part is wound, and the width end face 96e of the film 96 is pushed in to a normal position by the leading edge of a film pressing part 7c provided on a cartridge chamber cover 7 by closing the cover 7 even when the position of the film 96 in an axial direction is not a normal loaded position where the film 96 can be engaged with a sprocket pawl 56 when the cartridge 95 is loaded. Therefore, the normal loading of the film 96 can be always performed in this camera.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera structure in which a film cartridge having a film reader protruding from a delivery port can be loaded.

[0002]

2. Description of the Related Art Conventionally, when a film cartridge is loaded in the cartridge chamber, the cartridge is dropped in the spool axis direction of the cartridge so-called a drop-in type film feeding device for a camera.
There is one disclosed in Japanese Patent No. 566. In this film feeding device, when performing film loading,
First, after loading the film cartridge in the cartridge chamber, the cartridge case is rotationally driven to set the film so that it can be fed out. The leading end portion of the film is conveyed toward the spool chamber by using the film conveying roller to be in a loading state.

[0003]

However, according to the film feeding device for a camera disclosed in Japanese Patent Publication No. 7-69566, the above-mentioned film cartridge is mounted to rotate the cartridge case after the film cartridge is loaded. It requires a space necessary for rotating the cartridge, and thus it is difficult to downsize the camera. In addition, a complicated drive unit for rotating the Patrone must be incorporated in the camera. Therefore, a camera in which the film cartridge is not rotated but the leader portion (bottom portion) of the film is exposed can be considered to be loaded by drop-in. However, when this cartridge loading system is adopted, it is difficult to position the leader portion of the film at a predetermined position in the cartridge chamber in the cartridge loaded state, and it is difficult to securely engage the film perforation with the sprocket. There was such a problem.

The present invention has been made to solve the above-mentioned problems, and in a camera in which a film cartridge in which a film leader projects from a delivery port can be loaded, the film leader is set in a predetermined state when the film cartridge is loaded. An object of the present invention is to provide a camera that can be reliably positioned.

[0005]

According to a first aspect of the present invention, there is provided a camera having a winding shaft around which a film is wound, and a film cartridge in which a film leader is projected from a delivery port can be loaded. The film cartridge is a cartridge chamber that can be inserted and removed in the winding axis direction with the film leader protruding from the delivery port, and a cartridge chamber lid that can be moved between a position for opening the cartridge chamber and a position for closing the cartridge chamber. And a film pressing portion provided on the patrone lid and capable of contacting the film leader end surface, when the patrone chamber lid is moved from the open position to the closed position after the film cartridge is loaded in the patrone chamber. The film leader into contact with the end face of the film leader, and insert the film leader into the cartridge chamber. It is a function.

A camera according to a second aspect of the present invention is the camera according to the first aspect, further comprising a sprocket provided in the chamber and capable of driving the film by engaging with the perforation of the film. When moving the patrone chamber lid from the open position to the closed position after loading the film patrone into the patrone chamber, the perforation of the film is caused by the film pressing portion contacting the end face of the film leader. It is inserted into a position where it can be engaged with the sprocket.

According to a third aspect of the present invention, in the camera according to the first or second aspect, the film pressing portion is a convex portion protruding from the patrone lid toward the patrone chamber.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a camera showing one embodiment of the present invention as seen from the bottom side, showing a state in which the patrone chamber lid is opened and a patrone is about to be loaded. 2 and 3 are bottom views of the camera, FIG. 2 shows a state in which the patrone chamber lid is opened, and a two-dot chain line shows a patrone loading state, and FIG. 3 shows a patrone chamber lid in which the patrone chamber lid is loaded. Shows a closed state.

FIGS. 4A and 4B show E of FIG. 8 which will be described later.
FIG. 4A is a view showing a section taken along line E, showing a process of inserting the film leader portion around the film guide portion and the sprocket portion for feeding the film of the camera at the time of loading the cartridge, and FIG. FIG. 4B shows an initial state, in which the perforation of the film leader portion is engaged with the sprocket claws and the insertion of the film leader is completed.

FIG. 5 is an exploded perspective view of a sprocket portion for feeding the film, which is incorporated in the camera. Figure 6
7 (A), (B), FIGS. 7 (A), (B), and (C) are perspective views showing a process of loading the cartridge in the cartridge chamber in the camera, and FIG. 6 (A) before loading the cartridge. 6 (B) to 7 (A) and 7 (B), the state in the middle of loading the cartridge is shown, and FIG. 7 (C) shows the state where the loading of the cartridge has been completed.

8 to 10 are partially enlarged cross-sectional views of the film guide section and the film leader section around the film introducing port after the camera is loaded into the camera, showing a state of being rolled in and fed out, as seen from the upper surface side of the camera. Shows a state in which the film leader is still exposed immediately after loading the cartridge, FIG. 9 shows a state in which the tip of the film leader is rewound to a predetermined position in front of the L sensor, and FIG. 10 shows the film leader as a pressure plate. The state of being fed into the gap (film feed path) between the mask plates is shown.

11 to 13 are cross-sectional views of the above-mentioned camera before and after loading a cartridge, as seen from the top surface of the camera, in which FIG. 11 shows before loading the cartridge and FIG. FIG. 13 shows a state in which the film leader portion is wound, and FIG. 13 shows a state in which the tip of the film leader portion reaches the spool chamber and is wound around the spool. FIG. 14 is a perspective view showing the configuration of the film feeding drive system of the camera as seen from the top side of the camera.

The camera 1 of the present embodiment is a perspective view of FIG.
As shown in the bottom views of FIGS. 2 and 3, it has a camera body 2 and a camera exterior 3 that covers the camera body 2.

The camera body 2 is mainly provided with a photographing lens 5
A lens barrel 4 having a built-in lens, a finder optical system (not shown), a film guide 13 which is a film guide member and also a patrone rotation stopping member, and a sprocket portion which is a feeding mechanism supported by the film guide 13. 51, a light-shielding member 17 and a sheet member 18 for the patrone display portion for displaying the side wall surface of the patrone (FIG. 11)
And a mask plate 61 (FIG. 11) having a rail portion (not shown) for guiding the film and an aperture opening 61a.
, Pressure plate 62 (FIG. 11), and film feeding drive system 20
(FIG. 14) and the like are incorporated.

Further, the camera body 2 has a cartridge chamber 2a in which a cartridge 95 can be loaded, and a spool chamber 2b in which a spool 14 for winding the film is incorporated.
Moreover, a display hole 2h is provided at a position facing the cartridge display window 11.

The camera exterior 3 mainly includes a finder eyepiece window portion 6, a release button (not shown), a rewind button (not shown), a power switch button (not shown), which can be opened and closed. Patrone chamber lid 7 and Patrone display opening 3b
There is provided a cartridge display window 11 of a cartridge display portion for displaying the sidewall surface of the cartridge fixed to the, a lid opening knob 10 and the like.

The patrone 95 is a patrone winding shaft (winding shaft) 95f for winding and accommodating a 135 type film (JIS standard) 96, and a patrone outer cylinder 95e.
It has a delivery port protrusion 95a having a film delivery port 95b, a long hub 95c, and a short hub 95d. The cartridge 95 can be loaded from the long hub 95c side in a state in which a film leader portion 96b (described later) is wound around an outer cylinder 95e in the cartridge chamber 2a. Incidentally, the posture at the time of loading is such that the patrone winding shaft 95f is along the Y0 direction (described later).

The film 96 is provided with a perforation 96a over its entire length, and the film cartridge winding shaft 9 is provided.
It is wound around 5f and held. The film leader portion 96b, which is the winding end portion of the film 96, is exposed to the outside from the cartridge outlet 95b when the cartridge is loaded. The tip of the film leader portion 96b is referred to as a leader tip 96c. Also, the film reader unit 9
In the vicinity of 6b, the long hub side film width end surface is defined as the width end surface 96d, and the short hub side film width end surface is defined as the width end surface 96e.

The cartridge chamber 2a has a cartridge 95.
The inner wall surface 2m of the cylinder, the wall surface 2d that is the first outlet wall portion and the wall surface 2e that is the second outlet wall portion,
It has a film guide inclined surface 2c which is formed at the entrance of the cartridge chamber 2a and serves as a first guide portion of the film reader portion 96b when the cartridge is loaded, and a cartridge chamber bottom surface 2k. The cartridge chamber 2a has a cylindrical inner wall surface 2
It is composed of a cylindrical space portion formed by m and a triangular columnar space portion formed by the wall surfaces 2d and 2e. The wall surface 2d is a surface inclined to the optical axis O side, and the wall surface 2e is a surface provided along the side surface of the lens barrel 4 and substantially parallel to the optical axis O.

The cylindrical inner wall surface 2m is a part of a cylindrical surface with the Y0 axis, which is an axis parallel to the direction (vertical direction of the camera body 2) substantially orthogonal to the optical axis O of the taking lens 5, as the central axis. Is. The cylindrical surface is larger than the outer cylinder 95e of the cartridge 95 and maintains the film insertion gap Sa (the space for the film reader).
It is possible to insert the film reader 96b in the state of being wound around 5e.

The wall surfaces 2d and 2e are substantially V-shaped wall surfaces continuous with the inner wall surface 2m, and are surfaces parallel to the Y0 direction.

The film guide slope 2c has a width end portion 96d of the film leader portion 96b when the cartridge 95 is loaded.
Is an inclined surface provided so as to easily slide toward the cylindrical inner wall surface 2m and the wall surfaces 2d and 2e, and Y
It is formed by a mortar-shaped curved surface (concave conical curved surface) that is inclined toward the axial center toward the bottom surface 2k of the cartridge chamber. The range where the inclined surface 2c is provided starts from the end portion of the inner surface 2m of the cylinder on the front surface of the camera body and reaches the wall surface 2d through the wall surface 2e.

On the bottom surface 2k of the cartridge chamber, there are a fork 12 which is a rewinding mechanism for rotationally driving the cartridge winding shaft 95f, and a cartridge removal urging spring 19 for urging the loaded cartridge 95 in the removal direction. It is arranged at a position on the Y0 axis. The fork 12 is a long hub 95c of the loaded cartridge 95.
Can be engaged with the spline part of.

Further, on the bottom surface 2k of the cartridge chamber and inside the wall surfaces 2d and 2m, a film guide 13 which is a second film guide portion and a sprocket portion 51 which is a film feeding mechanism are arranged. .

The patrone chamber lid 7 is rotatably supported at the left end portion (top in FIG. 1) of the camera exterior 3 via a support shaft 8. On the side of the patrone chamber of the patrone chamber lid 7, the patrone short hub 95d is fitted to the patrone 95.
A cartridge hub supporting projection 7a for rotatably supporting the
A lid closing claw 7b and a film pressing portion 7c are provided.

The lid closing claw 7b is inserted into the claw opening 2f of the camera body when the patrone chamber lid 7 is closed, and engages with the locking claw 9 in the camera body to keep the patrone chamber lid 7 in the closed state. To do. When the lid closing claw 7b engages with the locking claw 9, the CVSW (cover switch) 84 of the lid detecting means arranged near the locking claw is switched on (FIG. 15). In the lid closed state, the outer periphery of the patrone chamber lid 7 fits into the lid opening 3a of the camera exterior 3, and the light tight state of the patrone chamber 2a is maintained.

In order to open the patrone chamber lid 7, the lid opening knob 10 provided on the side surface of the camera exterior 3 is slid to release the engagement of the locking claw 9 and open the patrone chamber lid 7. be able to. When opening the lid,
The loading cartridge 95 is moved upward by the biasing spring 19 so that the cartridge 95 can be easily taken out.

The film pressing portion 7c is a convex portion on the side of the cartridge chamber, and is located on an extension line of the outer periphery of the sprocket portion 51 outside the film guide 13 with the cartridge chamber lid 7 closed (FIG. 3). ). The position of the film pressing portion 7c in the height direction (the film width direction, the winding axis direction) with the patrone chamber lid 7 closed matches the position of the width end surface 96e of the film 96 at the normal loading position. The film 96 in the normal loading position is
The perforations 96a of FIG. 4 can be engaged with the sprocket claws 56 (FIG. 4 (B)).

The film guide 13 and the sprocket part 51 for film delivery are in a direction parallel to the Y0 axis in a substantially triangular columnar space surrounded by the outer circumference of the cylinder, which extends the inner wall surface 2m of the cylinder, the wall surface 2d and the wall surface 2e. Placed in an upright position. As will be described later, the film guide 13 has an inclined surface 13a forming a substantially conical surface at its upper portion, and its apex 13b has an optical axis with respect to a straight line A parallel to the optical axis O as shown in FIG. It is located on a straight line B forming an angle θ 0 closer to O.

The sprocket portion 51 is rotatably supported inside the film guide 13 as will be described later, and is located at a film insertion gap Sc with respect to the surface of the pressure plate 62 on the side of the cartridge chamber.

The film guide 13 is fixed to the bottom surface 2k of the cartridge chamber 2a as shown in the sectional view of FIG. 4 (A), and has a substantially conical tip with an apex 13b on the opening side of the cartridge chamber 2a. It has a surface 13a. Further, as shown in the cross sectional view of FIG.
This is a first side surface that forms a film insertion gap Sc (a space for a film reader) so as to face d and a tip end portion of the pressure plate 62 (that is, a straight line portion connecting the film projecting port 95b of the loading cartridge and the film introducing port Sd). Outer wall surface 13g,
Film insertion gap S facing the wall surface 2e of the cartridge chamber
An outer wall surface 13h that is a second side surface that forms b (space for film leader), a cylindrical inner wall surface 13i that faces the outer cylinder 95e of the insertion cartridge, and a cutout portion (rotation restriction that faces the wall surface 2d of the cartridge chamber). Section, posture setting section) 13c.

In the space portion (space for outlet) formed by the wall surface 2d of the cartridge chamber and the cutout portion 13c,
Film outlet projection 95a of the cartridge 95 to be loaded
The cartridge 95 can be fitted in. The fitting of the projection 95a restricts the rotation of the cartridge 95 around the winding shaft 95f in the loaded state, so that the cartridge 95 is maintained in the loading posture. In addition, the delivery port 95b of the cartridge 95 in the loading posture described above.
The film feeding direction is inclined by a predetermined angle with respect to the pressure plate 62 toward the film introduction port Sd.

The outer wall surface 13g of the film guide 13,
The tip inclined surface 13a on the 13h side is the Patrone chamber inclined surface 2
The film reader section 96b of the cartridge 95 in cooperation with c
It functions as a guide to the inside of the cartridge chamber 2a during insertion. Further, the outer wall surface 13g, together with the pressure plate 62, is provided with a film leader portion 95 of the loading cartridge 95 as shown in FIG.
It functions as a guide portion that guides b from the film projecting port 95b to the film introducing port Sd (that is, the gap portion formed by the pressure plate 62 and the mask plate 61).

Further, the cylindrical inner wall surface 1 of the film guide 13
The tip inclined surface 13a on the 3i side is inserted into the space formed by the delivery port projection 95a of the cartridge 95, the cartridge outer cylinder 95e, and the film leader portion 96b wound around the cartridge, thereby allowing the cartridge 95 to move. Patrone room 2
It serves as a guide surface for loading into a. The inner wall surface 13i of the cylinder functions as a positioning portion for the outer cylinder 95e of the loading cartridge 95.

On the other hand, inside the film guide 13, as shown in FIG. 4A, a concave portion 13e for accommodating the sprocket portion 51 and a bearing portion 13 for supporting the sprocket shaft portion.
d and a sprocket claw escape portion 13f are provided.

As shown in the exploded perspective view of FIG. 5, the sprocket portion 51 has a sprocket drive shaft 53, a sprocket driven shaft 52, a sprocket cylinder 54, and a pawl spring 55.
And four sprocket claws (sprocket) 56.

The sprocket drive shaft 53 has a support shaft portion 53a fitted to the bearing portion 2h of the camera body 2, a sprocket gear portion 53d, and a sprocket tube projection 54b.
Recess 53b that fits in and the escape portion 53c of the claw spring 55
And a shaft body portion 53e.

The sprocket driven shaft 52 has a support shaft portion 52 fitted to the bearing portion 13d of the film guide 13.
a and a recess 52b that fits into the sprocket tube protrusion 54a
And a screw hole 52c and a shaft portion 52d.

On the sprocket cylinder 54, an engaging projection 54b which fits into the recess 53b of the sprocket drive shaft and an engaging projection 54 which fits into the recess 52b of the sprocket driven shaft.
a and the claw hole 5 into which the sprocket claw 56 is freely inserted and retracted
4c are provided.

The claw spring 55 is provided with an arm portion 55c having an elastically deformable spring function extending in the axial direction, a claw mounting hole 55b provided at the tip of the arm portion, and a screw insertion hole 55a. The claw spring 55 is fixed to the sprocket driven shaft 52 with a screw 57 in a screw hole 52c.

The sprocket claws 56 are provided with a pair of perforation engaging surfaces 56a on the left and right surfaces in the rotating direction, a pair of inclined surfaces 56b on the upper and lower surfaces in the axial direction, and a mounting pin portion 56c. This sprocket claw 56
Is fixed to the claw attachment hole 55b of the claw spring 55.

When the film is brought into contact with the inclined surface 56b of the sprocket pawl 56 from the film end surface or from the axial direction by perforation and pressed, the pawl spring 55 is elastically deformed via the pawl 56. Due to the elastic deformation, the sprocket claw 56 retracts into the claw hole 54c of the sprocket cylinder, and the film end surface or the perforation of the film can move on the sprocket cylinder. However, when the sprocket claw 56 is fitted around the perforation 95a and rotates around the axis, the claw spring 55 is not deformed and the sprocket claw 56 does not retract.

The sprocket drive shaft 53, the sprocket cylinder 54, and the sprocket driven shaft 52 to which the pawl springs 55 are fixed have respective shaft bodies 52d and 53e connected to the sprocket cylinder 5.
4 is press-fitted into the cylindrical portion to be fixed, or fitted together without a gap, and integrated. In the integrated state, the sprocket claw 56 is held in a state of protruding from the claw hole 54c of the sprocket cylinder 54. The outer peripheral surface of the sprocket cylinder 54 is treated to have a high light reflectance, and sufficiently reflects the light from the L sensor 74.

The sprocket portion 51 having the above-described structure is provided with the film guide 13 and the bearing portion 13 on the bottom surface 2k of the cartridge chamber as shown in the sectional views of FIGS. 4 (A) and 4 (B).
It is rotatably supported and incorporated in d and 2h. In the assembled state, the sprocket portion 51 is arranged such that the outer periphery of the sprocket cylinder 54 contacts the extended surfaces of the outer wall surfaces 13h and 13g of the film guide 13 as shown in the transverse sectional view of FIG.

The sprocket gear portion 53d of the sprocket portion 51 meshes with the gear 37 of the feeding drive system of the film feeding drive system 20, which will be described later. Further, as shown in the cross-sectional view of FIG. 4A, the pressure plate 62 is provided with a cutout portion 62a at a position facing the sprocket pawl 56, which is a portion corresponding to the rotation locus of the sprocket pawl 56. . Further, an L sensor 74 which is a position detecting PR (photoreflector) for detecting the leading end 96c of the film leader portion at a position above the cutout portion 62a and an opening 62d therefor.
Are arranged. The L sensor 74 is supported and arranged by the flexible printed circuit board 74a.

The mask plate 61 and the pressure plate 62 are arranged on the image plane side of the taking lens barrel 4 as shown in the sectional view of FIG. The mask plate 61 is provided with an aperture opening 61a. The gap between the mask plate 61 and the pressure plate 62 serves as a film feed path that leads from the cartridge chamber 2a to the spool chamber 2b. The end of the film feeding path on the side of the cartridge chamber becomes the film introduction port Sd.

A PR (photoreflector) L sensor 74, which is a film front end detecting means, is arranged at a position of the pressure plate 62 facing the sprocket portion 51, and a film perforation 9 is provided at an end of the pressure plate 62 on the spool chamber 2b side.
A P (photoreflector) P sensor 75 for detecting passage of 6a is arranged.

Further, the aperture opening 61 of the mask plate 61
A movable block 15 is provided at the end of a on the spool chamber 2b side, as shown in the sectional view of FIG. The movable block 15 has a film reader portion 96b that is fed.
Is a guide means for preventing the tip 96c of the lens barrel from being caught in the lens barrel side, and is interlocked with the forward / backward movement of the taking lens barrel 4.

That is, the movable block 15 is located inside the aperture opening 61a of the mask plate 61 as shown in FIG. 11 when the lens barrel 4 is in the storage position (or non-photographing position). When the lens barrel 4 is extended to the photographic position on the lens barrel openings 2p and 3c, it is assumed that the lens barrel 4 is retracted out of the photographic optical path in conjunction with its movement.

In the cartridge chamber 2a of the camera body 2, as shown in the sectional view of FIG. 11, a DX contact piece 7 formed of an electric contact piece which is elastically deformable in the radial direction on a cylindrical inner wall surface 2m.
3 is arranged, when the cartridge 95 is loaded, the DX contact piece 73 comes into contact with the cartridge outer cylinder 95e, and D
It becomes possible to read the X code. The DX contact piece 7
The output of 3 is also used as a cartridge loading detection signal.

Further, in the spool chamber 2b of the camera body 2, there is arranged a rotatable film guide plate 64 which is biased toward the spool 14 by a weak biasing force. The film guide plate 64 is provided on the spool 14 when the film 96 is fed into the spool chamber 2b.
Has the function of wrapping around. The spool 14 has a plurality of claws 14a, hooks the film perforation 96a, and is wound around this spool.

As shown in the perspective view of FIG. 14, the film feeding drive system 20 includes a drive source including a drive motor 72, a switching drive system (switching mechanism) including a planetary gear mechanism such as the sun gear 25, and a fork. A rewinding drive system (rewinding mechanism) including the gear 30 and the one-way clutch 3
4, a delivery drive system (delivery mechanism) including the sprocket gear 53d and the like, and a winding drive system (winding mechanism) including the spool gear 31.

The drive motor 72 has a motor shaft 21 protruding at both ends thereof, and the motor pinion 22 and the encoder plate 4 are provided at the respective shaft ends of the motor shaft 21.
2 is stuck. The rotation of the motor pinion 22 is performed by the gear 23, the large gear 24a of the two-stage gear, and the small gear 24b.
Is transmitted to the sun gear 25 via. The rotation of the encoder plate 42 is detected by an M sensor 76 composed of a photo interrupter (PI).

The planetary gear mechanism comprises a sun gear 25, a carrier 26, and a planetary gear 27. Carrier 26
Are rotatably supported by the shaft portion of the sun gear 25, and the planet gears 27 mesh with the sun gear 25 while being rotatably supported by the carrier 26. Therefore, when the sun gear 25 rotates in the + D2 direction, the carrier 2
6 also rotates in the + D2 direction, so the planet gear 27 is in the gear 3
It meshes with the 2 side. When the sun gear 25 rotates in the -D2 direction, the carrier 26 also rotates in the -D2 direction, so that the planetary gear 27 meshes with the gear 28 side.

The rewinding drive system comprises a gear 28, a gear 29, and a fork gear 30 supported by the fork 12, and the rotation of the gear 28 is transmitted to the fork 12 via the gear 29.

The delivery drive system includes a one-way clutch drive side gear 33 meshing with the gear 32, a one-way clutch 34, a one-way clutch driven side gear 35,
It includes a gear 36, a gear 37, and a sprocket gear 53d.

When the drive-side gear 33 rotates in the D5 direction (when the film is being sent out by the sprocket portion 51), the one-way clutch 34 is engaged and the rotation of the drive-side gear 33 is transmitted to the driven-side gear 35. Then, the sprocket gear 53d is rotationally driven in the D6 direction. When the sprocket gear 53d is rotationally driven at a higher speed and the driven gear 35 rotates relatively faster in the D5 direction than the drive gear 33 (the film is wound by the spool 14), the one-way clutch 34 Is released, the drive side gear 33 and the driven side gear 3
5 rotate independently of each other.

The hoisting drive system includes a gear 32, a two-stage large gear 39a and a small gear 39b, a gear 40, a gear 41, and a spool gear 31 provided on the spool 14.
Consists of. The rotation of the gear 32 in the D4 direction is transmitted to the spool gear 31 via the above gears.

In the film feeding drive system 20 described above, during the film rewinding operation, the drive motor 72 is
The sun gear 25 of the planetary gear mechanism is rotated in the -D2 direction by rotating in the clockwise direction (CW direction). The rotation of the sun gear 25 in the -D2 direction causes the planet gear 27 to move to the gear 28.
The fork gear 30 is rotatably driven in the D3 direction via the gear 28 by meshing with the side (first state). The rotation of the fork gear 30 causes the winding shaft 95f of the loading cartridge 95 to rotate.
Is rotated in the D3 direction, and the film 96 is rewound into the cartridge.

Further, during the film feeding operation, the drive motor 72 rotates in the counterclockwise direction (CCW direction) to rotationally drive the sun gear 25 of the planetary gear mechanism in the + D2 direction. The rotation of the sun gear 25 in the + D2 direction causes the planetary gear 27 to mesh with the gear 32 (second state), and the gear 3
The drive-side gear 33 is rotationally driven in the D5 direction via 2. The rotation is transmitted to the driven gear 35 via the one-way clutch 34, and the sprocket gear 53d is moved to D6.
Rotate in the direction. The sprocket part 51 is rotated in the D6 direction by the rotation of the sprocket gear 53d, and the film 96 is sent to the spool 14 side through the sprocket claw 56 and the perforation 96a. At that time, the spool gear 31 is also rotating in the D7 direction at the same time.

During the film winding operation, the drive motor 72 rotates in the counterclockwise direction (CCW direction) to rotationally drive the sun gear 25 of the planetary gear mechanism in the + D2 direction. The rotation of the sun gear 25 in the + D2 direction causes the planetary gear 27 to mesh with the gear 32 (second state), and the gear 3
2 rotates in D4 direction. The rotation of the gear 32 is transmitted to the spool gear 31, and the spool 14 is rotationally driven in the D7 direction.

At this time, if the leader portion 96b of the film 96 has reached the spool 14 side by the above-mentioned film feeding operation, the film 96 is wound up on the spool 14 rotating in the D7 direction.

The gear drive system is set so that the winding speed of the film 96 by the spool 14 at the time of winding the film is higher than the speed of the sprocket portion 51 driven through the one-way clutch 34. The sprocket part 51 is rotationally driven in the direction D6 by the film 96 wound up through the perforations 96a.

At this time, the rotational speed of the one-way clutch driven side gear 35 in the D5 direction is higher than the rotational speed of the one-way clutch driving side gear 33 driven through the gear 32 in the D5 direction. Therefore, the connection of the one-way clutch 34 is released, and the delivery drive system including the sprocket portion 51 is driven through the film without any trouble.

Next, the configuration of the electric control system of the camera 1 of this embodiment will be described with reference to the block diagram of the electric control system of FIG. In the camera 1 of the present embodiment, a CPU 71 that is a control circuit that controls the entire camera, a drive motor 72 for driving the film feed and a lens barrel moving forward and backward, and a rotation amount of the drive motor 72 are detected. An M sensor 76 which is a PI (photo interrupter), an L sensor 74 which is a PR (photo reflector) of a film leading edge detecting means for detecting the position of the leading edge 96c of the film leader portion,
A sensor for reading a DX code of the loaded cartridge 95, a DX contact piece 73 that also functions as a cartridge loading detection means, and a PR (photoreflector) that detects the feed amount of the film 96 by passing through the perforations 96a. A motor rotation detection circuit 78 that receives the outputs of the P sensor 75 and the M sensor 76 and outputs a motor rotation amount signal to the CPU 71, and a cartridge that receives the output from the DX contact piece 73 and outputs a cartridge loading signal to the CPU 71. The outputs of the detection circuit 79 and the L sensor 74 are fetched and a film leader end position detection signal is sent to the CPU 7.
The film reader detection circuit 80 for outputting to 1 and the output of the P sensor 75 are taken in to output the film movement amount signal to the CPU.
71 and a perforation detection circuit 81 for outputting to C
Drive motor 72 based on the film feed output of PU 71
And a film feeding circuit 77 for driving the.

Further, in the camera 1, a PWSW (power switch) 83 which is a power switch, a CVSW (cover switch) 84 which is a lid detecting means for detecting the closed state of the lid of the cartridge chamber, and a release button of one stage. 1RSW (release first-stage switch) 85 that is turned on by the eye operation, and 2RS for starting exposure that is turned on by the second-stage operation of the release button
W (release second stage switch) 86 and RWSW (rewind switch) 8 for instructing midway rewinding of the film
7, a switch input circuit 82 for taking in the output of the switch group and outputting it to the CPU 71, a display circuit 88 for taking in display information by the CPU 71, a liquid crystal display unit 89 driven by the display circuit 88 and displaying the display information, An LED display unit 90 and a non-volatile memory 91 are built in.

The CPU 71 has a ROM 71a in which a processing program for controlling each control element in the camera is stored and an RA for storing data for photographing.
M71b, timer circuit 71c, counter circuit 71d
And an A / D converter circuit 71e and the like.

Further, the display circuit 88 takes in information display signals such as photographing mode information, film counter information, date information and the like and information display signals of the strobe state by the CPU 71, and the liquid crystal display section 89 and the LED display section 90 are provided with the above-mentioned respective signals. Display information.

The non-volatile memory 91 stores various photographing conditions and setting information for setting the photographing conditions. For example, the original photographing conditions can be reset even when the battery is replaced.

Next, in the camera of the present embodiment having the above-mentioned structure, the cartridge 95 with the film reader portion 96b exposed is loaded into the cartridge chamber 2a. After the loading, the film is automatically loaded. That is, the film leader portion 96b is once rewound into the cartridge, leaving only the tip portion thereof. And
The film leader portion 96b is sent out toward the spool chamber 2b side and wound up by the spool 14, and the loading of the film is completed. It should be noted that all of these auto-loading processing operations are controlled by the CPU 71 which is a control circuit.

In the following, regarding the loading operation to the film loading operation, the flow chart of the auto-loading processing of FIG. 16 and the time chart of FIG. 17 will be used, and the loading process will be described with reference to FIGS. 4 (A) and 4 (B). The sectional view, the perspective view of FIG. 7, etc. are used, and the film loading process is shown in FIG.
The description will be made with reference to sectional views of FIGS.

When the cartridge 95 is loaded, the PSWW 83, which is a power switch, is turned on and the cartridge chamber lid 7 of the camera exterior 3 is opened by operating the lid opening knob 10 with the camera bottom side facing upward. At this time, the L sensor 74 projects light onto the sprocket cylinder 54, receives the reflected light, and becomes H. As shown in FIGS. 6A and 6B, the long hub 95 is inserted into the cartridge chamber 2a along the Y0 axis. The cartridge 95 is inserted toward the cartridge chamber 2a while sliding the width end portion 96d of the film leader 96b on the film guide inclined surface 2c as shown in FIG. 6B. It should be noted that the tip 96c of the film leader portion 96b on the cartridge outer cylinder needs to be positioned within the range of the allowable range mark 2g on the camera body 2 (see FIG. 2).

Further, the cartridge 95 is set in the cartridge room 2
As it is inserted into the film a, the film leader 96b is inserted into the film guide inclined surface 2 as shown in FIGS.
c and / or the slope 13a of the film guide 13
While sliding up, the gap Sc between the pressure plate 62 and the outer wall surface 13g of the film guide 13 and the wall surface 2e of the cartridge chamber
Sb between the outer wall surface 13h of the film exterior 13 and the inner wall surface 2m of the cartridge chamber cylinder and the cartridge outer cylinder 95.
e is inserted into the gap Sa. The film reader 95b is provided in the gap Sc between the pressure plate 62 and the outer wall surface 13g of the film guide 13.
The state in which is inserted is shown in the sectional view of FIG.

At the same time, the delivery port projection 95a of the cartridge 95
Is inserted while being guided between the wall surface 2d of the cartridge chamber and the notch portion 13c of the film guide portion 13.

Then, when the cartridge cover 7 is closed, the claw 7b is locked by the locking member 9 and the cover is closed. The patrone 95 is positioned at the short hub 95d side of the patrone by the hub supporting protrusion 7a of the patrone chamber lid, and at the same time, is inserted to a predetermined loading position on the bottom side of the patrone chamber.

When the cartridge compartment lid 7 is closed as described above, a lid closing signal is output from the lid closing state detecting CVSW 84, and the automatic loading process of FIG. 16 described later is started.

In the process of inserting the cartridge, the width end portion 96d of the film leader portion 96b is changed to the sprocket portion 51.
When contacting the inclined surface 56b of the sprocket claw 56, the claw spring 55 elastically deforms, the sprocket claw 56 retracts into the sprocket cylinder 54, and the film leader portion 96b moves on the sprocket cylinder 54 along the axial direction. It will be possible.

When the cartridge 95 is simply inserted into the cartridge chamber 2b, the film 96 is not completely inserted in the width direction of the leader portion 96b due to the resistance force of retracting the sprocket claws 56, for example, as shown in FIG. There may be a state where the width direction (axial direction) position of the film 96 as shown in the sectional view of A) is not in a normal loading position capable of engaging with the sprocket claw. In such a case, the cartridge cover 7
By closing, the width end surface 96e of the film 96 is pressed downward (upward in FIG. 4A) by the tip of the film pressing portion 7c. By this pressing, as shown in FIG. 4B, the film 96 moves to a normal loading position where the perforations 96a can engage with the sprocket claws 56.

When the cartridge 95 is inserted to the predetermined loading position in the cartridge chamber 2a as described above, FIG.
As shown in FIGS. 7B and 7C, the perforations 96 a of the film 96 fit into the patrone claws 56.
Further, the cartridge long hub 95c engages with the fork 12.

If the perforation 96a and the sprocket claw 56 are displaced depending on the position of the film 96 in the feeding direction, the film 96 cannot be fitted in. In that case, the film leader portion 96b is inserted during the initial rewinding process, which will be described later, and becomes the engaged state. Similarly fork 12
Depending on the rotational position, the cartridge long hub 95c and the fork 12 are not necessarily in the engaged state, but in that case, they are engaged during the initial rewinding process of the film leader portion 96b, which will be described later, and are in the engaged state.

In the loaded state, the delivery projection 95a of the cartridge 95 is fitted between the wall surface 2d of the cartridge chamber and the cutout portion 13c of the film guide portion 13 so that the rotation around the winding shaft 95f is restricted. Further, the film leader portion 96b is held in a state of being inserted into a gap Sc with the pressure plate 62, a gap Sb with the wall surface 2e of the cartridge chamber, and a gap Sa with the inner wall surface 2m of the cartridge chamber cylinder.

When the cartridge 95 is inserted and the cartridge chamber lid 7 is closed as described above, the CVS for detecting the lid closed state is detected.
A lid closing signal is output from W84 and the signal is sent to the CPU7.
16 is taken in and interrupted, and the autoloading process of FIG. 16 is started.

First, in step S1, the loading state of the cartridge is checked. That is, the Patrone detection circuit 79 takes in the signal from the DX contact piece 73, and the loading detection output thereof is fetched into the CPU 71 to confirm the loading of the Patrone 95. If the Patrone chamber lid 7 is not loaded and the Patrone chamber lid 7 is closed, the process jumps to Step 2 and the HALT state, that is, CP
U71 is maintained in the stopped power-saving state as the process of entering the sleeve state.

In practice, as soon as the patrone chamber lid 7 is closed, the patrone 95 is in the fully loaded state, and a loading detection output is output. Therefore, the process immediately proceeds to step S3. In the time chart of FIG. 17, the patrone chamber lid 7
It is assumed that the loading detection signal is output at substantially the same time at the elapsed time t1 when the drive motor 7 of step S3 is closed.
It is assumed that driving in the CW direction 2 is started. In addition,
Elapsed time t before time t1 on the time chart
At 0, the L sensor 74 detects the film reader portion 96b with the insertion of the cartridge 95, so that the detection output is an L (low level) signal.

In step S3, the reverse rotation of the drive motor 72 (rotation in the CW direction) is started. With this rotation, the planetary gear 27 of the planetary gear mechanism meshes with the gear 28 side, and rotationally drives the fork gear 30 in the D3 direction. The rotation of the fork gear 30 in the D3 direction causes the winding shaft 9 of the cartridge 95 to rotate.
5f rotates in the rewinding direction and starts rewinding the exposed film leader portion 96b inward of the cartridge 95. Then, during the rewinding, the sprocket portion 51 is freely rotatable and is driven and rotated by the film perforation 96a. Therefore, the movement of these drive systems is not hindered, and the movement of the film is not stopped and the perforations are not cut off.

In the rewinding process, the leading edge 96c of the film leader portion 96c at the elapsed time t2 on the time chart of FIG.
It is shown that an H (high level) signal is output from the L sensor 74 when the position reaches the position of the L sensor 74.

In step S4, the film edge (film tip 96
c) When the arrival is detected, the process proceeds to step S5, the counter 71d starts counting the number of output pulses of the M sensor 76, and it is checked that a predetermined number of pulses Pa are output.

When the output of the predetermined output pulse number Pa is detected in step S5, the process proceeds to step S6. That is, after reaching the film edge, when the film leader portion 96b is exposed in a substantially straight line from the film delivery port 95b as shown in the cross-sectional view of FIG. 9, the sprocket claws 56 are still perforated. 96a is maintained in the engaged state), step S6
To the forward rotation direction (CCW
Direction).

On the time chart of FIG. 17, the output pulse number Pa is detected at the elapsed time t3, and the rotation direction of the drive motor 72 is switched to the CCW direction as described later.

In step S6, the drive motor 72
Is forward (CC) as shown in the time chart of FIG.
It is switched and driven in the (W direction rotation) direction. That C
The planetary gear 27 of the planetary gear mechanism is rotated along with the rotation in the CW direction.
Switches to a state of meshing with the gear 32 side. Gear 32
Rotates in the D4 direction, and the sprocket gear 53d is rotationally driven in the D6 direction via the one-way clutch 34.
The rotation of the gear 32 in the D4 direction is also transmitted to the spool gear 31, and at the same time, the spool 14 is rotationally driven in the D7 direction.

When the sprocket gear 53d rotates in the D6 direction, the sprocket part 51 rotates in the same direction, and the film leader part 96b exposed from the film feed port 95b is moved from the state shown in FIG. 9 to the pressure plate 62 and the mask plate 61. It is sent out toward the film introduction port Sd between. On the way, the output of the L sensor 74 is switched from H to L as shown in the time chart of FIG. 17 because the film front end 96c passes.

When the drive motor 72 continues to rotate in the CCW direction, the tip 96c of the film leader portion 96b passes through the film feed path between the pressure plate 62 and the mask plate 61, as shown in the sectional view of FIG.

Thereafter, when the leading end 96c of the film leader portion reaches the spool chamber 2b, the film leader portion 96b winds around the spool 14 as shown in the sectional view of FIG. 13, so that the film 96 is wound at the speed of the spool 14. become. The film feeding speed by the spool 14 is set to be higher than the speed at which the sprocket portion 51 is driven via the one-way clutch 32 as described above. Therefore, the film is wound while the one-way clutch 32 is disconnected.

After the film leader 96b reaches the position of the P sensor 75 on the spool chamber side in the film feeding process, a perforation passage pulse signal is output from the P sensor 75, and the counter 71d starts counting the number of pulses. To be done.

In step S7, the number of perforation passing pulses is checked. When the film 96 is wound around the spool 14 by a predetermined amount and the number of perforation passing pulses reaches the predetermined pulse number Pb, it is determined that the first frame of the film 96 is set, and the automatic loading of the film 96 is completed. And the drive motor 72
The rotation of is stopped and this routine ends.

In the time chart of FIG. 17, it is shown that the predetermined pulse number Pb is reached at the elapsed time t4 and the autoloading is completed.

When the photographing of all the frames of the loaded cartridge 95 is completed, or when the RWSW 87 instructs the midway rewinding, when the drive motor 72 is rotationally driven in the CW direction, the rewinding state described above is obtained, and the film 9
6 is rewound into the cartridge 95.

Therefore, when the lid opening button 10 is operated to open the patrone chamber lid 7, the patrone take-out urging spring 1
The urging force of 9 causes the cartridge 95 to pop out to the opening side of the cartridge chamber to a position where it can be taken out, so that it can be taken out easily. At this time, the film reader portion 96b
Is completely caught in the cartridge 95, and the engagement between the sprocket claw 56 and the perforation 96a is disengaged, so that there is no problem when taking out the cartridge 95 from the cartridge chamber 2a.

Further, for example, when the cartridge 95 before use is once loaded into the cartridge chamber 2a and taken out before the automatic loading, even if the perforation 96a is engaged with the sprocket claw 56 at the time of taking out, the perforation 96a When 96a moves in the axial direction, the inclined surface 56b of the sprocket pawl is pressed to retract the sprocket pawl 56 inward and the engaged state is released, so that the cartridge 95 can be taken out without any problem.

According to the camera of the present embodiment described above, when the cartridge 95 is loaded, the cartridge chamber 2 with the film reader portion 96b wound around the cartridge is used.
It can be loaded by simply dropping it into b. In particular, even when the film 96 is just inserted, the film 96 is displaced from the normal loading position in the film width direction (winding axis direction) in which the sprocket claws 56 can be engaged, even if the film 96 is displaced. By closing the lid 7, the film 96 can be pushed into the normal loading position by the film pressing portion 7c.

[0101]

As described above, according to the present invention, in the camera in which the film cartridge in which the film leader projects from the delivery port can be loaded, the end surface of the film leader section is normally pressed by the film pressing section provided on the cartridge cover. It is possible to provide a camera capable of surely loading a film by moving it to a different position.

[Brief description of drawings]

FIG. 1 is a perspective view of a camera according to an embodiment of the present invention viewed from a bottom surface side.

FIG. 2 is a bottom view of the camera of the one embodiment, showing a state in which the cartridge cover is opened.

FIG. 3 is a bottom view of the camera of the one embodiment, showing a state in which the cartridge is loaded and the cartridge cover is opened.

FIG. 4 is a cross-sectional view of the film guide portion and the sprocket portion for feeding the film of the camera of the one embodiment, showing a process of inserting the film leader portion when the cartridge is loaded, and FIG. FIG. 4B shows an initial state of insertion, and shows a state in which the sprocket claw is engaged with the perforation of the film leader portion and the insertion of the film leader is completed.

FIG. 5 is an exploded perspective view of a sprocket portion for feeding a film, which is incorporated in the camera according to the embodiment.

FIG. 6 is a perspective view showing a process of loading a cartridge in the cartridge chamber in the camera of the one embodiment.
FIG. 6A shows a state before loading the cartridge, and FIG.
(B) shows a state in the middle of loading the cartridge.

FIG. 7 is a perspective view showing a process of loading a cartridge in the cartridge chamber in the camera of the one embodiment.
7A and 7B show a state in the middle of loading the cartridge, and FIG. 7C shows a state where the loading of the cartridge has been completed.

FIG. 8 is a partial enlarged cross-sectional view of the film guide section and the film introduction port around the camera as seen from the camera upper surface side after the cartridge is loaded in the camera of the one embodiment, in which the film leader section is still exposed immediately after loading the cartridge. Shows the state.

FIG. 9 is a partially enlarged cross-sectional view of the camera according to the embodiment described above, which is seen from the upper side of the camera around the film guide section and the film introduction port after the cartridge is loaded, and the tip of the film leader section is a predetermined area in front of the L sensor. The state of being rewound to the position is shown.

FIG. 10 is a partially enlarged cross-sectional view of the film guide section and the film introduction port around the camera upper surface side after the cartridge is loaded in the camera of the one embodiment, in which the film leader is a gap between the pressure plate and the mask plate (film. The state of being fed into the feeding path) is shown.

FIG. 11 is a transverse cross-sectional view of the camera of the one embodiment seen from the top surface side of the camera, showing a state before loading the cartridge.

FIG. 12 is a transverse cross-sectional view of the camera of the above-described embodiment as seen from the top side of the camera, showing a state in which the film reader unit is wound after the cartridge is loaded.

FIG. 13 is a transverse cross-sectional view of the camera of the above-described embodiment as seen from the top surface side of the camera, showing a state in which the film leader unit is wound around a delivery spool after loading the cartridge.

FIG. 14 is a perspective view showing a configuration of a film feeding drive system of the camera of the one embodiment as seen from the top surface side of the camera.

FIG. 15 is a block configuration diagram of an electric control system of the camera of the one embodiment.

FIG. 16 is a flowchart of film loading processing in the camera of the one embodiment.

FIG. 17 is a time chart in the film loading process in the camera of the one embodiment.

[Explanation of symbols]

2a ... Patrone room 7: Patrone chamber lid 7c: Film holding part 56 sprocket claws (sprocket) 95 ...... Patrone 96 ...... Film 96a ... Perforation 96b ... Film reader section

Claims (3)

[Claims] 1. A camera having a winding shaft around which a film is wound and in which a film cartridge in which a film leader projects from a delivery port can be loaded, in a state in which the film reader projects from the delivery port. The cartridge chamber that can be inserted and removed in the winding axis direction, the cartridge chamber lid that can be moved between a position where the cartridge chamber is opened and the position where the cartridge chamber is closed, and the film leader end surface provided on the cartridge chamber cover A film pressing part which can be contacted, and when the patrone chamber lid is moved from the open position to the closed position after the film patrone is loaded in the patrone chamber, the film pressing part contacts the end face of the film leader. Therefore, the camera is characterized in that the film reader can be inserted into the cartridge chamber. 2. A sprocket that is provided inside the patrone chamber and can drive the film by engaging with perforations of the film,
When the patrone chamber lid is moved from the open position to the closed position after the film cartridge is loaded into the patrone chamber, the film pressing portion abuts on the end face of the film leader, whereby the perforation of the film engages with the sprocket. The camera according to claim 1, wherein the camera is inserted in a position where it can be fitted. 3. The camera according to claim 1, wherein the film pressing portion is a convex portion protruding from the patrone chamber lid toward the patrone chamber.