JPH1048722A - Spool parking device for self-driving type film cartridge camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a spool parking device with a mechanically simple structure by moving a spool driving locking means to a locking position and locking a spool driving means in the case film feeding amount is zero. SOLUTION: When a film feeding dial rotates in a rewinding direction, the film is rewound, so that the photographing number of a film number board 80 becomes zero. In the condition, phase relation that the second engagement part 59 of the spool parking lever 50 is not controlled by the inside peripheral wall 86 of a turning control rib 85 is obtained. The lever 50 rotates counterclockwise centering the bearing hole 51a by the pressing force of a tension spring 111, and the end face of a first engaging part 54 abuts on the gear outside peripheral surface 207 of a cartridge spool driving gear 205 so as to be locked. The gear 205 further rotates, and the part 54 is engaged with an engaging recessed part 209, so that the rotation of the gear 205 is locked, and the spool parking is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a spool parking device for a self-propelled film cartridge camera.

[0002]

2. Description of the Related Art In recent years, self-propelled film cartridges have been put to practical use. This film cartridge usually contains the film completely inside the cartridge, and when loaded into the camera, rotates the spool in the cartridge to send the film out of the cartridge and winds it on the film take-up spool provided in the camera body. After that, the film is wound up by rotation of the winding spool. One example is shown in FIG. 15 and FIG. This film cartridge 10
The film F is wound around a cartridge spool 12 rotatably housed in a cylindrical housing 11. In the cartridge spool 12, a substantially cylindrical spool drive bearing hole 12 a formed at one end thereof faces a housing opening 11 a provided at one end surface of the housing 11. The open end face of the spool drive bearing hole 12a is provided with an inclined surface 13 that slopes downward from the outer circumference toward the inner circumference, and a key groove 14 is formed in the inner circumferential wall of the spool drive bearing hole 12a in the axial direction from the open end face. .

[0003] On one side surface of the housing 11, a film entrance 15 is provided in the longitudinal direction of the housing 11. The film access opening 15 is provided with the film access opening 1.
5 is provided with a light-shielding door 17 for shielding the film F in the housing 11 from light exposure by shielding light. The light-shielding door 17 is a plate-like member that is rotatably supported in the housing 11 by a light-shielding door operating shaft 17a and that opens and closes the film entrance 15 by the rotation. Shade door operating shaft 17a
Is formed with an engagement notch 17b.

Further, an end surface (upper surface) 11 of the housing 11 is provided.
b, a sensor window 19 is formed, and the data disk 18 rotated integrally with the cartridge spool 12
Part of the sensor window 19 is exposed. A bar code indicating the exposure length of the film F, the film sensitivity, the type of the film, and the like is formed on the flat surface of the data disk 18. On the other hand, as shown in FIG. 16, an exposure state indicator 16 indicating the exposure state of the film F is provided on an end surface (bottom surface) 11c of the housing 11. The exposure display 16 has a display hole 16a indicating, for example, each stage of unexposed, partially exposed, exposed, and developed. The rotary display plate 12b formed at one end of the cartridge spool 12 opposite to the bearing hole 12a is located below the display hole 16a corresponding to the exposure state, so that the exposure state of the film cartridge 10 is visually detected. I can do it.

When the film F is rewound and stored in the film cartridge 10 after the photographing is completed, the rotation of the cartridge spool 12 is locked at a predetermined position so that the exposure state indicator 16 indicates the exposure state of the film F (spooling). Parking). In a camera of a type that uses a motor to feed the film F and reads the barcode of the data disk 18 with an optical sensor or the like,
The rotation position of the data disk 18 exposed from the sensor window 19 is read by the optical sensor and the motor is controlled to lock the cartridge spool 12 (spool parking). On the other hand, in a camera that does not include this type of control circuit, it is necessary to mechanically perform the locking operation of the cartridge spool 12.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is a self-propelled film cartridge camera capable of locking the rotation of a spool provided in a cartridge only when a film is rewound. It is an object of the present invention to obtain a spool parking device having a mechanically simple structure.

[0007]

SUMMARY OF THE INVENTION A spool parking device according to the present invention is a spool for rotating a spool of a film cartridge in a camera using a self-propelled film cartridge for rotating a spool around which a film is wound and feeding the film from the cartridge. A driving means; a spool driving locking means movable to a position where the rotation of the spool driving means is locked and a position permitting the rotation; a film number detecting means for detecting an amount of film fed from the film cartridge; And a spool parking means for locking the spool driving means by moving the spool driving locking means to the locking position when the film feeding amount by the film number detecting means is zero. I do.

The spool driving means has an internal gear formed coaxially and integrally with the spool driving shaft, and has an engaging recess on the outer peripheral surface of the gear which is engaged with and disengaged from the spool driving locking means. Is desirable.

The film number detecting means engages with a perforation provided on the film, and rotates by a predetermined number of teeth for each photographing frame as the film is fed and rewound; And a substantially disc-shaped film number plate that rotates by a predetermined amount for each shooting frame in response to the rotation of
A substantially annular rib provided on one surface side of the film number plate and substantially coaxially with the number plate, and restricting movement of the spool drive locking means to the locking position by an inner peripheral wall; When the value is zero, it is preferable that the rib be provided with a communication hole provided in the rib with a phase in a rotational direction allowing release of the regulation of the inner peripheral wall and movement of the spool drive locking means to the locking position.

When rewinding the film, when the film feed amount becomes zero and the spool drive locking means comes into contact with the outer peripheral surface of the internal gear, the gear is further rotated in the rewind direction. Preferably, the engagement between the spool drive locking means and the engagement recess of the internal gear is performed.

In addition to the above configuration, it is preferable to provide a parking releasing means for releasing the rotation locked state of the spool driving means by an external operation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiments. 1 and 2 are a front view and a plan view showing an arrangement state of a film feeding mechanism of a lens shutter type camera 20 to which a shutter charging device according to the present invention is applied, and FIG. 3 shows a rear side of the camera 20. It is a perspective view. The film cartridge 10 used in the camera 20 is the above-described known one shown in FIGS.

The camera 20 has a photographing lens 22 substantially at the center of the front of a camera body 21. The photographing lens 22 is interposed therebetween, and a film cartridge chamber 23 for loading the film cartridge 10 on one of the left and right sides, and a winding spool chamber on the other. 24. At the bottom of the film cartridge chamber 23, a film cartridge lid 27 for loading the film cartridge 10, holding the loaded film cartridge 10, and taking out the film cartridge 10 from the film cartridge chamber 23 is provided. A cartridge spool drive shaft 131 projects from the inner surface of the upper wall of the film cartridge chamber 23 toward the film cartridge lid 27. On the other hand, a hoisting spool 25 for winding up the film F is disposed in the hoisting spool chamber 24. On the upper surface of the camera body 21, a film feed dial 140 having a release button 145 and an operation knob 141 protruding outside is provided. The film feed dial 140 is manually operated, and its rotation is transmitted from the driving gear 142 to the cartridge spool driving mechanism 200 and the winding spool driving mechanism 300, and the cartridge spool driving shaft 131 and the winding spool 25 are rotated synchronously. Can be done. The film F sent out from the film cartridge 10 loaded in the film cartridge chamber 23 by the rotation of the film feed dial 140 passes through the film feed space 29 behind the aperture 28 (the back side of the camera 20), and is taken up by the winding spool. Room 2
4 and is wound up by the winding spool 25. In addition,
In FIG. 1, reference numeral 171 denotes a strobe, and 172 denotes an objective window of a finder. In FIG. 3, 151 is a cartridge lid lock lever, and 181 is an eyepiece window of a finder.

FIGS. 4 to 6 show details of the film feeding mechanism in the camera body 21. FIG. Although the camera body 21 is omitted in these figures, the film cartridge 10 is located at a position where the film cartridge 10 is loaded in the film cartridge chamber 23, and the winding spool 25 is
It is assumed that it is arranged at a predetermined position inside. A film feed dial 140, which is a driving source, has a disk-shaped operation knob 141 projecting from the camera body 21 to the outside, and is coaxially joined to a lower portion of the operation knob 141, and
Drive gear 1 for transmitting rotation to cartridge spool drive mechanism 200 and winding spool drive mechanism 300 inside
42, the operation knob 141 is manually fed (rewound) and rotated in the rewind direction to feed the film F.

First, the cartridge spool drive mechanism 200 for driving the cartridge spool drive shaft 131 will be described. First gear 201 meshing with driving gear 142
Is supported by a gear arm 204 rotatably supported by a shaft 142x of a driving gear 142 so as to be able to rotate around the shaft 201x and revolve around the shaft 142x. A planetary gear 203 coaxial with the first gear 201 is provided via a gear shaft 202 extending in the direction of the rotation axis 201x of the first gear 201. With the revolution of the first gear 201 with respect to the driving gear 142, the planetary gear 203
Selectively mesh with a predetermined portion of the gear surface 206 formed on the inner peripheral side of the gear.

A cartridge spool driving shaft 131 is provided on the side of the film cartridge chamber 23 of the cartridge spool driving gear 205.
And the axis is fixed. The cartridge spool drive shaft 131 has a substantially cylindrical base 133, and a coupling portion 135 having a smaller diameter than the base 133, which is formed integrally with one end of the base 133 so that its axis is aligned. The coupling portion 135 is engaged with the spool drive bearing hole 12a of the cartridge spool 12 so as to be insertable and detachable, and the distal end portion has a smaller diameter toward the distal end, and a top surface is formed at the distal end. The coupling portion 135 has a key portion 137 protruding from the outer peripheral surface. When the film cartridge 10 is loaded in the film cartridge chamber 23, the coupling portion 135 is fitted into the spool drive bearing hole 12a of the cartridge spool 12, and Further, the key portion 137 has the key groove 14.
Is engaged with the cartridge spool drive shaft 131.
Is transmitted to the cartridge spool 12.

Next, the winding spool drive mechanism 300 will be described. The first gear 301 is located at a position different from the first gear 201 on the outer periphery of the driving gear 142.
The first gear 301 and a second gear 303 below the camera body 21 are connected to a gear shaft 30 extending vertically in the vicinity of the film cartridge chamber 23.
2 are coaxially connected to the upper and lower ends. The large-diameter gears 305 and 307 are sequentially meshed with the second gear 303, and can revolve with respect to the large-diameter gear 307 by a gear arm 308 that is allowed to rotate by a predetermined width with respect to a shaft 307x of the large-diameter gear 307. A planet gear 309 is supported. A second planetary gear 311 is coaxially connected to the planetary gear 309 having the shaft 309x. The planetary gear 309 and the second planetary gear 311 are in a range where the rotation of the gear arm 308 is allowed when the rotation direction of the film feed dial 140 is changed from the feeding (winding) direction to the rewinding direction or vice versa. Make an orbit. When the second planetary gear 311 (and the planetary gear 309) is located at one end of this reciprocating rotation, the lower part of the hoisting spool 25
The second planetary gear 311 meshes with the hoisting spool drive gear 313 that rotates the fifth gear 5.

The film feeding mechanism of the camera 20 operates as follows. When the film feed dial 140 is rotated in the feeding direction (counterclockwise in FIG. 5) in a state where the film cartridge 10 is mounted in the film cartridge chamber 23, the cartridge spool driving shaft 131 is fed through the cartridge spool driving mechanism 200. Cartridge spool 12 (spool drive bearing hole 12a) that rotates in the direction (same clockwise) and engages with coupling portion 135.
Of the film cartridge 10 by the rotation of
The film F passes through the film feeding space 29 in the camera body 21 and advances toward the winding spool 25 (initial feeding of the film F). At this time, the hoisting spool 25 moves in the hoisting direction (FIG.
When the leading end of the film F is wound around the winding spool 25, the film F is pulled on the winding spool 25 by the winding speed of the winding spool 25 which is slightly higher than the feeding speed of the cartridge spool 12. And wound up by a predetermined amount. The reason why the rotation on the winding side is made faster than on the feeding side is to prevent the film F from becoming loose, and the cartridge spool driving mechanism 2
00 and the gear ratio setting of the hoisting spool drive mechanism 300, the cartridge spool 12 rotating by a common drive source
And the rotation speed of the winding spool 25 can be changed. Even if the second planetary gear 311 and the hoisting spool drive gear 313 are separated at the beginning of winding, the planetary gear 309 and the second planetary gear 311 are rotated by the rotation of the film feed dial 140 in the feeding (winding) direction. In order to revolve in the direction of the hoisting spool drive gear 313 and mesh therewith, the hoisting spool 25 starts rotating in the hoisting direction.

On the other hand, when rewinding the film F, the film feed dial 140 is rotated in the rewinding direction (clockwise in FIG. 6). Since the rotation direction of the large-diameter gear 307 changes, the planetary gear 309 and the second planetary gear 311 revolve counterclockwise as shown in FIG.
1 is disengaged from the hoisting spool drive gear 313, and they are separated from each other. Since power is not transmitted to the hoist spool drive gear 313, the hoist spool 25 is free and the film F is rewound by the cartridge spool 12
Is performed only by rotation in the rewind direction. Accordingly, the cartridge spool 12 of the film cartridge 10 is a spool for feeding and rewinding, and
Reference numeral 5 denotes a spool exclusively used for winding.

The spool parking device according to the present invention applied to the camera 20 having the above-described configuration includes a cartridge spool driving gear 205 which is a final gear connected to the cartridge spool driving shaft 131, and an outer peripheral surface of the cartridge spool driving gear 205. Rotation in the plane direction (oscillation)
The spool parking lever 50 that performs movement to lock the rotation (drive) of the cartridge spool drive gear 205
And a rewind lever 60 for restricting or releasing the rotation of the spool parking lever 50, a sprocket 70 which engages with a perforation P provided on the film F, and rotates by feeding the film F, and a frame number of the film F. The sprocket 70 is rotated so that
And a film number plate 80 for locking the rotation of the spool parking lever 50 in a predetermined state, similarly to the rewind lever 60.

The details of the spool parking device will be described with reference to FIGS. Note that the rotation direction and movement direction of the members described below will be described in a state viewed from the upper surface side of the camera 20 (FIGS. 9 to 14).

The cartridge spool drive gear 205 for rotating the cartridge spool 12 via the cartridge spool drive shaft 131 has a gear surface 20 on its inner peripheral surface.
6, the outer peripheral surface 207 of which has a smooth cylindrical surface shape. This gear outer peripheral surface 207
An engagement recess 209 is formed at a predetermined upper portion toward the gear surface 206.

The spool parking lever 50 has a spool driving gear locking lever 53 and a rotation restricting lever 55 extending in the forward and reverse directions from the lever shaft 51.
The spool driving gear locking lever 53 includes a base 53a and a lever 53b extending from the end of the base 53a so as to be substantially parallel to the base 53a with a step. The first engagement portion 54 is bent in the planar direction.
Are formed. On the other hand, the rotation restricting lever 55 has a rotation permitting concave portion 56 formed on one side surface 55s by a restricting portion 55b bent a plurality of times in the plane direction near the tip of the lever portion 55a. The rotation allowing recess 56 includes a bottom surface 56a substantially parallel to the side surface 55s, and a bottom surface 56a.
Is provided with an inclined surface 56b extending from the end of the rotation regulating lever 55 toward the distal end. A short extension 55c extends substantially parallel to the lever 55a from the regulation portion 55b to the foremost end, and a rotation regulation surface 58 is provided on the extension of the side surface 55s. The end of the extension 55c is
A second engaging portion 59 that rises substantially vertically from the projection is provided.

The lever shaft 51 is provided with a bearing hole 51a. The spool parking lever 50 moves the spool driving gear locking lever 53 to the film cartridge chamber 23.
(Film cartridge 10) side, rotation control lever 5
5 toward the winding spool chamber 24 (winding spool 25), the rotation shaft 121 installed in the camera body 21 substantially in parallel with the axis of the cartridge spool drive shaft 131,
The bearing hole 51a is rotatably fitted and supported. This allows the spool parking lever 50 to rotate (swing) in a planar direction about the bearing hole 51a, and the rotation causes the leading end of the first engagement portion 54 to move to the gear outer peripheral surface 207 (engagement). It is at a position where it can be disengaged from the recess 209). The rotation restricting lever 55 is connected to a tension spring 111 for pulling the rear side of the camera 20, and the spool parking lever 50 is urged in a counterclockwise direction (FIGS. 9 to 14). That is, the first engagement portion 54 and the gear outer peripheral surface 207
(Engagement concave portion 209) is urged in a direction in which it contacts (or engages).

The rewind lever 60 includes a substantially rectangular plate 63 and an operation unit 67 fixed to one side surface of the plate 63 in the longitudinal direction. The operation part 6 is provided on the plate-shaped part 63.
A slide groove 64 is formed in the vicinity of the connection surface with the plate 7 in the longitudinal direction of the plate portion 63. In the slide groove 64,
A pair of slide support shafts 68 and 69 installed in the camera body 21 are inserted substantially parallel to the rotation shaft 121, and the rewind lever 60 is positioned at a position A where the slide support shaft 68 contacts the slide end 64a. (In the figure) and the slide support shaft 69 are slidably supported between a position B (in the figure) where the slide support shaft 69 contacts the slide end 64b. In the present embodiment, the position of the rewind lever 60 when it is at A is called a "spool free position", and the position of B is called a "parking position". The operation unit 67 projects out of the camera body 21 on the back side of the camera 20 (FIG. 3), and can be manually slid from the outside. From a predetermined position on the surface of the plate portion 63, a substantially cylindrical lever rotation restricting protrusion 65 is implanted toward the upper surface of the camera 20.

In this installation state, the positional relationship between the spool parking lever 50 and the rewind lever 60 in the sliding direction is such that when the rewind lever 60 is at the spool free position, the cylindrical surface of the lever rotation restricting projection 65 restricts the rotation. It is arranged such that the cylindrical surface of the lever rotation restricting projection 65 is in the vicinity of the bottom surface 56a of the rotation allowing recess 56 when in contact with the surface 58 and at the parking position.

The sprocket 70 has a substantially disk-shaped rotating portion 7.
1 and 4 projecting radially from the circumferential surface of the rotating portion 71
The sprocket shaft 73 includes a pair of engaging teeth 72, a substantially cylindrical sprocket shaft 73 that extends from the rotating portion 71 so as to coincide with the axis thereof, and rotation transmitting teeth 74 that are further implanted in the axial direction from the tip of the sprocket shaft 73. You. Rotation transmission tooth 74
Is provided with two concave portions 75 formed axially symmetrically on the outer wall surface. Sprocket 70 in camera body 21
The rotation transmission teeth 74 are installed at positions where the engagement teeth 72 can engage with the perforations P of the film F from the front side of the camera 20 with the rotation transmission teeth 74 facing the upper surface side of the camera 20.

The film number plate 80 is constituted by a rotating disk 81 having a gear 83, and a bearing hole 81 is provided at the center of rotation.
a. On one surface side of the rotating disk 81, there is provided a rotation restricting rib 85 which is annularly formed concentrically with the circumference of the rotating disk 81. The rotation restricting rib 85 has a certain thickness and separates the inner peripheral wall 86 side and the outer peripheral wall side of the rotation restricting rib 85, but is penetrated at only one location to communicate the inner peripheral wall 86 side and the outer peripheral side. A portion 87 is formed.

The film number plate 80 includes a rotation restricting rib 85.
The camera body 21 is oriented substantially in parallel with the axial direction of the sprocket shaft 73 with the surface having
Is rotatably supported about a bearing hole 81a by a rotating shaft 123 disposed therein. Here, the rotation transmitting teeth 7
Since the film number plate 80 is installed so that the gear 4 engages with the gear 83, when the film F is fed in the forward and reverse directions, the sprocket 70 engaged with the perforation P rotates in the forward and reverse directions. The film number plate 80 also rotates.
Perforation P: One set (two) per shot
Since the sprocket 70 is provided with four engaging teeth 72 to be engaged with the sprocket 70, when the film F is fed (feeded or rewound) by one frame, the sprocket 70 is reduced to half. Rotate. Since the rotation transmitting tooth 74 has the two concave portions 75 as described above, a half rotation of the sprocket 70 is a rotation corresponding to one concave portion 75 of the rotation transmitting tooth 74. Accordingly, for feeding one frame of the film F, the film plate 80 rotates by one tooth of the gear 83 meshing with the concave portion 75 of the rotation transmitting tooth 74. The rotation phase of the film number plate 80 is set such that the communication portion 87 of the rotation restricting rib 85 faces the rear side of the camera 20 when the number of images to be photographed is “0” (initial position). In addition, when the film number plate 80 is installed, the second engagement portion 5 of the spool parking lever 50 is simultaneously operated.
9 comes into contact with a predetermined position near the rotation restricting rib 85 from the bottom side of the camera 20.

The spool parking device having the above configuration operates as follows. This will be described with reference to FIGS. 9 to 14 as viewed from the top side of the camera 20. 9 to 11 show the spool parking lever 50, the rewind lever 60, and the cartridge spool drive gear 205.
It shows only the interlocking relationship of
The operations shown in FIGS. 12 to 14 are performed in addition to the operation of 0 and the film number plate 80. Therefore, FIGS. 9 and 12, FIG.
0 and FIG. 13 and FIGS. 11 and 14 coincide with each other.

At the time of photographing, when the film feed dial 140 is rotated in the feeding (winding) direction each time the photographing for one frame is completed, the film F is fed from the film cartridge 10 to the film feeding space 29 for one frame. And wound up on the winding spool 25. As described above, the sprocket 7 is moved according to the feeding of one frame of the film F.
0 rotates by one half, and the film plate 80 rotates by one gear 83 by the half rotation of the sprocket 70.
Therefore, when taking X frames, the film number plate 80
Rotates by X teeth. Here, the film F is sent out from the film cartridge 10 on the left hand side in the figure, and is wound up on the winding spool 25 in the right hand direction. Accordingly, the sprocket 70 engaging with the perforation P of the film F rotates clockwise, and the film plate 80 rotates counterclockwise. During this time, the spool parking lever 50 is urged in the counterclockwise direction by the tension spring 111, but the second engagement portion 59 is regulated by the inner peripheral wall 86 provided on the rotation regulating rib 85, and is in the spool free position. Since the lever rotation restriction protrusion 65 of the rewind lever 60 restricts the rotation restriction surface 58, the spool parking lever 5
Reference numeral 0 denotes a state in which the rotation is locked (FIGS. 9 and 12).

When the rewind lever 60 is slid to the parking position after the photographing of the predetermined number of frames X is completed, the contact position of the lever rotation restricting projection 65 with respect to the spool parking lever 50 moves away from the rotation restricting surface 58 and turns. The transition is made in the direction of the movement-permitted recess 56. This is the rewind lever 60
With regard to, the rotation restriction of the spool parking lever 50 in the counterclockwise direction is released, but since the inner peripheral wall 86 of the rotation restriction rib 85 still holds the second engagement portion 59, the rotation of the spool parking lever 50 is stopped. do not do.

Subsequently, when the film feed dial 140 is rotated in the rewinding direction (clockwise), the cartridge spool 12 is rewinded (counterclockwise) through the cartridge spool driving mechanism 200 including the cartridge spool driving gear 205. And the film F is stored in the film cartridge 10. Similarly to the feeding (winding), when the film F for one frame is rewound, the film number plate 80 rotates counterclockwise (clockwise) with respect to the feeding (winding) by one gear 83 via the sprocket 70. . When the number of shots is X, the number of shots becomes “0” when the film number plate 80 is rotated in the rewind direction (clockwise) by the gear 83X teeth. The fact that the number of shots is “0” means that the rotation restricting rib 8
5 is a state in which the communication portion 87 has returned to the initial position facing the back side of the camera 20. In this state, since the second engaging portion 59 of the spool parking lever 50 has a phase relationship in which the inner peripheral wall 86 of the rotation restricting rib 85 is not restricted, the spool parking lever 50 is allowed to rotate counterclockwise.
Therefore, when the number of films F becomes “0”, the spool parking lever 50 rotates counterclockwise about the bearing hole 51 a by the urging force of the tension spring 111. The rotation of the spool parking lever 50 is locked when the end surface of the first engagement portion 54 comes into contact with the outer peripheral surface 207 of the cartridge spool drive gear 205. At this time, since there is a space between the bottom surface 56a of the rotation permitting recess 56 and the lever rotation restricting protrusion 65, the rotation of the spool parking lever 50 is not restricted by the rewind lever 60, and the spool parking lever 50 Have room to rotate in the counterclockwise direction (FIGS. 10 and 13).

In the above stage, the end of the first engagement portion 54 is connected to the outer peripheral surface 2 of the cartridge spool drive gear 205.
However, since the cartridge spool drive gear 205 is rotatable, the photographer continues to rotate the film feed dial 140 in the rewind direction.
When the number of the films F is "0", the film F is wound up toward the film cartridge chamber 23 and is not in the film feeding space 29, so that the perforations P of the film F and the engaging teeth 72 of the sprocket 70 are engaged. Has nothing to do,
Only the cartridge spool drive gear 205 (cartridge spool drive shaft 131) rotates. As a result, the film F is further rewound, so that the film F can be reliably stored. Then, the engagement recess 209 of the cartridge spool drive gear 205 is
When the rotation position reaches a position where the gear can be engaged with the gear, the regulation of the gear outer peripheral surface 207 is released, and the spool parking lever 50 further rotates counterclockwise from the above position by the urging force of the tension spring 111, and The engagement recess 209 is engaged. As a result, the rotation of the cartridge spool drive gear 205 is locked, and the cartridge spool 12 cannot be rotated by operating the film feed dial 140, and spool parking is completed. At the same time as the completion of spool parking, the film feed dial 140
Is stopped, the operator can sense that the winding of the film F has been completed. At this time, the exposure state indicator 16 of the film cartridge 10 indicates that exposure has been completed. (FIGS. 11 and 14).

The rotational position relationship between the key groove 14 formed on the inner wall surface of the spool drive bearing hole 12a of the cartridge spool 12 and the rotation display plate 12b of the exposure state display 16 is determined. Therefore, by regulating the stop positions of the cartridge spool drive shaft 131 and the cartridge spool drive gear 205, it is possible to arbitrarily adjust the display of the exposure state indicator 16. In this embodiment,
The engagement recess 2 of the cartridge spool drive gear 205 is set so that the spool parking is completed at a rotation phase corresponding to the display hole 16a indicating "exposed" on the rotation display plate 12b.
09, the first engagement portion 5 of the spool parking lever 50
4 is set.

After the spool parking is completed, when the cartridge lid lock lever 151 is opened to release the lock of the film cartridge lid 27, the light shielding door operating shaft 17a is operated in the closing direction via the light shielding door opening / closing mechanism interlocked therewith. The light shielding door 17 is closed. Subsequently, the unlocked film cartridge lid 27 is opened, and the film cartridge 10 is taken out of the film cartridge chamber 23. Once the spool parking is completed, there is no possibility that the film F will be sent out carelessly before the light blocking door 17 is closed. The light blocking door opening / closing mechanism is not related to the gist of the present invention, and thus the description is omitted.

When the film cartridge 10 is taken out, the spool parking state is maintained. When replacing the film cartridge 10 with a new one, the film cartridge 10 is loaded into the film cartridge chamber 23, and then the rewind lever 60 is slid from the parking position to the spool free position. Since the rewind lever 60, which is guided by the slide support shafts 68 and 69, does not move in the front-rear direction of the camera 20, the lever rotation restricting protrusion 65 is moved to the inclined surface 5
6b, and slide while pushing the rotation restricting lever 55 downward (in front of the camera 20) in FIG. As a result, the spool parking lever 50 is rotated clockwise (FIGS. 9 to 14) against the urging force of the tension spring 111, and the first engagement portion 54 and the engagement concave portion 209 are rotated.
Is disengaged. When the engagement between the first engagement portion 54 and the engagement concave camera 209 is released, the cartridge spool drive gear 205 and the cartridge spool 12 become rotatable. When the rewind lever 60 is at the spool free position, the lever rotation restricting protrusion 65 restricts the rotation restricting surface 58, so that the spool parking lever 50 cannot rotate counterclockwise and the spool free state is maintained (FIG. 9) When the number display of the film F is "0", the rotation restricting rib 85 of the film number plate 80 does not restrict the rotation of the spool parking lever 50, so that only the rewind lever 60 rotates the spool parking lever 50. Is regulated. Subsequently, when the film feed dial 140 is operated to feed the film F in the feeding (winding) direction and advance by one or more frames, the inner peripheral wall 8 of the rotation restricting rib 85 is moved.
12 restricts the second engagement portion 59 of the spool parking lever 50 as shown in FIG. 12, and the above procedure is repeated again.

Although the present invention has been described based on the illustrated embodiments, the present invention is not limited thereto. For example, the number of gears of the sprocket and the film number plate can be made to correspond to the form of perforation provided on the film and the number of films. Furthermore, it is also possible to perform rotation locking with a desired gear in the cartridge spool drive gear train other than the cartridge spool drive gear.

[0039]

As is apparent from the above description, according to the present invention, the spool of the self-propelled film cartridge camera can stop the rotation of the spool provided in the cartridge only when the film is rewound. The parking device can be obtained with a mechanically simple structure.

[Brief description of the drawings]

FIG. 1 is a front view showing an arrangement state of a film feeding mechanism in a lens shutter type camera to which a spool parking device according to the present invention is applied.

FIG. 2 is a plan view of the lens shutter camera.

FIG. 3 is a perspective view showing the lens shutter type camera as viewed from below.

FIG. 4 is a front view showing a drive gear train of a film feeding mechanism in the lens shutter type camera shown in FIGS. 1 to 3;

5 is a plan view showing a driving direction at the time of feeding (winding) of the drive gear train of FIG. 5;

FIG. 6 is a plan view showing a driving direction when the drive gear train of FIG. 5 is rewound.

FIG. 7 is a perspective view showing an entire film feeding mechanism to which the spool parking device of the present invention is applied.

FIG. 8 is an exploded perspective view showing constituent members of the spool parking device.

FIG. 9 is a plan view showing an interlocking relationship among a cartridge spool driving gear, a spool parking lever, and a rewind lever during photographing in one embodiment of the present invention.

10 is a plan view showing a state in which the film is rewound from the state of FIG. 9 and the number display is zero.

FIG. 11 is a plan view showing a state in which the first engagement portion of the spool parking lever and the engagement concave portion of the cartridge spool drive gear have been engaged from the state of FIG. 10 to complete spool parking.

12 is a plan view showing a state of a main part of the spool parking device of the present invention during photographing by adding a sprocket and a film number plate to the configuration of FIG. 9;

13 is a plan view showing a state in which the film is rewound from the state of FIG. 12 and the number display is zero.

FIG. 14 is a plan view showing a state where spool parking has been completed from the state of FIG. 13;

FIG. 15 is a perspective view showing an external appearance of an example of a film cartridge applied to the present invention.

FIG. 16 is a perspective view showing the fill cartridge of FIG. 15 viewed from an upside down position.

[Explanation of symbols]

 F Film P Perforation 10 Film cartridge 12 Cartridge spool 12a Spool drive bearing hole 14 Keyway 17 Light shielding door 20 Camera 21 Camera body 23 Film cartridge chamber 24 Winding spool chamber 25 Winding spool 50 Spool parking lever 53 Spool driving gear locking lever 54 first engaging portion 55 rotation restricting lever 56 rotation permitting recess 58 rotation restricting surface 59 second engaging portion 60 rewind lever 64 slide groove 65 lever rotation restricting projection 67 operating portion 70 sprocket 72 engaging teeth 74 rotation Transmission tooth 80 Film number plate 81 Rotating disk 83 Gear 85 Rotation restricting rib 86 Inner peripheral wall 87 Communication part 131 Cartridge spool drive shaft 140 Film feed dial 142 Driving gear 200 Cartridge spur Le drive mechanism 205 cartridge spool drive gear 207 gear outer peripheral surface 209 engaging recesses 300 hoisting spool driving mechanism 313 hoisting spool drive gear

Claims (5)

[Claims] 1. A camera using a self-propelled film cartridge for rotating a spool around which a film is wound and feeding the film from a cartridge, a spool driving means for rotating a spool of the film cartridge, and the spool driving means. A spool driving / locking means movable between a position for locking the rotation of the film and a position allowing the rotation; a film number detecting means for detecting an amount of film fed from the film cartridge; A self-propelled film cartridge camera comprising: a spool parking means for moving the spool drive locking means to a locking position to lock the spool driving means when the feeding amount is zero. Spool parking device. 2. The spool driving means according to claim 1, wherein said spool driving means has an internal gear formed coaxially and integrally with the spool driving shaft, and said internal gear is provided on said outer peripheral surface with said spool driving locking means. A spool parking device for a self-propelled film cartridge camera, comprising an engaging recess engaged and disengaged from the spool parking device. 3. The film number detecting means according to claim 1, wherein the film number detecting means engages with a perforation provided on the film, and rotates by a predetermined number of teeth for each photographing frame as the film is fed and rewound. A sprocket; and a substantially disc-shaped film number plate for receiving a rotation of the sprocket and rotating by a predetermined amount for each photographing frame; and the spool parking means comprises: A substantially annular rib, which is provided substantially coaxially and restricts movement of the spool drive locking means to the locking position by the inner peripheral wall; and releases the restriction on the inner peripheral wall when the film feeding amount is zero. A communication hole provided in the rib with a phase in a rotational direction allowing movement of the spool drive locking means to the locking position;
A self-propelled film cartridge camera spool parking device. 4. The rewinding device according to claim 2, wherein when the film is unwound, the film feed amount becomes zero and the spool drive locking means comes into contact with the outer peripheral surface of the internal gear. A spool parking device for a self-propelled film cartridge camera, wherein the self-propelled film cartridge camera engages with the engagement recess of the internal gear by rotating the spool drive locking means in the direction. 5. The self-propelled film cartridge camera spool parking device according to claim 1, further comprising parking releasing means for releasing the rotation locked state of said spool driving means by an external operation.