JPH0296734A - Camera - Google Patents

Abstract

PURPOSE:To secure lading and to reduce costs by providing a guide part supporting both ends of film in the width direction on the inner surface of the back lid of a cartridge housing chamber. CONSTITUTION:A main body 13 is provided with upper and lower recessed parts 13b corresponding to outer rails 11a. When the end of the outer rail 11a abuts on the bottom of the recessed part 13b, the inner rail 13a of the main body 13, the outer rail 11a of the back lid 11 and a plane 11c enclosed with two outer rails 11a secure the tunnel amount that the film 13 passes. Instead of the main body 13, the two outer rails 11a provided on the back lid 11 regulates the position of the film 1a in the width direction. Thus, since no pressure plate for pressing and energizing the film against the back lid of the camera is needed any more, costs can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera, and more particularly to a camera equipped with a simple loading mechanism for loading and unloading a film cartridge.

[Prior art and its problems]

Conventionally, when it comes to loading film, a so-called auto-loading mechanism that uses a motor to feed the film has been widely used as an improvement over the method of inserting the leading end of the film into the slit of the spool and then winding it around the spool. There is. With this, loading is completed automatically by simply loading the film cartridge into the cartridge chamber of the camera, pulling out a predetermined length of film from the film cartridge, and closing the back cover.
The reality is that even with this method, some people still cannot load film into their cameras. Unlike audio and video cassette tapes, film cartridges have a so-called league part that protrudes from the leading edge of the film, making users feel uneasy about handling them. To increase the probability of success, we recommend things like ``Align the leading edge of the film with the mark,'' ``If the film is long, rewind it a little,'' and ``Close the back cover so that the film does not lift up.'' Too many precautions (possibly caused by confusion for users).

On the other hand, there are also cameras that use a so-called drop-in loading method, which allows film to be loaded like a cassette. For example, the film cartridge is dropped into the cartridge chamber through an opening formed on the bottom of the camera, but in this case, if the league portion of the film is longer than a predetermined length, loading may be hindered.

As a countermeasure to this problem, it has been proposed to install a cutter device inside the camera and use this to cut off the excessively long part of the leading edge of the film, but in this case, the cut film pieces remain inside the camera. There is also the problem that the chips have a negative effect on the internal mechanisms of the camera.

Furthermore, if you open the lid provided on a part of the back lid that corresponds to the cartridge chamber, load the film cartridge from here, and close the lid with the league part of the film exposed outside the camera, loading will occur automatically. Such a camera has also been proposed in Japanese Patent Laid-Open No. 62-215256 by the present applicant.

However, in this proposal, when the film passes through the aperture part in the camera, the pressure plate for pressing and urging the film is pushed up due to the influence of film curling, etc. It had the disadvantage that it would come off and tilt, causing loading failures. Another disadvantage is that the cost is high because a complicated mechanism is used to shield the path for rewinding the film into the camera.

[Means for solving problems]

The present invention solves the above-mentioned drawbacks of the conventional example, and includes a storage section for storing a film cartridge, a cartridge storage chamber that can protrude to the outside of the camera, and a film cartridge that can be loaded into the protruded cartridge storage chamber. In a camera configured such that when the cartridge storage chamber is then stored in the camera, the film pulled out from the film cartridge is automatically wound across the aperture in the camera, and the cartridge storage chamber is stored in the camera. A part of the back of the camera is left open, and the other part is covered with a rear cover, which is integrally fixed to the camera body and has two guide parts on its inner surface that support both ends of the film in the width direction. The camera is characterized in that the two guide portions are fitted into the two guide portions provided on the outside of the two inner rails provided on the camera body side.

Furthermore, in the middle of the film path between the cartridge storage chamber and the camera body side, there is a light shielding member that is longer than the width of the film and serves to block light from the path after empty rewinding is completed, and a light shielding member that is pressed against the film winding drive means side. and a suppressing member to force the
The light shielding member and the suppressing member are integrally formed.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a schematic perspective view of the camera of the present invention, Figures 2 and 3 are
This figure is an exploded perspective view showing the main components of the camera of FIG. 1. In these figures, 1 is a film cartridge, Ia is a film, 2 is a camera, and 3 is a cartridge storage chamber, and the cartridge storage chamber 3 is formed with an opening 3a into which a film cartridge I can be inserted from above. There is. Reference numeral 3b denotes a rear portion integrally provided in the cartridge storage chamber 3, and 3C denotes a recess formed inside the rear portion 3b. It is fulfilling its role. A bottom portion 3d having an extended portion is formed on the lower side of the cartridge storage chamber 3, and a claw portion 3e is formed in the vertical direction at the tip of the bottom portion 3d, and the claw portion 3e is latched to a storage stand 8, which will be described later. It is now possible to do so. 3f is a recess for attaching a film detection prism 34 to be described later; 3g is a shaft hole into which a rotating shaft 9 is fitted;
3h is a light/dark pattern for position determination. Reference numeral 4 denotes a roller unit that is attached to the inner side of the back surface 3b of the cartridge storage chamber 3 near the recess 3r by heat caulking or the like, and the roller unit 4 serves as a light shielding roller 4.
a, and pressure contact parts 4b and 4c for pressing the film 1a against a sprocket 4 which will be described later, and the surface pressure contact part 4
The teeth 41a of the sprocket 41 and the teeth 41b of the sprocket 41 enter below the pressure contact portion 4C between the teeth b and 4c.

Furthermore, sloped portions 4d and 4e are formed on the upper portions of the pressure contact portions 4b and 4c so that the film la can easily enter from above.

5 is an idle gear train for rewinding; 6 is a fork gear for rotating the fork 7; the shaft portion of the fork gear 6 is fitted into a hole (not shown) in the lower surface of the cartridge storage chamber 3; . Further, a fork spring 36 is stretched between the fork 7 and the fork gear 6, and the fork spring 36 always urges the fork 7 upward. Said idle gear train5. The fork gears 6 are both fitted into shafts (not shown) at the bottom 3d of the cartridge storage chamber 3, and their positions in the thrust direction are regulated together with the fork 7 by a presser plate 37. 8, a pair of holes 8a are formed at one end of the storage stand 8;
By inserting the shaft 9 into the shaft hole 3g and the hole 8a, the storage stand 8 is rotatably attached to the lower part of the cartridge storage chamber 3. The storage table 8 also includes a rack portion 8b that engages with a winding gear (described later), a long guide hole 8c that engages with a guide bin 33a provided on the base plate 33 (described later), and provides guidance during sliding. A groove 8d is formed. Further, the claw 3e of the cartridge storage chamber 3 is adapted to engage with the tip end 8e of the storage stand 8. Reference numeral 10 designates a torsion spring that causes the cartridge storage chamber 3 to protrude by a predetermined length determined by the guide bin 33a, the guide hole 8C, and the guide groove 8d, and the claw 3e disengages from the tip 8e of the storage stand 8. At times, it serves to tilt the cartridge storage chamber 3 at a predetermined angle about the axis 9. This is because if an attempt is made to completely expose the opening 3a of the cartridge storage chamber 3, the amount of sliding becomes too large and the operation becomes unstable, so the amount of sliding is reduced by tilting the cartridge storage chamber 3. It is. Reference numeral 11 denotes a rear cover, which is integrated with the main body 13 by tightening screws or the like. The rear M11 has outer rails lla, which are two parallel protrusions extending in the film feeding direction, on its inner side, and the rear lid roller 12, which rotatably supports the roller 12a, is attached to the roller attachment part 11b. It is being

Further, the roller 4a of the roller unit 4 is pressed into contact with the outer recessed portion 11d (see FIG. 8, which will be described later), so as to function as a light shield.

As shown in FIG. 12, which will be described later, the main body 13 is provided with an inner rail 13a similar to the conventional one, but an outer rail unlike the conventional one is not formed, and a recess 13b corresponding to the outer rail 11a is formed. Located above and below.

When the end surface of the outer rail lla comes into contact with the bottom surface of the recess 13b, the inner rail 13a of the main body 13 and the rear lid 11
The outer rail lla and the plane llc sandwiched between the two outer rails lea ensure a tunnel amount through which the film la can pass, and the position of the film la in the width direction is controlled not by the main body 13 but by the rear cover. The two outer rails lla provided at 11 provide a structure that eliminates the conventional pressure plate and pressure plate spring.

An opening 13c is formed in the side surface of the main body 13, and this opening is used for the photointerrupter 43 to read the light and dark pattern 3h of the cartridge storage chamber 3. Further, the main body 13 is formed with a battery storage section 13d having a bottom surface that follows the outer shape of the battery 46 so that the battery 46 is stored therein. 14 is a main body roller, which includes a roller 14a and a support plate 14b.
-, the main body roller 14 is rotatably attached to a spool chamber (not shown) of the main body 13, is pressed against the spool 15 by the biasing force of a spring (not shown), and is wound around the spool 15 together with the rear cover roller 12. The film la is pressed down.

Reference numeral 16 denotes a fixing base for the spool 15, which is fixed to the top surface of the main body 13 with screws, etc., and the outer periphery of the shaft portion 16a is the spool]
It fits into the inner circumferential surface 15a of No.5.

17 is a fall prevention plate for preventing the tip of the film la from falling into the aperture (not shown);
Reference numeral 18 indicates a rotation shaft thereof, and reference numeral 19 indicates a drive lever for the fall prevention plate 17. The drive lever 19 has a two-sided shape, and one shaft 19a is connected to the drop prevention plate 17, so that the rotational force about the other pongee 19b of the drive lever 19 is directly transmitted to the drop prevention plate 17. It has become so. Further, the drive lever 19 has a lever portion 19c, and a cylindrical portion 19d is provided at the tip thereof. Reference numeral 20 denotes a film detection member, and when this film detection portion 20a is pushed by the film Ia, the film detection member 20 rotates around the shaft hole 20b, and the cylindrical portion 19d of the drive lever 19 inserted into the opening 20c of the film detection member 20 rotates. is rotated around axis 19b. Due to this rotation, the fall prevention plate 17 also rotates in a similar manner. 21 is a motor built into the spool 15, and a pinion 22 is fixed to its output shaft 21a.
The rotation of the pinion 22 is transmitted to a gear 24 via a gear train 23. The gear 24 includes a large gear 24a, a small gear 24b, and a fitting portion 24c between both gears 24a and 24b (Fig. 11).
The fitting part 24c fits into the hole 25a of the gear 25, and the small gear 24b connects to the three gears 26 that rotate around three shafts 25b installed at equal 120° divisions of the gear 25. They mesh together. Further, the gear 25 has a ratchet portion 25c on its outer periphery. The three gears 26 mesh with internal teeth 27b of a gear 27 having a ratchet portion 27a, and external teeth 27c are formed on the outer periphery of the gear 27.

As described above, the gears 24, 25. 26. 27 forms a planetary gear mechanism, and when the driving force is transmitted to the large gear 24a of the gear 24, the ratchet part 25c of the gear 25
The output form differs depending on which of the ratchet portions 27a of the gear 27 is engaged. That is,
When the former is locked, an output is obtained from the external teeth 27c of the gear 27, and when the latter is locked, an output is obtained from the gear 25 due to the revolution of the three gears 26. The output from gear 25 is output from idle gear 38. One-way clutch gear 39° is transmitted to sprocket rotating shaft 40. Then, a distal end portion 40a of the sprocket rotating shaft 40, which has an oval-shaped cross section and is prevented from rotating, fits into the sprocket 41, so that the two rotate as one. The one-way clutch gear 39 and the sprocket rotating wheel 40 constitute a one-way clutch that rotates together in the film winding direction, but is free in the film rewinding direction. Also gear 2
The output from 5 is also transmitted to the idle gear 42, and is transmitted to the fork gear 6 via the rewinding idle gear train 5 on the cartridge storage chamber 3 to rotate the fork 7.

Furthermore, the signal is transmitted to the spool 15 from the middle of the gear train 23 via idle gears 44 and 45 to a gear portion 1.5c formed at the lower end of the spool 5. At this time, the gear ratio is made smaller than that of the sprocket transmission system so that the rotational speed becomes faster. On the other hand, the output of the gear 27 is transmitted to the rack portion 8b of the storage stand 8, and causes the storage stand 8 to slide back and forth.

28 is a locking lever that locks either the ratchet portion 25c of the gear 25 or the ratchet portion 27a of the gear 27; the upper claw 28a locks the ratchet portion 25c, and the lower claw 2
8b each locks the ratchet portion 27a, and has a lever portion 28d in which a recess 28e is formed, and the lever portion 2
8d has a downwardly directed convex portion 28f at the tip thereof, and the shaft hole 28
It is pivotally mounted to rotate around the center and is urged to rotate clockwise in FIG. 5 by a spring 30. A detection lever 29 detects the storage state of the cartridge storage chamber 3 with a detection portion 29a, and is biased by a spring 31 to rotate clockwise in FIG. 5 about the shaft hole 29b. Also, due to this biasing force, the other end 29c is in contact with the lever part 28d of the locking lever 28 when the cartridge storage chamber 3 is not in the storage position, and is engaged by the recess 28e when it is in the storage position. It is in a stopped state. Reference numeral 32 designates a base plate cover for holding down the aforementioned gear and lever, and a hole 32a fits into the outer periphery 15b of the spool 15. Reference numeral 33 denotes a base plate, which includes the aforementioned gear and lever shafts, the guide bin 33a of the storage stand 8, a convex portion 33b for releasing the engagement between the claw 3e of the cartridge storage chamber 3 and the tip end 8e of the storage stand 8, etc. have.

FIG. 4 is a perspective view showing the camera of the present invention in different operating states when viewed from the rear, and FIG.
Figure (b) shows a state in which the cartridge storage chamber 3 is protruded outside the camera and a film cartridge can be loaded, and Figure (c) shows a state in which the film cartridge is inserted into the opening 3a.
After loading, store the cartridge storage chamber 3 and place the film la.
The end of the frame protrudes out of the camera, indicating that empty rewinding is about to begin.

FIG. 5 shows the storage stand 8 and gear 24 for moving the cartridge storage chamber 3. 25 is a plan view showing a clutch switching state with a planetary gear mechanism consisting of 25 and 26; FIG. That is, the claw 28b of the locking lever 28 engages with the ratchet portion 27'a of the gear 27 and prevents the gear 27 from rotating, so the three gears 26 revolve and the gear 25 is rotated. FIG. 2B shows a state in which the cartridge storage chamber 3 is projected to the outside of the camera, and the planetary gear mechanism is in a driving state of the storage base 8. That is, this time the claw 28a of the locking lever 28
engages with the ratchet portion 25c of the gear 25 and prevents rotation of the gear 25, so the driving force of the motor 21 is transferred to the ratchet portion 25c of the gear 25.
7.

FIG. 6 is a side view showing the relationship between the cartridge storage chamber 3 and the storage stand 8. FIG. 6(a) shows the stored state of the cartridge storage chamber 3, and FIG. The same figure (C) shows the state in which the and the camera are moved together to the rear side of the camera.
moves further leftward from the state shown in figure (b) and reaches base plate 3.
The claw 3e is pushed to the right by the convex portion 33b of No. 3, so that it is released from the distal end 8e of the storage stand 8, and is tilted by the angle α by the torsion spring 10 (Fig. 2). ing.

Fig. 7 is a sectional view showing the film leading edge and perforation detection mechanism, and Fig. 7 (a) shows the state at the start of idle rewinding when the cartridge storage chamber 3 is stored and the end of the film 1a protrudes outside the camera. , Figure (b) shows a state in which the leading edge of the film la is out of the optical path of the film detection mechanism during idle rewinding, and Figure <c> shows a state in which the leading edge of the film la is removed from the optical path of the film detection mechanism, and the motor is activated after a certain period of time has elapsed after the leading edge of the film la is detected. 21 is stopped, that is, a state in which idle winding is about to start; FIG. Here, the reason why the prisms 34 and 35 are arranged on both sides of the passage of film]a is to reduce the size of the prism 34 attached to the cartridge storage chamber 3, which is a movable part, and to downsize the cartridge storage chamber 3. This is also to prevent electrically mounted components from being placed in the cartridge storage chamber 3.

FIG. 8 is an enlarged view of the main part of the film detection mechanism shown in FIG. 7, and FIGS. 8(a) and 8(b) show the opening 53a of the mask 53 from the infrared light emitting diode 51 during idle rewinding.
The infrared light that has passed through passes through the perforations of the film 1a and enters the prism 35. 34, the phototransistor 52 receives the light and generates a light signal.
The infrared light is blocked by the film 1a and the phototransistor 5
2 shows the case where no light is received and the state is "dark". Further, (C) and (d) of the same figure show the case where the film 1a generates the above-mentioned "bright" and "dark" signals, respectively, when the film 1a is in an empty winding state or in a normal winding state.

In addition, 5 infrared light emitting diodes and 52 phototransistors
are disposed at positions perpendicular to the moving direction of the film 1a, and the distance between them is a multiple of the perforation pitch of the film 1a, so that the infrared light emitting diode 51
The infrared light from the film 1 passes through prisms 34 and 35.
The light passes through the perforation a twice and enters the phototransistor 52.

FIG. 9 shows a side view of the film fall prevention mechanism, and FIG. 10 shows a plan view of the film cartridge. Figure 9 (
In a), the tip of the film la is prevented from falling into an aperture (not shown) during empty winding by the fall prevention plate 17, and point P on the lower side of the film Ia is still at the detection part 20a of the film detection lever 20 at this time. has not been reached. FIG. 9(b) shows a normal feeding state. That is, the film detection lever 20 is rotated clockwise by the film la against a spring (not shown), and the fall prevention plate 17 is rotated counterclockwise via the drive lever 19 shown by the broken line, thereby removing the film from the photographing optical path. It has been evacuated.

FIG. 11 is a sectional view of a planetary gear mechanism that transmits the output of the motor 21 to the storage table 3 or the film feeding system, and which is combined with the locking lever 28 to constitute a clutch switching mechanism.

FIG. 12 is a cross-sectional view showing the relationship between the main body 13 and the rear lid 11.
By inserting the film 1a, a tunnel amount for the film 1a to pass is secured between the inner rail 13a of the main body 13 and the flat surface 11c of the rear cover 11 (FIG. 2).

FIG. 13 is a sectional view showing a conventional example corresponding to FIG. 12, in which 61 is a main body, 61a is an inner rail, 61b is an outer rail, and 62 is a pressure plate biased rightward in the figure by a pressure plate spring 63. , 64 is a back cover, and the pressure plate 62 is connected to the outer rail 61.
By pressing it against b, a tunnel amount is secured between the pressure plate 62 and the inner rail 61a of the main body 61. In the case of such a conventional example, the curling of the film la pushes away the pressure plate 62 against the pressure plate spring 63 during the empty winding of the film Ia, and the film la protrudes from the outer rail 61b that regulates its width direction. Sometimes I put it away. In this case, even if the film la reaches the spool 15, it will not engage with the claw 15d, and there is a high possibility that loading will fail. On the other hand, in the case of the mechanism shown in FIG. 12, the pressure plate and pressure plate spring are eliminated, the rear lid II is fixed to the main body 13, and the outer rail lla protrudes from the rear lid 11 side. Therefore, the recess 13b of the main body 13
There is no possibility that the film la will be inserted between the two, and the probability of successful loading without compromising the regulation of the film la in the width direction is extremely high.

FIG. 14 is a block circuit diagram of the camera of the present invention. In the same figure, 71 is a central processing circuit that processes signals from the photo ink club signal processing circuits 73 and 74 and sends them to the motor drive circuit 72 and the motor 21. issue an energization command. That is, the light reception information of the phototransistor 52 is inputted to the photointerrupter signal processing circuit 73 and then inputted to the central processing circuit 71, where it is processed and inputted to the motor drive circuit 72. Based on this, motor 2
1 is energized. On the other hand, information from the photo-interrupter 43 is also processed by the photo-interrupter signal processing circuit 74 and then processed by the central processing circuit 63.
2 is input. Based on this, the motor 21 is energized to drive the cartridge storage chamber.

FIG. 15 shows the flowchart 1 of the central processing circuit for the cartridge storage chamber opening/closing sequence, the film empty rewinding sequence, and the empty film winding sequence, and FIG. , C
D and E respectively indicate the output and input of the photo ink converter for detecting the position of the cartridge storage chamber, and D and E indicate the timing of the light emission of the infrared light emitting diode 51 and the light reception of the phototransistor 52, respectively, which are used to detect the film leading edge and perforations. It shows.

The flowchart shown in FIG. 15 will be explained below.

First, at #l, it is determined by the switch 54 whether the cartridge storage chamber 3 is in the protruding state or in the retracted state.

Here, if the switch 54 is OFF, it is in the protruding state.

If it is ON, the state of the switch 55 interlocked with clutch switching is further checked in #2, and if it is ON, energization of the motor 21 in the forward direction is started in #3.

At #4, the photo interrupter 43 counts the light and dark pattern 3h of the cartridge storage chamber 3, and when the count reaches M at #5, the motor 21 is stopped at #6.

At this point, the cartridge storage chamber 3 is in a protruding state and rotated by the torsion spring 10, so that the switch 54 is turned off. Load the film cartridge l or leave it empty against the torsion spring 10 in the cartridge storage chamber.
When 3 is pressed, the switch 54 is turned ON at #7, the motor 21 is reversely energized at #8 and the cartridge storage chamber 3 starts to be stored, and the light and dark pattern 3h is counted by the photo ink printer 43 at #9. #10 When the count reaches M, #1
0, reverse energization to the motor 21 is stopped, the cartridge chamber 3 is retracted, and at the same time, the switch 55 is set to 0FFL and clutch switching is also performed.

Next, when the switch 54 is ON and the switch 55 is OFF, the motor 21 is reversely energized in step #12, and the film A is rewound. In #13 to #15, if the count is O even after a certain period of time T, based on the light reception signal of the phototransistor 52, the reverse current to the motor 21 is stopped, and in #16, the reverse current to the motor 21 is stopped. energize. #17 to #19
, the perforation count is 1 (or 2).
), immediately stop energizing the motor 21 in the forward direction, and then energize the motor 21 in the reverse direction again at #12. As shown in #20, when counting is started and the count interval, that is, the perforation movement time Δt becomes longer than the predetermined time T2, it is assumed that the leading edge of the film 1a has been detected, and the motor 21 is activated in #21. Stops reverse energization to and ends idle rewinding. Immediately, the motor 21 is energized in the forward direction at #22, and the predetermined number N of perforations required for dry winding is counted at #23, #24, and then the energization to the motor 21 is stopped at #25. Dry winding ends. Thereafter, each time the release is performed in #26, the AF and AE mechanisms (not shown) are activated in #27, and then the motor 21 is energized in #28 and as the film la is wound, #29. When the perforation count reaches 8 in #30, the process of stopping the energization to the motor 21 in #31 is repeated.

Next, the operation of the autoloading mechanism of this embodiment will be explained. First, the cartridge storage room 3 in Figure 4(a)
From the stored state, use the release knob (not shown) on the bottom of the camera to act on the convex portion 28f at the tip of the lever part 28d of the locking lever 28, and spring the locking lever 28 around the shaft hole 28c. 30 in the direction of the arrow in FIG. 5(a). Then, the lever portion 28d moves to the position shown by the dashed line, and the switch 55 is turned on and the motor 2
1 starts normal rotation. This rotation is transmitted through the gear train 23 so as to rotate the large gear 24a of the gear 24 in a counterclockwise direction. Since the small gear 24b of the gear 24 meshes with the three gears 26, the gears 26 are rotated clockwise. At this time, the gear 25 having the shaft 25b of the gear 26 is in the fifth position.
As shown in Figure (b), since the ratchet portion 25c is locked by one pawl 28a of the locking lever 28, the three gears 26 do not revolve but rotate. The gear 27 meshing with the internal teeth 27c is
Rotate clockwise to slide the storage stand 8 in the direction of arrow B in FIG. When the storage stand 8 starts sliding,
The detection lever 29 that was in contact with the end 8e of the storage stand 8 rotates clockwise due to the biasing force of the spring 3], and one end 29
c comes into contact with the lever portion 28d of the locking lever 28, so even if the release knob (not shown) is released, the locking lever 28
Since one pawl 28a remains engaged with the ratchet portion 25c of the gear 25, the storage stand 8 continues to move in the direction of arrow B due to the clockwise rotation of the gear 27.

Then, it slides a predetermined amount regulated by the guide hole 8c (
Fig. 6(b)) and the claw 3e on the bottom of the cartridge storage chamber 3.
comes into contact with the convex portion 33b provided on the main plate 33, and the storage stand 8
The lock is released. At the same time, the motor 21 is stopped after the photo ink converter 43 has counted a predetermined number M of bright and dark patterns 3h of the cartridge storage chamber 3. Further, the spring lO rotates counterclockwise around the shaft 9, and the slope 3i (FIG. 2) of the cartridge storage chamber 3 comes into contact with the inner surface of the upper wall of the main body 13, and the cartridge storage chamber 3
The entire opening 3a is in an open state. This rotation of the cartridge storage chamber 3 turns off the switch 54. That is, this state as shown in FIG. 4(b) and FIG. 6(C) is a state in which the cartridge 1 can be loaded. In this state, load the cartridge 1 into the opening 3a of the cartridge storage chamber 3 from above (Fig. 1), and press the torsion spring 10.
When the back surface 3b is pressed so that the cartridge storage chamber 3 rotates clockwise against the rotational force, the switch 54 is turned on and the motor 21 starts rotating in reverse. At this time, one claw 28 of the locking lever 28 is detected by the detection lever 29.
a remains engaged with the ratchet 25c of the gear 25, so as the motor 21 reverses, the storage table 8 moves to the rack portion 8.
b in the direction of arrow C in Fig. 5, and insert the guide hole 8C.
Slide the photo interrupter 3 by a predetermined amount regulated by
2 sets the light and dark pattern 3h of the patrone storage room 3 to a predetermined number M
After counting, the motor 21 is stopped. At the same time, the tip of the storage stand 8 comes into contact with the detection part 29a of the detection lever 29, and resists the biasing force of the spring 31 around the shaft hole 29b.
Rotate 9 counterclockwise. As a result, the end portion 29c slides on the side surface of the lever portion 28d of the locking lever portion 28 and attempts to fall into the recess 28e. At this time, due to the biasing force of the spring 30, the locking lever locks the detection lever 29 in such a manner that it grips the end 29c in its mouth. With this operation, one pawl 28a of the locking lever 28 that had previously locked the ratchet portion 25c of the gear 25 is unlocked, and conversely, the other pawl 28b locks the ratchet portion 27c of the gear 27. The transition from the operable state of the cartridge storage chamber 3 to the film winding and rewinding operable state is completed.

Now, the switch 55 is turned OFF due to the movement of the detection lever 29.
It becomes F. Based on this information and information from the photointerrupter signal circuit 74 from the photointerrupter 43, the motor drive circuit 7
2, energization to the motor 21 is started and the pinion 22
The output is transmitted to the small gear 24b of the gear 24 via the gear train 23. At this time, the gear 27 is connected to its ratchet portion 27a.
The gear 24 is locked by the claw 28b of the locking claw 28.
By rotating the small gear 24b in the counterclockwise direction, the three gears 2
6 revolves counterclockwise while rotating clockwise, causing the gear 25 to rotate counterclockwise. This is idle gear 4
2, an idle gear train 5 for rewinding, and a fork gear 6, the fork 7 is rotated counterclockwise to start rewinding the film 1a onto the cartridge 1.

FIG. 7(a) shows this state, in which the film 1a is rewound through a film passage consisting of the cartridge storage chamber 3 and the rear lid 11. At this time, the output of gear 25 is the idle gear 38. The information is transmitted to the one-way clutch gear 39, but is not transmitted to the sprocket rotating shaft 40 due to the one-way clutch mechanism, and is in a free state, so as the film la is unwinded, the upper and lower teeth of the sprocket 41 are connected to the perforations of the film 1a. and is rotated counterclockwise by the film 1a. In this way, the sprocket 41 rotates freely and the film la is rewound into the cartridge l by the fork 7, but the film tip and perforation detection mechanism detects the state shown in FIG. 7(b), that is, the tip of the film la. After a certain period of time has elapsed, the motor 21 is stopped, and as shown in Fig. 7(C).
becomes the state of At this time, the cartridge storage chamber roller 4a is
When the film 1a passes through, it comes into contact with the rear lid 11 due to the spring force of its supporting portion, and serves to shield this portion from light. Further, as mentioned above, the teeth of the sprocket 41 are fitted into the perforations of the film la, so when the motor 21 starts to be energized in the forward direction, the sprocket 41 rotates clockwise via the above-mentioned transmission mechanism, as shown in FIG. Start winding up the film 1a as shown in d). The tip of the film 1a is regulated in its vertical direction by the upper and lower outer rails Ila of the rear lid 11, and forms a flat surface 11c sandwiched between the surface of the inner rail 13a of the main body 13 and the upper and lower outer rails Ila of the rear lid 11.
pass between. Further, since the width of the leading end of the film 1a is narrow, a fall prevention mechanism is provided to prevent the leading end of the film 1a from being caught on the end of the aperture of the main body 13 on the spool chamber side. To explain using Fig. 9, the figure (a)
indicates a state in which the leading edge of film 1a is depressed,
The leading edge of the film la is riding on the fall prevention plate 17.

At this time, the P portion of the film Ia (FIG. 10) has not reached the film detection portion 20a of the film detection member 20.
As the film la is further wound up, the P portion rides on the film detection portion 20a of the film detection member 20, so that it rotates clockwise about the hole 20b against the biasing force of a spring (not shown). Accordingly, the drive lever 19 has its cylindrical portion 19d located at the opening 2 of the fill person detection member 20.
The inner end surface of 0a starts to rotate counterclockwise about the shaft 19b. The fall prevention plate 17 is the drive lever I9
Since it moves in unison with the other parts, it begins to rotate counterclockwise in the same way.

However, at this time, the leading edge of the film la has already rested on the drop prevention plate 17, and the film 1a can be guided into the spool chamber of the main body 13. Also, the position of the drop prevention plate 17 shown in FIG. 9(b) is When shooting, the camera is evacuated to a position where it does not block the light beam.

The leading edge of film la is guided into the spool chamber, and spool 1
When the perforation is caught by the pawl 15d of No. 5, the rotational speed of the spool 15 is set to be faster than the rotational speed of the sprocket 41. Therefore, the rotation speed of the film 1a pulled by the spool 15 is greater than the rotation speed of the one-way clutch gear 39. The rotation is faster, and the power transmitted by the one-way clutch gear 39 is no longer transmitted to the rotating shaft 40, so the sprocket 41 that rotates as one is also in a free state, and the film la will be wound up by the spool 15 from now on. become.

When the film leading edge and perforation detection mechanism counts a predetermined number N of perforations on the film la, the motor 2 is stopped and the empty winding of the film la is completed. Thereafter, the film is wound up in conjunction with the release operation, and the leading edge of the film and the perforation detection mechanism count 8 perforations to advance one frame.

Next, the film leading edge and perforation detection mechanism will be explained in detail. In FIG. 8, 51 is an infrared light emitting diode, 52 is a phototransistor, and is located at the height of the perforation above the film la of the main body 13.
And they are arranged at intervals that are an integral multiple of the perforation pitch.

A mask 53 is placed in front of the infrared light emitting diode 51 and the phototransistor 52, and has openings 53a and 53b at corresponding positions. When the infrared light emitted from the infrared light emitting diode 51 is not blocked by the film 1a, the prism 35.
Light enters the phototransistor 52 as indicated by the arrow shown in (C).

Now, if we consider the case of FIG. 8(a), that is, when the part of the film la exposed outside the camera is rewinded, the infrared light from the infrared light emitting diode 51 is first emitted by the prism 35. The light changes its course twice, passes through the perforation of the film Ia, and enters the prism 34, where it reaches 180
°Turn around and leave.

Here, since the prism 34 is designed such that the center pitch of light input and light output corresponds to the pitch of the perforations, the light coming out of the prism 34 passes through the perforations of the film la, penetrates the prism 35, and passes through the phototransistor 52. sunlight enters.

This state is called "bright".

Next, if we consider a state in which the film 1a has moved by a half pitch of the perforations as shown in FIG. The light attempts to enter the prism 34, but is blocked by the film 1a in front of it. Therefore, no light enters the phototransistor 52, and this state is called "dark."

Furthermore, when the film la is moved by the half pitch of the perforations, the state shown in FIG.
When light enters 2, it enters a bright state.

Furthermore, the infrared light emitting diode 51 emits light in synchronization with the energization of the motor 21. In the state shown in FIG. 7(b), that is, in the state where the film 1a is unwound and the leading edge of the film 1a is just removed from the prism 34, the phototransistor 52 receives the above-mentioned "bright", "dark", "dark J", "bright", etc. Ko···
``Brightness'' continues to enter from the repetition of . If this state continues for a certain number of seconds or more, it is determined that the leading edge of the film 1a has been detected, and after a certain period of time has elapsed since the last "dark", 2TIM to motor 2] is stopped, resulting in the state shown in Fig. 7(c). become. From this state, dry winding is performed by energizing the motor 2I in the opposite direction. When the motor 21 is energized, the infrared light emitting diode 51 emits light, and according to the above-mentioned principle, the phototransistor 52 repeats the "bright" and "dark" states, and after counting a predetermined number of times, the motor 21 is no longer energized. It is stopped and the dry winding ends. After this, the film 1a is wound based on the release operation, and the motor 21 is operated to count 8 perforations corresponding to one frame of the film, that is, 8 times "bright" and "dark" or "dark" and "bright". energization and de-energization will be carried out.

The telescope that shields the exit of the film la of Patrone 1 from light is flocked so as to fit in the winding direction of the film la. Therefore, when rewinding the film into the cartridge from the beginning, i.e., performing blank rewinding, depending on the film, the hairs of the television may get stuck in the perforations, increasing the load on rewinding, and in some cases, rewinding may not be possible. .

Therefore, as a countermeasure, if the film tip and the perforation detection mechanism cannot confirm the movement of the perforations within a certain number of seconds after the start of energization to the motor 21, the reverse energization is immediately stopped for a certain number of seconds after the energization to the motor 21 is stopped. At the same time, the film 1a is fed out by one or two perforations in the winding direction by rotation of the sprocket 41. Here, the cartridge storage chamber 3 and the rear cover 1
The film path formed by 1 and 1 is stepped for light shielding. For this reason, it is impossible to feed the film la out of the camera 2, and the film 1a is
As shown by the broken line in figure (a), the rear cover 11 and sprocket 4
It will be sent out with a deflection between it and 1. By once pulling out the film 1a from the batrone 1 in this way, the above-mentioned perforation of the film la and the insertion of the hair flocking of the television tape of the cartridge 1 are released, and thereafter, by energizing the motor 21 in the rewinding direction again, the blank winding is performed. Returning will now be done smoothly.

In the above embodiment, film feeding using a sprocket was explained, but the first one without using the four sprockets
As shown in FIG. 9, a pressing roller 48 and a pinch roller 49 having an elastic member such as rubber wrapped around the pressing roller 49 and a pinch roller 49 may be used. At this time, it is desirable to press only the vicinity of the perforations of the film 1a and to provide a step in the pressure roller 48 and the pinch roller 49 rotatably attached to the cartridge storage chamber 3 so as not to damage the photographing screen area. . Further, like the sprocket 41 of the above embodiment, this pressure roller 48 also has a one-way clutch mechanism in the middle, and when the tip of the film 1a engages with the pawl 15d of the spool 15, the rotational speed of the spool is faster. The pressure roller 48 becomes free.

Therefore, it becomes free even when rewinding.

Furthermore, the position detection of the cartridge storage chamber 3 may be performed by contact detection using a contactor instead of non-contact detection using a photo ink rubber.

The roller unit 4, which also serves to shield the film path between the rear lid 11 and the cartridge storage chamber 3, has a separate roller 4a as shown in FIG.
As shown in Fig. 1, the roller part 4a' is integrally molded with the roller unit 4' and finished with good sliding properties, so that the roller part 4a does not rotate but has elasticity using a resin or metal plate. Good too.

Furthermore, although two prisms are used in the film tip and perforation detection mechanism of the above embodiment,
As shown in FIG. 18, extending the cartridge storage chamber 3 increases the size of the cartridge storage chamber 3, which is a movable part.
By changing the position and size of the prism 47 to correspond to the pitch of the infrared light emitting diode 51 and the phototransistor 52, the prism 35 described above becomes unnecessary, so the design can be improved.
Either one can be selected from the viewpoint of cost.

Regarding the structure of the rear lid 11, as shown in FIG. 22, a method may be adopted in which the metal plate 53 is fixed to the plane 11c from the viewpoint of the flatness of the plane lie and strength. Also. From the viewpoint of strength, the flat surface 11c needs to be thick to some extent, but it does not cause sink marks or gloss during molding.

If unevenness is a problem, the above-mentioned problems in terms of strength and molding can be solved by forming a plurality of ribs llc in a protruding manner as shown in FIG.

Furthermore, in the embodiment, a convex outer rail ll is provided on the rear cover 11.
a, a recess 13b into which the outer rail lla fits into the main body 13;
However, on the contrary, there is a recess in the rear lid.

A similar effect can be obtained by forming a convex portion on the main body.

In addition to the above-mentioned method, in addition to the above-mentioned method, when the cartridge storage chamber 3 is stored in the camera 2, the motor 21 is energized in the winding direction prior to unwinding the sprocket. 41, the film 1a is fed out by 1 to 2 perforations (the state shown by the broken line in FIG. 7(a)), and after releasing the hair flocking of the cartridge 1 from the perforations of the film 1a, the motor 21 is reversely energized. By doing so, it is also possible to smoothly perform empty rewinding. The sequence of the central processing circuit in this case will be explained based on the flowchart of FIG. Here, since the operation of the cartridge storage chamber 3 is the same as the sequence shown in FIG. 15 described above, the explanation will be omitted and will be explained from the state where the switch 55 is OFF.

First, in step #51, prior to empty rewinding, the winding direction, that is, the forward direction energization of the motor 21 is started. Next, in #52, the perforations are counted, and when the count reaches 1 (or 2) in #53, the power supply to the motor 21 is stopped in #54. Thereafter, the motor 21 is immediately reverse energized in #55, and #56. The perforations are counted in #57, and when the count interval, that is, the moving time Δt of the perforations, becomes longer than the predetermined time T2, it is assumed that the leading edge of the film 1a has been detected, and the motor 2I is reversely energized in #58. to end empty rewind. Immediately, the motor 21 starts to be energized in the positive direction at #59, and @60. When counting the predetermined number N of perforations required for empty winding in #61, #
At step 62, the power supply to the motor 21 is stopped, and the idle winding is completed. Further, for each release of #63, after the AF and AE mechanisms (not shown) are activated in #64, the motor 21 is activated in #65.
When the perforation count reaches 8 as the film Ia is wound at #66 and #67, the power to the motor 2I is stopped at #68.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to eliminate the pressure plate that was conventionally provided on the back cover of the camera for pressing and biasing the film, thereby providing a camera that can be loaded reliably at low cost. be able to.

Furthermore, since the light shielding member in the middle of the film path is integrally formed with the pressing member that presses the film winding drive toward the film winding drive means, the structure can be simplified and costs can be reduced.

[Brief Description of the Drawings] Fig. 1 is a schematic perspective view of the camera of the present invention, Fig. 2 and Fig. 3 are schematic perspective views of the camera of the present invention.
The figure is an exploded perspective view showing the main components of the camera of the present invention, Figures 4(a) to (C) are perspective views showing the camera of the present invention in different operating states as seen from the rear, Figure 5(a), (b)
6 is a plan view showing clutch switching states between the storage stand and the planetary gear mechanism in different operating states, and FIGS. 6(a) to (C) are side views showing the relationship between the cartridge storage chamber and the storage stand in different operating states. Figures 7(a, ) to (d) are cross-sectional views showing the film tip and perforation detection mechanism showing different operating states, and Figures 8(a, ) to (d) are sectional views showing different operating states. Enlarged view of the main parts of Figure 7, Figure 9 (a),
(b) is a side view of the film fall prevention mechanism showing different operating states, Figure 10 is a plan view of the film cartridge with a part of the film pulled out, and Figure 11 is a side view of the film cartridge preventing mechanism showing different operating states. 12 is a sectional view showing the relationship between the main body and the rear cover, FIG. 13 is a sectional view showing a conventional example corresponding to FIG. 12, and FIG. 14 is a sectional view of the camera of the present invention. Block circuit diagram, 15th
16 is a timing chart corresponding to the flowchart in FIG. 15, FIG. 17 is a sequence flowchart showing another embodiment of the present invention, and FIG. 1 is a sectional view showing another embodiment of the detection mechanism of
9 is a sectional view showing another embodiment of the film feeding mechanism, FIG. 20 is a perspective view of the roller unit of the present invention, and FIG.
The drawings are similar to FIG. 20 showing another embodiment, FIG. 22 is a sectional view showing the relationship between the main body and the rear cover of another embodiment of the present invention, and FIG. 23 is a diagram similar to FIG. 20 showing another embodiment of the present invention. FIG. 3 is a sectional view showing the relationship between the main body and the rear lid according to the embodiment. l...Film patrone Ia...
・・・・・・・・・・・・Film 2・・・・・・・・・
......Camera 3...Patrone storage room 8......Storage stand 21...・・・・・・・・・Motor 4th
Flash (ku) Fig. 4 (b) 4th fork (C) 5th bi (b) Fig. 5 (ku) Male ε Fig. (I)) cd) (b) 2θ 25b Fig. 74

Claims (1)

[Scope of Claims] (1) It has a storage section for storing a film cartridge, and is provided with a cartridge storage chamber that can protrude to the outside of the camera, and after loading the film cartridge into the protruding cartridge storage chamber, the cartridge is stored. In a camera configured such that when the chamber is stored in the camera, the film pulled out from the film cartridge is automatically wound across the aperture in the camera, and the cartridge storage chamber is located at a portion of the back of the camera. The camera body is made to be opened, and other parts are covered by a rear lid, and the rear lid is integrally fixed to the camera body and has two guide portions on its inner surface for supporting both ends of the film in the width direction. A camera characterized in that a book guide part is fitted into two guide parts provided on the outside of two inner rails provided on the camera body side. (2) The camera according to claim 1, characterized in that a metal plate is provided between the two guide portions provided on the rear cover. (3) Claim (1) characterized in that a plurality of convex portions are formed between the two guide portions provided on the rear lid, parallel to the guide portions and lower in height than the guide portions. Camera listed. (4) It has a storage section for storing a film cartridge, and a cartridge storage chamber that can protrude to the outside of the camera, and after loading the film cartridge into the protruding cartridge storage chamber, the cartridge storage chamber is stored inside the camera. Then, in a camera configured so that the film pulled out from the film cartridge automatically crosses an aperture in the camera and is unwinded, there is a film in the middle of the film path between the cartridge storage chamber and the camera body. teeth,
A light shielding member that functions to shield the path from light after completion of empty rewinding for a length longer than the width of the film, and a pressing member that presses and urges the film toward the winding drive means are provided, and the light shielding member and the pressing member are integrally formed. A camera characterized by being formed. (5) The camera according to claim 4, wherein the light shielding member is a rotatably supported roller member.