JPS63281146A - simple loading camera - Google Patents

Abstract

PURPOSE:To improve operability by providing a cover which closes a cartridge room, an electrically-driven driving means for driving to close the cover and a control means for actuating the electrically-driven driving means by answering that the cover is moved from an opening state to a closing direction. CONSTITUTION:The cover 4 which closes the cartridge room 8c, the electrically- driven driving means for driving to close the cover 4 and the control means for actuating the electrically-driven driving means by answering that the cover 4 is moved from the opening state to the closing direction are provided in a camera where the leader part F of a film is drawn into the camera and wound to a spool 10 after the cartridge room 8c is closed in a state where the leader part F is left outside the camera. Therefore, the cover 4 is electrically driven to be closed and also the starting of driving is executed in an easy method related to the closing action of the cover such as the operation of the cover 4 in the closing direction. Thus, the operability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera, and more particularly, after a cartridge chamber is closed with a film leader remaining outside the camera, the leader automatically closes the camera. This invention relates to an improvement in a camera that is retracted into a spool and wound on a spool.

[Prior art]

Cameras that use a strip of film in a cartridge have the disadvantage that loading the film is complicated. Therefore, various proposals have been made for cameras that can simplify the film loading operation in the above-mentioned type of camera.

The present applicant also applied for a patent application in 1986-58 for a new camera with simple film loading that allows for very easy film loading.
928, etc.

The above-mentioned new camera of the easy-to-load film type proposed by the present applicant is designed so that when loading film, the user attaches the cartridge to the cartridge chamber and leaves the film leader protruding from the vaginal cartridge outside of the camera. In this camera, film loading can be completed simply by closing the lid of the cartridge chamber without requiring any other operations.

That is, in the above-mentioned new camera proposed by the applicant,
When loading film, if the user closes the lid of the cartridge chamber with the film leader part protruding from the cartridge left outside the camera, the film leader part exposed outside the camera is automatically pulled into the camera. After that, the film leader part is wound around the spool by dry winding, and the loading of the film is completed.

In the camera already proposed by the applicant, which has the above-mentioned functions, the film loading operation is extremely simple, and it is more distinctive and easier to use than conventional cameras, but the following points remain to be improved. It had been.

In other words, in the camera, most of the process of loading film has been automated, making it extremely easy to load the film, but the user still has to manually operate the lid of the cartridge chamber. Of course, this was a bit of an annoyance.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and after the cartridge chamber is closed with the film leader remaining outside the camera, the leader is drawn into the camera and wound onto the spool. In the attached camera, a lid for closing the patrone chamber, an electric driving means for driving the mirror lid to close, and an electric driving means for operating the electric driving means in response to the lid being moved from an open state to a closing direction. In the camera of the above type, the lid is electrically driven to close, and the drive is started by an easy-to-understand method related to the closing operation of the mirror lid, which is an operation of the mirror lid in the closing direction. The present invention aims to provide a simple loading camera that can further improve operability.

[Embodiments of the invention]

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

FIG. 1 is an external perspective view of a camera according to the present invention, showing a state in which the back cover is opened. l is the exterior material of the camera, 2 is the finder eyepiece, 3 is the release button, 4
is the back cover that opens and closes the cartridge chamber, 6 is the oven button,
7 is a feeding roller.

FIG. 2 is a cross-sectional view of the camera shown in FIG. 1, showing a state in which a film cartridge is loaded. 8 is the camera body,
It has a spool chamber 8a and an aperture 8b, and also has an exterior material 1.
Together, they form a patrone chamber 8c. A film guide roller 9 is pressed against the outer periphery of the spool 10 by a known method. A pressure plate 11 cooperates with a pressure plate spring 12 to form a known film passage section. Reference numeral 13 designates one contact piece forming a film leading edge detection switch, which has the same shape and is fixed to the exterior casing 1, and is connected to a control circuit to be described later. The other contact piece 14 forming a film tip detection switch is attached to the back cover 4.
Further, a film pressing roller 15 is fixed to the cartridge pressing protrusion 4a and a light-shielding stepped portion 4b are integrally formed, and the back cover 4 itself is rotated concentrically with the rotation axis of the film rewinding fork on the main body 8. It is pivoted to make it possible. Further, the feeding roller 7 is also rotatably supported by the main body 8.

P is a film cartridge stored in the cartridge chamber 8c, F is a film leader section, Pl is a film outlet in the cartridge P, and 16 is a photographing lens. A glass plate 59 is attached to the main body 8 at a location corresponding to the aperture surface of the aperture 8b.

FIG. 3 is a plan view showing the gear configuration of the camera shown in FIG. 1, and each gear shown here is rotatably supported by a base plate (not shown) or the main body 8 unless otherwise specified. 17 is a pinion gear 18 fixed to the output shaft of the motor, which will be described later.
Reduction gears 19 and 20 are integrally formed with two large and small gears, which mesh sequentially from the pinion gear 17 to reduce the rotation of the motor and generate high torque. 21 is a first sun gear that meshes with the reduction gear 20;
It is rotatably supported together with the first planetary lever 22 . 23
is a first planetary gear that meshes with the first sun gear 21 and is rotatably supported by the first planetary lever 22 via appropriate friction. 10a is a spool gear integrally formed with the spool lO shown in FIG.
The driving force from the first planetary gear 23 can be transmitted through the first planetary gear 23. 24 is a second sun gear, intermediate gear 60.
61 to the first sun gear 21, and the second
Planetary lever 25. A crank lever 26 is rotatably supported by a gear shaft 27. A second planetary gear 28 meshes with the second sun gear 24 and is rotatably supported by the second planetary lever 25 via friction. Further, the shaft 29 of the second planetary gear 28 projects to the upper surface side of the second planetary lever 25.

The crank lever 26 includes arms 26a, 26b, and a locking portion 26.
c and is biased counterclockwise by the spring 30, and the arm 2
6a is in contact with the pin 4c of the back cover 4. The gear 7a is a gear formed integrally with the feeding roller 7 shown in FIG. 2, and is arranged so as to be able to mesh with the second planetary gear 28. 32
is a cam gear having a gear 32a on a part of its outer periphery, and is connected to the second sun gear 24 via an intermediate gear 31 by this gear 32a. Also, the cam gear 32 is a charge cam 32b.
are integrally formed, and are always urged by a spring 33 so as to mesh with the intermediate gear 31. A locking lever 34 has a claw 34a and an arm 34b, is rotatably supported on a shaft 35, and is urged counterclockwise by a spring 36 to abut against a stopper 37. Further, the arm 34b of the locking lever 34 can engage with the charge cam 32b. A hook lever 38 has a hook portion 38a that can be engaged with the arm 26b of the crank lever 26 at its tip, and a pin 3.
8b, is rotatably supported by a shaft 39, is biased counterclockwise by a spring 40, and comes into contact with a stopper 41. , 42 is a tension lever with a claw 42a, an arm 42b,
42c, is rotatably supported by a shaft 43, and has a spring 44.
is biased clockwise by. In addition, the tension lever 4
The second arm 42c can engage with the pin 38b of the hook lever 38. 6 is the oven button shown in Figure 1,
It is slidably guided by the exterior material 1, one end protrudes to the outside of the camera, and the other end engages with the tension lever arm 42b. 4
Reference numeral 5 denotes a fork gear which is disposed above the camera and is keyed to a rewinding fork, which will be described later, and is connected to a first input gear 47 via an intermediate gear 46. On the other hand, this first manual gear 47 is arranged so as to be able to mesh with the second planetary gear 28.

48a is a gear disposed below the camera and integrated with a charge disk 48, which will be described later, and is connected to the second manual gear 51 via intermediate gears 49 and 50. 2nd manual gear 51
is extended from the bottom side of the camera to the top side of the camera by a shaft, and a second human-powered upper gear 51a is fixed to the tip thereof, and this second human-powered upper gear 51a is arranged so as to be able to mesh with the second planetary gear 28. There is. The charge disk 48 has a large diameter portion 48b and a pin 48c@, which are in contact with the pawl 42a of the tension lever 42, and is biased counterclockwise by a spring 52. Further, the back cover 4 is provided with a pin 4d, which can be engaged with a side surface 48d of the large diameter portion 48b of the charge disk 48. Reference numeral 53 denotes an absorption spring, which is hung between the charge disc pin 48c and the back cover pin 4d.
rotate integrally via the absorption spring 53. 62 is a normally open back cover half-open switch with two contact pieces 62a and 62b.
The contact piece 62a can be engaged with the pin 4C of the back cover 4. 63 is a start contact piece fixed to the back cover 4. Reference numeral 64 denotes a start board on which the start contact piece 63 can slide, and has a copper foil portion 64a. The start contact pieces 63 do not come into contact with the copper foil portion 64a when the back cover 4 is in the open position as shown in FIG. A copper foil portion 64a of the start board 64 is electrically connected to a control circuit to be described later.

Figure 4 is a vertical sectional view of the cartridge chamber of the camera in Figure 2.
This figure shows the arrangement in the height direction of each component shown in the plan view of FIG. 3, and the same parts are designated by the same numbers. Reference numeral 54 denotes a rewinding fork, which is rotatably supported by the holder 55 and is keyed with the fork gear 45 in FIG. 3, so that it can slide vertically relative to the fork gear 45. , rotates following the rotation of the fork gear 45.

Further, the rewinding fork 54 can be operated vertically in conjunction with the movement of the back cover 4 by a known mechanism (not shown), and is housed in a holder 55 as shown in Fig. 4 when the back cover is opened. , when the back cover is partially closed, it can enter the inside of the back cover 4 and engage with the cartridge P.

Reference numeral 56 denotes a shaft that rotatably supports the charge disk 48, and the tip 56a passes through the main body 8 and serves as the lower rotation axis of the back cover 4, which is concentric with the rotation axis of the rewinding fork 54. . The upper rotation axis of the back cover 4 is the outer periphery of the fork gear 45, which is also concentric with the rotation axis of the rewinding fork 54. Therefore, the back cover 4 is configured to rotate concentrically with the rotation center of the rewinding fork 54.

FIG. 5 is a perspective view of the camera back cover 4 and cartridge P of FIG. 1. In FIG. 4, the back cover 4 has a semi-cylindrical shape, and includes a cartridge holding projection 4a, pins 4d, 4c, a shank 4e, a light shielding part 4b, a cartridge shaft relief 4f, and upper and lower rotation holes 4g, respectively. 4h is integrally formed and consists of two conductive contact pieces, one contact piece 14. A film pressure roller 15 is attached. Further, the start contact piece 63 is attached to one end surface. Reference numeral 13 designates the other contact piece of the above-mentioned film tip detection switch attached to the exterior material l. Also provided within the back cover 4 is a cartridge detection switch, which will be described later, for detecting that a cartridge P is loaded.

FIG. 11 is a block diagram showing the control circuit of the camera of FIG. 1. In FIG. 11, 101 is a release switch that is closed when the release button 3 shown in FIG. conduct. 103 is a start switch that is closed when the start contact piece 63 shown in FIG. 3 and the copper foil portion 64a of the start board 64 come into contact; 104 is a film tip made up of the contact pieces 13 and 14 shown in FIG. 2; With the detection switch, if the film leader part protrudes outside the camera, the film will be removed from the contact piece 13.
, 14 is a film leading edge detection switch 104.
is off, and when the film leader section is pulled into the camera, the contact pieces 13 and 14 come into contact and turn on. 105 and 106 are inverters that invert and output the input signals; 107 is a known tension detection circuit that detects when the film is stretched at the end position as the winding progresses; and 108 is linked to the movement of the film. 109 is a motor as an electric drive means to which a pinion gear is fixed as shown in FIG. 3, and 110 is a known device for controlling forward and reverse rotation of the motor 109. motor drive circuit,
Reference numeral 111 denotes a known rewinding control circuit for controlling the rewinding of the film, and when the start switch is closed while the film leading edge detection switch is turned off and the input from the inverter 105 is missing, or the tension detection circuit 107 In response to the detection of tension, a signal is output to the motor drive circuit 110 to cause the motor drive circuit 110 to perform a rewinding operation. Reference numeral 112 denotes a known winding control circuit that controls the winding of the film, and when the film leading edge detection switch is turned on, or when an exposure completion signal is input from the exposure control circuit 102 and the tension detection circuit 107 is activated via the inverter 106. When a state in which no tension is detected is output, a signal is output to the motor drive circuit 110 to start winding, and
In response to the number of times the feed switch lO8 is turned on and off, the film is wound up by a specified blank feed amount or l frame feed type. 11
3 is a film stand switch that detects that the rewinding of the film into the cartridge is completed, and 114 is a cartridge detection switch that detects that the cartridge P is loaded into the cartridge chamber 8C.

Next, the operation of the above configuration will be explained with reference to FIGS. 1 to 11. Incidentally, FIGS. 6 to 10 are for explaining the operating state of the above structure, and the same reference numerals are given to corresponding parts to those in FIGS. 1 to 5.

First, as shown in FIG. 2, the back cover 4 is opened and the cartridge P is loaded into the cartridge chamber 8c. At this time, in the conventional camera, the film outlet part P1 of the cartridge P is connected to the aperture 8b.
(the direction in which the film is pulled out is parallel to the aperture surface or the glass plate 59), but according to this embodiment, the back cover 4 is set parallel to the rotation center of the rewind fork. Since they rotate concentrically, the film can be loaded without worrying about the orientation of the film outlet P1, even if the cartridge is loaded with the film outlet oriented in the direction P2 in Figure 2, for example. ing. Also, in the state shown in Fig. 2 with Patrone P loaded, each gear.

The levers etc. are in the state shown in Figure 3.

Then, from this state, the back cover 4 is moved a little in the closing direction (clockwise in FIG. 3). As a result, the start contact piece 63 and the copper foil part 64a of the start board 64 come into contact, and the start switch 103 shown in FIG.
Furthermore, as shown in FIG. 2, since the contact pieces 13 and 14 are not in contact, the 11th
In the figure, the film leading edge detection switch 104 is off, and this signal is input to the rewind control circuit 111 via the inverter 105, and these signals cause the rewind control circuit 111 to cause the motor drive circuit 110 to rotate the motor 109 in the film rewind direction. give a signal to do so. As a result, the motor 109 rotates in the normal direction, and the pinion gear 17 starts rotating clockwise in FIG. 3. As the pinion gear 17 rotates clockwise, the first sun gear 21 also rotates clockwise via the reduction gears 18 to 20, the first planetary gear 23 separates from the intermediate gear 58, and the shaft of the planetary gear 23 reaches the stopper 57. They come into contact and stop (state shown in Figure 6). Also, the second sun gear 2
4 rotates counterclockwise via intermediate gears 60 and 61,
The second planetary lever 25 also rotates counterclockwise, but the shaft 29 hits the locking portion 26c of the crank lever 26 and stops. In this state, the second planetary gear 28 meshes with the second human-powered upper gear 51a, so that the second human-powered lower gear 51 to the intermediate gear 49.5
0 to rotate the charge gear 48a clockwise. As the charge gear 48a rotates, the charge disk 48
When the back cover 4 rotates clockwise against the spring 52, the pin 4d of the back cover 4 is pushed by the absorption spring 53, and the back cover 4 also rotates clockwise, so that the back cover 4 becomes concentric with the center of rotation of the film rewind fork. It begins to rotate in the closing direction. At this time, even if the film outlet part P2 of the cartridge P floats outward as shown in FIG. 2, the cartridge P
is pushed in by the cartridge holding projection 4a of the back cover 4 so that the orientation of the film outlet portion P2 is parallel to the aperture surface. Therefore, the orientation of the film outlet of the cartridge P is automatically corrected as the back cover is closed. Furthermore, even if the back cover 4 is inadvertently stopped by pressing the back cover 4 with a finger or by getting an object caught during this back cover closing operation, the charge disc 48 and the back cover are connected to each other via the absorption spring 53. 4 are interlocked, the charge disk 48 continues to rotate without damaging the motor, gear train, etc.

As the second sun gear 24 rotates counterclockwise, the cam gear 32 also rotates counterclockwise via the intermediate gear 31.

However, since the cam gear 32 does not have teeth on the entire circumference of the gear 32a, the charge cam 32b engages with the arm 34b of the locking lever 34 to rotate the locking lever 34 clockwise by a certain angle, as shown in FIG. stop in the state. In this state, the claw 34a of the locking lever can engage with the protrusion 4e of the back cover 4.
When the back cover 4 is rotated by a certain angle, the protrusion 4e and the claw 34a engage, and the back cover 4 is stopped in a half-open state. On the other hand, the charge disk 48 further rotates while charging the absorption spring 53, and when the charge disk 48 rotates to a predetermined position, the claw 42a of the tensioning lever 42 engages the large diameter portion 48b of the charge disk 48.
When the arm 42c falls, it locks the side surface 48d of the large diameter portion 48b and prevents the charging disk 48 from returning counterclockwise. hook lever 38 via pin 38b
clockwise to release the hook 38a at its tip from the crank lever 26. As a result, the crank lever 26 is rotated counterclockwise by the spring 30, the restriction on the shaft 29 of the second planetary lever 28 is released, and the second planetary gear 28 meshes with the first human-powered gear 47 (the state shown in FIG. 7). ). Therefore, the rotation of the motor is controlled by the first manual gear 47.
is transmitted to the fork gear 45 via the intermediate gear 46, and rotates the rewinding fork 54 shown in FIG. 4 in the rewinding direction.

In this state where the back cover is half open, the fork 54 has already been lowered and engaged with the cartridge P, so that rewinding of the film leader section F is started. The state at this time is also shown in FIG. In this state, the contact piece 14 of the film leading edge detection switch is in contact with the film leader section F and cannot contact the film leading edge switch 13 yet. As the rewinding of the film leader section F progresses and the tip of the film leader section F passes the position of the contact piece 14 of the film leading edge detection switch, and the pulling operation of the film leader section into the camera is completed, one of the film leading edge detection switches contact piece 1
4 contacts the other contact piece 13 of the film leading edge detection switch. As a result, the film leading edge detection switch 104 shown in FIG. give a signal to stop rotating. On the other hand, the ON signal of the film leading edge detection switch 104 is also input to the winding control circuit 112, and the winding control circuit 112 outputs a signal to the motor drive circuit 110 to rotate the motor 109 in the winding direction.

As a result, the motor 109 rotates in the reverse direction, and the pinion gear 17 in FIG. 7 starts rotating counterclockwise. The counterclockwise rotation of the pinion gear 17 causes the second sun gear 24 to rotate clockwise, and the second planetary gear 28 meshes with the gear 7a.
The feeding roller 7 in FIG. 2 rotates so as to feed the film toward the aperture 8b. Further, since the sun gear 21 also rotates counterclockwise, the spool gear 10a rotates via the intermediate gear 58, and the spool 10 in FIG. 2 also rotates in the film winding direction.

The clockwise rotation of the second sun gear 24 causes the intermediate gear 31 to
The cam gear 32 also rotates clockwise via the cam 32b.
moves to a position where the locking lever 34 is released from the arm 34b. As a result, the locking lever 34 is rotated counterclockwise by the spring 36, and the claw 34a is separated from the protrusion 4e of the back cover 4. Therefore, the back cover 4 becomes free, the pin 4d is pushed by the absorption spring 53, and the back cover 4 rotates to the fully closed position.

That is, the back cover 4 is completely closed by the reverse rotation of the motor. This state is shown in FIGS. 9 and 10. When the back cover 4 is fully closed, the light blocking portion 4b of the back cover 4 engages with the exterior material 1 to prevent light from leaking into the camera, as shown in FIG. 1O.

Further, the film pressure contact roller 15 and the feeding roller 7 rotate while sandwiching the film leader section F, and the film is transferred to the aperture 8b.
Send it in the direction of. When the film leader section F passes through the aperture 8b, a glass plate 59 is attached to the aperture section 8b.
Because of this, the film leader section F does not get caught in the aperture section 8b (it can reach the spool chamber 8a.
The film leader portion F is wound around the spool 10 by the film guide roller 9. In response to the movement of the film, the feed switch 108 shown in FIG. 11 is repeatedly turned on and off, and the winding control circuit 112 counts the number of times the feed switch 108 is turned on and off, and the predetermined amount of empty feeding is completed. Then, the hoisting control circuit 112
A signal is given to the motor drive circuit 110 to stop the motor 109, and the preparation for photographing is completed.

Thereafter, when the release button 3 shown in FIG. 1 is pressed, the release switch 101 shown in FIG. 11 is closed, and the exposure control circuit 102 performs an exposure operation.

When the exposure operation is completed, a signal to start winding one frame is sent from the exposure control circuit 102 to the winding control circuit 112.
0 to rotate the motor 109 in the winding direction. The winding control circuit counts the number of times the feed switch 108 is turned on and off, and when it detects that the film has been fed by one frame, it gives a signal to the motor drive circuit 110 to stop the motor 109. As a result, the motor 109 is stopped, and the winding operation for one frame of the film is completed.

As described above, the exposure operation and the one-frame winding operation of the film are repeated, and when the film is wound to the end position,
The tension detection circuit 111 detects the tension at the end position of the film, and transmits the film to the winding control circuit 11 via the inverter 106.
A signal is output to 2. When the hoisting control circuit 112 receives this signal, the hoisting control circuit 112 causes the motor drive circuit 110 to control the motor 10.
A signal is output to stop the rotation of 9 in the winding direction. On the other hand, the tension detection signal from the tension detection circuit 107 is also input to the rewind control circuit 111, and the rewind control circuit 111 receives this signal and drives the motor drive circuit 110.
A signal is given to rotate the motor 109 in the rewinding direction. As a result, the motor 109 rotates normally again, and the pinion gear 17 in FIG. 9 rotates clockwise. Since the crank lever 26 is in the retracted state, the second planetary gear 28 meshes with the first input gear 47 due to the clockwise rotation of the pinion gear 17. Therefore, the rotation of the motor 109 is again transmitted to the rewinding fork 54 shown in FIG. 4, and rewinding of the film is started. At this time, the locking lever <-34 moves, but this does not affect anything else. When the film stand switch 113 detects that the film has been rewound inside the cartridge, the winding control circuit 111 outputs a signal to the motor drive circuit 110 to reverse the motor 109 for a short period of time, resulting in the state shown in FIG. Make it. In this state, when the oven button 6 is pressed, the tension lever 42 is rotated counterclockwise by the arm 42b. As a result, the claw 42a and the charge disk 4
8 is disengaged from the side surface 48d of the large diameter portion 48b, and the charge disk 48 is rotated counterclockwise by the spring 52, so that the pin 4d is pushed by the charge disk 48 and the back cover 4 is moved as shown in FIG. It rotates approximately 90 degrees and opens, allowing the cartridge P to be taken out. Further, when the back cover 4 is opened, the pin 4C engages with the arm 26a of the crank lever 26 and returns the crank lever 26 to the initial position shown in FIG.
arm 26b is set again by hook lever 38. In this state, the locking lever 34 is connected to the cam gear 32.
Since the engagement with the cam 32b is disengaged, the claw 34 at the tip
a is in a state where it does not engage with the protrusion 4e of the back cover 4. Therefore, after taking out the cartridge P to the outside of the camera,
When you close it by hand, the back cover 4 is closed by interlocking the charge disc 48, and the claw 42a of the tension lever 42 engages the charge disc 4.
8, and the back cover 4 is manually set in the closed state. Note that when the back cover 4 is manually closed in this manner, the start switch 103 is closed, but when the cartridge P is taken out, the cartridge detection switch 114 does not detect loading of the cartridge. Therefore, the return control circuit 111 does not drive the motor. Also, in conjunction with this manual back cover closing operation, the intermediate gears 49, 50°, second human gear 51, etc. rotate simultaneously, but since the second planetary gear 28 is disengaged, it does not become a load.

In the above embodiment, the opening operation of the back cover 4 is performed by the urging force of the return spring 52, but this may be performed by the driving force of a motor. In that case, as shown in FIG. 12, the return spring 52 is eliminated in the configuration shown in FIG. Lock lever to hold
Add 201. Also, as shown in Figure 13, the 11th
In the circuit shown in the figure, even if the film stand switch 113 detects that the film has been rewound into the cartridge, the motor 109
An open switch 202 is added to prevent the motor from reversing and to rotate the motor in the winding direction in response to the press of the oven button 6.

In the above configuration, when the oven button 6 is pressed after film rewinding is completed, the lock lever 201 jumps into the operating range of the second planetary lever in conjunction with the oven button 6. At the same time, the tension lever 4 is tightened by the oven button 6.
2 is pressed and rotates counterclockwise to release the tension of the charge disk 48. On the other hand, in response to the press of the oven button 6, the oven switch 202 is turned on, whereby the winding control circuit 112 outputs a signal to the motor drive circuit 110 to rotate the motor 109 in the winding direction. Therefore, the second planetary gear 28 attempts to move in the direction of the gear 7a, but is prevented from moving by the lock lever 201, and the revolution is stopped in a state in which it is engaged with the second human-powered gear 51. In this state, the motor rotates in the hoisting direction, so the second planetary gear 28 causes the first manual gear 51. The charge gear 48a rotates counterclockwise via the intermediate gears 49 and 50, and the back cover 4
The pin 4d is attached to the side surface 4 of the large diameter portion 48b of the charge disk 48.
8d and rotates counterclockwise to open the back cover 4.

Incidentally, when it is desired to automatically stop the opening operation of the back cover 4, a discrimination switch that responds to the operation of the crank lever 26 or the like may be provided, and the motor may be stopped by a signal from this discrimination switch.

Further, in the above embodiment, the closing operation of the back cover is performed by the driving force of the motor, and the opening operation is performed by the urging force of the spring, but by reversing this, the closing operation of the back cover is performed by the urging force of the spring. The opening/operation may be performed by the driving force of a motor.

Furthermore, in the embodiment described above, the motor also serves as a film feeding motor to drive the back cover, but a separate motor may be used instead.

Furthermore, in the embodiment described above, when the back cover 4 is closed electrically or manually, the back cover 4 is not directly locked, and the charge disc 4 is closed.
8 is locked, and the back cover 4 is closed via the absorption spring 53. However, in order to lock the back cover 4 more reliably, a means for directly locking the back cover is provided, and this is attached to the oven. It may also be released in conjunction with button 6.

Furthermore, by reversing the arrangement of the cartridge chamber and spool chamber of the above embodiment, the roundness of the protrusion of the back cover can also be used as a finger rest.

Further, in the embodiment described above, the cartridge detection switch 114 prevents the back cover 4 from being electrically driven when no cartridge is loaded in the cartridge chamber.
This may be done so that the back cover 4 is always electrically driven regardless of whether or not a cartridge is loaded (that is, regardless of the state of the cartridge detection switch 114).

〔Effect of the invention〕

As explained above, according to the present invention, in a camera in which the cartridge chamber is closed with the film leader remaining outside the camera, the leader is pulled into the camera and wound around the spool. , comprising a lid for closing the patrone chamber, an electric drive means for driving the mirror lid to close, and a control means for operating the electric drive means in response to the lid being moved from an open state to a closing direction. Since it is a camera, the lid is electrically driven to close, and the drive is started by operating the mirror lid in the closing direction, which is an easy-to-understand method related to the closing operation of the mirror lid. The operability is further improved, and it is also extremely effective in terms of space and cost, as there is no need to provide a special operation member such as a start button to start the electric closing drive. It is.

[Brief explanation of drawings]

1 is an external perspective view of a camera according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the camera of FIG. 1, FIG. 3 is a plan view showing the gear configuration of the camera of FIG. 1, and FIG.
The figure is a vertical cross-sectional view of the cartridge chamber and surrounding area of the camera shown in Figure 1. Figure 5 is a perspective view showing the configuration of the back cover of the camera shown in Figure 1. Figure 6 is a closing drive of the back cover of the camera shown in Figure 1. Fig. 7 is a plan view showing the gear state of the camera shown in Fig. 1 during empty rewinding of the film leader section; Fig. 8 is a plan view showing the gear state of the camera shown in Fig. 1. Figure 7 is a cross-sectional view of the state shown in Figure 1. Figure 9 is a plan view showing the gear state of the camera shown in Figure 1 when the back cover is fully closed. Figure 10 is Figure 9 of the camera shown in Figure 1. 11 is a block diagram showing the control circuit of the camera in FIG. 1, FIG. 12 is a plan view of a gear configuration showing a modified embodiment of the camera in FIG. 1, and FIG. 13 is a block diagram showing the control circuit of the camera in FIG. A circuit block diagram of a modified embodiment corresponding to FIG. 12,

Claims (1)

[Claims] In a camera in which the film leader is pulled into the camera and wound onto a spool after the cartridge chamber is closed with the film leader remaining outside the camera,
It is characterized by comprising an electric drive means for driving the lid for closing the cartridge chamber, and a control means for operating the electric drive means in response to the lid being moved from an open state to a closing direction. A simple loading camera.