JPS63281147A - Simple loading camera - Google Patents

Abstract

PURPOSE:To dispense with a shading material by providing a cover which closes a cartridge room a detection means for detecting the completion of the drawing of the leader part into a camera and a control means for making the cover in a fully-enclosed state by answering that the detection means detects the completion of drawing. CONSTITUTION:The cover 4 which closes the cartridge room 8c, the detection means for detecting the completion of the drawing of the leader part F of a film into the camera and the control means for making the cover 4 in the fully-enclosed state by answering that the detection means detects the completion of drawing re provided in a camera where the leader part F of the 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. Thus, it is unnecessary that the shading material is installed in an approach into the camera for the leader part F of the film and the trouble in durability and load, etc., caused by the shading material can be solved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a camera, and in particular, to a camera, in which the film leader is left outside the camera after the cartridge chamber is closed.
The present invention relates to an improvement of a camera in which the leader section is automatically drawn into the camera and wound around 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 filed a patent application in 1986 for a new camera with simple film loading that allows film loading to be carried out very easily.
It is proposed by No. 8928 etc.

In the above-mentioned novel film easy loading type camera proposed by the present applicant, after the cartridge is attached to the cartridge chamber when loading film, the user leaves the film leader protruding from the cartridge outside of the camera. This is a camera in which 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 novel camera proposed by the present applicant, when the user closes the lid of the cartridge chamber with the film leader part protruding from the cartridge left outside the camera when loading film, the film leader part is exposed outside the camera. ing.

After the film leader is automatically drawn into the camera, empty winding is performed to wind the film leader around the spool, completing the loading of the film.

The camera already proposed by the present applicant, which has the above-mentioned functions, has an extremely simple film loading operation and is extremely easy to use compared to conventional cameras. was also left behind.

In other words, in the above-mentioned camera, it is necessary to block light from the entrance of the film leader section left outside the camera to prevent it from leaking into the camera. If a light shielding material such as maltbrene is placed, there are durability problems such as the light shielding material peeling off when the film slides, and there is also the disadvantage that the light shielding material becomes a load when the film leader section is drawn into the camera. Ta.

[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 leader portion of the film remaining outside the camera, the leader portion is pulled into the camera and wound around the spool. The camera includes a lid for closing the cartridge chamber, a detection means for detecting completion of retraction of the reader section into the camera, and a detection means for completely closing the lid in response to the detection means detecting completion of retraction of the reader section into the camera. In the camera of the above type, there is no need to provide a light-shielding material at the entrance of the film leader section into the camera, and the disadvantages such as durability and load caused by the light-shielding material are eliminated. The aim is to provide a simple loading camera.

[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. 1 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 patrone chamber, 5 is the start button,
6 is an open button, and 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 l.
Together, they form a patrone chamber 8C. Reference numeral 9 denotes a film guide roller, which is pressed against the outer periphery of the spool IO 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 tip detection switch, and two pieces of the same shape are fixed to the exterior material 1 and 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 photographic 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 10 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. Reference numeral 38 denotes a hook lever, which has a hook portion 38a at its tip that can be engaged with the arm 26b of the crank lever 26, 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, and 4
2c, which is rotatably supported by a shaft 43 and biased clockwise by a spring 44. In addition, the tension lever 42
The arm 42c is engageable with the pin 38b of the hook lever 38. Reference numeral 6 denotes the oven button shown in FIG. 1, which is slidably guided by the exterior member 1, one end protrudes to the outside of the camera, and the other end engages with the tension lever arm 42b. 45
is 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, the first input 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, and this pin 4d is connected to the large diameter portion 48b of the charge disk 48.
can be engaged with the side surface 48d. Reference numeral 53 denotes an absorption spring, which is hung between the charge disc pin 48c and the back cover pin 4d, and normally the charge disc 48 and the back cover 4 rotate integrally via the absorption spring 53.

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 has a trone presser projection 4a, pins 4d,
c, one contact piece 14 of a film tip detection switch consisting of two conductive contact pieces, which are integrally formed with a protrusion 4e, a light shielding part 4b, a cartridge shaft relief 4f, and upper and lower rotation holes 4g and 4h, respectively. A film pressure roller 15 is attached. Reference numeral 13 designates the other contact piece of the above-mentioned film tip detection switch attached to the exterior material l.

FIG. 11 is a block diagram showing a 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 by pressing the start button shown in FIG. 1; 104 is a contact piece 1 shown in FIG. 2;
3 and 14. When the film leader protrudes outside the camera, the film is interposed between the contact pieces 13 and 14, and the film leading edge detection switch 104 is turned off. When the reader 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;
110 is a known motor drive circuit that controls the forward and reverse rotation of the motor 109; 111 is a known rewind control circuit that controls film rewinding; and 111 is a known rewind control circuit that controls film rewinding. The switch is closed or the tension detection circuit 1
07 outputs a signal to the motor drive circuit 110 to perform a rewinding operation in response to the detection of tension. 1
Reference numeral 12 denotes a known winding control circuit for controlling film winding, and when a film leading edge detection switch is turned on or 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 the film is fed a specified number of times in response to the number of times the feed switch 108 is turned on and off. Increase the amount or one piece of Meng Chun.

Reference numeral 113 is a film stand switch that detects that the rewinding of the film into the cartridge has been completed.

Next, the operation of the above configuration will be explained with reference to FIGS. 1 to 11. Note that since FIGS. 6 to 10 are used to explain the operating state of the above structure, the same reference numerals are given to corresponding parts as 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.

In this state, when the start button 5 is pressed, the start switch 103 shown in FIG. 11 is closed, and at this time, as shown in FIG.
In the figure, since the film leading edge detection switch 104 is off and this is input to the rewind control circuit 111 via the inverter 105, the rewind control circuit 111 causes the motor drive circuit 110 to rotate the motor 109 in the film rewind direction. Give a signal like so. This causes the motor 109
rotates in the normal direction, and the pinion gear 17 starts rotating clockwise in FIG. 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). Further, the second sun gear 24 rotates counterclockwise via the intermediate gears 60 and 61, and the second planetary lever 25 also rotates counterclockwise, but the shaft 29
It hits the locking part 26c of 6 and stops. In this state, the second planetary gear 28 meshes with the second human-powered upper gear 51a, so that the charge gear 48a is rotated clockwise from the second human-powered lower gear 51 via the intermediate gears 49 and 50. When the charge disc 48 rotates clockwise against the spring 52 as the charge gear 48a rotates, the bottle 4d of the back cover 4 is pushed by the absorption spring 53, causing the back cover 4 to rotate clockwise as well. 4
begins to rotate in the closing direction concentrically with the rotation center of the film rewind fork. At this time, even if the film outlet P2 of the cartridge P floats outward as shown in FIG.
As the cartridge rotates in the closing direction, the cartridge P is pushed in by the cartridge holding projection 4a of the back cover 4 so that the direction 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 and rotates the locking lever 34 clockwise by a certain angle, as shown in FIG. Stop at. In this state, the claw 34a of the locking lever can engage with the protrusion 4e of the back cover 4, so 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 partially opened. stop in the 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 tension lever 42 falls from the large diameter portion 48b of the charge disk 48, causing a large The side surface 48d of the diameter portion 48b is locked to prevent the charging disk 48 from returning counterclockwise, and the arm 42c is rotated clockwise due to the fall of the tensioning lever 42 through the pin 38b. Then, the hook lever 38 is rotated 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 input gear 47 (the seventh
state). Therefore, the rotation of the motor is transmitted from the first input gear 47 to the fork gear 45 via the intermediate gear 46.
The rewinding fork 54 shown in FIG. 4 is rotated 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 yet come into contact with the film leading edge switch 13. 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 The contact piece 14 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. 11 is turned on, and this signal is transmitted to the inverter 1.
05 to the rewind control circuit 111, and the rewind control circuit 111 inputs the motor 1 to the motor drive circuit 110.
A signal is given to stop the rotation of 09 in the rewinding direction. 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 second sun gear 24 is rotated by the counterclockwise rotation of the pinion gear 17.
rotates clockwise, the second planetary gear 28 meshes with the gear 7a, and the feed roller 7 in FIG.
It rotates so as to send it out in the b direction. Also, sun gear 21
Since the rotation is also 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. Due to the clockwise rotation of the second sun gear 24, the cam gear 32 also rotates clockwise via the intermediate gear 31, and the cam 32b is connected to the arm 34b of the locking lever 34.
Move to the position separated from. As a result, the locking lever 3
4 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, and the pin 4d is pushed by the absorption spring 53, causing the back cover 4 to become free.
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 Figure 9.

This is shown in FIG. When the back cover 4 is fully closed, the light shielding part 4b of the back cover 4 engages with the exterior material 1, as shown in FIG. 10, to prevent light from leaking into the camera. Further, the film pressing roller 15 and the feeding roller 7 rotate while sandwiching the film leader portion F, and feed the film toward the aperture 8b. When the film leader part F passes through the aperture 8b, since the aperture part 8b has the glass plate 59, the film leader part F does not get caught in the aperture part 8b (it can reach the spool chamber 8a. is wound around the spool 10 by the film guide roller 9.In response to the movement of the film, the first
When the feeding switch 108 shown in Figure 1 is repeatedly turned on and off, the winding control circuit 112 counts the number of times the feeding switch 108 is turned on and off, and the specified amount of empty feeding is completed.)
The hoisting control circuit 112 provides a signal to the motor drive circuit 110 to stop the motor 109 and
stops and preparations for shooting are 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 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 particularly 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 open 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 48
The large diameter portion 48b of the pin 4 is disengaged from the side surface 48d, and the charge disk 48 is rotated counterclockwise by the spring 52.
d is pushed by the charge disk 48, the back cover 4 is rotated approximately 90 degrees and opened as shown in FIG. 3, and the cartridge P can 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 moves the crank lever 26 to the third position.
Since the crank lever 26 is returned to the initial position shown in the figure, the arm 26b of the crank lever 26 is set again by the hook lever 38. In this state, the locking lever 34 is disengaged from the cam 32b of the cam gear 32, so the claw 34a at the tip is disengaged.
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 the back cover 4 is closed by hand, the charge disc 48 is interlocked and the back cover 4 is closed, and the claw 42a of the tension lever 42 is moved against the charge disc 48.
The back cover 4 is manually set in the closed state by locking the side surface 48c of the large diameter portion 48b. At this time, intermediate gear 49
゜50. The second manual gear 51 etc. rotate at the same time, but the second
Since the planetary gear 28 is disengaged, it does not become a load.

In the embodiment described above, the screw 52 for returning the opening operation of the back cover 4 is
Although this is done by the urging force of the motor, it may be done by the driving force of the motor. In that case, as shown in FIG. 12, the return spring 52 is eliminated in the configuration shown in FIG. Add a lock lever 201 to hold. Also, as shown in Figure 13, the first
In the circuit shown in Figure 1, even if the film bud switch 113 detects that the film has been rewound into the cartridge, the motor 10
An oven switch 202 is added to prevent the motor from rotating in the winding direction in response to pressing the oven button 6.

In the above configuration, when the rewinding of the film is completed and the oven button 6 is pressed, the lock lever 201 jumps into the operating range of the second planetary lens in conjunction with the open button 6. At the same time, the tensioning lever 42 is pushed by the oven button 6 and rotates counterclockwise, releasing the tensioning of the charging disk 48. On the other hand, in response to the press of the oven button 6, the open 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. For this reason,
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 second
The revolution is stopped in a state where it is meshed with the manual 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 gear 49.50, and the bottle 4d of the back cover 4 is pushed by the side surface 48d of the large diameter portion 48b of the charge disc 48 and rotates counterclockwise. The lid 4 will be opened.

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.

〔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. , a lid for closing the cartridge chamber, a detection means for detecting completion of retraction of the reader section into the camera, and a fully closed state of the lid in response to the detection means detecting completion of the retraction. Since the camera is equipped with a control means, it is possible to eliminate the need for providing a light shielding material at the entrance of the film leader section into the camera in the above-mentioned type of camera.
This makes it possible to eliminate inconveniences such as durability and load caused by the light shielding material.

[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 in Figure 1, Figure 5 is a perspective view showing the configuration of the back cover of the camera in Figure 1, and Figure 6 is when the start button of the camera in Figure 1 is pressed. 7 is a plan view showing the gear state of the film leader section of the camera shown in FIG. 1 during empty rewinding. FIG. Fig. 9 is a plan view showing the gear state of the camera shown in Fig. 1 when the back cover is fully closed, and Fig. 1O shows the state of the camera shown in Fig. 1 in the state shown in Fig. 9. 11 is a block diagram showing the control circuit of the camera shown in FIG. 1, FIG. 12 is a plan view of a gear configuration showing a modified embodiment of the camera shown in FIG. 1, and FIG. 13 is a block diagram showing the control circuit of the camera shown in FIG. A circuit block diagram of a corresponding variant embodiment,

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,
a lid for closing the cartridge chamber; a detection means for detecting completion of retraction of the reader section into the camera; and control for fully closing the lid in response to the detection means detecting completion of the retraction. A simple loading camera characterized by comprising means.