JPS63301932A - Camera - Google Patents

Abstract

PURPOSE:To prevent a motor from being harmed even if excessive external force is given to a rear cover by providing a means for locking the rear cover in a half-opening position, an automatic lock releasing means and an automatic closing means for moving the rear cover released from lock from the half- opening position to a complete closing position. CONSTITUTION:If the rear cover 1 is pushed as a film leader part exposed from a cartridge P is left outside a camera after loading the cartridge P, a switch 27 switches ON/OFF in an extremely short time which the actuation of the pawl 1a of the inside of the rear cover 1 and a locking pawl 4. And a rewinding control circuit 202 is actuated to rotate a motor 30. When a gear 31 is rotated clockwise by the motor 30, the locking pawl 4 starts to move right upward and the rear cover 1 is closed because the pawl 1a is pulled by the locking pawl 4. Thus, the locking means is integrated with the lock releasing means so as to be used as the automatic rear cover closing means and since the means for locking the rear cover 1 is not directly linked with the motor 30, there is not possibility of harming the motor 30 even if the excessive external force is given to the rear cover 1 in the half-opening state of the rear cover.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a camera having a structure in which the back cover automatically closes from a half-open position to a fully closed position, and particularly relates to a camera in which a cartridge containing a roll film is inserted into the camera. This relates to a type of camera in which film loading is completed only by manually closing the back cover to a half-open position.

[Background of the Invention] It is well known that in cameras using roll film, operations when loading the film are complicated. Therefore, in recent years, many proposals have been made regarding simple film loading to facilitate film loading, and the present applicant also proposes the following:
We have filed a patent application for a camera that can be loaded with film simply by inserting the cartridge into the camera and without any other operations.

In the camera, which is the prior invention of the present applicant, the back cover is fully closed from the fully open position to the fully closed position (using the power of the film feeding motor housed in the camera). This camera not only makes it easy to load film, but also provides the convenience of not having to close the back cover and operate it, but this camera also has the following features: There were some problems.

(i) In the camera of the applicant's earlier invention, the back cover was rigidly connected to the film feeding motor via a gear mechanism, or if an excessive external force was applied to the back cover, the motor There was a risk of damage.

(ii) Since it is necessary to keep the back cover in an unlocked state while rewinding the part of the film leader exposed outside the camera into the camera when the cartridge is loaded, the back cover must be in an unlocked state. Either the camera should be provided with a means to detect whether or not it is, or the camera was not provided with it.

(iii) Since the above camera is equipped with a detection switch on the inner surface of the back cover to detect the tip of a part of the film leader, it is possible to rewind the part of the film leader outside the camera into the camera when the back cover is half open. If the back cover is completely used during the operation, it becomes difficult to detect the tip of a part of the film leader, and as a result, the tip of a part of the film leader may also be caught in the cartridge, or the film leader may There was a risk that the unwinding control to the spool, which should be performed after unwinding the part, could not be performed.

[Object of the Invention] An object of the present invention is to solve the above problems and provide an improved camera.

[Summary of the Invention] A camera according to the present invention includes a locking means for locking the back cover in a half-open position, and an unlocking means for automatically unlocking the back cover after the back cover is locked by the locking means.
The present invention is characterized by comprising an automatic closing means for automatically moving the back cover from the half-open position unlocked by the lock release means to the fully closed position by non-manual operation. In the camera of the present invention, after the back cover is locked in the half-open position, it is automatically fully closed.
That is, even if the back cover tries to open in the entire circumferential direction during the winding process of a part of the film leader after the cartridge is loaded, the back cover will not open, so the above problem (mountain) is solved. Further, since the back cover is locked in the half-open position, the above problem (i) is also solved.

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

Fig. 1 shows the camera of this embodiment in a state before the back cover 1 is manually closed to the half-open position after loading the cartridge and a part of the film leader is rewound, and Fig. 2 shows the state in Fig. 1. Figure 3 is a diagram showing the state before rewinding of a part of the film leader into the camera begins after the film leader is in the state shown in Figures 1 and 2. Figure 4 is a diagram showing the state of the structural parts connected to the mechanism shown in Figure 4. Figure 4 is a diagram showing a state in which a part of the film leader has been rewound inside the camera after the state shown in Figure 2. Figure 6 shows the state in which the back cover is automatically closed after the state shown in the figure and before the film is sent to the spool chamber. Figure 6 is the state of the structural part shown in Figure 3 when the back cover is closed. FIG. 7 is a perspective view of the rear side of the camera of this embodiment when the back M is open.

The camera of this embodiment, which incorporates the mechanisms shown in FIGS. 1 to 6, has a small back cover 1 that opens only the cartridge chamber, as shown in FIG. 7, and a spool of the camera. The chamber, aperture, etc. are covered by the rear cover 3, and the structure is such that the spool chamber and aperture cannot be exposed.

In addition, the camera of this embodiment has a back cover 1 when loading film.
After opening the cartridge as shown in Figure 7 and inserting the cartridge into the cartridge chamber, the spine M1 is configured so that the film loading can be completed by lightly pressing the spine M1 as shown in Figure 7. , two wooden claws 1a and 1b protruding toward the camera are formed at both upper and lower ends of its inner surface, and the back cover 1 is rotatably pivoted at one end to a bin 2 protruding from the camera body (not shown). has been done. As shown in FIGS. 1 and 3, the claws 1a and 1b are composed of a handle of uniform width and a head formed at the tip of the handle,
The rear end of the head is wider than the width of the handle and projects laterally than the handle. The head has a tapered planar shape, and the tip surface is an engagement surface that engages with a locking pawl, which will be described later, and the right side surface of the head is an inclined surface of the tip of the locking pawl. It is a slope that you can slide along. The claws 1a and 1b are members that constitute a locking means for the back cover 1 together with the locking claws described below, and both are configured to have approximately the same shape, or the claws 1a and 1b are configured to have the same shape as the locking claws described later. The wooden locking claws are configured in different shapes.

As shown in FIG. 1, a roller 40 is attached to the inner surface of the end opposite to the pivoting end of the back cover 1 for contacting a portion F of the film feeder, and a protrusion on the edge of the opening of the rear cover 3 is attached. 3b
A vertical groove 1d that fits into the opening edge of the back cover 3 is formed, and a vertical protrusion 1c that fits into a vertical groove 3a formed on the outer surface of the opening edge of the back cover 3 is formed on the back cover 1. It is formed on the inner surface of the end.

Inside the camera body, there is a claw 1 as shown in Figures 1 to 6.
The locking claws 4 and 24 are provided to lock the gears 5 and 1b fixed to the common shaft 5b, respectively. They are each pivotally mounted on the disc 23. That is, the gear 5 has a pin 5a protruding from a position eccentric to the shaft 5b, and the locking claw 4
is loosely fitted into the bottle 5a at one end thereof, and a locking pawl 24 is provided on the bottle 23a protruding from an eccentric position on the disc 23.
One end is pivoted.

The locking pawl 4 has a hook portion 4a at its tip that engages with the rear end surface of the head of the pawl 1a, and a recess 4C into which the head of the pawl 1a enters. It has a vertically bent portion 4b. The locking pawl 4 is always pulled to the left by the spring 6 as shown in FIG. 1, and is stopped at a position where it abuts against the stopper 7 when the back cover is half open as shown in FIG.

The other locking claw 24, which is pivotally mounted on the bottle 23a on the disc 23, has a different shape from the locking claw 4, and the claw 4 is different from the claw 1b of the back cover 1. are formed with different dimensions. That is, this claw 24 has a hook portion 24 at the tip.
recessed portion 24b that includes a and continues to the hook portion 24a.
However, since the recess 24b is significantly larger than the length of the head of the claw 1b, in the half-opened state of the back cover shown in FIGS. 1 to 4, the rear end surface of the head of the claw 1b and the hook portion 24a are Only the tip end surface of the claw 1b is in contact with the end surface 24c of the recess 24b.
It is in relative slidable contact with. In addition, the locking claw 24
Since the planar shape of the pivot end side is fan-shaped, when the locking pawl 24 is in contact with the stopper 26 as shown in FIG. 3, the hook portion 24a is located far away from the head of the pawl 1b. It has stopped. The locking pawl 24 is also constantly pulled to the left by the spring 25, as shown in FIG.

The gear and disc 23 serving as a means for overcoming the force of the springs 6 and 25 to move the locking claws 4 and 24 in the opposite direction, as well as the shaft 5b fixing both, prevent the claws 1a and 1b from locking. It constitutes a part of the lock release means for releasing the lock.

A cam 8a is integrally fixed to a gear 8 that is always meshed with the gear 5, and the gear 8 and the cam 8a are fixed to the same shaft 9. A spring 28 is fitted to the shaft 9, which always urges the gear 8 and the cam 8a in the counterclockwise direction in FIG.
One end of the spring 28 is locked to a pin 29 protruding from the camera body, and the other end of the spring is locked to a pin 8d protruding from the cam 8a.
It is locked to.

A recess 8b and a protrusion 8c are formed on the outer periphery of the cam 8a at positions approximately 180° apart from each other in the center angle, and in the state shown in FIG. 8
C is engaged to prevent the rotation of the cam 8a and gear 8.

As shown in the figure, the cam locking member 10 has first and second arms 10a and 10b that are substantially perpendicular to each other, and is rotatably loosely fitted to the fixed shaft 11 at the bases of both arms. ,
The spring hook is biased counterclockwise about the fixed shaft 11 by a spring 12 that is engaged with the portion 10c.

A planetary gear mechanism consisting of a sun gear 13, a planetary lever 15, and a planetary gear 14 is provided as a device for rotating the gear 5 at a predetermined time.
Gear 38 at the end of the gear train connected to Yu 30
are always engaged. In addition to gear 5, the planetary gear 14 is
The planetary lever 1 is moved so that it sequentially engages the film rewinding gear 16 and the film feeding gear 20 in a predetermined sequence.
5 and can revolve around the sun gear 13.

A pulley 16a is integrally formed with the film rewinding gear 16, and the rotation of the pulley 16a is controlled by the endless belt 1.
8 to a pulley 17 coaxial with the fork shaft, and when the pulley 17 is rotated, the shaft in the cartridge chamber is rotated in the film rewinding direction via the fork shaft (not shown).

The film feeding gear 20 is formed integrally with the film feeding roller 19, and when the gear 20 meshes with the planetary gear 14 and is rotated by the planetary gear 14, the film feeding roller 19 is rotated.

The gear 38 is always meshed with a sun gear 34 of another planetary gear mechanism, and the sun gear 34 has gears 31 to 3.
The power of the motor 30 is transmitted through the motor 3. In this embodiment, the motor 30 is a film feeding motor.

A spool gear 37 meshes with the planet gear 35 of the planetary gear mechanism, and the spool gear 37 is formed integrally with the spool.

The planetary gear mechanism includes the sun gear 34 and the planetary lever 36.
It also includes the planetary gear 35, and is provided as a switching mechanism for transmitting the power generated by the dryer 30 to the spool during film winding.

FIG. 8 is a schematic diagram of a part of the control device installed in the camera of this embodiment.

In FIG. 8, switch 27 is the switch shown in FIGS. 1 and 2, and FIG. 205 is a switch (not shown) that is turned off when the camera reaches the position 40; 205 is a switch that is closed in response to the operation of the release button (FIG. 7) 39 provided in the camera of this embodiment; 204 is a supply for the dryer 30; Motor drive circuit that turns the current on and off and switches the direction of the current,
202 is a rewind control circuit that applies a control signal for causing the motor drive circuit 204 to rewind the film;
203 is a winding control circuit that applies a control signal for winding the film to the motor drive circuit 204;
Reference numeral 208 denotes a tension detection circuit that detects a tension state between the film or cartridge and the spool after all frames of the film have been exposed, and generates an output signal.
6 is an exposure control circuit that operates a shutter mechanism (not shown) in response to the closing of the switch 205, and generates an output signal to the winding control circuit 203 in response to completion of exposure; Feeding switches 207 and 209, which are turned on and off in proportion to the amount of film being fed toward the spool, are inverter circuits that generate output signals of opposite polarity to the human input signal. Note that a counter is provided in the winding control circuit 203 to count pulses generated by the on/off operation of the feed switch 54.

Next, the operation of each part in the camera of this embodiment having the above-mentioned configuration will be explained.

When loading film, first fully open the back cover 1 as shown in Fig. 7, then load the cartridge into the cartridge chamber inside the camera, leaving the part of the film leader exposed from the cartridge P outside the camera. Hold it still and press the back cover 1 lightly. Then, the tip of the claw 1a protruding from the inner surface of the back cover 1 presses the inclined surface of the tip of the hook portion 4a of the locking claw 4 inside the camera and slides along the inclined surface, so that the claw 1a is affected by the force of the spring 6. The user overcomes this and pushes the locking pawl 4 to the right, and the locking pawl 4 is temporarily separated from the stopper 7 and moved counterclockwise around the bottle 5a. As a result, the vertical bent portion 4b protruding from the locking pawl 4 presses the contact piece of the switch 27, so that the switch 27 is turned on. However, when the head of the pawl 1a passes through the inclined surface of the hook portion 4a of the locking pawl 4 and reaches the opening of the recess 4C of the pawl 4, as shown in FIG. Since the head of the pawl 1a jumps into the recess 4C of the locking pawl 4, the force that was pushing the pawl 4 away from the stopper 7 disappears, and the pawl 4 is moved to the left by the force of the spring 6. At the same time, it is pulled back to the position where it contacts the stopper 7 again. Therefore, once the switch 27 is turned on by contacting the vertically bent portion 4b of the locking pawl 4, the locking pawl 4 returns to its original position and the vertically bent portion 4b and the contact piece of the switch 27 are connected to each other. Due to lack of contact, he was turned off again.

By turning the switch 27 on and off during the short period of time it is turned in this way, one pulse signal (one-shot pulse) is input from the switch 27 to the rewind control circuit 202 in FIG. 8, and the rewind control circuit is activated. 202 is activated, and a control signal is sent from the rewind control circuit 202 to the motor drive circuit 204 instructing the motor 30 to rotate in the film rewind direction. Therefore, the motor drive circuit 204 drives the motor 30 to the gear 31 in FIG.
is rotated in the direction of counterclockwise rotation, and as a result,
Sun gear 34 of the planetary gear mechanism via gears 32 and 33
is rotated clockwise, the planetary lever 36 is also rotated clockwise about the axis of the sun gear 34, the planetary gear 35 is released from the meshing state with the Subur gear 37 and moves to the left, and the planetary lever 36 is rotated clockwise. It stops at the position where it comes into contact with the stop bar 21 shown in FIG. On the other hand, sun gear 3
4 is rotated clockwise, the sun gear 13 of the other planetary gear mechanism is rotated clockwise in FIG. be moved. Therefore, the planetary gear 14, which had been meshing with the gear up to that point, disengages while meshing with the gear 5 and moves toward the rewinding gear 16, and then meshes with the gear 16 as shown in FIG.

As a result, the rotation of the motor 30 is caused by gears 32 to 34 and gear 3.
8, the rotation of the gear 16 is transmitted to the film rewinding gear 16 via the gear 13 and the gear 14, and the rotation of the gear 16 is transmitted to the pulley 16.
a, the belt 18, and the pulley 17 to a fork shaft (not shown), so that the fork shaft starts rewinding the film leader part F into the cartridge P.

At this time, the gear 8 and the cam 8a are connected to the first position of the cam locking member 10.
Since the gear 5 is also restrained from rotating by the arm 10a and the spring 28, the locking pawl 4 is also restrained at the position shown in FIG.
The back cover 1 is also in a locked state as shown in FIG.

In addition, in the process of changing the back cover 1 from the fully open state to the state shown in FIGS. 1 and 2 after inserting the cartridge into the camera, the other claw 1b attached to the back cover 1 and the locking claw 24 The engaged state is shown in FIG.

As shown in FIG.
4b, and the end surface 24c of the recess 24b, which faces the end surface of the claw 1b, and the end surface of the claw 1b are lightly (relatively slidable) each other when the back cover 1 is in a half-open state (FIG. 3). )
are in contact.

However, since the end surface 24c is formed as a non-flat surface with respect to the tip surface of the claw 1b, the locking claw 24 starts to rotate counterclockwise around the shaft 5b, as will be described later. 1b is locked to the locking claw 24 and the locking claw 2
It will now be moved in the movement direction of 4. (This will be explained again later.) When the film leader part F is rewound in the state shown in FIG. 2 until the tip of the film leader part F reaches the position of the roller 40. , the film leading end detection switch 201 (FIG. 8) provided near the roller 40 is turned on, and as a result, the rewind control circuit 202 is turned on.
When the operation of the switch 201 is turned on, the current supplied to the motor 30 by the motor drive circuit 204 is cut off, and the motor 30 is stopped.In response to the turning on of the switch 201, an output is generated from the inverter 207 to operate the hoisting control circuit 203. The winding control circuit 203 is the motor drive circuit 2.
A control signal is applied to 04 to rotate the motor 30 in the film winding direction. Therefore, after the motor 30 has stopped,
Immediately, the gear 31 begins to rotate clockwise in FIG. 2.

While the gear 31 is rotated clockwise in FIG. 2 by the motor 30, the sun gear 34 begins to rotate counterclockwise in FIG. The planetary gear 35 is rotated clockwise, and the planetary gear 35 is meshed with the spool gear 37 as shown in FIG. At the same time, the sun gear 13 is connected to the second gear via the gear 38.
The planetary lever 1 is rotated in the counterclockwise direction in the figure.
5 is also rotated in the counterclockwise direction from the position shown in FIG. It revolves towards. And planetary lever 1
5 or close to the gear 5, the shaft 22 of the planetary gear protruding from the planetary lever 15 is locked to the hook portion at the end of the second arm Job of the cam locking member 1o, At this point, the counterclockwise rotation of the planetary lever 15 is forcibly stopped, and the planetary gear 14 and gear 5 are engaged with each other, resulting in the state shown in FIG. 4.

When the sun gear 34 is rotationally driven in the counterclockwise direction by the motor 30 in the state shown in FIG. Start rotating.

On the other hand, since the sun gear 13 is rotated counterclockwise by the gear 38, the planetary gear 14 is rotated clockwise, and as a result, the gear 5 is rotated counterclockwise. When the gear 5 is rotated counterclockwise, the gear 8 and the cam 8a are rotated clockwise, and the protrusion 8C of the cam 8a also moves clockwise. The arm 10a of the cam locking member 10 is connected to the protrusion 8c by the spring 12.
As the projection 8C rotates clockwise, the arm IQa also follows the projection 8C, and as a result, the cam locking member 10 gradually rotates counterclockwise about the shaft 11.

When the gear 5 starts to rotate counterclockwise, the pin 5a also moves to the shaft 5b.
Since the locking pawl 4 moves counterclockwise around , the locking pawl 4 begins to move toward the upper right in FIG. Since it is pulled by the locking claw 4 toward the upper right (that is, the direction in which the back cover 1 is closed), the back M1 is closed.

On the other hand, since the shaft 5b also rotates counterclockwise together with the gear 5, the disc 23 (FIG. 3) fixed to the shaft 5b is also rotated counterclockwise, and is pivoted on the eccentric pin 23a of the disc 23. The locking pawl 24 also begins to rotate in the counterclockwise direction about the shaft 5b at the same time as the locking pawl 4 in FIG.

Shortly after the locking pawl 24 begins to rotate counterclockwise about the shaft 5b in FIG. It is driven by the stopper 24 toward the upper right in FIG. 3 (that is, in the direction of closing the back cover 1).

As described above, the back M1 is closed by the locking claws 4 and 24 by the power of the motor 30, and the protrusion IC on the opening edge of the back cover 1 is fitted into the groove 3a on the opening edge of the rear cover 3 of the camera. When the arm 10a of the cam locking member 10 is stuck, the tip of the arm 10a of the cam locking member 10 falls into the recess 8b of the cam 8a as shown in FIG. will be stopped. At the same time, as shown in FIG.
In order to move to the position where the lock of 2 is released, the planetary gear 14
The force keeping the gear 5 in mesh with the gear 5 disappears, and the planetary lever 5 is rotated counterclockwise about the axis of the sun gear 13 in response to the counterclockwise rotation of the sun gear 13. Along with this, the planetary gear 14 moves away from the gear 5 to a position where it collides with the gear 20 of the film feeding roller 19, and at the position where the planetary gear 14 meshes with the gear 20, the rotation of the planetary lever 15 is stopped. do. Therefore, at the same time as the back cover 1 is completely closed, the planetary gear 14 is moved to the film feeding roller 19.
It is in mesh with the gear 20 of. Further, the roller 40 attached to the back cover 1 is positioned at a position where the film is sandwiched between the roller 40 and the outer peripheral surface of the film feeding roller 19.

Note that the film feeding roller 19 is not rotated from the time the motor 30 starts rotating in the film winding direction until the back cover 1 is completely closed, so even if the spool is rotated, the film is not rotated until the back cover 1 is completely closed. The state shown in Figure 4 is maintained, and the film is not fed out from the cartridge P.

When the back cover 1 is completely closed, the claws 1a and 1b of the back cover 1 are locked by the locking claws 4 and 24, respectively, as shown in FIGS. 5 and 6, so the back cover 1 cannot be opened by hand. I can't.

After reaching the state shown in FIG. 5, the power of the motor 3o is transmitted to the gear 2o by the illustrated gear train, so that the film feeding roller 19 is rotationally driven in the counterclockwise direction in FIG. The portion F is fed out toward the aperture and spool chamber while being sandwiched between the roller 4o and the roller 19. When the film loading is completed by winding a part of the film leader and the leading end of the film onto a spool (not shown), the winding control circuit 20
3, the control signal applied to the motor drive circuit 204 disappears, the motor 30 is stopped, and the camera is set to a shooting standby state.

As is well known when taking pictures, when the release button 39 (Fig. 7) is pressed, the switch 205 shown in Fig. 8 is closed and distance measurement and light metering are performed automatically, and then, upon completion of exposure, the switch 205 shown in Fig. 8 is closed. The winding control circuit 203 is activated by an exposure completion signal input from the exposure control circuit 206 to the winding control circuit 203, and the motor drive circuit 204 operates the motor according to a control signal applied from the winding control circuit 203 to the motor drive circuit 204. 30 in the film winding direction. When the motor 30 is rotated in the film winding direction, the film feeding roller 19 is rotated as shown in FIG. 5, and the film is unwound from the cartridge P and sent to the spool chamber side. A sprocket (not shown) is rotated,
A feed switch 54 (FIG. 8) connected to the sprocket is turned on and off according to the number of perforations of the film. This number of pulses is counted by a counter built in the winding control circuit 203, and when the number of pulses input from the feed switch 54 reaches a predetermined number of pulses (one film frame feed amount), the circuit 203 starts the motor 30. A stop signal is applied to the motor drive circuit 204 to stop the motor 30.

After the above-described one-frame feeding is performed for each frame of the film, when a tension state occurs between the film cartridge P and the spool, an output signal is generated from the tension detection circuit 208, and the output signal is used for rewinding. The control circuit 202 is manually operated. Therefore, the control signal for rotating the motor 3o in the film rewinding direction from the rewind control circuit 202 is transmitted to the rewind control circuit 202.
04, the motor drive circuit 204 starts the motor 30 in the film rewinding direction.

When the motor 30 is rotated in the film rewinding direction, the sun gear 34 is rotated clockwise in FIG.
The planetary lever 36 revolves clockwise around the shaft and leaves the spool gear 37, and the planetary lever 36 comes into contact with the stopper 21 shown in FIG. 2 and stops. Furthermore, since the sun gear 13 is rotated clockwise, the planetary lever 15 is also rotated counterclockwise, and as a result, the planetary gear 14 is separated from the gear 20 of the film feeding roller 19 and revolves counterclockwise. do. At this time, since the arm 10b of the cam locking member 10 is in the position shown in FIG.
0b, and therefore the planetary gear 14 momentarily meshes with the gear 5, but it passes through the meshing position with the gear 5 and is moved to the position where it collides with the rewinding gear 16, where it meshes with the gear 16 ( (See Figure 2).

In addition, in the case of film rewinding, the gear train is
As shown in the figure, the position of the cam locking member 10 and the locking claw 4
The positions of gear 5 and cam 8a are maintained as shown in FIG.

Therefore, while the back cover 1 is completely closed as shown in FIG. 5, the gear train is in the state shown in FIG. The signal is transmitted to the pulley 17 via the pulley 17, and further transmitted from the pulley 17 to a fork shaft (not shown) to rewind the film.

The state of the cam locking member 10 when the back cover 1 is completely closed is shown in FIG. 5, but in order to further rotate the cam locking member 10 clockwise from the position shown in FIG. An operating member (not shown) is provided, and the operating member is activated when film rewinding is completed when the back cover is completely closed. When the cam locking member 10 is further rotated clockwise from the position shown in FIG. 5 by operating the operating member, the back cover 1 can be opened, but the configuration related to this operating member is different from the original. Since this is not a subject of the invention, illustration and description will be omitted.

[Effects of the Invention] The camera of the present invention has the following effects.

(a) When the back cover is partially open, it is temporarily locked by the locking means so that it cannot be manually moved to either the open or close side, making it impossible to detect the leading edge of the film during the rewinding process of part of the film leader. There is no fear.

(b) Since the means for locking the back cover is not directly connected to the motor, there is no risk of damage to the motor even if a large external force is applied to the back cover with the back cover partially open.

(C) In the above embodiment, the gear 5 and the disk 23, which are unlocking means, are connected to the locking pawl, which is the locking means of the back cover, and the locking means and the unlocking means are integrated. Since the release means and the locking means are structured to double as the back cover automatic closing means, the overall structure is smaller and simpler than when these three means are provided separately, and it is possible to reduce the size of the camera. It is important to prevent weight loss and weight gain.

Further, in the above embodiment, the locking means (claws Ia, 1b,
Since the locking claws 4, 24) are provided on the top and bottom of the back cover, the back cover can be locked evenly, and there is no risk of one side of the back cover floating.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the state of a camera according to an embodiment of the present invention when the back cover is manually closed to the half-open position after loading the cartridge, and FIG. FIG. 3 is a diagram showing the state before rewinding into a part of the camera is started, and FIG. Figure 4 shows a state in which the film leader is partially rewound inside the camera after the state shown in Figure 2; Figure 5 shows the film leader in a position corresponding to the state shown in Figure 4 Figure 6 shows the state before the back cover is automatically closed and a part of the film leader is sent out toward the spool chamber after the state shown in the figure.
The figure shows the structural part shown in Fig. 3 in a position corresponding to the state in Fig. 5, Fig. 7 is a rear side oblique view of the camera of this embodiment, and Fig. 8 is FIG. 2 is a diagram showing a part of the camera control device according to the present embodiment. 1... Back fi Ia and 1b... Claw 3
... Rear cover 4 ... Locking claw 5 ... Gear
6... Spring 7... Stopper 8.
...Gear 8a...Cam 10...Cam locking member] 2...Spring 13...Sun gear 14
... Planetary gear 15 ... Planetary lever 16 ...
Rewinding gear 16a...Pulley 17...Pulley 18...Belt 19...Film feeding roller 20...Feeding roller gear 23...Disc 24...Latching claw 25...・・・
Spring 26...Stopper 27...Switch 28...Spring 29...Bin 3
0...Motor 34...Sun gear 35...Planetary gear 36...Planetary lever 37...Spool gear 40...Roller

Claims (2)

[Claims] (1) A locking means that once locks the back cover in a half-open position when closing the back cover, a lock release means that automatically unlocks the back cover after it is locked by the locking means, and the lock release means 1. An automatic closing means for automatically moving the unlocked back cover from a half-open position to a fully closed position by non-manual operation. (2) Claim 1 states that the camera is of a type in which film loading is completed only by manually closing the back cover to the half-open position after inserting the cartridge into the camera. Featured camera.