JPH0922049A - Motor-driven single lens reflex camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera which can be miniaturized by making plural motors separately and efficiently take partial charge of driving for various operations such as a film winding/rewinding drive, a shutter charging drive and a rising up/down drive for a quick return mirror, etc. SOLUTION: The camera is provided with a 1st motor 52 for performing a film feeding drive for feeding the film from a film cartridge 33 to the outside, a film rewinding drive for taking up the film into the cartridge and a disk member rotating drive for rotating the disk member by rotating/driving a spool 31, and also there is provided with a 2nd motor 60 for performing a film winding drive for winding the film fed from the film cartridge to the outside on a winding spool 35 installed in a spool chamber by rotating/driving the winding spool 35, the shutter charging drive and the rising up/down drive for the quick return mirror 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric single-lens reflex camera which drives a motor to wind and rewind a film, charge a shutter, and move a quick return mirror up and down.

[0002]

2. Description of the Related Art US Pat. No. 5,122,
As known from JP-A No. 820 and JP-A No. 5,296,887, etc., in the unused state, even the leading end of the film is wound into the cartridge, and the light-shielding door provided in the cartridge is opened during use. There has been proposed a film cartridge for a camera having a structure in which a spool in the cartridge is rotated to feed the film.

In a camera using a film cartridge of this type, when a motor is used to drive various operations of the camera (film winding / rewinding, shutter charge, quick return mirror up / down, etc.) However, unless the drive sharing of the motors and the arrangement of the motors are efficiently determined, the size of the camera and the number of motors increase, which is not preferable.

In a camera using a film cartridge of this type, the film cartridge is loaded into the cartridge chamber of the camera, and immediately after the opening / closing lid for opening / closing the cartridge chamber is closed, the spool in the film cartridge is rotated by a motor. No mechanism has been proposed for driving the film out of the film cartridge.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to film winding / rewinding,
Shutter charge, quick return mirror up
An object of the present invention is to provide an electric single-lens reflex camera in which driving of various operations such as down is efficiently shared by each of a plurality of motors, thereby enabling downsizing of the camera.

[0006]

SUMMARY OF THE INVENTION The present invention is a single-lens reflex camera that uses a film cartridge having a spool; a disk member that rotates with the spool and has a bar code formed in the circumferential direction. Then, a film feeding drive for sending the film wound on the spool from the inside of the film cartridge to the outside; a film rewinding drive for rotating the spool to wind the film into the cartridge; reading the information of the bar code A first motor for rotating the spool member to rotate the disk member.
Film winding drive for rotating the winding spool provided in the spool chamber of the camera to wind the film, which has been fed out from the film cartridge by the film feeding drive of the first motor, onto the winding spool.
It is characterized by including a shutter charge drive; and a second motor for performing up / down drive of a quick return mirror.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on illustrated embodiments. FIG. 1 is a front view showing the internal structure of a single-lens reflex camera 30 to which the present invention is applied. This camera 30
As a photographic film, US Pat. No. 5,122,82
A film cartridge of the type known from Japanese Patent No. 0, No. 5,296, 887, etc. is used. First, the film cartridge will be described. 4 and 5
[Fig. 4] is a perspective external view showing this film cartridge.

The film cartridge 1 has a cartridge outer frame 3 composed of a pair of outer frame halves 5 and 7. A spool 11 around which a silver salt film F (FIG. 2) having a magnetic recording layer is wound is housed in the inner space of the cartridge outer frame 3. A hole 15 for exposing the corresponding fork engaging hole 11a formed at the shaft end of the spool 11 to the outside is formed in the central portion of each end surface 13 of the cartridge outer frame 3.

Further, the cartridge outer frame 3 is formed with a rectangular film feeding / receiving opening 17 along the longitudinal direction thereof, and the film feeding / receiving opening 17 is opened and closed along the film feeding / receiving opening 17. A door 19 is provided. A shaft portion 19a coaxially positioned is integrally formed at each of both ends in the longitudinal direction of the light shielding door 19. Each shaft portion 19a is rotatably fitted in a hole 21 formed in the corresponding end surface 13 of the cartridge outer frame 3. A key groove 19b is formed on the end surface of each shaft portion 19a. A driver (not shown) of a known driver driving mechanism (not shown) provided on the camera 30 side engages with one key groove 19b, and the light-blocking door 19 is opened and closed by the rotation of the driver. The film in the film cartridge 1 is spooled with the light shielding door 19 opened.
When 1 rotates, it is fed out from the film feed-in opening 17 or is stored inside the cartridge outer frame 3.

A disk 23 having a bar code 26 is provided between one end of the spool 11 and the end surface 13 on the side facing the one end. This disc 2
3 is fitted to one end of the corresponding spool 11 so as not to rotate relative to the spool 11. That is,
The disk 23 is rotatable together with the spool 11. As shown in FIG. 6, the disk 23 has cutout portions 24 (24) that extend radially and have different circumferential widths.
a, 24b, 24c, 24d, 24e) and the flat surface portion 25 (25a, 25b, 25) located between these notches.
c, 25d) are formed. A bar code 26 is formed by the cutout portion 24 and the flat surface portion 25. The bar code 26 includes ISO speed information of the film stored in the film cartridge 1 and information on the number of recordable images. The barcode 26 is exposed to the outside of the film cartridge 1 through a window 27 formed in the end surface 13 on the corresponding side.

Next, the camera 30 will be described in detail. Inside the camera 30, a spool chamber 31 and a cartridge chamber 33 are formed on the left and right. A hoisting spool 35 is rotatably provided in the spool chamber 31. Camera 30
An open / close lid (not shown) for opening / closing the cartridge chamber 33 is supported by the camera body 30a of FIG.

In the camera 30 of this embodiment, the film cartridge 1 is loaded into the cartridge chamber 33, and subsequently, an opening / closing lid (not shown) for opening and closing the cartridge chamber 33 is closed and locked, and then the film in the film cartridge 1 is closed. Is wound up on the winding spool 35 and set on the spool chamber 31 side, and a film feeding system for rewinding and storing the photographed photographed piece toward the film cartridge 1 every time one photographed piece is completed, so-called It uses a prewind feeding system.

At the upper end of the cartridge chamber 33, a support projection 37 that engages with one of the fork engaging holes 11a of the film cartridge 1 is provided so as to project downward, and at the lower end of the cartridge chamber 33. , The spool 1 by engaging with the other fork engaging hole 11a of the film cartridge 1
A spool drive driver 39 that drives the drive unit 1 is provided so as to project upward.

At the lower end of the cartridge chamber 33, the data of the bar code 26 of the disc 23 is read at a position facing the window 27 of the film cartridge 1 when the film cartridge 1 is loaded in the cartridge chamber 33. Photo sensor 112 is fixed.

Between the spool chamber 31 and the cartridge chamber 33, left and right side walls 40a and 40b, and these side walls 40 are provided.
A mirror box 40 including a bottom plate 40c connecting the lower ends of a and 40b is provided. A publicly known quick return mirror 42 is provided in the mirror box 40. A penta prism 46 is provided above the quick return mirror 42 by inserting a focusing plate 44, and below the quick return mirror 42, a subject divided into two by a pair of imaging lenses (not shown). A known AF module 48 for performing distance measurement by detecting a phase difference between images is provided.

Further, the spool chamber 31 and the cartridge chamber 3
An electronically controlled focal plane shutter unit 50 is provided between the three. The shutter unit 50 is provided behind the mirror box 40 (upper side in FIG. 2) and has a shutter portion 50a having a plurality of shutter curtains.
And a shutter drive mechanism section 50b disposed between the spool chamber 31 and the mirror box 40 for driving the plurality of shutter curtains.

A pressure plate 55 extending parallel to the shutter portion 50a is provided behind the shutter portion 50a. Immediately after the shutter portion 50a, a rectangular aperture (not shown) that determines the shooting range and a film guide rail (not shown) that is located above and below the aperture and extends in the left-right direction of the camera 30 are provided. An aperture frame (not shown) is fixedly provided to the camera body 30a,
Immediately after the aperture frame, a pressure plate 55 is provided adjacently. The pressure plate 55 has a pair of photo reflectors 55a for detecting the perforation (not shown) of the film F to detect the traveling state and the feed amount of the film F.
A magnetic head 55b for writing shooting data (shutter speed, aperture value, subject brightness information, strobe use / non-use information, shooting date, etc.) is provided on the magnetic recording layer of the film F. A film pressing pad 57 is fixed to a position of the aperture frame (not shown) facing the magnetic head 55b. The film F is pressed against the magnetic head 55b by the film pressing pad 57 with an appropriate pressure.

Mirror box 40 and cartridge chamber 33
In between, the rotation axis 52a is in a direction parallel to the vertical direction of the camera 30, that is, perpendicular to the traveling direction of the film F (left and right direction in FIGS. 1 and 2) and parallel to the film surface. A first motor 52 is provided along the line. The rotation of the rotary shaft 52a of the first motor 52 is
Transmission to the spool drive driver 39 via an output pinion 53 fixed to a, a reduction gear train 54 provided below the motor 52, a planetary gear unit 56, and a driver gear 58 that rotates integrally with the spool drive driver 39. To be done.

The first motor 52 performs the following three types of drive. That is, immediately after the film cartridge 1 is loaded into the cartridge chamber 33 and the opening / closing lid (not shown) of the cartridge chamber 33 is closed and locked, the first motor 52 outputs the data of the barcode 26 of the spool 11 to the photo sensor. A predetermined amount of spool drive driver 39 (eg 1-2 revolutions) to read via 112.
Disk member rotation driving for normal rotation driving (clockwise driving in FIG. 2) and then spool driving for sending the film F in the film cartridge 1 to the outside and sending the tongue of the film F to the spool chamber 31. The film feeding drive for driving the driver 39 in the reverse direction (driving in the counterclockwise direction in FIG. 2) and the spool drive driver 39 for storing the exposed film F in the film cartridge 1 after the photographing of one frame is completed. A film rewinding drive for performing a normal rotation drive (clockwise drive in FIG. 2) is performed.

In the vicinity of the lower end of the shutter drive mechanism section 50b, a second motor 60 having its rotation axis 60a along a direction parallel to the left-right direction of the camera 30, that is, a direction parallel to the traveling direction of the film F is provided. ing. This second motor 60
The rotation of the rotating shaft 60a of the
5, transmitted to the hoisting spool 35 via the reduction gear train 70 and the like, and transmitted to the shutter charge gear 90 and the mirror drive gear 100 via the planetary gear unit 75, the reduction gear train 80 and the like.

The second motor 60 performs the following three types of drive. That is, the second motor 60 drives the spool 3
1 is rotationally driven to wind the film F sent out from the film cartridge 1 onto the spool 31, film winding drive, shutter charge drive for shutter charging the shutter unit 50, and up / down drive of the quick return mirror 42. And do.

According to the present invention, as described above, the first motor 52
It is characterized in that each of the second motor 60 and the second motor 60 is provided with an efficient drive sharing. Hereinafter, the rotation transmission mechanism of the first motor 52 and the second motor 60 will be described in detail.

First, the rotation transmission mechanism related to the first motor 52 will be described. The planetary gear unit 56 includes a sun gear 56a that meshes with a final gear 54a of a reduction gear train 54 including a plurality of gears, and a planetary gear 5 that meshes with the sun gear 56a.
6b. The planetary gear 56b has a rotating arm 5 whose one end is pivotally supported by a rotating shaft 56c of the sun gear 56a.
It is rotatably provided at the other end of 6d. The rotating arm 56d rotates only between a first position shown by a solid line in FIG. 2 and a second position shown by a chain double-dashed line by a stopper (not shown) fixed to the camera body 30a. It is possible. A small-diameter gear 59 is provided near the planetary gear portion 56.
A relay gear train 59 is provided that includes a and a large-diameter gear 59b that meshes with the small-diameter gear 59a and the driver gear 58.

When the rotating arm 56d is in the first position, the planet gear 56b meshes with the driver gear 58. When the rotating arm 56d is in the second position, the planet gear 56b meshes with the small diameter gear 59a.

With the above structure, when the rotary shaft 52a of the first motor 52 rotates in one direction, the final gear 54a moves to the position shown in FIG.
In the clockwise direction, which causes the sun gear 56a to rotate in the counterclockwise direction in the figure. By this rotation, the rotating arm 56d rotates in the same direction and moves to the first position,
As a result, the planetary gear 56 that rotates in the clockwise direction in FIG.
b meshes with the driver gear 58. Therefore, the driver gear 58 rotates in the counterclockwise direction in the figure and the spool drive driver 39 rotates in the same direction. On the other hand,
When the rotation shaft 52a of the first motor 52 rotates in the other direction,
The final gear 54a rotates counterclockwise in FIG. 2, which causes the sun gear 56a to rotate clockwise in FIG. By this rotation, the rotating arm 56d rotates in the same direction and moves to the second position, whereby the planetary gear 56b rotating counterclockwise meshes with the small diameter gear 59a. The large-diameter gear 59b, which has received the rotation of the small-diameter gear 59a that rotates clockwise in the same figure, rotates counterclockwise, so that the driver gear 58 rotates clockwise in the same figure, and the spool drive driver 39 Rotate in the same direction.

Next, the rotation transmission mechanism related to the second motor 60 will be described. Output pinion 61 of second motor 60
Engages with a large-diameter gear portion 71a of a double gear 71 that has a large-diameter gear portion 71a and a small-diameter gear portion 71b coaxially and integrally. The small-diameter gear portion 71b meshes with the sun gear 75a of the planetary gear portion 75.

The planetary gear portion 75 has a sun gear 75a that meshes with the small diameter gear portion 71b and a planetary gear 75b that meshes with the sun gear 75a. This planet gear 75b
Is rotatably provided at the other end of a rotating arm 75d whose one end is pivotally supported by the rotating shaft 75c of the sun gear 75a. The rotating arm 75d rotates only between a first position indicated by a solid line in FIG. 3 and a second position indicated by a chain double-dashed line by a stopper (not shown) fixed to the camera body 30a. It is possible. In front of the planetary gear unit 75 (on the right side in FIG. 3), the first to third reduction gears 80a, 80b,
A reduction gear train 80 composed of 80c is provided. Third
A shutter charge gear 90 meshes with the reduction gear 80c, and a mirror drive gear 100 meshes with the shutter charge gear 90.

The rotating shaft 80d of the third reduction gear 80c is
One end 91a of a shutter charge lever 91 having a substantially V shape is rotatably supported. An engagement portion 91c for engaging with a charge engagement portion (not shown) of the shutter drive mechanism portion 50b to perform shutter charging is fixed to the free end portion 91b of the shutter charge lever 91. Further, in the approximate center of the shutter charge lever 91,
The convex portion 91d is the rotation shaft 90 of the shutter charge gear 90.
It is projected in the direction toward a, and on this convex portion 91d,
A roller 91e is rotatably provided. The shutter charge lever 91 is constantly urged in the clockwise direction in FIG. 3 by urging means (not shown) such as a compression spring.

The shutter charge gear 90 is integrally formed with a shutter charge cam 90c having a predetermined shape, the cam surface 90b of which is in sliding contact with the roller 91e. When the shutter charge gear 90 rotates clockwise in FIG. 3, the cam surface 90 of the shutter charge cam 90c is rotated.
The roller 91e is moved by the above-mentioned b, and the biasing means (not shown)
The shutter charge lever 91 is rotated counterclockwise in FIG.

In the vicinity of the mirror drive gear 100 that meshes with the shutter charge gear 90, one end 103a is provided on a rotary shaft 102 parallel to the rotary shaft 100a of the mirror drive gear 100.
A curved mirror drive lever 103 pivotally supported is provided. At the other end of the mirror drive lever 103, an engaging portion 103b is formed which is engageable with the mirror sheet pin 105 of the quick return mirror 42 pivotally supported by the rotating shaft 104. A convex portion 103 c is provided at a substantially central portion of the mirror driving lever 103, and
The protrusion 103c is provided so as to project in the direction toward 0a.
Further, a roller 103d is rotatably provided. The mirror drive lever 103 is always biased in the counterclockwise direction in FIG. 3 by a biasing means (not shown) such as a compression spring.

The mirror drive gear 100 has a cam surface 1
A mirror-up cam 100c having a predetermined shape is formed integrally so that 00b slides on the roller 103d. As the shutter charge gear 90 rotates, the mirror drive gear 10
When 0 rotates in the counterclockwise direction in FIG. 3, the roller 1 is moved by the cam surface 100b of the mirror up cam 100c.
03d is pushed up against the urging means (not shown), whereby the mirror drive lever 103 rotates in the clockwise direction in the figure.

In the vicinity of the second motor 60, a shaft 65 extending in the left-right direction of the camera 30 and rotatably supported is provided (FIG. 2). In the vicinity of the shaft 65, a condenser 62 for a built-in flash (not shown) of the camera 30 and a battery chamber 63 for accommodating a battery serving as a power source of the camera 30 are provided. A pinion 65a engageable with the planetary gear 75b is provided at one end of the shaft 65.
Is fixed, and the worm 65b is fixed to the other end. The rotation of this worm 65b is
Is transmitted to a spool gear 35a provided below the hoisting spool 35 and rotating integrally with the spool via a reduction gear train 70 provided in the vicinity of. Reduction gear train 70
Is composed of first to third double gears 70a, 70b, 70c each having a large-diameter gear portion and a small-diameter gear portion integrally coaxially. The large-diameter gear portion of the first double gear 70a meshes with the worm 65b. It is formed as a wheel 70d, and a small diameter gear portion 70e of the third double gear 70c meshes with the spool gear 35a.

When the rotating arm 75d is in the first position, the planet gear 75b meshes with the first reduction gear 80a. When the rotating arm 75d is in the second position indicated by the chain double-dashed line, the planet gear 75b meshes with the pinion 65a fixed to one end of the worm shaft 65.

With the above structure, when the rotating shaft 60a of the second motor 60 rotates in one direction (counterclockwise direction in FIG. 3), the double gear 71 rotates in the clockwise direction in FIG. 3, which causes the sun gear 75a. Rotates counterclockwise in the figure. By this rotation, the rotating arm 75d rotates in the same direction and moves to the first position, whereby the planetary gear 75b rotating in the clockwise direction in the figure meshes with the first reduction gear 80a. Therefore, as described above, the rotation of the planetary gear 75b that rotates in the clockwise direction in the figure is transmitted via the reduction gear train 80 to the shutter charge gear 90 and the mirror drive gear 1.
00, so that the shutter charge gear 90 rotates, whereby the shutter charge lever 91 moves downward to perform shutter charge, and the mirror drive gear 100 rotates, which causes the mirror drive lever 103 to move upward. And the engaging portion 103b pushes up the mirror sheet pin 105 to move to the quick return mirror 4
2 is moved up (rotated in the counterclockwise direction in the figure around the rotary shaft 104). Reference numeral 42a in FIG. 3 is a known sub-mirror provided on the rear surface of the quick return mirror 42 for guiding a part of the subject light to the AF unit 48.

On the other hand, when the rotary shaft 60a of the second motor 60 rotates in the other direction (clockwise direction in FIG. 3), the double gear 71 rotates in the counterclockwise direction in FIG. 3, which causes the sun gear 75a to rotate. Rotate clockwise. By this rotation, the rotating arm 75d rotates in the same direction and moves to the second position shown by the chain double-dashed line, whereby the planetary gear 75b rotating in the counterclockwise direction in the figure is fixed to one end of the shaft 65. It meshes with the pinion 65a. Therefore, as described above, the rotation of the planetary gear 75b that rotates in the counterclockwise direction causes the pinion 65a, the shaft 65, and the worm 6 to rotate.
5b and the reduction gear train 70 are transmitted to the spool gear 35a.

The camera 30 to which the present invention having the above structure is applied operates as follows. With the main switch (not shown) of the camera 30 turned on, the film cartridge 1 having the unexposed (unused) film F is properly inserted into the cartridge chamber 33, and then the opening / closing lid (not shown) of the cartridge chamber 33 is shown. If you close and lock
The light-blocking door 19 is opened by the driver driving mechanism (not shown) described above. When the opening of the light-shielding door 19 is detected by a sensor (not shown) or the like, the control unit (CPU) 110 that performs overall control of the camera 30 drives the rotation shaft 52a of the first motor 52 in the forward direction to finally rotate the rotation shaft 52a. The gear 54a rotates in the counterclockwise direction in FIG. 2 by a predetermined amount, whereby the spool drive driver 39 is rotated in the clockwise direction in FIG. 2 via the planetary gear portion 56, the reduction gear train 59, and the driver gear 58 to spool the spool. 11 is rotated 1-2 times in the same direction (disk member rotation drive). The disk 23 rotates together with the rotation of the spool 11, and during the rotation of the disk 23, the control means 110 passes the photo sensor 112 for reading the data of the bar code 26 to the film F included in the bar code 26. The ISO speed information and the information about the number of recordable images are read. The film F is not delivered from the film cartridge 1 when the spool 11 is rotated in the clockwise direction in FIG.

After reading the bar code data,
The control means 110 stops the first motor 52 and then
The rotation shaft 52a of the first motor 52 is reversely driven to rotate the final gear 54a in the clockwise direction in FIG. 2 (film feeding drive). Then, the rotation of the final gear 54a is transmitted to the driver gear 58 via the planetary gear portion 56, and the spool drive driver 39 is rotated counterclockwise in FIG. 2 to rotate the spool 11 in the same direction to rotate the film F. Is sent out from inside the film cartridge 1. The delivered film F is sent toward the spool chamber 31 through between the pressure plate 55 and the aperture frame (not shown). After that, when the perforation of the film F is detected through the photo reflector 55a, the control means 1
No. 10 stops the first motor 52 because the film feeding drive is completed (the tongue at the leading end of the film F is surely engaged with the winding spool 35).

Further, the control means 110 includes the first motor 5
Simultaneously with the reverse rotation drive (film feed drive) of the second rotary shaft 52a, the rotary shaft 60a of the second motor 60 is normally driven to rotate in the clockwise direction of FIG. 3 (film winding drive).
Then, the rotation of the rotating shaft 60a is, as described above,
It is transmitted to the spool gear 35a via the double gear 71, the planetary gear unit 75, the pinion 65a, the shaft 65, the worm 65b, and the reduction gear train 70, and the spool gear 35a rotates in the counterclockwise direction in FIG.
Rotate 5 in the same direction. When the tongue at the leading end of the film F reaches the position where the tongue of the film F is engaged with the hoisting spool 35 by the rotation of the first motor 52, the hoisting spool 35 catches the tongue end of the tongue of the film F and the hoisting spool 35 moves to the film. Wind up F. After that, the control unit 110 stops the second motor 60 when detecting that the film F is not traveling, that is, the winding of the film F is completed, via the photo reflector 55a. At this time, the photo sensor 112 for reading the data of the bar code 26 of the disk 23 provided in the camera 30 is used to detect the state in which the disk 23 is not rotating, and the winding of the film F is completed. Control means 1
The configuration may be such that 10 detects. Further, regarding the stop control of the second motor 60, the data of the bar code 26 (information on the number of shootable images) is read, and the photo reflector 55a is read.
The second motor 60 may be stopped at the time when a predetermined number of frames (the number of shootable images) is detected via the. After this stop, the first frame of the film F is placed at a predetermined position corresponding to an aperture (not shown).

Subsequently, the control means 110 controls the first motor 5
The rotation shaft 52a of No. 2 is normally driven to start winding the film F into the film cartridge 1. Then, the first frame (first shooting frame) of the film F becomes an aperture through the photo reflector 55a. When it is detected that it is located at the corresponding predetermined position, the first motor 52 is stopped (film loading is completed).

After the film loading is completed, when the photographer presses the release button 119 of the camera 30, the control means 110 reversely drives the rotating shaft 60a of the second motor 60, and subsequently the shutter charge of the shutter drive mechanism section 50b. Release the hold. As described above, the double gear 71 and the sun gear 75 are driven by the reverse rotation of the rotating shaft 60a.
a, the rotating arm 75d, the planetary gear 75b, the reduction gear train 80, and the shutter charge gear 90 rotate the mirror drive gear 100, and the mirror up cam 100c of the mirror drive gear 100 raises the roller 103d, Drive lever 103, mirror sheet pin 105
The quick return mirror 42 ascends via the (quick return mirror up drive). When the raising of the quick return mirror 42 is completed, the control means 110
The second motor 60 is stopped, and immediately after that, the shutter drive mechanism section 50b is driven to perform exposure.

After completion of this exposure, the control means 110 controls the second
The rotation shaft 60a of the motor 60 is driven in the reverse direction again to rotate the mirror drive gear 100 to rotate the quick return mirror 42.
Down (quick return mirror down drive),
At the same time, the rotation of the shutter charge gear 90 causes the shutter charge cam 90c to push down the roller 91e, and the shutter charge is performed via the shutter charge lever 91 (shutter charge drive). After completion of this shutter charge, the control means 110 causes the second motor 60 to
To stop. Further, after the exposure is completed, at the same time as the rotation shaft 60a of the second motor 60 is driven in the reverse direction, the control means 110 drives the rotation shaft 52a of the first motor 52 in the normal direction to rotate the film F.
The film is wound into the film cartridge 1 (film rewinding drive), and during this winding, the photographed data of this one frame is recorded on the exposed first frame of the magnetic recording layer through the magnetic head 55b. The photo reflector 5 indicates that one frame of the F frame has been sent to the film cartridge 1.
When detected through 5a, the first motor 52 is stopped.
This completes the setting of the second frame. afterwards,
The same operation as that after the completion of the film loading described above is repeated to capture the second and subsequent frames.

After the exposure of the final frame is completed, the first motor 5
When the film F is wound into the film cartridge 1 by driving the rotating shaft 52a of the second rotor 2 in the normal direction, the photo reflector 55
When the perforation of the film F is not detected for a certain period of time via a, or when a predetermined number of image frames have been photographed, the control means 110 continues to drive the rotating shaft 52a of the first motor 52 in the forward direction for a certain period of time. Film F is completely wound into the film cartridge. After the elapse of this fixed time, the control means 110 stops the first motor 52.
Then, the photographer opens and closes the spool chamber 33 (not shown).
When the lock is released, the light-blocking door 19 of the film cartridge 1 is closed by the above-mentioned driver driving mechanism (not shown) in association with this release. In this state, the film cartridge 1 can be taken out from the cartridge chamber 33.

The camera 30 of this embodiment employs a prewind feeding method as a film feeding method, but the present invention is not limited to this, and one film frame is loaded after the film cartridge 1 is loaded. Spool chamber 3 each time it finishes
The present invention can also be applied to a conventional film feeding system in which the film is wound up to the 1 side and wound up and stored in the film cartridge 1 after the completion of all photographing frames.

In the above embodiment, the second motor 60 is arranged near the lower end of the shutter drive mechanism 50b with the rotary shaft 60a being along the direction parallel to the traveling direction of the film F. However, the present invention is not limited to this configuration.
That is, the second motor 60 may be arranged near the upper end of the shutter drive mechanism section 50b with the rotary shaft 60a along the direction parallel to the traveling direction of the film F.

In the above-mentioned embodiment, the film cartridge is used as a film cartridge in US Pat.
Although the film cartridge of the type known from Japanese Patent No. 296,887 has been described, it goes without saying that the present invention is also applied to a camera using another type of film cartridge having a disk member on which a barcode is formed.

[0046]

As described above, according to the electric single-lens reflex camera of the present invention, the driving of various operations such as film winding / rewinding, shutter charging, and up / down of the quick return mirror are provided in the camera. Moreover, since the first motor and the second motor are efficiently shared, the camera can be downsized. A first motor is disposed between the mirror box and the cartridge chamber in a state where the rotation axis is substantially orthogonal to the film traveling direction, and the shutter drive mechanism is in a state where the rotation axis is substantially parallel to the film traveling direction. If the second motor is arranged at the upper end or the lower end of the section,
Since it is an efficient arrangement suitable for driving sharing of each motor,
The camera can be made smaller.

[Brief description of drawings]

FIG. 1 is a front view showing the internal structure of an electric single-lens reflex camera to which the present invention has been applied.

FIG. 2 is a top view showing a main part of the electric single-lens reflex camera shown in FIG.

3 is a front view showing a shutter charge mechanism and a mirror drive mechanism of the electric single-lens reflex camera shown in FIG.

FIG. 4 is a perspective external view of a film cartridge.

5 is a perspective external view of the film cartridge of FIG. 5 as viewed from a different angle. FIG.

FIG. 6 is a perspective external view showing a film take-up spool provided in the film cartridge shown in FIG.

[Explanation of symbols]

 1 film cartridge 30 electric single-lens reflex camera 31 spool chamber 33 cartridge chamber 40 mirror box 42 quick return mirror 46 pentaprism 50 shutter unit 52 first motor 54 reduction gear block 56 planetary gear section 60 second motor 70 reduction gear train 75 planetary gear Part 80 Reduction gear train 90 Shutter charge gear 91 Shutter charge lever 100 Mirror drive gear 103 Mirror drive lever 110 Control means

Claims (3)

[Claims] 1. A single-lens reflex camera using a film cartridge having a spool; and a disk member that rotates together with the spool and has a bar code formed in the circumferential direction thereof. A film feeding drive for sending the film wound on the spool to the outside from the film cartridge; a film rewinding drive for rotating the spool to wind the film into the cartridge; and a spool for reading the information of the bar code. A disk member rotational drive for rotating the disk member by rotating the disk member;
A first motor for carrying out the above; the film sent out from the inside of the film cartridge by the film sending drive of the first motor is wound on the hoisting spool by rotationally driving the hoisting spool provided in the spool chamber of the camera. An electric single-lens reflex camera comprising: a film winding drive; a shutter charge drive; a second motor for up / down drive of a quick return mirror; 2. The first motor according to claim 1, wherein a rotation axis of the first motor is substantially orthogonal to a traveling direction of the film between a mirror box having a quick return mirror therein and a cartridge chamber accommodating the film cartridge. The second motor is disposed substantially parallel to the film surface, and the second motor is an electric motor disposed adjacent to the shutter drive mechanism portion with its rotation axis substantially parallel to the film traveling direction. Single-lens reflex camera. 3. The first motor according to claim 1, wherein the first motor performs the film feeding drive by rotationally driving the rotating shaft in one direction, and performs the film rewinding drive and the disc member rotational driving by rotational driving in the other direction. The second motor is an electric single-lens reflex camera that drives the shutter charge by rotating the rotating shaft in one direction and drives the quick return mirror up and down, and drives the film winding by rotating the other direction.