JPH0922048A - Motor-driven camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera with a film feeding drive part whose structure is simplified and whose space is saved, and capable of efficiently feeding a film out of a film cartridge. SOLUTION: The camera is provided with a cartridge chamber 33 for housing the film cartridge, a spool chamber 31 with a wind-up spool 35 for winding up the film in the cartridge chamber installed inside, a 1st motor 52 for performing a film feeding drive of rotating/driving the spool after the film cartridge is loaded so that the film may be fed from the film cartridge to the outside and performing a film rewinding drive of rotating/driving the spool in the other direction and taking up the film into the film cartridge, a 2nd motor 60 for performing a film wind-up drive of driving the wind-up spool so as to wind up the film fed out of the film cartridge and a control means 110 for performing the driving control of the 1st motor and the 2nd motor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric camera in which various motor-related operations (film winding / rewinding, shutter charging, quick return mirror up / down, etc.) are driven by a motor.

[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 from the light shielding door.

In a camera using a film cartridge of this type, when the film cartridge is inserted into the cartridge chamber of the camera and the opening / closing lid of the cartridge chamber is closed and locked, first, the film is pushed out from the film cartridge (delivered). The film is sent to the spool chamber of the camera, and then the film sent to this spool chamber is caught by the hoisting spool in the spool chamber and wound up, and then the completion of setting of the first frame is detected by the sensor etc. An automatic loading mechanism is generally adopted in which the hoisting spool stops when this is done.

In such a camera, a film feeding drive unit for rotating the spool in the film cartridge to push the film out of the film cartridge,
Conventionally, a winding spool drive unit that rotates a winding spool to wind the film sent to the spool chamber by the film delivery drive unit is mechanically linked to each other, and By making a difference in the gear reduction ratio of the gear trains of the above, it is possible to achieve the relation of "feeding speed by the film feeding drive unit <winding speed by the winding spool drive unit", and further, a slip clutch or A one-way clutch is provided to mechanically absorb the difference between the delivery speed and the hoisting speed.

Usually, the film feeding drive unit and the winding spool drive unit are respectively provided on the left and right sides of the camera with an aperture (shooting opening) that determines a rectangular shooting screen interposed therebetween. Therefore, the mechanical coupling portion has a structure in which both driving portions are coupled to each other across the left and right sides of the camera by using a shaft, an endless belt, an idle gear, etc. There was a limit to the degree of freedom in designing the gear reduction ratio.

[0006]

It is an object of the present invention to use a film cartridge having a structure in which even the leading end of the film is wound into the cartridge when it is not in use, and the spool in the cartridge is rotated to deliver the film when in use. The camera has a simple structure and space saving,
An object of the present invention is to provide an electric camera equipped with a film feeding drive unit capable of efficiently feeding a film from inside a film cartridge.

[0007]

SUMMARY OF THE INVENTION According to the present invention, in a camera using a film cartridge containing a spool around which a film is wound, a cartridge chamber for accommodating the film cartridge; a film sent from the inside of the film cartridge to the outside. A spool chamber having a winding spool for winding the film; and after the film cartridge is loaded into the cartridge chamber, the spool is driven to rotate in one direction to send the film wound on the spool to the outside from the film cartridge. A first motor for performing a film feeding drive for rotating the spool in the other direction, and a film rewinding drive for winding the film into the film cartridge by driving the spool in the other direction; The sent film is A second motor for rotating and winding the film to wind up the film; and a control means for controlling the drive of the first motor and the second motor; the control means drives the first motor for feeding the film. It is characterized in that control is performed by driving with pulse current when performing, and driving by direct current when performing film rewinding drive.

[0008]

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. FIG. 6 is a perspective external view showing a spool provided in 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.

The cartridge outer frame 3 is formed with a rectangular film feed-in / opening 17 along the longitudinal direction thereof, and along the film feed-in / opening 17, the film feed-in / opening 17 is opened and closed. 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.

As shown in FIG. 6, a disc 23 having a bar code 26 is provided between one end of the spool 11 and the end surface 13 on the side opposite to the one end. The disk 23 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. The disk 23 has notches 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 F stored in the film cartridge 1, information on the number of recordable images, and the like. 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 the present embodiment, the film cartridge 1 is loaded into the cartridge chamber 33, and subsequently the opening / closing lid (not shown) for opening / closing the cartridge chamber 33 is closed. The film feeding system, that is, the so-called prewind feeding system, is wound up and set on the spool chamber 31 side, and the photographed frame is taken up and stored toward the film cartridge 1 every time one frame is finished. It is adopted.

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, there is a first motor 52 having its rotation axis 52a along a direction parallel to the vertical direction of the camera 30, that is, a direction orthogonal to the traveling direction of the film F (the left-right direction in FIGS. 1 and 2). It is provided. The rotating shaft 5 of the first motor 52
2a is rotated by the output pinion 53 fixed to the rotation shaft 52a, the reduction gear train 54 provided below the motor 52,
It is transmitted to the spool drive driver 39 via the planetary gear unit 56, a driver gear 58 that rotates integrally with the spool drive driver 39, and the like.

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 drive for normal rotation drive (clockwise drive in FIG. 2) and then spool drive for sending the film F in the film cartridge 1 to the outside and sending the tongue of the film to the spool chamber 31. Driver 39
Is driven in the reverse direction (driving in the counterclockwise direction in FIG. 2) and the spool drive driver 39 is driven in the forward direction to store the exposed film F in the film cartridge 1 after the photographing is completed ( The film rewinding drive (clockwise driving 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 from the film cartridge 1 onto the spool 31, a film winding drive, a shutter charge drive for charging the shutter of the shutter unit 50, and an up / down drive of the quick return mirror 42. And do.

Hereinafter, the first motor 52 and the second motor 60
The rotation transmission mechanism will be described in detail. First, the rotation transmission mechanism related to the first motor 52 will be described. Planetary gear part 5
6 is the final gear 5 of the reduction gear train 54 composed of a plurality of gears
4a and the sun gear 56a that meshes with the sun gear 56a
It has a planetary gear 56b that meshes with. The planetary gear 56b is rotatably provided at the other end of a rotating arm 56d whose one end is pivotally supported by a rotating shaft 56c of the sun gear 56a. 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 relay gear train 59 including a small-diameter gear 59a and a large-diameter gear 59b that meshes with the small-diameter gear 59a and the driver gear 58 is provided near the planetary gear portion 56.

When the rotary 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. The film feeding drive unit includes a first motor 52, a reduction gear train 54, a planetary gear unit 56, a driver gear 58, a spool drive driver 39, and the like.

With the above structure, when the rotary shaft 52a of the first motor 52 rotates in one direction (reverse rotation direction), the final gear 54a rotates in the clockwise direction in FIG. 2, whereby the sun gear 56a in FIG. Rotate counterclockwise. By this rotation, the rotating arm 56d rotates in the same direction and moves to the first position, whereby the planetary gear 56b rotating in the clockwise direction in the figure 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 rotary shaft 52a of the first motor 52 rotates in the other direction (normal rotation direction), the final gear 54a rotates in the counterclockwise direction in FIG. 2, which causes the sun gear 56a to rotate in the clockwise direction in the figure. Rotate. By this rotation, the rotating arm 56d rotates in the same direction and moves to the second position, whereby the planetary gear 56b rotates in the counterclockwise direction in the figure.
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 in the clockwise direction in the figure and rotates the spool drive driver 39 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 cam surface 1 of the mirror drive gear 100 is
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 that extends in the left-right direction of the camera 30 and is 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, and 70c each having a large-diameter gear portion and a small-diameter gear portion integrally coaxially, and 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. The hoisting spool drive unit includes a second motor 60, a pinion 65a, a shaft 65, a worm 65b, a reduction gear train 70, a spool gear 35a, and the like.

With the above structure, the rotating shaft 60a of the second motor 60 is in one direction (reverse direction: counterclockwise direction in FIG. 3).
When the double gear 71 rotates in the clockwise direction in FIG. 3, the sun gear 75a rotates in the counterclockwise direction in FIG. 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 to the shutter charge gear 90 and the mirror drive gear 100 via the reduction gear train 80. When the shutter is rotated, the shutter charge lever 91 moves downward to perform shutter charge,
In addition, 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 and raises the quick return mirror 42 (rotates counterclockwise in the figure around the rotation shaft 104). Incidentally, reference numeral 42 in FIG.
Reference numeral a denotes 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 rotating shaft 60a of the second motor 60 rotates in the other direction (normal rotation direction: clockwise direction in FIG. 3),
The double gear 71 rotates counterclockwise in FIG. 3, which causes the sun gear 75a to rotate clockwise in FIG. 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 and the shaft 6 to rotate.
5, the worm 65b, and the reduction gear train 70 are transmitted to the spool gear 35a.

FIG. 7 shows a circuit block provided in the camera 30. The camera 30 includes a control circuit 110 that controls overall control of the camera 30. This control circuit 1
The photosensor 112 and the pair of photoreflectors 55 a described above are electrically connected to 10. Also,
The first motor 52 and the second motor 60 are electrically connected to the control circuit 110 via motor drive ICs 114 and 115 provided in the camera 30. The magnetic head 55b described above is connected to the control circuit 110 via a magnetic writing circuit 117 provided in the camera 30.

The control circuit 110 further includes a release switch 120 interlocking with a release button 119 provided on the camera body 30; a cartridge chamber 3 of the camera 30 for detecting opening / closing of the light-shielding door 19 of the film cartridge 1.
3 a light-shielding door detection switch 122 provided in the vicinity of 3; a mirror-up detection switch 124 provided in the camera 30 for detecting completion of raising of the quick return mirror 42; and a camera 30 for detecting completion of shutter charge of the shutter unit 50. The built-in shutter charge detection switch 128 is electrically connected.

The control circuit 110 drives the first motor 52 with a pulse current when the film feeding drive is performed (P
(WM control), when the film winding drive is performed, control is performed to drive the second motor 60 with a direct current. The present invention
The control of this control circuit 110 is characteristic.

8 to 17 are flowcharts conceptually showing the operation of the camera 30 according to the present invention. The operation of the camera 30 according to the present invention will be described below with reference to the flowcharts shown in FIGS. In the motor drive control of the control unit 110 which will be described in detail below, the control unit 110 drives the first motor 52 with a pulse current only when the film feeding drive is performed, and in the other drive control, the first motor 52 or the second motor 52 is used. Control for driving the motor 60 with a direct current is performed.

Main switch of camera 30 (not shown)
When the film cartridge 1 having the unexposed (unused) film F is properly inserted into the cartridge chamber 33 in the ON state of, the opening / closing lid (not shown) of the cartridge chamber 33 is closed and locked (S1). The light shielding door 19 is opened by the driver driving mechanism (not shown) described above (S3). When the opening of the light shielding door 19 is detected through the light shielding door detection switch 122 (S5), the control circuit 11
0 drives the rotary shaft 52a of the first motor 52 in the normal direction via the motor drive IC 114 (S7), and the final gear 54
a is rotated counterclockwise in FIG. 2 by a predetermined amount, whereby the planetary gear unit 56, the reduction gear train 59, and the driver gear 5 are rotated.
2, the spool drive driver 39 is rotated clockwise in FIG. 2 to rotate the spool 11 1-2 times in the same direction (S9; disk member rotation drive). The rotation of the spool 11 causes the disc 23 to rotate together, and while the disc 23 is rotating, the control circuit 110 causes the film F included in the barcode 26 to pass through the photo sensor 112 for reading the data of the barcode 26. ISO speed information, information on the number of recordable images, etc. are read (S11).
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 circuit 110 stops the first motor 52 (S1
3). When the spool 11 is rotated in S9, the control circuit 110 causes the photo sensor 112 to drive the disc 2 to rotate.
By detecting the initial position of 3, the film cartridge 1
It is detected whether the cartridge is an unused cartridge or used (exposed or lab processed) (S15).
As a result of this detection, if the film cartridge 1 is a used cartridge, the control circuit 110 uses the loaded film cartridge 1 in the liquid crystal display section (not shown) provided in the visible portion of the camera body 30a. It is displayed that it is impossible, and thereafter, the loading control of the film F is not performed (S17). Further, as a result of the detection, if the film cartridge 1 is an unused cartridge, the control circuit 110 reversely drives the rotation shaft 52a of the first motor 52 (S19) to rotate the final gear 54a in the clockwise direction of FIG. Rotate in the direction to rotate (film feeding drive).
During this film feeding drive, the control circuit 110 pulse-drives the first motor 52 by using the current supplied to the motor drive IC 114 as a pulse current. Then, the intermittent rotation of the final gear 54a due to the pulse driving is caused by the planetary gear portion 56.
2 is transmitted to the driver gear 58 via the drive gear 58 to rotate the spool drive driver 39 in the counterclockwise direction in FIG. 2 to rotate the spool 11 in the same direction (S21) and send the film F out of the film cartridge 1 (S23). ). The delivered film F is sent toward the spool chamber 31 through between the pressure plate 55 and the aperture frame (not shown). Then, by the operations in S31 to S37 described later, the winding spool 35 catches the tongue tip of the film F and the winding spool 35 winds up the film F, and thereafter, the perforation of the film F is detected via the photo reflector 55a (S25. ) Then, the control circuit 110
Assuming that the initial feeding of the film is completed (the tongue at the leading end of the film F is securely engaged with the winding spool 35) (S27)
The motor 52 is stopped (S29). Then, it progresses to S43.

Further, the control circuit 110 drives the rotating shaft 60a of the second motor 60 in the normal direction at the same time as driving the rotating shaft 52a of the first motor 52 in the reverse direction (film feeding drive) in S19 to drive the watch in FIG. It is rotated in the rotating direction (S31; film winding drive). Then, as described above, the rotation of the rotary shaft 60a causes the double gear 71 and the planetary gear unit 7 to rotate.
5, pinion 65a, shaft 65, worm 65b,
It is transmitted to the spool gear 35a through the reduction gear train 70, and the spool gear 35a is rotated in the counterclockwise direction in FIG. 2, and thus the winding spool 35 is rotated in the same direction (S
33). When the tongue of the film F reaches the position where the tongue of the film F is engaged with the hoisting spool 35 by the operations in S19 to S23, the hoisting spool 35 catches the tongue tip of the film F (S35). Winds up the film F (S37). After that, the control circuit 11
When 0 detects that the film F is not traveling through the photo reflector 55a, that is, the winding of the film F is completed (S39), the second motor 60 is stopped (S41). After that, the process proceeds to S43. In S39, the control circuit 110 may detect the end of the winding of the film F by detecting the state in which the disk 23 is not rotating by using the photo sensor 112.

In the control relating to the operations of S19 and S31, the control circuit 110 pulse-drives the first motor 52 with a pulse current in the film feeding drive, and in the film winding drive performed simultaneously with the film feeding drive. By driving the second motor 60 with a direct current, the film winding speed by the rotation of the winding spool 35 in S33 exceeds the film feeding speed by the rotation of the spool 11 in S21 (the film winding speed). > Film feeding speed), and drive control is performed. By this drive control, the film F of the winding spool 35 in S37 is
At the time of winding (prewind), the spool 11 is rotationally driven by the rotation of the winding spool 35 due to the relationship of “film winding speed> film feeding speed”.

At this time, since the peripheral speed of the driver gear 58 that rotates integrally with the spool 11 exceeds the peripheral speed of the planet gear 56b that is rotationally driven by the pulse-driven first motor 52, the planet gear 56b is FIG. 2 of the gear 56a
While rotating in the clockwise direction in the figure by the rotation in the counterclockwise direction, the driver gear 58 causes the sun gear 5 to rotate.
Around 6a is flipped clockwise in FIG. Immediately after being flipped, the planetary gear 56b is moved around the sun gear 56a in the counterclockwise direction of FIG. 2 by the rotation of the sun gear 56a in the counterclockwise direction of FIG.
Trying to mesh with 8. However, since the peripheral speed of the driver gear 58 exceeds the peripheral speed of the planet gear 56b, the planet gear 56b is repelled by the driver gear 58. That is, the planetary gear 5 that rotates clockwise in FIG.
6b is repelled by the driver gear 58 having a peripheral speed higher than that of the planetary gear 56b, so that the sun gear 5b.
The rotation around 6a is revolved alternately in the clockwise direction and the counterclockwise direction in FIG. The operation in which the planet gear 56b is repeatedly flipped by the driver gear 58 is performed during the film F winding operation (during prewind) in S37, and S2 is performed.
The operation is ended by stopping the first motor 52 at 9. This S2
When the first motor 52 stops at 9, the driver gear 58 of the planetary gear 56b stops its operation, and the planetary gear 56b stops.
b stops at a neutral position where it does not mesh with either the driver gear 58 or the small diameter gear 59a.

In S43, the control circuit 110 drives the rotating shaft 52a of the first motor 52 to rotate in the normal direction to rotate the spool 11 in the winding direction (S45), and winds the film F into the film cartridge 1. Then, when it is detected that the first frame (first shooting frame) of the film F is located at a predetermined position corresponding to the aperture through the photo reflector 55a (S47), the first motor 52 is turned on. Stop (S49; film loading completed).

After the film loading is completed, when the photographer presses the release button 119 of the camera 30 (turns on the release switch 120) (S51), the control circuit 110 is activated.
Drives the rotation shaft 60a of the second motor 60 in reverse (S5
3) Then, the hold of the shutter charge of the shutter drive mechanism section 50b is released (S55). Rotating shaft 60a
As described above, the double gear 71,
Sun gear 75a, rotating arm 75d, planetary gear 75b,
The mirror drive gear 100 rotates via the reduction gear train 80, the shutter charge gear 90, and the roller 10 is rotated by the mirror up cam 100c of the mirror drive gear 100.
3d is raised, and the quick return mirror 42 is raised via the mirror drive lever 103 and the mirror sheet pin 105 (S57; up drive of the quick return mirror). When the mirror-up detection switch 124 detects that the quick return mirror 42 has been raised (S59), the control circuit 110 stops the second motor 60 (S61),
Immediately after that, the shutter drive mechanism unit 50b is driven to perform exposure (S63; first frame shooting).

After the completion of this exposure, the control circuit 110 makes the second
The rotating shaft 60a of the motor 60 is again driven in reverse (S6
5), the mirror drive gear 100 is rotated to lower the quick return mirror 42 (S67; down drive of the quick return mirror), and at the same time, by the rotation of the shutter charge gear 90, the shutter charge cam 90c pushes down the roller 91e, and the shutter is released. Charge lever 91
The shutter charge is performed via (S69; shutter charge drive). When shutter charge is completed (S
71), the control circuit 110 stops the second motor 60 (S73). After the completion of the exposure in S63, the control circuit 110 drives the rotation shaft 52a of the first motor 52 in the normal direction at the same time as the reverse rotation of the rotation shaft 60a of the second motor 60 in S65 (S75). The film F is rotated in the winding direction (S77) and the film F is wound into the film cartridge 1 (film rewinding drive), and during this winding, an image of this one frame is exposed on the exposed first magnetic recording layer. Data (shutter speed, aperture value, subject brightness information, strobe use / non-use information, shooting date / time, etc.) is recorded via the magnetic head 55b (S78), and one frame of film F is sent to the film cartridge 1. When it is detected via the photo reflector 55a (S79), the first motor 52 is stopped (S81). This completes the setting of the second frame. After that, when the release button 119 is pressed (S83), the operations after S53 are repeated. If the exposure operation in S63 is the exposure operation of the final frame of the film F, the operation proceeds from S63 to S85.

The operation from S85 to S93 shown in FIG. 13 is the same as the operation from S65 to S73. S6
After the exposure is completed in 3, the control circuit 110 drives the rotating shaft 52a of the first motor 52 in the normal direction at the same time as the rotating shaft 60a of the second motor 60 in the reverse rotation driving in S85 (S95) and winds the spool 11. The film F is wound in the film cartridge 1 by rotating in the take-up direction (S97), and during this winding, the photographing information of the last frame is exposed on the magnetic recording layer of the last frame exposed through the magnetic head 55b. Recorded (S
98) thereafter, if the perforation of the film F is not detected for a certain period of time via the photo reflector 55a, or if all the predetermined number of frames are photographed (S
99), the control circuit 110 controls the rotation shaft 5 of the first motor 52.
The film F is completely wound into the film cartridge by continuously driving the 2a in the forward direction for a certain period of time (S101). After the lapse of this fixed time, the control circuit 110 stops the first motor 52 (S103). After that, the photographer makes a spool room 33
When the lock of the open / close lid (not shown) is released (S10
5) With this release, the light-shielding door 19 of the film cartridge 1 is closed by the driver driving mechanism (not shown) described above (S107). In this state, the cartridge chamber 33
The film cartridge 1 can be taken out from (S109).

As described above, the camera 3 to which the present invention is applied
At 0, during the prewind in S37, the control circuit 11
By controlling the drive of the first motor 52 and the second motor 60 of 0, the relation of "feeding speed by the film feeding driving unit <winding speed by the winding spool driving unit" is achieved, and therefore the film feeding driving unit and the winding There is no need for a conventional structure that mechanically connects the spool drive.

Although the camera 30 of this embodiment employs the prewind feeding method as the film feeding method, 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 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 a film cartridge of another type.

Further, although the camera 30 of the above embodiment uses the film cartridge having the film having the magnetic recording layer as the film cartridge to be used, the film cartridge having the film having no magnetic recording layer is used. It is also possible to do so.

[0052]

As described above, according to the electric single-lens reflex camera of the present invention, the control means drives the first motor with a pulse current when performing film feeding drive, and when performing film rewinding drive. Is configured to be driven by direct current, so
A film feeding drive unit that does not require a conventional structure for mechanically connecting the film feeding drive unit and the winding spool driving unit, and thus has a simple structure and space saving, and can perform efficient film feeding. It is possible to provide an electric camera equipped with.

[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 the internal structure 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.

7 is a circuit diagram of the electric single-lens reflex camera shown in FIG.

FIG. 8 is a flowchart conceptually showing the operation of the electric single-lens reflex camera shown in FIG. 1 according to the present invention.

FIG. 9 is a flowchart conceptually showing the operation of the electric single-lens reflex camera shown in FIG. 1 according to the present invention.

10 is a flow chart diagram conceptually showing the operation of the electric single-lens reflex camera shown in FIG. 1 according to the present invention.

FIG. 11 is a flowchart conceptually showing the operation of the electric single-lens reflex camera shown in FIG. 1 according to the present invention.

12 is a flowchart conceptually showing the operation of the electric single-lens reflex camera shown in FIG. 1 according to the present invention.

FIG. 13 is a flowchart conceptually showing the operation of the electric single-lens reflex camera shown in FIG. 1 according to the present invention.

[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 circuit 112 Photo sensor 119 Release button

Claims (4)

[Claims] 1. In a camera using a film cartridge containing a spool around which a film is wound, a cartridge chamber for accommodating the film cartridge; and a hoist for winding up the film sent from the inside of the film cartridge to the outside. A spool chamber having a spool inside; a film delivery for delivering the film wound on the spool to the outside by rotating the spool in one direction after the film cartridge is loaded into the cartridge chamber Drive,
A film rewinding drive for rotating the spool in the other direction to wind the film into the film cartridge.
A motor; a second motor for performing film winding drive for rotating the winding spool to wind up a film delivered from the inside of the film cartridge by the film delivery drive of the first motor; the first motor; A control means for controlling the drive of the second motor, the control means driving the first motor with a pulse current when the film feeding drive is performed, and a direct current when the film rewinding drive is performed. An electric camera characterized by being driven by electric current. 2. The electric camera according to claim 1, wherein the control means controls the second motor by a direct current when the film winding drive is performed. 3. The electric camera according to claim 1, wherein the second motor further performs shutter charge driving and up / down driving of the quick return mirror. 4. The film cartridge according to claim 1, wherein the film cartridge has a disk member that rotates together with the spool and has a bar code formed along the circumferential direction, and the electric camera further comprises: A reading means for reading the information of the bar code, and the first motor further performs a disk member rotational drive for rotating the spool to rotate the disk member so that the reading means reads the bar code information. Electric camera.