JPS6158017B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a motor-driven camera in which film winding and rewinding are performed by a motor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a motor-driven camera which has a simple structure and can selectively and reliably wind and rewind a film using a single motor.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In Fig. 1, which shows the camera body removed, reference numeral 1 indicates a spool for winding a film rotatably supported on the camera body, and a spool gear 2 is coaxially attached below this spool through a shaft. has been done. Further, a spool plate 3 is provided below the gear 2, and the center thereof is pivotally supported by the camera body so that the spool plate 3 can swing in the horizontal direction. A pivot pin 4 is provided at the other end. Further, a tension spring 5 is connected near the other end for urging the spool plate 3 to rotate counterclockwise in the figure. The pivot pin 4 is loosely inserted into one end of a horizontally extending interlocking plate 6, so that the interlocking plate 6 is displaced as the spool plate 3 swings. Reference numeral 7 in the figure indicates an intermediate gear provided opposite to the spool gear 2 with a predetermined interval therebetween;
A swing gear 8 rotatably supported by a laterally extending arm portion of the spool plate 3 by a shaft 8a is located between the gears 2 and 7. This swing gear 8
When the spool plate 3 is rotated counterclockwise by the spring 5, the spool plate 3 rotates together and meshes with both gears 2 and 7, thereby operatively connecting these gears 2 and 7. A spool pawl 9 is pivotally supported at the center of the shaft 8a so as to be able to swing horizontally, and a tension spring 10 and a tension spring 10 are provided at the base of the spool pawl 9 to bias the spool pawl 9 counterclockwise. A magnet 11 is provided for holding the spool pawl 9 at a predetermined position rotated clockwise against the biasing force of the spring 10. The magnets used in this device are all permanent magnets with coils wound around them so that they also function as electromagnets. The spool claw 9 is provided with an arm extending laterally at the center thereof, and one side of this arm comes into contact with a regulation pin 12 fixed to the camera body, thereby controlling the movement of the spool claw 9. regulated. An interlocking shaft 13 extending substantially parallel to the interlocking plate 6
is rotatably supported on the camera body. Near one end of this interlocking shaft 13, a worm gear 14 which is always in mesh with the intermediate gear 7 and the tip of the spool pawl 9 are engaged, and when the interlocking shaft 13 is rotating clockwise, this A rotary claw 15 that displaces the spool claw 9 in the proximal direction is coaxially fixed. Further, this interlocking shaft 13 is selectively rotated by a motor 16 via a clutch mechanism.
A drive gear 17 that rotates this interlocking shaft 13 is coaxially fixed. That is, a pinion gear 18 is fixed coaxially to the rotating shaft 16a of the motor 16, and an intermediate gear 19 is interposed between this gear 18 and the drive gear 17. This intermediate gear 19 is connected to the rotating shaft 16 of the motor 16.
The center portion of the clutch plate 20 is rotatably supported by the first arm portion of the clutch plate 20, which has three arm portions projecting radially in three directions. Thus, the pinion gear 18 serves as a sun gear, and the intermediate gear 19 operates as a planetary gear, and when the motor 16 is rotated counterclockwise, the intermediate gear 19 is revolved and rotated around the sun gear by the pinion gear 18. It meshes with the drive gear 17 to rotate it counterclockwise. Note that this counterclockwise revolution of the intermediate gear 19 occurs only when the first release is performed, and at the time of subsequent releases, the intermediate gear 19 has already rotated.
is in mesh with the drive gear 17, so only rotation takes place. Reference numeral 21 indicates a magnet, and the clutch plate 2
This is for attracting and holding the second arm portion of the clutch plate 20 at a predetermined position rotated counterclockwise from 0, that is, at a position where the intermediate gear 19 meshes with the drive gear 17. In the figure, reference numeral 22 denotes a release plate whose center part is pivoted on the camera body and can swing in the horizontal direction, and one end 22a of this is engaged with the engagement claw 3a of the spool plate 3 as shown in FIG. 2A. At the same time, the spool plate 3 is rotated clockwise against the biasing force of the spring 5 to a first position and a second position where the engagement is released as shown in FIG. 2B. Let me have it.

In the film winding mechanism constructed as described above, the winding operation is performed when the motor 16 is rotated clockwise while the spool plate 3 is held at the second position. That is, when the motor 16 is rotated clockwise, the interlocking shaft 13 is rotated clockwise via the planetary gear mechanism (pinion gear 18 and intermediate gear 19) and the drive gear 17, and the worm gear 14, intermediate gear 7, and the oscillating shaft are rotated clockwise. The spool gear 2 is rotated via the gear 8 to wind up the film.

Incidentally, reference numeral 23 in the figure indicates the third portion of the clutch plate 20.
An intermediate gear 24 which is rotatably supported on the arm portion of the pinion gear 18 and serves as a planetary gear of the pinion gear 18, and a reference numeral 24, are connected to the gear 23 when the intermediate gear 23 is swung clockwise via the clutch plate 20. This is a drive gear that meshes with each other to operate a film rewinding mechanism, which will be described later.

The interlocking shaft 13 has a drive gear 2 for rotating the mirror.
5 are fixed coaxially, and a substantially V-shaped clutch plate 26 is pivotally supported at its center.
A swing gear 27 is rotatably supported at one end of the clutch plate 26 by a pivot pin 26a, and this gear 27 is always in mesh with the drive gear 25. As a result, the swing gear 27 constitutes a planetary gear with the drive gear 25 as a sun gear, and is capable of revolution and rotation by the rotation of the drive gear 25. And this swing gear 27
A rotating body 28 having a gear groove 28a around the periphery is provided so as to face the rotating body 28. This rotating body 2
8 is supported by the camera body so as to mesh with the swing gear 27 when the swing gear 27 is rotated clockwise and to be rotated by the rotational force of the drive gear 25. Further, an engaging protrusion 28b is provided on one side of the rotating body 28, and this engages the pivot pin 28b.
3A, the swing gear 27 does not mesh with the gear groove 28a of the rotating body 28. The counterclockwise rotation of the drive gear 25 causes the swing gear 27 to rotate clockwise, and due to frictional engagement therewith, the engagement claw 29 moves clockwise against the force of the tension springs 31 and 32. , and when the lever 30 rotates counterclockwise, the engaging protrusion 28b engages with these.
When the engagement with the rotating body 28 is released, the rotating body 28 meshes with the swing gear 27 and is rotated counterclockwise. The rotating body 28 is provided with means for rotating the mirror support frame, means for rotating the mirror, and means for driving the diaphragm mechanism as will be described later. There is.

In the figure, the rear end side of the mirror designated by reference numeral 33 is rotatably supported by the mirror support frame 34 from both sides. This mirror support frame 34 is a U-shaped main body 34.
a, and a leg 34b hanging down from one end of the main body 34a at a substantially right angle.
The mirror 33 is supported near the rear end of the mirror 33. The support frame 34 is swingably supported by the camera body and the support fittings 35 at both ends of the body 34a. Legs 34 of the support frame 34
An engagement pin 36 extending substantially horizontally is provided near the lower end of b. On the other hand, the rotating body 28
A cam groove 28c is formed on the side surface of the mirror support frame 34, and as the engaging pin 36 is engaged with the cam groove 28c, the mirror support frame 34 is moved relative to the camera body as the rotating body 28 rotates. rotated vertically. Note that only the first portion of the cam groove 28c is formed to be offset from the center of the rotating body 28, so that the mirror support frame 34 is rotated counterclockwise only at the beginning of the rotation of the rotating body 28. be moved.

The mirror 33 is provided with a mechanism for adjusting its position from the front of the mirror box. That is, a pair of vertical elongated holes are formed in the support metal fitting 35 that pivotally supports the other front end of the support frame main body 34a, and the metal fitting 35 is fixed to the mirror box through these holes so as to be vertically adjustable with screws 37. As a result, the horizontality of the support frame 34, that is, the mirror 33 in the rotation axis direction is adjusted. Further, the tip of an adjustment screw 38 screwed in from the front side of the mirror box is in contact with the lower end of the leg portion 34b of the support frame 34, and the front and rear positions of the support frame 34 and thus the mirror 33 are adjusted by this screw. be done. The amount of rotation of the mirror 33 through 45 degrees is adjusted by an adjustment screw 39 screwed in from the front of the mirror box. That is, the mirror positioning lever 4 is approximately V-shaped.
0 is pivoted to the camera body at its center so as to be vertically swingable, and one end of this is connected to the adjustment screw 3.
A pin 41 is provided at the other end of the mirror, which is in contact with the tip of the mirror 9 and extends downward from the other end of the mirror. This pin 41 is set when the mirror 33 is in the lowered position.
That is, when the mirror 33 is at the 45° position, it comes into contact with the lower surface of the mirror 33 and prevents further rotation of the mirror 33. A tension spring 42 is connected to this lever 40, and when the mirror 33 is lowered, this comes into contact with a pin 41, elastically preventing the lever 40 from rotating clockwise. There is.

A driving pin 28d for rotating the mirror 33 is provided protruding from the side surface of the rotating body 28. This drive pin 28d is engaged with a cam groove 43a of a cam plate 43 attached to one side of the mirror 33, and when the drive pin 28d is rotated with the rotation of the rotating body 28, the cam is rotated. Mirror 33 via plate 43
is rotated. Note that the cam groove 4 of this cam plate 43
3a is designed so that the mirror 33 does not rotate in the latter half of the counterclockwise rotation of the rotating body 28 even though the rotating body 28 is rotating.

In FIG. 4A, reference numerals 44 and 45 indicate spring pieces, and the first spring piece 44 is the rotating body 2.
The second spring piece 45 is attached near the front end of the cam groove 43a of the cam piece 43. Thus, when the mirror 33 is in the lowered position, the engagement pin 36 is elastically supported by the first spring piece 44, making it more reliable to hold the support frame 34 in that position, while the mirror 33 is in the lowered position. Sometimes the pin 28d is connected to the second spring piece 45.
is elastically supported.

A drive pin 28e for operating the aperture mechanism is also protruded from one side of the rotating body 28.
This pin 28e is engaged with a cam groove 46a formed at the base end of the aperture plate 46, and this pin 28e
The rotation of the aperture plate 46 displaces the aperture plate 46, and the aperture ring 47 attached to the tip thereof is rotated to control the aperture mechanism. The cam groove 46a of the aperture plate 46 is designed so that the aperture plate 46 is displaced only in the latter half of the counterclockwise rotation of the rotating body 28.

The rotating body 28 is provided with a mechanism for stopping the rotation of the rotating body 28 when its counterclockwise rotation reaches a predetermined amount. That is, an engaging pawl 48 is rotatably provided above the rotary body 28, and the tip of the pawl 48 engages with the gear groove 28a of the rotary body 28 to stop the rotary body 28. It's summery. At the base end of this engaging claw 48,
A tension spring 49 that biases the claw 48 to rotate in the engaging direction, and a magnet 50 that attracts and holds the engaging claw 48 in a non-engaging position against the biasing force of the spring 49 are provided. . On the other hand, a plurality of through holes 28f are formed in one side of the rotating body 28 and arranged along the circumferential direction thereof, and on both sides of the rotating body 28, as shown in FIGS. As shown in FIG. 4C, a light emitting element (LED) 51 and a light receiving element (SBC) 52 are provided so as to face each other with the rotating body 28 in between. The light emitting element 51 and the light receiving element 52 are designed to optically detect the first one of the through holes 28f when the rotating body 28 rotates and the mirror 33 is brought to the raised position. When a predetermined number of through holes 28f are detected, the drive of the motor 16 is stopped via an electric circuit (not shown), and the magnet 5 is stopped.
0 is deenergized to enable rotation of the engaging claw 48, thereby stopping the rotating body 28.

A beam and a light mechanism are provided between the mirror support frame 34 and the shutter curtain 53. This dimming mechanism is provided near the film exposure aperture, and presses the shutter curtain 53 against the surface of the film 54 when the shutter curtain 53 is not running to prevent light from entering the film surface from the exposure aperture. It is.

This blind light mechanism includes an upper blind light plate 55 extending along the upper edge of the exposure aperture and a lower bright light plate 56 extending along the lower edge. Korashiya light plate 5
5 and 56 have an L-shaped cross section, and are provided such that their vertical plate portions 55a and 56a are located on the shutter curtain 53 side, and their horizontal plate portions are located on the upper and lower sides, respectively. In addition, these light plates 5
5 and 56 are pivotally supported on the camera body at both ends thereof, and are connected to each other by connecting levers 55b and 56b.
It is supported by Therefore, when the upper light plate 55 is rotated in one direction, the connecting lever 5
5b and 56b, the lower light plate 56 is rotated in the other direction. In addition, in the figure, reference numeral 57 indicates that the pivot portions of the connecting levers 55b, 56b are pulled in the direction of the shutter curtain 53, and the vertical plate portions 5 of the light plates 56, 56 are pulled together.
5a and 56a are shown as tension springs that press against the shutter curtain 53 to achieve a dimming effect. Further, the base end of the mirror support frame main body 34a is located near the lower surface of the horizontal plate portion of the upper light plate 55, and when the support frame 34 is rotated counterclockwise as described above, The base end of the shutter curtain 53 presses the upper shutter light plate 55 upward to rotate the shutter curtain 55 clockwise against the biasing force of the spring 57, and the pressure on the shutter curtain 53 is released. In other words, the shading light mechanism is released from its shading operation when the mirror 33 rotates.

In the figure, reference numerals 58 and 59 indicate a front curtain tube and a rear curtain tube, respectively, which are controlled by a shutter drive mechanism described below.

This drive mechanism has a worm gear 60 coaxially fixed to the other end of the interlocking shaft 13. An intermediate gear 61 rotatably supported by the camera body is meshed with the worm gear 60, and a large gear 62 for shutter charge is meshed with the intermediate gear 61, respectively. Further, the large gear 62 meshes with a front pinion gear 63 and a rear pinion gear 64, which are disposed coaxially below the front curtain tube 58 and the rear curtain tube 59. These pinion gears 63, 64 are rotatably supported on the free end of an elastic clutch plate 65 whose base end is fixed to the camera body. The other end of the V-shaped clutch plate 26 is pivotally supported on the upper center surface of the clutch plate 65 by a horizontal pin, so that when the latter clutch plate 26 is rotated clockwise, the former clutch plate 26 is rotated clockwise. The plate 65 is rotated, and both pinion gears 6
3 and 64 are displaced downward away from the front curtain tube 58 and the rear curtain tube 59. Drive pins 63a, 64a are provided on the upper surfaces of both pinion gears 63, 64.
are eccentrically protruding from each other, while the drive pin 6 is provided on the lower surface of the front curtain tube 58 and the rear curtain tube 59.
The driven pin 58 corresponds to 3a and 64a.
a, 59a are provided protrudingly. These driven pins 5
8a, 59a and drive pins 63a, 64a are engaged with each other when the pinion gears 63, 64 are in the upper position as shown in FIG. 5A, and are disengaged when they are in the lower position as shown in FIG. 5B. Ru.
When in the engaged state, the drive worm gear 60 is rotated by the clockwise drive of the motor 16, and when both pinion gears 63, 64 are rotated counterclockwise via the gears 61, 62, the drive pins 63a, 64 are rotated.
a and the curtain tube 58 via the driven pins 58a and 59a,
59 is rotated in the same direction to wind up the shutter curtain 53. On the other hand, when the shutter curtain 53 is not engaged, the rotation of the shutter curtains 58 and 59 due to the movement of the shutter curtain 53 is not transmitted to the pinion gears 63 and 64. In the figure, reference numerals 66 and 67 indicate front claws and rear claws, respectively, which are rotatably supported on the camera body. The rotation of these parts is prevented by engaging with each other. The engagement of these claws 66, 67 is maintained by magnets 68, 69 provided near these proximal ends attracting them, and when these magnets 68, 69 are deenergized, tension springs 70, 71 The engagement is released by the action of .

In the focal plane shutter drive mechanism described above, when the motor 16, which has been rotationally driven in the counterclockwise direction by the release operation, is stopped by the light detection mechanism (the light emitting element 51 and the light receiving element 52), first one of the magnets 68 is deenergized, the engagement of the front claw 66 is released, and the leading curtain travels, and subsequently, the other magnet 69 is also deenergized, the engagement of the rear claw 67 is released, and the trailing curtain travels, and the shutter is started. The action is accomplished. After the motor 16 is rotated clockwise, the shutter curtain is wound up when the pinion gears 63, 64 are brought to the upper position via the clutch plates 26, 65.

Note that the release plate 2 is located near the base end of the rear claw 67.
2, and when the rear pawl 67 is rotated in the disengagement direction, the release plate 22 is rotated clockwise against the biasing force of the tension spring 72 to release the other end of the release plate 22. 22a and the engaging claw 3a are released, and the film winding operation described above is performed.

A long hole 6a extending along the longitudinal direction is formed near the other end of the interlocking plate 6, one end of which is pivotally supported by the spool plate 3. A stop lever 7 extending almost orthogonally
A pin 73a protruding from the lower surface of 3 is loosely inserted. An elongated hole is formed near the base end of the stop lever 73, into which a fixing pin 74 protruding from the camera body is loosely inserted. Further, a tension spring 75 is connected to this proximal end for biasing the stop lever 73 in the proximal direction. On the other hand, an engaging portion 73b is formed at the tip of the stop lever 73, and a tension spring 76 for biasing the lever 73 to rotate clockwise is connected thereto. Further, a motor power switch 77 is provided near the tip of this stop lever 73, and when this lever 73 is displaced toward the tip against the biasing force of the spring 75, the motor 16 is powered on via this switch 77. rotation is stopped. The engaging portion 73b of the stop lever 73 faces an engaging piece 62a provided protruding from the lower surface of the large gear 62 of the shutter drive mechanism. The stop lever 73 is
When the interlocking plate 6 is displaced toward the other end by the spool plate 3, it is rotated clockwise via the pin 73a in the long hole 6a, and when the large gear 62 is rotated clockwise, the As shown in FIG. 5B, the engaging piece 62a engages with the engaging portion 73b to stop the rotation of the large gear 62. When the engagement piece 62a and the engagement portion 73b are engaged, the stop lever 73 is displaced by the engagement piece 62a, and the above-mentioned switch 7
7 is performed.

Next, a film rewinding mechanism driven by the motor 16 via the drive gear 24 will be explained.

The drive gear 24 is coaxially fixed to one end of a horizontally extending connecting shaft 78.
A worm gear 79 is coaxially fixed to the other end, and a sun gear 80 rotatably supported on the camera body meshes with this. This sun gear 80
A planetary gear 8 is rotatably supported at the tip of a connecting lever 81 whose base end is pivotally supported coaxially with the planetary gear 8.
2 are in mesh. And this planetary gear 82
faces a gear groove 84 formed on the circumferential side of a cartridge claw 83 rotatably protruding from the camera body. Thus, when the worm gear 79 is rotated clockwise, the planetary gear 82 revolves through the sun gear 80 and meshes with the gear groove 84, and by rotating the cartridge pawl 83 counterclockwise, the film is rotated. Rewinding is performed. Reference numeral 85 in the figure indicates a tension spring connected to the connecting lever 81, which rotates the connecting lever 81 clockwise to separate the planetary gear 82 from the gear groove 84 when the worm gear 79 stops rotating. do.

The cartridge claw 83 of the film rewinding mechanism is actually attached to the camera body as shown in FIGS. 6 and 6B.

That is, the gear groove 84 formed in the shaft portion of the cartridge claw 83 has approximately the same outer diameter as the gear groove 84, and a pair of engagement protrusions 83a are provided on the outer periphery near the base end of the cartridge claw 83. They are protruded at a distance of 180° from each other. The proximal end of the cartridge claw 83 protrudes from the camera body as shown in FIG. 6B, and a clutch cylinder 86 is attached to this protruding end.
are fitted coaxially. This clutch cylinder 86
The front part of the center hole has an inner diameter that is approximately the same size as the outer diameter of the shaft of the patrone claw 83, and the rear part has an inner diameter that is approximately the same size as the outer diameter including the engaging protrusion 83a. A pair of grooves 86 are provided on the front peripheral wall of the center hole for allowing the engagement protrusion 83a to pass through.
a is formed. In the figure, reference numeral 87 is a set screw that is screwed to the protruding end of the cartridge claw 83 to prevent the clutch tube 86 from coming off, and 88 is a set screw that is fitted onto the clutch tube 86 and whose peripheral wall is pressed into contact with the camera body. 91 is a spring that selectively engages with a pair of engagement grooves formed in the peripheral wall of the cartridge claw 83. shows.

In the above structure, in the state shown in FIG. 6B in which the engaging protrusion 83a of the cartridge pawl 83 and the groove 86a of the clutch tube 86 are not engaged, the cartridge pawl 83 is rotated by the motor 16 to rewind the film. It can be done. When it becomes impossible to drive the motor 16 for some reason, the knob 88 is manually pulled to engage the engagement protrusion 83a with the groove 86a, and in this state, the knob 88 is pulled. By rotating the child 88, the clutch cylinder 86
The cartridge claw 83 is rotated through the film to rewind the film.

In FIG. 1, numerals 89 and 90 indicate the film 54.
a light emitting element (LED) and a light receiving element for optically detecting the perforation 54a of the film, demagnetizing the magnet 11 when the film has been wound by one frame, and rotating the spool claw 9 counterclockwise; (SBC). These photodetectors (light emitting element 8
9 and light receiving element 90), the film winding operation is terminated when a predetermined number (for example, eight) of perforations 54a are detected to have passed. However, when the predetermined number is not counted, the magnet 21 is deenergized and the rotational driving force of the motor 16 is transmitted to the film rewinding mechanism to perform the above-mentioned rewinding action.

The clutch mechanism of the motor 16 for operating the film rewinding mechanism has two arm portions 20a and 20b on a clutch plate 20, as shown in FIG. 7A.
Friction members 20c and 20d made of rubber are provided on one side of these arm portions 20a and 20b.
By providing the clutch plates 20 so as to selectively contact the gears 17 and 24, the position of the clutch plate 20 can be stably maintained. That is, when one intermediate gear 23 is in mesh with one drive gear 24, one friction member 20c is pressed against the other drive gear 17,
Further, the other friction member 20d is connected to the other intermediate gear 1.
When gear 9 is in mesh with the other drive gear 17,
It is in pressure contact with one of the drive gears 24 to prevent unnecessary rocking of the clutch plate 20 at each position.
The clutch mechanism is designed to rotate automatically, but as shown in FIG. 7B, the other end of an operating lever 91, one end of which extends outward from the camera body, is pivoted to the clutch plate 20. However, it may be manually rotated from the outside.

Reference numeral 92 in FIG. 1 indicates a cartridge detection switch, and since this camera has additional parts not shown in addition to the basic configuration explained above, the overall operation including these parts will be explained below. Explain.

When a film is loaded and the lid of the camera body is closed, the cartridge closes the switch 92 and 0 is displayed on the cartridge mark counter. At this time, the power supply voltage is also checked, and if the voltage is low, a flash is displayed on the display panel. If there is no abnormality in the power supply, power flows to the motor 16 and the rotating shaft 16a is rotated.
As a result, even if the intermediate gear 19 and the drive gear 17 are not meshed, the intermediate gear 19 will revolve and mesh with the drive gear 17, thereby transmitting rotation. In this state, the clutch plate 20 is attracted to the magnet 21 and its position is maintained. As a result, the film is wound, and when the shutter is wound, the motor 16 is automatically reversed and the shutter is turned off. This continues until the photodetection mechanism detects 16 perforations 54a, that is, until the film 54 has been advanced by two frames. If a sound signal is generated every time the perforation 54a of the film 54 is detected,
It's convenient. After two frames of film have been fed in this manner, the camera enters a release standby state. However, if the winding of the film is completed or if due to some accident the film is not advanced by one frame for a predetermined period of time (for example, about 10 seconds), the magnet 21 is deenergized and the motor 16 is reversed. As a result, intermediate gear 2
3 is meshed with the drive gear 24, so the film 54
is rewound and a predetermined number of perforations 54a
When detected, the current supply to the motor 16 is cut off (also at this time, a buzzer is sounded via the photodetection mechanism), and the frame number display on the counter is turned off. Then, if you remove the cartridge, Switch 9 will appear.
2 is opened and the patrone mark disappears.

On the other hand, when the light detection mechanism detects eight perforations 54a during normal winding, the magnet 1
1 is deenergized, the swing gear 8 is separated from the intermediate gear 7, and winding of the film 54 is completed. The winding of the shutter is also completed, and the switch 77 turns off the power to the motor 16. When the release button is pressed in the standby state, the motor 16 is rotated counterclockwise and the voltage check is performed. By driving this motor 16, the mirror 33 starts to rise via the mirror drive mechanism. After this mirror 33 reaches the uppermost position, the diaphragm mechanism starts to stop down, and the photodetection mechanism (the light emitting element 51 and the light receiving element 52) starts counting (FIG. 4B). At this time, when the aperture is brighter than the aperture, the aperture is determined at the aperture position, and when it is darker than the final aperture of the lens, the aperture is determined at the minimum aperture position. Then, when a predetermined aperture is reached, the magnet 50 is deenergized and the rotation of the rotating body 28 is stopped, and
The current supply to the motor 16 is cut off. Also, at this time, the magnet 68 is deenergized and the leading curtain starts running. Then, when the screen becomes open, the X contact closes, and this signal is input to the control circuit. Next, it is compared with a trailing curtain travel signal calculated by another circuit, and if the X contact is faster, an X contact signal is output. In this case, it is also possible to compare the difference with the X contact point several milliseconds after the trailing curtain starts running. In this case, the strobe when the X contact is engaged may be performed using an exposure calculation and a separate light receiving section. When the magnet 69 is deenergized, the rear curtain runs, and when the shutter operation is completed, the motor 16 is energized again and rotated in the opposite direction, that is, clockwise, to lower the mirror 33, wind the film 54, and turn the shutter. Winding is performed.

In the device of the above embodiment, when the photodetection mechanism that detects the rotation of the rotary body 28 detects a hole before a predetermined number of holes 28f, for example, three holes before, the current supply to the motor 16 is stopped. By reducing the number, it is possible to reduce the shock when the motor 16 and rotating body 28 stop. Furthermore, the concept of reducing the current supply to the motor 16 before it is cut off can also be applied to film winding and rewinding.

The camera configured as described above has the following effects.

(1) Since all main mechanisms are automatically operated by a single motor installed at the bottom of the mirror, space is required and costs can be reduced.

(2) No need for unnecessary force such as a spool spring to drive the spool.

(3) Since the film is automatically rewound, this operation becomes easier.

(4) Since the main mechanisms are automatically driven by motors at predetermined timings, wasted time is reduced and operation speed is increased.

(5) Since a gear-based release mechanism is used, the force applied to the stopper can be reduced.

(6) Since the main mechanisms are made to operate in parallel as much as possible, wasted operating time can be eliminated.

(7) Since no sprocket is required, space can be reduced and the camera can be made more compact.

(8) A 4-hour shutter can be used without difficulty.

(9) The overall structure has fewer shots.

(10) Dual auto can be performed with a simple mechanism.

(11) The width of the shutter curtain can be made narrower by adopting the shutter light mechanism.

(12) Mirror position can be adjusted from outside the camera.

(13) Since rewinding is always free,
It requires less winding power.

(14) Film rewinding can be performed selectively by motor drive or manually, so it is safe from any kind of accident.

(15) Since the aperture is activated after the mirror has risen, the aperture operation is stable, and the shutter is activated at this time, so there is less blurring.

(16) Since the engagement between the pinion of the shutter drive mechanism and the curtain tube is released in conjunction with the mirror drive, the shutter operation is ensured.

As explained above, the motor-driven camera of the present invention uses a planetary gear mechanism to switch the connection between the film winding drive gear and the film rewind drive gear to the motor and to transmit the rotational force from the motor. Therefore, the configuration is easy,
Its operation is reliable.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention with the camera body removed, FIGS. 2A and 2B are perspective views showing different states of the film winding mechanism, and FIGS. 3A and 3B are mirror views. FIGS. 4A to 4C are perspective views showing different rotational positions of the rotating body; FIGS. 5A and 5B are perspective views showing different states of the shutter drive mechanism; FIGS. 6A and 6B are exploded perspective views and sectional views of the film rewinding mechanism, and FIGS. 7A and 7B are perspective views showing different modifications of the motor clutch mechanism. 1... Spool, 2... Spool gear, 7...
Intermediate gear, 8... Swing gear, 14... Worm gear, 16... Motor, 17... Drive gear, 18
... Pinion gear, 19 ... Intermediate gear, 20 ...
Clutch plate, 21... magnet, 23... intermediate gear,
24... Drive gear, 54... Film, 20a...
...Arm part, 20b...Arm part, 20c...Friction member, 20d...Friction member, 91...Operation lever.

Claims (1)

[Claims] 1. A sun gear 18 which is rotationally driven by a reciprocating motor, rotates in one direction when the release button is pressed, and rotates in the other direction when winding the film and rewinding the film. , a clutch plate 20 frictionally coupled to the sun gear 18, planetary gears 19, 23 meshing with the sun gear 18 and pivotally supported by the clutch plate 20, and the sun gear 18 rotating in one direction. , when the planetary gears 19 and 23 revolve while rotating in one direction,
When the film winding mechanism drive gear 17 meshing with this planetary gear and the sun gear 18 rotate in the other direction, and the planetary gears 19 and 23 revolve while rotating in the other direction,
The film rewinding mechanism driving gear 24 meshing with the planetary gear and the clutch plate 20 are held together by suction to prevent the planetary gears 19 and 23 from rotating in other directions,
An electromagnet 21 that maintains the meshing state between the planetary gear and the gear for driving the film winding mechanism, and detection devices 89 and 90 that detect the completion of feeding of one frame of film, and the detection device 89 and 90 detect the completion of feeding of the film. A motor-driven camera characterized in that the electromagnet is turned off when no signal is output.