JP2003344917A - Power transmitting mechanism for camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power transmitting mechanism for a camera which can reduce noise and vibration generated by a motor incorporated in a camera main body. <P>SOLUTION: The mechanism has: the motor; a 1st pulley which rotates integrally with the output rotating shaft of the motor and has a helical tooth shape on its outer circumferential surface; a gear member which has a 2nd pulley part having a rotating shaft almost parallel to the rotating shaft of the 1st pulley and having a helical tooth shape on its outer circumferential surface and has a gear part rotating integrally with the 2nd pulley part and having a gear formed on its outer circumferential surface; a timing belt which has a helical tooth shape on its inner circumferential surface and is wound around the 1st pulley and 2nd pulley to transmit the rotational driving force of the motor to the gear member; and a gear train part to which the rotational driving force that the gear member receives is transmitted, wherein the helical tooth shapes of the 1st pulley part, 2nd pulley part, and timing belt have the same helix angle and at least one of a mirror driving mechanism, a shutter charge mechanism, a film winding mechanism, and a film rewinding mechanism is driven. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission mechanism of a camera which uses a motor as a driving source and reduces the driving sound.

[0002]

2. Description of the Related Art Conventionally, in a single-lens reflex camera, there is known one which drives a mirror drive mechanism, a shutter charge mechanism, a film winding or rewinding mechanism, and a strobe up or down mechanism with a motor as a driving source. Various techniques for reducing the noise of the mechanism have been proposed.

For example, in a power transmission mechanism of a camera disclosed in Japanese Patent Laid-Open No. 4-352136, a motor is floatingly supported by a structure of a camera body via an elastic member, and a worm gear is attached to an output rotary shaft of the motor. A worm gear is engaged with the worm gear to transmit power. Further, the power transmission mechanism of the camera, which takes out the output of the motor through the timing belt, realizes a quiet driving mechanism.

Further, in the camera disclosed in Japanese Unexamined Patent Publication No. 4-371932, a film winding spool has a camera body body unit which is rotatably positioned and fixed independently, and a drive having a film transfer motor and a gear train. The unit is attached to the camera body main unit via a vibration absorbing material, thereby achieving quietness.

By the way, Japanese Patent Laid-Open No. 4-352136 describes a power transmission mechanism for a camera that takes out the output of the motor through a timing belt, but this is for the structure of the camera body with the motor alone. Even if the elastic member is floatingly supported, the effect of absorbing the meshing error due to the looseness of the timing belt is described, which shows the floating support of the motor.

[0006]

The problem to be solved by the present invention is that noise and vibration are generated from the motor incorporated in the camera body.

A first and a third object of the present invention is to provide a power transmission mechanism for a camera, which can further reduce the drive sound generated from the motor as compared with the camera shown in the above-mentioned conventional example and can be moved quietly. is there.

A second object of the present invention is to avoid the risk of damaging the motor by applying a load to the output rotary shaft of the motor in the thrust direction.

[0009]

An example of a power transmission mechanism of a camera which achieves the object of the present invention is a motor and an output rotary shaft of the motor, which rotates integrally with each other and has a helical tooth shape on an outer peripheral surface. A first pulley, a second pulley portion having a rotation axis substantially parallel to the first pulley, and an outer peripheral surface having a helical tooth shape, and an outer periphery which rotates integrally with the second pulley portion. A gear member having a gear portion having a gear formed on its surface, and a helical tooth shape on the inner peripheral surface, and is wound around the first pulley and the second pulley portion to rotate the motor. A timing belt that transmits a driving force to the gear member, and a gear train portion that transmits the rotational driving force received by the gear member, the first pulley, the second pulley portion, and the timing. The helical teeth of the belt have the same twist angle, and the mirror drive Mechanism, shutter charging mechanism, film winding mechanism, and film rewinding mechanism, and is configured to drive at least one of them, and the power is not transmitted by a known timing belt having a spur tooth shape, but an output rotary shaft of a motor. A helical toothed pulley fixed to, a helical toothed timing belt, a helical toothed pulley and a gear member having a gear,
The pulley and the timing belt, and the timing belt and the gear are meshed with each other to transmit power. Also, if a helical toothed pulley is fixed to the motor output rotary shaft and rotated, a load may be applied to the motor output rotary shaft in the thrust direction and the motor may be damaged. It is characterized in that load receiving members for restricting the movement of thrust are provided above and below.

It is preferable that load receiving members for preventing the movement of the first pulley in the thrust direction are provided near both ends of the first pulley in the thrust direction.

At least one of the first pulley and the second pulley preferably has a flange portion having a diameter larger than the outer diameter of the pulley.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A power transmission mechanism of a camera having the above-described structure includes a helical gear pulley fixed to an output shaft of a motor, and a gear member having a helical gear pulley and a gear. Generation of vibration and noise from the motor can be reduced by engaging with the timing belt in the shape of a helical tooth. In addition, since it is not necessary to separately support the motor in a floating manner as in the conventional example, there is no power transmission loss due to poor meshing.

Next, an embodiment of the present invention will be described with reference to the drawings. The present embodiment shows a case where the present invention is applied to a single-lens reflex camera.

1 to 6 are views showing the mechanism of this embodiment, and FIG. 1 is a perspective view showing the outline of the whole of this embodiment, FIG.
FIG. 4 is a perspective view showing the configuration of each unit shown in FIG.
2 is a partial cross-sectional view showing a main part of FIG. 2, FIG. 5 is a plan view showing a side surface configuration of the mirror box unit of FIG. 4, FIG. 6 is a plan view showing a strobe drive mechanism, and FIG. 7 is a detailed view of parts. The configuration will be described below. In FIG. 1, 1 is a camera body,
A drive unit D for transmitting main operations such as film drive, mirror and shutter charge drive operations of the camera is attached to the lower surface of the camera body 1, and a shutter unit S and a mirror box unit MB are attached to the front surface of the aperture of the camera.

First, in the drive unit D shown in FIG. 2, M1 is a motor capable of forward / reverse rotation, and performs film drive, mirror drive, and shutter charge. Therefore, in this embodiment, a relatively large output and a relatively large size are provided. The coreless motor is used, and a pulley 2 having a helical tooth shape (hereinafter referred to as pulley 2) is fixed to the output rotation shaft of the coreless motor. Reference numeral 3 denotes a helical toothed timing belt (hereinafter, timing belt 3), 4 denotes a gear member having a helical toothed pulley on one side and a gear on the other side (hereinafter, gear member 4),
Reference numeral 4a denotes a flange portion that prevents the timing belt 3 from falling off the pulley portion due to the vertical movement of the timing belt 3, and the rotation of the pulley 2 is transmitted by the timing belt 3.

As shown in FIG. 3, the pulley 2, the timing belt 3, and the gear member 4 are formed with helical teeth having the same twist angle, and the angle is set in the range of 5 ° to 45 °. However, if the value of the twist angle of the helical teeth is small, the noise reduction effect is small, and if the value of the twist angle is large, the noise reduction effect is large. However, if the value of the twist angle is large, the driving efficiency decreases, so it is around 10 °. Is appropriate. Reference numeral 17 is a base plate, and 17a is a load fixed to the base plate 17 so as not to apply a load in the thrust direction to the motor M1 even if a load is applied so that the pulley 2 moves up and down the output rotation shaft of the motor. It is a receiving member. In FIG. 3, even if the pulley 2 fixed to the motor M1 moves upward, the pulley 2 is regulated by the load receiving member 17a for vertical movement.

Reference numeral 5 denotes a sun gear having a large gear meshing with the gear member 4 and small gears on both sides thereof, as shown in FIG.
Revolve two planetary clutches that mesh with each small gear. Reference numeral 6 denotes a planetary gear that constitutes one planetary clutch, which is meshed with one small gear of the sun gear 5 by a planetary lever 7 and revolves. The planet lever 7 has stopper parts 7a, 7 when the revolution is blocked by a switching lever described later.
It has a part b. As shown in FIG. 7, reference numeral 8 denotes a planetary gear that constitutes the other planetary clutch, and the planetary lever 9 meshes with the other small gear of the sun gear 5 to revolve. The planetary lever 9 has stopper portions 9a and 9b for preventing the revolution by a switching lever described later. Reference numeral 10 is composed of three gears as shown in FIG.
Is transmitted when the planetary gear 6 revolves with the sun gear 5 and meshes with the sun gear 5. Similarly, the gear portion 10b has more teeth than the gear portion 10a, and the normal rotation of the motor M1 is transmitted. This is a gear that is transmitted when the planetary gear 8 revolves around the sun gear 5 and meshes with it, and is transmitted to the film winding system via the gear portion 10c.

Reference numeral 11 is a spool for winding the film, and has a gear portion 11a which meshes with the gear portion 10c of the gear 10 and is rotated for transmission. Therefore, when the motor M1 rotates in the normal direction, the gear ratio when the planetary gear 6 meshes with the gear portion 10a of the gear 10 is smaller than when the planetary gear 8 meshes with the gear portion 10b of the gear 10, and the spool 11 has a smaller gear ratio. It is set to rotate at high speed. Further, the planetary gear 6 and the planetary gear 8 are controlled by a switching mechanism described later so that the planetary gear 6 and the planetary gear 8 do not mesh with the gears 10a and 10b at the same time when the motor M1 rotates normally. In this embodiment, the gear ratio is set to 1:24 when the planetary gear 6 meshes with the gear 10a and to 1:42 when the planetary gear 8 meshes with the gear 10b.

Reference numeral 12 denotes a planetary gear 8 due to the reverse rotation of the motor M1.
Is a gear that revolves around the sun gear 5, is mesh-transmitted, and is transmitted to the film rewinding system. The gear meshes with the gear 13 and is mesh-transmitted with the gear 14. Reference numeral 15 is a gear that meshes with the gear 14, and has a pulley on one side, and the timing belt 16 transmits the meshed rewinding system. Reference numeral 17 denotes a base plate which fixes the motor M1 and rotatably supports the gear members 4 to 5, the gear 10, the spool 11 and the gears 12 to 15. Reference numeral 18 denotes a switching lever that is rotatably supported by the main plate 17, and has an arm portion 18a as shown in FIG.
And the arm portion 18b and the shaft portion 18c, the arm portion 18b traces a cam described later to swing the switching lever 18, and the arm portion 18a abuts on the stopper portion 7a or 7b of the planetary lever 7 and revolves. Block. A switching lever 19 is rotatably supported by the main plate 17, and as shown in FIG. 7, the switching lever 18 is brought into contact with a cam portion 19a interlocking with a shaft portion 18c of the switching lever 18 and a stopper portion 9a or 9b of the planetary lever 9. It has an arm portion 19b that blocks the revolution. Reference numeral 20 denotes a torsion spring, which urges the switching lever 18 to rotate counterclockwise when viewed from the bottom surface direction. In addition, the switching lever 18 and the switching lever 1
Due to the relationship between the shaft portion 18c and the cam portion 19a, 9 is set so as to swing in opposite directions, such that when one rotates in the clockwise direction, the other rotates in the counterclockwise direction. Reference numeral 21 is a cover that prevents the gear members 4 to 5, the planetary levers 7 and 9, the gear 10, the gears 12 to 15 and the switching levers 18 to 19 from coming off, and is fixed to the main plate 17 with screws.

Reference numeral 22 denotes a rewinding fork unit for winding the film on the film cartridge, which has a pulley at its lower end portion for meshing with the timing belt 16 and is rotatably supported by the cover 21. Reference numeral 23 denotes a roller for applying a predetermined tension to the timing belt 16, which is rotatably supported by the cover 21. The above motor M1, gear 2 and roller 23 are one drive unit D.
3 cylindrical damper rubbers 2 each
It is fixed to the lower surface of the camera body 1 in a floating manner by 4 and the step screw 25.

Reference numeral 26 shown in FIG. 1 is a photoreflector, which optically detects the movement of a known film perforation, and is fixed to a predetermined position on the right side of the aperture surface of the camera body 1.

Next, in the mirror box unit MB shown in FIGS. 1 and 4, reference numeral 30 is a mirror box well known in single-lens reflex cameras, and shafts for rotatably supporting gears, levers, etc. are integrally formed on the lower surface and the side surface. Is configured.

M2 is a motor capable of forward / reverse rotation. In this embodiment, a small cored motor having a relatively low output is adopted, and it is fixed to the mirror box 30 and the gear 31 is fixed to its output rotating shaft. , Gear 31, gear 32, and gear 33 are meshed and transmitted. A sun gear 34 has a large gear meshing with the gear 33 and a small gear, and revolves a planetary clutch meshing with the small gear. Reference numeral 35 denotes a planetary gear that constitutes a planetary clutch as shown in FIG. 7, and the planetary lever 36 meshes with the small gear of the sun gear 34 to revolve.

Numeral 37 is a gear in which the planetary gear 35 revolves and meshes with the sun gear 34 when the motor M2 rotates in the reverse direction, and meshes with the cam gear 38. As shown in FIG. 7, the cam gear 38 includes a gear portion 38 a that meshes with the gear 37 and the cam portion 3.
8b, and the cam portion 38b is set so that the arm portion 18b of the switching lever 18 traces.
Therefore, the switching lever 18 urged by the torsion spring 20 while the cam gear 38 rotates once makes the cam portion 38 move.
It swings along b, and the switching lever 19 also follows and swings in a direction opposite to the switching lever 18. A brush 39 for sliding on the substrate is fixed to the cam gear 38. 40 is a phase substrate, brush 3
The sliding position of the cam gear 38 detects the rotational position of the cam gear 38.

Reference numeral 41 is a gear that meshes when the planetary gear 35 revolves in the direction opposite to the gear 37 side. The above gear 3
2, 33, 34, 37 and the cam gear 38 are rotatably supported by a shaft arranged on the lower surface side of the mirror box 30,
The gear member 41 is fixed to the lower end side of a shaft 42 that is rotatably supported by the mirror box 30 and that transmits from the lower surface side to the upper surface side. 43 is a gear 32, 33, 34, 37, 4
It is a cover that prevents the removal of 1.

Reference numeral 44 is a gear which allows the planetary gear 6 to revolve and mesh when the motor M1 of the drive unit D rotates in the reverse direction. Both gear members 44 and 45 are rotatably supported by the shaft of the cover 43. Reference numeral 46 is also a gear, and is fixed to the lower end side of a shaft 47 that transmits from the lower surface side rotatably supported by the cover 43 and the mirror box 30 to the side surface of the mirror box 30. Reference numeral 48 denotes a cover that prevents the gear members 44, 45, 46 and the cam gear 38 from coming off.
At the same time, a screw is fixed to the lower surface side of the mirror box 30.

Next, as shown in FIGS. 4 and 5, a worm gear member 49 fixed to the upper end of the shaft 42 is arranged on the upper side surface of the mirror box 30, and 50 converts the rotating direction of the worm gear member 49 by 90 degrees. It is a sun gear having a helical gear that meshes like this and revolves the planetary clutch. Reference numeral 51 denotes a planetary gear that constitutes a planetary clutch. The planetary gear 52 meshes with the sun gear 50 by means of a planetary lever 52 that is rotatable on the shaft on the upper side surface of the mirror box 30, and the rotation of the motor M2 during normal rotation is shown on the side surface of the mirror box 30. It is configured to revolve counterclockwise.

Next, as shown in FIGS. 4 and 5, on the side surface side of the mirror box 30, 53 and 54 are shafts 47.
Worm gear fixed to. 55 is a mirror box 30
The cam unit 5 is rotatably supported with respect to the axis of the side surface thereof and drives the mirror unit MR of the single-lens reflex camera between the finder observation position and the photographing position as shown in FIG.
A brush 56 for sliding a phase substrate, which will be described later, is fixed to the opposite side of the cam portion 55a.
Is a cam gear that is rotated counterclockwise when viewed from the side by rotating the worm gear 53, and has a helical gear portion that meshes so as to change the rotation direction of the worm gear 53 by 90 °. Similarly, 57 is also rotatably supported with respect to the axis of the side surface of the mirror box 30, and as shown in FIG.
Has a cam portion 57a for charging the motor M1
Is a cam gear which is rotated counterclockwise when viewed from the side by the reverse rotation, and has a helical gear portion which meshes so as to change the rotation direction of the worm gear 54 by 90 °.

Since the helical gears of the worm gears 53 and 54 and the cam gears 55 and 57 have the same gear specifications, that is, the same number of threads and the same number of teeth, the rotation of the motor M1 during reverse rotation is transmitted. The same reduction ratio is used. Therefore, the cam gear 55 and the cam gear 57 always rotate in the same phase relationship.

Reference numeral 58 denotes a mirror lever for transmitting the phase of the cam portion 55a of the cam gear 55 to the mirror unit MR in a swing manner, and drives the arm portion 58a tracing the cam portion 55a and the mirror unit MR as shown in FIG. Arm 58b
And is rotatably supported by the shaft on the side surface of the mirror box 30. Similarly, 59 is the cam portion 57a of the cam gear 57.
7 is a charge lever for swinging and transmitting the phase of the shutter unit S to the shutter unit S, and has an arm portion 59a tracing the cam portion 57a and an arm portion 59b driving the charge driving portion of the shutter unit S as shown in FIG. , Mirror box 3
It is rotatably supported by a shaft on the side of 0. Reference numeral 60 denotes a cover that prevents the cam gears 55, 57, the mirror lever 58, and the charge lever 59 from coming off, and is fixed to the side surface of the mirror box 30 with a screw. Reference numeral 61 denotes a phase substrate which is fixed to the cover 60 and on which the brush 56 of the cam gear 55 slides when the cam gear 55 rotates. The phase substrate 61 determines the phase of the movement of the mirror and the operation of the shutter charge.

Reference numeral 62 denotes a torsion spring, which has a coil portion on the rotation axis of the mirror lever 58, one arm of which is attached to a part of the mirror box and the other arm of which is attached to the axis of the mirror unit MR, and which causes the mirror unit MR to rotate. It is biased to the 58 side. Reference numeral 63 is also a torsion spring, and the coil portion and one arm are hooked on the shafts 60a and 60b of the cover 60, and the other arm is hooked on the shaft of the mirror unit MR to urge the mirror unit in the down direction. Therefore, when the mirror unit MR goes down, the torsion spring 63 is initially urged, and the latter half is urged by the torsion spring 62.

Reference numeral 64 indicates the charge lever 59 and the cam gear 57.
It is a torsion spring for urging the charging lever 59, and a coil portion can be hung on the rotating shaft of the charge lever 59, one arm can be hung on a part of the mirror box, and the other arm can be hung on the arm portion of the charge lever 59.

Next, in FIG. 6, C is an upper cover which is one of the exterior parts of the camera, and is fixed to the upper part of the camera body 1 so as to cover a pentaprism (not shown). Reference numeral 70 denotes a gear, which is used when the motor M2 rotates in the normal direction.
5, gear member 41, shaft 42, worm gear member 4
9, planetary gear 51 through gear train up to gear 50
Revolves counterclockwise, and is engaged and rotated. 71
Is a cam gear that meshes with the gear 70 and rotates in the clockwise direction.
Have. Reference numeral 72 is a normally open type leaf switch, which is turned on / off by a cam 71b.

Reference numeral 73 is a base plate that rotatably supports the gear 70 and the cam gear 71, and fixes the leaf switch 72, which is fixed inside the upper cover C. Reference numeral 74 denotes a strobe case that serves as a base of a strobe unit that can be moved up and down at a light emitting position and a storage position, and is rotatably supported on the upper portion of the upper cover C. One of the shafts is composed of a lever 75. As shown in FIG. 4, the lever 75 has a shaft portion 75a at both ends of the lever and a pin 75b driven by the cam 71a of the cam gear 71. The shaft portion 75a is an upper cover C
It rotatably penetrates from the inner side of the strobe case 74, and the lever 76 is fixed with a screw 77. Therefore, the lever 75 inside the upper cover C and the lever 76 inside the strobe unit are configured to swing integrally. Although not shown, the shaft of the other strobe case 74 is rotatably supported by the upper cover C by a step screw or the like. Reference numeral 78 denotes a torsion spring, one arm of which is hung on the lever 76 and the other arm of which is hung on the shaft 74a of the strobe case 74, and which is urged to rotate the lever 75 and the lever 76 clockwise with respect to the strobe case 74. .

Reference numeral 79 is a stopper pin, which is an upper cover C
Fixed to the side of. 74b is an axis of the strobe case 74, and 74c is a fan shape of the strobe case 74 for exposing the stopper pin 79 on the side surface of the upper cover C to the inside of the strobe unit when the strobe unit moves up and down at the light emitting position and the retracted position. The stopper pin 79 contacts the end of the fan-shaped hole 74c to determine the light emitting position of the strobe unit. Reference numeral 80 denotes a toggle spring in which one arm is hung on the stopper pin 79 and the other arm is hung on the shaft 74b. When the strobe unit is in the light emitting position, it is flipped in the up direction, halfway down, and lowered to the stored position. If it is, urge it in the down direction. Reference numeral 81 is a well-known strobe light emitting unit such as a xenon tube, a reflection shade, and a panel. Reference numeral 82 is a plastic cover, and 83 is an outer cover made of aluminum. The cover 82 is fitted inside the cover 83 and fixed to the strobe case 74. The torsion spring 78 here is always set to a stronger pressure than the toggle spring 80.

That is, the normal rotation of the motor M1 is the cam gear 7
When it is transmitted to 1 and the lever 75 is driven, the torsion spring 78 overcomes the toggle spring 80 and pushes up the strobe unit toward the light emitting position. Push up to position. Here, while the strobe unit is moving up toward the flash position,
When the movement is blocked by the photographer's hand or the like, the torsion spring 78 absorbs the rotation of the lever 75 and does not transmit the rotation of the lever 75 to the strobe unit. Therefore, only the lever 75 and the lever 76 swing so that they are not damaged. Has been done.

Next, the operating principle of the mechanism constructed as described above will be explained.

8 to 10, in the state of the switching levers 18 and 19 which are transmission switching mechanisms indexed by the cam gear 38 driven by the reverse rotation of the motor M2,
The state in which drive is transmitted by forward / reverse rotation of the motor M1 is shown in each figure (A).
3B shows the stop position of the brush 39, and FIG. 6B shows the state of the mechanism when the motor M1 reversely rotates with the cam gear 38 stopped at the position of the phase substrate 40 in FIG. (C) shows a state of drive transmission when the motor M1 is normally rotated with the cam gear 38 stopped at the position of the phase substrate 40 in (A).

Next, in FIG. 8 (A), when the motor M2 is rotated in the reverse direction and the brush 39 of the cam gear 38 stops at the shaded portion of the phase substrate 40, the signals POCH1: Low, POCH2: Low are output.

8- (B) -1 in FIG. 8- (B)
As shown in FIG. 3, the motor M1 reversely rotates, and the rotation of the pulley 2 causes the sun gear 5 to rotate clockwise through the timing belt 3. At this time, the planetary gear 6 and the planetary lever 7 also revolve clockwise, and at this time, the arm portion 18b of the switching lever 18 is retracted to a position where it does not come into contact with the stopper portion 7a of the planetary lever 7 that accompanies the planetary gear 6. The gear 6 is the gear member 4
4 meshes with gear members 45 and 46 and a shaft 47,
The cam gears 55 and 57 are rotated counterclockwise as viewed from the side surface of the mirror box 30 via the worm gears 53 and 54. Then, the mirror UP stop phase (CMSP1: Low, CMSP2: High) of the phase substrate 61 shown in FIG.
When the motor M1 is braked and stopped, the mirror UP is brought into the state. Further, the shutter charge complete stop phase (CMSP1: High, C
When the motor M1 is braked and stopped at MSP2: Low), the mirror DOWN and shutter charge are completed as shown in FIG.

At this time, as shown in FIG. 8- (B) -2, the planetary gear 8 and the planetary lever 9 also revolve clockwise like the planetary gear 6 and the planetary lever 7, but at this time, the arm portion of the switching lever 19 is used. Since 19b is in contact with the stopper portion 9a of the planetary lever 9 that accompanies the planetary gear 6, the planetary gear 8 idles without meshing with the gear 12. Therefore, the rotation of the motor M1 is not transmitted to the rewinding fork unit 22 after the gear 12. In FIG. 8- (C), FIG.
As shown in (C) -1, the motor M1 rotates normally and the pulley 2
The sun gear 5 is rotated counterclockwise via the timing belt 3. At this time, the planetary gear 6 and the planetary lever 7 also revolve in the counterclockwise direction, and at this time, the arm portion 18b of the switching lever 18 is retracted to a position where it does not contact the stopper portion 7b of the planetary lever 7 with the planetary gear 6. The planetary gear 6 meshes with the gear portion 10a of the gear 10 to rotate the spool 11 at high speed in the film winding direction via the gear portion 10c. At this time, as shown in FIG.
The planetary lever 9 and the planetary lever 9 revolve in the counterclockwise direction like the planetary gear 6 and the planetary lever 7, but at this time, the arm portion 19b of the switching lever 19 is in contact with the stopper portion 9b of the planetary lever 9 together with the planetary gear 6. Therefore, the planetary gear 8 idles without meshing with the gear portion 10b of the gear 10.

Therefore, when the film is fed 8 perforations at high speed, the motor M1 is braked to complete the film winding operation.

Next, in FIG. 9- (A), the signals when the motor M2 is rotated in the reverse direction and the brush 39 of the cam gear 38 stops at the shaded portion of the phase substrate 40 outputs POCH1: High, POCH2: Low.

In FIG. 9- (B), FIG. 9- (B) -1
As shown in FIG. 3, the motor M1 reversely rotates, and the rotation of the pulley 2 causes the sun gear 5 to rotate clockwise through the timing belt 3. At this time, the arm portion 18b of the switching lever 18 is retracted to a position where it does not come into contact with the stopper portion 7a of the planetary lever 7 that accompanies the planetary gear 6, so the planetary gear 6 meshes with the gear member 44 and the gear members 45 and 46 and the shaft 47. The cam gears 55 and 57 are rotated counterclockwise as viewed from the side surface of the mirror box 30 via the worm gears 53 and 54. When the motor M1 is braked and stopped at the mirror UP stop phase (CMSP1: Low, CMSP2: High) of the phase substrate 61 shown in FIG.
The state becomes P. Further, the shutter charge complete stop phase (CMSP1: High, CM
When the motor M1 is braked and stopped at SP2: Low), the mirror DOWN and shutter charge are completed as shown in FIG.

At this time, as shown in FIG. 9- (B) -2, the planetary gear 8 and the planetary lever 9 also revolve clockwise like the planetary gear 6 and the planetary lever 7, but at this time, the arm portion of the switching lever 19 is rotated. Since 19b is in contact with the stopper portion 9a of the planetary lever 9 that accompanies the planetary gear 6, the planetary gear 8 idles without meshing with the gear 12. Therefore, the rotation of the motor M1 is not transmitted to the rewinding fork unit 22 after the gear 12.

In FIG. 9- (C), FIG. 9- (C) -1
As shown in FIG. 5, the motor M1 rotates in the normal direction, and the rotation of the pulley 2 causes the sun gear 5 to rotate counterclockwise via the timing belt 3.

At this time, the planetary gear 6 and the planetary lever 7 also revolve in the counterclockwise direction. At this time, however, the arm portion 18b of the switching lever 18 is in contact with the stopper portion 7b of the planetary lever 7 together with the planetary gear 6. The planetary gear 6 idles without meshing with the gear portion 10 a of the gear 10.

At this time, as shown in FIG. 9- (C) -2, the planetary gear 8 and the planetary lever 9 also revolve in the counterclockwise direction like the planetary gear 6 and the planetary lever 7, and at this time, the switching lever 1
Since the arm portion 19c of the gear 9 is retracted to a position where it does not contact the stopper portion 9b of the planetary lever 9 with the planetary gear 8, the planetary gear 8 meshes with the gear portion 10b of the gear 10 and the gear portion 10b.
The spool 11 is rotated at a low speed in the film winding direction via c. Therefore, when the film is sent 8 perforations at a low speed, the motor M1 is braked,
The film winding operation is completed.

Next, referring to FIG. 10- (A), the motor M2
When the brush 39 of the cam gear 38 is stopped in the shaded portion of the phase substrate 40 by reversing, the signal outputs POCH1: Low, POCH2: High.

In FIG. 10- (B), FIG. 10- (B)
As indicated by -1, the motor M1 reversely rotates, and the rotation of the pulley 2 causes the sun gear 5 to rotate clockwise through the timing belt 3. At this time, the planetary gear 6 and the planetary lever 7 also revolve clockwise, but at this time, the arm portion 1 of the switching lever 18
8b is a stopper portion 7 of the planetary lever 7 with the planetary gear 6.
Since it is in contact with a, the planetary gear 6 runs idle without meshing with the gear member 44. Therefore, the gear member 44
After that, since the rotation of the motor M1 is not transmitted to the cam gears 55 and 57, the mirror drive and the shutter charge operation are not performed.

At this time, as shown in FIG. 10- (B) -2, the planetary gear 8 and the planetary lever 9 also revolve in the clockwise direction, and at this time, the arm portion 19b of the switching lever 19 is the planetary gear 8.
Since it is retracted to a position where it does not come into contact with the stopper portion 9a of the planetary lever 9, the planetary gear 8 meshes with the gear 12 and the rewinding fork unit 22 in the film rewinding direction via the gears 13 to 15 and the timing belt 16. The film is rewound by rotating it.

FIG. 10- (C) is not described because the setting is such that the motor M1 is not normally rotated in the phase state of FIG. 10- (A) in the embodiment.

8 to 10, the principle of switching operation of the drive transmission mechanism when the relatively large motor M1 having a high output is rotated forward and backward by the reverse rotation of the small motor M2 having a low output has been described. In each of FIGS. 8 to 9, in each drawing (B) by the reverse rotation of the motor M1, the planet gear 6 meshes with the gear member 44 to perform mirror down and shutter charge, and in the normal rotation, in each drawing (C). Each is in a phase in which high speed film winding by the planetary gear 6 or low speed film winding by the planetary gear 8 is performed.

Therefore, the normal release operation, that is, the mirror UP → mirror Down / shutter charge → a series of film winding operations, is the reverse rotation of the motor M1.
The motor M determines whether the film is wound at high speed or at low speed depending on the level of the power supply voltage.
It can be selected by reversing 2.

In the film rewinding operation, the motor M2 is once rotated in the reverse direction so as to be in the state of FIG. 10- (A), and then the film rewinding operation of FIG. 10- (B) is set. There is.

Next, the strobe pop-up operation and the manual down operation will be described with reference to FIG.

When the motor M2 is normally rotated in the state of FIG. 11- (A), the cam gear 71 rotates clockwise, and
As shown in (B), the cam 71 a of the cam gear 71 is a lever 75.
The pin 75a of is pressed against the force of the toggle spring 80, and the strobe unit is pushed up toward the position where light emission is possible.
At this time, as described above, the torsion spring 78
Is always set to a pressure higher than that of the toggle spring 80, so that the strobe unit is also displaced by the displacement angle of the lever 75 without being absorbed. Then, the cam 71 of the cam gear 71
Since the reversal region of the toggle spring 80 is set in the middle of the region where a presses the pin 75a of the lever 75, the drag force of the toggle spring 80 pushes up the strobe unit toward the position where the strobe unit can emit light after exceeding the reversal region. Then, although the cam gear 71 loses the load of pushing up the strobe unit from the middle, it continues to rotate clockwise, and the cam 71b of the cam gear 71 as shown in FIG. 11- (C).
Turns on the leaf switch 72 to switch the signal from High to Low.

Then, the cam gear 71 continues to rotate further clockwise, and the cam 71b of the cam gear 71 turns off the leaf switch 72 as shown in FIG.
After switching to a High signal and confirming a switch (not shown) for detecting the strobe unit up state, the motor M2 is stopped and the strobe unit is completely moved up to the light-emissible position.

Here, when the photographer manually pushes the strobe unit which has been raised to a position where light can be emitted as shown in FIG. 11- (D), the drag force of the toggle spring 80 is reached from a position beyond the reversal region of the toggle spring 80. Then, the strobe unit is lowered to the storage standby position, and the state shown in FIG. 11- (A) is restored. At this time, since the cam 71a of the cam gear 71 has already retracted from the swing range of the pin 75a of the lever 75, the drag force absorbed by the torsion spring 78 does not occur.

Further, in the state of FIG. 11- (A), when the photographer manually pulls up the strobe unit, the toggle spring 8 is moved from a position beyond the inversion region of the toggle spring 80.
The drag force of 0 raises the strobe unit to a position where light emission is possible, resulting in the state of FIG. 11- (D), and the up state is detected by a switch for detecting the strobe unit up state (not shown).

That is, the strobe mechanism described in the present embodiment is capable of both an automatic strobe up operation by driving the motor M2 and a manual operation such that the photographer directly pulls up the strobe unit.

Next, a phenomenon will be described in which the strobe up operation is started by the forward rotation of the motor M2 while the strobe unit is being pressed by the photographer's finger or the like.

First, in the state of FIG. 11- (E), the motor M
When 2 is rotated normally, the cam gear 71 rotates clockwise,
The cam 71a of the cam gear 71 pushes the pin 75a of the lever 75. However, since the strobe unit is still pressed, the torsion spring 78 absorbs the displacement angle of the lever 75 as shown in FIG. 11- (F). The cam gear 71 continues to rotate further clockwise, and the cam 71b of the cam gear 71 turns on the leaf switch 72 as shown in FIG.
The signal is switched from High to Low. Then, the cam gear 71 continues to rotate further clockwise, as shown in FIG.
Returning to the state of (E), the cam 71b of the cam gear 71 turns off the leaf switch 72 and switches the signal from Low to High. However, since the switch for detecting the strobe unit up state (not shown) cannot confirm the up operation, the same operation is repeated two more times to stop the motor M2 and display an error of the up operation to the position where the strobe unit can emit light.

Next, the control circuit of the camera will be described with reference to FIG.

In the figure, CPU is a microcomputer and BAT is a battery. SW1 is a power switch that is turned on by pressing a first stroke of a release button (not shown), and the diode D is turned on by turning on the power switch SW1.
Transistor TRBAT via SW1 and resistor R2
Is turned on, and power supply to each circuit is started. The output of the power switch SW1 is the microcomputer CPU.
Is supplied to the input port SW1. The transistor TRBAT is also turned on via the diode DOS and the resistor R2 by the operation of the one-shot circuit OS for a certain period of time accompanying the ON (closing) of the back lid switch SWBP described later.
When the back lid is closed, the transistor TRBAT turns on.
The purpose is to supply power to the microcomputer CPU for film loading when the camera is loaded with film and the back lid (not shown) is closed.
The transistor TRBAT is held in the ON state via the inverter I1 and the resistor R2 when the microcomputer CPU is in the operating state and the output port VON is in the H state.

In the figure, REG is a regulator, which is connected to the collector output of the transistor TRBAT and supplies a stable constant voltage VCC to each circuit (in the figure, the constant voltage VCC is a microcomputer CPU.
Input port Vcc and the analog circuit MET that performs photometric calculation). MET is an analog circuit that performs photometric calculation, performs BV-AV calculation of subject brightness information (BV) obtained by the photometric sensor SPC and RAV corresponding to preset aperture value information (AV), and outputs BV1.
Information is input as OUT to an input port ADIN1 as an AD conversion input of the microcomputer CPU. RISO is a resistor corresponding to the film sensitivity information SV, and information is input to the input port ADIN2 of the microcomputer CPU. In addition, VBAT
Is the battery voltage of the battery BAT and is supplied to the input port ADIN3 of the microcomputer CPU and the transistor bridge circuit MD described later.

SWPTIN is a film loading detection switch, which is composed of, for example, a leaf spring arranged in the camera's cartridge chamber. When the film cartridge is loaded in the cartridge chamber, the leaf spring is pressed to turn on the switch.
Then, the output of this switch is supplied to the input port PTIN of the microcomputer CPU.

SWBP is a back lid switch, which is turned on when the back lid is closed and turned off when it is opened. The input port BP of the microcomputer CPU and the one-shot circuit O are provided.
Supplying output to S.

SWCMSP1 and SWCMSP2 correspond to the phase patterns of the CMSP1 and CMSP2 of the phase substrate 61, respectively, and mean the switches associated with the sliding of the brush 56 and the phase pattern. The output of each switch is supplied to the input ports CMSP1 and CMSP2 of the microcomputer CPU. (The relationship between the state of the mechanism and the output signal is shown in FIGS. 7 to 9.) S
WPOCH1 and SWPOCH2 are phase substrates 40, respectively.
Corresponding to the phase patterns of POCH1 and POCH2, and means a switch associated with sliding of the brush 39 and the phase pattern. The output of each switch is the input port POCH1, of the microcomputer CPU.
It is supplied to POCH2. (The relationship between the state of the mechanism and the output signal is shown in FIGS. 8 to 10.) SWSTUP is a switch that determines whether or not the strobe unit built into the camera is in the light emitting position and is a leaf. When the switch is formed and is in the light emitting position, it is supplied to the input port STUP of the microcomputer CPU.

SWSTCTL is a leaf switch 72 which detects the phase of the cam 71b of the cam gear 71 which drives the strobe unit to the light emitting position and supplies it to the input port STCTL of the microcomputer CPU.

The FLM is a photo reflector 26, which is supplied from the output port PRON of the microcomputer CPU, emits infrared light from the light projecting portion, detects the light reflected by the film at the light receiving portion, and the microcomputer C
Supply to the input port PRAD of PU. As shown in FIG. 1, the photo reflector 26 is arranged at a position facing the perforation of the film, and the infrared light is transmitted through the perforation portion and the light is not returned to the light receiving portion. Then, the number of perforations is counted to detect the movement amount of the film.

The DSP is a display drive circuit for performing various displays of the camera such as photographing information and warning display, and is supplied from the output port CSDSP of the microcomputer CPU.

SW2 is a release switch which is turned on when the second stroke of the release button X is pressed, and its output is supplied to the input port SW2 of the microcomputer CPU.

MD1 and MD2 are well-known transistor bridge circuits for controlling the motor M1 and the motor M2 in accordance with the instruction of the microcomputer CPU to rotate them in the forward and reverse directions, respectively.
1F, M1R and M2F, M2R are connected.

MG1 is a shutter leading blade group magnet, and is configured to start running of the shutter leading blade group by cutting off the energization. Specifically, specifically, the output port PS0 of the microcomputer CPU is set to Low.
To the transistor T via the resistor RMG1.
The RMG1 is turned off to cut off the energization of the magnet MG1. Further, MG2 is a magnet for the rear shutter blade group, and is configured to start running of the rear shutter blade group by cutting off the energization. Specifically, the output port PS1 of the microcomputer CPU is set to L.
By setting it to ow, the transistor TRMG2 is turned off via the resistor RMG2, and the energization of the magnet MG2 is cut off.

FLSH is a strobe circuit including a main capacitor, a xenon tube, etc., and a microcomputer CPU
The light emission signal FS, the issuance stop signal FO, and the charge start signal SC are supplied from the output port of the above, and the charge completion signal CF is supplied to the input port.

X is a switch that is turned on when the front curtain of the shutter unit S is completed, supplies a signal to the input port X of the microcomputer CPU, and CN2 is when the rear curtain of the shutter unit S is completed. The switch is turned on and supplies a signal to the input port CN2 of the microcomputer CPU.

Next, the operation of the camera control circuit will be described with reference to FIGS.
It will be described based on the flowchart of FIG.

When the microcomputer CPU is supplied with power, the program is executed and the output port VON goes high.
As the high level, the transistor TRBAT is kept on and the power supply holding control is performed.

In FIG. 13, film auto-adhesion (hereinafter referred to as AL) [AL] is started. (101) The back lid switch SWBP is turned on by closing the back lid of the camera. (102) The voltage VBAT of the battery BAT is checked based on the analog input of the input port ADIN3 (AD conversion input). The voltage VBAT is AD-converted by the AD converter in the microcomputer CPU, and if it is at Level 1 or less, that is, the voltage at which the operation of the camera is prohibited, the camera may malfunction, so proceed to (103) and prohibit it. If the voltage is exceeded and there is no problem with the capacity, proceed to (104). (103) Display drive circuit DS from output port CSDSP
A serial signal is output to P to display a warning of low battery voltage, and the process proceeds to (999). (999) This [STOP] routine is executed at the output port V
When ON is set to Low, the transistor TRBAT is turned OFF, and the regulator REG is also deactivated to turn off the circuit system power supply. Also, wait for the time.
Normally, the power supply VCC is turned off while the microcomputer CPU waits for this time.

Even if this waiting time is completed, the power supply VC
C may be present. It is a transistor TR
When BAT is ON due to a factor other than the output of the output port VON, specifically, the power switch SW1 is ON.
Alternatively, the one-shot circuit OS is operating by turning on the back cover switch SWBP. (104) It is determined whether the transmission switching mechanism is in the Low winding state in FIG. 9 according to the phase of the cam gear 38, and the POC
H 1: High and POCH 2: L
If it is ow, proceed to (108). If it is different, (10)
Proceed to 5). (105) The motor M2 is reversely rotated so that the transmission switching mechanism at the time of normal rotation of the motor M1 is in the Low winding state of FIG. Here, the motor M of the microcomputer CPU
In the reverse control, the output port M2F is set to "H", M2
R is “L”, and in forward rotation, output port M2F is “L”, M2
R is "H", brake is output port M2F is "H",
Let M2R be "H". (106) Due to the rotation of the cam gear 38, the phase of the phase substrate 40 is POCH 1: High and POCH.
2: Low, and the transmission switching mechanism is Low in FIG.
When the winding state is reached, the process proceeds to (107), and a predetermined time (1
s) Even POCH 1: High and PO
CH 2: If it does not become Low, proceed to the STOP routine (999). (107) When the signal is satisfied at (106), the motor M2 is braked and the routine proceeds to (108). (108) Whether or not a film cartridge is loaded in the camera is determined by the output of the film loading detection switch SWPTIN. If loaded, the process proceeds to 103, and if not loaded, the [release] routine proceeds. (109) The ISO sensitivity of the Patrone DX code is RI
It is read by SO, input to the input port ADIN2 (AD conversion input), and stored in the register SV. In order to wind the (110) film Low, the motor M1 is normally rotated, and the process proceeds to (111). Here, the control of the motor M1 of the microcomputer CPU is as follows: output port M1F is "H", M1R is "L" in reverse rotation, output port M1F is "L", M1R is "H" in forward rotation, output port is in braking. Let M1F be "H" and M1R be "H". The photoreflector 26 (FLM) counts the perforations of the (111) film and resets the pulse counter and the film counter for the number of filming frames of the film to store in the EEPROM in the microcomputer CPU. (112) The timer in the microcomputer CPU is set as the AL timer and 1.5 sec is set. (113) When a light emitting diode is caused to emit light from the output port PRON to the photo reflector 26 (FLM) and a signal is detected by the movement of the perforation of the film, the input port PRAD is supplied. Here, the detection of the first perforation, that is, the change of the signal is AL timer 1.5s
When it is not within the range, the procedure proceeds to (114), and when the AL timer is changed within 1.5 seconds, the procedure proceeds to (116). (114) Brakes the motor M1. (115) Display drive circuit DS from output port CSDSP
A serial signal is output to P, a warning that AL is impossible is displayed, and the process proceeds to the [STOP] routine (999). (116) EEPRO in microcomputer CPU
Count up the M pulse counter. (117) The timer 1.5 sec in the microcomputer CPU is reset. (118) The timer in the microcomputer CPU is newly set to 300 ms. As in (119) and (113), if the detection of the next perforation, that is, the change of the signal is not within the timer 300 ms, the process proceeds to (120) and the timer 300 ms.
If it is changed within the range, the process proceeds to (123). (120) The brake is applied to the motor M1, and the process proceeds to (115) to display that AL is impossible. (121) EEPRO in microcomputer CPU
Count up the M pulse counter. (122) EEPRO in the microcomputer CPU
Whether or not the pulse counter of M has reached 20 is compared, and when it has not reached 20, the process returns to (119), and when it reaches 20, the process proceeds to (123). (123) The brake is applied to the motor M1. (124) Timer 3 in microcomputer CPU
Reset 00ms. (124) The motor M2 is reversely rotated so that the transmission switching mechanism at the time of normal rotation of the motor M1 is in the high winding state of FIG. (126) Due to the rotation of the cam gear 38, the phase of the phase substrate 40 becomes POCH 1: Low POCH 2.
: When it becomes Low and the transmission switching mechanism becomes the state of high winding in FIG. 8, the process proceeds to (127) for a predetermined time (1
s) POCH 1: Low and POC
H 2: If not Low, go to the STOP routine (999). When the signals are satisfied at (127) and (124), the motor M2 is braked and the routine proceeds to (128). (128) To wind the film High,
The motor M1 is normally rotated, and the process proceeds to (129). (129) The timer in the microcomputer CPU is newly set to 150 ms. Similarly to (1M2), (113) and (119), the detection of the next perforation, that is, the change of the signal is detected by the timer 15
If it is not within 0 ms, the procedure proceeds to (131), and if it is changed within 150 ms, the procedure proceeds to (132). (131) Brakes the motor M1 and proceeds to (115) to display that AL is impossible. (132) EEPRO in microcomputer CPU
Count up the M pulse counter. (133) EEPRO in microcomputer CPU
Whether or not the pulse counter of M has reached 28 is compared, and when it has not reached 28, the process returns to (129), and when it reaches 28, the process proceeds to (134). (134) Apply the brake to the motor M1. (135) Timer 1 in microcomputer CPU
Reset 50 ms. (136) EEPRO in microcomputer CPU
The film counter of M is counted up, 1 is written here, and the AL ends.

A [release] routine for photographing will be described with reference to FIG. (201) When SW1 is turned on by pressing the first stroke of the release button (not shown), the process proceeds to the next step. (202) Perform voltage check as in (102) and Lev
Since there is a possibility that the camera may malfunction when it is below the voltage that prohibits the operation of the camera (el 1) (10
When the voltage exceeds the prohibited voltage and there is no problem in the performance, the process proceeds to (203). (203) A photometric calculation is performed by SPC. A digital value ADIN1 obtained by AD conversion of an analog signal from BV1OUT as an output of the photometric calculation circuit MET by the microcomputer CPU is stored in the register BV1 (BV1).
1 = ADIN1). BV in terms of Apex value
The value of AV is stored in the register BV1.

The ISO sensitivity of the film is (109)
Are stored as a register SV (SV = ADIN2).

In addition, the register BV1 and the register SV
The shutter speed is obtained based on the store information of (TV = B
V1 + SV), and store in register TV. The content of the register TV is an Apex value TV. (204) If the BV1 obtained in (203) is lower than a predetermined value, that is, if it is determined that it is dark, a strobe is required and the [Strobe UP] routine is proceeded to. If it is higher than the predetermined value, that is, if it is bright. To go to (205). (205) When SW2 is turned on by pressing the second stroke of the release button (not shown), the process proceeds to (207) and is turned on.
If not, SW1 is ON or SW1 is ON
Then, the process returns to (203) within the predetermined time (6s), and proceeds to the [STOP] routine after the predetermined time (6s). Similarly to (206) and (202), the voltage is checked, and if NG, proceed to (103), and if OK, proceed to (207). (207) The motor M1 is rotated in the reverse direction, and the cam gears 55 and 57 are rotated to raise the mirror and release the shutter charge. (208) When the cam gear 55 rotates, the phases for mirror up and shutter charge release are determined by the phases CMSP1: Low and CMSP2: High of the phase substrate 61, and the process proceeds to (211) for a predetermined time (300 ms).
If it cannot be detected within the time, the process proceeds to (209). (209) Brakes the motor M1. (210) Displays a warning that the mirror cannot be raised and displays STO
Proceed to P routine (999). When the signals are established at (211) and (208), the motor M1 is braked. (212) Apex value TV obtained in (203)
Is converted to an actual shutter time (real time extension).

With the output port PS0 set to H, the magnet MG1 for starting the traveling of the shutter leading blade group of the shutter unit S is energized. As a result, the shutter front blade group travels to start exposure of the film.

The actual time at the shutter speed is counted, and this time becomes the exposure time.

When the real-time counting is completed, the output port PS1 is set to H, and the magnet MG2 for starting the trailing shutter blade group is energized, whereby the trailing shutter blade group travels to expose the film. To end.

The switch CN2 is turned on when the trailing shutter blade group has completed traveling.

Both output ports PS0 and PS1 are set to L.
As a result, the energization of both magnets MG1 and MG2 is stopped.

At this time, if the strobe is required at (204), the strobe unit is moved up to the light-emissible position, and SWSTUP is in the ON state, the shutter time is set at the shutter synchronization time and the shutter tip is set. When the blade group has completed traveling and the switch X is turned on, a light emission start signal is supplied from the output port FS of the microcomputer CPU to the FLSH circuit, and the strobe light is emitted. And
The microcomputer C is controlled by the output of a dimming circuit not shown
A light emission stop signal is supplied from the output port FO of the PU to the FLSH circuit, and the strobe light emission is stopped. (213) The motor M1 is rotated in the reverse direction, and the cam gears 55 and 57 are rotated to perform mirror down and shutter charge. (214) When the rotation of the cam gear 55 determines the phase of mirror down and shutter charge completion by the phases CMSP1: High and CMSP2: Low of the phase substrate 61, the process proceeds to (217), and a predetermined time (300 ms)
When it cannot be detected within the range, the process proceeds to (215). (215) The brake is applied to the motor M1. (216) The mirror down and shutter charge impossible warning are displayed, and the process proceeds to the STOP routine (999). When the signals are established at (217) and (208), the motor M1 is braked. (218) If the film counter in the microcomputer CPU is 0, proceed to the [release] routine,
When the film counter is 1 to 35, the process advances to the [film rewind] routine, and when the film counter is 36, the final frame photographing is terminated and the process advances to the [film rewind] routine.

Next, referring to FIG. 15, the [film winding] routine will be described. Similar to (301), (102), (202), and (206), the voltage check is performed, and if NG, proceed to (103), and if OK, proceed to (403). (302) Further, the voltage check level is a predetermined value Leve
Whether it is higher than 12 or not is determined, and if it is higher, the state is set to the high voltage state and the process proceeds to (303). If not, the state is set to the low voltage state and the process proceeds to (307). (303) Based on the phase of the cam gear 38, it is determined whether or not the transmission switching mechanism is in the high winding state shown in FIG.
CH 1: Low and POCH 2: L
If it is ow, proceed to (311). If it is different, (30
Proceed to 4). (304) The motor M2 is rotated in the reverse direction so that the transmission switching mechanism at the time of normal rotation of the motor M1 is in the high winding state of FIG. (305) Due to the rotation of the cam gear 38, the phase of the phase substrate 40 is POCH 1: Low POCH 2.
: When it becomes Low and the transmission switching mechanism is in the state of high winding in FIG. 8, the process proceeds to (306) for a predetermined time (1
s) POCH 1: Low and POC
H 2: If not Low, go to the STOP routine (999). (306) When the signal is satisfied in (305), the motor M2 is braked and the process proceeds to (311). (307) It is determined whether the transmission switching mechanism is in the Low winding state in FIG. 9 according to the phase of the cam gear 38, and the POC
H 1: High and POCH 2: L
If it is ow, proceed to (311). If it is different, (30
Proceed to 8). (308) The motor M2 is rotated in the reverse direction so that the transmission switching mechanism at the time of normal rotation of the motor M1 is in the Low winding state of FIG. (309) Due to the rotation of the cam gear 38, the phase of the phase substrate 40 becomes POCH 1: High and POCH.
2: Low, and the transmission switching mechanism is Low in FIG.
When the winding state is reached, the process proceeds to (310) for a predetermined time (1
s) Even POCH 1: High and PO
CH 2: If it does not become Low, proceed to the STOP routine (999). When the signals are satisfied at (310) and (309), the motor M2 is braked and the process proceeds to (311). (311) The motor M1 is normally rotated to wind the film. (312) The pulse counter of the EEPROM in the microcomputer CPU for film perforation detection is reset. (313) A timer in the microcomputer CPU (High winding time: 150 ms, Low winding time: 300)
ms) is set. As in (314), (119), and (130), the detection of the next perforation, that is, the change of the signal is detected by the timer (H
When winding up: 150 ms, when winding up Low: 300 m
If it is not within s), proceed to (315) and set a timer (High winding time: 150 ms, Low winding time: 300).
If it has changed within ms, proceed to (316). (315) The brake is applied to the motor M1, and the process advances to the [film rewind] routine. (316) EEPRO in microcomputer CPU
Count up the M pulse counter. (317) EEPRO in the microcomputer CPU
Compare whether the pulse counter of M has reached 8 or not,
If not reached, the process returns to (313), and if reached 8, the process proceeds to (318). That is, here is one of the films
Frame feed 8 Perforations are detected. (318) The brake is applied to the motor M1. (319) Timer in microcomputer CPU (High winding: 150 ms, Low winding: 300
ms) is reset. (320) EEPRO in the microcomputer CPU
The film counter of M is counted up, and the winding operation is completed.

Referring to FIG. 14, a [strobe UP] routine for up-driving the strobe to a position where it can emit light will be described. Similarly to (401) and (102), the voltage check is performed, and if NG, proceed to (103), and if OK, proceed to (402). (402) In this embodiment, since the photographer can directly raise the strobe unit manually, the SWS
It is determined by TUP whether or not the strobe unit has already risen to a position where light emission is possible, and if it has risen, charging is started, and strobe UP ends, and the process returns to (205). If not, go to (403). (403) The motor M2 is normally rotated to drive the strobe up. (404) The cam gear 71 is rotated by the forward rotation of the motor M2, and the operations of (A) to (D) of FIG.
L (leaf switch 72) is a microcomputer CP
It is supplied to the input port STCTL of U, and the signal becomes High →
The motor M2 rotates until it switches from Low to High, and when it switches, it proceeds to (407), and when it does not switch, it proceeds to (405). (405) Measure the time from the start of energization of the motor M2 to 5
When it exceeds 00 ms, the process proceeds to (406), and when it does not exceed 00 ms, the process returns to (404). (406) Display drive circuit DS from output port CSDSP
The serial signal is output to P, the strobe UP displays a warning of NG, and the process proceeds to the [STOP] routine (407) to brake the motor M2. (408) Here, it is determined by SWSTUP whether or not the strobe unit has actually risen to a position where light emission is possible. If it is Low, that is, charging is started, and strobe UP ends and the operation proceeds to (205). Return. Hi
gh, that is, if it has not risen, the process returns to (403), the normal rotation operation of the motor M2 is repeated, and even if it is repeated three times from the normal rotation of the motor M2 (403) to the brake (407), S
When WSTUP is still in the High signal state (40
Proceed to 6), and the strobe UP gives a NG warning display.

Next, referring to FIG. 16, the [film rewinding] routine will be described. Similarly to (501) and (102), the voltage check is performed, and if NG, proceed to (103), and if OK, proceed to (502). (502) Since the film is rewound by the reverse rotation of the motor M1, the transmission switching mechanism is changed depending on the phase of the cam gear 38 as shown in FIG.
It is determined whether or not it is in the rewinding state, and the phase of the phase substrate 40 is POCH 1: Low and POCH 2.
: If High, proceed to (506), and if different, proceed to (503). (503) The transmission switching mechanism at the time of reverse rotation of the motor M1 is shown in FIG.
To reverse the motor M2 so that
The cam gear 38 is rotated. (504) Due to the rotation of the cam gear 38, the phase of the phase substrate 40 becomes POCH 1: Low POCH 2.
: High, and when the transmission switching mechanism is in the rewinding state of FIG. 10, the process proceeds to (505), and POCH 1: Low and POCH 2 even after a predetermined time (1 s).
: If it does not become High, stop routine (99
Proceed to 9). When the signals are satisfied at (505) and (504), the motor M2 is braked. (506) The motor M1 is rotated in reverse to rewind the film. (507) The pulse counter of the EEPROM in the microcomputer CPU for film perforation detection is reset. (508) Timer 3 in the microcomputer CPU
Set 00 ms. Similar to (509), (119), (130), and (314), if the detection of the next perforation, that is, the change of the signal is not within the timer (300 ms), the process proceeds to (510), and the change is made within the timer (300 ms). To go to (512). (510) Brakes the motor M1 and proceeds to (511). (511) Output port CSDS due to some abnormality such as film tension during film rewinding.
A serial signal is output from P to the display drive circuit DSP to display a rewinding abnormality warning display, and the [STOP] routine (9
Proceed to 99). (512) EEPRO in microcomputer CPU
Count up the M pulse counter. (513) EEPRO in the microcomputer CPU
Compare whether the pulse counter of M has reached 8 or not,
When it has not reached 8, it returns to (508), and when it has reached 8, it proceeds to (514). That is, here one of the films
8 perforations for a piece are detected. (514) Timer 3 in microcomputer CPU
Reset 00ms. (515) EEPRO in the microcomputer CPU
Count down the M film counter. (516) EEPRO in microcomputer CPU
Whether or not the film counter of M has reached 0 is compared, and if not reached, the process returns to (508), and if reached 0, the process proceeds to (517). That is, here, it is detected whether or not the film has been rewound for the shooting frame. At (517) and (516), the brake is applied to the motor M1 2 seconds after the film counter reaches 0. (518) The motor M2 is reversely rotated so that the transmission switching mechanism at the time of normal rotation of the motor M1 is in the Low winding state of FIG.

Here, the motor M2 of the microcomputer CPU is controlled by the output port M2F "H" and M2R "L" in reverse rotation, the output port M2F "L" and M2R "H" in forward rotation, and the brake. Then output port M2
Let F be "H" and M2R be "H". (519) Due to the rotation of the cam gear 38, the phase of the phase substrate 40 becomes POCH 1: High and POCH.
2: Low, and the transmission switching mechanism is Low in FIG.
When the winding state is reached, the process proceeds to (520), and a predetermined time (1
s) Even POCH 1: High and PO
CH 2: If it does not become Low, proceed to the STOP routine (999). When the signals are satisfied at (520) and (519), the motor M2 is braked and the process proceeds to (521). (521) Display drive circuit DS from output port CSDSP
A serial signal is output to P to indicate the end of rewinding,
Proceed to the [STOP] routine (999).

When the sound pressure during one operation sequence of the camera is measured by the camera having the above-mentioned structure, the use of the helical tooth timing belt is about -7 dB lower than that of the conventional spur timing belt. It was confirmed by the experiment.

[0096]

As described above, the effects of the present invention as set forth in claims 1 to 3 are fixed to the output rotary shaft of the motor in the first stage reduction system which is most susceptible to vibration and noise in the power transmission system. Vibration and noise from the motor can be achieved by meshing a pulley having a helical gear shape and a pulley having a helical gear shape and a gear having a gear with a timing belt having a helical gear shape so that power can be transmitted. Can be reduced. In addition, since it is not necessary to separately support the motor in a floating manner as in the conventional example, there is no power transmission loss due to poor meshing.

First, as compared with the conventional spur tooth timing belt, by using a pulley having a helical tooth shape on the output rotary shaft of the motor, vertical movement of the motor output rotary shaft is reduced and vibration of the motor alone is suppressed. To be Moreover, by using a timing belt having a helical tooth shape in the first stage of the reduction gear system,
It is possible to reduce vibration and noise of the entire camera.

Further, in particular, the effect of the invention as set forth in claim 2 is that by providing a load receiving member for preventing a load in the thrust direction from being applied to the output rotary shaft of the motor, an extra load is applied to the motor. It has the effect of not causing damage and preventing accidents such as damage.

Furthermore, since the pulley having a helical tooth shape and the motor are not separately supported in a floating manner, it is possible to provide a power transmission mechanism for a camera with less power transmission loss due to poor meshing.

When the sound pressure during one operation sequence of the camera is measured, it is possible to provide a camera which is about -7 dB lower when using the helical timing belt than when using the conventional spur timing belt. Was confirmed by experiments.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mechanism of an embodiment of the present invention.

FIG. 2 is a perspective view showing the mechanism of the embodiment of the present invention.

FIG. 3 is a perspective view showing the mechanism of the embodiment of the present invention.

FIG. 4 is a perspective view showing the mechanism of the embodiment of the present invention.

FIG. 5 is a side view showing the mechanism of the embodiment of the present invention.

FIG. 6 is a side view showing the mechanism of the embodiment of the present invention.

FIG. 7 is a detailed view of the parts of the mechanism of the embodiment of the present invention.

FIG. 8 is a plan view of the switching transmission mechanism according to the embodiment of the present invention.

FIG. 9 is a plan view of the switching transmission mechanism according to the embodiment of the present invention.

FIG. 10 is a plan view of the switching transmission mechanism according to the embodiment of the present invention.

FIG. 11 is a plan view showing the operation of the strobe mechanism according to the embodiment of the present invention.

FIG. 12 is a circuit diagram of an embodiment of the present invention.

FIG. 13 is a flowchart of an embodiment of the present invention.

FIG. 14 is a flowchart of an embodiment of the present invention.

FIG. 15 is a flowchart of an example of the present invention.

FIG. 16 is a flowchart of an example of the present invention.

FIG. 17 is a flowchart of an embodiment of the present invention.

[Explanation of symbols]

MB ... Mirror box unit S ... Focal plane shutter unit, C ... Top cover M1, M2 ... Motor 1 ... Camera body 2 ... Pulleys 3, 16 ... Timing belts 4, 10, 12, 13, 14, 15, 31, 32, Three
3, 37, 41, 44, 45, 46, 70 ... Gear 5, 34, 50 ... Sun gear, 6, 8, 35, 51 ... Planetary gear 7, 9, 36, 52 ... Planetary lever 11 ... Spool 17, 73 ... Main plate 21, 43, 48, 60 ... Cover 18, 19 ... Switching lever 20, 62, 63, 64, 78 ... Torsion spring 22 ... Rewinding fork unit 23 ... Roller 24 ... Damper rubber 25 ... Step screw 26 ... Photoreflector 38, 55, 57, 71 ... Cam gear 39 ... Brushes 40, 61 ... Phase substrates 42, 47 ... Shafts 49, 53, 54 ... Worm gear 58 ... Mirror lever 59 ... Charge lever 72 ... Leaf switch 74 ... Strobe case 75, 76 ... Lever 77 ... Screw 79 ... Stopper pin 80 ... Toggle spring 81 ... Strobe light emitting unit 82, 83 ... Cover

Claims (3)

[Claims] 1. A motor, a first pulley that rotates integrally with an output rotation shaft of the motor, and has a helical tooth shape on an outer peripheral surface, and a rotation shaft that is substantially parallel to the first pulley. , A gear member having a second pulley portion having a helical tooth shape on the outer peripheral surface, and a gear portion that rotates integrally with the second pulley portion and has a gear formed on the outer peripheral surface, and an inner peripheral surface A timing belt having a helical shape and wound around the first pulley and the second pulley portion to transmit the rotational driving force of the motor to the gear member, and the rotation received by the gear member. A gear train portion to which a driving force is transmitted, and the first pulley, the second pulley portion, and the timing belt have helical tooth shapes having the same twist angle, and a mirror driving mechanism and a shutter. Charge mechanism, film winding mechanism, and film A power transmission mechanism for a camera, characterized in that at least one of the rewinding mechanisms is driven. 2. The camera according to claim 1, wherein load receiving members for preventing the first pulley from moving in the thrust direction are provided near both ends of the first pulley in the thrust direction. Power transmission mechanism. 3. The camera according to claim 1, wherein at least one of the first pulley and the second pulley has a flange portion having a diameter larger than an outer diameter of the pulley. Power transmission mechanism.