JPS62174731A - Motor controller for camera - Google Patents

Abstract

PURPOSE:To provide the same braking response as that in the use of a motor with small inertial force by using a normal motor and to improve the efficiency of space utilization by releasing a driving force transmission system from contacting a clutch means by a disengaging means. CONSTITUTION:The forward rotation output of a motor 1 rotates a gear clockwise through clutch parts K1 and K2, an initial-stage gear 3, and a gear train. The on-off signal of a sprocket switch 104 at the time of film winding is supplied to a counter 138. A plunger 2 is powered on to slide a shaft 1a downward and a clutch part K1 and a clutch K2 united with the gear 3 are disconnected. Consequently, a film fed constantly at any time regardless of the power source state right before power-on operation even after stop control is performed by a winding control circuit 144.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to a camera motor control device that controls a motor used as a drive source for, for example, film feeding.

(Background of the Invention) However, in order to control screen indexing by using the motor for film feeding, for example, after a screen indexing signal is generated, both ends of the motor are shorted and the motor is made to work as a generator. In most cases, the rotation caused by inertial energy is consumed as a current flowing through a coil to generate a braking force to control the screen indexing.

By the way, in the above-mentioned control method, the braking distance varies depending on the rotational speed of the motor just before applying the brake, resulting in large variations in the screen spacing of the film. The current flowing through the motor changes by about twice depending on the situation, and in low-temperature conditions, the electromotive force of the battery decreases and the film itself becomes hard, increasing the load for winding. Considering the combination of these conditions, There was a considerable difference in the rotational speed just before the motor stopped, and this difference had a large effect on the screen spacing of the film.

Furthermore, the moment of inertia of the motor has a large influence on the braking distance, and the smaller the moment of inertia, the smaller the braking distance, and as a result, the variation in screen spacing becomes smaller. From this point of view, cameras have been made that use coreless motors for film feeding, and their good braking performance has been proven, but coreless motors are not normally used due to manufacturing problems. Compared to a motor with a core (coreless motor), it costs five to ten times more, resulting in a significant increase in the product cost of the camera.

(Object of the Invention) An object of the present invention is to solve the above-mentioned problems, and to create a motor with a small inertia by using an ordinary motor with a large inertia, without using an expensive motor with a small inertia. It is an object of the present invention to provide a camera motor control device which can provide braking response equivalent to that when using a camera and which can also effectively utilize space.

(Features of the Invention) In order to achieve the above object, the present invention provides a motor that is fixed to the output end of a rotating shaft of a motor that is configured to be slidable in the axial direction, and that rotates in accordance with the movement of the rotating shaft in the axial direction. A clutch means for connecting and disconnecting the shaft and the driving force transmission system, a biasing means for biasing the rotary shaft in the axial direction, and a release means for releasing the biasing force of the biasing means are provided, and various operations can be performed. When the operation of the member is to be stopped, the release means is activated to immediately disconnect the clutch means from the driving force transmission system.

(Embodiments of the Invention) The present invention will be described below in detail based on illustrated embodiments.

1 to 4 show one embodiment of the present invention.
The figure is a mechanical configuration diagram of the motor control device. A rotating shaft la of the motor 1 is rotatably fitted with oil metals lb and lc, and a clutch portion is fixed to one end of the rotating shaft la. The motor outer cylinder 1d serves to prevent the magnetism generated by the magnet le from leaking to the outside, and forms a magnetic path (also a magnetic path of the plunger, which will be described later). A coil tg is wound around a core 1f formed of a magnetic material, and power is supplied to the coil tg from a power supply section (not shown) via a brush ih. Since the magnet le is arranged slightly below the core 1f, the rotating part of the motor 1 is always urged downward by its magnetic force.

The movable iron core 2a of the plunger 2 is slidably held by the pobbin 2b.1. Normally, it is urged upward in the figure by a spring 2C, and its head pushes up the rotating shaft 1a and clutch portion 1d of the motor 1 against the magnet if. FIG. 1 shows a state in which the coil 2d is energized and the yoke 2e is excited and attracts the movable iron core 2a. Note that 2f is a yoke, and 3 is an initial stage gear that holds 2 in a clutch part that meshes with 1 in the clutch part.

FIG. 2 is a diagram showing a driving force transmission system that transmits the output of the motor 1 to various operating members. It is located within the mopool 4. The gear 5 is integrally connected to the shaft 6a of the gear 6 in a two-way configuration or the like, and rotates when the output from the first stage gear 3 is transmitted via a gear train (not shown). gear 7
is rotatably supported by a shaft 8a implanted on the lower surface side of the gear 8, and meshes with the gear 6. The gear 8 is rotatably supported by the shaft 6a of the gear 6, and has the shaft 8a on the lower surface side as described above, and a circular shape having two notches ab, ab2 on the circumference on the upper surface side. It has a plate 8b integrally. Like the gear 8, the gear 9 is rotatably supported by a shaft 6a, and has an inner gear 9a and an outer gear 9b that mesh with the gear 6. The gear 10 is supported by a structural member (not shown) fitted into the hole 10a, and has one end at a spring hook part 10b and the other end at a spring hook part (not shown) provided on the lower surface of the gear 12. Although the gear 12 is biased counterclockwise by the respective hooked springs 11, the stoppers 10c and 12a are in contact with each other and are in the same position as shown in FIG. The gear 121 is coaxially supported with the gear lO and biased clockwise against the gear 10 by the spring 11, but as mentioned above, the stoppers 10c and 12a come into contact and are in the relative position as shown in FIG. The upper surface has a spring hook portion 12b and a stopper 12c, one end of which is provided on the spring hook portion 12b, and the other end of which is provided on the lower surface of the gear 13 (not shown).
The gear 1 is rotated by a spring 14 hooked on each
3, the stopper 12c is biased clockwise relative to 13
a and is in a relative position as shown in Fig. 2. The gear 15 that meshes with the gear 13 is a movable mirror 16.
It is constructed integrally with a mirror frame 17 that holds the mirror frame 17. Further, the gear 13 is connected to the converter lens frame (
It also meshes with a gear that rotates the motor (described later).

The gear 18 meshes with the outer diameter gear 9b of the gear 9 and the gear 19, and has a gear portion 18a on its lower surface that engages with a claw portion of a locking claw, which will be described later. Further, a lever 20 is rotatably attached to the shaft 18b. The gear 19 revolves around the gear 18, and the gear 18, the friction spring 21, the spring retaining ring 22, and the lever 20 constitute a known planetary gear mechanism. The locking claw 23 has a claw portion 23a that engages with the recessed portion of the gear portion 18a and an end portion 23b, and when the film is loaded, the film moves in the direction of arrow A (see FIG. 2). Button 2
When the end portion 23b is pressed by the pressing portion 24a of No. 4,
Contact pieces 25a and 25b constituting a film presence/absence switch to be described later are turned on. A gear 26 is a gear that transmits the output transmitted from the gear 19 to the film take-up spool 4 via a winding gear series (not shown), and a gear 27 transmits the output transmitted from the gear 19 via a rewinding gear series (not shown). The locking pawl 28, which is a gear transmitted to the illustrated fork, has a pawl portion 28a and an end portion 28b that engage with a notch portion 8b or 8b2 provided on the circumference of the disc 8b. When the end portion 28b of the tele/wide switching button 29 is pressed by the pressing portion 29a of the tele/wide switching button 29, which moves in the direction of arrow B (see Fig. 2) when operated by a person, a connection forming a tele/wide switching switch, which will be described later, is pressed. pieces 30a and 30
b is turned on.

Figure 3 is a cross-sectional view of the main parts of the camera incorporating the components shown in Figure 2 when viewed from the bottom, with Figure 3 (A) in the wide-angle state and Figure 3 (B) in the telephoto state. are shown respectively. A back cover unit including a known pressure plate and the like and a cover 31 are locked in the position shown in FIG. 3 by locking claws (not shown), and are integrally formed with a cover 32 having a photographing opening 32a. The camera body cover 33 includes a cartridge chamber 33a, a spool chamber 33b that stores the film winding Lisbourg 4, a rotation shaft hole 33C of the mirror frame 17 that holds the movable mirror 16, and a wide aperture 3.
3d, a telescopic aperture 33e, a light shielding part 33f, and the like. The movable mirror 16 held by the mirror PP17 has a pin portion 16a, a wide opening portion 16b, and the like.

Converter lens that plays the role of a convex lens in synthesis 34.3
The converter lens frame 36 containing the lens 5 has an axis 36,
If the wide side is selected by the operator, it will enter the photographing optical path as shown in Figure 3 (A), and if the tele side is selected. teeth,
It retreats behind the movable mirror 16 as shown in FIG. 3(B). The shutter 37 which also serves as an aperture blade is held by a base plate 38 . A lens barrel 42 having tele lenses 39, 40, and 41 is held in the position shown in FIG. 3 by an AF mechanism (not shown), and has a light shielding mask 43 integrally therein. The fixed mirror 44 functions to guide the light guided by the movable mirror 16 to the telescopic aperture 33e. 45 is A
A film roller plate for L, 46 is a strobe capacitor, and 47 and 48 are batteries.

FIG. 4 shows an example of a circuit configuration, in which 101 is a tele/wide selector switch constituted by the contact pieces 30a and 30b, and 102 is a switching operation of the movable mirror 16 and converter lens 34, 35 to predetermined positions. This is an operation completion detection switch that switches in conjunction with the switch. When the switch is switched to the wide side as shown in Figure 3 (A), the contact a side is in a conductive state, and when it is switched to the telephoto side as shown in Figure 3 CB). 103 is a known release switch; 104 is a known sprocket switch that is turned on and off by the movement of the film;
5 is a film presence/absence switch constituted by the contact pieces 25a and 25b; 106 to 111 are pull-up resistors; 1;
12-118 are inverters, 119-122 are one-shot circuits, 123-129 are AND gates, 130,1
31 is a wide switching circuit and a tele switching circuit constituted by RS flip-flops, and 132 is an or game 1-. 13
3 is a known AF@ path, 134 is an exposure control circuit, 135 is an AND gate, 136 is an OR gate, and 137 is an inverter.

138 is a counter that counts on/off signals of the sprocket switch 104 inputted from the AND gate 125, and outputs a high level signal indicating completion of feeding for one frame when 8 pulses are counted; 139 is inputted from the AND gate 126; 140 to 143 are OR gates; 140 to 143 are OR gates; 140 to 143 are OR gates;
4 is a winding control circuit that controls film winding via a motor control circuit 145 and motor l; 146 is an inverter 147 and an AND gate 148;
150 and 151 are OR gates; 152 is a pulse signal input from the oscillation circuit 153 via the AND gate 127; 154 to 156 are OR gates, 157 is an inverter, 158 is an AND gate, and 159 is a rewinding control circuit that controls film rewinding via the motor control circuit 145 and motor l. be.

Next, the operation will be explained. First, normal shooting will be described. When the photographer presses the release button, the release switch 103 is turned on and the inverter 1 is turned on.
15 becomes a high level signal, and the AF circuit 133
The exposure control circuit 134 and the exposure control circuit 134 sequentially operate to perform an AF operation and an exposure operation, and when the exposure is completed, a high level signal is output to one input terminal of the AND gate 135. After that, when the release button is released, the AND gate 13
Since high-level signals are input to all input terminals of 5,
A high level signal is output to 36 and 143. The exposure control circuit 134 is configured to output a high level signal for one fixed period of time even after the release switch 103 is turned off. When the output of the OR gate 143 becomes a high level signal, the counters 138 and 139 are reset, and when the output of the OR gate 136 becomes a high level signal, the winding control circuit 144 controls the motor 1 in the winding direction via the motor control circuit 145. Rotate (
(hereinafter referred to as forward rotation).

Song: Kuzu n) I'+n / Knee # + 4C
'iT: Write=+hbshx, bus-neutral force is applied to the clutch section, 2. The signal is transmitted to the gear 5 via the first stage gear 3 and a gear train (not shown), and the gear 5 begins to rotate clockwise (see FIG. 2). Since the claw portion 28b of the claw 28 is engaged and the gear 8 is in a non-rotatable state, the output of the gear 5 is transmitted to the gear 18 via the gear 6 and the gear 9, and the gear 18 is rotated clockwise. It starts to rotate. Then gear 1
9 revolves clockwise around the gear 18 and meshes with the gear 26, and its output is transmitted to the film winding Lisbourg 4 via the gear 26 etc., and winding of the film is started, and a sprocket (not shown) rotates. start. When the sprocket starts rotating, the sprocket switch 104 turns on and off repeatedly, and the signal is sent to the inverter 1.
16 and an AND gate 125 to input the counter 138 .

When the count content of the counter 138 reaches "8", the high level 4tJAr indicating that the winding of one frame of film has been completed, goes to λ. It is output to circuit 144.

As a result, the winding control circuit 144 outputs a low level signal to end the film winding operation, and stops the motor 1. At the same time, the output of the OR game 142 becomes a high-level signal, and the timer circuit 146 starts counting for a predetermined period of time. During this time, the output of the inverter 147 is inverted to a high-level signal, so the AND gate 148 outputs a high-level signal. is also at a high level. Therefore, transistor 149 is turned on, and plunger 2
is in a conductive state, that is, the yoke 2e in the plunger 2 is energized and attracts the iron core 2a against the bias of the spring 2C. The clutch part 1 and the clutch part 2 integrated with the first stage gear 3 are separated.

As a result, even if the motor 1 continues to rotate due to its inertial energy even after the stop control is performed by the winding control circuit 144, constant film feeding (screen indexing) is always performed regardless of the power supply state immediately before the power supply is stopped. becomes possible.

Incidentally, when a predetermined time has elapsed, the timer circuit 1
The output of the plunger 46 becomes high level, and this signal is input to one input terminal of the anti-gauge 148 via the inverter 147, so the transistor 149 is turned off and the plunger 2
Power is cut off.

Also, the timer circuit 146 is reset at the next film winding or rewinding.

Next, the time when the film ends, that is, the time when the shooting of the last frame ends will be described. When the photographing operation of the last frame is completed and the output of the AND gate 135 is reversed to a high level signal as described above, the output of the OR gate 136 also becomes a high level signal, and the motor 1 is driven and controlled by the winding control circuit 144 and the motor control circuit 145. , it starts to rotate forward. When the motor l begins to rotate forward, the sprocket switch 104 repeats on and off as described above, and the on/off signal is input to the counter 138 via the inverter 116 and the AND gate 125, which counts up to the number corresponding to l frame feeding. Although it starts working.

During feeding, the film becomes tensioned and the on/off signal of the sprocket switch 104 is no longer input, so the count does not reach "8" and the output does not invert to a high level signal.At the same time, the one-shot circuit Since the on/off signal of the sprocket switch 104 is no longer input to 120, the counter 153 is no longer reset via the OR gate 151, and therefore the counter 152 is reset to the specified number by the AND gate 127.
The pulse signal input from the oscillation circuit 153 is counted through the OR gate 154 when a predetermined number is reached.
A high level signal is output to the rewind control circuit 159 via the rewind control circuit 159. As a result, the rewind control circuit 159 rotates the motor 1 in the rewind direction (hereinafter referred to as reverse rotation) via the motor control circuit 145. Furthermore, when the rewind control circuit 159 starts outputting a high level signal, Winding control circuit 14
4 is reset and its output becomes a low level signal.

As mentioned above, when the motor 1 starts to rotate in reverse, its output is transmitted to the clutch section, 2. The signal is transmitted to the gear 5 via the first stage gear 3 and a gear train (not shown), and the gear 5 begins to rotate counterclockwise. At this time, for example, a notch 8b2 provided in the disc 8b
Since the claw portion 28b of the locking claw 28 is engaged with the gear 8 and the gear 8 cannot rotate, the output of the gear 5 is transmitted to the gear 6,
The signal is transmitted to the gear 18 via the gear 9, and the gear 18 begins to rotate counterclockwise. Then gear 19 becomes gear 18
The film revolves counterclockwise around the film and meshes with a gear 27 as shown in FIG. 2, and its output is transmitted to a fork (not shown) via the gear 27 and the like, and the rewinding of the film is started.

As mentioned above, when the film begins to rewind, the sprocket begins to rotate, and as a result, sprocket switch 1
04 repeatedly turns on and off, and the signal is sent to the counter 152 via the one-shot circuit 120 and the OR gate 151.
However, since the output of the first rewind control circuit 159 is held at a high level signal, rewinding of the film continues. Also, the on/off signal for the sprocket switch 104 is sent to the inverter 116.
is input to one input terminal of the AND gate 125 via
Since the output of the last spring return control circuit 159 is at a high level, the output of the inverter 118 is at a low level.

Therefore, no pulse signal is input to the counter 138.

When the film is completely rewound into the cartridge as described above, the film presence/absence switch 111 is turned off, a high level is input to one input terminal of the AND gate 158, and an inverter is input to the other input terminal. Since a high level signal is input through the AND gate 157, a high level signal is outputted from the AND gate 157 to the reset terminal of the rewind control circuit 159 via the OR gate 156, thereby stopping the motor 1.

Next, the switching operation between tele and wide will be explained. When the camera is in the wide mode as shown in FIG. 3(A), if the photographer presses the tele/wide switch button 29 to switch to the tele side, the locking claw 28 will move counterclockwise. At the same time, the claw portion 28a is removed from the notch portion 8b2 provided in the disc 8b of the gear 8, and at the same time, the contact pieces 30a and 30b are in a conductive state, that is, the tele/wide changeover switch 101 is turned on, and the inverter 112 is turned on. Since the output of is inverted to a high level signal, a high level signal (pulse signal) is momentarily outputted from the one shot circuit 119 to the AND gates 123, 12'4 and the OR gate 143. This resets the counter 139. Also, at this time, since the movable mirror 16 and the like are on the wide side, the operation completion detection switch 102 makes the contact a conductive.

Therefore, the output of the AND gate 124 becomes a high level signal, and the tele-switching circuit 131 is set.
A high level signal is output to the winding control circuit 144 through the motor control circuit 145, and upon receiving this signal, the winding control circuit 144 rotates the motor 1 in the normal direction through the motor control circuit 145.

When the motor 1 starts to rotate forward, its output is transmitted to the clutch section, 2., as described above. The signal is transmitted to the gear 5 via the first stage gear 3 and a gear train (not shown), and the gear 5 begins to rotate clockwise. At this time, the claw part 28b of the locking claw 28 is removed from the notch part 8b2 provided in the disc 8b, so the gear 8 is in a rotatable state, and the output of the gear 5 is transmitted through the gear 7. It acts in a direction to rotate the gear 8 counterclockwise. However, at this time, since the film is loaded and the claw part 23a of the locking claw 23 has come out of the recess provided in the gear part 18a of the gear 18, the output of the gear 6 is first transmitted through the gears 7 and 9. The force is transmitted to the gear 18, and acts as a force to rotate the gear 18 clockwise. When the gear 18 rotates clockwise, the gear 19 revolves clockwise until it meshes with the gear 26, and the output from the gear 18 is transferred to the gear 26.
When trying to rotate the film take-up spool 4 by transmitting the signal to Since the switching force for switching the lenses 34 and 35 is configured to be smaller, the subsequent output of the gear 6 moves in the direction of rotating the gear 8 counterclockwise via the gear 7 as described above.

When the gear 8 begins to rotate counterclockwise, the claw portion 28a of the locking claw 28 rides on the outer circumferential portion 8b3 of the disc 8b to maintain the conductive state between the contact pieces 30a and 30b, and the gear 10
．． Gear 12. Gear 15 is rotated clockwise via gear 13. Eventually, the movable mirror 16 returns to the state shown in FIG. 3(B).
When the converter lenses 34 and 35 reach the contact point, the operation completion detection switch 102 switches to the contact side, and the claw portion 2'8a of the locking claw 28 falls into the notch 8b of the disc 8b. As described above, the gear 8 is no longer able to rotate, the contact pieces 30a and 30b are no longer electrically connected, and the tele-φ wide changeover switch 101 is turned off. It goes without saying that the finder (not shown) is also switched in conjunction with the switching of the movable mirror 16 and converter lenses 34 and 35. Furthermore, in order to absorb the slight stroke difference between the movable mirror 16 etc. and the gear 6, the distance between the gear 12 and the gear 13 is (
Gear 10 and gear 1 when switching from telephoto side to wide side
2) moves a small amount due to spring force. That is, the gears 12 and 13 are used to allow the movable mirror 16 and the like to escape after first coming into contact with a stopper (not shown).

As mentioned above, when the gear 8 becomes unable to rotate due to the claw portion 28a of the locking claw 28 engaging with the cutout portion 8b of the disk 8b, the output of the gear 6 is entirely transferred to the gears 7, 9, . The signal is transmitted to gear 26 via gear 18 and gear 19. As a result, the film winding Lisbourg 4 begins to rotate, a sprocket (not shown) rotates, and the film begins to move until the frame to be used for the next photograph reaches the position of the telephoto side aperture 33e. Also, when the sprocket rotates, the sprocket switch 104 repeatedly turns on and off.

At this time, since the output of the OR gate 132 is a high level signal, the ON/OFF signal is output from the AND gate 126 to the counter 139, and the counter 139 counts the number. After that, when the film (the frame to be used for the next shooting) finishes moving the distance from the wide-side aperture 33d to the telephoto-side aperture 338, the count content of the counter 139 becomes "l".
0'', a high level signal indicating that the movement of the film has been completed is output from the counter 139 (or game) 1
It is output to the winding control circuit 144 via 42, 141, and 140. As a result, the winding control circuit 144 outputs a low level signal to stop the motor l. At the same time, as described above, the output of the OR gate 142 becomes a signal at the no level, so that the timer circuit 146
starts counting operation for a predetermined period of time, and during this time the transistor 149 is turned on, just as when one frame of film has been fed.
The yoke 2e inside the plunger 2 is energized and attracts the iron core 2a against the bias of the spring 2C, and the rotating shirt (la) also slides downward with the help of the downward suction force of the magnet 1e. Since the clutch unit 1 and the clutch unit 2 integrated with the first gear 3 are separated, the film winding Lisbourg 4 is stopped immediately regardless of the inertial rotation of the motor 1.

Next, when the camera is in the telephoto mode as described above, the photographer presses the tele/wide switch button 2 to switch to the wide side.
When the pressing operation 9 is performed, the locking pawl 28 rotates counterclockwise, and the pawl 28a is removed from the notch 8b provided in the disk 8b of the gear 8, and at the same time, the contact piece 30
a and 30b are in a conductive state, that is, the tele/wide selector switch 101 is turned on, and the output of the inverter 112 is inverted to a high level signal, so that the one-shot circuit 119 momentarily sends a high level signal to the antenna gates 123, 124 and the OR gate 143. A signal (pulse signal) is output. This resets the counter 139. In this case, as described above, the operation completion detection switch 102 has switched to the contact state, so the output of the inverter 113 is a high level signal, and therefore the output of the AND gate 123 is a high level signal, and wide switching is performed. Circuit 130 is set. When set in this way, the wide switching circuit 130 outputs a high level to the rewind control circuit 159 via the OR gate 154, and upon receiving this signal, the rewind control circuit Q159 reverses the motor l via the motor control circuit 145. let

When the motor l begins to rotate in reverse, its output is transferred to the clutch section.
, to 2. Gear 5 via first gear 3 and a gear train (not shown)
, and gear 5 begins to rotate counterclockwise. At this time, the notch 8b provided in the disc 8b and the claw 28b of the locking claw 28 are removed, so the gear 8 is in a rotatable state, and the output of the gear 5 is transmitted via the gear 7. Said gear 8
It will work in the direction to rotate the clockwise. However, at this time, the film is loaded and the claw part 23a of the locking claw 23 is disengaged from the four parts provided on the gear part 18a of the gear 18, so the output of the gear 6 is first transmitted through the gears 7 and 9. When the gear 18 rotates counterclockwise, the gear 19 revolves counterclockwise to a position where it meshes with the gear 27, and the force from the gear 18 is transmitted to the gear 18. An attempt is made to transmit the output to the gear 27 to rotate the cartridge winding shaft via a fork (not shown), but the force of the gear 10. Gear 12. Since the switching force for switching the movable mirror 16 and the converter lens 34, 35 through the gears 13 and 15 is smaller, the subsequent output of the gear 6 causes the gear 8 to move clockwise through the gear 7. (move) in the direction of rotation.

When the gear 8 begins to rotate clockwise, the claw portion 28a of the locking claw 28 rides on the outer peripheral portion 8b of the disc 8b and touches the contact piece 3.
0a and 30b are maintained, and the gear 10.
Gear 12. Gear 15 is rotated counterclockwise via gear 13. Eventually, the movable mirror 16 returns to the state shown in FIG. 3(A).
When the converter lenses 34 and 35 reach the position, the operation completion detection switch 102 switches to the contact a side, and since the claw part 28a of the locking claw 28 falls into the notch part 8b2 of the disc 8b, the gear 8 can no longer be moved. is no longer able to rotate, and the contact pieces 30a and 30b are no longer electrically connected, and the tele/wide selector switch 101 is turned off.

As described above, when the gear 8 becomes unable to rotate due to the claw portion 28a of the locking claw 28 engaging with the cutout portion 8b2 of the disk 8b, the output of the gear 6 is all transferred to the gears 7, 9, . The signal is transmitted to gear 27 via gear 18 and gear 19. As a result, the fork (not shown) rotates and the film begins to move, and accordingly, the sprocket (not shown) rotates, and the frame to be used for the next shooting moves until it reaches the position of the wide-side aperture 33d. start. Also, when the sprocket rotates, the sprocket switch 104 starts to turn on and off repeatedly, and at this time, the or gate 132
Since the output of is a high level signal, AND gate 12
6 outputs the on/off signal to the counter 139,
The counter 139 counts the number. After that, when the film (the frame to be used for the next shooting) finishes moving the distance from the telephoto side aperture 33e to the wide side aperture 33d, that is, when the count content of the counter 139 reaches "10". , a high level signal indicating that the movement of the film has been completed is output from the counter 139 to the rewind control circuit 159 via OR gates 155, 156, and 154. As a result, the rewind control circuit 159 outputs a low level signal to stop the motor l. At the same time, the output of the OR gate 142 becomes a high level signal, causing the timer circuit 146 to start counting for a predetermined period of time. During this time, the transistor 149 is turned on, and as described above, the plunger 2 is excited and the rotating shaft 1a is moved downward. The clutch part Kl and the clutch part 2 are separated by sliding. Therefore, the fork (not shown) stops quickly regardless of the inertial rotation of the motor 1.

Next, a case will be described in which the telephoto and wide-angle switching operations are performed as described above with no film loaded in the camera. As mentioned above, when the photographer operates the telephoto wide switching button 29, a high-level signal is momentarily output from the one shot limit circuit 119, and when the camera is in the telephoto mode, the wide switching circuit 130 is output. A circuit 159 for controlling rewinding is set via a telephoto switching circuit 131, etc. when the camera is in wide-angle mode, and a circuit 159 for controlling winding via a telephoto switching circuit 131 is set. Drive control of the motor l is performed. Thereafter, when the movable mirror 16 and the converter lens 34.35 are switched to the desired state by the above-described operation, the switching operation detection switch 102 is switched to the contact side, and the inverter 113 or 114 is switched to the contact side.
The output of is inverted to a high level signal. Then, the one-shot circuit 121 or 122 generates an AND gate 128.
or game) 155, 156 or ANDGATE 129.
A high level signal is momentarily outputted via the OR gate 140, and the rewind control circuit 159 or the winding control circuit 144 is reset. As a result, the motor 1, which was rotating in the specified direction, stops.

According to this embodiment, when controlling film screen indexing using the motor 1 as a drive source, the power to the motor 1 is stopped, and at the same time, the plunger 2 is energized and the clutch section is set to 1 and the first gear 3. 2 is separated from the integrated clutch part so that the difference in rotational force due to the inertia of the motor l caused by the voltage state of the battery 47, 48 and the external environment such as temperature and humidity is not transmitted to the film winding Lisbourg 4 or the fork. Therefore, even if an inexpensive cored motor is used, braking response comparable to that of a coreless motor can be obtained, and a camera with high cost performance can be provided. In addition, since the output part of motor 1, which has the smallest shaft output value in the feed system, is configured as a clutch, the switching force is much smaller than a configuration in which the clutch is switched in the middle of the gear train. (this is also related to the fact that the magnet 1e is placed slightly below the core if), the plunger 2 can be made inexpensive (even a weak one can be used), and its shape can also be made smaller. can do. Therefore, it is possible to arrange the plunger 2 as described above in the axial direction of the rotary shirt (la) and on the opposite side of the output end to which it is fixed to the clutch portion, so that it can be arranged integrally with the motor 1. As a result, it can be stored in the film winding Lisbourg 4, and space can be used effectively.

Furthermore, since the structure is designed to allow sliding of a member such as the rotating shaft 1a of the motor 1, the fitting portion of which is machined with high precision and the fitting length (between the oil metal 1b and the IC) is long, A stable structure can be achieved.

(Correspondence between the invention and the embodiments) In this embodiment, the clutch portion K l + K 2 serves as the clutch means of the present invention, the spring 2C serves as the urging means, and the iron core 2a to yoke 2f excluding the spring 2C serve as the release means. They correspond to each other.

(Modified example) In this example, the configuration is such that the clutch is switched during film feeding, but the configuration is not limited to this.
For example, a motor is used as the driving source.

A similar effect can be obtained by using it for controlling a shutter drive, a photographic lens drive, or the like.

(Effects of the Invention) As explained above, according to the present invention, the motor is fixed to the output end of the rotating shaft of the motor configured to be slidable in the axial direction, and rotates in accordance with the movement of the rotating shaft in the axial direction. A clutch means for connecting and disconnecting the shaft and the driving force transmission system, a biasing means for biasing the rotary shaft in the axial direction, and a release means for releasing the biasing force of the biasing means are provided, and various operations can be performed. When stopping the operation of the member, the release means is activated to immediately disconnect the clutch means from the driving force transmission system, so the inertia force is small.
Without using an expensive motor, it is possible to use a normal motor with a large inertial force to provide the same braking response as when using a motor with a small inertial force.

In addition, since the biasing means and the releasing means can be arranged axially on the rotating shaft of the motor and on the opposite side of the output end, they can be arranged integrally with the motor, making effective use of space. can be achieved. In particular, when the motor is housed within the spool, the biasing means and the release means can also be housed within the spool, making it possible to effectively utilize the dead space within the spool.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a motor and plunger showing an embodiment of the present invention, and FIG. 2 is a mechanical configuration diagram of the main parts.
FIG. 3 is a diagram illustrating the telephoto or wide-angle state of a camera equipped with the present invention, and FIG. 4 is a circuit diagram thereof. ■・・・Motor, 2・・・Plunger,
3... First stage gear, 4... Film winding Lisbourg, 5~lO, 12, 13, 15...
Gear, 16... Movable mirror, 26.27...
...Gear, 29...Tele-wide switching button, l
ot...Tele/wide selector switch, 102.
...Switching operation detection switch, 109...
Release switch, 144... Rewind control circuit, 146... Timer circuit, 147...
...Inverter, 148...AND gate, 149...Transistor, 159...
・Rewind control circuit, K, 2...Clutch section. Patent Applicant Canon Co., Ltd. Agent Minoru Nakamura (Figure 2 Figure 3 (A) Old Figure 3)

Claims (1)

[Claims] 1. In a camera motor control device comprising a motor that serves as a drive source for various operating members and a driving force transmission system that transmits the output of the motor to the operating members, the motor control device is configured to be slidable in the axial direction. a clutch means fixed to the output end of the rotating shaft of the motor and connecting/disconnecting the rotating shaft and the driving force transmission system according to the axial movement of the rotating shaft; and an urging force that urges the rotating shaft in the axial direction. 1. A camera motor control device comprising: a means for controlling a motor; and a releasing means for releasing the urging force of the urging means.