JPS60198524A - Fixed length rewinding circuit of auxiliary winding-type camera - Google Patents

Abstract

PURPOSE:To develop automatically all frames of a film by ignoring at least the signal of the first frame to set a photographic mode with the next frame feed end signal when frames are fed after the end of auxiliary winding in an auxiliary winding-type camera. CONSTITUTION:When a cartridge is loaded and the film is arranged on a running path, a switch (SW) SR is connected to a contact (b), and an SWSF is turned on. When a rear cover is closed and an SWSC is turned on, a current is flowed to a relay switch RLC and a motor 2 to perform auxiliary winding. The current is flowed to resistances R1 and R2 and a diode 420 also, and a transistor TR404 is turned on, and a signal F is inputted to a motor control logic 400. An output D of the logic 400 is set to the high level to turn on a TR408, and turning-on of the TR404 is self-held, and the current is flowed to the logic 400 continuously. After auxiliary winding is terminated, the SWSR is connected to a contact (a), and an output C of the logic 400 goes to the high level to turn on a TR406, and the contact of the relay RLC is switched to a contact NO, and the motor is reversed to make automatic development of all frames possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fixed-length rewind circuit after completion of pre-winding of a pre-winding type camera.

[Prior art]

In an automatic developing device that automatically develops photographed film, there is a problem in that approximately one frame of film cannot be properly developed at the end of the film wound around the cartridge. By the way, in a general camera, that is, a pre-winding type camera, the one frame that is not processed is the last of the film, so it is not a big problem. However, in a pre-winding type camera, the one frame that is not processed is the first frame of the film, and it is a serious problem for the photographer if this is not properly processed.

[Purpose of the invention]

The present invention was developed in view of the above-mentioned problems of conventional pre-winding cameras, and is configured such that after completing the pre-winding, the film is rewound by a predetermined amount into the cartridge before the first photograph is taken. [Structure of the Invention] The present invention has the following four features in order to achieve the above object. That is, the present invention, with reference to FIG.
After loading the film and prior to shooting, the film is continuously wound onto the spool using the pre-winding mode, and then the film is wound one frame at a time using the shooting mode. ) In a pre-winding camera that takes pictures while rewinding the film, a pre-winding mode P end detection means A detects the end of the pre-winding mode and outputs a pre-winding mode end signal, and detects the end of frame advance of the film. A frame feeding end detection means B outputs a frame feeding end signal, and outputs a rewinding signal upon input of the preliminary winding mode end signal, and outputs a rewinding signal at least after inputting the preliminary winding mode end signal. & a rewind control means 0 which ignores the input of the first frame speed end signal and stops outputting the rewind signal upon input of the next frame speed end signal, and controls the chain rewind signal. The camera is configured to control the film rotation thread 0, and ignores at least the first frame advance end signal in the shooting mode, so that the film nogtrone winding 1 is performed.
N! For example, an empty copy portion for one frame can be provided in +.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. In this example, when /f trone is loaded, it comes out of the cassette and h
This system has been adopted in cameras that automatically send the leading edge of the film to the spool and start prewinding, and it requires a film drive system, frame feed counter system, and control circuit to perform prewinding and rewinding of the film. include.

(Film Drive System) The film drive system includes a drive motor 2 disposed inside the spool 1, an output gear 6 attached to the output shaft 4 of the drive motor 2, as shown in FIG. 2 for the pre-winding motor P. It includes a reduction gear train 8r that meshes with the output tooth jli6. The film drive system also includes a torque sensing lever 12 and an arm member 18 coaxially supported with respect to the integrally mounted first sun gear 14 and second sun gear i16. [Torque detection lever] 2-piece, 1st sun gear] 1st planet gear that meshes with 4]
] and the torque detection lever]
The coil spring 26 engages the biasing arm 5 24 in order to rotationally bias the coil spring 26 in the counterclockwise direction in FIG. It has a working arm]7. The second planetary gear 20 is in mesh with a driving gear 22 of a preliminary winding spool shown in FIG.

With the above configuration, the drive motor 2 rotates counterclockwise in FIG. 2 to perform preliminary winding of the film. When the preliminary winding is completed, that is, the film 34 is
When the film 34 is no longer fed out, the rotation of the spool 1 is stopped by the film 34. after that,
The rotation of the reduction gear train 8 is continued, and the counterclockwise rotation of the gear 0 causes the first planetary tooth ! 31 moves clockwise in FIG.
The planetary gear 20 and the drive gear 22 of the spool 1 are disengaged.

When switching to the photographing mode under the control of the control circuit, the drive motor 2 rotates in the opposite direction to that in the pre-winding mode, and the second planetary gear 20 moves to the position shown by the imaginary line 20' in FIG. do. The film rewinding mechanism operating in the shooting mode applies the driving force from the reduction gear train 8 to the first planetary gear 11, the first and second sun gears 14, 16, and the gear 20 in the position shown in the image @20'. The signal is configured to be transmitted to the transmission gear train 30 via the transmission gear train 30. The last gear 36 of the transmission gear train 30 meshes with a cartridge drive gear 40 for rotating the winding shaft 38 of the arm trone 32 . Also.

One gear 42 of the transmission gear train 30 meshes with a counter drive gear 44 for driving a film counter system.

On the other hand, in the lower position of the spool 1 and the film 34,
A film feeding tube 50 is provided for feeding the leading end of the film 34 to the spool 1 at the beginning of the preliminary winding mode. The film feeding device 50 includes a gear 52 attached to the lower end of the spool 1, an idle gear 54 that meshes with the 1-meter wheel 52, a one-way gear set M5G that meshes with the idle gear 54, and an output gear 58 of the one-way gear set 56. Idle gear meshing with 60. and idle gear 6
and a drive belt device 62 driven by a motor.

The drive belt assembly W62 is configured to cause a part of an endless belt 74 having a plurality of protrusions 72 that fit into the perforations 70 of the film 34 to run parallel to the film 34. The one-way gear device 56 includes a human-powered gear 64 and an output gear 58 coupled via a one-way clutch 66. .

In the above configuration, when the pre-winding mode is started by loading the main roller 32 into the camera, the drive motor 2 and the spool 1 rotate, and at the same time the drive bell) loading fiffi 6
2 feeds film 34 to spool 1.

Then, when the leading end of the film 34 reaches the spool 1 and the spool 1 winds up the leading end of the film 34 by a device (not shown), the film 34 is wound up by the spool 1 without being restricted in any way by the drive belt assembly w62.

A sliding member 500 that is slid by the film 34 is provided on the side of the film running path, and the sliding member 500 operates the film detection switch SF.

(Transmission Sequence Counter System) The frame recounter system rewinds the film by one frame each time it is taken, and counts and displays the number of film frames. As shown in FIG.
0 and a sprocket (102) fixed to the lower end of the sprocket shaft 100. The sprocket 102 is arranged so as to engage with the -(-) deflection of the loaded film, and the sprocket shaft 100 is rotated to follow the travel of the film.

The operating arm 122 that partially operates the switch S0 is pivoted by a pin 123, and the fifth
The tin rocket shaft 100 is biased counterclockwise in the figure, and a protrusion 124 that fits into a recess 128 provided in the tin rocket shaft 100 is provided in the middle of the protrusion 124 . In the above configuration, when the film runs and the sprocket 102 rotates, the protrusion 124 fits into the recess 128 every time the film runs for one frame, and the one-frame switch S0 turns OFF. Sufu 60
Hereinafter, the percentage of the circumferential angle range in which the recess 128 of the butt shaft 100 is not provided will be expressed as α.

A small diameter portion 130 is provided at the upper end of the Sugerocket shaft 100, and the film counter drive gear 44 shown in FIG. 1 is pivotally supported here. On the other hand, a counter gear 132 is fixed to the uppermost end of the small diameter portion 130, and a spring 134 is disposed between the film counter drive gear 44 and the counter gear 132 to form a friction clutch. .

The counter gear 132 meshes with an idle gear 202 that is pivotally supported by a pin 212, and the idle gear 202 is a counter feed gear 2 that is integrated with a one-tooth rotating member 204 made of an elastic body.
It meshes with 06. The counter feed gear 206 is supported by a swinging member 352 which is pivotally supported by the pin 212 and urged counterclockwise in FIG. 5 by a coil spring 350.
The one-tooth rotating member 204 is pivotally supported on the top of the bin 3.
The outer teeth 20 of the counter plate 210 are pivotally supported by 54.
It meshes with 8.

A pin 214 is installed on the lower surface of the counter plate 210, while a camera is mounted on the stone 14 pier 216 on the diagonal (not shown).
is planted, and the contact between the bin 214 and the stock/arm bin 216 causes the counter plate 210 to be at the initial position W (E, that is, no film is displayed) (some counters display S, but the following are representative examples) (referred to as f&E) can be determined. The counter plate 210 is also It is biased clockwise in FIG. 3 by a coil spring (not shown).

Therefore, regardless of the number of sheets displayed on the counter board 210,
When the one-tooth rotating member 204 and the outer tooth 208 are released from engagement and become unrestrained, they immediately return to the position shown in E.

The back cover 3 is attached to the end of the swinging member 352 on the counter plate 210 side.
A sliding plate 362 interlocking with the opening/closing movement of 60 is in contact with the sliding plate 362 . Fii by sliding one plate 362Fi coil spring 364
360, the biasing force of the coil spring 364 acting on the swinging member 352 via the sliding plate 362 is larger than the biasing force exerted by the coil spring 350. Therefore, when the back cover 360 is opened, the rocking member 352 follows the back cover 360 and swings counterclockwise in FIG. 3.

The engagement between the first tooth rotating member 204 and the outer tooth 208 is released, and the counter plate 210 shows the display E. The mode changeover switch SR1, which is connected to the mode contact a and connected to the preliminary winding mode contact by Torrone extraction, is turned OFF→O every time the film travels one frame.
1-piece switch S that goes from N to OFF. , a film detection switch SF that turns on when the film is on the film travel path, a relay RL for changing the direction of current to the drive motor 2, and its relay switch RLC%J [switch Sc
, motor control logic 400. It consists of a light source 402, four transistors 404, 406, 408% 410, a shutter control circuit 412, diodes 420, 422, and a front cover x 7 SMt-g4 connected as shown in the figure.

In the above control circuit, when the cartridge is loaded into the camera with the mode changeover switch SR connected to the pre-winding contact bK by removing the cartridge and the film is placed on the film travel path, the film detection switch S is turned ON. When the back cover is closed and the back cover switch Sc* is turned on, current flows through the back cover switch Sc, the relay switch RLC connected to the normally closed contact NC, and the drive motor 2. It flows through the mode changeover switch SR and film detection switch S connected to the preliminary winding contact, and preliminary winding is performed.

When the back cover switch Sc is turned on, current flows through the resistor 404R1 connected to the terminal of the transistor 404.
, 404R2, the diode 420% mode changeover switch SR, and the film detection switch SF, the transistor 404 is turned on, and the motor control logic 400 receives an irregularity signal. The transistor 408 is turned ON with the output voltage being I.
04 is kept ON, and the constant supply of motor control logic 400 is kept.

When the preliminary winding is completed, the mode changeover switch SR is connected to the photographing mode contact point by the action of the torque detection lever 12, and the rotation of the drive motor 2 is stopped. On the other hand, the potential at point ^, which was at a low level during preliminary winding, is changed by switching the connection to the shooting mode contact island of the mode changeover switch SR.This is the motor control logic 4.
00 is man-powered. The motor control logic 400 also includes a 1-frame switch S that turns OFF every time the film runs one frame, that is, becomes irregular. The output signal B of is input manually.

The motor control logic circuit 400 turns on the transistor 4 when the high level of the signal ^ is input manually according to the logic described below.
Turn on the transistor 406 using the signal C input to the base of 06 as a high-rail signal, and thereby turn on the serial relay RL.
is excited, the relay switch RLC is connected to the normally open contact NO, and the current is passed through the camera back switch Sc, the mode changeover switch SR connected to the shooting mode contact a, and the drive motor 2.
It flows through the relay switch RLC connected to the normally open contact NO and performs rewinding.

As will be explained later in detail based on a flowchart, the motor control logic circuit 400 outputs the output signal C10 when the second high level of the output signal B is manually input from the 1-frame switch S0, that is, when a predetermined rewind is performed. The transistors 406 and 408 are turned off by setting the level to low.

This demagnetizes the relay RL, and the relay switch RL
C is connected to the normally closed contact NC, and the rotation of the drive motor 2 is stopped.

Also, transistor 404 is turned off and operation of motor control logic 400 is stopped. At this point, the desired rewinding is completed and the preparation for photographing the first frame is completed.

When the shutter release control circuit 412 is supplied with current by removing the front cover and turning on the front cover switch SM, the shutter release control circuit 412 outputs the signal output to the transistor 410. Turn on E/S to turn on transistor 410.
However, due to the breakage, the transistor 404 is turned on. On the other hand, the motor control logic 400 sets the signal 0 to a high level, turns the transistor 406 ON, energizes the relay RL, connects the relay switch RLC to the normally closed contact No, and performs rewinding. When rewinding is performed for one frame, the 1-frame switch S0 goes to 0FFL and the signal B goes to high level, causing the motor control logic 400 to set the output signals C and D to low level and drive in the same manner as described above. motor 2
rotation stops. This means that Komagome's regular shooting has ended.

Next, the operation of motor control logic 400 will be explained. The first example of operation is one in which the amount of rewinding is 1 or 2 frames, and a flowchart is shown in FIG. 5, and timing is shown in FIGS. 6 and 7. Here, FIG. 6 ti1 piece switch S0
When is OFF, preliminary winding is completed and (1+α) or 2
FIG. 7 shows the timing when a frame is rewinded, and FIG. 7 shows the timing when the preliminary winding is completed when the one frame switch S0 is OFF and the rewinding of 1 or 1+α) frames is performed.

First, the motor control logic 4000 is held at the source with the signal set to 1, ie, irregular.

Next, it is determined whether the signal ^ is at a low level, that is, whether the drive motor 2 is connected to the pre-winding mode P (9).If it is determined that the signal ^ is at a low level.

Next, determine whether the signal ^ is irregular or not, and...
If the condition is not correct, wait until the preliminary winding is completed and the signal ^ becomes high level.

When the pre-winding is completed and the signal ^ becomes ``Irrelevant'', the signal C is set to ``Iraeru'', and then it is determined whether the signal B is ``Low Rail'', that is, the 1-frame switch is ON, and the signal B is
If it is not low level, it waits until it becomes low level. When Haku 458 becomes Loure Kururu, next signal B...
Determine whether it is illegal or not (if No. A and B are illegal) wait until it becomes illegal. Signal B
When it becomes I-I, it is determined again whether the signal 8 is at the low level or not, and if the signal B is not at the low level, it becomes low.
Wait until the level is reached. When signal 8 becomes low level, it is determined again whether the signal date is . . .
If signal B is not erroneous, wait until it becomes erratic. .

When signal B reaches - level, signal C is set to low rail, excitation of relay RL is stopped, and relay switch RLC
is connected to the normally closed contact NC to stop the rotation of the drive motor 2, and the signal O is set to low level to cut off the power supply to the motor control logic 400. It becomes Jin who has finished rewinding 1 or 2 frames by sliding.

On the other hand, when it is determined whether the signal ^ is at low level or not, and when it is not low level, that is, when the drive motor 2 is connected to the photographing mode, the signal C is set to high level, turning the transistor 406 ONL and energizing the relay RL. Connect relay switch RLC to normally closed contact NO to connect drive motor 2.
is rotated in the rewinding direction to perform rewinding by normal shooting. Next, in the first determination of whether the signal e is at a high level or not, the process jumps to the step for the case where the signal e is at a high level, and further, as described above, the signal B is at a low level and then...
After determining irregularity, stop rewinding and cut off the power supply to the motor control circuit? - This means that normal shooting has been advanced by one frame.

A second example of the operation of the motor control logic 400 will be described with reference to the flowchart of FIG. 8 and the timing diagrams of FIGS. 7 and 9. By the way, Figure 7 shows the 1-piece switch S.
. When is ON, preliminary winding is completed, and 1 or 1+α)
FIG. 9 shows the signal timing when a frame is rewinded, and FIG. 9 shows the signal timing when the preliminary winding is completed when the one-frame switch S0 is OFF and the rewinding of α to one frame is performed.

First, the signal ^ is set to 1, i.e., -repel, to hold the power supply of the motor control ROSIC 400, and then it is determined whether the signal ^ is low rail, that is, whether the drive motor 2 is connected in the preliminary winding mode. When it is determined that the signal ^ is low level, it next determines whether the signal ^ is high level or not, and if the signal ^ is not high level, the preliminary winding is completed and it waits until it becomes irregular. do.

When the preliminary winding is completed and the signal ^ goes to ``Ele'' level, the signal C is ``Ire'' or ``Guru'', and then it is determined whether the signal B is ``Erayl'', that is, whether the 1-frame switch is QFF or not.
If signal B is not irregular, it waits until it becomes high level. When the signal B becomes high level, it is next determined whether the signal B is low level or not, and if the signal B is not low level, it waits until it becomes low level. When the signal B becomes low level, it is determined whether the signal B is high level or not, and if the signal 8 is not high level, it waits until it becomes .

When signal B becomes ... irregular, signal C is set to low level, excitation of relay RL is stopped, and relay switch RLC is
is connected to the normally closed contact NG to stop the rotation of the drive motor 2, and the signal 0 is set to a low level to cut off the power supply to the motor control logic 400. This is α or 1+
α) This means that the rewinding of the pieces has been completed.

On the other hand, when it is determined whether the signal ^ is low level or not and it is not low level, that is, when the drive motor 2 is connected to the shooting mode, the signal C is set to low level and the transistor 406 is turned on, and the relay RL is turned on. Excite the relay switch RLC and connect the normally open contact NO to drive motor 2.
is rotated in the rewinding direction to perform rewinding by normal shooting. Next, the program jumps to the first step in the case of high level in the first determination of whether or not the signal B is high level, and stops rewinding after determining the low level of signal B and then the irregularity as described above. And cut off the power supply to the motor control circuit. This means that one frame of normal shooting has been advanced.

〔Effect of the invention〕

As explained above, the present invention ignores at least the first transport end signal in the rewinding operation of the shooting mode, so that when the film is rewinded, there is an empty space for one frame, for example, on the side. A copy section can be provided, and all photographed frames can be properly developed by an automatic developing device.

[Brief explanation of the drawing]

1 is a diagram corresponding to the claims, FIG. 2 is a perspective view of a film drive system according to an embodiment of the present invention, FIG. 3 is a perspective view of a frame advance counter system, and FIG. 4 is a control circuit diagram. 5 is a flowchart of the first example of the motor control logic, FIG. 6 is a diagram showing the timing when rewinding by (1+α) or 2 frames in the flowchart shown in FIG. 5, and FIG. 7 is a diagram showing the timing shown in FIG. Fig. 8 is a flowchart of the second example of Chi-Yu control lossic, Fig. 9 is a diagram showing the timing when rewinding 1 or 1+α) pieces in the flowchart shown in Fig. 8. FIG. 6 is a diagram showing the timing when rewinding 1+α) frames. 2... Drive motor, 12... Torque detection lever, 3
2.../4) o-1t: 34... film, 100
...Tin rocket 1i11.210...Counter plate, 352...Swinging member, 40o...Motor support 10
Chic, SR...Mode changeover switch, So...
1 frame switch, SF...Film inspection %RL...Relay, RLC...Relay switch, Sc...Film cover switch

Claims (1)

[Claims] In a pre-winding camera, in which the film is continuously wound onto a spool after loading the film and prior to shooting, the film is wound onto the spool using a pre-winding mode, and then the film is rewound one frame at a time to the main trone according to the shooting mode. a preliminary winding mode end jetting means for detecting the end of the film frame feeding and outputting a preliminary winding motor end signal; a frame feeding end detection means for detecting the end of frame feeding of the film and outputting a frame feeding force end signal; r#! outputting a rewinding signal in response to input of a completion signal, and ignoring input of at least one first frame advance completion signal after inputting the preliminary winding motor completion signal;
A rewinding control means for stopping the output of the rewinding signal upon input of the next frame feed end signal is provided, and a pre-winding type camera is provided in which the rewinding signal is used to control the film drive system. Measure return circuit.