JP2001188286A - Feeding device and camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize feeding speed within a proper range and to prevent feeding noise from becoming large even when disturbance is caused with respect to the using environment of a device or a camera to which this feeding device is applied or the feeding speed of a recording medium. SOLUTION: A feeding means feeding the recording medium and driving control means (#17-#20) estimating the action of the feeding means at a feeding time based on a prescribed factor and setting the driving condition of the feeding means according to the estimated result are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a feeding device having a feeding means for feeding a recording medium and a camera.

[0002]

2. Description of the Related Art In a conventional silver halide camera, winding is performed for each frame after photographing is completed, and rewinding is performed after photographing all frames (or by a forced rewinding operation) or winding is performed when loading a film. After the end of shooting, rewinding was performed frame by frame (or by a forced rewind operation).

In addition, during the film feeding operation, the date and the like can be imprinted by the imprint function of the dot date and the like.
It records information on films using magnetism.

Here, as an example of feeding a silver halide camera, A
The case of a PS (new photo system) camera will be exemplified.

In a conventional APS camera, information (photographing conditions, date, etc.) can be recorded on a film by magnetism or the like, and information at the time of photographing is recorded in a recording section of a predetermined area corresponding to a photographed frame. It is well known.

[0006] In this type of APS camera, information recording on the film mainly performs a recording operation in synchronization with the film feeding. During the film feeding, the feeding speed is detected, and the detected speed is detected. From the recording frequency of information such as magnetism (1 bit
In general, the recording time is determined, and information is recorded on the film being fed at the frequency.

As means for detecting the above-mentioned feeding speed,
Film perforation (in the case of APS film, there are two perforations for one frame of the shooting screen)
Is generally detected using a sensor such as a photoreflector, and the movement time of the film, that is, the so-called feeding speed is detected from the perforation width and the detection time.

An example of the configuration of the APS camera and information recording will be described with reference to FIGS. 1 to 3 and FIG.

FIG. 1 is a perspective view showing the internal structure of a main part of an APS camera. In FIG. 1, reference numerals 1 and 2 read information on a data disk DD in a film cartridge C described later and change the detection timing according to the detection timing. The usage status of the film cartridge C is unused (UnExposed) /
During exposure (Partial) / Exposed (Exposed) / Developed (P
rocessed). Reference numerals 3 and 4 denote perforations Pf, P1 (n), P2 (n), P1 (n +
1) This is a photoreflector that detects a perforation signal which is a basis for detecting a shooting frame of the film F and determining a recording frequency for recording information in a recording area corresponding to each frame of the film. The perforation Pf is located at the leading end of the film, and thereafter P1 (n)
And a shooting frame n exists between P2 and P2 (n).
(Shooting frame n + 1 follows between (n + 1) and P2 (n + 1).)

Reference numeral 5 denotes a feed motor arranged in a spool 8 described later, 6 denotes a gear train for winding and rewinding the film F, 7 denotes a rewinding fork, and 8 denotes a film winding spool. C is a film cartridge, the type of film F (negative, reversal, etc.), sensitivity,
A data disk DD which includes type information such as a prescribed number of sheets and rotates in conjunction with the movement of the film F is incorporated. The stop position of the data disk DD when the film cartridge C is ejected from the camera is basically determined by the state of use of the film.

F is the above-mentioned film having a magnetic layer on the base side, and can record information by magnetism in a magnetic storage section of a predetermined recording area Tn corresponding to each frame. Further, the film F is provided with perforations Pf, P1, P2 and the like arranged corresponding to the reference position and the photographing screen. H is a magnetic head that records (writes) information on a recording area Tn on the film F or reproduces (reads) recorded information from the recording area Tn or the like.
P is a pad for pressing the film F against the magnetic head H.

FIG. 2 is a block diagram showing a circuit configuration of a main part of the camera. In FIG. 2, reference numeral 10 denotes a camera power supply battery (also used as a film feeding drive power supply), and reference numeral 11 denotes various operations of the camera. A control circuit such as a microcomputer having a recording frequency determining function for determining a recording frequency for information recording; a load detection switch 12 for recognizing that the film cartridge C has been loaded into the camera;
Reference numeral 13 denotes a film feeding circuit that drives the film feeding motor 5 to wind and rewind the film F. Reference numeral 14 denotes a perforation detection circuit that converts signals from the photoreflectors 1 to 4 into corresponding signals of the control circuit 11. In the present embodiment, the photoreflectors 3 and 4 and the perforation detection circuit 14 At this time, it is also assumed that the sheet also serves as a feeding speed detecting means for detecting the film feeding speed, which is the basis for determining the recording frequency for performing the magnetic information recording by detecting the perforations P1 and P2.

Reference numeral 15 denotes a date (Dat) which is a date recognition function for setting date information used for recording information and the like.
e) a circuit, 16 is a magnetic information recording circuit for driving the magnetic head H to record various information in the recording area Tn of the film F, and 17 is a circuit for reproducing information recorded in the recording area Tn of the film F. And a magnetic information reproducing circuit for driving the magnetic head H. Since recording is performed by the combination of the magnetic head H and the magnetic information recording circuit 16 and reproduction is performed by the combination of the magnetic head H and the magnetic information reproduction circuit 17, in the present embodiment, each of the combinations is used as a recording unit, a reproduction unit. It is called a means.

Reference numeral 18 denotes a temperature detecting circuit for measuring an environmental temperature; 19, a release switch for starting a photographing operation; 20, an AE / AF / SH circuit for performing well-known photometry, distance measurement, and shutter control; Is a storage unit that stores film information (the maximum number of frames that can be loaded with a loaded film, the number of frames to be captured, film sensitivity, etc.), shooting information (such as a shutter speed), and includes a data table for control according to shooting conditions. A memory for storing information, 22 is a liquid crystal display which is a notification means for displaying the number of frames of the film F recognized by the control circuit 11 and various kinds of photographing information, and 23 is a midway rewind of the film F. Is a manual rewind switch (hereinafter, referred to as an MR switch) for performing the operation, and 24 is a voltage detection circuit for detecting the voltage of the power supply battery 10.

The information recording operation is performed on the recording area Tn (corresponding to the photographed frame) by using the recording means when the film is fed after the photographing operation.

FIGS. 3 and 12 are schematic diagrams showing the operation timing of the feeding operation of the film F (winding up one frame including the information recording operation), and diagrams shown as electric signals. FIG. 3 shows (a) → in order from the start of the feeding operation.
(B) → (c) → (d) → (e), and FIG. 12 (a) shows a change in the feeding speed, (b) shows a detection signal of the photo reflector 4, c) shows a detection signal of the photoreflector 3, (d) shows an information recording signal (energization signal of the magnetic head H), and (d-1) shows an enlarged view of the information recording signal.

By starting the feeding motor 5 in the winding direction from the state shown in FIG. 3A, the gear train 6 shown in FIG.
, The spool 8 is rotated, and the winding of the film F is started. FIG. 12A shows a signal indicating the speed of the feed motor 5. Immediately after the start of energization, the rotation of the feed motor 5 is accelerated, so that the moving speed of the film 5 is not stable. Subsequently, the perforation P2 (n) is detected by the photo reflector 3 (see FIG. 3B). The movement time T1 of this perforation P2 (n) (FIG. 12)
(C) is detected as information for determining the information recording frequency. In this conventional example, the perforation P
Before the detection of 2 (n) is started, the speed of the feed motor 5 is assumed to be stable.

When the perforations P2 (n) pass through the photo sensor 3, the magnetic head H is energized to start an information recording operation. Recording frequency CL of this information recording
K (bit / sec) is the perforation P2 (n)
Is determined by the moving time T1, the width L (mm) of the preset perforation P2 (n), and the set information recording density x (bit / mm) (FIG. 12 (d-
1)). The recording frequency CLK (bit / se) of the information recording
While recording information based on c), the photo reflector 3 observes the perforation P1 (n + 1) (FIG. 3 (c)
Then, after the perforation P2 (n) is detected by the photoreflector 4 (see FIG. 3D), the feeding of the feed motor 5 is stopped, and the movement of the film F is decelerated. The shooting frame is controlled to stop at a position corresponding to a camera aperture (not shown) (see FIG. 3E). Note that the recording area Tn in this conventional example is
Means that the photoreflector 4 has a perforation P2 (n)
Is defined so as to correspond to the position of the magnetic head H at the time of passing through. That is, the photoreflector 4 sets the desired recording information amount to the perforation P.
It must be recorded before passing 2 (n).

[0019]

In the conventional camera having the above-mentioned structure, the film feeding during feeding is not stabilized, so that the film changes due to environmental changes such as temperature and humidity and load changes such as frame positions. Large variation in feeding speed. Therefore, an increase in the feeding sound due to a change in the film feeding speed or the like, and instability of information recording have occurred. The stabilization of the film feeding speed is necessary for the silencing of the film feeding sound and the stabilization of information recording such as optical imprinting and magnetic recording.

Japanese Patent Laid-Open Publication No. Hei 7-28141 discloses a proposal for reducing the noise. According to this proposal, the lower end of the spool is rotatably supported on the outer cylinder of the speed reducer, and the spool is rotatably supported. The upper end is pivotally supported by the upper base plate, and the speed reducer is supported and fixed to the camera body side via the vibration-proof rubber on the base plate, and the upper base plate is also fixed to the camera body via the vibration-proof rubber. , And achieves the above-mentioned silencing.

However, the above configuration is costly, and in the current camera, the feeding sound tends to be louder due to the higher feeding speed, and a fundamental solution is required.

A proposal for stabilizing information writing by the magnetic recording or the like is disclosed in Japanese Patent Application Laid-Open No. Hei 4-30444.
According to this publication, a film feeding speed is predicted based on information such as a power supply voltage, a temperature, a feeding speed at the time of film idle feeding, a specified number of frames of a film, a film type, and a number of photographed frames. By providing the means and controlling the operation timing of the magnetic recording means, stable magnetic recording can be performed at an appropriate timing without providing an encoder.

In the future, there is a tendency to increase the feeding speed and increase the amount of recorded information, and to increase the recording frequency. Therefore, using the conventional recording control method as proposed above, the magnetic recording density is increased. As the film feeding speed increases, the recording frequency further increases, so that the response of the recording means cannot catch up, and the recording density recorded on the film decreases. This problem causes a decrease in the visibility of recording in the case of dot date, and in the case of magnetic recording,
This causes a reproduction error of the magnetically recorded information.

Japanese Patent Application Laid-Open No. Hei 5-34799 discloses that
A camera that sequentially detects a film moving distance using an encoder and sequentially calculates a film feeding speed based on the film moving distance to control writing of information has been disclosed. Since the recording frequency is further increased due to the increase in density and the speed of film feeding, the response of the recording means cannot keep up and the problem that the recording density recorded on the film decreases.

(Purpose of the Invention) A first object of the present invention is to provide an apparatus to which the feeding apparatus is applied, a change in a use environment of a camera, and a disturbance to a feeding speed accompanying feeding of a recording medium. An object of the present invention is to provide a feeding device and a camera capable of stabilizing the feeding speed in an appropriate range and preventing the feeding sound from increasing.

A second object of the present invention is to eliminate the need to perform feeding at a feeding speed that is significantly lower than the feeding capability even if driving conditions for lowering the feeding speed are set to reduce noise. ,
An object of the present invention is to provide a feeding device and a camera capable of performing a stable feeding operation.

A third object of the present invention is to provide a recording frequency range capable of responding to the recording means even when there is a change in the use environment of information recording by the recording means or disturbance to the feeding speed accompanying the feeding of the recording medium. It is an object of the present invention to provide a feeding device and a camera capable of setting both the driving condition of the feeding means so as to be able to achieve the high density recording and the high speed feeding.

[0028]

According to a first aspect of the present invention, there is provided a feeding apparatus having a feeding means for feeding a recording medium. Predict the behavior during feeding by a predetermined factor,
And a drive control means for setting a drive condition of the feed means in accordance with the prediction.

Similarly, in order to achieve the first object,
According to a fourth aspect of the present invention, in a feeding apparatus having a feeding unit that feeds a recording medium, a driving load of the feeding unit is predicted based on a predetermined factor, and the driving load is calculated according to the predicted driving load. And a drive control means for setting a drive condition of the feed means.

In order to achieve the second object,
According to a tenth aspect of the present invention, when the drive control means determines that the feeding speed of the feeding means is not in a certain range based on the predicted driving load, the drive control means drives the drive control means to the maximum feeding speed in the certain range. A feeding device according to any one of claims 4 to 9 for setting conditions.

In order to achieve the first object,
According to an eleventh aspect of the present invention, in the feeding device having a feeding unit that feeds a recording medium, a driving output of the feeding unit is predicted by a predetermined factor, and the driving output of the feeding unit is determined in accordance with the predicted driving output. And a drive control means for setting a drive condition of the feed means.

In order to achieve the second object,
According to a sixteenth aspect of the present invention, when the drive control means determines from the predicted drive output that the feeding speed of the feeding means is not in a certain range, the drive control means sets the maximum feeding speed in a certain range. A feeding device according to any one of claims 11 to 15, wherein a driving condition is set.

In order to achieve the third object,
According to a seventeenth aspect of the present invention, in a feeding device having a feeding unit that feeds a recording medium, a state of information recording by a recording unit that records information on the recording medium is predicted by a predetermined factor. And a drive control unit for setting a drive condition of the feed unit in accordance with the predicted information recording state.

Further, in order to achieve the first to third objects, the invention according to claim 24 is directed to a camera provided with the feeding device according to claim 1, 4, 11, or 17. is there.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIGS. 1 to 9 are diagrams according to the first embodiment of the present invention. Since FIGS. 1 to 3 have already been described, their description will be omitted.

FIG. 4 is an example of a flowchart showing a photographing operation controlled by the control circuit 11 shown in FIG. 1 in the camera according to the first embodiment of the present invention, in which the release switch 19 is turned on. It is a sequence flowchart of FIG. Hereinafter, description will be made in accordance with this.

First, in step # 1, information on the loaded film cartridge C (maximum number of photographed frames Nmax, film type, etc.), current number of photographed frames N, and the like stored in the information storage memory 21 are stored. Recognize. Then, in the next step # 2, the voltage detection circuit 24 is operated to detect the voltage of the power supply voltage 10, and the detection result is taken in as voltage information. In the following step # 3, the temperature detection circuit 18
Is operated to detect the environmental temperature during use, and this detection result is taken in as temperature information. In the next step # 4,
A of the AE / AF / SH circuit 20 which performs a known photometry
The E circuit is activated to take in the brightness information of the subject, and in the following step # 5, the AF circuit of the AE / AF / SH circuit 20 for performing a well-known distance measurement is activated to acquire the distance information to the subject. take in.

In the next step # 6, the voltage detection circuit 24, the temperature detection circuit 18, and the AE / AF / SH circuit 2
Based on the voltage information, temperature information, photometry information, and distance measurement information taken in by 0, a well-known shutter opening / closing operation, that is, an exposure operation, is performed so that the exposure amount on the film F becomes appropriate. Then, the process proceeds to step # 7, where information (shutter speed and the like) in the exposure operation and information set in the date circuit 15 and the like are set as recording information. Then, in the next step # 8, the film feeding circuit 13 performs a winding operation for one frame of the film F, and in synchronization with the winding operation, the recording means (the information set in the above step # 7) 2) The recording operation is performed on the recording area Tn on the film F. When the winding of one frame of the film is completed, the set number of photographed frames of the film (= N + 1) is stored in a predetermined area of the memory 21 for storing information, and the next operation standby state is entered.

FIGS. 5A and 5B are diagrams showing an example of a rising characteristic at the time of film feeding. FIG. 5A shows a characteristic difference due to the number of frames of the film, FIG. 5B shows a characteristic difference due to the temperature, and FIG. Characteristic differences depending on the transmission drive voltage are shown.

FIGS. 7 and 8 show steps # 8 and FIG.
5 is a flowchart for explaining details of a feed drive setting and an information recording operation at the time of winding up one frame of film, which is executed in FIG. Each operation will be described with reference to FIG. 9 showing related electric signals generated in the sequence of this flowchart.

In the present embodiment, it is assumed that the film movement speed has already been stabilized at the observation stage of T1 shown in FIG. 5, and the movement time of the perforation P2 (n) is measured, and the T1 measurement speed (= T1) Is determined as the film moving speed. Since the film moving speed is stable even at the T2 observation stage, T2 (time of perforation P1 (n + 1) with the same photoreflector) ≒ T1.

FIG. 6 shows the T1 measurement speed due to the change in the number of frames and the T1 measurement speed due to the change in temperature shown in FIG.
The T1 measurement speed under the influence of the drive voltage change is defined as "kn" (FIG. 6 (a)), "kt" (FIG. 6 (b)) as a coefficient which varies depending on conditions with respect to a predetermined reference.
FIG. 7 is a diagram showing “kv” (FIG. 6C).

In the present embodiment, the reference is a photographed frame N = 2
0, speed T at power supply voltage VBAT = 2.8V, temperature Temp = 20 ° C.
As “b (base)”, “T1 (x) / T1 (20)” for each photographed frame (x) under the condition is stored in the information storage memory 21 as a data table of “kn”. Further, the speed change ratio due to the temperature change based on the "kn" is referred to as "kt", and the speed change due to the voltage change is referred to as "kv".

First, in step # 17 of FIG. 7, the feed control means included in the control circuit 11 controls the step # 1 of FIG. 4 based on the film speed characteristics based on the conditions such as the voltage information and temperature in FIG. The feeding means (the feeding motor 5, the film feeding circuit 13, the control circuit 11, and the like) are determined based on changes in conditions such as the maximum number of frames, the current number of frames, the film type, the power supply voltage, and the temperature information, etc. The load).
Here, the load of the feeding means is obtained as a speed change rate Kl (load) with respect to the reference speed Tb. An example of the calculation formula of Kl in the first embodiment is shown below.

Kl = Kn × Kt In the next step # 18, the required load of the silent feeding upper limit speed T1s with respect to the reference speed Tb is obtained as the speed change rate Ks by the equation Ks = T1s / Tb. Then, the speed change rate Kl based on the load prediction is compared with the speed change rate Ks at the silent feed upper limit speed T1s, which is a condition for performing the feed silence. As a result, when the speed change rate Kl due to the predicted load is larger than the speed change rate Ks obtained as the load at the silent feed upper limit speed, the process proceeds to step # 19, where the load is light and the feed speed is the silent feed upper limit speed. Therefore, the feeding condition (driving condition) for obtaining the silent feeding upper limit speed T1s is determined so as to satisfy the silent condition, and the feeding control for setting the film feeding speed to T1s is performed.

Specifically, based on FIG. 6C, the supply voltage Vs to the feed motor 5 is obtained from the speed change ratio Ks at the silent feed upper limit speed T1s, and set as a feed condition.
This enables high-speed feeding within a certain range while reducing noise by feeding at the silent feeding upper limit speed T1s.

If it is determined in step # 18 that the speed change rate Kl due to the predicted load is smaller than the speed change rate Ks obtained as the load at the silent feed upper limit speed, the process proceeds to step # 20. Since the feeding speed does not exceed the silent feeding upper limit speed, a feeding condition for obtaining an output that satisfies Kl is obtained and set as the feeding control.

Specifically, based on FIG. 6C, the supply voltage V1 to the feed motor 5 is determined from the predicted load change rate Kl and set as the feed condition.

The film speed T1 based on the predicted load at this time
Becomes T1 = Tb × Kl. This makes it possible to feed using the maximum of the feeding capacity.

In the next step # 21, energization of the feed motor 5 in the film winding direction is started by the film feed circuit 13 based on the determined supply voltage of the feed motor 5 determined above. Then, in the next step # 22,
The photoreflector 3 is set to a signal observation state by the pulse detection circuit 14. In the following step # 23, it is determined whether or not the perforation P2 (n) has come to the position of the photoreflector 3 based on the rise of the signal of the photoreflector 3. When the signal of the photoreflector 3 rises (point in FIG. 9). 1) Go to step # 24. Then, in step # 24, a timer (not shown) is reset and started to start measuring the movement time of the perforation P2 (n). In the next step # 25, the perforation P2 (n) is measured.
It is determined whether 2 (n) has passed the position of the photoreflector 3 based on the fall of the signal of the photoreflector 3. If the signal of the photoreflector 3 falls (point 2 in FIG. 9), the process proceeds to step # 26. Transition. Next step # 26
Then, the timer started in step # 24 is stopped, and the measurement result of the timer is recognized as P2 (n) movement time as T1 (points 1 and 2 in FIG. 9).

In the next step # 27, the above step #
Based on T1 measured at 26, the information recording frequency CLK is derived by calculation and set. This information recording frequency CL
As a factor for deriving K, in addition to the moving time T1 of P2 (n), the width L of the perforation P2 (n)
(For example, 2 mm), a desired recording density x (for example, 25 bit /
mm). In the first embodiment, it is assumed that CLK = (L × x) / T1 is used as an example of an expression for calculating the information recording frequency CLK.

In step # 28, step # 7 in FIG.
The recording means starts the recording operation of the recording information set in. This recording operation is calculated in step # 27,
According to the set information recording frequency CLK, the recording information is 1bi.
The recording is performed for each t (see FIG. 9D-1). The recording operation is performed when a desired recording information amount (for example, 450 bi
t) is determined and a recordable area (recording area) T
If all the information is recorded during n, and if all the information recording is completed before the end of Tn, the power supply to the magnetic head H is fixed in one direction and the recording operation is continued until the end of Tn.
Then, the process proceeds to step # 29 in FIG.

In step # 29 of FIG. 8, whether or not the perforation P1 (n + 1) has reached the position of the photoreflector 3 is determined by the rise of the signal of the photoreflector 3.
When the signal from the photoreflector 3 rises (point 3 in FIG. 9), the process proceeds to step # 30. Next step # 30
Then, it is determined whether or not the perforation P1 (n + 1) has passed the position of the photoreflector 3 based on the fall of the signal of the photoreflector 3. If the signal of the photoreflector 3 falls (point 4 in FIG. 9). ) Go to step # 31. In the following step # 31, the photoreflector 4 is set to the signal observation state by the perforation detection circuit 14.

In step # 32, it is determined whether or not the perforation P2 (n) has reached the position of the photoreflector 4.
Judgment is made based on the rise of the signal from the photoreflector 4. When the signal from the photoreflector 4 rises (point 5 in FIG. 9), the process proceeds to step # 33, where the perforation P
It is determined whether or not 2 (n) has passed the position of the photoreflector 4 based on the fall of the signal of the photoreflector 4, and when the signal of the photoreflector 4 falls (point 6 in FIG. 9), go to step # 34. Transition. Then, in the next step # 34, the recording operation of the recording information started in step # 28 is stopped.

In step # 35, the above-described step # 34
It is determined whether or not the recording of a desired recording information amount has been completed before the recording operation is stopped at. If the recording of the desired recording information amount has not been completed, the process proceeds to step # 36,
If the recording is completed, the process immediately proceeds to step # 37. When the process proceeds to step # 36, the NG flag indicating "recording could not be completed" is set in a predetermined area of the information recording memory 21, and the process proceeds to step # 37.
In step # 37, the film feeding circuit 13 starts to supply the brake to the feeding motor 5 (for example, to supply the motor in the reverse direction). Then, in step # 38, the power supply to the feeding motor 5 is stopped by the film feeding circuit 13, and in the next step # 39, the number of photographed frames N stored in the information storage memory 21 is counted. Up (N + 1) and store again. Finally, in step # 40, the liquid crystal display 22
A warning is displayed when the number N of photographed frames set in step # 39 or "recording could not be completed" in step # 36, and the sequence ends. Note that the processing of “recording cannot be completed” is not directly related to the present invention, and thus the details thereof are omitted.

In the first embodiment, the number of frames, temperature information, and the like are used as factors for deriving the speed change rate Kl as the feed load prediction. The present invention is not limited to these combinations. For example, there is no problem if only frame number information is used, or information related to load conditions other than the above is used. Furthermore, there is no problem even if it is used in combination with a prediction other than the prediction of the feeding load, and the feeding speed stabilization is used for a purpose other than noise reduction.

In the first embodiment, a camera capable of magnetic recording is described as an example. However, the information recording method can be applied to other types of cameras such as optical imprinting. . Although a camera capable of recording information is shown as an example, the speed stabilizing feeding method is also applied to a camera that does not record information.

(Second Embodiment) FIG. 10 is a flowchart showing the operation of the main part according to a second embodiment of the present invention, which is shown in FIG. 7 in the first embodiment.
It corresponds to.

Note that the circuit configuration of the camera according to the second embodiment of the present invention and the operation other than those corresponding to FIG. 7 are the same as those of the camera according to the first embodiment. Detailed description is omitted here.

In step # 41, the feed control means included in the control circuit 11 shown in FIG. 2 controls the step # 1 in FIG. 4 based on the film speed characteristics based on the voltage information, temperature and other conditions in FIG. Power supply voltage recognized and detected in # 3,
The output of the feeding means is predicted from changes in conditions such as temperature information and the use time of the feeding means. Here, the output of the feeding means is obtained as a speed change rate Ko (out) with respect to the reference speed Tb. An example of the equation for calculating Ko in the second embodiment is shown below.

Ko = Kt × Kv In the next step # 42, the required output of the silent upper limit speed T1s with respect to the reference speed Tb is determined as Ks = T1s / Tb as the speed change rate Ks. And the speed change rate Ko by the output prediction
And the speed change rate Ks at the time of the silent upper limit speed T1s, which is the condition for performing the feed silencing. As a result, if the speed change rate Ko based on the output prediction is larger than the speed change rate Ks obtained as the required output at the silent feed upper limit speed, step #
43, the output is large, and the feeding speed exceeds the silent feeding upper limit speed. Therefore, a feeding condition for obtaining the silent feeding upper limit speed T1s so as to satisfy the silent condition is obtained, and the film feeding speed is set to T1s. Is performed.

Specifically, based on FIG. 6C, the supply voltage Vs to the feed motor 5 is obtained from the speed change ratio Ks at the silent feed upper limit speed T1s, and set as a feed condition.
This enables high-speed feeding within a certain range while reducing noise by feeding at the silent feeding upper limit speed T1s.

In step # 42, if the speed change rate Ko by the output prediction is smaller than the speed change rate Ks obtained as the required output at the silent feed upper limit speed, the process proceeds to step # 44, and the output is reduced. Since the feed speed does not exceed the silent feed upper limit speed, the feed voltage set value of the feed motor 5 is set as the feed setting by the maximum feed voltage Vx of the feed motor 5.
Set to. This makes it possible to feed using the maximum of the feeding capacity.

The operations after step # 21 are the same as those in the first embodiment.

In the second embodiment, the power supply voltage and the temperature information are used as factors for deriving the speed change rate Ko as the feed output prediction.
The present invention is not limited to these combinations. For example, there is no problem even if only power supply voltage information is used or information related to output conditions other than the above is used. Furthermore, there is no problem even if it is used in combination with a prediction other than the prediction of the feed output, and if the feed speed stabilization is used for a purpose other than noise reduction.

In the second embodiment, a camera capable of magnetic recording is described as an example. However, the information recording method can be applied to other types of cameras such as optical imprinting. . Although a camera capable of recording information is shown as an example, the speed stabilizing feeding method is also applied to a camera that does not record information.

(Third Embodiment) FIG. 11 is a flowchart showing the operation of the main part according to a third embodiment of the present invention, which is shown in FIG. 7 in the first embodiment.
It corresponds to.

The circuit configuration of the camera according to the third embodiment of the present invention and the operation other than the portion corresponding to FIG. 7 are the same as those of the camera according to the first embodiment. The detailed description is omitted here.

In step # 51, the recording density x required to write a predetermined amount of magnetic recording information in a predetermined magnetic recording area by the feed control means included in the control circuit 11, and the characteristics of the magnetic head H The maximum response frequency CL that is the value
From Km, an upper limit value T1m of the film moving speed at which writing can be performed without lowering the magnetic flux density of the film as a state of information recording is determined. The maximum response frequency CLKm is used as a factor for deriving the film moving speed upper limit value T1m.
In addition, a perforation width L (for example, 2 mm) and a desired recording density x (for example, 25 bit / mm) are used. Film moving speed upper limit value T1m in the third embodiment of the present invention.
An example of the calculation formula is shown below.

T1m = (L × x) / (CLKm) In the next step # 52, the film moving speed upper limit value T1m.
Predict the feeding state for issuing Here, first, the speed change rate Km at the time of the film moving speed upper limit value T1m is obtained by Km = T1m / Tb. Next, based on FIG. 6C, the feeding condition at the time of the film moving speed upper limit T1m is obtained as the supply voltage Vm to the feeding motor 5. Then, the next step # 53
Then, the supply voltage Vm based on the recording condition prediction is compared with the maximum supply voltage Vx of the feed motor 5 derived from the voltage information detected in step # 2 in FIG. As a result, Vx becomes V
If it is larger than m, the process proceeds to step # 54, and since the film moving speed exceeds the film moving speed upper limit T2m, the supply voltage set value of the feed motor 5 is set to Vm. Thereby, since magnetic recording is performed using the maximum value of the magnetic recording speed of the magnetic head H, high-density recording can be performed at high speed.

In step # 53, Vx becomes V
If the value does not exceed m, the flow proceeds to step # 55, and since writing can be performed without lowering the magnetic flux density of the film, the supply voltage set value of the feed motor 5 is set to Vx as the feed setting. Thereby, high-speed feeding can be performed using the current maximum value of the feeding capacity.

The operations after step # 21 are the same as those in the first embodiment.

In the third embodiment, the maximum response frequency, the recording density, and the like are used as factors for deriving the film moving speed upper limit value T1m as the prediction of the information recording state. Are not limited to these combinations. For example, there is no problem even if only the recording density is used or information related to the information recording state other than the above is used.

Further, there is no problem if used in combination with prediction other than prediction of the information recording state. Further, a camera capable of magnetic recording is illustrated, but the information recording method is also applied to other types of cameras such as optical imprinting.

According to the above-described first and second embodiments, the prediction of the driving load of the feeding means and the prediction of the output of the feeding means are based on factors which change due to a change in the use environment of the camera or film feeding. (Temperature, number of film frames, etc.), and the driving conditions of the feeding means are determined based on this prediction so that the feeding speed is within a certain range. It is also possible to stabilize the feeding speed in an appropriate range, thereby preventing the feeding speed from becoming too high due to disturbance and increasing the feeding sound. Silence is achieved.

Conversely, the feed setting is set lower for noise reduction, and the feed speed is further reduced due to a disturbance factor, so that feeding at a feed speed that is significantly lower than the feed capability is eliminated. High-speed feeding.

According to the third embodiment, the state of information recording is predicted based on factors (temperature, recording frequency characteristics, etc.) that change due to changes in the use environment of the camera or film feeding. By determining the feed setting so that it falls within the range of the responsive frequency of the recording means based on the prediction, while performing both high-density recording and high-speed feeding,
It is possible to perform stable information recording. That is, it is possible to perform speed-stabilized feeding using the maximum feeding capability of the feeding unit, and perform high-speed recording using the maximum capabilities of the recording unit and the feeding unit.

In each of the above embodiments, an example in which the present invention is applied to a camera is described. However, the present invention is not limited to this, and a feeding device having a function of feeding a recording medium such as a film or a tape is provided. And electronic devices.

[0080]

As described above, claims 1, 4, 1
According to the invention described in 1 or 14, even if there is a change in the use environment of the device or camera to which the feeding device is applied or a disturbance to the feeding speed accompanying the feeding of the recording medium, the feeding is performed within an appropriate range. An object of the present invention is to provide a feeding device or a camera capable of stabilizing the feeding speed and preventing an increase in feeding sound.

The invention according to claim 10 or 16 is:
Even if the drive conditions for lowering the feeding speed are set for noise reduction, feeding at a feeding speed that is significantly lower than the feeding capability is eliminated, and a stable feeding operation can be performed. It is possible to provide a feeding device or a camera.

The invention according to claim 15 or 24 is capable of responding to the recording means even if there is a change in the use environment of the information recording by the recording means or disturbance to the feeding speed accompanying the feeding of the recording medium. An object of the present invention is to provide a feeding device or a camera capable of setting both the driving condition of the feeding means so as to fall within a range of a recording frequency and achieving both high-density recording and high-speed feeding.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an internal configuration of a main part of a camera according to each embodiment of the present invention and a conventional camera.

FIG. 2 is a block diagram showing a circuit configuration of a main part of the camera of FIG.

FIG. 3 is a view showing a schematic mechanism of a film feeding operation of the camera of FIG. 1;

FIG. 4 is a flowchart showing a shooting operation of the camera according to each embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of a film feeding start-up characteristic of the camera according to each embodiment of the present invention.

FIG. 6 is a diagram illustrating an example of a film feeding rise acceleration coefficient of the camera according to each embodiment of the present invention.

FIG. 7 is a flowchart showing a part of an operation at the time of film feeding including an information recording operation of the camera according to the first embodiment of the present invention.

FIG. 8 is a flowchart showing a continuation of the operation in FIG. 7;

FIG. 9 is a diagram showing an example of electric signals at the time of film feeding of the camera according to the first embodiment of the present invention.

FIG. 10 is a flowchart showing a part of an operation at the time of film feeding including an information recording operation of the camera according to the second embodiment of the present invention.

FIG. 11 is a flowchart showing a part of an operation at the time of film feeding including an information recording operation of a camera according to a third embodiment of the present invention.

FIG. 12 is a diagram showing an example of electric signals at the time of film feeding of a conventional camera.

[Explanation of symbols]

1, 2, 3, 4 Photoreflector 5 Feeding motor 11 Control circuit 13 Film feeding circuit 14 Perforation detection circuit 16 Magnetic information recording circuit 18 Temperature detection circuit 21 Information storage memory 24 Voltage detection circuit H Magnetic head C Film cartridge F Film P1 (n), P2 (n), P1 (n + 1), P2 (n + 1) Perforation Tn Recording area (corresponding to photographic frame)

Claims (24)

[Claims] 1. A feeding device having a feeding means for feeding a recording medium, wherein an operation at the time of feeding by the feeding means is predicted based on a predetermined factor, and the feeding is performed according to the prediction. And a drive control means for setting a drive condition of the means. 2. The feeding device according to claim 1, wherein the setting of the driving condition by the driving control unit is performed before feeding is performed by the feeding unit. 3. The apparatus according to claim 1, wherein the predetermined factor is a factor that changes with feeding or changes depending on a use environment of a device to which the feeding device is applied. Feeding device. 4. A feeding device having a feeding means for feeding a recording medium, wherein a driving load of said feeding means is predicted based on a predetermined factor, and said feeding is performed in accordance with said predicted driving load. And a drive control means for setting a drive condition of the means. 5. The apparatus according to claim 4, wherein the predetermined factor is a factor that changes with feeding, or a factor that changes depending on a use environment of a device to which the feeding device is applied. Feeding device. 6. The feeding device according to claim 5, wherein the recording medium is a film, and the factor includes the number of films. 7. The feeding device according to claim 5, wherein the factor includes at least one of a temperature, a humidity, and a type of a recording medium. 8. The feeding according to claim 4, wherein the setting of the driving condition by the driving control means is performed before the feeding is performed by the feeding means. apparatus. 9. The drive control unit according to claim 4, wherein the drive control unit sets the drive condition such that a feeding speed of the feeding unit falls within a predetermined range. Feeding device. 10. When the drive control unit determines from the predicted drive load that the feed speed of the feed unit is not in a certain range, the drive control unit sets the maximum feed speed within the certain range. The driving condition is set.
10. The feeding device according to any one of 9 above. 11. A feeding device having a feeding means for feeding a recording medium, wherein a driving output of the feeding means is predicted by a predetermined factor, and the driving output of the feeding means is predicted in accordance with the predicted driving output. A feeding control device for setting driving conditions. 12. The apparatus according to claim 11, wherein the predetermined factor is a factor that changes with feeding or changes depending on a use environment of a device to which the feeding device is applied. Feeding device. 13. The feeder according to claim 12, wherein the factor includes at least one of a power supply voltage of the feeder, a use time of the feeder, and a temperature. Feeder. 14. The feeding according to claim 11, wherein the setting of the driving condition by the driving control means is performed before the feeding is performed by the feeding means. apparatus. 15. The drive control unit according to claim 11, wherein the drive control unit sets the drive condition such that a feeding speed of the feeding unit falls within a predetermined range. Feeding device. 16. When the drive control means determines from the predicted drive output that the feeding speed of the feeding means is not within a certain range, the drive control means sets the maximum feeding speed within the certain range to the maximum. The driving condition is set.
16. The feeding device according to any one of claims 15 to 15. 17. A feeding apparatus having a feeding means for feeding a recording medium, wherein a state of information recording by the recording means for recording information on the recording medium is predicted by a predetermined factor, and the predicted information recording is performed. And a drive control means for setting a drive condition of the feed means according to the state of the feeding means. 18. The drive control unit obtains a feed speed upper limit value from the predicted information recording state, and calculates a supply voltage to the feed unit calculated from the feed speed upper limit value and a current battery voltage. 18. The feeding device according to claim 17, wherein a driving condition of the feeding unit is set by comparing the driving conditions. 19. The apparatus according to claim 1, wherein the predetermined factor includes an amount of information to be recorded on the recording medium.
19. The feeding device according to 7 or 18. 20. The feeding device according to claim 17, wherein the predetermined factor includes a frequency characteristic at the time of recording by the recording unit. 21. The feeding device according to claim 20, wherein the frequency characteristic is a maximum response frequency of the recording unit. 22. The feeding according to claim 17, wherein the setting of the driving condition by the driving control means is performed before the feeding is performed by the feeding means. apparatus. 23. The feeding device according to claim 17, wherein the drive control unit sets the driving condition such that a feeding speed of the feeding unit is equal to or less than a predetermined value. . 24. A camera comprising the feeding device according to claim 1, 4, 11, or 17.