JPS6028334B2 - Photography equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a photographing device for photographing a subject on a recording medium.

In photographic devices such as rotary cameras and flat-bed cameras that continuously photograph subjects on a long microfilm, unexposed spaces are formed between frames on the film (information content (a blank space is created between each group to superficially distinguish between each group of related frames), and in order to avoid exposure to the leading edge area of the film where fog is occurring, In this method, the film is fed through the exposure section without performing so-called blank feeding.

This jump feed is configured such that the film is automatically fed through the exposure position by manually operating the jump feed switch, and the film stops when the jump switch is released. With this type of camera, the operator does not know exactly how much film is being fed, leading to problems such as needlessly feeding the film or the amount being too small. This problem can be solved by measuring the amount of film feed and displaying the amount on a display, but this method requires a special measuring device and display, making the device complicated and expensive. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a photographing device capable of measuring and displaying the amount of film feed without adding any special parts.

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

Figure 1 shows a rotary camera. 1 is a supply reel, 2 is a take-up reel, and 3 is a microfilm F held in a roll on Tosonsha reel 1, and the film is transferred from the supply reel. 4 is a document feed roller, 5 is a document discharge roller,
6 is an illumination lamp, 7 is an imaging lens that is illuminated by the lamp 6 and projects an image of the original 8 onto a film, and 9 is a slit plate arranged at a photographing position. The document 8 is fed by rollers 4 to a photographing position illuminated by a lamp 6, and after passing through the photographing position at a constant speed, is discharged by rollers 5. A film feed roller 3 rotates in synchronization with the document feed, and an image of the document is photographed on a film using a slit exposure method. Manuscript 8
The film feed roller 3 is configured to stop when the film passes the photographing position. FIG. 2 shows the control circuit of the camera, where S is a switch that detects a document sent to the photographing position, and generates a count pulse signal every time one document is sent to the photographing position.

S2 is a switch that operates in response to the rotation of the film feed roller 3, and is turned on and off each time the film is fed by one car as the roller 3 rotates to generate a count pulse signal. S3 is a dry feed switch, which is an automatic return type switch, and is manually operated by the operator, turning on when pressed and turning off when released. The switch S2 is turned on and off by a cam provided coaxially with the film feed roller 3, for example. 10 is an AND gate 11 which gates the count pulse signal from switch S2;
12 is an inverter.

15 is a counter that adds and counts the count pulse signal generated from switch S or S2.

16 is a differentiation circuit that generates differential signals at the leading and trailing edges of the output signal of the inverter 12; 17 is operated by the differential signal;
・A pulse generation circuit that outputs a pulse signal of the same level as the number of digits of the counter, 18 is a memory circuit, 19 is an AND gate that transfers the contents of the counter 15 to the memory circuit 18, and the pulse signal of the pulse generation circuit 17 is When the control signal is sent to the AND gate 19, the contents of the counter 15 are stored in the memory circuit 1.
8 and is stored in the memory circuit.

20' is an AND gate that transfers the memory circuit of the memory circuit 18 to the counter 15, and when the pulse signal of the pulse generator 17 is sent to the AND gate 2 as a control signal, the contents of the memory circuit 18 are transferred to the counter 15. It will be done.

That is, when a pulse is output from the pulse generator path 17, this pulse opens the AND gates 19, 20 and the counter 1
The contents of 5 are transferred to the memory circuit 18, and the contents of the memory circuit 18 are transferred to the counter 15. The memory circuit 18 is cleared by the count pulse signal of the document detection switch S. A segment decoder 21 converts the contents of the counter 15 into segments, and a display 22 displays the contents of the counter 15 in seven segments.

23 is a motor drive circuit, and M is a film drive motor connected to the film feed roller 3.

In the camera described above, the counter 15 normally counts the number of times the image is taken, and the number of times the image is taken is displayed on the display 22 in five digits.

That is, each time the document 8 is sent to the photographing position and photographed, the switch S is activated, and the count pulse signal from the switch S passes through the OR gate 11 and is counted by the counter 15. The contents of the counter 15 are displayed as the number of photographing times on the display 22 via the segment decoder 21. Next, after photographing one group of documents, if a blank section is to be formed on the film, the blank feed switch S3 is turned on to feed the film without photographing.

The low level signal from the switch S3 drives the motor M via the motor drive circuit 23, and the film F is fed by the rotation of the film feed roll 3. The first operation of the idle feed switch S3 causes the output of the inverter 2 to become high level. The switch S2 is activated in conjunction with the blank feed, and the count pulse signal generated from the switch S2 passes through the AND gate 10 and the OR gate 11 and is counted by the counter 15. Therefore, the counter 15 that counts the photographing circuit is used instead of the photographing circuit. This means that the state has been switched to counting the amount of empty feed. On the other hand, the high level output signal of the inverter 12 activates the differentiating circuit 16, and the pulse generating circuit 1
The AND gates 19 and 20 are opened by the pulse No. 7. As a result, the contents of the counter 15 are transferred to the memory circuit 18, and the number of times of photographing so far is stored in the memory circuit. Before the photographing circuit is stored in the memory circuit 18, the memory circuit 18 is cleared by the count pulse signal of the document detection switch S, so the content of the counter becomes "0". During the blank feed of the film, the counter 15 counts the count pulses of the switch S2 and measures the amount of blank feed of the film. The contents of the counter 15 that counts the amount of empty feed are displayed on the display 2.
2 is displayed as the amount of film skipping (unit: ｽ).
After the film has been fed a predetermined amount, the feed switch S3 is turned on.
When the hand is released, the jump feed switch S3 is turned off, the motor M is stopped, and the film F is no longer fed.

On the other hand, when the switch S3 is turned off, the differentiating circuit 16 is activated.
The pulse of the pulse generation circuit 17 is applied to the AND gate 19.
,20 opens. As a result, the contents of the counter 15 are transferred to the memory circuit 18, where the amount of blank feed of the film is stored, and the number of shots stored in the memory circuit is transferred to the counter 15. Therefore, the counter 15 has been switched to the state of counting the number of shots again. After this, when a new group of manuscripts is sent to the photographing position and the photographing operation is restarted, the counter 15 additionally counts the number of times the document was photographed before the blank feed and the newly photographed message. Therefore, the number of times of photographing can be checked even if the camera is repeatedly fed, and the photographing operation can be carried out without error. Note that the memory circuit is cleared when the photographing operation is restarted. Next, if you turn on the jump feed switch S3 again without taking a single shot after commanding jump feed, the number of shots will be transferred to the memory circuit in the same way as above, and the counter 15 will record the number of shots before the jump. The feed amount is transferred.

With this second idle feed, the counter 15 adds and counts a new idle feed amount in addition to the previous idle feed amount. Therefore, the length of the space on the film formed by empty feeding can be adjusted accurately. As described above, according to the present invention,
Since the amount of blank feed of a recording medium such as a film can be measured and displayed without adding any special parts, the amount of blank feed can be accurately adjusted and the device becomes simple and inexpensive.

In addition, additional counting of the jump feed amount and switching of the number of shots can be easily performed by simply operating the jump feed switch.
It has the advantage that no skill is required for operation.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a rotary camera to which the present invention is applied;
FIG. 2 is a diagram showing a control circuit of the camera. 3...Film feed roller, 4...Document feed roller, 5...Document discharge roller, 15...Counter, S3...Jump feed switch. Figure 1 Figure N Sphere

Claims (1)

[Scope of Claims] 1. In a photographing device that counts signals generated each time an original is photographed on film using a counter, and displays the contents of this counter on a display section, a jump feed switch and a jump feed switch are operated. a film feeding means for switching the film to the blank feed when the film is fed; a signal generating means for generating a signal each time the film is fed a predetermined length by the film feeding unit; a memory means; means for transferring the contents of the counter to the storage means when the operation of the dry feed switch is completed; and means for transferring the contents stored in the storage means to the counter when the operation of the dry feed switch is completed; and a signal generated from the signal generating means during the dry feed. and means for inputting the value into the counter. 2. In a photographing device that uses a counter to count the signals generated each time an original is photographed on film, and displays the contents of this counter on a display, there is a jump feed switch, and when the jump switch is operated, the film jumps. a film feeding means for
a signal generating means for generating a signal each time the film is fed a predetermined length by the film feeding means; and a storage means;
When the jump feed switch is operated, the contents of the counter are transferred to the storage means, and the contents stored in the storage means are transferred to the counter, and when the operation of the jump feed switch is finished, the contents are stored in the storage means. means for transmitting the contents to the counter and the contents of the counting means to the storage means; means for inputting a signal generated from the signal generating means during idle feeding into the counter; and a means for erasing the stored contents of the storage means when photographing on film.