JPH03252646A - Data imprinting device for camera - Google Patents

Abstract

PURPOSE:To attain imprinting with an accurate dot interval in accordance with the moving speed of a film by obtaining the moving speed of the film by a photosensor such as a reflection type photointerrupter, etc., based on the movement of perforation holes. CONSTITUTION:The device is provided with a means for detecting the movement of the film by the photosensor such as the reflection type photointerrupter 1, etc., for optically detecting the movement of the film 5 based on the movement of the perforation holes 7 on the film 5. The moving speed of the film 5 is calculated by the photosensor and based on the data obtained by the photosensor, and then, the moving speed of the film 5 is accurately obtained by operating a control means for controlling the interval time of emitting light by a light emitter such as an LED 3, etc., based on the calculated result. The interval time of emitting the light by the emitter can be controlled in accordance with the obtained moving speed. Thus, the accurate moving speed of the film 5 can be obtained, and the imprinting with accurate dot interval can be performed in accordance with the result.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a data imprinting device for a camera.

[Prior art 1] In a data imprinting device for a camera that imprints characters composed of dots, movement of the film is detected by a roller that is in close contact with the film and a rotary encoder placed at the opposite end of the roller. However, the LED was controlled according to this detection result.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technology, the roller that is in close contact with the film transmits the moving speed of the film through friction with the film, so it is affected by slipping and other factors, making it difficult to accurately There are cases where the movement speed cannot be determined.

Therefore, in order to solve these problems, the present invention detects the amount of movement of the puff-74 rule hole in the film as an optical change of a photo-ink crack or other sensor instead of using friction. The object of the present invention is to obtain an accurate moving speed of the film and, based on the obtained result, perform imprinting with accurate dot spacing.

[Means for Solving the Problems] The camera data imprinting device of the present invention provides a) a data imprinting device that is perpendicular to the film feeding direction and on the film surface as viewed from the camera lens. By concentrating a light emitting body such as an LED with one or more dots arranged in parallel to each other and each dot capable of emitting light independently using a lens, and controlling the light emission of the light emitting body such as the LED, In a data imprinting device for a camera that imprints characters, symbols, etc. on the film when the film is moved such as when winding or rewinding the film, b) the movement of the film is controlled by perforations of the film; A film movement detection means using a photosensor such as a reflective photo ink heater for optically detecting the movement of holes; C) A light emitting interval of the light emitters such as the LEDs is adjusted according to the moving speed of the film. It is characterized by comprising a light emission control means for controlling.

[Function] Since the present invention has the above configuration, the reflective tool 41-
The film movement speed is controlled by a photosensor such as an inflator and a control means that calculates the film movement speed from the data obtained from the photosensor and controls the light emission interval time of a light emitting body such as an LED based on the calculation result. can be determined accurately, and the light emitting interval time of the light emitter can be controlled according to the determined moving speed.
Even if the film movement speed changes for each photographic image during film movement such as film winding or rewinding, data can be imprinted without being affected by this.

[Examples] Hereinafter, the present invention will be described in detail based on Examples.

FIG. 1 is a block diagram showing an embodiment of a data imprinting device for a camera according to the present invention. 1 is a reflective photo ink lamp, 3 is an LED equipped with 7 light emitters, and 2 is an LED 3
4 is an optical lens, 5 is a film, 6 is a reflecting plate, and 7 is a perforation hole in the film 5. The movement of the film 5 is detected by the reflective photo ink printer 1, and based on the detection data, the light emission control means performs appropriate light emission control of the LED 3, and the light emission of the LED 3 is focused by the optical lens 4, and the film 5 is moved. By focusing an image on the film 5, characters, symbols, etc. are imprinted on the film 5 while the film 5 is moving.

FIG. 2 is a hardware diagram showing an example of the circuit of the photo ink clubter 1, control means 2, and LED 3 in FIG. 1. 8 is an LED, 9 is a phototransistor, and the LED
8 and the phototransistor 9 constitute a reflective photo-in crack 1. 10 is ROM, RAM,
Microcomputer with input/output terminals, 11.12
are key switches for inputting data; key switches 11 and 12 are used to input and set data such as characters, numbers, and symbols to be imprinted. 13.14.15.16.1
Reference numerals 7, 18, and 19 are transistors that supply current necessary for light emission to the LEDs, and the microcomputer IO controls the light emission independently of each other. The light emission control means 2 is composed of the microcomputer 10, the key switches 11.12, and the transistors 13.14.15.16.17.18.19. 20.21.22.2
3.24.25.26 are LEDs and transistor 1
3 to 19 independently control light emission. L
The LED 3 is composed of EDs 20 to 26. When the film 5 is moved by winding or rewinding, a voltage waveform as shown in FIG. 3 is obtained at the emic terminal of the transistor 9 of the photo ink converter 1.

FIG. 3 is a diagram of the voltage waveform appearing at the emitter terminal of the 1-disk 9 of the photoink club 1 when the film 5 moves. 27 shows a waveform section when the photointerrupter 1 is located at the position of the perforation hole 7, and the light from the LED 8 of the photointerrupter 1 is reflected by the reflection plate 6 and turns on the phototransistor 9. is in a state of being. 28 shows a waveform section when the photo ink club is located at the film portion between the perforation holes 7 and the adjacent perforation hole 7, and the light from the LED 8 of the photo ink club 1 The phototransistor 9 is not turned on and is in an off state. Therefore, 29 indicates the section from the perforation hole 7 to the next perforation hole, and when the film 5 begins to move, the microcomputer 10 first measures the time of the section 29.

Since the distance that the film 5 moves in the section 29 is a fixed constant, the microcomputer 10 next uses this constant as the distance that the film 5 moves in the section 29.
Calculate the time required for the film to move the distance of the imprint dots by dividing the time required for 29 by the number divided by the distance of the imprint dots in the direction of movement. . microcomputer 10
Next, in order to imprint the data input and set in advance by the key switches 11 and 12 onto the film 5, the transistors 13 to 19 are turned on and off in the time required for the film to move through the calculated imprint dot interval. The film 5
The pre-input and set data is imprinted on the screen.

By carrying out the above-described operations while the film 5 is being moved, such as winding or rewinding, it is possible to imprint the film 5 with appropriate dot spacing.

Furthermore, the LED 3 as a light emitter and the number of dots on the light emitter are merely examples.

In addition, although FIG. 1 shows an example of detection using a reflective photoinkractor, in addition to this, a phototransistor may be placed at the position of the reflective photoinkractor 1 in FIG.
A method of arranging a light emitter capable of turning on the phototransistor at the position of the reflection plate 6 and detecting the movement of the film based on the output of the phototransistor, or a method of using a photodiode instead of the phototransistor. etc., and the method of detecting the moving speed of the perforation hole shown in FIG. 1 is only one example.

Regarding the voltage waveform diagram in Figure 3, the voltage value 1 hour,
The waveform is just an example.

Regarding the microcomputer 10, ROM, RAM
Conceivable methods include configuring a ROM externally, or configuring a ROM for fonts such as Chinese characters externally, and the configuration of the microcomputer shown in FIG. 2 is merely an example.

Regarding the transistors 13 to 19, there is also a method of using NPN type transistors and LEDs with a common anode, or a method of using LEDs using transistors 13 to 19.
It is also possible to include the power control part of the ED in the microcomputer 10, and the power control part of the LED,
The configuration of the LED is also just an example.

[Effects of the Invention] The camera data imprinting device of the present invention uses a photo sensor such as a reflective photo ink printer to determine the film moving speed from the movement of the perforation holes, thereby accurately printing the film. Since the moving speed can be determined, in the case of a camera data imprinting device that uses a light emitting device such as an LED to imprint characters made up of dots, it is possible to print with accurate dot spacing according to the film moving speed. It becomes possible to include

[Brief explanation of drawings]

FIG. 1 is a block diagram of a data imprinting device for a camera as an embodiment of the present invention. FIG. 2 is a hardware diagram showing the circuit example of FIG. 1. FIG. 3 is a diagram of the voltage waveform appearing at the output of the photo ink converter during film movement. that's all

Claims (1)

[Claims] (1)a) Perpendicular to the film feeding direction and on the back or front surface of the film as seen from the camera lens,
A light emitting body such as a light emitting diode (hereinafter abbreviated as LED), which is arranged parallel to the film surface and has one or more dots each of which can emit light independently, is focused by a lens, and the LED A data imprinting device for a camera that imprints characters, symbols, etc. on the film when the film is moved, such as when winding or rewinding the film, by controlling the light emission of a light emitting body such as, b) film movement detection means using a photosensor such as a reflective photointerrupter for optically detecting movement of the film from movement of perforation holes in the film; c) detecting the movement of the film according to the movement speed of the film; A data imprinting device for a camera, comprising a light emission control means for controlling the light emission interval of a light emitting body such as an LED.