JPH0720668Y2 - Camera with data imprinting device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a data imprinting device camera, and a driving method of an imprinting light source of the data imprinting device.

[Prior art]

A block diagram of a conventional camera with a data imprinting device and an example of its appearance are shown in FIGS. 1 and 2. Reference numeral 1 denotes a data imprinting device, which interlocks with an imprinting data former 2 for generating a desired imprinting data signal, an imprinting data indicator 3 for displaying data of the former, and a shutter release 12 of the camera body. A pulse generator 4 having a built-in imprinting light quantity switching unit for generating a one-shot pulse signal when the imprinting switch 6 is turned on, an imprinting light source 5 which emits light when driven by the pulse generation time of the pulse generator, and a pulse It is composed of a pulse width switching switch 7 for selecting the pulse width of the generator 4 from the outside of the apparatus, and a second battery 15 as a power source for these elements 2 to 7. The data imprinting device 1
As an example of the structure, when the imprinted data is the date when the image was taken, the imprinted data forming device 2 is used as a timing device and the imprinted data display device 3 is a liquid crystal display for displaying the data in a blank negative type. There is a structure in which a body is used, the imprinting light source 5 is a lamp, the light of the lamp is transmitted through a liquid crystal panel, and is guided to the photosensitive film 8 as light in the form of imprinting data to be imprinted. In addition, as the imprinting device, there is a configuration example using a light emitting diode (LED). In this case, the imprinted data display 3 and the imprinted light source 5 are integrated 7-segment LED, and the LED is generated in the data shape only during the pulse generation period of the pulse generator 4 to expose the photosensitive film. To do.

The pulse width switching switch 7 is a switch for setting the amount of imprinting light (the amount of light emitted from the imprinting light source) according to the sensitivity of the photosensitive film, and is adjusted to the same conditions as the sensitivity setting section 11 on the camera device side described later. . 16 is the camera body,
A shutter unit 9, a photographing lens 10, a film sensitivity setting unit 11, a strobe 13, a shutter release 12, and a power supply 14 for these elements.
Composed of. The camera body 16 has a film winding unit and the like (not shown).

FIG. 2 shows an example of the appearance of the camera, as seen from the back lid side. Reference numeral 17 is a monitor display of imprinted data, 18 is a correction button for imprinted data, and 19 is a knob for operating the pulse width switching switch 7. 20 is the selection of imprint contents (date or hour / minute) and imprint is prohibited ("OFF" in display 17)
Is displayed and the light source is not turned on even when switch 6 is turned on). The reason why the power source of the data imprinting device 1 is different from the power source of the camera body in the camera having the above configuration is that the battery 14 of the camera body is generally a single AA battery and has a single life. When using a timekeeping device as a formatter for automatic date conversion, it is necessary to set a time every time the battery of the camera device is replaced, which complicates use, and when the data device is attached to the back cover side, This is because the power is turned off every time the film is replaced (every time the back cover is opened), and the same problem occurs. Therefore, a dedicated power source as a data imprinting device is configured in the device. In addition, the power source of the imprinting data generator can operate at 1.5V to obtain the necessary imprinting light amount, but requires a 3V power source, and generally requires a button type silver battery or alkaline manganese battery (SR44) for miniaturization. , Or LR44 type) are used. This hinders downsizing of the device and cost reduction.

Further, according to this configuration, the film sensitivity setting is required on both the camera body side and the data imprinting device, which complicates the device and complicates the operation.

Furthermore, in recent years, in particular, automation has been required for 35 m / m lens shutter cameras, such as automatic exposure (AE) and automatic distance adjustment (A
F), automatic film winding, etc. have been realized, but only film sensitivity adjustment remains manual. However, this is also proposed by the film manufacturer, for example, Kodak Company.
The DX code method is nearing realization. In this case, it goes without saying that the data imprinting device also automatically or in association with the camera body side sets the film sensitivity, that is,
It is necessary to have a configuration in which the amount of projected light is automatically set according to the type of film.

Conventionally, as a method of eliminating the above-mentioned drawbacks, for example, as a first power source for the data imprinting device section, as a power source miniaturization, for example, Japanese Patent Application Laid-Open No. 53-19023 discloses a imprinting light source (in this example, the light source and the display section are integrated. A power supply for the camera body is proposed as a power source (for the example of using a 7-segment LED, it is described as a display section). According to this method, since the power source of the data imprinting device may be a small battery, the device can be downsized and the cost can be reduced. However, the film sensitivity setting for the second and third points is not yet automated and complicated.

As a method of automating the sensitivity setting, a method of electrically switching the pulse width switching switch 7 with a signal from the shutter section of the camera body is conceivable, but in the case of this configuration, between the camera apparatus and the data imprinting apparatus, that is, Since many contact mechanisms are required between the camera body and the back cover, the structure becomes complicated, the cost increases, and the reliability decreases.

As another solution, it is an application of the dual use method of the power source, but a pulse signal generator of a time width that drives the imprinting light source with the power source of the shutter section and is linked to the film sensitivity setting section of the shutter section is used. A method is conceivable in which the generator is provided in the camera body and the light source for projection is controlled by the generator. According to this method, the sensitivity setting can be automated, and the number of contacts can be two as in the conventional case. However, this method makes it difficult to select imprinting prohibition because imprinting is made every imaging operation. Conventionally, the imprinting or prohibition is done on the data imprinting device side regardless of the contents displayed on the monitor.Therefore, if the imprinting prohibition is selected, it is necessary to give the information to the pulse generator in the camera body. Therefore, a contact and an interface circuit for that purpose are required, which leads to complication of the device, increase in cost, and decrease in reliability.

〔Purpose〕

The present invention eliminates the above-mentioned drawbacks and enables the size and thickness of the data imprinting device to be reduced, and the automation of the data imprinting device side by linking the film sensitivity with the camera body side can be performed. It is an object of the present invention to provide a camera with a data imprinting device that enables a minimum number of contacts with the data imprinting device.

[Means for Solving the Problems]

The camera with a data imprinting device of the present invention comprises an imprinting data former, an imprinting light source for imprinting data on a film, an imprinting prohibition selection switch,
A first transistor connected in series to the imprinting light source, a first pulse generator that generates a first pulse that controls the opening and closing of the first transistor, and the imprinting data former and the first pulse generator are driven. A data imprinting device having a first power source, a film sensitivity input section, a shutter section that determines an exposure amount according to the film sensitivity, and a second pulse signal whose pulse width changes according to the film sensitivity. A second pulse generator, the imprinting light source, the shutter unit, and the second
A camera body including a second power source for driving a pulse generator, and a second transistor which is turned on while the second pulse signal is output and supplies a current from the second power source to the projection light source. The first pulse generator detects the current from the second power source supplied to the projection light source to generate the first pulse, and the projection prohibition selection switch prohibits the projection. Is selected, the first pulse is not generated, and the pulse width of the first pulse is set to be larger than the pulse width of the second pulse.

〔Example〕

An embodiment of the present invention is shown in FIGS. In this explanatory view, only the part related to the present invention is shown, and the same parts as the conventional example are omitted. In FIG. 3, the left side 31 from the dotted line is the camera body side, and the right side 32 is the data imprinting device. A film sensitivity setting unit 33 is controlled by the DX switch group 34. 35
Is the shatter part. 41 is a shutter release. 36 is a second pulse generator which is controlled by the film sensitivity setting unit 33 and outputs a pulse signal (A in FIG. 4) each time the shutter release 41 is turned on. The time width of the output signal is a film. It changes in relation to the sensitivity. For example TA is 60 m _sec when the sensitivity ISO25～50, when the ISO64~250 TA = 45m _sec, ISO400~10
When 00, TA = 30m _sec . The output signal turns on the electrical switching element (transistor in the example) Tr1. Data imprinting device 3 by turning on the transistor Tr1
The transistor Tr3 in 2 is turned on, and the first pulse generator 37 in the device outputs a pulse signal (B in FIG. 4) of a fixed time width. The electric switching element (transistor) Tr2 is turned on by the signal. As a result, the imprinting light source 38 includes the shutter unit 35 on the camera body side and the second pulse generator.
Current flows from the second power source 39 that supplies power to 36 etc.,
Light. During this lighting period (TL in FIG. 4), both the output TB of the first pulse signal and the output TA of the second pulse signal are being output, which is substantially TA. TB is constant and at least TA
Is longer than the maximum time. When the imprinting prohibition is selected on the data imprinting device side, no signal is output from the first pulse generator 37, and therefore imprinting is not performed even when the shutter release 41 is turned on. Reference numeral 40 denotes a first power source that serves as a power source for the data imprinting device, which may be a small battery.

〔effect〕

According to the configuration, (1) since a large load is not applied as a power source of the data imprinting device, a small and thin battery can be used. For example, a BR2016 type lithium battery can be used to make the device thinner, and because the load is small, a small battery allows continuous operation for 5 years or more, which is extremely effective for application to an auto date. is there. In addition, since it can operate at 1.5V, only one battery is required and cost can be reduced.

(2) Since the lighting time of the imprinting light source is controlled by the camera body, it is not necessary to set the film sensitivity on the data imprinting device side, and the number of contacts is the minimum of 2 (Fig. 3, 42, 4).
3) is sufficient, and unnecessary imprinting when imprinting is prohibited, which is a drawback of the conventional example, can be prevented. In this example, if the DX switch group 34 is made to correspond to the DX code of the film, the film sensitivity setting including the data imprinting device can be fully automated.

(3) Furthermore, since the conventional switch 7 and knob 19 for setting the film sensitivity shown in FIGS. 1 and 2 are unnecessary,
In addition, the cost can be reduced and the appearance is sharp and improved.

[Brief description of drawings]

FIG. 1 is a block diagram of a conventional camera with a data imprinting device. FIG. 2 is an external view of the camera of FIG. FIG. 3 is a diagram showing an embodiment of the configuration of the present invention. FIG. 4 is a timing diagram showing signals from the pulse generator shown in FIG. 1,32 …… Data imprinting device 16,31 …… Camera body 2 …… Imprinting data former 3 …… Imprinting data display 4 …… Pulse generator 5,38 …… Imprinting light source 11,33… … Film sensitivity setting section 9,35 …… Shutter section 14,39 …… Second power supply 15,40 …… First power supply 36 …… Second pulse generator 37 …… First pulse generator φ… ... Clock pulse signal which is the basis of signal formation of the first pulse generator

Claims (1)

[Scope of utility model registration request] 1. An imprinting data former, an imprinting light source for imprinting data on a film, an imprinting prohibition selection switch, a first transistor connected in series to the imprinting light source, and the first transistor. To control opening and closing
A data imprinting device comprising a first pulse generator for generating a pulse, the imprinting data former and a first power source for driving the first pulse generator, a film sensitivity input section, and a film sensitivity A shutter unit that determines an exposure amount according to the film, a second pulse generator that generates a second pulse signal whose pulse width changes according to the film sensitivity, the projection light source, the shutter unit, and the second unit.
A camera body including a second power source for driving a pulse generator, and a second transistor which is turned on while the second pulse signal is output and supplies a current from the second power source to the projection light source. The first pulse generator detects the current from the second power source supplied to the projection light source to generate the first pulse, and the projection prohibition selection switch prohibits the projection. When the selection is made, the first pulse is not generated and the pulse width of the first pulse is set to be larger than the pulse width of the second pulse. .