JPH0434134B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a data imprinting device for a camera.
The present invention relates to a data imprinting device for a camera that selectively imprints data vertically and horizontally according to the orientation of the camera.

[Background of the invention]

Recently, cameras equipped with data imprinting devices that record photographic data such as the shooting date and shutter speed on each frame of the film each time they are taken have become commercially available. It is extremely convenient because it can be recorded.

By the way, in a camera equipped with such a data imprinting device, depending on the vertical and horizontal orientation of the camera, that is, when shooting with the camera set horizontally (normal position), or when shooting with the camera set vertically. It is desirable that the data to be imprinted on the film be configured to be imprinted and recorded in the horizontal or vertical direction. Therefore, a camera having such a data imprinting device requires means for detecting the vertical and horizontal orientation of the camera, and a mercury switch is sometimes used as the vertical and horizontal position detecting means.

The structure of such a mercury switch 12 is shown in FIG. 6, in which mercury 52 is sealed in a tubular glass container 50, and the tip portions 54A of a pair of lead wires 54 are inserted. and lead wire 5
The tip portion 54A of No. 4 is malgamized so that mercury can easily adhere thereto. By tilting the glass container 50 and causing the mercury 52 to flow within the glass container 50, the tips 54A of the lead wires 54 are short-circuited or opened, thereby turning the mercury switch 12 on and off.

Since the mercury switch with this structure is configured as a gravity detection type, the mercury switch 12 is
As shown in the figure, with the data imprinting device used as a means for detecting the vertical and horizontal position of the camera, there is no problem when taking pictures with the photographing lens of the camera facing horizontally, but when taking pictures with the photographing lens facing downward. In some cases, if the mercury switch is disposed within the camera body within a plane perpendicular to the optical axis of the photographic lens system, the following problems occur. In other words, when taking close-up photographs, etc., when taking pictures with the camera in a horizontal position and the photographic lens system facing straight down, the mercury in the mercury switch may flow and become unstable, causing the data to be imprinted in a vertical or horizontal direction. There is a possibility that you will not be able to choose.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and is a camera that records film data by recording it vertically or horizontally and vertically depending on the vertical and horizontal orientation of the camera. It is an object of the present invention to propose a data imprinting device for a camera that can accurately record photographic data in a predetermined vertical or horizontal position of a film even when photographing.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention uses a mercury switch that detects the vertical and horizontal position of the camera in a data imprinting device for a camera that imprints and records photographic data such as the date of photographing on each frame of film every time the photograph is taken. disposed on the camera body so that the tip is inclined at a predetermined angle with respect to the bottom surface of the camera body, and also so that the tip is inclined backward at a predetermined angle with respect to a plane perpendicular to the optical axis of the photographic lens system. It is characterized by being placed in.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a data imprinting device for a camera according to the present invention will be described below with reference to the accompanying drawings. 1 and 2 show the arrangement of a mercury switch as means for detecting the vertical and horizontal position of a camera in a data imprinting apparatus according to the present invention.
FIG. 1 is a rear view of the camera body 10 with the photographic lens system oriented horizontally, and FIG. 2 is a schematic side view thereof. In these figures, the mercury switch 12 is configured to press the bottom surface 1 of the camera body 10 in a plane parallel to the film within a space 16 (between the film holding plate and the back cover) of the back cover 14 of the camera body 10.
8 at a predetermined angle, for example, 45 degrees. This is intended to ensure the stability of the operation of the mercury switch 12 as a photographing position detecting means when photographing with the camera. In other words, if the mercury switch 12 is installed at an angle of 45 degrees with respect to the bottom surface 18 of the camera body, the mercury switch 12 will be tilted at an angle of ±45 degrees when the camera is in the horizontal position. ON
In other words, data can be captured in the horizontal position, and the mercury switch 12 can be maintained even when the camera is in the horizontal position, even if the camera is tilted in the horizontal position.
can be kept in the OFF state, that is, the data can be imprinted in a vertical position.

Incidentally, the above-mentioned inclination angle does not necessarily have to be 45 degrees, but it is preferably set to an angle of about 45 degrees.

Further, in the present invention, as shown in FIG. 2, the mercury switch 12 is arranged so that its upper end is rearward at a predetermined angle θ (5° to 6°), which is a feature of the present invention.

In FIGS. 1 and 2, the mercury switch 12 is in the on state, and at this time, the data imprinting device built into the camera body 10 is in a standby state so as to record photographic data horizontally on the film surface to be exposed. be.

For example, even when the camera body 10 is in the horizontal position and the photographing lens system 20 is directed directly below the horizontal position as shown in FIG. 3, the mercury switch 12 is tilted by the angle θ as described above. Therefore, the mercury switch 12 is maintained in the on state, and when a photograph is taken at this position, photographic data is recorded in the lateral direction of the exposed surface of the film.

That is, from the state shown in FIG.
Even if the camera lens 20 is rotated counterclockwise to an angle of 90 degrees and the photographic lens 20 is directed directly downward as shown in FIG. 3, the tip of the mercury switch 12 is tilted upward by an angle θ relative to the horizontal direction. Even if the photographic lens is directed directly downward, the mercury switch 12 remains in the on state, and the horizontal position data is captured. Here, the angle θ is selected to be, for example, 5 to 10 degrees, which means that the mercury switch 12 is
Since it is disposed in a space 16 of the back cover of the camera, it is designed to save space in this space 16.

In this manner, in this embodiment, even if the photographing lens system 20 is directed directly downward, photographic data can be reliably recorded at a predetermined position on the photosensitive surface of the film according to the photographing position.

In the embodiment described above, when the camera is pointed directly upward, the mercury switch 12 is turned off and the data is captured vertically, but in general, it is rare to take a picture with the camera pointing directly upward, and when the camera is pointed directly downward, such as when taking a close-up photo. Since there are many cases where people take pictures, solving this problem is of great significance.

In FIGS. 1 to 3, 22 is an external display section that shows the recording position of photographic data, 24 is a setting section for selecting the imprint mode and adjusting the time of the built-in quartz clock, and 26 is a setting section for selecting the imprint mode and adjusting the time of the built-in quartz clock. 28 is a shutter button.

Next, FIG. 4 shows the circuit configuration of the main part of the data imprinting device according to the present invention. In the same figure, LC _H
is a lateral data display which is disposed opposite to the surface of the film loaded in the camera body 10 to be exposed, and in which the date is digitally displayed by the operation of a quartz clock built in in the lateral direction of the film surface. The _LCV is also a vertical data display that digitally displays the date vertically. The horizontal direction data display section LC _H and the vertical direction data display section LC _V constitute a liquid crystal display section, and the shooting data set by the setting section 24 is transferred to the horizontal direction data of the liquid crystal display section by a drive circuit (not shown). Display section LC _H ,
Displayed on the vertical data display section LC _V.

Further, L _H is a lamp for illuminating the horizontal data display section, and L _V is a lamp for illuminating the vertical data display section. One end of the lamp _LH is connected to one end of the mercury switch 12 via the transistor Q1, and the other end is connected to the battery 40 via the switch S _M , which is closed when the shutter button is pressed halfway.
connected to the anode of

Also, one end of the lamp L _V is connected to transistors Q2 and Q.
2 to the cathode of the battery 40, and the other end is connected to the anode of the battery 40 via switch _SM . The bases of transistors Q1 and Q2 are commonly connected and connected to terminal 100.

Furthermore, the emitter of transistor Q1 is connected to the base of transistor Q3 via resistor 32, and to the anode of battery 40 via resistor 34 and switch _SM .

In the above configuration, prior to imaging, the imaging data entered by the setting section 24 is displayed on the horizontal data display section _LCH and the vertical data display section _LCV .

When the camera body 10 is placed in the horizontal position, the mercury switch 12 is turned on, and the transistor Q3
Since no bias current is supplied to its base at this point, it becomes non-conductive and the emitter of transistor Q1 is grounded. When the shutter button 28 is operated in this state, the switch S _M is closed and the transistors Q1 and Q2 are connected to the terminal 100.
A pulse signal indicating the shutter operation timing is input to the base of the shutter. Here, since transistor Q3 is in a non-conductive state, only transistor Q1 becomes conductive. As a result, the lamp L _H has a battery of 40
When the power supply voltage is supplied from the lamp LH, the lamp _LH is lit for a time corresponding to the pulse width of the pulse signal, the horizontal data display section _LH is illuminated, and the photographic data is imprinted horizontally on the exposed surface of the film. recorded.

On the other hand, when the camera body 10 is rotated clockwise from the position shown in FIG. 1 to the vertical position as shown in FIG. 5, the mercury 52 flows in the direction of gravity and the mercury switch 12 is turned off. Transistor Q3
Since a bias current is supplied to its base through resistors 34 and 32, it becomes conductive, and transistor Q1 becomes non-conductive.

If the shutter button 28 is operated at this time,
A pulse signal indicating the shutter operation timing is input from the terminal 100 to the bases of transistors Q1 and Q2, but since no forward bias voltage is applied between the base and emitter of transistor Q1, transistor Q1 is still in a non-conducting state. Yes, only transistor Q2 becomes conductive. As a result, the lamp LV similarly lights up for a time corresponding to the pulse width of the pulse signal, and the vertical data display section
The LCV is illuminated, and photographic data is imprinted vertically on the exposed surface of the film and recorded.

Here, the pulse width of the pulse signal indicating the shutter operation timing is determined according to photographing conditions such as film sensitivity and shutter speed, and the time for imprinting photographic data is adjusted.

In this example, the camera is placed in the horizontal position (normal position).
The mercury switch 12 is configured so that it is turned on when the camera is in the vertical position, but it may be configured so that the mercury switch 12 is turned on when the camera is in the vertical position. This can be achieved by changing the circuit configuration.

Further, in the present invention, a lamp is used as the illumination means for illuminating the liquid crystal display section, but the present invention is not limited to this, and a light emitting diode may also be used.

[Effects of the Invention] As explained above, the present invention detects the vertical and horizontal positions of the camera in a data imprinting device for a camera that imprints and records photographic data such as the date of photographing onto a film frame every time a photograph is taken. Since the mercury switch is arranged within the camera body so that its tip is inclined backward by a predetermined angle with respect to a plane perpendicular to the optical axis of the photographic lens system, according to the present invention, the photographic lens system can be Even when shooting directly downward, the shooting data can be forcibly recorded in the horizontal or vertical position of the film.

[Brief explanation of drawings]

1 and 2 show the arrangement of a mercury switch as a vertical/horizontal position detection means in a data imprinting device according to the present invention; FIG. 1 is a rear view of the camera when the camera is in the horizontal position; The figure is a side view, FIG. 3 is a side view of the camera with the photographic lens system facing downward, and FIG. 4 is a circuit diagram showing the circuit configuration of the main parts of an embodiment of the data imprinting device according to the present invention. 5 is a rear view of the camera when it is installed in a vertical position, and FIG. 6 is an explanatory diagram showing the structure of the mercury switch. 10...Camera body, 12...Mercury switch,
LC _H ...Horizontal data display section, LC _V ...Vertical data display section, L _H , L _V ...Lamp, Q1 to Q3
...Transistor.

Claims (1)

[Claims] 1. In a data imprinting device for a camera that imprints data selectively in the vertical or horizontal direction according to the orientation of the camera, the data imprinting device is arranged opposite to the photosensitive surface of a film loaded in the camera body. , a liquid crystal display section comprising a horizontal data display section for displaying shooting data in the horizontal direction of the photosensitive surface of the film and a vertical data display section for displaying the shooting data in the vertical direction; and a liquid crystal display section provided on the camera body. , a gravitational force whose tip is arranged so as to be inclined at a predetermined angle with respect to the bottom surface of the camera body, and also arranged such that its tip is inclined backward by a predetermined angle with respect to a plane perpendicular to the optical axis of the photographic lens system. a detection type mercury switch; an illumination means for illuminating the horizontal data display section or the vertical data display section of the liquid crystal display section; a detection output of the mercury switch and a detection output indicating shutter operation timing; and a control means for outputting a control signal to the illumination means for selectively illuminating either the horizontal display section or the vertical display section of the liquid crystal display section based on the output. Features: Camera data imprinting device.