JPS60178434A - Data transfer device of camera - Google Patents

Abstract

PURPOSE:To confirm whether data input is possible on sight even in water or not and to confirm transferred data also by providing a device which illuminates an external display device of transfer data with a brightness different between input impossibility and execution of data input. CONSTITUTION:With respect to an illumination driving circuit C of an external display liquid crystal panel 10, if an input lock button switch 15 is turned off, input button switches 13a and 13b are turned on simultaneously, and the output of an AND gate 30 goes to the high level, and an NPN transistor TR33 is turned on, and a lamp 36 is driven by a DC and is lit brightly. If the input lock button switch 15 is turned on (input lock), an NPN TR34 is turned off when an NPN TR35 is turned on, but the NPN TR34 is turned on when the NPN TR35 is turned off, and the lamp 36 is driven by 50% duty cycle and is lit darkly. If the input switch 13a or 13b is turned on at this time, outputs of an NAND gate 19 and an OR gate 20 go to the high level, and therefore, the output of the AND gate 30 goes to the high level, and the lamp 36 is driven with a DC by the NPN TR33 and is lit brightly. Thus, a user confirms data input to a data transfer device by a touch of button switches 13a and 13b and bright lighting of the indicator lamp 36 when he inputs data to the data transfer device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data imprinting device for a camera capable of underwater photography.

In recent years, many cameras have been equipped with data imprinting devices that incorporate an electronic timing circuit into the back cover, display the data generated by this circuit on a liquid crystal display element, and imprint the data onto the film by illuminating it from behind. ing. Most of the input sections for modifying and selecting data, setting film sensitivity, etc. usually consist of push button switches.
If this type of imprinting device is also included in a camera capable of taking underwater pictures, it is necessary to take measures to prevent input pushbutton switches from being pushed in by water pressure during underwater use, thereby preventing erroneous inputs. As a countermeasure for this.

The applicant has proposed that (1) a depth meter is built into the camera, and input is disabled at depths where the input pushbutton switch causes incorrect input (Japanese Patent Application Laid-Open No. 58-173725); Proposals include installing a low-pressure input long switch (filed simultaneously with this application). If the input is locked, all input operations are rejected, and the user can only know this by noting that the data display on the display window does not change due to the input operation. However, if the input is locked underwater, it is difficult to confirm because the amount of light is low, and the user may continue to copy data different from the data they want to imprint without knowing the input lock status. It had the disadvantage of being large.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a data imprinting device for a camera that can confirm whether or not data can be inputted by reading "-1" even underwater, and can also confirm the imprinted data.

The present invention operates in response to external pressure and is controlled by an input a link switch that disables input of imprint data using a manual switch, an input switch, and an input lock switch, and is controlled by an input switch and an input lock switch, and when input is disabled and data input is performed. The external display is equipped with a lighting device that illuminates the external display of the imprinted data with different illumination depending on the time of input, and the external display is brightly illuminated only during operations to ensure that data can be input. This allows you to easily check the entered data.

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

FIG. 1 is an external view 41 of a camera capable of taking underwater photographs, which has a data imprinting device according to an embodiment of the present invention.

■ is the camera body, 2 is the back cover with a built-in date mechanism, 3
4 is a lens barrel, 4 is a winding lever, 5 is a release button, 6 is a rewinding crank, 7 is a finder eyepiece, and 8 is a coupler for attaching an underwater finder, etc. Needless to say, each of these operating members and the back cover 2 have a watertight structure with respect to the camera body 1. Further, its structure is known. 9 is a date imprinting mechanism provided integrally on the back M2; 10 is an external display liquid crystal panel for imprinted data; 11 is a battery cover for the power battery of the date imprinting machine a9;
12 is a mode selection button 77 inches for data content to be imprinted, 13a and 13b are button switches for changing data content,
14 is a 1soB selection button switch, and 15 is an input lock button switch. The operating pressures of the button switches 12 to 15 are set so that the operating pressures of the button switches 12 to 14 are equal and the operating pressure of the button switch 15 is smaller than this.

This is the area of the button 7/r border 15 for each button/r.
This can be done by making the area larger than the area of the buttons I2-14, or by making the on-actuation force of the button switch 15 smaller than the on-actuation force of each button switch 12-14. Therefore, as the pressure (water pressure or air pressure) applied to the camera gradually increases, the nine manual ports and switch 15 are turned on, and then the buttons 2 and switches 12 to 15 are turned on.
14 are turned on almost simultaneously.

Figure 2 is: Route 1777 of the data imprinting device in Figure 51 (
At A, data imprinting part A including electric j'- and i1 time circuits.
, an input control i that controls input to this data imprinting section A
The J'11 circuit B operates in cooperation with the delay circuit C that sets the valid time for input to the data imprinting section A, and the human control circuit B, and operates in cooperation with the external display liquid crystal panel 10.
It consists of a lighting drive circuit.

First, input control circuit B will be explained. This input control circuit B has data input capotan switches i3a, 13b (
12 and 14! jT! :omitted due to l'-), human Karoku Hotan Switch 15, anime game) 17, 18.
Nantes Gate 18. It consists of an OR gate 20 and pull amplifier resistors 38, 38, and 40. The output of the on-gate gate 19 is "low" and "high" only when the input signals 13a and 13b are both on. The OR gate 20 is activated if the input lock button switch 15 is off or at least one of the outputs h to ``high'' of the Nantes gate 19 is satisfied. Switch 13a, 1
If at least one of 3b is off or satisfied, the output becomes "high". Ant gate 17.18
The output becomes "high" only when the input capotant switches 13a and 13b are on, the output of the OR gate 20 is "high" and the output of the delay circuit C is "high", and a data switching signal is sent to the data imprinting trBA. Output.

Next, the delay circuit C will be explained. What is this delay circuit C? p-stable multi-high break 22 , 23 .

24, Or Gate 21, 2! ], ANDGATE 25.
2B, consisting of Inohata 27.28. Or game 1-2
1 inputs signals from the on/off of input button switches +3a and 13b, and its output is output from at least one switch.
When the f-notch is turned on, it always changes from the "low" state to the "high" state.In response to the rise of this ORGA~1.21,
Monostable multi-high breaks 22 and 24 are respectively predetermined'
Outputs the signal of l'itt+t2 c r''.?11
The output of the stable multivibrator 24 is inverted by the impark 27 and input to the monostable multivibrator 23,
The Ci stable multivibrator 23 outputs a "high" signal with a predetermined width t3 in response to the rising edge of the heavy stable multivibrator 24. Therefore, the AND gate 25 receives a "high" signal for a period of time L1 from the rising edge of the OR gate 21. The signal /r'' is input to the AND gate 1 and 26 only during the time t3 after the time t2 has elapsed.The remaining input terminal f of the AND gate 25 The remaining input terminals of the Antogame 126 are connected to the input long button switch 15 through the inverter 2 to the input long button switch ■5, and when the input long button switch ■5 is turned off, the input terminals of the Antogame 126 are
When off, a “high” signal is sent to each AND Kate 26.
5 is given.

Therefore, the output of delay circuit C is (1) always low;
(2) When the input lock button switch 15 is off, the input capotan switches 13a and 13h are turned on and the time E elapses.
1 only pahai'', (3) input long button switch 15
When the input button switches 13a, 13b are turned on, the delay circuit C becomes "high" for a time t3 after a time has elapsed since the input button switches 13a, 13b are turned on.
The time period during which the input in step 3b is valid is set.

The operation of this input control circuit B is summarized as shown in the following table.

Here, the time t2 must be longer than the variation in switch switching timing when the same pressure is gradually increased and applied to the switches 12 to 14.

In addition, monostable multi-high break and in/out are available as needed.
By repeating the combination of heaters, the delay time L2 becomes as large as necessary.

Next, the illumination drive circuit C of the external human foot liquid crystal panel 10 that operates in cooperation with this input control circuit will be described.

In this lighting drive circuit C, the outputs of the OR gates 2o and 21 are both "high", that is, the input long button switch 15 is off, and the capotan switches 13a, 1
AND gate 30 that outputs a "high" signal when at least one of 3b is off and at least one is on.
, the clock pulse generated in the data imprinting section A is divided and the duty cycle is 50 ($) at an appropriate frequency.
A frequency divider 31. which generates a pulse train. NPN transistors 33, 34, 35 . Power battery 3
7 and current limiting resistors 41, 42, and 43.

The operation of this lighting drive circuit C will be explained.

(1) Input lock button switch 15 is off (input port,
When 47/<-32(7) output+t ``low'' te, the NPNI-run transistor 34 is completely off. Also,
Since the output of the OR gate 20 is "high", the outputs of the AND gates 1 and 30 become "high" by turning on both the human capotan switches 13a and 13b at the same time.
The NPN transistor 33 is turned on and the lamp 36 is driven by direct current, lighting up brightly.

(2) When the manual lock button switch 15 is on (manual long), the output of the Inohata 32 is "high", so the NPN
When the transistor 35 is on, it is off, and when it is off, it is off, and the capacitor 36 is driven with a duty cycle of 5O (dark) and is dimly lit. At this time, input switch 13
When either a or 13b is turned on, the output of the Nant gate 18 becomes high (-', and the output of the OR gate 20 becomes "high").
Therefore, the outputs of AND-1 and 30 become "high", and the lamp 36 is driven by direct current by the NPN transistor 33 and lights up brightly.Input switches 13a, +
When both 3b are turned on, the outputs of the NAND games 1 and 19 become 'roll', so the duty cycle of the lamp 36 is 50 (
%) drive remains unchanged.

As explained earlier, the input long button switch 15 functions as a water pressure sensing switch underwater. The above operations can be summarized as shown in the table below.

When the user inputs data into the data imprinting device,
button switch 1 to confirm that the input was indeed made
This can be recognized by the feel of the buttons 3a and 13b and the bright lighting of the indicator lamp 36. Further, it is possible to know whether water pressure sensing is being performed or not by the dim lighting of the display lamp 36, and it is easy to confirm the data contents. In addition, in the water pressure sensing state, even if data input is possible, the input time is longer than in the non-sensing state.
, 13b must be kept pressed to ensure that the input operation is required and to prevent malfunctions. Each input switch 12, 13a, 13b, 14 and input lock button switch 15 have a flexible structure with waterproof structure, and are made of contact members such as leaf springs and coil springs, and conductive on the inner surface of the member. It is also possible to use a momentary switch, etc., which is integrally provided with rubber and pressed against the switch pattern on the circuit board.In addition, the data imprinting part A itself can be widely used as well-known ones, and the illumination of the external display The light emitting body that performs
ED etc. can also be used.

According to the present invention, when data input is possible and data input is performed, the external data display is illuminated with a brightness different from normal times when data input is not possible or otherwise, that is, more brightly. Therefore, the user can easily check whether data can be input or not, and the manual content of the data after input, even in a low light environment such as underwater. Therefore, a camera equipped with the data imprinting device of the present invention enables underwater photography without the risk of malfunction or malfunction.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a camera capable of taking underwater photographs having a data imprinting device according to an embodiment of the present invention, and FIG. 2 is a circuit diagram thereof. 10: External display, 12.13a, 13b, 14: Input switch 15: Human button switch, 36: Lighting lamp, B: Input, TJJ control circuit, C: Delay circuit, D: Lighting drive circuit. Patent applicant Canon Co., Ltd.

Claims (1)

[Claims] An input lock inch that operates in response to external pressure and disables the input of imprint data using the input switch, and is controlled by this input switch and input lock inch, and is activated when input is disabled and when data is input. 1. A data copying and printing device for a camera, characterized in that it is equipped with a lighting device that illuminates an external display of data to be printed with different illumination according to the lighting conditions.