JP2525099Y2 - Camera self-timer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a camera self-timer, and more particularly to a camera self-timer that can change the activation time of the self-timer.

[Problems to be Solved by Conventional Technique and Invention] In a conventional camera self-timer, a self-timer mode setting key is operated to set a self-timer mode and then press a release button. When the release button is pressed, the self-timer is activated, and the shutter is activated in about 10 seconds. If you press the release button again before 10 seconds elapses, the shutter is activated immediately, so in principle, the second release of the release button invalidates the remaining time, and the second release button is pressed as a normal release button Pressing is regarded as equivalent.

The camera self-timer having the above configuration has a drawback in that once the self-timer is started, a predetermined time (generally, 10 seconds) elapses or the shutter must be operated immediately.

[Purpose of the Invention] The present invention has been made in view of the above-mentioned difficulties, and activates a self-timer at a predetermined time different according to the number of times the release button is operated, so that a shutter operates at an elapsed time suitable for a shooting situation. It is an object of the present invention to provide a self-timer for a camera that can be used.

Embodiment Hereinafter, an embodiment of a camera self-timer according to the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a control IC. Control IC1 is CPU
2. The CPU 2 has a RAM 3, and the CPU 2 controls the shutter speed calculation circuit 4 and the focus adjustment circuit 5 by photometry input from a photometer 4a and a distance meter 5a.
Control is performed according to the distance measurement data. The pulse organization circuit 6 organizes the pulse data output from the shutter speed calculation circuit 4 and the focus adjustment circuit 5 and sends the pulse data to the pulse motor drive circuit 8. The pulse motor drive circuit 8 drives the pulse motor 9 to operate, for example, the shutter blades 10a and 10b of the shutter 10.

When the camera is set to the self-timer mode with the self-timer mode setting key TK (hereinafter simply referred to as timer key) and the release button RK is operated, the release button is operated via the decision boxes 12 and 13 of the execution management program 11 shown in FIG. The operation count program 15 is directly started.

The release button operation count program 15 is a program for transferring data of the number of times the release button RK is operated to the activation time calculation program 16 shown in FIG. The data area and data used in the release button operation count program 15 and the activation time calculation program 16 are composed of a timer counter group TCG and a time table TBL shown in FIGS. 4 and 5.

The timer counter group TCG is a data area consisting of 0 to 31 bits and 1 word.
4-6 bits 20mS counter 20TC, 21~23 bits operation flag RKF ₁ ~RKF _3, 29~31 bits sign bit flags
A SBT ₁ ~SBT _3. The time table TBL has a 3-word configuration of 0 to 2 words, and stores 10-second data 10M, 5-second data 5M, and 3-second data 3M, where 10M is 2500 in decimal and 5M is 1250, 3
M is 750. The time table TBL is the operation registers R _{0 to} R ₂
Indexed.

In the execution management program 11, when the release button RK is operated, the release button operation count program 15 is directly started. Operation flag RKF ₁ in box F ₁ a release button operation count program 15 is activated, it is determined whether or not it is activates (whether "1"), when the "0" process F ₈
In a "1", and the process F ₁₁ to sign bit flag SBT ₁ to "1". Similarly in decision boxes F ₂ and F ₃ RKF ₂ and RKF ₃
Of the F9, and according to the judgment, processing F ₉ ,
Executing the _{F 12, F 10, F 13} . However, 20 mS counter 20 in the process F ₄ and F ₅ for monitoring an abnormal operation such as chatter between digits
Set TC. 20TC is counted down by the 4mS counter 4TC, and becomes 0 when counted down 5 times. In the judgment boxes F ₆ and F ₇ , the processes F ₉ and F ₁₀ are executed after counting down 20 TC, respectively.

All RKF ₁ to RKF ₃ are “1” in the decision boxes F ₁ , F ₂ and F ₃
And when processing F ₁₁ , F ₁₂ , and F ₁₃ are executed, F ₁₄
The exposure operation is started via.

The start-up time calculation program 16 is a periodicity program started at a cycle of 96 ms, and when the sign bit flags SBT _{3 to} SBT ₁ are all “0” in the started cycle, the decision box F
₁₆ through to F _18, F ₄₀ waits in F _41. Or execution management program 11 is started time calculation program 16 is waiting at F _41, or start time calculated in 96mS period regardless of the way in either Start calculation program 16, if the calculation midway decision box F ₄₀ Continue the calculation via. Furthermore, to start a new calculation and is a sign bit flag SBT ₃ ~SBT ₁ while continuing the calculation varies according to the judgment box F ₁₆ to F _17.

A sign bit flags SBT _3, SBT ₂ is "0" SBT ₁ is a SBT ₁ processing F ₂₁ when the "1" to "0", the process 10 seconds data 10M time table TBL shown in FIG. 5 accumulate arithmetic register R ₀ in F _24. Further, in the process F ₂₆ to the arithmetic register R ₁ 5
Store 5M of second data. This flow causes the light emitting diode TD in the process F ₂₉ from the case to operate the shutter 10 in the longest 10 seconds. This indicates that the exposure is started after 10 seconds unless the release operation is performed thereafter.
It was allowed to emit light emitting diodes TD, subtracts one numerical calculation register R ₀ in the processing F _30. Subtraction is performed via the decision box F ₃₉ by whether 4mS counter 4TC processing F ₃₈ becomes "0", "1". That is, the value of the operation register _R0 is subtracted at a period of 4 ms. When numerical calculation register R ₀ is smaller than 5 sec data 5M numerical calculation register R ₁ is determined at the decision box F _36, when the 3-second data 3M determines at decision box F _37. 3 in operation register R ₂ in process F ₂₅
The second data 3M accumulates, the light emitting diode TD in the process F ₂₈ 1
Flashes at 60INT for minutes. This indicates that exposure is started after 5 seconds unless a release operation is performed thereafter.
Similarly, in the process F ₂₇ elapses 7 seconds flashing the light emitting diodes TD in 1 minute 120INT. This indicates that the exposure starts after 2 seconds. After 10 seconds, subroutine F
The shutter 10 is operated at _32, and initialized in process _{F 33, F 34, F 35} , and is in a standby condition in F _41.

Similar to the case of SBT ₁ when the sign bit flags SBT _3, SBT _2, performs processing _{F 19, F 20, F 22} , F 23.

[Operation of the Invention] When the camera self-timer of the above configuration is used to set the camera to the self-timer mode with the timer key TK and the release button RK is pressed once, the release button operation count program 15 is directly started from the execution management program 11, and the decision box F _1, processing
F _3, the sign bit flag SBT ₁ in F ₁₁ is "1". The start-up time calculation program 16 judges “1” of the sign bit flag SBT _{1 in} the judgment box F ₁₈ and
At F ₂₉ . Subtracting 2500 from 1 to 10 seconds Data 10M time table TBL which is stored in the arithmetic register R ₀ in F _30. Subtraction middle starting time calculation program 16 continues to subtract via decision box F ₄₀ to be activated. 40 with 100 subtractions
When the second release button RK is operated at 0 ms, the release button operation count program 15 is activated, and the subtraction operation is interrupted. "1" of the SBT ₂ in the next cycle is determined, F ₂₃ at 5 seconds data 5M data time table TBL which is interrupted by 2500-100 = 2400 because it is stored in the arithmetic register R ₀ is 5 seconds data 5M Of 1250. Therefore, 2400-1250 = 1150
The shutter 10 operates in 5.4 seconds, which is 4.6 seconds earlier. The light emitting diode TD sequentially changes light emission, 60INT blinking, and 120INT blinking. The time table data in the above embodiment is 10 seconds, 5 seconds,
Not limited to 3 seconds.

Incidentally, when the actual execution management Furoguramu signs bit flags SBT ₁ ~SBT ₃ unchanged Starting time calculation program 16 so as not to be activated.

[Effects of the Invention] As is clear from the above embodiments, the camera self-timer according to the present invention includes a self-timer mode setting key,
A release button operation count storing means for storing the number of release button operations when the self-timer mode setting key is operated in the self-timer mode; and a release button operation count stored in the release button operation count storage means. And a self-timer activation time calculation means for activating the self-timer at a predetermined time different according to
There is an effect that the self-timer is started at a predetermined time different according to the number of times of operation of the release button, and the shutter can be operated at an elapsed time suitable for a shooting situation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a camera self-timer according to the present invention, FIG. 2 is a flowchart of a release button operation frequency program used in the camera self-timer of FIG. 1, and FIG. 3 is an operation time calculation program. 4 and 5 are data configuration diagrams. RK: Release button TK: Self-timer mode setting key 15: Release button operation count program (release button operation count storage means) 16: Start-up time calculation program (self-timer start-up time calculation means)

Claims (1)

(57) [Scope of request for utility model registration] 1. A self-timer mode setting key, a release button operation number storage means for storing the number of operation of a release button when the self-timer mode setting key is operated to enter a self-timer mode, and the release button operation A self-timer for a camera, comprising: self-timer activation time calculation means for activating a self-timer at a predetermined time different according to the number of times of operation of the release button stored in the number storage means.