JP3240160B2 - Video camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video camera, and more particularly to a video camera which has a recording function of both a single action system and a double action system, and which can be switched to any one system with one touch.

[0002]

2. Description of the Related Art In a conventional video camera, recording is started and stopped by operating a recording button provided on a side grip on a side of a camera body.
The mainstream of this type of recording button is a double action system in which a start and a stop are alternately instructed for each button operation.

On the other hand, in the single action system, recording is started and stopped by operating a recording button, but the recording button in this system records while being pressed, and stops when the finger is released from the recording button. I have.

[0004]

The recording button of the double action type is suitable for long-time recording. However, if the user forgets to press the button, he or she will record the ground, or if he or she presses wrongly, it will fail to capture an important scene. There is a risk of failure.
On the other hand, the recording button of the single action type can prevent a failure such as taking a picture of the ground because it stops when the finger is released, but is not suitable for long-time recording.
In addition, the single-action recording button may be accidentally pressed momentarily while moving with the grip of the video camera hanging or moving the camera from the shooting position to the hanging position.

It is an object of the present invention to provide a video camera which has the advantages of both a double-action recording method and a single-action recording function.

[0006]

According to the present invention, there is provided a camera comprising: a recording button provided on a camera;
The recording recording button and recording each time it is pressed and Portable action method for instructing stop recording and the alternating, while the record button is pressed will command the recording, and the recording button is not pressed Single action method to command stop, and independent setting separately from the recording button
The double action method
And action changeover switch for switching one of the methods of the formula or the single-action scheme <br/> selectively, recording and the recording stop based on the Portable action method or the single action method selected by the action selector switch Control means for issuing a command.

[0007]

According to the present invention, when the action switching means provided in the video camera is switched to the double action means or the single action means, recording can be performed by the double action method or the single action method, respectively. Therefore, one of the methods can be selected according to the photographer's preference, and also according to the recording target and the situation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a video camera according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a rear view of the video camera body 20 viewed from the eyepiece side of a viewfinder 22 of the video camera. FIG. 1 shows a case where the thumb rest 10 </ b> A is projected from the video camera body 20. As shown in FIG. 1, the video camera body 20 is provided with a slide member 10 which is movable in the left-right direction in FIG. A recording button 12 is provided in half. The slide member 10 is locked in a state of being stored in the video camera body 20 as described later, and a lock release button 14 for projecting the locked slide member 10 is provided on the thumb rest 10A. I have. Note that 24A and 24B in FIG.
Is a guide rail for slidably guiding the slide member 10.

An action button (action SW) 28 to be described later is provided on the surface 26 of the video camera body 20. The action button 28 can be switched between a single-action mode and a double-action mode by sliding left and right. Has become. That is, when the action button 28 is switched to the double action mode, the recording start and the recording stop are alternately repeated each time the recording button 12 is pressed. That is, once the recording button 12 is pressed, recording continues even if the finger is released from the button, and when the recording button 12 is pressed again, recording is stopped.

When the action button 28 is switched to the single action mode, recording is performed only while the recording button 12 is being pressed, and stopped when the finger is released. 2 and 3 show the first embodiment of the video camera according to the present invention.
An example is shown. As shown in FIG. 2, the action button 28 is connected to the microcomputer 30 and can be switched to a single action side or a double action side by performing a sliding operation. The microcomputer 30 is connected to another known number of switches of the video camera, an image processing circuit, a recording circuit, and the like, and outputs a signal for recording a recorded image on a recording medium. Record button 12
Is connected to the microcomputer 30 and starts or stops recording when pressed.

FIG. 3 shows a processing flow of the microcomputer 30. First, a main switch and a standby switch (not shown) are operated to enter a standby state. Next, at step 34, it is determined whether or not the recording button 12 is pressed. When the recording button 12 is pressed, it is determined at step 36 whether the action button 28 is the double action side or the single action side. If the action button 28 is connected to the single action side in step 36, it is determined in step 38 whether or not the apparatus is in a standby state.

If the action button 28 is connected to the double action side in step 36, it is determined in step 42 whether or not the recording button 12 has been pressed again. If the recording button 12 is pressed again, if the recording is being performed in step 44, the standby state is set (step 46).
When the recording is not being performed (that is, in the standby state), the state is switched to the recording state (step 48).

If the recording button 12 is not pressed in step 34 (that is, if the finger is released from the recording button 12),
In step 50, it is determined whether the action button 28 is connected to the single action side or the double action side. If the action button 28 is connected to the single action side, it is determined whether or not recording is in progress.

In this manner, by switching the action button 28, it is possible to easily switch between the single action system and the double action system. 4 to 6 show a second embodiment according to the present invention. FIG. 4 is a block diagram showing a recording start / stop control unit.
Is an action button, 56 is a falling one-shot multivibrator, and 58 is a rising one-shot multivibrator. When A to D are input / output signals,
When the recording button 12 is off, the signal A is at the H level,
When on, the signal A is at the L level. When the action button 28 is on the single action side, the signal C goes high, and when the action button 28 is on the double action side, it goes low. FIG. 5 shows a timing chart for a double action, and FIG. 6 shows a timing chart for a single action. That is, in FIG. 5, when the action button 28 is on the double action side, the signal C is at the L level, and when the recording button 12 is pressed and released, the signal A is at the L level while being pressed. Record button 12
When is pressed, the falling one-shot multivibrator 56 outputs a signal of a predetermined pulse width with a slight delay. During this time, the signal B goes to the H level. 5
8 outputs a signal of a predetermined pulse width with a slight delay, during which the signal B becomes H level. However, the signal D of the NAND output
Remains at the H level, the CPU starts recording at the first falling edge of the AND output, enters the recording state even if the recording button is pressed and released once, and obtains the same AND output when pressed and released next time. Then, the CPU instructs the stop of the recording at the next fall of the AND output, and repeats this alternately. In this manner, the double action recording is possible.

In FIG. 6, when the action button 28 is on the single action side, the signal C is at the H level,
When the recording button 12 is in the pressed state, the signal A becomes L level. When the record button 12 is pressed, the falling one-shot multivibrator 56 outputs a signal having a predetermined pulse width with a slight delay, and during this time, the signal B becomes H level.
At this time, the signal D of the NAND output becomes L level, and AND
The output is at the L level, the CPU instructs the start of recording at the first fall of the AND output, and enters the recording state while the recording button 12 is pressed.

When the finger is released from the recording button 12 and the pressing operation is stopped, the output signal A of the recording button 12 becomes H level, and the AND output outputs a short pulse.
When the finger is released, the rising one-shot multivibrator 58 outputs a signal of a predetermined pulse width with a slight delay, during which the signal B is at the H level. At this time, the NAND output signal D becomes L level, and the AND output emits an L level signal having a predetermined pulse width during this period, and the CPU instructs the stop of recording at the next falling of the AND output to stop recording. In this way, the single-action recording can be performed.

[0017]

As described above, according to the video camera of the present invention, recording can be easily performed by the single action system or the double action system by switching the action switching means to the double action or the single action.

[Brief description of the drawings]

FIG. 1 is a rear view of a video camera according to the present invention.

FIG. 2 is a control block diagram of the first embodiment of the present invention.

FIG. 3 is a control flowchart according to the first embodiment of the present invention.

FIG. 4 is a control block diagram according to a second embodiment of the present invention.

FIG. 5 is a timing chart of a double action according to a second embodiment of the present invention.

FIG. 6 is a timing chart of a single action according to a second embodiment of the present invention.

[Explanation of symbols]

 12. Record button 20 ... Video camera body 28 ... Action button

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-127876 (JP, A) JP-A-1-103073 (JP, A) JP-A-1-166428 (JP, A) 132336 (JP, U)

Claims (1)

(57) [Claims] 1. A recording button provided on a camera, a double-action method for alternately instructing recording and recording stop each time the recording button is pressed , and a pressing operation of the recording button. during the commands recording, a single-action system in which the recording button for instructing the stop recording to be not pressed, said a recording button provided separately independently, pre-cut換操
Depending on the operation, the double action method or the single
And action changeover switch for switching one of the methods of action method selectively performs a command recording stop the recording on the basis of the action the motor <br/> Bull action method or the single action method selected by the change-over switch And a control means.