JPH0215444A - Video tape recorder - Google Patents

Abstract

PURPOSE:To suppress the discharge of a battery during a temporary stopping period and to extend an operation time in a battery mode by setting the temporary stopping period at the time of the battery power source operation of a video tape recorder shorter than the temporary stopping period of an alternating current power source operation. CONSTITUTION:In the picture recording condition of the VTR, when a pose button 121 is operated to be made into a pose condition, only a drum motor 21 is rotated, a capstan motor 22 and both reel motors 22 and 23 are stopped, and simultaneously a timer 11 to be built-in a microcomputer 10 starts timing. Based on a signal to respectively correspond to the open/closing of a switch S, the computer 10 judges whether or not the VTR is in the battery mode. In an AC mode, whether or not a prescribed pose time has passed from shifting into the pose condition, in a batter mode, the judgement is executed after a prescribed time set in a timer 11, and the battery discharge during the pose period in the battery mode is suppressed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a video tape recorder (V
'I' R).

[Summary of the invention]

In the present invention, the AC mode and the battery mode are
'rR, set the pause period in battery mode to AC
By setting it shorter than the Bose period in mode,
This suppresses battery discharge during the pause period and extends the continuous use time in battery mode.

(Prior Art) Conventionally, in the V 'I' R, when the pause button is operated to enter the pause state, the tape stops running, but the head drum continues to rotate. Then, the same portion of the magnetic tape is successively scanned with a magnetic rad.

In order to avoid damage to the magnetic tape due to this continuous scanning, conventionally, after a predetermined period of time has elapsed in the pause state, the pause state is automatically released and the system enters the standby state, and the rotation of the head tram also stops. was.

If the pause state can be maintained for too short a time, it becomes inconvenient to use in tape editing, etc., so it has been set to, for example, 8 full culm degrees.

(Problem to be Solved by the Invention) By the way, a portable V'r R that is used in combination with a 'l'' V camera does not operate on an AC power supply (A
In addition to C mode), operation using a secondary battery (batch remote) is also possible. As a secondary battery,
A battery bag consisting of a plurality of sealed Ni-Cd131 cells connected in series is mainly used.

However, in order not to impair the vJ 1itt property of V'rR, the weight of the battery bank is limited, and its capacity is therefore small, so as mentioned above, when the Bose period is relatively long, - There is a problem in that the upstream consumption caused by the rotation of the VTR promotes discharge of the battery bank, and the effective continuous operating time of the VTR in the battery mode 1 is shortened.

In view of this, an object of the present invention is to provide a video tape recorder in which the pause period in bunch remote is shortened.

[Means to solve the problem]

In the present invention, the AC power supply operation and the battery power supply operation are performed at vJ.
This video tape recorder is a high-performance video tape recorder in which the pause period when operating on battery power is set to be shorter than the pause period when operating on AC power.

[Function] According to the present invention, battery discharge during the -hour stop period is suppressed, and the continuous operating time of the bunch remote can be extended by 1 liter.
Becomes jJ Noh.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a video tape recorder according to the present invention will be described below with reference to FIGS. 1 to 4.

The configuration of one embodiment of the present invention is shown in FIG.

In FIG. 1, (10) is a system control circuit (microcomputer) that controls a timer (Li) and controls n( IM operation button (121) (12J
), (]23)...(12n) are supplied, and the output of the system 11-control circuit (10) is supplied to the servo circuits (13), (14) and the reel control circuit (15), respectively. be done.

(21) is a drum motor, (22) is a capstan motor, (23) is a supply reel motor, (24) is a take-up reel motor, and the tram motor (2I) and capstan motor (22) include: Drive signals are supplied from the corresponding servo circuits (13) and (14) via drive amplifiers (not shown), and both reel motors (2
3) and (24) are each supplied with a drive signal from the reel control circuit (15) via a drive amplifier (not shown).

S is a mode discrimination switch for discriminating between AC mode and battery mode, and as described later, in this embodiment, it is closed in battery mode, and an appropriate discrimination signal is sent to the system control circuit (lO). supplied to

Next, the operation of this embodiment will be explained with reference to FIG.

v When Tt< is in recording mode, press the Bose button (12
When 1) is operated, V ``I''R goes into a pause state, and as mentioned above, only the tram motor (2I) continues to rotate, and the capstan motor (22) and both reel motors (23) , (24) stops. At the same time, a timer (11
) starts and time measurement begins (step ω). Then, in the microcomputer (10), V'
It is determined whether rR is a battery mode (step ■).

In the case of AC mode, for example, 8 after entering the pause state.
It is determined whether or not a pause period set in minutes has elapsed (step ■).

In the case of battery mode, the set time of the timer (11) is shortened to, for example, 5 minutes (step ■), and it is determined whether or not this 5-minute pause period has elapsed (step ■).

Once the pause period for each mode as described above has elapsed,
The timer (11) stops, the time measurement ends, and the timer (11) stops.
11) The tram motor (21) is stopped and the pause state is released based on the control output of the system control circuit (10), and the V
'I' R goes into standby state.

As described above, according to this embodiment, the pause period in the case of bunch remote is set to be relatively short, and current consumption is suppressed.

Next, the specific configuration of the mote discrimination switch S will be described with reference to FIGS. 3 and 4.

In FIG. 3, (30) is a battery case,
Positive and negative power receiving terminals (32) and (33) and a pair of discrimination terminals (341) and (342) are provided on the inner bottom surface of the synthetic resin casing (31). Each terminal (3
2) to (341 are made of an elastic conductor such as phosphorus, for example, and each has a contact portion formed in an arc shape. (35) is a lid, and the casing (31) It can be opened and closed freely.

In Figure 4, (40A) has ACC back,
An AC adapter (not shown) that also serves as a charger is housed in a synthetic resin casing (41A), and the DC output of this AC adapter is sent to positive and negative output terminals (42A) and <43A). Each is derived.

In addition, (40B) has a battery puncture, and multiple Ni-Cd batteries (41B) are housed in one synthetic resin body (41B).
(not shown) are connected and stored in series, and this Ni-
The DC output of the Cd battery is transmitted through the positive and negative output terminals (
42B) and (431), respectively.

(44) is a metal piece for detecting charger r,
When a flat battery (40B) is loaded into the charging device, charging is terminated when the temperature of the metal piece (44) rises to a predetermined value, for example.

AC pack (40Δ) and battery puncture (4011)
When either is loaded into the battery case (30),
The power receiving terminals (32) and (33) come into contact with the output terminals (42^) and (438) or (42B) and (43B), and the power supply to the VTR becomes 5J.

Furthermore, in the case of the battery bank (40B), the charging end detection piece (44) comes into contact with both the FJ1 separate terminal (341) and (3, t-) of the battery case (3o). Due to the dirt, the mode discriminating swifter S shown in FIG. 1 is closed, so that the Bose period in the battery mode is shorter than in the AC mode, and the 'IpIvR power is saved.

(Effects of the Invention) As detailed above, according to the present invention, the pause period of the hatch remote is set shorter than the pause period of the AC mode, thereby suppressing battery discharge during the pause period. As a result, a video tape recorder with extended batch remote operation time can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of a video tape recorder according to the present invention, FIG. 2 is a flowchart for explaining the operation of an embodiment of the present invention, and FIGS. 3 and 418! J
FIG. 1 is a route plan view showing the configuration of essential parts of an embodiment of the present invention. (10) 4; J'z stem control circuit (microcomputer), (11) is a timer, (121) is a - time stop button, (21> is a drum motor, and S is a mode discrimination switch. Agent Sadato Ito Hidemori Matsukuma bu 0 21 Drum motor 2Z Capstan motor S mode version "Switch real? @(!'J Figure 1 LOL 7 de threat") Flame mouth No. rr!!! Dan Q Battery case implementation example 9 stores No. 3 Figure 3B 2B 40A AC Nogutsu 7 408

Claims (1)

[Claims] A video tape recorder capable of AC power operation and battery power operation, characterized in that the pause period during battery power operation is set shorter than the pause time during AC power operation. video tape recorder.