JPS596516Y2 - Recording/playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording and reproducing apparatus, and particularly to a recording and reproducing apparatus suitable for use in a one-touch recording type video tape recorder (hereinafter referred to as a VTR).

In conventional VTRs, a playback mode is obtained by operating a playback button, and a record mode is obtained by operating a playback button and a record button together.

The device was designed so that when only the record button was operated alone, the E-E mode was obtained and the input signal could be monitored.

In addition, in the main text, E-E mode (electric-
(electric mode) is a mode in which the electrical signal extracted as the output of the recording circuit is directly supplied as input to the reproduction circuit for monitoring without converting it into a magnetic signal via a magnetic head. say.

However, in the one-touch recording method in which the playback mode is obtained by operating the playback button and the recording mode is obtained by operating the record button, it is impossible to obtain the E-E mode by operating the playback button or the record button. It becomes.

The present invention attempts to overcome the above-mentioned problems by focusing on the power switch. a recording system circuit connected to a power supply via a power supply circuit) and a reproduction system circuit always connected to a power supply, and supplying power to the recording system circuit through the switch circuit when the power supply is turned on. By supplying power to the recording system circuit through the switch circuit during a recording operation, it is possible to monitor the input signal and to enable a recording operation, and the reproduction operation selection means The present invention relates to a recording and reproducing apparatus characterized in that when a reproducing operation is performed by operating the switch circuit, the power supply to the recording system circuit is cut off to enable the reproducing operation.

Therefore, according to the present invention, there is no need to provide a special switching device for switching to the E-E mode, and the operating mechanism is simplified.

This invention is described below as a one-touch recording VTR.
An example applied to the invention will be explained with reference to the drawings.

As shown in FIG. 1A, power is supplied to a recording system circuit 1 connected to the output side of a video camera or a tuner (none of which are shown), for example, through a parallel circuit consisting of a switch SW1 and a switch SW2. It is now done through

The output of the recording system circuit 1 is directly supplied as an E-E signal to the reproduction system circuit 2, and is also supplied to the head 3 via a changeover switch SW3.

A 10B power source is directly supplied to the reproduction system circuit 2.

The switches SW1 and SW2 are connected to a record button 4 and a playback button 5, respectively, and can be switched.

That is, as shown in FIG. 2A, a pin 7 is implanted in the recording slider 6 to which the recording button 4 is fixed.

Further, the tip of the slider 6 is in contact with a bent piece 10 of a lever 9 which is rotatably supported around a pin 8.

This lever 9 is biased by a coil spring 11 to rotate clockwise in FIG. The reproducing slider 13 is engaged with a protruding piece 14 protruding from the side thereof.

The tip of the reproduction slider 13 is in contact with a bent piece 17 at one end of a lever 16 that is rotatably supported around a pin 15.

The other end of this lever 16 is connected to the link 1 by a pin 18.
9, and this link 19 is further connected to pin 20.
It is connected to the L-shaped lever 21 by.

The lever 21 is rotatably supported around a pin 22, and is urged to rotate clockwise in FIG. 2A by a coil spring 23.

A bent piece 24 formed at one end of this lever 21 is in contact with the operating piece of the switch SW1.

The pin 7 of the recording slider 6 is in contact with one end of a lever 27 that is rotatably supported by a pin 25 and biased to rotate counterclockwise by a coil spring 26 .

The other end of this lever 27 is connected to an L-shaped slider 29 via a coil spring 28, and a bent portion 30 at the tip of this slider 29 is marked so as to be able to come into contact with the operating piece of the switch SW2. ing.

Therefore, in the stop mode shown in FIG.
This switch SW1 is in a closed state without pressing the first operation piece.

Further, the bent portion 30 of the slider 29 is spaced apart from the operating piece of the switch SW2, and therefore the switch SW2 is open.

Therefore, as shown in FIG. 1A, in this stop mode, power is supplied to the recording system circuit 1 via the switch SW1.

Further, the reproduction system circuit 2 is connected to a 10B power source.

For this reason, in this stop mode, the signal from the tuner or camera is transferred from the recording system circuit 1 to the reproduction system circuit 2.
It is configured such that the input signal can be directly transmitted to the input signal and thereby the input signal can be monitored.

In other words, it is configured to be in E-E mode.

Next, we will discuss the case where the recording mode is switched by pressing the recording button 4 as shown in FIG. 2B. In this mode, the forward movement of the recording slider 6 causes the pin 6 to
By pressing one end of the lever 27, the lever 27 is rotated clockwise about the pin 25 against the coil spring 26.

For this purpose, the lever 27 and the slider 29 connected by the coil spring 28 move, and the slider 29 is moved.
The new song section 30 of No. 9 presses the operating piece of the switch SW2 to close the switch SW2.

At the same time, the tip of the recording slider 6 is connected to the bent piece 1 of the lever 9.
0 to rotate this lever 9 counterclockwise about the pin 8 against the coil spring 11.

For this purpose, the pin 12 of this lever 9 is connected to the playback slider 13.
The slider 13 is moved by pressing the protruding piece 14 of the slider 13.

As a result, the tip of the slider 13 presses the bent piece 17 of the lever 16, causing the lever 16 to rotate clockwise about the pin 15.

Therefore, the lever 21 connected to the lever 11 through the link 19 rotates counterclockwise around the pin 22 against the coil spring 23, and the bent piece 24 of the lever 21 rotates counterclockwise about the pin 22.
presses the operating piece of switch Sr1, thereby opening switch SW1.

In addition, in the switching operation of the switches SW1 and SW2 based on the operation of the record button 4, first the switch S
The strokes of the lever and link system are set so that W2 closes and switch SW1 subsequently opens.
This prevents any cut in the power supply to the recording system circuit 1.

Therefore, in this recording mode, power is supplied to the recording system circuit 1 via the switch SW2, as shown in FIG. 1B.

The switch SW3 is turned to the recording side.

For this purpose, the output of the recording system circuit 1 is supplied to the head 3,
A video signal is recorded on a magnetic tape (not shown) that is in contact with this head 3.

At the same time, the output of the recording system circuit 1 is directly supplied to the reproduction system circuit 2, so that the video signal being recorded can be monitored.

Next, we will discuss the case where the playback button 5 is pressed to switch to the playback mode as shown in FIG. 16 rotates clockwise around pin 15.

Therefore, the lever 21 connected to the lever 16 via the link 19 rotates counterclockwise about the pin 22 against the coil spring 23, and the bent piece 24 of the lever 21 rotates counterclockwise about the pin 22.
presses the operation piece of switch SW1 to release this switch SW.
Open 1.

Moreover, since the recording slider 6 does not move forward at this time, the switch SW2 remains open.

Therefore, in this reproduction mode, as shown in FIG. 1C, the power supply to the recording system circuit 1 is cut off, and this circuit 1 ceases to operate.

Therefore, the E-E signal is not transmitted from the recording system circuit 1 to the reproduction system circuit 2.

However, when the switch SW2 is turned to the reproduction side, the video signal from the magnetic tape (not shown) in contact with the head 3 is sent to the reproduction system circuit 2, and the video signal is reproduced.

Although the present invention has been described above with reference to embodiments, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, the signal is extracted from just before the head 3 and applied to a monitor circuit that supplies this signal just after the head 3. However, as shown in FIG. It is also possible to apply it to a monitor circuit that extracts the output of the circuit and supplies it to the demodulator 34.

In this case, power is supplied to the modulator 31 via the parallel circuit of the switches SW1 and SW2 that are linked to the record button and the playback button, and the power is supplied to the recording amplifier 32 via the switch. Through SW4, the regenerative amplifier 33
Power is supplied to the switch via a series circuit of switches SW4 and SW5.

This switch SW4 is related to the record button 4, and is switched to the recording side when this button is operated to enter the recording mode, and is switched to the playback side in other modes.

Therefore, the recording amplifier 32 is designed to operate only in the recording mode.

Further, the switch SW5 is related to the playback button 5, and the switch SW5 is closed only when this button 5 is pressed to enter the playback mode.

In this regeneration mode, the switch SW4 is switched to the regeneration side, so that the regeneration amplifier 33 operates only in the regeneration mode.

Furthermore, the present invention can also be applied to an E-E system called direct E-E as shown in FIG.

In this system, the output of the pre-emphasis 36 is directly supplied to the pre-emphasis 37.

In this system, both the pre-amplifier 35 and the pre-emphasis 36 are connected to the power supply via the parallel circuit of the switches SW1 and SW2 which are linked to the record button and the playback button, and the modulation circuit 31 and a recording amplifier 32 are connected to a power supply via a switch SW4, a reproduction amplifier 33 and a demodulator 34 are connected to a power supply via a series circuit of switches SW5 and SW4, and De-emphasis 37 and output amplifier 38 are connected directly to the power supply.

Furthermore, although the above embodiment is an application of the present invention to a VTR, the present invention can also be applied to a tape recorder.

As described above, according to the present invention, it is possible to monitor the input signal by supplying power to the recording circuit through the switch circuit when the power is turned on. There is no need to provide a separate switching device, and the operating mechanism is simplified, and in particular, the operation of the E-E mode in a one-touch recording type recording/reproducing apparatus is simplified.

[Brief explanation of the drawing]

1 and 2 show an embodiment in which the present invention is applied to a one-touch recording type VTR. FIG. 1 is a block diagram of the circuit, where A is a stop mode and B is a recording mode. mode, C indicates the playback mode, and FIG. 2 is a plan view of the operating mechanism of the switches SW1 and SW2, in which A is the stop mode, B is the record mode,
C each indicates a playback mode. 3 and 4 are block diagrams of modified examples, respectively. Note that in the symbols used in the drawings, 1 is a recording system circuit, 2 is a reproduction system circuit, 5 is a reproduction button, and SW1 and SW2 are switches.

Claims (1)

[Scope of utility model registration request] A recording system circuit is connected to the power supply through a switch circuit that is opened when the reproduction operation selection means is operated, and a reproduction system circuit is connected to the power supply at all times. The input signal can be monitored by supplying power to the recording system circuit through the switch circuit, and the input signal can be monitored and recording can be performed by supplying power to the recording system circuit through the switch circuit during recording operation. The recording and reproducing apparatus is characterized in that when the reproducing operation selection means is operated to select the reproducing operation, the switch circuit is opened to cut off the power supply to the recording system circuit and the reproducing operation is enabled. Device.