JPS63244434A - Tape control circuit for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain one reciprocal tape driving without fail when the reciprocal driving mode is set by providing a means discriminating to which direction, forward or reverse, the tape feeding direction is designated to change over the forward and return paths even when the tape feed is initiated from either forward or reverse direction. CONSTITUTION:When the reciprocal mode set by a mode setting means 100, whether the designated direction is forward or reverse is discriminated by using an operation signal, and when the result of discrimination by a discrimination means 400 shows the forward drive, the tape drive direction of a magnetic recording and reproducing device is selected to be the forward direction, and when a tape end detection signal is supplied, the tape driving direction is switched into the reverse direction when the reversing from the result of discrimination, the tape drive direction of the magnetic recording and reproducing device is selected to be the reverse driving and when the tape end detection signal is fed, the tape driving direction is switched into the forward direction. Thus, when the reverse driving mode is designated, even if the tape driving is started from either forward or reverse direction, the reciprocal tape driving is attained.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) This invention relates to a tape control circuit for a magnetic recording and reproducing device, and the present invention relates to a tape control circuit for a magnetic recording and reproducing device, and the present invention relates to a tape control circuit for a magnetic recording and reproducing device. This is a circuit designed to increase the voltage.

(Prior Art) Some recent cassette tape recorders are of a type that automatically switches to a reverse playback state when tape playback in one direction ends. Such a system is called auto-reverse, and its operating procedure is shown in FIG. 4.

First, it is determined in step S1 whether or not the reciprocating drive mode is set. This setting can be made by pressing a switch marked with a symbol provided in the mode setting section of the magnetic recording/reproducing device. Usually, a magnetic recording/reproducing device is provided with a - symbol (one-way drive can be set) and a Φ symbol (endless drive can be set).

If the reciprocating drive mode is set, it is determined in step S2 whether the forward direction feed designation key is pressed or the reverse direction feed designation key is pressed. If forward direction feeding is specified, forward direction feeding of the tape is started and the tape is driven until a tape end detection pulse is obtained. When the tape end detection pulse is detected in step S3, the tape is switched to reverse direction feeding (step S4). Then, the tape continues to be fed in the reverse direction, and when a tape end detection pulse is obtained in step S5, the tape feeding is stopped (step S6).

On the other hand, if the reverse direction feed designation key is pressed in step S2, the tape starts to be fed in the reverse direction, and the tape is driven until a tape end detection pulse is obtained. When a tape end detection pulse is obtained in the reverse direction feeding state, the apparatus is automatically stopped (steps S7 and S8).

(Problems to be Solved by the Invention) According to the above-described conventional magnetic recording and reproducing apparatus, if there is a tape end detection pulse while the tape is being fed in the reverse direction, the apparatus always stops. Therefore, in step S2, if the reverse direction feed designation key is pressed, only one-way playback or recording will actually be performed despite the reciprocating drive mode. Therefore, recording errors may occur during recording, and during playback, it may be necessary to reload the cassette.

Therefore, the present invention provides a magnetic recording and reproducing device that enables reciprocating tape drive regardless of whether tape feeding is started in the forward or reverse direction when the reciprocating drive mode is specified. The purpose is to provide a tape control circuit.

[Structure of the Invention] (Means for Solving Problems) In the present invention, when reciprocating drive is set by the mode setting means, the tape feeding direction is positive.

A determination means for determining which direction is specified in the opposite direction, and if the determination result of this determination means is the forward path, the tape drive direction is set as the forward path, and when a tape end detection signal is obtained, the tape drive direction is switched to the backward path. a first switching means; and a second switching means that sets the tape driving direction to the backward path when the determination result of the determining means is a backward path, and switches the tape drive direction to the forward path when a tape end detection signal is obtained; Drive in the forward and backward directions can be obtained regardless of the order.

(Function) By the means described above, in the reciprocating drive mode, tape drive in one direction (outward and return passes = 5) is obtained regardless of the order of the tape feeding direction, and it ends with only practical one-way drive as in the conventional case. Never.

(Example) Examples of the present invention will be described below with reference to the drawings. 1st
The operating procedure according to one embodiment of the invention in the box is shown, and FIG. 2 is a schematic diagram of the configuration of the magnetic recording and reproducing apparatus according to the invention.

As shown in FIG. 2, the magnetic recording/reproducing apparatus includes a mode setting section 100 for setting an operation mode, and further includes a mode setting section 100 for setting an operation mode, and a mode setting section 100 for setting an operation mode.
-PLAY), stop (STOP), reverse playback (R
An operation unit 200 is provided for specifying functions such as -PLAY) and rewind (REV).

The mode setting section 100 includes switch sections 1a and lb for setting a one-way drive mode indicated by a symbol, a reciprocating drive mode indicated by a symbol, and an endless drive mode indicated by a 0 symbol.
, lc. The operation unit 200 also has functions such as record, fast forward, forward play, and stop.

Each switch section R for specifying reverse direction playback, 1 rewind, etc.
EC, FF, F-PLAY, 5TOP.

R-PLAY and REW are provided.

The output of each switch section described above is output from a switch output circuit 300.
The signal is supplied to the input port 401 of the control section 400 via the control section 400. The system control unit 400 has a random access memory (
It has a RAM), a central processing unit (CPU), and a random access memory (ROM), and controls the device according to mode settings and function specifications. System control unit 400
is connected to the reel motor 501 via the drive circuit 500.
, capstan motor 502, plunger 503, etc. The rotation direction and speed of the reel motor 501 and capstan motor 502 are controlled so that the tape can be driven in any direction.

The apparatus of the present invention obtains a characteristic operation when the above-mentioned reciprocating drive mode is set, and will be described below with reference to FIG. 1.

In the operating state, the system control unit 400 first determines what mode is set in the mode setting unit 100. Assuming that the reciprocating drive mode is now set, this is explained in steps Sll and S.
12. S13. Then, the process moves to determining the content of the operation signal from the operation unit 200 (S14).

If an operation signal is input (step 515), it is determined whether forward playback or backward playback is specified (step 816, 5IT).
).

If forward playback is specified, a forward playback flag is generated and temporarily stored in memory (RAM) in step 318, and the system is placed in a forward playback state. Then, it waits for the tape end detection signal to be input. Further, if reverse playback is specified, this is determined in step S17, and in this case, a reverse play flag is generated and temporarily stored in the memory (RAM), and the system is placed in a reverse playback state. . Then, the process moves to step S20 and waits for the tape end detection signal to be input.

When the tape end detection signal is obtained in step S20, the currently stored flag is read from the memory (RAM) in step S21, and it is determined whether this flag indicates forward playback or backward playback. Determine if there is. (Step S22, 523)
.

In step S22, if the flag indicates forward playback, the process moves to step 826, where the flag is cleared and the apparatus is then switched to the reverse playback state.

As a result, the device continuously performs forward playback and reverse playback. Then, the next time a tape end detection signal is obtained, the apparatus is stopped.

On the other hand, if the flag indicates reverse playback in step S23, the process moves to step S24, the flag is cleared, and then the apparatus is switched to the forward playback state (step 525).

As a result, the device continues to perform backward playback and forward playback. Then, when a tape end detection signal is obtained, the device is stopped (steps 828, 529).
.

As described above, even if the device of the present invention starts from reverse playback, if the reciprocating drive mode is set, the device can be completely controlled to the forward playback state by referring to the flag. Enables reverse playback. Although the above description has been made regarding the reproducing operation, similar effects can be obtained with respect to the recording operation.

FIG. 3 shows another embodiment of the present invention, in which reciprocating reproduction is performed a specified number of times A instead of stopping after reciprocating.

When the system control unit 400 detects that the reciprocating drive mode is set (step 541), it determines whether the reciprocating number A is set in the presettable down counter (step 542).

The number of round trips A is, for example, a numeric keypad human board (not shown).
Alternatively, the number of presses of a single dedicated switch is stored in a register.

In the next step S43, it is determined whether forward or reverse is specified, and if forward is specified, the device is placed in a forward playback state until a tape end detection signal is input. wait. When the tape end detection signal is input (step 545), a clock is input to the presettable counter, that is, A=n-1 is calculated (step 846), and it is determined whether A=0 or not in step S47. . If A+0, it means that the specified number of repetitions of reproduction has not been performed, so the process moves to step S61 and the apparatus is put into a backward reproduction state. If it is A-0 in step S47, the process moves to step 848, puts the device in a reverse playback state, and waits until the next tape end detection signal is input. Then, when the tape end detection signal is input, the apparatus is stopped (step 550).

If reverse playback is specified in step S43, the apparatus is placed in a reverse playback state and waits until a tape end detection signal is input (step 551). When the tape end detection signal is input, in step S52, A=n-1 is calculated in the same way as before, and step S52 is performed.
In step 53, it is determined whether A=0 or not. If A=-, O, the process moves to step S62, the apparatus is made a forward playback apparatus, and the process moves to step S45. If A=O, the process moves to step S55, puts the device in a forward playback state, and
Wait until the next tape end detection signal is input. When the tape end detection signal is input, the apparatus is stopped (step 856).

[Effects of the Invention] As explained below, in this invention, regardless of whether tape feeding is started from the forward direction or the reverse direction, when the reciprocating drive mode is set, one reciprocating operation is always performed. It is possible to provide a tape control circuit for a magnetic recording/reproducing device that enables tape drive.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram for explaining one embodiment of the present invention,
FIG. 2 is a diagram showing the configuration of a control circuit according to the present invention, FIG. 3 is an explanatory diagram showing another embodiment of the invention, and FIG. 4 is an explanatory diagram of a conventional tape control circuit. 100...Mode setting section, 200...Operation section, 30
0... Switch output circuit, 400... System control unit, 500... Drive circuit, 501... Reel motor, 502... Capstan motor, 503...
Pufnonya〇Applicant's agent Patent attorney Takehiko Suzue-13= Figure 4

Claims (1)

[Claims] In a magnetic recording and reproducing device that can drive a tape in either the forward direction or the reverse direction and can record signals on the tape or reproduce recorded signals on the tape, the tape is reciprocated with respect to the magnetic recording and reproducing device. a mode setting means for setting a drive mode; an operating means for selectively specifying forward or reverse forwarding of the tape with respect to the magnetic recording/reproducing apparatus; when the reciprocating drive mode is set by the mode setting means, determining means for determining whether the direction specified by the operation signal is an outbound trip or a return trip; a first switching means that sets the tape drive direction of the magnetic recording/reproducing device as an outward path and switches the tape drive direction to a backward direction when a tape end detection signal is input; , a second switching means that sets the tape driving direction of the magnetic recording/reproducing device as a backward path, and switches the tape driving direction to an outgoing path when a tape end detection signal is input; 1. A tape control circuit for a magnetic recording/reproducing apparatus, comprising: a stop means for stopping tape drive when a tape end detection signal is input while the tape is being driven in the forward direction by the switching means.