JPS62184645A - Tape recorder - Google Patents

Abstract

PURPOSE:To attain the blank skip function by a microcomputer with a few program capacity by controlling the mechanism into a desired state through the logical processing by a logic circuit when the tape comes to its end at the fast forward running state. CONSTITUTION:A blank skip start signal is outputted to a logic circuit 7 from a blank part discriminating means 6 when an interblock 1 continues for a prescribed time and the mechanism is brought into the fast forward running state B.S. The tape 5 in the fast forward running state B.S approaches its end, reel stand stop information from a reel stand turning detector 11 is inputted to a tape end discriminating means 12 and tape end information is outputted to the logic circuit 7. The logic circuit 7 compares the tape end information with the content of a mechanism state storage means 13 and applies logical processing and outputs a plunger attracting signal, a reproduction plunger 14 is attracted to bring the mechanism into a constant speed reproducing state P.B. Then the plunger attracting signal is outputted again to invert the running direction of the mechanism from the side A into the side B, and the constant speed reproducing state P.B is brought from the start of the side B to reproduce a recording part 2 of the side B quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) According to the present invention, when a no-signal portion of a tape in a constant speed playback state continues for a certain period of time, the tape automatically enters a fast forward running state.

The present invention relates to a tape recorder equipped with an auto-reverse mechanism that reverses the running direction of the tape to enter a constant-speed playback state when the end of the tape is reached in the fast-forward running state, and a control circuit thereof.

(Prior Art) In recent years, the number of tape recorders equipped with an auto-reverse type cassette mechanism (hereinafter abbreviated as "mechanism") has increased, and the A of cassette tape (hereinafter abbreviated as "tape")
Continuous playback from side B to side B or from side B to side A is now possible, but the non-signal portion of the tape also runs at a constant speed and takes time to play back the next signal portion. An increasing number of auto-reverse tape recorders are equipped with a function to run sections in fast forward mode (hereinafter abbreviated as blank skip).

Blank skipping in a conventional auto-reverse tape recorder will be explained with reference to FIG.

FIG. 3 shows a plan view of the tape end for explaining the blank skip operation of a conventional auto-reverse type tape recorder. The recorded tape has a no-signal section 1 near the end of side A.
Generally, when the no-signal part 1 is detected, the tape is fast-forwarded B and S, and when the end of the tape is reached, the running direction of the tape is reversed and side B is fast-forwarded B and S, and the signal part is moved. When the head of the recording section 2 is detected, constant speed playback states P and B are set. The same applies when the tape is reversed from the B side to the A side.

(Problems to be Solved by the Invention) In the conventional configuration, a microcomputer is used for control in order to reverse the running direction of the tape in the fast forward running state at the end of the tape and return to the fast forward running state. Therefore, there is a problem in that the capacity of the ROM that stores the control program increases, leading to an increase in cost.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention detects a no-signal portion in a reproduction signal from a reproduction head of a mechanism section, and determines whether the no-signal portion continues for a certain period of time. comprising means for determining and outputting it to a logic circuit, and means for detecting the rotation of the reel stand and determining the end of the tape, and the logic circuit performs logical processing when the end of the tape is reached during fast forward running, By controlling the mechanism to a desired state, an auto-reversing tape recorder is provided which enables a blank skip function with a microcomputer with a small program capacity.

(Function) According to the above configuration, it is determined from the playback signal from the playback head of the mechanism that a no-signal portion has continued for a certain period of time, and the tape is changed from a constant speed playback state to a fast forward running state, and the fast forward running state is changed. When the end of the tape is reached in this state, the fast forward state is changed to a constant speed playback state, the running direction of the tape is reversed, and the next recording can be played back.

(Example) Blank skipping of the auto-reversing tape recorder of the present invention will be explained with reference to FIGS. 1 and 2. FIG. 1 is a block diagram for performing a blank skip operation in an embodiment of an auto-reverse type tape recorder of the present invention, and FIG. 2 is a plan view of a tape end for explaining the blank skip operation.

In FIG. 1, when the mechanism is in the constant speed reproduction state of side A, the reproduction signal from the reproduction head 3 is input to the no-signal discrimination means 4, and the recording section 2 determines whether the tape 5 is in the no-signal section 1 or not.
When it is determined that the tape 5 is the no-signal section 1, the output of the no-signal discriminating means 4 is input to the blank section discriminating means 6. When the no-signal section 1 continues for a certain period of time, a blank skip start signal is outputted from the blank section discriminating means 6 to the logic circuit 7, processed by the logic circuit 7, and sucks the fast forward plunger 9 through the plunger drive device 8. The mechanism is put into fast forward running states B and S. Further, the blank skip ○N10 FF switch 10 selects whether or not to output a blank skip start signal from the blank portion discriminating means 6. When the tape 5, which is determined to be the no-signal section 1 and is in the fast forward running state B or S, approaches the end, reel stand stop information is input from the reel stand rotation detector 11 to the tape end discriminating means 12, After a certain period of seconds, tape end information is outputted from the tape end determination means 12 to the logic circuit 7. The logic circuit 7 performs logical processing by comparing the tape end information with the contents of the mechanism state storage means 13, outputs a plunger suction signal, and suctions the playback plunger 14 through the plunger drive device 8, thereby causing the mechanism to operate. After setting the constant speed regeneration states P and B, output the plunger suction signal again to reverse the running direction of the mechanism from the A side to the B side, and set the constant speed regeneration state P and B from the beginning of the B side. To quickly reproduce the recording section 2 of the surface. Generally speaking, as shown in Figure 2, on a recorded tape, the recording part 2 is recorded from the beginning of the tape surface, and the end part of the tape surface is the no-signal part 1, so as mentioned above, Detects no-signal part 1 and sets fast-forward running state B, S to constant-speed playback state 7IP at the end of the tape
, B, and then reverse the running direction using an auto-reverse system, the recording section 2 at the beginning of the other side of the tape can be quickly played back, so the simple control of the present invention can provide the same functions as conventional ones. can get. In addition, in Figure 1, 15
16 is a motor, 17 is recording head determining means, and 18 is an operation command switch.

(Effects of the Invention) According to the present invention, a non-signal portion on one side of an auto-reverse tape is detected and the tape is put into a fast forward running state,
At the end of the tape, a microcontroller performs control to reduce the unnecessary time for reproducing the no-signal portion in an operation in which the tape is placed in a constant speed reproduction state and then the running direction is reversed to quickly reproduce the curved portion on the other side. Since the number of control programs 11 of the computer can be reduced, there is an effect that costs can be reduced by reducing the amount of ROM of the microcomputer.

[Brief explanation of drawings]

FIG. 1 is a block diagram for performing blank skip in an embodiment of the auto-reverse tape recorder of the present invention, FIG. 2 is a plan view of the end of the tape for explaining the blank skip operation, and FIG. 3 is a conventional tape recorder. FIG. 3 is a plan view of the tape end for explaining the blank skip operation of FIG. DESCRIPTION OF SYMBOLS 1... No-signal part, 2... Recording part, 3... Playback head, 4... No-signal discrimination means, 5... Tape, 6... Blank part discrimination means, 7°... logic circuit; 8... plunger drive device; 9... Rapid forward plunger, 10... Blank skip 0N10 FF switch, 11... Reel stand rotation detector, 12... Tape end determination means, 13.
...Mechanism state storage means, 14.. Regeneration plunger, 15.. Motor drive device, 16.. Motor, 17.. Recording head determination means, 18.. Operation command switch. Patent applicant Matsushita Electric Industrial Co., Ltd. 11'14

Claims (1)

[Claims] In an auto-reverse type tape recorder that is driven using the suction of a plunger and the rotation of a motor, there is provided a no-signal determining means for determining whether a running tape has no signal, and a signal from the no-signal determining means. blank section discriminating means for determining that the no signal has continued for a certain period of time and outputting a control signal to put the tape in a fast forward running state; recording head determining means for determining whether the tape is in a constant speed playback state and outputting a control signal to put the tape into a constant speed playback state; tape end determining means for determining the end of the tape by detecting the rotation of a reel stand; and the blank section. Control signals and operation commands such as playback, stop, and fast forward are input from the discrimination means, recording head discrimination means, and tape end discrimination means, and are compared with the contents of the mechanism section state storage means that stores the state of the mechanism section, and logical processing is performed. a logic circuit that controls the operation of the mechanism section through a plunger drive device and a motor drive device; and a logic circuit that selects whether to change the tape from a constant speed running state to a fast forward running state when no signal from the tape continues for a certain period of time. It is equipped with a blank skip ON/OFF switch, and when there is no tape signal for a certain period of time, it enters a fast forward running state, and when the end of the tape is reached, the fast forward running state changes to a constant speed running state, and the tape running is reversed. A tape recorder characterized by: