JPS592986B2 - tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder having a function of controlling the running operation of a magnetic tape by detecting a positioning 10 signal recorded on the magnetic tape.

During recording, for example, a positioning signal is recorded at the beginning of a certain sentence, and during playback, the magnetic tape is fed 15 times at high speed, and when the positioning signal is detected during this high-speed running, the magnetic tape automatically stops. This greatly simplifies the operation for locating the signal recording position of text, etc.

Tape recorders that control the running motion of the magnetic tape by detecting positioning signals have been commercialized, but where on the magnetic tape is the positioning signal recorded in conventional devices? , and I was unable to recognize the number. The present invention has been made in view of the above points, and will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention, in which numerals 1 and 2 are a take-up reel shaft and a supply reel shaft of a tape recorder. 3 and 4 are rotation detectors that output signals such as pulses corresponding to the rotation speed of the take-up reel shaft 1 and the supply reel shaft 2, respectively, and 5 compares the signals obtained from the rotation detectors 3 and 4. This is a tape position detection circuit that outputs a signal indicating the position of the magnetic tape.

Reference numeral 6 denotes a magnetic head for reproducing the positioning signal recorded on the magnetic tape, and 7 a positioning signal detection device comprising a filter circuit and the like for detecting the positioning signal from among the signals reproduced by the magnetic head 6. The circuit is configured to output a signal when a positioning signal is detected.

A display device 8 displays the tape position and the position of the positioning signal in accordance with the output signals from the tape position detection circuit 5 and the positioning signal detection circuit 7.

Next, such a display device will be explained with reference to FIG.

Reference numeral 9 denotes a display board, on which a large number of display elements VP such as liquid crystals are arranged in parallel as shown.

If the number of such display elements 10 is 60 and a C-60 force setting tape, that is, a tape of 30 minutes on one side, is used, the display length of one display element 10 is equivalent to 30 seconds of magnetic tape. become. Al, A2 to A6O are AND circuits which input the output signals from the tape position detection circuit 5 and positioning signal detection circuit 7, and B, , B2 to B6O are the AND circuits in which the output signals of the AND circuits Al, A2 to A6O are L. It is a holding circuit that enters an operating state when it is inverted from a (low) level to an H (high) level, outputs an H level signal, and holds that state until it is set again. Cl,C
Reference numerals 2 to C6O are blinking circuits which are in operation while an H level signal is applied from the tape position detection circuit 5 and alternately output an H level signal and an L level signal. Dl, D2-D6O are the holding circuits Bl, B2-B6
Exclusive 0R circuits El, E2 to E6O receive output signals from the exclusive 0R circuits Dl, D2 to D6O and the tape position detection circuit 5, and receive output signals from the exclusive 0R circuits Dl, D2 to D6O and the tape position detection circuit 5. This is an exclusive 0R circuit for input, and has the function of controlling the operation of the corresponding display elements Fl, F2 to F6O. Also, the AND circuits Al, A2 to A6O and the blinking circuits C, , of the tape position detection circuit 5,
Output terminals Sl, S2-S connected to C2-C6O
From 6O onwards, only the output signal of the output terminal instructing the tape position becomes H level, and the exclusive QR circuits El, E2
~ Output terminal Tl connected to E6O, T2 ~ T6O
From then on, the output signals of all the output terminals from the first output terminal T1 to the output terminal instructing the tape position are set to H level. Next, the driving relationship will be explained with reference to FIG.

11 is a switch that is closed when detecting the position of the positioning signal recorded on the magnetic tape and displaying the position on the display device; 12 is activated when the switch 11 is closed; A rewind drive circuit causes the rewind plunger 13 to perform a suction operation to put the tape recorder into a rewind operation state, and 14 is a tape end detection circuit that detects the end of the tape. , has the effect of making the rewind drive circuit 12 inactive and stopping the tape recorder.

In this rewinding state, the magnetic head 6 is configured to contact the magnetic tape. Next, the operation of the display device will be explained with reference to FIG. When the switch 11 is closed after the force setting tape is installed at the playing position, the rewind drive circuit 12 is activated and the rewind plunger 1 is activated.
Drive 3 to 1. As a result, the tape recorder enters a rewinding state and the magnetic tape is rewound. During rewinding, the tape position detection circuit 5 compares the signals obtained from the rotation detectors 3 and 4 and generates a signal indicating the position of the tape. In addition, the positioning signal detection circuit 7 performs a detection operation of the positioning signal recorded on the magnetic tape. FIG. 4A shows a state in the middle of rewinding. In this state, only the output of the output terminal Sl4 among the output terminals Sl, S2 to S6O of the tape position detection circuit 5 is at H level, and the output terminal TI is at H level. Output terminal Tl2T2゜Tl4 in circuit T2ゝT6O
The output signal of the positioning signal detection circuit 7 is at the H level, and the output of the positioning signal detection circuit 7 is at the L level. Therefore, in this state, AND
The outputs of circuits Al, A, -A6O are all at L level, and holding circuits B1, B2 - B6O are in a non-operating state, and all their outputs are at L level. In addition, since the blinking circuit Cl4 connected to the output terminals S and 4 is in the operating state, it is exclusively 0.
An H level signal and an L level signal are alternately output to the output terminals of the R circuits D and 4. Since the output terminals Tl, T2 to T, 4 of the tape position detection circuit 5 are at H level, the output terminals of the exclusive 0R circuits E1 to El3 are at H level.
level signal power (H level signal and L level signal appear alternately at the output terminal of exclusive 0R circuit El4. Then, display element F corresponding to exclusive 0R circuit E, ~ El3
1 to Fl3 are in the operating state, and the display element Fl4 corresponding to the exclusive 0R circuit El4 is in the blinking state. In this case, the display indicates that the position of the magnetic tape is 30 seconds x 14 times, that is, 7 minutes from the starting end. As the rewinding of the magnetic tape progresses, the display element Fl4, which was in a blinking state, becomes inactive, and the display element Fl3, which was in an operating state, changes to a blinking state, but the positioning signal recorded on the magnetic tape changes to the magnetic head. When the signal is reproduced at step 6, the positioning signal detection circuit 7 outputs an H level signal. As a result, the levels of the input signals of the AND circuit Al2 corresponding to that position both become H, and the output signal of the AND circuit Al2 is inverted from the L level to the H level. Therefore, the holding circuit Bl2 becomes active, and the H level signal that is its output is applied to the input terminal of the exclusive 0R circuit Dl2, and accordingly, the H level signal that is the output of the exclusive 0R circuit Dl2 becomes exclusive. Target 0
It is applied to the human power terminal of the R circuit El2. Therefore, when the magnetic tape is rewound and the signal from the tape position detection circuit 5 applied to one input terminal of the exclusive 0R circuit El2 is inverted from the H level to the L level, the exclusive 0R
The output of the R circuit El2 becomes H level, and the display element Fl2 is maintained in the operating state. FIG. 4B shows such a state, in which the position of the tape is displayed on display element F9 which is in a flashing state, and the position of the positioning signal is displayed on display element Fl2 which is in an operating state. FIG. 4C shows a state where the magnetic tape has been rewound to the starting end, and in this state, the display elements F4 and F indicating the position of the positioning signal are shown.
7, only Fl2 is kept in operation. Therefore, the user can easily know the location and number of recorded positioning signals. FIG. 4D shows a state in which the position of the positioning signal has been detected by the aforementioned rewinding operation, and then the magnetic tape is run by the playback or fast forwarding operation. Detection is performed for driving control such as automatic stopping, but not for position display. As the magnetic tape is wound, the output level of the terminals indicating the position of the tape sequentially becomes H level from the output terminal S1 from the output terminals S1, S2 to S6O of the tape position detection circuit 5, and the output terminals T1, T2 of the tape position detection circuit 5 turn to H level.
~The output of T6O goes from L level to H in order from output terminal T1.
Flip to level. Then, when the magnetic tape is wound and passes the position where the first positioning signal is recorded, both the human power levels of exclusive 0R circuit E4 become H level, so the output is inverted from H level to L level, and the display element F4
becomes inactive. Therefore, in FIG. 4D, the position of the tape is indicated by display elements F and O in the blinking state, and the position of the positioning signal is indicated by display elements F4 and F in the non-operating state.
7 and is displayed on the display element Fl2 which is in the operating state. In this embodiment, the position of the positioning signal is displayed by the rewind operation, but the position of the positioning signal can also be detected and displayed by the fast forward operation.

In addition, although the number of display elements 10 is set to 60, it is not limited to this number, and when using a force setting tape such as C-45, C-90, C-120, etc., the number of display elements 10 is 60. It is clear that the length of the magnetic tape corresponding to one display element changes. In this embodiment, a case has been described in which a positioning signal recorded on a magnetic tape is detected, but it can also be configured to detect a non-signal portion between sentences. Furthermore, a liquid crystal, a light emitting diode, etc. can be used as a display element constituting the display device, and the tape position can also be detected by detecting the rotation of only one reel shaft. As explained above, the present invention puts the display element that indicates the tape position in the blinking state, and also puts the display elements from the display element at the starting point to the display element immediately before the display element in the blinking state into the operating state. The position of the positioning signal is determined by making the display element inactive within the display element displaying the tape position, and by disabling the display element outside the display element displaying the tape position. This device is characterized by displaying information by activating the Depa display element, and by doing so, it is possible not only to quantitatively recognize the running distance of the magnetic tape, but also to The position of the positioning signal can be easily recognized.

Therefore, the present invention is extremely effective when incorporated into a tape recorder having a function of controlling the running operation of a magnetic tape by detecting a positioning signal. Also, the tape position detection circuit 5, the positioning signal detection circuit 7, the AND circuits Al, A2 to A6O, and the holding circuit Bl.
, B2-B6O, blinking circuit Cl, C2-C6O, exclusive 0R circuit Dl7D2ゝD6O and E1ra E2P'E6O
Although an embodiment of the present invention has been shown, the present invention can be constructed extremely simply if the arithmetic processing is performed by a single microcomputer.

[Brief explanation of drawings]

The drawings all relate to the present invention; FIG. 1 is a block diagram showing one embodiment, FIG. 2 is a block diagram showing one embodiment of the display device, FIG. 3 is an explanatory diagram of the operation, and FIG. 4 is a diagram showing the display unit. It is a figure which shows a display state.

Claims (1)

[Claims] 1. In a tape recorder equipped with a function of controlling the running operation of a magnetic tape by detecting a positioning signal recorded on the magnetic tape, detecting the rotation of the take-up reel shaft and the supply reel shaft or one of the reel shafts. a tape position detection circuit that outputs a signal indicating the position of the magnetic tape; a positioning signal detection circuit that detects the positioning signal; and signals from the tape position detection circuit and the positioning signal detection circuit. a holding circuit that enters an operating state when a signal from the tape position detection circuit is input and maintains that state until it is reset; a blinking circuit that enters an operating state and outputs a blinking signal when a signal from the tape position detection circuit is input; It consists of a display board with a large number of display elements arranged in parallel, and the display element indicating the position of the tape is set to a blinking state, and from the display element at the starting point to the display element immediately before the display element in the blinking state. The position of the tape is indicated by activating the display plate of the tape, and the position of the positioning signal is determined by making the display element inactive within the display element that indicates the tape position. A tape recorder characterized in that a position is displayed by activating a display element outside the display element for displaying the position.