JPS592985B2 - 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 signal recorded on the magnetic tape.

During recording, for example, a positioning signal 5 is recorded at the beginning of a certain sentence, and during playback, the magnetic tape is fed at high speed, and when the positioning signal is detected during this high-speed running, the magnetic tape automatically stops, for example. With this configuration, the operation for searching for a signal recording position of a sentence or the like is significantly simplified.

Tape recorders that control the running motion of a 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 these 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 speeds of the take-up reel shaft 1 and the supply reel shaft 2, and 5 is a rotation detector that outputs signals obtained from the rotation detectors 3 and 4, respectively. This is a tape position detection circuit that compares and outputs a signal indicating the position of the magnetic tape.

Reference numeral 6 indicates a magnetic head for reproducing the positioning signal recorded on the magnetic tape, and □ indicates positioning signal detection consisting of a filter circuit, etc., 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 1U 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 corresponds to 30 seconds of magnetic tape. It turns out. Al, A2 to A6O are AND circuits which input the output signals from the tape position detection circuit 5 and the positioning signal detection circuit 7, and Bl, 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 the level is inverted from the low (low) level to the H (high) level, outputs an H level signal, and holds that state until it is set again. Cl,C
2 to C6O are AND circuits that receive output signals from the holding circuits Bl, B2 to B6O and the tape position detection circuit 5, and Dl and D2 to D6O are AND circuits Cl, C2 to C.
This blinking circuit is in an operating state while an H level signal is applied from 6O, and alternately outputs an H level signal and an L level signal. El, E2 to E6O are the holding circuits Bl, B2 to B6O and blinking circuits Dl, D2 to D6O.
An exclusive 0R circuit that receives the output signal from Fl, F
2 to F6O are exclusive 0R circuits that receive output signals from the exclusive 0R circuits El, E2 to E6O and the tape position detection circuit 5, and the corresponding display elements Gl and G2
It has the function of controlling the display operation of ~G6O. Also, the AND circuits Al, A2 to A of the tape position detection circuit 5
From the output terminals Sl, S2 to S6O connected to 6O and Cl, C2 to C6O, only the output signal of the output terminal instructing the tape position becomes H level, and the exclusive 0R
Output terminal Tl connected to circuit Fl, F2 to F6O
, T2 to T6O, 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. Then the third
The driving relationship will be explained with reference to the drawings.

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 5 which causes the rewind plunger 13 to perform a suction operation and puts the tape recorder into a rewind operation state; 14 is a tape end detection circuit which detects the end of the tape; when the end of the tape is detected, the tape recorder enters the rewind operation state; This has the effect of putting the rewinding drive circuit 12 into a non-operating state 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 rewinding drive circuit 12 becomes operational and drives the rewinding plunger 13. As a result, the tape recorder enters a rewinding state and the magnetic tape is rewound. During this rewinding, the tape position detection circuit 5 compares the signals obtained from the rotation detectors 3 and 4 to indicate the position of the tape. Outputs a signal and also uses a positioning signal detection circuit 7
performs the operation of detecting the positioning signal recorded on the magnetic tape. FIG. 4A shows a state in the middle of rewinding, and in this state, the output terminal Sl of the tape position detection circuit 5 is
, S2 to S6O, only the output of the output terminal Sll is at H level, and the output terminal T of the output terminals TlT2 to T6O is set to H level.
The output signals of T1, T2 to Tll are at H level, and the output of positioning signal detection circuit 7 is at L level. Therefore, in this state, the outputs of AND circuits Al, A2 to A6O are all L.
The holding circuits B1, B2 to B6O are in a non-operating state, and all of their outputs are at the L level. Therefore, the outputs of the AND circuits Cl, C2-C6O which receive the outputs of the holding circuits B1, B2-B6O are all at the L level, and the blinking circuits D1, D2-D6O are all inactive. Therefore, the holding circuits Bl, B2 to B6O and the blinking circuits Dl,
Exclusive 0R circuit E that uses human power to output signals from D2 to D6O
The output signals of E2 to E6O are all at L level. In addition, the output terminals Tl, T2 to Tll of the tape position detection circuit 5
Since the output of is at H level, the exclusive 0R circuit Fl, F2
An H level signal appears at the output terminal of ~Fll. Therefore, the display elements Gl, G2-Gll corresponding to the exclusive 0R circuits Fl, F2-Fll are in operation. In this case, the position of the magnetic tape is 30 seconds x 11 pieces, or 5 minutes 3, from the starting edge.
The display indicates that the vehicle is at the position where the vehicle traveled for 0 seconds. As the rewinding of the magnetic tape progresses, the display elements Gll, GlO...
The positioning signal becomes inactive in the order of . A level signal is output. As a result, the levels of the input signals of AND circuit A9 corresponding to that position both become H level, and the output signal of AND circuit A9 is inverted from L level to H level. Therefore, the holding circuit B9 becomes active and its output, the H level signal, is transmitted to the exclusive 0R circuits E9 and A.
It is applied to the ND circuit C9. Since the H level signal is applied to the other input terminal of the AND circuit C9 by the output terminal S9 of the tape position detection circuit 5, the output signal of the AND circuit C9 becomes H level, and the blinking circuit D9 is in the operating state. become. As a result, the H level signal and L level signal which are the output signals of the flashing circuit D9 are alternately applied to the exclusive 0R circuit E9, and the H level signal and the L level signal are output from the exclusive 0R circuit E9. will be output alternately. Therefore, an H level signal and an L level signal alternately appear at the output terminal of the exclusive 0R circuit F9 to which the output signal of the exclusive 0R circuit E9 is applied.
Since H level signals are applied from the tape position detection circuit 5 to the input terminals F2 to F8, H level signals appear at their output terminals. Figure 4B
shows such a state, and the tape position and the position of the positioning signal are displayed on the display element G9 which is in a blinking state. FIG. 4C shows a state in which the tape has been rewound further. In this state, the input signal from the tape position detection circuit 5 to the AND circuit C9 becomes L level, so the output of the AND circuit C9 becomes L level and blinks. Circuit D9 is inactive. Therefore, an H level signal is output to the output terminal of the exclusive 0R circuit E9, and the exclusive 0R circuit to which this signal is input
The output signal of R circuit F9 becomes H level. Therefore, in such a state, display element G9 is kept in an active state to indicate the position of the positioning signal, and the position of the tape is displayed on display element G7, which is in an active state. FIG. 4D shows a state in which the magnetic tape has been rewound to the starting end, and in this state, only the display elements G3, G6, and G9, which indicate the position of the positioning signal, are kept in an operating state. Therefore, the user can easily know the location and number of recorded positioning signals. FIG. 4E shows a state in which the magnetic tape is run by playback or fast-forwarding after the position of the positioning signal has been detected by the aforementioned rewinding operation; in this case, the positioning signal is Detection is performed for driving control such as automatic stop, but not for position display.
As the magnetic tape is wound, the output terminals S1, S2 to S6O of the tape position detection circuit 5
The output level of the terminal that indicates the tape position in order is H.
level, and the outputs of the output terminals Tl, T2 to T6O are inverted from the L level to the H level from the output terminal T1. When the magnetic tape is wound and passes the position where the first positioning signal is recorded, the levels of the input signals of exclusive 0R circuit F3 both become H level, so its output is inverted from H level to L level. However, the display element G3 becomes inactive. Further, when the position of the tape matches the position where the positioning signal is recorded, the display element G6 becomes blinking as described above. Therefore, in FIG. 4E, the position of the tape is indicated by display element G6 in the flashing state, and the position of the positioning signal is indicated by display element G3 in the inactive state, display element G6 in the flashing state, and display element G6 in the active state. It is displayed on a certain display element G9. In this embodiment, the position of the positioning signal is displayed by the rewinding operation, but the position of the positioning signal can also be detected and displayed by the fast forwarding operation.

Further, although the number of display elements 10 is set to 60, it is not limited to this number, and may be C-45, C-90, etc. It is clear that when a force setting tape such as C-120 is used, the length of the magnetic tape corresponding to one display element is different than when using C-60. 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. Further, a liquid crystal, a light emitting diode, etc. can be used as a display element constituting the display device, and the table position can also be detected by detecting the rotation of only one of the take-up reel shaft or the supply reel shaft. As explained above, the present invention not only displays the position of the magnetic tape, but also displays the position of the positioning signal recorded on the magnetic tape. In addition, when the position of the tape matches the position of the positioning signal, the display element blinks to indicate the position of the tape and positioning signal. The position of the signal can be reliably confirmed, and the present invention has an extremely large effect when incorporated into a tape recorder having a function of controlling the running operation of the magnetic tape by detecting the positioning signal. It is something to play.

Also, a tape position detection circuit 5, a positioning signal detection circuit 7
, AND circuit Al, A2 to A6O, holding circuit Bl, B2
~B6O, AND circuit Cl, C2~C6O. Flashing circuit D
l, D2-D6O, exclusive 0R circuit El, E2-E6O
and Example W of the present invention configured with Fl, F2 to F6O
As shown, the present invention can be configured extremely simply by performing the arithmetic processing using 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. Explanation of main drawing numbers, 1-...Take-up reel shaft, 2.
... Supply reel shaft, 5 ... Tape position detection circuit, 7 ... Positioning signal detection circuit, 8 ...
...Display device, 9...Display board,''...
・Display element.

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. When input, the holding circuit enters the operating state and holds that state until it is reset, and when the output signal of the holding circuit in the operating state and the signal from the tape position detection circuit are input, the holding circuit enters the operating state during that time. It consists of a blinking circuit that outputs a blinking signal and a display board on which many display elements such as liquid crystal are arranged in parallel. The position of the positioning signal is determined by rendering 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. 1. A tape recorder characterized in that when the tape recorder is put into an operating state, the position of the tape is further displayed by causing the display element to blink when the position matches the display element.