JPS592984B2 - 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 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 is automatically stopped, for example. The operation for searching for the signal recording position of sentences etc. should be significantly simplified.

Tape recorders that control the running motion of a magnetic tape by detecting positioning signals have been commercialized, but in conventional devices, where on the magnetic tape are the positioning signals recorded? , 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. 0, 1 and 2 are the take-up reel shaft and supply reel shaft of the tape recorder. 3 and 4 are rotation detectors that output signals such as pulses corresponding to the rotational speeds of the take-up reel shaft 1 and the supply reel shaft 2, respectively; 5 is a ratio of 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.

6 is a magnetic head for reproducing positioning signals recorded on the magnetic tape; 7 is a filter circuit for detecting positioning signals from the signals reproduced by the magnetic head 6;
This is a positioning signal detection circuit consisting of 0, and is configured to output a signal when a positioning signal is detected.

8 is a display device that 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 positioning signal detection circuit 1! 5.

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 LU 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. A1 to A6O are AND circuits that receive the output signals from the tape position detection circuit 5 and the positioning signal detection circuit 7, and B1 to B6O are the AND circuits A.
This is a holding circuit that enters an operating state when the output signals of A1 to A6O are inverted from an L (low) level to an H (high) level, and maintains that state until it is reset. C1-C
6O is an exclusive 0R circuit which receives the output signals from the holding circuits B1 to B6O and the tape position detection circuit 5, and has the function of controlling the operation of the corresponding display elements D1 to D, O. . In addition, the above A of the tape position detection circuit 5
Output terminals S, ~ connected to ND circuits A1 to A6O
From S6O, only the output signal of the output terminal instructing the tape position becomes H level, and the exclusive 0R circuits C1 to C
The output terminals T1 to T6O connected to the tape 6O are configured so that the output signals of all the output terminals from the first output terminal T1 to the output terminal instructing the tape position become 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 in contact with 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 is put into operation and drives the rewinding plunger 13. As a result, the tape recorder enters a rewinding state and the magnetic tape is rewound. During rewinding, the tape position detection circuit 5 detects the rotation detector 3.
. FIG. 4A shows a state in the middle of rewinding, and in this state, the output terminals S1 to S6O of the tape position detection circuit 5 are
Only the output of the output terminal Sl5 among the output terminals T1 to T6O is at the H level, the output signals of the output terminals T1 to T15 of the output terminals T1 to T6O are at the H level, and the output of the positioning signal detection circuit 7 is at the L level. Therefore, in this state, AND circuit A1~
The outputs of A6O are all at L level, and the holding circuits B1 to B,
O is in a non-operating state, and all its outputs are at L level. Since the outputs of the output terminals T1 to Tl5 of the tape position detection circuit 5 are at the H level, the outputs of the exclusive 0R circuits C1 to Cl5 are at the H level, and the corresponding display elements D1 to Cl5 are at the H level.
Dl5 becomes active. In this case, the display indicates that the position of the magnetic tape is 30 seconds Xl5 times, that is, 7 minutes and 30 seconds after the beginning. As the rewinding of the magnetic tape progresses, the display elements Dl5, Dl4, etc. become inactive in that order, but the positioning signal recorded on the magnetic tape is reproduced by the magnetic head 6. Then, the positioning signal detection circuit 7 outputs an H level signal. SoQ
As a result, the levels of the input signals of the AND circuit Al4 corresponding to that position both become H, and the output signal of the AND circuit Al4 becomes L.
The level is reversed to H level. Therefore, holding circuit Bl4
is in an operating state, and its output, an H level signal, is applied to the input terminal of exclusive 0R circuit Cl4. Therefore, the magnetic tape is rewound and the exclusive 0R circuit Cl4
When the signal from the tape position detection circuit 5 applied to the other input terminal of is inverted from the H level to the L level, the output of the exclusive 0R circuit Cl4 goes to the H level and the display element Dl4 is maintained in the operating state. It turns out. FIG. 4B shows such a state, and even though the tape position is displayed on display elements D1 to Dll, the position of the positioning signal is displayed on display element Dl4. . FIG. 4C shows a state in which the magnetic tape has been rewound to the starting end, and in this state, only the display elements D5, DlO, and Dl4, 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. 4D shows a state in which the position of the positioning signal is detected by the aforementioned rewinding operation, and then the magnetic tape is run by the playback or fast forwarding operation. Detection of the output signal is performed for driving control such as automatic stop, but not for position display. As the magnetic tape is wound, the outputs of the output terminals T1 to T6O of the tape position detection circuit 5 are sequentially inverted from the L level to the H level from the output terminal T1, and the tape position is displayed on the display elements D1 to D6.
However, when the first positioning signal is recorded, the input levels of the exclusive 0R circuit C5 both become H level, so the output is inverted from H to L, and the display element D5 becomes Becomes inactive. Therefore, in FIG. 4D, the position of the tape is indicated by display elements D1 to Dl2, and the position of the positioning signal is indicated by display element D5 which is in the non-operating state.
, DlO and the display element D, 4 in the operating state will display. 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. A liquid crystal, a light emitting diode, or the like can be used as a display element constituting the display device. As explained above, the present invention displays the tape position by activating the display elements from the display element at the starting point to the display element indicating the tape position, and the position of the positioning signal indicates the tape position. The display element is characterized in that the display element is placed in an inactive state within the display element that displays the position of the tape, and the display element is placed in an active state outside the display element that displays the position of the tape. By doing so, not only the position of the positioning signal but also the number thereof can be recognized very easily.

Therefore, the present invention is extremely effective when incorporated into a tape recorder configured to control 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 A1 to A6O, and the holding circuits B1 to
Although the embodiment of the present invention has been shown in which the B6O and the exclusive 0R circuits C1 to C6O are used, the present invention can be constructed very easily if the arithmetic processing is performed by a single microcomputer.

[Brief explanation of the drawing]

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 device. It is a figure showing the display state of a display part.

Claims (1)

[Claims] 1. In a tape recorder equipped with a function to control the running operation of a magnetic tape by detecting a positioning signal recorded on the magnetic tape, the magnetic tape is controlled by detecting the rotation of the take-up reel shaft and supply reel shaft It consists of a tape position detection circuit that outputs a signal indicating the tape position, a positioning signal detection circuit that detects the positioning signal, and a display board on which many display elements such as liquid crystals are arranged in parallel. is displayed by activating the display elements from the display element at the starting point to the display element indicating the tape position, and the position of the positioning signal is determined by activating the display elements from the display element at the starting point to the display element indicating the tape position. 1. A tape recorder characterized in that the position of the tape is displayed by activating a display element other than the display element that displays the position of the tape.