JPS6292259A - Tape recorder - Google Patents

Abstract

PURPOSE:To obtain recording/reproducing functions in the forward/reverse directions with simple constitution by changing over the drive direction of a capstan shaft and a couple of pinch rollers to change over the running direction of a tape. CONSTITUTION:A forward reproducing head 12 is on the 1st head base 13 and the head 12 is turned around a rotary shaft 16 by allowing the 1st head base 13 to depress the forward play button thereby bringing the head 12 in contact with the tape or separating it from the tape. A reverse reproducing head 14 is on the 2nd base 15 and the head 14 is brought into contact with or separated from the tape by operating the reverse play button. In the reverse reproducing state, a reel 8 and a pinch roller 2a are driven in the direction of the arrow to run the tape, only the head 14 is brought into contact with the face of tape, and in the forward reproducing state, the reel 4 and the pinch roller 2a are driven in a prescribed direction to run the tape, only the head 12 is brought into contact with the face of tape so as to counteract against the spring force of a pad and the head 14 is disconnected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape recorder in which a pair of pinch rollers and a capstan shaft run a tape at a constant speed in a forward and reverse direction, and in particular, the present invention relates to a tape recorder that runs a tape at a constant speed in a forward and reverse direction within a tape cassette. The invention relates to a tape recorder having a separate magnetic head that comes into contact with the tape only occasionally.

BACKGROUND OF THE INVENTION In recent years, efforts have been made to make tape recorders smaller and lighter in order to make them more portable, and at the same time, tape recorders with a reverse function are becoming more prominent.

Generally, a tape recorder with a reverse function has two pairs of pinch rollers and a capstan shaft.

An example of a conventional tape recorder with a reverse function will be described below with reference to the drawings. Figure 4 (7) is a top view of the main parts during forward rotation, and Figure 4 (A) is a top view of the main parts during reverse rotation.
b is the capstan shaft, 2a, 2b are pinch rollers, 3a
, 3b are flywheels. The switching gear 6 meshes with one of the winding gears 6 and 9 by the slip pulley 7, and the winding wheels 4 and 8 begin to rotate. Figure 4 (7)
In the case of normal rotation recording/reproduction shown in FIG. 1, the first take-up wheel 4 rotates, the first capstan shaft 1& and the first pinch roller 2& come into contact with each other, and the tape is driven. In the case of reversal as shown in FIG. 4(A), the second take-up wheel 8 rotates, and the 20th capstan shaft 1b and the second pinch roller 2b come into contact with each other, thereby driving the tape. In other words, by rotating each capstan shaft in a fixed direction and in a relatively opposite direction, and by bringing the pinch rollers into contact with the corresponding capstan shafts independently, the tape can be played back or played while recording. The direction of rotation was switched between the normal rotation direction and the reverse rotation direction.

Problems to be Solved by the Invention However, according to this method, the structure is more complicated than that of a cassette tape recorder that has a playback or recording function only in the forward direction. From this point of view, there are many problems.

One way to solve these conventional problems is to
It is conceivable to provide a pair of pinch rollers and a capstan shaft, and to switch the rotation direction of the capstan shaft so that at least the reproduction of the tape can be switched between the normal rotation direction and the reverse rotation direction. However, in the reverse direction, this method does not have the pinch rollers and capstans that were present in conventional methods, so it is not possible to obtain the driving force for pulling out the tape from these, and a considerably larger winding torque is required than in the forward direction. It is known that Furthermore, in the reverse direction, the pair of pinch rollers on the forward rotation side and the capstan collar tape are fed out, so the farther the tape travels from the pinch rollers, the more unstable the tape travel becomes. There were problems with this.

The present invention solves these problems and provides a tape recorder with a simple configuration that enables recording and reproduction during forward and reverse rotation, and also eliminates the problem of tape running.

Means for Solving the Problems In order to solve the above problems, the tape recorder of the present invention is equipped with a pair of pinch rollers and a capstan shaft, and by switching the direction of rotation of the capstan shaft, the tape recorder can be operated at constant speed. There is no K to switch the running direction of the tape, and there are two magnetic heads that touch the tape inside the tape cassette.
One of the magnetic heads is inserted through different opening windows during normal rotation and reverse rotation.

Function 1 The tape recorder of the present invention can change the running direction of the tape by changing the direction of rotational force using only a pair of nopia rollers and a capstan shaft, so it can realize forward and reverse recording and playback functions with a simple configuration. can do. In addition, when running in the normal direction, the head configuration is the same in the tape cassette that has the conventional Norihaas function, but when running in the reverse direction, the magnetic head is inserted into the same opening window in the tape cassette along with the pinch roller, so the head configuration inside the tape cassette is Since there is no tape pressing load resistance due to the bat pressure from the felt bat in the central opening of the tape, there is no need to set the winding torque particularly high during reverse running compared to normal running, and the tape is fed out by the pinch roller. By setting the magnetic head immediately after the recording, stable tape running can be obtained on the head surface, and there is little effect on signal recording and reproduction.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIGS. 1 and 2 are top views of the tape recorder of this embodiment, showing the reverse playback state and the forward playback state, respectively. Here, the forward rotation reproducing head 12 is connected to the first head substrate 13.
By operating a forward play button (not shown), the first head substrate 13 rotates about the rotation shaft 16 as a fulcrum to bring the head 12 into contact with or away from the tape. The reversing playback head 14 is located on the second head substrate 15, and the head 14 is brought into contact with or separated from the tape by operating a reversing play button (not shown).

Therefore, in the reverse playback state as shown in FIG. 1, the reel 8 and pinch roller 2a rotate in the direction of the arrow in the figure to run the tape, and only the head 14 is in contact with the tape surface.

Figure 2 shows normal rotation playback, which is exactly the same as the conventional configuration; the reel 4 and pinch roller 22L rotate in the direction of the arrow in the figure to run the tape, and only the head 12 is affected by the spring force of the pad. The head 14 comes into contact with the tape surface in an opposing manner.
are spaced apart. In such a head arrangement, the correspondence relationship with the tape cassette is as shown in FIG. 3. In the normal playback state, the head 12 enters the central opening window 18, and in the reverse playback state, the head 14 enters the opening window 17 together with the pinch roller 2a. It is.

Effects of the Invention As described above, the tape recorder of the present invention has a simple configuration with only a pair of pinch rollers and a capstan, since the running direction of the tape is switched by switching the rotational force direction of a pair of capstan shafts and a pinch roller. You can obtain recording and playback functions in the forward and reverse directions. Also, when playing in the forward direction, the configuration is exactly the same as the conventional one, but when playing in the reverse direction, the magnetic head is inserted into the same opening window as the pinch roller.
Since the pressure on the magnetic head by the butt in the central opening window in the tape cassette is eliminated, there is no need to increase the winding torque of the take-up reel stand during reversal compared to the forward rotation, and the drive The power consumption required for this can be reduced. Furthermore, since the head is disposed immediately after the pinch roller and the capstan shaft during reproduction in the reverse direction, the head can be brought into contact with the tape before the tape travels away from the pinch roller and becomes unstable.

In this example, when reproducing in the reverse force direction, the magnetic head and the pinch roller were inserted into the opening window of the tape cassette into which the pinch roller enters, but when the pinch roller diameter is increased, the magnetic head is inserted between the central opening window and the opening window on both sides. It may be inserted into the open window 19 located between the open windows.

[Brief explanation of drawings]

FIG. 1 is a top view showing the reverse playback state of the tape recorder in an embodiment of the present invention, FIG. 2 is a top view showing the normal playback state of the tape recorder, and FIGS. 3(7) and (a) are The top view and bottom front view of the tape cassette, FIG. 4 shows a conventional tape recorder with a reverse function, (7)
is a top view during forward rotation, and (A) is a top view during reverse rotation. 1a... Capstan shaft, 2a...'
Pinch roller, 4...First take-up reel, 8...
...Second take-up reel, 1Q...Magnetic head, 11...Tape cassette, 12...
・Forward playback ~, Do, 1319091. First head board, 14...Reproduction head for reversal, 15...
...Second head board. Name of agent: Patent attorney Toshio Nakao 1 person ft
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Claims (1)

[Claims] It is equipped with a pair of pinch rollers and a capstan, and by switching the rotating direction of the capstan shaft, the tape running direction during constant speed running can be switched between a forward direction and a reverse direction. A magnetic head is inserted into the central opening window of the tape cassette, and when traveling in the reverse direction, a second magnetic head is inserted into the opening window between the first magnetic head and the pinch roller and brought into contact with the tape. A tape recorder featuring: