JPS61110362A - Tape recorder - Google Patents

Abstract

PURPOSE:To obtain a reverse recording and reproducing function with simple constitution by changing rotating directions of a couple of capstans and a pinch roller and changing running directions of a tape. CONSTITUTION:A figures shows a reverse playback state wherein a head substrate 13 moves forth while a reel 8 serves as a take-up reel and a reel 4 serves as a payoff reel. At this time, the pad in a tape cassette is pressed in to a pad shifter 12, a magnetic head 12 is separated from the pad, and only the tape 17 abuts on the magnetic head 12. The run position of the tape 17 is controlled by a tape guide 14a provided to a pinch roller arm 14b in one body and the capstans 1 and pinch roller 2 are driven right before the guide to send out the tape. When the playback state is switched to the forward direction, the capstan 1a and pinch roller 2a are reversed and the reel 4 is used as the take-up side to easily obtain the same constitution as before.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape recorder that uses a pair of pinch rollers and a capstan shaft to record and play a tape in forward and reverse directions. The present invention relates to a tape recorder having a position control member.

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. For example, the specification of Patent Application No. 138813 filed in 1988 proposes a mechanism with the purpose of providing a tape recorder that has a reverse function, simplifies its configuration, and is small, lightweight, and thin, as described below. has been done.

A tape recorder with a general KIJ-verse function had two pairs of pinch rollers and a capstan.

An example of a conventional reverse tape recorder will be described below with reference to the drawings. FIG. 4(7) is a top view of the main part during normal rotation, and FIG. 4(A) is a top view of the main part during reverse rotation. 1a.

1b is a capstan, 2a, 2b are pinch rollers, 3a
, 3b is a flywheel. The slip pulley 7 causes the switching gear 6 to mesh with one of the take-up gears 6.9 and the take-up reel 4.8 begins to rotate. In the case of normal rotation recording and playback shown in (7), the first winding wheel 4 rotates and the first
capstan 1a.

The pinch rollers 2a of @1 come into contact with each other, and the tape is driven. In the case of reversal shown in (a), the second take-up reel rotates, and the second capstan 1b11! :The second pinch roller 2b comes into contact and the tape is driven. 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 playback or recording state of the tape can be changed in the normal rotation direction. It was designed to switch in the opposite direction.

Problems to be Solved by the Invention However, compared to conventional cassette tape recorders that only have forward-direction playback or recording functions, this system requires a more complex structure and is less expensive from the point of view of miniaturization and weight reduction. There are many problems from this point of view.

The present invention solves these conventional problems, and includes a pair of pinch rollers and a capstan, and by switching the rotation direction of the capstan, at least the tape playback can be switched between the normal rotation direction and the reverse rotation direction. The purpose is to obtain a tape recorder configured as follows. However, in the forward rotation direction, the configuration is the same as a conventional reversible tape recorder, but in the reverse direction, since there is no pinch rotor and capstan that are present in conventional tape recorders, the drive force for drawing out the tape can be obtained from these. First, it is known that a significantly larger winding torque is required than in the normal rotation direction.

Furthermore, in the reversal direction, there is no force to pull the tape against the head due to the pinch roller and capstan on the reversal side, and the tape is fed out from a pair of pinch rollers and capstan, so tape running is slow. The problem was that the tape was unstable, and if left as it was, the tape would easily come off the head surface.

The present invention solves these problems and provides a tape recorder that has a simple configuration, enables recording and reproducing in the opposite direction, and realizes stable tape running.

Means for Solving the Problems In order to solve the above-mentioned problems, the tape recorder of the present invention is provided with a pair of pinch rollers and a capstan shaft, and by changing the direction of rotation of the capstan shaft, the tape recorder can adjust the speed of the tape during recording and playback. A pad position control member (hereinafter referred to as a pad shifter) is provided to switch the running direction of the tape, and a pad position control member (hereinafter referred to as a pad shifter) that moves only the pad within the tape force center away from the t-a air heft, and furthermore, a It is equipped with a tape guide.

Function: The tape recorder of the present invention can switch the running direction of the tape by switching the rotating direction using only a pair of pinch rollers and a capstan shaft, so it has a reverse recording and reproducing function with a simple configuration. In addition, with the bar shifter, there is no need to set the winding torque during reverse rotation particularly higher than during normal rotation, and by providing a tape guide near the pinch roller capstan, the tape at the upstream portion of the tape travel can be adjusted. This allows stable tape running by regulating the position.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 is a top view of the tape recorder of this embodiment, showing the reverse playback state. The magnetic helad 1o is the head substrate 1
3, and the head substrate 13 is rotated about a rotation shaft 16 as a fulcrum by a play button (not shown). 12 is a band shifter fixed to the magnetic helad 1o so as to surround the front portion.

FIG. 2(7) is a perspective view showing the pad shifter 12t, and FIG. 2(A) is a sectional view during playback. During playback, only the band 16 in the tape cassette 11 is moved by the band shifter.
12 to separate it from the front surface of the magnetic head 10.

Next, as shown in FIG. 3, the pinch roller arm body 14b
is rotatably supported on a rotating shaft 15, and a tape guide portion 14a is integrally formed with the pinch roller arm body 14bVC. Cheap guide section 14 during playback
The tape running position is regulated at the aO#11 section.

FIG. 1 shows an inverted playback state in which the second glue reel 8 serves as a take-up reel, the first glue reel 4 serves as a supply reel, and the blade board 13 is advanced, and the pad in the tape cassette is a pad shifter. 12, the pad is separated from the magnetic head 12, and only the tape is in contact with the magnetic head 12. Further, the running position of the tape is regulated by a tape guide 14a provided integrally with the pinch roller arm, and the tape is further driven and fed out by a capstan 1 and a pinch roller 2 immediately after the guide.

Furthermore, when switching the reproducing state in the forward direction, the rotation of the capstan 1a and the pinch roller 2a is reversed, and if the first reel 4 is used as a take-up reel, the structure can easily be the same as that of the conventional one.

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 because the running direction of the tape is switched by switching the rotation direction of a pair of capstans and a pinch roller. Although the recording and playback function in the reverse direction is obtained, the pad is pushed in by the pad shifter, eliminating the pressure of the pad against the magnetic head of the tape. There is no need to make it particularly large compared to
Power consumption can be reduced. Furthermore, by providing a tape guide, stable tape position regulation can be realized even in the above-mentioned simply configured reversing mechanism.

[Brief explanation of drawings]

FIG. 1 is a top view showing the reproduction state of a tape recorder according to an embodiment of the present invention, FIG. 2 (7) is a perspective view of the magnetic head section, FIG. Figure 3 is a perspective view of the pinch roller arm, Figure 4 shows a conventional tape recorder with a reverse function, and 7) shows the normal rotation.
(A) is a top view showing the state of inversion. 1a...First capstan, 1b...
-Second capstan, 2a...first pinch roller, 2b...second pinch roller, 4...
...First take-up reel, 8...Second take-up reel, 10...Magnetic direction, 12...
...Pad shifter, 14a...Tape guide section, 14b...Pinch roller arm body. Name of agent: Patent attorney Toshio Nakao and 1 other person! α
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Claims (1)

[Claims] It is equipped with a pair of pinch rollers and a capstan shaft, and by switching the rotation direction of the capstan shaft, the tape running during recording and playback can be switched between the forward direction and the reverse direction. 1. A tape recorder comprising a pad position control member for displacing a pad that presses a magnetic head against a magnetic head, and further comprising a tape guide near a tape running entrance of the pair of pinch rollers and a capstan shaft.