JPS6346501B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape recorder using a tape cassette, and more particularly to a tape recorder having a pad position control member that operates relative to a fixed magnetic head.

Conventional configurations and their problems In recent years, efforts have been made to make tape recorders smaller and lighter in order to make them more portable. A conventional tape recorder will be explained below. FIG. 1 shows the stopped state, and FIG. 2 shows the recording/playback state. As shown in the figure, a magnetic head and a pinch roller are configured to move forward and backward relative to the tape cassette installed therein. That is, 1 is a mounted tape cassette, and 2 is a capstan that is erected through a substrate (not shown). 3 is a magnetic head fixed on a head seat 4, 5 is a pinch roller rotatably held by a pinch roller arm 6, and 7 is provided upstream of the magnetic head 3 in the tape running direction (direction of arrow A in the figure). The head seat 4, pinch roller arm 6, and tape guide 7 of the magnetic head 3 are fixed on a single head substrate 8. This head board 8 is constructed so that the magnetic head 3 can slide forward and backward relative to the front opening window of the tape cassette 1 depending on the operating mode, and can perform recording or playback operations from the stopped state shown in FIG. When this is done, the driving part such as a motor and the fixed part become in a predetermined operating state, and the head board 8 slides in the direction of arrow B.
As shown in FIG. 2, the magnetic head 3, pinch roller 5, and tape guide 7 enter through predetermined front opening windows of the tape cassette 1 and come into contact with the tape. When a stop operation is performed from this state, the head board 8 moves back and enters the stopped state shown in FIG. It should be noted that the head board 8 is
is in the position shown in FIG.

In the above-mentioned conventional configuration, the head board 8 must be in a retracted position in order to mount and remove the tape cassette 1, that is, the movement stroke 1 of the head board 8 shown in FIG. 1 is essential.

Therefore, in order to eliminate the above-mentioned drawbacks, the magnetic head is fixed and the tape cassette is inserted from a direction substantially perpendicular to the front surface of the magnetic head, as proposed by the present inventor in Japanese Patent Application No. 57-26279. The magnetic head is inserted into the front opening window of the tape cassette, the tape is brought into contact with the magnetic head, and the pad position control member provided near the magnetic head allows the tape to be moved inside the tape cassette during stop, fast forward, and rewinding states. If the pad is separated from the magnetic head, the tape recorder can be made smaller in the width direction of the tape cassette. However, although the pad is spaced apart from the magnetic head and does not press against the magnetic tape, the tape is actually in contact with the magnetic head, so when fast forwarding or rewinding, a high speed playback sound appears, and the playback state is When stopping the tape, there is a problem in that unless the tape running completely stops at the same time as the stop operation, an abnormal noise corresponding to the amount of tape running remains and can be heard.

Purpose of the invention The present invention solves the above-mentioned conventional problems.
It is an object of the present invention to provide a tape recorder in which not only the pad but also the magnetic tape can be separated from the magnetic head by a pad position control member without increasing the number of parts, and which prevents the generation of abnormal noise when stopped. shall be.

Structure of the Invention The present invention includes a magnetic head that is introduced through a front opening window and comes into contact with the tape when a tape cassette is installed, and a magnetic head that is inserted together with the magnetic head through the opening window and presses the magnetic tape against the magnetic head inside the tape cassette. This tape recorder is equipped with a pad position control member for displacing the pad, and the pad position control member allows the pad to press the magnetic tape against the magnetic head during recording and playback, and
By configuring the magnetic tape to be separated from the magnetic head along with the pad during fast forwarding, rewinding, and stop states, it is possible to eliminate abnormal noise caused by constant contact between the magnetic head and the magnetic tape.

DESCRIPTION OF EMBODIMENTS FIG. 3 is a perspective view of a tape recorder according to an embodiment of the present invention, with the insertion direction of the tape cassette 1 being C.
Indicated by 9 is the main body of the tape recorder, 10 is the shaft 1
a holder 1 which is configured to be openable and closable around the tape cassette 1 and which holds the tape cassette 1 from the insertion direction C;
2 (described later) on the inner surface. FIG. 4 shows the tape recorder in a state where the cassette lid 10 holding the inserted tape cassette 1 is closed and the tape can be run.

FIG. 5 is a perspective view of the holder section viewed from the direction of arrow D in FIG. 3. FIG. A magnetic head 13 is fixed on a head seat 14, and this head seat 14 is further fixed on a holder 12. Reference numeral 15 denotes a pad position control member (hereinafter referred to as a pad shifter) consisting of a pad pressing part 15a configured to surround the front part of the magnetic head 13, and a support part 15b integrally formed with this pad pressing part 15a. The portion 15b is rotatably supported by a pin 16 implanted in the holder 12. Reference numeral 17 denotes a coil-shaped spring that applies a rotation force to the pad shifter 15 in a direction in which the pad pressing portion 15a approaches the magnetic head 13 from the front portion of the magnetic head 13, and is opposite to the pad pressing portion 15a with respect to the pin 16. It is provided on the side support part 15b, and one end is provided on the side support part 15b.
The other end is locked to a part of a tape guide 18 fixed to the holder 12.

19 is a control arm that controls the positions of the pad shifter 15 and the pinch roller;
3, a pin 2 provided in the holder on the opposite side to the pin 16 that serves as the fulcrum of the pad shifter 15;
It is rotatably supported on the shaft. This control arm 19 is provided with a locking portion 19a bent so as to be substantially parallel to the pin 20. 21 is pin 2
0, one end of which is locked and fixed to the holder 12, and the other end is locked to the locking part 19a of the control arm 19, and the rotation biasing force of this spring 21 causes the control arm to The pressing part 19b provided at the tip of the pad shifter 19 is the support part 1 of the pad shifter 15.
5b is pressed against said 17. Here, since the urging force exerted by the spring 21 on the pressing portion 19b is sufficiently larger than the urging force exerted by the spring 17, the pad pressing portion 15a of the pad shifter 15 is normally pressed against the magnetic head 13 as shown in FIG. It is projected forward.

Furthermore, FIGS. 6 and 7 are enlarged views showing the magnetic head 13 and pad shifter 15. 13a
1 is a head gap of the magnetic head 13, and 13b is a notch provided at the upper and lower ends of the front surface of the magnetic head 13. The pad pressing portion 15a presses against the notch 13 when the pad shifter 15 rotates rearward.
It is constructed so that b can fit inside. When the tape cassette 1 is inserted into the holder 12, the spring 21
The pad pressing portion 15a of the pad shifter 15 protrudes forward due to the biasing force, and since the width of the upper and lower openings of the pad pressing portion 15a is smaller than the width of the pad in the tape cassette 1, the pad is magnetically It is pushed backward so as to be separated from the head 13. In addition, in the recording and playback state, the seventh
As shown in the figure, the pad pressing portion 15a is located at the notch 13.
b, and in the fast forward, rewind, and stop states, it protrudes forward as shown in FIG. 6, displacing the pad inside the tape cassette 1.

8 and 9 show top views when the magnetic head 13 is surrounded by pad shifters 15. FIG. In the recording/playback state, as shown in FIG. 8, the pad pressing section 15a enters the notch 13b, thereby pressing the magnetic tape 23 against the front surface of the magnetic head 13 using the originally specified pressing force of the pad in the tape cassette. to press against. On the other hand, in the fast forward, rewind, and stop states, the pad shifter 15 protrudes forward as described above and displaces the pad, as shown in FIG.
As a result, the magnetic tape 23 is also separated from the magnetic head 13.

During this operation, the pinch roller 22 is away from the capstan 2 and the pad is also away from the magnetic head 13, so if the reel stand is rotated at high speed by the motor, the tape will run at high speed. With conventional pad shifters, the tape was in contact with the magnetic head, which resulted in the inconvenience that you could hear a kew/rev sound during fast-forwarding or rewinding, and when you stopped playback, the sound remained for the distance the tape traveled. Therefore, it was necessary to provide a circuit or the like to mute these. However, as described above, according to this embodiment, the pad shifter itself separates the magnetic tape from the magnetic head, thereby making it possible to eliminate the need for the mute circuit and the like.

Effects of the Invention As described above, according to the present invention, a pad position control member that enters through the front opening window of the tape cassette when the tape cassette is installed is provided together with the magnetic head, and in the recording and playback state, the magnetic tape is moved by the pad inside the tape cassette. Pressed against the magnetic head,
In the fast forward, rewind, and stop states, the pad is displaced by the pad position control member, and at the same time the magnetic tape is also separated from the magnetic head.For this reason, even if the magnetic head is fixed, it cannot be used in any mode other than the recording/playback state. In this case, since the magnetic tape is separated from the magnetic head, it is possible to eliminate the need for a mute circuit. Furthermore, since the magnetic tape is separated from the magnetic head in situations other than recording/playback, wear on the head can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a top view showing a conventional tape recorder in a stopped state, FIG. 2 is a top view showing the same playback state, and FIG. 3 is a perspective view showing an embodiment of the tape recorder of the present invention when a tape is inserted. Figure 4 is a perspective view of the tape being loaded, Figure 5 is a perspective view of the holder, Figure 6 is a perspective view of the magnetic head in fast forward, rewind, and stopped states, and Figure 7 is in recording/playback state. 8 is a top view of the magnetic head in recording/playback mode, and FIG. 9 is a perspective view of the magnetic head in the recording/playback state.
FIG. 3 is a top view of the magnetic head section in a stopped state. 12...Holder, 13...Magnetic head, 13
b... Notch, 15... Padded shifter, 15a
... Pad pressing portion, 15c, 15d... Opening end surface, 22... Pinch roller, 23... Tape.

Claims (1)

[Claims] 1. A magnetic head that is introduced through the front opening window of the tape cassette and comes into contact with the tape when the tape cassette is installed, and a magnetic head that enters together with the magnetic head through the front opening window when the tape cassette is installed;
and a pad position control member for displacing a pad that presses the magnetic tape against the magnetic head in the tape cassette, and the pad position control member is configured to press the magnetic tape against the magnetic head with the pad in the recording and playback state, and perform fast forwarding. 1. A tape recorder characterized in that, in a rewinding or stopping state, a pad is displaced to separate it from a magnetic head, and the pad position control member also causes the magnetic tape to be separated from the magnetic head.