JPS633001Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a tape recorder that enables high-speed playback operations such as queue and review operations, and has a simple configuration that prevents the magnetic tape from wrapping around the capstan and other obstacles during these high-speed playback operations. The object of the present invention is to provide an excellent tape recorder that can prevent this from happening.

Generally, when performing high-speed playback operations such as queue operation and review operation on a tape recorder,
Since the magnetic tape is run at high speed while in contact with a magnetic head or pad, a large amount of static electricity is charged on the magnetic tape. Therefore, this can cause various problems such as the magnetic tape being wrapped around the capstan, or the magnetic tape being attracted to the magnetic head or pad, reducing the driving force of the magnetic tape by the capstan.

The present invention aims to eliminate the above-mentioned conventional drawbacks, and to provide an excellent tape recorder that can prevent these troubles with a simple configuration.

The tape recorder of the present invention will be described below with reference to drawings of one embodiment. In the figure, 1 is a head board, 2 is a pinch roller, 3 is a recording/playback head, and 4 is a head board.
1 is an erasing head, 5 and 6 are grounded contact pieces attached to the head board 1 together with the recording/reproducing head 3 and the erasing head 4, 7 is a tape cassette, 8 is a magnetic tape, 9 is a pad, and 10 is a capstan. .

In the above embodiment, since the contact pieces 5 and 6 are attached to the head board 1 together with the magnetic heads 3 and 4, when the magnetic heads 3 and 4 are in contact with the magnetic tape 8, the contact pieces 5 and 6 are also attached to the magnetic tape. It is in contact with 8. Therefore, in the constant speed running state of recording/playback, the head board 1 advances deeply relative to the tape cassette 7, and the contact pieces 5, 6 contact the magnetic tape 8 with a predetermined pressure, and at the same time, the magnetic heads 3, 4 become magnetic. Contact the tape with a predetermined pressure. On the other hand, Kyu,
In the high-speed playback operation state of the review, the head board 1 advances slightly shallower relative to the tape cassette 7 than in the constant speed running state, and the contact pieces 5 and 6 move toward the magnetic tape 8.
At the same time, the magnetic heads 3 and 4 contact the magnetic tape with a predetermined pressure that is weaker than when the magnetic tape is running at a constant speed. In this way, the contact pieces 5 and 6 are connected to the magnetic tape 8 not only in the constant speed running state but also in each of the queue and review states.
will come into contact with. Therefore, the magnetic tape 8
Even if a large amount of static electricity is generated due to contact with the magnetic heads 3, 4 or pad 9, this static electricity will be grounded via the contact pieces 5, 6, and the magnetic head 3 or capstan 10 will cause the static electricity to be grounded. It is possible to prevent the tape 8 from being attracted and the driving force of the magnetic tape 8 by the capstan 10 being reduced, or from winding the magnetic tape 8 around the capstan 10.

As is clear from the above embodiments, according to the tape recorder of the present invention, the contact pieces that contact the magnetic tape and ground the static electricity charged on the magnetic tape are attached to the head board so as to be located on both sides of the magnetic head. During high-speed playback operations such as queue and review, in which the magnetic head contacts the magnetic tape and travels at high speed, and during constant-speed playback operations, in which the magnetic head contacts the magnetic tape and travels at a constant speed, the contact piece is attached to the magnetic head. The contact piece contacts the magnetic tape on the downstream side of the capstan, and the contact piece can ground the static electricity that has accumulated on the magnetic tape, preventing problems such as the magnetic tape wrapping around the capstan. , which is extremely advantageous in practice. Since the contact piece is attached to the head board, it comes into contact with the magnetic tape with less pressure during high-speed playback than during constant-speed playback, and the contact piece grounds the static electricity charged on the magnetic tape. In addition, smooth running of the magnetic tape can be realized both during constant-speed reproduction operation and during high-speed reproduction operation.

[Brief explanation of the drawing]

The figure is a schematic configuration diagram of an embodiment of the tape recorder of the present invention. 1...Head board, 2...Pinch roller, 3,
4... Magnetic head, 5, 6... Contact piece, 7... Tape cassette, 8... Magnetic tape, 9... Pad, 10... Capstan.

Claims (1)

[Scope of utility model registration request] A head board having a capstan that can be moved into and out of contact with a capstan, and a magnetic head for reproduction that can be moved into and out of contact with a magnetic tape housed in a tape cassette, and the magnetic head is in contact with the magnetic tape and runs at high speed. During the high-speed playback operations of queue and review and the constant-speed playback operation in which the magnetic head contacts the magnetic tape and runs at a constant speed, the magnetic tape contacts the magnetic tape on the downstream side of the magnetic head and charges the magnetic tape. 1. A tape recorder comprising contact pieces for grounding static electricity generated by the magnetic head, the contact pieces being attached to the head substrate so as to be located on both sides of the magnetic head.