JPH0253862B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is rotatably supported by a tape recorder main body, and in a state where the tape cassette is stored, the tape cassette is moved against a tape running mechanism provided in the tape recorder main body. This invention relates to a tape recorder equipped with a cassette holder configured to be attached and detached.

Conventional configurations and their problems In general, a tape recorder has a cassette holder rotatably supported on the tape recorder body, and when a tape cassette is stored in the cassette holder, the tape running mechanism provided on the tape recorder body is rotated. The tape cassette is attached and detached using the tape cassette. In the above-mentioned tape recorder, the cassette holder has been constructed of a metal material as the main body of the device has become smaller and thinner. However, when using the metal cassette holder described above, the cassette holder is rotatably supported on a synthetic resin chassis, and the tape running mechanism fixes the substrate to the chassis and applies a predetermined ground potential. There was a problem in that electrostatic noise was generated when the eject operation was performed because the capacitor was used as a ground electrode for the main body of the device. That is, the tape running mechanism board to which a predetermined ground potential is applied and the cassette holder are electrically separated by a chassis, while the metal ejector is rotatably supported on the tape running mechanism board. Since the levers face each other with a predetermined gap when the cassette holder is closed, the tape running mechanism board and the cassette are connected at the moment the eject lever comes into contact with the cassette holder when the eject lever is operated. There was a problem in that noise was generated due to the potential difference between the holder and the holder.

OBJECTS OF THE INVENTION An object of the present invention is to provide a tape recorder that can effectively remove noise generated at the instant of an eject operation.

Structure of the Invention In the tape recorder of the present invention, a metal cassette holder is rotatably supported on a synthetic resin chassis, and a tape running mechanism board to which a predetermined ground potential is applied is fixed to the tape running mechanism board. Eject levers rotatably supported are configured to face each other with a predetermined gap when the cassette holder is closed, and the cassette holder is electrically connected to the tape running mechanism board by grounding means. It is configured as follows.

DESCRIPTION OF THE EMBODIMENTS FIGS. 1 to 4 show an embodiment of the tape recorder of the present invention, and in the figures, 1 is a synthetic resin chassis that also serves as the cabinet of the main body of the device;
2 is a metal cassette holder rotatably supported by the chassis 1; 3 is this cassette holder 2;
The cassette lid 4 is attached to the chassis 1 by means of adhesive or the like, and is a tape running mechanism board fixed to the chassis 1, which is made of a metal material so as to be provided with a negative ground potential. 5
An eject lever is rotatably supported on the tape traveling mechanism board 4 by a support shaft 6, and is configured to kick up the cassette holder 2 in response to operation of an eject button (not shown). . That is, the eject lever 5 is opposed to the cassette holder 2 with a predetermined gap when the cassette holder 2 is closed, and comes into contact with the cassette holder 2 in response to the operation of the eject button to remove the cassette holder 2. The cassette holder 2 is kicked up.

The cassette lid 3 is made of a synthetic resin material and has a metal decorative plate 7 on its surface, and as shown in FIG. By coupling the decorative plate 7 to the cassette holder 2, the decorative plate 7 is electrically connected to the cassette holder 2. The tape running mechanism board 4 also includes a second chassis 9 made of synthetic resin and an elastic terminal plate 10 made of metal, as shown in FIG.
The chassis 1 is fixed by a set screw 11 passing through the chassis 1.
installed on. Here, the terminal plate 10 has locking claws 11a, 1 at the ends provided on opposite sides.
1b (11b is not shown);
12b is an engagement hole 1 provided in the second chassis 9.
3a and 13b and temporarily fasten them, and in this state, insert the fasteners into the through holes 14 provided in the chassis 1, the through holes 15 provided in the second chassis 9, and the through holes 16 provided in the terminal board 10. screw 11
into the screw hole 17 of the mounting piece 21 provided on the tape traveling mechanism board 4.
By tightening the tape drive mechanism board 4, it is fixed to the chassis 1 together with the tape running mechanism board 4. The elastic tongue piece 18 of the terminal plate 10 supports the rotary support shaft 1 which rotatably supports the cassette holder 2 on the chassis 1.
9. The cassette holder 2 has bearing plates 20a and 20b integrally provided on the chassis 1, as shown in FIGS. 3 and 4.
It is attached to a metal rotary support shaft 19 rotatably attached to the holder, and is supported rotatably in the direction of the arrow shown in the figure. Therefore, the cassette holder 2 has the elastic tongue piece 18 of the terminal plate 10 on its rotational support shaft 19.
By contacting the tape transport mechanism board 4, electrical continuity is established with the tape transport mechanism board 4.

In such a configuration, when the cassette holder 2 is closed with the tape cassette 22 stored therein, the cassette holder 2 is opposed to the eject lever 5 provided on the tape transport mechanism board 4 with a predetermined gap. I'm just doing it. However, the elastic tongue piece 18 of the terminal plate 10 attached to the tape running mechanism board 4 with an electrical contact is in contact with the rotating support shaft 19 that rotatably supports the cassette holder 2 on the chassis 1. Therefore, the cassette holder 2 is placed at the same potential as the negative ground potential applied to the tape transport mechanism board 4. Therefore, in response to the operation of the eject button, the eject lever 5 is activated.
The noise generated at the moment when the cassette holder 2 comes into contact with the cassette holder 2 can be suppressed. Further, since the cassette cover 3 provided on the front side of the cassette holder 2 has a decorative plate 7 provided on its surface electrically connected to the cassette holder 2 by a set screw 8, the terminal plate 10 It is electrically connected to the tape running mechanism board 4 through the tape running mechanism board 4, and is at the same potential as the negative ground potential applied to the tape running mechanism board 4. Therefore, the cassette lid 3 does not have static electricity, and noise caused by shock and static electricity when a human body comes into contact with the decorative plate 7 can be suppressed.

Effects of the Invention As detailed above, according to the present invention, there is provided a metal cassette holder rotatably supported by a synthetic resin chassis, and a metal cassette holder fixed to the chassis and provided with a predetermined ground potential. A tape running mechanism board, which is rotatably supported by the tape running mechanism board, and is arranged so that when the cassette holder is closed, the cassette holder is kicked up when the cassette holder is closed with a predetermined gap therebetween. A metal eject lever means that is brought into contact with the cassette holder and a grounding means for electrically connecting the cassette holder to the tape running mechanism board, and the grounding means is used to fix the tape running mechanism board to the chassis. The cassette holder has an elastic metal terminal plate that is tightened and fixed together with a metal setscrew, and the terminal plate is configured to elastically abut against the rotating shaft. It can be set to the same potential as the ground potential given to the tape running mechanism board.
Noise based on the potential difference between the two can be suppressed. Furthermore, since the metal terminal plate is always in contact with the rotating support shaft with an elastic force based on a constant amount of deformation, stable conduction can be achieved for a long time without excessive deformation or elastic fatigue. Can be done.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of the main parts showing an embodiment of the tape recorder of the present invention, FIGS. 2 and 3 are enlarged sectional views of the main parts, and FIG. 4 is an enlarged assembled perspective view of the main parts. . 1... Chassis, 2... Cassette holder, 3...
...Cassette lid body, 4...Tape running mechanism board, 5...Eject lever, 7...Decoration plate, 8
... Set screw, 10 ... Terminal board, 11 ... Set screw, 19 ... Rotating shaft.

Claims (1)

[Scope of Claims] 1. A metal cassette holder rotatably supported by a synthetic resin chassis via a metal rotating shaft; a tape running mechanism board; a metal eject lever means rotatably supported by the tape running mechanism board and brought into contact with the cassette holder so as to kick up the cassette holder when an eject operation is performed; and a grounding means electrically connected to the tape running mechanism board via a rotating shaft, the grounding means being connected to the tape running mechanism board by a metal set screw fixing the tape running mechanism board to the chassis. 1. A tape recorder comprising an elastic metal terminal plate that is fastened together and fixed, and the terminal plate is attached so as to elastically abut against the rotational support shaft. 2 The cassette holder has a cassette lid made of synthetic resin with a metal decorative plate on its surface, and the decorative plate of the cassette lid is fixed to the cassette holder itself with a metal set screw for electrical connection. 2. The tape recorder according to claim 1, wherein the tape recorder is configured to have a high electrical conductivity.