JPH0110768Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reel stand device for a tape recorder that uses an electromagnet to forcibly stop the rotation of the reel stand.

Conventionally, the reel stand of a tape recorder has a function of applying a friction brake to the reel stand to apply back tension to the reel stand and to control the rotation of the reel stand when the reel stand is used as a tape supply reel stand. On the other hand, when the reel stand is used as a tape take-up reel stand, it is equipped with a function to rotate in conjunction with a rotary drive source such as a flywheel. be.

In order to equip the reel stand with these functions,
Conventionally, a friction mechanism and a mechanical brake mechanism have been used in the reel stand structure, and in particular, the brake mechanism for forcibly stopping the rotation of the reel stand utilizes the pressing force of the operating push button of the tape recorder. Mechanisms that do this are often used.

On the other hand, in the case of feather touch (soft touch) button type tape recorders that have recently been commercially available, since the pressing force of the push button cannot be used, the tape recorders are driven by the signal current output by pressing the feather touch button. A mechanism is adopted that uses a solenoid to forcefully stop the rotation of the reel stand.

For this reason, feather touch button type tape recorders have disadvantages such as a complicated reel stand structure and a large current required for driving solenoids and the like.

Furthermore, since the drive current is applied to the solenoid etc. in an analog manner, it is not suitable for controlling a feather touch button type tape recorder using a microcomputer.

The present invention was made with the aim of eliminating the drawbacks of the above-mentioned prior art.The features of the present invention are that the iron core fixed to the case is configured to forcibly stop the rotation of the reel stand using an electromagnet. By providing a reel shaft in the holder and attaching the case to the chassis, the electromagnet and the reel stand can be attached to the chassis.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a board serving as the chassis of the tape recorder, and 2 is a storage case fixed to the board 1.

An iron core 3 for adsorption is housed approximately in the center of the case 2, and the lower part of the iron core 3 is caulked by caulking means to fix the iron core 3 to the case 2. In the figure, 3a indicates a caulking portion. In other words, the iron core 3 is fixed to the substrate 1 via the case 2.

A coil 4 is wound around the outer periphery of the iron core 3 to form an electromagnet 4'.

A reel spindle 6, which serves as a reel shaft for rotatably supporting the reel stand 5, has an iron core 3.
It is press-fitted into a hole 3b drilled in the center of the hole 3b. In this way, the reel spindle 6
It is attached to the board 1 via.

The reel stand 5 is loosely fitted onto the reel spindle 6, and a coil spring 7 is provided between the reel drive pawl 5a and the rotation transmission gear 5b to bias the reel drive pawl 5a upward. A bush 8 and a washer 9 are disposed on the upper part of the reel 5 in order to prevent the reel stand 5 from falling off the reel spindle 6 due to the upward biasing coil spring 7.

The bush 8 is loosely fitted onto the reel stand 5, while the washer 9 is lightly press-fitted into the upper end of the reel spindle 6.

An iron plate 10 to be attracted that rotates integrally with the reel stand 5 is provided on the surface of the reel stand 5 closer to the substrate 1, that is, on the lower surface. A permanent magnet 11 for applying back tension is press-fitted into the iron core 3, and a permanent magnet 11 is loosely fitted to the reel spindle 6 and applies frictional force to the reel stand 5 by the attraction force of the permanent magnet 11. A nonwoven fabric 12 such as felt is interposed therebetween.

The operation of the reel stand device according to the present invention will be explained below.

When the reel stand 5 is used as a reel stand on the supply side, the iron plate 10 is always attracted by the attraction action of the permanent magnet 11 while the reel stand 5 is rotating, and this causes friction between the nonwoven fabric 12 and the iron plate 10. Therefore, the reel stand 5 is lightly braked and back tension is applied to the reel stand 5.

Furthermore, when the reel stand 5 is used as a reel stand on the winding side, the rotational force of the flywheel (not shown) is applied to the gear 5b provided on the reel stand 5 via an idler (not shown) or the like. transmitted through the street.

No matter how the reel stand 5 is used, if the coil 4 is momentarily energized, the iron plate 10 will be attracted by the adsorption action of the iron core 3 of the electromagnet 4', forcing the reel stand 5 to rotate. be stopped.

As explained above, the present invention has the configuration described in the claims for utility model registration, in particular, a configuration in which a reel shaft is provided on the iron core of the electromagnet, and a reel stand is rotatably attached to the reel shaft, and the electromagnet is By attaching the case for storage to the chassis, the electromagnet and reel stand are attached to the chassis, making it possible to provide the electromagnet part on the opposite side of the chassis from the reel stand, and making the electromagnet part particularly thin. Even if you don't have one, you can easily set the reel stand to a lower position. In addition, since the reel shaft is provided on the iron core of the electromagnet, there is no need for a chassis to be interposed between the reel stand and the electromagnet.
The configuration is also simple because there is no need to incorporate a special transmission mechanism for transmitting the driving force of the electromagnet from below the chassis to the reel stand above the chassis. Furthermore, even when an electromagnet is incorporated under the reel stand and the electromagnet is used to apply a brake to the reel stand, the electromagnet part can be made to protrude from the chassis on the opposite side of the reel stand, so the reel stand By incorporating the electromagnet under the reel, there is no problem of having to change the height of the reel stand, and other excellent effects are achieved.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view of the reel stand device according to the present invention. DESCRIPTION OF SYMBOLS 1... Board, 2... Case, 3... Iron core, 4... Coil, 4'... Electromagnet, 5... Reel stand, 6... Reel spindle, 10... Iron plate, 11... Permanent magnet, 12...
Non-woven fabric.

Claims (1)

[Scope of utility model registration request] An iron core is fixed approximately at the center of a case for storing an electromagnet, and a coil is arranged around the iron core within the case, and the iron core is magnetized by energizing the coil. The reel includes an electromagnet, a reel stand rotatably attached to the iron core with a reel axis fixed to the iron core, and a magnetic material that is attracted to the iron core and applies a braking force to the reel stand. A reel stand device for a tape recorder, wherein the case is attached to the chassis so as to protrude below the chassis.