JPS5833608B2 - Recording head degaussing and wiping device for tape recorders - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a rotating disk mounted on a housing so as to be fitted onto a tape rotating shaft of a tape recorder, disk-shaped permanent magnet pieces pivotally supported at both front and rear ends of a frame, and An endless belt is stretched between the driven wheels, and a friction plate that contacts the inner peripheral surface of the belt is attached to the frame, and an operating ring that is removably mounted on the housing and engages with the operating rod. pivoted to the housing so as to stop;
and a lever configured to be swung by a capstan for supporting a tape feed roller provided on the tape recorder when the housing is attached to the tape recorder to cause the operating ring to protrude from the housing, and a button on the housing. The rotary disk is pivotally supported between the rotating disk and the operating ring, is in pressure contact with the endless belt and the friction plate, rotates with the rotation of the rotating disk, and drives the endless belt, and also drives the endless belt through the friction plate. This device relates to a recording head degaussing device for a tape recorder, which is characterized by an idler configured to move an operating ring into and out of a housing. To provide an improved recording head demagnetizing and wiping device for a tape recorder which can demagnetize and wipe the recording head of a tape recorder.

Since the present invention is configured as described above, when a cassette tape is attached to the tape recorder in the same manner as the case, the capstan for supporting the tape feed roller disposed on the tape recorder is pivoted to the case. As a result, the locked operating ring of the lever protrudes from the housing, and the disc-shaped permanent magnet piece pivoted at its front end starts recording the tape recorder. contact the head.

When the tape recorder is fast-forwarded in this state, the rotating inner wall fitted to the tape rotating shaft of the tape recorder rotates, and the idler rotates following this rotation, and the idler, the endless belt, and the friction plate rotate. Due to the frictional force generated during this process, the endless belt circulates between the disk-shaped permanent magnet piece at the front end and the driven wheel at the rear end, and the disk-shaped permanent magnet piece is driven and rotated by the endless belt.

Therefore, the recording head is erased by the rotation of the permanent magnet piece, and the recording head is also cleaned by the endless belt that scrapes the surface of the recording head.

On the other hand, due to the frictional force generated between the idler, which rotates following the rotation of the rotary disk, and the friction plate, the operating ring is retracted and retracted into the housing.

Therefore, when the housing is removed from the tape recorder, the disc-shaped permanent magnet piece is spaced apart from the recording head, so there is no risk that the recording head will be magnetized.

As described above, according to the present invention, degaussing and wiping of the recording head of a tape recorder can be easily and reliably performed using the same usage method as for cassette tapes.

Generally, degaussing of the recording head is activated by playing a tape record, but in this case, a large input is applied to the amplifier connected to the tape recorder, which may damage speakers, etc., and the degaussing magnet Since the rotation speed cannot be increased, the frequency of the magnetic flux cannot be increased, and therefore the demagnetization effect is low. However, in the present invention, the recording head is demagnetized by a fast-forward operation, so that the above-mentioned defects can be eliminated.

The present invention will be described below with reference to the illustrated embodiments.

Reference numeral 1 denotes a housing, on which is mounted a rotary disk 2 configured to be fitted onto the tape rotation shaft when the tape recorder is installed.

Reference numeral 3 denotes an operating ring which is attached to the housing 1 so as to be freely retractable, and an endless belt 6 is suspended between a disc-shaped permanent magnet piece 4 pivoted at the front end of the operating ring and a driven wheel 5 pivoted at the rear end. A friction plate 7 that is in contact with the inner circumferential surface of the endless belt 6 is attached to the outer circumference of the operating ring 3.

A slot 8 extending in the longitudinal direction is bored in the center of the operating ring 3, and the operating ring 3 is slidably and loosely fitted into a guide piece 9 protruding from the bottom of the housing 1. 9 and the slot 8 as guides, it moves forward and backward directly, and is arranged so that it can move in and out of the housing 1.

A damping material 10 such as silicone grease is loaded between the upper and lower surfaces of the operating ring 3 and the upper and lower surfaces of the housing 1, and the damping material 10 is filled into the housing 1 when the operating ring 3 is retracted as described later. This reduces the speed of retraction.

(See FIG. 4) Reference numeral 11 denotes an idler pivotally supported by the housing 1 so as to be interposed between the rotating disk 2 and the operating ring 3. is in pressure contact with.

Reference numeral 12 denotes a two-pronged lever pivotally supported by the housing 1, and is rotated in the direction of the hour hand by the urging force Kj of the bullet 13 interposed between the lever and the housing 1.

Further, a plate spring 15 that engages and disengages the bulging locking portion 14Vc of the operating ring 3 is attached in a cantilevered manner to the tip of one of the arm pieces.

Furthermore, an inclined plate 16 is disposed at the free end of the other arm, and when the housing 1 is attached to a tape recorder, a capstan for supporting the feed roller of the tape recorder is inserted through a through hole 17 formed in the housing 1. a enters into the container casing 1 and presses the inclined plate 16 while sliding on it (see Figs. 5 and 6). It rotates counterclockwise against the

In the figure, reference numeral 18 denotes a stopper attached to the free end of one arm of the lever 12, which supports the back surface of the plate spring 15 and moves its rotation when the lever 12 rotates counterclockwise as described later. At the beginning of the operation, the plate spring 15 does not come off the bulging locking part 14 of the operating ring 3, and presses both parts 14 to move the operating ring 3 forward.

In the illustrated example, the stopper 18 is composed of a pair of pieces that face each other with the plate spring 15 in between, and a bulge protruding from the opposite ends of the two pieces prevents the plate from flying off. 15, and the gap between the two parts is expanded by the enlarged bulge 1 of the actuating ring 3.
4 is designed to penetrate.

In the map, reference numeral 19 is a through hole drilled in the housing 1 into which a driven shaft for a tape recorder is to be inserted.

Since the illustrated device is configured as described above, the device housing 1
When mounted on a tape recorder, the rotary disk 2 is fitted onto the drive shaft of the tape recorder, and the capstan a of the tape running roller of the tape recorder enters into the housing 1 through the through hole 17, and the lever 12 Press the inclined plate 16 at the tip of one arm of the
Rotate the hour hand in the direction of the hour hand against the force applied in step 3.

As the lever 120 rotates, the plate 1 engaged with the bulging engagement portion 14 of the operating ring 3 as shown in FIGS. 1 and 7
5 also rotates in the counterclockwise direction, presses the locking portion 14, moves the operating ring 3 forward using the slot 8 and the guide piece 9 as guides, and moves the disc-shaped permanent magnet piece 4 at the front end into the tape recorder's recording position. Bring it into contact with head b.

During this time, the plate spring 15 pressing the bulging locking part 14 is supported by the stopper 18 on its back side and is restricted from rotating in the direction of the hour hand, so it does not come off the bulging locking part 14. I have no fear.

As the lever 12 further rotates in the counterclockwise direction, the leaf spring 15 is disengaged from the bulging locking portion 14 (see FIGS. 2 and 8), and the lever 12 is rotated as shown in FIGS. 3 and 9. occupy the position shown.

When the tape recorder is fast-forwarded in this state, the rotating disk 2 rotates in the direction of the hour hand as shown by the arrow in FIG. 2, and the idler 11 accordingly rotates in the direction of the hour hand.

At this time, due to the frictional force generated between the idler 11, the endless belt 6, and the friction plate 7, the endless belt 6 circulates between the disk-shaped permanent magnet piece 4 and the driven wheel 5 in the direction of the arrow. Permanent magnet piece 4 rotates.

Therefore, the recording head b has an endless belt 6 that performs a circular motion.
The magnet is rubbed and wiped by the magnet, and is demagnetized by the rotation of the disc-shaped permanent magnet piece 4.

On the other hand, due to the frictional force between the idler 11 and the friction plate 7, the operating ring 3 retreats using the groove hole 8 and the guide piece 9 as a guide, and retreats into the housing 1 to move into the old case shown in FIG. return to the state of

At this time, the backward movement of the actuating ring 3 is braked by the braking material 10 such as the silicone grease, so that the actuating rod 3 is prevented from moving backward too quickly, and the recording head b is reliably demagnetized. It is something.

When degaussing and wiping of the recording head b is completed, the operation of the tape recorder is stopped and the housing 1 is removed from the tape recorder, the capstan a comes off from the housing 1, and the lever 1
2 is rotated in the direction of the hour hand by the urging force of the bullet 13.

During the rotation of the lever 120, the leaf spring 15 collides with the bulging locking part 14 (see Fig. 10), and then rides over the rotating part 14, returning the lever 12 to the old state shown in Fig. 1. .

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various designs without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

1 to 3 are plan views showing the states of an embodiment of the recording head degaussing and wiping device for a tape recorder according to the present invention at the time of starting, during operation, and at the completion of operation, respectively, and FIG.
5 and 6 are vertical sectional views showing the state of the tip of the lever before and after the tape recorder is installed, respectively. Plan view showing the relationship between the lever and the operating ring in the process, 1st
FIG. 1 is a longitudinal sectional view of FIG. 7. 1... Instrument housing, 2... Rotating disk, 3... Operating ring, 4
... Disc-shaped permanent magnet piece, 5 ... Driven wheel, 6 ... Endless belt 7 ... Friction plate, 11 ... Idler, 12
···lever.

Claims (1)

[Claims] 1. An endless belt is installed between a swinging rotating disk mounted on a housing so as to be fitted onto the tape rotating shaft of a tape recorder, disk-shaped permanent magnet pieces pivotally supported at both front and rear ends of the frame, and a driven wheel. A friction plate is mounted on the frame body and is in contact with the inner circumferential surface of the belt, and an operating ring is mounted on the housing so as to be retractable, and a friction plate is attached to the housing so as to be engaged with the operating rod. a lever that is pivotally supported and configured to be swung by a capstan for supporting a tape feed roller applied to the tape recorder when the housing is mounted on the tape recorder, and to cause the operating ring to protrude from the housing; The rotary disk is pivotally supported between the rotary disk mounted on the housing and the operating ring, is in pressure contact with the endless belt and the friction plate, and rotates with the rotation of the rotary disk to drive the endless belt and the friction plate. What is claimed is: 1. A recording head demagnetizing and wiping device for a tape recorder, comprising an idler configured to move an operating ring into and out of a housing through the idler.