JPS6122463A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To simplify the structure and operation and to eliminate the effect of magnetic noise by forming a piezoelectric motor with a ring rotating body itself provided with a lead post and providing a cylinder having a magnetic head to the inside of a ring of the piezoelectric motor. CONSTITUTION:When an AC voltage is applied to the ring-shaped piezoelectric motor 50 and the ring rotating body 58 is rotated in the arrow (clockwise), gears 59, 60, 61 are rotated by meshing with a gear part 57, and since an ejecting arm 4 is fixed to the gear 61, the lead post 5 is moved to draw a magnetic tape 2 to the position shown in broken lines 2'' from the opening of a cassette 1. Then the meshing with the gear part 57 is finished, only the ring rotating body 58 is kept turning clockwise while the lead arm 4 is stopped, the magnetic tape 2 is drawn by the lead post 27 and wound around the cylinder 31. The power supply to the piezoelectric motor 50 is stopped in this state, the magnetic tape is run at a constant speed and reproduction is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application and Prior Art] The present invention relates to a magnetic recording/reproducing device. A conventional magnetic recording/reproducing apparatus will be explained with reference to FIGS. 5 to 9. In Figure 5,
■ is a magnetic tape cassette, 2 is a magnetic tape, 8.8'
is a magnetic tape reel. In the stop mode, the magnetic tape 2 is in the state 2' and the pull-out arm 4 is in the position shown by the solid line. Reference numeral 5 denotes a drawer post installed in the drawer animation 4 and located within the opening of the magnetic tape cassette l. When the regeneration mode command is issued, the DC motor 6 starts rotating clockwise.
Belt 7, pulley 8, gear 9.1O111% 12.1
13 then Genevapine 14. The gear 17 at the final end is rotated counterclockwise via the Geneva cam 15 and the fan-shaped gear 16. This action moves the pull-out arm 4 to the position indicated by the broken line in FIG. 5, and pulls out the magnetic tape 2 from the 2' position to the 2'' position. During this time, the drive ring 18 meshing with the gear 10 also rotates clockwise. However, the rotating ring 19 is stopped.The reason for this is that, as shown in FIG. This is because they fit together.

Note that the rotating ring 19 is rotatably held by a guide roller 26.

In the states shown in FIGS. 5 and 6, when the gear lO rotates and the drive ring 18 rotates clockwise, the elongated hole z4 rotates counterclockwise in FIG. Since it is located at the tip in the counterclockwise direction, the rotating ring 19 does not rotate until the guide pin 2B is located at the rear end of the elongate 24 in the counterclockwise direction. However, although some rotational force is transmitted due to the friction between the guide pin z8 and the elongated shaft 24, the cam roller 20 is fitted into a recess 25 provided on the outer periphery of the rotating ring 19, and the cam roller 20 is moved by the support shaft 22 and the spring 21. Since the brake is applied by pressing the rotary ring 19 against the recess 25, the rotary ring 19 will not rotate due to the friction.

When the motor 6 rotates and the guide pin 2B comes to the rear end of the long shaft 24, the drive ring 18 stops idling and rotates clockwise together with the rotary ring 19, and the magnetic tape 2 is pulled out as shown in FIG. . That is, the cam roller 20
5, the magnetic tape 2 is pulled out by the lead post 27 installed in the rotating ring 19, and the magnetic tape 2 is pulled out by the lead post 27 installed in the rotating ring 19.
The tape is fed out onto the tape reel 3'. When the rotating ring 19 rotates, a switch (not shown) is turned off, the DC motor 6 stops, the pinch row 284 is pressed against the capstan 28 by the suppressing arm 85', and the magnetic tape 2 stops running.

When the stop mode command is issued in the state shown in Figure 9, the push-out arm 8
5' moves backward, and the DC motor 6 starts reverse rotation.

Accordingly, the drive ring 18 is rotated counterclockwise from the state shown in FIG. 9 via the belt 7 and gears 9 and 10.

The rotation ring 19 has a different positional relationship between the elongated ring 24 and the guide pin 28 than that shown in FIG. Lock bin 84' installed in 85
is pressed against the concave cam 24' at the longer end by a spring (not shown), so that it rotates together with the drive/g 19. When the magnetic tape returns to the 2" position shown by the broken line in FIG. 5, the cam roller 20 fits into the recess 25 and the lock lever 85
The lock bin 84' swings around the bin 86 as a fulcrum.
is removed from the concave cam 24', and the rotating ring 19 stops. Therefore, only the drive ring 18 rotates idly, and the guide pin 28 moves in the elongated hole 24 to the state shown in FIG. During this time,
Since the Geneva bin 14 moves the Geneva cam 15 from the position shown in FIG. 9 to the position shown in FIG. 5, the pull-out arm 4 swings from the position shown by the broken line in FIG. Motor 6 stops rotating.

However, the conventional devices shown in FIGS. 5 to 9 have the following problems. (1) One DC motor 6
first move the drawer arm 4, then move the guide pin 23
In order to operate around the cylinder 31, a long hole 24, a cam roller 20, a recess 25, a lock lever 85, a lock bin 84', a drive for the concave cam 24'', a brake mechanism, and a Geneva mechanism are required, making the structure and operation complicated. (2) Since the DC motor 6 uses the belt 7, accidents are likely to occur due to deterioration or slipping of the belt 7. (8) Since the magnetic tape 2 is close to the DC motor 6, There is a risk that the magnetic leakage of the DC motor 6 will have an adverse effect on the recorded signal. [Object of the Invention] An object of the present invention is to provide a magnetic recording/reproducing device in which the above-mentioned problems are solved.

[Structure of the Invention] The magnetic recording/reproducing device of the present invention has a ring-shaped rotating body pressed into contact with a ring-shaped elastic body fixed to a ring-shaped piezoelectric element, and the elastic A ring-shaped piezoelectric motor is formed to drive the rotating body by traveling wave vibration in the ring circumferential direction generated on the surface of the body, a cylinder having a magnetic head is provided inside the ring of the piezoelectric motor, and a magnetic tape is attached to the tape. The rotating body driven by the piezoelectric motor drives a mechanism for pulling out the magnetic tape from the cassette and mounting it on the cylinder, and feeds the magnetic tape.

Embodiments of the present invention will be described with reference to FIGS. 1 to 4. FIG. In FIGS. 1 to 4, the same parts as in FIGS. 5 to 9 are denoted by the same reference numerals, and the explanation thereof will be omitted. A feature of the present invention is that a piezoelectric motor is used in place of the DC motor 6. Reference numeral 50 designates a ring-shaped piezoelectric motor, which is composed of a stator consisting of an elastic body 51, a piezoelectric element 52, a felt 58, and a base 54, and a ring-shaped rotating body 58 consisting of a clutch plate 55 and a drive plate 56. . The elastic body 51 is made of a metal plate such as steel or brass, and the piezoelectric element 5z is adhered thereto. Electrode portions are formed on both sides of the piezoelectric element 5z by being divided in the circumferential direction. When an alternating current voltage is applied to this electrode portion, a mechanical traveling wave-like vibration is generated together with the elastic body 51 in the ring circumferential direction. The base 54 is made of resin or metal 9 and felt 5
8, the piezoelectric element 52 and the elastic body 51 are elastically held. The clutch plate 55 is made of a wear-resistant material.
It is integrally coupled with the drive plate 56. This ring-shaped rotating body 58 is rotatably held above the stator by guide rows 226 and is pressed against the stator.

A lead post 27, a gear portion 57, and a pinch roller 84 are swingably provided on the drive plate 56.

In the stopped state of FIG. 1, when a regeneration mode command is issued, an AC voltage is applied to the piezoelectric element 5z, and when a mechanical vibration traveling wave in the circumferential direction is generated on the upper surface of the elastic body 51, it comes into sealing pressure contact with this. The ring-shaped rotating body 58 rotates in the direction of the arrow in FIG. 1 (clockwise).

Therefore, the gear portion 57 meshes with the gear of the rotary body 58, and the gears 59, 60, and 61 rotate in conjunction with the rotation 9 in the direction of the arrow.

Since the pull-out arm 4 is fixed to the gear 61, the pull-out post 5 also rotates in the direction of the arrow, and the magnetic tape 2 is pulled out from the opening of the cassette 1 to the position 2'' shown by the broken line.

Then, the gear part 57 finishes meshing with the rotary body 58, the pull-out arm 4 stops, and only the rotary body 58 continues to rotate clockwise, and the magnetic tape is brought to the state shown in FIG. 2 by the lead post 27. It is pulled out until the end and wrapped around the cylinder 81.

In this state, the switch (not shown) is turned off, and the piezoelectric motor 5
When the power supply to 0 is stopped and the rotation of the rotating body 58 is stopped, the pressing arm 85' is rotated by an appropriate mechanism (not shown) to press the pinch roller 34 against the capstan 28 and cause the magnetic tape to run at a constant speed. .

Next, in the reproducing state shown in FIG. 2, when a stop mode command is issued, the pressing arm 8 is activated by an appropriate mechanism (not shown).
5' is retracted from the state shown in FIG. 2 to the state shown in FIG. 1, and the pinch roller 84 is separated from the capstan 28. Then, a switch (not shown) is turned on, and an AC voltage is applied to the piezoelectric element 52 so as to generate a counterclockwise traveling wave.
, the lead post 27 is turned counterclockwise to return the magnetic tape to the state shown by the broken line in FIG. When the rotating body 58 continues to rotate further counterclockwise, the gear portion 57 starts to engage the gear of the rotating body 58 again, and the drawer post 4 is rotated clockwise through the gears 59, 60, and 61 to the position shown by the solid line. A magnetic tape is inserted into the cassette (1) at position 2', and a switch (not shown) is turned off to stop the rotating body 58.

In the above embodiments, the tape is wound in the α type, but it can also be wound in the Ω type as shown in FIG. That is, the piezoelectric motor 5o has a lead post 27 on the upper surface of the rotating body.
, and has a gear portion 50'. A concentric gear 64 is rotatably held on the top surface of the rotating body (not shown).
Similarly, it has a lead post 27. The gear 62 meshes with the gear portion 50' and the gear 68.
meshes with the gear 64. Magnetic tape 2 is in the cassette)
When the rotating body rotates in the direction of the arrow when the lead post is at position 2' in the opening of
Turn the gear 64 in the direction of the arrow via the gear 68 and similarly pull out the IJ-to post from 27' to the 27 position.

The magnetic tape is then wound from position 2' into the playback state.

[Effects of the Invention] The magnetic recording and reproducing apparatus of the present invention has the above-described structure and function, and the ring-shaped rotating body 58 itself provided with the lead post 27 generates power, so that the conventional DC motor 6 is not required. This eliminates the need for the drawer arm 40 rotation mechanism and simplifies the mechanism. Therefore, the entire device can be made small and lightweight. In addition, the power is not generated by electromagnetic force as in conventional DC motors, but by mechanical vibration of a piezoelectric element, so there is no influence of magnetic noise at all, making it ideal as a power source for magnetic recording and reproducing devices. Furthermore, since there is no need to decelerate and transmit power using a belt or the like, there is no risk of accidents due to belt deterioration, and the magnetic recording and reproducing device can be made highly reliable.

[Brief explanation of the drawing]

Fig. 1: A plan view of the apparatus according to the embodiment of the present invention when it is stopped Fig. 2: A plan view of the apparatus shown in Fig. 1 when it is regenerated Fig. 8: XY of Fig. 1
Line sectional view Fig. 4 2 Plan view of another embodiment of the present invention Fig. 5: Plan view of the conventional device Fig. 6: Back side of the ring of the conventional device Seventh factor: Cross section of the ring in Fig. 6 Figure 8: Side view of the ring in Figure 6 Figure 9: Plan view of the device in Figure 5 during playback 1...Tape cassette, z...Magnetic tape, 8...Tape reel, 4 ...Drawer arm, 5...Drawer post, 6...
・DC motor, 7...belt, 8...hooley, 9.
1O111%12.1B...Gear, 14...Geneva pin, 15...Geneva cam, 16...Sector gear, 18...Driving ring, 19...Rotating ring,
20...Cam roller, 21...Spring, 22...Spindle, 28...Guide pin, 24...Elongated hole, 25...
・Concave part, 26...Guide roller, 27...Lead post, 28...Capstan, 29...Control spatula)', 80...Post, 81...Cylinder,
82...Erasing head, 8B...Tension post,
84...Pinch roller, 84'...Lock pin, 8
5...Lock lever 185'...Press arm, 86
...Pin 50...Piezoelectric motor, 51...Elastic body, 52...
Piezoelectric element, 58... Felt, 54... Base, 55
...Clutch plate, 56...Drive plate, 58...Rotating body, 59.60.61.62.6B, 64...Gear thread 1 Figure 2 LOL 3 Figure 4 Light 4 Figure P2 Kabuto Figure 5, Illustration 6, Illustration 9, Figure 9.

Claims (1)

[Claims] A ring-shaped rotating body is pressed into contact with a ring-shaped elastic body fixed to a ring-shaped piezoelectric element, and traveling wave vibration in the ring circumferential direction is generated on the surface of the elastic body by an AC voltage applied to the piezoelectric element. a ring-shaped piezoelectric motor for driving the rotating body, a cylinder having a magnetic head is provided inside the ring of the piezoelectric motor, and a mechanism for pulling out a magnetic tape from a tape cassette and mounting it on the cylinder. A magnetic recording and reproducing device characterized in that the rotating body driven by the piezoelectric motor drives and feeds the magnetic tape.