JPS5842543B2 - Rokuon Saiseiki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording/playback device characterized in that a sensitive element such as a recording/playback head is instantly returned to a starting position.

For example, it is already known that heads are used in magnetic recording/playback devices, etc., which perform the function of converting magnetic energy and electrical energy.

Such devices usually use a sheet on which a magnetic surface is formed, and perform recording or reproducing operations by moving the head along the magnetic surface while in contact with the sheet.

Here, for example, if the magnetic track formed on the sheet is spiral-shaped, the head provided on the turntable is moved in the radial direction of the turntable, and
It is sufficient to rotate the turntable, and as a result, the head is given a spiral motion corresponding to the above-mentioned magnetic track.

In this case, the head moves from the start position to the end position in the radial direction of the turntable, and when it reaches this end position, the recording or playback operation ends.

By the way, if you want to stop the recording/playback operation in the middle of the recording/playback device and want to repeatedly listen to only the necessary part of the recorded audio, it is possible to shorten the waiting time as much as possible. However, it is important to instantly return the head to the starting position so as not to require much mechanical operation time.

In view of the above-mentioned points, an object of the present invention is to provide a function that instantly returns a sensing element such as a head from an intermediate position to a starting position, and to repeatedly perform the above-mentioned recording and playback operation with an extremely simple operation. The purpose of this invention is to provide a recording/playback device that can be used in a variety of ways.

The present invention will be explained below with reference to an illustrated embodiment.

FIG. 1 shows a recording and reproducing machine according to an embodiment of the present invention, in which a sheet 3 is fixed on a top plate 2 of a main body 1, and this sheet The two alignment holes are held in the correct position on the top plate 2 by fitting into the ruler pins 4 and the shafts 5 on the top plate 2.

A transparent presser plate 6 is hinged at one side edge of the main body 1 and presses the sheet 3 onto the top plate 2.

A circular hole is bored in the top plate 2, and a decorative plate 7 that is substantially integrated with a turntable, which will be described later, is provided inside the circular hole.

A groove 8 is cut in the decorative plate 7 in the radial direction, and a head 9 is provided within the groove 8.

The head 9 rotates together with the turntable, and during this rotational movement, the head 9 is gradually moved toward the outer periphery of the turntable by a feed screw, which will be described later.

As a result, the head 9 performs a spiral movement outward from the center, thereby performing a recording/reproducing operation.

In FIG. 2, the turntable 11 is rotatable around a shaft 5, and is driven to rotate in the direction of arrow A (see FIG. 4) via a belt 12 by a drive motor (not shown). .

The decorative board 7 and the turntable 11 are connected to each other by a support 13 and are substantially integrated.
is designed to rotate together with the turntable in the direction of arrow A, as shown in FIG.

As shown in FIG. 3, a bent portion 16a is formed at the free end of the control member 16 whose base is pivotally connected to the shaft 15 of the support plate 14, and extends upward from the upper edge of the tip thereof. An operation button 17 is attached to the raised piece 16b so as to protrude from the top plate 2 (see FIG. 1).

A circular hole 16d is formed in the disk portion 16c formed in the control member 16.
(See FIG. 3), and a support 18 for supporting the turntable 11 is located at the center of this circular hole 16d.

The control member 16 is given the tendency to rotate to the left around the axis 15 by the relatively strong elasticity of the tension spring 19;
This behavior is prevented by the lower flange portion 17a of the operation button 17 coming into contact with the lower surface of the top plate 2 of the main body.

Further, a protruding piece 16e is formed on the lower edge of the tip side of the bent portion 16a of the control member 16, and when the operation button 17 is pushed against the elasticity of the spring 19 by the action described later, the protruding piece 16e The piece 16e comes into contact with the lower substrate 1a of the main body 1.

In FIG. 4, the rising parts 21 a and 22 of the holding plate 21 and 22 fixed to the bottom plate 11 a of the turntable 11
Two guide shafts 23 and 24 are attached in parallel to a.

One guide shaft 24 includes a feed screw 25 as a feed member;
Cam 26 and helical gear 27 are mounted substantially integrally.

Another helical gear 28 that meshes with the helical gear 27 is
The turntable 1 is fixed to a cylindrical body 29 that is substantially integral with the shaft 5 fixed to the lower substrate 1a (see FIG. 2).
1 rotates around the axis 5 in the direction of arrow A, the helical gear 27 meshing with the stationary helical gear 28 rotates in the direction of arrow B.
It is designed to rotate in the direction.

The holding member 31 is formed with rising portions 31a, 31b, and 31c, and a shaft 32 is rotatably mounted on the rising portions 31a facing each other.

The base of a head support member 33 having a head 9 attached to its free end is fixed to the shaft 32, and the support member 33 includes:
The head 9 is rotated in the upward direction by the elasticity of a spring 36 which is wound around the shaft 32 and whose one end is secured to the screw 35 of the fixing member 34 which is substantially integral with the shaft 32 and whose other end is secured to the rising portion 31a. given the ability to move.

This rotational behavior is prevented by the immovable pin 37,
In this state, the head 9 is held in the position shown in FIG.

The guide shaft 23 has mutually opposing rising portions 3 of the holding member 31.
1b is loosely inserted, and the notch of the rising portion 31G is fitted into the other guide shaft 24.

That is, the holding member 31 is capable of sliding on both guide shafts 23 and 24, and has one end connected to a pin 38 implanted in the holding member 31, and the other end connected to the bottom plate 11a of the turntable 11. The head 9 and the head support member 33 are respectively locked to pins 39 implanted in the head 9, and the sliding behavior to the right is caused by the elasticity of a tension spring 41 for returning the head 9 and the head support member 33 to their original positions by the action described later. Along with being given,
This behavior is prevented by a stopper 21b provided on the holding plate 21.

A bent piece 42a formed on the base side of the actuating member 42 is held by the rising portion 31b of the holding member 31, and is rotatably attached to the guide shaft 23.

A control pin 43 is fixed to an operating piece 42b bent downward at the free end of the operating member 42.

The actuating member 42 is wound around the guide shaft 23, and its free end is given a downward rotational tendency by the elasticity of a spring 44, which is latched at one end to the holding member 31 and at the other end to the actuating member 42. This behavior is caused by actuating piece 4.
2b passes through the elongated hole 11b bored in the bottom plate 11a of the turntable 11, and as shown in FIG.
This is prevented by contacting the disk portion 16C.

In addition, in FIG. 4, an engager, for example, a half nut 45 having a threaded portion 45a as shown in FIG. They are facing each other.

The restraint lever 46 is pivotally connected to a shaft 48 of a support plate 47,
The lever 46 is wound around a shaft 48 and has one end attached to the lever 46.
The elasticity of the springs 49, whose other ends are respectively locked to the support plate 47, gives the free ends the ability to rotate in the downward direction. is prevented by contacting the

From the upper edge of the free end side of the restraint lever 46, there is a control piece 46a that engages with the control pin 43 in accordance with the action described later.
extends toward the actuating piece 42b of the actuating member 42.

The embodiment of the present invention is constructed as described above, and its operation will be described next.

First, as shown in FIG. 1, the sheet 3 is placed in a fixed position on the top plate 2, and the presser plate 6 is placed over it.

When the operation button 17 is pressed down, the contacts of the switch body (not shown) are closed and the drive motor is rotated, whereby the turntable 11 starts rotating in the direction of arrow A together with the decorative plate 7. At the same time, the head 9 moves from the starting position shown by the solid line to the ending position shown by the imaginary line in FIG. There is.

That is, in response to the pressing operation of the operation button 17 described above, the control member 16 rotates to the left around the shaft 15 via the spring 19 until the protruding piece 16e comes into contact with the lower substrate 1a, and at the same time, the control member 16 rotates to the left around the shaft 15 via the spring 19, and at the same time, the disc part 16c ( (see Figure 3) descends.

Following this movement, the actuating piece 42b which is in contact with the disk portion 16c also descends due to the elasticity of the spring 44 in FIG.

That is, the actuating member 42 has the control pin 4 around the guide shaft 23.
3 rotates in the downward direction.

Then, as shown in FIG. 6, the control pin 43, which was normally held at position a, is lowered to position b.

In FIG. 4, as the actuating member 42 rotates, the threaded portion 45a of the half nut 45, which had been opposed to it at a distant position, engages with the feed screw 25, and the actuating piece 42b engages with the disc portion 16c of the control lever 16. (See Figure 3).

When the half nut 45 engages with the feed screw 25 as described above, the actuating member 42 slides leftward on the guide shaft 23 by the feed action of the screw 25, which rotates in the direction of arrow B.

Further, the actuating piece 42b of the actuating member 42 rotates above the disk portion 16C of the control member 16 in the direction of the arrow (see FIG. 3).
.

Along with the above-mentioned sliding movement of the actuating member 42, the holding member 31 also slides to the left on both guide shafts 23, 24, and the head 9 also slides into the groove 8 (see FIG. 1) via the head support member 33. ) gradually move outward along the

Further, as shown in FIG. 6, as the actuating member 42 slides, its control pin 43 moves from position b in the horizontal direction indicated by the arrow ν, and the control piece 43 of the restraining lever 46
While pushing a slightly upward, c1 shown in Figure 7
reach the position.

Here, the above-mentioned control pin 43.

When the operating button 17 is released from the 1st position, that is, in the middle of a recording or playback operation, the control member 16 moves downward around the shaft 15 due to the elasticity of the spring 19 in FIG. The flange portion 17a rotates until it comes into contact with the lower surface of the top plate 2.

At this time, as shown in FIG.
Activates: Pushes up the moving piece 42b.

Furthermore, in FIG. 7, the control pin 43 is from cl to C:2.
position, the control piece 46a is pushed from the solid line to the position shown by the chain line, and the restraint lever 46 is pivoted significantly counterclockwise around the shaft 48 in FIG.

That is, the push-up action of the actuating piece 42b by the disk portion 16c is performed against the elasticity of the two springs 44, 49, and the elasticity of the spring 19 of the control member 16 is stronger than the total elasticity of both springs. It has become a thing.

By the way, when the above-mentioned actuating piece 42b is pushed up by the disk portion 16c, the actuating member 42 turns around the shaft 23 in FIG. The operation is canceled and the head 9 is stopped, and the holding member 31 and the operating member 42 are instantly pulled back to their original positions by the elasticity of the spring 41 due to the above-mentioned canceling operation, and at the same time, the head 9 is also returned to the starting position via the head support member. Return to.

Note that when the locking operation of the half nut 45 is released,
Until the actuating member 42 returns to its original position, the actuating piece 42b moves while contacting the disc portion 16c as shown in FIG. 3, so that the above-described release operation is maintained.

During this time, the control pin 43 of the actuating member 42 in FIG.
Return to the original position shown in Figure 4.

In this way, the head 9 can instantly return from this intermediate position to the starting position by simply releasing the pressing operation of the operation button 17, so that necessary parts of the recorded audio can be repeated. This is extremely effective when you want to listen further.

In this embodiment, it is also possible for the magnetic head 9 to return to its terminal position, and this is accomplished as follows.

That is, as described above in FIG. 6, when the operation button 17 is pressed down, the control pin 43 descends from position a to position b, and at the same time, the feeding of the magnetic head 9 is started, and the control pin 43 is moved from position b as indicated by the arrow. Move horizontally, control piece 4
Push 6a upward until it reaches position d.

At this time, the magnetic head 9, which has completed the recording/reproducing operation, also reaches the terminal position (the position indicated by the imaginary line in FIG. 2).

At the same time, as shown in FIG.
2c is pushed up by the cam 26, the half nut 45 is separated from the feed screw 25, and the control pin 43 is also pushed up by the cam 26.
Displaced from to position e.

Then, at the moment when the half nut 45 and the feed screw 25 are disengaged from each other, the control pin 43 is displaced from position e to position f by the elasticity of the spring 41, and the operation button 17 remains pressed down. moves from f to the upper surface of the control piece 46a by the action of both springs 4L44, g,
The head 9 returns to the starting position after passing through the h position and reaches the b position, and the half nut 45 engages with the head 9.
transmission is started again.

That is, the recording/reproducing operation can be repeated thereafter.

Furthermore, when the first recording/playback operation is completed and the pressing operation of the operation button 17 is released, the disk portion 16c (see FIG. 3) of the control member 16 is in a raised position. The control pin 43 moves back from f to position a.

In the above-described embodiment, a feed screw was used as a means for feeding the magnetic head 9, that is, as a feeding member, but the present invention is not limited to this, and the following means may also be used.

In FIG. 8, a disk body 55 having a spiral guide groove 55a with a V-shaped cross section on its upper surface is substantially integrally attached to the immovable shaft 5 (see FIG. 2).

Further, a piece 5 protrudes from one side edge of the free end portion of the actuating member 56.
6a, and the distal end portion 56C of the bent piece bent downward from the protruding piece 56a is formed into an acute angle shape to function as a so-called guide needle.

That is, as described above, when the operating button 17 is pressed down, the operating member 56 rotates around the guide shaft 23 in the direction in which the free end descends, and this causes the tip 56C to move as shown in FIG. The guide groove 55a is engaged with the starting position of the guide groove 55a.

At the same time, the actuating member 56 is guided by the guide shaft 23 and sent in the direction of the arrow by the rotational action of the turntable 11 in the direction of the arrow A (see FIG. 4), and the magnetic head 9 also begins to move from the starting position.

When the pressing operation of the operating button 17 is released in the middle of the recording/playback operation, the operating piece 56b is pushed up via the control member 16 (see FIG. 3), and along with this, the tip portion 5
6c leaves the guide groove 55a at an intermediate position.

By this detachment operation, the actuating member 56 is pulled by the spring 41 (see FIG. 4) and returns to its original position, and the magnetic head 9 also returns to its starting position.

The movement of the control pin 57 of the actuating member 56 at this time is performed in exactly the same manner as in the previous embodiment.

(See Figure 7).

Further, in the return operation at the end position, the pin 56d implanted in the bent piece of the actuating member 56 rides on the top 58b from the side edge 58a of the feed release cam 58 provided on the disk body 55, and the tip 56C This is done by leaving the end position of the guide groove 55a.

In this case as well, the movement of the control pin 57 is performed in exactly the same manner as in the previous embodiment.

(See Figure 6). Next, another embodiment of the present invention will be described.

That is, in FIG. 10, a spiral guide groove 61 with a V-shaped cross section is provided in a disk portion 59a formed on one end side of a feed lever 59 as a feed member, and a spiral guide groove 61 is provided in the disk portion 59a. As shown in FIG. 2, a support 18 for supporting the turntable 11 is located in the center of the round hole 59b.

That is, the feed lever 59 is connected to the control member 16 shown in FIG.
It has a similar arrangement.

The feed lever 59 is a support member 6 fixed to the lower substrate 1a.
The lever 59 is pivotally connected to the shaft 62a of the lever 59.
The elastic force of a spring 63, which is wound around the shaft 62a and whose one end is latched to the lever 59 and the other end is latched to the lower substrate 1a, gives it the tendency to rotate to the left about an axis 62a in FIG.

The feed lever 59 is normally placed in the position shown by the solid line in FIG. is held in contact with the lower surface of the top plate 2 via springs 63.

In FIG. 12, a downwardly bent bent piece 65a is formed at the free end of an actuating lever 65 whose base is pivotally connected to the guide shaft 23, similar to the actuating member 42 shown in FIG. This bent piece 65a is provided with a control pin 66 that engages with a control piece 46a (see FIG. 4), which will be described later.
A protrusion 65b is formed on the lower edge of this.

This protrusion 65b corresponds to the spring 44 of the above embodiment (see FIG. 4).
As shown in FIG. 13, the spring 67 is configured in exactly the same manner as shown in FIG.

A hanging arm 65C is formed on one side edge of the operating lever 65, and this arm passes through a long hole 11c (see FIG. 11) bored in the bottom plate 11a along the axial direction of the guide shaft 23.

A pin 68 is implanted in the hanging arm 65c, and its tip 65d is formed into an acute angle, and functions as a so-called guide needle.

Here, in FIG. 11, the operation button 17 is pressed against the lower board 1 by the protruding piece 59d of the feed lever 59 against the elasticity of the spring 63.
When the lever 59 is pushed down until it touches the shaft 62
The turntable 1 rotates to the right around point a from the solid line to the position shown by the chain line, and the contacts of the switch body 69 are closed accordingly.
1 starts rotating in the direction of arrow A (see Figure 4).

Further, the disk portion 5 is rotated by the clockwise rotation movement of the feed lever 59.
9a is held in a horizontal position, and together with this, the disk portion 59a
The starting point of the guide groove 61 is the tip 65 of the actuating lever 65.
d.

At this time, the hanging arm 65C is slightly pushed up.

That is, in FIG. 13, the protrusion 65d of the operating lever 65 is slightly separated from the bottom plate 11a, as shown by the imaginary line.

In this state, the operating lever 65 moves in the direction of the arrow due to the rotation of the turntable 11.

At the same time, the magnetic head 9 shown in FIG. 4 is also sent from the starting position to the final position via the holding member 31 and head supporting member 33.

Here, in FIG. 11, when the pressing operation of the operation button 17 is released in the middle of the recording/playback operation, the feed lever 59
The spring 63 pivots from the chain line to the position shown by the solid line due to the elasticity of the spring 63.

As a result, at an intermediate position of the guide groove 61, the engagement state between the guide groove 61 and the tip end 65d of the actuating lever 65 is released, and the protrusion 65b shown in FIG. 13 comes into contact with the bottom plate 11a again.

At the same time, the operating lever 65 in FIG. 12 is pulled by the spring 41 and returns to its original position as shown in FIG.
Further, the magnetic head 9 also instantaneously returns to the starting position via the holding member 31 and the head supporting member 33.

When the operating lever 65 returns, the protrusion 65b thereof moves while contacting the bottom plate 11a as described above, and therefore the tip 65d is prevented from descending any further, so that the magnetic head 9 is not activated. Unless the operation button 17 is operated while returning to the position, the tip 65d will return to the guide groove 61.
It is impossible for anything to happen that would involve the .

In short, as a result, the release and holding action of the tip portion 61d with respect to the guide groove 61 is performed by the above-mentioned lowering prevention action by the protrusion 65b and the retracting action of the feed lever 59 by the spring 63 (see FIG. 11).

The movement of the control pin 66 shown in FIG. 13 in conjunction with the above-mentioned movement and return operation of the operating lever 65 is as follows.

That is, the control pin 66, which is normally placed at position a in FIG. 14, is connected to the guide groove 65 of the feed lever 59 (
(see FIG. 11), and is displaced to position b.

Then, the control pin 66 moves to the C1 position by the feeding action of the guide groove 61, and by releasing the pressing operation of the operation button 17 from this intermediate position, the control pin 66 descends from .cl to the C2 position.

That is, the protrusion 65b in FIG. 13 comes into contact with the bottom plate 11a again.

Furthermore, the control pin 66 returns from c2 to the a position due to the return operation of the operating lever 65 to its original position.

The above has described the return operation of the magnetic head 9 at an intermediate position, but the return operation is also possible at the end position, and this is carried out as follows.

That is, as described above in FIG. 11, the feeding of the magnetic head 9 is started when the operation button 17 is pressed down, but at this time, the movement of the magnetic head 9 is started in the direction of the arrow of the operating lever 65 (see FIG. 13).
With the movement of the control piece 46 of the restraining lever 46,
a (see FIG. 4) in a position as shown in FIG. 13, that is,
The control pin 66 of the actuating lever 65, placed in position a in FIG. 15, rises to position b and from this position to position d.

When the pin 66 moves from position b to position d, the control piece 46a is pushed up a little, causing the restraining lever 46 to pivot slightly.

Then, the recording and reproducing operation is ended with the control pin 66 reaching the d position.

That is, when the magnetic head 9 reaches the final position, the pin 68 of the operating lever 65 shown in FIG. 64a to the top 64b, and at the same time, the operating lever 65 shown in FIG.
The engagement with the guide groove 61 provided in the disk portion 59a is released.

At this time, the control pin 66 of the operating lever 65 is displaced from the position d to the e position, and at the same time the above-mentioned engagement operation is released, the spring 41 (see Fig. 4) and the spring 67 (see Fig. 12)
While contacting the upper surface of the control piece 46a, the magnetic head 9 moves from f to position g, h, and b to position a, and at this time, the magnetic head 9 returns to the starting position and the tip of the operating lever 65 shown in FIG. The portion 65d again engages with the guide groove 61 of the feed lever 59 shown in FIG. 10, and feeding of the magnetic head 9 is started and the above-described operation can be repeated thereafter.

That is, by keeping the operation button 17 pressed, the recording and reproducing operation can be repeated by repeating the above-mentioned operation.

In addition, if the recording and playback operation is to be performed only once, the control pin 66 is moved from position a to position b and d as shown in FIG.
When the position is reached, that is, when the recording and playback operation is finished,
It is sufficient to release the pressing operation of the operation button 17 shown in FIG. 10, and the engagement between the tip 65d of the operating lever 65 shown in FIG. Protrusion 65b of actuation lever 65 shown in the figure
contacts the bottom plate 11a again.

That is, the control pin 66 is lowered from d to the d7 position, and the spring 4
1 (see Figure 4) returns to position a.

At this time, the magnetic head 9 also returns to the starting position.

Note that if the pressing operation of the operation button 17 is released after a short period of time after the control pin 66 reaches the d position, the first
Since the pin 68 of the operating lever 65 in FIG. 2 rides on the top 64b of the feed release cam 64 in FIG. 10, the control pin 66 moves along the upper surface of the control piece 46a, and
It reaches position a via position b.

As described above, also in this embodiment, the magnetic head can be instantly returned to the starting position.

In addition, in FIG. 11, the disk portion 59a of the feed lever 59
Although the guide groove 61 is formed directly on the disk, the guide groove 61 is not limited to this, and the guide groove may be provided on an independent disk and attached to the disk portion.
As shown in FIG. 16, a disk 70 provided with a guide groove is attached to the disk portion 60a of the feed lever 60 so as not to rotate, and a bushing 70a having a spherical outer circumference is fitted into the disk 70. The disk 70 may be made to swing freely using the guide 70a, and this accurate positioning of the disk has the effect of reliably preventing problems such as track misalignment.

Next, as shown in FIG. 17, by providing two recording and reproducing sections each consisting of a turntable, a magnetic head, a return device for these, etc. in each of the above-described embodiments, it is possible to function as a so-called LL device. can.

That is, two turntables (not shown) are provided in the outer box body 71 of the recording/playback device, and decorative plates 72 and 73 that are substantially integrated with the turntables are adapted to rotate in the directions of the arrows. ing.

When the operating button 76 is pressed, the magnetic head 74 on the decorative plate 72 performs a spiral motion in the same direction as in the embodiment described above, and returns from its midway position or end position to the starting position.

Further, the turntable on the side of the decorative plate 73 is configured to rotate in the opposite direction to that in the previous embodiment, so that the magnetic head 75 performs a spiral motion in the opposite direction to the head 74. .

Note that numerals 77, 78, and 79 indicate a built-in microphone, an earphone jack, and an external microphone jack, respectively.

On the other hand, in FIG. 18, a magnetic track 86 is formed on one side of the back side of the sheet 85, on which the voice of a voice master, for example, a teacher, is pre-recorded, and a magnetic track 87 for student recording is formed on the other side. It is now possible to do so.

Here, the sheet 85 is placed on the top plate using the shafts 83 and 84 as guides.

Then, when the presser plate 82 is covered and the operation button 76 is pressed down, the magnetic heads 74 and 75 each start a spiral movement, and at the same time the teacher's voice is played back through the earphones, the learner's voice is recorded through the built-in microphone 79.
A magnetic track 87 is formed as shown in FIG.

Next, changeover switch 81 is switched in the direction of the arrow.

That is, this changeover switch 81 is for changing the mode, and by switching it in the direction of the arrow, only the recorded voice of the learner is played back.

Therefore, it is possible to repeatedly learn foreign languages, etc. while comparing with the audio master.

Although the two turntables are shown rotating in opposite directions in FIG. 17, they are not limited to this, and may be rotated in the same direction. In this case, the two turntables shown in FIG. The two magnetic tracks of the sheet 85 have the same spiral direction.

As described above, according to the present invention, recording and playback operations can be performed with an extremely simple operation, which is equipped with a function that instantly returns a sensing element such as a head from an intermediate position to a starting position by releasing the press of an operation button. It is possible to provide a recording/playback device that can be used repeatedly.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a recording/playback device showing an embodiment of the present invention, FIG. 2 is a front sectional view showing a peripheral mechanism of the turntable of the recording/playback device, and FIG. 3 is a perspective view of essential parts of a control member. Figure 4 is a perspective view showing the head movement return mechanism provided in the turntable, Figure 5 is an enlarged perspective view of the half nut,
6 and 7 are diagrams for explaining the movement of the control pin with respect to the control piece of the restraint lever, FIG. 8 is a perspective view showing another embodiment of the head feeding mechanism, and FIG. 9 is the main part of the same as above. 10 is a perspective view of a feed lever used in another embodiment of the head feed means, FIG. 11 is a front partial sectional view showing another embodiment of the head feed stop means, and FIG. 12 is a perspective view of a feed lever used in another embodiment of the head feed means. FIG. 13 is a front view showing the positional relationship of the actuating lever with respect to the control piece of the restraint lever, and FIGS. A diagram for explaining the movement of the control pin of the operating lever, FIG. 16 is a partial cross-sectional view showing another embodiment of the feed lever, and FIG. 17 is a recording/playback machine with two recording/playback sections. FIG. 18 is a perspective view showing an example of a sheet used in the recording/reproducing machine. 9...Sensing element, 11...Turntable, 17...Operation button, 25, 55, 59...
...Feeding member, 33... Sensing element support member, 41... Sensing element supporting member return spring, 45
, 56c, 65d... Engagement element.

Claims (1)

[Claims] 1. A sensing element provided on a rotatable turntable, a sensing element support member for supporting the sensing element, a feeding member for feeding the sensing element from a starting position to a terminal position, and an engaging element that is freely engageable and detachable from the feeding member and that moves the sensing element from the starting position when engaged; an operating button; and when the operating button is pressed, the engaging element is engaged with the feeding member and the sensing element is moved. means for moving the sensing element from the starting position; and means for releasing the engaging operation by releasing the pressing of the operating button when the sensing element moves to an intermediate position between the starting position and the final position; A recording and reproducing section is provided, which includes means for holding the release operation until the sensing element returns from the halfway position to the starting position, and a spring for returning the sensing element support member to perform the returning operation. A recording/playback machine featuring: 2. The recording and reproducing machine according to claim 1, which includes two of the recording and reproducing sections and has means for making these recording and reproducing sections function independently of each other.