KR870002045Y1 - Automatic feedback machine of record player - Google Patents

Abstract

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Description

Record Player Auto-Return Mechanism

1 is a plan view showing an automatic return mechanism of a conventional record player.

2 to 4 are plan views showing one embodiment of the present invention.

2 is a state when the record player is not used.

3 is a state where the end of the needle enters the silent sound after the record is not too far away.

4 is a state diagram when the tow arm starts to move toward the rear of the player.

* Explanation of symbols for main parts of the drawings

21: new arm 22-25: pickup assembly

24: Detection reverse click 27: Detection lever

30, 31: starter plate 31b: projection

32: turntable shaft gear 32a: return table side

32b: Click on the gear shaft gear 33: Drive gear

34: cap 35: return lever

This article relates to an automatic return mechanism of a record player, and more particularly, to an automatic return mechanism capable of storing a tow arm at the rear of the record player after the end of recording.

In the conventional automatic return mechanism, the tow arm is generally performed in a repetitive operation of playing from the outer periphery of the record inward to returning to the original position on the right side of the record after the end thereof.

Shown in FIG. 1 is an example of this kind of mechanism, which will be described next. In the same figure, 1 is a towing arm, 2 is a pick-up plate, and is fixed to the rotating part which supports the tow arm 1.

1b is its axis of rotation. 3 is the pickup plate pin and is mounted on the pickup plate. 4 is an automatic starting lever, the rotation of which is guided to the guide pin 4b by connecting with the pickup plate 2 by the pin 2b.

5 is a starter plate, the rotation of which is freely attached to the return drive gear 8 by a pin 6a with a starter plate 6 attached thereto.

7 is a turntable shaft gear, and 7a is a click.

Gear 7 and gear 8 are engaged, and 8b is the axis of rotation of gear 8.

The cam 9 is provided in the return drive gear 8.

10 is an arm return lever, whose pin 11 is guided by the cam 9, the lever 10 is guided in a constant direction and its tip presses the pick-up plate pin 3. And 12 is a record.

Next, the operation will be described. Assume that the tow arm 1 is placed on the record 12, and the performance progresses, and the tow arm 1 moves to the position 1a (indicated by the dashed line). At this time, the pick-up plate 2 moves to the position (dashed line) of 2a, and the automatic start lever 4 moves to the position (dashed line) of 4a. Therefore, the tip of the automatic starting lever 4 pushes one end of the starting plate 5, and the starting plate 5 rotates in the direction of the arrow 5a, whereby the starting plate 6 also rotates in the same manner.

When the turntable shaft gear 7 which is constantly rotating is approached by this minute rotational motion and the recording is finished, the starter plate 6 is engaged with the click 7b of the gear 7 at the same time. The return drive gear 8 is then pushed by the gear 7 which rotates through the starter plate 6 to rotate in the direction of the arrow 8a and the gear 8 is engaged with the gear 7. Since the turntable shaft gear 7 continues to rotate constantly, the return drive gear 8 follows this and continues to rotate further.

Then, the arm return lever 10 moves in the direction of the arrow 10a by the cam 9 and the arm return lever pin 11, and its tip presses the pick-up plate pin 3 at the position (dashed line) of 3a. do. The arm return lever 10 moves in the direction of the arrow 10a until the return drive gear 8 is rotated 180 degrees from the start.

In this way, the pick-up plate pin 3 returns to the original position (solid line) from the position (dashed line) of 3a.

As a result, the pick-up plate 2 returns to its original position, and the towing arm 1 fixed thereto is raised vertically after the end of the performance to return to the original position.

In this way, when the record performance is completed, the mechanism in which the tow arm 1 returns to the outside of the right side of the record is conventional. Incidentally, in the above-described example, the pickup plate 2 and the automatic starting lever 4 are connected, but in some cases, the pick plate 2 and the auto start lever 4 are moved in contact with each other.

As described above, in the configuration employing the conventional automatic return mechanism, the tow arm is vertically stored on the right side of the record, so that the width of the toe is wide. Therefore, this can not be realized even if the width is made small as needed to obtain a compact configuration.

This paper aims to reduce the width of the entire record player as an automatic return mechanism capable of storing the new arm at the rear of the record, that is, at the rear of the record player. This paper improves the structure of the pickup plate fixed to the support rotation part of the tow arm in the automatic return mechanism of the record player as a means to solve the above problem. The record player is automatically returned to the tow arm after the record is played. It is an automatic return mechanism that can rotate in the rear part of the.

Next, the present invention will be described according to the embodiment.

2 to 4 are plan views showing one embodiment of the present invention, and FIG. 2 is a state diagram when the record player is not used, and FIG. 3 shows that the end of the record is not far away and the needle tip enters the silent groove. 4 is a plan view showing a state when the tow arm starts to move toward the rear of the player.

In FIG. 2, 21 is a towing arm and shows the state (arm stop) accommodated in the rear part of a record player. 21a is a rotation axis. 22 to 25 are pick-up plate assemblies, and 22 is fixed to the support rotation part of the tow arm 21 as the pick-up plate. The detection inversion click 24 provided thereon is inverted by the inversion spring 25.

The position of the figure is the position in the state which does not use the player. 23 is a linear main part of the plate 22 and makes contact with the contact 37a of the power switch 37. However, when the contact drops, the switch turns ON and the turntable rotates.

26 is installed in the player main body as the detection inversion click guide, and the tow arm 21 moves in the direction of the arrow 21a while the player is in use, and the pick-up plate assemblies 22 to 25 move together to reverse. In contact with the click guide 26, the reverse click 24 is inverted by the action of the spring 25, and is shown in FIG. 3 and FIG.

27 is freely supported by the pin 27a as a detection lever, has a detection lever pin 28, and is engaged with the inverted click 24 (see FIG. 3). 29 denotes a pin and restricts the rotation of the detection lever 27 to a certain range.

30 and 31 are comprised by a pair as a starting board, and rotation is attached to the drive gear 33 freely by the pin 31a.

The tip 27b of the detection lever 27 is in contact with the starter plate 30 and the projection 31b of the starter plate 31 can engage with the click portion 32b of the turntable shaft gear 32. .

32a is the turntable axis, and 35a is the axis of the drive gear 33. 34 is a cam and is installed in the drive gear 33 to move the return lever 35 in the direction of the arrow 35d in accordance with the displacement of the cam 34 by the rotation of the drive gear 33.

The return lever 35 has a guide pin 36 for the cam 34 and its direction is regulated by the pins 35a and 35b.

The return lever 35 has a stepped portion 35c to move the position of the power switch 37. The switch 37 is provided on the power switch arm 37b which rotates about the axis 37d, and the power switch arm is rotated clockwise by a spring 38 spanned between the pin 35b and the pin 37c. A force is applied to rotate in the direction and the pin 37c is in contact with the slide lever 35. Thus, in the state of FIG. 2 in which the record player is stopped, the power switch 37 and the contact 37a are linear to the plate 22 because the pin 37c is in contact with the end 35c of the slide lever 35. The power switch is turned off in contact with the outer circumferential portion 23.

Next, the operation will be described. First, as shown in FIG. 2, the record 12 is placed on a turntable (not shown), and the toe arm 21 is rotated to the outer periphery of the record in the direction of the arrow 21a.

Since the pick-up plate assemblies 22 to 25 are fixed to the supporting rotation part of the towing arm 21, they are moved in the same manner, and the linear driving part 23 of the plate 22 moves the power switch 37 and the contact 37a. At the time when the needle tip of the towing arm 21 passes through the silent groove 12a, the contact 37a of the power switch is separated from the linear outer periphery 23 of the plate and the switch is turned on so that the turntable starts to rotate. do. In addition, when the needle tip passes through the groove 12a, the detection inversion click 24 provided on the plate 22 is connected to the inversion guide click 26 and inverted to the position shown in FIG. 3 and FIG. do.

The toe arm needle tip is lowered to the record groove to start playing and track the sound groove, and close to the silent groove and enter the silent groove soon.

3 shows the state at this time.

Inverted detection inverted click 24 in the same figure is engaged with pin 28 in detection lever 27, and inverted click 24 and lever pin 28 are respectively indicated by arrows 24a and 24b. Move in the direction of.

Accordingly, the tip 27b of the detection lever 27 rotates the starter plate 230 and the starter plate 31 downward, and the protrusion 31b is engaged with the turntable shaft gear click 32b.

In the meantime, the needle tip of the towing arm 21 moves further to reach the final groove (silent groove) of the record, and the starter plate 31 is pushed in the right direction by the rotation of the turntable shaft gear click 32b. The drive gear 33 starts to rotate in the direction of the arrow 33a because it rotates and is engaged in contact with the drive gear 33 and the turntable shaft gear 32 and the turntable shaft gear 32 is rotating upward.

Then, the cam 4, which is recessed on the rear side of the drive gear 33, is also rotated and displaced, and the return lever 35 moves in the direction of the arrow 35d shown in FIG. 4, and its tip 35c is moved to the pickup plate. It contacts with the pin 22a in 22, and presses it. (See Figure 4)

At this time, since the pin 3c7 of the power switch arm 37b moves from the stepped portion 35c of the return lever 35, the power switch arm 37b rotates in the counterclockwise direction about the axis 37d to supply power. The switch 37 is kept in the on state.

Here, when the cam 34 rotates α = 200 ° from the starting point, the pick-up plate 22 is completely pushed out to move the tow arm 21 to the rear arm stop position so that the linear outer circumferential portion 23 contacts the power switch 37a. The power supply is kept on because the power switch 37 is rotated in the counterclockwise direction because the power supply switch 37 is returned to the position opposite to the direction.

In addition, as the cam 34 rotates β = 160 °, as shown in FIG. 4, the pin 37c returns to the stepped portion 35c of the slide lever, so that the contact portion 37a of the linear outer circumference 23 and the power switch are separated. ) Becomes the position shown in Fig. 2, and the power is cut off again.

In this way, the pick-up assemblies 22 to 25 can be returned to their original positions, and thus, the support rotating part of the tow arm 21 fixed thereto is also returned to its original position, and the tow arm 21 which has finished playing is vertically raised. After the rotation, it is possible to return to the original position.

In addition, with regard to this switch mechanism, the linear outer periphery 23 of the pick-up plate is arranged so that the turntable does not rotate until the tow arm 21 passes through the center of the turntable and comes outside the silent groove, away from the arm stop of the tow arm 21. ) Is composed.

This is to prevent the needle tip from coming in contact with the record rotation in a state where the needle tip is in contact with the record rotation when the turntable rotates when the tow arm 21 is separated from the arm stop.

The moment the cam 34 rotates 200 ° and the linear outer circumference 23 passes the contact 37a of the power switch, the switch is turned off for 0.165 seconds (1/2 turn on the turntable side) in this embodiment, but the drive cam According to the shape of the 34 and the power switch arm 37b, the position of the switch lever pin 37c in contact with the return lever 35, and the shape of the linear outer peripheral portion 23 of the pickup plate, the power switch 37 One is enough (see also Figure 4).

When the pick-up plate 22 described above is returned, the detection lever 27 is regulated to a certain range of rotational days by the action of the pin 29, so that the detection reverse click 25 acts as the inversion spring 25. As a result, the plate 22 can rotate without departing from the detection lever pin 28 and being restricted by the detection lever 27. In addition, when the projection 31b of the starting plate engages with the turntable shaft gear click 32b and the drive gear 33 starts to rotate, the starting plates 30 and 31 are broken lines 30a and 31c shown in FIG. ) Can be rotated without disturbing the detection lever 28.

This paper has the same structure and operation as described above, and by improving the structure of the pick-up plate fixed to the support rotation part of the tow arm, the tow arm can be stored in the rear of the record player by automatic return after the record performance. . This can reduce the width of the record player to the size of the record.

In addition, since the rear portion of the towing arm is stored by the improvement of the mechanism, it is possible to have one driving motor, and the power switch can be finished with one as described above. In addition, if the tow arm is not brought from the center of the turntable to the outside (end of the groove), the power of the turntable does not enter. Therefore, the needle tip can be prevented from being damaged due to a mistake in operation.

Claims (1)

A record player's automatic return mechanism comprising: pickup assemblies (22 to 25) fixed to a support rotational portion of a towing arm: a reverse click (24) for detachably attaching the pickup assembly and the detection lever (27); A starter plate 31 having a projection 31b that engages with the turntable shaft gear click 32b; And a driving gear 33 having a cam groove 34 of a HEART shape in which the starting plate is installed and one side is inclined, and the tow arm is rotated by the return lever 35 after the record performance is completed. An automatic return mechanism for a record player, characterized in that it is stored in the rear part of the record player beyond 32a.