JPS5834022B2 - record controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a record playing device, and is configured so that a pickup arm can be raised from a record at an arbitrary position by setting an arm raising position selection knob.
The raised position of the arm can be changed continuously.

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

First, FIG. 1 is a perspective view of the main parts of the apparatus of this embodiment, in which 1 is a cabinet, 2 is a turntable rotatably provided in the cabinet 1, and 3 is an arm panel attached to the cabinet 1.

A pickup arm 4 is rotatably provided on this arm panel 3, and an arm holder that supports the pickup arm 4 when not in use includes a stand 5, an arm lift 6 that raises and lowers the pickup arm 4, and this arm lift. A cueing lever 7 for operating the arm lift 6 and an arm lift position selection knob 8 for selecting the position at which the arm lift 6 is automatically raised when the record playing is finished are provided.

Next, referring to FIG. 2, the lower structure of the arm panel 3 will be explained. A board 9 is attached to the arm panel 3, which is the bottom plate of the arm panel 3 and also serves as the base of the automatic performance mechanism.

A large hole 10 is bored approximately in the center of the substrate 9, and a bearing 1 that rotatably supports an arm rotating shaft 11 that rotates integrally with the pickup arm 4 is provided in the large hole 10.
1' is inserted.

This bearing 11' is attached to the arm panel 3 side.

The arm rotation shaft 11 protruding below the board 9 is inserted into a cylindrical member 13 fixed to one end of the pick fixing plate 12,
It is fixed with screws 14.

Therefore, as the pickup arm 4 rotates, the pick fixing plate 12 also rotates.

A pick movable plate 15 is rotatably provided on the cylindrical member 13 of the pick fixing plate 12.

A tension spring 16 is suspended between the pick movable plate 15 and the pick fixing plate 12, and the pick fixing plate 12 (in contrast, the pick movable plate 15 is urged to rotate clockwise).
A bend 15a provided at the free end of the pick movable plate 15 comes into contact with a regulating member 17 attached to the other end of the pick fixing plate 12, and the pick movable plate 15 is stopped.

The pick movable plate 15 is rotatably provided with a friction plate 18 having bent pieces 18a and 1sb at both ends.

Next, when the pickup arm 4 is rotated clockwise,
The pick fixed plate 12 and the pick movable plate 15 also rotate in the same direction, but at this time, the index plate 19 is arranged at a position where the first bent piece 18a of the friction plate 18 provided on the pick movable plate 15 can come into contact. ing.

This index plate 19 is rotatably supported by a shaft 20 mounted on the lower surface of the substrate 9.

Also, a bent piece 19 provided at one end of this index plate 19
a is inserted into and engaged with a through hole 23a of an articulating arm 23 having an L-shaped cross section, which is fixed with a screw 22 to the lower end of an arm elevation position selection knob 8 that protrudes through a small hole 21 provided in the base plate 9. There is.

Further, the protrusion 23b of the articulated arm 23 is configured to selectively engage with three elongated holes 24a to 24c provided in the base plate 9.

Further, the other end of the index plate 19 is provided with three cut surfaces a, b, and c, which allow the arm elevation position selection knob 8 to be moved to the 30.25 number position, the 17 number position, and the MAN position, respectively. The cut surfaces a, b, and c of the index plate 19 are selectively cut (this pick movable plate 1
The friction plate 18 is brought to a position where it can come into contact with the first bending surface 18a of the friction plate 18 provided at the friction plate 18.

The cut surfaces a and b are the pivot shafts 2 of the index plate 19.
It is a curved surface along the circumference of a circle centered at 0, and the cut surface a is provided at a position slightly farther from the support shaft 20 than the cut surface.

Next, one end of a rotating plate 26 is rotatably supported by a shaft 25 installed near the upper edge of the substrate 9.

This rotating plate 26 is urged to rotate clockwise by a tension spring 27 suspended between it and the base plate 9.

Further, a shaft 28 embedded in this rotating plate 26 has a starting plate 2.
9 is rotatably attached at one end.

A contact member 30 made of an elastic material such as rubber is attached to the other end of the activation plate 29.

Further, a protruding shaft 21 that protrudes downward is implanted in the activation plate 29, and this protruding shaft 31 is inserted into a D hand hole 32 provided in the base plate 9.
is inserted into.

Next, a drive shaft 33 for driving the arm lift 6 is disposed near the lower edge of the substrate 9 so as to be substantially perpendicular to the rotating plate 26 .

A cueing lever 7 is connected and fixed to this drive shaft 33, and as shown in FIGS. 4 and 5, the arm panel 3
It is rotatably held on the side.

Further, a camshaft 34 made of synthetic resin is rotatably mounted on the drive shaft 33.

The position of this camshaft 34 is regulated by a notch 34a provided at one end that contacts the cueing lever 7, and the position of the other end is regulated by a stop plate 35 fixed to the drive M33 so that it does not come off the drive shaft 33. It has become.

A coil spring 36 is loosely fitted onto the camshaft 34.

Both ends of the coil spring 36 are respectively engaged with the protrusion 34b of the camshaft 34 and the base plate 9, thereby urging the camshaft 34 to rotate.

This rotation biasing force is transmitted to the cueing lever 7 via the notch 34a of the camshaft 34, and pushes the lever 7 upward.

The drive shaft 33 is provided with a half-moon-shaped notch 33a, and a lift push-up plate 37 is placed in this notch 33a.

One end of the lift push-up plate 37 is fixed to the lower end of a lift shaft 38 connected to the arm lift 6, and the other end is restricted from rotating by a shaft 39.

The lift shaft 38 has a built-in oil dump mechanism and is inserted into a bearing 40 fixed to the arm panel 3. A coil spring 41 is arranged between the lower surface of the bearing 40 and the lift push-up plate 37. 37 is urged downward.

In FIG. 2, reference numeral 42 denotes a power switch, which is attached to the lower surface of the board 9 via a switch mounting plate 43, as shown in FIGS. 4 and 5.

The power switch 42 is turned off when the push button 42a is pressed via the actuator 44, and turned on when the pressing force on the push button 42a is released and the push button 42a protrudes.

When the power switch 42 is turned on, the turntable 2,
Power supply E is supplied to the drive motor M, and the turntable 2
starts rotating.

Turning the power switch 42 on and off, in other words, suppressing the actuator 44 is performed by a cam portion 45 provided on the cam shaft 34.

The camshaft 34 is also provided with a cam portion 46 for slightly moving the free end 26a of the rotating plate 26.

Next, the operation of the apparatus of this embodiment will be explained.

First, the state before the start of record performance will be explained using FIGS. 1, 4, 6, and 9.

First, the cueing lever 7 is pushed upward by the elastic force of the coil spring 36, as shown in FIGS. 4 and 6.

At this time, the power switch 4 is turned on by the cam portion 45 of the camshaft 34.
Since the second actuator 44 is pressed, the power switch 42 is off, and the turntable drive motor M
energization is not performed.

In this state, the push-up plate 37 of the arm lift 6 comes into contact with one side edge of the semicircular notch 33a of the drive shaft 33, and the arm lift 6 stops at the position where the pickup arm 4 is pushed up.

Furthermore, the free end 26a of the rotating plate 26 is pushed slightly to the right by the cam portion 46I of the camshaft 34, as shown in FIG.

Therefore, the contact member 30 provided at the tip of the activation plate 29 is located within the through hole 3a provided in the side surface of the arm panel 3.

In this state, a record is placed on the turntable 2 and the record is started to be played.The following explanation will be continued assuming that the record to be played has a diameter of 17c1rL.

First, set the arm raising position selection knob 8 to the number 17 position as shown in FIG.

At this time, the index plate 19 is set at the position shown in FIG.

In this case, the pick fixing plate 12 and the pick movable plate 15 are not yet rotated and are held at a position apart from the index plate 19, as shown in FIG.

Next, the pickup arm 4 is removed from the stand 5 and rotated so that the pickup stylus tip (not shown) is positioned above the introduction groove of the record.

Next, bend the cueing lever 7 toward the front in FIG. 1 and push it down.

This downward force of the cueing lever 7 rotates the camshaft 34 through the notch 34a of the camshaft 34 against the biasing force of the coil spring 36.

This rotation of the camshaft 34 causes the free end 26a of the rotating plate 26 to
is biased by the tension spring 27 and the cam portion 46 of the camshaft 34
, and the rotating plate 26 rotates slightly clockwise about the shaft 25.

The free end 26a of the rotating plate 26 comes into contact with an end surface 46a (see FIG. 3) of the cam portion 46 of the camshaft 34 and is locked therein.

Therefore, the camshaft 34 is locked and held in the state shown in FIGS. 5 and 7.

At this time, the activation plate 29 connected to the rotation plate 26 also moves slightly to the left, but the contact member 3o is still in a position separated from the turntable 2.

Further, as the camshaft 34 rotates, the cam portion 45 of the camshaft 34 moves, and the actuator 44 of the power switch 42 moves.
rotates in the direction away from the power switch 42.

Therefore, the push button 42a of the power switch 42 protrudes as shown in FIG. 5, and the power switch 42 is turned on.

Then, power E is supplied to the turntable driving motor M, and the turntable 2 starts rotating.

Furthermore, as the camshaft 34 rotates, the lift push-up plate 37 comes into contact with the entire bottom surface of the half-moon cutout 33a provided in the drive shaft 33, as shown in FIGS. The raised plate 37 is lowered downward from the position shown in FIG. 4 under the biasing force of the coil spring 41.

Therefore, the arm lift 6 is gradually lowered by an oil dump mechanism built into the bearing 40.

As the arm lift 6 descends, the tip of the pickup stylus comes into contact with the introduction groove of the record, and the record starts playing.

When the cueing lever 7 is pushed up to the original position shown in FIG. 1 in the middle of a record performance, the arm lift 6 is raised and the pickup needle tip is separated from the record disc, and the performance is interrupted.

At this time, the camshaft 34 remains locked at the free end 26a of the rotating plate 26 (the state shown in FIG. 7), so the turntable 2 continues to rotate.

Next, as the record playing progresses and the pickup stylus tip enters the feed groove from the final tone groove of the record, the first bent piece 18a of the friction plate 18 provided on the pick movable plate 15 bends as shown in FIG. It comes into contact with the cut surface of the index plate 19.

As the pickup needle tip traces the feed groove, the pick movable plate 15 further rotates clockwise.

As the pick movable plate 15 rotates, the friction plate 1
9 rotates counterclockwise from the position shown in FIG. Press in the direction of arrow A.

Due to the hyper-movement of the protruding shaft 31 in the direction of arrow A, the activation plate 29 rotates in the direction of arrow B about the shaft 28 implanted in the rotation plate 26 as shown in FIG. The outer circumferential surface of No. 2 is brought into contact with the other.

At this time, since the turntable 2 is rotating in the direction of arrow C, the contact member 30 bites into the outer periphery of the turntable 2 and is pressed in the direction of the arrow in FIG. 8 by receiving the rotational force of the turntable 2.

Along with this, the activation plate 29 also moves in the direction indicated by the arrow, and as a result, the shaft 28 connecting the activation plate 29 and the rotation plate 26 moves in the direction indicated by the arrow A.
Pressed strongly in the direction.

Therefore, the rotary plate 26 rotates counterclockwise around the shaft 25, and the free end 26a of the rotary plate 26 moves in the direction of arrow A, and the cam portion 46 of the cam shaft 34 shown in FIG. end face 46a of
distance from.

In this way, the locked state of the camshaft 34 is released, and the camshaft 34 attempts to return to its original state by the elastic return force of the coil spring 36.

When the camshaft 34 returns to rotation, the cueing lever 7 is pressed by the notch 34a of the camshaft 34, and the cueing lever also returns to its original state as shown in FIG.

When the camshaft 34 returns to its original position, the actuator 44 of the power switch 42 is pressed again by the cam portion 45 of the camshaft 34, as shown in FIG. 4, and the power switch 42 is turned off.

Then, the power supply to the turntable driving morph M is stopped.

Further, the return of the cueing lever 7, in other words, the return of rotation of the drive shaft 33 causes the lift push-up plate 37 to move toward the drive shaft 3.
3, and the arm lift 6 slowly rises.

Then, the pickup needle tip is separated from the record.

In addition, in the process of the rotating plate 26 returning from the position shown in FIG. 8 to the original position shown in FIG. 6, the free end 26a of the rotating plate 26
moves along the cam portion 46 of the camshaft 34, so that the entire rotating plate 26 rotates counterclockwise about the shaft 25.

(Accordingly, the activation plate 29 also rotates counterclockwise,
Eventually, the shaft 31 installed on the lower surface of the activation plate 29 comes into contact with the linear inner surface of the D-shaped hole 32 provided in the substrate 9, and the activation plate 29
further rotation is prevented.

As a result, the activation plate 29 rotates around the axis 28, and the rotation plate 26
Rotate clockwise against.

Therefore, when the rotating plate 26 returns to the position shown in FIG. 6, the activation plate 29 also returns to the position where the contact member 30 is separated from the turntable 2, as shown in FIG.

Alternatively, it is conceivable to forcefully rotate the pickup arm 4 to near the center of the turntable 2 manually.

At this time, as shown in FIG. 12, after the first bent piece 18a of the friction plate 18 comes into contact with the index plate 19 and the second bent piece 18b comes into contact with the shaft 31, the pickup arm 4 and the pick fixing plate 12 are rotated, but at this time, as shown in FIG. 12, only the pick fixing plate 12 rotates against the tensile force of the tension spring 16. 15, no excessive force is applied to the friction plate 18, index plate 19, etc.

Further, in the above embodiment, the case where a record disc having a diameter of 17CrfL is played is explained, but when playing a record disc having a diameter of 3ocrfL or 25crfL, the friction plate 18 provided on the pick movable plate 15 on the cut surface a of the index plate 19 The other operations are performed in the same manner as described above, except that the first bent piece 18a of the first bent piece 18a contacts the first bent piece 18a.

To add a little bit, the diameter of the final sound groove of a record with a diameter of 17α is slightly larger than that of a record with a diameter of 30 CrrL or 25 CrrL, so the distance between the cut surfaces a and b of the index plate 19 and the support shaft 20 of the index plate 19 is The difference is corrected by making them different.

Also, set the arm raising position selection knob 8 to MAN (MANUA).
L) When the pickup needle tip reaches the lead-out groove which is the final groove of the record, the first bent piece 18a of the friction plate 18 provided on the pick movable plate 15 will not touch the cut surface C of the index plate 19. Do not touch.

Further, even if the first bent piece 18a contacts the cut surface C of the index plate 19, the second bent piece 18b of the friction plate 18 does not contact the protruding shaft 31 implanted in the activation plate 29.

Therefore, the arm lift 6 does not rise and the pickup stylus continues to trace the lead-out groove of the record.

At this time, the cueing lever 7 is manually operated to raise the arm lift 6 to separate the pickup needle tip from the record.

When the pickup arm 4 is further rotated clockwise by manual operation, the second bent piece 18b of the friction plate 18 provided on the pick movable plate 15 presses the protruding shaft 31 of the activation plate 29, causing the activation plate 29 to Rotate in the direction of arrow B in Fig. 7.

Thereafter, the above-described operations are performed, the camshaft 34 returns to its original position, the power switch 42 is turned off, and the turntable 2 stops rotating.

In the first embodiment described above, the cueing lever 7 is raised in the middle of the record playing, and the arm lift 6
It was not possible to raise the pickup stylus to separate the pickup stylus from the top of the record, and also to stop the rotation of the turntable 2.

In order to make this possible, the inventor discloses a configuration as shown in FIG.

That is, in FIG. 13, 47 is a cut pin movable in the direction of arrow B, and 48 is a cut lever that moves the cut pin in the direction of arrow B by being rotated in the CUT direction, that is, in the direction of arrow E.

When the cut lever 48 is operated in the CUT direction while the record performance shown in FIG. 13 is in progress, the cut pin 47 moves in the direction of arrow B, causing the activation plate 29 to rotate in the same direction.

As the activation plate 29 rotates, the contact member 30 bites into the outer periphery of the turntable 2 as shown in FIG. The turntable 2 is separated from the record, the rotation of the turntable 2 is stopped, and the state shown in FIG. 6 is restored.

Since the operating force of the cut lever 48 only needs to be enough to slightly rotate the activation plate 29, it is possible to cut a record performance with an extremely small operating force.

In addition, if such a cutting function is provided, after the pickup arm 4 is once raised in the operation process when the above-mentioned arm raising position selection knob 8 is set to the MAN position, the pickup arm 4 can be held by hand. The cut lever 4 can be rotated clockwise.
8, the pickup arm 4 rises and the turntable 2 stops rotating.

Therefore, in this case, the cut surface C of the index plate 19
does not need to be specifically provided.

Further, in the above embodiment, depending on the cut surfaces a and b provided on the index plate 19, the diameter is 30 CrrL or 25 CrrL.
After tracing the final tone groove of a CrrL record with a diameter of 17 m, the pickup stylus tip is automatically raised from the record and the rotation of the turntable 2 is stopped. It is also possible to end the record performance at any position in the sound groove.

In contrast, the inventor discloses a configuration as shown in FIG. 14.

That is, in FIG. 14, 19' is an index plate, which has a cut surface d at one end.

This cut surface is the pivot shaft 20' of the index plate 19'.
The curved surface has a slightly different distance from the surface.

Therefore, by rotating the arm raising position selection knob, rotating the index plate 19', and changing the position of the cut surface d that the first bent piece 18a of the friction plate 18 comes into contact with, it can be activated at any position. The protruding shaft 31 of the plate 29 is pressed, and the chord performance can be automatically ended as described above.

In addition, in the above embodiment, as shown in FIG. 3, a camshaft 34 is rotatably attached to the drive shaft 33 of the cueing lever 7.
Even if the camshaft 34 is locked by the rotating plate 26 as shown in FIG. 7, the cueing lever 7 can be freely operated. is able to rise.

This is convenient when temporarily interrupting the performance of a record.

However, if the user wishes to stop the rotation of the turntable 2 when the user operates the cueing lever 7 in the direction in which the pickup arm 4 rises, the camshaft 34 may be fixed to the drive shaft 33 of the cueing lever 7. Alternatively, a drive shaft 33 having the camshaft 34 integrally may be provided.

By doing this, the switch 42 for energizing the turntable drive motor M is turned on by raising and lowering the pickup arm 4 as the cueing lever 7 is operated.
It will be turned off.

In this case, means for locking the camshaft 34 (rotating plate 26), etc. are unnecessary.

By the way, when attaching arm panel 3 to the cabinet,
When the contact member 30 is attached to the turntable 2 at a desired position, there is a possibility that the contact member 30 may not fit into the turntable 2 at the desired position if there are variations in the position or dimensions of each component of the date and time mechanism.

In order to solve this problem, the inventor discloses a configuration as shown in FIG. 15.

That is, an eccentric shaft 49 is installed at the tip of the activation plate 29', and a disk-shaped contact member 30' is attached to this shaft 49 so as to move eccentrically.

With this configuration, the distance from the rotation axis 28 of the activation plate 29 to the tip of the contact member 30' can be easily adjusted, so that reliable operation can be performed even if there is the above-mentioned variation.

As explained above, the automatic record playing device of the present invention has the following features:
When the record is played to a position determined by the index means, an automatic mechanism is driven by the rotational force of the turntable and the pickup stylus is moved away from the record, and the driving force of the automatic mechanism is Since it uses the rotational force of the turntable, there is no need to prepare a separate drive source such as a motor, so it is economically preferable.
Furthermore, since the rotational force of the turntable is taken out from the outer periphery of the turntable, the automatic performance mechanism occupies less space and can be made smaller.

Moreover, in the present invention, the index plate that determines the raised position of the pickup arm is provided with a curved surface whose distance from the rotation fulcrum is continuously different, and the rotation member that rotates together with the pickup arm hits any position on the curved surface. Since the pickup arm is raised based on the contact, the raised position of the pickup arm can be continuously changed by continuously changing the rotation angle of the index plate.

Therefore, for example, it is possible to raise the pickup arm at the end of any song recorded on a 3° crr LLP record, or even immediately after the needle tip enters the lead-out groove at the end of the song. It is very easy to raise the pickup arm, or trace most of the lead-out groove and raise the pickup arm just before entering the next song.

[Brief explanation of drawings]

FIG. 1 is a plan view of a record playing device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of essential parts of the device, FIG. 3 is a perspective view of a portion of a cueing lever constituting the device, and FIG.
5 is a front view showing the state before and after the operation of the cueing lever of the device, and FIGS. 6 to 8 are plan views illustrating the state of the automatic mechanism as the device progresses, 9 to 12 are plan views illustrating the movement of index parts such as a pick fixing plate and a pick movable plate as the device advances in operation, and FIG. 13 is a plan view of a record playing device according to another embodiment of the present invention. FIG. 14 is a plan view showing the automatic mechanism, FIG. 14 is a plan view showing the index portion, and FIG. 15 is a perspective view showing the activation plate and contact member portion. 1... Cabinet, 2... Turntable, 3... Arm panel, 4...
Pickup arm 5...The arm holder is a stand, 6.
...Arm lift, 7...Cueing lever 8...Arm lift position selection knob, 9
...... Board, 10. Large hole, 11. Curved arm axis, 11'... Bearing, 12... Pick fixing plate, 15... Pick movable plate, 18...Curved friction plate, 19-... Index plate, 26
... Rotating plate, 29 ... Starting plate, 33.
... Drive shaft, 34, curved cam shaft, 36...
・Coil spring, 37 ・Kokukan foot push-up plate, 42...
...Power switch, 44...Song actuator, M...
...Turntable drive motor, El. ···power supply.

Claims (1)

[Claims] 1. An arm lift that raises and lowers the pickup arm,
A cueing lever that operates the arm lift to move up and down via a rotating shaft, a camshaft that constantly biases the cueing lever in the direction in which the arm lift moves upward, and a camshaft that constantly biases the cueing lever in the direction in which the arm lift moves upward. a locking means for locking the camshaft, which biases the cueing lever, in that position when the cueing lever is operated; The pickup arm is provided with a lock releasing means for releasing the locked state of the camshaft, and an indexing means for activating the locking means to bite into the outer periphery of the turntable when the pickup arm is rotated to a predetermined position, the indexing means , consisting of a rotating member that rotates together with the pickup arm, and an index plate that rotates together with the arm raising position selection knob and has a curved surface whose distance from the rotation fulcrum continuously varies;
A record playing device characterized in that the locking means is configured to bite into the outer periphery of the turntable based on the rotational member coming into contact with an arbitrary position on the curved surface of the index plate.