JPS5816542B2 - Power switch operation mechanism in autoplayer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operating mechanism for a power switch in an auto player, and in particular, during auto operation, even when the auto manual and power off operation mode mechanisms are operated to the power off mode, Regardless of this, the present invention is characterized in that the power switch is configured to maintain the on state.

FIG. 1 is a schematic bottom plan view of the operating mechanism including the main parts of the present invention, showing the chassis mechanism on which the turntable is mounted, viewed from below, and FIG. FIG. 3 is a perspective view of the main parts viewed from above, which is the placement side.

First, reference numeral 1 denotes a center gear rotatably attached to the center of the chassis, and the center gear 1 is provided with a gear part 2 at its midsection, and a claw protrusion 3 at its lower part.
It is fixed integrally with the center shaft (on which the turntable is placed) that protrudes from the back side of the chassis.

Further, the center gear 1 is rotatably and smoothly supported by a bracket 4 installed in the chassis.

Further, a support shaft 5 is stretched between the tip of the bracket 4 and the chassis, and a large-diameter plate-shaped drive gear 6 is rotatably attached to the support shaft 5. .

A first trip 8 and a second trip 9, which can rotate around a support shaft 7, are attached to the lower surface of the drive gear 6 independently and overlapping each other, and among them,
A claw piece 10 is protruded from one end of the first trip 8, and a working piece 11 is protruded from the other end, and the end 8a of the working piece 11 is bent.
It faces into the elongated hole 12 of the drive gear 60 and restricts the rotation range of the first truffle 180.

The drive gear 6 has a concave notch 6a that continues to a part of the gear, a control pin 6b, and a short pin 6c6d that is shorter than the control pin 6b and protrudes from the lower surface thereof.

On the other hand, one end 9a of the second trip 9 is extended long on the lower surface of the drive gear 6, and its tip is bent, and faces into the elongated hole 13 of the drive gear 60, thereby controlling the rotation range of the second trip rough 90. It becomes like regulating.

Further, a heart cam groove 14 formed by two protrusions is provided on the upper surface of the drive gear 6, and a portion of the cam groove 14 is deep as described later, and is used for controlling the elevation of the arm lifter. Served.

Reference numeral 15 denotes a start/reject operating lever, which is supported by a bracket 16 formed by standing up the chassis, and has an operating portion 15a and an operating portion 15b, and the operating portion 15b is connected to the first truffle 180 operating piece 11. It's like facing.

Reference numeral 17 denotes a shaft mounted on the chassis. A main lever 18 is rotatably attached to the shaft 17, and the main lever 18 is always pushed back by a coil spring 19 attached to the shaft 17. The main lever 18 is mounted in a clockwise direction so as to force the one end 18a side of the main lever 18 downward, and a projection for controlling the rotational movement of the main lever 18 is provided on the lower surface of the one end 18a side. The child 20 is provided in a protruding manner so that it comes into contact with the inside of the cam groove 14.

Further, - a projecting piece 21 is provided protrudingly on the other end 18b side of the main lever 18, and between this projecting piece 21 and an extension part 19a of the part where the coil spring 19 is fixed to the main lever 18. A certain interval is provided.

Reference numeral 22 designates a rotating shaft that is integral with the horizontal rotating shaft of a tone arm (not shown), and is smoothly held by a well-known bearing mechanism.A fan-shaped lever 23 is fixed to the rotating shaft 22.
A tone arm operating plate 24 is rotatably fitted loosely so as to overlap the fan-shaped lever 23.

Further, the tone arm operating plate 24 is connected to the second trip 9 and is formed in an elongated shape so as to define a lead-out point of the stylus onto the disc, as will be described later. An operating pin 25 is installed near the rotation shaft 22 and is interposed in the above-mentioned interval.

Further, the drop point fine adjustment cam 26 is attached to the side opposite to the operating pin 25, and the cam is loosely fitted into the fan-shaped hole 27 formed in the fan-shaped lever 23, so that the fine adjustment cam 26 can be freely adjusted. The relative relationship with the cam 26 enables the above-mentioned fine adjustment.

24a is the fan-shaped lever 23 and the tone arm operating plate 24;
A spring stretched between the tone arm operating plate 24 and the fan-shaped lever 23 constantly biases the tone arm operating plate 24 in the counterclockwise direction.

Reference numeral 28 denotes a sizing lever rotatably attached to the shaft rod 17, which operates to indicate the drop point according to the size of the disc, and has a cam hole formed by drilling a through hole at one end. 29 and a cam piece 30, the cam hole 29 has two valley cams 29a and 29b, and the cam piece 30 has two valley cams 30a and 30.
b are respectively provided, and the other end extends concentrically to the drive gear 6.

Reference numeral 31 denotes a disk size selector rod which is operated from the back side of the chassis to engage with the cam 29a or 29b.Selecting the position of this size selector rod 31 determines the rotation range of the sizing lever 28. .

32 is a spring that urges the sizing lever 28 to rotate in the clockwise direction.

Reference numeral 33 denotes a substantially Y-shaped Noriheat feed lever constituting a first rotary lever supported rotatably around the shaft rod 17, and the end of one piece 33a thereof extends in the direction toward the support shaft 5. A parallel cam 34, a square cam 35, and a guide cam 36 are arranged in a protruding manner, and the other piece 33b is attached with a repeat feeding piece 38 which is rotatably biased by a spring 37. A projecting pin 39 provided downwardly on the feed piece 38 operates a repeat feed plate, which will be described later, along a through hole drilled in the chassis.

Note that 40 is a spring that biases the repeat feed lever 33 in the counterclockwise direction.

Further, a protruding pin 41 is raised on the Noh piece 33b,
The protruding pin 41 is brought into contact with a piece 44a of a modified Y-shaped arm stopper 44 which is urged clockwise around a support shaft 43 by a spring 42.

45 is a hook provided on the Ω piece 44b other than the arm stopper 44, and 46 is the base piece 4 of the arm stopper 44.
This is a projecting pin protruding from the lower surface of 4c, which is engaged with a cam of a repeat feed plate, which will be described later.

Reference numeral 47 denotes an actuation switch plate constituting a second rotary lever which is rotatably mounted around the shaft rod 17, and a spring 47a is interposed between it and the repeat feed lever 33, and a spring 47a is interposed between the plate and the repeat feed lever 33. The actuation switch plate 47 is urged counterclockwise with respect to the bar 33.

Reference numeral 48 denotes a switch attached to the actuation switch plate 47, and its actuator 48a is covered by the actuation plate 48b. The switch operation rod stands up from the lifter plate.

In addition, 49 is a speed changeover switch, 50 is a drive motor, and 51 is a hydraulic lifter shaft facing the bottom surface of the main lever 18, which is always urged upward via a spring, and is It's like being touched.

FIG. 3 is a plan view of the device shown in FIG. 1, viewed from the top surface on which the turntable is placed, with the player's turntable and the like facing upward.

Here, 52 is a center shaft integrated with the center gear 1, and a turntable 53 is supported on the center shaft 52 as is well known.
4 is a drive shaft of the drive motor 50, and the drive shaft 54
A rubber belt 56 is stretched between the turntable 53 and the convex pulley 55 of the turntable 53.
appears to rotate at a predetermined speed.

, 57 is a size selector having the size selector rod 31, which detects the size of the disc (LP or EP disc) placed on the turntable 55 and rotates left and right about the spindle 58. , the rotation range of the size selector rod 31 is determined to control the size determining lever.

Reference numeral 59 denotes a horizontal rotation shaft of the tone arm 60 connected to the rotation shaft 22. A bracket 61 is supported on the horizontal rotation shaft. The tone arm 60 is supported so as to be rotatable in the vertical direction.
A cartridge shell 64 and a cartridge 65 are attached to the tip of the cartridge 0.

66 is an armrest board having an armrest 68; 67
69 is a lifter plate which directly supports the tone arm 60, and the end of the lifter plate 69 is connected to the lifter shaft 51.
In addition, a cam plate 70 with a smooth lower surface protruding is attached to the middle of the lifter shaft 51, and a through hole 71 through which the lifter shaft 51 is inserted is inserted. A guide cam 72 having a convex cam that is gradually formed higher along the guide cam 72 supports the cam plate 70.
3 is a switch operating rod that stands up from the guide cam 72; 7;
A spring 4 biases the guide cam 72 clockwise around the support shaft 72a.

Next, 75 is a repeat feed plate that moves back and forth on the chassis, and its guide grooves 76 and 77 are guided by guide members 78 and 79 attached to the feeder chassis, respectively. Three serrated cams 80, a parallel cam 81 following the serrated cams 80, and a sliding position stabilizing cam 82 following the parallel cams 81 are connected to the left edge of the 75. In order to set the feed position of the repeat feed plate 75 correctly, a steel ball (not shown) urged by a spring elastically supports the valley of the sliding position stabilizing cam, and,
The protruding pin 39 faces the serrated cam.

On the other hand, a parallel cam 83 and a trough cam 84 that follow the groove are provided on the right side edge of the repeat feed plate 75. The protruding pins 46 are in sliding contact with each other.

A retaining member 86 is also provided at the rear end of the repeat feed plate 75.
is attached, and the engaged portion 72d of the guide cam 72, which is biased to rotate clockwise in the figure by a spring 74, abuts against this retaining member 86. Reference numeral 49 is a speed changeover switch. be.

Note that from the position where the repeat feed plate 75 is pushed to the rearmost position, the power is turned off and the lifter plate 69 is raised, and then when the repeat feed plate 75 is pushed one step forward, the power is turned on and the lifter plate 69 is turned on.
Down manual mode, further forward 2 steps, 3 steps
Draw tiers, 4 tiers, then auto-repeat 2 and 3 times.
times and 4 times repeat mode, further subtract 5 steps,
An autoplayer configured as described above, in which an infinite number of autorepeat modes are formed.

Regarding the mechanism, the main parts of the present invention will be mainly explained with reference to FIGS. 4 and 5.

First, in the tone arm up mode with the power off and the repeat feed plate 75, which is the mode selector, pushed backward, the lifter shaft is 51 is pushed upward to obtain the n tone arm up state, and the switch operation rod 73 mentioned above is moved upward to the fourth position.
The position indicated by the solid line in the figure is the operating plate 4 of the switch 48.
It is located far away from 8b, and a power-off state can be obtained.

When the repeat feed plate 75 is advanced one step forward from this mode to enter the manual mode, the guide cam plate T2 is pulled back by the spring 74, so the guide cam plate 72 rotates clockwise. Then, the switch operation section 73 reaches the position indicated by the chain line in FIG. is driven and the rising portion 72b of the guide cam plate 72 retreats to obtain the tone arm down play state.Also, when the repeat feed plate is subsequently advanced to the front and the auto repeat mode is set,
Similarly, if the power switch 48 continues to be turned on, the lifter shaft 51 extending below the through hole 11 is driven by the drive gear 6 to move the tone arm 60 up and down. Controlled by a lever.

On the other hand, when the auto-repeat mode is entered, the operation lever 15, which is the start or redirect operation means, is activated.
As a result of the operation, the actuating part 15b at the tip urges the first trip 8 on the drive gear 6 in the clockwise direction around the support shaft 7, and the claw piece of the first trip 8 10 is a pawl protrusion 3 provided on the center gear 1.
The drive gear 6 is forcibly rotated by the rotating center gear 1, and the gear part 2 of the center gear 1 comes out of the notch 6a, and the drive gear 6 is forced to rotate. It seems to mesh with part of gear 6.

Note that when the gear part 2 of the center gear 1 is within the notch 6a, the control pin 6b implanted in the center gear 6 is connected to the V of the repeat feed lever 33.
The repeat feed lever 33 is located inside the letter-shaped groove cam 35.
, and presses the parallel cam 47b of the actuation switch plate 47 against the spring 47a.

Therefore, at this time, the power switch 48 on the operation switch plate 4T is turned off because the protruding pin 33c planted on the repeat feed lever 33 is far away from the operation plate 48b. The power switch 48 is not turned on by the projecting pin 33c, but is turned on only by the switch operating rod 73.

Next, due to the meshing of the drive gear 6 and the center gear 1, the control pin 6 in the 7-shaped grooved cam 35 is
b begins to rotate while drawing a nine-circle locus centered on the support shaft 5.

Due to this rotation, the control pin 6b escapes from the V-shaped groove cam 35 and reaches the guide cam 36.

At this time, the engagement of the actuation switch actuation plate 47 with the parallel cam 47b is also released, the control pin 6b is guided by the notch cam 47c, and the actuation switch actuation plate 47 is guided by the notched cam 47c.
7 is rotated counterclockwise about the support 17 under the force of the spring 47a.

This rotation causes the actuator 48a to press the protrusion pin 33c on the repeat feed lever 33 via the actuation plate 48b of the power switch 48, and the actuator 48a is pushed in, causing the switch 48 to press. is energized on.

This state continues until the drive gear 6 completes one rotation.

Even if the repeat feed plate 175 is suddenly pushed back by hand until the end of this one rotation, and the power is turned off and the lifter plate 69 is placed in the up mode, the power switch 48
does not turn off, but always turns off after the drive gear 6 has completed one revolution.

That is, when in the auto repeat mode or manual mode, the turntable continues to rotate despite the operation of the repeat feed plate 75 in the power off mode and the lifter plate 69 in the up mode, and the drive gear 6
rotates once.

Therefore, while the tone arm 60 is operating the automatic operating mechanism such as lead-in and lead-out, the repeat feed plate 75
Even if the power is turned off and the lifter plate 69 is operated in the up mode, the drive gear 6 will not stop midway, so when the power is turned on again, the drive gear will not be affected by the heavy load of the repeat feed plate 75, etc. It is possible to avoid a situation where the center gear 1 cannot rotate.

As described above, the present invention includes a manual operation mechanism for opening and closing the power switch, and an automatic closing mechanism for closing the power switch during operation of the automatic operation mechanism in which the drive gear is rotated by the center gear. In the automatic closing mechanism, the automatic closing mechanism includes first and second rotating levers that abut a control pin provided on the drive gear, and a locking mechanism provided between the first and second rotating levers. a spring, which is attached to the 20th rotary lever and relatively rotates the first rotary lever and the second rotary lever by movement of the control pin accompanied by the rotation of the drive gear; Since the power switch is closed by the tenth rotating lever, the power switch is closed while the automatic operating mechanism is in operation, regardless of the state of the operating means. As a result, even if the repeat feed plate is operated during full auto operation and the power is turned off, the drive gear will not stop rotating midway and will always be set to its initial state. Start-up is performed smoothly and reliably when the disc playback mode is entered again.

[Brief explanation of the drawing]

Fig. 1 is a bottom view of the back side of the player chassis including the main parts of the present invention, Fig. 2 is a perspective view of the main parts of the player chassis viewed from the turntable mounting side, and Fig. 3 is a similar view of the turntable mounting surface. The plan view, FIG. 4, and FIG. 5 are also a back view and a plan view of the main parts.

Claims (1)

[Claims] 1 In the case where the power switch is equipped with a manual operation mechanism that opens and closes the power switch, and an automatic closing mechanism that closes the power switch during operation of the automatic operation mechanism in which the drive gear is rotated by the center gear, the automatic The closing mechanism includes first and second rotating levers that abut a control pin provided on the drive gear, and a spring provided between the first and second rotating levers, and the closing mechanism includes a spring provided between the first and second rotating levers. The movement of the control pin accompanied by the rotation of the 20th rotating lever causes the first rotating lever and the second rotating lever to rotate relative to each other, and the power switch attached to the 20th rotating lever is connected to the first rotating lever. A power switch operation mechanism for an auto player that is closed by a rotating lever.