JPS6155162B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device for a tone arm in a record player that automatically holds the tone arm in a predetermined position depending on the usage status of the record player.

Generally, the tone arm of a record player is
A locking device holds it in place when not in use to protect it from damage caused by shipping or the like.

Conventionally, this type of lock device has a structure in which locking and unlocking operations are performed manually, and therefore cannot sufficiently protect the tone arm. In other words, since this is a manually operated locking device, there is a risk of forgetting to lock the record player when transporting it, or moving the tone arm without unlocking it during use, resulting in damage to the tone arm, etc. This may occur.

Furthermore, even in a record player equipped with an automatic performance mechanism, if the lock device is simply linked to the automatic performance operation, the user may forget to perform the above-mentioned locking and unlocking operations during manual performance. .

In other words, although the conventional tone arm locking device was originally provided for the purpose of protecting the tone arm, it has drawbacks that may cause damage to the tone arm due to its operability. It had the following characteristics.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the conventional tone arm locking device, the present invention has been proposed to automatically perform a locking operation when the tone arm should be protected in accordance with the usage status of the record player. To provide a locking device for a tone arm in a record player, which automatically releases the lock when the record player is in use.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing one embodiment.

1 and 2 are a plan view from below and a plan view from above of a fully automatic record player to which the present invention is applied.

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 portion 2 at its midsection, a claw protrusion 3 at its lower part, and a protrusion 3 protruding from the back side of the chassis. Center shaft (on which the turntable is placed)
It is fixed in one piece. 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.
A claw piece 10 is provided at one end of the trip 8, and an operating piece 11 is protruded from the other end. The rotation range of the trip 8 of 1 is restricted. In addition, the above drive gear 6
, there is a toothless portion 6a following the gear portion, and a long pin 6b and short pins 6c and 6d protruding from the lower surface thereof. On the other hand, one end 9a of the second trip 9 is extended long from the lower surface of the drive gear 6, and its tip is bent, facing into the elongated hole 13 of the drive gear 6, and the second trip 9 rotates. It's like restricting the range of movement. Further, a heart cam groove 14 formed by two protrusions is provided on the upper surface of the drive gear 6, and a part 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 an operating rod for start/reject, which is supported by a bracket 16 formed by standing up the chassis, and has an operating part 15a and an operating part 15b, and the operating part 15b is connected to the operating piece 11 of the first trip 8. It will be like facing. A main lever 18 is rotatably attached to the stem 17, and the main lever 18 is always operated by a coil spring 19 attached to the stem 17. counterclockwise, and one end 18 of the main lever 18
The main lever 18 is attached so as to bias the a side downward, and a protrusion 20 that controls the rotational movement of the main lever 18 is protruded from the lower surface of the one end 18a side, and this protrusion 20 is brought into contact with the inside of the cam groove 14. It becomes like this. Therefore, this main lever 18 performs a seesaw action and a rotating action. In addition, the above main lever 1
A projecting piece 21 is provided protruding from the other end 18b of the coil spring 18, and a certain distance is provided between this projecting piece 21 and an extension 19a of the portion where the coil spring 19 is fixed to the main lever 18. ing. Reference numeral 22 denotes 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, and As if superimposed on 23,
A tone arm operating plate 24 is rotatably fitted with play. The tone arm actuating plate 24 is connected to a sizing lever 28, which will be described later, and is formed into an elongated shape so as to define a drop point of the stylus onto the disk, as described below. An operating pin 25 is installed in the vicinity of the rotation shaft 22 so as to be interposed between the protrusion 21 and the extension 19a of the coil spring 19. Further, on the side opposite to the operating pin 25, there is provided a fine adjustment cam 26 for the drop point.
is attached, and the cam is loosely fitted into the fan-shaped hole 27 formed in the fan-shaped lever 23,
The relative relationship with the fine adjustment cam 26 enables the fine adjustment. Reference numeral 24a denotes a spring stretched between the fan-shaped lever 23 and the tone arm actuating plate 24, which always urges the tone arm actuating plate 24 counterclockwise with respect to the fan-shaped lever 23.

Reference numeral 28 denotes a size determining lever rotatably mounted around the shaft rod 17, which operates to indicate the drop point according to the size of the disk, and has a through hole bored at one end. A formed cam hole 29 and a cam piece 30 are provided, and the cam hole 29 is
The two valley cams 29a and 29b are connected to the cam piece 3.
0 is provided with two valley cams 30a and 30b, respectively, and the other end extends concentrically to the drive gear 6. 31 is a disk size selector rod which is operated from the back side of the chassis and engages with the cam 29a or 29b;
By selecting the position of the size selector rod 31, the rotation range of the sizing lever 28 is determined. 32 is a spring that urges the sizing lever 28 to rotate clockwise.

Reference numeral 33 denotes a substantially Y-shaped repeat feed lever rotatably supported around the shaft rod 17. The end of one piece 33a of the lever 33 is protruded in the direction toward the support shaft 5, and parallel cams 34, A V-shaped cam 35 and a guide cam 36 are arranged in series, and a repeat feed piece 38 is attached to the other piece 33b and is rotationally biased by a spring 37. A projecting pin 39 is arranged along a through hole bored in the chassis to actuate a program lever to be described later. Note that 40 is a spring that biases the repeat feed lever 33 in the counterclockwise direction. A projecting pin 41 is erected on the other piece 33b, and a piece 44a of the deformed Y-shaped arm stopper 44 is biased clockwise around the support shaft 43 by a spring 42. The protruding pin 41 is shaped so as to be in contact with it. 45 is a hook provided on the other piece 44b of the arm stopper 44, and 46 is a protrusion protruding from the lower surface of the base piece 44c of the arm stopper 44, which is engaged with a cam of a repeat feed plate to be described later. It's a pin. Here, in the state shown in FIG. 1, that is, the V-shaped cam 35 of the repeat feed lever 33 is locked by the long pin 6b of the drive gear 6, and the counterclockwise rotation by the spring 40 is restricted. In this case, the protruding pin 41 of the repeat feed lever 33 locks a piece 44a of the arm stopper 44 to restrict clockwise rotation of the arm stopper 44. When the long pin 6b comes off the V-shaped cam 35 due to the rotational action of the drive gear 6, which will be described later, the repeat feed lever 33 rotates counterclockwise around the shaft 17, and One piece 44a of the arm stopper 44 is unlocked. In this way, the rotational movement of the arm stopper 44 when the rotational restriction of the arm stopper 44 by the protruding pin 41 is released is determined according to the operation setting position of the repeat feed plate, which will be described later. That is, when the repeat feed plate (described later) is operated in the power-on mode, the projecting pin 46 of the arm stopper 44 is in a state facing and spaced apart from the valley cam surface 84 (described later) provided on the repeat feed plate. 44 is rotated clockwise about the support shaft 43 in the clockwise direction in FIG. The lead-in of the tone arm is thus restricted, but when the repeat feed plate is operated to the auto repeat position, the protrusion pin 41 is
Even if the lock of 4a is released, the arm stopper 44
Since the projecting pin 46 is in contact with a parallel cam 83 (described later) provided on the repeat feed plate, the arm stopper 44 is connected to the hook portion 45 and the upright piece 24.
Since it does not engage with b, the arm actuating plate 24
is able to freely rotate in the lead-in direction under the force of the spring 24a. Furthermore, the rotation of the arm actuating plate 24 in the lead-in direction acts on the tip 9a of the second trip 9 described above, thereby enabling the drive gear 6 to rotate continuously. In other words, it enables the player to perform an auto-repeat operation.

Reference numeral 47 denotes an actuation switch plate rotatably mounted around the shaft rod 17, and a spring 47a is interposed between it and the repeat feed lever 33, so that the actuation switch plate 47 in the counterclockwise direction.
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 operating rod stands up from the lifter plate and looks like it's facing you. In addition, 4
9 is a speed selector switch, 50 is a drive motor,
Reference numeral 51 denotes a hydraulic lifter shaft that faces the lower surface of the main lever 18, and is always urged upward via a spring so as to come into contact with the lower surface of the main lever 18.

FIG. 2 is a plan view of the device shown in FIG. 1, viewed from the top, which is the side on which the turntable is placed, so that the player's turntable and the like are viewed from above. Here, 52 is the center gear 1
A turntable 53 is supported on the center shaft 52 as is well known. Further, 54 is a drive shaft of the drive motor 50, and a rubber belt 56 is stretched between the drive shaft 54 and a convex circular pulley 55 of the turntable 53.
3 rotates at a predetermined speed. Reference numeral 57 denotes 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, rotates left and right around the spindle 58, and selects the size selector as described above. The sizing lever is controlled by the rotational position of the size selector rod 31. 59 is the rotation axis 2
With the horizontal rotation axis of the tone arm 60 connected to 2,
A bracket 61 is supported on the horizontal rotation shaft, and a pivot 62 attached to the bracket 61 supports the tone arm 60 via a support plate 63.
is supported rotatably in the vertical direction. Also,
A cartridge shell 64 and a cartridge 65 are attached to the tip of the tone arm 60. 66 is an armrest plate having an armrest 68; 67 is a through hole drilled in the chassis to guide the aforementioned projecting pin 39; 69 is a lifter plate that directly supports the tone arm 60; is attached to the lifter shaft 51. Further, a cam plate 70 having a smooth lower surface protruding is attached to the middle of the lifter shaft 51.
The cam plate 70 is supported by a guide cam 72 having a through hole 71 through which the lifter shaft 51 is inserted and a convex cam 72b formed to be gradually higher along the through hole 71. Reference numeral 73 designates a switch operating rod that stands up from the guide cam 72 and faces the operating plate 48b of the switch 48.
A spring 74 biases the guide cam 72 clockwise about the support shaft 72a.

Next, 75 is an operating lever that is manually operated to move back and forth on the chassis, and its guide groove 76
and 77 are respectively guided by guide members 78 and 79 attached to the chassis.
one serrated cam 80 followed by a parallel cam 81 and a sliding position stabilizing cam 82 following the parallel cam 81
is connected to the sliding position stabilizing cam 82, and a steel ball (not shown) biased by a spring is attached to the sliding position stabilizing cam 82 so as to correctly set the feeding position of the operating lever plate 75. The trough portion of the dynamic position stabilizing cam is held elastically, and the saw-toothed cam faces the protruding pin 39. On the other hand, the right edge of the operating lever is provided with a parallel cam surface 83 and a valley cam surface 84 following it, and these cam surfaces 83 and 84 have projections protruding from the base piece 44c of the arm stopper 44. The pin 46 is shaped so as to be in sliding contact. Further, a hook member 75 is supported at the rear end of the operating lever 75 so as to be slidable in the longitudinal direction via a spring (not shown).
a is attached, and this becomes able to engage the pin 72c on the guide cam 72, hooking the guide cam 72 and rotating it clockwise,
The switch 48 is turned on.

Note that 85 is an operating lever for the speed changeover switch 49. With these configurations, a second control mechanism interlocked with the operating lever 75 is configured.

As shown in FIG. 3, the armrest board 66 constructed in the drive mechanism, which is the main part of the record player constructed as described above, has a lock means for holding the tone arm 60 in a predetermined position near the armrest 68. A hook-shaped lock protrusion 100 constituting the support shaft 1 is formed in an upright manner.
An opening 104 is formed in which a lock pin 103 connected to one end of a seesaw lock plate 102 is rotatably supported by a lock plate 102 for seesaw movement. In addition, the above-mentioned seesaw lock plate 102
The lock pin 103 is biased by a spring 105 in the direction of protruding from the opening 104 of the armrest board 66, and a first
A second contact piece 109 extends toward the player chassis 108. A rotating arm 111 having an operating end 110 that comes into contact with the first abutting piece 107 of the seesaw lock plate 102 is rotatably supported by a support shaft 112. Further, a receiving plate 113 is provided extending from the guide cam 72 so as to come into contact with the second abutting piece 109 of the seesaw lock plate 102 . Furthermore, the above-mentioned rotating arm 111
is the opening 10 formed in the player housing 106.
The drive end 114 is provided on the rear wall 115a of the player lid 115.
is abutted and rotated in accordance with the opening/closing movement of the player lid 115, so that its working end 110 abuts against the lower surface 107a of the first abutting piece 107 of the seesaw lock plate 102. It's summery.

With the configuration as described above, the player lid body 115
A first control mechanism is configured that operates in conjunction with the opening/closing movement of the opening/closing movement.

The player lid 115 described above is attached to the player housing 106 by a hinge mechanism (not shown) so as to be openable and closable.

Therefore, in the present invention configured as described above, the tone arm 6 is operated by the following operation.
0 is automatically locked at a predetermined position on the armrest board 66 above the armrest 68, and is operated to release this lock.

That is, when the operation lever 75 of the fully automatic player having the above-mentioned configuration is operated and selected to the non-operating position and the player lid 115 is closed, the spring is activated as shown in the side sectional view of FIG. 105, the locking pin 103 of the seesaw locking plate 102 is in a state of protruding from the opening 104 formed in the armrest plate 66, and the locking protrusion 100 arranged on the armrest plate 66 and the above-mentioned Lock pin 10
3, the tone arm 60 is positioned at the position of the arm rest 68 and is in the arm locked state.

Next, when the player lid 115 is opened,
As shown in FIG. 5, the rotating arm 111 has its driving end 114 connected to the rear wall of the player lid 115.
15a, the coil spring 111a is attached to the support shaft 112, and has one end in contact with the player housing 106 and the other end locked in the working end 110 in the clockwise direction in the figure. The working end 110 of the seesaw lock plate 10
2, the first contact piece 107 is brought into contact with the lower surface of the first contact piece 107 of the spring 105.
It rotates against the bias. Therefore, the lock pin 103 connected to the seesaw lock plate 102
is the opening 1 provided in the armrest panel 66 above.
04, it becomes an immersive state, and the tone arm 6
0 is released from the locked state.

Note that FIGS. 6 and 7 are plan views of the main parts of the present invention when the player lid 115 is in an open state.

By opening the player lid 115 and operating the operating lever 75, the following automatic player operations can be performed.

This operation will be explained below in relation to the operation of the operating lever 75 and the operation of the fully automatic player with reference to FIGS. 8 to 10.

First, in the first position, where the operating lever 75 is pushed farthest back (upward in FIG. 2), the power off and lifter plate 69 up modes are selected, and then the operating lever 75 is pushed forward (downward in FIG. 2). 9th one step down
In the second position shown in the figure, the power on and lifter plate 69 down mode and manual mode are selected, and in the third position, pulled further forward by two, three, and four steps, auto repeat mode and manual mode are selected, respectively. The repeat count instruction mode is selected.

Here, when the operating lever 75 is set and held at the third position corresponding to the auto-repeat mode, the guide cam 72 receives the force of the spring 74 and rotates clockwise about the support shaft 72a. , the switch operating rod 73 is the switch 4
The operation plate 48b of No. 8 is pushed in to close it. Power is then supplied to the motor 50, which rotates, and the rotation is transmitted to the turntable 53 via the drive shaft 54 and belt 56. Also, operate the operation rod 85 to select the disc playback speed, and then:
The first redirect operation lever 15 is operated to rotate the operating portion 15b.
Rotate the operating piece 11 of the trip 8 clockwise in FIG. 1 about the support shaft 7. At this time, the pawl piece 10 is attached to the pawl protrusion 3 at the bottom of the center gear 1.
The center gear 1 is rotated via the turntable 53 driven by the rotation of the motor 50.
The pawl protrusion 3 pushes out the pawl piece 10, so that the concave notch 6a of the drive gear 6 having the first trip is rotated clockwise, and the gear following the tooth notch 6a is moved to the center. It is rotated by meshing with gear 1. Further, due to the rotation of the drive gear 6, the long pin 6b engaged with the V-shaped cam 35 of the repeat feed lever 33 escapes from the V-shaped cam, and the repeat feed lever 33 The repeat feed lever 33 is rotated clockwise around the center, but as it moves toward the post-escape guide cam 36, the repeat feed lever 33 is again rotated largely counterclockwise, and then the short shaft on the lower surface of the drive gear 6 is rotated. The pins 6c and 6d are the size determining lever 2.
It will be as if you are being guided along the circular line of 8. On the other hand, as the drive gear 6 rotates, the protrusion 20 is guided along the cam groove 14. by the way,
FIG. 1 shows a state in which the auto mechanism is stopped, and at this time, the protrusion 20 is guided into the deep part of the cam groove 14, and therefore the lifter facing the other end 18b of the main lever 18 axis 51
has been moved from the back to the front of the paper in FIG. 1, and therefore, the lifter plate 69 on the back side is in a lowered position. As the drive gear 6 rotates, the cam groove 14 becomes shallower and the protrusion 20 also begins to rise, pushing up one side 18a of the main lever 18 to perform a seesaw action. It is pushed in from the front to the back of the page of FIG. 1, and the lifter plate 69 shown in FIG. 3 gradually rises. Therefore, the tone arm 60 placed on this lifter plate 69 rises. Next, the projecting piece 21 of the main lever 18 contacts the operating pin 25 on the tone arm operating plate 24, and moves the tone arm 60 onto the armrest 68 via the tone arm operating plate 24 and the fan-shaped lever 23. Push back to. Further, the tone arm actuating plate 24 and the fan-shaped lever 23 are related to each other by a spring 24a, so that even if the tone arm actuating plate 24 overstrokes, the movement of the tone arm 60 is transmitted safely and reliably. There is.

Due to the subsequent rotation of the drive gear 6, the protrusion 20 is moved to the folded portion 14a of the cam groove 14.
, the main lever 18 is rotated clockwise in the opposite direction, and the extension portion 1 of the coil spring 19 is rotated in the opposite direction.
9a contacts the pin 25, causing the tone arm operating plate 24 to rotate counterclockwise, that is, the tone arm 60 to rotate in the lead-in direction. Immediately before the start of this lead-in, the sizing lever 28, whose movement had been restricted by the long pin 6b and short pins 6c and 6d, moves to the spring 3.
Rotates clockwise under the force of 2. This clockwise rotation stroke is achieved by appropriately rotating the size selector 57 described above, so that the size selector rod 31 is moved toward the valley cam 29.
By being engaged with either a or 29b, it becomes arbitrarily determined. That is,
This engagement position is LP or EP of tone arm 60.
This is the drop-in point for the disk. In addition,
The tone arm operating plate 24 is the main lever 18
The spring 19 is designed to avoid excessive stress due to overstroke. Thus, the lead-in of the tone arm 60 is completed, but the sizing lever 28 is then returned to the normal position by the short pin 6d, and then the long pin 6b on the drive gear 6 is moved to the repeat feed lever 33. Push the parallel cam 34 on the side of the piece 33a,
As a result, the repeat feed lever 33 is rotated clockwise around the shaft rod 17, and the other piece 33
The projecting pin 39 of the feed piece 38 rotatably attached to the b side pushes once the serrated cam 80 of the operating lever 75 shown in FIG. 2, thereby moving the operating lever 75 rearward. In other words, it is like counting down the number of repeat memories. At this time,
The protrusion 20 of the main lever 18 is connected to the cam groove 1
4, lower the lifter plate 69, and lower the tone arm 60. Also,
At this point, the drive gear 6 also completes one rotation and stops rotating by bringing the center gear 1 toward the toothless portion 6a, and only the turntable 53 rotates freely to perform the performance. Continue. The front part of the serrated cam 80 of the operating lever 75 is continued by a long parallel cam 81, and the rear part is provided with a parallel cam 86 having the same height as the top of the serrated cam 80. Therefore, in combination with the through hole 67, the operating lever 75 is not moved when in the power-off/lifter plate up mode and the infinite auto-repeat mode. Therefore, by indicating these movement amounts on the panel as the number of auto-repeat times, the user can arbitrarily select the number of auto-repeat times. Furthermore, this operating lever 75 controls the above-mentioned on/off operation of the power supply and the lifting and lowering of the lifter plate 69 as desired. The fact that it can be operated with a knob is a significant advance in improving operability.

In this way, in the present invention, the operation lever 75
When the guide cam 72 is in the state shown in FIG. 8, the cam plate 70 is on the mountain cam 72b, and the guide cam 72 is in the state shown in FIG. Push up the lifter plate 69 to raise the tone arm 60, and at the same time push up the switch operating rod 73.
is separated from the operating plate 48b of the switch 48 and cannot be turned on. That is, the motor 50 does not rotate and the turntable 55 is not driven. Next, when the operating lever 75 is pulled forward one step, the guide cam 72 is moved by the spring 74.
The cam plate 70 descends the mountain cam 72b and settles on a low flat surface, the lifter plate 69 descends, the tone arm 60 also descends, and the manual At this point, the tone arm 60 can be operated to lead-in to any position on the disc. In addition, the switch operating rod 73 is located at the same temple as the operating plate 4 of the switch 48.
8b to close the switch, rotate the motor, drive the turntable, and enter the playable state. That is, in this state, the power is on, the lifter plate 69 is down, and each mode of the above-mentioned manual is formed.

That is, to explain in more detail the process of switching from the power-off mode to the power-on and manual mode, in the power-off mode (also the mode in which the lifter plate 69 is thick), the lead to a predetermined band on the disk is As if selecting the in position, manually guide the tone arm 60 onto the band, and then move the operating lever 75
When set to the power-on mode (manual mode), the power is turned on as described above, the turntable starts rotating, the tone arm is lowered by the guide cam 72, and manual lead-in is performed. Here, when the operating lever 75 is set to the above-mentioned power-on mode, during a period until the drive gear 6 (to be described later) starts to rotate, the arm stopper 4 is turned on as shown in FIG.
4 is locked by the projecting pin 41 of the repeat feed lever 33, the hook portion 45 of the arm stopper 44 engages with the upright piece 24b of the tone arm operating plate 24, as in the case of FIG. First, the tone arm can be rotated freely. Therefore, it is also possible to manually lead in the tone arm 60 after operating the operating lever 75 to the power-on mode. In this case, the needle is manually lowered onto the rotating record disk. I will let you do it. When the performance ends and the stylus is about to pass through the last band, the arm operating plate 24 associated with the tone arm 60 also rotates counterclockwise in FIG. It acts on the tip 9a of the second trip 9 attached to the gear 6 as described above, rotates it clockwise around the support shaft 7, and acts on the tip 8a of the first trip 8. Then, the first trip 8 is rotated counterclockwise so that the claw piece 10 engages with the claw protrusion 3 as described above.
As a result, the tone arm automatically performs a lead-out operation and returns to the position on the armrest 69.

By the way, when the drive gear 6 is rotationally driven, the long pin 6b comes off the V-shaped cam 35 of the repeat feed lever 33 as a controlled mechanism, as shown in FIG. Due to the rotation biasing force, the protrusion pin 4 rotates counterclockwise in FIG. 10 about the shaft rod 17.
The above-mentioned locking of one piece 44a of the arm stopper 44 by 1 is released. Here, when the operating lever 75 is located in the power-on mode, the projecting pin 46 of the arm stopper 44 is inserted into the operating lever 75.
When the lock is released, the arm stopper 44 rotates clockwise in FIG. comes into contact with the valley cam surface 84. Arm stopper like this 4
At the rotational position where the No. 4 projecting pin 46 contacts the valley cam surface 84, one piece 44a of the arm stopper 44
is in a state where it can lock the upright piece 24b of the tone arm operating plate 24, as shown by the imaginary line in FIG. However, the solid line in FIG. 10 indicates a state in which the drive gear 6 has begun to be driven to rotate, and when the drive gear 6 further rotates and the lead-out operation is completed, the tone arm actuating plate 24 is in the tenth position. It returns to the position indicated by the virtual line in the figure. Therefore, at almost the end of this lead-out operation, the protrusion 20 of the main lever 18 reaches the folded portion 14a of the cam groove 14, and the subsequent rotation of the drive gear 6 causes the main lever 18 to rotate counterclockwise. However, as is clear from the explanation of FIG. 6 above, the protrusion pin 4 of the arm stopper 44
6 is in contact with the valley cam surface 84 of the operating lever 75, the hook portion 45 locks the upright piece 24b of the tone arm actuating plate 24, so that the tone arm actuating plate 24 is rotated in the counterclockwise direction. is regulated, and the lead-in operation is prevented. When the drive gear 6 is further rotated, the long pin 6b presses the parallel cam 34 of the repeat feed lever 33, and when this lever 33 is rotated clockwise, the projecting pin 39 of the repeat feed piece 38 is pressed against the operating lever 75. The switch 48 is turned off in order to push the serrated cam 80 to move the operating lever 75 to the first position (power off mode position) and rotate the guide cam 72 counterclockwise. In other words, the presence of these two modes makes it possible to arbitrarily and correctly select a predetermined lead-in position by checking the level or number of songs on the disc.

Further, when the operating lever 75 is pulled forward by one or more steps, the guide cam 72 is in the same mode as the second mode, and the power is turned on and the lifter plate 69
continues to be down and enters auto-repeat mode. This auto-repeat mode is
As described above, the projecting pin 46 of the arm stopper 44 is formed by being moved from the valley cam surface 84 of the operating lever 75 by the parallel cam surface 83. That is, by selecting the movement position of the operating lever 75, it is possible to systematically and easily perform operations such as turning the power on and off, switching the lifter plate up and down, manual operation, and switching the auto-repeat operation.

When the autoplayer is operating as described above, the hook member 75a disposed on the operating lever 75 is connected to the pin 75a on the guide cam 72.
2c, the guide cam 72 is rotated as the operating lever 75 moves.
The receiving plate 113 is the above-mentioned seesaw lock plate 102.
comes into contact with the second contact piece 109 of
As shown in FIG.
It is designed to be in a recessed state from the opening 104 of.

That is, in the present invention configured as described above, the player lid 115 is in the closed state, and
When the player is in the inoperative state, the seesaw lock plate 102 is moved between its first and second abutment pieces 10.
7, 109 is not brought into contact with anything, and the tone arm 6 is biased by the spring 105.
0 at the armrest 68 position of the armrest board 66. Next, the player lid 11
If 5 is opened, the seesaw lock plate 1
02 is rotated by the rotating arm 111 against the bias of the spring 105 to release the above-mentioned arm lock.

Additionally, when the player is in operation,
The receiving plate 113 is brought into contact with the second abutting piece 109 of the seesaw lock plate 102, and the above-mentioned arm locking is prohibited, so that even if the above-mentioned player lid 115 is closed, the arm will not be locked.

As described above, the present invention includes a seesaw lock plate that cooperates with the armrest to lock the tone arm in the armrest position, a player lid, and a first control mechanism that is linked to the opening/closing operation of the player lid. , a manual operation lever for setting the operation/non-operation of the record player, and a second control mechanism interlocked with the manual operation lever, and when the player lid is in the open state, the player lid The tone arm is configured to move the first control mechanism and release the lock state of the tone arm by the seesaw lock plate through the first control mechanism, and when the manual operation lever is set to the operating position. Since the second mechanism is moved and the locking state of the seesaw lock plate is released via the second control mechanism, the tone arm is unlocked when the player is operated. Because they are linked, the user can operate the tone arm without having to worry about unlocking it.
The tone arm can be reliably unlocked to protect the tone arm, and if the player lid is closed and the player is inactive, the tone arm is automatically unlocked. Since the tone arm is locked, the user can securely lock the tone arm without having to bother with operations to lock the tone arm in the same way as when releasing the lock mentioned above, and the tone arm is reliably protected. becomes.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the back side of the player chassis of a fully automatic player to which the present invention is applied;
The figure is also a plan view from the top side. Third
The figure is a perspective view showing the main parts of the present invention, and the fourth
5 and 5 are side sectional views showing each operating state, and FIG. 6 is a plan view of the main parts.
FIG. 7 is a side sectional view. FIG. 8 is a perspective view of the main parts of the operating section of the fully automatic player, and FIGS. 9 and 10 are schematic bottom views of the main parts shown from the back of the player chassis, respectively, showing different operating states. 60...Tone arm, 66...Armrest board, 68...Armrest, 75...Operation lever, 100...Lock protrusion, 102...Seesaw lock plate, 103...Lock pin, 105...
Spring, 106...Player housing, 107,
109... Contact portion, 111... Rotating arm, 11
3...Socket plate, 115...Player lid body.

Claims (1)

[Claims] 1. A seesaw lock plate that locks the tone arm in the armrest position in cooperation with the armrest, a player lid, a first control mechanism that is linked to the opening/closing operation of the player lid, and a control mechanism that controls the operation and non-operation of the record player. It includes a manual operation lever for setting an operation, and a second control mechanism interlocked with the manual operation lever, and when the player lid is in an open state, the player lid controls the first control mechanism. is configured to move the tone arm and release the locked state of the tone arm by the seesaw lock plate via the first control mechanism, and the second control mechanism is configured to move the tone arm when the manual operation lever is set to the operating position. A locking device for a tone arm, characterized in that it is configured to move the tone arm and release the locked state by the seesaw lock plate through the second control mechanism.