JPS6152525B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a readout mechanism for a fully automatic player, and in particular to a readout mechanism for a size setting cam that sets the position of a size determining member directly connected to a tone arm and sets a drop-in point. The present invention relates to a system that prevents the sizing member from colliding with the sizing cam during operation, thereby preventing abnormal impact noise from being generated.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 shows a lead-out mechanism according to the present invention including a drop-in point setting mechanism, and is a plan view showing the player body in an upside-down state, and FIGS. 2 and 3 are FIG. 2 is an exploded perspective view of the lead-out mechanism as seen from the top side of the player body, and FIG. 3 is an exploded perspective view of the player body as seen from the bottom side.

30 in the figure is an arm shaft of a tone arm 132 rotatably supported by a bearing;
A lead wire connected to the cartridge can be drawn upward from the cylindrical hole 31 of the arm shaft 30. This arm shaft 30 has a screw 32.
The arm drive lever 33 is fixed at the boss portion thereof. A return lever 34 is rotatably mounted on the arm drive lever 33 by being loosely fitted into the boss portion.
35 is a coil spring that is interposed between the locking piece 36 of the arm drive lever 33 and the locking piece 37 of the return lever 34, and biases the return lever 34 in the counterclockwise direction in FIG. ,
The rotationally biased position of the return lever 34 by the coil spring 35 is determined by a screw 39 screwed into an upright piece 38 protruding from the arm drive lever 33.
an upright piece 4 whose tip protrudes from the return lever 34;
0 and is regulated to a predetermined position by adjusting the screwing amount. Reference numeral 41 designates a locking piece that stands up on the arm drive lever 33 and is inserted into an arc-shaped notch groove 42 provided in the return lever 34 to restrict and guide the rotation of the return lever 34. Reference numeral 43 designates an engagement pin protruding from the lower end of the return lever 34. Reference numeral 44 denotes a rotatable support shaft installed at one end of the arm drive lever 33. A knob 45 with a knurled periphery is provided at the upper part of this support shaft 44, and an eccentric cam 46 is provided at the lower part of the support shaft 44. installed.

Next, reference numeral 47 denotes an arm operating lever rotatably attached to the boss portion of the arm driving lever 33, and a projection 48 provided on the arm operating lever 47 and a projection on the arm driving lever 33 A coil spring 50 is stretched between the protruding piece 49 and the arm actuating lever 47 against the arm driving lever 33 in the counterclockwise direction in FIG. Further, a locking piece 51 integrally provided on the arm operating lever 47 is partially in contact with the right circumferential surface of the eccentric cam 46 as shown in FIG. A contact piece 52 is provided that contacts a size setting cam plate 63, which will be described later, on the board. Furthermore, an arm drive pin 5 is attached to the tip of the arm actuating lever 47 between them.
3 and a locking pin 54 is suspended from inside thereof. Note that by rotating the knob 45,
The relative angle of the arm operating lever 47 with respect to the arm driving lever 33 can be finely adjusted. By this fine adjustment, the position of the arm actuating lever 47 relative to a plate-shaped size setting cam plate 63, which is a size setting cam for setting the size of a record, which will be described later, is adjusted with high precision.

Next, 55 is a size reset lever made of a molded body of synthetic resin, and is rotatably provided around the boss portion of the arm shaft 30. This size reset lever 55 is provided with a strip-shaped spring piece 56, and this spring piece 56 comes into contact with the left side surface in FIG. It is biased counterclockwise in the figure. Further, a lead-in release pin 58 and a regulation pin 59, which is a locking member whose rotation is regulated by contacting one edge of the main lever, which will be described later, are suspended from the size reset lever 55, and a regulation pin 59 is suspended from the size setting cam plate. A regulating cam piece 60 that regulates the rotation of 63 is provided. The size reset lever 55 is biased to rotate counterclockwise in FIG. 1 by pushing the clutch cam against the lead-in release pin 58, which will be described later.
The size select lever 55 is attached to the end surface 201a of the
is regulated by contact. Further, the size reset lever 55 is provided with an arcuate long hole 62, into which the locking pin 54 of the arm operating lever 47 is loosely fitted.

Reference numeral 63 denotes a record size setting cam plate, which is rotatably mounted around a support shaft 64 planted on the board, and the arm operating lever 47 is attached to its outer edge.
First, second, and third abutting portions 65, 66, 67 that lock the upper contact piece 52, and a locking protrusion 68 that faces the regulation cam piece 60 of the size reset lever 55.
and a locking protrusion 69 which is a locked part that engages with a locking protrusion 86 which is a locking part of a main lever 78 to be described later and moves following the movement of this main lever 78.
and a locking piece 70 of a coil spring 113 that urges the size setting cam plate 63 in the clockwise direction in FIG. Further, on the lower surface side of the size setting cam plate 63, a size selection lever 72 whose one end is locked to a size selection link 71 that is operated by manual operation is disposed, and this size selection lever 72 is attached to a support shaft. It is rotatably attached around 73. Furthermore, size selection lever 7
A guide pin 74 is integrally provided at the other end of the 2, and this guide pin 74 is connected to the first, second and third locking cams 75, 76, 77 formed on the lower surface of the size setting cam plate 63. When the size selection link 71 operates, the size setting cam plate 63 is rotated via the size selection lever 72, and the first, second, and third abutting portions are The amount of movement of the contact piece 52 relative to 65, 66, and 67 is restricted, and the rotation of the arm operating lever 47 is restricted.

78 is a support shaft 79 planted on a substrate (not shown)
It is a main lever that rotates around
It is attached so as to be slid along a heart cam 82 provided above. An operating piece 83 for operating a switch 84 is provided on one side of the main lever 78, and a brake pin 85 is installed adjacent to this operating piece 83. Further, on the other side of the main lever 78, a locking piece 86 is provided as a locking portion that is engaged with a locking protrusion 69 that is a locked portion of the size setting cam plate 63, and furthermore, a locking piece 86 is provided as a locking portion that is engaged with a locking protrusion 69 that is a locked portion of the size setting cam plate 63. When the main lever 78 is rotated counterclockwise in the direction of the arrow X in FIG.
A protruding piece 87 is provided that comes into contact with. and,
This projecting piece 87 rotates the size setting cam plate 63 in the counterclockwise direction in FIG. 1 via the upright piece 88 when the main lever 78 rotates in the direction of arrow X in FIG. The first, second, and third abutting portions 65, 66, and 67 are operated so as to escape from contact with the contact piece (sizing member) of the arm operating lever 47. Further, in the middle of the main lever 78, there is provided an arm lifter operating piece 89 having an inclined surface bent downward, and when the main lever 78 is in the position shown in FIG. position so that the tone arm is raised higher than the record surface. Furthermore, the main lever 78
A regulating piece 90 that is engaged with a regulating pin 59 of the size reset lever 55 is provided on one edge of the size reset lever 55 .

In addition, the guide pin 80 of the main lever 78
L-shaped piece 91 formed on the other end side of the opposite side
A notch 92 is provided at the end of the holder, and a mounting piece 93 formed by providing this notch 92 has a clutch cam body 95 that is rotatable about a support shaft 94.
are installed as shown in FIG. The clutch cam plate 95 is made up of circular arc-shaped cam pieces 97 and 98 that are symmetrical to the support shaft 96 and protrude in a circular arc shape. In addition, this arcuate cam piece 9
7, 98 has a turnip-shaped thin guide piece 99 on its lower surface.
are arranged in series, and on the back side of this guide piece 99, first, second, and third notched cams 10 are provided as shown in FIG.
A star-shaped cam with numbers 0, 101, 102 is integrally provided.

An arm 103 is attached to be rotatable about a support shaft 104 planted on the lower surface of an L-shaped piece 91 formed on the other end side of the main lever 78 described above. As shown in FIG. 6, a rubber roller 106 that rotates around a support shaft 105 is attached to one end of this arm 103, and a coil spring 207 is secured to the other end, so that the arm 103 is rotated around a support shaft 105.
4 in the clockwise direction in FIG.
He is trying to engage with the notch cams 100, 101, and 102 of.

Furthermore, reference numerals 107 and 108 are first and second reset members provided under the rotation locus of the clutch cam body 95, and are used to set a set screw 10 on a substrate (not shown).
The projecting pieces 107a and 108a attached to the clutch cam body 9 and 110 and projecting from their tips abut against the arcuate cam pieces 97 and 98 of the clutch cam body 95, and rotate the clutch cam body 95 in either direction. It seems to be energizing. 111 is the support shaft 1 on the above board
This is a starting lever for the drive gear 81 that rotates around the drive gear 81, and one end of the lever rotates around the drive gear 81.
A locking pin 114 is fixed to a projecting piece 113 near a support shaft 112 of this starting lever 111. An L-shaped operating rod 116 having a magnet 115 at its tip is rotatably attached to the support shaft 112, and this magnet 115 faces above an electromagnet 118 supported by two brackets 117. The magnet 115 is pulled to the left in the direction of the arrow in FIG. 1 by the biasing force, and the starting lever 111 is biased clockwise in FIG. I will finish it. 1
11a is a contact piece formed on the tip side of the starting lever 111. Note that between the bracket 117 and the locking piece 70 on the size setting cam plate 63, there is a
A coil spring 119 is tensioned and constantly urges the size setting cam plate 63 to rotate in the clockwise direction in FIG.

Reference numerals 120 and 121 denote a brake lever and its auxiliary lever, respectively, which freely rotate around a support shaft 122 set on the base plate, and one end of each of these levers 120 and 121 is provided with a brake lever that rotates in opposite directions. Dynamic biasing coil spring 123
is installed. The above brake lever 12
An upright piece 124 is provided at the other end of the arm drive lever 33, and a brake shoe 125 made of felt or the like faces the arcuate outer circumferential surface 33a of the arm drive lever 33 so as to be able to move toward and away from the upright piece 124. 126
is an adjustment screw screwed into the brake lever 120, and the tip of this adjustment screw 126 contacts the upright piece 127 of the auxiliary lever 121, so that the timing of the brake can be adjusted as desired by protruding and retracting the adjustment screw 126. It's getting old. Further, the auxiliary lever 121 has a notch 128 and an inclined surface 129.
are provided, and these notches 128 and inclined surfaces 12
A brake pin 85 provided on the main lever 78 is guided along one side edge of the main lever 9 and the auxiliary lever 121 having these. That is, the brake pin 85 is connected to the notch 128 and the inclined surface 12.
9, the brake shoe 125 is not pressing the outer peripheral surface 33a of the arm drive lever 33. A coil spring 130 is stretched between one end of the auxiliary lever 121 and the reset plate 107, and acts to press the right side surface of the auxiliary lever 121 in FIG. 1 against the brake pin 85.

Next, the operation of the tone arm drive device having such a configuration will be described.

First, power is supplied to drive the turntable, and the drive gear 131 directly connected to its rotating shaft is driven. Also, by operating the size selection link 71, the guide pin 7 on the size selection lever 72 is
The first, second and third locking piece cams 75, 76, 77 provided on the size selection cam plate 63 of No. 4
1 to set the rotation angle of the size setting cam plate 63 corresponding to the size of the record. In this way, the abutting relationship between the contact piece 52 of the arm operating lever 47 and any one of the abutting portions 65, 66, and 67 is established. That is,
Tone arm 1 directly connected to arm operating lever 47
Thirty-two drop-in points will be defined. Next, when the operation start button (not shown) of the auto player is operated, the electromagnet 11 is activated.
8 is energized and the magnet 115 on the L-shaped operating rod 116 is pulled to the left in the direction of the arrow in FIG. 1, thereby pushing the locking pin 114 in the same direction. Then, the starting lever 1
11 is momentarily rotated clockwise in FIG. 1 about the support shaft 112, and a trip (not shown) on the drive gear 81 is operated to mesh the drive gear 81 with the drive gear 131.
Due to this engagement, the drive gear 81 performs lead-in rotation in the direction of arrow A in FIG. 1 to a notch (not shown) at a half-rotation position. Above drive gear 8
1 rotation, the main lever 78 which contacts the guide pin 80 with the heart cam 82 integrated with the main lever 78
rotates slowly around the support shaft 79 in a counterclockwise direction, that is, in the direction of the arrow X in FIG. This rotation of the main lever 78 causes the brake pin 8 to
5 gradually rides on the right side edge of the notch 128 of the auxiliary lever 121, and the clutch cam body 95 also moves in the same direction, in the direction of arrow C in FIG. When the brake pin 85 rides on the linear right edge of the auxiliary lever 121, the brake shoe 125 of the brake lever 120 associated with the auxiliary lever 121 touches the outer peripheral surface 33a of the arm drive lever 33. Press lightly. While maintaining this lightly pressed state, by rotating the main lever 78, the operating piece 96 of the clutch cam body 95 is moved to the arm driving pin 53.
and lead-in release pin 58 are both pressed in the direction of arrow C in FIG. Force,
Lead-in of the tone arm 132 is performed. At this time, the locking protrusion 6 engaged with the locking piece 86
The size setting cam plate 63 having 9 is rotated clockwise in FIG. 1 about the support shaft 64 by the coil spring 119, and the guide pin 74 of the size selection lever 72 It stops at a position where it abuts against any one of the third locking cams 75, 76, and 77. Therefore, the first, second and third abutting parts 65, 66, 67 are close to the contact piece 52 of the arm operating lever 47, and one of these abutting parts 65, 66, 67 is close to the contact piece 52 of the arm operating lever 47. to face. Subsequently, the contact piece 52 abuts against, for example, the first abutting portion 65 of the first, second, and third abutting portions 65, 66, and 67, and the arm operating lever 47 rotates. is temporarily stopped and tone arm 1
The rotation of 32 is temporarily stopped. That is, the drop-in point of the playback needle of the tone arm 132 relative to the record is set. Here, when the main lever 78 continues to rotate in the direction of the arrow X in FIG.
6 is pushed open by the arm drive pin 53 which is forcibly stopped as described above, and the clutch cam body 95 is rotated counterclockwise in FIG. 1 about the support shaft 94. The rubber roller 106 is fitted into the second notch cam 101 to the third notch cam 102 located at the center among the first, second and third notched cams 100, 101, 102, and the fitted state is Retained temporarily. In this state, the brake pin 85 moves the side surface of the auxiliary lever 121 toward the inclined portion 129, and the clutch cam body 95 moves toward the first inclined portion 129 as described above.
After being rotated counterclockwise in the figure, the brake pin 85 reaches the inclined portion 129. Therefore,
When the arm rotation lever 33 is released from being pressed by the brake shoe 125, the projecting piece 87 of the main lever 78 pushes the upright piece 88 of the size setting cam plate 63, and this size setting cam plate 6
3, the first locking cam 65 is connected to the arm operating lever 47.
It is moved so as to escape from the contact piece 52 of. Therefore, the arm driving lever 33 is the same as the arm operating lever 4.
7, the rotation becomes free, and the record is automatically played back from the drop-in point by the guiding force of the sound groove. Furthermore, during this time,
An operating piece 89 of the main lever 78 is adapted to lower the arm lifter.

Even from the above-mentioned state, the main lever 78
rotates in the direction of the arrow X in FIG. 1, one cam piece 98 of the clutch cam body 95 abuts against the protruding piece 108a of the second reset member 108, and this clutch cam body 95 rotates in the clockwise direction in FIG. The clutch cam 95 is returned to its original rotational position as the rubber roller 106 is fitted from the third notched cam 102 to the second notched cam 101. Furthermore, the size reset lever 55 is pushed in by the protruding piece 87 of the size setting cam plate 63 to push the upright piece 88.
The locking protrusion 68 that is in contact with the regulating cam piece 60 engages with this regulating cam piece 60. The size reset lever 55 is held in its engaged state by a spring piece 56 of the mold.

Next, in the above state, when the reproduction needle passes through the final tone groove of the record, the tone arm 132 that is linked to the movement of the reproduction needle and the return lever 34 integrated as described above are connected to the arm shaft 30.
It is rotated counterclockwise in Figure 1 around .
The engagement pin 43 presses the upright piece 111a of the starting lever 111, and this starting lever 111
It is rotated in the clockwise direction in FIG. 1 about the support shaft 112. As a result, the drive gear 81
By operating the other trip above, the drive gear 81 of the half circumference following the other notch different from that during the lead-in operation described above is brought into mesh with the drive gear 131. As a result, the drive gear 81 rotates again, and the main lever 78 is driven by the guide pin 80 along the heart cam 82 in the clockwise direction of the arrow Y in FIG. Lead-out of arm 132 is started. That is, by rotating the main lever 78 in the direction of arrow Y, the brake pin 85 is moved along the inclined surface 129 to the auxiliary lever 121.
The brake lever 120 restricts the rotation of the arm drive lever 33 via the brake shoe 125, and
The contact piece 87 is the upright piece 8 of the size setting cam piece 63.
8, the actuating piece 89 of the arm lifter moves to raise the arm lifter, causing the tone arm to float above the record. Here, the size setting cam plate 63 is connected to the coil spring 119.
However, the above-mentioned regulating cam piece 6
0 and the locking protrusion 68, its return rotation is temporarily restricted. At this time, the clutch cam body 95 also separates from the second reset plate 108 and rotates together with the main lever 78 in the direction of arrow D in FIG. Subsequent rotation of the main lever 78 in the direction of arrow Y in FIG. Push it into. Due to this push-in operation, the tone arm 132 integrated with the arm operating lever 47 having the arm drive pin 53 is urged in the lead-out direction, and finally the tone arm 132 is stopped by the rotation prevention action of the arm rest, and the arm operating lever 47 Conversely, the actuating piece 96 of the clutch cam body 95 is moved to the support shaft 94 by the arm drive pin 53.
It is rotated clockwise in FIG. 1 about the center. In this state, the first clutch cam body 95
The rubber roller 106 is fitted into the notched cam 100 to be held. Immediately before the main lever 78 ends its operation, the regulating pin 59 of the size reset lever 55 is rotated clockwise in FIG. The engagement with the stop projection 68 is released, and the arm operating lever 47 returns to its original position. Further, due to the rotation of the main lever 78, the cam piece 97 of the clutch cam body 95 abuts against the protruding piece 107a of the first reset member 107, and the clutch cam body 95 is rotated counterclockwise in FIG. As the rubber roller 106 rotates, the first notched cam 10
By fitting into the second notch cam 101 from 0,
As the clutch cam body 95 returns to its original state, the brake pin 85 fits into the notch 128, and the entire process of the automatic record playing mechanism is completed.

By the way, during the lead-in operation, the contact piece 52, which is a sizing member, is connected to the sizing cam 6.
3, the first, second and third abutting portions 65, 66, 6
7, the tone arm 132 is temporarily stopped, and the drop-in point of the playback needle relative to the record is determined. Thereafter, due to the swinging of the main lever 78, the projecting piece 87 provided on the main lever 78 abuts against the upright piece 88 of the size setting cam plate 63, and pushes this, causing only this size setting cam plate 63 to move from the contact piece. As a result of this movement, the locking protrusion 68 of the size setting cam plate 63 comes into contact with the regulating cam piece 60 of the size reset lever 55, and the size reset lever 55 touches the spring piece 56. It is urged to rotate in the counterclockwise direction in FIG. If this biasing continues further, the regulating cam piece 60 and the locking projection piece 68 engage with each other elastically. On the other hand, when the lead-out operation is started in such a state, the main lever 78 swings in the lead-out direction, the size setting cam plate 63 rotates clockwise in FIG. It collides with the contact piece 52 and generates a harsh abnormal sound.
However, as shown in the figure, since the engagement between the regulating cam piece 60 and the locking protrusion piece 68 is still maintained, the above-mentioned collision is avoided and the above-mentioned abnormal noise is prevented.
The above-mentioned engagement is performed by the regulating piece 9 of the main lever 78.
0, the regulating pin 59 of the size reset lever 55 is pushed away and released, returning to the state before the lead-in operation.

As described above, the present invention provides a drive gear that is selectively associated with a drive shaft of a turntable and rotates, a main lever that swings as the drive gear rotates, and a drive gear that is provided on the main lever. a size setting cam having a locked part that engages with the locking part, rotated by the swinging of the main lever, and regulating the rotational position of the tone arm in the lead-in direction; and a size setting cam that is integrated with the tone arm. a clutch member rotatably attached to the main lever; a clutch member rotatably attached to the rotation shaft of the tone arm opposite to the size setting cam; and a size reset member provided with a locking member whose rotation is regulated by contacting the size reset member, and during lead-in operation, the clutch member rotates the size determining member by swinging the main lever. As the tone arm is rotated in the lead-in direction and the locking portion of the main lever and the locked portion of the size setting cam are in an engaged state, as the main lever rotates; The sizing cam is rotated to collide with the sizing member to restrict rotation of the sizing member to define a lead-in position of the tone arm, and then the main lever is further rotated. The size setting cam and the size reset member are engaged with each other, and during the lead-out operation, the clutch member rotates the size determining member by swinging the main lever, and the tone arm is rotated in the lead-out direction. At the same time, by holding the size setting cam and the size reset member in an engaged state, rotation of the size setting cam is prevented and collision with the size determining member is avoided, and the tone arm is set on the armrest. After the rotation in the lead-out direction is restricted,
Since the main lever presses the locking member to rotate the size reset lever and release the engagement between the size setting cam and the size reset lever, the drop-in point can be set accurately. At the same time, it eliminates the collision noise between the sizing cam and the sizing member when the tone arm is read out, allowing quiet and smooth autoplayer readout operation, which is extremely useful in practice. be.

[Brief explanation of the drawing]

FIG. 1 shows a lead-out mechanism according to the present invention including a drop-in point setting mechanism, and is a plan view of the player body turned over, and FIGS. The main parts of the out mechanism are shown, and FIG. 2 is an exploded perspective view seen from the top side of the player main body.
The figure is an exploded perspective view of the player main body viewed from the bottom side, Figure 4 is a perspective view of the main lever, Figure 5 is a bottom view of the clutch cam body, and Figure 6 is a view of the main lever from below. FIG. 47... Arm operating lever, 52... Contact piece serving as a sizing member, 53... Main lever, 55
... Size reset lever, 59 ... Regulation pin that is a locking member, 63 ... Size setting cam plate, 6
5, 66, 67...first, second, and third abutment parts, 72...size selection lever, 74...guide pin, 75, 76, 77...first, second, and third
Locking cam, 78...Main lever, 81...Drive gear, 95...Clutch cam body, 100...
...first notch cam, 101...second notch cam,
102...Third notched cam, 106...Rubber roller, 107...First reset member, 108...
Second reset member, 132...Tone arm.

Claims (1)

[Scope of Claims] 1. A drive gear that is selectively associated with the drive shaft of the turntable and rotates, a main lever that swings as the drive gear rotates, and a lock provided on the main lever. a size setting cam, which has a locked part that engages with the tone arm, is rotated by the swinging of the main lever, and regulates the rotational position of the tone arm in the lead-in direction; a sizing member that moves; a clutch member that is rotatably attached to the main lever; a clutch member that is rotatably attached to the rotation shaft of the tone arm opposite to the size setting cam;
and a size reset member provided with a locking member that contacts the main lever to restrict rotation, and during lead-in operation, the clutch member rotates the sizing member by swinging the main lever. This causes the tone arm to rotate in the lead-in direction, and the main lever rotates when the locking portion of the main lever and the locked portion of the size setting cam are in an engaged state. Accordingly, the size setting cam is rotated to collide with the size determining member to restrict the rotation of the size determining member to define the lead-in position of the tone arm, and then the main lever is further rotated. When the main lever swings, the size setting cam and the size reset member are engaged with each other, and when the main lever swings, the clutch member rotates the size determining member to lead out the tone arm. By rotating the size setting cam in the direction and maintaining the engagement state between the size setting cam and the size reset member, rotation of the size setting cam is prevented and collision with the size determining member is avoided, and the tone After the rotation of the arm in the lead-out direction is restricted by the armrest, the main lever presses the locking member to rotate the size reset lever and release the engagement between the size setting cam and the size reset lever. A lead-out mechanism for a fully automatic player, which is characterized in that it is configured to: