JPS5830666B2 - Record player repeating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a repeat performance device for a record player.

The repeat play device of a conventional record player has two components: a limit needle that is always biased by a spring in the direction of rotation of the pickup arm during record play, and a restraint needle that is fixed to the pickup arm. However, in this conventional system, when performing a record without performing repeated performances,
Since the restriction needle is always pushed by the restriction needle, the spring force of the restriction needle is applied to the pickup arm via the restriction needle in the inner circumferential direction of the pickup arm while the record is being played, causing the playback needle to press the sound groove. This has the disadvantage that pressure is applied to the inner wall of the record, which may impair the record playback characteristics during performance.

The present invention has been made in view of the drawbacks of the prior art described above, and an object of the present invention is to prevent force from being applied to the rotational direction of the pickup arm during performance, even when the performance is not repeated. It is an object of the present invention to provide a repeat performance device for a record player that allows the playback needle to follow the sound groove without difficulty and does not damage the record playback characteristics. The knob can be rotated around the pickup shaft, and
is loosely fitted so as to be movable in the axial direction along the pickup shaft, and is rotated based on the rotation of the pickup shaft when the first knob is not operated;
When the first knob is operated, it is moved in the axial direction of the pickup shaft in conjunction with the first knob,
a first Pu stopper that is pressed against a stationary object by the force in the axial direction and stops rotating; an outermost circumference position setting mechanism that sets the outermost circumference position of a portion of the record that is desired to be played repeatedly; A second knob is loosely fitted around the pickup shaft so as to be rotatable and movable in the axial direction along the pickup shaft, and when the second knob is not operated, the second knob is rotatably fitted around the pickup shaft. When the first knob is operated, the pickup shaft is moved in the axial direction of the pickup shaft in conjunction with the second knob, and is pressed against a stationary object by the force in the axial direction to stop rotation. a second Pu stopper,
an innermost circumference position setting mechanism for setting the innermost circumference position of a portion of the record that is desired to be played repeatedly; an electric contact that turns on and off according to the movement of the first Pu stopper and the second Pu stopper; An electromagnet operated by an electric contact, a main plate that swings in conjunction with the rotation of the rotating shaft of the record due to the operation of the electromagnet, and a Pu plate that is fixed to the pickup shaft and rotates integrally with the pickup shaft. a Pu moving pin fixed to the Pu plate and reciprocating between the first Pu stopper and the second Pu stopper;
a first plate that returns the u-movement pin to the performance start position; and a second plate that is swingably attached to the none plate and returns the second Pu stopper to the performance start position at the end of the performance.
a repeating mechanism that is composed of a plate and a slide section that is made of a slope provided on the main plate and that raises and lowers the pink arm, and that repeatedly plays between the outermost circumferential position and the innermost circumferential position; and a third knob. a slide plate that disengages the stoppers of the first and second knobs in conjunction with the third knob and restores them to their original positions; a microswitch that excites an electromagnet; and a release mechanism that releases the outermost position setting mechanism and the innermost position setting mechanism; the second Pu stopper is brought into sliding contact with the Pu plate; and the first Pu stopper is connected to the second Pu stopper.
By slidingly contacting the stopper, the first Pu stopper and the second Pu stopper are rotated together with the pickup shaft, and during record playing, the first plate is moved by the Pu stopper. It is characterized by being retracted from the pin.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a repeat performance device for a record player according to the present invention will be described below with reference to the drawings.

FIG. 5 is a longitudinal sectional view of the position adjustment mechanism provided below the rotation center of the pickup arm, and FIG. 11 is an exploded view of the position adjustment mechanism.

A pivot shaft 17 is fixed to the lower part of the pickup arm 52, and serves as a central axis of rotation for horizontal rocking of the pickup arm.
The arm base, which is fixed to the motor board, is rotatably inserted through it.

A cylindrical portion 18a and a flange portion 18 are provided on the lower surface of the motor board.
B Tokara base shaft 18 will be described later Holder 1
3, and a pivot shaft is rotatably fitted and pivotally supported inside the cylindrical portion 18a.

The lower end of the pivot shaft 17 protrudes from the lower end of the cylindrical portion 18a of the base shaft 18, and also extends from the lowermost opening of the holder 13 that houses various components of the position setting mechanism including the base shaft 18. protrudes in the direction.

A plate 188' is fixed to the protruding lower end portion of the pivot shaft 17 with machine screws, and rotates as the pivot shaft 17 rotates.

This plate 18a' has an arm 18b' extending radially outwardly of the pivot shaft 17;
A Pu moving pin 31 is provided at the tip of the arm 8b' and extends vertically upward from the arm 18b' toward the pickup arm 52 outside the holder 13.
An electric contact 32 is attached to the moving pin 31.

A lead wire connected to an electromagnet 37, which will be described later, is connected to this electrical contact 32.

The holder 13 has three cylindrical parts with different diameters, namely an upper cylindrical part 13a, a middle cylindrical part 13b, and a lower cylindrical part 13c.
The upper cylindrical part 13a has an outwardly protruding flange part on the upper end, an inward flange part on the inner wall of the lower cylindrical part 13c, and a window 14' on the side surface of each cylindrical part.
It has a structure in which 15', 29', and 33 are formed respectively.

An electric contact 36 is attached to the bottom outer wall surface of the middle cylindrical portion 13b, and the electric contact 36 is attached to the electromagnet 3.
The lead wire connected to 1 is connected.

An annular cam 28 is loosely fitted inside the lower cylindrical portion 13c of the holder 13 and is locked by the inward flange portion so as not to fall downward.

The cam 28 has slopes 28b and 28b' formed on its upper surface, and an arm 28a extending radially from the side surface.

The arm 28a protrudes outward from a window 29' of the lower cylindrical portion 13c, and can swing horizontally to rotate the cam 28.

Above the cam 28, there are slopes 28b, 2 of the cam 28.
Slopes 29a, 29 that fit in sliding contact with 8b'
An annular cam 29 having a mark a' formed on its lower surface is fitted, and pillars 29 b and 29 b' extending upward are protruded from the upper surface of the cam 29 .

Springs 72 and 73 are fitted into the pillars 29b and 29b', and the pillars 29b and 29b'
The tip of the notch 30a, 3 of the annular plate 30
It penetrates through 0 a' and protrudes upward.

The annular plate 30 is fixed to the bottom surface of the middle cylindrical part 13b of the holder 13 with screws, with the upper end of the spring 72.73 locked, so that the spring 72.73 eventually It will be energized downward.

And cam 28. A cylindrical Pu stopper 20 is loosely fitted into the openings of the cam 29 and the annular plate 30.

The cylindrical portion 18a of the base shaft 18 is slidably fitted into the cylindrical interior of the Pu stopper 20, so that it can move in the vertical direction and in the rotational direction.

Further, the lower part of the Pu stopper 20 is formed into an outward flange shape, and this part loosely fits into the bottom opening of the lower cylindrical part 13c of the holder 13, and is placed on the plate 18a' in the rotation direction. It is slidably placed on the

For this reason, the Pu stopper 20
As play N8a' rotates due to the rotation of T, they rotate together.

Further, the upper end of the Pu stopper 20 is formed with an outward flange portion 20b and an arm 20a projecting radially outward from the flange portion 20b. b, 29
It faces vertically with a small gap from the tip of b'.

The arm 20a protrudes outward from the window 33 of the holder 13 so as to be able to swing in the horizontal direction, so that it can come into contact with the Pu moving pin 31 of the plate 183' from behind in the plane of FIG. It has become.

At the tip of the arm 20a, an electrical contact 34. is electrically connected with a spacer 57 extending downward.
35 is provided, and the electric liquid point 34 is connected to the Pu moving pin 31.
The electrical contact 35 is placed in a position where it can come into contact with the electrical contact 32 provided on the holder 13, and the electrical contact 35 faces the electrical contact 36 provided on the holder 13 in the vertical direction with a small gap therebetween.

An annular cam 12 is rotatably fitted to the bottom inner peripheral edge of the middle cylindrical portion 13b of the holder 13, and this cam 12 has an arm 12a projecting from the side surface extending radially outward. At the same time, slopes 12b and 12b' are formed on the upper surface thereof.

The arm 12a projects outward from the window 14' of the holder 13, and can rotate the cam 12 by swinging in the horizontal direction.

Above the cam 12, there are slopes 12b, 12b' of the cam 12.
A cam 1 having slopes 14a and 14a' that slide into and fit with the cam 1.
4 is fitted, and pillars 14b and 14b' extending upward are protruded from the upper surface of the cam 14.

This pillar 14b, 14b' has a spring 70.7.
1 is fitted, and furthermore, a pillar 14b.

The tip of 14b' is the notch 16a of the annular plate 16.

It penetrates through 16a' and protrudes upward.

The annular plate 16 is attached to the upper cylindrical portion 1 of the holder 13 with a screw while the upper end of the spring 70.71 is locked.
Since it is fixed to the bottom of spring 3a, the spring 7
0.71 will bias cam 12.14 downward.

Furthermore, a cylindrical Pu stopper 15 is loosely fitted into the openings of the cam 12, cam 14, and annular plate 16.

The cylindrical portion 18a of the base shaft 18 is slidably fitted into the cylindrical interior of the Pu stopper 15, and is capable of vertical and rotational movement.

Further, the bottom surface of the cylindrical portion of the Pu stopper 15 is rotatably placed on the top surface of the flange portion of the Pu stopper 20, so that it can rotate together when the Pu stopper 20 rotates. .

The upper end of the Pu stopper 15 has an outward flange portion 15.
b is formed, and an arm 15a that extends horizontally outward in the radial direction projects from this flange portion 15b.

The lower surface of this flange portion 15b includes the aforementioned pillar 14b,
It vertically faces the tip of 14b' with a small gap therebetween.

The arm 15a protrudes outward from the window 15' of the holder 13 so as to be able to swing in the horizontal direction, and is placed in a position where it can come into contact with the Pu moving pin 31 of the plate 18a' from the front in the plane of FIG. As a result, the Pu moving pin 31 is connected to the arms 15a of both Pu stoppers 15.20.
, 20a.

A base shaft 18 is disposed above the Pu stopper 15 with a small distance between the upper surface of the flange portion 15b and the lower surface of the flange portion 18b.
The flange portion of the holder 13 is fixed to the motor board with screws.

One end of the connecting plate 10 is pivotally connected to the arm 12a of the cam 12 of this position setting mechanism, and one end of the connecting plate 27 is pivotally connected to the arm 28a of the cam 28. The other end is connected to a knob portion for actuating the positioning mechanism.

Next, this knob part will be explained.

In FIG. 1, Knob 1 is a knob for setting the first position of the part of the record that you want to play repeatedly, and Knob 2 is a knob for setting the last position of the part that you want to play repeatedly. Knob 3 is a knob for canceling the settings of Knob 1 and Knob 2 at the same time.

As shown in FIGS. 2 to 6, the knob 1 is attached to the upper end of a rotatable shaft 4, and a semicircular stopper portion 5 is also provided approximately in the middle of the shaft 4. , a plate 9 is attached to the lower end of the shaft 4 so as to rotate together with the shaft 4.

On the other hand, a pawl 7 that is rotatable about the shaft 6 is attached at a position where it comes into contact with the stopper portion 5.

The other end of the pawl 7 is biased in the direction of the shaft 4 by a spring 8 attached to one end, and normally it is in slidable contact with the outer periphery of the stopper part 5, but by turning the knob 1, the stopper When the portion 5 is rotated, the pawl 7 engages the stopper portion 5.
The rotation of the shaft 4 is stopped by engaging with the shaft 4.

An end opposite to the arm 12a of the connecting plate 10 is connected to the plate 9, and the arm 12a of the connecting plate 10
A spring 11 stretched between the a-side end and the player wall pulls the connecting plate 10 in the direction of the arm 12a, thereby applying rotational force to the shaft 4.

Similarly, the knob 2 is attached to the upper end of a rotatable shaft 21, and the shaft 21 is attached with a stopper portion 22 and a plate 26 that have the same functions as described above, and further includes a claw 23, a shaft 24, The spring 25 is also provided to perform the same function as described above.

Then, a connecting plate 27 is connected to the plate 26,
Similarly, the connecting plate 2γ is pulled in the direction of the arm 28a by the spring 28', and applies rotational force to the shaft 21.

The knob 3 is attached to a shaft 59, and a plate 60 is fixed to the lower end of the shaft 59.

A slide plate 61 is provided across the knobs 1, 2.3 so as to be able to reciprocate in the axial direction thereof.

A stopper portion 62 is provided on the plate 60, and a bent portion 6 formed by bending the end of the slide plate 61 is provided on the plate 60.
3.

The slide plate 61 is loosely held by holding pins 64 and 65, and is pulled in the direction from the knob 3 to the knob 1 by a spring 66.

In addition, bent portions 67 and 68 are provided near the knobs 1 and 2 of the slide plate, so that when the slide plate 61 moves from the knob 1 to the knob 3 direction, the tabs 7 and 2
The pawls 7 and 23 are rotated in a direction in which they are removed from the stopper portions 5 and 22 against the husband springs 8 and 25.

Further, a microswitch 69 is provided opposite the end of the slide plate 61 on the knob 3 side, and when this microswitch 69 is pressed, the switch is turned on and the electromagnet 37 is excited. There is.

Next, a mechanism for horizontally swinging the pickup arm 52 to perform repeated performances will be described.

As shown in FIG. 1, a small gear 45 is provided below the bearing 44 of the turntable.

A gear 41 is rotatably provided on a shaft 40 provided apart from the rotation center of the turntable, and a gear connecting plate 42 is rotatably provided on the gear 41 separated from the shaft 40 around the shaft 43. It is.

Further, the plate 38 facing the electromagnet 37 is connected to the shaft 39
It is rotatably attached to the surrounding plate, and both plates 38 and 42 are engaged so that the connecting plate 42 rotates in conjunction with the rotation of the plate 38.

Then, the upper pawl 46 of the small gear 45 and the pawl 42b of the gear connecting plate 42 (a part of the connecting plate 42 is 90°
When the pawl 46 and the pawl 42b of the gear connection plate 42 are engaged,
The carrier 41 is designed to rotate.

A cam groove 47 is provided on the lower surface of the gear 41.
It is slidably engaged with a cam groove joint pin 50' attached to one end of a main plate 49 rotatably attached to the record player body side around a shaft 48.

Due to this engagement, when the gear 41 rotates, the main plate 49 rotates around the shaft 48, and the main plate 49 rotates around the shaft 48.
The end portion of the pickup arm 9 is configured to reciprocate once in the horizontal direction per one rotation of the gear 41.

Further, a slide portion 50 is provided at the end of the main plate 49 near the center of rotation of the pickup arm, with its tip facing downward to form a slope, and this slope and the upper and lower Pu pins. The slide portion 5 is in sliding contact with the lower end of the main plate 51 as the main plate 49 reciprocates.
0, the pickup arm 52 is lifted up via the Pu moving pin 51 (see FIG. 5, etc.).

The upper part of the main plate is provided with plates 53, 54, which are pivoted on the shaft 48 and are each supported by a spring 55.
56 in the clockwise direction in FIG.

These plays) 53 and 54 will swing in the horizontal direction together with the main plate 48, and the tip of the plate 53 will be connected to the Pu movement provided on the arm 18b' of the plate t18a' fixed to the lower end of the Pu shaft 17. The pin 31 and the tip of the plate 54 are connected to the Pu stopper 20.
spacer 57 attached to the arm 20a of
In the figure, it can be contacted from behind the page.

Next, we will divide the operation of the repeat play device of the record player configured as described above into setting the first position of repeat play, setting the last position of repeat play, repeat play operation, and canceling the set position. explain.

First of all, to explain the basic operation when swinging the pickup arm 52 in the horizontal direction, in the first stage, the Pu moving pin 31 provided on the plate 18 a' at the lower end of the pivot shaft 11 is the arm 15a of both Pu stoppers 15.20.

20a are in contact with both sides, and these arms 1
It is sandwiched between 5a and 20a.

When the pickup arm 52 is horizontally swung in this state, the pivot shaft 17 of the pink up arm 52 rotates, rotating the plate N8a', and moving the Pu moving pin 31 to the plate 18, so that the long diameter of i' is Move horizontally on a circle with a radius.

At this time, there is a Pu stopper 2 on 18 a'.
Since the Pu stoppers 15 are further placed on the Pu stoppers 20, both the Pu stoppers 15 and 20 are placed as the plate 18a' rotates.
The arms 15a also rotate.

20a is moved in the horizontal direction together with the Pu moving pin 31.

Next, while the record is in a playable state, the pick amplifier is manually lowered to the starting position of the portion to be played repeatedly, that is, to the outermost circumference position on the record of the portion to be played repeatedly.

At this time, the arm 15a of the Pu stopper 15 moves to a position corresponding to the position of the pickup 5, and when the knob 1 is turned, the pawl 7 engages with the stopper portion 5 provided on the shaft 4 of the knob 1. Then, knob 1 is locked.

At this time, the plate 9 fixed to the lower end of the shaft 4 rotates in the same direction as the knob 1 and pulls the connecting plate 10, causing the arm 12a of the cam 12 attached to one end of the connecting plate 10 to move horizontally. The cam 12 is rotated by swinging.

When the cam 12 rotates, the pillars 14b and 14b' protruding from the upper surface of the cam 14, which has a slope 14a that comes into sliding contact with the slope 12b of the cam 12, moves into the notch 1 of the annular plate 16.
6a, 16a' to restrict the rotational movement of the cam 14, the slopes 12b, 12b'.

14a, 14a'.

Then, the tips of the pillars 14b and 14b' eventually come into contact with the lower surface of the flange portion 15b of the Pu stopper 15, and lift the Pu stopper 15 away from the upper surface of the Pu stopper 20 in the -L direction.

And finally, the flange part 1 of the Pu stopper 15
Since the upper surface of the Pu stopper 5b is pressed against the lower surface of the flange portion 18b of the base shaft 18, the flange portion 15b of the Pu stopper 15 is pressed against the pillar 14b.

14b' and the flange part 18 of the base shaft 18
The pick-up arm 52 is held between the lower surface of the pick-up arm 52 and fixed so that it cannot rotate, and as a result, despite the horizontal movement of the pick-up arm 52, the position of the arm 15a is fixed at the position corresponding to the initial position of the repeated performance. The Rukoto.

Note that this fixed state is maintained by the spring 19 so that the cam 12 does not loosen.

With the above steps, the setting of the first position of the repeated performance is completed.

Next, we will explain how to set the final position of the repeated performance section, that is, the innermost circumference position of the repeated performance section on the record. Bring it to the final position.

At this time, the arm 20a of the Pu stopper 20 also moves to a position corresponding to its final position.

Then, turn knob 2 to perform the same operation as described above.

That is, by pulling the connecting plate 21, the cam 2
The cam 28 is rotated by horizontally swinging the arm 28a of the cam 28, and the cam 29, whose rotational movement is restricted in the same manner as described above, is moved to the slopes 28b, 28b'.

29a, 29a', and the tips of the pillars 29b, 29b' are brought into contact with the lower surface of the flange part 20b of the Pu stopper 20, thereby lifting the Pu stopper from above the plates 18a,', and the flange part 2
The upper surface of the arm 20a is pressed and fixed against the lower surface of the Pu stopper 15, and finally the arm 20a is fixed at a position corresponding to the last position of the repeated performance.

The fixed state is maintained by the spring 30' so that the cam 28 does not loosen.

Note that when the Pu stopper 20 is lifted upward and fixed, the electrical contact 35 attached to the arm 20a comes into contact with the electrical contact 36 of the holder 13, and the electrical contacts 34, 35, and 36 are connected to each other. This results in electrical continuity.

With the above steps, the setting of the final position of the repeated performance is completed.

Next, the repetitive performance operation will be explained.

It is assumed that the first and last positions of the repeated performance have already been set.

When the pickup advances toward the inner circumference along the record sound groove and reaches the innermost circumference setting position for repeated performance, the Pu moving pin 31 is stopped by the arm 20a of the Pu stopper 20, and the Pu moving pin 31 is stopped by the arm 20a of the Pu stopper 20. electrical contact 32 and Pu
The electrical contact 34 of the stopper 20 comes into contact with the electrical contact 3
2.34, 35.36 become conductive, which causes electrical contact 3
The electromagnet 37 connected to the other end of the lead wire connected to 2.36 is excited.

When the electromagnet 37 is excited, the plate 38 is attracted and rotated around the shaft 39, and the connecting plate 42, which engages with the plate 38, is further rotated around the shaft 43.

At this time, the pawl 46 of the small gear 45 provided below the bearing of the turntable and the pawl 42b of the connection plate 42 are connected, and the gear 41 is rotated.

As the gear 41 rotates, the cam groove connecting pin 50' slides within the cam groove 47, and as a result, the main plate 49 rotates around the shaft 48, and the P of the main plate 49 rotates.
The tip of the u-pivot shaft 17 side is made to reciprocate once in the horizontal direction per one rotation of the gear 41.

At the beginning of this reciprocating movement, the main plate 49
Since the sliding portion 50 has its slope in sliding contact with the Pu upper and lower pins 51, it functions to push up the upper and lower pins 51, thereby lifting the pickup arm 5-2 upward.

Furthermore, when the tip of the main plate 49 moves horizontally in the outward direction, the plate 53.5 attached to the main plate 49 and moving horizontally together with the main plate 49
4, the plate 53 comes into contact with the Pu moving pin 31, and the plate 54 comes into contact with the arm 20a of the Pu stopper 20, respectively.

In this case, the arm 20a is fixed in position and cannot be swung, so even if the main plate 49 moves further in the forward direction, the plate 54 will be able to maintain the position of the arm 20a by stretching its spring 56. is locked.

On the other hand, the plate 53 is moved in the forward direction by pushing the Pu moving pin 31, and therefore the plate 18a
', the pivot shaft 17 is rotated to lift the pickup arm 52 and horizontally move the record from the innermost circumferential position to the outermost circumferential position for repeated performance.

Note that at this time, since the electrical contacts 32 and 36 are separated, the excitation of the electromagnet 37 is released.

Eventually, the Pu moving pin 31 is locked to the arm 15a of the Pu stopper 15 whose position is fixed, and the plate 5
3 is also locked at the position of the arm 15a by the extension of its spring 55.

Therefore, the horizontal movement of the pickup arm 52 is stopped at the outermost position of the repeated performance.

Next, when the main plate 49 moves horizontally from the forward direction to the return direction, the plate 53 first leaves the Pu moving pin 31 at the locking position of the arm 15a (therefore, the position of the pickup arm 52 also does not move). ) moves away from the Pu moving pin 31 in the return direction, and then moves away from the plate 5.
4 moves away from the arm 20a.

Just before the main plate 49 finishes returning in the return direction, the Pu upper and lower pins 51 are pushed by the springs 58 and lowered along the slope of the slide portion 50.

As a result, the pickup arm 52 also descends and the pickup comes into contact with the record, and the player performs the performance again from the starting position of the repeated performance.

Finally, the gear 41 completes one rotation, and the side surface 42a of the gear connection plate 42 contacts the small gear 45, returns to its original position, and then enters the gear notch 46'.
The gear stops.

Next, the operation of canceling the set position will be explained.

When you want to cancel repeat performance, turn knob 3.

This causes the shaft 59 and the plate 60 at its lower end to rotate in the same direction as the knob 3.

The stopper portion 62 of the plate 60 and the bent portion 63 of the slide plate 61 engage with each other, and the slide plate 61 moves from the knob 1 to the knob 3 direction.

As the slide plate 61 moves, the upward bending portion 67
68 engages with the pawls 7, 23, the pawls 7, 23 rotate, and the pawls 7, 23 disengage from the stopper portions 5, 22.
Knobs 1 and 2 return to their original positions.

Cam 14 is also returned to its original position by springs 70.71 and cam 29 is returned to its original position by springs 72.73.

Further, when the slide plate 61 hits the microswitch 69, the electromagnet 37 is excited.

As a result, the small gear 45 and the gear 41 are connected by the gear connecting plate 42, the gear 41 rotates, the main plate 49 operates, and the Pu upper and lower pins 51 are pushed up.

Subsequently, the plates 53 and 54 are used to connect the Pu moving pin 31 and the P
The U stopper 20 and the Pu stopper 15 are rotated and returned to their respective starting positions.

While rotating, the gear 41 returns the gear connection plate 42 to its original position and lowers the Pu upper and lower pins 51.

At this time, the pickup is on the rest and the gear 41 enters the notch 46.

This causes the pickup to drop onto the rest and turn off the power switch due to the pickup's own weight.

Repeated performance is canceled by the above operation.

Next, the case where a shock absorber is provided at the lower end of the Pu pivot shaft will be explained with reference to FIGS. 9 and 10.

The Pu moving plate 101 is fixedly attached to the lower end of the Pu pivot.

At the other end of the Pu pivot shaft 17 of the Pu moving plate 101, there is a bent part 102 in which a part of the plate is bent upward by 90 degrees, and an arm 103 bent in a U-shape below the middle of the Pu moving plate. A hemispherical protrusion 104 is provided in the center of the arm 103 in an upward direction.

The shaft portion 105 to which this Pu moving plate is fixedly attached
A Pu auxiliary moving pin 31 is fixedly attached to a plate extending radially outward from the upper end of a shaft 106 that is rotatably attached around the axis.

The Pu auxiliary plate 107 is inserted into the U-shaped bent part of the Pu moving plate 101 and is inserted into the protrusion 10 of the arm 103.
4 and maintains that relationship by low friction with the projection 104.

The operation of the above-mentioned shock absorber is as follows.

When the innermost position of the record is set,
Contact point 32 contacts contact point 34, magnet 37 is energized, and gear 41. The small gear 45 is connected and begins to rotate, pushing up and down the upper and lower pins 51 by the slide portion 50 of the main slide 49, and then raising the pickup 52. The pickup 52 also moves the record even in a short period of time until the tip of the pickup stylus leaves the record. Proceeds inward due to grooves in the board.

At this time, when the pickup 52 encounters a groove with a large pitch such as the last groove of a record, the pickup 52 is stopped by the contacts 34 and 32, so the pickup 52
load is applied to the needle tip.

At this time, even though the contact 32 of the Pu auxiliary moving pin 31 is in contact with the contact 34, the Pu auxiliary plate 107 is held by the small friction of the protrusion 104, so the Pu plate 101 is aligned with the groove of the record and inside. The load on the needle tip of the pickup 52 is eliminated.

Also, the Pu moving plate 1 advanced by the groove of the record.
01, the pickup 52 is raised and the plate 53 is at P.
When the U moving plate contacts the bent portion 102, rotates the pickup 52, and returns to the set outermost position, the Pu moving plate is returned by the distance traveled.

This player can be used as a general manual player when the knobs 1 and 2 are not operated.

As explained above, according to the present invention, the first plate that returns the Pu moving pin to the outermost position of the record when the repeat performance mechanism is released is retracted from the rotation area of the Pu moving pin while the record is being played. In addition, the two Pu stoppers are loosely fitted to the pickup shaft, and are made to slide and rotate against the Pu plate fixed to the pickup shaft. Since no force is applied in the direction of rotation of the arm, and the playback needle of the pickup arm can follow the sound groove without difficulty, the record playback characteristics are not impaired during performance.

[Brief explanation of the drawing]

FIG. 1 is an overall plan view of a repeat performance device for a record player according to the present invention (however, the top plate of the record player is removed and the internal structure is shown), and FIG. 2 is a knob of the device shown in FIG. 1. FIG. 3 is a side view of FIG. 2, FIG. 4 is a front view of FIG. 2, FIG. 5 is a sectional view of the center of rotation of the pickup shown in FIG. 1, and FIG. 6 is a detailed plan view of the portion shown in FIG. is a cross-sectional view mainly showing the electrical contacts in Fig. 5, and Fig. 7 is a cross-sectional view mainly showing the electrical contacts in Fig. 1.
Fig. 8 is a side view along the center of Fig. 1; Fig. 9 is a partially sectional front view when a shock absorber is attached to the lower end of the Pu pivot shaft; 1st
0 is a bottom view of FIG. 9, and FIG. 11 is an exploded view of the position setting mechanism. 1... Knob for setting the outermost circumference position of the repeat performance section, 2... Knob for setting the innermost circumference, 3...
・Knob for canceling the repeat play setting, 5, 22...
... Stopper part, 7, 23 ... Pawl, 10.2
7... Connection plate, 13... Holder, 15, 20... Pu stopper, 17-Pu pivot shaft, 18... Plate (Pu plate), 31...Pu moving pin, 34, 35,
36... Electric contact, 37... Electromagnet,
41...Gear, 45...Small gear, 49
...Main plate, 50...Slide part, 51...Pu upper and lower pins, 52...
・Pickup arm.

Claims (1)

[Scope of Claims] 1. The first knob is rotatably fitted around the pickup shaft and movably movable in the axial direction along the pickup shaft; When not operated, the pickup shaft is rotated, and when the first knob is operated, it is moved in the axial direction of the pickup shaft in conjunction with the first knob, and when the first knob is operated, it is moved in the axial direction of the pickup shaft. The first P that is pressed against a stationary object by the force of
an outermost circumferential position setting mechanism for setting the outermost circumferential position of a portion of the record that is desired to be played repeatedly; a second knob; The pickup shaft is loosely fitted so as to be movable in the axial direction along the shaft, and is rotated based on the rotation of the pickup shaft when the second knob is not operated, and when the second knob is operated. a second Pu stopper that is moved in the axial direction of the pickup shaft in conjunction with the knob, and is pressed against the stationary object via the first Pu stopper by the force in the axial direction and stops rotating; an innermost circumference position setting mechanism for setting the innermost circumference position of a portion of the record that is desired to be played repeatedly; a Pu plate fixed to the pickup shaft and rotating integrally with the pickup shaft; Pu
a Pu moving pin fixed to the plate and reciprocating in a section limited by the first Pu stopper and the second Pu stopper;
an electric contact that is provided on the U stopper and turns on and off as the Pu moving pin approaches and separates from the second Pu stopper when rotation of the second Pu stopper is stopped by being pressed against the stationary object; an electromagnet actuated by the electric contact; a main plate that swings in conjunction with the rotation of the rotating shaft of the record due to the operation of the electromagnet; It is composed of a first plate that returns the pin to the playing start position, and a slide part that is made of a slope provided on the main plate and that raises and lowers the pick arm, and the slide part is configured to move the pick arm up and down repeatedly between the outermost circumferential position and the innermost circumferential position. a third knob; a slide plate that disengages the stoppers of the first knob and the second knob and restores them to their original positions in conjunction with the third knob; a microswitch that turns on and off in conjunction with the slide plate to excite the electromagnet; and a microswitch that is swingably mounted on the non-plate and cooperates with the first plate when the slide plate is turned on. and a second plate that restores the Pu moving pin, the first Pu stopper, and the second Pu stopper to the state before they were set to the innermost circumferential position and the outermost circumferential position, a release mechanism for releasing the outermost circumference position setting mechanism and the innermost circumference position setting mechanism, the second Pu stopper is brought into sliding contact with the Pu plate, and the first Pu stopper is brought into sliding contact with the Pu plate; Second Pu
By slidingly contacting the stopper, the first Pu stopper and the second Pu stopper are rotated together with the pickup shaft, and during record playing, the first plate is moved from the Pu moving pin. A repeat performance device for a record player, characterized in that it is retracted.