JPS593401Y2 - Interlocking adjustment device for turntable speed and pickup arm lowering position in automatic record player or record changer - Google Patents

Description

[Detailed description of the invention] This invention adjusts the lowering position of the pickup arm to the edge of the record placed on the turntable and the speed of the turntable in conjunction with each other to adjust the lowering position of the pickup arm to the edge of the record placed on the turntable. The shift lever is controlled by engagement with a lever step of a shift lever having a
This invention relates to an interlocking adjustment device for adjusting the turntable speed and the lowering position of a pickup arm in an automatic record player or record changer, in which the lever step can be rotated around a vertical spindle, and the lever step is selected by a movable sensitive tweeter. .

Such a device is described in German Patent Specification No. 1 134 218
listed in the number.

In this case, a two-arm shift lever with a step is rotatable around the spindle, and this shift lever is positioned below the deck plate of the record player.

When a record is lowered or placed on the turntable, the record allows a movable sensitive feeler constituted by a lever to be rotated above the turntable, and this lever is provided with a cam disc, and the cam disc is disposed below the turntable. .

The position of this camte disk determines the lever step, and the shift lever can be rotated to this lever step during adjustment.

Therefore, the position at which the pickup arm should be lowered onto the record is determined by this shift lever.

In the known device, the shift lever is provided with a path that can be pivoted around a spindle, and by means of this path a speed selection lever is influenced.

This speed selection lever cooperates with a speed selection cam, on which the roller of the speed selection lever can engage.

At this time, the associated turntable speed is adjusted via the speed selection lever.

In this known device, speed selection via a large number of cooperating control elements and detection of the record diameter are a problem, as is the smooth cooperation of all parts with each other.

That is, the detection of conventional devices is mechanically complex and requires sufficient lubrication to maintain low frictional forces.

Moreover, the lever as a movable feeler assumes a position above the record, which position poses an obstacle when removing the record.

The purpose of this invention is to provide a device for interlocking the turntable speed and the lowering position of the pickup arm in an automatic record player or record changer, which allows speed selection to be performed effectively using the shift lever itself and eliminates interference factors when taking out records. is to obtain.

To simplify the explanation, two speeds and two record diameters will be described among the three speeds and record diameters.

To this end, the device of the present invention includes a movable sensitive feeler placed on the side of the turntable which may or may not abut the edge of a record having a diameter beyond the edge of the turntable during the record diameter sensing cycle. A movable sensitive feeler is vertically movable to determine the record diameter, and the movement of the movable sensitive feeler is controlled by a control disc via a transmission lever rotatable about a horizontal axis to complete the record diameter sensing cycle. A rider rotatable around a horizontal axis together with the transmission lever has a diameter of 30 crn.
The lever step is selected by engaging the shift lever at the rotational position of the rider based on the amount of movement of the movable feeler, which differs depending on whether the record is a record or not. Now, when the single arm dead center lever → D free end is engaged with the shift lever by the dead center spring, and the shift lever is rotated to transfer the record step with a diameter of 17 cm to the path of the pickup arm, This shift lever is characterized in that the free end of the dead center lever is swing-pressed to a switch for changing the speed beyond the dead center.

In this case, the shift lever moves the switching lever, which ensures reliable switching when the switching lever swings beyond the dead center.

In still another embodiment of the present invention, one arm of a shift lever having two arms is provided with a lever step for stopping the pickup arm, this lever step is arranged on a horizontal plane, and the other lever arm is provided with a lever step for stopping the pickup arm. is provided with a vertically adjacent lever step, which can be engaged with a transmission lever, and which can also be rotated around a horizontal spindle, with a rotation determining the lever step. The position is determined during the sensing and adjustment operation by a sensitive pin as a sensitive feeler, which can be moved vertically upwards under spring pressure, and this sensitive pin can move around the protruding edge of the record on the outside of the turntable. Crimp or
Or to allow a record whose edges do not protrude so that it can move freely upwards when placed on a turntable.

A pin that can move vertically is loaded only in the axial direction and requires almost no driving force.

The second lever step for presetting the record diameter, which is controlled solely by the sensitive pin via the tilting transmission lever, is reliably struck at the shortest travel distance.

A further embodiment of the invention provides for a rider to be pivotably arranged on a transmission lever, and for the actuating arm of this rider to engage a lever step for presetting the record diameter, the record diameter being adjusted by a sensitive pin. The selected lever step is maintained in contact with the selected lever step until the shift lever returns to the standby position after the adjustment operation is completed.

This rider allows you to obtain a time delay if you cancel the selected position.

That is, the disengagement of the lever step, which is pre-adjusted for the selected record diameter, is independent of whether the transmission lever is tilted back during that time.

In yet another embodiment of the invention, the transmission lever is moved over the control disk with the bent lug of the transmission lever tilted rearward, thereby depressing the sensitive pin, and the lug is moved at predetermined time intervals. Only engages the recess of the control disc,
This allows the transmission lever to release the sensing pin to be sensitive to the diameter of the record and to transmit this sensing result to the shift lever.

In this manner, the speed and lowering position of the pick-up arm can be set or preselected on the basis of the position of the control disk during special time intervals during replacement or start-up operations.

It is clear that a control slide can be used instead of this control disc.

The invention will be explained with reference to the drawings.

A rotatable turntable 3 is placed on a deck plate 1 of a record player.

A sensitive pin 7 as a sensitive tweeter can be passed through the opening 5 of the deck plate, and a compressive force is applied to this pin in advance by a spring 9 so that it can move upward.

A spindle 11 supporting a transmission lever 13 is supported on a deck plate 1.

Place the rider 15 on the lever 13 and place it on the spindle 1.
Rotate around 1 so that it hangs.

The transmission lever 13 is provided with a lug 17, which is bent downward (the end of the lug is shown on the right in the drawing) and placed on the surface of the control disk 21.

The transmission lever 13 has a lever arm 11 (located on the right side of the spindle 11) and a lever arm 13'' (located on the right side of the spindle 11).
) located to the left of 1.

The lever arm 13'' is made heavier than the lever arm 13' so that it automatically tilts to the left when no other load is applied.

A three-armed shift lever 25 is pivotable about a vertically pivoted spindle 23.

One lever arm 2 located on the left side of the spindle 23
At 5", lever step 27 is attached to this shift lever.
a, 27 b are provided and these steps are arranged on a vertical plane.

However, the lever arm 2 located on the right side of the spindle 23
5', lever steps 29a, 29b (see FIG. 4) are arranged.

The lever steps 27a, 27b engage the arms 31 of the rider or holding lever 15 and control the travel of the cross piece 33 by the lever steps 29a, 29b.

This cross piece is frictionally connected to the pickup arm during the record changing cycle.

The cross piece and pick-up arm (not shown) are pivotable about the spindle 35.

A vertical pin 37 is provided on the intersection piece 33, and this vertical pin 37
is pulled toward the shift lever 25 by the tension of the spring 39.

The shift lever 25 itself is preloaded with tension in the clockwise direction by a spring 41.

When an exchange operation or an automatic play operation is to be initiated, a known control task 21 is first started.

A recess 43 is formed in the control disk 21, and the recess 43
The lug 17 of the transmission lever 13 can be engaged with the lug 17 of the transmission lever 13.

When the ear 17 engages the recess 43, the spring 9 presses the lever arm 13'' upwardly via the protrusion 45 of the sensitive pin 7 as a sensitive tweeter.

The upward movement of the sensitive pin 7 is based on the record placed on the turntable 3.

In FIG. 2, it is assumed that a record 47' having a diameter of 17 cnn is placed on the turntable 3.

In this case, the sensitive pin 7 moves upwardly over the rim 49 of the turntable and the edge 51 of the record.

At this time, the transmission lever arm 13'' and the rider 15 are near the upper lever step 27a.

At this time, the shift lever 25 is rotated clockwise, and the pin 37 of the cross piece 33 can be engaged with the step 29a.

The quantity control disk 21, which carries out the control or exchange operation, rotates further.

At the end of the recess 43 the lug 17 of the transmission lever 13 is pushed out of the recess 43 and rests again on the upper surface 53 of the control disc 21 .

At this time, the transmission lever arm 13'' is pressed downward, and the transmission lever arm 13'' connects the lug 45 and the pin 7.
and move downward.

The sensitive pin 7 then assumes its initial position.

At this point, the pickup arm has not been rotated to the required lowered position.

Furthermore, the shift lever 25 is connected to the transmission lever 13 and the rider 1.
It remains in the position regulated by 5.

That is, the rider 15 uses the arm 31 to shift the shift lever.
This is to hold the shift lever 25 by crimping the shift lever 25.

At this time, the rider remains in the position visible in FIG. 3, and the transmission lever 13 has already returned to its tilted position.

After the pick-up arm has descended to the edge of the 17 cm record 47' based on the position of the pin 7 and the intersection piece 33, the shift lever 25 is arranged to rotate counterclockwise by the control tooth; The clockwise rotation disengages the rider 15 from the step 27a and lowers it onto the transmission lever 13.

Also, at this time there is no frictional connection between the pick-up arm and the cross piece 33, and all components of the device are configured to return to the standby position by means of the control disc.

The control position changes when placing the 30 cm record 47'' on the turntable prior to other play operations.

When starting a control operation, the control disk 21 is first started.

The positions of the individual parts correspond to those in FIG.

At a given moment, the lug 17 of the transmission lever 13 is in the depression 4.
Multiply by 3.

At this time, the transmission lever 13 and the rider 15 tilt upward.

This is because the spring presses the sensitive pin 7 and the protrusion 45 upward.

The upward movement of the sensitive pin 7 is limited by the edge 53 of the record 41'', onto which the sensitive pin is pressed from below.

In the state shown in FIG. 5, the transmission lever 13 is tilted slightly more than in the state shown in FIG.
1 is located in front of the lever step 27b.

At this time, the pin 37 of the shift lever 25 is moved to the step 29.
It can be rotated by a small angle clockwise to engage b.

The control disc 21 rotates further and the ear is raised again and rests on the upper surface 53.

At this time, the transmission lever 13 presses the sensitive pin 7 downward and the rider 15 remains at the position shown in FIG.

After the pickup arm has landed on the edge of the record 47'' and just before the end of the movement of the control disk, the shift lever 25 is caused to move a distance in the counterclockwise direction by the control disk, and this counterclockwise rotation moves the rider. 15 is lowered back onto the transmission lever 13.

At this time, the standby position of FIG. 1 is again obtained.

A third control operation of the pickup arm is shown in FIG.

FIG. 7 shows the pickup arm moved to the rest position.

When record play is completed, the control disk shall automatically begin rotating by means of a switching device (not shown), which is well known in conventional record changers.

Rotation of the control disk causes the prongs 17 to run on the control disk.

When the ear 17 reaches the position of the recess 43, the ear 17 cannot engage the recess.

This is because the cross piece 55, which is arranged to be moved by the control disk, engages the holding arm 54 of the transmission lever 13 and holds the transmission lever 13.

At this time, the arm 31 of the rider 15 is moved to the shift lever 25.
The lever is engaged with the third lever step 27C (see FIG. 7).

In this position the pin 37 of the cross piece 33 abuts the non-horizontal lever step 29C.

The pick-up arm, which is now controlled via the cross piece 33, rises from the record 47'' and is again frictionally connected to the cross piece 33, so that it crosses back to its rest position based on the current position of the cross piece 33. It can rotate together with the piece 33.

A very simple speed selection is provided in connection with the detection of record dimensions and the adjustment of the pick-up arm relative to the associated record edge.

For this purpose, the length of the lever arm 25'' as the third arm of the shift lever is determined so that it can cooperate with the dead center lever 57.

This dead center lever 57 is made rotatable at a pivot point 59.

A tension spring 61 attached to a mounting frame (not shown) at a point acts on the dead center lever 57 at a point 63.

In the position according to FIG.
The lever arm 25'' is placed on the shift lever 25.
Multiply with.

In this working position the pin 37 of the cross piece 33 engages the lever step 29b and a 30 cm record 47'' rests on the turntable.

The switch 67 adjacent to the dead center lever 57 is in the open state in the state shown in FIG.

The drive motor is configured to be driven at a speed of 33 revolutions/minute.

During another exchange operation, when a record 47', that is, a record with a diameter of 17 cm (see FIG. 4) is placed on the turntable, the lever arm 25'' of the shift lever 25 is further rotated clockwise by the sensitive pin 7.

At this time, the dead center lever 57 is rotated counterclockwise via the pin 65, swings beyond the dead center, and comes into contact with the switching contact 69 of the switch 67.

As a result, switch 61 is switched to the closed state, and motor 4
The speed changes to 5 revolutions/minute.

The dead center lever 57 is actuated and pushed clockwise past the dead center each time the control disc 21 is started, so that the lever arm 25 of the shift lever 25 is pinned at the beginning of a new control operation. 65 is multiplied.

[Brief explanation of drawings]

FIG. 1 is a side view showing the standby position while a record is being played or the state before a record is placed on the automatic record player or record changer according to the present invention, in which the device for interlocking the turntable speed and the lowering position of the pickup arm is adjusted. , FIG. 2 is a side view showing the sensitivity and holding period for adjusting the shift lever of the device of the present invention;
Figure 3 is a side view showing the state in which the shift lever is held when the sensitive pin has returned to the standby position, Figure 4 is a plan view of the device of the present invention in the operating position according to Figure 2, and Figure 5 shows a case where the end edge is turned. A plan view showing a state in which a record protruding from the edge of the table is detected, FIG. 6 is a plan view of the device of the present invention in the operating position shown in FIG. 5, and FIG. 7 is a plan view of the device of the present invention showing the position before stopping. It is a diagram. 1... deck plate, 3... turntable, 5
...Deck plate opening, 1...Pin (movable sensitive feeler), 9.39, 41.61...Spring, 11...
・Spindle, 13...Transmission lever, 13', 13
”...Transmission lever arm, 15...Rider, 17.
... protrusion, 21 ... control disk, 23 ... vertical pivot spindle, 25 ... shift lever 125', 2
5", 25"'...Shift lever arm, 27a
, 27 b, 27 C, 29a. 29b, 29C...Lever step arm, 33.3
5... Intersection piece, 35... Spindle, 37...
Intersection piece vertical pin, 43... recess, 45... pin protrusion, 47'... 17cm record, 47''...3
0cm record, 49...rim, 51...edge, 5
3... Control disk upper surface, 54... Transmission lever holding arm, 57... Dead center 4 lever, 59... Dead center lever pivot point, 61... Tension spring, 65... Stop Pin, 67...Drive motor switch, 69...Switching contact.

Claims (1)

[Scope of utility model registration request] The position at which the pickup arm is lowered to the edge of the record placed on the turntable for playing is adjusted in conjunction with the speed of the turntable, and the lowering position of the pickup arm is engaged with a lever step of a shift lever having a plurality of arms. In the device, the shift lever is rotatable around a vertical spindle, and the lever step is selected by a movable sensitive tweeter, the movable sensitive tweeter is arranged on the side of the turntable, and the shift lever is rotatable around a vertical spindle. a movable sensitive tweeter is vertically movable to determine the record diameter by abutting or not abutting an edge of a record having a diameter beyond the edge of the turntable during a diameter sensing cycle; A control disk controls a rider via a transmission lever rotatable around a horizontal axis, and a rider rotatable around the horizontal axis together with the transmission lever during the record diameter sensing cycle, depending on whether the record has a diameter of 30 cm or not. The lever step is selected by engaging the shift lever at the rotational position of the rider based on the amount of movement of the movable sensitive tweeter, and among the two selected speeds, in the setting state for a record with a diameter of 30 cm, the dead center spring 61 The free end of the single arm dead center lever 57 is engaged with the shift lever 25, and the lever step 02 for a record with a diameter of 17 cm is set.
When the shift lever 25 rotates to transfer the pickup arm 9a to the path of the pickup arm, the shift lever swings and presses the free end of the dead center lever 57 to the switch 67 for changing the speed beyond the dead center. A device for interlocking adjustment of turntable speed and lowering position of a pickup arm in an automatic record player or record changer, characterized in that: