KR870002046Y1 - Switch machine of record player - Google Patents

Abstract

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Description

Record player switch mechanism

1 to 4 are plan views showing one embodiment of the present invention,

Figure 1 shows the state when not using the record player (power off),

Figure 2 is a state in which the ton arm is placed on the outer periphery of the record in order to play the record,

3 is a state where the tow arm is about to return to its original position after the end of recording.

4 is a diagram showing an operating state of the associated mechanism during the return operation of the towing arm,

5 and 6 are diagrams showing switch mechanisms of conventional record players, respectively,

5 is a side view.

6 is a plan view.

* Explanation of symbols for main parts of the drawings

1: Toun Arm 2, 3: Pickup Player

4: Return lever: Stair car

8 switch: knob

The present invention relates to a switch mechanism of a record player, and more particularly, to a switch mechanism when a tow arm is stored at the rear of the record player.

In the conventional record player, when the tow arm is taken from the arm stop to the outer circumference of the record (usually 30cm or 17cm), the tow arm is lifted from the arm stop immediately so that the power is switched on. A certain mechanism is installed in the pick-up plate.

5 and 6 show one example thereof.

In FIG. 5, the towing arm 21 is placed in contact with the switch lever 22 with the arm stop 26.

The lower end of the switch lever 22 is in contact with the knob 23 of the switch 24. The weight of the towing arm 21 causes the switch 24 to be turned off and the turntable 25 is stopped. have. However, when the tow arm 21 is pulled out from the arm stop 26 in the direction of the arrow 21a, the switch lever 22 is pushed up by the spring 27 to fall off from the knob 23 of the switch and the power switch 24 ) Is turned on and the turntable 25 begins to rotate through the motor.

In other words, the ton arm 21 is a mechanism in which power is turned on by being separated from the arm stop 26.

Next, in Fig. 6, the pick-up plate 28 is fixed to the towing arm 21, its tip is in a state of pushing the knob 23 of the switch 24, and the switch 24 is off.

However, when the tow arm 21 is removed from the arm stop 26, the tip of the pick-up plate 28 falls from the knob 23 of the switch 24 according to the movement of the ton arm 21, and the power switch 24 is turned on. The turntable 25 starts to rotate. In other words, this mechanism is also a mechanism in which the power is turned on because the towing arm is separated from the arm stop.

As described above, in the conventional record player, when the tow arm is separated from the arm stop, the power is turned on and the turntable starts to rotate.

However, for the purpose of narrowing the width of the player and obtaining a compact configuration, a structure for storing the tow arm at the rear of the record player is required.

In such a player, if the ton arm rotates the turntable away from the arm stop, if the needle is accidentally raised on the record surface, the tip of the turntable will reverse the rotation of the record because of the right turn of the turntable. It may cause damage.

In order to avoid such an irrationality, the present invention proposes a switch mechanism that does not enter the power until the tow arm crosses the center of the turntable.

Thus, as a means for solving the above problems, the present invention includes a linear pick-up plate fixed to the support rotation part of the tow arm, and has a switch mechanism that switches on or off when the tow arm reaches a predetermined position. It is characterized by one.

EXAMPLE

Next, an embodiment of the present invention will be described.

1 to 4 are plan views showing one embodiment of the present invention, and FIG. 1 is a diagram showing a state when the record player is not used (power off), and FIG. 2 is a tonal arm trying to play the record. 3 shows the state where the tow arm is about to return to its original position after the record is finished, and FIG. 4 shows the operating state of the related mechanism during the return operation of the ton arm. Will be displayed respectively.

In FIG. 1, the tow arm 1 (1b, its axis of rotation) is on an arm stop (not shown) and is formed by the granular portion 3a on the left side of the linear pickup plate 3 of the power switch 8. The knob 8a is pushed in and the power is off. The switch 8 is fixed to the switch base 9, and the switch base 9 is rotatably supported by the shaft 11.

In addition, pin 10 is caulked in the switch base 9 and pin 10 is in contact with the side of the return lever 4. In addition, on the opposite side of the return lever 4, an up-down plate 12 for raising and lowering the elevation side (not shown) is pivotally supported by the shaft 14, and the pin 13 is caulked on the up-down plate 12. Like the pin 10,) is in contact with the side of the return lever 4, so that both of the up-down plate 12 of the switch base 9 by the spring 18 is pressed on both sides of the return lever (4). Is placed.

The return lever 4 has a step difference 4a formed at a portion where the pins 10 and 13 are pressed, and the switch base 9 is formed by the reciprocating operation of the return lever 4 by the rotation of the drive cam 5. ) And the up-down plate 12 are configured such that the step 4a of the return lever 4 is opened and closed at the same time.

Here, the cam 5 has a gear 5a rotating in engagement with the turntable shaft gear 7 and moves the return lever 4 in the direction of the arrows 4c and 4d through the pin 4b provided on the return lever 4. Reciprocate. The up-down plate 12 is inserted into the up-down plate 12 as shown in the drawing, and the up-down plate 12 is rotated by pushing in the direction of the arrow 15a. Not)) so that the elevation shaft is up and down by sliding the seam 15 is installed for manual use.

In addition, the drive cam 5 described above is provided to operate the towing arm 1 and the return lever 4 for the predetermined opening and closing operation of the switch base 9 and the up-down plate 12. By attaching the clutch plate 6 thereon, the lever 17 protrudes by the operation of the magnet (solenoid) 16 and pushes the clutch plate 6 so that the click 6b on the opposite side is a protrusion of the turntable shaft gear 7. Engages with 7a and thereby rotates the drive cam 5 to enable the repetitive movement of the return lever 4 (see FIG. 3).

Next, the operation of the present invention will be described.

In FIG. 1, the linear pickup plate 3 and the pickup plate 2 are fixed to the tow arm 1 and are in a relationship following the operation of the tow arm 1.

In the position of this figure, the knob 8a of the switch 8 is pressed by the granular part 3a on the left side of the linear pickup plate 3, and the power supply is off.

The tow arm 1 was moved in the direction of the arrow 1a with his hand, and when the tow arm 1 came to the position shown in Fig. 3, the tow arm 1 was sliding in contact with the knob 8a of the switch 8. The contact portion of the pick-up plate 3 is separated from the knob 8a and the knob 8a of the squelch 8 automatically pops out so that the switch 8 is turned on.

Therefore, the knob of the switch 8 is located on the side of the linear pickup plate 3 until the tow arm 1 moves forward from the arm stop and passes through the turntable shaft gear 7 to reach the end of the groove of the record. 8a is pressed and the switch 8 remains off.

As a result, even if the needle is placed on the record surface by mistake, it is possible to prevent the needle tip and the record surface from being damaged.

In addition, the tow arm 1 is taken to the position indicated in the body 2 diagram and the record is played.

The linear pick-up plate 3 is then completely away from the switch 8 and the switch 8 continues to be on, but the switch base 9 and pin 10 are at rest.

That is because the positional relationship with the return lever 4 does not change. The tow arm 1 gradually moves toward the inner circumference of the record while tracking the record groove and soon comes to the position indicated in the body 3 degrees. At this time, the right side of the linear pickup plate 3 tries to make a tight contact with the knob 8a of the switch 8, but the knob 8a is not pushed yet, and the turntable continues to rotate.

As shown in Figure 4, the ton arm 1 enters the empty groove of the record, but at this moment, the magnet (solenoid) 16 is moved by the operation of the pickup plate 2 (by a predetermined electric circuit). The lever 17 connected to the magnet 16 by momentarily generating 12V moves momentarily in the direction of the arrow 17a, and as shown in Fig. 3, the lever 17 is connected to one end of the plug plate 6; Push (6a).

The clutch plate 6 is then rotated so that its other end 6b is engaged with the click 7a of the turntable shaft gear 7 and the drive cam 5 is rotated in the direction of the arrow 5a.

The drive cam 5 is engraved with a cam groove 5b at its lower side, and the pin 4b of the return lever 4 is fitted in the groove, and the pin 4b is guided by the rotation of the cam 5, As shown in Fig. 4, the return lever 4 starts to move in the direction of the arrow 4c.

In addition, when the towing arm 1 enters into the hollow groove of the record, the return lever 4 moves together with the rotation of the drive cam 5 so that the pin of the switch base 9 which is in contact with the side of the return lever 4 ( 10) and the pin 13 of the up-down plate 12 are opened by pushing left and right by the step difference 4a of the return lever 4 (see FIG. 4) and the switch 8 is still on. On the other hand, the up-down plate 12 pushes the elevation shaft up, so that the needle tip of the towing arm 1 rises from the record surface.

The return lever 4 further moves in the direction of the arrow 4c and when the drive cam 5 rotates 200 ° from the stop position in contact with the pin 19 of the pickup plate 2, the tow arm 1 The switch base 9 and the up-down plate 12 remain open as shown in FIG. 1 (see FIG. 4), and the drive cam 5 rotates the remaining 160 ° to return the lever 4. Is moved in the returning direction (arrow 4d) and the drive cam 5 is stopped by one rotation.

This state is a state where the tow arm 1 is completely returned to its original position and is shown in the body 1 diagram, and each of the pins 10 and 13 of the switch base 9 and the up-down plate 12 opened in both axes returns. It moves inward with the step difference of the lever 4 and the knob 8a of the switch 8 springs to the left end side of the linear pickup plate 3 and the up-down plate 12 is also springed to the position of the step difference respectively. By the tension of 18, the knob 8a of the switch 8 is turned off, the elevation shaft is lowered, and the towing arm 1 on the elevation sheet is accommodated in the arm stop. This completes one cycle of operation.

When playing again, take out the tow arm (1) from the arm stop, go through the center of the turntable, and switch (8) is turned on at the end of the record groove of the record, Likewise, the tow arm (1) is placed on the outer periphery of the record. The needle tip placed on the recorder enters the inner circumference of the record and the tow arm 1 comes to the position indicated by the sieve 3 degrees, and the driving cam 5 rotates, the tow arm 1 of the sieve 4 degrees, the lever 17, The tow arm 1 passes over the turntable shaft gear 7 and returns to the arm stop, in the form of a drive cam 5, a return lever 4, a switch base 9, and an up-down plate 12. do.

[Application Example]

The present invention relates to a power switch mechanism relating to an automatic return mechanism in a record player, but the present invention adds a lever retaining the return lever 4 and the pickup plate 2, and then returns the return lever 4 to the automatic return mechanism. By interlocking the record size selector, it can be developed into a fully automatic mechanism.

When this is enabled, the towing arm moves from the rear of the record player and automatically descends to the outer periphery of the record so that the towing arm returns to the rear of the record player again after playing the record. do.

The present invention has the configuration and operation as described above. The tow arm on the recorder surface is accidentally removed because the ton arm stored at the rear of the record player is removed from the arm stop and the turntable does not rotate unless the center of the turn table is exceeded. Even if the needle tip is dropped, the kiteridge needle does not touch the opposite direction and does not hurt the record groove. Moreover, the ton arm will be evacuated to the rear after the end of the recording, so it will not take a long time even if the hand is released.

In addition, the general player uses two clutch plates, but in the present invention, the clutch cam is engaged with the drive cam and the turntable shaft by the action of a magnet (solenoid) when the speed of the tow arm is changed from a fixed position. It has the advantage that there is no instability because it automatically returns.

Claims (1)

It is provided with a pick-up plate (2) fixed to the support rotation part of the towing arm (1) and having a linear outer periphery (3) so that the switch fixed to the switch base (9) is turned off until the towing arm reaches a predetermined position. A switch mechanism of a record player of the type in which a tow arm is stored at the rear of the record player.