JPS5819681Y2 - Tone arm assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tone arm assembly, and more particularly to a tone arm assembly that is integrated with a tone arm rest.

When setting individual components such as a turntable and tone arm in an audio player cabinet, the position of the tone arm must be determined according to the position of the turntable, taking into account overhang, but at the same time, it is necessary to The height of the tone arm must be adjusted so that the tone arm is horizontal.

Furthermore, when replacing the cartridge, if the type of cartridge is different, the tone arm may be tilted with respect to the record surface, and therefore, it is necessary to adjust the levelness of the tone arm with respect to the record surface.

To make this adjustment, place the stylus tip on the record and move the tone arm holder up and down so that the tone arm pipe is horizontal.

During this adjustment, the tone arm can move both horizontally and vertically, so the arm pipe part that is integrated with the cartridge must be held horizontally by hand to prevent it from moving, which is extremely complicated and requires caution. The process requires a lot of pressure, and sometimes force is applied inadvertently, damaging the record or cartridge stylus.

An object of the present invention is to provide a tone arm assembly that does not damage a record or a cartridge stylus during vertical adjustment of the tone arm.

The present invention will be explained using drawings.

1 and 2 are a perspective view and a sectional view of an embodiment of the present invention.

In the figure, tone arm 1 is supported by tone arm holder 2 at one point, and tone arm 1 is supported by tone arm holder 2 at one point.
The holder 2 can be rotated freely in the vertical direction around the holder 2, and can also be rotated in a horizontal plane, that is, on the record disc, by rotating the holder 2 in the horizontal direction.

A weight 3 for adjusting the stylus pressure of the cartridge stylus on the record is attached to the rear extension of the tone arm 1.

Further, the tone arm 1 is supported by an armrest 4 at a point, that is, in front of the holder 2, and is
The rail was held horizontally in cooperation with the support of.

This armrest 4 is rotatably attached to an arm shaft 5 that supports the rotation of the holder 2 with a ring 4', and by turning a knob 6 provided on the ring 4', the holder 2 can be rotated, that is, the tone arm can be rotated 10 times. The armrest 4 is rotated as one body around the arm shaft 5, and by rotating the soma □6 in the opposite direction, the armrest 4 is fixed on the arm shaft 5, and the armrest 4 is locked in that position. .

Note that 13 is a stopper provided on the arm shaft 5 to support the ring 4' of the armrest 4.

Further, a pin 14 is implanted in the arm shaft 5, and this pin 14 fits into a vertical groove 16' on the upper part of the retaining ring 16 of the arm stand 15. It engages with the spiral groove 1' of the ring 7.

The arm stand 15 is fixed by inserting the cylindrical portion of the retaining ring 16 into the record player main body 18 and tightening it from below with a nut 17.

The arm shaft 5 of the tone arm is guided and held vertically within the holding ring 16.

Note that the retaining ring 16 may be provided with a fixing means such as a screw for fixing the arm shaft 5 after vertical adjustment.

By turning the upper and lower rings 7, the pin 14 of the arm shaft 5 moves within the spiral groove 1' of the upper and lower ring 1 while being guided by the vertical groove 16' of the retaining ring 16. ) 475E It has a structure that allows it to be moved up and down while maintaining the mutual positional relationship.

Some details of the armrest 4 are shown in FIGS. 3a and 3b.

As shown in the figure, the armrest includes an armrest bar 8 attached to the arm shaft 5 and extending horizontally, and a member 9 for receiving and holding the tone arm 1, and further for holding the arm so that the armrest 4 can move upward. Part 9
The armrest parr 8 includes a member 10 that is rotatable in a vertical plane about the tip of the armrest parr 8.

The member 10 is formed in an L-shape, and one end thereof is attached to the arm holding member 9 in order to support the arm holding member 9, and the other end is attached to the tip of the bar 8 via a hinge 11.

When the tone arm 1 is held on the holding member 9 by rotating the rotating member 9' counterclockwise, the tone arm 1 becomes horizontal and does not rotate downward due to the hinge 11 ( A member 12 is provided which is formed integrally with the character-shaped member and contacts the lower surface of the bar 8.

Therefore, when the tone arm 1 is held by the holding member 9, as shown in FIG. Retained.

On the other hand, when the tone arm 1 is lifted upward, the hinge 11 causes the holding member 9 and the single-shaped member 10 to rotate in a vertical plane around the tip of the bar 8, so that the tone arm 1 does not come off the holding member 9. I can do it.

A method of adjusting the height of the record surface of the tone arm using the above-described configuration will be described.

First, turn the knob 6 to unlock the armrest 4 so that it can rotate together with the tone arm 1 and holder 2.

After that, when these are rotated together and the stylus is placed on the record, the rotation is locked by turning the knob 6.

Then, turn the upper and lower rings 1 to adjust the height of the tone arm.

At this time, the tone arm 1 is attached to the holding member 9 of the armrest 4.
Since the record is held horizontally, the levelness with respect to the record surface is already maintained, and only the upper and lower rings 7 need to be adjusted, and there is no need to apply unnecessary force to the tone arm or stylus. It will not cause any damage to others.

After making that adjustment, turn knob 6 again to adjust the tone arm.
When the holder and armrest are rotated and the tone arm is positioned outside the surface of the record, the rotation of the armrest 4 is locked by a knob 6.

In this case, the stylus needle of tone arm 1 is in contact with the record immediately after adjustment, so if you lift tone arm 1 upward so that it does not come into contact with the record surface and rotate the armrest etc., the record will not be damaged. .

As mentioned above, since the armrest can be used to adjust the height of the tone arm, the height can be easily adjusted without damaging the record or cartridge stylus.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a sectional view of FIG. 1, and FIGS. 3a and 3b are partially detailed views of an armrest. Explanation of the symbols of the main parts, 1...Tone arm, 2...
・Holder, 4...armrest, 6...knob,
γ...Upper and lower ring, 8...Armrest par 9.
... Tone arm holding member, 11... Hinge.

Claims (2)

[Scope of utility model registration request] (1) a tone arm, a holder that supports the tone arm and serves as a central axis of rotation of the tone arm in a horizontal plane, and an arm shaft that rotatably supports the holder;
an armrest for holding the tonearm; a mechanism for rotating the armrest integrally with rotation of the tonearm and the holder; and a locking mechanism for locking rotation of the armrest in relation to the arm axis. A tone arm assembly characterized by: (2) The tone arm assembly according to claim (1), wherein the armrest is rotatably attached to the arm shaft.