JPS5822284Y2 - Automatic arm lifter mechanism for record players - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automatic mechanism that also serves as an arm lifter in a record player.

In conventional record players for automatic performance,
While the arm is being driven automatically, the arm is connected to the arm drive mechanism via a clutch mechanism, so if you manually operate the arm while it is being driven, it will go against the driving force of the drive mechanism. Since the clutch mechanism had to be released by operating the arm, the manual operation did not feel smooth and gave a sense of misalignment.

Furthermore, since the arm is equipped with a lever mechanism etc. for connecting to the clutch mechanism mentioned above, the mass of the arm becomes large, and when tracing the sound groove of a record with light stylus pressure, its tracing ability is Compared to the arm of a record player, which is operated by hand, the arm of the record player has the disadvantage that it is more prone to malfunction.

This idea was developed to correct the above-mentioned shortcomings, and the first purpose was to install an auto-start return mechanism independent of the arm into the arm lifter so as not to put a load on the arm and cause performance deterioration. An object of the present invention is to provide an automatic mechanism that also serves as an arm lifter in a record player incorporated in a record player.

A second object of this invention is to provide an automatic mechanism that also serves as a lifter in a record player that does not cause a decrease in arm sensitivity or malfunction when tracing grooves on a record.

Next, an embodiment of this invention will be described with reference to the drawings.

1 is a non-slip rubber or other material provided on the top surface of the main body, 2 is the main body of the automatic mechanism that also serves as an arm lifter, 3 is a stand that supports the main body, and 4 is a main body fixing nut for attaching the main body to the mounting plate 11 of the record player. .

Reference numeral 5 denotes a lifter rotation gear that rotates the lifter when the main body is in the raised position shown by the two-dash chain line, and is engaged with the arm rotation detection gear T to form a rotation drive mechanism 10.

6 is a lid plate that controls the vertical movement of the main body; 8 is an arm lifter plate having rubber or the like attached to its lower surface; and 9 is an arm.

Next, to explain the operation of the automatic arm lifter mechanism of this invention, the arm lifter plate 6 operates to push up the main body 2, which is always urged downward by a spring or the like, and the lower surface of the arm lifter plate 8. The anti-slip 1 comes into contact with the arm 9 and lifts the arm 9 at position 1 shown by the two-dot chain line in FIG.

At the same time, a rotational drive mechanism 10 composed of an arm rotation detection gear 7 that moves in either the left or right direction and a lifter rotation gear 5 that engages with the arm rotation detection gear 7 is operated, and the main body 2 is rotated as shown in FIG. Rotate it in either the left or right direction.

The end of the arm lifter plate 8 opposite to the end at which it is attached to the arm 9 is located eccentrically from the center of the main body 2, so that when it is placed on the main body 2, it does not touch the anti-slip member 1. The arm 9 is rotated by moving either up or down in FIG. 3 due to friction.

For example, as shown in Fig. 3, when the main body 2 rotates to the right, the arm lifter plate 8 moves upward and the arm 9 is also pulled upward, but conversely, the main body 2 rotates to the left. Then, the arm 9 is pushed back downwards.

In this way, when a preset amount of arm rotation is reached, the operation of the lifter plate 6 is released by a known appropriate arm rotation detection mechanism that controls the lifter plate 6 and the rotational drive mechanism 10, and the main body 2 is released from the spring. The force causes it to descend and stop rotating.

As a result, the raised arm will either come to the playing position or
The cabinet returns to its rest position.

As described above, the arm lifter/automatic mechanism of this invention does not have a mechanism directly assembled to the arm body as in the past, so there is no burden on the arm and there is no deterioration in performance.

It is also suitable for mounting on record players that currently have an automatic mechanism, and since the structure for moving the arm directly utilizes the rotation of the arm, it is stable and less likely to malfunction.

[Brief explanation of the drawing]

The figures show an embodiment of the arm lifter-cum-automatic mechanism in the record player of this invention.
The figure is a longitudinal sectional view of the main part, and FIG. 3 is a plan view of the main part. 2...Main body, 5...Lifter rotation gear,
6... Lifter plate, 7... Arm rotation detection gear, 8... Arm lifter plate,
10...Rotation drive mechanism.

Claims (1)

[Scope of utility model registration request] an arm; an arm lifter plate fixed to the lower surface of the arm; a non-slip surface located on the lower surface of the arm lifter plate and in contact with the plate; and the plate placed at an eccentric position. an automatic mechanism main body that also serves as an arm lifter, a lifter plate that controls the vertical movement of the main body, a rotational drive mechanism that rotationally drives the main body raised by the lifter plate, and a rotation drive mechanism that detects the rotation of the arm and controls the lifter. An automatic arm lifter mechanism for a record player comprising an arm rotation detection mechanism for controlling the operation of a plate and a rotation drive mechanism.