JPS6125042Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a record player, and in particular, in a record player that enables the horizontal rotation of the tone arm by manually operating the operating knob, the present invention relates to a record player in which the tone arm can be horizontally rotated by manually operating the operating knob. The tone arm is configured to automatically cue up and down in response to contact and release of the tone arm.

First, the manual horizontal rotation mechanism of the tone arm will be explained. Reference numeral 1 denotes a tone arm shaft that allows the tone arm 2 to rotate horizontally, and a tone arm lever 3 is attached to the tone arm shaft 1 in addition to the tone arm 2. 4 is an operating knob for horizontally rotating the tone arm, and the movement of this operating knob 4 is transmitted to the tone arm lever 3 via a transmission means 5 . The operating knob 4 faces the surface of the cabinet. The transmission means includes a small pulley 6 provided coaxially with the operating knob 5 , an idler lever 8 rotatable around a support shaft 7, and a shaft 9 mounted on the idler lever 8. It is composed of a large pulley 10 and an idler 11 that are freely supported and rotate integrally, and a belt 12 stretched between the small pulley 6 and the large pulley 10.The large pulley 10 and the small pulley 6 constitute a deceleration mechanism. ing. The idler lever 8 is positioned at the position shown in FIG. 1 by a spring 21 and a stopper 13, and the idler 11 and tone arm lever 3
are spaced apart.

By the way, when rotating the tone arm 2 to a desired position to start playing a record, the tone arm 2, which is queued down on the armrest base 14 in a stopped state, is first queued up and then rotated to the desired position. You need to let it go and then queue it down. Therefore, the present invention is devised so that when a finger is brought into contact with the operating knob 4 in order to rotate the tone arm 2, the cueing up is automatically performed. FIG. 3 shows a switching circuit 15 for this purpose. The terminal 16 is associated with an operating knob 4 made of a conductive material, and when a finger comes into contact with the operating knob 4, the potential on the input side of the inverter 17 decreases, and the output of the inverter 17 becomes high level. .
Then, the transistor 18 is turned on, and the plunger 19 is driven. This plunger 1
If the lifter 20 is raised by 9, the tone arm can be queued up. Further, by rotating the idler lever 8 against the spring 21 using the force of the plunger 19, the idler 11 can be brought into contact with the tone arm lever 3. By operating the operating knob 4 in this state, the tone arm 2 can be horizontally rotated. After moving the tone arm to the desired position, when the finger is released from the operating knob 4, the plunger 19 is turned off and cueing down is performed, and the idler 11 is moved away from the tone arm lever 3 to play the record. state.

In addition, it is recommended to provide a delay circuit on the output side of the inverter 17 so that the cueing down does not occur even if the finger is removed from the operating knob 4 for a very short period of time during the horizontal rotation operation of the tone arm. .

According to the present invention described above, the tone arm can be horizontally rotated by manually operating the operating knob, and in response to the touch and release of the finger on the operating knob of a record player. Queuing up and down can be done automatically,
It is extremely easy to operate.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the horizontal rotation mechanism of the tone arm, FIG. 2 is an external view of the record player, and FIG. 3 is a switching circuit diagram. 1 is a tone arm shaft, 2 is a tone arm, 3 is a tone arm lever, 4 is an operating knob, 5 is a transmission means, 17 and 18 are inverters and transistors that constitute the switching circuit 15 , and 19 and 20 are a cueing mechanism. Plunge, lifter.

Claims (1)

[Scope of utility model registration request] A tone arm shaft that enables horizontal rotation of the tone arm, a tone arm attached to the tone arm shaft, a tone arm lever that responds to the rotation of the tone arm shaft, and a manually operated tone arm. With an operating knob for horizontal rotation. It comprises a transmission means for transmitting the movement of the operating knob to the tone arm lever, a switching circuit that conducts in response to the contact of a finger to the operating knob, and a cueing mechanism driven by the switching circuit, The record player is configured to horizontally rotate the tone arm in a cueing up state by manually operating the operating knob.