JPS634304Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to minute feed and rapid feed of a pick-up feed device used to read information signals from a rotating disk.

Conventionally, the minute feed and rapid feed devices for pick-up mounts varied the rotational speed of the motor. In this case, the drawback was that the motor's rotational speed suddenly increased, resulting in unreasonable use beyond the rated value, or the motor's rotational speed was reduced to a very low speed, resulting in unstable torque.

The present invention was devised to eliminate the above-mentioned drawbacks, and the embodiment shown in the drawings will be described as follows.
As shown in Fig. 2, the shaft 17 is
, and the drive pulley 13 rotates in the direction of arrow A. The rotational force drives pulleys 10 and 12 by drive belt 14. The diameter of the pulley 9 that rotates coaxially with the pulley 10 and the diameter of the pulley 11 that rotates coaxially with the pulley 12 are made different, so that the running direction of the belt 7 that connects the pulley 9 and the pulley 16 and the belt 8 that connects the pulley 11 and the pulley 15 is made different. A belt 7 running in the C direction is suspended by being pressed into contact with tension pulleys 3 and 4 arranged on the left and right sides on the groove outer circumferential surface of a pulley 2 which has different speeds and is rotatably mounted on the center of the lower surface of the pick-up mounting base 1, A belt 8 running in direction B is pressed against and suspended by tension pulleys 5 and 6 disposed on the left and right sides of the groove outer circumferential surface of the pulley 2 opposite to the groove outer circumferential surface, and the pulley 2 is rotated by a speed difference. By rotating the lever 25, which locks the tip in the outer circumferential groove of the pulley 9 or 11, the pulley 9 or 11 is moved to the shaft 2.
0, and when moving downward, the pulley 9 or pulley 11 is driven by the friction pads 23 and 24, and when moving upward, the pulley 9 or pulley 1 is driven by the friction pads 21 and 22.
This is a pick-up moving device that isolates and stops the vehicle.

Since the present invention has the structure described above,
Pulley 2 rotates at a circumferential speed of b/2+c/2,
The mounting base 1 is slightly fed at b+c/2-c, and when the pulley 9 is moved upward and stopped, the belt 7 is stopped, and the mounting base 1 is rapidly moved to the right at a speed of b/2. When the pulley 11 is stopped, the belt 8 is stopped and the mounting base 1 is rapidly moved to the left at a speed of c/2. Also, belt 7 and belt 8
When the movement of the mounting base 1 is stopped, the movement of the mounting base 1 is stopped.

As mentioned above, in this invention, for example, one side of an information recording disk with a diameter of 12 cm is regenerated over an hour, so in order to stabilize minute feed and return or fast forward in a few seconds, it is necessary to reverse the direction. , which utilizes the speed difference between two types of belts that have different speeds.
The motor always rotates within the rated range and provides stable torque, and the speed ratio is large. Small speed changes can be made by changing the motor's rotation speed, and the structure is simple and an excellent idea.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the present invention, Fig. 2 is a sectional view of pulleys 9, 10 or pulleys 11, 12, 1 is a mounting base, 2 is a pulley, and 7, 8 are belts.

Claims (1)

[Scope of utility model registration request] A pick-up moving device in which two running belts 7 and 8 running in opposite directions and at different speeds are respectively suspended in opposing grooves of a pulley 2 attached to a pick-up mount 1.