JPS5816241B2 - record controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a record playing device that can play both sides of a record simultaneously or sequentially one side at a time.

In conventional record playing devices, the diameter of the turntable that holds the record horizontally and rotates it while holding it is large enough to cover all or part of the side groove on the bottom side of the record. Only the top side of the record can be played.

It is fine if it is a short piece of music that fits on only one side, but if it is a long piece that continues on both sides, it is necessary to stop the device once in the middle of playing, turn the record over, and then start the device again.

This is not only troublesome, but also seriously hurts the viewing mood.

Furthermore, since the record rotates horizontally, a horizontal area larger than the diameter of the record is required for both width and depth.

Furthermore, since the pickup of the conventional device moves in an arc, the direction of vibration of the pickup deviates greatly from the normal direction of the sound groove curve, causing a tracking error and preventing correct reproduction of sound.

The object of the present invention is to provide a record playing device that does not have the above-mentioned drawbacks.

Below, the basic concept of the record playing device according to the present invention will be explained with reference to the drawings. 1 indicates an L-shaped fixed frame; 2
The rotary disk has a horizontal rotation axis and is rotatably supported at the upper end of a fixed frame 1, and its diameter is made smaller than the diameter of the end group (innermost sound groove) of the record.

Reference numeral 3 denotes an electric motor that is attached to the fixed frame 1 and drives the rotary disk 2.

(In the illustrated example, the rotary disk 2 is directly connected to the electric motor, but it may be driven by a belt or the like, taking into account vibrations.

) 4 is an L-shaped movable frame, 5 is a pin that hinges the lower end of the movable frame 4 to the lower end of the fixed frame 1, and 6 is a rotary plate 2 rotatably supported on the upper end of the movable frame 4. It is a push platform with the same diameter as the .

When the movable frame 4 is closed with respect to the fixed frame 1, the pusher 6 correctly faces the rotating disc 2 and sandwiches the record between them.

The pusher 6 has a protruding shaft that passes through the center hole of the record and fits into a hole drilled in the rotary disk 2.

T is a record; 8 is a record support that supports the record 1 when it is inserted or removed; the record support is provided between a fixed base frame 1 and a movable base frame 4, and is separated from the record 1 during performance.

9 is attached to the fixed frame 1 and guides the rotary table 20 along a straight line perpendicular to the center line of rotation; 10 is a pickup that can slide on the guide 9; 11 is attached to the movable frame 4 and is a pusher. Guidance along a straight line perpendicular to the 60 rotation center line,
12 is a pickup that can slide on the guide 11.

In the device having the basic configuration as described above, the movable frame 4 is opened, the record 1 is supported by the record support 8, the movable frame 4 is closed, and the record γ is sandwiched between the rotary table 2 and the pusher 60.

Next, when the electric motor 3 is operated, the record γ rotates.

Next, the pickups 10 and 12 are brought close to the record γ to start playing.

When the performance is finished, the pickups 10 and 12 are separated from the record γ and the electric motor 3 is stopped.

Then remove the record γ.

Although not shown in the above structural description and drawings, there is also a mechanism by which the pickups 10 and 12 quietly and accurately approach and leave the record γ, and a mechanism which returns to the original position on the guides 10 and 12 after playing. shall have a mechanism for operating the pickups 10 and 12 simultaneously or in sequence.

As described above, there is provided a record playing device according to the present invention.

Since the sound grooves on both the front and back sides of the record γ are kept completely exposed as they rotate, both sides can be played successively without having to turn the record 1 over each time one side is played.

Of course, depending on the situation, you can enjoy complex sounds by playing both sides at the same time.

Next, by rotating the record l in a vertical plane, the frontage or depth dimension (
(depending on the direction in which the device is installed) can be made smaller than the diameter of the record l, making it convenient for installation in a narrow room.

Furthermore, the movement of the pickups 10 and 12 during performance is linear and extremely close to the normal line of the sound groove, which greatly contributes to correct sound reproduction.

In other words, tracking errors are eliminated.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the record playing device according to the present invention with the guide and pickup removed, Fig. 2 is a plan view of the movable frame when the movable frame is opened, also shown with the record support removed, and Fig. 3 is the same. FIG. 1 is a fixed frame, 2 is a rotary table, 3 is an electric motor, 4 is a movable frame, 5 is a bottle, 6 is a pusher, γ is a record, 8 is a record support, 9 and 11 are guides, 1° and 12 is a pick up.

Claims (1)

[Claims] 1. A fixed frame, a rotating disk having a horizontal rotating shaft supported at the upper end of the fixed frame and having a diameter smaller than that of the end group of the record, and an electric motor attached to the fixed frame to drive the rotating disk. , a movable frame with a hinge at the lower end of the fixed frame, which is rotatably supported by the movable frame, and when the movable frame is closed against the fixed frame, it faces the rotary disk correctly and the record is placed between them. A push stand sandwiching the frame, a pick-up that is attached to the fixed frame and the movable frame respectively and can slide on guides including straight lines passing through the centers of rotation of the rotary frame and the push frame, provided between the fixed frame and the movable frame, This record playing device is equipped with a record support that supports the record when it is inserted and removed and is separated from the record during play.