JPS5931122B2 - record suction cup - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a record suction cup that can be easily attached to a conventional record player and that can suction a record to improve the sound quality of a record performance.

Modern records are made of vinyl-based materials and are thinner and lighter.

With such a light record, the record tends to vibrate when external vibrations are transmitted to the record. If the record is warped, it is particularly likely to vibrate. For this reason, the sound quality of the record performance becomes unstable, vibration noise is included in the record performance sound, and howling is likely to occur. To prevent this, for example, by gluing the record to the turntable and integrating it, the record becomes stable, unnecessary vibrations transmitted to the record can be minimized, and the sound of the record playing is improved. The general consensus is that it improves tremendously. However, since it is generally not practical to glue a record to a turntable, in order to get as close to this condition as possible, a heavy record stabilizer is placed in the center of the record to stabilize it somewhat. There is an attempt to improve the sound of a record by increasing the sound quality. However, such conventional record stabilizers cannot be said to sufficiently stabilize records, and the actual situation is that clear and good record performance sounds similar to those of live performances cannot yet be obtained.

This invention was made in view of the above circumstances, and can be easily attached to a conventional record player by placing a disc on the turntable of the record player and adsorbing the record to the disc. Moreover, it is an object of the present invention to provide a record suction cup capable of obtaining a record playing sound of much clearer quality and better sound quality with a simple structure and operation.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Reference numeral 1 in FIG. 1 is a disk, and this disk 1 is composed of an upper disk lb having a recess 1a, a lower disk lc, and a core Id. The lower surface of the disc 1 has a pin hole 4 that fits into the center pin 3 of the evening table of a commonly used record player, and the upper part of the disc 1 has a pin 5 that fits into the center hole of a record. Each of them is provided to be positioned on the central axis of the disk 1. Further, a circular recess 7 is formed in the center of the upper surface 6 of the disc 1. This recess 7
An annular tapered surface 8 is formed on the outer periphery of the bottom. An annular sealing member 9 having a tongue-shaped cross section is attached to the tapered surface 8 . This sealing member 9 is made of a flexible material such as rubber having appropriate elasticity, and as shown in FIG. 5, its thickness is thick at the mounting base, thin at the tip, and gradually becomes thinner from the mounting base to the tip. The distal end protrudes above the upper surface 6 of the disc 1 when it is free. Further, on the outer peripheral portion of the upper surface 6 of the disk 1, a circular tapered surface 10 is formed which extends one step lower than the upper surface 6. This tapered surface 10 has a tongue-shaped cross section similar to the seal member 9 in which the distal end of the seal member 9 is located on the inner side of the seal member 9, whereas the distal end is located on the outer side of the seal member. An annular seal member 11 made of a flexible material such as rubber and having appropriate elasticity is attached. Note that this seal member 1
1 airtightly seals between the upper surface 6 of the disc 1 and the record 12 placed on the upper surface 6. Further, the upper surface 6 of the disc 1 has annular grooves 13 and 14 as shown in FIG.
, 15 and a linear groove 16 communicating these grooves 13, 14, 15 are provided. Further, a tank 17 is formed inside the disc 1. This tank 17 is a disk 1
A space is provided inside the space, and ribs (reinforcing portions) 18 are interposed in the space to prevent the disc 1 from deforming due to external pressure when the space is depressurized. Rib 18
are arranged radially within the tank 17 of the disk 1, as shown in FIG. A gap is provided between the center part or the outer peripheral part of the plate 1. The tank 17 and the grooves 1 and 4 communicate with each other through a communication hole 20 provided between them. Further, a valve 21 is attached to a predetermined location on the outer circumference of the disc 1. This valve 21
This valve includes a tubular valve box 24 having a valve seat 22 at one end and a pipe connection 23 at the other end, a valve body (ball) 25 made of rubber, for example, located adjacent to the valve seat 22, and a valve body 25 made of, for example, rubber. It consists of a spring 26 provided in the valve box 24 so as to always bias the body 25 toward the valve seat 22, and a vacuum device (vacuum pump) ( (not shown) can be connected. Further, a needle valve 27 is attached to a predetermined location on the outer periphery of the disc 1. The needle valve 27 consists of a valve box 28 and a substantially needle-shaped valve body 29 that is screwed into the valve box 28 so as to be able to move forward and backward. A valve seat 31 is provided. A through hole 32 is formed at the tip of the valve body 29 in a direction perpendicular to the axial direction of the valve body 29.
A communication hole 33 is formed in the center of the valve body 9 so that the outside of the valve body 29 and the through hole 32 communicate with each other. When playing a record using a record player, the disc 1 is placed on the turntable of the record player with the pin hole 4 fitting into the center pin 3 of the turntable.
Next, place the record 12 on the pin 5 on the upper surface 6 of the disc 1.
This record disc 12 is placed by fitting the center hole of the disc. As a result, the sealing member 9 is attached to one side of the record 12.
, 11 come into contact with each other, and the space between the record 12 and the upper surface 6 is airtightly sealed. In addition, the sealing part material 9, 1
The portion where 1 comes into contact with the record 12 is a portion of the record 12 where no tone grooves are carved. Next, needle valve 2
7, screw its valve body 29 into the valve box 28 to close it, and close the valve 2.
A connecting tube (not shown) is inserted into the tube connecting portion 23 of 1, and an operating vacuum device (vacuum pump) (not shown) is connected through this connecting tube. Then, the valve body 25 is moved by the spring 26
It is sucked away from the valve seat 22 in the direction of the pipe connection port 23 against the force, and as a result, an air passage is created in the valve 21 and the pressure inside the tank 17 is reduced.
, 14, 15, the air between the top surface 6 and the record plate 12 is sucked into the vacuum device. As a result, the record 12 is attracted to the upper surface 6 of the disc 1. Then, after an appropriate period of time has elapsed, the connecting pipe is pulled out from the pipe connecting port 23.
Then, the valve body 25 receives the biasing force of the spring 26 and the tank 1.
The valve seat 22 is brought into contact with the valve seat 22 due to the suction action of the negative pressure inside the valve 7, thereby closing the air passage of the valve 21. Note that the adsorption of the record 12 to the upper surface 6 is permanent because the inside of the tank 17 having a large volume becomes negative pressure. Here, when the turntable is rotated, the disc 1 rotates together with the turntable due to the frictional force between the turntable and the disc. Therefore, with the record 12 being attracted to the top surface 6, the record needle of the record player is lowered onto the record 12, and an electrical signal is extracted from the record 12 via a pickup (not shown). In this case, since the record 12 is suctioned and fixed to the top surface 6 of the disc 1,
The vibration of the record 12 is significantly reduced, and the record 12
Transmission of unnecessary vibrations from the record stylus to the record stylus is drastically reduced, making it possible to obtain a much clearer and better record playing sound than before. Note that the thickness of the disc 1 is about 7 mm to 8 mm.
Also, according to experiments, the vacuum pressure required to attach the record 12 to the top surface 6 of the disc 1 is 20 m! Hg or so is sufficient, so the vacuum device and tank 17 may be small. Then, when adsorption of the record 12 to the upper surface 6 of the disc 1 is not necessary,
For example, when removing the record 12 from the disc 1,
By opening the needle valve 27 by turning its valve body 29, the atmosphere flows into the tank 17 through the communication hole 33, the through hole 32, the valve chamber 30, and between the valve body 29 and the valve seat 31. As a result, the adhesion of the record 12 to the upper surface 6 of the disc 1 is released. Thereby, the record disc 12 can be easily removed from the top surface 6. Therefore, according to the record suction cup of this embodiment, by simply placing the disc 1 on a conventional turntable and adding one small vacuum device,
Since it can be applied to most conventional record players as is or by slightly adjusting the height of the tone arm, it can be widely used and is economical. In the above embodiment, the valve 21 and the needle valve 27 were attached to the outer periphery of the disc 1 as a mechanism for adsorbing the record 12 to the upper plate 6 of the disc 1, but the invention is not limited to this. , these valves 21, needle valves 27
For example, a configuration as shown in FIG. 8 may be used without providing the.

That is, the pin 41 to which the record disc 12 is fitted includes a lower pin 42 and an upper pin 43 located on an extension of the central axis of the lower pin 42 and screwed into the lower pin 42. The upper end of the upper pin 43 has a conical surface 4.
3a is formed. The lower pin 42 is embedded in the center of the upper disk 1b, and a recess 44 is provided in the upper part of the lower pin 42, and the bottom of the recess 44 is a conical surface to form a valve seat 45. . Further, a groove 46 is formed on the lower surface of the lower pin 42, and this groove 46 communicates with the recess 44 through a communication hole 47. Moreover, the groove 46 is
d, and this groove 48 communicates with the tank 17. Further, a through hole 49 is formed in the center of the upper pin 43. A spherical valve body 50 is placed on the valve seat 45, and the through hole 4 is formed in this valve body 50.
One end of a valve stem 51 loosely inserted into the valve stem 9 is attached, and a spherical knob 52 is attached to the other end of the valve stem 51 protruding from the upper pin 43. Further, a spring 53 is provided within the recess 44 to constantly bias the valve body 50 toward the valve seat 45 . When adsorbing the record 12 to the upper surface 6 of the disc 1, the vacuum device (
A tube 54 (not shown) is connected to the upper end of the upper pin 43, and the knob 52 and valve stem 51 are inserted into the tube 54 to cover the upper end of the upper pin 43. Then, the valve stem 51 and the valve body 50 are sucked up against the force of the spring 53, and the recess 44 and the communication hole 47 are brought into communication, and the upper surface 6 of the disc 1 and the record disc 1 are connected.
2 and the air in the tank 17 through the groove 48, the communication hole 47,
The record disc 12 is sucked into the vacuum device through the recess 44, the through hole 49, and the tube 54, and thereby the record 12 is attracted to the upper surface 6. The tube 54 is removed after an appropriate period of time. Then, the valve body 50 immediately comes into contact with the valve seat 45 due to the force of the spring 53 and the negative pressure inside the tank 17, so that no outside air flows into the tank 17 at this time. In addition, after playing a record, for example, the record 12 can be moved to the disk 1.
When removing it from the valve stem 51, pinch the knob 52 and remove it from the valve stem 51.
When the valve body 50 is pulled up against the force of the spring 53, outside air flows into the tank 17 through the through hole 49, the recess 44, the communication hole 47, and the groove 48, and further flows into the tank 17 through the communication hole 20.
Since it flows between the upper surface 6 and the record disc 12 via the record disc 12, the record disc 12 can be easily removed. As explained above, according to the present invention, since the disc is placed on the turntable of the record player and the record is sucked onto the disc, it can be easily attached to a conventional record player. Moreover, it has a small and simple structure, and when playing, it is possible to securely adsorb and fix the record to the disk with a simple operation, so the vibration of the record can be greatly reduced, and the needle can be easily removed from the record. Because the transmission of unnecessary vibrations to the
Much clearer and better record performance sound quality than before can be obtained.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing one embodiment of the present invention, FIG. 2 is a partial vertical sectional view taken along the - line, FIG. 3 is an enlarged sectional view of the inside of FIG. 1, and FIG. Fig. 1 is an enlarged sectional view of the inside, Fig. 5 is an enlarged longitudinal sectional view of the main part, Fig. 6 is a plan view thereof,
FIG. 7 is a cross-sectional plan view taken along the line - in FIG. 1, and FIG. 8 is a partial vertical cross-sectional view showing another embodiment of the present invention. 1...disk, 3...center pin, 4...
...Pin hole, 5,41...Pin, 6...
...Top surface, 9, 11... Seal member, 12.
...Record, 13, 14, 15, 16...
...Groove, 46,48...Groove, 17...
・Tank, 18...Rib (reinforcement part), 20, 33
......Communication hole, 47...Communication hole, 21.
... Valve, 27... Needle valve.

Claims (1)

[Claims] 1. A pin hole that fits into the center pin of the turntable of a record player is placed on the bottom surface of the disc, and a pin that fits into the center hole of the record is located on the center axis of the disc, respectively, on the top of the disc. furthermore, a sealing member is provided on at least the outer peripheral portion of the upper part of the disc for airtightly sealing between the upper surface of the disc and a record placed on the upper surface of the disc; A groove is provided on the upper surface of the disc for attaching the record to the upper surface of the disc, and a space is provided inside the disc in which a reinforcing part is interposed so that the disc does not deform when the pressure is reduced. to form a tank;
The tank and the groove are communicated through a communication hole provided between the tank and the groove, and the pin or the outside of the disk is connected to at least one of the disk and the pin provided on the disk. A record suction cup characterized by being provided with a mechanism that can freely communicate with and disconnect from a tank and connect a vacuum device.