JPS6317043Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a static eliminator that removes static electricity charged on a record using ions generated by corona discharge, and the static electricity removal performance is achieved by forcibly spraying the static electricity removing ions onto the surface of the record. The main focus is to improve the

As a means to remove static electricity charged on a record, corona discharge is used to generate ions with a different sign from the charge on the record, and the ions are brought into contact with the surface of the record to remove the charge. It is known that static electricity can be removed by electrically neutralizing the electric charge that is present and the ions that have reached the surface of the board.

However, after the ions generated by corona discharge are generated near the discharge electrode, they immediately recombine and disappear without much diffusion, so the ion density is extremely low when the ions are removed from the vicinity of the electrode. Therefore, in order to obtain effective static elimination performance, it was necessary to increase the discharge current or to place the discharge electrode close to the record surface. However, when the discharge current is increased,
It tends to generate harmful substances such as ozone and nitrogen oxide, and also consumes more power. On the other hand, if the discharge electrode is brought close to the record surface, there is a risk that the discharge electrode may accidentally come into contact with the record and damage it, or that contact with the discharge electrode may result in an electric shock.

Focusing on this fact, this invention pivots the base end of the main case to a spindle protruding from the center hole of the record, and attaches it to the main case while rotating the main case around the spindle over the record. By sending wind through the discharge electrode, the static eliminating ions emitted from the discharge electrode are forcibly blown onto the surface of the record, effectively removing the static electricity charged on the record with the minimum necessary discharge current.
In addition, it is intended to simultaneously blow away the cotton dust adhering to the record disc so that it can be cleaned.

Hereinafter, a specific example thereof will be explained based on the drawings.

In Figures 1 to 3, a is the static eliminator of the present invention, 1 is a turntable for a record player, and 2 is a record player turntable.
3 is a spindle projecting upward from the turntable, and 3 is a record placed on the turntable 1. The spindle 2 passes through the center hole 4 of the record disc 3 and protrudes from the upper surface thereof, and the static eliminator a of the present invention is placed and set on the horizontally supported record disc.

The present static eliminator a has a drive chamber 6 at the base end 5a of a plastic main body case 5 formed in the shape of a long rectangular box along the radial direction of the record disc 3, and an electrode chamber 7 at the case tip 5b. Each section is formed through a partition wall 8. The drive chamber 6 houses a battery 9, a motor 10, and a speed reduction mechanism 11 including a gear group. A guide hole 12 into which the spindle 2 is inserted is provided on the lower surface of the base end portion 5a of the case, and a drive wheel 13 is supported by slightly protruding from the lower surface of the case at a position biased toward the distal end of the case with respect to the guide hole 12. . This drive wheel 13 is in contact with the center side label portion of the record disc 3 and is rotationally driven by a motor 10 and a speed reduction mechanism 11. The length of the electrode chamber 7 is slightly larger than the width of the sound groove portion of the record 3, and the lower surface thereof is opened as an ion emitting port 14. A discharge electrode 15 is inserted into the electrode chamber with a discharge electrode 15 covering the ion emitting port 14. located close together.

The discharge electrode 15 has triangular needle electrodes 17 facing downward and square wind receiving pieces 18 facing upward at regular intervals in the longitudinal direction from an electrode plate 16 that has a constant width in the front and rear and is long in the left and right directions. Each electrode plate 16 is cut and raised, and both left and right ends of the electrode plate 16 are insulated and supported and fixed to the opposing wall of the electrode chamber 7. However, the electrode plate 16 is supported in an inclined position with its distal end being slightly higher than its proximal end, and the opening angle of the wind receiving piece 18 is set to be smaller toward the proximal end of the main body case 5 and larger toward the distal end. shaped electrode 1
A cut-and-raised hole formed when forming the wind receiving piece 7 and the wind receiving piece 18 is used as a ventilation hole 19.

FIG. 4 shows a high voltage generating circuit 20 that applies an AC high voltage to the discharge electrode 15 to generate corona discharge. This circuit 20 generates a pulse signal of about 20 KHz in a saturation blocking oscillator circuit 21 consisting of a feedback coil 21a and a transistor 21b, and converts this signal into a step-up transformer 22 with a voltage of 3 to 15 KHz.
By increasing the voltage to a certain level, a high voltage capable of corona discharge is obtained.

A ventilation window 24 is opened in the upper part of the partition wall 8, and a ventilation fan 25 rotated by a motor 10 together with a drive wheel 13 is installed in the drive chamber 6 through the ventilation window 24.
The structure is such that an air suction port 26 is provided on the outer wall of the drive chamber 6, which is the upper wall in the figure.

Next, to explain how to use the static eliminator a of the present invention and its function, set it on the record 3, fit the spindle 2 into the guide hole 12, and turn on the power switch 2.
7, the drive wheel 13 rotates and the main body case 5 rotates around the spindle 2 on the surface of the record disc 3 in the circumferential direction at a constant speed. At the same time, the high voltage generation circuit 20 is also connected to the battery 9, and a high voltage is applied to each needle electrode 17 of the discharge electrode 15. As shown in FIG. A corona discharge 28 occurs, and positive and negative ions 29 and 30 are generated.
Further, the blower fan 25 rotates together with the drive wheel 13 by the drive of the motor 10, and outside air flows into the electrode chamber 7 through the air suction port 26 and the blower window 24, and then from the ion discharge port 14 through the ventilation port 19. An airflow 31 is generated that reaches the sound groove portion of the record 3, and this airflow 31 forcibly blows positive and negative ions 29 and 30 toward the record 3. When the record 3 is charged with negative ions 32, the aforementioned positive ions 29 are attracted to the charged portion, and both ions 29 and 32 exchange electrons with each other to neutralize them 33 and 32.
34. The negative ions 30 generated during the corona discharge are blown outward by the air flow 31 without remaining on the record. In addition, since the opening angle of the wind receiving piece 18 is changed, the amount of air reaching the record 3 increases from the center side of the record 3 toward the outer circumferential side, so that the main body case 5 can move over the record. Even when turning, the discharge electrode 1
The static eliminating ions from 5 reach the record 3 with a substantially uniform density from the center to the outer periphery.

Although the illustrated example is as described above, the present invention is not limited thereto. For example, if the drive wheel 13 is an idle wheel, the main body case 5
It may be of a type in which it is turned by hand around the spindle 2.

Further, the blower fan 25 can be supported on the output shaft 10a of the motor 10 as shown in FIGS.

The static eliminator a of the present invention may also be used by placing the record 3 on a special stand on which the spindle 2 protrudes upward.

Further, the shape and support method of the discharge electrode 15 can be freely changed, and in particular, the ventilation hole 19 may be made larger toward the tip, and the air volume may be increased toward the tip.

As explained above, according to this invention, ions generated by corona discharge by applying a high voltage to the discharge electrode 15 are transferred to the record disc by the air flow 31 from the ventilation fan 25 before the ions recombine and disappear.
Since it is sprayed aggressively, the static eliminating ions can be used effectively and the static eliminating performance can be improved.

In addition, since the reachable range of the static eliminating ions has been greatly expanded compared to the conventional case, it is not necessary to bring the discharge electrode 15 very close to the record disc 3. Therefore, it is advantageous to prevent damage to the record 3 due to contact and prevention of electric shock to the user.

Furthermore, since the wind blowing against the record disc 3 blows away dust adhering to the disc surface, a cleaning effect can also be expected.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional front view of the static eliminator according to the present invention in use, Fig. 2 is its cross-sectional plan view, Fig. 3 is an exploded perspective view, Fig. 4 is an electric circuit diagram, and Fig. 5 is the static eliminator state. FIG. a... Static eliminator, 1... Turntable, 2...
Spindle, 3... Record disc, 4... Center hole of the record disc, 5... Main body case, 5a... Base end of main body case, 5b... Tip end of main body case, 6
... Drive chamber, 7 ... Electrode chamber, 8 ... Partition wall, 9 ...
...power supply (battery), 10 ... motor, 12 ... guide hole, 13 ... drive wheel, 14 ... ion discharge port,
15... Discharge electrode, 16... Electrode plate, 17... Needle electrode, 19... Ventilation port, 20... High voltage generation circuit, 24... Ventilation window, 25... Ventilation fan, 26
...Air intake port, 31...Air flow.

Claims (1)

[Scope of utility model registration request] A main body case 5 in the shape of a long box whose base end portion 5a of the case is pivotally supported by a spindle 2 protruding from a center hole 4 of a record disc 3 and can be rotated in the circumferential direction about the spindle 2 on the record disc; A discharge electrode 15 is disposed in a position facing the ion discharge port 14 opened on the lower surface of the main case 5 from the base end 5a of the main body case 5 to the case distal end side, and a high-voltage electrode 15 that applies a voltage to the discharge electrode 15 to generate a corona discharge. Voltage generation circuit 20 and the record disc 3 from the ion discharge port 14 through the vicinity of the discharge electrode 15 from inside the main body case.
A static eliminator for record discs, which includes a blower fan 25 and a motor 10 for driving the fan, which forms an air flow 31 toward the disc surface.