Discharger

Abstract

To provide a technology for reducing noise that affects sound quality in ground reinforcement.SOLUTION: A discharger attached to the ground of an electric circuit including an audio circuit includes a terminal portion connected to the ground on one side and a discharge portion in which one end of a bundle of multiple linear conductors is gathered together on the other side, the terminal portion and the discharge portion are electrically connected via an intermediate portion, the intermediate portion is covered with an insulator, and the discharge portion has protrusions that extend radially.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a discharger that is attached to the ground of an electronic device that includes an audio circuit, and more particularly to a technique for improving audio quality using a discharger. [Background technology]

[0002] Conventionally, in audio circuits, the ground has been strengthened or a virtual earth has been used to improve sound quality. However, there is a limit to how much the ground can be strengthened within the limited space of the housing, and improvements using virtual earths are often unable to fully address the degradation of sound quality caused by high-frequency noise. Therefore, there was a need for technology that could reduce the deterioration of sound quality caused by high-frequency noise components in a way that addressed the issues surrounding the ground.

[0003] To address these problems, various techniques have been proposed. For example, a technique for wiring a virtual earth material (see Patent Document 1) has been proposed and is a publicly known technique. More specifically, the virtual earth material is a mixture containing aramid fiber, aluminosilicate, calcium silicate, amorphous silica, activated carbon, and powdered rubber, and contains synthetic zeolite as the aluminosilicate. However, there is no description of how to improve the sound quality caused by noise of high frequency components, and the above problem is not solved. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 7252687 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention takes into consideration the problem of improving sound quality degradation caused by noise in audio equipment, and solves the problem by removing noise within the equipment by attaching a discharger to the ground of the equipment or the ground of a virtual earth. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention employs a means having, on one hand, a terminal portion connected to ground, and on the other hand a brush portion formed by bundling one end of a bundle of multiple linear conductors, the terminal portion and the brush portion being electrically connected via an intermediate portion, the intermediate portion being covered with an insulator, and the brush portion extending radially.

[0007] Furthermore, the present invention employs a means in which the linear conductor is made up of a plurality of thicknesses, and the material or coating state differs for each thickness.

[0008] The present invention also employs a means in which the linear conductor comprises a first linear conductor made of an uncoated high-purity oxygen-free copper wire, and a second linear conductor which is thinner than the first conductor and made of a silver-coated high-purity oxygen-free copper wire.

[0009] In addition, the present invention employs a means in which the intermediate portion is composed of a coaxial cable, the inner conductor and outer conductor of the coaxial cable are connected to the terminal portion, the inner conductor of the coaxial cable is connected to the brush portion, the brush portion comprises the inner conductor and a group of linear conductors, one of which is twisted and the other of which is radial, there are multiple linear conductor groups, and the inner conductor and the linear conductor groups are crimped with a ring sleeve.

[0010] Furthermore, the present invention employs a means for connecting a virtual earth between the ground and the discharger. Effect of the Invention

[0011] According to the discharger of the present invention, by connecting the discharger to the ground of equipment including audio, noise within the equipment is eliminated, thereby improving sound quality. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a system diagram showing an embodiment of a discharger according to the present invention. [Diagram 2] 1 is an overall view of a discharger showing an embodiment of a discharger according to the present invention; [Diagram 3] 1 is a schematic cross-sectional view of a discharger showing an embodiment of the discharger according to the present invention. [Figure 4] 1A to 1C are diagrams showing an assembly process of a discharger showing an embodiment of the discharger according to the present invention. [Diagram 5] FIG. 13 is a diagram showing another embodiment of a discharger according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The greatest feature of the discharger according to the present invention is that it can improve sound quality by removing noise within the device. The overall shape and the shapes of each part of the discharger shown in this embodiment are not limited to the embodiments described below, but can be modified within the scope of the technical idea of ​​the present invention, i.e., within the range of shapes and dimensions that can achieve the same functional effects.

[0014] The present invention will be described with reference to FIGS. FIG. 1 is a system diagram showing an embodiment of a discharger according to the present invention. Fig. 2 is an overall view of a discharger showing an embodiment of the discharger according to the present invention, where (a) shows a case where a single linear conductor is used, (b) shows a case where multiple types of linear conductors are used, and (c) shows a case where a coaxial cable is used in the middle section. Fig. 3 is a schematic cross-sectional view of a discharger according to the present invention that uses a coaxial cable. FIG. 4 is a diagram showing an assembly process of a discharger showing an embodiment of the discharger according to the present invention, where (a) to (c) show the assembly process and (d) is a diagram of the finished product.

[0015] The discharger 1 is connected to the ground and dissipates unnecessary noise components contained in the ground into space in the form of discharge. The discharger 1 is composed of a terminal portion 10, an intermediate portion 20, and a brush portion 30. More specifically, it is a discharger that is attached to the ground of an electric circuit including an audio circuit, and has a terminal portion connected to the ground on one side and a discharge portion made of a plurality of conductors on the other side, and the terminal portion and the discharge portion are electrically connected via an intermediate portion, The middle portion is covered with an insulator, and the emission portion has protrusions extending radially outward.

[0016] The terminal section 10 is a section that connects the discharger 1 to ground. Specifically, it is a section that connects to a screw portion of the frame ground 62 of the audio device 21 or to a discharger side connection section 72 of the virtual earth 70. The shape of the terminal is not limited as long as it is called an electrode terminal, but generally, it is U-shaped or ring-shaped. In this embodiment, it is U-shaped. This is because it can be connected by simply loosening the fixing part of the other side, and it is easy to attach and detach. When the threaded portion of the frame ground 62 and the discharger side connection portion 72 of the virtual earth 70 are made up of male and female threads, a shape that is easy to clamp with both screws and difficult to fall off is appropriate. The terminal portion 10 includes a crimping portion 11. This portion has a shape such as a ring, and sandwiches an electric wire or the like and is crimped with a crimping tool or the like to integrate the terminal portion 10 and the electric wire or the like and electrically connect them to each other. The crimping portion 11 fixes one end of the electric wire 21 of the intermediate portion 20 and establishes electrical continuity between the electric wire 21 and the terminal portion 10 . In this embodiment, the connection is made by crimping, but soldering, welding, etc. may also be used.

[0017] Intermediate portion 20 is a portion that connects terminal portion 10 and brush portion 30. Terminal portion 10 and brush portion 30 are electrically connected by electric wire 21, and are surrounded by insulating portion 50. The ends of insulating portion 50 are sealed without gaps with hot bonds 52. Since the gaps are sealed with hot bonds 52, intermediate portion 20 is completely covered with insulation. If the intermediate portion 20 is not covered with an insulator, noise that would normally be emitted from the brush portion would be emitted from the intermediate portion 20 toward the frame ground 62, which is relatively close to the intermediate portion, or toward the virtual earth 70, and the noise would return to the ground. By covering the intermediate portion 20 with an insulator, it is possible to ensure that noise is emitted only from the brush portion. A heat shrink tube 51 is suitable as the insulating portion 50. The heat shrink tube 51 is a tube that shrinks when hot air of about 120 degrees is applied to it. By heating, it shrinks, and the gap at the end of the insulating part 50 can be reduced.

[0018] The electric wire 21 may be directly extended to the brush portion 30 as the linear conductor 40 to form the brush portion. Also, the electric wire 21 may be connected to the linear conductor 40 at the brush side end portion, so that the linear conductor 40 forms the brush portion. Moreover, a coaxial cable 22 may be used instead of the general electric wire 21. By using the coaxial cable 22, noise including high frequency can be efficiently sent to the brush portion 30.

[0019] The brush portion 30 is a radiating portion 46 that radiates a noise component that has flowed into the discharger 1 from the ground of the audio device 21 . It is made up of a bundle of multiple linear conductors 40, one end of which is bundled together and the other end is radially expanded. Noise components carried by the ground pass from the terminal section 10 through the intermediate section 20 and are radiated at the brush section 30. In order to increase the amount of radiation, the tips of the linear conductors 40 are arranged radially for about 3 cm. Overall, they are hemispherical. This shape allows for efficient discharge and reduces noise components in the ground.

[0020] The linear conductor 40 is made of a copper wire having a diameter of about 1 mm or less. Since this embodiment is concerned with minute noise components, the lower the resistance of the copper wire, the better. For example, a high-purity oxygen-free copper wire is suitable. In addition, the larger the diameter of the copper wire, the lower the resistance value, so by increasing the diameter, the overall amount of noise transmitted can be increased.In addition, the smaller the diameter of the copper wire, the larger the surface area becomes, so by reducing the diameter, the transmission efficiency of high-frequency noise can be increased. Therefore, linear conductors 40 of a plurality of different diameters can emit noise in a wider range of bands than linear conductors 40 of one type. In this embodiment, a high-purity oxygen-free copper wire having a diameter of 0.5 mm is used as the first linear conductor, and a silver-coated high-purity oxygen-free copper wire having a diameter of 0.1 mm is used as the second linear conductor. The first linear conductor can radiate the entire noise because the diameter of the copper wire is relatively large, while the second linear conductor can radiate noise with higher frequency components because the diameter of the copper wire is relatively small. The surface of the second linear conductor is silver coated to suppress deterioration due to surface corrosion, etc., since the smaller the diameter of the copper wire, the more susceptible it is to corrosion.

[0021] The following describes the virtual earth 70. The virtual earth 70 strengthens the ground of the audio equipment. Generally, the larger the volume and surface area of ​​the ground of the device, the more stable the ground becomes. Therefore, in order to artificially increase the volume and surface area of ​​the ground of the device, a virtual earth 70 is connected. The frame ground 62 of the audio device 60 is connected to the ground side connection portion 71 of the virtual earth 70 . The virtual earth 70 has a layer section 73 made of multiple metal plates stacked inside. This structure expands the volume and surface area of ​​the ground. The terminal portion 10 of the discharger 1 is connected to the discharger side connection portion 72 of the virtual earth 70. The discharger 1 removes high frequency noise that cannot be completely removed by the virtual earth 70.

[0022] 1 shows an example of installation of a discharger 1. This is an example in which a virtual earth 70 is interposed. A terminal portion of the frame ground 62 on the chassis 61 of the audio device 60 is connected to the ground side connection portion 71 of the virtual earth 70 by a cable. The terminal portion 10 of the discharger 1 is connected to the discharger side connection portion 72 of the virtual earth 70. By connecting the virtual earth 70 to the ground of the audio device 60, the capacitance and surface area of ​​the ground are expanded by the layer portion 73 within the virtual earth 70, and the stability of the ground is improved. Noise components flow from the audio device 60 into the virtual earth 70. Of these, noise components with relatively high frequencies enter the discharger 1 and are radiated from the brush portion 30. By doing so, a part of the high frequency noise components in the audio device 60 can be removed, and the sound quality of the audio device 60 can be improved. Further, while FIG. 1 shows an example in which the virtual earth 70 is used, the discharger side connecting portion 72 may be connected directly to the frame ground 62 .

[0023] 2 shows a front view of the discharger 1. (a) shows the basic form. Linear conductor 40 uses only first linear conductor 41. The first linear conductor 41 is a high-purity oxygen-free copper wire having a diameter of 0.5 mm, and is therefore capable of radiating the entire noise. The first linear conductor 41 also serves as the electric wire 21 of the intermediate portion 20. Therefore, the length of the first linear conductor 41 is approximately the combined length of the intermediate portion 20 and the brush portion 30. A part of the first linear conductor 41 is bundled and arranged in the intermediate portion 20, and an end portion thereof is crimped and fixed by the crimping portion 11 of the terminal portion . The first linear conductor 41 is bundled up to the end of the intermediate portion 20, and is radially expanded in a roughly hemispherical shape by the brush portion 30. By expanding the copper wires, the distance between each copper wire increases, enabling efficient noise emission.

[0024] (b) shows a case where the linear conductor 40 is composed of a first linear conductor 41 and a second linear conductor 42. The first linear conductor is a high-purity oxygen-free copper wire with a diameter of 0.5 mm, and the second linear conductor is a silver-coated high-purity oxygen-free copper wire with a diameter of 0.1 mm. By using multiple types of copper wire, it is possible to radiate more high-frequency noise. The other structures are the same as those of (a).

[0025] 13(c) shows a case where a coaxial cable 22 is used in the intermediate portion 20. By using the coaxial cable 22, noise components including more high frequencies can be emitted from the brush portion 30. Details will be described later.

[0026] The structure and assembly process in the case where a coaxial cable 22 is used in the intermediate portion 20 will be described with reference to Figs. Overall, the intermediate section is composed of a coaxial cable, the inner conductor and outer conductor of the coaxial cable are connected to the terminal section, and the inner conductor of the coaxial cable is connected to the brush section. The brush section is structured to consist of the inner conductor and a group of linear conductors, one of which is twisted and the other of which is radial. First, as shown in Fig. 4(a), the terminal portion 10 is connected to the coaxial cable 22. The coaxial cable 22 is, for example, a 75 Ω coaxial cable. The coaxial cable 22 is usually composed of a core wire 23 (hereinafter also referred to as the inner conductor) used for signals, an insulator 24 surrounding it, a shield 25 (hereinafter also referred to as the outer conductor) arranged so as to cover the insulator 24, and an outer coating 26 that covers the whole (Fig. 3).

[0027] The entire length of the coaxial cable 22 is about 8 cm, and only the core wire 23 protrudes about 3 to 5 cm toward the brush part 30. This protruding portion becomes part of the brush part 30. On the terminal portion 10 side of the coaxial cable 22, the core wire 23 and the shield 25 are drawn out and crimped together at the crimping portion 11. The shield 25 on the brush portion 30 side is trimmed so as not to come into contact with the core wire 23 and the brush portion 30, and does not come into contact with other electrical components. The noise component enters the coaxial cable 22 from the terminal portion 10 side. With the shield 25 of the coaxial cable 22 as a reference, a part of the noise component enters the core wire 23 as a signal. The coaxial cable 22 can transmit high-frequency components with reduced attenuation due to the relationship between the core 23 and the shield 25.

[0028] Next, as shown in FIG. 4( b ), the core wire 23 which is the inner conductor and the group of linear conductors 44 are crimped with a ring sleeve 31 . The linear conductor group 44 is an assembly of the linear conductors 40, one of which is a stranded portion 45 formed by stranding the linear conductors 40, and the other of which is unstretched and radially arranged. The linear conductor group 44 is made up of a first linear conductor 41 and a second linear conductor 42 . The first linear conductor 41 and the second linear conductor 42 are bundled together, and one end of the wire is twisted to form a twisted wire section 45. By forming the twisted wire section, the wires are easily bundled together, and the amount of contact with the core wire 23 can be increased.

[0029] Alternatively, a cable made of wire that satisfies the requirements, such as the inner core of a high-grade speaker cable, may be used. By removing the coating from the inner core and using one end as the stranded wire portion 45 as it is and unraveling the other end, a radial shape can be obtained. Four linear conductor groups 44 are arranged around core wire 23, covered with ring sleeve 31, and ring sleeve 31 is crimped to integrate core wire 23 and linear conductor group 44 (FIG. 3). At this time, by aligning the tip of the core wire 23 with the tip of the linear conductor group 44, the discharge effect of the core wire 23 can be improved.

[0030] 4(c), the intermediate portion 20 is covered with a heat shrink tube 51, which is an insulating portion 50. By covering the intermediate portion 20 with the insulating portion 50, it is possible to prevent unnecessary radiation from the intermediate portion 20 to the frame ground 62 and the virtual earth 70 close to the terminal portion 10. To reduce gaps at the ends of the insulating part 50, a heat shrink tube 51 is used as the insulating part 50. By using the heat shrink tube 51 and applying heat, the heat shrink tube 51 adheres closely to the terminal part 10, the coaxial cable 22, the ring sleeve 31, etc. Furthermore, to eliminate gaps, hot bond 52 is poured into the gaps (FIG. 3). An example of the completed discharger 1 is shown in FIG. With this structure, high frequency noise components can be efficiently radiated.

[0031] Another embodiment will be described with reference to Fig. 5. Portions similar to those of the first embodiment will be omitted. Fig. 5 shows the structure of the second embodiment, where (a) is a side view, (b) is a perspective view, and (c) is an exploded view. Although the first embodiment can reduce high-frequency noise components on the ground, forming many wires into a radial shape can take time. In addition, the performance may be affected by the radial shape, which raises concerns about the uniformity of quality. Therefore, a structure that can simplify the manufacturing process and achieve uniform performance has been required.

[0032] The present embodiment will be described with reference to FIG. The discharger 1 is composed of a terminal portion 10, an intermediate portion 20, and a discharge portion . The terminal portion 10 has almost the same function as in Example 1. The crimping portion 11 and the shaft 27 of the intermediate portion 20 are electrically connected by soldering. This is because the shaft 27 has a relatively high rigidity and can be fixed more stably by soldering than by simple crimping.

[0033] The intermediate portion 20 is a portion that connects the terminal portion 10 and the emission portion 46 . The middle section consists of the shaft 27 , a Teflon tube 53 and a heat shrink tube 51 . The terminal portion 10 and the discharge portion 46 are electrically connected by the shaft 27, and are surrounded by an insulating portion 50. The length of the shaft 27 is, for example, about 4 cm. If it is too long, the resistance value of the shaft becomes an issue, and if it is too short, the discharge portion 46 becomes too close to the earth, making it difficult to discharge. The length is determined by measurement and consideration. Copper, which has a low resistance value, is preferably used as the material for the shaft 27. By using oxygen-free copper, the resistance value can be further reduced. Moreover, the shaft 27 may be hollow. By making it hollow, the surface area of ​​the entire discharge device can be preferably increased. The conductor of the intermediate portion 20 is the chassis 27, which is covered with a Teflon (registered trademark) tube 53. The Teflon (registered trademark) tube 53 is strong and can reinforce the shaft 27. Furthermore, by covering it with a heat-shrunk tube 51, the vicinity of the boundary with the terminal 10 and the boundary with the emission portion 46 can be covered with an insulator, which is preferable. Similarly to the first embodiment, both ends of the heat-shrinkable tube 51 may be sealed with hot glue 52 .

[0034] The emitter 46 is an important element in this embodiment. The emitter 46 discharges electricity by projections extending radially from a metallic disk-shaped conductor. The emission section 46 is mainly composed of a first disk-shaped conductor 48 and a second disk-shaped conductor 49. The first disk-shaped conductor 48 is, for example, about 0.1 mm thick and 22 mm in diameter. It has many protrusions 47 on its periphery and is gear-shaped. In other words, it has radial protrusions 47. The number of protrusions 47 is, for example, about 50 to 80. The more protrusions 47, the better, but the length of the protrusions 47 themselves is also important, so the number and size of the protrusions 47 are determined by experiments, measurements, etc. The second disk-shaped conductor 49 is disk-shaped with a number of holes. Its dimensions are, for example, about 0.4 mm in thickness and 22 mm in diameter. It has many smaller protrusions 47 than the first disk-shaped conductor 48 on its periphery and flat surface. By having a protrusion different from that of the first disk-shaped conductor 48, it is possible to emit noise of a different frequency from that of the first disk-shaped conductor 48. The three-piece structure in which the second disk-shaped conductor 49 is sandwiched between the two first disk-shaped conductors 48 is preferable because it allows many noise components to be emitted from the protrusion 47 of the first disk-shaped conductor 48 and allows the protrusion 47 of the second disk-shaped conductor 49 to emit noise components different from those emitted by the protrusion 47 of the first disk-shaped conductor 48.

[0035] A first disk-shaped conductor 48, a second disk-shaped conductor 49, and the first disk-shaped conductor 48 are attached in this order to the tip of the chassis 27. A spacer 54, which is an insulator, is disposed between each of the disk-shaped conductors. By disposing the spacers 54, the disk-shaped conductors are connected only at their central portions, and the disk-shaped conductors are disposed at intervals equal to the thickness of the spacers 54. The thickness of the spacer 54 is about 0.5 mm to 2 mm. If it is thin, a ring washer shape is possible, and if it is thick, a nut shape is appropriate. Since multiple disk-shaped conductors are spaced apart, it has the effect of expanding the surface area of ​​the ground. Furthermore, since the disk-shaped conductor has multiple protrusions 47, the noise components carried on the ground can be radiated from a large number of protrusions 47. Also, by increasing the number of disk-shaped conductors, the radiation can be increased even more.

[0036] The assembly process of this embodiment will now be described. First, the chassis 27 is covered with a Teflon (registered trademark) tube 53, and the chassis 27 and the crimping portion 11 of the terminal portion 10 are fixed by soldering. Next, the first disk-shaped conductor 48, the spacer 54, the second disk-shaped conductor 49, the spacer 54, and the first disk-shaped conductor 48 are assembled in this order, and attached to the end of the chassis 27 with the screws 55. The length of the screws 55 is appropriately changed depending on the distance of the gap between the first disk-shaped conductor 48 and the second disk-shaped conductor 49. Finally, the heat shrink tube 51 is placed over the middle portion 20 to complete the assembly. In addition, both ends of the heat shrink tube 51 may be covered with hot glue 52 to increase the sealing and insulation of the middle portion 20 .

[0037] As the product is thus made up of only parts that are easy to shape, it is easy to assemble and variations during production can be reduced, making it possible to maintain uniform performance for each product.

[0038] We evaluated the sound quality with and without a discharger (Table 1). The sound quality was evaluated using a main tone evaluation, a reverberation evaluation, and a three-dimensional effect evaluation, and a comparison was made between the presence or absence of a discharger 1 connected to the discharger side connection part 72 of the virtual earth 70, with the virtual earth 70 connected to the frame ground terminal of the amplifier. As a sound quality evaluation item, the main tone was divided into three categories: low, mid, and high. Sound quality evaluation was conducted by six people aged between 34 and 64 years old. The evaluation was done on a four-point scale: S: very good, A: good, B: unchanged, C: bad. The percentage of people who felt S: very good was compiled as the evaluation.

[0039] [Table 1] ◎: More than 70% of people felt that the sound quality had improved significantly 〇: The percentage of people who felt that the sound quality had improved significantly was less than 70% and more than 50%. △: The percentage of people who felt that the sound quality had improved significantly was less than 50% and more than 40%. ×: Less than 40% of people felt that the sound quality had improved significantly

[0040] As shown in Table 1, the use of a discharger creates a sense of fullness in the bass tones. Furthermore, the evaluation clearly showed that the contours of the mid- and high-range sounds were clearly defined, and that both the reverberation and three-dimensionality were improved.

[0041] Thus, according to the discharger of the present invention, by connecting the discharger to ground, a part of the noise in the audio equipment is eliminated, thereby improving the sound quality.

[0042] Similarly, static electricity generated by audio equipment can also be reduced by discharging it. [Industrial Applicability]

[0043] The discharger according to the present invention improves the sound quality performance of audio equipment and can be attached to any audio equipment, whether existing or new, to demonstrate its effectiveness. Therefore, it is believed that the discharger according to the present invention has great industrial applicability. [Explanation of symbols]

[0044] 1 discharger 10 Terminal section 11 Crimping section 20 Middle section 21 Electric wire 22 Coaxial Cable 23 Core wire (inner conductor) 24 Insulators 25 Shield (outer conductor) 26 External Coverage 27 Shaft 30 Brush section 31 Ring Sleeve 40 Linear conductor 41 First linear conductor 42 Second linear conductor 43 Radial section 44 Linear conductor group 45 Twisted wire section 46 Emission part 47 Protrusion 48 First disc-shaped conductor 49 Second disc conductor 50 Insulation 51 Heat shrink tube 52 Hot Bond 53 Teflon tube 54 Spacer 55 Screw 60 Audio Equipment 61 Chassis 62 Frame ground 70 Virtual Earth 71 Ground connection 72 Discharger side connection part 73 Layer section

Claims

1. A discharger that is attached to the ground of an electric circuit including an audio circuit, On one side, it has a terminal part that is connected to ground, On the other hand, it has an emission part made of a plurality of conductors, the terminal portion and the emission portion are electrically connected via an intermediate portion, The intermediate portion is covered with an insulator, A discharge vessel, wherein the emission portion has radially extending protrusions.

2. 2. The discharge device according to claim 1, wherein the emission section is composed of a plurality of disk-shaped conductors which are connected to each other at their centers and which are spaced at regular intervals by spacers.

3. 3. The discharge vessel according to claim 2, wherein the intermediate portion is made of a hollow conductor.

4. 3. The discharge device according to claim 2, wherein the disk-shaped conductor is made up of three or more pieces, and at least two pieces at both ends have the gear-shaped protrusion.

5. the discharge portion is a brush portion in which one end of a bundle of a plurality of linear conductors is gathered and connected to the intermediate portion, The other end of the bundle is the protrusion, which is radially disposed relative to the one end of the bundle.

2. The discharge vessel of claim 1, wherein the discharge vessel is flared.

6. The linear conductors are made up of a plurality of sizes, 6. The discharge device according to claim 5, characterized in that the material or coating state differs for each thickness.

7. The linear conductor includes a first linear conductor made of a high-purity oxygen-free copper wire without a coating; 7. The discharge vessel according to claim 6, further comprising a second linear conductor which is thinner than the first conductor and which is made of a silver-coated high-purity oxygen-free copper wire.

8. the intermediate portion is formed of a coaxial cable, and an inner conductor and an outer conductor of the coaxial cable are connected to the terminal portion; The inner conductor of the coaxial cable is connected to the brush portion, the brush portion comprises the internal conductor and a group of linear conductors, one of which is twisted and the other of which is radial; The linear conductor groups are multiple, 6. The discharge vessel according to claim 5, wherein the inner conductor and the linear conductor group are crimped with a ring sleeve.

9. 9. The discharger according to claim 1, wherein a virtual earth is connected between the ground and the discharger.

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