JP7564653B2 - Discharge Device - Google Patents

Description

The present invention relates to a discharge device.

The discharge device described in Patent Document 1 includes a casing, multiple discharge electrode needles, a high-voltage substrate, and a filler. The casing houses the multiple discharge electrode needles, the high-voltage substrate, and the filler. A high voltage is applied to the multiple discharge electrode needles, which generate ions. The high-voltage substrate is connected to the multiple discharge electrode needles. The high-voltage substrate is connected to an external high-voltage power supply. The filler is an insulating resin.

JP 2019-102295 A

However, in the discharge device described in Patent Document 1, under harsh conditions such as high humidity and condensation, water droplets may adhere to the support parts, such as the discharge electrode needle on the filler, and moisture may penetrate between the support parts and the filler. Water droplets adhering to the support parts may corrode the discharge electrode needle.

The present invention was made in consideration of the above problems, and aims to provide a discharge device that can prevent the support part from corroding.

According to one aspect of the present invention, a discharge device includes a discharge member, a support portion, a covering member, and an insulating member. The discharge member discharges when a voltage is applied to the discharge member. The support portion supports the discharge member. The covering member covers the support portion. The insulating member is disposed around the support portion covered by the covering member. The support portion has a flat plate shape and penetrates the insulating member. The covering member covers at least the portion of the support portion that protrudes outside the insulating member and the portion located inside the insulating member.

The discharge device of the present invention can prevent the support part from corroding.

FIG. 1 is a diagram showing a discharge device according to an embodiment of the present invention. 2 is a cross-sectional view of the discharge device shown in FIG. 1 along II-II. FIG. 3 is an enlarged view of the electrode shown in FIG. 2 . FIG. 4 is a view of the electrode of FIG. 3 from a different angle. FIG. 4 is an enlarged view showing an electrode of a discharge device according to a first modified example of the present embodiment. 13 is an enlarged view showing an electrode of a discharge device according to a second modified example of the present embodiment. FIG. 13 is an enlarged view showing an electrode of a discharge device according to a third modified example of the present embodiment. FIG. FIG. 8 is a view of the electrode of FIG. 7 from a different angle. 13 is an enlarged view showing an electrode of a discharge device according to a fourth modified example of the present embodiment. FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference symbols and the description will not be repeated. In the embodiment of the present invention, the X-axis, Y-axis, and Z-axis are mutually perpendicular, the X-axis and Y-axis are parallel to the horizontal plane, and the Z-axis is parallel to the vertical line.

A discharge device 100 according to a first embodiment of the present invention will be described with reference to Figs. 1 to 4. First, the discharge device 100 according to the first embodiment will be described with reference to Fig. 1. Fig. 1 is a diagram showing the discharge device 100 according to the first embodiment. The discharge device 100 generates active species by discharging. The active species include ions.

The discharge device 100 has a plurality of electrodes 19, a housing section 1, and a cover section 2. The plurality of electrodes 19 discharge when a voltage is applied. The plurality of electrodes 19 is, for example, two electrodes 19. That is, the plurality of electrodes 19 is, for example, a pair of electrodes 19. A portion of each of the pair of electrodes 19 penetrates the cover section 2.

The housing 1 houses a part of the pair of electrodes 19. The housing 1 is a box-shaped housing. The housing 1 has insulating properties. The housing 1 is formed of, for example, resin.

The cover 2 covers the portion of the housing 1 where the pair of electrodes 19 are arranged. The cover 2 has insulating properties. The cover 2 is made of, for example, resin.

Next, the discharge device 100 will be described in detail with reference to FIG. 2. FIG. 2 is a diagram showing a cross section of the discharge device 100 shown in FIG. 1 taken along line II-II. As shown in FIG. 2, the discharge device 100 further includes a plurality of induction electrodes 132, a first substrate 51, a second substrate 52, a third substrate 53, an electronic component 7, a transformer 8, and an insulating member 9.

As shown in FIG. 2, the storage unit 1 stores a first board 51, a second board 52, a third board 53, an electronic component 7, a transformer 8, and an insulating member 9. The storage unit 1 is box-shaped with an opening 13. The storage unit 1 has a side wall portion 11 and a bottom wall portion 12.

The bottom wall portion 12 supports the side wall portion 11. The transformer 8 and electronic components 7 are arranged on the bottom wall portion 12. The side wall portion 11 surrounds the bottom wall portion 12. The side wall portion 11 extends from the bottom wall portion 12 toward the opening 13.

The multiple induction electrodes 132 form an electric field between the induction electrodes 132 and the electrode 19. The multiple induction electrodes 132 are, for example, two induction electrodes 132. That is, the multiple induction electrodes 132 are, for example, a pair of induction electrodes 132. Each of the pair of induction electrodes 132 is disposed around the electrode 19. The induction electrodes 132 are annular or approximately annular. Being approximately annular indicates that the induction electrodes 132 are partially interrupted in the circumferential direction. The pair of induction electrodes 132 are connected to the first substrate 51.

The pair of electrodes 19 are, for example, brush-shaped electrodes. The pair of electrodes 19 are connected to the second substrate 52. When a high voltage is applied to the pair of electrodes 19, they generate a corona. In other words, each of the pair of electrodes 19 discharges and generates ions.

For example, one of the pair of electrodes 19 emits positive ions when discharged. The positive ions are cluster ions (H ⁺ (H ₂ O) _m (m is any positive number equal to or greater than zero)) in which a plurality of water molecules are clustered around a hydrogen ion (H ⁺ ). Furthermore, for example, the other of the pair of electrodes 19 emits negative ions when discharged. The negative ions are cluster ions (O ₂ - (H ₂ O) _n (n is any positive number equal to or greater than zero)) in which a plurality of water molecules are clustered around an oxygen ion (O ₂ - ).

When emitting positive ions and negative ions, the greater the distance between the electrode 19 that emits positive ions and the electrode 19 that emits negative ions, the greater the amount of ions emitted from each electrode 19.

The released positive and negative ions surround, for example, mold spores floating in the air, and cause a chemical reaction on the surface of the mold spores. The chemical reaction produces active species, hydroxyl radicals (.OH). The action of the hydroxyl radicals (.OH) then removes the mold spores.

A pair of induction electrodes 132 are arranged on the first board 51. The first board 51 is electrically connected to the pair of induction electrodes 132. The first board 51 is a so-called printed circuit board. The first board 51 is arranged closer to the opening 13 than the second board 52. The first board 51 is connected to the transformer 8 by lead wires. The first board 51 is connected to the third board 53 via the transformer 8.

A pair of electrodes 19 is arranged on the second board 52. The second board 52 is electrically connected to the pair of electrodes 19. The second board 52 is a so-called printed circuit board. The second board 52 is arranged closer to the opening 13 than the third board 53. The second board 52 is connected to the transformer 8 by lead wires. The second board 52 is connected to the third board 53 via the transformer 8.

A circuit is formed on the third substrate 53. Specifically, a circuit is formed on the third substrate 53 for electrically connecting with the first substrate 51, the second substrate 52, the transformer 8, and the electronic components 7. More specifically, the third substrate 53 is electrically connected to the transformer 8 and the electronic components 7 by a pattern. Specifically, the third substrate 53 is connected to the terminals of the transformer 8. The third substrate 53 is disposed between the electronic components 7 and the second substrate 52.

The electronic components 7 include, for example, a power supply terminal, a diode, a resistive element, a transistor, a capacitor, etc. The power supply terminal is connected to an external power supply via a pattern.

The transformer 8 boosts the voltage generated by the electronic component 7 and applies the generated high voltage to a pair of electrodes 19.

The insulating member 9 has insulating properties. The insulating member 9 is, for example, a urethane resin or an epoxy resin. The insulating member 9 hardens, for example, over time. Also, for example, the insulating member 9 hardens due to temperature (heat) or light (ultraviolet rays).

The cover part 2 covers the opening 13 of the storage part 1. The cover part 2 includes a main body part 21 and a pair of openings 20. A pair of electrodes 19 are inserted into each of the pair of openings 20.

Next, the discharge device 100 will be described in more detail with reference to Figures 3 and 4. Figure 3 is an enlarged view of the electrode 19 shown in Figure 2. To facilitate understanding of the invention, Figures 3 and 4 show the electrode 19, the second substrate 52, and the insulating member 9. Figure 4 is a view of the electrode 19 in Figure 3 from a different angle.

As shown in Figures 3 and 4, the electrode 19 includes a support portion 191 and a discharge member 192.

The support portion 191 supports the discharge member 192. A voltage is applied to the support portion 191 together with the discharge member 192. The support portion 191 has a main body portion 194. The main body portion 194 penetrates the second substrate 52. Furthermore, the main body portion 194 penetrates the insulating member 9.

As shown in FIG. 4, the main body 194 has a flat plate shape. The main body 194 has a pair of first surfaces 191A facing each other, a pair of second surfaces 191B facing each other, a first support end 191C, and a second support end 191D. The pair of second surfaces 191B are disposed between one first surface 191A and the other first surface 191A. The width of the first surface 191A is greater than the width of the second surface 191B. In other words, the area of the first surface 191A is greater than the area of the second surface 191B. In other words, the main body 194 is a thin plate.

The first support end 191C is the end on the side of the first direction D1. The first direction D1 indicates the direction from the second substrate 52 toward the discharge member 192. The first support end 191C penetrates the insulating member 9 and protrudes outside the insulating member 9. The first support end 191C corresponds to the portion CA that protrudes outside the insulating member 9.

The second support end 191D is the end on the side of the second direction D2. The second support end 191D is connected to the second substrate 52. The second direction D2 indicates the direction from the discharge member 192 toward the second substrate 52. A part of the second support end 191D penetrates the second substrate 52. Another part of the second support end 191D is located inside the insulating member 9. The other part of the second support end 191D corresponds to the portion CB located inside the insulating member 9.

The discharge member 192 discharges when a voltage is applied.

The discharge device 100 further includes a covering member 201. The covering member 201 covers the support portion 191. The covering member 201 is a resin that shrinks when heated. The covering member 201 has a cylindrical shape. The covering member 201 is, for example, a heat shrink tube. Before shrinking, the covering member 201 has a cylindrical shape that is larger than the support portion 191. After shrinking, the covering member 201 has a cylindrical shape that is smaller than the support portion 191. Therefore, the covering member 201 after shrinking can cover the support portion 191.

Specifically, the covering member 201 before contraction is inserted into the supporting portion 191. The covering member 201 is then heated. The covering member 201 then contracts until it comes into close contact with the surfaces of the pair of first faces 191A and the surfaces of the pair of second faces 191B. In other words, the covering member 201 covers the supporting portion 191 while reducing the gap between the covering member 201 and the supporting portion 191.

The covering member 201 covers the support portion 191, thereby reducing bending of the support portion 191 due to an external force. For example, the covering member 201 reduces bending of the support portion 191 in the third direction D3 shown in FIG. 3. The third direction D3 indicates a direction along the direction from one first surface 191A to the other first surface 191A. As shown in FIG. 3, the thickness of the support portion 191 in the third direction D3 is thinner than the thickness of the support portion 191 in the fourth direction D4 shown in FIG. 4. The fourth direction D4 indicates a direction along the direction from one second surface 191B to the other second surface 191B. The fourth direction D4 intersects with the third direction D3. In other words, the support portion 191 is easily bent in the third direction D3 and is not easily bent in the fourth direction D4. Therefore, the covering member 201 can reduce bending of the support portion 191 in the third direction D3. Additionally, the insulating material 9 is filled around the covering material 201.

Specifically, as shown in Figures 3 and 4, the covering member 201 covers the portion CA of the support portion 191 that protrudes outside the insulating member 9 and the portion CB that is located inside the insulating member 9. In other words, it is possible to prevent moisture from entering between the covering member 201 and the support portion 191. Therefore, it is possible to prevent water droplets from adhering to the support portion 191. As a result, it is possible to prevent the support portion 191 from corroding.

The electrode 19 will now be described in more detail with reference to Figures 3 and 4. As shown in Figures 3 and 4, the discharge member 192 is a plurality of fibers. That is, the discharge member 192 is a bundle of fibers. Each of the plurality of fibers is a conductor. The discharge member 192 is, for example, a carbon fiber. The discharge member 192 may be, for example, a metal, a conductive fiber, or a conductive resin. A portion of the plurality of fibers of the discharge member 192 expands during discharge.

The support portion 191 of the electrode 19 further includes a holding portion 193. The holding portion 193 holds the discharge member 192. The holding portion 193 extends from the support portion 191. The holding portion 193 is made of the same material as the support portion 191 and is molded integrally with the support portion 191. The holding portion 193 also bundles the multiple fibrous discharge members 192. In other words, the holding portion 193 holds the discharge members 192 so that they are brush-shaped.

The holding portion 193 has a first holding piece 193A and a second holding piece 193B. The first holding piece 193A and the second holding piece 193B hold the base end of the discharge member 192. Specifically, the first holding piece 193A and the second holding piece 193B hold the base end of the discharge member 192 by crimping deformation. The first holding piece 193A and the second holding piece 193B hold the base end of the discharge member 192, so that the discharge member 192 becomes brush-shaped.

3 and 4, the first coated end 201A of the coating member 201 indicates an end of the coating member 201 that protrudes from the surface 9S of the insulating member 9 toward the discharge member 192. Specifically, the first coated end 201A of the coating member 201 is disposed closer to the insulating member 9 than the discharge member 192 and closer to the discharge member 192 than the surface 9S of the insulating member 9. The first coated end 201A is another part of the coating member 201 that protrudes from the insulating member 9. The first coated end 201A corresponds to an example of a "first end". The second coated end 201B of the coating member 201 indicates an end of the coating member 201 that abuts against the second substrate 52. The second coated end 201B is a part of the coating member 201 that is disposed inside the insulating member 9. In other words, the coating member 201 covers the support portion 191 between the second substrate 52 and the discharge member 192. The second covered end 201B corresponds to an example of the "second end." Therefore, the support portion 191 can be covered between the second substrate 52 and the discharge member 192. As a result, the exposed portion of the support portion 191 can be reduced, and water can be further prevented from entering between the covering member 201 and the support portion 191.

Furthermore, the first coated end 201A of the coating member 201 is positioned closer to the insulating member 9 than the holding portion 193. The closer the coating member 201 is to the discharge member 192, the more likely it is to weaken the discharge of the discharge member 192. Therefore, the first coated end 201A of the coating member 201 does not cover the holding portion 193. As a result, it is possible to prevent the coating member 201 from weakening the discharge of the discharge member 192.

(Variation 1)
Next, a first modified example of the discharge device 100 of the first embodiment will be described with reference to Fig. 5. The first modified example differs from the first embodiment mainly in that the covering member 201 covers the holding portion 193. The differences between the first modified example and this embodiment will be described below.

Figure 5 is an enlarged view of the electrode 19 of the discharge device 100 of the first modified example. To facilitate understanding of the invention, Figure 5 shows the electrode 19, the second substrate 52, and the insulating member 9. As shown in Figure 5, the holding portion 193 has a first holding end 193C and a second holding end 193D.

The first holding end 193C is the end on the side of the discharge member 192. In other words, the first holding end 193C is the end on the side of the first direction D1.

The second holding end 193D is the end on the insulating member 9 side. In other words, the second holding end 193D is the end on the second direction D2 side. The second holding end 193D is continuous with the main body portion 194 of the support portion 191.

As shown in FIG. 5, the covering member 201 of the first modified example covers the range of the support portion 191 from the second substrate 52 to the discharge member 192. Specifically, the first covered end 201A of the covering member 201 is disposed at the position of the first holding end 193C. Furthermore, the second covered end 201B of the covering member 201 abuts against the second substrate 52. Therefore, the entire support portion 191 is covered by the covering member 201. As a result, the exposed portion of the support portion 191 is reduced, and adhesion of moisture to the support portion 191 can be further suppressed.

(Variation 2)
Next, a second modified example of the discharge device 100 of the first embodiment will be described with reference to Fig. 6. The second modified example differs from the first embodiment mainly in that it has a filling member 202 and a lid portion 203. The differences between the second modified example and this embodiment will be described below.

Figure 6 is an enlarged view of the electrode 19 of the discharge device 100 according to the second modified example. To facilitate understanding of the invention, Figure 6 shows the electrode 19, the second substrate 52, and the insulating member 9.

As shown in FIG. 6, the discharge device 100 of this embodiment further includes a lid portion 203 and a filling member 202.

The lid portion 203 covers the first covered end portion 201A of the covering member 201. Therefore, the first covered end portion 201A of the covering member 201 is closed by the lid portion 203. As a result, it is possible to further prevent moisture from entering the inside of the covering member 201 from the first covered end portion 201A.

The lid portion 203 does not have to cover the outer edge of the first covered end portion 201A. The lid portion 203 covers at least the boundary portion between the support portion 191 and the first covered end portion 201A. By covering at least the boundary portion between the support portion 191 and the first covered end portion 201A, it is possible to prevent moisture from entering the inside of the covering member 201.

The lid portion 203 is made of resin and has thermoplastic properties. In other words, the shape of the lid portion 203 changes when heated. Therefore, by placing the lid portion 203 on the first covered end portion 201A of the covering member 201 and heating the lid portion 203, the lid portion 203 penetrates into the gap between the covering member 201 and the support portion 191. Therefore, the lid portion 203 reduces the gap between the covering member 201 and the support portion 191. As a result, it is possible to further suppress the penetration of moisture into the gap between the covering member 201 and the support portion 191.

The filling member 202 is disposed between the covering member 201 and the support portion 191. The filling member 202 fills the gap between the covering member 201 and the support portion 191. Therefore, the gap between the covering member 201 and the support portion 191 is reduced. As a result, it is possible to prevent moisture from entering the gap between the covering member 201 and the support portion 191, while preventing the covering member 201 from falling off the support portion 191.

The filling member 202 is an adhesive. The filling member 202 is applied to the inner surface of the covering member 201. The filling member 202 is a resin and has thermoplastic properties. In other words, the form of the filling member 202 changes depending on the temperature. Specifically, the filling member 202 becomes liquid when heated. Also, the filling member 202 becomes solid when cooled. Also, as shown in FIG. 6, three types of resin are arranged on the outside of the support portion 191. Specifically, the filling member 202, the covering member 201, and the insulating member 9 are arranged in that order on the outside of the support portion 191.

The melting point of the filling member 202 is lower than the melting point of the covering member 201. Specifically, the filling member 202 melts at the temperature at which the covering member 201 contracts. That is, the filling member 202 melts when the covering member 201 is heated, and the filling member 202 penetrates into the gap between the covering member 201 and the support portion 191. The filling member 202 then cools and solidifies, bonding the covering member 201 and the support portion 191 together. Therefore, the covering member 201 and the support portion 191 can be bonded together while reducing the gap between the covering member 201 and the support portion 191 at the same time as the covering member 201 is heated. As a result, the effort required to bond the covering member 201 and the support portion 191 can be reduced.

(Variation 3)
Next, a third modified example of the discharge device 100 of the first embodiment will be described with reference to Fig. 7 and Fig. 8. The third modified example differs from the first embodiment mainly in the shape of the discharge member 192. The following describes the differences between the third modified example and this embodiment.

Figure 7 is an enlarged view of the electrode 19 of the discharge device 100 according to the third modified example. To facilitate understanding of the invention, Figure 8 shows the electrode 19, the second substrate 52, and the insulating member 9. Figure 8 shows the electrode 19 of Figure 7 from a different angle.

As shown in FIG. 8, the discharge member 192 is a flat plate with a pointed tip. In other words, the discharge member 192 is a triangular thin plate. The discharge member 192 is an electrical conductor. The discharge member 192 extends from the support portion 191. The discharge member 192 is made of the same material as the support portion 191 and is molded integrally with the support portion 191.

7 and 8, the first covered end 201A of the covering member 201 is disposed closer to the insulating member 9 than the discharge member 192, and closer to the discharge member 192 than the surface 9S of the insulating member 9. The second covered end 201B of the covering member 201 abuts against the second substrate 52. That is, the covering member 201 covers the support portion 191 between the second substrate 52 and the discharge member 192. Therefore, the support portion 191 can be covered between the second substrate 52 and the discharge member 192. As a result, the exposed portion of the support portion 191 can be reduced, and water can be further prevented from entering between the covering member 201 and the support portion 191.

More specifically, the first covered end 201A of the covering member 201 of the third modified example is disposed adjacent to the boundary between the support portion 191 and the discharge member 192. Furthermore, the second covered end 201B of the covering member 201 abuts against the second substrate 52. Therefore, the entire supporting portion 191 is covered by the covering member 201. As a result, the exposed portion of the supporting portion 191 is reduced, and the adhesion of moisture to the supporting portion 191 can be further suppressed.

(Variation 4)
Next, a fourth modified example of the discharge device 100 of the first embodiment will be described with reference to Fig. 9. The fourth modified example differs from the first embodiment mainly in the shape of the electrode 19. The following describes the differences between the fourth modified example and this embodiment.

Figure 9 is an enlarged view of the electrode 19 of the discharge device 100 according to the fourth modified example. To facilitate understanding of the invention, Figure 9 shows the electrode 19, the second substrate 52, and the insulating member 9.

As shown in FIG. 9, the support portion 191 has a cylindrical shape. The body portion 194 of the support portion 191 has a first support end portion 191C and a second support end portion 191D.

The first support end 191C is the end on the side of the first direction D1. The first support end 191C penetrates the insulating member 9 and protrudes to the outside of the insulating member 9. The second support end 191D is the end on the side of the second direction D2. The second support end 191D is connected to the second substrate 52. A portion of the second support end 191D penetrates the second substrate 52. The other portion of the second support end 191D is located inside the insulating member 9.

The discharge member 192 is needle-shaped with a sharp tip. The discharge member 192 is an electrical conductor. The discharge member 192 extends from the support portion 191. The discharge member 192 is made of the same material as the support portion 191 and is molded integrally with the support portion 191.

9, the first covered end 201A of the covering member 201 is disposed closer to the insulating member 9 than the discharge member 192, and closer to the discharge member 192 than the surface 9S of the insulating member 9. The second covered end 201B of the covering member 201 abuts against the second substrate 52. That is, the covering member 201 covers the support portion 191 between the second substrate 52 and the discharge member 192. Therefore, the support portion 191 can be covered between the second substrate 52 and the discharge member 192. As a result, the exposed portion of the support portion 191 can be reduced, and water can be further prevented from entering between the covering member 201 and the support portion 191.

More specifically, the first covered end 201A of the covering member 201 of the fourth modified example is disposed adjacent to the boundary between the support portion 191 and the discharge member 192. Furthermore, the second covered end 201B of the covering member 201 abuts the second substrate 52. Therefore, the entire supporting portion 191 is covered by the covering member 201. As a result, the exposed portion of the supporting portion 191 is reduced, and the adhesion of moisture to the supporting portion 191 can be further suppressed.

The above describes the embodiments of the present invention with reference to the drawings. However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present invention. In addition, various inventions can be formed by appropriately combining multiple components disclosed in each of the above embodiments. For example, some components may be deleted from all components shown in the embodiments. Furthermore, components from different embodiments may be appropriately combined. The drawings are mainly shown schematically for ease of understanding, and the thickness, length, number, spacing, etc. of each component shown in the drawings differ from the actual ones due to the convenience of drawing. In addition, the speed, material, shape, dimensions, etc. of each component shown in the above embodiments are only examples and are not particularly limited, and various changes are possible within a range that does not substantially deviate from the configuration of the present invention.

(1) The discharge device 100 described in this embodiment may be installed in electrical appliances such as air conditioners, dehumidifiers, humidifiers, air purifiers, refrigerators, gas fan heaters, kerosene fan heaters, electric fan heaters, washer-dryers, vacuum cleaners, sterilizers, and microwave ovens.

The present invention provides a discharge device and has industrial applicability.

9: Insulating member 9S: Surface 52: Second substrate (substrate)
100: Discharge device 191: Support portion 192: Discharge member 193: Hold portion 201: Covering member 201A: First covered end portion (first end portion)
201B: Second covered end (second end)
202: Complementary member 203: Lid part

Claims (7)

A discharge member which discharges electricity by applying a voltage and is a bundle of fibers;
A support portion having a flat plate shape and supporting the discharge member;
A covering member that covers the support portion;
an insulating member into which a portion of the covering member is disposed;
Equipped with
Another part of the covering member protrudes from the insulating member,
the support portion has a main body portion, a part of which protrudes from the insulating member, and a holding portion located at a tip of the main body portion and holding the discharge member,
The holding portion has a dimension larger than that of the main body portion in a direction intersecting a protruding direction of the main body portion,
A discharge device, wherein the covering member covers the main body portion including the portion of the support portion that protrudes outside the insulating member and the portion that is located inside the insulating member, but does not cover the holding portion. The discharge device according to claim 1, wherein the covering member covers a portion of the discharge member that is located closer to the insulating member than the holding portion. Further comprising a substrate connected to the support portion,
the covering member has a first end on the discharge member side and a second end on the substrate side;
the first end portion indicates an end portion of the covering member that protrudes from a surface of the insulating member toward the discharge member,
The discharge device according to claim 1 or 2 , wherein the second end portion indicates an end portion of the covering member that abuts against the substrate. The discharge device according to claim 3 , wherein the first end is disposed closer to the insulating member than the holding portion. The discharge device according to claim 4 , further comprising a lid portion covering the first end portion. The discharge device according to claim 1 , further comprising a filling member disposed between the covering member and the support portion, filling a gap between the covering member and the support portion. The discharge device according to claim 6 , wherein the melting point of the filling member is lower than the melting point of the covering member.

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