Discharge lamp and processing device

Abstract

To provide a discharge lamp capable of suppressing any one of a light emitting pipe and a protection pipe from being damaged when applying a vibration to the discharge lamp, and provide a processing device.SOLUTION: A discharge lamp according to an embodiment, includes: a protection pipe that has a cylinder shape, and is extended to a first direction; a light emission pipe in the protection pipe; a first electrode that is provided to a first end part of the light emission pipe; a second electrode that is provided to a second end part that is opposite thereto; first and second holders that hold the first and second end parts of the light emission pipe in an inner part of the protection pipe; first and second wirings that are electrically connected to the first and second electrodes; a holding material that is extended to a first direction between the first and second holders, and holds the second wiring; a support part that is provided to between the first and second holders, and supports the holding part. The support part includes: a holding part to which the holding material is provided; and an arm that surrounds an outer wall of the light emission pipe to a second direction that is orthogonal to the first direction, and is bonded to the holding part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE The present invention relates to a discharge lamp and a processing device. [Background technology]

[0002] There are discharge lamps that irradiate light such as ultraviolet light. Such discharge lamps may be used in treatment devices that cause chemical reactions such as polymerization reactions, for example. In this case, the discharge lamp is immersed in the liquid to be treated that is stored in a treatment tank. For this reason, the discharge lamp has a double-tube structure that includes, for example, an arc tube and a protective tube. In this case, the arc tube that generates light is provided inside the protective tube. Therefore, the protective tube can prevent the liquid from reaching the arc tube.

[0003] Moreover, electrodes are provided on both ends of the light emitting tube. Since the discharge lamp is immersed in the liquid, it is necessary to supply power to the pair of electrodes from the end of the discharge lamp located outside the treatment tank. For this reason, wiring for supplying power to the electrodes provided on the end of the light emitting tube located inside the treatment tank is provided between the inner wall of the protective tube and the outer wall of the light emitting tube. Furthermore, a holding material for holding the wiring is provided between the inner wall of the protective tube and the outer wall of the light emitting tube. The wiring and holding material extend in the axial direction of the protective tube (light emitting tube).

[0004] Here, when the discharge lamp is transported or when the discharge lamp is attached to the treatment tank, vibrations may be applied to the discharge lamp. Vibrations may also be applied to the discharge lamp via the treatment tank. When vibrations are applied to the discharge lamp, the holding material vibrates and may collide with at least one of the arc tube and the protective tube. In this case, the light-emitting length of the discharge lamp provided in the treatment device becomes longer, and therefore the length of the holding material becomes longer. When the length of the holding material becomes longer, the amplitude of the holding material becomes larger, and therefore the holding material becomes more likely to collide with the arc tube and the protective tube.

[0005] In this case, the holding material is made of quartz glass or the like and has a large mass, so the speed at which the holding material collides with the arc tube and the protective tube increases, which may result in damage to at least one of the arc tube and the protective tube. Therefore, there has been a demand for the development of a technique that can prevent at least one of the arc tube and the protective tube from being damaged when vibration is applied to the discharge lamp. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2002-110101 A Summary of the Invention [Problem to be solved by the invention]

[0007] The problem that the present invention aims to solve is to provide a discharge lamp and a processing device that can prevent damage to at least one of the light-emitting tube and the protective tube when vibration is applied to the discharge lamp. [Means for solving the problem]

[0008] The discharge lamp according to the embodiment comprises: a protective tube having a cylindrical shape and extending in a first direction; an arc tube provided inside the protective tube and extending in the first direction; a first electrode provided at a first end of the arc tube; a second electrode provided at a second end of the arc tube opposite the first end; a first holder provided inside the protective tube and holding the first end of the arc tube; a second holder provided inside the protective tube and holding the second end of the arc tube; a first wiring provided inside the protective tube and electrically connected to the first electrode; a second wiring provided inside the protective tube and electrically connected to the second electrode; a holding material extending in the first direction between the first holder and the second holder inside the protective tube and holding the second wiring; and at least one support portion provided inside the protective tube between the first holder and the second holder and supporting the holding material. The support portion has a cylindrical shape and includes a holding portion on which the holding material is provided, and an arm that surrounds the outer wall of the light-emitting tube in a second direction perpendicular to the first direction and is joined to the holding portion. Effect of the Invention

[0009] According to an embodiment of the present invention, it is possible to provide a discharge lamp and a processing device that can prevent at least one of the arc tube and the protective tube from being damaged when vibration is applied to the discharge lamp. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic partial cross-sectional view illustrating a discharge lamp according to an embodiment of the present invention. [Diagram 2] 2 is a schematic cross-sectional view of a support portion in the direction of line AA in FIG. 1. [Diagram 3] 2 is a schematic diagram of a support part in FIG. 1 taken along line BB. [Figure 4] 13 is a table illustrating the effect of the support portion. [Diagram 5] 1 is a schematic diagram illustrating a processing apparatus provided with a discharge lamp according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate. (Discharge lamp) In the following, as an example, a discharge lamp having a double-tube structure including an arc tube having a space inside for generating light and a protective tube having a space inside for housing the arc tube will be described. However, the discharge lamp may have a multiple-tube structure. For example, the discharge lamp may have a triple-tube structure including an additional tube between the arc tube and the protective tube.

[0012] FIG. 1 is a schematic partial cross-sectional view illustrating a discharge lamp 1 according to the present embodiment. As shown in FIG. 1, a discharge lamp 1 may include, for example, a light emitting section 2, a protective tube 3, a holder 4 (corresponding to an example of a first holder and a second holder), a power supply section 5, and a support section 6.

[0013] The light-emitting unit 2 can be, for example, a so-called high intensity discharge lamp (HID: High Intensity Discharge lamp) such as a mercury lamp, a metal halide lamp, a high pressure sodium lamp, etc. However, the light-emitting unit 2 is not limited to a high intensity discharge lamp. The light-emitting length of the discharge lamp 1 can be, for example, 2000 mm or more. The light-emitting length is, for example, the distance between the tips of a pair of electrodes 22 (corresponding to an example of a first electrode and a second electrode). The rated lamp voltage of the discharge lamp 1 is, for example, about 2400 V. The rated current of the discharge lamp 1 is, for example, about 4.5 A.

[0014] The light emitting section 2 includes, for example, an arc tube 21, an electrode 22, an outer lead 23, and a base 24.

[0015] The arc tube 21 has, for example, a cylindrical shape. The arc tube 21 has a shape in which the length in the tube axis direction (the direction in which the arc tube 21 extends; which corresponds to an example of a first direction) is longer than the tube outer diameter. Both ends of the arc tube 21 (which correspond to an example of a first end and a second end) are sealed. The both ends of the arc tube 21 can be sealed using, for example, a pinch seal method or a shrink seal method. A discharge medium for generating light having a predetermined wavelength is enclosed in the internal space of the arc tube 21. The wavelength of the light irradiated from the light emitting unit 2 can be changed by the composition of the discharge medium. For example, in the case of generating ultraviolet light, the discharge medium can contain a rare gas such as argon gas and mercury. The discharge medium can also further contain a metal halide containing iron, tin, iodine, etc.

[0016] The arc tube 21 is made of, for example, quartz glass. In this case, the arc tube 21 can be made of, for example, transparent, that is, non-colored quartz glass. The outer diameter of the arc tube 21 is, for example, about 28 mm.

[0017] The electrodes 22 are provided as a pair facing each other. The electrodes 22 are held in a sealed portion at the end of the arc tube 21. One end of the electrode 22 is coil-shaped and provided in the internal space of the arc tube 21. The other end of the electrode 22 is linear and provided inside the sealed portion of the arc tube 21. The electrode 22 contains, for example, tungsten or thoriated tungsten as a main component.

[0018] The outer lead 23 is linear, and one outer lead 23 is provided for each electrode 22. One end of the outer lead 23 is provided inside the sealed portion of the arc tube 21. Also, molybdenum foil is provided inside the sealed portion of the arc tube 21. The electrode 22 and the outer lead 23 are electrically connected via the molybdenum foil. The outer lead 23 contains, for example, molybdenum as a main component.

[0019] One base 24 is provided for each outer lead 23. The base 24 is, for example, cylindrical with one end closed and the other end open. A hole is provided at the closed end of the base 24 for passing the wiring 52 through. At the open end of the base 24, an end of the sealed portion of the light emitting tube 21 is provided. Inside the base 24, the outer lead 23 and the wiring 52 are electrically connected. The inside of the base 24 is filled with an insulating material containing aluminum oxide or the like. The base 24 can be formed using a metal such as stainless steel.

[0020] The protective tube 3 has, for example, a cylindrical shape. Both ends of the protective tube 3 are closed. An inert gas such as nitrogen or a rare gas is sealed in the internal space of the protective tube 3. When the discharge lamp 1 is attached to the treatment tank 101 of the treatment device 100, for example, the end of the protective tube 3 provided with the power supply pin 51 is provided outside the treatment tank 101, and the opposite end is provided inside the treatment tank 101 (see, for example, FIG. 5).

[0021] The protective tube 3 has a shape in which the length in the tube axis direction (the direction in which the protective tube 3 extends) is longer than the tube outer diameter. The light emitting section 2 is provided inside the protective tube 3. In this case, the tube axis direction of the arc tube 21 can be approximately parallel to the tube axis direction of the protective tube 3. The inner diameter of the protective tube 3 is larger than the outer diameter of the arc tube 21. The length of the protective tube 3 in the tube axis direction is longer than the length of the arc tube 21 in the tube axis direction. The outer dimension of the protective tube 3 is, for example, about 60 mm. The protective tube 3 can be formed using, for example, borosilicate glass. The material of the protective tube 3 can be the same as the material of the arc tube 21, for example.

[0022] A pair of holders 4 may be provided inside the protective tube 3, for example. Inside the protective tube 3, the holder 4 holds, for example, the end of the arc tube 21. In this case, the holder 4 may hold, for example, the sealed portion of the arc tube 21. If the holder 4 is provided, the position of the light emitting portion 2 (arc tube 21) relative to the protective tube 3 may be maintained. The holder 4 may have, for example, a disk-shaped member and an elastic member such as a leaf spring. If an elastic member is provided, the light emitting portion 2 (arc tube 21) and the protective tube 3 may be protected from thermal expansion and contraction accompanying turning on and off the discharge lamp 1, vibrations applied to the discharge lamp 1, and the like. The holder 4 may be formed from a heat-resistant material. The holder 4 may be formed from, for example, stainless steel.

[0023] The power supply unit 5 has, for example, a power supply pin 51, a wire 52 (corresponding to an example of a first wire), a wire 53 (corresponding to an example of a second wire), and a holding material 54. A pair of power feed pins 51 are provided (see, for example, FIG. 5). Note that FIG. 1 shows the discharge lamp 1 as viewed from the direction in which the pair of power feed pins 51 are aligned. The pair of power feed pins 51 are provided at one end of the protective tube 3. The pair of power feed pins 51 extend in the tube axis direction of the protective tube 3. One end of the power feed pins 51 is provided outside the protective tube 3. The other end of the power feed pins 51 is provided inside the protective tube 3. The power feed pins 51 can be formed using, for example, copper.

[0024] The wiring 52 is provided inside the protective tube 3. One end of the wiring 52 is electrically connected to the outer lead 23 inside one of the bases 24. That is, the wiring 52 is electrically connected to one of the electrodes 22 via the outer lead 23. The other end of the wiring 52 is electrically connected to one of the power supply pins 51.

[0025] The wiring 53 is provided inside the protective tube 3. As shown in Fig. 1, the wiring 53 extends in the tube axis direction of the arc tube 21 between the holders 4 inside the protective tube 3. One end of the wiring 53 is electrically connected to the outer lead 23 inside the other base 24. That is, the wiring 53 is electrically connected to the other electrode 22 via the outer lead 23. The other end of the wiring 53 is electrically connected to the other power supply pin 51.

[0026] The wiring 52 and the wiring 53 may be, for example, a conductor having a wire diameter of about 0.05 to 2.0 mm. The wiring 52 and the wiring 53 may be, for example, a nickel wire, a tungsten wire, a rhenium wire, a molybdenum wire, a tantalum wire, or an alloy wire containing these metals as a main component (for example, a tungsten-rhenium alloy wire).

[0027] Both end portions of the holding material 54 are held by the holder 4. The holding material 54 holds the wiring 53. For example, the holding material 54 is cylindrical and extends inside the protective tube 3 between the holders 4 in the tube axis direction of the arc tube 21. For example, the wiring 53 can be provided inside the holding material 54 which is cylindrical. The wiring 53 extends inside the holding material 54 in the tube axis direction of the arc tube 21.

[0028] The holding material 54 may also be columnar and extend inside the protective tube 3 in the tube axis direction of the arc tube 21. In this case, the wiring 53 can be held on the outer surface of the holding material 54. The wiring 53 extends on the outer surface of the holding material 54 in the tube axis direction of the arc tube 21. For example, a plurality of linear anchors can be arranged side by side on the outer surface of the holding material 54, and the wiring 53 can be held by the plurality of anchors.

[0029] The holding material 54 is preferably made of a material that can transmit the light irradiated from the light emitting unit 2. In this way, it is possible to prevent the light irradiated from the light emitting unit 2 from being blocked by the holding material 54. Therefore, it is possible to improve the extraction efficiency of the light irradiated from the light emitting unit 2. The holding material 54 can be made of, for example, quartz glass or ceramics such as aluminum oxide. The cross-sectional dimension of the holding material 54 in a direction perpendicular to the extension direction of the holding material 54 can be, for example, about 5 mm.

[0030] Here, when the discharge lamp 1 is transported or when the discharge lamp 1 is attached to the treatment tank 101, vibrations may be applied to the discharge lamp 1. Vibrations may also be applied to the discharge lamp 1 via the treatment tank 101. When vibrations are applied to the discharge lamp 1, the holding material 54 extending inside the protective tube 3 vibrates.

[0031] As described above, both ends of the holding material 54 are held by the holder 4. The light-emitting length of the discharge lamp 1 is, for example, 2000 mm or more. The cross-sectional dimension of the holding material 54 is, for example, about 5 mm. Therefore, vibrations tend to occur in the holding material 54, and the amplitude of the generated vibrations tends to become large. If the amplitude of the generated vibrations becomes large, the holding material 54 tends to collide with at least one of the light-emitting tube 21 and the protective tube 3.

[0032] Furthermore, since the holding material 54 is made of quartz glass or the like, its mass is large. Therefore, when the holding material 54 collides with at least one of the arc tube 21 and the protective tube 3, at least one of the arc tube 21 and the protective tube 3 is likely to be damaged.

[0033] In this case, the amplitude of the generated vibration can be reduced by increasing the cross-sectional dimension of the holding material 54 or by changing the material of the holding material 54. However, doing so makes it easier for the light irradiated from the light-emitting unit 2 to be blocked by the holding material 54. This causes a new problem in that the extraction efficiency of the light irradiated from the light-emitting unit 2 decreases.

[0034] Therefore, the discharge lamp 1 according to this embodiment is provided with a support part 6 that supports the holding material 54. The support part 6 is provided inside the protective tube 3, between the holders 4. At least one support part 6 can be provided. The discharge lamp 1 illustrated in FIG. 1 is provided with a plurality of support parts 6. When a plurality of support parts 6 are provided, the plurality of support parts 6 can be arranged side by side at a predetermined interval in the tube axis direction of the arc tube 21.

[0035] FIG. 2 is a schematic cross-sectional view of the support portion 6 in FIG. 1 taken along the line AA. FIG. 3 is a schematic view of the support portion 6 in FIG. 1 taken along the line BB. As shown in FIGS. 1 to 3, the support portion 6 has, for example, a holding portion 61 and an arm 62.

[0036] The holding portion 61 is, for example, cylindrical and extends in the tube axis direction of the arc tube 21. The holding material 54 and the wiring 53 are provided inside the holding portion 61. Note that, as long as the holding material 54 and the wiring 53 can be held, a slit extending in the tube axis direction of the arc tube 21 may be provided in the holding portion 61. The inner wall of the holding portion 61 may be in contact with the outer wall of the holding material 54, or there may be a gap between the inner wall of the holding portion 61 and the outer wall of the holding material 54. The outer wall of the holding portion 61 may be in contact with the inner wall of the protective tube 3, or there may be a gap between the outer wall of the holding portion 61 and the inner wall of the protective tube 3. For example, the holding portion 61 can be a cylinder with an outer diameter of about 8 mm, an inner diameter of about 6 mm, and a length of about 12 mm. The holding portion 61 is formed of a material having heat resistance. The holding portion 61 can be formed of, for example, stainless steel, ceramics, or the like.

[0037] The arm 62 surrounds the outer wall of the arc tube 21, for example, in a direction perpendicular to the tube axis direction of the arc tube 21 (corresponding to an example of the second direction). The arm 62 has, for example, a ring shape with a part open (a C-shaped ring shape). The arm 62 is joined to the holding part 61. For example, the end of the arm 62 on the opening side is joined to the side of the holding part 61. For example, the end of the arm 62 on the opening side can be welded to the side of the holding part 61. The arm 62 is provided between the inner wall of the protective tube 3 and the outer wall of the arc tube 21. The arm 62 may be in contact with the inner wall of the protective tube 3, or there may be a gap between the arm 62 and the inner wall of the protective tube 3. The arm 62 may be in contact with the outer wall of the arc tube 21, or there may be a gap between the arm 62 and the outer wall of the arc tube 21. However, if the entire circumference of the arm 62 is in contact with the outer wall of the arc tube 21, the thermal stress generated between the arm 62 and the arc tube 21 increases as the discharge lamp 1 (light-emitting section 2) is turned on and off. If the thermal stress becomes too large, at least one of the arm 62 and the arc tube 21 may be damaged. For this reason, it is preferable that a gap be provided between the arm 62 and the outer wall of the arc tube 21 over at least a portion of the entire circumference of the arm 62.

[0038] The arm 62 may be, for example, linear or strip-shaped. However, if the arm 62 is long in the axial direction of the light emitting tube 21, the light irradiated from the light emitting unit 2 is easily blocked. In this case, if the arm 62 is linear, the arm 62 can be shortened in the axial direction of the light emitting tube 21. For this reason, it is preferable to use the arm 62 made of a linear member. The arm 62 is made of a heat-resistant material. The arm 62 can be made of a stainless steel wire with a wire diameter of about 1 mm, for example. The outer diameter of the arm 62 can be about 50 mm, for example.

[0039] Next, the function and effect of the support portion 6 will be described. As described above, the holding material 54 and the wiring 53 are provided inside the holding portion 61. Therefore, when vibration is applied to the discharge lamp 1, the holding portion 61 comes into contact with the outer wall of the arc tube 21 or the inner wall of the protective tube 3. In this case, the distance between the holding portion 61 and the outer wall of the arc tube 21 is smaller than the distance between the holding material 54 and the outer wall of the arc tube 21. The distance between the holding portion 61 and the inner wall of the protective tube 3 is smaller than the distance between the holding material 54 and the inner wall of the protective tube 3. Therefore, the speed at which the holding portion 61 collides with the outer wall of the arc tube 21 or the inner wall of the protective tube 3 is slower than the speed at which the holding material 54 collides with the outer wall of the arc tube 21 or the inner wall of the protective tube 3.

[0040] Furthermore, if the arm 62 is provided, when vibration is applied to the discharge lamp 1, the arm 62 comes into contact with at least one of the outer wall of the arc tube 21 and the inner wall of the protective tube 3. This restricts the movement of the holding part 61, thereby making it possible to prevent the holding part 61 from colliding with the outer wall of the arc tube 21 or the inner wall of the protective tube 3, or to further slow down the speed of the collision.

[0041] Furthermore, the greater the distance between the fulcrums, the greater the amplitude of the beam. Therefore, if the support parts 6 are not provided, the pair of holders 4 serve as fulcrums, so that the amplitude of the holding material 54 increases and the holding material 54 becomes more likely to collide with the outer wall of the arc tube 21 or the inner wall of the protective tube 3.

[0042] In contrast, if the support part 6 is provided, the support part 6 and the holder 4 serve as fulcrums, so that it is possible to prevent the amplitude of the holding material 54 from increasing. Therefore, it is possible to prevent the holding material 54 from colliding with the outer wall of the arc tube 21 or the inner wall of the protective tube 3 when vibration is applied to the discharge lamp 1.

[0043] FIG. 4 is a table illustrating the effect of the support portion 6. In FIG. In Fig. 4, the discharge lamp 1 has an emission length of 2750 mm, a rated lamp voltage of 2400 V, a rated current of 4.5 A, an outer diameter of the arc tube 21 of 28 mm, an outer dimension of the protective tube 3 of 60 mm, and a cross-sectional dimension of the holding material 54 of 5 mm. The number of samples is 9. The effective value of the vibration acceleration applied to the discharge lamp 1 is 9.8 m / s 2 It states that:

[0044] As can be seen from FIG. 4, by providing the supporting portion 6, the rate of breakage of the arc tube 21 or the protective tube 3 can be reduced. In this case, increasing the number of supporting parts 6 can further reduce the rate of breakage of the light emitting tube 21 or the protective tube 3. However, increasing the number of supporting parts 6 makes it easier for the light irradiated from the light emitting part 2 to be blocked, and therefore the illuminance of the discharge lamp 1 is more likely to decrease.

[0045] Therefore, in consideration of reducing the breakage rate and suppressing the decrease in the illuminance of the discharge lamp 1, it is preferable to satisfy the following formula. 916 (mm / piece) ≦ L (mm) / N (piece) ≦ 1375 (mm / piece) Here, L (mm) is the light emitting length, and N (pieces) is the number of supporting parts 6. N (pieces) is a positive integer of 2 or more.

[0046] As described above, if the support portion 6 is provided, it is possible to prevent at least one of the arc tube 21 and the protective tube 3 from being damaged when vibration is applied to the discharge lamp 1. In addition, if "916 (mm / piece) ≦ L (mm) / N (piece) ≦ 1375 (mm / piece)" is satisfied, it is possible to reduce the damage rate and prevent the illuminance of the discharge lamp 1 from decreasing.

[0047] (Processing device) FIG. 5 is a schematic diagram illustrating a processing apparatus 100 provided with a discharge lamp 1 according to the present embodiment. 5, the treatment device 100 that causes a chemical reaction such as a polymerization reaction is illustrated as an example, but the treatment device 100 is not limited to a device that causes a chemical reaction. For example, the treatment device 100 may be a device that sterilizes water or decomposes organic matter contained in water.

[0048] As shown in FIG. 5, a treatment device 100 includes, for example, a treatment tank 101, a lighting device 102, and a discharge lamp 1.

[0049] The liquid 200 to be treated is stored inside the treatment tank 101. The area where the light emitting part 2 of the discharge lamp 1 is provided is immersed in the liquid 200 stored in the treatment tank 101. As described above, since the light emitting part 2 is provided inside the protective tube 3, it is possible to prevent the liquid 200 from reaching the light emitting part 2. The discharge lamp 1 can be attached to the ceiling 101a of the treatment tank 101 via the holder 101b so as to be liquid-tight. In this case, the discharge lamp 1 is immersed in the liquid 200 in a substantially vertical position. The discharge lamp 1 can also be provided on the side or bottom of the treatment tank 101, for example. When the discharge lamp 1 is provided on the side of the treatment tank 101, the discharge lamp 1 is immersed in the liquid 200 in a substantially horizontal position, for example.

[0050] The lighting device 102 is provided outside the treatment tank 101. The lighting device 102 has, for example, a step-up transformer and a ballast. The input side of the lighting device 102 is electrically connected to, for example, an AC power source 102a provided in a factory or the like. The output side of the lighting device 102 is electrically connected to a power supply pin 51 of the discharge lamp 1 outside the treatment tank 101.

[0051] When a voltage is applied to the power supply pin 51 of the discharge lamp 1 by the lighting device 102, for example, a discharge occurs between the pair of electrodes 22, and light (e.g., ultraviolet light) having a predetermined wavelength according to the composition of the discharge medium sealed in the internal space of the arc tube 21 is irradiated from the light emitting unit 2. The light irradiated from the light emitting unit 2 is irradiated to the liquid 200 via the protective tube 3. By irradiating the liquid 200 with the light having the predetermined wavelength, a predetermined process (e.g., a chemical reaction such as a polymerization reaction, sterilization, decomposition of organic matter, etc.) is performed on the liquid 200.

[0052] Although some embodiments of the present invention have been illustrated above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, modifications, etc. can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. In addition, the above-mentioned embodiments can be implemented in combination with each other.

[0053] Below, additional notes regarding the above-described embodiment are given.

[0054] (Appendix 1) A protective tube having a cylindrical shape and extending in a first direction; an arc tube provided inside the protective tube and extending in the first direction; a first electrode provided at a first end of the arc tube; a second electrode provided at a second end of the arc tube opposite the first end; a first holder provided inside the protective tube and configured to hold the first end of the arc tube; a second holder provided inside the protective tube and configured to hold the second end of the arc tube; a first wiring provided inside the protective tube and electrically connected to the first electrode; a second wiring provided inside the protective tube and electrically connected to the second electrode; a holding member that extends in the first direction between the first holder and the second holder inside the protective tube and holds the second wiring; at least one support portion provided between the first holder and the second holder inside the protective tube and configured to support the holding material; Equipped with The support portion is A holding portion having a cylindrical shape and in which the holding material is provided; an arm that surrounds an outer wall of the arc tube in a second direction perpendicular to the first direction and is joined to the holding portion; A discharge lamp having a

[0055] (Appendix 2) The light emitting length of the light emitting tube is L (mm), 2. A discharge lamp according to claim 1, wherein the following formula is satisfied when the number of the supporting parts is N (pieces): 916 (mm / piece) ≦ L (mm) / N (piece) ≦ 1375 (mm / piece) N is a positive integer of 2 or greater.

[0056] (Appendix 3) 3. The discharge lamp according to claim 1 or 2, wherein the arm is in the shape of a ring with a portion open, and an end portion of the arm on the open side is joined to a side surface of the holding portion.

[0057] (Appendix 4) 4. The discharge lamp according to claim 1, wherein the arm is made of a linear member.

[0058] (Appendix 5) A discharge lamp according to any one of appendices 1 to 4; a treatment tank in which the discharge lamp is attached and in which a liquid to be treated is stored; A processing device comprising: [Explanation of symbols]

[0059] REFERENCE SIGNS LIST 1 discharge lamp, 2 light emitting part, 3 protective tube, 4 holder, 5 power supply part, 6 support part, 21 light emitting tube, 22 electrode, 52 wiring, 53 wiring, 54 holding material, 61 holding part, 62 arm, 100 treatment device, 101 treatment tank, 200 liquid

Claims

1. A protective tube having a cylindrical shape and extending in a first direction; an arc tube provided inside the protective tube and extending in the first direction; a first electrode provided at a first end of the arc tube; a second electrode provided at a second end of the arc tube opposite the first end; a first holder provided inside the protective tube and configured to hold the first end of the arc tube; a second holder provided inside the protective tube and configured to hold the second end of the arc tube; a first wiring provided inside the protective tube and electrically connected to the first electrode; a second wiring provided inside the protective tube and electrically connected to the second electrode; a holding member that extends in the first direction between the first holder and the second holder inside the protective tube and holds the second wiring; at least one support portion provided between the first holder and the second holder inside the protective tube and configured to support the holding material; Equipped with The support portion is a holding portion having a cylindrical shape and in which the holding material is provided; an arm that surrounds an outer wall of the light emitting tube in a second direction perpendicular to the first direction and is joined to the holding portion; A discharge lamp having a

2. The light emitting length of the light emitting tube is L (mm), 2. The discharge lamp according to claim 1, wherein the following formula is satisfied when the number of said supporting portions is N: 916 (mm / piece) ≦ L (mm) / N (piece) ≦ 1375 (mm / piece) N is a positive integer of 2 or more.

3. 3. The discharge lamp according to claim 1, wherein the arm is in the shape of a ring with a portion open, and an end of the arm on the open side is joined to a side surface of the holding portion.

4. 3. The discharge lamp according to claim 1, wherein the arm is made of a linear member.

5. A discharge lamp according to claim 1 or 2; a treatment tank in which the discharge lamp is attached and in which a liquid to be treated is stored; A processing device comprising:

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