JP2021039854A - Discharge lamp - Google Patents

Abstract

To provide a discharge lamp in which an internal lead wire can be appropriately connected with an external lead wire.SOLUTION: A discharge lamp includes an arc tube, a sealing part, a metal foil, an internal lead wire, an external lead wire and a sleeve. The arc tube is provided with an electrode at the inside thereof. The sealing part is disposed on both ends of the arc tube, and seals the end portion of the electrode. The metal foil is sealed in the sealing part, and one end portion thereof is connected to the electrode. One end side of the internal lead wire is connected to the other end portion of the metal foil, and the other end side of the internal lead wire is led out from the sealing part. The external lead wire is connected to the led out internal lead wire. The sleeve has a housing part, a first through hole and a second through hole. The housing part houses a connection part between the internal lead wire and the external lead wire. The first through hole communicates with the housing part in a first direction, and allows one of the internal lead wire and the external lead wire to be inserted thereinto. The second through hole communicates with the housing part in a second direction, and allows the other of the internal lead wire and the external lead wire to be inserted thereinto.SELECTED DRAWING: Figure 2

Description

Embodiments of the present invention relate to discharge lamps.

For example, in a semiconductor exposure process, a UV (ultraviolet) ink or UV paint drying process, a resin curing process, etc., a discharge lamp such as a mercury lamp or a metal halide lamp is used as a light source that emits ultraviolet rays because a photochemical reaction is carried out by ultraviolet rays. It is used.

Japanese Unexamined Patent Publication No. 2005-63732

In the discharge lamp, a cylindrical sleeve that covers the circumference of the connection part is used to connect the internal lead wire drawn from the inside of the arc tube and the external lead wire connected to the power supply device to improve reliability. May be done.

However, if an attempt is made to reduce the space for arranging the external lead wire in order to save space, there is a concern that the wiring may come off from the sleeve or the brazing material filled inside the sleeve may leak out.

An object to be solved by the present invention is to provide a discharge lamp capable of appropriately connecting an internal lead wire and an external lead wire.

The discharge lamp of the embodiment includes an arc tube, a sealing portion, a metal foil, an internal lead wire, an external lead wire, and a sleeve. The arc tube is provided with an electrode inside. Sealing portions are arranged at both ends of the arc tube to seal the ends of the electrodes. The metal foil is sealed in a sealing portion, and one end thereof is connected to an electrode. One end of the internal lead wire is connected to the other end of the metal foil, and the other end is pulled out from the sealing portion. The external lead wire is connected to the internal lead wire drawn from the sealing portion. The sleeve has an accommodating portion, a first through-hole, and a second through-hole. The accommodating portion accommodates the connection portion between the internal lead wire and the external lead wire. The first through port communicates with the accommodating portion in the first direction, and one of the internal lead wire and the external lead wire is inserted. The second through hole communicates with the accommodating portion in the second direction intersecting with the accommodating portion in the first direction, and the other of the internal lead wire and the external lead wire is inserted.

According to the present invention, the internal lead wire and the external lead wire can be appropriately connected.

It is a schematic diagram which shows the discharge lamp which concerns on embodiment. It is an enlarged view of the region P1 shown in FIG. It is a figure which shows an example of the mounting method of the external lead wire using the mounting jig. It is a figure which shows an example of a mounting jig. 2A is a cross-sectional view taken along the line AA and FIG. 2B is a cross-sectional view taken along the line BB of FIG. 2A. It is a schematic diagram which shows the discharge lamp which concerns on the modification of embodiment. It is a top view which shows the sleeve which concerns on the modification of embodiment. It is a schematic diagram which shows the discharge lamp which concerns on a reference example. It is a figure which shows the relationship between the shape of a sleeve and the defect occurrence rate.

The discharge lamp 5 according to the embodiment described below includes an arc tube 6, a sealing portion 11, a metal foil 10, an internal lead wire 12, an external lead wire 14, and a sleeve 13. The arc tube 6 is provided with an electrode 7 inside. The sealing portions 11 are arranged at both ends of the arc tube 6 and seal the ends of the electrodes 7. The metal foil 10 is sealed in the sealing portion 11, and one end thereof is connected to the electrode 7. One end 12a of the internal lead wire 12 is connected to the other end of the metal foil 10, and the other end 12b is pulled out from the sealing portion 11. The external lead wire 14 is connected to the internal lead wire 12 drawn from the sealing portion 11. The sleeve 13 has an accommodating portion 16, a first through-hole, and a second through-hole. The accommodating portion 16 accommodates a connecting portion between the internal lead wire 12 and the external lead wire 14. The first through port communicates with the accommodating portion 16 in the first direction, and one of the internal lead wire 12 and the external lead wire 14 is inserted. The second through-hole communicates with the accommodating portion 16 in the second direction intersecting with the accommodating portion 16 in the first direction, and the other of the internal lead wire 12 and the external lead wire 14 is inserted.

Further, in the discharge lamp 5 according to the embodiment described below, at least one of the internal lead wire 12 and the external lead wire 14 is bent at the accommodating portion 16.

Further, the discharge lamp 5 according to the embodiment described below is arranged at a position where at least one of the internal lead wire 12 and the external lead wire 14 is offset from the center of the accommodating portion 16.

Further, the sleeve 13 according to the embodiment described below has a tubular portion 13c that covers the accommodating portion 16 and through holes 13c1 and 13c2 that penetrate the tubular portion 13c in the thickness direction. Of the first through-hole and the second through-hole, one is the openings 13a and 13b located at the end of the tubular portion 13c, and the other is the through holes 13c1 and 13c2.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In addition, each embodiment shown below does not limit the technique disclosed by this invention. In addition, each embodiment and each modification shown below can be appropriately combined within a consistent range. Further, in the description of each embodiment, the same reference numerals are given to the same configurations, and the following description will be omitted as appropriate.

[Embodiment]
FIG. 1 is a schematic view showing a discharge lamp according to an embodiment. As shown in FIG. 1, the discharge lamp 5 according to the embodiment is attached to, for example, the mounting portion 3 provided in the ultraviolet irradiation device 1 and is used to irradiate the irradiated body with ultraviolet rays. The mounting portion 3 has a pair of holding members (not shown) for holding the discharge lamp 5, and the pair of holding members hold the pair of base members 18 of the discharge lamp 5. A sleeve 13 is provided inside the base member 18.

For the sake of clarity, FIG. 1 illustrates a three-dimensional Cartesian coordinate system including a Z-axis having a vertically upward direction as a positive direction and a vertically downward direction as a negative direction. Such a Cartesian coordinate system may also be shown in other drawings used in the later description.

(Discharge lamp configuration)
The discharge lamp 5 according to the embodiment is a long arc type discharge lamp such as a long arc type mercury lamp or a long arc type metal halide lamp, and is a so-called high intensity discharge lamp (HID: High Intensity Discharge lamp). As shown in FIG. 1, the discharge lamp 5 includes an arc tube 6, an electrode 7, a sleeve 13, and an external lead wire 14.

The arc tube 6 is formed in a cylindrical shape by quartz glass having light transmission, and has a discharge space 6a inside. For example, a rare gas such as argon gas and mercury having a high vapor pressure are sealed in the discharge space 6a, and in addition to these, a metal halide containing iron, tin, iodine and the like is sealed.

FIG. 2 is an enlarged view of the region P1 shown in FIG. FIG. 2A is a view of the region P1 viewed from the same direction as that of FIG. 1, and FIG. 2B is a view of the region P1 viewed from the positive direction side of the X-axis. In FIG. 2, the base member 18 shown in FIG. 1 is not shown.

As shown in FIG. 2A, the electrode 7 has an electrode shaft 8 and a coil 9. One end of the electrode shaft 8 is directed toward the discharge space 6a, and the other end is welded to the metal foil 10 and joined. The coil 9 is provided by winding around one end of the electrode shaft 8. The electrode shaft 8 and the coil 9 are formed of a metal material containing triated tungsten as a main component.

The metal foil 10 is formed in a rectangular shape by molybdenum. Further, one end of the internal lead wire 12 is joined to the other end of the metal foil 10.

As shown in FIGS. 1 and 2A, columnar sealing portions 11 that seal the discharge space 6a so as to cover the metal foil 10 are formed at both ends of the arc tube 6. As shown in FIG. 2A, the sealing portion 11 seals the other end of the electrode shaft 8, the metal foil 10, and one end 12a of the internal lead wire 12. The other end 12b side of the internal lead wire 12 is drawn out from the sealing portion 11. The other end 12b side of the internal lead wire 12 drawn out from the sealing portion 11 is inserted into the inside of the sleeve 13. The internal lead wire 12 is formed of molybdenum, for example, in the shape of a rod having a diameter of φ2 [mm].

The sleeve 13 is a member that accommodates the internal lead wire 12 and the external lead wire 14 and connects and conducts the internal lead wire 12 and the external lead wire 14. The sleeve 13 has openings 13a and 13b, tubular portions 13c, through holes 13c1 and 13c2, and accommodating portions 16.

As shown in FIG. 2A, the opening 13a is provided at the end of the sleeve 13 on the arc tube 6 side, that is, on the X-axis negative direction side. The opening 13b is provided at the end on the X-axis positive direction side of the sleeve 13 located on the opposite side of the tubular portion 13c and the accommodating portion 16 from the opening 13a. The openings 13a and 13b are examples of first through ports that communicate with the accommodating portion 16 in the X-axis direction as the first direction. The other end 12b side of the internal lead wire 12 drawn out from the sealing portion 11 is inserted into the opening 13a, and the other end 12b projects from the opening 13b to the outside of the sleeve 13.

The through holes 13c1 and 13c2 are arranged so as to sandwich the accommodating portion 16 and face each other in the Z-axis direction intersecting the X-axis direction. The through holes 13c1 and 13c2 penetrate the tubular portion 13c in the thickness direction. The through holes 13c1 and 13c2 are examples of the second through holes that communicate with the accommodating portion 16 in the Z-axis direction as the second direction. The external lead wire 14, specifically the core wire 14a of the external lead wire 14, is inserted into the through hole 13c1, and the exposed portion 14a2 located at the end of the core wire 14a is formed from the through hole 13c2 to the outside of the sleeve 13. It is protruding. The through holes 13c1 and 13c2 have circular or square openings when viewed from the Z direction. For example, the through holes 13c1 and 13c2 are formed so that the diameter is 0.2 [mm] or more and 4 [mm] or less, or one side is 0.2 [mm] or more and 4 [mm] or less. Specifically, the through holes 13c1 and 13c2 can be squares having a side of 2 [mm].

The accommodating portion 16 is a columnar space formed between the openings 13a and 13b, and is partitioned from the outside of the sleeve 13 by a tubular portion 13c that covers the outside of the accommodating portion 16. In the accommodating portion 16, the core wires 14a of the internal lead wires 12 and the external lead wires 14 extending along the X-axis direction and the Z-axis direction intersect, and the internal lead wires 12 and the core wires 14a come into contact with each other at the intersecting portions. Connected and conducting.

Further, the internal lead wire 12 and the core wire 14a are joined to each other inside the accommodating portion 16 by the brazing material 15. The brazing material 15 is a hard brazing material such as silver brazing, and can improve the reliability of conduction at the connecting portion of the internal lead wire 12 and the core wire 14a. As shown in FIGS. 2 (a) and 2 (b), the brazing material 15 may be filled in the entire sleeve 13 so as to spread between the openings 13a and 13b located at both ends of the accommodating portion 16. It may be partially arranged only in the contact portion between the lead wire 12 and the core wire 14a and in the vicinity thereof.

The sleeve 13 is formed of, for example, a metal material having a melting point higher than the processing temperature of the brazing operation using the brazing material 15, such as copper, iron, nickel, stainless steel, molybdenum, and tungsten. If necessary, the surface of the sleeve 13 may be plated with tin, nickel, silver, gold or the like to enhance the oxidation resistance of the sleeve 13. Specifically, tin-plated copper whose surface is plated with tin can be used as the material for the sleeve 13. Further, the sleeve 13 can have an outer diameter of the tubular portion 13c of φ6 [mm], an inner diameter of φ5 [mm], and a total length (dimension in the X-axis direction) of 6 [mm]. The brazing material 15 is, for example, a silver wax containing 5 [%] of silver, 85 [%] of copper, 5 [%] of phosphorus, and 5 [%] of tin, and has a brazing working temperature of 620 to 660 [° C.]. Can be in the range of.

The external lead wire 14 is arranged outside the arc tube 6. One end of the external lead wire 14 is inserted into the sleeve 13. The external lead wire 14 has, for example, a core wire 14a inside, and a so-called wire harness whose periphery is coated with an insulating material such as fluororesin is used. The external lead wire 14 is inserted into the accommodating portion 16 of the sleeve 13 with the core wire 14a exposed. The core wire 14a passes through the through hole 13c1 of the sleeve 13, protrudes into the accommodating portion 16 of the sleeve 13, and further extends to the outside of the sleeve 13 through the through hole 13c2. The core wire 14a and the internal lead wire 12 are connected so as to be conductive in the accommodating portion 16 of the sleeve 13. For the external lead wire 14, for example, the outer diameter of the coated portion may be φ4 [mm], and the outer diameter of the core wire 14a may be φ2 [mm]. The core wire 14a is, for example, a stranded wire composed of a plurality of tin-plated annealed copper wires.

Further, the external lead wire 14 can have a length L1 of the exposed portion 14a1 of the core wire 14a located outside the through hole 13c1 of 1 [mm] or more. As a result, it is possible to suppress a problem that the coated portion of the external lead wire 14 is burnt out during brazing. On the other hand, the length L1 of the external lead wire 14 can be 10 [mm] or less. As a result, it is possible to suppress a problem of electric leakage from the exposed portion 14a1.

Further, the external lead wire 14 can have a length L2 of an exposed portion 14a2 of the core wire 14a located outside the through hole 13c2 of 0.5 [mm] or more. This makes it easier to visually confirm whether or not the brazing work has been properly performed. On the other hand, the length L2 of the exposed portion 14a2 of the external lead wire 14 can be set to 10 [mm] or less. As a result, it is possible to prevent the discharge lamp 5 from being damaged or damaged due to interference between the base member 30 (see FIG. 1) attached to the discharge lamp 5 and the exposed portion 14a2. The exposed portion 14a2 may be cut after the brazing operation so as to be flush with the through hole 13c2 (that is, the length L2 = 0).

(Installation of internal lead wire and external lead wire)
Here, an example of a method of attaching the internal lead wire 12 and the external lead wire 14 to the sleeve 13 will be described with reference to FIG. FIG. 3 is a diagram showing an example of a method of mounting an external lead wire using a mounting jig. FIG. 3A is a plan view of the sleeve 13 viewed from the Z-axis positive direction side, and FIG. 3B is a side view of the sleeve 13 viewed from the X-axis positive direction side.

As shown in FIG. 3, first, the core wire 14a of the external lead wire 14 is inserted into the sleeve 13. Next, when the mounting jig 20 is inserted into the opening 13b (or the opening 13a) along the X axis, the core wire 14a is bent toward the inner wall side of the tubular portion 13c according to the shape of the mounting jig 20. 14aa is formed. As a result, a space for inserting the other end 12b side of the internal lead wire 12 (see FIG. 2A) is provided in the central portion of the openings 13a and 13b, so that the internal lead wire 12 can be easily mounted.

Next, the mounting jig 20 used for bending the core wire 14a of the external lead wire 14 will be described with reference to FIG. FIG. 4 is a diagram showing an example of a mounting jig. FIG. 4A is a plan view of the mounting jig 20 viewed from the Z-axis positive direction side, and FIG. 4B is a side view of the mounting jig 20 viewed from the Y-axis positive direction side.

As shown in FIG. 4, the mounting jig 20 is a columnar member having a peripheral surface 23 having an outer diameter dimension that can be inserted into the opening 13b (or the opening 13a), and the end surface 21 on the negative direction side of the X axis. Is formed so as to be inclined with respect to the peripheral surface 23. The material of the mounting jig 20 can be, for example, tungsten, molybdenum, or the like.

Further, the inclination angle θ of the end face 21 with respect to the length direction (X-axis direction) of the mounting jig 20 can be, for example, less than 45 [degrees], specifically, 30 [degrees]. As a result, the mounting jig 20 interferes with the core wire 14a, so that the core wire 14a can be easily bent in the radial direction (Y-axis direction) without pushing the core wire 14a in the length direction (X-axis direction) of the sleeve 13. .. From the viewpoint of preventing damage to the core wire 14a, the tip portion 22 of the mounting jig 20 and the peripheral edge portion 24 of the end surface 21 can be chamfered. In such a case, the tip portion 22 and the peripheral edge portion 24 can have a radius of curvature R of 0.1 [mm] or more, for example, 0.1 to 0.5 [mm].

The shape of the mounting jig 20 is not limited to that shown in FIG. For example, a rod-shaped member having an outer diameter that can be inserted into the gap between the core wire 14a inserted through the through holes 13c1 and 13c2 and the inner wall of the tubular portion 13c may be used as the mounting jig 20. In such a case, the mounting jig 20 is inserted through the opening 13b, and the internal lead wire 12 is inserted into the opening 13a of the sleeve 13 and the internal lead wire 12 while maintaining the state in which the core wire 14a is moved so as to be pressed against the inner wall of the tubular portion 13c. The internal lead wire 12 and the external lead wire 14 may be mounted by inserting the mounting jig 20 through the opening 13b and then removing the mounting jig 20 from the opening 13b.

(Sleeve brazing and caulking)
As shown in FIG. 3, a bent portion 14aa is formed in the core wire 14a of the external lead wire 14, and then the internal lead wire 12 is inserted through the opening 13a and the opening 13b of the sleeve 13, and then the sleeve 13 is inserted as described above. Brazing is performed on the connection portion between the core wire 14a accommodated in the accommodating portion 16 and the internal lead wire 12. The brazing operation is performed from the opening 13b side away from the discharge lamp 5. Specifically, for example, after applying flux to the opening 13b, the sleeve 13, the internal lead wire 12, and the core wire 14a of the external lead wire 14 are heated to about 700 [° C.] using a hydrogen oxygen burner to open the opening. Brazing is performed by pouring the brazing material 15 from the portion 13b side. At this time, if the opening 13a is open, a part of the brazing material 15 may come into contact with or approach the discharge lamp 5, and the sealing portion 11 of the discharge lamp 5 may be damaged.

Therefore, it is advisable to crimp the opening 13a side before brazing. FIG. 5A is a cross-sectional view taken along the line AA of FIG. As shown in FIG. 5A, the sleeve 13 is crimped without a gap between the internal lead wire 12 and the opening 13a. By pre-caulking the opening 13a side of the sleeve 13 with a tool or the like (not shown) in this way, damage to the sealing portion 11 due to leakage of the brazing material 15 can be suppressed.

FIG. 5B is a cross-sectional view taken along the line BB of FIG. As shown in FIG. 5B, after the brazing material 15 is filled inside the sleeve 13, the core wire 14a of the sleeve 13, the internal lead wire 12, and the external lead wire 14 is crimped using a tool (not shown) or the like. By having the crimped portion P2, the connection between the core wire 14a of the external lead wire 14 and the internal lead wire 12 can be made more reliable. At this time, by fixing the direction of the external lead wire 14 including the core wire 14a, it is possible to suppress the occurrence of a problem that the direction of the external lead wire 14 with respect to the circumferential direction of the discharge lamp 5 deviates from a predetermined position.

[Modification example]
FIG. 6 is a schematic view showing a discharge lamp according to a modified example of the embodiment. Comparing the discharge lamp 5 shown in FIG. 2 with that of FIG. 6, the orientation in which the sleeve 13 is arranged is different. That is, in FIG. 2, the internal lead wire 12 is inserted through the opening 13a and the opening 13b, and the core wire 14a of the external lead wire 14 is inserted through the through holes 13c1 and 13c2, whereas in the example shown in FIG. The core wire 14a of the external lead wire 14 is inserted through the opening 13a and the opening 13b, and the internal lead wire 12 is inserted through the through holes 13c1 and 13c2. In such a case, as shown in FIG. 3, the work step of forming the bent portion 14aa using the mounting jig 20 becomes unnecessary.

FIG. 7 is a plan view showing a sleeve according to a modified example of the embodiment. In the example shown in FIG. 7A, the position where the core wire 14a of the external lead wire 14 extending in the Z-axis direction is offset to the negative direction side of the Y-axis with respect to the center C of the accommodating portion 16 (see FIG. 6) of the sleeve 13. It is arranged in. On the other hand, in the example shown in FIG. 7B, the through holes 13c1 and 13c2 are provided so that the internal lead wire 12 extending in the X-axis direction is arranged at a position offset to the positive direction side of the Y-axis with respect to the center C. It is formed. When at least one of the internal lead wire 12 and the external lead wire 14 is arranged at a position offset from the center C in this way, the internal lead wire 12 and the external lead wire 14 interfere with each other inside the sleeve 13. It becomes difficult. Therefore, an appropriate connection between the internal lead wire 12 and the external lead wire 14 using the sleeve 13 becomes easy. In the brazing and caulking of the sleeve 13 in the examples shown in FIGS. 6 and 7, first, the opening 13a side is caulked, then brazing is performed in a state where the core wire 14a is in contact with the internal lead wire 12, and then brazing is performed. It is preferable to crimp the core wire 14a of the sleeve 13, the internal lead wire 12, and the external lead wire 14.

[Relationship between sleeve shape and defect rate]
Next, the relationship between the shape of the sleeve and the defect occurrence rate will be described with reference to FIGS. 8 and 9.
FIG. 8 is a schematic view showing a discharge lamp according to a reference example. 8 (a) and 8 (b) correspond to those illustrated from the same viewpoint as in FIGS. 2 (a) and 2 (b), respectively.

In the example shown in FIG. 8, a sleeve 113 having openings 113a and 113b was used instead of the sleeve 13 shown in FIG. Further, in order to reduce the routing space of the external lead wire 14, a bent portion 14b is provided at the tip of the exposed core wire 14a, and the bent portion 14b is inserted from the opening 113a side like the internal lead wire 12, and the sleeve 113 is inserted into the Y. After caulking in the axial direction, brazing was performed from the opening 113b side.

FIG. 9 is a diagram showing the relationship between the shape of the sleeve and the defect occurrence rate. In FIG. 9, "Example 1" is the case where the discharge lamp 5 according to the first embodiment is manufactured, that is, when the sleeve 13 is brazed after being crimped, "Example 2" is the case where the sleeve 13 is crimped. "Example 3" shows the case where only brazing is performed without caulking the sleeve 13, and "reference example" shows the case where the discharge lamp shown in FIG. 8 is manufactured. Is. Thirty discharge lamps 5 were manufactured under the same other conditions, and the defect occurrence rates were compared.

As shown in FIG. 9, no defect occurred in the discharge lamp 5 according to Examples 1 to 3. That is, in the above-described embodiment and modification, the discharge lamp 5 in which both the sleeve 13 is caulked and the brazing material 15 is filled by brazing has been described, but the present invention is not limited to this, and only one of the discharge lamps 5 is performed. It may be the lamp 5. On the other hand, in the discharge lamp according to the reference example, the wax material 15 leaked from the opening 113a side in 2 out of 30 lamps and adhered to the sealing portion 11. Since both the internal lead wire 12 and the external lead wire 14 are arranged on the opening 113a side, the gap on the opening 113a side may not be completely filled by caulking, and the brazing material 15 may leak out. It has been suggested.

[Other variants]
In the above embodiment, the external lead wire 14 has been described as being bent at the accommodating portion 16 of the sleeve 13, but the present invention is not limited to this, and for example, the internal lead wire 12 may be bent, and the internal lead may be bent. Both the wire 12 and the external lead wire 14 may be bent.

Further, in the above-described embodiment and modification, the sleeve 13 is shown as having a columnar accommodating portion 16, but the sleeve 13 is not limited to this, and may be, for example, an elliptical columnar or a prismatic column.

Further, in the above-described embodiment and modification, the other end 12b of the internal lead wire 12 is shown as being exposed to the outside of the sleeve 13, but the present invention is not limited to this, and for example, the opening 13b or penetration of the sleeve 13 is not limited to this. It may be flush with the hole 13c2.

Further, in the above-described embodiments and modifications, the opening 13b and the through hole 13c2 have been described as essential configurations, but the present invention is not limited to this, and one or both of the opening 13b and the through hole 13c2 are present. You don't have to.

As described above, the discharge lamp 5 according to the embodiment includes an arc tube 6, a sealing portion 11, a metal foil 10, an internal lead wire 12, an external lead wire 14, and a sleeve 13. The arc tube 6 is provided with an electrode 7 inside. The sealing portions 11 are arranged at both ends of the arc tube 6 and seal the ends of the electrodes 7. The metal foil 10 is sealed in the sealing portion 11, and one end thereof is connected to the electrode 7. One end 12a of the internal lead wire 12 is connected to the other end of the metal foil 10, and the other end 12b is pulled out from the sealing portion 11. The external lead wire 14 is connected to the internal lead wire 12 drawn from the sealing portion 11. The sleeve 13 has an accommodating portion 16, a first through-hole, and a second through-hole. The accommodating portion 16 accommodates a connecting portion between the internal lead wire 12 and the external lead wire 14. The first through port extends from the accommodating portion 16 in the first direction, and one of the internal lead wire 12 and the external lead wire 14 is inserted therethrough. The second through-hole extends from the accommodating portion 16 in the second direction intersecting the first direction, and the other of the internal lead wire 12 and the external lead wire 14 is inserted therethrough. As a result, the internal lead wire 12 and the external lead wire 14 can be appropriately connected.

Further, in the discharge lamp 5 according to the embodiment, at least one of the internal lead wire 12 and the external lead wire 14 is bent at the accommodating portion 16. As a result, the other of the internal lead wire 12 and the external lead wire 14 can be easily inserted, and the internal lead wire 12 and the external lead wire 14 can be appropriately connected.

Further, the discharge lamp 5 according to the embodiment is arranged at a position where at least one of the internal lead wire 12 and the external lead wire 14 is offset from the center of the accommodating portion 16. As a result, the other of the internal lead wire 12 and the external lead wire 14 can be easily inserted, and the internal lead wire 12 and the external lead wire 14 can be appropriately connected.

Further, the sleeve 13 according to the embodiment has a tubular portion 13c that covers the accommodating portion 16 and through holes 13c1 and 13c2 that penetrate the tubular portion 13c in the thickness direction. Of the first through-hole and the second through-hole, one is the openings 13a and 13b located at the end of the tubular portion 13c, and the other is the through holes 13c1 and 13c2. This facilitates proper connection between the internal lead wire 12 and the external lead wire 14 using the sleeve 13.

Although embodiments of the present invention have been described, the present embodiments are presented as examples and are not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The present embodiment and its modifications are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

1 Ultraviolet irradiation device 5 Discharge lamp 6 Emission tube 6a Discharge space 7 Electrode 11 Sealing part 12 Internal lead wire 13 Sleeve 13a, 13b Opening 13c Cylindrical part 13c1, 13c2 Through hole 14 External lead wire 15 Wax material 16 Containment part 18 Base member

Claims (4)

With an arc tube with electrodes inside;
With a sealing portion arranged at both ends of the arc tube and sealing the end of the electrode;
With a metal foil sealed in the sealing portion and one end connected to the electrode;
One end side is connected to the other end of the metal foil, and the other end is an internal lead wire drawn from the sealing portion;
With an external lead wire connected to the internal lead wire drawn from the sealing portion;
A first accommodating portion that accommodates a connecting portion between the internal lead wire and the external lead wire, and a first accommodating portion that communicates with the accommodating portion in the first direction and one of the internal lead wire and the external lead wire is inserted. A sleeve having a through-hole and a second through-hole that communicates with the accommodating portion in a second direction intersecting the first direction and is inserted with the other of the internal lead wire and the external lead wire;
Equipped with a discharge lamp. The discharge lamp according to claim 1, wherein at least one of the internal lead wire and the external lead wire is bent at the accommodating portion. The discharge lamp according to claim 1 or 2, wherein at least one of the internal lead wire and the external lead wire is arranged at a position offset from the center of the accommodating portion. The sleeve has a tubular portion that covers the accommodating portion and a through hole that penetrates the tubular portion in the thickness direction.
The first through hole and the second through hole, one of which is an opening located at the end of the tubular portion and the other of which is the through hole, according to any one of claims 1 to 3. The described discharge lamp.

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