JP2010114051A - Discharge lamp with base, and light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that it is difficult to bond a base and a lead well in a cold-cathode fluorescent discharge lamp. <P>SOLUTION: The base 11 in order to attach it to a glass tube 4 has the metal base body 12 having an inner diameter into which the glass tube 4 can be inserted, a lead connection part 13, and a coupling part 14. The lead connection part 13 and the lead 6 are bonded by using a connection auxiliary member 19. The connection auxiliary member 19 has a part abutting on the lead 6, and a part abutting on the lead connection part 13. By this, strong bonding of the lead connection part 13 and the lead becomes possible. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a discharge lamp such as a cold cathode fluorescent discharge lamp (CCFL) and a light source device using the discharge lamp.

Cold cathode fluorescent discharge lamps (CCFLs) used as a backlight light source for liquid crystal display devices such as TV monitors and personal computers are disclosed in, for example, Japanese Patent Application Laid-Open No. 2007-234551 (Patent Document 1), WO 2008/001562 (Patent Document 2), and the like. Is known. FIG. 1 shows a baseless cold cathode fluorescent discharge tube 1 (hereinafter simply referred to as a discharge tube) substantially the same as that disclosed in Patent Document 1. The discharge tube 1 includes a cylindrical glass tube 4 that surrounds the pair of electrodes 2 and 3 and is filled with mercury, a phosphor layer 5 formed on the inner wall of the glass tube 4, and a glass tube 4. It consists of a pair of leads 6 and 7 led out from the center of the pair of ends to the outside in the axial direction of the glass tube 4. In order to light the discharge tube 1 of FIG. 1, a predetermined voltage must be applied to the pair of leads 6 and 7 from a power source (not shown). In order to easily connect the discharge tube 1 to a power source, the discharge tube 1 of FIG. 1 is equipped with a base (not shown), which can be called a base, a cap, a lamp base or a connector, and a discharge tube with a base, that is, a discharge lamp. A discharge lamp is mounted on a pair of connectors (holders) configured and arranged on a substrate or a fixed plate. Since the pair of connectors (holders) are connected to the power source, the pair of leads 6 and 7 of the discharge tube 1 in FIG. 1 are connected to the power source via the pair of bases and the pair of connectors (holders).

By the way, as disclosed in Patent Documents 1 and 2, the base has a lead connection portion and a lead connection portion for electrically connecting the pair of leads 6 and 7 of the discharge tube 1 and the base body. And a connecting portion for electrically and mechanically connecting to the base body. The lead connecting portion disclosed in Patent Document 1 is formed wider than the strip-shaped connecting portion, and has a hole or a groove for positioning the lead. Therefore, it is possible to connect the lead to the desired position of the lead connection portion relatively accurately. However, it is required to further improve the reliability of the connection between the lead and the lead connection portion.

There is also a demand for a discharge lamp having a structure that can easily achieve the connection between the lead and the lead connecting portion while preventing the glass tube from being damaged.
JP 2007-234551 A WO2008 / 001562 publication

Accordingly, an object of the present invention is to provide a discharge lamp and a light source device capable of improving the reliability of connection between a lead and a lead connecting portion.

The present invention for solving the above problems is as follows.
A pair of electrodes, a glass tube surrounding the pair of electrodes, and a pair of leads respectively connected to the pair of electrodes and led out from both ends of the glass tube to the outside of the glass tube A discharge tube, a base attached to the discharge tube, and a metal connection auxiliary member for assisting the connection of the base to the lead,
The base includes a cylindrical base body covering one end portion of the glass tube, a lead connection part electrically connected to the lead, and the lead connection part electrically and mechanically to the base body. A coupling portion provided between the lead connection portion and the base body for coupling,
The connection auxiliary member is electrically and mechanically connected to the lead connection portion without the lead, and a first portion that is in contact with the lead and is disposed opposite the lead connection portion via the lead. The present invention relates to a discharge lamp characterized by having a second part connected.

The connection auxiliary member is preferably electrically and mechanically coupled to the lead and the lead connecting portion with welding.
Further, it is desirable that the connection assisting member is electrically and mechanically coupled to the lead and the lead connecting portion with plastic deformation.
Further, the connection auxiliary member can be electrically and mechanically coupled to the lead and the lead connecting portion by soldering (for example, soldering).
Further, the connection auxiliary member can be electrically and mechanically coupled to the lead and the lead connecting portion with two or all selected from plastic deformation, welding, and brazing.
Further, it is preferable that the connection auxiliary member is formed in a cylindrical shape, and a part of the lead and the lead connection portion are disposed in the connection auxiliary member.
Moreover, it is preferable that the cylindrical connection auxiliary member has a slit extending in the axial direction and is elastically deformable in the radial direction.
The cylindrical connection auxiliary member has one end close to the glass tube and the other end farther from the glass tube than the one end, and the opening area of the one end is the other end. It is desirable that the opening area is larger than the end opening area.
In addition, it is desirable that at least a portion of the lead contacting the connection auxiliary member is a flat surface.
The lead has a U-shaped or U-shaped tip, and the lead connecting portion and the second portion of the connection auxiliary member are disposed in the U-shaped or U-shaped tip. It is desirable.
The connection auxiliary member may be formed in a U shape or a U shape, and a part of the lead and the lead connection portion may be disposed in the U shape or the U shape connection auxiliary member. desirable.
Further, it is desirable that the U-shaped or U-shaped connection auxiliary member is formed to be elastically deformable.
The lead connection portion is formed wider than the diameter of the lead, and the second portion of the connection auxiliary member is coupled to the main surface of the lead connection portion on the side where the lead is disposed. It is desirable.
In addition, the lead connection portion is formed wider than the diameter of the lead, the second portion of the connection auxiliary member is formed in a U shape or a U shape, and a main surface of a pair of the lead connection portions. It is desirable to be coupled to both.
The cylindrical base body preferably has a slit extending from one end to the other end.
Further, it is desirable that the cylindrical base body has one or a plurality of slits extending from the one end in the axial direction of the lead and having a length not reaching the other end.
The lead connecting portion is formed in a cylindrical body having a smaller diameter than the cylindrical base body and disposed coaxially with the cylindrical base body, and the lead is inserted into the cylindrical body. It is desirable to do.
Furthermore, it has an extension part which extends in the axial direction of the lead from the cylindrical base body, and the extension part is formed so as to cover at least a part of the lead connection part in the circumferential direction of the lead. It is desirable that
Moreover, it is desirable that the cylindrical base body has a portion protruding inward, and the protruding portion is in contact with the outer peripheral surface of the glass tube.
Moreover, it is desirable that the protruding portion of the base body is a protrusion or a spring piece that can be elastically deformed.
Furthermore, it is possible to provide a protrusion fixed to the outer peripheral surface of the glass tube and formed of a material different from that of the glass tube.
Furthermore, it is possible to provide a protrusion fixed to the inner peripheral surface of the base body and formed of a material different from that of the base body.
Moreover, the protrusion which protrudes from the outer peripheral surface of the said glass tube can be provided.
Furthermore, it is possible to provide a heat insulating layer that is disposed at least at a part between the glass tube and the base body and is formed of a material having lower thermal conductivity than the base body.
A pair of electrodes; a glass tube surrounding the pair of electrodes; and a pair of leads connected to the pair of electrodes and led out from both ends of the glass tube to the outside of the glass tube, respectively In a light source device in which a plurality of discharge lamps each having a discharge tube and a base attached to the discharge tube are arranged, the base of each discharge lamp includes a cylindrical base body covering one end portion of the glass tube, A lead connection part electrically connected to the lead, and a connection provided between the lead connection part and the base body for electrically and mechanically connecting the lead connection part to the base body A first portion disposed in contact with the lead and opposed to the lead connecting portion via the lead, and electrically connected to the lead connecting portion without the lead. And mechanically It is desirable to have a second portion that is engaged.

Since the electrical and mechanical connection between the lead and the lead connection part of the discharge lamp according to the present invention is achieved by using the connection auxiliary member, it is stronger than the conventional connection using only the lead and the lead connection part. High reliability.

  Next, a base according to an embodiment of the present invention, a discharge lamp with a base attached thereto, and a light source device will be described with reference to the drawings.

  First, a base, a discharge lamp, and a light source device according to Embodiment 1 of the present invention will be described with reference to FIGS. The discharge lamp 10 according to the first embodiment is shown in FIGS. 2 to 7, the base 11 used in the discharge lamp 10 is shown in FIGS. 8 to 10, and the enlarged connection auxiliary member 19 is shown in FIG. FIG. 12 shows the enlarged lead connecting portion 13 and the connecting portion 14, FIG. 13 shows a part of the light source device 30, and FIG. 14 shows the discharge lamp 10 attached to the connector 31.

As shown in FIGS. 2 to 7, the discharge lamp 10 includes an assembly of a discharge tube 1, a base 11, and a connection auxiliary member 19. A discharge tube 1 constituting the discharge lamp 10 of Example 1 is configured in the same manner as that indicated by the same reference numeral in FIG. 1, and surrounds a pair of electrodes 2 and 3 and is a cylindrical glass tube in which mercury is enclosed. 4, a phosphor layer 5 formed on the inner wall of the glass tube 4, and a pair of leads 6 and 7 led out linearly in the axial direction of the glass tube 4 from the ends of the pair of glass tubes 4. . 2, 3 and 6, only a part of the discharge lamp 10 is shown to simplify the illustration, and only one base 11 connected to one lead 6 is shown. 2. Another base having the same configuration as the base 11 shown in FIGS. 2, 3 and 6 is connected to the other lead 7 which is not shown in FIGS.
It is also possible to connect bases having different configurations to the pair of leads 6 and 7 of the discharge tube 1.

  As is clear from FIGS. 8 to 10 showing only this, the base 11 is a metallic cylindrical base body 12 having an inner diameter into which the glass tube 4 can be inserted, and a lead connecting portion connected to the lead 6. 13, a connecting portion 14 that electrically and mechanically couples the lead connecting portion 13 to the base body 12, and a protruding piece 15 for limiting the position of the discharge tube 1. The base 11 is formed, for example, by pressing a metal plate having a thickness of 0.3 mm made of phosphor bronze whose surface is plated with nickel. Of course, the base 11 can also be formed of another metal plate (for example, a copper alloy plated with gold). In addition, the base 11 can be formed by separately forming at least one of the base body 12, the lead connection portion 13, and the connecting portion 14 and joining them together by welding or the like.

The base body 12 is used to electrically and mechanically couple the discharge lamp 10 to the connector 31 shown in FIG. 14, and to insert the cylindrical glass tube 4, the outer diameter of the glass tube 4 (for example, It is formed in a cylindrical shape having an inner diameter (for example, 4.6 mm) larger than 4.4 mm). However, the base body 12 of the first embodiment has a slit 16 that extends in the axial direction and extends from one end surface 23 to the other end surface 24 of the base body 12 as apparent from FIG. As is apparent, there are three protrusions 17 protruding inward. Accordingly, the base body 12 is not a complete cylinder but a cylinder having slits 16 and protrusions 17. The width of the slit 16 in the circumferential direction of the base body 12 is, for example, 0.2 mm, and is less than one tenth of the circumference of the base body 12, so that the base body 12 has a shape that can be regarded as a cylinder as a whole. In the present application, a cylindrical or cylindrical base body means both having a slit 16 and not having a slit 16. Since the base body 12 has the slit 16, the base body 12 can be elastically deformed in this radial direction. The length of the base body 12 in the axial direction is, for example, 7 mm, and is determined so as to cover one end portion of the glass tube 4 from the end portion 18 of the glass tube 4 to the right end of one electrode 2 as apparent from FIG. ing. However, the axial length of the base body 12 can be changed to be shorter or longer than that in FIG. The outer peripheral surface of the base body 12 is used for electrically and mechanically coupling the discharge lamp 10 to the connector 31 shown in FIG.

Three projections 17 provided on the base body 12 most clearly shown in FIGS. 4 and 5 project in a hemispherical shape or a truncated cone shape on the radially inner side of the base body 12, and the outer peripheral surface of the glass tube 4. It is formed so as to have elasticity and contact. The height of the protrusion 17 protruding from the base body 12 is determined so that the glass tube 4 can be inserted into the base body 12 and the base body 12 can elastically hold the glass tube 4. 0.15 mm. Further, the diameter of the protrusion 17 in a plan view is 1 mm, for example. The protrusions 17 are formed at the same time as the die 11 is pressed. The three protrusions 17 are arranged at intervals of about 120 degrees in the circumferential direction of the base body 12. The diameter of the inscribed circle of the three protrusions 17 before inserting the glass tube 4 into the base body 12 is slightly smaller than the diameter of the glass tube 4. In a state where the glass tube 4 is inserted into the base body 12, the diameter of the inscribed circle of the three protrusions 17 is equal to the diameter of the glass tube 4 due to slight elastic deformation of the protrusion 17 and elastic deformation of the base body 12 based on the slit 16. The base body 12 is stably fitted to the glass tube 4, and the glass tube 4 is stably held by the base body 12.
Further, the base body 12 and the glass tube 4 are in contact with each other with a small area (point contact) through the protrusion 17, and the portion between the glass body 4 and the base body 12 is not provided with the protrusion 17 of the base body 12. An air layer (void) is formed in the surface. Since this air layer (gap) has a lower thermal conductivity than the protrusion 17, the thermal conduction between the glass tube 4 and the base body 12 is more effectively suppressed.
In addition, in the axial direction of the base body 12, a protrusion having the same shape or different shape as the protrusion 17 protruding in a hemispherical shape can be provided on the radial inner side of the base body 12. In this case, the circumferential positions of the plurality of protrusions at different axial positions may be the same as or different from the circumferential positions of the protrusions 17 in FIG.

The base body 12 is used for external connection of the discharge lamp 10 as is apparent from FIGS. 13 and 14. For this reason, it is necessary to connect the lead 6 of the discharge tube 11 to the base body 12. In order to achieve this object, a strip-shaped conductor having a lead connecting portion 13 for connecting the lead 6 and a connecting portion 14 for electrically and mechanically connecting the lead connecting portion 13 to the base body 12 is a base. It is derived from the main body 12.
The connecting portion 14 disposed between the lead connecting portion 13 and the base body 12 is a strip-shaped conductor having a width that is sufficiently narrower than the circumferential length (width) of the base body 12, for example, 0.5 to 1.0 mm. And has a portion led out from the base body 12 in the axial direction (horizontal direction) and a portion bent in the direction of the lead 6 with an inclination, and either the axial direction or the radial direction of the lead 6 It is also formed in such a manner that it can be slightly elastically deformed. The height of the connecting portion 14 in the radial direction of the base body 12 in FIG. 6 is lower than the distance between the base body 12 and the lead 6. 8 is deformed so as to extend in the radial direction (vertical direction) of the lead 6 instead of providing a portion having an inclination, or a portion having the inclination of the connection portion 14 in FIG. A portion extending in the radial direction (vertical direction) of the lead 6 is added between the lead connecting portion 13 or a portion extending in the axial direction (horizontal direction) of the lead 6 and the radial direction (vertical direction) of the lead 6. It is possible to sequentially provide a portion, a portion having an inclination, and a portion extending in the axial direction (horizontal direction) of the lead 6.

The lead connecting portion 13 is formed integrally with the base body 12 and the connecting portion 14. In the first embodiment, the lead connecting portion 13 has the same width as the connecting portion 14 in the axial direction (horizontal direction) of the lead 6, and the axial direction of the lead 6 It extends in the (horizontal direction). The lead connecting portion 13 can also be called an extension portion of the connecting portion 14. Of course, it is also possible to form the lead connection portion 13 with a width different from that of the connection portion 14. As is apparent from FIGS. 2 to 6, the lead connecting portion 13 is electrically and mechanically coupled to the lead 6 with a cylindrical connection auxiliary member 19.

The connection auxiliary member 19 made of a metal cylinder is in contact with the lead 6 and is disposed opposite to the lead connection portion 13 via the lead 6, and the lead connection portion without the lead 6. 13 and a lower half (second portion) that is electrically and mechanically coupled. The connection auxiliary member 19 is made of a metal plate made of nickel (Ni) plated copper (Cu), which is a material that is easily melted by heating, and has a thickness (for example, 0.2 mm) that can be plastically deformed. Is formed by. Of course, it is possible to change the thickness of the connection auxiliary member 19 or a metal material such as stainless steel or aluminum.
The lead 6 and the lead connecting portion 13 are inserted into a hole 20 penetrating from one end surface 21 to the other end surface 22 of the connection auxiliary member 19 made of a metal cylinder. Insertion of the lead 6 and the lead connection portion 13 into the hole 20 of the connection auxiliary member 19 may be press-fitting or insertion with allowance. In the case of press-fitting, the electrical and mechanical coupling between the connection assisting member 19 and the lead 6 and the lead connecting portion 13 is satisfactorily established. In this embodiment, after inserting the lead 6 and the lead connecting portion 13 into the hole 20 of the connection auxiliary member 19, the pressure in the direction in which the lead 6 and the lead connecting portion 13 are overlapped (vertical direction in FIG. 2) is applied. In addition to the connection auxiliary member 19, the connection auxiliary member 19 is plastically deformed so as to be crushed, and then the connection auxiliary member 19 is irradiated with a laser to weld the connection auxiliary member 19 to the lead 6 and the lead connection portion 13. . FIG. 4 shows the state before the connection auxiliary member 19 is plastically deformed and welded, and FIG. 5 shows the connection auxiliary member 19 ′, the lead 6 and the lead connecting portion 13 after the plastic deformation and welding. Yes. The end face 22 ′ of the connection auxiliary member 19 ′ after plastic deformation and welding in FIG. 5 is non-circular.
The lead 6 and the lead connecting portion 13 as well as the connection auxiliary member 19 can be deformed by plastic deformation (caulking) and welding.

When manufacturing the discharge lamp 10, the discharge tube 1, the base 11, and the connection auxiliary member 19 are prepared. When the base 11 is manufactured, a metal plate having a desired shape is obtained by performing known press processing on the metal plate as already described. The protrusions 17 are simultaneously formed during this pressing. Thereafter, the lead connecting portion 13 and the connecting portion 14 are formed, and a metal plate is formed into a cylindrical shape to complete the base body 12. Similarly to the base 11, the connection auxiliary member 19 is formed by processing a metal plate.

2 to 7, when the discharge lamp 10 with the cap is manufactured, the discharge tube 1 is connected to the cap 1 from the end surface 24 side opposite to the side where the lead connecting portion 13 of the cap body 12 is fixed. Insert into the body 12. Alternatively, the discharge tube 1 is fixed and the base body 12 is moved from the lead 6 side to the glass tube 4 side of the discharge tube 1 to fit the base body 12 to the glass tube 4. Alternatively, both the discharge tube 1 and the base body 12 are moved toward each other to fit the base body 12 to the glass tube 4. As described above, the diameter of the inscribed circle of the three protrusions 17 formed on the base body 12 is smaller than the diameter of the outer periphery of the glass tube 4 before the base 11 is mounted. When attached, the base body 12 is elastically deformed in the direction in which the diameter increases, and the three protrusions 17 elastically contact the glass tube 4, and the base body 12 and the glass tube 4 are fitted. .

When the base body 12 is attached to the glass tube 4, the lead 6 of the discharge tube 1 is disposed on the lead connection portion 13. Next, the lead 6 and the lead connection portion 13 are inserted into the connection auxiliary member 19. Next, at least a part of the connection auxiliary member 19 is plastically deformed by a caulking tool (not shown), and the lead 6 and the lead connection portion 13 are sandwiched by the deformed connection auxiliary member 19 ′. Establish mechanical coupling. Thereafter, the connection auxiliary member 19 ′ is irradiated with a laser to weld the connection auxiliary member 19 ′ and the lead 6 to the lead connection portion 13. As a result, direct electrical and mechanical coupling between the lead 6 and the lead connection portion 13, and indirect electrical and mechanical coupling between the lead 6 and the lead connection portion 13 via the connection auxiliary member 19 ′. Is established.
If necessary, the lead 6, the lead connecting portion 13, and the connection auxiliary member 19 ′ can be joined with a brazing adhesive (for example, solder) 100 indicated by a dotted line in FIG. 6. It is also possible to join the lead 6, the lead connecting portion 13, and the connection auxiliary member 19 with a brazing agent (for example, solder) 100 by omitting one or both of plastic deformation and welding of the connection auxiliary member 19.

2 to 7 is used as a backlight light source device 30 of a liquid crystal display device shown in FIG. 13, for example. The light source device 30 is a surface light source configured by juxtaposing a plurality of discharge lamps 10. The outer peripheral surface of the base body 12 of the base 11 at each end of each discharge lamp 10 is held by a connector 31 that can be called a metallic holder. Each connector 31 is fixed to a common fixed substrate 32, and has a pair of metal spring pieces 33 and 34 for elastically holding the base 11 as shown in FIG. Since each connector 31 is connected to a power source (not shown), when the outer peripheral surface of the base 11 of the discharge lamp 10 is brought into contact with the connector 31, a voltage is applied between the leads 6 and 7 of the discharge lamp 10, The discharge lamp 10 is turned on.

This embodiment has the following effects.
(1) Since the electrical and mechanical connection between the lead 6 and the lead connection portion 13 of the discharge lamp 10 according to the present invention is achieved by using the connection auxiliary member 19, only the lead 6 and the lead connection portion 13 are used. It is stronger and more reliable than conventional connections.
(2) The stress on the lead 6 and the lead connecting portion 13 due to plastic deformation of the connection auxiliary member 19 is smaller than the stress on the lead 6 and the lead connecting portion 13 when the conventional lead connecting portion is plastically deformed. Thereby, damage to the glass tube 4 can be reduced.
(3) The connection auxiliary member 19 has a protection function between the lead 6 and the lead connection portion 13 and can prevent damage to the lead 6 and the lead connection portion 13.
(4) Plastic deformation and welding of the connection auxiliary member 19 can be achieved more easily than conventional plastic deformation and welding of the lead connection portion.
(5) Since the connecting portion 14 between the lead connecting portion 13 and the base body 12 has a belt shape that can be elastically deformed, stress is applied to the connecting portion 14 directly or indirectly when the base 11 is attached to the discharge lamp 10. It is possible to prevent breakage of the connecting portion 14 at the time, and to prevent stress from spreading from the connecting portion 14 to the glass tube 4.
(6) Since the base body 12 has the protrusion 17 on the inner side and can be elastically deformed, the base body 12 can be easily and satisfactorily fitted to the glass tube 4, and the base body 12 and the glass tube Thus, a desired space having a heat insulating effect can be easily obtained.
(7) The protrusion 17 of the base body 12 is hemispherical, and the height of the protrusion 17 from the inner peripheral surface of the base body 12 gradually decreases toward the inlet side end face 24 of the base body 12. The glass tube 4 can be smoothly inserted into the main body 12. That is, since the projection 17 has an inclined portion that becomes lower toward the inlet side end face 24 side of the base body 12, the glass tube 4 can be smoothly inserted using the inclined portion.
(8) Since the connection auxiliary member 19 for connecting the lead 6 and the lead connection portion 13 is cylindrical, the inner periphery of the cylindrical connection auxiliary member 19 is substantially equal to the outer periphery of the lead 6. Even if 19 is crimped and plastically deformed, the connection assisting member 19 deformed to the outside of the lead 6 does not protrude so much. Therefore, when attaching the discharge lamp 10 with the base to the connector 31, the discharge lamp 10 with the base does not get in the way, and it can be attached to the connector 31 without considering the direction of the discharge lamp 10 with the base.

FIG. 15 shows the connection auxiliary member 19 ″, the lead 6, and the lead connection portion 13 ′ after the discharge lamp according to the second embodiment is plastically deformed. Since the discharge lamp according to the second embodiment is configured in the same manner as the discharge lamp 10 of FIGS. 2 to 7 except for the portion shown in FIG. 15, the illustration and description thereof are omitted. Moreover, in Example 2 and another Example mentioned later, the same referential mark is attached | subjected to the part substantially the same as FIGS. 1-14 which shows Example 1, and the description is abbreviate | omitted. Moreover, FIGS. 1-14 is referred as needed in description of Example 2 and another Example mentioned later.
In FIG. 15, the connection auxiliary member 19 ″ and the lead connection portion 13 ′ in the second embodiment are plastically deformed from the cylindrical connection auxiliary member 19 and the plate-like lead connection portion 13 that are configured in the same manner as in the first embodiment ( It is a caulking. Since the lead connection portion 13 ′ in FIG. 15 is plastically deformed (crimped) so as to surround the lead 6 similarly to the connection auxiliary member 19 ″, electrical and mechanical connection between the lead connection portion 13 ′ and the lead 6 is performed. Bonding is superior to Example 1.
It is possible to add a process for welding or brazing the auxiliary connecting member 19 ″ plastically deformed (crimped) in FIG. 15 to the lead 6 and the lead connecting portion 13 ′.
Further, instead of obtaining the lead connection portion 13 ′ curved by plastic deformation (caulking) after the connection auxiliary member 19 is attached, the lead connection portion 13 can be pre-curved before being attached to the connection auxiliary member 19. .
Since the discharge lamp according to the second embodiment is the same as the first embodiment in the basic structure, the same effect as the first embodiment can be obtained.

FIG. 16 shows a discharge lamp connection assisting member 19a according to the third embodiment. Except for the portion shown in FIG. 16 of the discharge lamp according to the third embodiment, the discharge lamp has the same configuration as the discharge lamp 10 of FIGS. The connection auxiliary member 19a in FIG. 16 has the same configuration as the connection auxiliary member 19 in FIG. 11 except that the connection auxiliary member 19a has a slit 26 extending from the one end surface 21a to the other end surface 22a. Since the connection auxiliary member 19a has the slit 26, it can be elastically deformed in this radial direction. Therefore, the diameter of the hole 20a of the connection auxiliary member 19a can be increased by elastic deformation, and the lead 6 and the lead connecting portion 13 can be easily inserted into the hole 20a. After the insertion, the lead 6 and the lead connecting portion 13 are well electrically and mechanically coupled by the elasticity of the connection assisting member 19a.
In addition, after inserting the lead 6 and the lead connection portion 13 into the hole 29a of the connection auxiliary member 19a, one selected from plastic deformation (caulking), welding, and brazing of the connection auxiliary member 19a as necessary. Or two or all steps can be added. Further, the slit 26 of FIG. 16 can be modified so that the connection auxiliary member 19a does not reach the other end surface 22a from the one end surface 21a.
Since the discharge lamp according to the third embodiment is the same as the first embodiment in the basic structure, the same effect as the first embodiment can be obtained.

FIG. 17 shows a discharge lamp connection assisting member 19b according to the fourth embodiment. Except for the portion shown in FIG. 17 of the discharge lamp according to the fourth embodiment, the discharge lamp has the same configuration as the discharge lamp 10 of FIGS. The connection auxiliary member 19b of FIG. 17 is configured in the same manner as the connection auxiliary member 19 of FIG. 11 except that the connection auxiliary member 19b has a large diameter end surface 21b and a diameter smaller than the other end surface 22b. One end surface 21 b having a large diameter of the connection auxiliary member 19 b is disposed on the insertion side of the lead 6 and the lead connection portion 13. Thereby, the lead 6 and the lead connection part 13 can be smoothly inserted into the hole 20b.
In addition, after inserting the lead 6 and the lead connecting portion 13 into the hole 20b of the connection auxiliary member 19b, one selected from plastic deformation (caulking), welding, and brazing of the connection auxiliary member 19b as necessary. Or two or all steps can be added. In FIG. 17, the connection auxiliary member 19b can be provided with a slit corresponding to the slit 26 of FIG.
Since the discharge lamp according to the fourth embodiment is the same as the first embodiment in the basic structure, the same effect as the first embodiment can be obtained.

FIG. 18 shows a state in which the lead 6 and the lead connecting portion 13 are inserted into the connection auxiliary member 19c of the discharge lamp according to the fifth embodiment. Except for the portion shown in FIG. 18 of the discharge lamp according to the fifth embodiment, the discharge lamp has the same configuration as the discharge lamp 10 of FIGS. The connection assisting member 19c of FIG. 18 is formed in a substantially square shape in cross section and has a substantially square hole 20c. The lead 6 is in contact with the upper half (first portion) of the connection assisting member 19c, and the lead connection portion 13 is in contact with the lower half (second portion). In FIG. 18, since the lead connection part 13 is in contact with the flat surface of the connection auxiliary member 19c, the electrical connection and the mechanical connection between the lead connection part 13 and the connection auxiliary member 19c are satisfactorily achieved.
In addition, after inserting the lead 6 and the lead connecting portion 13 into the connection auxiliary member 19c, one or two selected from plastic deformation (caulking), welding, and brazing of the connection auxiliary member 19c as necessary. Alternatively, the entire process can be added. Moreover, as shown by a dotted line in FIG. 18, the slit 26a can be provided in the connection auxiliary member 19c.
Since the discharge lamp according to the fifth embodiment is the same as the first embodiment in the basic structure, the same effect as the first embodiment can be obtained.

FIG. 19 shows a discharge lamp 10a according to the sixth embodiment. The discharge lamp 10a according to the sixth embodiment is configured in the same manner as the discharge lamp 10 according to the first embodiment shown in FIG. 2 except that it includes a deformed discharge tube 1a and a deformed connection auxiliary member 19d.
The deformed discharge tube 11a has the same structure as the discharge tube 11 of the first embodiment shown in FIG. 2 except that the deformed lead 6a is provided. The deformed lead 6a has a portion 27 having a circular cross section and a flat portion 28 at the tip. The deformed connection auxiliary member 19c is formed by plastic deformation (caulking) after mounting the cylindrical connection auxiliary member 19 of FIG. The deformed flat portion 28 of the lead 6a abuts on the upper portion (first portion) of the connection auxiliary member 19c, and the lower portion (second portion) of the connection auxiliary member 19c via the plate-like lead connection portion 13. A). Further, the connection assisting member 19c is laser welded to the lead 6a and the lead connecting portion 13. Therefore, the electrical and mechanical coupling between the lead 6a and the lead connecting portion 13 is achieved better than in the case of the circular lead 6 in FIG.
Since the discharge lamp 10a according to the sixth embodiment is the same as the discharge lamp 10 of the first embodiment in the basic structure, the same effect as that of the first embodiment can be obtained.
In addition, a welding process can also be omitted for cost reduction. Moreover, the process of obtaining the connection auxiliary member 19c by plastic deformation (caulking) can be omitted. If the desired electrical and mechanical connection can be achieved only by press-fitting the lead 6a and the lead connecting portion 13 of FIG. 19 into the hole 20 of the cylindrical connection auxiliary member 19 of FIG. ) The process and the welding process can be omitted. Further, the connection assisting member 19c can be welded to the lead 6a and the lead connecting portion 13 by omitting the plastic deformation (caulking) step. In addition to the plastic deformation (caulking) process and the welding process, a soldering process (for example, a soldering process) is provided, so that the connection auxiliary member 19 can be soldered to the lead 6a and the lead connection part 13. Further, instead of the connection auxiliary member 19 of FIG. 11, the connection auxiliary member 19a of FIG. 16, the connection auxiliary member 19b of FIG. 17, or the connection auxiliary member 19c of FIG. 18 is used with the lead 6a and the lead connection portion 13 of FIG. can do. Further, all or a part of the round portion 27 excluding the flat portion 28 of the lead 6a can be flat or cross-sectionally elliptical.

FIG. 20 shows a discharge lamp 10b according to the seventh embodiment. The discharge lamp 10b according to the seventh embodiment has the same configuration as the discharge lamp 10 of the first embodiment shown in FIG. 2 except that the discharge lamp 1b is deformed and the connection auxiliary member 19d is deformed.
The deformed discharge tube 1b has the same structure as the discharge tube 1 of the first embodiment shown in FIG. 2 except that it has a deformed lead 6b. The modified connection assisting member 19d shown in FIG. 20 has the same configuration as that shown in FIG. The deformed lead 6b shown in FIG. 20 includes a portion 27 having a circular cross section and a flat portion 28 at the tip, like the lead 6a shown in FIG. The flat portion 28 of the lead 6b in FIG. 20 is formed longer than that in FIG. 19 and is bent into a U-shape, and the distal end portion 28a faces the lead connection portion 13 through the connection auxiliary member 19d. That is, the lead connection portion 13 and the lower portion (second portion) of the connection auxiliary member 19d are disposed in the U-shaped portion of the lead 6b. The leading end 28a of the lead 6b is pressed against and welded to the connection assisting member 19d. Therefore, the reliability of the electrical and mechanical coupling between the lead 6b and lead connecting portion 13 of FIG. 20 and the connection auxiliary member 19d is higher than that of FIG.
Since the discharge lamp 10b according to the seventh embodiment is the same as the discharge lamp 10 of the first embodiment in the basic structure, the same effect as that of the first embodiment can be obtained.
In addition, a welding process can also be omitted for cost reduction.
Moreover, the process of obtaining the connection auxiliary member 19d by plastic deformation (caulking) can be omitted.
Further, in addition to the plastic deformation (caulking) process and the welding process, a brazing process (for example, a soldering process) is provided, and the connection auxiliary member 19d can be brazed to the lead 6b and the lead connecting part 13.
Further, in order to obtain the connection auxiliary member 19d of FIG. 20, the connection auxiliary member 19a of FIG. 16, the connection auxiliary member 19b of FIG. 17, or the connection auxiliary member 19c of FIG. Can be used.
Further, all or a part of the round portion 27 excluding the flat portion 28 of the lead 6a can be flat or cross-sectionally elliptical. Further, without providing the flat portion 28 in the lead 6b of FIG. 20, the entire lead-out portion of the lead 6b can be round in cross section and the tip can be U-shaped.
Further, the tip end portion 28a of the lead 6b can be connected to the lead connecting portion 13 without using the connection auxiliary member 19c.

FIG. 21 shows a lead 6a, a lead connecting portion 13 and a connection auxiliary member 19e of the discharge lamp according to the seventh embodiment. Except for the portion shown in FIG. 21 of the discharge lamp of the seventh embodiment, it has the same configuration as the discharge lamp 10 of the first embodiment shown in FIG. The lead 6a of the discharge tube in FIG. 21 is formed in the same manner as that indicated by the same reference numeral in FIG. The connection assisting member 19e is formed in a U-shape composed of first and second portions 41 and 42 facing each other and a connecting portion 43 thereof. The lead 6a and the lead connecting portion 13 are disposed between the first and second portions 41 and 42 of the U-shaped connection assisting member 19e, and are sandwiched between the first and second portions 41 and 42. . The connection auxiliary member 19e is formed of a metal plate, and the first and second portions 41 and 42 have a spring action before caulking and welding. A structure in which the lead 6a and the lead connecting portion 13 are sandwiched by the connection auxiliary member 19e is compressed so that the first and second portions 41 and 42 are close to each other, and the first portion 41 of the connection auxiliary member 19e and the lead 6a are compressed. A laminate of the lead connection portion 13 and the second portion 42 of the connection auxiliary member 19e is formed. Further, the connection auxiliary member 19e is welded to the lead 6a and the lead connecting portion 13. As a result, the reliability of electrical and mechanical coupling among the connection assisting member 19e, the lead 6a, and the lead connecting portion 13 is higher than that of the first embodiment shown in FIG.
In addition, a welding process can also be omitted for cost reduction. Further, the step of compressing the connection auxiliary member 19e, the lead 6a, and the lead connecting portion 13 can be omitted. Further, the connection auxiliary member 19e, the lead 6a, and the lead connecting portion 13 can be coupled by brazing (for example, soldering). Further, the connection assisting member 19e can be arranged in a state rotated 90 degrees in FIG.

FIG. 22 shows a discharge lamp 10c according to the ninth embodiment. The discharge lamp 10c according to the ninth embodiment is configured in the same manner as the discharge lamp 10 of the first embodiment shown in FIG. 2 except that it has a deformed base 11a and a deformed connection auxiliary member 19f.
The deformed base 11a has the same structure as the base 11 of the first embodiment shown in FIG. 2 except that the deformed lead connecting portion 13a is provided. As is apparent from FIG. 24, the deformed lead connecting portion 13 a is formed wider than the connecting portion 14 in the radial direction of the lead 6, and protrudes left and right from the central portion extending from the connecting portion 14. And second protrusions 55 and 56.

As is apparent from FIG. 23, the deformed connection auxiliary member 19f includes a substantially semi-cylindrical central portion (first portion) 53 having a groove 54 extending from the one end surface 21b to the other end surface 22b, and the central portion (first portion). 1 portion) 53 and first and second projecting portions (second portions) 51 and 52 projecting left and right, which are formed by pressing a metal plate. The first and second projecting portions 51 and 52 of the connection auxiliary member 19f are formed flat and joined to the first and second projecting portions 55 and 56 of the lead connection portion 13a. .

When the discharge lamp 10c of FIG. 22 is assembled, the glass tube 4 is disposed in the base body 12, the lead 6 is disposed on the lead connection portion 13a, and the connection auxiliary member 19f is disposed on the lead 6 and the lead connection portion 13a. Place on top. That is, as shown in FIG. 25, the lead 6 is arranged on the center of the lead connecting portion 13a, and the connection auxiliary member 19f is arranged so that the lead 6 is accommodated in the groove 54. At this time, the first and second projecting portions 51 and 52 of the connection auxiliary member 19f are brought into contact with the first and second projecting portions 55 and 56 of the lead connection portion 13a. Thereafter, the first and second projecting portions 51 and 52 of the connection auxiliary member 19f are welded to the first and second projecting portions 55 and 56 of the lead connecting portion 13a. Further, if necessary, the central portion 53 of the connection auxiliary member 19 f is welded to the lead 6, and the lead connection portion 13 a is welded to the lead 6. As a result, highly reliable electrical and mechanical coupling between the lead 6 and the lead connecting portion 13a is obtained.
Since the discharge lamp 10c according to the ninth embodiment is the same as the discharge lamp 10 of the first embodiment in the basic structure, the same effect as that of the first embodiment can be obtained.
Before the welding process of the connection auxiliary member 19f to the lead 6 and the lead connection portion 13a, the connection auxiliary member 19f is crimped to the lead connection portion 13a, or the connection auxiliary member 19f is directly crimped to the lead connection portion 13a. A step of crimping via the lead 6 can be provided. Thereby, the mutual coupling of the connection assisting member 19f, the lead 6, and the lead connecting portion 13a is further strengthened. Further, instead of or in addition to a welding process involving a welding process or a crimping process, a brazing (for example, soldering) process for mutually connecting the connection auxiliary member 19f, the lead 6, and the lead connecting portion 13a is provided. Can do.
Note that the lead 6 in FIG. 22 can be formed to correspond to the flat portion 28 in FIG. In this case, the groove 54 shown in FIG. 23 can be deformed into a shape corresponding to the flat portion 28.

FIG. 26 shows the lead 6 of the discharge lamp according to the tenth embodiment, the deformed lead connecting portion 13a, and the deformed connection auxiliary member 19g. Except for the portion shown in FIG. 26 of the discharge lamp of the tenth embodiment, it has the same configuration as the discharge lamp 10 of the first embodiment shown in FIG. 26 is formed in the same manner as that shown in FIG. 23, and has first and second protrusions 55 and 56.
The deformed connection auxiliary member 19g is connected to the connection auxiliary member 19f having the central portion (first portion) 53 and the first and second projecting portions 51 and 52 shown in FIGS. Two holding parts 57 and 58 are added. The first and second holding portions 57 and 58 to which the connection auxiliary member 19g is added are connected to the first and second projecting portions 51 and 52 and cover a part of the side surface and the lower surface of the lead connection portion 13a. In addition, it has a spring property that can be displaced in a direction in which the distance between the first and second projecting portions 51 and 52 is increased. Accordingly, the first and second protrusions 55 and 56 of the lead connection portion 13a are connected to the first and second projecting portions 51 and 52 of the connection auxiliary member 19g and the first and second holding portions 57 and 58, respectively. Is sandwiched between. Further, the first and second projecting portions 51 and 52 and the first and second holding portions 57 and 58 of the connection auxiliary member 19g are connected to the first and second projecting portions 55 and 56 of the lead connecting portion 13a. Welded. As a result, the reliability of electrical and mechanical coupling between the connection assisting member 19g, the lead 6, and the lead connecting portion 13a is higher than that of the ninth embodiment shown in FIGS.

A base 11b for use in the discharge lamp 10d according to the eleventh embodiment shown in FIG. 28 is shown in FIG. 27 has a deformed base body 12a, a deformed lead connecting portion 63, and a deformed connecting portion 62. The deformed base 11b shown in FIG. The deformed base body 12a has three slits 63 extending from the open end surface 60 in the direction of the connecting portion 62, and does not have the one corresponding to the protrusion 17 of the base 11 shown in FIG. The base body 12 a has a spring property that can be elastically deformed in the direction in which the diameter increases by the action of the three slits 63. The inner diameter before attaching the base body 12 a to the glass tube 4 is the same as the glass tube 4 or slightly smaller than the glass tube 4. When the glass tube 4 is attached to the base body 12a, the base body 12a is elastically deformed in the direction of increasing its diameter, and the outer peripheral surface of the glass tube 4 is in close contact with the inner peripheral surface of the base body 12a as shown in FIG.
The number of slits 63 in the base body 12a can be increased or decreased. Moreover, what corresponds to the slit 16 shown in FIG. 10 can also be provided in the base body 12a of FIG.

The lead connection portion 63 shown in FIG. 28 is formed of a cylindrical body having a smaller diameter than the cylindrical base body 12a and disposed coaxially with the cylindrical base body 12a. A lead 6 is inserted into 63. The lead connecting portion 63 is formed of a plastically deformable metal plate. The lead 6 and the lead connecting portion 63 are covered with a connection auxiliary member 19h having a U-shaped cross-sectional shape. The connection auxiliary member 19 h is a cylinder having a bottom surface, and the bottom surface is in contact with the end surface of the lead 6. The connection auxiliary member 19h and the lead connection portion 63 are compressed in a direction in which their diameters are reduced and plastically deformed. Accordingly, the connection auxiliary member 19 h is in pressure contact with the lead connection portion 63, and the lead connection portion 63 is in pressure contact with the lead 6. Further, the lead 6 and the lead connecting portion 63, the connection auxiliary member 19h and the lead connecting portion 63, and the connection auxiliary member 19 and the lead 6 are welded. Therefore, the reliability of electrical and mechanical coupling among the lead 6, the lead connecting portion 63, and the connection auxiliary member 19 is high.
The connection auxiliary member 19h is transformed into the connection auxiliary member 19 in FIG. 11, the connection auxiliary member 19a in FIG. 16, the connection auxiliary member 19b in FIG. 17, the connection auxiliary member 19c in FIG. 18, the connection auxiliary member 19e in FIG. can do.

The connecting portion 62 between the lead connection portion 63 and the cylindrical base body 12a of FIG. 28 also serves as a lid on the end surface opposite to the open end 60 of the cylindrical base body 12a. 28, the connecting portion 62 and the lead connecting portion 63 are continuously formed of the same metal plate as the base body 12a. However, the connecting portion 62 and the lead connecting portion 63 are different from the base body 12a. It can be formed from a metal plate and then integrated by welding or conductive adhesive. Further, the lead connecting portion 63 can be formed of a metal plate different from the connecting portion 62, and then integrated by welding or a conductive adhesive. Moreover, the connection part 62 can also be made into a some strip | belt-shaped body without making it a lid | cover type. In addition, one or a plurality of openings can be provided in the connecting portion 62.

FIG. 29 shows a discharge lamp 10e according to the twelfth embodiment. The discharge lamp 10e according to the twelfth embodiment is configured in the same manner as the discharge lamp 10 of the first embodiment shown in FIG. 2 except that it has a deformed base 11c.
The deformed base 11c has a long slit 16 extending from one end surface 24 to the other end surface 23 of the base body 12b indicated by a dotted line as in the case of the base 11 of FIG. 4, and from the one end surface 24 to the other end surface 23 of the base body 12b. Other than having two additional short slits 71 which are not reached, they are configured in the same manner as the base 11 shown in FIGS. 29, one of the two slits 71 in FIG. 29 is formed at an angular position of 120 degrees, and the other is formed at an angular position of 240 degrees. Accordingly, the protrusions 17 are disposed between the slit 16 and one of the two slits 71, between the slit 16 and the other of the two slits 71, and between the two slits 71, respectively. Three portions (wing-shaped portions) of the base body 12b defined by the long slit 16 and the two short slits 71 are easily elastically deformed in the direction in which the diameter increases. As a result, the glass tube 4 can be smoothly inserted into the base body 12b.
Since the discharge lamp 10e according to the twelfth embodiment is the same as the discharge lamp 10 of the first embodiment in the basic structure, the same effects as the first embodiment can be obtained.
29, the connection auxiliary member 19 ″ in FIG. 15, the connection auxiliary member 19a in FIG. 16, the connection auxiliary member 19b in FIG. 17, the connection auxiliary member 19c in FIG. 18, and the connection auxiliary in FIG. It can be replaced with the member 19d, the connection auxiliary member 19e of FIG. 21, the connection auxiliary member 19f of FIG. 22, the connection auxiliary member 19g of FIG.

FIG. 30 shows a discharge lamp 10f according to the thirteenth embodiment. The discharge lamp 10f according to the thirteenth embodiment is configured in the same manner as the discharge lamp 10 of the first embodiment shown in FIG. 2 except that it has a deformed base 11d.
The deformed base 11d has the same structure as the base 11 shown in FIGS. 2 to 10 except that the deformed base body 12c and the extension 80 are provided. The deformed base body 12c does not have an open end surface corresponding to the other end surface 23 of FIG. The base body 12c and the extension 80 are partitioned by a chain line passing through the end 18 of the glass tube 4 shown in FIG. The extension portion 80 has a function of protecting the lead connection portion 13 and the connection auxiliary member 19, and is formed in a cylindrical shape like the base body 12 c, and at least the lead connection portion 13 and the connection auxiliary member 19 in the circumferential direction of the lead 6. It is formed so as to cover a part. In FIG. 30, the extension 80 projects to the left of the lead 6 with the end 18 of the glass tube 4 as a reference. However, it can be deformed so as to cover 20% or more of the lead connecting portion 13 in the axial direction of the lead 6. Thus, if it covers 20% or more, protection of the lead connection part 13 can be achieved.
The extension 80 is provided with openings 81 and 82 each having a pair of notches for easily achieving plastic deformation (caulking) and welding of the connection auxiliary member 19. Plastic deformation (caulking) and welding are performed through a pair of openings 81,82. The openings 81 and 82 can be holes. Further, one of the pair of openings 81 and 82 can be omitted. Further, an opening corresponding to the openings 81 and 82 can be additionally provided.
The extension part 80 of the base body 12c prevents abnormal stress from being applied to the lead connection part 13 and the connection auxiliary member 19 during or after the manufacturing process of the discharge lamp 10f. Thereby, damage to lead connection part 13, connection auxiliary member 19, glass tube 4, etc. can be prevented.
Since the discharge lamp 10f according to the thirteenth embodiment is the same as the discharge lamp 10 of the first embodiment in the basic structure, the same effects as the first embodiment can be obtained.
30, the connection auxiliary member 19 ″ of FIG. 15, the connection auxiliary member 19a of FIG. 16, the connection auxiliary member 19b of FIG. 17, the connection auxiliary member 19c of FIG. 18, and the connection auxiliary of FIG. It can be replaced with the member 19d, the connection auxiliary member 19e of FIG. 21, the connection auxiliary member 19f of FIG. 22, the connection auxiliary member 19g of FIG.
Further, the base body 12c of FIG. 30 can be replaced with the base body 12a of FIG. 27, the base body 12b of FIG.

31 shows a discharge lamp 10g according to Example 14, FIG. 32 shows a discharge tube 1c used in the discharge lamp 10g of FIG. 31, and FIG. 33 shows a DD cross section of FIG.
As apparent from FIGS. 32 and 33, three hemispherical protrusions 17 a are provided on the outer peripheral surface of the glass tube 4. The three protrusions 17a on the outer peripheral surface of the glass tube 4 are arranged at the same angular positions as the three protrusions 17 of the base body 12 shown in FIG. Each protrusion 17a is formed by printing (applying) a paste (ink) made of a resin (preferably polyimide), which is a different material from the glass tube 4, on the outer peripheral surface of the glass tube 4, and baking or drying the paste. . Note that the protrusion 17a can be formed by sticking a tape having a predetermined shape made of resin (preferably polyimide) to the outer peripheral surface of the glass tube 4 instead of printing. The shape of each protrusion 17a is preferably a hemispherical shape or a truncated cone shape in order to facilitate the insertion of the glass tube 4 into the base 11e. However, the cross-sectional shape and planar shape of each protrusion 17a can be variously modified, for example, can be deformed into a truncated pyramid shape, a cylindrical shape, a prismatic shape, or the like.
The height of each protrusion 17a is determined so that each protrusion 17a contacts the inner peripheral surface of the base body 12d when the glass tube 4 is inserted into the base 11e.

The base 11e has the same configuration as the base 11 shown in FIGS. 2 to 10 except for the base body 12d. The base body 12d is configured in the same manner as the base body 12 shown in FIGS.
Each projection 17a of the fourteenth embodiment contributes to making a space for heat insulation between the base body 12d and the glass tube 4 in the same manner as each projection 17 of the first embodiment. Further, each projection 17a is hemispherical, and its thickness gradually decreases toward the inlet side end face 24 of the base body 12d, so that the glass tube 4 can be smoothly inserted into the base body 12d.
Since the discharge lamp 10g according to the fourteenth embodiment is the same as the discharge lamp 10 according to the first embodiment in the basic structure, it has the same effect as the first embodiment.
31 is replaced with the connection auxiliary member 19 ″ of FIG. 15, the connection auxiliary member 19a of FIG. 16, the connection auxiliary member 19b of FIG. 17, the connection auxiliary member 19c of FIG. 18, and the connection auxiliary of FIG. It can be replaced with the member 19d, the connection auxiliary member 19e of FIG. 21, the connection auxiliary member 19f of FIG. 22, the connection auxiliary member 19g of FIG.
Further, the base body 12d shown in FIG. 31 can be replaced with a base body 12a shown in FIG. 27 or a base body 12b shown in FIG.
Further, the protrusion 17a can be formed in a material or shape that is more easily elastically deformed than the base body 12d.
Moreover, the thing similar to the processus | protrusion 17a can be arrange | positioned in the multiple places of the axial direction of the glass tube 4. FIG.
Further, the three protrusions 17a can be formed to have different shapes or different elasticity without being formed identically. For example, two of the three protrusions 17a may be formed into a material or shape that is difficult to elastically deform, and the remaining one may be formed into a material or shape that is more easily elastically deformed than the protrusion 17a that is difficult to elastically deform. it can. Thereby, the protrusion 17a of the material or shape which is hard to be elastically deformed contributes to the positioning of the glass tube 4 with respect to the base body 12d.
Further, instead of forming the protrusion 17a in a hemispherical shape, it can be formed in a uniform thickness.
Further, instead of the three protrusions 17a, a protruding portion surrounding the outer peripheral surface of the glass tube 4 in a band shape can be provided. Further, a plurality of projecting portions surrounding the belt can be arranged in the axial direction of the glass tube 4.

FIG. 34 shows a discharge lamp 10h according to the fifteenth embodiment. The discharge lamp 10h in FIG. 34 is configured in the same manner as the discharge lamp 10 in the first embodiment in FIG. 2 except that it has a deformed base 11f.
The deformed base 11f shown in FIG. 34 has the same configuration as the base 11 shown in FIGS. 2 to 10 except that the deformed base body 12e and the deformed protrusion 17b are included. The deformed base body 12e shown in FIG. 34 corresponds to the base body 12 shown in FIGS. 2 to 10 except that the projection 17 is omitted, and the other parts are formed in the same manner as the base body 12 shown in FIGS. ing.
The deformed protrusion 17b of FIG. 34 is not formed of the same metal plate as the base body 12e, but is formed of a resin (preferably polyimide) which is a different material from the base body 12e. The protrusion 17b is formed by printing (applying) a resin (preferably polyimide) paste (ink) on the outer peripheral surface of the glass tube 4 on a metal plate before forming the base body 12e into a cylinder, and baking or drying it. ing. Instead of printing, the protrusion 17b can be formed by sticking a tape of a predetermined shape made of resin (preferably polyimide) to a metal plate for the base body 12e.
The three protrusions 17b formed on the base body 12e are arranged at the same angular positions as the three protrusions 17 of the base body 12 shown in FIG. The shape of each projection 17b is preferably a hemispherical shape or a truncated cone shape in order to facilitate the insertion of the glass tube 4 into the base body 12e. However, the cross-sectional shape and planar shape of each protrusion 17b can be variously modified, for example, can be deformed into a truncated pyramid shape, a columnar shape, a prismatic shape, or the like.
The height of each projection 17b is determined so that each projection 17b contacts the glass tube 4 when the glass tube 4 is inserted into the base 11f.

The protrusions 17b of the fifteenth embodiment contribute to creating a heat insulating gap between the base body 12e and the glass tube 4 in the same manner as the protrusions 17 of the first embodiment. Since the protrusion 17b is formed without metal processing, the protrusion 17b can be easily manufactured.
Since the discharge lamp 10h according to the fifteenth embodiment is the same as the discharge lamp 10 according to the first embodiment in the basic structure, it has the same effect as the first embodiment.
The protrusions 17b can be formed in a material or shape that is more easily elastically deformed than the base body 12e.
Moreover, the same thing as the processus | protrusion 17b can be arrange | positioned in the multiple places of the axial direction of the lead | read | reed 6.
Further, the three protrusions 17b can be formed to have different shapes or different elasticity without forming the same. For example, two of the three protrusions 17b are formed in a material or shape that is hardly elastically deformed, and the remaining one is formed in a protrusion of a material or shape that is more easily elastically deformed than the protrusion that is not easily elastically deformed. Can do. Thereby, the protrusion which is hard to be elastically deformed contributes to the positioning of the glass tube 4 with respect to the base body 12e.
Further, the base body 12e shown in FIG. 34 can be replaced with a base body 12a shown in FIG. 27, a base body 12b shown in FIG.
Further, instead of forming the protrusion 17b in a hemispherical shape, it can be formed in a uniform thickness.
Further, instead of the three protrusions 17b, a ring-shaped protrusion can be provided on the inner peripheral surface of the base body 12a. A plurality of the ring-shaped protrusions can be arranged in the axial direction of the base body 12a.

FIG. 35 shows a discharge lamp 10i according to the sixteenth embodiment. The discharge lamp 10i shown in FIG. 35 has the same configuration as that of the discharge lamp 10 according to the first embodiment shown in FIG. 2 except that it includes a deformed discharge tube 1e and a deformed base 11e.
The deformed discharge tube 1e is configured in the same manner as the discharge tube 1 of the first embodiment shown in FIG. 2 except that the deformed glass tube 4a is included. The deformed glass tube 4a has the same configuration as the glass tube 4 of the first embodiment shown in FIG. The projections 17c of the glass tube 4a have substantially the same shape as the projections 17a made of resin in FIG. 33 and are arranged at substantially the same position, and three are provided for one base 11e.
The deformed base 11e shown in FIG. 34 is formed in the same manner as that shown by the same reference numeral in FIG. Therefore, the projection 17c in FIG. 35 has the same function as the projection 17a in FIG. 33, and creates a heat insulating gap between the glass tube 4a and the base 11e.

The discharge lamp 10i according to the sixteenth embodiment has the same effects as the first embodiment because the basic structure is the same as the discharge lamp 10 of the first embodiment.
In addition, the thing similar to the processus | protrusion 17c can be arrange | positioned in the several places of the axial direction of the lead | read | reed 6. Also, one or more of the three protrusions 17c can be replaced with the protrusion 17a made of the resin shown in FIG. Further, the three protrusions 17c can be formed in different shapes without being formed identically.
Further, instead of forming the protrusion 17c in a hemispherical shape, it can be formed to have another cross section such as a trapezoidal shape.
Further, instead of the three protrusions 17c, a ring-shaped protrusion can be provided on the outer peripheral surface of the glass tube 4a. A plurality of the ring-shaped protrusions can be arranged in the axial direction of the glass tube 4a.

36 shows a discharge lamp 10j according to the seventeenth embodiment, FIG. 37 shows a discharge tube 1f used in the discharge lamp 10j of FIG. 36, and FIG. 38 shows a cross section taken along line EE of FIG. The discharge lamp 10j shown in FIG. 36 has the same configuration as the discharge lamp 10 of the first embodiment shown in FIG. 2 except that it includes a deformed discharge tube 1f and a deformed base 11e. The deformed discharge tube 1f is configured in the same manner as the discharge tube 1 of the first embodiment shown in FIG. 2 except that a resin heat insulating layer 90 is provided. The heat insulating layer 90 is formed by applying a foamed resin having a lower thermal conductivity than the base 11e to a portion of the glass tube 4 covered with the base 11e. The heat insulating layer 90 has greater elasticity than the glass tube 4.
The base 11e shown in FIG. 36 is formed in the same manner as that shown by the same reference numeral in FIG. 31, and does not have a portion corresponding to the protrusion 17 of the base 11 shown in FIG.

When the glass tube 4 with the heat insulating layer 90 is inserted into the cylindrical base body 12e, the heat insulating layer 90 is disposed between the glass tube 4 and the base body 12e as shown in FIG. It becomes difficult to be transmitted to the base body 12e, and the temperature in the vicinity of the electrode 2 is stabilized.
The discharge lamp 10j according to the thirty-sixth embodiment has the same effects as the first embodiment because the basic structure is the same as the discharge lamp 10 of the first embodiment.
36, the connection auxiliary member 19 ″ in FIG. 15, the connection auxiliary member 19a in FIG. 16, the connection auxiliary member 19b in FIG. 17, the connection auxiliary member 19c in FIG. 18, and the connection auxiliary in FIG. It can be replaced with the member 19d, the connection auxiliary member 19e of FIG. 21, the connection auxiliary member 19f of FIG. 22, the connection auxiliary member 19g of FIG.
In addition, the base body 12e of FIG. 36 can be replaced with a base body 12a having the slit 63 of FIG. 27, or the base body 12b of FIG.
Moreover, the heat insulation layer 90 can be provided to the edge part of the glass tube 4, as shown by the chain line in FIG.
Further, the heat insulating layer 90 can be provided by being divided into a plurality of parts in the axial direction of the glass tube 4.
Moreover, the heat insulation layer 90 can be provided by immersing the glass tube 4 in the resin solution. Further, the heat insulating layer 90 can be formed by winding an adhesive sheet made of a heat insulating material around the glass tube 4.
Further, in the discharge lamp having projections as shown in FIGS. 2, 29, 31, 34, 35, 36, etc., it is the same as the heat insulating layer 90 of FIG. 36 on the outer peripheral surface of the glass tube 4 where the projections are not arranged. Things can be placed.

FIG. 39 shows a discharge lamp 101 according to the seventeenth embodiment. The discharge lamp 10l shown in FIG. 39 has the same structure as the discharge tube 1 of the first embodiment shown in FIG. 2 except that it has a deformed base 11i and a covering layer 90a made of a heat insulating material. The deformed base 11i is formed in the same manner as that indicated by the same reference numeral in FIG. 31, and does not have the one corresponding to the protrusion 17 of the base 11 in FIG. However, the heat insulating layer 90a is attached to the inner peripheral surface of the base body 12e of FIG. The heat insulating layer 90a in FIG. 39 is made of the same material as the heat insulating layer 90 in FIG.

When the glass tube 4 is inserted into the base body 12e with the heat insulating layer 90, the heat insulating layer 90a is disposed between the glass tube 4 and the base body 12e, and the heat of the glass tube 4 is not easily transmitted to the base body 12e. The temperature in the vicinity of 2 is stabilized.
The discharge lamp 10l according to the embodiment 39 is the same as the discharge lamp 10 of the embodiment 1 in the basic structure, and therefore has the same effect as the embodiment 1.
39, the connection auxiliary member 19 ″ in FIG. 15, the connection auxiliary member 19a in FIG. 16, the connection auxiliary member 19b in FIG. 17, the connection auxiliary member 19c in FIG. 18, and the connection auxiliary in FIG. It can be replaced with the member 19d, the connection auxiliary member 19e of FIG. 21, the connection auxiliary member 19f of FIG. 22, the connection auxiliary member 19g of FIG.
Further, the base body 12e of FIG. 39 can be replaced with a base body 12a having the slit 63 of FIG. 27, a base body 12b of FIG. Further, the heat insulating layer 90 a made of a heat insulating material can be divided into a plurality of pieces in the axial direction of the glass tube 4. Alternatively, the heat insulating layer 90a can be formed by sticking an adhesive sheet made of a heat insulating material to a metal plate before the base body 12b is formed into a cylinder.

FIG. 40 shows a part of a discharge lamp 10m according to the nineteenth embodiment. The discharge lamp 10m of FIG. 40 is configured in the same manner as the discharge lamp 10 according to the first embodiment, except that it has a deformed base 11f. 40 is the same as the base 11 according to the first embodiment except that a base body 12f having a plurality of elastic holding pieces 17d is provided instead of the three protrusions 17 shown in FIG. Yes. The elastic holding piece 17d in FIG. 40 is a spring piece having a tip protruding inward of the cylindrical base body 12f, holds the glass tube 4 in contact with the outer peripheral surface of the glass tube 4, and is a protrusion shown in FIG. Functions in the same way as 17.
In addition, both the protrusion 17 shown in FIG. 7 etc. and the elastic holding piece 17a of FIG. 21 can be arrange | positioned in the circumferential direction of the nozzle | cap | die main body 12f.
Further, the elastic holding piece 17a can be transformed into various shapes of elastic holding pieces having functions equivalent to this. For example, the elastic holding piece 17a is indicated by reference numeral 54 in FIG. 6 of WO2008 / 001562 (patent document 2), indicated by reference numerals 54A and 54B in FIG. 19, and indicated by reference numerals 138A and 138B in FIG. Can be replaced.

FIG. 41 shows a cross section of a discharge lamp 10n according to Example 41. The discharge lamp 10n shown in FIG. 41 is configured in the same manner as the discharge lamp 10 according to the first embodiment except that it has a deformed base 11k. 41 has the same structure as the base 11 according to the first embodiment, except that a base body 12g having a deformed slit 16a is provided. The deformed base body 12g is different from the base body 12 of the first embodiment in that the end portions 91 and 92 facing each other through the slit 16a are slightly bent inside the base body 12g. This is the same as the base body 12 of the first embodiment. When the base body 12g is configured as shown in FIG. 41, even if burrs, that is, minute protrusions are generated in the portion adjacent to the slit 16a of the base body 12g due to pressing, the burrs are removed from the circumscribed circle of the base body 12g. 14 and when the discharge lamp 10n is attached to the connector 31 shown in FIG.
It should be noted that in embodiments other than the embodiment 1, the same one as the base body 12g of FIG. 41 can be provided.

FIG. 42 shows a cross section of the discharge lamp 10o according to the twenty-first embodiment. The discharge lamp 10o in FIG. 42 is configured in the same manner as the discharge lamp 10 according to the first embodiment except that it has a deformed base 11l. 42 is the same as the base 11 according to the first embodiment except that a deformed base body 12h is provided. The base body 12h of FIG. 42 is configured the same as the base body 12 of the first embodiment, except that the slit body 16 in the base body 12 of the first embodiment is not provided. Accordingly, the base body 12h in FIG. 42 is a cylindrical body without a slit.
The base body 12h of FIG. 42 can also be provided in Examples 2 to 20 other than Example 1.

The present invention is not limited to the above-described embodiments, and for example, the following modifications are possible.
(1) The connection auxiliary member of the present invention can be used for another discharge tube having a shape similar to this other than the baseless cold cathode fluorescent discharge tube 1 shown in FIG.
(2) The glass tube 4 or its end can be transformed into another shape other than a cylindrical shape, for example, a cylindrical shape such as a quadrangular cross-sectional shape.
(3) In each of the embodiments, one, two, or all selected from the pressure welding, welding, and brazing of the connection auxiliary member to the lead and the lead connecting portion can be performed.
(4) Welding is not limited to laser welding, but may be other than spot welding, for example.
(5) Although the base body 12a is in contact with the outer peripheral surface of the glass tube 4 in FIG. 28, the diameter of the base body 12a may be slightly increased to separate the glass tube 4 from the base body 12a. In this case, the base 11 b is held in the discharge tube 1 by the combination of the lead 6 and the lead connecting portion 63. In FIG. 28, the base body 12 a can be brought into contact with only the end portion of the glass tube 4, and a part of the base body 12 a on the open end 61 side can be separated from the glass tube 4.
(6) A base similar to the rib-shaped large-diameter portion 53 and the rib-shaped contact portion 52 shown in FIG. 1 of WO2008 / 001562 (Patent Document 2) may be provided on the base body of each embodiment. it can.
(7) A protective piece 55 similar to the protective piece 55 shown in FIG. 1 of WO2008 / 001562 (Patent Document 2) can be provided near the connecting portion (leading piece) of the base of each embodiment. Moreover, the same thing as the front stop piece 56 shown by FIG. 1 of patent document 2 can be provided in the nozzle | cap | die of each Example.
(8) The discharge lamp can be configured to include a plurality or all of the characteristic configurations of each embodiment.
(9) The lead connecting portion and the connecting portion of the base of each embodiment can be formed separately from the base body and then electrically and mechanically coupled to the base body. In addition, the lead connection can be formed separately from the connecting portion, and then electrically and mechanically coupled to the connecting portion.
(10) The structure in which the base body 12 is fixed to the glass tube 4 via the protrusion 19 is made of an elastic holding piece disclosed in WO2008 / 001562 (Patent Document 2) or a similar structure. Can be replaced.

It is sectional drawing which shows the nozzleless discharge tube used in each Example. It is a front view which shows a part of discharge lamp according to Example 1 of this invention in the state before plastically deforming a connection auxiliary member. It is a top view which shows the discharge lamp of FIG. 2 in the state before plastically deforming a connection auxiliary member. It is a left view which shows the discharge lamp of FIG. 2 in the state before plastically deforming a connection auxiliary member. It is a left view which shows the discharge lamp of FIG. 2 in the state after plastically deforming a connection auxiliary member. It is sectional drawing which shows the discharge lamp after plastically deforming a connection auxiliary member by the AA line of FIG. It is a BB sectional view of the discharge lamp of FIG. It is a front view which shows only the nozzle | cap | die of the discharge lamp of FIG. It is a top view which shows the nozzle | cap | die of FIG. It is CC sectional view taken on the line of the nozzle | cap | die of FIG. It is an expansion perspective view which shows the connection auxiliary member of FIG. FIG. 3 is an enlarged perspective view showing a lead connecting portion and a connecting portion in FIG. 2. 1 is a plan view schematically showing a light source device according to Embodiment 1. FIG. It is sectional drawing which expands and shows a part of light source device of FIG. It is a side view of the coupling | bond part of the lead | read | reed according to Example 2, a lead connection part, and a connection auxiliary member. 6 is an enlarged perspective view showing a connection auxiliary member according to Embodiment 3. FIG. 6 is an enlarged cross-sectional view showing a connection auxiliary member according to Embodiment 4. FIG. It is sectional drawing which shows the coupling | bond part of the lead | read | reed according to Example 5, a lead connection part, and a connection auxiliary member. 10 is a plan view showing a part of a discharge lamp according to Embodiment 6. FIG. 10 is a cross-sectional view showing a part of a discharge lamp according to Example 7. FIG. It is a perspective view of the joint part of the lead according to Example 8, a lead connection part, and a connection auxiliary member. 10 is a front view showing a part of a discharge lamp according to Embodiment 9. FIG. It is an expansion perspective view which shows the connection auxiliary member of FIG. FIG. 23 is an enlarged perspective view showing a lead connection part of FIG. 22. FIG. 23 is an enlarged cross-sectional view illustrating a coupling portion between the lead, the lead connection portion, and the connection auxiliary member of FIG. 22. It is sectional drawing which shows the coupling | bond part of the lead | read | reed according to Example 10, a lead connection part, and a connection auxiliary member. It is a perspective view which shows the nozzle | cap | die according to Example 11. FIG. It is sectional drawing which shows a part of discharge lamp using the nozzle | cap | die of FIG. It is a front view which shows a part of discharge lamp according to Example 12. It is a front view which shows a part of discharge lamp according to Example 13. It is a front view which shows a part of discharge lamp according to Example 14. It is a front view which shows a part of discharge tube of FIG. FIG. 32 is a sectional view taken along line DD of the discharge lamp of FIG. 31. It is sectional drawing which shows the discharge lamp according to Example 15 similarly to FIG. It is sectional drawing which shows the discharge lamp according to Example 16 similarly to FIG. It is a front view which shows a part of discharge lamp according to Example 17. It is a front view which shows a part of discharge tube with a heat insulation layer of FIG. It is the EE sectional view taken on the line of the discharge lamp of FIG. It is a front view which shows a part of discharge lamp according to Example 18. 20 is a cross-sectional view showing a part of a discharge lamp according to Example 19. FIG. It is sectional drawing which shows a part of discharge lamp according to Example 20 similarly to FIG. It is sectional drawing which shows a part of discharge lamp according to Example 21 similarly to FIG.

Explanation of symbols

1 discharge tube 6, 7 lead 11 base 12 base body 13 lead connection part 14 connection part 19 connection auxiliary member

Claims (25)

A pair of electrodes, a glass tube surrounding the pair of electrodes, and a pair of leads respectively connected to the pair of electrodes and led out from both ends of the glass tube to the outside of the glass tube A discharge tube, a base attached to the discharge tube, and a metal connection auxiliary member for assisting the connection of the base to the lead,
The base includes a cylindrical base body covering one end portion of the glass tube, a lead connection part electrically connected to the lead, and the lead connection part electrically and mechanically to the base body. A coupling portion provided between the lead connection portion and the base body for coupling,
The connection auxiliary member is electrically and mechanically connected to the lead connection portion without the lead, and a first portion that is in contact with the lead and is disposed opposite the lead connection portion via the lead. A discharge lamp comprising: a second portion joined together. The discharge lamp according to claim 1, wherein the connection auxiliary member is electrically and mechanically coupled to the lead and the lead connecting portion with welding. The discharge lamp according to claim 1, wherein the connection auxiliary member is electrically and mechanically coupled to the lead and the lead connection portion with plastic deformation. The discharge lamp according to claim 1, wherein the connection auxiliary member is electrically and mechanically coupled to the lead and the lead connecting portion with brazing. 2. The connection auxiliary member is electrically and mechanically coupled to the lead and the lead connecting portion with two or all selected from plastic deformation, welding, and brazing. The discharge lamp described. 6. The discharge lamp according to claim 1, wherein the connection auxiliary member is formed in a cylindrical shape, and a part of the lead and the lead connection portion are arranged in the connection auxiliary member. . The discharge lamp according to claim 6, wherein the cylindrical connection auxiliary member has a slit extending in the axial direction and is elastically deformable in the radial direction. The cylindrical connection auxiliary member has one end close to the glass tube and the other end farther from the glass tube than the one end, and the opening area of the one end is that of the other end. The discharge lamp according to claim 6 or 7, wherein the discharge lamp has a larger opening area. The discharge lamp according to any one of claims 1 to 8, wherein at least a portion of the lead contacting the connection auxiliary member is a flat surface. The lead has a U-shaped or U-shaped tip, and the lead connecting portion and the second portion of the connection auxiliary member are disposed in the U-shaped or U-shaped tip. The discharge lamp according to claim 1. The connection auxiliary member is formed in a U shape or a U shape, and a part of the lead and the lead connection portion are arranged in the U shape or the U shape connection auxiliary member. The discharge lamp according to claim 1. The discharge lamp according to claim 11, wherein the U-shaped or U-shaped connection auxiliary member is formed to be elastically deformable. The lead connecting portion is formed wider than the diameter of the lead, and the second portion of the connection auxiliary member is coupled to the main surface of the lead connecting portion on the side where the lead is disposed. The discharge lamp according to claim 1. The lead connection portion is formed wider than the diameter of the lead, and the second portion of the connection auxiliary member is formed in a U shape or a U shape and is formed on both main surfaces of the pair of lead connection portions. 2. The discharge lamp according to claim 1, wherein the discharge lamp is combined. The discharge lamp according to any one of claims 1 to 14, wherein the cylindrical base body has a slit extending from one end to the other end. 16. The cylindrical base body has one or a plurality of slits that extend from one end in the axial direction of the lead and have a length that does not reach the other end. A discharge lamp according to any one of the above. The lead connecting portion is a cylindrical body having a smaller diameter than the cylindrical base body and disposed coaxially with the cylindrical base body, and the lead is inserted into the cylindrical body. The discharge lamp according to claim 1, characterized in that: Furthermore, it has an extension part extended in the axial direction of the lead from the cylindrical base body, and the extension part is formed so as to cover at least a part of the lead connection part in the circumferential direction of the lead. The discharge lamp according to any one of claims 1 to 17. The release according to any one of claims 1 to 18, wherein the cylindrical base body has a portion protruding inwardly, and the protruding portion is in contact with an outer peripheral surface of the glass tube. Electric light. 20. The discharge lamp according to claim 19, wherein the protruding portion of the base body is a protrusion or a spring piece that can be elastically deformed. 19. The method according to claim 1, further comprising a protrusion fixed to an outer peripheral surface of the glass tube and formed of a material different from that of the glass tube, the protrusion being in contact with the base body. A discharge lamp according to any one of the above. 19. The method according to claim 1, further comprising a protrusion fixed to an inner peripheral surface of the base body and formed of a material different from that of the base body, wherein the protrusion is in contact with the glass tube. The discharge lamp in any one. The discharge lamp according to claim 1, wherein the glass tube has a protrusion protruding from an outer peripheral surface thereof, and the base body is in contact with the protrusion of the glass tube. . Furthermore, it has a heat insulation layer arrange | positioned at least in part between the said glass tube and the said nozzle | cap | die main body, and was formed with the material whose heat conductivity is worse than the said nozzle | cap | die main body. The discharge lamp in any one. A pair of electrodes, a glass tube surrounding the pair of electrodes, and a pair of leads respectively connected to the pair of electrodes and led out from both ends of the glass tube to the outside of the glass tube A light source device in which a plurality of discharge lamps composed of a discharge tube and a base attached to the discharge tube are arranged,
The base of each discharge lamp includes a cylindrical base body covering one end portion of the glass tube, a lead connection portion electrically connected to the lead, and the lead connection portion electrically connected to the base body. A connecting portion provided between the lead connecting portion and the base body for mechanically connecting;
The connection auxiliary member is electrically and mechanically connected to the lead connection portion without the lead, and a first portion that is in contact with the lead and is disposed opposite the lead connection portion via the lead. And a second portion coupled to the light source device.

Images