JP2010123548A - Base, discharge lamp with the base and light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of a difficulty in favorably combining a base with a lead in a cold cathode fluorescent lamp. <P>SOLUTION: The base 11 to be mounted on a discharge tube includes a metal base body 12 having an inner diameter allowing insertion of a glass tube 4 of the discharge tube, a lead connecting part 13 and a coupling part 14. The lead connecting part 13 includes first and second parts 19, 20 oppositely disposed to interpose the lead between them, extending in an axial direction of the metal base body and formed to nip the lead 6 between them and an intermediate part 21 coupling these parts to each other. In an axial direction of the lead 6, the first and second parts 19, 20 are not coupled to each other except the intermediate part 21, so that the first and second parts 19, 20 can be favorably deformed to nip the lead 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

A cold cathode fluorescent discharge lamp (CCFL) used as a backlight light source of a liquid crystal display device such as a TV monitor or a personal computer is known, for example, in Japanese Patent Application Laid-Open No. 2007-234551 (Patent Document 1). 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 shown in FIG. 1 is attached 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 (hereinafter referred to as a discharge tube). The discharge lamp is mounted on a pair of connectors (holders) 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 Document 1, in order to electrically connect the pair of leads 6 and 7 of the discharge tube 1 to the base body, the base is connected to the lead connection portion and the lead connection portion. And a connecting portion for electrical and mechanical connection. 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.

Further, in a miniaturized light source device, the heat of the discharge lamp may cause deformation or deterioration of other components in the vicinity of the discharge lamp (for example, a resin optical sheet), so that the heat dissipation of the discharge lamp or the light source device is improved. Is required.
JP 2007-234551 A

Accordingly, an object of the present invention is to provide a base, a discharge lamp, and a light source device that can improve the reliability of connection between a lead and a lead connection 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 base for mounting on a discharge tube,
A cylindrical base body formed to cover one end of the glass tube;
A lead connection for connecting the leads;
A connecting portion provided between the lead connecting portion and the base body for electrically and mechanically connecting the lead connecting portion to the base body;
The lead connecting portion includes a first portion connected to the connecting portion and extending in the axial direction of the lead, and an interval for arranging the lead between the first portion. The second portion disposed opposite to the first portion, the end of the first portion not connected to the connecting portion, and the end portion of the glass tube that is farthest from the end surface of the second portion And an intermediate portion that is disposed between the first portion and the second portion, and is related to the base.

It has 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. In a discharge lamp comprising a discharge tube and a base attached to the discharge tube, the base includes a cylindrical base body covering one end portion of the glass tube, and a lead connection portion connected to the lead. A connecting portion provided between the lead connecting portion and the base body for electrically and mechanically connecting the lead connecting portion to the base body, and the lead connecting portion includes the connecting portion. A first portion connected to the lead and extending in the axial direction of the lead and contacting the lead; and a second portion disposed facing the first portion and contacting the lead; The ream of the first part; Between the end of the second portion not connected to the portion and the end of the second portion farthest from the end face of the glass tube, and connects the first portion and the second portion. It is desirable to provide an intermediate portion.
In addition, the first and second portions of the lead connecting portion have a facing interval wider than the diameter of the lead before the base body is mounted on the glass tube, and the base body is disposed on the glass tube. It is desirable that the lead is formed so as to be clamped by plastic deformation after these are mounted.
In addition, the first and second portions of the lead connection portion have portions facing each other at an interval narrower than the diameter of the lead before the base body is attached to the glass tube, When the base body is mounted, the lead may be sandwiched by being elastically deformed so that an interval between the opposed portions of the first and second portions is widened.
Further, it is desirable that the intermediate portion of the lead connecting portion has an opening for inserting the lead.
The opening of the intermediate part of the lead connection part is preferably a hole through which the lead can penetrate.
Further, the opening in the intermediate portion of the lead connection portion can be a notch having an open end (for example, a U-shaped groove).
Moreover, it is preferable that a groove extending in the radial direction of the lead is formed in at least one of the first and second portions of the lead connection portion.
Further, it is preferable that at least one of the first and second portions of the lead connection portion has a groove extending in the radial direction of the lead, and is deformed into a hook shape and is in contact with the lead.
Preferably, the first and second portions of the lead connecting portion are electrically and mechanically coupled to the lead with at least one selected from plastic deformation, welding, and brazing. .
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 connecting portion connected to the lead, and a connecting portion provided between the lead connecting portion and the base body for electrically and mechanically connecting the lead connecting portion to the base body. The lead connecting portion is connected to the connecting portion and extends in the axial direction of the lead and is in contact with the lead; and the lead connecting portion is disposed opposite to the first portion and the lead Second contact with The first portion is disposed between the end of the first portion not connected to the connecting portion and the end of the second portion farthest from the end face of the glass tube and the first portion It is desirable to provide an intermediate portion connecting the portion and the second portion.

The lead connecting portion of the base according to the present invention has a first portion connected to the connecting portion and extending in the axial direction of the lead, and a space for arranging the lead between the first portion. A second portion opposed to the first portion, an end of the first portion not connected to the connecting portion, and an end of the second portion farthest from the end face of the glass tube And an intermediate portion connecting the first portion and the second portion. The first and second portions of the lead connecting portion do not have portions that are connected to each other except for an intermediate portion in the axial direction of the lead. Accordingly, it is easy to deform the first and second portions of the lead connecting portion in the circumferential direction of the lead before or after mounting the base on the glass tube. For this reason, the first and second portions of the lead connecting portion can be plastically deformed before or after the base is attached to the glass tube, and these can be brought into good contact with the lead. As a result, the reliability of electrical and mechanical coupling between the lead and the lead connection portion can be made higher than that of Patent Document 1.

  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.

  A discharge lamp 10 according to the first embodiment is shown in FIGS. 2 to 7, a base 11 used in the discharge lamp 10 is shown in FIGS. 8 to 10, and a lead connection portion 13 of the base 11 is shown in FIG. A part of the light source device 30 is shown in FIG. 12, and the discharge lamp 10 attached to the holder 31 is shown in FIG.

The discharge lamp 10 comprises an assembly of a discharge tube 1 and a base 11 as shown in FIGS. A discharge tube 1 according to the first embodiment is configured in the same manner as that indicated by the same reference numeral in FIG. 1, and includes a cylindrical glass tube 4 that surrounds a pair of electrodes 2 and 3 and in which mercury is enclosed, and this 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. Further, the other lead 7 of the discharge tube 1 can be connected to an external circuit without using a base.

  As shown in 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 connection connected to the lead 6. 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).

The base body 12 is formed in a cylindrical shape having an inner diameter (for example, 4.6 mm) larger than the outer diameter (for example, 4.4 mm) of the glass tube 4 in order to insert the cylindrical glass tube 4. However, the base body 12 of the first embodiment has a slit 16 extending in the axial direction as is apparent from FIG. 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 0.2 mm, for example, and is less than or equal to 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 from the end 18 of the glass tube 4 to the right end of one electrode 2 as is apparent from FIG. However, the axial length of the base body 12 can be changed to be shorter or longer than that in FIG.

The three protrusions 17 provided on the base body 12 most clearly shown in FIGS. 4 and 5 project in a hemispherical shape on the inner side in the radial direction of the base body 12 and have elasticity on the outer peripheral surface of the glass tube 4. And are formed so as to contact each other. 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, a gap (air layer) is interposed between the portion of the base body 12 where the protrusion 17 is not provided and the glass tube 4, and heat conduction from the glass tube 4 to the base body 12 is suppressed by the gap (air layer). Has been.
In addition, another protrusion having the same shape as or a different shape from the protrusion 17 projecting in a hemispherical shape on the radially inner side of the base body 12 can be provided at a position different from the protrusion 17 in the axial direction of the base body 12.

The connecting portion 14 for electrically and mechanically coupling the lead connecting portion 13 to the base body 12 is a strip-shaped conductor having a width of 0.5 to 1.0 mm, for example. A direction extended in the direction (horizontal direction) of the lead 6 and a portion bent in a direction (vertical direction) perpendicular to the direction in which the lead 6 extends, and a direction in which the lead 6 of the base body 12 extends; The lead 6 is formed so as to be slightly elastically deformable in any direction perpendicular to the direction in which the lead 6 extends. The height of the connecting portion 14 in the radial direction (vertical direction) of the base body 12 in FIG. 6 is lower than the height of the lead 6. Further, since the connecting portion 14 rises substantially vertically from the base body 12, the end 18 of the glass tube 4 is disposed relatively close to the connecting portion 14. Thereby, the length of the axial direction of the discharge lamp 10 which mounted | wore with the nozzle | cap | die 11 can be shortened.

As shown in FIG. 2 and the like, the lead connection portion 13 is formed in a U-shape or a U-shape when viewed roughly, and the first and second portions 19 and 20 facing each other are interconnected with each other. It consists of an intermediate part (third part) 21 which can also be called a part. The first and second portions 19 and 20, which can also be referred to as a pair of lead sandwiching portions, extend in the axial direction of the lead 6, and can be spaced from each other (for example, the lead 6). 6 is slightly wider than the diameter of 6) and are opposed to each other and wider than the connecting portion 14 in the radial direction of the base body 12. In FIG. 6, the first and second portions 19 and 20 of the lead connection portion 13 extend substantially parallel to the lead 6, but may extend non-parallel to the lead 6. For example, in order to facilitate the insertion of the lead 6 between the first and second portions 19 and 20 of the lead connecting portion 13, the first and second portions 19 and 20 are arranged on the glass tube 4 side from the tip of the lead 6. The first and second portions 19 and 20 can be extended along the lead 6 so that the facing distance gradually increases. In this case, it is desirable that the distance between the tip of the second portion 20 and the first portion 19 be equal to or larger than the diameter of the lead 6. Further, in order to satisfactorily hold the lead 6 between the first and second portions 19 and 20 of the lead connecting portion 13, the first and second portions 19 and 20 from the tip of the lead 6 to the glass tube 4 side. The first and second portions 19 and 20 can be extended along the lead 6 so that the facing distance gradually decreases. In this case, it is desirable to apply a spring action to at least the second portion 20 so that the distance between the tip of the second portion 20 and the first portion 19 is equal to or smaller than the diameter of the lead 6. In this case, when the lead 6 is inserted into the first and second parts 19, 20, the tip of the second part 20 is forcibly moved away from the first part 19 and the first part 19 and the first part 19. The distance from the portion 19 is made larger than the diameter of the lead 6.
In addition, one of the first and second portions 19 and 20 can be extended in parallel to the lead 6 and the other can be extended non-parallel.
Therefore, in the present invention, that the first and second portions 19 and 20 extend in the axial direction of the lead 6 means both extending in parallel and non-parallel to the lead 6.
The first and second portions 19 and 20 of the lead connecting portion 13 are formed so that they can be plastically deformed before or after the base 11 is attached to the glass tube 4. The end of the first portion 19 of the lead connecting portion 13 on the glass tube 4 side is connected to the connecting portion 14. The end of the first connecting portion 13 of the lead connecting portion 13 that is far from the glass tube 4 is connected to one end of the second portion 20 through an intermediate portion (third portion) 21. The second portion 20 of the lead connection portion 13 extends from the intermediate portion (third portion) 21 in a direction approaching the glass tube 4. The first and second portions 19 and 20 of the lead connecting portion 13 are intermediate portions (third portions) in the extending direction of the lead 6 in order to facilitate plastic deformation before or after mounting the base 11 to the glass tube 4. Are not connected to each other except 21).
As shown in FIG. 2, in a state where the base 10 is attached to the glass tube 4, the first portion 19 of the lead connection portion 13 is disposed below the lead 6, and the second portion of the lead connection portion 13 is disposed on the lead 6. The portion 20 is arranged.
In this embodiment, the portions of the lead connection portion 13 that face each other in parallel or non-parallel through the leads 6 are defined as first and second portions 19 and 20, and the first and second portions 19 and 20 are defined as the first and second portions 19 and 20. The connected part is defined as an intermediate part (third part) 21.

An intermediate portion (third portion) 21 of the lead connecting portion 13 extends in the radial direction of the base body 12 and is connected to ends of the first and second portions 19 and 20 far from the glass tube 4. The intermediate portion 21 is provided with an opening 22 made of a hole for allowing the lead 6 to pass therethrough. The opening 22 has a function of positioning the lead 6 or limiting the position. As apparent from FIG. 4, the width of the lower portion of the opening 22 of the intermediate portion 21 is wider than the width of the connecting portion 14 in the radial direction of the base body 12. By doing so, the mechanical coupling (holding) between the connecting portion 14 and the lead connecting portion 13 can be improved.
In addition, the intermediate part 21 shown by U shape or U shape in FIG.2 and FIG.8 can be curved in circular arc shape. In addition, the width of the intermediate portion 21 of the lead connecting portion 13 in the direction orthogonal to the lead 6 in FIG. 3 can be made wider than the width of the first and second portions 19 and 20.

When manufacturing the base 11, a metal plate is prepared and subjected to a well-known press process. The protrusions 17 are simultaneously formed during this pressing. Thereafter, the lead connecting portion 13 and the connecting portion 14 are formed by bending, and the base body 12 is obtained by forming a metal plate into a cylindrical shape. Note that the first and second portions 19 and 20 of the lead connecting portion 13 can be pre-shaped into a U shape or an arc shape as shown in FIG. 5 before attaching the base 11 to the glass tube 4. It is.

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 come into contact with the glass tube 4 with elasticity, 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 inserted into the opening 22 of the intermediate portion 21 of the lead connection portion 13 and is disposed between the first and second portions 19 and 20. . Next, a direction in which the first and second portions 19 and 20 of the lead connecting portion 13 are pressed against the lead 6 by a caulking tool (not shown) (perpendicular to the first and second portions 19 and 20). Direction) is applied to the first and second parts 19 and 20 to plastically deform at least a part of the first and second parts 19 and 20, and the first and second parts deformed as shown in FIG. The lead 6 is sandwiched between the two portions 19 'and 20' to establish these electrical and mechanical couplings. In addition, as already demonstrated, before attaching the nozzle | cap | die 11 of FIGS. 8-11 to the glass tube 4, the 1st and 2nd parts 19 and 20 are previously made into U shape or circular arc shape as shown in FIG. It is also possible to mold. As described above, even when the first and second portions 19 and 20 are previously formed into a U shape or an arc shape, the first and second portions 19 and 20 and the lead 6 are electrically and mechanically coupled. In order to make it stronger, the first and second portions 19 and 20 are plastically deformed so that the first and second portions 19 and 20 preliminarily formed in a U shape or an arc shape are pressed against the lead 6. It is desirable. Further, the width of the first and second portions 19 and 20 of the lead connecting portion 13 can be made wider than the length of the lead 6 half circumference. In this case, the first and second portions 19 and 20 of the lead connecting portion 13 are plastically deformed to have portions corresponding to blade portions 72, 73, 74, and 76 shown in FIG. Weld each other. Thereby, the reliability of the electrical and mechanical coupling between the first and second portions 19 and 20 and the lead 6 is further improved.
Thereafter, the deformed first and second portions 19 ′, 20 ′ are irradiated with laser on the deformed first and second portions 19 ′, 20 ′ of the lead connection portion 13 ′ and the lead 6. Further stabilizes the electrical and mechanical coupling. If necessary, at least a part of the lead connecting portion 13 ′ and the lead 6 can be joined with solder.

2 to 7 is used as, for example, a backlight light source device 30 of a liquid crystal display device shown in FIG. The light source device 30 is a surface light source configured by juxtaposing a plurality of discharge lamps 10. The caps 11 at both ends of each discharge lamp 10 are held by connectors 31 that can be called metal holders. 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 body 12 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) The first and second portions 19 and 20 of the lead connecting portion 13 are led out from the intermediate portion 21 in the direction in which the leads 6 extend. Therefore, the first and second portions 19 and 20 are not connected to each other except for the intermediate portion 21 in the direction in which the lead 6 extends. For this reason, when the first and second portions 19 and 20 are plastically deformed so as to sandwich the lead 6, this plastic deformation can be achieved with little interference of the intermediate portion 21. Thereby, the reliability of electrical and mechanical coupling between the lead 6 and the lead connecting portion 13 can be made higher than that of Patent Document 1.
(2) The first and second portions 19 and 20 of the lead connection portion 13 function as a heat radiator of the lead 6. Thereby, the discharge lamp or light source device whose heat dissipation is better than patent document 1 can be provided.
(3) Since the connecting portion 14 between the lead connecting portion 13 and the base body 12 rises almost vertically from the base body 12, the end portion 18 of the glass tube 4 is connected to the lead connecting portion without being obstructed by the connecting portion 14. 13 can be approached. Thereby, the length of the axial direction of the discharge lamp 10 which mounted | wore with the nozzle | cap | die 11 can be shortened.
(4) Since the connecting portion 14 between the lead connecting portion 13 and the base body 12 is an elastically deformable band, 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 lead 6 to the glass tube 4.
(5) Since the base body 12 has the protrusion 17 on the inner side and can be elastically deformed, it can be easily and satisfactorily fitted to the glass tube 4, and between the base body 12 and the glass tube 4. It is possible to provide a desired space having a heat insulating function.
(6) The connecting portion 14 is formed to be elastically deformable in a direction perpendicular to the direction in which the lead 6 extends. For this reason, the lead connecting portion 13 also applies a vertical pressure to the first and second portions 19 and 20 in order to plastically deform the first and second portions 19 and 20 so as to sandwich the lead 6. It is possible to prevent the stress generated when the first and second portions 19 and 20 are plastically deformed from being absorbed by the elastically deformable connecting portion 14 and spreading from the lead 6 or the lead connecting portion 13 to the glass tube 4.
(7) Since the base body 12 has the protrusion 17 on the inner side and can be elastically deformed, the lead connecting portion 13 also plastically deforms the first and second portions 19 and 20 so as to sandwich the lead 6. Therefore, the base body 12 that can be elastically deformed absorbs stress generated when the first and second portions 19 and 20 are plastically deformed by applying vertical pressure to the first and second portions 19 and 20. It is possible to prevent the glass tube 4 from spreading from the lead 6 or the lead connecting portion 13.

Next, the base 11a of the discharge lamp according to the second embodiment will be described with reference to FIG. However, in FIG. 14 showing the second embodiment and the drawings showing another embodiment to be described later, the same reference numerals are given to the substantially same parts as those in FIGS. 1 to 13 showing the first embodiment. Description is omitted. In the description of the second embodiment and another embodiment described later, FIGS. The base 11a according to the second embodiment shown in FIG. 14 has the same configuration as the base 11 of the first embodiment except for the deformed connecting portion 14a. The deformed connecting portion 14a is inclined with respect to a direction having both a component in the extending direction of the lead 6 and a component in a direction perpendicular to the extending direction of the lead 6 in the first embodiment (inclined with respect to the extending direction of the lead 6). And a portion 40b led out in parallel to the direction in which the lead 6 extends. The inclined portion 40a coupled to the base body 12 via the portion 40b can be elastically displaced in both the axial direction and the radial direction of the base body 12. Accordingly, the deformed connecting portion 14a according to the second embodiment shown in FIG. 14 has a larger buffer function between the lead connecting portion 13 and the base body 12 than the connecting portion 14 of the first embodiment.
The positional relationship between the inclined portion 40a and the portion 40b derived in parallel can be exchanged. That is, the inclined portion 40a can be led out from the base body 12 immediately. In addition, a portion parallel to the axial direction of the lead 6 can be additionally provided between the inclined portion 40 a and the lead connecting portion 13. Moreover, the part 40b derived | led-out in parallel is also omissible. Further, the portions extending perpendicularly to the axial direction of the base body 12 are formed between the base body 12 and the portion 40b, between the portion 40b and the inclined portion 40a, and between the inclined portion 40a and the lead connecting portion 13 in FIG. It can be provided in addition to at least one of them. In short, the connection part 14 of Example 1 and 14a of Example 2 can be deformed into various shapes that can be elastically deformed.

The deformed lead connecting portion 13a shown in FIG. 15 has a pair of grooves 41 at the boundary between the intermediate portion 21 and the deformed first portion 19a, and the deformed second portion deformed with the intermediate portion 21. A pair of grooves 42 is provided at the boundary with the portion 20a. The first portion 19 a is connected to the intermediate portion 21 at the remaining portion between the pair of grooves 41, and the second portion 20 a is connected to the intermediate portion 21 at the remaining portion between the pair of grooves 42. Accordingly, the lead 6 is easily and satisfactorily clamped by the plastic deformation of the first and second portions 19a and 20a although the first and second portions 19a and 20a are wide in the radial direction of the base body 12. And a strong electrical and mechanical connection between the first and second portions 19a, 20a and the lead 6 is obtained. Further, the welding of the lead connecting portion 13a and the lead 6 can be achieved satisfactorily.
Note that the first and second portions 19a and 20a of the lead connecting portion 13a of FIG. 15 are previously formed into a U-shaped cross-section or a circular arc shape so as to fit the lead 6 before the base is attached to the glass tube 4. be able to.
Also, two pairs of grooves 41, 42 can be provided in the first and second portions 19 a, 20 a or in the intermediate portion 21.
Further, the width of the first and second portions 19 a and 20 a in the radial direction of the base body 12 can be made narrower than the intermediate portion 21.
In addition, one groove can be provided in each of the first and second portions 19a and 20a by omitting the upper and lower portions of the pair of grooves 41 and 42.
Moreover, the connection part 14 of FIG. 15 can be made into the connection part 14a shown in Example 2, or another shape similar to this.

Next, a discharge lamp 10a according to the fourth embodiment will be described with reference to FIGS. The discharge lamp 10a shown in FIG. 16 has the same configuration as the discharge lamp 10 according to the first embodiment except that it has a deformed base 11b. Also, the base 11b of FIG. 16 has the same configuration as the base 11 according to the first embodiment except that the lead connection portion 13b is deformed. The deformed lead connecting portion 13b shown in FIGS. 16 and 17 is the same as the lead connecting portion 13 according to the first embodiment except that the deformed first and second portions 19b and 20b are included. The deformed first and second portions 19b and 20b shown in FIGS. 16 and 17 have protrusions 51 and 52 that elastically sandwich the lead 6, respectively. Before inserting the lead 6 into the lead connecting portion 13b, the distance between the tip of the second portion 20b (the end on the glass tube 4 side) and the first portion 19b in FIG. 16 is set wider than the diameter of the lead 6. In addition, the distance between the pair of protrusions 51 and 52 is set to be slightly smaller than the diameter of the lead 6. In FIG. 16, the pair of projecting portions 51 and 52 are formed in an arc shape (circular arc shape) and extend in the entire width direction (direction intersecting the lead 6). When the lead 6 is inserted between the first and second portions 19b and 20b, the first and second portions 19b and 20b are elastically deformed in a direction in which the mutual distance is widened, and the lead 6 has a spring action. As shown in FIG. 16, the lead 6 and the first and second portions 19b and 20b are electrically and mechanically connected. Furthermore, when the protrusions 51 and 52 of the first and second portions 19b and 20b are welded to the lead 6 with a laser, the electrical and mechanical connection between the lead 6 and the first and second portions 19b and 20b is achieved. Becomes stronger.
The fourth embodiment also has the same effect as the first embodiment.
If necessary, the lead 6 and the first and second portions 19b and 20b of the fourth embodiment can be plastically deformed by caulking as in the first embodiment. Further, the first and second portions 19b and 20b of the fourth embodiment can be provided with the same grooves as the grooves 41 and 42 of FIG. 15 showing the third embodiment. Moreover, the connection part 14 of Example 4 can be deform | transformed into the connection part 14a which has the inclination of FIG. Further, a plurality of protrusions 51 and 52 can be provided in the direction in which the leads 6 extend. Moreover, the protrusions 51 and 52 can be moved to the tips of the first and second portions 19b and 20b. Further, instead of the protrusions 51 and 52, the tip portions of the first and second portions 19b and 20b are deformed so as to approach each other, and a spring action is applied to the tip portions so that the distance between the tip portions can be reduced. The leads 6 set to be slightly narrower than the diameter and inserted at the interval between the tip portions can be held between the tip portions of the first and second portions.

The lead connection portion 13c according to the fifth embodiment shown in FIG. 18 has a lead connection portion according to the first embodiment shown in FIG. 11 except that an intermediate portion 21a having an opening 22a formed of a U-shaped notch, that is, a U-shaped groove is provided. 13 is formed in the same manner. The deformed opening 22a of the intermediate portion 21a in FIG. 18 extends in the horizontal direction (horizontal direction) in FIG. 18, has an open end, and has the same function as the opening 22 in FIG.
Since the lead connection portion 13c according to the fifth embodiment is the same as the lead connection portion 13 according to the first embodiment in the basic structure, it has the same effect as the first embodiment.
In FIG. 18, the connecting portion 14 is transformed into the connecting portion 14a of the second embodiment (FIG. 14), the grooves 41 and 42 similar to those in FIG. 15 are provided in the lead connecting portion 13c, and the first and second portions. The portions 19 and 20 can be transformed into first and second portions 19b and 20b having protrusions 51 and 52 shown in FIGS.

19 and 20 show a part of the discharge lamp 10c according to the sixth embodiment. The discharge lamp 10c according to the sixth embodiment is configured in the same manner as the discharge lamp 10 according to the first embodiment except that the discharge lamp 10c has a deformed base 11c. The base 11c of the sixth embodiment is configured in the same manner as the lead connection portion 13 according to the first embodiment except that the lead connection portion 13d is deformed. The deformed lead connecting portion 13d has the same configuration as the lead connecting portion 13 according to the first embodiment except that the deformed intermediate portion 21b is provided. The deformed intermediate portion 21b is configured in the same manner as the intermediate portion 21 according to the first embodiment except that it does not have an equivalent to the opening 22 of the intermediate portion 21 according to the first embodiment. Since the intermediate portion 21b of the lead connecting portion 13d according to the sixth embodiment shown in FIGS. 19 and 20 does not have an opening, the tip of the lead 6 is disposed between the first and second portions 19 and 20. The intermediate portion 21 b having no opening has a function of positioning the tip of the lead 6 in the axial direction of the lead 6.
Since the discharge lamp 10c according to the sixth 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.
19 and 20, the connecting portion 14 is transformed into the connecting portion 14a of the second embodiment (FIG. 14), the lead connecting portion 13d is provided with grooves 41 and 42 similar to those shown in FIG. The second portions 19 and 20 can be transformed into first and second portions 19b and 20b having protrusions 51 and 52 shown in FIGS.

FIG. 21 shows a part of a discharge lamp 10d according to the eighth embodiment. The discharge lamp 10d of the eighth embodiment is configured in the same manner as the discharge lamp 10 according to the first embodiment except that the discharge lamp 10d has a deformed base 11d. The base 11d of the eighth embodiment is the same as the base 11 according to the first embodiment except that a base body 12a having a plurality of elastic holding pieces 17a is provided instead of the three protrusions 17 shown in FIG. ing. The elastic holding piece 17a in FIG. 21 is a spring piece having a tip protruding inward of the cylindrical base body 12a. The elastic holding piece 17a is in contact with the outer peripheral surface of the glass tube 4 to hold the glass tube 4, and the protrusion shown in FIG. Functions in the same way as 17.

Since the discharge lamp 10d according to the seventh 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.
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 12a.
Further, the elastic holding piece 17a can be transformed into various shapes of elastic holding pieces having functions equivalent to this.
Further, the elastic holding piece 17a or the elastic holding pieces of various shapes having functions equivalent to the elastic holding pieces 17a or the projections 17 shown in FIG. Can be arranged.
Further, both the elastic holding piece 17a of FIG. 21 and the protrusion 17 shown in FIG. 7 and the like can be arranged in the circumferential direction at the same position in the axial direction of the base body 12a.
Also, the deformed base 11d of FIG. 21 corresponding to the connecting portion 14 according to the first embodiment (not shown) is replaced with the inclined connecting portion 14a of the second embodiment (FIG. 14) or another similar connecting portion. Can be replaced.
21 is equivalent to the lead connection portion 13 according to the first embodiment (not shown) of the deformed base 11d, the lead connection portion 13a of the third embodiment (FIG. 15), and the lead connection portion 13a of the fourth embodiment (FIG. 16). The lead connection part 13b, the lead connection part 13c of Example 5 (FIG. 18), the lead connection part 13d of Example 6 (FIG. 19), and the like can be used.

FIG. 22 shows a cross section of a discharge lamp 10e according to the eighth embodiment. The discharge lamp 10e of FIG. 22 is configured in the same manner as the discharge lamp 10 according to the first embodiment, except that it has a deformed base 11e. 22 is the same as the base 11 according to the first embodiment except that a base body 12b having a deformed slit 16a is provided. The deformed base body 12b is different from the base body 12 of the first embodiment in that the end portions 61 and 62 facing each other through the slit 16a are slightly bent inside the base body 12b. This is the same as the base body 12 of the first embodiment. When the base body 12b is configured as shown in FIG. 22, even if burrs, that is, minute protrusions are generated in the portion adjacent to the slit 16a of the base body 12b due to pressing, the burrs are removed from the circumscribed circle of the base body 12b. When the cap 10e is mounted on the glass tube 4 or when the discharge lamp 10e is mounted on the connector 31 of FIG.
Note that in embodiments other than the first embodiment, the same one as the base body 12b of FIG. 22 can be provided.

FIG. 23 shows a cross section of a discharge lamp 10f according to the ninth embodiment. The discharge lamp 10f of FIG. 23 is configured in the same manner as the discharge lamp 10 according to the first embodiment except that it has a deformed base 11f. Further, the base 11f of FIG. 23 has the same configuration as the base 11 according to the first embodiment except that a deformed base body 12c is provided. The base body 12c of FIG. 23 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 12c of FIG. 23 is a cylindrical body without a slit. The base body 12c can be fitted to the glass tube 4 by configuring the protrusion 17 so that the base body 12c can be deformed without a slit.
In addition, the elastic holding piece 17a of FIG. 21 can be provided on the base body 12c in place of the protrusion 17.
Moreover, also in Examples 2 to 7, the base bodies 12 and 12a can be formed into a cylindrical body that does not have the slits 16 as in FIG.

FIG. 24 shows a cross section of a discharge lamp 10g according to the tenth embodiment. The discharge lamp 10g in FIG. 24 is configured in the same manner as the discharge lamp 10 according to the first embodiment except that the additional heat insulating layer 70 is provided.
The heat insulating layer 70 is fixed to a region facing the base body 12 on the outer peripheral surface of the glass tube 4, and a paste (ink) made of a resin (preferably polyimide) having lower thermal conductivity than the base body 12 is used for the glass tube 4. It is formed by printing (or coating) on the outer peripheral surface of the substrate and baking or drying. Alternatively, the heat insulating layer 70 may be formed by sticking a predetermined shape tape made of resin (preferably polyimide) to the whole or a part of the outer peripheral surface of the glass tube 4 facing the base body instead of printing. it can. The three protrusions 17 of the base body 12 are in contact with the glass tube 4 via the heat insulating layer 70. Therefore, the heat conduction from the glass tube 4 to the base body 12 in the discharge lamp 10g of FIG. 24 is smaller than the heat conduction from the glass tube 4 to the base body 12 in the discharge lamp 10 of the first embodiment. Further, since the heat insulating layer 70 is formed of a resin that is more easily elastically deformed than the glass tube 4, it functions as a protective cushion between the glass tube 4 and the base body 12 and protects the glass tube 4.
The discharge lamp 10g according to the sixth embodiment is the same as the discharge lamp 10 according to the first embodiment in the basic structure, and thus has the same effect as the first embodiment.
In addition, although the heat insulation layer 70 of this Example 10 is formed in the whole area | region facing the base body 12 of the outer peripheral surface of the glass tube 4, it opposes the base body 12 of the outer peripheral surface of the glass tube 4 instead. The heat insulating layer 70 can be formed in a part or a plurality of divided parts.
Further, a plurality of heat insulating layers 70 can be formed by dividing in the circumferential direction of the glass tube 4.
Further, a plurality of heat insulating layers 70 can be formed by dividing the glass tube 4 in the axial direction. The heat insulating layer 70 in FIG. 24 is disposed between the elastic holding piece 17a and the glass tube 4 in FIG. be able to. Moreover, the heat insulation layer 70 of FIG. 24 can be arrange | positioned between the elastic holding piece currently disclosed by WO2008 / 001562, or the similar thing, and a glass tube.
Further, both the protrusion 17 shown in FIG. 7 or the like and the elastic holding piece 17a shown in FIG. 21 or the like (for example, the elastic holding piece disclosed in WO2008 / 001562) are combined into one. Even in the case of providing the base body, the heat insulating layer 70 of FIG. 24 can be provided. In this case, the heat insulating layer 70 shown in FIG. 24 may be provided adjacent to one or both of the protrusion 17 shown in FIG. 7 or the like and the elastic holding piece 17a shown in FIG. 21 or the like. it can.
Further, instead of providing the heat insulating layer 70 of FIG. 24 on the outer peripheral surface of the glass tube 4, it can also be provided on the inner peripheral surface of the base body 12 including the protrusions 17.
Further, the heat insulating layer 70 can be disposed in a portion other than between the glass tube 4 and the protrusion 17 of the base body 12.
Moreover, the connection part 14 of the nozzle | cap | die 11 which is not shown by FIG. 24 can be deform | transformed into the connection part 14a etc. of Example 2 (FIG. 14). Further, the lead connection part 13 of the base 11 not shown in FIG. 24 is replaced with the lead connection part 13a of Example 3 (FIG. 15), the lead connection part 13b of Example 4 (FIG. 16), and Example 5 (FIG. 18). ) Lead connection part 13c, the lead connection part 13d of Example 6 (FIG. 19), and the like.

FIG. 25 shows a discharge lamp 10h according to the eleventh embodiment. The discharge lamp 10h shown in FIG. 25 has the same configuration as the discharge lamp 10 shown in FIGS. 2 to 7 except for the deformed base 11d and the protrusion 17b. The deformed base 11d has the same configuration as the base 11 shown in FIGS. 2 to 7 except for the deformed base body 12d. The deformed base body 12d has the same structure as the base body 12 shown in FIGS. 2 to 10 except that the base body 12d does not have the protrusion 17 shown in FIG.

25, three hemispherical protrusions 17b are provided on the outer peripheral surface of the glass tube 4 in place of the protrusions 17 shown in FIG. The three protrusions 17b on the outer peripheral surface of the glass tube 4 are arranged at the same angular position as the three protrusions 17 of the base body 12 shown in FIG. Each protrusion 17b is formed by printing (or 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). Has been. Note that the protrusion 17b 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 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 11d. 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 protrusion 17b is determined so that each protrusion 17b contacts the inner peripheral surface of the base body 12d when the glass tube 4 is inserted into the base 11d.

Each protrusion 17b of Example 14 functions as a spacer for making a space for heat insulation between the base body 12d and the glass tube 4 in the same manner as the protrusion 17 of FIG. Further, since the resin protrusion 17b of Example 14 has a lower thermal conductivity than the metal 17 of FIG. 7, the heat conduction between the base body 12d and the glass tube 4 is similar to that of the base body 12d and the glass tube 4 of FIG. It is suppressed more than the heat conduction between.
Moreover, since the resin protrusion 17b of Example 14 is formed of a resin that is more elastically deformed than the glass tube 4, it functions as a protective cushion between the glass tube 4 and the base body 12, and protects the glass tube 4. .
Further, each projection 17b is hemispherical or frustoconical, and the thickness thereof gradually decreases toward the inlet side end surface of the base body 12d into which the discharge tube 1 is inserted. Therefore, the discharge tube 1 is smoothly placed on the base body 12d. Can be inserted into.
Since the discharge lamp 10h according to the eleventh 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.
In addition, the thing similar to the processus | protrusion 17b can be arrange | positioned in the multiple places of the axial direction of the glass tube 4. FIG.
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 may be formed in a material or shape that is difficult to elastically deform, and the remaining one may be formed in a material or shape that is more easily elastically deformed than the protrusion 17b that is not easily elastically deformed. it can. Thereby, the protrusion 17b 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, the protrusions 17b can have other shapes such as a truncated cone shape, a truncated pyramid shape, a cylindrical shape, and a prism shape other than the hemispherical shape.
Further, the protrusion 17 b and the protrusion 17 or the elastic holding piece 17 a can be provided in combination in the circumferential direction of the glass tube 4. Further, in addition to the projection 17b, a projection 17 or an elastic holding piece 17a can be provided in the axial direction of the glass tube 4.
Moreover, the same thing as the heat insulation layer 70 of FIG. 24 can be added.
Moreover, the connection part 14 of the nozzle | cap | die 11 which is not shown by FIG. 25 can be deform | transformed into the connection part 14a etc. of Example 2 (FIG. 14). Further, the lead connection part 13 of the base 11 not shown in FIG. 25 is replaced with the lead connection part 13a of Example 3 (FIG. 15), the lead connection part 13b of Example 4 (FIG. 16), and Example 5 (FIG. 18). ) Lead connection part 13c, the lead connection part 13d of Example 6 (FIG. 19), and the like.

FIG. 26 shows a discharge lamp 10i according to the twelfth embodiment. The discharge lamp 10i of FIG. 26 is configured in the same manner as the discharge lamp 10 of Example 1 of FIG. 2 except that it has a deformed base 11d and an additional protrusion 11c.
The deformed base 11d in FIG. 26 is deformed in the same manner as in FIG. 25, and does not have the metal protrusion 17 in FIG. The added protrusion 11c is formed of a resin (preferably polyimide) which is a different material from the base body 12d. The protrusion 17c is formed by printing (or applying) and baking (or drying) a resin (preferably polyimide) paste (ink) on a metal plate before the base body 12d is formed into a cylinder. Instead of printing, the protrusion 17c can be formed by sticking a tape of a predetermined shape made of resin (preferably polyimide) to a metal plate for the base body 12d.
The three protrusions 17c formed on the base body 12d are arranged at the same angular positions as the three protrusions 17 of the base body 12 shown in FIG. The shape of each protrusion 17c 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 12d. However, the cross-sectional shape and planar shape of each protrusion 17c 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 17c is determined so that each projection 17c contacts the glass tube 4 when the glass tube 4 is inserted into the base 11e.

Each protrusion 17c of Example 12 functions as a spacer that creates a space for heat insulation between the base body 12d and the glass tube 4 like the protrusion 17 in FIG. 7 and the protrusion 17b in FIG.
Since the discharge lamp 10i according to the twelfth embodiment is the same as the discharge lamp 10 of the first embodiment in the basic structure, it has the same effect as the first embodiment.
The protrusion 17c can be formed in a material or shape that is more easily elastically deformed than the base body 12d.
Moreover, the same thing as the processus | protrusion 17c can be arrange | positioned in the multiple places of the axial direction of the lead | read | reed 6.
Further, the three protrusions 17c may not be formed identically, and one or more of them may be formed to have the protrusion 17, the elastic holding piece 17a, another shape similar to this, or different elasticity. it can. For example, one or two of the three protrusions 17c are formed in a material or shape that is hardly elastically deformed, and the remaining one or two are more easily deformed than the protrusion that is not easily elastically deformed. Can be formed on the protrusion. 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 12d.
Further, instead of the three protrusions 17c, a ring-shaped protrusion or spacer made of a heat insulating resin can be provided on the inner peripheral surface of the base body 12d. A plurality of the ring-shaped protrusions can be arranged in the axial direction of the base body 12d.
Further, in addition to the protrusion 17c or a ring-shaped protrusion similar to the protrusion 17c in the axial direction of the glass tube 4, a protrusion 17 or an elastic holding piece 17a can be provided.
Moreover, the connection part 14 of the nozzle | cap | die 11 which is not shown by FIG. 26 can be deform | transformed into the connection part 14a etc. of Example 2 (FIG. 14).
Further, the lead connection part 13 of the base 11 not shown in FIG. 26 is replaced with the lead connection part 13a of Example 3 (FIG. 15), the lead connection part 13b of Example 4 (FIG. 16), and Example 5 (FIG. 18). ) Lead connection part 13c, the lead connection part 13d of Example 6 (FIG. 19), and the like.

FIG. 27 shows a discharge lamp 10j according to the thirteenth embodiment. The discharge lamp 10j in FIG. 27 is configured in the same manner as the discharge lamp 10 in the first embodiment in FIG. 2 except that a deformed base 11d and an additional heat insulating layer 90 are provided.
The deformed base 11d has the same configuration as the base 11 of FIG. 7 except that the protrusion 17 of FIG. 7 is not provided. The heat insulating layer 90 is made of a material having lower thermal conductivity than the base 11d (for example, a material having an air layer such as foamed resin inside), and is fixed to the outer peripheral surface of the glass tube 4 in the same manner as the protrusion 17b of FIG. It functions as a spacer between the glass tube 4 and the base body 12d. The base body 12 d is in contact with the heat insulating layer 90 with its own elastic deformation and elastic deformation of the heat insulating layer 90.
Since the heat insulation layer 90 is made of resin and has elasticity or cushioning properties, the spread of stress from the base body 12d to the glass tube 4 is suppressed.
Since the discharge lamp 10j according to the thirteenth 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.
Instead of providing the heat insulating layer 90 on the entire outer peripheral surface of the glass tube 4, protrusions can be partially provided from a heat insulating material corresponding to the protrusion 17 b in FIG. 25 or the protrusion 17 c in FIG. 26. Further, the protrusion corresponding to the heat insulating layer 90 and the protrusion 17b of FIG. 25, the protrusion 17c of FIG. 26, or the elastic holding piece 17a of FIG. 21 can be provided in combination in the circumferential direction of the glass tube 4.
Further, in addition to the heat insulating layer 90 in the axial direction of the glass tube 4, the protrusion 17, the protrusion 17 b, the protrusion 17 c, or the like can be additionally provided.
Moreover, the connection part 14 of the nozzle | cap | die 11 which is not shown by FIG. 27 can be deform | transformed into the connection part 14a etc. of Example 2 (FIG. 14).
Further, the lead connection part 13 of the base 11 not shown in FIG. 27 is replaced with the lead connection part 13a of Example 3 (FIG. 15), the lead connection part 13b of Example 4 (FIG. 16), and Example 5 (FIG. 18). ) Lead connection part 13c, the lead connection part 13d of Example 6 (FIG. 19), and the like.

FIG. 28 is a cross-sectional view showing the first and second portions 19c and 20c of the modified lead connecting portion 13e according to the fourteenth embodiment, cut at the same position as the line CC in FIG. The modified lead connection portion 13e is configured in the same manner as the lead connection portion 13 of the first embodiment except for the first and second portions 19c and 20c. The first and second portions 19c and 20c of the lead connection portion 13e shown in FIG. 28 are curved in advance in an arc shape before the discharge tube 11 is mounted on the base. The curved first and second portions 19 c and 20 c are formed so as to surround the circular outer peripheral surface of the lead 6. When the discharge tube 11 is attached to the base, the lead 6 is disposed between the first and second portions 19c and 20c. Thereafter, preferably, the first and second portions 19c and 20c are plastically deformed (crimped) so as to be pressed against the lead 6, and further welded.
In the fourteenth embodiment, since the first and second portions 19c and 20c are curved in advance in an arc shape, plastic deformation (caulking) and welding of the first and second portions 19c and 20c are easily performed. It has the effect of being able to.
Since the lead connection portion 13e according to the embodiment 14 is the same as the lead connection portion 13 of the embodiment 1 in the basic structure, it has the same effect as the embodiment 1.
Prior to mounting the discharge tube 11 on the base, the first portion 19c of the lead connecting portion 13e is not curved in advance as shown in FIG. 28, but is flattened like the first portion 19 of FIG. It may be kept in shape.
Further, the lead connection portions 13a, 13b, and 13c of FIGS. 15, 17, and 18 can be modified in the same manner as the lead connection portion 13e of FIG.
Moreover, the lead connection part 13e of FIG. 28 is applicable also to Examples 6-14.

29 is a cross-sectional view showing the first and second portions 19d and 20d of the modified lead connecting portion 13f according to the fifteenth embodiment, cut at the same position as the CC line in FIG. The deformed lead connection portion 13f is configured the same as the lead connection portion 13 of the first embodiment except for the first and second portions 19d and 20d. The first portion 19d of the lead connection portion 13f shown in FIG. 29 has an arc-shaped portion 71 formed before the discharge tube 1 is mounted on the base, and a pair of blade portions 72 and 73. The second portion 20d of the lead connection portion 13f includes an arc-shaped portion 74 that is formed before the discharge tube 1 is mounted on the base, and a pair of blade portions 75 and 76. Arc-shaped portions 71 and 74 of the first and second portions 19 d and 20 d are formed so as to surround the circular outer peripheral surface of the lead 6. The pair of blade portions 72 and 73 of the first portion 19d are formed to face the pair of blade portions 75 and 76 of the second portion 20d. When the discharge tube 1 is attached to the base, the lead 6 is disposed between the arc-shaped portions 71 and 74 of the first and second portions 19d and 20d. Thereafter, preferably, the arc-shaped portions 71 and 74 of the first and second portions 19d and 20d are plastically deformed (crimped) so as to be pressed against the lead 6, and further welded. Further, the pair of blade portions 72 and 73 of the first portion 19d and the pair of blade portions 75 and 76 of the second portion 20d are welded.
In the fifteenth embodiment, the first and second portions 19d and 20d are formed in the desired shape in advance, so that the first and second portions 19c and 20c are easily plastically deformed and welded. be able to.
Since the lead connection portion 13f according to the fifteenth embodiment is the same as the lead connection portion 13 of the first embodiment in the basic structure, it has the same effect as the first embodiment.
Before the discharge tube 11 is mounted on the base, the first portion 19d or the second portion 20d of the lead connection portion 13f is not previously bent into an arc shape as shown in FIG. 29, and the first portion of FIG. Similar to the portion 19 or the second portion 20, it may be kept flat.
Further, the lead connection portions 13a, 13b, and 13c of FIGS. 15, 17, and 18 can be modified in the same manner as the lead connection portion 13f of FIG.
Moreover, the lead connection part 13f of FIG. 29 is applicable also to Examples 6-14.

The present invention is not limited to the above-described embodiments, and for example, the following modifications are possible.
(1) The base of the present invention can be applied to 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) The cross-sectional shape of the lead 6 may not be circular. Further, a part of the lead 6 facing the lead connecting portions 13, 13a, 13b, 13c, 13d can be crushed and flattened. As a result, at least one of caulking, welding, and brazing (for example, soldering) for connecting the lead connecting portions 13, 13 a, 13 b, 13 c, 13 d and the lead 6 can be satisfactorily performed.
(4) In each embodiment, the electrical connection and mechanical connection between the lead connection parts 13, 13a, 13b, 13c, 13d and the lead 6 are held by the lead connection parts 13, 13a, 13b, 13c, 13d. Alternatively, it may be performed by at least one selected from plastic deformation (caulking), welding (for example, laser welding or spot welding), and brazing (for example, soldering).
(5) The base body according to the present invention may have any shape as long as it can be regarded as a cylindrical shape or a cylindrical shape surrounding a part of the glass tube 4. For example, the base bodies 12, 12 a, 12 b, 12 c, 12 d are formed with a plurality of slits extending in the axial direction and having a length that does not reach the other end face 23 from one end face 24, 12a, 12b, 12c, 12d can be configured to be easily elastically deformed in the direction of increasing their diameter.
(6) The base body according to the present invention can be engaged only in the vicinity of the end 18 of the lead 6 of the glass tube 4. Further, the protrusions 17, 17a, 17b and the like can be omitted, and the base body can be brought into contact with the glass tube 4 so as not to have a gap.
(7) The lead connecting portions 13, 13a, 13b, 13c, the connecting portions 14, 14a, and the base bodies 12, 12a, 12b, 12c, 12d of each embodiment are made by processing a single metal plate. . Therefore, it has the characteristic that these can be manufactured very easily. However, one or more of these can be formed individually and then joined together by welding or the like. In this case, there is an effect that each part can be manufactured without being restricted by other parts.
(8) The discharge lamp or the base can be configured by combining the configurations having the characteristics of the plurality of embodiments.

(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 carrying out plastic deformation of the lead connection part. It is a top view which shows the discharge lamp of FIG. 2 in the state before carrying out plastic deformation of the lead connection part. FIG. 3 is a left side view showing the discharge lamp of FIG. 2 in a state before plastic deformation of a lead connecting portion. FIG. 4 is a cross-sectional view of the discharge lamp of FIG. 2 corresponding to the line CC of FIG. 3 after the lead connection portion is plastically deformed. It is the sectional view on the AA line of the discharge lamp 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. FIG. 10 is a cross-sectional view of the base of FIG. 9 taken along the line DD. It is an expansion perspective view which shows the lead connection part and connection part of a nozzle | cap | die of FIG. 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. 6 is a front view showing a base according to Embodiment 2. FIG. It is an expansion perspective view which shows the lead connection part and connection part of a nozzle | cap | die according to Example 3. 6 is a plan view showing a part of a discharge lamp according to Embodiment 4. FIG. It is an expansion perspective view which shows the lead connection part and connection part of a nozzle | cap | die of FIG. It is an expansion perspective view which shows the lead connection part and connection part according to Example 5. FIG. It is a front view which shows a part of discharge lamp according to Example 6 in the state before plastic deformation of a lead connection part. FIG. 20 is a plan view showing a part of the discharge lamp of FIG. 19 in a state before plastic deformation of the lead connecting portion. 10 is a cross-sectional view showing a part of a discharge lamp according to Example 7. FIG. It is sectional drawing which shows a part of discharge lamp according to Example 8 similarly to FIG. It is sectional drawing which shows a part of discharge lamp according to Example 9 similarly to FIG. 10 is a cross-sectional view showing a part of a discharge lamp according to Example 10. FIG. It is sectional drawing which shows a part of discharge lamp according to Example 11 similarly to FIG. It is sectional drawing which shows a part of discharge lamp according to Example 12 similarly to FIG. It is sectional drawing which shows a part of discharge lamp according to Example 13 similarly to FIG. It is sectional drawing which shows a part of lead | read | reed connection part according to Example 14 by equivalent to CC line of FIG. FIG. 16 is a cross-sectional view showing a part of the lead connection portion according to the embodiment 15 corresponding to the line CC in FIG. 3.

Explanation of symbols

1 discharge tube 6, 7 lead 11 base 12 base body 13 lead connection part 14 connection part 19, 20 first and second part 21 intermediate part

Claims (16)

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 base for mounting on a discharge tube,
A cylindrical base body formed to cover one end of the glass tube;
A lead connection for connecting the leads;
A connecting portion provided between the lead connecting portion and the base body for electrically and mechanically connecting the lead connecting portion to the base body;
The lead connecting portion includes a first portion connected to the connecting portion and extending in the axial direction of the lead, and an interval for arranging the lead between the first portion. The second portion disposed opposite to the first portion, the end of the first portion not connected to the connecting portion, and the end portion of the glass tube that is farthest from the end surface of the second portion And a middle portion that is disposed between the first portion and the second portion. The first and second portions of the lead connecting portion have a facing interval wider than the diameter of the lead before the base body is attached to the glass tube, and the base body is attached to the glass tube. 2. The base according to claim 1, wherein the lead is formed so as to be sandwiched by plastic deformation after being formed. The first and second portions of the lead connecting portion have portions facing each other at a distance narrower than the diameter of the lead before the base body is mounted on the glass tube, and the base is disposed on the glass tube. 2. The device according to claim 1, wherein when the main body is mounted, the lead is sandwiched by being elastically deformed so that a distance between the opposed portions of the first and second portions is widened. Base.   4. The base according to claim 1, wherein the intermediate portion of the lead connecting portion has an opening for inserting the lead. The base according to claim 4, wherein the opening in the intermediate portion of the lead connecting portion is a hole through which the lead can be passed. The base according to claim 4, wherein the opening of the intermediate portion of the lead connection portion is a notch having an open end. The base according to any one of claims 1 to 6, wherein a groove extending in a radial direction of the lead is formed in at least one of the first and second portions of the lead connecting portion. A discharge tube having 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 And a discharge lamp comprising a base attached to the discharge tube,
The base includes a cylindrical base body covering one end portion of the glass tube, a lead connection portion connected to the lead, and the lead connection portion to electrically and mechanically connect the lead connection portion to the base body. A connecting portion provided between the lead connecting portion and the base body,
The lead connecting portion is connected to the connecting portion and extends in the axial direction of the lead and is in contact with the lead. The lead connecting portion is disposed to face the first portion and contacts the lead. Arranged between the second part in contact, the end of the first part not connected to the connecting portion, and the end of the second part farthest from the end face of the glass tube A discharge lamp comprising: an intermediate portion connecting the first portion and the second portion. The first and second portions of the lead connecting portion are arranged to face each other with a gap wider than the diameter of the lead before the base body is mounted on the glass tube. 9. The discharge lamp according to claim 8, wherein the lead is clamped by being plastically deformed after the main body is mounted. The first and second portions of the lead connection portion are arranged to face each other with a space narrower than the diameter of the lead before the base body is attached to the glass tube. 9. The discharge lamp according to claim 8, wherein the lead is sandwiched by being elastically deformed so that a facing interval is widened when the main body is mounted. The at least one of the first and second portions of the lead connecting portion has a groove extending in a radial direction of the lead, is deformed into a bowl shape, and is in contact with the lead. The discharge lamp according to any one of 7 to 10. The first and second portions of the lead connection are electrically and mechanically coupled to the lead with at least one selected from plastic deformation, welding, and brazing. The discharge lamp according to any one of claims 8 to 11.   The discharge lamp according to claim 8, wherein the intermediate portion of the lead connection portion has an opening, and a part of the lead is inserted into the opening. 14. The discharge lamp according to claim 13, wherein the opening in the intermediate portion of the lead connecting portion is a hole through which the lead can be penetrated, and a part of the lead is inserted into the hole. . The discharge lamp according to claim 13, wherein the opening of the intermediate portion of the lead connection portion is a notch having an open end, and a part of the lead is inserted into the notch. 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 connected to the lead, and the lead connection portion electrically and mechanically to the base body. A coupling portion provided between the lead connection portion and the base body for coupling,
The lead connecting portion is connected to the connecting portion and extends in the axial direction of the lead and is in contact with the lead. The lead connecting portion is disposed to face the first portion and contacts the lead. Arranged between the second part in contact, the end of the first part not connected to the connecting portion, and the end of the second part farthest from the end face of the glass tube And a light source device comprising: an intermediate portion connecting the first portion and the second portion.

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