JP2009129569A - Discharge lamp and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent reciprocal interference between a pair of lead wires during a manufacturing process of a mount part of a discharge lamp, and prevent generation of short circuiting due to short between the pair of lead wires. <P>SOLUTION: A mount part 7 provided at an end part of a glass tube 6 comprises a pair of lead wires 11 supporting the filament 12, an exhaust tube 14 for exhausting the inside of the glass tube 6, a flare stem 13 formed so as to cover an outer periphery of the exhaust tube for supporting the lead wires 11, and a lead-regulating member 15 provided between an inner periphery of the flare stem 13 and an outer periphery of the exhaust tube 14 for regulating a position of the lead wires 11. The lead-regulating member 15 is made of an insulating material in a cylindrical shape, and constitutes two spaces 17 for separating the pair of lead wires 11 between the outer periphery of the exhaust tube 14 and the inner periphery of the lead-regulating member 15. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a discharge lamp such as a fluorescent lamp or a mercury lamp and a method for manufacturing the same.

  The fluorescent lamp is provided with a mount portion having a pair of lead wires for supporting the filament at both ends of the glass tube coated with the phosphor on the inner surface. As shown in FIG. 10, a general mount 107 includes a flare stem 113 that supports a pair of lead wires 111 and an exhaust for exhausting the inside of the glass tube 106 that is disposed on the inner periphery of the flare stem 113. Tube 114.

  In the fluorescent lamp configured as described above, when the filament is energized through the pair of lead wires 111, the electron-emitting material heated by the filament emits thermoelectrons, and the thermoelectrons are contained in the glass tube 106. It collides with mercury and generates ultraviolet light, which excites the phosphor and generates visible light.

In addition, as a fluorescent lamp related to the present invention, the height dimension of the flare stem in the length direction of the glass tube in one mount portion at both ends of the glass tube is the height dimension of the flare stem in the other mount portion. A configuration employing a so-called high mount method in which the reduction in efficiency associated with an increase in the ambient temperature of the fluorescent lamp has been achieved is disclosed (for example, see Patent Document 1). Moreover, the luminaire to which this type of fluorescent lamp is mounted includes an electronic ballast, so-called inverter, for stabilizing the current supplied to the fluorescent lamp.
JP 2006-1000025 A

  By the way, in the above-described high mount type fluorescent lamp, the lead wire on the one mount portion, that is, the high mount portion side, in which the height dimension of the flare stem is larger than the other mount portion, is relatively long. For this reason, in the manufacturing process of the mount portion, as shown in FIG. 11, end portions (hereinafter referred to as external lead wires) of the pair of lead wires 111 that are drawn to the outside may interfere with each other and short-circuit. There is.

  When the external lead wire is short-circuited in this way, in the fluorescent lamp, the lead wire is not normally energized to the filament, and an overcurrent flows to the transistor or the like of the electronic ballast. The electronic ballast has many advantages such as less power loss and less flickering of the fluorescent lamp, but has high current supply capability. For this reason, when a short circuit occurs between a pair of lead wires connecting a terminal and a filament provided on a base of a fluorescent lamp, an overcurrent is abnormally overheated by flowing into a transistor of an electronic ballast. There is.

  In particular, in the case of an annular fluorescent lamp, when mounting on a lighting fixture, while rotating the base on which the terminal is arranged around the tube axis of the glass tube, the terminal of the base and the socket on the side of the lighting fixture Are electrically connected. For this reason, the external lead wire has an extra length of play necessary for rotating the base. Therefore, when a fluorescent lamp is mounted on a lighting fixture, a pair of external lead wires may interfere with each other to cause a short circuit, and it is required to prevent such a short circuit from occurring.

  Accordingly, the present invention solves the above-described problems, and prevents mutual interference between a pair of lead wires in the manufacturing process of the discharge lamp mounting portion, and prevents occurrence of a short circuit due to a short between the pair of lead wires. An object of the present invention is to provide a discharge lamp and a method for manufacturing the same.

  In order to achieve the above-described object, a discharge lamp according to the present invention includes a discharge tube and a mount portion provided at an end of the discharge tube. The mount section includes a pair of lead wires that support the filament, an exhaust pipe for exhausting the inside of the discharge tube, a stem that covers the outer periphery of the exhaust tube and supports the lead wire, and an inner periphery of the stem. A lead regulating member provided between the outer periphery of the exhaust pipe and regulating the position of the lead wire. The lead restricting member is formed in a cylindrical shape by an insulating material, and forms two spaces separating the pair of lead wires between the outer periphery of the exhaust pipe and the inner periphery of the lead restricting member.

The discharge lamp manufacturing method according to the present invention includes a discharge tube and a mount portion provided at an end of the discharge tube, and the mount portion includes a pair of lead wires that support the filament, and an inside of the discharge tube. A discharge lamp manufacturing method having an exhaust pipe for exhausting and a stem that covers an outer periphery of the exhaust pipe and supports a lead wire,
A lead regulating member that is formed in a cylindrical shape by an insulating material between the inner circumference of the stem of the mount portion and the outer circumference of the exhaust pipe and regulates the position of the lead wire is provided between the outer circumference of the exhaust pipe and the inner circumference of the lead regulating member. There is a step of attaching so as to constitute two spaces for separating the pair of lead wires therebetween.

  According to the present invention, by restricting the lead wire routing range by the lead restricting member, it is possible to prevent mutual interference between the pair of lead wires in the manufacturing process of the mounting portion of the discharge lamp, and also due to a short between the pair of lead wires. The occurrence of a short circuit can be prevented.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the fluorescent lamp 1 according to the embodiment includes a glass tube 6 as a discharge tube in which a phosphor (not shown) is provided on an inner peripheral portion, a mount portion 7 that constitutes an electrode, And a base 8 having a terminal 9 for supplying power to the electrode, and is configured as a fluorescent lamp dedicated to high-frequency lighting.

  The glass tube 6 is formed in an annular shape and has a tube diameter of about 14 mm to 18 mm.

  The mount portion 7 is provided at each end of the glass tube 6. As shown in FIGS. 3 and 4, the mount portion 7 includes a pair of lead wires 11 that support a filament 12 as an electrode, an exhaust pipe 14 for exhausting the inside of the glass tube 6, and the exhaust pipe 14. It has a flare stem 13 that covers the outer periphery and supports the lead wire 11. The mount portion 7 is provided with a lead regulating member 15 that regulates the position of the pair of lead wires 11 between the inner circumference of the flare stem 13 and the outer circumference of the exhaust pipe 14.

  As shown in FIG. 5, the lead restricting member 15 is formed in a cylindrical shape having an elliptical cross section by an insulating material, and has a minor axis substantially equal to the outer diameter of the cylindrical exhaust pipe 14. Strictly speaking, the short diameter of the lead regulating member 15 is slightly larger than the outer diameter of the exhaust pipe 14 so that the exhaust pipe 14 can be smoothly inserted into the inner peripheral portion of the lead regulating member 15. In addition, although the lead | read | reed control member 15 in this embodiment is formed with the glass material, you may form with another ceramic.

  As shown in FIG. 4, the lead restricting member 15 includes two spaces 17 for separating the pair of lead wires 11 between the outer periphery of the exhaust pipe 14 and the inner periphery in the major axis direction of the lead restricting member 15. Yes. Since the pair of lead wires 11 are accommodated in these spaces 17 and the movement range is restricted, the lead wires 11 are held in parallel with each other at positions facing each other with the exhaust pipe 14 interposed therebetween. Short circuit due to short circuit is prevented.

  Further, in the fluorescent lamp 1 of the present embodiment, the mounting portion 7 on one end side of the glass tube 6 has a height of the flare stem 13 with respect to the length direction of the glass tube 6 and the mounting portion on the other end side. 7 is formed larger than the height of the flare stem 13, and a so-called high mount system is adopted. That is, the fluorescent lamp 1 of the present embodiment has a high mount portion on one end side and a low mount portion on the other end side, and the pair of lead wires 11 has a relatively long length. A lead regulating member 15 is provided. In the present embodiment, the height of the flare stem 13 in the high mount portion is formed to be 30 mm or more, and the height of the flare stem 13 in the low mount portion is formed to be 19 mm or less.

  Inside the base 8, a pair of lead wires 11 are drawn from each mount portion 7, and ends of the pair of lead wires 11 are electrically connected to the terminals 9. The base 8 is provided so as to connect both ends of the glass tube 6, and is supported by the glass tube 6 so as to be movable around the tube axis of the glass tube 6. Since the base 8 is configured to be movable around the tube axis of the glass tube 6, the lead wire 11 has a predetermined play amount with respect to the length dimension.

  In the fluorescent lamp 1 according to the embodiment configured as described above, when the filament 12 is energized through the pair of lead wires 11, the electron emitting material heated by the filament 12 of each mount portion 7 emits thermoelectrons. The emitted thermoelectrons collide with mercury in the glass tube 6 to generate ultraviolet rays, which excite the phosphor and generate visible light.

  Next, the manufacturing process of the mount part 7 is demonstrated about the manufacturing method of the fluorescent lamp 1 of embodiment.

  In the method for manufacturing the fluorescent lamp 1 according to the embodiment, as shown in FIG. 6A, the exhaust pipe 14 is inserted and joined to the inner peripheral portion of the flare stem 13 that supports the pair of lead wires 11. Each mount part 7 which is a high mount part and a low mount part is assembled. Subsequently, in the method for manufacturing the phosphor 1, as shown in FIGS. 6B and 6C, a lead regulating member is provided between the inner periphery of the flare stem 13 and the outer periphery of the exhaust pipe 14 in the high mount portion. 15 is inserted, and the lead restricting member 15 is attached so as to constitute two spaces 17 for separating the pair of lead wires 11 between the outer periphery of the exhaust pipe 14 and the inner periphery in the major axis direction of the lead restricting member 15. . As a result, the pair of lead wires 11 are accommodated in the two spaces 17 and separated in a parallel state.

  And the mount part 7 in which the lead control member 15 was provided, and the other mount part 7 are each sealed by each edge part of the glass tube 6, as shown in FIG. Next, the lead wire 11 of each mount part 7 is electrically connected to the terminal 9 of the base 8, and the base 8 is attached so as to cover each end of the glass tube 6.

  As described above, according to the fluorescent lamp 1 of the embodiment, the provision of the cylindrical lead regulating member 15 prevents mutual interference between the pair of lead wires 11 in the manufacturing process of the mount portion 7 of the fluorescent lamp 1. At the same time, the lead restricting member 15 limits the routing range of the lead wire 11, thereby preventing a short circuit from occurring due to a short of the lead wire 11.

  Further, as in this embodiment, particularly in the case of an annular fluorescent lamp 1, the position of the terminal 9 of the base 8 is set to the tube axis of the glass tube 6 when the fluorescent lamp 1 is mounted on a lighting fixture (not shown). In order to adjust around, the play amount of the length of the lead wire 11 is ensured comparatively large. For this reason, the effect of regulating the position of the pair of lead wires 11 by the lead regulating member 15 is great, and a short circuit occurs between the lead wires 11 of the mount portion 7 when the annular fluorescent lamp 1 is mounted on the lighting fixture. Can be prevented.

  In the embodiment described above, the oval cylindrical lead regulating member 15 is used, but two spaces for separating a pair of lead wires are provided between the outer periphery of the exhaust pipe and the inner circumference of the lead regulating member. As long as the shape is formed, the lead regulating member may be formed in a cylindrical shape having another shape.

  For example, as shown in FIG. 8, the lead regulating member 25 may be formed in a cylindrical shape that forms a parallelogram that circumscribes the exhaust pipe 14. Also with the lead restricting member 25, each lead wire 11 is accommodated in the two spaces 27 formed between the outer periphery of the exhaust pipe 14 and the inner periphery of the lead restricting member 15, similarly to the lead restricting member 15 described above. By doing so, a short circuit between the pair of lead wires 11 can be prevented.

  For example, as shown in FIG. 9, the lead regulating member 35 is formed in a circular shape whose inner diameter is slightly larger than the outer diameter of the exhaust pipe 14, and a recess 37 that holds the pair of lead wires 11 separately. Are formed at opposing positions. Similarly to the above-described lead regulating member 15, the lead regulating member 35 can prevent each pair of lead wires 11 from being short-circuited by housing each lead wire 11 in the two recesses 37.

  The discharge lamp according to the present invention is applied to the fluorescent lamp of the above-described embodiment, but is not limited to the fluorescent lamp, and is applied to other discharge lamps such as a cold cathode discharge lamp and a mercury lamp. Is preferred.

  Further, the discharge lamp according to the present invention is applied to the above-described annular fluorescent lamp. For example, the discharge lamp is a straight tube discharge lamp or a discharge lamp having a shape folded in the middle in the length direction of the straight tube. Of course, it may be applied.

It is a top view which shows the fluorescent lamp of this embodiment. It is a longitudinal cross-sectional view which shows the mount part of the said fluorescent lamp. It is a longitudinal cross-sectional view which expands and shows the said mount part. It is a cross-sectional view which expands and shows the said mount part. It is a figure which shows a lead control member. It is a side view for demonstrating the manufacturing process of a mount part. It is a side view which shows the sealing process of a glass tube and a mount part. It is a cross-sectional view showing another lead restricting member. It is a cross-sectional view showing still another lead restricting member. It is a cross-sectional view which shows the mount part of the fluorescent lamp relevant to this invention. It is a longitudinal cross-sectional view which shows the short between the lead wires in the mounting part of the fluorescent lamp relevant to this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluorescent lamp 6 Glass tube 7 Mount part 11 Lead wire 12 Filament 13 Flare stem 14 Exhaust pipe 15 Lead control member 17 Space

Claims (6)

A discharge tube, and a mount portion provided at an end of the discharge tube,
The mount portion includes a pair of lead wires for supporting a filament, an exhaust pipe for exhausting the inside of the discharge tube, a stem formed to cover an outer periphery of the exhaust tube and supporting the lead wire, A lead regulating member provided between an inner circumference and an outer circumference of the exhaust pipe for regulating the position of the lead wire;
The lead restricting member is formed in a cylindrical shape by an insulating material, and constitutes two spaces separating the pair of lead wires between the outer periphery of the exhaust pipe and the inner periphery of the lead restricting member. Discharge lamp.   2. The discharge lamp according to claim 1, wherein the lead regulating member is formed in a cylindrical shape having an elliptical cross section, and has a minor axis substantially equal to an outer diameter of the cylindrical exhaust pipe.   One of the mount portions at both ends of the discharge tube is formed such that the height of the stem with respect to the length direction of the discharge tube is larger than the height of the stem of the other mount portion. The discharge lamp according to claim 1, wherein the lead regulating member is provided in a portion.   The discharge lamp according to claim 1, wherein the lead regulating member is made of ceramic.   The discharge lamp according to any one of claims 1 to 4, wherein the discharge tube is formed in an annular shape. A discharge tube; and a mount portion provided at an end of the discharge tube, wherein the mount portion includes a pair of lead wires for supporting a filament, an exhaust tube for exhausting the inside of the discharge tube, and the exhaust A discharge lamp manufacturing method comprising a stem formed to cover an outer periphery of a tube and supporting the lead wire,
Between the inner periphery of the stem of the mount portion and the outer periphery of the exhaust pipe, a lead restricting member that is formed in a cylindrical shape by an insulating material and restricts the position of the lead wire is provided, the outer periphery of the exhaust pipe and the lead restriction A method for manufacturing a discharge lamp, comprising a step of attaching the pair of lead wires so as to form two spaces between the inner periphery of the member.

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