JP2004186016A - Glass bulb and lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a glass bulb in which there is no possibility that a crack or the like is formed at the end part of a glass ball of the glass bulb by inserting a leading-in wire between the base and the end part of the glass ball. <P>SOLUTION: When the glass bulb L is connected and fixed to the base 10 provided with a base shell 1 at the end part of glass 60, the end part of the glass 60 is contacted with the base shell 1 at least at one position, and its objective is to make a gap of 0.5 mm or more from the base shell 1 to become 30-50% of the whole circumference. By doing that way, because an appropriate gap is provided between the end part of the glass bulb and the base 10, when mounting the leading-in wire 4a and the base shell 1, the possibility is reduced that the crack or the like is formed at the end part of the glass bulb 60 by pressure of the lead-in wire 4a. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp provided with a base and a lighting device.
[0002]
2. Description of the Related Art As a structure in which a screw-type base is bonded to a glass end of an incandescent lamp or a high-pressure discharge lamp, for example, a structure in which the base is attached to a base of a glass bulb using an adhesive (Patent Document 1). 1), a structure in which asbestos is firmly press-fitted into the base mounting portions of the base and the outer sphere, or the outer sphere is inserted and then the base is tightened with a base (FIG. 2 of Patent Document 1), the inner base. Heat molded into a shape having four recesses on the line fitted to the hemispherical inner convex part of the above, glued the inner base to the base mounting part of the outer sphere, screwed the outer base to this and stopped the screw from returning A structure in which the screw portions of both bases are pressed and received and attached (FIG. 3 of Patent Document 1), and a structure in which an adhesive is inserted into the base mounting portion of the outer sphere which is heat-formed into a screw shape, and screwed together to attach ( Patent Document 1 (Fig. 4), screw-shaped and screw detent After inserting the solder mass into the concave portion of the base mounting portion of the outer sphere, which was heat-molded into a shape having a concave portion for containing the solder mass for soldering, the die was screwed in, and the solder mass and the die were soldered as a screw detent and attached. Structure (FIG. 5 of Patent Document 1).
[0003]
In addition, in the sealing step of the glass sphere, the outer peripheral surface of the end of the glass sphere is formed in a spiral shape, and a groove for conducting one of a pair of external introduction lines derived from the end of the glass sphere is similarly formed in the glass. A structure in which a plurality of pieces are formed on the outer peripheral surface of the spherical end along the tube axis direction (FIG. 2 of Patent Document 2) is exemplified.
[0004]
[Patent Document 1] Japanese Utility Model Application Laid-Open No. 48-74484 (FIGS. 1 to 5)
[0005]
[Patent Document 1] Japanese Utility Model Publication No. 63-26928
However, these prior arts are susceptible to heat, ultraviolet rays, shocks, and torsional moments, and have drawbacks such as requiring an inner cap, an adhesive, and a large amount of solder. .
[0007]
In particular, the method of forming a concave portion (groove portion) in a glass sphere is particularly weak in stress when forming the concave portion in the glass sphere because it is locally heated and deformed. There is a risk that cracks may occur in the glass sphere due to the stress generated by pressing against the introduction wire.
[0008]
If there is no gap between the glass ball and the end of the base when inserting the lead wire, the glass ball is pressed against the base and the lead wire, and stress concentrates on the portion of the glass ball that is in contact with the lead wire. And the glass sphere is easily cracked. Therefore, the present invention has been made to eliminate the conventional disadvantages.
[0009]
According to a first aspect of the present invention, there is provided a tube for a tube having a base shell, which is in contact with the inner surface of the base shell at least at one position. A tube body having a glass bulb end with a gap of 5 mm or more of 30 to 50% of the entire circumference.
[0010]
In the present invention and each of the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified.
[0011]
The base shell is made of conductive metal such as aluminum, brass or copper into a substantially cylindrical shape. When the base is mounted on the tube body, the base body is supported by base cement or mechanical caulking. Make up the part to be done. Further, the base shell is connected to the lead-in wire led out of the tube body by pressing, welding, or brazing to form one of the conductive contact pieces.
[0012]
Other configurations of the base include an eyelet fitting support insulator and an eyelet fitting.
[0013]
The eyelet fitting support insulator is a part that functions to mechanically integrate an eyelet fitting, which will be described later, with the base shell while maintaining an insulating relationship. The eyelet metal support insulator can be formed of glass, ceramics, or the like. When the eyelet fitting supporting insulator is made of glass, the glass can be welded to the base shell and the eyelet fitting while being melted by heating. When made of ceramics, the base can be assembled by forming an eyelet support insulator by sintering in advance, caulking and fixing the eyelet base, and then caulking the base shell to the tip.
[0014]
The eyelet fitting is made of a conductive metal plate such as brass or copper and formed into a shallow dish-like or plate-like elongated end plate. Connected to cover the top of the body. Then, the top wire of the lead wire led out from the tube main body is made to pass through the lead wire insertion hole, and is fixed together with the eyelet fitting by soldering to form the other of the electric contact pieces.
[0015]
The tube main body includes an arc tube, has a pair of lead wires in a functional part, and means an article made of a glass bulb having a base as a power receiving unit, for example, a light source lamp, a lighting tube, The concept encompasses sensor tubes, rectifier tubes, receiving tubes, and the like. Note that “provided with an arc tube in the functional portion” means that at least a part of the functional portion is constituted by the arc tube. Further, the arc tube is allowed to have a single tube structure or a multi-tube structure in which the arc tube is housed in an outer tube. The light source lamp includes an incandescent light bulb, a bulb-shaped fluorescent lamp, an HID lamp, and the like. Thus, it is connected to the base at the end of the glass bulb.
[0016]
The end portion of the glass bulb has a gap of 0.5 mm or less with the base shell 30% to 50% of the entire circumference while being in contact with the inner surface of the base shell at at least one place. As an example of such a shape, since the base shell has a substantially cylindrical shape, the cross-sectional shape of the glass end portion can be a substantially polygonal shape, in particular, a substantially triangular or substantially square shape, or an elliptical shape. However, the curvature becomes large due to the nature of glass processing. In addition, the glass bulb and the base are allowed to fix and fix the base shell portion inside the base and the glass bulb end tube with cement.
[0017]
The “tube body” refers to the remaining portion of the tube excluding the base. Therefore, the tube body has all the functional parts other than the power receiving means.
[0018]
According to the first aspect of the present invention, since an appropriate gap is provided between the end portion of the glass bulb and the base, the insertion line is inserted into the gap between the base and the end portion of the glass bulb when the introduction line and the base shell are attached. By doing so, it is possible to provide a tube in which a crack or the like does not occur at the glass bulb end of the bulb.
A lighting device according to a second aspect of the present invention includes a fixture main body; and the bulb of the first aspect housed in the fixture main body.
[0019]
The device main body means any device that uses the light emission of the tube of claim 1 and includes, for example, downlights, floodlights, lighting devices such as roads and tunnels, and street lights.
[0020]
According to the present invention, it is possible to provide a lighting device having the effects of the first aspect.
[0021]
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a tube cap and a glass end according to the first embodiment of the present invention. FIG. 2 shows an incandescent lamp L as one embodiment of the bulb of the present invention.
[0022]
The base shell 1 is made of brass plated with nickel on the surface, has a cylindrical shape, is provided with a thread groove 1a around the periphery, is open at the lower end, is narrowed at the upper end, and has an opening for mounting an eyelet bracket support insulator in the center. Is formed.
[0023]
The eyelet fitting support insulator 2 is made of glass or ceramics, and the lower end is welded to the inner surface of the upper end of the base shell 1, and the middle part is spherically formed outside from the opening for the eyelet support support insulator at the upper end of the base shell 1. And the upper end is welded to the inside of an eyelet fitting 3 described later, thereby fixing the eyelet fitting 3 to the base shell 1 while forming an insulating relationship. The eyelet fitting 3 is made of brass whose surface is nickel-plated, and includes an end plate 3a, an insertion wire insertion hole 3b, and a flange 3c. The guide wire 4 of the tube body is inserted into the guide wire insertion hole 3b, and connects and fixes the guide wire 4 and the eyelet fitting 3.
[0024]
The incandescent lamp L comprises a light bulb main body 6 connected to a base 10. The bulb body 6 is configured by covering a filament 61, a stem 62 connected to a base, and an anchor 63 supporting the filament 61 on the stem 62 with a glass bulb 64. On the inner surface of the glass bulb 64, a diffusion prevention film made of silica or the like is formed.
[0025]
The base 10 is fixed to the glass end 60 of the incandescent lamp L by the base shell 1 and the cement 5. FIG. 1B illustrates a cross section (AA cross section) of the glass end portion 60 and the base shell 1. Reference numeral 66 denotes an exhaust pipe of the bulb main body. The glass end 60 and the base shell 1 are in contact at three points, and also have three gaps s. The gap s is 0.5 mm or more in a range of 30 to 50% of the entire circumference of the cross section. The introduction wire 4 is inserted through this gap, and is welded and fixed outside the base shell 1. The introduction wire 4 is a 0.3 mm thick dumet wire. If there is a portion where the gap s between the base shell 1 and the glass end 60 is 0.5 mm or more, the end of the glass bulb contacts the introduction wire. No local stress is caused by pressure or pressure, and the possibility of cracks or the like can be reduced.
[0026]
Next, as another embodiment, a cross section (AA cross section) of the glass end portion 60 and the base shell 1 is shown in FIG.
[0027]
In FIG. 3A, the glass end 60 has a substantially square shape and is in contact with the base shell at four points. Thus, 30 to 50% of a portion of the gap s of 0.5 mm or more is formed. In FIG. 3B, the glass end 60 has a substantially elliptical shape and is in contact with the base shell at two points. Thus, 30 to 50% of a portion of the gap s of 0.5 mm or more is formed. In FIG. 3C, the glass end 60 has a substantially semicircular shape, and is in contact with the base shell at one point of a short sleeve portion. Thus, about half the circumference has a gap so that a portion of 0.5 mm or more of the gap s is formed at 30 to 50%.
[0028]
FIG. 7 shows a lighting fixture 7 using the incandescent lamp L. The lighting fixture 7 includes a socket 72 corresponding to a base of the incandescent lamp L, a supporting wire 73 that supports the lighting fixture 7 and supplies power to the incandescent lamp L, and a reflecting mirror 74 in a lighting device main body 71.
[0029]
According to the first aspect of the present invention, since an appropriate gap is provided between the end portion of the glass bulb and the base, when the introduction line and the base shell are attached, the introduction line is connected to the base and the end of the glass bulb. By inserting the tube into the gap between the parts, it is possible to provide a tube in which a crack or the like does not occur at the glass bulb end of the tube.
[0030]
According to the invention of claim 2, it is possible to provide a lighting device having the effect of claim 1.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a tube cap and a glass end according to a first embodiment of the present invention.
FIG. 2 is also an incandescent lamp as one embodiment of the bulb of the present invention.
FIG. 3 is a cross-sectional view showing a tube cap and a glass end according to another embodiment of the present invention. FIG. 4 is a front view of a lighting fixture showing one embodiment of a lighting device of the present invention.
L: incandescent lamp as tube, 10: base, 1: base shell, 4a, 4b: introduction line, s: gap, 6: tube body, 60: glass end , 7 lighting equipment

Claims (2)

A tube cap with a cap shell;
A tube body in contact with the inner surface of the base shell at at least one location, and a gap of 0.5 mm or more from the base shell having a glass bulb end of 30 to 50% of the entire circumference;
A tube characterized by comprising: Instrument body;
The bulb of claim 1 housed in the instrument body;
A lighting device, comprising:

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