JP3717831B2 - Lamp device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp device capable of accurately and firmly fixing a double lamp to a thermoplastic resin at a predetermined position using a fixing metal fitting.
[0002]
[Prior art]
When fixing a double-ended type double lamp to a resin plug, insert one end of the double lamp into the fixing hole of the plug, and the light emitting point (P) of the double lamp [for the halogen lamp, the center of the filament, the discharge lamp For the plug, the double lamp is moved and adjusted three-dimensionally with respect to the plug so that the arc emission portion formed between the electrodes is at a predetermined position with respect to a reference position to be described later of the plug. The double lamp is fixed to the plug by filling the fixing hole with an inorganic adhesive. However, filling and fixing with an inorganic adhesive takes time to solidify the inorganic adhesive. Therefore, it is necessary to hold a double lamp during that time, and there is a problem that work efficiency is poor.
[0003]
Therefore, as shown in FIG. 9, a method of fixing the lower end portion (110a) of the inner bulb (110) of the double lamp (101) to the resin plug (102) through a metal fixture (103). However, the following new problems have occurred. The first problem is that the lower end (110a) of the thin straight tube of the inner bulb (110) of the double lamp (101) is clamped from both sides by a pair of metal fixing brackets (103) and fixed. Therefore, when mounted on a part where impact vibration is constantly applied, for example, a part such as a headlight of an automobile, from the holding part indicated by the arrow by the metal fixing bracket (103) to the lower end ( 110a) breaks, and secondly, the pinching force gradually decreases due to repeated thermal expansion and contraction caused by repeated lighting and extinguishing. The double lamp (101) is displaced in the axial direction by the vibration, and as a result, the light emitting point (P) of the double lamp (101) with respect to the reference position of the plug described above is shifted, that is, the double lamp from the focal point of the headlight. The light emission point (P) of (101) is shifted, and the light distribution of the headlight is impaired or bright. There was a problem that would reduce the amount of rumors.
[0004]
In particular, as described above, in this method, the thin straight tubular lower end portion (110a) of the inner valve (110) is sandwiched and fixed from both sides by a pair of metal fixing brackets (103). Therefore, since the direction parallel to the paper surface of FIG. 9 is the same direction as the plane of the metal fixture (103), the thin lower end (110a) is supported by the metal fixture (103). However, in the direction perpendicular to the paper surface, the metal fixing bracket (103) is easily bent by the vibration, and the thin lower end portion (110a) is likely to be broken.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the related art, and after adjusting the position of the lamp by devising the mounting position and mounting method of the fixing bracket with respect to the double lamp, the lamp is firmly attached to the resin plug. The object is to develop a lamp device that can be stably fixed and held.
[0006]
[Means for Solving the Problems]
The lamp device (A) according to the first aspect of the present invention has a structure in which “sealing portions (13) and (14) are formed at both ends of the arc tube portion (12) and the mounting leg portion is formed from one sealing portion (13). An inner lamp (10) extending from the inner lamp (10) and an outer envelope (11) housing the inner lamp (10). A double lamp (1) having a recess (8) formed on the outer periphery of the envelope (11), and a fixing bracket (3) attached so as to surround the recess (8) of the outer envelope (11); A lamp device (A) comprising a thermoplastic resin plug (2) in which a metal fitting fixing recess (5) into which a recess-side lower end (22) of a double lamp (1) is inserted is formed. The fixing metal fitting (3) protrudes from the annular or cylindrical metal fitting body (3a) fixed to the concave portion (8) of the outer envelope (11 ) and the metal fitting body (3a) , and is a metal fitting fixing concave portion. (5) to heat Characterized in that it is constructed de projecting part (4) which is embedded in the form. "
“Claim 2” is a further limitation of “Claim 1”, wherein “ the protrusion (4) is deformed on the inner peripheral surface of the metal fitting fixing recess (5) due to thermal deformation of the contact portion with the protrusion (4) . A thermal deformation protrusion (5a) embedded in the thermal deformation portion (6) is formed ".
[0007]
According to this, after adjusting the three-dimensional position of the light emitting point (P) of the double lamp (1) with respect to the resin plug (2) described later, the fixing bracket (3) is heated by, for example, induction heating, thereby fixing the fixing bracket. Heating and softening the contact part of the resin plug (2) in contact with (3) to thermally deform that part, and then cooling and solidifying the deformed part (6) to fix the fitting ( The contact part of 3) is embedded and fixed in the plug (2). As a result, it is possible to perform the attachment to the plug (2) of the fixing bracket (3) very simply and quickly.
[0008]
Here, because the fixing bracket (3) is attached to the recess (8) formed on the outer periphery of the outer envelope (11), it is assumed that there was repeated thermal expansion / contraction due to external vibration and repeated lighting / extinguishing. However, the fixing bracket (3) is not displaced from the recess (8). Furthermore, if the fixing bracket (3) is fixed so as to surround the entire circumference of the recess (8), and the periphery of the fixing bracket (3) is fixed uniformly in the bracket fixing recess (5), The front and rear, left and right (XY directions) are supported with the same strength, and the holding portion (= recess (8)) has a mounting leg (110a) of a thin inner lamp (110) as in the prior art. ) And the thick outer envelope (11), the holding portion is not damaged by the shock vibration or thermal expansion / contraction.
[0010]
Further, the protruding portion (4) refers to one that protrudes outward from the upper end or lower end of the metal fitting body (3a) or an intermediate portion thereof, and is thermally deformed into the metal fitting fixing concave portion (5). Various things such as a “projection-like” (not shown) formed on the outer surface of the main body (3a) or a “hook-like” are included. When the protruding portion (4) is “saddle-shaped”, the outer edge portion is simply a circular arc (see FIG. 2 (a)) or has a protrusion (4b) (see FIG. 2 (b)). )and so on.
[0011]
“Claim 3 ” is a second embodiment of the present invention, wherein “ sealing portions (13) and (14) are formed at both ends of the arc tube portion (12) , and the mounting leg portion is formed from one sealing portion (13). an inner ramp (13a) is extended (10), wherein constructed out with the outer envelope accommodating a inner lamp (10) (11), the outer in the mounting legs of the inner lamp (10) (13a) side an envelope double lamp recesses on the outer circumference of (11) (8) is formed (1), an outer envelope (11) of the fixing bracket to the are attached so as to surround the recess (8) (3), in the concave side lower end of the double ramp (1) (22) lamp is formed out with a thermoplastic resin plug fitting fixing recesses to be inserted (5) is formed (2) device (a) The fixing metal fitting (3) is an annular or cylindrical metal fitting body (3a) fixed to the concave portion (8) of the outer envelope (11), and a protruding portion protruding from the metal fitting body (3a) ( 4) on the outer edge The heat-deformed projection (5a) projecting from the inner surface of the metal fixture fixing recess (5) is fitted into the heat-deformed projecting portion (5a), and the contact portion of the heat-deformed projecting portion (5a) is thermally deformed. A plurality of notch grooves (4a) embedded in the substrate are formed ".
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the illustrated embodiments. The lamp (1) used in this embodiment is a double tube composed of an inner lamp (10) and an outer envelope (11), and the inner lamp (10) is a discharge lamp or a halogen lamp. . In the figure, it is a discharge lamp. Hereinafter, the discharge lamp will be described as a representative example of the inner lamp (10). The inner lamp (10) extends from the hollow spheroid or hollow sphere-shaped arc tube portion (12) and the sealing portions (13) (14) extending on both sides thereof, and one of the sealing portions (13). And mounting leg portions (13a). Metal foils (15) and (16) are embedded in the sealing portions (13) and (14), and a pair of electrodes (17) and (18) extending into the arc tube portion (12) is provided at one end thereof. The other ends are welded with external lead rods (19) and (20) extending outward from the sealing portions (13) and (14).
[0013]
The inner lamp (10) is inserted into the outer envelope (11) and integrated at the upper end (21) and the recess-side lower end (22) of the outer envelope (11). Concave portions (8) are formed (one to a plurality of locations) on the outer periphery of the portion fused to the inner lamp (10) of (22). Of course, a recess (8) may be formed on the outer periphery other than the fused portion. Both the inner lamp (10) and the outer envelope (11) are made of quartz glass.
[0014]
Next, a first embodiment (see FIGS. 1 to 6) of the fixture (3) will be described. The fixing bracket (3) of the first embodiment has a narrow width (in other words, a width smaller than the concave portion (8)) or a certain width (in other words, a width smaller than the concave portion (8)). It is composed of a cylindrical metal fitting body (3a) and a protrusion (4). The case where the width is narrow is the case as shown in FIG. 9, and the case where the width is somewhat cylindrical is the case as shown in FIG. The fixing bracket (3) of the first embodiment will be described as a representative example of a cylindrical shape having a certain width. Further, the shape of the protruding portion (4) is not particularly limited, but a protruding shape (not shown) protruding radially from the outer surface of the metal fitting body (3a), FIG. 2 (a) (b) As shown in FIG. 4, there is a bowl-shaped member protruding from the upper end (of course, the lower end or an intermediate portion thereof) of the metal fitting body (3a). Moreover, there are a protrusion (4) having no irregularities on the outer edge and a modification having a protrusion (4b) “or a notch groove (4a)”. In either case, a projecting portion (4) projects from the upper end (or the lower end or an intermediate portion thereof) of the annular or cylindrical metal fitting body (3a) all around or from a part thereof.
[0015]
A fixing piece (9) is formed on the side wall of the cylindrical metal fitting (3a) having a width wider than that of the recess (8) so as to match the recess (8) of the outer envelope (11). The case of FIG. 6 is one example, and uses a cut-and-raised piece of the window portion (9a) formed on the side wall of the metal fitting body (3a).
[0016]
Next, the plug (2) corresponding to the fixing bracket (3) will be described (see FIGS. 1 to 5). This plug (2) “same as in the second embodiment” is formed of a thermoplastic resin, and as its basic shape, a cylindrical main body (2a) and a flange (2b) protruding from the outer periphery of the upper end thereof The metal fitting fixing recess (5) into which the lower end of the double lamp (1) is inserted is formed in the cylindrical main body (2a). As shown in FIGS. 2, 3 (b) and 4 (b), the metal fitting fixing recess (5) is an inner cylinder portion (2k) whose outer periphery is integrally supported by an inner rib (2c). In the case of being configured, and when the fixing bracket (3) is supported by the inner rib (2c) without the inner cylindrical portion (2k) as shown in FIGS. 1, 3 (a), 4 (a) and 5 In any case, the metal fitting fixing recess (5) is a space in which the concave lower end (22) of the double lamp (1) is inserted and the contact portion of the fixing metal fitting (3) is buried and fixed. .
[0017]
In this embodiment, either when the fixing bracket (3) is supported by the inner cylinder portion (2k) or when the fixing bracket (3) is supported by the inner rib (2c) without the inner cylinder portion (2k). The opening portion is cut into a step shape to form a metal fitting fixing step (5b), and the fixing metal fitting (3) is fixed at this portion. Of course, the metal fixture fixing step (5b) may not be provided, and the metal fixture fixing recess (5) may be fixed directly to the inner peripheral surface.
[0018]
Further, an insertion hole for inserting the external lead rod drawn from the upper end (20) adjacent to the bracket fixing recess (5) double lamp (1) (2 g) is formed. Further, a through hole (2h) is formed at the bottom of the plug (2).
[0019]
Next, an assembling method of the lamp device (A) will be described. When the lower end (22) on the concave side of the outer envelope (11) of the double lamp (1) is inserted into the fixing bracket (3), the fixing protruding from the inner side of the bracket main body (3a) of the fixing bracket (3) The piece (9) is fitted into and integrated with the recess (8) of the recess-side lower end (22).
[0020]
Subsequently, the lower end (22) on the concave side of the double lamp (1) to which the fixing metal fitting (3) is attached is inserted into the metal fitting fixing concave portion (5) of the resin plug (2). The protruding part (4) of 3) is positioned in the bracket fixing step (5b). At this time, one external lead rod (19) was inserted into the through hole (2h) at the bottom of the plug (2), and the other external lead rod (20) was bent and erected in the insertion hole (2g). It is inserted through the insulating tube (24) and pulled out from the bottom.
[0021]
In this state, the lamp (1) is turned on and the light (1) is moved in the three-dimensional directions of XYZ while projecting the light onto the front screen, and the double lamp (1) mounted with the fixture (3) is mounted. The light emitting point (P) is positioned at a predetermined height (H) with respect to the reference plane (S) of the plug (2) and passes through the center line (CL) of the plug (2). When the light emission point (P) coincides with a predetermined position, that is, when the projection state of the screen is the most preferable state, the double lamp (1) is stopped and held, and in this state, the protrusion of the fixing bracket (3) (4) is subjected to high frequency induction heating. (Of course, the heating means is not limited to high-frequency induction heating, and the contact position with the protruding portion (4) of the resin plug (2) may be directly heated.) Thus, the inner cylinder in contact with the protruding portion (4) The inner peripheral surface of the step (5b) for fixing the stepped metal fitting of the step (2k) or the inner rib (2c) is heated and softened and deformed. The protruding portion (4) is sandwiched (or embedded) between the deformed portions (6), and the deformed portion (6) is cooled and solidified to firmly hold the protruding portion (4) in a predetermined position. .
[0022]
The deformed portion (6) is cooled and solidified by stopping heating of the projecting portion (4) or stopping heating of the plug (2), and the projecting portion (4) is rapidly held. Therefore, the position adjustment of the lamp (1) and the fixing to the plug (2) are performed very simply and quickly, and the assembly work efficiency is greatly improved. Since the protrusion (4) is made of a thin metal member, the heat capacity is small and it is easy to raise and cool. Therefore, the resin portion at a necessary location can be softened and cooled in a very short time, and the fixing operation of the protruding portion (4) can be performed quickly.
[0023]
When the protrusion (4b) is formed on the protrusion (4) as shown in FIG. 2 (b), the protrusion (4b) portion is a step of the inner cylinder (2k) or the inner rib (2c) in contact with the protrusion (4b). The inner periphery of the metal fitting fixing step (5b) is heated and softened in the form of dots and deformed. As described above, the protrusion (4b) is sandwiched between the deformed portions (6), and the deformed portion (6) is cooled and solidified to be firmly held at a predetermined position.
[0024]
FIGS. 7 to 9 show a second embodiment of the fixing metal fitting (3), in which a narrow metal strip is formed in a ring shape to form a metal fitting body (3a) and one end thereof is bent into a U-shape. Thus, a bent portion (3c) for imparting spring properties is formed, and an extended piece portion (3d) for spot welding is formed at the other end. Further, a pair of left and right projecting portions (4) are provided so as to project from the arc portion of the metal fitting body (3a). As described above, the protrusion (4) has no irregularities on the outer edge (not shown), and there are a plurality of notches (4a) or protrusions (4b) formed on the outer edge. A typical example is the formation of a notch (4a). When a plurality of cutout grooves (4a) are formed on the outer peripheral surface of the protrusion (4) in this way, the cutout grooves are formed on the inner peripheral surface of the metal fitting fixing recess (5) of the resin plug (2). The thermal deformation projection (5a) that fits into (4a) is projected. Since the width of the fixing bracket (3) is slightly narrower than the concave portion (8), when the fixing bracket (3) is attached to the concave portion (8) by spot welding, the concave portion (8) fits in the entire periphery, and the concave portion (8) Fixed inside.
[0025]
Then, after inserting the concave side lower end (22) to the bracket fixing recess (5) in as described above, double lamp (1) is moved in three-dimensional directions of XYZ, the fixing bracket at the optimum position (3) is subjected to high frequency induction heating, and as shown in the enlarged perspective view of FIG. 7, the contact portion of the thermal deformation protrusion (5a) that contacts the notch groove (4a) is thermally deformed, and the deformation portion (6) The peripheral portion of the notch groove (4a) is embedded, and the protrusion (4) is firmly held at the optimum position.
[0026]
【The invention's effect】
According to the present invention, the mounting of the double lamp to the thermoplastic resin plug is performed by the metal fixing bracket having the protruding portion protruding, so that the light emitting point of the double lamp with respect to the reference position of the resin plug is determined. After adjusting the position, the protrusion can be firmly fixed to the plug by simply heating and cooling the protrusion or the vicinity of the double plug where the protrusion is located. Position adjustment and installation work can be performed in a very short time. Further, if “high-frequency heating” is used as the heating means, the protruding portion of the metal fixture can be efficiently heated, and the mounting operation can be completed more accurately and quickly.
[0027]
Furthermore, since the double lamp is fixed to the resin plug via a fixing bracket attached to a recess formed on the outer periphery of the outer envelope, repeated thermal expansion and contraction occur due to external vibration and repeated lighting and extinction. Even if the fixing bracket does not deviate from the concave portion, the holding portion is not damaged.
[Brief description of the drawings]
1 is a central sectional view of a first embodiment of a lamp device according to the present invention. FIG. 2 is an exploded perspective view of FIG. 1. FIG. 3 is a plan view of FIG. FIG. 5 is a central sectional view of FIG. 4 (a). FIG. 6 is a central sectional view of a fixing bracket used in the present invention. FIG. 7 is a plan view of a second embodiment of a lamp device according to the present invention. [Fig. 9] Fig. 9 is a central sectional view of Fig. 7. Fig. 9 is an exploded perspective view of Fig. 8. Fig. 10 is a partial central sectional view of a conventional example.
(A) ... Lamp device
(P) ... Light emission point
(1)… Double lamp
(2)… Plug made of thermoplastic resin
(3)… Fixing bracket
(4)… Projection
(5)… Recess for fixing the bracket
(6)… deformed part
(8)… Recess
(10)… Inner lamp
(11)… Outer envelope
(12)… arc tube
(13)… Sealing part
(13a)… Mounting leg
(14)… Sealing part

Claims (3)

(a) An inner lamp having a sealing portion formed at both ends of the arc tube portion, and an attachment leg extending from one sealing portion, and an outer envelope containing the inner lamp, A double lamp in which a recess is formed on the outer periphery of the outer envelope on the mounting leg side of the lamp;
(b) a fixing bracket attached so as to surround the concave portion of the outer envelope;
(c) a lamp device comprising a thermoplastic resin plug in which a metal fitting fixing concave portion into which a lower end portion on the concave portion side of the double lamp is inserted is formed;
(d) The fixing metal fitting is an annular or cylindrical metal fitting body fixed to the concave portion of the outer envelope, and a protrusion protruding from the metal fitting main body and embedded in the metal fitting fixing concave portion by thermal deformation. lamp apparatus characterized by being composed of a. A heat deformation protrusion is formed on an inner peripheral surface of the metal fitting fixing recess so as to thermally deform a contact portion with the protrusion and bury the protrusion in the heat deformation portion. Item 2. The lamp device according to Item 1. (a)   The inner lamp includes an inner lamp having sealing portions formed at both ends of the arc tube portion, and mounting legs extending from one sealing portion, and an outer envelope containing the inner lamp. A double lamp in which a recess is formed on the outer periphery of the outer envelope on the leg side;
(b)   A fixing bracket attached so as to surround the concave portion of the outer envelope;
(c)   A lamp device comprising a thermoplastic resin plug in which a fitting fixing concave portion into which a lower end portion on the concave portion side of a double lamp is inserted is formed;
(d)   The fixing metal fitting protrudes on the inner surface of the metal fitting fixing concave portion at the outer edge of the annular or cylindrical metal fitting main body fixed to the concave portion of the outer envelope and the protruding portion protruding from the metal fitting main body. A lamp device comprising: a plurality of notch grooves which are fitted into a thermal deformation protrusion and thermally deformed at a contact portion of the thermal deformation protrusion to be embedded in the thermal deformation portion.

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