JP2004247132A - Lamp device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp device capable of securely preventing an abnormal discharge by completely covering at least any one of outer lead wires. <P>SOLUTION: The lamp device A1 is composed of a lamp main body a1 of a double-end type with the outer lead wires 35b, 36b guided out of sealing parts 7, 8 of a light-emitting tube part 30a, a lamp base 2 mounted on an end of the lamp main body a1, and outer conductive wires 26, 27 individually connected to the high-voltage-side outer lead wire 35b guided out of a base-mounting end a11 of the lamp main body a1 and the low-voltage-side lead wire 36b guided out of the other end of the main body a1 and arranged along the main body a1. An exposed part 35d of the high-voltage-side lead wire 35b exposed between an insulation coating 26b of the high-voltage-side outer conductive wire 26 and the base-mounting end a11 superposed on the insulation coating 26b of the outer conductive wire 26 connected to the high-voltage-side lead wire 35b and the base-mounting end a11 of the lamp main body a1 is surrounded by an insulation member 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lamp device with a base, such as a discharge lamp used for general lighting, optical equipment, or a vehicle lamp.
[0002]
[Prior art]
Recently, metal halide lamps or high-pressure discharge lamps that emit brighter light have been used as light sources for various devices including headlights. Conventionally, this kind of lamp device has to apply a high voltage at the time of starting to cause dielectric breakdown between electrodes. However, in a lamp device of a type using a base, external lead wires derived from the lamp body are connected to external electric wires at positions close to each other. Therefore, each of the external lead wires is kept insulated between the external lead wires by attaching a ceramic insulating tube, etc., but still passes through a slight gap and the conductive members such as the electrodes of the lamp body and the external lead wires. In some cases, abnormal discharge of current occurs between the wires or external leads, causing a lighting failure.
[0003]
An example in which one external lead wire is covered with a thick ceramic tube such as aluminum oxide is described in US Pat. No. 5,250,872.
[0004]
[Prior art documents]
[0005]
[U.S. Pat. No. 5,250,872]
[0006]
[Problems to be solved by the invention]
An object of the present invention is to develop a lamp device that can reliably prevent abnormal discharge that has occurred even from a small gap by completely covering at least one of the external lead wires with an insulator.
[0007]
[Means for Solving the Problems]
The first aspect of the present invention relates to a double-end type lamp device (A1) according to the present embodiment, which relates to "from a sealing portion (7) (8) provided on both sides of an arc tube portion (30a)" to an external lead wire. (35b) A double-end type lamp body (a1) from which (36b) is led out, a base (2) mounted on one end of the lamp body (a1), and a base mounting end of the lamp body (a1). a11) and a low-voltage side external lead wire (36b) led out from the other end of the lamp body (a1) and disposed along the lamp body (a1) and a base (35). 2) A lamp device (A1) composed of external conductors (26) and (27) individually connected inside,
The insulating cover (26b) of the external conductor (26) connected to the high-voltage external lead (35b) and the base mounting end (a11) of the lamp body (a1) overlap with each other to insulate the high-voltage external conductor (26). The exposed portion (35d) of the high-voltage side external lead wire (35b) exposed between the coating (26b) and the base mounting end (a11) of the lamp body (a1) is surrounded by the insulating member (10). It is characterized.
[0008]
The invention according to claim 2 relates to another example of the double-end type lamp device (A1) according to the present embodiment, which relates to "sealing portions (7) (8) provided on both sides of the arc tube portion (30a). , An external lead wire (35b) (36b) is led out of the lamp body (a1), a base (2) attached to one end of the lamp body (a1), and a lamp body (a1). An insulating tube (6), which covers an external lead wire (36b) led out from one end and one end of which is disposed in the base (2), and the external lead wires (35b) (36b) in the base (2). ) Is a lamp device (A1) composed of external wires (26) and (27) individually connected to each other,
In at least one of the external lead wires (35b) and (36b), the insulation coating of the external conductor (26) connected to the external lead wire (35b) on the lamp body (a1) side in the base (2). 26b) and the insulation coating (27b) of the external conductor (27) that overlaps with the base mounting end (a11) of the lamp body (a1) or is connected to the external lead wire (36b) on the insulating tube (6) side. And the insertion end of the insulating tube (6), and is exposed between the insulating coating (26b) of the external conductor (26) on the lamp body (a1) side and the base mounting end (a11) of the lamp body (a1). Exposed between the exposed portion (35d) of the external lead wire (35b) and / or the insulating coating (27b) of the external conductor (27) on the side of the insulating tube (6) and the insertion end of the insulating tube (6). Exposed external lead wire (36b) Min (36d) is characterized insulating member (10) is surrounded by "things.
[0009]
The third aspect of the present invention relates to the single-end type lamp device (A2) according to the present embodiment, which relates to "a sealing portion (7) (8) provided on one side of an arc tube portion (30a)" and an external lead wire. (35b) A lamp device comprising a single-end type lamp body (a2) from which (36b) is led out, and a base (2) attached to a sealing portion (11) of the lamp body (a2) ( A2)
In at least one of the external lead wires (35b) and (36b),
The external lead wire (35b) exposed in the base (2) between the base mounting end (a11) of the lamp body (a1) and the insulating coatings (26b) (27b) of the external conductors (26) and (27). The insulating member (10) in which the exposed portions (35d) and (36d) of (36b) are overlapped with the base mounting end (a11) of the lamp body (a1) and the insulating coating of the external conductors (26) and (27). It is surrounded by ".
[0010]
In this case, the exposed portion (35d) or (36d) of the external lead wire (35b) or (36b) in the base (2), which is liable to undergo abnormal discharge with respect to the high voltage at the start, is particularly exposed on the high voltage side. Since (35d) is securely covered with the insulating member (10), abnormality occurs between both external lead wires (35b) and (36b) or between the low voltage side external lead wire (36b) and one high voltage side electrode (33). The occurrence of discharge (R) was reliably prevented, and the lighting failure was eliminated.
[0011]
The lamp device (A) according to claim 4 is that the lamp body (a1) (a2) is composed of the inner bulb (3) and the outer bulb (4) surrounding the inner bulb (3). [(A virtual line in FIGS. 1, 2 and 5 and FIG. 4)], the lamp device (A) of “Claim 5” is “a single tube having a lamp body (a1) (a2) without an outer bulb (4)”. (3 ′) ”((solid lines in FIGS. 3 and 4)).
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a lamp device (A1) according to an embodiment of the present invention. Here, a lamp device (A1) used as a light source such as a headlight of an automobile is exemplified. I do not care.
[0013]
The lamp device (A1) generally includes a reflector (1), a base (2), an inner bulb (3) for light emission, an outer bulb (4), an external lead wire (36b), and an insulation for covering the external lead wire. (When a high voltage is applied to the external lead wire (35b) side of the lamp body (a1) side, the high voltage side external lead wire (35b) is reliably insulated. However, the insulating tube (6) is not necessarily required, and a case where the insulating tube (6) is used will be described as a typical example.)
[0014]
The reflector (1) is made of a glass material such as an infrared transmitting film or a visible light reflecting film or a polycarbonate, such as polycarbonate, so as to direct light from a light emitting inner bulb to be described later to a front projection unit (not shown) or the like. It is molded into a bowl-shaped widening using natural resin, aluminum, etc. A cylindrical valve insertion hole (1a) is formed at the rear top of the reflector (1), and a larger diameter than the valve insertion hole (1a) is formed at the rear of the valve insertion hole (1a). An engagement step (1b) is formed.
[0015]
The base (2) is made of synthetic resin or metal or the like, and has a valve holding recess (21) dug into the front side of the base (20) and a reflector mounting flange (protrudingly provided on the outer periphery of the base (20)). 22) and a connector part (23) constituting the rear end of the base part (20).
[0016]
A pair of terminal holding holes (24) and (25) are formed on the rear end surface of the connector portion (23), and these terminal holding holes (24) and (25) are respectively connected to external conductors (26) and (27). ) Is inserted. The valve holding concave portion (21) is formed in a circular cylindrical shape.
[0017]
An annular upright wall portion (2a) surrounding the valve holding recess (21) and having an inverted L-shaped cross section is integrally formed on the front side of the base portion (20), and a tip of the annular upright wall portion (2a) has a cross section L The flange portion (2c) is formed integrally, and the flange portion (2c) and the tip portion (2b) of the annular upright wall portion (2a) constitute the reflector mounting flange portion (22). I have. That is, when the distal end portion (2b) of the annular standing wall portion (2a) is inserted into the valve insertion hole (1a) of the reflector (1), the flange portion (2c) engages with the engaging step portion (1b). It is supposed to be.
[0018]
The light-emitting inner bulb (3) includes a cylindrical enclosure (30) made of quartz glass and a pair of electrode mounts (31) and (32). A spherical arc tube part (30a) is formed substantially at the center of the envelope container (30), and a necessary gas (not shown), a metal halide, and a required enclosure such as mercury (not shown) are sealed therein. Both sides of the arc tube part (30a) are sealing parts (7) and (8). On the other hand, the electrode mounts (31) and (32) are composed of electrodes (33) and (34) and conducting members (35) and (36), and the inner ends of both electrodes (33) and (34) are arc tube parts ( 30a) are linearly arranged to face each other.
[0019]
The current-carrying members (35) and (36) are connected to the metal foils (35a) and (36a) connected to the outer ends of the electrodes (33) and (34) and to the outside connected to the outer ends of the metal foils (35a) and (36a). And lead wires (35b) and (36b).
[0020]
The proximal end (3a) and the distal end (3b) of the inner valve (3) are formed on the inner peripheral surfaces of the constricted portions (4c1) and (4c2) of the proximal end (4a) and the distal end (4b) of the outer valve (4). The inner valve (3) is fused and integrated, and the entire inner valve (3) is housed and held in the outer valve (4). The base end (4a) of the outer valve (4) is inserted into the valve holding recess (21) of the base (2), and is fixed around the constricted portion (4c1). At 41), it is mounted in the annular upright wall portion (2a) of the base (2).
[0021]
A substantially C-shaped or zigzag bent portion (35c) as shown in this example is coupled to the outer end of the external lead wire (35b) of the one electrode mount (31) [bent portion (35c)]. Is to prevent the electrode mount (31) from moving when the electrode mount (31) is sealed]. The outer end of the bent portion (35c) is separated from the base end (3a) of the inner valve (3). It extends to the base (2) side and is electrically connected directly or via a conductor to the core wire (26a) of the external conductor (26) by soldering or laser welding.
[0022]
The portions corresponding to the metal foils (35a) and (36a) in the envelope container (30) are inserted into the envelope container (30) by inserting the electrode mounts (31) and (32), and then heated. It is sealed by implementing a shrink or pinch seal. These portions are the sealing portions (7) and (8), and the metal foils (35a) and (36a) are embedded.
[0023]
The outer bulb (4) is for shielding ultraviolet rays and preventing fragments from being scattered when the inner bulb (3) ruptures. The outer bulb (4) is made of cylindrical quartz glass having a larger diameter than the envelope container (30). The inner valve (3) is disposed so as to cover the inner valve (3) from the outer peripheral side. As described above, the base end (4a) of the outer valve (4) is fitted into the valve holding recess (21) of the base (2), and the base (2) of the base (2) is formed by the metal ring (41). It is fixed in the annular upright wall (2a).
[0024]
The external lead wire (35b) of the other electrode mount (32) is led out from the tip (3b) of the inner valve (3), is bent as it is, and is disposed along the outer peripheral surface of the outer valve (4). 5a) extends to the base (2) side and is electrically connected to the conductor (27a) of the other external conductor (27) directly or via a conductor by soldering, laser welding, or the like.
[0025]
The insulating tube (6) is for preventing the occurrence of abnormal discharge which is likely to occur when a high voltage is applied during the initial stage of lighting between the external lead wire (36b) and the electrode mount (31) of the inner bulb (3). The outer lead (36b), which is led out from the tip (3b) of the inner valve (3) and is disposed along the outer valve (4), has one end attached to the base (2). .
[0026]
In the method of assembling the lamp device (A1), the external lead wire (35b) and the core wire (26a) of the external conductor (26) are connected in advance, and the base end (3a) of the inner bulb (3) is connected to the external conductor (26). ), A sheet-shaped insulating member (10) is wound so as to overlap with the end of the insulating coating (26b), and the exposed portion of the external lead wire (35b) from the base end (3a) of the inner valve (3). Insulate the whole. Of course, the insulating member (10) may be in the form of a tube or a shrinkable silicon-based or tetrafluoroethylene-based tube.
[0027]
Here, it is effective to prevent a discharge from occurring in the overlapping portion so that no gap is generated between the insulating member (10) and the base end (3a) of the inner valve (3) or the insulating coating (26b). Alternatively, the two may be bonded using an adhesive. When the external lead wire (35b) on the inner valve (3) side is on the high voltage side, the longer the amount of overlap between the insulating member (10) and the insulating coating (26b) on the external conductor (26) is, the longer the high voltage side is. This is preferable for suppressing abnormal discharge between the lead wire (35b) and the external ground.
[0028]
Subsequently, after attaching the metal ring body (41) to the lamp body (a1), the external conductor (26) is inserted into the terminal holding hole (24) from the bulb holding recess (21) side of the base (2), and Insert the end (6a) of the insulating tube (6) into the insulating tube mounting hole (61) of the base (2). As a result, the metal ring body (41) is located in the bulb holding recess (21) as shown in FIG. 1, and three-dimensionally adjusts the position of the arc tube part (30a) with respect to the base (2) (in other words, When the base (2) is mounted on the reflector (1), the arc tube part (30a) is adjusted to be positioned exactly at the focal point of the reflector (1)), and a metal ring body ( 41) is heated and welded and fixed to the ring-shaped upright wall portion (2a) of the base (2). Finally, the outer lead wire (36b) on the side of the insulating tube (6) and the other lead wire (27a) are connected to the other lead wire (27a) using the through hole (29) provided on the side surface of the base (2) by the above-described method. Electrical connection is made, and finally the through hole (29) is closed with a cap (28) to complete the assembly of the lamp device (A1).
[0029]
At this time, the insulating member (10) is located in one of the terminal holding holes (24) as shown in FIG. 1 and is led out from the sealing portion (7) of the inner valve (3), and the sealing portion (7) The entire exposed portion exposed from the base end portion (3a) of the non-sealing tube portion extending from the outer conductor and reaching the insulating coating (26b) of the external conductor (26) is insulated by the insulating member (10). .
[0030]
When the lamp device (A1) configured as described above is turned on, a high voltage is applied as described above at the time of starting, but the external lead wire (35b) is connected to the external lead wire (26). Since it is insulated over the entire length up to the insulating coating (26b), abnormal discharge does not occur, and stable starting lighting is performed.
[0031]
FIG. 2 is a modified example of FIG. 1 in which the end of the insulating member (10) is attached to the base end (4a) of the outer valve (4) so as to overlap with the case of FIG. A similar effect is obtained.
[0032]
FIG. 3 shows an example in which the same valve as the inner valve (3) is used without using the outer valve (4), and the same operation and effect as in the case of FIG. 1 are produced. The method of attaching the insulating member (10) may be the case of either FIG. 1 or FIG.
[0033]
FIG. 4 shows a case where the lamp body (a2) is a single-end type. In this case as well, at least one of the external lead wires (35b) and / or (36b) is insulated by the insulating member (10). become. However, in the case of the lamp body (a2) of the single-end type, two external leads (35b) and (36b) are led out from the same sealing portion (9), so that the external lead (35b) ( In order to separate the protrusions (9b), the protrusions (9a) and (9b) through which the external lead wires (35b) and (36b) penetrate project from the end of the sealing portion (9). It is necessary to overlap the insulating member (10) with at least one of them. The other points including the double pipe or single pipe are the same as those described in the embodiment of FIG.
[0034]
If the bulb holding recess (21) is densely filled with an adhesive after assembling, there is a further effect of preventing abnormal discharge.
[0035]
【The invention's effect】
The present invention relates to an external lead wire which is led out from a base mounting end of a lamp body and exposes an external lead wire between a base mounting end of a lamp body or an insertion end of an insulating tube and an insulating coating of an external conductor in the base. Since at least one of the portions is covered with the insulating member overlapping the base mounting end or the insertion end and the insulating coating, the discharge path is closed and the withstand voltage becomes sufficient, and even if a slight gap exists. The abnormal discharge that had occurred was reliably prevented, and the lighting start failure was eliminated.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating a lamp device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a main part of a modification of FIG. 1; FIG. 3 is a cross-sectional view of a main part of still another modification of FIG. 1;
FIG. 4 is a sectional view using a single-end type lamp as a lamp body.
FIG. 5 is a sectional view of a main part showing another example of mounting the insulating member.
FIG. 6 is an explanatory diagram when an abnormal discharge occurs in a conventional lamp device.
[Explanation of symbols]
(A1) (a2) ··· Lamp body (a11) ································································································································································································································; (3) ... Inner valve (3a) ... Base end of inner valve (4) ... Outer valve (4a) ... Base end of outer valve (5) ...・ External lead wire (6) ・ ・ ・ ・ ・ ・ ・ Insulation tube (6) (7) ・ ・ ・ ・ ・ ・ Sealing part (26) (27) ・ ・ ・ External terminal piece (30) (30a) ··· Arc tube part (35) (36) · Electric conduction member (35b) (36b) ··· External lead wire

Claims (5)

A double-end type lamp body in which external lead wires are led out of sealing portions provided on both sides of the arc tube portion, a base mounted on one end of the lamp body, and a base mounted on the base body mounting end of the lamp body. A lamp device comprising a high-voltage side external lead wire, a low-voltage side external lead wire led out from the other end of the lamp main body and disposed along the lamp main body, and an external conductor individually connected inside the base. hand,
An external lead that is superimposed on the insulation coating of the external conductor connected to the high-voltage side external lead wire and the base end of the lamp body, and is exposed between the insulation coating of the high-voltage side external lead and the base end of the lamp body. A lamp device, wherein an exposed portion of the wire is surrounded by an insulating member. A double-end type lamp main body in which external lead wires are led out of sealing portions provided on both sides of the arc tube part, a base attached to one end of the lamp main body, and an external lead derived from the other end of the lamp main body. A lamp device comprising an insulating tube covering a lead wire, one end of which is arranged in a base, and an external conductor individually connected to the external lead wire in the base,
In at least one of the external lead wires, in the base, the insulating coating of the external lead wire connected to the external lead wire on the lamp body side overlaps with the base mounting end of the lamp body, or the outside of the insulating tube side. The outer lead wire that is superimposed on the insulating coating of the outer conductor connected to the lead wire and the insertion end of the insulating tube and is exposed between the insulating coating of the outer conductor on the lamp body side and the base mounting end of the lamp body. A lamp device, wherein an exposed portion and / or an exposed portion of an external lead wire exposed between an insulating coating of an external conductor on an insulating tube side and an insertion end of the insulating tube is surrounded by an insulating member. A single-end type lamp body in which a pair of external lead wires are led out of a sealing portion provided on one side of the arc tube portion, a base attached to the sealing portion of the lamp body, and an external lead wire inside the base. A lamp device comprising an external lead wire individually connected to the
In at least one of the external lead wires, the exposed portion of the external lead wire, which is exposed between the base mounting end of the lamp body and the insulating coating of the external conductor in the base, is connected to the end of the lamp body and the outside. A lamp device, wherein the lamp device is surrounded by an insulating member superimposed on an insulating coating of a conductive wire. The lamp device according to any one of claims 1 to 3, wherein the lamp body includes an inner bulb, and an outer bulb and an outer bulb surrounding the inner bulb. The lamp device according to any one of claims 1 to 3, wherein the lamp body is a single tube without an outer bulb.

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