KR930005307Y1 - Lamp assembly - Google Patents

Abstract

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Description

Lamp assembly

1 is an exploded perspective view of a halogen group incandescent lamp lamp assembly of the embodiment according to the present invention.

FIG. 2 is a perspective view showing a state in which the lamp assembly of FIG. 1 is assembled. FIG.

3 is a side cross-sectional view of the lamp assembly of FIG.

4 is an enlarged plan view of the retaining band and the first connector coupled to each other in a proper correlation position in the lamp assembly of FIG.

5 is a cross-sectional view of the first connector and the holding band taken along the line V-V of FIG.

FIG. 6 is a view similar to the lamp assembly of FIG. 3 with a slight modification of the embodiment of FIGS.

7 is an exploded perspective view of another halogen group incandescent lamp lamp assembly constructed in accordance with the principles of the present invention.

8 is a perspective view showing the assembly of the lamp assembly of FIG.

9 is a side cross-sectional view of the lamp assembly of FIG.

10 is an enlarged exploded perspective view of the retaining band and the first connector used in the lamp assembly of FIG.

FIG. 11 is an enlarged plan view showing an assembled state of the holding band and the first connector of FIG. 10; FIG.

FIG. 12 is a sectional view of the retaining band and the first connector taken along line VII-VII of FIG. 11. FIG.

FIG. 13 is an enlarged partial front view showing one bulb clamping piece on the holding band of FIGS.

14 is an enlarged front view of a second connector used in the lamp assembly of FIGS.

FIG. 15 is an exploded perspective view of another lamp assembly slightly modified from the embodiment of FIGS. 7-14.

FIG. 16 is a side cross-sectional view of the lamp assembly of FIG. 15. FIG.

* Explanation of symbols for main parts of the drawings

1: lamp assembly 3: glass sphere

4 bulb base 12 retaining band

14, 14 ', 15, 15': bulb clamp 16: first metal connector

18: support wall 22: partition wall

27: main part 30: second metal connector

34: blade type terminal 35: fixed lug

37 connector 38 adhesive layer

The present invention relates to a light bulb device, and more particularly to a lamp assembly consisting of a bulb and bulb holder assembly for an automobile headlight. More specifically, the present invention relates to a lamp assembly having an improved device capable of accurately mounting a bulb, such as a halogen incandescent bulb, on a holding body made of plastic material.

In incandescent light bulb assemblies for automobile headlights, it is known that the glass sphere is fixed to the reflector by actually holding the plastic molded tubular holding body. The holding body is molded of plastic for close contact between the holding body and the reflector due to the accuracy of the dimensions obtained and the flexibility of the plastic. In addition, special consideration is needed to keep the bulbs made of glass material in the plastic holding body. In general, a metal retaining band is wound around the sealed base of the glass sphere for this purpose and elastically engages the bulb base by opposing pairs of bulb pinching pieces formed in one of the retaining bands. The holding band is plasma-welded to a tubular metal connector firmly bonded to the plastic holding body. Accordingly, it can be seen that the bulb bulb has been supported by the plastic holding body through two metal members, namely, the holding band and the connector.

There is also a problem in the selection of the material for making the two metallic members. The retaining band, one of the two members in question, must be elastically coupled to the bulb base through a self biased sandwich piece integrally formed therein. Therefore, a highly elastic material needs to be the material for the holding band first. If only elasticity is discussed, nickel silver is the most preferred material for the holding band.

However, when made of nickel silver, the holding band has a problem that even if the connector is made of a weldable material, it cannot be firmly coupled to the connector by plasma welding.

Stainless alloy steels of any particular composition may be more suitable for plasma welding. When made of such a material, the retaining band can be welded to the connector but lacks elasticity. This prevents the holding band from holding the bulb bulbs upright and in the worst case can crack or break the bulb base.

It is an object of the present invention to provide a means for firmly holding a bulb bulb of a glass material as a holding body made of a plastic material without problems which have been discussed so far in the lamp assembly of the type described above.

In short, a lamp assembly for application to automotive headlights or other applications according to the present disclosure includes a retaining band for fixing the bulb bulb by elastic coupling with the bulb base with the bulb bulb, which retains the bulb bulb. It is made of a first metal with sufficient elasticity to be securely fixed. By spot welding, a first connector made of a second metal is welded to the holding band. This second metal is made of a material sufficient for the first connector to be reliably welded to the holding band. The weldable second connector is also floatingly coupled to the tubular plastic molded retainer and also welded to the first connector.

Therefore, the bulb bulb can be accurately fixed to the plastic holding body through the holding band and the first and second connectors.

Nickel silver is particularly preferable as a material of the holding band. When made of nickel, the retaining band is integrally formed with it and can be firmly fixed to the base of the bulb by opposing pairs of bulb clamping pieces which are magnetically deflected to elastically engage the bulb base. The high elasticity of nickel silver has the additional purpose of preventing the bulb base from being damaged by the bulb clamping piece during assembly or use of the lamp assembly. The reason why nickel is selected is that it has good thermal conductivity. The retaining band effectively dissipates the heat generated by the bulb during use of the lamp assembly.

Suitable materials for the first and second connectors are stainless steel, in particular austenite steel with any particular composition to be described later. The first connector made of stainless steel can be easily coupled to the retaining band of nickel silver by spot welding.

In addition, the first and second connectors made of stainless steel are reliably plasma welded to each other. Experiments have demonstrated that the present design significantly reduces the mechanical failure rate between the glass sphere and the plastic holding body.

The above and other features and advantages of the present invention will be described in detail with reference to the preferred embodiments according to the accompanying drawings. According to FIGS. 1 to 3, the present invention is described by applying the halogen group incandescent lamp assembly 1 for use in automobile headlights. The lamp assembly 1 comprises a double filament bulb 2 with a glass sphere 3 of a suitable high temperature material. The glass sphere 3 has a flat bulb base 4 formed at one end by pinch sealing and an exhaust port 5 at the other end. Both ends are sealed, and the glass sphere 3 is filled with a predetermined amount of halogen together with a suitable filling pressure and a suitable inert gas.

Reference numeral 6 is a pair of lead wires extending through the base 4 of the glass sphere 3. The glass bridge 7 in the bulb sphere 3 can hold two pairs of lead wires 6 in a line defined position so that two filaments 8 can be placed at positions spaced at pre-assigned intervals, each filament Is connected between the ends of the pair of lead wires 6. The lead wire 6 has a part which protrudes below or behind the bulb base 4.

As best seen in FIG. 1, the base 4 of the bulb bulb 3 has an I-shaped cross section comprising a pair of relatively extended side flanges 9. 1 and 3 show that the web portion of the bulb base portion 4 has a pair of small engaging protrusions 10 formed on both sides in the width direction.

Coupling protrusion 10 is a coupling portion of the bulb base (4).

Reference numeral 11 in FIGS. 1 to 3 denotes a bulb holding assembly for holding the incandescent bulb 2 firmly. In general, as illustrated in FIG. 1, the bulb retaining assembly 11 is strongly disc coupled to the metal retaining band 12, the retaining band 12, which encloses the bulb base 4 and is securely coupled thereto. The holding band 12 is held by the first metal connector 16, a generally tubular retaining body 21 of a rigid plastic material to be mounted in an automobile headlight housing (not shown), and a first metal connector 16. And a tubular second metal connector 30 for firmly connecting to 21). The main components 12, 16, 21 and 30 of the bulb retaining assembly 11 will then be described in detail.

Although the retaining band 12 is shown in FIGS. 1 to 3, the retaining band 12 is enlarged and illustrated in FIGS. 4 and 5 in conjunction with the first metal connector 16. The retaining band 12 has a generally tubular or box-shaped portion 13 that is open at both ends and will be assembled with the bulb base 4. The tubular portion 13 has two pairs of elastic U-shaped bulb clamping pieces 14 or 14 'that extend in the forward direction opposite the long side to protrude to both sides of the web portion of the bulb base 4. Each pair of bulb clamping pieces 14 or 14 'is dimensioned to fit snugly between the pairs of flanges 9 of the bulb base 4 and are spaced from each other.

The tubular portion 13 of the retaining band 12 is formed at approximately the center of the broad side of the opposite phase and usually extends inwardly and rearwardly and lies almost parallel to the surface of the bulb base 4 and (15a) and ( It is formed to include two other pairs of bulb clamping pieces 15 and 15 'ending with 15'a). These tips 15a and 15'a of the bulb clamping pieces 15a and 15 'are firmly engaged with the pair of engaging protrusions 10 on both sides of the bulb base 4.

In the holding band 12 of the above-described configuration, both the front pair of bulb clamping pieces 14 and 14 'and the rear pair of bulb clamping pieces 15a and 15' both securely hold the bulb. It should be biased elastically with respect to the flat base 4 of the incandescent bulb 2 with its own bias.

Therefore, nickel silver is proposed as a material of the holding band 12 not only in terms of good thermal conductivity, but also in terms of high elasticity. Nickel is, as is well known, a nonferrous alloy of zinc, nickel and copper similar in appearance to silver. Particularly preferred nickel silver components for the purposes of the present invention are about 61-67% copper, 16.519.5% nickel less than 0.1% lead, less than 0.25% iron, less than 0.5% manganese and the remaining percentage zinc. . Brass, i.e., copper zinc alloy, is another example of a material that can be used to make a holding band that meets the requirements of the present invention.

The first metal connector 16, which is usually disk-shaped, has a rectangular attachment hole 17 formed at an inner center thereof. This attachment port 17 is dimensioned and shaped to receive the tubular portion 13 of the retaining band 12 very closely. The pair of support walls 18 extend at right angles and in the forward direction to the pair of opposing long sides delimiting the attachments 17.

As shown in FIG. 5, the retaining band 12 is inserted into the attachment port 17 of the first connector 16 until the pair of flanges at its rear end abut the connector. The pair of support walls 18 are fixed to the pair of wide walls of the tubular portion 13 by spot welding, in particular plasma welding. Thus, the holding band 12 and the first connector 16 are firmly coupled to each other in the state of FIG.

In FIG. 4, four attachment holes 19 are shown in the present embodiment, which are formed in the peripheral space of the first connector 16 by punching. A plurality of attachment pieces 20 are formed one by one adjacent to the support wall 18 by bending the punched portion of the first connector 16 forward.

High elasticity is not an essential attribute of the material of the first connector 16. Rather, the first connector should be able to be easily and firmly welded not only to the holding band 12 but also to the second metal connector 30. Stainless steel is preferred as the material of the first connector 16 in view of its good weldability. In addition to iron, stainless steels containing chromium and nickel will better serve their intended purpose than other types of stainless steel. Currently preferred components are 18-20% chromium, 8-10.5% nickel, 0.08% or less carbon, 1.0% or less silicon, 2.0% or less manganese, 0.045% or less phosphorus, 0.03% or less sulfur, and The rest is iron.

As can be seen in FIGS. 2 and 3, the bulb 2 is held by the retaining band 12 by inserting the bulb base 4 into the tubular portion 13 of the retaining band. When the bulb base 4 is fully inserted into the retaining band 12, the two pairs of bulb clamping pieces 14 and 14 ′ are directed toward opposite sides of the web portion of the bulb base 4 and of the bulb bulb 3. Pressed towards the base end. In addition, the other two pairs of clamping pieces 15 and 15 'on the retaining band engage and lock with the bulb base 4.

Thus, it can be seen that the holding band 12 firmly holds the incandescent lamp 2 against the possibility of accidental detachment or detachment.

The generally tubular holding body 21, preferably formed of thermoplastic synthetic resin, has a partition 22 that forms the boundary between the front body portion 23 and the rear body portion 24 in FIG. The front body portion 23 mainly serves to support the incandescent bulb 2, while the rear body portion 24 serves as a connector for the incandescent bulb. The holding body 21 has a flange 26 at a substantially central portion in the longitudinal direction thereof. A plurality of flanges 26, in this embodiment, are formed at predetermined angular positions on the flange 26 for use in mounting the lamp assembly 1 to the lamp housing, not shown in the exact angular position around the lamp axial direction. The openings have recessed portions 27, which are shown only two in FIGS. 1 and 2.

The annular groove 28 formed on the outer surface of the main body 21 is located forward from the flange 26, and a zero ring seal 29 is fitted into and fixed to the groove 28.

This seal seals the seam between the lamp assembly 1 and the lamp housing (not shown) and contributes to waterproofing.

As shown in FIGS. 1 to 3, the second metal connector 20 has an outer shape and an outer diameter so as to be closely embedded in the front part 23 of the holding body 21, and holds the incandescent lamp 2. It contributes to the mechanical connection to (21). When welding to the first connector 16, the second connector 30 should be made of a weldable metal such as stainless steel. Thus, in practice, the second connector 30 can be made of the same material as the first connector 16.

As noted in FIG. 1, the second connector 30 may be formed by bending a strip or strip of stainless steel sheet in a tubular shape to bend and fold the opposite ends of the strip.

In the present embodiment, four connector flanges 31 having forward ends 32 accommodated in respective attachment holes 19 in the first metal connector 16 are forward from the front of the second connector 30. And stretches into the interior. An appropriate number (eg three) of holes 33 are formed at intervals around the second connector for the purpose described later.

As shown in FIGS. 2 and 3, after the second connector 30 is installed in the front part 23 of the holding body 21, the holding body may be heated by high frequency induction heating. Next, because it is a plastic resin, the holding body melts and partially flows into the hole 33 of the second connector 30 to fix the second connector at a predetermined position in the holding body.

In FIG. 1 and FIG. 2, three blade-type terminals 34 are provided in the rear part 24 of the holding body 21. As shown in FIG. Each terminal 34 has a mounting projection 35 bent at right angles therefrom. Each mounting projection 35 has a hole 36. The adjoining portions of the mounting projection 35 and the terminal 34 are centered on the partition wall 22 of the holding body 21, that is, the holes 36 of the mounting projection 35 are centered with the respective taper holes 25 on the partition wall. It is buried at that position on the corresponding bulkhead. Through the hole 25 in the partition 22, the conducting wire 37 is received at one end in the hole 36 and welded to the installation protrusion 35. As shown in FIG.

Attaching the first connector (16) to the retaining band (12) from the front. The method of installing this holding band in the base part 4 of the incandescent lamp 2 and the method of installing the 2nd connector 30 in the front part 23 of the holding body 21 were demonstrated. Next, a method of connecting the subassembly of the incandescent lamp 2, the holding band 12 and the first connector 16 to the subassembly of the holding body 21 and the second connector 30 will be described.

The tip 32 of the finger 31 in the second connector 30 is first inserted into each attachment port 19 in the first connector 16. The attachment port 19 is large enough to accommodate the finger tip 32 and there is a gap allowing the rotation of the retaining body 21 with respect to the leukocyte bulb 2. Thus, the incandescent bulb 2 and the holding body 21 are manually rotated with each other until the bulb filament 8 is accurately positioned with respect to the positioning request 27 in the holding body flange 26. The finger tip 32 of the second connector 30 is then plasma welded to the attachment piece 20 in the first connector 16. The two connectors 16 and 30 will be firmly welded to each other since both are made of stainless steel. The bulb 2 is now securely mounted to the holding body 21 by the holding band 12 and the first and second connectors 16 and 30.

The lead wire 6 extending outward from the bulb base 4 is integrated into the connector 37 as conventionally by soldering. It is proposed to solder by high frequency induction heating.

Second Embodiment

FIG. 6 shows a slight modification to the embodiment of FIGS. 1 to 5. The deformed lamp assembly is characterized by a layer of adhesive material 38 so that the adhesive material layer 38 is soldered to the mounting projection 35 of the blade-type terminal 34 and then rear of the holding body 21. The portion 24 is filled with an adhesive and formed on the rear portion 24 of the holding body 21.

The adhesive layer 38 is intended to improve the waterproofness of the lamp assembly 1 and to hold the terminal 34 firmly in place in the holding body 21.

Third Embodiment

7 to 9 show a halogen group incandescent lamp assembly 39 constituting a third embodiment of the present invention. The incandescent bulb 2 of the lamp assembly 39 has the same configuration as the bulb 2 of the lamp assembly 1 of FIGS. 1 to 5.

The bulb holding assembly for clamping the incandescent bulb 2 is indicated by reference numeral 40 in FIGS. 7 to 9. As in the embodiment of FIGS. 1 to 5, the bulb holding assembly 40 has a rigid plastic retainer having the same configuration as the embodiment of the metal retaining band 41, the first metal connector 50, and FIGS. The main body 21 and the 2nd metal connector 57 are comprised.

10 to 12 show the retaining band 41 shown enlarged jointly with the first connector 50. The holding band 41 made of nickel silver or similar elastic metal has a generally rectangular cross section, and has a portion 42 having two pairs of opposite U-shaped bulb clamping pieces 43 and 43 'formed in front thereof. Have These bulb clamping pieces 43 and 43 'are elastically held relative to both sides of the web portion of the bulb base 4 under its own bias. A pair of recessed portions 44 are formed on both sides of each bulb clamping piece 43 or 43 'at the front end of the holding band 41. These recesses 44 contribute to increasing the length of the bulb clamping pieces 43 and 43 'and therefore increasing their elasticity. As shown in FIG. 10, the edges 43a and 43'a of the tips of the bulb clamping pieces 43 and 43 'in contact with the side edges 9 of the bulb base 4 do not damage the side edges. So that it is rounded. Two opposite pairs of bulb sandwiching pieces 45 and 45 'are formed at the rear of the sandwiching pieces 43 and 43' so as to extend inwardly and rearwardly from the walls on both sides of the retaining band 41, and side by side. Ends with bent tips 45a and 45'a. These tips of the sandwich pieces 45 and 45 'will also be firmly engaged with the engaging projections 10 formed on the bulb base and will remain elastic on both sides of the bulb base 4.

As enlarged in FIG. 13, the above-described bulb clamping pieces 43, 43 ', 45 and 45' have a burr 46 which is generated when nickel is punched into the sheet to make such clamping pieces. The direction of such punching and, as described above, the direction of the clamping piece when bending them should be determined so that the burr 46 does not contact the bulb base 4.

The opposing pair of wide sides 48 and 48 'of the retaining band 41 has a pair of flanges 47 and 47' bent at right angles outward therefrom. The wide sides 48 and 48 'of the support band 41 are formed to include a relatively small pair of bosses 49 and 49' positioned adjacent to the rear end of the support band.

The first connector 50 made of weldable metal, such as stainless steel, such as the first connector 16 in the above-described embodiment may receive the tubular portion 42 of the retaining band 42 relatively close. The opening 51 having a size and shape of the degree is in the form of a disk formed in the center. The pair of support walls 52 extend forward and at right angles from the pair of opposed long edges facing the opening 51. The right support wall 52 forms a groove 53 at the center thereof to engage any one of the bosses 49 and 49 'on the retaining band 41.

As is clearly shown in FIG. 12, the tubular portion 42 of the retaining band 41 is provided with a first connector 50 until the pair of flanges 47 and 47 'of the retaining band are in contact with the first connector. In the opening 51). The pair of bosses 49 and 49 'on the wide sidewalls 48 and 48' of the retaining band 41 may be sufficient to ensure that the conduit 42 of the retaining band has been fully inserted into the first connector opening 51. The first connector 50 is coupled to the hole 53 in the support wall 52. Therefore, the retaining band 41 and the first connector 50 are suitably positioned with each other and are integrally coupled to each other by spot welding. The two parts 41 and 50 are easily and firmly welded to each other since the first connector 50 is made of a very easy-to-weld metal such as stainless steel.

Claims (1)

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