JPH11135078A - Vibration-resistant electric lamp and marker light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration electric lamp which ensures further improvement in vibration resistance and impact resistance by relieving the vibration and impact applied to a leg part through improvement of the constitution of supporting members and the leg part and offer a marker light fitted with such an electric lamp. SOLUTION: A vibration-resistant electric lamp L comprises a glass bulb 1 having a seal part 2 at the end, a pair of seal members 3 sealed airtightly in the seal part 2, supporting members 4 connected with the sealing members 3, a coil-form filament 5 with the leg part 52 connected with the supporting parts 4, and inert gas encapsulated in the bulb 1, wherein connections of the supporting parts 4 with the leg part 52 of the filament 5 are established by winding a coil 41 formed on other member straight on one member and fastening the two with each other. The arrangement according to the present invention further includes a marker lamp in which the electric lamp L is incorporated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light bulb used as a light source for traffic signs and the like, which is required to withstand vibration and shock, and to a sign lamp equipped with the light bulb.

[0002]

2. Description of the Related Art In a halogen bulb, a trace amount of a halogen group element (I, Br, Cl, F) is enclosed in a glass bulb together with an inert gas such as argon, and tungsten and a halogen group element evaporated from a coiled filament are formed. Utilizing the chemical cycling reaction (halogen cycle) between
It is a small, high-efficiency light bulb that returns evaporated tungsten to a filament.

[0003] There are various types of halogen lamps. For a low-voltage, high-current type lamp such as a sign lamp, a single-coil filament wound with a tungsten wire having a relatively large diameter is used as a filament. Have been. The single-coil filament is supported in the bulb because the linear leg extending from both ends of the coil has a relatively large diameter and also serves as an internal lead wire so that the filament is sealed inside the bulb. It is performed by being fixedly connected to a sealing member made of a hermetically sealed molybdenum foil or the like by means of welding or the like.

[0004] However, sign lights and the like embedded in the road, such as at an airport runway or at the separation of roads, are subjected to strong vibration and impact when an airplane lands or an automobile is running. The light-emitting light bulbs arranged in combination also receive vibration and shock.

[0005] When the bulb disposed inside the marker lamp is subjected to strong vibration, stress is applied to the leg supporting the coil-shaped portion although the member constituting the filament is a tungsten wire. Is bent and deformed in an undesired direction to shorten or extend the pitch of the coil-shaped portion, or the coil-shaped portion is shifted from a predetermined position of the reflecting mirror, thereby shortening the life of the light bulb or reducing the brightness, or distributing. There were problems such as light failure.

Therefore, it is conceivable to reinforce a leg portion extending from both ends of the coil-shaped portion. Describes that a sub coil made of a tungsten wire or the like is wound around a leg portion.

[0007] By reinforcing the leg portion of the coiled filament with a sub coil, vibration resistance and impact resistance can be certainly improved. However, in this case, although the cross-sectional area of the leg portion also serving as the internal lead wire increases and the fixing strength increases,
Although the sub coil is a coil-shaped elastic body, its end is embedded in the sealing part together with the leg part, so it has poor flexibility and does not bend depending on the degree of impact, and the part where the sub coil is not wound etc. May cause disconnection.

Means for holding the coiled filament with flexibility corresponding to the above are described in, for example, Japanese Utility Model Registration No. 367508 and Japanese Utility Model Publication No. 50-41724.

According to the description of the former publication, when a coiled filament (incandescent wire) is connected to an internal lead wire (conductive wire), a coil (hot wire) is interposed between the two.
The connections are welded after insertion. However, the coiled filament (incandescent filament) in this case is a filament that is entirely wound in a coil shape and does not have a single wire portion at the end of the filament (filament). By winding a small-diameter incandescent wire that cannot be held in a shape and winding it into a coil shape, the strength can be increased and the wire can be connected.

[0010] Further, a coil existing between the two (producing)
Has the effect of absorbing the vibration from the glass stem (stem tube) and mitigating the mechanical vibration to the filament (incandescent condition), but when vibration is applied,
It can be easily inferred that the filament (incandescent rays) wound with a small diameter incandescent wire is considerably affected.

In the latter publication, there is a description in which a single linear leg (leg) portion of a filament is inserted and fixed in a coil portion of a support. In this case, there is a description that when the coil portion of the support is manufactured, the inner diameter must be tightly connected to the outer diameter of the filament (leg) portion of the filament.

[0012] By simply inserting or winding the leg (leg) portion around the coil portion of the support in a single-line shape, the foot (leg) portion comes out of the coil portion when vibration or impact is applied to the bulb. There is a possibility that conduction becomes impossible and there is a possibility of causing a failure. Especially, in the case of an anti-vibration compatible light bulb, it cannot be applied.

[0013]

Therefore, the present inventors have further studied the reinforcing means in various ways, and have found that the leg portion of the coiled filament is not too strong or, conversely, too loose and has a moderate flexibility. It has been found that reinforcement is used to further improve vibration resistance and impact resistance. The present invention provides a vibration-resistant bulb capable of further improving vibration resistance and impact resistance by improving the configuration of the support member and the leg section to mitigate vibration and impact force applied to the leg section, and a marker light equipped with the bulb. The purpose is to provide.

[0014]

According to a first aspect of the present invention, there is provided an anti-vibration light bulb, comprising: a glass bulb having a sealing portion at an end;
A pair of sealing members hermetically sealed in the sealing portion, a support member disposed in the valve, a support member connected to each sealing member, and a coiled filament having a leg portion connected to the support member, and With the sealed inert gas, the connection between the support member and the leg portion of the coiled filament is performed by winding the coil portion formed on the other member on the straight portion of one member and fixing the both members together. The connection is characterized by the following.

[0015] Even if the light bulb is turned on or off, the leg portion of the filament has a shorter length than the conventional one even if it receives vibration or impact of a weak force to a strong force regardless of whether it is turned on or off. Vibration and shock are absorbed by bending of the coil portion, and strong action is not applied to the leg portion and the coil-shaped portion which is the light emitting portion, so that the leg portion and the coil portion are prevented from being disconnected. .

[0016] Further, the vibration of the leg portion when receiving vibration or impact is suppressed by the corresponding inner wall of the coil portion close to the outer periphery of the leg portion, and the tip of the leg portion is swaged or welded to the coil portion. It is strong against vibration and impact because it is fixed.

The connecting means of the two may be crimped or welded, or may be crimped and further welded.

It is to be noted that the connection between the support member and the leg portion of the filament is such that the coil portion formed on the straight portion of one member is wound on the other member. It means a relative relationship in which a coil portion may be formed on the support member side in a straight shape, or conversely, a coil portion may be formed on the leg portion side in the support member side.

Further, the coil portion surrounding the leg portion of the filament may have a fine pitch or a sparse pitch, and can be appropriately selected according to the condition of the filament.

The vibration-resistant lamp according to the second aspect of the present invention is characterized in that the outer diameter of the support member is larger than the outer diameter of the leg portion of the coiled filament.

In the filament, the coil portion and the leg portion constituting the light emitting portion have the same line and the same outer diameter, and a long leg portion is not preferable because it mainly reduces the luminous efficiency. However, by shortening the length of the leg portion and making the outer diameter of the support wire larger than the outer diameter of the filament wire, the mechanical strength is increased and the electrical resistance is reduced, so that the effect of reducing the loss is exhibited.

The outer diameter of the support member is preferably larger than the outer diameter of the leg portion of the filament. If the magnification is less than 1, there is a problem that even if heat is generated during lighting, the heat is lost and the strength is reduced. In addition, the use of this support member can shorten the length of the leg portion, and can further complement the above-described operation.

According to a third aspect of the present invention, there is provided a vibration-resistant lamp in which a connecting portion between a support member and a leg portion of a coiled filament has a straight portion in a loosely inserted state in the coil portion.

Except for the welded portion, there is a slight gap between the outer periphery of the leg portion and the corresponding inner wall of the coil portion, and the effect of suppressing the swing and movement of the leg portion due to vibration or impact can be suppressed by the inner wall of the coil portion.

The gap between the outer periphery of the leg and the inner wall of the coil may be 0.3 mm or more. The vibration-proof lamp according to claim 4 of the present invention is characterized in that the fixing portion connecting the support member and the leg portion of the coiled filament is a coil portion located closer to the entrance coil portion.

As a result of the leg portion being fixed at the position where the tip end portion has entered the coil portion, the middle portion of the leg portion at the tip end side is subject to vibration or shock when the vibration or impact causes the coil portion to correspond to the outer periphery of the leg portion. It has the effect of being suppressed by the inner wall.

According to a fifth aspect of the present invention, there is provided a marker lamp having a light emitting window, and a reflection lamp housed in the lamp body and provided with the anti-vibration light bulb according to any one of the first to fourth aspects. It is characterized by comprising a mirror and a light control body provided in the light projecting window.

The anti-vibration light bulb having the functions described in the first to fourth aspects is resistant to vibration and impact, does not cause a decrease in light distribution or premature disconnection of the filament, and can provide a marker lamp with a low frequency of bulb replacement.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a one-end sealed halogen lamp L for an aeronautical sign light, and FIGS. 2A and 2B are enlarged cross-sectional views of a main part showing a relationship between a leg portion of a coiled filament and a support member. It is.

In the figure, 1 is a cylindrical valve made of quartz glass, 2 is a crush sealing portion formed at one end of the valve 1,
Reference numeral 11 denotes an exhaust pipe provided at the other end of the valve 1, and reference numerals 3 and 3 denote sealing members hermetically sealed in the crushed sealing portion 2, which are made of molybdenum Mo foil.

Reference numerals 4 and 4 denote molybdenum Mo foils 3 and 3 respectively.
Is a support member that is connected to one end side of the base member by welding or the like and extends into the bulb 1 and serves as an internal lead wire made of a refractory metal such as tungsten W or molybdenum Mo.

Reference numeral 5 denotes a coil-shaped filament which is connected to the support members 4 and 4 and is disposed at a predetermined position in the bulb 1. Reference numeral 6 denotes a shell portion 61 provided to the crush sealing portion 2 via a heat-resistant adhesive 69. An external lead wire (not shown) made of molybdenum Mo or the like connected to the other end of each of the molybdenum Mo foils 3 and 3 is connected to a BA15d-type base having the position adjusting ring 62 joined thereto.

In addition, a halogen (CH
₂ Br ₂ ... 1900ppm) inert gas containing (Kr9
0% by volume and the balance N) are sealed at about 3 atm.

The coiled filament 5 and the support member 4 will be described in detail. The filament 5 is formed by winding a tungsten wire having a wire diameter of about 0.22 mm (MG about 150) into an elliptical shape or a perfect circular shape. It comprises a coil-shaped portion 51 serving as a source, and straight leg portions 52, 52 bent from both ends of the coil-shaped portion 51 in a direction perpendicular thereto. The support member 4 is a support wire made of tungsten W in this case. The support end is connected to the molybdenum Mo foil 3 at the base end side, and the coil part 41 is formed at the folded part at the other end side.

The linear leg portion 5 of the filament 5
2 is inserted into the coil portion 41, and the support wire 4 is provided at the lowermost coil portion 41 in FIG.
Are mechanically and electrically connected by crimping at the bent portion. FIG. 2 is a cross-sectional view of a state in which the leg portion 52 and the coil portion 41 of the filament 5 are straight, and FIG. 2A shows the intermediate coil portion 41 and FIG.
Indicates a lowermost coil portion 41, and 7 indicates a coil portion 41.
The caulking portion 54, which is formed by crushing about one turn, is a gap of about 0.4 mm formed between the leg portion 52 and the coil portion 41, and both are in a loosely inserted state.

The halogen lamp L has a rating of, for example, 6.6 A100 W, and the configuration (coil data) of the coiled filament 5 is such that a tungsten element wire having an MG of about 150 is formed of an inner major axis and an inner minor axis of about 2 mm. 0.5 mm x approx.
5mm flat shape (oval oval shape) with a pitch of about 0.18mm and a length of about 4.2m wound about 10 turns
It has a single coil-shaped portion 51 having m light emitting portions, and leg portions 52, 52 of about 13 mm connected to the single coil-shaped portion 51. The support wires 4 and 4 have a wire diameter of about 0.23 m.
m (MG about 165) tungsten W wire, the base end of which is connected to molybdenum Mo foil 3 and the other end of which is folded is a coil having an inner diameter of about 0.28 mm wound 3 to 5 turns. A part 41 is formed.

When the electric bulb L having the above configuration is mounted on a socket (not shown) and energized, a current flows through the base 6, external lead wires (not shown), molybdenum foils 3, 3, and the leg portions 52, 52, and the electric current flows through the filament 5. The coil part 51 emits light and lights up.

Regardless of whether the light bulb L is turned on or off, and even if it receives strong or weak vibrations or shocks, the distal ends of the legs 52, 52 of the filament 5 have support wires 4 which also serve as internal lead wires. , 4 are connected and fixed to the coil portion 41 at the tip end, respectively. Vibrations and shocks are absorbed by bending of the coil portion 41, and strong stress is not applied to the leg portions 52, 52, and the leg portions 52, 52 are disconnected. Can be prevented.

The base end of the leg portion 52 is fixed to the lowermost coil portion 41 by swaging, and the swing of the leg portion 52 against vibration and impact corresponds to the outer periphery of the leg portion 52 except for the swaging portion 7. A slight gap 54 is formed between the inner wall of the coil portion 41 and the movement of the coil portion 41.
Since it is suppressed by the inner wall, it is possible to reduce the occurrence of the leg portion 52 coming out of the coil portion 41 or the disturbance of the light distribution due to vibration or the like.

The filament 5 has the same outer diameter as the coil-shaped portion 51 and the leg portion 52 constituting the light emitting portion, and the long leg portion 52 is not preferable because it is a main cause of lowering the luminous efficiency. As in the above embodiment, the length of the leg portion 52 is made shorter than that of the conventional product, and the outer diameter of the support wire 4 is made larger than the outer diameter of the filament 5 wire. In addition, it has the effect of improving vibration resistance and impact resistance.

Therefore, the halogen bulb L according to the present invention shown in the above embodiment can improve the loss and the holding strength in the leg portion 52, and can achieve higher vibration resistance, impact resistance and efficiency than the conventional bulb. Show.

FIG. 3 is an enlarged front view showing another embodiment of the connection structure between the coiled filament 5 and the support member 4 according to the present invention. In FIG. 3, the same parts as those in FIGS. The same reference numerals are given and the description is omitted.

FIG. 4 differs from FIG. 1 in that the entire support member 4 comprises a coil portion 41 in which a molybdenum Mo wire is continuously wound. Then, at the approximate center of the coil portion 41, two to three turns of the coil portion 41 are pressed and crushed from the outside, and the coil portion 41 which presses the vicinity of the tip of the leg portion 52 of the coiled filament 5 inserted therein is pressed. Both are mechanically and electrically connected and fixed by a caulking portion 7 formed by a flattened crimping stopper.

In this case, the same operation and effect as described above can be obtained.

FIG. 4 is a longitudinal sectional view showing an embodiment of the marker lamp D of the present invention. In FIG. 4, reference numeral 81 denotes a housing;
Reference numeral 2 denotes a lid which is superimposed on the housing 81 and constitutes a lamp body 8. 83 is a housing 81 and a lid 8
In the light projecting window 83 formed between the two, a prism lens 84 is fitted in the light projecting window 83 as a light control body. Further, a base 85 for adjusting the optical axis and making an electrical connection is provided in the lamp body 8, and a reflecting mirror 86 containing the halogen bulb L is provided on the base 85. Are directed toward the light emitting window 83.

The marker light D is buried in the runway 9 or the road 9 of the airfield, projects the cover 82 onto the road, and emits light from the light emitting window 83 in a predetermined direction, in this case, slightly downward from the optical axis A. It is used as a guide light or a road center light that emits light. For example, the halogen lamp L inside can withstand an impact generated when the airplane landing on the runway 9 touches down without touching the coil-shaped portion 51 and the leg portion 52 of the filament 5 without breaking the coil. Can be fulfilled.

Therefore, there is an advantage that the bulb L becomes a point in a short period of time, and the maintenance of the marker lamp is facilitated without frequent replacement.

The present invention is not limited to the above embodiment. For example, the sealing portion formed at the bulb end of the bulb may be a sealing portion formed by shrinking the bulb as well as the crush sealing, and the sealing member is limited to a metal foil such as molybdenum or tungsten. Instead, a linear sealing member may be used. In addition, the sealing portion formed on the bulb is not limited to the one-end sealed portion type light bulb, and the leg portions at both ends of the coiled filament extending linearly in the double-ended sealed portion type light bulb in the above-described embodiment. The configuration shown in FIG.

The glass material of the bulb is not limited to quartz glass, but may be another hard glass material as long as it has the required translucency, light refractive index and heat resistance. Further, the light bulb is not limited to a halogen light bulb, and may be a light bulb containing only an inert gas containing no halide.

Further, the marker light is not limited to the one described in the above embodiment, but may have another structure. The light control body may be a lens, a color filter, a protective glass plate, or the like. Is also good.

[0051]

According to the first to fourth aspects of the present invention, the stress applied to the filament is absorbed by the leg portion or the coil portion formed on the support member, whereby the vibration resistance and impact resistance can be improved, and the electric loss can be reduced. As a result, an anti-vibration bulb with improved luminous efficiency can be provided.

Further, according to the invention of claim 5, since the light bulb according to any one of claims 1 to 4 is provided,
It is possible to provide a marker lamp that has no short-life bulb and has a low bulb replacement frequency and is easy to maintain.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a halogen lamp for an aerial sign lamp according to the present invention.

FIGS. 2A and 2B are enlarged cross-sectional views of a main part showing a relationship between a leg portion of a coiled filament and a support member.

FIG. 3 is an enlarged front view showing another embodiment of the connection structure between the coiled filament and the support member according to the present invention.

FIG. 4 is a longitudinal sectional view showing an embodiment of the marker lamp of the present invention.

[Explanation of symbols]

 L: halogen bulb (incandescent bulb) 1: glass bulb 2: sealing section 3: sealing member (molybdenum foil) 4: support member (support wire) 41: coil section 5: coil filament 51: coil section 52: Leg part 7: Caulking part 8: Lamp body 83: Light emitting window 84: Light control body 86: Reflecting mirror D: Marking light

Claims (5)

[Claims] 1. A glass bulb having a seal at an end;
A pair of sealing members hermetically sealed in the sealing portion; a support member disposed in the valve and connected to each sealing member, and a coiled filament having a leg connected to the support member; The support member is connected to the leg portion of the coiled filament by connecting the coil portion formed on the other member to the straight portion of one member, and connecting the two members to each other. An anti-vibration light bulb characterized in that it is connected by being fixed. 2. An anti-vibration light bulb according to claim 1, wherein the outer diameter of the support member is larger than the outer diameter of the leg of the coiled filament. 3. The anti-vibration light bulb according to claim 1, wherein a straight portion of the connecting portion between the support member and the leg portion of the coiled filament is in a loosely inserted state in the coil portion. 4. The anti-vibration light bulb according to claim 3, wherein the fixing portion connecting the support member and the leg portion of the coiled filament is a coil portion located deeper than the inlet coil portion. 5. A lamp body having a light projecting window; a reflector housed in the lamp body and provided with the anti-vibration light bulb according to any one of claims 1 to 4; A sign light, comprising: a light body;