JP2002367570A - Vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vessel for an electric bulb or a fluorescent lamp reducing the contacting of a filament leg part of a mount with a bulb when the mount is housed inside the bulb and increasing the connection strength of the filament and an inner lead wire. SOLUTION: This vessel 1 is equipped with a glass bulb 1; a mount 2A sealed at the end of the bulb 1; at least a pair of lead members 3, 3 installed so as to gas-tightly pass through the mount 2A; at least a pair of inner lead wires 4, 4 being connected to the lead members 3, 3 and extending to the inside of the bulb 1; and a coil like filament 5 stretching between the inner lead wires 4, 4 in the direction crossing to a bulb shaft, connected to the lead wire 4 in a leg part 7, and having the leg part 7 fused at the outside edges of the facing lead wires.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incandescent lamp and a fluorescent lamp having an improved connection structure between a filament formed by winding a thin tungsten wire forming a light emitting source or an electrode into a coil and an internal lead wire for connecting and supporting the filament. It relates to a lamp such as a lamp.

[0002]

2. Description of the Related Art For example, a light bulb comprises a glass bulb and a mount in which a vacuum or a rare gas is sealed. The mount includes a bead glass, a pair of lead wires supported and fixed to the bead glass, a filament wound in a coil shape having both ends connected (connected) to the pair of lead wires, and It is composed of an anchor or the like that supports the intermediate portion, and supplies electric power to the filament from the outside via a lead wire to glow the filament to emit light or generate heat.

[0003] Generally, as this connecting means, a leg portion of a filament end portion is positioned in a hook portion formed by folding a tip portion of a pair of internal lead wires implanted in a bead stem or a flare stem. By pressing the legs to pinch the legs to make them mechanically connected, or to place the legs at the ends of the filaments crossing the vicinity of the tip of the internal lead wire, and to melt and solidify at least one side by electric welding and embed The connection is made in such a form, or the connection is made by embedding the leg portion at the end of the filament into the internal lead wire made of a material having a lower hardness than the tungsten wire.

In order to select the connecting means from the above-mentioned hook method or welding method, the form of the filament, the relationship between the filament diameter and the lead wire diameter, the material of the lead wire,
It is determined by the use conditions of the enclosure and the bulb.

[0005] In these connecting means, the leg of the end of the filament does not have a tip not only at the radially intermediate portion of the internal lead wire, but can easily and surely be connected to the internal lead wire. In order to achieve this, the wire is crossed with a lead wire, and the tip of the wire extends to an outer portion beyond the lead wire.

That is, in the connecting operation, the leg portion and the inner lead wire are connected in a cross shape by pressing or welding, and after the connection, the ends of the leg portions on both sides of the filament are connected to the outer side of the inner lead wire. It protrudes several mm more. Then, C (CC) -2V, C (C) in which the filament extends on almost one plane
In the case of a joint shape such as C) -2R, C (CC) -6 or C (CC) -7, there is a leg portion outside both internal leads when viewed from the valve axial direction, and the maximum width of the mount ( The intervening length of the filament is greater than the distance between the outsides of the two inner leads.

[0007] The mount in which the filaments are connected by the above means is inserted into the bulb through the opening at the end of the glass bulb in the sealing step, and the two are sealed.
At this time, if the distance between the inner wall surface at the opening or the intermediate portion of the valve and the outer end of the leg portion of the filament is small, even if the centers of both are slightly shifted, the valve and the projecting portion of the leg portion come into contact with each other. Deformation of filaments and internal leads.

That is, when the filament is deformed, the light emitting characteristics and the life characteristics are adversely affected, and the occurrence of these causes an increase in manufacturing defects, resulting in a problem of lowering the yield.

[0009] Also. If the filament approaches the inner wall surface of the bulb due to deformation, or if the leg is brought into contact with the inner wall surface of the valve, the valve will become locally hot when energizing the filament, causing thermal distortion. In some cases, cracks may occur in the glass bulb.

Further, when a coating such as a light-diffusing film, a reflection film, or a colored film is formed on the inner surface of the bulb, there is a problem that the end of the leg portion is shaved and scratched, resulting in a deterioration in appearance quality. .

As means for preventing these problems, a leg portion projecting outside the internal lead wire is bent along the lead wire. However, the tip of the bent leg portion comes into contact with the anchor implanted in the bead glass between the internal lead wires, and short-circuits between the internal lead wire and the anchor, so that predetermined light emission characteristics cannot be obtained or extremely. In rare cases, the tip of the bent leg portion may fall off, causing the above-mentioned short circuit or remaining as a foreign substance in the bulb, thereby deteriorating the appearance quality of the bulb.

[0012]

SUMMARY OF THE INVENTION The present inventor has succeeded in reducing the size and efficiency and reducing the diameter of a glass bulb by promoting resource saving and energy saving in the field of bulbs such as electric bulbs and fluorescent lamps. In order to avoid the undesired contact between the valve and the mounting member as described above, and to improve the connection strength between the filament and the internal lead wire, various investigations have been made, and the present invention has been conceived. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and reduces the contact between a filament leg portion of a mount and a bulb when the mount is housed in the bulb, and connects a filament to an internal lead wire. An object of the present invention is to provide a bulb such as a light bulb or a fluorescent lamp which can increase the intensity.

[0014]

According to a first aspect of the present invention, there is provided a bulb including a glass bulb, a mount sealed at an end of the glass bulb, and an airtightly penetrating inside the mount. At least one pair of lead members, at least one pair of internal lead wires connected to the lead members and extending into the glass bulb, and the pair of internal lead wires is stretched in a direction intersecting the bulb axis. The leg portion is connected to the lead wire, and a coiled filament whose leg portion is blown at the outer edge portion of the opposing lead wire is provided.

In the present invention and the following inventions, the definitions and technical meanings of the terms are as follows unless otherwise specified.

The shape of the glass bulb is A type, B type, G type.
Shapes, R shapes, S shapes, T shapes, and composite shapes thereof can be used. In the case of a T-shaped valve, the valve may have a bent shape such as an annular shape or a U shape. The minimum portion of the inner diameter of the valve can correspond to the opening portion or the intermediate portion, and a valve having an opening portion called end forming may be formed.

The sealing portion formed at the end of the valve includes a crushed sealing portion, a sealing portion formed by contracting the valve, a sealing portion with a mount using a flare stem or a button stem, and a bead mount. Examples of the used sealing portion include those in which the lead member is not directly sealed to the valve but is indirectly sealed via the flare stem or a stem implanted in a bead or the like.

The coiled filament functions as a light emitting source in the case of a bulb and as a discharge electrode in the case of a discharge lamp.

The form of the leg portion of the filament is not limited to a single wire or a coil. In the case of the coil, the volume to be melted can be increased as compared with the single wire. Also, the present invention can be applied to a case where a high melting point metal wire such as a tungsten wire or a molybdenum wire is inserted as a core into a coiled leg portion.

The lead member hermetically sealed in the sealing portion may be a dumet wire, a Kovar wire, a tungsten wire, a molybdenum wire, or a metal foil of any of these materials. It can be selected according to the expansion rate.

As the internal lead wire, iron, nickel, copper, tungsten, molybdenum or the like, an alloy thereof, a metal wire coated with these metals or a dumet wire is used. You can choose.

The shape of the connecting wire of the mount can be applied to any type, but C (CC) -2V, C in which the ends of the legs on both sides of the filament intersect with the valve axis.
The filaments such as (CC) -2R, C (CC) -6 and C (CC) -7 extend on almost one plane, and have leg portions outside both inner leads as viewed from the valve axis direction. It is suitable for a linear shape.

Further, the means for fusing the filament leg portion and welding to the lead wire can be performed by laser or arc.

In the tube according to the first aspect of the present invention, since the leg portion of the portion protruding outward from the internal lead wire of the mount is blown, the maximum width of the mount (axial direction of the filament) is reduced as compared with the prior art. ), The gap between the inner wall surface of the bulb and the tip of the leg of the filament is widened, the accommodation operation can be performed smoothly, and the contact between the bulb and the filament can be reduced.

According to a second aspect of the present invention, there is provided a tube in which the coil-shaped filament has a leg portion protruding at an outer portion of an opposite lead wire and an end portion thereof is welded to the lead wire. Features.

At the time of fusing the leg portion according to claim 1,
The protrusion length of the leg portion can be shortened by simultaneously welding the melted leg portion to the outer portion of the lead wire.
And the connection can be ensured. In addition, the fact that the internal lead wire portion is melted simultaneously with the leg portion at the time of the welding may be sufficient because the welding strength is improved.

[0027] A tube according to a third aspect of the present invention is characterized in that the leg portion of the filament is clamped in a hook portion formed by folding the tip of the internal lead wire.

When the connecting means is formed by a hook portion, the operation according to the first and second aspects is achieved.

A bulb according to a fourth aspect of the present invention is characterized in that a leg portion of the filament is welded to a tip portion of the inner lead wire.

When the connecting means is applied by means of welding, the effects described in the first and second aspects are achieved.

A bulb according to a fifth aspect of the present invention is characterized in that a leg portion of the filament is buried in the distal end portion of the internal lead wire made of a material having a lower hardness than the filament.

When the connecting means is applied by tapping, the operation according to the first and second aspects is achieved.

[0033] The tube according to claim 6 of the present invention is characterized in that the filament serves as a light emitting source or a discharge electrode.

When the filament is used as a light source, the lamp is a light bulb. When the filament is used as a discharge electrode, a discharge lamp is used. To play.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a small incandescent lamp L1 used for lighting, display, display, or the like in a vehicle such as an automobile, audiovisual equipment, or the like, and FIG. 2 shows a main part (connection line) of a mount 2A of the lamp L1. FIG. 3 is an enlarged perspective view, and FIG. 3 is an explanatory view of the relationship between the glass bulb 1 and the mount 2A.

Referring to FIG. 1, reference numeral 1 denotes a tubular valve made of soda lime glass or lead glass. One end is closed in a hemispherical shape, and the other end is provided with a sealing portion 11 sealing a bead mount 2A. ing.

The bead mount 2A hermetically penetrates lead members 3 and 3 made of a pair of dumet wires into a bead 21 made of glass of substantially the same quality as the bulb 1, and the lead members 3 and 3 At the ends of the internal lead wires 4 and 4 which constitute the same, leg portions 7 at the ends of the coil-shaped filament 5 are connected by means described later.

The filament 5 used in the bead mount 2A has a single coil shape formed by winding a thin tungsten wire, the middle portion is a light emitting portion 6, and both sides of the light emitting portion 6 are leg portions 7,7. C-2V type connecting wire structure. In the drawing, reference numeral 22 denotes an anchor made of a molybdenum wire having one end planted in the glass bead 21 and the other end supporting the intermediate portion of the filament 5.

The lead member 3 made of a dumet wire
The inner lead wire 4 extending from the sealing portion 11 into the bulb 1 and the outer lead 31 extending from the sealing portion 11 to the outside of the bulb 1 are used as the hermetic sealing wire with the glass of the bead 21. The sealing wire and the inner and outer lead wires 3, 4, 31 are made of the same wire.

The connecting wire structure is such that the leg portion 7 of the filament 5 in the form of a single coil is pinched and connected to the inside of the hook portion 41 formed by folding the tip of the internal lead wire 4. The outwardly protruding leg portion 7 is blown off by laser irradiation or the like in the vicinity of the lead wire 4 and shortened.
It has become.

The connection operation of the mount 2A of the light bulb L1 is performed by forming the filament 5 in the form of a single coil in the hook portion 41 formed by bending the ends of the pair of internal lead wires 4.
The same means as in the related art in which the leg portions 7 are interposed in an intersecting state, and the leg portions 7 are pressed from above and below with a pincher or the like and pressed against each other to pinch the leg portions 7 within the hook portions 41. Done in

The position (interval) at which the pair of internal lead wires 4, 4 presses the leg portions 7, 7 of the filament 5 is determined in advance. Life will not be obtained. For this reason,
Equipment is adjusted so that there is little variation in spacing and high-precision connection is made.

Thereafter, a laser or the like is radiated to the vicinity of the root of the leg portion 7 protruding from the outside of the internal lead wires 4 and 4, and the irradiated portion is heated to a high temperature to be melted. A molten mass 71 is formed at the tip of the projecting portion, and is in a state as shown in an enlarged manner in FIG.

The axial length (maximum width) of the filament 5 connected to the mount 2A is designed to be smaller than the inner diameter of the opening at the end of the bulb 1 or the diameter of the intermediate portion.

The bead mount 2A manufactured in this manner is placed on a mount pin, for example, in a sealing device, and the valve 1 descends from above and the bead 21 is positioned in the opening of the valve 1. I do. Then, heating is performed by a burner from the outer periphery of the bulb 1 where the bead 21 is located, and the outer periphery of the bulb 1 is contracted and welded to the bead 21 to perform sealing.

Although not shown, the inside of the valve 1 is evacuated during the sealing operation of the two or in an evacuation step before the sealing, and the inside of the valve 1 is kept in a vacuum state or an inert gas such as argon is supplied for a predetermined time. In the case where the exhaust pipe is provided under pressure and the exhaust pipe is provided, the exhaust pipe is sealed from an intermediate portion, and thereafter, the base is covered with the sealing part as necessary, thereby completing the incandescent lamp L1.

The above sealing operation is performed by the relative movement of the mount 2A and the valve 1, and the sealing is performed in a state where the relationship between the mount 2A and the valve 1 is upside down. May be performed.

In the structure of the present invention, since the legs 7, 7, which protrude outward from the internal lead wires 4, 4, of the mount 2A are blown, the maximum width of the mount 2A (filament 5 Of the filament 1) and the gap between the inner wall surface of the bulb 1 and the tip of the leg portion 7 of the filament 5 is widened, so that the accommodating work can be easily performed.
And the filament 5 can be reduced in contact.

As a result, the deformation caused by the leg portions 7 of the internal leads 4 and 4 and the filament 5 coming into contact with the bulb 1, the deformed leg portion 7 coming into contact with the anchor 22 to be short-circuited, The light bulb L1 can prevent the leg portion 7 from contacting the bulb 1 to cause thermal distortion or thermal shock, and can reduce the loss of light emission characteristics and life characteristics, and can suppress the decrease in yield due to the occurrence of defects.
Can be provided.

FIGS. 4 (a) and 4 (b) are enlarged perspective views showing main parts (connection lines) of a mount according to another embodiment of the present invention, and are the same as FIGS. 1 to 3 in the drawings. The same reference numerals are given to the portions, and the description thereof will be omitted.

FIG. 4A shows the internal lead wire 4.
When the leg 7 protruding from the outside of the leg 7 is blown out, the vicinity of the root of the leg 7 is irradiated with a laser or the like so that the molten mass 71 of the protruding leg 7 is welded to the side surface of the hook 41 of the internal lead wire 72.
(At this time, the lead wire 4 also melts.)
The filament 5 is welded while the leg 7 is pressed.
2, the connection is made strong mechanically and electrically, and the same operation and effect as described above are achieved.

In the case where the connecting means is formed by the hook 41 as shown in the above embodiment, if the clamping pressure of the hook 41 is too strong, the leg 7 is subjected to the shearing action by the side edge of the hook 41 or the coiled portion. 6, stress may be applied to the tungsten wire of the leg portion 7 and the wire may be broken at an early stage due to the damage, or the pitch of the coil-shaped portion 6 may be disturbed, and predetermined initial characteristics may not be obtained.

If the pressure contact is insufficient to avoid this,
When vibration or impact is applied, the leg portion 7 that should have been pressed against the hook portion 41 may come off and lose electrical connection as in the case of disconnection. However, when the present invention is applied, Even if there is a gap 42 in the hook portion 41 where the clamping pressure is weak and the overlapped hook portion 41 as shown in FIG. 4 (b), the protruding end of the leg portion 7 is welded 72 to the side surface of the hook portion 41, so that the connection is made. It can be performed firmly and firmly, and has the same operational effects as described above.

FIGS. 5 and 6 show another embodiment of the present invention. FIG. 5 is a front view of the ring-shaped fluorescent lamp L2, and FIG. 6 is a longitudinal sectional front view of an essential part showing one end of the lamp L2 of FIG. 5 in an enlarged manner. Are denoted by the same reference numerals, and description thereof is omitted.

5 and 6, the fluorescent lamp L2
After the flare stem 23 of the mount 2B is sealed at both ends of the straight tube-shaped glass tube bulb 1 having the phosphor film 8 formed on the inner surface, the bulb 1 is bent into an annular shape when the bulb 1 is heated and softened. Since the mounts 2B and 2B have the same configuration at both left and right ends, one side thereof is shown in an enlarged scale in FIG. In the figure, reference numeral 9 denotes a base provided to bridge between the sealing portions 11 and 11.

The mount 2B hermetically seals a pair of lead members 3 and 3, such as dumet wires, and an exhaust pipe 25 in a sealing portion 24 formed by crushing one end of a stem 23. One end of each of the lead members 3, 3 is provided with a valve 1
Internal lead wires 4 and 4 made of nickel-plated iron wire or the like extending inside and external lead wires 31 and 31 made of nickel wire or the like extending outside the stem 23 are connected to the other end. It is.

The hook portions 41, 41 at the tips of the internal lead wires 4, 4 are provided with the double-coil leg portions 7, 7 at the ends of the triple-coil filament 5 in the above embodiment. It is connected with the same configuration as The triple coil-shaped portion 6 is coated with an electron-emitting substance (not shown) mainly composed of barium oxide, calcium oxide, and strontium oxide.

That is, this coiled filament 5
Are connected with the CC-6 type connection structure,
The triple coil-shaped portion 6 between the four forms a discharge electrode, and the legs 7, 7 projecting outward from the inner lead wires 4, 4 at the ends are blown off by a laser or the like, and the projection is small. Alternatively, it is welded to the outside of the hook portion 41 of the internal lead wire 4.

Then, the fluorescent lamp L having such a configuration is used.
Also in the case of No. 2, when the mount 2B is accommodated in the bulb 1, the ends of the legs 7, 7 are less protruded outside the internal lead wires 4, 4, so that the gap with the inner wall surface of the bulb 1 can be increased. Therefore, inconveniences caused by the contact between the two can be reduced in the same manner as in the above-described embodiment, and the appearance quality such as scratching and peeling of the phosphor film 8 applied to the inner surface of the bulb 1 can be prevented. .

In a lamp in which this type of bulb 1 is bent or bent, the leg portion 7 and the inner wall surface of the bulb 1 approach each other when the bulb is formed, but the protrusion of the leg portion 7 is reduced to increase the separation distance. As a result, the contact between the two can be reduced, and a favorable result has been obtained by applying the present invention to a ring-shaped fluorescent lamp or the like in which the bulb is made thin and high efficiency is achieved.

FIGS. 7A and 7B show another embodiment of the mounts 2C and 2D according to the present invention.
In the drawings, the same parts as those in FIGS. 1 to 6 are denoted by the same reference numerals, and description thereof will be omitted.

The illustrated mounts 2C and 2D are obtained by connecting the leg portions 7 of the filaments 5 to the internal lead wires 4 and 4 by welding. FIG.
1 (b) is a view in which the molten mass 71 of the leg portion 7 which has been blown is welded 72 to the outer portion of the lead wire 4. FIG. In addition, x in a figure is a welding part.

In this manner, the same method as that of the above-described embodiment can be applied to the case where the leg portion 7 projecting outward from the internal lead wire 4 is processed by welding, or by striking (not shown). Action and effect can be obtained.

The present invention is not limited to the above embodiment. It can be applied not only to small bulbs and fluorescent lamps as lamps, but also to other types of bulbs using coiled filaments and discharge lamps such as ultraviolet radiation lamps. Can be applied to

Further, in the case where a coating such as a light-diffusing film, a reflection film, a colored film or a phosphor film is formed on the inner surface of a glass bulb as a bulb, damage to the coating due to contact with the leg portion can be prevented.

Further, the fusing of the leg portion of the filament projecting from the internal lead wire is not limited to using a laser, but may be performed by an arc or the like.

[0067]

According to the first aspect of the present invention, the leg portion projecting outward from the internal lead wire of the mount is short,
The maximum width of the mount (the length of the filament passing in the axial direction) is smaller than before, and the gap between the inner wall surface of the bulb and the tip of the leg portion is widened, so that the housing operation can be easily performed.

Therefore, the deformation caused by the contact between the leg portion of the internal lead wire and the filament and the bulb is reduced. As a result, a short circuit between the leg and the anchor, and the filament comes into contact with the bulb to cause thermal distortion and thermal shock. Thus, it is possible to provide a tube in which the light emission characteristics and the life characteristics are prevented from being impaired, such as the occurrence of cracks in the bulb, and the yield is improved.

According to the second aspect of the present invention, in addition to the same effect as described in the first aspect, the leg portion protruding outward from the internal lead wire is welded to the lead wire to thereby form the leg. It is possible to provide a tube having a strong mechanical and electrical connection in which the portion does not fall off from the lead wire.

According to the third aspect of the present invention, it is possible to provide a tube having the same effects as those described in the first and second aspects when the connecting means is of a hook type.

According to the invention of claim 4 of the present invention, it is possible to provide a tube having the same effects as those described in the above-mentioned claims 1 and 2 when the connecting means is a welding method.

According to the fifth aspect of the present invention, it is possible to provide a tube having the same effects as those described in the first and second aspects when the connecting means is of a driving type.

According to the invention of claim 6 of the present invention, the invention is applied to a light bulb using a coiled filament as a light emitting source or a discharge lamp using a coiled filament as a discharge electrode. Can be provided.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a small incandescent lamp according to the present invention.

FIG. 2 is an enlarged perspective view showing a main part (connection part) of the mount of the electric bulb of FIG.

FIG. 3 is an explanatory diagram showing a relationship between a glass bulb and a mount.

FIGS. 4A and 4B are enlarged perspective views showing a main part (connection line) of a mount according to another embodiment of the present invention.

FIG. 5 is a front view of the ring-shaped fluorescent lamp according to the present invention.

FIG. 6 is a longitudinal sectional front view of an essential part showing one end side of the lamp of FIG. 5 in an enlarged manner.

FIGS. 7 (a) and 7 (b) are perspective views showing a main part (connection part) of a mount according to another embodiment of the present invention.

[Explanation of symbols]

 L1: small incandescent lamp (incandescent lamp) L2: ring-shaped fluorescent lamp (discharge lamp) 1: glass bulb 11: sealing portion 2A, 2B: mount 3: lead member 4: internal lead wire 5: coiled filament 6: light emitting portion 7: Leg part

Claims (6)

[Claims] 1. A glass bulb; a mount sealed to an end of the glass bulb; at least one pair of lead members provided through the mount in an airtight manner; and glass connected to the lead member. At least a pair of internal leads extending into the valve; a leg portion connected to the pair of internal leads extending in a direction intersecting the valve axis, and a leg connected to the pair of internal leads; And a coil-shaped filament having a leg portion blown at an outer edge portion of the bulb. 2. The tube according to claim 1, wherein the protruding leg portion of the coiled filament is fused at the outer portion of the opposing lead wire and the end is welded to the lead wire. ball. 3. The bulb according to claim 1, wherein a leg portion of the filament is clamped in a hook portion formed by folding a tip portion of the internal lead wire. 4. The tube according to claim 1, wherein a leg portion of the filament is welded to a tip portion of the inner lead wire. 5. The tube according to claim 1, wherein a leg portion of the filament is buried in a tip portion of the inner lead wire made of a material having a lower hardness than the filament by tapping. 6. The tube according to claim 1, wherein the filament serves as a light emitting source or a discharge electrode.