JP2007200759A - Filament lamp - Google Patents

Abstract

[Problem] To provide a filament lamp having improved vibration resistance and impact resistance of a filament in a filament lamp used in a place subjected to large vibrations and impacts.
SOLUTION: A filament coil 10 as a light emitting part, a filament holding part 14 for holding the filament coil 10, and an arm part 13 extending from the filament holding part 14 and having an end part held by a seal part 3 or glass beads 8 are provided. In the filament lamp 1 including the supporter 12, the filament holding portion 14 surrounds the outer periphery of one pitch or more of the filament coil 10.
[Selection] Figure 1

Description

  The present invention relates to a filament lamp, and more particularly to a filament lamp characterized by a supporter that holds a filament coil of the filament lamp.

Conventional filament lamps are often used in fixed places such as indoor lighting and store lighting. However, in recent years, there are increasing cases of use in places where vibrations with a relatively short period occur, such as under an overpass or a bridge. Furthermore, it is also widely used in mobile objects such as automobiles and game facilities.
Under such circumstances, the filament coil provided in the filament lamp is required to have high vibration resistance and impact resistance. Furthermore, in order to reduce the frequency of replacing the filament lamp, there is a demand for extending the life of the filament lamp. One of the causes of the short life of the filament lamp has long been known to be that the filament coil hangs down.

Conventionally, various techniques have been developed in order to suppress deformation of the filament coil in an environment exposed to vibration and impact. As such a technique, for example, those disclosed in JP-A-6-325737 and JP-A-11-213958 are known.
Japanese Patent Application Laid-Open No. 6-325737 describes a technique in which a wire forming a filament coil is fixed with a key-shaped filament holding portion in the vicinity of the center portion of the filament coil.
Japanese Patent Laid-Open No. 11-213958 describes a technique for preventing movement of a filament coil by providing a single coil-shaped leg portion at both ends of the filament coil and providing an anchor for supporting the filament coil at an intermediate portion of the filament coil. Has been.

FIG. 7 is a diagram showing the configuration of a filament lamp 101 according to the prior art, FIG. 7 (a) is a diagram showing the overall configuration of the filament lamp 101, and FIG. 7 (b) is the filament coil 108 and filament coil of the filament lamp 101. FIG. 6 is an enlarged view showing a supporter 109 that holds 108.
As shown in these drawings, the filament lamp 101 is provided with a pinch-sealed seal portion 103 at both ends of a glass bulb portion 102, and the metal foil 104 and one end of the metal foil 104 are provided in the seal portion 103. An external lead rod 105 connected to the is embedded. A base portion 106 is provided at one end of the external lead rod 105 protruding to the outside. In addition, a power feeding unit 107 is connected to the other end of the metal foil 104, and a filament coil 108 is connected to the inside of the valve unit 102 of the power feeding unit 107. Here, the case where the filament coil 108 is a double coil (also referred to as a double coil) is shown as an example.
The supporter 109 holds the filament holding part 110 whose tip is formed in a key shape by being hooked on a part of the secondary coil of the filament coil 108. When the filament coil 108 is a single coil filament (also referred to as a single coil filament), the filament coil 108 is hooked and held on the wire itself forming the filament coil 108.

JP-A-6-325737 Japanese Patent Laid-Open No. 11-213958

  However, in the configuration of the filament lamp 101 according to the related art, since the filament holding unit 110 locally fixes the filament coil 108, when a large vibration or impact is applied to the filament coil 108, the filament coil 108. There was a problem that would be deformed. For example, when the filament coil is a double coil, the filament holding unit 110 is locally caught by the primary coil portion constituting the secondary coil of the filament coil 108. Further, even in the case of a single coil filament, the wire itself constituting the filament coil 108 is locally caught. Therefore, when a large impact is applied to the filament coil 108 in such a state, the filament coil 108 moves with the locally hooked portion as a fulcrum, and the pitch of the filament coil 108 increases. Had occurred.

  In view of the above problems, an object of the present invention is to provide a filament lamp that is improved in the vibration resistance and shock resistance of a filament in a filament lamp used in a place where a large vibration or impact is applied.

The present invention employs the following means in order to solve the above problems.
The first means includes a filament coil as a light emitting part, a filament holding part for holding the filament coil, and a supporter comprising an arm part extending from the filament holding part and having an end part held by a seal part or glass beads. The filament lamp is characterized in that the filament holding part surrounds one or more pitches of the filament coil.
A second means is a filament lamp characterized in that, in the first means, the arm portion is provided in parallel with the axial direction of the filament lamp.
A third means is the filament lamp according to the first means or the second means, wherein the filament holding portion is a coiled member.

According to invention of Claim 1, the filament coil as a light emission part, the filament holding part holding this filament coil, and the arm extended from this filament holding part, and an edge part is hold | maintained with a seal part or a glass bead In the filament lamp provided with a supporter composed of a portion, the filament holding portion surrounds the outer periphery of one pitch or more of the filament coil, so that the problem that the coil is dropped from the filament holding portion and the coil pitch is extended is avoided. Can do. Further, the filament coil can be reliably held even when a large impact is applied in the direction orthogonal to the coil axis.
According to the second aspect of the present invention, since the arm portion is provided in parallel with the axial direction of the filament lamp, the arm portion itself moves slowly when subjected to very large vibration or impact. Therefore, the filament holding part moves gently in the same direction as the moving direction of the filament coil, and the deformation of the filament coil due to vibration or impact can be reliably prevented.
According to the invention described in claim 3, since the filament holding portion is formed of a coil-shaped member, the filament coil can freely move with respect to minute vibrations, and large vibrations can be obtained. When the filament coil moves greatly due to or shock, the filament coil holding part holds the filament coil and suppresses the movement of the filament coil, so that the filament coil can be prevented from being deformed even if there is a large vibration or impact. it can.

An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a diagram showing a configuration of a filament lamp according to the present invention.
In the figure, 1 is a filament lamp composed of a halogen lamp or the like, 2 is a light-transmitting bulb part, 3 is a seal part provided at both ends of the filament coil 10, and 4 is an airtight seal provided in the seal part 3. 5 is an external lead rod, 6 is a base part, 7 is a power supply part, 8 is a glass bead, 9 is a support part, 10 is a filament coil made of tungsten, etc. 11 is an exhaust pipe in the valve part 2 The chip part, 12 is a supporter, 13 is an arm part, and 14 is a filament holding part.

As shown in the figure, the filament lamp 1 has seal portions 3 at both ends of a bulb portion 2, and the seal portion 3 has a metal foil 4 and external lead rods 5 connected to both ends of the metal foil 4, respectively. And a power feeding part 7 protruding from the valve 2 is provided. A base portion 6 that protects the external lead rod 5 is provided at the other end of the external lead rod 5. A rare gas such as argon and a trace amount of halogen gas such as bromine are enclosed in the bulb 2. Further, in the valve unit 2, a power feeding unit 7, a glass bead 8, a support unit 9, a filament coil 10, and a supporter 13 are arranged.
The glass beads 8 are arranged in a direction perpendicular to the filament coil axis, and a power supply unit 7 connected to one end of the metal foil 4 embedded in the seal unit 3, and a support unit 9 extending from the other power supply unit 7. The arm portion 13 of the supporter 12 is fixed on one seal portion 3 side.

  The supporter 12 includes an arm portion 13 and a filament holding portion 14. One end side of the filament holding part 14 is constituted by a coil-shaped member, and the inner diameter of the filament holding part 14 is larger than the outermost outer diameter of the filament coil 10. The filament holding portion 14 holds the filament coil 10 so as to surround the outer periphery over a length of one pitch or more at a substantially central portion of the filament coil 10, and the other end side of the filament holding portion 14 is connected to the arm portion 13. . The arm portion 13 connected to the other end side of the filament holding portion 14 extends substantially parallel to the coil axis direction of the filament coil 10, and the end portion of the arm portion 13 is sandwiched and fixed by the glass beads 8.

  As described above, since the filament coil 10 is held by the supporter 12 at a substantially central portion of the filament coil 10, the filament coil 10 is securely held even if the filament coil 10 is about to move due to a large vibration or impact. Can do. More specifically, since the inner diameter of the filament holding portion 14 is larger than the outermost outer diameter of the filament coil 10, the filament coil 10 moves freely in the filament holding portion 14 with respect to small vibrations and impacts. The filament holding unit 14 suppresses the movement of the filament coil 10 against a large vibration or impact. Furthermore, since the arm portion 13 is disposed substantially parallel to the coil axis of the filament coil 10, the arm portion 13 itself moves slowly when subjected to very large vibrations or shocks. 14 moves slowly in the same direction as the moving direction of the filament coil 10, and the deformation of the filament coil 10 due to vibration or impact can be reliably prevented.

FIG. 2 is an enlarged cross-sectional view for explaining the positional relationship between the filament coil 10 and the filament holding portion 14. Here, a case where a single coil is used as the filament coil 10 will be described.
The filament coil 10 is formed by winding a tungsten wire having a wire diameter d at a constant coil pitch. When the length of one coil pitch of the filament coil 10 is P1, and the length of the filament holding portion 14 in the coil axis direction is L2, L2> P1 is established between the filament coil 10 and the filament holding portion 14. There is a relationship. Thereby, the filament holding part 14 does not fall between the pitches of the filament coil 10, and the filament coil 10 does not move beyond the filament holding part 14. That is, when the filament coil 10 moves greatly, the filament holding part 14 is locally caught by a part of the tungsten wire constituting the filament coil 10, and the coil pitch is extended with the part as a fulcrum. Can be prevented.

  Even if L2 ≦ P1, the filament holding portion 14 is prevented from falling into the filament coil 10 if L2 is larger than the gap S1 of the filament coil 10 (the portion obtained by subtracting the wire diameter d from the pitch P1). Can do. That is, if L2> S1, the effect is slightly reduced, but the impact resistance is improved, and deformation of the filament coil can be prevented.

  Further, assuming that the outermost outer diameter of the filament coil 10 is D1 and the inner diameter of the filament holding portion 14 is D2, there is a relationship of D2> D1. Thereby, when the filament coil 10 receives minute vibrations, the filament coil 10 can freely move. Further, when the filament coil 10 is about to move greatly due to a large vibration or impact, the filament holding part 14 holds the filament coil 10 and suppresses the movement of the filament coil 10, so that even if there is a large vibration or impact, the filament The deformation of the coil 10 can be prevented.

  In FIG. 2, when the filament holding part 14 is configured by a coil-shaped member, in addition to the above-described conditions, L2> P1 and D2> D1, the length of one coil pitch of the filament holding part 14 is P2. In this case, P1> P2 with respect to the length P1 of one coil pitch of the filament coil 10. Thereby, the coil of the multi-turn of the filament holding | maintenance part 14 will be arrange | positioned with respect to the length for 1 turn of the filament coil 10, and the filament coil 10 can be hold | maintained more reliably.

  Further, in the case of the single coil shown in FIG. 2, the coil gap S2 of the filament holding portion 14 (the coil pitch length of the coil of the filament holding portion 14) with respect to the wire diameter d of the wire forming the filament coil 10 And the length excluding the thickness of the wire constituting the coil) is d> S2. In addition to the above-mentioned conditions L2> P1, D2> D1, and P1> P2, by satisfying the condition of d> S2, the wire of the filament coil 10 (1 in the case of a double coil) in the gap S2 of the filament holding portion 14 The secondary coil) does not drop, and the filament coil 10 can be reliably held.

  In the invention of the present embodiment, the case where a single coil is used as the filament coil 10 has been described. However, when the filament coil 10 is a double coil, the wire diameter d of the wire is the coil diameter of the primary coil, In the case of a triple coil, the wire diameter d of the wire is the coil diameter of the secondary coil. That is, the primary coil outer diameter of the coil constituting the outermost outer diameter is d.

FIG. 3 is an explanatory diagram relating to a test for confirming the effect of the filament lamp of the present invention.
FIG. 3 (a) is a diagram showing a configuration of a lighting fixture provided with a filament lamp inside and used in a test for confirming the effect, and the left side of FIG. 3 (a) is a front view of the lighting fixture, The right side of FIG. 3A is a side view of the lighting fixture.
In these figures, reference numeral 15 denotes a filament lamp of the present invention or a prior art filament lamp arranged on the optical axis which is a light emitting direction in a reflecting mirror 17, 16 is a front lens, and 17 is a shield beam type reflecting mirror. is there.
The prior art filament lamp is the prior art filament lamp shown in FIG. 7, which is a filament lamp provided with a caulking type supporter.

  In both filament lamps, the outermost diameter φ of the filament coil is 1.4 mm, the length l of the filament coil is 19 mm, and the wire used for the supporter is made of tungsten and the wire diameter φ is 0.3 mm.

FIG. 3B is a diagram showing a rotation test apparatus used in a test for confirming the effect, and this rotation test apparatus is an apparatus for rotating a filament lamp being lit in a horizontal or vertical direction.
In the test, the filament lamp of the present invention and the filament lamp of the prior art are turned on at an input of 100 V and 300 W at a filament temperature of 3200 K, the arm supporting the lighting device is used as a fulcrum, the turning radius is 30 cm, and the vertical direction It was performed by swinging 180 degrees, 360 degrees in the horizontal direction, suddenly stopping, and further reversely swinging and suddenly stopping. The swinging speed was 60 degrees / second.

  FIG. 3 (c) is a table showing the test results obtained by the above rotating test apparatus. As the lighting time, the filament lamp according to the prior art was disconnected in 25 hours in the horizontal direction and 23 hours in the vertical direction. On the other hand, the filament lamp of the present invention did not break even after 100 hours in both the horizontal and vertical directions. Thus, according to the present invention, it can be seen that a filament lamp having excellent impact resistance can be obtained.

FIG. 4 is a diagram showing various forms of supporters in the filament lamp of the present invention.
The configuration of the reference numerals shown in these drawings corresponds to the configuration of the same reference numerals shown in FIG.
FIG. 4A is a diagram showing the filament lamp 1 including two supporters 12 for the filament coil 10, and the end portions of the arm portions 13 of the respective supporters 12 are provided on both sides of the bulb portion 2. The glass beads 8 are fixed.
FIG. 4B is a diagram showing the filament lamp 1 including two supporters 12 with respect to the filament coil 10, and the end portions of the arm portions 13 of the respective supporters 12 are seal portions at both ends of the filament lamp 1, respectively. 3 is fixed.
FIG. 4C is a diagram showing the filament lamp 1 including two supporters 12 with respect to the filament coil 10, and an end portion of the arm portion 13 of each supporter 12 is a seal portion 3 on one side of the filament lamp 1. It is fixed to.
FIG. 4D is a diagram showing the filament lamp 1 including three supporters 12 for the filament coil 10, and the end portions of the arm portions 13 of the respective supporters 12 are the seal portions 3 at both ends of the filament lamp 1. It is fixed to.
FIG. 4E is a view showing the filament lamp 1 including four supporters 12 for the filament coil 10, and the end portions of the arm portions 13 of the respective supporters 12 are the seal portions 3 at both ends of the filament lamp 1. It is fixed to.
As shown in FIGS. 4 (a) to 4 (e), the filament lamp of the present invention can be in various forms for supporting the number of supporters and the number of supporters in the filament lamp.

FIG. 5A is a diagram showing the configuration of a single-ended filament lamp according to the present invention, and FIG. 5B is a diagram showing the configuration of a single-ended filament lamp with an external tube according to the present invention. is there.
The configuration of the reference numerals shown in these drawings corresponds to the configuration of the same reference numerals shown in FIG.
As shown in these drawings, the supporter 12 of the present invention can be applied to a single-ended filament lamp or a single-ended filament lamp with an external tube.

In FIG. 1, FIG. 4, and FIG. 5, the case where a coil-shaped member in which a wire is wound in a coil shape is used as the filament holding portion 14 of the supporter 12, but the shape of the filament holding portion is You may comprise not only a coil-shaped member but a cylindrical member, a net-like member, etc.
FIG. 6A is a diagram showing a configuration of a filament lamp including a cylindrical metal tube having a plurality of openings 19 on a cylindrical surface as the filament holding portion 18 of the supporter 12, and FIG. It is a figure which shows the structure of a filament lamp provided with what wound the flat board | plate material into the coil shape as 12 filament holding | maintenance parts 20. FIG.
In addition, the structure of the code | symbol shown in these figures respond | corresponds to the structure of the same code | symbol shown in FIG.
In addition, although not shown, the filament holding part may be configured by a mesh-like cylinder or the like. However, considering that the filament holding unit effectively uses light emitted from the filament coil, a gap is preferably provided in the filament holding unit.

It is a figure which shows the structure of the filament lamp which concerns on this invention. It is an expanded sectional view for demonstrating the arrangement | positioning relationship between the filament coil shown in FIG. 1, and a filament holding | maintenance part. It is explanatory drawing in connection with the test for confirming the effect of the filament lamp of this invention. It is a figure which shows the various form of the supporter in the filament lamp of this invention. It is a figure which shows the structure of the single end type filament lamp which concerns on this invention, and the structure of the single end type filament lamp with an external tube. It is a figure which shows the structure of a filament lamp provided with what wound the flat board | plate material in the shape of a coil, and the structure of a filament lamp provided with the cylindrical metal tube which has a some opening part in a cylindrical surface as a filament holding | maintenance part. It is a figure which shows the structure of the filament lamp which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 18, 20 Filament lamp 2 Bulb part 3 Seal part 4 Metal foil 5 External lead rod 6 Base part 7 Power supply part 8 Glass bead 9 Support part 10 Filament coil 11 Chip part 12 Supporter 13 Arm part 14 Filament holding part 15 This invention Filament lamp or prior art filament lamp 16 Front lens 17 Reflector 19 Opening

Claims (3)

In a filament lamp comprising a filament coil as a light emitting unit, a filament holding unit for holding the filament coil, and a supporter consisting of an arm part extending from the filament holding unit and having an end held by a seal part or glass beads,
The filament lamp is characterized in that the filament holding part surrounds the outer periphery of one pitch or more of the filament coil.   The filament lamp according to claim 1, wherein the arm portion is provided in parallel with an axial direction of the filament lamp. The filament lamp according to claim 1 or 2, wherein the filament holding part is a coil-shaped member.

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