JP2013109978A - Wedge base bulb for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wedge base bulb for vehicle ensuring a sufficient amount of light when unlighting and emitting light for a long time, without causing such a problem that a light-accumulating light-emitting part drops or is damaged by vibration or impact while a vehicle is running.SOLUTION: Two lead wires 4 introduced into a glass tube 2 while penetrating a base 2a formed at an end of the glass tube 2 integrally therewith are held by passing the lead wires through a common bridge glass 5, and a filament 6 is stretched between the tips of both lead wires 4. In such a wedge base bulb 1 for vehicle, the bridge glass 5 is coated with a light-accumulating paint. Furthermore, a slit-like groove is formed in the surface of the bridge glass 5.

Description

  The present invention relates to a vehicle wedge-based light bulb that emits light to visually recognize the presence of a vehicle when the vehicle is not lit during night parking.

  When the vehicle is parked at night, the vehicle lamps such as headlamps provided on the vehicle are in a non-lighted state, which makes it difficult for other vehicles and pedestrians to visually recognize the presence of the vehicle. It was.

  Therefore, conventionally, as a means for informing the existence of a vehicle in the dark, a method of sticking a luminous tape having a phosphorescent property to a license plate or the like has been adopted, but in such a method, the amount of light from the luminous tape as a light source is adopted. However, there are problems that the license plate cannot be lit throughout the night, and that the nightlight tape is peeled off due to theft or that the nightlight tape is deteriorated by ultraviolet rays emitted from sunlight.

  Therefore, in Patent Document 1, as shown in the cross-sectional view of FIG. 3, the vehicular lamp 100 including the light source 101, the lens 102, the reflector 103, and the like is formed around the lens 102 of the transparent light guide member 104. A configuration has been proposed in which the phosphorescent paint light emitting portion 105 is attached to the end face of the convex portion 104a.

JP 2007-149435 A

  However, in the configuration shown in FIG. 3 proposed in Patent Document 1, there is a possibility that the phosphorescent paint light-emitting unit 105 may drop off or be damaged due to vibration or impact when the vehicle is running.

  The present invention has been made in view of the above-mentioned problems, and the intended process is to provide a sufficient amount of light when the light is turned off without causing problems such as dropping or breakage of the phosphorescent light emitting part due to vibration or impact during driving of the vehicle. It is an object of the present invention to provide a vehicle wedge-based light bulb capable of securing a long-lasting light emission.

  In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that the two lead wires introduced into the glass tube through the mouthpiece formed integrally with the end portion of the glass tube pass through these common bridge glasses. In the vehicle wedge base light bulb in which the lead wire is held and a filament is stretched between the leading ends of both lead wires, a phosphorescent paint is applied to the bridge glass.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, slit-like grooves are formed on the surface of the bridge glass.

  According to the first aspect of the present invention, since the phosphorescent paint is applied to the bridge glass closest to the filament that is the light emitting portion to provide the phosphorescent function, the sunlight and the wedge-based light bulb are turned on in the daytime from the filament. Is stored in the phosphorescent paint applied to the bridge glass, and when the wedge base light bulb is turned off, the phosphorescent paint emits a sufficient amount of light for a long time, so that the visibility of the vehicle in the darkness is enhanced.

  In addition, since the effect is obtained by applying a phosphorescent paint on the surface of the existing bridge glass housed in the glass tube, other parts are unnecessary, and the number of parts is reduced and the cost is reduced. Problems such as falling off or damage of the phosphorescent parts due to vibration or impact during vehicle running do not occur.

  According to invention of Claim 2, since the slit-shaped groove | channel was formed in the surface of bridge | bridging glass, since the application area of the phosphorescent paint to this bridge glass increases, and since the application amount of phosphorescent paint also increases, for a further long time Light emission is possible.

It is sectional drawing of the wedge base light bulb for vehicles which concerns on this invention. It is a perspective view of the bridge glass part of the wedge base light bulb for vehicles concerning the present invention. It is sectional drawing of the vehicle lamp principal part proposed in patent document 1. FIG.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view of a vehicle wedge base light bulb according to the present invention, FIG. 2 is a perspective view of a bridge glass portion of the vehicle wedge base light bulb, and the vehicle wedge base light bulb 1 according to the present invention includes a braking light, Used as a light source for taillights, beacon lights, etc.

  In the vehicle wedge base light bulb 1 according to the present invention, as shown in FIG. 1, a base portion 2a is integrally formed at an end portion of the glass tube 2, and the base portion 2a has two metal parts. Terminal 3 is embedded. From each terminal 3, a metal lead wire 4 extends toward the inside of the glass tube 2, and each of the two lead wires 4 is held by a common bridge glass 5 inserted therethrough. The two lead wires 4 extend in parallel from the bridge glass 5 in the glass tube 2, and a filament 6 is stretched between the tips.

  Here, the filament 6 is made of tungsten or the like, and a coil portion 6a wound in a coil shape is formed at the center thereof, and linear leg portions 6b are formed from both ends of the coil portion 6a. It extends from side to side. The filament 6 is fixed between the distal ends of the two lead wires 4 as described above by fixing the ends of the left and right leg portions 6b to the distal ends of the two lead wires 4 by caulking. It is stretched.

  Thus, in the vehicle wedge base light bulb 1 according to the present invention, a phosphorescent paint containing an afterglow aluminate phosphor or the like is applied to the surface of the bridge glass 5. In this case, in this embodiment, as shown in FIG. 2, slit-like grooves 5a are respectively formed on both side surfaces of the bridge glass 5, and a phosphorescent paint is applied to the inside of these grooves 5a. .

  Thus, when the vehicle wedge base light bulb 1 according to the present invention is used as a light source of a vehicle lamp such as a brake light, a taillight, or a marker light, the vehicle wedge base light bulb 1 has a filament 6 as a light emitting portion. Since the phosphorescent paint was applied to the surface of the bridge glass 5 nearest to the bridge glass 5 so that the bridge glass 5 was provided with a phosphorescent function, the sunlight from the filament 6 during the daytime and the light from the filament base bulb 1 were lit when the bridge glass 5 was lit. Since the phosphorescent paint emits light with a sufficient amount of light for a long time when the wedge-based light bulb 1 is extinguished, the visibility of the vehicle in the darkness is enhanced. In particular, since the bridge glass 5 serving as the light emitting portion is located on the reference axis x of the wedge base bulb 1 like the filament 6, the reflection of the vehicle lamp on the reflector (not shown) is improved, and the vehicle in the dark Visibility is improved.

  Moreover, since the above-mentioned effect can be obtained by applying a phosphorescent paint to the surface of the existing bridge glass 5 accommodated in the glass tube 2, no other parts are required, and the number of parts can be reduced and the cost can be reduced. In addition, problems such as dropout or damage of the phosphorescent component due to vibration or impact during traveling of the vehicle do not occur. And since the bridge base 5 which is a light emission part in darkness is arrange | positioned in the sealed space of the glass tube 2 of the wedge base light bulb 1, problems, such as theft and deterioration by the ultraviolet-ray from sunlight, do not generate | occur | produce.

  Furthermore, in the present embodiment, since the slit-like groove 5a is formed on the surface of the bridge glass 5, the application area of the phosphorescent paint to the bridge glass 5 increases, and the amount of phosphorescent paint applied also increases, so that it takes a longer time. The effect that it becomes possible to emit light is also obtained.

  By the way, it is conceivable to apply a phosphorescent paint to the inner surface of the glass tube 2 of the wedge-based light bulb 1, but the transmittance of the glass tube 2 is lowered by the phosphorescent paint applied on the optical path, and the brightness (light flux value) is increased. May decrease. On the other hand, in the wedge-based light bulb 1 according to the present invention, since the phosphorescent paint is applied to the surface of the bridge glass 5 that does not exist on the optical path, the phosphorescent light is stored in the bridge glass 5 without causing a decrease in brightness (light flux value). Functions can be added.

  In addition, when the phosphorescent paint is applied to the inner surface of the glass tube 2 of the wedge-based light bulb 1, light emission unevenness occurs unless the phosphorescent paint is uniformly applied. Therefore, it is necessary to control the film thickness of the phosphorescent paint in the manufacturing process. Therefore, in the wedge-based light bulb 1 according to the present invention, if the amount of the phosphorescent paint applied to the rod-shaped bridge glass 5 is controlled, the phosphorescent paint can be uniformly applied. Can be kept low, and the yield can be increased. And since the application of the phosphorescent paint in the wedge-based light bulb 1 according to the present invention is performed in the same process as the adsorbent (getter) applied to the lead wire 4, the phosphorescent paint can be applied in the current manufacturing process. Thus, the manufacturing cost can be reduced.

DESCRIPTION OF SYMBOLS 1 Wedge base light bulb for vehicles 2 Glass tube 2a Glass tube cap part 3 Terminal 4 Lead wire 5 Bridge glass 5a Bridge glass groove 6 Filament 6a Filament coil part 6b Filament leg part x Reference axis

Claims (2)

While holding the lead wires through the bridge glass common to the two lead wires introduced into the glass tube through the base formed integrally with the end portion of the glass tube, and between the leading ends of both lead wires In the vehicle wedge-based light bulb with a filament stretched on the
A wedge base bulb for a vehicle, wherein a phosphorescent paint is applied to the bridge glass. 2. The vehicle wedge-based light bulb according to claim 1, wherein a slit-like groove is formed on a surface of the bridge glass.

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