JP4126599B2 - Automotive lamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp mounted on a vehicle such as a passenger car, for example, particularly a two-lamp headlamp.
[0002]
[Prior art]
FIG. 4 shows a conventional configuration example of a two-lamp headlamp as a lamp structure of an automobile. In this headlamp 100, a low beam unit 11 and a high beam unit 12 are arranged vertically in a housing 15 via brackets 13 and 14, respectively. Extension members 16a, 16b, and 16c are disposed near the front portions of the beam units 11 and 12, and an outer lens (cover) 17 is covered on the housing 15 from the front.
[0003]
In addition, since FIG. 4 is sectional drawing, each extension material 16a, 16b, 16c is each displayed separately, However, Extension material 16a, 16b, 16c is comprised as one member. Further, openings 16d and 16e are formed in the extension material so that light from the beam units 11 and 12 is emitted toward the outer lens 17.
[0004]
Here, in FIG. 4, when the flow of moisture in the headlamp 100 is viewed, for example, as shown in FIG. 4A, the low beam unit 11 is turned on to form the outer lens 17 by the radiant heat. Thus, moisture is released as shown in (b). Moisture generated by this moisture release phenomenon becomes flows A and B as indicated by arrows, and flows into the high beam unit 12 side which is the low temperature part side as shown in (c). That is, moisture generated on the low beam irradiation surface of the outer lens 17 flows as a flow A from the gap K1 between the outer lens 17 and the extension material 16b to the high beam unit 12 side which is the low temperature part side, and the extension material 16b and the low beam unit. 11 from the gap K2 to the low temperature part side. At this time, inhalation is performed through the breathing hole 18 and a part of the moisture is weakly exhausted through another breathing hole 19 (d).
[0005]
[Problems to be solved by the invention]
By the way, in the normal use state of the headlamp 100, the low beam unit 11 is frequently used, and the temperature of the outer lens 17 on the high beam unit 12 side where the use frequency is low is difficult to rise. For this reason, in normal usage, as described above, the moisture generated on the low beam irradiation surface of the outer lens 17 becomes flows A and B, and flows into the low temperature part side through different paths, so that it is trapped in the lamp bottom. Therefore, dew condensation (shaded portion indicated by W in FIG. 4) is generated on the inner surface of the outer lens 17 on the high beam unit 12 side, which causes a fogging phenomenon.
In order to prevent the fogging phenomenon, it is conceivable to apply an antifogging coat to the inner side of the outer lens 17, but the manufacturing cost increases.
[0006]
In addition, an automotive lamp is known in which a partition plate on which a reflective film is formed is disposed at a position retracted from an outer lens portion so that a certain fog reduction effect can be obtained (see Patent Document 1).
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-63315
In view of the above, an object of the present invention is to provide an automotive lamp that suppresses the occurrence of condensation and realizes high anti-fogging performance.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, an automotive lamp of the present invention includes a housing, a low beam unit and a high beam unit arranged in parallel in the housing, and disposed in front of these beam units and from each beam unit. An automotive lamp comprising an extension material in which an opening for emitting light to the outside is formed and an outer lens covered from the front on a housing, wherein moisture generated on a low beam irradiation surface of the outer lens is the extension material. A rectifying plate is provided so as to block the flow from the gap between the low beam unit and the low beam unit to the high beam unit side.
[0013]
The rectifying plate is preferably configured integrally with a bracket that supports the high beam unit on the housing. The high beam unit is juxtaposed below the low beam unit.
[0014]
According to the present invention, it is possible to effectively prevent the occurrence of dew condensation particularly on the lens surface by changing the convection direction and the flow velocity in the lamp by providing the current plate. The present invention is not only applied to automobile headlamps, but is also applicable to various rear lamps.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of an automotive lamp according to the present invention will be described with reference to the drawings using the same reference numerals for members that are substantially the same as or correspond to those of the conventional example.
FIG. 1 shows a two-lamp headlamp according to an embodiment of the present invention. In the headlamp 10, a low beam unit 11 and a high beam unit 12 are vertically arranged in a housing 15. As shown in the figure, the high beam unit 12 is disposed below the low beam unit 11 in this example.
[0016]
The low beam unit 11 is supported in the housing 15 via a bracket 13. Extension members 16a, 16b, and 16c are disposed near the front portions of the beam units 11 and 12, and an outer lens 17 is covered on the housing 15 from the front.
[0017]
Here, like the extension material of the conventional headlamp 100, the extension materials 16a, 16b, and 16c are configured as one member. Further, openings 16d and 16e are formed in the extension material so that light from the beam units 11 and 12 is emitted toward the outer lens 17.
[0018]
The above configuration is the conventional headlamp 100 described with reference to FIG. 4, that is, the housing 15, the low beam unit 11 and the high beam unit 12 arranged in parallel in the housing 15, and the front of these beam units 11 and 12. And an extension member 16 formed with openings 16d and 16e for emitting light from the beam units 11 and 12 to the outside, and an outer lens 17 covered with a housing 15 from the front. However, the headlamp 10 according to the embodiment of the present invention is configured differently in the following points.
That is, in the headlamp 10, the rectifying plate 2 is provided in the vicinity of the high beam unit 12. The rectifying plate 2 is configured to restrict convection generated in the lamp as will be described later.
The high beam unit 12 is supported in the housing 15 via the bracket 1, that is, the mounting bracket for the high beam unit 12.
[0019]
The rectifying plate 2 is made of resin and is formed in a substantially plate shape, and moisture generated on the low beam irradiation surface of the outer lens 17 flows into the high beam unit 12 side (low temperature portion side) from the gap K2 between the extension material 16b and the low beam unit 11. It is arrange | positioned in the position which interrupts.
[0020]
Further, as shown in FIG. 1, the current plate 2 extends in a substantially horizontal direction, and a substantially plate-like bracket 1 extends downward from the bottom surface thereof. As described above, the rectifying plate 2 and the bracket 1 are integrally configured in a substantially T shape in a side view.
The bracket 1 and the rectifying plate 2 may be manufactured as an integrated product by molding, or may be manufactured by connecting the separately manufactured bracket 1 and the rectifying plate 2 as an integrated product by bonding or the like. Further, the bracket 1 and the rectifying plate 2 shown in FIG. 1 are configured as one member, but the bracket 1 and the rectifying plate 2 may be individually manufactured and arranged separately in the lamp. .
[0021]
As described above, the rectifying plate 2 is disposed in such a manner as to be interposed between the rectifying plate 2 and the low beam unit 11 disposed on the upper side of the high beam unit 12. By arranging the current plate 2 in this way, the beam units 11 and 12 are partitioned by a predetermined area ratio.
[0022]
FIG. 2 shows a specific configuration example of the bracket 1 and the current plate 2 (shaded portion). In this embodiment, the size of the rectifying plate 2 is set so that the low beam unit 11 and the high beam unit 12 are partitioned by an area ratio of about 35%. As shown in FIG. 3A, the case where the low beam unit 11 and the high beam unit 12 are all partitioned is defined as 100%.
[0023]
In the above configuration, when the flow of moisture in the headlamp 10 is viewed, when the low beam unit 11 is first turned on, moisture is generated due to the moisture release phenomenon from the outer lens 17 as shown in FIG. Providing the rectifying plate 2 suppresses the diffusion of moisture to the high beam unit 12 side, and the moisture flows along the outer lens 17 surface as shown by the arrow in the figure, and the high beam unit 12 side (low temperature only) from the gap K1. Part). That is, in the headlamp 10 of this embodiment, the flow B generated in the conventional headlamp 100 is caused by the moisture generated on the low beam irradiation surface of the outer lens 17 from the gap K2 to the high beam unit 12 side (low temperature portion side). This does not occur because the rectifying plate 2 is provided at a position where the flow is blocked.
[0024]
By restricting the flow of gas in the lamp in this way, moisture is not confined to the high beam unit 12 side (low temperature part side), and the flow A becomes faster. As a result, condensation can be prevented and fogging can be eliminated. it can.
[0025]
At this time, the flow C is rectified on the rear side of the bracket 1, and inhalation is performed through the breathing hole 18 and strong exhaust from the breathing hole 19 is performed. This improves the exhaust performance, that is, the ventilation performance.
[0026]
In the above case, the low beam unit 11 and the high beam unit 12 are specifically partitioned by an area ratio of 35%, so that the anti-fogging performance about 5 times that in the case where the rectifying plate 2 is not provided can be obtained.
Here, when the low beam unit 11 and the high beam unit 12 are partitioned at a ratio of 35% or more (for example, in the case of 100% shown in FIG. 3A), moisture tends to be accumulated on the high beam unit 12 side. . Further, if it is 35% or less, the anti-fogging effect tends to be dilute, and therefore an area ratio of at least about 17% is required as shown in FIG.
[0027]
Thus, according to the headlamp 10 which concerns on embodiment of this invention, the fog prevention performance can be improved significantly by providing the baffle plate 2. FIG.
In particular, in the case of a projector-type headlamp, the rectification plate 2 integrated with the unit makes it possible to substantially reduce the cost for preventing fogging. By the way, the cost can be reduced to 1/3 or less compared with the case of an anti-fogging coat.
[0028]
Further, since the headlamp 10 does not have a structure for improving the ventilation performance by increasing the diameter of the breathing holes 18 and 19, dust or the like does not enter from the breathing holes 18 and 19, and there is a concern that the dust resistance may be impaired. Absent. Furthermore, since it is not a countermeasure against design parts, such as gap filling, a favorable external appearance can be maintained.
[0029]
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the embodiments, and can be appropriately changed within the scope of the present invention. For example, the specific numerical value of the partition area ratio between the low beam unit 11 and the high beam unit 12 by the rectifying plate 2 can be appropriately changed as necessary.
Furthermore, although an example of a two-lamp headlamp having two upper and lower stages has been described as an application example of the present invention, it can be similarly applied to a lamp having a horizontal two-lamp structure by setting a current plate as a separate part. is there. Of course, the present invention can be applied not only to the headlamp but also to a rear lamp such as a rear combination lamp. Furthermore, the present invention can be applied not only to automobiles but also to other vehicles and the like, and the same effects as those of the above embodiment can be obtained.
[0030]
【The invention's effect】
As described above, according to the present invention, the flow of gas in the lamp is regulated by providing a rectifying plate in this type of automobile lamp, thereby effectively preventing condensation on the lens surface. Ensuring high anti-fogging performance. This makes it possible to maintain appropriate and good lamp performance over a long period of time.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration example of an automobile lamp in an embodiment of the present invention.
FIG. 2 is a perspective view showing a specific configuration example of a bracket and a current plate according to the embodiment of the present invention.
FIG. 3 is a perspective view showing an example of a partition area ratio of a current plate according to the embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a configuration example of a conventional automobile lamp.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bracket 2 Current plate 10 Headlamp 11 Low beam unit 12 High beam unit 13 Bracket 15 Housing 16 Extension material 16d, 16e Extension material opening 17 Outer lens K1, K2 Gap

Claims (3)

A housing, a low beam unit and a high beam unit arranged in parallel in the housing, and an extension material disposed in front of these beam units and formed with an opening for emitting light from each beam unit to the outside An automotive lamp comprising an outer lens covered from the front on the housing,
An automotive lamp characterized in that a rectifying plate is provided so as to block moisture generated on the low beam irradiation surface of the outer lens from flowing into the high beam unit side through a gap between the extension material and the low beam unit. The rectifying plate, characterized in that it is configured in a bracket integrally supporting the high beam unit to the housing, automotive lamp according to claim 1. The automotive lamp according to claim 1 or 2 , wherein the high beam unit is arranged below the low beam unit.

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