JP2020107466A - Lighting device for vehicle - Google Patents

Lighting device for vehicle Download PDF

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JP2020107466A
JP2020107466A JP2018244443A JP2018244443A JP2020107466A JP 2020107466 A JP2020107466 A JP 2020107466A JP 2018244443 A JP2018244443 A JP 2018244443A JP 2018244443 A JP2018244443 A JP 2018244443A JP 2020107466 A JP2020107466 A JP 2020107466A
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housing
lighting device
breathing hole
air
vehicle
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JP7420359B2 (en
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隆憲 林田
Takanori Hayashida
隆憲 林田
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Daihatsu Motor Co Ltd
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Daihatsu Motor Co Ltd
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Abstract

To provide a lighting device for a vehicle that can improve anti-fogging properties by discharging water vapor and improving air convection inside a lamp chamber concurrently.SOLUTION: A lighting device for a vehicle includes: a cone-shaped recess part 4 formed at an inner surface of a housing 3 for storing a light emitter; and a respiration hole 8 provided in a bottom part 6 of the recess part 4 to communicate between the inside and the outside of the housing 3, where the cone-shaped recess part 4 increases a current speed of air discharged with water vapor from the respiration hole 8, and the increased current speed of the air passing through the recess part 4 and the respiration hole 8 improves air convection inside a lamp chamber due to heat generated by the light emitter.SELECTED DRAWING: Figure 3

Description

本発明は、発光体を収容するハウジングの内外を連通する呼吸穴が設けられた自動車用灯火器に関するものである。 The present invention relates to a vehicle lighting device provided with a breathing hole that communicates the inside and the outside of a housing that houses a light emitting body.

一般に、自動車用灯火器では、その内部に結露による曇りを生じさせないことが重要であり、自動車用灯火器の内部の曇りを防止するための手段として、内部の水蒸気を排出する呼吸穴を設けることがある。 In general, it is important to prevent fog from forming inside the lighting equipment for automobiles, and as a means to prevent fog inside the lighting equipment for automobiles, provide a breathing hole for discharging water vapor inside. There is.

このような呼吸穴を設けた技術として、例えば特許文献１は、ハウジングに穿設した呼吸穴に、ハウジング内部に開口する空気通路を設けた自動車用灯具を開示している。 As a technique of providing such a breathing hole, for example, Patent Document 1 discloses a vehicle lamp in which a breathing hole formed in a housing is provided with an air passage opening inside the housing.

特開昭６２−１６０６０１号公報（請求項１）JP-A-62-160601 (claim 1)

ところが、特許文献１の自動車用灯具は、呼吸穴に空気通路を付加する分、灯室内における空気の流れを阻害しやすく、自動車用灯具の防曇性を低下させるおそれがある。 However, the automotive lamp of Patent Document 1 is likely to impede the air flow in the lamp chamber due to the addition of the air passage to the breathing hole, which may reduce the anti-fogging property of the automotive lamp.

これに対し、呼吸穴に付加する空気通路を省略することが考えられるが、水や土埃が呼吸穴から灯室内に侵入するのを阻止するためのゴムキャップなどを必要とする分、灯室内における空気の流れを十分に高めることができず、防曇性の改善が不十分になりやすい。 On the other hand, it is possible to omit the air passage added to the breathing hole, but because a rubber cap etc. is required to prevent water and dust from entering the light chamber through the breathing hole, The air flow cannot be sufficiently increased, and the antifogging property tends to be insufficiently improved.

本発明は、水蒸気を排出すると同時に、灯室内の空気対流を向上することで、防曇性を改善することのできる自動車用灯火器の提供を目的とする。 An object of the present invention is to provide a vehicle lighting device capable of improving anti-fogging property by discharging steam and improving air convection in the lamp chamber.

上記目的を達成するために、本発明に係る自動車用灯火器は、発光体を収容するハウジングの内外を連通する呼吸穴を設け、この呼吸穴を、ハウジングの内面に形成したすり鉢状の凹部の底部に設けたものである。 In order to achieve the above object, the vehicle lighting device according to the present invention is provided with a breathing hole that communicates the inside and the outside of a housing that houses a luminous body, and the breathing hole is formed in a mortar-shaped recess formed on the inner surface of the housing. It is provided on the bottom.

以上のとおり、本発明によると、発光体を収容するハウジングの内面にすり鉢状の凹部を形成し、この凹部の底部にハウジングの内外を連通する呼吸穴を設けるので、呼吸穴から水蒸気を伴って排出される空気の流速を凹部のすり鉢形状によって高めて、自動車用灯火器の防曇性を向上させることができる。 As described above, according to the present invention, a mortar-shaped recess is formed on the inner surface of the housing that accommodates the luminous body, and the bottom of this recess is provided with a breathing hole that communicates the inside and outside of the housing. The flow velocity of the discharged air can be increased by the mortar shape of the recess to improve the antifogging property of the automotive lighting device.

しかも、発光体を収容するハウジングの内面に凹部を形成するので、この凹部及び呼吸穴を通過する空気の流速を高めて、発光体の発熱による灯室内の空気対流を向上させることができ、自動車用灯火器の防曇性をさらに改善することができる。 Moreover, since the concave portion is formed on the inner surface of the housing that accommodates the luminous body, the flow velocity of the air passing through the concave portion and the breathing hole can be increased to improve the air convection in the lamp chamber due to the heat generation of the luminous body. It is possible to further improve the anti-fogging property of the lighting equipment.

本発明に係る自動車用灯火器を備えた車両の正面図Front view of a vehicle equipped with a vehicle lighting device according to the present invention 自動車用灯火器の正面図Front view of automotive lighting 図２のＡ−Ａ断面図AA sectional view of FIG. 図２のＢ−Ｂ断面図BB sectional view of FIG.

以下、本発明に係る自動車用灯火器を実施するための形態について、図面を用いて説明する。 Hereinafter, modes for carrying out a vehicle lighting device according to the present invention will be described with reference to the drawings.

図１に示すように、自動車用灯火器１は、例えば、夜間に車両２の前方を照射することによって交通上の障害物を適切に確認するための走行用前照灯であり、車両２の前端部における左右の側部に設けられる。なお、自動車用灯火器１は、走行用前照灯に限らず、例えば、ブレーキランプやストップランプ、ターンランプ、バック時点灯用ランプなどを組み合わせたリアコンビネーションであってもよい。 As shown in FIG. 1, the vehicle lighting device 1 is, for example, a traveling headlight for appropriately confirming an obstacle in traffic by illuminating the front of the vehicle 2 at night. It is provided on the left and right sides of the front end. The vehicle lighting device 1 is not limited to the traveling headlight, and may be a rear combination in which a brake lamp, a stop lamp, a turn lamp, a back lighting lamp, and the like are combined.

図２〜図４に示すように、自動車用灯火器１は、ハウジング３にＬＥＤなどの発光体を収容してなり、ハウジング３の内面にすり鉢状の凹部４、５を形成し、この凹部４、５の底部６、７にハウジング３の内外を連通する呼吸穴８、９を設けたものである。 As shown in FIGS. 2 to 4, a vehicle lighting device 1 includes a housing 3 in which a light-emitting body such as an LED is housed, and mortar-shaped recesses 4 and 5 are formed on the inner surface of the housing 3. Breathing holes 8 and 9 for communicating the inside and outside of the housing 3 are provided in the bottom portions 6 and 7 of the housing 5.

図２及び図３に示すように、凹部４及び呼吸穴８は、ハウジング３の背面の上端付近に設けられ、発光体の発熱による対流に伴って上昇する空気と共にハウジング３の内部の水蒸気を排出するようになっている。 As shown in FIGS. 2 and 3, the concave portion 4 and the breathing hole 8 are provided near the upper end of the rear surface of the housing 3, and discharge the water vapor inside the housing 3 together with the air rising due to the convection due to the heat generation of the light emitting body. It is supposed to do.

凹部４は、断面円形のすり鉢形状の下部を平面で切り欠いた形状とされ、ハウジング３の背面を外側に押し出すように形成されている。凹部４の底部６は、小径の円筒の下部を平面で切り欠いた形状に形成され、その中央穴が呼吸穴８とされる。底部６には、外側からゴムキャップ１０が被せられ、呼吸穴８からハウジング３の内部に水や土埃が侵入するのを防止しつつ、底部６の下部の切欠部分１１に迂回させるようにして空気及び水蒸気を排出するようになっている。 The recess 4 is formed by cutting out a lower portion of a mortar shape having a circular cross section with a flat surface, and is formed so as to push the back surface of the housing 3 to the outside. The bottom portion 6 of the recess 4 is formed by cutting a lower portion of a small-diameter cylinder in a plane, and a central hole thereof serves as a breathing hole 8. The bottom portion 6 is covered with a rubber cap 10 from the outside to prevent water and dust from entering the inside of the housing 3 through the breathing hole 8 and to bypass the cutout portion 11 at the bottom of the bottom portion 6. And it is designed to discharge water vapor.

図２及び図４に示すように、凹部５及び呼吸穴９は、ハウジング３の背面の下端付近に設けられ、発光体の発熱による対流により、呼吸穴８からの空気及び水蒸気の排出に対応して、外部からハウジング３の内部に空気を吸引するようになっている。 As shown in FIGS. 2 and 4, the recess 5 and the breathing hole 9 are provided near the lower end of the back surface of the housing 3 and correspond to the discharge of air and water vapor from the breathing hole 8 by the convection due to the heat generation of the light emitting body. Air is sucked into the housing 3 from the outside.

凹部５は、断面円形のすり鉢形状の下部を平面で切り欠いた形状とされ、ハウジング３の背面を外側に押し出すように形成されている。凹部５の底部７は、小径の円筒の下部を平面で切り欠いた形状に形成され、その中央穴が呼吸穴９とされる。底部７には、外側からゴムキャップ１２が被せられ、呼吸穴９からハウジング３の内部に水や土埃が侵入するのを防止しつつ、底部７の下部の切欠部分１３に迂回させるようにして空気を吸引するようになっている。 The concave portion 5 is formed by cutting out a lower portion of a mortar shape having a circular cross section with a flat surface, and is formed to push the back surface of the housing 3 to the outside. The bottom portion 7 of the recess 5 is formed by cutting out a lower portion of a small-diameter cylinder with a plane, and a central hole thereof is a breathing hole 9. The bottom portion 7 is covered with a rubber cap 12 from the outside to prevent water and dust from entering the inside of the housing 3 through the breathing hole 9 and to bypass the cutout portion 13 at the bottom of the bottom portion 7. Is designed to be sucked.

上記構成によれば、ＬＥＤなどの発光体を収容するハウジング３の背面の上端付近に呼吸穴８を設け、ハウジング３の背面の下端付近に呼吸穴９を設けている。これにより、発光体の発熱によるハウジング３の内部における対流を利用して、上側の呼吸穴８から空気と共に水蒸気を排出し、上側の呼吸穴８から外部の空気を吸引することができ、ハウジング３の内部から水蒸気を排出して自動車用灯火器１の防曇性の向上を図ることができる。 According to the above configuration, the breathing hole 8 is provided near the upper end of the back surface of the housing 3 that houses the light emitting body such as the LED, and the breathing hole 9 is provided near the lower end of the back surface of the housing 3. Thus, by utilizing convection inside the housing 3 due to heat generated by the light emitting body, water vapor can be discharged together with air from the upper breathing hole 8 and external air can be sucked from the upper breathing hole 8. It is possible to improve the antifogging property of the vehicle lighting device 1 by discharging water vapor from the inside.

しかも、上側の呼吸穴８をすり鉢状の凹部４の底部６に設けるので、呼吸穴８から排出される空気及び水蒸気の流速を凹部４のすり鉢形状によって高めて、灯室内の空気対流を向上させ、自動車用灯火器１の防曇性をさらに改善することができる。また、下側の呼吸穴９をすり鉢状の凹部５の底部７に設けるので、呼吸穴９から吸引される空気の流速を凹部５のすり鉢形状によって抑えることができ、ハウジング３の内部における対流の乱れを防止することができる。 Moreover, since the upper breathing hole 8 is provided in the bottom portion 6 of the mortar-shaped recess 4, the flow velocity of air and water vapor discharged from the breathing hole 8 is increased by the mortar shape of the recess 4 to improve air convection in the lamp chamber. The antifogging property of the automotive lighting device 1 can be further improved. Further, since the lower breathing hole 9 is provided in the bottom portion 7 of the mortar-shaped recess 5, the flow velocity of the air sucked from the breathing hole 9 can be suppressed by the mortar shape of the recess 5, and the convection inside the housing 3 Disturbance can be prevented.

１ 自動車用灯火器
２ 車両
３ ハウジング
４ 凹部（上側）
５ 凹部（下側）
６ 底部（上側）
７ 底部（下側）
８ 呼吸穴（上側）
９ 呼吸穴（下側）
１０ ゴムキャップ（上側）
１１ 切欠部分（上側）
１２ ゴムキャップ（下側）
１３ 切欠部分（下側） 1 Automotive Lighting 2 Vehicle 3 Housing 4 Recess (Upper)
5 recess (lower side)
6 Bottom (upper side)
7 Bottom (lower side)
8 Breathing hole (upper side)
9 Breathing hole (lower side)
10 Rubber cap (upper side)
11 Notch (upper side)
12 Rubber cap (lower side)
13 Notch (lower side)

Claims (1)

発光体を収容するハウジングの内外を連通する呼吸穴が設けられ、該呼吸穴は、ハウジングの内面に形成されたすり鉢状の凹部の底部に設けられたことを特徴とする自動車用灯火器。 A lighting device for an automobile, characterized in that a breathing hole that communicates with the inside and outside of a housing that accommodates the light emitting body is provided, and the breathing hole is provided at the bottom of a mortar-shaped recess formed on the inner surface of the housing.
JP2018244443A 2018-12-27 2018-12-27 Automotive lights Active JP7420359B2 (en)

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JP2018244443A JP7420359B2 (en) 2018-12-27 2018-12-27 Automotive lights

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JP2020107466A true JP2020107466A (en) 2020-07-09
JP7420359B2 JP7420359B2 (en) 2024-01-23

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007220518A (en) * 2006-02-17 2007-08-30 Koito Mfg Co Ltd Vehicular lamp
JP2014146511A (en) * 2013-01-29 2014-08-14 Ichikoh Ind Ltd Vehicle lamp fitting
CN207080938U (en) * 2017-08-30 2018-03-09 江苏远洋车灯有限公司 A kind of auto lamp ventilating structure
US20180106457A1 (en) * 2016-10-13 2018-04-19 Automotive Lighting Reutlingen Gmbh Motor vehicle lighting device with a ventilating device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007220518A (en) * 2006-02-17 2007-08-30 Koito Mfg Co Ltd Vehicular lamp
JP2014146511A (en) * 2013-01-29 2014-08-14 Ichikoh Ind Ltd Vehicle lamp fitting
US20180106457A1 (en) * 2016-10-13 2018-04-19 Automotive Lighting Reutlingen Gmbh Motor vehicle lighting device with a ventilating device
CN207080938U (en) * 2017-08-30 2018-03-09 江苏远洋车灯有限公司 A kind of auto lamp ventilating structure

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