JP2009158265A - Ventilated lighting fixture for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle's lighting fixture capable of eliminating clouding of its outer lens by a rising air heated by a light source 4. <P>SOLUTION: A ventilated lighting fixture for vehicle has: a light source 4 in a light room 3 defined by a housing 1 and an outer lens 2; and a ventilation hole 1a1 for causing air heated by a light source 4 and going up in the light room 3 to go out of the light room 3, the hole being arranged on the rear wall 1a of the housing 1 near the ceiling 1b of the housing 1, a flow path of the rising air heated by the light source 4 is connected to the vicinity of the outer lens 2 with tubular members 10a and 10b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  According to the present invention, a light source is arranged in a lamp chamber defined by a housing and an outer lens, and a ventilation hole for discharging the air heated by the light source and rising in the lamp chamber to the outside of the lamp chamber is provided on the rear wall portion of the housing. Of these, the present invention relates to a vehicular lamp with a ventilation hole disposed in the vicinity of the ceiling of the housing.

  In particular, the present invention relates to a vehicular lamp with a ventilation hole that can reduce fogging of an outer lens by using an ascending air current heated by a light source.

  Conventionally, a light source is disposed in a lamp chamber defined by a housing and an outer lens, and a ventilation hole for discharging the air heated by the light source and rising in the lamp chamber to the outside of the lamp chamber is formed in the rear wall portion of the housing. There is known a vehicular lamp with a ventilation hole arranged in the vicinity of the ceiling of the housing. An example of this type of vehicular lamp with a ventilation hole is disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-51212.

  In the vehicular lamp with a ventilation hole described in Japanese Patent Laid-Open No. 2003-51212, a light source (discharge lamp bulb) is disposed in a lamp chamber defined by a housing (lamp housing) and an outer lens (lens). In addition, the air heated by the light source (discharge lamp bulb) and rising in the lamp chamber is a ventilation hole (a first hole) disposed in the vicinity of the ceiling portion of the housing (lamp housing) in the rear wall portion of the housing (lamp housing). 2) to the outside of the lamp chamber.

  Specifically, in the vehicular lamp with a ventilation hole described in Japanese Patent Application Laid-Open No. 2003-51212, not only the air heated by the light source (discharge lamp bulb) but also the air heated by the lighting control circuit And is discharged out of the lamp chamber through the ventilation hole (second opening).

  By the way, in the vehicular lamp with a ventilation hole described in Japanese Patent Application Laid-Open No. 2003-51212, an outside air introduction hole (first opening) communicating with the outside of the lamp chamber on the flow path of the rising airflow of air heated by the light source. Is provided.

  That is, in the vehicular lamp with a ventilation hole described in Japanese Patent Laid-Open No. 2003-51212, the air outside the lamp chamber is caused to flow through the outside air introduction hole (first opening) by the rising airflow of the air heated by the light source. Are introduced into the lamp chamber, then raised in the lamp chamber, and then discharged out of the lamp chamber through the ventilation hole (second opening).

  In other words, in the vehicular lamp with a ventilation hole described in Japanese Patent Application Laid-Open No. 2003-51212, the air in the vicinity of the outer lens (lens) is not affected by the rising airflow of the air heated by the light source.

  Therefore, in the vehicular lamp with a ventilation hole described in Japanese Patent Application Laid-Open No. 2003-51212, when the air near the outer lens (lens) contains moisture, the air is cooled by the outer lens (lens). The outer lens (lens) may become cloudy.

  That is, the vehicular lamp with a ventilation hole described in Japanese Patent Application Laid-Open No. 2003-51212 cannot reduce the fogging of the outer lens (lens) using the rising airflow of the air heated by the light source.

JP 2003-51212 A

  An object of this invention is to provide the vehicle lamp with a ventilation hole which can reduce the cloudiness of an outer lens using the rising airflow of the air warmed by the light source.

  According to the first aspect of the present invention, the light source is disposed in the lamp chamber defined by the housing and the outer lens, and the ventilation hole for discharging the air heated by the light source and rising in the lamp chamber to the outside of the lamp chamber. In the vehicular lamp with a ventilation hole disposed in the vicinity of the ceiling portion of the housing in the rear wall portion of the housing, a tubular member connects the flow path of the rising air current heated by the light source and the vicinity of the outer lens. There is provided a vehicular lamp with a ventilation hole.

  According to the second aspect of the present invention, the reflector for reflecting the light emitted from the light source, the shade for blocking a part of the reflected light from the reflector, and the light not blocked by the shade are projected. And a connecting member for connecting the reflector and the projection lens, and an updraft forming space for forming the updraft is defined by the reflector, the projection lens and the connecting member, and is outside the updraft forming space. An inlet opening for allowing the air to flow into the updraft forming space is formed in the lower portion of the connecting member, and an outlet opening for allowing the air in the updraft forming space to flow out of the updraft forming space is formed on the connecting member. The vehicular lamp with a ventilation hole according to claim 1, wherein the vehicular lamp is formed in an upper portion.

  According to the third aspect of the present invention, the inlet hole of the tubular member is disposed in the vicinity of the corner of the outer lens, and the outlet hole of the tubular member is disposed below the inlet opening of the updraft forming space. A vehicle lamp with a ventilation hole according to claim 2 is provided.

  According to the invention of claim 4, a part of the tubular member is formed integrally with the housing, the remaining part of the tubular member is formed as a separate member from the housing, and the remaining part of the tubular member is formed in the housing. The vehicular lamp with a ventilation hole according to claim 3, wherein a tubular member is formed by being attached.

  According to the fifth aspect of the present invention, the first hole having the inlet hole near the corner on the center side of the vehicle and the lower side of the outer lens and the outlet hole below the inlet opening of the ascending air flow formation space. And a second tubular member having an inlet hole near the corner on the side of the vehicle and on the upper side of the outer lens, and having an outlet hole below the inlet opening of the ascending air flow forming space. The vehicular lamp with a ventilation hole according to claim 2 is provided.

  In the vehicular lamp with the ventilation hole according to the first aspect, the light source is disposed in the lamp chamber defined by the housing and the outer lens. Further, the air heated by the light source and raised in the lamp chamber is discharged out of the lamp chamber through a ventilation hole disposed in the vicinity of the ceiling portion of the housing in the rear wall portion of the housing.

  Furthermore, in the vehicular lamp with a ventilation hole according to claim 1, the flow path of the rising airflow of air heated by the light source and the vicinity of the outer lens are connected by a tubular member.

  Specifically, in the vehicular lamp with a ventilation hole according to claim 1, the air in the vicinity of the outer lens is sucked through the tubular member by the rising airflow of the air heated by the light source. That is, in the vehicular lamp with a ventilation hole according to claim 1, the air in the vicinity of the outer lens is kept away from the vicinity of the outer lens by the suction force accompanying the rising air current of the air heated by the light source.

  Therefore, according to the vehicular lamp with a ventilation hole according to claim 1, when the air in the vicinity of the outer lens contains moisture, the air may be cooled by the outer lens and the outer lens may be clouded. Can be reduced.

  That is, according to the vehicular lamp with the ventilation hole according to the first aspect, the fogging of the outer lens can be reduced by using the rising airflow of the air heated by the light source.

  In the vehicle lamp with a ventilation hole according to claim 2, the reflector for reflecting the light emitted from the light source, the shade for blocking a part of the reflected light from the reflector, and the light not blocked by the shade A projection lens for projecting and a connecting member for connecting the reflector and the projection lens are provided.

  Furthermore, in the vehicular lamp with a ventilation hole according to claim 2, the updraft forming space for forming the updraft is defined by the reflector, the projection lens, and the connecting member. Moreover, the inlet opening for the air outside an updraft formation space to flow in into an updraft formation space is formed in the lower part of a connection member. Further, an outlet opening for allowing the air in the updraft forming space to flow out of the updraft forming space is formed in the upper portion of the connection member.

  That is, in the vehicular lamp with a ventilation hole according to claim 2, a large updraft forming space is not defined by the housing and the outer lens, but a small updraft forming space is formed by the reflector, the projection lens, and the connecting member. Is defined.

  Therefore, according to the vehicular lamp with a ventilation hole according to claim 2, the air in the updraft formation space can be heated to a higher temperature than when a large updraft formation space is defined, and thereby stronger. An updraft can be formed.

  As a result, according to the vehicular lamp with a ventilation hole according to claim 2, the wet air in the vicinity of the outer lens is moved from the vicinity of the outer lens by a stronger suction force than in the case where a large ascending air flow formation space is defined. You can keep away.

  In the vehicular lamp with the ventilation hole according to the third aspect, the inlet hole of the tubular member is disposed in the vicinity of the corner of the outer lens that is most easily clouded. Furthermore, the outlet hole of the tubular member is disposed below the inlet opening of the updraft forming space where the suction force by the updraft is strongest. Therefore, according to the vehicular lamp with the ventilation hole according to the third aspect, fogging of the outer lens can be most effectively reduced.

  In the vehicle lamp with a ventilation hole according to claim 4, a part of the tubular member is formed integrally with the housing. Further, the remaining part of the tubular member is formed as a member separate from the housing. Further, the tubular member is formed by attaching the remaining portion of the tubular member to the housing.

  Therefore, according to the vehicular lamp with the ventilation hole according to claim 4, the flexible tubular member formed as a member separate from the housing is positioned relative to the housing and attached to the housing. Attachment of the tubular member can be facilitated.

  That is, according to the vehicular lamp with a ventilation hole according to the fourth aspect, the flexible tubular member formed as a separate member from the housing is positioned and attached to the housing. The assemblability of the entire lamp can be improved.

  In the vehicular lamp with a ventilation hole according to claim 5, the vehicle has an entrance hole in the vicinity of the corner on the center side of the vehicle and the lower side of the outer lens, and the exit hole is provided below the entrance opening of the updraft forming space. A first tubular member having an inlet hole in the vicinity of the corner on the side of the vehicle and on the upper side of the outer lens, and a second tubular member having an outlet hole below the inlet opening of the updraft forming space; Is provided.

  Therefore, according to the vehicular lamp with the ventilation hole according to the fifth aspect, it is possible to efficiently reduce the fogging of the most easily fogged portion of the outer lens. Specifically, according to the vehicular lamp with a ventilation hole according to claim 5, the fogging of the corner on the center side of the vehicle and the lower side of the outer lens, and the corner on the side of the vehicle and the upper side of the outer lens It is possible to efficiently reduce the fogging of.

  In other words, according to the vehicular lamp with a ventilation hole according to claim 5, when the vehicular lamp is slanted so as to go from the front of the vehicle to the side of the vehicle, the outermost of the outer lenses. It is possible to efficiently reduce the fogging of the portion that tends to be cloudy.

  Hereinafter, 1st Embodiment of the vehicle lamp with a ventilation hole of this invention is described. FIG. 1 and FIG. 2 are views showing a vehicular lamp with a ventilation hole according to the first embodiment. Specifically, FIG. 1 is a perspective view of a vehicular lamp with a ventilation hole according to the first embodiment viewed from the left front side and the upper side of the vehicular lamp, and FIG. 2A is a first view viewed from the left side of the vehicular lamp. FIG. 2B is a cross-sectional view of the vehicular lamp with a ventilation hole of the first embodiment as viewed from the right side of the vehicular lamp.

  In the vehicular lamp with a ventilation hole of the first embodiment, as shown in FIG. 2, a light source 4 is disposed in a lamp chamber 3 defined by a housing 1 and an outer lens 2. In addition, a reflector 5 for reflecting light emitted from the light source 4, a shade 6 for blocking a part of the reflected light from the reflector 5, and a projection lens 7 for projecting light not blocked by the shade 6. And a connecting member 8 for connecting the reflector 5 and the projection lens 7 is provided.

  Furthermore, in the vehicular lamp with a ventilation hole according to the first embodiment, as shown by arrows in FIGS. 1 and 2, the air heated by the light source 4 and moved up in the lamp chamber 3 becomes the rear wall portion of the housing 1. Of 1a, it is discharged | emitted out of the lamp chamber 3 through the ventilation hole 1a1 arrange | positioned in the vicinity of the ceiling part 1b of the housing 1. FIG.

  Specifically, in the vehicular lamp with a ventilation hole according to the first embodiment, as shown in FIG. 2, an updraft forming space 9 for forming an updraft is formed by the reflector 5, the projection lens 7, and the connecting member 8. Is defined. An inlet opening 8 a 1 for allowing air outside the updraft forming space 9 to flow into the updraft forming space 9 is formed in the lower portion 8 a of the connecting member 8. Furthermore, an outlet opening 8 b 1 through which the air in the updraft forming space 9 flows out of the updraft forming space 9 is formed in the upper portion 8 b of the connection member 8.

  Further, in the vehicular lamp with a ventilation hole according to the first embodiment, as shown in FIG. 1, there is an upward flow of air heated by the light source 4 (see FIG. 2) and the vicinity of the outer lens 2. Are connected by tubular members 10a and 10b.

  Specifically, in the vehicular lamp with a ventilation hole according to the first embodiment, as shown by arrows in FIG. 1, the air in the vicinity of the outer lens 2 is increased by the air heated by the light source 4 (see FIG. 2). The air current is sucked through the tubular members 10a and 10b. That is, in the vehicular lamp with a ventilation hole of the first embodiment, the air in the vicinity of the outer lens 2 is moved away from the vicinity of the outer lens 2 by the suction force accompanying the rising airflow of the air warmed by the light source 4.

  More specifically, in the vehicular lamp with a ventilation hole of the first embodiment, as shown in FIG. 1, the inlet hole 10a1 of the tubular member 10a has the most cloudy vehicle center side (right side in FIG. 1) and the outer The lens 2 is disposed in the vicinity of the corner 2a on the lower side (lower side in FIG. 1). Furthermore, the outlet hole 10a2 of the tubular member 10a is disposed below the inlet opening 8a1 (see FIG. 2A) of the updraft forming space 9 (see FIG. 2A) where the suction force by the updraft is strongest. ing. Further, the inlet hole 10b1 of the tubular member 10b is disposed in the vicinity of the corner 2b on the side surface (left side in FIG. 1) and the upper side (upper side in FIG. 1) of the outer lens 2 that is most easily cloudy. Further, the outlet hole 10b2 of the tubular member 10b is disposed below the inlet opening 8a1 (see FIG. 2B) of the updraft forming space 9 (see FIG. 2B) where the suction force by the updraft is strongest. ing.

  Therefore, according to the vehicular lamp with ventilation holes of the first embodiment, as shown in FIG. 1, when the vehicular lamp is slanted so as to go around from the front of the vehicle to the side of the vehicle, The corner 2a on the center side (right side in FIG. 1) and the lower side (lower side in FIG. 1) of the outer lens 2 which is the most cloudy part, and the side surface side (in FIG. 1). The fogging at the corner 2b on the left side and the upper side of the outer lens 2 (upper side in FIG. 1) can be efficiently reduced.

  In other words, according to the vehicular lamp with a ventilation hole of the first embodiment, when the air near the outer lens 2 contains moisture, the outer lens 2 cools the air, and the outer lens 2 The risk of fogging can be reduced. That is, the fogging of the outer lens 2 can be reduced using the rising airflow of the air warmed by the light source 4.

  Furthermore, in the vehicular lamp with a ventilation hole of the first embodiment, a guide portion 8b2 is provided on the upper portion 8b of the connection member 8, as shown in FIG. Therefore, according to the vehicular lamp with a ventilation hole of the first embodiment, as indicated by an arrow in FIG. 2, the air heated by the updraft forming space 9 and rising upward in the vertical direction (upward in FIG. 2) The flow can be directed to the ventilation hole 1a1 on the rear side of the vehicle lamp (the left side of FIG. 2A and the right side of FIG. 2B).

  Further, in the vehicular lamp with the ventilation hole according to the first embodiment, as shown in FIG. 2, the housing 1 and the outer lens 2 do not define a large updraft forming space, but the reflector 5 and the projection lens 7. And the connecting member 8 define a small updraft forming space 9.

  Therefore, according to the vehicular lamp with a ventilation hole of the first embodiment, the air in the updraft forming space 9 can be heated to a higher temperature than when a large updraft forming space is defined. A strong updraft can be formed. As a result, the moist air near the corners 2a and 2b of the outer lens 2 is moved away from the vicinity of the corners 2a and 2b of the outer lens 2 with a stronger suction force than when a large updraft forming space is defined. Can do.

  Further, in the vehicular lamp with a ventilation hole according to the first embodiment, as shown in FIG. 1, flexible tubular members 10 a and 10 b are provided as members separate from the housing 1. Further, in the housing 1, the entrance hole 10 a 1 of the tubular member 10 a is positioned in the vicinity of the corner 2 a on the center side of the vehicle (right side in FIG. 1) and below the outer lens 2 (lower side in FIG. 1). It is attached. As shown in FIGS. 1 and 2A, the outlet hole 10a2 of the tubular member 10a is located below the inlet opening 8a1 of the updraft forming space 9 and on the flow path of the updraft of air. Thus, it is attached to the bottom 1c of the housing 1.

  Furthermore, in the vehicular lamp with a ventilation hole according to the first embodiment, as shown in FIG. 1, the inlet hole 10b1 of the tubular member 10b is on the side of the vehicle (left side in FIG. 1) and above the outer lens 2 (see FIG. 1 is attached to the housing 1 so as to be positioned in the vicinity of the corner 2b. Further, as shown in FIGS. 1 and 2B, the outlet hole 10b2 of the tubular member 10b is located below the inlet opening 8a1 of the ascending air flow formation space 9 and on the flow path of the ascending air current. Thus, it is attached to the bottom 1c of the housing 1.

  In the vehicle lamp with a ventilation hole of the first embodiment, an assembly including the light source 4, the reflector 5, the shade 6, the projection lens 7, and the connection member 8 includes a ball joint (not shown) and an aiming screw ( It is supported by the rear wall 1a of the housing 1 via a not-shown).

  FIG. 3 is a view showing a tubular member 10a of the vehicular lamp with a ventilation hole according to the second embodiment. Specifically, FIG. 3A is a perspective view of the tubular member 10a of the vehicular lamp with a ventilation hole of the second embodiment in a state attached to the bottom 1c of the housing 1 as seen from the right front side and the upper side of the vehicular lamp. 3B is a perspective view of the tubular member 10a of the vehicular lamp with a vent hole according to the second embodiment when viewed from the right front side and the upper side of the vehicular lamp in a state of being attached to the bottom 1c of the housing 1. FIG. It is.

  In the vehicular lamp with a ventilation hole according to the first embodiment, as shown in FIG. 1, the tubular member 10 a is formed as a flexible member separate from the housing 1, and the tubular member 10 a is attached to the housing 1. In the vehicular lamp with a ventilation hole according to the second embodiment, the wall portions 1c1 and 1c2 constituting a part of the tubular member 10a are provided at the bottom of the housing 1 as shown in FIG. It is molded integrally with 1c. In the vehicular lamp with a ventilation hole of the second embodiment, the remaining portion 10a ′ of the tubular member 10a is formed as a separate member from the bottom 1c of the housing 1, as shown in FIG. The Specifically, in the vehicular lamp with a ventilation hole according to the second embodiment, the remaining portion 10a ′ of the tubular member 10a is attached to the bottom 1c of the housing 1 as shown in FIGS. 3 (A) and 3 (B). The tubular member 10a is formed by attaching.

  Therefore, according to the vehicular lamp with a ventilation hole of the second embodiment, the flexible tubular member 10 a formed as a member separate from the housing 1 is positioned and attached to the housing 1. The tubular member 10a can be easily attached to the housing 1. That is, according to the vehicular lamp with a ventilation hole of the second embodiment, the flexible tubular member 10 a formed as a member separate from the housing 1 is positioned and attached to the housing 1. As a result, the assemblability of the entire vehicle lamp can be improved.

  The vehicular lamp with a ventilation hole of the present invention can be applied to a vehicular lamp such as a headlamp.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicular lamp with a ventilation hole according to a first embodiment as viewed from the left front side and the upper side of the vehicular lamp. It is sectional drawing of the vehicle lamp with a ventilation hole of 1st Embodiment. It is the figure which showed the tubular member 10a of the vehicle lamp with a ventilation hole of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 1a Rear wall part 1a1 Ventilation hole 1b Ceiling part 1c Bottom part 2 Outer lens 3 Lamp chamber 4 Light source 5 Reflector 6 Shade 7 Projection lens 8 Connecting member 8a Lower part 8a1 Inlet opening 8b Upper part 8b1 Outlet opening 8b2 Guide part 9 Ascending Airflow forming spaces 10a, 10b Tubular members 10a1, 10b1 Inlet holes 10a2, 10b2 Outlet holes

Claims (5)

A light source is arranged in the lamp chamber defined by the housing and the outer lens;
In the vehicular lamp with ventilation holes, the ventilation holes for discharging the air heated by the light source and rising in the lamp chamber to the outside of the lamp chamber are arranged in the vicinity of the ceiling portion of the housing in the rear wall portion of the housing.
A vehicular lamp with a ventilation hole, characterized in that a tubular member is used to connect a flow path of an ascending air current heated by a light source and the vicinity of an outer lens. A reflector for reflecting light emitted from a light source, a shade for blocking a part of the reflected light from the reflector, a projection lens for projecting light not blocked by the shade, and a reflector and a projection lens A connection member for connection,
An updraft forming space for forming the updraft is defined by the reflector, the projection lens, and the connecting member, and an inlet opening for the air outside the updraft forming space to flow into the updraft forming space is provided below the connecting member. 2. The vehicle with a ventilated hole according to claim 1, wherein an outlet opening is formed in the upper portion of the connecting member, and an outlet opening is formed in the upper portion of the connection member. Light fixture. Place the inlet hole of the tubular member near the corner of the outer lens,
The vehicular lamp with a ventilation hole according to claim 2, wherein the outlet hole of the tubular member is disposed below the inlet opening of the updraft forming space. Molding a portion of the tubular member integrally with the housing;
Forming the remainder of the tubular member as a separate member from the housing;
4. The vehicular lamp with a ventilation hole according to claim 3, wherein the tubular member is formed by attaching the remaining portion of the tubular member to the housing. A first tubular member having an inlet hole in the vicinity of the corner on the center side of the vehicle and the lower side of the outer lens, and having an outlet hole on the lower side of the inlet opening of the updraft forming space;
A second tubular member having an inlet hole in the vicinity of the side of the vehicle and near the upper corner of the outer lens and having an outlet hole below the inlet opening of the ascending air flow forming space is provided. The vehicular lamp with a ventilation hole according to claim 2.

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