WO2015083324A1 - 車両用灯具 - Google Patents
車両用灯具 Download PDFInfo
- Publication number
- WO2015083324A1 WO2015083324A1 PCT/JP2014/005691 JP2014005691W WO2015083324A1 WO 2015083324 A1 WO2015083324 A1 WO 2015083324A1 JP 2014005691 W JP2014005691 W JP 2014005691W WO 2015083324 A1 WO2015083324 A1 WO 2015083324A1
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- WIPO (PCT)
- Prior art keywords
- ventilation
- lamp
- vehicle
- ventilation member
- light source
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/30—Ventilation or drainage of lighting devices
- F21S45/33—Ventilation or drainage of lighting devices specially adapted for headlamps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V31/00—Gas-tight or water-tight arrangements
- F21V31/03—Gas-tight or water-tight arrangements with provision for venting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/30—Ventilation or drainage of lighting devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
Definitions
- the present invention relates to a vehicular lamp, specifically to a vehicular lamp disposed at the front end of a vehicle represented by a headlamp, and more particularly to a vehicular lamp suitable for quickly eliminating condensation that may occur inside. .
- the vehicular lamp is used as an illumination device that illuminates the outside in order to improve the visibility of the driver, or as a display device that transmits various signals to the outside.
- a vehicular lamp having a function as an illuminating device a headlamp and a fog lamp including a light source for headlamps can be exemplified.
- the housing of the vehicle lamp may be provided with a ventilation member that secures a ventilation path for eliminating a pressure difference between the inside and outside of the lamp chamber.
- the ventilation member serves to prevent foreign matter such as dust and water from entering the lamp chamber while eliminating the pressure difference.
- the member which comprises a waterproof ventilation film is used.
- Patent Document 1 discloses a headlamp shown in FIG.
- a translucent member 403 is mounted on the front surface of the housing 402, and a headlamp light source 404 is disposed in a lamp chamber 406 surrounded by the housing 402 and the translucent member 403.
- Openings 402A and 402B are formed in the housing 402.
- a microporous member capable of transmitting air is disposed as a ventilation member 405B so as to cover the opening 402B.
- the member 405A arranged so as to cover the opening 402A is a means for reducing condensation that allows water vapor to pass therethrough and prevents air from passing therethrough.
- the translucent member 403 is easily cooled because it is directly exposed to the outside air, and condensation is likely to occur on the inner surface thereof.
- the air in the lamp chamber 406 expands as the temperature of the translucent member 403 increases.
- the pressure difference between the inside and outside of the lamp chamber 406 thus generated is eliminated by the ventilation member 405B having air permeability.
- the water vapor generated from the condensation is released not only from the ventilation member 405B but also from the member 405A which is a means for reducing condensation.
- the member 405A does not correspond to a “ventilating member” because it cannot transmit air, and does not help to eliminate the pressure difference, but promotes the elimination of condensation.
- the translucent member of the headlamp is increasingly formed to extend from the front to the rear of the light source for the headlamp.
- the time until the dew condensation generated on the inner surface of the translucent member is eliminated tends to be longer.
- dew condensation remains on the inner surface of the translucent member for a long time, even if dew condensation is located in a part where light from the light source for headlamps is hardly transmitted, the appearance of the headlamp is reduced due to the occurrence of dew condensation. Continuation may impress the user with a decrease in headlamp performance. Further, in a headlamp in which a position lamp light source or the like is installed in a space located on the vehicle rear side of the headlamp light source, the visibility of signals from these light sources may be reduced due to condensation.
- the present invention provides a vehicular lamp including a light source for headlamps and a translucent member extending rearward from the front of the light source for headlamps, on the inner surface of the translucent member.
- An object of the present invention is to provide a vehicular lamp that can eliminate the generated condensation in a short time.
- the present invention A vehicular lamp attached to a side end of a front end portion of a vehicle, A housing; A translucent member mounted on the housing to form a lamp chamber therein; A light source for headlamps disposed in the lamp chamber and emitting light to the front side of the vehicle through the translucent member; A first ventilation member and a second ventilation member; A plane orthogonal to the optical axis of the headlamp light source and passing through the front end of the headlamp light source includes a first reference plane, the optical axis, and a plane extending along the vertical direction.
- the lamp chamber is positioned on the front side of the first reference plane, and is positioned on the inner side of the vehicle width direction of the vehicle from the second reference plane, and the lamp chamber is positioned above the first reference plane.
- a second lamp chamber located on the rear side of the vehicle and located outside of the second reference plane in the vehicle width direction,
- the translucent member is located on the front side of the first reference surface and is located on the rear side of the first reference surface from the front portion facing the first lamp chamber portion, and the second lamp.
- the first ventilation member is attached to a first opening provided in a portion of the housing facing the first lamp chamber
- the second ventilation member is attached to a second opening provided in a portion of the housing facing the second lamp chamber
- Each of the first ventilation member and the second ventilation member includes a waterproof ventilation body, Multiply the ventilation volume per unit area of the waterproof ventilation body measured according to the A method (fragile method) of the ventilation measurement method stipulated in Japanese Industrial Standard (JIS) L1096 by the ventilation area of the waterproof ventilation body.
- JIS Japanese Industrial Standard
- the vehicle lamp which can eliminate the condensation which generate
- FIG. 1 is a perspective view of a vehicle provided with a vehicular lamp according to an embodiment of the present invention. It is a perspective schematic diagram of the vehicle lamp shown in FIG. It is a perspective schematic diagram when a temperature-humidity meter is arrange
- a headlamp 101 is usually attached as a vehicular lamp to the front end of a vehicle 100 that is a passenger car.
- One headlamp 101 is disposed at each side end of the front end of the vehicle 100.
- the headlamp 101 often includes a plurality of light sources such as a light source for a high beam (traveling headlight), a light source for a low beam (passing headlight), and a light source for a position lamp (vehicle width light).
- a light source for a high beam traveling headlight
- a light source for a low beam passing headlight
- a light source for a position lamp vehicle width light
- the headlamp 101 is disposed in the housing 102, the translucent member 103 attached to the housing 102 so as to form the lamp chamber 110 therein, and the lamp chamber 110.
- a headlamp light source 104 that emits light to the front side of the vehicle 100 through the translucent member 103 is provided.
- FIG. 4A in order to divide and describe the space in the lamp chamber 110, a plane perpendicular to the optical axis L of the headlamp light source 104 and passing through the tip T of the headlamp light source 104 is shown.
- a first reference plane P1 is defined, and a plane including the optical axis L and extending along the vertical direction is defined as a second reference plane P2.
- the translucent member 103 intersects the first reference surface P1 and the second reference surface P2 from the front portion 103A that is located on the front side of the vehicle 100 from the first reference surface P1 and faces the first lamp chamber portion 110A.
- the first reference surface P1 is located on the rear side of the vehicle 100 and extends to the rear portion 103B facing the second lamp chamber portion 110B.
- the headlamp 101 is provided in the first ventilation member 105 attached to the first opening 102A provided in the housing 102 facing the first lamp chamber portion 110A and the housing 102 facing the second lamp chamber portion 110B. And a second ventilation member 106 attached to the second opening 102B.
- Both the first ventilation member 105 and the second ventilation member 106 include a waterproof ventilation body.
- the waterproof ventilation body is typically a waterproof ventilation film, but is not limited thereto, and may be a porous structure such as a porous resin molded body as long as it has a waterproof ventilation function.
- the first ventilation member 105 communicates the first lamp chamber portion 110A and the outside of the lamp chamber (typically, the engine room) via the waterproof ventilation film of the member 105, and the second ventilation member.
- 106 communicates the second lamp chamber portion 110 ⁇ / b> B and the outside of the lamp chamber via the waterproof breathable membrane of the member 106.
- the air permeability of the ventilation member may be impaired due to mud adhesion or other factors
- a large-sized headlamp it is desired to install a plurality of ventilation members in order to quickly eliminate the pressure difference between the inside and outside of the lamp chamber.
- the space of the housing 102 in which the ventilation member can be provided is limited, and the headlamp light source 104 or the like needs to be attached to the central portion of the housing 102.
- the ventilation rate of the first ventilation member 105 is larger than the ventilation rate of the second ventilation member 106.
- the ventilation rate of the ventilation member is determined based on the ventilation rate per unit area of the waterproof ventilation membrane measured in accordance with Method A (Fragile method) of the permeability measurement method stipulated in JIS L1096. Calculate by multiplying the ventilation area.
- the ventilation area means the area of a region where air can pass in the cross-sectional direction of the waterproof breathable membrane. Note that a member whose ventilation amount does not take a positive value, that is, a member that cannot transmit air, which is a gas used in the Frazier method, is not treated as a “venting member” in this specification.
- Both the first ventilation member 105 and the second ventilation member 106 are “ventilation members”, and the ventilation amount is a positive value.
- the water vapor generated in the first lamp chamber portion 110A rides on the airflow generated by the increase in pressure in the lamp chamber 110 as the temperature rises, and flows to the outside, specifically, the first vent member 105 or the first vent member. 2 It passes through the ventilation member 106 and is discharged to the outside.
- the water vapor generated in the first lamp chamber 110A the water vapor riding on the air flow toward the second ventilation member 106 flows into the second lamp chamber 110B.
- the temperature of the rear part 103B of the translucent member 103 facing the second lamp chamber part 110B is not sufficiently increased, part of the water vapor that has flowed in is condensed in the rear part 103B, and the rear part 103B. Be part of condensation in When the amount of condensation to be eliminated in the rear portion 103B increases, the time until condensation is eliminated from the entire inner surface of the translucent member 103 becomes longer.
- the ventilation rate of the first ventilation member 105 is set to be larger than the ventilation rate of the second ventilation member 106 and increasing the amount of water vapor released from the first ventilation member 105, It is possible to avoid lengthening the time until condensation is eliminated from the inner surface of the light-sensitive member 103.
- the ratio of the ventilation amount of the first ventilation member 105 to the ventilation amount of the second ventilation member 106 is preferably large.
- This ratio is preferably 2 times or more, more preferably 3 times or more, further preferably 5 times or more, particularly preferably 10 times or more, particularly preferably 50 times or more, and in some cases Is 80 times or more.
- the space of the housing 102 in which the first ventilation member 105 can be installed is limited, and in order to achieve a desired total amount of ventilation, the total amount should be distributed to the second ventilation member 106 in some cases. Many.
- the above ratio may be, for example, 10,000 times or less, further 5000 times or less, and in some cases 3000 times or less.
- the openings 102A and 102B are openings of through holes that penetrate the housing 102 in a direction parallel to the optical axis L as indicated by arrows in FIG. 4A, but the directions of the openings 102A and 102B are the same. Not exclusively.
- the through hole may be provided so as to penetrate the housing 102 in a direction orthogonal to the optical axis L, for example.
- the headlamp light source 104 is a low beam light source, for example, a projector-type HID (High Intensity Discharge) bulb.
- the headlamp light source 104 is mounted at the center of the front surface of the housing 102 so as to protrude forward.
- the optical axis L of the light emitted from the headlamp light source 104 is set in parallel to the axle direction of the vehicle 100.
- the front end T of the headlamp light source 104 is a portion of the bulb unit that is located on the most front side of the vehicle.
- the headlamp light source 104 is not limited to an HID bulb, and may be an incandescent bulb, a halogen bulb, an LED (Light-Emitting-Diode) bulb, or the like.
- the headlamp light source 104 is not limited to a projector-type bulb, and may be a reflector-type bulb. Regardless of the type and method of the valve, the tip T of the valve is defined as the portion of the valve unit that is located closest to the vehicle front side.
- a headlamp may have a plurality of light sources for headlamps.
- a headlamp including a plurality of headlamp light sources it is sufficient that at least one headlight light source having the first ventilation member and the second ventilation member satisfying the relationship between the position and the air permeability described above is present.
- the first ventilation member and the second ventilation member satisfy the relationship between the position and the air permeability described above for all the headlamp light sources. In this case, when any headlight light source is turned on, it is possible to avoid an increase in the time until condensation is eliminated.
- the headlamp 201 shown in FIG. 4B includes a low-beam headlight light source 104A (first headlight light source) and a high-beam headlight light source 104B (second headlight light source). ing.
- the front end TB of the second headlamp light source 104B is located in front of the front end TA of the first headlamp light source 104A (above FIG. 4B), and the optical axis LB of the second headlamp light source 104B is: It is located on the inner side (right side in FIG. 4B) of the vehicle 100 in the vehicle width direction from the optical axis LA of the first headlamp light source 104A.
- the light source LA and the light source LB are parallel to each other.
- the first ventilation member 105 and the second ventilation member 106 satisfy the above-described relationship with any one of these headlight light sources 104A and 104B as a reference.
- the first lamp chamber portion 110A with which the first ventilation member 105 communicates in the lamp chamber 110 is located on the vehicle front side with respect to the first reference plane P1A for the first headlamp light source 104A.
- the first reference plane P1B for the second headlamp light source 104B that is, the first reference plane located closest to the front of the vehicle, and further on the front side of the vehicle
- the second reference plane P2B for the second headlamp light source 104B located on the inner side in the vehicle width direction than the second reference plane P2A, that is, the vehicle further than the second reference plane located on the innermost side in the vehicle width direction. It is located inside the width direction.
- the second lamp chamber portion 110B with which the second ventilation member 106 communicates in the lamp chamber 110 is a first position located on the vehicle rear side with respect to the first reference plane P1B for the second headlamp light source 104B.
- the first reference plane P1A for the headlamp light source 104A that is, the second reference for the second headlamp light source 104B, located further to the rear of the vehicle than the first reference plane located closest to the vehicle rear side.
- the second reference plane P2A for the first headlamp light source 104A located outside the plane P2B in the vehicle width direction that is, the second reference plane located most outside in the vehicle width direction, further in the vehicle width direction.
- the ventilation amount of the first ventilation member 105 is set to be larger than the ventilation amount of the second ventilation member 106.
- the headlamp further includes a position lamp light source (not shown) as a light source other than the headlamp light source 104.
- a position lamp light source (not shown) as a light source other than the headlamp light source 104.
- light sources other than the light source for headlamps are inferior in the effect of eliminating dew condensation because the emitted energy is small.
- the housing 102 can be formed of a synthetic resin such as PP (polypropylene).
- the housing 102 is usually sufficient if it is made of an opaque material.
- the translucent member 103 is a cover member that covers the front surface of the housing 102.
- the translucent member 103 is formed of a transparent synthetic resin having translucency such as PC (polycarbonate).
- An extension that partially partitions the lamp chamber may be disposed in the lamp chamber 110 surrounded by the housing 102 and the translucent member 103. However, the extension is arranged so that the first lamp chamber portion 110A and the second lamp chamber portion 110B communicate with each other.
- the first ventilation member 105 and the second ventilation member 106 are each provided with a waterproof ventilation film.
- the waterproof breathable membrane is arranged so that gas passing through the vent member passes.
- the waterproof gas-permeable membrane is not particularly limited in its structure and material as long as it allows gas permeation and prevents water permeation, but a resin porous membrane is suitable.
- a fluororesin porous body or a polyolefin porous body that can be manufactured by a known stretching method or extraction method can be used.
- the fluororesin include PTFE (polytetrafluoroethylene), polychlorotrifluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, and tetrafluoroethylene-ethylene copolymer.
- the monomer constituting the polyolefin include ethylene, propylene, 4-methylpentene-1,1 butene and the like.
- the polyolefin may be a polyolefin obtained by polymerizing or copolymerizing these monomers alone.
- the nanofiber film porous body etc. which used polyacrylonitrile, nylon, polylactic acid, etc. can also be used.
- the resin porous membrane a PTFE stretched porous membrane that has a small area, can ensure air permeability, and has a high function of preventing entry of foreign matters is preferable.
- the resin porous membrane may be used as a waterproof gas permeable membrane in the state of a laminate laminated with a reinforcing layer.
- the reinforcing layer is preferably more breathable than the porous resin membrane.
- the reinforcing layer is, for example, a woven fabric, a nonwoven fabric, a mesh, a net, a sponge, a foam, a porous body, or the like made of resin or metal.
- the resin porous membrane and the reinforcing layer can be joined by adhesive lamination, thermal lamination, heat welding, ultrasonic welding, adhesion with an adhesive, or the like.
- the first ventilation member 105 and the second ventilation member 106 include a waterproof ventilation film and a fixing member for fixing the waterproof ventilation film to the housing.
- An example of a preferable fixing member is a double-sided tape.
- a ventilation member using a double-sided tape can be obtained, for example, by joining a waterproof breathable membrane that is circular in plan view and a ring-shaped double-sided tape in plan view so that their outer peripheries coincide.
- FIGS. 6 and 7. A ventilation member 1 using a resin member is illustrated in FIGS. 6 and 7.
- the ventilation member 1 is provided on a neck portion 102 ⁇ / b> C protruding in a cylindrical shape from the back surface 102 ⁇ / b> A of the housing 102.
- An opening 102B of the housing 102A is formed at the tip of the neck 102C.
- the ventilation member 1 includes an inner member 2 and an outer member 3.
- the inner member 2 is a cylindrical tubular member that is attached to the neck portion 102C so that the inner peripheral portion thereof is in contact with the outer peripheral portion of the neck portion 102C. It has a hole 2A.
- the outer member 3 is a bottomed cylindrical member that is attached to the outer peripheral portion of the inner member 2, and is waterproof with the side wall portion 3 ⁇ / b> B that covers a part of the outer peripheral portion of the inner member 2 while being attached to the inner member 2. And a bottom 3 ⁇ / b> C that covers the gas permeable membrane 10.
- the outer member 3 is attached to the inner member 2 such that communication paths 8 and 9 are formed between the outer peripheral portion of the inner member 2 and the waterproof gas-permeable membrane 10.
- the communication paths 8 and 9 constitute a ventilation path 4 that communicates with the outside of the housing.
- the inner member 2 is made of, for example, an elastomer, more specifically, a thermoplastic or thermosetting elastomer.
- the inner member 2 includes a cylindrical tube body 2B having a through hole 2A, and four protrusions 2E that protrude from the center portion of the outer peripheral surface of the tube body 2B at equal intervals in the circumferential direction.
- the outer diameter of the portion where the protruding portion 2 ⁇ / b> E is formed is slightly larger than the inner diameter of the outer member 3.
- the outer member 3 is made of, for example, a resin, more specifically, a thermoplastic resin that is not an elastomer such as PP (polypropylene).
- Three base portions 3D are formed at equal intervals in the circumferential direction on the inner peripheral edge of the bottom 3C of the outer member 3.
- the base part 3 ⁇ / b> D is in contact with the inner member 2, thereby securing the communication path 8 between the bottom part 3 ⁇ / b> C and the waterproof gas-permeable membrane 10.
- Three engagement pieces 3E protrude inward and are formed at equal intervals on the inner peripheral edge of the opening 3A of the side wall 3B of the outer member 3.
- the engagement piece 3E engages with the end of the inner member 2 to prevent the outer member 3 from falling off.
- the ventilation area is an area of a region (aeration region) through which gas (air) can pass in a waterproof ventilation membrane that is a waterproof ventilation body.
- the ventilation area of the waterproof breathable membrane 10 of the ventilation member 1 is the area of the second opening 2D of the inner member 2 (the area defined by the inner diameter of the through hole 2A).
- the air-permeable area of the waterproof gas-permeable membrane 10 is such that the air flows along the cross-sectional direction (direction perpendicular to the main surface of the waterproof gas-permeable membrane 10) from the area of the main surface (gas inflow or outflow surface) of the waterproof gas-permeable membrane 10. It is obtained by subtracting the area of the region joined to the inner member 2 that cannot pass.
- the waterproof gas-permeable membrane 10 may have a plurality of ventilation regions. In this case, the total area of each ventilation region is handled as the ventilation area.
- Aeration rate of waterproof breathable material such as waterproof breathable film is not particularly limited, 0.010 to displays by the value measured by Frazier method 500cm 3 / cm 2 / sec, especially 0.030 ⁇ 300cm 3 / cm 2 / sec is preferred.
- the ventilation rate of the first ventilation member is preferably 0.5 to 220 cm 3 / sec, particularly preferably 0.5 to 133 cm 3 / sec. Further, the air flow rate of the second ventilation member is preferably 0.004 to 2.0 cm 3 / sec, particularly preferably 0.010 to 2.0 cm 3 / sec.
- the sum of the ventilation rate of the first ventilation member and the ventilation rate of the second ventilation member is 0.5 cm 3 / sec or more, more specifically 0.5 to 220 cm 3 / sec, and further 1.0 to 150 cm. 3 / sec is preferred. In particular, 2.0 to 120 cm 3 / sec is preferable.
- the ventilation rate of the ventilation member is determined by multiplying the measurement value (cm 3 / cm 2 / sec) by the Frazier method and the area (cm 2 ).
- the first ventilation member and the second ventilation member may each be composed of a plurality of members.
- the ventilation amount is calculated for each of the plurality of members (ventilation sub-members), and the sum of the ventilation amounts is defined as the ventilation amount of the first (second) ventilation member.
- the first ventilation member and the second ventilation member are composed of at least one ventilation (sub) member. Even in this case, the total ventilation amount of the first ventilation sub member constituting the first ventilation member is set to be larger than the total ventilation amount of the second ventilation sub member constituting the second ventilation member.
- an opening is formed only in a portion facing the first lamp chamber portion 110A or the second lamp chamber portion 110B (the portion facing the first lamp chamber portion 110A and the second lamp chamber portion 110B).
- the ventilation members 105 and 106 may be attached only to these openings, respectively.
- thermohygrometer A In the test, a headlamp 101 having the shape shown in FIGS. 1 and 2A was used.
- the second thermohygrometer B was disposed between the first thermohygrometer A and the third thermohygrometer C, that is, on the inner side surface of the central portion of the translucent member 103.
- the headlamp light source (bulb unit) 104 and the lamp socket connected thereto were removed from the opening (not shown) of the headlamp 101, and the lamp chamber 110 and the external space were communicated with each other at this opening.
- the lamp chamber 110 was dried by leaving the headlamp 101 in a constant temperature and humidity chamber (temperature 40 ° C., relative humidity 0%) for 2 hours. Subsequently, while maintaining the state in which the headlamp 101 is put in the constant temperature and humidity chamber, the temperature of the constant temperature and humidity chamber is adjusted to 40 ° C. and the relative humidity is set to 95%. Was introduced. After leaving, a bulb unit and a lamp socket were attached to the opening of the headlamp 101 in the constant temperature and humidity chamber to close the opening.
- a constant temperature and humidity chamber temperature 40 ° C., relative humidity 0%
- the headlamp 101 was taken out from the constant temperature and humidity chamber, set in a water injection test apparatus, and the water injection test apparatus was operated to spray 10 ° C. pure water over the entire headlamp 101 for 30 seconds. Condensation occurred on the inner surface of the translucent member 103 upon receiving water spray.
- the headlamp light source 104 which is a low beam light source, was turned on. While maintaining this state, the temperature and humidity in the lamp chamber 110 are measured by the first thermohygrometer A, the second thermohygrometer B, and the third thermohygrometer C, and the headlamp light source 104 is turned on. The time until the condensation that occurred on the inner surface of the translucent member 103 was eliminated was measured. Judgment of whether condensation was eliminated was performed by visual inspection from the outside of the translucent member 103. Further, the amount of water vapor was calculated from the measured temperature and humidity.
- a waterproof ventilation body may be a porous molded body of resin.
- a molded porous body of polybutylene terephthalate (PBT) resin is suitable.
- Examples 1-2, Comparative Examples 1-3 As the first ventilation member 105 and the second ventilation member 106 , cap seals (manufactured by Nitto Denko Corporation) having an airflow amount as shown in Table 1 were used. The structure of the cap seal is as shown in FIGS. In these ventilation members, a PTFE stretched porous membrane is used as a waterproof ventilation membrane. The time until condensation was eliminated was as shown in Table 1.
- FIG. 5 shows the relationship between the temperature measured for Comparative Example 2 and the amount of water vapor.
- the amount of water vapor increases with time at the position where the third thermohygrometer C is installed, and the ⁇ mark shown in FIG. 5 stays at a position above the saturated water vapor curve for a long time. It was.
- the temperature increased with time. It is considered that water vapor is supplied from the front part 103A of the translucent member 103 and flows rearward, and water vapor greatly exceeding the saturated water vapor amount appears in the vicinity of the rear part 103B.
- Comparative Examples 1 and 3 at the position where the third thermohygrometer C was installed, the amount of water vapor increased with time, and a phenomenon exceeding the amount of saturated water vapor was confirmed.
- the water vapor amount temporarily exceeded the saturated water vapor amount at all positions where the first to third thermohygrometers A to C were installed.
- Comparative Example 3 the amount of water vapor at the position where the third thermohygrometer C was installed did not increase significantly compared to Comparative Examples 1 and 2, and the amount of water vapor from the saturated water vapor amount was slight. It was.
- the amount of water vapor did not exceed the amount of saturated water vapor at the position where the third thermohygrometer C was installed.
- the vehicular lamp according to the present invention is useful as a lamp disposed at the front end portion of a vehicle represented by a headlamp and a fog lamp.
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- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
車両の前端部の側端に取り付けられる車両用灯具であって、
ハウジングと、
内部に灯室を形成するように前記ハウジングに装着された透光性部材と、
前記灯室内に配置され、前記透光性部材を通して光を前記車両の前方側へと出射する前照灯用光源と、
第1通気部材及び第2通気部材を備え、
前記前照灯用光源の光軸と直交し、かつ前記前照灯用光源の前記前方側の端部を通る平面を第1基準面、前記光軸を含み、かつ鉛直方向に沿って広がる平面を第2基準面、と定義したとき、
前記灯室は、前記第1基準面より前記前方側に位置し、かつ前記第2基準面より前記車両の車幅方向の内側に位置する第1灯室部と、前記第1基準面より前記車両の後方側に位置し、かつ前記第2基準面より前記車幅方向の外側に位置する第2灯室部と、を有し、
前記透光性部材は、前記第1基準面より前記前方側に位置すると共に前記第1灯室部に面する前方部から、前記第1基準面より前記後方側に位置すると共に前記第2灯室部に面する後方部に延び、
前記第1通気部材は、前記ハウジングにおける前記第1灯室部に面する部分に設けられた第1開口部に装着され、
前記第2通気部材は、前記ハウジングにおける前記第2灯室部に面する部分に設けられた第2開口部に装着され、
前記第1通気部材及び前記第2通気部材は、それぞれ防水通気体を備え、
日本工業規格(JIS) L1096に規定されている通気性測定法のA法(フラジール法)に準拠して測定した前記防水通気体の単位面積当たり通気量に、当該防水通気体における通気面積を乗じて通気量を定めたときに、
前記第1通気部材の前記通気量が前記第2通気部材の前記通気量よりも大きい、
車両用灯具、を提供する。
第1通気部材105及び第2通気部材106として、通気量が表1に示す値であるキャップシール(日東電工株式会社製)を用いた。キャップシールの構造は、図6及び図7に示したとおりである。これらの通気部材には、防水通気膜としていずれもPTFE延伸多孔質膜が用いられている。結露が解消するまでの時間は、表1に示したとおりとなった。
Claims (4)
- 車両の前端部の側端に取り付けられる車両用灯具であって、
ハウジングと、
内部に灯室を形成するように前記ハウジングに装着された透光性部材と、
前記灯室内に配置され、前記透光性部材を通して光を前記車両の前方側へと出射する前照灯用光源と、
第1通気部材及び第2通気部材を備え、
前記前照灯用光源の光軸と直交し、かつ前記前照灯用光源の前記前方側の端部を通る平面を第1基準面、前記光軸を含み、かつ鉛直方向に沿って広がる平面を第2基準面、と定義したとき、
前記灯室は、前記第1基準面より前記前方側に位置し、かつ前記第2基準面より前記車両の車幅方向の内側に位置する第1灯室部と、前記第1基準面より前記車両の後方側に位置し、かつ前記第2基準面より前記車幅方向の外側に位置する第2灯室部と、を有し、
前記透光性部材は、前記第1基準面より前記前方側に位置すると共に前記第1灯室部に面する前方部から、前記第1基準面より前記後方側に位置すると共に前記第2灯室部に面する後方部に延び、
前記第1通気部材は、前記ハウジングにおける前記第1灯室部に面する部分に設けられた第1開口部に装着され、
前記第2通気部材は、前記ハウジングにおける前記第2灯室部に面する部分に設けられた第2開口部に装着され、
前記第1通気部材及び前記第2通気部材は、それぞれ防水通気体を備え、
JIS L1096に規定されている通気性測定法のA法(フラジール法)に準拠して測定した前記防水通気体の単位面積当たり通気量に、当該防水通気体における通気面積を乗じて通気量を定めたときに、
前記第1通気部材の前記通気量が前記第2通気部材の前記通気量よりも大きい、
車両用灯具。 - 前記第1通気部材の前記通気量は、前記第2通気部材の前記通気量の2倍以上である、請求項1に記載の車両用灯具。
- 前記第1通気部材の前記通気量は、前記第2通気部材の前記通気量の10倍以上である、請求項2に記載の車両用灯具。
- 前記第1通気部材の前記通気量と前記第2通気部材の前記通気量との合計が0.5cm3/sec以上である、請求項1に記載の車両用灯具。
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US15/101,328 US10180230B2 (en) | 2013-12-04 | 2014-11-12 | Vehicle lamp |
EP14868645.4A EP3078900B1 (en) | 2013-12-04 | 2014-11-12 | Vehicle lamp |
CN201480066324.3A CN105814359B (zh) | 2013-12-04 | 2014-11-12 | 车辆用灯具 |
KR1020167017287A KR102152488B1 (ko) | 2013-12-04 | 2014-11-12 | 차량용 등기구 |
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EP (1) | EP3078900B1 (ja) |
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KR101728997B1 (ko) * | 2015-10-07 | 2017-04-21 | 현대모비스 주식회사 | 차량용 램프모듈의 환기장치 |
JP6823371B2 (ja) * | 2015-12-17 | 2021-02-03 | 日東電工株式会社 | 通気調湿ユニットおよび機器 |
KR101794997B1 (ko) | 2016-07-26 | 2017-11-08 | 현대오트론 주식회사 | 절연 게이트 드라이버 및 그를 포함하는 전력 소자 구동 시스템 |
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CN105814359A (zh) | 2016-07-27 |
EP3078900A4 (en) | 2018-01-03 |
US20160369971A1 (en) | 2016-12-22 |
JP2015109206A (ja) | 2015-06-11 |
KR20160095011A (ko) | 2016-08-10 |
EP3078900A1 (en) | 2016-10-12 |
KR102152488B1 (ko) | 2020-09-04 |
US10180230B2 (en) | 2019-01-15 |
CN105814359B (zh) | 2018-10-30 |
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JP6173195B2 (ja) | 2017-08-02 |
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