Vehicle headlights

Abstract

To provide a vehicle headlight which can prevent clouding of a lens more effectively.SOLUTION: A headlight 1 of the invention includes a housing 11 and a lens 13, etc. The lens 13 is attached to the housing 11 to form a lamp chamber 27 between itself and the housing 11. A first vent hole 21 and a second vent hole 22 which are open to the rear are formed in the housing 11. The second vent hole 22 is disposed at a higher level than the first vent hole 21. In the lamp chamber 27, a first extension 31 serving as an inhibition part is provided. The first extension 31 inhibits air flowing from the second vent hole 22 into the lamp chamber 27 from circulating towards the lens 13. Further, the housing 11 is formed with a third vent hole 23 which is located between the second vent hole 22 and the first extension 31 and open to the upper side.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a vehicle headlight. [Background technology]

[0002] Patent Document 1 discloses a conventional vehicle headlight (hereinafter simply referred to as a headlight). This headlight is provided on a vehicle body and is arranged at the front of the vehicle body. The headlight includes a housing, a lens, a reflector, and a light source.

[0003] The housing is fixed to the vehicle body. An opening is provided in the housing. The lens is attached to the housing and covers the opening from the front. This forms a lamp chamber between the lens and the housing. A reflector is provided in the lamp chamber. The light source is attached to the reflector.

[0004] This headlight also has an extension in the lamp chamber. The extension is located between the lens and the reflector, and its upper part is adhered to the lens with a sealant. This allows the extension to cover the outer edge of the reflector from the lens side.

[0005] In this type of headlight, if moisture contained in the air inside the lamp chamber causes fogging on the lens from inside the lamp chamber, it can detract from the aesthetic appearance of the lens and, ultimately, the headlight. However, wiping away such fogging requires removing the lens from the housing, making it difficult to do so. In this headlight, the top of the extension and the lens are bonded together with a sealant, which seals the gap between the top of the extension and the lens inside the lamp chamber. This makes it difficult for air, which is heated by the light source and contains a lot of moisture, to flow between the extension and the lens. In this way, this headlight prevents fogging on the lens from inside the lamp chamber. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-193806 Summary of the Invention [Problem to be solved by the invention]

[0007] However, there is a demand for headlights that can more effectively prevent lens fogging. To address this, it has been considered to apply an anti-fog coating to the lens surface facing the lamp chamber in the conventional headlights. However, there is a limit to the effectiveness of such anti-fog coating in preventing lens fogging.

[0008] Another way to prevent fogging of the lens is to form a vent in the housing that communicates with the outside, and allow air to circulate between the lamp chamber and the outside of the housing through this vent, thereby preventing the air inside the lamp chamber from becoming trapped inside the lamp chamber. However, the vehicle body in which the headlamp is mounted has a power compartment that houses a power source such as an engine. Therefore, hot, humid air heated by the power compartment or the like can flow into the lamp chamber through the vent, and in such cases, fogging of the lens cannot be effectively prevented.

[0009] The present invention has been made in view of the above-mentioned conventional circumstances, and an object to be achieved is to provide a vehicle headlight that can more effectively prevent fogging of the lens. [Means for solving the problem]

[0010] The vehicle headlight of the present invention is provided on a vehicle body having a power compartment that houses a drive source, and is disposed forward of the power compartment, a housing having an opening and fixed to the vehicle body; a lens attached to the housing, covering the opening and forming a lamp chamber between the housing and the lens; provided in the lamp chamber, The lens has a generally bowl-shaped shape that faces the lens and curves backward from the lens. A reflector; Attached to the reflector and housed in the reflector. and a light source The housing is formed with a first ventilation port that opens toward the rear, and a second ventilation port that is disposed above the first ventilation port and also opens toward the rear, a suppression portion is provided in the lamp chamber to suppress the air that has flowed into the lamp chamber from the second ventilation port from flowing toward the lens; The housing further includes a third vent hole that is located between the second vent hole and the restricting portion and opens upward. 、 the housing has a rear wall located at a rear end of the housing and in which the first ventilation port and the second ventilation port are formed, and a peripheral wall connected to the rear wall, extending forward from the rear wall in a cylindrical shape, and in which the third ventilation port is formed, the third ventilation port is disposed above the second ventilation port, the lens is fixed to the peripheral wall on the opposite side from the rear wall; the suppression portion extends downward between the lens and the reflector while facing the lens from the peripheral wall, and covers a part of an outer edge portion of the reflector from the lens side, A gap is formed between the suppression portion and the reflector. It is characterized by the fact that

[0011] The headlight of the present invention is disposed forward of the power chamber on the vehicle body by fixing the housing to the vehicle body. Furthermore, in this headlight, the housing is formed with a first vent, a second vent, and a third vent, allowing air to convect between the lamp chamber and the outside of the housing through the first to third vents. Therefore, in this headlight, the lamp chamber is not sealed off from the outside of the housing, and air inside the lamp chamber is less likely to become trapped inside the lamp chamber.

[0012] Here, in the housing, the second vent is disposed higher than the first vent. Furthermore, the third vent is disposed higher than the second vent. The first and second vents open toward the rear of the housing. Therefore, low-temperature, low-humidity air outside the housing can easily flow into the lamp chamber through the first vent. In this way, the low-temperature, low-humidity air flowing in through the first vent circulates within the lamp chamber, dehumidifying the interior of the lamp chamber. This reduces the likelihood of fogging on the lens. The air that flows in through the first vent and circulates within the lamp chamber not only flows out of the housing through the first vent, but also rises within the lamp chamber when heated by a light source or the like within the lamp chamber, and flows out of the housing through the second and third vents.

[0013] On the other hand, high-temperature, high-humidity air heated in the power chamber is likely to flow into the lamp chamber through the second vent. In this regard, this headlight is provided with a suppression section inside the lamp chamber, which suppresses the air that has flowed into the lamp chamber through the second vent from flowing toward the lens. Therefore, in this headlight, air that has flowed into the lamp chamber through the second vent, including high-temperature, high-humidity air, is unlikely to flow toward the lens.

[0014] The high-temperature, high-humidity air in the lamp chamber then flows out of the housing through the second and third vents. In particular, the third vent is located between the second vent and the suppressing portion and opens upward. Therefore, the high-temperature, high-humidity air in the lamp chamber rises within the lamp chamber and efficiently flows out of the housing through the third vent.

[0015] Furthermore, in this headlight, even if the air inside the lamp chamber is heated by the heat of the emitted light source, this air rises inside the lamp chamber and is then suitably discharged to the outside of the housing through the third ventilation opening.

[0016] Therefore, the vehicle headlight of the present invention can effectively prevent the lens from fogging up.

[0017] The suppression section surrounding wall In this case, the number of parts of the headlight can be reduced. Also, since the suppression portion can be easily provided inside the lamp chamber, the assembly of the headlight can be simplified.

[0018] The suppression part is located on the outer edge of the reflector from the lens side. Part of Covering 。 this For , the suppression part prevents the outer edge of the reflector from the lens side Part of This effectively prevents the lens from fogging up while also improving the aesthetics of the headlight. [Effects of the Invention]

[0019] The vehicle headlight of the present invention can effectively prevent fogging of the lens. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view of a vehicle equipped with a headlight according to an embodiment. [Figure 2] FIG. 2 is a rear view of the headlight of the embodiment as seen from the engine room side. [Figure 3] FIG. 3 is a schematic cross-sectional view of the headlight of the embodiment, taken along line AA in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

[0022] As shown in FIG. 1 , a headlight 1 of the embodiment is used in a vehicle 100. Specifically, the vehicle 100 is a passenger automobile, and includes a vehicle body 101. The vehicle body 101 has an engine room ER, in which a well-known engine 103 and a battery 105 are housed. The engine 103 is an example of a "power source" in the present invention, and the engine room ER is an example of a "power room" in the present invention. Although detailed description will be omitted, the vehicle body 101 includes components necessary for the vehicle 100 to travel in addition to the engine 103, the engine room ER, etc.

[0023] In this embodiment, the front-rear direction, the up-down direction, and the left-right direction of the headlight 1 and the vehicle body 101 are defined by solid arrows shown in Fig. 1. In Fig. 2 and subsequent figures, the front-rear direction, the up-down direction, and the left-right direction are defined in accordance with Fig. 1. These front-rear direction, the up-down direction, and the left-right direction are perpendicular to each other.

[0024] The headlights 1 are configured as a pair on the left and right, and are respectively arranged on the left front and right front of the vehicle body 101. The configuration will be described below using the headlight 1 arranged on the left front of the vehicle body 101 as an example.

[0025] 2 and 3, the headlight 1 includes a housing 11, a lens 13, a reflector 15, and a bulb 17. The bulb 17 is an example of a "light source" in the present invention. Note that in FIG. 3, the shape of the headlight 1 is simplified for ease of explanation.

[0026] The housing 11 is made of resin. The housing 11 is composed of a rear wall 11a and a peripheral wall 11b. The rear wall 11a is located at the rear end of the housing 11. As shown in FIG. 2, the rear wall 11a is formed in a substantially rectangular shape extending in the up-down and left-right directions.

[0027] As shown in Fig. 3, the peripheral wall 11b is integral with the outer peripheral edge of the rear wall 11a and extends forward from the rear wall 11a. The rear wall 11a and the peripheral wall 11b form the housing 11 in a generally rectangular cylindrical shape with a bottom. As shown in Fig. 3, an opening 11c is provided at the front end of the housing 11.

[0028] A holding portion 111 is formed on the peripheral wall 11b. The holding portion 111 is located at the front end of the peripheral wall 11b and extends around the peripheral wall 11b in the circumferential direction. Furthermore, as shown in FIG. 2, a connector portion 112 is provided on the peripheral wall 11b. The connector portion 112 protrudes rightward from the peripheral wall 11b. The shapes of the holding portion 111 and the connector portion 112 can be designed as appropriate. The connector portion 112 may also be formed on the rear wall 11a.

[0029] Furthermore, the housing 11 is formed with a first ventilation opening 21, a second ventilation opening 22, and a third ventilation opening 23. As shown in FIG. 2, the first ventilation opening 21 and the second ventilation opening 22 are formed in the rear wall 11a. The first ventilation opening 21 is located in the lower left part of the rear wall 11a, and the second ventilation opening 22 is located in the upper right part of the rear wall 11a. In other words, the first ventilation opening 21 and the second ventilation opening 22 are spaced apart in the left-right direction. Furthermore, the second ventilation opening 22 is located higher than the first ventilation opening 21 in the rear wall 11a, and therefore in the housing 11.

[0030] On the other hand, the third ventilation opening 23 is formed in the peripheral wall 11b. Here, the third ventilation opening 23 is located in a position on the peripheral wall 11b that is approximately directly above the second ventilation opening 22. Thus, the third ventilation opening 23 is located at the uppermost position among the first to third ventilation openings 21 to 23. Note that the third ventilation opening 23 may be positioned offset in the left-right direction relative to the second ventilation opening 22, as long as it is located above the second ventilation opening 22.

[0031] As shown in Fig. 3, the first ventilation opening 21 and the second ventilation opening 22 protrude rearward from the rear wall 11a and open in the shape of a round hole. In other words, the first ventilation opening 21 and the second ventilation opening 22 penetrate the rear wall 11a in the front-to-rear direction. On the other hand, the third ventilation opening 23 opens upward in the shape of a round hole relative to the peripheral wall 11b. Furthermore, since the third ventilation opening 23 is formed in the peripheral wall 11b, it is located further forward than the first ventilation opening 21 and the second ventilation opening 22. Note that in Fig. 3, the first ventilation opening 21 is shown by a virtual line for ease of explanation. Furthermore, the shapes of the first to third ventilation openings 21 to 23 can be designed as appropriate.

[0032] The lens 13 is made of resin. The lens 13 has an outer surface 13a facing the front of the vehicle body 101 and an inner surface 13b located on the opposite side of the outer surface 13a. The lens 13 is colorless and transparent, and is translucent from the outer surface 13a to the inner surface 13b. Although not shown in the figure, the inner surface 13b is coated with an anti-fog coating to prevent the lens 13 from fogging up.

[0033] The lens 13 is disposed in front of the housing 11. The outer edge 131 of the lens 13 is inserted into the holding portion 111 of the peripheral wall 11b, and is adhered to the holding portion 111 by an adhesive 25 filled in the holding portion 111. In this way, the lens 13 is fixed to the housing 11 and covers the opening 11c from the front. The lens 13 may be formed of inorganic glass or the like.

[0034] In this way, lens 13 is fixed to housing 11, thereby forming a lamp chamber 27 between lens 13 and housing 11. Inner surface 13b of lens 13 faces the inside of lamp chamber 27. Here, adhesive 25 in holding portion 111 also serves as a seal for lamp chamber 27, preventing water, dust, etc. from entering lamp chamber 27 from the outside of housing 11 and lens 13. In addition, first to third ventilation holes 21 to 23 formed in housing 11 communicate between the inside of lamp chamber 27 and the outside of housing 11. Note that first to third ventilation holes 21 to 23 are each provided with a filter (not shown) that prevents water, dust, etc. from entering lamp chamber 27.

[0035] The reflector 15 is provided in the lamp chamber 27. The reflector 15 has a generally bowl-shaped configuration facing forward. The reflector 15 has an outer edge 15a located at the front end and an inner circumferential surface 15b that is continuous with the outer edge 15a. Although not shown in the figure, the inner circumferential surface 15b is plated. The shape of the reflector 15 can be designed as appropriate.

[0036] The bulb 17 is attached approximately in the center of the reflector 15. The bulb 17 is a commercially available halogen bulb. The bulb 17 is electrically connected to the connector portion 112 (see FIG. 2) of the housing 11 in the lamp chamber 27, and is capable of emitting light toward the lens 13 within the lamp chamber 27. At this time, the inner peripheral surface 15b of the reflector 15 is capable of reflecting the light from the bulb 17 forward.

[0037] Furthermore, in this headlight 1, a first extension 31 and a second extension 33 are provided inside the lamp chamber 27. The first extension 31 is an example of the "restraint portion" in the present invention.

[0038] The first extension 31 is formed integrally with the housing 11 and extends into the lamp chamber 27. More specifically, the first extension 31 is formed integrally with the holding portion 111 of the peripheral wall 11b and is located at an upper portion of the lamp chamber 27. The first extension 31 is located forward of the second ventilation port 22 and the third ventilation port 23 within the lamp chamber 27. The third ventilation port 23 is located forward of the second ventilation port 22. As a result, the third ventilation port 23 is located between the second ventilation port 22 and the first extension 31.

[0039] The first extension 31 is made up of a first extending portion 31a, a second extending portion 31b, and a third extending portion 31c. The first extending portion 31a is connected to the holding portion 111. The first extending portion 31a extends forward from the holding portion 111 along the upper portion of the lens 13.

[0040] The second extension portion 31b is connected to the front end of the first extension portion 31a. As the second extension portion 31b moves forward from the first extension portion 31a, it extends downward within the lamp chamber 27. The third extension portion 31c is connected to the lower end of the second extension portion 31b and is located between the lens 13 and the reflector 15. The third extension portion 31c extends downward within the lamp chamber 27 from between the lens 13 and the reflector 15 while following the front portion of the lens 13. Although not shown in detail, the front surfaces of the second extension portion 31b and the third extension portion 31c, i.e., the surfaces facing the lens 13 in the front-to-rear direction, are plated.

[0041] In the first extension 31, the second extending portion 31b and the third extending portion 31c are located in front of the second ventilation port 22 and overlap with the second ventilation port 22 in the front-to-rear direction. The third extending portion 31c is located in front of the outer edge portion 15a of the reflector 15, more specifically, in front of an upper outer edge portion 151 that is above the bulb 17 on the outer edge portion 15a, and overlaps with the upper outer edge portion 151 in the front-to-rear direction. A gap S is provided between the third extending portion 31c and the upper outer edge portion 151. The size of the gap S, that is, the distance in the front-to-rear direction between the third extending portion 31c and the upper outer edge portion 151, can be designed as appropriate.

[0042] In this way, the second extension portion 31b and the third extension portion 31c, and therefore the first extension 31, cover the second ventilation opening 22 and the upper outer edge portion 151 from the lens 13 side. Therefore, the first extension 31 makes the second ventilation opening 22 and the upper outer edge portion 151 invisible from the lens 13 side, i.e., the front side of the vehicle body 101.

[0043] The second extension 33 is formed integrally with the housing 11 and is located at a lower position within the lamp chamber 27. Although not shown in detail, the front surface of the second extension 33, i.e., the surface facing the lens 13 in the longitudinal direction, is also plated. The second extension 33 is located between the lens 13 and the reflector 15. More specifically, the second extension 33 is located in front of the lower outer edge portion 152, which is located below the bulb 17, on the outer edge portion 15a. As a result, the second extension 33 overlaps the lower outer edge portion 152 in the longitudinal direction and covers the lower outer edge portion 152 from the lens 13 side. Therefore, the lower outer edge portion 152 is hidden from view from the front side of the vehicle body 101 by the second extension 33. The shape of the second extension 33 can be designed as appropriate. The second extension 33 may be separate from the housing 11, or the second extension 33 may be omitted.

[0044] The headlight 1 is attached to the front of the vehicle body 101 by fixing the housing 11 to the vehicle body 101 with bolts (not shown). Thus, the headlight 1 is located in front of the engine compartment ER. Furthermore, the connector portion 112 of the headlight 1 is connected to the battery 105 (shown in FIG. 1) by a harness (not shown). In this way, power can be supplied from the battery 105 to the bulb 17.

[0045] As described above, in the headlight 1, the first ventilation opening 21 and the second ventilation opening 22 are formed in the rear wall 11a of the housing 11, and the third ventilation opening 23 is formed in the peripheral wall 11b. Therefore, by attaching the headlight 1 to the vehicle body 101 in front of the engine compartment ER, the first ventilation opening 21 and the second ventilation opening 22 are open toward the rear of the vehicle body 101, i.e., toward the engine compartment ER. On the other hand, the third ventilation opening 23 is open toward the top of the vehicle body 101.

[0046] In the headlight 1 configured as described above, the bulb 17 is illuminated to illuminate the area ahead of the vehicle body 101. In addition, in this headlight 1, the adhesive 25 that bonds the housing 11 and the lens 13 and the filters provided in the first to third air vents 21 to 23 prevent water, dust, and the like from entering the lamp chamber 27, but the first to third air vents 21 to 23 also connect the inside of the lamp chamber 27 to the outside of the housing 11. Therefore, air can circulate between the inside of the lamp chamber 27 and the outside of the housing 11 through the first to third air vents 21 to 23, so the inside of the lamp chamber 27 is not sealed, and air is less likely to become trapped inside the lamp chamber 27.

[0047] Here, among the first to third ventilation openings 21 to 23, the first ventilation opening 21 is located at the lowest position, and therefore, as shown by the dashed arrow in Fig. 3, low-temperature, low-humidity air can easily flow into the lamp chamber 27 through the first ventilation opening 21. Then, as this low-temperature, low-humidity air circulates within the lamp chamber 27, the inside of the lamp chamber 27 is dehumidified.

[0048] In particular, in this headlight 1, low-temperature, low-humidity air flows forward, passes between the peripheral wall 11b and the second extension 33, and flows within the lamp chamber 27 along the inner surface of the lens 13, making the lens 13 less likely to fog up. In addition, an anti-fog coating is applied to the inner surface 13b of the lens 13, and this anti-fog coating also makes the lens 13 less likely to fog up. The low-temperature, low-humidity air circulated within the lamp chamber 27 flows out of the housing 11 through the first ventilation port 21, as well as through the second and third ventilation ports 22 and 23.

[0049] On the other hand, the second and third vents 22 and 23 are located higher than the first vent 21. For this reason, high-temperature, high-humidity air, such as air heated by the engine 103, is more likely to flow into the lamp chamber 27 through the second vent 22 or the third vent 23 than through the first vent 21 (see the dashed-dotted arrows in FIG. 3 ). In particular, because the second vent 22 opens toward the rear of the vehicle body 101, the air heated by the engine 103 is more likely to flow into the lamp chamber 27 through the second vent 22.

[0050] Here, in this headlight 1, a first extension 31 is provided inside the lamp chamber 27. The second extension 31b and the third extension 31c of the first extension 31 are located in front of the second vent port 22 and overlap with the second vent port 22 in the front-to-rear direction. As a result, the second extension 31b and the third extension 31c function as a barrier that prevents air that has flowed into the lamp chamber 27 from the second vent port 22 from flowing toward the lens 13. In this way, the first extension 31 prevents air, including high-temperature and high-humidity air, that has flowed into the lamp chamber 27 from the second vent port 22 from flowing forward toward the lens 13. The first extension 31 also prevents air that has flowed into the lamp chamber 27 from the third vent port 23 from flowing forward toward the lens 13.

[0051] For this reason, in this headlight 1, even if high-temperature, high-humidity air warmed by the engine 103 flows into the lamp chamber 27 through the second vent 22 or the third vent 23, this high-temperature, high-humidity air is unlikely to flow through the lamp chamber 27 toward the lens 13. As a result, unlike low-temperature, low-humidity air, the high-temperature, high-humidity air is unlikely to circulate within the lamp chamber 27.

[0052] Then, this high-temperature, high-humidity air flows out of the housing 11 through the second vent port 22 and the third vent port 23. Here, the third vent port 23 is located between the second vent port 22 and the first extension 31, and opens toward the top of the vehicle body 101. Therefore, the high-temperature, high-humidity air in the lamp chamber 27 rises inside the lamp chamber 27, and is suitably discharged out of the housing 11 through the third vent port 23.

[0053] Furthermore, in this headlight 1, the heat from the emitting bulb 17 can warm the air in the lamp chamber 27. In this regard, in this headlight 1, when the air present between the reflector 15 and the lens 13 is heated by the heat from the bulb 17, this air rises within the lamp chamber 27, flows through the gap S between the third extension portion 31c and the upper outer edge portion 151, and flows out of the housing 11 through the second ventilation port 22 and the third ventilation port 23. Therefore, in this headlight 1, the lens 13 is less likely to fog up even with air heated by the heat from the emitting bulb 17.

[0054] Therefore, the headlight 1 of the embodiment can effectively prevent the lens 13 from fogging up.

[0055] In particular, in this headlight 1, the first extension 31 is formed integrally with the housing 11, which makes it possible to reduce the number of parts of the headlight 1. Furthermore, by eliminating the need for positioning when installing the first extension 31 inside the lamp chamber 27, the first extension 31 can be easily installed inside the lamp chamber 27. This also makes it easy to assemble the headlight 1.

[0056] Furthermore, the first extension 31 covers the second vent 22 and the upper outer edge 151 from the lens 13 side with the second extension 31b and the third extension 31c. The second extension 33 covers the lower outer edge 152 from the lens 13 side. In this way, in this headlight 1, the first extension 31 and the second extension 33 can hide the outer edge 15a of the reflector 15 from the front side of the vehicle body 101. Furthermore, since the front surfaces of the second extension 31b, the third extension 31c, and the second extension 33 are plated, when the headlight 1 is viewed from the front side of the vehicle body 101, the reflector 15 and the first and second extensions 31 and 33 create a good sense of unity. For these reasons, this headlight 1 also has a high aesthetic appearance.

[0057] Although the present invention has been described above with reference to the examples, it goes without saying that the present invention is not limited to the above examples and can be modified and applied as appropriate within the scope of the invention.

[0058] For example, in the embodiment, the first extension 31 is provided integrally with the housing 11. However, this is not limiting, and the first extension 31 and the housing 11 may be formed separately, and the first extension 31 may be fixed to the housing 11.

[0060] Further, other ventilation holes may be formed in the rear wall 11a of the housing 11 in addition to the first and second ventilation holes 21 and 22, and other ventilation holes may be formed in the peripheral wall 11b in addition to the third ventilation hole .

[0061] Furthermore, the anti-fogging coating on the inner surface 13b of the lens 13 may be omitted.

[0062] Moreover, instead of the bulb 17, an LED device or the like may be used as the "light source" in the present invention.

[0063] Furthermore, in the embodiment, the engine 103 is the "power source" of the present invention, but the power source is not limited to this, and may be a traction motor or the like. [Industrial Applicability]

[0064] The present invention can be used in vehicles such as transportation vehicles and industrial vehicles in addition to passenger cars. [Explanation of symbols]

[0065] 1...Headlight (vehicle headlight) 11. Housing 11c…Aperture 13...Lens 15...Reflector 15a...Outer edge 17...Bulb (light source) 21...First ventilation outlet 22...Second ventilation port 23...Third ventilation port 27...Lamp room 31...First extension (restraint part) 101...Car body 103...Engine (power source) ER...Engine room (power room)

Claims

1. A vehicle headlight is provided on a vehicle body having a power compartment that houses a drive source, and is disposed forward of the power compartment, a housing having an opening and fixed to the vehicle body; a lens attached to the housing, covering the opening and forming a lamp chamber between the housing and the lens; a reflector provided in the lamp chamber, facing the lens and curved rearward from the lens, and having a substantially bowl-like shape; a light source attached to and contained within the reflector; The housing is formed with a first ventilation port that opens toward the rear, and a second ventilation port that is disposed above the first ventilation port and also opens toward the rear, a suppression portion is provided in the lamp chamber to suppress the air that has flowed into the lamp chamber from the second ventilation port from flowing toward the lens; The housing further includes a third vent hole that is located between the second vent hole and the restricting portion and opens upward, the housing has a rear wall located at a rear end of the housing and in which the first air vent and the second air vent are formed, and a peripheral wall connected to the rear wall, extending forward from the rear wall in a cylindrical shape, and in which the third air vent is formed, the third ventilation port is disposed above the second ventilation port, the lens is fixed to the peripheral wall on the opposite side from the rear wall; the suppression portion extends downward between the lens and the reflector while facing the lens from the peripheral wall, and covers a part of an outer edge portion of the reflector from the lens side, The vehicle headlight, wherein a gap is formed between the suppression portion and the reflector.

2. 2. The vehicle headlight according to claim 1, wherein the suppression portion is integrally formed with the peripheral wall.

3. The suppression portion has a first extension portion connected to the peripheral wall and extending toward the lens, a second extension portion connected to the first extension portion and extending at an incline downward toward the reflector as it moves away forward from the first extension portion, and a third extension portion connected to the second extension portion and located between the lens and the reflector, The vehicle headlight according to claim 1 or 2, wherein the second extension portion and the third extension portion cover the second vent and a part of the outer edge portion from the lens side.

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