JP5082956B2 - Vehicle lamp structure - Google Patents

Description

  The present invention relates to a vehicle lamp structure such as a headlamp. In particular, the present invention relates to a structure that prevents injected water from entering a lamp chamber when high-pressure water is injected into a portion of a vehicle lamp.

The vehicle lamp is formed with a drain hole communicating with the outside from the lamp chamber in order to discharge the water that has entered the lamp chamber to the outside. By draining the water that has entered the lamp chamber through this drain hole, the lens can be prevented from fogging due to water droplets adhering to the lamp chamber, or the bulb can be prevented from being blown out due to water droplets adhering to the bulb. can do.
However, when the vehicle is washed or the like, the high-pressure water sprayed on the vehicle lamp part may be reflected by the vehicle or the like to reach the drain hole and enter the lamp chamber from the drain hole. Therefore, a vehicular lamp structure that can prevent the injected high-pressure water from entering the lamp chamber has been invented (see, for example, Patent Document 1 and Patent Document 2).

  In the lamp structure disclosed in Patent Document 1, the groove portion and the groove outer wall portion of the lamp housing are covered with the lens cover portion, and there is a gap between the groove outer wall portion of the lamp housing and the lens cover portion. It is in a state facing the back side. The drain hole is formed by cutting out a part of the lens that enters the groove of the lamp housing. Even if water is sprayed from the front to the vicinity of the lamp and enters the gap in the outer periphery of the lens, the water hits the cover of the lens, and the momentum of the water is weakened. Accordingly, water does not enter the gap between the groove outer wall portion of the lamp housing and the lens cover portion.

  Further, the lamp structure disclosed in Patent Document 2 has a structure in which an annular flange provided around the lens is fitted in a rim formed in an annular groove shape on the peripheral edge of the housing. Yes. The rim has a drain opening, a stepped portion, and the like on the side surface of the lower side. Further, a guide plate extending obliquely downward and rearward is integrally extended on the rear surface of the lower side of the rim. When water is sprayed from the front side to the vicinity of the lamp, the guide plate guides the water downward, and the stepped portion blocks the inflow. Therefore, it is possible to prevent water from entering the lamp chamber.

Japanese Patent No. 3690957 Japanese Patent No. 3330737

  However, the lamp structure described above has a problem that the cost of manufacturing the vehicle lamp increases because the structure is complicated. Moreover, it does not have a structure that takes into account the gas that enters and exits between the lamp chamber and the outside. That is, by turning on and off the bulb in the lamp chamber, the room temperature in the lamp chamber rises and falls. For example, when the lamp is turned off, the room temperature in the lamp chamber starts to drop. Then, since the gas in the lamp chamber contracts, a negative pressure is generated in the lamp chamber, and the gas enters the lamp chamber from the outside through the drain hole.

At this time, water may enter the lamp chamber together with the gas. As a result, as described above, water droplets adhere to the lamp chamber and the lens becomes cloudy, or water droplets adhere to the bulb and cause the bulb to run out.
The present invention has been made in view of the above-described problems, and constitutes a vehicle lamp with a relatively simple structure and prevents water combined with gas from entering the lamp chamber. Objective.

The present invention provides a vehicle lamp in which a lamp chamber is formed by combining a lamp housing with a lens that covers the front opening of the lamp housing, and the outer periphery of the outer wall of the lens side opening in the lamp housing is oriented in the same direction as the lens side opening. A vehicular lamp structure in which an annular groove portion that is open is provided, and an annular flange portion formed on an outer peripheral edge portion of the lens is fitted into the annular groove portion of the lamp housing, The water drainage passage provided with an opening that opens downward from the bottom side of the groove portion is defined, and a gas-liquid separation chamber that communicates with the lamp chamber through the water drainage passage is provided integrally, and the gas-liquid separation chamber Is integrally formed from the outer peripheral edge of the lens and the peripheral wall that extends downward from the outer wall of the lamp housing and surrounds the periphery of the opening. Characterized in that the the Activity said opening is constituted by a waterproof wall covering from below.

The opening is formed by a cylindrical portion protruding downward.
Further, the water drainage passage is inserted into a projection formed on the outer peripheral edge of the lens, and is partitioned vertically, and a main water drainage passage located on the upper side and communicating the lamp chamber and the opening; A sub-drainage passage having a second opening is provided on the lower side.

  The gas-liquid separation chamber and the outside communicate with each other through a gap provided between the inner surface of the peripheral wall and the outer peripheral edge of the waterproof wall, and the gap extends over at least two sides of the outer peripheral edge of the waterproof wall. It is provided.

  The outer wall peripheral edge of the lens side opening at the lower part of the lamp housing extends to the vicinity of the inner surface of the lens so as to overlap the inner surface of the outer peripheral wall of the lens.

  According to the present invention, the drainage passage provided with an opening that opens downward from the bottom side of the annular groove is formed in the lower portion of the lamp housing, and the gas-liquid communicated with the lamp chamber via the drainage passage. A separation chamber was provided integrally. Therefore, by separating the gas and the liquid in the gas-liquid separation chamber, the separated water does not reach the drain passage and water can be efficiently prevented from entering the lamp chamber.

Further, for example, according to the present invention, the gas-liquid separation chamber extends downward from the outer wall portion of the lamp housing and surrounds the periphery of the opening portion, and extends integrally from the outer peripheral edge portion of the lens to lower the opening portion. Constructed with a waterproof wall covering from. Therefore, since the assembly and molding of the vehicle lamp can be facilitated, the vehicle lamp structure can be manufactured at low cost.
In addition, for example, according to the present invention, the opening is formed by a cylindrical portion protruding downward, so that water does not easily adhere to the opening, and entry into the lamp chamber can be prevented.

  Further, according to the present invention, for example, the drainage passage is divided into upper and lower portions by inserting protrusions formed on the outer peripheral edge of the lens, and is located on the upper side so as to communicate the lamp chamber and the opening. A drainage passage and a sub-drainage passage provided on the lower side and provided with a second opening were provided. Therefore, even when the opening is blocked by water, the lamp chamber and the outside communicate with each other through the auxiliary drainage passage, so that even if a pressure difference occurs between the lamp chamber and the outside. The water blocking the opening can be prevented from being sucked into the lamp chamber.

Hereinafter, preferred embodiments of a vehicle lamp structure according to the present invention will be described with reference to the drawings. In the present embodiment, a case where the vehicle lamp according to the present invention is applied to a scooter type motorcycle (hereinafter referred to as a motorcycle) will be described.
1 and 2 are diagrams showing an example of a configuration of a motorcycle to which the vehicle lamp according to the present embodiment is applied. FIG. 1 is a vehicle side view of a motorcycle. FIG. 2 is a front view of the motorcycle. Here, a schematic configuration of the motorcycle 1 will be described. The motorcycle 1 forms a skeleton of a vehicle body by a vehicle body frame. In the motorcycle 1, the appearance of the entire vehicle is adjusted by the front frame cover 2, the step cover 3, and the rear frame cover 4 covering the vehicle body frame.

  A front fork 11 extends below the front frame cover 2, and a front wheel 12 is supported by the front fork 11. The front fork 11 is covered with the front frame cover 2 and is rotatably supported by a head pipe (not shown) that constitutes a part of the vehicle body frame, and is connected to the handle bar 13 at the upper end thereof. Grips 14 a and 14 b are provided at both ends of the handle bar 13. Further, the periphery of the handle bar 13 is covered with a handle cover 15 except for the grips 14a and 14b provided at both ends. The handle cover 15 is formed of, for example, a synthetic resin so that the front is opened. A headlamp 16 according to the present invention (hereinafter referred to as a lamp 16) is fitted in a portion that opens to the front of the handle cover 15. Here, by rotating the handle bar 13 to the left and right, the handle cover 15, the ramp 16, the front fork 11 and the front wheel 12 all rotate to the left and right.

On the other hand, a rear frame (not shown) constituting a part of the vehicle body frame is disposed inside the rear frame cover 4. A power unit 17 is mounted on the rear frame, and a rear wheel 18 is supported by the rear frame (power unit 17). Here, the rear wheel 18 is configured to be driven when the power unit 17 is activated.
Further, a tail lamp 19 is provided behind the rear frame cover 4, and a seating seat 5 is provided above the rear frame cover 4.

Next, FIGS. 3 to 6 are diagrams showing an example of the configuration of the vehicle lamp according to the present invention. FIG. 3 is a front view of the lamp. FIG. 4 is a side view of the lamp. FIG. 5 is a bottom view of the lamp. FIG. 6 is a perspective view of the lamp as viewed obliquely from below.
The lamp 16 is formed so that its shape (in front view) matches the opening so as to be fitted into the opening of the handle cover 15 described above. Here, the lamp 16 includes a lamp housing 20 and a lens 40 attached to cover the front opening of the lamp housing 20, and a bulb 60 is mounted on the lamp housing 20.

Next, the lamp housing 20 will be described with reference to FIG. FIG. 7 is a perspective view of the lamp housing as viewed obliquely downward from the front. The lamp housing 20 is formed in a substantially hemispherical shape or a dome shape whose inner side is curved, and the outer side is formed in a shape matching the opening shape of the handle cover 15 described above. Here, the lamp housing 20 is formed of, for example, a synthetic resin.
The lamp housing 20 is provided with a lens side opening 21 that opens toward the side on which the lens 40 is attached. The inside of the lens side opening 21 has a substantially hemispherical space. A valve mounting portion 22 to which the valve 60 is attached is provided at the back of the space. The substantially hemispherical inner peripheral surface is formed with a reflection 23 that reflects light irradiated radially from the bulb 60 and directs the light forward.

  On the other hand, an outer wall portion 24 is provided outside the lamp housing 20 in the circumferential direction. Further, an outer edge portion 25 parallel to the outer wall portion 24 is provided on the proximal end side of the outer wall portion 24 in the circumferential direction. A space surrounded by the outer wall portion 24 and the outer edge portion 25 is formed as an annular groove portion 26 into which an annular flange portion of a lens 40 described later is fitted. The annular groove 26 opens in the same direction as the lens side opening 21 described above so that the annular flange portion of the lens 40 is fitted from the front side. When the lens 40 is attached to the lamp housing 20, the outer edge portion 25 is provided with a plurality of locking portions 27 that are locked with locking portions of the lens 40 described later at appropriate intervals along the circumferential direction. Yes. Further, the outer edge portion 25 is provided with a plurality of attachment portions 35 corresponding to attachment portions (not shown) provided inside the opening of the handle cover 15.

Next, the lens 40 will be described with reference to FIG. FIG. 8 is a perspective view of the lens as viewed from the rear and obliquely upward. A lens surface 39 is formed on the lens 40. The lens surface 39 is curved so as to follow the curved shape of the handle cover 15 when the lamp 16 is attached to the handle cover 15.
The lens 40 is provided with a housing-side opening 41 that opens toward the side attached to the lamp housing 20.

  The lens 40 is provided with an outer wall portion 42 having an inner peripheral surface overlapping the outer peripheral surface of the outer wall portion 24 of the lamp housing 20 in the circumferential direction. Further, an annular flange portion 43 fitted into the annular groove portion 26 of the lamp housing 20 is provided in the outer peripheral edge portion of the outer wall portion 42 in the circumferential direction. Further, on the outside of the outer wall portion 42, when the lens 40 is attached to the lamp housing 20, the locked portion 44 that is locked with the locking portion 27 of the lamp housing 20 described above corresponds to the locking portion 27. Are provided.

  Next, the lamp 16 in which the lens 40 is attached to the lamp housing 20 will be described with reference to FIGS. 3, 4, 5, 6, 11, and 12. Here, when the lens 40 is attached to the lamp housing 20, the annular flange portion 43 of the lens 40 is fitted into the annular groove portion 26 of the lamp housing 20 from the front, so that each locking portion 27 provided on the lamp housing 20 is fixed to the lens. It is locked to the locked portion 44 provided at 40.

First, a cross section of a general part other than the water drain part 28 described later will be described with reference to FIG. FIG. 11 is a cross-sectional view showing the AA cross section of FIG. 3, and is a view showing a state where the annular flange portion of the lens is fitted in the annular groove portion of the lamp housing. In addition, the broken line shown in FIG.
As shown in FIG. 11, in a state where the lens 40 is attached to the lamp housing 20, the annular flange portion 43 of the lens 40 is fitted into the annular groove portion 26 of the lamp housing 20, and the outer wall portion 24 of the lamp housing 20. Is in contact with the inner peripheral surface of the outer wall portion 42 of the lens 40. Here, a space surrounded by the lamp housing 20 and the lens 40 is configured as a lamp chamber 50.

  In the state where the lens 40 is attached to the lamp housing 20, the peripheral edge of the outer wall portion 24 of the lamp housing 20 extends to the vicinity of the lens surface 39 of the lens 40 below the lamp housing 20. Therefore, the distance below the lamp 16 overlaps between the outer peripheral surface of the outer wall portion 24 of the lamp housing 20 and the inner peripheral surface of the outer wall portion 42 of the lens 40, and complicates the structure of the drainage portion 28 described later. be able to.

  Next, in the lamp structure of the present invention, a drainage passage having an opening opening downward from the bottom side of the annular groove is formed in the lower portion of the lamp housing 20, and the lamp chamber is formed via the drainage passage. A structure in which a gas-liquid separation chamber that communicates with each other is integrally provided will be described. First, a drainage portion 28 (a part 28a) for discharging water that has entered the lamp chamber is formed in the lower portion of the lamp housing 20. Here, the detail of the drain part 28a of the lamp housing 20 is demonstrated with reference to FIG.7, FIG.9 and FIG.10. FIG. 9 is a cross-sectional view showing a state immediately before the lens is attached to the lamp housing, and shows a portion of the drainage portion 28. FIG. 10 is a perspective view showing a state immediately before the lens is attached to the lamp housing.

  Two partition plates 29 are provided at a lower portion of the annular groove 26 and spaced apart from each other at a predetermined interval in a part of the annular groove 26. A drain passage 30 for draining water that has entered the lamp chamber 50 is formed by a passage formed by the two partition plates 29. Further, an opening 31 that opens downward is provided on the bottom side (rear side) of the drainage passage 30. The opening 31 is constituted by a cylindrical portion 32 that protrudes downward from the bottom side of the annular groove portion 26. Therefore, the water that has entered the lamp chamber 50 passes through the drain passage 30 and falls downward from the opening 31. Here, since the opening 31 is configured by the cylindrical portion 32, water hardly adheres to the opening 31, and even if it adheres, it immediately falls from the opening 31.

  A peripheral wall 33 extending downward from the outer wall 24 of the lamp housing 20 extends around the opening 31 so as to surround the opening 31. The peripheral wall 33 is formed in a U-shaped cross section with adjacent surfaces (33a to 33c) being substantially orthogonal to each other. Here, the space constituted by the outside of the opening 31 and the inside of the peripheral wall 33 is covered with a waterproof wall of the lens 40 described later when the lens 40 is attached to the lamp housing 20, so that a gas-liquid separation chamber is formed. Configure.

On the other hand, a drainage portion 28 (a part 28b) for discharging water that has entered the lamp chamber is formed at the lower portion of the lens 40. Here, the detail of the drain part 28b of the lens 40 is demonstrated with reference to FIG.8, FIG.9 and FIG.10.
A protrusion 45 inserted into a drainage passage 30 formed below the lamp housing 20 so as to extend rearward (from the lamp housing 20 side) from the outer peripheral edge to the lower portion of the outer peripheral edge of the outer wall 42. Is provided. Notches 46 are provided on both sides of the protrusion 45 to avoid interference with the partition plate 29 provided on the lamp housing 20 when the lens 40 is attached to the lamp housing 20 (FIG. 8).

  Further, a waterproof wall 47 is integrally provided at a lower portion of the outer peripheral edge portion of the outer wall portion 42 so as to protrude with an inclination slightly below the protruding direction of the protrusion 45 after being spaced downward from the outer peripheral edge portion. It has been. The waterproof wall 47 is configured to cover the opening 31 of the lamp housing 20 and a space formed by the outside of the opening 31 and the inside of the peripheral wall 33 when the lens 40 is attached to the lamp housing 20. Yes. At this time, the waterproof wall 47 protrudes so as not to contact any part of the lamp housing 20 such as the opening 31. Further, the size of the waterproof wall 47 is such that when the lens 40 is attached to the lamp housing 20, the outer peripheral edge of the waterproof wall 47 is spaced from the peripheral wall 33 (33 a to 33 c) of the lamp housing 20 (FIG. 5 etc. Reference) is formed. In addition, on both sides of the waterproof wall 47, guide portions 48 are erected along the side surface in the front-rear direction (see FIG. 8). Further, the proximal end side of the waterproof wall 47 is formed wider on both sides than the distal end side.

Next, a state in which the lens 40 is attached to the lamp housing 20 and the drainage portion 28 is configured will be described with reference to FIG. 12 is a cross-sectional view showing a BB cross section of FIG. 3.
As shown in FIG. 12, in the drainage portion 28, water that has entered the lamp chamber 50 passes between the outer peripheral surface of the outer wall portion 24 of the lamp housing 20 and the inner peripheral surface of the outer wall portion 42 of the lens 40. A gap is formed. A projection 45 of the lens 40 is inserted into the drain passage 30 of the lamp housing 20. The protrusion 45 is inserted at a position that divides the drainage passage 30 vertically. Here, the passage partitioned on the upper side of the drainage passage 30 is a main drainage passage 51, and the passage partitioned on the lower side is a sub drainage passage 52.

The main drainage passage 51 is slightly inclined downward toward the rear. The main water drain passage 51 allows the lamp chamber 50 and the opening 31 of the lamp housing 20 to communicate with each other. Therefore, most of the water that has entered the lamp chamber 50 passes through the main drain passage 51 and is then discharged from the opening 31 to the outside.
The sub drainage passage 52 is slightly inclined downward toward the front. In addition, a second opening 53 that opens downward is formed in front of the sub drainage passage 52 between the lower front portion of the drainage passage 30 and the base end portion of the waterproof wall 47.

  Further, the waterproof wall 47 of the lens 40 is positioned so as to cover the opening 31 of the lamp housing 20 and the space formed by the outside of the opening 31 and the inside of the peripheral wall 33 from below. Here, a space surrounded by the outside of the opening 31, the inside of the peripheral wall 33, and the waterproof wall 47 is configured as a gas-liquid separation chamber 54. The gas-liquid separation chamber 54 communicates with the lamp chamber 50 through the water drain passage 30, more specifically, the main water drain passage 51. Further, the gas-liquid separation chamber 54 is formed in a substantially U-shape when viewed from below as shown in FIG. Further, between the outer peripheral edge of the waterproof wall 47 and the three surfaces 33a to 33c of the peripheral wall 33, there is a discharge hole 55 formed in a substantially U-shape when viewed from below. Therefore, the water that has entered the lamp chamber 50 is finally discharged to the outside through the discharge hole 55 formed in a substantially U shape.

  Further, on the waterproof wall 47 of the lens 40, a third drainage passage 56 is formed in which water dropped from the opening 31 and the second opening 53 reaches the discharge hole 55. Note that the lamp 16 is configured to be adjustable by rotating the optical axis of the lamp 16 in the vertical direction (arrow shown in FIG. 11) in a state where the lamp 16 is attached to the handle cover 15. Here, even if the third drainage passage 56 is adjusted so that the optical axis of the lamp 16 is at the lowest limit, the water on the third drainage passage 56 can move backward, It is set to incline downward toward the rear.

  Next, the operation of the drainage portion 28 configured as described above will be described with reference to FIG. First, when high-pressure water is ejected from the front of the lamp 16 due to a car wash or the like, the opening 31 communicating with the lamp chamber 50 is lowered by a waterproof wall 47 protruding from the outer wall 42 of the lens 40 to the rear of the lamp 16. Since it is covered from the side, water is not sprayed onto the opening 31. Furthermore, since the opening 31 is provided with a gas-liquid separation chamber 54 surrounded by the inside of the peripheral wall 33, the outside of the opening 31, and the waterproof wall 47, the opening 31 reflects water from the rear to the opening 31. Even if the water is sprayed, the peripheral wall 33 or the gas-liquid separation chamber 54 blocks the sprayed water. Further, when the sprayed water enters the gas-liquid separation chamber 54, it adheres to the wall surface in the gas-liquid separation chamber 54 and then falls and is discharged from the discharge hole 55. Accordingly, the sprayed water does not reach the opening 31, and therefore can be prevented from entering the lamp chamber 50.

  Next, the action of the water draining portion 28 when the room temperature in the lamp chamber 50 is lowered by turning off the bulb 60 will be described. When the bulb is turned off from the on state, the room temperature in the lamp chamber 50 begins to drop. Then, since the gas in the lamp chamber 50 contracts, a negative pressure is generated in the lamp chamber 50, and the gas tries to enter the lamp chamber 50 from the outside. At this time, external gas passes through the gas-liquid separation chamber 54, the opening 31, and the main water drain passage 51 and is sucked into the lamp chamber 50. The external gas passes through the gas-liquid separation chamber 54, the third drain passage 56, the second opening 53, the sub drain passage 52, and the main drain passage 51 and is sucked into the lamp chamber 50. The

In the case where water is included in the gas to be sucked together, when the external gas and water enter the gas-liquid separation chamber 54, the gas and the liquid are separated in the gas-liquid separation chamber 54. More specifically, the gas fills the gas-liquid separation chamber 54 and the water adheres to the wall surface in the gas-liquid separation chamber 54. Accordingly, thereafter, only the gas passes through the main water drain passage 51 and is sucked into the lamp chamber 50. On the other hand, the water adhering to the wall surface in the gas-liquid separation chamber 54 falls and is discharged from the discharge hole 55.
In this way, since the gas-liquid separation chamber 54 separates the gas and the liquid, it is possible to prevent the water sucked together with the gas from entering the lamp chamber 50.

  Moreover, the case where water adheres to the lower side of the opening part 31 for some reason and has blocked the opening part 31 is assumed. At this time, if the bulb is turned off from the on state, the gas tends to enter the lamp chamber 50 from the outside, so that water attached to the lower side of the opening 31 may be sucked together with the gas. However, since the drainage portion 28 is provided with the auxiliary drainage passage 52 and the second opening portion 53, the gas sucked from the outside flows into the auxiliary drainage passage 52 and the second opening portion 53. Therefore, the water adhering to the opening 31 together with the gas can be prevented from entering the lamp chamber 50.

  In the unlikely event that water enters the lamp chamber 50, the water that has entered the lamp chamber 50 moves to the lower side of the lamp chamber 50. Next, water passes through a gap between the outer peripheral surface of the outer wall portion 24 of the lamp housing 20 and the inner peripheral surface of the outer wall portion 42 of the lens 40, and passes through the main water drain passage 51. Thereafter, the lamp chamber 50 falls from the lower side of the opening 31 to the third drainage passage 56 and is discharged to the outside through the discharge hole 55, whereby the drainage of the lamp chamber 50 is completed. Further, even if the lower side of the opening 31 is blocked due to any factor, the water that has passed through the main drainage passage 51 passes through the sub drainage passage 52 and passes through the second opening 53. From the lower side, it falls into the third drainage passage 56 and is discharged to the outside through the discharge hole 55.

  Further, as described above, the gas-liquid separation chamber 54 includes the peripheral wall 33 that surrounds the opening 31 and the waterproof wall 47 of the lens 40. Therefore, since the assembly and molding of the vehicle lamp can be facilitated, the structure of the vehicle lamp can be manufactured at low cost.

  In addition, in embodiment mentioned above, only the case where it has the discharge hole 55 formed in the substantially U shape seeing from the downward direction between the outer periphery of the waterproof wall 47 and the three surfaces 33a-33c of the surrounding wall 33 is demonstrated. However, the present invention is not limited to this case. The discharge hole 55 is preferably a gap that does not allow water to adhere due to surface tension. For example, the discharge hole 55 may be provided over at least two sides of the outer peripheral edge of the waterproof wall 47. Specifically, it may be provided over the peripheral walls 33a and 33b or over the peripheral walls 33b and 33c.

Moreover, although embodiment mentioned above demonstrated only the case where the vehicle lamp was applied to the small motorcycle, it is not restricted to this case. For example, you may use for vehicles, such as another motorcycle, a four-wheeled vehicle, and an electric vehicle.
In the embodiment described above, only the case where the vehicle lamp is applied to the headlamp has been described. However, the present invention is not limited to this case. For example, you may use for other lamps, such as a tail lamp.

1 is a side view of a motorcycle. 1 is a front view of a motorcycle. It is a front view of the lamp for vehicles concerning this embodiment. It is a side view of the lamp for vehicles concerning this embodiment. It is a bottom view of the lamp for vehicles concerning this embodiment. It is the perspective view which looked at the lamp | ramp which concerns on this embodiment from diagonally downward. It is the perspective view which looked at the lamp housing which concerns on this embodiment from diagonally downward. It is the perspective view which looked at the lens concerning this embodiment from the slanting upper direction. It is sectional drawing which shows the state just before a lens is attached to a lamp housing. It is a perspective view which shows the state just before a lens is attached to a lamp housing. It is sectional drawing which shows the AA cross section shown in FIG. It is sectional drawing which shows the BB cross section shown in FIG.

Explanation of symbols

16 lamp 20 lamp housing 24 outer wall portion 26 annular groove portion 30 drainage passage 31 opening 32 cylindrical portion 33 peripheral wall 40 lens 43 annular flange portion 45 protrusion 47 waterproof wall 50 lamp chamber 51 main drainage passage 52 sub drainage passage 53 first Second opening 54 Gas-liquid separation chamber 55 Discharge hole 56 Third drain passage 60 Valve

Claims (5)

In a vehicular lamp in which a lamp chamber is formed by combining a lamp housing with a lens that covers the front opening of the lamp housing, an annular shape that opens in the same direction as the lens side opening on the outer wall of the lens side opening in the lamp housing A vehicular lamp structure in which a groove portion is provided and an annular flange portion formed on an outer peripheral edge portion of the lens is fitted to the annular groove portion of the lamp housing;
A drainage passage having an opening that opens downward from the bottom side of the annular groove is defined in a lower portion of the lamp housing, and a gas-liquid separation chamber that communicates with the lamp chamber via the drainage passage. Provided in one ,
The gas-liquid separation chamber includes a peripheral wall that extends downward from an outer wall portion of the lamp housing and surrounds the periphery of the opening, and a waterproof wall that extends integrally from the outer peripheral edge of the lens and covers the opening from the lower side. vehicle lamp structure characterized by being configured in. The vehicular lamp structure according to claim 1 , wherein the opening is formed by a cylindrical portion protruding downward. The drainage passage includes a main drainage passage which is inserted into a projection formed on an outer peripheral edge portion of the lens and is vertically partitioned and communicates with the lamp chamber and the opening located on the upper side. the vehicle lamp structure of claim 1 or 2, and secondary water drain passage having a second opening located, characterized in that the provided. The gas-liquid separation chamber and the outside communicate with each other through a gap provided between the inner surface of the peripheral wall and the outer peripheral edge of the waterproof wall, and the gap extends over at least two sides of the outer peripheral edge of the waterproof wall. The vehicular lamp structure according to any one of claims 1 to 3 , wherein the vehicular lamp structure is provided. Outer wall periphery of the lens-side opening of the lower portion of the lamp housing, according to any one of claims 1 to 4, characterized in that overlaps the inner surface of the outer peripheral wall of the lens extending to near the inner surface of the lens Vehicle lamp structure.

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