JP6619098B2 - Heat dissipation structure for vehicle lights - Google Patents

Description

  The present invention relates to a heat dissipation structure for a vehicle light in a vehicle such as a motorcycle.

  For example, Patent Document 1 discloses a heat dissipation structure for a vehicle light that can dissipate heat from a light source by a concave heat sink fixed to a reflector. Such a conventional heat dissipation structure for a vehicle light is applied to, for example, a tail lamp of an automobile, and a light source is an LED. When the lamp body and the housing are sealed by a heat sink, water, mud, etc. are contained in the lamp body. It was configured to prevent foreign objects from entering.

Japanese Patent No. 4856901

  However, in the conventional heat dissipation structure for a vehicle light described above, since the lamp body and the housing are hermetically sealed by the heat sink, the air around the light source continues to accumulate inside the lamp body, resulting in poor heat dissipation efficiency. There was a problem that it was enough. Such a problem is not limited to the tail lamp of an automobile, but also has the same problem when applied to a heat dissipation structure for lights (in addition to tail lamps, headlights, etc.) in other vehicles such as motorcycles.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a heat dissipation structure for a vehicle light capable of obtaining sufficient heat dissipation efficiency while reliably preventing entry of foreign matters from the outside.

  The invention according to claim 1 is a housing to which a light source is attached, a standing wall protruding at a position surrounding the light source mounting portion at the rear of the housing, and a socket cover attached to cover the standing wall. A heat radiation space for a light source is formed inside the standing wall and the socket cover, and a ventilation hole is formed in the standing wall to open the heat radiation space to the outside.

  According to a second aspect of the present invention, in the heat dissipation structure for a vehicle light according to the first aspect, the upright wall includes an inner upright wall that protrudes at a position near a mounting portion of the light source, and the inner upright wall. And an outer standing wall protruding from the outside, and the heat dissipation space is formed by the inner standing wall, the outer standing wall and the socket cover.

  According to a third aspect of the present invention, in the heat dissipation structure for a vehicle light according to the second aspect, the vent hole is formed in each of the inner standing wall and the outer standing wall, and the vent hole of the inner standing wall and the The vent hole of the outer standing wall is characterized in that the direction of opening the heat radiation space when viewed from above does not overlap each other.

  According to a fourth aspect of the present invention, in the vehicle light radiating structure according to the second or third aspect, the vent hole of the inner standing wall and the vent hole of the outer standing wall are arranged from the center of the mounting portion of the light source to the vehicle. It is formed so as to be positioned above a line drawn in the left-right direction.

  According to a fifth aspect of the present invention, in the heat dissipation structure for a vehicle light according to any one of the second to fourth aspects, the inner standing wall and the outer standing wall are respectively formed from a wall portion that protrudes in a cylindrical shape. And one vent hole is formed on the left side of the line drawn from the center of the cylinder in the vertical direction of the vehicle, and the other vent hole is formed to be positioned on the right side of the line drawn from the center of the cylinder in the vertical direction of the vehicle. It is characterized by that.

  According to a sixth aspect of the present invention, in the heat dissipation structure for a vehicle light according to any one of the first to fifth aspects, the vent hole of the upright wall is pulled in the lateral direction of the vehicle from the center of the mounting portion of the light source. It has the lower vent hole arrange | positioned in the position below the line.

  According to a seventh aspect of the present invention, in the heat dissipation structure for a vehicle light according to the sixth aspect, a water-impervious wall that prevents water from entering from the outside into the heat dissipation space below the lower vent hole. Is formed.

  According to an eighth aspect of the present invention, in the heat dissipation structure for a vehicle light according to any one of the first to seventh aspects, a conical heat sink is attached to the heat dissipation space.

  According to a ninth aspect of the present invention, in the heat dissipation structure for a vehicle light according to any one of the first to eighth aspects, the heat sink is sandwiched between the housing and the base of the light source, and the heat sink is The air holes are arranged so as to overlap the vent holes.

  According to the first aspect of the present invention, the heat dissipation space of the light source is formed inside the standing wall and the socket cover, and the standing wall is formed with a vent hole that opens the heat dissipation space to the outside. The warmed air can be discharged from the vent hole and ventilated, and sufficient heat radiation efficiency can be obtained while reliably preventing the entry of foreign matter from the outside.

  According to the invention of claim 2, the standing wall has an inner standing wall that is formed to project at a position near the light source mounting portion, and an outer standing wall that is formed to project outside the inner standing wall. Since the heat radiating space is formed by the inner standing wall, the outer standing wall and the socket cover, the heat radiating space has a double wall structure of the inner standing wall and the outer standing wall, so that foreign matter can be more reliably intruded from the outside. Can be prevented.

  According to the invention of claim 3, the inner standing wall and the outer standing wall are each formed with a vent hole, and the vent hole of the inner standing wall and the vent hole of the outer standing wall have a heat radiation space as viewed from above. Since the opening directions do not overlap each other, the air flowable passage has a labyrinth structure, and the labyrinth effect can reliably prevent the entry of foreign substances from the outside while maintaining the air ventilation function. it can.

  According to the invention of claim 4, the vent hole of the inner standing wall and the vent hole of the outer standing wall are formed so as to be located above the line drawn in the vehicle left-right direction from the center of the light source mounting portion. The air warmed by the heat generated by the light source flows upward and is discharged from the vent hole in that direction, and the warmed air can be smoothly flowed so that ventilation can be performed satisfactorily.

  According to the invention of claim 5, the inner standing wall and the outer standing wall are each formed of a wall portion protruding in a cylindrical shape, and one vent hole is provided on the left side of a line drawn in the vehicle vertical direction from the center of the cylinder. Since the other vent hole is formed on the right side of the line drawn from the center of the cylinder in the vertical direction of the vehicle, even if foreign matter enters one of the vent holes on the inner and outer standing walls, It is possible to make it difficult for the foreign matter to reach the other vent hole. Therefore, it is possible to more reliably prevent the entry of foreign matter from the outside while maintaining the air ventilation function.

  According to the sixth aspect of the present invention, the vent hole of the upright wall has the lower vent hole disposed at a position below the line drawn in the vehicle left-right direction from the center of the light source mounting portion. Even when foreign matter such as water or mud enters, it can be dropped and discharged from the lower vent by the dead weight of the foreign matter, so that foreign matter can be prevented from entering while maintaining the air ventilation function. It can be surely prevented.

  According to the seventh aspect of the present invention, since the water shielding wall that prevents water from entering the heat radiation space from the outside is formed below the lower ventilation hole, for example, it was discharged from the lower side during car washing. It is possible to prevent water from entering the vent hole.

  According to invention of Claim 8, since the conical heat sink was attached to the heat radiating space, it is possible to efficiently dissipate the heat by the heat sink, and the heat sink is expanded so that the diameter increases toward the rear. By attaching, workability at the time of maintaining the light source from the rear of the housing can be improved.

  According to the ninth aspect of the present invention, the heat sink is sandwiched between the housing and the base of the light source, and the heat sink is disposed so as to overlap the vent hole, thereby simplifying the mounting structure of the heat sink. In addition, the foreign matter that has entered from the vent hole is shielded by the heat sink, and further intrusion to the light source side can be prevented.

The side view which shows the motorcycle to which the thermal radiation structure of the vehicle light which concerns on embodiment of this invention is applied. Front view showing the motorcycle Front view showing a vehicle light in the same motorcycle Rear view showing the vehicle light of the same motorcycle Side view showing the vehicle light of the same motorcycle Sectional view taken along line VI-VI in FIG. Sectional drawing which shows the heat dissipation structure of the vehicle light of the same motorcycle The exploded perspective view which shows the heat dissipation structure of the vehicle light of the same motorcycle Schematic showing the action during ventilation in the heat dissipation structure of the vehicle light of the same motorcycle Schematic diagram showing the action when a foreign object enters in the heat dissipation structure of the vehicle light of the same motorcycle Schematic diagram showing the action of the impermeable wall in the heat dissipation structure of the vehicle light of the same motorcycle

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The heat dissipation structure for a vehicle light according to the present embodiment is applied to a scooter type motorcycle having a step floor as shown in FIGS. 1 and 2, and the motorcycle includes a front handle cover 1a and a rear handle cover. 1b, a front cover 2 covering the front of the vehicle, a front hood 3, a winker light 4 attached to the front cover 2 in a pair of left and right, a headlight 5, a pair of left and right rearview mirrors 6, and a pair of left and right handles 7, front brake lever 8a and rear brake lever 8b, front tire 9, front brake rotor and caliper 10, outer front fork 11, leg shield 12, floor panel 13, side stand 14, and main stand 15, belt converter cover 16, air A liner 17, a rear tire 18, a rear cushion 19, a front fender 20a and a rear fender 20b, a rear combination light 21, a rear grip 22, a seat 23, a center cover 24, a side cover 25, and an upper inner cover. 26a, a lower inner cover 26b, and an occupant step 27.

  In this embodiment, as shown in FIGS. 3 and 4, the headlight 5 is attached to the front cover 2, and the blinker light 4 is attached to the upper portion of the headlight 5 so as to overlap. The front cover 2 is attached so as to cover a front portion of a head pipe (not shown) of the vehicle, and the rear thereof is covered with an upper inner cover 26a and a lower inner cover 26b.

  As shown in FIGS. 3 and 4, the headlight 5 is configured such that a socket cover S <b> 2 is formed at the lower center of the housing H <b> 2, and a bulb B <b> 2 as a light source is covered and attached with the socket cover S <b> 2. The light from the bulb B2 passes through a lens G2 formed on the front side of the housing H2, and is irradiated to the front of the vehicle. A position lamp B3 that is covered and attached by the socket cover S3 is formed in the upper center portion H2a of the housing H2 according to the present embodiment, and the headlight 5 includes the position lamp B3. Yes.

  The blinker lights 4 are separately provided on the left and right sides of the headlight 5 and can be optionally blinked by a driver operating a blinker light switch (not shown). Specifically, as shown in FIGS. 3 and 4, the winker light 4 has a socket cover S1 formed at the center of each of the left and right housings H1, and the bulb B1 is covered with each socket cover S1. In addition, the light from the bulb B1 passes through a lens G1 formed on the front side of the housing H1 and is irradiated to the front of the vehicle.

  Here, in the heat dissipation structure of the headlight 5 according to the present embodiment, as shown in FIGS. 5 to 8, the housing H2 to which the bulb B2 (light source) is attached, and the attachment portion T of the bulb B2 at the rear of the housing H2 are provided. The upright walls (28a, 28b) that are formed to project at the enclosed positions, and the socket cover S2 that is attached to cover the upright walls (28a, 28b). The upright walls (28a, 28b) and the socket A heat radiation space W of the light source is formed inside the cover S2, and the standing walls (28a, 28b) are formed with vent holes (h1 to h4) that open the heat radiation space W to the outside.

  More specifically, the upright walls (28a, 28b) include an inner upright wall 28a formed to protrude rearward at a position near the attachment site T of the valve B2, and a rear side of the inner upright wall 28a. The outer standing wall 28b is formed so as to protrude toward the outer side, and a heat radiation space W of the light source is formed by the inner standing wall 28a and the outer standing wall 28b. As shown in FIGS. 8 and 9 to 11, the inner standing wall 28 a and the outer standing wall 28 b are each formed by a wall portion that is formed to project in a cylindrical shape, and a concentric projecting portion that is integrally formed with the housing H 2. Configured.

  Thus, the heat radiation space W is formed by a space formed behind the attachment portion T of the valve B2 in the housing H2, the side is covered with the inner standing wall 28a and the outer standing wall 28b, and the rear is the socket cover S2. Covered with The heat dissipation space W is opened to the outside by the vent holes (h1 to h4) formed in the inner standing wall 28a and the outer standing wall 28b, and the inside of the heat dissipation space W can be ventilated. It is possible to discharge foreign matter such as water and mud that has entered the water.

  As shown in FIGS. 8 and 9 to 11, the vent holes (h1 to h4) according to the present embodiment are formed from notches or spaced portions formed at predetermined positions on the inner standing wall 28a and the outer standing wall 28b. Thus, air and foreign matter can pass from the heat dissipation space W to the outside or from the outside to the heat dissipation space W. In the present embodiment, the inner standing wall 28a has a pair of vent holes (h1, h2), and the outer standing wall 28b has a pair of vent holes (h3, h4).

  Further, in the present embodiment, as shown in the figure, the vent hole h1 of the inner standing wall 28a and the vent hole h3 of the outer standing wall 28b are arranged in the lateral direction of the vehicle from the center C of the mounting portion T of the bulb B2 (light source). It is formed so as to be positioned above the drawn line L1. As a result, when the air heated by the heat generated by the bulb B2 (light source) reaches the heat dissipation space W, as shown in FIG. 9, the air flows toward the vent holes h1 and h3 located above and the vent holes h1 and h3. (See arrow (a) in the figure), the warmed air can be more smoothly flowed for better ventilation.

  Further, in the present embodiment, as shown in FIGS. 8 and 9 to 11, the vent hole h1 of the inner standing wall 28a and the vent hole h3 of the outer standing wall 28b are oriented to open the heat radiation space W as viewed from above. The positions are not overlapped with each other. As a result, a passage through which air can flow (a flow path extending from the attachment portion T of the valve B2 to the outside) becomes a labyrinth structure (maze structure), and by the labyrinth effect, foreign substances from the outside are maintained while maintaining the air ventilation function. Intrusion can be reliably prevented.

  In particular, in the present embodiment, the inner standing wall 28a and the outer standing wall 28b are each formed of a wall portion protruding in a cylindrical shape, and one of them is on the left side of the line L2 drawn from the cylinder center C in the vehicle vertical direction. The vent hole (the vent hole h3 formed in the outer standing wall 28b in the present embodiment) is formed, and the other vent hole (the vent hole h1 formed in the inner standing wall 28a in the present embodiment) is the cylinder center C. Are formed so as to be located on the right side of the line L2 drawn in the vehicle up-down direction.

  Thus, even when a foreign object enters one of the vent holes (in this embodiment, the vent hole h3) of the inner standing wall 28a and the outer standing wall 28b, as shown in FIG. In the present embodiment, it can be difficult to reach the vent hole h1), and as shown by the arrow (b) in FIG. Therefore, it is possible to more reliably prevent the entry of foreign matter from the outside while maintaining the air ventilation function.

  In particular, foreign matter (water, mud, etc.) entering from the left vent hole h3 of the outer standing wall 28b gets over the top of the inner standing wall 28a and reaches the right vent hole h1 (see arrow (c) in the figure). Therefore, in addition to the labyrinth effect, entry of foreign matter from the outside can be more reliably prevented. Note that foreign matter (water, mud, etc.) that has entered through the left vent hole h3 on the left side of the outer standing wall 28b usually falls downward due to its own weight and is discharged to the outside through the vent holes (h2, h4). The Rukoto.

  Furthermore, the vent holes (h2, h4) of the standing wall (that is, the vent hole h2 of the inner standing wall 28a and the vent hole h4 of the outer standing wall 28b) are arranged from the center C of the mounting portion T of the bulb B2 (light source) to the vehicle. It has lower vent holes (h2, h4) arranged at positions below the line L1 drawn in the left-right direction. That is, since the lower vent holes (h2, h4) are opened downward, as described above, foreign matter (water, mud, etc.) entering from the vent hole h3 on the left side of the outer standing wall 28b is the same figure. As shown by the middle arrow (b), it falls downward due to its own weight and is discharged to the outside through the lower vent holes (h2, h4).

  As a result, even if foreign matter such as water or mud enters from above the heat dissipation space W, it can be dropped and discharged from the lower vent holes (h2, h4) by the dead weight of the foreign matter. Intrusion of foreign matter from the outside can be more reliably prevented while maintaining the ventilation function. The ventilation hole h2 of the inner standing wall 28a and the ventilation hole h4 of the outer standing wall 28b can introduce external air into the heat radiation space W as shown by an arrow (a) in FIG. When the foreign matter is discharged, the foreign matter can be discharged to the outside as shown by an arrow (b) in FIG.

  In addition, in the present embodiment, a water shielding wall 28c that prevents water from entering the heat radiating space W from the outside is formed below the lower vent holes (h2, h4). As a result, as indicated by an arrow (d) in FIG. 11, for example, water released from below during car washing can be blocked, and entry into the lower ventilation holes (h2, h4) can be prevented. . Further, in the present embodiment, the impermeable wall 28d is formed on both the right and left sides of the impermeable wall 28c, and the water discharged from below is passed through as indicated by the arrow (e) in the figure. Intrusion into the pores (h2, h4) can be more reliably prevented. In addition, although the water-impervious walls (28c, 28d) according to the present embodiment are formed of a wall portion integrally formed at the rear of the housing H2, separate wall parts may be fixed. .

  On the other hand, as shown in FIGS. 7 and 8, a base 30 capable of energizing the valve H2 and a conical heat sink 29 are attached to an attachment portion T (attachment hole) of the valve B2 of the housing H2. Among these, the heat sink 29 is sandwiched between the housing H2 and the base 30 of the valve B2, and is fixed together with the base 30 by caulking near the attachment portion T of the housing H2. Further, the heat sink 29 is disposed so as to overlap with the ventilation holes (specifically, the ventilation holes (h1, h2) formed in the inner standing wall 28a). Further, the heat sink 29 is provided with a positioning receiving portion 29a, and can be positioned by fitting into the positioning portion 30a provided on the base 30.

  Thus, in the present embodiment, since the conical heat sink 29 is attached to the heat dissipation space W, the heat dissipation area can be increased, and the heat sink 29 can efficiently dissipate heat. By attaching the heat sink 29 so as to increase the diameter toward the rear, it is possible to improve workability when maintaining the bulb B2 (light source) from the rear of the housing H2. Further, the heat sink 29 is provided with a positioning receiving portion 29a and is positioned by being fitted to the positioning portion 30a provided on the base 30, so that the positioning operation can be simplified. Furthermore, the heat sink 29 is sandwiched between the housing H2 and the base 30 of the bulb B2 (light source), and the heat sink 29 is disposed so as to overlap the vent holes (h1, h2). The foreign matter that has entered through the vent holes (the vent holes (h3, h4) of the outer standing wall 28b) is shielded by the heat sink 29, and further to the bulb B2 (light source) side. Intrusion can be prevented.

  According to the above embodiment, the radiating space W is formed in the standing walls (28a, 28b) and the socket cover S2, and the standing walls (28a, 28b) are vent holes (opening the radiating space W to the outside). Since h1 to h4) are formed, the air heated by the heat generated by the bulb B2 (light source) can be discharged from the vent holes (h1 to h4) and ventilated, and the entry of foreign matter from outside can be surely prevented. In addition, sufficient heat dissipation efficiency can be obtained.

  In addition, the standing wall according to the present embodiment includes an inner standing wall 28a that is formed to project in the vicinity of the attachment site T of the valve B2, and an outer standing wall 28b that is formed to project outside the inner standing wall 28a. Since the heat dissipation space W of the bulb B (light source) is formed by the inner standing wall 28a, the outer standing wall 28b, and the socket cover S2, the heat radiation space W is a double wall of the inner standing wall 28a and the outer standing wall 28b. It has a structure and can more reliably prevent entry of foreign matter from the outside.

  Although the present embodiment has been described above, the present invention is not limited to this. For example, the heat dissipation structure for a vehicle light according to the above embodiment is added to the headlight 5 or together with the bulb B1 as a light source. You may make it apply to other vehicle lights, such as the blinker light 4 and the tail lamp of a vehicle. In the present embodiment, the upright walls (28a, 28b) are integrally formed on the rear side of the housing H2, but may be separate wall parts assembled on the rear side of the housing H2.

  Furthermore, in the present embodiment, the standing wall that is formed to protrude behind the housing H2 at a position surrounding the bulb T2 (light source) mounting portion T is composed of the inner standing wall 28a and the outer standing wall 28b. Further, it may be configured by a single standing wall formed at a position surrounding the attachment site T, or may be configured by three or more standing walls. Furthermore, the vent holes (h1 to h4) formed in the standing walls (28a, 28b) may be formed at arbitrary positions, and the number of the formed holes may be arbitrarily set. In addition, in this embodiment, although applied to the heat dissipation structure of the light of a motorcycle, you may apply to the heat dissipation structure of the light in other vehicles, such as a motor vehicle.

  As long as the heat dissipation structure for the vehicle light has a heat dissipation space for the light source inside the standing wall and the socket cover, and the ventilation wall has a vent hole that opens the heat dissipation space to the outside, the appearance shape will be different. Alternatively, the present invention can be applied to a device to which other functions are added.

DESCRIPTION OF SYMBOLS 1a Front handle cover 1b Rear handle cover 2 Front cover 3 Front hood 4 Winker light 5 Headlight 6 Rearview mirror 7 Handle 8 Brake lever 9 Front tire 10 Rotor and caliper 11 Outer front fork 12 Leg shield 13 Floor panel 14 Side stand 15 Main stand 16 Belt converter cover 17 Air cleaner 18 Rear tire 19 Rear cushion 20 Rear fender 21 Rear combination light 22 Rear grip 23 Seat 24 Center cover 25 Side cover 26 Inner cover 27 Passenger step 28 Standing wall 28a Inner standing wall 28b Outer standing wall 28c, 28d Impermeable wall 29 Heat sink 30 Base

Claims (8)

A housing to which a light source is attached;
An upright wall formed protruding at a position surrounding the light source mounting site behind the housing;
A socket cover attached over the upright wall;
Comprising a said with upright walls and the radiation space of the light source in the interior of the socket cover is formed, it said upstanding wall, said vent hole to open the radiator space to the outside is formed, and, in the heat dissipation space A heat dissipation structure for a vehicle light, characterized in that a conical heat sink whose diameter increases toward the rear is attached, and the heat sink is disposed so as to overlap the vent hole .   The upright wall includes an inner upright wall formed to project at a position in the vicinity of the mounting portion of the light source, and an outer upright wall formed to project out of the inner upright wall. The heat dissipation structure for a vehicle light according to claim 1, wherein the heat dissipation space is formed by a standing wall and a socket cover.   The vent hole is formed in each of the inner standing wall and the outer standing wall, and the vent hole of the inner standing wall and the vent hole of the outer standing wall are oriented to open the heat radiation space when viewed from above. 3. The heat dissipating structure for a vehicle light according to claim 2, wherein the heat dissipating structure is not overlapped with each other.   The vent hole of the inner standing wall and the vent hole of the outer standing wall are formed so as to be positioned above a line drawn in the vehicle left-right direction from the center of the light source mounting portion. Or the heat dissipation structure of the vehicle light of 3.   Each of the inner standing wall and the outer standing wall is formed by a wall projecting in a cylindrical shape, and one vent hole is formed on the left side of a line drawn in the vehicle vertical direction from the center of the cylinder, and the other vent hole is formed. The heat dissipation structure for a vehicle light according to any one of claims 2 to 4, wherein the heat dissipating structure for a vehicle light according to any one of claims 2 to 4 is formed so as to be located on the right side of a line drawn from the center of the cylinder in the vehicle vertical direction.   The ventilation hole of the said standing wall has a lower ventilation hole arrange | positioned in the position below the line pulled in the vehicle left-right direction from the center of the attachment site | part of the said light source, The any one of Claims 1-5 characterized by the above-mentioned. A heat dissipation structure for a vehicle light according to claim 1.   The heat-radiating structure for a vehicle light according to claim 6, wherein a water-impervious wall that prevents water from entering the heat-dissipating space from the outside is formed below the lower vent hole. The heat dissipation structure for a vehicle light according to any one of claims 1 to 7 , wherein the heat sink is sandwiched and disposed between the housing and a base of the light source.

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