JP6425224B2 - Vehicle lamp - Google Patents

Description

  The present invention relates to a vehicular lamp having an aiming mechanism, and more particularly to an improvement of a heat dissipation structure thereof.

  Recently, a light source of a vehicular lamp is constituted by an optical semiconductor element such as a light emitting diode (LED) element or a laser diode (LD) element.

  In particular, a light emitting element such as an LED element or an LD element has a negative characteristic that the light emitting efficiency and the lifetime decrease due to heat generated by itself. In addition, the phosphor layer used for the purpose of whitening the emission color by combination with the light emitting element also has negative characteristics due to heat. Therefore, the temperature rise of the light emitting element and the phosphor layer is a problem, and a heat dissipation structure is required which raises the heat release efficiency of the light emitting element and the phosphor layer to make the light emitting element and the phosphor layer have an appropriate temperature or less.

  On the other hand, in the vehicle lamp, an aiming mechanism is provided to adjust the optical axis of the light emitting element in the movable range of 2.5 ° to 5 ° at the maximum in the vertical and horizontal directions in order to irradiate the road surface with a desired orientation. ing. Therefore, in the vehicle lamp, it is necessary to make the heat dissipation structure and the aiming mechanism compatible with each other to efficiently dissipate the light emitting element and the phosphor layer in a limited space.

  In a vehicle lamp having a first conventional aiming mechanism, the light emitting element is fixed to a metal bracket. The metal bracket is attached to the housing by the aiming mechanism for adjusting the light axis of the light emitting element, that is, the aiming bolt (screw) / nut for supporting point, aiming bolt (screw) / nut for vertical adjustment, and aiming bolt (screw) / nut for horizontal adjustment It is supported so as to be tiltable in the vertical and horizontal directions. In addition, the metal bracket is connected to the heat sink via a strip-like flexible heat pipe arranged in a lateral S-shape. Therefore, the heat generated in the light emitting element is dissipated to the outside of the lamp through the metal bracket, the flexible heat pipe and the heat sink. In this case, even if the metal bracket is tilted due to the adjustment of the aiming mechanism, the flexible heat pipe absorbs the fluctuation of the distance between the bracket and the heat sink due to the adjustment of the aiming mechanism due to its flexibility and the heat radiation performance is lowered. Suppress (see: Patent Document 1).

  In a vehicle lamp having a second conventional aiming mechanism, the light emitting element is fixed to a metal bracket. The metal bracket is tiltably supported on the housing by an aiming mechanism, ie, aiming bolt (screw) / flange, for adjusting the optical axis of the light emitting element. Further, as a heat dissipation structure, a heat pipe protruding from the inside of a metal bracket, a heat sink having a radiation fin, a first joint connected to the heat pipe and having a spherical convex portion and a spherical concave portion fitted, and a spherical convex A second joint unit in which the first joint unit and the spherical recess are fitted, a first intermediate joint member connecting the first joint unit and the second joint unit, and a second joint unit connecting the heat sink And two intermediate joint members. Therefore, the heat generated in the light emitting element passes through the metal bracket, the heat pipe, the first joint, the first intermediate joint member, the second joint, the second intermediate joint member, the heat sink, and the radiation fin. It is dissipated to the outside of the lamp. In this case, even if the metal bracket is tilted due to the adjustment of the aiming mechanism, the first and second intermediate joint members rotate via the first and second joints, and the bracket and the heat sink are adjusted by the adjustment of the aiming mechanism. To absorb the variation of the distance and to suppress the degradation of the heat radiation performance (see: Patent Document 2).

JP, 2007-35513, A (patent No. 4527024) JP, 2009-87733, A

  However, in the vehicle lamp having the above-described first conventional aiming mechanism, the flexible heat pipe is arranged in an S-shape, so that the flow of the working liquid contained in the flexible heat pipe is poor. There is a problem that the heat radiation effect is low. In addition, since the flexible heat pipe is band-like or flat, it is easy to absorb the variation in the distance between the bracket and the heat sink due to the tilting of the metal bracket due to the vertical adjustment of the aiming mechanism, but the horizontal adjustment of the aiming mechanism There is also a problem that it is difficult to absorb the variation of the distance between the bracket and the heat sink due to the tilting of the metal bracket due to the Further, since the fixing of the flexible heat pipe at both ends to the metal bracket and the heat sink is performed only by the heat conductive adhesive, the fixing portion of the flexible heat pipe is detached due to vibration, impact, etc. when the vehicle is traveling. As a result, there is also a problem that the heat dissipation structure can not be maintained.

  On the other hand, in the vehicle lamp having the above-mentioned second conventional aiming mechanism, only a part between the metal bracket and the heat sink is constituted by the heat pipe having high heat radiation efficiency, but the other part is connected Since it is comprised by the 1st, 2nd joint part and 1st, 2nd middle joint member in which heat resistance is large, the subject that heat dissipation efficiency is low occurs.

  In order to solve the above-described problems, a vehicle lamp according to the present invention includes a light emitting element, a metal base provided with the light emitting element, a pedestal provided on the housing, and a connection between the metal base and the pedestal The heat absorbing portion of the heat pipe is linearly inserted into the cylindrical hole of the heat pipe insertion portion of the metal base and acts as a rotation axis for aiming of the upper and lower adjustment of the light emitting element. The heat dissipating part is fitted into the pedestal.

  Furthermore, the pedestal has an annular groove, the heat radiating portion of the heat pipe has an annular shape, the heat radiating portion of the heat pipe is fitted in the annular groove of the pedestal, and the central axis of the annular groove of the pedestal is the light emitting element Acts as a rotation axis for left and right adjustment aiming. Alternatively, the pedestal comprises the fixed portion on the housing side and the movable portion on the opposite side of the housing, and one concentric recess of the fixed portion and the movable portion is fitted to the other concentric convex portion of the fixed portion and the movable portion The movable part has a rod-like groove on the opposite side of the fixed part, the heat dissipating part of the heat pipe has a linear shape, and the heat dissipating part of the heat pipe is fitted in the rod-like groove of the movable part The central axis of the concentric concave portion and the concentric convex portion of the pedestal functions as a rotation axis of the aiming of the left and right adjustment of the light emitting element.

  According to the present invention, since the metal base provided with the light emitting element and the housing are connected by the heat pipe and the pedestal having high heat dissipation efficiency, the heat dissipation efficiency is high. In addition, even if the metal base is tilted by adjusting the aiming mechanism, the heat pipe does not deform since the distance between the metal base and the housing does not change, so that the heat radiation performance of the heat pipe is not deteriorated. Furthermore, since one end of the heat pipe is inserted into the metal base and the other end of the heat pipe is fitted into the pedestal, the heat pipe is unlikely to be detached even by vibration, impact or the like when the vehicle is traveling.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partially notched lower left perspective view which shows 1st Embodiment of the vehicle lamp which concerns on this invention. FIG. 2 is a partially cut right perspective view of the vehicle lamp of FIG. 1; It is the front view which notched the vehicle lamp of FIG. The detail of the metal base of FIG. 1 is shown, (A) is a whole perspective view, (B) is a partial expansion perspective view, (C) is a whole perspective view after heat pipe insertion. The detail of the base of FIG. 1 is shown, (A) is a whole perspective view, (B) is a perspective view of a heat pipe which should be inserted, (C) is a whole perspective view after heat pipe insertion. It is a partially cutaway upper right perspective view showing a second embodiment of a vehicle lamp according to the present invention. It is a perspective view which shows the example of the heat sink of FIG. It is a partially notched upper right perspective view showing a third embodiment of a vehicle lamp according to the present invention. It is a perspective view which shows the 1st modification of the base of FIG. 1, Comprising: (A) shows before insertion of the thermal radiation part of a heat pipe, (B) shows after insertion of the thermal radiation part of a heat pipe. It is a perspective view which shows the 2nd modification of the base of FIG. 1, Comprising: (A) is a fixing | fixed part, (B) shows a movable part, (C) shows the fixed part and movable part which were connected. It is a partially notched lower right perspective view showing a fourth embodiment of a vehicular lamp according to the present invention. It is a perspective view which shows the detail of the heat pipe of FIG. 11, a base, and a heat sink. It is a partially notched upper right perspective view showing a fifth embodiment of a vehicle lamp according to the present invention. It is an expansion perspective view of a pedestal of FIG. It is a table | surface which shows the weight of the thermal radiation structure of the vehicle lamp of FIG.1, FIG.6, FIG.8 and FIG. It is a table | surface which shows the weight of the thermal radiation structure of the vehicle lamp of FIG. It is a partially cutaway right upper perspective view of the vehicle lamp as a comparative example.

  FIG. 1 is a partially cut away lower left perspective view showing a first embodiment of a vehicle lamp according to the present invention, FIG. 2 is a partially cut right perspective view of the vehicle lamp of FIG. 1, and FIG. It is the front view which notched the vehicle lamp of this.

  In FIG. 1, FIG. 2 and FIG. 3, in the housing comprising the outer lens 1 and the housing 2, an aiming bolt for supporting point 31a and nut 31b as an aiming mechanism, an aiming bolt 32a and nut 32b for vertical adjustment, and aiming for horizontal adjustment The bracket 4 made of metal or resin is fixed by the bolt 33a and the nut 33b. In this case, the aiming nuts 31b, 32b, 33b are freely rotatable nuts.

  Further, a metal base 6 for fixing the optical unit 5 is fixed to the bracket 4 by three screws 6 a.

  The optical unit 5 includes a light emitting element 51 such as an LED element or an LD element, a reflector 52, and an inner lens 53. The reflector 52 is fixed to the metal base 6 by bolts 52a. In addition, a fluorescent substance layer is provided on the light emitting element 51 as needed.

  The heat absorbing portion (evaporation portion) of the heat pipe 7 is inserted into the metal base 6, while the heat radiating portion (condensing portion) of the heat pipe 7 is fitted into the convex pedestal 8 provided on the housing 2 . Thus, the metal base 6, the heat pipe 7, and the pedestal 8 constitute a heat dissipation structure. That is, the heat generated in the light emitting element 51 is dissipated to the outside of the housing 2 through the metal base 6, the heat pipe 7 and the pedestal 8.

  The outer diameter of the heat pipe 7 is 6 mm, the container material is copper with high thermal conductivity, and the working fluid is ethanol. The heat pipe 7 is not formed into a strip or flat shape, and extends in the vertical direction and the lateral direction. In this case, the working fluid of the heat radiating portion of the pedestal 8 is configured to flow to the heat absorbing portion in the metal base 6 by gravity. There is. It should be noted that different outer diameters, different container materials, different working fluids may be used, and some of them may be specially processed to fit the lamp structure.

  The metal base 6 and the pedestal 8 are made of a material with good processability and good thermal conductivity, such as aluminum alloy A6063 having a thermal conductivity of 200 W / mK. In this case, the surface of the aluminum alloy is treated with black alumite (registered trademark) to increase the emissivity to, for example, 0.9 to 0.98. However, in order to reduce the contact thermal resistance between parts, the contact surface with the heat pipe 7 is mirror-finished to remove black alumite (registered trademark).

  The metal base 6 and the pedestal 8 may be metal other than the above-described aluminum alloy A 6063, metal such as copper, high thermal conductivity resin in which ceramic particles or metal filler is contained in resin for the purpose of weight reduction, or the like.

  4 shows details of the metal base 6 of FIG. 1, (A) is a general perspective view, (B) is a partial enlarged perspective view of (A), and (C) is a general perspective view after the heat pipe 7 is inserted. .

As shown in FIG. 4A, in the metal base 6, the support base portion 61 provided with the light emitting element 51, the reflector accommodating portion 62 provided with the reflector 52, and the linear heat absorbing portion 7a of the heat pipe 7 are inserted. And a heat pipe insertion portion 63. Heat pipe insertion portion 63 is disposed in the lateral direction, that the vehicle horizontal direction, as a result, acts as a rotation axis A _X of the top and bottom adjustment aiming mechanism will be described later. In the heat pipe insertion portion 63, a cylindrical hole 63a having the same diameter as the outer diameter 6 mm of the heat pipe 7 is opened. The minimum allowable diameter of the cylindrical hole 63a is larger than the maximum outer diameter of the heat pipe 7.

  As shown in FIG. 4B, the cylindrical hole 63a is provided with a concavo-convex structure, for example, a circumferential slit 63b to maintain the lubricity with the heat pipe 7. It is made to be filled with the sex material (TIM). Instead of the circumferential slit 63b, a plurality of spiral slits, a dot concavo-convex structure, or a concavo-convex structure in which these three types are combined may be used. Although not shown, the slit 63b may be provided not only on the cylindrical hole 63a but also on the heat pipe 7 side.

As shown in FIG. 4C, the heat absorption portion 7a of the heat pipe 7 is inserted after the cylindrical hole 63a of the heat pipe insertion portion 63 of the metal base 6 is filled with the heat conductive material (TIM). The heat pipe 7 may rotational movement relative to the metal base 6 a central axis of the cylindrical hole 63a of the heat pipe insertion portion 63 of the metal base 6 as the rotation axis A _X. In addition, a thixotropic material may be added to the thermally conductive material (TIM). For example, it may be filled with a silicone resin containing ceramic particles such as alumina, an epoxy resin or acrylic resin containing a fine silica powder, or a colloidal hydrous aluminum silicate or an organic complex. In the stationary state, the thixotropic material has no flowability, so the heat pipe 7 is in the stationary state. On the other hand, in the dynamic state, the thixotropic material flows to make the heat pipe 7 movable. Therefore, although the heat transfer loss of conduction by contact thermal resistance usually occurs between the metal base 6 and the heat pipe 7, the contact thermal resistance can be reduced by interposing the thixotropic material.

  5 shows details of the pedestal 8 of FIG. 1, (A) is a general perspective view, (B) is a perspective view of the heat pipe 7 to be inserted, and (C) is an overall perspective view after the heat pipe 7 is inserted. is there.

As shown in FIG. 5A, the pedestal 8 has a cylindrical shape in the vertical direction, that is, in the vertical direction of the vehicle, and its central axis acts as a rotation axis _AY of the aiming mechanism for horizontal adjustment described later. An annular groove 8 a having the same diameter as the outer diameter 6 mm of the heat pipe 7 is dug in the pedestal 8. The annular groove 8a is provided with a concavo-convex structure, for example, a concentric circumferential slit 8b, and is filled with a thermally conductive material (TIM) such as thermally conductive grease in order to maintain lubricity with the heat pipe 7. . In place of the concentric circular slits 8b, a plurality of spiral slits, a dot concavo-convex structure, or a concavo-convex structure in which these three types are combined may be used. Although not shown, the concentric circumferential slits 8b may be provided not only on the annular groove 8a but also on the heat pipe 7 side.

  The connection between the pedestal 8 and the housing 2 may be performed by using an adhesive, welding, screwing, or the like, or may be integrally formed with the housing 2.

  Further, a heat diffusion plate having an area larger than the bottom surface area of the pedestal 8 may be inserted between the pedestal 8 and the housing 2. The heat diffusion plate may be made of the same material as the pedestal 8 or may be a different member.

As shown in (B) of FIG. 5, the heat radiating portion 7 b of the heat pipe 7 has an annular shape in accordance with the annular groove 8 a of the pedestal 8. Thus, by the heat pipe 7 and annular, it is possible to increase the contact area with the base 8, thus, the amount the heat transfer from the heat pipe 7 to the seat 8 is increased. In this case, the middle diameter of the annular groove 8a of the pedestal 8, that is, the middle diameter of the heat radiating portion 7b of the heat pipe 7 is not damaged even if the heat pipe 7 is bent and the heat radiation performance of the heat pipe 7 is not deteriorated. To be selected. Further, although the transport section 7c between the heat absorbing section 7a and the heat radiating section 7b of the heat pipe 7 is vertical, it may not be vertical as long as the working fluid in the heat pipe 7 can move using gravity.

As shown in FIG. 5C, the heat absorbing portion 7b of the heat pipe 7 is fitted after the annular groove 8a of the pedestal 8 is filled with the thermally conductive material (TIM), and the heat pipe 7 is a circle of the pedestal 8 The central axis of the annular groove 8a can be rotated relative to the pedestal 8 with the axis of rotation _AY . Also in this case, a thixotropic material may be added to the thermally conductive material (TIM).

Referring back to FIG. 3, the rotation axis A _X of the heat pipe insertion portion 63 of the metal base 6 is positioned on a straight line passing the center of the aiming nut 31 b for fulcrum and the center of the aiming nut 33 b for left and right adjustment. The rotation axis A _Y is located on a straight line passing the center of the aiming nut 31b for the fulcrum and the center of the aiming nut 32b for vertical adjustment.

  The vertical aiming operation in FIGS. 1 to 3 will be described.

Metal base 6 by tightening the vertical adjustment aiming bolt 32a is rotated clockwise with respect to the rotation axis A _X when viewed from the left side of FIG. 1. As a result, the optical axis of the light emitting element 51 is adjusted downward. On the other hand, the metal base 6 by loosening the vertical adjustment aiming bolt 32a is rotated counterclockwise with respect to the rotation axis A _X when viewed from the left side of FIG. 1. As a result, the optical axis of the light emitting element 51 is adjusted upward. It can move within a range of up to ± 5 ° with respect to the rotation axis A _X.

  Next, the horizontal aiming operation in FIGS. 1 to 3 will be described.

By tightening the left and right adjusting aiming bolt 33a, the metal base 6 is rotated counterclockwise with respect to the rotation axis _{AY when} viewed from above in FIG. As a result, the optical axis of the light emitting element 51 is adjusted to the left. On the other hand, the metal base 6 is rotated clockwise with respect to the rotation axis _{AY when} viewed from above in FIG. 1 by loosening the aiming bolt 33a. As a result, the optical axis of the light emitting element 51 is adjusted to the right. It can move within a range of up to ± 5 ° with respect to the rotation axis _AY .

  According to the first embodiment of the vehicle lamp according to the present invention shown in FIGS. 1 to 5, the heat pipe 7 having high heat radiation efficiency and the space between the metal base 6 provided with the light emitting element 51 and the housing 2 Because the pedestal 8 is connected, the heat generated in the light emitting element 51 is dissipated to the outside of the housing 2 through the metal base 6, the heat pipe 7 and the pedestal 8. As a result, the heat dissipation efficiency is high. Further, even if the metal base 6 is tilted by adjustment of the aiming mechanism, the heat pipe 7 is not deformed because the distance between the metal base 6 and the housing 2 does not change, so that the heat radiation performance of the heat pipe 7 is lowered Absent. Furthermore, since one end of the heat pipe 7 is inserted into the metal base 6 and the other end of the heat pipe 7 is fitted into the pedestal 8, the heat pipe 7 is unlikely to be detached even by vibration, impact or the like during traveling of the vehicle.

  FIG. 6 is a partially cut away upper right perspective view showing a second embodiment of the vehicle lamp according to the present invention.

  In FIG. 6, a heat sink 9 is added to the components of FIG. The heat sink 9 is provided on the opposite side of the pedestal 8 of the housing 2. Thereby, the heat generated in the light emitting element 51 is dissipated through the metal base 6, the heat pipe 7, the pedestal 8, the housing 2 and the heat sink 9, and the heat dissipation performance is further improved. Also in this case, a heat diffusion plate may be provided between the pedestal 8 and the housing 2.

  The heat sink 9 is formed of resin as a part of the housing 2. Further, the heat sink 9 may be made of metal and insert-molded into the housing 2 only at its connection portion. Furthermore, as shown in FIG. 7, after being integrally molded with the pedestal 8, a sealing agent may be used to couple to the housing 2. As a result, the contact thermal resistance and the conductive thermal resistance decrease, and the heat dissipation performance is further improved.

  FIG. 8 is a partially cutaway right upper perspective view showing a third embodiment of the vehicle lamp according to the present invention.

  In FIG. 8, an internal heat sink 10 is added to the components of FIG. The internal heat sink 10 is provided on the metal base 6 in the housing. Thereby, the heat generated in the light emitting element 51 is also dissipated into the air in the housing, the thermal resistance between the light emitting element 51 and the air is reduced, and the heat dissipation performance of the entire lamp is further improved. In addition, when the ambient temperature of the lamp suddenly drops in winter or the like, the air in the lamp can be warmed to prevent condensation of the light emitting element 51, the electric circuit, and the like.

  FIG. 9 is a perspective view of a first modification of the pedestal 8 of FIG. 1, where (A) is the insertion of the heat radiating portion 7b of the heat pipe, and (B) is the fitting of the heat radiating portion 7b of the heat pipe 7; Show after.

  In the pedestal 8 'of FIG. 9, the pedestal 8 of FIG. 1 is hollow. As a result, the present invention can be applied to the complicated shape of the housing 2 and can reduce the weight of the heat dissipation structure. The pedestal 8 'of FIG. 9 can also be applied to the vehicle lamp of FIGS.

  FIG. 10 is a perspective view of a second modification of the pedestal 8 of FIG. 1, where (A) shows the fixed part, (B) shows the movable part, and (C) shows the fixed part and the movable part connected.

  The pedestal 8 ′ ′ of FIG. 10 is divided into a fixed portion 81 shown in FIG. 10A and a movable portion 82 shown in FIG. 10B. On the other hand, a second concentric convex portion (or concave portion) 82a corresponding to the first concentric concave portion 81a is provided on one surface of the movable portion 82, and the heat pipe 7 is provided on the other surface. A rod-like groove 82b into which the linear heat-radiating part 7b is fitted is provided The heat-conducting part of the heat pipe 7 is filled with a thermally conductive material (TIM) or a thixotropic material in the rod-like groove 82b of the movable part 82. Insert 7b.

As shown in FIG. 10C, the second concentric convex portion 82a of the movable portion 82 is fitted to the first concentric concave portion 81a of the fixed portion 81. In this case, too, the heat conductive material (TIM) or the thixotropic material is filled in advance. As described above, since the movable portion 82 is rotatable with respect to the fixed portion 81, the heat pipe 7 can rotationally move with the central axis of the pedestal 8 ′ ′ as the rotation axis _AY .

  According to the pedestal 8 ′ ′ of FIG. 10, the heat pipe 7 does not have to maintain the rotation axis, and the heat pipe 7 is easily processed. The pedestal 8 ′ ′ of FIG. 10 corresponds to the vehicle lamp of FIGS. It can be applied to

  FIG. 11 is a partially cut away lower right perspective view showing a fourth embodiment of the vehicle lamp according to the present invention.

  In FIG. 11, the heat pipe 11, the pedestal 12, and the heat sink 13 are added to the components of FIG. Thereby, the heat generated in the light emitting element 51 is dissipated to the outside of the housing 2 through the metal base 6, the heat pipe 7, the pedestal 8, the heat pipe 11, the pedestal 12 and the heat sink 13. Therefore, if the heat sink 13 is provided at a position where the traveling wind W strikes or a position where the ambient temperature is low, the heat radiation performance is further improved.

  FIG. 12 is a perspective view showing details of the heat pipe 11, the pedestal 12, and the heat sink 13 of FIG.

  As shown in FIG. 12, in the pedestal 8, the heat radiating portion 7b of the heat pipe 7 is configured not to collide with the heat absorbing portion 11a of the heat pipe 11 even if it rotates ± 5 ° to the left and right. That is, the heat radiating portion 7b of the heat pipe 7 is slightly shortened and fitted into the annular groove 8a of the pedestal 8, and the heat absorbing portion 11a of the heat pipe 11 is a rod shaped groove 82c of the pedestal 8 where the heat radiating portion 7b of the heat pipe 7 does not exist. It is embedded in the

  On the other hand, the heat radiating portion 7 b of the heat pipe 11 is fitted in the rod-like groove 12 a of the pedestal 12. Further, the transport section 11c of the heat pipe 11 is substantially horizontal, and the working liquid can easily flow.

  The rod-like groove 82c of the pedestal 8 and the rod-like groove 12a of the pedestal 12 are filled with a thermally conductive material (TIM) or a thixotropic material. Further, the heat sink 13 is formed of resin as a part of the housing 2. Further, the heat sink 13 may be made of metal and insert-molded into the housing 2 only at its connection portion. Furthermore, as shown in FIG. 12, after being integrally molded with the pedestal 12, it may be coupled to the housing 2 using a sealing agent. As a result, the contact thermal resistance and the conductive thermal resistance decrease, and the heat dissipation performance is further improved.

  FIG. 13 is a partially cut away upper right perspective view showing a fifth embodiment of the vehicle lamp according to the present invention.

  In FIG. 13, in the vehicle lamp of FIG. 1, the outer lens 1, the housing 2, the aiming mechanisms 31a / 31b, 32a / 32b, 33a / 33b, the bracket 4, the metal base 6, and the pedestal 8 are common, and two optical units Two heat pipes 7, 7 'corresponding to the optical units 5, 5' and the respective optical units 5, 5 'are provided. That is, the heat pipes 7 and 7 ′ are connected between the portion of the metal base 6 corresponding to the light emitting elements 51 and 51 ′ and the pedestal 8. The optical unit 5 'is composed of the same elements as the optical unit 5, that is, a light emitting element 51', a reflector 52 ', a bolt 52'a, and an inner lens (not shown).

In FIG. 13, the heat pipe insertion portion 63 of the metal base 6 into which the heat absorption portion 7a of the heat pipe 7 is inserted and the heat pipe insertion portion 63 'of the metal base 6 into which the heat absorption portion 7'a of the heat pipe 7' is inserted. Have a common central axis and are on the same rotational axis A _X. Therefore, when the metal base 6 is rotated with respect to the rotation axis A _X by the vertical adjusting aiming bolt 32a, the optical axis of the light emitting element 51, 51 'is adjusted only in the vertical direction the same amount at the same time.

  FIG. 14 is an enlarged perspective view of the pedestal 8 of FIG.

As shown in FIG. 14, the heat radiating portion 7 b of the heat pipe 7 and the heat radiating portion 7 ′ b of the heat pipe 7 ′ form a divided annular ring, and are fitted into the same annular groove 8 a having the common central axis of the pedestal 8. The heat radiating portions 7b and 7'b of the heat pipes 7 and 7 'have the same rotation axis _AY . Therefore, when the metal base 6 is rotated with respect to the rotation axis _AY by the aiming bolt 33a, the optical axes of the light emitting elements 51 and 51 'are simultaneously adjusted in the left and right direction by the same amount.

  In FIG. 14, the heat radiating portion 7 b of the heat pipe 7 and the heat radiating portion 7 ′ b of the heat pipe 7 ′ are fitted in the same annular groove 8 a having the common central axis of the pedestal 8. It may be fitted into an annular groove having a central axis and with two different diameters, or it may be fitted into an annular groove on different overlapping flat plates having a common central axis. Further, in FIG. 14, the pedestal 8 ′ of FIG. 9 and the pedestal 8 ′ ′ of FIG. 10 can also be applied.

  Furthermore, the vehicle lamp of FIGS. 13 and 14 can be applied to three or more optical units and three or more heat pipes.

FIG. 15 is a table showing the weight of the heat dissipation structure of the vehicle lamp of FIG. 1, FIG. 6, FIG. 8, and FIG. In FIG. 15, the weight was calculated under the following conditions.
Calorific value of light emitting element: 20 W
Housing (outer lens, housing) Size: 200 mm in length × 200 mm in width × 225 mm in height
Ambient temperature: 90 ° C
The weight of the heat dissipation structure excluding the metal base 6 was simulated so that the temperature of the light emitting element 51 was 160 ° C. In the case of the vehicle lamp of FIG. 1, the heat pipe 7 is 20 g and the pedestal 8 is 40 g. Therefore, the total weight of the heat dissipation structure is 60 g, which is very light. In the case of the vehicle lamp of FIG. 6, the heat pipe 7 is 20 g, the pedestal 8 is 40 g, and the heat sink 9 is 77 g. Therefore, the total weight of the heat dissipation structure is 137 g. In the case of the vehicle lamp of FIG. 8, the heat pipe 7 is 20 g, the pedestal 8 is 40 g, and the internal heat sink 10 is 120 g. Therefore, the total weight of the heat dissipation structure is 180 g. When the pedestal 8 'of FIG. 9 is applied to the vehicle lamp of FIG. 1, the weight of the pedestal 8' is reduced by 5 g from 40 g of the pedestal 8 in the vehicle lamp of FIG. Become lighter. When the pedestal 8 ′ ′ of FIG. 10 is applied to the vehicle lamp of FIG. 1, the total weight of the heat dissipation structure is the same as that of the vehicle lamp of FIG. 1. In the case of the vehicle lamp of FIG. Increase by 20g, increase by 30g of the base 12 smaller than the base 8, but the increase of the heat sink 13 is smaller than 60g and 77g of the heat sink 9 due to the cooling effect of the traveling wind W. Therefore, the total weight of the heat dissipation structure is about 170g. Incidentally, as a comparative example, as shown in FIG. 17, when one heat pipe 7 of 20 g is provided and connected to the internal heat sink of the case, although there is no pedestal, it is lightened, but the heat radiation performance is increased. In order to achieve this, the internal heat sink 101 is much heavier than the internal heat sink 10 of Fig. 8, for example 161 g, so the total weight of the heat dissipation structure is 181 g. Thus, for the vehicle of the invention Heat radiation structure of the sushi is light can be seen.

FIG. 16 is a table showing the weight of the heat dissipation structure of the vehicle lamp of FIG. In FIG. 16, the weight was calculated under the following conditions.
Calorific value of five light emitting elements: 10 W × 5 = 50 W
Housing (outer lens, housing) Size: 200 mm in length × 200 mm in width × 225 mm in height
Ambient temperature: 90 ° C
The weight of the heat dissipation structure excluding the metal base 6 was simulated so that the temperature of the light emitting element would be 160.degree. In the case of the vehicle lamp of FIG. 13, the heat pipes 7, 7 ′ are 20 g × 5 = 100 g, the base 8 is a little large at 140 g, and the internal heat sink (not shown) is 52 g × 5 = 260 g. Therefore, the total weight of the heat dissipation structure is 500 g. When five heat pipes 7 of 20 g are provided in the vehicle lamp of FIG. 17 and connected to the internal heat sink of the housing as a comparative example, the absence of a pedestal makes the internal heat sink lighter as shown in FIG. A little lighter than the internal heat sink 10, for example 5 times 102g, will be 510g, so the total weight of the heat dissipation structure will be 610g. Thus, it can be seen that the heat dissipation structure of the vehicular lamp of the present invention is light.

  The present invention can be applied to any modification of the obvious scope of the above-described embodiment.

  The vehicular lamp according to the present invention can be applied to a fog lamp and a DRL (Daytime Running Lamp) other than the headlight.

1: Outer lens 2: Housing 31a: fulcrum aiming bolt 31b: fulcrum aiming nut 32a: vertical adjustment aiming bolt 32b: vertical adjustment aiming nut 33a: horizontal adjustment aiming bolt 33b: horizontal adjustment aiming nut 4: bracket 5 , 5 ': optical unit 51, 51': light emitting element 52, 52 ': reflector 52a, 52'a: bolt 53: inner lens 6: metal base 61: support base 62: reflector housing 63: heat pipe insertion part 63a: cylindrical hole 63b: circumferential line slit 7, 7 ': heat pipe 7a: heat absorbing portion (evaporation portion)
7b: Heat dissipation unit (condensing unit)
7c: Transport parts 8, 8 ', 8'': pedestal 8a: annular groove 8b: concentric circumferential slit 8c: rod-like groove 81: fixed part 81a: first concentric concave part 82: movable part 82a: second concentric convex Portions 82b and 82c: Bar-like groove 9: Heat sink 10: Internal heat sink 11: Heat pipe 12: Base 12a: Bar-like groove 13: Heat sink

Claims (12)

A light emitting element,
A metal base provided with the light emitting element;
A pedestal provided in the housing,
A heat pipe connected between the metal base and the pedestal
Equipped with
The heat absorbing portion of the heat pipe is linearly inserted into the cylindrical hole of the heat pipe insertion portion of the metal base, and acts as a rotation axis for aiming the upper and lower adjustment of the light emitting element,
The heat radiating portion of the heat pipe is fitted into the pedestal,
The pedestal has an annular groove,
The heat radiating portion of the heat pipe has an annular shape,
The heat dissipating part of the heat pipe is fitted in the annular groove of the pedestal, and the central axis of the annular groove of the pedestal acts as a rotation axis of the aiming of the left and right adjustment of the light emitting element. A light emitting element,
A metal base provided with the light emitting element;
The pedestal,
A heat pipe connected between the metal base and the pedestal;
The pedestal includes a fixed portion attached to the housing and a movable portion attached to the heat pipe,
The fixing portion includes a first concentric recess or concentric protrusion.
The movable portion includes a rod-like groove and a second concentric convex portion or a concentric concave portion.
The movable portion is fitted by fitting the first concentric recess or the concentric protrusion with the second concentric protrusion or the concentric recess corresponding to the first concentric recess or the concentric protrusion in a pair. Be rotatable relative to the fixed part,
The heat absorbing portion of the heat pipe is linearly inserted into the cylindrical hole of the heat pipe inserting portion of the metal base, and acts as a rotation axis for aiming the upper and lower adjustment of the light emitting element,
The heat radiating portion of the heat pipe is formed in a straight line and is fitted into the rod-like groove of the movable portion.
A vehicular lamp in which a central axis of the first concentric concave portion or concentric convex portion and the second concentric convex portion or concentric concave portion acts as a rotation axis of aiming of the light emitting element in the left-right direction. further,
A bracket to which the metal base is fixed;
A fulcrum aiming bolt for fixing the bracket to the housing as a fulcrum and an aiming nut for the fulcrum;
An aiming bolt for vertical adjustment and an aiming nut for vertical adjustment for vertically adjusting the bracket with respect to the housing;
And an aiming bolt for adjusting left and right, and an aiming nut for adjusting left and right, for adjusting the bracket to the left and right with respect to the housing.
The rotation axis of the vertical adjustment aiming is positioned on a straight line connecting the center of the fulcrum aiming nut and the center of the horizontal adjustment aiming nut.
The vehicular lamp according to claim 1 or 2 axis of rotation of the left and right adjusting aiming is positioned on a straight line connecting the centers of said upper and lower adjustment aiming nut of the fulcrum for aiming nuts. The vehicle lamp according to claim 1 , wherein a concavo-convex structure is provided in a cylindrical hole of the heat pipe insertion portion or a portion of the heat pipe in contact with the cylindrical hole of the heat pipe insertion portion. The vehicular lamp according to claim 1 , wherein a concavo-convex structure is provided in a portion of the heat pipe which is in contact with the annular groove of the pedestal or in the heat pipe. The vehicle lamp according to claim 1 , wherein the annular groove of the pedestal is filled with a thermally conductive material or a thixotropic material. further,
The vehicle lamp according to claim 1 , further comprising a heat diffusion plate provided between the pedestal and the housing and having an area larger than a bottom area of the pedestal. further,
Another heat pipe having a linear heat absorbing portion fitted into the rod-like groove of the pedestal;
Another pedestal having a rod-like groove into which the linear heat radiating portion of the other heat pipe is fitted;
The vehicle lamp according to claim 1 , further comprising: a heat sink provided on the opposite side of the other pedestal of the housing. Multiple light emitting elements,
A metal base provided with the plurality of light emitting elements;
A pedestal provided in the housing,
A plurality of heat pipes connected between a portion of the metal base for each of the light emitting elements and the pedestal;
Equipped with
The heat absorbing portion of each of the heat pipes is linearly inserted into the cylindrical hole of the heat pipe inserting portion of the metal base, and acts as a common rotation axis for aiming the upper and lower adjustment of each light emitting element,
The heat radiating portion of each heat pipe is fitted into the pedestal,
The pedestal has an annular groove,
The heat radiating portion of each heat pipe has a divided annular shape,
The heat dissipating part of each heat pipe is a vehicular lamp in which a common central axis of the annular groove of the pedestal which is fitted into the annular groove of the pedestal acts as a rotation shaft of aiming of the left and right adjustment of each light emitting element. Multiple light emitting elements,
A metal base provided with the plurality of light emitting elements;
A pedestal provided in the housing,
A plurality of heat pipes connected between a portion of the metal base for each of the light emitting elements and the pedestal;
Equipped with
The heat absorbing portion of each of the heat pipes is linearly inserted into the cylindrical hole of the heat pipe inserting portion of the metal base, and acts as a common rotation axis for aiming the upper and lower adjustment of each light emitting element,
The heat radiating portion of each heat pipe is fitted into the pedestal,
The pedestal has a plurality of concentric ring grooves,
The heat dissipating part of each heat pipe has an annular shape with a plurality of different diameters,
The heat dissipating part of each of the heat pipes is fitted in each of the concentric ring grooves, and the common central axis of each of the concentric ring grooves of the pedestal functions as a rotation axis of the left and right adjustment aiming. Multiple light emitting elements,
A metal base provided with the plurality of light emitting elements;
A pedestal provided in the housing,
A plurality of heat pipes connected between a portion of the metal base for each of the light emitting elements and the pedestal;
Equipped with
The heat absorbing portion of each of the heat pipes is linearly inserted into the cylindrical hole of the heat pipe inserting portion of the metal base, and acts as a common rotation axis for aiming the upper and lower adjustment of each light emitting element,
The heat radiating portion of each heat pipe is fitted into the pedestal,
The pedestal comprises a plurality of flat plates having an annular groove,
The heat radiating portion of the heat pipe has an annular shape,
The heat radiating portion of each heat pipe is fitted in the annular groove of each flat plate of the base, and the common central axis of the annular groove of each flat plate of the base acts as a rotation axis of the aiming of the left and right adjustment Lights. further,
A bracket to which the metal base is fixed;
A fulcrum aiming bolt for fixing the bracket to the housing as a fulcrum and an aiming nut for the fulcrum;
An aiming bolt for vertical adjustment and an aiming nut for vertical adjustment for vertically adjusting the bracket with respect to the housing;
And an aiming bolt for adjusting left and right, and an aiming nut for adjusting left and right, for adjusting the bracket to the left and right with respect to the housing.
The common rotation axis of the vertical adjustment aiming is located on a straight line connecting the center of the fulcrum aiming nut and the center of the left and right adjustment aiming nut,
The vehicular lamp according to claim 9, 10 or 11 , wherein the common rotation axis of the left and right adjustment aiming is positioned on a straight line connecting the center of the fulcrum aiming nut and the center of the up and down adjustment aiming nut.

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