JP2020004665A - Lamp unit - Google Patents

Abstract

To provide a lamp unit which can suppress the generation of the deformation of an optical member while stably attaching the optical member for controlling a light distribution of light from a light source to an attachment member.SOLUTION: A lamp unit comprises a first lens member 20, a heatsink 40 and a screw 51. The heatsink 40 has a first boss part 431 having a fastening hole 433, and a protrusion 44 which protrudes higher than a base end face 431a of the first boss part 431, and shorter than a tip face 431b of the first boss part 431 from an attachment face 41a. The first lens member 20 has an attachment part having a screw insertion hole 203 which is larger in diameter than the first boss part 431 and smaller in diameter than a head part 51a of the screw 51. The attachment part is sandwiched between the head part 51a of the screw 51 and the protrusion 44 of the heatsink 40, and held to the heatsink 40 by a reaction force of the elastically deformed attachment part.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a lamp unit.

  2. Description of the Related Art Conventionally, a technique regarding a lamp unit including a light source and an optical member having an optical component for controlling light distribution from the light source is known. For example, Patent Literature 1 describes an optical unit that fixes a reflector as an optical member to a heat sink via a base portion with screws.

JP 2012-59643 A

  However, when the optical member and the mounting member are firmly fixed by screwing, as in the structure described in Patent Literature 1, the movement of the optical member is restricted. For this reason, when the optical member tries to expand or contract (change in dimensions) due to thermal effects or the like, the optical member may be deformed.

  The present invention has been made in view of the above, and it is possible to suppress the occurrence of deformation of an optical member while stably attaching an optical member for controlling light distribution of light from a light source to a mounting member. It is an object to provide a simple lamp unit.

  In order to solve the above-described problems and achieve the object, the present invention provides a light source, an optical member having an optical component for controlling light distribution of light from the light source, and a mounting surface having a mounting surface to which the optical member is mounted. A member, and a fastener for attaching the optical member to the attachment member, wherein the attachment member has a fastening hole in which the fastener is fastened, and projects to the optical member side from the attachment surface. A first boss portion, and a convex portion that is higher than the base end surface of the first boss portion from the mounting surface and protrudes shorter than the distal end surface of the first boss portion. A mounting portion having an insertion hole having a diameter larger than one boss portion and a diameter smaller than the head of the fastener, wherein the mounting portion is configured such that the first boss portion is inserted through the insertion hole; A head of the fastener fastened to a fastening hole, and the protrusion of the mounting member; The reaction force elastically deformed is sandwiched bets, the is held against the mounting member, characterized in that.

  Further, the protrusion length of the convex portion from the base end surface of the first boss portion is larger than the difference between the length of the first boss portion and the thickness of the mounting portion, and the length of the first boss portion is It is preferable that the thickness is longer than the thickness of the mounting portion.

  Further, it is preferable that the mounting member further has a second boss portion projecting from the mounting surface, having a larger diameter than the insertion hole, and having a distal end surface serving as a base end surface of the first boss portion.

  Further, it is preferable that the first boss portion and the convex portion are arranged in a line in a lateral direction of the mounting member.

  Further, it is preferable that the mounting portion is provided at an end in the longitudinal direction of the optical member.

  Further, it is preferable that the optical member is a lens member having a lens portion formed by connecting a plurality of lenses in a longitudinal direction.

  The optical member has a long hole-shaped or slit-shaped first positioning portion extending along the longitudinal direction, and a long hole-shaped or slit-shaped second positioning portion extending along the short direction. The mounting member has a first protrusion fitted into the first positioning part, and a second protrusion fitted into the second positioning part, and the first positioning part is provided on the longitudinal side of the optical member. Preferably, the second positioning portion is formed at both ends in the direction, and is formed at a position aligned with one optical axis of the optical component along the short direction.

  Preferably, the first positioning portion is formed at a position aligned with the optical axis along the longitudinal direction.

  A lamp unit according to the present invention provides a lamp unit capable of suppressing deformation of an optical member while stably mounting an optical member for controlling light distribution of light from a light source to a mounting member. The effect is that it can be done.

FIG. 1 is a perspective view showing a lamp unit. FIG. 2 is an exploded perspective view showing the lamp unit. FIG. 3 is a sectional view showing the lamp unit. FIG. 4 is a front view showing the lamp unit. FIG. 5 is a front view showing the light source substrate. FIG. 6 is a front view showing the heat sink to which the light source substrate and the first lens member are attached. FIG. 7 is a front view showing the heat sink. FIG. 8 is a view taken in the direction of the arrows AA in FIG. FIG. 9 is an explanatory view showing the vicinity of the mounting position of the first lens member and the heat sink before the screws are fastened. FIG. 10 is an explanatory diagram illustrating the vicinity of the mounting position of the first lens member and the heat sink after the screw is fastened.

  Hereinafter, an embodiment of a lamp unit according to the present invention will be described with reference to the drawings. Note that the present invention is not limited by the embodiment. The components in the following embodiments include those that can be easily replaced by those skilled in the art, or those that are substantially the same. In the following description, the front, rear, up, down, left, and right directions are directions in a state where the lamp unit is attached to the vehicle, and indicate directions when the traveling direction of the vehicle is viewed from the driver's seat. In this embodiment, the vertical direction is parallel to the vertical direction, and the horizontal direction is horizontal.

  The configuration of the lamp unit according to the embodiment will be described with reference to the drawings. 1 is a perspective view showing the lamp unit, FIG. 2 is an exploded perspective view showing the lamp unit, FIG. 3 is a sectional view showing the lamp unit, and FIG. 4 is a front view showing the lamp unit. It is. In the embodiment, the lamp unit 1 shown in FIGS. 1 to 4 is a vehicular headlamp mounted on a vehicle. The lamp unit 1 includes a light source substrate 10, a first lens member 20 as an optical member, a second lens member 30 as an optical member, a heat sink 40 as an attachment member, and screws 50, 51, 52 as fasteners. And

(Light source board)
The light source substrate 10 is a long member to which a plurality of (three in this embodiment) light sources 11 are attached. The light source substrate 10 is formed of, for example, a metal material or a resin material. The light source substrate 10 is attached to a heat sink 40. As shown in FIG. 2 and FIG. 3, the plurality of light sources 11 are arranged side by side along the longitudinal direction of the light source substrate 10 at intervals. In the present embodiment, the light source 11 is a semiconductor light source such as an LED, an OEL, and an OLED (organic EL). In the following description, “light source 11a”, “light source 11b”, and “light source 11c” will be appropriately referred to in order from the left side in FIGS. The light source substrate 10 is provided with a power supply unit 12 that supplies power to each light source 11. The power supply unit 12 is connected to a power supply device (not shown).

(First lens member)
The first lens member 20 is an elongated member having a plurality of first lenses 23 as optical components. In the present embodiment, the first lens member 20 is formed of, for example, a polycarbonate resin. The first lens member 20 is attached to the heat sink 40. As shown in FIGS. 2 and 3, the first lens member 20 has a lens unit 21 including a plurality of first lenses 23 and a base 22 extending around the lens unit 21. The lens portion 21 is formed by a plurality of first lenses 23 connected to each other.

  The first lens 23 draws a convex shape toward the opposite side to the light source substrate 10 as shown in FIG. The first lenses 23 are provided one by one at positions corresponding to the light sources 11a, 11b, 11c. In the following description, the first lenses 23 are appropriately referred to as “first lens 23a”, “first lens 23b”, and “first lens 23c” in order from the left side in FIG. The first lens 23a is provided corresponding to the light source 11a, and is a condensing lens for forming a condensed light distribution pattern that condenses light from the light source 11a. Further, the first lens 23a forms a cutoff line for the condensed light distribution pattern. The first lens 23b is provided corresponding to the light source 11b, and is a medium diffusion lens that forms a medium diffusion light distribution pattern in which light from the light source 11b is diffused to a medium extent. The first lens 23c is a diffusion lens that is provided corresponding to the light source 11c and forms a diffused light distribution pattern in which light from the light source 11c is diffused more than the first lens 23b. In the present embodiment, the optical axis AX1 of the first lens 23a, the optical axis AX2 of the first lens 23b, and the optical axis AX3 of the first lens 23c are arranged side by side along the longitudinal direction of the first lens member 20.

(Second lens member)
The second lens member 30 is a long member having a plurality of second lenses 33 as optical components. The second lens member 30 is disposed closer to the traveling direction of the vehicle than the first lens member 20 is. In the present embodiment, the second lens member 30 is formed of, for example, an acrylic resin. The second lens member 30 is attached to the heat sink 40. The second lens member 30 has a lens unit 31 including a plurality of second lenses 33 and a base 32 extending around the lens unit 31. As shown in FIGS. 2 and 3, the lens unit 31 has an emission part (front part) 311 and two legs 312 extending from the emission part 311. The emission part 311 is formed with a second lens 33 continuously. As shown in FIGS. 1 and 3, the lens unit 31 has an opening on the side opposite to the emission unit 311 so that the first lens member 20 can be fitted therein.

  The second lens 33 draws a convex shape toward the light source substrate 10, as shown in FIG. The second lenses 33 are provided one by one at positions corresponding to the light sources 11a, 11b, 11c. In the following description, the second lenses 33 will be appropriately referred to as “second lens 33a”, “second lens 33b”, and “second lens 33c” in order from the left side in FIG. The second lens 33a is provided corresponding to the light source 11a, and has an optical axis AX1 coinciding with the first lens 23a. The second lens 33a is a condensing lens that forms the condensed light distribution pattern together with the first lens 23a. The second lens 33b is provided corresponding to the light source 11b, and has an optical axis AX1 coinciding with the first lens 23b. The second lens 33b is a medium diffusion lens that forms the above-mentioned medium diffusion light distribution pattern together with the first lens 23b. The second lens 33c is provided corresponding to the light source 11c, and has an optical axis AX3 coinciding with the first lens 23c. The second lens 33c forms the diffused light distribution pattern together with the first lens 23c.

(heatsink)
The heat sink 40 is formed of a material having a high thermal conductivity, such as a metal material. The heat sink 40 may be formed of a resin material. The heat sink 40 has a mounting portion 41 and a plurality of fins 42 provided on the mounting portion 41. The light source substrate 10, the first lens member 20, and the second lens member 30 are attached to the attachment surface 41a of the attachment portion 41 by screws 50, 51, and 52. The plurality of fins 42 are formed on a side of the mounting portion 41 opposite to the mounting surface 41a on which the light source substrate 10, the first lens member 20, and the second lens member 30 are mounted. The plurality of fins 42 radiate heat generated in each component of the lamp unit 1 to the outside.

  Next, a positioning structure and a fixing structure of the light source substrate 10, the first lens member 20, and the second lens member 30 with respect to the heat sink 40 will be described with reference to the drawings. FIG. 5 is a front view showing a light source substrate, FIG. 6 is a front view showing a heat sink to which a light source substrate and a first lens member are attached, FIG. 7 is a front view showing a heat sink, and FIG. FIG. 9 is a view taken in the direction of arrows AA in FIG. 6, FIG. 9 is an explanatory view showing the vicinity of the mounting position of the first lens member and the heat sink before screws are fastened, and FIG. FIG. 4 is an explanatory diagram illustrating a vicinity of a mounting position of a first lens member and a heat sink. 8 to 10, illustration of the first lens member 20 other than an attachment portion 232 described later is omitted.

  Here, in the present embodiment, the longitudinal direction, the lateral direction, and the thickness direction of the light source substrate 10, the first lens member 20, the second lens member 30, and the heat sink 40 match. In the following description, the longitudinal direction of the light source substrate 10, the first lens member 20, the second lens member 30, and the heat sink 40 is "longitudinal direction W", the short direction is "short direction H", and the thickness direction (longitudinal direction). The direction orthogonal to W and the transverse direction H) is referred to as “thickness direction D”.

(Positioning structure)
As shown in FIG. 5, the light source substrate 10 has a first substrate positioning unit 101 and a second substrate positioning unit 102. The first substrate positioning portions 101 are provided one by one at both ends in the longitudinal direction W of the light source substrate 10. In the present embodiment, the first substrate positioning portion 101 is formed in a long hole shape extending along the longitudinal direction W. The first substrate positioning portion 101 is formed at a position overlapping with a first positioning portion 201 formed on a first lens member 20 described later when viewed in the thickness direction D. The second substrate positioning portion 102 is formed on the upper side of the light source substrate 10 in a slit shape extending along the lateral direction H. The second substrate positioning portion 102 is formed at a position overlapping a second positioning portion 202 formed on the first lens member 20 described later when viewed in the thickness direction D.

  As shown in FIG. 6, the first lens member 20 has overhangs 24 formed at both ends of the base 22. The overhang portion 24 has an extension portion 241 and an attachment portion 242. The extension portion 241 extends along the longitudinal direction W from a substantially central portion of the base portion 22 in the lateral direction H. The attachment part 242 is formed at an end of the extension part 241. The attachment portion 242 extends in a direction orthogonal to the extension portion 241, that is, in the short direction H. As a result, the notch 25 is formed between the mounting portion 242 and the base 22, that is, on both sides in the short direction H of the extension 241.

  As shown in FIG. 6, the first lens member 20 has a first positioning portion 201 serving as a reference point positioned with respect to the plurality of light sources 11, and a second positioning portion 202. The first positioning portions 201 are formed one by one on the extension portion 241. That is, the first positioning portions 201 are provided one by one at both ends in the longitudinal direction W of the first lens member 20. The first positioning portion 201 is formed in a long hole shape extending along the longitudinal direction W. In the present embodiment, one second positioning portion 202 is provided on the base portion 22 extending above the lens portion 21. The second positioning portion 202 is formed in a long hole shape extending in the short direction H.

  Here, as shown in FIG. 6, the optical axis AX1 of the first lens 23a intersects the center line (extended line) L1 of the first positioning portion 201 and the center line (extended line) L2 of the second positioning portion 202. At or near the position where The first positioning portion 201 is formed at a position aligned with the optical axes AX1, AX2, and AX3 of each first lens 23 along the longitudinal direction W. Further, the second positioning section 202 is formed at a position aligned with the optical axis AX1 of the first lens 23a along the short direction H. In the present embodiment, the center line L1 extending along the longitudinal direction W of the first positioning portion 201 overlaps with the optical axes AX1, AX2, and AX3, as indicated by a dashed line in the drawing. Further, a center line L2 of the second positioning portion 202 extending along the lateral direction H overlaps with the optical axis AX1. It should be noted that “formed at the aligned position” is not limited to the case where the center lines L1 and L2 overlap the optical axes AX1, AX2 and AX3. The first positioning section 201 only needs to dispose the optical axes AX1, AX2, and AX3 near the center line (extension line) L1, and the second positioning section 202 near the center line (extension line) L2. What is necessary is just to arrange the optical axis AX1. For example, as shown in a range surrounded by a broken line in the figure, the optical axes AX1, AX2, and AX3 are arranged within a range of the width in the short direction H of the first positioning unit 201, and the longitudinal direction of the second positioning unit 202 is set. The optical axis AX1 may be arranged within the width range of W.

  As shown in FIG. 4, the second lens member 30 has a third positioning portion 301 serving as a reference point positioned with respect to the plurality of light sources 11, and a fourth positioning portion 302. The third positioning portions 301 are provided one by one at both ends in the longitudinal direction W of the second lens member 30. The third positioning portions 301 are provided one by one on the base 32 extending to the side of the lens portion 31. The third positioning portion 301 is formed in a long hole shape extending along the longitudinal direction W. In the present embodiment, one fourth positioning portion 302 is provided on the base portion 32 extending above the lens portion 31. The fourth positioning portion 302 is formed in a slit shape extending along the short direction H.

  Here, as shown in FIG. 4, the optical axis AX1 of the second lens 33a intersects the center line (extended line) L3 of the third positioning portion 301 and the center line (extended line) L4 of the fourth positioning portion 302. At or near the position where The third positioning portion 301 is formed at a position aligned with the optical axes AX1, AX2, and AX3 of each second lens 33 along the longitudinal direction W. The fourth positioning portion 302 is formed at a position aligned with the optical axis AX1 of the second lens 33a along the short direction H. In the present embodiment, the center line L3 extending along the longitudinal direction W of the third positioning portion 301 overlaps with the optical axes AX1, AX2, and AX3, as indicated by the dashed line in the drawing. Further, a center line L4 of the fourth positioning portion 302 extending along the lateral direction H overlaps with the optical axis AX1. As a result, in the present embodiment, the first positioning portion 201 and the third positioning portion 301 are arranged along the longitudinal direction W. Further, the second positioning portion 202 and the fourth positioning portion 302 are arranged along the short direction H. It should be noted that “formed at the aligned position” is not limited to the case where the center lines L3, L4 overlap the optical axes AX1, AX2, AX3. The third positioning portion 301 may have the optical axes AX1, AX2, and AX3 arranged near the center line (extended line) L3, and the fourth positioning portion 302 may be arranged near the center line (extended line) L4. What is necessary is just to arrange the optical axis AX1. For example, as shown in a range surrounded by a broken line in the drawing, the optical axes AX1, AX2, and AX3 are arranged within the range of the width in the short direction H of the third positioning portion 301, and the longitudinal direction of the fourth positioning portion 402 The optical axis AX1 may be arranged within the width range of W.

  As shown in FIG. 7, the heat sink 40 has a pin-shaped first protrusion 401, a second protrusion 402, a third protrusion 403, and a fourth protrusion 404 formed on the mounting portion 41. The first protruding portions 401 are formed one by one at positions that can be fitted into the first substrate positioning portion 101 and the first positioning portion 201. One second protruding portion 402 is formed at a position where it can be fitted into second substrate positioning portion 102 and second positioning portion 202. The third protruding portions 403 are formed one by one at positions that can be fitted into the third positioning portions 301. One fourth protruding portion 404 is formed at a position where it can be fitted into the fourth positioning portion 302.

(Mounting structure)
The light source substrate 10 has a plurality of screw insertion holes 103 as shown in FIG. The plurality of screw insertion holes 103 are formed two each at both ends in the longitudinal direction W of the light source substrate 10. The screw insertion hole 103 is formed at a position that overlaps with the notch 25 formed in the first lens member 20 described above when viewed in the thickness direction D.

  The first lens member 20 has a plurality of screw insertion holes 203 as shown in FIG. The plurality of screw insertion holes 203 are formed one by one in the mounting portion 242. The screw insertion hole 203 is provided at a position corresponding to a boss 43 formed in the heat sink 40 described later, and is formed so that a part of the boss 43 can be inserted. The screw insertion hole 203 is formed to have a smaller diameter than the head 51a of the screw 51 (see FIG. 10).

  The second lens member 30 has a plurality of screw insertion holes 303 as shown in FIG. A plurality of screw insertion holes 303 are formed two at each end of the first lens member 20 in the lateral direction H. Two screw insertion holes 303 are provided in the base 32 extending to the side of the lens unit 31.

  As shown in FIG. 7, the heat sink 40 has a first fastening hole 411 and a second fastening hole 412 formed in the mounting portion 41. Two first fastening holes 411 are formed at each end of the mounting portion 41. The first fastening hole 411 is a screw hole capable of fastening the screw 50 (see FIG. 2). The first fastening hole 411 is formed at a position overlapping the screw insertion hole 103 when viewed from the thickness direction D. Two second fastening holes 412 are formed outside the first fastening hole 411, two at each end of the mounting portion 41. The second fastening hole 412 is a screw hole capable of fastening the screw 52 (see FIG. 2). The second fastening hole 412 is formed at a position overlapping the screw insertion hole 303 when viewed from the thickness direction D.

  Further, as shown in FIG. 7, the heat sink 40 has a plurality of boss portions 43 formed on the mounting portion 41. In the present embodiment, the boss portions 43 are formed one by one at both ends in the longitudinal direction W of the heat sink 40. More specifically, the boss 43 is formed between the first protrusion 401 and the third protrusion 403 at the center of the plurality of protrusions 44 in the short direction H.

  As shown in FIG. 8, the boss 43 has a first boss 431 and a second boss 432. The first boss 431 projects from the second boss 432. In other words, in the first boss portion 431, the distal end surface of the second boss portion 432 becomes the proximal end surface 431a. The first boss 431 has a smaller diameter than the screw insertion hole 203 of the first lens member 20. As shown in FIG. 10, the first boss 431 has a length LE1 from the base end surface 431 a to the front end surface 431 b that is larger than the thickness T of the mounting portion 242 of the first lens member 20. The second boss 432 projects from the mounting surface 41a. The second boss 432 is formed to have a larger diameter than the screw insertion hole 203 of the first lens member 20.

  The boss portion 43 has a fastening hole 433 that penetrates the centers of the first boss portion 431 and the second boss portion 432. The fastening hole 433 extends to the inside of the heat sink 40. The fastening hole 433 is a screw hole to which the screw portion 51b of the screw 51 can be fastened. When the screw portion 51b is fastened to the fastening hole 433, the boss portion 43 comes into contact with the head portion 51a on the distal end surface 431b of the first boss portion 431.

  Further, the heat sink 40 has a plurality of convex portions 44. In the present embodiment, as shown in FIG. 7, two protrusions 44 are formed at both ends in the longitudinal direction W of the heat sink 40. More specifically, the protrusions 44 are arranged in a line in the short direction H with the boss 43, and two protrusions 44 are formed with the boss 43 interposed therebetween. As shown in FIG. 9, the convex portion 44 protrudes from the mounting surface 41a longer than the proximal end surface 431a of the first boss portion 431 and shorter than the distal end surface 431b. As shown in FIG. 10, the protrusion length LE2 of the protrusion 44 from the base end surface 431a of the first boss portion 431 is equal to the difference between the length LE1 of the first boss portion 431 and the thickness T of the attachment portion 242 ( (The length in the thickness direction D of the gap S in the figure). Note that the protrusion length LE2 with respect to the base end surface 431a means a length in the thickness direction D from the base end surface 431a to the vertex of the protrusion 44.

(Assembly of lamp unit)
As shown in FIG. 2, the lamp unit 1 is arranged in the order of the light source substrate 10, the first lens member 20, and the second lens member 30 from the side closer to the heat sink 40, and each member is mounted on the mounting portion 41 of the heat sink 40. .

  First, the first protrusion 401 of the heat sink 40 is fitted into the first board positioning section 101 of the light source board 10. Accordingly, the movement of the light source substrate 10 in the short direction H with respect to the heat sink 40 is regulated by the first protrusion 401, and the light source substrate 10 is positioned in the short direction H. Further, as shown by the broken arrow in the figure, the second protrusion 402 of the heat sink 40 is fitted into the second substrate positioning portion 102 of the light source substrate 10. Accordingly, the movement of the light source substrate 10 in the longitudinal direction W with respect to the heat sink 40 is regulated by the second protrusion 402, and the positioning of the light source substrate 10 in the longitudinal direction W is performed. Then, the screw 50 is fastened to each first fastening hole 411 of the heat sink 40 via each screw insertion hole 103.

  Next, the first protrusion 401 of the heat sink 40 is fitted into the first positioning portion 201 of the first lens member 20. Accordingly, the movement of the first lens member 20 in the short direction H with respect to the heat sink 40 is restricted by the first protrusion 401, and the first lens member 20 is positioned in the short direction H. In addition, the second protrusion 402 of the heat sink 40 is fitted into the second positioning part 202 of the first lens member 20. Accordingly, the movement of the first lens member 20 in the longitudinal direction W with respect to the heat sink 40 is regulated by the second protrusion 402, and the positioning of the first lens member 20 in the longitudinal direction W is performed. In addition, as shown in FIG. 6, since the notch 25 is formed in the first lens member 20, the screw 50 does not interfere with the first lens member 20.

  At this time, as shown in FIG. 9, the first boss portion 431 is inserted into the screw insertion hole 203, and the mounting portion 242 contacts the convex portion 44 formed on the heat sink 40. Then, as shown in FIG. 10, the screw portion 51 b of the screw 51 is fastened to the fastening hole 433 of the heat sink 40 via the screw insertion hole 203. The screw 51 is screwed into the fastening hole 433 until the head 51 a contacts the tip end surface 431 b of the boss 43. As described above, the protrusion length LE2 of the protrusion 44 from the base end surface 431a is the difference between the length LE1 of the first boss 431 and the thickness T of the mounting portion 242 (the length of the gap S in the thickness direction D in the figure). Larger). As a result, the mounting portion 242 is pressed toward the mounting surface 41 a by the head 51 a of the screw 51, is elastically deformed with the protrusion 44 as a base point, and is sandwiched between the head 51 a and the protrusion 44. In FIG. 10, the gap S is shown larger than the actual size for the sake of explanation.

  Further, as a result of elastic deformation of the mounting portion 242, the portion 242a pressed by the head portion 51a moves to the base end surface 431a side. As a result, the portion 242a may come into contact with the base end surface 431a. However, as described above, the length LE1 of the first boss portion 431 is formed larger than the thickness T of the mounting portion 242. Therefore, even if the portion 242a of the mounting portion 242 comes into contact with the base end surface 431a, the force with which the mounting portion 242 is pressed against the base end surface 431a does not become excessively large. As described above, the first lens member 20 is attached to the heat sink 40 using the reaction force of the elastically deformed attachment portion 242 sandwiched between the head portion 51a of the screw 51 and the convex portion 44 of the heat sink 40.

  Further, the third protrusion 403 of the heat sink 40 is fitted into the third positioning part 301 of the second lens member 30. Thus, the movement of the second lens member 30 in the short direction H with respect to the heat sink 40 is restricted by the third protrusion 403, and the second lens member 30 is positioned in the short direction H. Further, the fourth protrusion 404 of the heat sink 40 is fitted into the fourth positioning part 302 of the second lens member 30. Accordingly, the movement of the second lens member 30 in the longitudinal direction W with respect to the heat sink 40 is regulated by the fourth protrusion 404, and the positioning of the second lens member 30 in the longitudinal direction W is performed. Then, the screw 51 is fastened to each second fastening hole 412 of the heat sink 40 via each screw insertion hole 303. Thereby, the second lens member 30 is fixed to the heat sink 40, and the assembly of the lamp unit 1 shown in FIG. 1 is completed.

  In the lamp unit 1 assembled as described above, the first substrate positioning portion 101, the first positioning portion 201, and the third positioning portion 301 have a long hole shape extending along the longitudinal direction W. Therefore, expansion or contraction (dimensional change) due to heat in the longitudinal direction W of the light source substrate 10, the first lens member 20, and the second lens member 30 is allowed. Further, the second substrate positioning portion 102, the second positioning portion 202, and the fourth positioning portion 302 have a long hole shape or a slit shape extending along the short direction H. Therefore, expansion or contraction (dimensional change) of the light source substrate 10, the first lens member 20, and the second lens member 30 due to heat in the lateral direction H is allowed. That is, in both the longitudinal direction W and the lateral direction H, the expansion or contraction (dimensional change) due to heat due to the thermal effect of the light source substrate 10, the first lens member 20, and the second lens member 30 can be absorbed.

  As described above, in the lamp unit 1 according to the embodiment, the first lens member 20 is sandwiched between the head portion 51a of the screw 51 and the convex portion 44 of the heat sink 40 and is caused by the reaction force of the elastically deformed mounting portion 242. , Attached to the heat sink 40.

  With this configuration, if the protrusion height L2 of the protrusion 44 relative to the base end surface 431a is adjusted, the magnitude of the reaction force acting on the attachment 242 can be adjusted. This makes it possible to finely adjust the force acting on the mounting portion 242 and thereby reduce it, as compared with the case where the mounting portion 242 is fixed to the mounting surface 41a while compressing the mounting portion 242 with the axial force of the screw 51. As a result, the movement of the mounting portion 242 with respect to the heat sink 40 can be allowed, and expansion or contraction (dimensional change) of the first lens member 20 due to thermal influence or the like is absorbed by the movement of the mounting portion 242 with respect to the heat sink 40. It becomes possible. Therefore, according to the configuration of the embodiment, the deformation of the first lens member 20 is suppressed while the first lens member 20 that controls the light distribution of the light from the light source 11 is stably attached to the heat sink 40. Can be provided.

  The protrusion length LE2 of the first boss portion 431 from the base end surface 431a is the difference between the length LE1 of the first boss portion 431 and the thickness T of the mounting portion 242 (the length of the gap S in the thickness direction D in FIG. 10). The length LE1 of the first boss portion 431 is larger than the thickness T of the mounting portion 242.

  With this configuration, the mounting portion 242 is pressed toward the mounting surface 41 a by the head 51 a of the screw 51, elastically deformed with the protrusion 44 as a base point, and can be sandwiched between the head 51 a and the protrusion 44. Further, since the difference between the length LE1 of the first boss portion 431 and the thickness T of the mounting portion 242 is larger, even if the mounting portion 242 contacts the base end surface 431a, the force acting on the mounting portion 242 is excessively large. It does not grow. Therefore, it is possible to reduce the force acting on the mounting portion 242 and allow the mounting portion 242 to move with respect to the heat sink 40.

  The heat sink 40 further has a second boss portion 432 projecting from the mounting surface 41a, having a larger diameter than the screw insertion hole 203, and having a distal end surface serving as a base end surface 431a of the first boss portion 431.

  With this configuration, a space can be formed between the mounting portion 242 of the first lens member 20 and the mounting surface 41 a of the heat sink 40 by the length of the second boss 432. As a result, as shown in FIG. 3, another member (in the embodiment, the light source substrate 10) can be arranged between the first lens member 20 and the heat sink 40.

  Further, the first boss portion 431 and the convex portion 44 are arranged in a line in the short direction H of the heat sink 40.

  With this configuration, the mounting portion 242 can be stably held between the head portion 51a of the screw 51 and the convex portion 44.

  Further, the mounting portion 242 is provided at an end of the first lens member 20 in the longitudinal direction W.

  With this configuration, expansion or contraction (dimensional change) is allowed in the longitudinal direction W of the first lens member 20 in which expansion or contraction (dimensional change) is particularly likely to occur due to thermal influence or the like, and generation of deformation is suppressed. can do.

  The optical member is a first lens member 20 having a lens portion 21 in which a plurality of first lenses 23 are continuously formed in the longitudinal direction W.

  With this configuration, since the first lens 23 continues in the longitudinal direction W, a portion having a small thickness and a portion having a large thickness are continuously formed, and the first lens member 20, which tends to decrease in rigidity, expands or contracts (dimensional change). ) Allows deformation to be suppressed.

  Further, the first lens member 20 includes a long hole-shaped or slit-shaped first positioning portion 201 extending along the longitudinal direction W and a long hole-shaped or slit-shaped second positioning portion 202 extending along the short direction H. The heat sink 40 has a first protrusion 401 fitted into the first positioning portion 201 and a second protrusion 402 fitted into the second positioning portion 202, and the first positioning portion 202 Are formed at both ends of the first lens member 20 in the longitudinal direction W, and the second positioning portions 202 are formed at positions aligned with the optical axis AX1 of the first lens 23a along the short direction H.

  With this configuration, since the second positioning portion 202 is formed at a position aligned with the optical axis AX1 of the first lens 23a along the short direction H, the first lens member 20 can be moved in the longitudinal direction when affected by heat. In H, the first lens 23a expands or contracts (dimension changes) around the optical axis AX1. As a result, it is possible to prevent the optical axis AX1 of the first lens 23a from being shifted from the initial position, particularly in the longitudinal direction W where expansion or contraction (dimensional change) due to heat is likely to occur. Therefore, the light distribution pattern formed by the first lens 23a can be more appropriately maintained.

  Also, since the first positioning portion 201 is formed at both ends in the longitudinal direction W of the first lens member 20, the first positioning portion 201 is formed in the shorter direction H as compared with the case where the first positioning portion 201 is formed at another position. The movement of one lens member 20 can be regulated more stably. As a result, even if, for example, vibration or impact is applied to the lamp unit 1 or frictional torque is applied when the first lens member 20 is screwed to the heat sink 40 with the screw 50, the first lens member 20 is moved in the lateral direction. H can be prevented from deviating from the initial position.

  Therefore, according to the embodiment, it is possible to provide the lamp unit 1 that can hold the positional relationship between the plurality of light sources 11 and the first lens 23 that is an optical component corresponding to each light source 11 with higher accuracy. In particular, the configuration of the embodiment is suitable for application to the lamp unit 1 including the first lens member 20 which is formed of a resin material and easily expands or contracts (dimensionally changes) due to thermal influence or the like.

  The first positioning section 201 is formed at a position aligned with the optical axis AX1 along the longitudinal direction W.

  With this configuration, when affected by heat, the first lens member 20 expands or contracts (changes in dimension) about the optical axis AX1 of the first lens 23a even in the short direction H. As a result, even in the short direction H, it is possible to prevent the optical axis AX1 of the first lens 23a from being shifted from the initial position.

  In addition, a plurality of light sources 11 are provided side by side, and further include a light source substrate 10 attached to the heat sink 40 between the light source 11 and the first lens member 20. The light source substrate 10 is provided at a position corresponding to the first positioning portion 201. , A slit-shaped second substrate provided at a position corresponding to the long hole-shaped or slit-shaped first substrate positioning portion 101 extending along the longitudinal direction W and the second positioning portion 202 and extending along the short direction H The first protrusion 401 is fitted into the first positioning portion 201 and the first substrate positioning portion 101, and the second protrusion 402 is connected to the second positioning portion 202 and the second substrate positioning portion. 102.

  With this configuration, the light source substrate 10 and the first lens member 20 can be positioned with respect to the heat sink 40 at the same position. As a result, the positional relationship between the light source substrate 10 and the first lenses 23a, 23b, 23c can be maintained more accurately. Further, since the first projection 401 and the second projection 402, which are positioning pins, can be shared by the light source substrate 10 and the first lens member 20, the structure of the heat sink 40 can be simplified. Become.

  Further, the first lens 23a forms a light distribution pattern having a cutoff line.

  With this configuration, by suppressing the optical axis AX1 of the first lens 23a from being shifted from the initial position, the cutoff line of the light distribution pattern can be maintained at a desired position.

  The first lens 23a forms a condensed light distribution pattern.

  With this configuration, by suppressing the optical axis AX1 of the first lens 23a from deviating from the initial position, the condensed light distribution pattern in which light is concentrated in a predetermined range as compared with the diffuse light distribution pattern can be moved to a desired position. Can be maintained.

  The optical member is a first lens member 20 having a plurality of first lenses 23 (23a, 23b, 23c) as a plurality of optical components.

  With this configuration, the positions of the first lenses 23a, 23b, and 23c with respect to the light source 11 can be more accurately maintained.

  Further, a second lens member 30 which is provided in a plurality at a position corresponding to each light source 11 and has a second lens 33 for controlling light distribution of the light from the light source 11 together with the first lens 23 is further provided. 30 has a long hole-shaped third positioning portion 301 extending along the longitudinal direction W, and a slit-shaped fourth positioning portion 302 extending along the short direction H, and the heat sink 40 has a third positioning portion. There is a third protrusion 403 that fits into the third positioning member 302, and a fourth protrusion 404 that fits into the fourth positioning part 302. The third positioning part 301 has both ends in the longitudinal direction W of the second lens member 30. The fourth positioning portion 302 is formed at a position aligned with the optical axis AX1 of the second lens 33a along the short direction H.

  With this configuration, the second lens member 30 is positioned with respect to the heat sink 40 in the lateral direction H by the third positioning portion 301 and the third protrusion 403. Further, the second lens member 30 is positioned with respect to the heat sink 40 in the longitudinal direction W by the fourth positioning portion 302 and the fourth protrusion 404.

  Then, the third positioning portion 302 is formed at a position aligned with the optical axis AX1 of the second lens 33a along the short direction H. Therefore, when affected by heat, the second lens member 30 expands or contracts (dimension changes) around the optical axis AX1 of the second lens 33a in the longitudinal direction H. As a result, it is possible to prevent the optical axis AX1 of the second lens 33a from being shifted from the initial position, particularly in the longitudinal direction in which expansion or contraction (dimensional change) due to heat is likely to occur. Therefore, the light distribution pattern formed by the second lens 33a can be more appropriately maintained.

  Further, third positioning portions 301 are formed at both ends in the longitudinal direction W of the second lens member 30. Therefore, the movement of the second lens member 30 in the short direction H can be more stably regulated than when the third positioning portion 301 is formed at another position. As a result, even if, for example, vibration or impact is applied to the lamp unit 1 or frictional torque is applied when the second lens member 30 is screwed to the heat sink 40 with the screw 51, the second lens member 30 is moved in the short direction. H can be prevented from deviating from the initial position.

  Further, the third positioning portion 301 is formed at a position aligned with the optical axis AX1 along the longitudinal direction W.

  With this configuration, when affected by heat, the second lens member 30 expands or contracts (changes in dimension) around the optical axis AX1 of the second lens 33a even in the short direction H. As a result, even in the short direction H, it is possible to suppress the optical axis AX1 of the second lens 33a from being shifted from the initial position.

  In the present embodiment, the optical axis AX1 of the first lens 23a and the second lens 33a, the optical axis AX2 of the first lens 23b and the second lens 33b, and the optical axis AX3 of the first lens 23c and the second lens 33c are: They are arranged side by side along the longitudinal direction W. Then, the second positioning portion 202 of the first lens member 20 and the third positioning portion 302 of the second lens member 30 are aligned with all of the optical axes AX1, AX2, and AX3 along the longitudinal direction W. Therefore, even if the first lens member 20 or the second lens member 30 expands or contracts (dimensionally changes) under the influence of heat, all of the optical axes AX1, AX2, and AX3 may deviate from the initial position in the lateral direction H. Be suppressed.

  In the present embodiment, the light source substrate 10 provided with the plurality of light sources 11 is used. However, the plurality of light sources 11 may be directly attached to the heat sink 40. In this case, a space for disposing the light source substrate 10 is not required. Therefore, the second boss 432 may be omitted from the boss 43. That is, the first boss portion 431 may protrude from the mounting surface 41a. When the first boss 431 is projected from the mounting surface 41a, the base end surface 431a of the first boss 431 described in the embodiment becomes the mounting surface 41a.

  In the present embodiment, two convex portions 44 are arranged with one first boss portion 431 interposed therebetween in the short direction H. However, the arrangement relationship between the first boss portion 431 and the convex portion 44 is as follows. It is not limited to this. For example, two first bosses 431 (bosses 43) may be arranged with one protrusion 44 interposed therebetween in the short direction H. Further, the first boss portion 431 and the convex portion 44 may not be arranged in a line in the short direction H. The first boss portion 431 and the convex portion 44 connect the first lens member 20 to the heat sink 40 by the reaction force of the elastically deformed mounting portion 242 sandwiched between the head portion 51 a of the screw 51 and the convex portion 44 of the heat sink 40. Any arrangement can be used as long as it can be attached.

  Further, in the present embodiment, the attachment portions 232 are provided at both ends in the longitudinal direction W of the first lens member 20, but the arrangement position of the attachment portions 232 is not limited to this. For example, the mounting portion 232 may be provided only at one end of the first lens member 20 in the longitudinal direction W, and may be fixed to the heat sink 40 while compressing the first lens member 20 with the axial force of the screw 51 at the other end. . Further, the attachment portion 232 may be provided at an end of the first lens member 20 in the short direction H.

  In addition, the first substrate positioning unit 101, the second substrate positioning unit 102, the first positioning unit 201, the second positioning unit 202, the third positioning unit 301, and the fourth positioning unit 302 can be formed into any one of an elongated hole and a slit It may be formed.

  Further, in the present embodiment, the first lens member 20 has the first lens portion 21 formed by connecting the plurality of first lenses 23, but the first lens member 20 has a single lens. And may have four or more lenses.

  Further, in the present embodiment, the case where the first lens member 20 is used as the optical member has been described as an example. However, the optical member is not limited to a lens, and may be a reflector.

  Further, in this embodiment, the heat sink 40 is used as the mounting member, but the mounting member may be a member other than the heat sink 40.

DESCRIPTION OF SYMBOLS 1 Lamp unit 10 Light source board 11, 11a, 11b, 11c Light source 12 Power supply part 20 First lens member 21, 31 Lens part 22, 32 Base part 23, 23a, 23b, 23c First lens 24 Overhang part 25 Notch part 30 First 2 lens member 33, 33a, 33b, 33c Second lens 40 Heat sink 41 Mounting portion 41a Mounting surface 42 Fin 43 Boss 43a Tip surface 44 Convex portion 50, 51, 52 Screw 51a Head 51b Screw portion 101 First substrate positioning portion 102 second board positioning section 103, 203, 303 screw insertion hole 201 first positioning section 202 second positioning section 241 extension section 242 mounting section 301 third positioning section 302 fourth positioning section 311 emission section 312 leg section 401 first Projecting portion 402 Second projecting portion 403 Third projecting portion 404 Fourth Projecting portion 411 First fastening hole 412 Second fastening hole 431 First boss portion 431a Base end surface 431b Tip surface 432 Second boss portion 433 Fastening hole AX1, AX2, AX3 Optical axis D Thickness direction H Short direction L1, L2, L3 , L4 center line W longitudinal direction

Claims (8)

A light source,
An optical member having an optical component that controls light distribution from the light source,
A mounting member having a mounting surface to which the optical member is mounted,
A fastener for attaching the optical member to the attachment member;
With
The mounting member has a fastening hole into which the fastener is fastened, a first boss protruding from the mounting surface toward the optical member, and a first boss from the mounting surface closer to a base end surface of the first boss. High, and having a projection projecting shorter than the tip end surface of the first boss portion,
The optical member has a mounting portion having an insertion hole having a diameter larger than the first boss portion and smaller than the head of the fastener,
The attachment portion is elastically deformed by being sandwiched between the head of the fastener fastened to the fastening hole and the protrusion of the attachment member in a state where the first boss portion is inserted into the insertion hole. Held against the mounting member by the applied reaction force,
A lamp unit, characterized in that: The protrusion length of the protrusion from the base end surface of the first boss is greater than the difference between the length of the first boss and the thickness of the mounting portion,
A length of the first boss portion is longer than a thickness of the mounting portion;
The lamp unit according to claim 1, wherein:   2. The mounting member according to claim 1, wherein the mounting member protrudes from the mounting surface, has a larger diameter than the insertion hole, and further has a second boss portion having a distal end surface serving as a base end surface of the first boss portion. 3. The lamp unit according to claim 2.   The lamp unit according to any one of claims 1 to 3, wherein the first boss portion and the convex portion are arranged in a line in a short direction of the mounting member.   The lamp unit according to claim 1, wherein the mounting portion is provided at an end in a longitudinal direction of the optical member.   The lamp unit according to claim 5, wherein the optical member is a lens member having a lens portion formed by connecting a plurality of lenses in a longitudinal direction. The optical member has a long hole-shaped or slit-shaped first positioning portion extending along the longitudinal direction, and a long hole-shaped or slit-shaped second positioning portion extending along the short direction,
The mounting member has a first protrusion fitted into the first positioning portion, and a second protrusion fitted into the second positioning portion,
The first positioning portion is formed at both ends in the longitudinal direction of the optical member,
The second positioning portion is formed at a position aligned with one optical axis of the optical component along the short direction.
The lamp unit according to any one of claims 1 to 6, wherein:   The lamp unit according to claim 7, wherein the first positioning portion is formed at a position aligned with the optical axis along the longitudinal direction.

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