EP4678972A1

EP4678972A1 - Vehicle lamp

Info

Publication number: EP4678972A1
Application number: EP24770805.0A
Authority: EP
Inventors: Toshiya Abe
Original assignee: Ichikoh Industries Ltd
Current assignee: Ichikoh Industries Ltd
Priority date: 2023-03-10
Filing date: 2024-03-08
Publication date: 2026-01-14
Also published as: JP2024128564A; WO2024190699A1; CN120752474A

Abstract

A vehicle lamp includes: a light source unit; an optical system that irradiates the front of a vehicle with light from the light source unit; a shade that blocks part of light guided by the optical system; and a support member that supports the light source unit, the optical system, and the shade. At least one optical component among the light source unit, the shade, and the optical system is fixed to the support member with one screw member. The support member includes: a screw hole; and two protrusions provided at positions across the screw hole. The optical component includes: a screw through hole; and positioning holes that are provided at positions across the screw through hole and into which the two protrusions are inserted. The screw hole and the two protrusions are aligned in a first direction along a straight line. The two positioning holes respectively have diameters larger than the diameters of the protrusions and are disposed at positions shifted, with respect to positions in the first direction with reference to the screw through hole, by predetermined offset values along a rotation direction in fixing the screw member.

Description

TECHNICAL FIELD

The present invention relates to a vehicle lamp.

BACKGROUND ART

When fixing an optical component to a fixing member in a vehicle light, a method is known in which a positioning pin on the fixing member side is inserted into a positioning hole of the optical component to position the optical component and, in this state, the optical component is then fastened to the fixing member with a screw member (see, for example, Patent Literature 1).

PRIOR ART LITERATURE

Patent Literature

Patent Literature 1: JP 2016-100231 A

SUMMARY OF INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

In a configuration in which the positioning pin is inserted into the positioning hole to position the optical component as in Patent Literature 1, the diameter of the positioning hole is designed to be larger than the diameter of the positioning pin in order to, for example, prevent interference due to variations in dimensions of those portions. For this reason, when fastening the optical component with the screw member from the state of being positioned, torque transmitted to the optical component when rotating the screw member may cause positional deviation of the optical component.
The present invention has been made in view of the above, and an object of the present invention is to provide a vehicle lamp capable of suppressing positional deviation when fixing an optical component with a screw member.

SOLUTION TO PROBLEMS

A vehicle lamp according to the present invention includes: a light source unit; an optical system that irradiates a front of a vehicle with light from the light source unit; a shade that blocks a part of light guided by the optical system; and a support member that supports the light source unit, the optical system, and the shade. At least one optical component among the light source unit, the shade, and the optical system is fixed to the support member with one screw member. The support member includes: a screw hole into which the screw member is inserted; and two protrusions that are disposed at positions across the screw hole and that position the optical component. The optical component includes: a screw through hole through which the screw member passes; and positioning holes that are disposed at positions across the screw through hole and into which the two protrusions are inserted. The screw hole and the two protrusions are aligned in a first direction along a straight line. The two positioning holes respectively have diameters larger than diameters of the protrusions and are disposed at positions shifted, with respect to positions in the first direction with reference to the screw through hole, by predetermined offset values along a rotation direction in fixing the screw member.

EFFECTS OF THE INVENTION

According to the present invention, it is possible to provide a vehicle lamp capable of suppressing positional deviation when fixing an optical component with a screw member.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view illustrating an example of a vehicle lamp according to a first embodiment.
FIG. 2 is an exploded perspective view illustrating an example of the vehicle lamp according to the first embodiment.
FIG. 3 is a diagram illustrating an example of a shade fixing portion in the front view.
FIG. 4 is a diagram illustrating an example of a shade in the front view.
FIG. 5 is a diagram illustrating a state in which the shade is fixed to the shade fixing portion.
FIG. 6 is a diagram illustrating the state in which the shade is fixed to the shade fixing portion.
FIG. 7 is an exploded perspective view illustrating an example of a vehicle lamp according to a second embodiment.
FIG. 8 is a diagram illustrating an example of a shade fixing portion in the front view.
FIG. 9 is a diagram illustrating an example of a shade in the front view.
FIG. 10 is a diagram illustrating a state in which the shade is fixed to the shade fixing portion.
FIG. 11 is a diagram illustrating the state in which the shade is fixed to the shade fixing section.

MODES FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of a vehicle lamp according to the present invention are explained with reference to the drawings. Note that the present invention is not limited by the embodiments. Constituent elements in the embodiments explained below include constituent elements that can be easily replaced by those skilled in the art or constituent elements that are substantially the same.
In the following explanation, each of the front-rear direction, the up-down direction, and the left-right direction indicates a direction of a vehicle headlight when mounted on a vehicle. Forward refers to a front direction at the time when the vehicle moves forward in a straight traveling state. Rearward refers to an opposite direction of the forward in the horizontal plane. Upward refers to a direction away from a traveling surface of the vehicle in a direction orthogonal to the horizontal plane. Downward refers to an opposite direction of the upward in the direction orthogonal to the horizontal plane. Leftward refers to a left direction at the time when the vehicle moves forward in the straight traveling state. Rightward refers to an opposite direction of the leftward in the horizontal plane. Note that the forward is the front side, and the rearward is the back side.

[First Embodiment]

FIG. 1 is a perspective view illustrating an example of a vehicle lamp 100 according to a first embodiment. FIG. 2 is an exploded perspective view illustrating an example of the vehicle lamp 100 according to the first embodiment. As illustrated in FIG. 1 and FIG. 2, the vehicle lamp 100 includes a light source unit 10, an optical system 20, a shade 30, and a support member 40. The vehicle lamp 100 forms, for example, a low beam pattern in front of a vehicle.
The light source unit 10 includes a light source 11 and a substrate 12. The light source 11 is, for example, a semiconductor light source such as an LED. The light source 11 is mounted on the substrate 12. The substrate 12 is fixed to the support member 40 with, for example, a screw member.
The optical system 20 includes a reflector 21 and a projection lens 22. The reflector 21 reflects light from the light source 11 toward the projection lens 22. The reflector 21 is disposed above the light source 11 and is formed using a material having high heat resistance and light non-transmissivity, such as a resin member. The reflector 21 is fixed to the support member 40 with, for example, a screw member. The reflector 21 has a hollow shape in which a front side portion and a lower side portion are opened and a rear side portion, an upper side portion, and both left and right side portions are closed. Reflection surfaces are formed on the inner surfaces of the reflector 21.
The projection lens 22 is disposed in front of the reflector 21. The projection lens 22 is attached to the support member 40 by, for example, laser welding. Note that the projection lens 22 may be supported by the support member 40 via, for example, a lens holder. The optical axis of the projection lens 22 coincides with or substantially coincides with the optical axis of the reflector 21. The projection lens 22 irradiates the front of the vehicle with the reflected light from the reflector 21.
The shade 30 is formed in a plate shape by a member capable of blocking light from the light source unit 10, such as a metal plate. The shade 30 has a horizontal portion 31a for forming a horizontal cutoff line of, for example, a low beam pattern and an inclined portion 31b for forming an oblique cutoff line. The shade 30 is fixed to the support member 40 with, for example, a screw member. The shade 30 is disposed, for example, between the reflector 21 and the projection lens 22. The shade 30 blocks a part of the reflected light of the light emitted from the light source 11 and reflected by the reflector 21.
The support member 40 supports the light source unit 10, the optical system 20, and the shade 30. The support member 40 has a function as a heat sink that dissipates heat generated by the light source 11 to the outside. The support member 40 can be manufactured using, for example, die molding. At least one optical component 60 among the light source unit 10, the optical system 20, and the shade 30 is fixed to the support member 40 with one screw member 50. Hereinafter, the present embodiment will describe, as an example, a case in which the optical component 60 fixed by the one screw member 50 is the shade 30.
The support member 40 includes a shade fixing portion 41. The shade fixing portion 41 fixes the shade 30 explained above. FIG. 3 is a diagram illustrating an example of the shade fixing portion 41 in the front view. As illustrated in FIG. 3, the shade fixing portion 41 includes a screw hole 42 and protrusions 43 and 44. The screw member 50 for fixing the shade 30 is inserted into the screw hole 42. A screw thread corresponding to the screw member 50 is formed on the inner surface of the screw hole 42. The screw hole 42 extends rearward.
The protrusions 43 and 44 are disposed at positions across the screw hole 42. The protrusions 43 and 44 extend forward. The screw hole 42 and the two protrusions 43 and 44 are aligned in a first direction D1 along a straight line. In the present embodiment, the first direction D1 is a direction parallel to the up-down direction. In this case, the protrusion 43 is disposed above the screw hole 42 and the protrusion 44 is disposed below the screw hole 42. The distance between the screw hole 42 and the protrusion 43 and the distance between the screw hole 42 and the protrusion 44 are equal to each other.
Each of the protrusions 43 and 44 has a circular shape in the front view and has, for example, a cylindrical shape or a truncated cone shape.
FIG. 4 is a view illustrating an example of the shade 30 in the front view. As illustrated in FIG. 4, the shade 30 includes a screw through hole 32 and two positioning holes 33 and 34.
The screw through hole 32 allows the screw member 50 to pass through when fixing the shade 30 to the support member 40.
The two positioning holes 33 and 34 are disposed at positions across the screw through hole 32. In the present embodiment, the screw through hole 32 and the two positioning holes 33 and 34 are disposed along a straight line orthogonal to the horizontal portion 31a in the front view. The positioning hole 33 has, for example, an oval shape in the front view. The protrusion 43 explained above is inserted into the positioning hole 33. The positioning hole 34 has, for example, an oval shape in front view. The protrusion 44 explained above is inserted into the positioning hole 34. The shapes of the positioning holes 33 and 34 in the front view may be different to each other. The protrusions 43 and 44 are inserted into the positioning holes 33 and 34, whereby positioning is performed between the shade 30 and the shade fixing portion 41 of the support member 40. The protrusions 43 and 44 are inserted into the positioning holes 33 and 34, whereby the screw through hole 32 is disposed at a position corresponding to the screw hole 42. In this state, the screw member 50 can be inserted into the screw hole 42 through the screw through hole 32.
When inserting the screw member 50 into the screw hole 42, the screw member 50 is rotated in a clockwise direction with reference to the screw hole 42 in the front view as illustrated in FIG. 6 etc. described below. Hereinafter, the clockwise direction in which the screw member 50 is rotated is denoted as rotation direction R.
The positioning holes 33 and 34 are larger in dimension than the protrusions 43 and 44 in a second direction (the left-right direction) D2 orthogonal to the first direction D1 in the front view. Therefore, when inserting the protrusions 43 and 44, interference with the inner peripheral portions of the positioning holes 33 and 34 can be avoided. In the second direction D2, a difference S1 between a dimension W2 of the positioning hole 33 and a dimension W1 of the protrusion 43 is a margin when inserting the protrusion 43 into the positioning hole 33. In the second direction D2, a difference S2 between a dimension W4 of the positioning hole 34 and a dimension W3 of the protrusion 44 is a margin when inserting the protrusion 44 into the positioning hole 34.
The positioning hole 33 is disposed at a position shifted, with respect to an upward position in the first direction D1 with reference to the screw through hole 32, in the second direction D2 along the rotation direction in fixing the shade 30 with the screw member 50, by an offset value T1 (S1/2) obtained by dividing the difference S1 between the dimension W1 of the protrusion 43 and the dimension W2 of the positioning hole 33 by 2. That is, the positioning hole 33 is disposed at a position shifted to the left by the offset value T1 with respect to the upward position in the first direction D1 with reference to the screw through hole 32. Further, the positioning hole 34 is disposed at a position shifted, with respect to a downward position in the first direction D1 with reference to the screw through hole 32, in the second direction D2 along the rotation direction R in fixing the shade 30 with the screw member 50, by an offset value T2 (S2/2) obtained by dividing the difference S2 between the dimension W3 of the protrusion 44 and the dimension W4 of the positioning hole 34 by 2. That is, the positioning hole 34 is disposed at a position shifted to the right by the offset value T2 with respect to the downward position in the first direction D1 with reference to the screw through hole 32.
As explained above, the positioning holes 33 and 34 are respectively disposed at the positions shifted, with respect to positions in the first direction D1 with reference to the screw through hole 32, along the rotation direction R, by the offset values T1 and T2(S1/2, S2/2) obtained by dividing the differences S1 and S2 between the dimensions W1 and W3 of the protrusions 43 and 44 and the dimensions W2 and W4 of the positioning holes 33 and 34 by 2. In the present embodiment, the positioning holes 33 and 34 are disposed at positions shifted in the second direction D2 along the rotation direction R.
Next, an example of a fixing method for fixing the shade 30 to the shade fixing portion 41 of the support member 40 when manufacturing the vehicle lamp 100 configured as explained above is explained. FIG. 5 and FIG. 6 are diagrams illustrating a state in which the shade 30 is fixed to the shade fixing portion 41. As illustrated in FIG. 5, the protrusion 43 is inserted into the positioning hole 33 and the protrusion 44 is inserted into the positioning hole 34. The protrusions 43 and 44 are inserted into the positioning holes 33 and 34, whereby positioning is performed between the shade 30 and the shade fixing portion 41 of the support member 40. The protrusions 43 and 44 are inserted into the positioning holes 33 and 34, whereby the screw through hole 32 is disposed at a position corresponding to the screw hole 42. For this reason, the screw member 50 can be inserted into the screw hole 42 through the screw through hole 32.
After the shade 30 is positioned, as illustrated in FIG. 6, the screw member 50 is inserted into the screw hole 42 to fix the shade 30 to the shade fixing portion 41. When inserting the screw member 50, as illustrated in FIG. 6, the screw member 50 is rotated in the rotation direction R, which is the clockwise direction with reference to the screw hole 42 in the front view.
When the shade 30 is fixed to the shade fixing portion 41 while the screw member 50 being rotated, the torque of the screw member 50 is transmitted to the shade 30 and the shade 30 rotates in the rotation direction R. When the shade 30 rotates, the shade 30 changes from a state of being positioned to a state of being inclined in the rotation direction R. The inner peripheral surfaces of the positioning holes 33 and 34 are respectively brought into contact with the protrusions 43 and 44, whereby the rotation of the shade 30 is restricted. Specifically, a right inner peripheral portion 33a of the positioning hole 33 is brought into contact with the protrusion 43 and a left inner peripheral portion 34a of the positioning hole 34 is brought into contact with the protrusion 44. Therefore, the shade 30 is fixed to the shade fixing portion 41 in a state in which the inner peripheral surfaces of the positioning holes 33 and 34 are in contact with the protrusions 43 and 44.
In the present embodiment, the positioning holes 33 and 34 are respectively disposed at the positions shifted, with respect to the positions in the first direction D1 with reference to the screw through hole 32, along the rotation direction R, by the offset values T1 and T2 (S1/2, S2/2) obtained by dividing the differences S1 and S2 between the dimensions W1 and W3 of the protrusions 43 and 44 and the dimensions W2 and W4 of the positioning holes 33 and 34 by 2. For this reason, in a state in which the inner peripheral surfaces of the positioning holes 33 and 34 are in contact with the protrusions 43 and 44, the shade 30 is fixed at an appropriate position, that is, at a position where the horizontal portion 31a is parallel to the horizontal direction. As explained above, by setting shift amounts of the positioning holes 33 and 34 in the rotation direction R such that the shade 30 is fixed at the appropriate position, it is possible to suppress unintended positional deviation of the shade 30 due to the rotation of the screw member 50.
As explained above, the vehicle lamp according to the present embodiment includes: the light source unit 10; the optical system 20 that irradiates the front of the vehicle with the light from the light source unit 10; the shade 30 that blocks a part of the light guided by the optical system 20; and the support member 40 that supports the light source unit 10, the optical system 20, and the shade 30. At least one optical component 60 among the light source unit 10, the shade 30, and the optical system 20 is fixed to the support member 40 with the one screw member 50. The support member 40 includes: the screw hole 42 into which the screw member 50 is inserted; and the two protrusions 43 and 44 that are disposed at the positions across the screw hole 42 and that position the optical component 60. The optical component 60 includes: the screw through hole 32 through which the screw member 50 passes; and the positioning holes 33 and 34 that are disposed at the positions across the screw through hole 32 and into which the two protrusions 43 and 44 are inserted. The screw hole 42 and the two protrusions 43 and 44 are aligned in the first direction D1 along the straight line. The two positioning holes 33 and 34 respectively have the diameters larger than the diameters of the protrusions 43 and 44 and are disposed at positions shifted, with respect to the positions in the first direction D1 with reference to the screw through hole 32, by predetermined offset values along the rotation direction in fixing the screw member 50.
With this configuration, the positioning holes 33 and 34 are respectively disposed at the positions shifted, with respect to positions in the first direction D1 with reference to the screw through hole 32, along the rotation direction R, by the offset values T1 and T2(S1/2, S2/2) obtained by dividing the differences S1 and S2 between the dimensions W1 and W3 of the protrusions 43 and 44 and the dimensions W2 and W4 of the positioning holes 33 and 34 by 2. For this reason, when fixing the optical component 60 to the support member 40 while the one screw member 50 being rotated in the rotation direction R, the optical component 60 is fixed at an appropriate position in a state in which the inner peripheral surfaces of the positioning holes 33 and 34 are in contact with the protrusions 43 and 44 and the rotation is restricted. Accordingly, it is possible to suppress positional deviation when fixing the optical component 60 with the screw member 50.
In the vehicle lamp 100 according to the present embodiment, the offset values are values obtained by dividing the differences between the dimensions of the protrusions 43 and 44 and the dimensions of the positioning holes 33 and 34 in the second direction D2 orthogonal to the first direction D1 by 2. With this configuration, it is possible to increase the position accuracy of the optical component 60 in a state of being fixed with the screw member 50.
In the vehicle lamp 100 according to the present embodiment, the positioning holes 33 and 34 are respectively disposed at the positions shifted in the second direction D2 with respect to the positions in the first direction D1 with reference to the screw through hole 32. With this configuration, it is possible to increase the position accuracy of the optical component 60 in a state of being fixed by the screw member 50.
In the vehicle lamp 100 according to the present embodiment, the screw hole 42 and the two protrusions 43 and 44 are aligned in the up-down direction in the vehicle mounted state. Accordingly, in the vehicle lamp 100 having a configuration in which the screw hole 42 and the two protrusions 43 and 44 are aligned in the up-down direction in the vehicle mounted state, the shade 30 can be accurately fixed to the support member 40 by rotating the one screw member 50.
In the vehicle lamp 100 according to the present embodiment, the two positioning holes 33 and 34 have an elongated hole shape extending in the up-down direction. Since the shade 30 forms a cutoff line of a low beam pattern with the horizontal portion 31a and the inclined portion 31b of the upper end edge, the position of the upper end edge in the up-down direction is important. That is, if the shade 30 is disposed to be shifted in the up-down direction from a proper position, for example, the shade 30 allows unnecessary light to pass and/or blocks necessary light. In the present embodiment, since the two positioning holes 33 and 34 of the shade 30 have an elongated hole shape extending in the up-down direction, the position can be adjusted in the up-down direction along the positioning holes 33 and 34 after the shade 30 is disposed in the shade fixing portion 41. By positioning the shade 30 in the up-down direction and then fixing the shade 30 with the screw member 50, it is possible to bring the position and the posture of the horizontal portion 31a and the inclined portion 31b of the shade 30 in the up-down direction into appropriate states.
In the vehicle lamp 100 according to the present embodiment, the optical component 60 is the shade 30. With this configuration, the shade 30 is fixed at an original position, that is, a position where the horizontal portion 31a is parallel to the horizontal direction. Therefore, by rotating the one screw member 50, the shade 30 can be accurately fixed to the support member 40. Accordingly, it is possible to suppress positional deviation when the shade 30, which is an optical component, is fixed by the screw member 50.

[Second Embodiment]

FIG. 7 is an exploded perspective view illustrating an example of a vehicle lamp 200 according to a second embodiment. The vehicle lamp 200 illustrated in FIG. 2 includes a light source unit 110, an optical system 120, a shade 130, and a support member 140. Like the vehicle lamp 100, the vehicle lamp 200 forms a low beam pattern, for example, in the front of a vehicle. Configurations of the light source unit 110 and the optical system 120 are the same as the configurations of the light source unit 10 and the optical system 20 of the vehicle lamp 100.
The support member 140 includes a shade fixing portion 141. The shade fixing portion 141 is provided at a front portion of the support member 140 to fix the shade 130. FIG. 8 is a diagram illustrating an example of the shade fixing portion 141 in the front view. As illustrated in FIG. 8, the shade fixing portion 141 includes a screw hole 142 and protrusions 143 and 144. The screw hole 142 extends rearward. The protrusions 143 and 144 extend forward.
In the present embodiment, the screw hole 142 and the two protrusions 143 and 144 are aligned in a first direction D3 along a straight line. In the present embodiment, the first direction D3 is a direction parallel to the left-right direction. That is, the protrusion 143 is disposed on the left of the screw hole 142 and the protrusion 144 is disposed on the right of the screw hole 142. The distance between the screw hole 142 and the protrusion 143 and the distance between the screw hole 142 and the protrusion 144 are equal to each other.
FIG. 9 is a diagram illustrating an example of the shade 130 in the front view. As illustrated in FIG. 9, as in the first embodiment, the shade 130 includes, for example, a horizontal portion 131a for forming a horizontal cutoff line of a low beam pattern and an inclined portion 131b for forming an oblique cutoff line. The shade 130 includes a screw through hole 132 and two positioning holes 133 and 134.
The screw through hole 132 allows the screw member 50 to pass through when fixing the shade 130 to the support member 140.
The two positioning holes 133 and 134 are disposed at positions across the screw through hole 132. In the present embodiment, the screw through hole 132 and the two positioning holes 133 and 134 are disposed along a straight line parallel to the horizontal portion 131a in the front view. The positioning hole 133 has, for example, a circular shape in the front view. The protrusion 143 explained above is inserted into the positioning hole 133. The positioning hole 134 has, for example, an oval shape in the front view. The protrusion 144 explained above is inserted into the positioning hole. The shapes of the positioning holes 133 and 134 in the front view may be the same.
As in the first embodiment, the protrusions 143 and 144 are inserted into the positioning holes 133 and 134, whereby positioning is performed between the shade 130 and the shade fixing portion 141 of the support member 140. The protrusions 143 and 144 are inserted into the positioning holes 133 and 134, whereby the screw through hole 132 is disposed at a position corresponding to the screw hole 142. In this state, the screw member 50 can be inserted into the screw hole 142 through the screw through hole 132. When inserting the screw member 50 into the screw hole 142, the screw member 50 is rotated in the rotation direction R.
A dimension W6 of the positioning hole 133 is larger than a dimension W5 of the protrusion 143 in a second direction (the up-down direction) D4 orthogonal to the first direction D3 in the front view. A difference S3 between the dimension W6 of the positioning hole 133 and the dimension W5 of the protrusion 143 is a margin when inserting the protrusion 143 is inserted into the positioning hole 133. A dimension W8 of the positioning hole 134 is larger than a dimension W7 of the protrusion 144. A difference S4 between the dimension W8 of the positioning hole 134 and the dimension W7 of the protrusion 144 is a margin when inserting the protrusion 144 into the positioning hole 134.
The positioning hole 133 is disposed at a position shifted, with respect to a position on the left in the first direction D3 with reference to the screw through hole 132, in the second direction D4 along the rotation direction R in fixing the shade 130 with the screw member 50, by an offset value T3 (S3/2) obtained by dividing the difference S3 between the dimension W5 of the protrusion 143 and the dimension W6 of the positioning hole 133 by 2. That is, the positioning hole 133 is disposed at a position shifted downward by the offset value T3 with respect to the position on the left in the first direction D3 with reference to the screw through hole 132. The positioning hole 134 is disposed at a position shifted in the second direction D4 along the rotation direction R in fixing the shade 130 with the screw member 50, by an offset value T4 (S4/2) obtained by dividing the difference S4 between the dimension W7 of the protrusion 144 and the dimension W8 of the positioning hole 134 by 2 with respect to a position on the right in the first direction D3 with reference to the screw through hole 132. That is, the positioning hole 134 is disposed at a position shifted upward by the offset value T4 with respect to the position on the right in the first direction D3 with reference to the screw through hole 132.
As explained above, the positioning holes 133 and 134 are respectively disposed at the positions shifted, with respect to positions in the first direction D3 with reference to the screw through hole 132, along the rotation direction R, by the offset values T3 and T4 (S3/2, S4/2) obtained by dividing the differences S3 and S4 between the dimensions W5 and W7 of the protrusions 143 and 144 and the dimensions W6 and W8 of the positioning holes 133 and 134 by 2. In the present embodiment, the positioning holes 133 and 134 are disposed at the positions shifted in the second direction D2 along the rotation direction R.
FIG. 10 and FIG. 11 are diagrams illustrating a state in which the shade 130 is fixed to the shade fixing portion 141 according to the second embodiment. As illustrated in FIG. 10, the protrusion 143 is inserted into the positioning hole 133 and the protrusion 144 is inserted into the positioning hole 134. The protrusions 143 and 144 are inserted into the positioning holes 133 and 134, whereby positioning is performed between the shade 130 and the shade fixing portion 141 of the support member 140. The protrusions 143 and 144 are inserted into the positioning holes 133 and 134, whereby the screw through hole 132 is disposed at a position corresponding to the screw hole 142. For this reason, the screw member 50 can be inserted into the screw hole 142 through the screw through hole 132.
After the shade 130 is positioned, as illustrated in FIG. 11, the screw member 50 is inserted into the screw hole 142 to fix the shade 130 to the shade fixing portion 141. When inserting the screw member 50, as illustrated in FIG. 11, the screw member 50 is rotated in the rotation direction R.
When the shade 130 is fixed to the shade fixing portion 141 while the screw member 50 being rotated, the torque of the screw member 50 is transmitted to the shade 130 and the shade 130 rotates in the rotation direction R. When the shade 130 rotates, the shade 130 changes from a state of being positioned to a state of being inclined in the rotation direction R. The inner peripheral surfaces of the positioning holes 133 and 134 are respectively brought into contact with the protrusions 143 and 144, whereby the rotation of the shade 30 is restricted. Specifically, an upper inner peripheral portion 133a of the positioning hole 133 is brought into contact with the protrusion 143 and a lower inner peripheral portion 134a of the positioning hole 134 is brought into contact with the protrusion 144. Therefore, the shade 130 is fixed to the shade fixing portion 141 in a state in which the inner peripheral surfaces of the positioning holes 133 and 134 are in contact with the protrusions 143 and 144.
In the present embodiment, the positioning holes 133 and 134 are respectively disposed at the positions shifted, with respect to positions in the first direction D3 with reference to the screw through hole 132, along the rotation direction R, by the offset values T3 and T4 (S3/2, S4/2) obtained by dividing the differences S3 and S4 between the dimensions W5 and W7 of the protrusions 143 and 144 and the dimensions W6 and W8 of the positioning holes 133 and 134 by 2. For this reason, in a state in which the inner peripheral surfaces of the positioning holes 133 and 134 are in contact with the protrusions 143 and 144, the shade 130 is fixed at an appropriate position, that is, at a position where the horizontal portion 131a is parallel to the horizontal direction.
As explained above, even in the case where the screw through hole 132 and the positioning holes 133 and 134 as well as the screw hole 142 and the protrusions 143 and 144 are linearly disposed in the left-right direction, it is possible to suppress unintended positional deviation of the shade 130 due to the rotation of the screw member 50 by setting shift amounts of the positioning holes 133 and 134 in the rotation direction R such that the shade 130 is fixed at an appropriate position.
In the vehicle lamp 200 according to the present embodiment, the screw hole 142 and the two protrusions 143 and 144 are aligned in the left-right direction in the vehicle mounting state. Accordingly, in the vehicle lamp 200 having a configuration in which the screw hole 142 and the two protrusions 143 and 144 are aligned in the left-right direction in the vehicle mounted state, the shade 130 can be accurately fixed to the support member 140 by rotating one screw member 50.
In the vehicle lamp 200 according to the present embodiment, one of the two positioning holes 133 and 134 has an elongated hole shape extending in the left-right direction. With this configuration, since a larger margin is ensured between the two positioning holes 133 and 134 and the two protrusions 143 and 144, the shade 130 and the support member 140 can be finely adjusted in the left-right direction.
The technical scope of the present invention is not limited to the embodiments explained above and can be changed as appropriate without departing from the gist of the present invention. For example, in the embodiment explained above, the shade 30 is explained as an example of the optical component 60. However, the present invention is not limited to this configuration. The optical component 60 can also be applied to a case in which a part or the entire light source unit 10 and optical system 20 are fixed by one screw member in addition to the shade 30 or instead of the shade 30.

EXPLANATION OF REFERENCE NUMBERS

R ROTATION DIRECTION
10, 110 LIGHT SOURCE UNIT
11 LIGHT SOURCE
12 SUBSTRATE
20, 120 OPTICAL SYSTEM
21 REFLECTOR
22 PROJECTION LENS
30, 130 SHADE
31a, 131a HORIZONTAL PORTION
31b INCLINED PORTION
32, 132 SCREW THROUGH HOLE
33, 34, 133, 134 POSITIONING HOLE
40, 140 SUPPORT MEMBER
41, 141 SHADE FIXING PORTION
42, 142 SCREW HOLE
43, 44, 143, 144 PROTRUSION
50 SCREW MEMBER
60 OPTICAL COMPONENT
100, 200 VEHICLE LAMP

Claims

A vehicle lamp comprising:
a light source unit;

an optical system that irradiates a front of a vehicle with light from the light source unit;

a shade that blocks a part of light guided by the optical system; and

a support member that supports the light source unit, the optical system, and the shade, wherein

at least one optical component among the light source unit, the shade, and the optical system is fixed to the support member with one screw member,

the support member includes:
a screw hole into which the screw member is inserted; and

two protrusions that are disposed at positions across the screw hole and that position the optical component,

the optical component includes:
a screw through hole through which the screw member passes; and

positioning holes that are disposed at positions across the screw through hole and into which the two protrusions are inserted,

the screw hole and the two protrusions are aligned in a first direction along a straight line, and

the two positioning holes respectively have diameters larger than diameters of the protrusions and are disposed at positions shifted, with respect to positions in the first direction with reference to the screw through hole, by predetermined offset values along a rotation direction in fixing the screw member.
The vehicle lamp according to claim 1, wherein
the offset value is a value obtained by dividing a difference between a dimension of the protrusion and a dimension of the positioning hole in a second direction orthogonal to the first direction by 2.
The vehicle lamp according to claim 2, wherein
the positioning holes are respectively disposed at positions shifted in the second direction, with respect to positions in the first direction with reference to the screw through hole.
The vehicle lamp according to claim 1, wherein
the screw hole and the two protrusions are aligned in an up-down direction in a vehicle mounted state.
The vehicle lamp according to claim 4, wherein
the two positioning holes each have an elongated hole shape extending in the up-down direction.
The vehicle lamp according to claim 1, wherein
the screw hole and the two protrusions are aligned in a left-right direction in a vehicle mounted state.
The vehicle lamp according to claim 6, wherein
one of the two positioning holes has an elongated hole shape extending in the left-right direction.
The vehicle lamp according to claim 1, wherein
the optical component is the shade.