WO2023199739A1

WO2023199739A1 - Vehicle lamp

Info

Publication number: WO2023199739A1
Application number: PCT/JP2023/012475
Authority: WO
Inventors: 将志寺本; 修平野末
Original assignee: 株式会社小糸製作所
Priority date: 2022-04-15
Filing date: 2023-03-28
Publication date: 2023-10-19

Abstract

A vehicle lamp comprising: a first member which has a retaining part and a screw-fastening part; a base which has a screw insertion hole, and in which one surface in the thickness direction is formed as an attaching surface and the other surface is formed as a working surface; and a second member retained, by the retaining part, against the attaching surface-side in a light source optical axis direction, wherein an attaching screw screws into the screw-fastening part when inserted into the screw insertion hole from the working surface, and the first member and the second member are attached to the base by means of the attaching screw in a state in which there is a gap between the screw-fastening part and the attaching surface.

Description

Vehicle lights

The present invention relates to the technical field of a vehicular lamp in which a first member and a second member are attached to a base body by screwing.

There is a vehicular lamp configured such that light emitted from a light source is controlled by an optical member such as a shade and irradiated to the outside (see, for example, Patent Document 1). In the vehicular lamp described in Patent Document 1, a plurality of light sources are mounted on a board spaced apart in a predetermined direction, and the light emitted from each light source is controlled by a shade or the like and irradiated to the outside. .

Japanese Patent Application Publication No. 2014-24399

By the way, in the above-mentioned vehicle lamp, an optical member is attached and various members for holding the optical member are provided, so it is necessary to improve the positional accuracy between these members to improve the quality of the light emitted from the light source. It is necessary to ensure a suitable light distribution condition.

Furthermore, when mounting screws are used in the mounting work of each of these members including the optical member, it is desirable that workability in the mounting work be improved.

Therefore, an object of the present invention is to improve the positional accuracy between each member and to improve the workability in the work of attaching each member.

The vehicular lamp according to the present invention is a vehicular lamp that irradiates light emitted from a light source, and includes a first member having a holding part and a screw fixing part, and one member having a screw insertion hole in the thickness direction. A base body having one surface formed as a mounting surface and the other surface formed as a working surface, and a second member pressed toward the mounting surface side in the optical axis direction of the light source by the holding part, and the mounting screw is fixed to the base body. The first member and the second member are inserted into the screw insertion hole from the work surface side and screwed to the screwed part, and the first member and the second member have a gap between the screwed part and the mounting surface. In this state, it is attached to the base body using the attachment screw.

As a result, the first member and the second member are attached to the base body by the attachment screws inserted into the screw insertion holes from the work surface side while the second member is pressed against the attachment surface side by the holding portion.

According to the present invention, the first member and the second member are attached to the base body by the mounting screw inserted into the screw insertion hole from the work surface side while the second member is pressed against the mounting surface side by the holding portion. Since it is attached, it is possible to improve the positional accuracy between the second member and the base body, and it is also possible to improve the workability in the work of attaching the first member and the second member to the base body.

An embodiment of the vehicle lamp of the present invention is shown together with FIGS. 2 to 5, and this figure is a perspective view of the vehicle lamp. FIG. 2 is an exploded perspective view showing the internal structure of the vehicle lamp. FIG. 3 is an exploded perspective view showing the internal structure of the vehicle lamp as seen from a direction different from that shown in FIG. 2. FIG. FIG. 3 is a cross-sectional view schematically showing a state in which the first unit is attached to a heat sink. FIG. 3 is a cross-sectional view schematically showing a state in which the second unit is attached to a heat sink.

Hereinafter, embodiments for implementing the vehicle lamp of the present invention will be described with reference to the accompanying drawings.

In the embodiment shown below, the vehicle lamp of the present invention is applied to a headlamp. However, the present invention can be widely applied to various vehicle lamps other than headlamps.

In the following description, the direction in which light is irradiated to the outside is assumed to be the front, and the front, back, top, bottom, left, and right directions are indicated. However, the directions of front, rear, top, bottom, left and right shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.

The vehicle lamp 1 is, for example, a type that is attached to both the left and right ends of the vehicle body and has a direct optical system that does not have a reflector or the like to reflect light and radiates the light to the outside as direct light. It is a light fixture.

The vehicular lamp 1 has a lamp housing 2 having an opening at the front end and a cover 3 that closes the opening of the lamp housing 2 (see FIG. 1). The lamp housing 2 and the cover 3 constitute a lamp outer casing 4, and the interior space of the lamp outer casing 4 is used as a lamp chamber.

The lamp chamber has a heat sink 5 provided as a base body, a first unit 6 attached to the heat sink 5, and a second unit 7 attached to the heat sink 5 (see FIGS. 1 to 3).

The heat sink 5 is made of a metal material with high thermal conductivity, and includes a mounting surface section 8 facing in the front-rear direction and a plurality of projecting surface sections 9 protruding rearward from both upper and lower ends of the mounting surface section 8, respectively. The heat sink 5 is attached, for example, to a not-illustrated bracket placed in the light chamber by screwing or the like.

For example, two first screw insertion holes 8a are formed in the mounting surface portion 8 so as to be spaced apart from each other in the left and right directions. In the mounting surface portion 8, for example, two first insertion holes 8b are formed spaced apart from each other in the left and right directions, and the first insertion hole 8b is located above the first screw insertion hole 8a. For example, three second screw insertion holes 8c are formed in the mounting surface portion 8. The second screw insertion holes 8c are located, for example, at the upper end of the central portion in the left-right direction and at both left and right ends near the lower end. In the mounting surface portion 8, for example, two second insertion holes 8d are formed at the lower end portion, spaced apart from each other in the left and right directions. For example, two third insertion holes 8e are formed in the mounting surface portion 8 at diagonal ends.

The mounting surface portion 8 has a front surface formed as a mounting surface 10 and a rear surface formed as a work surface 11.

The first unit 6 is attached to the attachment surface 10 of the attachment surface portion 8 by screwing. The first unit 6 is composed of a shade 12, a control lens 13, and a substrate 14. The shade 12 is provided as a first member in the first unit 6, and the control lens 13 is provided as a second member in the first unit 6. The substrate 14 is provided as the third member in the first unit 6.

The shade 12 is formed in a horizontally elongated shape and has a plurality of transmission holes 12a arranged on the left and right. Relief notches 12b are formed at the lower end of both left and right ends of the shade 12, respectively. The relief notch 12b is opened outward and downward in the left-right direction.

First screw fixing portions 15 that protrude rearward are provided at both left and right ends of the shade 12, respectively. The first screw portion 15 is opened rearward and has a threaded groove 15a on its inner peripheral surface. The shade 12 is provided with positioning protrusions 16 that protrude rearward at both left and right ends, respectively. The shade 12 is provided with a plurality of first pressing portions 17 each of which is convex toward the rear. The first holding portions 17 are provided at both left and right ends of the shade 12 and at the center in the left and right direction.

The control lens 13 is formed of a transparent resin material into a horizontally elongated shape, and has a plurality of control portions 13a that are convex toward the front. At both left and right ends of the control lens 13, insertion notches 13b are formed which are open laterally and outward.

Positioning protrusions 18 that protrude rearward are provided at positions near the upper end of both the left and right ends of the control lens 13, respectively. A positioning hole 19 is formed at both left and right ends of the control lens 13 at approximately the center in the vertical direction. A position holding hole 20 is formed at the lower end of both left and right ends of the control lens 13 . The control lens 13 is provided with a plurality of pressing portions 21 each of which is convex toward the rear. For example, four pressing portions 21 are provided and are spaced apart from each other vertically and horizontally.

A surface (rear surface) of the control lens 13 from which the positioning projection 18 and the pressing portion 21 are projected is formed as an opposing surface 13c.

The substrate 14 is formed in a horizontally long shape. Positioning holes 22 are formed at both left and right ends of the substrate 14 . Screw holes 23 are formed at both left and right ends of the substrate 14 , and the screw holes 23 are located below the alignment holes 22 .

A plurality of light sources 24 are mounted on the front surface of the substrate 14, for example, spaced apart from each other left and right. As the light source 24, for example, a light emitting diode (LED) is used. A connector (not shown) is connected to the front surface of the board 14, and the connector is connected via a cable to a control unit (not shown) having a light-on/off circuit. Therefore, the light sources 24 are individually controlled by the on/off circuits.

The second unit 7 is attached to the attachment surface 10 of the attachment surface section 8 by screwing. The second unit 7 is composed of a lens holder 25 and a projection lens 26, the lens holder 25 is provided as a first member in the second unit 7, and the projection lens 26 is provided as a second member in the second unit 7. It is provided.

The lens holder 25 is formed into a horizontally long frame shape and has a horizontally long insertion hole 25a.

The lens holder 25 is provided with, for example, three second screw fixing parts 27 that respectively protrude rearward. The second screw fixing portion 27 is opened rearward and has a threaded groove 27a on its inner peripheral surface. The second screw fixing portions 27 are provided at both left and right ends of the lens holder 25 and at the upper end at the center in the left and right direction. Insertion pins 28 protruding rearward are provided at the lower ends of both left and right ends of the lens holder 25, respectively. The lens holder 25 is provided with four rearwardly convex second holding parts 29 spaced apart from each other vertically and horizontally.

The projection lens 26 is made of a transparent resin material, and includes a lens portion 30 formed in a horizontally elongated substantially rectangular shape and mounting protrusions 31 that protrude rearward from each of the four corners of the lens portion 30. There is.

The projection lens 26 is provided with positioning pins 32 that protrude rearward from the tip surfaces of the two lower mounting protrusions 31, respectively. The projection lens 26 is provided with a plurality of rearwardly convex pressing protrusions 33, respectively. The pressing protrusions 33, for example, respectively protrude rearward from the tip surfaces of the four attached protrusions 31.

In the first unit 6 configured as described above, the shade 12 and the substrate 14 are positioned with respect to the control lens 13 in a direction perpendicular to the optical axis direction.

The positioning of the shade 12 with respect to the control lens 13 is performed by inserting the positioning protrusion 16 of the shade 12 into the positioning hole 19 of the control lens 13 from the front side, and the positioning of the substrate 14 with respect to the control lens 13 is performed by aligning the control lens 13. This is done by inserting the protrusion 18 into the alignment hole 22 of the substrate 14 from the front side. Therefore, in the first unit 6, positioning of the shade 12 and the substrate 14 in a direction perpendicular to the optical axis direction is performed using the control lens 13 as a reference.

The first unit 6 positioned as described above is attached to the heat sink 5 by the first mounting screw 50 with the alignment protrusion 18 of the control lens 13 inserted into the first insertion hole 8b of the heat sink 5 ( (See Figures 2 to 4). When the first unit 6 is attached to the heat sink 5 , the substrate 14 is pressed from the front side by the pressing portion 21 of the control lens 13 and the substrate 14 is pressed against the mounting surface 10 of the heat sink 5 . 17 presses the control lens 13 from the front side and presses the pressing portion 21 against the substrate 14 (see FIG. 4). At this time, the first screwed part 15 of the shade 12 is positioned opposite to the part of the board 14 where the screw hole 23 is formed through the insertion notch 13b of the control lens 13. A gap H1 is created between the front end surface of the substrate 14 and the front surface of the substrate 14. Further, at this time, a gap H2 is created between the opposing surface 13c of the control lens 13 and the mounting surface 10.

In a state where a gap H1 is created between the first screw fixing part 15 and the board 14 and a gap H2 is created between the opposing surface 13c and the mounting surface 10, the first mounting screw 50 is attached to the work surface 11 side (rear side). The first unit 6 is inserted into the first screw insertion hole 8a of the heat sink 5 and the screw hole 23 of the board 14 and screwed into the thread groove 15a of the first screw fixing part 15, so that the first unit 6 is attached to the heat sink 5. . In the vehicular lamp 1, a tapping screw is used as the first mounting screw 50, a screw fastening part without a thread groove is provided as the first screw fastening part 15, and the first mounting screw 50 is a self-tapping screw. may be tapped into the screwed part.

Since the first mounting screw 50 is screwed into the threaded groove 15a with the gap H1 created between the first screwed part 15 and the board 14 in this way, the first holding part 17 of the shade 12 is It is reliably pressed against the control lens 13. Furthermore, since the first mounting screw 50 is screwed into the threaded groove 15a with a gap H2 created between the opposing surface 13c and the mounting surface 10, the pressing portion 21 of the control lens 13 is reliably pressed against the substrate 14. The substrate 14 is reliably pressed against the mounting surface 10 of the heat sink 5.

Therefore, high positional accuracy in the optical axis direction between the shade 12, control lens 13, and substrate 14 is ensured.

Note that the substrate 14 may be attached to the mounting surface 10 of the heat sink 5 using a sheet having thermal conductivity and insulation properties, for example, an adhesive sheet. Since the substrate 14 is attached to the heat sink 5 with a thermally conductive sheet, the heat generated when the light source 24 is turned on is efficiently transferred to the heat sink 5 and released to the outside, thereby increasing the temperature of the light source 24 and the substrate 14. It is possible to suppress this and ensure good operating conditions of the light source 24 and the substrate 14.

Furthermore, the projection lens 26 of the second unit 7 is positioned with respect to the control lens 13 of the first unit 6 in a direction perpendicular to the optical axis direction.

The positioning of the projection lens 26 with respect to the control lens 13 is performed by inserting the positioning pin 32 of the projection lens 26 into the position holding hole 20 of the control lens 13 from the front through the relief notch 12b of the shade 12. Therefore, in the vehicular lamp 1, positioning of the shade 12 and the substrate 14 as well as the projection lens 26 in a direction perpendicular to the optical axis direction is performed using the control lens 13 as a reference.

The projection lens 26 positioned as described above is arranged by inserting the positioning pin 32 into the second insertion hole 8d of the heat sink 5, and inserting the lens part 30 into the insertion hole 25a of the lens holder 25 from the rear side. , is attached to the heat sink 5 together with the lens holder 25 by a second attachment screw 60 (see FIGS. 2, 3, and 5). When the lens holder 25 and the projection lens 26 of the second unit 7 are attached to the heat sink 5, the insertion pin 28 of the lens holder 25 is inserted into the third insertion hole 8e of the heat sink 5, and the second The projection lens 26 is pressed from the front side by the holding part 29, and the pressing protrusion 33 is pressed against the mounting surface 10 of the heat sink 5 (see FIG. 5). At this time, the second screw fixing part 27 of the lens holder 25 is positioned opposite to the part of the heat sink 5 in which the second screw insertion hole 8c is formed, and the tip surface of the second screw fixing part 27 and the heat sink 5 A gap H3 is created between the mounting surface 10 and the mounting surface 10.

With a gap H3 created between the second screw fixing part 27 and the heat sink 5, the second mounting screw 60 is inserted into the second screw insertion hole 8c of the heat sink 5 from the work surface 11 side (rear side). The second unit 7 is attached to the heat sink 5 by being screwed into the threaded groove 27a of the second screw portion 27. In the vehicle lamp 1, a tapping screw is used as the second mounting screw 60, a screw fastening part without a thread groove is provided as the second screw fastening part 27, and the second mounting screw 60 is a self-tapping screw. may be tapped into the screwed part.

Since the second mounting screw 60 is screwed into the threaded groove 27a with the gap H3 created between the second screw fixing part 27 and the heat sink 5, the second holding part 29 of the lens holder 25 is reliably pressed against the projection lens 26. Therefore, high positional accuracy in the optical axis direction between the lens holder 25, the projection lens 26, and the heat sink 5 is ensured.

In the vehicle lamp 1 configured as described above, the light emitted from the light source 24 is controlled by the control unit 13a of the control lens 13, and is controlled to become parallel light by the lens unit 30 of the projection lens 26. is transmitted and irradiated to the outside. At this time, a part of the light is blocked by the shade 12 and is irradiated to the outside with an appropriate light distribution pattern.

Therefore, in the vehicle lamp 1, positional accuracy is particularly important between the four members: the projection lens 26 that controls the light, the control lens 13, the shade 12 that blocks the light, and the board 14 on which the light source 24 is mounted. By ensuring high positional accuracy of these four members, it becomes possible to irradiate light in an appropriate direction with an appropriate light distribution pattern.

As described above, the first mounting screw 50 is inserted into the first screw insertion hole 8a from the work surface 11 side of the heat sink 5 provided as a base body and is screwed into the first screw fixing part 15. In a state where the shade 12 provided as the first member and the control lens 13 provided as the second member have a gap H1 between the first screwed part 15 and the mounting surface 10 of the heat sink 5. It is attached to the heat sink 5 by a first attachment screw 50 .

Therefore, when the control lens 13 is pressed against the mounting surface 10 side by the first holding part 17, the shade 12 is controlled by the first mounting screw 50 inserted into the first screw insertion hole 8a from the work surface 11 side. A lens 13 is attached to the heat sink 5. Thereby, the positional accuracy between the control lens 13 and the heat sink 5 can be improved, and the workability in attaching the shade 12 and the control lens 13 to the heat sink 5 can be improved.

Further, in the second unit 7 of the vehicle lamp 1, the second mounting screw 60 is inserted into the second screw insertion hole 8c from the work surface 11 side of the heat sink 5 provided as a base body. The lens holder 25 provided as the first member and the projection lens 26 provided as the second member are screwed together to the second screwed part 27 and the mounting surface of the second screwed part 27 and the heat sink 5. It is attached to the heat sink 5 with a second attachment screw 60 with a gap H3 between it and the heat sink 10 .

Therefore, when the projection lens 26 is pressed against the mounting surface 10 side by the second holding part 29, the lens holder 25 is attached to the second mounting screw 60 inserted into the second screw insertion hole 8c from the working surface 11 side. The projection lens 26 is attached to the heat sink 5. Thereby, the positional accuracy between the projection lens 26 and the heat sink 5 can be improved, and the workability in attaching the lens holder 25 and the projection lens 26 to the heat sink 5 can be improved.

In particular, in the vehicle lamp 1, the first mounting screw 50 and the second mounting screw 60 are screwed while the first unit 6 and the second unit 7 are positioned on the mounting surface 10 side of the heat sink 5. The first unit 6 and the second unit 7 are attached to the heat sink 5 from the work surface 11 side of the heat sink 5 using the heat sink 5. Therefore, it is possible to perform the installation work of the first unit 6 and the second unit 7 to the heat sink 5 successively from the same direction, and the installation work can be performed easily and quickly, which improves work efficiency in the installation work. It is possible to improve the

Further, in the first unit 6, the control lens 13 provided as the second member is provided with a pressing portion 21 that presses the substrate 14 provided as the third member against the mounting surface 10 in the optical axis direction of the light source 24. The shade 12, control lens 13, and substrate 14 are attached to the heat sink 5 with a gap H2 between the opposing surface 13c of the control lens 13 and the mounting surface 10. Since the shade 12, the control lens 13, and the substrate 14 are attached to the heat sink 5 with the control lens 13 being pressed and the substrate 14 being pressed by the pressing part 21, the optical axis direction of the control lens 13 and the substrate 14 with respect to the heat sink 5 is High positional accuracy can be ensured.

Furthermore, the shade 12 is provided with a positioning protrusion 16 , the control lens 13 is provided with a positioning protrusion 18 , the control lens 13 is provided with a positioning hole 19 into which the positioning protrusion 16 is inserted, and the substrate 14 is provided with a positioning protrusion 16 . An alignment hole 22 into which the alignment protrusion 18 is inserted is formed.

Therefore, since the shade 12 and the substrate 14 are positioned separately with respect to the control lens 13, high positional accuracy of the shade 12 and the substrate 14 with respect to the control lens 13 can be ensured in the direction perpendicular to the optical axis direction.

Further, the control lens 13 that controls the light emitted from the light source 24 is used as the second member, the shade 12 that blocks part of the light controlled by the control lens 13 is used as the first member, and the 3, a substrate 14 on which a light source 24 is mounted is used.

Therefore, since the shade 12 and the substrate 14 are positioned separately on the control lens 13, the positional accuracy of the control lens 13, the shade 12, and the light source 24 in the direction orthogonal to the optical axis direction is improved, and the light emitted from the light source 24 is Appropriate control and shielding can be performed.

In addition, since the control lens 13 is formed with a position holding hole 20 into which the positioning pin 32 of the projection lens 26 is inserted, the substrate 14, shade 12, and projection lens 26 are positioned with respect to the control lens 13, and the optical axis is aligned. High positional accuracy between the control lens 13, the substrate 14, the shade 12, and the projection lens 26 can be ensured in the direction perpendicular to the direction.

In addition, although the example in which the positioning protrusion 16 is provided on the shade 12 and the positioning hole 19 is formed on the control lens 13 is shown above, conversely, the positioning hole is formed on the shade and the positioning protrusion is provided on the control lens. may be provided. Further, although the above example shows that the control lens 13 is provided with the alignment protrusion 18 and the substrate 14 is formed with the alignment hole 22, conversely, the control lens is formed with an alignment hole and the substrate is formed with the alignment hole 22. A mating protrusion may be provided. Further, in the above example, the projection lens 26 is provided with the positioning pin 32 and the control lens 13 is provided with the position holding hole 20, but conversely, the projection lens is provided with a position holding hole and the control lens is provided with the position holding hole 20. A pin may also be provided.

DESCRIPTION OF SYMBOLS 1... Vehicle lamp, 5... Heat sink (base body), 8a... First screw insertion hole, 8c... Second screw insertion hole, 10... Mounting surface, 11... Work surface, 12... Shade (first member) ), 13... Control lens (second member), 14... Substrate (third member), 15... First screw fixing part, 16... Positioning protrusion, 17... First holding part, 18... Positioning Projection, 19... Positioning hole, 20... Position holding hole, 21... Pressing part, 22... Positioning hole, 23... Screw hole, 24... Light source, 25... Lens holder (first member), 26... Projection lens (Second member), 27... Second screw fixing part, 28... Insertion pin, 29... Second holding part, 32... Positioning pin, 50... First mounting screw, 60... Second mounting screw

Claims

A vehicle lamp that emits light emitted from a light source,
a first member having a holding part and a screwing part;
a base body having a screw insertion hole and having one surface in the thickness direction formed as a mounting surface and the other surface formed as a working surface;
a second member pressed toward the mounting surface side in the optical axis direction of the light source by the holding portion;
A mounting screw is inserted into the screw insertion hole from the work surface side and is screwed into the screw fixing part,
A vehicular lamp, wherein the first member and the second member are attached to the base body by the attachment screw with a gap between the screw fixing portion and the attachment surface.
a third member pressed against the mounting surface;
The second member is provided with a pressing portion that presses the third member against the mounting surface in the optical axis direction of the light source,
The vehicle according to claim 1, wherein the first member, the second member, and the third member are attached to the base body with a gap between the second member and the mounting surface. Light equipment.
a positioning protrusion is provided on the first member;
an alignment protrusion is provided on the second member;
A positioning hole into which the positioning protrusion is inserted is formed in the second member,
The vehicular lamp according to claim 2, wherein an alignment hole into which the alignment protrusion is inserted is formed in the third member.
A control lens that controls the light emitted from the light source is used as the second member,
A shade that blocks part of the light controlled by the control lens is used as the first member,
The vehicular lamp according to claim 3, wherein a substrate on which the light source is mounted is used as the third member.
Two of the second members are provided,
A projection lens having a positioning pin is provided as the second member different from the control lens,
The vehicular lamp according to claim 4, wherein a position holding hole into which the positioning pin is inserted is formed in the control lens.