WO2020253442A1

WO2020253442A1 - Vehicle lamp

Info

Publication number: WO2020253442A1
Application number: PCT/CN2020/090835
Authority: WO
Inventors: 付锦江; 蒋焕成; 陈彬; 马勇
Original assignee: 深圳市绎立锐光科技开发有限公司
Priority date: 2019-06-17
Filing date: 2020-05-18
Publication date: 2020-12-24
Also published as: CN112097217A

Abstract

A vehicle lamp (100), comprising a light source (150), a light guide rod (110), an upper light guide rod press plate (123a), and a lower light guide rod press plate (123b). The upper light guide rod press plate (123a) and the lower light guide rod press plate (123b) are used for fixing the light guide rod (110) on an emergent light path of the light source (150), and at least one wired contact is provided between the light guide rod (110) and the upper light guide rod press plate (123a) and the lower light guide rod press plate (123b). By means of the configurations above, on one hand, light emitted by the LED light source (150) is transmitted by the light guide rod (110) and then emitted out to form 360-degree emitted light; and on the other hand, by fixing the light guide rod (110) by implementing a wired contact between the light guide rod (110) and the upper light guide rod press plate (123a) and the lower light guide rod press plate (123b), light rays entering the light guide rod (110) can keep total internal reflection in the light guide rod (110) without the occurrence of light leakage, thereby keeping high luminous efficacy.

Description

A car lamp

Technical field

The present invention relates to the field of automobile lighting, in particular to automobile lights.

Background technique

Existing automobile headlights generally use halogen filaments or xenon metal halide filaments, but their service life is relatively short. With the rapid development of LEDs, automobile headlights gradually shift from halogen lamps and xenon lamps to LED lamps.

At present, the main implementation of LED headlights is to integrate the LED light source on the planes on both sides of a thin substrate. The heat generated by the LED light source is conducted to the radiator through the substrate. The problem is that the output light of the LED headlight is difficult to 360 degrees. Cover, and the LED light source is difficult to dissipate heat. In the subsequent way, the LED light source is arranged at the incident end of a light guide rod, and the light entering from the incident end through the light guide rod is conducted to the exit end of the light guide rod, and the light exits from the exit end to form a 360-degree body luminescence. However, due to the total internal reflection of light in the light guide rod, the outer surface of the light guide rod cannot be covered with silica gel, and it is difficult to fix the light guide rod in the car light.

Summary of the invention

In view of the above-mentioned defects in the prior art, the present invention provides an automobile headlight, comprising: a light source, a light guide rod, a light guide rod upper pressing plate and a light guide rod lower pressing plate, the light guide rod upper pressing plate and the light guide rod lower pressing plate The pressing plate is used to fix the light guide rod on the exit light path of the light source, and there is at least one line contact between the light guide rod and the upper pressing plate of the light guide rod and the lower pressing plate of the light guide rod.

Through the above settings, on the one hand, the light emitted by the LED light source is transmitted through the light guide rod and then emitted to form a 360-degree emitted light; on the other hand, by making the light guide rod and the light guide rod upper pressing plate and the light guide rod lower pressing plate The light guide rod is fixed for line contact, so that the light entering the light guide rod can maintain total internal reflection in the light guide rod without light leakage, and maintain high light efficiency.

In one embodiment, the lower pressing plate of the light guide bar includes a V-shaped or trapezoidal fixed groove, and the light guide bar is placed in the V-shaped or trapezoidal fixed groove.

In one embodiment, the upper pressing plate of the light guide rod includes a square fixing groove, and the light guide rod is placed in the square fixing groove.

In one embodiment, the square fixing groove includes at least one elastic piece, and the elastic piece is in line contact with the light guide rod.

In one embodiment, the square fixing groove includes at least one elastic component, the elastic component includes an elastic gasket and a metal sheet, one side of the elastic gasket is connected to the square fixing groove, the elastic The other side of the gasket is connected with the metal sheet, and the metal sheet is in line contact with the light guide rod.

In one embodiment, the upper pressing plate of the light guide rod and the lower pressing plate of the light guide rod are connected by screw locking.

In one embodiment, the automobile lamp further includes a sleeve ring, which is sleeved on the upper pressing plate of the light guide rod and the lower pressing plate of the light guide rod, for making the light guide rod The pressing plate is attached to the lower pressing plate of the light guide rod.

In one embodiment, the automobile lamp further includes a radiator, the light source is arranged on the radiator, and one end of the upper pressing plate of the light guide rod and the lower pressing plate of the light guide rod are fixed to the radiator on.

In one embodiment, the light guide rod includes a light incident surface, a light emitting surface, and a light guide portion connecting the light incident surface and the light emitting surface, and the light source is disposed on the light incident surface of the light guide rod. On the other hand, the light guide portion has at least one line contact with the upper pressure plate of the light guide rod and the lower pressure plate of the light guide rod.

In one embodiment, the automobile lamp further includes a chuck, the chuck includes at least one protrusion, and the light guide bar upper pressing plate and the light guide bar lower pressing plate include at least one guide groove and one groove The guide groove is provided corresponding to the protrusion, and the protrusion is guided into the groove through the guide groove and is limited in the groove.

Compared with the prior art, the present invention includes the following beneficial effects: the light emitted from the light source is guided into the light guide rod, and then emitted after being transmitted through the light guide rod to form 360-degree illumination light; The light guide rod lower pressing plate fixes the light guide rod, and the light guide rod is in line contact with the light guide rod upper pressing plate and the light guide rod lower pressing plate, so that the light entering the light guide rod can maintain total internal reflection in the light guide rod, Make car lights have high luminous efficiency. By fixing the light source on the radiator, the heat dissipation of the light source is enhanced, and the light efficiency of the light source is improved.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of an automobile lamp according to an embodiment of the application;

Figure 2 is an exploded view of a car lamp in an embodiment of the application;

3 is a schematic diagram of the structure of the light source and the light guide rod according to the embodiment of the application

4 is a top view of the upper and lower pressing plates of the light guide rod according to the embodiment of the application;

5 is an enlarged view of the line contact between the upper and lower pressing plates of the light guide rod and the light guide rod in the embodiment of the application;

6 is an exploded view of the upper and lower pressing plates of the light guide rod according to the embodiment of the application;

Fig. 7 is a cross-sectional view of the upper and lower pressing plates of the light guide rod along V-V' in Fig. 4;

FIG. 8 is a top view of the upper and lower pressing plates of another light guide rod according to an embodiment of the application;

9 is another schematic diagram of the structure of the upper pressing plate of the light guide rod according to the embodiment of the application;

10 is a top view of another light guide bar upper and lower pressing plates according to an embodiment of the application;

Fig. 11 is a cross-sectional view of the upper and lower pressing plates of the light guide rod along V-V' in Fig. 10;

FIG. 12 is a schematic structural diagram of a chuck according to an embodiment of the application;

13 is a schematic diagram of the structure of the light guide rod and the upper and lower pressing plates of the light guide rod according to an embodiment of the application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of this application, the directional indication is only used to explain that it is in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the relative positional relationship, movement, etc. of the components below will also change the directional indication accordingly.

It should be noted that the line contact mentioned in this application means that two objects are in contact with each other, and the contact surface between the two objects is in the shape of a line.

Please refer to FIGS. 1 and 2. FIG. 1 is a schematic structural diagram of an automobile lamp according to an embodiment of the present application, and FIG. 2 is an exploded view of an automobile lamp according to an embodiment of the present application. The present invention provides an automobile lamp 100, comprising: a light source 150, a light guide rod 110, a light guide rod upper pressing plate 123a and a light guide rod lower pressing plate 123b, wherein the light guide rod upper pressing plate 123a and the light guide rod lower pressing plate 123b are used for The light guide rod 110 is fixed on the exit light path of the light source 150, and there is at least one line contact between the light guide rod 110 and the light guide rod upper pressing plate 123a and the light guide rod lower pressing plate 123b.

Through the above settings, on the one hand, the light emitted by the light source is guided into the light guide rod and then emitted to form a 360-degree illuminating light. On the other hand, the light guide rod upper pressing plate 123a and light guide lower pressing plate 123b make the light emitted from the light source 150 enter After reaching the light guide rod 110, the total internal reflection can be maintained in the light guide rod 110, the light loss is small, and the light efficiency is high.

The light source 150 is at least one of an LED light source or a laser light source, and the light source 110 is composed of at least one LED light source or a laser light source. The light source 150 is disposed on the PCB substrate 151. The light guide rod 110 is made of a material with good light permeability, such as PMMA, quartz, glass, sapphire, YAG single crystal, and the like. As shown in FIG. 3, the light guide rod 110 includes a light incident surface 111, a light emitting surface 112, and a light guide portion 113 connecting the light incident surface and the light emitting surface. The light emitted from the light source 150 enters the light guide from the light incident surface 111 of the light guide rod 110. The light rod 110 is transmitted from the light-emitting surface 112 to the outside after being conducted by the light guide portion 113. In this embodiment, the light-emitting surface 112 of the light guide rod 110 does not have rotational symmetry; in other specific application scenarios, the light guide rod The light-emitting surface of 110 may have rotational symmetry.

The light guide bar upper pressing plate 123a and the light guide bar lower pressing plate 123b are made of metal materials, such as aluminum, aluminum alloy or titanium alloy, etc., as shown in FIG. 2, the light guide bar upper pressing plate 123a includes a first screw hole 124a and The second screw hole 124b perpendicular to the direction of the first screw hole 124a, wherein the first screw hole 124a is provided on the cylindrical surface of the light guide bar upper pressing plate 123a and the light guide bar lower pressing plate 123b, the light guide bar upper pressing plate 123a and the light guide bar The light bar lower pressing plate 123b can be screwed through the screw hole 124a. In order to further strengthen the bonding of the upper pressing plate 123a of the light guide rod and the lower pressing plate 123b of the light guide rod, and strengthen the fixing effect on the light guide rod 110, a set of rings 121 are used to set the pressing plate 123a and the light guide rod on the light guide rod after bonding. Press down the end of the plate 123b. In this embodiment, the upper pressing plate 123a of the light guide rod and the lower pressing plate 123b of the light guide rod are mainly in contact with the light guide portion 113 of the light guide rod 110, and play the role of fixing the light guide rod 110 without affecting the light guide rod 110. The luminous effect of the luminous surface 112.

Please refer to FIGS. 4-7. FIG. 4 is a top view of the upper and lower pressing plates of the light guide rod according to the embodiment of the application. FIG. 5 is an enlarged view of the line contact between the upper and lower pressing plates of the light guide rod and the light guide rod. The exploded view of the pressing plate, FIG. 7 is a cross-sectional view of the upper and lower pressing plates of the light guide rod along the line V-V' in FIG. 4. The upper pressing plate 123a of the light guide bar includes a square fixing groove 123S, the lower pressing plate 123b of the light guide bar includes a V-shaped fixing groove 123V, and the light guide bar 110 is placed in the space enclosed by the square fixing groove 123S and the V-shaped fixing groove 123V; There is line contact between the light rod 110 and the square fixing groove (shown by the dashed circle L1 in Figure 4), that is, there is line contact between the light guide rod 110 and the upper pressing plate 123a of the light guide rod; the light guide rod 110 and the V-shaped fixing groove There is line contact between them (shown by the dotted circles of L2 and L3 in FIG. 4), that is, there is line contact between the light guide rod 110 and the light guide rod lower pressing plate 123b. In this embodiment, there are three line contacts between the light guide rod 110 and the upper pressure plate 123a of the light guide rod and the lower pressure plate 123b of the light guide rod. In other practical applications, it may also be four, five or other times. Line contact is not limited. In other applications, the light guide bar lower pressing plate 123b may include a trapezoidal fixing groove.

When the light guide bar upper pressing plate 123a and the light guide bar lower pressing plate 123b are locked with screws through the first screw hole 124a, the light guide bar upper pressing plate 123a and the light guide bar lower pressing plate 123b are tightly attached with a gap between the two At this time, the upper pressure plate 123a of the light guide rod and the lower pressure plate 123b of the light guide rod are attached to provide radial pressure to the light guide rod 110. Specifically, as shown in FIG. 4, the upper pressure plate 123a of the light guide rod and The light guide rod lower pressing plate 123b is distributed to provide radial pressure to the light guide rod 110 from three directions (shown by the arrow in FIG. 4), that is, the pressure perpendicular to the long axis of the light guide rod, so that the light guide rod 110 and the guide rod There is a certain axial friction between the upper pressing plate 123a of the light rod and the lower pressing plate 123b of the light guide rod, that is, the friction along the long axis of the light guide rod, which prevents the light guide rod 110 from changing position, such as rotation or displacement, thereby causing To fix the light guide rod 110. In other practical applications, the upper pressing plate of the light guide rod and the lower pressing plate of the light guide rod may also be fixedly connected by welding or gluing.

With the above arrangement, the light guide rod 110 is in line contact with the light guide rod upper pressing plate 123a and the light guide rod lower pressing plate 123b through three lines, and between the light guide rod 110 and the light guide rod upper pressing plate 123a and the light guide rod lower pressing plate 123b The small contact area, on the one hand, avoids damaging the condition of total internal reflection of light in the light guide portion 113 of the light guide rod 110; on the other hand, it can make the light guide rod upper pressing plate 123a and light guide rod lower pressing plate 123b provide the light guide rod 110 Sufficient axial friction force prevents the light guide rod 110 from changing position, rotating or shifting.

In addition, since the light guide rod 110 is made of a certain rigid material, such as glass material, and its surface roughness is relatively large; the light guide rod upper pressing plate 123a and the light guide lower pressing plate 123b are also made of certain rigid materials It is made of metal materials, and its surface roughness is also relatively large; as shown in Figure 5, Figure 5 is an enlarged view of the line contact between the upper and lower pressure plates of the light guide rod and the glass rod, even if the two are closely attached The air gap G keeps the condition of total internal reflection on the surface of the pipe rod 110 unchanged due to the existence of the air gap G, so that the light can maintain total internal reflection in the light guide portion 113 of the light guide rod 110 without leaking to the outside. Maintain a high light utilization rate.

In this embodiment, as shown in FIGS. 6 and 7, the light guide bar lower pressing plate 123b further includes a bump structure 125, which is provided on at least part of both sides of the V-shaped fixing groove 123V of the light guide bar lower pressing plate 123b Area, when the light guide bar upper pressing plate 123a and the light guide bar lower pressing plate 123b are attached, the bump structure 125 is placed in the square fixing groove 123S of the light guide bar upper pressing plate 123a, which is beneficial to the light guide bar lower pressing plate 123b and the light guide The alignment and limitation of the pressing plate 123a on the rod does not affect the optical performance of the light guide rod 110.

Please refer to FIG. 8 and FIG. 9. FIG. 8 is a top view of another structure of the upper and lower pressing plate of the light guide rod according to the embodiment of the present application, and FIG. 9 is another schematic diagram of the structure of the upper pressing plate of the light guide rod. The light guide bar lower pressing plate 123b includes a trapezoidal fixing groove 123V', the light guide bar upper pressing plate 123a includes a square fixing groove 123S, and the light guide upper pressing plate 123a also includes at least one elastic piece 126. The elastic piece 126 is a trapezoidal elastic piece. The elastic piece 126 can The same material as the upper pressing plate 123a of the light guide rod, or other metal materials different from the upper pressing plate 123a of the light guide rod; the elastic piece 126 is arranged in the square fixing groove 123S, and the elastic piece 126 can be glued or welded or locked. Position and connect with the square fixed groove 123S. The light guide rod 110 is placed in the space enclosed by the upper pressure plate 123a of the light guide rod and the lower pressure plate 123b of the light guide rod. There is line contact between the trapezoidal fixing grooves. When the light guide bar upper pressing plate 123a and the light guide bar lower pressing plate 123b are in close contact, it provides radial pressure to the light guide bar 110, thereby making the light bar 110 and the light guide bar upper pressing plate 123a and the light guide bar lower pressing plate 123b There is a certain axial friction force between them to prevent the light guide rod 110 from changing position, and play a role in fixing the light guide rod 110.

By arranging at least one elastic sheet 126 in the square fixing groove 123S of the upper pressing plate 123a of the light guide rod, when the automobile lamp 100 is vibrated, the elastic sheet 126 can provide a certain buffer force, so that the light guide rod 110 and the upper pressing plate of the light guide rod The fixing between the 123a and the light guide bar lower pressing plate 123b has higher reliability, and at the same time, the light guide bar 110 can maintain a higher light utilization rate.

Please refer to FIGS. 10 and 11. FIG. 10 is a top view of another structure of the upper and lower pressing plates of the light guide rod according to the embodiment of the application, and FIG. 11 is a cross-sectional view of the upper and lower pressing plates of the light guide rod along the line V-V' in FIG. The light guide bar lower pressing plate 123b includes a V-shaped fixing groove 123V, the light guide bar upper pressing plate 123a includes a square fixing groove 123S, and the light guide bar upper pressing plate 123a further includes at least one elastic component 127, which includes an elastic gasket And a metal sheet, the elastic gasket is made of rubber, silica gel or other elastic materials, one side of the elastic gasket is connected with the square fixing groove 123S of the upper pressing plate 123a of the light guide rod, and the other side is connected with the metal sheet The connection can be fixedly connected by gluing, and the thickness of the metal sheet is about 0.2mm. When the light guide rod 110 is placed in the square fixing groove 123S of the upper pressing plate 123 of the light guide rod, there is a line contact between it and the metal sheet, and there is still an air gap when the two are closely attached, which will not change the guide rod. The condition of total internal reflection of the light rod 110 enables the light to maintain total internal reflection in the light guide portion 113 of the light guide rod 110 without leaking to the outside, and a high light utilization rate is maintained.

When the light guide bar upper pressing plate 123a and the light guide bar lower pressing plate 123b are in close contact, it can provide the light guide bar 110 with radial pressure, thereby making the light bar 110 and the light guide bar upper pressing plate 123a and the light guide bar lower There is a certain axial friction force between the pressing plates 123b, which prevents the light guide rod 110 from changing position and plays a role of fixing the light guide rod 110.

By arranging at least one elastic component 126 in the square fixing groove of the pressing plate 123a on the light guide rod, and the metal sheet in the elastic component 127 is in direct contact with the light guide rod 110, the automobile lamp 100 is made even if it vibrates or has a long time point. When a large amount of heat is generated in the light, since the elastic component has a certain amount of deformation, the fixing between the light guide rod 110 and the light guide rod upper pressing plate 123a and the light guide rod lower pressing plate 123b has higher reliability. At the same time, the light can maintain total internal reflection in the light guide rod 110, there is no light leakage, and high light efficiency is maintained.

Please refer to FIGS. 1 and 2 again. The automobile lamp 100 further includes a radiator 140, and the radiator 140 includes a heat dissipation fin 141 and a fan 142. The light source 150 is arranged on the PCB substrate 151, the PCB substrate 151 is arranged on the heat sink 140, and the PCB substrate 151 is fixed on the heat sink 140 by welding or gluing. If the gluing method is adopted, use a higher thermal conductivity Glue is used for bonding, such as silver glue; if soldering is used, the solder used is gold-tin solder or silver-tin solder. Through the above arrangement, the heat sink 140 can dissipate the heat generated by the light source 150 in time, so that the light source 150 maintains a high light efficiency and prolongs the service life of the light source.

The upper plate 123a of the light guide and the lower plate 123b of the light guide are locked on the heat sink 140 through the second screw holes 124b. The upper plate 123a of the light guide and the lower plate 123b of the light guide are connected to the heat sink 140. , Thereby fixing the light guide rod 110 on the light emitting surface of the light source 150. Through the above arrangement, the car lights 100 are connected as a whole.

The automobile lamp 100 also includes a chuck 130. As shown in FIG. 12, the chuck 30 includes at least one boss 131, which is arranged inside the annular ring of the chuck 130, and can be a prismatic structure or Cylinder structure. In this embodiment, the chuck 30 includes two bosses 131. As shown in FIG. 13, the light guide bar upper pressing plate 123a and the light guide bar lower pressing plate 123b are provided with corresponding guide grooves 131c and grooves. 131d. When the chuck 130 is sleeved on the laminated light guide bar upper pressing plate 123a and light guide bar lower pressing plate 123b, the boss 131 is guided into the groove 131d through the guide groove 131c, and is limited in the groove 131d, so that The chuck 130 is rotatable relative to the attached light guide bar upper pressing plate 123a and light guide bar lower pressing plate 123b. The chuck 130 enables the automobile lamp 100 to be installed on the automobile, which is convenient for matching with other secondary optical elements so as to maximize the automobile lamp light efficiency and realize the illumination spot required for automobile lighting. In this embodiment, a rubber ring 133 is further included, which is used to provide resistance when the chuck 130 rotates, so that the chuck 130 can be fixed at a certain position and remain unchanged.

The present application provides an automobile lamp, comprising a light source, a light guide rod, a light guide rod upper pressing plate and a light guide rod lower pressing plate, the light guide rod upper pressing plate and the light guide rod lower pressing plate are used to transfer the light guide rod The rod is fixed on the exit light path of the light source, and there is at least one line contact between the light guide rod and the upper pressure plate of the light guide rod and the lower pressure plate of the light guide rod.

In this application, by arranging the light source on the radiator, the radiator directly dissipates the light source, which facilitates the heat dissipation of the light source, improves the light efficiency of the light source, and prolongs the service life of the light source.

The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

The above are only the embodiments of the present invention and do not limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the description and drawings of the present invention, or directly or indirectly applied to other related technologies In the same way, all fields are included in the scope of patent protection of the present invention.

Claims

An automobile lamp includes: a light source, a light guide rod, an upper pressure plate of the light guide rod and a lower pressure plate of the light guide rod;

The upper pressure plate of the light guide rod and the lower pressure plate of the light guide rod are used to fix the light guide rod on the exit light path of the light source, and the light guide rod and the upper pressure plate of the light guide rod and the There is at least one line contact between the lower pressing plates of the light guide rod.
The automobile lamp according to claim 1, wherein the lower pressing plate of the light guide rod comprises a V-shaped or trapezoidal fixing groove, and the light guide rod is placed in the V-shaped or trapezoidal fixing groove.
The automobile lamp of claim 1 or 2, wherein the upper pressing plate of the light guide rod comprises a square fixing groove, and the light guide rod is placed in the square fixing groove.
The automobile lamp of claim 3, wherein the square fixing groove comprises at least one elastic piece, and the elastic piece is in line contact with the light guide rod.
The automobile lamp of claim 3, wherein the square fixing groove includes at least one elastic component, and the elastic component includes an elastic gasket and a metal sheet, and one side of the elastic gasket is The square fixing groove is connected, the other side of the elastic gasket is connected with the metal sheet, and the metal sheet is in line contact with the light guide rod.
The automobile lamp of claim 1, wherein the upper pressing plate of the light guide rod and the lower pressing plate of the light guide rod are connected by a screw lock.
The automobile lamp according to claim 6, wherein the automobile lamp further comprises a sleeve ring, the sleeve ring is sleeved on the upper pressing plate of the light guide rod and the lower pressing plate of the light guide rod, It is used to make the upper pressing plate of the light guide rod and the lower pressing plate of the light guide rod fit together.
The automobile lamp of claim 1, wherein the automobile lamp further comprises a radiator, the light source is arranged on the radiator, the upper pressing plate of the light guide rod and the lower part of the light guide rod One end of the pressing plate is fixed on the radiator.
The automobile lamp of claim 1, wherein the light guide rod includes a light incident surface, a light emitting surface, and a light guide portion connecting the light incident surface and the light emitting surface, and the light source is disposed at the On the light incident surface of the light guide rod, the light guide portion has at least one line contact with the upper pressure plate of the light guide rod and the lower pressure plate of the light guide rod.
The automobile lamp of claim 1, wherein the automobile lamp further includes a chuck, the chuck includes at least one bump, the upper pressing plate of the light guide rod and the lower pressing plate of the light guide rod It includes at least one guide groove and one groove, the guide groove is arranged corresponding to the convex block, and the convex block is guided into the groove through the guide groove and is defined in the groove.