Low beam module, vehicle lamp and vehicle

Abstract

A low-beam module comprises at least two low-beam reflecting bowls, a radiator, a circuit board and a light source, the light source is located on the circuit board, the radiator makes contact with the circuit board, the at least two low-beam reflecting bowls are fixed to the same circuit board, the low-beam reflecting bowls and the circuit board form a semi-closed cavity, and the low-beam reflecting bowls extend forwards by a certain length relative to the circuit board. The light source is located in the semi-closed cavity. The low-beam reflecting bowls and the circuit board form a semi-closed cavity, so that light emitted by the low-beam light source in the 180-degree range at the position of the circuit board can be reflected to the outer lens, finally, the low-beam light pattern correspondingly formed by the multiple low-beam reflecting bowls is a perfect light pattern, redundant light spots do not exist, each reflecting bowl is of an independent semi-surrounding structure, and the light emitting efficiency is improved. Light crosstalk caused by light leakage when a light source in the light reflecting bowl is diverged is avoided, and it is guaranteed that light pattern overlapping does not exist between low beam light patterns formed by the multiple low beam light reflecting bowls.

Description

Technical Field

[0001] The utility model belongs to the field of lighting devices and automobile parts, and in particular relates to a low beam module, a car lamp and a vehicle. Background Art

[0002] With the development of the automobile industry, the shapes of lamps are becoming more and more diverse, and the core part of the headlights is the low beam module. At present, in the design of the high and low beam headlight structure, there is an increasing demand for flat and narrow low beam modules. How to design a simple and economical low beam module while meeting the optical and styling requirements has become the key to winning among many competitors. At the same time, the large number of parts also makes the assembly process more complicated, and the assembly cost is further increased. It can be seen that the performance of products with a large number of parts is greatly affected by the manufacturing and assembly processes, resulting in large fluctuations in product performance and poor manufacturing consistency, which makes the overall quality of the headlights difficult to control.

[0003] The existing flat and narrow lens module has multiple low beam reflective bowls and multiple high beam reflective bowls, and each reflection will form an independent light pattern. For example, the low beam reflective bowl will form a low beam light pattern, and the high beam reflective bowl will form a high beam light pattern. There will be interference between the multiple light patterns, resulting in the failure to form a complete low beam light pattern or high beam light pattern, including the low beam light patterns formed by the low beam reflective bowls, the high beam light patterns formed by the high beam reflective bowls, and the low beam light patterns formed by the low beam reflective bowls and the high beam light patterns formed by the high beam reflective bowls. Therefore, for the lens module with multiple reflective bowls, how to determine the positions relative to each other to prevent the low beam light patterns from being misaligned.

[0004] Chinese patent CN202021488346.8 discloses a dual-light lens based on a free-form surface lens design, including a mounting plate, a base is fixedly provided on one side of the mounting plate, a first high-beam reflective bowl is fixedly provided on the top of the base, a baffle is fixedly provided on the top of the inner cavity of the first high-beam reflective bowl, a second high-beam emitting bowl is fixedly provided on both sides of the mounting plate, a lens body is provided on one side of the mounting plate, and a first high-beam lens is provided on one side of the inner cavity of the lens body. The scheme actually shows a high-beam and low-beam headlight, a reflective bowl and a baffle are provided at the top of the base, and a corresponding low-beam lens is provided on the lens body to achieve high-beam and low-beam irradiation, but only provides a low-beam irradiation method, and does not consider the problem of how to match the light type when irradiating multiple low-beams.

[0005] Chinese patent CN202321867342.4 discloses a vehicle lighting module and a vehicle light, including a circuit board, a light source, a reflective element and a lens; the light source includes a first light source and a second light source, the reflective element includes a first reflective surface and a second reflective surface, and the lens includes a first lens and a second lens; the first light source, the first reflective surface and the first lens form a first optical structure, the first light source and the first reflective surface are arranged along a first direction, the second light source, the second reflective surface and the second lens form a second optical structure, the second light source and the second reflective surface are arranged along the first direction, the first reflective surface and the second reflective surface are arranged along the second direction, the first lens and the second lens are arranged along a third direction, and the first direction and the second direction form an angle. Although a cutoff line structure for forming a light and dark cutoff line is provided on the first reflective surface, the opening of the first reflective surface is arranged downward or upward to form a low beam light type with a low beam cutoff line or a low beam zone III light type, the cutoff line structure and the matching relationship with the reflective surface are not specifically described, and the problem of how to match the light type when multiple low beams are irradiated is not considered. Utility Model Content

[0006] In view of the above-mentioned prior art, the purpose of the present utility model is to provide a low beam module, a headlight and a vehicle.

[0007] The technical solution of the utility model is implemented as follows: a low beam module includes a heat sink, a circuit board and at least two groups of low beam units, the low beam unit includes a low beam reflective bowl, a light source and a light type baffle, the light source is located on the circuit board, the heat sink is in contact with the circuit board, at least two groups of low beam units are fixed on the circuit board, the light type baffle is fixed on the low beam reflective bowl and is located at the front end of the low beam reflective bowl close to the circuit board, so that the low beam unit forms a corresponding light spot with a cut-off line and the heights of the cut-off lines of multiple light spots are within the same preset range.

[0008] The beneficial effect of such a design is that the semi-enclosed cavity formed by the low-beam reflector and the circuit board can make the light diverged in a range of 180 degrees at the position of the circuit board be reflected onto the outer lens, and finally the low-beam light pattern formed by multiple low-beam reflector bowls is just a perfect light pattern, without any redundant light spots. In other words, each low-beam reflector bowl forms a light spot with a cutoff line, and the height of the cutoff lines of multiple light spots is basically maintained within the preset range, and the human eye sees the same light spot. Each reflector bowl is an independent semi-enclosed structure, which will not cause light leakage when the light source in the reflector bowl diverges and cause light crosstalk, ensuring that there is no light pattern overlap between the low-beam light patterns formed by multiple low-beam reflector bowls.

[0009] Furthermore, at least two groups of low beam units are located on the same side of the circuit board, and the areas where the low beam units are located do not overlap. In this way, the light spots formed by the low beam units are in the same vertical dimension. The different heights of the light spots in the horizontal dimension are achieved by shielding the light pattern baffle to achieve light pattern matching of the light spots formed by each low beam unit.

[0010] Furthermore, the low beam reflective bowl is provided with a small limiting protrusion, which contacts the circuit board, thereby reducing the contact area between the low beam reflective bowl and the circuit board and reducing the heat transfer from the circuit board to the low beam reflective bowl.

[0011] Furthermore, both sides of the low beam reflective bowl extend forward to form a clip, and a curved surface matching the low beam reflective bowl is provided on the side of the clip close to the light source, thereby reducing the amount of light leakage from the side, and ultimately the reflected light is more concentrated, reducing excess light.

[0012] Furthermore, a light pattern baffle is provided at the front end of the low beam reflective bowl near the circuit board, and a retaining ring is provided on the light pattern baffle. The retaining ring is protruded at a certain height relative to the circuit board so that the light pattern baffle can block part of the light reflected by the low beam reflective bowl. In this way, the light pattern baffle can block and correct the reflection of the low beam reflective bowl to form a low beam light pattern, similar to forming a semi-elliptical low beam light pattern, so that multiple semi-elliptical low beam light patterns can overlap, and finally form a perfect low beam light pattern without any extra light spots.

[0013] Furthermore, an inclined protrusion is provided at the front end of the low beam reflective bowl, and the light-shaped baffle is spherical or ellipsoidal on the side close to the low beam reflective bowl and can reflect the light reflected by the protrusion. This arrangement can be used to illuminate Zone III, such as roadside head-up signs.

[0014] Furthermore, the low-beam reflector bowl includes a clamping hole, a first positioning column, a second positioning column and a partially raised screw hole. A clamping hook and a first positioning hole are provided on the side of the light-type baffle plate close to the low-beam reflector bowl. The first positioning hole matches the first positioning column. The clamping hook matches the clamping hole to clamp the light-type baffle plate to the low-beam reflector bowl. The second positioning column matches the second positioning hole on the circuit board. The screw passes through the screw hole to fix the low-beam reflector bowl to the circuit board. In this way, the low-beam reflector bowl and the circuit board not only have a smaller contact area, but also can be stably fixed together. Similarly, the low-beam reflector bowl and the light-type baffle plate can also be stably fixed together. The elastic clamping is convenient and quick.

[0015] Furthermore, a heat sink is provided on the radiator, and the heat sink is horizontally extended laterally so that the radiator has a certain rigidity to prevent the circuit board from deforming. Such an arrangement can ensure the relative position between multiple low-beam reflective bowls, making the position of the reflected light more accurate, and ultimately forming a perfect low-beam light pattern without any misalignment.

[0016] A headlight at least comprises the above-mentioned low beam module, and the light of such headlight is more concentrated and perfect.

[0017] A vehicle comprises at least the above-mentioned headlight, so that the lighting effect of the lighting system of the vehicle is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional exploded schematic diagram of a low beam module of the utility model;

[0019] Figure 2 This is a bottom-up schematic diagram of a low-beam reflective bowl of a low-beam module of the utility model;

[0020] Figure 3 This is a schematic diagram of the main view of a low beam reflective bowl of a low beam module of the utility model;

[0021] Figure 4 It is a side schematic diagram of a low beam reflective bowl of a low beam module of the utility model;

[0022] Figure 5 It is a half-section schematic diagram of a low beam reflective bowl of a low beam module of the utility model;

[0023] Figure 6 It is a three-dimensional schematic diagram of a light-type baffle of a low beam module of the utility model;

[0024] Figure 7 This is a top view schematic diagram of a light-type baffle of a low beam module of the utility model;

[0025] Figure 8 This is a side view of a light baffle of a low beam module of the utility model;

[0026] Fig. 9 A schematic diagram showing that the light spot heights of multiple low beam units are inconsistent;

[0027] Fig.10 The figure is a schematic diagram of a light spot generated by a low beam module of the utility model. DETAILED DESCRIPTION

[0028] As required, detailed embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are only exemplary of the present invention, and the present invention may be implemented in different and alternative forms. The drawings are not necessarily drawn to scale, and certain features may be exaggerated or reduced to show the details of specific components. Therefore, the specific structural and functional details disclosed herein should not be understood as having a limiting meaning, but only as a representative basis to teach those skilled in the art to adopt the present invention differently. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a low beam module includes a heat sink 3, a circuit board 2 and at least two groups of low beam units, the low beam unit includes a low beam reflective bowl 1, a light source and a light pattern baffle 5, the light source is located on the circuit board 2, the heat sink 3 is in contact with the circuit board 2, at least two groups of low beam units are fixed on the circuit board 2, the light pattern baffle 5 is fixed on the low beam reflective bowl 1 and is located at the front end of the low beam reflective bowl 1 close to the circuit board 2, so that the low beam unit forms a light spot with a cut-off line and the heights of the cut-off lines of multiple light spots are within the same preset range.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a low beam module includes at least two low beam reflective bowls 1, a heat sink 3, a light-shaped baffle 5, a circuit board 2 and a light source. The light source is located on the circuit board 2, the heat sink 3 is in contact with the circuit board 2, the two low beam reflective bowls 1 are fixed on the same circuit board 2, the low beam reflective bowl 1 and the circuit board 2 form a semi-enclosed cavity, and the low beam reflective bowl 1 extends forward a certain length relative to the circuit board 2, and the light source is located in the semi-enclosed cavity. The low beam reflective bowl 1 is set independently to a more accurate position, which can avoid multiple low beam reflective bowls 1 being far apart. If an integrated structure is used, the material may shrink and deform during molding, causing uncertainty in the relative positions of multiple low beam reflective bowls 1. The low beam reflective bowl 1 and the light-shaped baffle 5 are made of polycarbonate, polymethyl methacrylate or other transparent resin materials, generally by injection molding, preferably transparent silicone material. Transparent silicone has high temperature resistance, is not easy to yellow after long-term light exposure, and is soft in material, can be installed at a close distance from the light source, and has high light efficiency. The inner wall 11 of the low-beam reflector 1 is a reflective surface that is approximately a quarter of an ellipsoid. The ellipsoid has two foci, and the low-beam reflector 1 is arranged above the light source so that the light source is located at a focus of the low-beam reflector 1. In this way, the brightness of the light can be maximized and the light intensity can be fully utilized. Each low-beam module includes an LED light source, a reflector, a radiator, a PCB board, a light-pattern baffle, a bracket (not shown in the figure), and an outer lens (not shown in the figure). When assembling these six components, certain tolerances will be generated, of which the radiator has little effect. Each low-beam unit will generate a low-beam light pattern. Therefore, when a plurality of low-beam modules are included in the headlight system, a plurality of low-beam light patterns will be generated. When the relevant six components in the plurality of low-beam modules are assembled, if the tolerance is large, the final low-beam light pattern will be affected. In the present application, multiple low-beam light sources are assembled on the same PCB board, which can ensure that the light output tolerance is reduced to a certain extent, and the direct assembly of the reflector and the light-pattern baffle also reduces the tolerance to a certain extent.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the low beam reflective bowl 1 is provided with a small limiting protrusion 19, which is in contact with the circuit board 2. Generally, the light source adopts a light emitting diode, which will generate a lot of heat on the circuit board 2. The temperature of the circuit board 2 is relatively high. Minimizing the contact with the circuit board 2 can extend the service life of the low beam reflective bowl 1.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, both sides of the low-beam reflector bowl 1 extend forward to form a buckle 14 , and a side of the buckle 14 close to the light source is provided with a curved surface matching the low-beam reflector bowl 1 .

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a handle 13 is provided at the rear end of the low beam reflector bowl 1. The handle 13 has an L-shaped cross section and extends obliquely toward the side away from the circuit board 2. The handle 13 is used to improve positioning accuracy and can be used for foolproofing, engraving characters, engraving QR codes, etc.

[0034] like Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, a light-shaped baffle 5 is provided at the front end of the low-beam reflective bowl 1 near the circuit board 2, and a retaining ring 51 is provided on the light-shaped baffle 5. The retaining ring 51 is raised relative to the circuit board 2 to a certain height so that the light-shaped baffle 5 can block part of the light reflected by the low-beam reflective bowl 1. A small boss 52 and a semi-convex ring 53 are raised on the side of the light-shaped baffle 5 near the low-beam reflective bowl 1, which can reduce the contact area between the low-beam reflective bowl 1 and the light-shaped baffle 5 and reduce heat transfer. The light-shaped baffle 5 includes a reflective portion 56 and a mounting portion 57. The reflective portion 56 and the mounting portion 57 are tilted at a certain angle, and the retaining ring 51 is located on the reflective portion 56.

[0035] like Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8As shown, the front end of the low beam reflector 1 is provided with an inclined protrusion 12, and the light type baffle 5 is spherical or ellipsoidal on the side close to the low beam reflector 1 and can reflect the light reflected by the protrusion 12. The light type baffle 5 can be a round bowl structure of one eighth of a sphere, which is buckled with the low beam reflector 1. The light is reflected by the low beam, and forms a horizontal cut-off light with the light type baffle 5. After being refracted by the optical surface of the lens assembly, the horizontal part of the cut-off line required by the regulations is formed, so that the emitted light forms a light band with a clear light-dark dividing line on the wall, which meets the regulations on the projection range of the low beam.

[0036] like Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, the low-beam reflector 1 includes a clamping hole 15, a first positioning column 16, a second positioning column 17 and a partially protruding screw hole 18. The clamping hole 15, the first positioning column 16, the second positioning column 17 and the partially protruding screw hole 18 are all arranged in pairs, so that the force stability on both sides is better. The clamping hole 15 is located at the buckle 14, and a hook 54 and a first positioning hole 55 are provided on the side of the light-shaped baffle 5 close to the low-beam reflector 1. The first positioning hole 55 matches the first positioning column 16. The clamping hook matches the clamping hole 15 to clamp the light-shaped baffle 5 to the low-beam reflector 1. The second positioning column 17 matches the second positioning hole on the circuit board 2. The screw 4 passes through the screw hole 18 to fix the low-beam reflector 1 to the circuit board 2.

[0037] like Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, the heat sink 3 is provided with a heat sink 31, and the heat sink 31 is horizontally extended so that the heat sink 3 has a certain rigidity to prevent the circuit board 2 from deforming. The heat sink 3 is fixed on the bracket 4, and the bracket 4 can be fixed to other components.

[0038] A vehicle lamp comprises at least the above-mentioned low beam module, and a high beam reflector bowl can also be installed simultaneously to realize the same module for high and low beams.

[0039] A vehicle comprises at least the above-mentioned vehicle lamp.

Claims

1. A low beam module, comprising a heat sink (3), a circuit board (2) and at least two low beam units, the low beam units comprising a low beam reflector (1), a light source and a light-shaped baffle (5), the light source being located on the circuit board (2), the heat sink (3) being in contact with the circuit board (2), characterized in that: At least two groups of low-beam units are fixed on the circuit board (2), and the light-shaped baffle (5) is fixed on the low-beam reflective bowl (1) and is located at the front end of the low-beam reflective bowl (1) close to the circuit board (2), so that the low-beam unit forms a corresponding light spot with a cut-off line and the heights of the cut-off lines of the multiple light spots are within the same preset range.

2. The low beam module according to claim 1, characterized in that: At least two groups of the low beam units are located on the same side of the circuit board (2), and the areas where the low beam units are located do not overlap.

3. The low beam module according to claim 1, characterized in that: Both sides of the low-beam reflective bowl (1) extend forward to form a buckle (14), and a side of the buckle (14) close to the light source is provided with a curved surface matching the low-beam reflective bowl (1).

4. The low beam module according to any one of claims 1 to 3, characterized in that: The light-shaped baffle (5) is provided with a retaining ring (51), and the retaining ring (51) is raised to a certain height relative to the circuit board (2) so that the light-shaped baffle (5) can block part of the light reflected by the low-beam reflective bowl (1).

5. The low beam module according to claim 4, characterized in that: The front end of the low-beam reflective bowl (1) is provided with an inclined protrusion (12), and the light-shaped baffle (5) is spherical or ellipsoidal on a side close to the low-beam reflective bowl (1) and can reflect light reflected by the protrusion (12).

6. The low beam module according to claim 5, characterized in that: The low-beam reflective bowl (1) is engaged with the hook (54) of the light-shaped baffle (5) via a clamping hole (15), and the low-beam reflective bowl (1) is fixed to the circuit board (2) via a screw (4).

7. The low beam module according to claim 1, characterized in that: The low beam reflective bowl is provided with a small limiting protrusion (19), and the small limiting protrusion (19) is in contact with the circuit board (2).

8. The low beam module according to claim 1, characterized in that: The heat sink (3) is provided with a heat sink (31), and the heat sink (31) is arranged to extend horizontally so that the heat sink (3) has a certain rigidity to prevent the circuit board (2) from being deformed.

9. A vehicle lamp, characterized in that: At least comprising the low beam module described in any one of claims 1-8.

10. A vehicle, characterized in that: At least comprising the vehicle light as claimed in claim 9.

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