Low beam distribution structure for motor vehicles

Abstract

Low beam distribution structure for motor vehicles, for configuring light beams emitted by light sources to form a low beam pattern, wherein the light sources are formed by at least two successively arranged light sources, and the low beam distribution structure for motor vehicles comprises: a first inner lens (1), the first optical inlet ends (101) which correspond numerically to the light sources and receive the light beams emitted by the light sources, and first optical outlet ends (102) for exiting the light beams from the first inner lens (1), wherein at least two of the first optical inlet ends (101) are configured in two groups, the first group being configured for collimated transmission of the received light beams and the second group being configured for converged transmission of the received light beams.and wherein the first optical exit ends (102) are configured to form a light-dark boundary in the transmitted light rays; a second inner lens (2) arranged downstream of the first inner lens (1) in the beam path to converge the transmitted light rays, comprising the second optical entry end (201) for receiving the transmitted light rays and second optical exit ends (202) for the exit of the light rays from the second inner lens (2); an outer lens (3) arranged downstream of the second inner lens (2) in the beam path, comprising third optical entry ends (3021) for receiving the transmitted light rays and third optical exit ends (3022) for the exit of the light rays from the outer lens (3), wherein the first optical exit ends (102) form a planar first light exit surface of the first inner lens (1),and in the installed position of the low beam distribution structure below the first light emission surface, a recess is formed between the first inner lens (1) and the second inner lens (2) due to a chamfer of the first inner lens (1), wherein the focal point of the light rays entering the first optical entry points (101) for convergent transmission lies on a lower contour line (103) of the first light emission surface, wherein the contour line (103) is a boundary line between the first light emission surface and the recess, and the first inner lens (1) generates a preliminary light pattern with a light-dark boundary contour due to the formation of the contour line (103).

Description

AREA OF TECHNOLOGY

[0001] The present invention relates to the technical field of motor vehicle lamps, in particular to a low beam distribution structure for motor vehicles. BACKGROUND

[0002] With the development of light sources for automotive lamps, the light distribution structures of these lamps have also evolved rapidly, from halogen lamps in the early stages to xenon lamps later on, and finally to LED and laser light sources. This has led to increasingly intelligent and diverse designs for automotive lamps. Among the various types of light sources for automotive lamps, LED light sources are gradually gaining the attention of major automotive manufacturers due to their excellent performance and low cost. As LED light sources have developed, their associated light distribution structures have also evolved, from the reflector shell design in the early stages, through the reflector shell with lenses, to the design of lenses alone; the light distribution patterns of automotive lamps are also constantly expanding.

[0003] Nowadays, most automotive lamps use optical solutions based on pure reflection, reflection plus projection, or pure projection, with pure reflection and reflection plus projection being the most common, while pure projection is rarely used. Furthermore, most automotive lamp low-beam distribution modules employ a deflector plate to create a low-beam pattern. Due to the presence of this deflector plate, the overall dimensions of the modules are somewhat limited, making it difficult to further improve low-beam distribution modules to meet the diverse shape requirements of automotive lamps. OVERVIEW

[0004] In view of the problems mentioned above, the present invention aims to provide a low beam distribution structure for motor vehicles in order to overcome the shortcomings of existing low beam distribution structures using a deflector plate and to meet the requirement for the variety of shapes of motor vehicle lamps.

[0005] To achieve the above-described goal, the following technical solution is used in the present invention: Low beam distribution structure for motor vehicles to influence the light rays emitted by light sources so that they form a low beam pattern, comprising: a first inner lens, the first optical entrances, which correspond numerically to the light sources and which receive the light rays emitted by the light sources, and first optical exit ends for the exit of the light rays from the first inner lens, wherein at least two of the first optical entry ends are configured in two groups for collimated transmission or converged transmission of the received light rays, and the first optical exit ends are configured such that they form a light-dark boundary contour in the transmitted light rays; a second inner lens, which is arranged downstream of the first inner lens in the beam path to converge the transmitted light rays, and has second optical entry points for receiving the transmitted light rays and second optical exit points for the exit of the light rays from the second inner lens, an outer lens which is arranged downstream of the second inner lens in the beam path and has third optical entry points for receiving the transmitted light rays and third optical exit points for the exit of the light rays from the outer lens.

[0006] Furthermore, according to another embodiment, the outer lens comprises a main body that accommodates the first inner lens and the second inner lens, and an optical part provided on the main body, wherein the third optical entry ends and the third optical exit ends are arranged on opposite sides of the optical part.

[0007] Moreover, according to a further embodiment, the first optical entry end comprises a recess embedded in the first inner lens and a projection formed on the bottom of the recess and extending towards the opening of the recess; in the two groups of first optical entry ends for collimated transmission and converged transmission of the received light rays, the projections extend to different degrees, and the cross-sections of the first optical entry ends orthogonal to the transmission direction of the light rays are of different sizes.

[0008] The first optical exit ends are preferably also flat first light exit surfaces formed on the first inner lens.

[0009] Furthermore, the second optical entry points are preferably designed as flat second light entry surfaces on the second inner lens and arranged opposite the first light exit surfaces.

[0010] Furthermore, according to a preferred embodiment, the second optical exit ends have curved convex second light exit surfaces that correspond numerically to the first optical entry ends, and the second light exit surfaces are designed in a one-to-one correspondence with the first optical entry ends.

[0011] Furthermore, according to another embodiment, the third optical entrance ends comprise third light entrance surfaces configured for convergent transmission of the light rays, corresponding to the first optical entrance ends, and fourth light entrance surfaces configured for collimated transmission of the light rays, corresponding to the first optical entrance ends, and the third optical exit ends comprise curved convex third light exit surfaces formed on the outer lens; the fourth light entrance surfaces are adapted to the third light exit surfaces, and the third light entrance surfaces are curved surfaces projecting towards the side of the second inner lens.

[0012] If two first optical entry points are provided for collimated transmission of the light rays or two first optical entry points for converged transmission of the light rays, two third light entry surfaces are provided corresponding to the two first optical entry points for converged transmission of the light rays and are designed in one-to-one correspondence to the two first optical entry points for converged transmission of the light rays.

[0013] According to another embodiment, the first inner lens is designed with fastening pins, the second inner lens with through holes through which the fastening pins can protrude, and the outer lens with fastening holes for inserting the fastening pins in order to fasten the first inner lens and the second inner lens.

[0014] In addition, the outer lens can be designed with mounting holes next to the fastening holes for attaching the outer lens to an external element.

[0015] Compared with the prior art, the present invention has the following advantages: The low beam distribution structure for motor vehicles provided by the present invention forms a light / dark boundary contour by utilizing the optical exit ends of the lenses, in particular the optical surfaces of the lenses, thus eliminating the need for a deflecting plate, thereby avoiding the disadvantages of conventional low beam distribution structures that use a deflecting plate, enabling light distribution structures with different shapes and dimensions to be realized and fulfilling the requirement for the variety of shapes of motor vehicle lamps.

[0016] Furthermore, the arrangement of the first inner lens and the second inner lens on the outer lens improves the overall low-beam distribution structure for motor vehicles according to the present invention, and the structural design of the first optical inlet ends can capture the light rays emitted by the light sources to reduce light beam loss. The arrangement of the optical inlet and outlet ends of the outer lens results in a better low-beam pattern with a clearer light-dark boundary, and the mounting between the mounting posts and the mounting holes facilitates lens installation. List of characters

[0017] The accompanying figures, which are part of the present invention, serve to further illustrate the present invention. The illustrative embodiments of the present invention and their description serve to clarify the present invention, but do not constitute an impermissible limitation of the present invention. The figures show: Fig. Figure 1 is a schematic overall representation of the light distribution structure according to an embodiment of the present invention; Fig. Figure 2 is a schematic representation of the structure of the first inner lens according to an embodiment of the present invention; Fig. Figure 3 is a sectional view of the first optical entry end according to an embodiment of the present invention; Fig. Figure 4 is a schematic representation of the differences between the two groups of first optical entry points according to an embodiment of the present invention; Fig. Figure 5 is a rear view of the first inner lens according to the embodiment of the present invention; Fig. Figure 6 is a schematic representation of the radiation transmission through the first inner lens according to an embodiment of the present invention; Fig. Figure 7 is a schematic representation of the structure of the second inner lens according to an embodiment of the present invention; Fig. Figure 8 is a schematic representation of the radiation transmission through the second inner lens according to an embodiment of the present invention; Fig. Figure 9 is a schematic representation of the structure of the outer lens according to an embodiment of the present invention; Fig. 10 is a front view of the outer lens according to the embodiment of the present invention; Fig. 11 is a sectional view AA of the structure from Fig. 10; Fig. Figure 12 shows the path of the light rays at the first optical entry points to light convergence in the light distribution structure according to an embodiment of the present invention; Fig. Figure 13 shows the light patterns of the light distribution structure according to an embodiment of the present invention. Reference symbol list 1 - first inner lens, 2 - second inner lens, 3 - Outer lens; 101 - first optical entry end, 102 - first optical exit point, 103 - Outline, 104 - Fastening pin; 201 - second optical entry end, 202 - second optical exit end, 203 - Through hole, 204 - Through hole; 301 - Main body, 302 - optical part, 303 - Mounting hole, 304 - Mounting hole; 1010 - In-depth study, 1011 - lead, 1012 - first optical surface, 1013 - second optical surface, 1014 - third optical surface, 3021 - third optical entry end, 3022 - third optical exit end, 30211 - third light entry surface, 30212 - fourth light entry surface. DETAILED DESCRIPTION

[0018] It should be noted that the embodiments and features of the embodiments in the present invention can be freely combined, provided that they do not contradict each other.

[0019] The present invention is described in detail below in various embodiments with reference to the accompanying drawings.

[0020] One embodiment of the present invention relates to a low-beam light distribution structure for motor vehicles, which serves to shape the light rays emitted by light sources into a low-beam pattern. The light sources belonging to the light distribution structure in this embodiment are at least two successively arranged light sources; in particular, four light sources are provided in this embodiment, and the light sources are generally LED units. As in Fig. As shown in Figure 1, the low beam distribution structure for motor vehicles in this embodiment generally comprises a first inner lens. 1 , a second inner lens 2 and an external lens 3and forms an optical model of a pure projection lens by combining the two inner lenses and the outer lens.

[0021] Regarding the two inner lenses and the outer lens 3 In this embodiment, the first inner lens 1 , as in Fig. 2 shown, first optical entry points 101 , which correspond numerically to the light sources (not shown) in order to detect the light rays emitted by the light sources, and first optical exit points 102 for the exit of light rays from the first inner lens 1 Four initial optical entry points 101 are designed in two groups for collimated transmission and convergent transmission of the incoming light rays, with each group having two first optical entry points. 101 are located. Additionally, the first inner lens can 1in this embodiment due to the design of the first optical exit ends 102 in accordance with the training of two groups of first optical entry students 101 For collimated or converged transmission of light rays, a light / dark boundary contour also forms in the transmitted light rays.

[0022] As in Fig. As shown in section 3, the first optical entry end is included. 101 the first inner lens 1 in the present embodiment, in particular a recess 1010 , which are located in the terminal section of the first inner lens 1 is embedded, and has a lead 1011 , which is at the bottom of the depression 1010 is formed and points towards the opening of the depression 1010 is in front. The deepening 1010 and the lead 1011 can the in Fig. exhibit the three forms shown. Furthermore, a first optical surface is present. 1012on the outer wall of the projection 1011 designed to focus some light rays from the light sources into the first inner lens 1 to initiate a second optical surface 1013 is on the side wall of the recess 1010 designed to refract other light rays from the light sources, and a third optical surface 1014 is on the outer wall of the first inner lens 1 formed, which are connected to the second optical surface 1013 works together to reduce the impact of the second optical surface 1013 to completely reflect refracted light rays.

[0023] By the arrangement of the depression 1010 , the lead 1011 and of the three optical surfaces, the first optical entrance end can be 101 In this embodiment, the majority of the light rays emitted by the light sources are captured by the first optical surface. 1012bundle and capture, while the second optical surface 1013 can refract other light rays emitted by the light sources, and then the third optical surface 1014 can completely reflect the refracted light rays, so that the light rays emitted by the light sources can be used essentially completely, thereby achieving an improvement in the use of the light rays emitted by the light sources compared to the design of the optical entrance ends of existing lenses.

[0024] It should be noted that a desired light pattern can be achieved by matching the curvature between the three optical surfaces of the first optical entrance ends. 101This can be achieved. Of course, the specific curvature properties of the three optical surfaces mentioned above can be selected during the design process according to the actual requirements for the low beam and will not be described in further detail here.

[0025] Based on the above description of the first optical entry points 101 , as in Fig. As shown in 4, in this embodiment, the two groups of first optical entry points 101 For collimated transmission or converged transmission of the received light rays from the light source, the height of the projections 1012 a group of first optical entry points 101 different from that of the other group of first optical entry points 101 , and there is a height difference t between them; furthermore, the cross-sections of the two groups of first optical entrance ends are 101orthogonal to the beam transmission direction, the dimensions are of different sizes (i.e., the outer diameters are different), so that different optical functions (collimation or convergence of the light rays) are realized using the above-mentioned structural differences.

[0026] In this embodiment, the height difference t between the projections can be 1012 of the two groups of the first optical entry points 101 and the different outer diameters of the cross-sections of the two groups of the first optical entrance ends 101 should be chosen according to the actual requirements to minimize the effect of radiation transmission through the first inner lens. 1 to be implemented as described below.

[0027] According to this embodiment, the first optical output ends are 102 in particular flat first light-exit surfaces located at the first inner lens 1are trained. As in the Fig. 2, Fig. 5 and Fig. As shown in 12, the optical exit surfaces are located at the end of the first inner lens. 1 with the first optical exit ends 102 are formed, a recess is created below the first optical exit surfaces; in addition, as in the Fig. 6 and Fig. 12 shown, the focal point of the first optical entry points 101 in the convergence group (i.e., the first optical entry points) 101 (for the convergent transmission of light rays) entering light rays on the lower boundary (i.e. the contour line) 103 ) of the first optical surface. The contour line 103 is the boundary line between the first optical surface and the recess below the first optical surface, and the first inner lens 1 generated due to the formation of the contour line 103a preliminary light pattern with a light / dark boundary contour.

[0028] The shape of the contour line 103 determines the shape of the emerging light rays. In this embodiment, the contour line 103 especially the shape of broken lines. As in Fig. As shown in section 6, the two groups of the first optical entry points cause 101 A collimated (i.e., essentially parallel) and convergent transmission of the light rays occurs, and the plane first light-exiting surface does not change the transmission of parallel light rays but scatters angled light rays. Furthermore, the light rays in the convergence group are converged due to the fact that the contour line 103 is inverted relative to the light-dark boundary of the low beam pattern, onto the contour line 103The light rays are focused and then reversed on the first light-emitting surface after being focused, so that the corresponding light rays form a corresponding optical pattern.

[0029] In this embodiment, the second inner lens 2 downstream of the first inner lens 1 formed in the beam path to converge the transmitted light rays. As in Fig. As shown in section 7, the second inner lens has 2 second optical entry point 201 for the entry of the first inner lens 1 transmitted light rays and second optical exit ends 202 for the exit of light rays from the second inner lens 2 .

[0030] In particular, the second optical entry points 201 second light entry surfaces located on the second inner lens 2are formed, and each of the second light-entry surfaces has a planar structure opposite the first light-emission surface. The second optical output ends 202 They include curved, convex second light exit surfaces that complement the first optical entry end 101 numerically, they correspond, and the second light exit surfaces are in one-to-one correspondence to the first optical entry surfaces. 101 formed. The transmission of light rays through the second inner lens. 2 is in Fig. Figure 8 shows that the flat second light-entry surface does not change parallel light rays, but converges angled light rays, so that the light rays enter the second inner lens. 2 enter. After the light rays have converged through the second light exit surface, the light rays in the convergence group (i.e., the light rays that entered the first optical entrance) 101for the convergent transmission of the light rays) approximately parallel, while the light rays in the collimation group (i.e. the light rays that pass through the first optical entrance end) are approximately parallel. 101 (for the collimated transmission of the light rays) converge, so that the preliminary optical pattern formed by the first inner lens 1 was created, is further shaped.

[0031] In this embodiment, the outer lens 3 in the beam path downstream of the second inner lens 2 trained. As in Fig. As shown in 9, the outer lens 3 also third optical entry points 3021 for the entry of the second inner lens 2 emerging light rays and third optical exit ends 3022 for the exit of light rays from the outer lens 3 . In detail, the structure of the outer lens comprises 3in this embodiment a main body 301 to carry the first inner lens 1 and the second inner lens 2 and an optical part 302 , which is attached to the main body 301 is formed. The optical transfer function of the outer lens 3 is through the optical part 302 realized, and the aforementioned third optical entry points 3021 and third optical exit end 3022 are located on two opposite sides of the optical part 302 trained.

[0032] As in the Fig. 10 and Fig. As shown in 11, the third optical entry points comprise 3021 third light entry surfaces 30211 , corresponding to the first optical entry points 101 for the convergent transmission of the light rays (i.e., the two first optical entry points) 101in the convergence group), and fourth light entry surfaces 30212 , corresponding to the first two optical entry points 101 are designed for the collimated transmission of light rays. Furthermore, the third light entry surfaces are 30211 two the first optical entry points 101 Areas assigned to the convergence group that correspond one-to-one to the respective first optical entry points 101 are formed, while the third optical exit ends 3022 In this embodiment, the third light entry surfaces are curved and convex, located on the outer lens. 3 are trained.

[0033] In this embodiment, the fourth light entry surface 30212 specifically adapted to the third light emission surface, and the third light entry surface 30211 is a curved surface that faces the side of the second inner lens 2protrudes. With the above corresponding design, i.e., the curvature of the fourth light-entry surface. 30212 is equal to that of the third light-emitting surface, the section of the optical part 302 , the fourth light entry surface 30212 corresponds to a structure with a uniform wall thickness that has no optical effect on the light rays, while the convex third light entry surface 30211 the light rays can continue to converge, so that the light rays in the convergence group pass through the outer lens 3 They can be converged, thereby increasing the brightness at the light / dark boundary in the low beam pattern. The transmission of the light beam through the outer lens. 3 is in Fig. 11 shown.

[0034] In this embodiment, both inner lenses are attached to the outer lens. 3It is attached to improve the overall structure of the light distribution. Regarding the specific form of attachment, in a preferred embodiment the first inner lens 1 with fastening pins 104 formed, the second inner lens 2 is equipped with through holes 203 formed by which the fastening pins 104 can protrude through it, and the outer lens 3 It has mounting holes 303 formed, into which the fastening pins 104 can be inserted so that the fastening pins pass through the through holes. 203 protrude through and can be inserted into the mounting holes303, thereby mounting and securing the two inner lenses.

[0035] In addition to the mounting holes 303 In this embodiment, the following can be used to facilitate the uniform assembly of the light distribution structure in the outer lens: 3next to the mounting holes 303 Mounting holes 304 to be provided to accommodate the outer lens 3 to attach to an external element. Attachment is via the mounting holes. 304 This can be done using conventional state-of-the-art techniques. To further refine the light distribution structure and reduce the loss of light rays, the main body can be modified in this embodiment. 301 the outer lens 3 be trained with a receiving shaft, as in Fig. 9 shown; the optical part 302 forms the bottom of the recording shaft, and the end of the second inner lens 2 with the second optical output ends 202 can be partially trained in the intake shaft.

[0036] In the light distribution structure in this embodiment, the beam path of the light rays that enter the first optical entrance end is 101in the convergence group correspond to, in Fig. 12 is shown, and the overall light pattern of the light distribution structure is in Fig. 13 shown. The light pattern generally consists of a light pattern 1 and a light pattern 2 together, each of which is created by combining several light beams. The light pattern 1 The low beam pattern is formed at the light-dark boundary and is smaller than the high beam pattern. 2 , but has a higher brightness than the light pattern 2 , which can improve the lighting effect in front of the vehicle. The light pattern 2 forms the light pattern of the widened part to broaden the area of ​​the dipped beam pattern so that objects on both sides within a certain area in front of the motor vehicle can be illuminated.

[0037] Although the present invention is described above in some preferred embodiments, the present invention is not limited to these preferred embodiments. Any modification, equivalent replacement, or improvement made without deviation from the core and principle of the present invention shall be deemed to fall within the scope of protection of the present invention.

Claims

[1] Low beam distribution structure for motor vehicles, for configuring light beams emitted by light sources to form a low beam pattern, wherein the light sources are formed by at least two successively arranged light sources, and the low beam distribution structure for motor vehicles comprises: a first inner lens (1), the first optical entry ends (101) which correspond numerically to the light sources and receive the light rays emitted by the light sources, and first optical exit ends (102) for the exit of the light rays from the first inner lens (1), wherein at least two of the first optical entry ends (101) are configured in two groups for collimated transmission and converged transmission of the received light rays, respectively, and the first optical exit ends (102) are configured such that they form a light-dark boundary in the transmitted light rays; a second inner lens (2) which is arranged downstream of the first inner lens (1) in the beam path to converge the transmitted light rays, and which includes a second optical entry end (201) for receiving the transmitted light rays and a second optical exit end (202) for the exit of the light rays from the second inner lens (2), an outer lens (3) which is arranged downstream of the second inner lens (2) in the beam path and includes third optical entry ends (3021) for receiving the transmitted light rays and third optical exit ends (3022) for the exit of the light rays from the outer lens (3). [2] Low beam distribution structure for automobiles according to claim 1, wherein the outer lens (3) comprises a main body (301) accommodating the first inner lens (1) and the second inner lens (2), and an optical part (302) formed on the main body (301), wherein the third optical entry ends (3021) and the third optical exit ends (3022) are formed on opposite sides of the optical part (302). [3] Low beam distribution structure for motor vehicles according to claim 2, wherein the first optical entry end (101) comprises a recess (1010) embedded in the first inner lens (1) and a projection (1012) formed on the bottom of the recess (1010) and projecting towards the opening of the recess (1010); in the two groups of the first optical entry ends (101) for the collimated transmission and the converged transmission of the received light rays, the projections (1012) project to different degrees, and the cross-sections of the first optical entry ends (101) are of different sizes orthogonal to the transmission direction of the light rays. [4] Low beam distribution structure for motor vehicles according to claim 3, wherein the first optical exit ends (102) are planar first light exit surfaces formed on the first inner lens (1). [5] Low beam distribution structure for motor vehicles according to claim 4, wherein the second optical entry ends (201) are planar second light entry surfaces formed on the second inner lens (2) and opposite the first light exit surfaces. [6] Low beam distribution structure for motor vehicles according to claim 5, wherein the second optical exit ends (202) comprise curved convex second light exit surfaces which correspond numerically to the first optical entry ends (101), and the second light exit surfaces are formed in a one-to-one correspondence with the first optical entry ends (101). [7] Low beam distribution structure for motor vehicles according to claim 6, wherein the third optical entry ends (3021) comprise third light entry surfaces (30211) which are configured to converge the light rays in accordance with the first optical entry ends (101), and fourth light entry surfaces (30212) which are configured to collimate the light rays in accordance with the first optical entry ends (101), and the third optical exit ends (3022) comprise curved convex third light exit surfaces formed on the outer lens (3); the fourth light entry surfaces (30212) are adapted to the third light exit surfaces and the third light entry surfaces (30211) are curved surfaces projecting towards the side of the second inner lens (2). [8] Low beam distribution structure for motor vehicles according to claim 6, wherein two first optical entry ends (101) are provided for collimated transmission of the light rays or two first optical entry ends (101) for converged transmission of the light rays, two third light entry surfaces (30211) corresponding to the two first optical entry ends (101) for converged transmission of the light rays are provided and are designed in one-to-one correspondence to the two first optical entry ends (101) for converged transmission of the light rays. [9] Low beam distribution structure for motor vehicles according to any one of claims 2 to 8, wherein the first inner lens (1) is formed with fastening pins (104), the second inner lens (2) is formed with through holes (203) through which the fastening pins (104) can pass, and the outer lens (3) is formed with fastening holes (303) for inserting the fastening pins (104) to fasten the first inner lens (1) and the second inner lens (2). [10] Low beam distribution structure for motor vehicles according to claim 9, wherein the outer lens (3) is formed with mounting holes (304) next to the fastening holes (303) for fastening the outer lens (3) to an external element.