Patent ID: 12241606

Descriptions of reference numerals are as follows:1—primary optical element;101—light guiding portion;1011—side light guiding column;1012—middle light guiding column;1013—light-entering surface;102—fusion light-emitting portion;1021—light-emitting surface;1022—central cut-off line structure;1023-50L dark zone forming structure;1024—main light-emitting surface;1025—auxiliary light-emitting surface;1026—cut-off line outer side extending structure;103—primary optical element mounting portion;1031—plate insert hole;1032—clamp groove;1033—limiting block;1034—primary optical element upper and lower limiting surface;1035—primary optical element left and right limiting surface;1036—primary optical element forwards-moving limiting surface;2—primary optical element support;201—primary optical element main body containing cavity;2011—clamp block;2012—primary optical element backwards-moving limiting surface;202—supporting plate;2021—outer side extending cut-off line structure;2022—strengthening structure;203—regular-prismoid-shaped through hole;2031—light guiding column limiting hole;204—locating pin;205—circuit board abutting-joint surface;206—guide hole;207—sunlight focusing prevention plate;3—secondary optical element;4—secondary optical element support;401—primary optical assembly containing cavity;4011—containing cavity forwards-moving limiting surface;402—limiting cavity;4021—containing cavity upper and lower limiting surface;4022—containing cavity left and right limiting surface;403—stud;404—guide pin;5—circuit board;501—locating hole;6—heat sink;7—low-beam light source;8—screw;a-connecting position of central cut-off line structure and outer side extending cut-off line structure; b-bright and dark cut-off line; θ-included angle of gap between side light guiding column and middle light guiding column adjacent thereto.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The specific implementations of the present disclosure are described in detail below with reference to the accompanying drawings. It is to be understood that the specific implementations described here are merely for describing and explaining the present disclosure, and the protection scope of the present disclosure is not limited by the following specific implementations.

In the description of the present disclosure, it is to be noted that unless otherwise specified and limited clearly, terms of “connection” and “contact” are understood in a broad sense, for example, connection may be a fixed connection, or a detachable connection, or an integrated connection; and may be a direct connection, or an indirect connection through an intermediate medium, or may be communication of interiors of two elements or an interaction relationship of the two elements. Specific meanings of the above terms in the present disclosure may be understood by those ordinarily skilled in the art according to specific conditions.

It needs to be understood that position relations indicated by “upper”, “top”, “lower”, “bottom”, “front”, “rear”, “left”, “right” and the like are merely for conveniently describing the present disclosure and simplifying the description. Based on a primary optical element1, “front” refers to a direction where a light-emitting direction points, and “rear” refers to a direction opposite to “front”; “left” refers to a left side in the light-emitting direction, and “right” refers to a right side in the light-emitting direction, which are the same as a left-side direction and a right-side direction of normal driving of a vehicle; “upper” and “top” refers to an upper portion in the light-emitting direction, and “lower” and “bottom” refer to a lower portion in the light-emitting direction; and the terms are based on direction or position relations shown in the accompanying drawings, and are merely for conveniently describing the present disclosure and simplifying the description, but not for indicating or implying that an indicated device or element necessarily has a specific direction, and is necessarily constructed and operated in the specific direction, thereby being not understood as a limitation on the present disclosure. In the present disclosure, a fusion action of the fusion light-emitting portion102refers to mutually fusing light transmitted to the fusion light-emitting portion102and then transmitting the light to the light-emitting surface1021.

A first aspect of the present disclosure provides a primary optical element, referring toFIG.1toFIG.10, including a primary optical element main body. The primary optical element main body includes a light guiding portion101and a fusion light-emitting portion102which are provided from rear to front, a front end surface of the fusion light-emitting portion102is provided as a light-emitting surface1021, and the light guiding portion101includes a plurality of light guiding columns sequentially arranged in a left-right direction, a thickness of the fusion light-emitting portion102in an up-down direction is greater than a thickness of the light guiding portion101in the up-down direction, and the fusion light-emitting portion102is able to fuse light transmitted by the plurality of light guiding columns to the fusion light-emitting portion102, and then emit the light by means of the light-emitting surface1021.

In the present disclosure, the primary optical element1may be made of a transparent material such as silica gel, PC and PMMA, preferably, made of the silica gel, so the primary optical element1has effects of being resistant to high temperature and high in transmittance.

In the primary optical element1provided by the present disclosure, referring toFIG.9, a rear end surface of each light guiding column forms a light-entering surface1013, when applied to a vehicle lamp lighting device, a corresponding light source (namely, a low-beam light source7below) is provided at a rear end of each light-entering surface1013, and light emitted by each low-beam light source7enters the light guiding column through the corresponding light-entering surface1013, and is transmitted into the fusion light-emitting portion102through the light guiding column. As the thickness of the fusion light-emitting portion102is increased, not only can light transmitted by each light guiding column to the fusion light-emitting portion102be fused in the fusion light-emitting portion102so that light transmitted to the light-emitting surface1021is uniformly distributed, but also the light emitted from the light-emitting surface1021can be more diffused, so it is beneficial for light shape softening of a lower portion of an upper boundary of a low-beam light shape, and thus the primary optical element1is high in optical efficiency, and enables a formed low-beam light shape to have a good effect.

In a first preferable embodiment of the primary optical element1of the present disclosure, referring toFIG.1toFIG.7, the plurality of light guiding columns include two side light guiding columns1011and at least one middle light guiding column1012, the at least one middle light guiding column1012is sequentially arranged between the two side light guiding columns1011in the left-right direction, and an outer side surface of each of the side light guiding columns1011is provided in such way as extending forwards along a straight line and then bending towards an outer side along a curve from rear ends of the side light guiding columns1011to extend to a rear side of the fusion light-emitting portion102. The outer side surface of the side light guiding column1011specifically refer to side surfaces of the side light guiding column1011away from the middle light guiding column1012, for example, the outer side surface of the side light guiding column1011on a left side is a left side surface of this side light guiding column1011. The plurality of light guiding columns are sequentially arranged in the left-right direction, so that the primary optical element1can meet a structural design requirement for miniaturization and flattening of an appearance of a vehicle lamp, meanwhile, the outer side surface of the side light guiding column1011is provided in such way as extending forwards along the straight line and then bending towards the outer side along the curve from the rear ends to extend to the rear side of the fusion light-emitting portion102, so that outer side outlines of the side light guiding columns1011bend gradually towards two sides, and thus a lighting range of two sides of the low-beam light shape can be widened, and effects of the light shape are improved.

In some preferable embodiments of the middle light guiding column1012of the present disclosure, the middle light guiding column1012is provided in such way as making a distance between a left side surface and a right side surface increase gradually from rear to front, so that a light guiding column gap can be formed between the middle light guiding column1012and the light guiding column adjacent thereto, and meanwhile, light entering the light-entering surface1013of the middle light guiding column1012can be totally reflected therein and forwards transmitted as much as possible. At the moment, inner side surfaces of the side light guiding columns1011may also be provided as tilting from rear to front, so that wedge-shaped light guiding column gaps are formed between the adjacent middle light guiding columns1012and between the side light guiding column1011and the middle light guiding column1012adjacent to this side light guiding column1011, and thus a situation that the optical efficiency is reduced due to light escape among each light guiding columns is prevented.

In a preferable case, an included angle formed by the left side surface and the right side surface of the middle light guiding column1012is 2° to 4°, an included angle θ of a gap between the side light guiding column1011and the middle light guiding column1012adjacent to this side light guiding column1011, namely, an angle of the light guiding column gap between the side light guiding column1011and the middle light guiding column1012adjacent thereto, is 5° to 10°, so efficiency of total reflection, in the corresponding light guiding column, of light entering the side light guiding columns1011and the middle light guiding column1012is improved, and the optical efficiency of the light in the primary optical element1is further improved.

In a second preferable embodiment of the primary optical element1of the present disclosure, the light-emitting surface1021is provided as a forwards-convex curved surface, so that the emitted light is more condensed, and the optical efficiency of the primary optical element1is improved.

In a preferable case, referring toFIG.1,FIG.2,FIG.21andFIG.22, a cut-off line structure is formed at a bottom of the light-emitting surface1021. The cut-off line structure includes a central cut-off line structure1022and cut-off line outer side extending structures1026located on two sides of the central cut-off line structure1022, the cut-off line outer side extending structures1026are smoothly connected with the central cut-off line structure1022, so that a bright and dark cut-off line b can exist on a light shape formed by the light emitted from the light-emitting surface1021and then projected by a secondary optical element3(such as a lens) below, and a corresponding structural design may be made according to a requirement of the light shape. Specifically, when the cut-off line structure is formed at the bottom of the light-emitting surface1021, the central cut-off line structure1022is used for forming an upper boundary of a main low-beam light shape at a middle of the low-beam light shape, namely, a part of the middle of the bright and dark cut-off line b of the light shape, the corresponding formed upper boundary is a cut-off line shape with a height difference on two sides being connected through an oblique line.

Further preferably, a pit is formed in a bottom of a front end of the fusion light-emitting portion102and serves as a50L dark zone forming structure1023, light entering a50L dark zone is reduced, brightness of the50L dark zone is controlled, and thus the low-beam light shape meets a requirement of laws and regulations.

In the present disclosure, the light guiding portion101may be provided to connect with the fusion light-emitting portion102at a middle area in the up-down direction at a rear end of the fusion light-emitting portion102, or may also be provided in such way as making a bottom surface of the light guiding portion101flush with a bottom surface of the fusion light-emitting portion102, so that when the cut-off line structure is formed at the bottom of the light-emitting surface1021, a shape and a position of the bright and dark cut-off line b on the formed low-beam light shape are guaranteed.

When the cut-off line structure is formed at the bottom of the light-emitting surface1021, in order to improve a optical dispersion phenomenon at the bright and dark cut-off line b and improve visual feeling of a driver, in some preferable embodiments of the light-emitting surface1021in the present disclosure, referring toFIG.5, the light-emitting surface1021includes a main light-emitting surface1024and an auxiliary light-emitting surface1025located on a lower side of the main light-emitting surface1024, the auxiliary light-emitting surface1025is provided as gradually tilting towards lower and back from top to bottom, and the cut-off line structure is provided on the auxiliary light-emitting surface1025. At the moment, the auxiliary light-emitting surface1025can make the light passing through the cut-off line structure tilt towards upper and front to enter the secondary optical element3, and this part of light may be prevented from being emitted from a lower half portion of the secondary optical element3as much as possible, so that a color of the formed bright and dark cut-off line b is improved and the visual feeling of the driver is improved. In a preferable case, a transitional surface is provided between the main light-emitting surface1024and the auxiliary light-emitting surface1025, the transitional surface is preferably provided as an arc surface, so as to smoothly connect the main light-emitting surface1024and the auxiliary light-emitting surface1025.

As a relatively preferable specific implementation structure of the primary optical element1in the present disclosure, the primary optical element1includes the primary optical element main body, the primary optical element main body includes the light guiding portion101and the fusion light-emitting portion102provided from rear to front, the thickness of the fusion light-emitting portion102in the up-down direction is greater than the thickness of the light guiding portion101in the up-down direction, the front end surface of the fusion light-emitting portion102is provided as the light-emitting surface1021, the light guiding portion101includes three light guiding columns sequentially arranged in the left-right direction, the three light guiding columns are the two side light guiding columns1011and one middle light guiding column1012, rear end surfaces of the side light guiding columns1011and the middle light guiding column1012form the light-entering surfaces1013, the outer side surface of each of the side light guiding columns1011is provided in such way as extending forwards along the straight line and then bending towards the outer side along the curve from the rear ends of the side light guiding columns1011to extend to the rear side of the fusion light-emitting portion102, the distance between the left side surface and the right side surface of the middle light guiding column1012increases gradually from rear to front, the included angle of 2° to 4° is formed, the angle of the light guiding column gap between the side light guiding column1011and the middle light guiding column1012is 5° to 10°, the light-emitting surface1021is provided as the forwards-convex curved surface and includes the main light-emitting surface1024and the auxiliary light-emitting surface1025located on the lower side of the main light-emitting surface1024, the auxiliary light-emitting surface1025is provided as gradually tilting towards lower and back from top to bottom, the cut-off line structure is provided at the bottom of the auxiliary light-emitting surface1025and includes the central cut-off line structure1022and the cut-off line outer side extending structures1026located on the two sides of the central cut-off line structure1022, the cut-off line outer side extending structures1026are smoothly connected with the central cut-off line structure1022, and the50L dark zone forming structure1023is provided at the bottom of the front end of the fusion light-emitting portion102.

Light emitted by the low-beam light source7corresponding to the above primary optical element1enters the side light guiding columns1011and the middle light guiding column1012through the corresponding light-entering surface1013, and is transmitted into the fusion light-emitting portion102through the light guiding columns, the fusion light-emitting portion102causes the light transmitted by each light guiding column to the fusion light-emitting portion102to be fused in the fusion light-emitting portion102and then emitted from the light-emitting surface1021, meanwhile, under an action of the cut-off line structure, the light emitted from the light-emitting surface1021forms the bright and dark cut-off line, and the50L dark zone forming structure1023can effectively control the brightness of the50L dark zone, so that the formed low-beam light shape meets the requirement of laws and regulations.

When the primary optical element1of the present disclosure is mounted in a vehicle lamp lighting device, a conventional mounting mode may be adopted, the primary optical element is connected and fixed to other parts in the vehicle lamp lighting device, preferably, the primary optical element1is mounted on the primary optical element support2, and at the moment, the primary optical element1and the primary optical element support2form the primary optical assembly.

A second aspect of the present disclosure provides a primary optical element support2, used for mounting a primary optical element1. Referring toFIG.11toFIG.15, the primary optical element support2includes a primary optical element main body containing cavity201, the primary optical element support2is able to be connected with the primary optical element1in an inserted mode, and thus the primary optical element1or a primary optical element main body is mounted in the primary optical element main body containing cavity201to form the primary optical assembly. At the moment, the primary optical element1may be of various primary optical element structures, such as may be a condenser, and may also be an optical element structure with a light-entering portion, a transmission portion and a light-emitting portion. When the primary optical element1is of the above structures in the present disclosure, when the primary optical element and the primary optical element support2are mounted, the primary optical element main body is mounted in the primary optical element main body containing cavity201.

In a first preferable embodiment of the primary optical element support2in the present disclosure, a supporting plate202is provided in the primary optical element main body containing cavity201, so that in a state that the primary optical element main body is mounted in the primary optical element main body containing cavity201, a bottom of a fusion light-emitting portion102is supported on the supporting plate202. A structure of the primary optical assembly formed by inserted connection of the primary optical element1and the primary optical element support2is firmer, so that structural stability during mounting and use of the primary optical element1and formed light shape stability are improved, and thus a structure between parts of the vehicle lamp lighting device is more compact and position accuracy between the parts is higher.

In a preferable case, based on that the primary optical element1includes the primary optical element main body, and the primary optical element main body includes a light guiding portion101with a plurality of light guiding columns and the fusion light-emitting portion102from rear to front, referring toFIG.11toFIG.15, a plurality of regular-prismoid-shaped through holes203with section perimeters decreasing gradually from front to rear are formed in a rear end of the primary optical element main body containing cavity201, an opening of a rear end of each regular-prismoid-shaped through hole203is provided as a light guiding column limiting hole2031able to limit the light guiding column, and the light guiding columns can be inserted into the corresponding light guiding column limiting holes2031respectively. When the primary optical element support2and the primary optical element1are connected in an inserted mode, not only can front ends support the primary optical element1by the supporting plate202, but also the light guiding columns can be inserted into the light guiding column limiting holes2031from the corresponding regular-prismoid-shaped through holes203to be limited, position accuracy of rear ends of the light guiding column relative to a light source is guaranteed, mounting position accuracy and reliability of the primary optical element1can be further improved, the optical efficiency is improved, and a lighting effect of a vehicle lamp is improved. It may be understood that the primary optical element support2provided by the present disclosure can be not only applied to the primary optical element1in the present disclosure, but also applied to various other primary optical element structures each having the light guiding portion101and the fusion light-emitting portion102.

In the present disclosure, due to structural arrangement of the regular-prismoid-shaped through holes203, when the primary optical element main body is connected into the primary optical element main body containing cavity201in an inserted mode, the light guiding columns are conveniently inserted into the light guiding column limiting holes2031from the corresponding regular-prismoid-shaped through holes203to be limited. In a preferable case, the number of the regular-prismoid-shaped through holes203is greater than or equal to the number of the light guiding columns.

In a using process of the vehicle lamp, a secondary optical element3is usually provided, sunlight shines on the secondary optical element3and forms a high temperature by focusing in the vehicle lamp, most of parts in the vehicle lamp are made of a plastic material and may have a phenomenon of melting in the high temperature, consequently, the vehicle lamp may be damaged, and a certain potential safety hazard further exists. Therefore, a sunlight focusing prevention plate207may be provided in a region in the vehicle lamp where focusing easily occurs, so that heat conducted to the parts prone to being molten is reduced, a vehicle lamp damage hazard is reduced, and safety is improved. As a second preferable embodiment of the primary optical element support2in the present disclosure, the sunlight focusing prevention plate207is provided on the primary optical element support2, at the moment, the sunlight focusing prevention plate207is preferably made of a metal material, for example, made of an ADC material, which is light, economical and good in heat conduction property.

Further preferably, referring toFIG.12, a strengthening structure2022is provided at a bottom of the supporting plate202, so as to strengthen structural strength of the supporting plate202, and thus supporting stability for the fusion light-emitting portion102is improved.

As a relatively preferable specific implementation structure of the primary optical element support2in the present disclosure, the primary optical element support2is applied to the primary optical element1including the light guiding portion101and the fusion light-emitting portion102, the light guiding portion101has the plurality of light guiding columns, the primary optical element support2includes the primary optical element main body containing cavity201used for inserted connection of the primary optical element main body and the supporting plate202located in the primary optical element main body containing cavity201, the plurality of regular-prismoid-shaped through holes203with section perimeters decreasing gradually from front to rear are formed in the rear end of the primary optical element main body containing cavity201, the opening of the rear end of each regular-prismoid-shaped through hole203is provided as the light guiding column limiting hole2031able to limit the light guiding column, and the number of the regular-prismoid-shaped through holes203is greater than or equal to the number of the light guiding columns, the sunlight focusing prevention plate207is provided on the primary optical element support2, clamp blocks2011are provided on an outer side of the primary optical element main body containing cavity201, a primary optical element backwards-moving limiting surface2012is formed at a front end of the primary optical element main body containing cavity201, and the strengthening structure2022is provided at the bottom of the supporting plate202.

The corresponding primary optical element main body can be mounted in the primary optical element main body containing cavity201through the above primary optical element support2, so that the fusion light-emitting portion102at a front end of the primary optical element1is supported on the supporting plate202, the rear ends of the light guiding columns are inserted into the light guiding column limiting holes2031to be limited, thus mounting structural stability of the primary optical element1is good, position accuracy thereof is high, the optical efficiency is improved, and the lighting effect of the vehicle lamp is improved.

A third aspect of the present disclosure provides a primary optical assembly, including the primary optical element1described in any above technical solution and the primary optical element support2used for mounting the primary optical element1. When the primary optical element1is mounted by means of the primary optical element support2, the primary optical element support2may adopt a mounting support in the prior art, and in order to further improve structural stability during mounting and use of the primary optical element1and formed light shape stability, the primary optical element support2preferably adopts the primary optical element support2described in any above technical solution in the present disclosure.

In order to conveniently mount and connect the primary optical element1and the primary optical element support2, as a first preferable embodiment of the primary optical assembly in the present disclosure, referring toFIG.16toFIG.30, with reference toFIG.8toFIG.10, the primary optical element1further includes a primary optical element mounting portion103connected with the primary optical element main body, left and right side surfaces and a top surface of a fusion light-emitting portion102are connected with the primary optical element mounting portion103, a plate insert hole1031is formed between a bottom surface of the fusion light-emitting portion and the primary optical element mounting portion103, with reference toFIG.11toFIG.15, a supporting plate202is provided in a primary optical element main body containing cavity201, the supporting plate202is able to be connected into the plate insert hole1031in an inserted mode, and thus the fusion light-emitting portion102is supported on the supporting plate202. When the primary optical element main body is inserted into the primary optical element main body containing cavity201from a front side of the primary optical element support2, correspondingly, the supporting plate202is connected into the plate insert hole1031in an inserted mode, the fusion light-emitting portion102is supported on the supporting plate202, mounting and connection of the primary optical element1and the primary optical element support2is firmer, and thus optical stability of the primary optical element1is improved.

It may be understood that in the primary optical assembly of the present disclosure, the above mounting and connection mode of the primary optical element1and the primary optical element support2may be applied to the primary optical element1and/or the primary optical element support2of various structures, which is not limited to the structural form in the present disclosure. Specifically, the primary optical assembly may include the primary optical element1and the primary optical element support2used for mounting the primary optical element1, the primary optical element1includes the primary optical element main body and the primary optical element mounting portion103connected with the primary optical element main body, the primary optical element main body includes the light guiding portion101and the light-emitting portion provided from rear to front, a front end surface of the light-emitting portion is provided as a light-emitting surface1021, the left and right side surfaces and the top surface of the light-emitting portion are connected with the primary optical element mounting portion103, the plate insert hole1031is formed between the bottom surface of the light-emitting portion and the primary optical element mounting portion103, the primary optical element support2includes the primary optical element main body containing cavity201used for containing the primary optical element main body, the supporting plate202is provided in a primary optical element main body containing cavity201, so that the supporting plate202is able to be connected into the plate insert hole1031in an inserted mode in a state that the primary optical element main body is mounted in the primary optical element main body containing cavity201, and the light-emitting portion is supported on the supporting plate202. At the moment, connection of the primary optical element1and the primary optical element support2can achieve firm mounting and fixing of the both, and optical stability of the primary optical element1is improved. Thus, preferable structural forms of the following plate insert hole1031, the supporting plate202, the primary optical element main body containing cavity201and the primary optical element mounting portion103are also suitable for the primary optical assembly.

In the present disclosure, referring toFIG.17andFIG.18, a lower end of the plate insert hole1031is provided as a supporting plate contact surface which makes contact with a bottom surface of the supporting plate202, and a structure of the supporting plate contact surface is designed as being adapted to the bottom surface of the supporting plate202. For example, the supporting plate202is designed as a structure with a low middle and two high sides, correspondingly, the supporting plate contact surface is also designed as a structure with a low middle and two high sides, so that an inserted connection structure of the supporting plate202and the plate insert hole1031is more stable.

In a preferable case, clamp blocks2011are arranged on an outer side of the primary optical element main body containing cavity201, and clamp grooves1032matching the clamp blocks2011are formed in the primary optical element mounting portion103. Through matching of the clamp blocks2011and the clamp grooves1032, the primary optical element1is limited from moving forwards relative to the primary optical element support2, and is not prone to generating displacement relative to the primary optical element support2. Correspondingly, referring toFIG.26andFIG.27, a primary optical element backwards-moving limiting surface2012is formed at a front end of the primary optical element main body containing cavity201, and is in abutting joint with an inner end surface of the primary optical element mounting portion103, so as to limit the primary optical element1from moving backwards relative to the primary optical element support2. The clamp grooves1032may be specifically provided in such way as being distributed in each side wall of the primary optical element mounting portion103, the corresponding clamp blocks2011are provided on the outer side of the primary optical element main body containing cavity201, and thus structural stability after mounting of the primary optical element1and the primary optical element support2is improved.

Based on the second preferable embodiment of the above primary optical element1, referring toFIG.21andFIG.22, a central cut-off line structure1022and cut-off line outer side extending structures1026located on two sides of the central cut-off line structure1022are formed at a bottom of a light-emitting surface1021, as a second preferable embodiment of the primary optical assembly in the present disclosure, a front end surface of the supporting plate202is provided as an inwards-concave curved surface, outer side extending cut-off line structures2021are provided on two sides of a front end of a top surface of the supporting plate202respectively, and the outer side extending cut-off line structures2021are able to be connected with the central cut-off line structure1022so as to form a combined cut-off line structure, which replaces the cut-off line structure formed by the central cut-off line structure1022and the cut-off line outer side extending structures1026. As the light-emitting surface1021of the primary optical element1is the forwards-convex curved surface, generally, the two sides of the central cut-off line structure1022extend outwards to form the cut-off line outer side extending structures1026, and the central cut-off line structure1022and the cut-off line outer side extending structures1026match, so a bright and dark cut-off line b on a low-beam light shape is prone to having a phenomenon of warping and unevenness of two sides shown inFIG.19. Thus, an outer side of the central cut-off line structure1022needs to be provided as a curve inwards concave from front to rear, so that the two sides of the bright and dark cut-off line b can be even, by providing the outer side extending cut-off line structures2021in an inwards concave curve shape at a front end of the supporting plate202, used for supporting the fusion light-emitting portion102of the primary optical element1, on the primary optical element support2, that is, two ends of a top surface of a front end surface of the supporting plate202are used as the outer side extending cut-off line structures2021, which are connected with the central cut-off line structure1022to form the combined cut-off line structure, and thus the bright and dark cut-off line b with the two sides being even shown inFIG.20is formed.

In a preferable case, an aluminum-coated layer is provided in a region, between the cut-off line outer side extending structures1026and the outer side extending cut-off line structures2021, on the top surface of the supporting plate202, so that reflectivity of light entering the region can be improved, the light entering the region continues to be propagated forwards after being reflected, and the optical efficiency is improved.

As a relative preferable specific implementation structure of the primary optical assembly in the present disclosure, the primary optical element1and the primary optical element support2are included, the primary optical element1includes the primary optical element main body and the primary optical element mounting portion103connected with the primary optical element main body, the primary optical element main body includes the light guiding portion101and the fusion light-emitting portion102provided from rear to front, a thickness of the fusion light-emitting portion102in an up-down direction is greater than a thickness of the light guiding portion101in the up-down direction, the front end surface of the fusion light-emitting portion102is provided as the light-emitting surface1021, the light guiding portion101includes three light guiding columns sequentially arranged in a left-right direction, the three light guiding columns are two side light guiding columns1011and a middle light guiding column1012, rear end surfaces of the side light guiding columns1011and the middle light guiding column1012form light-entering surfaces1013, the outer side surface of each of the side light guiding columns1011is provided in such way as extending forwards along a straight line and then bending towards an outer side along a curve from rear ends of the side light guiding columns1011to extend to a rear side of the fusion light-emitting portion102, a distance between a left side surface and a right side surface of the middle light guiding column1012increases gradually from rear to front, an included angle of 2° to 4° is formed, an angle of a light guiding column gap between the side light guiding column1011and the middle light guiding column1012is 5° to 10°, the light-emitting surface1021is provided as the forwards-convex curved surface and includes the main light-emitting surface1024and the auxiliary light-emitting surface1025located on the lower side of the main light-emitting surface1024, the auxiliary light-emitting surface1025is provided as gradually tilting towards lower and back from top to bottom, the cut-off line structure is provided at a bottom of the auxiliary light-emitting surface1025and includes the central cut-off line structure1022and the cut-off line outer side extending structures1026located on the two sides of the central cut-off line structure1022, the cut-off line outer side extending structures1026are smoothly connected with the central cut-off line structure1022, a50L dark zone forming structure1023is provided at a bottom of a front end of the fusion light-emitting portion102, left and right side surfaces and a top surface of the fusion light-emitting portion102are connected with the primary optical element mounting portion103, the plate insert hole1031is formed between a bottom surface of the fusion light-emitting portion102and the primary optical element mounting portion103, the lower end of the plate insert hole1031is provided as the supporting plate contact surface matching a bottom surface of the supporting plate202, and the clamp grooves1032matching the clamp blocks2011are formed in the primary optical element mounting portion103.

The primary optical element support2includes the primary optical element main body containing cavity201used for inserted connection of the primary optical element main body and the supporting plate202located in the primary optical element main body containing cavity201, a plurality of regular-prismoid-shaped through holes203with section perimeters decreasing gradually from front to rear are formed in the rear end of the primary optical element main body containing cavity201, an opening of a rear end of each regular-prismoid-shaped through hole203is provided as a light guiding column limiting hole2031able to limit the light guiding column, and the number of the regular-prismoid-shaped through holes203is greater than or equal to the number of the light guiding columns, a sunlight focusing prevention plate207is provided on the primary optical element support2, the clamp blocks2011are provided on an outer side of the primary optical element main body containing cavity201, a primary optical element backwards-moving limiting surface2012is formed at a front end of the primary optical element main body containing cavity201, a strengthening structure2022is provided at a bottom of the supporting plate202, the front end surface of the supporting plate202is provided as the inwards-concave curved surface, the outer side extending cut-off line structures2021are provided on the two sides of the front end of the top surface of the supporting plate202respectively, and the aluminum-coated layer is provided in the region, between the cut-off line outer side extending structures1026and the outer side extending cut-off line structures2021, on the top surface of the supporting plate202.

A mounting process of the above primary optical assembly is: the primary optical element support2is connected with the primary optical element1in an inserted mode from a rear side of the primary optical element1, so that the primary optical element main body containing cavity201is connected into an inner cavity of the primary optical element mounting portion103in an inserted mode from the rear side of the primary optical element1, the primary optical element main body is mounted in the primary optical element main body containing cavity201, the supporting plate202is connected into the plate insert hole1031in an inserted mode, the bottom surface of the supporting plate202is attached to the supporting plate contact surface, the top surface of the supporting plate202is attached to a bottom surface of the fusion light-emitting portion102, so the outer side extending cut-off line structures2021and the central cut-off line structure1022have a connection position a of the central cut-off line structure and the outer side extending cut-off line structures so as to form the combined cut-off line structure, meanwhile, the clamp blocks2011are connected into the corresponding clamp grooves1032in a clamped mode, the primary optical element backwards-moving limiting surface2012is in abutting joint with the inner end surface of the primary optical element mounting portion103, and rear ends of the side light guiding columns1011and the middle light guiding column1012are inserted from front ends of the regular-prismoid-shaped through holes203respectively and limited onto the light guiding column limiting holes2031, so as to form the primary optical assembly.

Based on the above primary optical element1, the primary optical element support2and the primary optical assembly formed by the both, the primary optical element1may be mounted in a vehicle lamp lighting device in a form of the primary optical assembly. In a preferable case, according to a requirement for miniaturization and flattening of an appearance of a vehicle lamp and a demand of the market for a small vehicle lamp lighting device, a fourth aspect of the present disclosure provides an optical assembly, referring toFIG.31toFIG.41, a primary optical element1, a primary optical element support2, a secondary optical element3and a secondary optical element support4are mounted in an integrated mode, so a structure between parts of the vehicle lamp lighting device is more compact, and position accuracy between the parts is higher.

As a first preferable embodiment of the optical assembly in the present disclosure, referring toFIG.31toFIG.33, a primary optical assembly containing cavity401used for containing a primary optical assembly is formed in the secondary optical element support4, the secondary optical element3is mounted at a front end of the primary optical assembly containing cavity401, a locating limiting structure is provided on the primary optical element1and the primary optical assembly containing cavity401, so as to limit a degree of freedom of the primary optical assembly in a case that the primary optical assembly is provided in the primary optical assembly containing cavity401, thus connection structural stability and relative position accuracy between the primary optical assembly and the secondary optical element support are improved, then relative position accuracy between the primary optical element1and the secondary optical element3is improved, and the effect of the formed low-beam light shape is improved.

It may be understood that in the optical assembly of the present disclosure, the above mounting and connection mode of the primary optical assembly and the secondary optical element support4may be applied to the primary optical assembly and/or the secondary optical element support4of various structures, which is not limited to the structural form described in the present disclosure. The primary optical assembly is formed by inserted connection of the primary optical element support2and the primary optical element1. Specifically, the optical assembly may include the primary optical element1, the secondary optical element3, the primary optical element support2used for mounting the primary optical element1and the secondary optical element support4used for mounting the secondary optical element3, the primary optical element1includes the primary optical element main body, the primary optical element main body includes a light guiding portion101and a light-emitting portion provided from rear to front, and a front end surface of the light-emitting portion is provided as a light-emitting surface1021; the primary optical element support2includes a primary optical element main body containing cavity201, and the primary optical element support2is able to be connected with the primary optical element1in an inserted mode, so that the primary optical element main body is mounted in the primary optical element main body containing cavity201to form the primary optical assembly; and the primary optical assembly containing cavity401used for containing the primary optical assembly is provided on the secondary optical element support4, the secondary optical element3is mounted at a front end of the primary optical assembly containing cavity401, the locating limiting structure is provided on the primary optical element1and the primary optical assembly containing cavity401, so as to limit the degree of freedom of the primary optical assembly in a case that the primary optical assembly is provided in the primary optical assembly containing cavity401. At the moment, the locating limiting structure can improve the connection structural stability and the relative position accuracy between the primary optical assembly and the secondary optical element support4, thus the relative position accuracy between the primary optical element1and the secondary optical element3is improved, and the effect of the formed low-beam light shape is improved. Thus, a preferable structural form of the following locating limiting structure is also suitable for the optical assembly.

In the present disclosure, the locating limiting structure may be any structure of mutual matching for connection limiting provided on the primary optical element1and the primary optical assembly containing cavity401. In a preferable case, the locating limiting structure includes limiting cavities402located on the primary optical assembly containing cavity401and limiting blocks1033located on the primary optical element1, and the limiting cavities402match the limiting blocks1033. When the primary optical assembly is provided in the primary optical assembly containing cavity401, the limiting block1033is connected into the corresponding limiting cavity402in a clamped mode. A material of a primary optical element mounting portion103is usually silica gel, and the limiting block1033is preferably provided as being a square block shape with a certain thickness, so locating of the limiting block1033and the limiting cavity402is more accurate, and if the limiting block1033is thin, a phenomenon of deformation is prone to occurring, which is not good for its locating and mounting. A length, a width and a thickness of the limiting block1033are preferably set as being greater than or equal to 2 mm, for example, may be set as the length (in an up-down direction) being about 7.5 mm, the width (in a left-right direction) being about 5 mm, and the thickness (in a front-back direction) being about 4 mm.

Specifically, referring toFIG.8, the limiting blocks1033are located on a left side and a right side of the front end of the primary optical element1, so that a limiting effect on the primary optical assembly is more balanced, and limiting and mounting accuracy of the primary optical assembly and the secondary optical element support4is higher. When the primary optical element1includes the primary optical element mounting portion103, the limiting blocks1033are provided as being located on a left side and a right side of a front end of the primary optical element mounting portion103.

Based on the limiting blocks1033and the limiting cavity402, the locating limiting structure may also include the following structures: referring toFIG.8andFIG.33, upper and lower end surfaces of the limiting blocks1033form primary optical element upper and lower limiting surfaces1034, outer side surfaces of the limiting blocks1033form primary optical element left and right limiting surfaces1035, and containing cavity upper and lower limiting surfaces4021corresponding to the primary optical element upper and lower limiting surfaces1034and containing cavity left and right limiting surfaces4022corresponding to the primary optical element left and right limiting surfaces1035are provided on an inner wall of the limiting cavity402. The outer side surfaces of the limiting blocks1033specifically refer to a left side surface of the limiting block1033on a left side and a right side surface of the limiting block1033on a right side, when the primary optical assembly is mounted in the primary optical assembly containing cavity401, and while the limiting blocks1033are connected into the limiting cavities402in an inserted mode, the primary optical element upper and lower limiting surfaces1034are in abutting joint with the containing cavity upper and lower limiting surfaces4021, the primary optical element left and right limiting surfaces1035are in abutting joint with the containing cavity left and right limiting surfaces4022, and thus the degree of freedom of the primary optical assembly in the up-down direction and the left-right direction is limited.

Further specifically, the locating limiting structure may also include the following structures: referring toFIG.8andFIG.32, primary optical element forwards-moving limiting surfaces1036located on upper sides and/or lower sides of the limiting blocks1033are provided on the front end of the primary optical element1, containing cavity forwards-moving limiting surfaces4011matching the primary optical element forwards-moving limiting surfaces1036are provided at a rear end of the primary optical assembly containing cavity401, so that when the primary optical assembly is mounted in the primary optical assembly containing cavity401, the primary optical element forwards-moving limiting surfaces1036are in abutting joint with the containing cavity forwards-moving limiting surfaces4011, and thus the degree of freedom of forwards moving of the primary optical assembly is limited.

As a second preferable embodiment of the optical assembly in the present disclosure, referring toFIG.34toFIG.37, guide pins404are provided at a rear end of the secondary optical element support4, guide holes206matching the guide pins404are formed in the primary optical element support2, and thus rapid guiding and pre-locating are performed when the primary optical assembly and the secondary optical element support4are mounted. In a preferable case, the guide holes206and the guide pins404are not attached after being mounted and have a certain gap, so that the guide holes206and the guide pins404match to play a role only in guiding and pre-locating instead of accurate locating.

As a relatively preferable specific implementation structure of the optical assembly in the present disclosure, the optical assembly includes the primary optical element1, the primary optical element support2used for mounting the primary optical element1, the secondary optical element3and the secondary optical element support4used for mounting the secondary optical element3.

The primary optical element1includes a primary optical element main body and a primary optical element mounting portion103connected with the primary optical element main body, the primary optical element main body includes the light guiding portion101and the fusion light-emitting portion102provided from rear to front, a thickness of the fusion light-emitting portion102in an up-down direction is greater than a thickness of the light guiding portion in the up-down direction, a front end surface of the fusion light-emitting portion102is provided as a light-emitting surface1021, the light guiding portion101includes three light guiding columns sequentially arranged in a left-right direction, the three light guiding columns are two side light guiding columns1011and a middle light guiding column1012, rear end surfaces of the side light guiding columns1011and the middle light guiding column1012form light-entering surfaces1013, the outer side surface of each of the side light guiding columns1011is provided in such way as extending forwards along a straight line and then bending towards an outer side along a curve from rear ends of the side light guiding columns1011to extend to a rear side of the fusion light-emitting portion102, a distance between a left side surface and a right side surface of the middle light guiding column1012increases gradually from rear to front, an included angle of 2° to 4° is formed, an angle of a light guiding column gap between the side light guiding column1011and the middle light guiding column1012is 5° to 10°, the light-emitting surface1021is provided as a forwards-convex curved surface and includes a main light-emitting surface1024and an auxiliary light-emitting surface1025located on a lower side of the main light-emitting surface1024, the auxiliary light-emitting surface1025is provided as gradually tilting towards lower and back from top to bottom, a cut-off line structure is provided at a bottom of the auxiliary light-emitting surface1025and includes a central cut-off line structure1022and cut-off line outer side extending structures1026located on two sides of the central cut-off line structure1022, the cut-off line outer side extending structures1026are smoothly connected with the central cut-off line structure1022, a50L dark zone forming structure1023is provided at a bottom of a front end of the fusion light-emitting portion102, left and right side surfaces and a top surface of the fusion light-emitting portion102are connected with the primary optical element mounting portion103, a plate insert hole1031is formed between a bottom surface of the fusion light-emitting portion102and the primary optical element mounting portion103, a lower end of the plate insert hole1031is provided as a supporting plate contact surface matching a bottom surface structure of a supporting plate202, clamp grooves1032matching clamp blocks2011are formed in the primary optical element mounting portion103, the limiting blocks1033are provided on a left side and a right side of the front end of the primary optical element mounting portion103, the upper and lower end surfaces of the limiting blocks1033form the primary optical element upper and lower limiting surfaces1034, the outer side surfaces of the limiting blocks1033form the primary optical element left and right limiting surfaces1035, and the primary optical element forwards-moving limiting surfaces1036are provided on the upper sides and the lower sides of the limiting blocks1033respectively.

The primary optical element support2includes the primary optical element main body containing cavity201used for inserted connection of the primary optical element main body and the supporting plate202located in the primary optical element main body containing cavity201, a plurality of regular-prismoid-shaped through holes203with section perimeters decreasing gradually from front to rear are formed in the rear end of the primary optical element main body containing cavity201, an opening of a rear end of each regular-prismoid-shaped through hole203is provided as a light guiding column limiting hole2031able to limit the light guiding column, and the number of the regular-prismoid-shaped through holes203is greater than or equal to the number of the light guiding columns, a sunlight focusing prevention plate207is provided on the primary optical element support2, the clamp blocks2011are provided on an outer side of the primary optical element main body containing cavity201, a primary optical element backwards-moving limiting surface2012is formed at a front end of the primary optical element main body containing cavity201, a strengthening structure2022is provided at a bottom of the supporting plate202, a front end surface of the supporting plate202is provided as the inwards-concave curved surface, outer side extending cut-off line structures2021are provided on two sides of a front end of a top surface of the supporting plate202respectively, an aluminum-coated layer is provided in the region, between the cut-off line outer side extending structures1026and the outer side extending cut-off line structures2021, on the top surface of the supporting plate202, and the guide holes206are formed in a left side and a right side of the primary optical element support2respectively.

The primary optical assembly containing cavity401used for containing the primary optical assembly is formed in the secondary optical element support4, the secondary optical element3is mounted at the front end of the primary optical assembly containing cavity401, the limiting cavities402are formed in the rear end of the primary optical assembly containing cavity401, the containing cavity upper and lower limiting surfaces4021corresponding to the primary optical element upper and lower limiting surfaces1034and the containing cavity left and right limiting surfaces4022corresponding to the primary optical element left and right limiting surfaces1035are provided on the inner walls of the limiting cavities402, the containing cavity forwards-moving limiting surfaces4011matching the primary optical element forwards-moving limiting surfaces1036are provided on the rear end surface of the primary optical assembly containing cavity401, and the guide pins404matching the guide holes206are provided at the rear end of the secondary optical element support4.

A mounting process of the above provided optical assembly is:first step, the primary optical element support2is connected with the primary optical element1in an inserted mode from a rear side of the primary optical element1, so that the primary optical element main body containing cavity201is connected into an inner cavity of the primary optical element mounting portion103in an inserted mode from the rear side of the primary optical element1, the primary optical element main body is mounted in the primary optical element main body containing cavity201, the supporting plate202is connected into the plate insert hole1031in an inserted mode, the bottom surface of the supporting plate202is attached to the supporting plate contact surface, the top surface of the supporting plate202is attached to a bottom surface of the fusion light-emitting portion102, so the outer side extending cut-off line structures2021and the central cut-off line structure1022have a connection position a of the central cut-off line structure and the outer side extending cut-off line structures, so as to form the combined cut-off line structure, meanwhile, the clamp blocks2011are connected into the corresponding clamp grooves1032in a clamped mode, the primary optical element backwards-moving limiting surface2012is in abutting joint with an inner end surface of the primary optical element mounting portion103, and rear ends of the side light guiding columns1011and the middle light guiding column1012are inserted from front ends of the corresponding regular-prismoid-shaped through holes203respectively and limited onto the light guiding column limiting holes2031, so as to form the primary optical assembly.

Second step, the primary optical assembly is connected into the primary optical assembly containing cavity401in an inserted mode from the rear end of the secondary optical element support4, so the limiting blocks1033are connected into the corresponding limiting cavities402in an inserted mode, the primary optical element upper and lower limiting surfaces1034are attached to the corresponding containing cavity upper and lower limiting surfaces4021, the primary optical element left and right limiting surfaces1035are attached to the corresponding containing cavity left and right limiting surfaces4022, the primary optical element forwards-moving limiting surfaces1036are attached to the corresponding containing cavity forwards-moving limiting surfaces4011, meanwhile, the guide pins404are inserted into the corresponding guide holes206, and then the secondary optical element3is mounted at the front end of the primary optical assembly containing cavity401, so as to form the optical assembly.

A fifth aspect of the present disclosure provides a vehicle lamp lighting device, including low-beam light sources7and the optical assembly described in any above technical solution. The low-beam light sources7, the primary optical element1and the secondary optical element3are sequentially arranged from rear to front. Generally, the low-beam light sources7and the light guiding columns are in one-to-one correspondence.

As a first preferable embodiment of the vehicle lamp lighting device in the present disclosure, referring toFIG.42toFIG.50, the vehicle lamp lighting device further includes a circuit board5, the low-beam light sources7are provided on the circuit board5, locating pins204and a circuit board abutting-joint surface205able to make contact with the circuit board5are provided on a rear end of the primary optical element support2, and locating holes501matching the locating pins204are formed in the circuit board5. At least one circuit board abutting-joint surface205is provided, preferably, the circuit board abutting-joint surfaces are provided at four corners of the rear end of a primary optical element support2respectively, namely, a total of four circuit board abutting-joint surfaces205are provided, so that when the optical assembly is connected with the circuit board5, the circuit board5abuts against the circuit board abutting-joint surfaces205of the primary optical element support2in balance, a degree of freedom of backwards moving of the primary optical assembly is limited, meanwhile, the locating pins204are inserted into the locating holes501for rapidly locating the circuit board5, and meanwhile position accuracy between the low-beam light sources7and a light-entering surface1013of the primary optical element1is further guaranteed.

As a second preferable embodiment of the vehicle lamp lighting device in the present disclosure, referring toFIG.42toFIG.47, the vehicle lamp lighting device further includes a heat sink6, the heat sink6is provided on a rear side of the circuit board5, studs403are provided at a rear end of the secondary optical element support4, screw holes matching the studs403are formed in the heat sink6, screws8penetrate through the screw holes in the heat sink6to be in threaded connection with the studs403, that is, the heat sink6is tightened onto the secondary optical element support4through the screws8, so as to fixedly press the circuit board5. In a preferable case, the studs403are provided at diagonal corners of the rear end of the secondary optical element support4, so that a connection structure of all parts in the vehicle lamp lighting device is firmer.

Structures and mounting processes of the various parts such as the primary optical element1, the primary optical element support2, the secondary optical element3and the secondary optical element support4of the present disclosure are introduced below through a relatively preferable specific implementation structure of the vehicle lamp lighting device. The vehicle lamp lighting device includes the primary optical element1, the primary optical element support2used for mounting the primary optical element1, the secondary optical element3and the secondary optical element support4used for mounting the secondary optical element3, and the circuit board5and the heat sink6are sequentially provided on a rear side of the primary optical element1, and the low-beam light sources7are mounted on the circuit board5.

The primary optical element1includes a primary optical element main body and a primary optical element mounting portion103connected with the primary optical element main body, the primary optical element main body includes a light guiding portion101and a fusion light-emitting portion102provided from rear to front, a thickness of the fusion light-emitting portion102in an up-down direction is greater than a thickness of the light guiding portion101in the up-down direction, a front end surface of the fusion light-emitting portion102is provided as a light-emitting surface1021, the light guiding portion101includes three light guiding columns sequentially arranged in a left-right direction, the three light guiding columns are two side light guiding columns1011and a middle light guiding column1012, rear end surfaces of the side light guiding columns1011and the middle light guiding column1012form light-entering surfaces1013, the outer side surface of each of the side light guiding columns1011is provided in such way as extending forwards along a straight line and then bending towards an outer side along a curve from rear ends of the side light guiding columns1011to extend to a rear side of the fusion light-emitting portion102, a distance between a left side surface and a right side surface of the middle light guiding column1012increases gradually from rear to front, an included angle of 2° to 4° is formed, an angle of a light guiding column gap between the side light guiding column1011and the middle light guiding column1012is 5° to 10°, the light-emitting surface1021is provided as a forwards-convex curved surface and includes a main light-emitting surface1024and an auxiliary light-emitting surface1025located on a lower side of the main light-emitting surface1024, the auxiliary light-emitting surface1025is provided as gradually tilting towards lower and back from top to bottom, a cut-off line structure is provided at a bottom of the auxiliary light-emitting surface1025and includes a central cut-off line structure1022and cut-off line outer side extending structures1026located on two sides of the central cut-off line structure1022, the cut-off line outer side extending structures1026are smoothly connected with the central cut-off line structure1022, a50L dark zone forming structure1023is provided at a bottom of a front end of the fusion light-emitting portion102, left and right side surfaces and a top surface of the fusion light-emitting portion102are connected with the primary optical element mounting portion103, a plate insert hole1031is formed between a bottom surface of the fusion light-emitting portion102and the primary optical element mounting portion103, a lower end of the plate insert hole1031is provided as a supporting plate contact surface matching a bottom surface structure of a supporting plate202, clamp grooves1032matching clamp blocks2011are formed in the primary optical element mounting portion103, the limiting blocks1033are provided on a left side and a right side of a front end of the primary optical element mounting portion103, upper and lower end surfaces of the limiting blocks1033form primary optical element upper and lower limiting surfaces1034, outer side surfaces of the limiting blocks1033form primary optical element left and right limiting surfaces1035, and primary optical element forwards-moving limiting surfaces1036are provided on upper sides and lower sides of the limiting blocks1033respectively.

The primary optical element support2includes a primary optical element main body containing cavity201used for inserted connection of the primary optical element main body and the supporting plate202located in the primary optical element main body containing cavity201, a plurality of regular-prismoid-shaped through holes203with section perimeters decreasing gradually from front to rear are formed in a rear end of the primary optical element main body containing cavity201, an opening of a rear end of each regular-prismoid-shaped through hole203is provided as a light guiding column limiting hole2031able to limit the light guiding column, and the number of the regular-prismoid-shaped through holes203is greater than or equal to the number of the light guiding columns, a sunlight focusing prevention plate207is provided on the primary optical element support2, clamp blocks2011are provided on an outer side of the primary optical element main body containing cavity201, a primary optical element backwards-moving limiting surface2012is formed at a front end of the primary optical element main body containing cavity201, a strengthening structure2022is provided at a bottom of the supporting plate202, a front end surface of the supporting plate202is provided as an inwards-concave curved surface, outer side extending cut-off line structures2021are provided on two sides of a front end of a top surface of the supporting plate202respectively, the aluminum-coated layer is provided in a region, between the cut-off line outer side extending structures1026and the outer side extending cut-off line structures2021, on the top surface of the supporting plate202, guide holes206are formed in a left side and a right side of the primary optical element support2respectively, locating pins204are provided at a rear end of the primary optical element support2, and the circuit board abutting-joint surfaces205are located at the four corners of the rear end of the primary optical element support2.

A primary optical assembly containing cavity401used for containing a primary optical assembly is formed in the secondary optical element support4, the secondary optical element3is mounted at a front end of the primary optical assembly containing cavity401, limiting cavities402are formed in a rear end of the primary optical assembly containing cavity401, containing cavity upper and lower limiting surfaces4021corresponding to the primary optical element upper and lower limiting surfaces1034and containing cavity left and right limiting surfaces4022corresponding to the primary optical element left and right limiting surfaces1035are provided on inner walls of the limiting cavities402, containing cavity forwards-moving limiting surfaces4011matching the primary optical element forwards-moving limiting surfaces1036are provided on a rear end surface of the primary optical assembly containing cavity401, and the studs403at the diagonal corners and guide pins404matching guide holes206are provided at the rear end of the secondary optical element support4.

The locating holes501matching the locating pins204are formed in the circuit board5.

The screw holes matching the studs403are formed in the heat sink6.

A mounting process of a specific implementation of the above provided vehicle lamp lighting device is:first step, the primary optical element support2is connected with the primary optical element1in an inserted mode from a rear side of the primary optical element1, so that the primary optical element main body containing cavity201is connected into an inner cavity of the primary optical element mounting portion103in an inserted mode from the rear side of the primary optical element1, the primary optical element main body is mounted in the primary optical element main body containing cavity201, the supporting plate202is connected into the plate insert hole1031in an inserted mode, the bottom surface of the supporting plate202is attached to the supporting plate contact surface, the top surface of the supporting plate202is attached to a bottom surface of the fusion light-emitting portion102, so the outer side extending cut-off line structures2021and the central cut-off line structure1022have a connection position a of the central cut-off line structure and the outer side extending cut-off line structures, so as to form the combined cut-off line structure, meanwhile, the clamp blocks2011are connected into the corresponding clamp grooves1032in a clamped mode, the primary optical element backwards-moving limiting surface2012is in abutting joint with an inner end surface of the primary optical element mounting portion103, and rear ends of the side light guiding columns1011and the middle light guiding column1012are inserted from front ends of the corresponding regular-prismoid-shaped through holes203respectively and limited onto the light guiding column limiting holes2031, so as to form the primary optical assembly.

Second step, the primary optical assembly is connected into the primary optical assembly containing cavity401in an inserted mode from the rear end of the secondary optical element support4, so the limiting blocks1033are connected into the corresponding limiting cavities402in an inserted mode, the primary optical element upper and lower limiting surfaces1034are attached to the corresponding containing cavity upper and lower limiting surfaces4021, the primary optical element left and right limiting surfaces1035are attached to the corresponding containing cavity left and right limiting surfaces4022, the primary optical element forwards-moving limiting surfaces1036are attached to the corresponding containing cavity forwards-moving limiting surfaces4011, meanwhile, the guide pins404are inserted into the corresponding guide holes206, and then the secondary optical element3is mounted at the front end of the primary optical assembly containing cavity401, so as to form the optical assembly.

Third step, the low-beam light sources7are mounted on the circuit board5, the circuit board5is connected with a rear end of the optical assembly, that is, the locating pins204are connected into the corresponding locating holes501in an inserted mode, so that the circuit board5is attached to and in abutting joint with the circuit board abutting-joint surface205, then the screws8penetrate through the screw holes in the heat sink6and are inserted into the studs403to be tightened, the heat sink6and the secondary optical element support4are fixed, and the circuit board5is tightened, so mounting of the vehicle lamp lighting device is completed.

The above vehicle lamp lighting device can be designed as a largest size of a length, a width and a height of the vehicle lamp lighting device being smaller than or equal to 130 mm, preferably, being smaller than or equal to 100 mm, further, a smaller size of a length and a width of a light-emitting surface of the secondary optical element3or an optical element in another light-emitting form may be designed as being smaller than or equal to 20 mm, preferably, being smaller than or equal to 10 mm.

The primary optical element1, the primary optical element support2, the primary optical assembly, the optical assembly and the vehicle lamp lighting device provided by any above technical solution in the present disclosure can not only be applied to a small vehicle lamp lighting device, but also be applied to a larger-size vehicle lamp lighting device.

A sixth aspect of the present disclosure provides a vehicle, including the vehicle lamp lighting device described in any above technical solution. Thus, all beneficial effects brought by the technical solutions of the embodiments of the above primary optical element, the primary optical assembly, the optical assembly and the vehicle lamp lighting device are at least achieved.

It may be seen from the above description that through the above technical solutions, the light guiding portion101of the primary optical element1provided by the present disclosure is provided as the plurality of light guiding columns arranged sequentially in the left-right direction, and the thickness of the fusion light-emitting portion102in the up-down direction is greater than the thickness of the light guiding portion101in the up-down direction; as the thickness of the fusion light-emitting portion102is increased, not only can light transmitted by each light guiding column to the fusion light-emitting portion102be fused in the fusion light-emitting portion102so that light transmitted to the light-emitting surface1021is uniformly distributed, but also the light emitted from the light-emitting surface1021can be more diffused, so it is beneficial for light shape softening of the lower portion of the upper boundary of the low-beam light shape, and thus the primary optical element1is high in optical efficiency, and enables the formed low-beam light shape to have a good effect.

In preferable implementations of the present disclosure, the outer side surface of each of the side light guiding columns1011is provided in such way as extending forwards along the straight line and then bending towards the outer side along the curve from the rear ends to extend to the rear side of the fusion light-emitting portion102, and outer side outlines of the side light guiding columns1011gradually bend towards two sides, so that the lighting range of the two sides of the low-beam light shape can be widened; the primary optical element1and the primary optical element support2are connected in an inserted mode to form the primary optical assembly, so that the structural stability during mounting and use of the primary optical element1and the formed light shape stability can be improved, and the structure between the parts in the vehicle lamp lighting device is more compact and the position accuracy between the parts is higher; the locating limiting structure is provided on the primary optical element1and the primary optical assembly containing cavity401, connection structural stability and relative position accuracy between the primary optical assembly and the secondary optical element support4can be improved, thus relative position accuracy between the primary optical element1and the secondary optical element3is improved, and the effect of the formed low-beam light shape is improved.

The preferable implementations of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to this. Within the technical concept of the present disclosure, various simple variations may be made to the technical solutions of the present disclosure, which include combining various specific technical features in any appropriate mode, and in order to avoid unnecessary repetition, the present disclosure does not make extra description for various possible combination modes. However, these simple variations and combinations are also regarded as contents disclosed by the present disclosure and fall within the protection scope of the present disclosure.