Lens, low beam module and vehicle lamp

Abstract

The invention relates to a car lamp, and provides a lens, a low beam module and a car lamp, the low beam module comprises a light source (1), a primary optical element (2) and the lens (3), the lens (3) comprises a lens incident surface (301) and a lens emergent surface (302), and light emitted by the light source (1) is suitable for being converged by the primary optical element (2) and then emitted to the lens incident surface (301). The light is emitted through the lens light-emitting surface (302) to form a low-beam light type; wherein the upper side wall of the lens (3) is provided with a region III light-emitting surface (303), and the region III light-emitting surface (303) is configured in a way that at least part of light which is received by the lens light-incident surface (301) and is transmitted forwards and upwards is projected by the region III light-emitting surface (303) to form a low beam region III light type. According to the automobile lamp, the appearance of the automobile lamp is attractive, meanwhile, the automobile lamp module can be more compact, and the product cost is effectively controlled.

Description

Technical Field

[0001] The invention relates to a vehicle lamp, and in particular to a lens, a low beam module and a vehicle lamp. Background Art

[0002] In the device that realizes the lighting function of the headlight, a headlight lighting module is usually provided to realize various light patterns and obtain better lighting effects. The low beam of the headlight is for close-range lighting. According to the standards related to headlights (taking the Chinese standard GB25991 as an example), the low beam pattern has an important component called "Zone III", which is located above the cutoff line and mainly illuminates objects above the road surface such as signboards, so that the driver can obtain information such as signboards.

[0003] In the existing low beam lighting module, there are mainly two structures for forming zone III in the optical design of zone III: one is to set a row or several raised or recessed micro-pattern structures on the light incident surface or the light exit surface of the lens. However, as customers have higher requirements for the appearance of parts, this kind of optical structure feature with obvious appearance will make the appearance of the lens not beautiful enough, and thus cannot meet customers' expectations for the appearance effect of the lens; the other is to set an additional reflective component on the low beam light path, which enters the optical element and lens through reflection to form zone III. However, this will increase the number of components of the entire module and make it complicated, and the space occupied inside the headlight module will increase, making the headlight module not compact enough and also increasing the product cost. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a lens, a low beam module and a headlight, which can make the headlight appearance beautiful and at the same time make the headlight module more compact, thereby effectively controlling product costs.

[0005] In order to solve the above technical problems, the first aspect of the present application provides a low beam module, including a light source, a primary optical element and a lens, wherein the lens includes a lens light incident surface and a lens light exit surface, and the light emitted by the light source is suitable for being converged by the primary optical element and emitted to the lens light incident surface, and then emitted from the lens light exit surface to form a low beam light pattern; Among them, the upper side wall of the lens is provided with a zone III light emitting surface, and the zone III light emitting surface is not located on the lens light incident surface or the lens light exit surface, and the zone III light exit surface is configured so that at least part of the light received by the lens light incident surface and transmitted forward and upward is projected through the zone III light exit surface to form a low beam zone III light pattern.

[0006] In some specific embodiments, a zone III protrusion structure is formed on the upper side wall of the lens, and a front end surface of the zone III protrusion structure is the zone III light emitting surface.

[0007] In some specific embodiments, the protruding structure of zone III extends in a lateral direction, and two lateral ends of the protruding structure of zone III are respectively connected to the edges of the upper side wall of the lens located on both lateral sides.

[0008] In some specific embodiments, the primary optical element is a reflector, and a zone III reflective surface is arranged on the main reflective surface of the reflector. The zone III reflective surface is configured so that part of the light emitted by the light source is suitable for being reflected by the zone III reflective surface and then transmitted forward and upward, and is projected toward the zone III light emitting surface through the lens light incident surface.

[0009] In some specific embodiments, the upper side wall of the raised structure in zone III is a first reflective surface or a first light absorbing surface, and the first reflective surface is configured so that the light received by the light incident surface of the lens and directed toward the first reflective surface is reflected forward toward the light emitting surface of zone III through the first reflective surface, and is projected forward toward the low beam light type area through the light emitting surface of zone III.

[0010] In some specific embodiments, a low beam auxiliary light emitting surface is provided on at least one of the two lateral side walls and the lower side wall of the lens, and the low beam auxiliary light emitting surface is configured so that at least part of the light received by the lens light incident surface and transmitted forwardly toward the low beam auxiliary light emitting surface relative to the orientation of the lens (3) body is projected through the low beam auxiliary light emitting surface toward the edge area of ​​the low beam light pattern.

[0011] In some specific embodiments, a low beam auxiliary protrusion structure is formed on at least one of the two lateral side walls and the lower side wall of the lens, and the front end surface of the low beam auxiliary protrusion structure is the low beam auxiliary light emitting surface, and the side wall of the low beam auxiliary protrusion structure away from the lens body is a second reflection surface or a second light absorbing surface, and the second reflection surface is configured so that the light received by the lens incident surface and directed toward the second reflection surface is reflected forward toward the low beam auxiliary light emitting surface through the second reflection surface, and is projected forward toward the low beam light pattern area through the low beam auxiliary light emitting surface.

[0012] In some specific embodiments, the lens includes a plurality of lens sub-units, and the zone III light emitting surface is disposed on the upper side walls of at least some of the lens sub-units.

[0013] In some specific embodiments, the angle between the light-emitting surface of zone III and the optical axis of the lens is greater than or equal to 46° and less than or equal to 106°.

[0014] In some specific embodiments, the vertical width of the light emitting surface of zone III is greater than or equal to 0.01 mm and less than or equal to 1 mm.

[0015] In some specific embodiments, a lens mounting portion is disposed on the upper side wall of the lens, and the light emitting surface of zone III is disposed at the junction of the upper side wall of the lens and the lens mounting portion.

[0016] In some specific embodiments, the lens mounting portion is a black mounting portion.

[0017] In some specific embodiments, the lens mounting portion and the lens are integrally formed.

[0018] A second aspect of the present invention provides a lens, which is the lens in the above-mentioned low beam module.

[0019] A third aspect of the present invention provides a vehicle lamp, comprising the above-mentioned low beam module.

[0020] Through the above scheme, the beneficial effects of the present invention are as follows: In the low beam module provided by the present invention, a zone III light emitting surface is provided on the upper side wall of the lens, and the light emitted by the light source is converged by the primary optical element and then emitted to the light incident surface of the lens, wherein most of the light is emitted through the light emitting surface of the lens to form a low beam light pattern, and at least part of the light transmitted forward and upward is projected through the zone III light emitting surface to form a low beam zone III light pattern, thereby eliminating the need to provide an optical structure that affects the appearance aesthetics on the light incident surface and the light exit surface of the lens, and eliminating the need to additionally provide optical elements on the low beam light path, thereby not occupying the internal space of the headlight module and effectively controlling the product cost.

[0021] In addition, low beam auxiliary light-emitting surfaces are provided on the left and right side walls and the lower side wall of the lens, so that at least part of the light received by the lens light incident surface and transmitted forward and to the left, right and downward is projected through the low beam auxiliary light-emitting surfaces to the left edge area, right edge area and lower edge area of ​​the low beam light pattern, thereby widening the left and right sides and the lower side of the low beam light pattern and improving night driving safety.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 is a component exploded view of a specific embodiment of the low beam module of the present invention; Figure 2 is a structural schematic diagram of a specific implementation of a lens; Figure 3 is a cross-sectional schematic diagram of a low beam module of the present invention; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 is a structural schematic diagram of another specific implementation of the lens; Figure 6 is a schematic structural diagram of a specific implementation of a primary optical element; Figure 7 yes Figure 6 Enlarged view of point B in the middle; Figure 8 yes Figure 3 Enlarged view of point C in the middle; Fig. 9 is a light path schematic diagram of a specific implementation method in which the upper side wall of the protruding structure in zone III is the first reflection surface; Fig.10 yes Figure 8 A schematic diagram of the light path of a specific implementation method of the low beam auxiliary protrusion structure at the magnified viewing angle of the structure at E in the middle, where the side wall away from the lens body is the second reflective surface.

[0024] Description of Reference Numerals Tag Name 1. Light source; 2. Primary optical element; 201. Main reflecting surface; 202. Zone III reflecting surface; 3. Lens; 301. Lens light incident surface; 302. Lens light emitting surface; 303. Zone III light emitting surface; 304. Zone III raised structure; 305. First reflecting surface; 306. Low beam auxiliary light emitting surface; 307. Low beam auxiliary raised structure; 308. Second reflecting surface; 309. First light absorbing surface; 3010. Second light absorbing surface; 3a. Lens subunit; 4. Lens mounting part; 5. Circuit board; 6. Radiator. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0026] The present invention provides these embodiments to make the present invention thorough and complete, and fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limiting.

[0027] It should be noted that, in order to facilitate the description of the present invention and simplify the description, in general, the setting orientation of the headlight module is roughly the same as when the headlight is actually used on the vehicle, for example, the lens is in the front, and correspondingly, the primary optical element (such as the concentrator) is in the back, and the horizontal arrangement of each unit optical system means that each unit optical system is arranged roughly along the left-right direction, and the vertical arrangement means roughly along the up-down direction. In the description of the present invention, the indicated orientation or position relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0028] In addition, words such as “include” or “comprises” and the like used in the present invention mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of also including other elements.

[0029] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0030] All terms used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0032] The first aspect of the present invention provides a low beam module, see Figure 1-Figure 4As a basic embodiment of the low beam module of the present invention, the low beam module includes a light source 1, a primary optical element 2 and a lens 3, the lens 3 includes a lens light incident surface 301 and a lens light emitting surface 302, the light emitted by the light source 1 is suitable for being converged by the primary optical element 2 and emitted to the lens light incident surface 301, and then emitted from the lens light emitting surface 302 to form a low beam light pattern; wherein, a zone III light emitting surface 303 is provided on the upper side wall of the lens 3, and the zone III light emitting surface 303 is configured as follows: at least part of the light received by the lens light incident surface 301 and transmitted forward and upward is projected through the zone III light emitting surface 303 to form a low beam zone III light pattern.

[0033] Based on the basic embodiment of the low beam module described above, the light emitted by the light source 1 is converged by the primary optical element and then emitted to the light incident surface 301 of the lens, wherein most of the light is transmitted forward to the light exit surface 302 of the lens, and is projected through the light exit surface 302 of the lens to form a low beam light pattern, and there is a small portion of the light that is transmitted obliquely upward (forward and upward), and at least part of the light in this small portion of light is transmitted to the light exit surface 303 of zone III, and is projected through the light exit surface 303 of zone III to form a low beam zone III light pattern, and since the light exit surface 303 of zone III is located on the upper side wall of the lens 3, the light exit surface 303 of zone III It is not located on the lens light incident surface 301 or the lens light exit surface 302, and it does not affect the appearance surface of the lens 3 (the lens light incident surface 301 and the lens light exit surface 302). When observing the headlight provided with the low beam module from the outside of the vehicle, the appearance surface of the lens 3 observed does not have any optical structure that affects the appearance aesthetics, thereby meeting the appearance aesthetics requirements of the automobile headlight; and no additional optical elements are arranged on the low beam light path, thereby not increasing the internal space occupied by the headlight module, thereby meeting the demand for miniaturization of the headlight and effectively controlling the product production cost.

[0034] In some specific embodiments of the low beam module of the present invention, see Figure 1-Figure 4 A zone III protrusion structure 304 is formed on the upper side wall of the lens 3, so that the upper side wall of the lens 3 is in a step shape. The front end surface of the zone III protrusion structure 304 is the zone III light emitting surface 303. The light transmitted obliquely upward and received by the lens light incident surface 301 can be emitted through the zone III light emitting surface 303, and then continue to be projected obliquely upward (forward and upward) to above the light cut-off line of the low beam light pattern, forming a low beam zone III light pattern.

[0035] It should be noted that the light projection angle of the zone III light emitting surface 303 can be changed by adjusting the inclination angle of the zone III light emitting surface 303. The inclination angle is the angle α between the zone III light emitting surface 303 and the optical axis of the lens 3. The larger the angle α is, the more the low beam zone III light pattern formed by the light passing through the zone III light emitting surface 303 is directed upward. Therefore, the angle of the light received by the lens light incident surface 301 in actual conditions and transmitted obliquely upward can be reasonably set so that the low beam zone III light pattern formed by the light passing through the zone III light emitting surface 303 is in the designed position. In some specific embodiments, the angle between the zone III light emitting surface 303 and the optical axis of the lens 3 is greater than or equal to 46° and less than or equal to 106°. Preferably, the angle α is 76°. In addition, the light emitting surface 303 of zone III may be a plane or a free-form surface, and the angle between the light emitting surface 303 of zone III and the optical axis of the lens 3 may be: the angle between a straight line formed by fitting a cross-sectional line of the light emitting surface 303 of zone III on a vertical plane where the optical axis of the lens 3 is located and the optical axis, and there are many ways to fit a straight line, for example, connecting the end points of the cross-sectional line to form a straight line.

[0036] It should also be noted that the luminous flux of the low beam zone III light type can be changed by adjusting the vertical width of the zone III light emitting surface 303. The vertical width of the zone III light emitting surface 303 is the height difference between the upper edge and the lower edge of the zone III light emitting surface 303. The larger the vertical width, the larger the luminous flux of the low beam zone III light type formed after the light is projected through the zone III light emitting surface 303. The vertical width of the zone III light emitting surface 303 can be reasonably set according to actual conditions. In some specific embodiments, the vertical width of the zone III light emitting surface 303 is greater than or equal to 0.01 mm and less than or equal to 1 mm. Preferably, the vertical width is 0.15 mm. From the setting range of the vertical width value, it can be seen that the zone III light emitting surface 303 occupies less space on the upper side wall of the lens 3. Therefore, while realizing the low beam zone III light type, the appearance of the lens 3 is not affected.

[0037] In some specific embodiments of the protruding structure 304 in zone III, see Figure 2 The raised structure 304 in zone III extends in the transverse direction, and the two transverse ends of the raised structure 304 in zone III are respectively connected to the edges of the upper side wall of the lens 3 on both sides in the transverse direction, so that the raised structure 304 in zone III is narrow and long, which does not affect the overall appearance of the lens 3.

[0038] It should be noted that the light emitted by the light source 1 is converged by the primary optical element 2 and then emitted to the lens light incident surface 301, so that part of the light is transmitted obliquely upward through the lens light incident surface 301, and this part of the light is emitted to the light exit surface 303 of the zone III. Therefore, the primary optical element 2 needs to allow a small part of the light it converges to be transmitted obliquely upward after passing through the lens light incident surface 301 and to be emitted exactly to the light exit surface 303 of the zone III; specifically, see Figure 3 , Figure 6 and Figure 7 The primary optical element 2 is a reflector, and a zone III reflective surface 202 is provided on the main reflective surface 201 of the reflector. The zone III reflective surface 202 is configured such that part of the light emitted by the light source 1 is suitable for being reflected by the zone III reflective surface 202 and then transmitted forward and upward, and then refracted by the lens light incident surface 301 and then transmitted to the zone III light emitting surface 303; wherein, Figure 3 As shown, the reflector as a whole can be gradual and smooth, that is, the connection between the main reflective surface 201 and the zone III reflective surface 202 has a curvature transition. The gradual and smooth reflective surface is conducive to the production and manufacturing of the reflector, and the structure is more stable and reliable; the reflector as a whole can also be spliced ​​by splicing the main reflective surface 201 and the zone III reflective surface 202, such as Figure 7 As shown, the joint of the reflective surfaces is abrupt and non-smooth, and since the connection between the main reflective surface 201 and the zone III reflective surface 202 does not undergo a curvature transition, the main reflective surface 201 can reflect more of the received light toward the lens light-emitting surface 302, and the zone III reflective surface 202 can reflect more of the received light toward the zone III light-emitting surface 303, thereby reducing the unutilized light caused by the curvature transition connection and improving the light utilization rate. The primary optical element 2 is a reflector which is only a specific embodiment of the low beam module of the present invention, and is not a limitation on the protection scope of the low beam module of the present invention. It should be understood that there are various ways in which the light emitted by the light source 1 passes through the primary optical element 2 to form a small portion of light emitted obliquely upward. For example, the primary optical element 2 is a light guide, which has two light emitting surfaces, one light emitting surface is a main light emitting surface for forming a low beam light type, and the other light emitting surface is a secondary light emitting surface for forming a low beam zone III light type. There is an inclination angle between the secondary light emitting surface and the optical axis of the light guide, so that a small portion of the light is refracted at the secondary light emitting surface so as to be able to be transmitted obliquely upward; or, the light source 1 includes a main light source and a secondary light source, and the primary optical element 2 includes a main primary optical element and a secondary primary optical element, the main primary optical element is arranged corresponding to the main light source, so as to be suitable for forming a convergent light projected toward the low beam light type, and the secondary primary optical element is arranged corresponding to the secondary light source, so as to be suitable for forming a light that is transmitted obliquely upward and finally projected to form a low beam zone III light type.

[0039] See also Figure 3, among the small part of the light rays received by the lens incident surface 301 and transmitted obliquely upward, not all of them are directed to the light exiting surface 303 of zone III, but some of the light rays are directed to the upper and lower sides of the light exiting surface 303 of zone III. In order to avoid the light rays directed to the upper and lower sides from forming stray light, specifically, in order to avoid the light rays directed to the lower side of the light exiting surface 303 of zone III from forming stray light, the upper side wall of the lens 3 is provided with a reflective layer, so that the light rays directed to the lower side of the light exiting surface 303 of zone III are reflected, and the light directed to the lower side of the light exiting surface 303 of zone III is prevented from being emitted from the upper side wall of the lens 3, wherein the upper side wall of the lens 3 may be coated with a reflective coating to form a reflective surface. More preferably, by adjusting the inclination angle of the upper side wall of the lens 3, the incident angle of the light rays directed to the lower side of the light exiting surface 303 of zone III on the upper side wall is greater than the critical angle, thereby causing total internal reflection. In order to avoid the light rays directed to the upper side of the light exiting surface 303 of zone III from forming stray light, see Figure 4 , the upper side wall of the raised structure 304 in zone III is the first reflection surface 305 or the first light absorption surface 309. The upper side wall of the raised structure 304 in zone III can be coated with a light absorption coating to form the first light absorption surface 309, so as to absorb the light directed to the upper side of the light emitting surface 303 in zone III, and avoid the light directed to the upper area of ​​the light emitting surface 303 in zone III from forming stray light. It can be imagined that the upper side wall of the raised structure 304 in zone III can also be provided with patterns and leather grains to dissipate and weaken the generation of stray light; the upper side wall of the raised structure 304 in zone III can be coated with a reflective coating to form a reflection surface, which is the first reflection surface 305, or, by adjusting the inclination angle of the upper side wall of the raised structure 304 in zone III, the incident angle of the light directed to the upper side of the light emitting surface 303 in zone III to the upper side wall of the raised structure 304 in zone III is greater than the critical angle, so that total internal reflection occurs, thereby forming the first reflection surface 305, wherein, see Fig. 9 The first reflecting surface 305 is arranged upwardly and tilted from the back to the front along the optical axis. The first reflecting surface 305 is configured so that the light received by the lens light incident surface 301 and directed toward the first reflecting surface 305 is reflected forward toward the zone III light emitting surface 303 through the first reflecting surface 305, and is projected forward toward the low beam light type area through the zone III light emitting surface 303, which can further improve the light utilization rate and the brightness of the low beam light type.

[0040] In some specific embodiments of the low beam module of the present invention, see Figure 1 , Figure 2 and Figure 5A low-beam auxiliary light-emitting surface 306 is provided on at least one of the two lateral side walls and the lower side wall of the lens 3, that is, a low-beam auxiliary light-emitting surface 306 is provided on the left side wall and / or the right side wall and / or the lower side wall of the lens 3, and the low-beam auxiliary light-emitting surface 306 is configured as follows: at least part of the light received by the lens light incident surface 301 and transmitted forward and toward the low-beam auxiliary light-emitting surface 306 relative to the position of the main body of the lens 3 is projected toward the edge area of ​​the low-beam light pattern through the low-beam auxiliary light-emitting surface 306; specifically, at least part of the light received by the lens light incident surface 301 and transmitted forward and to the left is projected toward the left edge area of ​​the low-beam light pattern through the low-beam auxiliary light-emitting surface 306 located on the left side wall, thereby supplementing the left edge area of ​​the low-beam light pattern, effectively widening the left area of ​​the low-beam light pattern, and effectively improving night driving. During the process, the driver's observation field of view of the left front of the vehicle; at least part of the light transmitted forward and rightward received by the lens light entrance surface 301 is projected toward the right edge area of ​​the low beam light pattern through the low beam auxiliary light emitting surface 306 located on the right side wall, thereby being able to supplement the right edge area of ​​the low beam light pattern, effectively widening the right area of ​​the low beam light pattern, and effectively improving the driver's observation field of view of the right front of the vehicle during night driving; at least part of the light transmitted forward and downward received by the lens light entrance surface 301 is projected toward the lower edge area of ​​the low beam light pattern through the low beam auxiliary light emitting surface 306 located on the lower side wall, thereby being able to supplement the lower edge area of ​​the low beam light pattern, effectively widening the lower area of ​​the low beam light pattern, and effectively improving the driver's observation field of view of the lower front of the vehicle during night driving.

[0041] Furthermore, a low beam auxiliary protrusion structure 307 is formed on at least one of the two lateral sides and the lower side wall of the lens 3, the front end surface of the low beam auxiliary protrusion structure 307 is a low beam auxiliary light emitting surface 306, and the side wall of the low beam auxiliary protrusion structure 307 away from the main body of the lens 3 is a second reflecting surface 308 or a second light absorbing surface 3010, thereby avoiding the light emitted to the left and right sides of the lens 3 to form stray light. Specifically, the side wall of the low beam auxiliary protrusion structure 307 located on the left and / or right side and / or the lower side away from the main body of the lens 3 can be coated with a light absorbing paint to form a second light absorbing surface 3010, thereby absorbing the light emitted to the left and right sides and the lower side; the side wall of the low beam auxiliary protrusion structure 307 located on the left and / or right side and / or the lower side away from the main body of the lens 3. Reflective paint can be coated on the lens 307 to form a total reflection surface, which is the second reflection surface 308. Alternatively, by adjusting the inclination angle of the left and right side walls or the lower side walls of the low beam auxiliary protrusion structure 307, the incident angle of the light directed to the left and right sides or the lower side of the lens 3 to the side wall of the low beam auxiliary protrusion structure 307 is greater than the critical angle, so that total internal reflection occurs, and then the second reflection surface 308 is formed. The second reflection surface 308 is configured so that the light received by the lens light incident surface 301 and directed to the second reflection surface 308 is reflected forward to the low beam auxiliary light emitting surface 306 through the second reflection surface 308, and is projected forward to the low beam light type area through the low beam auxiliary light emitting surface 306, which can further improve the light utilization rate and improve the driver's observation field of the front of the vehicle during night driving. For ease of understanding, see Figure 3 , Figure 8 and Fig.10 Taking the lower side wall of the lens 3 as an example, the front end face of the low beam auxiliary protrusion structure 307 is the low beam auxiliary light emitting surface 306, and the lower side wall is the second reflecting surface 308. Part of the light emitted to the lower side of the lens 3 is emitted to the low beam auxiliary light emitting surface 306, and is refracted by the low beam auxiliary light emitting surface 306 and projected to the lower edge area of ​​the low beam light pattern. There is also part of the light emitted to the lower side of the lens 3, which is reflected by the second reflecting surface 308 and then emitted forward to the low beam auxiliary light emitting surface 306, and continues to be projected forward to the low beam light pattern area through the low beam auxiliary light emitting surface 306.

[0042] As a specific implementation of the lens 3, see Figure 1 and Figure 2 , the lens 3 is a complete lens. After the light emitted by the light source 1 is converged by the primary optical element 2, it only needs to be projected through one lens 3 to form the low beam light type and the low beam zone III light type; as another specific implementation of the lens 3, see Figure 5The lens 3 includes a plurality of lens subunits 3a, and the light rays projected by each lens subunit 3a are combined to form a complete low-beam light pattern, wherein at least a portion of the upper side walls of the lens subunits 3a are provided with a zone III light-emitting surface 303, and the light rays projected by each zone III light-emitting surface 303 are combined to form a complete low-beam zone III light pattern. It should be noted that in the low-beam module of the present application, under the condition of satisfying the luminous flux of the low-beam light pattern, the light source 1 and the primary optical element 2 can be provided in one or more groups, preferably, see Figure 1 There are multiple groups of light sources 1 and primary optical elements 2, and the multiple groups of light sources 1 and primary optical elements 2 are arranged horizontally, corresponding to the narrow and long lenses 3. While meeting the customer's demand for narrow and long car lamp shape, it can also meet the luminous flux requirements of the low beam type.

[0043] In some specific embodiments of the low beam module of the present invention, see Figures 1 to 4 A lens mounting portion 4 is provided on the upper side wall of the lens 3, and the lens mounting portion 4 is used to realize fixed installation of the lens 3. Preferably, the light emitting surface 303 of zone III is provided at the junction of the upper side wall of the lens 3 and the lens mounting portion 4. Specifically, the light emitting surface 303 of zone III and the front end surface of the lens mounting portion 4 can be in the same plane, or the light emitting surface 303 of zone III and the front end surface of the lens mounting portion 4 can be on a surface with continuous curvature, so that the light emitting surface 303 of zone III and the lens mounting portion 4 can visually form a whole, thereby improving the overall appearance of the lens 3.

[0044] It should be noted that, in the above embodiment, the upper side wall of the protruding structure 304 in the region III can be set as the first light absorbing surface 309 to avoid the generation of stray light, see Figure 4 As another specific implementation, the lens mounting portion 4 is a black mounting portion, so that the light emitted toward the upper side of the light emitting surface 303 of zone III can be effectively absorbed.

[0045] In some specific embodiments, the lens mounting portion 4 and the lens 3 are integrally formed parts, which are convenient for manufacturing, production and assembly. The lens mounting portion 4 and the lens 3 can be formed as an integral part by integral injection molding. For example, PMMA (polymethyl methacrylate) material can be used for integral injection molding. When the lens mounting portion 4 is black and the lens 3 is transparent, the lens mounting portion 4 and the lens 3 can be formed as an integral part by a two-color injection molding process, that is, two materials of different colors are injected into the same set of molds, thereby realizing a molding process in which the injection molded parts are formed of two color materials.

[0046] It should be noted that, in the above embodiment, the upper side wall of the lens 3 can form a zone III protrusion structure 304, and the left and right side walls and the lower side wall of the lens 3 can form a low-beam auxiliary protrusion structure 307. Therefore, in order to facilitate manufacturing and improve the appearance, the zone III protrusion structure 304 located on the upper side and the low-beam auxiliary protrusion structure 307 located on the other three sides can be connected to form an annular protrusion structure surrounding the side walls of the lens 3, so that the zone III light-emitting surface 303 and the three low-beam auxiliary light-emitting surfaces 306 form a complete annular surface. At the same time, an installation space for the lens 3 is formed in the middle of the lens mounting portion 4, and the complete annular surface is arranged at the junction of the lens mounting portion 4 and the lens 3, thereby further improving the appearance of the lens 3.

[0047] In order to facilitate understanding of the technical solution of the low beam module of the present invention, the following is an explanation in combination with relatively preferred technical features.

[0048] See also Figures 1 to 4The low beam module of the present invention comprises a light source 1, a primary optical element 2, a lens 3, a lens mounting portion 4, a circuit board 5 and a heat sink 6. The primary optical element 2 is a reflector. The light source 1 is arranged on the circuit board 5. The circuit board 5 and the primary optical element 2 are both mounted on the heat sink 6. The lens 3 is mounted on the heat sink 6 through the lens mounting portion 4. The lens 3 comprises a lens light incident surface 301 and a lens light exit surface 302. The light emitted by the light source 1 is suitable for being converged by the primary optical element 2 and then emitted to the lens light incident surface 301. The light incident on the lens 301 is then projected through the light exiting surface 302 of the lens to form a low beam light pattern. A zone III protrusion structure 304 is formed on the upper side wall of the lens 3. The front end surface of the protrusion structure 304 is the zone III light exiting surface 303. At least part of the light transmitted forward and upward received by the lens light incident surface 301 can be projected through the zone III light exiting surface 303 to form a low beam zone III light pattern. A low beam auxiliary protrusion structure 307 is formed on the left side wall, the right side wall and the lower side wall of the lens 3. The low beam auxiliary protrusion structure 307 The front end surface is the low beam auxiliary light emitting surface 306, and the light received by the lens light incident surface 301 and transmitted forward and respectively to the left, right and downward is projected to the left edge area, right edge area and lower edge area of ​​the low beam light pattern through the low beam auxiliary light emitting surface 306 on the corresponding side, effectively widening the low beam light pattern, which can effectively improve the driver's observation field of view of the lower front of the vehicle during night driving; and the zone III protrusion structure 304 and the low beam auxiliary protrusion structure 307 form an annular protrusion structure surrounding the side walls of the lens 3, so that the zone III light emitting surface 303 and the three low beam auxiliary light emitting surfaces 306 form a complete annular surface, which is arranged at the junction of the lens mounting part 4 and the lens 3, thereby further improving the appearance of the lens 3, and the lens mounting part 4 is a black mounting part, which can effectively absorb light emitted to the side and avoid the generation of stray light. The lens 3 and the lens mounting part 4 are formed as an integral part by a two-color injection molding process, which is convenient for manufacturing, production and assembly. Through the above-mentioned embodiments, the low beam module of the present invention does not need to set optical structures that affect the appearance aesthetics on the lens light incident surface 301 and the lens light exit surface 302, and does not need to set additional optical elements on the low beam light path, does not occupy the internal space of the headlight module, and effectively controls the product cost.

[0049] The second aspect of the present invention provides a lens, which is the lens 3 in the low beam module provided by the first aspect of the present invention, and the upper side wall of the lens 3 is provided with a zone III light exiting surface 303, so that the light emitted by the light source is converged by the primary optical element 2 and then emitted to the lens light incident surface 301, wherein most of the light is emitted through the lens light exiting surface 302 to form a low beam light pattern, and at least part of the light transmitted forward and upward is projected through the zone III light exiting surface 303 to form a low beam zone III light pattern, thereby eliminating the need to set an optical structure that affects the appearance on the lens light entrance surface 301 and the lens light exit surface 302, and eliminating the need to set additional optical elements on the low beam light path, thereby not occupying the internal space of the headlight module and effectively controlling the product cost.

[0050] The third aspect of the present invention provides a vehicle lamp, comprising the low beam module provided by the first aspect of the present invention, and therefore, has all the beneficial effects thereof, which will not be described in detail herein.

[0051] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0053] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A low beam module, characterized in that: It comprises a light source (1), a primary optical element (2) and a lens (3), wherein the lens (3) comprises a lens light incident surface (301) and a lens light exit surface (302), and light emitted by the light source (1) is suitable for being converged by the primary optical element (2) and then emitted toward the lens light incident surface (301), and then emitted from the lens light exit surface (302) to form a low-beam light pattern; The upper side wall of the lens (3) is provided with a zone III light emitting surface (303), the zone III light emitting surface (303) is not located on the lens light incident surface (301) or the lens light incident surface (302), and the zone III light emitting surface (303) is configured such that at least part of the light received by the lens light incident surface (301) and transmitted forward and upward is projected through the zone III light emitting surface (303) to form a low beam zone III light pattern.

2. The low beam module according to claim 1, characterized in that: A zone III protruding structure (304) is formed on the upper side wall of the lens (3), and the front end surface of the zone III protruding structure (304) is the zone III light emitting surface (303).

3. The low beam module according to claim 2, characterized in that: The zone III protruding structure (304) extends in the transverse direction, and the two transverse ends of the zone III protruding structure (304) are respectively connected to the edges of the upper side wall of the lens (3) located on both sides in the transverse direction.

4. The low beam module according to claim 1, characterized in that: The primary optical element (2) is a reflector, and a zone III reflective surface (202) is provided on the main reflective surface (201) of the reflector. The zone III reflective surface (202) is configured so that part of the light emitted by the light source (1) is suitable for being reflected by the zone III reflective surface (202) and then transmitted forward and upward, and projected onto the zone III light emitting surface (303) through the lens light incident surface (301).

5. The low beam module according to claim 2, characterized in that: The upper side wall of the zone III protruding structure (304) is a first reflective surface (305) or a first light absorbing surface (309), and the first reflective surface (305) is configured such that the light irradiated toward the first reflective surface (305) and received by the lens light incident surface (301) is reflected forward toward the zone III light emitting surface (303) via the first reflective surface (305), and is projected forward toward the low beam light type area via the zone III light emitting surface (303).

6. The low beam module according to claim 1, characterized in that: A low-beam auxiliary light-emitting surface (306) is provided on at least one of the two lateral side walls and the lower side wall of the lens (3), and the low-beam auxiliary light-emitting surface (306) is configured so that at least part of the light received by the lens light incident surface (301) and transmitted forwards to the low-beam auxiliary light-emitting surface (306) relative to the orientation of the main body of the lens (3) is projected through the low-beam auxiliary light-emitting surface (306) toward an edge region of the low-beam light pattern.

7. The low beam module according to claim 6, characterized in that: A low beam auxiliary protrusion structure (307) is formed on at least one of the two lateral side walls and the lower side wall of the lens (3); the front end surface of the low beam auxiliary protrusion structure (307) is the low beam auxiliary light emitting surface (306); the side wall of the low beam auxiliary protrusion structure (307) away from the main body of the lens (3) is a second reflection surface (308) or a second light absorption surface (3010); the second reflection surface (308) is configured such that the light received by the lens light incident surface (301) and directed toward the second reflection surface (308) is reflected forwards toward the low beam auxiliary light emitting surface (306) via the second reflection surface (308), and is projected forwards toward the low beam light pattern area via the low beam auxiliary light emitting surface (306).

8. The low beam module according to any one of claims 1 to 7, characterized in that: The lens (3) comprises a plurality of lens sub-units (3a), and the upper side walls of at least some of the lens sub-units (3a) are provided with the zone III light exit surface (303).

9. The low beam module according to any one of claims 1 to 7, characterized in that: The included angle between the zone III light emitting surface (303) and the optical axis of the lens (3) is greater than or equal to 46° and less than or equal to 106°.

10. The low beam module according to any one of claims 1 to 7, characterized in that: The vertical width of the zone III light emitting surface (303) is greater than or equal to 0.01 mm and less than or equal to 1 mm.

11. The low beam module according to any one of claims 1 to 7, characterized in that: The upper side wall of the lens (3) is provided with a lens mounting portion (4), and the zone III light exit surface (303) is provided at the junction of the upper side wall of the lens (3) and the lens mounting portion (4).

12. The low beam module according to claim 11, characterized in that: The lens mounting portion (4) is a black mounting portion.

13. The low beam module according to claim 11, characterized in that: The lens mounting portion (4) and the lens (3) are integrally formed parts.

14. A lens, characterized in that: The lens is the lens (3) in the low beam module described in any one of claims 1 to 13.

15. A vehicle lamp, characterized in that: Comprising the low beam module described in any one of claims 1-13.

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