CN114198719A - Lens module and lighting device - Google Patents

Abstract

The application discloses lens module and lighting device, this lens module includes: the imaging lens comprises a lens bracket, and a first converging lens, a first imaging lens and a second converging lens which are sequentially arranged on the lens bracket; the light ray emergent surface of the first converging lens is an arc convex surface, the light ray incident surface and the light ray emergent surface of the first imaging lens are arc concave surfaces, and the light ray incident surface and the light ray emergent surface of the second converging lens are respectively a plane and an arc convex surface. By the mode, the light path can be accurately adjusted to be used for illumination or imaging.

Description

Lens module and lighting device

Technical Field

The application relates to the technical field of lighting equipment, in particular to a lens module and a lighting device.

Background

The lighting device needs to adjust the optical path of the light source by means of a lens and then orderly emit the light. The conventional lens mainly adjusts the optical path by a single lens and changing the position of the lens, but the adjustment of the position of the single lens changes the optical path to a limited extent, and the requirement of precise optical path adjustment is difficult to meet.

Disclosure of Invention

The technical problem that this application mainly solved provides a lens module and lighting device, can carry out the accurate adjustment in order to be used for illumination or formation of image to the light path.

In order to solve the technical problem, the application adopts a technical scheme that: provided is a lens module, including: the imaging lens comprises a lens bracket, and a first converging lens, a first imaging lens and a second converging lens which are sequentially arranged on the lens bracket; the light ray emergent surface of the first converging lens is an arc convex surface, the light ray incident surface and the light ray emergent surface of the first imaging lens are arc concave surfaces, and the light ray incident surface and the light ray emergent surface of the second converging lens are respectively a plane and an arc convex surface.

The lens module further comprises a first filtering lens positioned between the first imaging lens and the second converging lens so as to filter marginal rays.

The light incident surface and the light emergent surface of the first filter lens are arc convex surfaces.

The optical axes of the first converging lens, the first imaging lens, the first filtering lens and the second converging lens are on the same straight line.

The lens support, the first converging lens, the first imaging lens, the second converging lens and the first filtering lens are made of the same transparent material, and the transparent material comprises polycarbonate.

The lens support comprises a first fixing plate body and a second fixing plate body, and the first converging lens, the first imaging lens, the first filtering lens and the second converging lens are fixedly arranged on the first fixing plate body; the second fixed plate body is sleeved on the periphery of the first fixed plate body and is movably connected with the first fixed plate body; the distance between the lens module and the light source is changed by adjusting the relative positions of the first fixing plate body and the second fixing plate body.

The first fixing plate body is movably connected with the second fixing plate body in a threaded mode.

One side of a light incidence surface of the first converging lens is a plane.

The light incidence surface side of the first converging lens is provided with a recess for accommodating a light source.

In order to solve the above technical problem, another technical solution adopted by the present application is: the lighting device comprises any one of the lens modules and at least one light source, wherein one light source is arranged on one side of the light ray outgoing surface which is far away from the first converging lens.

Different from the prior art, the beneficial effects of the application are that: the lens module that this application provided receives light through first convergent lens, reduces the angle between the light, images the light source through first imaging lens, further spotlight through second convergent lens, makes light jet out from the lens module with actual need's angle, carries out the accurate adjustment in order to be used for illumination or formation of image through a plurality of lenses to the light path.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic diagram of an exploded embodiment of the lighting device of the present application;

FIG. 2 is a schematic view of an exploded embodiment of the heat dissipation device of the present application;

FIG. 3 is a schematic structural diagram of an embodiment of a lens module according to the present application;

FIG. 4 is a schematic bottom view of the embodiment of the base shown in FIG. 2;

FIG. 5 is a schematic top view of the embodiment of the base shown in FIG. 2;

FIG. 6 is a schematic structural diagram of an embodiment of a shielding module according to the present application;

FIG. 7 is a schematic structural diagram of another embodiment of a shading module according to the present application;

FIG. 8 is a schematic diagram of an exploded view of an embodiment of a shielding module according to the present application;

FIG. 9 is a schematic side view of an embodiment of a lighting device of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an embodiment of an illumination device according to the present application after explosion, and fig. 2 is a schematic structural diagram of an embodiment of a heat dissipation device according to the present application after explosion. The lighting device 10 includes a heat sink 20, a low beam LED light source 300, a high beam LED light source 302, and a lens module 40. The heat dissipation device 20 includes a base 200, the base 200 includes an upper surface 2000 and a lower surface 2002 that are opposite to each other, and a first side 2004 and a second side 2006 that are opposite to each other, and the first side 2004 is provided with a groove 2008.

Specifically, the upper surface 2000 and the inner wall of the groove 2008 adjacent the second side 2006 are for mounting the low beam LED light source 300 and the high beam LED light source 302, respectively.

Specifically, the low beam LED light sources 300 are mounted to the upper surface 2000 of the base 200 and the high beam LED light sources 302 are mounted to the inner wall of the recess 2008 adjacent the second side 2006.

In one application, please refer to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a lens module 40 of the present application, which includes a lens holder 41, a first focusing lens 42, a first imaging lens 44, and a second focusing lens 46. The first collecting lens 42, the first imaging lens 44 and the second collecting lens 46 are sequentially disposed on the lens holder 41, wherein the light emitting surface 422 of the first collecting lens 42 is a circular arc convex surface, the light incident surface 440 and the light emitting surface 442 of the first imaging lens 44 are circular arc concave surfaces, and the light incident surface 460 and the light emitting surface 462 of the second collecting lens 46 are a plane and a circular arc convex surface, respectively. Specifically, the incident surface and the exit surface of each lens are determined by the position of the light source, and as shown in fig. 3, the light source is disposed at the leftmost side, so that the left side is the incident surface of each lens and the right side is the exit surface of each lens.

Specifically, the light emitted by the light source is in a scattering state, for example, the light emitting angle of the LED light source is greater than 160 °, the first converging lens 42 is closer to the light source, and the light emitted by the light source irradiates the first converging lens 42 at a larger angle. The first converging lens 42 is a convex lens, the light emitting surface 422 of the first converging lens 42 is an arc convex surface, the first converging lens 42 converges light of the light source, and reduces the angle of the light from about 160 degrees to about 60 degrees, the first imaging lens 44 is used for adjusting the light emitted from the light emitting surface 422 of the first converging lens 42, so as to reduce the disorder degree of the light, and at the moment, the light emitted from the light emitting surface 442 of the first imaging lens 44 is projected on a plane to present the basic shape of the light source.

Further, the second converging lens 46 is a single-sided convex lens, and the second converging lens 46 converges the light emitted from the light emitting surface 442 of the first imaging lens 44 such that the angle between the light emitted from the light emitting surface 462 of the second converging lens 46 is less than 2.5 ° to make the light emitted approximately parallel.

Further, the lens module 40 may be sold separately for other devices than the lighting device 10, such as: a projector. The lens module 40 is used for imaging. This mirror module 40 receives light through first convergent lens 42, reduces the angle between the light, images the light source through first imaging lens 44, further spotlight through second convergent lens 46, makes light shoot out from lens module 40 with actual required angle, carries out the accurate adjustment in order to be used for illumination or formation of image through a plurality of lenses to the light path.

Optionally, the lens module 40 further includes a first filter lens 45 located between the first imaging lens 44 and the second converging lens 46, and the first filter lens 45 is used for filtering marginal rays.

Specifically, although the LED light source emits white light to the naked eye, the spectrum of the LED light source is synthesized by exciting a yellow phosphor with blue light to generate white light. The blue light wavelength is between 400nm and 480nm, which is at the edge position in the spectrum, when the light passes through the optical lens, a scattering phenomenon is generated, and because the first imaging lens 44 has a certain diffusion effect on the light, the edge of the light spot includes blue stray light when the light emitted from the light emitting surface 442 of the first imaging lens 44 is irradiated on a plane. The first filter lens 45 has a function of converging light, so that light spots of the light passing through the first filter lens 45 do not include blue stray light any more, and the problem of light dispersion is solved.

Specifically, the light incident surface 450 and the light exit surface 452 of the first filter lens 45 are circular arc convex surfaces. First filter lens 45 is two-sided convex lens, and the circular arc convex surface assembles the effect to light, projects the light in the region that the refraction angle is big regional light spot central zone, and the marginal zone of light spot is projected to the light in the region that the light refraction is little, realizes that different projection light is synthetic, solves the dispersion problem of light, improves the utilization ratio of light.

Alternatively, the optical axes of the first condenser lens 42, the first imaging lens 44, the first filter lens 45, and the second condenser lens 46 are on the same straight line. The optical centers of the first condenser lens 42, the first imaging lens 44, the first filter lens 45 and the second condenser lens 46 are on the same straight line, and the light source is arranged on the straight line and is positioned on the side of the first condenser lens 42 away from the first imaging lens 44. When the central light ray 408 emitted from the light source passes through the optical centers of the first converging lens 42, the first imaging lens 44, the first filter lens 45 and the second converging lens 46, the optical path does not change, and the light rays of other light sources are divided by the central light ray 408, and the first converging lens 42, the first imaging lens 44, the first filter lens 45 and the second converging lens 46 adjust other light rays to be in a symmetrical state, so that the light rays emitted from the light ray emitting surface 462 of the second converging lens 46 are more uniform.

The lens holder 60, the first focusing lens 42, the first imaging lens 44, the first filter lens 45 and the second focusing lens 46 are made of the same transparent material, and the transparent material includes polycarbonate. Among them, polycarbonate has advantages of high strength, high elastic coefficient, high impact strength, wide range of use temperature, high transparency and free dyeability. The transparent material can prevent the color of the light source from generating chromatic aberration, thereby preventing the color of the light source from being distorted due to the colors of the lens and the lens support 41.

Specifically, the lens holder 41 includes a first fixing plate 410 and a second fixing plate 412, and the first collecting lens 42, the first imaging lens 44, the first filter lens 45, and the second collecting lens 46 are fixedly disposed on the first fixing plate 410. The second fixing plate 412 is sleeved on the periphery of the first fixing plate 410 and movably connected to the first fixing plate 410, and the distance between the lens module 40 and the light source is changed by adjusting the relative positions of the first fixing plate 410 and the second fixing plate 412.

Specifically, the light source is disposed on the second fixing plate 412, and the second fixing plate 412 can move relative to the first fixing plate 410, so that the distance between the light source and the lens module 40 can be adaptively adjusted for light sources with different sizes and shapes, so as to widen the application range of the lens module 40.

Optionally, a sliding groove (not labeled) and a buckle corresponding to the sliding groove may also be disposed on the first fixing plate 410, so that the distances between the first collecting lens 42, the first imaging lens 44, the first filter lens 45 and the second collecting lens 46 can be relatively adjusted, so as to adjust the positions between the lenses during imaging, thereby meeting the imaging requirements at different distances.

Specifically, the first fixing plate 410 and the second fixing plate 412 are movably connected by a screw. Furthermore, a scale may be disposed on the first fixing plate 410 to provide a reference for adjusting the position of the second fixing plate 412. The screw connection can facilitate the position change between the first fixing plate 410 and the second fixing plate 412, and the adjustment of the relative position can be arbitrarily adjusted within the range of the length of the side wall of the second fixing plate 412.

In a specific application scenario, the light incident surface 420 side of the first converging lens 42 is a plane. When the position between the first fixing plate 410 and the second fixing plate 412 is adjusted, the light source and the first condensing lens 42 are maintained to have a space therebetween, and the flat light incident surface 420 of the first condensing lens 42 provides a reference plane for the position change between the first fixing plate 410 and the second fixing plate 412.

In another specific application scenario, the light incident surface 420 side of the first converging lens 42 has a recess (not labeled) for accommodating the light source. When the position between the first fixing plate 410 and the second fixing plate 412 is adjusted, the light source moves to a recessed position on the light incident surface 420 of the first condensing lens 42, so that the light of the light source sufficiently passes through the first condensing lens 42. In other embodiments, the first focusing lens 42 may be omitted, and a transparent high temperature resistant material, such as a fluorescent gel, may be dispensed on the light source to form a similar convex lens on the light source, which completely encapsulates the light source.

Referring to fig. 1, when the lens module 40 is applied to the lighting device 10, the lighting device 10 includes at least one light source. Specifically, the lens module 40 may be disposed on the high beam LED light source 302, the high beam LED light source 302 is disposed on a side of the light exit surface 422 away from the first focusing lens 42, the high beam LED light source 302 is disposed on the second fixing plate 412, and the groove 2008 on the base 200 is further used for accommodating the lens support 41 of the lens module 40.

Further, the lighting device 10 further includes a reflective cup 304, the reflective cup 304 is covered above the low-beam LED light source 300, an opening (not shown) is disposed at a position of the reflective cup 304 corresponding to the high-beam LED light source 302, and a focal point of the reflective cup 304 and the first convex surface 404 coincides with a focal point of the second convex surface 406. The light emitted from the low beam LED light source 300 is reflected by the reflective cup 304 and emitted from the opening of the reflective cup 304 to the near end, so that when the lighting device 10 is switched to the near light mode, the light is emitted to the near end. Moreover, the focal points of the reflective cup 304 and the first convex surface 404 are overlapped with the focal point of the second convex surface 406, so that the light of the high beam LED light source 302 and the light of the low beam LED light source 300 of the lighting device 10 are emitted from the opening of the reflective cup 304, and are converged at the outer side of the reflective cup 304 to reach an optimal state, so that the compensation effect of the light of the low beam LED light source 300 on the light in the high beam mode is strongest.

Further, referring to fig. 2 again, in combination with fig. 4 and 5, fig. 4 is a schematic structural diagram of a bottom view of an embodiment of the base in fig. 2, and fig. 5 is a schematic structural diagram of a top view of an embodiment of the base in fig. 2. The heat sink 20 further includes a heat pipe 202, heat dissipating fins 204, and a heat dissipating fan 206. The heat pipe 202 is located in the heat pipe container 2010. The heat dissipating fins 204 are disposed on the lower surface 2002 of the base 200, the heat dissipating fan 206 is disposed on one side of the lower surface 2002 and adjacent to the heat dissipating fins 204, and at least one hole 20020 penetrating through the lower surface 2002 is disposed at a position of the bottom wall of the groove 2008 corresponding to the heat dissipating fan 206. The position corresponding to the hole 20020 seen from the bottom view is the bottom wall of the groove 2008.

Specifically, when the low-beam LED light source 300 and the high-beam LED light source 302 are turned on, the heat of the light sources is rapidly transferred to the outside of the base 200 through the heat pipe 202, the heat dissipation fins 204 also receive the heat transferred from the low-beam LED light source 300 and the high-beam LED light source 302 and the heat pipe 202, and the heat dissipation fins 204 have spaced gaps therebetween, under the action of the heat dissipation fan 206, the airflow blown by the heat dissipation fan 206 flows upward from the hole 20020 on the lower surface 2002 of the base 200, acts on the low-beam LED light source 300 and the high-beam LED light source 302, is reflected by the upper surface 2000 of the base 200, and completely acts in the entire heat generation space from bottom to top, the heat is dissipated outward through the heat pipe 202 and the heat dissipation fins 204, and the airflow carrying the heat is rapidly discharged from the gaps between the heat dissipation fins 204, thereby achieving the effect of rapid heat dissipation.

In the heat dissipation device 20 provided in this embodiment, after the airflow passing through the heat dissipation fan 206 fully acts on the heat source, the heat is conducted out through the heat pipe 202 and the heat dissipation fins 204, and the airflow passing through the heat dissipation fan 206 is discharged from between the heat dissipation fins 204 through the heat dissipation fins 204, so that the heat inside the heat dissipation device 20 is discharged as soon as possible, thereby reducing the risk of spontaneous combustion of the heat source.

Specifically, the groove 2008 is connected to the upper surface 2000, and an included angle formed between the upper surface 2000 of the base 200 and an inner wall of the groove 2008 adjacent to the second side 2006 is an obtuse angle. That is, when the upper surface 2000 is the reference plane, the groove 2008 is not perpendicular to the upper surface 2000, when the upper surface 2000 is horizontally disposed, the inner wall of the groove 2008 close to the second side 2006 forms an obtuse angle with the upper surface 2000, and after passing through the lens module 40, the light of the high beam LED light source 302 disposed in the groove 2008 is emitted at an upward angle, so that the illumination range of the illumination apparatus 10 in the high beam mode is wider.

Further, the heat pipe container 2010 and the heat pipe 202 are U-shaped. The heat pipe 202 may have an axisymmetrical structure, and the heat pipe accommodating groove 2010 corresponds to the structure of the heat pipe 202. The working liquid in the heat pipe 202 is heated and evaporated to take away heat, and the U-shaped structure exposes the light source emitting heat except the position where the light exits, and surrounds the light source in other directions, so that the heat pipe 202 can achieve the best heat dissipation effect on the heat source. Of course, in other embodiments, the heat pipe 202 may have an asymmetric structure, and the installation position and the installation manner of the heat pipe 202 determine the shape of the heat pipe 202.

Specifically, a closed cavity (not labeled) is disposed in the heat pipe 202, the cavity is filled with a cooling liquid, and a capillary core layer (not labeled) is disposed on an inner wall of the cavity. The heat pipe 202 adopts a phase-change heat dissipation mode and a capillary structure transmission principle, the cooling liquid is absorbed in the capillary core layer on the inner wall of the cavity, when the light source emits light to generate heat, the part of the upper side wall of the cavity, which is close to the light source, is heated to raise the temperature, the cooling liquid absorbed on the capillary core layer at the part absorbs heat to be gasified, and the gasified cooling liquid overflows from the capillary core layer and flows to the other parts of the cavity. Meanwhile, as the heat dissipation fins 204 and the heat dissipation fan 206 generate air convection on the other side of the heat pipe 202, the temperature of the lower sidewall of the cavity is reduced, so that the gasified cooling liquid releases heat, condenses and liquefies at the lower sidewall of the cavity at a low temperature, the liquefied cooling liquid is absorbed into the capillary core layer of the lower sidewall of the cavity, and the cooling liquid around the lower sidewall of the cavity is promoted to flow to the upper sidewall of the cavity. Thereby completing a heat dissipation cooling cycle.

Optionally, the heat pipe 202 with temperature-changing property may be selected, so that the thermal resistance of the condensation section decreases with the increase of the heating amount and increases with the decrease of the heating amount, and thus, under the condition that the heating amount of the heat pipe 202 is greatly changed, the change of the steam temperature is extremely small, so as to improve the heat dissipation effect.

Further, light source mounting grooves 2012 are respectively disposed on two opposite sides of the middle area of the heat pipe 202, and the bottoms of the light source mounting grooves 2012 are higher than the upper surface 2000 of the heat pipe 202, or the bottoms of the light source mounting grooves 2012 are flush with the upper surface 2000 of the heat pipe 202, so that the low-beam LED light sources 300 are mounted on the upper surface 2000 of the heat pipe 202 in a bridging manner. The low-beam LED light source 300 is disposed above the middle line of the U-shaped heat pipe 202, a gap or contact is formed between the low-beam LED light source 300 and the heat pipe 202, and the low-beam LED light source 300 is used as a heat source and is located near the heat pipe 202 and at the center line of the U-shaped heat pipe 202, so that heat of the low-beam LED light source 300 is dissipated to the outside as soon as possible through the bent portion of the U-shaped heat pipe 202.

Further, the heat dissipation device 20 further includes a heat pipe fixing member 208, and the heat pipe fixing member 208 is located on the upper surface 2000 of the heat pipe 202 except for the middle region, and is used for fixing the position of the heat pipe 202. The heat pipe fixing members 208 correspond to two branches of the U-shaped heat pipe 202, two heat pipe fixing members 208 are respectively disposed on two sides of the boundary of the middle line of the heat pipe 202, and the heat pipe fixing members 208 do not affect the middle area of the heat pipe 202, and further do not affect the installation position of the light source and the emitting position of the light.

Further, the heat pipe fixing member 208 and the base 200 clamp the heat pipe 202 and are fixed to the base 200, so that the heat pipe 202 is fixed to the base 200, and the probability of deviation and even breakage of the heat pipe 202 caused by vibration is reduced, so as to improve the stability of the heat pipe 202, and further, the heat pipe fixing member is suitable for a bumpy environment.

Specifically, the heat pipe fixing member 208 includes a first portion 2080 having the same shape as the heat pipe accommodating groove 2010 at a corresponding position thereof, and a second portion 2082 extending horizontally from a side surface of the first portion 2080, and a fixing groove 2014 is provided at a position on the upper surface 2000 of the base 200 corresponding to the second portion 2082, wherein the first portion 2080 is located in the heat pipe accommodating groove 2010, and the second portion 2082 is located in the fixing groove 2014 and is fixedly connected to the fixing groove 2014.

Specifically, the first portion 2080 of the heat pipe fixing member 208 corresponds to the heat pipe accommodating groove 2010, covers the surface of the heat pipe 202 and is located in the heat pipe accommodating groove 2010, the first portion 2080 fills the heat pipe accommodating groove 2010 to make the surface of the heat pipe accommodating groove 2010 relatively flat, and the first portion 2080 can protect the surface of the heat pipe 202 to reduce the probability of the surface of the heat pipe 202 being pierced or cracked after collision. The second portion 2082 of the heat pipe fixing member 208 corresponds to the fixing groove 2014, is located in the fixing groove 2014 after being fixed, and is fixed to the base 200 by using a bolt through a through hole (not labeled) in the second portion 2082, so as to tightly clamp the heat pipe 202, so that the heat pipe 202 is stably connected, and the heat pipe 202 is convenient to replace and maintain, and is simultaneously suitable for application scenarios with higher requirements on structural stability, such as lighting devices of automobiles or locomotives.

Further, referring to fig. 4 and 5, a spacer (not labeled) is disposed between the light source mounting groove 2012 and the inner wall of the recess 2008 near the second side 2006, the heat dissipation fan 206 covers the spacer, and a plurality of noise reduction air outlets 2016 are disposed at positions of the base 200 corresponding to the spacer.

Specifically, the noise reduction air outlet 2016 penetrates through the bottom of the base 200, and is positioned between the low-beam LED light source 300 and the high-beam LED light source 302, so that the flowing distance of the air flow can be reduced, the outflow efficiency of the air flow is improved, and the noise caused by the air flow is reduced. When the airflow blown by the heat dissipation fan 206 acts on the low-beam LED light source 300 and the high-beam LED light source 302, the airflow carrying heat flows out from the noise reduction air outlet 2016 between the low-beam LED light source 300 and the high-beam LED light source 302 as soon as possible, which not only improves the heat dissipation efficiency, but also reduces the noise caused by the airflow flowing.

Further, at least a portion of the cooling fins 204 are V-shaped and extend from the second side 2006 to the adjacent third side 2020 or fourth side 2022, or from the third side 2020 to the opposite fourth side 2022. Specifically, the heat dissipation fins 204 near the first side 2004 are symmetrically arranged in a V-shaped configuration, and the heat dissipation fins 204 near the first side 2004 are located at the middle of the bottom of the base 200, which not only assists in heat dissipation, but also enhances the bottom structure, so that the overall structure of the base 200 is more reliable and stable. One end of the radiator fin 204 close to the second side 2006 is perpendicular to the second side 2006, and the other end extends to the adjacent third side 2020 or fourth side 2022, so that the radiator fin 204 is arranged on the side of the base 200. When the heat dissipation fins 204 are viewed from the bottom, the heat dissipation fins 204 are axially symmetric, and the heat dissipation fins 204 are provided with reinforcing structures (not labeled) at intervals, so as to improve the structural strength of the base 200 and the heat dissipation fins 204, so that the base 200 and the heat dissipation fins 204 are more stable and can be suitable for environments with larger vibration amplitude.

Further, the height of the heat dissipation fins 204 near the third side 2020 and the fourth side 2022 is greater than the height of the heat dissipation fins 204 at other positions, so as to form a heat dissipation fan mounting groove 2024 on the heat dissipation fins 204, and the heat dissipation fan 206 is fixedly disposed in the heat dissipation fan mounting groove 2024. That is, the height of the heat dissipating fins 204 outside the position circled by the large dashed line in fig. 4 is greater than the height of the heat dissipating fins 204 inside the heat dissipating fins, and the heat dissipating fan mounting groove 2024 provides a receiving space for the heat dissipating fan 206, so that the bottom of the base 200 is relatively flat after the heat dissipating fan 206 is mounted, so that the entire heat dissipating device 20 is more stably horizontally disposed.

Alternatively, the base 200 and the heat dissipation fins 204 are integrally formed by die casting. The base 200 and the heat dissipation fins 204 are integrally formed by die casting through opening corresponding dies. Compared with the welding or riveting mode, the integrally formed base 200 and the radiating fins 204 have better radiating effect and more stable structure, reduce the number of accessories and reduce errors caused by the process, and can also reduce the production cost when the demand of the radiating device 20 is larger.

Further, referring to fig. 1 and 2, the heat dissipation device 20 further includes a mounting plate 210, the mounting plate 210 is fixedly disposed on an outer edge of the first side 2004 of the base 200, an opening (not shown) is disposed in the middle of the mounting plate 210, and a plurality of mounting holes (not shown) are disposed on the mounting plate 210. The light emitted from the low beam LED light source 300 and the high beam LED light source 302 is transmitted through the opening, and the mounting holes on the mounting plate 210 provide mounting holes for other devices.

Specifically, the mounting holes at each top corner of the mounting plate 210 are reserved for fixing the whole lighting device 10 or the heat sink 20 to the vehicle body or the utility pole.

Further, the heat dissipation device 20 further includes an electrical mounting base 212, the electrical mounting base 212 is used for receiving a control circuit board (not labeled) and a connection terminal, and the electrical mounting base 212 is located on the second side 2006 of the base 200 and fixed to the lower surface 2002 of the base 200.

In a specific application scenario, when the lighting device 10 is used on a locomotive, the electrical mounting base 212 is disposed near a power source in the locomotive, and the control circuit board in the electrical mounting base 212 is powered from the locomotive body to supply power to the heat dissipation fan 206, the high beam LED light sources 302 and the low beam LED light sources 300.

In another specific application scenario, when the lighting device 10 is used for field lighting, the electrical mounting base 212 is disposed near a power source in a utility pole, and the control board in the electrical mounting base 212 has a voltage conversion circuit to convert ac power to dc power for the heat dissipation fan 206, the high beam LED light sources 302 and the low beam LED light sources 300.

Further, referring to fig. 1 again, the lighting device 10 further includes a shielding module 50, and the shielding module 50 is located in a direction away from the high beam LED light source 302 of the lens module 40 and is used for shielding the light emitted from the high beam LED light source 302. When the lighting device 10 is in operation, the high beam LED light source 302 and the low beam LED light source 300 are simultaneously turned on, when the lighting device 10 is switched to the low beam mode, the shielding module 50 shields the light emitted from the high beam LED light source 302, and when the lighting device 10 is switched to the high beam mode, the shielding module 50 does not shield the light emitted from the high beam LED light source 302.

Referring to fig. 6 and 7, fig. 6 is a schematic structural diagram of an embodiment of a shielding module of the present application, and fig. 7 is a schematic structural diagram of another embodiment of the shielding module of the present application. The shielding module 50 includes a fixing base 500, a shielding plate 502, a coil 504, a magnetic push rod 506, and an elastic member 508. The light shielding plate 502 is pivoted to the fixing seat 500, the magnetic push rod 506 is inserted into the coil 504, the coil 504 is fixedly disposed on the fixing seat 500, one end of the magnetic push rod 506 is located in the coil 504, the other end of the magnetic push rod 506 is located outside the coil 504 and is fixedly connected with the light shielding plate 502, the other end of the magnetic push rod 506 is provided with a first abutting portion 5060, and the elastic member 508 is located on the periphery of the exposed magnetic push rod 506 between the first abutting portion 5060 and the coil 504.

Specifically, when the coil 504 is energized, the magnetic field generated by the coil 504 drives the other end of the magnetic push rod 506 to be close to the coil 504, the magnetic push rod 506 drives the light blocking plate 502 to rotate, so that the light blocking plate 502 does not block the light emitted by the high beam LED light source 302, when the coil 504 is not energized, the other end of the magnetic push rod 506 is away from the coil 504 under the action of the elastic member 508, and the magnetic push rod 506 drives the light blocking plate 502 to rotate, so that the light blocking plate 502 returns to the original position to block the light emitted by the high beam LED light source 302.

Specifically, the light shielding plate 502 at least partially corresponds to the opening on the mounting plate 210, the magnetic field generated by the coil 504 drives the end of the magnetic push rod 506 provided with the first abutting portion 5060 to move close to the coil 504, so that the light shielding plate 502 is driven by the first abutting portion 5060 to move in the direction close to the coil 504, and further light emitted by the high beam LED light source 302 is not blocked, and when the end of the magnetic push rod 506 provided with the first abutting portion 5060 moves close to the coil 504, the elastic member 508 also buffers the movement of the magnetic push rod 506 to a certain extent. When the coil 504 is powered off, the magnetism disappears, the elastic member 508 pushes the magnetic push rod 506 after stretching, and then the light shielding plate 502 can be pushed back to the position for shielding the high beam LED light source 302, and other power devices are not needed to return the light shielding plate 502 to the original position, so that the whole shielding module 50 is simple in structure and convenient to use.

It can be understood that, when the low beam LED light source 300 and the high beam LED light source 302 are turned on simultaneously after the power is turned on, the light of the low beam LED light source 300 is reflected by the reflective cup 304 and illuminates from the opening of the reflective cup 304 to the near end, and the shielding module 50 shields the high beam LED light source 302, then the lighting device 10 is in the low beam mode. When the user selects to switch to the high beam state, the position of the shielding module 50 is adjusted, so that the shielding module 50 does not shield the light of the high beam LED light source 302, the light of the high beam LED light source 302 is emitted after calibration, and the lighting device 10 is switched to the high beam mode, and the low beam LED light source 300 still maintains the working state, so as to compensate the light near the lighting device 10 in the high beam mode, and improve the illumination intensity near the illumination range of the lighting device 10 in the high beam mode, so that the lighting device 10 still has the illumination of 1200Lux when the illumination distance is 1 km in the high beam mode.

It can be understood that the high beam and low beam mode can be switched conveniently by the shielding module 50, the high beam and low beam mode switching can be realized without changing the working states of the low beam LED light source 300 and the high beam LED light source 302, and the times of opening and closing the low beam LED light source 300 and the high beam LED light source 302 can be reduced, so as to reduce the probability of damage to the low beam LED light source 300 and the high beam LED light source 302 caused by multiple times of turning on or turning off.

In the shielding module 50 provided in this embodiment, the magnetic field generated after the coil 504 is powered on drives the magnetic push rod 506 to move in a direction close to the coil 504, so that the light shielding plate 502 does not shield the light emitted by the light source, and the elastic member 508 pushes the magnetic push rod 506 back to the original position after the coil 504 is powered off, so that the light shielding plate 502 shields the light of the light source, and the whole shielding module 50 is simple and the position of the light shielding plate 502 can be switched quickly and conveniently.

Specifically, the elastic member 508 is a spring, the material of the elastic member 508 is simple and low-cost, and the supply of parts is guaranteed when the shading module 50 is manufactured.

Alternatively, the inner diameter of the spring gradually decreases in a direction approaching the first butting portion 5060. The first abutting portion 5060 is circular, and the inner diameter of the end of the spring close to the first abutting portion 5060 is smaller than or equal to the inner diameter of the first abutting portion 5060. The inner diameter of the spring increases gradually towards the end far away from the first abutting portion 5060, and abuts against the fixing base 500. The inner diameter of the end of the spring abutted against the fixing seat 500 is larger, and compared with a spring with the same inner diameter, the spring is not easy to shift and deform after being deformed for many times, so that the reliability of the shielding module 50 is improved.

Specifically, referring to fig. 8, fig. 8 is a schematic structural diagram of the shielding module according to an embodiment of the present disclosure after explosion, and the light shielding plate 502 includes a light shielding portion 5020, a connecting portion 5022 and a fixing portion 5024 connected in sequence. The fixing portion 5024 includes a first main body 50240 and first extending portions 50242 extending from two sides of the first main body 50240 toward the magnetic push rod 506. The shielding module 50 further includes a fixing shaft 510, two ends of the fixing shaft 510 are respectively fixedly connected to the first extending portion 50242, and a middle position thereof is fixedly connected to the other end of the magnetic push rod 506. The light shielding portion 5020 corresponds to the position of the high beam LED light source 302, and the connecting portion 5022 connects the fixing portion 5024 and the light shielding portion 5020. The light shielding portion 5020 of the light shielding plate 502 is separated from the fixing portion 5024, and is not an integral structure, so that the light shielding plate 502 is more easily molded. The first extending portion 50242 of the fixing portion 5024 of the light shielding plate 502 is fixedly connected to the fixing shaft 510, and the fixing shaft 510 can be driven by the magnetic push rod 506, so that the light shielding plate 502 pivotally connected to the fixing base 500 can rotate correspondingly along with the movement of the magnetic push rod 506.

Specifically, referring to fig. 6-8, when the magnetic push rod 506 moves toward a side close to the coil 504, that is, the magnetic push rod 506 moves along the direction of arrow a in fig. 6, the fixed shaft 510 also moves along the direction of arrow a along with the movement of the magnetic push rod 506, and then the light shielding plate 502 fixedly connected to the fixed shaft 510 is driven by the fixed shaft 510 to rotate around the point B on the fixed seat 500, so that the light shielding part 5020 rotates to the position shown in fig. 7, and the whole movement process is fast and efficient.

Optionally, referring to fig. 8 again, the other end of the magnetic push rod 506 is further provided with a second abutting portion 5062, the second abutting portion 5062 is far away from the elastic member 508 relative to the first abutting portion 5060, a slot (not labeled) is formed between the first abutting portion 5060 and the second abutting portion 5062, and the fixing shaft 510 is clamped in the slot. The first abutting portion 5060 and the second abutting portion 5062 clamp the fixing shaft 510, so that maintenance is facilitated when the coil 504 or the magnetic push rod 506 fails, the light shielding plate 502 and the fixing shaft 510 do not need to be disassembled, and the coil 504 or the magnetic push rod 506 only needs to be replaced.

In a specific application scenario, the first abutting portion 5060 and/or the second abutting portion 5062 are/is a convex ring, the opposite surfaces of the convex ring-shaped first abutting portion 5060 and the convex ring-shaped second abutting portion 5062 are arc-shaped, and when the convex ring-shaped first abutting portion 5060 and the convex ring-shaped second abutting portion 5062 are assembled with the fixed shaft 510, the fixed shaft 510 is more easily clamped between the first abutting portion 5060 and the second abutting portion 5062, so that the assembling process is more convenient.

In another specific application scenario, the first abutting portion 5060 and/or the second abutting portion 5062 are circular rings, the opposite surfaces of the circular ring-shaped first abutting portion 5060 and the circular ring-shaped second abutting portion 5062 are flat, and when the first abutting portion 5060 and the second abutting portion 5062 which are flat in surface are clamped with the fixing shaft 510, the fixing shaft 510 can be more firmly connected with the first abutting portion 5060 and the second abutting portion 5062.

Further, referring to fig. 6 and 8, the fixing base 500 includes a case 5000 and a fixing plate 5002 fixedly connected to the case 5000, wherein the fixing plate 5002 vertically extends from one side of the case 5000. The box 5000 is used for accommodating the coil 504, a through hole 50000 is formed in the position, corresponding to the magnetic push rod 506, of the box 5000, and the magnetic push rod 506 is inserted into the coil 504 through the through hole 50000. The fixing portion 5024 is pivotally connected to the fixing plate 5002, the fixing plate 5002 is close to the high beam LED light source 302 relative to the light shielding plate 502, and a second groove 50020 is disposed at an upper edge of the fixing plate 5002, so that light of the high beam LED light source 302 can pass through the second groove 50020.

Further, referring to fig. 2 and fig. 8, the fixing plate 5002 is fixedly disposed on the mounting plate 210. The mounting plate 210 has a portion of the mounting holes reserved for fixing the fixing plate 5002 to the mounting plate 210, so that the fixing base 500 is connected to the mounting plate 210 through the fixing plate 5002, and the shielding module 50 is fixed to the mounting plate 210, so that the shielding module 50 can maintain the connection reliability even in an environment with a large vibration amplitude.

Further, when the coil 504 is not energized, the light blocking portion 5020 of the light blocking plate 502 at least partially corresponds to the second recess 50020 on the upper edge of the fixing plate 5002 to block the light of the high beam LED light source 302, and when the coil 504 is energized, the light blocking portion 5020 of the light blocking plate 502 exposes the position of the second recess 50020, and the light emitted by the high beam LED light source 302 is emitted through the second recess 50020.

Further, two second extending portions 50022 extending toward the magnetic push rod 506 side are disposed on the fixing plate 5002 near the magnetic push rod 506 side, and each second extending portion 50022 at least partially abuts against the first extending portion 50242 at the corresponding position. The shielding module 50 further includes a pivot shaft 512, two ends of which are respectively pivoted to the first extending portion 50242 and the second extending portion 50022.

Specifically, the first extending portion 50242 and the second extending portion 50022 are both provided with a through hole (not labeled), the pivot shaft 512 is inserted into the through holes of the first extending portion 50242 and the second extending portion 50022, when the fixed shaft 510 moves along with the magnetic push rod 506, the light shielding plate 502 is driven to move, and the position of the first extending portion 50242 of the fixed portion 5024 on the light shielding plate 502 rotates around the pivot shaft 512.

In a specific application scenario, the pivot shaft 512 includes a U-shaped second main body 5120 and a pivot portion 5122 extending from two ends of the second main body, and the pivot portion 5122 is disposed through the first extending portion 50242 and the second extending portion 50022 at corresponding positions thereof and attached to each other. The U-shaped second body 5120 is integrally disposed on the housing 5000 of the fixing base 500 to make the pivot shaft 512 more stable, and the pivot portion 5122 is disposed through the through holes of the first extending portion 50242 and the second extending portion 50022, so that the first extending portion 50242 of the fixing portion 5024 on the light shielding plate 502 rotates around the pivot portion 5122.

Preferably, the light shielding portion 5020 is arc-shaped, because the light shielding portion 5020 and the fixing portion 5024 are non-integrated structures, the light shielding portion 5020 is also simpler and easier to mold, the light shielding portion 5020 can be molded into a corresponding arc-shaped structure corresponding to the shape of the reflective cup 304, the arc-shaped light shielding portion 5020 can shield most of light emitted by the high beam LED light source 302, and the arc-shaped edge can also transmit part of light to compensate the light of the low beam LED light source 300, so as to improve the illuminance of the lighting device 10 in the low beam mode.

Optionally, a reflective material is disposed on a side of the arc-shaped light shielding portion 5020 close to the high beam LED light source 302, so that light emitted from the high beam LED light source 302 is reflected by the light shielding portion 5020 to the reflective cup 304, and then reflected by the reflective cup 304 to compensate the light of the low beam LED light source 300 in the low beam mode, so as to further improve the illumination of the lighting device 10 in the low beam mode.

In summary, referring to fig. 9, fig. 9 is a schematic structural diagram of a side view angle of an embodiment of the illumination device of the present application, and referring to fig. 1, the lens module 40, the shielding module 50 and the heat dissipation device 20 are integrated to form the illumination device 10 shown in fig. 9, where the illumination device 10 has a good heat dissipation effect and is easy to switch between the distance mode and the near mode.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (10)

1. A lens module, comprising:

a lens holder;

the first converging lens, the first imaging lens and the second converging lens are sequentially arranged on the lens support; the light ray emergent surface of the first converging lens is an arc convex surface, the light ray incident surface and the light ray emergent surface of the first imaging lens are arc concave surfaces, and the light ray incident surface and the light ray emergent surface of the second converging lens are respectively a plane and an arc convex surface.

2. The lens module of claim 1, further comprising:

a first filter lens positioned between the first imaging lens and the second converging lens to filter marginal rays.

3. The lens module of claim 2,

the light incident surface and the light emergent surface of the first filter lens are arc convex surfaces.

4. The lens module of claim 2,

the optical axes of the first converging lens, the first imaging lens, the first filtering lens and the second converging lens are on the same straight line.

5. The lens module of claim 2,

the lens support, the first converging lens, the first imaging lens, the second converging lens and the first filtering lens are made of the same transparent material, and the transparent material comprises polycarbonate.

6. The lens module of claim 2, wherein the lens holder comprises:

the first focusing lens, the first imaging lens, the first filter lens and the second focusing lens are fixedly arranged on the first fixing plate body;

the second fixed plate body is sleeved on the periphery of the first fixed plate body and is movably connected with the first fixed plate body; the distance between the lens module and the light source is changed by adjusting the relative positions of the first fixing plate body and the second fixing plate body.

7. The lens module of claim 6,

the first fixing plate body is movably connected with the second fixing plate body in a threaded mode.

8. The lens module of claim 6 or 7,

one side of a light incidence surface of the first converging lens is a plane.

9. The lens module of claim 1,

the light incident surface side of the first converging lens is provided with a recess for accommodating a light source.

10. An illumination device, comprising:

the lens module of any one of claims 1-9;

at least one light source, wherein one of the light sources is arranged on the side of the light ray outgoing surface which is far away from the first converging lens.

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