Lens capable of being used for switching light condensation and floodlight and lamp

Abstract

The utility model provides a lens capable of being used for switching light condensation and floodlight and a lamp, and relates to the technical field of lighting equipment. The lens main body comprises a light incident surface, the light incident surface is provided with a Fresnel texture surface, the Fresnel texture surface comprises a plurality of convex sawtooth concentric rings which are sequentially and outwards arranged at intervals from the center of the lens main body so as to form a condensation effect when light is incident, and each sawtooth concentric ring is defined by uninterrupted convex part sawteeth; the tooth height of the sawtooth concentric ring is gradually reduced from the center of the lens main body to the outside; the portion, located on the outer side of the Fresnel grain road surface, of the light-in face is arranged to be a plane so that the floodlight effect can be achieved when light rays enter the plane. The lens provided by the scheme has a better effect in switching between light condensation and light floodlight.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting equipment, in particular to a lens and a lamp which can be used for switching between focusing and flooding. Background Art

[0002] A spotlight is a lamp with a higher illuminance on the designated illuminated surface than the surrounding environment. Usually, it can be aimed in any direction and has a structure that is not affected by climatic conditions. It is mainly used to project a directional, clearly defined beam to illuminate a specific area.

[0003] Floodlights produce highly diffuse, non-directional light rather than a clear-cut beam of light, so the shadows they produce are soft and transparent. When used to illuminate objects, the lighting fades much more slowly than when used with spotlights. Some floodlights even fade very slowly and look like a light source that produces no shadows and can be used to illuminate the entire scene.

[0004] In order to achieve the switching effect between spotlight and floodlight, the existing lamps generally have two lenses and two light sources. Different light sources are switched to illuminate different lenses to achieve different lighting effects. This results in the need to reserve two lighting positions on the lamp housing, and the switching between the two light effects cannot be achieved through the same lens. This makes the entire lamp larger and inconvenient to carry, and also increases the manufacturing cost. Utility Model Content

[0005] The utility model discloses a lens which can be used for switching between focusing and flooding, aiming to improve the problem that the existing lens has poor switching effect between focusing and flooding.

[0006] The utility model adopts the following scheme:

[0007] The present application provides a lens that can be used to switch between focusing and flooding, including a lens body, the lens body including a light incident surface, the light incident surface being provided with a Fresnel pattern road surface, the Fresnel pattern road surface comprising a plurality of raised serrated concentric rings sequentially arranged outwardly from the center of the lens body at intervals to form a focusing effect when light enters, each of the serrated concentric rings being surrounded by uninterrupted convex serrations, the tooth height of the serrated concentric rings gradually decreasing from the center of the lens body outward; the light incident surface is located on the outer side of the Fresnel pattern road surface and is arranged as a plane to form a flooding effect when light enters.

[0008] Furthermore, the tooth height of the central sawtooth concentric ring is 0.66 mm, the tooth height of the outermost sawtooth concentric ring is 0.40 mm, and they decrease from the inside to the outside.

[0009] Furthermore, the angle between the effective optical surface and the ineffective optical surface of the sawtooth concentric ring is 28°-40°, and the angle gradually increases from the center to the outside.

[0010] Furthermore, the sawtooth concentric ring is one of a circular ring, a square ring, a rectangular ring, a trapezoidal ring, and an elliptical ring.

[0011] Furthermore, the distance between the tooth peaks of adjacent sawtooth concentric rings is 0.31 mm-0.35 mm.

[0012] Furthermore, the light emitting surface and the light incident surface are both matte surfaces to improve the uniformity of the light spot.

[0013] Furthermore, the lens body is extended in all directions to form an extension portion, and the extension portion is suitable for secondary injection molding and sealing with the upper cover of the lamp.

[0014] Furthermore, the angle between the effective optical surface and the axis of the lens body is 24°-35°, and the angle between the ineffective optical surface and the axis of the lens is 4°-7°.

[0015] The utility model also provides a lamp, including a lamp housing, and a light source, a reflector, and a heat sink arranged in the lamp housing, and also includes any one of the above-mentioned lenses that can be used to switch between focusing and flooding, wherein the reflector is arranged between the light source and the lens, the heat sink is connected to the light source to dissipate the heat of the light source, and the light source includes a focusing light source corresponding to the Fresnel pattern road surface and a floodlight light source arranged on the side of the focusing light source to achieve switching between focusing effect and floodlight effect by switching the focusing light source and the floodlight light source on and off.

[0016] Furthermore, a power supply and a PCB board are also arranged in the lamp housing, and a partition is arranged between the power supply and the PCB board to reduce the temperature increased on the PCB board due to discharge.

[0017] Beneficial effects:

[0018] This solution can improve the focusing effect by designing the Fresnel pattern pavement, and better converge the emitted light into parallel beams. After convergence, the light spot effect will not be dark and blurred at the corners; the existing convex lens focusing solution is eliminated, which can further improve the penetration effect of the focused light beam. The lens body is made of PC material. Lenses made of PC material have high durability in daily use and are not easy to break. After being applied to professional mobile lighting tools, the impact resistance of the lamp products is improved, and the service life of the lamps is effectively extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the appearance structure of a lamp in an embodiment of the utility model;

[0020] Figure 2 It is a schematic cross-sectional structure diagram of a lamp according to an embodiment of the utility model;

[0021] Figure 3 It is another cross-sectional structural schematic diagram of a lamp according to an embodiment of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a lens body of a lamp in an embodiment of the utility model;

[0023] Figure 5 It is a schematic cross-sectional structure diagram of the sawtooth concentric rings on the upper Fresnel pattern road surface of the lens body of a lamp in an embodiment of the utility model;

[0024] Icons: lamp housing 1, light source 2, reflector 3, heat sink 4, PCB board 5, lens body 6, thermal conductive colloid 7, extension 8, upper cover 9, depression 10, Fresnel pattern pavement 11, serrated concentric rings 12. DETAILED DESCRIPTION

[0025] Combination Figures 1 to 5 As shown, this embodiment provides a lamp, including a lamp housing 1, and a light source 2, a reflector 3, and a heat sink 4 arranged in the lamp housing 1, and also includes a lens that can be used to switch between focusing and flooding, wherein the reflector 3 is arranged between the light source 2 and the lens, the heat sink 4 is connected to the light source 2 to dissipate the heat of the light source 2, the light source 2 includes a focusing light source 2 corresponding to the Fresnel pattern pavement 11 set on the lens body 6 and a floodlight light source 2 arranged on the side of the focusing light source 2, so as to achieve the switching between the focusing effect and the floodlight effect by switching the focusing light source 2 and the floodlight light source 2 on and off.

[0026] Combination Figure 4 As shown, the lens that can be used to switch between focusing and flooding includes a lens body 6, the lens body 6 includes a light incident surface, the light incident surface is provided with a Fresnel pattern road surface 11, the Fresnel pattern road surface 11 includes a plurality of raised serrated concentric rings 12 arranged sequentially and spaced outwardly from the center of the lens body 6 to form a focusing effect when light enters, each of the serrated concentric rings 12 is surrounded by uninterrupted convex serrations, and the tooth height of the serrated concentric rings 12 gradually decreases from the center of the lens body 6 to the outside; the light incident surface located on the outside of the Fresnel pattern road surface 11 is set as a plane to form a flooding effect when light enters. The uninterrupted here means that on the same serrated concentric ring 12, the convex serrations are continuous to form a complete serrated concentric ring 12.

[0027] In this embodiment, the entire lens body 6 is made of PC material, such as polycarbonate. The advantages of PC material include high strength, impact resistance, transparency, heat resistance, light weight and chemical corrosion resistance. This makes the lens made of PC material have high durability in daily use and is not easy to break. After being applied to professional mobile lighting tools, the impact resistance of the lamp product is improved and the service life of the lamp is effectively enhanced. Of course, in other embodiments, the lens body 6 can also be made of glass and other materials. The overall height thickness of the lens body 6 of this embodiment can be about 1.5mm, ±2-3mm.

[0028] The lens body 6 includes a light incident surface and a light emitting surface, and the light incident surface is opposite to the light source 2. A Fresnel pattern road surface 11 is provided at the center of the light incident surface, and the peripheral side of the Fresnel pattern road surface 11 is provided as a plane. In this embodiment, the sawtooth concentric ring 12 can be one of a circular ring, a square ring, a rectangular ring, a trapezoidal ring, and an elliptical ring. The Fresnel pattern road surface 11 is opposite to the center of the light source 2 to form a focusing effect, and the plane of the light incident surface is opposite to the floodlight source 2 to form a floodlight effect.

[0029] Combination Figure 5 As shown, combined Figure 4 In the embodiment shown, the Fresnel pattern pavement 11 is optimized to improve the focusing effect. Specifically, a plurality of sawtooth concentric rings 12 are arranged outward from the center of the lens body 6, and the tooth height of the sawtooth concentric rings 12 gradually decreases from the center to the outside. In a preferred embodiment, the tooth height h of the convex sawtooth of the sawtooth concentric ring 12 is between 0.40 mm and 0.66 mm, that is, the tooth height of the innermost ring of the sawtooth concentric ring 12 is 0.66 mm, and the tooth height of the outermost ring is 0.40 mm, and the number of the sawtooth concentric rings 12 can be set to 30-40, including but not limited to this.

[0030] In one embodiment, the angle from the tooth top of the inner ring to the angle of the outer ring gradually increases, and the angle a between the effective optical surface and the invalid optical surface of the sawtooth concentric ring 12 is between 28° and 40°, where the effective optical surface refers to the surface on the sawtooth concentric ring that participates in focusing (or has a high correlation with focusing), and the invalid optical surface is the surface on the sawtooth concentric ring that has nothing to do with the focusing effect (or has a very small correlation); this angle setting is beneficial to reducing the offset of the field of view angle of the lens and improving the optical effect of focusing.

[0031] In one embodiment, the angle b between the effective optical surface and the lens axis is 24°-35°, and the angle c between the ineffective optical surface and the lens axis is 4°-7°, which can reduce the difficulty of manufacturing the lens body 6 and improve the optical effect of focusing.

[0032] The distance between adjacent tooth peaks is 0.31 mm-0.35 mm, and the curvature radius of the grain surface of the same sawtooth concentric ring 12 is the same. Through the above arrangement, the focusing effect of the Fresnel grain road surface 11 is improved, and the dispersion of the light source 2 is reduced.

[0033] In this embodiment, the light emitting surface and the light incident surface are both frosted surfaces to improve the uniformity of the light spot. In other embodiments, the light incident surface and the light emitting surface may also be transparent surfaces to achieve different light effects.

[0034] In this embodiment, the lens body 6 is mounted on the lamp housing 1, or on the upper cover 9. The lens body 6 extends in all directions to form an extension portion 8, and the extension portion 8 is suitable for secondary injection molding and sealing with the upper cover 9 of the lamp to ensure the sealing effect. The present application sets the extension part based on the light incident surface, and the top surface of the extension portion 8 is flush with the light incident surface of the lens. In another embodiment, the lens body 6 can also be set to be detachable relative to the lamp, and the extension portion 8 is detachable from the lamp by means of buckles or screws, so as to facilitate replacement.

[0035] The lamp described in this embodiment is further provided with a power supply and a PCB board 5 in the lamp housing 1, and a partition is provided between the power supply and the PCB board 5 to reduce the temperature rise on the PCB board 5 caused by discharge, and the discharge temperature rise can be reduced by 5° to 10°. In this embodiment, the angle of the reflector 3 is between 30° and 60°, preferably about 45°, for converging light. A heat-conducting colloid 7 can be provided between the light source 2 and the heat sink 4 to fix the light source 2 and transfer the heat generated by the light source 2 to the heat sink 4.

[0036] In this embodiment, the light source 2 includes a spotlight source 2 corresponding to the Fresnel pattern pavement 11 and a floodlight source 2 arranged on the side of the spotlight source 2 to switch between the spotlight effect and the floodlight effect by switching the spotlight source 2 and the floodlight source 2 on and off. When switching between spotlighting and floodlighting, the spotlight is when the middle light source 2 emits light and the surrounding light sources 2 are off; while the floodlight is when the surrounding light sources 2 emit light and the middle light source 2 is off. The light source 2 here can be a COB light source 2 or an SMD patch light source 2. When switching, the light beam emitted by the light source 2 is adjusted accordingly. The distance between the lens body 6 and the light source 2 is 6mm-10mm, preferably 7.5mm.

[0037] In a preferred embodiment, the upper cover 9 of the lamp has a recessed portion 10. When the light-emitting surface of the lamp is turned upside down, the recessed portion 10 can diffuse the light to avoid damage caused by continuous light emission and heat generation of the lamp. In addition, the bracket of the lamp is rotatable, and the lamp has gears when rotating. For example, each gear is set to rotate 30°, and a damping shaft can also be used.

[0038] Through this embodiment, the switching effect of the lamp between the spotlighting and floodlighting effects is improved, and the safety and service life are higher.

[0039] It should be understood that the above are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0040] The above description of the drawings used in the implementation manner only shows certain embodiments of the utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

Claims

1. A lens that can be used to switch between focusing and flooding, comprising a lens body, wherein the lens body comprises a light incident surface, and wherein: The light incident surface is provided with a Fresnel pattern road surface, and the Fresnel pattern road surface includes a plurality of raised serrated concentric rings spaced from the center of the lens body in sequence outward to form a focusing effect when light enters, each of the serrated concentric rings is surrounded by uninterrupted convex serrations, and the tooth height of the serrated concentric rings gradually decreases from the center of the lens body outward; the light incident surface is located on the outer side of the Fresnel pattern road surface and is set as a plane to form a floodlight effect when light enters.

2. The lens that can be used to switch between focusing and flooding according to claim 1, characterized in that: The tooth height of the central sawtooth concentric ring is 0.66 mm, and the tooth height of the outermost sawtooth concentric ring is 0.40 mm, and they decrease from the inside to the outside.

3. The lens capable of switching between focusing and flooding according to claim 1, characterized in that: The lens body is extended in all directions to form an extension portion, and the extension portion is suitable for secondary injection molding and sealing with the upper cover of the lamp.

4. The lens capable of switching between focusing and flooding according to claim 1, characterized in that: The sawtooth concentric ring is one of a circular ring, a square ring, a rectangular ring, a trapezoidal ring, and an elliptical ring.

5. The lens capable of switching between focusing and flooding according to claim 1, characterized in that: The distance between the tooth peaks of adjacent sawtooth concentric rings is 0.31mm-0.35mm.

6. The lens capable of switching between focusing and flooding according to claim 1, characterized in that: Both the light exiting surface and the light entering surface are matte to improve the uniformity of the light spot.

7. The lens capable of switching between focusing and flooding according to claim 1, characterized in that: The angle between the effective optical surface and the ineffective optical surface of the sawtooth concentric ring is 28°-40°, and the angle gradually increases from the center to the outside.

8. The lens capable of switching between focusing and flooding according to claim 7, characterized in that: The angle between the effective optical surface and the axis of the lens body is 24°-35°, and the angle between the ineffective optical surface and the axis of the lens is 4°-7°.

9. A lamp, comprising a lamp housing, and a light source, a reflector, and a radiator arranged in the lamp housing, characterized in that: It also includes a lens that can be used to switch between focusing and flooding as described in any one of claims 1 to 8, wherein the reflector is arranged between the light source and the lens, the heat sink is connected to the light source to dissipate heat from the light source, and the light source includes a focusing light source corresponding to the Fresnel pattern road surface and a flooding light source arranged around the focusing light source to achieve switching between focusing effect and flooding effect by switching the focusing light source and the flooding light source on and off.

10. The lamp according to claim 9, characterized in that: A power supply and a PCB board are also arranged in the lamp housing, and a partition is arranged between the power supply and the PCB board to reduce the increased temperature on the PCB board.

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