Lamp

Abstract

The present application relates to a lamp. The lamp comprises: a base having a mounting cavity; a light source arranged in the mounting cavity; a first reflector cup detachably mounted to the mounting cavity and radially symmetrically surrounding the light source around the central axis of the lamp; a second reflector cup arranged on the side of the first reflector cup away from the light source and detachably mounted to the mounting cavity; and a lens arranged between the first reflector cup and the second reflector cup, wherein the lens is provided with one or more protruding light-transmitting parts. In the lamp provided by the present application, the multiple protruding light-transmitting parts are provided in the lens, such that light rays generated by the light source can be evenly distributed, thereby maximizing light-emitting efficiency when light is fully mixed.

Description

A type of lamp

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202422658942.0, filed on November 1, 2024, entitled "A Lighting Fixture", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of lighting technology, and more particularly to a lighting fixture. Background Technology

[0004] A reflector is a cup-shaped reflector used for long-distance focused lighting. It utilizes limited light energy to control the illumination distance and area of ​​the main light spot. As a crucial component in secondary optical design, the reflector directly impacts the light quality of LED downlights.

[0005] Currently, in some LED lighting fixtures with reflectors, the light source often adopts a mixed light source, that is, multiple LED beads with different emission wavelengths or emission colors are mixed in the LED lighting fixture. In LED downlights, if this multi-color mixed light source is used, there are generally problems such as uneven color distribution, low light mixing efficiency, and poor light mixing performance.

[0006] Therefore, it is indeed necessary to provide a luminaire with high light extraction efficiency and high light mixing performance.

[0007] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this invention, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that the present invention does not possess the features of these prior art. On the contrary, the present invention already possesses all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Summary of the Invention

[0008] In view of the shortcomings of the prior art, this application provides a lighting fixture that aims to solve at least one or more technical problems existing in the prior art.

[0009] To achieve the above objectives, this application provides a lighting fixture, comprising:

[0010] The base has a mounting cavity;

[0011] The light source is located in the mounting cavity;

[0012] The first reflector is installed into the mounting cavity and surrounds the light source radially symmetrically around the central axis of the luminaire;

[0013] The second reflector is installed into the mounting cavity and positioned on the side of the first reflector furthest from the light source; and

[0014] A lens is disposed between a first reflector and a second reflector, wherein the lens has one or more protruding light-transmitting portions.

[0015] Preferably, the light-transmitting portion surrounds the light source radially symmetrically about the central axis of the luminaire.

[0016] Preferably, the second reflector is integrally formed with the lens.

[0017] Preferably, the first reflector cup has:

[0018] The first entrance near the light source;

[0019] The first exit is furthest from the light source from the first entrance;

[0020] A first reflective surface extending longitudinally along the luminaire between the first entrance and the first exit.

[0021] The first reflective surface is composed of multiple independent reflective segments.

[0022] Preferably, the second reflector includes:

[0023] The second entrance is located near the light source;

[0024] The second exit is located away from the light source from the second inlet;

[0025] A second reflective surface extending longitudinally along the luminaire between the second inlet and the second outlet.

[0026] The second reflective surface is composed of multiple independent reflective segments.

[0027] Preferably, multiple reflective segments are stacked along the longitudinal direction of the luminaire or radially symmetrically distributed around the central axis of the luminaire.

[0028] Preferably, the luminaire provided in this application further includes a face ring, which is installed in the mounting cavity and arranged on the side of the second reflector away from the light source.

[0029] The beneficial technical effects of this application include:

[0030] This application provides a lighting fixture, particularly a downlight fixture with a reflector. The fixture includes two reflector cups stacked on top of each other and radially surrounding a light source. A lens is disposed between the two reflector cups, and the lens has one or more protruding light-transmitting parts inside. By providing multiple protruding light-transmitting parts, the light emitted from the light source can be evenly distributed after secondary reflection, thereby maximizing the light output efficiency while ensuring sufficient light mixing. Furthermore, since the reflector cups can be composed of multiple reflective segments, the reflective surfaces of the reflector cups can be treated substantially uniformly, resulting in nearly uniform optical reflection performance of the entire reflector cup. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 is an axonometric sectional view of the lamp provided in an embodiment of this application;

[0033] Figure 2 is a cross-sectional view of the lamp shown in Figure 1;

[0034] Figure 3 is a schematic diagram of the lens and the second reflector provided in an embodiment of this application;

[0035] Figure 4 is a cross-sectional view of the lens and the second reflector provided in an embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Base; 2. Light source; 3. First reflector cup; 31. First inlet; 32. First reflective surface; 33. First outlet; 4. Lens; 40. Light-transmitting part; 5. Second reflector cup; 51. Second inlet; 52. Second reflective surface; 53. Second inlet; 6. Face ring. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this embodiment clearer, the technical solutions of this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this embodiment, not all embodiments. Based on the embodiments in this embodiment, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more.

[0039] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] The reflector cup, reflector assembly, and lamp provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0041] As shown in Figures 1 and 2, this application discloses a lamp, particularly a downlight, which may include a base 1, a light source 2, a first reflector 3, a lens 4, and a second reflector 5.

[0042] Specifically, the base 1 provided in this embodiment is a heat dissipation base. The base 1 has a mounting cavity, and the light source 2 is arranged at the bottom of the mounting cavity of the base 1 (e.g., rigidly connected to the bottom of the base 1).

[0043] According to a preferred embodiment, the base 1 has a heat dissipation structure on the side opposite to the light source 2. This heat dissipation structure consists of a plurality of heat dissipation fins.

[0044] According to a preferred embodiment, the light source 2 may include one or more LED beads. When the light source 2 is designed as a multi-color mixed light source, the light source 2 may be composed of LED beads with different emission wavelengths / colors.

[0045] In this embodiment of the application, referring to Figures 1 and 2, the first reflector 3 is connected to the base 1 and positioned close to the light source 2. The first reflector 3 is detachably mounted to the bottom of the mounting cavity of the base 1 and surrounds the light source 2 from its periphery, so that the first reflector 3 can be used to receive and reflect light emitted from the light source 2.

[0046] Specifically, as shown in Figure 2, the first reflector cup 3 has a first inlet 31 close to the light source 2 and a first outlet 32 ​​away from the light source 2 relative to the first inlet 31. A first reflective surface 33 is formed between the first inlet 31 and the second outlet 32 ​​of the first reflector cup 3. The first reflective surface 33 extends along the longitudinal direction L of the downlight fixture and radially symmetrically surrounds the light source 2 around the central axis of the downlight fixture. Preferably, the first reflective surface 33 expands radially outward around the central axis of the downlight fixture in the direction from the first inlet 31 to the first outlet 32 ​​of the first reflector cup 3, thus the first reflector cup 3 generally has a cup structure with a gradually widening opening.

[0047] In this embodiment of the application, referring to Figures 1 and 2, the second reflector 5 is connected to the base 1 and positioned away from the light source 2. Specifically, along the longitudinal direction L of the downlight fixture, the second reflector 5 is positioned on the side of the first reflector 3 away from the light source 2 and is detachably mounted to the top of the mounting cavity of the base 1. The second reflector 5 is configured to receive and reflect light emitted from the light source 2.

[0048] Specifically, as shown in Figure 2, the second reflector cup 5 has a second inlet 51 close to the light source 2 and a second outlet 52 opposite to the second inlet 51 and away from the light source 2. A second reflective surface 53 is formed between the second inlet 51 and the second outlet 52 of the second reflector cup 5. The second reflective surface 53 extends along the longitudinal direction L of the downlight fixture and is arranged radially symmetrically around the central axis of the downlight fixture. Preferably, the second reflective surface 53 expands radially outward around the central axis of the downlight fixture in the direction from the second inlet 51 of the second reflector cup 5 to the second outlet 32, thus the second reflector cup 5 generally has a cup structure with a gradually widening opening.

[0049] According to a preferred embodiment, the reflectors (i.e., the first reflector 3 and the second reflector 5) provided in this application are made of glass. In other embodiments, the reflectors may also be made of plastic or other materials commonly used in lamp reflectors, and this application does not limit this to any particular material.

[0050] In this embodiment of the application, referring to Figures 1 and 2, a lens 3 is disposed between the first reflector 3 and the second reflector 5. The lens 3 is configured to allow light reflected by the first reflector 3 to pass through and be projected onto the second reflector 5, thereby causing the light to be reflected by the second reflector 5 to the external environment.

[0051] In this embodiment of the application, referring to Figures 2 to 4, the lens 3 is provided with one or more light-transmitting portions 40 protruding towards the second reflector 5. Referring to Figure 3, when the lens 3 is provided with multiple light-transmitting portions 40, the multiple light-transmitting portions 40 are distributed relative to each other, moving away from or closer to the central axis of the lens 3, and each light-transmitting portion 40 is radially symmetrically arranged around the central axis of the lens 3.

[0052] Preferably, taking the provision of three light-transmitting portions 40 as an example, each light-transmitting portion 40 protrudes from the bottom of the lens 3, approximately along the longitudinal direction L of the downlight fixture, toward the second outlet 52 of the second reflector 5. Thus, in the cross-sectional view shown in FIG. 2, each light-transmitting portion 40 at least partially protrudes relative to the bottom surface of the lens 3. Referring to FIG. 2, the protrusion height of the light-transmitting portion 40 located radially innermost of the lens 3 is less than the protrusion height of the other light-transmitting portions 40 located radially outermost relative to it. For ease of explanation, the multiple light-transmitting portions 40 disposed within the lens 3 are sequentially referred to from the center of the lens 3 outwards as the first light-transmitting portion, the second light-transmitting portion, the third light-transmitting portion, and so on.

[0053] It is understandable that, since the lens 3 has multiple (e.g., three) protruding light-transmitting portions 40 inside, when the light emitted by the light source 2 is projected onto the longitudinal reflective areas of the first reflective surface 33, taking Figure 2 as an example, the first light ray projected by the light source 2 onto the approximate bottom of the first reflective surface 33 is reflected and then enters the light-transmitting portion 40 located on the radially outer side of the lens 3 (e.g., the third light-transmitting portion), and is transmitted through this light-transmitting portion 40 to the vicinity of the outer edge of the second reflector 5; the second light ray projected by the light source 2 onto the middle of the first reflective surface 33 is reflected and then enters the light-transmitting portion 40 located on the relatively radially inner side of the lens 3 (e.g., the first light-transmitting portion), and is transmitted through this light-transmitting portion 40 to the approximate central area of ​​the second reflector 5. That is, through the curvature design of each light-transmitting portion 40 of the lens 3, the light generated by the light source 2 can be evenly distributed, thereby maximizing the light extraction efficiency while ensuring sufficient light mixing.

[0054] In other embodiments, a different number of light-transmitting portions 40 may be provided within the lens 3, depending on the application scenario and optical performance requirements of the luminaire. It is understood that the accompanying drawings are merely exemplary disclosures for ease of understanding and illustration and should not be construed as specific limitations on this application.

[0055] According to a preferred embodiment, the lens 3 and the second reflector 5 can be constructed as a single piece, thereby reducing manufacturing costs.

[0056] In this embodiment of the application, taking the first reflector 3 as an example, its curvature change can be solved or characterized by the following expression: y = 0.0037x 3 -0.2115x 2+5.1735x-24.547. Taking Figure 2 as an example, a coordinate system is established with the center of the first inlet 31 of the first reflector cup 3 as the origin O. x is the abscissa of any point on the first reflective surface 33 from the origin O, and y is the ordinate of any point on the first reflective surface 33 from the origin O. Further, by taking the first derivative of the above equation and substituting the abscissa x of a point on the first reflective surface 33 into the first derivative, the curvature can be obtained. Therefore, the above equation represents the overall curvature change of the first reflective surface 33.

[0057] It is understood that the description of the curvature change of the first reflective surface 33 of the first reflector cup 3 in this application is merely a non-limiting illustration and should not be considered as a specific limitation of this application. In other embodiments, other calculations or expressions may be used to characterize the curvature change of each segment of the reflector, which can be designed by the designer according to the optical performance requirements of the reflector cup.

[0058] As a further improvement of this application, the first reflector 3 and / or the second reflector 5 can be composed of multiple independent reflective segments that can be separably combined. For example, multiple reflective segments are stacked and distributed along the longitudinal direction L of the downlight fixture. In other words, along the longitudinal direction L of the downlight fixture, the reflective surface of the first reflector 3 and / or the second reflector 5 is composed of multiple independent annular reflectors cut out with different cross-sections. Alternatively, multiple reflective segments are radially symmetrically distributed around the central axis of the downlight fixture. In other words, the reflective surface of the first reflector 3 and / or the second reflector 5 is divided into multiple independent reflective segments that are generally arc-shaped or fan-shaped about the central axis of the downlight fixture.

[0059] Understandably, for a one-piece reflector, the coating or deposition efficiency differs significantly between the upper and lower openings when performing optical coating on a cup-shaped structure with a long opening, resulting in inconsistent deposition states on the reflective surface of the cup. Therefore, when the first reflector 3 and / or the second reflector 5 are composed of multiple reflective segments, each reflective segment acts as an independent reflective unit, making surface optical treatments (such as evaporation coating or sputtering) easier to perform. Furthermore, for example, when the first reflector 3 and / or the second reflector 5 are composed of multiple reflective segments radially symmetrically distributed around the central axis of the downlight, each reflective segment is essentially uniform and closer to a planar surface. Thus, the reflective surface of each reflective segment is treated essentially uniformly, resulting in nearly uniform optical reflectivity across the entire reflective surface of the first reflector 3 and / or the second reflector 5.

[0060] Optionally, when the first reflector 3 and / or the second reflector 5 are composed of multiple independent reflective segments, the multiple reflective segments can be combined with each other by fasteners to form a reflective surface. In some embodiments, the fastener can be an annular clamp (such as a flange ring). For example, the annular clamp is inserted from the circumferential outside of two reflective segments, thereby allowing two or more reflective segments to be combined along the longitudinal direction L of the downlight fixture. In other optional embodiments, the fastener can be a slot and block structure, i.e., slots and blocks that can be shaped and connected are respectively provided on the splicing surfaces of two repositionable reflective segments. Alternatively, two or more reflective segments can be bonded together. This application does not limit this.

[0061] Referring to Figures 1 and 2, the luminaire provided in this embodiment may further include a face ring 6. The face ring 6 is inserted into the second outlet 52 of the second reflector 5 and detachably connected to the base 1. As an example, the face ring 6 and the base 1 may be rotatably connected by a threaded structure, for example.

[0062] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0063] Finally, it should be noted that this application specification and its accompanying drawings are illustrative and not intended to limit the scope of the claims. Although the embodiments have been described in detail with reference to the foregoing examples, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments described herein. This application specification contains multiple inventive concepts, such as "preferredly," "according to a preferred embodiment," or "optionally," each indicating that the corresponding paragraph discloses an independent concept. The applicant reserves the right to file divisional applications based on each inventive concept.

Claims

1. A lamp, wherein, include: Base (1), having a mounting cavity; Light source (2) is disposed in the mounting cavity; The first reflector (3) is installed into the mounting cavity and radially symmetrically surrounds the light source (2) around the central axis of the lamp; The second reflector (5) is installed into the mounting cavity and is positioned on the side of the first reflector (3) away from the light source (2); as well as A lens (4) is disposed between the first reflector (3) and the second reflector (5), wherein the lens (4) is constructed with one or more protruding light-transmitting portions (40).

2. The lighting fixture according to claim 1, wherein, The light-transmitting portion (40) radially symmetrically surrounds the light source (2) about the central axis of the lamp.

3. The lighting fixture according to claim 1, wherein, The second reflector (5) is integrally formed with the lens (4).

4. The luminaire according to any one of claims 1 to 3, wherein, The first reflector (3) has: The first entrance (31) near the light source (2); The first exit (32) is farther away from the light source (2) from the first inlet (31); A first reflective surface (33) extending along the longitudinal direction (L) of the luminaire between the first inlet (31) and the first outlet (32), The first reflective surface (43) is composed of multiple independent reflective segments.

5. The lighting fixture according to claim 4, wherein, Multiple reflective segments are stacked along the longitudinal direction (L) of the luminaire or radially symmetrically distributed around the central axis of the luminaire.

6. The luminaire according to any one of claims 1 to 3, wherein, The second reflector (5) includes: The second inlet (51) is located near the light source (2); A second outlet (52) that is farther away from the light source (2) from the second inlet (51); A second reflective surface (53) extending along the longitudinal direction (L) of the luminaire between the second inlet (51) and the second outlet (52), The second reflective surface (53) is composed of multiple independent reflective segments.

7. The luminaire according to claim 6, wherein, Multiple reflective segments are stacked along the longitudinal direction (L) of the luminaire or radially symmetrically distributed around the central axis of the luminaire.

8. The lighting fixture according to claim 1, wherein, It also includes a face ring (6), which is installed in the mounting cavity and arranged on the side of the second reflector (5) away from the light source (2).

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