Reflector and lamp thereof

Abstract

The utility model relates to a reflector and a lamp thereof, the reflector is mounted on a cylindrical lamp and is used for reflecting light emitted by a light source of the cylindrical lamp along a preset direction, and the reflector is provided with an inlet close to the light source, an outlet close to the light source and a reflector, an outlet away from the light source relative to the inlet; the reflecting surfaces extend along the longitudinal direction of the cylindrical spotlight between the inlet and the outlet; the reflecting surfaces radially and symmetrically surround the light source around the central axis of the cylindrical spotlight; wherein the reflective surface is composed of a plurality of independent partial reflectors. According to the utility model, the reflector which can be combined in a split manner is arranged, so that the light reflecting surface of the reflector, which is subjected to surface treatment, has basically equal light reflecting performance, and the defect of non-uniform light of the existing cylindrical spotlight can be obviously improved; and secondly, due to the different curvatures of the different section reflectors, the light source light rays from different emergent angles can be basically and consistently reflected to expected light emitting point positions by the corresponding section reflectors, so that the light emitting efficiency and the light mixing performance of the cylindrical spotlight are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lamp technical field especially relates to a reflector and lamp thereof. BACKGROUND

[0002] The light cup is a reflector for long-distance spotlighting, and its appearance is cup-shaped. The light cup can control the light distance and light area of the main light spot by using limited light energy. As one of the important components of secondary optical design, the light cup can directly affect the light quality of the LED tube spotlight.

[0003] In the general light cup and its surface forming process, the light cup is usually integrally injection molded and surface treated, but the overall light cup has a cup body structure with a gradually changing opening, has a long longitudinal depth between the bottom opening and the top opening, and the surface treatment areas of the bottom opening and the top opening are also different. Therefore, when injection molding and surface treatment by evaporation plating, sputtering and other plating processes are performed, the plating or deposition efficiency is significantly different, resulting in different deposition states of the cup body light reflecting surface (such as uneven thickness of the optical film), which makes the overall reflectivity of the light cup uneven, greatly affecting the light efficiency of the LED tube spotlight. Therefore, it is necessary to provide a reflector and lamp thereof.

[0004] In addition, on the one hand, there are differences in understanding between those skilled in the art; on the other hand, the applicant has studied a large number of literatures and patents when making the invention, but due to the limited space, all the details and contents are not listed in detail, which does not mean that the invention does not have these characteristics of the prior art. On the contrary, the invention already has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art in the background art. CONTENT OF THE UTILITY MODEL

[0005] In view of the deficiencies of the prior art, the utility model provides a reflector and lamp thereof, aiming at solving at least one or more technical problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides a reflector, which is installed in a tube lamp, and the tube lamp comprises a light source. The reflector is used to reflect the light emitted by the light source in a predetermined direction. The reflector has:

[0007] An inlet close to the light source;

[0008] An outlet away from the light source relative to the inlet; and

[0009] A light reflecting surface extending along the longitudinal direction of the tube lamp between the inlet and the outlet, which radially and symmetrically surrounds the light source around the central axis of the tube lamp.

[0010] The light-reflecting surface is composed of a plurality of independent segment reflectors.

[0011] Preferably, the plurality of segment reflectors comprises a plurality of first segment reflectors which are stacked along the longitudinal direction of the downlight.

[0012] Preferably, the at least two first segment reflectors have different curvatures from each other.

[0013] Preferably, the plurality of segment reflectors comprises a plurality of second segment reflectors which are distributed radially around the central axis of the downlight.

[0014] Preferably, the plurality of segment reflectors are separably combined to form the light-reflecting surface by means of the fixing member.

[0015] Preferably, the reflector is made of glass.

[0016] Preferably, the utility model also relates to a downlight with a reflector, which comprises:

[0017] a base which is provided with a light source;

[0018] a lens which is connected to the base and partially or wholly covers the light source; and

[0019] The reflector provided by the utility model is connected to the base and is used for reflecting light emitted by the light source and transmitted via the lens in a predetermined direction.

[0020] Preferably, the utility model also relates to another downlight with a reflector, which comprises:

[0021] a base which is provided with a light source;

[0022] two reflectors provided by the utility model, the two reflectors are arranged in a stacked manner to reflect light emitted by the light source in a predetermined direction;

[0023] a lens which is arranged between the two reflectors to allow light reflected by one of the reflectors to be projected to the other reflector via the lens.

[0024] The utility model provides a lamp with light emitting device and reflector, reflector is used for along the predetermined direction with light emitting device emitted light reflection, wherein, reflector has: the entrance close to light emitting device, the exit opposite the entrance away from light emitting device and the light reflecting surface along the longitudinal extension of the cylinder shooting lamp in the entrance and the exit, the light reflecting surface surrounds light emitting device radially symmetrically around the cylinder shooting lamp's central axis, and the light reflecting surface is combined by a plurality of independent section reflector, so that when the light reflecting surface of reflector carries out surface coating treatment, can make the surface of each section reflector have the light reflecting performance of basic equality, thereby when the reflector is applied to LED cylinder shooting lamp, can improve the defect that cylinder shooting lamp is not one of the existing uniform light, and the combination of a plurality of section reflector provides a variety of reflector to allow the designer to flexibly select the reflector with different reflecting performance according to the optical performance demand of lamp, in addition, because the section reflector between different has different curvature, makes the light source light of different exit angle can be reflected to the desired light emitting point by the corresponding section reflector basically, thereby making LED cylinder shooting lamp have excellent light emitting efficiency and light mixing performance. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the application or prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0026] Figure 1 It is the sectional view of one of the lamps provided by the utility model embodiment;

[0027] Figure 2 It is the structural schematic view of the reflector provided by the utility model embodiment;

[0028] Figure 3 It is the structural schematic view of the fixing piece provided by the utility model embodiment;

[0029] Figure 4 It is the sectional view of the second lamp provided by the utility model embodiment;

[0030] Figure 5 It is the light path diagram of the light source provided by the utility model embodiment.

[0031] Mark explanation:

[0032] 1, base; 2, light source; 3, lens; 4, reflector; 4a, first stage reflector; 4b, second stage reflector; 41, inlet; 42, outlet; 43, light-reflecting surface; 430a, first section reflector; 430b, second section reflector; 5, fixing member; 6, face ring. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the embodiments clearer, the following will clearly and completely describe the technical solutions in the embodiments with reference to the drawings in the embodiments. Obviously, the described embodiments are some but not all of the embodiments. Based on the embodiments in the embodiments, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0034] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class and do not limit the number of objects, for example, the first object can be one or more.

[0035] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The reflector and the lamp thereof provided by the embodiments of the present application will be described in detail below in combination with the drawings and specific embodiments and application scenarios.

[0037] As shown in Figures 1 to 3 , the lamp with a light-emitting device and a reflector disclosed by the embodiments of the present application can include a base 1, a light source 2, a lens 3 and a reflector 4.

[0038] Specifically, referring to Figure 1 , the base 1 is provided with the light source 2 on the bottom surface. The lens 3 is connected to the base 1 and partially or entirely covers the light source 2, so as to allow the light emitted by the light source 2 to be projected to the reflector 4 through the lens 3.

[0039] As shown in Figure 4 and Figure 5As shown, the embodiments of the present application also disclose another lamp with a light emitting device and a reflector, which can include a base 1, a light source 2, a lens 3 and two reflectors 4.

[0040] Specifically, referring to Figure 4 One of the reflectors 4 is arranged close to the light source 2 and can serve as a primary reflector 4a. The other reflector 4 is arranged away from the light source 2 at the exit position of the primary reflector 4a and can serve as a secondary reflector 4b. The lens 3 is arranged between the two reflectors 4 (i.e. the primary reflector 4a and the secondary reflector 4b) and allows the light reflected by one of the reflectors 4 (e.g. the primary reflector 4a) to be projected to the other reflector 4 (e.g. the secondary reflector 4b) via the lens 3.

[0041] The reflector 4 provided by the embodiments of the present application is particularly suitable for a downlight lamp, wherein the downlight lamp can contain the light source 2 so that the reflector 4 can reflect the light emitted by the light source 2 in a predetermined direction.

[0042] According to a preferred embodiment, the light source 2 can contain one or more LED lamp beads. Preferably, when the light source 2 is designed as a multi-color mixed light source, the light source 2 can be composed of LED lamp beads of different light emitting wavelengths / colors.

[0043] In the embodiments of the present application, the base 1 is a heat dissipation base. Further, the side of the base 1 away from the light source 2 is configured with a heat dissipation structure. The heat dissipation structure is composed of a plurality of heat dissipation fins.

[0044] According to a preferred embodiment, the reflector 4 provided by the embodiments of the present application is made of glass. In other embodiments, the reflector 4 can also be made of plastic or other materials commonly used for lamp reflector cups, which are not limited in the present application.

[0045] In the embodiments of the present application, the reflector 4 is used to reflect the light emitted by the light source 2 in a predetermined direction. Referring to Figure 1 , the reflector 4 has an inlet 41 close to the light source 2 and an outlet 42 away from the light source 2 opposite to the inlet 41. A reflecting surface 43 is formed between the inlet 41 and the outlet 42 of the reflector 4. The reflecting surface 43 extends along the longitudinal direction L of the downlight lamp and radially surrounds the light source 2 around the central axis of the downlight lamp. Preferably, the reflecting surface 43 expands radially outward around the central axis of the downlight lamp in the direction from the inlet 41 to the outlet 42 of the reflector 4, and thus the reflector 4 is generally in the form of a cup body with a gradually expanding opening.

[0046] According to a preferred embodiment, the reflecting surface 43 can be configured to be combined by a plurality of independent segment reflectors. In the embodiments of the present application, the reflecting surface 43 may, for example, include at least two independent segment reflectors. In other embodiments, the reflecting surface 43 can be combined by other numbers of segment reflectors, which generally depends on the application scenario of the lamp and the optical performance requirement thereof. It can be understood that the drawings shown in the present application are only exemplary disclosures made for the convenience of understanding and illustration, and should not be regarded as specific limitations of the present application.

[0047] In the embodiments of the present application, the plurality of segment reflectors can include a plurality of first segment reflectors 430a or a plurality of second segment reflectors 430b. For example Figure 2 , the plurality of segment reflectors can include two first segment reflectors 430a or two second segment reflectors 430b.

[0048] According to a preferred embodiment, when the reflecting surface 43 of the reflector 4 is combined by a plurality (such as two) of first segment reflectors 430a, the plurality of first segment reflectors 430a are configured to be distributed in layers along the longitudinal direction L of the down lamp. Referring to Figure 2 , along the longitudinal direction L of the down lamp, the reflecting surface 43 is composed of a plurality of independent annular reflecting cups taken at different cross sections. Among them, the diameters or circumferences of the plurality of annular reflecting cups increase or decrease in turn along the longitudinal direction L of the down lamp. It can be understood that the more the number of the first segment reflectors 430a is, the smaller the height or longitudinal depth of each first segment reflector 430a is relatively, and thus when the surface optical processing (such as evaporation plating, sputtering) is performed on each first segment reflector 430a, the reflecting surface of each first segment reflector 430a can be processed substantially uniformly, and thus the optical reflection performance between the first segment reflectors 430a is nearly consistent.

[0049] According to a preferred embodiment, when the reflecting surface 43 of the reflector 4 is combined by a plurality (such as two) of second segment reflectors 430b, the plurality of second segment reflectors 430b are configured to be distributed radially around the central axis of the down lamp. Referring to Figure 2 , the reflecting surface 43 is divided into a plurality of independent reflecting segments in the form of substantially arc surface or fan surface about the central axis of the down lamp. It can be understood that the more the number of the second segment reflectors 430b is, the closer to the plane each second segment reflector 430b is, and thus when the surface optical processing (such as evaporation plating, sputtering) is performed on each second segment reflector 430b, the reflecting surface of each second segment reflector 430b can be processed substantially uniformly, and thus the optical reflection performance between the second segment reflectors 430b is nearly consistent.

[0050] Referring to Figures 1 to 3In the embodiments of the present application, the plurality of segment reflectors can be combined with each other separably by the fixing member 5 to form the light-reflecting surface 43. As shown in Figure 3 The fixing member 5 provided in the embodiments of the present application is configured as a ring-shaped clamping structure (e.g. a flange ring). Taking the combination of the plurality of first segment reflectors 430a as an example, at least two first segment reflectors 430a are combined along the longitudinal direction L of the downlight, the ring-shaped clamping fixing member 5 is sleeved to the circumferential side of the reflector 4 from the inlet 41 to the outlet 42 of the reflector 4, and is fixed at the connecting position of the two first segment reflectors 430a. Further, the outer circumferential side of the first segment reflector 430a can be configured with a ring-shaped protrusion, and the inner wall of the fixing member 5 is configured with a ring-shaped groove matched with the ring-shaped protrusion, so as to limit the ring-shaped protrusion in the ring-shaped groove, thereby connecting and fixing the two first segment reflectors 430a by means of the ring-shaped protrusion and the ring-shaped groove.

[0051] In addition, as shown in Figure 4 and Figure 5 , in the downlight with two-stage reflectors, at least one reflector 4 can be combined by a plurality of segment reflectors. That is to say Figure 4 at least one of the first-stage reflector 4a and the second-stage reflector 4b is combined by at least two segment reflectors. The present application does not limit this.

[0052] As a further improvement of the present application, the at least two first segment reflectors 430a can have different curvatures from each other. As shown in Figure 2 , the light-reflecting surface 43 is formed by the combination of the two first segment reflectors 430a stacked in upper and lower layers.

[0053] In the embodiments of the present application, along the longitudinal direction L of the downlight, the curvature variation of the lower first segment reflector 430a can be solved or characterized by the following expression: y = -0.0003x 3 + 0.0847x 2 - 0.0079x - 2.941. Wherein, taking Figure 1 for example, a coordinate system is established with the center of the inlet 41 of the reflector 4 as the origin O, x is the horizontal coordinate of any point on the first segment reflector 430a to the origin O, and y is the vertical coordinate of any point on the first segment reflector 430a to the origin O. Further, by taking the first derivative of the above expression and bringing the horizontal coordinate x of a certain point on the first segment reflector 430a into the first derivative expression, the curvature can be obtained. Thus, the above expression characterizes the curvature variation of the whole first segment reflector 430a.

[0054] On the other hand, as shown in Figure 2 , the curvature variation of the other first segment reflector 430a located above can be solved or characterized by the following expression: y = -0.0002x 3+0.079x 2 +0.1141x-3.81. Understandably, for each first segment reflector 430a, the coefficients in each polynomial expression are usually different depending on the number, position, and size of the divided first segment reflectors 430a.

[0055] In some alternative embodiments, at least two second-segment reflectors 430b may have different curvatures than each other. For example... Figure 2 As shown, the reflective surface 43 is formed by combining two symmetrical second-section reflectors 430b. In this embodiment, taking the second-section reflector 430b located on the left as an example, its curvature change in the direction from the inlet 41 of the reflector 4 to the outlet 42 of the reflector 4 can be solved or characterized by the following expression: y = -0.0002x 3 +0.0805x 2 +0.0624x-3.2794. Furthermore, the second segment reflector 430b located on the right side can have a different curvature. For example, in the direction from the inlet 41 of the reflector 4 to the outlet 42 of the reflector 4, the second segment reflector 430b on the right side has a substantially uniform curvature. Therefore, the reflector 4 composed of these two second segment reflectors 430b can be applied to, for example, downlights with polarized designs.

[0056] It is understood that the description of the curvature changes of the segment reflectors in this application is merely an illustrative example 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 changes of each segment reflector, which can be designed by the designer according to the optical performance requirements of the reflector 4.

[0057] See Figure 1 , Figure 4 and Figure 5 The luminaire provided in this application embodiment may also include a face ring 6. The face ring 6 is inserted from the outlet 42 of the reflector 4 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.

[0058] 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.

[0059] It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. The word "comprising" does not exclude the presence of elements or steps other than those listed in a claim. In a claim, the word "a" or "an" preceding the commencement of the recitation of a list of elements or steps does not exclude the presence of more than one of such element or step. In the claims, the term "at least one" preceding the commencement of the recitation of a list of elements or steps does not exclude the presence of more than one of such element or step. The mere fact that measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. The application is based on Chinese patent application No. 201110271339.X, filed on September 30, 2011, the contents of which are hereby incorporated by reference in its entirety.

Claims

1. A reflector mounted to a downlight fixture, said downlight fixture comprising a light source (2), said reflector (4) for reflecting light emitted by said light source (2) in a predetermined direction, characterized in that, The reflector (4) has: an entrance (41) close to the light source (2); an exit (42) away from the light source (2) opposite the entrance (41); and a reflecting surface (43) extending along the longitudinal direction (L) of the downlight between the entrance (41) and the exit (42), the reflecting surface (43) radially surrounding the light source (2) around the central axis of the downlight; wherein the reflecting surface (43) is composed of a plurality of independent segment reflectors.

2. The reflector of claim 1, wherein The plurality of segment reflectors includes a plurality of first segment reflectors (430a) distributed in layers along the longitudinal direction (L) of the downlight.

3. The reflector of claim 2, wherein, At least two of the first segment reflectors (430a) have different curvatures from each other.

4. The reflector of claim 1, wherein The plurality of segment reflectors includes a plurality of second segment reflectors (430b) radially distributed around the central axis of the downlight.

5. The reflector of claim 1, wherein, The plurality of segment reflectors are separably combined by a fixing member (5) to form the reflecting surface (43).

6. The reflector according to any one of claims 1 to 5, characterized in that The reflector is made of glass.

7. A luminaire characterized by, It comprises: a base (1) provided with a light source (2); a lens (3) connected to the base (1) and covering the light source (2); and a reflector (4) as claimed in any one of claims 1 to 6 connected to the base (1) for reflecting light emitted by the light source (2) and transmitted via the lens (3) in a predetermined direction. It comprises:

8. A luminaire characterized by, a base (1) provided with a light source (2); two reflectors (4) as claimed in any one of claims 1 to 6, the two reflectors (4) being arranged in a stack with each other for reflecting light emitted by the light source (2) in a predetermined direction; a lens (3) arranged between the two reflectors (4) to allow the light reflected by one of the reflectors (4) to be projected via the lens (3) to the other of the reflectors (4). ​

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