Abstract:
The present disclosure relates to the field of lamps and lighting, in particular to an embedded LED lamp. In one example, an embedded LED lamp includes a power supply device, a lampshade; an LED light module, a reflector, and a lens. The power supply device includes a cup-shaped housing and a power supply unit provided within the housing. An opening end of the housing is detachably connected to an outer side of a bottom surface of the lampshade. The reflector is positioned within the lampshade. The reflector is detachably connected to an inner side of the bottom surface of the lampshade. A large opening at a front end of the reflector is detachably connected to the lens. The LED light module is attached at the inner side of the bottom of the lampshade in an area surrounded by an opening at a rear end of the reflector. The practice of the present disclosure may reduce the effects of heat on a power supply device, and an embedded LED lamp may have less light loss, good heat dissipation, and provide softer light. The disclosed embedded LED lamp is simple, with low manufacturing cost and convenient assembly.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to and incorporates herein Chinese Application No. 201520593402.7 filed on Aug. 7, 2015. 
     TECHNICAL FIELD 
     The present disclosure relates to the field of lamps and lighting, in particular to an embedded LED lamp. 
     BACKGROUND 
     LEDs have the advantages of saving energy, being environmentally friendly, having a long life, and having a small size. As such, they have been referred to as the fourth generation light source or green light. They are widely used in various fields relating to guideboards, displaying, decoration, backlights, general lighting, and urban landscaping. 
     Currently, LEDs are combined with reflectors according to needs of a particular application. The combination of a reflector and a lens makes light from a LED lamp richer, softer, and more uniformly emitted, so as to protect eyes. Moreover, it is desirable to uniformly scatter light emitted from LEDs through a lens while avoiding energy dissipation within the reflector, such that (1) users cannot see light beads and (2) that a maximum amount of light can be provided. In addition, LED lamps are in great demand and need to be adapted to a variety of applications. It is therefore particularly important to be able to conveniently assemble LED lamps. 
     Notwithstanding the above, LED lamps made with existing technology are complicated, with high manufacturing cost and inconvenient assembling. Accordingly, it is desirable to provide a new LED lamp. 
     SUMMARY 
     In view of the above, an object of the present disclosure is to provide an embedded LED lamp to address the problems of complicated structure, high manufacturing cost, and inconvenient assembly of LED lamps made with existing technology. 
     In one example, an embedded LED lamp includes a power supply device, a lampshade, an LED light module, a reflector, and a lens. The power supply device includes a cup-shaped housing and a power supply unit provided within the housing. An opening end of the housing is detachably connected to an outer side of a bottom surface of the lampshade. The reflector is positioned within the lampshade. The reflector is detachably connected to an inner side of the bottom surface of the lampshade. A large opening at a front end of the reflector is detachably connected to the lens. The LED light module is attached at the inner side of the bottom of the lampshade in an area surrounded by an opening at a rear end of the reflector. 
     In another example, the embedded LED lamp further includes a lamp ring, which is matched and assembled with an opening of the lampshade. 
     In yet another example, the embedded LED lamp further includes a spring securing element and a metal torsion spring. The spring securing element has a fixing portion, a connecting portion, and a snap-fit portion. The fixing portion, the connecting portion, and the snap-fit portion are integrally formed. The fixing portion is detachably connected to the outer side of the bottom surface of the lampshade. The connection portion extends from the fixing portion and is connected to or fitted with a side wall of the lampshade. The snap-fit portion extends from the connection portion and includes snap-fit collar. The metal torsion spring is provided in the snap-fit collar. 
     In yet another example, the fixing portion is provided with a hook portion. A curvature of the connecting portion is substantially the same as that of an outer side of the side wall the lampshade. The snap-fit portion comprises a first snap-fit portion and a second snap-fit portion extending from the first snap-fit portion. A cross-section of the snap-fit portion is S-shaped; and a cross-sectional radius of the first snap-fit portion is not equal to that of the second snap-fit portion. 
     In yet another example, the metal torsion spring is formed by two small coils and a large coil. Each of the two small coils and the large coil are coiled separately. The large coil is located between the two small coils. A first torsion arm and a second straight torsion arm extend from the two small coils, respectively, toward a same side. 
     In yet another example, the lampshade is made of a conductive material and the side wall of the lampshade is threaded. 
     In yet another example, the outer side of the bottom surface of the lampshade is provided with a positioning groove. The housing and the spring securing element are respectively engaged with opposite sides of the positioning groove. 
     In yet another example, an outer side of the side wall of the reflector is provided with a plurality of evenly spaced cylinders. A plurality of projections are provided on bottom surface of the lampshade at positions that correspond to those of the cylinders. The cylinders and projections have threaded holes and are configured to be respectively attached with screws. 
     In yet another example, the power supply device further comprises a push-in terminal and the push-in terminal is connected to the power supply unit. 
     In yet another example, the cross-section of lamp ring is arc-shaped. 
     Compared with the prior art, an embedded LED lamp of the present disclosure, a power supply unit, and a LED light module are separated from each other, increasing the space for heat dissipation and the paths for heat dissipation. In this way, the effect of heat on the power supply device may be reduced. The embedded LED lamp will have less light loss, good heat dissipation, and provide softer light. Further, the disclosed embedded LED lamp is simple, with low manufacturing costs and convenient assembly. 
     It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the embodiments of the present disclosure and together with the description, serve to explain the principles of the invention. 
         FIG. 1  is a cross-sectional view of an embodiment of the embedded LED lamp of the present disclosure. 
         FIG. 2  is a view of a lampshade of an embodiment of the embedded LED lamp of the present disclosure. 
         FIG. 3  is a view of a reflector of an embodiment of the embedded LED lamp of the present disclosure. 
         FIG. 4  is a cross-sectional view of a spring securing element of an embodiment of the embedded LED lamp of the present disclosure. 
         FIG. 5  is a view of a metal torsion spring of an embodiment of the embedded LED lamp of the present disclosure. 
         FIG. 6  is a view of a lamp ring of an embodiment of the embedded LED lamp of the present disclosure 
         FIG. 7  is a view of an embodiment of the embedded LED lamp of the present disclosure and a light tube before assembling. 
         FIG. 8  is a view of the connection of a metal torsion spring and a light tube in accordance with an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     References will now be made in detail to the present exemplary embodiments, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. While the description includes exemplary embodiments, other embodiments are possible, and changes may be made to the embodiments described without departing from the spirit and scope of the invention. The following detailed description does not limit the invention. Instead, the scope of the invention is defined by the appended claims and their equivalents. 
       FIG. 1  depicts an embedded LED lamp according to the present disclosure. The embedded LED lamp  1  may include a power supply device  10 , a lampshade  20 , a LED light module  30 , a reflector  40 , and a lens  50 . The power supply device  10  comprises a cup-shaped housing  11  and a power supply unit  12  provided within the housing  11 . The opening end of the housing  11  is detachably connected to the outer side of the bottom of the lampshade  20 . The reflector  40  is located within the lampshade  20 , and the small opening  41  end of the reflector  40  within the lampshade  20  is detachably connected to the inner side of the bottom of the lampshade  20 . The large opening  43  end of the reflector  40  is detachably connected to the lens  50 . The LED light module  30  is fixed at the inner side of the bottom of the lampshade  20  in an area that is surrounded by the opening end of the housing  11 . 
     In some embodiments, the reflector  40  has a bottom surface at its rear end. In such embodiments the LED light module  30  may be fixed at the inner side of the bottom surface of the rear end of reflector  40 . 
     The opening end of the housing  11  may be affixed to the outer side of the bottom surface of the lampshade  20  via screws, and constitutes an enclosed space along with the bottom surface of the lampshade  20 . The power supply unit  12  is provided on the inner wall of a side of the housing  11  that is away from the lampshade  20 , ensuring a stable power supply so that the embedded LED lamp can work smoothly. The LED light module  30  is provided on the inside of the bottom surface of the lampshade  20 , which is away from the power supply device  10 . In this way, the power supply unit  12  and the LED light module  30  are spaced away from one another. Thus, the power supply unit  12  is unlikely to be adversely affected by the heat from the LED light module  30 , thereby extending the life of the power supply unit. The reflector  40  is substantially trumpet-shaped with a small opening  41  end and large opening  43  end. The small opening  41  end of reflector  40  surrounds the area where the LED light module  30  is located and is fixed to the inner side of the bottom of the lampshade  20 , such that the light emitted from LED light module  30  can only travel out through the large opening  43  end of the reflector  40 . The lens  50  is snap-fitted in the large opening  43  end of the reflector  40 . In this embodiment, the reflector  40  can make light become soft, and the soft light travels through the lens  50  so that the light can be uniformly dispersed. The whole reflector  40  may be located inside the lampshade  20 . Light passes through the lens  50  and may be further uniformly and softly dispersed by the lampshade  20 . 
     In the embedded LED lamp of the present disclosure, the power supply unit  12  and the LED light module are respectively enclosed in separate spaces by housing  11  and lampshade  20 . Part of the role of a bulb of a conventional lamp is accomplished by a combination of the trumpet-shaped reflector  40  and the lens  50  provided at the large opening end of the reflector  40 . The emitted light is softened and evenly dispersed though this configuration. The LED lamp has a larger space for heat dissipation and less light loss than a conventional lamp. Its structure is simple, with low manufacturing cost and convenient assembly. 
       FIG. 2  depicts lampshade  20  of an embodiment of the embedded LED lamp according to the present disclosure.  FIG. 3  depicts reflector  40  of an embodiment of the embedded LED lamp according to the present disclosure.  FIG. 4  depicts spring securing element  60  of an embodiment of the embedded LED lamp according to the present disclosure.  FIG. 5  depicts metal torsion spring  70  of an embodiment of the embedded LED lamp according to the present disclosure.  FIG. 6  depicts lamp ring  80  of an embodiment of the embedded LED lamp according to the present disclosure. 
     In a preferred embodiment, as shown in  FIG. 2 , the lampshade  20  is substantially bowl-shaped. The bottom surface of the lampshade  20  is substantially flat, and is provided with three projections  21  and two positioning grooves  22 . The three projections  21  are located on the outside of the bowl shape and are co-circular to each other such that the arc between any two projections  21  measures 120°. The positioning grooves  22  may be provided near the periphery of the bottom of the lampshade  20 , external to the projections  21  with respect to the center of the bottom of the lamp shade  20 . One of the positioning grooves  22  may be next to one of the projections  21 . The positioning grooves may be positioned such that the features of the bottom surface of the lampshade  20  may be symmetrical, with respect to projections  21  and positioning grooves  22 . The diameter of the side wall  23  of lampshade  20  gradually expands from the bottom surface of lampshade  20  toward the opening, and the side wall  20  has a thread structure. A matching portion  24  is provided on the side wall  23  at the opening of the lampshade  20 . The matching portion  24  extends outside the side wall opening substantially parallel to the bottom surface of the lampshade  20 . 
     As shown in  FIG. 3 , and discussed above, the reflector  40  is trumpet-shaped with a small opening  41  and a large opening  43 . The outside of the wall of the reflector  40  is provided with three cylinders  42 , which are configured to correspond to the three projections  21  when the reflector  40  is assembled within lampshade  20 . In the present embodiment, the projections  21  and the cylinders  42  all have threaded holes, and may be joined together by screws. The small opening  41  of the reflector  40  has a flat circular edge, which is at the same level as the ends of the cylinders  42 . The outside of the reflector  40  is evenly provided with a plurality of slots  44  near the large opening  43 . 
     As shown in  FIG. 4 , the spring securing element  60 , which may be a metal elastic piece, has a fixing portion  61 , a connecting portion  62 , and a snap-fit portion  63 , which are preferably integrally formed. The end of the fixing portion  61  that is distal from the connecting portion  62  is provided with a hook portion  611 , which extends and forms an angle of 90° with the body of the fixing portion  61 . The connecting portion  62  extends at an angle from the non-hook end of the fixing portion  61 . The connecting portion  62  has the shape of a convex arc. The curvature of the connecting portion  62  is substantially the same with that of the outer side of the side wall  23  the lampshade  20 . The snap-fit portion  63  extends from the connecting portion  62  away from the end of the fixing portion  61  and is preferably snap-fit collar that may be cylindrical. 
     The snap-fit portion  63  comprises a first snap-fit portion  631  and a second snap-fit portion  632 , which extends from the first snap-fit portion  631 . The cross-section of the snap-fit portion  63  is S-shaped, and the cross-sectional radius of the first snap-fit portion  631  is larger than that of the second snap-fit portion  632 . A small gap is formed between the second snap-fit portion  632  and the connecting portion  62  for the metal torsion spring  70  to pass through. The end of the second snap-fit portion  632  extends outwardly. In other embodiments, the cross-sectional radius of the first snap-fit portion  631  may be less than or equal to that of the second snap-fit portion  632 . 
     As shown in  FIG. 5 , the metal torsion spring  70  is formed by a first small coil  71 , a large coil  73 , and a second small coil  72 , which are separately coiled in sequence. Among the coils, the large coil  73  may include a plurality of turns that are close to each other. A first straight torsion arm  74  extends from the first small coil  71 , a first fixing hook portion  75  is provided at the end of the first straight torsion arm  74 . A second straight torsion arm  76  extends from the second small circle  72 , a second fixing hook portion  77  is provided at the end of the second straight torsion arm  76 . The first straight torsion arm  74  and the second straight torsion arm  76  expand and extend toward a same side at an angle from each other. 
     As shown in  FIG. 6 , the lamp ring  80  is circular, and the inner edge of a first side of the lamp ring  80  is provided with an annular groove  81 . 
     The connection relationships among different components in the embedded LED lamp of the present utility model are further explained with references to  FIGS. 1-6 . 
     The screw holes for the three cylinders  42  provided at the back of the reflector  40  are disposed corresponding to the screw holes of the three projections  21  of the lampshade  20 . The cylinders  42  and the projections  21  may be fixed together through screws, so that the small opening  41  of the reflector  40  may be secured the inner side of the bottom of the lampshade  20 . The LED light module  30  is fixed at the inner side of the bottom of the lampshade  20  in the area surrounded by the small opening  41  of the reflector  40 . 
     As discussed, the outside of the bottom surface of lampshade  20  is provided with two positioning grooves  22  in a preferred embodiment. The housing  11  is engaged at an inner side of the positioning grooves  22 , which is closer to the center of the lampshade  20 . The fixing portion  61  of the spring securing element  60  is engaged at an outer, opposite side of the respective positioning grooves  22 , which is closer to the outer edge of the lampshade  20 , with the hook portions  611  extending into the grooves  22 . When the hook portions  611  extend into the respective positioning grooves  22 , the connecting portion  62  may be connected to or fitted with the outer side wall  23  of the lampshade  20 . At this time, the second small coil  73  of the metal torsion spring  70  can be passed through the small gap formed between the second snap-fit portion  632  and the connecting portion  62 , so that the metal torsion spring  70  can swing freely. 
     The outer edge of the lens  50  are provided with protrusions that correspond to with the plurality of slots  44  of reflector  40 , such that the lens  50  may be snap-fitted on the larger opening  43  of reflector  40 . 
     Before assembling the spring securing element  60  and the metal torsion spring  70 , assembly may require positioning the lamp ring  80  with the side of the lamp ring  80  that has the annular groove  81  facing downward. The lamp ring may sequentially be placed over the housing  11  (with the housing  11  opening facing downward) and the lampshade  20  (with the lampshade  20  opening facing downward), until that the annular groove  81  abuts against the matching portion  24  of the lampshade  20 . The depth of the annular groove  81  may be greater or equal to the thickness of the matching portion  24 , so that the lamp ring  80  and the lampshade  20  have a smooth connection after the lamp ring  80  is positioned on the matching portion  24 . 
     In alternative embodiments, the matching portion  24  may include an annular groove, and the lamp ring  80  may include a corresponding protrusion, so that a groove of the matching portion  24  and the protrusion of a lamp ring  80  would correspond during assembly. 
     In the embedded LED lamp of the present disclosure, during assembling, the lampshade  20  can be directly placed at the center through the annular groove  81 . In some embodiments, a cross-section of lamp ring  80  may be arc-shaped, enhancing the aesthetic view of the embedded LED lamp. The arc is preferably provided on the second side of the lamp ring  80 , opposite from the annual groove  81 . The color of the lamp ring  80  can be changed with a variety of choices. 
     In the embedded LED lamp of the present disclosure, the embedded LED lamp can be assembled with different types of light tubes  2  via the presence of at least one pair of a spring securing element  60  and a metal torsion spring  70 . As shown in  FIGS. 1 and 7 , more than one pair of a spring securing element  60  and a metal torsion spring  70  may be used. The fixing portion  61  of the spring securing element  60  is provided with a hook portion  611 , the curvature of the connecting portion  62  is substantially the same with that of the outer side of the side wall the lampshade  20 , and the cross-section of the snap-fit portion  63  is S-shaped. These characteristics may help make the assembling and disassembling of the spring securing element  60  and the metal torsion spring  70  simple and convenient. 
     In the embedded LED lamp of the present disclosure, the metal torsion spring  70  is composed of two small coils and a large coil that are coiled separately. The large coil is disposed between the two small coils and two straight torsion arms extend from the two small coils toward a same side at an angle from each other. This permits the first straight torsion arm  74  and the second straight torsion arm  76  to simultaneously exert pressure in opposite directions, facilitating assembling of the embedded LED lamp with different types of light tubes  2 . 
     In the embedded LED lamp of the present disclosure, the side wall  23  of the lampshade  20  is threaded, which endows the lampshade  20  with a more decorative feature, prevents light refraction, gives anti-glare effect, and can increase the heat dissipation area for better cooling effect. In addition, the lampshade  20  may comprise thermally conductive materials such as aluminum, which can further enhance the heat dissipation effect. 
     In the embedded LED lamp of the present disclosure, the outer side of the bottom of the lampshade  20  is provided with at least one positioning groove. In this way, the housing  11  can conveniently avoid the spring securing element  60  while being secured to the outer side of the bottom surface of the lampshade  20 . This facilitates assembly of an embedded LED lamp. 
     In the embedded LED lamp of the present disclosure, the outer side of the side wall of the reflector  40  is provided with a plurality of evenly spaced cylinder  42 , and a plurality of projections  21  are provided at the positions of the lampshade  20  that correspond to those of the cylinders  21 , which makes it more convenient to assemble the reflector  40  at the inner side of the bottom of the lampshade  20 . 
     The working principles of the embedded LED lamp according to the disclosure may be described with reference to  FIGS. 7 and 8 .  FIG. 7  depicts an embedded LED lamp of the present disclosure and a light tube before installation.  FIG. 8  depicts the connection of a metal torsion spring  70  and the light tube after installation of the embedded LED lamp of the present utility model and a light tube. 
     In this embodiment depicted in  FIG. 7 , the power supply device  10  further comprises a push-in terminal  13 . After assembling an embedded LED lamp, the push-in terminal  13  and the power supply connector  3  of light tube  2  are connected. 
     Next, the user can manipulate the first straight torsion arm  74  and the second straight torsion arm  76  simultaneously in toward one another, against the force of the spring, so that the first straight torsion arm  74  and the second straight torsion arm  76  are close to each other. Then, then the first straight torsion arm  74  and the second straight torsion arm  76  can be inserted into the light tube  2 . The inserted first straight torsion arm  74  and second straight torsion arm  76  are adjusted, so that the connection portion between the first straight torsion arm  74  and the first fixing hook portion  75  and the connection portion between the second straight torsion arm  76  and the second fixing hook portion  77  are fitted in a support  4  of the light tube  2 . 
     Finally, the embedded LED lamp is pushed into the light tube  2 , so that the embedded LED lamp is fully installed in light tube  2 . 
     An embedded LED lamp can be conveniently connected with different types of light tubes  2 , due to, for example, the presence of the push-in terminal  13 , the spring securing element  60 , and the metal torsion spring  70 ,  2 . 
     In the preceding specification, various preferred embodiments have been described with reference to the accompanying drawings. It will, however, be evident that various other modifications and changes may be made thereto, and additional embodiments may also be implemented, without departing from the broader scope of the invention as set forth in the claims that follow. 
     Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.