Patent Publication Number: US-9841148-B1

Title: Electrical connection structure of lamp cap

Description:
CROSS REFERENCE 
     The present application is a continuation-application of U.S. patent application Ser. No. 15/432,009 filed on Feb. 14, 2017 which in turn is a continuation-application of U.S. patent application Ser. No. 15/113,837 filed on Jul. 24, 2016, now U.S. Pat. No. 9,605,811. 
    
    
     FIELD OF INVENTION 
     The present invention relates to LED illumination field and more particularly is a type of an electrical structure of a lamp cap. 
     BACKGROUND 
     In recent years, LED chips as illumination source used in indoor illumination field are developed rapidly. People continuously discover LED lamps that are easily manufactured and have stability. A traditional LED lamp structure mainly includes five parts of a bulb head, a driver, a radiator, a LED aluminum substrate and a bulb housing, where the LED aluminum substrate and the driver are of a separate style, and the driver and the LED light source are connected via melding. For example, the China invention patent, issued and published on Aug. 15, 2013 with patent No. 201320502252.5, disclosed a type of LED lamp structure piece. The LED lamp structure piece includes a lamp housing, a radiator, a LED light source plate, and a lamp cap, where the radiator includes a radiator base, cooling fin, and a hollow tube, the hollow tube is located below the radiator base and connected to the radiator base, and the hollow tube has a inside space for containing LED driver source. 
     Because the driver source is contained in the sleeve tube in the center of the radiator, when the driver source is connected with the LED source plate, electrical wires need to be go through the center of the radiator and fixed to the LED aluminum substrate via melding, which is complicated on assembling and causes high manufacturing cost. 
     SUMMARY OF INVENTION 
     Technical Problem 
     In view of such, there is a need to provide a bulb head electrical connection structure that has simple structure for automatic assembling. 
     Solution for Problem 
     The technical solution of the present invention is: a lamp cap electrical connection structure including a substrate, a plastic piece, and a lamp cap, in which the lamp cap includes a first electrode and a second electrode, the first electrode is insulated from the second electrode, the second electrode is fixed relative to the first electrode, the plastic piece is disposed above the first electrode, the substrate is fixed on the plastic piece, the substrate has electronic components and has a first connection end and a second connection end electrically connecting to the electronic components, the first electrode and the first connection end are electrically connected, the second electrode is a lever structure, the second connection end includes a connection part and a contact part, the connection part is electrically connected to the electronic components on the substrate, and the contact part is electrically connected to one end of the second electrode. 
     Compared with conventional art, the lamp cap electrical connection structure has electronic components and the LED light source disposed on the substrate at the same time and has the first connection end and the second connection end disposed on the substrate and electrically connected to the electronic components for the first electrode of the lamp cap being electrically connected to the first connection end, and for the second electrode of the lamp cap being electrically connected to the second connection end, so as to remove the need for disposing electrical wires for performing electrical connection and to perform electrical connection between the driver circuit and the lamp cap while fixing the substrate, and such design simplifies the structure, performs easy installation, has simple structures and is easy to be assembled automatically. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an exploded perspective diagram of a lamp cap electrical connection structure in a first embodiment of the present invention. 
         FIG. 2  is a main view diagram of the lamp cap electrical connection structure of  FIG. 1 . 
         FIG. 3  is a perspective diagram of the lamp cap electrical connection structure of  FIG. 1  by removing a plastic piece and a radiator along another angle. 
         FIG. 4  is a sectional view along A-A line in  FIG. 2 . 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  is an exploded perspective diagram of a new utility lamp cap electrical connection structure  100 , where the lamp cap electrical connection structure  100  includes a substrate  20 , a plastic piece  50 , a lamp cap  60 , and a radiator  80 . The lamp cap  60  includes a first electrode  61  and a second electrode  62 , the first electrode  61  is insulated from the second electrode  62 , and the second electrode  62  is fixed relative to the first electrode  61 . The lamp cap  60  is a regular screw lamp cap, and the first electrode  61  is the lamp cap housing. The plastic piece  50  is disposed above the first electrode  61 , and the substrate  20  is fixed on the plastic piece  50 . The plastic piece  50  is a circular housing structure with openings on both its top and bottom. The substrate  20  has LED light source  30  disposed on its front side, and the LED light source is disposed in the middle of the substrate. The substrate  20  is also integrated with a driver IC chip  40 , and also, other electronic components may be disposed and a circuit board may be used for connecting the electronic components. The radiator  80  includes a top plate  81  and a side wall  82  with integral forming, the substrate  20  is fixed on the top plate  81 , the side wall  82  is disposed inside the plastic piece  50  and the plastic piece  50  insulates the side wall  82  from outside so that the lamp cap electrical structure  100  is complied with safety standard requirement. 
     Please refer to  FIG. 3 , in which the substrate  20  is an aluminum substrate, the substrate  20  has a first connection end  21  and a second connection end  22 , the first electrode  61  and the first connection end are electrically connected, the second electrode  62  is a lever structure, the second connection end  22  includes a connection part  222  and a contact part  221 , the connection part  222  is electrically connected to the electronic components on the substrate  20 , and the contact part  221  is electrically connected to one end of the second electrode  62 . 
     The first electrode  61  may further include an insulation sleeve  64 , the insulation sleeve  64  is fixed at the bottom of the first electrode  61 , the insulation sleeve  64  has a containing hole (not shown) in its middle part, and the second electrode  62  is disposed in the containing hole. A supporting sleeve  63  is disposed around the containing hole in the middle part of the insulation sleeve  64 , the inner wall of the supporting sleeve  63  corresponds to the second electrode  62 , the outer wall of the second electrode  62  has a barb (not shown), and the barb is hooked to the inner wall of the supporting sleeve  63 . The second connection end  22  is disposed at the back side of the substrate  20 , the contact part  221  includes a pair of elastic strips  2211  opposing to each other, and one end of the second electrode  62  is plugged between the two elastic strips  2211  to perform electrical connection. The connection part  222  is a sheet structure, the connection part  222  and the contact part  221  are made with integral forming, the connection part  222  has a connection pin  2221 , and the connection pin  2221  is fixed at the back side of the substrate  20 . 
     Please refer to  FIG. 4 , in which the radiator  80  is made of conductive material, the side wall  82  of the radiator  80  is electrically connected to the first electrode  61 , the first connection end  21  is disposed at the back side of the substrate  20 , the substrate  20  is fixed at the top side of the top plate via a screw  70 , and the first connection end  21  is electrically connected to the top plate  81  of the radiator  80 . 
     During operation, the first connection end  21  of the substrate  20  is electrically connected to the top plate  81  of the radiator  80 , and the first connection end  21  is able to electrically connect to the first electrode  61  because the side wall of the radiator  80  is electrically connected to the first electrode  61 . The second connection end  22  disposed on the back side of the substrate  20  has two elastic strips  2211  disposed at its contact part  221  so that one end of the second electrode  62  with a lever structure is plugged between the two elastic strips  2211  so that the second connection end  22  is electrically connected to the second electrode  62 . With such, the first connection end  21  and the second connection end  22  may supply electricity to the electronic components on the substrate  20  like LED light source  30  or the driver IC chip  40 . 
     In summary, the lamp cap electrical connection structure  100  has both a driver IC chip  40  and LED light source  30  on its substrate  20  at the same time, and has the first connection end  21  and the second connection end  22  disposed on the substrate  20  and electrically connected to the electronic components on the substrate  20 , so that the lamp cap has the first electrode  61  electrically connected to the first connection end  21  and the second electrode  62  electrically connected to the second connection end  22  to remove the need of disposing electrical wires for performing electrical connection and to perform electrical connection between the driver circuit and the lamp cap while fixing the substrate for simplifying structure and for having advantages of simple structure. In addition, the second connection end  22  is disposed at the back side of the substrate  20 , not affecting the placement of the LED light source  30  on the front side of the substrate  20  so as to preserve larger space for light device design. The lamp cap  60  is not limited to screw head lamp, and may be other type of lamp cap like a socket lamp cap. It is only needed to change the second electrode  62  as a lever structure.