Water-resistant and replaceable LED lamps

• US 7,883,261 B2
• Filed: 10/20/2008
• Issued: 02/08/2011
• Est. Priority Date: 04/08/2008
• Status: Active Grant

• Current Assignee: Santa's Best
• Original Assignee: 1 Energy Solutions Incorporated
• Inventors: Yu, Jing Jing
• Primary Examiner(s): Lee; Jong-Suk (James)
• Assistant Examiner(s): May; Robert J
• Application Number:
  US12/254,787
• Publication Number:
  US 20090251923A1
• Time in Patent Office: 841 Days
• Field of Search: 362652-659, 362/249.02, 362/249.06, 362/249.14, 362/249.16, 439/619, 439/699.1, 439/699.2
• US Class Current: 362/652
• CPC Class Codes: F21S 4/10 with light sources attached to loose electric cables, e.g. Christmas tree lights
• CPC Class Codes: F21V 17/06 the fastening being onto or by the lampholder
• CPC Class Codes: F21V 19/0005 of sources having contact pins, wires or blades, e.g. pinch sealed lamp F21V19/001 takes precedence
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01R 33/06 with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
• CPC Class Codes: H01R 33/965 Dustproof, splashproof, drip-proof, waterproof, or flameproof holders

Abstract

Disclosed is waterproof lamp assembly that allows easy assembly and disassembly. LED elements can be quickly and easily replaced if an LED element is defective or burns out. Extended connectors are used that extend beyond an overmolded lamp holder so that the lamp holder can be easily molded without covering the connectors with molding material. The connectors are made from a malleable metal so that the connectors can be folded into a central opening in the lamp holder.

Claims

1. A waterproof lamp assembly for use in an LED light string comprising:

wires that are connected to said light string;

a lamp holder that is overmolded around said wires, said lamp holder having a central opening that has a specified shape;

a pair of connectors that extend outwardly from said lamp holder adjacent to said central opening so that said lamp holder can be overmolded around lower portions of said connectors without covering extended portions of said connectors that extend beyond said lamp holder, said connectors made from a malleable material so that said connectors can be bent and folded into said central opening of said lamp holder;

a snap ring disposed around a peripheral portion of said lamp holder;

a lamp holder cover having a first opening and a second opening at opposite ends of said lamp holder cover;

a snap recess disposed in said second opening that engages said snap ring to create a watertight seal between said lamp holder cover and said lamp holder;

a socket having an extended portion, said extended portion having a shape that substantially matches said specified shape of said central opening of said lamp holder;

an LED element having LED leads that extend through openings in said socket and wrap around said extended portion of said socket so that said LED leads abut against said connectors when said connectors are folded into said central opening of said lamp holder and said extended portion of said socket is inserted in said central opening of said lamp holder, said socket extending through said lamp holder so that said LED element extends outwardly from said first opening of said lamp holder;

a lamp cover having a base that fits into said first opening of said lamp holder cover and provides a watertight seal between said lamp cover and said lamp holder cover.

2. The lamp assembly of claim 1 further comprising:

external screw threads disposed on said base of said lamp cover;

internal screw threads disposed in said first opening of said lamp holder cover that substantially match said external screw threads disposed on said base of said lamp cover.

3. A waterproof lamp assembly for use in a light string comprising:

a lamp cover;

a lamp cover base attached to said lamp cover;

a socket having internal openings and an extended portion;

an LED element having LED leads that extend through said internal openings in said socket and are folded around an exterior surface of said extended portion of said socket, said extended portion having a predetermined shape;

wires connected to said light string;

a lamp holder that is overmolded around said wires to prevent moisture from entering said lamp holder, said lamp holder having a central opening that has a predetermined shape that substantially matches said predetermined shape of said extended portion of said socket;

connectors having a lower portion that is overmolded in said lamp holder, and upper portions that extend outwardly from said lamp holder that are not overmolded, said connectors made from a malleable material and folded into said central opening of said lamp holder so that said LED leads disposed on said outer surface of said extended portion of said socket abut against said connectors and form an electrical connection when said socket is inserted into said central opening of said lamp holder.

4. The lamp assembly of claim 3 further comprising:

a sealing surface disposed around said lamp holder that engages a surface of said base of said lamp cover to provide a watertight seal.

5. The lamp assembly of claim 4 further comprising:

internal threads disposed on an interior portion of said lamp base;

external threads disposed on an extended portion of said lamp holder that substantially match said internal threads.

6. A method of providing a lamp assembly for an LED light string that is watertight and allows replacement of an LED element comprising:

overmolding wires connected to said LED light string and lower portions of conductors attached to said wires to form a lamp holder having a central opening, said central opening having a predetermined shape;

providing extended portions of said conductors that extend outwardly from said lamp holder that are not overmolded;

folding said extended portions of said conductors into said central opening in said lamp holder;

providing a snap ring around a peripheral portion of said lamp holder;

forming a lamp holder cover having a first opening on a first end of said lamp holder cover, and a second opening that communicates with said first opening on a second end of said lamp holder cover;

providing a snap recess in said second opening of said lamp holder cover that engages said snap ring of said lamp cover to form a watertight seal between said lamp holder cover and said lamp holder;

providing a socket having an extended portion and openings formed in a central portion of said socket, said extended portion of said socket having a predetermined shape that substantially matches said predetermined shape of said central opening of said lamp holder;

inserting LED leads connected to said LED element through said openings in said socket;

folding said LED leads that extend beyond said extended portion of said socket around an outer peripheral portion of said extended portion of said socket;

inserting said socket into said central opening of said lamp holder so that said LED leads abut against said connectors in said opening in said lamp holder to form an electrical contact;

attaching a lamp cover to said first opening of said lamp holder.

7. The method of claim 6 wherein said process of attaching said lamp cover to said lamp holder cover comprises:

screwing external threads formed on said lamp cover into internal threads formed in said lamp holder cover.

8. A method of providing a lamp assembly for an LED light string that is watertight and allows replacement of an LED element comprising:

overmolding wires connected to said LED light string and lower portions of conductors attached to said wires to form a lamp holder having a central opening, said central opening having a predetermined shape;

providing extended portions of said conductors that extend outwardly from said lamp holder that are not overmolded;

folding said extended portions of said conductors into said central opening in said lamp holder;

providing a socket having an extended portion and openings formed in a central portion of said socket, said extended portion of said socket having a predetermined shape that substantially matches said predetermined shape of said central opening of said lamp holder;

inserting LED leads connected to said LED element through said openings in said socket;

folding said LED leads that extend beyond said extended portion of said socket around an outer peripheral portion of said extended portion of said socket;

inserting said socket into said central opening of said lamp holder so that said LED leads abut against said connectors in said opening in said lamp holder to form an electrical contact;

attaching a lamp cover to said first opening of said lamp holder.

9. The method of claim 8 wherein said process of attaching said lamp cover to said lamp holder comprises:

screwing internal threads formed on said lamp cover onto external threads formed in said lamp holder.