LED daylight lamp tube

• US 8,408,742 B2
• Filed: 03/14/2011
• Issued: 04/02/2013
• Est. Priority Date: 03/14/2011
• Status: Expired due to Fees

• Current Assignee: Shenzhen Eviteo Imp&Exp Co., Ltd.
• Original Assignee: Shenzhen Eviteo Imp&Exp Co., Ltd.
• Inventors: Tran, Binh
• Primary Examiner(s): Dzierzynski, Evan
• Assistant Examiner(s): ALLEN, DANIELLE NICOLE
• Application Number:
  US13/046,975
• Publication Number:
  US 20120236562A1
• Time in Patent Office: 750 Days
• Field of Search: 362/551, 362/555, 362/166, 362/171, 362/178, 362/217.01, 362/218, 362/221, 362/227, 362/230, 362/231, 362/236, 362/237, 362/240, 362/249.01, 362/249.02, 362/260, 362/311.02
• US Class Current: 362/249.02
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 15/015 Devices for covering joints between adjacent lighting devices; End coverings
• CPC Class Codes: F21V 19/0045 by tongue and groove connections, e.g. dovetail interlocking means fixed by sliding
• CPC Class Codes: F21V 21/30 Pivoted housings or frames
• CPC Class Codes: F21V 29/713 in direct thermal and mechanical contact of each other to form a single system
• CPC Class Codes: F21V 29/777 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The invention discloses an LED daylight lamp tube, comprising a tube body and caps fixedly connected to two ends of the tube body, wherein the tube body comprises: an axial bar-shaped radiator, a radiating face of which is fan-shaped and a heat conducting face of which is provided with at least two axial bar-shaped slots forming included angle; an illuminant, which comprises PCB aluminum substrates corresponding in amount to the bar-shaped slots of the radiator, wherein the front face of each of the PCB aluminum substrates is equipped with a plurality of LED illuminants and the PCB aluminum substrates are clamped in the bar-shaped slots of the radiator; a bar-shaped heat conducting gasket, which is adhered to the back face of the PCB aluminum substrate in a fitting manner and clamped between the PCB aluminum substrate and a heat conducting face of the bar-shaped slot; and a circular arc lampshade, which is in clamped connection with two sides of the radiator and forms the cylindrical tube body with the radiator together. According to the LED daylight lamp tube of the invention, the PCB aluminum substrates of the LED illuminants are installed on the fan-shaped radiator at an included angle of 210 degrees, and wide-angle illumination of the LED daylight lamp tube is realized through the two movable caps arranged at two ends of the tube, in addition, the LED daylight lamp tube has better radiating effect and longer service life.

Claims

1. A light emitting diode fluorescent tube comprising a tube body and caps fixedly connected to two ends of the tube body, characterized in that:

the tube body comprises;

an axial bar-shaped radiator, a radiating face of which is fan-shaped and a heat conducting face of which is provided with at least two axial bar-shaped slots forming an included angle;

an illuminant, which comprises printed circuit board aluminum substrates corresponding in amount to the bar-shaped slots of the radiator, wherein the front face of each of the printed circuit board aluminum substrates is equipped with a plurality of light emitting diode illuminants and the printed circuit board aluminum substrates are clamped in the bar-shaped slots of the radiator;

a bar-shaped heat conducting gasket, which is adhered to the back face of the printed circuit board aluminum substrate in a fitting manner and clamped between the printed circuit board aluminum substrate and a heat conducting face of the bar-shaped slot;

a circular arc lampshade, which is in clamped connection with two sides of the radiator and forms the cylindrical tube body with the radiator together;

wherein the cap comprises;

two opposite fixed parts, which are fixedly connected to two ends of the tube body, respectively; and

two opposite movable parts, which are movably connected with the other end of each of the two fixed parts respectively so that the movable parts can be rotated within a set angle in opposition to the fixed parts;

wherein the opposite fixed part is a lamp body holder with one end face fixed at the end of the tube body and the other end face provided with a cylindrical sleeve protruding from the end face, the inner wall of the cylindrical sleeve is provided with an annular buckle, the end face of the lamp body holder at the outer side of the cylindrical sleeve is provided with an annular groove coaxial with the tube, and a plurality of arc grooves are arranged on the inner wall of the annular groove uniformly; and

the opposite movable part comprises;

a cap shaft sleeve, wherein one end of the cap shaft sleeve is sleeved with a connecting sleeve the end face of which is fixed with a connecting plate fixation base;

the other end of the cap shaft sleeve is provided with a cylindrical sleeve post protruding from the end face and fit for the cylindrical sleeve of the lamp body holder, the outer circumferential face of the cylindrical sleeve post is provided with an annular buckle fit for the buckle on the inner wall of the cylindrical sleeve, the cylindrical sleeve post is provided with a cutting groove for the elastic deformation of the annular buckle; and

the end face of the cap shaft sleeve at the outer side of the cylindrical sleeve post is provided with an annular groove;

a rotating sleeve, wherein the rotating sleeve is arranged between the lamp body holder and the cap shaft sleeve and is provided with an annular connecting part fit for the annular groove of the lamp body holder and a sleeve connected with the annular groove on the end face of the cap shaft sleeve, and the side face of the annular connecting part is provided with an arc protrusion fit for the arc groove.

2. The light emitting diode fluorescent tube according to claim 1, characterized in that the bar-shaped radiator is integrally formed by aluminum alloy and is internally provided with an axial hollow cavity.

3. The light emitting diode fluorescent tube according to claim 1, characterized in that the heat conducting gasket is a heat conducting silica gel gasket with high coefficient of heat conductivity.

4. The light emitting diode fluorescent tube according to claim 1, characterized in that the end face of the lamp body holder is provided with a 180-degree arc groove coaxial with the lamp body holder, and the end face of the cap shaft sleeve, corresponding to the arc groove of the lamp body holder, is provided with a limit protrusion fit for the arc groove.

5. The light emitting diode fluorescent tube according to claim 1, characterized in that the opposite movable part further comprises:

two tube installation sleeved holders, which are sleeved with the two ends of the tube respectively and are electrically connected with the tube;

and two cap pressing blocks, which are installed at two ends of the two tube installation sleeved holders, respectively.