Gas-free light bulb device

Patent metadata

Field	Value
Publication number	US-2018347802-A1
Application number	US-201715628468-A
Country	US
Kind code	A1
Filing date	Jun 20, 2017
Priority date	May 31, 2017
Publication date	Dec 6, 2018
Grant date	—

Abstract

A gas-free light bulb device has a lamp head, heatsink, a bulb, a glass core column, multiple filament assemblies, and a resilient extending element. The heatsink is mounted on the lamp head and has a mounting slot and a driver circuit board mounted in the mounting slot. The bulb is mounted on the heatsink and has a cavity. The glass core column is mounted in the mounting slot. The filament assemblies are mounted on the glass core column. The resilient extending element is mounted on the glass core and has a resilient rubber sleeve mounted around the glass core column and multiple resilient extending rubber bars connected respectively to the filament assemblies. When the gas-free light bulb device is operated with rising temperature, the resilient rubber sleeve is heated and loosened to slide upward and drive the filament assemblies to contact the bulb to effectively dissipate heat.

First claim

What is claimed is:

1 . A gas-free light bulb device comprising:
a lamp head; a heatsink mounted on the lamp head and having
a mounting slot defined in the heatsink; and
a driver circuit board mounted in the mounting slot;
a bulb mounted on the heatsink and having a cavity defined in the bulb; a glass core column mounted in the mounting slot of the heatsink and extending in the cavity of the bulb; multiple filament assemblies suspended on the glass core column indirectly electrically connected to the driver circuit board; and a resilient extending element mounted on the glass core column and having
a resilient rubber sleeve mounted around the glass core column, wherein a thermal expansion coefficient of the resilient rubber sleeve is higher than a thermal expansion coefficient of the glass core column; and
multiple resilient extending rubber bars formed on and protruding radially outward from the resilient rubber sleeve and corresponding to the multiple filament assemblies, and an outer end of each resilient extending rubber bar connected to a corresponding filament assembly;
wherein, when the gas-free light bulb device is not operated under room temperature, an inner diameter of the resilient rubber sleeve is not larger than an outer diameter of the glass core column such that the resilient rubber sleeve is mounted tightly on a lower position of the glass core column and is unable to slide, at the meantime, the resilient extending rubber bars are curved and apply resilient force to the filament assemblies and the resilient rubber sleeve; wherein, when the gas-free light bulb device is operated with rising temperature, the resilient rubber sleeve is heated and expanded to make the inner diameter larger than the outer diameter of the glass core column, at the meantime, the resilient rubber sleeve is loosened relative to the glass core column, and resilient force of the resilient extending rubber bar drives the resilient rubber sleeve to slide upward along the glass core column to an upper position of the glass core column and to pivot the multiple filament assemblies upward relative to the glass core column until the bottom end of each filament assembly contacts the bulb an inner wall of the cavity and conducts heat of each filament assembly to the bulb.

2 . The gas-free light bulb device as claimed in claim 1 , wherein the glass core column has multiple wire sets mounted on the glass core column and corresponding to the multiple filament assemblies, and each wire set having
an upper core wire mounted on a top end of the glass core column and connected to a top end of a corresponding filament assembly; and a lower core wire mounted on a bottom end of the glass core column and connected to a bottom end of the corresponding filament assembly.

3 . The gas-free light bulb device as claimed in claim 1 , wherein each resilient extending rubber bar has multiple wave-shaped resilient portions formed on the resilient extending rubber bar and connected to one another, and the wave-shaped resilient portions selectively compress or stretch.

4 . The gas-free light bulb device as claimed in claim 1 , wherein each resilient extending rubber bar has multiple Z-shaped resilient portions formed on the resilient extending rubber bar and connected to one another, and the Z-shaped resilient portions selectively compress or stretch.

5 . The gas-free light bulb device as claimed in claim 1 , wherein each resilient extending rubber bar has a spiral resilient portion formed on the resilient extending rubber bar, and the spiral resilient portion selectively compresses or stretches.

6 . The gas-free light bulb device as claimed in claim 1 , wherein each filament assembly is a filament-shaped LED module.

7 . The gas-free light bulb device as claimed in claim 1 , wherein the heatsink is made of metal.

8 . The gas-free light bulb device as claimed in claim 1 , wherein the heatsink is made of aluminum.

9 . The gas-free light bulb device as claimed in claim 1 , wherein the heatsink is made of copper.

10 . The gas-free light bulb device as claimed in claim 1 , wherein the heatsink is made of plastic.

11 . A gas-free light bulb device comprising:
a lamp head; a heatsink mounted on the lamp head and having
a mounting slot defined in the heatsink; and
a driver circuit board mounted in the mounting slot;
a bulb mounted on the heatsink and having a cavity defined in the bulb; a glass core column mounted in the mounting slot of the heatsink and extending in the cavity of the bulb; multiple filament assemblies suspended on the glass core column and indirectly electrically connected to the driver circuit board; and a resilient extending element mounted on the glass core column and having
a resilient rubber sleeve mounted around the glass core column, wherein a thermal expansion coefficient of the resilient rubber sleeve is higher than a thermal expansion coefficient of the glass core column; and
multiple resilient extending rubber bars formed on and protruding radially outward from the resilient rubber sleeve and corresponding to the multiple filament assemblies, and an outer end of each resilient extending rubber bar connected to a corresponding filament assembly;
wherein, when the gas-free light bulb device is not operated under room temperature, an inner diameter of the resilient rubber sleeve is not larger than an outer diameter of the glass core column such that the resilient rubber sleeve is mounted tightly on a lower position of the glass core column and is unable to slide, at the meantime, the resilient extending rubber bars are curved and apply resilient force to the filament assemblies and the resilient rubber sleeve.

12 . The gas-free light bulb device as claimed in claim 11 , wherein the glass core column has multiple wire sets mounted on the glass core column and corresponding to the multiple filament assemblies, and each wire set having
an upper core wire mounted on a top end of the glass core column and connected to a top end of a corresponding filament assembly; and a lower core wire mounted on a bottom end of the glass core column and connected to a bottom end of the corresponding filament assembly.

13 . The gas-free light bulb device as claimed in claim 11 , wherein each resilient extending rubber bar has multiple wave-shaped resilient portions formed on the resilient extending rubber bar and connected to one another, and the wave-shaped resilient portions selectively compress or stretch.

14 . The gas-free light bulb device as claimed in claim 11 , wherein each resilient extending rubber bar has multiple Z-shaped resilient portions formed on the resilient extending rubber bar and connected to one another, and the Z-shaped resilient portions selectively compress or stretch.

15 . The gas-free light bulb device as claimed in claim 11 , wherein each resilient extending rubber bar has a spiral resilient portion formed on the resilient extending rubber bar, and the spiral resilient portion selectively compresses or stretches.

16 . The gas-free light bulb device as claimed in claim 11 , wherein each filament assembly is a filament-shaped LED module.

17 . A gas-free light bulb device comprising:
a lamp head; a heatsink mounted on the lamp head and having
a mounting slot defined in the heatsink; and
a driver circuit board mounted in the mounting slot;
a bulb mounted on the heatsink and having a cavity defined in the bulb; a glass core column mounted in the mounting slot of the heatsink and extending in the cavity of the bulb; multi

Assignees

• Xiamen Eco Lighting Co Ltd

Inventors

• Fu Mingyan
• Cao Liangliang
• Bao Yongjun

Classifications

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21K9/238

  Arrangement or mounting of circuit elements integrated in the light source · CPC title

• F21V29/73 Primary

  the elements being adjustable with respect to each other, e.g. hinged · CPC title

• F21V29/50

  Cooling arrangements (air-treatment systems dissipating or using the heat of lighting fixtures F24F3/056) · CPC title

• F21K9/232 Primary

  specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb · CPC title