LED lamp having sleeve and lamp neck

• US 10,677,441 B2
• Filed: 09/12/2019
• Issued: 06/09/2020
• Est. Priority Date: 02/08/2018
• Status: Active Grant

• Current Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Original Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Inventors: Jiang, Tao, Wang, Mingbin, Xiong, Aiming, Zhou, Lin
• Primary Examiner(s): Alavi, Ali
• Application Number:
  US16/568,283
• Publication Number:
  US 20200018472A1
• Time in Patent Office: 271 Days
• Field of Search: 362294
• CPC Class Codes: F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21K 9/235 Details of bases or caps, i.e. the parts that connect the light source to a fitting; Arrangement of components within bases or caps F21K9/238 takes precedence
• CPC Class Codes: F21K 9/237 Details of housings or cases, i.e. the parts between the light-generating element and the bases; Arrangement of components within housings or cases F21K9/238 takes precedence
• CPC Class Codes: F21K 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/66 Details of globes or covers forming part of the light source
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 29/503 of light sources cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H01L33/64
• CPC Class Codes: F21V 29/508 of electrical circuits
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of 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 7/0025 Combination of two or more reflectors for a single light source array of reflectors for a cluster of light sources F21V7/0083
• CPC Class Codes: F21Y 2103/33 annular
• CPC Class Codes: F21Y 2105/18 annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H03H 11/04 Frequency selective two-port networks
• CPC Class Codes: H03H 7/0115 comprising only inductors and capacitors H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence
• CPC Class Codes: H05B 45/00 Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 45/37 Converter circuits
• CPC Class Codes: H05B 45/395 Linear regulators
• CPC Class Codes: H05B 45/56 : involving measures to prevent abnormal temperature of the LEDs
• CPC Class Codes: Y02B 20/00 : Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
• CPC Class Codes: Y02B 20/30 : Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source having a first portion and a second portion; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working, and the first chamber is located between bottom of the LED lamp and an upper portion of the lamp neck; and a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink; wherein the sleeve has a first positioning unit, the lamp neck has a second positioning unit, the sleeve can be connected with the lamp neck by engaging the first positioning unit and the second positioning unit, the first positioning unit is an engaging portion on the sleeve, and the second positioning unit is a latch on the lamp neck.

Claims

1. An LED (light emitting diode) lamp comprising:

a lamp shell including a lamp head, a lamp neck and a sleeve, the lamp head connects to the lamp neck which connects to the sleeve;

a passive heat dissipating element having a heat sink connected to the lamp shell, wherein the heat sink comprises fins and a base, the sleeve of the lamp shell is located in the heat sink, the lamp neck projects from the heat sink, height of the lamp neck is at least 80% of height of the heat sink;

a power source having a first portion and a second portion, wherein the first portion of the power source is disposed in both the lamp neck and the lamp head of the lamp shell, and the second portion of the power source is disposed in the heat sink of the passive heat dissipating element;

a light emitting surface connected to the heat sink of the passive heat dissipating element and includes LED chip sets having LED chips, the LED chips electrically connected to the power source, wherein the light emitting surface and the heat sink are connected to form a heat transferring path from the LED chips to the passive heat dissipating element;

a first heat dissipating channel formed in a chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working, and the chamber is located between bottom of the LED lamp and an upper portion of the lamp neck; and

a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink;

wherein the first heat dissipating channel comprises a first end on the light emitting surface to allow air flowing from outside of the LED lamp into the chamber, and a second end on the upper portion of the lamp neck of the lamp shell to allow air flowing from inside of the chamber out to the LED lamp;

wherein the second heat dissipating channel comprises a third end on the light emitting surface to allow air flowing from outside of the LED lamp into the second heat dissipating channel, and flowing out from spaces between every adjacent two of the fins;

wherein an aperture is located in a central region of the light emitting surface, and the aperture forms an air intake of both the first heat dissipating channel and the second heat dissipating channel;

wherein the sleeve has a first positioning unit, the lamp neck has a second positioning unit, the sleeve can be connected with the lamp neck by engaging the first positioning unit and the second positioning unit, the first positioning unit is an engaging portion on the sleeve, and the second positioning unit is a latch on the lamp neck.

2. The LED lamp of claim 1, wherein the sleeve has a connecting portion, the connecting portion includes two sheet-shaped bodies on a circumferential portion of the LED lamp, and the first positioning unit is formed on the sheet-shaped bodies.

3. The LED lamp of claim 2, wherein two gaps are formed between the two sheet-shaped bodies and the gaps constitute a positioning trough, and the lamp neck has a third positioning unit corresponding to the positioning trough.

4. The LED lamp of claim 3, wherein the power source includes a power board, the lamp neck has a slot formed between the two sets of plates, and the power board is inserted to the slot.

5. The LED lamp of claim 4, wherein the two sets of plates are disposed along an axial direction of the LED lamp, and a gap is kept between the two sets of plates.

6. The LED lamp of claim 5, wherein the ratio of length of the lower set of plates in the axial direction of the lamp neck to length of the power board is 1:

14˜

22.

7. The LED lamp of claim 6, wherein a first stopping portion is provided in the lamp neck to correspond to the power board, the first stopping portion keep a gap between the power board and an end portion of the lamp head, the sleeve has a second stopping portion corresponding to the power board, both the first stopping portion and the second stopping portion limit two sides of the power board in the axial direction to fasten the power board in the axial direction.

8. The LED lamp of claim 7, wherein the second end comprises a venting hole, the lamp neck has an airflow limiting surface which extends radially outwardly and is located away from the venting hole, and the airflow limiting surface cloaks at least part of the fins.

9. The LED lamp of claim 8, wherein an outer wall of the sleeve is provided with a passage to make part of convection air pass through the passage to reach the heat sink.

10. The LED lamp of claim 9, wherein the sleeve is provided with a wire pressing portion downward projecting from a bottom edge of the sleeve, the wire pressing portion is formed with a wire pressing trench.

11. The LED lamp of claim 10 further comprising a lamp cover connected with the heat sink, wherein the sleeve has a fourth positioning unit, and the lamp cover has a fifth positioning unit, and the fifth positioning unit corresponds to the fourth positioning unit to limit rotation of the sleeve against the lamp cover.

12. The LED lamp of claim 11, wherein the sleeve is made of a material whose thermal conductivity is less than that of the material of which the lamp neck is made.

13. The LED lamp of claim 12, wherein the lamp neck has an upper portion and a lower portion, the venting hole is located in the upper portion, and cross-sectional area of the upper portion is less than cross-sectional area of the lower portion.