# US 2015/0146418 A1 · Retractable End-Cap For LED Tube

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- Number: US 2015/0146418 A1
- Document ID: US20150146418A1
- Status: Published application
- Kind: A1
- Application number: 14/135,319
- Filed: 2013-12-19
- Published: 2015-05-28
- Earliest claimed: 2013-11-27
- Assignees: Lightel Technologies, Inc.
- Applicants: Lightel Technologies, Inc.
- Inventors: Ching-Feng Lin; Chia-Yiu Maa; Chun-Te Yu; Pai-Sheng Shen
- Web page: https://patentgrep.com/patent/US20150146418A1

## CPC

- F21K 9/272: Details of end parts, i.e. the parts that connect the light source to a fitting; Arrangement of components within end parts (F21K9/278 takes precedence)
- F21V 25/04: breaking the electric circuit
- H01R 33/0836: {characterised by the lamp holding means}
- H01R 33/96: with switch operated by engagement or disengagement of coupling
- F21Y 2115/10: Light-emitting diodes [LED]
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

Embodiments of an end-cap for an LED tube are described. In one aspect, an end-cap for an LED tube may include an end-cap housing, at least one elastic component, and a connecting assembly. The end-cap housing may include at least one power pin thereon and configured to connect to an external power source. The elastic component may reside inside the end-cap housing. The end-cap housing may connect to a first end of the connecting assembly via an extendable connection and a second end of the connecting assembly opposite to the first end thereof connects to a body of the LED tube through at least one power connector. The power connector may connect to the at least one power pin when the elastic component is pressed. The power connector may remain separate from the at least one power pin when the elastic component is not pressed.

## Claims

### Claim 1

An end-cap of a light-emitting diode (LED) tube, comprising:
an end-cap housing;
at least one elastic component; and
a connecting assembly, wherein:
the end-cap housing includes at least one power pin thereon and configured to connect to an external power source,
the at least one elastic component resides inside the end-cap housing,
the end-cap housing connects to a first end of the connecting assembly via an extendable connection and a second end of the connecting assembly opposite to the first end thereof connects to a body of the LED tube through at least one power connector,
the power connector connects to the at least one power pin when the at least one elastic component is pressed, and
the power connector remains separate from the at least one power pin when the at least one elastic component is not pressed.

### Claim 2 (depends on 1)

The end-cap of claim 1, wherein the connecting assembly comprises:
at least one screw; and
at least one groove inside the end-cap housing along a longitudinal axis of the LED tube, wherein:
an upper half of the screw near a screw head of the at least one screw has no screw thread,
the at least one screw resides inside the at least one groove, and
a bottom half of the at least one screw fastens the end-cap housing onto the connecting assembly.

### Claim 3 (depends on 1)

The end-cap of claim 1, wherein the power connector comprises an elastic cylindroid.

### Claim 4 (depends on 3)

The end-cap of claim 3, wherein the power connector is retractable in a direction along the longitudinal axis of the LED tube, and wherein a retracting range of the power connector is between 1 and 10 mm approximately.

### Claim 5 (depends on 3)

The end-cap of claim 3, wherein the power connector contains a spring therein.

### Claim 6 (depends on 2)

The end-cap of claim 2, wherein the power connector comprises an elastic cylindroid.

### Claim 7 (depends on 6)

The end-cap of claim 6, wherein the power connector is retractable in a direction along the longitudinal axis of the LED tube, and wherein a retracting range of the power connector is between 1 and 10 mm approximately.

### Claim 8 (depends on 6)

The end-cap of claim 6, wherein the power connector contains a spring therein.

### Claim 9 (depends on 1)

The end-cap of claim 1, wherein when the at least one elastic component is not pressed, a distance of separation between the power connector and the at least one power pin is between 2 and 10 mm approximately.

### Claim 10 (depends on 2)

The end-cap of claim 2, wherein when the at least one elastic component is not pressed, a distance of separation between the power connector and the at least one power pin is between 2 and 10 mm approximately.

### Claim 11 (depends on 1)

The end-cap of claim 1, wherein the at least one elastic component comprises a spring.

### Claim 12 (depends on 2)

The end-cap of claim 2, wherein the at least one elastic component comprises a spring.