# US 2025/0155091 A1 · Light emitting diode (led) light bulb and string light using led light bulb

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- Number: US 2025/0155091 A1
- Document ID: US20250155091A1
- Status: Published application
- Kind: A1
- Application number: 18/745,110
- Filed: 2024-06-17
- Published: 2025-05-15
- Earliest claimed: 2023-11-13
- Inventors: SIJUN ZOU
- Web page: https://patentgrep.com/patent/US20250155091A1

## CPC

- F21K 9/232: specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
- F21S 4/10: with light sources attached to loose electric cables, e.g. Christmas tree lights
- F21V 19/0015: {Fastening arrangements intended to retain light sources}
- F21V 23/06: the elements being coupling devices {, e.g. connectors}
- F21V 31/00: Gas-tight or water-tight arrangements
- F21V 31/005: {Sealing arrangements therefor}
- F21Y 2103/10: comprising a linear array of point-like light-generating elements
- 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
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- 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

Disclosed are a light emitting diode (LED) light bulb and a string light using the LED light bulb. The LED light bulb includes an LED surface mounted device (SMD) lamp bead, a transparent lamp housing, and a rubber core. A metal lead lamp foot is in SMD welding to each connecting terminal of the LED SMD lamp bead, a waterproof rubber matrix is encapsulated in the LED SMD lamp bead. The string light includes a power line, a male connector, a female connector, and a plurality of lamp holders, and each lamp holder is equipped with the LED light bulb. Through the above structural design, the LED bulb and the string light using the LED bulb respectively have the advantages of a novel structural design, a simple assembly process, and low preparation cost.

## Claims

### Claim 1

A light bulb, comprising a light source, a lamp housing and a rubber core, wherein the light source includes a lamp bead, a waterproof rubber matrix is formed at the periphery of the lamp bead, a mounting hole is formed in a core portion of the rubber core, an upper end portion of the lamp housing is inserted into the mounting hole, the lamp bead is located in the mounting hole or an inner cavity of the lamp housing, the lamp bead is supported by the rubber core.

### Claim 2 (depends on 1)

The light bulb according to claim 1, further comprising a plurality of lamp feet, each of the lamp feet is in welding to the corresponding connecting terminal of the lamp bead.

### Claim 3 (depends on 2)

The light bulb according to claim 2, wherein the lamp housing is of a cavity structure with an opening in one end.

### Claim 4 (depends on 3)

The light bulb according to claim 3, wherein an upper end portion of the rubber core is provided with a through hole facing the opening, the through hole is connected to the mounting hole and is corresponding to the lamp foot, each lamp foot passes through the corresponding through hole and leans against an outer wall of the rubber core.

### Claim 5 (depends on 4)

The light bulb according to claim 4, wherein the lamp foot is a pin with a bent structure, and a bent end portion of the lamp foot passes through the corresponding through hole and leans against the outer wall of the rubber core.

### Claim 6 (depends on 1)

The light bulb according to claim 1, wherein the rubber core is provided with a limiting and stopping portion extending vertically downwards in the mounting hole, and the limiting and stopping portion and the rubber core are of an integrated structure.

### Claim 7 (depends on 1)

The light bulb according to claim 1, wherein the upper end portion of the lamp housing is provided with a clamping portion; and
the clamping portion of the lamp housing is embedded into the mounting hole, and an outer wall of the clamping portion is clamped by an inner wall of the mounting hole.

### Claim 8 (depends on 1)

The light bulb according to claim 1, wherein at least two lamp feet are welded to the lamp bead.

### Claim 9 (depends on 1)

The light bulb according to claim 1, wherein the outer wall of the rubber core is provided with a limiting shoulder portion.

### Claim 10

A light bulb, comprising a light source, a lamp housing and a rubber core, wherein a waterproof rubber matrix is formed at the periphery of the light source, the lamp housing is connected to the rubber core, the light source is located in a mounting hole of the rubber core or an inner cavity of the lamp housing, the light source is supported by the rubber core.

### Claim 11 (depends on 10)

The light bulb according to claim 10, further comprising a plurality of lamp feet, each of the lamp feet is in welding to the corresponding connecting terminal of the light source.

### Claim 12 (depends on 11)

The light bulb according to claim 11, wherein the lamp housing is of a cavity structure with an opening in one end.

### Claim 13 (depends on 12)

The light bulb according to claim 12, wherein an upper end portion of the rubber core is provided with a through hole facing the opening, the through hole is connected to the mounting hole and is corresponding to the lamp foot, each lamp foot passes through the corresponding through hole and leans against an outer wall of the rubber core.

### Claim 14 (depends on 13)

The light bulb according to claim 13, wherein the lamp foot is a pin with a bent structure, and a bent end portion of the lamp foot passes through the corresponding through hole and leans against the outer wall of the rubber core.

### Claim 15 (depends on 10)

The light bulb according to claim 10, wherein the rubber core is provided with a limiting and stopping portion extending vertically downwards in the mounting hole, and the limiting and stopping portion and the rubber core are of an integrated structure.

### Claim 16 (depends on 10)

The light bulb according to claim 10, wherein the upper end portion of the lamp housing is provided with a clamping portion; and
the clamping portion of the lamp housing is embedded into the mounting hole, and an outer wall of the clamping portion is clamped by an inner wall of the mounting hole.

### Claim 17 (depends on 10)

The light bulb according to claim 10, wherein at least two lamp feet are welded to the light source.

### Claim 18 (depends on 10)

The light bulb according to claim 10, wherein the outer wall of the rubber core is provided with a limiting shoulder portion.

### Claim 19

A string light, comprising a power line, a male connector connected to an end portion of the power line, and a female connector connected to the other end portion of the power line, the power line being equipped with successively arranged lamp holders, wherein each lamp holder is equipped with a light bulb which comprising a light source, a lamp housing and a rubber core, a waterproof rubber matrix is formed at the periphery of the light source, the lamp housing is connected to the rubber core, the light source is located in a mounting hole of the rubber core or an inner cavity of the lamp housing, the light source is supported by the rubber core.

### Claim 20 (depends on 19)

The string light according to claim 19, wherein a core portion of the lamp holder is provided with an insertion hole opened downwards, the power line extends into the insertion hole of the lamp holder and is electrically connected to connecting terminal lugs, and each lamp foot of the light bulb corresponds to one of the connecting terminal lugs; and
the upper end portion of the rubber core is inserted into the insertion hole of the lamp holder, and the bent end portion of each lamp foot is electrically connected to the corresponding connecting terminal lug.