# US 2024/0200770 A1 · Light guide structure of earphone charging case

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- Number: US 2024/0200770 A1
- Document ID: US20240200770A1
- Status: Published application
- Kind: A1
- Application number: 18/324,162
- Filed: 2023-05-26
- Published: 2024-06-20
- Earliest claimed: 2022-12-16
- Assignees: Guoguang Electric Company Limited
- Applicants: Guoguang Electric Company Limited
- Inventors: ZHENHUA LIU; JUNMING LIU; RONG HUANG
- Web page: https://patentgrep.com/patent/US20240200770A1

## CPC

- F21V 33/0056: {Audio equipment, e.g. music instruments, radios or speakers}
- G02B 6/0076: {Stacked arrangements of multiple light guides of the same or different cross-sectional area}
- G02B 6/262: {Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements}
- H04R 1/1025: Accumulators specially adapted for earpieces; Arrangements specially adapted for charging thereof
- F21V 2200/00: Use of light guides, e.g. fibre optic devices, in lighting devices or systems
- F21Y 2115/10: Light-emitting diodes [LED]
- H02J 7/731: {specially adapted for holding portable devices containing batteries (H02J7/751 takes precedence)}
- H04R 2460/17: Hearing device specific tools used for storing or handling hearing devices or parts thereof, e.g. placement in the ear, replacement of cerumen barriers, repair, cleaning hearing devices
- Y02E 60/10: Energy storage using batteries
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- 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
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present utility model belongs to the technical field of charging cases, and discloses a light guide structure of an earphone charging case, including a charging case and earphones. A shell of the charging case is provided with a shell light guide element, and the element penetrates the shell. The earphone is provided with a light source. When the earphone is placed in the charging case, light generated by the earphone light source can be transmitted to the shell light guide element, making the guide element emits light. The light guide structure of the earphone charging case use the light source of the earphone directly through optical simulation so as to realize secondary light guide, so that the shell of the charging case emits light, no additional light source is required, costs are reduced, the size of charging case can be effectively reduced, and miniaturization and lightweight can be realized.

## Claims

### Claim 1

A light guide structure of an earphone charging case, comprising
a charging case (1), wherein a shell of the charging case (1) is provided with a shell light guide element (11), and the shell light guide element (11) penetrates the shell; and
earphones (2), wherein the earphone (2) is provided with a light source (21), and the light source (21) is capable of transmitting light to the shell light guide element (11) when emitting light, so that the shell light guide element (11) emits light.

### Claim 2 (depends on 1)

The light guide structure of an earphone charging case according to claim 1, wherein the shell light guide element (11) comprises an inner light guide element (111) and an outer light guide element (112), the inner light guide element (111) is embedded in an inner wall of the shell, the outer light guide element (112) is embedded in an outer wall of the shell, and the inner light guide element (111) is capable of transmitting the light to the outer light guide element (112).

### Claim 3 (depends on 2)

The light guide structure of an earphone charging case according to claim 2, wherein a cross-sectional area of the inner light guide element (111) is greater than that of the outer light guide element (112).

### Claim 4 (depends on 1)

The light guide structure of an earphone charging case according to claim 1, wherein the light source (21) is provided with an earphone light guide element (22), and for the earphone light guide element (22), the light generated by the light source (21) may be transmitted to the shell light guide element (11) through the earphone light guide element (22).

### Claim 5 (depends on 4)

The light guide structure of an earphone charging case according to claim 4, wherein the earphone light guide element (22) is L-shaped, the light source (21) is disposed at an entry end of the earphone light guide element (22), and the light generated by the light source (21) is refracted by 90° and is emitted from an exit end of the earphone light guide element (22).

### Claim 6 (depends on 5)

The light guide structure of an earphone charging case according to claim 5, wherein an outer corner of the earphone light guide element (22) is provided with an inclined surface (221).

### Claim 7 (depends on 4)

The light guide structure of an earphone charging case according to claim 4, wherein an outer surface of the earphone light guide element (22) is machined through a mirror polishing process.

### Claim 8 (depends on 4)

The light guide structure of an earphone charging case according to claim 4, wherein a distance H between the exit end of the earphone light guide element (22) and a portion, protruding from the inner wall of the shell, of the shell light guide element (11) is 4 mm-7 mm.

### Claim 9 (depends on 1)

The light guide structure of an earphone charging case according to claim 1, wherein the shell light guide element (11) has a transmittance of 50%, and the earphone light guide element (22) has a transmittance of 80%.

### Claim 10 (depends on 1)

The light guide structure of an earphone charging case according to claim 1, wherein the earphones (2) are both provided with the light sources (21).

### Claim 11 (depends on 2)

The light guide structure of an earphone charging case according to claim 2, wherein the earphones (2) are both provided with the light sources (21).

### Claim 12 (depends on 3)

The light guide structure of an earphone charging case according to claim 3, wherein the earphones (2) are both provided with the light sources (21).

### Claim 13 (depends on 4)

The light guide structure of an earphone charging case according to claim 4, wherein the earphones (2) are both provided with the light sources (21).

### Claim 14 (depends on 5)

The light guide structure of an earphone charging case according to claim 5, wherein the earphones (2) are both provided with the light sources (21).

### Claim 15 (depends on 6)

The light guide structure of an earphone charging case according to claim 6, wherein the earphones (2) are both provided with the light sources (21).

### Claim 16 (depends on 7)

The light guide structure of an earphone charging case according to claim 7, wherein the earphones (2) are both provided with the light sources (21).

### Claim 17 (depends on 8)

The light guide structure of an earphone charging case according to claim 8, wherein the earphones (2) are both provided with the light sources (21).

### Claim 18 (depends on 9)

The light guide structure of an earphone charging case according to claim 9, wherein the earphones (2) are both provided with the light sources (21).