# US 10,503,221 B2 · Mobile terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,503,221 B2 - Document ID: US10503221B2 - Status: Granted - Kind: B2 - Application number: 16/055,816 - Filed: 2018-08-06 - Published: 2019-06-27 - Granted: 2019-12-10 - Earliest claimed: 2017-12-22 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Youngdo Cha; Insoo Kim; Dongwon Han - Web page: https://patentgrep.com/patent/US10503221B2 ## CPC - H04M 1/0202: {Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets (constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03)} - G06F 1/203: {for portable computers, e.g. for laptops} - H04M 1/0277: {for a printed circuit board assembly} - H04M 1/0279: {Improving the user comfort or ergonomics} - H04M 1/035: {Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities} - H05K 5/0213: {Venting apertures; Constructional details thereof} - H04M 1/18: Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment (H04M1/19 takes precedence) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A mobile terminal includes a front case accommodating a display on a front surface and having a receiver for outputting a sound, a rear case coupled to one side of the front case, a rear cover covering a rear portion of the rear case to form an appearance and having an air vent hole allowing air to flow in and out to maintain predetermined pressure, and a circuit board installed been the front case and the rear case, wherein an air flow port is formed on an inner side surface of the rear cover and protrudes from the rear cover toward the rear portion of the case to guide movement of air formed by an external force acting on the rear cover. ## Claims ### Claim 1 A mobile terminal comprising: a front case accommodating a display on a front surface and having a receiver for outputting a sound; a rear case coupled to one side of the front case; a rear cover covering a rear portion of the rear case to form an appearance and having an air vent hole allowing air to flow in and out to maintain a predetermined pressure; and a circuit board installed between the front case and the rear case, wherein an air flow port is formed on an inner side surface of the rear cover and protrudes from the rear cover toward the rear portion of the rear case to guide movement of air formed by an external force acting on the rear cover, wherein the air flow port has bent portions having a predetermined curvature on a same plane to reduce a movement speed of air moving toward the receiver, and wherein a plurality of protrusions are formed on an inner surface portion of the air flow port to increase a frictional force with moving air. ### Claim 2 (depends on 1) The mobile terminal of claim 1, wherein the bent portions are formed in a plurality of locations of the air flow port. ### Claim 3 (depends on 1) The mobile terminal of claim 1, wherein the air flow port extends to a position adjacent to the air vent hole. ### Claim 4 (depends on 3) The mobile terminal of claim 3, wherein movement of air is guided along the inside of the air flow port, and the air flow port extends on an inner side surface of the rear cover so as to be radially disposed. ### Claim 5 (depends on 1) The mobile terminal of claim 1, wherein a concavo-convex portion is formed on an inner surface portion of the air flow port to increase a contact area with air. ### Claim 6 (depends on 1) The mobile terminal of claim 1, wherein the air flow port is formed of a flexible material. ### Claim 7 (depends on 1) The mobile terminal of claim 1, wherein the air flow port has a height greater than a space between the rear portion of the rear case and the inner side surface of the rear cover. ### Claim 8 (depends on 7) The mobile terminal of claim 7, wherein the air flow port is disposed to be tightly attached between the rear portion of the rear case and the inner side surface of the rear cover. ### Claim 9 (depends on 8) The mobile terminal of claim 8, wherein the air flow port is formed of a rubber material. ### Claim 10 (depends on 1) The mobile terminal of claim 1, wherein the air flow port is integrally formed with the rear cover. ### Claim 11 (depends on 1) The mobile terminal of claim 1, wherein the air flow port extends from a central portion of the inner side surface of the rear cover toward a corner of the rear cover. ### Claim 12 (depends on 1) The mobile terminal of claim 1, wherein the air moving along the air flow port is discharged to the outside through the air vent hole. ### Claim 13 (depends on 1) The mobile terminal of claim 1, wherein the air flow port is protruded from the inner surface of the rear cover toward the rear portion of the rear case. ### Claim 14 (depends on 13) The mobile terminal of claim 13, wherein the air flow port is formed in an area defined by an inner surface of the rear cover and a rear surface of the rear case. ### Claim 15 (depends on 1) The mobile terminal of claim 1, wherein a movement of air is formed along the air flow port by a force applied to the rear cover. ### Claim 16 (depends on 1) The mobile terminal of claim 1, wherein the air moving along an inside of the air flow port moves toward the receiver in a state where the air is reduced in speed, so that a pressure applied to the receiver is reduced. ### Claim 17 (depends on 1) The mobile terminal of claim 1, wherein the air flow port serves to guide the movement of the air. ### Claim 18 (depends on 1) The mobile terminal of claim 1, wherein the protrusions are formed on an inner surface of the air flow port as well as on an inner surface of the rear cover.