# US 9,518,890 B2 · Mobile terminal device and sealing detection method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,890 B2 - Document ID: US9518890B2 - Status: Granted - Kind: B2 - Application number: 14/474,689 - Filed: 2014-09-02 - Published: 2015-03-12 - Granted: 2016-12-13 - Earliest claimed: 2013-09-06 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Yusuke Aotake; Yoshinori Yuki - Web page: https://patentgrep.com/patent/US9518890B2 ## CPC - G01M 3/26: by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors - G08B 21/182: {Level alarms, e.g. alarms responsive to variables exceeding a threshold} - H04B 1/3888: Arrangements for carrying or protecting transceivers - H04M 1/18: Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment (H04M1/19 takes precedence) - G06F 1/1656: {Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories (mounting of accessories to a computer display G06F1/1607; display hoods G06F1/1603; cooling arrangements for portable computers G06F1/203)} - H04B 2001/3894: {Waterproofing of transmission device} - H04M 2250/12: including a sensor for measuring a physical value, e.g. temperature or motion - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS - H04B: TRANSMISSION - 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) ## Abstract A mobile terminal device includes: a housing; a measuring unit configured to measure an air pressure inside the housing; a detecting unit configured to detect whether the housing is sealed based on a change in the air pressure measured by the measuring unit while an operation is being conducted by a user; and a notifying unit configured to notify the user of a detection result of the detecting unit. ## Claims ### Claim 1 A mobile terminal device comprising: an external connector configured to connect to an external device; a housing having an opening that is closeable and openable for access to the external connector; an input device attached to the housing, an operation of the input device changing a volume of space within the housing; a measuring unit configured to measure an air pressure inside the housing; a detecting unit configured to detect the housing being sealed based on an amount of fluctuation of the air pressure measured by the measuring unit remaining larger than a specific value within a certain time period while the input device is being operated; and a notifying unit configured to notify the user of a detection result of the detecting unit. ### Claim 2 (depends on 1) The mobile terminal device according to claim 1, wherein the detecting unit detects that the housing is not sealed when the amount of fluctuation of the air pressure measured within the certain time period is smaller than the specific value. ### Claim 3 (depends on 2) The mobile terminal device according to claim 2, wherein the amount of fluctuation of the air pressure measured by the measuring unit in a state in which an openable and closeable lid member provided on the housing is not sealed is set as the specific value. ### Claim 4 (depends on 1) The mobile terminal device according to claim 1, wherein the measuring unit starts measuring the air pressure inside the housing when an operation by the user is detected. ### Claim 5 A mobile terminal device, comprising: a housing; a measuring unit configured to measure an air pressure inside the housing; a detecting unit configured to detect whether the housing is sealed based on a change in the air pressure measured by the measuring unit while an operation is being conducted by a user; and a notifying unit configured to notify the user of a detection result of the detecting unit, wherein the measuring unit does not measure the air pressure inside the housing when a function to be used when an openable and closeable lid member provided on the housing is open is being operated, and measures the air pressure inside the housing when a function to be used when the openable and closeable lid member provided on the housing is open is not being operated. ### Claim 6 A non-transitory computer-readable recording medium storing a program that cases a computer to execute a procedure, the procedure comprising: measuring an air pressure inside a housing having an opening that is openable and closeable for access to an external connector configured to connect to an external device, and the housing having an input device attached that changes a volume of space within the housing when the input device is operated; detecting the housing is sealed based on an amount of fluctuation of the measured air pressure remaining larger than a specific value within a certain time period while the input device is being operated; and notifying the user of a result of the detecting. ### Claim 7 A sealing detection method comprising: measuring an air pressure inside a housing of a mobile terminal device, the housing having an opening that is openable and closeable for access to an external connector configured to connect to an external device, and the housing having an input device attached that changes a volume of space within the housing when the input device is operated; detecting the housing is sealed based on an amount of fluctuation of the measured air pressure remaining larger than a specific value within a certain time period while the input device is being operated; and notifying the user of a result of the detecting.