# US 2021/0279435 A1 · Radio tag reading device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0279435 A1 - Document ID: US20210279435A1 - Status: Published application - Kind: A1 - Application number: 17/082,049 - Filed: 2020-10-28 - Published: 2021-09-09 - Earliest claimed: 2020-03-09 - Assignees: Toshiba Tec Kabushiki Kaisha - Applicants: Toshiba Tec Kabushiki Kaisha - Inventors: Wataru Sakurai; Nobuo Murofushi; Yuichiro Kawabe; Yuki Suzuki; Shigeaki Suzuki - Web page: https://patentgrep.com/patent/US20210279435A1 ## CPC - G06K 7/10: by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation - G06K 7/10386: {the interrogation device being of the portable or hand-handheld type, e.g. incorporated in ubiquitous hand-held devices such as PDA or mobile phone, or in the form of a portable dedicated RFID reader} - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS ## Abstract According to one embodiment, a radio tag reading device includes: a body portion including a radio tag reading unit that reads a radio tag; a grip portion detachably connected to the body portion; a magnet provided in the grip portion; a magnet detection unit provided in the body portion and configured to detect magnetism generated by the magnet; a state detection unit configured to detect a state of the grip portion based on the magnetism detected by the magnet detection unit; and a reading control unit configured to control the radio tag reading unit. ## Claims ### Claim 1 A radio tag reading device comprising: a body portion including a radio tag reader that reads a radio tag; a grip portion detachably connected to the body portion; a magnet provided in the grip portion; and a magnet detector provided in the body portion and configured to detect magnetism generated by the magnet. ### Claim 2 (depends on 1) The device according to claim 1, further comprising: an operation component provided in the grip portion and configured to operate reading of the radio tag; a state detector configured to detect a state of the grip portion based on the magnetism detected by the magnet detector; and a reading controller configured to control the radio tag reading unit, wherein the magnet moves in conjunction with an operation of the operation component and a distance between the magnet and the magnetic detector changes according to the operation of the operation unit, and the reading controller controls the radio tag reader according to the state of the grip portion detected by the state detector. ### Claim 3 (depends on 2) The device according to claim 2, wherein the reading controller radiates a radio wave and allows the radio tag reader to read the radio tag when the state of the grip portion detected by the state detector is a state in which a distance between the magnet and the magnetic detector is smaller than a first distance threshold, and the reading control unit stops the radiation of the radio wave and allow the radio tag reader not to be able to read the radio tag when the state of the grip portion is a state in which the distance between the magnet and the magnetic detector is larger than a second distance threshold. ### Claim 4 (depends on 2) The device according to claim 2, wherein, based on the magnetism detected by the magnetic detector, the state detector detects whether the state of the grip portion is a connection state in which the grip portion is connected to the body portion or a non-connection state in which the grip portion is not connected to the body portion. ### Claim 5 (depends on 4) The device according to claim 4, wherein the body portion further includes a temperature detector configured to detect a temperature of the body portion, and the reading controller controls an operation of the radio tag reader based on a temperature detected by the temperature detector and changes a control method for the operation of the radio tag reader between a case in which the state of the grip portion is the connection state and a case in which the state of the grip portion is the non-connection state. ### Claim 6 (depends on 4) The device according to claim 4, wherein the magnetic detector detects magnetism as a magnetic flux density, the state detector detects that the state of the grip portion is the non-connection state when the magnetic flux density is less than a first threshold, the state detector detects that the state of the grip portion is a state in which the distance between the magnet and the magnetic detector is distant when the magnetic flux density is equal to or greater than the first threshold and equal to or less than a second threshold, and the state detector detects that the state of the grip portion is a state in which the distance between the magnet and the magnetic detector is close when the magnetic flux density is greater than the second threshold. ### Claim 7 (depends on 1) The device according to claim 1, further comprising: a joining portion that joins the body portion with the grip portion when the body portion is connected to the grip portion. ### Claim 8 (depends on 1) The device according to claim 1, further comprising: a display that displays information. ### Claim 9 (depends on 1) The device according to claim 1, further comprising: a trigger switch that changes a state of the grip portion to a state in which a distance between the magnet and the magnetic detector is lower than a first distance threshold or a state in which the distance between the magnet and the magnetic detector is larger than a second distance threshold when the body portion is connected to the grip portion. ### Claim 10 (depends on 1) The device according to claim 1, further comprising: a memory that stores a state determination table in which states of a magnetic flux density detected by the magnetic detector are associated with states of the grip portion. ### Claim 11 A hand-held radio tag reading device comprising: a body portion including a radio tag reader that reads a radio tag; a grip portion detachably connected to the body portion; a magnet provided in the grip portion; and a magnet detector provided in the body portion and configured to detect magnetism generated by the magnet. ### Claim 12 (depends on 11) The hand-held device according to claim 11, further comprising: an operation component provided in the grip portion and configured to operate reading of the radio tag; a state detector configured to detect a state of the grip portion based on the magnetism detected by the magnet detector; and a reading controller configured to control the radio tag reading unit, wherein the magnet moves in conjunction with an operation of the operation component and a distance between the magnet and the magnetic detector changes according to the operation of the operation unit, and the reading controller controls the radio tag reader according to the state of the grip portion detected by the state detector. ### Claim 13 (depends on 12) The hand-held device according to claim 12, wherein the reading controller radiates a radio wave and allows the radio tag reader to read the radio tag when the state of the grip portion detected by the state detector is a state in which a distance between the magnet and the magnetic detector is smaller than a first distance threshold, and the reading control unit stops the radiation of the radio wave and allow the radio tag reader not to be able to read the radio tag when the state of the grip portion is a state in which the distance between the magnet and the magnetic detector is larger than a second distance threshold. ### Claim 14 (depends on 12) The hand-held device according to claim 12, wherein, based on the magnetism detected by the magnetic detector, the state detector detects whether the state of the grip portion is a connection state in which the grip portion is connected to the body portion or a non-connection state in which the grip portion is not connected to the body portion. ### Claim 15 (depends on 14) The hand-held device according to claim 14, wherein the body portion further includes a temperature detector configured to detect a temperature of the body portion, and the reading controller controls an operation of the radio tag reader based on a temperature detected by the temperature detector and changes a control method for the operation of the radio tag reader between a case in which the state of the grip portion is the connection state and a case in which the state of the grip portion is the non-connection state. ### Claim 16 (depends on 14) The hand-held device according to claim 14, wherein the magnetic detector detects magnetism as a magnetic flux density, the state detector detects that the state of the grip portion is the non-connection state when the magnetic flux density is less than a first threshold, the state detector detects that the state of the grip portion is a state in which the distance between the magnet and the magnetic detector is distant when the magnetic flux density is equal to or greater than the first threshold and equal to or less than a second threshold, and the state detector detects that the state of the grip portion is a state in which the distance between the magnet and the magnetic detector is close when the magnetic flux density is greater than the second threshold. ### Claim 17 (depends on 11) The hand-held device according to claim 11, further comprising: a joining portion that joins the body portion with the grip portion when the body portion is connected to the grip portion. ### Claim 18 (depends on 11) The hand-held device according to claim 11, further comprising: a display that displays information. ### Claim 19 (depends on 11) The hand-held device according to claim 11, further comprising: a trigger switch that changes a state of the grip portion to a state in which a distance between the magnet and the magnetic detector is lower than a first distance threshold or a state in which the distance between the magnet and the magnetic detector is larger than a second distance threshold when the body portion is connected to the grip portion. ### Claim 20 (depends on 11) The hand-held device according to claim 11, further comprising: a memory that stores a state determination table in which states of a magnetic flux density detected by the magnetic detector are associated with states of the grip portion.