US 11,701,200 B2
Wireless IC tag-attached metal medical instrument
Hiromi Murayama, Nagaokakyo (JP); Kengo Matsumoto, Nagaokakyo (JP); Tsuyoshi Suesada, Nagaokakyo (JP); and Makoto Yasutake, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Dec. 14, 2021, as Appl. No. 17/550,569.
Application 17/550,569 is a continuation of application No. PCT/JP2020/032275, filed on Aug. 27, 2020.
Claims priority of application No. 2019-191273 (JP), filed on Oct. 18, 2019.
Prior Publication US 2022/0096202 A1, Mar. 31, 2022
Int. Cl. A61B 90/98 (2016.01); G06K 7/10 (2006.01); G06K 19/07 (2006.01); G06K 19/077 (2006.01); H01F 27/06 (2006.01); H01Q 1/22 (2006.01)
CPC A61B 90/98 (2016.02) [G06K 7/10366 (2013.01); G06K 19/0723 (2013.01); G06K 19/07758 (2013.01); H01F 27/06 (2013.01); H01Q 1/2225 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wireless IC tag-attached metal medical instrument comprising:
a wireless IC tag including a resonant circuit having an inductor, and a wireless IC chip, with the resonant circuit being electrically connected to the wireless IC chip and having a predetermined resonant frequency; and
a metal medical instrument that includes:
a first body that is metal and has a first end and a second end;
a second body part that is metal and has a third end and a fourth end;
a support portion having a central axis that extends in an up-down direction and that supports the first body and the second body, such that a distance between the first end and the third end and a distance between the second end and the fourth end change as the first body rotates about the central axis relative to the second body, with the support portion also supporting the first body and the second body, such that the first body and the second body extend in a front-back direction when the first end is closest to the third end;
a first ring connected to the first end of the first body; and
a second ring connected to the third end of the second body,
wherein electric field coupling, magnetic field coupling, or electromagnetic field coupling is established between the resonant circuit and the metal medical instrument, such that the metal medical instrument is configured to emit a transmission signal or receive a reception signal when the wireless IC tag is fixed to the first body or the second body with at least a part of the wireless IC tag being positioned more frontward than a front end of the first ring and a front end of the second ring and more backward than the support portion when the first end is closest to the third end, and
wherein a winding axis of the inductor is orthogonal to the up-down direction and intersects the front-back direction when the first end is closest to the third end.