US 11,918,326 B2
Blood pressure meter
Toshiaki Koga, Kyoto (JP); Toshihiko Ogura, Kyoto (JP); Jun Yamagishi, Kyoto (JP); and Takuya Nagata, Kyoto (JP)
Assigned to OMRON HEALTHCARE CO., LTD., Muko (JP)
Filed by OMRON HEALTHCARE CO., LTD., Muko (JP)
Filed on Sep. 30, 2020, as Appl. No. 17/039,361.
Application 17/039,361 is a continuation of application No. PCT/JP2019/007721, filed on Feb. 28, 2019.
Claims priority of application No. 2018-081749 (JP), filed on Apr. 20, 2018.
Prior Publication US 2021/0007616 A1, Jan. 14, 2021
Int. Cl. A61B 5/021 (2006.01); A61B 5/00 (2006.01); A61B 5/022 (2006.01)
CPC A61B 5/02141 (2013.01) [A61B 5/022 (2013.01); A61B 5/6824 (2013.01); A61B 2562/0219 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A sphygmomanometer comprising:
a main body; and
a cuff having a cylindrical shape, rotatably attached to the main body about a rotating shaft horizontal to the main body, and configured to receive an upper arm of a subject when the upper arm is inserted therein,
wherein the cuff has a fluid bag configured to compress the upper arm of the subject along an inner circumferential surface of the cuff, and is attached to the rotating shaft on a rear surface side opposite to a front surface side arranged facing the subject during blood pressure measurement, in a direction in which a central axis of the cuff extends, and
wherein the sphygmomanometer further comprises a swing mechanism configured to maintain, in a standby state of the upper arm not being inserted into the cuff, a tilt angle of the central axis of the cuff with respect to a horizontal plane at a standby angle at which the front surface side is higher than the rear surface side, and by the upper arm being inserted into the cuff, allow the tilt angle of the central axis of the cuff with respect to the horizontal plane to become either larger or smaller than the standby angle, and
wherein the swing mechanism includes:
a first coil spring erected at a position in the main body facing a first portion on the front surface side of the cuff; and
a second coil spring erected at a position in the main body facing a second portion between the first portion and the rotating shaft in a front-back direction,
wherein the first coil spring has a length in a natural state longer than a length of the second coil spring in the natural state, and the first coil spring has a spring constant set smaller than a spring constant of the second coil spring, and
wherein, in the standby state, by the first portion of the cuff compressing the first coil spring from the natural length by a weight of the cuff and the second portion of the cuff abutting on an upper end of the second coil spring, the tilt angle of the central axis of the cuff with respect to the horizontal plane is maintained at the standby angle.