US 12,285,372 B2
Control device and bed device
Toshiki Matsubayashi, Tokyo (JP); and Masato Shimokawa, Tokyo (JP)
Assigned to PARAMOUNT BED CO., LTD., Tokyo (JP)
Appl. No. 17/272,851
Filed by PARAMOUNT BED CO., LTD., Tokyo (JP)
PCT Filed Aug. 1, 2019, PCT No. PCT/JP2019/030307
§ 371(c)(1), (2) Date Mar. 2, 2021,
PCT Pub. No. WO2020/217557, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-080869 (JP), filed on Apr. 22, 2019.
Prior Publication US 2021/0315755 A1, Oct. 14, 2021
Int. Cl. A61G 7/018 (2006.01); A61G 7/015 (2006.01); G05B 19/042 (2006.01)
CPC A61G 7/018 (2013.01) [A61G 7/015 (2013.01); G05B 19/042 (2013.01); A61G 2203/16 (2013.01); G05B 2219/2608 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A control device of a bed device comprising:
a controller comprising a circuit configured to control a first speed of an extension/contraction of a first actuator that controls a first movable part of the bed device and a second speed of an extension/contraction of a second actuator that controls a second movable part of the bed device, based on a first changing amount of extension/contraction of the first actuator and a second changing amount of extension/contraction of the second actuator, so as to maintain a surface of the bed device in a horizontal state when the controller is configured to control the first actuator and the second actuator to lift or lower the surface of the bed device,
wherein
each of the first and second actuators includes an extendable rod and a drive source connected to the extendable rod respectively,
a difference between a maximum length and a minimum length of the extendable rod of the first actuator is different from a difference between a maximum length and a minimum length of the extendable rod of the second actuator,
the circuit of the controller controls the first and second actuators so that a speed of a motion of the first movable part and a speed of a motion of the second movable part are substantially identical, thereby maintaining the surface of the bed device in the horizontal state during operation of the first and second actuators, and
one of the first actuator and the second actuator has different speed from the other in changing amount of extension/contraction of actuators.