US 12,453,425 B2
Low-profile electric bed
Chuan-Hang Shih, Lukang Township (TW); and Yu-Chi Yang, Lukang Township (TW)
Assigned to Chuan-Hang Shih, Lukang Township, Changhua County (TW)
Filed by Chuan-Hang Shih, Lukang Township, Changhua County (TW)
Filed on Mar. 7, 2024, as Appl. No. 18/598,562.
Prior Publication US 2025/0280965 A1, Sep. 11, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. A47C 20/10 (2006.01)
CPC A47C 20/10 (2013.01) 5 Claims
OG exemplary drawing
 
1. A low-profile electric bed, comprising:
a stationary frame having two slide rails;
an upper frame having a side pivotally connected with the stationary frame;
a push frame comprising a swivel rack and two moving arms; wherein the swivel rack includes a connecting rod and two support arms disposed with two ends of the connecting rod; wherein each of the two support arms is pivotally connected with the upper frame via a first pivot, pivotally connected with one of the two moving arms via a second pivot, and pivotally connected with a push wheel via a third pivot in a way that the third pivot is located between the first pivot and the second pivot, and the first, second and third pivots are located at three vertices of a triangle respectively; wherein each of the two support arms has a stopping portion configured in a way that when each of the two moving arms is rotated relative to associated one of the two support arms at a predetermined angle, the each of the two moving arms is stopped at the stopping portion of the associated one of the two support arms to prevent the each of the two moving arms from further rotation; wherein each of the two moving arms is pivotally connected with a roller via a fourth pivot; and
an actuator having two ends pivotally and respectively connected with the stationary frame and the swivel rack in a way that when the actuator gradually extends at a first stage, the two push wheels are in contact with the two slide rails respectively, causing the swivel rack to swing about the third pivot and to drive the upper frame to upward swing relative to the stationary frame, and when the actuator further extends at a second stage, the two moving arms are respectively engaged with the two stopping portions, causing that the two rollers are in contact with the two slide rails respectively, and the swivel rack and the two moving arms collectively swing about the fourth pivot in a way that the two push wheels are disengaged from the two slide rails, and the swivel rack and the two moving arms collectively drive the upper frame to upward further swing relative to the stationary frame.