Standing-up assistance chair

Abstract

A reclining chair includes a base, a seat, a linkage assembly, and a seat adjustment unit. The linkage assembly includes a first link, a buffer rod, and a support rod. The first link is pivotally connected to the base and the seat, the buffer rod is pivotally connected to the first link, and the support rod is pivotally connected to the buffer rod and the seat, forming a quadrilateral linkage mechanism. The seat adjustment unit is pivotally connected to the base and the buffer rod. When activated, it causes the buffer rod to swing, actuating the quadrilateral linkage mechanism and tilting the seat relative to the base. The reclining chair also includes a backrest and a backrest adjustment unit. The backrest adjustment unit is pivotally connected to a backrest frame and the buffer rod to adjust the tilt angle of the backrest frame relative to the seat as the buffer rod swings, thereby assisting the user in rising from a seated position.

Claims

1. A reclining chair, comprising: a base; a seat; a linkage assembly comprising: a first link pivotally connected to the base and the seat; a buffer rod pivotally connected to the first link; and a support rod pivotally connected to the buffer rod and the seat, such that the seat, the first link, the buffer rod, and the support rod together form a quadrilateral linkage mechanism; and a seat adjustment unit pivotally connected to the base and the buffer rod, wherein when the seat adjustment unit is activated, it drives the buffer rod to swing, causing the quadrilateral linkage mechanism to operate with the swing of the buffer rod, thereby causing the seat to tilt relative to the base.

2. The reclining chair as described in claim 1, wherein, The chair also includes a backrest and a backrest adjustment unit. The backrest is pivotally connected to the seat, and the backrest adjustment unit is pivotally connected to the backrest and the buffer bar. The backrest adjustment unit adjusts the tilt angle of the backrest relative to the seat as the buffer bar swings.

3. A reclining chair, comprising: a base; a seat; a backrest pivotally connected to the seat; a linkage assembly comprising: a first link pivotally connected to the base and the seat; a buffer rod pivotally connected to the first link; and a support rod pivotally connected to the buffer rod and the seat, such that the seat, the first link, the buffer rod, and the support rod together form a quadrilateral linkage mechanism; a seat adjustment unit pivotally connected to the base and the linkage assembly, wherein when the seat adjustment unit is actuated, it drives the linkage assembly to actuate, thereby tilting the seat relative to the base; and a backrest adjustment unit pivotally connected to the backrest and the buffer rod, wherein the backrest adjustment unit adjusts the tilt angle of the backrest relative to the seat as the buffer rod swings.

4. A standing chair as described in claim 2 or 3, wherein, The back adjustment unit includes a back telescopic member with two opposing ends, which are respectively pivotally connected to the back and the buffer rod. When the back telescopic member extends or retracts, it adjusts the tilt angle of the back relative to the seat. The back telescopic member includes a back telescopic rod and a back actuator. The back telescopic rod is connected to the back actuator and extends or retracts relative to the back actuator.

5. A standing chair as described in claim 2 or 3, wherein, The pivot joint between the support rod and the buffer rod is located in front of the pivot joint between the back adjustment unit and the buffer rod, and the pivot joint between the seat adjustment unit and the buffer rod is located below the pivot joint between the support rod and the buffer rod and the pivot joint between the back adjustment unit and the buffer rod.

6. A standing chair as described in any one of claims 1 to 3, wherein, The linkage assembly also includes a second link, which is pivotally connected to the base and the seat portion, and the second link is located in front of the first link, such that when the seat portion is moved away from and tilted relative to the base, the front side of the seat portion is lower than the rear side.

7. The reclining chair as described in claim 6, wherein, The pivot point between the first link and the seat and the pivot point between the second link and the seat define a first distance, and the pivot point between the first link and the base and the pivot point between the second link and the base define a second distance. The second distance is greater than the first distance, and the length of the second link is less than the length of the first link.

8. A standing chair as described in any one of claims 1 to 3, wherein, The seat adjustment unit includes a seat telescopic member with two opposite ends, which are respectively pivotally connected to the base and the buffer rod. When the seat telescopic member extends or retracts, it causes the buffer rod to swing. The seat telescopic member includes a seat telescopic rod and a seat actuator. The seat telescopic rod is connected to the seat actuator and extends or retracts relative to the seat actuator.

9. A standing chair as described in any one of claims 1 to 3, wherein, The buffer rod is located between the base and the seat, and the pivot point of the buffer rod and the first connecting rod is located between the pivot point of the first connecting rod and the base and the pivot point of the first connecting rod and the seat.

10. A standing chair as described in any one of claims 1 to 3, wherein, The pivot joint between the support rod and the buffer rod is located in front of the pivot joint between the seat adjustment unit and the buffer rod.

Images