Chair unit and furniture assembly with floor-standing armrests

Abstract

A chair unit with floor-standing armrests includes: a base unit; a seat unit pivotally connected to the base unit, the seat unit including a seat frame configured to attach a seat cushion; a leg unit, including a leg frame and a pair of leg sliders movable along the front-to-rear direction of the chair unit, in which the leg frame includes at least a pair of leg longitudinal beams extended longitudinally along the front-to-rear direction of the chair unit and a leg crossbeam extended transversely between the leg longitudinal beams, and the leg frame is connected to a bottom side of the seat frame; and an actuating unit, including a leg actuator, in which each of the leg longitudinal beams has a guide rail with an opening facing outwards along a lateral side of the chair unit, the respective leg slider is slidably supported in the respective guide rail.

1 . A chair unit with floor-standing armrests, comprising:
 a base unit;   a seat unit pivotally connected to the base unit, the seat unit comprising a seat frame configured to attach a seat cushion;   a leg unit, comprising a leg frame and a pair of leg sliders movable along a front-to-rear direction of the chair unit, wherein the leg frame at least comprises a pair of leg longitudinal beams extended longitudinally along the front-to-rear direction of the chair unit and a leg crossbeam extended transversely between the leg longitudinal beams, and the leg frame is connected to a bottom side of the seat frame; and   an actuating unit, at least comprising a leg actuator,   wherein each of the leg longitudinal beams has a guide rail with an opening facing outwards along a lateral side of the chair unit, the respective leg slider is slidably supported in the respective guide rail, so that the leg unit is capable of being switched between a retracted position and a stretched position by means of an adjustment of the leg actuator, the respective leg slider is retracted back into the respective leg longitudinal beam when in the retracted position, and the respective leg slider is stretched forward from the respective leg longitudinal beam when in the stretched position.   
     
     
         2 . The chair unit according to  claim 1 , wherein the leg slider comprises a slider, and the slider is shaped to fit into the guide rail, so that the leg slider is slidably supported in the guide rail. 
     
     
         3 . The chair unit according to  claim 1 , wherein the leg actuator acts between the leg frame and the leg slider, the leg unit further comprises a guide crossbeam extended transversely between the pair of the leg sliders, an end of the leg actuator is connected to the leg crossbeam, and an opposite end of the leg actuator is arranged on a top side of the guide crossbeam. 
     
     
         4 . The chair unit according to  claim 1 , wherein the leg longitudinal beam comprises at least one mounting tab, and the leg frame is connected to a bottom side of the seat frame by means of the mounting tab, a mounting plane is defined by the mounting tab, and the guide rail is extended obliquely with respect to the mounting plane. 
     
     
         5 . The chair unit according to  claim 1 , wherein a front end of the leg slider is attached to a footrest plate, the footrest plate is folded at a front end of the leg longitudinal beam in the retracted position, and the footrest plate is unfolded forward with respect to the leg longitudinal beam. 
     
     
         6 . The chair unit according to  claim 5 , wherein the leg unit further comprises a footrest link, the footrest link is pivoted at a front end of the leg slider, and the footrest link is fixedly connected to the footrest plate, so that the footrest plate is pivotally connected to the leg slider by means of the footrest link. 
     
     
         7 . The chair unit according to  claim 6 , wherein the leg unit further comprises a reset member, and an end of the footrest link distal to the leg slider is capable of being flipped forward by means of the reset member. 
     
     
         8 . The chair unit according to  claim 7 , wherein, in a process of the leg unit being switched from the retracted position to the stretched position, the leg slider slides forward along the guide rail, and the reset member causes the footrest link to be flipped forward together with the footrest plate. 
     
     
         9 . The chair unit according to  claim 7 , wherein, in a process of the leg unit being switched from the stretched position to the retracted position, the leg slider slides backward along a leg guide part of the leg longitudinal beam, so that the footrest plate is stopped by the front end of the leg longitudinal beam or the front end of the seat unit of the chair unit and overcomes a reset force of the reset member to be flipped backward. 
     
     
         10 . The chair unit according to  claim 7 , wherein the reset member comprises a torsion spring acting between the leg slider and the footrest link. 
     
     
         11 . The chair unit according to  claim 7 , wherein the reset member comprises a stretching member acting between the seat frame and the footrest plate, the stretching member comprises a tension spring or a cover that encloses the seat frame and the footrest plate. 
     
     
         12 . The chair unit according to  claim 1 , wherein the base unit comprises a pair of fixing plates extended along the front-to-rear direction of the chair unit, and a rear-base crossbeam fixedly connected to the pair of fixing plates and extended transversely between the pair of fixing plates. 
     
     
         13 . The chair unit according to  claim 12 , wherein the base unit further comprises a front-base crossbeam fixedly connected to the pair of fixing plates and extended transversely between the pair of fixing plates. 
     
     
         14 . The chair unit according to  claim 12 , wherein the seat unit comprises a pair of seat support assembly movable along the front-to-rear direction of the chair unit with respect to the base unit, so as to achieve a switching of the seat unit between a reclined position and a vertical position, the seat support assembly comprises an upper seat longitudinal beam and a lower seat longitudinal beam both extended along the front-to-rear direction of the chair unit, and the seat cushion is connected to the upper seat longitudinal beam by means of the seat frame. 
     
     
         15 . The chair unit according to  claim 14 , wherein an angle between the seat frame and a horizontal plane is in a range of 6° to 12° when the seat unit is in the vertical direction, and the angle between the seat frame and a horizontal plane is in a range of 16° to 28° when the seat unit is in the reclined direction. 
     
     
         16 . The chair unit according to  claim 14 , wherein the seat support assembly further comprises a front seat link and a rear seat link both fixedly connected between the upper seat longitudinal beam and the lower seat longitudinal beam. 
     
     
         17 . The chair unit according to  claim 14 , further comprising a backrest unit, configured to attach a backrest, wherein the backrest unit is connected to a rear part of the upper seat longitudinal beam, the backrest unit comprises a backrest support configured to attach the backrest, and the backrest support is pivotally connected to the upper seat longitudinal beam, so as to achieve a rotation of the backrest support with the switching of the seat unit between the reclined position and the vertical direction. 
     
     
         18 . The chair unit according to  claim 17 , wherein the backrest unit further comprises a first backrest link and a second backrest link, the first backrest link is connected between the backrest support and the second backrest link, and the second backrest link is pivotally connected to the first backrest link, the upper seat longitudinal beam, and the base unit respectively, so that a highest point of the backrest support moves forward when the upper seat longitudinal beam moves forward. 
     
     
         19 . The chair unit according to  claim 14 , wherein the actuating unit further comprises a seat actuator acting between the leg crossbeam and a rear base crossbeam, and a movement of the seat support assembly along the front-to-rear direction of the chair unit is achieved by means of an adjustment of the seat actuator. 
     
     
         20 . A furniture assembly, comprising a pair of armrests fixedly supported on the ground, a seat cushion movable with respect to the armrests, a backrest movable with respect to the armrests, a footrest extendable with respect to the armrests, and a chair unit, wherein the chair unit comprises:
 a base unit;   a seat unit pivotally connected to the base unit, the seat unit comprising a seat frame configured to attach a seat cushion;   a leg unit, comprising a leg frame and a pair of leg sliders movable along the front-to-rear direction of the chair unit, wherein the leg frame at least comprises a pair of leg longitudinal beams extended longitudinally along a front-to-rear direction of the chair unit and a leg crossbeam extended transversely between the leg longitudinal beams, and the leg frame is connected to a bottom side of the seat frame; and   an actuating unit, at least comprising a leg actuator,   wherein each of the leg longitudinal beams has a guide rail with an opening facing outwards along a lateral side of the chair unit, the respective leg slider is slidably supported in the respective guide rail, so that the leg unit is capable of being switched between a retracted position and a stretched position by means of an adjustment of the leg actuator, the respective leg slider is retracted back into the respective leg longitudinal beam when in the retracted position, and the respective leg slider is stretched forward from the respective leg longitudinal beam when in the stretched position.