CPC A47C 1/0355 (2013.01) [A47C 1/0352 (2013.01)] | 18 Claims |
1. A mechanical extension apparatus, applied to an extendable seat with a seat, a backrest and a footrest, comprising:
a reclining apparatus comprising multiple links attached to the seat, the backrest and the footrest of the extendable seat, wherein the reclining apparatus is configured to convert the extendable seat between a sitting position, a TV position, and a lying position, and wherein, in the sitting position, the backrest is substantially upright and the footrest is folded below the seat; in the TV position, the backrest is substantially upright and the footrest is substantially horizontally disposed in front of the seat; and in the lying position, an angle between the seat and the backrest is generally larger than the angle between the seat and the backrest in the TV position;
a support assembly, wherein the support assembly support the mechanical extension apparatus directly or indirectly on ground, and the support assembly comprises a gliding support assembly or a rocking support assembly;
a leg extension unit for mounting the footrest, a seat bracket for mounting the seat, and a backrest bracket for mounting the backrest, wherein the leg extension unit, the seat bracket, and the backrest bracket are pivotally connected in sequence;
a pull link, wherein a rear end of the pull link is pivotally connected to the backrest bracket in front of a pivot connection point between the seat bracket and the backrest bracket, a front end of the pull link is pivotally connected to the support assembly; and
an actuator that is attached to the reclining apparatus, wherein the actuator is configured to electronically convert the extendable seat between the sitting position and the TV position; and
wherein the reclining apparatus is configured to convert the extendable seat between the TV position and the lying position by non-electric actuation.
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