Chair

Abstract

A chair includes a seat assembly, a backrest assembly, a support assembly, and an actuating mechanism. The seat assembly includes a leg unit and a seat plate mounted to the leg unit. The backrest assembly includes a backrest plate and an engaging frame interconnecting pivotally the backrest plate and the seat assembly. The support assembly includes at least one telescopic rod interconnecting the engaging frame and the leg unit. The actuating mechanism includes at least one actuating member corresponding in position to the telescopic rod, and a drawing unit coupled to the actuating member and operable for driving the actuating member to actuate length adjustment of the telescopic rod so as to adjust inclination of the backrest assembly relative to the seat assembly.

1 . A chair comprising:
 a seat assembly including a leg unit and a seat plate that is mounted to said leg unit;   a backrest assembly including a backrest plate and an engaging frame that interconnects pivotally said backrest plate and said seat assembly;   support assembly including at least one telescopic rod that interconnects said engaging frame of said backrest assembly and said leg unit of said seat assembly; and   an actuating mechanism including
 at least one actuating member that corresponds in position to said at least one telescopic rod, and 
 a drawing unit that is coupled to said actuating member and that is operable for driving said actuating member to actuate length adjustment of said telescopic rod so as to adjust inclination of said backrest assembly relative to said seat assembly. 
   
     
     
         2 . The chair as claimed in  claim 1 , wherein:
 said actuating mechanism further includes a handling device that is mounted to said seat assembly; and   said drawing unit includes a drawing strip that has an end co-movable with said actuating member and an opposite end connected to said handling device, such that said handling device is operable to move said actuating member through said drawing strip.   
     
     
         3 . The chair as claimed in  claim 2 , wherein said telescopic rod is provided with a protruding plate disposed adjacent to said actuating member and a trigger member operable to enable the length adjustment of said telescopic rod, said actuating member having a spring-abutting portion that corresponds in position to said protruding plate and a controlling portion that corresponds in position to said trigger member, said actuating mechanism further including a spring that has opposite ends abutting respectively against said spring-abutting portion of said actuating member and said protruding plate. 
     
     
         4 . The chair as claimed in  claim 3 , wherein said support assembly further includes:
 a first positioning seat mounted to a bottom surface of said seat plate and spaced apart from said engaging frame of said backrest assembly;   a first pivot rod for coupling pivotally said first positioning seat to said telescopic rod;   a second positioning seat mounted to said engaging frame; and   a second pivot rod for coupling pivotally said second positioning seat to said telescopic rod.   
     
     
         5 . The chair as claimed in  claim 1 , wherein:
 said support assembly includes two of said telescopic rods that are spaced apart from each other;   said actuating mechanism further includes
 two of said actuating members that correspond in position to said telescopic rods, respectively, 
 a coupling rod that is connected co-movably to said actuating members, and 
 a handling device that is mounted to said seat assembly; and 
   said drawing unit includes a connecting member that is coupled to said coupling rod, and a drawing strip that has an end connected to said connecting member and an opposite end connected to said handling device, such that said handling device is operable to move said coupling rod and said actuating members through said drawing strip.   
     
     
         6 . The chair as claimed in  claim 5 , wherein:
 said actuating mechanism further includes a supporting frame secured to said telescopic rods; and   said drawing unit further includes a bushing sleeved on said drawing strip and mounted to said supporting frame.   
     
     
         7 . The chair as claimed in  claim 5 , wherein each of said telescopic rods is provided with a trigger member operable to enable the length adjustment of corresponding one of said telescopic rods and a protruding plate disposed adjacent to a respective one of said actuating members, each of said actuating members having a spring-abutting portion that corresponds in position to said protruding plate of the respective one of telescopic rods and a controlling portion that corresponds in position to said trigger member of the respective one of said telescopic rods, said actuating mechanism further including two springs each having opposite ends abutting respectively against said spring-abutting portion of a respective one of said actuating members and said protruding plate of a corresponding one of said telescopic rods. 
     
     
         8 . The chair as claimed in  claim 7 , wherein said support assembly further includes:
 a first positioning seat mounted to a bottom surface of said seat plate and spaced apart from said engaging frame of said backrest assembly;   a first pivot rod for coupling pivotally said first positioning seat to said telescopic rods;   a second positioning seat mounted to said engaging frame; and   a second pivot rod for coupling pivotally said second positioning seat to said telescopic rods.   
     
     
         9 . The chair as claimed in  claim 1 , wherein said support assembly includes two of said telescopic rods that are spaced apart from each other, said actuating mechanism further including two of said actuating members that correspond respectively in position to said telescopic rods, and a handling device that is mounted to said seat assembly, said drawing unit including two drawing strips, each of which has an end connected to said handling device and an opposite end connected to a respective one of said actuating members, such that said handling device is operable to move said actuating members through said drawing strip. 
     
     
         10 . The chair as claimed in  claim 9 , wherein each of said telescopic rods is provided with a trigger member operable to enable the length adjustment of a respective one of said telescopic rods and a protruding plate disposed adjacent to a respective one of said actuating members, each of said actuating members having a spring-abutting portion that corresponds in position to said protruding plate of the respective one of telescopic rods, and a controlling portion that corresponds in position to said trigger member of the respective one of said telescopic rods, said actuating mechanism further including two springs each having opposite ends abutting respectively against said spring-abutting portion of a respective one of said actuating members and said protruding plate of corresponding one of said telescopic rods. 
     
     
         11 . The chair as claimed in  claim 10 , wherein said support assembly further includes:
 a first positioning seat mounted to a bottom surface of said seat plate and spaced apart from said engaging frame of said backrest assembly;   a first pivot rod for coupling pivotally said first positioning seat to said telescopic rods;   a second positioning seat mounted to said engaging frame; and   a second pivot rod for coupling pivotally said second positioning seat to said telescopic rods.