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CHAIR HAVING BACKREST WITH AUXILIARY SUPPORT WAIST WHICH IS PROJECTED AND ROTATED IN STATE HAVING ELASTIC FORCE WITHOUT HORIZONTAL GRAVITY BECAUSE OF SPRING ELASTICITY
CHAIR HAVING BACKREST WITH AUXILIARY SUPPORT WAIST WHICH IS PROJECTED AND ROTATED IN STATE HAVING ELASTIC FORCE WITHOUT HORIZONTAL GRAVITY BECAUSE OF SPRING ELASTICITY
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机译:椅子带有辅助支撑腰带的椅背,由于弹簧弹性而在具有弹性力且没有水平重力的状态下投影和旋转
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摘要
PURPOSE: A chair having a backrest with an auxiliary waist support which is projected and rotated in the state having an elastic force without horizontal gravity because of a spring elasticity, is provided to allow a user to conveniently sit on the chair by always supporting his/her waist with aid of the auxiliary waist support. CONSTITUTION: The chair having a backrest with an auxiliary waist support includes: a backrest support(10); an insertion recess(11), arranged in the center of the backrest support(10) to be inserted by a height regulating bar(42) and having a bolt fixture(17); a spring supporting plate(14), arranged in the lower center of the backrest support(10) and supporting a spring holder; a bolt penetration ring(15), arranged respectively on both sides of the spring supporting plate(14); a connection plate(20) of the auxiliary waist support(30); an elastic spring(24), arranged on the outer circumference of a connection tube(22) on the upper portion of the connection plate(20); a spring insertion hole(25), arranged on the connection plate(20); and a swivelling bolt hole(21).
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