Angular Position Adjusting Device for a Chair Armrest

An angular position adjusting device for a chair armrest, comprising:

• a coupling column including a lower end configured to couple with a chair body, wherein the coupling column includes a top end having a lower coupling face, wherein the lower coupling face includes a receiving groove, a pivotal groove, and at least one restraining groove, and wherein the pivotal groove includes a bottom wall having a coupling hole;
• a positioning block made of an elastic material, wherein the positioning block is mounted in the receiving groove and includes a resilient portion which is flexible in a vertical direction, and wherein the resilient portion includes a positioning member protruding upwards therefrom;
• and
• a supporting pad including a seat having a lower end with an upper coupling face corresponding to the lower coupling face of the coupling column, wherein an axle is disposed on the upper coupling face, is received in the pivotal groove, and includes a coupling hole in a central portion thereof, wherein a fastener extends through the coupling hole of the supporting pad and is coupled with the coupling hole of the coupling column, wherein the upper coupling face further includes a plurality of positioning grooves spaced from each other in an angular direction, wherein the positioning member is selectively and releasably engaged in one of the plurality of positioning grooves, and wherein at least one restraining member is disposed on the upper coupling face and is slidably received in the at least one restraining groove.