Chair backrest mounting bracket

A chair backrest mounting bracket, comprising:

• a middle fixing section made of a material with high rigidity and having an axially extended and internally threaded central mounting hole;
• the middle fixing section being connectable to a predetermined position on a backrest support of a chair by threading a middle bolt through the backrest support into the internally threaded central mounting hole;
• a plurality of side fixing sections made of a material with high rigidity and located outside the middle fixing section;
• each of the side fixing sections having a centered and axially extended side mounting hole, through which a side fastening element may be extended into a predetermined position on a backrest of the chair;
• and
• an elastic connecting section made of a flexible and deformable material and located between the middle fixing section and each of the side fixing sections, allowing the chair backrest to be elastically connected to the backrest support via the side fixing sections and the middle fixing section.