Multipurpose highchair

A multipurpose highchair, comprising two support legs, two armrests, a footrest, a seat plate, a tray, and a backrest, wherein each of the two armrests corresponds to one support leg, and is detachably provided at a top part of the corresponding support leg;

• the footrest is height-adjustable, and is provided between the two support legs;
• the seat plate is height-adjustable, and is provided between the two support legs;
• the tray is adjustable in a front-rear direction, and is provided between the two armrests;
• and the backrest is provided between rear ends of the two armrests, and is rotatable relative to the two armrests;
• wherein a detachable tray base is provided between the two armrests;
• the detachable tray base is in a “U” shape in a top view;
• two ends of the detachable tray base are each provided with a first notch;
• a left inner side and a right inner side of the detachable tray base are each provided with a first sliding channel and multiple locking ports spaced in the front-rear direction;
• the multiple locking ports are located above the first sliding channel;
• a bottom part of each of the multiple locking ports is open, and communicated with the first sliding channel;
• a bottom part of the tray is provided with two guide rods arranged at left and right sides;
• each of the two guide rods corresponds to one first notch, and is located inside the corresponding first notch;
• one side of each of the two guide rods is provided with a height-adjustable locking element;
• the height-adjustable locking element is configured to be inserted into a locking port of the multiple locking ports;
• the tray is provided therein with a pull assembly for pulling the height-adjustable locking element up and down;
• a front end of the pull assembly is provided with a pull plate;
• the bottom part of the tray is provided with an accommodating plate;
• a top part of the accommodating plate is provided with a pull plate groove for accommodating the pull plate;
• a bottom part of the accommodating plate is provided with an accommodating chamber with an open front end and a first movement port communicated with a top part of the accommodating chamber;
• a bottom part of a front end of the pull plate is provided with a pull part;
• and the pull part passes through the first movement port, and is located inside the accommodating chamber.