Bracket apparatus applicable to keyboard and keyboard comprising the bracket apparatus

A keyboard, comprising a bracket apparatus, the bracket apparatus comprising a shell (1), wherein:

• a support plate (3) is hinged to the shell (1) through a hinge shaft (2), a releasably-connected support shaft (4) being disposed between a free end of the support plate (3) and the shell (1), a torsion spring (5) being sleeved onto the hinge shaft (2), two ends of the torsion spring (5) being respectively connected to the shell (1) and the support plate (3);
• and the shell (1) is further provided with a push switch (6) with a built-in spring apparatus, a locking bump (61) being disposed on the push switch (6), a locking mating bump (31) mating with the locking bump (61) being disposed on a side portion of the support plate (3), and incline bonding surfaces (611) mating with each other being disposed on both the locking bump (61) and the locking mating bump (31),
• wherein:
• a bottom portion of the shell (11) is provided with a switch accommodation slot (11);
• the push switch (6) is accommodated in the switch accommodation slot (11), a switch through hole (12) being disposed on a side wall of the switch accommodation slot (11);
• one end of the push switch (6) passes through the switch through hole (12) and extends outside the shell (1), a spring groove (13) being disposed on another side wall of the switch accommodation slot (11);
• and a side of the push switch (6) close to the spring groove (13) is provided with a spring mating groove (63), a compression spring (7) being disposed in the spring groove (13) and the spring mating groove (63), one end of the compression spring (7) being accommodated in the spring groove (13), and the other end of the compression spring (7) being accommodated in the spring mating groove (63) and the push switch (6) is provided with a screw press air-preventing hole (62), a limit screw (8) fixed on the shell (1) being disposed in the screw press air-preventing hole (62).