Electronic keyboard musical instrument

An electronic keyboard musical instrument comprising a keyboard section and a casing that accommodates therein said keyboard section, said casing comprising:

• a main casing section including a bottom plate having said keyboard section placed thereon, and a keyslip portion extending upward from said bottom plate in front of said keyboard section;
• a rear casing section including a roof plate forming a rear upper surface of said casing, and a back plate extending downward from a rear edge of said roof plate;
• and
• left and right side plates extending upward from said bottom plate at left and right sides of said keyboard section, said left and right side plates belonging to and being formed integrally with either one of said main casing section and said rear casing section,
• wherein a circuit board of an operation panel and a main circuit board of said electronic keyboard musical instrument are provided on said rear casing section, whereby said rear casing section is detachably attached to said main casing section along with individual ones of said circuit boards.

An electronic keyboard musical instrument comprising a keyboard section and a casing that accommodates therein said keyboard section, said casing comprising:

• a bottom plate having said keyboard section placed thereon;
• a keyslip portion extending upward from said bottom plate in front of said keyboard section;
• left and right side plates extending upward from said bottom plate at left and right sides of said keyboard section;
• a roof plate forming an upper surface of said casing;
• and
• a back plate extending downward from a rear edge of said roof plate,
• wherein said casing can be disassembled into a main casing section, including at least said bottom plate and said keyslip portion, and a rear casing section including at least said back plate, and
• wherein a circuit board of an operation panel and a main circuit board of said electronic keyboard musical instrument are provided on said rear casing section, whereby said rear casing section is detachably attached to said main casing section along with individual ones of said circuit boards.

An electronic keyboard musical instrument comprising a keyboard section and a casing that accommodates therein said keyboard section, said casing comprising:

• a main casing section including a bottom plate having said keyboard section placed thereon and a keyslip portion extending upward from said bottom plate in front of said keyboard section;
• a rear casing section including a roof plate forming a rear upper surface of said casing, and a back plate extending downward from a rear edge of said roof plate;
• and
• side plates belonging to and being formed integrally with either one of said main casing section and said rear casing section,
• wherein a circuit board of an operation panel and a main circuit board of said electronic keyboard musical instrument are provided on said rear casing section, whereby said rear casing section is detachably attached to said main casing section along with individual ones of said circuit boards.

An electronic keyboard musical instrument comprising a keyboard section and a casing that accommodates therein said keyboard section, said casing comprising:

• a main casing section including at least a bottom plate having said keyboard section placed thereon, and a keyslip portion extending upward from said bottom plate in front of said keyboard section;
• a rear casing section including at least a roof plate forming an upper surface of said casing, and a back plate extending downward from a rear edge of said roof plate;
• and
• slidingly-attaching means for slidingly attaching said rear casing section to said main casing section, whereby said rear casing section is detachably attached to said main casing section to constitute said casing, wherein side plates belonging to and being formed integrally with either one of said main casing section and said rear casing section and side plates connecting the main casing section to the rear casing section.