Key structure

A key structure, comprising:

• a base plate, having a plurality of openings, an upper surface, and a lower surface opposite to the upper surface, and comprising a plurality of engaging protrusions protruding from the upper surface, wherein each of the engaging protrusions is located between two of the openings, and the two openings communicate with each other through an accommodation under each of the engaging protrusions;
• a first engaging member, a second engaging member, a third engaging member, and a fourth engaging member, wherein the first engaging member and the second engaging member respectively cover at least two of the engaging protrusions through injection molding, and the third engaging member and the fourth engaging member respectively cover one of the engaging protrusions through injection molding;
• a keycap, disposed above the base plate;
• and
• a connection assembly, disposed between the base plate and the keycap and having a first supporting member and a second supporting member pivotally connected to each other, wherein the first supporting member is located at an outer side of the second supporting member, a first end of the first supporting member is pivotally connected to the first engaging member and the second engaging member, a second end of the first supporting member is pivotally connected to the keycap, a first end of the second supporting member is pivotally connected to the third engaging member and the fourth engaging member, and a second end of the second supporting member is pivotally connected to the keycap, so that the keycap is adapted to move up and down relative to the base plate with the connection assembly.

A key structure, comprising:

• a base plate, having an upper surface, a lower surface opposite to the upper surface, a first opening, and a second opening, and comprising a first engaging protrusion extended from the upper surface, wherein the first engaging protrusion is located between the first opening and the second opening, and a width of the first engaging protrusion is smaller than a width of the first opening or the second opening;
• a first engaging member, positioned in the first opening and the second opening, and covering a top surface and a bottom surface of the first engaging protrusion;
• a keycap, disposed above the base plate;
• and
• a connection assembly, disposed between the base plate and the keycap, wherein one end of the connection assembly is movably connected to the keycap, and the other end of the connection assembly is movably connected to the first engaging member.