Patent ID: 7842895

Claim:
A key switch structure, comprising a circuit module, a key cap, and a linking mechanism set between said key cap and said circuit module to guide vertical movement of said key cap relative to said circuit member for enabling said key cap to be pressed by a user to trigger said circuit module in producing a control signal, wherein said linking mechanism comprises: a positioning board fastened to said circuit module, said positioning board comprising at least one first coupling portion and at least one second coupling portion; a first link obliquely coupled between said at least one first coupling portion of said positioning board and said key cap, said first link comprising a cylindrical base coupled to said at least one first coupling portion of said positioning board and two oblique bearing portions bilaterally disposed on the middle; and a second link obliquely coupled between said at least one second coupling portion of said positioning board and said key cap and extending across said first link, said second link comprising a cylindrical base coupled to said at least one second coupling portion of said positioning board and two shoulders bilaterally disposed on the middle, said shoulders supporting said oblique bearing portions of said first link respectively for enabling said first link and said second link to be moved in scissor action when said key cap is pressed by a user.