Fixing device

A fixing device, comprising:

• a base comprising a main body, a storage cavity defined in said main body, a plurality of positioning blocks embossed on a surface of said storage cavity, at least one resisting portion formed on said main body at a relatively higher position, at least one accommodating portion formed on said main body at a relatively lower position, and a pulling portion extended outward from said resisting portion;
• a sleeve comprising a sleeve body passed through said storage cavity, a channel formed inside said sleeve body, an outwardly protruding stop ring body formed on a bottom side of said sleeve body, a plurality of limiting grooves located on said stop ring body for said positioning blocks to resist and position respectively, and a fixing flange extended downward from a bottom side of said stop ring body;
• a fixing member comprising a shank passed through said channel, a connecting portion locate on a top end of said shank, and a latch body expanded outward at an opposing bottom end of said shank;
• an elastic member mounted between an outside of said shank and said sleeve;
• and
• a cap comprising a cap body, a receiving chamber formed inside said cap body, an engaging groove downwardly connected with said receiving chamber for said connecting portion of said fixing member to be fastened, and a first positioning area, a guide ramp and a second positioning area formed on a bottom side of said cap body for said resisting portion and said accommodating portion of said base to contact and accommodate;
• wherein when said pulling portion is driven to rotate in a first direction, a resisting position of said resisting portion is moved from said first positioning area to said second positioning area via said guide ramp, and said cap and said fixing member are moved upward to become unlocked;
• when said pulling portion is driven to rotate in an opposing second direction, a resisting position of said resisting portion is moved from said second positioning area to said first positioning area via said guide ramp, and said cap and said fixing member are moved downward to become locked.