Patent ID: 6519813
Filing Date: 2003-02-18
Classification: B43K,Y10T

Abstract:
A fixing device for a pen clip comprising:a fixing cap having an inclined guiding surface and a flange at the top thereof, an indentation vertically extending along the side of said fixing cap and being disposed at a rim of said inclined guiding surface; an upper casing being a hollow tube one end of which is wide at the top and narrow at the bottom thereof; a fixing clip being bent and made by a metal piece and having a connecting part at one end thereof and another end; an adjusting assembly having a female-threaded hole at one end thereof and a flange at the other end thereof; and a lower casing having a conic hollow end while the other end thereof is secured with a fixing seat in such a way that an ink cartridge is only movable in a preset position; wherein respective ends of said fixing cap and said adjusting assembly are threadedly tightly fastened to one another by a screw at an end of said upper casing, and wherein, due to a curved design of said fixing clip, the clearance between both ends of said fixing clip is smaller than the diameter of said upper casing so that, when said flange of said fixing cap is engaged against a trumpet-shaped mouthpiece of said upper casing, said connecting part of said fixing clip is tightly received in said indentation while the another end of said fixing clip leans tightly against an outer side of said upper casing to create an opposite clamping force so said fixing clip will not be easily disconnected, and said upper casing is expanded by the screw for a tight connection with the fixing clip and therefore cannot be easily disconnected after a long period of use.