Patent ID: 6921225

Claim:
A structure of a ballpoint pen with extensible closing top comprising a spring pen top, a handhold, an extensible pen body, a cap and a pen refill, and which utilizes drawing back of the extensible pen body to ready the ballpoint pen for usage, moreover, when the ballpoint pen is not in usage, a front end of the spring pen top can be pushed forward, thereby covering the pen refill; and characterized in that: the spring pen top is configured on a frontal extremity of entire ballpoint pen, and which comprises a revolving cap, a central sleeve, a spring, a spring stop sleeve and an outer sleeve, the outer sleeve is first disposedly sleeved onto a frontal extremity of the central sleeve, whereupon the spring is configured on a rear end of the outer sleeve, and the spring stop sleeve is tightly disposed interior of a rear end of the central sleeve, thereby forming a sliding configuration that enables forward and backward movement therewith, thereafter, the revolving cap is screwed onto the rear end of the outer sleeve; the hand hold is disposedly sleeved onto a rear end of the revolving cap of the spring pen top, and which comprises a hand hold body, a rubber sleeve, a hand hold sleeve and a ring, wherein an outer side wall of the hand hold sleeve is first sheathed with the rubber sleeve, whereafter, the aforementioned assembled structure is sheathed with the hand hold body at an appropriate position thereof so that the rubber sleeve is allowed to penetrate through an elliptical hole defined in the hand hold body, thereafter, the ring is disposedly mounted on a rear end of the hand hold body; the extensible pen body comprises an inner sleeve and an outer slide sleeve, a front end of the inner sleeve is sleeved within the ring, one side of the inner sleeve is provided with a rectangular hole, a plastic slide piece is disposedly mounted within the outer slide sleeve, and two protruding strips inwardly extend from the plastic slide piece, thereby enabling the rectangular hole of the inner sleeve to clasp onto exterior of the two protruding strips, moreover, a clasp point extends from another side exterior wall of the rectangular hole of the inner sleeve, and which can clasp within a locating hole of the outer slide sleeve; the cap comprises a metal cover and a plastic inner lining, the metal cover is provided with a pen clip and a front cover stopper, and the plastic inner lining is configured on a front end of the front cover stopper, a butt pin is configured at an appropriate position in the plastic inner lining, the butt pin penetrates and is thereby configured interior of the extensible pen body and the hand hold, and butts against a rear end of the spring pen top; the pen refill is disposed interior of the extensible pen body and the handhold, a rear end of the pen refill is provided with a locating portion, which is utilized to fixedly configure same in a front end of the plastic inner lining of the cap.