Ball point pen

#1. Field of the Invention

#The present invention relates to a ball point pen. More specifically, the invention relates to a ball point pen in which a spring for pressing forward a ball is provided within a tip body. In the description of the invention to be given hereunder, the word “front” indicates the tip-body side of the ball point pen, and the word “rear” indicates the ink-storage-tube side of the ball point pen.

#2. Description of the Related Art

#FIG. 1 is a longitudinal sectional view showing an embodiment of a ball point pen.

#FIG. 2 is an enlarged, longitudinal sectional view showing a temporary insertion of a spring shown in FIG. 1.

#FIG. 3 is an enlarged, longitudinal sectional view showing a state of completing the assembling of the spring shown in FIG. 1.

#The preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIGS. 1 through 5 shows embodiments of the present invention.

#A ball point pen 1 constructed according to the present invention is made up of a tip body 2 which rotatably holds a ball 23 at the front end, a holder 3 with its front part 31 into and to which the rear end of the tip body 2 is press fit into and fixed, an ink storage tube 8 having an opening at the front end into and to which the rear part 33 of the holder 3 is press fit and fixed, and a spring 5 placed in the tip body 2 and the holder 3.

#The ink storage tube 8 is a tubular body, which is opened at both ends and formed by resin protrusion molding. The rear part 33 of the holder 3 with the tip body 2 is press fit into and to the front end opening of the ink storage tube 8. The rear end of the ink storage tube 8 is opened to allow air to flow therethrough.