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Ball pen

A ballpoint pen, ballpoint technology, applied in ballpoint pen, nib, printing and other directions, can solve problems such as improper assembly

Inactive Publication Date: 2002-06-26
THE PILOT INK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The front end of the straight portion of the spring can catch on the back surface of the ball receptacle and improper fit may occur

Method used

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Examples

Experimental program
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Embodiment Construction

[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Figure 1-5 Examples of the invention are shown.

[0034] The ballpoint pen 1 made according to the present invention consists of an end body 2 that rotatably holds a ball 23 at the front end, a holding portion 3 with a front portion 31, an ink storage tube 8 with an opening at the front end, and A spring 5 arranged in the end body 2 and the clamping part 3 constitutes, wherein, the rear end of the end body 2 is press-fitted and held on the front part 31 of the clamping part 3, and the rear end of the clamping part 3 The portion 33 is press fit and held in the opening of the ink storage tube 8 .

[0035] The ink storage tube 8 is a tubular body that is open at both ends and is molded by resin extrusion. The rear portion 33 of the clamping portion 3 having the end body 2 is press-fitted into the front end opening of the ink storage tube 8 . ...

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PUM

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Abstract

A spring for pressing a ball forward is disposed within a tip body and a holder. The spring includes a straight part and a coil part. The straight part is inserted into the tip body, and the coil part is disposed within the holder. Protrusion is provided on the inner surface of the holder. The coil part climbs over the protrusion and its engagement and stopping are set up.

Description

technical field [0001] The invention relates to a ballpoint pen. More specifically, the present invention relates to a ballpoint pen in which a spring for pressing the ballpoint forward is provided in an end body. In the following description of the present invention, the term "front" refers to the tip body side of the ballpoint pen, and the term "rear" refers to the ink storage tube side of the ballpoint pen. Background technique [0002] This type of ballpoint pen is disclosed, for example, in Japanese Utility Model No. 2577544. In this ballpoint pen, a spring for pressing the ball forward includes a coiled portion and a straight portion. A straight portion for pressing the ball forward is inserted into the end body. The winding portion for generating elastic force is located at the rear of the end body. In this publication, the rear end of the winding portion is engaged with a spring receiving seat as a separate piece, and is braked by the spring. [0003] Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43K7/08B43K1/08B43K7/00
CPCB43K1/086B43K7/00
Inventor 田中秀之
Owner THE PILOT INK CO LTD