Direct-liquid type pen ink sac

Abstract

The invention provides a direct-liquid type pen ink sac, which solves the technical problems that in the prior art the leak tightness in the replacing process is poor, the increased amount of ink is hard difficult to control, spillover and splash pollution are easy to generate, the manufacturing manufacture is difficult, and the like. The direct-liquid type pen ink sac comprises a sac body, a neck matching hole, a valve matching hole formed on the inner side of the neck matching hole, and a valve, wherein the surface of the inner cavity of the sac body is formed provided with an elastic seat surface, the inner cavity of the sac body is provided with a spring of which the two ends resist against the elastic seat surface and the valve, and the surfaces of the sac body and the valve matching hole are formed provided with capillary channels; and the neck matching hole consists of a step surface and a threaded segment. The direct-liquid type pen ink sac has flexible and automatic leak tightness, can perform simple and convenient quantitative perfusion with a matched ink bottle without ink spillover, is convenient and reliable, has good hand feel in use, is sealed by a seal ring step surface and connected by threads, has lower requirement on the precision of plastic parts, and is suitable for batch production; besides, the sac body can be used as a penholder and can be refilled with ink, thus the direct-liquid type pen ink sac has low writing cost is low and is particularly suitable for students and office work.

Description

Technical field: [0001] The invention relates to an ink bag for a straight-liquid pen, in particular to an ink bag with self-sealing performance, which can be used for refilling ink conveniently and cleanly, is portable for standby, and can be directly used as a pen holder. Background technique: [0002] The usual ink sac is composed of: a sac for storing ink, an item matching hole that matches the matching section on the item of the straight liquid pen at the outlet of the inner cavity of the sac, and a valve matching hole that is arranged inside the item matching hole. The inner cavity of the capsule and the valve matching hole form a valve (ball) that is tightly matched; some do not have a valve (ball), and a diaphragm connected to the joint is provided at the end of the fitting hole of the joint, and the inner cavity is sealed by the diaphragm. When in use, use the tip of the matching section of the straight liquid pen item to top through and match with the item matching...

AI Technical Summary

Problems solved by technology

The main defects of the usual structure are: 1. Poor sealing in the replacement process, because although there are balls (valves), the automatic sealing performance of the balls is very poor when the capsule is drawn horizontally or at a small inclination, so the replacement process If the ink is accidentally drawn, overturned, or dropped, the ink will splash. Second, the amount of ink is not easy to control, and spills are prone to occur. Ink pollution caused by careless splashes and spills is more troublesome; Most of the joints and the capsule are welded. Limited by the welding process, the available material surface is narrow and the material is too rigid, resulting in a narrow available tolerance band, increased manufacturing difficulty, and poor hand feeling; Most of the matching holes at the outlet of the inner cavity of the capsule adopt a cylindrical surface interference fit or a tapered surface interference fit, which is prone to problems such as too tight fit, difficult to pull out, too loose air leakage, water leakage, etc.

Images