Multi-core writing tool

Abstract

The invention relates to a multi-core writing tool, wherein a plurality of writing cores are accommodated in a shaft sleeve and are convenient in replacement. Meanwhile, the outer peripheral surface of the rear portions of the shaft sleeve (12) is equipped with a vertical hole (16a) and the rear end of the vertical hole is closed. An operation body (24) connected with the rear portions of the writing cores (20) can freely enter and exit in the radial direction of the vertical hole (16a). Therefore, when replacing the writing cores (20), the operation body (24) and the writing cores (20) connected with the operation body can be taken out in the radial direction thereof. Meanwhile, the operation body (24) and the writing cores (20) can also be inserted via the vertical hole (16a).

Description

technical field [0001] The present invention relates to a multi-core writing instrument with a plurality of writing shafts accommodated in a barrel, and more particularly to a multi-core writing instrument whose writing shafts can be easily replaced. Background technique [0002] Conventionally, writing implements described in Patent Document 1 or 2 are known as such multi-core writing implements. [0003] In Patent Document 1 and Patent Document 2, a plurality of writing shafts that can move forward and backward are accommodated in the shaft cylinder, and force is applied to the rear of each writing shaft, and an operating body is connected to the rear end of each writing shaft so that the operating body moves from The window hole formed on the side wall of the shaft cylinder protrudes radially outward. [0004] Moreover, in Patent Document 1, the structure of the multi-core writing instrument is as follows: the rear end of the shaft cylinder is provided with an opening th...

AI Technical Summary

Problems solved by technology

[0010] However, the multi-core writing instrument described in Patent Document 1 or 2 needs to be provided with a cover portion at the rear end of the shaft cylinder to open and close the opening that makes the window hole of the shaft cylinder open to the rear, so there is a rear end portion of the shaft cylinder. Utilization is limited, leading to a problem that the degree of freedom in design is reduced

[0011] In addition, since the operation for opening and closing the cover is required to replace the writing shaft, there is a problem that the operation is complicated.

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