JPS5952699A - Aqueous ball pen and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has been made in order to completely eliminate ink L leakage due to incomplete connection between the ink groove of the ball seat and the connection part of the ink supply core, which has been a drawback of conventional water-based ballpoint pens. The purpose is to create an ink groove, that is, a capillary passage, from the pole seat to the entire length of the socket, and to make a direct capillary connection with the ink reservoir □ The following is a detailed explanation of one embodiment. If you explain it to
Figure 1 shows the cross-section of the metal deformed tube 1111 after exiting.
↓9 There is a tube wall made of extruded metal, and (2) is a hollow part that will become an ink capillary passage after completion.
Extrude with force from a spider die to obtain a 6mm material irregular shaped tube.

This is stretched while applying tension with each corrugated roll to φ
It was made into a 1 mm irregularly shaped tube.

Next, a φ1 mm irregularly shaped tube was machined into the shape shown in Figure 2 using a Swiss-type automatic lathe. ) The soke and soto were completed by processing in order and cutting off at the end.

By cutting, heat, quench, annealing, and after washing, the ball seat (3) and the inner ball (7) are removed, and the taper (4) σ] edge is rolled to hold the hole. This is a redundant hole pendant shown in Figure 3.

FIG. 4 shows a water-based ballpoint pen incorporating the ballpoint pen tip shown in FIG.
), and an ink former (11) consisting of a fiber bundle is fixed inside by L6unot, +1.1 month. The outer wall surface (6) of the capillary connection part of the ballpoint pen tip is placed directly at the end of the ink storage body (11), and the ink is guided directly from the storage body (11) to the capillary ink passage (2) of the ballpoint pen tip. The ink is supplied to the ball (7) via the ball seat (3).Therefore, there is no need for the ink supply body made of fiber bundles or irregularly shaped plastic rods used in the past, as well as the relay uniformity, and there is only one capillary connection. Therefore, the ink shortage due to incomplete connection has completely disappeared.

Historically, the number of parts has decreased, making assembly easier, and at the same time, the stability of quality has increased significantly.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention, in which Fig. 1 shows a cross section of a deformed metal tube, Fig. 2 shows a socket after machining, Fig. 3 shows a completed ballpoint pen tip, and Fig. 4 shows a finished ballpoint pen tip. is a vertical cross-sectional view showing a completed water-based ballpoint pen product. In the figure (]) Metal outer wall (2) Ink capillary passage (3) Ball seat (4) Taper (5) Step part (6) Capillary connection part outer wall surface (7) Ball (8) Shaft barrel (9) Ventilation hole ( 10) Tail sensor (11) Ink storage body Patent applicant Toplan Kogyo Co., Ltd. Representative Director Toshiyuki Otsuka No. 1 Figure 592-F, 4 Figure [)

Claims (1)

[Claims] 1. A pole seat and an outer wall surface of the capillary connection part are provided by machining such as cutting to a deformed tube in which a capillary passage is formed by metal extrusion and drawing, and the -C sink is directly connected to the ink storage part. A water-based ballpoint pen and its bond-making method. 2. Water-based ballpoint pen according to item 1, which uses physical processing such as electrical discharge machining instead of mechanical processing such as cutting, and its manufactureQ
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