JPS5835509Y2 - Knotsuku style pencil - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for connecting the shaft and mouthpiece of a conventional mechanical pencil.

In conventional mechanical pencils, when fixing the connector to the shaft, it is fixed by screwing, gluing, or caulking, which complicates the assembly process. For example, when gluing is used, it takes time to dry and This method has the drawback of requiring mechanical equipment, etc., resulting in extremely high costs.

This invention forms a recess or a protrusion in the connector for removably screwing the base and the shaft.

The purpose is to ensure reliable engagement by locking and fixing to the engaging portion provided on the shaft, and to be able to attach it very easily.

Next, to explain this invention based on the drawings, as shown in Fig. 1, a recess 1A is provided in the shaft 1, so that a locking step 1B is formed on the inside, and the inner surface of the mouth end surface is tapered 1C. has been done.

On the other hand, the connector 2 has a cylindrical shape as shown in FIG. 2, and has a through hole in the center with an inner diameter suitable for inserting a mechanical part.

And in front of the center (to the right in the drawing) is the threaded part 2A.
is provided, and a groove 2B is provided at an arbitrary position on the rear outer surface.

Further, a slit 2C is provided in the axial direction from the rear end face to an arbitrary length on the center line of the cylinder.

3 and 4 show a configuration in which a projection 22A is provided on the outer surface of the connector 22, and one shaft 11 has a hole 11A).
This configuration is such that they can be combined by providing them.

When the connector configured in this way is pushed in from the front of the shaft with the mechanism inserted inside, the retaining step or protrusion provided on the shaft or connector is pressed against the inner peripheral surface of the shaft. The slit 2C is deflected and returns to its original state when it is located beyond the engagement stage of the shaft or in the hole and is locked and fixed.

In this locked and fixed state, the cap is screwed into the threaded part of the connector, but at this time, the concave groove or protrusion provided on the connector is not a quick read, but one or more are provided on the circumference. Because it is locked and fixed to the shaft, it will not rotate if you align it and push it in.

As explained above, according to this invention, when attaching a coupling to a shaft, there is no need for any machinery or equipment, and the coupling can be completely locked and fixed by simply pushing it into the shaft. Because of its high quality, it has the great effect of being able to provide inexpensive products to the market.

[Brief explanation of the drawing]

Figures 1 and 3 are longitudinal sectional views of the main parts that implemented this idea, and Figure 2
, 4 is a perspective view of the connector of this invention. 1.11... Shaft, 1A... Concave part of shaft 1, 11A... Hole part of shaft 11, 1B...
Locking stage of shaft 1, 1C...Taper of shaft 1, 2,
22...Connection tool, 2A...Connection tool 2
Threaded part, 22A...Protrusion of coupling tool 22, 2B
...Concave groove of the connector 2, 2C...Slit of the connector 2.

Claims (1)

[Claims for Utility Model Registration] Two screws are provided at the front of the cylindrical connector 2, and one or more grooves 2B or protrusions 22A are provided at arbitrary positions on the outer surface of the rear. 2CY configuration. On the other hand, a taper IC is formed on the inner surface of the end surface of the shaft 10, and a number of locking steps or holes 11A that match the concave grooves 2B or protrusions 22A of the connector are provided, and the respective positions are aligned and installed. A mechanical pencil with a knock type feature.