JPS5835516Y2 - Notsuku style pencil - Google Patents

Description

[Detailed description of the invention] This invention relates to a knock-type mechanical pencil in which a mechanical body consisting of a mouthpiece, a coupling, a chuck, a tightening ring, a spring, and a lead tank is built into the front and rear shafts. .

Conventional knock-type mechanical pencils have a cap or nib at the front of the front shaft, which limits the design, or when you want to use a knock-type mechanical pencil with a different lead diameter. For example, it is necessary to replace the cap, the mechanical part consisting of the chunk, core tank, tightening ring, and spring as separate parts, and the core diameter can be changed by simply replacing the mechanical part as in this invention. It was not possible to create a knock-type mechanical pencil.

This idea improves the above-mentioned conventional drawbacks by dividing the front end of the rear axle into several parts to give it elasticity, and by providing an external collar at the rear of the connector to create a mechanism between the front and rear axles. By clamping and fixing the body, the mechanism body is stored inside the front and rear shafts without wobbling caused by variations in dimensions, and it is possible to create knock-type mechanical pencils with different lead diameters by simply replacing the mechanism body. Not only that, but by making the length of the front shaft approximately equal to or longer than the length of the rear shaft, a knock-type mechanical pencil with an innovative design can be obtained.

The structure of this invention will be explained based on the drawings. As shown in FIG. 1, a base 3 having a built-in lead holder 2 for lightly holding a lead 1 is screwed into a connector 4.

A tightening ring 5 is loosely fitted inside the mouthpiece 3, and the tapered surface 7A of the chuck 7 is normally compressed by the elastic force of a spring 6.
is pressed against the tightening ring 5 and the chunk 7
A core tank 8 is fixed to the core tank 8.

A knob 9 is fitted on the rear outer surface 8A of the lead tank 8, and an eraser 11 covered with an eraser case 10 is fitted on the rear inner surface 8B of the lead tank 8.

Insert the mechanism body configured in this way into the front shaft 13,
The rear shaft 12 has a front end 12A divided into several parts to give it elasticity, and the rear part of the connector 4 has an outer collar 4A with a conical convex part.
, and by screwing the front shaft 13 and the rear shaft 12 together via the mechanism body, the front end 12A of the rear shaft 12 comes into contact with the outer flange 4A of the connector 4, and the mechanism body is attached to the front shaft 13. It is held and built in by the inner attack 13A and the front end 12A of the rear shaft 12.

With this configuration, the total length of the front shaft 13 is the same as that of the rear shaft 1.
2 or longer than the entire length of the rear shaft 12.

With this device configured as described above, the mechanism body can be replaced simply by removing the front and rear axles, and by preparing mechanism bodies with different core diameters, it is possible to replace the mechanism body with only one exterior core and with different core diameters. The knock-type mechanical pencil is assembled without any wobbling of the mechanical parts, and the cap is housed inside the front shaft, creating a product with a new sense of design that is completely different from conventional products. It has revolutionary effects such as the ability to

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing this invention. 1...core, 2...core holder-3...
...Base, 4...Connector, 4A...
Outer collar, 5...Tightening ring, 6...Spring, 7...Chunk, 7A...Tapered surface of chuck 7, 8...・Core tank, 8A
...Rear outer surface of core tank 8, 8B...
Rear inner surface of core tank 8, 9...knob, 10...
...Eraser case, 11...Eraser,
12... Rear shaft, 12A... Front end of rear shaft 12, 13... Front shaft, 13A... Inner thigh of front shaft 13.

Claims (1)

[Scope of utility model registration request] A cap 3 with a built-in lead holder 2 for lightly holding the lead 1
A tightening ring 5 is loosely fitted inside the chuck 7 by a spring 6 provided between the coupling tool 4 and the chunk 7.
In the knock-type mechanical pencil in which the chuck 7 is closed by being pressed against the tightening ring 5, the front end 12A of the rear shaft 12 is divided into several parts to give elasticity, and an outer collar 4A is provided at the rear of the connector 4, A knock-type mechanical pencil in which a front shaft 13 and a rear shaft 12 are screwed together, so that a mouthpiece 3 and a connector 4 are held between the front end 12A of the front shaft 13 and rear shaft 12.