JPH018393Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a sharp pencil whose lead is drawn out by shaking the writing body in the axial direction, and prevents the lead from drawing out due to vibrations when being carried.

When carrying a sharp pencil whose lead is drawn out by shaking the cursive in the axial direction, the lead may be drawn out due to vibrations that occur when the holder is running, riding a bus, etc., or going up and down stairs. There were flaws.

This invention solves the above-mentioned drawbacks and prevents the lead tank from moving forward in the axial direction even if a heavy object moves by simply pressing a button when carrying the product, thereby preventing the lead from being drawn out. .

To explain this idea based on the drawings, the first
As shown in the figure, a cap 3 with a built-in lead holder 2 for lightly holding the core 1 and a connector 4 are screwed together via the tip 5A of the shaft 5, and the inner stage 3A of the cap 3 and the connector 4 are screwed together. A tightening ring 6 is loosely fitted between the inner stage 4A.
A chuck spring 8 is provided between the connector 4 and the front stage 7A of the core tank 7, and the load at the time of installation is limited to 200 g or less. Furthermore, a chuck 9 is fixed to the core tank 7, so that the chuck is normally The head 9A of the bolt 9 is pressed against the tapered surface 6A of the tightening ring 6. Front inner stage 7 of core tank 7
A weight body 10 is loosely fitted between B and the inner surface protrusion 7C, and several cores 1 are stored inside the weight body 10. A through hole 5B is provided at an appropriate position on the shaft 5,
On the other hand, the front part of the sliding body 11 is divided into several parts in the axial direction to form a resilient spring piece 11A.
1A is expanded from the inner diameter of the shaft 5. The sliding body 11 configured as described above has a shaft 5
The spring piece 11A of the sliding body 11 is movably fitted in a press-contact state to the inner surface 5C of the shaft 5.
A button 12 protruding from B is fixed. The core tank 7 is provided with an outer surface protrusion 7D, and the outer surface protrusion 7D is configured to be able to come into contact with the rear end 11C of the sliding body 11, and the rear outer surface 7 of the core tank 7
A knob 13 is fitted to E, and an eraser 15 covered with an eraser case 14 is fitted to the rear inner surface 7F.

Next, to describe the operation in FIGS. 1 and 2, in order to feed out the lead 1, the user swings the sharp pencil in the axial direction in the state shown in FIG. 1, and the weight body 10 slides. It collides with the front inner stage 7B of the wick tank 7, and the inertia of the weight body 10 overcomes the elastic force of the chuck spring 8, causing the wick tank and the chuck 9 to move forward. Therefore, the same action as the knock operation of a conventional knock-type mechanical pencil works, and the lead 1 is drawn out a fixed amount at a time. When returning the lead 1, the chuck 9 and the lead tank 7 move forward by knocking the knob 13 in the same way as with conventional knock-type sharp pencils, and the tightening ring 6 comes into contact with the inner stage 3A of the base 3, and the chuck 9 is returned.
are expanded and returned by pressing the core 1 against a finger or the paper surface. Next, to explain the case where the lead tank holding device is activated in order to prevent the lead 1 from being drawn out without permission due to vibrations during carrying, etc., the shaft 5
By moving the button 12 axially rearward (direction A→B) against the frictional force between the slider 11 and the slider 11, the rear end 11C of the slider 11 comes into contact with the outer protrusion 7D of the core tank 7, and the second The state shown in the figure will be reached. In this state, even if the sharp pencil vibrates and the weight body 10 slides while being carried, the sliding body 11 is in contact with the outer protrusion 7D of the lead tank 7, so that the front of the lead tank 7 in the axial direction (B→A direction) is prevented.

This invention, which has the above structure and function,
In a sharpening pencil whose lead is drawn out by shaking the shaft, there is no unnecessary drawing out of the lead when carrying it, and which has an extremely great practical effect when performing a sharpening pencil whose lead is drawn out by shaking it. It is.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing this invention, and FIG. 2 is a longitudinal sectional view of the main part showing the core tank holding device in FIG. 1 in an activated state. 1... Core, 2... Core holder, 3... Base, 4
...Connector, 5...Shaft, 6...Tightening ring, 7...
Core tank, 8...Chuck spring, 9...Chuck, 10...Weight body, 11...Sliding body, 12
... Button, 13 ... Knob, 14 ... Eraser case, 15 ... Eraser.

Claims (1)

[Scope of utility model registration request] A cap 3 with a lead holder 2 is attached to the tip of a shaft 5, and a lead tank 7 having a chuck 9 with a tightening ring 6 fitted onto the head 9A has an elastic force of 200 g or less when the chuck spring 8 is attached. In the sharpening pencil, the weight body 10 is slidably attached to the lead tank 7, and the sliding body 11 is slidable back and forth. and built into the shaft 5 so as to be able to come into contact with and separate from the outer surface protrusion 7D of the core tank 7, and the sliding body 1
A button 12 fixed to the shaft 5 protrudes from the through hole 5B of the shaft 5, and a spring piece 11A is attached to the front part of the sliding body 11.
A sharp pencil characterized in that the spring piece 11A is pressed against the inner surface 5C of the shaft 5 to apply an appropriate frictional force between the shaft 5 and the sliding body 11.