JPS5916232Y2 - Notsuku style pencil - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mechanical pencil whose centering amount can be adjusted according to the scribe's preference.

With conventional mechanical pencils, when you press the knob and move the lead tank/chuck from B to A (forward in the axial direction),
The tightening ring moves in the direction B-+A together with the chuck while being fitted onto the tapered surface of the chuck, and collides with the stepped portion of the mouthpiece or the stepped portion of the connector.

The distance until this collision is the centering amount, and because the moving distance cannot be adjusted, it may not be possible to obtain the desired centering amount, or if the centering amount is too long, the centering may easily break.
Also, if it was too short, it would be difficult to write.

This invention is an improvement over the conventional method, and by rotating the movable ring, the moving distance of the tightening ring from the locking step of the coupling device to the key can be adjusted to suit the scribe's preference. The amount can be adjusted.

Next, this invention will be explained based on the drawings. As shown in FIG. It is connected to 2.

A lead holder 6 configured to lightly hold the lead 5 is attached inside the cap 4.

A male thread 1A is provided on the outer peripheral surface of the connector 1, and a female thread 7A is provided on the inner peripheral surface of the movable ring 7, so that the connector 1 and the movable ring 7 are rotatably attached.

A part of the female thread 7A on the inner circumferential surface of the movable ring 7 is provided with a groove 7B extending in the circumferential direction and shaped like a keyhole in cross section. The key 8 is fitted loosely so that the bulge provided at the end of the key 8 has some play, and the key 8 is inserted into the through hole 1B provided in the connector 1 and extending in the axial direction (A-B direction). Since it is movably inserted, even if the movable ring 7 rotates, the key 8 will not rotate together with the movable ring 7.

Furthermore, the key 8 is inserted into the through hole 1B provided in the connector 1.
-+BMovably attached to the rear of the front axis direction).

A tightening ring 10 fitted onto the tapered surface 9A of the chuck 9
The locking portion 10A is loosely fitted between the locking step portion 1D of the connector 1 and the locking portion 8A of the key 8.

A core tank 11 is fixed to the rear part 9B of the chuck 9, and the step part 11A of the core tank 11 and the rear end part 1C of the connector 1 are connected to each other.
The chuck 9 strongly holds the core 5 due to the elastic force of the spring 12 provided between the chuck 9 and the core 5.

Furthermore, a knob 13 is fitted into the rear part of the wick tank 11.

Next, to explain the operation, in order to feed out the lead 5, the knob 1
Press 3 to close the core tank 11 and chuck 9B-)A
When moved in the direction, the tightening ring 10 remains fitted on the tapered surface 9A of the chuck 9 and moves along with the chuck 9 to B-+A.
When moving forward and moving forward a certain distance, the locking part 8A of the key 8
The locking portion 10A of the tightening cylinder 10 collides with the locking portion 10A.

If the compression is continued further, only the chuck 9 and the core tank 11 move forward, and the tightening ring 10 moves forward from the tapered surface 9A of the chuck 9.
is released, and the chuck 9 expands due to its own elasticity to release the lead 5, but since the lead holder 6 lightly holds the lead 5, the lead 5 does not fall off from the tip of the mouthpiece 4.

The tightening ring 10 extends from the state in which the tightening ring 10 is locked to the locking stepped portion 1D of the connector 1 to the locking portion 8A of the key 8.
The moving distance is the centering amount due to one press of the knob 13, and the core 5 protrudes from the tip of the base 4 by an amount equal to the moving distance of the tightening ring 10.

Next, when the knob 13 is released from the pressure, the chuck 9 continues to release the core 5 due to the elastic force of the spring 12, that is, while expanding due to its own elasticity, the chuck 9 carries the tightening ring 10 in the A-)B direction. However, the tightening ring 10 collides with the locking step ID of the coupling tool 1 and cannot be moved back, and only the chuck 9 moves back further, so the tightening ring 10 fits into the tapered surface 9A of the chuck 9. , the chuck 9, which had been expanded due to its own elasticity, closes and firmly clamps the lead 5, resulting in a writing state.

Here, when adjusting the amount of lead feeding by one knock, the movable ring 7 is moved in the A44B direction by rotating the movable ring 7 in any direction, either clockwise or counterclockwise. Connect the through hole 1B of the connector 1 from A to B.
The key 8 attached to the movable ring 7 so as to be slidable in the direction
At the same time, the distance l between the locking portion 8A of the key 8 and the locking portion 10A of the tightening ring 10 changes.

This distance l is the centering amount, so when the key 8 moves in the B-+A forward direction, the moving distance of the tightening tongue 10 becomes longer, the amount of lead out by one press of the knob 13 becomes longer, and the key 8 If it is moved in the A-)B direction, the moving distance of the tightening ring 10 will be shortened, and the amount of lead delivery will be shortened.

As explained above, in this invention, by rotating the movable ring clockwise or counterclockwise, the key can be moved in the A8B direction, and the moving distance of the tightening ring can be changed.

In other words, this is an epoch-making product that provides a mechanical pencil that allows the scribe to select the centering amount according to his/her preference.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of this invention, and Fig. 2 is an enlarged sectional view of the movable ring. 1...Connector, 1A...Male thread of connector 1, 1B...Through hole of connector 1, 1C...
- Rear end of connector 1, 1D...Locking stepped portion of connector 1, 2...shaft, 3...sheath, 4...
...Base, 5... Core, 6... Core holder, 7... Movable tongue, 7A...
Female thread of movable ring 7, 7B...Movable ring 7
Single groove, 8...Key, 8A...Key 8 locking part, 9...Chuck, 9A...
- Tapered surface of chuck 9, 10... tightening ring, IOA... locking part of tightening ring 10, 11...
... Core tank, 11A ... Stepped part of core tank 11, 12 ... Spring, 13 ...
Knob.

Claims (1)

[Scope of utility model registration request] There is a male thread 1A on the outer periphery of the connector 1 that connects the shaft 2 and sheath 3.
The internal thread 7A of the movable ring 7 is screwed into the sample screw 1A, and a bulge provided at the end of the key 8 is provided in the single groove 7B having a keyhole cross section extending in the circumferential direction of the movable ring 7. The key 8 is movably inserted into the through hole 1B extending in the axial direction of the connector 1, protrudes inward, and is fitted into the chuck 9 located at the tip of the core tank 11. The locking part 10A of the attached tightening ring 10 is connected to the key 8 and the connecting tool 1.
The key 8 is fitted loosely in the axial direction between the locking steps 1D, and the rotation of the movable ring 7 moves the key 8 back and forth in the axial direction, so that the moving distance of the tightening ring 10 can be arbitrarily changed. A knock-type mechanical pencil featuring