JPS593914Y2 - Shape pencil - Google Patents

Description

[Detailed description of the invention] Conventionally, in this type of mechanical pencil, the mechanical pencil main body is rotated by touching the hand directly, and the tip of the main body protrudes and retracts from the lower end of the barrel (for example, Jikkosho). No. 50-34113) and the like have been known, but these are a portion (mainly a notch portion) that protrudes outside the mechanical pencil body and is used as a knob.

), there was a defect that it was difficult to perform the above rotation operation.

The present invention attempts to eliminate the above-mentioned defects by using a part of the axial cylinder as a rotating knob, and the shape is such that it is combined with the upper end of the axial cylinder 4 to form the upper half of the coaxial cylinder 4. The rotating knob 7 is connected in a freely twisting manner, and the writing lead 2 is taken out by repeatedly pressing the knocking member 1 and releasing the same pressing into the barrel 4 and inside the rotating knob 7. A mechanical pencil main body 3 of a type in which the writing lead 2 is returned by applying a pressing operation to the member 1 and then pushing the writing lead 2 back is built in so that it can be twisted freely, and the mechanical pencil main body 3 has a rotation knob 7 and a shear 7°. 3 and a guide device consisting of mutually engaged protrusions 10, grooves 11, etc. that allow only vertical movement of the main body 3, and a guide device between the barrel 4 and the mechanical pencil main body 3 to allow the main body 3 to move vertically. The gist is that a spiral lifting device is provided, each consisting of a spiral groove 5, a projection 6, etc. that are engaged with each other.

In the illustrated embodiment, a headband-shaped convex strip 13 and a similar concave strip 13' are fitted to the upper end of the shaft cylinder 4, and inro jiyakuri 14, 14' are fitted.
The rotating knobs 7, which are shaped to combine to form the upper half of the coaxial cylinder 4, are connected in a twistable manner, and the knock member 1 is pressed down and pressed into the axis cylinder 4 and the rotating knob 7. By repeatedly applying the cancellation operation, writing lead 2
The mechanical pencil main body 3 is built in such a way that it can be twisted freely, and the writing lead 2 can be returned by pressing down on the knock member 1 and pushing the writing lead 2 back in. Pencil body 3 and same body 3
A protrusion 10 and a concave groove 11 are engaged with each other to allow only vertical movement of the mechanical pencil body 3, and a spiral groove 5 and a protrusion are engaged with each other to allow the main body 3 to move up and down. 6 are provided respectively.

In addition, in the figure, reference numeral 8 is used to ensure that the knock member 1 protrudes from the upper end of the barrel 4 even when the tip of the mechanical pencil body 3 is in a state where it can protrude from the lower end of the barrel 4. 15 is a backing, 16 is a lining member that is non-rotatably and non-removably fitted to the barrel 4, and 17 is a lining member that is non-rotatably and non-removably fitted to the rotation knob 7.

Since the present invention has a diagonal configuration, the tip (writing head) of the mechanical pencil body 3 can be adjusted by twisting the rotation knob 7 in the forward direction or in the opposite direction. can be protruded and retracted from the lower end of the shaft cylinder 4, and the rotating knob 7 can be enlarged for a comfortable grip as shown in the figure, so the above-mentioned defects can be completely eliminated. It is something.

In the present invention, the spiral groove 5 is steeply sloped so that the above-mentioned retraction can be performed only by applying more than one rotation to the rotary knob 7, and the operating angle of the rotation more than one rotation is also provided. It is also free to provide an engaging portion (stopper) that limits the distance.

[Brief explanation of the drawing]

The figures show an embodiment of the mechanical pencil of the present invention, in which Fig. 1 is an overall vertical sectional view showing the state in which the beam heel is rotated, and Fig. 2 is a vertical sectional view of the same showing the state in which the beam heel is turned out with hidden lines. It is. DESCRIPTION OF SYMBOLS 1... Knock member, 2... Writing implement, 3... Mechanical pencil body, 4... Shaft tube, 5... Spiral groove, 6...
...Rushing button, 7... Rotation knob, 8... Spring release,
10...Protrusion, 11...Concave groove, 13...Convex strip, 1
3'...concave line, 14.14'...inroshakuri, 1
5... Backing, 18.17... Lining member.

Claims (1)

[Scope of utility model registration request] A rotating knob 7 having a shape that is combined with the upper end of the shaft cylinder 4 to form the upper half of the coaxial cylinder 4 is connected to the shaft cylinder 4 in a freely twisting manner.
Then, in the rotary knob 7, the writing lead 2 is taken out by repeatedly pressing the knock member 1 and releasing the same pressing operation, and after applying a pressing operation to the knock member 1, the writing lead 2 is pushed in. A mechanical pencil main body 3 of a type in which the writing lead 2 can be returned is built in so as to be able to be twisted freely, and a projection knob 7 and the mechanical pencil main body 3 are engaged with each other to allow only vertical movement of the main body 3. 10 and a concave groove 11, etc., and a spiral lifting device consisting of a spiral groove 5, a protrusion 6, etc. which are engaged with the barrel 4 and the mechanical pencil body 3 to move the body 3 up and down, respectively. A mechanical pencil characterized by the following features: