JP3026369U - Writing instrument - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To reduce the number of parts and the diameter of a shaft cylinder. A pusher (8) rotatably supported at the upper end of a shaft cylinder (1) is rotatably supported between an outer cylinder (9) and a tip of a projecting rod (5a) protruding from a relay cylinder (5). The hemispherical portion 8a has a tapered recess 8b at one end and the outer cylinder 9 at the other end.
Is provided with an operating rod 8c projecting outward from the opening 9a of the slider, and the taper projection 7a of the slider 7 slidably accommodated in the outer cylinder 9 is fitted into the taper recess 8b of the hemispherical portion 8a. The slider 7 is urged by the compression spring 6 in the direction of the pusher 8, and the lower end of the slider 7 is brought into contact with the upper end of the lead case 2 housed in the barrel 1 so as to be vertically movable. The lower end of 2 is a neck seat 3 attached to the tip of the barrel 1.
The core 10 can be projected only by laterally pressing the knob 12 provided on the operating rod 8c.
By omitting the function of pressing from directly above, it is possible to reduce the number of parts and the diameter of the barrel 1 accordingly.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 This invention relates to an improvement of a writing instrument such as a mechanical pencil.

[0002]

[Prior art]

 Conventionally, a writing instrument such as a mechanical pencil is provided with a pusher called a knock at the upper end of the barrel, and by pressing this pusher, the core housed in the barrel projects from the tip of the barrel. Is configured.

In such a knock-type writing instrument, since the pusher is linearly pushed down against the compression spring housed in the barrel and the core is taken out, a considerable amount of force is required to push the pusher. There is a drawback that it requires pressure and it is difficult to operate, such as when pulling out the core a little.

In order to improve such a defect, there is a writing instrument in which the pusher provided on the upper end of the shaft cylinder is pressed not only from above to directly below but also when the core is projected from the direction of 360 degrees. It is proposed in Japanese Patent Laid-Open No. 5-16382.

[0005]

[Problems to be solved by the device]

 However, in the writing instrument of the above publication, the hemispherical push-out portion provided on the pusher is provided in order to allow the core to protrude when the pusher is pressed downward from above and when it is pressed from the direction of 360 degrees. It has a structure that moves up and down with respect to the cylinder. For this reason, a pusher receiver that can move up and down is provided on the shaft cylinder so that the push-out section can move up and down smoothly, and the tube cap is pressed through this pusher receiver. In addition to increasing the cost, the diameter of the shaft cylinder was increased due to the provision of the pusher receiver, which made it difficult to write, especially for children. The present invention has been made to improve such a problem. By making the operation direction of the presser only in the lateral direction (360 degrees), the number of parts can be reduced and the writing instrument that can reduce the diameter of the barrel is inexpensive. It is intended to be provided to.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a pusher rotatably supported at the upper end of a shaft cylinder between a tip of a projecting rod having a hemispherical portion protruding from an outer cylinder and a relay cylinder. A tapered recess is provided at one end of the hemispherical part, and an operating rod is provided at the other end of the hemispherical part so as to project outward from the opening of the outer cylinder. The taper protrusion of the slider, which is slidably accommodated in, is fitted into the slider, and the slider is biased toward the pusher direction by the compression spring. The upper end of the lead case is in contact with the lower end of the lead case, and the lower end of the lead case is in contact with the seat mounted on the tip of the barrel.

With the above structure, when the knob is pressed from any lateral direction, the hemispherical portion of the pusher rotates, and the opening edge of the hemispherical portion pushes down the slider, so that the core case is pushed by the slider. When it is lowered, the chuck at the tip of the lead case expands and the lead projects from the lead hole in the neck seat.

Further, by repeating the above operation, the core of a desired length can be projected and the slider can be pushed down by the lever principle centered on the hemispherical portion of the pusher, so The core can be projected with a small pressing force as compared with the case of pushing it further downward. Furthermore, by attaching a knob that imitates a character such as an animation to the operating rod of the pusher, the commercial value as a writing instrument for children will be improved.

[0009]

[Embodiment of device]

 Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a writing instrument, FIG. 2 is an enlarged sectional view of a pushing mechanism, FIG. 3 is an exploded view of the same, and FIG. 4 is an explanatory diagram at the time of operation. In these figures, 1 is a cylindrical barrel formed of a resin such as vinyl chloride, in which a core case 2 is concentrically housed, a tapered neck 3 is provided at the tip, and an upper end. Pushing mechanisms 4 are screwed on the respective sides.

As shown in FIGS. 2 and 3, the push-out mechanism 4 includes a relay cylinder 5 that can be screwed to the shaft cylinder 1 and a protruding rod 5 a that is provided on one end of the relay cylinder 5. The compression spring 6 and the slider 7 that were fitted and inserted, the pusher 8 that abuts against the slider 7, and the compression spring 6, the slider 7 and the pusher 8 that were fitted in the relay cylinder 5 were housed. It is composed of an outer cylinder.

As shown in FIG. 2, the tip 5 b of the protruding rod 5 a of the relay cylinder 5 is formed in a hemispherical shape, and the hemispherical tip 5 b is fitted into the taper recess 8 b formed in the pusher 8. It is being touched. The pusher 8 has a hemispherical portion 8a, the taper recess 8b is formed at one end of the hemispherical portion 8a, and an operating rod 8c is provided at the other end of the hemispherical portion 8a. The tip end side of the operating rod 8c is projected outward from the opening 9a of the outer cylinder 9. In the outer cylinder 9, the hemispherical portion 8a of the pusher 8 is in contact with the inner peripheral surface 9b of the opening 9a.

That is, in the pusher 8, the hemispherical portion 8a is sandwiched between the concave spherical surface 9b of the outer cylinder 9 and the hemispherical tip portion 5b of the protruding rod 5a fitted in the tapered concave portion 8b. 8a and the hemispherical tip 5b are slidably rotatable, and with this rotation, the slider 7 is pushed down against the compression spring 6 by the opening edge 8d of the tapered recess 8b. ing. The slider 7 has a taper convex portion 7a which is fitted into the taper concave portion 8b of the pusher 8 from below, and a plurality of leg portions 7b are provided on the other end side.

The legs 7b are projected into the relay cylinder 5 by a plurality of notches 5d opened in the upper surface plate 5c of the relay cylinder 5, and the tips of the legs 7b are inserted into the shaft cylinder 1. The upper end of the lead case 2 that is vertically movable is abutted through the cap 2b. The wick case 2 is configured so that a plurality of wicks 10 can be accommodated therein through the opening 2a at the upper end, and the opening 2a is closed by the removable cap. A chuck cover 2c is provided at the tip of the lead case 2, and a plurality of chucks 2d radially divided, a closing ring 2e and a compression spring 2f fitted in the chuck 2d are housed in the chuck cover 2c. When the lead case 2 is pushed down against the compression spring 2f, the chuck 2d projects from the inside of the chuck cover 2c, and the chuck 2d expands due to its own elasticity, whereby the lead in the lead case 2 is opened. 10 is projected from the expanded chuck 2d, and when the pressing of the lead case 2 is released, the chuck 2d is retracted into the chuck cover 2c by the action of the compression spring 2f, and the chuck 2d is closed by the closing ring 2e. Are to be closed. The core 10 projected from the chuck 2d is projected forward from a neck seat 3 and a core hole 3a provided at the tip of the barrel 1.

Although the knob 12 imitating a character such as an animation is detachably attached to the operating rod 8c of the pusher 8, the knob 12 may be directly formed on the operating rod 8c.

Next, the operation of the writing instrument configured as described above will be described. As shown in FIG. 1, when the lead 10 is taken out from the state where the lead 10 is not shown, press the knob 12 attached to the operating rod 8c with a thumb or the like from any lateral direction (arrow A in FIG. 4). When the knob 12 is tilted to rotate, the hemispherical portion 8a of the pusher 8 is rotated, and the opening edge portion 8d of the pusher 8 pushes the tapered convex portion 7a of the slider 7 from above as shown in FIG. As a result, the slider 7 is pushed down against the pressing spring 6, so that the lead case 2 that abuts the slider 7 is also pushed down, and the chuck 2d provided at the tip of the lead case 2 projects from the chuck cover 2c and expands. The core 10 is projected from the core hole 3a through the opened and expanded chuck 2d.

When the core 10 of a desired length does not project at once, once the finger is released from the knob 12, the pusher 8 returns to its original position by the action of the compression springs 2f and 6, so that the lateral direction is again detected. This operation is repeated until the core 12 of the desired length is pushed out by pressing the knob 12 from the side, and the core 12 can be pushed out by simply pushing the knob 12 from the lateral direction and after use. When the lead 10 is to be immersed, the tip of the lead 10 may be pushed in while pushing the knob 12 laterally. Furthermore, since the core 10 does not project even when the knob 12 is pressed, the core 12 does not protrude, so that it is fitted inside the knob 12 (see phantom line in FIG. 2) or screwed into the two-divided structure 12 ', 12 ". A book 13 can be provided.

[0017]

[Effect of device]

 As described in detail above, this invention allows the core to be projected by simply pushing the knob provided on the operating rod of the pusher from the lateral direction, so compared to the conventional push-down type that pushes it down directly from above. In addition to being easy to operate, the lever pushes the hemispherical part of the pusher as the center to push down the slider to project the core.Therefore, the pressing force is smaller than when pushing down the core to project the core. Therefore, it is possible to easily perform the operation of slightly projecting the lead, and it is possible to solve the problem that the lead is wasted because the lead is over-extracted and the lead is wasted. Further, since the core does not project even when the knob is pressed, it can be used as a stamp by providing a stamp on the knob, which is convenient.

Further, compared with the conventional one in which the core is projected in both the direct downward direction and the 360 ° direction, the number of parts can be smaller, so that the structure can be provided inexpensively and the diameter of the shaft cylinder can be reduced. Therefore, it is possible to provide a writing instrument that is easy for children to write.

Moreover, by providing a knob that imitates a character such as an animation on the operating rod of the pusher, it is possible to arouse the interest of the child, and thus the product value as a writing instrument for children is greatly improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a writing instrument according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the pushing mechanism provided in the writing instrument according to the embodiment of the present invention.

FIG. 3 is an exploded view of the pushing mechanism provided in the writing instrument according to the embodiment of the present invention.

FIG. 4 is an operation explanatory view when the writing instrument according to the embodiment of the present invention is operated.

[Explanation of symbols]

 1 shaft cylinder 2 core case 3 neck 5 relay cylinder 5a protruding rod 6 compression spring 7 slider 7a taper convex portion 8 pusher 8a hemispherical portion 8b taper concave portion 8c operating rod 9 outer cylinder 12 knob

Claims (2)

[Scope of utility model registration request] 1. A pusher 8 rotatably supported at the upper end of the shaft cylinder 1 is provided with a hemispherical portion 8a between the outer cylinder 9 and the tip of a projecting rod 5a protruding from the relay cylinder 5, The hemispherical portion 8a has a tapered recess 8b at one end and the outer cylinder 9 at the other end.
Is provided with an operating rod 8c projecting outward from the opening 9a of the slider, and the taper projection 7a of the slider 7 slidably accommodated in the outer cylinder 9 is fitted into the taper recess 8b of the hemispherical portion 8a. The slider 7 is urged by the compression spring 6 in the direction of the pusher 8, and the lower end of the slider 7 is brought into contact with the upper end of the lead case 2 housed in the barrel 1 so as to be vertically movable. The lower end of 2 is a neck seat 3 attached to the tip of the barrel 1.
A writing instrument that comes into contact with. 2. The writing instrument according to claim 1, wherein the operating rod 8c of the presser 8 is provided with a knob 12 imitating a character such as an animation.