KR880003395Y1 - Sharp-pencils of side knock system - Google Patents

Abstract

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Description

Side knock type pencil

1 is a longitudinal cross-sectional view of a first embodiment of the present invention.

FIG. 2 (a) and FIG. 2 (b) are perspective views of the press-fit pipe and the slide pipe according to the present invention.

Figure 3 is a perspective view of the push button according to the present invention.

4 is a perspective view of a link element according to the present invention.

5 and 6 are cross-sectional view of the working state of the present invention.

7 is a cross-sectional view taken along line VII-VII of FIG.

8 is a cross-sectional view taken along line VII-VII of FIG. 6;

9 is a longitudinal sectional view showing a second embodiment of the present invention.

10 is a partial longitudinal cross-sectional view showing a third embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: outer cylinder 2: threaded member

3: Tip cap 4: Spiral part

5: lead guide pipe 6: slider body

7: lead chuck 10: press-fit pipe

11: slide pipe 13: side knock mechanism

24: lead saving pipe

The present invention relates to a side knock-type mechanical pencil that can send the heart with a fingertip operation while maintaining the writing posture during writing.

As a conventional side knock type mechanical pencil, for example, a side knock type mechanical pencil installed at a wall portion of an outer cylinder having an inclined surface at least at the front end, for example, a press for side knock installed at a wall portion of the outer cylinder having a slope at least at the front end There was a button and a sliding member fixed to a lead chuck interlocked with the core storage pipe inside the outer cylinder to be slidably reciprocated in the axial direction to be in contact with the inclined surface of the front end of the push button.

The side knock-type mechanical pencil, which is configured in this way, is that when the push button is pressed, the sliding member is slid in the front inclined plane, and the lead chuck moves forward to send out the heart.

By the way, in the conventional side knock type mechanical pencil, since the lead chuck is advanced by a kind of cam movement in which the push button and the sliding member slide together, the position for installing the push button is greatly limited. Will receive. In other words, by pressing the center part of the push button, the lead chuck can be smoothly advanced through the sliding member, but when the front part or the back part of the push button is pressed, the entire push button maintains an equilibrium with the lead chuck by its single load. Since it does not try to sit down, the frictional resistance of the sliding contact surface between the push button and the sliding member is large, there is a problem that the sliding member is not able to operate smoothly and the core is not sent out.

Accordingly, the present invention is designed to solve the above problems, and an object of the present invention is to provide a side knock-type mechanical pencil that allows the core to be smoothly and reliably sent out even if any part of the push button is pressed.

The mechanical pencil of the side knock type of the present invention for achieving the above object, the outer cylinder having a tip 켑, and the lead storage pipe housed in the outer cylinder to slide reciprocating in the axial direction, at the front end of the lead storage pipe A side knock type mechanical pencil comprising a lead chuck interlocked with a lead guide pipe, a chuck ring for tightening the lead chuck, and a spring for pushing the lead chuck in a retracting direction. A link element having a pair of front and rear bending members bent forward along the axial direction of the lead chuck when a force pushed in the radial direction from the outside in connection with the lead chuck is connected to the link element and is externally connected to the It has a push button installed so that it can sit down against the front outer wall part.

When the pushbutton is pressed, the lateral knock type mechanical pencil configured as described above causes the link element to be bent forward and backward in two places along the axial direction of the lead chuck by the pressing force, so that the lead chuck is bent by the bending. Go forward and the pen will be sent out.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view showing a first embodiment of the present invention, wherein reference numeral 1 in FIG. 1 is an outer cylinder. In this embodiment, the outer cylinder 1 is the front outer cylinder 1A and the front outer cylinder ( The rear end of 1A) consists of a rear outer cylinder 1B which is connected by screwing to be detachably connected via a screw joint member 2 serving as a spring support. In addition, the front end of the front outer cylinder (1A) is connected by screwing so that the front end cap (3) can be attached and detached via the screw portion (4), the lead guide pipe (5) is in the shaft center of the front end cap (3) A slider 6 is provided at the rear end of the lead guide pipe 5, and the slider 6 is made of, for example, a synthetic resin or rubber capable of imparting a proper friction force to the lead.

In the front outer cylinder 1A, the lead chuck 7 is housed so as to move along the center of the shaft, and the rear end of the lead chuck 7 passes through the shaft hole of the rear nasal member 2 and the rear outer cylinder ( 1B) It extends inwardly inward. Here, reference numeral 8 denotes a chuck ring fitted outwardly at the front end of the lead chuck 7, and 9 is installed in the front screw joint 4 to support the rear end of the chuck ring 8 at the front end thereof to retreat the lead chuck 7. 10 is an annular stopper for regulating a, and 10 is a press-fit pipe which is formed as shown in FIG. 2 (a) and fitted to the lead chuck 7 and has an outward jaw 10A at its front end.

Also, reference numeral 11 denotes a slide pipe which is formed as shown in FIG. 2 (b) and fitted outward to the lead chuck 7 so that the front end thereof is engaged with the rear end of the press-fit pipe 10. 11A).

Reference numeral 12 denotes a first spring sandwiched between the stopper 9 and the outward jaw 10A of the press-fit pipe 10, and the first spring 12 connects the lead chuck 7 via the press-fit pipe 10. Pushing in the retraction direction to give the chuck to write.

Reference numeral 13 denotes a side knock mechanism assembled and fitted into the front outer cylinder 1A. The side knock mechanism 13 is composed of a combination of a push button 14 and a link element 15.

Meanwhile, as shown in FIGS. 3 and 5 to 8, the push button 14 can be lifted and lowered in the push button holder 16 formed partially in the axial direction on the outer circumferential wall of the front outer cylinder 1A. As it is fitted so that the cross section is in the shape of a heart (Hart), the outward jaw 14a is formed at both bottom ends, and the outward jaw 14a is raised as the push button 14 as shown in FIG. It serves to prevent the push button loading hole 16 from being pulled out at the limit position.

The link element 15 is housed in the front outer cylinder 1A, and is bent when the push button 14 is pressed to advance the lead chuck 7. That is, the link element 15 of this embodiment is formed on the inner surface of the upper surface link portion 18 and the inner wall of the front outer cylinder 1A, which is inscribed to the push button 14, as shown in FIG. The lower surface link portion 19, the upper surface link portion 18 and the lower surface link portion, which are caught in the inner groove 17 formed in a symmetrical position with the button 14 and are parallel to the upper surface link portion 18. (19) The front link portion 20 and the upper link portion 18 and the lower surface having a middle hinge (20c) in the middle portion while being connected to each front end via the hinge (20a, 20b) as a medium The rear link portion 21 having a <-shape parallel to the front link portion 20 having a hinge 21c in the middle thereof while being connected to each rear end via the hinges 21a and 21b. It consists of 6 parallel links.

Here, each of the front link portion 20 and the rear link portion 21 is formed with slit holes 22 and 23 having large diameter hole portions 22a and 23a thereon, and these slit holes 22 and 23 are formed. ) Is narrower than the diameter of each outward jaw (10A, 11AA) formed in the press-fit pipe 10 and the slide pipe 11 and is wider than the diameter of each of the pipes (10, 11), a large diameter hole 22a and 23a are formed with the diameter larger than the outer diameter of each said outward jaw 10A, 11A.

Therefore, the lead chuck 7 on which the press-fit pipe 10 and the slide pipe 11 are mounted can be simply inserted into the link element 15. However, these large diameter hole portions 22a and 23a are not necessarily required.

In addition, the upper surface link portion 18 is provided with a receiving hole 18A for accommodating the outward jaw 11A of the slide pipe 11 when the push button 14 is pressed.

In addition, the slit holes 22 and 23 are perforated so that the lead chuck 7 can be freely reciprocated, so that the front end of the intermediate hinge portion 20C of the front link portion 20 is formed in the indentation pipe 10. It is caught by the rear end of the outward jaw 10A, and the front end of the intermediate hinge portion 21c of the rear link part 21 is caught by the rear end of the outward jaw 11A of the slide pipe 11, respectively.

Numeral 24 denotes a lead storage pipe which is pierced in the rear outer cylinder 1B so as to be reciprocated in the axial direction, and has a leading end portion 25 at the front end thereof, and the lead chuck 7 at the shaft hole of the supporting portion 25. The back end is loosely inserted. Here, the second spring 26 is inserted between the front end portion 25 and the rear screw joint 2, and the second spring 26 prevents shaking of the core storage pipe 24.

Next, the procedure for assembling the present invention side knock type mechanical pencil will be described.

First, the lead storage pipe 24, the second spring 26, and the rear thread connecting member 2 are inserted in the rear outer cylinder 1B from the front end thereof in order.

The link element 15 is then pressed to insert the lead chuck 7 into which the press-fit and slide pipes 10 and 11 are pre-mounted from the front end, and then the first spring 12, the stopper 9 and the chuck ring 8 ) And the tip 3 (3) likewise inserted from the front end will complete the assembly.

Next, the pen sending operation will be described.

There are two means for transmitting the core of the present invention side knock type mechanical pencil, among which the first operation means is a normal knock operation. That is, when the lead pipe 24 is axially knocked from the rear end portion thereof, the lead chuck 7 is opposed to the first spring 12 via the second spring 26 located at the front end of the lead storage pipe 24. When the knock is released, the lead chuck 7 and the lead storage pipe 24 are retracted by the first spring 12 and the second spring 26 to be in a writing state.

On the other hand, the second operation means is a knock operation by the push button 14 provided on the side.

That is, when the writing is worn out as the writing continues, pressing the push button 14 causes the pressing force to act on the link requester 15 as shown in FIGS. The front link portion 20 and the rear link portion 21 of 15 are bent at their respective intermediate hinge portions 20c and 21c, wherein the intermediate hinge portions 20c and 21c have their respective bending actions. By pushing the outward jaws 10A and 11A of the press-fit pipe 10 and the slide pipe 11 in the axial direction, the lead chuck 7 moves forward in the axial direction against the first spring 12 so as to fill the core. It will be sent out.

When the push button 14 is released, the outward jaws of the press-fit pipe 10 and the slide pipe 11 are retracted with the lead chuck 7 being retracted due to the resilience force of the first spring 12. 10A and 11A push the intermediate hinge portions 20c and 21c in the retracting direction, thereby restoring the post element bending position and returning to the position before the push button 14 is pressed. .

Figure 9 shows a first embodiment of the present invention, the rear screw in the first embodiment to connect the front end of the rear outer cylinder (1B) to the rear end of the forefoot barrel (1A) directly by screwing Without the need of the member (2), the spring bearing ring (27) is fitted to the back of the link element (15) in the front outer cylinder (1A) so that the spring bearing ring (27) and the rear hand friction member (at the rear) By sandwiching the second spring 26 between the 25, the structure is simplified and the assembly efficiency can be improved.

10 shows a third embodiment of the present invention, which is a front lead chuck member 7A having a lead chuck 7B on its rear end with an outward jaw 7B, and the front lead chuck member. (7A) Intermediate pipe member 7c, whose front end is fitted outward at the rear end, and the intermediate pipe member 7c, whose rear end is inserted in its front end inward, and the intermediate pipe member 7C between the outward jaw 7B. Consisting of the rear pipe member 7F having the outward jaw 7E on the front end side to be fitted, the pipes are divided in order to be assembled in order, so that the structure can be further simplified.

As described above, the side knock type mechanical pencil of the present invention, when the push button is pressed by the hand holding the pencil, the link element is bent forward and backward in two places along the axial direction of the lead chuck by the pressed force. Since the lead chuck is advanced, the lead chuck can be smoothly advanced even when the push button is pressed, so that the lead can be reliably transmitted. Therefore, the performance of the side knock mechanism is higher than that of the conventional side knock type mechanical pencil. This has the effect of being greatly improved.

Claims (1)

An outer cylinder 1 having a tip cap 3, a lead storage pipe 24 housed in the outer cylinder 1 for reciprocating sliding in the axial direction, and interlocked with the front end of the lead storage pipe 24 A side having a lead chuck 7 arranged to be mounted, a first spring 12 for pushing the lead chuck 7 in the retracting direction, and a side knock mechanism 13 assembled and inserted into the outer cylinder 1. In the knock-type mechanical pencil, the side knock mechanism 14 is provided so that the side knock mechanism can be raised and lowered with respect to the outer peripheral wall portion of the front end of the outer cylinder 1, and is stored in the outer cylinder 1 and the push button ( 14) has a pair of front and rear bends which are connected to the lead chuck 7 and bent in front of the lead chuck 7 to bend the lead chuck 7 forward along the axial direction by the pressing force. Side knock type mechanical pencil, characterized in that consisting of a link element (15).