KR900007187B1 - Sharp pencil - Google Patents

Abstract

The pencil includes an outer cylinder (1) with a side pushing hole (102B) formed therein, and a side pushing member (22) movably disposed in the side pushing hole. The side pushing member contacts a lever which is totally mounted within the outer cylinder and which contacts a lead advanced mechanism. Upon pressing in of the side pushing member, the lever is pivoted about its axis and caused to press downwardly against the lead advance mechanism to thereby cause advancement of a lead.

Description

Mechanical pencil

1 is a longitudinal sectional view showing one embodiment of the present invention.

2 is a longitudinal sectional view of the intermediate outer cylinder.

3 (a) to (d) are sectional views taken along the lines A-A to D-D of FIG. 2, respectively.

4 is a plan view of the knock button.

5 is a side view of the knock button.

6 is a front view as seen from the E direction of crab 5 degrees.

7 is a front view seen from the F direction of FIG.

8 is a plan view of the lever.

9 is a side view of the lever.

FIG. 10 is a front view seen from the direction G of FIG.

11 is a plan view of the outer sleeve.

12 is a longitudinal sectional view of the outer sleeve.

13 is a plan view of the stopper.

14 is a longitudinal sectional view of the stopper.

FIG. 15 is a front view of FIG. 14 as viewed in the H direction. FIG.

Figure 16 is the ping plane of the inner sleeve.

17 is a longitudinal sectional view of the inner sleeve.

FIG. 18 is a front view seen from the direction I of FIG. 16. FIG.

19 is a cross-sectional view illustrating the opening operation of the lead chuck.

* Explanation of symbols for main parts of the drawings

1: outer cylinder 1A: front outer cylinder

1B: Medium outer cylinder 1C: Rear outer cylinder

1D: Tip Cap 2: Knock Control

3: lever 4: outer sleeve

5: inner sleeve 6: pen delivery mechanism

7: Cylindrical ring 8: Release ring

9: Slider 12: Lead storage area

17: first spring 18: second spring

19: stopper 22: operation protrusion

31 lever lever shaft 42 penetrating hole

61: lead chuck 66: third spring

S: Feelings

The present invention relates to a mechanical pencil that can send the pen lead to the side knock, and in particular, the pen can be sent out by the side knock method and the pen lead is automatically sent when the slider is released from the writing pressure from the ground It is related to a mechanical pencil that can be stored when it is lost and when writing is not possible.

When the pressure is applied recently, the pen tip is bitten, and when the pen pressure is released, the chuck bite about the pen tip is moved when the pen is moved from the lead chuck to the front end of the pen by the elasticity of the slider on the front end of the writing instrument and the abrading member installed on the slider. An automatic mechanical pencil has been proposed in which a so-called one-way chuck is installed which releases the action and sends out the heart.

However, in the above conventional mechanical pencil, there is a problem that only the front end of the slider protrudes slightly from the front end cap because the slider cannot be completely locked and accommodated on the operating mechanism. If you want to protrude (S), if you knock the tip while holding the pencil pencil while writing, the core (S) will be protruded, but if you do the knock knock as it is, There was a problem that makes the ground dirty when you do.

In addition, the conventional mechanical pencil, which can send the lead to the side knock, is too complicated and the side knock has to be corrected and the side knock must be operated while the side knock is operated. There was also a problem that the operation to send the heart while maintaining the noise state that is doing the same.

Accordingly, the present invention has been invented to solve the above problems, by removing the tip knock mechanism so that the slider is completely fastened to be accommodated, the side knock in the noise state of the writing instrument when writing, the front end of the slider The purpose is to provide a mechanical pencil that can be sent out from the core (S).

According to the present invention, a knock operation part capable of side knock operation is provided as it is while holding a writing instrument at the time of writing, and in addition to the knock operation part, the slider has a cylindrical ring fitted to the front end of the sleeve so that the slider can be completely engaged and stored. .

The mechanical pencil of the present invention configured as described above is capable of delivering the core in accordance with the side knock operation by the knock operation unit, and complete fastening and storing of the slider by the cylindrical ring.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 shows a first embodiment of the present invention, which is an example in which the present invention is applied to a so-called automatic pencil, and the outer cylinder 1 includes a front outer cylinder 1A, a middle outer cylinder 1B, and a rear outer cylinder. 1C to 1C, the outer cylinders 1A to 1C are connected to each other so that they can be attached and detached by fitting means.

And the front end of the front tube (1A) is fitted so that the front end cap (1D) can be detachably freely.

The intermediate cylinder 1B is a lever rotated by the knock operation unit 2 and the knock operation unit 2 described later, as shown in FIGS. 2 and 3 (a) to (d). While storing (3), the fitting portion 101B fitted with the front cylinder 1A, the sleeve-shaped side knock operation hole 102B formed in the axial direction, and the lever pivot shaft 31 can be rotated. Hanging lever rotary groove (103B). The knock operation part rotation groove | channel 104B which hangs the rotating piece 21 of the knock operation part 2 so that rotation can be provided, and the pen core fitting hole 105B are provided.

Here, the side knock operation hole (102B) is formed in a slit shape on the upper portion of the intermediate outer cylinder (1B), the operation protrusion (operation portion) 22 of the knock operation portion (2) is protruded to hand the outer cylinder (1) The operation protrusion 22 is pushed and operated by the fingertip.

On the other hand, the knock operation portion 2 is formed in the axial direction as shown in Figs. 4 to 7, the operation protrusion 22 and the front end of the lever pushed to the fingertips as described above The piece 23 and the rotating piece 21 of the back end are provided.

Here, the lever pressing piece 23 is divided into both cutouts 24 in the center, as shown in FIGS. 4 and 6, and the pendulum S passes through the cutouts 24 in the center. To ensure that the passage is secured.

Further, a bent portion 25 is formed at the front end of the lever pressing piece 23, and when the knock operation portion 2 is not pressed, the side knock of the intermediate outer cylinder 1B, as shown by the solid line in FIG. The knock operation part 2 does not protrude out of the intermediate outer cylinder 1B by contacting the front end side wall of the operation hole 102B.

Then, the lever 3 is pressed by the knock operation unit 2 as shown in FIG. 1 to rotate in the direction of the arrow about the lever pivot shaft 31 to push the outer sleeve 4 forward. As shown in FIGS. 8 to 10, the outer sleeve pressing piece 32 toward the front end, the through hole 33 into which the lever pivot shaft 31 is fitted, and bent backwards are knocked. The engaging piece 34 engaged with the lever pushing piece 23 of the operation part 2 is provided.

However, the outer sleeve 4 pressed by the lever 3 is always pushed backward by the first and second springs 17 and 18, as shown in FIG. By holding the lever (3) and the knock operation unit 2 in the solid line position of Figure 1 by pressing, and pressing the knock operation unit (2) in order to discharge the lead (S) back to the original solid line position It is resilience that allows it to be returned.

The outer sleeve 4 has a cylindrical shape as shown in FIGS. 11 and 12, and has a stopper catching groove 41 formed in a predetermined length along the axial direction from the front end, and the penetrating through hole at the rear ( 42). In this case, the stopper protrusion 191 to be described later is pressed upward from the rear end wall 41a of the stopper engaging groove 41. In the outer sleeve 4, the stopper 19 and the inner sleeve 5 are arranged to be slidable in the axial direction.

On the other hand, the stopper 19 has a function to move the lead chuck 61, which will be described later in the forward movement during the pen core transfer operation, to move forward, the lead chuck pressing cylindrical portion 192 as shown in FIGS. ), A stopper protrusion 191 engaged with the pen core through hole 42, the outer sleeve 4, and the inner sleeve 5 formed along the central axis direction, and the side portion of the stopper protrusion 191. It is formed on the frictional sliding projection (191a) to impart a predetermined friction force to the friction sliding groove 51 of the inner sleeve (5). A distance equal to the distance a is provided between the front end portion of the lead chuck pressing cylinder portion 192 and the rear step portion 65a of the lead chuck 61.

In addition, the inner sleeve 5 has a cylindrical shape arranged to slide in the outer cylinder 1, as shown in FIGS. 1 and 16 to 18, the frictional projection of the stopper protrusion 191 ( A pair of friction sliding grooves 51 that allow sliding movement while applying frictional force to 191a) is formed in the same shape.

Here, the friction sliding groove 51 is in the guide groove 51a for guiding the stopper protrusion 191 of the stopper 19 and the guide groove 51a, as shown in FIGS. 16 to 18. In communication with the sliding groove (51b), the intermediate portion of the sliding groove (51b) is formed in the inner staircase 52, the inner staircase 52 is a friction of the stopper projection (191) By applying a frictional force to the imparting protrusion 191a, the entire inner slide 5 is advanced together with the stopper 19 and the outer sleeve 4 by a predetermined amount to serve to send the pen core S.

In this inner sleeve 5, as shown in FIG. 1, a release ring 8 is disposed at the front end thereof through a cylindrical ring 7, and a pen delivery mechanism 6 is disposed therein. In addition, the outer circumferential portion is formed with a rear movement restricting protrusion 53 which is engaged with the inner staircase 101d of the tip cap 1D to restrict the inner sleeve 5 from moving to the left side.

Here, a distance b is provided between the front end of the cylindrical ring 7 and the inner step portion 101d of the tip cap 1D, and this distance b is the amount of delivery of the core at the time of side knocking described later. do.

In addition, a second spring 18 is installed between the release ring 8 and the slider 9 so as to slide in the front end of the tip cap 1D, whereby the release ring (8) to the rear, the slider (9) is pushed forward, respectively, where the front end of the inner step (7a) of the cylindrical ring (7) and the locking projection 91 of the slider (9) The distance c is provided in between. This distance c is a range in which the slider 9 can retreat when automatic writing described later is made.

Therefore, the front end inner staircase 7a serves to regulate the retreat movement of the slider 9 during automatic writing.

And the release ring (8) is the rear end of the back end of the cylindrical ring 7 of the inner staircase 71, the retreat movement is regulated, so that the inner sleeve (5) is the cylindrical ring ( 7) and the release ring 8 is pushed in the retraction direction by the second spring 18, respectively.

In addition, the cylindrical ring (7) ① retains the inside of the fastening ring (8) so that it can be moved, ② ② retreat of the release ring (8) to the front end of the rear inner staircase (71) A function that regulates movement, ③ A function that prevents the ball 63, which will be described later, from falling behind the rear inner stepped portion 71, and ④ The slider 9 is completely stored in the tip cap 1D. It will function to fasten in position.

The locking projection 91 is formed on the outer circumferential surface of the rear outer cylinder of the slider 9 as a locking means between the slider 9 and the cylindrical ring 7. A locking recess 72 is formed on the inner circumferential surface of the front end of the cylindrical ring 7, and the locking protrusion 91 of the slider 9, which has been retracted as described below, is hooked on the locking recess 72. The slider 9 is fastened at a position where the slider 9 is completely received in the tip cap 1D.

Then, when the side knock to the locking ring (8) to be described later to move forward to press the rear end of the slider (9) in the fastening position to function to release the fastening state. In addition, the slider 9 is provided with a frictional inner cylindrical portion 92 that can be elastically deformed in the radial direction, so that the frictional inner cylindrical portion 92 gives a predetermined friction force to the core (S). Here, the frictional force is a frictional force that allows forward movement of the core (S) but inhibits retraction.

On the other hand, the rear outer cylinder (1C) is a lead housing portion 12 that can accommodate a plurality of lead cores (S), and the eraser rubber storage portion (14) formed inside the rear end of the lead housing portion (12) ), The eraser rubber 15 is inserted into the eraser rubber container portion 14 so that the cap 16 covering the eraser rubber 15 is detachably attached to the rear end portion.

In FIG. 1, the upper half of the slider 9 (denoted by crab 1 (i)) shows a longitudinal cross-sectional view of writing (hereinafter referred to as normal) when writing, and the lower half (in FIG. 1 (ii)). Denotes a longitudinal variation at the time of tightening described later.

Next, the pen delivery mechanism 6 mounted in the sleeve 5 will be described.

The pen core feeding mechanism 6 has a lead chuck 61 divided into two sides along an axis, a ball 63 held by a ball holding support 62 formed at a head of the lead chuck 61, and the inside thereof. A metal tube 64 having a tapered wall 64a formed on an inner surface of the sleeve 5 as necessary to fit the ball 63 between the ball holding support 62 and holding the ball 63; A third spring 66 for tightening the chuck mounted between the inner stair part 52 of the inner sleeve 5 and the front stair part 65a of the engaging stair part 65 of the lead chuck 61 is provided. have.

The pen delivery mechanism 6 is configured to allow the pendulum S to move forward but to prevent retreat. The detailed configuration of the pen delivery mechanism 6 is described in Japan, which has been filed by the applicant. It is described in detail in Korean Utility Model Registration Application No. 62-109091.

Z로 된다. 이는 후술하는 자동필기와 사이드노크가 이루어질때 슬라이더(9)가 전진함에 따라 리이드척(61)으로부터 필심(S)을 앞쪽으로 끌어당겨 뽑아줄 필요가 있기 때문이다.Here, the friction force Y applied by the pushing force X of the second spring 18 and the frictional inner cylindrical portion 92 to the pen core S, and the force Z which grips the pen core of the lead chuck 61. ), The relationship between X, Y

It becomes Z. This is because it is necessary to pull the lead (S) forward from the lead chuck (61) as the slider (9) advances when the automatic writing and side knocks described later are made.

Next, the assembling of the mechanical pencil according to the present invention will be described.

First, the core delivery mechanism 6 is assembled to the inner sleeve 5, that is, the lead chucks 6 split into two are combined and combined, and then the third spring 66 is loosely fitted to the outer circumferential surface thereof.

On the other hand, the metal cylinder 64 is press-fitted in advance in the front end inner wall of the inner sleeve 5. Then, the lead chuck 61 in which the third spring 66 is loosely fitted is fitted from the rear side of the inner sleeve 5. Then, the lead chuck 61 was pressed from the rear side to compress the third spring 66 so that the ball 63 was inserted into the non-holding support portion 62 of the lead chuck 61 from the front end of the inner sleeve 5. Next, when the pressure applied to the lead chuck 61 is released, the ball 63 is securely mounted to the ball holding support 62.

Then, press the cylindrical ring (7) into the front end of the inner sleeve (5) to engage. The cylindrical ring 7 is then accommodated in the release ring 8 to compress the second spring 18 sandwiched between the release ring 8 and the rear end of the slider 9 at the rear end thereof. (7) Engage from the front end side and engage the locking projection 91 of the slider 9 with the locking recess 72 of the cylindrical ring 7.

According to such a series of assembling operations, the inner sleeve 5, the pen delivery mechanism 6, the cylindrical ring 7, the release ring 8, the second spring 18 and the slider 9 are blocked. .

Subsequently, the first spring 17 is mounted on the outer circumference thereof from the rear side of the inner sleeve 5 blocked as described above, and then the outer sleeve is pressed by pressing the stopper 19 into the friction sliding groove 51. When the (4) is inserted to engage with the stopper protrusion 191, the stopper 19 and the outer sleeve 4 in the inner sleeve 5 is blocked again.

When the front outer cylinder 1A, the knock operation unit 2, and the lever 3 are fitted with the intermediate outer cylinder 1B and the rear outer cylinder 1C screwed in, the assembly of the mechanical pencil is completed.

After the assembly is completed, the inner sleeve 5, the stopper 19, and the outer sleeve 4 are pushed back by the first and second springs 17 and 18 as shown in FIG. Since the knock operation unit 2 and the lever 3 are in the solid line position, the operation protrusion 22 of the knock operation unit 2 is exposed from the side knock operation hole 102B. do.

Next, the core delivery operation of the present invention will be described.

This heartbeat sending operation is performed in two ways as follows.

(1) First, the first means is to send the pen core (S) by side knocking in the state of holding the outer cylinder (1). That is, when the pendulum S is worn in the writing state in which the slider 9 is held at the upper half position in the first half, for example, the operation protrusion 22 of the knock operation unit 2 by the index finger without fixing the outer cylinder 1 is fixed. Is pressed against the first and second springs 17 and 18.

According to the side knock operation, the lever 3 is rotated in the direction of the arrow to push the outer sleeve 4 and the stopper 19 forward.

Here, since the friction applying projection 191a of the stopper protrusion 191 and the friction sliding groove 51 of the inner sleeve 5 are engaged with a predetermined friction force, the entire inner sleeve 5, that is, the inner sleeve 5 ) And the pen delivery mechanism (6), the one ring (7) and the release ring (8) are united to move forward, which is the front end of the cylindrical ring (7) to the inner step (101c) of the tip cap (1D) Advance until you reach it. In this way, they are integrally advanced by the distance b between the cylindrical ring 7 and the inner stairway part [01c], and this distance b becomes the core delivery amount.

And since the outer sleeve 4 and the stopper 19 are pushed forward by the lever 3 again, the friction sliding grooves 51 between the friction applying projection 191a and the inner sleeve 5 of the stopper 191 are pushed forward. Forces greater than the frictional force generated between) act to advance the stopper 19 and the outer sleeve 4. The front end portion of the lead chuck pressing cylinder portion 192 of the stopper 19 is pressed against the rear step portion 65b of the lead chuck 61, thereby being caught by the forward step portion 65a of the lead chuck 61. The lead chuck 61 is pushed forward against the elastic force of the true third spring 66.

In this way, since the pressing force in the opposite direction acts on the front stair part 65a and the rear stair part 65b formed at predetermined intervals in the process of advancing the lead chuck 61, the lead chuck 61 has a locking projection 67. With the center of support as shown in FIG. 19, the open lever operation is performed, and the state of holding the pen core (S) is opened, and this operation is repeated so that the normal pen delivery is performed.

When the operation protrusion 22 is pushed forward to release the side knock, the blocked outer sleeve 4 and the inner sleeve 5 are formed of the first spring 17 and the second spring 18. It will retreat by pushing force. When the retraction moves in this manner, since the core S is caught by the frictional inner cylindrical portion 92 of the slider 9, the third spring 66 receives the compressive force to release the grip of the lead chuck 61. As a result, the entire unit blocks of the outer sleeve 4 and the inner sleeve 5 retreat, leaving the core S bitten by the frictional inner cylindrical portion 92. Therefore, the pen core S sent out from the front end of the slider 9 by the side knock maintains the state without affecting the retreat movement of the unit block.

(2) The second means is that the handwriting transmission operation is automatically performed when the writing is stopped. That is, writing is usually performed in a state in which the pen core S is protruded by a predetermined amount from the front end of the slider 9, and when the pen core S gradually wears out with the writing, the front end of the pen core S The front end of the slider 9 is made coincident.

Even in this state, the slider 9 can retreat against the force pushed by the second spring 18, so that the slider 9 can retreat to the distance c in FIG.

However, when the amount of wear of the pen lead S by writing becomes a retraction distance c, writing for a very long time is required, that is, a pencil pencil using a pen lead having a concentration of HB and a thickness of 0.5 mm at a normal adult pen pressure. When writing a single Chinese character on good quality paper, the amount of wear of the lead (S) is only 0.01mm.

Therefore, it is almost impossible to continuously write until the slider 9 retreats by the distance c, and the writing is always stopped or stopped in the meantime.

The protruding length of the slider 9 protruding from the front end of the tip cap 1D may be set smaller than the retractable distance c. In addition, when the slider 9 stops writing in the state where the writing pressure is reduced to the retreat distance c at the writing pressure, the front end of the slider 9 is further separated from the ground. In addition to being advanced by the spring force of the spring 18, the pen core S is also pulled by a predetermined friction force applied from the frictional inner cylinder portion 92. On the other hand, since the lead chuck 61 also holds the pen core S, the lead chuck 61 moves forward with the pen core S. In this case, the lead chuck 61 moves forward to bite the pen core S. Will be released.

That is, when the lead chuck 61 is advanced, the ball 63 at its head contacts the rolling taper wall 64a of the metal barrel 64, so that the lead chuck 61 is moved forward. Accompanying the lead chuck (61) weakens the force to bite the pen core will be the operation of sending the pen core (S).

According to this series of operations, the state shown in FIG. 1 (slider 9 is located in the upper half) is returned to the automatic pen delivery operation, and writing becomes possible, and as much as the retreat distance c of the slider 9 is possible. Continuous writing is done until the core (S) is worn.

Next, an operation of fastening and storing the slider 9 of the mechanical pencil according to the present invention will be described.

When the slider 9 is pressed in front of the slider 9 to the ground or the like in the state of in-phase shown in the upper half position i in FIG. 1, the slider 9 is side-knocked. ) Retreats against the second spring 18, and the inner sleeve 4, the outer sleeve 5, and the stopper 19 move forward, so that the cylindrical head 7 moves to the tip cap 1D. It becomes a position which contacts the internal stair part 101c, In this position, the pen core sending mechanism 6 opens the pen core S. As shown in FIG. According to this operation, the locking projection 91 of the slider 9 is caught by the locking recess 72 of the cylindrical ring 7.

When the finger is released from the manipulation protrusion 22, the inner sleeve 4, the outer sleeve 5, and the stopper 19 are retracted by the elastic force of the first spring 17 and the second spring 18. In this way, since the slider 9 is accommodated in the outer cylinder 1 by the retraction operation, the slider 9 is held in a state in which it is fastened in the fully accommodated position in the tip cap 1D. And the operation of releasing the fastening state is the same as the fastening operation after assembling the mechanical pencil as described.

However, in the first embodiment, the side knock mechanism is applied to a so-called automatic mechanical pencil. Of course, the present invention can be applied not only to this but also to a conventional mechanical pencil equipped with a conventional lead chuck.

That is, in the mechanical pencil which is a frostbite chuck, when the rear end is knocked, the pen core feeding operation is performed by pressing the rear end of the pen core pipe, but the structure such that the pen core pipe is pressed by the lever 3 can be omitted. have.

As described above, according to the present invention, it is necessary to perform the rear end knock, and if the side knock operation is performed at the fingertip without fixing the writing instrument, the heartbeat can be simply sent out. On the other hand, when the pen pressure is stopped, the pen pressure can be automatically released, and the slider can be stored in the fastened state, and the unit block of the internal mechanism can be reduced, thereby reducing the number of parts. The work will be simplified and will produce a number of excellent effects.

Claims (2)

The outer cylinder 1 in which the side knock operation holes 102B are formed, and the operation protrusion 22 from the side knock operation holes 102B are attached to the outer cylinder 1 so as to be able to be operated so as to slide. Sharp operation apparatus characterized in that it comprises a knock operation unit (2) to operate the lever (3) in accordance with the operation, and the pen core feeding mechanism (6) which is pressed and moved by the lever (3) to perform the pen core feeding operation. Pencil. The outer cylinder 1 having the side knock operation holes 102B and the outer cylinder 1 are slidably attached to the outer cylinder 1 so that the operation protrusion 22 can be operated from the side knock operation holes 102B. Knock operation portion 2 to move the internal mechanism in the axial direction via the lever 3, inner sleeve 5 and stopper 19 moved in the axial direction by the knock operation portion 2, A first spring 17 for pushing the inner sleeve 5 backward, an inner sleeve 5 engaged with the stopper 19 with a predetermined frictional force, and fixed to the front end of the inner sleeve 5; Cylindrical ring (7) having a locking catch (72) for the slider engaging, the pen core sending mechanism (6), which is arranged in the inner sleeve (5) to allow forward of the pen core (S) but prevents retraction, and the inner sleeve It is arrange | positioned so that it can slide on the front of the eve 5, and is predetermined to the core S. Slider that give insight 9 and, Shah ill pencil, characterized in that with the slider 9 is a second spring 18 which kept the slide towards the front.

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