KR900003504B1 - Sharp pencil - Google Patents

Abstract

The mechanical pencil has a tubular body (1,7) with a writing end. A tubular lead guide (2) is received in the body for axial displacement and has a bias spring (6). The friction insert (4) is mounted to the lead guide and engages the lead to hold the two together. A chuck (5) is mounted in the body for gripping the lead against axial displacement away from the writing end. A one-way lock (9) allows the lead guide to retract into the body. It locks the lead guide against displacement toward the writing end under the bias of the spring.

Description

Automatic lead-type mechanical pencil

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

2 is a cross-sectional view taken along the line II-II of FIG.

3 is a longitudinal sectional view showing another state in the illustrated embodiment of FIG.

4 is a longitudinal sectional view showing a modification of the embodiment of FIG.

5 is a longitudinal sectional view showing yet another modification of FIG.

Figure 6 (a) (b) is a longitudinal sectional view showing another embodiment of the present invention.

7 and 8 are longitudinal cross-sectional views showing different states of the embodiment of FIG. 6 (a).

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

10 is a longitudinal sectional view showing a modification of the embodiment of FIG.

11 is a longitudinal sectional view showing yet another embodiment of the present invention.

12 is a longitudinal sectional view showing another state of the embodiment of FIG.

13 is a longitudinal sectional view showing a modification of the embodiment of FIG.

14 is a partial side longitudinal cross-sectional view showing another embodiment of the present invention.

15 is a longitudinal sectional view showing a modification of still another embodiment of the present invention.

16 is a longitudinal sectional view showing a modification of the embodiment of FIG.

17 is a longitudinal sectional view of another embodiment of the present invention.

18 is a longitudinal sectional view showing another state of the embodiment of FIG. 17;

19 is a longitudinal sectional view showing yet another embodiment of the present invention.

20 is a longitudinal sectional view showing a modification of the embodiment of FIG. 19;

Figure 21 is a longitudinal sectional view of another ton embodiment of the present invention.

FIG. 22 is an enlarged partial sectional view of a part of another embodiment of the embodiment of FIG. 21; FIG.

23 to 25 are enlarged partial sectional views of a part of different embodiments of the present invention.

26 is a longitudinal cross-sectional view of another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: outer cylinder 2: lead guide pipe

3: lead 4: lead holder

5: fastener 6: first spring

7: rear outer tube 8: retainer

9: second bowl 10: third spring

11: core retaining support 12: first bowl

13: 3rd spring 14: core storage tank

15: fourth spring 16: spring

17 magnet 18 magnetic material

19: elastic body 20: sliding body

30: ordinary member 31: tapered member

34,37: Pressure contact pipe 35,38: Pressure contact spring

39: fixed cylinder

The present invention relates to a lead-type self-pensing type mechanical pencil is to be automatically sent out by the amount of the worn lead when the lead is worn over a certain amount of writing.

The conventional lead-type self-pensing type mechanical pencil is as described in US Patent No. 4,538,934, the lead guide pipe which is pushed forward along the axial direction by the front spring while the lead holder is built, and the lead is sent out Although there is little resistance in the direction, the self-feeding type mechanical pencil is known as a pencil holding member which can be reliably held in the direction in which the core is put, but such a known mechanical pencil has only a little wear. If you stop writing and remove the front end of the lead guide pipe from the paper surface, the lead will be sent out automatically as much as the amount of lead wear.

Therefore, if the writing is frequently repeated, the position of the lead that is held by the lead holder changes each time, and since the lead holder repeats the opening and closing operation, the peripheral surface of the lead is damaged, thereby causing damage. If the core holding support is held by the core holding member, the writing has a drawback that the peripheral surface of the core is cut off and the core is retracted.

Therefore, the present invention has the object to provide a lead-type automatic delivery mechanical pencil that can solve the above-described problems, the present invention for achieving the object, it is built so as to slide freely in the axial direction in the outer cylinder The lead guide pipe has a portion which is pushed forward along the axial direction by the spring, and protrudes outward from the front end of the outer cylinder, and is installed on the lead guide pipe so as to be interlocked with the lead guide pipe to hold a normal lead. Moving the lead in the axial direction with the lead guide pipe in the axial direction, if a certain force is applied to the lead, the lead core which allows the lead to move relative in the axial direction, and the built-in inside the outer cylinder and the direction in which the lead is sent out The resistance is small and can be firmly held in the direction of the lead. In an automatic dispensing type mechanical pencil made of a locked lead holding device, etc., an extension of the lead holding device in the inner side of the outer cylinder or the lead guide pipe, the lead guide pipe, or an integral part thereof, in the outer cylinder Although the lead guide pipe is allowed to retreat due to the wear of the lead in the radial direction of the member that can be displaced, the spring guide pipe is prevented from moving forward when the lead guide pipe is removed from the writing surface. And an intermittent means and a means for releasing the intermittent means and allowing the lead guide pipe to move forward while detecting that the lead guide pipe is retracted by a certain distance.

In the mechanical pencil of the present invention having such a feature, the core retaining support is closed until a certain amount of the core is worn, so that the core is held at the same position so that the surface of the core is not damaged. When the lead is sent out, it can be held without damaging the circumferential surface of the lead, so that the holding state of the lead can be assured.

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

1 and 2 are longitudinal cross-sectional views showing an embodiment of the present invention, in which the lead core guide pipe 2 that can be slidably moved to the axial direction is fitted in the outer cylinder 1, and the lead guide pipe 2 The front end of the) is protruded from the front end of the outer cylinder (1) as known, the front end of the lead guide pipe (2) is made of an elastic body such as rubber to hold the core (3) with an appropriate tightening force (4) is built in. Then, inside the rear end of the outer cylinder (1), a fastener (5), which is one component of the lead retaining device, is inserted to allow a sliding movement in the axial direction, and the outer stair (5A) and the lead of the fastener (5) The first spring 6 is mounted between the front outer jaws 2A of the guide pipe 2 so that the outer step 2B of the lead guide pipe 2 is connected to the inner step 1A of the outer cylinder 1. In addition to the abutment, the outer end 5B of the fastener 5 is brought into contact with the front end of the spirally coupled rear outer casing 7, and is axially inward of the rear end of the lead guide pipe 2. The second tapered surface 2C narrows as it moves toward the rear, and the engaging portion 2D projecting inwardly is formed on the second tapered surface 2C on the inner surface located rearward in the axial direction. It is done. On the other hand, a cylindrical retainer 8 is fitted from the outside so as to slide in the axial direction between the front end outer jaw 5C of the fastener 5 and the front outer step 5D. Each of the plurality of support holes 8A is supported so that the second bowl 9 can be freely rotated as shown in FIG.

In addition, a third spring 10 is provided between the inner step 2E of the lead guide pipe 2 and the front end of the retainer 8, and the second bowl 9 is formed of the lead guide pipe 2. It is in contact with the front peripheral surface 5E of the second tapered surface 2C and the flat surface extending in the axial direction of the fastener 5, and a locking outer jaw 8B is installed at the rear of the retainer. The outer jaw 8B is configured to be stronger than the elasticity of the engaging portion 2D and the third spring 10 of the lead guide pipe 2 and to be engaged with a weaker force than the elasticity of the first spring 6. It is done.

The first retainer 12 is pivotally mounted to the head recess 11A of the lead retainer 11, which is a chuck that is divided into two and slightly opened. A second spring 13 having a weaker repulsive force than the first spring 6 is mounted between the rear outer stair 11B of the core retaining support 11 and the inner stair 5F of the fastener 5. 1 The bowl 12 abuts against the first tapered surface 5G, which narrows as it moves backward along the axial direction of the fastener 5, so that the resistance in the dispensing direction is retained by the retaining retainer 11. The pen core 3 is sandwiched so as to be securely held in the feeding direction while being small. A fourth spring 15 having stronger resilience than the first spring 6 is inserted between the inner stair 7A of the rear outer cylinder 7 and the outer stair 14A of the core storage tank 14 to store the core. The front outer staircase 14B of the tank 14 is brought into contact with the inner jaw 5H of the rear end of the fastener 5, and the front part of the lead storage tank 14 is provided with an inner surface of the fastener 5; A spring 16 fitted with a force stronger than the resilience force of the second spring 13 is provided.

Next will be described the operation of one embodiment according to the present invention made as described above.

When the front end of the lead guide pipe (2) and the lead core (3) is pressed against the paper surface for writing, the direction in which the lead core (3) enters is securely held by the lead holder (11), and thus retracted. Handwriting becomes possible without work. The lead guide pipe 2 is retracted by the amount that the lead core 3 is worn by writing, even if the front end of the lead core 3 and the lead guide pipe 2 is removed from the paper surface. Shot in the forward direction along the first spring 6 by the wedging action of the second bowl 9 located between the second tapered surface 2C and the front outer peripheral surface 5E of the fastener 5. Despite this, the lead guide pipe 2 does not move forward in the axial direction. When the writing is repeated repeatedly and the pen core 3 is worn out by a certain amount, the rear end of the retainer 8 comes into contact with the outer step of the front end of the fastener 5, and the locking outer jaw 8B of the retainer 8 is stopped. ) Passes over the engagement portion 2D of the lead guide pipe 2, and the second bowl 9 is spaced apart from the second tapered surface 2C of the lead guide pipe 2, as shown in FIG. It becomes the state that became. Subsequently, when the front end of the lead guide pipe 2 is removed from the paper surface in this state, the wedge action by the second bowl 9 does not occur, so that the lead guide pipe 2 is shot by the first spring 6. In this case, the pen core 3 held by the pen core holder 4 also slides inside the pen retainer 11 and moves forward.

When the front end of the retainer 8 is in contact with the front end outer jaw 5C of the fastener 5, the engaging outer end 8B of the engaging portion 2D of the lead guide pipe 2 and the retainer 8 ) The engagement is separated to the state shown in FIG. In addition, when the writings are repeated repeatedly and l pieces of lead (3) are worn out, pressing the lead storage tank (14) forward also advances the fastener (5) fitted with the elastic body (16) by frictional force. The outer stair 5A of the sphere 5 abuts on the engaging stair 1B of the outer cylinder 1, and then the front end of the pim reservoir 14 is moved forward when the pim reservoir 14 is moved forward. The first spring (6) is brought into contact with the core holding member (11) to open the core holding member (11) in a forward direction, and releases the pressure of the core storing tank (14). At the same time as the fastener 5 is retracted by the repulsive force of, the core storage tank 14 is also retracted by the fourth spring 15 to be in the state shown in FIG. 1, and then the core 3 comes out.

In addition, the engagement of the retaining outer jaw of the retainer and the lead guide pipe may be provided with elasticity by installing a plurality of grooves from the rear end of the retainer toward the axial direction as needed.

Also, instead of installing the engaging portion 2D and the engaging outer jaw 8B as shown in FIG. 1, the second tapered surface 2C behind the lead guide pipe 2 as shown in FIG. 4 is shown. In addition to the installation of the magnet 17, the magnetic body 18 is also installed outside the rear portion of the retainer 8, so that the magnetic attraction force of the magnet 17 and the magnetic body is larger than the elastic force of the third spring (10) You may have to.

Furthermore, as shown in FIG. 6, the elastic body 19 is fixed to the rear of the second tapered surface 2C of the lead guide pipe 2, and the engaging outer jaw 8B of the elastic body 19 and the retainer 8 is shown. ) May be fitted with a force slightly weaker than the resilience force of the third spring 10. In the case of the same embodiment as in the fifth embodiment, the lead guide pipe 2 is retracted and the rear end of the retainer 8 Abuts the outer staircase 5D at the front part of the fastener 5 so that the second bowl 9 is spaced apart from the second tapered surface 2C, and at the same time, the upper jaw 8B ) Slides forward.

Subsequently, when the front end of the lead guide pipe 2 is detached from the paper surface, the lead guide pipe 2 is momentarily advanced by the first spring 6, in which case the retainer 8 is caught by the outer jaw. Since 8B is engaged with the elastic body 19, it is retracted by the 3rd spring 10 a little later, and the 2nd bowl 9 comes in contact with the 2nd taper surface 2C, and 5th The state shown in the figure is returned.

In addition, in FIG. 5, the third spring 10 is not necessarily required, and the second bowl 9 is inclined to the second taper surface 2C by tilting the reiner 8 by the frictional fitting force of the elastic body. If the contact with the second tapered surface (2C), the wedge action is sufficiently made.

6 (a), 6 (b) and 7 are longitudinal cross-sectional views showing another embodiment of the present invention, in which the same parts as in the embodiment of FIG. Explain only.

At the rear of the lead guide pipe 2, a rod-shaped connecting portion 2F is installed, and the connecting portion 2F is connected to the sliding member 20 through the through hole 5J of the fastener 5. On the other hand, in the state as shown in FIG. 6 (a) in which the lead guide pipe 2 is located in the foremost direction, the front end of the sliding member 20 abuts against the rear end of the lead holding member 11 to hold the lead keeping. The member 11 is opened slightly. In addition, an inner staircase 7A is formed in the front portion of the rear outer cylinder 7 screwed to the rear portion of the outer cylinder 1, and the opening hole of the inner staircase 7A can pass only one pen core 3. In addition, the rear surface of the inner staircase 7A is formed in a funnel shape, and a preliminary core 3 is housed in the rear outer cylinder 7 behind the inner staircase 7A.

As shown in FIG. 6 (b), the eraser rubber 21 is fitted inside the rear portion of the rear outer cylinder 7 and the eraser rubber 21 is wrapped on the outer side of the rear outer cylinder 7. The cap 22 to be given is fitted.

To write with the self-feeding mechanical pencil according to the present invention configured as described above, first, the lead guide pipe 2 and the lead 3 are pressed by pressing the front end of the lead guide pipe 2 on the paper surface in the state of FIG. It is slightly retracted, so that the sliding member 20 connected to the lead guide pipe 2 is also retracted so that the rear end of the core retaining member 11 and the front end of the sliding member 20 are spaced apart. Then, the core retaining member 11 retracted in the rearward direction by the second spring 13 is also retracted so that the first bowl 12 installed in the head recess 11A of the core retaining member 11 is fastened. Press the first tapered surface 5G of the sphere 5 to move the pen core 3 with a small force forward along the axial direction while the pen core retaining member 11 is closed and in a state shown in FIG. In the rearward direction in the axial direction, the first bowl 12 located between the first tapered surface 5G of the fastener 5 and the mercury recess 11A of the lead retaining member 11 is formed. The strong force by the wedge action will hold the core (3).

The writing in this state causes the lead guide pipe 2 and the sliding member 20 to be retracted as the lead core 3 is worn out. In this case, a second side of the lead guide pipe 2 is located in the axial direction. Since the wedge action of the second bowl 9 does not occur between the tapered surface 2C and the outer peripheral surface 5 of the front portion of the fastener 5, the retainer 8 and the second bowl 9 are guide pipes. (2) together with the sliding body (20) without retraction, and when removing the front end of the lead guide pipe (2) from the paper surface, the second tapered surface (2C) and fasteners of the lead guide pipe (2) The sliding body 20 is axially spun forward by the first spring 6 due to the wedge action of the second bowl a located between the outer circumferential surface 5E of (5). It does not move forward along the direction. Therefore, even if the lead guide pipe 2 is pressed against the paper surface by writing in this state, since the lead retaining support 11 is closed, the lead lead 3 and the lead guide pipe 2 can be written without popping up. Will be. In addition, when the writing lead is repeatedly worn out by repeated writing, the rear end of the retainer 8 is brought into contact with the front stair step 5D of the fastener 5, and the engaging portion of the lead guide pipe 2 is placed. 2D passes over the locking outer jaw 8B of the retainer 8, and the second bowl 9 is spaced apart from the second tapered surface 2C of the lead guide pipe 2, and the state shown in FIG. do.

Subsequently, when the front end of the lead guide pipe 2 is detached from the paper surface, the engaging outer jaw 8B of the retainer 8 has a greater force than the resilience force of the third spring 10 to engage the portion of the lead guide pipe 2. The second bowl 9 is kept spaced apart from the second tapered surface 2C of the lead guide pipe 2 by being fitted to 2D. Therefore, the wedge action by the second bowl 9 does not occur, and the lead guide pipe 2 and the sliding body 20 are moved forward by the elastic force of the first spring 6, in this case The pen core 3 held by the holder 4 also does not have a wedge action between the first bowl 12 and the first tapered surface 5G of the fastener 5 in the forward direction, so that the pen core 3 is retained. The member 11 slides and moves forward. Then, the front end of the sliding body 20 is brought into contact with the rear end of the core retaining support 11 to open the sliding core 11 slightly while being opened to pass freely. In addition, when the sliding body 20 is slightly advanced, the retainer 8 comes into contact with the front end outer jaw 5C of the fastener 5 so that the engaging portion 2D of the lead guide pipe 2 is retained. (8) and the engagement is shaken over the outer jaw portion (8B) and the outer step (2B) of the lead guide pipe (2) abuts the inner kedan (lA) of the outer cylinder (1) Advancement of the pipe 2 and the sliding body 20 is stopped. At the same time, the retainer 8 is shot backward in the axial direction by the elastic force of the third spring 10, so that the second bowl 9 is engaged with the second tapered surface 2C of the core guide pipe 2. Abutting between the front outer peripheral surface 5E of the sphere 5 is returned to the state of FIG. 6 (a).

9 shows another embodiment according to the present invention, which is provided with a second tapered surface 5K, which is narrowed in a backward direction on the outer circumferential surface of the fastener 5, and this fastener The engaging surface 5L which protrudes outward is provided in the outer surface located back from the 2nd taper surface 5K of (5).

On the other hand, a retainer 8 which can be slidably moved in the axial direction is inserted between the inner step 2E of the lead guide pipe 2 and the inner jaw 2G of the lead guide pipe 2, and the retainer 8 Each of the second balls 9 is rotatably supported by the plurality of supporting holes of the " A third spring 10 is mounted between the rear end inner jaw 8C of the retainer 8 and the outer stair 5A of the fastener 5 so that the second bowl 9 is fastened to the fastener 5. Abuts between the second tapered surface 5K of the < RTI ID = 0.0 >) < / RTI > and the front inner surface 2H of the flat surface extending in the axial direction of the lead guide pipe 2. The rear end inner jaw 8C of the retainer 8 is located in front of the engaging portion 5L of the fastener 5, and the rear end inner jaw 8C of the retainer 8 and the fastener 6 hang. The fitting portion 5C is weaker than the repulsion force of the first spring 6 and can be engaged more strongly than the resilience force of the third spring 10.

Meanwhile, in the embodiment of FIG. 9, the writing operation is the same as that of the embodiment of FIG. 6, and when the pen core 3 is worn out according to the writing, the lead guide pipe 2 retreats on the second bowl 9 without resistance. Even if the lead guide pipe 2 is removed from the paper surface, the lead guide pipe 2 is strongly supported by the wedge action of the second taper surface 5K and the second bowl 9 of the fastener 5. As a result, the lead guide pipe 2 and the sliding member 20 do not move forward. Therefore, the writing in this state does not occur because the pen lead holder 11 is closed and the pen lead 3 and the lead guide pipe 2 are not pushed back. When the lead core 3 wears out due to repeated writing, the inner step 2E of the lead guide pipe 2 abuts against the front end of the retainer 8 so that the retainer 8 ), The rear end inner jaw 8C is allowed to engage over the engaging portion 5L of the fastener 5. Then, the lead guide pipe 2 is removed from the paper surface, and the rear end inner jaw 8C of the retainer 8 is engaged with the engaging portion 5L of the fastener 5 with a stronger force than the third spring 10. Since the second tapered surface 5K and the second bowl 9 of the fastener 5 are separated, the wedge action does not occur, and the guiding pipe 2 and the sliding body 20 are connected to the first spring 6. ) Will move forward with the core (3). When the inner jaw 2G of the lead guide pipe 2 comes into contact with the rear end inner jaw 8C of the retainer 8, the retainer 8 advances to the rear end inner jaw 8C and the fastener 5. And the engagement is released from the engagement portion 5L to return to the state of FIG.

As shown in FIG. 10, the front end cap 23 is screwed into the front portion of the outer cylinder 1, and the fastener 5 can be fitted from the front of the outer cylinder l to be mounted in the outer cylinder 1. have.

In the above embodiment, all of the connecting parts are integrally formed in the lead guide pipe, and the sliding member is fixedly mounted to the connecting part. However, these parts may be divided into more parts or integrally for functional reasons. No problem.

Figure 11 shows another embodiment of the present invention, which is the front end cap 23 is screwed to the front portion of the outer cylinder (1), the lead guide pipe (sliding in the axial direction in the tip cap 23) 2) is inserted with a margin, the lead guide pipe (2) is a built-in lead holder (4). In addition, a fastener 5 is fixedly mounted on an inner surface of the front portion of the outer cylinder 1 so that a first spring is disposed between the front outer jaw 2A of the lead guide pipe 2 and the outer stair of the fastener 5. 6) is mounted, and the rod-shaped connecting portion 2F provided at the rear portion of the lead guide pipe 2 is connected to the sliding body 20 through the through hole 5J of the fastener 5. In the fastener 5, as in the above-described embodiment, a holding device is installed in the direction in which the pen core 3 is discharged, while the resistance is small and the holder is securely held in the direction in which the pen core 3 is inserted. have.

In addition, in the portable state where the rear end of the lead retaining member 11 and the front end of the sliding member 20 come into contact with each other, the fill information retaining member 11 is moved forward in a slightly forward direction, and the sliding member 20 of the sliding member 20 is opened. The second tapered surface 20A is formed on the outer surface of the rear portion to protrude upward, and the second bowl 9 is rotatably supported by several supporting holes of the retainer 8, respectively. And the retainer 8 is fitted between the inner end of the outer casing 1C of the outer cylinder 1 and the front end of the rear outer cylinder 7 spirally coupled to the rear of the outer cylinder 1, the sliding body 20 Between the outer staircase 20B and the front end of the retainer 8, a third spring 10 having a weaker elasticity than the first spring 6 is mounted so that the second bowl 9 is made of the sliding body 20. The tapered surface 20A and the back surface inner surface 1D of the outer cylinder 1 are brought into contact with each other.

In addition, the engaging portion 20c which is located behind the second tapered surface 20A of the sliding body 20 and protrudes outward is installed, and the rear end inner jaw 8c of the retainer 8 is provided from the rear end. A plurality of cutout grooves are formed toward the front to apply elasticity so that the engaging portion 20c of the sliding member 20 and the rear end inner jaw 8c of the retainer 8 are stronger than the elasticity of the third spring 10. Yet it is configured to engage with a weaker force than the resilience of the first spring (6).

According to this embodiment, the writing is first performed in the same state as the eleventh degree, and the lead pipe 2 and the lead 3 are slightly retracted, at which time the fixed portion 2F of the lead guide pipe 2 is fixedly mounted. The sliding body 20 is also retracted so that the rear end of the core retaining member 11 and the front end of the sliding body 20 fall. Then, the lead retaining member l1, which is pushed backward by the second spring 13, is also retracted to move the lead 3 with a small force in the forward direction of the axial direction. Force will hold the core (3). When writing in this state, the lead core 3 is worn and the lead guide pipe 2 and the sliding member 20 retreat. In this case, the sliding member 20 is removed even if the front end of the lead guide pipe 2 is removed from the paper surface. The sliding body 20 is not moved forward by the wedge action of the second bowl 9 located between the second tapered surface 20A and the rear yarn surface lD of the outer cylinder 1. When the pen core 3 is sufficiently worn by repeated writing, the rear end of the retainer 8 abuts against the rear outer cylinder 7 so that the engaging portion 20c of the sliding body 20 is the second of the retainer 8. It is in the state shown in FIG. 12 away from the taper surface 20A.

Subsequently, when the front end of the lead guide pipe 2 is detached from the paper surface, the rear end inner jaw 8c of the retainer 8 is engaged with the sliding body 20 with a force stronger than that of the third spring 10. Since the second bowl 9 is kept away from the second tapered surface 20A of the sliding body 20, the wedge action by the second bowl 9 is maintained. It does not occur, and the lead guide pipe 2 and the sliding member 20 are advanced by the pushing force of the first spring 6. The retainer 8 abuts against the rear upper jaw 1c of the outer cylinder 1 so that the engaging portion 20c of the sliding body 20 passes over the rear end inner jaw 8c of the retainer 8. When the engagement is released, the state returns to the state of FIG.

FIG. 13 is a view in which the structure in which the fasteners are mounted in the embodiment shown in FIG. 11 is changed, that is, fastening between the front staircase 1E and the front rear staircase lF of the outer cylinder 1. The writing pressure spring 24 hangs between the rear end of the outer jaw 5M of the sphere 5 and the rear staircase 1F of the front of the outer cylinder 1 with a force stronger than the first spring 6 and the writing pressure. (5) is pushed forward.

In this way, in order to return the lead guide pipe 2, which has been retracted with the wear of the lead core 3, to the protruded state as shown in FIG. 13, the front end of the lead guide pipe 2 is written. Pressing with a force of more than a pressure compresses the pressure spring (24), and retracts the lead guide pipe (2), the sliding body (20), the retainer (8) and the fastener (5) to the rear end of the retainer (8) to the rear The second bowl 9 is slid when the front end of the outer cylinder 7 is brought into contact with the engaging portion 20c of the sliding body 20 over the rear end inner jaw 8c of the retainer 8. The second tapered surface 20A of the movable body 20 can be returned to the state shown in FIG. 13.

14 is a view showing another embodiment of the present invention, while the inner jaw 1G is installed on the inner surface of the rear portion of the outer cylinder 1, the rear side of the inner jaw 1G gradually widens toward the rear. The engaging part 1J which protrudes inward is formed in the inner surface which comprises the 2nd taper surface 1H, and is located behind the 2nd taper surface 1H of this outer cylinder 1. As shown in FIG. On the other hand, the retainer 8 is loosely sandwiched between the outer stair 20D and the rear end outer jaw 20E of the sliding body 20 fixedly mounted to the rear part of the lead guide pipe 2 to form a plurality of retainers 8. Each second bowl 9 is supported in the support hole so that it can be rotated.

A third spring 10 is installed between the locking outer jaw 8B of the retainer 8 and the inner stairway 7A of the rear outer cylinder 7 screwed to the rear portion of the outer cylinder 1, and the second spring 10 is installed. The bowl 9 abuts between the second tapered surface 1H of the outer cylinder 1 and the outer surface of the sliding body 20 (not shown in the drawing, but instead of the third spring, the retainer and the outer cylinder are rubbed with an elastic body). The second bowl may be brought into contact with the second tapered surface). The engaging outer jaw 8B of the retainer 8 is located in front of the engaging portion 1J of the outer cylinder 1, and the engaging outer jaw 8B of the retainer 8 and the engaging portion of the outer cylinder 1 ( 1J) is configured to be engaged with a stronger force than the resilience of the third spring 10, while weaker than the resilience of the first spring (6) to the front of the lead guide pipe (2).

In addition, the writing operation is almost the same as the embodiment shown in FIG. 11, and the writing core is worn by writing, and the sliding body 20 retreats on the second bowl 9 without resistance. In addition, even if the lead guide pipe 2 is removed from the paper surface, the sliding body 20 is strongly held by the wedge action of the first taper surface lH and the second bowl 9 of the outer cylinder 1. Since it is lose, the lead guide pipe 2 and the sliding body 20 is not advanced. Therefore, in this state, the writing is made so that the pen lead 3 and the lead guide pipe 2 are not retracted because the lead holding member 11 is closed. When the lead guide pipe 2 is fully retracted by repeating the writing, the outer step 20D of the sliding member 20 touches the front end of the retainer 8, thereby retaining the retainer 8. The retracting outer jaw 8B is retracted so that the outer cylinder 1 is engaged through the engaging portion lJ. Subsequently, when peeling the lead pipe 2 from the paper surface, the wedge action of the second taper surface lH and the second bowl 9 of the outer cylinder 1 is not made, so the lead pipe 2 and the slip Rim moving body 20 is advanced with the lead. When the rear end outer jaw 20E of the sliding body 20 comes in contact with the rear end of the retainer 8, the retainer 8 advances to engage the engaging portion lJ of the locking outer jaw 8B and the outer cylinder 1. The engagement is released to return to the state of FIG. 14.

FIG. 15 illustrates another embodiment of the present invention, in which the lead guide pipe 2 is fitted in the outer cylinder 1 so as to slide in the axial direction, and the lead guide pipe 2 includes the lead core 3. ) Has a built-in pen holder (4) for holding with an appropriate force, and the fastener (5) is mounted in the outer cylinder (1) so that the inner stair (2E) and the hook of the lead guide pipe (2) As the first spring 6 is mounted between the front ends of (5), the outer step 2B of the lead guide pipe 2 comes into contact with the inner step 1A of the outer cylinder 1, and the lead guide pipe The front end of (2) is appropriately projected from the front end opening of the outer cylinder (1).

In addition, a second tapered surface 2C is formed on the outside of the rear portion of the lead guide pipe 2 toward the rear, and protrudes outwardly to an outer surface located behind the second tapered surface 2C. While the fitting portion 2D is configured, the retainer 8 can be axially slidably moved between the outer jaw 2A of the front end guide pipe 2 and the outer stair 5A of the fastener 5. ) Is fitted to the outside, and the second bowl 9 is supported in each of the various supporting holes of the retainer 8 so as to be free to rotate. In addition, a third spring 10 is mounted between the front end of the front end guide 2A of the lead guide pipe 2 and the retainer 8, and the second bowl 9 is formed of the first guide pipe 2; It is in contact with the front part inner surface 1K which consists of 2 taper surface 2C and the flat surface extended in the axial direction of the outer cylinder 1. As shown in FIG.

A rear end inner jaw 8C is formed at the rear end of the retainer 8, so that the rear end inner jaw 8C is fitted with the engaging portion 2D formed on the outer surface of the rear portion of the lead guide pipe 2 and the third end. It is comprised so that it may become stronger than the spring force of the spring 10, and may be tasted with a weak force than the spring force of the 1st spring 6.

Meanwhile, the rear end inner jaw 8C of the retainer 8 may have elasticity by forming a plurality of cutout grooves from the rear end toward the front in the axial direction as necessary. And the back portion of the lead guide pipe (2) is provided with a rod-shaped connecting portion (2F), the connecting portion (2F) penetrates the through hole (5J) of the fastener (5) to the sliding body 20 have. Next, the core hold support window will be described.

When the fastener 5 is moved backward, the first tapered surface 5G, which is narrowed, is brought into contact with the first beam 12 installed so as to be rotated by the head recess 11A of the lead retaining member 11. In addition, between the inner step 5F of the fastener 5 and the outer step 1LB of the rear portion retaining support 1l, a second spring 13 having a weaker elasticity than the first spring 6 is provided. Since the lead guide pipe 2 is mounted at the foremost position in FIG. 15, the front end of the sliding body 20 is brought into contact with the rear end of the lead retaining member 1 so that the lead retaining member ( 11) is slightly open.

In the writing operation, as in the eleventh embodiment described above, when the lead is worn out by writing, the lead guide pipe 2 is retracted. At this time, since the second bowl 9, which is in contact with the second tapered surface 2C of the core guide pipe 2, is also shot back by the third spring 10, the front portion of the outer cylinder 1 The inner surface (lK) is retracted with the lead guide pipe (2).

Also, even if the lead guide pipe 2 is removed from the paper surface, a second bowl (2K) positioned between the second tapered surface 2C of the lead guide pipe 2 and the front inner surface 1K of the outer cylinder 1 ( The wedge action of 9) does not cause the lead pipe 2 to move forward. If the lead core 3 is worn out by repeated writing, and the lead guide pipe 2 is fully retracted, the rear end of the retainer 8 which retracts together with the lead guide pipe 2 is the outside of the fastener 5. In contact with the staircase 5A, the engaging portion 2D of the lead guide pipe 2 is engaged over the rear end inner jaw 8C of the retainer 8. Subsequently, when the peel guide pipe 2 is removed from the paper surface, the wedge action of the second taper surface 2C and the second bowl 9 of the lead guide pipe 2 is not performed, and thus the lead guide pipe 2 is removed. And the sliding body 20 is advanced with the core (3).

Then, when the front end of the retainer 8 comes into contact with the inner staircase 1L of the front part of the outer cylinder 1, the engaging portion 2D of the lead guide pipe 2 becomes the rear end inner jaw 8C of the retainer 8. In this way, the engagement between the rear end inner jaw 8C of the retainer 8 and the engaging portion 2D of the lead guide pipe 2 is released to return to the same state as the fifteenth degree.

FIG. 16 is a view in which the second tapered surface 2C and the front inner surface lK of FIG. 15 are replaced with a second tapered surface lH widened toward the rear side inside the front portion of the outer cylinder 1. In addition, the front part outer surface 2J of the flat surface extended in the axial direction is formed in the guiding pipe 2, and the engaging part which protrudes inwardly ahead of the 2nd taper surface lH of the outer cylinder 1 is formed, The second spring 10 is formed between the rear end of the retainer 8 and the outer stair 5A of the fastener 5 by forming the first 1J. 9) is configured to be in contact with the second tapered surface 1H of the outer cylinder 1 and the outer surface 2J of the front portion of the lead guide pipe 2.

17 is a view showing another embodiment of the present invention, in which the tip cap 23 made of metal is screwed into the front portion of the outer cylinder 1 so as to be axially slid in the tip can 23. As the guide pipe 2 is loosely fitted, the lead guide pipe 2 is built in the lead holder 4. The fastener 5 is fixedly attached to the front upper face 1K of the outer cylinder 1, and the outer step 5A of the front upper jaw 2A and the fastener 5 of the lead guide pipe 2 are fixed. The 1st spring 6 is attached in between.

Further, the rod-shaped connecting portion 2F provided at the rear portion of the lead guide pipe 2 is connected to the sliding member 20 through the through hole 5J of the fastener 5. In the fastener 5, as in the previous embodiment, there is provided a lead holding device which securely holds in the direction in which the pen core 3 enters while the resistance is small in the direction in which the pen core 3 is discharged. have. In addition, in the portable state where the rear end of the lead retaining member 11 and the front end of the sliding member 20 are brought into contact with each other, the lead retaining member 11 is moved forward and slightly open. In addition, the rear end tube portion 20F of the sliding body 20 is formed with an outer jaw 20G having a tapered surface whose front end is vertical and its rear end is narrowed in a backward direction, and the outer jaw 20G The rear subcommittee tube 20F having a) is formed to have elasticity by forming a plurality of cutout grooves toward the front from the rear end. On the other hand, the inside of the rear portion of the outer cylinder (1) is provided with an elastic body of rubber material 25, the outer jaw (20G) of the sliding body 20 is embedded inside the elastic body 25, this outer jaw ( 20G) is fitted so that it can be moved forward with a strong force along its axial direction and moved with a little less resistance behind.

In addition, a rear outer cylinder (7) is screwed to the rear portion of the outer cylinder (1), and a fastening ring (26) capable of sliding in the axial direction between the rear end of the elastic body (25) and the inner staircase (7A). Is loosely fitted. To write with the automatic dispensing type mechanical pencil according to the present invention configured to press the front end of the lead guide pipe (2) on the paper surface from the state shown in FIG. 17, the lead guide pipe (2) and the lead (3) This slightly retreats, at which time the rear end of the sliding member 20 fixedly attached to the connection portion 2F of the lead guide pipe 2 and the front end of the sliding member 20 and the front end of the sliding member 20 fall. . Then, the core retaining member 11 retracted backward by the second spring 13 is also retracted, and the first bowl 12 installed in the recessed portion of the head of the core retaining member 11 is connected to the fastener 5. Pressed on the first tapered surface 5G, the core retaining support 11 is closed to move the core 3 with a small force to the front, and to be held with a strong force at the rear.

When writing in this state, as the lead core 3 is worn out, the lead guide pipe 2 and the sliding member 20 retreat. Since the outer jaw 20G of the sliding body 20 is a tapered surface of its rear end in the axial direction, the inner surface of the elastic body 25 slides back without resistance.

When the front end of the lead guide pipe 2 is removed from the paper surface, the outer jaw 20G is embedded in the elastic body 25 because the front end of the outer jaw 20G of the sliding body 20 is formed in the vertical plane. You will not move forward. Therefore, even if the lead guide pipe 2 is pressed against the paper surface by writing in this state, since the lead holder 11 is closed, the lead lead 3 and the lead guide pipe 2 are not handed back. Will be able to. When the pen core 3 is repeatedly worn out by repeating the writing process, the rear cylindrical portion 20F of the sliding body 20 is inserted into the chaffing ring 26 and pressed, so that the outer jaw 20G of the sliding body 20 is pressed. It is in the state shown in FIG. 18 which deviated from this elastic body 25. FIG. Subsequently, when the front end of the lead guide pipe 2 is detached from the paper surface, the sliding member 20 in which the rear cylindrical portion 20F is narrowed by the fastening ring 26 is coupled with the lead guide pipe 2 to the first spring ( 6) is advanced by the resilience force, wherein the pen core (3) held by the pen core holder (4) also slides forward in the thread holding member (11).

When the sliding member 20 is sufficiently advanced, the front end of the sliding member 20 contacts the rear end of the core retaining member 11 to slightly advance the core retaining member 11 so that the core 3 can pass freely. It will open up so you can. In addition, when the sliding body 20 is slightly advanced, the front end of the fastening ring 26 is brought into contact with the rear end of the elastic body 25 so that the rear part tube 20F of the sliding body 20 is the fastening ring 26. 20F of the rear panel member of the sliding member 20 is opened by its elasticity so that the outer jaw 20G is penetrated into the inner surface of the elastic member 25 to return to the same state as the seventeenth degree. .

19 is a view showing another embodiment of the present invention, which has a serrated engagement portion 1M in which the front end slope is steep and the rear end slope is gentle on the inner side of the rear part of the outer cylinder 1. Is formed so that the outer jaw 20G formed in the rear part tube part 20F of the sliding body 20 is engaged with this tooth-shaped engaging part 1M.

20 is a view showing another embodiment of the present invention, in which the inner side of the rear part of the outer cylinder 1 has a tapered surface whose arm end is narrowed toward the rear side, and the inner jaw lN having the rear end is a vertical plane. It is formed.

On the other hand, in the outer surface of the rear panel tube portion 20F of the sliding body 20, a toothed engagement portion 20H is formed in which the front end slope is gentle and the rear end slope is urgent, and the rear tube section 20F is formed. From the rear end to form a plurality of notch grooves facing forward in the axial direction is configured to stretch the elasticity. Here, the toothed engaging portion 20H of the sliding body 20 is engaged with the inner jaw 1N of the outer cylinder 1.

In the above-described embodiments of FIGS. 17 to 20, the slide guide body is fixedly attached to the lead guide pipe, but similarly to the embodiment of FIGS. For this reason, it is possible to divide it again or to configure it as a whole, and even if it is formed by extending the rear part of the lead guide pipe of the outer jaw or the toothed fitting portion formed on the sliding member, there is no problem of design deformation. .

In the embodiment shown in FIG. 21, the guiding pipe 2 is loosely fitted in the outer cylinder 1 so as to slide in the axial direction, and the cylindrical member 30 is fixed to the guiding pipe 2. While being attached, the cylindrical member 30 has a built-in pen core holder 4 for holding the pen core 3 with an appropriate force. In addition, a contact step (30A) is formed in the front portion of the cylindrical member 30, the first spring (6) at the front end of the tapered member 31 fixed to the inside of the contact step (30A) and the outer cylinder (1) ) Is mounted so that the cylindrical member 30 is always pushed forward. In addition, the flat surface 30B extending flat in the axial direction is formed in the rear outer circumference along the axial direction at the contact stair 30A of the cylindrical member 30, and the flat surface 30B is supported on the back side. 30C is formed.

On the other hand, the tapered member 31 fixed to the outer cylinder 1 is formed with a tapered surface 31A that extends toward the rear side, so that the tapered surface 31A faces the flat surface 30B of the cylindrical member 30. have. And while the retainer 8 is loosely inserted between the contact stair 30A and the support stair 30C of the cylindrical member 30, the retainer 8 is installed to rotate freely. In this case, the outer circumferential surface of the retainer 8 is fitted to friction with the inner jaw 32A of the elastic body 32, such as rubber or the like, fixedly attached to the tapered member 31, so that the retainer ( 8) is pushed toward the tapered surface 31A of the tapered member 31 so that the second bowl 9 is connected to the tapered surface 31A of the tapered member 31 and the flat surface 30B of the cylindrical member 30. It will make you taste.

In addition, a pressure contact spring 35 is installed between the pressure contact pipe 34 and the support stairway 30C fitted to the flat surface 30B of the cylindrical member 30 so that the pressure contact pipe 34 has a second bowl ( 9) the wedge action of the tapered surface 31A of the second bowl 9 and the tapered member 31 is more reliably made.

The above is a description of the device for the intermittent transfer of the lead guide pipe from the automatic dispensing mechanical pencil, but the first bowl 12 and the fastener 5 and the head are mounted in the outer cylinder 1. The lead retaining support (11) consists of the second spring 13, the lead storage tank 14, and the fourth spring (15), etc. to move the lead (3) with a small resistance to the front, but strong to the rear The lead holding device, which is held by force, is assembled and put in to complete the self-feeding mechanical pencil.

In the case of such an embodiment, as the pen lead wears out, the lead guide pipe 2 retreats backward, but the cylindrical member 30 also retreats along with the lead guide pipe 2. If the front end of the lead guide pipe (2) is removed from the paper surface while the writing is stopped for a while, the cylindrical member (30) does not move forward despite being pushed forward by the first spring (6). The reason for this is that the cylindrical member 30 is moved by a small force in the rearward direction by the wedge action of the taper surface 3lA of the second bowl 9 and the tapered member 31, but it is moved forward. Is held by a strong force. At this time, even when the cylindrical member 30 is shaken and the second bowl 9 is slightly moved, the second bowl 9 is brought into contact with the tapered surface 31A by the contact spring 35 so that the wedge action is achieved. This will certainly work.

When the cylindrical member 30 is retracted by a certain amount, the contact stair 30A of the cylindrical member 30 abuts against the front end of the retainer 8 to be tilted by friction of the elastic body 32. The retainer 8 is retracted against the holding force, and accordingly, the second beam 9 installed in the retainer 8 also retracts in communication with the retainer 8 so that the second beam 9 is tapered. The wedge action is released away from the tapered surface 31A of the < RTI ID = 0.0 >), < / RTI > At this time, the pressure contact pipe 34 pushed by the pressure contact spring 35 abuts on the second bowl 9, but a force fitted by friction of the elastic body 32 is greater than the elastic force of the pressure contact spring 35. Since the second bowl 9 is not moved forward because it is strong, the cylindrical member 30 pushed forward by the first spring 6 is moved forward. The support stair 30C of the cylindrical member 30 abuts against the rear end of the retainer 8 to advance the retainer 8 against the force fitted by the friction of the elastic body 32, and if so, The second bowl 9 comes in contact with the tapered surface 31A of the tapered member 31 to return to the same state as the twenty-first degree.

On the other hand, in order to send the preliminary pendulum, the pendulum storage tank 14 may be advanced.

In the embodiment of Fig. 23, a retainer 8 on its outer side is formed with a container portion 30D having a tapered surface 30E on the rear outer surface of the cylindrical member 30 fixed to the lead guide pipe 2; The second bowl 9 is supported, and the outer jaw 36A of the elastic body 36 is friction-welded to the inner surface of the retainer 8 so that the twenty-first (9) is pressed against the tapered surface 30E. Wedge action is to occur. And the inside of the outer cylinder (1) is fixed to the fixed cylinder (39), the front of the second bowl (9) is provided with a pressure welding pipe (37) inside the fixing cylinder (39), the front end of the fixing cylinder (39) A press-contact spring 38 is inserted between the inner jaw 39A and the press-contact pipe 37 so that the press-contact spring 38 presses the second bowl 9 to the tapered surface 30E through the press-contact pipe 37. The action is made to occur more reliably, so that the lead guide pipe 2 and the cylindrical member 30, which have been retracted by writing, are blocked by the wedge action of returning to the front. When the cylindrical member 30 is retracted by a certain amount and its rear end comes in contact with the rear end inner jaw 39B of the fixed cylinder 39, the retainer 8 is opposed to the frictional pressure of the elastic body 36. 30, the wedge action of the second bowl 9 is released, and the pen core held by the pen core holder 4 is sent forward with the cylindrical member 30 advancing.

24 and 25 respectively show another embodiment of the structure to which the elastic body of the present invention is attached, and FIG. 24 shows that the elastic body 40 is fixed to the retainer 8 while the elastic body 40 is fixed to the outer jaw. 40A is fitted to rub against the inner surface 31B of the tapered member 31, and FIG. 25 is an outer cylinder 1 in which the tapered member 31 is fixed with an elastic body 41 having an inner jaw 41A. In this way, the taper member and the retainer can be fitted so as to frictionally interlock the member fixed to the taper member, and there is no problem even if the taper member and the cylindrical member are integrally formed with the outer cylinder or the lead guide pipe. .

FIG. 27 is an embodiment in which the intermittent movement device of the lead guide pipe described in FIG. 21 is used in an automatically dispensing type mechanical pencil in which a preliminary lead is automatically followed. ), The lead guide pipe (2) with the lead holder (4) in it is built so that it can slide freely in the axial direction, and the outer step (5A) of the fastener (5) fixed in the outer cylinder (1) and The first spring 6 is mounted between the front outer jaws 2A of the lead guide pipe 2, so that the lead guide pipe 2 is pushed forward and the front portion of the lead guide pipe 2 is provided. The outer jaw 2A is in contact with the locking step 23A of the tip cap 23. In addition, the rod-shaped connecting portion 2F extending on the rear side of the lead guide pipe 2 is fixedly attached to the sliding body 20 with the through hole 5J of the fastener 5.

On the other hand, the fastener (5) is installed so that the first bowl (12) is freely rotated on the head portion, at least the core retaining support is divided into several pieces each of the core retaining support (11) is built-in, The second spring 13 is mounted between the front stair 5F of the fastener 5 and the outer jaw 11B of the rear end retainer 11. However, in the same state as the twenty-sixth degree where the lead guide pime 2 is located in the most forward direction in the axial direction, the pipe 44 protruding forward from the front end of the sliding member 20 is the inner step of the lead retaining support 11. In contact with 11C), the core retaining member 11 is appropriately opened. In addition, the taper member 31 is fixed to the rear portion of the outer cylinder 1, and the sliding body 20 and the taper member 31, the second bowl 9, the retainer 8, the elastic body 32, and the pressure welding pipe 34 ) When the lead guide pipe intermittent movement device made of the butt-welding spring 35 is constructed and assembled as described in FIG. 21, the self-feeding mechanical pencil is completed.

Next, the operation of the above embodiment will be described. When the front end of the lead 3 and the lead guide pipe 2 are pressed against the sheet of paper so that writing can be performed in the state of FIG. 26, the lead guide pipe 2 and the sliding surface are pushed. The movable body 20 is retracted slightly so that the pipe 44 is separated from the core retaining body 11.

In this case, since the lead retaining member 11 is pushed to the rear by the second spring 13, the bobbin 12 installed on the head of the lead retaining member 11 is fastened. By touching the tapered surface of the core (3) will be held strongly against the back. When the writing is made in this state and the core 3 is worn out for a certain amount, the outer step 20D of the sliding body 20 reaches the front end of the retainer 8, which is exactly the same as the intermittent guide pipe of FIG. 21 described above. In operation, the second bowl 9 is separated from the tapered surface A of the tapered member 31. Therefore, the lead guide pipe 2 shot by the first spring 6 is advanced to the foremost position in the axial direction. At this time, the lead lead 3 held by the lead holder 4 is also sliding body 20. And the lead holding member 11 is opened by the pipe 44 to return to the state shown in FIG. In this state, when the core in use is shortened and the rear end of the core 3 is positioned in front of the core retaining member 11, the core in the core storage tank 14 is opened because the core retaining body 11 is opened. (3) falls into the core retaining support 11 by its own weight.

Claims (34)

The lead guide pipe (2), which has a portion in which the outer cylinder protrudes forward from the front end while being pushed forward by a spring, is built in the outer cylinder (1) to be slid freely in the axial direction, and the lead guide pipe (2) It is installed in the lead guide pipe so as to be interlocked with the lead, so that the lead is usually held in the axial direction along with the lead guide pipe, and the force is moved relatively in the axial direction when a force above a predetermined value is applied to the lead. The lead holder (4), which allows to be made, and built in the outer cylinder (1), the resistance in the direction of sending the lead is made of a lead holding device, etc. to ensure the holding in the direction that the pen core enters In the automatic dispensing type mechanical pencil, the pen holder having the inside of the outer cylinder (1) or the lead guide pipe (2) Of the spring when the lead guide pipe is detached with the wear of the lead by the writing between the extension of the branch device and the lead guide pipe 2 or a member which is integral with and can be displaced in the outer cylinder. Intermittent means for preventing the advance by the force, and the release means for detecting the retraction of the lead guide pipe by a predetermined distance to release the intermittent means to allow the advancement of the lead guide pipe, etc. Automatically dispensed mechanical pencil. According to claim 1, wherein the intermittent means is made of an annular tapered surface formed to be closer to the center of the shaft toward the back of the inlet surface of the lead lead pipe, and an extension of the lead holding member in a position facing the annular tapered surface An auto-dispensable mechanical pencil, comprising: a cylindrical surface extending along an axial direction, and a bowl held in such a manner that it does not normally escape from the wedge-shaped space formed between the tapered surface and the cylindrical surface. 3. The automatic transmission mechanical pencil according to claim 2, wherein the bowl is supported by a retainer (8) provided between the tapered surface and the cylindrical surface. 2. The inner catch portion according to claim 1, wherein said release means comprises an inner catch portion formed in the retainer (8), and an inner catch portion formed in the inside of the core guide pipe such that the retainer is pushed backward by a spring to be separated from the inner catch portion in a normal state. And an automatic discharging type sharpener comprising stop means for stopping the retainer from retracting when the lead guide pipe retracts the predetermined distance and preventing the retainer and the bowl from being displaced to the rear by engaging the both catches. Pencil. 5. The automatic dispensing mechanical pencil according to claim 4, wherein the stop means comprises a stepped portion of the core holding device member. 5. The automatic dispensing mechanical pencil according to claim 4, wherein the inner and outer locking portions have magnets on one side and magnetic bodies on the other side. [5] The mechanical dispensing pencil according to claim 4, wherein the inner and outer locking portions are made of members that are elastically in friction contact with each other. The tapered surface according to claim 1, wherein the intermittent locking means has an annular tapered surface formed closer to the shaft center portion toward the outer side of the extension portion of the lead holding device member, the inner cylindrical surface of the lead guide pipe, and the tapered surface. An automatic dispensing type mechanical pencil, characterized by consisting of a ball held so as not to escape from the wedge-shaped space formed between the inner cylindrical surface. 9. The automatic dispensing mechanical pencil according to claim 8, wherein the bowl is supported by a cylindrical retainer provided between the tapered surface and the cylindrical surface. The retaining means according to claim 1, wherein the release means includes an outer catch portion formed at the rear end of the retainer, and an extension portion of the core retaining device member so that the retainer is pushed forward by the spring and separated from the outer catch portion in a normal state. When the inner jammed portion formed on the outside and the lead guide pipe are retracted by a predetermined distance, the lead guide pipe which contacts the front end of the retainer and retracts the retainers to engage the both catches to prevent the retainer and the bowl from being displaced forward. Automatically-type mechanical pencil, characterized in that consisting of a staircase of. The tapered surface according to claim 1, wherein the intermittent locking means has an annular tapered surface formed on the outer surface of the sliding body 20 connected to the rear portion of the lead guide pipe 2 and further away from the shaft center. And a cylindrical surface extending in the axial direction facing the tapered surface, and a ball held so as not to escape from the wedge space formed between the tapered surface and the cylindrical surface. 12. The mechanically dispensing mechanical pencil of claim 11, wherein said bowl is constrained by a cylindrical retainer between the tapered and cylindrical surfaces. According to claim 1, The release means is a locking portion formed on the outer surface of the sliding member so that the retainer is pushed to the rear by the spring in the normal state and is released from the locking portion in the normal state and the lead guide pipe, And a stop means for stopping the retainer from retracting when the sliding body is retracted by a predetermined distance and engaging the both engaging portions to prevent the retainer and the bowl from being displaced to the rear. Affenschul. According to claim 1, wherein the intermittent means is a cylindrical surface forming an outer surface of the sliding body connected to the rear portion of the lead guide pipe, an annular formed so as to move away from the center of the axis toward the inner surface of the outer cylinder facing the cylindrical surface And a bore held in such a manner that the tapered surface of the sliding body is held within the wedge space formed between the cylindrical surface of the sliding body and the annular tapered surface. 15. The mechanically dispensing mechanical pencil of claim 14, wherein said bowl is constrained by a cylindrical retainer between the tapered surface and the cylindrical surface of the sliding body. The method of claim 1, wherein the release means is a locking portion formed in the retainer, the locking portion formed on the inner surface of the outer cylinder so that the retainer is pushed forward by the spring in the normal state to be separated from the locking portion, the lead guide pipe and When the sliding body is retracted by a predetermined distance, the front end of the retainer is retracted and the retainer is engaged, and the engaging portion is engaged by the step of the sliding body which prevents the retainer and the bowl from being displaced forward. Powered mechanical pencil. The tapered surface of claim 1, wherein the intermittent locking means extends in an axial direction while facing the annular tapered surface on an inner surface of the outer cylinder and an annular tapered surface formed on the outer surface of the guiding pipe away from the center of the shaft toward the rear. An automatic dispensing mechanical pencil comprising a cylindrical surface and a bowl held so as not to escape from the wedge-shaped space formed between the tapered surface and the cylindrical surface. 18. The mechanically dispensing mechanical pencil of claim 17, wherein said bowl is constrained to a cylindrical retainer between the tapered and cylindrical surfaces. The method of claim 1, wherein the release means is a locking portion formed in the retainer, the locking portion formed on the outer surface of the lead guide pipe so that the retainer is pushed back by the spring in the normal state to be separated from the locking portion, and the lead guide An automatic dispensing type mechanical pencil comprising: a stop means for stopping the retracting of the retainer when the pipe is retracted by a predetermined distance and engaging the both catches to prevent the retainer and the bowl from being displaced to the rear. The cylindrical intermittent means according to claim 1, wherein the intermittent locking means has a cylindrical surface forming an outer surface of the guiding pipe, an annular tapered surface formed to face away from the central axis toward the inner surface of the outer cylinder while facing the cylindrical surface, and these An automatic dispensing mechanical pencil comprising a bowl held so as not to escape from a wedge-shaped space formed between a cylindrical surface and an annular tapered surface. 21. The automatic dispensing mechanical pencil of claim 20, wherein said bowl is constrained by a cylindrical retainer between the tapered surface and the cylindrical surface of the guiding pipe. The method of claim 1, wherein the release means is a locking portion formed in the retainer, the locking portion formed on the inner surface of the outer cylinder so that the retainer is pushed forward by the spring in the normal state and away from the locking portion, and the lead guide pipe When the retracted by a predetermined distance, the front end of the retainer retracts the retainer and the engaging portion of the engagement by the step of the lead guide pipe to prevent the displacement of the runner and the bowl forward Mechanical pencil. According to claim 1, wherein the intermittent locking means is engaged with the cylindrical elastic body that is fixed to the inner surface and the cylindrical elastic body that is the outer surface of the rear elastic deformation portion of the sliding body fixed to the rear end of the lead guide pipe Automatically dispensing mechanical pencil, characterized in that made of wealth. 2. The release means according to claim 1, wherein the release means is engaged with the elastic deformation portion when the lead guide pipe and the sliding member have been retracted by a predetermined distance and contracted inwardly in the elastic deformation portion so that the engagement portion is moved from the cylindrical elastic body. An automatic dispensing type mechanical pencil, characterized in that it consists of a fastening order mounted so as to slide freely along the axial direction in the outer cylinder to pull out. According to claim 1, wherein the intermittent locking means is engaged with the toothed engaging portion formed on the inner surface of the outer cylinder and the outer surface of the rear end elastic deformation of the sliding body fixed to the rear end of the lead guide pipe An automatic dispensing type mechanical pencil, characterized in that it is made of a fitting portion to be fitted. 2. The release means according to claim 1, wherein the release means is engaged with the elastic deformation portion when the lead guide pipe and the sliding member are retracted by a predetermined distance so as to contract the elastic deformation portion radially inward. An automatic dispensing type mechanical pencil, characterized in that consisting of a fastening ring mounted to be freely sliding along the axial direction in the outer cylinder to pull out. The automatic dispensing type according to claim 1, wherein the intermittent locking means comprises an engaging portion formed on an inner surface of the outer cylinder and a toothed engaging portion formed on an outer side of the rear end of the sliding member fixed to the rear end of the lead guide pipe. Pencil pencil. 2. The release means according to claim 1, wherein the release means is engaged with the elastic deformation portion when the core guide pipe and the sliding member have been retracted by a predetermined distance so as to contract the elastic deformation portion radially inwardly. An automatic dispensing type mechanical pencil, characterized in that it consists of a fastening ring mounted so as to slide freely along the axial direction in the outer cylinder to be pulled out. According to claim 1, wherein the intermittent means is a cylindrical surface forming the outer surface of the cylindrical member fixed to the rear end of the lead guide pipe, and is fixed to the inner surface of the outer cylinder facing the cylindrical surface from the shaft center toward the rear A taper member having an annular tapered surface formed to be extinguished, and a bore held so as not to escape from the wedge-shaped space formed between the cylindrical surface and the annular tapered surface. 30. The roller according to claim 29, wherein the bowl is restrained by a cylindrical retainer between the tapered surface and the cylindrical surface such that a frictional engagement means is inserted between the retainer and the tapered member such that the bowl is pressed by the frictional engagement means on the tapered surface. Automatically dispensing mechanical pencil, characterized in that. 2. The automatic dispensing type according to claim 1, wherein the release means comprises a stepped portion of the cylindrical member which is engaged with the front end of the retainer and pushes the retainer backward when the lead guide pipe is retracted by a predetermined distance. Pencil pencil. According to claim 1, wherein the intermittent means is an annular tapered surface formed toward the rear toward the outer surface of the cylindrical member fixed to the rear end of the lead guide pipe toward the rear, and the inner side of the outer cylinder facing the tapered surface An automatic dispensing mechanical pencil comprising: a fixed cylinder fixed to a surface and a ball held so as not to escape from the wedge-shaped space formed between the fixed cylinder and the tapered surface. 33. The roller of claim 32, wherein the bowl is restrained by a cylindrical retainer between the tapered surface and the stationary cylinder so that a frictional engagement means is inserted between the retainer and the cylindrical member such that the bowl is pressed against the tapered surface by the frictional engagement means. Automatically dispensing mechanical pencil, characterized in that. According to claim 1, wherein said release means is an automatic delivery shaft characterized in that the step of the cylindrical member which is engaged with the front end of the fixed cylinder to press the retainer back when the lead guide pipe is retracted by a predetermined distance. A pencil.

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