KR900008079B1 - Sharp pencil - Google Patents

Abstract

The writing instrument has a refill axially slidable in an outer cylinder between retracted and projected positions. This provides a positive action to shut the chuck preventing slipping of the lead when writing with the mechanical pencil. Manual advance of lead is provided by a slider in a recession on outer surface of the sleeve that engages the lead holder allowing the chuck to be manually opened to extend lead. The instrument comprises outer cylinder (1), inserting frame (2), cam surface (61,71), slider (6,7), and first and second pencil cores (4,5).

Description

Compound writing instrument

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

변위시킨 상태의 단면도.2 is a composite writing mechanism according to the invention 90

Sectional view in the displaced state.

3 is a cross-sectional view taken along the line III-III of FIG. 1, and (b) and (c) are explanatory views of the operation of the composite writing instrument.

4 is a cross-sectional view taken along the line IV-IV of FIG.

5 is a plan view of the fitting member.

6 is a side view of the fitting member.

FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 5. FIG.

8 is a cross-sectional view taken along line X-ray of FIG.

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

* Explanation of symbols for main parts of the drawings

1: Front outer cylinder 2: Fitting member

3: rear outer cylinder 4: first core member

5: second lead member 6, 7: slider

8: clogging screw 9: creep

20: external thread 21: circular step

22: cylindrical shaft portion 23: fitting member shaft portion

24: rear stopper step 25: rotation stop projection

26: notch 27: hook shaft

27a: locking piece 28, 29: hole

30: cam locking projection 31: locking projection

32: hole 33: inner screw hole

41: lead pipe 42: lead delivery mechanism

42a: lead chuck 42b: lead external cylinder

42c: Chuck Ring 42d: Sleeve

43: guide 44: support

45: spring 51: connection holder

52: spring 60: groove

61: cam surface 61a: locking portion

62: support hole 62a: wall

70: groove 71: cam surface

71a: catching portion 73: iron needle delivery mechanism

74: lead chuck 74a: hole

75: iron needle 75a: large neck

76: rubber support 77: eraser rubber

The present invention provides, for example, a first pencil member such as a pencil pencil shaft and a pencil eraser rubber made of a knock type or a ball pen shaft and an eraser rubber shaft used for a knock ballpoint pen, and a second pencil core equipped with a knock eraser rubber. The present invention relates to a compound writing instrument having a member, and more particularly, to a compound writing instrument having a function of being provided with a slider for allowing the first and second lead members to be sunk alternately, so that the rotation can be stopped at the output position thereof.

The conventional composite pen mechanism has a fitting member attached to the front outer cylinder to slide the mechanical pencil shaft and the ball pen shaft connected to the rear end in an axial direction, and is connected to be freely rotated at the rear end of the front outer cylinder through the fitting member. The rear cylinder, which is fitted to rotate freely from the fitting member, is combined with the cam barrel to prevent axial rotation in the rear outer cylinder, and when the rear barrel is rotated, the pencil is rotated integrally with the rear outer cylinder. The axle and ballpoint pen axle were to be sunk alternately at the front end of the front barrel.

However, in the conventional composite writing device, the campen shaft and the bullpen shaft each require a separate cam barrel, so that the number of parts increases, resulting in a complex structure, which leads to a high production cost, as well as many difficulties in assembly of the parts. It had a problem that productivity was lowered because it was accompanied.

In addition, as the need for each cam is increased, the diameter of the writing cylinder becomes larger, and the size of the writing instrument becomes larger. In particular, in the conventional composite writing instrument, the rear outer cylinder rotates excessively when the rear barrel is rotated. There is a problem in that the mechanical pencil shaft and the ball pen shaft cannot be stably held at a predetermined position of indentation.

Accordingly, the present invention has been made to solve the above problems, by reducing the number of parts by eliminating the cam barrel required in the conventional composite writing mechanism to simplify the internal structure, the first core member and the knock eraser It is an object of the present invention to provide a composite writing mechanism in which the rubber-separated second lead member is smoothly moved, and of course, these lead member members can be stably and securely held in a predetermined position. .

The composite pen mechanism of the present invention for achieving the above object is connected to the fitting member is detachable at the rear end portion of the front outer cylinder while the first pencil member and the second pencil member is equipped with a knock eraser rubber on the fitting member shaft A cam surface is formed on the sliders which are attached to slide in the direction and are respectively connected to the rear end of the core member, and a cam engaging protrusion is formed on the inner circumferential surface of the rear outer cylinder to be selectively pressed and hung on each cam surface. A stopper staircase is formed at the rear end of each of the sliders to restrict the retreat movement of the slider, and the cam catching protrusion is formed at the position where the first and second lead members come out on one side and enter the other side. While being caught on one side, one side of the first and second lead members enters and the other side is Been at position a rotation stop protrusion that so hanging on the other side of the cam group obstacle is formed as a structure.

In the composite pen mechanism of the present invention configured as described above, when the rear outer cylinder is rotated in one direction, the cam engaging protrusion integrated with the rear outer cylinder presses the one-way cam surfaces of the first and second sliders to slide forward. One side of the second core member with the pen core member and the eraser rubber mounted thereon protrudes and the other direction enters, and in this state, the cam locking protrusion is caught on one side of the rotation stopping protrusion integrated with the fitting member. By further restricting one direction rotation in the outer cylinder, the first and second core members are kept in a stable position at one position while the other direction protrudes.

When the rear outer cylinder is rotated in the other direction, the cam engaging protrusion integrated with the rear outer cylinder presses the other cam surface of the first and second sliders to slide out of the first and second piling members. The cam engaging projection is caught on the other side of the rotation stopping projection while the one is inward and the other is protruding, thereby restricting the rear outer cylinder from rotating in the other direction.

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

In FIG. 1, reference numeral 1 denotes a front outer cylinder of the compound writing instrument, and is connected to the rear outer cylinder 3 in a forward / reverse direction and is detachable through a fitting member 2 at the rear end of the front outer cylinder 1. When knocked, it is possible to slide in the axial direction.

And the fitting member (2) is connected to be detachably attached to the rear end of the front outer cylinder (1), as the connecting means, the outer threaded portion 20 of the front end of the fitting member (2) inside the front outer cylinder (1) The front end of the front circular staircase 21, which has a large diameter stepped shape, which is integrally connected to the rear end of the outer threaded portion 20 while being screwed to the threaded portion 10, is in contact with the rear end of the front outer cylinder 1.

The front circular staircase 21 is formed to have an outer diameter substantially the same as the outer diameter of the front outer cylinder 1.

The fitting member 2 has a front circular staircase 21 in addition to the outer thread portion 20 and the front circular staircase 21, as shown in FIGS. 1 and 2 and 5 to 9. A small diameter stepped cylindrical shaft portion 22 which is integrally connected coaxially at the rear end is provided, and the cylindrical shaft portion 22 is formed to have an outer diameter substantially the same as that of the outer thread portion 20.

In addition, the rear end of the cylindrical shaft portion 22 is formed coaxially with the plate-shaped fitting shaft portion 23 integrally formed at the rear end of the fitting shaft 23, the large diameter stepped staircase rear stopper 24 is coaxially. It is formed integrally with the rotary stopper 25 and the notch on the outer circumferential surface of the rear stopper staircase 24 as shown in FIGS. 3A, 4, 6 and 8. (26) is formed.

The rear stopper staircase 24 has a function of restricting the retraction movement of the sliders 6 and 7 which will be described later, and rotation of the rear outer cylinder 3 by the rotation stopper 25 more than necessary. Regulating function, 3) a shaft having both of the knock eraser rubber shaft (5, the second lead member) or the first lead member (4) by the notch part 26 (the first lead body 4) Function to allow the rear knock operation of the rear outer cylinder (3) in the case of adopting the ape pencil shaft; (4) In the case of adopting the ball pen shaft as the first pencil member (4) Has a function of regulating the rear knock operation of the outer cylinder (3), and ⑤ to prevent the shaking of the rear outer cylinder (3) in the axial direction.

In addition, the rotation stopper 25 has a function of regulating the rotation of the rear outer cylinder 3 as described above, that is, the rear outer cylinder 3 as shown in FIG. (a) It rotates in one direction from the position (the arrow (a) of FIG. 3 (a)), and the mechanical pencil axis | shaft 4 used as a 1st core member protrudes, and the knock type | mold which is a 2nd core member It is engaged with one side of the cam catching projection 30 of the rear outer cylinder 3 which has been rotated at the position where the eraser rubber shaft has entered, thereby restricting the rotation of the rear outer cylinder 3 in one direction.

On the contrary, when the rear outer cylinder 3 is rotated in the other direction (the arrow (b) in FIG. 3 (b)), the mechanical pencil shaft 4 enters and the eraser rubber shaft 5 protrudes. The rear outer cylinder 3, which has been rotated in the other direction, is engaged with the other side of the cam engaging protrusion 30, so that the rotation of the rear outer cylinder 3 in the other direction is restricted.

In the present embodiment, the notch portion 26 is formed at the position where both the mechanical pencil shaft 4 and the eraser rubber shaft 5 protrude, as shown in FIGS. 3 (b) and (c). The inward locking projection 31 integrally formed on the inner peripheral surface of the rear end side of the rear outer cylinder 3 allows the locking projection 31 to move forward to a corresponding position, thereby allowing the shaft pencil 4 to move forward. When the pen core is sent out, the rear end knock of the rear outer cylinder 3 is made possible.

Accordingly, in the position where the inward locking projection 31 is displaced from the notched portion 26 by rotating the rear outer cylinder 3, the locking projection 31 abuts against the rear end of the rear stopper staircase 24. As a result, the rear outer cylinder 3 cannot be advanced and the rear end knock operation is restricted. Therefore, the rear stopper step portion 24 is prevented from shaking in the axial direction of the rear outer cylinder 3.

In addition, at the rear end of the rear stopper staircase 24, a locking shaft portion 27 having a small diameter staircase shape is integrally connected coaxially, and the locking shaft portion 27 is formed in a cylindrical shape divided into two sides. A locking piece 27a is provided at the rear end.

In addition, the front circular stepped portion 21 is formed with two sliding holes 28 and 29 passing through the outer threaded portion 20 at its axially symmetrical positions, as shown in FIGS. 1 and 7.

The sliding pencils 28 and 29 are fitted with a mechanical pencil shaft 4 (first pencil member) and an eraser rubber shaft 5, second pencil member so as to slide in the axial direction.

The mechanical pencil shaft 4 is provided with a lead pipe 41 which is fitted into one of the sliding holes 28 as shown in FIGS. 1 and 2. The lead guide 43 to which the pen core sending mechanism 42 is mounted is detachably attached to the front end.

The lead delivery mechanism 42 slides reciprocally inside the outer lead cylinder 42b while loosely wrapping the lead chuck 42a fitted to the front end of the lead guide 43 and the head of the lead chuck 42a. A chuck ring 42c that tightens the head of the chuck 42a, a sleeve 42d that fits outwardly behind the outer shell 42b to regulate the movement of the chuck ring 42c in the retracting direction, and this sleeve A chucking spring 42e (elastic body) elastically mounted between 42d and the front of the lead guide 43 is provided. In addition, a part of the outer shell 42b is caught by the inner wall of the front outer cylinder 1 according to the rear end knock of the rear outer cylinder 3, so that a normal pen core feeding operation is performed.

On the other hand, after removing the fitting member (2) from the front outer cylinder (1) and pull out the lead guide from the lead core pipe is to be able to refill the lead core.

Moreover, as shown by the dotted line in FIG. 1 at the back end of the lead pipe 41 of this mechanical pencil shaft 4, the spring support part 44 is fitted and the support hole of the slider 6 demonstrated later ( 62 is supported so as to be slidable in the axial direction, and a cushion spring 45 is mounted between the spring bearing portion 44 and the rear end wall 62a of the support hole 62, which is excessive to the core. When the writing pressure acts, the cushion spring 45 is compressed to enter the pen core pipe 41 inward to cushion the excessive writing pressure.

On the other hand, the connecting holder 51 is fitted to the rear end of the eraser rubber 5 as shown in FIGS. 1 and 2, and is supported and fixed by the support hole 72 of the slider 7 described later. It is done. And the lead chuck 74 is fitted to the front end of the connecting holder 51 is inserted into the sliding hole 29 in the other direction to be free to move the iron needle delivery mechanism 73 is fitted have.

Here, the iron needle delivery mechanism 73 is formed of the same parts as the above-described pen core delivery mechanism 42, but only the operation of transmitting the iron needle 75, 대 instead of the core lead is different, and is represented by the same reference numeral. The description is also omitted.

The iron core delivery mechanism of the iron needle delivery mechanism 73 is similarly made by knocking the rear outer cylinder 3 rearward, but the iron needle delivery mechanism 73 has a compression limit length by the rear end knock. By 52, the movement to the front direction is regulated.

As shown in FIGS. 1 and 2, the rear end of the iron needle 75 is, for example, the iron needle penetration hole 74a of the lead chuck 74 so that the entire iron needle 75 is not sent out according to the iron needle delivery operation. It is crimped and crushed so that it may become larger diameter part 75a. And the eraser rubber 77 supported by the eraser rubber support cylinder 76 is inserted in the front end of the iron needle 75, and is fixed.

As shown in FIGS. 1, 2, and 9, the sliders 6, 7 are cylindrical members divided into two sides, and are combined to form a cylindrical cross section. Axial sliding grooves 60 and 70 are formed.

These axial sliding grooves 60 and 70 are inserted up and down in the fitting member shaft portion 23 so as to surround the fitting member shaft portion 23 so that the slider (23) is used as the guide member. 6 and 7 are integral with the mechanical pencil shaft 4 and the eraser rubber shaft 5 so as to be able to slide along the axial direction, respectively. The mechanical pencil shaft 4 and the eraser rubber shaft 5 are springs 46 and 52 sandwiched between the rear ends of the circular staircases 21 of the fitting member 2 and the front ends of the sliders 6 and 7. Is always pushed in the retraction direction.

For this reason, the respective sliders 6, 7 are brought into contact with the front straps of the rear stopper staircases 24 of the fitting member shaft portion 23, and the rear end of the sliders 6, 7 is restricted from moving backward.

In the state where the fitting member 2, the mechanical pencil shaft 4, the eraser rubber 5, the sliders 6, 7, etc. are unitized in this manner, the outer thread portion 20 of the fitting member 2 is moved to the front outer cylinder ( After screwing in the inner threaded part of 1), the front end of the rear outer cylinder (3) can be rotated freely to the rear end of the front outer cylinder (1), and it is pinched to slide in the axial direction. In this case, a small diameter stepped through hole 32 formed in the rear inner side of the rear outer cylinder 3 has a front end portion of the locking piece 27a on the locking shaft portion 27 of the fitting member 2. By being pressed from the side, the locking piece 27a passes through the shaft through hole 32 and is caught by the rear end surface of the shaft through hole 32.

In this state, the blocking screw 8 is screwed into the screw hole 33 inside the rear end of the rear outer cylinder 3 so that the shaft portion 8a of the blocking screw 8 is in the shaft through-hole 32. As it is fitted, the locking piece 27a is squeezed and engaged with the shaft through hole 32.

The clogging screw 8 may also fasten the base of the creep 9 to the rear end of the rear outer cylinder 3.

In the state in which the writing instruments as a whole are assembled in this way, the sliders 6 and 7 are pushed in the retreating direction by the springs 46 and 52 of the respective systems, and the cam faces 61 formed on the outer circumferential surfaces of the respective sliders 6 and 7. 71, the face portions of the front end facing each other is pressed by the cam engaging projection 30 formed integrally with the rear outer cylinder (3) is caught.

In other words, the cam surfaces 61 and 71 have their front end portions joined together in a circumferential shape at the positions where the sliders 6 and 7 are all retracted, as shown in FIGS. 1 and 2 and 9. The tapered shapes are shorted to each other and gradually curved symmetrically toward the outside of the shaft diameter along the rear end axial direction.

In addition, as shown in FIGS. 1 and 2, the rear end portions of the cam surfaces 61 and 71 have concave groove shapes that match the front end shapes of the cam engaging projections 30, as shown in FIGS. Incision is made.

Here, in the state as shown in FIG. 1 and FIG. 2, in which the front end surfaces of the cam surfaces 61 and 71 are all caught by the cam engaging projection 30, both the sliders 6 and 7 retreat to the shaft. The ape pencil shaft 4 and the eraser rubber shaft 5 enter the front outer cylinder 1 together to maintain a stored position, and the rear outer cylinder 3 is rotated so that the cam catching protrusion 30 is rotated by the cam. In the state where the latching projection 30 is caught by either of the rear end portions 61a and 71a of the cam surfaces 61 and 71, the latched side slider 6 or 7 is advanced and the The mechanical pencil shaft 4 or the eraser rubber 5 protrudes to the front outer cylinder to maintain a state in which writing can be performed.

As the rear outer cylinder 3 is rotated in this way, the mechanical pencil shaft 4 and the eraser rubber shaft 5 are alternately moved forward and backward as well as they are all accommodated at the same time.

Next, the operation of the above embodiment will be described. When the mechanical pencil shaft 4 and the eraser rubber shaft 5 enter the front outer cylinder 1 and rotate the rear outer cylinder 3 in one direction in the same state as the first and second stored ones, The integrated cam catching projection 30 pushes and slides the cam surface 61 of the slider 6 side of the mechanical pencil shaft 4 toward the rear catching portion 61a from the front side thereof, for example. Slider 6 is advanced on spring 46.

As a result, the mechanical pencil shaft 4 integrated with the slider 6 is advanced to protrude from the front outer cylinder 1. In such a protruding position, the cam catching protrusion 30 abuts on one side of the rotation stopping protrusion 25 of the rear stopper stair part 24 so that the rear outer cylinder 3 is restricted from rotating in one direction. In addition, the inward protrusion 31 of the rear outer cylinder 3 is positioned at a position facing the notched notch 26 of the rear stopper staircase 24, so that the rear end knock of the rear outer cylinder 3 is closed. In this state, the cam catching projection 30 is caught by the rear end catching portion 61a of the cam surface 61 so that the mechanical pencil shaft 4 can be written. .

When the rear outer cylinder 3 is knocked in such a writing state, the slider 6 moves forward again through the cam engaging protrusion 30 which is engaged with the rear end engaging portion 61a of the cam surface 61. As a result, the pencil delivery of the mechanical pencil shaft 4 is performed.

In addition, when the rear outer cylinder 3 is rotated in the opposite direction in the writing state, the locking state of the cam catching protrusion 30 and the rear end catching portion 61a is released, and the cam catching protrusion 30 is the cam surface. By rotating in a direction deviating from the 61, the slider 6 is retracted by the force pushed by the spring 46, and the mechanical pencil shaft 4 enters and is stored by the retraction movement. In this storing position, the cam catching projection 30 returns to the state where the cam surface 61 is caught by the front end thereof.

In this state, when the rear outer cylinder 3 is rotated in the other direction, the cam engaging protrusion 30 this time moves the cam surface 71 of the slider 7 toward the eraser rubber shaft 5 at the rear end of the system. As the other slider 7 moves forward, the eraser rubber shaft 5 integrated with the slider 7 protrudes to the writing position by pushing and sliding toward the locking portion 71a side. . In this plunging position, the cam catching protrusion 30 abuts on the other side of the rotation stopping protrusion 25 to restrict the rotation of the rear outer cylinder 3 in the other direction and also of the rear outer cylinder 3. Since the inward engaging projection 31 faces the notched notch 26, the rear end knock can be made similarly to the mechanical pencil shaft 4 described above. By the rear end knock, the iron needle 75 performs a feeding operation like the lead of the mechanical pencil, so that the eraser rubber 77 protrudes from the front end of the front outer cylinder 1 by the required amount.

In the position where the eraser rubber 77 protrudes, the cam rubber protrusion 5 is secured to the rear end portion 71a of the cam surface 71 so that the ball pen shaft 5 is safely locked. I keep it.

In this state, when the rear outer cylinder 3 is rotated in the opposite direction, the slider 7 of the eraser rubber shaft 5 system also retreats as in the case of the mechanical pencil shaft 4 system, and the eraser rubber 77 ) Is stored.

On the other hand, in the above embodiment, as a first pen member, a sharp pen shaft that requires a knock operation may be used, but a bowl pen shaft that does not require a knock operation may be used. In this case, the inward locking protrusion 31 is located at a position where the bowl pen shaft protrudes. It is necessary to make the notch notch part 26 small so that the knot not face the notch notch part 26 so that a knock operation may become impossible.

As described above, according to the present invention, by rotating in one direction of the rear outer cylinder, one side of the first and the pen core member and the second pen member having the eraser rubber are protruded and the other is integrally formed with the rear outer cylinder. It is regulated that the rear outer cylinder rotates in one direction by contacting one side of the rotary stop projection integrated with the fitting member, and by rotating the rear outer cylinder to the other side, one side of the first and second pencil members. In the protruded and the other side, the cam engaging projection touches the other surface of the rotation stopping projection and the rear outer cylinder is restricted from rotating in the other direction. One of them can be safely held in the protruding position, and the rear outer cylinder is rotated excessively. Has an effect that can relieve the discomfort on the handwriting.

In addition, since there is no need for a separate cam barrel as in the related art, the number of parts is reduced, the internal structure is simplified, and the parts can be easily assembled, thereby improving productivity.

Claims (1)

When rotating the rear outer cylinder (3) connected to be detachable while rotating freely at the rear end of the front outer cylinder (1), the first core member (4) inserted in the front outer cylinder (1) to be slid in the axial direction ) And the second pencil member (5) in the alternating pen writing mechanism, which is connected to be detachably freely attached to the rear end of the front outer cylinder (1) while the first pencil member (4) and the knock-type agent The rear member (3) is connected to the fitting member (2) attached so as to be able to slide in the axial direction, and the rear ends of the first and second pencil members (4, 5), respectively. The first and second sliders 6 and 7 fitted to slide in the axial direction, the cam faces 61 and 71 symmetrically formed on each of these sliders 6 and 7, and the rear outer cylinder 3 The cam is formed on the inner circumferential surface of the cam when the rear outer cylinder 3 is rotated forward and reverse. The cam engaging projection 30 alternately press-bonded to 6l and 71 to alternately advance and retract the first and second lead members 4 and 5, and is formed at the rear end of the fitting member 2 so that A stopper staircase 24 for restricting the retreat movement of the sliders 6 and 7, a protrusion formed on the outer circumferential surface of the stopper staircase 24 to protrude the first core member 4 and the second core member 5. In addition, the cam catching protrusion 30 is caught on one side at the position where the cam catching protrusion 30 is inserted, and the cam catching protrusion 30 is at the position where the first lead member 4 enters and the second lead member 5 protrudes. Is equipped with a rotary stopper 25 and the eraser rubber 77 mounted on the front end of the knock type second pencil member 5 so as to be hung on the other side and protrude from the front end of the front outer cylinder 1. Composite writing instrument, characterized in that.

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