JP2019089272A - Feeding type writing instrument - Google Patents

Abstract

To provide a feeding type writing instrument capable of attaching a refill having different outer diameter dimensions of a tip without attaching additional parts such as an adapter.SOLUTION: There are provided a refill 6 having a tip 24 and an ink storage cylinder 10 and an ejection mechanism 7 in a barrel 4. The tip 24 comprises a ball 23 as a writing member, and a tip body 9 having a ball holding chamber 9a and an ink circulation hole 9b. A resilient member 13 disposed between a slide member 5 disposed in the barrel 4 and the barrel 4 resiliently ejects the slide member 5 rearward. A front inner step 5c is formed on the inner peripheral portion of the slide member 5, and a refill support portion 17a for detachably holding the rear portion of the refill 6 is provided in a projection and retraction mechanism 7. A front end slope portion 9c of the tip 24 is brought into contact with the front inner step 5c of the slide member 5. By clamping and holding the refill 6 by the front inner step 5c of the slide member 5 and a refill supporting portion 17a of the projection and retraction mechanism 7, the resilient member 13 causes the refill 6 to spring rearward.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a refill and a feeding-type writing instrument containing the same. In particular, the present invention relates to a feeding-type writing instrument capable of mounting refills having different outer diameters.

Conventionally, as a delivery type writing tool of this type, as disclosed in, for example, Patent Document 1, the refill holding portion in the writing tool main body can be used in the front-rear direction so as to correspond to two types of refills having different lengths and outer diameters. It is known that the fitting holes having different inner diameters are formed in steps.
In this patent document 1, the length and the outside of each fitting hole are provided by providing a second refill fitting hole having a small inner diameter in the back of the first refill fitting hole provided on the inner surface of the refill fixing holder. It is possible to selectively fix two types of refills with different diameters.

  However, in the structure of Patent Document 1, since the first refill fitting hole and the second refill fitting hole can not be formed at the same position in the axial direction, in the refill having the same length but only the outer diameter is different. There was a problem that it was not possible to cope.

  On the other hand, as a technique for solving this problem, for example, as disclosed by the present applicant in Patent Document 2, the adapter is detachably fitted to the rear outer surface of the cylindrical accommodating portion of the refill so that the outer diameter is reduced. There is known a technology capable of attaching different types of refills.

Japanese Utility Model No. 4-32309 JP, 2013-237189, A

However, in the structure of Patent Document 2, when replacing the attached refill with another refill having a different outer diameter, it is necessary to remove the adapter attached to the outer surface of the refill and replace it with the refill attached with another adapter. The replacement takes time and the adapter removed at the time of replacement has to be stored separately, and there is a risk of losing it.
Further, in Patent Document 1 and Patent Document 2, although different in outer diameter and length of the ink storage cylinder at the rear of the refill can be replaced, the outer diameter of the writing portion such as the tip tip fixed to the front end of the refill Were not applicable if they were different.

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide a feeding-type writing tool capable of attaching a refill having different outer diameter dimensions of a tip without attaching additional parts such as an adapter. .

The present invention
[1. Refill having a tip tip as a writing unit and an ink storage cylinder for storing a writing instrument ink composition in a shaft cylinder, and a retracting mechanism for projecting and retracting the refill from the front end opening of the shaft cylinder; A feeding-type writing instrument equipped with
The tip body has a ball as a writing member, a chip body having a ball holding chamber for holding the ball, and an ink circulation hole formed at the center of the bottom wall of the ball holding chamber; A state in which a part of the ball protrudes from the tip edge of the tip body by caulking the ball inserted into the ball holding chamber inward at the front end portion of the front end inclined portion provided on the tip body And hold it freely
A slide member formed so as to be movable back and forth relative to the barrel is disposed in the barrel, and the slide member is disposed by arranging a resilient member between the slide member and the barrel. Bounce backward,
The inner peripheral portion of the slide member is provided with a front inner step which is formed to be inclined so as to decrease in diameter in the axial direction, and a refill support portion for detachably holding a rear portion of the refill in the projection / retraction mechanism Provided,
The front end inclined portion of the tip is brought into contact with the front inner step of the slide member, and the refill is held by the front inner step of the slide member and the refill support portion of the projection / retraction mechanism. The delivery type writing instrument characterized in that the refill is resiliently ejected rearward by the resilient member via the slide member.
2. The slide member has a first side surface formed on the front outer side surface and extending along the axial direction, and a second side surface formed to project outward on the rear outer side surface,
A first hole extending in the axial direction to guide the first side surface of the slide member, and a second hole extending along the axial direction to guide the second side surface of the slide member, on the inner peripheral surface of the barrel. The feeding type writing instrument described in the above item 1, characterized in that it comprises a section.
3. The elastic force of the elastic member in a writing state in which the refill is made to project from the front end opening of the barrel is 2.0 N or more and 3.9 N or less. Feeding-type writing instrument.
4. An inner protrusion that protrudes inward is provided at the rear of the second hole portion of the barrel, and the inner protrusion and the slide member are configured to be able to abut, thereby moving the slide member to the rear. The feeding type writing instrument according to any one of the above items 1 to 3, characterized in that ".

  According to the present invention, the slide member is resiliently urged rearward by the resilient member, and the front inner step of the slide member and the front end inclined portion of the distal end tip can be brought into contact with each other. It can be held by holding with the refill support portion of the advancing and retracting mechanism, and the pen tip can be made to retract and retract without the tip end of the tip coming in contact with the inside of the front end of the barrel when writing. Furthermore, even when the refill stored in the barrel is replaced with another refill having a different tip outer diameter, writing can be performed with beautiful handwriting without lateral blurring.

  Further, according to the present invention, the tip is always in contact with the slide member, and at the time of writing, the slide member is in contact with the inner wall surface of the barrel. For this reason, even when tip tips having different outer diameters are used, the clearance between the slide member and the inner wall surface of the barrel is constant, the tip tips do not rattle, and the brush feeling is not reduced. Furthermore, although the tip is usually selected from materials considering wear resistance, machinability and corrosion resistance, the shaft cylinder and slide member have few restrictions on the material, and surface treatment such as plating and fluorine processing is performed in advance. It can also be applied to enhance the feel at the time of contact, or enhance the slipperiness at the time of appearance and retraction, and further reduce the contact noise by using at least one of the shaft cylinder and the slide member as a resin material. You can also

In addition, a first side surface formed on the front inner peripheral surface of the slide member and extending along the axial direction, and a second side surface formed to project outward on the rear outer peripheral surface are provided, and further, the shaft Providing a first hole extending in the axial direction to guide the first side surface of the slide member and a second hole extending in the axial direction to guide the second side surface of the slide member on the inner peripheral surface of the cylinder. In this case, by guiding the front and back outer surfaces of the slide member by the first hole portion and the second hole portion of the shaft cylinder, the slide member acts as a shaft when the writing pressure at the time of writing is applied to the slide member. It is possible to prevent the cylinder from being inclined with respect to the axial direction, thereby preventing the refill from being inclined.
The first hole and the second hole provided on the inner surface of the shaft cylinder and serving as a guide for the slide member may be formed directly on the inner surface of the shaft cylinder, or may be formed of separate parts and fixed, locked, screwed, etc. It may be fixed.

  Further, it is preferable to set the elastic force of the elastic member for elasticizing the slide member to 2.0 N or more and 3.9 N or less. In this case, the refill can be easily protruded from the tip of the barrel, and further, Even when a force is applied to the refill in a direction perpendicular to the axial direction during writing, the slide can support the refill without advancing. For this reason, it is possible to prevent lateral blurring of the tip of the refill at the time of writing.

Furthermore, it is preferable that an inner protrusion be provided on the inner peripheral portion of the shaft cylinder, and that the slide member abuts on the projection when the slide member is retracted. In this case, the amount of retraction of the slide member is limited. Thus, the slide member can be prevented from being detached from the barrel, and the refill attached to the slide member can be easily removed and replaced.
The inner projection provided on the inner periphery of the shaft cylinder may be formed integrally with the shaft cylinder, or a separately formed member may be integrated by press-fitting, bonding, screwing, etc. Good.

  According to the present invention, it has been possible to provide a feeding-type writing instrument capable of attaching a refill having different outer diameter dimensions of the tip without attaching additional parts such as an adapter.

FIG. 2 is a longitudinal sectional view of the delivery type writing instrument of Example 1; It is a principal part enlarged longitudinal cross-sectional view in FIG. It is an exploded view for explaining the state where a slide member is attached to a tip. FIG. 6 is an exploded view for explaining the invading mechanism of the first embodiment. It is a perspective view for demonstrating the state at the time of inserting a rod-like pin in a sliding piece. It is an expanded view of the cam groove of a rotating cam. FIG. 7A is an explanatory view showing a sliding contact state between the cam groove of the rotating cam and the cam projection of the sliding piece, and FIG. 7A shows the cam projection of the sliding piece in sliding contact with the rear of the first cam slope of the cam groove 7 (b) shows a state in which the cam projection of the sliding piece is in sliding contact with the first step of the cam groove, and FIG. 7 (c) shows the cam projection of the sliding piece FIG. 7 (d) shows a state in which the cam projection of the sliding piece is in sliding contact with the third step of the cam groove. . It is a longitudinal cross-sectional view which shows the state which extended | stretched the front-end part of the 1st ball-point pen refill from the state of FIG. It is explanatory drawing for demonstrating the state which erase | eliminates a handwriting with a delivery type writing instrument. It is explanatory drawing for demonstrating the state which accommodates a 2nd ball-point pen refill in an axial cylinder. It is a longitudinal cross-sectional view which shows the state which accommodated the 2nd ball-point pen refill in the axial cylinder. It is a longitudinal cross-sectional view which shows the state which advanced the 2nd ball-point pen refill from the state of FIG. It is a longitudinal cross-sectional view which shows the state which extended | stretched the front-end part of the 2nd ball-point pen refill from the state of FIG. It is a principal part enlarged longitudinal cross-sectional view for demonstrating the operation | movement which writes on the paper surface H in the state of FIG.

Next, the feeding-type writing instrument of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following examples.
Further, in the present embodiment, in the longitudinal direction of the barrel, the side with the ballpoint pen tip is expressed as the front, and the opposite side is expressed as the rear. Furthermore, in the axial direction of the shaft cylinder, the direction in which the ballpoint pen refill is present is expressed as inward, and the opposite side is expressed as outward.
In order to make the description easy to understand, similar members in the drawings and similar portions are denoted by the same reference numerals.

Example 1
As shown in FIGS. 1 to 9, the delivery type writing instrument 1 according to the present embodiment forms the barrel 4 by screwing the front end 3 disposed in front of the shaft main body 2, and the front end 3 A slide member 5 disposed so as to be movable back and forth in the inside, a first ball pen refill 6 (refill) disposed so as to be movable back and forth in the barrel 4 and retractable from the front end opening 5a of the slide member 5 It is comprised by the protrusion / retraction mechanism 7 arrange | positioned in the main body 4 and which hold | maintains the 1st ball-point pen refill 6 detachably, and the cap body 8 with which it mounted | worn detachably behind the axial cylinder.

  As shown in FIGS. 1 and 2, the first ballpoint pen refill 6 (refill) includes a ball holding chamber 9a provided in the chip main body 9, an ink circulation hole 9b at the center of the ball holding chamber 9a, and the ink circulation. A tungsten carbide ball 23 having a diameter of 0.5 mm is placed on the bottom wall of the ball holding chamber 9a, having an ink circulation groove (not shown) extending radially to communicate with the hole and not reaching the tip rear hole. And forming a caulking portion 9d obtained by caulking the front end of the front end inclined portion 9c inside, so that a ball-point pen is a writing portion rotatably held so that a part of the ball 23 protrudes from the tip edge of the tip body 9 The tip 24 (tip tip) is attached to the front end of the resin ink container 10 through the tip holder 11. Further, a tail plug 25 is attached to the rear end of the ink storage cylinder 10. Further, although not shown, an internal spring for always pushing the ball 23 forward is disposed behind the ball 23 at all times.

  In addition, although not shown, the microcapsules containing reversibly thermochromic microcapsule pigments are contained in the ink storage cylinder 10, and the ink viscosity at 1 rpm in an EM type rotational viscometer is 1020 mPa · s (25 ° C.), 100 rpm. The thermochromic ink having an ink viscosity of 84 mPa · s (25 ° C.) and a shear thinning index of 0.48 and a grease-like ink follower are directly accommodated at the rear end of the ink.

  When writing is performed by the first ballpoint pen refill 6, the ball 23 moves to the bottom wall side of the tip body 9 by the rotation and writing pressure of the ball 23 of the ballpoint tip 24, and the inner wall of the tip portion of the tip body 9 and the ball 23 The thermochromic ink can be discharged for writing.

As shown in FIG. 1, the shaft main body 2 is formed in a cylindrical shape, and the outer peripheral portion 12a of the front inner cylinder 12 similarly formed in a cylindrical shape from the front side is press-fixed and integrated into the front opening 2a. It is
Further, a female screw 12b is formed on the front inner periphery of the front inner cylinder 12, and an inner step 12c is formed on the rear inner periphery.

As shown in FIG. 1 to FIG. 3, the front opening 3 is formed with an inner hole 3a penetrating in the front and rear direction, and the inner hole 3a is formed with an inner step 3b at the center, and a front inner hole 3a1 (shaft cylinder The rear inner hole 3a2 is formed to have a diameter larger than that of the first hole of
A slide member 5 slidable back and forth is inserted into the inner hole 3a from the rear, and a first coil spring is formed between the inner step 3b and the rear outer step 5b formed on the outer peripheral portion of the slide member 5. 13 (elastic member) is stretched, and the slide member 5 is sprung back by the first coil spring 13.

  Furthermore, a male screw 3c is formed on the outer periphery of the rear portion of the front end 3, and by screwing the male screw 3c to the female screw 12b of the front inner cylinder 12, the front end 3 is attached to the shaft body 2. It is screwed on / off freely.

A front inner step 5c is formed in the inner peripheral portion of the slide member 5 in contact with the front end inclined portion 9c of the tip body 9 of the first ballpoint pen refill 6 and inclined inward.
The difference between the inclination angle of the front inner step 5c with respect to the axial direction and the inclination angle of the front end inclined portion 9c of the tip body 9 with respect to the axial direction is the front inner step of the front end inclined portion 9c of the tip body 9 and the slide member 5 It is preferable to form within ± 5 ° so that the gap with 5c is small and in stable contact. In the present embodiment, the inclination angle of the front end inclined portion 9c of the tip body 9 with respect to the axial direction is 17.5 °, and the inclination angle of the front inner step 5c is 15 °.

Furthermore, a stopper ring 14 formed in a ring shape and having an inner projection 14 b is press-fit into the rear inner hole 3 a 2 of the front end 3, and the inner hole 14 a of the stopper ring 14 (second cylinder And the flange 5d (second side surface) provided at the rear of the slide member 5 in sliding contact with the front inner hole 3a1 (first hole) of the front end 3 and the front of the slide member 5 The slide member 5 is formed so as to be in sliding contact with the outer peripheral surface 5e (first side surface) and configured to be in sliding contact with the slide member 5 at two front and rear points, so that when the writing pressure at the time of writing is applied to the slide member Inclination to the axial direction of the mouth 3 (shaft cylinder 4) is prevented.
Further, by configuring the inner projection 14b of the stopper ring 14 and the rear end portion 5f of the slide member 5 to abut, the backward movement of the slide member 5 is restricted and the slide member 5 is pulled out from the front end 3 To prevent that.

  In this embodiment, the elastic force at the time of attachment of the first coil spring 13 of FIG. 1 is set to 1.6 N, and the front end of the first ballpoint pen refill 6 is protruded from the front end opening of the tip 3 The elastic force at the time of writing of FIG. 7 was set to 3.5N.

Inside the rear portion of the shaft main body 2, as shown in FIG. 1 and FIG. 4, a cylindrically formed rear inner cylinder 15 which is inserted from the rear opening of the shaft main body 2 is disposed. The rear inner cylinder 15 is non-removably mounted on the shaft main body 2 by press-fitting the front end inner peripheral portion 15a of the cylinder 15 to the rear outer peripheral surface 12d of the front inner cylinder 12.
In addition, while forming the slit 15b which penetrates inside and outside and is extended to an axial direction in the side of the back inner cylinder 15, the latter-stage part 15c diameter-reduced in the rear is formed.

Inside the rear inner cylinder 15, there is disposed a cylindrically formed rotary cam 16 having an outer step 16a at the rear. Furthermore, the rear portion of the rotary cam 16 protrudes rearward from the rear opening of the rear inner cylinder 15, and a protrusion 16b formed to project outward on the rear outer side surface in the axial circumferential direction A plurality is formed so as to be evenly arranged.
Further, as shown in FIGS. 4 to 6, a cam groove 16c which penetrates the inside and the outside and is inclined with respect to the axial direction (front-rear direction) is formed on the side surface of the rotary cam 16. Then, a delivery cam slope 16d (a first cam slope 16d1 and a second cam slope 16d2) is formed at both ends of the cam groove 16c, and a length adjustment cam slope 16e is formed between two delivery cam slopes 16d. Is formed. Furthermore, a step 16f (a first step 16f1 and a second step 16f2) extending along the axial direction is formed at the boundary between the length adjustment cam slope 16e and the two delivery cam slopes 16d. . A stepped portion 16f (third stepped portion 16f3) extending along the axial direction is similarly formed at the front end portion of the first cam slope 16d1.
Further, the rotary cam 16 is arranged between the rear inner step 15 d of the rear inner cylinder 15 and the rear end of the front inner cylinder 12 so that it can rotate and can not move back and forth.

Inside the rotating cam 16 and behind the first ball pen refill 6, as shown in FIG. 1, FIG. 4 and FIG. A rod-like pin 18 is press-fitted to a hole 17 c formed on the side surface of the sliding piece 17. Thereby, the cam protrusion 18a which protrudes from the side surface of the sliding piece 17 is formed. Further, an inner projection 17a formed to project inward and a long hole 17b axially extending at both ends of the inner projection 17a are formed on the front inner periphery of the sliding piece 17; The first ball-point pen refill 6 is detachably held by the sliding piece 17 by holding the outer peripheral portion of the first ball-point pen refill 6 by the inward projection 17a serving as the refill supporting portion. The first ball-point pen refill is gripped by an appropriate force (0.5 to 1.0 N) by configuring the inward protrusion 17 a to be easily elastically deformed by the elongated hole portion 17 b.
In addition, the cam projection 18a slides loosely to the slit 15b and the cam groove 16c by loosely fitting the cam projection 18a to the slit 15b of the rear inner cylinder 15 and also fitting the cam groove 16c of the rotary cam 16 loosely. I have made it possible.

As shown in FIG. 1, the second coil spring 19 is disposed in a compressed state between the front end of the sliding piece 17 and the step 12 c of the front inner cylinder 12. The rotary cam 16 is sprung back with respect to the cylinder.
The first ballpoint pen refill 6 is used as the shaft cylinder 3 by moving the sliding piece 16 back and forth by rotating the rotating cam 16 with the rear inner cylinder 15, the rotating cam 16, the sliding piece 17 and the second coil spring 19. A projection and retraction mechanism 7 for projecting and retracting from the front end opening 3d of the

  In addition, a fixed ring 20 formed in a ring shape is press-fitted to the rear end portion 15c of the rear inner cylinder 15, and the friction body 22 formed of a thermoplastic elastomer is not removable in the rear inner hole of the rotating cam 16. It is locked.

Furthermore, the cap body 8 formed in a lid shape covering the rear of the fixing ring 20 is disposed outside the friction body 22, and the fitting ring 21 can not be detached from the inner hole 8 a of the cap body 8. The press fit is attached. The cap body 8 is detachably mounted on the rotation cam 16 by engaging the fitting ring 21 with the projection 16 b of the rotation cam 16.
When the cap body 8 is rotated, the rotation cam 16 rotates in conjunction with the cap body 8 to rotate the cap body 8 when the inner circumferential surface of the fitting ring 21 engages with the projection 16 b of the rotation cam 16. It is adjusted to have a fitting force of 5N or more.

  Here, in order to thermally discolor the handwriting written on the surface H, as shown in FIG. 9, the cap body 8 engaged with the rotating cam 16 is removed, and the first ball pen refill 6 is attached with the exposed friction body 22. The handwriting of the thermochromic ink can be heat-erased by the heat generated by pressure contact with the handwriting written on the sheet H with the feeding type writing instrument 1 in the state as described above and the rubbing.

Next, a state in which the front end portion of the first ball-point pen refill 6 is protruded from the front end opening 3d of the front end 3 (shaft cylinder 4) will be described using FIGS. 1, 7 and 8.
When the cap body 8 is rotated rightward (in the direction of the arrow in FIG. 1) from the state shown in FIG. 1, the rotating cam 16 engaged with the cap body 8 interlockedly rotates in the same right direction. The cam projection 18a (see FIG. 7A) in sliding contact with the rear of the first cam slope 16d1 of the cam groove 16c formed on the slit 15b and the rotary cam 16 resists the elastic force of the second coil spring 19 Then, it is moved forward while being in sliding contact with the slit 15b and the first cam slope 16d1.
Along with this, the sliding piece 17 moves forward together with the cam projection 18a, and the first ball pen refill 6 gripped by the sliding piece 17 also advances. Then, the slide member 5 whose front inner step 5c is in contact with the front end inclined portion 9c of the ballpoint pen tip 24 of the first ballpoint pen refill 6 simultaneously advances against the elastic force of the first coil spring 13 and Both the front end portion of the ballpoint pen tip 24 and the front end portion of the slide member 5 project from the front end opening 3d of FIG.

  When both the front end of the ballpoint pen tip 24 and the front end of the slide member 5 project from the front end opening 3d of the front end 3 of FIG. 8, as shown in FIG. It is locked to the step 16f1 connected to the first cam slope 16d1. Thus, the state in which the front end portion of the ballpoint pen tip 24 (first ballpoint pen refill 6) and the front end portion of the slide member 5 protrude from the front end opening 3d of the tip 3 is maintained. Furthermore, since the step 16f1 extends in a direction (circumferential direction) orthogonal to the axial direction, a change in rotational resistance when the cam projection 18a moves from the first cam slope 16d1 to the step 16f1 The user can recognize that the first ballpoint pen refill 6 has been fed out not only by visual observation but also by touch.

Further, when the cap body 8 is rotated leftward (in the direction of the arrow in FIG. 8) from the state of FIG. 8, the slide force 5 and the first ballpoint pen refill 6 are generated by the elastic force of the first coil spring 13 and the second coil spring 19. The sliding piece 17 is pushed rearward, and the cam projection 18a slides rearward while sliding on the first cam slope 16d1, and the first ballpoint pen refill 6 returns to the state shown in FIG.
In the state shown in FIG. 8, since the slide member 5 is resiliently urged rearward by the resilient force of the first coil spring 13 and the second coil spring 19, the sliding contact position of the cam projection 18a is the first step 16f1. After moving from the first cam slope 16d1 to the first cam slope 16d1, after the cap body 8 is released, the rotating cam 16 is rotated only by the elastic force of the first coil spring 13 and the second coil spring 19, and the first ball pen refill 6 Is configured to automatically retract to the state of FIG.

  Next, the first ball-point pen refill 6 (refill) of the feeding-type writing tool 1 is replaced with a second ball-point pen refill 60 (another refill) having a different overall length and outside diameter of the ball-point pen tip. Will be described with reference to FIGS. 1 and 7 to 14.

  The second ballpoint pen refill 60 is not shown, but like the first ballpoint pen refill 6, the ball holding chamber provided in the tip body 61, the ink circulation hole at the center of the ball holding chamber, and the ink circulation hole And an ink flow groove which does not reach the chip rear end hole, and a tungsten carbide ball 63 of φ 0.5 mm is placed on the bottom wall of the ball holding chamber, and the front end of the front end inclined portion 61a The ball pen tip 64 which becomes a writing part held rotatably so that a part of the ball 63 protrudes from the tip end of the metal ink containing cylinder 62 by Directly attached to the tip. Further, a tail plug is attached to the rear end of the ink storage cylinder 62. Furthermore, an internal spring (not shown) for always pressing the ball is disposed behind the ball 63, and the same specification as the ink used for the first ball pen refill 6 described above is provided in the ink storage cylinder 62. Houses the

The outside diameter of the tip body 61 of the ballpoint pen tip 64 is smaller than that of the ballpoint pen tip 24. Specifically, the outer diameter of the tip body 9 of the ballpoint pen tip 24 is 2.5 mm, and the outer diameter of the tip body 61 of the ballpoint pen tip 64 is 2.3 mm, so the diameter is 0.2 mm smaller. It becomes.
The inclination angle of the front end inclined portion 61a of the tip body 61 with respect to the axial direction is 15 °, which is the same as the inclination angle of 15 ° with respect to the axial direction of the front inner step 5c of the slide member 5. The front inner step 5c abuts on the entire surface, and the second ballpoint pen refill 60 (tip body 61) is supported by the slide member 5 in a stable state.

Here, from the state of FIG. 1, the tip 3 is rotated with respect to the shaft main body 2, the screwing is released, the tip 3 is removed from the shaft main 2, and the first ballpoint pen refill 6 is removed from the shaft main 2 The first ballpoint pen refill 6 can be removed from the shaft body 2 by pulling it forward.
Then, as shown in FIG. 10, the second ballpoint pen refill 60 is inserted from the rear end side into the interior of the shaft main body 2 and gripped by the inward projection 17a of the sliding piece 17, and the tip opening 3 is attached again by screwing. The second ball-point pen refill 60 is in the state of FIG.

  At this time, since the second ball-point pen refill 60 has a shorter overall length than the first ball-point pen refill 6, the tip end of the ball-point pen tip 61 is largely recessed from the front end opening 3a of the tip 3 as shown in FIG. For this reason, the cap body 8 is rotated in the right direction, and the cam protrusion 18a in sliding contact with the first cam slope 16d1 from the state of FIG. 7 (a) is made beyond the first cam slope 16d1 and the first step 16f1. Advance to the cam face 16d for adjusting the length, and further rotate the cap body 8 to advance the cam projection 18a to the state of FIG. 7 (c) slidingly contacting the rear of the second cam slope 16d2 via the second step 16f2. Thus, as shown in FIG. 12, the front end portion of the ballpoint pen tip 61 of the second ballpoint pen refill 60 can be advanced to the same position as that of the first ballpoint pen refill 6 in the retracted state.

Then, when the cap body 8 is rotated rightward (in the direction of the arrow in FIG. 12) from the state of FIG. 12, the rotating cam 16 engaged with the cap body 8 interlockedly rotates in the same right direction. The cam projection 18a slidingly contacting the rear of the second cam slope 16d2 resists the elastic force of the second coil spring 19 and moves forward while slidingly contacting the slit 15b and the second cam slope 16d2.
Along with this, the sliding piece 17 moves forward together with the cam projection 18a, and the second ball pen refill 60 gripped by the sliding piece 17 also advances. The slide member 5 whose front inner step 5c is in contact with the front end inclined portion 61a of the ball-point pen tip 61 of the second ball-point pen refill 60 also advances simultaneously against the elastic force of the first coil spring 13 and Both the front end of the ballpoint pen tip 61 and the front end of the slide member 5 are projected from the front end opening 3d of FIG.

  When both the front end of the ballpoint pen tip 61 and the front end of the slide member 5 protrude from the front end opening 3d of the tip 3 of FIG. 13 as in the case of the first ballpoint pen refill 6, the cam projection 18a It will be in the state of FIG.7 (d) latched by the 3rd step part 16f3 connected with the front end part of the 2 cam slope 16d2. Thus, the state in which the front end portion of the ballpoint pen tip 64 and the front end portion of the slide member 5 project from the front end opening 3d of the tip 3 is maintained. At this time, the user not only visually confirms that the second ball-point pen refill 60 has finished drawing out due to a change in rotational resistance when the cam projection 18a moves from the second cam slope 16d2 to the third step 16f3. It can also be recognized by touch.

Further, when the cap body 8 is rotated leftward (in the direction of the arrow in FIG. 13) from the state of FIG. 13, the slide member 5 pushed backward by the elastic force of the first coil spring 13 and the second coil spring 19; The first ballpoint pen refill 61 and the sliding piece 17 move rearward while the cam projection 18a is in sliding contact with the second cam slope 16d2, and the front end of the ballpoint pen tip 61 (second ballpoint pen refill 60) is sunk into the barrel 4 It returns to the state of FIG.
When the second ball-point pen refill 60 is to be inserted, the user is forced to immerse the second ball-point pen refill 60 due to a change in rotational resistance when the cam projection 18a moves from the second cam slope 16d2 to the second step 16f2. It can be recognized not only by visual observation but also by touch, and it is possible to prevent the second ball pen refill 60 from being excessively immersed.
Furthermore, as in the case of the first ball-point pen refill 6, in the state of FIG. 13, since the slide member 5 is sprung back by the elastic force of the first coil spring 13 and the second coil spring 19, the cam projection When the sliding position of 18a moves from the third step 16f3 to the second cam slope 16d2, the cap body 8 is rotated only by the elastic force of the first coil spring 13 and the second coil spring 19 even if the hand is released from the cap body 8 later. The cam 16 is rotated, and the second ball point refill 60 is configured to be automatically retracted to the state shown in FIG. At this time, when the sliding contact position of the cam projection 18a retracted along the second cam slope 16d2 moves from the second cam slope 16d2 to the second step 16f2, the rotating cam 16 loses its rotational force, Since it does not rotate, the ballpoint pen refill 60 does not return to the state of FIG.

Next, in the state of FIG. 13 in which the front end of the ballpoint pen tip 64 of the second ballpoint pen refill 60 protrudes from the front end opening 3a of the tip 3, the state when writing as shown in FIG.
As shown in FIG. 14, when the delivery type writing instrument 100 is held at a tilt of 30 ° with respect to the direction perpendicular to the paper surface H and writing is performed with a normal writing pressure (about 3 N), the ballpoint pen tip 64 And receives a force of about 1.5 N in the direction orthogonal to the direction (arrow P direction in FIG. 14). At this time, since the outer diameter of the ballpoint pen tip 64 is smaller than the outer diameter of the ballpoint pen tip 24 by 0.2 mm, a clearance S (0) between the inner peripheral surface of the slide member 5 and the tip body 61 of the ballpoint pen tip 6 1 mm), and a force of about 0.4 N is applied forward along the front end inclined portion 61a to the slide member 5 which is abutted by the front end inclined portion 61a of the tip body 61 and the front inner step 5c.
At this time, as in the case where the first ball-point pen refill 6 is attached, the slide member 5 is resiliently ejected by the first coil spring 13 with a resilient force of 3.5 N at the time of writing. For this reason, even if a writing pressure is applied, the slide member 5 is not advanced by the elastic force of the first coil spring 13, and the ballpoint pen tip 64 is firmly supported, and in the lateral direction (direction orthogonal to the axial direction) Writing can be continued without blurring.

  The pen pressure varies from 1N to 10N depending on the person, and the angle at which the cylinder is inclined with respect to the direction perpendicular to the writing surface at the time of writing also differs from 0 ° to 45 °, but a ballpoint pen tip The spring force of the first coil spring 13 (elastic member) is 2.0 N or more and 3.9 N in the writing state (states of FIG. 8 and FIG. 13) in which the front end of By setting the following, it is possible to suppress the rotational resistance at the time of feeding the ballpoint pen forward to make it easy to feed and to prevent the slide member 5 from moving forward at the time of writing, and as a result, to prevent the tip blurring of the tip. it can.

In the present embodiment, the drawing type writing tool which retractably stores two kinds of ball pen refills having different full length and outside diameter size of the ball pen tip is illustrated, but the side surface of the rotating cam for feeding cam slope and length adjustment If it is possible to accommodate the cam slope and the front end inclined portion of the ballpoint pen tip is configured to be able to abut on the front inner step of the slide member, three types, five types, etc. can be arbitrarily selected and implemented. It is possible.
In addition, the ink to be stored in the ink storage cylinder is not particularly limited, and oil, water, gel ink, and the like can be arbitrarily combined.

1 ... Delivery type writing instrument,
2 Axis main body 2a Front opening 2b Inner circumferential surface
3 ... tip end, 3a ... inner hole, 3a 1 ... front inner hole (first hole of shaft cylinder),
3a2 ... rear inner hole, 3b ... inner step, 3c ... male screw, 3d ... front end opening,
4 ... axial cylinder,
5: Slide member, 5a: Front end opening, 5b: Rear outer stage, 5c: Front inner stage,
5d: collar portion (second side surface), 5e: front outer peripheral surface (first side surface), 5f: rear end portion,
6 ... 1st ballpoint pen refill (refill),
7 ... Emergence mechanism,
8: Cap body, 8a: inner hole,
9: Tip body, 9a: ball holding chamber, 9b: ink flow hole, 9c: front end inclined portion,
9d ... caulking part,
10 ... Ink container,
11 ... tip holder,
12: front inner cylinder, 12a: outer peripheral portion, 12b: female screw portion,
12c: inner step, 12d: rear outer peripheral surface,
13 ... 1st coil spring (elastic member),
14: stopper ring, 14a: inner hole (second hole of shaft cylinder), 14b: inner protrusion,
15: Rear inner cylinder, 15a: Front end inner circumferential portion, 15b: Slit,
15c: rear stage, 15c: rear stage, rear inner stage 15d,
16: rotating cam, 16a: outer step, 16b: projection, 16c: cam groove,
16d ... delivery cam slope, 16d 1 ... first cam slope, 16d 2 ... second cam slope,
16e: Cam slope for adjusting the length, 16f: Step part, 16f1: First step part
16f2 ... second step, 16f 3 ... third step,
17: sliding piece, 17a: inward projection (refill support), 17b: elongated hole,
17c ... hole,
18 ... rod-like pin, 18 a ... cam projection,
19 ... 2nd coil spring,
20 ... fixed ring,
21 ... mating ring,
22 ... friction body,
23 ... ball,
24 ... Ballpoint pen tip (tip tip),
25 ... Tail plug,
60 ... 2nd ball pen refill (other refills),
61 ... tip body, 61a ... front end inclined portion, 61b ... caulking portion,
62: Ink container,
63 ... ball,
64: Ballpoint pen tip (tip tip),
100 ... Delivery type writing instrument,
H: Paper space.

Claims (4)

A refill comprising a tip, which is a writing unit, and an ink storage cylinder for storing an ink composition for writing tools, provided in a barrel, and a retracting mechanism for retracting the refill from the front end opening of the barrel. It is a feeding type writing instrument, and
The tip body has a ball as a writing member, a chip body having a ball holding chamber for holding the ball, and an ink circulation hole formed at the center of the bottom wall of the ball holding chamber; A state in which a part of the ball protrudes from the tip edge of the tip body by caulking the ball inserted into the ball holding chamber inward at the front end portion of the front end inclined portion provided on the tip body And hold it freely
A slide member formed so as to be movable back and forth relative to the barrel is disposed in the barrel, and the slide member is disposed by arranging a resilient member between the slide member and the barrel. Bounce backward,
The inner peripheral portion of the slide member is provided with a front inner step which is formed to be inclined so as to decrease in diameter in the axial direction, and a refill support portion for detachably holding a rear portion of the refill in the projection / retraction mechanism Provided,
The front end inclined portion of the tip is brought into contact with the front inner step of the slide member, and the refill is held by the front inner step of the slide member and the refill support portion of the projection / retraction mechanism. The delivery type writing instrument characterized in that the refill is resiliently ejected rearward by the resilient member via the slide member. The slide member has a first side surface formed on the front outer side surface and extending along the axial direction, and a second side surface formed to project outward on the rear outer side surface,
A first hole extending in the axial direction to guide the first side surface of the slide member, and a second hole extending along the axial direction to guide the second side surface of the slide member, on the inner peripheral surface of the barrel. The feeding type writing instrument according to claim 1, comprising: a section.   The elastic force of the elastic member in a writing state in which the refill is protruded from the front end opening of the barrel is 2.0 N or more and 3.9 N or less. Feeding type writing instrument.   An inner protrusion that protrudes inward is provided at the rear of the second hole portion of the barrel, and the inner protrusion and the slide member are configured to be able to abut, thereby moving the slide member to the rear. The feeding type writing instrument according to any one of claims 1 to 3, characterized in that

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