JP3346749B2 - Extension writing instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates] is a refill which is movably mounted in a barrel, the tip of the by more moved in the knock operation barrel structure having a feeding mechanism for projecting and retracting the writing unit The present invention relates to a dispensing writing instrument.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Utility Model Laid-Open Publication No. 4-89392, for example, this type of dispensing type writing instrument has a knock rod externally provided inside a rear end of a barrel. By the knocking operation of the feeding mechanism incorporated and mounted in a protruded state, by moving the refill that is loaded to be able to advance and retreat into the barrel while being biased by the resilient member to the rear of the barrel, The writing section is configured to protrude from the tip of the barrel or to be immersed in the tip. However, the rotor of the feeding mechanism, which is rotatably arranged between the rear end of the refill and the front end of the knock bar, and which can be advanced and retracted, causes the resilient member to rebound together with the refill by the knock operation of the knock bar. A writing in which the locking claws on the peripheral surface alternately engage with the claw receiving portions and protrude from the tip of the shaft cylinder by moving forward against the force or retreating by the elastic force of the same elastic member. The writing section is configured to hold the protruding state of the section, release the holding state, and immerse the writing section in the distal end.

[0003]

A rotor of a feeding mechanism which moves forward and backward by a knocking operation and rotates to make the writing portion of the refill come and go from the tip of the barrel is disclosed in Japanese Utility Model Laid-Open No. 4-89392. As shown in FIG. 2, the push rod is a short cylindrical shape which is advanced and retracted into a frame which is mounted on the rear end side of the shaft cylinder by press fitting or the like, and is rotatably contained therein. A locking claw is provided on the peripheral surface so as to be detachably engaged with the moving portion or detachably engaged with a claw receiving portion on the inner surface of the piece. Then, the refill is loaded into the shaft cylinder by abutting or shallowly fitting the rear end of the ink storage tube to the front end of the rotor, and also engaging one end with a spring stopper provided on the writing portion side. This is performed in a state where the member is directly biased to the rear of the shaft cylinder (toward the rotor). Therefore,
In the conventional knock-type writing instrument, the refill is free in the range from the rear end portion of the refill which is abutted or shallowly fitted to the rotor to the front end portion where the resilient member is loaded. Become. As a result, the ink storage tube of the refill, which is a tube, is bent and deformed by the writing pressure, and the writing portion moves into the distal end of the barrel so that the writing becomes unstable.

In a conventional knock-type writing instrument, the refill is directly loaded in the barrel while being urged rearward of the barrel by a resilient member. Is regulated. That is, in a writing instrument provided with a clip, the gripping direction in writing is generally restricted when the clip is used in a gripping state directed upward or the like, which is not gripped by hand. For this reason, conventionally, the house seat surface is worn by a transfer ball which is rotatably held by the ball house of the writing part and comes into contact with the house seat surface at the time of writing, thereby affecting the ink discharge amount and the like. was there.

Further, as described above, the refill is loaded into the shaft cylinder with the rear end of the refill being abutted or shallowly fitted to the front end of the rotor. In a writing instrument, a refilling advance / retreat stroke (extending stroke) by an extension mechanism is required on the rear end side of the barrel. To that extent, the total length of the main body including the tip of the shaft cylinder in which the writing portion appears and disappears is longer than the length of the refill.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances as described above, and the object thereof is to refill by ink pressure, in particular, the ink accommodating tube formed of a tube is bent, and the writing portion is formed of a shaft cylinder. The refill can be protected by the rotor so that it does not get into the tip, and the refill can be rotated together with the rotor to prevent the loss of writing due to the wear of the writing portion. An object of the present invention is to provide a dispensing writing instrument that can reduce the entire length of the main body from the front end to the rear end of the barrel without changing the length.

[0007]

To accomplish the object, according to achieve above-mentioned object, in the feeding type writing instrument configurations having a feeding mechanism for more knocking operation, and infested the writing portion of the refill from the tip of the barrel A piece which is non-rotatably mountable inside the rear end side of the barrel has a claw receiving portion, and a clip is integrally formed at a portion exposed from the barrel, and is engaged with the claw receiving portion. A rotor having a locking claw that is removably engaged has a long cylindrical shape having a length at least reaching the vicinity of the distal end side of the shaft cylinder, and has a refill fitting hole formed over the entire length of the rotor. That is. Further, the refill removal preventing portion is provided at several places on the inner peripheral surface of the refill fitting hole, and a resilient member is mounted on the tip side of the rotor, and the rotor is urged rearward of the shaft cylinder. That is. Further, the tip of the rotor abuts against one end of the resilient member, and is located in the range of the gripping portion of the barrel to which the grip is attached. Further, a rotor insertion hole is provided from the front end to the rear end side of the knock bar, an insertion cylinder portion is provided in the rotor, and the insertion cylinder portion is rotatably inserted into the rotor insertion hole. The refill fitting hole is extended and opened inside the cylindrical portion.

[0008]

Embodiments of the present invention will be described with reference to the drawings. The drawings show a knock-type ballpoint pen as an example of an embodiment of the present writing-out writing instrument, 1 is a barrel,
Reference numeral 2 denotes a refill which is loaded into the barrel 1 so as to be able to advance and retreat, and 3 denotes a feeding mechanism which is incorporated into the rear end of the barrel 1 with the knock bar 3-1 protruding. By performing the knocking operation of the feeding mechanism 3, the refill 2 is moved from the loaded state in the barrel 1 to the front of the barrel 1, and a resilient member 4 composed of a coil spring is formed.
The writing portion 2-1 is made to protrude from the leading end 5 of the barrel 1 by repelling against the resilience of the shaft member 1, and the refill 2 is retracted to the loaded state by the resilience of the resilient member 4. The writing unit 2-1 is configured to be immersed in the front opening 5.

The barrel 1 is formed of a transparent synthetic resin material or the like, and a grip made of an appropriate non-slip material such as silicon rubber is provided on a grip portion 1-1 on the tip side which is formed to be slightly thinner than other portions. 6 and the front end 5 of the gripping portion 1-1 is screwed into the front end 5 made of a synthetic resin material or a metal material, so that the grip 6 is attached to the gripping portion 1-1. It is formed so that it can be fixed and held so that it cannot be pulled out.

Further, the inner diameter of the front end side of the shaft cylinder 1 in the range of the gripping portion 1-1 is changed to the outer diameter of the refill 2 (the ink storage tube 2-2).
Outer diameter), and the inner diameter at the rear end side is made larger by one turn so that the stepped boundary between the front and rear holes is hooked to the other end (front end) of the resilient member 4. The spring retaining portion 7 is provided. Then, the inner surface cross-sectional shape (transverse shape) from the gripping portion 1-1 to the rear end side of the barrel 1 is formed in a rectangular tubular shape (square tubular shape in the figure) such as a substantially triangular, quadrangular, pentagonal, hexagonal or the like. (See FIG. 6). As described above, since the rectangular cylindrical portion 1-2 is formed from a transparent synthetic resin material, the rectangular cylindrical portion 1-2 is formed.
Has a convex lens effect, and an aesthetic effect (decorative effect) can be obtained in appearance.

Further, the inner surface shape from the rear portion of the rectangular tube portion 1-2 of the shaft tube 1 to the rear end opening of the shaft tube 1 is formed in a cylindrical shape having substantially the same diameter as the outer diameter of the later-described piece 8. An annular protrusion 9 is formed on the inner surface of the cylindrical portion, and when the piece 8 is assembled by press-fitting, the annular protrusion 10 formed on the outer surface of the piece 8 is fixed to the annular protrusion 9. Is formed so that the bridge body 8 is mounted in a state in which it is immovable in the axial direction and non-rotatably.

Writing section 2-1 made of metal or the like of refill 2
In the ball house 11, a transfer ball 12 which rotates in contact with the house seat surface 11-1 during writing is rotatably held (see FIG. 7). Although not shown, the transfer ball
Numeral 12 is urged forward by a coil spring or the like as needed, so as to closely contact the inward tip edge 11-2 of the tip of the writing portion 2-1 to close (close) the ink transfer port at the tip. It has become. The ink accommodating tube 2-2 formed of a tube or the like of the refill 2 is filled with an aqueous ink such as a shear-thinning ink and an ink follower composed of grease or the like that follows the consumption of the ink.

The feeding mechanism 3 has a knock rod 3 which is incorporated so as to be able to slide forward and backward while projecting from the rear end opening of the barrel 1.
1, a rotor 3-2 which is removably and rotatably incorporated therein, and a pawl receiving portion 3 which releasably engages a later-described locking claw 13 on the peripheral surface of the rotor 3-2. -3.
However, by performing the knocking operation to push the knock bar 3-1,
By advancing the rotor 3-2 toward the front of the barrel 1 against the elastic force of the elastic member 4, the locking claws 13 on the peripheral surface of the rotor 3-2 are provided.
Is released from a claw sliding groove 15 described later of the claw receiving portion 3-3, and the rotor 3-2 is rotated so that the locking claw 13 is engaged with an engagement edge 14 described later of the claw receiving portion 3-3. 5B and 9B, and by rotating the rotor 3-2, the locking claws 13 on the peripheral surface of the rotor 3-2 are brought into contact with the claw receiving portions. 3-3 is automatically disengaged from the engaging edge 14 (the engagement state with respect to the engaging edge 14 is released), and the resilient force of the resilient member 4 again causes the claw sliding groove of the claw receiving portion 3-3. 15 (Fig. 5
(A) and FIG. 9 (a)).

When a knocking operation of pushing the knock bar 3-1 against the resilient member 4 is performed, the claw receiving portion 3-3 receives the knock bar 3--3.
The rotor 3-2, which is pushed forward by 1 and is forwarded, receives the locking claw 13 on the peripheral surface in cooperation with the resilient member 4, thereby holding the rotor 3-2 at its forward limit. That is, the writing unit 2-1 of the refill 2
And has a role of holding the writing portion 2-1 immersed in the front end 5 of the barrel 1 in the front end 5 thereof. . This claw receiving part 3-3
A saw is formed on a front end opening side of a cylindrical piece 8 (hereinafter referred to as a piece with a clip) integrally formed with the clip 16 with an outer diameter fixed inside the rear end cylindrical portion of the barrel 1 by press-fitting. In addition to providing the engaging edges 14 continuously inclined in a blade shape, each engaging edge 14 is provided.
The claw sliding groove 15 is formed from the other inclined lower end toward the rear of the cylinder (see FIG. 9).

The engaging edge 14 engages the locking claw 13 of the rotor 3-2 with its inclined lower end to receive the rotor 3-2 at its forward limit. The body 8 is engraved in a saw blade shape at an appropriate inclination angle around the entire opening edge of the front end. On the other hand, the claw sliding groove 15 is used to guide the knock bar 3-1 and the rotor 3-2 to the forward limit in a non-rotatable state, and to guide the knock bar 3-1 and the rotor 3-2 when returning from the forward limit to the original rear end limit. The rotation stop 17 of the rod 3-1 and the locking claw 13 on the peripheral surface of the rotor 3-2 are internally slid.
Of these, a notch is formed at an appropriate depth from the lower end of the slope to the rear of the cylinder every other circumferential direction.

The knock bar 3-1 is formed to a required length having an outer diameter substantially the same as the inner diameter of a hole penetrating before and after the clip-equipped piece 8, and has a clip-equipped piece on its outer peripheral surface on the front end side. 8
The detent 17 for slidably engaging all or any of the claw sliding grooves 15 of the claw receiving portion 3-3 is provided at several places (see FIGS. 4 and 8), and a claw guide push is provided on the front edge thereof. Moving part
Further, a rotor insertion hole 19 for rotatably inserting an insertion cylindrical portion 3-20 of the rotor 3-2, which will be described later, is provided in the shaft core.

The pawl guide pusher 18 is provided with the locking pawl 13 of the rotor 3-2.
The knocking operation of the knock bar 3-1 is performed from the claw sliding groove 15 of the claw receiving portion 3-3 to the adjacent engaging edge 14 and from the engaging edge 14 to the adjacent claw sliding groove 15. Repeatedly guides intermittently. In other words, the role of intermittently rotating the rotor 3-2, and pushing the locking claw 13 engaging with the claw sliding groove 15 in the groove direction so as to disengage from the claw sliding groove 15, The engaging edge 14 is disengaged from the engaging edge 14
And serves to push the locking claw 13 so as to be disengaged therefrom, and is formed by engraving at an appropriate inclination angle along the entire circumference of the end of the knock bar 3-1 at an appropriate inclination angle.

The rotor insertion hole 19 is provided in the insertion cylinder portion of the rotor 3-2.
The 3-20 is inserted so as to be rotatable and has the same length as the length of the knock rod 3-1.The inner diameter is the same as or slightly larger than the outer diameter of the insertion cylinder 3-20. Opened from the front end of the knock rod 3-1 to the rear end, the insertion cylinder 3-
20 is formed so as to be rotatably inserted therein.

The rotator 3-2 is advanced toward the front of the barrel 1 against the resilient member 4 by the knocking operation of the knock bar 3-1. When the pawl 13 is engaged with the engaging edge 14 of the pawl receiving portion 3-3, the writing portion 2-1 is received.
The refill 2 is held at the limit of forward movement of the shaft 1 from the front end 5 thereof, and the locking claw 13 received by the engaging edge 14 is disengaged from the engaging edge 14. With the engagement edge
By rotating in the direction of the adjacent claw sliding groove 15 from 14 and sliding inside the claw sliding groove 15 again, the reciprocating force is exerted by the resilient member 4 and the refill 2 is returned to the initial loading position. Make a retreat. The rotor 3-2 is formed of a transparent synthetic resin material, and the front cylindrical portion 3-21 is formed from a portion where the locking claw 13 protrudes from the claw receiving portion 3-3. Shaft barrel 1
Of the knocking bar 3-1 from the protruding portion of the locking claw 13 to the rear end side. Forming a long cylindrical shape by forming an insertion cylindrical portion (rear cylindrical portion) 3-20 to be inserted into the hole 19,
A refill fitting hole 20 is formed in the shaft core over the entire length.

The front side cylindrical portion 3-21 of the rotor 3-2 extends from a portion excluding a front end side to abut one end (rear end) of the resilient member 4 to a portion where the locking claw 13 projects. It is formed into a large-diameter cylinder (thick cylinder) whose diameter is substantially the same as the inner diameter of the shaft cylinder 1 (FIG. 1).
And FIG. 6). The locking claw 13 is always engaged with the claw guide pushing / moving portion 18 of the knock bar 3-1. The knocking operation of the knock bar 3-1 causes the engaging claw 13 to engage with the engaging edge 14 of the claw receiving portion 3-3. This is alternately engaged with the claw sliding groove 15 (FIGS. 5 and 9).
reference).

The refill fitting hole 20 is for inserting the ink storage tube 2-2 of the refill 2 except for the writing portion 2-1 side, and has the same diameter as the outer diameter of the ink storage tube 2-2. A slightly larger inner diameter is provided at the shaft center over the entire length from the front end of the front cylinder portion 3-21 of the rotor 3-2 to the rear end side of the insertion cylinder portion 3-20.

The refill fitting hole 20 in the insertion cylinder 3-20 is also provided.
Refill prevention parts 21 are provided at several places (two places in the figure)
Is provided (see FIG. 3), and the refill retaining portion is provided.
21 allows the rear end side of the ink storage tube 2-2 to be held coaxially in a state where it cannot be pulled out by two-point support.
That is, the refill 2 is integrated with the rotor 3-2, and the refill 2 is also biased rearward along with the rotor 3-2 biased rearward by the resilient member 4 to the shaft cylinder 1. The refill 2 is stored and held at the original loading position in the cylinder 1,
And it rotates with the rotor 3-2. In the figure, reference numeral 22 denotes an air exchange hole formed at the rear end of the insertion cylinder 3-20 of the rotor 3-2.

According to the knock-type ball-point pen of the present embodiment configured as described above, the refill 2 is locked while being urged rearward of the barrel 1 by the resilient member 4. The claw 13 is pushed by the claw guide pushing part 18 of the knock bar 3-1 and the claw receiving part 3-3.
The ink storage tube 2-2 is inserted into and held in the refill fitting hole 20 of the rotor 3-2 provided in the shaft cylinder 1 in a state of being detachably engaged with the shaft cylinder 1. Will be loaded. That is, the rotor
Since the refill 2 can be loaded into the shaft cylinder 1 with the ink storage tube 2-2 protected by 3-2, the ink storage tube 2-2 is bent by writing pressure during writing. I can't wait. Also, without changing the length L ₁ of the refill 2 itself, the knock bar 3 at the rear end of the barrel 1 is moved from the front end 5 at the tip of the barrel 1.
1, the length L of the entire main body A can be reduced. That is, the refill 2 is provided with the insertion cylinder portion 3 of the rotor 3-2 over the entire length of the rotor insertion hole 19 of the knock bar 3-1 protruding from the rear end of the ink storage tube 2-2 from the rear end of the shaft cylinder 1. -20 and the ink container tube 2-2 are inserted into the shaft cylinder 1 so that the refill 2 is knocked.
The entire length L of the main body A can be reduced by the amount inserted into the rotor insertion hole 19 of 3-1. In other words, it is possible to manufacture a knock-type writing instrument having a length L ₁ is substantially equal to the main body portion A of the refill 2.

Further, a refill removal preventing portion 21 is provided in the refill fitting hole 20 of the rotor 3-2, and the ink accommodating tube 2-2 of the refill 2 is held in the refill fitting hole 20 so as not to be able to be removed.
Further, urging of the refill 2 toward the rear of the barrel 1 by the resilient member 4 is performed via the rotor 3-2. In other words, since the refill 2 is not directly biased by the resilient member 4 as in the related art, but is biased via the rotor 3-2, the refill 2 can be renewed every time the knock operation is performed. Is the rotor 3-2
Will rotate with it. As a result, the transfer ball 12 held by the ball house 11 of the writing unit 2-1 and rotated in contact with the house seat surface 11-1 at the time of writing is housed in the house seat surface 11-1.
The contact with -1 is uniformly performed on all the house seating surfaces 11-1. Therefore, the gripping direction of the barrel 1 by the clip 16 is eliminated. Further, the tip of the front cylinder portion 3-21 of the rotor 3-2 is positioned within the range of the gripping portion 1-1 of the shaft cylinder 1 to which the grip 6 is attached, and the resilient member 4 is used to rotate the rotor 3-2. Is configured to be biased to the rear of the barrel 1, so that the barrel 1
Even if the grip 6 is made of a transparent synthetic resin material,
Thereby, the resilient member 4 is blindfolded, and the existence of the resilient member 4 is not visually recognized from the outside.

[0025]

Since the dispensing type writing instrument of the present invention is constituted as described above, it has the following effects. . A refill fitting hole is formed over the entire length of a rotor rotatably provided in the shaft cylinder, having a long cylindrical shape having a length reaching the vicinity of the tip end side of the shaft cylinder. Since the rifle is configured to be loaded into the shaft cylinder with the ink storage tube inserted and held in the insertion hole, the ink storage tube can be protected by the rotor. Therefore, unlike the conventional writing implement, the ink storage tube does not bend and deform due to the writing pressure at the time of writing, and an unstable writing such as that the writing part is sunk into the tip of the barrel at the time of writing is eliminated, and stable. Can be written.

[0026] The rifle fitting insertion hole of the rotor is provided with a refill removal preventing portion to hold the rifle in the refill fitting insertion hole so that it cannot be pulled out, and is configured to urge the refill to the rear of the shaft cylinder via the rotor. from becoming, refill will rotate together with the rotor every time the knock operation. As a result, it is held by the ball club of the writing department,
Since the transfer ball, which rotates in contact with the house seating surface during writing, comes into contact with the house seating surface evenly over the entire house seating surface, abrasion due to contact at one place like a conventional writing instrument. Is eliminated. In other words, the direction in which the shaft cylinder is gripped by the clip is eliminated.

[0027] The refill is inserted into the rotor insertion hole of the knock bar that protrudes from the rear end of the shaft cylinder, and the refill is inserted in the state where the rear end side of the ink storage tube is inserted together with the insertion tube part of the rotor with the refill insertion hole extended. from becoming configured to be loaded within, without changing the length L ₁ of the refill itself, it is possible to shorten the length L of the entire body portion extending from the distal end of the barrel to the knock rod at the rear end it can. That is, since the refill is inserted into the rotor insertion hole of the knock bar, the entire length L of the main body can be reduced. In other words, it is possible to manufacture and provide a dispensing type writing instrument having a body portion substantially equal to the length of the refill.

[0028] Since the tip of the long cylindrical rotor is located within the range of the gripping portion of the barrel to which the grip is attached, and is configured to be biased rearward of the barrel by a resilient member, Even when the barrel is formed of a transparent synthetic resin material, the resilient member is blindfolded by the grip, and the presence of the resilient member is not visible from the outside.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a knock-type writing instrument as an example of an embodiment of the present extended writing instrument, showing a state in which a writing portion of a refill is immersed in a front end of a tip of a barrel.

FIG. 2 is a longitudinal sectional front view of the refill with a writing portion protruding from a front end of a tip of a barrel.

FIG. 3 is an enlarged cross-sectional view taken along the line III-III of FIG.

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

FIG. 5 is an enlarged cross-sectional view taken along the line VV of FIG. 1, wherein (a) shows a state in which the writing portion of the refill is immersed in the front end of the tip of the barrel, and (b) shows a writing portion of the refill. Shows the state where it protrudes from the tip of the tip

FIG. 6 is an enlarged cross-sectional view taken along the line VI-VI of FIG. 1;

FIG. 7A is an enlarged longitudinal cross-sectional view showing a tip side of a writing portion, and FIG. 7B is a cross-sectional view taken along line bb of FIG.

FIG. 8 is an exploded front view.

9A is a developed front view of the claw receiving portion shown in FIG. 5A, and FIG. 9B is a developed front view of the same claw receiving portion shown in FIG. 5B.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Shaft cylinder 2 ... Refill 2-1 ... Writing part 2-2 ... Ink storage tube 3 ... Feeding mechanism 3-1 ... Knock rod 3-2 ... Rotor 3-20 ... Insertion cylinder part 3-3 ... Claw receiving Part 4: Elastic member 5: Tip 6: Grip 7: Spring retaining part 8: Piece 11: Ball house 11-1: House seating surface 12: Transfer ball 13: Locking claw 14, Locking edge 15 ... Claw sliding groove 16… Clip 17… Detent stop 18… Claw guide pushing / moving part 19… Rotator insertion hole 20… Refill fitting insertion hole 21… Refill removal prevention part 22… Air exchange hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2000-15988 (JP, A) JP-A-3-79992 (JP, U) JP-A-2-108087 (JP, U) JP-A-2-80488 (JP, U) JP-A-1-165292 (JP, U) JP-A-49-34199 (JP, Y1) Patent 3262754 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B43K 24/08

Claims (4)

(57) [Claims] More 1. A knock operation, at the writing portion of the refill the feeding type writing instrument configurations having a feeding mechanism for projecting and retracting from the front end of the barrel, non-rotatably mountable on the rear end side inside the barrel A rotor having a claw receiving portion, a clip integrally formed on a portion exposed from the shaft cylinder, and a locking claw that is removably engaged with the claw receiving portion is provided. A dispensing type writing implement having a long cylindrical shape having a length at least in the vicinity of the tip end side of a shaft cylinder, and having a refill fitting hole formed over the entire length of the rotor. 2. The dispensing writing instrument according to claim 1, wherein a refill retaining portion is provided in the refill fitting hole, and a resilient member is mounted on a tip side of the rotor, and the rotor is attached to the rear of the shaft cylinder. A dispensing writing implement characterized by being energized. 3. The dispensing writing instrument according to claim 2, wherein the tip of the rotor abuts against one end of the resilient member and is located in a range of a gripping portion of a shaft cylinder on which a grip is mounted. Feeding writing instrument. 4. The dispensing type writing instrument according to claim 1, wherein a rotor insertion hole is provided from a front end to a rear end of the knock bar, and an insertion cylinder portion is provided in the rotor. A dispensing type writing instrument, wherein a tubular portion is rotatably inserted into the rotor insertion hole, and a refill fitting hole is extended and opened inside the inserted tubular portion.