JP2022051263A - Knock ring type writing instrument - Google Patents

Abstract

To provide a knock ring type writing instrument in which a knock ring fitted to the main body is knocked from the entire circumference in the axial direction to extend the core, and the number of parts is reduced so that the knock ring type writing instrument can be easily assembled.SOLUTION: A positioning groove 11 extending in the axial direction is formed on the inner surface of a main body 1, and a hook claw 28 is provided on the outer surface of a chuck piece 14 so as to be swingable. The positioning groove 11 is provided with a sliding groove 12 that opens outward. When the hook claw 28 of the chuck piece 14 is aligned with the positioning groove 11 and the chuck piece is inserted into the main body, the hook claw 28 enters a sliding groove 12 when facing the sliding groove 12. The hook 28 protruding from the sliding groove 12 fits into a window portion 39 of a slope tool 37 fitted to the main body. When a knock ring 42 mounted on the outer surface of the main body is knocked, the slope tool 37 advances, the chuck piece advances, and the core can be extended.SELECTED DRAWING: Figure 2

Description

According to the present invention, when a cursive such as a core is extended, the cursive can be extended by knocking a ring fitted on the outer periphery of the main body (shaft, shaft cylinder) from the entire circumference toward the axis of the main body. It is about the knockling type writing instrument that I made.

As a side knock type writing instrument with a knock button (knock ring) provided on the side of the main body to extend the writing body such as the core, a ring-shaped knock button is fitted to the main body and knocked from the entire circumference in the axial direction of the main body. There is known a writing instrument that allows the core to be drawn out (see, for example, Patent Document 1). In the mechanical pencil described in Patent Document 1, the shaft is divided back and forth at the rear part of the grip position, and a center pole sharing the center line with the shaft is provided in the shaft. Between the front shaft and the center shaft, a transmitter, which is a cylindrical component having a transmission pin hole and sharing a center line with the shaft, is arranged in a slidable clearance. At the rear part, there is a cylindrical part arranged in contact with the transmitter via a seat for adjustment, and at the rear part, which is slightly longer than the stroke of the core chuck when not knocked, and the outer diameter of the shaft is exposed to the outside of the shaft. A cylindrical part with the same outer diameter, a bottom surface with the same outer diameter as the shaft outer diameter, and a truncated cone with an upper bottom with the same outer diameter as the middle shaft outer diameter are integrated so that the bottom surface joins the cylindrical part. The followers that share the center line with the axis are arranged in a slidable clearance. When not knocking, a knock button is placed that shares the center line with the shaft and has the front end of a cylindrical part with the same shaft and inner and outer diameters and a length suitable for knocking in contact with the side surface of the truncated cone of the slave. ing. The rear end of the knock button is in contact with a stator that has the same shape as the slave and has an inverted truncated cone side surface. In the stator, if the truncated cone and the cylindrical part with the same outer diameter as the outer diameter of the shaft are fixed to the center pole in a tightly fitted manner, and the cylindrical part with the same outer diameter as the inner diameter of the shaft is tied between the rear shaft and the central shaft. It is fixed for the purpose. The center pole has a slit in which the transmission pin inserted into the transmission pin hole slides to a length that does not interfere with the stroke of the core chuck, and the center pole has a transmission pin hole to provide the shaft and center line. There is a center pole in-axis transmitter that can be slidable by providing a core passage hole in the center where the shared cylindrical part and the part with the conical trapezoidal space are integrated. And the transmitter in the center pole are combined to form a knock mechanism.

The mechanical pencil knock mechanism described in Patent Document 1 moves the chuck via a slave, a transmitter, a transmission pin, and a transmitter in the center pole by pressing the knock button from the entire circumference in the axial direction. The lead can be drawn out. However, in addition to the knock button and the slave, a stator, a transmitter with a transmission pin hole, a transmission pin passing through a slit in the center pole, and a transmitter in the center pole having a transmission pin hole and slidably provided in the center pole, Since it must be composed of a member such as a core chuck pressed by a transmitter in the center pole, the number of parts is large and assembly is troublesome. In particular, in order to connect the slidable transmitter between the front shaft and the center pole and the intra-center pole transmitter slidably provided in the center pole, each member is connected laterally to the axis. A transmission pin hole to be opened is provided, a transmission pin is inserted into the transmission pin hole from the outside of the transmitter, the tip thereof protrudes into the center pole through a slit of the center pole, and the tip of the transmission pin is incorporated in the center pole in advance. Since it is necessary to insert and fix it in the transmission pin hole of the transmitter in the center pole, the assembly work is very troublesome and it is difficult to obtain economically. In addition, because the chuck is connected to the knock button in a state of being in contact with each other without a gap due to the above configuration, when writing pressure is applied to the tip of the core, the chuck cannot be retracted, so that the core holding action becomes uncertain and the core becomes uncertain. May be immersive

Further, an all-around knock-type writing tool that stabilizes the knock operation of the knock button as compared with the mechanical pencil described in Patent Document 1 has also been proposed (see, for example, Patent Document 2). The writing tool described in Patent Document 2 is provided with a knock member that surrounds the shaft cylinder over the entire circumference on the circumference of the shaft cylinder, and the knock member can be swung with respect to the shaft cylinder with the front portion or the rear portion as a fulcrum. It is a writing tool characterized in that the fulcrum is provided at a position opposite to the pressing side in the surrounding portion of the knock member on the shaft tube across the axis line. In this writing tool, an intermediate partition wall is provided at the tip of the center pole inserted into the barrel, a pressing slider is placed in front of the intermediate partition wall, and a rod-shaped pressing transmitter is provided at the rear of the pressing slider. It is integrally projected toward the rear, and the intermediate partition wall is provided with a through hole for slidably penetrating the press transmitter, and the tip of the press transmitter passed through the through hole is provided. A knock member is provided so as to face the lower surface of the piece stand that moves back and forth and to be in contact with the conical surface provided on the upper surface of the piece stand. When the knock member is knocked, the piece stand advances and pushes the pressing slider via the pressing transmitter, and as the pressing slider advances, the chuck body advances through the receiving plate and the core is extended. Can be done.

However, in the writing tool described in Patent Document 2, a piece stand, an intermediate partition wall, and a pressing slider are sequentially arranged in the axle cylinder in front of the knock member fitted to the axle cylinder, and the pressing slider is projected onto the pressing slider. The transmitter is projected toward the rear piece stand through the through hole provided in the intermediate partition wall and faces the piece stand. Therefore, the structure is such that a plurality of members are layered on top of each other along the longitudinal direction of the barrel, which is long, has a large number of parts, and is a pressing transmitter projecting from the pressing slider during assembly. It is very troublesome because it requires an assembly work of inserting the sword into a small through hole in the intermediate partition wall.

JP-A-2006-76274 (Claim 1, paragraphs 0015 to 0020, FIGS. 1, 2) Japanese Patent No. 5262088 (Claim 1, paragraphs 0018 to 0021, FIGS. 2, 3)

The problem to be solved by the present invention is a writing instrument in which a knock ring provided on a main body (shaft, shaft cylinder) can be knocked from the entire circumference in the axial direction to extend a cursive such as a core, and the number of parts is large. It is to provide a knockling type writing instrument that is small, easy to configure, and easy to assemble.

According to the present invention, the main body composed of the main body and the lower part connected to the main body and the inner surface of the main body are aligned with a sliding groove extending along the axial direction and partially opening outward. A chuck piece having a groove, a swingable hook claw on the outer surface, and a chuck, a clutch, and a chuck spring mounted on the tip, and a window portion that is movably fitted to the outer periphery of the main body and into which the hook claw enters. A cylindrical knock ring that is fitted around the outer circumference of the main body behind the slope tool and can move from the entire circumference direction to the axial direction of the main body, and the rear part of the slope tool and the front part of the knock ring are in contact with each other. A slope return spring that urges the slope to contact in the knock ring direction, and a tilt guide provided between the rear of the slope and the front of the knock ring to advance the slope when the knock ring is knocked in the axial direction. The chuck piece is provided so as to be loosely inserted into the alignment groove while the chuck piece is inserted into the main body so as to be movable back and forth, and when facing the sliding groove, the hooking claw is slid. A knockling type writing tool is provided, which is characterized in that it protrudes from a moving groove and is fitted into a window portion of a slope tool.

A chuck inserted from the tip on the main body is fixed to the tip of the chuck piece, and when the chuck urged rearward by the chuck spring grips the core in a state where no writing pressure is applied, the chuck piece's hooking claw The knock ring type writing tool is provided in which a pressure gap is formed between the rear end surface and the window edge of the slope tool.

In the chuck piece, a core receiving portion is formed at the rear portion by an inscribed circle portion inscribed in the main body, and the center receiving portion is provided with an alignment rib inserted into the alignment groove. The knock ring type writing tool. Is provided.

The present invention is configured as described above, and an alignment groove extending along the axial direction is provided on the inner surface of the main body, and a sliding groove that opens outward is formed in a part of the alignment groove, and the alignment groove is formed. Since the chuck piece is pushed into the main body while loosely fitting the hooking claw formed to swing on the outer surface of the chuck piece, the chuck piece can be easily mounted in the main body and the hooking claw is the above-mentioned sliding groove. When facing the surface, the hooking claw enters the sliding groove and the chuck piece can be easily incorporated into the main body so as to be movable back and forth. Furthermore, since the hooking claw is provided so as to be swingable, it protrudes from the sliding groove and elastically fits into the window portion of the slope tool fitted to the outside of the main body, so that the assembly work is extremely easy and short. I can do it in time.

Further, since the center receiving portion is formed at the rear portion of the chuck piece by the inscribed circle portion inscribed on the main body, and the alignment rib inserted into the alignment groove is provided in the center receiving portion, the chuck piece can be placed inside the main body. The chuck piece does not skew when it is inserted into, and it can be inserted in a stable state, and the mounting work can be performed reliably. A chuck equipped with a clutch is inserted from the tip on the main body and fixed to the tip of the chuck piece, but the chuck urged backward by the chuck spring grips the core when no writing pressure is applied. When the pressure is applied, a pressure gap is formed between the rear end surface of the hooking claw of the chuck piece and the window edge of the slope tool. It can be grasped and can be written reliably.

An embodiment of the present invention is shown, (A) is a side view at the time of writing, and (B) is a side view at the time of knocking. Sectional view at the time of writing. Sectional view at the time of knocking. The main body is shown, (A) is a front view, (B) is a side view, and (C) is a sectional view. The bottom of the main body is shown, (A) is a front view, and (B) is a sectional view. The chuck pieces are shown, (A) is a front view, (B) is a cross-sectional view, (C) is a perspective view seen from the front, and (D) is a perspective view seen from the rear. The slope tool is shown, (A) is a front view, (B) is a sectional view, and (C) is a plan view. The knock ring is shown, (A) is a front view, (B) is a sectional view, and (C) is a plan view. Auxiliary slope tools are shown, (A) is a front view, (B) is a sectional view, and (C) is a plan view. Sectional drawing which shows the other embodiment.

The present invention can be applied to a writing instrument using a ballpoint pen refill or the like as a cursive, but the figure shows an embodiment applied to a writing instrument using a lead core as a cursive. With reference to FIGS. 1 to 3, in FIG. 1, the upper part provided with an eraser or the like is referred to as "upper" and "rear", and the lower part where the core is drawn out during writing is referred to as "lower", "front" and "front". As described above, the main body 1 is composed of a main body 2 and a main body lower 3 connected to the main body 2. As shown in FIG. 4, the upper 2 of the main body is formed in a cylindrical shape, has a clip 4 on the outer surface, and has a small diameter portion at the front portion via a step portion 5 in the middle of forming an outer diameter gradually larger than that of the rear portion. 6 is formed, a male screw 7 is provided on the outer periphery of the tip, and a female screw 8 formed on the inner surface of the lower 3 of the main body is screwed onto the male screw 7 to form the main body 1, and the outer surface of the small diameter portion 6 on the main body 2 is formed. A storage space 9 is formed between the inner surface of the main body and the inner surface of the lower portion 3. An eraser 10 is attached to the rear end of the main body 2, and an alignment groove 11 extending along the axial direction is formed on the inner surface in a facing state. A sliding groove 12 that opens outward is formed in the positioning groove 11 of the portion corresponding to the storage space 9, and the length of the sliding groove 12 is the chuck piece 14 when the core 13 is extended. It corresponds to the amount of movement of.

As shown in FIG. 5, the lower portion 3 of the main body has a tapered tip, and as shown in FIG. 1, a core protection pipe 15 made of a stainless steel pipe is fixed to the tip, and the core 13 drawn out by knocking is temporarily held. A breaker 16 made of a rubber material is mounted inside.

A chuck piece 14 to which a chuck 17, a clutch 18, and a chuck spring 19 are mounted is inserted into the main body 2. As shown in FIG. 6, the chuck piece 14 has a chuck piece main body 21 formed by providing flat surface portions 20 on both sides and having a substantially rectangular cross section, and a core insertion hole 22 is penetrated inside the chuck piece main body 21. A connection cylinder 23 is formed at the tip of the chuck piece main body 21 so that the base end of the chuck 17 inserted from the front end of the main body 2 can be press-fitted and fixed. A disk-shaped inscribed circle portion 24 that slides into contact with the inner surface of the main body 2 is formed in the main body, and the inscribed circle portion in the intermediate portion is connected by a rib 36. The rear inscribed circle portion 24 is a center receiving portion 26 having a conical center receiving surface 25 at the rear end surface thereof, and an alignment rib 27 that is loosely fitted in the alignment groove 11 is formed on the outer surface thereof.

A hook 28 is integrally formed on the outer surface of the chuck piece main body 21 so as to be swingable. The hook 28 is a substantially rod-shaped base piece 29 that is integrally connected to the flat surface portion 20 of the chuck piece main body 21 so as to be swingable and integrally connected to the base piece 29, and is outside from the rear portion of the base piece 29. It is provided with a locking portion 30 that projects toward the direction. The locking portion 30 has a width that allows it to enter the alignment groove 11, is formed in a substantially triangular shape in a side view, and spreads outward from the base piece side toward the rear so as to be a guide when the locking portion 30 is inserted into the alignment groove 11. An insertion guide surface 31 that is inclined in such a manner, an outer end surface 32 that extends rearward along the axis of the main body 2 from the rear end of the insertion guide surface 31, and an axis 2 on the main body from the rear end of the outer end surface 32. It is provided with a rear end surface 33 extending slightly inclined in the central direction, and a flank 34 connected in a state of being inclined from the inner end of the rear end surface 33 to the rear portion of the base piece 29. Then, when the chuck piece 14 is inserted into the flat surface portion 20 of the chuck piece main body 21 from the rear end of the main body, the hooking claw 28 hits the inner surface of the main body and can pass through without any problem even if it bends inward. A recessed portion 35 facing the flank 34 is provided.

A cylindrical slope tool 37 is fitted in the storage space 9 so as to be slidably contacted with the outer periphery of the small diameter portion 6 on the main body 2 so as to be movable back and forth, and is urged rearward by the slope tool return spring 38. As shown in FIG. 7, the slope tool 37 is provided with a window portion 39 in which the locking portion 30 of the hooking claw 28 is inserted so as to face each other. The rear end edge of the window portion 39 becomes a hooking portion 40 to which the hooking claw 28 engages, and the hooking portion 40 can be reliably engaged when in contact with the rear end surface 33 of the locking portion 30. It is gently inclined. A spring receiving surface 41 to which the slope tool return spring 38 is in contact is formed at the front end of the slope tool 37.

A cylindrical knock ring 42 that can move in the axial direction of the main body when knocked from the entire circumferential direction is fitted on the outer periphery of the main body behind the slope tool 37. The tip of the knock ring 42 is in sliding contact with the rear end of the slope tool 37 which is urged rearward by the slope tool return spring 38, and there is a space inside the knock ring 42 at the time of writing. ing. As shown in FIG. 8, a chamfered portion 43 is formed on the open end edge of the knock ring 42 so as to be easily in sliding contact with the slope tool 37.

An inclined guide portion is formed between the rear portion of the slope tool 37 and the front portion of the knock ring 42 so that the slope tool 37 can be easily advanced when the knock ring 42 is knocked in the axial direction of the main body 1. ing. In the embodiment shown in the figure, the inclined guide portion forms a truncated cone portion 44 having a large outer diameter at the tip and a smaller outer diameter at the rear end at the rear end of the slope tool 37, and knocks on the truncated cone portion 44. When the knock ring 42 is knocked by sliding on the inner surface of the tip of the ring 42, the slope tool 37 is pushed to move forward. Instead of such a truncated cone portion, the rear end of the slope tool may be formed in a substantially square shape, and an inverted conical conical surface portion may be provided on the inner surface of the tip of the knock ring to serve as an inclined guide portion (not shown). Further, as shown in FIG. 1 and the like, in the embodiment, as shown in FIG. 9, the auxiliary slope tool 46 having the truncated cone portion 44 in the opposite direction to the truncated cone portion 44 of the slope tool 37 at the tip thereof is formed. The auxiliary slope tool 46 is fitted in front of the step portion 5 on the main body 2 so that the rear end of the knock ring 42 is in sliding contact with the truncated cone portion 45 of the auxiliary slope tool 46. By doing so, the amount of movement (stroke) of the slope tool 37 when the knock ring 42 is knocked can be increased, but this auxiliary slope tool can be integrally molded with the step portion on the main body or omitted if desired. You can also do it.

Therefore, when the chuck piece 14 is inserted into the main body while the hooking claw 28 of the chuck piece 14 is loosely inserted into the positioning groove 11, the hooking claw 28 faces the sliding groove 12. It protrudes into the sliding groove 12, and the chuck piece 14 can be incorporated into the main body along the sliding groove 12 so as to be movable back and forth. Then, the hooking claw 28 further protrudes outward due to the elastic action and fits into the window portion 39 of the slope tool 37.

A chuck 17 having a clutch 18 mounted on the connection cylinder 23 at the tip of the chuck piece 14 is inserted and fixed from the tip on the main body. Then, the chuck 17 is urged backward by the chuck spring 19 while gripping the core 13, but the rear end surface 33 and the slope tool of the hook 28 of the chuck piece 14 are not acted on by the writing pressure. As shown in FIG. 1, the pen pressure gap L is stopped between the hooks 40 formed on the edge of the window portion 37. Then, when the writing pressure acts, the chuck 17 retracts a little and firmly grips the core 13 so that writing can be performed.

Writing can be performed in the state shown in FIG. 1, and when the number of cores is reduced, if the knock ring 42 is knocked in the axial direction as shown in FIG. 2, the chuck 17 is inserted via the slope tool 37 and the chuck piece 14. The core 13 can be advanced and extended.

In the above embodiment, the inner surface itself of the rear portion of the main body 2 is formed as a core tank, but as shown in FIG. 10, a tubular tank 47 is formed at the rear end of the chuck piece 14 to form a core tank, and the rear end portion is formed. May protrude from the main body. By doing so, the eraser 10 portion attached to the rear end of the core tank 47 can be knocked forward and used as a normal knock-type writing tool.

1 Main body 2 Upper main body 3 Lower main body 11 Alignment groove 12 Sliding groove 14 Chuck piece 21 Chuck piece main body 27 Alignment rib 28 Hooking claw 37 Slope tool 38 Slope tool return spring 39 Window part 40 Hooking part 42 Knock ring 46 Auxiliary slope tool

Claims (4)

Swingable with the main body composed of the main body and the lower part connected to the main body, and the alignment groove having a sliding groove extending along the axial direction and partially opening outward on the inner surface of the main body. A chuck piece having a hooking claw on the outer surface and a chuck, a clutch, and a chuck spring mounted on the tip, and a slope tool having a window portion that is movably fitted to the outer periphery of the main body and into which the hooking claw can be inserted. Knock the slope tool so that the rear part of the slope tool and the front part of the knock ring are in contact with the cylindrical knock ring that is fitted to the outer circumference of the main body behind the slope tool and can move from the entire circumference direction to the axial direction of the main body. It is provided with a slope tool return spring for urging in the ring direction and a tilt guide portion provided between the rear part of the slope tool and the front part of the knock ring to advance the slope tool when the knock ring is knocked in the axial direction. While loosely inserting the hooking claw of the chuck piece into the alignment groove, the chuck piece is inserted into the main body so as to be movable back and forth, and when facing the sliding groove, the hooking claw is projected from the sliding groove and at the same time. A knock-ring type writing tool that is characterized by being fitted into the window of a slope tool. A chuck inserted from the tip on the main body is fixed to the tip of the chuck piece, and when the chuck urged rearward by the chuck spring grips the core, the rear end surface and the slope tool of the hooking claw of the chuck piece. The knockling type writing tool according to claim 1, wherein a pressure gap is formed between the edges of the window portion. 2. Knock ring type writing tool described in. The chuck piece has a chuck piece main body formed with flat surfaces on both sides and has a substantially rectangular cross section, and a core insertion hole is penetrated inside the chuck piece main body, and the chuck piece main body has a front end on the main body at the tip. It has a connecting cylinder for press-fitting and fixing the base end of the chuck inserted from, and a disk-shaped inscribed circle portion that slides into the inner surface of the main body at the intermediate portion and the rear portion adjacent to the connecting cylinder. , The substantially rod-shaped base piece is integrally connected so as to be swingable with a space between it and the flat surface portion of the chuck piece body, and the rear portion of the base piece has a width that allows it to enter the alignment groove. A locking portion that protrudes outward is formed in a substantially triangular shape in a side view, and the locking portion has an insertion guide surface that is inclined outward so as to be a guide when inserting into the alignment groove, and the inclination. An outer end surface extending rearward from the rear end of the guide surface, a rear end surface extending in the axial direction from the rear end of the outer end surface, and a flank surface extending from the inner end of the rear end surface to the rear portion of the base piece in an inclined state. The flat surface portion of the chuck piece faces the flank so that the hooking claw that hits the inner surface of the main body and bends inward can enter when the chuck piece is inserted from the rear end of the main body. The knockling type writing tool according to any one of claims 1 to 3, wherein a recess is formed.

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