JP3271228B2 - Gripping structure of writing and applicator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gripping structure for an application tool such as a writing tool or a makeup tool which can move, select and fix a gripping portion in a longitudinal direction of a barrel by a relatively simple operation. It is about.

[0002]

2. Description of the Related Art As a conventional technique, Japanese Utility Model Application Laid-Open No. 62-306 is disclosed.
No. 87. The present invention provides a locking ring comprising: a plurality of engagement grooves provided in a shaft cylinder; and at least one engagement piece having an engagement protrusion engageable with the engagement groove. A writing instrument grip device comprising a fastening ring that can be fastened to the locking ring while suppressing outward deformation of the mating piece.

[0003]

In the prior art, the user operates a locking ring and a fixing ring, which are gripping portions, to move the gripping member in the longitudinal direction of the barrel so that the user can hold the gripping position (from the writing tip to the gripping portion). Distance) can be selected, but the operation is troublesome.

[0004]

SUMMARY OF THE INVENTION The present invention provides a gripper structure for a writing instrument and an applicator which can move, select and fix the gripper position in the longitudinal direction of the barrel by a relatively simple operation. A screw portion is formed on the surface of the shaft cylinder, and at least a plurality of inwardly projecting portions formed on the inner surface of the cylindrical grip portion are engaged with the screw portion to rotate on the outer surface of the shaft tube. And at any position of the gripping portion, the engagement state between one of the inwardly protruding portions and the screw portion of the shaft cylinder, at least in the other inward direction. A first aspect is a grip portion structure in a writing instrument or an applicator in which the engagement state between one of the protruding portions and a thread portion of a barrel is different, and a thread portion is formed on a surface of the barrel, and a tubular grip portion is formed. The screw formed on the inner surface of the shaft is screwed to the screw, and the outer surface of the barrel is screwed. It is arranged so as to be rotatable and movable in the longitudinal direction, and the angle of the screw thread of the screw part of the barrel is different from the angle of the screw thread of the screw part of the gripping part. A second aspect of the present invention has a grip portion structure in a writing instrument and an applicator in which a peak portion is bitely engaged with an inclined surface of a valley portion of the other screw thread, and a thread portion is formed on the surface of the shaft cylinder to form a cylindrical grip. A screw portion formed on the inner surface of the portion is screwed to the screw portion, and is rotatably arranged on the outer surface of the barrel, and is arranged so as to be movable in the longitudinal direction, and a top portion of at least one of the screw threads of the screw portion The third aspect of the present invention has a grip portion structure in a writing instrument and an applicator in which a thread portion is engaged with a valley portion of the other thread crest, and a thread portion is formed on the surface of the shaft cylinder and formed on the inner surface of the cylindrical grip portion. The screwed part is screwed onto the screwed part, and can be turned on the outer surface of the barrel, and can be moved in the longitudinal direction. A groove is formed in at least one of the top of the thread of the threaded portion of the barrel and the top of the thread of the threaded portion of the gripping portion, and the top is threaded by the thread of the other threaded portion. A fourth aspect of the present invention is a gripping structure of a writing instrument and an applicator that is pressed into engagement with a valley portion of the writing instrument.

Hereinafter, an embodiment applied to a writing instrument will be described. However, the present invention can be similarly applied to an applicator such as a makeup tool. FIG. 1 shows an embodiment in which the present invention is applied to a ball-point pen. Reference numeral 1 denotes a head barrel (generally referred to as a tip member) 2 and a barrel body secured to the head barrel 2 by appropriate means. 3 is a shaft cylinder made of metal or synthetic resin, in which a shaft 5 (containing ink inside) having a writing portion (ball) 4 at its tip is housed. I have. A screw portion 6 is formed on the surface of the barrel body 3 of the barrel 1. Reference numeral 7 denotes a cylindrical gripping portion disposed on the outer surface of the shaft cylinder 1, and an inwardly projecting portion 8 is formed on the inner surface of the gripping portion 7, and the inwardly projecting portion 8 is attached to the screw portion 6. Like to engage. In the present example, as shown in FIG. 2, a plurality of projections (three in the figure) are formed at substantially the middle part of the grip part 7 at equal intervals in the circumferential direction. The formation position may be formed at the front part and / or the rear part of the grip part 7, or may be formed by shifting the position, not the circumferential shape, or increasing the number of protrusions. . Further, the number of the inwardly protruding portions 8 is arbitrary as long as a plurality of the inwardly protruding portions 8 are formed.
In addition, when the screw portion 6 is a three-thread screw, three screws are used.
It is preferable to match the number of protrusions with the number of threads.
A preferred combination is two inward protrusions and a double thread screw,
Three inward protrusions and three threads.

Further, the relationship between the screw portion 6 of the barrel 1 and the inwardly projecting portion 8 will be described in detail with reference to FIG. FIG. 3 is an example in which three inwardly projecting portions 8 are formed, and the state of engagement between one inwardly projecting portion 8 and the screw portion 6 (a relatively weak engagement in FIG. The engagement states (b, c, relatively strong engagement in the figure) between the two inwardly protruding portions 8 and the screw portions 6 are formed differently. That is, this means that the frictional resistances of A in the drawing and B and C in the drawing are different. In this way, when the grip 7 is rotated, moved in the longitudinal direction, and the position is selected, and when the grip 7 is gripped and writing is performed, writing pressure is applied. The writing pressure is supported by the relatively strong engagement, and the movement of the grip 7 can be prevented. In addition, the inwardly protruding portion 8 and the screw portion 6
As the engagement state with, the engagement states in a, b, and c in the drawing may be all different. For example, by changing the screw pitch, at a certain gripping portion position, the a In one or more inwardly protruding portions, the engagement state with the screw portion is relatively weakened. The engagement state may be changed, and if necessary, at least two types of engagement states may be present at any grip position.

The grip 7 will be described in more detail. The same applies to the following embodiments. Examples of the material include soft materials such as styrene-butadiene-based elastomer, olefin-based elastomer, styrene-based elastomer, polyamide-based elastomer, polyester-based elastomer, polyurethane-based elastomer, urethane, EVA (ethylene-vinyl acetate copolymer), and silicone resin. , A
S resin, ABS resin, POM resin, PS (polystyrene) resin, PET (polyethylene terephthalate) resin, PBT (polybutylene terephthalate) resin, PP
Various resins such as resin, PMMA (polymethacryl) resin, polymethylpentene, PC (polycarbonate) resin, PA (polyamide) resin, and PVC (vinyl chloride) resin can be used. A soft material and a hard material may be appropriately combined and used as a two-layer molded article made of a different material. A preferable combination is a styrene-based elastomer and a POM resin, a styrene-based elastomer and an ABS in consideration of moldability. Resin. It is useful to appropriately use a combination of a soft material and a hard material in that a delicate grip feeling can be exhibited.

[0008] In addition to the above materials, brass, phosphor bronze, wood and the like can be used. Further, the surface of the grip portion 7 preferably has a non-slip property in order to maintain a non-slip effect due to sweat or the like at the time of writing, but the term "has a non-slip property" refers to, for example, a thermoplastic elastomer, Materials made of non-slip materials such as silicone resin and wood, and materials that do not themselves have non-slip properties, but their surfaces are chemically treated, mechanically treated, physically treated, etc. By forming patterns such as knurls and lattices, by forming a number of small protrusions, by covering the surface with a cloth, the surface has a non-slip property itself, for example, thermoplastic elastomer, silicone resin It refers to both those treated, those whose diameters are gradually increased toward the front part from the middle part, and those which are made non-slip by painting or the like. Furthermore,
The grip 7 may be colorless or colored.

The operation of the example shown in FIG. 1 will be described. When the grip portion 7 is gripped and the barrel 1 is rotated, the grip portion 7 is moved in the longitudinal direction as a result. Therefore, the rotation is performed at a desired position (the distance from the gripped portion to the writing portion 4). Stop. Thereafter, when gripping and writing the grip portion 7, the engagement state between one of the inward protrusions 8 and the screw portion 6 and the engagement state between at least one of the other inward protrusion portions 8 and the screw portion 6. Since the states are different, the gripping portion 7 is supported by the strong engagement portion in the engaged state, absorbs the writing pressure, becomes a fixing means, and does not move backward.

As a fixing means at the time of writing, at least one of the other inwardly projecting portions 8 and the engagement state of the screw portion 6 may be different, but if more secure fixing is desired, In addition to the engagement between the inwardly protruding portion 8 and the screw portion 6, as shown in FIG. 4, an outwardly protruding portion 2a may be formed on the front barrel 2 to serve as a fixing assisting means. The protrusion 2a is formed by forming a plurality of protrusions in a circumferential shape in the figure. However, the protrusion 2a may be formed as an annular protrusion, a long or dot-shaped protrusion in the longitudinal direction, or the tip shaft cylinder 2 And a separate member (for example, formed by fixing a ring member to a leading tool). Further, a similar protrusion may be formed on the surface of the barrel body 3 in contact with the grip 7 instead of the protrusion 2a or together with the protrusion 2a.

Further, as a further example of the fixing auxiliary means, as shown in FIG. 5, an inward projecting engagement with the outer surface of the shaft cylinder 1 (the screw portion 6 in the figure) is formed on the inner surface of the grip portion 7. To form the portion 7a, the shape of the projection 7a is as follows.
A plurality of protrusions formed circumferentially, an annular protrusion formed, a long or point-shaped protrusion formed in the longitudinal direction, an inner cross-sectional shape of the grip portion 7 such as a pentagon, a hexagon, or the like. It is possible to adopt various shapes such as engaging with the outer surface of the barrel 1 at a substantially middle portion of each side, and forming the screw without engaging with the screw portion 6 of the barrel 1. For example, it may be formed at a rear portion of the grip portion 7 so as to be engaged with the unillustrated barrel main body 3 or may be formed at a front portion of the grip portion 7 so as to be engaged with the front barrel 2. When the protrusion 7a is formed on the front part and / or the rear part of the grip part 7, a large number of annular grooves or annular protrusions may be formed on the front barrel 2 and / or the barrel body 3 engaging with the projection 7a. Further, the number of the protrusions 7a is shown in the example of one in the figure, but the number is appropriate, but is more preferably plural, and more preferably three. Such protrusions 2a, 7a
A frictional resistance is generated between the inner surface of the shaft cylinder 1 and the outer surface of the barrel 1 and functions as fixing means (movement preventing means) of the grip 7 during writing.

Although FIG. 1 shows a writing instrument applied to a ballpoint pen, the invention can be applied to various writing instruments other than the ballpoint pen, such as a mechanical pencil, a fountain pen, and a marking pen. It is particularly suitable for a writing instrument that does not require a cap. The reason is that when applied to a writing instrument such as a water-based ballpoint pen, which becomes a problem in use when the ink dries, it is generally necessary to attach a cap to the front barrel, This is because there is a problem in that the cap is securely attached or detached, or it is necessary to devise a fastening structure. The same applies to the following examples. The same applies to the applicator.

FIG. 6 shows another embodiment of the gripper according to the present invention. The difference from the embodiment of FIG.
Are formed on the inner surface of the threaded portion 9 to be screwed to the threaded portion 6 of the barrel 1, and the screw shapes of the threaded portion 9 of the gripping portion 7 and the threaded portion 6 of the barrel 1 are devised. . 7 to 10 show specific examples of the screw shape of the grip portion 7 and the screw portion 6 of the barrel 1.

In the example shown in FIG. 7, the angle of the thread of the thread portion 6 of the barrel 1 and the angle of the thread of the thread portion 9 of the gripping portion 7 are different from each other. The engaging force between the two can be reduced by engaging the inclined surface of the valley of the screw thread in a biting manner, and the writing pressure can be absorbed during writing, serving as a fixing means, and the grip portion 7 can be moved rearward. It is to prevent. In the drawing, the thread ridge of the thread portion 6 of the barrel 1 is engaged with the inclined surface of the thread valley of the thread portion 9 of the grip portion 7 in a biting manner. The thread ridge of the thread portion 9 of the threaded member 7 may be engaged with the inclined surface of the valley of the thread of the thread portion 6 of the barrel 1 in a biting manner. Further, in this example, it is preferable that one material is hard and the other material is soft in order to engage the ridge portion of one screw thread with the inclined surface of the valley portion of the other screw thread. .

In the example shown in FIG. 8, the screw 9
By engaging the crests of the screw threads with the valleys of the screw threads of the screw portion 6 of the barrel 1 in a biting manner, the engaging force between the two is reduced, and the writing pressure is absorbed at the time of writing, thereby securing the fixing means. This prevents the grip portion 7 from moving backward. In the drawing, the top of the screw thread of the screw portion 9 of the gripping portion 7 is engaged with the valley of the screw thread of the screw portion 6 of the shaft cylinder 1 in a biting manner. The top of the thread 6 may be engaged with the valley of the thread of the thread 9 of the grip 7 in a biting manner. Also in this example, it is preferable that one material is hard and the other material is soft, as in the example of FIG.

In the example of FIG. 9, a groove 6a is formed at the top of the thread of the thread portion 6 of the barrel 1, and the top of the thread having the groove 6a is formed by the thread of the thread 9 of the grip portion 7. By pressing and engaging the valleys, the writing pressure is absorbed during writing, and serves as fixing means to prevent the grip portion 7 from moving backward. In the drawing, a groove 6 a is formed at the top of the thread of the thread portion 6 of the barrel 1, and the top of the thread having the groove 6 a is pressed against the root of the thread of the thread 9 of the grip 7. However, a groove is formed at the top of the screw thread of the screw portion 9 of the grip portion 7, and the top of the thread formed with the groove is pressed into contact with the thread valley of the screw portion of the barrel cylinder. The grooves 6a may be formed at both the top of the thread of the thread portion 6 of the barrel 1 and at the top of the thread of the thread 9 of the grip portion 7, as shown in FIG. You may. Also in this example, it is preferable that one material is hard and the other material is soft, as in the example of FIG.

In the examples shown in FIGS. 7 to 10, similarly to the above-described embodiment, a protrusion may be formed as a fixing assisting means for the gripping portion at the time of writing.

In the present invention, various deformations other than those described above are possible. For example, if an antibacterial material is put into the material of the gripping part, the generation of mold and the like on the surface of the gripping part due to the adsorption of sweat and the like can be prevented. It is useful in the sense of preventing. As such an antibacterial material, a commercially available one (for example, Amenitop, Matsushita Electric Industrial Co., Ltd., Biocomposite Powder, Koa Glass Co., Ltd.) may be used.

[0019]

According to the present invention, the engagement between the screw formed on the surface of the barrel and the inwardly protruding portion or the screw of the inner surface of the grip is devised. To provide a gripping part structure in a writing instrument and an applicator which can be moved and selected in a longitudinal direction by a relatively simple operation, selected, and securely fixed without moving the gripping part by writing pressure at the time of writing. It has the effect of being able to do so.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view showing a first embodiment with a part omitted.

FIG. 2 is a partially cutaway perspective view showing a main part of FIG. 1;

FIG. 3 is a diagram illustrating an engagement state between an inwardly protruding portion of a grip portion and a screw portion of the grip portion.

FIG. 4 is a partial vertical cross-sectional view of another embodiment in which a part is omitted.

FIG. 5 is a partially cutaway perspective view showing another embodiment of the grip portion.

FIG. 6 is a partial vertical cross-sectional view of another embodiment in which a part is omitted.

FIG. 7 is a view for explaining an engagement state between a screw portion of the grip portion and a screw portion of the grip portion in FIG. 6;

FIG. 8 is a diagram illustrating an engagement state between a screw portion of another grip portion and a screw portion of the grip portion.

FIG. 9 is a diagram illustrating an engagement state between a screw portion of another grip portion and a screw portion of the grip portion.

FIG. 10 is a diagram illustrating an engagement state between a screw portion of another grip portion and a screw portion of the grip portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft barrel 2 Front barrel 2a Projection 3 Shaft barrel main body 4 Writing part 5 Center shaft 6 Screw part 6a Groove 7 Grip part 7a Projection 8 Inward projection 9 Screw part

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-94397 (JP, A) JP-A-6-48086 (JP, A) JP-A-6-20087 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B43K 3/00 B43K 23/008

Claims (4)

(57) [Claims] 1. A screw portion is formed on a surface of a shaft cylinder, and at least a plurality of inwardly projecting portions formed on an inner surface of a cylindrical holding portion are engaged with the screw portion to be rotatable on an outer surface of the shaft tube, and It is disposed so as to be movable in the longitudinal direction, and at any grip position, the engagement state between one of the inwardly protruding portions and the screw portion of the barrel is at least one of the other inwardly protruding portions.
A grip part structure in a writing instrument and an applicator in which engagement states of a screw and a screw portion of a shaft cylinder are different. 2. A screw portion is formed on the surface of the shaft cylinder, and a screw portion formed on the inner surface of the cylindrical holding portion is screwed to the screw portion so as to be rotatable on the outer surface of the shaft cylinder and movable in the longitudinal direction. The angle of the thread of the threaded portion of the barrel is different from the angle of the thread of the threaded portion of the gripping portion, and the threaded portion of the threaded portion of the threaded portion of the other threaded portion is A gripping structure of a writing instrument and an applicator which are engaged with the inclined surface in a biting manner. 3. A screw portion is formed on the surface of the shaft cylinder, and a screw portion formed on the inner surface of the cylindrical holding portion is screwed to the screw portion so as to be rotatable on the outer surface of the shaft tube and movable in the longitudinal direction. And a grip portion structure for a writing instrument and an applicator in which a top of at least one thread of the thread is engaged with a valley of the other thread in a biting manner. 4. A screw portion is formed on the surface of the shaft tube, and a screw portion formed on the inner surface of the cylindrical holding portion is screwed to the screw portion to be rotatable on the outer surface of the shaft tube and movable in the longitudinal direction. A groove is formed in at least one of the top of the thread of the screw portion of the barrel and the top of the thread of the thread of the grip portion, and the top is formed with the thread of the other thread. A gripping structure of a writing instrument and an applicator that is pressed into engagement with a valley.