JP2016020074A - Writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument that has a holding part conforming to a user's various grips and made of a rigid material.SOLUTION: A writing instrument 1 comprises a barrel 4, and a continuous ring-shaped member 5a that is arranged on the outer periphery of the barrel 4. The writing instrument 1 is formed in such a shape that an inside diameter of each ring-shaped member 5a is larger than an outside diameter of the barrel 4. Each ring-shaped member 5a can move in a radial direction with respect to the barrel 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a writing instrument.

  Generally, a writing instrument is gripped in various ways by a user's individual heel or the like. If the gripping part is easily adapted to various ways of gripping, the contact area between the finger and the gripping part will increase and the gripping pressure will be distributed, improving ease of handling and This is preferable because fatigue is reduced. In order to realize such a gripping part, the gripping part itself is deformed when gripped by providing the gripping part with a material having large elasticity such as rubber, elastomer, etc., and adapts to various gripping methods by the user. The structure of such a writing instrument is well-known (patent document 1 and patent document 2).

JP 2004-291612 A JP-A-11-314485

  When the gripping part is provided with a material having a large elasticity such as rubber or elastomer, due to the nature of the material, the gripping part may fall off the shaft tube due to swelling, and the surface of the gripping part cannot be easily removed. There's a problem.

  Therefore, a writing instrument using a metal material that can easily remove dirt as a gripping part is known. However, when the gripping part is made of a metal material, the metal is relatively hard, and thus has a large elasticity as described above. As described above, it is difficult to adapt to various ways of gripping by the user.

  Then, an object of this invention is to provide the writing instrument which has the holding part which adapts a user's various grip method.

  According to invention of Claim 1, it comprises a shaft cylinder and the continuous ring-shaped member arrange | positioned on the outer periphery of a shaft cylinder, and the internal diameter of each ring-shaped member is larger than the outer diameter of a shaft cylinder. A writing instrument is provided that is formed and each ring-shaped member is movable in a radial direction with respect to the shaft tube.

  According to invention of Claim 2, a writing instrument characterized by the ring-shaped member consisting of a hard material is provided.

  According to invention of Claim 3, the ring-shaped member is formed in the different body, The writing instrument characterized by the above-mentioned is provided. The ring-shaped member may be movable by connecting a part of each member.

  According to another aspect, there is provided a writing instrument characterized in that each of the ring-shaped members is rotatable around the axial direction of the shaft cylinder.

  According to another aspect, a writing instrument is provided in which the plurality of ring-shaped members are coil springs.

  According to the invention described in claim 4, there is provided a writing instrument characterized in that the positions of both ends of the plurality of ring-shaped members in the axial direction of the shaft cylinder can be adjusted in the axial direction.

  According to invention of Claim 5, the elastic member extended in the direction parallel to the axial direction of a shaft cylinder is arrange | positioned between the outer peripheral surface of a shaft cylinder, and the inner peripheral surface of a ring-shaped member. A writing instrument is provided.

  According to invention of Claim 6, a ring-shaped member has the inclination part inclined with respect to the axial direction, The writing instrument characterized by the above-mentioned is provided.

  According to invention of Claim 7, it has further the elastic member which urges | biases a ring-shaped member to an axial direction, The writing instrument characterized by the above-mentioned is provided.

  In addition, it is desirable that the ring-shaped member is a writing instrument characterized in that the ring-shaped member is arranged in a grip portion of the writing instrument during a writing operation.

  According to the invention described in each claim, it is possible to provide a writing instrument having a grip portion adapted to various ways of gripping by a user.

It is a front view in the writing state of the writing instrument which concerns on this invention. It is sectional drawing of the vertical direction in the non-writing state of the writing instrument of FIG. It is the schematic of the cross section of line AA of FIG. One Example which has arrange | positioned the elastic member in a part of space of FIG. 3 is shown. It is a front view in the writing state of the writing instrument of another embodiment which concerns on this invention. It is sectional drawing of the vertical direction in the non-writing state of the writing instrument of FIG. It is a front view in the writing state of the writing instrument of another embodiment which concerns on this invention. It is sectional drawing of the vertical direction in the non-writing state of the writing instrument of FIG. It is the figure which showed only the front axis | shaft of FIG. 8, a spring, and the holding part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Corresponding components are marked with common reference numerals throughout the drawings.

  1 is a front view of the writing instrument 1 according to the present invention in a writing state, FIG. 2 is a longitudinal sectional view of the writing instrument 1 in FIG. 1 in a non-writing state, and FIG. 3 is a line AA in FIG. It is the schematic of a cross section.

  In FIG. 1, the writing instrument 1 includes a front shaft 2 and a rear shaft 3 positioned behind the front shaft 2, a cylindrical tube 4 formed in a cylindrical shape, a grip portion 5 of the writing instrument 1, and a front end portion of the writing instrument 1. The base 6, the writing part 7 protruding forward from the base 6, the operation part 8 at the rear end of the writing instrument 1, and the inner cylinder 9.

  In this specification, in the axial direction of the writing instrument 1, the writing unit 7 side is defined as the “front” side, and the opposite side of the writing unit 7 is defined as the “rear” side.

  In FIG. 2, the front shaft 2 and the rear shaft 3 are coupled by being screwed together at a front shaft rear end screwing portion 2a and a rear shaft front end screwing portion 3a, respectively. Further, the front shaft 2 and the base 6 are coupled by being screwed together at the front shaft front end screwing portion 2b and the base screwing portion 6a, respectively. These connections are by screw connection, but other connection methods may be used.

  A refill 10 having a writing part 7 at the front end is arranged inside the shaft cylinder 4. The front portion of the refill 10 is urged rearward by a spring 11 supported at one end by a base 6. The biasing force biases the rotor 13 constituting the knock mechanism 12 backward via the refill 10.

  A plurality of cam portions 14 projecting radially inward and extending along the axial direction of the writing instrument 1 are formed at equal intervals along the circumferential direction on the inner surface of the inner cylinder 9 disposed at the rear end of the rear shaft 3. ing. The front shaft 2, the rear shaft 3, and the inner tube 9 constituting the shaft tube 4 are made of a relatively hard resin material such as polycarbonate resin.

  The knock mechanism 12 includes a rotor 13 that is disposed in the inner cylinder 9 so as to be movable in the front-rear direction, and an operation unit 8 that protrudes from the rear end of the inner cylinder 9 and is movable in the front-rear direction. Mechanism. As described above, the knock mechanism 12 is urged rearward through the refill 10 urged by the spring 11. The knocking operation is performed by pressing the operation unit 8 forward.

  When the knocking operation is performed, the rotor 13 is pushed forward by the movement of the operation unit 8, and the rotor 13 and the front end surface of the cam portion 14 of the inner cylinder 9 are locked. The writing state (FIG. 1) which protruded from the front end of 6 is maintained. When the knocking operation is performed again, the rotor 13 is pressed forward by the movement of the operation unit 8, and the engagement between the rotor 13 and the front end surface of the cam portion 14 of the inner cylinder 9 is released. For this reason, the knock mechanism 12 is moved rearward by the urging force of the spring 11, so that the writing unit 7 is also moved rearward from the front end of the base 6 and is in a non-writing state (FIG. 2). As another embodiment, the operation unit 8 may be provided at a place other than the rear end of the rear shaft 3.

  As described above, the front shaft 2 has the front shaft rear end screwing portion 2a at the rear portion and the front shaft front end screwing portion 2b at the front portion. Between the front shaft rear end screwed portion 2a and the front shaft front end screwed portion 2b, there is a cylindrical portion 2c extending in the axial direction. Further, the rear end of the cylindrical portion 2c has a flange portion 2d extending outward in the radial direction so as to form an outer diameter larger than the outer diameter of the cylindrical portion 2c. The flange portion 2d has a flange front end surface 2e that is a flat surface extending in the radial direction at the front portion, and the cylindrical portion 2c described above extends from the flange front end surface 2e to the front in the axial direction.

  In the present embodiment, the grip portion 5 is configured by arranging a plurality of ring-shaped members 5a formed separately from each other along the axial direction. The ring-shaped member 5a is an annular member having a central hole such as a washer. The grip portion 5, that is, the plurality of ring-shaped members 5a, are arranged so that each is closely sandwiched between the flange front end surface 2e of the front shaft 2 and the base rear end surface 6b which is the rear end of the base 6. Is done. Thereby, the movement of the grip portion 5 in the axial direction is restricted, but the movement in the radial direction and the rotational direction around the axis are not restricted except for the friction between the adjacent ring-shaped members 5a. Can be rotated freely.

  As one embodiment, it is possible to provide a mechanism that can adjust the distance between the front end surface 2e of the collar portion that sandwiches the grip portion 5 described above and the rear end surface 6b of the base, that is, the sandwiching force. For example, the collar front end surface 2e and the base rear end surface 6b may be a moving mechanism having a screw portion. By rotating the moving mechanism, it may be moved back and forth in the axial direction of the writing instrument 1 to adjust the distance or the force for pinching the grip portion 5.

  In FIG. 3, the ring-shaped member 5a which comprises the holding part 5 is arrange | positioned on the outer periphery of the cylindrical part 2c of the front shaft 2. As shown in FIG. Since the inner diameter of the ring-shaped member 5a is larger than the outer diameter of the cylindrical portion 2c, a space 16 is formed at least partially between the inner peripheral surface of the ring-shaped member 5a and the outer peripheral surface of the cylindrical portion 2c. Is done. Therefore, the ring-shaped member 5 a can freely move with respect to the cylindrical portion 2 c within the space 16.

  During this movement, the arrangement of the gripping portion 5 so as to be sandwiched between the collar front end surface 2e and the base rear end surface 6b described above causes radial contact between the adjacent ring-shaped members 5a. Frictional force resists movement. Therefore, when the user grips the grip portion 5 and the ring-shaped member 5a is moved in the radial direction, the ring-shaped member 5a is moved to its position by the frictional force or contact with the outer peripheral surface of the refill 10. It has the effect of being maintained at. In order to adjust the frictional force, it is possible to adjust the surface roughness of the front surface and the rear surface in the axial direction of the ring-shaped member 5a to set the friction coefficient to a predetermined value.

  FIG. 4 shows an embodiment in which an elastic member 17 is provided in a part of the space 16 in the cross section shown in FIG. The elastic member 17 has a circular cross section, is disposed on the outer peripheral surface of the cylindrical portion 2c at equal intervals of 120 ° in the circumferential direction of the cylindrical portion 2c, and is parallel to the axial direction of the cylindrical portion 2c. It is arranged to extend.

  When the ring-shaped member 5a moves in the radial direction and presses the elastic member 17, a force is applied to the ring-shaped member 5a in a direction to restore the original position due to the elasticity of the elastic member 17. Thereby, when gripping, the elastic member 17 is pressed by the movement accompanying the pressing of the ring-shaped member 5a, but when not gripping, the elastic member 17 is restored to its original shape. Therefore, the ring-shaped member 5a is restored to the home position shown in FIG. 4, and the design property of the entire gripping portion 5 is always maintained.

  The shape and number of the elastic members 17 are not limited to the embodiment shown in this embodiment, the cross-sectional shape of the elastic members 17 may be rectangular, and the number of elastic members 17 may be other than three. However, a configuration in which at least one elastic member 17 is pressed against all the radial movements of the ring-shaped member 5a to restore the ring-shaped member 5a to a fixed position is preferable. is there.

  5 is a front view of the writing instrument 1 according to another embodiment of the present invention in a writing state, and FIG. 6 is a longitudinal sectional view of the writing instrument of FIG. 5 in a non-writing state.

  5 and 6 show an embodiment in which an elastic member, for example, a coil spring, is used as the ring-shaped member constituting the grip portion 15, and the other structures are basically the same as those in FIGS. As shown in the figure, the coil spring is disposed so as to be sandwiched between the flange front end surface 2e and the base rear end surface 6b in a compressed state until the spiral wire rods come into contact with each other.

  Similar to the configuration of FIGS. 1 and 2, the outer peripheral surface of the cylindrical portion 2 c of the front shaft 2 and the inner peripheral surface of the grip portion 15 are spaced apart by forming a space 16 at least in part. In this embodiment, the user's ease of holding is improved by the reaction force of the coil spring deformed by gripping. Therefore, since it is only necessary to secure a space for deformation necessary to obtain such a reaction force of the spring, the space 16 in the configuration of FIGS. 5 and 6 is more than the space 16 in the configuration of FIGS. May be narrow.

  In this embodiment, unlike the embodiment of FIGS. 1 and 2 in which the grip portion 5 is configured by the laminated ring-shaped member 5a, the grip portion 15 is configured by a coil spring configured by a continuous wire. Therefore, when not gripping, a constant shape is always maintained. Therefore, although the same effect is obtained without the elastic member 17 as shown in FIG. 4, the elastic member 17 may be arranged as in FIG.

  Also in the present embodiment, a mechanism that can adjust the distance between the front end surface 2e of the flange portion that sandwiches the gripping portion 15 and the rear end surface 6b of the base, or the sandwiching force, as described above can be provided.

  In order to perform writing with the writing instrument 1, the writing part 7 is brought into a protruding state by the above-described knocking operation, and the holding part 5 of the writing instrument 1 is held with one hand, so that the writing operation can be performed in the same manner as a normal writing instrument. It becomes.

  When gripping the grip portion 5 in the embodiment shown in FIGS. 1 and 2, as described above, the grip applied against the frictional force between the adjacent ring-shaped members 5 a constituting the grip portion 5. Due to the force, each ring-shaped member 5a moves in the radial direction along the shape of the user's finger. This makes it possible to adapt to various ways of gripping by the user. In other words, there is an effect that any gripping method can be handled.

  Furthermore, since each ring-shaped member 5a is formed as a separate body, it can be freely rotated around the axial direction of the shaft tube 4, and is optimal for the user without holding it in the gripped state. It can be re-adapted to a proper grip.

  If the elastic member 17 as shown in FIG. 4 is disposed in the space 16, the ring-shaped member 5a can be restored to a fixed position in a state where the elastic member 17 is not gripped, so that the design is improved.

  In this regard, in the embodiment using a coil spring as the gripping portion 15, even if the coil spring is deformed by gripping once, the elastic member 17 is restored to the fixed position when the gripping is stopped. Even if it is not arranged inside, the same effect is obtained.

  Furthermore, by forming the ring-shaped member 5a from a hard material such as metal, there is an effect that dirt can be easily removed. Here, the hard material includes metal, non-rubber plastic (excluding rubber elastic materials such as rubber and elastomer), paper, wood, and the like, and it is particularly preferable to use a metal that is not easily altered by the environment.

  7 is a front view of the writing instrument 1 according to another embodiment of the present invention in a writing state, and FIG. 8 is a longitudinal sectional view of the writing instrument of FIG. 7 in a non-writing state. FIG. 9 is a view showing only the front shaft 2, the spring 18, and the grip portion 25 of FIG. 8.

  7 to 9 show an embodiment in which the ring-shaped member 25a formed separately from the ring-shaped member 5a in FIG. 2 is used as the grip portion 25, and the other structures are as follows. This is basically the same as FIG. 1 and FIG. As shown in FIG. 8, a space 16 is formed at least partially between the outer peripheral surface of the cylindrical portion 2c of the front shaft 2 and the inner peripheral surface of the grip portion 25, as in the configuration of FIGS. Spaced apart. The outer diameter of the ring-shaped member 25a gradually decreases in the direction toward the front in the axial direction so that the front portion of the grip portion 25 is tapered.

  As shown in FIG. 8, the ring-shaped member 25a is disposed so as to be sandwiched between the flange front end surface 2e and the base rear end surface 6b in a state of being in contact with each other. As shown in FIG. 9, the spring 18 is disposed in a compressed state between the ring-shaped member 25a at the rear end of the grip portion 25 and the flange front end surface 2e, and the ring-shaped member 25a is moved forward in the axial direction. And energize.

  Specifically, the ring-shaped member 25a at the rear end of the grip portion 25 has a rearward projecting portion 25b, and receives the spring 18 on the radially inner side of the rearward projecting portion 25b. The spring 18 abuts in a slightly compressed state between the flat portion 20a on the radially inner side of the rear protrusion 25b and the flange front end surface 2e, but is not completely compressed. Since there is a clearance between the rear end of the rear protrusion 25b and the flange front end surface 2e, the ring-shaped member 25a having the rear protrusion 25b can move rearward while further compressing the spring 18. . The flange front end surface 2e has a front protrusion 2f at the outer peripheral edge, and the rear protrusion 25b is received inside the front protrusion 2f. This configuration allows the rearward protruding portion 25b to be restrained from moving in the radial direction and to move stably only in the axial direction. The stable axial movement of the rear protrusion 25b enables the spring 18 to be stably compressed or expanded only in the axial direction. As shown in FIG. 8, the ring-shaped member 25a at the front end of the grip portion 25 has a flat surface portion 20b and abuts on the rear end surface 6b of the base. The forward movement due to the urging force of the spring 18 and the weight of each of the ring-shaped members 25 is limited by this contact.

  Here, the structure of the ring-shaped member 25a other than the front end and the rear end of the grip portion will be described in detail. As shown in FIG. 9, in this embodiment, the ring-shaped member 25a which comprises the holding part 25 has the inclination part 19 inclined with respect to the axial direction. The inclined portion 19 forms a shape like a part of the side surface of the cone. Flat portions 20 perpendicular to the axial direction are formed at the radially outer end and the inner end of the inclined portion 19, respectively. The cross section of the ring-shaped member 25a constituted by the inclined portion 19 and the two flat portions 20 is rotationally symmetric around the axial direction.

  When an external force is applied to the ring-shaped member 25a in the direction of the pressing direction A shown in FIG. 9, one ring-shaped member 25a is connected to the other adjacent ring along the inclined portion 19 between the adjacent ring-shaped members 25a. It moves relative to the member 25a. At this time, the movement in the radial direction of one ring-shaped member 25a to which an external force is applied causes the other ring-shaped member 25a adjacent to the inclined portion 19 to move in the axial direction. Thereby, the axial direction length of the whole holding part 25 comprised by the some ring-shaped member 25a becomes long, Therefore, the spring 18 which urges | biases the ring-shaped member 25a of the rear end of the holding part 25 is compressed further. It will be. The biasing force in the axial direction of the spring 18 increased by this further compression acts on the user's finger as a radial force via the inclined portion 19 of the ring-shaped member 25a, so that the ease of holding can be improved. .

  When the user releases the grip portion, the ring-shaped member 25a returns to the original position by the biasing force of the spring 18. This movement is limited to an optimal position by the flat surface portion 20 of the ring-shaped member 25a. As an example, this movement is limited by the plane portion 20 so that the radial outer planes of the adjacent ring-shaped members 25a are stopped at a position where they are smoothly and continuously arranged.

  The ring-shaped member 25a at the rear end of the gripping portion has the inclined portion 19 only at the front, and at the rear, as described above, the rear protruding portion 25b and the spring 18 are brought into contact with each other. Although it has a flat surface portion 20a on the radially inner side of 25b and a flat surface portion 20c on the radially outer side of the rear protruding portion 25b that abuts the front protruding portion 2f, the inclined portion 19 is not provided.

  The ring-shaped member 25a at the front end of the gripping portion has the inclined portion 19 only at the rear, and at the front, as described above, has the flat portion 20b that abuts the base end surface 6b. I don't have it.

  In this embodiment, the ring-shaped member 25 a can fulfill its basic function as long as it has the inclined portion 19. For example, the ring-shaped member 25 a may have a structure including only the inclined portion 19 that does not have the planar portion 20. Further, this embodiment is not limited to the ring-shaped member 25a, and can be realized by a compression spring having an inclined portion similar to the inclined portion 19.

  Furthermore, in this embodiment, the spring 18 for urging the ring-shaped member 25a forward is used, but as another example, the spring 18 is not provided and only the forward load due to the weight of the ring-shaped member 25a is provided. The same effect can be obtained also.

  Further, in this embodiment, as shown in FIGS. 8 and 9, the inclined portion 19 is inclined from the center of the inner diameter of the ring-shaped member 25 toward the rear outside in the radial direction. You may incline toward the front. Furthermore, the spring 18 may be disposed between the ring-shaped member 25a at the front end of the grip portion and the rear end face 6b of the base.

  The present invention can be realized even with a writing instrument that does not have the knock mechanism 12, and is not limited to the configuration having the knock mechanism 12 described above.

  1 and 2, the grip portion 5 is composed of a stack of ring-shaped members 5a having three types of outer diameters, and is configured to be stepped at a position where the outer diameter changes. The ring-shaped members 5a and 25a may all have the same outer diameter, or they all have different outer diameters and are smoothly tapered by being arranged in order of increasing outer diameter or decreasing order. Or any other combination.

  Further, rubber or the like having the same shape as the ring-shaped member 5a or 25a may be sandwiched between the adjacent ring-shaped members 5a or 25a. Further, in order to improve the design, the individual ring-shaped members 5a or It is also possible to combine the colors of 25a in various combinations.

  3 and 4, the outer diameter of the cross-section of the ring-shaped member 5a is shown as a circle, but the ring-shaped members 5a and 25a according to the present invention are not limited to this shape, and are hexagonal. Such a polygon may be used, and the same applies to another embodiment according to the present invention.

  5 and 6, the grip portion 15 is configured as a coil spring having one type of outer diameter, but may be configured by a coil spring having a plurality of outer diameters, or the outer diameter may be tapered. It may be configured to be larger or smaller, and any other combination may be used.

  In the embodiment described above, the laminated ring-shaped members 5a and 25a and the coil spring have been described as being disposed at a position where the writing instrument 1 is gripped, but the present invention is limited to the arrangement at this position. It is not a thing and may be arrange | positioned in the position which is not gripped when using the writing instrument 1, for example, the rear end part of the writing instrument 1, may be arrange | positioned in the whole range other than a holding part, or a holding part is included. It may be arranged in the entire range.

DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Front shaft 2a Front shaft rear end screwing part 2b Front shaft front end screwing part 2c Cylindrical part 2d Hook part 2e Hook front end surface 2f Front protrusion part 3 Rear shaft 3a Rear shaft front end screwing part 4 Shaft cylinder 5 Holding Part 5a ring-shaped member 6 base 6a base screwing part 6b base rear end face 7 writing part 8 operation part 9 inner cylinder 10 refill 11 spring 12 knock mechanism 13 rotor 14 cam part 15 gripping part 16 space 17 elastic member 18 spring 19 tilting Part 20 Plane part 20a Plane part 20b Plane part 20c Plane part 25 Grasping part 25a Ring-shaped member 25b Backward projecting part A Pressing direction

Claims (7)

Comprising a shaft tube and a continuous ring-shaped member disposed on the outer periphery of the shaft tube,
The inner diameter of each of the ring-shaped members is formed larger than the outer diameter of the shaft tube,
Each of the ring-shaped members is movable in the radial direction with respect to the shaft tube.   The writing instrument according to claim 1, wherein the ring-shaped member is made of a hard material.   The writing instrument according to claim 1, wherein the ring-shaped member is formed separately.   The writing instrument according to any one of claims 1 to 3, wherein positions of both ends of the plurality of ring-shaped members in the axial direction of the shaft cylinder are adjustable in the axial direction.   The elastic member extended in the direction parallel to the axial direction of the said axial cylinder is arrange | positioned between the outer peripheral surface of the said axial cylinder, and the internal peripheral surface of the said ring-shaped member. The writing instrument according to any one of 4 above.   The writing instrument according to any one of claims 1 to 4, wherein the ring-shaped member has an inclined portion inclined with respect to the axial direction.   The writing instrument according to claim 6, further comprising an elastic member that biases the ring-shaped member in the axial direction.

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