JP2018069553A - Writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument that comprises a holding part not only having a high-quality image imparted by a hard exterior part and elasticity imparted by an elastic body but also improving a fit for fingers.SOLUTION: A writing instrument 1 has a characteristic holding part. The writing instrument 1 comprises the holding part 20 that has an annular elastic body 22, a plurality of hard plate-like members 23 and 24 that are circumferentially arranged in such a manner as to cover an outer peripheral surface of the elastic body 22, and first and second ring-shaped members 25 and 26 for fixing front ends 23a and 24a and back ends 23b and 24b in the axial direction A of the plate-like members 23 and 24, respectively.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a writing instrument characterized by a gripping portion.

  Conventionally, high-quality gripping parts of writing instruments have been known to be decorated with high-quality materials, lacquer, sculpture, and the like, but have not been given the functionality of ease of gripping and fatigue. For this reason, for example, Patent Document 1 discloses a writing instrument having a grip portion adapted to various ways of gripping by the user, although the outer surface is formed of a non-rubber hard material such as metal.

Japanese Patent Laid-Open No. 2006-020074

  In the writing instrument described in Patent Document 1, a hard ring-shaped member is arranged on the outer periphery of the shaft tube constituting the grip portion, and an elastic member is provided between the shaft tube and the ring-shaped member, so that the finger shape is obtained. One end of the ring-shaped member moves inward in the radial direction so that the gripping portion is deformed. However, since the other end of the ring-shaped member protrudes outward in the radial direction, the grip portion does not necessarily fit the finger.

  Therefore, an object of the present invention is to provide a writing instrument having a grip portion that not only has a high-class feeling due to a hard exterior portion and elasticity due to an elastic body, but also has an improved fit to a finger.

In order to achieve the above-described object, according to the first aspect of the present invention, there is provided a writing instrument characterized by a gripping portion, and a plurality of elastic instruments and a circumferential direction are arranged so as to cover the outer peripheral surface of the elastic body. There is provided a writing instrument including a gripping portion having a hard plate-like member and first and second ring-like members that respectively stop the front end portion and the rear end portion in the axial direction of the plate-like member.
According to the second aspect of the present invention, in the first aspect, the plate-like member is composed of at least two kinds of plate-like members, and is alternately arranged in the circumferential direction on the outer peripheral surface of the elastic body. Is provided.
According to the third aspect of the present invention, in the second aspect, the plate member has first and second plate members, and the outward surface of the first plate member is the first plate member. A writing instrument is provided in which the outwardly facing surface of the second plate-shaped member is larger than the inwardly facing surface of the second plate-shaped member.
According to a fourth aspect of the present invention, there is provided the writing instrument according to the third aspect, wherein the thickness in the radial direction of the first plate member is thicker than the thickness in the radial direction of the second plate member.

  ADVANTAGE OF THE INVENTION According to this invention, it can provide a writing instrument provided with the holding part which not only has the high-class feeling by a hard exterior part, and the elasticity by an elastic body but improved the feeling of fitting to a finger.

It is a side view of the writing instrument in the 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the writing instrument in the 1st Embodiment of this invention. It is a perspective view of the grasping part disassembled in the 1st embodiment of the present invention. It is a perspective view of the assembled holding part in the 1st embodiment of the present invention. FIG. 5 is a cross-sectional view of the grip portion along line VV in FIG. 4. It is a perspective view of the holding part in the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the holding part along line VII-VII of FIG. It is a side view of the writing instrument in the 3rd Embodiment of this invention. It is a longitudinal cross-sectional view of the writing instrument in the 3rd Embodiment of this invention. It is a perspective view of the 1st plate-shaped member in the 3rd Embodiment of this invention. It is a perspective view of the 2nd plate-shaped member in the 3rd Embodiment of this invention. It is a perspective view of the holding part decomposed | disassembled in the 3rd Embodiment of this invention. It is a perspective view of the assembled holding part in the 1st embodiment of the present invention. It is a cross-sectional view of the grip part along line XIV-XIV in FIG. It is a cross-sectional view of the grip part along line XV-XV of FIG. It is a perspective view of the holding part in the 4th Embodiment of this invention. It is a longitudinal cross-sectional view of the holding part along line XVII-XVII of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In each drawing, the same code | symbol is provided to the same component. In addition, the content described below does not limit the technical scope of the invention described in the claims and the meaning of terms.

  FIG. 1 is a side view of a writing instrument 1 according to the first embodiment. In the present embodiment, a description will be given by taking as an example a dual-type writing instrument that houses a plurality of writing bodies and feeds out any one of the writing bodies from the distal end by a knocking operation, but the present invention is not limited to a double-type writing instrument. Note that it can also be applied to mechanical pens, ballpoint pens and other pens. In this specification, the front end side of the writing instrument 1 is defined as “front” in the axial direction A (or the axial line X), the rear end side of the writing instrument 1 is defined as “rear”, and the writing instrument 1 in the radial direction B. The external side of the writing instrument is defined as “outside” and the internal side of the writing instrument is defined as “inside”.

  First, the overall configuration of the writing instrument 1 will be outlined. As shown in FIG. 1, the writing instrument 1 generally includes a writing unit 10 that draws out a writing body and enables writing, a holding unit 20 that is held by a finger, and a shaft unit 30 that is positioned behind the holding unit 20. And an operation unit 40 for performing a knock operation.

  FIG. 2 is a longitudinal sectional view of the writing instrument 1 according to the first embodiment. The writing unit 10 includes a base 12 having a tip end 11 and five writing bodies 13 (only a part is shown) fed out from the tip end 11. The writing body 13 has a ball-point pen unit that accommodates inks of four different colors and a mechanical pencil unit.

  The grip portion 20 is arranged in the circumferential direction on the hard front shaft 21 fitted to the base 12, the annular elastic body 22 covering the outer peripheral surface of the front shaft 21, and the outer peripheral surface of the elastic body 22. First and second plate-like members 23 and 24 (see FIG. 3 for the second plate-like member 24) and a first ring shape for stopping the front end portions of the first and second plate-like members 23 and 24 It has a member 25 and a second ring-like member 26 that stops the rear end portions of the first and second plate-like members 23, 24.

  The shaft portion 30 includes a rear shaft 31 that is screwed into the second ring-shaped member 26, a spacer 32 that is disposed in the rear shaft 31 and maintains adjacent writing bodies at a predetermined interval, and the rear shaft 31. It has an eraser 33 disposed in a recess at the rear end of the rear cover and a cover 34 that covers the eraser 33. The rear shaft 31 has five slits 35 (only a part is shown) formed at equal intervals in the circumferential direction C. The slit 35 has a narrow narrow side wall 36 extending in the axial direction A and a wide wide side wall 37 extending in the axial direction A. At a boundary in the axial direction A between the narrow side wall 36 and the wide side wall 37, a locking surface 38 for locking a knock bar described later is formed.

  The operation unit 40 includes five knock bars 41 (only part of which are shown) that can slide along the slits 35, and a spring 42 disposed between the knock bar 41 and the spacer 32. The knock bar 41 is connected to the rear end of the writing body 13, and the spring 42 restores the positions of the knock bar 41 and the writing body 13.

  The knock bar 41 is displaced between the narrow side wall 36 of the slit 35 and the wide side wall 37 of the slit 35. The knock bar 41 includes a locking portion 43 that is locked to the locking surface 38 of the slit 35, an unlocking cam 44 that unlocks the other knock bar 41, and an unlocking of the other knock bar 41. And a pressed protrusion 45 pressed by the cam 44.

  For example, when the knock bar 41 is pushed forward in the axial direction A, the knock bar 41 slides from the narrow side wall 36 to the wide side wall 37 of the slit 35 and moves inward in the radial direction B. At this time, the locking portion 43 of the knock bar 41 is locked by the locking surface 38 of the slit 35, and the writing body 13 connected to the knock bar 41 is fed out from the tip end 11 of the writing instrument 1. Next, when the other knock bar 41 is pushed forward in the axial direction A, the unlocking cam 44 of the other knock bar 41 presses the pressed protrusion 45 of the knock bar 41 to move outward in the radial direction B. The knock bar 41 is moved to the position. At this time, the locking portion 43 of the knock bar 41 is released from the locking surface 38 of the slit 35, and the knock bar 41 is urged rearward in the axial direction A by the spring 42 and connected to the knock bar 41. The writing body 13 is stored in the writing instrument 1.

  In this specification, the shaft including the front shaft 21 and the rear shaft 31 described above is referred to as a “shaft cylinder 50”. In another embodiment, the front shaft 21 and the rear shaft 31 may be formed integrally, and in this case, the shaft tube 50 is formed as a single body.

  Then, the structure of the holding part 20 which is the characteristic part of this invention is demonstrated in detail. FIG. 3 is an exploded perspective view of the grip portion 20, and FIG. 4 is a perspective view of the assembled grip portion 20. The shaft cylinder 50 (front shaft 21) is formed by extrusion using a hard material including light metal such as aluminum, non-rubber plastic (excluding viscoelastic materials such as rubber and elastomer), wood, glass, or jewelry. It is formed into a cylindrical shape by injection molding or cutting.

  The elastic body 22 is formed in an annular shape using a flexible soft material such as rubber or elastomer. By forming the elastic body 22 from a soft material, elasticity can be imparted to the grip portion 20 of the writing instrument 1. The elastic body 22 has a cylindrical shape with a length shorter than that of the shaft tube 50 in the axial direction A. In addition, an elastic body may be comprised with the some plate-shaped body or cylindrical body extended in the axial direction A long rather than an annular body. In this case, the elastic body is arranged corresponding to the first and second plate-like members 23 and 24, and is elastic when the first plate-like member 23 is pressed inward in the radial direction B by the finger. Since the body is easily deformed, the fit to the finger is improved.

  The first and second plate-like members 23 and 24 are made of a hard material including light metal such as aluminum, non-rubber plastic (excluding viscoelastic materials such as rubber and elastomer), wood, glass, jewelry, and the like. Then, it is formed into a plate shape by extrusion molding, injection molding, cutting, forging, casting or the like. More preferably, the first plate-like member 23 is made of a material that is not easily damaged by a drop of metal, plastic, wood, or the like, and the second plate-like member 24 is dropped of ceramic, glass, jewelry, or the like. It is good to form with the material which is easy to be damaged by the impact by. Moreover, the 1st and 2nd plate-shaped members 23 and 24 have the film formed by the sprayer or vacuum deposition, and are colored and glossy. The first and second plate-like members 23 and 24 are formed of a hard material and colored or glossy, so that a high-class feeling is imparted to the grip portion 20 of the writing instrument 1. The first and second plate-like members 23, 24 are elongated in the axial direction A and have the same length as the elastic body 22. The first and second plate-like members 23 and 24 have front end portions 23 a and 24 a and rear end portions 23 b and 24 b in the axial direction A. Although the thickness in the radial direction B of the first plate member 23 is thicker than the thickness in the radial direction B of the second plate member 24, the diameters of the front end portion 23a and the rear end portion 23b of the first plate member 23 are the same. The thickness in the direction B is the same as the thickness in the radial direction B of the second plate-like member 24.

  In other embodiments, the first and second plate-like members 23 and 24 may have the same shape. Furthermore, in another embodiment, the plate-like member may be composed of three or more types of plate-like members instead of two types. This makes it possible to configure a gripping unit that suits the user's taste.

  The first and second ring-shaped members 25 and 26 are made of a hard material including a light metal such as aluminum, a non-rubber plastic (excluding viscoelastic materials such as rubber and elastomer), wood, glass, or jewelry. Formed by extrusion molding, injection molding, cutting, or the like. The first and second ring-shaped members 25 and 26 have a film formed by a sprayer or vacuum vapor deposition, and are colored or glossy.

  The first ring-shaped member 25 includes a small-diameter annular portion 25 a having an inner diameter equal to the outer diameter of the elastic body 22, the outer diameter of the elastic body 22, and the radial direction B of the front end portion 23 a of the first plate-shaped member 23. A large-diameter annular portion 25b having an inner diameter of a size obtained by adding the thickness of the second plate-like member or the thickness of the rear end portion 24a of the second plate-like member in the radial direction B. The second ring-shaped member 26 includes a small-diameter annular portion 26 a having an inner diameter equal to the outer diameter of the shaft tube 50, the outer diameter of the elastic body 22, and the radial direction of the rear end portion 23 b of the first plate-shaped member 23. A large-diameter annular portion 26b having an inner diameter of a size obtained by adding the thickness of B or the thickness of the rear end portion 24b of the second plate-like member 24 in the radial direction B. Further, the second ring-shaped member 26 has a thread annular portion 26 c having a thread for screwing onto the rear shaft 31.

  Next, a method for assembling the grip 20 will be described. First, the annular elastic body 22 is disposed on the outer peripheral surface of the shaft tube 50. The elastic body 22 may be press-fitted into the outer peripheral surface of the shaft tube 50 or may be fixed using an adhesive. Next, the first and second plate-like members 23 and 24 are alternately arranged in the circumferential direction C on the outer peripheral surface of the annular elastic body 22. The first and second plate-like members 23 and 24 may be temporarily fixed to the outer peripheral surface of the elastic body 22 using an adhesive, but the outer peripheral surface of the elastic body 22 is easy to deform. It is preferable that it is not fixed to.

  Subsequently, in order to stop the first and second plate-like members 23, 24 on the outer peripheral surface of the elastic body 22, the first ring-like member 61 is attached to the front end portions of the first and second plate-like members 23, 24. The second ring-shaped member 62 is disposed at the rear end portions 23b and 24b of the first and second plate-shaped members 23 and 24, respectively. No adhesive is applied to at least the front end portion 23a and the rear end portion 23b of the first plate-like member 23 so that the first plate-like member 23 can move in the radial direction B. That is, the front end portions 23a and 24a and the rear end portions 23b and 24b of the first and second plate-like members 23 and 24 are formed by the large-diameter annular portions 25b and 26b of the first and second ring-like members 25 and 26, respectively. It can only be stopped (pressed).

  Next, the inner peripheral surface 12 a of the base 12 is fixed to the outer peripheral surface 50 a of the shaft tube 50 by adhesive, screw fastening, press fitting, or the like, and the small-diameter annular portion 26 a and the screw thread annular shape of the second ring-shaped member 26. The portion 26 c is fixed to the outer peripheral surface 50 b of the shaft tube 50. As described above, the grip 20 as shown in FIG. 4 is assembled.

  FIG. 5 is a cross-sectional view of the grip 20 along the line VV in FIG. The first and second plate-like members 23, 24 are not limited, but are alternately arranged on the outer peripheral surface of the elastic body 22 at 12 intervals in the circumferential direction C. Of the twelve first plate-like members 23 arranged at equal intervals in the circumferential direction C, only the first plate-like member 23 that comes in contact with the finger is urged inward in the radial direction B. The deformation of the portion 20 is minimized and the fit to the finger is improved.

  The outward surface 23d of the first plate member 23 is smaller than the inward surface 23e of the first plate member 23, whereas the outward surface 24d of the second plate member 24 is the second plate member 24. Larger than the inward surface 24e. Accordingly, the first plate-like member 23 can move not only in the radial direction B but also in the inclined directions B1 and B2 inclined with respect to the radial direction B, so that the feeling of fitting to the finger is further improved. On the other hand, the movement of the second plate-like member 24 in the radial direction B is suppressed by the oblique side surface 23 c of the two adjacent first plate-like members 23.

  Further, the thickness of the first plate-like member 23 in the radial direction B is thicker than the thickness of the second plate-like member 24 in the radial direction B. Thereby, since the outer peripheral surface of the holding part 20 has an uneven shape, the grip force of the holding part 20 is improved.

  Next, with reference to FIG.6 and FIG.7, the writing instrument in 2nd Embodiment is demonstrated. The overall configuration of the writing instrument in the second embodiment is the same as the overall configuration of the writing instrument 1 in the first embodiment, and thus the description thereof is omitted. The gripper 60 of the writing instrument in the second embodiment is different from the gripper 20 of the writing instrument 1 in the first embodiment in that it can be replaced with another gripper.

  FIG. 6 is a perspective view of the grip 60 in the second embodiment. The holding part 60 does not have a shaft cylinder, and further includes first and second ring-shaped members 61 and 62 different from the first embodiment. The first and second ring-shaped members 61 and 62 are made of a hard material including a light metal such as aluminum, a non-rubber plastic (excluding viscoelastic materials such as rubber and elastomer), wood, glass, or jewelry. Formed by extrusion molding, injection molding, cutting, or the like. The first and second ring-shaped members 61 and 62 have a film formed by a sprayer or vacuum vapor deposition, and are colored or glossy.

  FIG. 7 is a vertical cross-sectional view of the gripper 60 taken along line VII-VII in FIG. Since the gripping part 60 does not have a shaft cylinder, the elastic body 22 is fixed only to the first and second ring-shaped members 61 and 62 so that the constituent members of the gripping part 60 are not unintentionally disassembled. Is preferred. The first and second ring-shaped members 61, 62 are small-diameter annular portions 61 a, 62 a having an inner diameter equal to the inner diameter of the elastic body 22, the outer diameter of the elastic body 22, and the front end of the first plate-shaped member 23. Large-diameter annular portions 61b and 62b having an inner diameter of a size obtained by adding the thickness in the radial direction B of the portion 23a.

  Next, a method for assembling the gripper 60 will be described. First, as shown in FIG. 6, the first and second plate-like members 23 and 24 are alternately arranged in the circumferential direction C on the outer peripheral surface of the annular elastic body 22. The first and second plate-like members 23 and 24 may be temporarily fixed to the outer peripheral surface of the elastic body 22 using an adhesive, but the outer peripheral surface of the elastic body 22 is easy to deform. It is preferable that it is not fixed to. Subsequently, in order to stop the first and second plate-like members 23, 24 on the outer peripheral surface of the elastic body 22, the first ring-like member 61 is attached to the front end portions of the first and second plate-like members 23, 24. The second ring-shaped member 62 is disposed at the rear end portions 23b and 24b of the first and second plate-shaped members 23 and 24, respectively.

  In FIG. 7, it is preferable to apply an adhesive to the front end surface 22a and the rear end surface 22b of the elastic body 22 before the first and second ring-shaped members 61 and 62 are arranged. Thereby, the front end surface 22a and the rear end surface 22b of the elastic body 22 are fixed to the small-diameter annular portions 61a and 62a of the first and second ring-shaped members 61 and 62, respectively. On the other hand, no adhesive is applied to the front end portion 23a and the rear end portion 23b of the first plate-like member 23 so that the first plate-like member 23 can move in the radial direction B. That is, the front end portion 23a and the rear end portion 23b of the first plate-like member 23 are merely stopped (pressed) by the large-diameter annular portions 61b and 62b of the first and second ring-like members 61 and 62. .

  As described above, since the elastic body 22 is fixed only to the first and second ring-shaped members 61 and 62, the constituent members of the grip portion 60 are not unintentionally disassembled. Are assembled as a single body, the writing instrument in the second embodiment can be easily replaced with another gripping part by removing the gripping part 60 from the shaft tube as necessary.

  Next, the writing instrument 2 in the third embodiment will be described with reference to FIGS. Since the overall configuration of the writing instrument 2 in the third embodiment is substantially the same as the overall configuration of the writing instrument 1 in the first embodiment, only different parts (different symbols) will be described. The gripping part 70 of the writing instrument 2 in the third embodiment is different from the gripping part 20 of the writing instrument 1 in the first embodiment in that it is formed in a taper shape in the axial direction A.

  FIG. 8 is a side view of the writing instrument 2 in the third embodiment, and FIG. 9 is a longitudinal sectional view of the writing instrument 2 in the third embodiment. A plurality of gripping portions 70 of the writing instrument 2 are arranged in the circumferential direction on the hard front shaft 21 fitted to the base 12, the annular elastic body 22 covering the outer peripheral surface of the front shaft 21, and the outer peripheral surface of the elastic body 22. First and second plate-like members 73 and 74 (refer to FIG. 12 for the second plate-like member 74) and a first ring shape for stopping the front end portions of the first and second plate-like members 73 and 74 It has a member 75 and a second ring-shaped member 76 that stops the rear ends of the first and second plate-shaped members 73 and 74. A shaft coupling 39 having a thread for screwing onto the rear shaft 31 is disposed behind the second ring-shaped member 76.

  FIG. 10 is a perspective view of the first plate-like member 73 in the third embodiment, and FIG. 11 is a perspective view of the second plate-like member 74 in the third embodiment. The first and second plate-like members 73 and 74 are made of a hard material including a light metal such as aluminum, a non-rubber plastic (excluding viscoelastic materials such as rubber and elastomer), wood, glass, or jewelry. Then, it is formed into a plate shape by extrusion molding, injection molding, cutting, forging, casting or the like. More preferably, the first plate-like member 73 is made of a material that is not easily damaged by a drop of metal, plastic, wood, or the like, and the second plate-like member 74 is dropped of ceramic, glass, jewelry, or the like. It is good to form with the material which is easy to be damaged by the impact by. Moreover, the 1st and 2nd plate-shaped members 73 and 74 have a film formed by a sprayer or vacuum deposition, and are colored or glossy. The first and second plate-like members 73 and 74 are formed of a hard material and colored or glossy, so that a high-class feeling is imparted to the grip portion 70 of the writing instrument 2. The first and second plate-like members 73 and 74 are elongated in the axial direction A and have the same length as the elastic body 22. In the axial direction A, the first and second plate-like members 73 and 74 have front end portions 73a and 74a and rear end portions 73b and 74b.

  As a feature of the third embodiment, the thickness in the radial direction B of the first and second plate-like members 73 and 74 increases from the front to the rear in the axial direction A. Thereby, the holding part 70 comprised by the 1st and 2nd plate-shaped members 73 and 74 is diameter-expanded in the taper shape from the front of the axial direction A to back. Since the gripping portion 70 that expands in a tapered shape is easily adapted to the shape of the finger to be gripped, the feeling of fitting to the finger is improved.

  Further, as the thickness in the radial direction B of the first and second plate members 73 and 74 extending from the front to the rear in the axial direction A increases, the outward surface 73d of the first plate member 73 extends in the axial direction A. The outer surface 74d of the second plate-like member 74 expands from the front to the rear in the axial direction A, while shrinking from the front to the rear. On the other hand, the inward surfaces 73e and 74e of the first and second plate-like members 73 and 74 have substantially the same width over the axial direction A.

  FIG. 12 is a perspective view of the grip part 70 disassembled, and FIG. 13 is a perspective view of the grip part 70 assembled. The first and second ring-shaped members 75 and 76 are made of light metal such as aluminum, non-rubber plastic (excluding viscoelastic materials such as rubber and elastomer), hard material including wood, glass, or jewelry. Formed by extrusion molding, injection molding, cutting, or the like. Moreover, the 1st and 2nd ring-shaped members 75 and 76 have a film formed by a sprayer or vacuum deposition, and are colored or glossy.

  The first ring-shaped member 75 includes a small-diameter annular portion 75 a having an inner diameter equal to the inner diameter of the elastic body 22, the outer diameter of the elastic body 22, and the radial direction B of the front end portion 73 a of the first plate-shaped member 73. A large-diameter annular portion 75b having an inner diameter of a size obtained by adding the thickness or the thickness in the radial direction B of the front end portion 74a of the second plate-like member 74. The second ring-shaped member 76 includes a small-diameter annular portion 76 a having an inner diameter equal to the outer diameter of the shaft tube 50, the outer diameter of the elastic body 22, and the radial direction of the rear end portion 74 b of the second plate-shaped member 74. A large-diameter annular portion 76b having an inner diameter that is a size obtained by adding the thickness in B.

  The assembling method of the gripping part 70 in the third embodiment is the same as the assembling method of the gripping part 20 in the first embodiment. First, the annular elastic body 22 is disposed on the outer peripheral surface of the shaft tube 50, and then the first and second plate members 73 and 74 are alternately disposed in the circumferential direction C on the outer peripheral surface of the annular elastic body 22. To do. Subsequently, in order to stop the first and second plate-like members 73 and 74 on the outer peripheral surface of the elastic body 22, the first ring-like member 75 is connected to the front end portion of the first and second plate-like members 73 and 74. The second ring-shaped member 76 is disposed at the rear end portions 73b and 74b of the first and second plate-shaped members 73 and 74 while being disposed at 73a and 74a. The front end portions 73a and 74a and the rear end portions 73b and 74b of the first and second plate-like members 73 and 74 are stopped by the large-diameter annular portions 75b and 76b of the first and second ring-like members 75 and 76, respectively. (It can only be suppressed).

  Next, the inner peripheral surface 12a of the base 12 is fixed to the outer peripheral surface 50a of the shaft tube 50 by adhesive, screw fastening, press fitting, or the like, and the small-diameter annular portion 39a and the thread annular portion 39c of the shaft coupling 39 are connected to the shaft. The cylinder 50 is fixed to the outer peripheral surface 50b. As described above, the gripping portion 70 as shown in FIG. 13 is assembled.

  14 is a cross-sectional view of the grip portion 70 along line XIV-XIV in FIG. 13, and FIG. 15 is a cross-sectional view of the grip portion 70 along line XV-XV in FIG. Although the first and second plate-like members 73 and 74 are not limited, twelve of the first and second plate-like members 73 and 74 are alternately arranged at equal intervals in the circumferential direction C on the outer peripheral surface of the elastic body 22. Of the twelve first plate-like members 73 arranged at equal intervals in the circumferential direction C, only the first plate-like member 73 in contact with the finger is urged inward in the radial direction B. The deformation of the portion 70 is minimized and the fit to the finger is improved.

  Further, the outward surface 73 d of the first plate member 73 is smaller than the inward surface 73 e of the first plate member 73, whereas the outward surface 74 d of the second plate member 74 is the second plate member 74. Larger than the inward surface 74e. Accordingly, the first plate-like member 73 can move not only in the radial direction B but also in the inclined directions B1 and B2 inclined with respect to the radial direction B, so that the feeling of fitting to the finger is further improved. On the other hand, the movement of the second plate member 74 in the radial direction B is suppressed by the oblique side surface 73c of the two adjacent first plate members 73.

  Further, the thickness of the first plate-like member 73 in the radial direction B is thicker than the thickness of the second plate-like member 74 in the radial direction B. Thereby, since the outer peripheral surface of the holding part 70 has an uneven shape, the grip force of the holding part 70 is improved.

  Next, with reference to FIG.16 and FIG.17, the writing instrument in 4th Embodiment is demonstrated. The overall configuration of the writing instrument in the fourth embodiment is the same as the overall configuration of the writing instrument 2 in the third embodiment, and thus the description thereof is omitted. The gripping part 80 of the writing instrument in the fourth embodiment is different from the gripping part 70 of the writing instrument 2 in the third embodiment in that it can be replaced with another gripping part.

  FIG. 16 is a perspective view of the gripping portion 80 in the fourth embodiment, and FIG. 17 is a longitudinal sectional view of the gripping portion 80 taken along line XVII-XVII in FIG. Unlike the gripping portion 70 in the third embodiment, the gripping portion 80 does not have a shaft cylinder. For this reason, it is preferable that the elastic body 22 is fixed only to the first and second ring-shaped members 75 and 76 so that the constituent members of the grip portion 80 are not intentionally disassembled.

  Next, a method for assembling the grip portion 80 will be described. First, as shown in FIG. 16, the first and second plate-like members 73 and 74 are alternately arranged in the circumferential direction C on the outer circumferential surface of the annular elastic body 22, and then on the outer circumferential surface of the elastic body 22. In order to stop the first and second plate-like members 73 and 74, the first ring-like member 75 is disposed at the front end portions 73a and 74a of the first and second plate-like members 73 and 74, and the second The ring-shaped member 76 is arranged at the rear end portions 73b and 74b of the first and second plate-shaped members 73 and 74.

  In FIG. 17, an adhesive is applied to the front end surface 22a and the rear end surface 22b of the elastic body 22 before the first and second ring-shaped members 75 and 76 are arranged. Thereby, the front end surface 22a and the rear end surface 22b of the elastic body 22 are fixed to the small-diameter annular portions 75a and 76a of the first and second ring-shaped members 75 and 76, respectively. On the other hand, no adhesive is applied to the front end portion 73a and the rear end portion 73b of the first plate-like member 73 so that the first plate-like member 73 can move in the radial direction B. That is, the front end portion 73 a of the first plate-like member 73 is merely stopped (pressed) by the large-diameter annular portion 75 b of the first ring-like member 75.

  As described above, since the elastic body 22 is fixed only to the first and second ring-shaped members 75 and 76, the constituent members of the grip portion 80 are not unintentionally disassembled. Are assembled as a single body, the writing instrument in the fourth embodiment can be easily replaced with another gripping part by removing the gripping part 80 from the shaft tube as necessary.

  Although various embodiments have been described herein, the present invention is not limited to the various embodiments described above, and various modifications can be made within the scope described in the following claims. I want to be recognized.

1, 2 Writing instrument 20, 60, 70, 80 Gripping part 22 Elastic body 23, 73 First plate member 24, 74 Second plate member 23a, 73a Front end portion 23b, 73b of first plate member Rear end portions 23d, 73d of the first plate-like member Outward faces 23e, 73e of the first plate-like member 24a, 74a Front end portions 24b, 74b of the second plate-like member Second Rear end portions 24d, 74d of the second plate member 24e, 74e Inward surfaces of the second plate member 25, 61, 75 First ring members 26, 62, 76 second Ring-shaped member A Axis direction B Radial direction B1, B2 Inclination direction X axis

Claims (4)

  A writing instrument characterized by a gripping part, comprising: an elastic body; a plurality of hard plate-like members arranged in a circumferential direction so as to cover an outer peripheral surface of the elastic body; and a front end portion in an axial direction of the plate-like member; A writing instrument comprising: a grip portion having first and second ring-shaped members that respectively stop rear end portions.   The writing instrument according to claim 1, wherein the plate-like member is composed of at least two types of plate-like members, and is alternately arranged in the circumferential direction on the outer peripheral surface of the elastic body.   The plate-shaped member has first and second plate-shaped members, and the outward surface of the first plate-shaped member is smaller than the inward surface of the first plate-shaped member, whereas the second plate The writing instrument according to claim 2, wherein an outward surface of the member is larger than an inward surface of the second plate member.   The writing instrument according to claim 3, wherein a thickness of the first plate-shaped member in a radial direction is larger than a thickness of the second plate-shaped member in a radial direction.

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