JP2014231214A - Writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument which can be attached with a compact ornament.SOLUTION: A mounting hole 38 is formed at a rear end part 33 of a pressing member. By inserting an insertion portion 63 of an earphone jack 60 at the mounting hole 38, the earphone jack 60 is attached to the rear end part 33 of the pressing member.

Description

  The present invention relates to a writing instrument, and more particularly to a writing instrument to which an ornament can be attached.

  In order to satisfy a consumer's hobby, the writing instrument is sometimes attached with a decorative article such as a character at the rear end portion of the shaft of the writing instrument. For example, Patent Document 1 discloses a knock-type ballpoint pen with such an ornament. The ornament is attached to a knock portion that protrudes from the rear end of the shaft tube and can be pushed toward the front end of the shaft tube. The decorative article is formed with a cylindrical hole having an inner diameter substantially the same as the outer diameter of the knock portion, and the decorative article is attached to the knock portion by inserting the knock portion into the hole.

JP 2005-305925 A

  However, since the knock portion is inserted into the hole, the portion of the ornament in which the hole is formed has an outer diameter larger than the outer diameter of the knock portion, which gives the impression that the ornament is bulky. There was a risk of adverse effects on aesthetics.

  This invention was made in order to solve such a problem, and it aims at providing the writing instrument which can attach a compact ornament.

The writing instrument according to the present invention is a writing instrument having a front end portion on the side where the writing portion is located and a rear end portion opposite to the front end portion, and an attachment hole portion formed in the rear end portion, and an attachment hole portion And a decorative article having an insertion portion to be inserted into the mounting portion, and the decorative article is attached to the rear end portion by inserting the insertion portion into the attachment hole portion.
A shaft cylinder having a front end opening and a rear end opening; a refill accommodated in the shaft cylinder and having a writing portion; and a pressing member inserted into the shaft cylinder from the rear end opening, the pressing member holding the refill at the front end A pressing member in which the writing part protrudes from the front end opening by pressing toward the opening may be provided, and the rear end part may be a portion protruding from the rear end opening in the pressing member.
The ornament may be an earphone jack.

  According to this invention, since the ornament is attached to the rear end by inserting the insertion portion of the ornament into the attachment hole formed in the rear end of the writing instrument, a compact ornament can be attached. .

It is a writing instrument which concerns on embodiment of this invention, Comprising: The refill of a mechanical pencil is accommodated in a shaft cylinder, and it is sectional drawing of the state in which the writing part of a refill exists in a shaft cylinder. It is a writing instrument which concerns on embodiment of this invention, Comprising: The refill of a mechanical pencil is accommodated in a shaft cylinder, It is sectional drawing of the state which the writing part of the refill protruded from the front-end opening of the shaft cylinder. It is a writing instrument which concerns on embodiment of this invention, Comprising: It is sectional drawing of the state which accommodates the refill of a ball-point pen in a shaft cylinder, and the writing part of a refill exists in a shaft cylinder. It is a writing instrument which concerns on embodiment of this invention, Comprising: The refill of a ball-point pen is accommodated in a shaft cylinder, It is sectional drawing of the state which the writing part of the refill protruded from the front-end opening of the shaft cylinder. It is sectional drawing of the state which attached the cap which does not have decoration to the rear-end part of the writing instrument which concerns on embodiment of this invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiments of the present invention will be described below with reference to the accompanying drawings. In the description, the writing unit 22 side is described as the “front” side, and the opposite side (the pressing member 30 side) is described as the “rear” side.
As shown in FIG. 1, the writing instrument 1 includes a shaft cylinder 10 having a front end opening 1 a at the front end and a rear end opening 1 b at the rear end, and a refill that has a writing portion 22 at the front end and is accommodated in the shaft cylinder 10. 20 and a pressing member 30 inserted into the shaft cylinder 10 from the rear end opening 1b, and constitutes a mechanical pencil. In the writing instrument 1, the side on which the writing unit 22 is located is referred to as the front end 2 of the writing instrument 1, and the opposite side is referred to as the rear end 3 of the writing instrument 1. In this embodiment, the rear end portion 3 corresponds to a portion of the pressing member 30 that protrudes from the rear end opening 1 b, that is, the pressing member rear end portion 33.

  The shaft cylinder 10 includes a front shaft 12 having a front end opening 1a at a front end and a rear shaft 13 having a rear end opening 1b at a rear end. An opening 12b is provided at the rear end of the front shaft 12, and a thread groove 11 having an appropriate length is formed on the inner peripheral surface of the front shaft 12 from the opening 12b toward the front end opening 1a. A substantially cylindrical small-diameter portion 14 is provided at the front end portion of the rear shaft 13, and a screw thread 15 is formed on the outer peripheral surface of the small-diameter portion 14. The small-diameter portion 14 is inserted into the front shaft 12 through the opening 12b of the front shaft 12, and the screw thread 15 and the screw groove 11 are screwed together, whereby the front shaft 12 and the rear shaft 13 are connected to each other. 10 is configured.

  The refill 20 is housed in the rear shaft 13 at a part on the rear end side, and the remaining portion on the front end side of the refill 20 protruding from the small diameter portion 14 is housed in the front shaft 12. It is stored inside. The inner diameter of the front shaft 12 is substantially the same as the outer diameter of the small diameter portion 14, and there is a gap between the refill 20 and the inner peripheral surface of the front shaft 12. In the vicinity of the front end opening 1a, a reduced diameter portion 12a is formed in which the inner diameter of the front shaft 12 gradually decreases toward the front end opening 1a. The interior of the rear shaft 13 includes a first portion 13a, a second portion 13b adjacent to the first portion 13a, and a third portion adjacent to the second portion 13b from the small diameter portion 14 toward the rear end of the rear shaft 13. 13c. The first portion 13a extends from the vicinity of the front end of the first portion 13a toward the rear end on the inner peripheral surface of the rear shaft 13 corresponding to the position of the first portion 13a and toward the inner side in the radial direction of the rear shaft 13. A plurality of protruding ribs 28 are formed at intervals in the circumferential direction of the inner peripheral surface of the rear shaft 13. Each of the ribs 28 is such that the refill 20 is slidable in the axial direction in the first portion 13a when an inscribed circle that is in contact with each rib 28 (perpendicular to the axial direction of the rear shaft 13) is virtually drawn. It has a height that is the inner diameter of the inscribed circle. The second portion 13b is formed with a plurality of ribs 29 connected to the rear end of the rib 28 and extending to the rear end of the second portion 13b on the inner peripheral surface of the rear shaft 13 corresponding to the position of the second portion 13b. It is constituted by. Each of the ribs 29 has an inner diameter gradually increasing toward the rear end side of the rear shaft 13 when an inscribed circle in contact with each rib 29 (perpendicular to the axial direction of the rear shaft 13) is virtually drawn. It has a height that increases. In other words, the rib 29 is formed in a tapered shape. The third portion has an inner diameter such that the pressing member 30 can slide in the axial direction. A step 17 is formed between the first portion 13a and the second portion 13b by changing the height of each of the ribs 28 and 29, that is, the inner diameter of the inscribed circle of each of the ribs 28 and 29. . A stepped portion 18 is formed by the rear end portion of the rib 29 between the second portion 13b and the third portion 13c.

  A spring 40 that is an elastic member is provided inside the rear shaft 13, and the refill 20 is inserted into the spring 40. A disc-shaped front end surface portion 31 provided at the front end of the pressing member 30 has a substantially cylindrical insertion protrusion 61 that can be inserted into a hole (not shown) opened at the rear end of the refill 20, and a rear end of the refill 20. A substantially cylindrical shaft portion 62 having an outer diameter larger than the inner diameter of the opening hole is provided. The refill 20 and the pressing member 30 are connected by inserting the insertion protrusion 61 into the hole opened at the rear end of the refill 20. At this time, since the outer diameter of the shaft portion 62 is larger than the inner diameter of the hole opened at the rear end of the refill 20, the shaft portion 62 is brought into contact with the rear end surface of the refill 20 without being inserted into the hole. . At one end of the spring 40 in which the refill 20 is inserted, the shaft portion 62 is inserted into the inner diameter portion of the spring 40. The other end of the spring 40 is fitted into the front end portion of the rib 29 formed in a tapered shape, and is fixed to the stepped portion 17.

  The writing portion 22 at the front end of the refill 20 is composed of a cylindrical first portion 22a, a frustoconical second portion 22b, and a cylindrical third portion 22c, which extend from the front end to the rear end of the refill. Are provided sequentially. A step portion 23 is provided between the third portion 22c and the other portion of the refill 20 on the rear end side.

  The pressing member 30 includes a substantially cylindrical pressing member main body 32 provided so as to be adjacent to the front end surface portion 31 and a substantially cylindrical pressing member rear end portion 33 provided so as to be adjacent to the pressing member main body 32. Have. The pressing member main body 32 is formed with two elongated opening grooves 34 and 35 extending in the longitudinal direction of the pressing member main body 32. One opening groove 34 is provided with an engaging portion 37 that protrudes radially inward of the pressing member main body 32. The front end of the pressing member rear end portion 33 has a closed shape, and the rear end is open, whereby an attachment hole 38 is formed in the pressing member rear end portion 33. The earphone jack 60 is attached to the pressing member rear end portion 33 by inserting the insertion portion 63 of the earphone jack 60 which is a decorative article into the attachment hole 38. Accordingly, the strawberry-shaped decorative portion of the earphone jack 60 protrudes from the rear end of the pressing member rear end portion 33 without covering the outer peripheral surface of the pressing member rear end portion 33 with a part of the earphone jack 60. Therefore, the writing instrument 1 gives an impression that the compact earphone jack 60 is attached.

  A locking member 50 is provided inside the pressing member body 32 so as to be slidable with respect to the pressing member body 32. The locking member 50 has a substantially “U” -shaped cross-sectional shape. One end portion of the locking member 50 is provided with an engagement tip portion 51 that inclines toward the inner side in the radial direction of the pressing member body 32 toward the rear end side of the pressing member body 32. In a state where the entire refill 20 is housed in the shaft tube 10, the engaging portion 37 is received on the inclined engaging portion 51. Further, the distal end portion 51 a of the engagement tip portion 51 having an acute-angle cross-sectional shape can be brought into contact with the inner peripheral surface (third portion 13 c) of the rear shaft 13 through the opening groove 34. At the other end of the locking member 50, a fulcrum end 52 having a substantially circular cross-sectional shape is provided. The fulcrum end 52 is formed so as to be able to contact the inner peripheral surface of the rear shaft 13 through the opening groove 35. A gap S is provided between the locking member 50 and the pressing member rear end portion 33.

  Further, the locking member 50 is provided with a protrusion 53 that protrudes outward in the radial direction of the pressing member main body 32 so as to be adjacent to the engagement destination portion 51. The rear shaft 13 is provided with a hole 16, a protrusion 53 is inserted into the hole 16, and a part of the protrusion 53 protrudes radially outward from the outer peripheral surface of the rear shaft 13. Here, when the user of the writing instrument 1 pushes the protrusion 53 protruding from the rear shaft 13 toward the inner side in the radial direction of the rear shaft 13, the fulcrum end portion 52 in contact with the inner peripheral surface of the rear shaft 13. The locking member 50 is deformed so that the cross-sectional shape of the substantially “U” shape of the locking member 50 is crushed with fulcrum as a fulcrum. Since this deformation is based on the elasticity of the material forming the locking member 50, it is a reversible deformation. That is, when the user stops pushing the protrusion 53, the locking member 50 is restored to its original shape. While the locking member 50 is deformed in this way, the distal end portion 51a is moved radially inward of the rear shaft 13.

Next, the operation | movement at the time of use of the writing instrument 1 is demonstrated.
In the state shown in FIG. 1, that is, in a state where the entire refill 20 is housed in the shaft tube 10, the user of the writing instrument 1 pushes the earphone jack 60 toward the front end of the shaft tube 10, thereby pressing the member 30. Moves in the shaft tube 10 toward the front end of the shaft tube 10. Since the pressing member 30 is connected to the refill 20, the refill 20 also moves in the shaft tube 10 toward the front end of the shaft tube 10 with such movement of the pressing member 30. As a result, as shown in FIG. 2, the writing portion 22 of the refill 20 protrudes from the front end opening 1a. In the writing part 22, the first part 22a and the second part 22b and a part of the third part 22c protrude from the front end opening 1a, and the step part 23 is caught by the reduced diameter part 12a in this state. The writing part 22 does not protrude from the front end opening 1a any more.

  When the pressing member 30 moves in this way, the spring 40 having one end supported by the shaft portion 62 and the front end surface portion 31 and the other end fixed to the stepped portion 17 is compressed. In the state of FIG. 2, the spring 40 is in a state of pressing the pressing member 30 toward the rear end opening 1 b by its elastic force.

  Even when the pressing member 30 moves toward the front end of the shaft cylinder 10, the locking member 50 provided inside the pressing member main body 32 has the protrusion 53 inserted into the hole 16. Never move. When the pressing member 30 moves toward the front end of the shaft tube 10 without moving the locking member 50, the engaging portion 37 provided on the pressing member main body 32 moves toward the front end of the shaft tube 10. The part 37 moves toward the tip part 51 a along the engagement destination part 51. Eventually, the engaging portion 37 passes through the tip portion 51a and is positioned on the front end side of the shaft tube 10 with respect to the tip portion 51a. Since the pressing member 30 is pressed toward the rear end opening 1b by the spring 40, the engaging portion 37 comes into contact with the tip portion 51a, and the pressing member 30 stops at this position. As a result, the state where the writing part 22 of the refill 20 protrudes from the front end opening 1a is maintained.

  Further, since the pressing member 30 moves toward the front end of the shaft tube 10 without the locking member 50 moving, the interval S ′ between the locking member 50 and the pressing member rear end portion 33 is the interval S (FIG. 1). As a result, when the user of the writing instrument 1 further pushes the earphone jack 60 toward the front end of the shaft tube 10, the pressing member 30 is moved toward the front end of the shaft tube 10 without moving the locking member 50 by the distance S ′. Can be moved further. Then, the refill 20 is further pushed toward the front end of the shaft tube 10 by the pressing member 30, but since the step portion 23 is caught by the reduced diameter portion 12 a, the refill 20 as a whole is further on the front end of the shaft tube 10. It doesn't move towards. However, the refill 20 is provided with a spring 24 for causing a mechanical pencil core (not shown) accommodated in the refill 20 to protrude from the first portion 22 a of the writing unit 22. The spring 24 is compressed by being pushed toward the front end of the cylinder 10. As a result, the core of the mechanical pencil protrudes from the first portion 22a of the writing portion 22 protruding from the front end opening 1a, and the writing instrument 1 can be written.

  When the user pushes the protrusion 53 toward the inside in the radial direction of the rear shaft 13 with the writing part 22 protruding from the front end opening 1a, the locking member 50 is deformed as described above, and the tip part 51a moves to the inside in the radial direction. When the front end 51a in contact with the engaging portion 37 is positioned on the radially inner side of the rear shaft 13 with respect to the engaging portion 37, the pressing member is pressed toward the rear end opening 1b by the spring 40. 30 moves toward the rear end opening 1b so that the engaging portion 37 passes the front end portion 51a. Then, the refill 20 connected to the pressing member 30 is also pulled by the pressing member 30 and moves toward the rear end opening 1b, and as a result, the writing portion 22 that is in the state of FIG. It is returned into the shaft tube 10.

The writing instrument 1 can freely replace the refill in the barrel 10. Next, the operation for exchanging the refill will be described.
As shown in FIG. 1, the user holds the rear shaft 13 with one hand and rotates the front shaft 12 with the other hand, thereby removing the front shaft 12 from the rear shaft 13. Then, a state in which a part of the front end side of the refill 20 protrudes from the small diameter portion 14 is exposed. When the refill 20 is pulled in this state, the connection between the refill 20 and the pressing member 30 is released, and only the refill 20 is removed from the rear shaft 13. In this state, the spring 40 remains in the rear shaft 13 with the other end side fixed to the stepped portion 17, so that the spring 40 is not lost.

  For example, when replacing the mechanical pencil refill 20 with a ballpoint pen refill, the refill to be replaced is inserted into the small-diameter portion 14 from the rear end, and the refill is pushed toward the rear end opening 1b. Here, since the first portion 13a of the rear shaft 13 has an inner diameter that is substantially the same as the outer diameter of the refill, the refill is pushed straight along the axis of the rear shaft 13 and easily enters the spring 40. The insertion protrusion 61 is easily inserted into the hole at the rear end of the refill, and the refill and the pressing member 30 are connected. Thereafter, the front end of the refill is inserted into the front shaft 12 through the opening 12b at the rear end of the front shaft 12, and the front shaft 12 and the rear shaft 13 are connected to each other, so that the ballpoint pen shown in FIG. The writing instrument 1 in which the refill 20 ′ is accommodated in the shaft cylinder 10 is configured.

Next, an operation at the time of using the writing instrument 1 as a ballpoint pen will be described.
As in the case of the writing instrument 1 as a mechanical pencil, when the user of the writing instrument 1 pushes the earphone jack 60 toward the front end of the shaft tube 10, the refill 20 is moved along with the movement of the pressing member 30 toward the front end of the shaft tube 10. 'Also moves toward the front end of the barrel 10 and, as shown in FIG. 4, the writing portion 22' of the refill 20 'protrudes from the front end opening 1a. The configuration for maintaining this state is the same as that of the writing instrument 1 as a mechanical pencil.

  As in the case of the writing instrument 1 as a mechanical pencil, even if the writing portion 22 ′ protrudes from the front end opening 1 a, there is a space S ′ between the locking member 50 and the pressing member rear end portion 33. When the earphone jack 60 is further pushed toward the front end of the shaft tube 10 from the state of FIG. 4, the front end surface portion 31 comes into contact with the stepped portion 18, and the forward movement of the pressing member 30 is restricted, so It does not protrude from 1a, and the earphone jack 60 cannot be pushed any further. When the pressing of the earphone jack 60 is stopped, the pressing member 30 is pressed toward the rear end opening 1b by the spring 40, and the engaging portion 51 is engaged with the engaging portion 37, that is, the state shown in FIG. Return. The operation of returning the writing unit 22 ′ into the barrel 10 is the same as that of the writing instrument 1 as a mechanical pencil.

  When the user of the writing instrument 1 does not require decoration for the writing instrument 1 or when decoration is not required for using the writing instrument 1 in a formal atmosphere, the decoration is as shown in FIG. The cap member 70 having no gap can be attached to the pressing member rear end portion 33. The cap member 70 includes a columnar insertion portion 71 having an outer diameter that is substantially the same as the inner diameter of the attachment hole portion 38 and a lid portion 72 that closes the rear end of the pressing member rear end portion 33. When the cap member 70 is attached to the pressing member rear end portion 33 by being inserted into the hole 38, the rear end portion 3 of the writing instrument 1 has a substantially cylindrical pressing member rear end portion 33 having no decorative property. It protrudes from the rear end opening 1b.

  As described above, the earphone jack 60 is attached to the pressing member rear end portion 33 by inserting the insertion portion of the earphone jack 60 into the mounting hole portion 38 formed in the pressing member rear end portion 33. 60 can be attached.

  In this embodiment, the ornament is the earphone jack 60, but is not limited to the earphone jack. It may be a dedicated ornament for decorating the writing instrument 1. In addition, only by exchanging the ornaments by writing the company name, product name, promotional phrase, etc. on the ornaments, it is for advertising various companies and products, etc., despite the same writing instrument. Can be used.

  In this embodiment, the writing instrument 1 can replace the refill in the shaft tube 10, but may be a ballpoint pen or a mechanical pencil that cannot replace the refill. The writing instrument 1 is such that the shaft cylinder 10 can be separated into the front shaft 12 and the rear shaft 13, but may be an integral shaft cylinder that cannot be separated. Furthermore, although the writing instrument 1 was a retractable writing instrument with a knock mechanism, a cap is attached to the rear end of the integral shaft cylinder like a disposable ball-point pen, and an attachment hole portion into which the insertion part for the decorative article is inserted into the cap A writing instrument provided with a front shaft and a rear shaft, and a writing tool that causes the writing portion to protrude from the front end of the shaft tube by rotating the rear shaft with respect to the front shaft with respect to the axial direction, It may be a writing instrument provided with an attachment hole portion into which the ornament insertion portion is inserted at the rear end of the shaft.

  DESCRIPTION OF SYMBOLS 1 Writing instrument, 1a Front end opening, 1b Rear end opening, 2 Front end part, 3 Rear end part, 10-shaft cylinder, 20, 20 'refill, 22, 22' Writing part, 30 Press member, 38 Mounting hole part, 60 Earphone jack (Decoration), 63 Insertion part.

Claims (3)

The front end on the side where the writing part is located;
A writing instrument having a front end and a rear end opposite to the front end,
A mounting hole formed in the rear end;
A decorative article having an insertion portion to be inserted into the mounting hole portion,
A writing instrument in which the ornament is attached to the rear end portion by inserting the insertion portion into the attachment hole. A shaft cylinder having a front end opening and a rear end opening;
A refill accommodated in the barrel and having the writing part;
A pressing member inserted into the shaft cylinder from the rear end opening, wherein the pressing member pushes the refill toward the front end opening, whereby the writing member projects from the front end opening; Prepared,
The writing instrument according to claim 1, wherein the rear end portion is a portion of the pressing member that protrudes from the rear end opening.   The writing instrument according to claim 1 or 2, wherein the ornament is an earphone jack.

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