JP6267893B2 - Writing instrument - Google Patents

Description

  The present invention relates to a writing instrument, and more particularly, to a retractable writing instrument in which a writing part at the front end of a refill is projected and retracted from a front end opening of a main body shaft.

  A conventional retractable writing instrument causes a writing portion to protrude and retract from a front end opening formed at the front end by pressing or releasing a knock member provided at the rear end. Since the writing part can be easily moved in and out by such an operation, for example, when the retractable writing instrument is inserted into the pocket of the shirt, when the operation such as bending the upper body is performed, the knock member is not intended. When pressed, the writing part protrudes from the front end opening, and the writing part may touch the fabric inside the pocket and stain the clothes. Similarly, when the retractable writing instrument is put in a bag or the like, the writing part may unintentionally protrude from the front end opening, and the inside of the bag or the contents of the bag may be soiled.

  Patent Document 1 discloses a retractable writing instrument having a mechanism for preventing such an unintended writing portion from protruding. In this retractable writing instrument, the forward movement of the knock member is restricted by rotating the operation member provided on the outer periphery of the knock member in one direction and slidingly inserting the protrusion into the engagement groove. Protrusion of the writing part that does not can be prevented. In this state, by removing the protruding portion from the engaging groove, the knock member can be moved forward, so that the writing portion can be moved up and down.

JP 2010-131777 A

  However, in the retractable writing instrument described in Patent Document 1, in order to restrict the forward movement of the knock member, an operation of rotating the operation member is required, and the forward movement of the knock member is restricted. When the writing part is to be protruded from the hook, it is necessary to operate the knock member after releasing the restriction by performing the operation of removing the protruding part from the engaging groove, and the operation of protruding the writing part becomes complicated There was a problem.

  This invention was made in order to solve such a problem, and it aims at providing the writing instrument which can project a writing part easily from the state which prevents the protrusion of an unintended writing part.

The writing instrument according to the present invention has a front cylinder having a front end and a rear end, and having a front end opening at the front end, a refill accommodated in the axial cylinder, and a pressing member provided to be slidable in the axial direction of the axial cylinder. The writing member in which the writing part at the front end of the refill protrudes from the front end opening by sliding the pressing member in the axial direction of the axial cylinder and pressing the refill, and the pressing member moves in the radial direction of the axial cylinder The shaft cylinder is provided with a slide hole so as to extend in the axial direction, and the slide hole is adjacent to the first hole and the first hole on the front end side of the first hole. A second portion having a width smaller than the width of the first hole, the stopper member being insertable into the first hole and having a width larger than the width of the second hole; Provided radially outward of the shaft cylinder with respect to the first portion, And a second portion that can be inserted into the second hole with a width smaller than a minute width, and the second portion is positioned in the first hole by pressing the stopper member radially inward of the shaft tube. In this state, when the pressing member is slid toward the front end side, the second portion slides along the second hole.
The pressing member further includes an elastic member that pushes the stopper member toward the radially outward direction of the shaft tube, and the elastic member pushes the stopper member toward the radially outward direction of the shaft tube so that at least the first portion is A portion may be located in the first hole.
An outer member located outside the shaft tube is attached to the pressing member, and the stopper member may contact the outer member from the rear end side with respect to the outer member. The outer member may be a clip.

  According to this invention, when the stopper member is pressed toward the inner side in the radial direction of the shaft cylinder, when the pressing member is slid toward the front end side with the second portion positioned in the first hole, the second portion is Since the refill moves to the front end side by sliding along the second hole, it is possible to easily project the writing part from a state in which the unintended writing part is prevented from projecting.

It is a top view of the writing instrument which concerns on embodiment of this invention. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. It is the elements on larger scale of the rear side of the axial cylinder of the writing instrument which concerns on this embodiment. It is sectional drawing along the VV line of FIG. It is the top view and side view of the stopper member of the writing instrument which concern on this embodiment. It is sectional drawing along the VII-VII line of FIG. It is sectional drawing of the state which pushed the stopper member of the writing instrument which concerns on this embodiment in the radial direction inside of the axial cylinder. In the writing instrument which concerns on this embodiment, it is sectional drawing of the part of the back side of the state which made the writing part protrude from the front-end opening. It is sectional drawing along the XX line of FIG. It is a front view of the cylindrical body of the writing instrument which concerns on this embodiment. It is a front view of the rotation member of the writing instrument which concerns on this embodiment. It is sectional drawing of the rear axis | shaft of the writing instrument which concerns on this embodiment.

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 2 including a front shaft 3 and a rear shaft 4. On the front side of the front shaft 3, a front end portion 5 whose outer diameter gradually decreases toward the front side is integrally formed.

  As shown in FIG. 2, the front end 2 a of the front shaft 3 is provided with a front end opening 6. A disc-shaped partition plate portion 7 that protrudes radially outward from the outer surface of the front shaft 3 is provided at a position slightly rearward of the center with respect to the axial direction of the front shaft 3. Portions other than the portion 5 are partitioned by a partition plate portion 7 into a front shaft front portion 3a and a front shaft rear portion 3b. The outer peripheral surface of the front shaft front portion 3a is covered with a grip 11 made of an elastic material such as rubber. A thread 8 is formed on the outer peripheral surface of the front shaft rear portion 3b. A thread groove 10 having an appropriate length is formed on the inner peripheral surface of the rear shaft 4 from the front end portion of the rear shaft 4 toward the rear end 2b. The front shaft rear portion 3b is inserted into the rear shaft 4 through the opening at the front end of the rear shaft 4, and the screw thread 8 and the screw groove 10 are screwed together so that the front shaft 3 and the rear shaft 4 are connected. The shaft cylinder 2 is configured by being connected.

  A refill 20 of a ballpoint pen is accommodated in the shaft cylinder 2. A writing unit 22 is provided at the front end of the refill 20. The refill 20 has a shape in which the outer diameter gradually increases from the front side toward the rear side, and a stepped portion is formed in each portion where the outer diameter changes. One end of a spring 14 that is housed in the shaft tube 2 and into which the refill 20 is inserted is in contact with the step portion 13 that is one of the step portions. The other end of the spring 14 is in contact with a step 15 formed on the inner peripheral surface of the front end portion 5. The spring 14 pushes the refill 20 rearward by its elastic force.

  As shown in FIG. 3, a pressing member 30 is housed inside the shaft tube 2 behind the refill 20. A clip 32, which is an outer member extending in the axial direction of the shaft tube 2, is integrally formed on the pressing member 30 via the connecting portion 31. That is, the connecting portion 31 is formed to extend from the inside of the shaft tube 2 to the outside of the shaft tube 2 through a slide hole 40 described later in detail. The clip 32 is provided with a ball portion 32 a protruding toward the rear shaft 4 on the surface facing the rear shaft 4. The outer surface of the rear shaft 4 is provided with a guide groove 4a that extends in the axial direction of the rear shaft 4 and is recessed with respect to the outer surface of the rear shaft 4, and a part of the ball portion 32a is a guide groove. 4a. The pressing member 30 includes an insertion shaft portion 33 that extends in the axial direction of the shaft tube 2 inside the shaft tube 2 and is integrally formed with the pressing member 30. The insertion shaft portion 33 is inserted into a cylindrical body 34, which will be described in detail later, from the rear side, and an insertion cylinder portion 37 of a rotating member 35, which will be described later in detail, is inserted into the cylindrical body 34 from the front side. Inside 34, the insertion shaft portion 33 of the pressing member 30 is inserted into the insertion tube portion 37 of the rotation member 35 from the rear side. The refill 20 is inserted into the rotating member 35 from the front side. A tail plug 29 having a vent hole (not shown) through which the inside and the outside of the refill 20 can vent is attached to the rear end of the refill 20, and the tail plug 29 abuts against the rotating member 35 inside the rotating member 35. ing. With such a configuration, the pressing member 30 is connected to the refill 20 indirectly, that is, via the cylindrical body 34 and the rotating member 35.

  A rear end portion 9 having an outer diameter smaller than the outer diameter of other portions is integrally formed on the rear side of the rear shaft 4. A rear end opening 16 is provided at the rear end 2 b of the rear shaft 4, and a rear end cap 12 is put on the rear end portion 9 so as to close the rear end opening 16. The outer diameter of the rear end cap 12 is the same as the outer diameter of the portion other than the rear end portion 9 of the rear shaft 4, and the rear end cap 12 is put on the rear end portion 9, so The outer diameter up to the cap 12 is uniform.

  As shown in FIG. 4, the rear shaft 4 is provided with an elongated slide hole 40 communicating with the inside of the shaft tube 2. The slide hole 40 extends from the rear end of the rear end cap 12 in the axial direction of the rear shaft 4. The slide hole 40 is provided so as to be collinear with the guide groove 4a, and an appropriate interval is provided between the slide hole 40 and the guide groove 4a.

  As shown in FIG. 5, the slide hole 40 has an outer surface hole 41 formed in the rear end cap 12 and the rear shaft 4, and a first width formed in the rear end portion 9 having a larger width than the outer surface hole 41. The hole 42 includes a second hole 43 that is provided adjacent to the first hole 42 on the front side of the first hole 42 and has the same width as the outer surface hole 41. The first hole 42 and the second hole 43 are located radially inward of the shaft cylinder 2 with respect to the outer surface hole 41, and the second hole 43 and the outer surface hole 41 are located so as to coincide with each other. The first hole 42 is positioned so as to communicate with the outer surface hole 41. At the boundary between the first hole 42 and the second hole 43, a stepped portion 44 is formed that is configured by the difference in width between the two.

Referring to FIG. 3 again, the pressing member 30 is provided with a spring accommodating chamber 51 that opens toward the slide hole 40. A spring 52, which is an elastic member , is accommodated in the spring accommodating chamber 51. A part of the spring 52 is inserted into the spring accommodating chamber 51 and is pushed outward in the radial direction of the shaft tube 2 by the elastic force of the spring 52. A stopper member 60 is provided. The stopper member 60 is provided so as to extend from the inside of the shaft tube 2 to the outside via the slide hole 40, and is in contact with the connecting portion 31 and the clip 32 from the rear side.

As shown in FIG. 6A, the stopper member 60 includes a first portion 61, a second portion 62, and a pushing portion 63. The first part 61 extends perpendicularly to the second part 62 and is connected to the contact part 61a connected to the second part 62. One side surface portion 61b, 61b, and a thin plate-like member 61c provided to connect to the contact portion 61a and the two side surface portions 61b, 61b are provided. The contact portion 61a, the two side portions 61b and 61b, and the thin plate member 61c constitute a spring receiving chamber 64 that is a space in which the spring 52 (see FIG. 3) can be received. Width w ₁ is the distance between the outer surface of each side portion 61b, the degree is smaller than the width of the first hole 42 is larger than the width of the second hole 43, that is, the first hole 42 (see FIG. 4 or 5) The first portion 61 can be inserted into the second hole 43 (see FIG. 5), but the first portion 61 cannot be inserted into the second hole 43 (see FIG. 5). The width w ₂ of the second portion 62 is equal to or less than the width of the second hole 43, that is, a distance that allows the second portion 62 to be inserted into the second hole 43. The pushing portion 63 is located on the opposite side of the first portion 61 with respect to the second portion 62. As shown in FIG. 6B, the surface of the pressing portion 63 on the side where the thin plate member 61c is provided is in the direction opposite to the first portion 61 with respect to the second portion 62, that is, the end surface. An inclined surface 65 is formed so as to be inclined so that the thickness of the pushing portion 63 is reduced toward 66.

  As shown in FIG. 7, in the spring accommodating chamber 51, the spring 52 pushes the contact portion 61 a by its elastic force, whereby the stopper member 60 is pushed outward in the radial direction of the shaft tube 2. As a result, at least a part of the contact portion 61a of the stopper member 60 is positioned outside the spring accommodating chamber 51, and is positioned so as to overlap the stepped portion 44 when viewed in the axial direction of the shaft cylinder 2. It will be. Even if the stopper member 60 is pushed toward the front side of the writing instrument 1 in this state (from the front side to the back side with respect to the paper surface of FIG. 7), at least a part of the abutting portion 61 a hits the stepped portion 44. Cannot be moved to the front side of the writing instrument 1 together with the clip 32. That is, when the user of the writing instrument 1 does not touch the stopper member 60, the pressing member 30 cannot be moved to the front side of the writing instrument 1. As a result, the pressing member 30 cannot press the refill 20 (see FIG. 2 or 3) to the front side of the writing instrument 1, so that the writing unit 22 (see FIG. 2) is not intended to perform the front end without performing a special operation. Protruding from the opening 6 (see FIG. 2) can be prevented.

  As shown in FIG. 8, when the user of the writing instrument 1 pushes the pushing portion 63 of the stopper member 60 inward in the radial direction of the shaft tube 2 against the elastic force of the spring 52, the shaft tube 2. With respect to the axial direction, the contact portion 61 a of the stopper member 60 is positioned radially inward of the shaft tube 2 relative to the stepped portion 44. That is, the entire first portion 61 is accommodated in the shaft tube 2. Further, the second portion 62 of the stopper member 60 is positioned so as to overlap the connecting portion 31 (see FIGS. 6A and 6B) in the axial direction of the shaft tube 2 and is positioned in the second hole 43. It becomes like this. When the user of the writing instrument 1 moves the stopper member 60 to the front side of the writing instrument 1, the clip 32 and the connecting portion 31 that are in contact with the stopper member 60 also move to the front side of the writing instrument 1, and the connecting portion 31 and the second portion 62 are in the second hole. It moves to the front side of the writing instrument 1 along 43. As a result, as shown in FIG. 9, the stopper member 60, the clip 32, the connecting portion 31, and the pressing member 30 can all move to the front side of the writing instrument 1. If the clip 32 and the connecting portion 31 can move to the front side of the writing instrument 1, the pressing member 30 can also move to the front side of the writing instrument 1, so that the refill 20 moves to the front side of the writing instrument 1 by the pressing member 30. The writing unit 22 (see FIG. 2) can protrude from the front end opening 6 (see FIG. 2). In addition, when the clip 32 moves to the front side of the writing instrument 1, the ball part 32a (refer FIG. 3) of the clip 32 moves along the guide groove 4a (refer FIG. 3).

  As shown in FIG. 10, when the user of the writing instrument 1 pushes the pushing portion 63 of the stopper member 60 and moves the stopper member 60 together with the clip 32 and the connecting portion 31 to the front side of the writing instrument 1, the user While the stopper member 60 is pushed inward in the radial direction of the shaft cylinder 2 by bringing the finger base portion 71 of the finger portion into contact with the end side surface 66 of the stopper member 60, The stopper member 60 can be pushed toward the front side of the writing instrument 1 by bringing the portion 72 closer to the fingertip than the portion 71 into contact with the inclined surface 65 of the stopper member 60. That is, the user can perform the operation of pushing the stopper member 60 and the operation of pushing the stopper member 60 toward the front side of the writing instrument 1 separately, not together, that is, as one operation. As a result, the writing unit 22 can be easily projected from the state where the writing unit 22 (see FIG. 2) is prevented from protruding.

  As shown in FIG. 11, the cylindrical body 34 has cam teeth 34a formed at the front end thereof, and a plurality of guide protrusions 34b formed on the outer surface thereof. As shown in FIG. 12, the rotating member 35 includes a plurality of protrusions 36 extending in the front-rear direction on the outer surface thereof. Further, as shown in FIG. 13, a cam portion 80 is formed on the inner peripheral surface of the rear shaft 4 slightly in front of the rear end portion 9. The cam portion 80 includes a plurality of serrated cam teeth 80a protruding toward the front side and a plurality of cam grooves 80b formed between adjacent cam teeth 80a and extending in the front-rear direction.

  11 to 13, when the cylindrical body 34 and the rotating member 35 are disposed in the rear shaft 4, the protrusion 36 engages with the cam teeth 80 a and the cam groove 80 b of the cam portion 80. As already described, the pressing member 30 (see FIG. 3) slides forward to project the writing portion 22 (see FIG. 2) from the front end opening 6 (see FIG. 2). The 35 protrusions 36 move toward the front side along the cam groove 80b. At this time, the rotating member 35 is rotated by a certain angle with respect to the cam portion 80 by the contact between the cam teeth 34 a of the cylindrical body 34 and the protrusion 36 of the rotating member 35. Thereby, the protrusion 36 of the rotating member 35 is engaged with the cam teeth 80a of the cam portion 80, and the state where the writing portion 22 protrudes from the front end opening 6 is maintained.

  When the writing member 22 protrudes from the front end opening 6 and the pressing member 30 is slid toward the front side by moving the clip 32 to the front side, the cylindrical body 34 presses the rotating member 35 toward the front side, and the cylinder The rotating member 35 is rotated by a certain angle with respect to the cam teeth 80 a of the cam portion 80 by the contact between the cam teeth 34 a of the body 34 and the protrusion 36 of the rotating member 35. Thereby, the engagement state between the protrusion 36 and the cam teeth 80a of the cam portion 80 is released, and the protrusion 36 moves toward the rear side along the cam groove 80b of the cam portion 80 by the elastic force of the spring 14. To do. As the rotary member 35 moves toward the rear side, the refill 20 (see FIG. 2) moves toward the rear side, and the writing unit 22 is immersed in the shaft tube 2 (see FIG. 2).

  In this way, by pressing the stopper member 60 inward in the radial direction of the shaft cylinder 2, when the pressing member 30 is slid toward the front end 2a with the second portion 62 positioned in the first hole 42, Since the second portion 62 slides along the second hole 43 and the refill 20 moves toward the front end 2a, the writing portion 22 can be easily removed from the state in which the unintentional writing portion 22 is prevented from protruding. Protrusion can be performed.

  In this embodiment, by always pressing the stopper member 60 outward in the radial direction of the shaft tube 2 by the elastic force of the spring 52, if the stopper member 60 is not pressed, an unintended protrusion of the writing portion 22 is caused. Although it has always been prevented, it is not limited to this form. Without using the spring 52, the stopper member 60 can be slid so that it can take two positions: a position where the unintended writing part 22 is prevented from protruding and a position where the state is released. It may be provided. Even in this modified example, since the operation of projecting the writing unit 22 from the state in which the projection of the writing unit 22 is prevented is the same as that of the embodiment, it is easy from the state in which the unintended projection of the writing unit 22 is prevented. The writing portion 22 can be projected.

  In this embodiment, the clip 32 is formed integrally with the pressing member 30 via the connecting portion 31, but this embodiment is not limited thereto. The clip 32 may be fixed to the rear shaft 4 separately from the pressing member 30, and the pressing member 30 may be slid in the front-rear direction by moving the stopper member 60 in the front-rear direction.

  In this embodiment, the refill 20 is a ballpoint pen, but may be another type of refill such as a mechanical pencil.

  DESCRIPTION OF SYMBOLS 1 Writing instrument, 2 shaft cylinder, 2a Front end (front shaft 3), 2b (Rear shaft 4) rear end, 6 Front end opening, 20 Refill, 22 Writing part, 30 Press member, 32 Clip (outer member), 40 Slide Hole, 42 1st hole, 43 2nd hole, 52 Spring (elastic member), 60 Stopper member, 61 1st part, 62 2nd part.

Claims (4)

A shaft cylinder having a front end and a rear end, and having a front end opening at the front end;
A refill stored in the barrel;
A pressing member slidably provided in the axial direction of the axial tube, and the pressing member slides in the axial direction of the axial tube to press the refill, whereby the writing portion at the front end of the refill is A writing instrument protruding from the front end opening,
The pressing member includes a stopper member movable in the radial direction of the shaft tube,
The shaft tube is provided with a slide hole so as to extend in the axial direction,
The slide hole is
A first hole;
A second hole provided adjacent to the first hole on the front end side of the first hole and having a width smaller than the width of the first hole;
The stopper member is
A first portion insertable into the first hole and having a width greater than the width of the second hole;
A second portion that is provided radially outward of the shaft tube with respect to the first portion, and has a width smaller than the width of the first portion and can be inserted into the second hole;
When the pressing member is slid toward the front end side with the second portion positioned in the first hole by pressing the stopper member radially inward of the shaft cylinder, the second portion A writing instrument that slides along the second hole. The pressing member further includes an elastic member that presses the stopper member toward the radially outer side of the shaft tube,
Elastic member, writing instrument of claim 1 wherein the stopper member by pushing radially outward of said barrel, at least a portion of the first portion is positioned in the first bore.   The outer member located on the outer side of the axial cylinder is attached to the pressing member, and the stopper member is in contact with the outer member from the rear end side with respect to the outer member. Writing instruments.   The writing instrument according to claim 3, wherein the outer member is a clip.

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