TW201941981A - Writing tool - Google Patents

Abstract

To provide a writing tool in which one of assemblies of a plurality of writing bodies and slide guides can be assembled into one of slide guide holes more easily than before. A writing tool according to an embodiment is provided with: a shaft cylinder having a plurality of slide guide holes open in a radial direction; a plurality of slide guides that are respectively assembled into the plurality of slide guide holes and slide in an axial direction; and a plurality of writing bodies that are respectively assembled into the plurality of slide guides. One of the plurality of writing bodies can be selected and caused to protrude from a tip opening of the shaft cylinder. The slide guides have an engagement protrusion extending in a circumferential direction. When the slide guides are assembled into the slide guide holes, the engagement protrusion of the slide guides or the slide guide holes elastically deform in the circumferential direction.

Description

Writing utensils

The present invention relates to a writing instrument which can be used by selecting one of plural writing characters.

It is known that a writing instrument (refer to, for example, Patent Document 1) is a multi-core writing instrument, and a plurality of writing shafts can be accommodated in the shaft tube so that these can be moved in the direction of the shaft. An operating body is connected to the rear end of the writing shaft. Each operating body is inserted into a longitudinal hole formed on the outer peripheral surface of the rear portion of the shaft tube and is slidable in the axial direction. One operating body is advanced and held at the front end side of the longitudinal hole, thereby connecting the operating body. The front end of the writing shaft protrudes from the front end of the shaft tube. The rear end of the vertical hole is closed. The operating body is configured to be freely accessible in the radial direction relative to the vertical hole. The writing shaft can be connected to the operating body. In the state, it can freely enter and exit the shaft tube through a longitudinal hole in the radial direction. In this writing instrument, the operating body can be freely moved in and out relative to the longitudinal hole in the radial direction. Therefore, when the writing shaft is exchanged, the operating body and the writing shaft connected to the operating body can be taken out from the longitudinal hole, and the operating body and Writing axis.

Prior art literature Patent literature

[Patent Document 1] Japanese Patent Laid-Open No. 2011-240555 (please refer to, for example, paragraphs 0011 and 0021).

However, it has been desired to provide a writing instrument including a shaft tube having a plurality of slide guide holes opened in a radial direction, a plurality of slide guides assembled in the plurality of slide guide holes and capable of sliding in an axial direction, and assembled in The writing body of each of the plurality of sliding guides of the plurality of sliding guides can select one of the plurality of writing bodies to make it protrude from the front mouth of the shaft tube, and it is easier to apply the pen One combination of the plurality of writing bodies and the sliding guide is assembled in one of the sliding guide holes.

An object of the present invention is to provide a writing instrument, which can more easily assemble one of a combination of a plurality of writing bodies and a sliding guide into one of the sliding guide holes.

The writing instrument of the present invention includes: a shaft tube having a plurality of sliding guide holes opened in a radial direction; a plurality of sliding guides respectively assembled in the plurality of sliding guide holes and slidable in an axial direction; and a plurality of writing bodies The sliding guides are respectively assembled on the sliding guides of the plurality of sliding guides; the pen can select one of the plurality of writing bodies to make it protrude from the front mouth of the shaft tube, and the sliding guide has a circumferential direction extending The engaging protrusion, when the sliding guide is to be assembled in the sliding guide hole, the engaging protrusion of the sliding guide or the sliding guide hole can be elastically deformed in the circumferential direction.

The plurality of states of the present invention can provide a writing instrument, which can more easily assemble one of a combination of a plurality of writing bodies and a sliding guide into one of the sliding guide holes.

1‧‧‧ multi-core pen

2‧‧‧ shaft tube

3‧‧‧ holding section

10‧‧‧ Slide guide

11‧‧‧ Slide guide with clip

11a‧‧‧pen

11a1‧‧‧ Limit slope

11b‧‧‧Body

12‧‧‧ Operating the slide guide

12a‧‧‧Operation Department

12a1‧‧‧ Limit slope

12b‧‧‧Body

21‧‧‧ front axle

21a‧‧‧front entrance

21a1‧‧‧ opening

21b‧‧‧ flange

21c‧‧‧Male Thread

22‧‧‧ rear axle

22a‧‧‧Sliding guide hole

22a1‧‧‧ leading edge

22a11‧‧‧Slide guide restricting protrusion

22b‧‧‧ rear wall

22b1‧‧‧Inner wall surface

22b2‧‧‧ rear wall protrusion

22c‧‧‧female thread

22d‧‧‧Beam

22d1‧‧‧ sidewall surface

22d11‧‧‧ subsidized wall surface

22e‧‧‧Guide

22e1‧‧‧ rear end engagement protrusion

22e2‧‧‧ rear guide

22e21‧‧‧ inclined surface of rear guide

22e22‧‧‧Chamfer

22e3‧‧‧Front guide

22e31‧‧‧Slope of front guide

22e32‧‧‧inclined side

22f‧‧‧Guide piece locking section

22g‧‧‧ annular protrusion

30‧‧‧ writing

30a‧‧‧Ink Tank

30b‧‧‧writing department

40‧‧‧Guide restriction section

40a‧‧‧Cylinder

40a1‧‧‧Gully

40a2‧‧‧hole

40b‧‧‧Spring Guide

42‧‧‧Compression spring

100‧‧‧ stick body

110‧‧‧ plate

120‧‧‧Spring engaging section

130‧‧‧ writing body engaging section

140‧‧‧Release protrusion

150‧‧‧ Disassembly protrusion

160‧‧‧ is lifted

170‧‧‧ recess

180‧‧‧ Engagement Department

200‧‧‧ Disassembly film

210‧‧‧ Radial extension

220‧‧‧ engagement protrusion

221‧‧‧inclined surface

FIG. 1 is a perspective view showing the appearance of a multi-core writing instrument according to an embodiment of the present invention. Illustration.

FIG. 2 is a cross-sectional view of the multi-core writing instrument taken along the line II-II of FIG. 1 in one embodiment of the present invention.

FIG. 3A is a front view showing a rear shaft of a multi-core writing instrument in one embodiment of the present invention.

FIG. 3B is a cross-sectional perspective view showing the rear axis of the multi-core writing instrument, taken along the line IIIB-IIIB in FIG. 3A according to one embodiment of the present invention.

3C is a cross-sectional perspective view of the multi-core writing instrument rear axis taken along line IIIB-IIIB in FIG. 3A and showing a different angle from FIG. 3B in one embodiment of the present invention.

FIG. 4A is a side view showing a slide guide including a clip in a multi-core writing instrument according to an embodiment of the present invention. FIG.

FIG. 4B is a rear view of the slide guide including the clip when viewed from the inside in the radial direction of the multi-core writing instrument according to one embodiment of the present invention.

FIG. 4C is a perspective view showing a slide guide including a pen holder in the radial direction of the multi-core writing instrument according to an embodiment of the present invention.

FIG. 5A is a side view showing an operation slide guide of a multi-core pen in one embodiment of the present invention. FIG.

FIG. 5B is a rear view showing the operation slide guide of the multi-core pen tool viewed from the inside in the radial direction in one embodiment of the present invention. FIG.

FIG. 5C is a perspective view showing the operation slide guide of the multi-core pen as viewed from the inside in the radial direction in one embodiment of the present invention.

FIG. 6A is a VIA-VIA cross-sectional view of FIG. 2 of a multi-core writing instrument in one embodiment of the present invention.

6B is a cross-sectional view taken along the line VIB-VIB of FIG. 2 of the multi-core writing instrument in one embodiment of the present invention.

7A is a cross-sectional view corresponding to the II-II cross-section of FIG. 1 in a multi-core writing instrument according to an embodiment of the present invention, showing a state in which a writing part of a writing body protrudes from an opening of a front mouth.

FIG. 7B is a sectional view of the VIIB-VIIB of FIG. 7A of the multi-core writing instrument in one embodiment of the present invention.

FIG. 8 is a perspective view showing a state in which a slide guide in which a writing body is assembled is assembled into a slide guide hole in a multi-core pen according to an embodiment of the present invention.

FIG. 9A is a view corresponding to the VIA-VIA cross-section of FIG. 2 in a multi-core writing instrument according to an embodiment of the present invention, showing a front half of the sliding guide hole assembled.

FIG. 9B is a view corresponding to the VIA-VIA cross-section of FIG. 2 in a multi-core writing instrument according to an embodiment of the present invention, showing the appearance of the second half of the slide guide hole assembled.

FIG. 10A is a view corresponding to the VIB-VIB cross-section of FIG. 2 in a multi-core writing instrument according to an embodiment of the present invention, showing the first half of the slide guide removed from the slide guide hole.

FIG. 10B is a view corresponding to the VIB-VIB cross-section of FIG. 2 in the multi-core writing instrument according to an embodiment of the present invention, showing the second half of the slide guide removed from the slide guide hole.

Forms used to implement the invention

Hereinafter, plural embodiments of the present invention will be described with reference to the drawings. The multi-core writing instrument 1 of the embodiment shown in FIG. 1 is a slide guide 10 that can be operated by sliding operation, and one of the plurality of writing bodies 30 (see FIG. 2) can be selected to move it from the front shaft of the shaft tube 2. The front mouth 21a of 21 is a writing instrument which protrudes for writing. The slide guide 10 is plurally arranged behind the rear shaft 22 of the shaft tube 2 which is formed by the front shaft 21 and the rear shaft 22 and has a slightly tubular shape. The writing body 30 can use an automatic pen in addition to the ballpoint pen core tube Any core tube such as core tube. Here, in the following description, the front axis 21 side is taken as the front of the multi-core pen 1 along the longitudinal direction of the shaft tube 2 (hereinafter referred to as the axis direction), and the opposite rear axis 22 side is taken as the rear.

As shown in FIG. 2, a grip portion 3 made of a soft material such as an elastomer is assembled on the outer periphery of the front tube 21 having a substantially tubular shape. A front port 21a with a narrowed front end is disposed at a front end portion of the front shaft 21. The writing portion of the writing body 30 can be seen through the opening portion 21a1 at the front end of the front mouth 21a. A flange 21b is formed behind the grip portion 3 of the front shaft 21. A male screw 21c is formed behind the flange 21b. The male thread 21c can be screwed with a female thread 22c of a rear shaft 22 described later, thereby connecting the front shaft 21 and the rear shaft 22.

At the front end portion of the slightly tubular rear shaft 22, a female screw 22c is formed to be screwable with the male screw 21c of the front shaft 21. The rear end of the rear axle 22 is closed by a rear wall 22b. A rear end wall protrusion 22b2 is formed in a central portion of the inner wall surface 22b1 of the rear end wall 22b so as to conically project forward. The rear wall protrusion 22b2 will be described in detail later with reference to FIG. 3B. On the front side of the rear end wall 22b, a plurality of (three) sliding guide holes 22a are formed on the outer peripheral surface of the rear shaft 22 in the radial direction. As shown in FIG. 3A, the slide guide hole 22a is a hole that is elongated in the axial direction, and is slightly rectangular. A beam-like portion 22d is formed between the sliding guide holes 22a adjacent in the circumferential direction around the axial direction.

As shown in FIGS. 3A to 3C, the side wall surface 22d1 of the beam-like portion 22d is exposed in the slide guide hole 22a. The side wall surface 22d1 protrudes from the inner peripheral surface of the rear shaft 22, and has a supplementary wall surface 22d11 (see FIG. 3C and FIG. 6B) forming a flat surface continuous with the front side surface of the side wall surface 22d1. In this way, a pair of side wall surfaces 22d1 are arranged to face each other in one slide guide hole 22a (see FIG. 3A). Further, on the inner peripheral surface of the rear shaft 22 of the front end edge 22a1 of the slide guide hole 22a, a slide guide restricting protrusion 22a11 is formed to protrude inward in the radial direction.

Guides are formed in each side wall surface 22d1 in the slide guide hole 22a facing the rear shaft 22 The part 22e and the guide part 22e protrude from each side wall surface 22d1 into the slide guide hole 22a, and extend from the inner wall surface 22b1 of the rear end wall 22b to a position ahead of the front end edge 22a1 of the slide guide hole 22a. The guide portion 22e includes a rear end engaging protrusion 22e1, a rear guide 22e2, and a front guide 22e3.

The rear-end engaging projection 22e1 protrudes from the inner wall surface 22b1 of the rear-end wall 22b and has a block shape. The rear guide 22e2 is narrower than the rear end engaging protrusion 22e1 (in other words, the rear guide 22e2 has a shape protruding from the side wall surface 22d1 smaller than the rear end engaging protrusion 22e1) and extends forward from the rear end engaging protrusion 22e1. The outer surfaces of the rear end engaging projections 22e1 and the rear guide 22e2 on the outer side in the radial direction are flat surfaces that are continuous with the outer surfaces of the corresponding rear end wall 22b on the outer side in the radial direction. A rear guide inclined surface 22e21 (see also FIG. 6A) is formed between the outer surface of the radial direction outer side of the rear guide 22e2 and the opening wall surface. The rear guide inclined surface 22e21 is inclined in the circumferential direction and is opposite to the rear guide. The opening width of the opening wall surface of the element 22e2 becomes wider toward the outside in the radial direction. A chamfered portion 22e22 is formed at the front end of the rear guide 22e2 so as to be curved outward in a radial direction. The front guide 22e3 is slightly plate-shaped, and extends forward from a position on the rear side of the chamfered portion 22e22 closer to the inner side in the radial direction than the chamfered portion 22e22. Therefore, a portion where the chamfered portion 22e22 of the rear guide 22e2 and the front guide 22e3 are connected is sharply recessed toward the rear to form a guide locking section 22f.

A front guide inclined surface 22e31 (see FIG. 6B) is formed between the inner surface of the inner side in the radial direction of the front guide 22e3 and the opening wall surface on the front side of the guide locking section 22f, and the front guide inclined surface 22e31 faces The circumferential direction is inclined, and the opening width between the opening wall surface of the opposite front guide 22e3 is narrowed toward the outside in the radial direction. In addition, the side surface (opening wall surface) of the front end portion of the front guide 22e3 forms an inclined side surface 22e32, and the width of the opening from the opening wall surface of the opposite front guide 22e3 increases toward the front. The respective structures of the slide guide holes 22a thus formed will be described in detail later.

Returning to FIG. 2, a guide restricting portion 40 is attached to a rear position of the front shaft 21 that protrudes and is assembled inside the shaft tube 2. The guide restricting portion 40 includes a cylindrical portion 40 a that is opened toward the front and has a bottomed cylindrical shape to constitute a front portion thereof, and a spring guide 40 b that protrudes from the rear of the cylindrical portion 40 a to constitute a rear portion thereof. A groove portion 40a1 is formed on the outer periphery of the cylindrical portion 40a of the guide restricting portion 40 to be fitted into an annular protrusion 22g formed on the inner peripheral surface in front of the rear shaft 22. By fitting the annular protrusion 22 g of the rear shaft 22 with the groove portion 40 a 1 of the guide restriction portion 40, the guide restriction portion 40 can be fixed to the shaft tube 2. Three holes 40a2 are formed in the bottom of the cylindrical portion 40a of the guide restricting portion 40, and three writing bodies 30 can be inserted therethrough. The compression spring 42 is arranged on the outer periphery of the writing body 30 and is compressed between the rear surface of the cylindrical portion 40 a of the guide restriction portion 40 and the slide guide 10. The elastic force of the compression spring 42 can elastically press the slide guide 10 and the writing body 30 toward the rear.

In this embodiment, a total of three slide guides 10 are arranged at equal intervals in the circumferential direction around the axis corresponding to three slide guide holes 22 a formed in the rear shaft 22. The three slide guides 10 include: A pen holder slide guide 11 having a pen holder 11a which can be used as an operation portion, and two operation slide guides 12 having an operation portion 12a protruding outward from the body in the radial direction.

As shown in FIGS. 4A to 4C, the pen holder slide guide 11 includes a body portion 11 b having a slightly rod shape, and a pen holder 11 a protruding outward from the body portion 11 b in the radial direction and extending forward through the bent portion. A restricted inclined surface 11a1 is formed on the outer peripheral surface of the front portion of the base end portion of the pen holder 11a so as to protrude toward the outer side in the radial direction as it goes rearward. The restricting inclined surface 11a1 can restrict the advancement of the slide guide 11 with a clip within a predetermined operation amount, and can restrict the inclined surface 11a1 of the slide guide 11 with a pen and the slide guide hole 22a that can protrude the writing body 30. A predetermined gap is formed between the leading edges of the. The body portion 11b includes a rod-shaped body 100 having a slightly rod-like shape. A plate-shaped portion 110 is formed on the outer side of the rod-shaped body 100 in the radial direction. The front end of the plate-shaped portion 110 is located behind the front end of the rod-shaped body 100, and the rear end thereof It protrudes rearwardly from the rear end of the rod-shaped body 100 in a long direction. The plate-like portion 110 has a plurality of sliding surfaces as will be described in detail later. The front end of the plate-shaped portion 110 and the rod-shaped body 100 form a spring engaging section 120 that engages with the compression spring 42. A writing body engaging portion 130 is formed at the front end of the rod-shaped body 100. The writing body engaging portion 130 is engaged with the writing body 30 to hold the writing body 30 and protrudes forward from the rod-shaped body 100. The base of the pen holder 11a has the same width as the plate-like portion 110 to form a substantially flat sliding surface.

Three protrusions (the release protrusion 140, the removal protrusion 150, and the removed protrusion 160) protruding from the rod-shaped body 100 are formed on the rear portion of the rod-shaped body 100 with the body portion 11b of the clip slide guide 11. Of the three protrusions, when viewed from the axial direction, the release protrusion 140 on the front side and the release protrusion 160 on the rear side have a slightly tapered triangular shape when viewed from the axial direction. The attaching and detaching protrusion 150 includes a pair of attaching and detaching pieces 200, and the pair of attaching and detaching pieces 200 extend from the rod-shaped body 100 inward in the radial direction. Each of the detachable pieces 200 sandwiches the protruding direction (radial direction) of the pair of detachable pieces 200 and faces each other, and has a slightly plate-like radial direction extending portion 210 protruding in a direction substantially orthogonal to the plate-shaped portion 110. Further, each of the detachable pieces 200 has engaging protrusions 220 extending from the end of the radial direction extending portion 210 in the circumferential direction (in this embodiment, a direction substantially orthogonal to the extending direction of the radial direction extending portion 210). The engaging protrusion 220 may protrude and extend in a circumferential direction around the axis in the multi-core writing instrument 1. An inclined surface 221 is formed on the inner surface of the engaging protrusion 220 facing the inside of the radial direction of the multi-core writing instrument 1. The inclined surface 221 is inclined in the circumferential direction so that the tip of the engaging protrusion 220 is tapered. Recesses 170 are formed at the front and rear of the detachable projection 150 so that they are notched when viewed from the side. If the notch-shaped concave portion 170 is formed, as described in detail later, the elastic deformation of the detachable protrusion 150 can be favorably promoted. A pair of engaging portions 180 are formed at the rear end of the main body portion 11b with the pen holder slide guide 11 to form recessed portions facing the side and rear of the rod-shaped body 100. The engaging portion 180 will be described in detail later.

The operation slide guide 12 shown in FIGS. 5A to 5C includes a slightly rod-shaped body portion 12b and an operation portion 12a protruding outward from the body portion 12b in the radial direction. A restricting inclined surface 12a1 is formed at the front portion of the operation portion 12a so as to be tapered sharply forward. The main body portion 12b of the operation slide guide 12 corresponds to the main body portion 11b of the pen holder slide guide 11 described above. The main body portion 12b of the operation slide guide 12 includes a rod-shaped body 100, a plate-shaped portion 110, a spring engaging portion 120, a writing body engaging portion 130, a release protrusion 140, a removal protrusion 150, a release protrusion 160, and a card.合 180.

As shown in FIG. 2, the writing body 30 has a writing portion 30 b at the front end of the ink tank 30 a. The writing body engaging portion 130 of the slide guide 10 (with the pen clip slide guide 11 and the operation slide guide 12) is press-fitted into the rear end portion of the ink tank 30a. The writing body 30 is disposed inside the shaft tube 2 in a state of being engaged with and held by the slide guide 10. The pair of sliding surfaces (first sliding surfaces) of the plate-shaped portion 110 of each of the slide guides 10 facing the inside of the radial direction of the multi-core writing instrument 1 is opposite to the slide guide hole 22a with its normal vector on the outside of the radial direction. The guide plane of the rear guide 22e2 formed by the pair of rear guides 22e2 is slidably engaged. The side surface (second sliding surface) of the plate-like portion 110 is formed as a pair of guide planes substantially orthogonal to the guide plane of the rear guide 22e2, and is formed on the beam-like portion 22d facing the sliding guide hole 22a. The side wall surface 22d1 of the beam-like portion 22d is slidably joined. Each of the slide guides 10 can be assembled in each of the slide guide holes 22 a to slide in the axial direction while being guided by the two orthogonal guide planes.

In the immersed state of the writing body 30 (a state where the slide guide 10 has been retracted), the rear end engaging protrusion 22e1 formed on the rear wall 22b of the rear shaft 22 is inserted into the card formed on the rear end of the slide guide 10 The engaging portion 180 (recessed portion) is engaged with each other. Thereby, it is possible to restrict the movement of the slide guide 10 to the outside in the radial direction. In particular, in the case of the pen holder slide guide 11, even when the multi-core pen tool 1 is suspended and supported by the pen holder 11a, the movement of the slide guide 10 outward in the radial direction can be well restricted.

When the writing portion 30b of the plurality of writing bodies 30 protrudes from the opening portion 21a1 of the front mouth 21a, one of the plurality of slide guides 10 may be selected and slid forward against the elastic force of the compression spring 42. When one of the plurality of slide guides 10 advances to a predetermined position, as shown in FIG. 7A, the rear end of the plate-shaped portion 110 of the slide guide 10 passes over the front end (chamfer) of the rear guide 22e2 of the rear shaft 22. The part 22e22 (refer FIG. 3B and FIG. 3C), the rear part of the slide guide 10 is pushed in by the operating force, and it sinks inward in a radial direction. Since the writing body 30 and the slide guide 10 are elastically pressed rearward by the compression spring 42, the rear end of the plate-shaped portion 110 of the slide guide 10 is pushed to the pair of guide locking sections 22 f of the slide guide hole 22 a. And stuck. On the other hand, since the writing body 30 is inserted into the guide restricting portion 40 in the front portion of the slide guide 10, its position in the radial direction can be maintained. Therefore, when the rear part of the slide guide 10 is closer to the axis than the front part, the slide guide 10 is inclined with respect to the axis and is locked to the guide locking section 22f. At this time, as shown in FIG. 7B, the pair of sliding surfaces (first sliding surfaces) of the plate-shaped portion 110 of the forward slide guide 10 facing the inside of the radial direction of the multi-core writing instrument 1 faces the multi-core writing instrument 1. In the radial direction, the front guide 22e3 is guided by a pair of guide planes formed on or near the front guide 22e3. The forward movement of the slide guide 10 can be restricted within a predetermined operation range by the abutment of the restricting inclined surfaces 11 a 1, 12 a 1 of the slide guide 10 and the slide guide restricting protrusion 22 a 11 of the slide guide hole 22 a.

When the protruding state of the writing body 30 is canceled to be submerged, as shown in FIG. 7A, the other slide guide 10 is moved forward in the protruding state of one of the selected writing bodies 30. When the other slide guide 10 is moved forward, the release protrusion 140 of the other slide guide 10 comes into contact with the released protrusion 160 of the slide guide 10 in the protruding state. Thereby, the slide guide 10 in the protruding state is pushed outward in the radial direction, and the engagement of the rear end of the plate-shaped portion 110 of the slide guide 10 with the pair of guide locking section portions 22f of the slide guide hole 22a is released. When the slide guide 10 is released Engagement with the slide guide hole 22 a causes the writing body 30 which is elastically pressed to the rear by the elastic force of the compression spring 42 to sink into the shaft tube 2. If the other slide guide 10 is further advanced, the other writing body 30 held by the other slide guide 10 will protrude from the opening portion 21 a 1 of the front port 21 a of the shaft tube 2. Alternatively, if the operation of the other slide guides 10 is suspended, the other slide guides 10 will also retreat, and all the slide guides 10 will be submerged into the shaft tube 2.

The combination of the multi-core writing instrument 1 will be described. First, the guide restricting portion 40 is fixed to the rear shaft 22, and the front shaft 21 in which the grip portion 3 is assembled (in other embodiments, the front shaft 21 and the grip portion 3 may be integrally formed by two-color molding or the like). ) Is screwed with the rear axle 22 to assemble. Thereafter, as shown in FIG. 8, the slide guide 10 in which the writing body 30 and the compression spring 42 are assembled is inserted into the slide guide hole 22 a from the front end of the writing body 30 to assemble the slide guide 10 in the slide guide hole 22 a.

The slide guide 10 can be easily assembled by pressing the detachable projection 150 of the slide guide 10 against the rear guide 22e2 of the guide portion 22e of the slide guide hole 22a. As shown in FIG. 9A with an example of assembling the slide guide 11 with a clip, if the projection 150 for attachment and detachment is brought into contact with the rear guide 22e2, the slide guide 10 is pressed into the slide guide hole 22a, The inclined surface 221 of the engaging projection 220 of each of the detachable pieces 200 of the protrusion 150 abuts on the rear guide inclined surface 22e21 of the rear guide 22e2. If the slide guide 10 is further pressed into the slide guide hole 22a, as shown in FIG. 9B, the engaging protrusion 220 of the slide guide 10 will be elastically deformed (specifically, the radial extension 210 supporting the engaging protrusion 220 will be deformed). Elastic deformation), so that the opposing detachable pieces 200 approach each other. If the slide guide 10 is further pressed into the slide guide hole 22a, the removal protrusion 150 (engagement protrusion 220) will pass through between the pair of opposing rear guides 22e2, and the elastic deformation of the removal sheet 200 will be released. To return to its original state. In this way, by pressing the slide guide 10 into the slide guide hole 22a, as shown in FIG. 6A, the slide guide 10 can be easily assembled in the slide guide hole 22a, and can be slid freely in the axial direction and Limit movement in the radial direction. The radial extension 210 of the removal protrusion 150 of the slide guide 10 can promote good elastic deformation of the removal protrusion 150 in the circumferential direction (a direction substantially the same as the direction orthogonal to the press-fitting direction).

The slide guide 10 can also be removed through the assembled slide guide hole 22a. When the slide guide 10 is to be removed from the slide guide hole 22a, the slide guide 10 with the writing body 30 to be detached is first advanced, and the removal protrusion 150 is moved to a position abutting on the front guide 22e3. At the position where the detachable projection 150 abuts on the front guide 22e3, pull the slide guide 10 outward in the radial direction. As shown in FIG. 10A, the edge of the radial outer surface of the engaging projection 220 will be in contact with the front guide 22e3 The front guide inclined surface 22e31 abuts. When the sliding guide 10 is further pulled outward in the radial direction, the engaging protrusions 220 are elastically deformed (specifically, the radial extending portions 210 supporting the engaging protrusions 220 are elastically deformed), and the detachable pieces 200 are brought closer to each other. If the sliding guide 10 is further pulled outward in the radial direction, as shown in FIG. 10B, the removal protrusion 150 will pass between the pair of opposed front guides 22 e 3. In this way, the slide guide 10 can be easily removed from the slide guide hole 22a.

As described above, in the present embodiment, the inclined surface 221 is formed on the engagement protrusion 220 of the slide guide 10. Therefore, the engaging protrusions 220 of the slide guide 10 can be easily deformed elastically, and the slide guide 10 can be assembled into the slide guide hole 22a satisfactorily. Further, an inclined surface (a rear guide inclined surface 22e21 of a rear guide 22e2 of the guide portion 22e or a front guide inclined surface 22e31 of a front guide 22e3) is formed in the slide guide hole 22a in a circumferential direction. Therefore, the engaging protrusion 220 of the slide guide 10 can be easily deformed elastically to detach the slide guide 10 from the slide guide hole 22a.

In the present embodiment, the position at which the slide guide 10 is detached is different from the position at which the slide guide 10 is assembled, and is a position on the front side in the slide guide hole 22a (the position where the front guide 22e3 is disposed). With such a configuration, particularly with the pen holder slide guide 11, the pen holder 11a When being carried in a chest pocket or the like, it is possible to prevent the slide guide with pen holder 11 from falling out of the slide guide hole 22a due to the slide guide 10 being accidentally advanced. On the other hand, when the slide guide 10 of the present embodiment is in the protruding state of the writing body 30 located at the forefront, the body portions 11b and 12b of the slide guide 10 are exposed in the slide guide hole 22a, and the elastically deformable slide The distance from the front edge 22a1 of the guide hole 22a to the pen holder 11a or the operation portion 12a is short. Therefore, the body portions 11b and 12b of the slide guide 10 are not deformed outward in the radial direction and the slide guide 10 is detached. As described above, the multi-core writing instrument 1 of the present embodiment is configured to easily assemble the writing body 30 and the slide guide 10 into the slide guide hole 22a, and if the slide guide 10 is not consciously intended to be disassembled, the slide guide 10 Will be difficult to fall off.

As described above, the present invention is not limited to this embodiment, and can be implemented in various forms. For example, in this embodiment, the radial extension 210 is formed in the detachable projection 150 of the slide guide 10, but the present invention is not limited to this. In other embodiments, only the engaging projection 220 may be provided. The detachable projection 150 allows the engaging projection 220 to be elastically deformed in the circumferential direction. Moreover, in this embodiment, although the engaging protrusion 220 configured as the detachable protrusion 150 can be elastically deformed in the circumferential direction, it is not limited to this. In other embodiments, the beam-shaped portion 22d can be elastically deformed. The slide guide hole 22a can be expanded in the circumferential direction. Alternatively, in other embodiments, both the detachable projection 150 of the slide guide 10 and the beam-like portion 22d may be elastically deformed in the circumferential direction. With this configuration, since the amount of elastic deformation of both the detachable projection 150 and the beam-shaped portion 22d of the slide guide 10 can be suppressed, even if the slide guide 10 is repeatedly attached to and detached from the slide guide hole 22a, it can be suppressed. The strength of the removable structure due to repeated material fatigue decreases.

Claims (4)

A writing instrument includes: a shaft tube having a plurality of sliding guide holes opened in a radial direction; a plurality of sliding guides respectively assembled in the plurality of sliding guide holes and slidable in an axial direction; and a plurality of writing bodies, respectively Each of the plurality of sliding guides is assembled on the sliding guide; the pen can select one of the plurality of writing bodies to protrude from the front mouth of the shaft tube, and is characterized in that the sliding guide has a circumferential direction When the sliding guide is to be assembled in the sliding guide hole, the engaging protrusion of the sliding guide or the sliding guide hole can be elastically deformed in the circumferential direction. The writing instrument according to claim 1, wherein the engaging protrusion of the slide guide further has a radial direction extending portion extending in the radial direction. The writing instrument according to claim 1 or 2, wherein the engaging protrusion of the sliding guide or the sliding guide hole further has an inclined surface inclined in the circumferential direction. If the writing implement of any one of claims 1 to 3, wherein one of the aforementioned plurality of slide guides further has a pen holder, the slide guide having the pen holder further has the ability to communicate with the aforementioned shaft when the slide guide is retracted. The engaging portion of the tube engagement.