CN111108004A

CN111108004A - writing utensils

Info

Publication number: CN111108004A
Application number: CN201880050099.2A
Authority: CN
Inventors: 铃木智昭
Original assignee: Kotobuki and Co Ltd
Current assignee: Kotobuki and Co Ltd
Priority date: 2017-08-01
Filing date: 2018-08-01
Publication date: 2020-05-05
Also published as: JP7100643B2; WO2019026935A1; JPWO2019026935A1

Abstract

The invention provides a writing instrument, which is provided with a plurality of writing bodies, wherein a writing core can be supplied from the head end of one writing body. The writing instrument according to one embodiment includes a plurality of writing bodies, and is capable of selecting one of the plurality of writing bodies to project the one writing body from the pen tip, wherein a holder is provided that holds the one writing body such that a rear end opening of the one writing body of the plurality of writing bodies is arranged on an axis.

Description

Writing implement

Technical Field

The present invention relates to a writing instrument capable of selectively using a plurality of writing bodies.

Background

Conventionally, there has been known a writing instrument in which a plurality of writing shafts are housed in a barrel, and a front end of one writing shaft can be selectively projected from a front end opening of the barrel from among the plurality of writing shafts, wherein the barrel includes a front barrel and a rear barrel relatively rotatable with respect to the front barrel, an outer diameter of the barrel is 10.5mm or less, a cam main body non-rotatable with respect to the rear barrel and a slider non-rotatable with respect to the front barrel and coupled to a rear end portion of each writing shaft are provided in the barrel, a V-shaped cam protrusion projecting forward is formed on the cam main body, a forward facing cam surface is formed along the cam protrusion, a locking portion is formed at an apex portion of the cam protrusion of the cam surface, a V-shaped cam projecting rearward is formed on the slider, a rearward facing sliding contact surface is formed along the cam, and the sliding contact surface is pressed by the cam surface, by the relative rotation between the rear and front barrels, the sliding contact surface of the cam is brought into sliding contact with the cam surface, and one cam is locked to the locking portion, whereby the tip of the writing shaft connected to the slider provided with the cam is selectively projected from the tip opening of the barrel (see, for example, patent document 1). According to this writing instrument, the outer diameter of the shaft tube is small, and a writing instrument having good appearance and good operability can be provided without exposing a plurality of push levers as in the conventional art and without requiring a return button or the like.

Further, writing instruments are known which include: a shaft cylinder; a plurality of writing bodies which are provided in the shaft tube so as to be capable of moving forward and backward and which include a writing body having a core housing section; a slide member that constitutes a part of the writing body and moves the core accommodating section forward or backward by sliding one end in a forward or backward direction, and the core accommodating section is inserted into the other end that is a non-operation side end; and a pen tip provided at the tip of the shaft tube eccentrically from the shaft center of the shaft tube toward the cartridge accommodating portion in the shaft radial direction so that the tip of the writing body protrudes (see, for example, patent documents 2 and 3). According to these writing instruments, a full-length composite writing instrument can be provided by inserting the core housing portion into the slide member and accommodating a part of the core.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2005-161829 (see, for example, paragraphs 0008 and 0014.)

Patent document 2: re-published patent application WO2010/024346 (see, for example, paragraphs 0008 and 0012.)

Patent document 3: japanese patent laid-open publication No. 2011-073388 (see, for example, FIG. 1)

Disclosure of Invention

Problems to be solved by the invention

However, in the past, in a writing instrument which includes a plurality of writing bodies and can select one of the plurality of writing bodies to project from a pen tip, it has been required to provide a writing instrument which can supply a writing core from a rear end of the one writing body.

The invention aims to provide a writing instrument which is provided with a plurality of writing bodies and can supply a writing core from the rear end of one writing body.

Means for solving the problems

In one aspect of the writing instrument according to the present invention, the writing instrument includes a plurality of writing bodies, and one of the plurality of writing bodies is selectable to protrude from the pen tip, and includes a holder configured to hold the one writing body such that a rear end opening of the one of the plurality of writing bodies is disposed on an axis.

Effects of the invention

In a plurality of aspects of the present invention, a writing instrument including a plurality of writing bodies, in which a writing core can be supplied from a rear end of one writing body, can be provided.

Drawings

Fig. 1 is a plan view showing an appearance of a writing instrument according to an embodiment of the present invention.

Fig. 2 is a sectional view II-II of fig. 1 of the writing instrument according to the embodiment of the present invention.

Fig. 3 is a front view of a holder for a writing instrument according to an embodiment of the present invention.

Fig. 4 is a view showing the holder of the writing instrument according to the embodiment of the present invention as viewed from the front.

Fig. 5 shows a holder for a writing instrument according to an embodiment of the present invention, and is a V-V sectional view of fig. 4.

Fig. 6 is a front view schematically showing a state where a writing body of the writing instrument according to the embodiment of the present invention protrudes from a writing tip, and is a partial sectional view mainly showing a mechanical pencil lead, a holder, and a guide member.

Fig. 7 is a schematic sectional view of VII-VII in fig. 6, showing a writing instrument according to an embodiment of the present invention.

Fig. 8 is a front view, partially in section, schematically showing a state in which a writing implement of the writing instrument according to the embodiment of the present invention is inserted into a writing tip, and is a view mainly showing a mechanical pencil lead, a holder, and a guide member.

Fig. 9 is a schematic cross-sectional view IX-IX of fig. 2 of a writing utensil of an embodiment of the present invention.

Fig. 10 is a front view, partially in section, schematically showing a state where a writing implement projects from a writing tip, and is a modification of the writing implement according to the embodiment of the present invention, and mainly shows a mechanical pencil lead, a holder, and a guide member.

Detailed Description

Hereinafter, a plurality of embodiments of the present invention will be described based on the drawings. Fig. 1 is a plan view showing an appearance of a writing instrument 1 according to an embodiment of the present invention. The writing instrument 1 includes: a shaft tube 2 including a front shaft 20 and a rear shaft 30; and a clip 6 mounted to the rear shaft 30 of the barrel 2. In the following description, the front shaft 20 side is set as the front of the writing instrument 1 and the opposite rear shaft 30 side is set as the rear in the direction of the axis L in the longitudinal direction of the writing instrument 1.

The writing instrument 1 includes one mechanical pencil lead 3 and two ballpoint pen leads 4 (see fig. 2) as a plurality of writing bodies, and by relatively rotating the front shaft 20 and the rear shaft 30, one writing body can be sequentially projected from the tip opening 25 of the writing tip, which is a tapered portion of the front shaft 20, and a desired writing body can be selected and used.

As shown in fig. 2, the front shaft 20 is formed in a substantially cylindrical shape. The tip of the front shaft 20 is tapered, and a tip opening 25 is formed at the tip of the tip. A cylindrical fitting cylinder 21 is detachably inserted into the rear end opening of the front shaft 20. The insertion of the fitting cylinder 21 into the front shaft 20 is restricted by an abutment flange 21a formed annularly on the outer periphery of the central portion of the fitting cylinder 21 abutting against the rear end of the front shaft 20. A retainer tube portion 51a formed in a substantially tubular shape at the front portion of a guide member 51 described later is press-fitted and fixed into the rear end opening of the fitting tube 21. A guide portion 51b for guiding sliding of

sliders

55 and 56, which will be described later, is formed at the rear portion of the guide member 51. The guide portion 51b is formed in a substantially cylindrical shape, and has three slide guides 51b1, 51b2, and 51b3 formed on the outer peripheral surface thereof as grooves extending in the axial direction. A slider 55 is slidably fitted to the slide guide 51b1, and the slider 55 is used to attach a holder 52 for holding the mechanical pencil lead 3. A slider 56 is slidably assembled to the slide guides 51b2 and 51b3, and the slider 56 is used to attach a holder 53 for holding the ballpoint pen refill 4.

As will be described later in detail, the rear end of the core tube 3a of the mechanical pencil lead 3 is pressed into the front end opening of the holder 52 holding the mechanical pencil lead 3. On the other hand, the holder 53 holding the ballpoint pen refill 4 is formed into a substantially rod shape, and a cylindrical joint 58 is fixed to a distal end portion thereof. The rear end of the ink tube of the ballpoint pen refill 4 is detachably pressed into the front end opening of the joint 58.

Cam followers

55a and 56a that engage with a cam surface 54a of a rotary cam 54 described later are formed on the outer peripheral surfaces of the

sliders

55 and 56 on the outer sides in the radial direction. Pressing springs 57 as compression coil springs are disposed between the rear surface of the retainer cylinder portion 51a of the guide member 51 and the

sliders

55 and 56, respectively. The

sliders

55 and 56 are constantly biased rearward by a pressing spring 57 and pressed against a cam surface 54a of the rotating cam 54 described later. Therefore, by the rotation of the rotating cam 54, the

cam followers

55a, 56a of the

sliders

55, 56 move in the axial direction following the cam surface 54a of the rotating cam 54, respectively. The mechanical pencil lead 3 and the ballpoint pen lead 4 attached to the

sliders

55 and 56 are guided to move forward and backward by the slide guides 51b1, 51b2, and 51b3 of the guide member 51 in a state of being constantly biased rearward by the pressing spring 57, and are selectively moved forward and backward by the cam mechanism 50 as a writing body advancing and retracting mechanism as will be described later in detail.

The rotating cam 54 is formed in a cylindrical shape obtained by obliquely cutting the tip of a cylindrical member, and the inclined tip portion is disposed forward as a cam surface 54 a. Accordingly, the rotating cam 54 is formed in a substantially V shape in plan view. A notch, not shown, is formed at the tip of the rotary cam 54 and can be engaged with the top of the

cam followers

55a, 56a formed in a substantially pentagonal shape of the

sliders

55, 56. A guide member rotation support shaft 51c is formed at the rear end of the guide portion 51b of the guide member 51. The guide member rotation support shaft 51c has a shaft portion 51c1 and a retaining flange portion 51c2 formed in an umbrella shape at the rear end of the shaft portion 51c 1. An annular rib 54b projecting in an annular shape is formed on the inner peripheral surface of the rotating cam 54. The guide member rotation support shaft 51c is rotatably assembled to the annular rib 54b of the rotation cam 54. The rotating cam 54 is rotatable with respect to the guide member 51 in the circumferential direction around the axis L. The front surface of the flange portion 51c2 of the guide member rotation support shaft 51c abuts the rear surface of the annular rib 54b of the rotation cam 54, whereby the forward movement of the guide member 51 with respect to the rotation cam 54 is regulated.

A caulking portion 30a protruding toward the inner peripheral surface of the rear shaft 30 is formed near the rear end of the rear shaft 30. When the caulking portion 30a of the rear shaft 30 is engaged with the outer peripheral surface of the rotating cam 54, the rotating cam 54 is fixed to the rear shaft 30. A front portion of the substantially cylindrical erasing tool holder 31 is screwed to a rear end portion of the substantially cylindrical rotating cam 54 so as to penetrate through the base portion 6a of the annularly formed pen clip 6. A rubber as an erasing tool 32 is detachably inserted into a rear portion of the erasing tool holder 31. An external thread part is formed on the outer periphery of the rear part of the erasing tool holder 31, and a rear axle cap 33 is screwed. An O-ring 34 is disposed between the rear shaft cap 33 and the rear portion of the eraser holder 31, and prevents the screw connection between the rear shaft cap 33 and the eraser holder 31 from loosening.

The front end of the rear shaft 30 is press-fitted into the rear end opening of the cylindrical trim ring 35. The gap formed between the front end of the rear axle 30 and the rear end of the front axle 20 is covered by the trim ring 35. Further, a stroke for feeding the writing lead of the mechanical pencil lead 3 can be ensured by a gap formed between the front end of the rear shaft 30 and the rear end of the front shaft 20.

The cam mechanism 50 includes a guide member 51, a holder 52 for the mechanical pencil lead 3, a holder 53 for the ballpoint pen lead 4, a rotary cam 54,

sliders

55 and 56, a pressing spring 57, and a joint 58. The rear shaft 30, the rotating cam 54, the erasing tool holder 31, and the rear shaft cover 33 are rotatable in the circumferential direction as a unit with respect to the guide member 51 and the fitting cylinder 21. The cam mechanism 50 can press the

sliders

55, 56, which are connected to one of the selected plurality of writing bodies, so as to project forward.

The mechanical pencil lead 3 can have any known structure. The mechanical pencil lead 3 includes a cylindrical core tube 3a having a rear end mounted on the holder 52. A writing core feed mechanism 40 is attached to the front end portion of the core tube 3 a. Specifically, the rear portion of the collet coupler 41 is detachably press-fitted into the distal end opening of the core tube 3 a. A collet 42 is press-fitted and fixed to a front portion of the collet joint 41. An intermediate tube member 43 is disposed on the outer peripheries of the collet joint 41 and the collet 42 so as to be movable forward and backward relative to the collet joint 41. A collet ring 44 is disposed on the outer periphery of the large diameter portion of the collet 42 in front of the middle tube member 43. The forward movement of the collet ring 44 is restricted by the large diameter portion of the collet 42. A collet spring 45 is disposed on the outer periphery of the collet 42 between an annular step portion formed on the inner peripheral surface of the middle tubular member 43 and the tip of the collet joint 41. The middle tube member 43 and the clip ring 44 are biased forward by the clip spring 45. The rearward movement of the middle tube member 43 beyond a predetermined amount is restricted by the annular protrusion 41a formed on the outer periphery of the collet joint 41. A tip metal (tip portion) 46 having an annular step portion formed on the outer periphery is screwed to the front portion of the middle tubular member 43. A core breaker 47 for gripping the writing core W is incorporated in the tip end side of the tip metal 46.

In the mechanical pencil lead 3 configured as described above, when the rear end of the rear shaft 30 is pushed in a state where the cam follower 55a of the slider 55 engages with the front end of the cam surface 54a of the rotary cam 54, the outer peripheral step portion of the tip metal fitting 46 abuts against the inner edge of the front end opening 25 of the front shaft 20, the cartridge 42 and the cartridge ring 44 are disengaged from each other, the writing lead feeding mechanism 40 is operated, and the writing lead W is fed forward. The ballpoint pen refill 4 includes a known ballpoint pen tip 4a and an ink tube 4b, and a detailed description thereof will be omitted.

Next, the holder 52 will be described in detail with reference to fig. 3 to 5. The holder 52 includes a holder main body 521 formed in a columnar shape and an axially extending portion 522 formed in a substantially cylindrical shape. The holder main body 521 has a longitudinal central axis LH radially offset from the axis L by a predetermined amount. The on-axis extending portion 522 of the holder 52 extends on the axis L of the writing instrument 1. The retainer 52 has a radial extension between the central axis LH of the retainer body 521 and the axis L that extends radially by a predetermined amount. The inner peripheral surface of the axially extending portion 522 is configured such that the inner periphery of the rear portion is smaller than the inner periphery of the front portion. With this configuration, the mechanical pencil lead 3 can be assembled to the holder main body 521 so as to have a predetermined elasticity in the radial direction. Further, if the holder 52 itself has a predetermined elasticity in the radial direction, it is preferable that the other writing bodies push the tip of the mechanical pencil lead 3 out of the axis L when the plurality of writing bodies interfere with each other and operate on the axis L as described later in detail. Further, in order to facilitate the press-fitting of the mechanical pencil lead 3, a plurality of lead-in portions (lead-in slopes) 522a are formed at the boundary portion where the inner periphery of the axially extending portion 522 is reduced in diameter. The rear end of the core tube 3a of the mechanical pencil lead 3 is detachably press-fitted into the inner periphery of the axially extending portion 522. The axially extending portion 522 is assembled to the core tube 3a so as to cover the outer periphery of the core tube 3a, and therefore, the capacity in the core tube 3a can be sufficiently ensured. A cylindrical slider mounting shaft 553 is formed at the rear end of the holder body 521. The outer peripheral surface of the slider attachment shaft 553 of the holder 52 is detachably pressed into the front end opening of the slider 55.

As shown in fig. 2, the mechanical pencil lead 3 held by the axially extending portion 522 of the holder 52 is offset radially inward from the axis LH of the holder body 521 by a distance from the axis LH to the axis L, and extends on the axis L of the writing instrument 1. As shown in fig. 7, the holder main body 521 to which the holder 52 of the mechanical pencil lead 3 is assembled and the holder 53 to which the two ballpoint pen leads 4 are assembled are arranged to be shifted radially outward from the axis L. In this state, the holder main body 521 of the holder 52 couples the mechanical pencil lead 3 and the slider 55, and the holder 53 couples the ballpoint pen lead 4 and the slider 56. The

sliders

55 and 56 are guided by slide guides 51b1, 51b2, and 51b3 arranged at equal intervals in the circumferential direction, offset from the center axis in the radial direction in the guide portion 51 b. As shown in fig. 9, the mechanical pencil lead 3 (writing lead feeding mechanism 40, core tube 3a) is disposed so as to be displaced radially inward from the axis line LH and extend substantially and constantly on the axis line L even if only the tip end thereof is pushed out from the axis line L by the ballpoint pen lead 4 as described later in detail.

In this way, the mechanical pencil lead 3 is arranged to extend substantially all the way along the axis L and to project along the axis L. Therefore, as compared with the case where the writing core W is disposed obliquely with respect to the axis L at the time of projection as in the conventional art, it is possible to reduce the problem that the writing core W breaks at the tip of the writing core feeding mechanism 40 or the like. In the present embodiment, the writing core W containing graphite as a coloring material is used, and in another embodiment, a colored writing core having relatively low strength is used, and the writing core is more preferably protruded along the axis L.

As described above, the holder 52 is configured to hold the mechanical pencil lead 3 (writing lead feeding mechanism 40) with a predetermined elasticity in the radial direction. In this way, it is preferable that the ballpoint pen refill 4 is configured to be able to push out at least the tip of the retracted automatic pen refill 3 from the axis L when any other ballpoint pen refill 4 than the automatic pen refill 3 is selected by the cam mechanism 50 and protrudes forward. With this configuration, the one writing body is arranged to extend substantially all the way on the axis, and the projecting stroke of the plurality of writing bodies is configured to be relatively short, so that the selected one writing body can be smoothly projected from the pen tip even when the plurality of writing bodies interfere with each other.

Further, as shown in fig. 6 and 8, the guide member 51 is preferably formed with a writing core supply passage 51d which is a hole penetrating in the front-rear direction on the axis L and which can supply the writing core W from behind. The writing lead supply path 51d, the axially extending portion 522 of the holder 52, and the mechanical pencil lead 3 are disposed coaxially with the axis L. Further, the mechanical pencil lead 3 has a rear end opening capable of feeding the writing lead W from behind. With this configuration, the rear end opening of the mechanical pencil lead 3 can be always arranged on the axis L. In this case, for example, even when the ballpoint pen refill 4 is caused to protrude from the pen tip, the writing core feed mechanism 40 and the writing core supply path 51d can be always communicated with each other. Therefore, the writing lead W can be always supplied from the rear of the writing instrument 1 to the mechanical pencil lead 3. In the present embodiment, when the rear axle cap 33 and the erasing tool holder 31 are removed, the additional writing core W can be supplied to the core tube 3a through the writing core supply path 51d at all times regardless of the protruding state of the writing body. When the rear end opening of the mechanical pencil lead 3 is disposed on the axis L of the writing instrument 1, the writing lead W can be easily supplied from the rear of the writing instrument 1. In another embodiment, when the writing lead is fed from the rear of the writing instrument, the rear end opening of the mechanical pencil lead, which is disposed offset in the radial direction from the axis L, may be temporarily disposed on the axis L.

Further, as shown in fig. 8, in the state where the mechanical pencil lead 3 is most retracted, the rear end opening of the axially extending portion 522 of the holder 52 is close to or brought into contact with the front surface of the bottom portion of the holder cylindrical portion 51a of the guide member 51, so that the additional writing lead W can be supplemented optimally.

In another embodiment, as in the modification shown in fig. 10, the axially extending portion 522-1 of the holder 52 may be inserted into the core tube 3a of the mechanical pencil lead 3. In this case, the mechanical pencil lead 3 can be held on the axis L so as to have further elasticity in any different radial direction.

As described above, the present invention is not limited to the embodiment, and can be implemented in various forms. For example, although the present embodiment is a writing instrument 1 in which one writing body is selected by relatively rotating the front shaft 20 and the rear shaft 30 by the cam mechanism 50 as the writing body advancing and retracting mechanism, the present invention is not limited to this, and a writing instrument including a slide-type writing body advancing and retracting mechanism including a plurality of sliders that connect the respective writing bodies via a holder, wherein at least a part of each slider protrudes radially outward from the shaft tube, and wherein one slider is manually protruded forward to perform a slide operation, whereby one writing body can be selected and protruded from the pen tip.

Description of the symbols

1-writing instrument, 2-barrel, 3-mechanical pencil lead, 3 a-core tube, 4-ballpoint pen lead, 4 a-ballpoint pen tip, 4 b-ink tube, 6-clip, 6 a-base, 20-front shaft, 21-fitting barrel, 21 a-abutment flange, 25-front end opening, 30-rear shaft, 30 a-clinching portion, 31-erasing instrument holder, 32-erasing instrument, 33-rear shaft cap, 34-O-ring, 35-decorative ring, 40-writing core feed-out mechanism, 41-cartridge joint, 41 a-annular protrusion, 42-cartridge, 43-middle barrel part, 44-cartridge ring, 45-cartridge spring, 46-tip metal piece, 47-core-interrupter, 50-cam mechanism, 51-guide member, 51 a-retaining barrel portion, 51 b-guide portion, 51b 1-slide guide, 51b 2-slide guide, 51b 3-slide guide, 51 c-guide member rotation support shaft, 51c 1-shaft portion, 51c 2-flange portion, 51 d-writing core supply path, 52-holder, 53-holder, 54-rotary cam, 54 a-cam surface, 54 b-annular rib, 55-slider, 55 a-cam follower, 56-slider, 56 a-cam follower, 57-pressing spring, 58-joint, 521-holder body, 522-axially extending portion, 522-1-axially extending portion, 522 a-introducing portion, 553-slider mounting shaft, L, LH-axis, W-writing core.

Claims

1. A writing instrument comprising a plurality of writing bodies, and one writing body of the plurality of writing bodies can be selected so that the one writing body protrudes from a pen head, characterized in that:

A holder is provided which holds the one writing body of the plurality of writing bodies so that the rear end opening of the writing body is arranged on the axis.

2. The writing implement according to claim 1, characterized in that,

The rear end opening of one writing body of the plurality of writing bodies is always arranged on the axis.

3. The writing implement according to claim 1 or 2, characterized in that,

It further includes a writing lead supply path which communicates with the rear end opening of one of the plurality of writing bodies from the rear, and which can supply the writing lead from the rear.

4. The writing implement according to any one of claims 1 to 3, wherein

The above-mentioned holder has a radially extending portion extending in the radial direction.

5. The writing implement according to any one of claims 1 to 4, wherein

The holding member holds the one writing body in such a manner that when the other writing bodies are selected, the selected other writing body has a predetermined elasticity capable of pushing out at least the front end of the one writing body from the axis .