WO2018216798A1

WO2018216798A1 - Writing tool

Info

Publication number: WO2018216798A1
Application number: PCT/JP2018/020135
Authority: WO
Inventors: 鈴木　智昭; 利彦堀江; 良二神山
Original assignee: 株式会社壽
Priority date: 2017-05-25
Filing date: 2018-05-25
Publication date: 2018-11-29
Also published as: TW201900439A; JP2020142369A

Abstract

[Problem] To provide a writing tool capable of reducing a shock applied from an outside to a refill over conventional art. [Solution] A writing tool according to an embodiment is provided with: a shaft cylinder; a refill accommodatable in the shaft cylinder; a support member assembled between the shaft cylinder and the refill; and a return spring that is arranged on a rear side of the support member and urges the refill toward the rear side. The support member is assembled at a prescribed position in a back-and-forth direction at which the refill is prevented from colliding against an inner peripheral surface or a tip opening of the shaft cylinder when a front part of the refill cantilevered by the support member is vibrated by a prescribed external force.

Description

Writing instrument

The present invention relates to a writing instrument that can send out a writing core by a knocking operation.

Conventionally, a shaft cylinder having an axial slot in the rear peripheral wall, a refill having a writing part at the front end and inserted from the rear end into the shaft cylinder, and a biasing member for biasing the refill rearward, Inserted into the rear part of the shaft cylinder, the front end abuts the rear end of the refill, and the rear part projects from the rear end of the shaft cylinder, and is connected to the front end of the knock member and extends rearward. An elastic piece that is elastically deformable in the radial direction of the shaft cylinder, a locking projection formed at the rear end of the elastic piece, and a clip leg that is connected to the elastic piece and is slidably fitted into the elongated hole And a clip that presses or closes the front part to the outer periphery of the shaft cylinder, and an intermediate slit at the rear end of the long hole in the direction of the rear end extension of the long hole in the rear peripheral wall of the shaft cylinder And a rear slit connected to the rear end of the locking hole and reaching the rear end of the shaft cylinder. In the knock type writing instrument formed continuously, at the rear end portion of the clip leg piece, the intermediate slit and the clip are pushed out in the rear end direction with a pressing force stronger than the urging force of the urging member. There is known a knock type writing instrument in which a rear edge ridge line portion is formed to sequentially expand the rear slit in the width direction (see, for example, Patent Document 1). According to this writing instrument, the refill can be exchanged easily and neatly.

Republished Patent No. 2010-010825 (see, for example, paragraphs 0010 and 0015)

In the conventional writing instrument disclosed in Patent Document 1, the refill can be accommodated in the shaft tube to protect the chip when not in use. However, even if the refill is accommodated in the shaft cylinder, when a strong impact is applied to the writing instrument from the outside, it is assumed that the refill collides with the inner surface of the shaft cylinder and causes problems such as chip damage. . Therefore, it has been demanded to provide a writing instrument that can reduce the impact applied from the outside to the refill accommodated in the shaft cylinder as compared with the prior art.

An object of the present invention is to provide a writing instrument capable of reducing the impact on the refill applied from the outside as compared with the conventional case.

In one aspect of the writing instrument according to the present invention, the writing instrument includes a shaft tube, a refill that can be accommodated in the shaft tube, a support member that is assembled between the shaft tube and the refill, and a rear side of the support member. And a return spring that urges the refill rearward, and the support member is configured to vibrate when a front portion of the refill that is cantilevered by the support member vibrates by a predetermined external force. The front portion of the refill is assembled at a predetermined position in the front-rear direction so as not to collide with the inner peripheral surface or the tip opening of the shaft tube.

According to one aspect of the present invention, it is possible to provide a writing instrument that can reduce the impact on the refill applied from the outside as compared with the conventional case.

It is a longitudinal cross-sectional view of the writing instrument which concerns on 1st Embodiment of this invention. It is a perspective view of a support member concerning a 1st embodiment of the present invention. It is a longitudinal cross-sectional view of the writing instrument which concerns on 2nd Embodiment of this invention.

(First embodiment)
The first embodiment of the present invention will be described below with reference to FIGS. The writing instrument 1 according to the present embodiment is a knock-type ballpoint pen capable of appearing and retracting the refill 3 accommodated therein from the front end opening 21a of the front end portion 21 by a knocking operation on the knock button 9. In the following description, the side on which the front end portion 21 of the writing instrument 1 is disposed will be described as the front in the longitudinal direction of the writing instrument 1 (hereinafter referred to as the axial direction as appropriate), and the side on which the knock button 9 is disposed will be described as the rear. .

As shown in FIG. 1, the writing instrument 1 includes a shaft cylinder 2 having a substantially cylindrical shape as a whole. A substantially conical tip 21 is formed at the front end of the shaft tube 2. The front opening 21 has a front end opening 21a at the front end. A clip 22 is attached to the rear end side of the outer peripheral surface 2 b of the shaft tube 2. The clip 22 is fixed to the rear end portion of the shaft tube 2 by sandwiching an annular fixing portion 22 a of the clip 22 in the front-rear direction by the shaft tube 2 and the tail cap 6. A refill 3, a refill connection portion 7, and a rotating cam 8 are accommodated in the shaft cylinder 2. Further, a part of the front of the tail crown 6 and the knock button 9 is accommodated on the rear end side in the shaft tube 2.

The tail cap 6 is formed in a substantially cylindrical shape. A rear cylinder portion 61 having an outer diameter substantially the same as the outer peripheral surface 2 b of the shaft cylinder 2 is formed on the rear side of the tail crown 6. A front tube portion 62 having an outer diameter smaller than that of the rear tube portion 61 is formed on the front side of the tail crown 6. A male screw is formed on the outer peripheral surface of the front cylinder portion 62. The male screw is screwed with a female screw formed on the inner peripheral surface of the rear end of the shaft tube 2, and the tail crown 6 is fixed to the rear end of the shaft tube 2. A fixed cam portion 62 a having a plurality of guide grooves 62 b extending in the axial direction is formed on the inner peripheral surface of the front cylindrical portion 62. The guide groove 62b is engaged with a slide projection 82a of the rotating cam 8 and a slide projection 91a of the knock button 9 which will be described later, and a locking surface 62a1 for locking the slide projection 91a of the knock button 9 is formed at the rear end. A chamber is formed in the front portion of the front cylinder portion 62 so as to accommodate an intermediate diameter portion 82 of the rotating cam 8 described later so as to be movable in the axial direction and rotatable in the circumferential direction. A locking projection for locking the middle diameter portion 82 of the rotary cam 8 in the axial direction is formed on the front end portion of the front cylindrical portion 62 so as to protrude radially inward, and the fixed cam portion 62a constituting the rear wall of the chamber is formed. An annular substantially saw-blade fixed cam surface 63 is formed on the front surface to engage a rotating cam surface 84 of the rotating cam 8 described later.

Rotating cam 8 is formed in a substantially cylindrical shape. The rotating cam 8 has a small diameter portion 81, a medium diameter portion 82, and a large diameter portion 83 from the rear in the axial direction toward the front. The medium diameter portion 82 is formed with a larger outer diameter and inner diameter than the small diameter portion 81, and the large diameter portion 83 is formed with a larger inner diameter than the medium diameter portion 82. A plurality of slide protrusions 82 a that engage with the guide grooves 62 b of the fixed cam portion 62 a are formed on the outer peripheral surface of the medium diameter portion 82. At the rear end of the middle diameter portion 82, an annular substantially saw-blade rotating cam surface 84 that engages with the fixed cam surface 63 of the fixed cam portion 62a is formed. At the front end of the large-diameter portion 83, a flange 85 projecting in an annular shape toward the radially outer side is formed.

The knock button 9 is formed in a substantially cylindrical shape having an opening on the front end side and a bottom on the rear end side. Inside the knock button 9, a small-diameter portion 81 of the rotary cam 8 is assembled so as to be able to rotate and move back and forth. A front cylinder 91 having an outer diameter smaller than that of the rear part thereof is formed at the front part of the knock button 9, and is engaged with the front end of the outer peripheral surface of the front cylinder 91 so as to be movable back and forth in the fixed cam part 62 a. A slide protrusion 91a is formed to protrude radially outward. When the knock button 9 is retracted, the rear end surface of the slide protrusion 91a of the knock button 9 abuts on the locking surface 62a1 at the rear end of the guide groove 62b of the fixed cam portion 62a in the axial direction. By this contact, the rearward movement of the knock button 9 relative to the tail crown 6 is restricted. On the front end surface of the knock button 9, an annular substantially saw-blade moving cam surface 92 that engages with the rotating cam surface 84 of the rotating cam 8 when the knock button 9 moves forward is formed.

The refill connection portion 7 is formed in a substantially cylindrical shape and connects the rotary cam 8 and the refill 3. The refill connection part 7 has a rear cylinder 71 at the rear part, and has a refill fitting cylinder 72 having a larger outer diameter and inner diameter than the rear cylinder 71 at the front part. The outer peripheral surface of the rear cylinder 71 is fitted to the inner peripheral surface of the large diameter portion 83 of the rotary cam 8. A flange 73 protruding outward in the radial direction is formed between the rear cylinder 71 and the refill fitting cylinder 72. The outer diameter of the flange 73 is formed larger than the outer diameter of the refill fitting cylinder 72, and the front surface of the flange 73 locks the rear end of the return spring 5 described later. Further, the inner peripheral surface 2a2 at the rear portion of the shaft cylinder 2 is formed larger than the inner peripheral surface 2a1 at the front portion, and a step portion 2c formed between the two engages the front end of the return spring 5 described later. . The outer peripheral surface of the flange 73 of the refill connection portion 7 is slidably adjacent to the inner peripheral surface 2a2 of the shaft tube 2.

A return that is a coil spring is provided between a step 2c formed between the front inner peripheral surface 2a1 and the rear inner peripheral surface 2a2 of the shaft cylinder 2 and the front surface of the flange 73 of the refill connection portion 7. The spring 5 is arranged compressed. The refill connection portion 7 is always urged rearward by the return spring 5.

The knock mechanism 10 is constituted by the knock button 9, the rotating cam 8, the tail crown 6, and the return spring 5 described above. When the user knocks the knock button 9, the slide protrusion 82a of the rotating cam 8 moves forward together with the knock button 9 and comes out of the guide groove 62b of the fixed cam portion 62a. At this time, the engagement target of the rotating cam surface 84 of the rotating cam 8 is shifted from the moving cam surface 92 of the knock button 9 to the fixed cam surface 63 of the fixed cam portion 62a, so that the refill 3 rotates by a predetermined amount. The rotating cam surface 84 of the rotating cam 8 is engaged with the fixed cam surface 63 while protruding from the tip of the shaft cylinder 2. When the user performs a knock operation again, the engagement target of the rotating cam surface 84 of the rotating cam 8 is shifted again from the fixed cam surface 63 of the fixed cam portion 62a to the moving cam surface 92 of the knock button 9. In this case, the rotating cam surface 84 of the rotating cam 8 is moved by the cam of the knock button 9 while the refill 3 rotates by a predetermined amount and is urged rearward by the return spring 5 and accommodated in the shaft cylinder 2. Re-engaged on surface 92. As described above, when the refill 3 is configured to rotate in accordance with the knocking operation, only a certain writing portion of the writing tip 31 of the refill 3 configured as the tip of the ballpoint pen in the present embodiment is unevenly worn due to writing, and the short term. It can be prevented from being damaged in a short time.

The refill 3 of the ballpoint pen according to the present embodiment is a container having a substantially cylindrical shape, and is filled with ink for writing. The writing tip 31 attached to the front end of the refill 3 protrudes forward from the tip opening 21a of the shaft tube 2 in the writing state of FIG. 1, and immerses in the front opening 21 of the shaft tube 2 in the housing state (not shown). In the accommodated state, the writing tip 31 of the refill 3 is accommodated in the shaft cylinder 2 and protected from external force.

The support member 4 is assembled between the outer peripheral surface 3b of the refill 3 of the ballpoint pen of the present embodiment and the inner peripheral surface 2a1 of the front portion of the shaft tube 2. As shown in FIG. 2, the support member 4 has a substantially C-shaped cross section and is formed in an annular shape having a notch at one place in the circumferential direction. The support member 4 can be attached to the refill 3 from the side (in the radial direction), and is configured such that its attachment position in the axial direction can be adjusted.

As shown in FIGS. 1 and 2, the support member 4 has an outer peripheral surface 4 b that is close to or in contact with the inner peripheral surface 2 a 1 of the shaft cylinder 2 and an inner peripheral surface 4 a that is in contact with the outer peripheral surface 3 b of the refill 3. Further, a notch 41 extending in the axial direction of the support member 4 is formed at one place in the circumferential direction of the support member 4. The support member 4 has elasticity capable of expanding the notch 41 in the circumferential direction, and can be assembled to the refill 3 from the side. If comprised in this way, the support member 4 can be easily assembled | attached to the refill 3, and also when replacing the refill 3, the support member 4 can be easily assembled. The support member 4 assembled to the refill 3 is configured to sandwich the refill 3 with a predetermined elastic force. For this reason, the support member 4 can move back and forth with respect to the shaft tube 2 together with the refill 3 in accordance with the knocking operation of the user.

The support member 4 is preferably attached to the refill 3 so as to limit the vibration of the refill 3 that is supported by the external force with its rear end supported in the shaft tube 2. If comprised in this way, when the refill 3 vibrates with the external force in the axial cylinder 2, it can prevent that the refill 3 collides with the internal peripheral surface of the axial cylinder 2, and is damaged. In particular, when the front end portion of the refill 3 in front of the support member 4 cantilevered by the attached support member 4 is vibrated by a predetermined external force, the refill 3 is the inner peripheral surface 2a1 or the tip opening 21a of the shaft tube 2. The support member 4 is preferably assembled at a predetermined position in the axial direction so as not to collide with each other. For example, as shown in FIG. 1, the support member 4 may be disposed in front of the half of the full length of the refill 3 (front half).

Since the vibration of the refill 3 in the shaft cylinder 2 varies depending on the rigidity of the refill 3, the support method of the refill 3, the position where the refill 3 is supported, and the external force applied to the refill 3, the arrangement position of the support member 4 in the axial direction is It is good to adjust according to the applied external force. The support member 4 assembled to the refill 3 of this embodiment can be easily adjusted by the user in the arrangement position in the axial direction. For example, when the user shakes the writing instrument 1 in which the refill 3 is accommodated in the shaft tube 2 by applying a predetermined external force, the user does not collide with the inner peripheral surface of the shaft tube 2. The arrangement position of the support member 4 can be adjusted while confirming that there is no. Or before a user uses, it is good also as what adjusts the arrangement position of support member 4 similarly. The predetermined external force can be an arbitrary external force determined by the user. For example, the predetermined external force may be the maximum external force that is applied when the user handles the writing instrument 1, or the writing instrument 1 may be a predetermined high force. It is good also as an external force equivalent to the external force loaded when it is dropped. In these cases, the support member 4 can be disposed at an appropriate position in the axial direction that protects the refill 3 of the writing instrument 1.

In other embodiments, the support member 4 may be formed of a shock absorbing material. In this case, although the elasticity of the support member 4 is reduced as compared with the present embodiment, it is possible to absorb a constant impact from the outside, and thus more suitably suppress the vibration of the refill in the shaft tube. be able to.

In the writing instrument 1 of the present embodiment, the return spring 5 is further arranged behind the support member 4. In this case, since the support member 4 is cantilever-supported, a return spring is provided around the refill 3 disposed in front of the support member 4 that easily swings in a direction orthogonal to the axial direction when an external force is applied. Will never be placed. For this reason, it is possible to prevent the refill 3 ahead of the support member 4 cantilevered by the support member 4 from colliding with the return spring. For this reason, the refill 3 can be further sufficiently protected.

In the writing instrument 1 of the present embodiment, the refill 3 is supported at two locations, that is, the refill connection portion 7 fitted to the rear end thereof and the support member 4 assembled to the front portion thereof, thereby being orthogonal to the axial direction of the refill 3. The refill 3 can be protected by suitably restricting the movement in the direction in which the refill is performed. Further, even when an external impact is applied to the writing instrument 1 and the refill 3 when the refill 3 is stored by a knocking operation or when the writing instrument 1 is dropped, the amplitude of vibration in the shaft cylinder 2 of the refill 3 is suppressed to a predetermined amount or less. can do. Therefore, the writing instrument 1 of the present embodiment includes the support member 4 so that the inner peripheral surfaces 2a1 and 2a2 of the shaft tube 2 collide with the refill 3, in particular, the writing tip 31 and the inner peripheral surface 2a1 of the shaft tube 2 and The impact on the refill 3 applied from the outside can be reduced as compared with the conventional case. Furthermore, since the support member 4 has a notch 41 and is assembled from the side of the refill 3 so as to support the front portion of the refill 3 in a cantilevered manner, the assembly of the support member 4 and the assembly of the writing instrument 1 can be performed easily. Can do.

Next, a modified example of the configuration of the support member 4 of the embodiment described above will be described. The writing instrument according to this modification is the same as the writing instrument 1 shown in FIGS. 1 and 2 described above except that the configuration of the support member is different. The support member of this modification has an outer peripheral surface that contacts the inner peripheral surface 2 a 1 of the shaft cylinder 2 and an inner peripheral surface that approaches or contacts the outer peripheral surface 3 b of the refill 3. Similarly to the support member 4 shown in FIG. 2, a notch extending in the axial direction of the support member is formed at one place in the circumferential direction of the support member. The support member of this modification has elasticity that can reduce the notch in the circumferential direction, and can be assembled to the shaft tube 2 from the rear. Therefore, the support member is assembled to the inner peripheral surface of the shaft tube 2, and the refill 3 can move back and forth relative to the shaft tube 2 and the support member of this modification. In yet another embodiment in which the front opening 21 in FIG. 1 is formed as a separate body from the shaft tube 2, the support member shown in this modification can be assembled to the shaft tube from the front.

Even when the support member of this modification is used, the writing instrument including the support member of this modification is provided with the support member, as in the above-described embodiment, so that the inner peripheral surfaces 2a1 and 2a2 of the shaft cylinder 2 are provided. And the refill 3 can be prevented, and the impact applied to the refill 3 from the outside can be reduced as compared with the prior art.

(Second Embodiment)
Next, a second embodiment will be described. FIG. 3 is a longitudinal sectional view of the writing instrument 1A of the second embodiment. The writing instrument 1 </ b> A of the present embodiment is an electronic input device as an electronic pen using the electronic input body 3 </ b> A as the refill 3. The electronic input body 3A is a writing core used for an input instruction to an electronic writing surface such as a touch panel. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

The electronic input body 3A, for example, applies a change in capacitance and current to a detection unit on the electronic writing surface (not shown), and detects the indicated position on the electronic writing surface and the inclination angle of the writing tool 1A with respect to the electronic writing surface. Can do. The electronic input body 3A includes, for example, a reception unit and a transmission unit, and further transmits a writing pressure detected by the writing instrument 1A and a selection signal for writing or erasing input by the user to the writing instrument 1A to the electronic writing surface side. can do.

As a specific example, the electronic writing surface and the electronic input body 3A include an electromagnetic induction coil as an electromagnetic wave transmission / reception unit. The electronic input body 3A receives an electromagnetic wave output from a specific coordinate position on the electronic writing surface and obtains electric power by electromagnetic induction. Further, the electronic input body 3A performs necessary information processing using the obtained electric power, and returns information such as writing or erasing selection and writing pressure input by the user to the electronic writing surface side. Thereby, the electronic writing surface side can detect what coordinates the electronic input body 3A indicates, and what kind of writing input is made by the electronic input body 3A.

Also in the writing instrument 1A of the present embodiment, the support member 4 is assembled between the outer peripheral surface 3b of the electronic input body 3A and the inner peripheral surface 2a1 of the shaft tube 2 as in the writing instrument 1 of the first embodiment. For this reason, the electronic input device which can reduce the impact to the electronic input body 3A applied from the outside can be comprised compared with the past, and the electronic components and precise mechanism contained in the electronic input body 3A of the writing instrument 1A can be constructed. It can protect against vibration and shock.

Since the support member 4 of this embodiment is assembled to the electronic input body 3A from the side, physical contact to the electronic input body 3A including precision electronic components that are weak to physical contact can be minimized. Further, since the vibration of the electronic input body 3A in the shaft tube 2 can be suitably suppressed by assembling the support member 4 to the electronic input body 3A, the electronic input body 3A collides with the shaft tube 2 due to the vibration. In addition to preventing damage, the accuracy of electronic input by the electronic input body 3A can be improved.

Furthermore, in this embodiment, the return spring 5 that is a coil spring is disposed behind the support member 4. For this reason, a metal coil is not arranged around the electronic input body 3A, and the coil spring inhibits electromagnetic induction and information communication between the electronic writing surface and the electronic input body 3A. There is no.

DESCRIPTION OF SYMBOLS 1,1A Writing instrument 2 Shaft cylinder 2a1 Inner peripheral surface 2a2 Inner peripheral surface 2b Outer peripheral surface 2c Step part 3 Refill 3A Electronic input body 3b Outer peripheral surface 4 Support member 4a Inner peripheral surface 4b Outer peripheral surface 5 Return spring 6 Tail crown 7 Refill connection part 8 Rotating Cam 9 Knock Button 10 Knock Mechanism 21 Front Portion 21a Tip Opening 22 Clip 22a Fixed Part 31 Writing Tip 41 Notch 61 Rear Cylinder Part 62 Front Cylinder Part 62a Fixed Cam Part 62a1 Locking Surface 62b Guide Groove 63 Fixed Cam Surface 71 Rear cylinder 72 Refill fitting cylinder 73 Flange 81 Small diameter part 82 Medium diameter part 82a Slide projection 83 Large diameter part 84 Rotating cam surface 85 Flange 91 Front tube 91a Slide projection 92 Moving cam surface

Claims

A barrel,
A refill that can be accommodated in the barrel;
A support member assembled between the shaft cylinder and the refill;
A return spring disposed rearward of the support member and biasing the refill backward.
The support member may collide with the inner peripheral surface or the tip opening of the shaft tube when the front portion of the refill supported by the support member is vibrated by a predetermined external force. Not assembled in a predetermined position in the front-rear direction,
Writing instrument characterized by that.
The support member is assembled to the refill from the side, and has an outer peripheral surface that is close to or in contact with the inner peripheral surface of the shaft cylinder, and an inner peripheral surface that is in contact with the outer peripheral surface of the refill. The writing instrument according to claim 1, wherein a notch extending in an axial direction of the support member is formed at one place, and the notch has elasticity capable of expanding the notch in the circumferential direction.
The support member is assembled to the shaft cylinder from the front or the rear, and has an outer peripheral surface that contacts the inner peripheral surface of the shaft cylinder, and an inner peripheral surface that approaches or contacts the outer peripheral surface of the refill. The writing instrument according to claim 1, wherein a notch extending in the axial direction of the support member is formed at one position in the direction, and the notch has elasticity capable of reducing the notch in the circumferential direction.
The writing instrument according to any one of claims 1 to 3, wherein the refill is an electronic input body as an electronic input device.
The writing instrument according to any one of claims 1 to 4, wherein the support member is formed of an impact absorbing material.