Soft member mounting structure

Abstract

To provide a soft member mounting structure, which enables the soft member to be quickly and easily replaced and prevents loss of parts.SOLUTION: Provided is a soft member mounting structure in which a soft member 3 is attached to the rear end of a cylindrical body 1 constituting a writing instrument 4. A cylindrical body 1 has a lid body 2 at its rear end. The cylindrical body 1 and the lid body 2 are inseparably connected. The relative positions of the cylindrical body 1 and the lid body 2 are changeable. The cylindrical body 1 has a fitting portion 11. The lid body 2 has a fitted portion 21 that can be freely engaged with and detached from the fitting portion 11. When the fitting portion 11 and the fitted portion 21 are fitted together, the soft member 3 is clamped and fixed by the lid body 2 and the cylindrical body 1. When the fitting portion 11 and the fitted portion 21 are detached from each other, the soft member 3 is attachable to or detachable from the cylindrical body 1.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a soft member attachment structure, and more particularly to a soft member attachment structure for attaching a soft member to the rear end of a cylindrical body that constitutes a writing instrument. [Background technology]

[0002] Conventionally, Patent Document 1 discloses a multi-lead writing instrument in which a crown having an elastic portion (corresponding to the soft member of the present invention) is detachably attached to the rear of a barrel by screw fitting. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-49192 A Summary of the Invention [Problem to be solved by the invention]

[0004] The structure of Patent Document 1 requires the crown to be rotated more than once when attaching or detaching, which may make it difficult to quickly replace the elastic part. In addition, since the crown is detachable from the barrel, there is a risk that the elastic part may be lost along with the crown.

[0005] The present invention aims to solve the above-mentioned problems of the conventional art by providing a mounting structure for a soft member that allows the soft member to be quickly and easily replaced and prevents loss of parts. In the present invention, when the cylindrical body is a barrel of a writing implement, "front" refers to the pen tip side and "rear" refers to the opposite side. The axial direction is the longitudinal direction of the writing implement. The radial direction is the direction perpendicular to the axial direction. The circumferential direction is the circumferential direction centered on the axial direction. [Means for solving the problem]

[0006] The first invention of the present application is A soft member attachment structure for attaching a soft member to a rear end of a cylindrical body constituting a writing instrument, The cylindrical body has a lid at a rear end, The cylindrical body and the lid body are inseparably connected to each other, The relative position of the cylinder body and the lid body is variable, The cylindrical body includes a fitting portion, The lid body has a fitted portion that can be freely engaged with and disengaged from the fitting portion, When the fitting portion and the fitted portion are fitted together, the soft member is clamped and fixed between the lid body and the cylindrical body, When the fitting portion and the fitted portion are separated from each other, the soft member is detachable from the cylindrical body.

[0007] The soft member mounting structure of the first invention has the above-mentioned configuration, and by engaging and disengaging the lid from the cylindrical body, the soft member can be easily detached from the writing instrument and replaced. Also, since the cylindrical body and the lid are inseparable, there is no risk of losing the lid.

[0008] The second invention of the present application is the mounting structure for a soft member of the first invention, The cylindrical body or the lid body includes an engagement portion, The soft member includes an engaged portion, It is preferable that the engagement between the engaging portion and the engaged portion prevents the soft member from moving in a direction perpendicular to the direction in which the soft member is clamped.

[0009] The soft member mounting structure of the second invention has the above-mentioned configuration, so that when the soft member is attached to the cylindrical body, the position of the soft member does not shift relative to the cylindrical body, and the soft member can be stably attached to the cylindrical body.

[0010] The third invention of the present application is the mounting structure for a soft member according to the second invention, It is preferable that the engaging portion and the engaged portion have a non-circular cross-sectional shape, so that circumferential rotation of the soft member is prevented.

[0011] In the soft member mounting structure of the third invention, due to the above configuration, the soft member does not rotate relative to the cylindrical body, and the soft member can be stably mounted to the cylindrical body.

[0012] A fourth aspect of the present invention is the mounting structure for a soft member according to any one of the first to third aspects of the present invention, The cylinder body and the lid body are rotatably connected via a hinge, The lid body can be opened and closed with respect to the cylinder body about the hinge, It is preferable that the fitting portion and the fitted portion are engaged and disengaged by opening and closing the lid.

[0013] The soft member mounting structure of the fourth invention has the above-mentioned configuration, which allows the lid to be opened and closed easily, and makes it easy to attach and detach the soft member. Effect of the Invention

[0014] According to the soft member mounting structure of the present invention, it is possible to obtain a soft member mounting structure that allows the soft member to be replaced quickly and easily and prevents loss of parts. [Brief description of the drawings]

[0015] [Figure 1] 1 is a front view showing a writing instrument using the soft member mounting structure of the present invention. [Diagram 2] 1A is a front view showing a pen tip protruding state of a writing implement using the soft member mounting structure of the present invention, and FIG. [Diagram 3] 2 is an enlarged view of a main part of the device with the cover of FIG. 1 opened and the soft member removed. [Figure 4] 4 is an enlarged view of a main part of FIG. 3 with the cover closed. FIG. [Diagram 5] 10A to 10C are enlarged perspective views of essential parts showing a procedure for attaching a lid to a cylindrical body. [Figure 6] 10A to 10C are enlarged perspective views of essential parts showing a procedure for attaching and detaching a soft member to and from a cylindrical body. [Figure 7] FIG. 4 is an enlarged perspective view of a main portion showing a state in which a soft member is installed in a cylindrical body. [Figure 8] 8 is an enlarged perspective view of a main part showing a state in which the cover of FIG. 7 is closed. FIG. [Figure 9] 1A is a longitudinal sectional view showing a soft member, and FIG. [Figure 10] 13(a) is a longitudinal sectional view showing a modified example of the soft member, and FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] 1 to 10 show an embodiment of the present invention.

[0017] ·Cylinder body The cylindrical body 1 is a cylindrical body obtained by injection molding of a synthetic resin. As shown in Figures 3 and 6, a fitting portion 11 that can be engaged with and disengaged from a fitted portion 21 of the lid body 2 is provided at the rear end of the cylindrical body 1. The fitting portion 11 is a protrusion that protrudes axially rearward. The rear end of the fitting portion 11 is provided with an outward protrusion 12 that protrudes radially outward.

[0018] A base 14 that protrudes axially rearward is provided at the rear end of the cylindrical body 1. A circular recessed hinge recess 15 is formed at a symmetrical position that clamps the base 14. The base 14 is formed at a position shifted radially outward with respect to the axis of the cylindrical body 1. In this embodiment, a clip 16 is provided on the outside of the cylindrical body 1, and the base 14 is provided at the rear end of the clip 16.

[0019] The rear end of the cylindrical body 1 is provided with an engaging portion 13 that engages with the front engaged portion 33a of the soft member 3. The engaging portion 13 is a protrusion that projects axially rearward. The outer shape of the engaging portion 13 matches the inner shape of the engaged portion 33 of the soft member 3, and the engaging portion 13 and the engaged portion 33 can engage with each other. The engagement of the engaging portion 13 and the engaged portion 33 prevents the soft member 3 from moving in a direction perpendicular to the direction in which the soft member 3 is clamped (i.e., the axial direction) (i.e., the radial direction).

[0020] The cross-sectional shape of the engaging portion 13 is formed into a substantially equilateral triangle. As shown in FIG. 9, the cross-sectional shape of the engaged portion 33 of the soft member 3 is also formed into a substantially equilateral triangle. By forming the cross-sectional shapes of the engaging portion 13 and the engaged portion 33 into a non-circular shape, it is possible to suppress circumferential rotation of the soft member 3 when the engaging portion 13 and the engaged portion 33 engage with each other. The cross-sectional shapes of the engaging portion 13 and the engaged portion 33 may be non-circular, and may be polygonal shapes other than an equilateral triangle. In addition, the cross-sectional shapes of the engaging portion 13 and the engaged portion 33 do not need to be the same as long as they are in partial surface contact. (For example, a combination of a square and a regular hexagon.)

[0021] Lid The cover 2 is made of a disk obtained by injection molding of a synthetic resin. The outer diameter of the cover 2 is set to be smaller than the outer diameter of the cylindrical body 1.

[0022] As shown in FIG. 5, the front surface of the lid 2 is provided with a fitted portion 21 that can be radially detached from the fitting portion 11 of the cylindrical body 1. The fitted portion 21 is a hole that penetrates the lid 2 in the axial direction. The inner surface of the fitted portion 21 is provided with an inward protrusion 22 that protrudes radially inward. The fitted portion 21 is divided into left and right parts by a central notch, and the inward protrusion 22 is also divided into left and right parts. Since the fitted portion 21 is divided into left and right parts, it becomes easier for the fitted portion 21 to spread out left and right, making it easier to fit with the fitting portion 11.

[0023] A connection portion 23 is provided on a part of the outer peripheral surface of the side wall of the lid body 2. The connection portion 23 is made of two plate-like bodies extending radially outward from the disk of the lid body 2 and is capable of sandwiching the base portion 14 from the left and right. Hinge protrusions 24 in the form of circular protrusions are provided facing each other on the inner surface of the connection portion 23.

[0024] Similar to the engaging portion 13 of the cylindrical body 1, the lid 2 may also be provided with an engaging portion. In particular, when the cross-sectional shape of the lid 2 is non-circular, it is possible to suppress circumferential rotation of the soft member 3 when the engaging portion and the engaged portion engage with each other. In this embodiment, the outer peripheral surface of the side wall of the lid 2 serves as the engaging portion.

[0025] An uneven anti-slip surface may be provided on the front surface of the lid 2. By bringing the anti-slip surface and the soft member 3 into pressure contact, the soft member 3 can be attached to the cylindrical body 1 more stably.

[0026] Attaching the lid to the cylinder As shown in FIG. 5, when the base 14 of the cylindrical body 1 and the connection part 23 of the lid body 2 are fitted in the direction of the arrow, the hinge recess 15 and the hinge protrusion 24 are fitted together as shown in FIG. 6. The hinge recess 15 and the hinge protrusion 24 are fitted together to form a hinge. The lid body 2 can be opened and closed relative to the cylindrical body 1 with the hinge as an axis. When the lid body 2 is closed, the fitting part 11 and the fitted part 21 are fitted together, and when the lid body 2 is opened, the fitting part 11 and the fitted part 21 are separated from each other. As shown in FIG. 4, when the lid body 2 is closed, a gap G exists between the rear end surface of the cylindrical body 1 and the front end surface of the lid body 2.

[0027] The connection 23 between the cylinder 1 and the lid 2 does not have to be hinge-shaped. For example, the cylinder 1 and the lid 2 may be connected with a string, or the cylinder 1 and the lid 2 may be connected with a bendable soft plate-like member.

[0028] Soft materials 9, the soft member 3 is a cylinder having a notch. The soft member 3 is made of an elastic material such as synthetic rubber or elastomer. For example, a friction-induced color-changing member that rubs the surface of thermochromic handwriting to thermally change the color of the handwriting is used as the soft member 3.

[0029] The outer diameter of the soft member 3 is set to be approximately the same as the outer diameter of the cylindrical body 1. Because the outer diameter of the lid body 2 is smaller than the outer diameter of the cylindrical body 1, the soft member 3 can be made to protrude rearward from the lid body 2 while keeping the outer diameter of the soft member 3 approximately the same as the outer diameter of the cylindrical body 1. Since the soft member 3 protrudes rearward from the lid body 2, it becomes easy to rub handwriting.

[0030] The soft member 3 has a clamped portion 31 on its inner surface. The clamped portion 31 is provided in a plate shape on the inner surface of the cylindrical body of the soft member 3. The thickness T of the clamped portion 31 is set to be slightly larger than the gap G between the rear end surface of the cylindrical body 1 and the front end surface of the lid body 2 when the lid body 2 is closed. Since the thickness T of the clamped portion 31 is larger than the gap G, the soft member 3 is pressed against the rear end of the cylindrical body 1 and the front end of the lid body 2, and the soft member 3 can be stably attached to the cylindrical body 1 without rattling.

[0031] A portion of the circumference of the soft member 3 is cut out by a notch portion 32. The width A of the notch portion 32 is set to be slightly larger than the width of the connecting portion 23. By making the width A of the notch portion 32 slightly larger than the width of the connecting portion 23, it is possible to prevent interference between the connecting portion 23 and the soft member 3 when the soft member 3 is attached to the cylindrical body 1. Furthermore, the notch portion 32 and the connecting portion 23 are caught, so that rotation in the circumferential direction of the soft member 3 can be prevented. Because the notch portion 32 can prevent rotation in the circumferential direction of the soft member 3, it is not necessary to provide a front engaged portion 33a, for example, as shown in FIG. 10.

[0032] The soft member 3 has an engaged portion 33 on its inner surface. In this embodiment, the soft member 3 has two engaged portions, a front portion and a rear portion. The front engaged portion 33a is provided penetrating the clamped portion 31. The cross-sectional shape of the front engaged portion 33a matches the cross-sectional shape of the engaging portion 13 of the cylindrical body 1. The rear engaged portion 33b is provided on the inner surface of the soft member 3 behind the clamped portion 31. The cross-sectional shape of the rear engaged portion 33b matches the cross-sectional shape of the outer peripheral surface of the lid body 2.

[0033] - Installation of soft parts The procedure for attaching the soft member 3 to the cylindrical body 1 will be described. As shown in FIG. 6, in a state where the lid body 2 is open relative to the cylindrical body 1, the engaging portion 13 of the cylindrical body 1 and the front engaged portion 33a of the soft member 3 are engaged, and the soft member 3 is placed at the rear end of the cylindrical body 1 as shown in FIG. 7. Finally, the lid body 2 is closed relative to the cylindrical body 1, and the engaging portion 11 of the cylindrical body 1 and the engaged portion 21 of the lid body 2 are engaged as shown in FIG. 8. By closing the lid body 2, the soft member 3 is clamped and fixed between the rear end of the cylindrical body 1 and the front end of the lid body 2. When the soft member 3 is to be removed from the cylindrical body 1, the lid body 2 is opened relative to the cylindrical body 1, and the soft member 3 can be removed.

[0034] ·Writing instruments An example in which the attachment structure for a soft member of the present invention is applied to a multi-core writing instrument is shown in Figures 1 and 2. In Figures 1 and 2, a cylindrical body 1 is a barrel that constitutes a writing instrument 4. Note that the attachment structure for a soft member of the present invention can be applied to various writing instruments, not limited to multi-core writing instruments.

[0035] ·Front axis Front barrel 5 is obtained by injection molding of synthetic resin. Front barrel 5 is a cylindrical body. Pen tip 62 can be projected and retracted from a tip opening 51 of front barrel 5. The rear end of front barrel 5 and the front end of cylindrical body 1 are connected by screwing.

[0036] ·Cursive The writing body 6 is accommodated inside the cylinder 1 as shown in FIG. 2(b). The writing body 6 is composed of an ink reservoir tube 61 and a pen tip 62. The ink reservoir tube 61 is obtained by injection molding or extrusion molding of synthetic resin. The pen tip 62 is a ballpoint pen tip made of metal or synthetic resin. A sliding body 7 is attached to the rear of the writing body 6. The sliding body 7 is colored the same color as the writing ink accommodated in the ink reservoir tube 61 of the writing body 6.

[0037] Three elongated sliding grooves extending in the front-rear direction are formed at 120 degree intervals in the rear of the cylindrical body 1. Three coil springs are arranged in front of the sliding grooves inside the cylindrical body 1, and bias the writing body 6 and the sliding body 7 backward.

[0038] To make the pen tip 62 protrude from the tip opening 51, one of the sliding bodies 7 is slid axially forward along the sliding groove from the state shown in FIG. 1, whereby an engagement protrusion (not shown) formed on the sliding body 7 is engaged with a locking portion (not shown) formed inside the cylindrical body 1, and the protruding state of the pen tip 62 is maintained as shown in FIG. 2(a).

[0039] To retract the pen tip 62 from the tip opening 51, the other sliding body 7 that is not being slid is slid axially forward, whereby the sliding body 7 is released from its engagement and the pen tip 62 can be retracted into the front barrel 5 by the coil spring.

[0040] In this embodiment, the cylindrical body 1 only needs to constitute at least a part of the writing instrument 4, and the cylindrical body 1 may constitute substantially the entire writing instrument 4, or the cylindrical body 1 may constitute only the rear end portion of the writing instrument 4. In the present invention, the configuration for fixing the pen tip 62 to the cylindrical body 1 may be, for example, a configuration in which the pen tip 62 is directly fixed to the cylindrical body 1, or a configuration in which the pen tip 62 is fixed to the cylindrical body 1 via another member such as the front shaft 5. The cylindrical body 1 may also be a cap that protects the pen tip of the writing instrument.

[0041] With the above-mentioned configuration, it is possible to obtain a mounting structure for a soft member that allows the soft member to be replaced quickly and easily and prevents loss of parts. [Explanation of symbols]

[0042] 1 cylinder 11 Fitting part 12 External process 13 Engagement part 14 Base 15 Hinge recess 16 clips 2 Lid 21 Engaged part 22 Introvert process 23 Connection 24 Hinge protrusion 3 Soft materials 31 Clamped part 32 Notch 33 Engaged part 33a Front engaged part 33b Rear engaged part 4 Writing instruments 5 Front axle 51 Tip opening 6 Cursive 61 Ink container 62 Pen tip 7 Slider A Width of the notch G Gap T Thickness of the clamped part

Claims

1. A soft member attachment structure for attaching a soft member to a rear end of a cylindrical body constituting a writing instrument, The cylindrical body has a lid at a rear end, The cylindrical body and the lid body are inseparably connected to each other, The relative position of the cylinder body and the lid body is variable, The cylindrical body includes a fitting portion, The lid body has a fitted portion that can be freely engaged with and disengaged from the fitting portion, When the fitting portion and the fitted portion are fitted together, the soft member is clamped and fixed between the lid body and the cylindrical body, A mounting structure for a soft member, characterized in that, when the fitting portion and the fitted portion are separated from each other, the soft member is detachable from the cylindrical body.

2. The cylindrical body or the lid body includes an engagement portion, The soft member includes an engaged portion, 2. The soft member mounting structure according to claim 1, wherein the engagement between the engaging portion and the engaged portion prevents the soft member from moving in a direction perpendicular to the direction in which the soft member is clamped.

3. 3. The soft member mounting structure according to claim 2, wherein the engaging portion and the engaged portion have non-circular cross-sectional shapes, thereby preventing the soft member from rotating in the circumferential direction.

4. The cylinder body and the lid body are rotatably connected via a hinge, The lid body can be opened and closed with respect to the cylinder body about the hinge, 4. The soft member mounting structure according to claim 1, wherein the fitting portion and the fitted portion are engaged and disengaged by opening and closing the lid.

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