Notepads

Abstract

To provide a writing instrument that has a clip formed by a wire, allowing the clip to be lifted without operation by both hands.SOLUTION: A writing instrument 1 includes: a writing instrument main body 7 that extends in a longer direction; and a clip member 8 that is formed by a wire held on a side part of the writing instrument body 7. A middle part 8B in the longer direction of the clip member 8 is held on the side part of the writing instrument main body 7, and the clip member 8 is energized toward the writing instrument main body 7 so that a leading end 8A of the clip member 8 in the longer direction abuts the writing instrument main body 7. By pressing a rear end 8C of the clip member 8 toward the writing instrument main body 7, the clip member 8 rotates so that the leading end 8A of the clip member 8 alienates from the writing instrument main body 7.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a writing instrument, and more particularly to a writing instrument having a writing instrument body and a clip whose middle portion is rotatably supported on a side portion of the writing instrument body. [Background technology]

[0002] Conventionally, writing instruments such as ballpoint pens and mechanical pencils have been known that have a clip at the rear end of the writing instrument body. For example, Patent Document 1 discloses a writing instrument with a clip made of a single elastic metal wire. In this writing instrument, the single elastic metal wire is bent into a U-shape from the bottom base, and both ends are attached to a pair of mounting holes formed on the sides of the writing instrument body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-39940 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the invention described in Patent Document 1, when opening the clip from the writing instrument body, the user must hold the writing instrument body and move the tip side of the clip away from the writing instrument body. Therefore, in order to open the clip, the user must hold the writing instrument body with one hand and lift the tip side of the clip with the other hand, which requires operating the writing instrument with both hands, which is very inconvenient.

[0005] The present invention has been made in consideration of the above problems, and has as its object to provide a writing instrument that has a clip made of a wire material and that can be opened without using both hands. [Means for solving the problem]

[0006] The writing instrument of the present invention is a writing instrument comprising a writing instrument body extending in the longitudinal direction and a clip member made of wire held on the side of the writing instrument body, wherein the longitudinal middle portion of the clip member is held on the side of the writing instrument body, the clip member is biased toward the writing instrument body so that the longitudinal portion of the clip member on the brush tip side abuts against the writing instrument body, and by pressing the rear portion of the clip member toward the writing instrument body, the longitudinal portion of the clip member on the brush tip side rotates so as to move away from the writing instrument body.

[0007] According to the present invention having the above configuration, by holding the writing instrument body with the index finger, middle finger, ring finger, and little finger of one hand and pushing in the rear of the clip member, the tip of the clip member is separated from the writing instrument body, allowing the clip member and the writing instrument body to be opened, and the writing instrument can be operated with one hand.

[0008] In the present invention, the clip member is preferably formed by bending a wire, with both ends of the wire attached to a pair of mounting portions formed on the sides of the writing instrument body, and the clip member is bent into a shape such that the longitudinal portion of the clip member on the brush tip side is urged toward the writing instrument body due to the elasticity of the wire constituting the clip member.

[0009] According to the present invention having the above configuration, the portion of the clip member on the brush tip side is biased toward the writing instrument body due to the elasticity of the wire material that constitutes the clip member, so the clip member can be constructed with a simple structure without using a biasing member such as a spring.

[0010] In the present invention, preferably, the pair of mounting portions are each formed by a hole or cutout extending laterally, a bent portion is formed at at least one end of both ends of the wire, the mounting portion corresponding to at least one end has a recess portion that is wider than the base end, and the bent portion is located within the recess portion.

[0011] According to the present invention having the above configuration, a bent portion is formed at least on one end of the wire, and this bent portion is disposed within the recess, so that the end of the wire can be prevented from coming off the attachment portion.

[0012] In the present invention, preferably, at least a part of the clip member has a figure formed by bending a wire.

[0013] According to the present invention having the above configuration, the clip member can be given a design feature.

[0014] In the present invention, preferably, the writing instrument body has a cylindrical barrel and an inner barrel arranged inside the barrel, one of the pair of mounting holes being a through hole, one end of the clip member being arranged and held within the through hole, and the through hole being formed at the boundary surface between the barrel and the inner barrel.

[0015] According to the present invention having the above configuration, the clip member is held by the through hole, thereby preventing the clip member from easily coming off, and since the through hole is located at the boundary surface between the shaft tube and the inner tube, the clip member can be easily placed within the through hole. [Effects of the Invention]

[0016] According to the present invention, a writing implement is provided that includes a clip member made of a wire material and that allows the clip member to be lifted without using both hands. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view showing a writing implement according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a front view showing the writing implement according to the first embodiment of the present invention. [Figure 3] FIG. 3 is a side view showing the writing implement according to the first embodiment of the present invention. [Figure 4] 2 is a cross-sectional view taken along the axial direction of the barrel of the writing implement shown in FIG. 1. FIG. [Figure 5A]2 is a perspective view showing the inner barrel of the writing instrument shown in FIG. 1. FIG. [Figure 5B] 2 is a front view showing the inner barrel of the writing instrument shown in FIG. 1. [Figure 5C] 2 is a right side view showing the inner barrel of the writing instrument shown in FIG. 1. FIG. [Figure 5D] 2 is a left side view showing the inner barrel of the writing instrument shown in FIG. 1. FIG. [Figure 5E] 5C is a cross-sectional view of FIG. 5B taken along the line E-E. [Figure 5F] FIG. 5D is a cross-sectional view of FIG. 5C. [Figure 6A] 2 is a perspective view showing a clip member of the writing implement shown in FIG. 1. FIG. [Figure 6B] 2 is a front view showing a clip member of the writing implement shown in FIG. 1. FIG. [Figure 6C] 2 is a side view showing the clip member of the writing implement shown in FIG. 1. FIG. [Figure 7] 1 is a side view showing a state in which the clip of the writing implement according to the first embodiment of the present invention is open. [Figure 8] FIG. 10 is a perspective view showing a writing implement according to a second embodiment of the present invention. [Figure 9] FIG. 4 is a front view showing a writing implement according to a second embodiment of the present invention. [Figure 10] FIG. 4 is a side view showing a writing implement according to a second embodiment of the present invention. [Figure 11] 9 is a cross-sectional view of the barrel of the writing implement shown in FIG. 8 taken along the axial direction. [Figure 12A] FIG. 9 is a perspective view showing the inner barrel of the writing instrument shown in FIG. 8. [Figure 12B] FIG. 9 is a front view showing the inner barrel of the writing instrument shown in FIG. 8. [Figure 12C] 9 is a right side view showing the inner barrel of the writing instrument shown in FIG. 8. [Figure 12D] 9 is a left side view showing the inner barrel of the writing instrument shown in FIG. 8. FIG. [Figure 12E] 12D is a cross-sectional view of FIG. 12C taken along the line E-E. [Figure 12F] FIG. 12C is a cross-sectional view of FIG. 12B. [Figure 12G] 12C is a cross-sectional view of FIG. [Figure 13A] 9 is a perspective view showing a clip member of the writing implement shown in FIG. 8. FIG. [Figure 13B] 9 is a front view showing the clip member of the writing implement shown in FIG. 8. FIG. [Figure 13C] 9 is a side view showing the clip member of the writing implement shown in FIG. 8. FIG. [Figure 14A] FIG. 10 is a front view (part 1) illustrating a method for attaching a clip member to a writing implement according to a second embodiment of the present invention. [Figure 14B] FIG. 10 is a side view (part 1) illustrating a method for attaching a clip member to a writing implement according to a second embodiment of the present invention. [Figure 15A] FIG. 10 is a front view (part 2) illustrating a method for attaching the clip member of the writing implement according to the second embodiment of the present invention. [Figure 15B] FIG. 10 is a side view (part 2) illustrating a method for attaching the clip member of the writing implement according to the second embodiment of the present invention. [Figure 16] FIG. 10 is a front view (part 3) illustrating a method for attaching the clip member of the writing implement according to the second embodiment of the present invention. [Figure 17] FIG. 10 is a side view showing a state in which the clip of a writing implement according to a second embodiment of the present invention is open. [Figure 18] FIG. 10 is a perspective view showing a writing implement according to a third embodiment of the present invention. [Figure 19A] 19 is a perspective view showing a clip member of the writing implement shown in FIG. 18. FIG. [Figure 19B] 19 is a front view showing the clip member of the writing implement shown in FIG. 18. FIG. [Figure 19C] 19 is a side view showing the clip member of the writing implement shown in FIG. 18. FIG. [Figure 20A] FIG. 10 is a perspective view showing the inner barrel of a writing instrument according to a fourth embodiment of the present invention. [Figure 20B] FIG. 10 is a front view showing the inner barrel of a writing instrument according to a fourth embodiment of the present invention. [Figure 20C] FIG. 10 is a right side view showing the inner barrel of a writing instrument according to a fourth embodiment of the present invention. [Figure 20D]FIG. 10 is a left side view showing the inner barrel of a writing instrument according to a fourth embodiment of the present invention. [Figure 20E] 20D is a cross-sectional view of FIG. 20C taken along the line E-E. [Figure 20F] FIG. 20C is a cross-sectional view of FIG. 20B. [Figure 20G] 20C is a cross-sectional view of FIG. [Figure 21] FIG. 10 is a perspective view showing a writing implement according to a fifth embodiment of the present invention. [Figure 22] FIG. 10 is a front view showing a writing implement according to a fifth embodiment of the present invention. [Figure 23] FIG. 10 is a side view showing a writing implement according to a fifth embodiment of the present invention. [Figure 24] 22 is a cross-sectional view taken along the axial direction of the barrel of the writing implement shown in FIG. 21. FIG. [Figure 25A] FIG. 10 is a perspective view showing the rear barrel of a writing instrument according to a fifth embodiment of the present invention. [Figure 25B] FIG. 10 is a front view showing the rear barrel of a writing implement according to a fifth embodiment of the present invention. [Figure 25C] FIG. 10 is a side view showing the rear barrel of a writing instrument according to a fifth embodiment of the present invention. [Figure 25D] FIG. 25D is a cross-sectional view taken along the line DD in FIG. 25C, showing the rear barrel of a writing implement according to a fifth embodiment of the present invention. [Figure 25E] 25B shows a rear barrel of a writing implement according to a fifth embodiment of the present invention, and is a cross-sectional view taken along the line E-E in FIG. 25B. [Figure 25F] FIG. 10 is a front view showing the rear barrel of a writing implement according to a fifth embodiment of the present invention. [Figure 25G] FIG. 10 is a rear view showing the rear barrel of a writing implement according to a fifth embodiment of the present invention. [Figure 26A] FIG. 22 is a perspective view showing the inner barrel of the writing instrument shown in FIG. 21. [Figure 26B] FIG. 22 is a front view showing the inner barrel of the writing instrument shown in FIG. 21. [Figure 26C] 22 is a right side view showing the inner barrel of the writing instrument shown in FIG. 21. FIG. [Figure 26D] 22 is a left side view showing the inner barrel of the writing instrument shown in FIG. 21. FIG. [Figure 26E] 26B shows the inner barrel of the writing implement shown in FIG. 21, and is a cross-sectional view taken along the line E-E in FIG. 26B. [Figure 26F] 26C, showing the inner barrel of the writing implement shown in FIG. 21. FIG. [Figure 26G] 26C, showing the inner barrel of the writing implement shown in FIG. 21. FIG. [Figure 26H] 26C, showing the inner barrel of the writing implement shown in FIG. 21. FIG. [Figure 27A] 22 is a perspective view showing a clip member of the writing implement shown in FIG. 21. FIG. [Figure 27B] 22 is a front view showing the clip member of the writing implement shown in FIG. 21. FIG. [Figure 27C] 22 is a side view showing the clip member of the writing implement shown in FIG. 21. FIG. [Figure 28A] FIG. 13 is a perspective view (part 1) illustrating a method for attaching a clip member to an inner tube and attaching the inner tube to a rear barrel in a writing instrument according to a fifth embodiment of the present invention. [Figure 28B] FIG. 28B is a side view corresponding to FIG. 28A. [Figure 29A] FIG. 13 is a perspective view (part 2) illustrating a method for attaching the clip member to the inner tube and attaching the inner tube to the rear barrel in the writing instrument of the fifth embodiment of the present invention. [Figure 29B] FIG. 29B is a side view corresponding to FIG. 29A. [Figure 30A] FIG. 13 is a perspective view (part 3) illustrating a method for attaching the clip member to the inner tube and attaching the inner tube to the rear barrel in the writing instrument of the fifth embodiment of the present invention. [Figure 30B] FIG. 30B is a side view corresponding to FIG. 30A. [Figure 31A] FIG. 13 is a fourth perspective view illustrating a method for attaching the clip member to the inner tube and attaching the inner tube to the rear barrel in the writing instrument of the fifth embodiment of the present invention. [Figure 31B] FIG. 31B is a side view corresponding to FIG. 31A. [Figure 32A]24, showing a state in which an inner tube with a clip member attached thereto is attached to a rear barrel in a writing instrument according to a fifth embodiment of the present invention, and a knock member and a rotor are attached. FIG. [Figure 32B] 32B is a cross-sectional view of FIG. 32A. [Figure 32C] FIG. 32C is an enlarged cross-sectional view of part C in FIG. 32B. [Figure 32D] 32B is a cross-sectional view taken along the line DD in FIG. 32A. DETAILED DESCRIPTION OF THE INVENTION

[0018] First Embodiment A writing instrument according to a first embodiment of the present invention will be described in detail below with reference to the drawings. In each embodiment, the side from which the tip of the refill protrudes and retracts is referred to as the tip side, front side, or front, and the side from which the knock part of the retraction mechanism extends is referred to as the rear side or rear. The axial direction of the writing instrument is also referred to as the longitudinal direction or axial direction.

[0019] 1 to 3 show a writing instrument according to a first embodiment of the present invention, with FIG. 1 being a perspective view, FIG. 2 being a front view, and FIG. 3 being a side view. Also, FIG. 4 is a cross-sectional view taken along the axial direction of the barrel of the writing instrument shown in FIG. 1. The writing instrument 1 according to this embodiment is a so-called knock-type ballpoint pen, and by pressing in the knock member 16 at the rear end, it is possible to switch between a state in which the brush tip 4a of the refill member 4 protrudes from the tip of the barrel 2 and a state in which the brush tip 4a of the refill member 4 is housed within the barrel 2.

[0020] As shown in Figures 1 to 4, writing instrument 1 of this embodiment includes a writing instrument body 7 and a clip member 8 held on the side of writing instrument body 7. Writing instrument body 7 includes a long, cylindrical barrel 2, a refill member 4 housed in barrel 2, and a retractable mechanism 6 provided at the rear end of barrel 2. Retractable mechanism 6 includes an inner barrel 10, a rotor 12, a spring member 14, and a knock member 16.

[0021] The barrel 2 is formed in a cylindrical shape with a tapered tip. A tip opening 2a is formed at the tip of the barrel 2, and a rear opening 2b is formed at the rear end. An annular protrusion 2c that protrudes radially inward around the entire circumference is formed on the inner surface of the rear end of the barrel 2. In addition, a notch 2d is formed on the edge of the rear end of the barrel 2, with a shape that corresponds to the clip attachment portion 10c of the inner barrel 10, which will be described later.

[0022] Figures 5A to 5E show the inner barrel of the writing instrument shown in Figure 1, with Figure 5A being a perspective view, Figure 5B being a front view, Figure 5C being a right side view, Figure 5D being a left side view, Figure 5E being an E-E cross-sectional view of Figure 5B, and Figure 5F being an F-F cross-sectional view of Figure 5C. As shown in Figures 5A to 5F, inner barrel 10 comprises a cylindrical main body portion 10a, a rear end portion 10b connected to the rear end of main body portion 10a, and a clip attachment portion 10c connected to the rear end of main body portion 10a. Main body portion 10a, rear end portion 10b, and clip attachment portion 10c are integrally molded.

[0023] The main body 10a is generally cylindrical, and its outer diameter is slightly smaller than the inner diameter of the barrel 2. A protrusion 10d, which protrudes radially outward along the entire circumference, is formed on the outer surface of the lower portion of the main body 10a. A cam portion 10f is also formed on the inner peripheral surface of the rear end of the main body 10a. The cam portion 10f cooperates with the cam portion 12b of the rotor 12 to press the knock member 16, thereby rotating the rotor 12 and switching between a state in which the brush tip portion 4a of the refill member 4 protrudes from the tip opening 2a of the barrel 2 and a state in which the brush tip portion 4a is housed within the barrel 2. The cam portion 10f of the inner barrel 10 and the cam portion 12b of the rotor 12 may be configured in a known manner. In this embodiment, the cam portion 10f of the inner barrel 10 has a protrusion extending forward and a recess formed between the protrusion and extending rearward.

[0024] The rear end portion 10b is formed in an annular shape, and the outer diameter is approximately equal to the outer diameter of the barrel 2. A circular through-hole penetrating in the front-rear direction is formed in the rear end portion 10b.

[0025] The clip attachment portion 10c is provided at a predetermined distance from the rear end of the main body portion 10a and is formed in a columnar shape extending laterally. Both side surfaces of the clip attachment portion 10c in the lateral direction (the left-right direction in FIG. 5B) are formed parallel to each other.

[0026] 5C, 5E, and 5F, a first mounting hole 10g extending laterally opens at the rear of the right side surface of the clip mounting portion 10c. The first mounting hole 10g terminates in the middle of the clip mounting portion 10c in the lateral direction and does not extend all the way to the left side surface.

[0027] 5D and 5E, a second mounting hole 10h extending laterally opens at the front of the left side surface of the clip mounting portion 10c. The second mounting hole 10h terminates in the middle of the clip mounting portion 10c in the horizontal direction and does not penetrate all the way to the right side surface. The first mounting hole 10g and the second mounting hole 10h are aligned in the longitudinal direction (i.e., positioned equidistant from the center axis of the inner cylinder 10), and the first mounting hole 10g is formed further rearward than the second mounting hole 10h.

[0028] The rotor 12 has a base end portion 12a on the rear side and a cam portion 12b on the front side. The base end portion 12a is formed in a cylindrical shape, and its outer diameter is smaller than the inner diameter of the knock member 16. The cam portion 12b is formed in a cylindrical shape, and its outer diameter is slightly smaller than the inner diameter of the main body portion 10a of the inner cylinder 10. The outer surface of the cam portion 12b has a protrusion extending rearward and a recess formed between the protrusions and extending forward.

[0029] The knock member 16 is formed in a cylindrical shape that is closed at the top and open at the bottom. The outer diameter of the knock member 16 is approximately equal to the inner diameter of the through hole in the rear end 10b of the inner cylinder 10. In addition, a protrusion 16a that protrudes radially outward is formed on the lower end of the outer circumferential surface of the knock member 16.

[0030] The rear end of the spring member 14 abuts against the tip end of the refill member 4, and the tip end abuts against the tip end of the barrel 2. As a result, the spring member 14 urges the refill member 4 rearward.

[0031] In the assembled state, the main body 10a of the inner tube 10 is inserted through the rear end opening 2b of the barrel 2 and positioned inside the barrel 2, with the rear end 10b abutting the rear edge of the barrel 2. The protruding portion 10d of the inner tube 10 is positioned closer to the front end than the convex portion 2c of the barrel 2, thereby securing the inner tube 10 to the barrel 2. The knock member 16 is inserted from the front into the through-hole in the rear end 10b of the inner tube 10, with the protruding portion 16a positioned inside the main body 10a of the inner tube 10. The base end 12a of the rotor 12 is inserted from the front into the knock member 16, with the front edge of the knock member 16 abutting against the rear end surface of the cam portion 12b of the rotor 12. The front end surface of the cam portion 12b of the rotor 12 abuts against the refill member 4. This biases the rotor 12 and the knock member 16 rearward via the refill member 4.

[0032] By pushing the knock member 16 in this state, the rotor 12 rotates, and the state switches between a state in which the convex portion of the cam portion 12b of the rotor 12 fits into the concave portion of the cam portion 10f of the inner tube 10 and a state in which the tip of the convex portion of the cam portion 10f of the inner tube 10 abuts against the tip of the convex portion of the cam portion 12b of the rotor 12, thereby switching between a state in which the brush tip portion 4a of the refill member 4 is contained within the barrel 2 and a state in which it protrudes from the tip of the barrel 2.

[0033] 6A to 6C show the clip member of the writing instrument shown in FIG. 1, with FIG. 6A being a perspective view, FIG. 6B being a front view, and FIG. 6C being a side view. Note that FIG. 6C shows the clip member removed from the inner tube. As shown in FIGS. 6A to 6C, clip member 8 is formed by bending a single metal wire such as stainless steel. Clip member 8 has a front end 8A formed in a U-shape, a rear end 8C formed in a substantially rectangular shape, and an intermediate portion 8B between front end 8A and rear end 8C.

[0034] The tip portion 8A is composed of a front portion of a first vertical portion 8b, a front portion of a second vertical portion 8c, and an arc-shaped portion 8a connecting the front ends of the first vertical portion 8b and the second vertical portion 8c. The first vertical portion 8b extends rearward from the right end of the arc-shaped portion 8a (the right side in FIG. 6B). The second vertical portion 8c extends rearward from the left end of the arc-shaped portion 8a (the left side in FIG. 6B). The first vertical portion 8b extends rearward from the second end 8i of the intermediate portion 8B. The second vertical portion 8c extends beyond the intermediate portion 8B to the rear end 8C.

[0035] The rear end portion 8C is composed of a rear end portion of the second vertical portion 8c, a first horizontal portion 8d extending rightward (to the right in FIG. 6B) from the rear end portion of the second vertical portion 8c, a third vertical portion 8e extending forward from the right end portion of the first horizontal portion 8d (to the right in FIG. 6B), and a second horizontal portion 8f extending leftward (to the left in FIG. 6B) from the front end portion of the third vertical portion 8e. The second horizontal portion 8f is located rearward of the first end portion 8h. A fourth vertical portion 8g extends forward from the left end portion of the second horizontal portion 8f (to the left in FIG. 6B).

[0036] The middle portion 8B has a first end 8h extending leftward (leftward in FIG. 6B) from the rear end of the first vertical portion 8b, and a second end 8i extending rightward (rightward in FIG. 6B) from the front end of the fourth vertical portion 8g. The first end 8h is located rearward of the second end 8i.

[0037] When the clip member 8 is removed from the inner tube 10, the first vertical portion 8b is inclined rearward toward the center in the radial direction (to the right in FIG. 6C) relative to the direction in which the second vertical portion 8c extends. The third vertical portion 8e and the fourth vertical portion 8g are also inclined rearward toward the outside in the radial direction (to the left in FIG. 6C) relative to the direction in which the second vertical portion 8c extends. Therefore, the first end portion 8h is located closer to the writing instrument body than the second end portion 8i. The biasing force of the clip member 8 is sufficient as long as at least the first vertical portion 8b is inclined.

[0038] In the assembled state, the first mounting hole 10g and the second mounting hole 10h of the clip mounting portion 10c of the inner tube 10 are positioned so as to be spaced a predetermined distance from the outer surface of the barrel 2 and aligned in the longitudinal direction. The clip member 8 is fixed such that the first end 8h is inserted into the first mounting hole 10g of the clip mounting portion 10c of the inner tube 10 and the second end 8i is inserted into the second mounting hole 10h of the clip mounting portion 10c. The clip member 8 is attached in a deformed state so that the first vertical portion 8b, the third vertical portion 8e, and the fourth vertical portion 8g are approximately parallel to the second vertical portion 8c.

[0039] With this configuration, the middle portion 8B of the clip member 8 is held by the clip attachment portion 10c. As described above, the clip member 8 is attached in a deformed state, and therefore the elastic force of the metal wire that constitutes the clip member 8 urges the tip portion 8A toward the writing instrument body 7. As a result, as shown in FIG. 3, with the clip member 8 attached to the inner tube 10, the tip portion 8A of the clip member 8 abuts against the outer peripheral surface of the barrel 2 of the writing instrument body 7.

[0040] Fig. 7 is a side view showing the clip of the writing instrument according to the first embodiment of the present invention in an open state. As shown in Fig. 7, when rear end 8C of clip member 8 is pushed radially inward toward writing instrument body 7, clip member 8 rotates around middle portion 8B held by clip attachment portion 10c as a fulcrum, and tip end 8A of clip member 8 moves radially outward so as to move away from writing instrument body 7. Therefore, a user of writing instrument 1 of this embodiment can grasp barrel 2 of writing instrument body 7 with the index finger, middle finger, ring finger, and little finger of one hand and push rear end 8C of clip member 8 to move tip end 8A of clip member 8 away from writing instrument body 7, thereby opening clip member 8 and writing instrument body 7.

[0041] In the present invention, the rotation of the clip toward the writing instrument body does not only mean that the clip rotates strictly around one axis, but also includes that in which the rear of the clip member is pressed radially inward while the middle part of the clip part is supported, as in the above embodiment, causing the tip of the clip member to move radially outward.

[0042] According to this embodiment, the following effects are achieved. In this embodiment, the middle portion 8B of the clip member 8 is held on the side of the writing instrument body 7, and by pressing the rear end portion 8C of the clip member 8 toward the writing instrument body 7, the clip member 8 rotates so that the front end portion 8A of the clip member 8 moves away from the writing instrument body 7. Therefore, by pressing the rear end portion 8C of the clip member 8 while holding the barrel 2 of the writing instrument body 7 with the index finger, middle finger, ring finger, and little finger of one hand, the clip member 8 can be opened, allowing operation with one hand.

[0043] Furthermore, according to this embodiment, the tip portion 8A is biased toward the writing instrument body 7 due to the elasticity of the wire constituting the clip member 8, so that the clip member 8 can be constructed with a simple structure without using a biasing member such as a spring.

[0044] In this embodiment, a clip mounting portion 10c is provided on the inner tube 10, and the clip member 8 is attached to the clip mounting portion 10c, but this is not limited to this, and a clip mounting portion may be provided on the side of the barrel 2, and the clip member 8 may be attached.

[0045] In addition, in this embodiment, the first mounting hole 10g and the second mounting hole 10h are aligned in the longitudinal direction, and when the clip member 8 is removed from the inner tube 10, the first end 8h is located closer to the writing instrument body than the second end 8i, but the present invention is not limited to this. Even if the clip member 8 is formed flat, if the second mounting hole 10h on the brush tip side is formed closer to the writing instrument body 7 than the first mounting hole 10g, the tip of the clip member 8 can be biased toward the writing instrument body 7.

[0046] In addition, in this embodiment, the first mounting hole 10g and the second mounting hole 10h are provided to fix the first end 8h and the second end 8i of the clip member 8, but this is not limited to this, and a notch may also be formed.

[0047] In addition, although the present invention has been described in the present embodiment as being applied to a knock-type ballpoint pen, the writing implements to which the present invention can be applied are not limited to this. For example, the present invention can also be applied to knock-type mechanical pencils and writing implements that do not have a knock mechanism. It is also possible to attach a clip to the cap of a cap-type writing implement.

[0048] Second Embodiment A writing instrument according to a second embodiment of the present invention will be described in detail below with reference to the drawings. In the following description, the same components as those in the first embodiment will be given the same reference numerals and detailed description will be omitted.

[0049] 8 to 11 show a writing instrument according to a second embodiment of the present invention, with FIG. 8 being a perspective view, FIG. 9 being a front view, and FIG. 10 being a side view. FIG. 11 is a cross-sectional view taken along the axial direction of the barrel of the writing instrument shown in FIG. 8. The writing instrument according to this embodiment is a so-called knock-type ballpoint pen, and by pushing in the knock member 16 at the rear end, it can be switched between a state in which the brush tip 4a of the refill member 4 protrudes from the tip of the barrel 2 and a state in which the brush tip 4a of the refill member 4 is housed within the barrel 2. The writing instrument 101 of this embodiment differs from the first embodiment only in the configuration of the inner barrel 110 and the clip member 108, and the other configurations are the same as those of the first embodiment.

[0050] As shown in Figures 8 to 11, writing instrument 101 of this embodiment includes writing instrument body 107 and clip member 108 held on the side of writing instrument body 107. Writing instrument body 107 includes cylindrical barrel 2, refill member 4 housed in barrel 2, and retractable mechanism 106 provided at the rear end of barrel 2. Retractable mechanism 106 includes inner barrel 110, rotor 12, spring member 14, and knock member 16.

[0051] 12A to 12G show the inner barrel of the writing instrument shown in FIG. 8, with FIG. 12A being a perspective view, FIG. 12B being a front view, FIG. 12C being a right side view, and FIG. 12D being a left side view. Also, FIG. 12E is a cross-sectional view taken along line E-E of FIG. 12C, FIG. 12F is a cross-sectional view taken along line F-F of FIG. 12B, and FIG. 12G is a cross-sectional view taken along line G-G of FIG. 12C. As shown in FIGS. 12A to 12G, inner barrel 110 includes a cylindrical main body 110a, a rear end 110b connected to the rear end of main body 110a, and a clip attachment 110c connected to the rear end of main body 110a. Main body 110a, rear end 110b, and clip attachment 110c are integrally molded.

[0052] The main body 110a is substantially cylindrical, and the outer diameter of the main body 110a is slightly smaller than the inner diameter of the barrel 2. A cam portion 110f is formed on the inner peripheral surface of the rear end of the main body 110a. The cam portion 110f works in cooperation with the cam portion 12b of the rotor 12 to press the knock member 16, thereby rotating the rotor 12 and switching between a state in which the brush tip portion 4a of the refill member 4 protrudes from the tip opening 2a of the barrel 2 and a state in which it is housed within the barrel 2. Well-known configurations can be used for the configurations of the cam portion 110f of the inner barrel 110 and the cam portion 12b of the rotor 12.

[0053] The rear end portion 110b is formed in an annular shape, and its outer diameter is approximately equal to the outer diameter of the barrel 2. A circular through-hole penetrating in the front-rear direction is formed in the rear end portion 110b.

[0054] Clip attachment portion 110c is provided at a predetermined distance from the rear end of main body portion 110a and is formed in a columnar shape extending laterally. Both side surfaces of clip attachment portion 110c in the lateral direction (left-right direction in FIG. 12B) are formed parallel to each other.

[0055] A first mounting notch 110g is formed at the rear of the clip mounting portion 110c. The first mounting notch 110g is configured as a notch that extends from the radially outer end of the rear end of the clip mounting portion 110c (the upper and left end of the clip mounting portion 110c in FIG. 12C) toward the front (the lower side in FIG. 12C) and tilts radially inward (the right side in FIG. 12C). A cylindrical storage portion 110g1 is formed at the end of the first mounting notch 110g.

[0056] A second mounting hole 110h is formed in the front of the clip mounting portion 110c, penetrating laterally. The second mounting hole 110h has a base end 110h1 on the right side and a recess 110h2 on the left side. The base end 110h1 opens on the right side of the clip mounting portion 110c and is cylindrical. The recess 110h2 opens on the left side of the clip mounting portion 110c and is cylindrical with a diameter larger than that of the base end 110h1.

[0057] The accommodating portion 110g1 of the first mounting notch 110g and the second mounting hole 110h are aligned in the longitudinal direction (i.e., located equidistant from the central axis of the inner tube 110), and the first mounting notch 110g is formed rearward of the second mounting hole 110h.

[0058] The rotor 12, knock member 16, and spring member 14 have the same configurations as those in the first embodiment.

[0059] In the assembled state, the main body 110a of the inner tube 110 is inserted through the rear end opening 2b of the barrel 2 and positioned inside the inner tube 110, with the rear end 110b abutting the rear end edge of the barrel 2. The knock member 16 is inserted from the front into the through hole in the rear end 110b of the inner tube 110, with the protrusion 16a positioned inside the main body 10a of the inner tube 10. The rotor 12 has the base end 12a inserted into the knock member 16 from the front, with the leading edge of the knock member 16 abutting against the rear end surface of the cam portion 12b of the rotor 12. The leading end surface of the cam portion 12b of the rotor 12 abuts against the refill member 4. As a result, the rotor 12 and the knock member 16 are urged rearward via the refill member 4.

[0060] By pushing the knock member 16 in this state, the rotor 12 rotates, and the state switches between a state in which the convex portion of the cam portion 12b of the rotor 12 fits into the concave portion of the cam portion 110f of the inner tube 110 and a state in which the tip of the convex portion of the cam portion 110f of the inner tube 110 abuts against the tip of the convex portion of the cam portion 12b of the rotor 12, thereby switching between a state in which the brush tip portion 4a of the refill member 4 is contained within the barrel 2 and a state in which it protrudes from the tip of the barrel 2.

[0061] 13A to 13C show the clip member of the writing instrument shown in FIG. 8, with FIG. 13A being a perspective view, FIG. 13B being a front view, and FIG. 13C being a side view. It should be noted that FIGS. 13A to 13C show the clip member removed from the inner tube. As shown in FIGS. 13A to 13C, clip member 108 is formed by bending a single metal wire such as stainless steel. Clip member 108 has a U-shaped front end 108A, a U-shaped rear end 108C, and an intermediate portion 108B between front end 108A and rear end 108C.

[0062] The tip portion 108A is composed of a front portion of a first vertical portion 108b, a front portion of a second vertical portion 108c, and a first arcuate portion 108a connecting the front ends of the first vertical portion 108b and the second vertical portion 108c. The first vertical portion 108b extends rearward from the right end of the first arcuate portion 108a (the right side in FIG. 13B) to an intermediate portion 108B. The second vertical portion 108c extends rearward from the left end of the first arcuate portion 108a (the left side in FIG. 13B) beyond the intermediate portion 108B to a rear end portion 108C.

[0063] The rear end portion 108C is composed of the rear end portion of the second vertical portion 108c, a second arc-shaped portion 108d extending in an arc shape from the rear end portion of the second vertical portion 108c to the right side (right side in Figure 13B), and a third vertical portion 108e extending forward from the right end portion (right side in Figure 13B) of the second arc-shaped portion 108d.

[0064] The middle portion 108B has a first end 108f extending leftward (leftward in FIG. 13B) from the front end of the third vertical portion 108e, and a second end 108g extending leftward (leftward in FIG. 13B) from the rear end of the first vertical portion 108b. A bent portion 108h that slopes forward toward the left is formed at the tip of the second end 108g.

[0065] When the clip member 108 is removed from the inner tube 110, the first vertical portion 108b is inclined radially outward (to the left in FIG. 13C) toward the rear relative to the direction in which the second vertical portion 108c extends, so that the first end 108f is located closer to the writing instrument body than the second end 108g.

[0066] In the assembled state, the receiving portion 110g1 of the first mounting notch 110g of the clip mounting portion 110c of the inner tube 110 and the second mounting hole 110h are positioned to be spaced a predetermined distance from the outer surface of the barrel 2 and aligned in the longitudinal direction. The clip member 108 is fixed such that the first end 108f is inserted into the first mounting notch 110g of the clip mounting portion 110c of the inner tube 110 and the second end 108g is inserted into the second mounting hole 110h of the clip mounting portion 110c. At this time, the bent portion 108h at the tip of the second end 108g is positioned within the relief portion 110h2 of the second mounting hole 110h. The clip member 108 is attached in a deformed state such that the first vertical portion 108b is substantially parallel to the second vertical portion 108c.

[0067] As a result, middle portion 108B of clip member 108 is held by clip attachment portion 110c. As described above, clip member 108 is attached in a deformed state, and therefore tip portion 108A is urged toward writing instrument body 7 by the elastic force of the metal wire that constitutes clip member 108. As a result, as shown in FIG. 10 , with clip member 108 attached to inner tube 110, tip portion 108A of clip member 108 abuts against the outer peripheral surface of barrel 2 of writing instrument body 107.

[0068] When attaching the clip member 108, first, as shown in Figures 14A and 14B, the clip member 108 is inverted front to back and inside out (i.e., with the second end 108g positioned rearward of the first end 108f and closer to the writing instrument body 107), and the bent portion 108h of the second end 108g is inserted into the base end 110h1 of the second mounting hole 110h. The clip member 108 is then rotated around the second end 108g until the first arc-shaped portion 108a is positioned on the rear end side, and the second end 108g is inserted into the second mounting hole 110h so that the bent portion 108h is positioned within the recess 110h2.

[0069] 15A and 15B, first arcuate portion 108a is bent so that second vertical portion 108c and second arcuate portion 108d are positioned on the left side of writing instrument body 107. Then, as shown by the arrow in FIG. 15B, clip member 108 is rotated around second end 108g so that first arcuate portion 108a is positioned forward.

[0070] 16, the third vertical portion 108e and the first end portion 108f are inserted laterally into the first mounting notch 110g, and the first end portion 108f is placed in the housing portion 110g1. This allows the clip member 108 to be attached to the clip mounting portion 110c. Note that after the clip member 108 is attached with the first end portion 108f placed in the housing portion 110g1, it cannot be removed unless the clip member 108 or the inner cylinder 110 is destroyed.

[0071] Fig. 17 is a side view showing the clip of a writing instrument according to a second embodiment of the present invention in an open state. As shown in Fig. 17, when rear end 108C of clip member 108 is pushed radially inward toward writing instrument body 107, clip member 108 rotates about middle portion 108B held by clip attachment portion 110c as a fulcrum, and tip end 108A of clip member 108 moves radially outward so as to move away from writing instrument body 107. Therefore, a user of writing instrument 101 of this embodiment can grasp barrel 2 of writing instrument body 107 with the index finger, middle finger, ring finger, and little finger of one hand and push rear end 108C of clip member 108, thereby moving tip end 108A of clip member 108 away from writing instrument body 107 and opening clip member 108 and writing instrument body 107.

[0072] According to this embodiment, the following effects are achieved. In this embodiment, middle portion 108B of clip member 108 is held on the side of writing instrument body 107, and by pressing rear end portion 108C of clip member 108 toward writing instrument body 107, clip member 108 rotates so that front end portion 108A of clip member 108 moves away from writing instrument body 107. Therefore, by pressing rear end portion 108C of clip member 108 while holding barrel 2 of writing instrument body 107 with the index finger, middle finger, ring finger, and little finger of one hand, clip member 108 can be opened, allowing for one-handed operation.

[0073] Furthermore, according to this embodiment, the tip 108A is biased toward the writing instrument body 107 due to the elasticity of the wire constituting the clip member 108, so that the clip member 108 can be constructed with a simple structure without using a biasing member such as a spring.

[0074] Furthermore, according to this embodiment, the second mounting hole 110h is formed as a hole extending laterally, and the second mounting hole 110h has a recess 110h2, and the bent portion 108h of the second end portion 108g is disposed in the recess 110h2. In this manner, the bent portion 108h is formed in the second end portion 108g of the clip member 108, so that the clip member 108 can be prevented from coming off the second mounting hole 110h.

[0075] In this embodiment, the first mounting notch 110g is formed as a notch, and the second mounting hole 110h is formed as a hole extending in the horizontal direction, but this is not limited thereto, and the notch may be changed to a hole extending in the horizontal direction, or the hole extending in the horizontal direction may be changed to a notch. Also, in this embodiment, the bent portion 108h is formed at the second end 108g of the clip member 108, but this is not limited thereto, and a bent portion may be provided at the first end 108f.

[0076] In addition, in this embodiment, a clip mounting portion 110c is provided on the inner tube 110, and the clip member 108 is attached to the clip mounting portion 110c, but this is not limited to this, and a clip mounting portion may be provided on the side of the barrel 2, and the clip member 108 may be attached.

[0077] Furthermore, in this embodiment, first mounting notch 110g and second mounting hole 110h are aligned in the longitudinal direction, and when clip member 108 is removed from inner tube 110, first end 108f is positioned closer to the writing instrument body than second end 108g, but the present invention is not limited to this. Even if clip member 108 is formed flat, if second mounting hole 110h on the brush tip side is formed closer to writing instrument body 107 than first mounting notch 110g, the tip of clip member 108 can be biased toward writing instrument body 107.

[0078] In addition, although the present invention has been described in the present embodiment as being applied to a knock-type ballpoint pen, the writing implements to which the present invention can be applied are not limited to this. For example, the present invention can also be applied to knock-type mechanical pencils and writing implements that do not have a knock mechanism. It is also possible to attach a clip to the cap of a cap-type writing implement.

[0079] Third Embodiment A writing instrument according to a third embodiment of the present invention will be described in detail below with reference to the drawings. In the following description, the same components as those in the second embodiment will be given the same reference numerals and detailed description will be omitted.

[0080] Figure 18 is a perspective view showing a writing instrument according to a third embodiment of the present invention. As shown in Figure 18, writing instrument 201 of this embodiment includes writing instrument body 107 and clip member 208 held on the side of writing instrument body 107. Writing instrument 201 of this embodiment differs from the second embodiment only in the configuration of clip member 208, and the other configurations are the same as those of the second embodiment.

[0081] Figures 19A to 19C show the clip member of the writing implement shown in Figure 18, with Figure 19A being a perspective view, Figure 19B being a front view, and Figure 19C being a side view. Note that Figure 19C shows the clip member removed from the inner cylinder.

[0082] 19A to 19C, clip member 208 is formed by bending a single metal wire such as stainless steel. Clip member 208 has a U-shaped leading end 208A, a geometrically shaped rear end 208C, and an intermediate portion 208B between leading end 208A and rear end 208C.

[0083] The tip portion 208A is composed of a front portion of a first vertical portion 208b, a front portion of a second vertical portion 208c, and a first arcuate portion 208a connecting the front ends of the first vertical portion 208b and the second vertical portion 208c. The first vertical portion 208b extends rearward from the right end of the first arcuate portion 208a (the right side in FIG. 19B) to an intermediate portion 208B. The second vertical portion 208c extends rearward from the left end of the first arcuate portion 208a (the left side in FIG. 19B) beyond the intermediate portion 208B to a rear end portion 208C.

[0084] Rear end portion 208C is composed of a rear end portion of second vertical portion 208c, a graphic portion 208d formed in a graphic shape imitating a character such as an animal, and a third vertical portion 208e extending forward from the front end portion on the right side of graphic portion 208d (the right side in FIG. 19B). Note that the shape of graphic portion 208d is not limited to a character such as an animal, and may be a shape imitating a flower, letters, patterns, or the like.

[0085] The intermediate portion 208B has a first end 208f extending from the front end of the third vertical portion 208e toward the left side (left side in FIG. 19B) and a second end 208g extending from the rear end of the first vertical portion 208b toward the left side (left side in FIG. 19B).

[0086] When the clip member 208 is removed from the inner tube 110, the first vertical portion 208b is inclined radially outward (to the left in FIG. 19C) toward the rear relative to the direction in which the second vertical portion 208c extends. Therefore, the first end 208f is located closer to the writing instrument body than the second end 208g.

[0087] In the assembled state, the clip member 208 is fixed such that the first end 208f is inserted into the first mounting notch 110g of the clip mounting portion 110c of the inner cylinder 110, and the second end 208g is inserted into the second mounting hole 110h of the clip mounting portion 110c. The clip member 208 is attached in a deformed state such that the first vertical portion 208b is approximately parallel to the second vertical portion 208c.

[0088] As a result, middle portion 208B of clip member 208 is held by clip attachment portion 110c. Furthermore, as described above, clip member 208 is attached in a deformed state, and therefore tip portion 208A is urged toward writing instrument body 107 by the elastic force of the metal wire that constitutes clip member 208. As a result, as shown in FIG. 18 , with clip member 208 attached to inner tube 110, tip portion 108A of clip member 108 abuts against the outer peripheral surface of barrel 2 of writing instrument body 107.

[0089] In this embodiment as well, when rear end 208C of clip member 208 is pushed radially inward toward writing instrument body 107, it rotates around middle portion 208B held by clip attachment portion 110c as a fulcrum, and tip end 208A of clip member 208 moves radially outward so as to move away from writing instrument body 107. Therefore, a user of writing instrument 201 of this embodiment can grasp barrel 2 of writing instrument body 107 with the index finger, middle finger, ring finger, and little finger of one hand, and by pushing rear end 208C of clip member 208, tip end 208A of clip member 208 moves away from writing instrument body 107, thereby opening clip member 208 and writing instrument body 107.

[0090] According to this embodiment, the following effects are achieved in addition to the effects of the second embodiment. In this embodiment, the rear end portion 208C of the clip member 208 is formed with a figure portion 208d made by bending a wire, and therefore the clip member 208 can be given a design feature.

[0091] The structure for attaching clip member 208 to writing implement body 107 is not limited to the configuration of this embodiment, and may be configured similarly to the first and second embodiments. Also, in this embodiment, a figure is formed on rear end portion 208C, but this is not limiting, and the figure may be formed on front end portion 208A, etc.

[0092] In addition, in this embodiment, a clip mounting portion 110c is provided on the inner tube 110, and the clip member 108 is attached to the clip mounting portion 110c, but this is not limited to this, and a clip mounting portion may be provided on the side of the barrel 2, and the clip member 108 may be attached.

[0093] <Fourth embodiment> A writing instrument according to a fourth embodiment of the present invention will now be described in detail with reference to the drawings. Figures 20A to 20G show the inner barrel of a writing instrument according to a fourth embodiment, with Figure 20A being a perspective view, Figure 20B being a front view, Figure 20C being a right side view, and Figure 20D being a left side view. Also, Figure 20E is a cross-sectional view taken along line E-E of Figure 20C, Figure 20F is a cross-sectional view taken along line F-F of Figure 20B, and Figure 20G is a cross-sectional view taken along line G-G of Figure 20C. The writing instrument according to the fourth embodiment differs from the second embodiment only in the configuration of the inner barrel; otherwise, it is similar to the second embodiment. That is, the writing instrument according to this embodiment comprises a writing instrument body and a clip member 108 held on the side of the writing instrument body. The clip member attached to the inner barrel of this embodiment is the same as that of the second embodiment. The writing instrument body includes a barrel 2, a refill member 4 housed in the barrel 2, and a retractable mechanism provided at the rear end of the barrel 2, and the retractable mechanism is composed of an inner barrel 310, a rotor 12, a spring member 14, and a knock member 16. The inner barrel 310 is attached to the rear end of the barrel 2.

[0094] 20A to 20G, inner cylinder 310 includes cylindrical main body 310a, rear end 310b connected to the rear end of main body 310a, and clip attachment 310c connected to the rear end of main body 310a. Main body 310a, rear end 310b, and clip attachment 310c are integrally molded.

[0095] The main body 310a is substantially cylindrical, and the outer diameter of the main body 310a is slightly smaller than the inner diameter of the barrel 2. A cam portion 310f is formed on the inner peripheral surface of the rear end of the main body 310a. The cam portion 310f works in cooperation with the cam portion 12b of the rotor 12 to press the knock member 16, thereby rotating the rotor 12 and switching between a state in which the brush tip portion 4a of the refill member 4 protrudes from the tip opening 2a of the barrel 2 and a state in which it is housed within the barrel 2. Well-known configurations can be used for the configurations of the cam portion 310f of the inner barrel 310 and the cam portion 12b of the rotor 12.

[0096] The rear end portion 310b is formed in an annular shape, and its outer diameter is approximately equal to the outer diameter of the barrel 2. A circular through-hole penetrating in the front-rear direction is formed in the rear end portion 310b.

[0097] Clip attachment portion 310c is provided at a predetermined distance from the rear end of main body portion 310a and is formed in a columnar shape extending laterally. Both side surfaces of clip attachment portion 310c in the lateral direction (left-right direction in FIG. 20B) are formed parallel to each other.

[0098] A first mounting notch 310g is formed at the rear of clip mounting portion 310c. First mounting notch 310g is configured as a notch that first extends forward (to the bottom in FIG. 20C) from the radially inner end of the rear end of clip mounting portion 310c (the upper and right end of clip mounting portion 310c in FIG. 20C), bends, and then extends so as to slope radially outward (to the left in FIG. 20C) toward the front (to the bottom in FIG. 20C). A cylindrical storage portion 310g1 is formed at the end of first mounting notch 310g.

[0099] A second mounting hole 310h is formed in the front of the clip mounting portion 310c, penetrating laterally. The second mounting hole 310h has a base end 310h1 on the right side and a recess 310h2 on the left side. The base end 310h1 opens on the right side of the clip mounting portion 310c and is cylindrical. The recess 310h2 opens on the left side of the clip mounting portion 310c and is cylindrical with a diameter larger than that of the base end 310h1.

[0100] The accommodating portion 310g1 of the first mounting notch 310g and the second mounting hole 310h are aligned in the longitudinal direction (i.e., located equidistant from the central axis of the inner tube 310), and the first mounting notch 310g is formed rearward of the second mounting hole 310h.

[0101] In this embodiment, too, a first end 108f of a clip member 108 is inserted into a first mounting notch 310g of a clip mounting portion 310c of the inner tube 310, and a second end 108g of the clip member 108 is inserted into a second mounting hole 310h of the clip mounting portion 310c, thereby fixing the clip member 108 to the inner tube 310. At this time, a bent portion 108h at the tip of the second end 108g is positioned within a recess 310h2 of the second mounting hole 310h. The method of mounting the clip member 108 is the same as in the second embodiment.

[0102] According to this embodiment, when the clip member 108 is attached, the outer surface of the clip attachment portion 310c of the inner tube 310 to which the clip member 108 is attached is located on the outer diameter side, and the end of the first attachment notch 310g is not exposed, thereby improving the design.

[0103] In addition, although the present invention has been described in the present embodiment as being applied to a knock-type ballpoint pen, the writing implements to which the present invention can be applied are not limited to this. For example, the present invention can also be applied to knock-type mechanical pencils and writing implements that do not have a knock mechanism. It is also possible to attach a clip to the cap of a cap-type writing implement.

[0104] In the present invention, the rotation of the clip toward the writing instrument body does not only mean that the clip rotates strictly around one axis, but also includes that the tip of the clip member moves radially outward by pressing the rear of the clip member radially inward while the middle part of the clip part is supported, as in each of the above embodiments.

[0105] Fifth Embodiment A writing instrument according to a fifth embodiment of the present invention will now be described in detail with reference to the drawings.

[0106] 21 to 23 show a writing instrument according to a fifth embodiment of the present invention, with FIG. 21 being a perspective view, FIG. 22 being a front view, and FIG. 23 being a side view. Also, FIG. 24 is a cross-sectional view taken along the axial direction of the barrel of the writing instrument shown in FIG. 21. Writing instrument 401 according to this embodiment is a so-called Kern knock-type ballpoint pen, and by pressing knock member 416 at the rear end, it is possible to switch between a state in which tip portion 404a of refill member 404 protrudes from the tip of barrel 402 and a state in which tip portion 404a of refill member 404 is housed within barrel 402.

[0107] As shown in FIGS. 21 to 24, writing instrument 401 of this embodiment includes writing instrument body 407 and clip member 408 held on the side of writing instrument body 407. Clip member 408 is held by clip holder 418 formed on the rear side of writing instrument body 407. Writing instrument body 407 includes long, cylindrical barrel 402, refill member 404 housed in barrel 402, and retractable mechanism 406 provided at the rear end of barrel 402. Retractable mechanism 406 includes inner barrel 410, rotor 412, spring member 414, and knock member 416.

[0108] The barrel 402 is formed in a cylindrical shape with a tapered tip. The barrel 402 is formed by connecting a front barrel 402A on the tip side and a rear barrel 402B on the rear end side. Figures 25A to 25G show the rear barrel of a writing implement according to a fifth embodiment of the present invention, with Figure 25A being a perspective view, Figure 25B being a front view, Figure 25C being a side view, Figure 25D being a DD cross-sectional view of Figure 25C, Figure 25E being an EE cross-sectional view of Figure 25B, Figure 25F being a view from the front, and Figure 25G being a view from the rear. As shown in Figure 24, a thread 402A1 is formed on the outer peripheral surface of the rear end of the front barrel 402A. Furthermore, as shown in Figures 25A to 25G, a thread 402B1 is formed on the inner peripheral surface of the rear barrel 402B. The rear end of the front barrel 402A enters the inside of the rear barrel 402B from the front end side, and the threads 402A1 of the front barrel 402A thread into the threads 402B1 of the rear barrel 402B, thereby connecting the front barrel 402A and the rear barrel 402B to form the barrel 402. A front end opening 402a is formed at the front end of the front barrel 402A. Also, a rear end opening 402b is formed at the rear end of the rear barrel 402B.

[0109] A pair of reduced diameter portions 402c protruding radially inward are formed on the inner surface of the rear end portion of the rear barrel 402B. The reduced diameter portions 402c are formed in a rectangular shape when viewed from the radially inside, and an inclined surface is formed at the rear end portion. The pair of reduced diameter portions 402c are arranged at positions facing each other across the central axis.

[0110] In addition, a notch 402d having a shape corresponding to the extension 410b1 of the inner cylinder 410 (described later) is formed on the edge of the rear end of the rear barrel 402B. A first clip holding portion 402e is formed on the front end of the notch 402d. The first clip holding portion 402e includes a base portion 402e1 erected on the outer peripheral surface of the rear barrel 402B and an engagement portion 402e2 connected to the base portion 402e1. The radially outer surface of the base portion 402e1 is flat. The rear surface of the base portion 402e1 is inclined radially outward and forward. A recess 402e3 is formed on the radially outer surface of the base portion 402e1, extending from one lateral edge to the middle position in the width direction. The engagement portion 402e2 is erected at the front end of the radially outer surface of the base portion 402e1. The radially outer surface of the engaging portion 402e2 is formed flat, and the rear end portion of the engaging portion 402e2 is inclined forward and radially inward.

[0111] 26A-26H show the inner barrel of the writing instrument shown in FIG. 21, with FIG. 26A being a perspective view, FIG. 26B being a front view, FIG. 26C being a right side view, FIG. 26D being a left side view, FIG. 26E being an E-E cross-sectional view of FIG. 26B, FIG. 26F being an F-F cross-sectional view of FIG. 26C, FIG. 26G being a G-G cross-sectional view of FIG. 26C, and FIG. 26H being an H-H cross-sectional view of FIG. 26C. As shown in FIGS. 26A-26H, inner barrel 410 includes a cylindrical main body portion 410a, a rear end portion 410b connected to the rear end of main body portion 410a, and a second clip holder 410c connected to the rear end of main body portion 410a. Main body portion 410a, rear end portion 410b, and second clip holder 410c are integrally molded.

[0112] The main body 410a is generally cylindrical, and the outer diameter of the main body 410a is slightly smaller than the inner diameter of the barrel 402. A recess 410d is formed on the front side of the main body 410a, recessed radially inward, and the periphery of the recess 410d is formed as a step. A base 410e1 is formed along the front edge of the recess 410d, and an elastically deforming portion 410e2 extends rearward from the base 410e1. The inner peripheral surface of the base 410e1 has the same cylindrical surface shape as the inner peripheral surface of the main body 410a, and the outer peripheral surface of the base 410e1 has a cylindrical surface with a smaller diameter than the main body 410a. The elastically deforming portion 410e2 has the same cylindrical surface shape as the base 410e1 and is formed in a cantilever shape extending rearward from the rear edge of the base 410e1. A protrusion 410e3 that protrudes radially outward is formed at the tip of the base 410e1. The rear and both circumferential sides of the base 410e1 are surrounded by through holes 410e4.

[0113] Furthermore, a cam portion 410f (FIG. 26E) is formed on the inner peripheral surface of the rear end portion of the main body portion 410a. The cam portion 410f cooperates with the cam portion 412b of the rotor 412 to press the knock member 416, thereby rotating the rotor 412 and switching between a state in which the brush tip portion 404a of the refill member 404 protrudes from the tip opening 402a of the barrel 402 and a state in which the brush tip portion 404a is housed within the barrel 402. The cam portion 410f of the inner barrel 410 and the cam portion 412b of the rotor 412 may be configured in a known manner. In this embodiment, the cam portion 410f of the inner barrel 410 has a convex portion extending forward and a concave portion formed between the convex portion and extending rearward.

[0114] The rear end portion 410b is formed in an annular shape, and its outer diameter is approximately equal to that of the barrel 402. A circular through-hole penetrating the rear end portion 410b in the front-to-rear direction is formed in the rear end portion 410b. The rear end portion 410b also includes an extension portion 410b1 that extends forward along the outer circumferential surface of the main body portion 410a.

[0115] Second clip holding portion 410c is provided continuously with the front end portion of extension portion 410b1 and is formed in a columnar shape extending laterally. Both side surfaces of second clip holding portion 410c in the lateral direction (left-right direction in FIG. 26B) are formed parallel to each other.

[0116] The second clip holding portion 410c has a standing portion 410c1 extending radially outward from the main body 410a and an extending portion 410c2 extending continuously from the radially outer tip of the standing portion 410c1. The front surface of the standing portion 410c1 is inclined forward and radially outward. A protruding portion 410c3 protruding radially inward is formed in a portion of the extending portion 410c2 forward of the standing portion 410c1. A first recess 410g is formed between the standing portion 410c1 and the protruding portion 410c3, at a front corner of the connection between the standing portion 410c1 and the extending portion 410c2. A second recess 410h is formed in a rear corner of the connection between the standing portion 410c1 and the extending portion 410c2. The front surface of the protruding portion 410c3 is inclined rearward and radially outward.

[0117] The first recess 410g is open radially inward and penetrates laterally (left and right in FIG. 26B). The first recess 410g has a semicircular cross section at its radially outer side (bottom) and a rectangular cross section at its radially inner side, resulting in a U-shaped cross section overall. The first recess 410g has a larger diameter at one side (the right side in FIG. 26F) of the first recess 410g, forming a relief portion. The second recess 410h is open rearward and penetrates laterally.

[0118] Rotor 412 has a base end portion 412a on the rear side and a cam portion 412b on the front side. Base end portion 412a is formed in a cylindrical shape, and its outer diameter is smaller than the inner diameter of knock member 416. Cam portion 412b is formed in a cylindrical shape, and its outer diameter is slightly smaller than the inner diameter of main body portion 410a of inner cylinder 410. The outer surface of cam portion 412b has a protrusion extending rearward and a recess formed between the protrusions and extending forward.

[0119] Knock member 416 is formed in a cylindrical shape that is closed at the top and open at the bottom. The outer diameter of knock member 416 is approximately equal to the inner diameter of the through hole in rear end 410b of inner cylinder 410. In addition, a protrusion 416a that protrudes radially outward is formed on the lower end of the outer circumferential surface of knock member 416.

[0120] The rear end of the spring member 414 abuts against the front end of the refill member 404, and the front end abuts against the front end of the barrel 402. As a result, the spring member 414 urges the refill member 404 rearward.

[0121] In the assembled state, the inner tube 410 is disposed so that the main body 410a is inserted through the rear end opening 402b of the barrel 402 and is positioned inside the barrel 402, and the rear end 410b abuts against the rear end edge of the barrel 402. The knock member 416 is inserted from the front into a through hole in the rear end 410b of the inner tube 410 and protrudes rearward from the inner tube 410, with the protrusion 416a positioned inside the main body 410a of the inner tube 410. The rotor 412 has the base end 412a inserted from the front into the knock member 416, and the leading edge of the knock member 416 abuts against the rear end surface of the cam portion 412b of the rotor 412. The leading end surface of the cam portion 412b of the rotor 412 abuts against the refill member 404. As a result, the rotor 412 and the knock member 416 are urged rearward via the refill member 404.

[0122] By pushing the knock member 416 in this state, the rotor 412 rotates, and the state switches between a state in which the convex portion of the cam portion 412b of the rotor 412 fits into the concave portion of the cam portion 410f of the inner tube 410 and a state in which the tip of the convex portion of the cam portion 410f of the inner tube 410 abuts against the tip of the convex portion of the cam portion 412b of the rotor 412, thereby switching between a state in which the brush tip portion 404a of the refill member 404 is contained within the barrel tube 402 and a state in which it protrudes from the tip of the barrel tube 402.

[0123] 27A to 27C show the clip member of the writing implement shown in FIG. 21, with FIG. 27A being a perspective view, FIG. 27B being a front view, and FIG. 27C being a side view. It should be noted that FIGS. 27A to 27C show the clip member removed from the inner tube. As shown in FIGS. 27A to 27C, clip member 408 is formed by bending a single metal wire such as stainless steel. Clip member 408 has a U-shaped front end 408A, a U-shaped rear end 408C, and an intermediate portion 408B between front end 408A and rear end 408C.

[0124] The tip portion 408A is composed of a front portion of a first vertical portion 408b, a front portion of a second vertical portion 408c, and a first arcuate portion 408a connecting the front ends of the first vertical portion 408b and the second vertical portion 408c. The first vertical portion 408b extends rearward from the right end (right side in FIG. 27B) of the first arcuate portion 408a to an intermediate portion 408B. The second vertical portion 408c extends rearward from the left end (left side in FIG. 27B) of the first arcuate portion 408a, past the intermediate portion 408B, to a rear end portion 408C.

[0125] The rear end portion 408C is composed of the rear end portion of the second vertical portion 408c, a second arc-shaped portion 408d extending in an arc shape from the rear end portion of the second vertical portion 408c to the right side (right side in Figure 27B), and a third vertical portion 408e extending forward from the right end portion (right side in Figure 27B) of the second arc-shaped portion 408d.

[0126] The middle portion 408B has a first end 408f extending leftward (leftward in FIG. 27B) from the front end of the third vertical portion 408e, and a second end 408g extending leftward (leftward in FIG. 27B) from the rear end of the first vertical portion 408b. A bent portion 408h that slopes forward toward the left is formed at the tip of the second end 408g.

[0127] When clip member 408 is removed from inner tube 410, first vertical portion 408b is inclined radially outward (to the left in FIG. 27C) toward the rear relative to the direction in which second vertical portion 408c extends, so that first end 408f is located closer to the writing instrument body than second end 408g.

[0128] When assembling the writing instrument of this embodiment, first, the clip member is attached to the inner tube. Figures 28A to 31A are perspective views illustrating a method for attaching the clip member to the inner tube in the writing instrument of the fifth embodiment of the present invention and attaching the inner tube to the rear barrel. Figures 28B to 31B are side views corresponding to Figures 28A to 31A, respectively.

[0129] As shown in Figures 28A and 28B, to attach the clip member 408 to the inner tube 410, first, the clip member 408 is moved forward as shown by the arrow in the figure, and the first end 408f is inserted into the second recess 410h from the rear.

[0130] 29A and 29B, the second end 408g of the clip member 408 is pressed radially inward toward the inner cylinder 410. Then, the second end 408g is fitted into the first recess 410g from the radially inner side, so that the bent portion 408h is positioned in the expanded diameter portion of the first recess 410g.

[0131] 30A and 30B, the inner tube 410 is moved forward as shown by the arrow in the figure and inserted into the rear end opening 402b of the rear barrel 402B so that the extending portion 410b1 of the inner tube 410 fits into the notch 402d of the rear barrel 402B. By positioning the inner tube 410 so that the extending portion 410b1 fits into the notch 402d of the rear barrel 402B in this way, the recess 410d of the inner tube 410 is aligned in the axial direction with the reduced diameter portion 402c of the rear barrel 402B.

[0132] 31A and 31B, when the rear end 408C of the clip member 408 is pushed radially inward toward the rear barrel 402B, the clip member 408 rotates around the middle portion 408B held by the second clip holder 410c as a fulcrum, and the front end 408A of the clip member 408 moves radially outward away from the rear barrel 402B. When the inner barrel 410 is inserted forward in this state, the rear portion of the reduced-diameter portion 402c is formed as an inclined surface, allowing the front edge of the inner barrel 410 to climb over the reduced-diameter portion 402c. The inner barrel 410 is inserted until the inclined surface on the front side of the upright portion 410c1 of the second clip holder 410c of the inner barrel 410 abuts against the inclined surface on the rear side of the base portion 402e1 of the rear barrel 402B. As a result, the reduced diameter portion 402c of the rear barrel 402B fits into the recess 410d of the inner barrel 410. As a result, even if a pulling force acts on the inner barrel 410 toward the rear of the rear barrel 402B, the front edge of the reduced diameter portion 402c of the rear barrel 402B abuts against the step on the front edge of the recess 410d of the inner barrel 410, preventing the inner barrel 410 from separating from the rear barrel 402B. Furthermore, the radial inner surface of the reduced diameter portion 402c of the rear barrel 402B abuts against the protrusion 410e3 formed on the elastic deformation portion 410e2, causing the elastic deformation portion 410e2 to bend radially inward. As a result, the inner edge of the rear end of the elastic deformation portion 410e2 protrudes inward beyond the outer diameter of the cam portion 412b of the rotor 412.

[0133] Furthermore, the front inclined surface of the upright portion 410c1 of the inner tube 410 abuts against the rear inclined surface of the base portion 402e1 of the rear barrel 402B, whereby the first clip retaining portion 402e of the rear barrel 402B and the second clip retaining portion 410c of the inner tube 410 form a clip retaining portion 418 extending laterally from the writing instrument body 407. The first recess 410g of the inner tube 410 and the recess 402e3 of the rear barrel 402B together form a through-hole 420. One end of this through-hole 420 has a larger diameter than the other base end. A second end 408g is positioned within the through-hole 420, and a bent portion 408h is positioned in the larger-diameter relief portion of the through-hole 420. This allows the second end 408g of the clip member 408 to be held within the through-hole 420. In this way, the clip member 408 is fixed by attaching the first end 408f to the second recess 410h of the inner cylinder 410 and the second end 408g to the through-hole 420. That is, the second recess 410h and the through-hole 420 of the inner cylinder 410 that constitute the clip holding portion 418 function as an attachment portion. The through-hole 420 (attachment portion) formed in this way is formed at the boundary surface between the second clip holding portion 410c of the inner cylinder 410 and the first clip holding portion 402e of the rear barrel 402B.

[0134] Then, after attaching inner tube 410 to rear barrel 402B, knock member 416 is inserted into rear barrel 402B from the front of rear barrel 402B, and rotor 412 is further inserted into rear barrel 402B from the front of rear barrel 402B. Figures 32A to 32D show a state in which the inner tube with the clip member attached is attached to the rear barrel and the knock member and rotor are attached in a writing instrument according to a fifth embodiment of the present invention. Figure 32A is a cross-sectional view corresponding to Figure 24, Figure 32B is a cross-sectional view taken along line BB in Figure 32A, Figure 32C is an enlarged cross-sectional view of portion C in Figure 32B, and Figure 32D is a cross-sectional view taken along line DD in Figure 32A. As shown in Figures 32A to 32D, elastically deforming portion 410e2 extends rearward from base portion 410e1, so that rotor 412 can be smoothly inserted even if elastically deforming portion 410e2 protrudes radially inward. Once rotor 412 has been inserted all the way to the rear, overcoming elastic deformation portion 410e2, even if an attempt is made to move rotor 412 forward, the rear edge of elastic deformation portion 410e2 protrudes inward from the outer diameter of rotor 412, causing the outer peripheral edge of cam portion 412b at the front of rotor 412 to abut against the rear end face of elastic deformation portion 410e2. Therefore, even if writing instrument 401 is disassembled, such as when replacing refill 4, rotor 412 is held within rear barrel 402B by elastic deformation portion 410e2.

[0135] Next, spring member 414 is placed at the tip end of front barrel 402A, and with refill member 404 placed so that its tip end is inserted inside spring member 414, front barrel 402A and rear barrel 402B are screwed together. As a result, spring member 414 urges refill member 404 rearward and makes contact with the front end surface of rotor 412. Then, knock member 416 is urged rearward via rotor 412, and protrusion 416a of knock member 416 makes contact with the front edge of rear end portion 410b of inner barrel 410. This completes the assembly of writing instrument 401.

[0136] In the assembled state, when rear end 408C of clip member 408 is pushed radially inward toward writing instrument body 407, it rotates about middle portion 408B held by second clip holding portion 410c as a fulcrum, and tip end 408A of clip member 408 moves radially outward so as to move away from writing instrument body 407. Therefore, a user of writing instrument 401 of this embodiment can grasp barrel 402 of writing instrument body 407 with the index finger, middle finger, ring finger, and little finger of one hand, and by pushing rear end 408C of clip member 408, tip end 408A of clip member 408 moves away from writing instrument body 407, thereby opening clip member 408 and writing instrument body 407.

[0137] In the present invention, the rotation of the clip toward the writing instrument body does not only mean that the clip rotates strictly around one axis, but also includes that in which the rear of the clip member is pressed radially inward while the middle part of the clip part is supported, as in the above embodiment, causing the tip of the clip member to move radially outward.

[0138] According to this embodiment, the following effects are achieved. In this embodiment, middle portion 408B of clip member 408 is held on the side of writing instrument body 407, and by pressing rear end portion 408C of clip member 408 toward writing instrument body 407, clip member 408 rotates so that front end portion 408A of clip member 408 moves away from writing instrument body 407. Therefore, by pressing rear end portion 408C of clip member 408 while holding barrel 402 of writing instrument body 407 with the index finger, middle finger, ring finger, and little finger of one hand, clip member 408 can be opened, allowing operation with one hand.

[0139] Furthermore, according to this embodiment, the tip 408A is biased toward the writing instrument body 407 due to the elasticity of the wire constituting the clip member 408, so that the clip member 8 can be constructed with a simple structure without using a biasing member such as a spring.

[0140] Furthermore, according to this embodiment, through hole 420 is formed as a hole extending in the horizontal direction, and a recess is formed in through hole 420, and bent portion 408h of second end 408g is disposed in the recess. In this way, bent portion 408h is formed in second end 408g of clip member 408, so that clip member 408 can be prevented from coming off through hole 420.

[0141] Moreover, in this embodiment, the clip holding portion 418 has a through hole 420, the clip member 408 is made of a wire rod, and the portion made of the wire rod is disposed and held within the through hole 420, which is formed at the boundary surface between the barrel 2 and the inner tube 410. With this configuration, the clip member 408 is held by the through hole 420, which prevents the clip member 408 from easily coming off, and since the through hole 420 is disposed at the boundary surface between the barrel 2 and the inner tube 410, the clip member 408 can be easily disposed within the through hole 420.

[0142] Writing instrument 401 of this embodiment includes a cylindrical barrel 402, an inner barrel 410 disposed inside barrel 402, and a rotor 412 disposed inside inner barrel 410. Inner barrel 410 is formed with an elastic deformation portion 410e2 that is located closer to the tip of rotor 412 in an assembled state and that protrudes inward beyond the outer diameter of rotor 412 when disposed in barrel 402. With this configuration, when inner barrel 410 is disposed in barrel 402, elastic deformation portion 410e2 protrudes inward beyond the outer diameter of rotor 412. As a result, even when replacing refill 404, rotor 412 abuts against elastic deformation portion 410e2, preventing rotor 412 from coming off barrel 402.

[0143] In this embodiment, a reduced diameter portion 402c is formed on the inner peripheral surface of the barrel 402, and the elastic deformation portion 410e2 protrudes inward as the outer peripheral surface abuts against the reduced diameter portion 402c. With this configuration, the elastic deformation portion 410e2 can be made to protrude inward by disposing the inner barrel 410 inside the barrel 402, and separation of the rotor 412 can be prevented without complicating the configuration of the inner barrel 410.

[0144] In this embodiment, the inner tube 410 has a step on the periphery of the recess 410d on the outer circumferential surface, and when a pulling force acts on the inner tube 410 while the inner tube 410 is disposed inside the barrel 402, the step engages with the reduced diameter portion 402c and resists the pulling force. With this configuration, the step engages with the reduced diameter portion 402c, so the inner tube 410 can be fixed to the barrel 402.

[0145] In this embodiment, the elastic deformation portion 410e2 has a cantilever shape extending rearward. With this configuration, the elastic deformation portion 410e2 can be configured to protrude inward when the inner cylinder is placed inside the barrel with a simple configuration.

[0146] Furthermore, in this embodiment, writing implement 401 has clip member 408 provided along barrel 402, and barrel 402 and inner barrel 410 form clip holding portion 418 that holds clip member 408. With this configuration, attachment of clip member 408 can be easily performed.

[0147] Moreover, in this embodiment, the clip holding portion 418 has a through hole 420, the clip member 408 is made of a wire rod, and the portion made of the wire rod is disposed and held within the through hole 420, which is formed at the boundary surface between the barrel 2 and the inner tube 410. With this configuration, the clip member 408 is held by the through hole 420, which prevents the clip member 408 from easily coming off, and since the through hole 420 is disposed at the boundary surface between the barrel 2 and the inner tube 410, the clip member 408 can be easily disposed within the through hole 420.

[0148] In this embodiment, through-hole 420 and second recess 410h are aligned in the longitudinal direction, and first end 408f is positioned closer to the writing instrument body than second end 408i when clip member 408 is removed from inner tube 410, but the present invention is not limited to this. Even if clip member 408 is formed flat, if second recess 410h on the brush tip side is formed closer to writing instrument body 407 than through-hole 420, the tip of clip member 408 can be biased toward writing instrument body 407.

[0149] In addition, in this embodiment, a through hole 420 and a second recess 410h are provided to fix the first end 408h and the second end 408i of the clip member 408, but this is not limited to this, and a notch may also be formed.

[0150] In addition, although the present invention has been described in the present embodiment as being applied to a knock-type ballpoint pen, the writing implements to which the present invention can be applied are not limited to this. For example, the present invention can also be applied to knock-type mechanical pencils and writing implements that do not have a knock mechanism. It is also possible to attach a clip to the cap of a cap-type writing implement. [Explanation of symbols]

[0151] 1 writing implements 2 shaft cylinder 2a Tip opening 2b Rear end opening 2c Convex part 2d Notch 4 Refill material 4a Tip of the brush 6 Appearance mechanism 7 Writing instrument body 8 Clip member 8A tip 8B Middle part 8C Rear end 8a Arc-shaped part 8b First vertical section 8c Second vertical section 8d First horizontal section 8e Third vertical section 8F Second horizontal section 8g Fourth vertical section 8h First end 8i Second end 10 Inner cylinder 10a Main body 10b Rear end 10c Clip attachment part 10d protrusion 10f Cam section 10g First mounting hole 10h Second mounting hole 12 rotor 12a Proximal end 12b Cam section 14 Spring member 16 Knock member 16a Protrusion 101 Writing instruments 106 Appearance mechanism 107 Writing instrument body 108 Clip member 108A Tip 108B Middle part 108C Rear end 108a first arc-shaped portion 108b First vertical section 108c Second vertical section 108d Second arcuate portion 108e Third vertical section 108f first end 108g second end 108h Bend part 110 Inner cylinder 110a Main body 110b Rear end 110c clip attachment 110f Cam part 110g First mounting notch 110g1 Storage area 110h Second mounting hole 110h1 Proximal end 110h2 Recess 116 Knock parts 201 Writing instruments 208 Clip member 208A Tip 208B Middle part 208C rear end 208a First arc-shaped portion 208b First vertical section 208c Second vertical section 208d Graphics Section 208e Third vertical section 208f First end 208g second end 310 Inner cylinder 310a Main body 310b rear end 310c clip attachment part 310f Cam part 310g First mounting notch 310g1 Storage area 310h Second mounting hole 310h1 Proximal end 310h2 Recess 401 Writing instruments 402 Shaft cylinder 402A Front shaft cylinder 402A1 Screw 402B rear shaft cylinder 402B1 Screw 402a Tip opening 402b Rear end opening 402c Reduced diameter section 402d Notch 402e First clip holding portion 402e1 Base part 402e2 Engagement part 402e3 Recess 404 Refill material 404a Brush tip 406 Appearance mechanism 407 Writing implement body 408 Clip member 408A Tip 408B Middle part 408C rear end 408a First arc-shaped portion 408b First vertical section 408c Second vertical section 408d Second arcuate section 408e Third vertical section 408f First end 408g second end 408h Bend part 410 Inner cylinder 410a Main body 410b Rear end 410b1 Extension 410c Second clip holder 410c1 Standing part 410c2 Extension 410c3 Protrusion 410d recess 410e1 base 410e2 Elastic deformation part 410e3 convex part 410e4 through hole 410f Cam part 410g First recess 410h Second recess 412 Rotor 412a proximal end 412b Cam part 414 Spring member 416 Knock parts 416a Protrusion 418 Clip holder 420 through hole

Claims

[Claim 1] A writing instrument comprising a writing instrument body extending in a longitudinal direction and a clip member made of a wire held on a side of the writing instrument body, an intermediate portion of the clip member in the longitudinal direction is held by a side portion of the writing instrument body; the clip member is biased toward the writing instrument body so that a portion of the clip member on the brush tip side abuts against the writing instrument body, By pressing the rear portion of the clip member toward the writing instrument body, the portion of the clip member on the tip side in the longitudinal direction rotates and moves away from the writing instrument body. The clip member is formed by bending the wire material, Both ends of the wire are attached to a pair of attachment portions formed on the sides of the writing implement body, The writing instrument body has a cylindrical barrel and an inner barrel disposed inside the barrel, One of the pair of mounting holes is a through hole, and one end of the clip member is disposed and held in the through hole, The through hole is formed on the boundary surface between the barrel and the inner cylinder. A writing instrument characterized by:

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