JP6940809B2 - Haunting writing tool - Google Patents

Description

In the present invention, a convex portion arranged on the side of a writing instrument main body having a pen tip at the tip is engaged with the outer body as the writing instrument main body moves back and forth by operation, so that the convex portion is engaged with the outer body from the tip opening of the outer body. A retractable writing instrument that locks the pen tip in and out, and engages the convex portion with an engaging portion formed in the inner portion of a clip formed so as to protrude from the side portion as a part of the exterior body. About what you do.

Conventionally, as a retractable writing instrument in which the pen tip is retracted from the tip of the exterior body by operation, a writing instrument using a cam mechanism has been known, and the writing instrument body is urged rearward by a repellent member such as a coil spring. The formed convex portion or the like is advanced against the repulsive force of the repellent member by a knock operation or the like, and is guided to a guide path such as a groove formed in the exterior body so that the pen tip is in a protruding state or an immersive state. It is known to use a feeding mechanism called a so-called heart cam mechanism that enables each to be formed, and since the convex part can move in the guide path only by operating the writing instrument body back and forth, operability It is excellent in.
For example, in the knock-type writing tool (appearance-type writing tool) described in Japanese Patent Application Laid-Open No. 10-264581 (Patent Document 1), a knock operation of a knock portion provided with a locking claw and a return spring for repelling the ink storage tube rearward are used. The locking claw is locked to the locking portion of the clip facing through the window hole of the shaft tube (exterior body) and the locked state is released, and the locked state is released by flipping up the clip. Knock-type writing tools performed by.

Japanese Unexamined Patent Publication No. 10-264581

However, in the knock-type writing tool (appearance-type writing tool) described in Patent Document 1, the locked state is released by the flip-up operation of the clip, and therefore, an excessive pressing force is applied to the locking claw (convex portion) by the knock operation. When the clip is applied, the locking claw that is locked to the restricting part (forward movement restricting surface) that regulates the forward movement amount of the clip pushes up the clip, and the locking part and the locking claw are disengaged. As a result, there was a risk that the knock operation would not be performed correctly.

In the present invention, a convex portion arranged on the side of a writing tool main body having a pen tip at the tip is engaged with the outer body as the writing tool main body moves back and forth by operation, so that the convex portion is engaged with the outer body from the tip opening of the outer body. A retractable writing tool that locks the pen tip in and out, and engages the convex portion with an engaging portion formed in the inner portion of a clip formed so as to protrude from the side portion as a part of the exterior body. Of the forward movement restricting surface of the convex portion formed on the inner portion of the clip, the portion that comes into contact with the convex portion is made into a concave portion, and / or the convex portion is brought into contact with and pressed against the convex portion. The portion where the surface is adapted is used as the contact portion, and the lower portion in the outer direction of the clip from the concave portion protrudes from the concave portion toward the convex portion side, and / or the lower portion in the outer direction of the clip from the contact portion abuts. The gist is a haunting type writing tool that forms an overcoming regulation part that has a larger frictional resistance than the part.

Since the convex portion is in contact with and pressed against the upper portion of the front movement restricting surface in the outward direction of the clip, if the pressing force is strong, the convex portion will bite into the portion or be deformed so as to form a dent. In addition, at least the pressing force causes microscopic familiarity with the surface, creating a difference in frictional resistance with the non-contacting part, and the lower part of the forward movement regulation surface that does not contact the convex part is a jaw-shaped undercut. Alternatively, it is formed as a portion that is not familiar to the surface due to contact, and the convex portion moves over the forward movement restricting surface in the downward direction to unexpectedly disengage, or the operation cannot be engaged and the operation is missed. Can be suppressed as much as possible.

Vertical cross-sectional view showing the whole of this embodiment Longitudinal cross-sectional perspective view of the tip of the exterior body 1 Front view of the tip of the exterior body 1 in vertical section Rear enlarged perspective view of exterior body 1 Rear enlarged front view of exterior body 1 Perspective view of the writing tool body 2 Vertical cross-sectional front view of the writing tool body 2 Front view of pen tip 3 Vertical cross-sectional front view of the pen tip holder 15 Perspective view of the tip of the writing tool body 2 Perspective view of the rear part of the writing tool body 2 Front view of operating member 8 Front view of vertical cross section of operating member 8 The view from the front which is the direction in which the ink storage body 14 of the operation member 8 is inserted. Perspective view of the lid body 9 Side view of the lid body 9 Cross-sectional front view showing the inside of the lid body 9. Bottom view of the lid 9 Perspective view of the annular member 13 Longitudinal cross-sectional perspective view of the annular elastic body 12 Perspective view of clip 4 View from below of clip 4 Perspective view from below of clip 4 Perspective view of base 5 Side view of base 5 Longitudinal section of base 5 View from below of base 5 Perspective view of rotor 7 View from above of rotor 7 Side view of rotor 7 A perspective view of each part of this writing instrument Longitudinal cross-sectional front view of the front engaging projections 5a and the rear engaging projections 5b of the base portion 5 showing how the base portion 5 is fitted into the exterior body 1. A vertical cross-sectional view cut from the center of the base 5 showing how the base is fitted into the exterior body 1. Front view of the exterior body 1 with the base 5 arranged and viewed from the rear Front vertical cross-sectional front view of the writing instrument for explaining the rotation of the lid 9 and the forward movement of the writing instrument main body 2. Front vertical cross-sectional front view of the exterior body 1 and the annular elastic body 10 of the writing instrument for explaining the rotation of the lid 9 and the forward movement of the writing instrument main body 2. Stage of FIG. 35 (1) Front enlarged front view Stage of FIG. 35 (2) Front enlarged front view Stage of FIG. 35 (3) Front enlarged front view Stage of FIG. 35 (4) Front enlarged front view Stage of FIG. 35 (5) Front enlarged front view Stage of FIG. 35 (6) Front enlarged front view Front view showing the guideway of this writing instrument and viewed from above Partially enlarged front view of FIG. 43 The figure which shows the state that the convex part 7a of a rotor 7 moves forward. The figure which shows how the convex part 7a of a rotor 7 is guided by the 1st inclined wall 4d. The figure which shows after the convex part 7a of a rotor 7 is guided by the 2nd inclined wall 1o. The figure which shows the state that the convex part 7a of a rotor 7 was engaged with the engaging part 1p for projecting a pen tip. The figure which shows how the convex part 7a of a rotor 7 advances from the pen tip protrusion engaging part 1p, and is guided by the 3rd inclined wall 4e. The figure which shows after the convex part 7a of a rotor 7 is guided by the 3rd inclined wall 4e. The figure which shows how the convex part 7a of a rotor 7 recedes from the state of FIG. 50 and is guided by the 4th inclined wall 1q. An enlarged view of the periphery of the convex portion in the cross section taken along the line AA of FIG. 50.

The haunting type writing tool houses a writing tool body having a pen tip at the tip inside the exterior.
The exterior body is composed of one part or two or more parts such as a front shaft and a rear shaft, and an opening is formed at the tip in order to project the pen tip provided on the tip of the writing instrument body. A clip that hooks on the edge of the pocket to prevent it from falling off when pointing to the pocket on the side is provided.
As the pen tip provided on the tip of the writing instrument body, a pen tip for a ballpoint pen, a fiber convergent, a porous body such as urethane, a synthetic resin having communication holes, or the like can be appropriately used.
Various known methods can be adopted for the operation of moving the writing instrument body back and forth, such as providing a knock member arranged at the rear end of the infestation type writing instrument and providing a slide mechanism on the side portion.
The main body of the writing tool contains the coating liquid inside, and the method of storing the coating liquid is to impregnate the storage body such as a fiber converging body or to store the coating liquid directly in the coating body in a free state without using the storage body. You may. As the coating liquid used, a cosmetic coating liquid, ink for writing tools, and the like can be appropriately used. In the case of ink for writing instruments, a dye and / or a pigment can be used as a colorant, and water or an organic solvent can be appropriately used as the medium.
Further, the writing tool main body is arranged inside the exterior body so as to be able to move back and forth while being urged backward by a repellent member such as a coil spring.

The convex portion may be provided on the side portion of the writing tool main body, and means such as providing the convex portion directly on the side portion of the writing tool main body or arranging another member having the convex portion on the side portion of the writing tool main body can be appropriately selected. The convex portion is moved in the circumferential direction of the exterior body by the circumferentially inclined wall provided on the exterior body, which will be described later, and is moved back and forth by the inclined wall provided on the clip. Along with this, it moves in the circumferential direction of the exterior body, or it moves in the circumferential direction of the exterior body as the writing instrument body moves back and forth by both the circumferential inclined wall provided on the exterior body and the inclined wall provided on the clip. Therefore, when the convex portion is directly provided on the side portion of the writing tool main body, the writing instrument main body is arranged so as to be rotatable in the circumferential direction inside the exterior body, and another member having the convex portion is arranged on the side portion of the writing instrument main body. The other member may be arranged so as to be rotatable in the circumferential direction on the side portion of the writing tool main body.

The exterior body is formed with a guide path in which the convex portion on the side of the writing tool main body moves with the back-and-forth movement of the writing tool main body, and the pen tip is engaged with the convex portion in the guide path. An engaging portion for projecting the pen tip and an engaging portion for immersing the pen tip are formed, and the engaging portion for projecting the pen tip is immersed in the pen tip. It is provided on the front side of the engaging portion.
As the guide path, the convex portion on the side of the writing tool main body moves, for example, a slit provided on the exterior body, a wall member provided on the side facing the exterior body of a member attached to the side portion of the exterior body such as a clip, and the like. , Contact, and means of passage can be selected as appropriate. When the convex part of the writing tool body breaks the operation of advancing the writing tool body between the pen tip protruding engaging part and the pen tip immersive engaging part, the rear urging force of the repellent member causes the rear of the writing tool body. It retracts due to movement, and the rear side surface of the convex portion on the side of the writing instrument body and the convex portion provided behind the convex portion on the writing instrument body engage with each other, thereby restricting the backward movement of the writing instrument body and pen tip. The protruding state and the immersive state of the above are formed.

On the way from the engaging part for pen tip immersion to the engaging part for pen tip protrusion on the guide path, there is a radial guide inclined wall that guides the convex part in the radial direction of the exterior body, and the convex part is the exterior. A circumferential sloping wall that guides the body in the circumferential direction is provided. The radial guide inclined wall is a first inclined wall that guides the convex portion in the radial direction by abutting the front side surface of the convex portion by advancing the writing tool main body. Further, the circumferential inclined wall is a second inclined wall that guides the convex portion in the circumferential direction by abutting the front side surface or the rear side surface of the convex portion by advancing the writing tool main body.
Further, on the path of the guide path from the engaging portion for protruding the pen tip to the engaging portion for immersing the pen tip, the convex portion is a pen on a circumferentially inclined wall that guides the convex portion in the circumferential direction of the exterior body. It is provided behind the circumferentially sloping wall (second sloping wall) provided on the way from the pre-immersion engaging portion to the pen tip protruding engaging portion. The circumferential inclined wall is a third inclined wall in which the front side surface of the convex portion abuts and guides the convex portion in the circumferential direction by advancing the writing tool main body, and is formed by the second inclined wall and the third inclined wall. The guidance guides the convex portions in opposite directions.

At the end of the third inclined wall, a front regulating surface for restricting the forward movement of the convex portion is formed, and the convex portion is moved forward by the front regulating surface immediately after passing through the restricting wall. Movement is restricted. Then, after the forward operation of the writing tool main body is released, the writing tool main body moves backward by the rear urging force of the coil spring.
Here, the convex portion abuts on the upper portion of the forward movement restricting surface in the outer direction of the clip, and forms an overcoming restricting portion on the lower portion of the forward movement restricting surface.
For example, a pressing protrusion protruding forward from the front side surface of the convex portion is formed, and when the pressing protrusion abuts on the front regulation surface, the pressing protrusion abuts at a position separated upward from the lower end portion of the inclined wall. As a result, the front regulating surface of the clip is deformed by the pressing protrusion, and the pressing protrusion bites into the front regulating surface. If an excessive pressing force is unexpectedly applied, the connecting part of the clip with the outer body is fixed, so the outer body is attached to the tip of the clip in an attempt to release the forward force received from the convex part. Although a force that tries to push it upward from the top acts, it is difficult for the convex portion to get over the front regulation surface and a reliable knock operation can be performed because the pressing protrusion that bites into the clip is prevented from being pushed upward.
In addition, in order to bite into the front regulation surface, it is desirable that the hardness of the material of the protrusion is harder than that of the front regulation surface. Specifically, when the material of the member on which the convex portion is formed is polyacetal such as polyoxymethylene, the material of the member on which the front regulation surface is formed may be polypropylene, polyethylene, polycarbonate or the like.

Examples of the present invention will be described. In this embodiment, the pen tip direction of the writing instrument is forward, the opposite is backward, and the direction from the longitudinal axis of the writing instrument toward the clip arranged on the outer wall of the writing instrument is upward, and the direction toward the opposite axis. Will be described downward, and the line connecting the axis of the writing instrument and the clip and the direction of the perpendicular to the axis will be described as horizontal.
As shown in FIG. 1, a writing tool main body 2 having a pen tip 3 at its tip is housed inside the exterior body 1 so as to be movable back and forth. The tip of the exterior body 1 is provided with a tip opening 1a as a protrusion of the pen tip 3, and the rear end is a rear end opening of the operating member 8 for moving the writing instrument body 2 back and forth. Part 1b is provided. An annular elastic body 10 that comes into contact with the lid 9 is fitted and fixed to the inner surface of the tip opening 1a, and when the lid 8 is closed, the lid 9 and the annular elastic body 10 are circumferentially formed. It is in contact with the outside and blocks the ventilation from the outside.
Inside the exterior body 1, a coil spring 11 whose rear end is in contact with the shoulder portion 2c of the writing tool main body 2 is arranged, and the writing tool main body 2 is urged rearward. An annular elastic body 12 is fitted in the small diameter portion 2a of the writing tool main body 2, the front end portion of the coil spring 11 is in contact with the annular elastic body 12, and the lid 9 is urged forward via the annular member 13. doing. The annular elastic body 12 is in airtight contact with the inner wall of the exterior body 1 to form a rear sealed state of the space where the pen tip 3 exists, and the pen is closed by closing the tip opening 1a of the exterior body 1 of the lid body 9. The space where the nib 3 exists can be shielded from the outside air. A rotor 7, which is a ring having a convex portion 7a, is arranged on the writing tool main body 2 in a state where it can rotate around the circumference and is restricted from moving in the front-rear direction. Inside the writing tool main body 2, the ink occlusion body 14 is impregnated with ink and stored.
A clip 4 is arranged on the rear side surface of the exterior body 1 via a base 5 and a coil spring 6.

As shown in FIG. 2 which is a vertical cross-sectional perspective view of the tip portion of the exterior body 1 and FIG. 3 which is a vertical cross-sectional front view of the tip portion of the exterior body 1, the rear of the tip opening 1a is the front of the large diameter portion. A fixed portion 1G into which an annular elastic body 10 having a small diameter portion can be fitted is formed, and a bearing portion 1c extends rearward so as to face the inner side surface of the exterior body 1 behind the fixed portion 1G. The bearing portion 1c is provided with walls in front and above and below in order to regulate the movement of the rotating shaft 9c of the lid body 9. The distance between the walls (opening stopper 1h and closing stopper 1i) provided above and below the front wall (receiving surface 1d) needs to be a distance for the rotating shaft 9c to move up and down. Therefore, the bearing portion 1c has a concave shape that is long upward.
Further, the receiving surface 1d is formed with an open recess 1e and a closed recess 1f that are tapered so that the distance between the side surfaces of the exterior body 1 becomes smaller toward the front. A tapered surface connecting the opening recess 1e and the closing recess 1f is extended between the opening recess 1e and the closing recess 1f, and a central protrusion 1g extending rearward from the receiving surface 1d is formed. The top of the central protrusion 1g is in contact with the concave cam portion 9g formed on the rotation shaft 9c of the lid body 9, so that it has an R curved surface.
The opening recess 1e, the closing recess 1f, and the central protrusion 1g are portions (rack portions) corresponding to the teeth formed in the bearing portion 1c.
At both ends of the rack portion, an opening stopper contact wall 1h and a closing stopper contact wall 1i, which define the end points of the operation when the lid 9 is opened and closed, are in contact with each other. It is formed. The closing stopper contact wall 1i is formed longer behind the opening stopper contact wall 1h so as to face the side wall portion 13b of the annular member 13.
In the open recess 1e, when the lid 9 is in the open state, the open cam protrusion 9f formed on the rotation shaft 9c of the lid 9 comes into contact with the bottom of the open recess 1e, and the closed recess 1f has the lid 9. When in the closed state, the bottom of the closed cam projection 9d of the lid 9 comes into contact with the lid 9 to restrict the front of the lid 9. The rear part of the bearing portion 1c is an open portion without a wall, but this is because when the lid body 9 is arranged on the exterior body 1, the lid body 9 facilitates the insertion arrangement from the rear part. The rearward movement of the lid 9 is restricted by the contact surface 13c of the annular member 13 arranged behind the lid 9.

As shown in FIG. 4 which is a rear enlarged perspective view of the exterior body 1 and FIG. 5 which is a rear enlarged front view of the exterior body 1, the convex portion 7a of the rotor 7 is guided to the rear outer peripheral surface of the exterior body 1. A window hole 1k, which is a guide path, is formed. The window hole 1k is provided at the rear end of the exterior body 1 so that when the writing tool main body 2 is inserted through the rear end opening 1b of the exterior body 1, the convex portion 7a formed on the outer peripheral side surface of the rotor 7, which will be described later, can easily enter. It is formed from the opening 1b. The window hole 1k has a narrow portion 1 m in which the rear portion is slightly wider than the convex portion 7a of the rotor 7, and a wide portion 1n in the front portion which is wider on one side in the circumferential direction. A second inclined wall 1o is provided in front of the wide portion 1n of the window hole 1k. A pen tip protruding engaging portion 1p forming a protruding state from the tip opening 1a of the pen tip 3 is formed behind the side of the second inclined wall 1o on the side opposite to the narrow portion 1 m in the circumferential direction. ing. Since the second inclined wall 1o is inclined forward from the side where the narrow portion 1m is located to the side where the pen tip protruding engaging portion 1p is located, the convex portion 7a of the rotor 7 is displaced in the circumferential direction. I can guide you. A fourth inclined wall 1q is formed behind the wide portion 1n of the window hole 1k. Since the fourth inclined wall 1q is inclined rearward from the side with the pen tip protruding engaging portion 1p to the side with the narrow portion 1 m, the convex portion 7a of the rotor 7 is guided to shift in the circumferential direction. can do.
Further, behind the narrow portion 1m of the window hole 1k of the exterior body 1, a protrusion 1r having a further reduced width of the narrow portion 1m is formed so as to face each other. The protrusion 1r has a substantially trapezoidal shape including a step portion 1s and an inclined surface 1t whose rear side surface narrows the width of the window hole toward the front, and has a substantially trapezoidal shape. The convex portion 7a of the rotor 7 inserted from 1b easily passes through the rotor 7, and further regulates the rearward movement of the writing tool main body 2 urged rearward by the coil spring 10. Further, the protrusion 1r is a temporary holding when assembling the clip 4, and even if the protrusion 1r is damaged when using a writing instrument, the protrusion 4g provided at the base end portion 4a of the clip 4, which will be described later, is immediately behind. It becomes an engaging portion 1u for immersing the pen tip, and can suppress the rearward urging of the writing instrument main body 2.
In the window hole 1k, a guide path 1v having a pen tip protruding engaging portion 1p and a pen tip immersion engaging portion 1u is formed.
A base mounting portion 1w for mounting the base 5 from the rear end opening 1b of the exterior body 1 to the front is formed on the outer peripheral surface behind the protrusion 1r.
In this way, the exterior body 1 has a base mounting portion 1w to which a base for mounting the clip 4 is mounted and a base mounting portion to the rear of the sealed portion for accommodating the pen tip 3 in a state where ventilation from the outside is blocked in the front. It is composed of a guide path 1v formed in front of 1w. In the present invention, the exterior body 1 is composed of one component, but the exterior body 1 may be integrated by screwing or fitting and press-fitting a plurality of components according to moldability and assemblability. ..

The base mounting portion 1w is formed on both sides of the bridging portion 1A formed so as to bridge both edges of the outer peripheral surface having a substantially C-shaped cross section by the window hole 1k, and the top surface of the bridging portion 1A formed on both sides thereof. It is composed of an engaging portion 1B having a flat surface lowered by one step. By forming in this way, it is possible to suppress deformation of the rear part of the exterior body 1 having a substantially C-shaped cross section due to the window hole 1k formed from the rear end opening 1b of the exterior body 1.
Further, an engaging hole (front engaging hole 1C, rear engaging hole 1D) is formed in the engaging portion 1B in the base mounting portion 1w.
Blind wall 1E is formed on both side surfaces of the base mounting portion 1w so that the connecting portion with the base 5 cannot be seen from the side.
Further, on the outer peripheral surface of the exterior body 1, a protective wall 1F facing forward from the front end portion of the base mounting portion 1w along the window hole 1k is formed. It plays a role of protecting the convex portion 7a of the rotor 7 protruding from the outer peripheral surface of the exterior body 1 in the immersive state. Further, the front end surface of the protective wall 1F is inclined so that the height gradually decreases toward the front, so that it can be guided without being caught when a paper or the like is sandwiched between the clips when not in use.

The writing tool main body 2 is made of polypropylene having low gas permeation and good moldability, has a pen tip 3 at the tip, and has an ink occlusion body 14 inside.
As shown in FIG. 6 which is a perspective view of the writing instrument main body 2 and FIG. 7 which is a vertical sectional front view of the writing instrument main body 2, the writing instrument main body 2 has through holes having openings at the front and rear ends.
The outer shape of the writing tool main body 2 is formed with a small diameter portion 2a, a large diameter portion 2b, and a shoulder portion 2c between them. 2b houses the ink storage body 14.
The pen tip 3 shown in FIG. 8 which is a front view of the pen tip 3 includes a writing portion 3a and a connecting portion 3b for connecting to an ink storage body 14 having a diameter smaller than that of the writing portion 3a. The writing portion 3a is press-fitted and fixed to the pen tip holder 15, which will be described later, so that the pen tip 3 can write on the portion exposed from the tip of the pen tip holder 15.
The connecting portion 3b of the pen tip 3 is formed with a tapered portion 3d that tapers from a part of the rear toward the rear end, and extends to a part of the tapered portion 3d or a straight portion at the tip of the ink storage body 14. It is connected in a buried state so that ink can communicate with each other. By providing the tapered portion 3d in the connecting portion 3b, it becomes easy to connect to the ink storage body 14. By inserting the connection portion 3b into the ink storage body 14, the ink storage body 14 is pressed from the inside, and the fiber density of the pressed portion of the ink storage body 14 gradually increases, so that the ink storage body 14 is impregnated. Due to the capillary force, the ink is easily moved to the side having a higher fiber density, and the ink supply to the pen tip 3 is ensured.
As shown in FIG. 9, which is a vertical sectional front view of the pen tip holder 15, the pen tip holder 15 is formed with a press-fit fixing portion 15a in which the pen tip 3 is press-fitted and fixed forward in a tubular body, and the pen tip 3 is written. It is inserted until the step portion 15c formed between the portion 3a and the connecting portion 3b and the step portion 15b of the press-fit fixing portion 15a come into contact with each other. The pen tip holder 15 is press-fitted and fixed inside the small diameter portion 2a of the writing tool main body 2. Since the pen tip holder 15 is a molded part and polypropylene is used as a material, the diameter of the small diameter portion 2a of the writing instrument main body 2 expands when the pen tip holder 15 is press-fitted and fixed inside the writing instrument main body 2. Therefore, the outer diameter of the pen tip holder 15 and the inner diameter of the holding rib 2d formed on the inner surface of the small diameter portion 2a of the writing instrument main body 2 have a loose press-fitting relationship. However, in order to maintain the pulling strength of the pen tip holder 15 from the writing instrument main body 2, a groove portion 15c is provided in the middle portion of the pen tip holder 15, and the holding rib 2d of the writing instrument main body 2 is provided in the groove portion 15c. The C-shaped pen tip holding convex portion 2e formed at the rear is caught. As a result, the pen tip holder 15 is prevented from falling off from the writing tool main body 2.
As shown in FIG. 7, a plurality of ribs 2f for guiding the ink storage body 14 when the ink storage body 14 is inserted are large rearward on the inner wall surface of the large diameter portion 2b of the writing tool main body 2 for accommodating the ink storage body 14. It is formed up to the front of the gate portion 2u located on the outer surface of the diameter portion 2b. The change in wall thickness until the resin flowing in from the gate portion 2u by injection molding reaches the convex portion 2t, which will be described later, is eliminated as much as possible to prevent the occurrence of molding defects such as flow marks during molding.
Further, an anti-shake rib 2r is formed on the side surface opposite to the protrusion 2l in front of the outer peripheral surface of the large diameter portion 2b to prevent radial shake when the writing tool main body 2 moves back and forth in the exterior body 1. ing.
Further, on the rear inner side surface of the large diameter portion 2b of the writing tool main body 2, a female screw portion 2s for screwing with the operation member 8 described later, and a convex portion 2t in front of the female screw portion 2t for making the internal space liquid-tight. Is formed in a circumferential shape.

As shown in FIG. 10 which is a perspective view of the tip end portion of the writing tool main body 2, the front end surface of the writing tool main body 2 has a concave curved surface 2g that abuts on the inner cam portion 9j of the lid body 9 to give a rotational force to the lid body 9. Is provided. The concave curved surface 2g of the writing tool main body 2 is a concave curved surface having two first and second radius of curvature, and the radius of curvature of the first curved surface is the curvature of the second curved surface from the rear to the front of the writing tool main body 2. The curved surface is larger than the radius, and the two curved surfaces are gently connected so that the angle is not as large as possible. The inner cam portion 9j of the lid 9 moves on the concave curved surface 2g from the second curved surface to the first curved surface. A chamfered portion 2h is formed on a part of the concave curved surface 2g. This is provided so that the lid 9 rotates and the inner cam portion 9j smoothly separates the writing tool main body 2 from the concave curved surface 2g. As a result, it is possible to reduce the wear of the inner cam portion 9j and the corner portion of the concave curved surface 2g, and it can be used for a long time without malfunction even after repeated use.
An air groove 2k is provided in the writing instrument main body 2 so that gas can pass through the inside and the outside of the writing instrument main body 2 between the inner surface of the small diameter portion 2a of the writing instrument main body 2 and the outer surface of the pen tip holder 15.

As shown in FIG. 11, which is a perspective view of the rear portion of the writing tool main body 2, protrusions 2l are formed upward on the rear outer peripheral surface of the large diameter portion 2b of the writing tool main body 2, and are formed on the side portions of the exterior body 1. It projects to the outside of the exterior body 1 through the provided window hole 1k. The protrusion 2l is engaged with the pen tip immersion engaging portion 1u so that the writing instrument main body 2 urged rearward maintains the pen tip 3 immersion state.
A recess 2m for rotatably arranging the rotor 7 having a C-shaped cross section, which will be described later, is formed in front of the protrusion 2l. The recess 2m has a cross-sectional shape that matches the cross-sectional shape of the rotor 7 and is formed in a C shape so as not to interfere with each other within the range in which the rotor 7 rotates.
Further, the recess 2m has a C-shaped portion 2n having a short leg in the circumferential direction at the front and a C-shaped portion 2o having a long leg in the circumferential direction at the rear.

As shown in FIG. 12, which is a front view of the operating member 8, the rear end of the operating member 8 is exposed from the rear end opening 1b of the exterior body 1, and is inserted forward with the knock portion 8a for pressing the writing tool main body 2. A portion 8b is formed, and the insertion portion 8b is screwed into the liquid honey in the inward direction of the large diameter portion 2b of the writing tool main body 2 so that the ink storage body 14 is interposed in the internal space of the operating member 8. There is. The screw between the male screw portion 8c formed on the outer peripheral surface of the insertion portion 8b of the operating member 8 and the female screw portion 2s of the writing instrument main body 2 is composed of a single-thread screw, but a multi-thread screw may also be used. Further, if the writing tool main body 2 and the operating member 8 can be attached and detached in a liquid-tight manner, they may be fitted as overcoming ribs. Further, in order to make the operating member 8 and the writing instrument main body 2 liquid-tight in the inserted state, a concave contact portion 8d that fits with the convex portion 2t of the writing instrument main body 2 is provided in front of the male screw portion 8c of the operating member 8. Although it is provided, the contact portion 8d may have a convex shape or a flat shape. By forming the abutting portion 8d into a concave shape, the operating member 8 can be inserted without contacting the female screw portion 2s formed on the writing tool main body 2 and damaging the surface of the abutting portion 8d.
As shown in FIG. 13 which is a front view of the vertical cross section of the operating member 8 and FIG. 14 which is a view seen from the front in the direction in which the ink storage body 14 of the operating member 8 is inserted, the bottom and the inside of the inner wall of the operating member 8. A plurality of ribs 8e are formed on the wall, and in particular, the ribs 8e on the inner side wall extend in the longitudinal direction, and communicate with the internal space of the writing tool main body 2 between the inside of the operating member 8 and the ink occlusion body 14. The ink storage body 14 is sandwiched by the ribs 8e, and the ink storage body 14 is removed together with the writing tool main body 2 when the operating member 8 is removed from the writing tool main body 2. There is. On the other hand, the plurality of ribs 2f of the writing tool main body 2 serve as a guide when inserting the ink storage body 14, and the inscribed circle diameter of the rib 2f is set to be larger than the outer diameter of the ink storage body 14 at the time of storage. It is not held by the plurality of ribs 2f of the writing tool main body 2. The ink storage body 14 is held by the connecting portion 3b of the pen tip 3 connected from the front end portion and the plurality of ribs 8e of the operating member 8. By doing so, when the ink impregnated in the ink occlusion body 14 is consumed and becomes low or the ink runs out, the ink occlusion body 14 is taken out together with the operation member 8 and impregnated with the ink again, or the ink is impregnated. The entire storage body 14 can be replaced. The plurality of ribs 8e on the inner side wall of the operating member 8 have a plate-like cross section, and the inscribed circle diameter and the width of the top surface in contact with the ink storage body 14 are constant. The front end portions of the plurality of ribs 8e are formed with tapered portions 8f that sneak into the inner side surface of the operating member 8 toward the front. The tapered portion 8f serves as a guide when the ink storage body 14 is inserted into the operation member 8, and the ink storage body 14 can be housed in the operation member 8 without being caught.
Behind the plurality of ribs 8e, receiving ribs 8g having a reduced inscribed circle diameter extend from the bottom of the inner wall of the operating member 8. When the end of the ink storage body 14 comes into contact with the receiving rib 8g, the insertion of the ink storage body 14 is completed. By providing the receiving ribs 8g, a space is created between the end portion of the ink storage body 14 and the bottom portion of the inner wall of the operating member 8, and a ventilation path is provided by the plurality of ribs 8e. Furthermore, it also plays a role of holding the ink when the ink leaks from the ink storage body due to an impact or the like.
A recess 8g is formed in the center of the top surface of the operating member 8, and a step portion 8h having a diameter larger than that of the recess 8g and a shallow depth is formed.
The recess 8g serves as a gate portion for injection molding, and is a deep groove so that the gate residue generated at the time of mold release does not protrude from the end surface of the operating member 8. Further, the step portion 8h is a step portion for attaching a seal so as not to protrude from the end surface of the tail plug 5. Furthermore, by attaching a sticker, the gate mark can be hidden and the appearance can be improved.
Further, the ink storage body 14 is covered with a synthetic resin film such as polyethylene to prevent the hands from getting dirty even if it is touched at the time of replacement.

As shown in FIG. 15, which is a perspective view of the lid body 9, the lid body 9 includes a spherical lid portion 9a that can close the tip opening 1a of the exterior body 1 and a columnar rotating shaft 9c in a protruding state to the outside. It has a side wall portion 9b. The top of the rotating shaft 9c is formed of an inclined curved surface so that the lid 9 does not interfere with the exterior body 1 when it rotates and moves inside the exterior body 1. Since the lid body 9 is provided with the notch portion 9l, the orientation of the lid body 9 can be visually recognized, and the assembling property is improved.
On the rotation shaft 9c of the lid body 9, when the side wall portion 9b is viewed from the direction (side surface) of FIG. An open cam protrusion 9f is formed so as to project in the direction opposite to the outer cam portion 9e in the direction of 90 degrees. The closed cam protrusion 9d and the open cam protrusion 9f are each inclined so that the width becomes smaller as the distance from the rotating shaft 9c increases. Further, a concave cam portion 9g is formed between the closed cam projection 9d and the open cam projection 9f of the rotating shaft 9c toward the center of the rotating shaft 9c. The concave cam portion 9g is substantially elliptical because both side surfaces are tapered in a direction that narrows the width toward the center of the rotating shaft 9c and is in contact with the top of the central protrusion 1g of the bearing portion 1c of the exterior body 1. It is connected by a curved surface.
The closed cam protrusion 9d, the open cam protrusion 9f, and the concave cam portion 9g are portions (gear portions) corresponding to the gears partially formed on the rotating shaft 9c described above.
By forming such a gear portion including the closed cam protrusion 9d, the open cam protrusion 9f, and the concave cam portion 9g on the rotating shaft 9c, the operation of rotating and moving up and down so that the rotating shaft 9c rolls is approximately realized. be able to.
Corner portions are formed at both ends of the gear portion of the rotating shaft 9c, and opening stoppers 9h and closing stoppers 9i are formed to define the end points of the operation when the lid 9 is opened and closed.
The opening stopper 9h regulates the end point of the opening operation of the lid body 9, and the end point of the opening operation of the lid body 9 is set by abutting with the flat opening stopper contact wall 1h formed on the bearing portion 1c of the exterior body 1. Prescribe. On the other hand, the closing stopper 9i regulates the end point in the closing operation of the lid 9, and abuts on the flat closing stopper contact wall 1i formed on the bearing portion 1c of the exterior body 1 to define the closing operation of the lid 9. ..
Further, the portion between the side wall portions 9b of the lid 9 is a space portion, and when the lid 9 rotates and moves to open the tip opening 1a of the exterior body 1, the pen tip 3 and the writing instrument main body are opened. It forms a passage through which 2.
Further, the outer cam portion 9e has a cam surface 9k, and the cam surface 9k receives the forward urging force by the coil spring 11 via the annular member 13, and the lid body 9 receives the force in the rotational direction.
As shown in FIG. 17, which is a front view of the cross section showing the inside of the lid body 9, an inner cam portion 9j, which is an inward protrusion, is formed inside the side wall portion 9b. The inner cam portion 9j is a portion that comes into contact with the writing tool main body 2 by advancing the writing tool main body 2.
In this embodiment, the inner cam portion 9j and the lid portion 9a are provided at the farthest positions on the side wall portion 9b. By forming the inner cam portion 9j and the lid portion 9a at positions as far apart as possible, a wide space is provided between the lid portion 9a and the contact point between the writing instrument main body 2 and the inner cam portion 9j of the lid body 9. In the closed state of the lid body 9, the distance in the longitudinal direction from the most advanced position of the pen tip 3 to the contact point between the writing instrument main body 2 and the inner cam portion 9j of the lid body 9 can be obtained, and the writing instrument can be written. A long pen tip 3 can be provided at the tip of the main body 2. Further, the distance from the inner cam portion 9j to the rotation shaft 9c can be increased, and the lid body 9 can be rotated with a smaller knock load.
Since the inner cam portion 9j is a portion that receives a load from the writing tool main body 2 to rotate and move the lid body 9, if the inner cam portion 9j is too small, it may be damaged during operation, and the lid body is made of thermoplastic resin. When making 9, the cross-sectional area of the inner cam portion 9j is preferably 0.2 mm2 or more. However, when the inner cam portion 9j is enlarged, the contact point between the inner cam portion 9j and the writing tool main body 2 moves toward the rotation axis 9c side of the lid 9 during the rotation and movement of the lid 9, and the contact point is reached. Since the distance from the center of rotation of the closure changes short, it is preferable to make the distance that the contact point moves as small as possible in terms of reducing the knock load. Therefore, it is preferable that the diameter of the inner cam portion 9j is 0.4 mm or more and 5.0 mm or less, and the moving distance of the contact point is 3 mm or less.
The lid 9 uses polyacetal, which has self-lubricating properties and is excellent in frictional wear resistance.
In the present invention, since the opening operation of the lid 9 is moved upward from the axis of the exterior 1 while rotating, the opening operation of the lid 9 is moved upward from the axis of the exterior 1 from the inner edge of the tip opening 1a of the exterior 1 in which the lid 9 is in close contact. Rotate away. Therefore, the sliding resistance between the lid 9 and the inner edge of the tip opening 1a is reduced, the wear of the inner edge between the lid 9 and the tip opening 1a is suppressed, and the airtightness can be maintained. Therefore, even if the material of the lid 9 is slightly inferior in wear resistance, it can be appropriately selected. As an example, polypropylene, polybutylene terephthalate, polyethylene, and polyethylene terephthalate, which are materials having low gas permeation, can be positively used.
Since the lid body 9 has a substantially U-shape in shape, the side wall portion 9b of the lid body 9 tends to bend inward during injection molding of parts. In order to prevent this bending, a gate, which is a resin inflow port of the mold, is arranged in the outer central portion of the lid portion 9a. Further, the surface of the lid portion 9a is formed in a flat surface in order to realize the contact between the lid body 9 and the tip opening 1a more quickly. Further, a head portion 9 m projecting from the surface of the lid portion 9a is formed, and a gate is arranged at the top of the head portion 9 m. In order to eliminate the influence of the rubbing of the lid 9 and the tip opening 1a due to the remaining gate, a recess 9n is formed around the remaining gate. Further, the gate diameter is relatively large, and the gate diameter is 0.5 mm or more because the bending after molding is reduced when the thermoplastic resin can sufficiently retain the holding pressure after flowing in molding. It is better to set it to 0.8 mm or less.
Further, the lid portion 9a should have a uniform wall thickness in order to prevent sink marks and flow marks during molding as much as possible. However, when the rotation shaft 9c is formed on the outside of the side wall portion 9b as in the present embodiment, that portion becomes a thick portion, so that the resin is pulled outward when it shrinks, and the side wall portion There is a risk that the distance between the inner cam portions 9j facing each other inside the 9b will increase. If the distance between the inner cam portions is large, it becomes difficult for a force to be applied when the writing instrument main body 2 comes into contact with each other, which may hinder the rotation of the lid body. Therefore, in this embodiment, in order to control the distance between the inner cam portions 9j, a cross-shaped beam 9o is formed on the back side of the lid portion 9a (see FIGS. 15 and 17 to 18). By increasing or decreasing the width of the beam 9o depending on the shape of the rotating shaft 9c, the phenomenon of being pulled outward due to heat shrinkage is suppressed, and the distance between the inner cam portions 9j can be controlled. Then, the lid body 9 can realize stable continuous molding. In this embodiment, the width of the beam 9o is a 1.5 mm cross, but the vertical and horizontal widths may be different.

As shown in FIG. 19 which is a perspective view of the annular member 13, the annular member 13 has a connecting portion 13a for connecting to the annular elastic body 12 and a side wall portion 13b for applying a forward urging force to the lid 9. A contact surface 13c is provided at the front end of the side wall portion 13b. A protrusion 13d is provided on the contact surface 13c. The side wall portion 13b transmits the elastic force of the rear coil spring 11 to the outer cam portion 9e of the lid 9 via the contact surface 13c, so that the lid 9 closes the tip opening 1a of the exterior body 1. It gives a rotational force.
Further, the connecting portion 13a is formed with a middle hole portion 13e through which the small diameter portion 2a of the writing tool main body 2 can pass.
A flat surface is formed on the outer surface of the side wall portion 13b, and a step portion 13f is formed in the front-rear direction. When the step portion 13f is arranged inside the exterior body 1, it faces the closing stopper contact wall 1i formed at the end of the bearing portion 1c of the exterior body 1, which will be described later, and the annular member 13 is the exterior. It prevents the body 1 from rotating about the axis of the exterior body 1.
Since the annular member 13 is a member that slides in contact with the lid body 9 to rotate and move the lid body 9 up and down, polyacetal having self-lubricating property and excellent frictional wear property is used.

As shown in FIG. 20, which is a vertical sectional perspective view of the annular elastic body 12, the annular elastic body 12 has an inner surface of the outer body 1 in a state where the lid 9 closes the tip opening 1a of the outer body 1 to the outside. It has an outer sealing rib 12a that is in close contact with the outer body and an outer tilt preventing rib 12b that prevents the annular elastic body 12 from tilting too much when sliding in the exterior body 1. Inside, it has an inner sealing rib 12c that is in close contact with the writing tool main body 2. The inner sealing rib 12c is a double-row rib, but by retaining a volatile liquid substance described later between the ribs, the sealing with the writing tool main body 2 is ensured and the sliding resistance is suppressed to a low level. There is. Further, by shifting the forming positions of the outer sealing rib 12a and the inner sealing rib 12c back and forth in the axial direction, the outer sealing rib 12a bends inward due to the contact with the exterior body 1 and the inner sealing due to the contact with the writing tool main body 2. Since the bending of the rib 12c to the outside does not collide with each other in the radial direction, the sliding resistance when the writing tool main body 2 moves and when the annular elastic body 12 moves backward is reduced.
A step portion 12d for connecting to the connecting portion 13a of the annular member 13 is formed at the front end portion of the annular elastic body 12. Further, a receiving groove 12e for receiving the coil spring 11 is formed behind the annular elastic body 12, and the front end portion of the coil spring 11 is in contact with the bottom surface of the receiving groove 12e. By forming the receiving groove 12e in this way, the distance between the coil spring 11 and the annular member 13 becomes short, and the deformation of the annular elastic body 12 due to the urging force of the coil spring 11 can be minimized, and the annular member 13 can be minimized. It makes it easier to convey the force to the spring.
The annular elastic body 12, the exterior body 1, and the writing instrument main body 2 seal the pen tip sealing space rearward, but the inner sealing rib 12c of the annular elastic body 12 seals while sliding with the writing instrument main body 2. The outer sealing rib 12a seals while sliding with the exterior body 1. That is, in order to perform sealing, the inner diameter of the inner sealing rib 12c (part A in FIG. 20) is smaller than the outer diameter of the writing tool main body 2 (part B in FIG. 10), and the outer diameter of the outer sealing rib 12a (part A in FIG. 20). The C part) is set to be larger than the inner diameter of the exterior body 1 (D part in FIG. 3), but if the diameter difference between the members, that is, BA and CD, is large, the sealing becomes strong. Since the amount of friction that becomes a load when the writing tool main body 2 moves back and forth increases, the sliding becomes worse. Therefore, in order to obtain a good knock feeling, the diameter difference between the members is preferably 0.1 mm or more and 0.4 mm or less as a range in which the knock load is 1 kgf or less and sufficient sealing can be obtained. The diameter difference between the inner sealing rib 12c and the writing tool main body 2 is 0.3 mm, and the diameter difference between the outer sealing rib 12a and the outer body 1 is 0.2 mm.

Materials of the annular elastic body 10 and the annular elastic body 12 that keep the space inside the cap airtight include isobutylene rubber, butadiene rubber, styrene-butadiene rubber, ditryl rubber, chloroprene rubber, butyl rubber, ethylene propylene rubber, and chlorosulfonated. Polyethylene, chlorinated polyethylene, acrylic rubber, silicon rubber, acrylonitrile butadiene rubber, urethane rubber, fluororubber, epichlorohydrin rubber, polysulfide rubber, olefin-based thermoplastic elastomer, styrene-based thermoplastic elastomer rubber and elastomer, etc. Any mixture of butyl rubber can be selected and has excellent chemical resistance to ink and gas permeability that affects airtightness, but butyl rubber has excellent chemical resistance and gas permeability. Good sealing can be performed. Further, in particular, since the halogenated butyl rubber has a small compression set, the elastic deformation at the time of sliding can easily return to the original shape at rest, and good sealing and sliding can be performed.
Further, by arranging the annular elastic body 12 at a position close to the lid body 9, the storage space of the pen tip 3 is made small, and the drying of the pen tip in the storage space is suppressed as much as possible. In particular, in the case of a thin pen tip 3, the size of the storage space of the pen tip 3 greatly affects the drying of the pen tip in the storage space, so that the drying of the pen tip is suppressed more effectively.

By applying a non-volatile liquid material to the sliding contact portion of each member, it is possible to suppress friction during sliding contact. The refractory liquid may have a freezing point of -22 ° C or lower, a boiling point of 145 ° C or higher, and a viscosity of 10 mPa · s or higher and 500,000 mPa · s (20 ° C) or lower. , Soybean oil, rapeseed oil, corn oil, red flower oil, rice oil, cottonseed oil, sesame oil, peanut oil, olive oil, palm oil, etc. Examples of synthetic lubricating oils include hydrocarbon-based synthetic lubricating oils such as Α-olefin (poly-Α-olefin), polybutene (polyisobutylene), and alkylbenzene, diesters (dibasic acid esters), and polyol esters. Fatty acid ester synthetic lubricating oil such as (hindered ester), silicone synthetic lubricating oil such as silicone oil, silicic acid ester, silane, fluorosynthetic lubricating oil such as chlorofluorocarbon, perfluoropolyether, fluoroester, phenyl ether , Phosphate ester and the like. These may be used alone or in combination of two or more. Further, these may be gelled.
In particular, when synthetic resin, rubber, elastomer, etc. are used for the members constituting the sliding contact portion, they are chemically stable to solvents such as ink, and have releasability and non-adhesive properties. Straight silicone oils such as polydimethylsiloxane, polymethylhydrogensiloxane, polymethylphenylsiloxane, and cyclic dimethylsiloxane, which have low surface tension and easily spread on the surface of substances, and side chains and / or both ends are modified with organic groups. Also, amino-modified, epoxy-modified, carbinol-modified, mercapto-modified, carboxyl-modified, methacryl-modified, polyether-modified, phenol-modified, silanol-modified, aralkyl-modified, fluoroalkyl-modified, long-chain alkyl-modified higher fatty acid ester-modified, higher fatty acid-containing Modified silicone oils such as are preferably used. Further, straight silicone oils such as polydimethylsiloxane, polymethylhydrogensiloxane, polymethylphenylsiloxane, and cyclic dimethylsiloxane have little change in viscosity with temperature, and are therefore not easily affected by environmental changes and the like.
In addition to this portion, these refractory liquid substances can be arranged on a member whose liquidtightness is to be imparted or whose sliding resistance is to be reduced.
In this embodiment, polydimethylsiloxane having a freezing point of −50 ° C. or lower, a boiling point of 200 ° C., and a viscosity of 30,000 mPa · s (20 ° C.) is applied to the sliding contact portion of each member as a refractory liquid substance. The airtightness and the low coefficient of friction of sliding are realized.

The clip 4 shown in FIG. 21 which is a perspective view of the clip 4, FIG. 22 viewed from below the clip 4, and FIG. 23 which is a perspective view seen from below the clip 4 covers the window hole 1k of the exterior body 1. Arranged. A coil spring holding protrusion 4c extending toward the exterior body is formed at the base end portion 4a of the clip 4, and is inserted into the coil spring 6. The coil spring holding protrusions 4c are formed with protrusions 4i on both side surfaces and a coil spring press-fitting portion 4j at the root. The coil spring press-fitting portion 4j has an outer diameter slightly larger than the inner diameter of the coil spring 6, and when the coil spring holding protrusion 4c is inserted into the coil spring 6, the coil spring 6 is held in a press-fitting relationship. can do. Further, the presence of the protrusion 4i can prevent the coil spring 6 from laterally shaking after press fitting. Further, the coil spring holding projection 4c is provided with a slit 4h in the longitudinal direction of the exterior body 1.
A through hole 4g is provided in the base end portion 4a, and by inserting the protrusion 5e of the base portion 5, the clip 4 is attached to the base portion 5, and the clip 4 that receives the upward urging force by the coil spring 6 protrudes. The anti-base end portion 4b is urged toward the exterior body 1 side with the through hole 4g into which the 5e is inserted as a rotation axis. Here, the presence of the slit 4h makes it easier for the base end portion 4a of the clip 4 to temporarily expand laterally in order to insert the protrusion 5e into the through hole 4g when the clip 4 is attached to the base portion 5. The clip 4 can be easily attached to the base 5.
A first inclined wall 4d that guides the convex portion 7a of the rotor 7 in the radial direction of the exterior body 1 projects from the anti-base end portion 4b of the clip 4. A second inclined wall 1o is located in front of the first inclined wall 4d. Further, at a position in front of the pen tip protruding engaging portion 1p, behind the second inclined wall 1o and in front of the first inclined wall, from the side where the pen tip protruding engaging portion 1p is located. , A third inclined wall 4e inclined toward the front protrudes. The third inclined wall 4e abuts the front side surface of the convex portion 7a of the rotor 7 so that the convex portion 7a is guided in the circumferential direction by the second inclined wall 1o and in the circumferential direction in the opposite direction. Since the guide is provided, the width of the guide path 1v formed in the exterior body 1 in the circumferential direction can be narrowed, and the exterior body 1 can be made slender. Further, since the third inclined wall 4e is provided behind the second inclined wall 1o, the convex portion 7a of the rotor 7 is moved from the pen tip immersion engaging portion 1u to the pen tip protruding engaging portion 1p. Since it is possible to guide the convex portion 7a from the pen tip protruding engaging portion 1p to the pen tip immersion engaging portion 1u without guiding the convex portion 7a forward, the pen tip 3 can be easily immersed. It will be.
A regulation wall 4f is provided in the middle of the third inclined wall 4e. The height of the regulation wall 4f is set so as to come into contact with the top of the convex portion 7a and lift the clip slightly. When the convex portion 7a passes through the regulation wall 4f, the slightly lifted clip emits an impact sound due to the return impact, which is a signal for releasing the knock.
Further, at the end of the third inclined wall 4e, a front regulating surface 4k for restricting the forward movement of the rotor 7 is formed, and the convex portion 7a is formed in the front immediately after passing through the regulating wall 4f. The regulation surface 4k restricts the forward movement, and the first sloping wall 4d restricts the movement in the circumferential direction. Then, after the forward operation of the writing instrument main body 2 is released, the writing instrument main body 2 moves backward by the rear urging force of the coil spring 11, but at that time, the convex portion 7a is in charge of protruding the pen tip due to the regulation wall 4f. It does not move to the joint portion 1p side, but is surely guided to the fourth inclined wall 1q.
In this embodiment, the material of the clip 4 is polycarbonate having excellent transparency and moldability in consideration of the appearance.

As shown in FIG. 24 which is a perspective view of the base 5, FIG. 25 which is a side view of the base 5, a vertical sectional view 26 of the base 5, and FIG. 27 viewed from below the base 5, the base 5 is attached to the base. Front and rear engaging protrusions (front engaging protrusion 5a, rear engaging protrusion 5a, rear engaging protrusions) projecting downward along both side surfaces of the base 5 so as to engage the front engaging hole 1C and the rear engaging hole 1D of the portion 1w. 5b) is formed. The rear engaging protrusion 5b is formed with a claw portion 5d facing in the circumferential direction, and the front engaging protrusion 5a is formed with a claw portion 5c facing forward.
In front of the center of the lower surface of the base portion 5, a protrusion 5f is formed so as to enter the narrow portion 1 m of the window hole 1k of the exterior body 1 so as to enter the narrow portion 1 m, and the width of the window hole 1k of the exterior body 1 is formed. It serves as a pen tip immersion engaging portion 1u so as to surround both side edges of the narrow portion 1 m.
Further, a contact surface 5 g is formed in the lower surface of the base portion 5, and the bridging portion 1A of the base portion attachment portion 1w of the exterior body 1 comes into contact with the contact surface, whereby the attachment of the base portion 5 and the exterior body 1 is completed. An inclined step portion 5h and an inclined step portion 5i are formed behind the protrusion 5f and the rear engaging protrusion 5b, respectively. With the inclined step portion 5h and the inclined step portion 5i, when the base portion 5 is attached to the exterior body 1, the claw portion 5c of the front engaging projection 5a can be inserted into the front engaging hole 1C without being caught. , Easy to set.

As shown in FIG. 28 which is a perspective view of the rotor 7 and FIG. 29 which is a view seen from above of the rotor 7, the rotor 7 has a C-shaped portion similar to the cross section of the recess 2 m of the writing tool main body 2. It has 7b, and narrow extension portions 7c are formed from both ends thereof. This is because when the rotor 7 is assembled into the recess 2 m of the writing tool body 2 in the opposite directions, the short extension portion 7c of the rotor 7 is the short C-shaped portion 2n and the foot of the recess 2 m of the writing tool body 2. By interfering with the long C-shaped part 2o, it plays a role of preventing erroneous assembly.
A recess 7j is formed on the side surface of the C-shaped portion 7b to form a gate portion in order to eliminate resistance due to the gate residue when the rotor 7 moves back and forth and in a circumferential shape in the exterior body 1.
On the outer surface of the rotor 7, a convex portion 7a inserted into the window hole 1k of the exterior body 1 and guided to each inclined wall is provided on the outer surface of the exterior body 1 through the window hole 1k provided on the side portion of the exterior body 1. It protrudes out of.
The front side surface 7e of the convex portion 7a is inclined upward and forward, and is set so as to face parallel to the front regulation surface 4k of the clip 4 (see FIG. 52). Further, on the upper side of the front side surface 7e, a pressing step portion 7f formed of a lower end surface extending forward and a pressing protrusion 7h composed of a pressing protrusion front side surface 7g extending vertically upward from the front end of the pressing step portion 7f are formed. (See FIG. 30).
The cross section of the convex portion 7a is a rectangle extending in the front-rear direction, and a tapered surface of 45 ° is provided at both front corners, and a rear inclined surface 7d is provided at the rear. It suffices that the guide path formed in the window hole 1k of the exterior body 1 can be passed, and the pen tip protruding engaging portion 1p can be locked to maintain the pen tip protruding state.
The C-shaped portion 7b has a flat surface portion 7i formed from the front end portion toward the protrusion 7a. As a result, when the convex portion 7a moves along the second inclined wall 1o of the exterior body 1, it does not interfere with the R portion at the base of the convex portion 7a.
The rotor 7 includes a first inclined wall 4d and a third inclined wall 4e formed on the anti-base end portion 4b of the clip 4, a second inclined wall 1o formed on the exterior body 1, and a fourth inclined wall. Since it rotates in the recess 2 m formed in the writing tool main body 2 along 1q, polyoxymethylene having excellent sliding characteristics is used.

Next, FIG. 31 is a perspective view of each part of the writing instrument developed, and a method of assembling each part on the exterior body 1 will be described.
First, the annular elastic body 10 is inserted into the exterior body 1 from the rear end opening 1b of the exterior body 1 and press-fitted and fixed to the fixing portion 1G formed behind the tip opening 1a of the exterior body 1. Subsequently, the lid body 9, the annular member 13, the annular elastic body 12, and the coil spring 11 are inserted in this order from the rear end opening 1b of the exterior body 1.
Next, the pen tip 3, the pen tip holder 15, the ink storage body 14 filled with ink, and the operating member 8 were assembled to the writing instrument main body 2, and the rotor 7 was set in the recess 2 m formed in the rear outer portion of the writing instrument main body 2. The writing instrument body 2 was inserted from the rear end opening 1b of the exterior body 1, and the protrusion 2l of the writing instrument body 2 got over the protrusion 1r of the exterior body 1 and was temporarily engaged to be urged rearward by the coil spring 11. The writing instrument main body 2 can be housed in the exterior body 1.
In this state, a closed space is created that blocks the space where the pen tip 3 exists from the outside air.
Finally, the clip 4 is pressed and fitted into the base mounting portion 1w of the exterior body 1 from above via the coil spring 6 and the base portion 5. The situation at this time will be described with reference to FIG. 32 showing a vertical sectional front view of the front engaging projection 5a and the rear engaging projection 5b of the base portion 5 and FIG. 33 showing a vertical sectional view cut from the center of the base portion 5. .. (1) of FIGS. 32 and 33 is a view before assembling the base 5 to the exterior body 1, (2) shows a state in which the assembling is in progress, and (3) shows a state in which the assembling is completed. Is shown.
When the base portion 5 is moved downward from the state of (1) in FIGS. 32 and 33, the protrusion 5f of the base portion 5 comes into contact with the front end surface of the bridging portion 1A of the exterior body 1, and subsequently the front engaging protrusions 5a and The rear engaging projection 5b enters the front engaging hole 1C and the rear engaging hole 1D of the exterior body 1, respectively. Since the inclined step portion 5h and the inclined step portion 5i are formed on the protrusion 5f and the rear engaging protrusion 5b, the claw portion 5c formed on the front engaging protrusion 5a is inserted without being caught in the front engaging hole 1C. be able to.
When pushed to (2) of FIGS. 32 and 33, the base portion 5 moves forward and enters due to the inclined step portion 5h and the inclined step portion 5i. At this time, the front engaging protrusion 5a is pushed backward by the claw portion 5c and enters while being deformed, but since it is pushed all at once to the state of (3) in FIGS. 32 and 33, the deformation of the front engaging protrusion 5a is minimized. can do.
Further, as shown in FIG. 34 in a front view in which the base portion 5 is arranged on the exterior body 1 and viewed from the rear, the base portion 5 arranged on the exterior body 1 is a bridging portion between the contact surface 5g and the clip mounting portion 1w. In a state where 1A is in contact with the front engaging protrusion 5a and the rear engaging protrusion 5b and fixed to the exterior body 1 by engaging 1C and 1D, the base portion 5 and the engaging portion 1B of the clip mounting portion 1w A slight gap F is provided between the two. By providing the gap F in this way, when the base portion 5 is attached to the exterior body 1, it can be used as a downward bending allowance for both side surfaces of the base portion 5, and the base portion 5 can be attached to the clip attachment portion 1w more reliably. Can be done.

In FIGS. 35 and 36, as the writing instrument main body 2 moves forward, the lid 9 rotates and moves upward to open the tip opening 1a of the exterior body 1, and the pen tip 3 and the writing instrument main body 2 open the tip opening. The state of protruding from 1a is shown. For convenience of explanation, FIG. 35 is a vertical cross-sectional front view, the pen tip 3 is not displayed, and FIG. 36 shows the exterior body 1 and the annular elastic body 9 as a vertical cross-sectional front view. In addition, each step (1)-(6) of FIG. 35 and FIG. 36 shows the same moment.
37 to 42 are front enlarged front views of the stages (1) to (6) of FIGS. 35, respectively, and show in detail the rotation and upward movement of the rotation shaft 9c of the lid body 9. ing.
Further, the bearing portion 1c of the exterior body 1 which is hidden behind the lid 9 and is not originally visible is shown by a broken line for convenience of explanation.

As the writing tool main body 2 advances, the concave curved surface 2g of the writing tool main body 2 and the inner cam portion 9j of the lid 9 come into contact with each other, and the lid 9 tries to move upward along the long concave shape above the bearing portion 1c. At this time, the closed cam protrusion 9d of the rotating shaft 9c is contained in the closed recess 1f of the bearing portion 1c (step (1) and FIG. 37). Therefore, when the rotating shaft 9c receives an upward force, the closed cam protrusion 9d presses the inclined surface 1j extending the closed recess 1f and the central protrusion 1g. However, the closed cam protrusion 9d cannot move upward due to the closed recess 1f or the central protrusion 1g, and rotates around the contact portion between the closed cam protrusion 9d and the inclined surface 1j. As a result, since the closed cam protrusion 8d is a curved surface, the contact portion with the inclined surface 1j moves so as to climb the closed central protrusion 1g inclined surface 1j (step (2) and FIG. 38).
When the writing tool main body 2 advances to the state of step (3) and FIG. 39, the contact between the closed cam projection 9d of the rotating shaft 9c and the inclined surface 1j is released. Then, the R-curved top of the central protrusion 1g formed on the bearing portion 1c comes into contact with the concave cam portion 9g of the rotation shaft 9c, so that the lid 8 rotates while moving upward.
Further, when the writing tool main body 2 advances to the state of step (4) and FIG. 40, the rotating shaft 9c rotates and moves upward so that the open cam protrusion 9f of the rotating shaft 9c enters the opening recess 1e of the bearing portion 1c.
In the state of step (5) and FIG. 41, the open cam protrusion 9f of the rotating shaft 9c is in a state immediately before entering the open recess 1e of the bearing portion 1c, and the outer cam portion 9e of the lid 9 is the contact surface 13c of the annular member 13. Pressed by, slides on the contact surface 13c, and comes into contact with the protrusion 13d so as to push up the annular member 13.
By further advancing the writing instrument body 2 at a position where the inner cam portion 9j of the lid 9 and the concave curved surface 2g of the writing instrument body 2 do not contact, the pen tip 3 and the tip of the writing instrument body 2 are projected from the tip opening 1a of the exterior body 1. (Step (6) and FIG. 42).
When the outer cam portion 9e of the lid 9 comes into contact with the 13d so as to push up the annular member 13, the writing tool main body 2 can be rotated in the direction of closing the lid 9 in the process of retracting.

In this embodiment, the protrusions formed on the rotating shaft 9c and the recesses formed on the bearing portion of the exterior body are each formed as two, but two or more protrusions and recesses can also be formed. By increasing the number of protrusions and recesses, the contact between the protrusions and the recesses changes one after another, and the rotational and linear motions can be performed more smoothly. This is the so-called "rack & pinion" in gears.

In this embodiment, two cams are provided on the rotating shaft 8c of the lid body 8, and each cam fits in the recess of the bearing portion 1c of the exterior body 1 in the closed and opened states. At the start, the linear force applied to the lid 8 can be changed to a force that rotates and moves up and down more reliably, and the rotation and movement of the lid 8 can be performed reliably.
By operating the rotating shaft so as to roll with respect to the bearing portion in this way, the frictional resistance between the rotating shaft and the bearing portion can be eliminated, and the rotation and movement of the lid 8 can be facilitated. Further, since there is no wear on the bearing portion of the rotating shaft due to repeated opening and closing of the lid body 8, damage to the rotating shaft can be prevented, and durability can be improved. In addition, the diameter of the rotating shaft becomes smaller due to wear, and it is possible to prevent malfunction due to rattling of the bearing portion and improve durability.

Next, as shown in FIG. 43, which is a front view of only the anti-base end portion of the clip 4 viewed from above on the rear operation portion of the writing tool 2, FIGS. 44 to 44 are enlarged views of the window hole 1k portion of the exterior body 1. Based on 51, a protruding position where the convex portion 13a of the rotor 13 forms an immersive state of the pen tip 3, a protruding position where the pen tip 3 protrudes from the front end opening 1a of the exterior body 1, and a pen. The operation of moving a series of guide paths from the protruding state to the immersive state of the tip 3 will be described.
When the operating member 8 connected to the rear end of the writing tool main body 2 and protruding from the rear end opening 1b of the exterior body 1 is pressed, the writing tool main body 2 advances against the rearward urging force. The convex portion 7a of the rotor 7 at the retracted position in the window hole 1k advances in the window hole 1k by advancing the rotor 7 by advancing the writing tool main body 2 (FIG. 44). The convex portion 7a comes into contact with the first inclined wall 4d protruding from the back surface of the clip anti-base end portion 4b located in front (FIG. 45), and advances while pushing up the anti-base end portion of the clip 4 radially outward. do.
The convex portion 7a passes through the third inclined wall 4e along the top surface of the third inclined wall 4e, and further moves forward (FIG. 46). Then, the advanced convex portion 7a comes into contact with the second inclined wall 1o formed at the front end portion of the window hole 1k of the exterior body 1. The top portion of the first inclined wall 4d was formed on the surface 4l (front regulation surface top surface 4l) formed on the top of the front regulation surface 4k and the top of the third inclined wall 4e. The surface connected to the surface 4 m (the upper surface of the top surface of the third inclined wall 4 m), and the surface composed of the top portion of the first inclined wall 4d, the top surface of the front regulation surface 4 l, and the top surface of the third inclined wall 4 m is the second. It is located opposite the sloping wall lo. Therefore, the convex portion 7a in contact with the second inclined wall lo moves along the second inclined wall 1o, and at the same time, the top surface 7k of the convex portion 7a is in front of the top portion of the first inclined wall 4d. It moves along the surface consisting of the upper surface of the top surface of the regulation surface 4l and the upper surface of the top surface of the third inclined wall 4m, is guided in front of the engaging portion 1p for projecting the pen tip, abuts on the side wall of the wide portion 1n of the exterior body 1, and is convex. The forward movement of the writing tool main body 2 is completed by restricting the forward movement of the portion 7a (FIG. 47).
Here, when the pressure on the operating member 8 is released, the writing tool main body 2 urged rearward retreats along the axis of the writing tool main body 2. At this time, the rotor 7 also retracts at the same time as the writing instrument main body 2, and engages with the pen tip protruding engaging portion 1p, so that the pen tip 3 protrudes from the tip opening 1a of the exterior body 1. The operation from the retracted position to the protruding position of the convex portion 13a of the rotor 13 is completed (FIG. 48).
The upper surface of the top surface of the third inclined wall 4 m extends upward from the end of the upper surface of the top surface of the front regulation surface 4 l, and more specifically, it is formed from two inclinations having different inclination angles (FIG. 23). The inclination of the first half of the third inclined wall top surface 4m extending from the end of the front regulation surface top surface 4l (referred to as the step portion 4n) is steeply upward from the inclination of the second half portion (referred to as the inclination second half 4o). It is formed at an angle. Therefore, when the convex portion 7a passes through the step portion 4n, it vigorously moves downward and hits the inclined latter half 4on, which is the inclined portion of the latter half portion of the upper surface 4 m of the top surface of the third inclined wall, to generate an impact sound. The impact sound of the convex portion 7a passing through the step portion 4n serves to notify the completion of the pressing operation of the operating member 8.
However, even if the third inclined wall top surface 4 m is formed only by the inclination of the latter half portion without providing the step portion 4n, the pen tip can be projected only by eliminating the impact sound.
Further, when the pressing is released and the convex portion 7a retracts, the convex portion 7a is maintained in a state of being pressed toward the side wall of the wide portion 1n of the exterior body 1 by the inclination of the upper surface of the top surface of the third inclined wall 4 m. Therefore, the convex portion 7a can be more reliably engaged with the pen tip protruding engaging portion 1p.

Since the pen tip 3 changes from the protruding state from the tip opening 1a of the exterior body 1 to the immersive state, when the operating member 8 protruding from the rear end opening 1b of the exterior body 1 is pressed, the writing tool main body 2 that has moved forward is accompanied by the pen tip 3. The rotor 7 and the convex portion 7a of the rotor 7 also move forward.
A third inclined wall 4e formed on the back surface of the anti-base end portion 4b of the clip 4 is located in front of the convex portion 7a, and the convex portion 7a comes into contact with the third inclined wall 4e (FIG. 49). When the convex portion 7a further advances, the convex portion 13a moves in the circumferential direction along the third inclined wall 4e and comes into contact with the side surface of the first inclined wall 4d, and at the same time, the pressing protrusion 7h of the convex portion 7a is clipped. The forward movement of the writing tool main body 2 is completed by abutting on the front regulation surface 4k of 4 and restricting the forward movement of the convex portion 7a (FIG. 50).
Next, when the pressure on the operating member 8 is released, the writing tool main body 2 urged rearward retreats along the axis of the writing tool main body 2. At this time, the rotor 7 also retracts along with the writing tool main body 2, and the protrusion 7a retracts along the first inclined wall 4d and the regulation wall 4f, and hits the fourth inclined wall 1q formed on the exterior body. It touches (Fig. 51). Then, the convex portion 7a returns to the retracted position along the fourth inclined wall 1q.
The regulation wall 4f is provided at a position immediately before the pressing protrusion 7h of the convex portion 7a comes into contact with the front regulation surface 4k of the clip 4 and the forward movement of the writing tool main body 2 is completed. That is, when the top of the convex portion 7a comes into contact with and passes through the regulation wall 4f formed in the middle of the third inclined wall 4e, the convex portion 7a generates an impact sound due to the impact of the slightly lifted clip returning to its original position. Since the pressing protrusion 7h of the clip 4 comes into contact with the front regulation surface 4k of the clip 4, it serves to sensuously notify the user of the completion of the pressing operation. As a result, the user can be made aware of the completion of the pressing operation, which can lead to the release of the pressing on the operating member 8, and the knocking operation can be performed promptly.
However, since it is a sensory news, there is a possibility that it will suddenly exert excessive pressure due to the momentum. Therefore, in the present embodiment, the convex portion 7a comes into contact with the upper portion of the forward movement restricting surface 4k in the outer direction of the clip, and the pressing projection 7h of the convex portion 7a is formed in order to form an overcoming restricting portion on the lower portion of the forward movement restricting surface. Is configured to come into contact with the front regulation surface 4k formed at the end of the third inclined wall 4e at a position separated upward from the lower end of the front movement regulation surface. That is, the position separated upward from the lower end of the forward movement restricting surface corresponds to the upper part of the forward movement restricting surface 4k in the outer direction of the clip, and is located below the abutting position of the pressing protrusion 7h. The surface 4k corresponds to the overcoming regulation portion formed below the forward movement restriction surface. As a result, when the pressure is suddenly excessively pressed, the front regulation surface 4k of the clip 4 is deformed by the pressing projection 7h, and the pressing projection 7h bites into the front regulation surface 4k. When an excessive pressing force is suddenly applied, the connection part of the clip with the exterior body is fixed, so the tip of the clip moves upward from the exterior body in an attempt to release the forward force received from the convex portion. However, in order to prevent the pressing step portion 7f of the pressing protrusion 7h that bites into the clip from being pushed upward, the convex portion 7a becomes difficult to get over the front regulation surface 4k, and a reliable knock operation can be performed.
In this embodiment, since the front regulation surface 4k is inclined upward, the clip is pressed downward along the inclination at the moment when the pressing projection 7h comes into contact with the front regulation surface 4k. Since a force in the direction is generated, it is possible to make it more difficult for the convex portion 7a to get over the front regulation surface 4k. Further, since the front side surface 7e of the convex portion 7 of the clip is formed parallel to the inclination of the front regulation surface 4k, the pressing projection 7h comes into contact with the front inclined surface 4k, and the pressing projection 7h is all on the front inclined surface 4k. Since the front regulation surface 4k located below the contact portion and the front side surface 7e do not come into contact with each other until the bite, the pressing protrusion 7h can be surely bitten without interfering with the bite. Further, after the clip is completely bitten, the inclinations toward the front come into contact with each other to generate a force in the direction of pressing the clip downward, which further makes it difficult for the convex portion 7a to get over the front regulation surface 4k. Can be done. Further, if the upper side of the pressing protrusion 7h on the front side surface 7g of the pressing protrusion comes into contact with the front regulating surface 4k first, the contact amount of the pressing step portion 7f decreases when the pressing protrusion 7h bites into the front regulating surface 4k. In the example, the pressing step portion 7f is formed so as to extend vertically upward from the front end. For example, the inclination may be upward from the front end of the pressing step portion 7f toward the rear.
In this embodiment, the front inclined surface is formed as a flat surface, but the contact portion may be recessed from the beginning in anticipation of the amount of the pressing protrusion 7h biting into the surface.

In this embodiment, the first inclined wall 4d and the third inclined wall 4e are formed on the anti-base end portion 4b of the clip 4, but the rotor 7 is provided in the window hole 1k of the exterior body 1 instead of the clip 4. It can also be formed so as to be movable up and down by advancing the convex portion 7a of the above. By arranging the window hole 1k of the exterior body 1 so as to be covered by the clip 4, the window hole 1k can be hidden from the appearance, and the appearance is improved.
Further, in the present invention, the pen tip protruding engaging portion 1p is provided between the narrow portion 1m and the wide portion 1n of the window hole 1k of the exterior body 1, but the pen tip projecting engaging portion 1p is provided backward from the side edge portion of the wide portion 1n. It is also possible to form an engaging portion 1p for projecting the pen tip from the back surface of the anti-base end portion 4b of the clip so that the surface is inclined toward the side edge portion of the narrow portion.
In this case, when the clip 4 is lifted in the pen tip protruding state, the convex portion 7a of the rotor 7 engaged with the pen tip protruding engaging portion 1p formed on the back surface of the clip anti-base end portion 4b is disengaged. , It is possible to return to the retracted position by being guided by the inclined surface, and it is possible to form a so-called safety mechanism.

1 Exterior
1a Nib opening 1b Rear end opening 1c Bearing part 1d Receiving surface 1e Opening recess 1f Closure recess 1g Central protrusion 1h Opening stopper contact wall 1i Closure stopper contact wall 1j Inclined surface 1k Window hole 1m Narrow part 1n Wide Part 1o 2nd inclined wall 1p Engagement part for protruding pen tip 1q 4th inclined wall 1r Protrusion 1s Step part 1t Inclined surface 1u Engagement part for pen tip immersion 1v Guideway 1w Base mounting part 1A Bridging part 1B Joint part 1C Front engagement hole 1D Rear engagement hole 1E Blind wall 1F Protective wall 1G Fixing part 2 Writing tool body 2a Small diameter part 2b Large diameter part 2c Shoulder 2d Holding rib 2e Pen tip holding convex part 2f Rib 2g Concave curved surface 2h Chamfered part 2k Air groove 2l Protrusion 2m Recess 2n Short-legged C-shaped part 2o Long-legged C-shaped part 2r Anti-shake rib 2s Female screw part 2t Convex part 2u Gate part 3 Pen tip 3a Writing part 3b Connection part 3c step Part 3d Tapered part 4 Clip 4a Base end part 4b Anti-base end part 4c Coil spring holding protrusion 4d First sloping wall 4e Third sloping wall 4f Restriction wall 4g Through hole 4h Slit 4i Protrusion 4j Coil spring press-fitting part 4k Forward regulation Surface 4l Front regulation surface Top surface 4m 3rd sloped wall top surface 4n Stepped top surface 4o Tilt second half 5 Base 5a Front engagement protrusion 5b Rear engagement protrusion 5c Claw 5d Claw 5e Protrusion 5f Protrusion 5g Contact surface 5h Inclined step 5i Inclined step 6 Coil spring 7 Rotator 7a Convex part 7b C-shaped part 7c Narrow extension part 7d Rear inclined surface 7e Front side surface 7f Pressing step part 7g Pressing protrusion Front side surface 7h Pressing protrusion 7i Flat part 7j recess 7k top surface 8 operating member 8a knock part 8b insertion part 8c male screw part 8d contact part 8e rib 8f taper part 8g receiving rib 8h recess 8i step part 9 lid body 9a lid part 9b side wall part 9c Protrusion 9e Outer cam part 9f Open cam protrusion 9g Concave cam part 9h Opening stopper 9i Closure stopper 9j Inner cam part 9k Cam surface 9l Notch 9m Head 9n Recess 9o Beam 10 Annular elastic body 11 Coil spring 12 Ankle elastic body 12a Outer Sealing rib 12b Outer tilt prevention rib 12c Inner sealing rib 12d Step 12e Receiving groove 13 Ring member 13a Connection 13b Side wall 13c Contact surface 13d Protrusion 13e Middle hole 13f Step 14 Ink occlusion 15 Pen tip holder 15a Press-fit fixing part 15b Step 15c Groove

Claims (4)

By engaging the convex portion arranged on the side of the writing tool body having a pen tip at the tip with the exterior body as the writing tool body moves back and forth by operation, the pen tip appears and disappears from the tip opening of the exterior body. It is a retractable writing tool that locks, and the convex portion is engaged with an engaging portion formed on the inner portion of a clip formed in a protruding state from the side portion as a part of the exterior body. In the thing, of the forward movement restricting surface of the convex portion formed on the inner portion of the clip, the portion that contacts the convex portion is made a concave portion, and / or the surface is pressed against the convex portion. The familiar portion is used as the contact portion, and the lower portion in the outer direction of the clip from the concave portion protrudes from the concave portion toward the convex portion side, and / or the lower portion in the outer direction of the clip from the contact portion has frictional resistance from the contact portion. A haunting writing tool that forms a large, overcoming regulation section. The haunting type writing tool according to claim 1, wherein the forward movement restricting surface is an inclined surface that faces forward toward the outside of the clip. The appearance according to claim 1 or 2, wherein a pressing protrusion protruding from the front side surface is formed on the convex portion, and the front side surface of the pressing protrusion abuts on the convex portion to form the concave portion and / or the abutting portion. Type writing tool. The infestation type writing tool according to claim 3 , wherein the front side surface of the convex portion, the lower portion in the outward direction of the clip from the pressing protrusion is an inclined surface that faces forward toward the outer side of the clip.

Images