JP2006130800A - Writing implement having clip member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a writing implement having a clip member which has a simple structure and easiness to assemble and from which a coil spring does not separate simply. <P>SOLUTION: The writing implement has the clip member of which the fore-end inner wall part is always repelled to the outer wall surface side of a tube body by a coil spring provided between the clip member and the tube body and also is made separable from the tube body, with the connecting part of the clip member and the tube body made a fulcrum. A projecting part extending toward the tube body side is formed on the bottom wall of the clip member and a projecting part extending toward the clip side is formed on the outer wall of the tube body, while seat coil parts are formed at the opposite ends of the coil spring and the coil spring is so provided as to cover the projecting part of the clip member and that of the tube body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a writing instrument having a clip member, and more specifically, a writing instrument having a clip member that constantly repels the inner wall of the tip of the clip member toward the outer wall surface of the cylinder, and the inner wall of the clip member can be separated from the cylinder About.

2. Description of the Related Art Conventionally, a writing instrument having a clip member that constantly repels the inner wall portion of the clip member toward the outer wall surface of the cylinder and can separate the inner wall portion of the clip member from the cylinder is well known. In a writing instrument having such a clip member, a coil spring is used as a resilient member as disclosed in Japanese Utility Model Laid-Open No. 55-148990 “Clip Device for Writing Tool” and Japanese Utility Model Laid-Open No. 56-159283 “Clip Device for Writing Tool”. The structure used is also well known.
“Japanese Utility Model Publication No. 55-148990” "Japanese Utility Model Publication No. 56-159283"

  In the writing instrument using the coil spring described above, since the coil spring bends due to the tilting of the clip member, the coil spring is not easily detached from the cylinder or the clip member due to repeated use or impact. Moreover, in order to make the arrangement position of a coil spring accurate, the recessed part which arrange | positions a coil spring in the cylinder and / or a shaft cylinder is formed.

  However, only by disposing the coil spring in the cylindrical body and / or the shaft cylinder, the coil spring is operated by pressing the rear end portion of the clip member to move the inner end of the clip member away from the cylindrical body. There was a possibility that the coil spring would come off and the coil spring would come off.

  In order to deal with such a problem, a method of increasing the depth of the concave portion is conceivable. However, since it is necessary to increase the thickness of the clip member and the cylindrical body, the cost is increased and the design width is narrowed. In addition, a method of inserting a coil spring into the cylinder as in the above-described prior art is also conceivable, but the problem is that the structure becomes complicated, the assemblability becomes complicated, and a space for inserting the coil spring needs to be provided. was there.

  An object of the present invention is to provide a writing instrument having a clip member that is simple in structure and easy to assemble, and in which a coil spring does not easily come off.

  According to the present invention, the coil spring disposed between the clip member and the cylindrical body always repels the inner wall portion at the tip of the clip member toward the outer wall surface of the cylindrical body, and the connection portion between the clip member and the cylindrical body as a fulcrum. And a writing instrument having a clip member in which a tip inner wall portion of the clip member can be separated from the cylinder with respect to the cylinder, the protrusion extending toward the cylinder side on the bottom wall of the clip member, and the cylinder A protrusion extending toward the clip side is formed on the outer wall of the coil spring, and a winding end is formed at both ends of the coil spring, and the coil spring is arranged so as to cover the protrusion of the clip member and the protrusion of the cylindrical body. Set up.

  Further, the height of the protrusion extending toward the cylinder side on the bottom wall of the clip member is M1, the height of the protrusion extending toward the clip side on the outer wall of the cylinder is M2, and the end winding portion of the coil spring When the height of N is N, the relationship of M1 <N and M2 <N is satisfied.

  Further, the tip inner wall portion of the clip member is pivoted on the tip end surface of the projection extending toward the cylinder side on the bottom wall of the clip member and / or the tip end surface of the projection extending toward the clip side on the outer wall of the cylinder body. A stopper portion for restricting the subsequent separation operation is provided by an operation of separating from the cylinder.

  It was possible to provide a writing instrument having a clip member that has a simple structure and is easy to assemble and that does not easily come off a coil spring.

  Next, examples of the writing instrument having a clip member of the present invention will be described with reference to the drawings, but the present invention is not limited to the following examples.

  A writing instrument 1 having a clip member shown in FIG. 1 to FIG. 5 includes a projection 5 extending toward the clip member 3 provided on the outer wall of the rear end portion of the shaft cylinder 2, and a shaft cylinder provided on the inner wall of the clip member 3. By arranging the coil spring 4 so as to cover the protrusion 6 extending toward the second side, the tip inner wall 3a of the clip member 3 is always elastically attached to the outer wall 2a side of the shaft cylinder 2. . Further, by pressing the rear end portion 3b of the clip member 3 (in the direction of arrow F1 in FIGS. 1 and 2), the connecting wall R1 between the clip member 3 and the shaft tube 2 serves as a fulcrum, and the tip inner wall portion of the clip member 3 3 a can be separated from the outer wall surface 2 a of the shaft cylinder 2.

  The connecting portion R1 between the clip member 3 and the shaft tube 2 is formed with an engagement hole 9 in both side wall surfaces 3c of the clip member 3 formed in a substantially U shape, and the clip member 3 is attached to the support column 8 extending from the shaft tube 2. In this structure, an engagement protrusion 8 that faces the engagement hole 9 is formed, and the engagement protrusion 8 is engaged with and engaged with the engagement hole 9. By forming the clip member 3 in a substantially U shape, it is possible to prevent the coil spring 4 from being bent on the side wall surface 3c side of the clip member 3. Further, by the operation of separating the tip inner wall portion 3a of the clip member 3 from the shaft cylinder 2, the bottom surface 3d of the side wall 3c of the clip member 3 comes into contact with the outer wall 2a of the shaft cylinder 2, and the subsequent separation operation is restricted.

  In the present invention, the coil spring 4 is disposed so as to cover the protrusions 5 and 6, but it is not necessary to increase the thickness of the other portions of the clip member 2 and the shaft tube 2, which increases the cost. It can be suppressed as much as possible, and the width of the design can be expanded. Further, since the coil spring 4 is used as the resilient member, it is easy to make both ends have the same shape, the assembling work is easy, and the tip inner wall portion 3a of the clip member 3 is separated from the outer wall surface 2a of the shaft tube 2. Even if the coil spring 4 is compressed by repeating the above operation, the coil spring 4 is not easily deformed, so that the elastic force of the tip inner wall portion 3a of the clip member 3 toward the outer wall surface 2a of the shaft cylinder 2 does not change.

  Further, the writing instrument having the clip member of the present invention has a structure in which the coil spring 4 is disposed between the shaft tube 2 and the clip member 3, so that the conventional structure in which the coil spring 4 is disposed in the shaft tube 2 is employed. Although it is easier to assemble and unnecessary space is not required, it is not shown in the figure, but is particularly effective for a writing instrument having a feeding mechanism in the shaft tube 2.

  Since the coil spring 4 has end winding portions 4a at both ends, the rear end portion 3b of the clip member 3 is pressed (in the direction of arrow F in FIG. 1) so that the tip inner wall portion 3a of the clip member 3 is Even if the coil spring 4 is bent due to being separated from the shaft cylinder 2, the end winding portions 4 a at both ends are not easily deformed, and thus are not easily detached from the protrusions 5 and 6.

  Further, when the height of the protrusion 5 of the shaft tube 2 is M1, the height M2 of the protrusion 6 of the clip member 3, and the height of the end turn 4a of the coil spring 4 are N1 and N2 (N1 = N2). By satisfying the relationship of M1 <N1 and M2 <N2, the heights N1 and N2 of the end turn 4a that are difficult to deform are longer than the heights M1 and M2 of the protrusions 5 and 6, so that the coil spring 4 The coil spring 4 is deformed so that the coil portion 4b and the projections 5 and 6 do not interfere with each other, and the elastic force of the coil spring 4 and the operability of the clip member 3 are affected. This is preferable because of In addition, the coil spring 4 can be easily disposed because the end winding portion 4a which is not easily deformed is disposed so as to cover the protrusions 5 and 6.

  The writing instrument 11 having the clip member shown in FIGS. 6 to 9 has a stopper portion 20 on the front end surface of the projection 15 extending toward the clip member 13 on the outer wall 12a of the shaft cylinder 12, and a shaft on the bottom wall of the clip member 13. A stopper portion 21 is formed on the tip surface of the protrusion 16 extending toward the tube 12 side, and the tip inner wall portion 13a of the clip member 13 is protruded from the shaft tube 12 by an operation of separating from the shaft tube 12. The stopper portion 21 was provided on the outer wall of the rear end portion of the shaft tube 12 in the same manner as in Example 1 except that the stopper portion 21 abutted on the protrusion portion 16 of the clip member 13 was brought into contact with the stopper portion 20 and the subsequent separation operation was restricted. By arranging the coil spring 4 so as to cover the protrusion 15 extending toward the clip member 13 and the protrusion 16 extending toward the shaft tube 12 provided on the inner wall of the clip member 13, The tip inner wall portion 13a of the member 13, are annexed originates always elastically on the outer wall surface 12a side of the barrel 12. Further, by pressing the rear end portion 13b of the clip member 13 (in the direction of arrow F2 in FIGS. 6 and 7), the connecting portion R2 between the clip member 13 and the shaft cylinder 12 is used as a fulcrum, and the tip inner wall portion of the clip member 13 is used. 13 a can be separated from the outer wall surface 12 a of the shaft cylinder 12.

  Similarly to the first embodiment, the connecting portion R2 between the clip member 13 and the shaft cylinder 12 is formed with an engagement hole 19 on both side wall surfaces 13c of the clip member 13 formed in a substantially U shape, and extends from the shaft cylinder 12. The strut 18 is formed with an engaging protrusion 18 that opposes the engaging hole 19 of the clip member 13, and the engaging protrusion 18 is engaged with and engaged with the engaging hole 19.

  A stopper 20 is provided on the front end surface of the protrusion 15 extending toward the clip member 13 on the outer wall 12a of the shaft cylinder 12, and a stopper is provided on the front end surface of the protrusion 16 extending toward the shaft cylinder 12 on the bottom wall of the clip member 13. Since the maximum separation distance between the tip inner wall portion 13a of the clip member 13 and the shaft cylinder 12 can be easily set by adjusting the height of the stopper portions 20, 21 by forming the portion 21, the clip member Compared to the structure in which the outer wall of 13 is in direct contact with the shaft cylinder 12 to control the separation operation, the design width of the clip member 13 can be expanded, and even if wear or damage occurs due to repeated use, This is preferable because it does not affect the process.

  In the present embodiment, for convenience, a shaft cylinder is used as the cylinder, but a structure in which the cylinder is a cap and a clip member is attached to the cap may be used. In addition, the connecting portion between the clip member and the cylindrical body is engaged with an engagement hole formed on both side surfaces of the clip member and a protrusion formed on the shaft tube and facing the engagement hole of the clip member. There is no particular limitation as long as it is a structure that can support the connecting portion between the clip member and the cylinder and the tip inner wall portion of the clip member can be separated from the shaft cylinder, and a spherical protrusion formed on the cylinder or the clip member. The engagement between the portion and the recess facing the R-shaped protrusion formed on the clip member or the cylinder can be selected as appropriate.

  The shape of the protrusion of the clip member and the protrusion of the shaft tube are not particularly limited, and a taper shape, an R shape, or the like is appropriately selected as long as it does not interfere with the coil spring while being in contact with the shaft tube. be able to. Further, the shape of the stopper portion is not particularly limited and can be selected as appropriate. In the embodiment, the stopper portion protrudes from both the protruding portion of the clip member and the protruding portion of the shaft tube. Either one may be used.

  Can be implemented without being limited to the type of ink, such as low-viscosity oil-based ink, shear thinning ink, water-based ink, etc., and not limited to the shape and material of the writing tip, widely used as a writing instrument such as a cap type, knock type It can be implemented.

It is the longitudinal cross-sectional view which abbreviate | omitted partially which shows the writing instrument which has a clip member of Example 1. FIG. It is a figure which shows the state which spaced apart the front-end | tip inner wall part of the clip member in FIG. 1 from the axial cylinder. It is an external view in FIG. It is A1-A1 expanded sectional view in FIG. It is B1-B1 expanded sectional drawing in FIG. It is the longitudinal cross-sectional view which abbreviate | omitted partially which shows the writing instrument which has a clip member of Example 2. FIG. It is a figure which shows the state which spaced apart the front-end | tip inner wall part of the clip member in FIG. 6 from the axial cylinder. It is A2-A2 expanded sectional drawing in FIG. It is B2-B2 expanded sectional view in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Writing instrument which has a clip member 2,12 Shaft cylinder 3,13 Clip member 3a, 13a Front inner wall part 3b, 13b Rear end part 4 Coil spring 4a Seat winding part 4b Coil part 5,15 Protrusion part 6,16 Protrusion part 7, 17 Strut 8, 18 Engagement protrusion 9, 19 Engagement hole 20, 21 Stopper part R1, R2 Connection part M1, M2 Height of protrusion N1, N2 Height of end winding part

Claims (3)

A coil spring disposed between the clip member and the cylindrical body constantly repels the tip inner wall portion of the clip member toward the outer wall surface side of the cylindrical body, and a connecting portion between the clip member and the cylindrical body as a fulcrum. The clip member has a clip member that allows the inner wall portion of the tip of the clip member to be separated from the cylinder, and a protrusion that extends toward the cylinder side on the bottom wall of the clip member, and a clip on the outer wall of the cylinder A projecting portion extending toward the side, end winding portions are formed at both ends of the coil spring, and the coil spring is disposed so as to cover the projecting portion of the clip member and the projecting portion of the cylindrical body. A writing instrument having a clip member as a feature. The height of the protrusion extending toward the cylinder side on the bottom wall of the clip member is M1, the height of the protrusion extending toward the clip side on the outer wall of the cylinder is M2, and the height of the end winding portion of the coil spring The writing instrument having a clip member according to claim 1, wherein when N is N, the relationship of M1 <N and M2 <N is satisfied. The tip inner wall of the clip member extends from the shaft tube to the tip end surface of the projection extending toward the cylinder side on the bottom wall of the clip member and / or the tip end surface of the projection extending toward the clip side on the outer wall of the cylinder body. The writing instrument having a clip member according to claim 1 or 2, wherein a stopper portion for restricting the subsequent separation operation is provided by the separation operation.

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