JP2019010859A - Clip structure for writing instrument and writing instrument with the same - Google Patents

Abstract

To provide a clip structure for a writing instrument which realizes a suitable clip function without easily disengaging a clip in a writing instrument.SOLUTION: A clip structure S1 for a writing instrument comprises a projecting portion 12 provided on a barrel 10 side and a clip 30 having an opening 32 fitted to the projecting portion 12. In the clip structure S1, the clip 30 has a notch 33 at the edge on the surface side of the opening 32 which is the opposite side to the back surface side of the opening 32 into which the projecting portion 12 is inserted. A rotation fulcrum P1 of the clip, which is defined by a part of an inner surface 32a of the opening 32 of the clip 30 and a part of an outer surface 12a of the projecting portion 12 when the clip 30 is lifted, is formed at a position lower than the height of a top face 12b of the projecting portion 12 by the notch 33.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a clip structure for a writing instrument and a writing instrument including the clip structure.

  Patent Document 1 discloses a writing instrument cap in which a cap body and a clip are separately formed. In this writing instrument cap, the hole of the clip is fitted to the projecting portion provided on the outer periphery of the cap body to constitute a writing instrument cap with a clip function.

JP 2000-318374 A

  In the clip structure described in Patent Document 1, the hole of the clip is fitted to the protruding portion of the cap body, and the clip does not come off the cap body when the clip is not moved. However, for example, if the tip of the clip is lifted and paper or the like is sandwiched between the clips, the clip may come off from the cap body (protrusion). Similarly, when something comes into contact with the rear end of the clip, the clip may be detached from the cap body (protruding portion).

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a clip structure for a writing instrument in which a clip cannot be easily detached, and a writing instrument including the clip structure.

  In order to solve the above-mentioned problem, the present inventor has intensively studied. In the clip structure described in Patent Document 1, the rotation fulcrum of the clip when lifting the clip is positioned at substantially the same height as the top surface of the protrusion. I found out. For this reason, when there is a rotation due to the lifting operation or the like of the clip, as shown in FIG. It has been found that this can cause the clip to easily disengage from the protrusion. Therefore, the present inventor has further studied and obtained the knowledge that the clip can be easily prevented from coming off the protruding portion by providing a simple configuration that can tolerate such slip to some extent. It came to completion.

  That is, the clip structure for a writing instrument according to the present invention includes a protrusion provided on the writing instrument main body side and a clip having an opening that fits into the protrusion, and the clip has an opening into which the protrusion is inserted. It has a notch on the edge of the inner surface on the surface side of the opening opposite to the back side, and is defined by a part of the inner surface of the opening of the clip and a part of the outer surface of the protrusion when the clip is lifted The rotation fulcrum of the clip is formed at a position lower than the top surface height of the protrusion by the notch.

  In this clip structure for writing instruments, a notch is provided in the edge of the inner surface on the surface side of the opening of the clip that fits into the protruding portion, and this notch provides a part of the inner surface of the opening of the clip when the clip is lifted. And a rotation fulcrum of the clip defined by a part of the outer surface of the projecting portion is formed at a position lower than the height of the top surface of the projecting portion. For this reason, according to this clip structure, even if the clip slips to the outside from the protruding portion to some extent, the clip can be prevented from coming off the protruding portion. In addition, since there is an allowance for such slip, this clip structure can provide a more suitable clip function (with a wider rotation range). The “writing instrument body” as used herein can be exemplified by a shaft that constitutes the writing instrument, a cap that covers the tip of the writing instrument, etc., but is not limited thereto, and is a writing instrument to which a clip can be attached. Various parts can be included.

  In the above-described clip structure for a writing instrument, the notch is preferably a stepped portion or an inclined portion. In this case, a structure for preventing the clip from coming off from the protruding portion can be easily realized.

  In the above-described clip structure for a writing instrument, it is preferable that the notch is provided on one end side in the longitudinal direction of the clip among the edges of the inner surface of the opening. In this case, a general clip function by a rotating operation along the longitudinal direction of the writing instrument can be easily realized. Moreover, the notch may be provided in the both ends in the longitudinal direction of a clip among the edges of the inner surface of an opening.

  In the above-mentioned clip structure for a writing instrument, it is preferable that the depth of the notch protrusion from the top surface is 10% or more with respect to the height of the protrusion. When the depth of the notch is 10% or more of the height of the protruding portion, it is possible to prevent the clip from easily coming off even if the clip slides on the protruding portion. In addition, you may make it the said depth of a notch become 40% or less of the height of a protrusion part. In this case, the thickness of the part that defines the opening of the clip becomes thin due to the notch, so that the strength of the clip decreases or the durability when continuously used decreases. Can be prevented.

  In the above-described clip structure for a writing instrument, the protruding portion has a restricting portion provided on the top surface side of the protruding portion with respect to the rotation fulcrum, and the restricting portion moves relative to the protruding portion in a direction away from the writing instrument body. You may make it regulate. In this case, in addition to the function of preventing the clip from coming off due to the rotation of the clip, it is possible to prevent the clip from coming off due to the operation of lifting the clip vertically or obliquely (away) from the writing instrument body. It can be surely prevented.

  In the above-described clip structure for a writing instrument, the restricting portion may be a protruding portion that protrudes from the outer surface of the protruding portion toward the notch. In this case, it is possible to realize prevention of clip detachment by an operation of lifting the writing instrument main body vertically or obliquely with a simple structure. In this case, the protrusion amount of the protrusion with respect to the outer surface of the protrusion may be greater than 0.1 mm and not greater than 0.4 mm. When the protruding amount of the convex portion is within this range, the clip can be easily attached to the protruding portion in the writing tool assembling process while preventing the clip from being detached from the protruding portion.

  Moreover, this invention can also be grasped | ascertained as a writing instrument provided with the clip structure for writing instruments which has one of the said structures as another side surface. According to such a writing instrument, a writing instrument having a more suitable clip function can be realized as described above.

  ADVANTAGE OF THE INVENTION According to this invention, the writing instrument clip structure provided with the clip structure for writing instruments which the clip in a writing instrument cannot remove easily, and the said clip structure can be provided.

FIG. 1 is a perspective view showing an example of a writing instrument according to an embodiment of the present invention. FIG. 2 is a partially exploded perspective view showing a state where a clip is removed from the writing instrument shown in FIG. 1. FIG. 3 is a cross-sectional view showing a cross section of the clip of the writing instrument shown in FIG. 1. FIG. 4A is a schematic cross-sectional view showing the operational effect of the clip structure according to the present embodiment, and FIG. 4B is a schematic cross-sectional view showing the operation in the conventional clip structure. Fig.5 (a) is sectional drawing which shows the clip structure which concerns on a modification, FIG.5 (b) is sectional drawing which shows the clip structure which concerns on another modification. FIG. 6 is a perspective view showing a writing instrument according to a modification. FIG. 7 is a partially exploded perspective view showing a state where the clip is removed from the writing instrument shown in FIG. 6. FIG. 8 is an enlarged view showing the protrusion shown in FIG. 9 is a cross-sectional view showing a cross section of the clip structure of the writing instrument shown in FIG.

  Hereinafter, a writing instrument clip structure according to the present invention and a writing instrument provided with the clip structure will be described with reference to the drawings. In the description, the same reference numerals may be used for the same elements or elements having the same function, and redundant description is omitted.

  First, an example of a writing instrument having a clip structure according to the present invention will be described. Examples of writing tools to which the present invention can be applied include various writing tools such as mechanical pencils, ballpoint pens, marking pens, and sign pens, but are not limited thereto. The following description will be made by taking an example of an in / out type marking pen, but the present invention can be similarly applied to other various writing instruments.

  FIG. 1 is a perspective view showing an example of a writing instrument according to an embodiment of the present invention. As shown in FIG. 1, the writing instrument 1 is a retractable marking pen, and is provided with a shaft tube 10, which can be moved forward and backward in the shaft tube 10, and has a writing portion at the front end side (the upper right side in the drawing). ) And the clip unit 30 attached to the protruding portion 12 provided on the rear end side of the shaft tube 10. The writing part of the core unit 20 is a part containing ink or the like. By pushing the knock part 22 from the upper right side in the figure to the lower left side, the writing part protrudes and disappears from the tip opening 14 of the shaft tube 10, marking, etc. Is configured to be performed. The configuration of such a marking pen itself will be apparent to those skilled in the art as described in, for example, Japanese Patent Application Laid-Open No. 2006-055576, and a detailed description thereof is omitted here.

  FIG. 2 is a partially exploded perspective view showing a state where a clip is removed from the writing instrument shown in FIG. 1. As shown in FIG. 2, the clip 30 of the writing instrument 1 has an opening 32, and the protruding portion 12 of the shaft tube 10 is fitted into the opening 32, so that the clip 30 is attached to the shaft tube 10. The clip 30 is formed by molding, for example, from plastic resin or the like, and the shaft cylinder 10 is centered on a contact area between the outer surface 12a of the projecting portion 12 and a portion constituting the opening 32 (the inner surface 32a, see FIG. 3). It is possible to rotate in a direction away from (upward) the clip 30, and to perform a function of lifting one end (tip side) 37 of the clip 30 and sandwiching paper or the like therebetween.

  FIG. 3 is a cross-sectional view showing a cross section of the clip of the writing instrument shown in FIG. 1. As shown in FIG. 3, the clip 30 more specifically includes a substantially plate-like clip body 31, a substantially rectangular opening 32 provided on the rear end side of the clip body 31, and a surface 30 a side of the opening 32. A step portion 33 (notch) provided at the edge of the inner side surface 32 a, a recess 34 provided on the back surface 30 b side slightly in front of the opening 32, and a protrusion 35 provided on the back surface 30 b side in front of the clip body 31 , And is configured. As described above, the stepped portion 33 is provided at the edge of one end in the longitudinal direction of the opening 32 of the clip 30. Even when the protruding portion 12 is fitted into the opening 32, the stepped portion 33 A region R that does not contact the outer surface 12a of the protrusion 12 is formed on the inner surface 32a of the opening 32 on the surface 30a side. The protrusion 12 is inserted and fitted from the back surface 30b side of the opening 32, for example. Note that the depressions 34 make the clip 30 more easily bent, and the projections 35 can more reliably hold what is sandwiched between the clips 30.

  Here, with reference to FIG. 4, the effect by such a level | step-difference part 33 is demonstrated, comparing with the conventional structure. FIG. 4A is a schematic cross-sectional view showing the operational effect of the clip structure according to the present embodiment, and FIG. 4B is a schematic cross-sectional view showing the operation in the conventional clip structure. As shown in FIG. 4B, there is no notch such as a step on the edge of the surface 130a of the opening 132 (inner surface 132a) of the conventional clip 130, and the clip 130 is lifted (rotated). Then, the rotation fulcrum P2 is formed at a position substantially flush with the top surface 112b of the outer surface 112a of the protruding portion 112. For this reason, in the conventional clip structure S2, when the rotation by the lifting operation of the clip 130 exceeds a certain angle, the edge of the opening 132 of the clip 130 that forms the rotation fulcrum P2 becomes the protrusion 112 (the rotation fulcrum P2). It is possible that the clip 130 is easily slipped outward from the corresponding region), so that the clip 130 can be easily detached from the protruding portion 112.

  On the other hand, as shown in FIG. 4A, according to the clip structure S <b> 1 according to the present embodiment, a step is formed on the edge of the inner side surface 32 a on the surface 30 a side of the opening 32 of the clip 30 fitted to the protruding portion 12. A portion 33 is provided, and the stepped portion 33 forms a rotation fulcrum P <b> 1 when the clip 30 is lifted by a sandwiching operation by the clip 30 at a position (inner side) lower than the top surface 12 b of the protruding portion 12. For this reason, according to this clip structure S1, even if the clip 30 slides to some extent with respect to the projecting portion 12 in order to lift (rotate) the clip 30, the clip 30 is detached from the projecting portion 12. Can be prevented. And since it has the tolerance with respect to such a slip, according to the writing instrument 1 which has clip structure S1, it becomes possible to show | play a more suitable (wider rotation range) clip function.

  In addition, in the writing instrument 1 provided with the clip structure S1, the depth D from the top surface 12b of the protruding portion 12 of the stepped portion 33 is not limited to this, but is 10% or more with respect to the height T of the protruding portion 12 40 % (See FIG. 3). For example, when the height T of the protrusion 12 is 5 mm, the depth D of the step 33 can be 1 mm. As described above, when the depth D of the stepped portion 33 is 10% or more of the height T of the protruding portion 12, it is possible to prevent the clip 30 from coming off easily even if the clip 30 slides with respect to the protruding portion 12. . On the other hand, by setting the depth D of the step portion 33 to 40% or less of the height T of the protruding portion 12, the thickness of the portion 36 that defines the opening 32 of the clip 30 becomes thin due to the step portion 33. Further, it is possible to prevent the strength of the clip 30 from being lowered or the durability when continuously used from being lowered.

  Further, in the writing instrument 1 having the clip structure S1, the stepped portion 33 has been described as an example of the notch provided on the surface 30a side of the opening 32 of the clip 30, but the surface 30a between the opening 32 of the clip 30 and the protruding portion 12 is described. If it is a structure which can move the contact point (namely, rotation fulcrum) of the side to the inner side rather than the top | upper surface 12b of the protrusion part 12, an inclined part may be sufficient. By adopting such a stepped portion or an inclined portion, a structure for preventing the clip 30 from coming off the protruding portion 12 can be easily realized.

  Further, in the writing instrument 1 having the clip structure S <b> 1, the stepped portion 33 is provided only on the distal end side in the longitudinal direction of the clip 30 in the edge of the opening 32. In this case, a general clip function by a rotating operation along the longitudinal direction of the writing instrument 1 can be easily realized.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment, It can apply to various embodiment. For example, in the above-described embodiment, the top surface 12b of the protruding portion 12 and the surface 30a of the clip 30 substantially coincide with each other. However, as shown in FIG. The structure may be recessed inward from the surface 30a. In the clip structure S3, the clip 30 defined by the notch 33 of the clip 30 is defined by a part of the inner surface of the opening 32 of the clip 30 and a part of the outer surface 16a of the protrusion 16 when the clip 30 is lifted. 30 rotation fulcrums P1 are formed at a position lower than the top surface 16b of the protruding portion 16 by the notch 33, and are difficult to come off.

  Moreover, in the said embodiment, although the notch 33 was provided in the one end (front-end | tip) side of the edge part of the clip 30, as shown in FIG.5 (b), each notch is provided in the both ends of the edge part of the clip 30, respectively. 33 and 38 may be provided. In this clip structure S4, in addition to the above-described clip function, even when something hits the other end (rear end) of the clip and the clip rotates on the rear end side, the same effect as described above can be obtained. It is also possible to suppress the cap from being removed. In the example shown in FIG. 5B, only the rear end side cutout 38 may be provided without providing the front end side cutout 33.

  Moreover, although the said embodiment demonstrated the example in which the protrusion part 12 fitted to the opening 32 of the clip 30 was provided in the axial cylinder 10 corresponded to a writing instrument main body, this cap 12 corresponding to this writing instrument main body is used. The clip structure S1 described above may be formed in the cap of the writing instrument, or the same configuration may be provided in the other writing instrument portions.

  Here, a modified example of the above embodiment will be described with reference to FIGS. As shown in FIG. 6, the writing instrument 1 </ b> A according to the modified example has the same basic configuration as the writing instrument 1 described above, and includes a shaft cylinder 10, a core unit 20, and a clip 30. 33 is provided to prevent the clip 30 from coming off the protrusion 17 due to the rotation. In addition to this, the writing instrument 1A is different from the writing instrument 1 in that it further includes a function of preventing the clip 30 from coming off by lifting the clip 30 in the vertical direction or the oblique direction S (see FIG. 9). Yes. Hereinafter, differences will be mainly described.

  In the writing instrument 1A, as shown in FIGS. 7 and 8, the outer surface 17a of the projecting portion 17 of the shaft tube 10 is further provided with a convex portion 17e (regulating portion). The lifting of the clip 30 in the vertical direction or the oblique direction from the outer surface is controlled. The convex portion 17e protrudes from the outer surface 17a of the protruding portion 17 in a circular arc shape or a hemispherical shape, for example. Moreover, the convex part 17e is extended along the transversal direction of the protrusion part 17, and is provided in the center of the transversal direction of the outer surface 17a. The width of the convex portion 17e in the short side direction can be, for example, a width between half and the full width of the side wall 17A of the protruding portion 17.

  Further, as shown in FIG. 9, the convex portion 17e is provided in a region corresponding to the stepped portion 33 on the top surface 17b side of the projecting portion 17 with respect to the rotation fulcrum P1 in relation to the clip 30. It protrudes from the outer surface 17a toward the stepped portion 33. For this reason, the convex part 17e is caught by the lower end of the level | step-difference part 33 in the direction away from the axial cylinder 10, when raising the clip 30 to the diagonal direction S (or vertical direction). Thereby, the convex part 17e restrict | limits the relative movement to the direction which leaves | separates from the axial cylinder 10 of the clip 30 with respect to the protrusion part 17. FIG. The protruding amount of the convex portion 17e from the outer surface 17a may be, for example, in a range of greater than 0.1 mm and not greater than 0.4 mm, and more preferably in a range of not less than 0.2 mm and not greater than 0.3 mm. In addition, the convex part 17e may be provided adjacent to the rotation fulcrum P1.

  According to the writing instrument 1A having such a configuration, when the clip 30 is lifted, the relative movement of the clip 30 in the direction away from the shaft tube 10 with respect to the protruding portion 17 is restricted, so that the clip 30 is detached from the protruding portion 17. Can be prevented more reliably. Further, by setting the protruding amount of the convex portion 17e to 0.3 mm or less, the clip 30 can be easily attached to the protruding portion 17 by pressing the clip 30 toward the axial tube 10 in the assembly process of the writing instrument 1A. .

  In the writing instrument 1A, as shown in FIG. 8, the rib 17d of the protruding portion 17 may be configured to have portions 17f and 17g that are spaced apart from the side walls 17A and 17B of the protruding portion 17, respectively. In this case, since the space | interval area | region is provided between side wall 17A and 17B, and the rib 17d, when forming the axial cylinder 10 containing the protrusion part 17 by shaping | molding, generation | occurrence | production of the sink in the rib 17d can be suppressed. This facilitates dimensional management of the central portion of the rib 17d. Moreover, in the writing instrument 1A, as shown in FIG. 8, unlike the writing instrument 1, the width of the intermediate portion 17C of the protruding portion 17 may be configured to be smaller than the width of the side walls 17A and 17B. The width of the portion 17C may be approximately the same as the thickness of the side walls 17A and 17B. Thereby, the occurrence of sink marks in the intermediate portion 17C can be suppressed, and the size management of the intermediate portion 17C can be facilitated.

  DESCRIPTION OF SYMBOLS 1,1A ... Writing instrument, 10 ... Shaft cylinder (writing instrument main body), 12, 16, 17 ... Projection part, 12a, 16a, 17a ... Outer surface, 12b, 16b, 17b ... Top surface, 14 ... Tip opening, 17d ... Rib , 17e ... convex portion, 20 ... center unit, 22 ... knocking portion, 30 ... clip, 30a ... front surface, 30b ... back surface, 31 ... clip main body, 32 ... opening, 32a ... inner side surface, 33 ... stepped portion (notch ), 34... Depression, 35... Projection, 36... D, Depth of step, P 1, P 2 Rotation fulcrum, S 1, S 2, S 3, S 4.

Claims (8)

A clip structure for a writing instrument comprising a protrusion provided on the writing instrument main body side and a clip having an opening that fits into the protrusion,
The clip has a notch on the edge of the inner surface on the surface side of the opening that is opposite to the back surface side of the opening into which the protrusion is inserted;
When the clip is lifted, a pivot point of the clip defined by a part of the inner side surface of the opening of the clip and a part of the outer side surface of the projecting part is defined by the notch. A clip structure for writing instruments, which is formed at a position lower than the top surface height.   The clip structure for a writing instrument according to claim 1, wherein the notch is a stepped portion or an inclined portion.   3. The clip structure for a writing instrument according to claim 1, wherein the notch is provided on one end side in the longitudinal direction of the clip among edges of an inner surface of the opening.   The said notch is a clip structure for writing instruments as described in any one of Claims 1-3 provided in the both ends in the longitudinal direction of the said clip among the edges of the inner surface of the said opening.   The clip structure for a writing instrument according to any one of claims 1 to 4, wherein a depth of the notch from the top surface of the protrusion is 10% or more with respect to a height of the protrusion. The projecting portion has a restricting portion provided on the top surface side of the projecting portion with respect to the pivot point,
The clip structure for a writing instrument according to any one of claims 1 to 5, wherein the restricting part restricts relative movement of the clip with respect to the protruding part in a direction away from the writing instrument main body.   The clip structure for a writing instrument according to claim 6, wherein the restricting portion is a protruding portion that protrudes from an outer surface of the protruding portion toward the notch.   Writing instrument provided with the clip structure for writing instruments as described in any one of Claims 1-7.

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