JP2008230085A - Clip installation structure for writing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clip installation structure for a writing implement which keeps the structure simple and easy to assemble and enables a clip to be securely attached to a shaft tube in a rotatable manner. <P>SOLUTION: Latching holes 14 are formed on the rear end sides of bent parts 12 on both sides of a clip body 11, and first inward latching shoulders 15 are formed on the rear end of the clip body. Turnable spindles 23 are provided in an projecting manner on installation walls 22 on the rear end side of the shaft tube, and second latching shoulders 24 are formed on the rear ends of the installation walls. The turnable spindles are engaged with the latching holes of the clip, and an approximately U-shaped spring member 3 is pressed into a gap between the installation walls 22 so that either end of the spring member 3 is engaged into the first latching shoulders or the second latching shoulders, thereby the rear end of the clip snaps to open. Inward spring member non slip fall prevention walls 16 are formed closer to the leading edge than the latching holes of the clip. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a clip attachment structure for a writing instrument, and further relates to a clip attachment structure for a writing instrument that expands greatly when a tail end portion of the clip is pushed.

Conventionally, as a clip mounting structure of a writing instrument in which the tip end of the clip is separated from the shaft tube and expands when the tail end of the clip is pushed, for example, a pair of grooves are formed on the surface of the raised portion of the shaft tube and the clip, A tip arc-shaped protrusion formed on the clip is placed on an arc-shaped recess formed on the raised portion of the shaft tube, and this is used as a rotation fulcrum, and a spring made of a U-shaped wire is fitted into these grooves. A clip is known which is attached to a shaft cylinder so as to be rotatable about a fulcrum. (See Patent Document 1)
JP 2006-192724 A

  In the above clip mounting structure, since the clip is not pivotally supported by the shaft cylinder, the structure is simple, but rattling tends to occur, and the holding of the clip is unstable. In addition, it takes time to form grooves in the clip and the shaft cylinder, and there is also a problem that it takes time to assemble the spring made of a wire rod into these grooves.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a clip mounting structure for a writing instrument that has a simple structure and is easy to assemble and that can securely mount the clip to a shaft tube so as to be pivotable.

  In order to achieve such an object, the clip mounting structure of the writing instrument of the present invention is formed with a locking hole on the tail end side of a pair of bent pieces obtained by bending both side edges in the axial direction of the clip body inward, The clip body is formed with an inward first locking step at the tail end of the clip body, and a pair of mounting walls standing in the axial direction on the tail end side are provided with projecting pivot shafts outward. The shaft tube is formed with a second locking step portion facing outward at the tail end of the mounting wall, and a substantially U-shaped spring member, and the rotation support shaft of the shaft tube is engaged with the locking hole of the clip. Then, a substantially U-shaped spring member is pushed into the space between the mounting walls with the top portion at the tip side, and at least one end portion of the spring member is pushed into the first locking step portion or the second locking portion. Bounced so that the tail end of the clip expands by locking to the step, and the ball at the tip of the clip is the barrel So as to pressure contact with the surface. Further, it is preferable to form an inward spring material fall-off preventing wall on the tip side from the clip locking hole.

  In this way, since the pivot support shaft of the shaft cylinder is engaged with the locking hole of the clip, the clip can be firmly attached to the shaft cylinder without being rattled, and the spring member can be attached to the mounting wall. Since it can be assembled by pushing into the space between them and locking one end of the spring member to the first locking step or the second locking step, the assembling work is easy. If an inward spring material fall-off prevention wall is formed on the tip side from the clip's locking hole, the spring member can be prevented from falling off even if an inadvertent force is applied to the spring member and the tip is shifted to the tip side.

  The best mode for carrying out the invention will be described below with reference to the drawings. In FIG. 1, a clip 1 molded with a synthetic resin has a pair of bent pieces 12 formed by bending both ends of the clip body 11 in the axial direction inward. The tip of the bent piece 12 is formed in an arc shape to form a ball portion 13, and a locking hole 14 is formed in the tail end portion of the bent piece 12. Further, the tail end of the clip body 11 is bent slightly inward to form a first locking step portion 15, and an inward spring member falling prevention wall 16 is formed slightly toward the tip side from the locking hole 14. Yes.

  A pair of mounting walls 22 in the axial direction is formed in the large diameter portion 21 at the tail end of the shaft cylinder 2. A rotation support shaft 23 projects from the mounting wall 22, and a small second locking step 24 is formed outwardly from the large-diameter portion 21 at the tail end of the mounting wall 22. Here, the dimension between the outer surfaces of the pair of mounting walls 22 is approximately equal to the dimension between the inner surfaces of the pair of bent pieces 12 of the clip 1, and the inner diameter of the locking hole 14 is approximately equal to the outer diameter of the rotation support shaft 23. ing. In addition, the axial cylinder 2 may be a cap of a writing instrument, and the axial cylinder in this application is a broad meaning including a cap.

  As shown in FIG. 2, the spring member 3 of the torsion coil spring has action parts 32 and 33 extending from both ends of the coil part 31 in a V shape. Power is generated. The tips 32 a and 33 a of the action portions 32 and 33 are bent in parallel with the coil portion 31. The spring member 3 is not limited to a torsion coil spring, and the action portion extends in a V shape like a substantially U-shaped leaf spring, and the elastic force is reduced by reducing the angle between the pair of action portions. It only has to occur.

  Then, the bent portion 12 at the tail end of the clip 1 is pushed in alignment with the mounting wall 22 of the shaft cylinder 2, and the rotation support shaft 23 is fitted into the engaging hole 14 as shown in FIG. The cylinder 2 can be rotated. Therefore, the clip 1 can be firmly attached to the shaft cylinder 2 without rattling. Here, an inclined portion 23 a is formed on the upper side of the rotating support shaft 23, and an inclined portion 12 a is also formed on the inner side of the distal end of the bent portion 12, so that the rotating support shaft 23 can be easily inserted into the engagement hole 14. It can be inserted. Next, the spring member 3 is pushed into the space 25 between the mounting walls 22. That is, the coil portion 31 is set at the head, and the action portions 32 and 33 are pushed slightly smaller with a fingertip or the like. And if the front-end | tips 32a and 33a pass the 1st latching step part 15 and the 2nd latching step part 24, a finger | toe will be released. As a result, the angles of the action portions 32 and 33 are enlarged, the tail end portion of the clip 1 is ejected and expanded, and the ball portion 13 at the tip is pressed against the surface of the shaft tube 2.

  When the spring member 3 is fitted into the space 25, the clip 1 rotates and the tail end side expands, and the clip 1 is inclined with respect to the shaft tube 2 with the tail end side widened. For this reason, the force acts so that the spring member 3 is shifted to the tail end side, but the first locking step portion 15 and the second locking step portion 24 are formed, so that the tips 32a and 33a of the spring member 3 are formed. Any one of them is locked to the first locking step 15 or the second locking step 24 and does not fall off to the tail end side. But you may make it the front-end | tip 32a, 33a of the spring member 3 latch to the 1st latching step part 15 and the 2nd latching step part 24 simultaneously. Further, since the left and right sides of the spring member 3 are surrounded by the mounting wall 22, they do not fall off in the left-right direction. Further, there is a possibility that the spring member 3 is displaced to the tip side due to an impact at the time of dropping, but if the spring member drop prevention wall 16 is provided, the spring member 3 will not fall to the tip side. And if the tail end part of the clip 1 is pushed, as shown in FIG. 5, it can also insert in thick paper, such as a panel in which the front end side of the clip 1 expands greatly.

(A) is a cross-sectional view of the clip, (B) is a vertical cross-sectional view of the clip, (C) is a cross-sectional view of the shaft tube, and (D) is a front view of the shaft tube. (A) is a front view of a torsion coil spring, (B) is a plan view. It is sectional drawing of the state which assembled | attached the clip to the axial cylinder. It is the front view which notched a part of example of the present invention. It is explanatory drawing of the state which expanded the clip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Clip 11 Clip main body 12 Bending piece 13 Ball | bowl part 14 Locking hole 15 1st locking step part 16 Spring member drop prevention wall 2 Shaft cylinder 21 Large diameter part 22 Mounting wall 23 Turning support shaft 24 2nd locking step Part 3 Spring member 31 Coil part 32 Action part 33 Action part

Claims (2)

A locking hole is formed on each of the tail ends of a pair of bent pieces that are bent inward on both side edges in the axial direction of the clip body, and an inward first locking step is formed on the tail end of the clip body. And a pair of mounting walls erected in the axial direction on the tail end side, respectively, and a rotation support shaft projecting outward from each other, and a second locking outward toward the tail end of the mounting wall Consists of a shaft tube formed with a stepped portion and a substantially U-shaped spring member,
The pivot support shaft of the shaft cylinder is engaged with the locking hole of the clip, and a substantially U-shaped spring member is pushed into the space between the mounting walls with the top portion at the tip side, and at least substantially U-shaped. The end portion of the clip-shaped spring member is engaged with the first locking step portion or the second locking step portion so that the tail end portion of the clip expands, and the ball portion at the tip end portion of the clip A clip mounting structure for a writing instrument, characterized in that is in pressure contact with the surface of the barrel.   2. The clip mounting structure for a writing instrument according to claim 1, wherein an inward spring material falling prevention wall is formed on the tip side of the clip locking hole.

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