JP2014148085A - Clip fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, in order to obtain a sufficient grip force in a clip, a sufficient length is required for a second portion of an L-shaped leaf spring but in order to form a fitting hole for the sufficient length, it is difficult for a general writing instrument such as a ballpoint pen or a mechanical pencil to extend a clip base from a side surface of a barrel and the clip base may become abnormally high or a diameter of the barrel may become thick to make the appearance bad.SOLUTION: In a structure for fitting a clip to a barrel in a rotatable manner, the clip is energized to the barrel by an elastic member. A front part of the elastic member is disposed in front of rotary portions of the clip and the barrel, and a rear part of the elastic member is disposed at the back of the rotary portions of the clip and the barrel. An angle formed from the front part and the rear part of the elastic member, at a side of the barrel, is set to 90° or more.

Description

  The present invention relates to a clip mounting structure in which a clip is configured to be rotatable on a shaft cylinder.

  Up to now, various methods have been considered for a clip mounting structure for a writing instrument in which a clip is configured to be rotatable on a shaft cylinder and a front portion of the clip is urged in the axial direction of the shaft cylinder.

  According to the configuration described in claim 1 of Patent Document 1, “the first portion and the first portion provided so that the clip is pivotally supported by the clip base portion of the attached member so as to be swingable and at an angle to each other. The first part of the elastic member is provided along the clip, and the second part is fixed to the clip base part. The first part of the elastic member is provided with two parts and the angle between the first part and the second part can be changed elastically. Thus, a clamping force is generated between one end of the clip and the attached member by the elastic force of the elastic member.

JP2009-12221

  Also, the assembly method of the clip to the attached member is as follows: “Make the clip approach the attached member from the front, move the convex part of the clip along the guide groove of the attached member, and fit it into the through hole. Then, the clip is attached to the clip base portion of the member to be attached, and then the L-shaped leaf spring is inserted through the through hole from the front side of the clip, and the second portion of the L-shaped leaf spring is inserted into the attachment hole of the clip base. The mounting hole formed on the outer diameter side of the clip base into which the second portion of the L-shaped leaf spring is pushed extends in the radial direction.

  In order for the clip to obtain a sufficient gripping force, the length of the second portion of the L-shaped leaf spring needs to be sufficient. However, it is difficult to extend the clip base from the side surface of the shaft tube in order to form a sufficiently long mounting hole with a general writing instrument such as a ballpoint pen or a mechanical pencil. The height became abnormally high, and the diameter of the shaft tube became thick, which made it look bad.

The present invention relates to a clip mounting structure to a shaft cylinder in which the clip is configured to be rotatable on the shaft cylinder, and in the clip mounting structure in which the clip is biased to the shaft cylinder by an elastic member, the front portion of the elastic member is The front part of the elastic member is disposed in front of the rotating part of the clip and the shaft tube, and the rear part of the elastic member is disposed rearward of the rotating part of the clip and the shaft cylinder. The gist is that the angle on the shaft tube side is 90 degrees or more.

  According to the present invention, there is provided a clip mounting structure to a shaft cylinder configured such that the clip is rotatable on the shaft cylinder, wherein the clip is biased to the shaft cylinder by the elastic member, and the front of the elastic member is provided. And the rear part of the elastic member is arranged behind the rotating part of the clip and the shaft tube, and the front part and the rear part of the elastic member. Since the angle on the side of the shaft cylinder is 90 degrees or more, the height of the clip base can be lowered, the shaft cylinder can be made thin, and a good-looking writing instrument can be provided.

(A) Side view of the present invention (b) Longitudinal cross-sectional view of the main part of FIG. (A) Side view of shaft cylinder (b) Top view of FIG. 2 (a) (c) External perspective view of shaft cylinder (A) Side view of clip (b) Bottom view of FIG. 3 (a) (c) Cross-sectional view taken along line BB of FIG. 3 (b) (A) Side view of elastic member (b) Top view of elastic member (c) External perspective view of elastic member Assembly explanation of clip and elastic member Assembly explanatory diagram of clip fitted with shaft cylinder and elastic member (A) Side view of the second example (b) Longitudinal sectional view of FIG. 7 (a) (c) AA sectional view of FIG. 7 (a) (A) Side view of shaft cylinder of second example (b) Top view of FIG. 8 (a) (c) External perspective view of shaft cylinder of second example (A) Side view of clip of second example (b) Bottom view of FIG. 9 (a) (c) Cross-sectional view taken along line BB of FIG. 9 (b) (A) Side view of elastic member of second example (b) Top view of elastic member of second example (c) External perspective view of elastic member of second example External perspective view of other elastic members

An example of the clip mounting structure of the present invention will be described with reference to FIGS.
The shaft cylinder 1 has a cylindrical shape, and a writing body such as a ballpoint pen or a mechanical pen is disposed inside the shaft cylinder 1. Moreover, although the shaft cylinder 1 of this example is cylindrical, it may be a so-called cap with a bottom closed. In addition, since this invention does not affect the said cursive body comprised inside the axial cylinder 1 directly, the specific description of the cursive body is abbreviate | omitted.
Hereinafter, although specifically described, the front in the description refers to the direction from the rotation center axis of the clip 11 toward the ball portion 14 at the tip of the clip 11 along the central axis of the barrel 1, and the rear The upper side indicates the direction away from the center of the shaft tube 1 in the outer diameter direction, and the lower side indicates the opposite direction (the direction toward the center of the shaft tube 1).

A clip base portion 2 protruding upward is formed on the surface of the shaft tube 1. A support body 4 that supports the clip 11 and the elastic member 21 is formed at the rear of the base base 3 that is the base of the clip base portion 2, and the clip 11 when the clip 11 is assembled to the shaft tube 1 at the front. The backlash prevention convex part 5 which prevents the shake | fluctuation to a horizontal direction is formed. Further, on both side surfaces of the support 4, a rotation support shaft 6 is provided for the clip 11 to be rotatably disposed. The upper half of the head of the rotation support shaft 6 is provided with an introduction taper portion 9 having a protrusion width continuously reduced in the upward direction.
The base 3 is formed with an inclined portion 8 in contact with the second portion 23 of the elastic member 21 behind the rotation support shaft 6 formed on both side surfaces of the support 4, and on the front of the base 3. Is formed so as not to interfere when the clip 11 and the elastic member 21 are disposed on the shaft tube 1 in accordance with the outer periphery of the rotation support shaft 6, and may have any shape as long as they do not interfere.
Further, a concave hook 7 is formed at the rear end of the support body 4, and the folded portion 25 of the elastic member 21 is rotatably engaged.

Next, the clip 11 will be described. An insertion hole 18 is formed in the thick part 12 of the clip 11 toward the front, and behind the side wall 15 along the side surface of the thin part 13 so as to cover the clip base part 2 behind the insertion hole 18. Is formed. A rotation support shaft 16 is formed on both inner side surfaces of the side wall 15, and the front and upper cutouts 17 of the rotation support shaft 16 are arranged so that the clip 11 does not undercut in injection molding. It is cut out in a range that does not affect the rotation to 1.
Further, the back surface of the clip 11 is provided with a backlash preventing groove 19 extending forward from the entrance of the insertion hole 18. The width of the groove is slightly larger than the width of the rattle-preventing convex portion 5 of the shaft cylinder 1, but prevents the clip 11 attached to the shaft cylinder 1 so as to be rotatable in the lateral direction. A ball portion 14 that protrudes from the back surface of the clip 11 and abuts against the surface of the shaft tube 1 is formed further forward of the play preventing groove 19.

Next, the elastic member 21 will be described. The elastic member 21 for pressing one end of the clip 11 against the surface of the shaft cylinder 1 is composed of a single wire, and the first portion 22 and the second portion 23, and the first portion 22 and the second portion 23. It forms a pair of torsion coil springs that form a coil shape composed of the coil portions 24 to be connected, and is generally called a double torsion spring.
The first portion 22 of the elastic member 21 includes both end portions of the wire, and the second portion 23 forms an angle B with the first portion 22 through the coil portion 24. The angle B formed by the first portion 22 and the second portion 23 is set smaller than the angle A of the elastic member 21 at the time of assembly shown in FIG. 1B (B <A). That is, the angle B of the elastic member 21 before being assembled to the shaft cylinder 1 is formed smaller than the angle A after being assembled.
In this example, the angle B before assembly is set to about 160 degrees, but after assembly, the angle B is about 170 degrees. However, the present invention is not limited to this, and the angle B before assembly may be 100 degrees or 145 degrees. By reducing the angle before assembling, an urging force for a larger clip shaft is generated.
Further, a folded portion 25 is formed at the end of the second portion 23, and a torsion coil spring is connected by this folded portion 25 to form a pair, thereby constituting a double torsion spring.

The elastic member 21 is fitted into the rotation support shaft 6 formed on the support body 4 of the shaft tube 1 from the inside of the coil portion 24. By this fitting, the elastic member 21 is rotatably supported by the rotation support shaft 6, and the rotation support shaft 16 formed in the partition wall 15 of the clip 11 is also fitted from the outside of the coil portion 24. Is rotatably supported. That is, the clip 11 is rotatably supported by the shaft cylinder 1 via the coil portion 24 of the elastic member 21.
Further, the first portion 22 of the elastic member 21 is disposed in the insertion hole 18 of the clip 11, while the second portion 23 is in contact with the inclined portion 8 of the base base 3 formed in the shaft tube 1. It is arranged.

Next, the assembly method will be described with reference to FIGS.
First, the elastic member 21 is bent inward while pushing the first portion 22 of the elastic member 21 into the insertion hole 18 of the clip 11 from the rear, and the coil portion 24 is fitted into the rotation support shaft 16 (see FIG. 5).
Next, the tip of the clip 11 is tilted upward, and the folded portion 25 of the elastic member 21 fitted into the clip 11 is moved from the rear to the front, and the hook portion formed at the rear end of the support 4 7 is engaged with the folded portion 25 (see FIG. 6A).
Subsequently, the ball portion 14 formed on the back surface of the clip 11 is brought into contact with the surface of the shaft cylinder 1 while the clip 11 is tilted forward with the folded portion 25 as the rotation center (see FIG. 6B).
Further, the vicinity of the center of the clip 11 is pressed toward the shaft tube 1 from above. By pressing the clip 11 from above, the ball portion 12 of the clip 11 moves forward while being in contact with the surface of the shaft tube 1, and the side wall 13 of the clip 11 and the coil portion 24 of the elastic member 21 are moved together. It is inserted in. At this time, since the introduction taper portion 9 is formed on the rotation support shaft 6, the clip 11 and the elastic member 21 can be fitted while being gradually expanded outward along the introduction taper portion 9 (FIG. 6 ( c)).
At this time, the vicinity of the center of the clip 11 is pressed from above toward the shaft tube 1, and the ball portion 12 of the clip 11 moves forward while abutting against the side surface of the shaft tube 1, whereby the first portion of the elastic member 21. 22 and the second portion 23 are spread and the angle formed by the first portion 22 and the second portion 23 of the elastic member 21 changes from B to A. That is, the elastic member 21 is in a state of being expanded against the elastic force.

In the clip mounting structure assembled as described above, a force (restoring force) is applied to the elastic member 21 to return the angle formed by the first portion 22 and the second portion 23 from A to B. This restoring force is a force in which the first portion 22 disposed in the insertion hole 18 of the clip 11 and the second portion 23 in contact with the inclined portion 8 of the base 3 are both urged in the axial center direction. The tip of the clip 11 is an urging force that presses against the shaft tube 1.
In this configuration, the clip base 2 is formed low by providing a rearward angle with respect to the upward direction of the shaft tube 1 of the inclined portion 8 behind the base 3 contacting the second portion 23 of the elastic member 21. Can be improved and the appearance can be improved.

In the assembling method, the clip 11 and the elastic member 21 assembled earlier are fixed by arranging the first portion 22 in the insertion hole 18 and fitting the coil portion 24 into the rotation support shaft 16. A jig for holding the assembled member becomes unnecessary. Further, since the clip 11 fitted with the elastic member 21 can be fitted into the shaft cylinder around the turning portion 25 as the center of rotation, the clip 11 can be easily and reliably assembled without confirming the fitting position.
Further, the elastic member 21 is rotatably supported by fitting the elastic member 21 with the rotation support shaft 6 formed on the support body 4 of the shaft tube 1 from the inside of the coil portion 24, and further the outer side of the coil portion 24. The rotation support shaft 16 formed in the partition wall 15 of the clip 11 is fitted into the clip 11, and the clip 11 is rotatably supported. Therefore, the rotation support shaft 6 of the shaft cylinder 1 can be lowered, and bending of the clip 11 and the elastic member 21 to the outside when the clip 11 and the elastic member 21 are assembled to the shaft cylinder 1 can be reduced. It can be assembled easily.

Next, a second example of the present invention will be described with reference to FIGS.
A clip base portion 102 protruding upward is formed on the surface of the shaft tube 101. A support body 104 that supports the clip 111 and the elastic member 121 is formed behind the base base 103 that is the base of the clip base portion 102, and the clip 111 when the clip 111 is assembled to the shaft cylinder 101 is formed in the front. A backlash prevention convex portion 105 is formed to prevent the horizontal movement of the backlash. Further, on both side surfaces of the base table 103, rotation support shafts 106 for rotatably arranging the clips 111 are formed. The upper half of the head portion of the rotation support shaft 106 is provided with an introduction taper portion 109 having a protrusion width continuously reduced in the upward direction.
An inclined portion 108 with which the second portion 123 of the elastic member 121 abuts is formed behind the rotation support shaft 106 of the base pedestal 103, while the clip 111 and the elastic member 121 are shaft cylinders in front of the base pedestal 103. It is formed so as not to interfere when it is disposed on 101.
Further, a concave hook portion 107 is formed at the rear end portion of the support body 104, and the hook portion 125 of the elastic member 121 is rotatably engaged.

Next, the clip 111 will be described. An insertion hole 118 is formed in the thick portion 112 of the clip 111 toward the front, and on the rear side, the side wall 115 faces downward along the side surface of the thin portion 113 so as to cover the clip base portion 102. Is formed. A rotation support hole 116 is formed on both inner side surfaces of the side wall 115.
Further, the back surface of the clip 111 is provided with a backlash preventing groove 119 extending forward from the entrance of the insertion hole 118, and the groove width is slightly larger than the width of the backlash preventing convex portion 105 of the shaft tube 101. However, this prevents backlash in the lateral direction of the clip 111 that is rotatably attached to the shaft cylinder 101. A ball portion 114 that protrudes from the back surface of the clip 111 and contacts the surface of the shaft cylinder 101 is formed further forward of the play preventing groove 119.

Next, the elastic member 121 will be described. The elastic member 121 for pressing one end of the clip 111 against the surface of the shaft tube 1 is a rolled plate-like first portion 122 and second portion 123, and the first portion 122 and second portion 123. And a through hole 126 is formed from the first portion 122 to the second portion 123. The hook portion 125 is formed by the through hole 126.
Further, the elastic member 121 forms an angle D between the first portion 122 and the second portion 123 via the bent portion 124. The angle D formed by the first portion 122 and the second portion 123 is set smaller than the angle C of the elastic member 121 at the time of assembly shown in FIG. 7B (D <C). That is, the angle D of the elastic member 121 before being assembled to the shaft cylinder 101 is formed to be smaller than the angle C after being assembled.

The elastic member 121 is fixed to the clip 111 by press-fitting the first portion 122 into the insertion hole 118 of the clip 111, and the rotation support hole 116 of the clip 111 is fitted into the rotation support shaft 106 of the shaft cylinder 101. Thus, the clip 111 is rotatably supported.
Further, the second portion 123 of the elastic member 121 is disposed so as to abut on the inclined portion 108 of the base base 103 formed in the shaft cylinder 101.
In this embodiment, the clip 111 and the elastic member 121 can be fixed in the insertion hole 118 in addition to press-fitting the first portion 122 into the insertion hole 118. Instead of press-fitting, locking or clamping, or in addition to press-fitting, locking or clamping, it is also possible to bond with an adhesive.

In addition, the elastic member 21 mentioned in the first example of the present invention has a three-turn coil portion 24, but the number of turns can be arbitrarily set. It is also possible to use the part 324 (see FIG. 11).

DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Clip base part 3 Base stand 4 Support body 5 Backlash prevention convex part 6 Rotation support shaft 7 Hook part 8 Inclination part 9 Introduction taper part 11 Clip 12 Thick part 13 Thin part 14 Ball part 15 Side wall 16 Rotation support shaft 17 notch 18 insertion hole 19 rattle prevention groove 21 elastic member 22 first part 23 second part 24 coil part 25 folding part 101 shaft cylinder 102 clip base part 103 base base 104 support body 105 rattle prevention convex part 106 rotation support shaft 107 Hook part 108 Inclined part 109 Introduced taper part 111 Clip 112 Thick part 113 Thin part 114 Ball part 115 Side wall 116 Rotation support hole 118 Insertion hole 119 Playing prevention groove 121 Elastic member 122 First part 123 Second part 124 Bending part 125 Part 126 Through hole

Claims (4)

A clip mounting structure for a shaft cylinder configured to allow a clip to rotate on the shaft cylinder, wherein the clip is biased to the shaft cylinder by an elastic member, and the front portion of the elastic member is connected to the clip and the shaft cylinder. And the rear part of the elastic member is arranged rearward of the rotary part of the clip and the shaft tube, and the shaft cylinder side formed by the front part and the rear part of the elastic member Clip mounting structure with an angle of 90 ° or more. The clip mounting structure according to claim 1, wherein a rotating portion with the clip is configured by an elastic member. The said elastic member was made into the shape of a pair of torsion coil springs in which the intermediate part which connects a front part and a rear part, and these front parts and a rear part comprises a coil shape with a single wire. 2. The clip mounting structure according to 2. The clip attachment structure according to any one of claims 1 to 3, wherein a front portion of the elastic member is inserted into an attachment hole formed in the clip.

Images