JP4396967B2 - Attachment structure for writing instrument cap and clip - Google Patents

Description

  The present invention relates to an attachment structure of a cap used for a writing instrument such as a ballpoint pen or a mechanical pencil and a clip attached to the cap.

Many fixing structures in which a clip is fixed to a cap are known. If the clip is molded integrally with the cap, this is not a problem, but if the clip and cap are formed of separate parts and combined, the clip and cap will come off due to excessive load. There is a problem of end. In addition, there is no problem if the object to be held such as the pocket edge of the clothes is thin. is there.

As a fixing structure in which a clip and a cap are formed as separate parts, for example, Patent Document 1 exists.
The conventional problems will be described in detail with reference to FIGS. 10 and 11 schematically showing FIG. 2 of Japanese Patent Application Laid-Open No. 51-63425. FIG. 10 shows the clip 3 fixed to the protrusion 2 formed on the side surface of the case body 1. A part of the clip 3 is bent inward, and the bent portions (not shown) are inserted and fixed in grooves 4 a and 4 b formed on both side surfaces of the protruding portion 2. If an excessive load is applied upward (in the direction away from the case body 1) with respect to the clip 3, the bent portion is detached from the grooves 4a and 4b due to breakage or deformation of the protrusion 2, and as a result, the clip 3 is detached. There is a risk that. One means for solving this problem is to increase the distance A between the groove upper surface 5 and the protruding portion upper surface 2a. FIG. 11 shows an enlarged part A. Increasing the size of the A portion results in an increase in the protruding amount B of the protruding portion 2 and the protruding amount C of the clip top portion 3a. Note that the protrusion amounts B and C indicate distances from the central axis of the case body 1.

As described above, by increasing the size of the portion A, the clip 3 can be removed easily. On the other hand, the size C of the top portion 3a of the clip 3 is increased, or the protruding amount of the protruding portion 2 is increased. Since B will become large, there exists a possibility of impairing an external appearance. Moreover, if the protrusion 2 must be enlarged in order to prevent the clip 3 from coming off, design constraints will increase.
Then, this invention makes it a subject to provide the fixing structure of the cap for writing implements and a clip which does not impair an external appearance, preventing the detachment | leave of the clip from a cap.

A first means for solving the problem is an attachment structure of a writing instrument cap having an open portion on one side and a closing portion on the other, and a clip, and the clip attaching portion to which the clip is attached to the cap The clip mounting portion includes a base portion and a protruding portion protruding outward from the base portion, and protrudes in the circumferential direction on both sides of the protruding portion and along the longitudinal direction of the cap. A jaw groove is formed, and an insertion groove into which the bent portion of the clip is inserted is formed between the base portion and the jaw portion, and an engagement portion of the clip is engaged with the bottom of the insertion groove. The clip is formed at one end of the clip, the inner bent portion having both side surfaces bent inward, and the jaw portion is accommodated in the inner bent portion. The housing and an opening formed at least at one end of the housing. And an engaging portion that is formed at the tip of the inwardly bent portion and engages with the engaged portion provided in the clip mounting portion, and the insertion groove advances toward the closing portion of the cap. Accordingly, it is characterized in that it is formed to be inclined in the cap axis direction.
The attachment of the cap and the clip is not limited to the method of inserting the clip from the opening portion side toward the closing portion side as in the embodiment described later, but is the method of inserting from the closing portion side toward the opening portion side. May be. Moreover, the side wall part which connects an inward bending part and a clip upper surface may be expanded using elastic deformation, and the method of inserting an inward bending part in an insertion groove from the upper part of an attachment part may be sufficient.
As in the first means, the insertion groove is formed so as to be inclined toward the cap axial direction as it proceeds in the direction of the cap closing portion, thereby sufficiently securing the thickness of the jaw portion on the closing portion side. And the height of the protrusion part from a cap outer peripheral surface can be suppressed. As a result, it is possible to provide an attachment structure for the writing instrument cap and the clip that can prevent the clip from coming off without impairing the appearance.

In the first means, the second means is configured such that a distance from the cap central axis of the upper surface of the protruding portion on the cap opening portion side is larger than a distance from the cap central axis of the upper surface of the protruding portion on the cap closing portion side. It is characterized by that.
It is possible to secure the thickness of the jaw part on the open part side, and it is possible to further prevent the clip from coming off due to breakage or deformation of the jaw part.

A third means relates to the first or second means, wherein the engaging portion and the engaged portion are engaged when the clip is inserted into the clip mounting portion from the opening portion side of the cap toward the closing portion side. The distance between the upper surface of the insertion groove and the upper surface of the protrusion is smaller on the cap opening portion side than on the cap closing portion side.
To reduce the gap formed between the upper surface of the clip and the upper surface of the protruding portion at the end of the upper surface of the clip on the closing portion side, and to reduce the distance from the center of the cap axis to the upper surface of the clip at the front opening of the clip. And can be a cap that does not impair the appearance.

The fourth means is characterized in that, in the first, second or third means, the thickness of the cap at the location where the base portion is provided is larger on the closing portion side than on the opening portion side. It is.
Since the insertion groove is inclined in the cap axial direction as it proceeds in the direction of the closed portion of the cap, the thickness of the base portion tends to decrease as it advances in the direction of the closed portion. If the thickness of the base portion is small, the closed portion side of the base portion may be deformed or damaged. By increasing the thickness of the cap on the closed portion side, deformation around the base portion is prevented, and clip disengagement is prevented.

ADVANTAGE OF THE INVENTION By this invention, the fixing structure of the cap for writing instruments and a clip which does not impair an external appearance can be provided, preventing removal of the clip from a cap.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

FIG. 1 is a top view showing a state in which the clip 40 is attached to the cap 10. The cap 10 is composed of a cap body 11 and a crown 12. A clip mounting portion 13 is formed on the top crown side of the side surface of the cap body 11, and the clip 40 is locked to the mounting portion 13. In the present embodiment, the cap 10 includes the cap body 11 and the crown 12, but the cap body 11 may be simply closed without using the crown 12.
Hereinafter, in the present specification, the direction of the cap 10 that is closed by the provision of the crown 12 or the like is referred to as the closed portion side, and is the side opposite to the closed portion side, where the writing instrument is inserted and removed. Is called the open side. It is possible to form a ventilation portion that allows ventilation to be performed when the cap 10 is accidentally swallowed by the top crown 12, but in this case, the top crown 12 side is also referred to as a closed portion side.

  FIG. 2 is a top view showing a state in which the crown 12 is removed from FIG. 1 except that the crown 12 is removed. Hereinafter, in order to make the drawing easy to see, description will be made with reference to the state in which the crown 12 is removed as described above.

FIG. 3 is a top view showing attachment of the clip 40 to the cap body 11. In the present embodiment, the clip 40 is inserted and fixed from the open side of the cap body 11. As will be described in detail later, an inner bent portion 41 is formed by bending both side surfaces of the clip 40 inward at one end of the clip 40 on the closing portion side. A serrated engagement portion 42 is formed at the tip of the inwardly bent portion 41.
On the other hand, a clip attachment portion 13 is also formed on the closing portion side of the cap body 11, and a saw blade-like engaged portion 14 is formed on the attachment portion 13, and the engaged portion 14 and the above-described engagement portion 14 are formed. The clip 40 is fixed to the cap body 11 by the engagement portion 42 engaging.
The engaging portion 42 and the engaged portion 14 reduce resistance when the clip 40 is inserted into the cap body 11 from the opening portion side toward the closing portion side, and when a load is applied in a direction opposite to the insertion direction. The shape is such that the resistance increases. More specifically, the peak of the saw blade is gradually increased toward the cap closing portion side, and when it reaches a certain height, it is divided into one paragraph, and further, the peak of the saw blade is increased again from the point where this one step is dropped. Is. The engaging portion 42 and the engaged portion 14 are continuously formed with this shape.

FIG. 4 is a bottom view (B) and a side view (A) showing the details of the clip 40. At one end (left end in the figure) of the clip 40, an inwardly bent portion 41 is formed by bending both side surfaces of the clip 40 inward. A side wall 46 is formed between the inwardly bent portion 41 and the clip upper surface 45. A storage portion 43 that stores the jaw portion 17 of the clip attachment portion 13 is formed inside the inwardly bent portion 41. Moreover, the opening part 44 is formed in the both ends of the accommodating part 43, and the jaw part 17 is inserted from the opening part 44 by the side of a closure part. As described above, the engaging portion 42 that engages with the engaged portion 14 provided in the clip mounting portion 13 is formed at the tip of the inward bent portion 41.

FIG. 5 is a side view (A) showing details of the clip mounting portion 13, a cross-sectional view (B) along the line BB, and a cross-sectional view (C) along the line CC. The clip attachment portion 13 includes a base portion 15 and a protruding portion 16 that protrudes outward from the base portion 15. On both sides of the projecting portion 16, a jaw portion 17 is formed so as to project in the circumferential direction and along the longitudinal direction of the cap body 11. Between the base portion 15 and the jaw portion 17, an insertion groove 18 into which the inward bent portion 41 of the clip 40 described above is inserted is formed. At the bottom of the insertion groove 18, an engaged portion 14 to which the engaging portion 42 of the clip 40 is engaged is formed. And as shown to (A), the insertion groove | channel 18 descend | falls (it inclines in the axial center direction of the cap 10) as it goes to the obstruction | occlusion part direction of the cap 10, and is formed.
As shown in FIG. 3, the clip 40 has a structure that is engaged when inserted into the clip attachment portion 13 from the open portion side of the cap 10 toward the closing portion side.

Further, the distance between the insertion groove upper surface 18a and the upper surface 16a of the protruding portion 16 is characterized. The distance Y between the insertion groove upper surface 18a and the protrusion upper surface 16a on the cap opening portion side is smaller than the distance X between the insertion groove upper surface 18a and the protrusion upper surface 16a on the cap closing portion side. The reason why the distance between the insertion groove upper surface 18a and the protrusion upper surface 16a is thus different will be described later with reference to FIG.
The clip mounting portion 13 has a protruding portion 16 formed outward from the base portion 15. On both side surfaces of the projecting portion 16, jaw portions 17 projecting on both sides in the circumferential direction are formed. Further, a tapered surface 19 is formed from the upper surface toward each jaw portion 17. An insertion groove 18 is formed between each jaw portion 17 and the base portion 15, and an engaged portion 14 is formed at the bottom of the insertion groove 18.

  Next, FIG. 6 will be described. FIG. 6 is a supplementary diagram for explaining FIG. In FIG. 5, as described above, the distance Y between the insertion groove upper surface 18a and the protrusion upper surface 16a on the cap opening side is larger than the distance X between the insertion groove upper surface 18a and the protrusion upper surface 16a on the cap closing part side. It is getting smaller. If the distance Y is greater than the distance X, the following problem occurs. When the clip 40 is inserted into the clip attachment portion 13 from the opening portion side of the cap 10, the dimension S of the opening portion 44 on the closing portion side of the clip 40 (the clip upper surface 45 and the inward bent portion 41 in the opening portion 44). If the distance S) is not larger than the distance T between the insertion groove upper surface 18a and the upper surface 16a of the projecting portion 16 on the open portion side end surface 21 of the projecting portion 16, the clip 40 can be inserted into the clip mounting portion 13. Can not. For this reason, the dimension of S must be larger than T.

FIG. 7 is a side view showing a state in which the cap body 11 and the clip 40 are fixed from the state shown in FIG. FIG. 7 shows a state in which the clip 40 is attached to the clip attachment portion 13 in a dimensional relationship (S> T) as shown in FIG. As a result, a gap 50 is formed between the upper surface 45 of the clip 40 and the protruding portion upper surface 16a at the end portion 45a of the clip upper surface 45 on the closing portion side. The distance G from the center of the cap axis to the clip upper surface 45 at the front opening 44 of the clip increases by the gap 50.
Therefore, when the clip 40 is configured to be engaged when the clip 40 is inserted into the clip mounting portion 13 from the open portion side of the cap 10 toward the closing portion side, the insertion groove upper surface 18a and the protruding portion upper surface 16a It is desirable that the distance be smaller on the cap opening portion side than on the cap closing portion side.

  FIG. 8 shows a side view after the clip 40 is attached to the cap body 11 from the state of FIG. In this figure, the distance between the upper surface 18a of the insertion groove and the upper surface 16a of the protrusion 16 is set so that the cap opening portion side is smaller than the cap closing portion side, and the insertion groove 18 is inclined. Therefore, the thickness of the jaw 17 in the opening 44 on the closing part side can be sufficiently secured, and the distance G between the clip upper surface 45 and the cap central axis in the opening 44 on the closing part side can be reduced. Can do. Further, the distance E from the cap central axis to the protruding portion upper surface 16a at the closing portion side end 45a of the clip upper surface 45, and the distance F from the cap central axis to the protruding portion upper surface 16a at the open portion side end surface 21 of the protruding portion 16 Is formed so that F is larger than E. With such a relationship, the thickness of the jaw portion 17 can be secured even on the open portion side, and the clip 40 can be prevented from coming off due to breakage or deformation of the jaw portion 17.

FIG. 9 is a longitudinal sectional view of the cap body 11 with the clip 40 attached. A step portion 20 is formed on the inner peripheral surface of the cap body, and the wall thickness on the closing portion side is larger than the step portion 20. As a result, the distance (thickness) between the insertion groove 18 and the inner peripheral surface of the cap is larger (thicker) on the closed portion side than on the open portion side.
Since the insertion groove 18 is inclined in the cap axial direction as it advances in the closing portion direction of the cap 10, the thickness of the base portion 15 tends to decrease as it advances in the closing portion direction. If the thickness of the base portion 15 is small, the closed portion side of the base portion 15 may be deformed or damaged. By increasing the thickness of the cap 10 on the closed portion side, deformation around the base portion 15 is prevented, and the clip 40 is prevented from coming off. In order to increase the thickness of the cap body 11, the cap inner peripheral surface may be gradually reduced in diameter toward the cap closing portion.

It is a top view which shows the state in which the clip was attached to the cap. It is a top view which shows the state which removed the crown from FIG. It is a top view which shows attachment of the clip to a cap main body. It is the bottom view (B) and side view (A) which show the detail of a clip. It is the side view (A) which shows the detail of a clip attaching part, and sectional drawing (B), (C). FIG. 6 is a supplementary diagram for explaining FIG. 5. It is a side view which shows the state which fixed the cap main body and the clip from the state shown in FIG. The side view after attaching a clip to a cap main body from the state of Drawing 3 is shown. It is a longitudinal cross-sectional view in the state where the clip was attached to the cap body. It is the longitudinal cross-sectional view which showed the prior art typically. It is the longitudinal cross-sectional view which showed the prior art typically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case body 2 Protrusion part 2a Projection part upper surface 3 Clip 3a Clip top part 4a Groove 4b Groove 5 Groove upper surface 10 Cap 11 Cap main body 12 Cap crown 13 Clip attachment part 14 Engagement part 15 Base 16 Projection part 16a Projection part upper surface 17 Jaw Part 18 Insertion groove 18a Insertion groove upper surface 19 Tapered surface 20 Step part 21 Opening part side end face 40 Clip 41 Inwardly bent part 42 Engaging part 43 Storage part 44 Opening part 45 Clip upper surface 45a Clip upper surface closing part side end part 46 Side wall Part 50 Clearance A Distance between groove upper surface and protrusion upper surface B Projection amount of protrusion C Projection amount of clip top X Distance between upper surface of insertion groove and upper surface of protrusion on cap closing side Y Upper surface of insertion groove on cap opening part side The distance between the upper surface of the protrusion and the upper surface of the protrusion S The dimension T of the opening on the closing portion side of the clip The distance between the upper surface of the insertion groove and the upper surface of the protrusion E Distance from the cap central axis to the upper surface of the protruding portion at the end of the upper surface of the clip on the closing portion side F Distance from the cap central axis to the upper surface of the protruding portion at the end surface of the opening on the protruding portion G Front opening of the clip from the cap central axis Distance to the top surface of the clip

Claims (4)

It is an attachment structure of a writing instrument cap formed with an open part on one side and a closed part on the other side, and a clip, and the cap is provided with a clip attachment part to which the clip is attached,
The clip mounting part is
The base,
It consists of a protruding part protruding outward from the base,
Insertion in which both sides of the protruding portion protrude in the circumferential direction and a jaw portion is formed along the longitudinal direction of the cap, and a bent portion of a clip is inserted between the base portion and the jaw portion A groove is formed,
An engaged portion to be engaged with an engaging portion of the clip is formed at the bottom of the insertion groove,
At one end of the clip,
Inwardly bent portions with both side surfaces bent inward,
An accommodating portion that is formed inside the inwardly bent portion and accommodates the jaw portion therein;
An opening formed in at least one end of the accommodating portion;
An engagement portion that is formed at the tip of the inward bending portion and that engages with the engaged portion provided in the clip mounting portion is provided,
The attachment structure for a writing instrument cap and a clip, wherein the insertion groove is formed so as to be inclined toward the cap axial direction as it advances in the direction of the closing portion of the cap.   2. The writing instrument according to claim 1, wherein a distance from the cap central axis of the upper surface of the protruding portion on the cap opening portion side is larger than a distance from the cap central axis of the upper surface of the protruding portion on the cap closing portion side. Cap and clip mounting structure. The engaging portion and the engaged portion are structured to be engaged when the clip is inserted into the clip mounting portion from the opening portion side of the cap toward the closing portion side,
The attachment structure of a cap for a writing instrument and a clip according to claim 1 or 2, wherein a distance between the upper surface of the insertion groove and the upper surface of the protruding portion is smaller on the cap opening portion side than on the cap closing portion side. . 4. The writing instrument cap and clip according to claim 1, wherein the thickness of the cap at the location where the base is provided is greater on the closed portion side than on the open portion side. Mounting structure.

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