JP3138306U - Clip attachment structure for writing instruments - Google Patents

Abstract

A clip mounting structure capable of mounting a clip member and a coil spring therefor without occupying the space inside the writing instrument.
A coil spring 24 is interposed between a clip member 22 and a tail crown 20 which is a clip attached member. The coil spring 24 biases the two in a direction away from each other. A projection 20j provided on the outer surface of the coil member 20 is inserted, and the other end of the coil spring 24 is inserted into a recess 22d provided on the surface of the clip member 22 facing the tail crown 20 side.
[Selection] Figure 2

Description

  The present invention relates to a clip mounting structure for a writing instrument that includes a clip mounted member and a clip member, and the clip member is swingably connected at a connecting portion of the clip mounted member.

  Conventionally, many types of clip mounting structures of this type are known, and a coil spring is interposed between the clip member and the clip mounting member to urge both of them in the direction away from each other. Many are also known. For example, in the device described in Patent Document 1, the rear end portion of the outer cylinder is a certain thickness portion, and the leg portion of the rear end portion of the clip member is not detached from the vertical hole provided in the thick portion. The coil spring is interposed between the leg portion and the bottom of the vertical hole.

Japanese Utility Model Publication No. 5-45517

  However, in the configuration of Patent Document 1, there is a problem that a thick portion for the clip member must be provided at the rear end portion of the writing instrument, and the use of the internal space of the writing instrument is restricted.

  This invention is made | formed in view of this subject, The objective is to provide the clip attachment structure which can attach a clip member and its coil spring, without occupying the space inside a writing instrument.

In order to achieve the above-mentioned object, the device according to claim 1 is provided with a clip attached member and a clip member, and the clip member is swingably connected at a connecting portion of the clip attached member. In clip mounting structure,
A coil spring that urges the clip member and the clip attached member in a direction away from each other is inserted, and a projection provided on the outer surface of the clip attached member is provided at one end of the coil spring. The other end of the coil spring is inserted into a recess provided on the surface of the clip member facing the clip attached member side.

  The invention described in claim 2 is characterized in that the protrusion provided on the outer surface of the clip attached member according to claim 1 is formed in a recess provided on the outer surface of the clip attached member. And

  The invention described in claim 3 is characterized in that the protruding end surface of the protrusion of the clip attached member according to claim 2 and the outer surface around the recess of the clip attached member are substantially flush.

  The invention described in claim 4 is the one described in any one of claims 1 to 3, characterized in that the clip attached member is a tail crown provided at the rear end of the writing instrument.

  According to the first aspect of the present invention, the protrusion provided on the outer surface of the clip attached member is inserted into one end of the coil spring, and the other end of the coil spring is on the surface of the clip member facing the clip attached member side. In order to be inserted into the provided recess, the coil spring can be arranged on the outer surface side of the clip attached member and between the clip attached member and the clip member without being provided inside the writing instrument. This space can be effectively used for the cursive body, for example. Even in such a case, both ends of the coil spring are restrained by the protrusion provided on the outer surface of the clip attached member and the recess provided in the clip member, so that the coil spring can be prevented from falling off. By providing a recess instead of a protrusion on the clip member side, the coil spring can be easily assembled.

  According to the invention of claim 2, by forming the protrusion in the recess, it is possible to reduce the protrusion height of the protrusion from the outer surface of the clip attached member while preventing the coil spring from falling off, The clip member can have a large swing stroke, and the material cost can be reduced.

  According to the third aspect of the present invention, by making the protruding end surface of the protrusion and the outer surface of the clip mounting member around the recess substantially flush, the protrusion height of the protrusion from the outer surface of the clip mounting member is substantially the same. It can be set to zero, the swinging stroke of the clip member can be increased, and the material cost can be reduced.

  According to the invention described in claim 4, when the clip attached member is a tail crown, even when the clip attached member is damaged or defective, it is only necessary to replace the tail crown, and the clip attached member can be manufactured at low cost. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiment.

  FIG. 1 is a longitudinal sectional view showing the entire writing instrument in which the clip mounting structure of the writing instrument of the present invention is realized. Although the writing instrument 10 of this example is a mechanical pencil, it is not restricted to this, It can apply to arbitrary writing instruments, such as a ball-point pen. The writing instrument 10 is arranged in the outer cylinder 12, a tip 14 screwed to the tip of the outer cylinder 12, a cylindrical elastic grip 16 provided around the front portion of the front cylinder 12, and the outer cylinder 12. A core feeding mechanism 18 which is a cursive body provided is provided. Any known configuration can be applied to the core feeding mechanism 18, and the description thereof is omitted.

  At the rear end of the outer cylinder 12, a tail crown 20 as a clip attached member constituting the rear end portion of the writing instrument 10 is attached. The outer cylinder 12 and the tail cap 20 are attached as shown in FIG. A mounting hole 12a is formed in the outer cylinder 12, and a guide groove 12b is formed inside the outer cylinder 12 so as to align with the mounting hole 12a, and a notch is formed at the rear end of the outer cylinder 12. 12c is formed. On the other hand, the tail cap 20 roughly includes a main body 20a and a small-diameter portion 20b that extends forward from the main body 20a and is inserted into the outer cylinder 12. In the small diameter portion 20b, an elastically deformable elastic piece 20d surrounded by a U-shaped slit 20c is formed, and an attachment projection 20e is formed on the outer surface of the elastic piece 20d. Further, a protruding portion 20f protruding in the axial direction is formed at a boundary portion between the main body 20a and the small diameter portion 20b.

  When the small-diameter portion 20b of the tail cap 20 is inserted into the outer cylinder 12, the elastic piece 20d slides in the guide groove 12b while bending inward, and when it reaches the mounting hole 12a, the restoring force of the elastic piece 20d. As a result, the attachment protrusion 20e engages with the attachment hole 12a, and the tail cap 20 and the outer cylinder 12 are coupled. At the same time, the protruding portion 20f of the tail cap 20 is fitted into the notch 12c of the outer cylinder 12. In this way, the tail cap 20 can be easily attached to the outer cylinder 12. Further, the tail crown 20 can be easily detached from the outer cylinder 12 by pulling out the tail crown 20 while pushing the mounting protrusion 20e and the elastic piece 20d inward. In a state in which the tail cap 20 is attached to the outer cylinder 12, the lead tank 19 that is a part of the cursive body passes almost through the tail cap 20, and the eraser 21 is attached to the rear end of the lead tank 19. Protrudes from the rear end of the tail crown 20.

  A connecting portion 20g for connecting the clip member 22 is formed on the main body 20a of the tail crown 20, and the connecting portion 20g includes a pair of cylindrical shaft portions 20h and 20h. Further, a recessed portion 20i that is recessed from the outer surface of the tail crown 20 is formed at a portion rearward of the connecting portion 20g, and a projection 20j is formed at the central portion of the recessed portion 20i. Preferably, the protrusion height of the protrusion 20j is substantially the same as the height of the outer surface around the recess 20i of the tail crown 20, that is, the protrusion end surface of the protrusion 20j and the outer surface of the tail crown around the recess 20i are It should be substantially flush (see FIG. 2).

  The clip member 22 roughly includes a clip plate portion 22a and clip side plate portions 22b extending from both side edges of the clip plate portion 22a toward the outer cylinder 12, respectively. A receiving portion 22c that receives each cylindrical shaft portion 20h is formed inside each clip side plate portion 22b. Further, a concave portion 22d is formed on the inner surface of the clip plate portion 22a at a position behind the receiving portion 22c.

  When the cylindrical shaft portion 20 h of the corresponding tail crown 20 is fitted to the receiving portion 22 c of the clip member 22, the clip member 22 is swingably connected to the tail crown 20, and the axial direction of the outer cylinder 12 Along the outside of the outer cylinder 12. The clip plate portion 22a of the clip member 22 hides the mounting hole 12a of the outer cylinder 12 in the connected state.

  Normally, a coil spring 24 is interposed between the clip member 22 and the tail crown 20 so that the tip of the clip member 22 is pressed against the outer surface of the outer cylinder 12 so that a clamping force is generated between them. It is inserted. The coil spring 24 is disposed behind the connecting portion 20g and biases the tail crown 20 and the clip member 22 in a direction away from each other.

  As shown in FIGS. 2 and 3, the coil spring 24 is configured such that the projection 20 j of the tail crown 20 is inserted into one end of the coil spring 24 and the other end of the coil spring 24 is inserted into the recess 22 d of the clip member 22. Thus, it is disposed between the tail cap 20 and the clip member 22. Thus, the both ends of the coil spring 24 are restrained, so that the coil spring 24 can be prevented from falling off. Further, by forming the protrusion 20j in the recess 20i, the protrusion height of the protrusion 20j from the outer surface of the tail crown 20 can be lowered. Further, the protrusion 20j is provided on the tail crown 20 side, the recess 22d is provided on the clip member 22 side, and the protrusion is not provided on the clip member 22 side, so that the coil spring 24 can be easily assembled. Become. In other words, after the coil spring 24 is set on the tail cap 20, when attaching the clip member 22, the projections do not get in the way, so that the assembly is simplified.

  In the clip mounting structure configured as described above, the tip end of the clip member 22 is normally urged by the coil spring 24 in a direction in which it is pressed against the outer cylinder 12. When the object is sandwiched between the clip member 22 and the outer cylinder 12, the clip member 22 swings against the urging force of the coil spring 24 when the rear end of the clip member 22 is pushed and released. Since the gap between the front end of the clip member 22 and the outer cylinder 12 opens, an object can be inserted between them and the object can be sandwiched between them.

  When the clip member 22 swings, the height of the projection 20j is kept low, so that the swinging motion of the clip member 22 can be increased without hindering the swing. In particular, the protrusion height of the protrusion 20j from the outer surface of the clip attached member can be made substantially zero by making the protrusion end surface of the protrusion 20j substantially flush with the outer surface of the tail cap 20 around the recess 20i. Thus, the swinging stroke of the clip member can be further increased, and the material cost can be reduced.

  Thus, since the coil spring 24 is disposed outside the outer cylinder 12 and the tail crown 20, the inner space of the outer cylinder 12 and the tail crown 20 can be effectively used. In this case, Since the lead tank 19 is disposed through the tail cap 20, the length of the lead tank 19 can be secured large and the lead can be replenished to the lead tank 19 from behind the writing instrument 10. .

It is a longitudinal cross-sectional view showing the whole writing instrument with which the clip attachment structure of the writing instrument of this invention was implement | achieved. It is a principal part expanded sectional view of a clip attachment structure. It is sectional drawing seen along the 3-3 line of FIG. It is a fragmentary longitudinal cross-section when a clip member swings. FIG. 2 is a partially exploded plan view showing a coupling structure between the outer cylinder and the tail cap of FIG. 1.

Explanation of symbols

10 Writing instrument 12 Outer cylinder 20 Tail crown (Clip attachment member)
20i recess 20j protrusion 22 clip member 22d recess 24 coil spring

Claims (4)

In a clip mounting structure for a writing instrument comprising a clip mounted member and a clip member, wherein the clip member is swingably connected at a connecting portion of the clip mounted member.
A coil spring that urges the clip member and the clip attached member in a direction away from each other is inserted, and a protrusion provided on the outer surface of the clip attached member is inserted into one end of the coil spring. A clip attachment structure for a writing instrument, wherein the other end of the coil spring is inserted into a recess provided on a surface of the clip member facing the clip attachment member side.   The clip mounting structure for a writing instrument according to claim 1, wherein the protrusion provided on the outer surface of the clip attached member is formed in a recess provided on the outer surface of the clip attached member.   The clip mounting structure for a writing instrument according to claim 2, wherein the protruding end surface of the protrusion of the clip mounted member and the outer surface around the recess of the clip mounted member are substantially flush.   The clip mounting structure for a writing instrument according to any one of claims 1 to 3, wherein the clip attached member is a tail crown provided at a rear end of the writing instrument.

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