TWI513601B - Clip mounting structure for writing implement - Google Patents

Description

Pen holder installation structure

The present invention relates to a pen holder mounting structure for a writing instrument, and more particularly to a pen holder mounting structure suitable for a ball pen, a mechanical pencil or a pen having a plurality of such pens.

In the past, the pen holder mounting structure of the pen has been attached to the rear end of the pen holder for the purpose of aesthetics as disclosed in Japanese Laid-Open Patent Publication No. 2008-194927 (hereinafter referred to as the "Patent Document"). The structure at the rear end of the pen tube, and only the pen clip is exposed to the outside of the pen tube, is known.

The structure disclosed in the above patent publication (please refer to the patent specification [0006], [0007] column and FIG. 1) is an application filed by the applicant of the present invention, and the specific configuration is that a pen holder is formed at the rear end of the pen tube. a notch portion in which the base portion is embedded, and a window-shaped opening portion (hereinafter referred to as an intermediate opening portion) is provided in the middle portion of the pen tube before the notch portion, and the pen holder to be mounted on the pen tube is formed behind the base portion of the pen holder There are a total of four hook-shaped locking pieces on both sides of the end and on both sides of the front end. When the pen holder is installed, it is necessary to first hook the hook portion of the middle portion of the pen holder, that is, the hook-shaped locking piece at the front end of the base portion of the pen holder, to the front edge portion of the middle opening portion of the pen tube. The locking piece at the rear end of the base of the pen holder is hooked on the notch edge of the notch portion of the rear end of the pen tube, and then, in this state, the insertion portion of the tail plug (tail plug) is inserted into the rear end of the pen tube, so that the The locking recess formed by the insertion portion is locked to the locking protrusion formed on the near side of the notch portion of the pen tube, and the rear end of the pen holder is clamped by the flange portion formed by the rear end portion of the tail bolt The edge portion is fixed between the notch portion of the pen tube.

According to the pen holder mounting structure of the pen of the Japanese Patent Laid-Open Publication No. 2008-194927, the base of the pen holder can be firmly fixed to the pen tube with a relatively simple operation, and only the pen holder can be exposed to the pen. The outer side of the tube combines the characteristics of the beauty of the product.

However, according to the pen clip mounting structure disclosed in the aforementioned patent document, since the rear end of the pen tube must form a notch portion and an intermediate opening portion for the rear end of the pen holder, the processing cost of the pen tube is high and the structural strength of the pen tube is affected. The problem of missing. Moreover, for the pen holder, it is also necessary to form the four hook-shaped locking pieces as described above, and the processing cost of the pen holder is also high. In addition, it is also difficult to insert the four locking pieces of the pen holder into the notch edge portion of the pen tube and the front opening edge portion of the intermediate opening portion so as to be locked, so that the pen holder is assembled. There are also problems of lack of operational imperfections. Furthermore, as described above, the structure in which the pen holder is locked to the edge portion of the notch portion and the intermediate opening portion of the pen tube by the front and rear four locking pieces will cause the pen holder to change the depth of the gripping portion of the bag, for example, the pocket. In short, there are also problems of lack of convenience and security.

The present invention is directed to solving the problems further improved as described above, and an object thereof is to provide a pen holder mounting structure for a writing instrument, which can easily and firmly mount the rear portion of the pen holder to the rear end of the pen tube, and the pen tube and The construction of the clip is also simplified to reduce the processing cost.

Further, the present invention also provides a pen holder mounting structure for a writing instrument in which the depth of the clampable portion of the pen holder is deeper than that of the pen holder of the patent document, even when a pen holder having the same length as the pen holder of the above-mentioned patent document is used.

In order to achieve the above object, the pen clip mounting structure of the present invention is composed of a pen tube, a pen holder attached to the rear portion of the pen tube, and an insert member inserted inside the rear end of the pen tube; a rear end portion of the tube is formed with a pen holder mounting portion for inserting a locking engagement at a rear portion of the pen holder; and a mounting piece bent along a direction of an inner circumferential surface of the pen tube is formed on both sides of the rear portion of the pen holder; And the outer wall of the insert member is formed with a fitting recess for accommodating and positioning the mounting piece of the pen holder; and the cap portion is fitted and fitted into the fitting recess portion of the insert member to be integrated into one body, and then Inserting the insertion member with the clip into the rear end of the pen tube, so that the rear portion of the pen holder is embedded in the pen holder mounting portion of the pen tube, so that the insertion member is locked and positioned inside the pen tube The pen tube is integrated.

Further, in the pen holder mounting structure of the writing instrument of the present invention, the pen holder mounting portion of the pen tube is constituted by a notch portion formed at the rear portion of the pen tube so as to be fitted and positioned at the rear portion of the pen holder.

Furthermore, in the pen holder mounting structure of the pen of the present invention, the pen holder mounting portion of the pen tube is respectively inserted into the neck portion of the mounting piece which is formed in the axial direction of the rear portion of the pen tube and is inserted into the rear portion of the pen holder. The slit is composed.

Further, in the pen holder mounting structure of the writing instrument of the present invention, the locking means for locking the insertion member to the inside of the rear end of the pen tube is formed on the inner wall of the pen tube and the outer wall of the insertion member One of the locking portions and the locking projection formed on the other of the two members.

Further, in the pen holder mounting structure of the pen of the present invention, the rear portion of the insertion member forms a flange portion that can abut against the rear end of the pen tube, and the locking protrusion is attached to the rear end of the pen tube at the flange portion At the position, the locking is positioned at the locking portion.

According to the above configuration of the present invention, the mounting piece formed on both sides of the rear portion of the pen holder is fitted into the fitting recess formed by the outer wall of the insertion member for inserting the rear portion of the pen tube, and the positioning piece is integrally integrated. The extremely simple assembly work of inserting the insert member into the end portion of the pen tube, that is, the rear portion of the pen holder can be easily attached to the rear portion of the pen tube, and at the same time, in the mounted state, the pen embedded in the fitting recess of the insert member The mounting piece of the clip is restrained and cannot be moved separately, so that the mounting strength of the clip can be ensured. In addition, the above-mentioned pen tube may be formed at the rear end portion of the pen tube so as to be fitted with the pen holder mounting portion integrally integrated with the rear portion of the pen holder, so that it is not necessary to provide an intermediate opening on the pen tube as shown in the aforementioned patent document. Therefore, the processing of the pen tube becomes easy, and the processing cost can be reduced. Further, in the case of the pen holder, it is only necessary to form the mounting piece at the rear portion of the pen holder, so that the processing of the pen holder becomes easy, and the processing cost can be reduced.

Moreover, according to the present invention, since the pen holder mounting portion of the pen tube can be formed only in the rear portion of the pen tube, the notch portion can be completely covered by the pen holder on the outer side of the pen tube, thereby providing a simple Convenient pen holder installation structure.

Moreover, according to the present invention, since the pen holder mounting portion of the pen tube can form parallel parallel grooves only at the rear portion of the pen tube, the fine groove can be completely covered by the pen holder on the outer side of the pen tube, It can provide a simple and convenient pen holder installation structure.

Furthermore, according to the present invention, as long as the fitting piece of the pen holder is fitted and positioned in the fitting recess of the insertion member as described above, when the insertion member is inserted into the position inside the pen tube, the locking portion of the pen tube or The locking projection is automatically engaged with the locking projection or the locking portion of the insertion member inside the pen tube, so that the pen holder can be securely attached to the pen tube.

Further, as long as the fitting piece of the pen holder is fitted and positioned in the fitting recess of the insertion member as described above, the insertion member is inserted into the inside of the pen tube, and the flange portion of the insertion member is pressed against the rear end of the pen tube. In this case, the locking portion and the locking projection can be automatically locked and positioned at a predetermined position.

Moreover, as described above, only the mounting piece of the pen holder is attached to the rear portion of the pen tube by the insertion member, and when the pen holder is inserted into the pocket or the like, only the rear end portion of the pen holder becomes a fulcrum, so the pen holder can be clipped The depth of the holding portion is lengthened in the axial direction, so that the pen holder is not easily released from the pocket, and the stability of the pen holder can be obtained.

First, an embodiment of the present invention will be described.

[Embodiment 1]

According to the pen holder mounting structure of the pen of the first embodiment of the present invention, as shown in the first figure and the second figure, the pen tube 1 is attached to the pen holder 2 at the rear end of the pen tube 1, and After the pen holder 2 is assembled, the pen holder 1 is inserted into the pen tube 1 and the inner end seal is positioned as the insertion member 3 of the tail cap. By inserting the member 3, the rear portion of the pen holder 2 is mounted and fixed to the above. The construction of the rear portion of the pen tube 1.

The end portion of the pen tube 1 is formed with a pen holder mounting portion 10 in which the rear portion of the pen holder 2 can be fitted and positioned.

In the first embodiment, the pen holder mounting portion 10 is formed by a notch portion 11 (refer to the third figure) in which the base portion of the pen holder 2 is formed at the rear end portion of the pen tube 1, and is located at the end portion of the pen tube 1 The slits 12 and 13 extending parallel to the front axial direction and the inner wall surface formed on the front portion of the notch portion 11 are convexly shaped to lock the insertion member (ie, the tail cap) 3 to be positioned at the predetermined mounting position. The locking portion 14 is formed.

The pen holder 2 has a pen clip 20 extending axially from the rear end of the pen tube 1 along the outer wall surface of the pen tube 1, and the curved base portion 21 having a curved end portion formed after the pen clip 20 is continuously formed. The pen clamping legs 22a, 23a of the two slits 12, 13 of the pen tube 1 can be embedded on both sides of the curved base 21 (refer to the sixth and eighth figures), and the two pens are clamped The sheets 22a and 23a have a structure in which the mounting pieces 22 and 23 are formed by continuously bending the front ends of the pen-pin sheets 22a and 23a as neck portions.

The pen-clip pieces (ie, the neck portions) 22a, 23a and the rear end faces of the mounting pieces 22, 23 are on the same end surface (planar surface), and the mounting pieces 22, 23 are formed to be larger than the above-mentioned pen-clip pieces (neck) Part) is a side quadrilateral piece of wide width. Further, the attachment pieces 22 and 23 are curved and formed into curved pieces each of which can follow the inner circumferential surface of the pen tube 1.

In the first embodiment, the insertion member 3 is constituted by a tail cap that can be inserted into the rear portion of the pen tube 1, and the tail cap 3 has an insertion portion 30 that can be inserted into the inside of the pen tube 1, and the insertion portion 30 A cylindrical crotch portion (cylindrical body) 31 having an outer diameter slightly the same as the inner diameter of the pen tube 1 is formed, and a pair of right and left arms extending axially forward on both sides of the cylindrical crotch portion 31 are continuously formed. The sheets 32 and 33 and the annular portion 34 formed between the pair of arm sheets 32 and 33 and having a concentric annular shape with the cylindrical portion 31 are formed. The rear end portion of the cylindrical crotch portion 31 is integrally formed with an annular flange portion 35 that can abut against the rear end of the pen tube 1, and the flange portion 35 forms an outer diameter equal to the outer diameter of the pen tube 1.

The tail cover (insertion member) 3 is formed, and the outer wall of the cylindrical portion 31 is formed with fitting recesses 36 and 37 in which the mounting pieces 22 and 23 of the pen holder 2 are fitted and positioned at the four corners of the side (see Figure 1, ninth, and tenth). The bottom surfaces of the fitting recesses 36, 37 are formed with curved surfaces having substantially the same curvature as the mounting pieces 22, 23 of the pen holder, so that the mounting pieces 22, 23 of the pen holder 2 are fitted into the fitting recesses 36, 37. In the state, the outer sides of the mounting pieces 22, 23 and the outer wall of the cylindrical portion 31 of the tail cap 3 coincide with each other on the same circumferential surface.

Further, a locking projection 38 that can be locked to the locking portion 14 of the pen tube 1 is formed between the fitting recesses 36 and 37 on the outer wall of the cylindrical jaw portion 31.

Further, a pin-holding piece (neck) for the rear end of the pen holder 2 is formed between the fitting recesses 36 and 37 on both sides of the abutting portion of the cylindrical portion 31 and the flange portion 35. The locking grooves 39a and 39b are fitted to the inner edge portions of the 22a and 23a.

Hereinafter, the method of attaching the pen holder 2 to the above-mentioned pen tube 1 will be described. When the pen holder 2 is assembled, the mounting pieces 22 and 23 at the rear of the pen holder 2 are first fitted and locked in the fitting recess 36 of the tail cap 3, At the same time, the inner edge portion of the pen clamping piece 22a, 23a at the rear end of the pen holder 2 is inserted into the locking groove 39a, 39b of the tail cover (insertion member) 3, and the mounting piece 22 of the pen holder 2, 23, that is, the fitting recesses 36, 37 of the tail cap 3 and the flange portion 35 of the rear end are restrained from axial movement and circumferential rotation, and the outer sides of the mounting pieces 22, 23 and the tail cover 3 are simultaneously The outer wall of the cylindrical crotch portion 31 is integrated on the same plane, and the pen holder 2 can be kept in a state in which the rear end base portion is mounted and positioned on the cylindrical crotch portion 31 of the tail cap 3. In this state, the above-mentioned cylindrical jaw portion 31 can be formed between the cylindrical crotch portion 31 of the tail cap 3 and the pen holder 20 by the pen clamping legs 22a, 23a at the rear end of the pen holder 2. The gap portion in the end portion after the pen tube 1 is inserted.

Inserting the insertion portion 30 of the tail cap 3 at the rear end of the clip 2 as described above into the rear end of the pen tube 1 while aligning the pen grip pieces 22a, 23a at the rear end of the pen holder 2 with the pen When the slits 12 and 13 at the rear end of the tube 1 are inserted, the curved base portion 21 at the rear end of the pen holder 2 can be fitted into the notch portion 11 at the rear end of the pen tube 1, and the flange portion 35 of the tail cap 3 is When the entire mounting pieces 22, 23 of the rear end of the pen holder 2 that have been fitted and locked to the fitting recesses 36, 37 of the tail cap 3 are inserted along the inner peripheral surface of the pen tube 1, the pen tube is abutted. At the time of the end face, the locking portion 14 of the pen tube 1 also completes the action of locking the locking projection 38 of the tail cap 3 at the same time. The pen holder 2 and the tail cap 3 are locked and positioned at the rear end of the pen tube 1 to be integrated, and the installation is completed.

The pen clip mounting structure of the pen as described above is formed only by fitting the mounting pieces 22, 23 formed at the rear portion of the pen holder 2 to the cylindrical crotch portion 31 of the tail cap (insertion member) 3. After the fitting recesses 36 and 37 are fitted, in this state, the insertion portion 30 of the tail cap 3 is inserted into the rear portion of the pen tube 1 while the base portion (curved base portion) 21 of the rear end of the pen holder is fitted into the rear end of the pen tube 1. The easy operation of the notch portion 11 allows the pen holder 2 to be attached to the rear end of the pen tube 1 in a state where the flange portion 35 of the tail cap 3 is pressed against the rear end of the pen tube 1. In the mounted state of the clip 2, the mounting pieces 22, 23 of the pen holder 2 and the insertion portion 30 of the tail cap 3 are all housed in the pen tube 1, and on the outer side of the pen tube 1, only the pen holder 20 is provided. The flange portion 35 of the tail cap 3 is exposed, so that the appearance of the outer shape of the pen can be ensured.

Further, when the flange portion 35 of the tail cap 3 abuts against the rear end of the pen tube 1 as described above, the locking projection 38 of the tail cap 3 is automatically locked to the pen tube 1 inside the pen tube 1 Since the locking portion 14 is fastened, the rear base portion of the pen holder 2 can be firmly attached to the rear portion of the pen tube 1.

Further, when the tail cap 3 is inserted into the rear portion of the pen tube 1, as long as the pen-clip pieces (neck) 22a, 23a are pushed into the slits 12, 13 of the pen tube 1, the slits 12, 13 can Since the locking projection 38 of the tail cap 3 guides the direction in which the locking portion 14 is locked, the locking projection 38 can be smoothly and surely locked to the locking portion 14.

In addition, when the pen holder 2 attached to the pen tube 1 is to be inserted into a pocket or the like, the pen-clip pieces 22a and 23a at the rear end of the pen holder 2 serve as fulcrums so that the full length of the pen holder 20 can be folded into a pocket or the like. The pen holder between the pen and the pen tube 1 can be clipped in depth, and therefore, the pen holder 2 is not easy to be taken out of the bag or the like, and the stability of the pen holder 2 can be improved.

Further, in the first embodiment, the means for locking the tail cover (insertion member) 3 inside the pen tube 1 is formed by the locking portion 14 formed on the inner wall of the pen tube 1, and formed in the tail cover 3 The locking projection 38 of the outer wall of the cylindrical portion 31 is formed, and if the reverse projection 38 is formed on the inner wall of the pen tube 1 and the locking portion 14 is formed in the cylinder of the tail cap 3 The outer wall of the portion 31 can also be used. In this case, the same locking effect as described above can be exerted.

[Embodiment 2]

The thirteenth to fifteenth drawings show the pen holder mounting structure of the writing instrument according to the second embodiment of the present invention. In this embodiment, the same portions or equivalent portions as those shown in the first to thirteenth drawings are given the same. Symbols, and no longer repeat the instructions.

In the above embodiment, the end portion of the pen tube 1 is formed with a notch portion 11, and the insertion member 3 used is a tail cap 3 having a flange portion 35 at the rear end. However, in the second embodiment, the use is not provided. The pen tube 1 of the notch portion 11 is used, and the insertion member 3 is omitted from the flange portion 35, so that the entire cylindrical body 31 in the rear portion of the pen tube 1 can be inserted.

In the second embodiment, the pen tube 1 is formed with a slit (the neck) 22a, 23a of the stylus holder 2 extending axially forward from the rear end of the pen tube 1 into the slit 12 Further, a structure for locking the locking portion 15 at the front end of the cylindrical body 31 is formed in the inner wall portion of the pen tube 1.

Further, the cylindrical body 31 which is inserted into the inside of the rear end of the pen tube 1 as the insertion member 3 has an inner diameter which is slightly the same as the inner diameter of the pen tube 1 and which forms the fitting recesses 36, 37 at the intermediate portion of the outer wall. structure.

According to the second embodiment, when the pen holder 2 is to be assembled, as in the first embodiment, the mounting 22, 23 of the pen holder 2 is first fitted into the fitting recesses 36, 37 of the cylindrical body 31, thereby being embedded therein. The recessed portions 36 and 37 restrain the axial movement and the circumferential movement of the attachment pieces 22 and 23, and also the outer surfaces of the attachment pieces 22 and 23 are in contact with the outer wall of the cylindrical body 31 on the same plane. Then, the rear portion of the pen holder 2 is assembled and assembled to the cylindrical body 31, and the cylindrical body 31 in this state is inserted into the rear portion of the pen tube 1, and the pair of pen clamping pieces 22a and 23a are paired. After the slits 12 and 13 of the pen tube 1 are inserted, the entire cylindrical body 31 is pushed into the interior of the pen tube 1. The front end of the cylindrical body 31 is locked to the locking protrusion 15 of the inner wall of the pen tube 1 Positioning. By this assembly, the entire cylindrical body 31 is housed in the pen tube 1, and the rear portion of the pen holder 2 is attached and fixed to the rear portion of the pen tube 1 to complete the assembly.

According to the pen clip mounting structure of the pen according to the second embodiment, the slits 12 and 13 and the locking projections 15 of the inner wall may be formed at the rear portion of the pen tube 1. As for the insertion member 3, the cylindrical body 31 may be used. The fitting recesses 36 and 37 may be formed on the outer wall thereof. Therefore, the structure is simplified, and the processing cost of the pen tube 1 and the insert member 3 can be further reduced.

[Embodiment 3]

According to the third embodiment, as shown in the sixteenth and seventeenth embodiments, the pen holder mounting portion 10 of the pen tube 1 is formed by forming a notched portion 11A having a planar concave notch shape only at the rear portion of the pen tube 1. All of the pen-clip pieces 22a and 23a of the pen holder 2 are fitted into the notch portion 11A, and the outer side faces of the pen-clamping pieces 22a and 23a abut against the inner faces of both sides of the notch portion 11A to lock the positioning.

According to the third embodiment, since the notch portion 11A having the in-plane concave shape is formed only in the rear portion of the pen tube 1, the processing cost of the pen tube 1 can be further reduced.

[Possibility of industrial use]

As described above, according to the pen clip mounting structure of the pen of the present invention, the pen tube for mounting the pen clip only forms a slit for the neck portion of the mounting piece provided on both sides of the rear portion of the pen holder, and is used for The insertion member or the tail cap inserted into the rear portion of the pen tube may be formed only by the outer wall of the insertion member for the fitting recess in which the attachment piece is fitted and locked. Therefore, the structure of the pen tube and the structure of the insertion member are very simple, so that The processing of the above-mentioned pen tube and the above-mentioned insert member is easy, and the processing cost of such members can be reduced.

In particular, the present invention is configured such that the mounting piece formed on the pen holder is fitted into the fitting recess of the insertion member, and the insertion member in this state is inserted into the rear portion of the pen tube to be integrated into one body, so that the pen can be extended. The depth of insertion of the pockets and the like into the gripping portion can improve the stability of the gripping of the pen holder to the pocket, etc., and the utility model can be put into practical use.

1. . . Pen tube

2. . . Pen holder

3. . . Insert member (tail cover)

10. . . Pen holder installation

11,11a. . . Notch

12,13. . . Slit

14. . . Clamping part

15. . . Locking projection

20. . . Pen clip

twenty one. . . Curved base

22,23. . . Mounting piece

22a, 23a. . . Pen clip foot (neck)

30. . . Insertion

31. . . Cylinder part

32,33. . . Arm piece

34. . . Ring

35. . . Annular flange

36,37. . . Fitting recess

38. . . Locking projection

39a, 39b. . . Locking groove

1 is an exploded perspective view showing a pen clip mounting structure of a writing instrument according to Embodiment 1 of the present invention;

The second figure shows a perspective view of the state in which the pen holder in the first figure has been assembled to the tail cap;

The third figure shows a top view of the pen tube in the first figure;

The fourth figure shows a cross-sectional view taken along line A-A of the third figure;

Figure 5 is a cross-sectional view taken along line B-B of the fourth figure;

The sixth figure shows a side view of the pen holder in the first figure;

The seventh figure shows the bottom view of the sixth figure (bottom view);

Figure 8 is a partial perspective view showing the rear end portion of the pen holder of the sixth figure;

Figure 9 is a plan view showing the tail cover in the first figure;

The tenth figure shows a side view of the ninth figure;

Figure 11 is a cross-sectional view taken along line C-C of Figure 9;

Figure 12 is an enlarged cross-sectional view taken along line D-D of the tenth figure;

Figure 13 is a side elevational view showing the main portion of the pen holder mounting structure of the pen according to the first embodiment of the present invention, showing the pen tube in a cross-sectional state;

Figure 14 is a cross-sectional view showing the E-E line of the thirteenth figure;

The fifteenth figure shows a top view of the main part of the pen tube in the thirteenth figure;

Figure 16 is a radial sectional view showing the main part of the pen holder mounting structure of the pen tube form of the pen tube according to the present invention;

Fig. 17 is a plan view showing the main part of the pen tube in Fig. 16.

1. . . Pen tube

2. . . Pen holder

3. . . Insert member (tail cover)

10. . . Pen holder installation

11. . . Notch

12,13. . . Slit

14. . . Clamping part

20. . . Pen clip

twenty one. . . Curved base

twenty three. . . Mounting piece

23a. . . Pen clip foot (neck)

30. . . Insertion

31. . . Cylinder part

32,33. . . Arm piece

34. . . Ring

35. . . Annular flange

36,37. . . Fitting recess

38. . . Locking projection

39a, 39b. . . Locking groove

Claims (3)

A pen clip mounting structure for a pen, comprising a pen tube, a pen holder attached to a rear portion of the pen tube, and an insert member inserted inside the rear end of the pen tube; wherein the end portion of the pen tube is formed a pen holder mounting portion for engaging the locking portion at a rear portion of the pen holder; and a mounting piece bent along a direction of an inner circumferential surface of the pen tube is formed at both sides of the rear portion of the pen holder; and the outer wall of the insertion member is Forming a fitting recess in which the mounting piece of the pen holder is fitted and positioned; and mounting the pen holder by inserting and fitting the pen holder into the fitting recessed portion of the inserting member Inserting the insertion member into the rear end portion of the pen tube so that the rear portion of the pen holder is fitted into the pen holder mounting portion of the pen tube, and the insertion member is locked and positioned inside the pen tube to form an integral structure with the pen tube The pen holder mounting portion of the pen tube includes a slit formed in the axial direction of the pen tube at the rear portion of the pen tube and inserted into the neck of the mounting piece on both sides of the rear portion of the pen holder; the above-mentioned insertion member is The locking device positioned inside the rear end of the pen tube includes a locking portion formed on one of an inner wall of the pen tube and an outer wall of the insertion member, and is formed on the other side of the pen tube and the insertion member The locking protrusions. The pen clip mounting structure of the pen of claim 1, wherein the pen holder mounting portion of the pen tube further comprises a notch formed at a rear portion of the pen tube for embedding a rear portion of the pen holder. The pen clip mounting structure of the pen of claim 1, wherein the rear portion of the insert member forms an annular flange portion that can abut the rear end of the pen tube, and the locking protrusion is attached to the annular flange When the portion abuts against the position of the rear end of the pen tube, the locking is positioned at the locking portion.