JP2005125495A - Locking structure of barrel to clip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking structure of a barrel to a clip, which can dispose the clip at a predetermined position. <P>SOLUTION: The locking structure of the barrel to the clip includes a plurality of vertical ribs 75 protruding outward from an outer peripheral surface of an inner cylinder 70 along with a longitudinal direction of the inner cylinder 70. The vertical ribs 75 are engaged with recessed channels formed on an inner peripheral surface of a locking part 24 of a clip body 21, and the clip body 21 is thereby locked to the inner cylinder 70 to be impossible to be rotated in a circumferential direction. A male threaded part 77 is provided forward of a front flange 73, and this male threaded part 77 is engaged to be screwed with a female threaded part 13 formed on an inner peripheral surface of the barrel 10. A front end of the vertical rib 75 becomes a contact part 71 brought into contact with a rear end edge 12 of the barrel 10, and this contact part 71 is brought into contact with the rear end edge 12 of the barrel 10, thereby ending screwing of the inner cylinder 70 with the barrel 10. When this screwing is ended, a gap 90 is formed between the locking part 24 of the clip body 21 and the rear end edge 12 of the barrel 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a clip that is used in a writing instrument and sandwiches an object to be held such as a pocket or a notebook with a shaft tube, and a locking structure between the clip and the shaft tube.

  Many locking structures are known in which a clip is locked to a part of a shaft cylinder. For example, Patent Document 1 exists as an aspect in which the clip is locked to the shaft cylinder.

JP 2003-63192 A

In this patent document 1, the inner cylinder part by which the clip was integrally formed by the rear-end part of the axial cylinder is screwed and latched.
When the clip is integrally formed in this way, the inner cylinder portion, particularly when the inner cylinder portion is screwed in, can be controlled if the size of the inner cylinder portion, particularly the screwed portion that is locked to the shaft cylinder, is tightly controlled. Stops at a predetermined position with respect to the shaft tube, so that the clip can be arranged at a fixed position with respect to the shaft tube.

In the above-mentioned Patent Document 1, the clip and the inner cylinder part are integrally formed. However, the clip and the inner cylinder part are different from each other than the one in which the clip and the inner cylinder part are integrated. In addition, there are many cases that are preferable in terms of function.
This is because the clip is required to have performance such as elasticity, crease resistance, printability, and color display, and the inner cylinder is required from the performance such as strength (screw strength in the case of screwing) and appearance. This is because the required performance differs from each other, and it is possible to enhance the design and function by combining the clip and the inner tube portion that have been given optimum performance. For these reasons, it is desirable that the clip and the inner cylinder part are separate parts.
However, for example, when the clip and the inner cylinder part are separate parts, and they are combined, there is a dimensional error in the longitudinal direction of each. Therefore, the accumulation of these errors causes the clip to be connected to the shaft cylinder. When stopped, there is a risk that the clip will deviate from the intended position. In particular, it is particularly inconvenient when the position of the clip is desired to be a fixed position in design.

Patent Document 2 discloses a clip and an inner cylinder part which are separate parts.
Actual Japanese Utility Model Publication No. 4-44393 In this patent document 2, the clip is locked to the cap by screwing the head crown member into a nut disposed inside the cap. However, in this patent document, there is no problem because the clip and the crown member are rotatably provided in the first place, but if the crown member and the clip are locked so as not to rotate, the clip If there is variation in the thickness of the portion sandwiched between the head crown and the cap, there arises a problem that the head crown rotates more than necessary or the rotation is insufficient. Specifically, if the thickness is too thick, the clip does not reach a predetermined position, and if the thickness is thin, the clip rotates too much beyond the predetermined position.

  Then, this invention makes it a subject to provide the latching structure of the axial cylinder and clip which can arrange | position a clip in a predetermined position, even if a clip and an inner cylinder are separate parts.

A first means for solving the problem is a locking structure of a shaft tube and a clip provided on the rear end side of the shaft tube, and the clip sandwiches an object to be held between the shaft tube. A clip piece and a clip body provided with the clip piece. An inner cylinder is engaged with the rear end of the shaft cylinder by screwing, and a locking portion of the clip body is provided on the inner cylinder. It is locked non-rotatably, and a gap is formed between the locking portion of the clip main body and the rear end edge of the shaft tube at the end of screwing between the shaft tube and the inner tube. Is.
A shaft cylinder refers to a member that houses a refill in its interior or, in the case of a mechanical pencil, houses an internal mechanism of a mechanical pencil. Moreover, it is not restricted to these, The cap etc. which cover the writing tip are also included. The refill generally includes an ink storage tube for storing ink and a writing chip attached to the tip of the ink storage tube. Note that a non-volatile, paste-like or grease-like follower can be provided so as to contact the rear end of the ink.

As a method of forming the gap, in addition to a method of forming a contact portion as described later, a space portion where no member is present without forming the contact portion can be used. This can be achieved, for example, by stopping the inner cylinder at a predetermined depth with respect to the shaft cylinder when the inner cylinder and the shaft cylinder are screwed together. It can also be achieved by stopping the inner cylinder at a predetermined depth by contacting the tip edge of the inner cylinder with a step formed on the inner peripheral surface of the shaft cylinder.
Since a gap is formed between the locking portion of the clip main body and the rear end edge of the shaft tube, the locking portion of the clip does not contact the shaft tube. For this reason, even if there is a dimensional variation in the longitudinal direction at the locking portion of the clip body, this variation does not affect the magnitude of the rotation of the inner cylinder, so the clip can be placed in a predetermined position. It becomes.

In addition to the above means, an abutting portion that abuts the shaft cylinder is formed on the outer peripheral surface of the inner cylinder in front of the locking portion of the clip body, and when the screwing between the shaft cylinder and the inner cylinder ends, the corresponding contact portion Can be brought into contact with the shaft tube, and a gap can be formed between the engaging portion of the clip body and the rear end edge of the shaft tube by the corresponding contact portion.
This means is a more specific version of the first means, in which an abutting portion that abuts on the shaft cylinder is formed on the outer peripheral surface of the inner cylinder, and the abutting portion abuts on the shaft cylinder, A gap is formed between the engaging portion of the clip body and the rear end edge of the shaft tube.
The location where the abutting portion of the inner cylinder abuts on the shaft cylinder may be the rear end edge of the shaft cylinder. For example, a stepped portion may be formed inside the shaft cylinder and contacted with the stepped portion. That is, it is not necessarily limited only to the rear end edge of the shaft tube.

Further, in addition to the above means, a grip portion to be gripped by a user is provided on a part of the shaft tube, and a convex portion protruding outward is formed on the grip portion, and is on an extension line of the clip piece. The convex portion can also be formed.
For example, a convex part may be formed in a grip part for a reason on design. In addition, in order to grasp the remaining amount of ink inside the shaft tube, a transparent or semi-transparent lens-shaped convex portion may be formed on the grip portion of the shaft tube. In such a mode, when the user grips the grip portion, it is assumed that the user grips the grip portion from the viewpoint of ease of gripping. Specifically, it is considered that a convex portion is often positioned between the index finger and the thumb. In this case, if the convex portion is positioned on the extended line of the clip, the clip is also arranged at a position not disturbing writing by grasping the convex portion. As a result, it is possible to give a good grip feeling.

According to the present invention, by providing the clip and the inner cylinder as separate parts, it is possible to enhance the design and function, and provide a locking structure between the shaft cylinder and the clip that can arrange the clip at a predetermined position. It becomes possible.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the present specification, the front refers to the direction in which the writing chip 31 is provided, and the rear refers to the direction in which the clip 20 is provided.

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention. The first embodiment shows a so-called knock-type writing instrument.
In this knock type writing instrument, the refill 30 is housed inside the shaft cylinder 10, and the coil spring 40 is provided between the step provided near the tip of the refill 30 and the tip of the shaft cylinder 10. The refill 30 is biased rearward. When the knock member 50 protruding to the rear end of the shaft cylinder 10 is pressed, the writing tip 31 provided at the front end of the shaft cylinder 10 is formed by pushing the rear end of the refill 30 forward by the rotor 60 interlocking with the knock member 50. Projects from the tip. When the knock member is pressed again, the refill 30 is urged rearward by the coil spring 40 and stored in the shaft tube 10.
Although not shown in detail, the refill 30 includes an ink storage tube 32 and a writing chip 31 provided at the tip of the ink storage tube 32. Ink and pressurized gas are stored inside the ink storage tube 32, and the ink is pushed out by the pressurized gas.

A grip portion 80 that is gripped by the user is formed on the front outer peripheral surface of the shaft tube 10. The clip portion 80 includes a shaft cylinder 10, a soft material 82 that is formed by two-color molding so as to surround the shaft cylinder 10, a through hole 83 provided in a part of the soft material 82, and a shaft extending from the through hole 83. A part of the cylinder 10 is composed of a convex part 81 protruding outward.
Examples of the material of the soft material 82 include rubbers such as silicon rubber and nitrile rubber (NBR), and various elastomers such as olefin, styrene, polyester, and nylon.
The convex portion 81 has a translucent convex lens shape so that the remaining amount of ink in the ink storage tube 32 formed in a translucent shape can be easily seen.
A clip 20 is provided at the rear end of the shaft tube 10, and a sandwiched object such as a pocket of clothes or a notebook is sandwiched between the clip piece 22 of the clip 20 and the outer peripheral surface of the shaft tube 10. ing.

Next, the periphery of the clip 20 will be described with reference to FIG. 2 showing the main part of FIG.
An inner cylinder 70 is inserted from the rear into the rear end of the shaft cylinder 10, and a male screw portion 77 formed on the outer peripheral surface of the inner cylinder 70 is threadedly engaged with the female screw section 13 formed on the inner wall of the shaft cylinder 10. doing.
A rear flange portion 74 is provided at the rear end of the outer peripheral surface of the inner cylinder 70, and a front flange portion 73 is provided in front of the rear flange portion. Between the rear flange part 74 and the front flange part 73, the movement of the locking part 24 of the clip body 21 is restricted and locked in the front-rear direction. As shown in FIG. 5, a portion with a reduced inner diameter is provided behind the clip body 21, and the reduced diameter portion serves as a locking portion 24 with the outer peripheral surface of the inner cylinder 70. Since the locking portion 24 is located between the rear flange portion 74 and the front flange portion 73, when the clip main body 21 is about to move forward, a step portion formed in front of the locking portion 24. When the clip main body 21 is about to move rearward, the rear end edge of the locking portion 24 comes into contact with the rear flange portion 74, so that the clip The rearward movement of the main body 21 is restricted.

As shown in FIG. 3, a plurality of vertical ribs 75 projecting outward from the outer peripheral surface of the inner cylinder 70 along the longitudinal direction of the inner cylinder 70 are provided between the rear flange portion 74 and the front flange portion 73. The vertical rib 75 is fitted into the groove 23 formed on the inner peripheral surface of the locking portion 24 of the clip body 21 shown in FIG. Thus, the clip main body 21 is locked to the inner cylinder 70 so that the rotation in the circumferential direction is impossible.
Note that a locking projection 72 is provided on the side surface of the vertical rib 75, and the locking projection 72 abuts on the side surface of the concave groove 23, thereby preventing the clip main body 21 from rattling. A male screw portion 77 is provided in front of the front flange portion 73, and this male screw portion 77 is screwed into and engaged with the female screw portion 13 formed on the inner peripheral surface of the shaft tube 10.

The front end of the vertical rib 75 serves as a contact portion 71 that contacts the rear end edge 12 of the shaft tube 10, and the contact portion 71 contacts the rear end edge of the shaft tube 10, thereby The screwing with the shaft cylinder 10 is finished. When this screwing is completed, a gap 90 is formed between the locking portion 24 of the clip body 21 and the rear end edge 12 of the shaft tube 10. By setting it as such a structure, the dispersion | variation in the dimension of the longitudinal direction of the clip main body 21 will not influence the latching of the inner cylinder 70 and the axial cylinder 10. FIG.
When such a configuration is not used (when the locking portion 24 of the clip body 21 is brought into contact with the rear end edge 12 of the shaft cylinder 10), for example, when the length of the clip body 21 in the longitudinal direction is longer than a predetermined dimension, When trying to lock the tube 70 to the shaft tube 10, the amount of screwing between the inner tube 70 and the shaft tube 10 becomes insufficient, and the clip piece 22 is disposed in front of a predetermined position. On the other hand, if the length of the clip body 21 in the longitudinal direction is shorter than the predetermined dimension, the amount of screwing between the inner cylinder 70 and the shaft cylinder 10 increases, and the clip piece 22 is disposed at a place past the predetermined position. Become.

In the present embodiment, the contact portion 71 of the inner cylinder 70 is in contact with the rear end edge 12 of the shaft cylinder 10, but is not limited to the rear end edge. It is also possible to form a protrusion or a step on the peripheral surface or the outer peripheral surface, and abut the contact portion 71 on the protrusion or the step. FIG. 10 shows an example in which an enlarged diameter portion 14 having an inner diameter larger than that of the front is formed on the inner peripheral surface near the rear end of the shaft tube 10, and by forming this enlarged diameter portion 14, the front of the enlarged diameter portion 14 is formed. The shaft tube step portion 11 is formed on the surface. Then, a contact portion 71 of a vertical rib 75 formed on the outer peripheral surface of the inner tube 70 is brought into contact with the shaft tube step portion 11. The other elements are the same as those in FIG.
Further, the contact portion does not need to be the tip of the vertical rib 75 as in the present embodiment, and can be, for example, a dot-like protrusion. Further, an annular protrusion such as a front flange portion 73 provided on the outer peripheral surface of the inner cylinder 70 can be used as the contact portion.

Next, a knock mechanism that causes the writing tip to appear and disappear will be briefly described. This knock mechanism is a knock mechanism using a known rotor.
As shown in FIG. 6, on the inner peripheral surface of the inner cylinder 70, an inner cylinder protrusion 93 formed in the longitudinal direction, an inner cylinder cam groove 91 formed between the protrusions 93, and an inner cylinder protrusion An inner cylinder cam surface 92 formed at the tip of 93 is formed. As shown in FIG. 1, a coil spring 40 is built in the shaft cylinder 10, and the refill 30 is accommodated in a state in which it can be moved back and forth while being urged toward the rear end side of the shaft cylinder 10.
As shown in FIG. 7, the rotor 60 includes a rotor protrusion 61 formed in a longitudinal direction inserted into an inner cylinder cam groove 91 formed on the inner peripheral surface of the inner cylinder 70, and the inner cylinder 70. A rotor cam surface 62 formed at the rear end of the rotor protrusion 61 that engages with the inner cylinder cam surface 92 is formed.
As shown in FIG. 8, the knock member 50 includes a knock member protrusion 51 formed at a predetermined interval in the circumferential direction inserted into the inner cylinder cam groove 91 of the inner cylinder 70, and the rotor of the rotor 60. A knock member cam surface 52 that engages with the cam surface 62 is formed.

When the knocking member 50 protruding from the rear end of the shaft tube 10 is pressed from the state in which the writing tip 31 at the tip of the refill 30 is immersed in the shaft tube 10, the rotor 60 is rotated by the knock member cam surface 52 of the knock member 50. After advancing in a state where force is applied, the rotor protrusion 61 of the rotor 60 is disengaged from the cam groove 91 of the inner cylinder 70 and the rotor 60 is slightly rotated, and the rotor cam surface 62 of the rotor 60 is the inner cylinder. The writing tip 31 at the tip of the refill 30 is protruded and held from the tip opening of the shaft tube 10 by engaging with the inner cylinder cam surface 92 of 70.

When the knock member 50 is pressed from the state in which the writing tip 31 at the tip of the refill 30 is projected and held from the tip opening of the shaft tube 10, the rotor 60 is given a rotational force by the knock member cam surface 52 of the knock member 50. After moving forward, the engagement between the rotor cam surface 62 of the rotor 60 and the inner cylinder cam surface 92 of the inner cylinder 70 is released, and after the rotor 60 has slightly rotated, the rotor protrusion of the rotor 60 When 61 enters the inner cylinder cam groove 91 of the inner cylinder 70, the writing tip 31 at the tip of the refill 30 is immersed in the shaft cylinder 10.

In FIG. 9, a convex portion 81 is formed on the extension line of the clip piece 22. In such a writing instrument, since the convex portion 81 becomes an obstacle when gripping, the thumb and the index finger are arranged on both sides of the convex portion 81. In this case, if the clip piece 22 is not in an appropriate position, writing may be obstructed. If gripping is performed when the clip piece 22 is not facing the front as shown in the figure, for example, if it is facing the right side, the clip piece 22 is likely to come into contact with a finger. Resulting in.
If the convex part 81 is formed on the extension line of the clip piece 22 as shown in the figure, the clip piece 22 is positioned so as not to obstruct writing by removing the convex part 81.

  In addition, in the above-mentioned embodiment, although what provided the clip in the axial cylinder used for what is called a knock type writing instrument was demonstrated, it is not restricted to this aspect, It applies to the axial cylinder and cap of a cap type writing instrument. You can also.

It is a longitudinal cross-sectional view which shows the 1st Embodiment of this invention. It is a longitudinal cross-sectional view which shows the principal part of FIG. It is a side view of an inner cylinder. It is a front view of a clip. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4 and shows details of the clip body. It is a longitudinal cross-sectional view of an inner cylinder. It is a front view of the rotor which showed a part in section. It is a front view of the knock member which showed a part in section. It is a front view which shows the 1st Embodiment of this invention. It is a longitudinal cross-sectional view which shows the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Shaft cylinder 11 Shaft cylinder step part 12 Rear end edge 13 Female thread part 14 Diameter expansion part 20 Clip 21 Clip main body 22 Clip piece 23 Groove 24 Locking part 25 Step part 30 Refill 31 Writing chip 32 Ink storage tube 40 Coil spring 50 Knocking member 60 Rotor 61 Rotor protrusion 62 Rotor cam surface 70 Inner cylinder 71 Protruding portion 72 Locking protrusion 73 Front flange portion 74 Rear flange portion 75 Vertical rib 76 Through portion 77 Male thread portion 80 Grip portion 81 Protruding portion 82 Soft material 83 Through-hole 90 Clearance 91 Inner cylinder cam groove 92 Inner cylinder cam surface 93 Inner cylinder protrusion

Claims (3)

A locking structure between a shaft tube and a clip provided on the rear end side of the shaft tube,
The clip consists of a clip piece that sandwiches the object to be held between the shaft cylinder and a clip body provided with the clip piece,
An inner cylinder is engaged with the rear end of the shaft cylinder by screwing,
The inner cylinder is locked with a non-rotatable locking portion of the clip body,
A locking structure between a shaft cylinder and a clip, wherein a gap is formed between a locking portion of the clip body and a rear end edge of the shaft cylinder at the end of screwing between the shaft cylinder and the inner cylinder. An abutting portion that abuts the shaft cylinder is formed on the outer peripheral surface of the inner cylinder in front of the engaging portion of the clip body, and when the screwing between the shaft cylinder and the inner cylinder is finished, the corresponding contact portion is the shaft cylinder. 2. The locking structure between the shaft cylinder and the clip according to claim 1, wherein a gap is formed between the locking portion of the clip body and the rear end edge of the shaft cylinder by the corresponding contact portion. A grip portion to be gripped by a user is provided on a part of the shaft tube, and a convex portion protruding outward is formed on the grip portion, and the convex portion is formed on an extension line of the clip piece. The locking structure of the shaft cylinder and the clip according to claim 1 or 2, wherein

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