JPH08258488A - Knock type writing tool - Google Patents

Abstract

PURPOSE: To ensure engagement of a hold section at a rear side of a head end of a clip and a holding means of a barrel so as to prevent erroneous work by providing a biasing means such as a spring in between the clip for holding a writing tool in a pocket of clothes and an internal barrel in the barrel. CONSTITUTION: In using, when a cap 4 or a clip 6 is operated by knocking and an internal barrel 2 is pushed forward against a spring 5, a holding protrusion 6a of the clip moves ahead along a guide groove 1b formed in a barrel 1, it is held by a holding hole 1c and a pen 3 is held in a protruded state. For housing the protruded pen 3b in the barrel 1, the back end of the clip 6 is pressed down toward the barrel 1 or the front end of the clip 6 is pulled up in a direction away from the barrel 1, the clip 6 is rocked with supporting point at a connecting section 2b so as to release the engagement of the holding protrusion 6a and the holding hole 1c. The internal barrel 2 is retracted together with the clip 6 by the restoring force of the spring 5 so as to be housed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knock type writing instrument such as a marking pen, a ballpoint pen, and a mechanical pencil, and more particularly to a knock type writing instrument which holds a writing body in a use state by using a clip by a knocking operation.

[0002]

2. Description of the Related Art Heretofore, as a knock-type writing instrument of this kind, one described in Japanese Utility Model Publication No. 5-25915 has been proposed. FIG. 16 shows the above-mentioned conventional example, in which a refill 13 slidably arranged in a barrel 11, an elastic body 12 for biasing the refill 13 rearward, and the barrel 11 are shown. It is slidably guided and coupled to a guide hole 11a formed in the above, is formed so as to project to the outside of the above-mentioned barrel 11, and is swingable around the root portion 14b as a fulcrum, and a locking projection 14a is provided near the tip. And a clip 14 which is formed at a distance corresponding to the stroke amount of the refill 13 on the shaft cylinder 11 and locks the locking protrusion 14a so that the refill 13 can be locked and retracted. In the axial direction of the stopper 11b and the outer peripheral wall of the shaft cylinder 11,
In addition, the locking projection 14a is formed between the guide hole 11a and the locking portion 11b and engages with the locking projection 14a.
In addition to guiding a to the engaging portion 11b, a guide guide for preventing lateral movement of the tip portion of the clip 14 is provided.

[0003]

However, in such a conventional example, the engagement between the engagement projection on the back side of the clip tip and the engagement portion of the outer cylinder depends only on the elasticity of the clip itself. Even if the user accidentally touched the back end of the clip, the clip was easily unlocked, and the cursive body retracted into the barrel, making it impossible to write.

Further, in the conventional writing instrument, since the clip has a thin flexible portion at the base of the clip in order to obtain the swinging action for locking the clip, the clip is liable to shake laterally and for a long time. When it is used, this part becomes weak, and in an extreme case, it is cut off. Moreover, the locking strength could not be easily adjusted during assembly.

Further, in the conventional example, it is difficult to remove and replace the center rod even if ink or the like needs to be replaced once the center rod holding the writing material is set on the barrel. .

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems, in which a biasing means such as a spring is interposed between the clip and the center shaft, and the engagement on the back side of the tip of the clip is made. An object of the present invention is to securely engage the stopper and the engaging means of the barrel to prevent malfunction.

Further, according to the present invention, since the fragile flexible portion is eliminated to obtain the swinging action of the clip and the biasing means such as the spring is used, the clip can endure long-term use and the biasing force at the time of assembly can be improved. The purpose is to easily adjust the strength and to easily replace the center shaft.

[0008]

In order to achieve the above object, according to the present invention, a guide hole formed in the axial direction and formed in front of the guide hole and in alignment with the guide hole. A shaft cylinder having a locking means, a center shaft that holds the writing body and is slidably provided in the shaft cylinder, and arranged so as to project from the rear of the shaft cylinder; and the center shaft and the shaft cylinder. An elastic body which is provided between the elastic body and urges the center shaft rearward, a connecting means which is slidably provided in the guide hole and which connects the clip and the center shaft, and a connecting means which is connected to the connecting means and is connected to the shaft cylinder. A swingable clip that is disposed outwardly and that has a locking portion that locks the center shaft against the elastic body at a forward position so as to be locked by the locking means on the shaft cylinder side; It is provided between the rear portion of the clip and the center shaft through the guide hole, and is connected to the connecting means. Part knock-type writing instrument comprising consist biasing means comprising urges direction toward the locking portion of the clip to the shaft tube is obtained as a fulcrum.

[0009]

When the knock portion or the clip is operated, the locking portion at the tip of the clip is locked by the locking means formed on the side surface of the barrel, and the center shaft having the writing body is biased to the rear of the elastic body. Hold in the forward position against. Therefore, the writing body at the tip of the center shaft projects from the barrel and is ready for writing.

At this time, the urging means such as a leaf spring provided between the clip and the center shaft is urged in the direction in which the locking portion formed on the back side of the tip of the clip approaches the shaft cylinder. That is, the locking portion is urged in the direction in which it enters into the locking hole that is the locking means, and as a result, the locking becomes reliable, and even if the clip is accidentally touched, the engagement between the two can be easily released. Absent.

[0011]

Embodiments of the knock-type writing instrument of the present invention will be described in detail below with reference to the accompanying drawings. First of all,
1 shows a knock-type writing instrument according to Example 1 of the present invention. FIG. 1 is a vertical cross-sectional view showing a state in which a knock-type writing instrument can be written. In FIG. 1, a center shaft 2 is slidably inserted into a barrel 1. In addition, a writing body 3 including a batting 3a in which ink is soaked inside, and a pen body 3b having a pointed tip and protruding from the central shaft 2 in a shape with a sharp tip, is attached to the central shaft 2. Is held. A cap 4 used as a rear end knock portion is attached to the rear end of the center shaft 2.

More specifically, according to the shape of the pen body 3b according to this embodiment, there is shown a marking pen in which bold letters, medium letters, and fine letters are separately written. That is, the ink soaked into the batting 3a can be written on an object such as paper through the pen body 3b by a capillary action. In the following, the writing body 3 is used to refer to both the felt or batting 3a impregnated with these inks and the pen body 3b. In writing instruments other than the marking pen, such as a ballpoint pen, the writing body 3 refers to ballpoint pen ink and a tip, and a mechanical pencil means a lead delivery mechanism including a lead and a tip pipe.

Further, in FIG. 1, the center shaft 2 is biased rearward by a spring 5 arranged between the inner wall of the tip of the barrel 1 and the front step portion 2a of the center shaft 2. Also, FIG.
As is clear from the above, the rear side wall of the shaft cylinder 1 has a guide hole 1a reaching the rear end edge of the shaft cylinder 1 from the rear, a front guide groove 1b slightly separated from this guide hole 1a, and a front part further separated. The locking holes 1c, which are the locking means, are formed in line with each other. The guide hole 1a is formed with a cutout portion 1d that gradually widens rearward. Detailed functions of each of these will be described later.

Next, a clip 6 is arranged outside the shaft cylinder 1, and a connecting portion 2b which is a connecting means is fitted in the guide hole 1a so as to be slidable in the axial direction. When the knocking is performed, the clip 6 is provided on the side of the barrel 1 that is the back side of the tip of the clip 6.
Is provided with a locking projection 6a as a locking portion capable of locking with the locking hole 1c.

That is, the clip 6 includes the connecting portion 2b of the center shaft 2.
It is loosely fitted to the center shaft 2 via. And this center axis 2
The cap 4 is fitted to the rear end to form a rear end knock portion. Therefore, the center shaft 2 is arranged so as to be slidable in the barrel 1 and projectable from the rear of the barrel 1. As is apparent from FIG. 4, the upper portion of the connecting portion 2b is fitted into the mounting hole 6b of the clip 6 by press fitting and fitting, and as a result, is slidable in the axial direction in the guide hole 1a of the barrel 1. It is provided in.

Further, a gap 7 which is a play is formed between the connecting portion 2b and the clip 6. This gap 7 replaces the fragile flexible portion of the conventional example and works together with the biasing means to enable the swinging action of the clip 6 as described later.

The rear side of the rear end of the clip 6 and the center shaft 2
A leaf spring 8 is interposed between and. More specifically, the leaf spring 8 has one end extending forward along the engaging groove 2c for positioning formed on the side wall of the center shaft 2 and bent toward the clip 6 at a substantially right angle so that the rear portion of the connecting portion 2b is bent. It extends to the back surface of the clip 6 along the end surface. Then, it is gently bent rearward near the back side of the clip 6, and the vicinity of its end is bent forward and is attached to the clip 6.

When assembling the knock-type writing instrument of this embodiment, first, as shown in the drawing, the spring 8 is attached to the clip 6 and the attachment hole 6c of the clip 6 is press-fitted from the head of the connecting portion 2b. After that, with the spring 5 mounted in the barrel 1, the connecting portion 2b of the center rod 2 is connected to the cutout portion 1 of the barrel 1.
It is inserted from d and passes through the cutout portion 1d while being inserted into the guide hole 1a while utilizing the elasticity of the cutout portion 1d to complete the process.

Next, the operation of the knock type writing instrument of this embodiment will be described. In the unused state of FIG. 2, the cap 4 or the clip 6 is knocked to push the center shaft 2 forward against the urging force of the spring 5, and the locking projection 6a of the clip 6 advances along the guide groove 1b. , Reaches the locking hole 1c and is locked in the locking hole 1c. Thus, the center shaft 2 is held in the forward position against the spring 5 (FIG. 3). In this state, the pen body 3b at the tip of the center shaft 2 projects from the barrel 1 to enable writing.

At the time of knocking, the locking projection 6a engages with the guide groove 1b formed at the rear of the locking hole 1c to smoothly advance, and the lateral shake of the clip 6 is prevented.

To store the pen body 3b protruding from the center shaft 2 in the barrel 1, the rear end of the clip 6 is pushed down in the direction of approaching the barrel 1 (arrow X in FIG. 2), or the clip 6 is pushed. When the front end portion of the is pulled up in the direction opposite to the shaft cylinder 1 (arrow Y in FIG. 2), the clip 6 swings around the connection portion 2b as a fulcrum, and the engagement between the engagement projection 6a and the engagement hole 1c is released. To be done.

Then, the center rod 2, the clip 6 and the connecting portion 2b are all moved rearward by the restoring force of the spring 5, and the pen body 3b is retracted into the shaft cylinder 1 to be in a housed state. At this time, the clearance 7 which is a play formed between the clip 6 and the connecting portion 2b fulfills an escape function, so that the elasticity of the spring 8 allows the clip 6 to reliably swing.

Next, FIGS. 7 to 8 show a second embodiment of the present invention.
In the case of this embodiment, on the back side of the rear end of the clip 6, there is provided a fitting protrusion 6b to which the forked part 8a of the leaf spring 8 is fitted from the front. More specifically, the engagement protrusion 6b has a head 6bb.
The forked portion 8a of the leaf spring 8 is securely engaged by b.

9 to 10 show the third embodiment, in which the leaf spring 8 is formed in an S shape, and the forked portion 8 of the leaf spring 8 is formed.
"a" is attached to the attachment projection 6b formed on the back side of the rear end of the clip 6 from the rear side.

Further, FIGS. 11 to 12 show Embodiment 4 in which a stopper portion 6d formed at the rear end of the back side of the clip 6 and a stopper portion 2d formed at the rear portion of the center shaft 2 are
A V-shaped leaf spring 8 is attached. Then, in order to ensure this engagement, a small hole 8b for locking is formed at a corresponding position of the leaf spring 8, and the clip 6 corresponding to these is formed.
On the back side and the center shaft 2 are provided small locking projections 6e and 2e, respectively. The leaf spring 8 may be U-shaped.

Furthermore, FIGS. 13 to 14 show modified examples of the guide hole 3a and the like in FIG. According to this modification, the guide hole 3a for mounting the clip 6 at the rear end of the shaft cylinder 1 has the cutout portion 1a.
The introduction portion 1e is formed continuously with d. A stopper portion 1f is formed in communication with the introduction portion 1e, and the stopper portion 1f has a guide portion 1g at the front. A guide groove 1b is formed so as to be connected to the guide portion 1g, and the locking hole 1c is continuous with the guide groove 1b.
Are formed.

More specifically, the guide hole 3a is formed parallel to and continuous with the stopper portion 1f in the axial direction. The stopper portion 1f is the extension portion 1 that extends forward.
h, and the inside of the extension 1h gradually expands toward the front. Further, the width b of the inlet of the stopper portion 1f is formed larger than the width a of the guiding portion 1g so that the connecting portion 2b can be easily inserted. The connecting side 1i between the guide hole 1a and the guide portion 1g is inclined inward.

FIG. 15 is a longitudinal sectional view of the essential portions showing Embodiment 4 of the present invention. In this embodiment, the clip 6 and the center shaft 2
And are formed in advance in combination. Therefore, according to this embodiment, when the cursive body 3 is worn out, the same operation can be carried out by simply inserting a new set of these from the cutout portion 1d of the guide portion 1a at the rear end of the barrel 1. Can be obtained.

A structure of this kind is shown in FIG.
To incorporate into the shaft cylinder 1 of FIG. 14, insert the guide hole 1a from the rear side, push the connection portion 2b into the cutout portion 1d to push it open, and rotate the clip 6 clockwise beyond the protruding portion 1f. Easy to assemble. Once set, the operation is reliable and it does not accidentally come off. However, if it needs to be removed, it can be easily removed by pushing the clip 6 slightly forward and rotating it counterclockwise. There are some advantages.

In each of the above embodiments, the locking hole 1c is used as the locking means of the shaft cylinder 1 and the locking projection 6a is used as the locking portion of the clip 6, but the invention is not limited thereto. is not. That is, the locking hole 1c as the locking means
In place of the above, as long as a desired clip 6 can be obtained with a locking function, for example, the shaft cylinder 1 side has an inclined surface gradually increasing from the rear to the top, and the front surface is You may form the convex part of a cross section substantially right triangle shape which has an upright locking wall. Further, instead of the locking projection 6a as the locking portion of the clip 6, a locking groove or a locking hole may be provided at the tip of the clip 6 so as to be locked with the above-mentioned convex portion of the shaft cylinder 1.

Further, the example of the leaf spring was given as the urging means of the clip, but the present invention is not limited to this, and an elastic member such as a coil spring or rubber may be used. However, as long as it is a knock-type writing instrument, it can be applied to other ballpoint pens, mechanical pencils, and the like.

[0032]

As described above, according to the present invention,
Since an urging means such as a spring for urging the clip rear end in the direction of separating from the shaft cylinder is interposed between the clip rear part and the center shaft, the locking projection on the back side of the clip tip and the locking hole of the shaft cylinder are The locking can be ensured to prevent malfunction, and the locking strength can be easily adjusted during assembly.

In order to obtain the oscillating action of the clip, a thin flexible portion is eliminated in the connecting portion, a play is formed between the clip and the connecting portion, and the rear end of the clip is urged by a spring or the like, so that a long time is required. It is possible to obtain a durable knock-type writing instrument that can be used.

Further, when the ink or the like is consumed, the center shaft can be easily removed from the barrel and replaced, and so on.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a writable state of a knock-type writing instrument according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing a storage capacity state of FIG.

3 is a perspective view of an essential part showing a writable state of FIG. 1. FIG.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

5 is a plan view of the rear portion of the barrel shown in FIG. 1. FIG.

6 is a cross-sectional view taken along the line BB of FIG.

FIG. 7 is a longitudinal cross-sectional view of a main part showing a writable state of a knock type writing instrument according to a second embodiment of the present invention.

FIG. 8 is an exploded perspective view of the clip and the leaf spring of FIG.

FIG. 9 is a longitudinal sectional view of an essential part showing a writable state of a knock type writing instrument according to a third embodiment of the present invention.

FIG. 10 is an exploded perspective view of the clip and the leaf spring of FIG.

FIG. 11 is a longitudinal sectional view of an essential part showing a writable state of a knock type writing instrument according to Example 4 of the present invention.

FIG. 12 is an exploded perspective view of the clip and the leaf spring of FIG.

FIG. 13 is a plan view showing a modified example of a guide hole or the like on the rear portion of the shaft cylinder.

FIG. 14 is a cross-sectional view taken along the line CC of FIG.

FIG. 15 is a vertical cross-sectional view of a main part showing a fifth embodiment of the present invention.

FIG. 16 is a vertical cross-sectional view showing a state in which a conventional knock-type writing instrument can write.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft cylinder 1a Guide hole 1b Guide groove 1c Locking hole (locking means) 1d Notch part 1e Introductory part 1f Stopper part 1g Guide part 1h Extend part 1i Connection side 2 Middle shaft 2a Step part 2b Connection part (connection means) 2c Locking groove 2d Stopper part 2e Small protrusion 3 Writing material 3a Filling pad 3b Pen body 4 Cap 5 Spring (elastic body) 6 Clip 6a Locking protrusion (locking part) 6b Locking protrusion 6bb Head 6c Mounting hole 6d Stopper part 6e Small protrusion 7 Gap 8 Spring (biasing means) 8a Forked portion 8b Small protrusion

[Procedure amendment]

[Submission date] September 18, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

Next, FIGS. 7 to 8 show a second embodiment of the present invention.
In the case of this embodiment, on the back side of the rear end of the clip 6, there is provided a fitting protrusion 6b to which the forked part 8a of the S-shaped plate spring 8 is fitted from the rear to the front . More specifically, the engaging portion protrusion 6b has a head portion 6bb, and the forked portion 8a of the leaf spring 8 is securely attached by the head portion 6bb.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction content]

9 to 10 show the third embodiment, in which the leaf spring 8 is formed in a U shape, and the forked portion 8a of the leaf spring 8 is formed on the back side of the rear end of the clip 6 from the front to the rear. It is attached to the attached engagement protrusion 6b.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

Furthermore, FIGS. 13 to 14 show modifications of the guide hole 1a and the like in FIG. According to this modification,
A guide hole 1a for mounting the clip 6 at the rear end of the barrel 1 is formed continuously with the cutout 1d to form an introduction portion 1e. And
A stopper portion 1f is formed so as to communicate with the introduction portion 1e, and the stopper portion 1f has a guide portion 1g at the front. A guide groove 1b is formed so as to be connected to the guide portion 1g, and the locking hole 1 is continuous with the guide groove 1b.
c is formed.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

More specifically, the guide hole 1a is formed parallel to and continuous with the stopper portion 1f in the axial direction. Further, the stopper portion 1f has a forward extending portion 1h, and the inside of the extending portion 1h gradually widens forward. Further, the width b of the inlet of the stopper portion 1f is formed larger than the width a of the guiding portion 1g so that the connecting portion 2b can be easily inserted. The connecting side 1i between the guide hole 1a and the guide portion 1g is inclined inward.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

A device having such a configuration is shown in FIG.
To install in the shaft cylinder 1 of FIG. 14, insert the guide hole 1a from the rear side, push the connecting portion 2b into the cutout portion 1d to push open, and rotate the clip 6 clockwise beyond the protruding portion 1h. Easily assembled by. Once set, the operation is reliable and it does not accidentally come off. However, if it needs to be removed, it can be easily removed by pushing the clip 6 slightly forward and rotating it counterclockwise. There are some advantages.

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 13

[Correction method] Change

[Correction content]

Claims (12)

[Claims] 1. A shaft cylinder having a guide hole formed in the axial direction and locking means formed in front of the guide hole and aligned with the guide hole, and a shaft for holding a writing body and a shaft. A center shaft slidably provided in the cylinder and arranged so as to project from the rear of the shaft cylinder; an elastic body provided between the center shaft and the shaft cylinder to bias the center shaft rearward; A connecting means slidably provided in the hole and connecting the clip and the center shaft, and a connecting position connected to the connecting means outside the shaft cylinder and advancing the center shaft against the elastic body. And a swingable clip provided with a locking portion that is locked to the locking means on the side of the shaft so as to be locked, and is provided between the rear portion of the clip and the center shaft through the guide hole. With the connecting portion of the connecting means as a fulcrum, the locking portion of the clip is attached in the direction of approaching the barrel. A knock-type writing instrument characterized in that it comprises a biasing means that is biased. 2. The locking means of the shaft cylinder is a locking hole, the locking portion of the clip is a locking projection, the biasing means is a leaf spring, and the clip and the connecting portion are The knock-type writing instrument according to claim 1, wherein a gap is formed therebetween. 3. The knock-type writing instrument according to claim 2, wherein one end of the leaf spring is engaged with the recess of the clip and the other end of the leaf spring is engaged with the recess of the center shaft. 4. The knock-type writing instrument according to claim 2, wherein the leaf spring is provided in an S shape. 5. The knock according to claim 2, wherein a spring locking convex portion is formed on the back side of the rear portion of the clip, and a forked portion formed at one end of the leaf spring is locked to the spring locking convex portion. Writing instrument. 6. The leaf spring is V-shaped or U-shaped bent backward, and the leaf spring is provided between a clip rear end and a stopper projection formed at a rear portion of the center shaft. Item 2. The knock-type writing instrument according to item 2. 7. A pair of small holes are formed so as to face the bent portion of the leaf spring, and locking projections formed on the rear portion of the clip and the rear portion of the center shaft corresponding to these small holes. 7. The knock-type writing instrument according to claim 6, wherein each of the small holes is locked. 8. The knock-type writing instrument according to claim 1, wherein a guide groove is formed between the guide hole of the barrel and the locking means. 9. The guide hole of the shaft cylinder has an introduction portion having a cutout portion at a rear end, and a stopper portion is formed in parallel with and in communication with the introduction portion, and The knock-type writing instrument according to claim 1, wherein a guide portion is provided in front of the stopper portion. 10. The stopper portion has an extending portion directed toward the front, the inside of the extending portion is gradually expanded toward the front, and the connecting portion between the introducing portion and the guiding portion is an inclined side. The knock-type writing instrument according to claim 9. 11. The knock-type writing instrument according to claim 10, wherein a width of an entrance of the stopper portion is formed to be larger than a width of the guiding portion. 12. The knock-type writing instrument according to claim 1, wherein the writing body, the center shaft, and the clip are integrally formed.