JP2001353994A - Device for fitting side-knock type writing implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a side-knock member is moved to be loosened by its own weight or by carrying a writing implement due to the generation of play in fitting the side-knock member. SOLUTION: In a side-knock type writing implement in which by pressing the side-knock member 3 arranged in a window hole 2 formed in the side wall of a shaft cylinder 1 in the diameter direction, a slider 4 installed slidably in the longitudinal direction in the shaft cylinder 1 is advanced against the backward bias force of a spring 7, a means 17 for preventing the side-knock member 3 from being loosened is fitted to a fitting part 14 protruding into the window hole 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting device for a side knock type writing instrument, and more particularly to an attachment device for preventing rattle of a side knock member of a side knock type writing instrument such as a mechanical pencil and a ballpoint pen.

[0002]

2. Description of the Related Art Conventionally, in this type of side knock type writing instrument, a side knock type writing instrument is provided in a window hole formed in a side wall of a barrel.
The side knock member is pressed in the radial direction of the barrel to advance the slider constituting the writing body retracting mechanism, and the writing body is made to protrude and retract from the opening at the tip of the barrel.

[0003]

However, in such a side knock type writing instrument, the rear end of the side knock member projects forward from the rear edge of the window hole so as not to fall out of the window hole of the barrel. It was only pivoted to the department. As a result, play may occur in the mounting of the side knock member, and as a result, the side knock member may move due to its own weight or the carrying of the writing implement, thereby causing rattling. In particular, the knock member of the side knock type writing instrument is arranged at or near the grip portion of the shaft main body so that the knock operation can be easily performed without changing the grip of the barrel during writing, so this rattling during writing is I was worried and actually had trouble writing.

In view of the above, the present invention has been made to solve the above-mentioned conventional drawbacks, and has improved an attachment portion in a window hole of a shaft cylinder to which a side knock member of a side knock type writing instrument is attached, thereby improving the rattling of the side knock member. The object of the present invention is to provide a side-knock type writing instrument mounting device that can perform writing comfortably without having to worry about rattling during writing, while enabling the knocking operation to be reliably performed by preventing the occurrence of knocking. It is.

[0005]

In order to achieve the above object, according to the side knock type writing instrument mounting device of the present invention, the side knock member disposed in the window hole formed in the side wall of the barrel is provided. In a side-knock type writing instrument in which a slider provided so as to be slidable in a longitudinal direction in a shaft cylinder by being pressed in a radial direction is advanced against a rearward biasing force of a spring, rattling preventing means of a side knock member is provided. Is provided on a mounting portion protruding into the window hole of the shaft cylinder.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a side knock type writing instrument mounting apparatus according to an embodiment of the present invention. FIG. 1 is a plan view showing a shaft cylinder in which the mounting device according to the present invention is used. This barrel 1
Is a hollow writing instrument main body such as a mechanical pencil or a ballpoint pen, and comprises a front small diameter portion 11 and a rear large diameter portion 12.

[0007] A male screw 111 is formed on the outer periphery of the front end of the small-diameter portion 11 to be screwed with a leading tool 9 described later. A rectangular window hole 2 is formed in the side wall of the rear large diameter portion 12 in the longitudinal direction, and the thick portions 13 of the barrel 1 on both sides of the window hole 2 are chamfered to the shape shown in the figure. I have.

Next, the configuration of the mounting portion 14 of the barrel 1 to which the side knock member 3 is mounted will be described in detail with reference to the enlarged views of FIGS. A window hole 2 is formed in the grip portion of the barrel 1 in the longitudinal direction. The side knock operation is performed using the window hole 2. That is, the attachment portion 14 to which the side knock member 3 is attached extends forward from the rear edge of the window hole 2.

As shown in FIG. 3, the mounting portion 14 has a step 15 at the front end corner. Further, a tip portion 16 whose upper part descends from the step portion 15 toward the front of the writing instrument is formed. In addition, small projections (dowels) 17 protruding laterally are formed on both side walls of the distal end portion 16, respectively.

Preferably, the shape of the small projection 17 is a hemispherical shape that makes point contact with the inner surface of the upright wall 31 of the side side knock member 3. This is because, when the lid and the side knock member 3 are attached, the bifurcated upright wall 31 is easily pushed open by the shape of the small projection 17 and attached easily.

Next, the structure of the side knock member 3 will be described with reference to FIGS. This side knock member 3
Has a forked structure that is elongated in the longitudinal direction, and the pressing portion 32, which is an operation surface thereof, is formed of a slope portion 33 that is gently descending rearward so as to be easily knocked, and a front corner portion 34 is formed. It is formed in an arc shape. And a bifurcated upright wall 3
A notch 35 for pivoting is formed at the rear end edge of 1.

Further, ridges 36 are provided laterally from the lower edge of the upright wall 31 of the side knock member 3, respectively. The ridge 36 acts as a stopper when attached to the barrel 1, and at the time of knocking operation, the lower end surface of the upright wall 31 of the side knock member 3 faces the upper surface of the inclined portion 41 of the slider 4 described later. It has the function of sliding reliably.
In addition, as is clear from FIG.
A plurality of ribs 37 are formed from below to below.

Therefore, in order to attach the side knock member 3 to the barrel 1, the upright wall 31 of the side knock member 3 is pinched and pressed inward to make the interval slightly narrower, and to reduce After the notch 35 at the end is engaged with the mounting portion 14 of the window hole 2 of the barrel 1 and pivotally attached thereto, the front part of the side knock member 3 is pushed into the barrel 1 to be easily mounted on the barrel 1. I can do it.

At the time of this mounting, the inner dimension between the upright walls 31 of the side knock member 3 (L1 in FIG. 5) is formed slightly smaller than the outer dimension between both small projections 17 (L2 in FIG. 2). The upright wall 31 is attached in a state of being slightly urged outward by the small projections 17 and expanded. Accordingly, the side knock member 3 is free to move and does not rattle during subsequent movement such as carrying.

More specifically, as described above, the side knock member 3 includes the pressing portion 32 and the upright walls 31 formed on both sides of the pressing portion 32, respectively. (L2) is formed to be smaller than the outer dimension (L1) which is the maximum width of the mounting portion 14 of the barrel 1 to which the side knock member 3 is mounted. Specifically, assuming that the inner dimension between the upright walls 31 of the side knock member 3 is 4.30 mm, a suitable fitting degree can be obtained by setting the outer dimension of the portion where the small protrusion 24 is present to 4.60 mm.

FIG. 8 is a longitudinal sectional view of a side knock mechanical pencil provided with the mounting device of the present invention, and FIG. 9 is a transverse sectional view of the knock portion. These figures show a state where the knock is not performed, that is, a state where the side knock member 3 is at the highest position with respect to the barrel 1. In the figure, an opening is formed at the front end of the front part of the barrel 1, and a front end tip is provided to protrude from the opening.

When the side knock member 3 is pivotally attached to the mounting portion 14 of the barrel 1 through the window hole 2 as is apparent from FIG. The upright wall 31 is attached in a state where the inside thereof is urged outward. Accordingly, the side knock member 3 is always applied with an appropriate side pressure, so that the side knock member 3 is not only during the knocking operation but also with or without writing.
The rattling due to the movement of the side knock member 3 is prevented.

As described above, the barrel 1 has a small-diameter portion 11 at the front and a large-diameter portion 12 at the rear. A male screw 11 for screwing with the leading tool 9 is provided on the outer periphery of the distal end of the small diameter portion 11.
1 is formed. An annular projection is formed adjacent to the male screw 111 to prevent the grip cover from slipping. Furthermore, the large-diameter portion 1
A guide rib 18 serving as a stopper for the slider 4, which will be described later, is formed over the inside of the guide 2.

As described above, a vertically long window hole 2 is formed in the middle side wall of the barrel 1, and a side knock member 3 is pivotally attached to the rear end edge of the window hole 2. A hollow slider 4 is provided in the shaft cylinder 1 in the longitudinal direction corresponding to the side knock member 3. That is, an inclined portion 41 that is driven by the front end of the side knock member 3 is integrally formed on the side wall of the slider 4.

Further, a shaft cylinder 1 is provided on the side wall of the inclined portion 41.
A guide groove 42 that engages with the guide rib 18 formed on the inner wall of the slider 4 is formed, and a large-diameter funnel-shaped guiding portion 43 that opens rearward is formed at the rear end of the slider 4. In addition,
When the writing lead is replenished, the guiding part 43 has the lead 4
Acts to be easily introduced into

Next, the rear part of the barrel 1 will be described. The fitting barrel 5 is mounted between the inner wall of the barrel 1 and the guide 43 of the slider 4. That is, the fitting cylinder 5 is provided with a plurality of engaging projections 51 in the longitudinal direction of the rear inner wall.
Sharp guiding portions are formed at the tips of the engaging projections 51, respectively.

Further, a fitting projection 52 is formed at an intermediate portion inside the fitting cylinder 5, and a fitting rib having a sharp tip is formed on a rear outer wall. A cylindrical body 6 with a clip 61 is detachably provided in the fitting cylinder 5.

That is, the cylindrical body 6 has a front end closed and a rear end opened, and a receiving portion for attaching an eraser is formed on the inner periphery of the opening, and the eraser is attached.
Further, a fitting groove is formed on the outer wall of the middle part so as to be able to fit with the fitting projection 52 at the middle part of the inside of the fitting cylinder 5.

The operation of the side knock mechanical pencil using the mounting device according to the above embodiment will be described below. First, when the knock operation member 3 is knocked in the radial direction, the lower end of the tip acts on the inclined portion 42 of the slider 4. At this time, since the inclined portion 42 is descending rearward, the slider 4 is pushed rearward of the spring 7 forward against the urging force.

In this knocking process, the chuck ring loosely fitted to the chuck 8 provided at the front end of the slider 4
The abutment comes into contact with the inner step portion of the inner cylindrical portion, and is released from the chuck 8, the chuck portion is opened, and the writing lead is extended in the tip direction. When knocking is repeated, the core is protruded from the tip, and when knocking is completed, the chuck 8 is urged and retreats to return to the initial position. Since the writing core 8 is closed, the writing core is held by the chuck 8 and becomes in a writable state.

Even during such a knocking operation, the upright wall 31 of the side knocking member 3 is urged outward by the small projections 17 formed on the side wall of the mounting portion 14, so that there is no backlash at all and during writing, The same applies to a mobile phone or the like.

Although the above embodiment has been described with reference to a mechanical pencil, the present invention is not limited to this, and the side knock member 3 such as a side knock ballpoint pen may be used.
It goes without saying that the present invention is also applied to other writing instruments in which is used.

[0028]

According to the side knock type writing instrument mounting device of the present invention, the construction is as described above, so that the structure is extremely simple and the side knock member can be easily mounted. It is possible to prevent rattling of the side knock member, reliably perform the knock operation without generating abnormal noise, and obtain a favorable effect in writing.

[Brief description of the drawings]

FIG. 1 is a plan view of a shaft cylinder showing a mounting device for a side knock type writing instrument according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view of a rear portion of a window hole of the barrel of FIG. 1;

FIG. 3 is a longitudinal sectional view of a rear part of a window hole of the barrel of FIG. 2;

FIG. 4 is an enlarged side view of the side knock member of FIG. 1;

FIG. 5 is a front view of the side knock member of FIG. 4;

FIG. 6 is a rear view of the side knock member of FIG. 4;

FIG. 7 is a longitudinal sectional view of the side knock member of FIG. 4;

FIG. 8 is a longitudinal sectional view of a mechanical pencil in which the side knock type writing instrument mounting device of FIG. 1 is used.

FIG. 9 is a cross-sectional view showing the knock portion of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Window hole 3 Side knock member 4 Slider 5 Fitting cylinder 6 Cylindrical body 7 Spring 8 Chuck 9 Tip

Claims (5)

[Claims] 1. A slider provided slidably in a longitudinal direction in a barrel by pressing a side knock member disposed in a window hole formed in a side wall of the barrel in a radial direction. A side-knock type writing implement for advancing against a rearward biasing force, wherein a rattling preventing means for a side knock member is provided in a mounting portion which protrudes into a window hole of the shaft cylinder. Mounting device. 2. The side knock type writing instrument mounting device according to claim 1, wherein said rattling preventing means comprises projections formed on both sides of a side knock member mounting portion projecting forward from a rear end edge of the window hole. . 3. The shape of the projection is a hemispherical shape that makes point contact with the inner surface of the upright wall of the side-side knock member.
A mounting device for the side knock type writing implement as described in the above. 4. The side knock member comprises a pressing portion and upright walls formed on both sides of the pressing portion, and an inner dimension (L2) between the upright walls is a protrusion of the side knock member mounting portion. 4. The side knock type writing instrument mounting device according to claim 3, wherein the size is smaller than an outer dimension (L1) between the top portions. 5. The mounting device for a side knock type writing instrument according to claim 1, wherein the side side knock member has a plurality of reinforcing ribs formed downward from a bottom surface of the pressing portion.