JP2598108Y2 - Side knock mechanical pencil - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a lead-core feeding means which is slidably disposed inside a shaft cylinder, and a sliding block having an inclined surface formed at one end face is disposed in the lead-core feeding means. The present invention relates to a side-knock mechanical pencil in which a knock member is disposed in a window formed in an intermediate portion of a barrel to press the sliding block.

[0002]

2. Description of the Related Art An example of a side knock mechanical pencil is disclosed in Japanese Utility Model Laid-Open No. 3-84189.
Inside the outer shaft, a relay pipe having a chuck attached to the tip and a core case fixed to the rear end is slidably disposed. A slider having an inclined surface formed at one end face and a press-fit hole formed at the center is press-fitted into the relay pipe. In addition, a knock piece is arranged in a window hole formed in an intermediate portion of the outer shaft so as to press the slider.

Next, the operation will be described. When a knock piece is pressed, the knock piece presses the slope of the slider,
The slider moves forward. When the slider is pushed forward, the relay pipe is also pressed, and the chuck operates to advance the lead core with the advance of the relay pipe. Next, an assembling method will be described. First, the slider is pressed into the relay pipe, and then the relay pipe is pressed into the core case. Then, the relay and the lead case into which the slider and the core case are press-fitted are inserted from behind the outer shaft to assemble.

[0004]

However, in the above-mentioned prior art, the slider must be press-fitted into the relay pipe, and the press-fitting operation is troublesome, and when the press-fitting is performed, the slider may be cracked. there were.
Although an attempt was made to form the slider with a soft member that is unlikely to cause cracking, the sliding resistance with the knock piece was increased, so that a large force was required to feed out the lead core, which was not practical.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a lead-core feeding means slidably disposed inside a shaft cylinder, and the lead-core feeding means has one end face. While arranging the sliding block with the inclined surface,
In a side knock type mechanical pencil in which a knock member is disposed in a window hole formed in an intermediate portion of the barrel to press the sliding block, a long groove is formed in a sliding direction of the sliding block, and a sliding groove is formed. From the window hole the size of the block
The gist of the invention is that the size is such that it can be inserted .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Inside a barrel 1, a lead core feeding means 2 is slidably disposed. The lead core feeding means 2 includes:
It comprises a core receiving member 3, a chuck body 4 fixed to the front end of the core receiving member 3, and a chuck ring 5 for opening and closing the chuck body 4. Also, the lead core feeding means 2 is provided with a locking projection 3 a formed on the core receiving member 3.
Is always urged rearward (upward in the figure) by a resilient member 6 having one end locked. Further, a sliding block 8 having a long groove 7 and an inclined surface 7a formed on a rear end face is inserted into the core receiving member 3. In other words, as shown in FIG. 2, the core receiving member 3 is in a state of being fitted into the long groove 7 of the sliding block 8. A window hole 9 is formed in an intermediate portion of the barrel 1 so that the sliding block 8 can be inserted into the window hole 9. The window hole 9 contacts and presses the sliding block 8. Knock member 10 is attached.
Engagement projections 11 and 12 are provided at the front and rear of the knock member 10 to prevent the knock member 10 from falling off when assembled to the barrel 1.

A tip member 14 having a center detent member 13 mounted therein is fixed to the tip of the barrel 1 by screwing or the like, but the tip member 14 may be integral with the barrel. . A clip 15, an eraser 16, and a cap 17 that covers the eraser 16 are provided at the rear end of the barrel 1.
Is attached.

Next, an assembling method will be described. First, a method of assembling the lead core feeding means 2 is as follows. First, the resilient member 6 is dropped from behind the barrel 1, and then the core receiving member 3 is also dropped from behind. Next, in a state where the elastic member 6 is compressed, the chuck body 4 in which the chuck ring 5 is inserted from the front of the shaft cylinder 1 is pressed into the core receiving member 3. Next, the sliding block 8 is inserted through the window hole 9 formed in the middle part of the barrel 1, and is inserted so that the core holding member 3 fits into the long groove 7. At this time, the inclined surface 7 of the sliding block 8
a so that a faces rearward. Finally, knock member 10
From the window hole 9 until the engagement projections 11 and 12 are engaged with the inside of the barrel (see FIG. 3).

Incidentally, as shown in FIGS. 4 and 5, by forming the inside cross-sectional shape of the shaft cylinder 1 to be irregular, the sliding block 8 does not rotate and the assembly becomes easier.
FIG. 4 shows an example in which both sides on the inner side of the barrel 1 are formed into flat (part) 18 , and FIG. 5 shows an example in which a sliding groove 19 is formed in the bottom part of the barrel 1. Also, as shown in FIG.
The anti-rotation effect can be obtained even if the cross-sectional shape of is hexagonal or triangular. Further, when the core receiving member 3 is formed of a pipe-like material such as resin or metal, the top 3b of the core receiving member 3 may be formed of a separate member. FIG. 7 shows another embodiment, in which a core tank 20 is formed by extending the rear of the core receiving member 3. In this example,
The core 21 is interposed in the barrel 1. The assembling method is different from that of the above-described embodiment. First, the chuck body 4 in which the chuck ring 5 is inserted is press-fitted into the core receiving member 3 in which the elastic member 6 is inserted. Next, the assembled lead core feeding means 2 is inserted from the rear of the barrel 1. As described above, various embodiments to which the present invention can be applied have been described in detail, but the point is that the sliding block 8 can be inserted through the window hole 9.

[0010]

According to the present invention, a lead core feeding means is slidably disposed inside a shaft cylinder, and a sliding block having an inclined surface formed at one end face is arranged in the lead core feeding means.
In a side knock type mechanical pencil in which a knock member is disposed in a window hole formed in an intermediate portion of the barrel to press the sliding block, a long groove is formed in a sliding direction of the sliding block, and a sliding groove is formed. From the window hole the size of the block
Since the size is such that it can be inserted , the sliding block can be mounted through the window hole, and therefore a side-knock mechanical pencil that can be easily assembled can be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA corresponding to FIG.

FIG. 3 is a longitudinal sectional view showing an assembling method of the present invention.

FIG. 4 is a cross-sectional view showing another example corresponding to FIG.

FIG. 5 is a transverse sectional view showing still another example corresponding to FIG. 2;

FIG. 6 is a cross-sectional view showing still another example corresponding to FIG. 2;

FIG. 7 is a longitudinal sectional view showing another mounting example of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Lead core feeding means 3 Core receiving member 3a Locking projection 3b Top 4 Chuck body 5 Chuck ring 6 Repellent member 7 Long groove 7a Inclined surface 8 Sliding block 9 Window hole 10 Knock member 11, 12 Engagement projection 13 Center detent member 14 Tip member 15 Clip 16 Eraser 17 Cap 18 Flat part 19 Sliding groove 20 Core tank 21 Core

Claims (1)

(57) [Scope of request for utility model registration] 1. A lead core feeding means is slidably disposed inside a barrel, and a sliding block having an inclined surface formed on one end face is disposed on the lead core feeding means. In a side knock type mechanical pencil in which a knock member is arranged in a window hole formed in an intermediate portion of a shaft cylinder to press, when a long groove is formed in a sliding direction of the sliding block.
In both cases, the size of the sliding block can be inserted from the window hole
A side knock mechanical pencil characterized by its size .