JPH0825877A - Mechanical pencil - Google Patents

Abstract

PURPOSE:To easily confirm the breakage by forming a barrel of transparent material and coloring a lead holding member corresponding to a core diameter or a color. CONSTITUTION:A transparent end member 2 is mounted at the end of a barrel 1 by screwing, etc. A colored lead holding member 6 for preventing the dropping, the return of a lead L at the time of feeding the lead is press injected forward at a chuck 3 in the member 2. When the color of the member 6 is differentiated according to the lead diameters, at the time of assembling, even if other type of lead holding member 6 is mixed, it can be instantaneously identified according to the color of the member 6. For instance, even when various lead color core L is used, the mechanical pencil to be used by transparentizing the barrel 1 to be easily identified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sharp pencil in which a lead core feeding mechanism for feeding a lead core and a lead holding member for holding the lead core are arranged inside a barrel.

[0002]

2. Description of the Related Art Generally, a barrel of a writing instrument such as a sharp pencil is colored in order to improve its appearance. A lead core feeding mechanism such as a three-piece chuck mechanism or a ball chuck mechanism for feeding the lead core is slidably arranged inside the barrel. In front of the lead core feeding mechanism, a lead holding member is arranged to prevent the lead core from retracting or dropping due to its own weight when the lead core is fed. Further, on the surface of the barrel, a seal for indicating the core diameter of 0.3 mm, 0.5 mm, or 0.7 mm is attached to identify the diameter of the lead core to be used, It is printed directly on the surface. And, of course, a core holding member corresponding to the seal and the display of the printed number is arranged on the barrel.

[0003]

However, the above-mentioned prior art has the following problems. First, the breakage of the lead core (hereinafter also referred to as the residual core) separated from the chuck cannot be recognized by the coloring of the barrel. In other words, there is a feeling of strangeness when the lead core rotates when writing with the remaining core,
Moreover, if the product is forcibly used without being broken in the shaft cylinder, especially between the core holding member and the projecting opening, the core holding member and the like will be damaged and centering will be defective. . Second, it is not possible to immediately identify sharp pencils with different core diameters. Particularly, a person who draws a drawing needs several kinds of core diameters, and accordingly, several sharp pencils are also required. As described above, in order to distinguish the required core diameter from the sharp pencil of the same shape, it is necessary to look at the core diameter indication described on the seal one by one. It is also possible to purchase different types (shapes) of sharp pencils, but the fit to your finger,
Considering the easiness of writing, it is still better to use the same type and shape.

Third, there is a mistake in inserting the core holding member corresponding to the core diameter. In other words, at the time of assembly, the core holding member corresponding to the difference in the core diameter is inserted into the shaft cylinder, but the color and the outer shape of the core holding member are substantially constant regardless of the core diameter. The member is inserted into the barrel (for example, 0.
0.7 m when assembling a sharp pencil with a core diameter of 5 mm
m core holding member may be inserted). If the wrong lead holding member is inserted, the lead core may drop from the tip of the sharp pencil by its own weight, or conversely, the lead core may not be able to be drawn out. Fourthly, the production cost becomes high. In other words, since the seal with the core diameter is attached so that the core diameter to be used can be known, the cost of the seal and the work for attaching the seal are incurred. Therefore, the product itself is expensive.

[0005]

The present invention has been made in view of the above problems, and a lead core feeding mechanism for feeding a lead core and a lead holding member for holding a lead core are provided inside a barrel. It is a sharp pencil arranged, and the gist is that the shaft cylinder is formed of a transparent material, and the core holding member is colored corresponding to a core diameter or a core color.

[0006]

[Function] The core diameter to be used can be specified by the color of the core holding member, which is essential for the lead core feeding mechanism.

[0007]

【Example】

A transparent tip member 2 is attached to the tip of the barrel 1 by screwing or the like, but the tip member 2 may be integral with the barrel 1. A lead core L feeding mechanism 5 including a chuck body 3 for feeding the lead core L, a chuck ring 4 for expanding the chuck body 3 and the like is slidably arranged inside the barrel 1. Further, inside the tip member 2, in front of the chuck body 3, the lead core falls when the lead core is fed out,
A colored core holding member 6 for preventing return and the like is press-fitted. Although the reference numeral 7 is a lead protection tube press-fitted into the tip of the tip member 2, it may be integral with the tip member 2.

As the material of the tip member 2, there are resin materials such as polypropylene, vinyl chloride, and acryl butadiene styrene which are transparent in a non-colored state, but nylon and polycarbonate are used to enhance the transparency. It is preferable to use polymethylpentene, butadiene styrene, PET, transparent polyamide, polyarylate, polyarylate-modified resin and the like.

Generally, the material of the core holding member is
The nitrile butadiene rubber is not limited to this, but may be silicon rubber, ethylene propylene terpolymer, or ethylene propylene rubber. As a material for coloring the core holding member, for example, a dye such as Japanol Fast Black D Conc (CI.
Direct Black 17), Water Black 100
L (same 19), water black L-200 (same 1)
9), Water Black # 7 (19), Kayaset Black W9 (19), Direct Fast Black B (22), Direct Fast Black AB (3)
2), Direct Deep Black EX (38 same), Direct Deep Black (38 similar product), Direct Fast Black Conc (51 same), Kayaras Supra Ray VGN (71 same), Kayak Direct Brilliant Yellow G (CI. Direct) Yellow 4) Direct Fast Yellow 5GL (same as 26), Eisenburg Mello Yellow GCLH (same as 44), Direct Fast Yellow R
(Same 50), Aizen Direct Fast Red FH
(CI. Direct Red 1), Nippon Fast Scarlet GSX (4), Direct Fast Scarlet 4BS (23), Eisen Direct Durin B
H (31), Direact Scarlet B (3)
7), Kayak Direct Scarlet 3B (same as 39),
Aizen Brimula Bin Conc 2 BLH (same 75), Sumi Light Red F3B (same 80), Aizen Brimula Red 4BH (same 81) Kayaras Sprabin BL (same 8)
3), Kayaras Light Red F5G (same 225), Kayaras Light Red F5B (same 226), Kayaras Light Rose FR (same 227) Direct Sky Blue 6B
(CI. Direct Blue 1), Direct Sky Blue 5B (15), Benzo Brilliant Sky Blue 8
GS (same 41), Sumilite Supra Blue BRR Conc (same 71), Diborgent Tycoons Blue S (same 8)
6), Water Blue # 3 (86), Kayala Star Coise Blue GL (86), Daiwa Blue 215H
(Same 87), Kayaras Supra Blue FF2GL (Same 10)
6), direct dyes such as Kayaras Supra Blue FFRL (108) and Kayaras Supra Turquoise Blue FBL (199), Acid Blue Black 10B (CI. Acid Black 1), Nigrosine (2) and Water Black R455 (108). Same as 2), Water Black R51
0 (same 2), Suminol Milling Black 8BX (same 2)
4), Kayanor Milling Black VLG (26),
Kayanor Milling Black BR Conc (31), Mitsui Nylon Black GL (52), Eisen Opal Black WH Extra Conc (52), Sumilan Black WA (52), Lanyl Black BG Extra Conc (107), Kaya Knoll Milling Black T
LB (109), Suminol Milling Black B (109), Kayanor Milling Black TLR (11)
0), Eisen Opal Black New Conc (11)
9), Water Black 187-L (154 same) Acid Yellow # 10 (CI. Acid Yellow 1), Kayak Acid Brilliant Flavin FF (7: 1 same), Kayasil Yellow GG (17 same), Xylene Light Yellow 2
G140% (17), Suminol Leveling Elone NR (19), Water Yellow # 1 (23),
Daiewa Tartrazine (25), Kayaktorrazine (23), Suminol Fast Yellow R (25), Diacid Light Yellow 2GP (29), Suminol Milling Yellow O (38), Suminol Milling Yellow MR (42), Water Yellow # 6 (42),
KayaNol Yellow NFG (49), Suminol Milling Yellow 3G (72), Suminol Fast Yellow G
(Id. 61), Suminol Milling Yellow G (Id. 78),
Kayanol Yellow N5G (110 same), Suminol Milling Yellow 4G 200% (141 same), Kayanol Yellow NG (135 same), Kayanol Milling Yellow 5GW
(Id. 127), Kayanor Milling Yellow 6GW (Id. 1
42), Sumitomo Fast Scarlet A (CI. Acid Red 8), Kayak Silk Scarlet (Same 9),
Solar Rubin Extra (14), Daiwa New Coccin (18), Water Scarlet (1)
8), Daiwa Red No. 102 (same 18), Aizen Bonso RH (same 26), Daiwa Red No. 2 (same 27), Suminol Leveling Brilliant Red S3B (same 35),
Kayasil Rubinol 3GS (37), Eizen Erythrosine (51), Kayaqua Acid Rhodamine FB (52), Daiwa Red No. 106 (52), Suminol Evering Rubinol 3GP (57), Diacide Alizarin Rubi Nord F3G 200% (82), Alizarin Rubinol 5G (83), Eisen Eosin GH
(Same as 87), Water Red # 2 (same as 87), Daiwa Red 103WB (same as 87), Water Pink # 2 (same as 92), Aizen Acid Phloxine PB (same as 92),
Daiwa Red No. 104 (92), Rose Bengal (9)
4), Kayanor Milling Skarut FGW (11
1), Kayanor Milling Rubin 3BW (same as 129),
Suminol Milling Brilliant Red 3BN Conc (131), Suminol Milling Brilliant Red BS (138), Eisen Opal Pink BH (1)
86), Suminol Brilliant Red B Conc (2
49), Kayaqua Acid Brilliant Red 3BL (254), Kayak Acid Brilliant Red BL (265), and Kayanor Milling Red GW (27)
6), Mitsui Acid Violet 6BN (CI. Acid Violet 15), Mitsui Acid Violet BN (17), Water Violet # 1 (4)
9), Water Violet # 5 (49), Daiwa Purple No. 1 (49), Ink Violet L10 (4)
9), Sumitomo Patent Pure Blue VX (CI. Acid Blue 1), Water Blue # 106 (Same 1),
Patent Blue AF (7), Water Blue # 9
(Same as 9), Daiwa Blue No. 1 (Same as 9), Ink Blue L2
0 (same 9), Supranol Blue B (same 15), Water Blue # 116 (same 15), Orient Solve Blue OBC (same 22), Orient Solve Blue OB
X (22), Suminol Leveling Blue 4GL (23), Mitsui Nylon Fast Blue G (25),
Kayasil Blue AGG (40), Kayasil Blue BR
(Ibid. 41), Mitsui Alizarin Sapphirole SE (Ibid. 4)
3), Suminol Leveling Sky Blue R Extra Conc (62), Mitsui Nylon Fast Sky Blue R (78), Sumitomo Brilliant Indocyanine 6Bh / e (83), Sandlancyanin N-6B3
50% (90), Water Blue # 115 (9)
0), water blue # 105 (same 90), orient solve blue OBB (same 93), spranol cyanine 7BF (same 100), sumitomobrilliant blue 5G (same 103), acid blue (same 103), asilane brilliant. Blue FFR (104), Kayanor Milling Ultra Sky SE (112), Kayanor Milling Cyanine 5R (113), Aizen Opal Cyanine 2GLH (158), Daiwa Guinea Green B (CI. Acid Green 3), Acid Brilliant Milling Green (9), Daiwa Green # 70
(16), Kayanol Cyanine Green G (2)
5), Suminol Milling Green G (27), Water Orange # 17 (CI. Acid Orange 56)
Acid dyes such as, Water Yellow # 2 (CI. Food Yellow 3) and other food dyes, Malachite Green (C
I. 42000), Victoria Blue FB (CI.44)
045), methyl violet FN (CI.4253)
5), basic dyes such as Rhodamine F4G (CI.45160) and Rhodamine 6GCP (CI.45160).

As the pigment, azo pigments, condensed polyazo pigments, phthalocyanine pigments, quinacridone pigments, anthraquinone pigments, dioxazine pigments, indigo pigments, thioindigo pigments, perinone pigments, perylene pigments, etc. Organic pigments, inorganic pigments such as titanium oxide, iron oxide, and carbon black, and inorganic fluorescent pigments such as zinc sulfide, zinc silicate, zinc cadmium sulfate, calcium sulfide, strontium sulfide, and calcium tungstate, and other known organic fluorescent pigments. Is mentioned. Specifically, Fuji. SP. Black. 8031, 811
9, ibid 8167, ibid 8276, ibid 8381, ibid 840
6, Fuji. SP. Red. 5096, 5111,
5193, 5220, Fuji. SP. Borde
aux. 5500, Fuji. SP. Blue. 606
2, same 6133, same 6134, Fuji. SP. Gre
en. 7051, Fuji. SP. Yellow. 40
60, Fuji. SP. Violet. 9011, Fu
ji. SP. Pink. 9524, 9527, Fuj
i. SP. Orange. 534, FUji. SP. B
row. 3074 (Fuji Dye Co., Ltd.), Em
acol. Black. CN, Emacol. Blu
e. FBB, FB, KR, Emacol. Green
n. LXB, Emacol. Violet. BL, Em
acol. Brown. 3101, Emacol. Ca
rmmine. FB, Emacol. Red. BS, E
macol. Orange. R, Emacol. Yel
low. FD, ibid. IRN, same 3601, same FGN, same GN, same GG, same F5G, same F7G, same 10GN, same 1
0G, Sandye. Super. Black. K, C, Sandye. Super. Gray. B, San
dye. Super. Brown. SB, FRL, RR, Sandye. Super. Green. L5
G, GXB, Sandye. Super. Nayv
y. Blue. HRL, GLL, HB, FBL-
H, FBL-160, FBB, Sandye. Su
per. Violet. BL. H / C, BL, San
dye. Super. Bordeaux. FR, San
dye. Super. Pink. FBL, F5B, S
andye. Super. Rubine. FR, San
dye. super. Carmine. FB, San
dye. Super. Red. FFG, RR, B
S, Sadie. Super. Orange. FL, the same R, the same BO, Sandye. Gold. Yellow.
5GR, R, 3R, Sandye. Ywlow.
GG, F3R, IRC, FGN, GN, GR
S, same GSR-130, same GSN-130, same GSN,
10GN (manufactured by Sanyo Pigment Co., Ltd.), Rio. Fa
st. Black. Fx. 8012, 8313, 8
169, Rio. Fast. Red. Fx. 8209,
8172, Rio. Fast. Red. S. Fx. 8
315, 8316, Rio. Fast. Blue. F
x. 8170, Rio. Fast. Blue. FX. 8
170, Rio. Fast. Blue. S. Fx. 83
12, Rio. Fast. Green. S. Fx. 83
14 (all manufactured by Toyo Ink Co., Ltd.), NKW. 300
2, same 3003, same 3004, same 3005, same 300
7, ibid 3077, ibid 3008, ibid 3602, ibid 260
3, 3604, 3605, 3607, 367
7, 3608, 3702, 3703, 370
4, 3705, 3777, 3708 (manufactured by Nippon Fluorescent Co., Ltd.), Cosmocolor S.I. The 1000F series (manufactured by Toyo Soda Co., Ltd.) and the like are listed, and these are used alone or in combination of two or more.

As a coloring method, when the core holding member is molded, it is mixed in a resin in advance and molded, or the molded core holding member is dipped in a colored solution, a dry color or a master. Various methods such as batch, colored pellet, paste color, and liquid color are conceivable. In consideration of easiness of coloring, deterioration of coloring over time, and the like, it is preferable to mix the pigment, which is a colored product, with a resin in advance and then mold the core holding member.

[0013] Next, a method of setting the color of the core hold member for each core size, for example, red Toka yellow against the core diameter of 0.3 mm, relative to the core diameter of 0.5mm And,
Various colors such as blue can be considered for a core diameter of 0.7 mm, and the setting method is appropriate.

If the colors of the core holding members are made different for each core diameter in this way, even if other types of core holding members are mixed in at the time of assembly, it is possible to instantly distinguish them by the colors of the core holding members. .

Further, for example, lead cores of various colors (for example,
Even when yellow, green, red, light blue or the like) is used, by making the barrel transparent, the sharp pencil (core color) to be used can be easily identified. Further, the lead holding member is also colored according to the lead core to be attached, so that when the next lead core is attached, the lead cores of other lead colors are not attached by mistake. By the way, if you attach the green lead core after using the yellow lead core, the powder of the yellow lead core attached to the core holding member will adhere to the surface of the green lead core, and the writing trace will be dirty. It is a thing.

[0016]

The present invention provides a sharp pencil in which a lead core feeding mechanism for feeding the lead core and a lead holding member for holding the lead core are arranged inside the barrel, and the barrel is transparent. In addition to being formed of a flexible material, the core holding member is colored according to the core diameter or the core color, so even if it should break, its breakage can be easily confirmed and it is attached. It is possible to easily determine the core diameter that is present, and it is possible to prevent an error in inserting the core holding member into the tip member.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a sharp pencil of the present invention.

[Explanation of symbols]

 1 Shaft cylinder 2 Tip member 3 Chuck body 4 Chuck ring 5 Lead core feeding mechanism 6 Core holding member 7 Core protection tube L Lead core

Claims (1)

[Claims] 1. A sharp pencil in which a lead core feeding mechanism for feeding a lead core and a lead holding member for holding a lead core are arranged inside a barrel, and the barrel is made of a transparent material. And a core holding member colored according to a core diameter or a core color.
Pupencil.