JP2003111611A - Cellular phone strap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cellular phone strap that makes smooth putting out a cellular phone of a pocket, reduce a reception error and has a fine, beautiful and colorful appearance, and is not bulky in the pocket. SOLUTION: The cellular phone strap is made of a braided cord made by elastic yarn as a core and plaited synthetic filament yarns, and a carved ornament.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strap used for a mobile phone.

More specifically, the present invention relates to a strap for a mobile phone which has appropriate elasticity so that it can be smoothly taken out from an inner pocket or a dedicated case when the mobile phone is used and has excellent durability against friction.

[0003]

2. Description of the Related Art Conventionally, a strap of a mobile phone has a strength sufficient to hold the weight of the mobile phone, withstands an excessive handling by a user, and a rigidity necessary for being inserted into a mooring hole of the mobile phone. It is required to do this, and braids made of cotton yarn, hemp yarn or synthetic fiber yarn, flat-tape tape braids, decorative balls made of nylon tex, and beads made of artificial jewelry are used.

Since such a braid has almost no elasticity and solid characteristics, when the mobile phone is taken out of the inner pocket of the clothes when a call is received, the strap is entangled with the mobile phone, or it takes time to take out from the inner pocket. There was a problem of dropping the mobile phone and causing it to malfunction.

Conventionally, there are straps that hang a mobile phone from the neck in addition to the straps that are worn on the wrist. The straps that hang from the neck are useful as a fall prevention device, but have a weight of about 100 g when walking. There was the annoyance that a mobile phone consisting of weight swings right and left just like the pendulum of a watch.

[0006] In Japanese Utility Model Registration No. 3061425, there was disclosed a coil-shaped stretchable cord which is stretchable by using high-strength polyarylate fiber.

[0007] However, such a coil-shaped elastic cord has elasticity, and an operation from a pocket when receiving a call has an advantage that it can be easily dealt with because the coil is instantly extended, but on the other hand, the volume in the pocket is large. was there.

[0008]

DISCLOSURE OF THE INVENTION According to the present invention, the entire strap has appropriate elasticity, and when the mobile phone is taken out of the pocket when the mobile phone is taken out of the pocket, the strap body stretches and can respond quickly, so the call is rushed to end. It is an object of the present invention to provide a strap for a mobile phone, which is capable of solving a problem such as causing an electric shock and does not become bulky when the mobile phone is stored in a pocket.

[0009]

The strap for a mobile phone of the present invention adopts the following means for solving the above-mentioned problems.

That is, the strap for a mobile phone is characterized in that the core yarn is composed of an elastic yarn, the braiding yarn is a synthetic fiber filament yarn, and a braid.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The strap for a mobile phone of the present invention will be described below.

The cellular phone strap of the present invention comprises a braid, in which the core yarn is an elastic yarn and the braiding yarn is a synthetic fiber filament yarn, and a netsuke.

The elastic thread used in the braid of the present invention preferably has rubber-like elasticity, for example, polyurethane elastic thread and the like.

In such a polyurethane elastic yarn, polytetramethylene ether glycol or the like is used as a soft segment and diphenylmethane- is used as a hard segment.
Diisocyanates such as 4,4 diisocyanate and polyether-based ones having a low molecular weight difunctional hydrogen compound as a main constituent as a chain extender, or long-chain diols such as copolyester diol as a soft segment, and diphenylmethane as a hard segment. 4,4
As a diisocyanate such as diisocyanate and a chain extender, a polyester-based one having a low molecular weight difunctional hydrogen compound as a main constituent is preferably used.

Further, polytetramethylene ether glycol is used as the soft segment, and polyether ester type ones having polybutyl terephthalate as the main component as the hard segment are also preferably used.

In the present invention, it is preferable to use polyurethane elastic yarn from the viewpoint of imparting desired high stretchability to the final product.

The polyurethane elastic yarn used in the present invention is
A polyurethane solution is prepared by dissolving a polyurethane polymer in a solvent, and the polyurethane solution is spun by a dry spinning method, a melt spinning method, a wet spinning method, or the like, and an anti-adhesive agent or a smoothing agent is added in order to facilitate the use in post-processing. It can be obtained by appropriately depositing an oil agent of a mineral type or a silicone type, which contains additives such as an accelerator, or a mixture thereof, on the surface of the yarn, and then winding it by a winding machine.

The polyurethane polymer dissolved in the solvent is
Two types of segments: (a) long chain polyethers,
It is composed of a soft segment which is a polyester segment and (b) a hard segment which is a relatively short chain segment derived by the reaction of an isocyanate and a diamine or diol chain extender.

As the soft segment, those derived from tetramethylene glycol, 3-methyl-1,5-pentanediol, tetrahydrofuran, 3-methyltetrahydrofuran, and copolymers thereof are preferable. Polyethers derived from methylene glycol are particularly preferred.

Other soft segments include
A reactive product of (a) ethylene glycol, tetramethylene glycol, 2,2-dimethyl-1,3-propanediol and the like and (b) a dibasic acid such as adipic acid and succinic acid is also preferable, and polyether and polyester are further preferable. Or from or poly- (pentane-1,5-carbonate)
Also preferred are copolymers such as polyetheresters formed from diols and polycarbonate diols such as poly- (hexane-1,6-carbonate) diol.

On the other hand, as a hard segment, a screw-
(P-isocyanatophenyl) -methane (hereinafter, MD
Abbreviated as I), tolylene diisocyanate (hereinafter, T)
DI), bis- (4-isocyanatocyclohexyl) -methane (hereinafter abbreviated as PICM), hexamethylene diisocyanate, 3,3,5-trimethyl-5-methylenecyclohexyl diisocyanate, and other organic diisocyanates are preferable. . Among them, especially MDI
Is preferred.

As the chain extender, ethylenediamine,
Diamines such as 1,3-cyclohexanediamine and 1,4-cyclohexanediamine are suitable for forming polyurethane urea.

It is also preferred to include a chain terminator in the reaction mixture to control the final molecular weight of the polyurethaneurea. As such a chain terminator, a monofunctional compound having active hydrogen such as diethylamine is preferable.

As the chain extender, ethylene glycol, 1,3-propanediol, 4-butanediol, neopentyl glycol, 1,2-propylene glycol, 1,4-cyclohexanedimethanol, 1,4
Diols such as cyclohexanediol, 1,4-bis (β-hydroxyethoxy) benzene, bis (β-hydroxyethyl) terephthalate and paraxylylenediol are also preferred for forming polyurethanes.

The diol is not limited to one kind of diol but may be composed of plural kinds of diols.

Further, it may be used in combination with a compound having one hydroxyl group which reacts with an isocyanate group. in this case,
As a method for obtaining such a polyurethane polymer, various methods such as a melt polymerization method and a solution polymerization method can be adopted and are not limited. The formulation of the polymerization is also not particularly limited, and for example, a method of synthesizing a polyurethane polymer by simultaneously reacting a polyol, a diisocyanate, and a chain extender composed of a diol is preferable,
Either method may be used.

The polyurethane polymer used in the present invention includes benzotriazole-based UV absorbers, hindered amine-based weathering agents, hindered phenol-based antioxidants, various pigments such as titanium oxide and iron oxide, and sulfuric acid. It is also preferable to include a functional additive containing barium, zinc oxide, cesium oxide, silver ions, or the like.

In the present invention, the polyurethane polymer is preferably dissolved in a solvent to obtain a polyurethane solution.

[0029] As a solvent for preparing the polyurethane solution, N, N- dimethylacetamide (hereinafter, DMA _C
Abbreviated), dimethylformamide, dimethylsulfoxide and the like are preferably used. In particular, DMA _C is preferably used.

From the viewpoint of spinnability and the like, the concentration of the polyurethane solution is 30 to 40% by weight based on the total weight of the solution.
Is preferable, and more preferably 35 to 38% by weight.

The thickness of the polyurethane elastic yarn thus obtained is preferably in the range of 800 to 3730 decitex, more preferably in the range of 940 to 2500 decitex. Further, as the type of the polyurethane polymer, those containing additives such as titanium oxide and iron oxide and having a high surface friction coefficient are more preferable. Content of such additives is 10% by weight
The following is preferable, and 5% by weight or less is more preferable.

The synthetic fiber filament yarn used in the braid of the present invention will be described.

The synthetic fiber filament yarn is polyamide,
Those made of synthetic fibers such as polyester, acrylic, polypropylene and vinyl chloride are preferable, and the embodiment is a raw yarn,
It may be a temporary twisted yarn, a yarn-dyed yarn, or the like, or may be a composite yarn of these.

In particular, from the viewpoint of improving the surface friction resistance, high tenacity yarn, high shrinkage yarn or one-step heater false twisted yarn is preferable. It is preferable that all of these are stable yarns that are easily twisted.

Further, it is preferably thermoplastic, and the heat welding processing temperature is preferably 260 ° C. or lower.

The total fineness of the synthetic fiber filament yarn is preferably in the range of 110 to 470 decitex, and 16
The range of 7 to 280 decitex is more preferable.

The pores of each ball and jewelry are usually about 1 mmφ or less, and in order to improve the work of inserting the coated elastic yarn into the pores, the synthetic fiber filaments are thick enough to obtain rigidity. On the other hand, on the other hand, the fineness of each single yarn of the synthetic fiber filament yarn is in the range of 1.7 to 22 decitex so that it is soft and does not hinder the twisting when covering the elastic yarn. Is preferred,
The range of 11 decitex is more preferable, and the range of 2 to 6 decitex is further preferable.

Further, a twin-ply twist of 55/2 to 235/2 decitex is also preferable, and a twin-ply twist of 84/2 to 200/2 decitex is more preferable.

Further, these dyed yarns may be used.

If the braid is not used in the present invention, there is a problem in that it is not possible to obtain a strap for a mobile phone which is excellent in durability, weather resistance and the like and has a fine surface and is beautiful and rich in color. Next, the braid used in the present invention will be described.

The elongation of the braid used in the present invention is 100%.
It is preferable that it is not less than that, and it is preferable that it is double or more.

The braid is preferably a round braid or a flat braid.

The round braid can be obtained by using a commercially available braiding machine to apply a draft to the elastic yarn as the core component, and braiding the elastic yarn around the braid with the synthetic fiber filament yarn to cover it. it can.

Draft magnification of core component (extended length /
The original length) is preferably extended to 2 times or more, and more preferably in the range of 2.0 to 3.0 times. If the elongation is less than 2.0 times, the unwindability from the elastic yarn package (cake) tends to be insufficient and a sufficient braid tends not to be formed. The lower twist number is preferably in the range of 300 to 1000 T / m, and the twisting direction may be either S twisting or Z twisting. In the case of twin yarn, it is preferable that the number of twists of the upper twist is balanced with the torque of the lower twist, and the number of twists at which the turning force is zero is appropriately set. The ratio of the number of upper twists to the number of lower twists is about 40 to 75. %, A suitable torque balance can be obtained. The upper twist direction is preferably the opposite twist direction to the lower twist direction. The number of bobbins of synthetic fiber filament yarn is 6 to 16
An even number of books is preferred.

The flat braid can be obtained by using a commercially available braiding machine, and flattening the periphery with an elastic yarn as a core yarn and a synthetic fiber filament yarn.

The structure of the flat braid may be any of a basic structure such as a braid structure and a modified structure. As the braided structure, it is particularly preferable to use a braided structure having a one-stroke structure to a three-stroke structure, and the basic structure is one having a one-stroke to two-stroke structure and joining the structures between the braids.

The flat braid preferably has a width of 10 mm or less.

In addition, since the braid has a product structure that meets various tastes of consumers, it is also preferable to arrange many color arrangements as variations.

As means for providing many color arrangements, a method of combining a white dyed yarn with a dyed yarn of another color as a braided yarn, a method of combining dyed yarns of different colors, or a fluorescent dyed yarn In addition, various glass beads, crystals, natural stones, wood beads, colorful plastic beads, etc. may be scattered throughout the present invention.

In the present invention, it is preferable that both ends of the braid are joined by heat welding or fasteners.

A commercially available portable welder (Handy Melting Machine) is used as a method of heat welding.
e) and the like, which is carried out by overlapping both ends of the braid to a temperature near the melting point of the thermoplastic synthetic fiber filament yarn of polyamide, polyester, acrylic, polypropylene, polyethylene, vinyl chloride, etc., and heating and joining for several seconds. Is preferred.

The heat welding temperature is preferably 260 ° C. or lower, more preferably in the range of 140 to 260 ° C. above the softening point.

Further, the thermoplastic synthetic fiber filament yarn is more preferably a core / sheath type composite fiber having a low melting point component as a sheath component, a side-by-side type composite fiber, a polypropylene fiber having a low melting point, a polyethylene fiber or a vinyl chloride fiber.

On the other hand, the method of using the fastener is preferably a method of crushing both ends of the braid with the tip of a tool such as pliers, press-fitting into the fastener, and then further crushing the fastener.

In the present invention, it has a netsuke. The netsuke means a cord connecting the main body of the mobile phone and the strap, and cotton yarn, hemp yarn, polyamide yarn, etc. surface-treated with persimmon astringent are preferably used. Furthermore, in the present invention, pine needle root is preferred.

From the viewpoint of imparting rigidity so that the netsuke can be inserted into the mooring hole of the main body of the mobile phone, the apparent thickness of the netsuke is preferably 1.1 mmφ or less, and 0.95 mmφ or less. Is more preferable.

The total length of the present invention is preferably about 20 cm.

The present invention will be described below with reference to the drawings.

FIG. 1 is a schematic side view showing an example of a braid used in the present invention. In FIG. 1, 2 is a core yarn and 3 and 4 are braid yarns.

FIG. 2 is a schematic view showing an example in which the strap for a mobile phone of the present invention is used.

In FIG. 2, the mobile phone strap 10 of the present invention comprises a flat braid 5, a fastener 6, and a netsuke 7, which is inserted into a mooring hole of the mobile phone 20.

FIG. 3 is a schematic enlarged view showing an example of a state in which the mobile phone strap of the present invention is bound to the mobile phone body.

In FIG. 3, the netsuke 7 is inserted into the mooring hole 21 provided on the opposite side of the antenna 22, and is joined to the braid 5 via the fastener 6.

[0064]

EXAMPLES The present invention will be described below with reference to examples.

[Example 1] Polyurethane elastic yarn (250
0 decitex, type 127 (Toray DuPont Co., Ltd.)
Manufactured by LYCRA (R)) as a core yarn, and two yarns of wooly nylon yarn 122 decitex 34 filaments ply-twisted yarn (manufactured by Toray Industries, Inc., POY-DTY method) are used for eight braided bobbins, A general-purpose string-making machine for low-speed small items,
Braids were prepared with a draft ratio of 2.2 times.

The thickness of the obtained braided braid is 0.95 mm.
Φ, the elongation rate was 130%. Using the obtained braided braid, a strap was produced using fasteners and netsuke as shown in FIG.

With the obtained strap, the mobile phone can be smoothly taken out from the pocket, and the mistakes in incoming call can be reduced.

Further, the inside of the pocket was not bulky, and the surface was dense, beautiful and rich in color.

[Examples 2 to 9] The same wooly nylon yarn as used in Example 1 for the braid (hereinafter abbreviated as NY).
And wooly polyester yarn (167 decitex -48
The same braiding machine as that used in Example 1 using a filament (Toray Co., Ltd., POY-DTY method, abbreviated as PET hereinafter) and using the polyurethane elastic yarn shown in Table 1 as the core yarn. Was used to produce a round braid.

A strap similar to that of Example 1 was manufactured by using the round-laced braid.

[0071]

[Table 1]

The obtained straps were all suitable for mobile phones, had appropriate elongation and rigidity, were excellent in stretchability, had a fine surface, were beautiful, and were rich in color.

The evaluation was performed based on the appearance.

[Example 10] Polyurethane elastic yarn (12
40 decitex, Type 127 (Toray DuPont Co., Ltd., LYCRA (R)) 8 core yarns, Woolly polypropylene yarn (190 decitex-48 filaments (Mitsubishi Rayon Co., Ltd., Mitsubishi Pyrene (R))
The flat braided braid was produced at a draft ratio of 2.8 times using 16 braided yarns produced by the temporary twisting process)).

The flat braid thus obtained had a width of 7 mm and a thickness of 0.
83mm, extension rate 170%, washing shrinkage rate 2.0% (JI
S-L-0217, 103 method).

A strap similar to that of Example 1 was manufactured by using the round-laced braid.

The obtained straps were all suitable for mobile phones, had appropriate elongation and rigidity, were excellent in stretchability, had a fine surface, were beautiful, and were rich in color.

[Comparative Examples 1 to 3] The manufacturing machine and a part of the manufacturing conditions are the same as in Example 1 except that the core yarn is not used, and the braiding yarn is cotton yarn (Comparative Example 2) and 78 decitex 34 filament wooly nylon. Thread (Comparative Example 1), 155 decitex 3
Round braids were produced using 4-filament Woolly nylon yarn (Comparative Example 3) as shown in Table 2.

[0079]

[Table 2]

Using the obtained braided braid, a strap similar to that in Example 1 was manufactured.

The obtained product was hardly stretched, had poor wear properties, and was easily fluffed.

[0082]

According to the present invention, the portable telephone can be smoothly pulled out from the pocket, and the mistake of incoming call can be reduced.

Furthermore, the surface is fine, beautiful and rich in color,
Not too bulky in your pocket.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an example of a braid used in the present invention.

FIG. 2 is a schematic view showing an example in which the mobile phone strap of the present invention is used.

FIG. 3 is a schematic enlarged view showing an example of a state in which the mobile phone strap of the present invention is bound to the mobile phone body.

[Explanation of symbols]

1: Round braid 2: Core thread (elastic thread) 3: Braided yarn (synthetic fiber filament yarn) 4: Braided yarn (synthetic fiber filament yarn) 5: Braid 6: Fastener 7: Netsuke 10: Strap for mobile phone 20: Mobile phone 21: Mooring hole 22: Antenna

Claims (9)

[Claims] 1. A strap for a mobile phone, characterized in that the core yarn is composed of an elastic yarn and the braiding yarn is a synthetic fiber filament yarn and a braid. 2. The strap for a mobile phone according to claim 1, wherein both ends of the braid are joined by heat welding or fasteners. 3. The strap for a mobile phone according to claim 1, wherein the expansion rate of the braid is 100% or more. 4. The strap for a mobile phone according to any one of claims 1 to 3, wherein the braid is a round braid. 5. The strap for a mobile phone according to claim 1, wherein the braid is a flat braid. 6. The strap for a mobile phone according to claim 5, wherein the flat braid has a width of 10 mm or less. 7. The strap for a mobile phone according to claim 1, wherein the synthetic fiber filament yarn is thermoplastic. 8. The thermal fusion temperature of the synthetic fiber filament yarn is 2
The strap for a mobile phone according to claim 7, wherein the temperature is 60 ° C or lower. 9. The strap for a mobile phone according to claim 1, wherein the apparent thickness of rooting is 1.1 mmφ or less.