JP2547692B2 - Hair dryer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dryer capable of irradiating far infrared rays.

[0002]

2. Description of the Related Art A hair dryer of this type has been proposed, for example, in Japanese Utility Model Laid-Open No. 62-143406. As shown in FIGS. 5 (a) and 5 (b), this is a far-infrared radiation ceramic that constitutes a lattice-shaped outlet grille 20, and this outlet grille 20 is used as a warm air outlet 2 of the main body case 1. By arranging it, the hair can be dried quickly by irradiating the hair with far infrared rays by warm air, and the blood circulation of the scalp can be promoted. Further, as disclosed in Japanese Utility Model Laid-Open No. 62-109004,
For the same purpose, a far-infrared radiation plate is arranged at the hot air outlet. This far-infrared radiation plate forms a grid-shaped base material 22 as shown in a part of FIG. The far-infrared radiation substance film 23 is applied and formed by a dipping method or a thermal spraying method.

[0003]

However, as in the former example of the former case, the ceramics for emitting far-infrared radiation, the above-mentioned blow-out grill 20 composed of only this ceramic is very expensive in view of the raw material used. In addition, it is very vulnerable to drop impacts and easily damaged, so it is necessary to pay close attention when handling it when assembling it. Further, when it is formed into a lattice shape and sintered, a part thereof is easily lost or easily deformed, resulting in poor yield. On the other hand, according to the latter conventional example in which the grid-shaped base material 22 is formed and the far-infrared radiation substance is applied to the base material 22, the drop impact can be achieved by selecting the material of the base material 22. It is advantageous that a strong one can be obtained. However, in this latter one, when the far-infrared radiation substance is applied to the base material 22 and dried, the far-infrared radiation substance solution is applied to the corner C of the ventilation hole 24 of the lattice rib 21 by the surface tension as shown in FIG. A membrane is created and spreads in a round shape, or the ventilation holes 2 of the lattice rib 21
4, a liquid dripping 25 is generated on a part of the downward side surface 21a, and the side surface 21a facing the ventilation hole 24 is unnecessarily thick. May be overpainted. Such an inconvenient phenomenon tends to occur remarkably when a solution of a far-infrared emitting substance having a high viscosity is used. In this way, when the rounded film spreading and the liquid dripping 25 occur at the corner C, or when the unnecessary surface is excessively thickly applied unnecessarily, the opening width of the ventilation hole 24 is narrowed, so that the ventilation resistance becomes large, Sufficient warm air is not blown out, and a hot-smell phenomenon occurs in the main body case 1. Further, since the opening width of the ventilation hole 24 varies, the problem of non-uniform irradiation of the far-infrared radiation substance occurs.

The object of the present invention is to devise the cross-sectional shape of the grid rib of the base material in the hair dryer having the far-infrared radiation plate in which the surface of the grid-shaped base material is coated with the far-infrared radiation material as described above. This is to prevent excessive coating liquid pooling and liquid dripping in the ventilation holes and to make the width of the ventilation holes constant.

[0005]

In the hair dryer of the present invention, as shown in the figure, the far infrared radiation plate 6 disposed on the air outlet 2 side of the main body case 1 is provided with a large number of ventilation holes 7 and respective ventilation holes. The far-infrared radiation material film 10 is applied to the surface of the base material 9 having the lattice ribs 8 surrounding the holes 7. The back surface 13 of the base material 9 faces the inner side of the air outlet of the lattice ribs 8. An edge 15 for cutting the coating liquid is formed at the ridge angle where the side surface 12 facing the ventilation hole 7 meets.

[0006]

Function: Edge 15 for removing the coating liquid provided on the base material 9
When the solution or dispersion of the far-infrared radiation substance is applied to the surface of the base material 9 by the dipping method or the spraying method, the solution or the dispersion may flow from the back surface 13 of the lattice rib 8 to the side surface 12. It acts to cut. Due to the action of removing the coating liquid by the edge 15, it is possible to minimize the excessive accumulation of the coating liquid in the corner of the ventilation hole 7 as shown in FIG. Further, the occurrence of dripping can be reduced. Further, it is possible to prevent the side surface 12 from being unnecessarily thickly applied.

[0007]

1 to 4, reference numeral 1 is a main body case of a hair dryer, 2 is an air outlet provided at a front end of the main body case 3, 3 is a suction port provided at a rear end of the main body case 1, and 4 is a main body case. A heater 5 accommodated inside 1 is a blower fan disposed behind the heater 4 inside the main body case 1. A far-infrared radiation plate 6 which also serves as an outlet grill is arranged at the outlet 2 of the main body case 1. The far-infrared radiation plate 6 has a far-infrared radiation substance film 10 formed by coating a far-infrared radiation substance on a grid-shaped base material 9.

Specifically, the far infrared radiation plate 6 is manufactured as follows. First, by pressing a metal plate, a base material 9 having a large number of ventilation holes 7 and a large number of grid ribs 8 and having a dome shape as a whole is obtained as shown in FIG. An edge 15 is formed at the ridge angle where the back surface 13 of the lattice rib 8 of the base material 9 and the side surface 12 facing the ventilation hole 7 meet.
To form. The edge 15 is so-called "burr" when the base material 9 is pressed (sheared) with a metal plate.
Can be easily obtained by specifying the pressing direction so that is located on the back surface side. Next, the base material 9
Is subjected to a degreasing treatment, then first dipped in a solution or dispersion of a far-infrared emitting substance and naturally dried. After secondary dipping and natural drying, forced drying is performed at a predetermined temperature.

An example of the components of the solution or dispersion of the far-infrared emitting substance is a mixture of the far-infrared emitting substance powder, an organic binder of 67% and a solvent of 33%. As the powder of the far-infrared radiation substance, for example, a ceramic such as zirconia or alumina silicon carbide is used, and the particle size is 10 to 50 μm. As the organic binder, a urethane binder is preferable.

In the above-mentioned dip coating, for example, the convex surface 9a (see FIG. 4) of the dome-shaped base material 9 is directed downward, and the concave rear surface 9b (see FIG. 4) is directed upward. When the solution or dispersion liquid of the far-infrared radiation substance is dipped in the solution or dispersion liquid of the far-infrared radiation substance and is gently pulled up from the solution or dispersion liquid after the dipping, the edge 15 of the lattice rib 8 becomes Back side 13
The coating liquid cutting action of cutting the flow from the side to the side surface 12 is exhibited. As a result, it is possible to prevent the coating film from accumulating in the corners of the ventilation holes 7 and to prevent it from spreading in an envelope-like rounded shape or from dripping, and also to prevent the side surface 12 from being unnecessarily thickly coated. Therefore, the opening width of the ventilation hole 7 is less likely to be narrowed, and the variation in the opening width can be reduced.

Far-infrared radiation material film 1 on the surface of the grid rib 8
0 is formed on the convex curved surface 11 that is convex toward the outside of the air outlet to increase the surface area. Therefore, the warm air from the heater 4 smoothly flows along the convex curved surface 11, and a large amount of far infrared rays are radiated toward the outside of the air outlet 2 by an amount corresponding to the expansion of the surface area by the convex curved surface 11. The side surface 12 of the lattice rib 8 facing the ventilation hole 7 and the back surface 13 of the lattice rib 8 facing the inside of the air outlet are places that have a low contribution to improving the irradiation efficiency.
Is formed thinner than the film thickness on the convex curved surface 11 to secure the opening size of the ventilation hole 7 as large as possible and enable economical coating.

The base material 9 may be made of a metal such as iron or aluminum, or a synthetic resin (particularly a synthetic resin such as polycarbonate having excellent heat resistance), but a material having a large specific heat such as iron is preferable. This is because when the base material 9 is made of a material having a large specific heat, the far-infrared radiation substance film 10 is uniformly heated from the inside of the cross section to the outside, and the irradiation efficiency can be further enhanced. On the other hand, when the base material 9 is made of resin, the far-infrared radiation material film 10 is heated only by the hot air flowing on this surface, and the temperature at the center point A on the leeward side is low as shown in FIG. And the irradiation efficiency becomes poor. Also, base material 9 made of resin
Has a low amount of heat and low thermal conductivity, is affected by the temperature distribution of the warm air as it is, and is likely to cause variations in the amount of irradiation at the central portion of the far-infrared radiation plate 6 and in the vicinity of the outer periphery.
When the base material 9 is made of a metal plate, the metal plate may be plated with neutralized or unneutralized plating or nickel plating.

The far-infrared radiation plate 6 is formed in a dome shape having a convex arc shape toward the outside of the air outlet even in the whole cross-sectional shape, and the film thickness T of the far-infrared radiation material film 10 at the center of the plate surface.
The thickness t of the peripheral mounting portion 14 is formed thinner than that. In such a case, the far-infrared radiation plate 6 is bent when the far-infrared radiation plate 6 is press-fitted into the groove 16 on the inner wall of the outlet 2 of the main body case 1 as shown in FIG. When the film thickness t is large, it is difficult to bend and it is difficult to securely fit and fix. Further, when the thickness t of the peripheral edge mounting portion 14 is large, the far-infrared irradiation of the portion in contact with the inner wall of the main body case 1 is performed on the main body case 1, and the temperature of the relevant portion of the main body case 1 is increased more than necessary. Although there is a problem in that it is easily raised to cause thermal deformation, such a problem can be solved by reducing the film thickness t of the peripheral edge mounting portion 14.

In the present invention, the far infrared radiation plate 6 is
In addition to the one that doubles as the outlet grille as in the above embodiment,
The far-infrared radiation plate may be independently formed as a separate body from the air outlet grill and used in parallel with the air outlet grill. Further, the far-infrared radiation plate 6 may be formed in a quadrangle instead of being formed in a circle when viewed from the front as shown in FIG. Further, the far-infrared radiation plate 6 is arranged inside the blow-out nozzle N when the blow-out nozzle N as shown in FIG. It may be installed.

[0015]

According to the present invention, since the back surface 13 of the grid rib 8 of the base material 9 and the side surface 12 facing the ventilation hole 7 meet each other, the edge 15 for cutting the coating liquid is formed. When the far-infrared radiation substance is applied to the base material 9, the edge 15 makes it possible to make the coating liquid run out well, and it is possible to reduce the occurrence of excessive coating liquid pooling or liquid dripping in the ventilation hole 7 and It is possible to prevent the narrow opening width and increase in ventilation resistance.
It is possible to ensure a sufficient blowing of warm air and prevent the occurrence of a hot muffled phenomenon in the main body case 1. Ventilation hole 7
The variation of the aperture width can be made as small as possible and can be made almost constant, and the irradiation of far infrared rays can be made uniform over the entire surface.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a far infrared radiation plate of a hair dryer.

FIG. 2 is a front view of a far infrared radiation plate of a hair dryer.

FIG. 3 is a side view showing a hair dryer with a blowout port portion cut away.

FIG. 4 is a cross-sectional view of a base material of a far infrared radiation plate of a hair dryer.

FIG. 5 shows a conventional hair dryer, and FIG.
FIG. 5A is a front view, and FIG. 5B is a sectional view of a part of the outlet grill.

FIG. 6 is a cross-sectional view of a far-infrared radiation plate showing a defective application state of a far-infrared radiation material.

[Explanation of symbols]

 1 Main body case 2 Air outlet 6 Far-infrared radiation plate 7 Ventilation hole 8 Lattice rib 9 Base material 10 Far-infrared radiation material film 15 Edge

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-113078 (JP, A) Actually opened 62-143408 (JP, U) Actually opened 63-64304 (JP, U) Actually opened 63- 166104 (JP, U) Actual opening 63-166105 (JP, U) Actual opening 61-157401 (JP, U) Actual opening 62-23605 (JP, U) Actual opening 62-109004 (JP, U) Actual opening Sho 62-175705 (JP, U) Actual opening Sho 63-177401 (JP, U) Actual opening Sho 62-143406 (JP, U) Actual opening Flat 1-112859 (JP, U)

Claims (1)

(57) [Claims] 1. A far-infrared radiation substance is applied to the surface of a base material 9 having a large number of ventilation holes 7 and lattice ribs 8 surrounding each ventilation hole 7 on the outlet 2 side of a main body case 1. In the hair dryer in which the far-infrared radiation plate 6 is arranged, the back surface 13 of the lattice rib 8 facing inward of the air outlet and the ventilation hole 7 are provided.
A hair drier, characterized in that an edge 15 for cutting off the coating liquid is provided at a ridge angle where the side surface 12 facing the side meets.