JPS6034405A - Hair dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure of a heater for a hair dryer that switches the capacity using electrical components such as a rectifier and a resistor.

Since then, this type of dryer has had a structure in which electrical parts such as the rectifier are installed near the capacity selection switch, but the area near the switch is often covered with plastic parts, and it is difficult to handle large capacity hair dryers. Since the current flowing through a dryer is large, the rectifier itself generates a large amount of heat, and the surface temperature can exceed 100 degrees Celsius. According to the above structure, since there is a risk that the surrounding price deck parts may be thermally deformed due to the F1 of the rectifier, it is preferable that the rectifier is provided in the heater board.
For example, Utility Model Application Publication No. 50-107390 and Utility Model Application No. 5 (L
It has already been proposed as in Japanese Patent No. -98970.

However, in all of these, the rectifier, etc. is installed parallel to the surface of the heater board ((J), so the rectifier, etc. is installed parallel to the surface of the heater board (J). = The flow path of the section that is being renovated is
Since the temperature rises higher than in other flow paths, this temperature gradient causes the heat generation of the heater wire to become unbalanced, resulting in local overheating on the blade side more than necessary, which shortens the life of the heater wire.

In addition, since a temperature gradient occurs due to the flow path, it is not possible to place a thermostat for preventing excessive temperature rise in an appropriate location, and it is necessary to set the temperature lower or higher in advance in consideration of the above-mentioned cage density gradient. There is a lot of complexity.

Moreover, when using a large capacity, the rectifier etc. will be removed from the heater power supply circuit and no heat will be generated, but the above thermostat that takes temperature gradients into account will detect when this temperature gradient has disappeared. This may lead to malfunction.

This temperature gradient becomes even more noticeable because the cross-sectional area of the air flow path in the compartment where the rectifier etc. is installed is obstructed by the rectifier etc. and is reduced. Since the jitter noise becomes louder locally, it becomes a harsh noise during use.

This invention has been made with these points in mind. A pair of heater boards are crossed in a criss-cross pattern so that the air flow path inside the main body case is divided into four quadrants. A through hole or notch is provided at the intersection of the two, and the electric component for capacity switching is positioned so that it equally faces each quadrant, and the capacity of the rectifier, etc. given to each quadrant of the air flow path divided by the heater board is adjusted. This allows flexibility in the arrangement of the electrical parts for switching, makes wind noise almost even in each quadrant, prevents it from becoming noisy, and further prevents local overheating of the heater wire.

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is an overall structural diagram of a hair dryer 4-- according to an embodiment, and a heater 2 and a motor 3 are provided inside the main body case 1.

A fan 4 is press-fitted into the motor 3, and when the switch is turned on, the fan 4 rotates, sucks in cold air through an inlet 31, heats the cold air with the heater 2, and blows out hot air through an outlet 32. Inside the handle case 5,
A power cord 8 is installed via a power switch 7 and a bush 6, which also serves as a capacity switch. FIG. 2 is a circuit diagram of this embodiment. Note that the switch 7 is a two-circuit type switch, and is composed of SWI and SW2. The terminal voltage of motor 3 is between heater wire Al01 and heater wire 1.
It is set to be lower than the power supply voltage due to voltage division with 311.

There are two types of capacity switching: weak and strong.
Since only I is closed and the current is half-wave rectified by the rectifier,
The voltage applied to the heater wire is reduced to 70% of the supply voltage. Further, when the power is set to high, SW2 closes and the voltage applied to the heater wire can be made equal to the power supply voltage. The structure of the heater is as shown in FIG. Substrate A] 3, and group Jfi
+314 crosses each other in a cross shape and has a cross stopper ¥1.1
It is fixed by 5. Each board has a heater wire AIO
, a heater wire B11, and a thermostat 9 for preventing temperature overrangement are caulked to the substrate 2 by eyelets 16.

Heater board AI3. By assembling the B14 in a criss-cross pattern as shown in Fig. 3 and storing it in the main body case 1, the air flow path is divided into four quadrants S as shown in Fig. 4.
l, S2. It is divided into S3° and S4.

Two rectifiers 12 are connected in parallel to increase current capacity.
A leait wire 33 is caulked and connected to both terminals by a connecting fitting 17. As shown in FIG. 4, the board B14 has a through hole 1319 of approximately the same size as the rectifier 12 and a through hole A18 for the connection fitting 17 at a position intersecting with the board AI3. The rectifier I2 is fitted into the hole B11, and the rectifier I2 is positioned in the horizontal direction to restrict movement with respect to the plane direction of the heater board.

Further, the board A13 is provided with a notch 20 at a position intersecting with the board 4, which restricts the vertical movement of the rectifier I2 and prevents it from coming off.

According to the above embodiment, the rectifier 12 and the wire 33 are crimped in advance with the connecting fitting 17, and the fixing force method of the rectifier 12 is performed when assembling the heater in the through hole B I 9 of the substrate B 14. After inserting the rectifier 12 into the board A13
The rectifier 12 can be easily fixed by sliding the rectifier 12 laterally onto the board B i 4 and crossing it in a cross shape in a few cases. Therefore, according to the above embodiment, the rectifier 12 is Quadrant S1. S2. S3. Since the rectifier 12 is positioned so as to equally face both of the heater wires AIO,
In addition to eliminating the heat generation imbalance of Bil, there is no temperature gradient between each quadrant, so there is a degree of freedom in designing the placement of the thermostat for preventing excessive temperature rise, and even if the rectifier 12 does not generate heat when using a large capacity, the thermostat can be adjusted. No malfunctions.

Moreover, since the rectifier 12 does not cool only a specific quadrant, noise caused by concentration of wind noise can be reduced, and the user will not feel uncomfortable during use.

Note that the same effect can be expected when a resistor is inserted into the notch instead of the rectifier 12.

As described above, according to the present invention, it is possible to provide a hair dryer that has a simple structure, has a long life, and is comfortable to use.

[Brief explanation of drawings]

FIG. 1 is an overall structural diagram of a hair dryer according to an embodiment, FIG. 2 is a circuit diagram, FIG. 3 is a detailed diagram of a heater according to an embodiment, and FIG. 4 is a cross-sectional view taken along line A-A. 1... Main body case, 2... Heater, 12... Rectifier, 13.■4... Board A, B, Sl, S2. S3
．． S4...Quadrant. Applicant Kyushu Hitachi Maxell Co., Ltd. Representative Takashi Fukuhara I Figure 2 Figure 3 Figure Hayato

Claims (1)

[Claims] A pair of heater boards are assembled in a cross shape to divide the air flow path inside the main case into four quadrants, and a through hole or cutout is provided at the intersection of the boards to switch the capacity. A hair dryer characterized in that electric parts for use in each quadrant are positioned so as to equally face each quadrant.