JPH0522524B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a heat generating device for a hair dryer.
This invention relates to providing a component mounting board in a heat generating device and arranging components to be mounted on the board.

[Background of the invention]

In the future, heat generating devices for hair dryers will be required to have an inexpensive structure and stable quality, so a component mounting board will be installed inside the heat generating device, the necessary components will be placed on this, and one side will be used as an air blower, and the other side will be used as a heater wire. It is thought that most of the components are electrically connected.
At this time, the installation positions of the voltage drop resistor, thermostat, and temperature fuse, which are always installed, are considered to play an important role in safety.
In particular, hair dryers are equipped with temperature fuses and thermostats in case of abnormal handling, and if these are not installed properly, the main body case may deform or burn, and in extreme cases, it may cause a disaster. . There are two types of abnormalities: hot air operation and cold air operation. When the air is hot, the thermostat is activated by the heat generated by the heater wire, and when the air is cold, the temperature fuse is activated due to the heat generated by the voltage drop resistor. .

[Summary of the invention]

The present invention has a heat generating device formed by winding heater wires along the outer periphery of a board combined with an air blower and a cross in a main body case, and a component mounting board is disposed within the heat generating device. A voltage drop resistor and a thermostat are placed apart from each other on both sides of the component mounting board, and a temperature fuse is located between the voltage drop resistor and the thermostat. is attached at a predetermined angle to the cross-shaped substrate of the heat generating device, so that each component of the voltage drop resistor, thermostat, and temperature fuse can be placed in one of the four quadrants defined by the cross-shaped substrate. Each is located in a different quadrant, with sufficient consideration given to safety.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 1, 2, 3, 4, 5, and 6. 1 is a main body case rotatably connected to a handle 36; A blower device 2, a heat generating device 5, and a heater cover 26 surrounding the heat generating device 5 are provided inside, and a circumferential space 27 is formed between the outer periphery of the heater cover 26 and the inner surface of the main body case 1. In addition, a nozzle 28 slides and rotates in the circumferential space 27 at the front part of the main body case 1.
(only when in front of) is attached so that it can be freely moved. The nozzle 28 is composed of two members: a nozzle base material 29 molded inside of a resin such as nylon or polycarbonate, and a nozzle cover 31 molded from rubber or the like that covers the surface of the nozzle base material 29. The nozzle base material 29 is provided with a U-shaped opening 30 facing the ground, and the nozzle cover 31 is provided with an operating protrusion 32 on its front side. Nozzle cover 3
Silicone rubber with a rubber hardness of 40 to 50 is used as the material for 1, and the average thickness of the part excluding the operating protrusion 32 is 0.5 to 50.
It is set as 1.0mm.

Furthermore, a U-shaped notch 33 is provided on the front side of the main body case 1, and the operation protrusion 32 is configured to slide along this U-shaped notch 32.

The blower device 2 is composed of a rectifying blade 42, a motor 3, and a fan 43. The motor 3 to which the fan 43 is fixed is attached to the center part of the rectifying blade 42, and the outer peripheral part is fitted and fixed to the inner peripheral surface of the main body case 1. It is becoming more and more like this. Further, a conductive terminal is provided on the rear end surface of the motor 3.

The heat generating device 5 is located in front of the blower device 2, and is formed by fully assembling two mica substrates 6 and 7 and winding a heater wire 10 along the outer periphery of the substrates 6 and 7. The end windows 8 and 9 of the mica substrates 6 and 7 are equipped with temperature overrise prevention devices (thermostat 14 and temperature fuse 15), noise prevention electronic components (film capacitor 18 and chiyoke coil 19), and rectifier electronic components (silicon rectifier 17). and a printed circuit board 11 on which a silicon diode 16) is mounted, or a similar product using a mica board as a substitute for the printed board and a shorting wire and a shorting plate instead of a copper foil pattern, parallel to the direction of air blowing and shaped like a cross when viewed from the front. The mica substrates 6 and 7 are attached so as to obtain a certain angle θ. Further, there is a copper foil pattern 13 on the surface of the printed circuit board 11, and a thin groove 12 provided at one end of the printed circuit board 11 has a conductive terminal 4 at the rear end of the motor 3, and a thermostat connected to the other end. The fourteen fixing pieces 44 are respectively fitted and fixed to be electrically connected to crimp terminals 45 which are wound around the outer peripheries of the mica substrates 6 and 7 and which fix one end of the heater wire 10.

The components are mounted on the printed circuit board 11 in such a way that the noise prevention and rectification electronic components are located closer to the motor 3 side, the overtemperature rise prevention device and voltage drop resistor 20 are located closer to the opposite side, and the voltage drop resistor 20 and The thermostat 14 is placed near the side end surface of the printed circuit board 11 (at a position close to the heater wire 10), and the temperature fuse 15 is placed between the voltage drop resistor 20 and the thermostat 14. Further, a thread fuse 24 is used as the temperature fuse 15, and one end is melted and fixed to the lead wire portion of the silicon diode 16.

Therefore, as shown in FIG. 4, the voltage drop resistor 20, thermostat 14, and temperature fuse 15 are placed in different quadrants among the four quadrants partitioned by the cross-shaped substrates 6 and 7. It is now located in

The voltage drop resistor 20 is made by winding a nichrome wire 24 on the surface of a mica plate 21, and connecting the ends of the nichrome wire 24 to the notches 2 provided in the printed circuit board 11.
Annealed copper wires 25 and 25' (not shown) are wound around wires 2, 23, 22', and 23' (not shown), and their surfaces are joined with solder. The voltage drop resistor 20 is attached to the printed circuit board 11 by using mica plates 21 and 21' that are equal to the thickness of the step on one end of the printed circuit board 11 (including the copper foil pattern 13).
(not shown) by press-fitting into the notch 22,
Electrical connection is made by contact between the mild steel wire 25 and the copper foil pattern 13.

Numeral 35 is a fixed handle forming an inverted U-shape with the surface of the main case 1, and is integrally molded with the main case 1.

Reference numeral 36 denotes a handle portion with a concave portion 37 formed in the lower end surface, and a cord 42 with a power plug 43 attached thereto. A switch button 39 engraved with 40 is attached so as to be slidable. The stepped portion 38 is approximately 2/3 of the width of the circular portion,
Display characters 41 such as silk printing are written on the remaining portion.

The handle 36 is rotatably connected to the main case 1, and when the handle 36 is folded toward the main case 1, the cord can be wound between the fixing plate 35 and the recess 37.

〔Effect of the invention〕

As explained above, the present invention includes a blower device and a heat generating device formed by winding heater wires along the outer periphery of a board combined in a cross shape in the main body case, and a component mounting board is mounted inside the heat generating device. In the arrangement, the voltage drop resistor and thermostat are placed apart from each other on both sides of the component mounting board, and the temperature fuse is located between the voltage drop resistor and the thermostat. By attaching this component mounting board to the cross-shaped board of the heat generating device at a predetermined angle, each component of the voltage drop resistor, thermostat, and temperature fuse is partitioned by the cross-shaped board. Since each of the two quadrants is located in a different quadrant, it prevents accidents caused by abnormal handling of the hair dryer.
In particular, the component mounting board is attached at a predetermined angle to the cross-shaped board of the heat generating device, so the thermostat placed near one side of the component mounting board is attached to the side that connects the cross-shaped board. The thermostat is arranged sufficiently close to the heater wire 10, so that the thermostat operates more sensitively due to the heat generated by the heater wire during hot air. Furthermore, the temperature fuse disposed adjacent to the voltage drop resistor is sensitive to the heat generated by the voltage drop resistor during cold air.

Furthermore, the components mounted on the component mounting board are arranged in the order of thermostat, temperature fuse, and voltage drop resistor from one side to the other, as described above. By attaching the mica substrates 6 and 7 at a certain angle θ, they are distributed in each quadrant formed by the cross-shaped substrates, so that the wind flow is partially controlled. In addition, the air is not concentrated and obstructed, and the air blowing condition does not change.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of the main body case, FIG. 3 is a left side view of FIG. 1, and FIG. Part A explanatory diagram,
FIG. 5 is an external front view of the present invention, and FIG. 6 is a diagram showing how the voltage drop resistor is installed. 1... Body case, 2... Air blower, 5... Heat generating device, 6, 7... Mica board, 10... Heater wire, 11... Parts mounting board, 14... Thermostat, 15... Temperature Fuse, 20... Resistor for voltage drop.

Claims (1)

[Claims] 1 A heat generating device formed by winding heater wires along the outer periphery of a blower and a board combined in a cross shape inside the main body case, and a component mounting board placed inside the heat generating device. A voltage drop resistor and a thermostat are placed apart from each other on both sides of the board, and a temperature fuse is located between the voltage drop resistor and the thermostat, so that this component mounting board is connected to the above heat generating area. By mounting at a predetermined angle to the cross-shaped board of the device, each component of the voltage drop resistor, thermostat, and temperature fuse can be placed in a different quadrant among the four quadrants defined by the cross-shaped board. A hair dryer characterized by being positioned in a quadrant.