JPH0238642Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The invention relates to a heat generating device for a hair dryer.
This heat generating device has a board for mounting components, and relates to the mounting position of a voltage drop resistor made by winding a resistance wire such as a nichrome wire around an insulating plate such as a mica plate.

[Background of the idea and problems]

This type of hair dryer uses a voltage drop resistor to limit the power supplied to the motor. Since this device generates heat, the conventional mounting structure was to directly attach it to the heater board, as shown in, for example, Japanese Utility Model Publication No. 52-39562.

For this reason, if a defect is found on the heater board during assembly or repair, even the one with the resistor attached will be replaced or discarded. Conversely, when replacing the resistor, the heater wire that has already been wrapped around the heater board will be replaced. It was troublesome and wasteful, as work could not be done without unraveling the parts.

This idea is based on the idea that the hair dryer's heat generating device has an inexpensive structure and stable quality, and a component mounting board such as a printed circuit board is installed inside the heat generating device, and the necessary components are mounted on this. proposes a device that can be electrically connected to the heater wire, and specifies the type, mounting position, and direction of the voltage drop resistor to be mounted on the substrate when it is formed into a board. The voltage drop resistor is a type of heating element and is preferably placed in a place exposed to constant wind, and is preferably small because it is required to minimize wind resistance in order to increase air volume as a hair dryer.

[Means for solving problems]

The present invention has been developed with this point fully taken into consideration, and has a blower device and a heat generating device inside the main body case, and the heat generating device has a cross-shaped board for the heat generating device and a board for mounting components. In preparation, a component mounting board is provided protruding from the intersection of the above-mentioned heating device board, and at the tip of this component mounting board, a voltage drop is provided by winding a resistance wire around an insulating plate that intersects with this component mounting board. The component mounting board is separate from the heating device board which is combined in a cross shape. Since it is assembled so that it protrudes at the intersection of the heat generating circuit board, there is no need for special parts for mounting the component mounting board, and it can be firmly fixed. The intersection point is originally a place where the amount of air blowing is small, so it does not create resistance to air blowing, and the board surface is parallel to this heat generating device board, so
The flow of air can be made smooth, and since the voltage drop resistor is separated from the heating device board surface, almost the entire surface of the voltage drop resistor can be exposed to the inside of the air duct. It is possible to efficiently cool down the air, reduce the difference in resistance caused by a difference in temperature, stabilize the rotation of the motor, and keep the air volume constant.

Moreover, the two types of heating wires (heater wire and resistance wire) normally provided in this type of dryer are each attached to a separate board, and are separated from each other by a separate component mounting board. Even if one of the heating wires, which often causes accidents such as disconnection, breaks down or is damaged, it can be easily maintained and replaced regardless of the other heating wire or board, and the other one is not wasted, making it economical. be able to.

[Example of idea]

Hereinafter, one embodiment of the present invention will be explained with reference to Figures 1, 2, 3, 4, 5, 6, and 7. 1 is a main body case that can be rotated with 36 handles. The air blower 2 and the heat generating device 5 are connected to each other, and a heater cover 26 surrounding the heat generating device 5 is provided inside, and an inner peripheral space 27 is formed between the outer periphery of the heater cover 26 and the inner surface of the main body case 1. Further, a nozzle 28 is attached to the front part of the main body case 1 so as to be able to slide and rotate freely in the circumferential space 27 (only when the nozzle 28 is in front of the front end face 34 of the main body case 1). There is. The nozzle 28 is composed of two members: a nozzle base material 29 made of resin such as nylon or polycarbonate on the inside, and a nozzle cover 31 made of rubber or the like that covers the surface of the nozzle base material 29. The nozzle base material 29 is provided with opposing U-shaped openings 30, and the nozzle cover 31 is provided with an operating protrusion 32 on its front side. The material of the nozzle cover 31 has a rubber hardness of 40~
No. 50 silicone rubber is used, and the average thickness of the portion excluding the operating protrusion 32 is set to 0.5 to 1.0 mm.

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

The blower device 2 consists 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 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. Furthermore, 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 includes two mica heater substrates 6 and 7 as heat generating device substrates.
In the space surrounded by the end windows 8 and 9 of the heater boards 6 and 7, an over-temperature rise prevention device (thermostat 14 and temperature fuse 15),
A printed circuit board on which noise prevention electronic components (film capacitor 18 and chiyoke coil 19) and rectifying electronic components (silicon rectifier 17 and silicon diode 16) are mounted, or a mica board is used as a substitute for the printed circuit board, and short-circuit wires and short circuits are used instead of the copper foil pattern. A heater board 6 in which a component mounting board 11 made of a board or the like is combined parallel to the air blowing direction and in a cross shape when viewed from the front.
It is attached so as to protrude from the intersection point so that a certain angle θ of 7 is obtained. In addition, there is a copper foil pattern 13 on the surface of the component mounting board 11, and the conductive terminal 4 at the rear end of the motor 3 is connected to the thin groove 12 provided at one end of the component mounting board 11, and the other end thereof. The fixing pieces 44 of the thermostat 14 are fitted and fixed to the crimp terminals 45 fixing one ends of the heater wires 10 wound around the outer peripheries of the heater boards 6 and 7, respectively, and are electrically connected. ing.

The components are mounted on the component mounting board 11 in such a way that the noise prevention and rectification electronic components are located near the motor 3, and the overtemperature rise prevention device and voltage drop resistor 20 are located on the opposite side. body 20
and the thermostat 14 are placed opposite to each other near the tip of the component mounting 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 is used as the temperature fuse 15, and one end is melted and fixed to the lead wire portion of the silicon diode 16.

The voltage drop resistor 20 is made by winding a resistance wire 24 such as a nichrome wire around the surface of an insulating plate 21 such as a mica plate, and connecting the ends of the resistance wire 24 to the insulating plate 21.
It is wound together with an annealed copper wire 25 around the notches 22 and 23 provided in it, and its surfaces are joined with solder. Board 1 for mounting components of voltage drop resistor 20
1 by press-fitting the thickness of the step on one side of the component mounting board 11 (including the copper foil pattern 13) into the notch 22 of the insulating board 21, and the electrical connection is made using annealed copper. This is done by contacting the wire 25 with the copper foil pattern 13. In this case, the component mounting board 11 is arranged so that its plate surface is along the direction of air blowing by the air blower 2, and the voltage drop resistor 20 is arranged so that its plate surface is along the direction of the air blowing. It is attached to the mounting board 11, and therefore,
The voltage drop resistor 20 is spaced apart from the heater boards 6 and 7 of the heat generating device 5 via the component mounting board 11, and in this way, the voltage drop resistor 20 is oriented in a direction that does not create wind resistance, and in a direction that does not create a cooling effect. It will be positioned within a high air duct.

In addition, the heater boards 6 and 7 and the voltage drop resistor 20
are positioned and assembled via the component mounting board 11, so if one of them breaks down,
In the event of damage, only the failed part needs to be replaced or repaired, making maintenance and replacement easier, as well as easier management of each part, resulting in lower prices.

35 is a fixing plate forming an inverted U-shape with the surface of the main body case 1, and is integrally molded with the main body 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 front portion, and display characters 41 are written on the remaining portion by silk printing or the like.

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 idea]

As described above, according to the present invention, the main body case includes a blower device and a heat generating device, the heat generating device includes a heat generating device board and a component mounting board combined in a cross shape, and the component mounting board is the above-mentioned component mounting board. A voltage drop resistor, which protrudes from the intersection of the heat generating device board and is made of a resistance wire wrapped around an insulating plate, is attached to the tip of the component mounting board, and intersects with the component mounting board. Since the plate surface of the resistor is attached along the direction of the air flow, almost the entire surface of the voltage drop resistor is exposed to the air flow path without interfering with the flow of air, allowing efficient cooling from the entire surface. This makes it possible to reduce the difference in resistance value caused by a difference in temperature, stabilize the rotation of the motor, and keep the air volume constant.

Moreover, according to the present invention, the two types of heating wires (heater wire and resistance wire) normally provided in this type of dryer are each attached to a separate board, and are separated from each other by a separate component mounting board. Therefore, even if one of the heating wires breaks down or breaks, which often causes accidents such as disconnection, it can be easily maintained and replaced regardless of the other heating wire or board, and it is economical without wasting the other heating wire. It is.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing one embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of the main body case, Fig. 3 is a left side view of Fig. 1, and Fig. 4 is a line A--A in Fig. 2. Part A explanatory diagram,
FIG. 5 is a front view of the exterior appearance of the present invention, FIG. 6 is a diagram showing the state in which the voltage drop resistor is attached, and FIG. 7 is a perspective view of the board assembled state. DESCRIPTION OF SYMBOLS 1... Main body case, 2... Air blower, 5... Heat generating device, 11... Part mounting board, 20... Voltage drop resistor, 21... Insulating plate, 24... Resistance wire.

Claims (1)

[Scope of utility model registration request] The main body case has an air blower and a heat generating device, and the heat generating device includes a heat generating device board and a component mounting board that are combined in a cross shape, and the component mounting board is inserted from the intersection of the heat generating device boards. At the tip of this component mounting board, a voltage drop resistor with a resistance wire wrapped around an insulating plate is attached to intersect with this component mounting board, and the resistor blows air across the board surface of the resistor. A hair dryer characterized by being installed along the direction.