JPH0759617A - Hair drier - Google Patents

Abstract

PURPOSE:To grasp the intermediate part of two-split cases without feeling heat by covering the outer periphery of the intermediate part of the two-split cases corresponding to the position for covering a heating device with a heat insulating cylinder. CONSTITUTION:Two-split cases 1a, 1b butted against each other are inserted from the front thereof in a heat insulating cylinder 50 having a C-shaped section, whereby the outer peripheries of the two-split cases 1a, 1b corresponding to the outer periphery of a heating device 5 have a heat insulation structure, and a fastening function of holding the butting state of the two-split cases 1a, 1b is exhibited. The surface temperature of that portion can be prevented from being raised by heat of the heating device 5 by the heat insulating action of the heat insulating cylinder 50 so as to be easy to grasp. Thermal expansion deformation of that portion of the two-split cases 1a, 1b can be restrained by the fastening action of the heat insulating cylinder 50 so that, even if a gap is produced between the butted ends of the two-split cases 1a, 1b at that portion by thermal deformation, leakage of air can be prevented by the heat insulating cylinder 50 for covering the outer periphery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dryer,
More specifically, it is characterized by a fastening structure of a main body case formed by abutting two divided cases.

[0002]

2. Description of the Related Art In a hair dryer, a body case formed by abutting plastic two-piece cases is known, for example, from Japanese Utility Model Publication No. 58-56561 and Japanese Utility Model Publication No. 54-105782. In this case, a two-part case that is butted against each other is fitted integrally with a cylindrical body or a ring body at the front and rear ends of the case or at the outer periphery of either one of them, but at an intermediate portion between the front and rear ends, that is, a grip. The portion holds the abutted state of the relevant portion only by engaging the engaged portion and the engaged portion provided between the abutting end edges of the two-divided case.

[0003]

However, the intermediate portion between the front and rear ends of the two-piece case is a portion in which a heat generating device such as a heater is housed and arranged, and is particularly susceptible to heat from the heat generating device. Therefore, as in the prior art example in which the location has been described above, the engaging portion and the engaged portion are not provided only by engaging the engaging portion and the engaged portion provided between the abutting end edges of the two-divided case. The surrounding area is easily deformed by heat, and these engaging and engaged parts are provided on the inner surface of the case so that they cannot be seen by the user and the appearance is not damaged. It is difficult to make them and it is difficult to divide them at the time of breakdown or inspection. In particular, since only the front and rear ends of the two-part split case are strongly fastened together with a ring body or the like, thermal expansion deformation is likely to occur locally at an intermediate portion where the abutting state between the front and rear ends is rough. As a result of this deformation, the middle part of the two-part case becomes jerky due to the grip force, and it becomes difficult to grip due to the high temperature. Not only that, the abutting edges of the two-part split case are easily separated from each other, and a gap is created between them, which easily causes air leakage, and exposes part of the heat generating device, which may cause an electric shock accident. . I mean,
If a screw is used to strongly tighten the abutting edges of the middle part of the two-piece case, not only the number of steps for tightening the screw is required, but also a boss for holding the screw needs to be provided at the abutting edge of the two-piece case. Occurs, and this boss projects into the ventilation passage and disturbs the flow of wind, so
It is important to avoid fastening with screws at these points as much as possible.

Therefore, an object of the present invention is to provide a fastening means at an intermediate portion between the front and rear ends of the main body case in which the front and rear ends of the two divided cases that are butted against each other are fastened with a ring or the like. It is to provide a hair dryer that makes it easy to grasp the location by making some efforts, prevents air leakage, and eliminates screw fastening.

[0005]

According to the present invention, as shown in the figure, a heat generating device 5 and a blower device 6 are arranged back and forth inside a body case 1 having a cylindrical shape elongated in the front-rear direction by abutting the two divided cases 1a and 1b. 2 case 1a / 1
It is assumed that a hair dryer is formed by inserting and fixing a fastening ring 53 on the outer circumference of the front end of b and a tube 57 on the outer circumference of the rear end. In addition, the present invention is based on the two-part split cases 1a and 1b.
The outer periphery corresponding to the position intermediate the front and rear ends and covering the heat generating device 5 is covered with a heat insulating cylinder 50 to form the two-part case 1.
The intermediate parts of a and 1b are integrally fastened.

[0006]

The heat insulating cylinder 50 not only exerts the heat insulating effect on the outer periphery of the intermediate portion of the two-part split cases 1a and 1b, but also covers the outer periphery of the intermediate portion of the two-part split cases 1a and 1b to bring the abutting edges of the corresponding parts together. Demonstrates a fastening function that reliably prevents separation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the hair dryer according to the present invention will be described with reference to FIGS. In FIG. 1 and FIG. 5, the main body case 1 serves also as a grip by forming the left and right plastic two-piece split cases 1a and 1b into a slender cylindrical shape in the front-rear direction, and also serves as a grip. Outlet 2 and suction port 3 at the rear end
And a cord lead-out portion 4 are formed respectively. Inside the main body case 1, a heat generating device 5 and a blower device 6 are arranged front and back and housed. An attachment 7 such as a blowing nozzle is removably attached to the outlet 2. Body case 1
A switch portion 8 is arranged at a position corresponding to the upper portion of the outer circumference of the heat generating device 5 inside.

The blower 6 has a motor 9 and a fan 11 fixed to a shaft 10 protruding from the rear end surface of the motor 9. The motor 9 is internally fitted and fixed in a cylindrical motor holding case 12 made of plastic. Motor holding case 12
The straightening vanes 13 are radially formed integrally on the outer peripheral surface of the fan guide tube 14, and the fan guide cylinder 14 is integrally formed so as to project rearward from the rear end of the outer circumference of the straightening vane 13. The fan 11 is housed with a predetermined gap between its tip and the inner wall of the fan guide cylinder 14.

In the heat generating device 5, a heater wire 16 is wound around a cross-shaped insulating plate 15 in a front view, and the insulating plate 15 and the heater wire 16 have a heat shield cylinder 17 long in the front-rear direction.
It is stored inside.

Here, the input terminal 70 at the rear end of the motor 9
Since the insulating space between the heat generating device 70 and the heat generating device 5 is small as shown in FIG. 1, a motor end cap 71 made of an insulating material is provided at the rear end of the motor 9 as shown in FIG.
-70 is fitted so as to project. 7 and 8
As shown in, the outer surface of the motor end cap 71 has a bridge diode 7 for rectifying the power supply to the motor 9.
2 also serves as a substrate on which the noise prevention capacitor 73 is arranged. Further, the motor end cap 71 has a positioning pin 74 arranged so as to surround the outer circumference of the diode 72 in order to prevent the bridge diode 72 from wobbling.
And a projection 75 having a retaining hook 75a at its tip. Particularly, the projection 75 is a bridge diode 72.
It is arranged so as to be located between the pair of AC input terminals 76, 76 to prevent short circuit between the AC input terminals 76, 76. Further, the motor end cap 71 is provided with a projection 77a and projections 77b, 77b located on both sides thereof, and when the bridge diode 72 is incorporated in the motor end cap 71, the AC input terminal 7 is provided between the projections 77a, 77b.
By passing through 6, the AC input terminals 76 and 76 are prevented from being short-circuited even when they are assembled.

Before being incorporated in the main body case 1, the blower device 6 and the heat generating device 5 are preliminarily connected together with the switch portion 8 and the like, and power is supplied from the cord drawing portion 4 as shown in FIG. Has a lead wire 39 for receiving. A terminal holding cylinder 28 is provided at the end of the lead wire 39 on the cord pull-out side, and the terminal 2 is provided in the cylinder 28 as shown in FIG.
It has 9a and 29b.

The switch section 8 includes a slide type power source switch 18 capable of switching on / off the power source and switching between hot air and cold air, and a push type rapid cooling changeover switch 19 capable of instantaneously switching from hot air to cold air. Switch case 2
Pre-assembled in 2. That is, as shown in FIG. 4, the switch case 22 is a plastic molded product, and is formed in a U-shaped cross-section having a long and narrow upper wall 23 and side walls 24 and 24 extending downward from the left and right ends of the upper wall 23. It will be done. The power switch 1 is provided in the switch case 22.
8 and the rapid cooling changeover switch 19 are arranged in front and in back and stored. In this case, as shown in FIG. 5, the power switch 18 is installed between the side walls 24 and 24 in the switch case 22.
As shown in FIG. 1, the rapid cooling changeover switch 19 is mounted on a board 27 that is installed between the side walls 24 and 24 in the switch case 22, and the board 27 is also mounted with components such as a rectifier. In addition, a switch knob 20 for operating the power switch 18 is slidably mounted in the front-rear direction in the front hole 25 of the holes 25 and 26 opened in the upper wall 23 of the switch case 22 in the front-rear direction. A switch knob 21 for operating the rapid cooling changeover switch 19 is mounted in the hole 26 so as to be retractable.

The power switch 18 controls energization to the heat generating device 5 and the blower device 6 to switch the operating state from off to cool air / weak warm air / strong warm air in this order. In FIG.
The switch 18 has five connecting terminals of first to fifth terminals, and the switch knob 20 is slid from the OFF position in the forward direction indicated by arrow P in FIG. Are connected as shown in the table of FIG. 6 to switch the operating state. The rapid cooling changeover switch 19 intervenes in the circuit between the second terminal and the heater 16a for the weak warm air. When the rapid cooling changeover switch 19 is turned off, the heater 16a for weak hot air is de-energized, and at the same time, the voltage value applied to the rectifier 30 increases and the rotation speed of the motor 9 increases. In FIG. 6, reference numeral 31 is a control resistor, for example, the resistance value of the heater 16a for low temperature air is 15.7Ω and the resistance value of the heater 16b for high temperature air is 5.9Ω.
In this case, the resistance value of the control resistor 31 is 112Ω. Reference numeral 32 is a thermal fuse.

The switch portion 8, the heat generating device 5 and the blower device 6 which are pre-wired as described above are assembled to the main body case 1 in the following manner. First, the left and right two-part split cases 1a and 1b are butted to each other,
The heat shield cylinder 17 of the heat generator 5 and the fan guide cylinder 14 of the blower device 6 are laid in front of and behind each other, and the switch case 22 is butted against each other above the peripheral surface of the heat shield cylinder 17 of the heat generator 5. The divided cases 1a and 1b are fixed by being sandwiched between the butt joints. As shown in FIG. 4, the switch case 22 is sandwiched and fixed by providing notches 35 and 36 at the abutting edges of the two-part split cases 1a and 1b, respectively, and as shown in FIGS. 3 and 5, both cases 1a and 1b. When they are abutted against each other, they are fitted into a switch case fitting opening 34 formed between the notches 35 and 36. In this case, as shown in FIG. 3, both side walls 24 of the switch case 22 are
By engaging the front and rear engaging claws 37 respectively provided on 24 with the rim of the switch fitting port 34,
It is possible to prevent the above from coming off.

In FIG. 1, on the front side of the switch case 22 on the two-part split cases 1a and 1b, an attachment / detachment operation button 45 for retaining and holding the attachment 7 inserted in the outer peripheral wall of the outlet 2 is attached. The attachment / detachment operation button 45 includes a spring member 46 between the abutments of the two split cases 1a and 1b.
The spring member 46 is constantly biased to project and retract. The attachment / detachment operation button 45 is provided with a lock claw 47, and the lock claw 47 is attached to the attachment 7
The attachment 7 is prevented from coming off from the blow-out port 2 by engaging with the recess 48 provided in a part of the inner peripheral surface of the rear end. When the attachment / detachment operation button 45 is pressed against the spring force of the spring member 46, the engagement of the lock claw 47 with the recess 48 is released, and the attachment 7 can be removed from the outlet 2.

As shown in FIG. 2, the attaching / detaching operation button 4
5 is mounted adjacent to the front side of the front straight wall 49b of the switch case 22 and lower than any of the switch knobs 20 and 21 provided on the upper wall 23 of the switch case 22. The chamfered portion 4 is formed on the switch case 22 by chamfering the corner where the straight wall 49b and the upper wall 23 at the front of the switch case 22 intersect.
9a is provided. In the state in which the pressing upper surface 45a of the attachment / detachment operation button 45 is pushed most strongly and the lock claw 47 is disengaged from the concave portion 48 of the attachment 7 (solid line state in FIG. 2), the pressing upper surface 45a intersects with the chamfered portion 49a near the lower end of the inclined surface. Set to do. In FIG. 2, an intersection O between the pressing upper surface 45a and the inclined surface lower end portion of the chamfered portion 49a is indicated by O.

As described above, the attachment / detachment operation button 45 attached to the lower portion of the front end of the switch case 22, that is, the lower portion on the front end side of the main body case 1 has its gripping hand when the main body case 1 is being used by hand. Thus, it is possible to avoid touching the attachment / detachment operation button 45 carelessly.

When the attachment 7 is removed, the pressing upper surface 45a of the attachment / detachment operation button 45 is pressed with a fingertip.
At this time, the finger makes it easier to press the chamfered portion 49a as shown in FIG. 2, and the deeper the pressure, the closer the chamfered portion 49a is to the detachable operation button 45. Is received by the chamfer 49a,
Excessive pressing can be suppressed.

After the attachment 7 is detached, the button 45 is pushed back by the spring member 46 by loosening the finger pressure on the pressing upper surface 45a of the attaching / detaching operation button 45. The pressing upper surface 45a of the attaching / detaching operation button 45 before this pressing back is performed.
Is located near the lower end of the inclined surface of the chamfered portion 49a, the chamfered portion 49a of the button 45 and the switch case 22 is located.
There is no risk of finger meat being caught in the gap between the lower straight wall 49b. Further, since the chamfered portion 49a inclines rearward from the attachment / detachment operation button 45, the gap formed between the attachment / detachment operation button 45 pushed back and the chamfered portion 49a has an upward spread shape, and in the meantime. There is no need to pinch your fingers.

Next, the heat insulating cylinder 50 having a C-shaped cross section is inserted into the two divided cases 1a and 1b which are butted against each other from the front thereof, whereby the outer circumference of the two divided cases 1a and 1b corresponding to the outer circumference of the heat generating device 5. Has a heat insulating structure, and also exerts a fastening function for holding the abutment state of the two-part split cases 1a and 1b. Due to the heat insulating function of the heat insulating cylinder 50, the surface temperature of the relevant portion can be prevented from becoming high due to the heat of the heat generating device 5, and it becomes easy to grip. Further, the thermal insulation deformation of the corresponding portions of the two-part split cases 1a and 1b can be suppressed by the tightening action of the heat insulating cylinder 50, and even if the two-part split cases 1a and 1b are thermally deformed.
Even if there is a gap between the abutting end edges of the portion b, the heat insulating cylinder 50 covering the outer periphery can prevent ventilation leakage.

The open ends 50a and 50b of the heat insulating cylinder 50 are separated from the side walls 24 and 24 of the switch case 22 and the two-part split case 1a.
The joint with 1b is covered with a good appearance.
This heat insulating cylinder 50 has holes 59 and 59 (see FIG. 4) provided with retaining projections 58 and 58 (see FIG. 4) provided on the inner surface of the front end thereof in a part of the outer peripheral wall of the air outlet 2 of the two-divided cases 1a and 1b. )
The heat insulating cylinder 50 is prevented from coming out forward by engaging with. Further, as shown in FIG. 4, expansion restricting claws 51, 51 are provided at the rear end of the heat insulating cylinder 50, and the claws 51, 51 are provided with holes 52.
By engaging with 52, the heat insulating cylinder 50 is prevented from expanding and deforming on the main body case 1. If the heat insulating cylinder 50 is made of a material having a high heat insulating effect, for example, foamed resin, a higher heat insulating effect can be obtained, and it is also preferable to provide irregularities on the surface thereof. Furthermore, the two-part split case 1a
Forming a gap between 1b and the inner surface of the heat insulating cylinder 50 is more advantageous in terms of heat insulating effect.

A metal fastening ring 53 is inserted on the outer peripheral wall of the air outlet 2 of the two-part split cases 1a and 1b to more reliably maintain the abutted state at the front ends of the two-part split cases 1a and 1b. As shown in FIG. 1, the two-part split case 1a.1
On the rear end side of b, the cord outlet cylinder 5 of the half-split type supported by radial radial ribs 54 at the center of the suction port 3 thereof.
The terminal holding cylinder 28 of the lead wire 39 is joined at 5.55. The lead wire 39 from the cord outlet cylinder 55 is first led out from the space between the radial ribs 54, 54 of the suction port 3 to the outside of the case so as not to be entangled with the fan 11, and the radial ribs 54, 54 are connected to each other. The two split cases 1a and 1b that are introduced again into the case by straddling the connected circumferential ribs 64 and then abut each other on the circumferential surface of the fan guide cylinder 14.
After being led out of the case from the lead wire lead-out port 41 formed at the butting point, the sheet is drawn into the case again.
The lead-out portion 39a of the lead wire 39 led out to the lead wire lead-out port 41 is covered with a cover portion 38 extending to the rear end side of the switch case 22. The cover portion 38 has an engaging claw 4
0 is provided to prevent the cover 38 from rising by engaging the claw 40 with the edge of the lead wire outlet 41.

Further, an end portion having contacts 43a and 43b of the swivel type electric cord 43 is inserted into the terminal holding cylinder 28 so that the contacts 43a and 43b are rotatably contacted with the terminals 29a and 29b. In this case, the cord outlet cylinder 5
5, a locking projection 42 is provided inside the rear end of the electric cord 43, an annular groove 44 is provided on the outer periphery of the end of the electric cord 43, and the end of the electric cord 43 is tied with a cord outlet tube 55 to lock the electric cord 43. The projection 42 is locked in the annular groove 44, and the electric cord 43 is rotatably mounted.

Further, a tube 57 provided at the center of the suction port filter 56 is inserted into the outer periphery of the rear end of the cord outlet tube 55 from the rear side thereof so that the rear end portions of the two split cases 1a and 1b are fastened. There is. This split case 1a
The cylinder 57 that fastens the rear end of 1b, the fastening ring 53 that fastens the front end, and the heat insulating barrel 50 that fastens the intermediate portion.
By these three members, the butted state of the two-part split cases 1a and 1b is firmly held over the entire length in the front-rear longitudinal direction. The suction port filter 56 is provided with engaging claws 60, 60 on the front end side of the cylinder 57, and by engaging the claws 60, 60 with the engaging holes 61, 61 provided in the cord outlet cylinder 55, the suction claws 60, 60 are formed. The mouth filter 56 is prevented from slipping backward from the cord outlet cylinder 55. The rapid cooling changeover switch 19 is not always necessary, and therefore the switch case 22 may have at least the power switch 18 and its switch knob 20 previously assembled.

[0025]

As described above, in the hair dryer of the present invention, the heat insulating cylinder 50 covers the outer periphery corresponding to the intermediate position between the front and rear ends of the two-piece casings 1a and 1b and the position where the heating device 5 is covered. As a result, the intermediate portions of the two-part split cases 1a and 1b are integrally fastened. Therefore, at the time of use, the intermediate portion between the front and rear ends of the two-part split case can be grasped without feeling heat, and further, the thermal expansion deformation of the portion can be suppressed, and even if it is slightly deformed, a gap is formed between the butt edges. Even if possible, since this gap is covered by the heat insulating cylinder 50, it is possible to prevent ventilation leakage and electric shock accidents. Further, since the abutting state can be firmly secured together with the ring 53 and the tube 57 that fasten the front and rear ends of the two-divided cases 1a and 1b, respectively, the abutting edges of the two-divided cases 1a and 1b can be simply opened. There is no need to separate them, and screw fastening can be omitted, and breakdown and disassembly during inspection are easy.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional side view.

FIG. 2 is a side view of an attachment / detachment operation button portion of the attachment.

FIG. 3 is an enlarged sectional view taken along line BB in FIG.

FIG. 4 is an exploded perspective view.

5 is an enlarged cross-sectional view taken along the line AA in FIG.

FIG. 6 is an electric circuit diagram.

FIG. 7 is a front view of a rear end portion of a motor.

FIG. 8 is a perspective view showing a state where a motor end cap and electric parts are separated from a rear end portion of a motor.

[Explanation of symbols]

 1 main body case 1a and 1b split case 5 heat generating device 6 blower device 50 heat insulating tube 53 fastening ring 57 tube

Claims (1)

[Claims] 1. A heat generating device 5 and a blower device 6 are arranged front and back in a cylindrical main body case 1 which is slender in the front-rear direction by butting the two separate cases 1a and 1b, and is housed. In a hair dryer in which a fastening ring 53 is inserted and fixed on the outer circumference of the front end and a tube 57 is fixed on the outer circumference of the rear end, a position at an intermediate portion between the front and rear ends of the two-part split cases 1a and 1b and which covers the heat generating device 5. A hair dryer characterized in that the outer periphery corresponding to is covered with a heat insulating cylinder 50 and the intermediate portions of the two-part split cases 1a and 1b are integrally fastened.