JP2709684B2 - 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,
More specifically, the present invention has a feature in a fastening structure of a main body case formed by abutting two split cases.

[0002]

2. Description of the Related Art A hair dryer in which a two-piece plastic case is joined to form a main body case is known, for example, from Japanese Utility Model Publication No. 58-56561 and Japanese Utility Model Application Laid-Open No. 54-105782. In this case, the two-piece case abutted with each other is fastened integrally by fitting a tubular body or a ring body around the front and rear ends or at one end thereof, and is integrally fastened. The portion holds the butted state of the portion only by engaging the engaged portion and the engaged portion provided between the butted end edges of the two-piece case.

[0003]

However, the intermediate portion between the front and rear ends of the two-part case is a place in which a heating device such as a heater is housed and arranged, and is particularly susceptible to the influence of heat from the heating device. Therefore, just by engaging the engaged portion and the engaged portion provided between the butting edges of the two-piece case as in the conventional example in which the portion is described above, the engaging portion, the engaged portion, The periphery is easily deformed by heat, and these engagement parts and engaged parts are provided on the inner surface of the case so that the user does not recognize it and do not impair the appearance, so that the engagement is released. It is difficult to divide it at the time of failure or inspection. In particular, since only the front and rear ends of the two-part case are strongly fastened by 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. Along with this deformation, the middle part of the two-piece case becomes jerky with gripping force, and it becomes difficult to grip in combination with the high temperature. In addition, the butt edges of the two-part case are easily separated from each other, and a gap is formed between them, which makes it easy for air to leak from this gap, and also exposes a part of the heating device to cause an electric shock accident. . And saying,
If a screw is used to strongly fasten the butt edges of the middle part of the two-piece case, not only does it take a lot of screw tightening work, but also it is necessary to provide a boss for holding the screw at the butt edge of the two-piece case. This causes the boss to protrude into the ventilation path and disturb the flow of wind,
It is imperative that screw fastening methods be avoided at these locations as much as possible.

Accordingly, an object of the present invention is to provide a main body case in which the front and rear ends of a two-piece case abutted against each other are fastened by a ring body or the like, in a fastening means at an intermediate portion between the front and rear ends. It is an object of the present invention to provide a hair dryer that can be easily gripped at the relevant portion by devising the device, prevent air leakage and omit screw fastening.

[0005]

SUMMARY OF THE INVENTION The present invention includes, in a body case 1 of elongate cylindrical shape in the longitudinal direction by abutting two separate casing 1a · 1b as in the illustrated example, elongated in the longitudinal direction
A heating device 5 provided with a heater wire 16 wound, the blowing device 6
And a hair dryer in which a fastening ring 53 is inserted around the outer periphery of the front end of the two-piece case 1a and 1b, and a cylinder 57 is inserted and fixed at the outer periphery of the rear end. Then, the present invention provides a switch case for the two-part case 1a, 1b.
The heat sink 22 and the heat insulating cylinder 50 are attached. Switch case
Reference numeral 22 denotes an upper wall 23 that is long in the front-rear direction and the left and right of the upper wall 23.
Sectional cross section having side walls 24, 24 provided downward from the ends.
Formed in the shape of a letter, butting of the two divided cases 1a and 1b.
The upper wall 23 and the side wall are provided between the notches 35 and 36
The upper part of 24 ・ 24 is outward from the two-part case 1a ・ 1b
It is clamped and fixed so as to protrude. Switch case 22
Accommodates a power switch 18. The heat insulating cylinder 50 has a cross section
C-shaped and longer than the longitudinal length of the heater wire 16
And has open ends 50a and 50b. This insulation
The tube 50 covers the outer periphery corresponding to the intermediate portion between the front and rear ends of the two-part case 1a and 1b and the position surrounding the heater wire 16 of the heat generating device 5, and the separation ends 50a and 50b.
Are the side walls 24 of the switch case 22 and the two-part case
Covering the mating portion with the notches 35 and 36 of 1a and 1b,
The intermediate part between the front and rear ends of the two-part case 1a, 1b is integrally fastened.

[0006]

The heat-insulating cylinder 50 not only exerts an insulating effect on the outer periphery of the intermediate portion of the two-part case 1a, 1b, but also covers the outer periphery of the intermediate portion of the two-part case 1a, 1b, and abuts the edge of the butt. Demonstrates a fastening function that reliably prevents separation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a 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 as a grip by abutting left and right plastic split cases 1a and 1b to form an elongated cylindrical shape in the front-rear direction. Outlet 2 with suction port 3 at the rear end
And the cord lead-out portion 4 are formed. Inside the main body case 1, a heat generating device 5 and a blower 6 are arranged in front and rear and housed. Attachment 7 such as an outlet nozzle is detachably attached to outlet 2. Body case 1
A switch unit 8 is disposed at a position corresponding to the upper part of the outer periphery of the heat generating device 5.

The blower 6 has a motor 9 and a fan 11 fixed to a shaft 10 protruding from a rear end face of the motor 9. The motor 9 is fitted and fixed in a cylindrical motor holding case 12 made of plastic. Motor holding case 12
A rectifying blade 13 is formed radially and integrally on the outer peripheral surface of the fan guide tube 14, and a fan guide cylinder 14 is integrally formed to protrude rearward from a rear end of the outer periphery of the rectifying blade 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 are extended in the front-back direction.
Is housed inside.

The input terminal 70 at the rear end of the motor 9
As shown in FIG. 1, there is little insulating space between the heating device 5 and the heating device 5, so that 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 protrude. 7 and 8
As shown in the figure, the outer surface of the motor end cap 71 is provided with a bridge diode 7 for rectifying the power supply to the motor 9.
2 and a substrate on which the noise prevention capacitor 73 is arranged. In order to prevent the bridge diode 72 from wobbling, the motor end cap 71 has positioning pins 74 disposed so as to surround the outer periphery of the diode 72.
And a projection 75 having a retaining hook 75a at the tip thereof.
Are arranged between the pair of AC input terminals 76 to prevent a short circuit between the AC input terminals 76. Further, the motor end cap 71 is provided with a projection 77a and projections 77b and 77b located on both sides thereof, and when the bridge diode 72 is incorporated into the motor end cap 71, the AC input terminal 7 is provided between the projections 77a and 77b.
6, so that the AC input terminals 76 are not short-circuited during the assembly.

Before the blower 6 and the heat generator 5 are assembled into the main body case 1, as shown in FIG. Receiving the lead wire 39. A terminal holding tube 28 is provided at the end of the lead wire 39 on the side of the cord lead-out portion, and as shown in FIG.
9a and 29b.

The switch section 8 includes a slide-type power switch 18 for enabling power on / off switching and hot air / cold air switching, and a push type rapid cooling switch 19 for instantaneously switching from hot air to cold air. Is switch case 2
2 in advance. That is, as shown in FIG. 4, the switch case 22 is a plastic molded product and has a U-shaped cross section having an elongated upper and lower wall 23 and side walls 24, 24 extending downward from the left and right ends of the upper wall 23. Be done. The power switch 1 is provided in the switch case 22.
8 and a quenching changeover switch 19 are stored in front and rear. In this case, the power switch 18 is installed between the side walls 24 in the switch case 22 as shown in FIG.
As shown in FIG. 1, the quenching changeover switch 19 is mounted on a substrate 27 provided between the side walls 24 in the switch case 22, and components such as a rectifier are also mounted on the substrate 27. A switch knob 20 for operating the power switch 18 is slidably mounted in the front hole 25 among the holes 25 and 26 opened in the front wall 23 of the switch case 22 in the front and rear directions. A switch knob 21 for operating the quenching changeover switch 19 is mounted in the hole 26 so as to be able to come and go.

The power switch 18 controls the power supply to the heat generating device 5 and the blower 6 to switch the operation state from off to cold, weakly warm, and strongly heated air in this order. In FIG.
The switch 18 has five connection terminals, a first terminal to a fifth terminal, and the switch knob 20 slides stepwise from an off position in a forward direction indicated by an arrow P in FIG. Are connected as shown in the table of FIG. 6 to switch the operation state. The quenching switch 19 is interposed in a circuit between the second terminal and the heater 16a for low-temperature air. When the quenching switch 19 is turned off, the power supply to the heater 16a for low-temperature air is stopped, 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 denotes a control resistor. For example, the resistance value of the heater 16a for weak warm air is 15.7Ω, and the resistance value of the heater 16b for strong warm air is 5.9Ω.
In this case, the resistance value of the control resistor 31 is 112Ω. 32 is a thermal fuse.

The switch unit 8, the heating unit 5, and the blower unit 6, which are connected in advance as described above, are assembled to the main body case 1 in the following manner. First, the left and right two-part cases 1a and 1b are put together, and these two cases 1a and 1b
The heat shield tube 17 of the heat generating device 5 and the fan guide tube 14 of the blower device 6 are held together in front and rear, and the switch case 22 is abutted against each other at the upper part of the peripheral surface of the heat shield tube 17 of the heat generator 5. The divided cases 1a and 1b are sandwiched and fixed between the joints. The switch case 22 is sandwiched and fixed by providing notches 35 and 36 at the abutting edges of the two-part cases 1a and 1b as shown in FIG. 4, and as shown in FIGS. 3 and 5, both cases 1a and 1b. When the upper wall 23 and the side are inserted into the switch case insertion port 34 formed between the notches 35 and 36 when
The upper part of the walls 24, 24 is outward from the two-part case 1a, 1b
It is performed so as to protrude . In this case, as shown in FIG. 3, the front and rear engagement claws 37 provided on both side walls 24 of the switch case 22 are engaged with the rim of the switch insertion port 34 so that the switch 22 is moved upward from the case 22. Is prevented from falling off.

In FIG. 1, an attachment / detachment operation button 45 is provided on the front side of the switch case 22 on the two-part case 1a, 1b to hold and hold the attachment 7 inserted into the outer peripheral wall of the outlet 2. The attachment / detachment operation button 45 is provided between the butting portions of the two-part cases 1a and 1b.
And is always protruded and urged by the spring member 46. A lock claw 47 is provided on the attachment / detachment operation button 45, and this lock claw 47 is attached to the attachment 7.
The attachment 7 is prevented from falling out of the outlet 2 by engaging with a concave portion 48 provided on a part of the inner peripheral surface of the rear end of the attachment 7. When the attachment / detachment operation button 45 is pushed in against the spring force of the spring member 46, the engagement of the lock claw 47 with the concave portion 48 is released, and the attachment 7 can be removed from the outlet 2.

As shown in FIG.
5 is mounted adjacent to the front of the straight wall 49b on the front surface 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. Then, the corner where the straight wall 49b on the front surface and the upper wall 23 intersect is chamfered to the switch case 22 to form the chamfered portion 4.
9a is provided. In a state where the pressing upper surface 45a of the attachment / detachment operation button 45 is pressed down 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 inclined lower end of the chamfered portion 49a. Set to In FIG. 2, the intersection of the pressing upper surface 45a and the lower end of the chamfered portion 49a near the inclined surface is indicated by O.

The detachable operation button 45 mounted on 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 is used when the main body case 1 is used by hand. It is possible to avoid touching the detachable operation button 45 carelessly.

When the attachment 7 is detached, the upper surface 45a of the attachment / detachment operation button 45 is pushed with a fingertip.
At this time, the finger is applied to the chamfered portion 49a as shown in FIG. 2 to facilitate the pressing operation, and the deeper the finger is pressed, the more the chamfered portion 49a is inclined closer to the attaching / detaching operation button 45. Is also received by the chamfer 49a,
Excessive pressing can be suppressed.

After the attachment 7 is detached, the finger 45 is released by the spring member 46 by loosening the finger pressure on the pressing upper surface 45a of the attaching / detaching operation button 45, but the pressing upper surface 45a of the attaching / detaching operation button 45 before being pushed back.
Is located closer to the lower end of the inclined surface of the chamfered portion 49a.
There is no risk that the flesh of the finger will be pinched in the gap between the lower straight wall 49b. Further, since the chamfered portion 49a is upwardly inclined rearward from the detachable operation button 45, a gap formed between the detached operation button 45 to be pushed back and the chamfered portion 49a has an upwardly expanding shape. There is no pinching of fingers.

Next, the heater wire 1 is formed into a C-shaped cross section.
6 is formed to be longer than the length in the front-rear direction,
A heat-insulating cylinder 50 having 50b is inserted into the butted two-piece case 1a and 1b from the front thereof, and thereby insulates the outer circumference of the two-piece case 1a and 1b corresponding to the outer circumference of the heater wire 16 of the heating device 5. In addition to having a structure, the fastening function of maintaining the butted state of the two-part cases 1a and 1b is exhibited. Due to the heat insulating effect of the heat insulating cylinder 50, it is possible to prevent the surface temperature of the relevant portion from being increased by the heat of the heat generating device 5, and it is easy to grasp. In addition, the thermal expansion deformation of the corresponding portion of the two-part case 1a, 1b can be suppressed by the fastening action of the heat insulating cylinder 50. Even if the two-part case 1a, 1b
Even if there is a gap between the butting edges of the above-mentioned portion, the heat-insulating cylinder 50 covering the outer periphery can prevent the ventilation leak.

The open ends 50a and 50b of the heat insulating cylinder 50 are connected to the side walls 24 and 24 of the switch case 22 and the two-part case 1a.
· 1b to cover the mating portion of the cut-out parts 35 and 36 of the
As a result, the air sent by the fan 11 leaks from the joint.
Thereby preventing the exit is, that aesthetically appearance good comb. The heat insulating cylinder 50 is formed by separating retaining projections 58 provided on the inner surface of the front end thereof (see FIG. 4) into two-part cases 1a and 1b.
By engaging with the holes 59 (see FIG. 4) provided in a part of the outer peripheral wall of the air outlet 2, the heat insulating cylinder 50 is prevented from coming out forward. Also, as shown in FIG.
At the rear end of the heat insulating cylinder 50, there are provided expansion restricting claws 51, 51,
A hole 5 in which the claws 51 are provided in the two-part cases 1a and 1b
Engagement at 2 · 52 prevents the heat-insulating cylinder 50 from expanding and deforming on the main body case 1. It is to be noted that the heat insulating cylinder 50 can obtain a higher heat insulating effect by being formed of a material having a high heat insulating effect, for example, a foamed resin, and it is also preferable to provide irregularities on its surface. Furthermore, two-part case 1
Forming a gap between a.1b and the inner surface of the heat insulating cylinder 50 is more advantageous in terms of the heat insulating effect.

A metal fastening ring 53 is inserted through the outer peripheral wall of the outlet 2 of the two-part case 1a, 1b to more reliably maintain the butted state at the front ends of the two-part case 1a, 1b. As shown in FIG. 1, the two-part case 1a
b, a half-split cord outlet tube 5 supported by radial radial ribs 54 at the center of the suction port 3 at the rear end side.
At 55, the terminal holding tube 28 of the lead wire 39 is engaged. First, the lead wire 39 from the cord outlet tube 55 is led out of the case from between the radial ribs 54 of the suction port 3 so as not to be entangled with the fan 11, and the radial ribs 54 are connected to each other. The two-part case 1a, 1b which is again introduced into the case across the connected circumferential ribs 64 and then abuts on the peripheral surface of the fan guide cylinder 14.
The wire is led out of the case through the lead wire outlet 41 formed at the abutting point, and then drawn back into the case.
The lead portion 39a led to the lead wire outlet 41 of the lead wire 39 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
The cover 38 is prevented from floating by engaging the claw 40 with the edge of the lead wire outlet 41.

The end of the swivel type electric cord 43 having the contacts 43a and 43b is inserted into the terminal holding cylinder 28 so that the contacts 43a and 43b are rotatably brought into contact with the terminals 29a and 29b. In this case, the cord outlet tube 5
5, a locking projection 42 is provided inside the rear end, and an annular groove 44 is provided on the outer periphery of the end of 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 filter 56 is inserted from the rear to the outer periphery of the rear end of the cord outlet tube 55, thereby fastening the rear ends of the two-part cases 1a and 1b. I have. This two-part case 1a
A cylinder 57 for fastening the rear end of 1b, the fastening ring 53 for fastening the front end, and a heat insulating cylinder 50 for fastening an intermediate portion.
The butted state of the two-part cases 1a and 1b is firmly held by the three members over the entire length in the longitudinal direction. The suction port filter 56 is provided with engaging claws 60 on the front end side of a cylinder 57, and by engaging the claws 60 with engaging holes 61 provided on the cord outlet cylinder 55, the suction The mouth filter 56 is prevented from falling backward from the cord outlet tube 55. The quenching switch 19 is not always necessary, and therefore, the power switch 18 and its switch knob 20 need only be pre-assembled in the switch case 22.

[0025]

As described above, in the hair dryer of the present invention, the outer periphery corresponding to the intermediate portion between the front and rear ends of the two-part case 1a and 1b and the position surrounding the heating device 5 is covered with the heat insulating cylinder 50. Thereby, the intermediate portions of the two-part cases 1a and 1b are integrally fastened. Therefore, during use, the intermediate portion between the front and rear ends of the two-piece case can be grasped without feeling heat, and furthermore, 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, this gap is covered by the heat insulating cylinder 50, so that ventilation leakage and electric shock accidents can be prevented. In addition, since the mating state can be firmly secured in combination with the ring 53 and the cylinder 57 for fastening the front and rear ends of the two-piece cases 1a and 1b, it is possible to open the two-piece cases 1a and 1b simply by just butting the mating edges. There is no need to separate the screws, the fastening of the screws can be omitted, and the breakdown and the disassembly at the time of inspection can be easily performed. In particular,
The insulation tube 50 is longer than the length of the heater wire 16 in the front-rear direction.
Corresponding to the outer circumference of the entire length of the heater wire 16 in the front-rear direction.
The attachment 7
The attachment 7 as well as the
Even when using as a rosser, always
Heat the intermediate part between the front and rear ends of the split cases 1a and 1b.
Can be grasped without feeling, and further enhance the heat insulation effect
Can be In addition, the switch case 22
The upper part of the wall 23 and the side walls 24, 24 is protruded.
Nipped and fixed between cutouts 35 and 36 of split cases 1a and 1b
Then, the power switch 18 is housed in the switch case 22.
I have paid. Therefore, of the two split cases 1a and 1b,
The heater wire 16 wound to a diameter close to the diameter is
a.1b is disturbed by the power switch 18
It can be stored compactly without any need. Also
Switch case 2 protruding from two-part case 1a, 1b
The upper part of the upper wall 23 and the upper parts of the side walls 24
Slip your hand on the insulation tube 50 when using it for a crosser
It is also advantageous as it stops. Furthermore, switch case
22 and cutouts of two-part case 1a and 1b
The mating part with the parts 35 and 36 is the open end 50 of the heat insulating cylinder 50.
a ・ Because it is covered by 50b, it is sent by fan 11
Wind can be prevented from leaking from the joints, and appearance
Also looks better.

[Brief description of the drawings]

FIG. 1 is an overall vertical side view.

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

FIG. 3 is an enlarged sectional view taken along line BB in FIG. 1;

FIG. 4 is an exploded perspective view.

FIG. 5 is an enlarged sectional view taken along line AA in FIG. 1;

FIG. 6 is an electric circuit diagram.

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

FIG. 8 is a perspective view showing a state in which a motor end cap and electric components are separated from a rear end of the motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 1a, 1b Division | segmentation case 5 Heat generation apparatus 6 Blower 50 Heat insulation cylinder 53 Fastening ring 57 cylinder

Claims (1)

(57) [Claims] 1. A two-piece case 1a · 1b in the longitudinal direction against the inside of the main body case 1 of elongate cylindrical shape, before
Heating device 5 having heater wire 16 wound long in the backward direction
And the blower 6 are arranged in front and rear, and are housed.
The fastening ring 53 to the front end outer periphery of a · 1b, the hair dryer comprising a tubular 57 inserted respectively fixed to the rear end outer periphery, the switch case 22 in two separate casing 1a · 1b and the cross-sectional
A heat cylinder 50 is attached, and the switch case 22 has an upper wall 23 that is long in the front-rear direction and
Side walls 24, 24 extending downward from the left and right ends of the upper wall 23;
The two-part case 1a is formed in a U-shaped cross section having
・ The upper wall is located between the notches 35 and 36 at the butt edge of 1b.
23 and the upper parts of the side walls 24, 24 are divided into two cases 1a.
1b , the power switch 18 is housed and fixed so as to protrude outward.
The heat insulating cylinder 50 has a C-shaped cross section and is in front of the heater wire 16.
Separated ends 50a and 50b formed longer than the rearward length
The heat-insulating cylinder 50 covers the outer periphery corresponding to the intermediate portion between the front and rear ends of the two-part case 1a and 1b and the position surrounding the heater wire 16 of the heating device 5, and has an open end. 50a ・ 5
0b is a two-part case with the side walls 24 of the switch case 22.
Cover the mating portions of the bases 1a and 1b with the cutouts 35 and 36.
A hair dryer characterized in that an intermediate portion between the front and rear ends of the two-part case 1a, 1b is integrally fastened.