JPH0856740A - Hair drier - Google Patents

Abstract

PURPOSE: To protect hair or parts in a main body case by disconnecting or reducing heat generation of a heater in the case where a blow port gets excessively close to the hair, or in the condition where the blow port is closed, in a portable type hair drier having the blow port at a front end of the main body case. CONSTITUTION: A normally closed type safety switch 40 which can be freely protruded/retracted is installed around a blow port 2 provided at a front end of a main body case 1 to be protruded forward from the front end of the main body case 1. When the safety switch 40 is pushed by external force of hair or the like to be retracted, energization to a heater 3 is disconnected, or energization quantity is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dryer which is provided with safety measures when the air outlet is too close to the hair.

[0002]

2. Description of the Related Art In a hair dryer, various attachments such as a brush, a comb and a nozzle are selectively attached to an outlet provided at a front end of a body case of the hair dryer. Around the air outlet, there is no protrusion protruding from the front end of the main body case, so that when the attachment is removed, the air outlet is located at the frontmost end of the main body case.

[0003]

When the attachment is attached, a certain distance is maintained between the tip of the attachment and the outlet so that the outlet does not come too close to the hair during use. However, when the attachment is removed and used, warm air may continue to be emitted without noticing that the outlet is too close to the hair. for that reason,
Hair may be damaged by exposure to excessively hot air. Further, during use, the hair dryer may be temporarily placed on a washbasin or the like with the blowout port facing downward while keeping the hot air blown out. In that case, if the air outlet is blocked by the upper surface of the washbasin, etc., the heat of the heater is trapped in the main body case, the temperature in the main body case rises excessively, and the parts in the main body case are thermally damaged, The top surface of the washbasin may be burnt. In particular, such a problem is likely to occur remarkably when the main body case is formed into a compact shape that can be held by the palm, such as the hair dryer described in Japanese Utility Model Publication No. 33-5255.

An object of the present invention is to provide a hair dryer which can improve the safety when the blowout port comes too close to the hair. Another object of the present invention is to provide a hair dryer that has taken safety measures when the air outlet is placed downward on a wash basin or the like.

[0005]

As shown in the illustrated example, the present invention is a hair dryer in which a blower outlet 2 is provided at the front end of a main body case 1 having a heater 3 and a blower unit 4 built therein. Normally-closed safety switch 40
Is provided so as to project forward, and the safety switch 40 is configured to cut off the energization to the heater 3 or reduce the energization amount by the immersing operation. By immersing the safety switch 40, not only the heater 3 but also the blower 4 can be turned off at the same time.

[0006]

Operation When the hot air is blown out from the outlet 2 without using the attachment and the outlet 2 comes too close to the hair and the safety switch 40 is pressed by the hair and is immersed, at least the heater 3 is energized. Is cut off or reduced. Therefore, the heat generation of the heater 3 is not stopped or the heat generation amount is reduced, and the hair is not heated by hot air more than necessary. When the air outlet 2 is separated from the hair until the safety switch 40 is released from the pressing force on the hair, the safety switch 4 is released.
When 0 is returned to the original closed state, the heater 3 is energized as before, and hot air of a predetermined temperature is blown out from the air outlet 2. When the blower outlet 2 is placed face down on a wash basin or the like, the weight of the hair dryer is added to the safety switch 40 and the switch 4
Since 0 immerses, the power supply to the heater 3 is cut off or reduced.

[0007]

Therefore, according to the present invention, when the blowout port 2 comes too close to the hair, the safety switch 40 immediately stops the heat generation of the heater 3 or the heat generation amount is reduced, so that the hair is It can effectively prevent being damaged by being heated at a higher temperature than necessary. Even when the hot air is continuously discharged from the air outlet 2 and the air outlet 2 is faced downward, the safety switch 40 is also installed temporarily.
The heat generated by the heater 3 is stopped or the amount of heat generated is reduced due to the action of the heater 3, so that it is possible to prevent the temperature inside the main body case 2 from rising excessively and to prevent heat damage to the interior parts and burn of the washbasin. It can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hair dryer according to the present invention will be described with reference to the drawings. 1 and 2, this hair dryer is provided with a blowout port 2 at the front end of a main body case 1, a heater 3 and a blower section 4 in the main body case 1.
And a control unit 6 for controlling the energization of the heater 3 and the blower unit 4 in accordance with the switching operation of the switch knob 5, and the attachment 7 is detachably attached to the outlet 2. There is. The body case 1 is covered with a bottomed cylindrical outer cylinder 11 having a front end opened and a rear end closed on the outer side of an inner cylinder 10 having penetrating openings at both front and rear ends, and the both cylinders 10 and 11 are screwed with screws 12, etc. They are integrally connected to each other, and an air outlet 2 is formed in a front end opening of the inner cylinder 10, and an outer suction port 13 is formed between front ends of the inner and outer cylinders 10 and 11.

In FIG. 1, the inner cylinder 10 has a peripheral wall 14 made of a plastic material having excellent heat resistance, in which a blowout port 2 is formed in a front end opening and an inner suction port 15 is formed in a rear end opening. The front end of the peripheral wall 14 is outwardly extended on the outer periphery of the outlet 2 to extend rearward to form a rear flange 16 having a U-shaped cross section. Inside the inner cylinder 10, the heater 3 and the blower unit 4 are housed in front and rear.

As shown in FIGS. 1 and 6, the blower unit 4 applies a DC voltage to the DC motor 17, an axial blower fan 19 fixed to the rotating shaft of the DC motor 17, and the motor 17. It has a rectifying circuit 20 and rectifying blades 21 arranged radially around the motor 17. In FIG. 6, 17a is a motor resistance. In the blower unit 4, a ring 21a integrally formed on the outer periphery of the rectifying blade 21 is integrally connected to the rear end of the inner cylinder 10 in the inner cylinder 10 so that the motor 17 faces forward and the blower fan 19 faces rearward. It will be stored.
The outer circumference of the blower fan 19 is surrounded by a fan cylinder 22 fitted and fixed to the outer circumference of the ring 21a, and the inner suction port 15 is formed on the rear end side of the fan cylinder 22.

In FIGS. 1 and 3, the heater 3 is housed and arranged from the outer periphery of the motor 17 in the inner cylinder 10 toward the front thereof via a heater support plate 23. Heater support plate 2
3 is made of an insulating material, and is composed of a cylindrical portion 24 fitted and fixed to the outer periphery of the motor 17 and four radiation plates 25 radially extending from the outer periphery at 90 ° intervals.
The heater 3 is spirally wound around the notch groove formed on the outer edge of the heater 5. Inside the inner cylinder 10, a ventilation passage 26 is formed by the radiation plate 25, which is divided into four in the inner circumferential direction.

In FIGS. 1 and 3, the outer cylinder 11 is made of a plastic material having excellent heat resistance and is formed into a bottomed cylinder having a size that can be held by the palm, and an aluminum plating layer is formed on the surface of the outer cylinder 11 for designing. It has a beautiful appearance. A plurality of spacers 27 are radially and integrally formed on the inner periphery of the outer cylinder 11 at equal intervals in the circumferential direction, and each spacer 27 is a plate continuous from the vicinity of the front end opening of the outer cylinder 11 to the rear bottom portion 29. It is formed into a shape.

Thus, in order to connect the outer cylinder 11 and the inner cylinder 10 to each other, the rear end side of the inner cylinder 10 is fitted to the inner periphery of the spacer 27 of the outer cylinder 11 from the front thereof to a predetermined depth. By this fitting, the boss 30 provided between the spacers 27, 27 in the outer cylinder 11 and the boss 31 provided in the rearward facing flange 16 of the inner cylinder 10 are butted against each other, and the screw 12 is attached to one boss 31. Both cylinders 10 and 11 are integrally connected by screwing through the hole into the prepared hole of the other boss 30.

When the inner and outer cylinders 10 and 11 are joined together, the size of the front end of the outer cylinder 11 is set so that the front end of the outer cylinder 11 fits near the center of the annular groove in the rearward facing flange 16 of the inner cylinder 10 in the depth direction. An outer suction port 1 having a U-shaped cross section that opens rearward between the front end portion of the outer cylinder 11 and the rearward facing flange portion 16.
3 is formed in an annular shape, and this outer suction port 13 is
The inside suction port 15, that is, the suction side of the blower fan 19 is communicated with the outside air introduction path 32 formed between the 11 and the spacer 27 via the outside air introduction path 32. In addition, it is preferable to attach a filter 18 to the outside suction port 13 for preventing intrusion of dust and hair.

At this time, when the blower fan 19 rotates as the motor 17 is driven, the outside air is sucked through the outer suction port 13 and blows through the outer air introduction passage 32 between the inner and outer cylinders 10 and 11 and the inner suction port 15. The air is blown forward of the fan 19 in the axial direction. The air blown forward of the blower fan 19 in the axial direction is rectified by the rectifying blades 21 and the ventilation passage 26 in which the heater 3 exists.
It is blown out from the outlet 2 through the inside.

In use, as shown in FIG. 7, the outer cylinder 11 grasps the rear bottom portion 29 of this outer surface with the palm and holds the fingertips forward. In this case, the outer suction port 13 has the outer cylinder 11 therein. Since it is provided on the front end side, there is no possibility of being blocked by the hand holding it. Therefore, the amount of air blown from the air outlet 2 is stable, and the air can be efficiently applied to the hair. Further, the temperature inside the inner cylinder 10 does not rise abnormally when warm air is used, and each component inside the inner cylinder 10 can be prevented from being damaged by heat, and the durability thereof can be improved. Since the outer suction port 13 is not blocked, the temperature of the warm air blown from the blowout port 2 can be maintained at a predetermined temperature, and the hair is not damaged by the heat.

When the rear side of the front end of the outer surface of the outer cylinder 11 is gripped by the palm, the outlet port 2 coincides with the direction of the fingertip. Easy to move freely along the surface. Therefore, the wind blown from the outlet 2 can be easily applied to a desired portion on the surface of the head, and the usability is good including the ease of holding. Outside suction port 13
Exists on the outer periphery of the outlet 2, but is opened toward the rear side of the main body case 1 in the opposite direction to the outlet 2 via the rearward facing flange 16. Therefore, the air sucked into the outer suction port 13 does not enter the main body case 1 and the air is blown into the blowout port 2 as it is.
There is no possibility of being blown forward with the wind blown from. Further, there is no fear that the hair blown up by the wind from the outlet 2 will be sucked into the outer inlet 13.

The entire inner surface of the outer cylinder 11 facing the outside air introduction passage 32 is constantly cooled by the outside air sucked from the outside suction port 13. Moreover, the outside air in the outside air introduction passage 32 also serves as an effective heat insulating layer, and suppresses the outer cylinder 11 from being heated by the heat generated from the heater 3 and the motor 17 of the blower unit 4. Therefore, when the outer surface of the outer cylinder 11 is gripped by the palm, it is difficult to feel discomfort due to heat and the usability is good.

As described above, when the outer cylinder 11 is used, the rear bottom portion 29 of the outer surface is grasped by the palm and the fingertips are held forward. At this time, the rear bottom portion 29 of the outer cylinder 11 is grasped by the palm. A finger-hanging member 33 is attached to the bottom portion 29 of the fingertip 29 so that it can be surely gripped and the fingertip can be easily used.
The finger hanging member 33 is composed of a leg 33a and a disc-shaped brim portion 33b integrally formed on the rear end side of the leg 33a. The front end portion of the leg 33a is provided at the center of the outer surface of the bottom portion 29 at the rear of the outer cylinder 11. It is fitted and fixed in the recess 34. Collar portion 33 for the leg 33a
The overhanging dimension of b in the radial direction corresponds to the thickness of one finger, and two fingers can be inserted with the leg 33a sandwiched between the collar portion 33a and the bottom portion 29 at the rear of the outer cylinder 11. Is done. Therefore, for example, as shown in FIG. 7, the leg 33a of the finger hooking member 33 is sandwiched between the index finger and the middle finger, and the palm holds the outer surface of the bottom portion 29 at the rear of the outer cylinder 11. At this time, the finger hanging member 3
Since the collar part 33b of 3 is caught on the instep side of both fingers, it is possible to easily hold the entire hair dryer without applying force to the other fingers, and it is more certain that the hair dryer will slip off the palm during use. It can be prevented.

The above-mentioned slide type switch knob 5 is installed at the position where the fingertip is located on the outer surface of the outer cylinder 11. As the switch knob 5 is operated with a fingertip, energization of the heater 3 and the blower unit 4 is controlled. As shown in FIGS. 2 and 6, the control unit 6 includes a switch knob 5
It is provided with a first switch 35 and a second switch 36 that are switched in accordance with the operation of. The first switch 35 is a switch that selectively switches the first to third contacts 35a to 35c by the movable contact 35d, and is interposed in the common circuit of the heater 3 and the blower unit 4. Moving contact 35d
Is a commercial AC power source 39 via a power cord 37 described later.
Connected to. The movable contact 35d is connected to the first contact 35a when the switch knob 5 is at the initial stage position, opens a circuit connected to the commercial AC power supply 39, and the switch knob 5 is turned to 2
The second contact 35b or the third contact when in the third or third step
The circuit connected to the contact 35c and connected to the commercial AC power supply 39 is closed. The second switch 36 interposes the heater 3 only when the switch knob 5 is operated to the third switching position, that is, when the movable contact 35d of the first switch 35 is connected to the third contact 35c. Close the heater circuit. Therefore, when the switch knob 5 is operated to the second-stage switching position, cold air is blown out from the air outlet 2, and when the switch knob 5 is operated to the third-stage switching position, hot air is emitted from the air outlet 2.

The power cord 37 is led out from a part of the outer periphery of the rearward facing collar 16 of the inner cylinder 10. As shown in FIG.
The lead-out portion is positioned so as to face the switch knob 5. One end of the power cord 37 is the switch knob 5
To the first switch 35, and the other end is connected to a power plug (not shown). When the switch knob 5 and the lead-out portion of the power cord 37 from the main body case 1 are arranged so as to be on the opposite sides of the main body case 1 as described above, the thumb is applied to the switch knob 5 side. As a result, not only can the switching operation of the switch knob 5 be smoothly performed at any time during use, but also the power cord 37 is located outside the hand and does not get in the way.

As shown in FIGS. 1 and 4, an attachment 7 is detachably attached to the air outlet 2. As the attachment 7, for example, a large number of bristles 7b are provided in a circular shape on the outer surface of a disk-shaped base 7a, and a plurality of blowout small holes 7c penetrating the base 7a are provided in the central portion and the inner surface thereof is provided. The provided step portion 7d can be inserted into and removed from the inner peripheral surface of the air outlet 2. Attachment 7
Other than that, although not shown, a comb, a nozzle or the like is used.

In the hair dryer thus constructed, a normally closed type safety switch 40 is provided at the front end of the main body case 1, as shown in FIGS. Specifically, the safety switch 40 has a switch button 41, and one or two or more switch buttons 41 are provided so as to be retractable in the circumferential direction on the front outer surface of the rear flange 16 of the inner cylinder 10. In FIG. 6, the safety switch 40 has a normally closed contact 42 and a diode 43 provided in parallel, and is interposed in series between the heater 3 and the second switch 36 in the heater circuit. In the normal state where the switch button 41 projects forward, the contact 42 is closed so that commercial AC current flows to the heater 3. When an external force exceeding a predetermined pressure is applied to the switch button 41 and the switch button 41 sinks backward, the contact 42
Opens, and the commercial alternating current is half-wave rectified by the diode 43 to reduce the supplied power by half.

When the hot air is blown from the outlet 2 without using the attachment 7 and is used, when the outlet 2 comes too close to the hair and the switch button 41 is pressed by the hair and is immersed, the contact 42 opens. The electric power supplied to the heater 3 is reduced by half. Since the amount of heat generated by the heater 3 is reduced accordingly, the hair is not exposed to an excessively high temperature and is not damaged by the heat. The user notices that the air outlet 2 is too close to the hair because the switch button 41 touches the hair or the temperature of the warm air is lowered, and the air outlet 2 is moved away from the hair. Then, the switch button 41 returns to its original position, the contact 42 is closed, and the heater 3 is again supplied with a predetermined electric power, and hot air having a predetermined temperature is blown out from the outlet 2.

When the outlet 2 is placed face down on a wash basin or the like, the switch button 41 of the safety switch 40 is depressed by the weight of the hair dryer itself to open the contact 42, as shown in FIG. Also in this case, the amount of electricity supplied to the heater 3 is halved and the amount of heat generated is reduced as in the above case. Therefore, even if the air outlet 2 is blocked by the upper surface 44 such as a wash basin, the temperature inside the main body case 1 does not rise excessively, and thermal damage to the interior parts can be prevented. Further, since the upper surface 44 facing the outlet 2 is not exposed to high heat, it is safe because it is not damaged by heat.

(Other Embodiments) The safety switch 40 may be one that completely shuts off the power supply to the heater 3 or one that completely shuts off the power supply to both the heater 3 and the blower 4. Good. In the above embodiment, the effect can be further enhanced by applying the main body case 1 itself to a compact one that can be held by the palm as a hair dryer, but in addition to this, a pistol type hair dryer for attaching a grip to the main body case 1 The same can be applied to.

[Brief description of drawings]

FIG. 1 is a vertical side view of a hair dryer.

FIG. 2 is a side view showing the hair dryer in a semi-cut state.

FIG. 3 is a cross-sectional view of a hair dryer.

FIG. 4 is an exploded perspective view of a hair dryer.

FIG. 5 is a side view showing a state in which the hair dryer is placed on a washbasin or the like, with a part thereof broken away.

FIG. 6 is a circuit diagram of a hair dryer.

FIG. 7 is a perspective view showing a gripped state of a hair dryer.

[Explanation of symbols]

 1 Main unit case 2 Air outlet 3 Heater 4 Blower 40 Safety switch

Claims (1)

[Claims] 1. A blower outlet 2 is provided at a front end of a main body case 1 having a heater 3 and a blower part 4 built therein, and a normally-closed safety switch 40 that can be retracted and retracted forward is provided at the front end of the main body case 1. A hair dryer characterized in that the safety switch 40 is provided on the power supply unit 3 to cut off the power supply to the heater 3 or the air supply unit 4 at least in the heater 3 or reduce the power supply amount by the immersion operation.