JPH038162Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a hair dryer in which a discharge tube is extended to accommodate a heater block, and a cover is fitted over the discharge tube at a certain distance.

[Background technology]

In the conventional hair dryer A' (Japanese Utility Model Publication No. 56-151005), a surrounding frame 35 is fitted over the heater block 2' as shown in FIG.
Since the tip of the discharge tube 1' was fitted into the rear end opening of the discharge tube 1' and assembled into the cover 4', not only did it take a considerable amount of time to assemble it, but also the outer circumferential surface of the enclosure frame 35 and the inner circumference of the cover 4' The surfaces are in close contact with each other, so if the cover 4' bends due to impact such as falling, the enclosure frame 3
5 is also deformed and the heater block 2' is damaged, and the heat of the heater block 2' is conducted to the cover 4', causing the cover 4' to become hot and difficult to use.

[Purpose of invention]

The object of the present invention is to provide a hair dryer that is easy to assemble, and that does not cause damage to the heater block even if subjected to impact due to dropping or the like, and does not cause the cover to heat up and become difficult to use. .

[Disclosure of invention]

(Structure) In the hair dryer of the present invention, the rear end edge of the discharge cylinder 1 is extended rearward to form an extension part 1a, and within the extension part 1a of the discharge cylinder 1, a predetermined interval is placed on the outer peripheral surface. By accommodating the heater block 2 provided with a plurality of elastic protrusions 7, the elastic contact protrusions 7 are made to come into elastic contact with the inner surface of the extending part 1a of the discharge cylinder 1, and the connection between the heater block 2 and the extending part 1a of the discharge cylinder 1 is made. A gap 39 is formed between them, an engagement groove 3 is provided on the outer peripheral surface of the rear end of the discharge cylinder 1, and an engagement protrusion 5 is provided on the inner peripheral surface of the cylindrical cover 4, so that the cover 4 is connected to the discharge cylinder 1. The cover 4 is fitted into the engagement groove 3 to fit and lock the engagement protrusion 5 into the engagement groove 3, and a small gap 6 is formed between the cover 4 and the extending portion 1a of the discharge cylinder 1. The configuration achieves the above objective.

(Function) Even if the cover 4 is accidentally dropped and a shock is applied to it, the elastic protrusion 7, the gap 39, and the small gap 6 act as a cushion to cushion the shock and prevent the heater block 2 from being damaged. Furthermore, the heat of the heater block 2 is not directly conducted to the cover 2 due to the gap 39 and the small gap 6, so that heat insulation can be ensured.

(Example) Reference numeral 1 denotes a cylindrical discharge tube, and a rear end opening edge thereof extends rearward to provide an extension portion 1a. A heater block 2 is housed within the extending portion 1a of the discharge cylinder 1. As shown in FIG. 5, the heater block 5 has a cylindrical heater holder 8 in which a rubber insulating ring 9 having a plurality of dowel-like elastic protrusions 7 on the outer periphery is fitted, and the elastic protrusions 7 are formed on the outer periphery of the heater holder 8. The two PTC elements 14 and the washer 15 are inserted into the insulating ring 9 in order with the corrugated washers 11, the washer 12, and the terminal plate 13 sandwiched between the two PTC elements 14 and the washer 15, which protrude from the provided hole 10. Dowel 1
6, and this insulating ring 9 is supported by a plurality of claws 36 that project rearward and inward from the rear end opening edge of the heater holder 8. Therefore, the elastic protrusion 7 of the heater block 2 is in elastic contact with the inner peripheral surface of the extending portion 1a of the discharge cylinder 1, and the elastic protrusion 7 creates a space between the heater block 2 and the extending portion 1a of the discharge cylinder 1. A gap 39 is formed, improving heat insulation, insulation and impact resistance.
In addition, since the heater holder 8 is directly cooled by air, it exhibits a heat insulating effect, and along with this, the PTC
Since the resistance of the element 14 is also reduced, it is possible to increase the wattage. Four rows of inverted L-shaped engagement grooves 3 are provided at regular intervals (90°) in a direction perpendicular to the circumferential direction on the outer circumferential surface of the rear part of the discharge cylinder 1, that is, on the outer circumferential surface of the extending portion 1a. There is. Straight portion 3a of this engagement groove 3
The lower end extends to the opening edge of the extending portion 1a, and the upper lateral portion 3b is located at the extending base of the extending portion 1a. Reference numeral 4 denotes a cylindrical metal cover, which has four engaging protrusions 5 projecting inwardly provided at regular intervals (90 degrees) on its inner circumferential surface, that is, on the edge of the opening at the tip. The engagement protrusion 5 at the opening at the tip of the cover 4 is fitted into the straight part 3a of the engagement groove 3, slid forward, rotated to the left, and fitted into the upper lateral part 3b, so that the cover 4 is covered with the discharge cylinder 1. It's fitted. Therefore cover 4
The engagement protrusion 5 is engaged with the upper lateral part 3b of the engagement groove 3,
The cover 4 will not come off from the discharge cylinder 1. The inner diameter of the cover 4 is made smaller as it goes from the rear end to the tip, and the inner diameter of the tip is the same as that of the extending portion 1a of the discharge cylinder 1.
Since the outer diameter is equal to the outer diameter of the cover 4, a small gap 6 is formed between the inner circumferential surface of the cover 4 and the outer circumferential surface of the extending portion 1a of the discharge cylinder 1. This small gap 6 provides heat insulation and impact resistance. A flange portion 17 protruding outward is provided at the rear end opening of the cover 4, and the flange portion 17 is connected to the housing 18.
The cover 4 is fitted into the housing 18 by fitting into a locking groove 19 provided at the tip of the inner circumferential surface of the cover 4 . A partial pressure resistance block 20 is arranged inside the cover 4 at the rear of the heater block 2, and behind it a rectifying blade 22 housing a motor 21 is arranged. lower horizontal piece 23a,
A projecting piece 25 extending rearward from the rear end opening edge of the extending portion 1a of the discharge cylinder 1 is sandwiched between support pieces 24, 24 provided at the tip end side of the discharge cylinder 1.
It prevents rotation. A fan 26 rotated by a motor 21 is disposed inside the housing 18, and the opening at the rear end of the housing 18 is shaped like a bell mouth in order to increase suction efficiency. Fitting groove 2
9 and fixed. This housing 1
The lower end of 8 is rotatably attached to the howdle 37. In the hair dryer A configured as described above, by driving the motor 21 and rotating the fan 26, air is drawn from the suction tube 27 through the dustproof net 30, rectified by the rectifying blades 22, and is hot-aired in the heater block 2. The hot air can be sent to the discharge port 38 at the tip of the discharge tube 1 to blow hot air onto the hair. 31 in the figure is a switching button, 3
2 is a switch, 33 is a switch button, and 34 is a lead wire. In the present invention, the inner diameter of the cover 4 is made larger than the outer diameter of the discharge cylinder 1, and the height of the engagement protrusion 5 is made higher than the depth of the engagement groove 3. A small gap 6 may be formed between the two.

[Effect of idea]

In the present invention, since the heater block is housed in the extended portion formed by extending the rear end edge of the discharge tube rearward, there is no need for a frame surrounding the heater block as in the conventional case, and the heater block can be easily and easily installed. In addition, the elastic protrusion on the outer peripheral surface of the heater block is brought into elastic contact with the inner surface of the extending part of the discharge cylinder to form a gap between the heater block and the extended part of the discharge cylinder, and the discharge cylinder is assembled. An engagement groove is provided on the outer peripheral surface of the rear end, an engagement protrusion is provided on the inner circumference of the cylindrical cover, and the cover is fitted onto the discharge tube, and the engagement protrusion is fitted into the engagement groove. Since the cover is locked and a small gap is formed between the cover and the extension of the discharge cylinder, even if the cover is accidentally dropped and a shock is applied, the elastic protrusion, gap, and small gap will act as a cushion. However, it can prevent damage to the heater block by alleviating the impact, and it is also easy to use because the gaps and small gaps ensure insulation, and the heat from the heater block is not directly conducted to the cover. It is something. That is, according to the present invention, it has "excellent assembly, impact resistance, and heat resistance,
We can provide products such as "easy-to-use hair dryers."

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional example, Fig. 2 is a sectional view showing an embodiment of the present invention, Fig. 3 is an exploded perspective view of the same, and Fig. 4 a, b, and c are B of Fig. 2. A view in the direction of the arrow C in FIG. 3, a view in the direction of the D in FIG. 3, FIG. 5 is an exploded perspective view of the heater block in the above,
The figure is a sectional view taken along the line XX in FIG. 2. DESCRIPTION OF SYMBOLS 1...Discharge tube, 1a...Extension part, 2...Heater block, 3...Engagement groove, 4...Cover, 5...
Engagement protrusion, 6...Small gap, 7...Elastic protrusion, 39
……gap.

Claims (1)

[Scope of utility model registration request] By extending the rear end edge of the discharge cylinder rearward to form an extension part, and accommodating a heater block in which a plurality of elastic protrusions are provided on the outer peripheral surface at predetermined intervals in the extension part of the discharge cylinder. An elastic contact protrusion is brought into elastic contact with the inner surface of the extending part of the discharge cylinder to form a gap between the heater block and the extended part of the discharge cylinder, and an engagement groove is formed on the outer peripheral surface of the rear end of the discharge cylinder. an engaging protrusion is provided on the inner circumferential surface of the cylindrical cover, the cover is fitted onto the discharge cylinder, the engaging protrusion is fitted and locked in the engagement groove, and an extension of the cover and the discharge cylinder is provided. A hair dryer that forms a booth between the hair dryer and the hair dryer.