JPS6198206A - Hair dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Technical field〕 This invention relates to a hair dryer.

[Background technology]

Conventionally, the blowing mechanism used in cylindrical hair dryers is a turbo fan (mixed flow fan), as shown in Figure 7.
41 is driven by a motor 42, and a housing 43 forms a wind cylinder (Japanese Utility Model Publication No. 59-20163, Japanese Utility Model Publication No. 58710491), 45 is a filter;
46 is a rectifying blade, 47 is a suction ring, and 4B is a rear wall. The rear wall 48 is formed at the tip of the suction port ring 47 by rising up from the inner surface of the housing 43 at a right angle.

However, the air sucked in by the fan 41 flows backwards as shown by the arrow and hits the rear wall 48, and furthermore the air inlet ring 4
It escapes to the 7 side, collides with the inhaled wind, disrupts the wind flow, and prevents inhalation. Further, at the rear of the fan 41, this phenomenon creates a spiral flow Q, producing wind noise.

[Purpose of the invention]

This invention improves the blowing force generated by the fan.
To provide a hair dryer that can efficiently generate wind and has little noise.

[Disclosure of the invention]

The hair dryer of the present invention has a suction port ring placed opposite to the rear of the fan, and an annular rear wall that closes the gap between the inner circumferential surface of a housing housing the fan and the outer circumferential surface of the suction port ring. The distance between the fan and the outer peripheral end of the rear wall is greater than the distance between the fan and the fan-side end of the suction port ring.

In this way, since the outer peripheral portion of the rear wall is set back from the suction port ring, the wind generated from the fan is prevented from flowing backward and returning to the suction port ring side.

Therefore, wind generation efficiency is improved and noise is reduced.

Embodiment In FIG. 0, an embodiment of the present invention is shown in FIGS. 1 to 5. In FIG.
, the front end is connected to the outlet 3 (Fig. 2), f
lu″T′″″″″0ゝ-”(D＊'lAt゛'y9v
The fan 5 attached to the output shaft of the motor 4 is housed in the housing l near the suction port 2. A filter cover 6, a suction port ring 7, and a cord connector 8 are disposed at the motor 4. A rectifying blade 9 is protruded from the outer periphery of the motor 4, and the rectifying blade 9 allows the housing l The suction port ring 7 is formed into a bell mouth shape consisting of a tapered portion 7a whose diameter is reduced toward the fan 5 side, and two straight portions 7b. 7b, an annular rear wall 10 closes the space between the outer circumferential surface of the suction port ring 7 and the inner circumferential surface of the housing 1. Therefore, the rear wall 10 is connected to the fan 5 side of the suction port ring 7. It is set back from the fan 5 with a step from the end.The rear wall IO is formed integrally with the inlet ring 7 and fixed to the annular rib 11 of the housing 1; A face wall IO may also be formed.

A heater block 12 and a base 13 are disposed in a portion of the housing 1 closer to the discharge port 3 than the fan 5 is. As shown in FIG. 3, the heater block 13 is housed in a cylindrical heater surrounding frame 14, and a lead frame 15 is attached to the heater surrounding frame 14.
A cord connector 8 is connected via a connector plate 17 to a lead plate 16 that projects through the lead plate 16 . 18 is a sub-lead frame, and 20 is a fixing ring. Lead plate 1
6 is a lead plate fitting 1j provided on the inner peripheral surface of the housing l.
i21 and the lead plate insertion notch 22 (FIG. 5) provided in the rib 11 of the housing l. The rear wall 10 provided integrally with the suction port ring 7 has a rib 1 of the housing l.
A pressing protrusion 23 is formed to fit into the lead plate insertion notch 22 of No. 1, and the suction port ring 7 also has the function of pressing and holding the lead plate 16. Further, a lead plate insertion notch 24 (FIG. 3) is formed in the tapered cylindrical portion 7a of the suction port ring 7.

At the front end of the housing 1, as shown in FIG.
are integrally formed with a fixing rib 27 interposed therebetween, and a base 13 for fitting an attachment such as an accent ring 28 is fitted onto the small diameter cylindrical portion 26.

Further, the front end of the heater surrounding frame 14 is sucked into the small diameter cylindrical portion 26 . The heater surrounding frame 14 is formed into a tapered cylindrical shape that gradually narrows toward the front end, and an annular printed circuit board 29 is disposed between the outer circumference of the heater surrounding frame 14 and the inner circumferential surface of the housing 1 . A rectifier 30 and the like used for the motor 4 and heater block 9 are mounted on the printed circuit board 29.

The cap 13 is externally repaired to the small-diameter cylindrical portion 26 (FIG. 4) of the housing l, but at that time, the 'I!' of the cap 13 is repaired. 831 is fitted into the fixing rib 27 of the housing l. The accent ring 2 fits onto the outer periphery of the cap 13, presses the flange 13a of the cap 13 with the cap presser piece 28a of the accent ring 13, and at the same time presses the fixing claw 32 and the fixing groove 33 of the fixing rib 27 of the housing 1. engage. With these three parts,
Ensure fixation in radial and thrust directions. In addition, the push button support iJ of accent ring 28! A push button 35 (FIG. 2) is inserted into 34 and held between push button support parts 36 of the housing l.The push button 35 has a built-in spring 37 (FIG. 2).

The air sucked in from the suction port 2 by the rotation of the operating fan 5 is discharged from the discharge port 3 through the heater block 9. At this time, the rear wall lO of the outer periphery of the suction port ring 7
Since it is set back from the side end of the fan 5, it is possible to prevent the wind generated from the fan 5 from flowing backward into the suction port ring 7. Therefore, there is no resistance due to the generation of vortices, etc., improving the efficiency of wind generation and reducing noise. Therefore, the load on the motor 4 is reduced and the dryer has a long service life, and there is no discomfort during use, making the dryer easy to use.

In addition, since the heater surrounding frame 14 is provided and electronic components such as the printed circuit board 29 are arranged in the space between the heater surrounding frame 14 and the housing 1, there are no circuit components in the ventilation path, and the Insulation failures due to foreign matter contamination and short circuits of circuit components can be prevented, making it possible to provide a safe and reliable dryer.

Furthermore, when attaching the accent ring 28, etc., the structure
It has a mating structure as described above with the diagram.
Therefore, it is easier to assemble than the conventional screw-fixed type.

FIG. 7 shows another embodiment, in which the suction ring 7
The rear wall 10' on the outer periphery of the suction ring 7' is an inclined wall that is gradually retreated toward the outer periphery from the front end of the suction port ring 7'. In this case as well, the fan's air intake ring 7
The effect of preventing return to the ′ side can be obtained.

〔Effect of the invention〕

The hair dryer of the present invention has the effect of improving the blowing force generated by the fan and efficiently generating wind.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of an embodiment of the present invention, FIG. 2 is a cross-sectional view of the entire structure, FIG. 3 is an exploded perspective view of the same, and FIG.
The figures are the same (an exploded perspective view of the accent ring attachment part, Figure 5 is an exploded perspective view of the lead plate insertion part seen from the front, Figure 6 is a partial sectional view of another embodiment, and Figure 7 is the conventional It is a partial sectional view of an example.]...Housing, 2...Suction port, 3...Discharge port, 4 fathoms...Motor, 5...Fan, 7, 7'...Suction port Ring, 10.10' Rear wall Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 6

Claims (2)

[Claims] (1) A suction port ring is arranged opposite to the rear of the fan, and an annular rear wall is provided to close between the inner circumferential surface of the housing housing the fan and the outer circumferential surface of the suction port ring, and the fan and the suction port A hair dryer in which the distance between the fan and the outer peripheral end of the rear wall is greater than the distance between the fan side end of the mouth ring. (2) A patent in which the suction port ring is composed of a tapered portion whose diameter decreases toward the fan and a straight cylindrical portion extending from the small diameter end of the tapered portion, and the boundary portion between the tapered portion and the straight cylindrical portion is supported by the rear wall. A hair dryer according to claim (1).