Hair dryer

Abstract

To provide a hair dryer which can quicken drying time by increasing a contact area of air with hair of a head.SOLUTION: A hair dryer 1 includes a body housing 2 having an intake port 21 and an air outlet port 22 on both end parts facing each other, a fan 4 which is used for blowing air and is arranged in the body housing 2, a motor 5 for driving the fan 4, and an air collection hood 6 for collecting the blowing air blowing out of the air outlet port 22. The air collection hood 6 includes an annular outer ring cylindrical part 13, a guide cylindrical part 15 in which a part is connected to an inner peripheral surface of the outer ring cylindrical part 13, an inner air outlet passage 14 which is provided in the guide cylindrical part 15 and is positioned in the center of the outer ring cylindrical part, and an outer air outlet passage 16 formed between the outer ring cylindrical part 13 and the guide cylindrical part 15.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a hair dryer. [Background technology]

[0002] Conventionally, there has been known a hair dryer that has a nozzle attached to the outlet of the main housing that has a built-in fan for blowing air, the nozzle communicating with the downstream end of the air passage, and the central part of the nozzle being a weak wind area from which air is not emitted, and multiple divided parts surrounding the weak wind area being strong wind areas from which air is directly emitted (see, for example, Patent Document 1).

[0003] Furthermore, the hair dryer described in Patent Document 1 generates a so-called "point strong wind" with a clear difference in wind speed and pressure between the weak wind area in the center of the nozzle and the strong wind area on either side of it, making it possible to easily and effectively shorten drying time. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4420059 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the hair dryer described in Patent Document 1, although a "point strong wind" with a difference in wind speed between the weak wind area and the strong wind area is generated, such a "point strong wind" is only ejected in front of the strong wind area, so there is room for improvement from the perspective of shortening the drying time.

[0006] The present invention has been made in view of the above circumstances, and its object is to provide a hair dryer that can increase the contact area of ​​the airflow with the hair, thereby shortening the drying time. [Means for solving the problem]

[0007] In order to achieve the above object, one aspect of the present invention is a hair dryer comprising: a main housing having an air intake and an air outlet at opposite ends; a blower fan disposed within the main housing; a motor for driving the fan; and an air collection hood for collecting the air blown out from the air outlet, wherein the air collection hood has an annular outer ring tube portion, an induction tube portion part of which is connected to the inner peripheral surface of the outer ring tube portion, an inner air outlet passage provided in the induction tube portion and located at the center of the outer ring tube portion, and an outer air outlet passage defined between the outer ring tube portion and the induction tube portion. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a hair dryer that can increase the contact area of ​​airflow with hair and shorten the drying time. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of a hair dryer according to an embodiment of the present invention, seen from the front. [Figure 2] FIG. 2 is a perspective view of the hair dryer as seen from the rear. [Figure 3] FIG. 2 is a cross-sectional view of the hair dryer. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. [Figure 7] FIG. 10 is an explanatory diagram showing the flow of air discharged from the air collecting hood. [Figure 8] FIG. 10 is a front view of a wind collecting hood according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] FIG. 1 is a perspective view of a hair dryer 1 according to an embodiment as seen from the front, FIG. 2 is a perspective view of the hair dryer 1 as seen from the rear, and FIG.

[0012] As shown in Figures 1 to 3, the hair dryer 1 according to this embodiment mainly comprises a cylindrical main body housing 2, a handle portion 3 rotatably connected to the main body housing 2, a blower fan 4 arranged within the main body housing 2, a motor 5 that drives the fan 4, and an air collection hood 6 that collects the air blown out from the main body housing 2.

[0013] The main housing 2 has an air intake 21 and an air outlet 22 at both opposing ends. The air intake 21 is provided on the rear end side of the main housing 2, and air is drawn into the main housing 2 through the air intake 21. The inside of the air intake 21 is covered with a mesh filter 23, which makes it difficult for foreign matter such as dust and hair to get into the main housing 2.

[0014] The fan 4 and motor 5 constitute a blower 7 that outputs air drawn in through the air intake 21 as an air current toward the air outlet 22. The blower 7 is disposed on the central axis O (see FIG. 3) of the main body housing 2 with the fan 4 facing the air intake 21. A heater 8 is disposed inside the main body housing 2 to heat the air current generated by the blower 7 and turn it into warm air.

[0015] The handle 3 is provided with a push switch 9 for turning the power on and off, and a slide switch 10 for switching between hot and cold air modes. A circuit board 11 for a control circuit that controls the fan 4 and motor 5 is housed inside the handle 3, and electronic components such as switches and sensors are also mounted on this circuit board 11. A power cord 12 is connected to the circuit board 11, and this power cord 12 is led out from the bottom end of the handle 3 to the outside.

[0016] The handle 3 is rotatable clockwise and counterclockwise around a rotation axis perpendicular to the slide surface P. As a result, when the hair dryer 1 is in use, the handle 3 can be opened and extended in a direction substantially perpendicular to the main body housing 2, as shown in FIGS. 1 to 3. When the hair dryer 1 is not in use, the handle 3 can be folded in a state substantially parallel to the main body housing 2.

[0017] Next, the configuration of the wind collecting hood 6 will be described with reference to FIGS.

[0018] 4 is a perspective view of the wind collecting hood 6, FIG. 5 is a front view of the wind collecting hood 6, FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5, and FIG. 7 is an explanatory diagram showing the flow of air discharged from the wind collecting hood 6.

[0019] As shown in Figures 4 to 6, the air collecting hood 6 is a one-piece molded product made of synthetic resin material, and has an outer ring tubular portion 13, an induction tubular portion 15 in which an inner blowing passage 14 located at the center of the outer ring tubular portion 13 is formed, an outer blowing passage 16 defined between the induction tubular portion 15 and the outer ring tubular portion 13, and a plurality of induction plates 17 provided inside the outer blowing passage 16.

[0020] The wind collecting hood 6 is detachably attached to the front end of the main housing 2, and is connected to the air outlet 22 by snapping it onto the front end of the main housing 2. This allows air generated by the blower 7 to be discharged forward from the air outlet 22 through the wind collecting hood 6.

[0021] The outer annular cylinder portion 13 is a cylindrical portion with a circular opening at its front end, and its outer circumferential surface is curved so that it tapers gently toward the front. The guide cylinder portion 15 is provided inside the outer annular cylinder portion 13 and has a roughly triangular outer shape in a front view. The guide cylinder portion 15 has a roughly triangular inner outlet passage 14 formed in it that is similar in shape to the outer shape of the guide cylinder portion 15, and the center of the inner outlet passage 14 coincides with the central axis O of the main housing 2.

[0022] The three tops of the guide tube portion 15 are supported at equal intervals of 120 degrees on the inner circumferential surface of the outer annular tube portion 13. As a result, three outer discharge passages 16 are defined between the guide tube portion 15 and the outer annular tube portion 13 along the circumferential direction of the outer annular tube portion 13. The outer circumferential surface of the guide tube portion 15 is formed in an arc shape concave inward, and these outer discharge passages 16 are elliptical in front view. Here, if the opening area of ​​the inner discharge passage 14 is S1 and the opening area of ​​one outer discharge passage 16 is S2, the opening area S2 of the outer discharge passage 16 is set to be larger than the opening area S1 of the inner discharge passage 14 (S2 > S1).

[0023] A plurality of (e.g., three) guide plates 17 are arranged inside the outer blow-out passage 16, and these guide plates 17 are installed between the outer peripheral surface of the guide tube portion 15 and the inner peripheral surface of the outer annular tube portion 13. Here, the axial length of the guide tube portion 15 is set to be approximately equal to the entire axial length of the outer annular tube portion 13, but the length of the guide plate 17 is shorter than the entire length of the outer annular tube portion 13, and the guide plate 17 is installed at a recessed position within the outer blow-out passage 16. In other words, the guide plate 17 is installed between the outer peripheral surface of the guide tube portion 15 and the inner peripheral surface of the outer annular tube portion 13, at a position spaced inward from the tip of the guide tube portion 15. Note that the guide plate 17 is arranged parallel to an imaginary plane extending radially from the central axis of the wind collecting hood 6, but it may be arranged so as to be inclined with respect to the imaginary plane.

[0024] In a hair dryer 1 equipped with the air collecting hood 6, more air is output near the center of the air outlet 22 than at outer positions away from the center. Furthermore, because the opening area S2 of the outer air outlet passages 16 formed around the inner air outlet passage 14 is larger than the opening area S1 of the inner air outlet passage 14 formed in the center of the air collecting hood 6, the wind speed of the air passing through the inner air outlet passage 14 is faster and the wind speed of the air passing through the outer air outlet passage 16 is slower.

[0025] 7, of the air generated by blower 7 and heading toward outlet 22, the air near the center travels straight through inner outlet passage 14 at high speed (see arrow W1), while the air at the periphery passes through outer outlet passage 16 and spreads in the diffusion direction (see arrow W2). As a result, a vortex ring is generated by the difference in speed between the air passing through inner outlet passage 14 and outer outlet passage 16, which can create turbulence, increasing the contact area of ​​the air with the user's hair and effectively shortening the drying time.

[0026] Furthermore, the guide plate 17 arranged in the outer blow-out passage 16 is positioned inwardly away from the tip of the guide tube section 15, and a large space is secured between the tip of the guide plate 17 and the tip of the guide tube section 15, so that the air passing through the outer blow-out passage 16 is easily diffused in front of the guide plate 17, and turbulence can be generated more effectively.

[0027] As described above, the hair dryer 1 according to this embodiment can achieve the following effects.

[0028] The air collecting hood 6 attached to the air outlet 22 of the main body housing 2 comprises an annular outer ring cylinder portion 13, an induction cylinder portion 15 partially connected to the inner circumferential surface of the outer ring cylinder portion 13, an inner air outlet passage 14 provided in the induction cylinder portion 15 and located at the center of the outer ring cylinder portion 13, and an outer air outlet passage 16 defined between the outer ring cylinder portion 13 and the induction cylinder portion 15. A vortex ring is created by the difference in speed between the air discharged at high speed in a straight line through the central inner air outlet passage 14 and the air discharged while passing through the surrounding outer air outlet passage 16 and expanding in the diffusion direction, and this vortex ring expands the range of the air blown out from the air collecting hood 6. As a result, the contact area of ​​the air with the user's hair increases, effectively shortening the drying time.

[0029] Furthermore, since each apex of the guide tube portion 15, which has an approximately triangular outer shape, is supported by the inner surface of the outer ring tube portion 13, an outer blow-out passage 16 divided into three is defined between the outer ring tube portion 13 and the guide tube portion 15, and therefore multiple outer blow-out passages 16 with large opening areas can be arranged around the inner blow-out passage 14.

[0030] Furthermore, since the opening area S2 of each of the outer outlet passages 16 is set larger than the opening area S1 of the inner outlet passage 14, the wind speed of the air passing through the inner outlet passage 14 is high and the wind speed of the air passing through the outer outlet passage 16 is low, thereby increasing the speed difference between the two and favorably generating a vortex ring.

[0031] In addition, the outer peripheral surface of the guide tube portion 15 is formed in an arc shape that is concave inward, and an elliptical outer blow-out passage 16 is defined between the inner peripheral surface of the outer ring tube portion 13 and the outer peripheral surface of the guide tube portion 15, so that the opening area S1 of the outer blow-out passage 16 can be increased.

[0032] In addition, in the hair dryer 1 according to this embodiment, a guide plate 17 is arranged inside the outer blowing passage 16, spanning between the outer peripheral surface of the guide tube portion 15 and the inner peripheral surface of the outer ring tube portion 13, and therefore the guide plate 17 can increase the mechanical strength of the air collecting hood 6.

[0033] The axial length of the guide tube portion 15 is approximately the same as the overall length of the outer ring tube portion 13, but the length of the guide plate 17 is shorter than the overall length of the outer ring tube portion 13, and the guide plate 17 is positioned at a recessed position within the outer blow-out passage 16, so that the air passing through the outer blow-out passage 16 is more likely to diffuse in front of the guide plate 17, thereby generating turbulence more effectively.

[0034] In this embodiment, the guide tube portion 15 has a uniform thickness along the direction of the airflow, but the cross-sectional shape of the guide tube portion 15 may be a wing-like cross-sectional shape in which the outer peripheral surface of the portion connecting with the guide plate 17 bulges out. In this way, the speed difference between the air passing through the inner outlet passage 14 and the air passing through the outer outlet passage 16 can be made larger.

[0035] Next, a modified example of the wind collecting hood 6 will be described.

[0036] 8 is a front view of a modified wind collecting hood 6. In the modified wind collecting hood 6, the guide tube portion 15 has a substantially diamond-shaped outer shape, and the four apexes of the guide tube portion 15 are supported by the inner circumferential surface of the outer ring tube portion 13. This defines an outer blow-out passage 16 divided into four sections between the outer ring tube portion 13 and the guide tube portion 15. The inner blow-out passage 14 also has a diamond shape similar to the outer shape of the guide tube portion 15, and the opening area of ​​each of the four divided outer blow-out passages 16 is larger than the opening area of ​​the inner blow-out passage 14.

[0037] The air collecting hood 6 according to the modified example configured in this manner can also achieve the same effects as the hair dryer 1 according to the embodiment described above. The shape of the guide tube portion 15 is not limited to the substantially triangular shape of the above embodiment or the substantially rhombic shape of Modification 1, and may be another polygonal shape (for example, a pentagonal shape) in which each apex is supported by the inner circumferential surface of the guide tube portion 15.

[0038] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present invention. The present invention covers all technical matters included in the technical ideas described in the claims. The above-described embodiments are preferred examples, but a person skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed in this specification, and these are included in the technical scope described in the appended claims.

[0039] For example, in the wind collecting hoods 6 according to the above-described embodiment and modified examples, the inner outlet passages 14 are formed in a shape similar to the outer shape of the guide tube portion 15, but it is also possible to form inner outlet passages 14 that are dissimilar to the outer shape of the guide tube portion 15. That is, it is also possible to form inner outlet passages 14 that are circular, rectangular, or the like in a guide tube portion 15 that has a triangular outer shape, or to form inner outlet passages 14 that are circular, triangular, or the like in a guide tube portion 15 that has a diamond-shaped outer shape.

[0040] Furthermore, in the above embodiment, the wind collecting hood 6 is a separate member that can be attached to and detached from the main body housing 2, but the wind collecting hood 6 may be provided integrally with the main body housing. [Explanation of symbols]

[0041] 1 hair dryer 2 Main body housing 3 Handle 4 Fans 5 motors 6. Wind-collecting hood 7. Blower 13 Outer ring cylinder part 14 Inner air outlet passage 15 Guide cylinder part 16 Outside air outlet passage 17 Guidance plate 21 Air intake 22 Air outlet

Claims

1. a main body housing having an intake port and an outlet port at opposite ends; a blower fan disposed within the main body housing; a motor that drives the fan; a wind collecting hood that collects the air blown out from the air outlet, The wind collecting hood includes an annular outer ring cylinder portion, an induction cylinder portion partly connected to the inner peripheral surface of the outer ring cylinder portion, an inner blow-out passage provided in the induction cylinder portion and positioned at the center of the outer ring cylinder portion, and an outer blow-out passage defined between the outer ring cylinder portion and the induction cylinder portion. A hair dryer comprising:

2. The hair dryer according to claim 1, the guide tube portion is connected to a plurality of points on the inner circumferential surface of the outer ring tube portion, The outer outlet passage is divided into a plurality of sections along the circumferential direction of the outer annular cylindrical portion. A hair dryer characterized by:

3. 3. The hair dryer according to claim 2, an opening area of ​​each of the plurality of divided outer air outlet passages is set larger than an opening area of ​​the inner air outlet passage; A hair dryer characterized by:

4. The hair dryer according to claim 2 or 3, The outer peripheral surface of the guide tube portion is formed in an arc shape concave inward. A hair dryer characterized by:

5. 3. The hair dryer according to claim 2, A guide plate is provided between the outer peripheral surface of the guide tube portion and the inner peripheral surface of the outer ring tube portion. A hair dryer characterized by:

6. The hair dryer according to claim 5, The axial length of the guide tube portion is set to be approximately equal to the overall axial length of the outer annular tube portion, The guide plate is provided between the outer peripheral surface of the guide barrel portion and the inner peripheral surface of the outer ring barrel portion at a position spaced inward from the tip of the guide barrel portion. A hair dryer characterized by:

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