Hair styling appliance with air deflection bend

Abstract

A hair styling device comprising: - a columnar body having a distal side and a proximal side constituting a handle; - an axial air inlet opening on the proximal side of the columnar body; - a radial air outlet opening on the distal side of the columnar body; - a turbine located in the columnar body and in use driven in rotation by a motor, so as to be able to draw in air through the air inlet opening and expel it through the air outlet opening; - a deflection bend located in the columnar body for guiding air moving axially in the columnar body towards the radial air outlet opening, the deflection bend comprising an air inlet and an air outlet and at least two vanes for orienting the air flow; wherein each of the at least two vanes comprises a base arranged such that the air inlet of the deflection bend is divided into distinct passages, and wherein each of the vanes forks into at least two arms inside the deflection bend, so as to form a set of baffles at the air outlet of the deflection bend.

Description

Technical Field

[0001] This invention relates to a hair styling appliance, and more particularly to a stick-shaped hair dryer having an air outlet perpendicular to the longitudinal axis of the appliance. The invention further relates to such a stick-shaped hair dryer, wherein an air deflection bend is provided within the hair styling appliance to deflect air toward the outlet. Background Technology

[0002] The current trend is to change the design of traditional pistol-shaped hair dryers, making them more similar to the design of a hot air comb. The improved hair dryer has a long, cylindrical form with a distal and proximal side. The proximal side serves as a grip handle and includes an air inlet at its base, while the distal side is used to exhaust air through an outlet opening radially positioned on the cylindrical housing. Therefore, the airflow initially flows along an axial path within the hair dryer and is then deflected perpendicular to the axis of the cylindrical hair dryer. Consequently, a 90° bend is incorporated inside the cylindrical body to guide the airflow towards the outlet. This unique design combines the advantages of both hair dryers and hot air combs: excellent performance and ease of use. The cylindrical body also functions as a handle, making the hair dryer more ergonomic.

[0003] To create a uniform and efficient airflow across the entire air outlet, the geometry of the curved section in the blower is crucial. Various blades are incorporated into the curved section to improve air guidance.

[0004] Document CN114073368A discloses a cylindrical blower with a radial outlet, which includes an airflow reversing component with multiple fins to guide and change the direction of airflow. The reversing component also includes connecting rods that connect the different fins to each other, making the structure more stable and less prone to deformation. The fins are arranged at a certain spacing along the longitudinal axis.

[0005] Document WO2022089673A1 discloses a cylindrical blower with a radial outlet, which includes an air guide grille for changing the direction of airflow. The blades of the guide grille are arc-shaped and its air outlet is Y-shaped to narrow the outlet cross-section, thereby increasing the velocity and pressure of the airflow. Summary of the Invention

[0006] The purpose of this invention

[0007] The present invention aims to overcome the shortcomings of the prior art, and in particular aims to provide a rod-shaped hair styling tool including a deflecting bend that allows airflow generated in the longitudinal direction to be deflected in the radial direction and improves the airflow distribution at the air outlet.

[0008] This invention discloses a hair styling device, comprising: - A columnar body, including a distal side and a proximal side serving as a handle; - An axial air inlet opening is located on the proximal side of the cylindrical body; - A radial air outlet opening is located on the distal side of the columnar body; - A turbine, located in the cylindrical body, is driven to rotate by a motor during use, thereby drawing in air through an air inlet opening and expelling air through an air outlet opening; - A deflection bend, located in the columnar body, for guiding air moving axially within the columnar body toward a radial air outlet opening, the deflection bend including an inlet and an air outlet and at least two blades for orienting the airflow. Each of at least two blades includes a base arranged to divide the air inlet of the deflection bend into different channels, and each of the blades is bifurcated into at least two arms inside the deflection bend, thereby forming a set of baffles at the air outlet of the air deflection bend.

[0009] According to specific embodiments, the present invention includes one or more of the following features: - The bending angle of the first arm of each blade is greater than the bending angle of the second arm of each blade; - The columnar body includes an inner tube connected to the inlet of the deflection bend to deliver the axial airflow in the columnar body of the blower before it is deflected by the deflection bend, the inner tube forming an insulating layer of the blower's housing. - The cross-sectional area of ​​the air inlet opening is 180 cm². 2 Up to 300 cm 2 Between, and the cross-sectional area of ​​the air outlet opening is 200 cm². 2 Up to 500 cm 2 between; - The ratio of the distance between the air inlet opening and the air outlet opening to the total length of the columnar body is between 0.05 and 0.2; - The ratio of the diameter of the internal tube to the diameter of the columnar body is between 0.4 and 0.9; - The ratio between the length and diameter of the internal tube is between 3.5 and 6.5; - The ratio of the bending angle of the first arm to the bending angle of the second arm is between 0.35 and 0.7; - The baffles located in the air outlets are positioned in a staggered manner; - The deflection bend is a component consisting of two assembly parts, each of which corresponds to half of the deflection bend. The blade arms are at different heights for each part, thus forming a baffle in an alternating arrangement. - The cross-section of the device is elliptical. Attached Figure Description

[0010] Figure 1 A three-dimensional view of an example of a hair dryer according to the present invention is shown.

[0011] Figure 2 A three-dimensional view of the air deflection bend and the internal tube is shown, which are shown outside the housing of the hair dryer.

[0012] Figure 3A A view of the deflection bend relative to its air outlet is shown. Figure 3B A view of the deflection bend relative to its air inlet is shown.

[0013] Figure 4A and Figure 4B and Figure 3A and Figure 3B The same, and the inner blades are shown in dashed lines.

[0014] Figure 5 A side view of the deflection bend is shown, with the inner blades shown in dashed lines.

[0015] Figure 6A and Figure 6B The diagram shows a view of the left side of the deflector relative to the air outlet and air inlet of the deflector when the deflector is manufactured in two pieces.

[0016] Figure 7A and Figure 7B The diagram shows a view of the right side of the deflector relative to the air outlet and air inlet of the deflector when the deflector is manufactured in two pieces.

[0017] Figure 8A and Figure 8B A diagram showing the airflow velocity distribution in a curved section without internal blades in the prior art is presented. Figure 8A It is a 3D view of the outlet of the hair dryer, and Figure 8B This is a two-dimensional diagram of the outlet of a hair dryer.

[0018] Figure 9A and Figure 9B A diagram showing the airflow velocity distribution of a curved section with three continuous internal blades in the prior art is presented. These three continuous internal blades do not branch into two arms, and their curvature remains parallel to the outer surface of the curved section. Figure 9A It is a 3D view of the outlet of the hair dryer, and Figure 9B This is a two-dimensional diagram of the outlet of a hair dryer.

[0019] Figure 10A and Figure 10B As shown Figures 1 to 7B The diagram shows an example of an airflow velocity distribution of a curved section according to the invention, which has two internal blades, each of which includes two arms with different curvatures. Figure 10A It is a 3D view of the outlet of the hair dryer, and Figure 10B This is a two-dimensional diagram of the outlet of a hair dryer.

[0020] Reference number list

[0021] 1: Hair dryer

[0022] 2: The cylindrical body of the hair dryer

[0023] 3: Air inlet opening at the bottom of the proximal portion of the columnar body.

[0024] 4: Air outlet opening in the outer shell at the distal end of the columnar body.

[0025] 5: Deflection and bending section

[0026] 51: Inlet of the deflection bend

[0027] 52: Exit of the deflection bend

[0028] 6: Internal pipe

[0029] 7: Blades at the deflection bend

[0030] 8: Inlet channel of the deflection bend

[0031] 9: Air outlet baffle at the deflection bend

[0032] 10: The first arm of the blade

[0033] 11: The second arm of the blade

[0034] 12: Base of the leaf

[0035] 13: The near end of the hair dryer

[0036] 14: The far end of the hair dryer Detailed Implementation

[0037] According to the present invention, the rod-shaped hair dryer 1 is in Figure 1As shown in the figure, it includes a cylindrical body 2, also referred to as a "tubular housing," having a proximal side 13 serving as a gripping handle and a distal side 14 for air discharge. Air is circulated through the blower by entering through an air inlet opening 3 located at the bottom of the proximal side of the cylindrical body and exiting through an air outlet opening 4 located radially on the housing of the distal side of the cylindrical body. A turbine (not shown) is located in the cylindrical body and is driven to rotate by a motor (not shown), thereby enabling air to be drawn in through the air inlet opening and discharged through the air outlet opening. Preferably, the cross-sectional area of ​​the air inlet opening is 180 cm². 2 Up to 300 cm 2 Between, while the cross-sectional area of ​​the air outlet opening is 200 cm². 2 Up to 500 cm 2 The ratio between the distance between the two air openings and the total length of the columnar body is preferably between 0.05 and 0.2, and this distance is measured along the axis of the blower. This distance between the inlet and outlet of the air openings is preferably between 25 mm and 60 mm, more preferably between 35 mm and 50 mm. The total length of the columnar body can be between 250 mm and 350 mm.

[0038] The hair dryer of the present invention includes a deflection bend 5 located upstream of the air outlet opening, such that axially entering airflow is deflected toward the air outlet opening located radially on the outer casing of a cylindrical body. An internal tube 6 may be provided inside the cylindrical body to deliver the axial airflow within the cylindrical body of the hair dryer before it is deflected by the bend. Figure 2 As shown, the inner tube connects to the air inlet of the deflection bend. This inner tube also provides thermal insulation. The motor, turbine, and heating resistor are located inside the tube, thereby isolating the core of the cylindrical body from the outer casing held by the user. The ratio of the inner tube's diameter to the cylindrical body's diameter is preferably between 0.4 and 0.9. This creates a gap between the two walls to thermally insulate the hair dryer's outer casing. Preferably, the inner tube's diameter is between 25 mm and 50 mm, more preferably between 30 mm and 40 mm. Preferably, the cylindrical body has an elliptical cross-section. The ratio of the inner tube's length to its diameter is preferably between 3.5 and 6.5. Preferably, the inner tube's length is between 150 mm and 200 mm.

[0039] Figures 3A to 7B The deflection bend is shown in detail, which includes blades 7 for guiding airflow so that the airflow is as uniform as possible when it leaves the blower.

[0040] More specifically, the bend includes an inlet 51 and an outlet 52. At least two blades are disposed in the bend, and these at least two blades extend between the inlet and outlet of the bend. Each blade includes a base 12 located in the inlet of the bend and two arms 10, 11 extending to the outlet of the bend. Thus, the base of each blade gradually branches into two arms between the inlet and outlet of the bend.

[0041] In this way, such as Figure 3B and Figure 4B As shown, the inlet is divided into multiple air inlet channels 8. In this example, two blades are shown, thereby forming three air inlet channels. These channels are sub-regions of the inlet surface of the bend, thus forming multiple individual and distinct inlet surfaces. Preferably, each surface is 60 mm in diameter. 2 Up to 100 mm 2 between.

[0042] Each blade has a first arm 10 and a second arm 11. At the outlet, both arms of each blade block the outlet to form a set of baffles 9. Given the presence of two blades, four baffles are shown in the exemplary figures. To form the baffles, the two arms of the same blade have different bending angles. In this way, the first arm of the blade will be located at a first height in the outlet of the bend, and the second arm of the blade will be located at a second height in the outlet of the bend. Preferably, the first blade forms a first baffle integral with a first lateral side of the outlet of the bend, and a second baffle integral with another lateral side of the outlet of the bend. In this case, the two baffles of the same blade are positioned relative to each other in an alternating manner at the outlet of the bend. This also applies to the second blade, and so on if additional blades are provided. Preferably, the ratio of the bending angle of the first arm to the bending angle of the second arm is between 0.35 and 0.7. Since the radius of curvature of the arms has a gradually changing shape, the defined measurement angle refers to the angle between the measured bottom of the deflection bend (the entrance of the bend) and the straight line connecting the tangent point of the entrance and the tangent point of the outlet of the bend. In the example shown, the first arm is defined with a bending angle of 38° and the second arm is defined with a bending angle of 48°.

[0043] Figures 8A to 10B The airflow distribution at the outlet of different hair dryers was compared. The airflow velocities shown in these diagrams are in m / s. Figure 8A and Figure 8B This relates to the bladeless curved section in the prior art. Figure 9A and Figure 9B The invention relates to a bend in the prior art comprising three conventional blades that are not bifurcated so as not to form a baffle at the exit of the bend, and whose curvature is substantially parallel to that of the bend. Figure 10A and Figure 10B Examples relating to a curved portion provided in a hair styling device according to the invention, specifically in... Figures 1 to 7B As shown in the diagram, the airflow distribution at the outlet of the hair dryer is improved according to the invention. In fact, the specific geometry of the blades achieves better airflow distribution, which also improves the heat distribution at the outlet of the hair styling device. Given the improved heat distribution, the hair styling device according to the invention achieves better styling results and is faster.

[0044] Figures 6A to 7B An example of a two-piece curved portion according to the present invention is shown. For convenience, the curved portion can be manufactured by assembling two parts, each part corresponding to half of the curved portion, such as... Figures 6A to 7B As shown. These two sections are different in order to form staggered baffles at the exit of the bend. In fact, as... Figure 6B and Figure 7B As shown, the blade arms are not at the same height at the exit of the bend. Regarding the base of the blade, each part consists of two halves of the blade, which, after the two parts are assembled, will form the base of the two blades.

Claims

1. A hair styling device (1), comprising: - A columnar body (2), including a distal side (14) and a proximal side (13) serving as a handle. - An axial air inlet opening (3) is located on the proximal side (13) of the columnar body (2); - A radial air outlet opening (4) is located on the distal side (14) of the columnar body (2); - A turbine, located in the cylindrical body (2), is driven to rotate by a motor during use, thereby drawing in air through the air inlet opening (3) and discharging air through the air outlet opening (4); - A deflection bend (5), located in the columnar body (2), is used to guide air moving axially in the columnar body (2) toward the radial air outlet opening (4), the deflection bend (5) including an air inlet (51) and an air outlet (52) and at least two blades (7) for orienting the airflow. The feature is that each of at least two of the blades (7) includes a base (12) arranged to divide the air inlet (51) of the deflection bend (5) into different channels (8), and wherein each of the blades (7) is bifurcated into at least two arms (10, 11) inside the deflection bend, thereby forming a set of baffles (9) at the air outlet (52) of the deflection bend (5).

2. The hair styling device according to claim 1, characterized in that, The bending angle of the first arm (10) of each blade (7) is greater than the bending angle of the second arm (11) of each blade (7).

3. The hair styling device according to any one of the preceding claims, characterized in that, The columnar body (2) includes an inner tube (6) connected to the air inlet (51) of the deflection bend (5) to deliver the axial airflow in the columnar body (2) of the hair dryer before it is deflected by the deflection bend (5), and the inner tube (6) forms a thermal insulation layer on the outer shell of the hair dryer.

4. The hair styling device according to any one of the preceding claims, characterized in that, The cross-sectional area of ​​the air inlet opening (3) is 180 cm². 2 Up to 300 cm 2 Between, and the cross-sectional area of ​​the air outlet opening (4) is between 200 cm². 2 Up to 500 cm 2 between.

5. The hair styling device according to any one of the preceding claims, characterized in that, The ratio of the distance between the air inlet opening (3) and the air outlet opening (4) to the total length of the columnar body (2) is between 0.05 and 0.

2.

6. The hair styling device according to any one of the preceding claims, characterized in that, The ratio of the diameter of the inner tube (6) to the diameter of the columnar body (2) is between 0.4 and 0.

9.

7. The hair styling device according to any one of the preceding claims, characterized in that, The ratio between the length of the inner tube (6) and the diameter of the inner tube (6) is between 3.5 and 6.

5.

8. The hair styling device according to any one of the preceding claims, characterized in that, The ratio of the bending angle of the first arm (10) to the bending angle of the second arm (11) is between 0.35 and 0.

7.

9. The hair styling device according to any one of the preceding claims, characterized in that, The baffles (9) located in the air outlet (4) are positioned in an alternating manner.

10. The hair styling device according to any one of the preceding claims, characterized in that, The deflection bend (5) is an assembly consisting of two parts, each of which corresponds to half of the deflection bend (5). The arms (10, 11) of the blade (7) are at different heights for each of the parts, thus forming the baffle (9) in an alternating arrangement.

11. The hair styling device according to any one of the preceding claims, characterized in that, The cross-section of the device is elliptical.

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