Air nozzle of hair drier

Abstract

The air nozzle comprises an outer air nozzle body and an inner air nozzle body, the inner air nozzle body is rotatably arranged in the outer air nozzle body, an air channel is formed in the inner air nozzle body, the air channel is communicated with an air outlet of an air blower, a driving part is arranged in the inner air nozzle body, and the driving part is located on a flowing path of airflow in the air channel. The driving part comprises a first airflow driving surface and a second airflow driving surface, a reference plane is defined by the rotating axis of the inner tuyere and the flowing path of airflow in the air duct, and the inclination angles of the first airflow driving surface and the second airflow driving surface relative to the reference plane are different. According to the tuyere, the stress balance of the inner tuyere is easily broken under the action of air flow blown out by the blower to generate torque causing initial rotation, the risk that the air flow cannot drive the inner tuyere to rotate is greatly reduced, air outlet is smoother, the air outlet range is large, the central air volume is abundant, user experience is better, and when the inner tuyere rotates, air flow resistance is small, and turbulent flow is little; and air flow is not branched.

Description

Technical Field

[0001] This application relates to the technical field of hair dryers, and specifically relates to a nozzle for a hair dryer. Background Art

[0002] Hair dryers are mainly used for drying and styling hair, and are common small household appliances in people's daily lives.

[0003] When using the hot air function of traditional hair dryers, it is usually necessary to swing the wrist back and forth. On the one hand, this is to avoid hot damage caused by concentrated hot air resulting in too high local temperature, and on the other hand, to improve the overall dryness of the hair. However, long-term swinging will inevitably cause wrist fatigue and then discomfort. Therefore, to solve the above problems, the current mainstream solution is to install a special nozzle to change the air flow direction of the hair dryer in real time to replace the action of wrist swinging.

[0004] The above special nozzle mainly includes an outer nozzle and an inner nozzle. The inner nozzle is rotatably arranged inside the outer nozzle. The air blown out by the hair dryer enters the inner nozzle, and the inner nozzle swings under the action of the air, so that the air can be blown out from different positions. Since the inner nozzle rotates completely under the action of wind, when the wind forces acting on the inner walls of various parts of the inner nozzle are relatively balanced, it is easy for the inner nozzle to be in a balanced state in the rotation direction, and then lose the torque for rotation, resulting in the risk that the air flow entering the inner nozzle cannot drive the inner nozzle to rotate, bringing a bad user experience. To further solve the problem that the air flow cannot drive the inner nozzle to rotate, the prior art mainly improves the side wall of the inner nozzle. For example, a nozzle for a hair dryer disclosed in Patent CN201810741547.5 has driving surfaces with different contours and driving arms with different lengths extended on the side walls on both sides of the inner nozzle. When the air flow passes through the inner nozzle and acts on the driving surfaces and driving arms, a torque causing initial rotation will be generated, so as to rotate continuously. However, due to the complex features of the inner nozzle in this solution, the manufacturing cost is relatively high, and the driving arms extending inward of the inner nozzle will cause different degrees of blockage to the air flow, resulting in flow velocity loss, limited range of air flow blowing, and easy generation of turbulent flow at the edge of the air duct outlet. Therefore, the structure of the inner nozzle still needs to be further improved. Summary of the Utility Model

[0005] This application provides a nozzle for a hair dryer to solve the technical problems that the improvement of the inner nozzle of the current hair dryer nozzle to improve the swinging problem results in a complex structure of the inner nozzle, high manufacturing cost, large air flow loss, and limited flow range.

[0006] The technical solution adopted in this application is as follows:

[0007] A hair dryer nozzle, comprising an outer nozzle and an inner nozzle, wherein the inner nozzle is rotatably arranged inside the outer nozzle, a duct is formed inside the inner nozzle, the duct is communicated with the air outlet of the hair dryer, a driving part is arranged inside the inner nozzle, the driving part is located on the flow path of the air flow inside the duct, the driving part comprises a first air flow driving surface and a second air flow driving surface, the rotation axis of the inner nozzle and the flow path of the air flow inside the duct define a reference plane, and the inclination angles of the first air flow driving surface and the second air flow driving surface relative to the reference plane are different respectively.

[0008] The hair dryer nozzle provided by this application further comprises the following additional technical features:

[0009] Both ends of the driving part are respectively connected to the inner side wall of the duct. The driving part comprises a first wall and a second wall connected in a V shape, and the opening direction of the V shape faces the outlet of the duct. The first wall and the second wall are located on both sides of the reference plane. The first air flow driving surface is located on the first wall, and the second air flow driving surface is located on the second wall.

[0010] The driving part comprises two sub-driving parts, the two sub-driving parts are respectively arranged on two opposite inner side walls of the duct and are symmetrically distributed along the central axis of the duct. The sub-driving part comprises a first wall and a second wall connected in a V shape, and the opening direction of the V shape faces the outlet of the duct. The first wall and the second wall are located on both sides of the reference plane. The first air flow driving surface is located on the first wall, and the second air flow driving surface is located on the second wall.

[0011] The inclination angle of the first wall relative to the reference plane is greater than the inclination angle of the second wall relative to the reference plane. A driving arm is arranged at one end of the first wall close to the air outlet of the duct, and the driving arm extends radially towards the side away from the opening of the V shape.

[0012] The inclination angle of the first wall relative to the reference plane is greater than the inclination angle of the second wall relative to the reference plane. Driving arms extending radially towards the side away from the opening of the V shape are arranged at one ends of the first wall and the second wall close to the air outlet of the duct, and the length of the driving arm on the first wall is greater than the length of the driving arm on the second wall.

[0013] The inclination angle of the first wall relative to the reference plane is greater than the inclination angle of the second wall relative to the reference plane. The second wall comprises a lower wall portion extending from the bottom of the V shape towards the opening and an upper wall portion extending from the lower wall portion towards the opening. The included angle between the lower wall portion and the reference plane is smaller than the included angle between the upper wall portion and the reference plane.

[0014] The driving part includes a first inclined plate and a second inclined plate. The first inclined plate and the second inclined plate are respectively connected to two opposite inner walls of the air duct. The first inclined plate and the second inclined plate are respectively inclined towards two sides of the reference plane. The first air flow driving surface is located on the first inclined plate, and the second air flow driving surface is located on the second inclined plate.

[0015] A first support plate and a second support plate are arranged in the air duct. The first support plate is connected to the inner wall of the air duct. The end of the first inclined plate close to the second inclined plate is connected to the first support plate, and the end of the second inclined plate close to the first inclined plate is connected to the second support plate.

[0016] The air nozzle further includes an air nozzle base. The inner air nozzle is rotatably installed on the air nozzle base. The outer air nozzle is sleeved on the air nozzle base and the inner air nozzle. The air nozzle base is provided with an air outlet corresponding to the air duct. At least part of the projection of the driving part towards the air outlet falls inside the air outlet.

[0017] The driving part is arranged close to the air outlet of the air duct and extends along the length direction of the air outlet. The width dimension of the air outlet is W1, and the dimension of the air outlet along the width direction of the air outlet is W2. Wherein, 1.05 < W1 / W2 ≤ 1.2.

[0018] Due to the adoption of the above technical solution, the technical effects obtained by this application at least include:

[0019] 1. For the hair dryer air nozzle provided by this application, the inner air nozzle is provided with a driving part located on the flow path of the air flow. The driving part includes a first air flow driving surface and a second air flow driving surface. The rotation axis of the inner air nozzle and the flow path of the air flow in the air duct define a reference plane. The inclination angles of the first air flow driving surface and the second air flow driving surface relative to the reference plane are different. When the hair dryer blows air towards the inner air nozzle, under the action of the air flow, the force directions of the first air flow driving surface and the second air flow driving surface are different. Under the impact of the air flow, it is easy to break the force balance of the inner air nozzle and generate a moment that causes initial rotation, greatly reducing the risk that the air flow cannot drive the inner air nozzle to rotate. Since the first air flow driving surface and the second air flow driving surface are arranged on the driving part, there is no need to modify the side wall of the inner air nozzle. The side walls on both sides of the inner air nozzle can be constructed with the same structure, and there is no need to set driving arms on the side walls on both sides. The side walls of the inner air nozzle can smoothly extend to the air outlet of the air duct, making the air outlet of the air duct smoother, with a larger air outlet range, sufficient central air volume, better user experience, small air flow resistance and less turbulent flow when the inner air nozzle rotates, and the air flow does not bifurcate.

[0020] 2. As a preferred embodiment of the present application, the driving part is connected into a V-shaped structure through the first wall and the second wall. The opening direction of the V shape faces the outlet of the air duct. The first air flow driving surface is located on the first wall, and the second air flow driving surface is located on the second wall. When the inner air nozzle intakes air, the air flow is divided at the tip of the V shape. Part of the air flow is guided by the driving part to the first wall, and the other part of the air flow is guided to the second wall. The windward angles of the first air flow driving surface and the second air flow driving surface are different, and the forces received are different, generating a moment that causes the initial rotation of the inner air nozzle. Moreover, the V-shaped structure basically does not impede the air flow, greatly reducing the wind loss and the generation of turbulent flow.

[0021] 3. As a preferred embodiment of the present application, a driving arm is provided at one end of the first wall close to the air duct outlet. The driving arm extends radially away from the opening of the V shape. When the air flow acts on the driving arm, it helps to increase the difference between the moment generated by the air flow on the first wall and the moment generated on the second wall, thereby effectively increasing the moment of the initial rotation of the inner air nozzle under the action of the air flow, helping to improve the response ability of the inner air nozzle to rotate under the action of the air flow, enhancing the reliability of rotation, and ensuring that the inner air nozzle can rotate normally under the conditions of low-speed and high-speed blowing of the hair dryer.

[0022] 4. As a preferred embodiment of the present application, the second wall includes a lower wall portion extending from the bottom of the V shape towards the opening and an upper wall portion extending from the lower wall portion towards the opening. The angle between the lower wall portion and the reference plane is smaller than the angle between the upper wall portion and the reference plane. The angle between the lower wall portion and the reference plane is much smaller than the angle between the first wall and the reference plane. The extending direction of the lower wall portion is more conforming to the flowing direction of the air flow, and the windward surface is smaller. The upper wall portion is the main force-receiving part when the air flow passes through the second wall, further reducing the contact area between the second air flow driving surface and the air flow, increasing the imbalance during air flow driving, improving the driving force, and at the same time reducing the wind resistance to the air flow.

[0023] 5. As a preferred embodiment of the present application, the driving part includes a first inclined plate and a second inclined plate. The first inclined plate and the second inclined plate are respectively inclined towards both sides of the reference plane. The first air flow driving surface is located on the first inclined plate, and the second air flow driving surface is located on the second inclined plate. When the air flow impacts the first inclined plate and the second inclined plate simultaneously, different-direction and different-magnitude acting forces will be generated on the first inclined plate and the second inclined plate respectively, imparting an initial moment for the rotation of the inner air nozzle, which is beneficial to reducing the wind resistance, increasing the central air output, enhancing the reliability of the inner air nozzle during operation, and ensuring that the inner air nozzle can rotate normally under different installation conditions.

[0024] 6. As a preferred embodiment of the present application, the nozzle base is provided with an air outlet corresponding to the air duct, and at least part of the projection of the driving part towards the air outlet falls inside the air outlet, so that when the air flow discharges from the air outlet, it can directly impact the driving part, and the air flow can act on the entire windward surface of the driving part, effectively increasing the torque difference generated by the air flow on the first air flow driving surface and the second air flow driving surface respectively, and reliably triggering the rotation of the inner nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments and descriptions thereof of the present application are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0026] Figure 1 is an exploded view of the hair dryer nozzle provided by the embodiment of the present application;

[0027] Figure 2 is a schematic structural diagram of the nozzle installed on the body of the hair dryer provided by the embodiment of the present application;

[0028] Figure 3 is a schematic structural diagram of the inner nozzle provided by the embodiment of the present application Figure 1 ;

[0029] Figure 4 is a schematic structural diagram of the inner nozzle provided by the embodiment of the present application Figure 2 ;

[0030] Figure 5 is a cross-sectional view of the inner nozzle provided by the embodiment of the present application Figure 1 ;

[0031] Figure 6 is a cross-sectional view of the inner nozzle provided by the embodiment of the present application Figure 2 ;

[0032] Figure 7 is a cross-sectional view of the inner nozzle provided by the embodiment of the present application Figure 3 ;

[0033] Figure 8 is a cross-sectional view of the inner nozzle provided by the embodiment of the present application Figure 4 ;

[0034] Figure 9 is a cross-sectional view of the inner nozzle provided by the embodiment of the present application Figure 5 ;

[0035] Figure 10 is a cross-sectional view of the inner nozzle provided by the embodiment of the present application Figure 6 ;

[0036] Figure 11 is a cross-sectional view of the inner nozzle provided by the embodiment of the present applicationFigure 7 ;

[0037] Figure 12 Cross-section of the inner air nozzle provided by the embodiment of the present application Figure 8 ;

[0038] Figure 13 Cross-section of the inner air nozzle provided by the embodiment of the present application Figure 9 ;

[0039] Figure 14 Cross-section of the air nozzle of the hair dryer provided by the embodiment of the present application Figure 1 ;

[0040] Figure 15 Cross-section of the air nozzle of the hair dryer provided by the embodiment of the present application Figure 2 ;

[0041] Figure 16 Structural schematic of the inner air nozzle provided by the embodiment of the present application Figure 3 ;

[0042] Figure 17 Cross-section of the inner air nozzle provided by the embodiment of the present application Figure 10 ;

[0043] Figure 18 Cross-section of the inner air nozzle provided by the embodiment of the present application Figure 10 One;

[0044] Figure 19 Cross-section of the air nozzle of the hair dryer provided by the embodiment of the present application Figure 3 .

[0045] List of components and reference numerals:

[0046] 1 Outer air nozzle;

[0047] 2 Inner air nozzle, 21 Driving part, 211 First air flow driving surface, 212 Second air flow driving surface, 213 First wall, 214 Second wall, 2141 Lower wall part, 2142 Upper wall part, 215 Sub-driving part, 216 Driving arm, 217 First inclined plate, 218 Second inclined plate, 22 Rotating shaft, 23 First support plate, 24 Second support plate;

[0048] 3 Body;

[0049] 4 Air nozzle base, 41 Air outlet, 42 Rotating hole. Detailed implementation manners

[0050] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail by way of examples in combination with the accompanying drawings of the specification.

[0051] In the following description, numerous specific details are set forth to provide a thorough understanding of the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0052] In addition, in the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0053] In the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0054] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0055] In the embodiments of the present application, a hair dryer nozzle is provided. For the convenience of description and understanding, the following content provided by the present application is all elaborated on the basis of the illustrated product structure. Of course, those skilled in the art can understand that the above structure is only a specific example and schematic description, and does not constitute a specific limitation to the technical solution provided by the present application.

[0056] Such as Figures 1 to 19As shown in the figure, a hair dryer nozzle provided by the present application includes an outer nozzle 1 and an inner nozzle 2. The inner nozzle 2 is rotatably arranged inside the outer nozzle 1. A wind channel is formed inside the inner nozzle 2. The wind channel is communicated with the air outlet of the hair dryer. A driving part 21 is arranged inside the inner nozzle 2. The driving part 21 is located on the flow path of the air flow inside the wind channel. The driving part 21 includes a first air flow driving surface 211 and a second air flow driving surface 212. The rotation axis of the inner nozzle 2 and the flow path of the air flow inside the wind channel define a reference plane. The inclination angles of the first air flow driving surface 211 and the second air flow driving surface 212 relative to the reference plane are different respectively.

[0057] Figure 2 Fig. shows the state when the nozzle is installed on the body 3 of the hair dryer. When the body 3 of the air outlet blows air, the air flow enters the wind channel of the inner nozzle 2, driving the inner nozzle 2 to rotate inside the outer nozzle 1, and finally the air flow is discharged through the outer nozzle 1. In a preferred embodiment, rotating shafts 22 can be arranged on both sides of the inner nozzle 2. The inner nozzle 2 is rotationally matched with corresponding components through the rotating shafts 22. The connection line of the two rotating shafts 22 on both sides constitutes the rotation axis of the inner nozzle 2. Figures 6 to 13 and Figure 17 and Figure 18 Fig. schematically represents the reference plane defined by the rotation axis of the inner nozzle 2 and the flow path of the air flow inside the wind channel with a dotted line X. The inner nozzle 2 is provided with a driving part 21 located on the flow path of the air flow. The driving part 21 includes a first air flow driving surface 211 and a second air flow driving surface 212. The inclination angles of the first air flow driving surface 211 and the second air flow driving surface 212 relative to the reference plane are different respectively. When the hair dryer blows air towards the inner nozzle 2, under the action of the air flow, the force directions of the first air flow driving surface 211 and the second air flow driving surface 212 are different. Under the impact of the air flow, it is easy to break the force balance of the inner nozzle 2 and generate a torque causing initial rotation, greatly reducing the risk that the air flow cannot drive the inner nozzle 2 to rotate. Since the first air flow driving surface 211 and the second air flow driving surface 212 are arranged on the driving part 21, there is no need to modify the side wall of the inner nozzle 2. The side walls on both sides of the inner nozzle 2 can be constructed with the same structure, and there is no need to set driving arms on the side walls on both sides. The side walls of the inner nozzle 2 can smoothly extend to the air outlet of the wind channel, making the air outlet of the wind channel smoother, with a larger air outlet range, sufficient central air volume, better user experience, small air flow resistance and less turbulent flow when the inner nozzle 2 rotates, and the air flow does not bifurcate.

[0058] In a preferred embodiment, the driving part 21 is integrally arranged at a position close to the air outlet of the wind channel, which not only satisfies the function of breaking the balance of the inner nozzle 2 under the action of the air flow, but also helps to shorten the length of the driving part 21, making the driving part 21 tend to be miniaturized, which helps to reduce the wind resistance. In addition, from the perspective of processing, compared with arranging the driving part 21 at a position closer to the inside of the inner nozzle 2, arranging the driving part 21 at a position close to the air outlet of the wind channel also makes the processing more convenient.

[0059] The structure of the driving part 21 in this application is not limited, and any one of the following embodiments can be adopted:

[0060] Embodiment 1: As Figure 1 and Figure 3 shown, both ends of the driving part 21 are respectively connected to the inner side walls of the air duct. The driving part 21 includes a first wall 213 and a second wall 214 connected in a V shape. The opening direction of the V shape faces the outlet of the air duct. The first wall 213 and the second wall 214 are located on both sides of the reference plane. The first air flow driving surface 211 is located on the first wall 213, and the second air flow driving surface 212 is located on the second wall 214. In this embodiment, the driving part 21 is an integral structure, extending between two opposite ends of the air duct, having a relatively large wind receiving area. Among them, the driving part 21 is connected into a V-shaped structure through the first wall 213 and the second wall 214. The opening direction of the V shape faces the outlet of the air duct. Correspondingly, the tip of the V shape faces the air inlet of the air duct. The first air flow driving surface 211 is located on the first wall 213 and is formed on the side of the first wall 213 facing away from the second wall 214. The second air flow driving surface 212 is located on the second wall 214 and is formed on the side of the second wall 214 facing away from the first wall 213. When the inner air nozzle 2 intakes air, the air flow is divided at the tip of the V shape. Part of the air flow is guided by the driving part 21 to the first wall 213, and the other part of the air flow is guided to the second wall 214. The windward angles of the first air flow driving surface 211 and the second air flow driving surface 212 are different, and the forces are different, generating a torque that causes the initial rotation of the inner air nozzle 2. Moreover, the V-shaped structure basically does not obstruct the air flow, greatly reducing the wind loss and reducing the generation of turbulent flow.

[0061] Embodiment 2: As Figure 4 and Figure 5 shown, different from the solution in Embodiment 1 where the driving part 21 is an integral structure, in this embodiment, the driving part 21 is a split structure, specifically including two sub-driving parts 215. The two sub-driving parts 215 are respectively arranged on two opposite inner side walls of the air duct and are symmetrically distributed along the central axis of the air duct. The sub-driving part 215 still includes a first wall 213 and a second wall 214 connected in a V shape. The opening direction of the V shape faces the outlet of the air duct. The first wall 213 and the second wall 214 are located on both sides of the reference plane. The first air flow driving surface 211 is located on the first wall 213, and the second air flow driving surface 212 is located on the second wall 214. Those skilled in the art can understand that the V shape of the sub-driving part 215 has the same effect as the solution in Embodiment 1. Moreover, the overall length of the two sub-driving parts 215 is relatively short, which is beneficial to reducing wind resistance, reducing turbulent flow, making the air outlet smoother, and having a larger air outlet range.

[0062] Based on the further improvement of the technical solutions in the foregoing Embodiment 1 or Embodiment 2, the structures of the driving part 21 in Embodiment 1 and the sub-driving part 215 in Embodiment 2 can both adopt any one of the following examples:

[0063] Example 1: As shown in Figures 6 to 9 , both the first wall 213 and the second wall 214 are set as straight walls inclined with respect to the reference plane, and the inclination angles of the first wall 213 and the second wall 214 with respect to the reference plane are greater than the inclination angle of the second wall 214 with respect to the reference plane. Figure 6 In Figures 7 to 9 , α is schematically used to represent the inclination angle of the first wall 213 with respect to the reference plane, and β is used to represent the inclination angle of the second wall 214 with respect to the reference plane, and α > β. Taking Figures 7 to 9 as an example, Figure 7 the dotted arrow in Figure 7 represents the air flow path in the air duct. Since α > β, in the initial state when the inner air nozzle 2 in Figure 8 does not rotate, the windward force on the first air flow driving surface 211 is greater than the windward force on the second air flow driving surface 212, and the inner air nozzle 2 will rotate to one side accordingly, that is, from the state shown in Figure 8 to the state shown in Figure 9 . At the same time, the windward angles on both sides are also changing. After swinging through a certain stroke, the windward force on the first air flow driving surface 211 will be less than the windward force on the second air flow driving surface 212, and the inner air nozzle 2 will start to rotate to the other side accordingly, that is, from the state shown in

[0064]

[0065] Figure 10 Example 2: Different from the solution in the foregoing Example 1, in this example, as shown in Figure 10As shown, on the basis that the inclination angle of the first wall 213 relative to the reference plane is greater than the inclination angle of the second wall 214 relative to the reference plane, a driving arm 216 can be provided at one end of the first wall 213 close to the air duct outlet, and the driving arm 216 extends radially toward the side away from the opening of the V shape. Through the arrangement of the driving arm 216, when the air flow in the air duct acts on the driving arm 216, it helps to increase the difference between the torque generated by the air flow on the first wall 213 and the torque generated on the second wall 214, thereby effectively increasing the torque for the initial rotation of the inner nozzle 2 under the action of the air flow, helping to improve the response ability of the inner nozzle 2 to rotate under the action of the air flow, enhancing the reliability of rotation, and ensuring that the inner nozzle 2 can rotate normally under the conditions of low - gear and high - gear blowing of the hair dryer.

[0066] Example 3: Different from the solution of the foregoing Example 2, in this example, as Figure 11 shown, still on the basis that the inclination angle of the first wall 213 relative to the reference plane is greater than the inclination angle of the second wall 214 relative to the reference plane, driving arms 216 extending radially toward the side away from the opening of the V shape can be provided at one end of both the first wall 213 and the second wall 214 close to the air duct outlet, and the length of the driving arm 216 on the first wall 213 is greater than the length of the driving arm 216 on the second wall 214. When the air flow in the air duct acts on the driving arms 216 on both sides, the forces on the driving arms 216 on both sides are different, which can increase the torque for the initial rotation of the inner nozzle 2 and help to improve the response ability of the inner nozzle 2 to rotate under the action of the air flow.

[0067] Example 4: This example is based on the technical solution in the foregoing Example 3. As Figure 12 shown, the second wall 214 includes a lower wall portion 2141 extending from the bottom of the V shape toward the opening and an upper wall portion 2142 extending from the lower wall portion 2141 toward the opening. The angle between the lower wall portion 2141 and the reference plane is smaller than the angle between the upper wall portion 2142 and the reference plane. Since the inclination angle of the first wall 213 relative to the reference plane is greater than the inclination angle of the second wall 214 relative to the reference plane, and the angle between the lower wall portion 2141 and the reference plane is smaller than the angle between the upper wall portion 2142 and the reference plane, the angle between the lower wall portion 2141 and the reference plane is much smaller than the angle between the first wall 213 and the reference plane. The extending direction of the lower wall portion 2141 is more conforming to the flow direction of the air flow, and the windward area is smaller, making the upper wall portion 2142 the main force - receiving part when the air flow passes through the second wall 214, further reducing the contact area between the second air - flow driving surface 212 and the air flow, increasing the imbalance during air - flow driving, improving the driving force, and at the same time reducing the wind resistance to the air flow. And as an alternative form, as Figure 13As shown, this example can also be based on the technical solution in the first example above where neither the first wall 213 nor the second wall 214 is provided with the driving arm 216, so that the second wall 214 includes an upper wall portion 2142 and a lower wall portion 2141, which can also achieve the effect of reducing the contact area between the second air flow driving surface 212 and the air flow and increasing the imbalance during air flow driving.

[0068] Embodiment 3: Different from the technical solutions in the first embodiment where the driving part 21 is V-shaped and the sub-driving part 215 is V-shaped in the second embodiment, in this embodiment, as Figures 16 to 19 shown, the driving part 21 includes a first inclined plate 217 and a second inclined plate 218. The first inclined plate 217 and the second inclined plate 218 are respectively connected to two opposite inner walls of the air duct. The first inclined plate 217 and the second inclined plate 218 are respectively inclined towards both sides of the reference plane. The first air flow driving surface 211 is located on the first inclined plate 217, and the second air flow driving surface 212 is located on the second inclined plate 218. When the air flow impacts the first inclined plate 217 and the second inclined plate 218 simultaneously, different-direction and different-magnitude acting forces will be generated on the first inclined plate 217 and the second inclined plate 218 respectively, giving the inner air nozzle 2 an initial moment of rotation, which is beneficial to reducing wind resistance, increasing the central air output, improving the reliability of the inner air nozzle 2 working, and ensuring that the inner air nozzle 2 can rotate normally under different installation conditions. Preferably, the angle of the first inclined plate 217 relative to the reference plane can be made greater than the angle of the second inclined plate 218 relative to the reference plane. As Figure 13 and Figure 18 shown, this application schematically shows the angle γ of the first inclined plate 217 relative to the reference plane and the angle φ of the second inclined plate 218 relative to the reference plane, and γ is greater than φ. Further preferably, the difference between γ and φ is in the range of 5 - 10°.

[0069] Furthermore, as Figure 16 shown, a first support plate 23 and a second support plate 24 are provided in the air duct. The first support plate 23 is connected to the inner wall of the air duct. The end of the first inclined plate 217 close to the second inclined plate 218 is connected to the first support plate 23, and the end of the second inclined plate 218 close to the first inclined plate 217 is connected to the second support plate 24. Through the arrangement of the first support plate 23 and the second support plate 24, on the one hand, the first inclined plate 217 and the second inclined plate 218 are strengthened to prevent the deformation of the first inclined plate 217 and the second inclined plate 218 from affecting the overall force on the inner air nozzle 2, which is beneficial to improving the stability of the air nozzle working; on the other hand, the first support plate 23 and the second support plate 24 divide the air outlet into three regions, including the middle region between the first support plate 23 and the second support plate 24 and the two side regions where the first inclined plate 217 and the second inclined plate 218 are respectively located, which can prevent the air flow with changed directions in the two side regions from mixing into the central region and affecting the air flow in the central region, making the central air output more stable.

[0070] As a preferred embodiment, as shown in Figure 1 , Figure 14 and Figure 19 , the hair dryer nozzle further includes a nozzle base 4. The inner nozzle 2 is rotatably mounted on the nozzle base 4. The outer nozzle 1 is sleeved on the nozzle base 4 and the nozzle. The nozzle base 4 is provided with an air outlet 41 corresponding to the air duct, and at least a part of the projection of the driving part 21 towards the air outlet 41 falls inside the air outlet 41. Taking the scheme in which the two sides of the inner nozzle 2 are provided with rotating shafts 22 to realize rotation through the rotating shafts 22 as an example, rotating holes 42 adapted to the rotating shafts 22 can be provided at both ends of the nozzle base 4, and the inner nozzle 2 rotates under the action of air flow through the pivot fit between the rotating shafts 22 and the rotating holes 42. The outer nozzle 1 is sleeved on the nozzle base 4 and the inner nozzle 2, and the nozzle base 4 can be used to cooperate with the body 3 of the hair dryer to realize the in-place installation of the nozzle on the body 3. The nozzle base 4 is provided with an air outlet 41 corresponding to the air duct. The air flow blown out by the body 3 of the hair dryer first enters the nozzle base 4, and then enters the air duct of the inner nozzle 2 through the air outlet 41. At least a part of the projection of the driving part 21 towards the air outlet 41 falls inside the air outlet 41, so that when the air flow is discharged from the air outlet 41, it can directly impact the driving part 21, and the air flow can act on the entire windward surface of the driving part 21, effectively increasing the moment difference generated by the air flow on the first air flow driving surface 211 and the second air flow driving surface 212 respectively, and reliably triggering the rotation of the inner nozzle 2.

[0071] Furthermore, as shown in Figure 14 , the driving part 21 is arranged close to the air outlet of the air duct and extends along the length direction of the air outlet. The width dimension of the air outlet is W1, and the dimension of the air outlet 41 along the width direction of the air outlet is W2. Among them, 1.05 < W1 / W2 ≤ 1.2, so that the width W1 of the air outlet of the inner nozzle 2 is not less than the width W2 of the air outlet 41 of the nozzle base 4. When W1 is less than W2, both side walls of the inner nozzle 2 will be affected by the air flow, thus affecting the overall force on the inner nozzle 2, increasing uncertainty, or causing a phenomenon where rotation cannot be triggered. Therefore, W1 being greater than W2 can minimize the force on the side walls of the inner nozzle 2 as much as possible, enable the air flow to fully act on the driving part 21, be conducive to improving the rotation reliability of the inner nozzle 2, and reducing the risk of failure.

[0072] In addition, in the scheme where the driving part 21 includes two sub-driving parts 215 in the foregoing Embodiment 2, as shown in Figure 15 , the distance between the two sub-driving parts 215 is set as L1, and the length dimension of the air outlet 41 is set as L2. To ensure that the air flow discharged from the air outlet 41 acts on the driving part 21, L1 should be less than L2, preferably 0.8 ≤ L1 / L2 ≤ 0.9. In this way, the air flow can impact the driving part 21 and trigger the rotation of the inner nozzle 2, but the impact area is not too large to increase the resistance, which is conducive to reducing the resistance to the air flow and avoiding the poor experience caused by the bifurcation of the air flow on the premise of realizing the function.

[0073] What is not described in this application can be realized by adopting or referring to the prior art.

[0074] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other, and the key point of each embodiment is to illustrate the differences from other embodiments.

[0075] The above description is only for the embodiments of this application and is not intended to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. A hair dryer nozzle, comprising an outer nozzle and an inner nozzle. The inner nozzle is rotatably disposed within the outer nozzle. A wind channel is formed within the inner nozzle, and the wind channel is in communication with the air outlet of the hair dryer. It is characterized in that, A driving part is provided inside the inner air nozzle. The driving part is located on the flow path of the air flow in the air duct. The driving part includes a first air flow driving surface and a second air flow driving surface. The rotation axis of the inner air nozzle and the flow path of the air flow in the air duct define a reference plane. The inclination angles of the first air flow driving surface and the second air flow driving surface with respect to the reference plane are different respectively.

2. The hair dryer nozzle according to claim 1, wherein Both ends of the driving part are respectively connected to the inner side wall of the air duct. The driving part includes a first wall and a second wall connected in a V shape. The opening direction of the V shape faces the outlet of the air duct. The first wall and the second wall are located on both sides of the reference plane. The first air flow driving surface is located on the first wall, and the second air flow driving surface is located on the second wall.

3. The hair dryer nozzle according to claim 1, wherein The driving part includes two sub-driving parts. The two sub-driving parts are respectively arranged on two opposite inner side walls of the air duct and are symmetrically distributed along the central axis of the air duct. Each sub-driving part includes a first wall and a second wall connected in a V shape. The opening direction of the V shape faces the outlet of the air duct. The first wall and the second wall are located on both sides of the reference plane. The first air flow driving surface is located on the first wall, and the second air flow driving surface is located on the second wall.

4. The hair dryer nozzle according to claim 2 or 3, wherein The inclination angle of the first wall with respect to the reference plane is greater than the inclination angle of the second wall with respect to the reference plane. A driving arm is provided at one end of the first wall close to the air duct outlet, and the driving arm extends radially away from the opening of the V shape.

5. The hair dryer nozzle according to claim 2 or 3, wherein The inclination angle of the first wall with respect to the reference plane is greater than the inclination angle of the second wall with respect to the reference plane. Driving arms extending radially away from the opening of the V shape are provided at one ends of the first wall and the second wall close to the air duct outlet, and the length of the driving arm on the first wall is greater than the length of the driving arm on the second wall.

6. The hair dryer nozzle according to claim 2 or 3, wherein The inclination angle of the first wall with respect to the reference plane is greater than the inclination angle of the second wall with respect to the reference plane. The second wall includes a lower wall portion extending from the bottom of the V shape towards the opening and an upper wall portion extending from the lower wall portion towards the opening. The included angle between the lower wall portion and the reference plane is smaller than the included angle between the upper wall portion and the reference plane.

7. The hair dryer nozzle according to claim 1, wherein The driving part includes a first inclined plate and a second inclined plate. The first inclined plate and the second inclined plate are respectively connected to two opposite inner walls of the air duct. The first inclined plate and the second inclined plate are respectively inclined towards both sides of the reference plane. The first air flow driving surface is located on the first inclined plate, and the second air flow driving surface is located on the second inclined plate.

8. The hair dryer nozzle according to claim 7, wherein A first support plate and a second support plate are provided in the air duct. The first support plate is connected to the inner wall of the air duct. The end of the first inclined plate close to the second inclined plate is connected to the first support plate. The end of the second inclined plate close to the first inclined plate is connected to the second support plate.

9. The hair dryer nozzle according to claim 1, wherein it further includes a nozzle base. The inner nozzle is rotatably mounted on the nozzle base. The outer nozzle is sleeved on the nozzle base and the inner nozzle. The nozzle base is provided with an air outlet corresponding to the air duct. At least part of the projection of the driving part towards the air outlet falls inside the air outlet.

10. The hair dryer nozzle according to claim 9, wherein the driving part is arranged close to the air outlet of the air duct and extends along the length direction of the air outlet. The width dimension of the air outlet is W1, and the dimension of the air outlet along the width direction of the air outlet is W2. Wherein, 1.05 < W1 / W2 ≤ 1.2.

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