Air nozzle assembly of hair drier

Abstract

The air nozzle assembly comprises an air nozzle seat, an inner air nozzle rotationally installed on the air nozzle seat and an outer air nozzle arranged on the outer side of the air nozzle seat and the inner air nozzle in a sleeving mode, a sliding groove and a gear clamping rib are arranged on the outer side wall of the air nozzle seat, and a sliding rail, a gear adjusting structure and a locking rib are arranged on the side wall of the outer air nozzle. The inner tuyere is provided with a stop convex rib matched with the locking rib to limit the rotation amplitude of the inner tuyere, the gear shifting structure comprises a locking gear groove, an unlocking gear groove and a plurality of rotation amplitude adjusting gear grooves formed between the locking gear groove and the unlocking gear groove, and the outer tuyere rotates in the circumferential direction of the tuyere base through matching of the sliding groove and the sliding rail. The gear clamping rib is switched among the locking gear groove, the multiple rotation amplitude adjusting gear grooves and the unlocking gear groove so as to adjust the distance between the locking rib and the stopping convex rib and limit the rotation amplitude of the inner tuyere. According to the tuyere assembly, the rotation amplitude and frequency of the inner tuyere can be adjusted, and the tuyere assembly is simple in structure, easy and convenient to operate, stable and reliable.

Description

Technical Field

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

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

[0003] Hair dryers mainly rely on high-speed moving hot air currents to remove moisture from the hair and dry the hair. For rapid and uniform hair drying, when using the hot air function, it is usually necessary to swing the wrist back and forth. On the one hand, this avoids heat damage caused by concentrated hot air leading to excessive local temperature, and on the other hand, it improves 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 wrist swinging action. This 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 rotates under the action of the air, so that the air can be blown out from different positions.

[0004] For example, a hair dryer air-sweeping assembly disclosed in Patent CN202123300684.1, the inner nozzle is rotatably hinged at one end of the nozzle seat. The inner nozzle is provided with a through-channel. When the air flow blown out by the hair dryer enters the channel, it drives the inner nozzle to rotate relative to the nozzle seat. Generally, in a hair dryer where the inner nozzle can rotate, the inner nozzle usually has a locked state and a rotatable state. After the inner nozzle is locked in the locked state through the locking structure, the rotational freedom of the inner nozzle is restricted and it cannot rotate under the action of the air flow to achieve directional air blowing. After the locking structure unlocks the inner nozzle, the inner nozzle can rotate under the action of the air flow to achieve multi-directional air blowing. For example, in the hair dryer air-sweeping assembly of the aforementioned patent, the locking and unlocking of the inner nozzle are achieved through the cooperation of a locking rib and a protruding rib. The swing amplitude and frequency of the inner nozzle affect the size of the air supply diffusion and have a greater impact on the drying speed. However, in this type of hair dryer, the inner nozzle only has two working states: locking and swinging with a fixed amplitude, which is difficult to meet the needs of consumers for various hair drying and styling forms. Summary of the Utility Model

[0005] This application provides a nozzle assembly of a hair dryer to solve the technical problem that the current hair dryers with rotatable inner nozzles have few switchable operations and are difficult to meet the needs of consumers for various hair drying and styling forms.

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

[0007] A nozzle assembly for a hair dryer, comprising a nozzle base, an inner nozzle rotatably mounted on the nozzle base, and an outer nozzle sleeved on the outer sides of the nozzle base and the inner nozzle. A chute and a gear position clamping rib are provided on the outer side wall of the nozzle base. A slide rail, a gear shifting structure and a locking rib are provided on the side wall of the outer nozzle. The inner nozzle is provided with a stop convex rib for cooperating with the locking rib to limit the rotation amplitude of the inner nozzle. The gear shifting structure includes a locking gear position groove, an unlocking gear position groove and a plurality of rotation amplitude adjustment gear position grooves provided between the locking gear position groove and the unlocking gear position groove. The outer nozzle rotates circumferentially along the nozzle base through the cooperation of the chute and the slide rail. The gear position clamping rib switches between the locking gear position groove, the plurality of rotation amplitude adjustment gear position grooves and the unlocking gear position groove to adjust the distance between the locking rib and the stop convex rib so as to limit the rotation amplitude of the inner nozzle.

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

[0009] The nozzle base is provided with an elastic part capable of elastic deformation. The gear position clamping rib is arranged on the elastic part. The outer nozzle rotates circumferentially. The elastic part is elastically deformed under the extrusion force, so that the gear position clamping rib can be engaged with or disengaged from the locking gear position groove, the plurality of rotation amplitude adjustment gear position grooves and the unlocking gear position groove respectively.

[0010] One end of the chute is provided with a stop part. The outer nozzle rotates in the first direction. The gear position clamping rib is engaged with the locking gear position groove. The slide rail abuts against the stop part to limit the outer nozzle from continuing to rotate circumferentially in the first direction.

[0011] A limiting convex part is provided on the inner side wall of the outer nozzle. The limiting convex part is arranged close to the unlocking gear position groove. The outer nozzle rotates in the second direction. The gear position clamping rib is engaged with the unlocking gear position groove. The limiting convex part abuts against the gear position clamping rib to limit the outer nozzle from continuing to rotate along the second direction.

[0012] The gear position clamping rib is arranged at the edge on one side of the chute. The locking gear position groove, the plurality of rotation amplitude adjustment gear position grooves and the unlocking gear position groove are arranged circumferentially along the slide rail.

[0013] The included angle between the central axis of the locking gear position groove and the central axis of the unlocking gear position groove is α, and α≤30°.

[0014] The included angle between the central axes of two adjacent rotation amplitude adjustment gear position grooves is β, and 1.5°≤β≤6°.

[0015] A rotating shaft is provided on the inner side wall of the inner nozzle. The nozzle base is provided with a rotating hole adapted to the rotating shaft. The inner nozzle is sleeved on one end of the nozzle base, so that the rotating shaft and the rotating hole are rotationally matched. The stop convex rib is arranged on the outer side wall of the inner nozzle. The rotating shaft and the stop convex rib are arranged on the same central symmetry plane of the inner nozzle.

[0016] The nozzle assembly further includes a rectifying inner cover, which is installed in the nozzle seat. A rectifying channel is formed between the rectifying inner cover and the inner wall of the nozzle seat to connect the air outlet of the blower body with the inner nozzle. The rectifying inner cover is provided with a rotation guiding structure for guiding the rotation of the nozzle assembly relative to the blower body.

[0017] The nozzle seat is circumferentially provided with a first magnetic member, and the blower body is provided with a second magnetic member magnetically coupled with the first magnetic member. The nozzle assembly is magnetically coupled to the body through the first magnetic member and the second magnetic member.

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

[0019] 1. For the nozzle assembly of the hair dryer provided in this application, on the basis that the inner nozzle is rotatably installed on the nozzle seat to enable multi-directional air blowing, by providing a gear rib on the nozzle seat, a gear shifting structure and a locking rib on the outer nozzle, and a stop rib on the inner nozzle, the rotation amplitude of the inner nozzle can be adjusted through the cooperation of the gear rib and the gear shifting structure. Specifically, when the locking rib abuts against the stop rib, the rotational freedom of the inner nozzle is restricted and it is in a locked state. At this time, the gear rib is engaged in the locking gear slot to restrict the circumferential rotation of the outer nozzle, ensuring that the locking rib and the stop rib are stably in an abutting state to improve the locking stability of the inner nozzle; when the outer nozzle is rotated to disengage the locking rib from the stop rib, the locking rib no longer restricts the rotational freedom of the inner nozzle, and the inner nozzle can rotate. Moreover, the distance between the locking rib and the stop rib determines the magnitude of the rotation amplitude of the inner nozzle. The rotation amplitude of the inner nozzle increases as the distance between the locking rib and the stop rib increases within a certain range, realizing that the rotation amplitude and frequency of the inner nozzle can be adjusted. The structure is simple, the operation is convenient, it is stable and reliable, the rotation amplitude is large, the air supply diffusion range is large, the air supply distance is short, the rotation frequency is large, the speed of the air moving in the hair is fast, accelerating the air flow diffusion, quickly drying the hair, enhancing the scalp massage feeling, the swing frequency is small, the air moves slowly in the hair, which is beneficial to the shaping of the hair strands. During the process of adjusting the rotation amplitude of the inner nozzle, the gear rib is engaged with different rotation amplitude adjustment gear slots. On the one hand, after the gear rib is engaged with the rotation amplitude adjustment gear slot, it restricts the circumferential rotation of the outer nozzle, ensuring that the inner nozzle is stabilized in the corresponding gear state and preventing automatic gear shifting. On the other hand, when the outer nozzle is rotated to switch the gear rib in different rotation amplitude adjustment gear slots, a sound similar to "click" can also be emitted to prompt the user that the gear adjustment process is in progress and to improve the rotation feel; when the outer nozzle is rotated to make the gear rib engaged with the unlocking gear slot, the inner nozzle is completely unlocked and can reach the maximum rotation amplitude, and the gear rib is engaged in the unlocking gear slot to restrict the circumferential rotation of the outer nozzle, ensuring that the inner nozzle is stabilized in the fully unlocked state and preventing automatic gear shifting. In addition, the outer nozzle is also provided with a slide rail, and the nozzle seat is provided with a chute. The rotation of the outer nozzle relative to the nozzle seat is guided through the cooperation of the slide rail and the chute, ensuring that the outer nozzle can rotate stably to adjust the rotation amplitude of the inner nozzle.

[0020] 2. As a preferred embodiment of the present application, the gear catch ribs are arranged on the elastic part of the nozzle seat. The elastic part undergoes elastic deformation under the extrusion force, enabling the gear catch ribs to engage with or disengage from the locking gear slot, multiple rotation amplitude adjustment gear slots, and the unlocking gear slot respectively. Therefore, when the outer nozzle rotates, the elastic part deforms inward under the pressure of the outer nozzle on the gear catch ribs, allowing the gear catch ribs to smoothly switch between the locking gear slot, multiple rotation amplitude adjustment gear slots, and the unlocking gear slot, effectively reducing the risk of the gear catch ribs breaking. After the switching is completed, the elastic part restores its deformation to ensure that the gear catch ribs are stably engaged in the corresponding locking gear slot, rotation amplitude adjustment gear slot, or unlocking gear slot.

[0021] 3. As a preferred embodiment of the present application, a stop portion is provided at one end of the sliding groove. When the gear catch ribs are engaged with the locking gear slot, the sliding rail abuts against the stop portion to limit the further circumferential rotation of the outer nozzle in the first direction. At this time, the engagement of the gear catch ribs with the locking gear slot and the abutment of the sliding rail with the stop portion together limit the locking rib and the stop convex rib in the locked state, achieving double-limit locking to ensure that the locking rib and the stop convex rib are stably in the abutting state, effectively improving the locking stability of the inner nozzle.

[0022] 4. As a preferred embodiment of the present application, a limiting convex portion is provided on the inner side wall of the outer nozzle. When the gear catch ribs are engaged with the unlocking gear slot, the limiting convex portion abuts against the gear catch ribs to limit the further rotation of the outer nozzle in the second direction. At this time, the engagement of the gear catch ribs with the unlocking gear slot and the abutment with the limiting convex portion together limit the stop convex rib in the fully unlocked state, achieving double-limit unlocking to ensure the stability of the maximum rotation amplitude of the inner nozzle.

[0023] 5. As a preferred embodiment of the present application, the included angle between the central axis of the locking gear slot and the central axis of the unlocking gear slot is α, and α ≤ 30°. That is, the rotation angle of the outer nozzle required for the locking state and the fully unlocked state of the inner nozzle is limited within 30°, ensuring that the outer nozzle adjusts the gear within a suitable rotation angle range, avoiding too small an angle range that results in a small design space and a small number of design for the rotation amplitude adjustment gear slots, and also avoiding too large an angle range that increases the difficulty of rotating and adjusting the gear of the outer nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and form 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 of the present application. In the drawings:

[0025] Figure 1 is an exploded view of the nozzle assembly provided by the embodiment of the present application;

[0026] Figure 2Schematic diagram of the structure of the nozzle assembly provided by the embodiment of the present application mounted on the body of the hair dryer;

[0027] Figure 3 Schematic diagram of the structure of the inner nozzle provided by the embodiment of the present application Figure 1 ;

[0028] Figure 4 Schematic diagram of the structure of the inner nozzle provided by the embodiment of the present application Figure 2 ;

[0029] Figure 5 Schematic diagram of the structure of the outer nozzle provided by the embodiment of the present application Figure 1 ;

[0030] Figure 6 Schematic diagram of the structure of the outer nozzle provided by the embodiment of the present application Figure 2 ;

[0031] Figure 7 Schematic diagram of the structure of the outer nozzle provided by the embodiment of the present application Figure 3 ;

[0032] Figure 8 Schematic diagram of the structure of the nozzle base provided by the embodiment of the present application;

[0033] Figure 9 Assembly of the nozzle assembly provided by the embodiment of the present application Figure 1 ;

[0034] Figure 10 Assembly of the nozzle assembly provided by the embodiment of the present application Figure 2 ;

[0035] Figure 11 Cross-section of the nozzle assembly provided by the embodiment of the present application Figure 1 ;

[0036] Figure 12 is Figure 11 Partial enlarged view of the structure at A in

[0037] Figure 13 Partial cross-section of the nozzle assembly provided by the embodiment of the present application;

[0038] Figure 14 Cross-section of the nozzle assembly provided by the embodiment of the present application Figure 2 ;

[0039] Figure 15 is Figure 14 Partial enlarged view of the structure at B in

[0040] Figure 16 Schematic diagram of the structure of the rectifying inner cover provided by the embodiment of the present application;

[0041] Figure 17 It is a partial view of the body of the hair dryer provided by the embodiment of the present application;

[0042] Figure 18 It is a cross-sectional view of the assembly component formed by the body and the nozzle assembly of the hair dryer provided by the embodiment of the present application.

[0043] List of components and reference numerals:

[0044] 1 Nozzle base, 11 Slide groove, 12 Gear rib, 13 Elastic part, 14 Stopping part, 15 Rotating hole;

[0045] 2 Inner nozzle, 21 Stopping rib, 22 Rotating shaft;

[0046] 3 Outer nozzle, 31 Slide rail, 32 Locking rib, 33 Locking gear groove, 34 Unlocking gear groove, 35 Rotation amplitude adjustment gear groove, 36 Limiting convex part;

[0047] 4 Rectifying inner cover, 41 Guide rib;

[0048] 5 Body, 51 Guide slide groove;

[0049] 6 Permanent magnet ring. 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 conjunction with the accompanying drawings of the specification.

[0051] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope 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 relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 therefore should not be construed as a limitation to the present application.

[0053] In this application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means 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 this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

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

[0056] As Figures 1 to 18 shown, a nozzle assembly of a hair dryer provided in this application includes a nozzle base 1, an inner nozzle 2 rotatably installed on the nozzle base 1, and an outer nozzle 3 sleeved outside the nozzle base 1 and the inner nozzle 2. A chute 11 and a gear position locking rib 12 are provided on the outer side wall of the nozzle base 1. A slide rail 31, a gear shifting structure, and a locking rib 32 are provided on the side wall of the outer nozzle 3. The inner nozzle 2 is provided with a stop rib 21 that cooperates with the locking rib 32 to limit the rotation amplitude of the inner nozzle 2. The gear shifting structure includes a locking gear position groove 33, an unlocking gear position groove 34, and a plurality of rotation amplitude adjustment gear position grooves 35 provided between the locking gear position groove 33 and the unlocking gear position groove 34. The outer nozzle 3 rotates circumferentially along the nozzle base 1 through the cooperation of the chute 11 and the slide rail 31, and the gear position locking rib 12 switches between the locking gear position groove 33, the plurality of rotation amplitude adjustment gear position grooves 35, and the unlocking gear position groove 34 to adjust the distance between the locking rib 32 and the stop rib 21 and thus limit the rotation amplitude of the inner nozzle 2.

[0057] In the nozzle assembly of this application, the inner nozzle 2 is rotatably installed on the nozzle base 1, the outer nozzle 3 is sleeved outside the nozzle base 1 and the inner nozzle 2, and the nozzle assembly can be installed on the body of the hair dryer through the nozzle base 1. Figure 2Figure 0 schematically shows the state where the nozzle assembly is installed on the body 5 of the hair dryer. The inner nozzle 2 can rotate under the action of the air flow blown out by the body 5 to achieve multi-directional air blowing. On this basis, by providing a gear rib 12 on the nozzle base 1, a gear adjustment structure and a locking rib 32 on the outer nozzle 3, and a stop rib 21 on the inner nozzle 2, the rotation amplitude of the inner nozzle 2 can be adjusted by the cooperation of the gear rib 12 and the gear adjustment structure. Specifically, Figure 9 Figure 1 shows the state where the locking rib 32 abuts against the stop rib 21. Figure 10 Figure 2 shows the state where the locking rib 32 disengages from the stop rib 21. When the locking rib 32 abuts against the stop rib 21, the rotational freedom of the inner nozzle 2 is restricted and it is in a locked state. At this time, the gear rib 12 is engaged in the locking gear slot 33 to restrict the circumferential rotation of the outer nozzle 3, ensuring that the locking rib 32 and the stop rib 21 are stably in the abutting state to improve the locking stability of the inner nozzle 2; when the outer nozzle 3 is rotated to disengage the locking rib 32 from the stop rib 21, the locking rib 32 no longer restricts the rotational freedom of the inner nozzle 2, and the inner nozzle 2 can rotate. Moreover, the distance between the locking rib 32 and the stop rib 21 determines the rotation amplitude of the inner nozzle 2. The rotation amplitude of the inner nozzle 2 increases as the distance between the locking rib 32 and the stop rib 21 increases within a certain range, realizing that the rotation amplitude and frequency of the inner nozzle 2 can be adjusted. The structure is simple, the operation is convenient, stable and reliable. With a large rotation amplitude, the air supply diffusion range is large, the air supply distance is short, the rotation frequency is high, the air moves fast on the hair, accelerating the air flow diffusion, quickly drying the hair, enhancing the scalp massage feeling, and with a small swing frequency, the air moves slowly on the hair, which is beneficial to the shaping of the hair strands. During the process of adjusting the rotation amplitude of the inner nozzle 2, the gear rib 12 is engaged with different rotation amplitude adjustment gear slots 35. On the one hand, after the gear rib 12 is engaged with the rotation amplitude adjustment gear slot 35, the circumferential rotation of the outer nozzle 3 is restricted, ensuring that the inner nozzle 2 is stabilized in the corresponding gear state and avoiding automatic gear shifting. On the other hand, when the outer nozzle 3 is rotated to switch the gear rib 12 in different rotation amplitude adjustment gear slots 35, a sound similar to "click" can also be emitted to prompt the user that the gear adjustment process is in progress and to improve the rotation feel; as Figures 10 to 12 shown in Figure 3, when the outer nozzle 3 is rotated to engage the gear rib 12 with the unlocking gear slot 34, the inner nozzle 2 is completely unlocked and can reach the maximum rotation amplitude. The gear rib 12 is engaged in the unlocking gear slot 34 to restrict the circumferential rotation of the outer nozzle 3, ensuring that the inner nozzle 2 is stabilized in the fully unlocked state and avoiding automatic gear shifting. In addition, the outer nozzle 3 is also provided with a slide rail 31, and the nozzle base 1 is provided with a slide groove 11. The rotation of the outer nozzle 3 relative to the nozzle base 1 is guided by the cooperation of the slide rail 31 and the slide groove 11, ensuring that the outer nozzle 3 can rotate stably to adjust the rotation amplitude of the inner nozzle 2.

[0058] As a preferred embodiment, asFigure 8 , Figure 14 and Figure 15 As shown in Figure 8 , Figure 14 and Figure 15 , the air nozzle seat 1 is provided with an elastic part 13 capable of elastic deformation. The gear engaging rib 12 is arranged on the elastic part 13. The outer air nozzle 3 rotates circumferentially. The elastic part 13 is elastically deformed under the extrusion force, so that the gear engaging rib 12 can be engaged with or disengaged from the locking gear slot 33, a plurality of rotation amplitude adjustment gear slots 35 and the unlocking gear slot 34 respectively. Those skilled in the art can understand that the gear engaging rib 12 is arranged on the elastic part 13 of the air nozzle seat 1. The elastic part 13 is elastically deformed under the extrusion force, so that the gear engaging rib 12 can be engaged with or disengaged from the locking gear slot 33, a plurality of rotation amplitude adjustment gear slots 35 and the unlocking gear slot 34 respectively. Therefore, when the outer air nozzle 3 rotates, the elastic part 13 deforms inwardly under the pressure of the outer air nozzle 3 on the gear engaging rib 12, so that the gear engaging rib 12 can smoothly switch between the locking gear slot 33, a plurality of rotation amplitude adjustment gear slots 35 and the unlocking gear slot 34, effectively reducing the risk of the gear engaging rib 12 breaking. After the switching is completed, the elastic part 13 restores the deformation to ensure that the gear engaging rib 12 is stably engaged in the corresponding locking gear slot 33, rotation amplitude adjustment gear slot 35 or unlocking gear slot 34. In a preferred embodiment, the elastic part 13 can be designed as an elastic arm structure. At least one end of the elastic arm is connected to the outer wall of the air nozzle seat 1. There is a gap between the elastic arm and the outer side wall of the air nozzle seat 1. This gap enables the elastic arm to have the ability to deform towards the outer side wall of the air nozzle seat 1 when pressed.

[0059] As a preferred implementation manner, as Figure 5 , Figure 8 and Figure 9 shown, one end of the sliding groove 11 is provided with a stop part 14. The outer air nozzle 3 rotates in the first direction. The gear engaging rib 12 is engaged in the locking gear slot 33. The sliding rail 31 abuts against the stop part 14 to limit the outer air nozzle 3 from continuing to rotate circumferentially in the first direction. When the gear engaging rib 12 is engaged in the locking gear slot 33, the sliding rail 31 abuts against the stop part 14 to limit the outer air nozzle 3 from continuing to rotate circumferentially in the first direction. At this time, the engagement of the gear engaging rib 12 with the locking gear slot 33 and the abutment of the sliding rail 31 with the stop part 14 together limit the locking rib 32 and the stop convex rib 21 in the locked state of abutment, realizing double limiting and locking, ensuring that the locking rib 32 and the stop convex rib 21 are stably in the abutting state, and effectively improving the locking stability of the inner air nozzle 2.

[0060] Furthermore, as Figure 5 , Figure 8 , Figure 10 and Figure 12As shown, a limiting convex portion 36 is provided on the inner side wall of the outer air nozzle 3. The limiting convex portion 36 is arranged close to the unlocking gear slot 34. When the outer air nozzle 3 rotates in the second direction, the gear engaging rib 12 engages with the unlocking gear slot 34, and the limiting convex portion 36 abuts against the gear engaging rib 12 to limit the further rotation of the outer air nozzle 3 along the second direction. When the gear engaging rib 12 engages with the unlocking gear slot 34, the limiting convex portion 36 abuts against the gear engaging rib 12 to limit the further rotation of the outer air nozzle 3 along the second direction. At this time, the engagement of the gear engaging rib 12 with the unlocking gear slot 34 and the resistance against the limiting convex portion 36 together limit the stop convex rib 21 in a fully unlocked state, realizing double-limited unlocking and ensuring the stability of the maximum rotation amplitude of the inner air nozzle 2.

[0061] As a preferred embodiment, as Figure 5 and Figure 12 shown, the gear engaging rib 12 is provided at the edge on one side of the sliding groove 11. The locking gear slot 33, the plurality of rotation amplitude adjustment gear slots 35 and the unlocking gear slot 34 are arranged along the circumferential direction of the sliding rail 31. Through this design, only by rotating the outer air nozzle 3 in one direction, the gear engaging rib 12 can be sequentially changed from the position engaging with the unlocking gear slot 34 to the positions engaging with the plurality of rotation amplitude adjustment gear slots 35 and the locking gear slot 33. By rotating the outer air nozzle 3 in the opposite direction, the gear engaging rib 12 can be sequentially changed from the position engaging with the locking gear slot 33 to the positions engaging with the plurality of rotation amplitude adjustment gear slots 35 and the unlocking gear slot 34. The rotation directions of the outer air nozzle 3 are the aforementioned first direction and second direction that are opposite to each other.

[0062] As a preferred embodiment under this embodiment, as Figure 13 shown, Figure 13 the dotted lines in

[0063] are the central axes of the locking gear slot 33, the unlocking gear slot 34 and the rotation amplitude adjustment gear slot 35. The included angle between the central axis of the locking gear slot 33 and the central axis of the unlocking gear slot 34 is α, and α ≤ 30°. As described above, when the gear engaging rib 12 engages with the locking gear slot 33, the inner air nozzle 2 is in a locked state. When the gear engaging rib 12 engages with the unlocking gear slot 34, the inner air nozzle 2 is in a fully unlocked state. The included angle between the central axis of the locking gear slot 33 and the central axis of the unlocking gear slot 34 is α, and α ≤ 30°. That is, the rotation angles of the outer air nozzle 3 required for the locked state and the fully unlocked state of the inner air nozzle 2 are limited within 30°, ensuring that the outer air nozzle 3 realizes gear adjustment within a suitable rotation angle range, avoiding too small an angle range that makes the design space for the rotation amplitude adjustment gear slot 35 small and the design quantity too small, and also avoiding too large an angle range that increases the difficulty of rotating and adjusting the outer air nozzle 3. Figure 13As shown, the included angle between the central axes of two adjacent rotation amplitude adjustment gear slots 35 is β, where 1.5° ≤ β ≤ 6°. This allows for as many rotation amplitude adjustment gear slots 35 as possible to be set within the limited rotation range of the outer air nozzle 3, enhancing the adjustment position experience.

[0064] Specifically, taking the included angle α = 30° between the central axis of the locking gear slot 33 and the central axis of the unlocking gear slot 34, and the included angle β = 4° between the central axes of two adjacent rotation amplitude adjustment gear slots 35 as an example, 5 or 6 rotation amplitude adjustment gear slots 35 can be set between the locking gear slot 33 and the unlocking gear slot 34.

[0065] As a preferred implementation, as Figure 3 、 Figure 4 、 Figure 8 and Figure 9 shown, a rotating shaft 22 is provided on the inner side wall of the inner air nozzle 2, and the air nozzle base 1 is provided with a rotating hole 15 adapted to the rotating shaft 22. The inner air nozzle 2 is sleeved on one end of the air nozzle base 1, enabling the rotating shaft 22 and the rotating hole 15 to rotate in cooperation. A stop rib 21 is provided on the outer side wall of the inner air nozzle 2, and the rotating shaft 22 and the stop rib 21 are both provided on the same central symmetry plane of the inner air nozzle 2. Those skilled in the art can understand that when the locking rib 32 abuts against the stop rib 21 to lock the inner air nozzle 2, since the rotating shaft 22 and the stop rib 21 are both provided on the same central symmetry plane of the inner air nozzle 2, the stopping force generated by the locking rib 32 on the stop rib 21 is perpendicular to the central axis direction of the rotating shaft 22, and the effective force for the outer air nozzle 3 to restrict the rotation of the inner air nozzle 2 is the largest, which helps to improve the locking stability of the inner air nozzle 2. Preferably, symmetrically arranged rotating shafts 22 are provided at both ends of the inner side wall of the inner air nozzle 2, and symmetrically arranged stop ribs 21 can also be provided at both ends of the outer side wall of the inner air nozzle 2.

[0066] As a preferred implementation, as Figure 1 、 Figure 14 、 Figure 16 、 Figure 17 and Figure 18As shown in the figure, the nozzle assembly further includes a rectifying inner cover 4. The rectifying inner cover 4 is installed in the nozzle base 1. A rectifying channel is formed between the rectifying inner cover 4 and the inner wall of the nozzle base 1 to connect the air outlet of the body 5 of the hair dryer with the inner nozzle 2. The rectifying inner cover 4 is provided with a rotation guiding structure for guiding the rotation of the nozzle assembly relative to the body 5 of the hair dryer. By rectifying the air flow entering the nozzle assembly through the rectifying inner cover 4, the hot air or cold air blown out from the air outlet of the body 5 can be effectively guided to flow stably towards the inner nozzle 2. In a preferred embodiment, the rectifying inner cover 4 can be designed as a conical structure, with the conical apex facing the inner nozzle 2, to improve the rectifying and guiding effect. Specifically, the rotation guiding structure can be set as guiding ribs 41 extending along the circumferential direction of the rectifying inner cover 4, and guiding chutes 51 extending along the circumferential direction of the air outlet of the body 5 of the hair dryer are provided on the body 5 of the hair dryer. The nozzle assembly is guided to rotate relative to the body 5 by the sliding of the guiding ribs 41 in the guiding chutes 51. The rotation range of the nozzle assembly relative to the body 5 can be 90°, so that the nozzle assembly can swing and supply air at any angle between the vertical and horizontal directions and both, meeting the horizontal, vertical and inclined swing angles, and expanding the air supply range.

[0067] As a preferred embodiment, as Figure 1 and Figure 14 shown in the figure, the nozzle base 1 is circumferentially installed with a first magnetic member, and the body 5 of the hair dryer is provided with a second magnetic member magnetically matched with the first magnetic member. The nozzle assembly is magnetically matched with the body 5 through the first magnetic member and the second magnetic member, which improves the convenience of disassembly and assembly of the nozzle assembly. Moreover, for the technical solution in which the nozzle assembly can rotate relative to the body 5, the magnetic attraction method between the nozzle assembly and the body 5 is more convenient for the rotation of the nozzle assembly. Specifically, the first magnetic member can be a permanent magnet ring 6 installed along the circumferential direction of the nozzle base 1, and the second magnetic member can also be a permanent magnet ring installed along the circumferential direction of the air outlet of the body 5.

[0068] What is not described in this application can be realized by adopting or referring to the existing technologies.

[0069] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0070] The above are only the embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various modifications and changes. Any modifications, equivalent replacements, improvements, 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 nozzle assembly for a hair dryer, comprising a nozzle base, an inner nozzle rotatably mounted on the nozzle base, and an outer nozzle sleeved outside the nozzle base and the inner nozzle. A chute and a gear engaging rib are provided on the outer side wall of the nozzle base. A slide rail, a gear adjustment structure and a locking rib are provided on the side wall of the outer nozzle. The inner nozzle is provided with a stop rib cooperating with the locking rib to limit the rotation range of the inner nozzle. It is characterized in that, The shifting structure includes a locking gear slot, an unlocking gear slot, and a plurality of rotation amplitude adjustment gear slots provided between the locking gear slot and the unlocking gear slot. The outer air nozzle rotates circumferentially along the air nozzle seat through the cooperation of a chute and a slide rail. The gear engaging rib switches between the locking gear slot, the plurality of rotation amplitude adjustment gear slots, and the unlocking gear slot to adjust the distance between the locking rib and the stop rib so as to limit the rotation amplitude of the inner air nozzle.

2. The air nozzle assembly of the hair dryer according to claim 1, wherein the air nozzle seat is provided with an elastic part capable of elastic deformation. The gear engaging rib is arranged on the elastic part. The outer air nozzle rotates circumferentially. The elastic part is elastically deformed under the extrusion force, so that the gear engaging rib can be engaged with or disengaged from the locking gear slot, the plurality of rotation amplitude adjustment gear slots, and the unlocking gear slot respectively.

3. The air nozzle assembly of the hair dryer according to claim 1, wherein one end of the chute is provided with a stop part. The outer air nozzle rotates in the first direction. The gear engaging rib is engaged with the locking gear slot. The slide rail abuts against the stop part to limit the further circumferential rotation of the outer air nozzle in the first direction.

4. The air nozzle assembly of the hair dryer according to claim 3, wherein a limiting convex part is arranged on the inner side wall of the outer air nozzle. The limiting convex part is arranged close to the unlocking gear slot. The outer air nozzle rotates in the second direction. The gear engaging rib is engaged with the unlocking gear slot. The limiting convex part abuts against the gear engaging rib to limit the further rotation of the outer air nozzle in the second direction.

5. The air nozzle assembly of the hair dryer according to claim 1, wherein the gear engaging rib is arranged at the edge on one side of the chute. The locking gear slot, the plurality of rotation amplitude adjustment gear slots, and the unlocking gear slot are arranged circumferentially along the slide rail.

6. The air nozzle assembly of the hair dryer according to claim 5, wherein the included angle between the central axis of the locking gear slot and the central axis of the unlocking gear slot is α, and α ≤ 30°.

7. The air nozzle assembly of the hair dryer according to claim 5, wherein the included angle between the central axes of two adjacent rotation amplitude adjustment gear slots is β, and 1.5° ≤ β ≤ 6°.

8. The air nozzle assembly of the hair dryer according to claim 1, wherein a rotating shaft is arranged on the inner side wall of the inner air nozzle. The air nozzle seat is provided with a rotating hole adapted to the rotating shaft. The inner air nozzle is sleeved on one end of the air nozzle seat, so that the rotating shaft and the rotating hole are rotationally matched. The stop rib is arranged on the outer side wall of the inner air nozzle. The rotating shaft and the stop rib are arranged on the same central symmetry plane of the inner air nozzle.

9. The air nozzle assembly of the hair dryer according to claim 1, wherein the air nozzle assembly further includes a rectifying inner cover. The rectifying inner cover is installed in the air nozzle seat. A rectifying channel is formed between the rectifying inner cover and the inner wall of the air nozzle seat to connect the air outlet of the hair dryer body and the inner air nozzle. The rectifying inner cover is provided with a rotation guiding structure for guiding the rotation of the air nozzle assembly relative to the hair dryer body.

10. The air nozzle assembly of the hair dryer according to claim 1, wherein The nozzle base is circumferentially provided with a first magnetic member, and the body of the hair dryer is provided with a second magnetic member magnetically attracted and matched with the first magnetic member. The nozzle assembly is magnetically attracted and matched with the body through the first magnetic member and the second magnetic member.

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