An electric fan for a hair dryer

Abstract

The utility model discloses an electric fan of hair drier, including cylinder, air duct, rotor subassembly, stator subassembly and impeller, the radial outside of air duct and the inner surface of cylinder are matched, and rotor subassembly and stator subassembly are installed in the inside of air duct, and rotor subassembly and stator subassembly relatively rotate, and impeller and rotor subassembly coaxial connection, one end of cylinder has the coaxial first convex ring, and the other end has the coaxial second convex ring, and the radial outer surface of first convex ring and second convex ring is matched with the inner surface of casing to form the buffer cavity between the radial outer surface of cylinder and the inner surface of casing, and the radial outer surface of cylinder has the coaxial third convex ring, and second convex ring is located in the buffer cavity, and the diameter of third convex ring is less than the diameter of first convex ring and second convex ring. The utility model has the buffering function, can absorb the impact energy when falling or hitting.

Description

Technical Field

[0001] This utility model relates to the technical field of electric fans, and in particular to an electric fan for a hair dryer. Background Technology

[0002] Hair dryers, as a common personal care device, typically consist of a motor-driven fan structure as their core power component. Traditional hair dryers generally use a rigid connection for the fan assembly, with the fan housing tightly fitted to the internal cavity of the hair dryer, and the fan impeller directly coupled to the motor output shaft.

[0003] When a hair dryer is accidentally dropped or impacted, the impact energy can be easily transmitted to the motor and fan assembly due to the large contact area between the fan assembly housing and the inside of the hair dryer. The motor and fan assembly may be damaged, deformed, or displaced, causing rotor dynamic imbalance. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electric fan for a hair dryer, which has a cushioning function and can absorb the impact energy during drops or collisions.

[0005] According to an embodiment of the present invention, a hair dryer has a housing, and the electric fan is installed inside the housing. The hair dryer is characterized by comprising a cylindrical body, a blower casing, a rotor assembly, a stator assembly, and an impeller. The radial outer surface of the blower casing matches the inner surface of the cylindrical body. The rotor assembly and the stator assembly are installed inside the blower casing and rotate relative to each other. The impeller and the rotor assembly are coaxially connected. One end of the cylindrical body has a coaxial first convex ring, and the other end has a coaxial second convex ring. The radial outer surfaces of the first and second convex rings engage with the inner surface of the housing to form a buffer cavity between the radial outer surface of the cylindrical body and the inner surface of the housing. The radial outer surface of the cylindrical body has a coaxial third convex ring located within the buffer cavity, and the diameter of the third convex ring is smaller than the diameters of the first and second convex rings.

[0006] The electric fan of a hair dryer according to an embodiment of the present utility model has at least the following beneficial effects:

[0007] 1. By setting a first convex ring and a second convex ring, the radial outer surface area of ​​the first convex ring and the second convex ring is small, which reduces the contact area between the housing and the cylinder. Furthermore, a buffer cavity is formed between the radial outer surface of the cylinder, the first convex ring, the second convex ring and the housing. The buffer cavity can effectively absorb the impact energy during a drop or impact, prevent the impact force from being transmitted to the internal motor and fan assembly, reduce damage and deformation to the motor and impeller, and avoid rotor dynamic imbalance.

[0008] 2. By setting a third convex ring, the diameter of which is smaller than that of the two end convex rings, the third convex ring can form a buffer structure, enhance the impact resistance, further prevent rotor dynamic imbalance, and improve the durability of the electric fan.

[0009] According to an embodiment of the present invention, the electric fan of a hair dryer has a triangular cross-section for the third convex ring.

[0010] According to an embodiment of the present invention, a hair dryer fan is provided with a first convex ring having a plurality of protrusions, the plurality of protrusions being arranged circumferentially along the first convex ring, and the protrusions protruding along the axis of the cylinder and away from the impeller.

[0011] According to an embodiment of the present invention, the protrusion of a hair dryer has a serrated structure.

[0012] According to an embodiment of the present invention, the electric fan of a hair dryer has a cylindrical body made of silicone material.

[0013] According to an embodiment of the present invention, a fan for a hair dryer includes a rotor assembly having a rotating shaft, an impeller mounted on the rotating shaft, the impeller being located inside the air duct and disposed near the first convex ring.

[0014] According to an embodiment of the present invention, a fan for a hair dryer is provided inside the air tube, the inside of the mounting sleeve is matched with the rotating shaft, and a plurality of air channels are formed between the outer surface and the inner surface of the mounting sleeve, the air channels allowing fluid generated by the impeller to pass through.

[0015] According to an embodiment of the present invention, a hair dryer fan has a plurality of spiral plates between the mounting sleeve and the mounting sleeve, and the air duct is formed between two adjacent spiral plates.

[0016] According to an embodiment of the present invention, a hair dryer fan has two bearings and a spring located between the two bearings on the outer surface of the rotating shaft, and the bearings are installed inside the mounting sleeve.

[0017] According to an embodiment of the present invention, the stator assembly of a hair dryer has a terminal block connected to its end, and the terminal block is provided with a socket.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the electric fan in a hair dryer according to an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 An exploded view of the electric fan in a hair dryer is shown;

[0022] Figure 3 for Figure 1 A cross-sectional view of the electric fan in a hair dryer is shown.

[0023] Reference numerals: 100-casing, 110-cylinder, 120-air duct, 130-rotor assembly, 140-stator assembly, 150-impeller, 160-first convex ring, 170-second convex ring, 180-third convex ring, 190-protrusion, 200-shaft, 210-mounting sleeve, 220-spiral plate, 230-bearing, 240-spring, 250-connecting board, 260-socket. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The electric fan of a hair dryer according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0029] Reference Figure 1 The present invention aims to provide an embodiment of an electric fan for a hair dryer.

[0030] An electric fan for a hair dryer according to an embodiment of this utility model, referring to... Figure 1 , Figure 2 and Figure 3 The hair dryer has a housing 100, and an electric fan is installed inside the housing 100. The electric fan includes a cylinder 110, a blower 120, a rotor assembly 130, a stator assembly 140, and an impeller 150. The radial outer surface of the blower 120 matches the inner surface of the cylinder 110. The rotor assembly 130 and the stator assembly 140 are installed inside the blower 120 and rotate relative to each other. The impeller 150 and the rotor assembly 130 are coaxially connected.

[0031] One end of the cylinder 110 has a coaxial first convex ring 160, and the other end has a coaxial second convex ring 170. The radial outer surfaces of the first convex ring 160 and the second convex ring 170 are engaged with the inner surface of the housing 100 to form a buffer cavity between the radial outer surface of the cylinder 110 and the inner surface of the housing 100.

[0032] It is understood that by setting the first convex ring 160 and the second convex ring 170, the radial outer surface area of ​​the first convex ring 160 and the second convex ring 170 is small, which reduces the contact area between the housing 100 and the cylinder 110. Furthermore, a buffer cavity is formed between the radial outer surface of the cylinder 110, the first convex ring 160, the second convex ring 170 and the housing 100. The buffer cavity can effectively absorb the impact energy during a drop or impact, prevent the impact force from being transmitted to the internal motor and fan assembly, reduce damage and deformation to the motor and impeller 150, and avoid rotor dynamic imbalance.

[0033] The outer radial surface of the cylinder 110 has a coaxial third convex ring 180, which is located in the buffer cavity, and the diameter of the third convex ring 180 is smaller than the diameter of the first convex ring 160 and the second convex ring 170.

[0034] It is understood that by setting a third convex ring 180, the diameter of which is smaller than that of the two end convex rings, the third convex ring 180 can form a buffer structure, enhance the impact resistance, further prevent rotor dynamic imbalance, and improve the durability of the electric fan.

[0035] In some embodiments of this utility model, the cylinder 110 is made of silicone. It is understood that silicone has both high elasticity and damping properties, and can absorb high-frequency vibration and low-frequency impact.

[0036] In some embodiments of this utility model, the cross-section of the third convex ring 180 is triangular.

[0037] It is understandable that the third convex ring 180 of the triangular cross section has a gradually changing structure. During the process of receiving impact force, the buffering force of the third convex ring 180 continuously increases, which is more conducive to the absorption of impact force.

[0038] In some embodiments of this utility model, reference is made to Figure 3 The first convex ring 160 is provided with a plurality of protrusions 190, which are arranged circumferentially along the first convex ring 160. The protrusions 190 protrude along the axis of the cylinder 110 and away from the impeller 150. It can be understood that the protrusions 190 abut against the end of the housing 100. The circumferentially distributed protrusions 190 form multi-point elastic support, disperse the impact force distribution, and improve the axial impact resistance.

[0039] In some embodiments of this utility model, the protrusion 190 has a sawtooth structure, making the protrusion 190 a gradual structure. The buffering force of the protrusion 190 increases continuously during the process of receiving impact force, which is more conducive to the absorption of impact force.

[0040] In some embodiments of this utility model, the rotor assembly 130 has a rotating shaft 200, an impeller 150 is mounted on the rotating shaft 200, the impeller 150 is located inside the air duct 120 and is set close to the first convex ring 160. Therefore, the vibration generated during the rotation of the impeller 150 can be absorbed by the first convex ring 160, reducing the vibration generated when the blower is working.

[0041] In some embodiments of this utility model, an installation sleeve 210 is provided inside the air duct 120. The interior of the installation sleeve 210 matches the rotating shaft 200. Multiple air ducts are formed between the outer surface and the inner surface of the installation sleeve 210. The air ducts allow the fluid generated by the impeller 150 to pass through. It can be understood that when the airflow generated by the impeller 150 passes through the air duct, the air duct achieves airflow rectification and reduces turbulence noise.

[0042] In some embodiments of this utility model, there are multiple spiral plates 220 between the mounting sleeve 210 and the mounting sleeve 210, and an air duct is formed between two adjacent spiral plates 220.

[0043] It is understandable that the spiral duct formed by the spiral plate 220 generates rotating airflow, which enhances the centrifugal pressurization effect.

[0044] In some embodiments of this utility model, two bearings 230 and a spring 240 are sleeved on the outer surface of the rotating shaft 200. The bearings 230 are installed inside the mounting sleeve 210 to ensure the stability of the rotation of the rotating shaft 200.

[0045] In some embodiments of this utility model, a terminal block 250 is connected to the end of the stator assembly 140, and the terminal block 250 is provided with a socket 260. Therefore, the modular design of the socket 260 facilitates quick assembly and maintenance.

[0046] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An electric fan of a hair dryer, the hair dryer having a casing (100) in which the electric fan is installed, characterized by, The device includes a cylinder (110), a duct (120), a rotor assembly (130), a stator assembly (140), and an impeller (150). The radial outer surface of the duct (120) matches the inner surface of the cylinder (110). The rotor assembly (130) and the stator assembly (140) are installed inside the duct (120) and rotate relative to each other. The impeller (150) and the rotor assembly (130) are coaxially connected. One end of the cylinder (110) has a coaxial first convex ring (160), and the other end has a coaxial second convex ring (170). The radial outer surfaces of the first convex ring (160) and the second convex ring (170) cooperate with the inner surface of the housing (100) to form a buffer cavity between the radial outer surface of the cylinder (110) and the inner surface of the housing (100). The outer radial surface of the cylinder (110) has a coaxial third convex ring (180), which is located in the buffer cavity, and the diameter of the third convex ring (180) is smaller than the diameters of the first convex ring (160) and the second convex ring (170).

2. An electric fan for a hair dryer according to claim 1, wherein The cross-section of the third convex ring (180) is triangular.

3. An electric fan for a hair dryer according to claim 1, wherein The first convex ring (160) is provided with a plurality of protrusions (190), which are arranged circumferentially along the first convex ring (160). The protrusions (190) protrude along the axis of the cylinder (110) and away from the impeller (150).

4. An electric fan for a hair dryer according to claim 3, wherein The protrusion (190) has a serrated structure.

5. An electric fan for a hair dryer according to claim 1, wherein The cylinder (110) is made of silicone.

6. The electric fan in a hair dryer according to claim 1, characterized in that, The rotor assembly (130) has a shaft (200), the impeller (150) is mounted on the shaft (200), the impeller (150) is located inside the air duct (120) and is positioned close to the first convex ring (160).

7. An electric fan for a hair dryer according to claim 6, wherein The air duct (120) is provided with an installation sleeve (210) inside, the interior of which matches the rotating shaft (200). Multiple air ducts are formed between the outer surface and the inner surface of the installation sleeve (210), and the air ducts allow the fluid generated by the impeller (150) to pass through.

8. An electric fan for a hair dryer according to claim 7, wherein The mounting sleeve (210) has a plurality of spiral plates (220) between it, and the air duct is formed between two adjacent spiral plates (220).

9. An electric fan for a hair dryer according to claim 8, wherein Two bearings (230) are sleeved on the outer surface of the rotating shaft (200), and a spring (240) is located between the two bearings (230). The bearings (230) are installed inside the mounting sleeve (210).

10. An electric fan for a hair dryer according to claim 1, wherein The stator assembly (140) is connected to a terminal block (250) at its end, and the terminal block (250) is provided with a socket (260).

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