Portable fan

Abstract

The utility model discloses a portable fan which comprises a shell, fan blades and a motor, an air outlet channel is arranged in the shell, the fan blades are rotatably arranged in the air outlet channel, a motor fixing part is arranged in the shell, the motor is installed on the motor fixing part, the fan blades comprise hubs and blades arranged on the outer sides of the hubs, and the blades are arranged on the outer sides of the hubs. A motor groove is concavely formed in the surface of the hub in the axial direction of the fan blades, the motor is installed in the motor groove and is in transmission connection with the fan blades, and at least part of the portion, corresponding to the fan blades, of the shell is transparent. According to the portable fan, the transparent part is arranged at the position, corresponding to the fan blades, of the shell, so that a user can see the fan blades located in the air outlet channel through the transparent part, the user can conveniently observe the dirt condition of the fan blades in real time, the user can conveniently clean the fan blades in time, and the air outlet amount, the air outlet quality and the use willingness of the user are not affected; and when a user sees that foreign matters enter the air outlet channel through the transparent part, the foreign matters can be cleaned in time, so that the fan blades are prevented from being damaged by the foreign matters.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a portable fan. Background Technology

[0002] In the hot summer, portable fans can provide ventilation for users in outdoor or office settings, overcoming the limitations of large fans and making them very popular. However, after a period of use, the fan blades of portable fans tend to get dirty. Dirty blades not only affect the airflow volume but also the air quality, which may harm the user's health.

[0003] However, portable fans are usually small in size for easy carrying, with small blades, air outlets, and air inlets. Furthermore, air inlets and outlets are usually equipped with grilles, and the blades are located inside the casing, making it difficult for users to clearly observe the degree of dirt on the blades and not know when to clean them. Moreover, not knowing the degree of dirt on the blades may reduce users' willingness to use portable fans. Utility Model Content

[0004] In view of this, the present invention provides a portable fan to solve the problem that existing portable fans cannot observe the dirt on the fan blades.

[0005] This application provides a portable fan, including a housing, fan blades, and a motor. The housing has an air outlet channel inside, and the fan blades are rotatably disposed in the air outlet channel. The housing has a motor fixing part, and the motor is mounted in the motor fixing part. The fan blades include a hub and blades disposed outside the hub. The surface of the hub is recessed along the axial direction of the fan blades to form a motor groove. The motor is mounted in the motor groove and is drivenly connected to the fan blades. At least part of the portion of the housing corresponding to the fan blades is transparent.

[0006] In some embodiments, the transparent portion surrounds the outer periphery of the fan blade.

[0007] In some embodiments, the length of the transparent portion is greater than the length of the fan blade along its axial direction.

[0008] In some embodiments, the housing includes a first housing portion and a second housing portion connected to one side of the first housing portion, wherein the first housing portion is a non-transparent portion, the transparent portion is disposed in the second housing portion, and the fan blade is located inside the second housing portion.

[0009] In some embodiments, both the first shell portion and the second shell portion are cylindrical, the first shell portion and the second shell portion are coaxially arranged, and the air outlet channel passes through the first shell portion and the second shell portion along the axial direction of the fan blade.

[0010] In some embodiments, both the first shell portion and the second shell portion are annular, and the end of the second shell portion near the first shell portion is recessed from the outer surface to form an embedding portion, and the end of the first shell portion near the second shell portion is recessed from the inner surface to form an embedding groove, and the embedding portion is inserted into the embedding groove.

[0011] In some embodiments, one of the embedding portion and the embedding groove is provided with a limiting protrusion and the other is provided with a corresponding limiting groove. The limiting protrusion is inserted into the limiting groove to keep the first shell portion and the second shell portion relatively fixed in the circumferential direction.

[0012] In some embodiments, the housing further includes a protective shell, which is fitted over the outside of the first housing portion and the second housing portion, and at least the portion of the protective shell corresponding to the second housing portion is a transparent area.

[0013] In some embodiments, the protective shell includes a surrounding wall sleeved on the outside of the first shell portion and the second shell portion, and an air inlet grille connected to one end of the surrounding wall. The shell also includes a snap-fit ​​member that engages with the end of the surrounding wall away from the air inlet grille. The first shell portion and the second shell portion are located between the snap-fit ​​member and the air inlet grille.

[0014] In some embodiments, a grip portion is also included, which is connected to the housing.

[0015] Compared with the prior art, the portable fan provided by this utility model has at least the following beneficial effects:

[0016] By providing a transparent section on the housing corresponding to the fan blades, users can see the fan blades inside the air outlet channel through the transparent section. This allows users to observe the dirt status of the fan blades in real time, making it convenient for them to clean the fan blades in a timely manner. This prevents the portable fan from affecting the air volume, air quality, and user preference. Moreover, if the user sees foreign objects entering the air outlet channel through the transparent section, they can also clean them in time to avoid damage to the fan blades. The motor is installed inside the hub, improving the overall structural compactness, reducing the size, and preventing the motor from being exposed and affecting the observation of the fan blades. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a portable fan provided in an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A cross-sectional view of the portable fan shown;

[0019] Figure 3 for Figure 1 An exploded view of the portable fan shown;

[0020] Figure 4 for Figure 3 The diagram shows an exploded view of the motor and fan blades.

[0021] Figure 5 for Figure 3 An exploded view of the first and second shell portions shown in the diagram;

[0022] Figure 6 for Figure 5 The diagram shows the first and second shells from another perspective.

[0023] In the diagram: 10. Portable fan; 12. Housing; 14. Fan blades; 16. Motor; 18. Air outlet; 20. Air inlet; 22. Air outlet; 24. Grip; 28. Battery; 30. Control buttons; 32. Hub; 33. Motor slot; 34. Blades; 35. Transparent part; 36. First housing part; 38. Second housing part; 40. Motor mount; 42. Connecting rib; 44. Air outlet grille; 46. Mounting base; 48. Circuit board; 50. End cap; 52. Embedded part; 54. Embedded groove; 56. Limiting protrusion; 58. Limiting groove; 60. Protective shell; 62. Enclosure; 64. Air inlet grille; 66. Snap-fit ​​component. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, inside, outside, top, bottom, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, the component may be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it may be directly connected to the other component or there may be an intervening component present.

[0027] Please see Figures 1 to 6A portable fan 10 provided in one embodiment of the present invention includes a housing 12, a fan blade 14, and a motor 16. An air outlet channel 18 is provided inside the housing 12, and the fan blade 14 is rotatably disposed in the air outlet channel 18. A motor fixing part is provided inside the housing 12, and the motor 16 is installed in the motor fixing part. The fan blade 14 includes a hub 32 and blades 34 disposed outside the hub 32. A motor groove 33 is recessed on the surface of the hub 32 along the axial direction of the fan blade 14. The motor 16 is installed in the motor groove 33 and is connected to the fan blade 14 for transmission, so as to drive the fan blade 14 to rotate in the air outlet channel 18, thereby generating airflow flowing in the air outlet channel 18.

[0028] The housing 12 is provided with an air inlet 20 and an air outlet 22 that are respectively connected to the air outlet channel 18. When the motor 16 drives the fan blade 14 to rotate, the outside air enters the air outlet channel 18 through the air inlet 20 and flows towards the air outlet 22 under the drive of the fan blade 14, and finally blows out from the air outlet 22, giving the user a cooling effect.

[0029] Optionally, the fan blade 14 is an axial flow fan blade 14, with its air inlet and outlet directions both along the axial direction of the fan blade 14, the air outlet channel 18 extending along the axial direction of the fan blade 14, and the air inlet 20 and the air outlet 22 located on both sides of the axial direction of the fan blade 14, respectively.

[0030] The specific type of portable fan 10 is not limited, such as handheld fan, neck fan, etc. In this embodiment, the portable fan 10 is a handheld fan. The handheld fan includes a grip 24 and a housing 12 connected to one end of the grip 24. The grip 24 is cylindrical so that the user can hold it.

[0031] The grip 24 houses a battery 28, which is electrically connected to the motor 16, providing the necessary power for the motor 16 to operate. The portable fan 10 has its own power supply, eliminating the need for an external power source and making it convenient for users.

[0032] The grip 24 is equipped with control buttons 30, which allow users to control the start / stop and power of the motor 16 by pressing the control buttons 30.

[0033] The fan blade 14 includes a hub 32 and blades 34 disposed on the outer side of the hub 32. A motor groove 33 is formed by recessing the surface of the hub 32 along the axial direction of the fan blade 14. That is, the axial side surface of the hub 32 is recessed to form the motor groove 33. The motor 16 is installed in the motor groove 33 and is driven to the hub 32 to realize the drive connection between the motor 16 and the fan blade 14. Installing the motor 16 in the motor groove 33 inside the hub 32 not only enhances the compactness of the structure and reduces the space occupied by the motor 16 and the fan blade 14 inside the housing 12, but also avoids the motor 16 being exposed, preventing the motor 16 from affecting the observation of the dirt condition of the fan blade 14.

[0034] There are multiple blades 34, which are arranged at intervals along the circumference of the hub 32 and are inclined relative to the axial direction of the hub 32. The multiple blades 34 and the hub 32 can be connected separately or integrally formed to ensure the connection strength between the blades 34 and the hub 32, while eliminating the assembly process.

[0035] In one embodiment, at least part of the portion of the housing 12 corresponding to the fan blade 14 is a transparent portion 35. The user can see the fan blade 14 located in the air outlet channel 18 through the transparent portion 35, so that the user can observe the dirt status of the fan blade 14 in real time and clean the fan blade 14 in time to avoid affecting the air volume, air quality and user willingness to use the portable fan 10. Moreover, when the user sees foreign objects entering the air outlet channel 18 through the transparent portion 35, the foreign objects can be cleaned in time to avoid damage to the fan blade 14 caused by foreign objects.

[0036] Optionally, the housing 12 is partially transparent (35) and partially non-transparent (35). The fan blade 14 is positioned corresponding to the transparent portion 35 to expose the fan blade 14, while components that do not need to be exposed, such as the circuit board 48, can be placed inside the non-transparent portion 35 to avoid excessive exposed components affecting the observation of the dirt condition of the fan blade 14. It should be noted that "exposed" means that it can be seen by the user, not that it is exposed on the surface of the portable fan 10.

[0037] Preferably, the transparent portion 35 surrounds the outer periphery of the fan blade 14, allowing users to observe the dirt status of the fan blade 14 from different angles.

[0038] Along the axial direction of the fan blade 14, the length of the transparent portion 35 is greater than the length of the fan blade 14, and the two ends of the fan blade 14 are located between the two ends of the transparent portion 35, so that the entire fan blade 14 is located inside the transparent portion 35, allowing the user to observe the dirt on the entire outer surface of the fan blade 14 through the transparent portion 35.

[0039] In one embodiment, the housing 12 includes a first housing portion 36 and a second housing portion 38 connected to one side of the first housing portion 36. The first housing portion 36 and the second housing portion 38 are in communication with each other. The air outlet channel 18 is located inside the first housing portion 36 and the second housing portion 38. The two sides of the first housing portion 36 and the second housing portion 38 that are far apart are used for air inlet and air outlet, respectively.

[0040] The first housing portion 36 is a non-transparent portion 35, and the transparent portion 35 is located in the second housing portion 38. The fan blade 14 is located inside the second housing portion 38. By setting the housing 12 into two parts, transparent and non-transparent, the fan blade 14 that needs to be exposed can be installed in the transparent portion 35, i.e., the second housing portion 38, while components that do not need to be exposed, such as the circuit board 48, can be installed in the non-transparent portion 35, i.e., the first housing portion 36, to prevent too many components from being exposed and affecting the observation of the dirt condition of the fan blade 14.

[0041] The transparent portion 35 is provided on the second shell portion 38. This can mean that the entire second shell portion 38 is transparent, or it can mean that a portion of the second shell portion 38 corresponding to the fan blade 14 is transparent. In this embodiment, the entire second shell portion 38 is transparent. The entire second shell portion 38 can be made of the same transparent material, for example, by injection molding, which helps to reduce production difficulty.

[0042] The second housing 38 is provided with a motor base 40 at one end near the first housing 36. The motor base 40 is installed on the inner side of the second housing 38 by a connecting rib 42. The motor base 40 constitutes a motor fixing part. The motor 16 is fixedly installed on the side of the motor base 40 away from the first housing 36 to support the motor 16 and the fan blade 14.

[0043] There are multiple connecting ribs 42, which are arranged at intervals along the circumference of the motor base 40. Airflow can pass through the channels between adjacent connecting ribs 42. Both the connecting ribs 42 and the blades 34 are inclined relative to the axis of the fan blades 14, and the inclination direction of the connecting ribs 42 relative to the axis is opposite to that of the fan blades 14 relative to the axis. When the airflow passes through the blades 34, it flows in the direction of inclination relative to the axis under the action of the blades 34. Since the inclination direction of the connecting ribs 42 is opposite to that of the blades 34, after the airflow moves to the connecting ribs 42, the connecting ribs 42 can correct the airflow, so that the airflow is blown out along the axis of the fan blades 14 as much as possible, so that the user can control the airflow direction.

[0044] An air outlet grille 44 is provided on the inner side of the first housing 36. The grille holes on the air outlet grille 44 form an air outlet 22. A mounting base 46 is formed in the middle of the air outlet grille 44. A circuit board 48 is provided on the mounting base 46, and the motor 16 is electrically connected to the circuit board 48. The motor base 40 is located between the mounting base 46 and the fan blade 14, which can reduce the distance between the motor 16 and the circuit board 48, and facilitate the connection between the motor 16 and the circuit board 48. At the same time, the circuit board 48 is located inside the first housing 36, and the first housing 36 is a non-transparent part 35, which can prevent the circuit board 48 from being exposed.

[0045] An end cover 50 is provided on the side of the mounting base 46 away from the motor base 40. The circuit board 48 is located between the end cover 50 and the mounting base 46 to protect the circuit board 48. During the assembly process, the circuit board 48 can be installed onto the mounting base 46 first, and then the end cover 50 can be installed onto the mounting base 46 to cover the circuit board 48.

[0046] In one embodiment, both the first shell portion 36 and the second shell portion 38 are annular. The end of the second shell portion 38 near the first shell portion 36 is recessed inward from its outer surface to form an insert portion 52. The end of the first shell portion 36 near the second shell portion 38 is recessed outward from its inner surface to form an insert groove 54. The insert portion 52 is inserted into the insert groove 54, keeping the first shell portion 36 and the second shell portion 38 relatively fixed in the radial direction. Since the first shell portion 36 is opaque (35) and the second shell portion 38 is transparent (35), inserting the second shell portion 38 into the first shell portion 36, compared to inserting the first shell portion 36 into the second shell portion 38, prevents the portion of the first shell portion 36 inserted into the second shell portion 38 from being exposed and affecting the observation of the fan blade 14. Simultaneously, only the transparent second shell portion 38 and the opaque first shell portion 36 are visible externally; the insert groove 54 and the insert portion 52 connecting the first shell portion 36 and the second shell portion 38 are not visible, enhancing the product's aesthetics. Meanwhile, the first shell portion 36 is recessed from the outside to the inside to form an insert portion 52, and the second shell portion 38 is recessed from the inside to the outside to form an insert groove 54, so that the insertion fit of the first shell portion 36 and the second shell portion 38 is tighter, and the surface of the first shell portion 36 and the second shell portion 38 is smoother after they are assembled together.

[0047] Optionally, both the first housing portion 36 and the second housing portion 38 are cylindrical. The first housing portion 36 and the second housing portion 38 are coaxially arranged, and the air outlet channel 18 passes through the first housing portion 36 and the second housing portion 38 along the axial direction of the fan blade 14 to reduce the air resistance in the air outlet channel 18. The second housing portion 38 is a transparent portion 35. By setting it to a cylindrical shape, the transparent portion 35 can surround the outer periphery of the fan blade 14, so that the user can observe the dirt status of the fan blade 14 from different angles.

[0048] The embedding part 52 and the embedding groove 54 each have a limiting protrusion 56 and a corresponding limiting groove 58. The limiting protrusion 56 is inserted into the limiting groove 58 to keep the first shell part 36 and the second shell part 38 relatively fixed in the circumferential direction, preventing relative rotation between the first shell part 36 and the second shell part 38. In this embodiment, the limiting protrusion 56 is located on the outer side of the embedding part 52, and the limiting groove 58 is located on the inner wall of the embedding groove 54. After the embedding part 52 is inserted into the embedding groove 54, the limiting protrusion 56 is inserted into the limiting groove 58, so that the first shell part 36 and the second shell part 38 are relatively fixed in both the radial and circumferential directions.

[0049] The limiting groove 58 extends radially to the outside of the first housing portion 36 so that the limiting groove 58 can be aligned with the limiting protrusion 56 during assembly, reducing assembly difficulty.

[0050] In one embodiment, the housing 12 further includes a protective shell 60, which is sleeved on the outside of the first housing portion 36 and the second housing portion 38. The housing 12 is mounted to the grip portion 24 via the protective shell 60. At least the portion of the protective shell 60 corresponding to the second housing portion 38 is a transparent area. The protective shell 60 can protect the first housing portion 36 and the second housing portion 38 without affecting the user's observation of the dirt condition of the fan blade 14. Optionally, the entire protective shell 60 is made of transparent material.

[0051] The protective shell 60 includes a wall 62 and an air inlet grille 64 connected to one end of the wall 62. The wall 62 is fitted on the outside of the first shell portion 36 and the second shell portion 38. The air inlet grille 64 is located on the side of the second shell portion 38 away from the first shell portion 36. The grille holes on the air inlet grille 64 form an air inlet 20.

[0052] The housing 12 also includes a snap-fit ​​member 66 located on the side of the first housing portion 36 away from the second housing portion 38. The snap-fit ​​member 66 engages with the end of the enclosure 62 away from the air inlet grille 64 and clamps the first housing portion 36 and the second housing portion 38 between the snap-fit ​​member 66 and the air inlet grille 64, thereby creating a limiting effect on the first housing portion 36 and the second housing portion 38 in the axial direction.

[0053] The snap-fit ​​part 66 is provided with a snap-fit ​​part, and the end of the enclosure 62 away from the air inlet grille 64 is provided with a snap-fit ​​groove. The snap-fit ​​part is inserted into the snap-fit ​​groove so that the snap-fit ​​part 66 and the enclosure 62 snap-fit ​​together.

[0054] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A portable fan, characterized in that, The device includes a housing, fan blades, and a motor. The housing has an air outlet channel inside, and the fan blades are rotatably disposed in the air outlet channel. The housing also has a motor mounting part, and the motor is mounted on the motor mounting part. The fan blades include a hub and blades disposed outside the hub. The surface of the hub is recessed along the axial direction of the fan blades to form a motor groove. The motor is mounted to the motor groove and is connected to the fan blades for transmission. At least part of the portion of the housing corresponding to the fan blades is transparent. The housing includes a first housing portion and a second housing portion connected to one side of the first housing portion. The first housing portion is a non-transparent portion, and the transparent portion is disposed in the second housing portion. The fan blade is located inside the second housing portion. A motor mount is provided at one end of the second housing portion near the first housing portion. The motor mount constitutes a motor fixing portion, and the motor is mounted to the motor mount.

2. The portable fan according to claim 1, characterized in that, The transparent portion surrounds the outer periphery of the fan blade.

3. The portable fan according to claim 2, characterized in that, Along the axial direction of the fan blade, the length of the transparent portion is greater than the length of the fan blade.

4. The portable fan according to claim 1, characterized in that, Both the first shell and the second shell are cylindrical, and the first shell and the second shell are coaxially arranged. The air outlet channel passes through the first shell and the second shell along the axial direction of the fan blade.

5. The portable fan according to claim 1, characterized in that, Both the first shell portion and the second shell portion are annular. The end of the second shell portion near the first shell portion is recessed from the outer surface inward to form an embedding portion. The end of the first shell portion near the second shell portion is recessed from the inner surface outward to form an embedding groove. The embedding portion is inserted into the embedding groove.

6. The portable fan according to claim 5, characterized in that, The embedding part and the embedding groove are provided with a limiting protrusion on one side and a corresponding limiting groove on the other side. The limiting protrusion is inserted into the limiting groove so that the first shell part and the second shell part are kept relatively fixed in the circumferential direction.

7. The portable fan according to any one of claims 1-6, characterized in that, The housing also includes a protective shell, which is fitted over the outside of the first housing portion and the second housing portion, and at least the portion of the protective shell corresponding to the second housing portion is a transparent area.

8. The portable fan according to claim 7, characterized in that, The protective shell includes a surrounding wall sleeved on the outside of the first shell portion and the second shell portion, and an air inlet grille connected to one end of the surrounding wall. The shell also includes a snap-fit ​​component, which engages with the end of the surrounding wall away from the air inlet grille. The first shell portion and the second shell portion are located between the snap-fit ​​component and the air inlet grille.

9. The portable fan according to claim 1, characterized in that, It also includes a grip portion, which is connected to the housing.

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