Handheld Fan
A handheld fan comprises a mesh grid assembly, a motor, and fan blades, wherein the mesh grid assembly comprises a front mesh component and a rear mesh component, the front mesh component and the rear mesh component are fixedly combined with each other, at least one portion of the front mesh component extends in a direction away from the rear mesh component, and at least one portion of the rear mesh component extends in a direction away from the front mesh component; the motor is accommodated between the front mesh component and the rear mesh component, and the motor drives the fan blades to rotate between the front mesh component and the rear mesh component.
This application claims the benefit of priority from China Patent Application No. 2023236668392 filed on Dec. 31, 2023, the contents of which are hereby incorporated by reference in their entirety.
TECHNICAL FIELDThe present invention relates to the technical field of household electrical appliances, in particular to a handheld fan.
BACKGROUND TECHNOLOGYWith the development of related technologies such as battery technology, motor miniaturization, circuit integration, and mold precision, the miniaturization of some household appliances has become possible. Among these, various forms of portable fans, including handheld fans, outdoor fans, folding fans, and neck-mounted fans, are important embodiments of the miniaturization of household appliances.
Existing handheld fans typically include front grilles, rear grilles, motors, and fan blades. The front grilles and rear grilles are fixed together as single units, with the motors housed between them (usually with the rear grilles serving as bases to secure the motors). The fan blades are connected to the motors' shafts to generate airflow. In most cases, end portions of the front and rear grilles are connected to handles for easy holding, which can also house batteries.
However, the existing handheld fans still face at least following technical issues:
I. In the existing technology, spokes of the front grilles usually extend in straight lines or are curved radially. Consequently, external profiles of the front grilles appear to be roughly flat, which compresses the space for housing motors and fan blades. Limited by this confined space, existing handheld fans cannot consider utilizing larger motors with better performance (which typically have larger volumes) and fan blades with superior fluid dynamics (which also tend to be larger), resulting in suboptimal airflow performance.
II. In the existing handheld fans, the front grilles and rear grilles generally cannot rotate relative to handles, or can only make small-angle rotations relative to handles, which makes the airflow angle of the handheld fan non-adjustable or only allows for minimal adjustments.
In summary, how to further optimize the fluid dynamics performance and mechanical characteristics of handheld fans has become an urgent problem that needs to be addressed.
SUMMARY OF THE INVENTIONThe purpose of the present invention is to provide a handheld fan that has better fluid dynamics performance and mechanical characteristics.
To achieve the above objectives, the present invention offers following technical solutions: a handheld fan, at least comprises a mesh grid assembly, a motor, and fan blades, wherein the mesh grid assembly comprises a front mesh component and a rear mesh component, the front mesh component and the rear mesh component are fixedly combined with each other, at least one portion of the front mesh component extends in a direction away from the rear mesh component, and at least one portion of the rear mesh component extends in a direction away from the front mesh component; and the motor is accommodated between the front mesh component and the rear mesh component, and the motor drives the fan blades to rotate between the front mesh component and the rear mesh component.
In the above technical solutions, the front mesh component comprises a front mesh ring frame, front mesh spokes and a front mesh central support arranged in sequence from outside to inside, the front mesh spokes extend in both a radial direction and an axial direction of the front mesh component, so that the front mesh ring frame and the front mesh central support are in mutual misalignment in the axial direction; the rear mesh component comprises a rear mesh ring frame, rear mesh spokes and a motor base arranged in sequence from outside to inside, and the rear mesh spokes extend in both a radial direction and an axial direction of the rear mesh component, so that the rear mesh ring frame and the motor base are in mutual misalignment in the axial direction; the front mesh ring frame of the front mesh component and the rear mesh ring frame of the rear mesh component are fixedly combined with each other, so that the front mesh component and the rear mesh component are fixedly combined with each other; and the motor is fixed on the motor base of the rear mesh component.
In the above technical solutions, the front mesh spokes of the front mesh component extend from the front mesh ring frame to the front mesh central support along an arc path; and the rear mesh spokes of the rear mesh component extend from the rear mesh ring frame to the motor base along an arc path.
In the above technical solutions, an axial section of the front mesh component comprises the front mesh spokes which are arc-shaped, and an center angle α of the front mesh spokes comprises 70° to 80°.
In the above technical solutions, an axial section of the rear mesh component comprises the rear mesh spokes which are arc-shaped, and a central angle β of the rear mesh spokes comprises 70° to 80°.
In the above technical solutions, the motor comprises an outer rotor motor; the fan blades comprise a central support hub, and the central support hub is provided with fan blade bodies distributed along a circumferential direction thereof; and the central support hub of the fan blades are sleeved on an outer rotor of the motor.
In the above technical solutions, an outer diameter of the central support hub is D1 and an outer diameter of the fan blade bodies is D2, and D1: D2=0.5-0.6.
In the above technical solutions, a distance between adjacent blade bodies is L and an outer diameter of the blade bodies is D2, and L: D2=0.3-0.4.
In the above technical solutions, the handheld fan further comprises a handle assembly, wherein the handle assembly comprises a handheld portion and a pivot arm connected to one end of the handheld portion; the mesh grid assembly is pivotally connected to the pivot arm of the handle assembly, so that the mesh grid assembly, the motor and the fan blades all swing in pitch and/or horizontally relative to the handle assembly.
In the above technical solutions, the handle assembly further comprises a functional ring; the functional ring is pivoted to another end of the handheld portion relative to the pivot arm, and the functional ring is able to be rotated and positioned relative to the handheld portion; and/or, the functional ring comprises a first arm, and a second arm pivoted to the first arm; when the second arm is pressed, the second arm rotates relative to the first arm, so that the functional ring is an open ring shape; and when pressure on the second arm is removed, the second arm is reset, so that the functional ring is in a closed ring shape.
In the above technical solutions, inside the front mesh central support of the front mesh component or the motor base of the rear mesh component is provided at least one lighting module.
Compared to the prior art, the present invention has following beneficial effects: in the handheld fan of the present invention, at least one portion of the front mesh component extends in a direction away from the rear mesh component, and at least one portion of the rear mesh component extends in a direction away from the front mesh component, so that the mesh assembly obtains a larger volume of accommodating space to configure a motor with better performance and fan blades with better fluid mechanics performance; in addition, the mesh grid assembly, the motor and the fan blades all pitch and swing and/or swing horizontally relative to the handle assembly, so that the handheld fan of the present invention has a wider air outlet angle.
The markups in the drawings are indicates as follows:
-
- 1—mesh grid assembly;
- 11—front mesh component;
- 111—front mesh ring frame;
- 112—front mesh spoke;
- 113—front mesh central support;
- 12—rear mesh component;
- 121—rear mesh ring frame;
- 122—rear mesh spoke;
- 123—motor base;
- 124—rear cover;
- 125—button;
- 126—wiring groove cover;
- 2—handle assembly;
- 21—handheld portion;
- 22—pivot arm;
- 23—functional ring;
- 24—elastic piece;
- 25—pressure piece;
- 3—motor;
- 4—fan blade;
- 41—central support hub;
- 42—blade body;
- 5—main control circuit board;
- 51—switch;
- 52—charging port;
- 6—battery; and
- 7—lighting module.
The following will be combined with the drawings in embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
Please refer to
The mesh grid assembly 1 comprises a front mesh component 11 and a rear mesh component 12, the front mesh component 11 and the rear mesh component 12 are both integrally injection-molded engineering plastic material components; the front mesh component 11 and the rear mesh component 12 are fixedly combined with each other, which specifically can be fixedly combined with each other by means of buckles or screws, at least one portion of the front mesh component 11 extends in a direction away from the rear mesh component 12, and at least one portion of the rear mesh component 12 extends in a direction away from the front mesh component 11.
The motor 3 is accommodated between the front mesh component 11 and the rear mesh component 12, and the motor 3 drives the fan blades 4 to rotate between the front mesh component 11 and the rear mesh component 12.
Specifically, the front mesh component 11 comprises a front mesh ring frame 111, front mesh spokes 112 and a front mesh central support 113, arranged in sequence from outside to inside, that is, the front mesh ring frame 111, the front mesh spokes 112 and the front mesh central support 113 are arranged in sequence from outside to inside along a radial direction of the front mesh component 11, and are integrally injection molded, the front mesh spokes 112 extend in both a radial direction and an axial direction of the front mesh component 11, so that the front mesh ring frame 111 and the front mesh central support 113 are in mutual misalignment in the axial direction; the rear mesh component 12 comprises a rear mesh ring frame 121, rear mesh spokes 122 and a motor base 123 arranged in sequence from outside to inside, that is, the rear mesh ring frame 121, the rear mesh spokes 122 and the motor base 123 are arranged in sequence from outside to inside along a radial direction of the rear mesh component 12, and are integrally injection molded with each other, wherein the motor base 123 forms accommodation spaces on both the inner and outer sides of the rear mesh component 12; and the rear mesh spokes 122 extend in both a radial direction and an axial direction of the rear mesh component 12, so that the rear mesh ring frame 121 and the motor base 123 are in mutual misalignment in the axial direction; the front mesh ring frame 111 of the front mesh component 11 and the rear mesh ring frame 121 of the rear mesh component 12 are fixedly combined with each other, so that the front mesh component 11 and the rear mesh component 12 are fixedly combined with each other; in the present embodiment, the front mesh ring frame 111 of the front mesh component 11 and the rear mesh ring frame 121 of the rear mesh component 12 are fixedly connected to each other by buckles; and the motor 3 is fixed on the motor base 123 of the rear mesh component 12, for example, the motor 3 may be fixed to the motor base 123 by snapping or screwing.
Further, specifically the front mesh spokes 112 of the front mesh component 11 extend from the front mesh ring frame 111 to the front mesh central support 113 along an arc path, so that the front mesh spokes 112 extend in both the radial direction of the front mesh component 11 and the axial direction of the front mesh component 11; and the rear mesh spokes 122 of the rear mesh component 12 extend from the rear mesh ring frame 121 to the motor base 123 along an arc path, so that the rear mesh spokes 122 extend both in the radial direction of the rear mesh component 12 and in the axial direction of the rear mesh component 12.
Please refer to
Please refer to
Further, the motor 3 comprises an outer rotor motor, that is, a rotating portion of the motor 3 is an outer annular surface thereof; the fan blades 4 comprise a central support hub 41, which is wheel hub-shaped and the central support hub 41 is provided with fan blade bodies 42 distributed along a circumferential direction thereof, in fact, the blade bodies 42 and the central support hub 41 are integrally formed to form the fan blades 4, and root portions of the blade body 42 are connected to the central support hub 41; and the central support hub 41 of the fan blades 4 are sleeved on an outer rotor of the motor 3, and specifically, the two are interference fit or key connected.
Please refer to
By reasonably setting the ratio of the outer diameter D1 of the central support hub 41 and the outer diameter D2 of the blade bodies 42, the weight of the fan blades 4 is evenly distributed, thereby improving the dynamic balance performance of the fan blades 4 and avoiding radial pulling of the shaft of the motor 3 due to inertia when the fan blades 4 rotate; in addition, the air outlet area of the blade bodies 42 can be reasonably adjusted to make users feel comfortable.
Please refer to
If the distance between the blade bodies 42 is too small, it will cause airflow disturbance, increase the friction on the surface of the blade bodies 42, and reduce the air outlet efficiency; if the distance between the blade bodies 42 is too large, it will cause increased pressure loss and insufficient wind pressure; by reasonably setting the spacing between the blade bodies 42, the air outlet effect of the fan blades 4 can be improved.
Please refer to
Specifically, in the present embodiment, the pivot arm 22 is integrally formed with the handheld portion 21, and two pivot arms 22 are arranged in a forked shape, so that the handle assembly 2 roughly forms a “γ” shape; rotating shafts are formed on both sides of the front mesh component 11 and the rear mesh component 12 of the mesh assembly 1, and rotating shaft seats are provided on inner sides of the pivot arm 22, the mesh grid assembly 1 is pivoted to the pivot arm 22 of the handle assembly 2 through the cooperation of the rotating shafts and the rotating shaft seats. In the present embodiment, the mesh grid assembly 1, the motor 3 and the fan blades 4 can all pitch and swing relative to the handle assembly 2.
It shall be noted that the handheld fan of the present invention further comprises a battery 6, which is a rechargeable lithium battery. The battery 6 is accommodated and fixed in the handheld portion 21 of the handle assembly 2; the handheld fan of the present embodiment further comprises a main control circuit board 5, on which a main control is mounted, the main control circuit board 5 is accommodated and fixed in a portion of the motor base 123 outside the rear mesh component 12; the motor 3 and the battery 6 are electrically connected to the main control circuit board 5 respectively, wherein wires of the motor 3 pass through a bottom plate of the motor base 123 to be connected to the main control circuit board 5; for the battery 6, it is routed from inner sides of the handheld portion 21 and the pivot arm 22 of the handle assembly 2, and the wires pass out from the rotating shaft seats to the outside of the handle assembly 2, and then pass from the rotating shaft to the mesh grid assembly 1, and the rear mesh component 12 of the mesh grid assembly 1 comprises wiring grooves formed between two rear mesh spokes 122, and the wires are routed from the wiring grooves until being connected to the main control circuit board 5 in the motor base 123, and in addition, surfaces of the wiring grooves are also covered with wiring groove covers 126 to protect the wires.
It shall be noted that the motor base 123 is covered with a rear cover 124 on an outer side of the rear mesh component 12 to cover the main control circuit board 5; the main control circuit board 5 is equipped with a switch 51, and a button 125 is embedded in the rear cover 124. The button 125 on the rear cover 124 is aligned with the switch 51 on the main control circuit board 5. Pressing the button 125 can trigger the switch 51, thereby realizing the power on/off and wind speed adjustment functions; the main control circuit board 5 is also equipped with a charging port 52, which passes through the rear cover 124 to charge the battery 6 through an external power adapter.
Further, the handle assembly 2 further comprises a functional ring 23 which is a metal buckle; the functional ring 23 is pivoted to another end of the handheld portion 21 relative to the pivot arm 22, and the functional ring 23 is able to be rotated and positioned relative to the handheld portion 21; in the present embodiment, elastic pieces 24 and pressure pieces 25 are provided in the handheld portion 21 of the handle assembly 2. The pressure pieces 25 are fixed to the handheld portion 21 of the handle assembly 2 and presses elastic pieces 24, so that the elastic pieces 24 are also forced to press the functional ring 23, thereby creating a strong friction force between the elastic pieces 24 and the functional ring 23, thereby achieving the positioning of the functional ring 23.
Further, specifically, the functional ring 23 comprises a first arm 231, and a second arm 232 pivoted to the first arm; when the second arm 232 is pressed, the second arm 232 rotates relative to the first arm 231, so that the functional ring 23 is an open ring shape; and when pressure on the second arm 232 is removed, the second arm 232 is reset, so that the functional ring 23 is in a closed ring shape. In fact, the first arm 231 is an arc-shaped metal component with a larger central angle, and the second arm 232 is an arc-shaped metal component with a smaller central angle. The two are spliced to form a complete circle. Pivot shafts and torsion springs are provided between the first arm 231 and the second arm 232 to realize the rotation and resetting of the second arm 232 relative to the first arm 231.
When the functional ring 23 is rotated to a horizontal angle, the handle assembly 2 is propped up so that the entire handheld fan can be used standing on a desktop; in addition, when the functional ring 23 is open, objects (such as hooks or key rings) can be hooked or clamped into the functional ring 23, and then the pressure on the second arm 232 is removed to close the functional ring 23, and the functional ring 23 can be hung on the objects, making it convenient to place, fix and carry the handheld fan of the present embodiment; in addition, a lanyard can also be hung on the functional ring 23 to facilitate carrying the handheld fan.
Further, inside the front mesh central support 113 of the front mesh component 11 or the motor base 123 of the rear mesh component 12 is provided at least one lighting module 7, in the present embodiment, the at least one lighting module 7 is provided with circuit boards with LED lamp beads, electrically connected to the main control circuit board 5 to obtain power supply, wherein if the at least one lighting module 7 is arranged inside the front mesh central support 113 of the front mesh component 11, a receiving cavity is arranged inside the front mesh central support 113 to accommodate the at least one lighting module 7, and the front mesh component 11 or at least the front mesh central support 113 is set to be transparent, or a cover plate is added to the front mesh central support 113; and if the at least one lighting module 7 is arranged inside the motor base 123 of the rear mesh component 12, then the at least one lighting module 7 is additionally arranged inside the button 125, and the button 125 is set to be transparent.
In the handheld fan of the present embodiment, at least a portion of the front mesh component 11 extends in a direction away from the rear mesh component 12, and at least a portion of the rear mesh component 12 extends in a direction away from the front mesh component 11, so that the mesh assembly 1 can obtain a larger volume of accommodating space to configure the motor 3 with better performance and the fan blades 4 with better fluid mechanics performance; in addition, the mesh grid assembly 1, the motor 3 and the fan blades 4 can all pitch and swing and/or swing horizontally relative to the handle assembly 2, so that the handheld fan of the present embodiment has a wider air outlet angle.
Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A handheld fan, at least comprising a mesh grid assembly, a motor, and fan blades, wherein
- the mesh grid assembly comprises a front mesh component and a rear mesh component, the front mesh component and the rear mesh component are fixedly combined with each other, at least one portion of the front mesh component extends in a direction away from the rear mesh component, and at least one portion of the rear mesh component extends in a direction away from the front mesh component; and
- the motor is accommodated between the front mesh component and the rear mesh component, and the motor drives the fan blades to rotate between the front mesh component and the rear mesh component.
2. The handheld fan according to claim 1, wherein the front mesh component comprises a front mesh ring frame, front mesh spokes and a front mesh central support arranged in sequence from outside to inside, the front mesh spokes extend in both a radial direction and an axial direction of the front mesh component, so that the front mesh ring frame and the front mesh central support are in mutual misalignment in the axial direction;
- the rear mesh component comprises a rear mesh ring frame, rear mesh spokes and a motor base arranged in sequence from outside to inside, and the rear mesh spokes extend in both a radial direction and an axial direction of the rear mesh component, so that the rear mesh ring frame and the motor base are in mutual misalignment in the axial direction;
- the front mesh ring frame of the front mesh component and the rear mesh ring frame of the rear mesh component are fixedly combined with each other, so that the front mesh component and the rear mesh component are fixedly combined with each other; and
- the motor is fixed on the motor base of the rear mesh component.
3. The handheld fan according to claim 2, wherein the front mesh spokes of the front mesh component extend from the front mesh ring frame to the front mesh central support along an arc path; and
- the rear mesh spokes of the rear mesh component extend from the rear mesh ring frame to the motor base along an arc path.
4. The handheld fan according to claim 3, wherein an axial section of the front mesh component comprises the front mesh spokes which are arc-shaped, and an center angle α of the front mesh spokes comprises 70° to 80°.
5. The handheld fan according to claim 3, wherein an axial section of the rear mesh component comprises the rear mesh spokes which are arc-shaped, and a central angle β of the rear mesh spokes comprises 70° to 80°.
6. The handheld fan according to claim 1, wherein the motor comprises an outer rotor motor;
- the fan blades comprise a central support hub, and the central support hub is provided with fan blade bodies distributed along a circumferential direction thereof; and
- the central support hub of the fan blades are sleeved on an outer rotor of the motor.
7. The handheld fan according to claim 6, wherein an outer diameter of the central support hub is D1 and an outer diameter of the fan blade bodies is D2, and D1: D2=0.5-0.6.
8. The handheld fan according to claim 6, wherein a distance between adjacent blade bodies is L and an outer diameter of the blade bodies is D2, and L: D2=0.3-0.4.
9. The handheld fan according to claim 1, further comprises a handle assembly, wherein the handle assembly comprises a handheld portion and a pivot arm connected to one end of the handheld portion; and
- the mesh grid assembly is pivotally connected to the pivot arm of the handle assembly, so that the mesh grid assembly, the motor and the fan blades all swing in pitch and/or horizontally relative to the handle assembly.
10. The handheld fan according to claim 9, wherein the handle assembly further comprises a functional ring;
- the functional ring is pivoted to another end of the handheld portion relative to the pivot arm, and the functional ring is able to be rotated and positioned relative to the handheld portion; and/or,
- the functional ring comprises a first arm, and a second arm pivoted to the first arm;
- when the second arm is pressed, the second arm rotates relative to the first arm, so that the functional ring is an open ring shape; and
- when pressure on the second arm is removed, the second arm is reset, so that the functional ring is in a closed ring shape.
11. The handheld fan according to claim 2, wherein inside the front mesh central support of the front mesh component or the motor base of the rear mesh component is provided at least one lighting module.
12. The handheld fan according to claim 4, wherein an axial section of the rear mesh component comprises the rear mesh spokes which are arc-shaped, and a central angle β of the rear mesh spokes comprises 70° to 80°.
13. The handheld fan according to claim 7, wherein a distance between adjacent blade bodies is L and an outer diameter of the blade bodies is D2, and L: D2=0.3-0.4.
Type: Application
Filed: Oct 4, 2024
Publication Date: Jul 3, 2025
Applicant: Shenzhen Youwei Technology Co., Ltd (Shenzhen)
Inventors: Xuegang TAN (Shenzhen), Jie LIN (Shenzhen)
Application Number: 18/907,157