IP Library › Granted Patent US 12687177
Granted Patent B2
US 12687177 · App. 18/983,623 · Granted Jul 21, 2026

Fan blade and neck fan

Inventors: Haibo Dong (Shenzhen, CN); Xiangyu Yang (Shenzhen, CN); Hui Liu (Shenzhen, CN)
Assignee: SHENZHEN SHIWU TECHNOLOGY CO., LTD.
F04D29/666F04D25/08F04D29/281F04D29/662
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12687177
App. No.
18/983,623
Granted
Jul 21, 2026
Kind
B2
Abstract

Provided are a fan blade and a neck fan. The fan blade comprises a base, a plurality of outer blades, and a plurality of inner blades. The base is generally circular and protrudes in the middle, including an annular outer disc, a connecting cylinder, and a circular inner disc. The outer disc is annularly arranged on the outside of the bottom end of the connecting cylinder, and the inner disc seals the top end of the connecting cylinder. The inner disc is used for connecting the output shaft of the driving mechanism. The outer blades are annularly arranged on the outside of the outer disc, and the inner blades are annularly arranged on the outside of the inner disc, so that both the outer blades and the inner blades are located on the same side of the base, and the outer blades and the inner blades are spaced apart.

Claims (27)

1 . A neck fan, comprising

a main body, a driving mechanism, and a fan blade;

wherein the fan blade comprises a base, a plurality of outer blades, and a plurality of inner blades;

wherein the base is circular and protrudes in the middle, including an annular outer disc, a connecting cylinder, and a circular inner disc, the outer disc is annularly arranged on an outside of a bottom end of the connecting cylinder, and the inner disc seals a top end of the connecting cylinder, and the inner disc is used for connecting an output shaft of the driving mechanism; and

the plurality of outer blades are annularly arranged on the outside of the outer disc, and the plurality of inner blades are annularly arranged on the outside of the inner disc, so that both the plurality of outer blades and the plurality of inner blades are located on the same side of the base, and the plurality of outer blades and the plurality of inner blades are spaced apart;

wherein the main body is U-shaped, both ends of the U-shaped main body are provided with air inlet chambers, a fan blade is placed in the air inlet chamber, the side of the main body facing outward is provided with an air inlet corresponding to the air inlet chamber, and the driving mechanism is installed in the connecting cylinder and is used for driving the fan blade to rotate; and

wherein the top of the plurality of outer blades is higher than the top of the connecting cylinder, and the top of the plurality of outer blades is flush with the top of the plurality of inner blades.

2 . The neck fan according to claim 1 , wherein

the plurality of outer blades are evenly spaced and distributed on the outer disc, and the plurality of inner blades are evenly distributed on the inner disc.

3 . The neck fan according to claim 1 , wherein

the number of the plurality of outer blades is greater than that of the plurality of inner blades, and the ratio of the number of the plurality of outer blades to the number of the plurality of inner blades ranges from 1.1 to 2.

4 . The neck fan according to claim 1 , wherein

both the plurality of outer blades and the plurality of inner blades are arc-shaped and curved in the same circumferential direction; the curvature of the plurality of outer blades is greater than that of the plurality of inner blades.

5 . The neck fan according to claim 1 , wherein

a part of the top of the side of the plurality of outer blades facing the inner disc is inclined downward, and the low point of the inclined side of the top of the plurality of outer blades is higher than the bottom of the plurality of inner blades.

6 . The neck fan according to claim 1 , wherein

a side of the outer disc facing the connecting cylinder is rising.

7 . The neck fan according to claim 1 , wherein

the main body is provided with an air outlet in the upward direction, and a wind tunnel is arranged below the air outlet;

and a section of the wind tunnel near the air inlet chamber is enlarged in the direction towards the air inlet chamber.

8 . A neck fan, comprising:

a main body, a driving mechanism, and a fan blade;

wherein the fan blade comprises a base, a plurality of outer blades, and a plurality of inner blades;

wherein the base is circular and protrudes in the middle, including an annular outer disc, a connecting cylinder, and a circular inner disc, the outer disc is annularly arranged on an outside of a bottom end of the connecting cylinder, and the inner disc seals a top end of the connecting cylinder, and the inner disc is used for connecting an output shaft of the driving mechanism; and

the plurality of outer blades are annularly arranged on the outside of the outer disc, and the plurality of inner blades are annularly arranged on the outside of the inner disc, so that both the plurality of outer blades and the plurality of inner blades are located on the same side of the base, and the plurality of outer blades and the plurality of inner blades are spaced apart;

wherein the main body is U-shaped, both ends of the U-shaped main body are provided with air inlet chambers, the fan blade is placed in the air inlet chamber, a side of the main body facing outward is provided with an air inlet corresponding to the air inlet chamber, and the driving mechanism is installed in the connecting cylinder and is used for driving the fan blade to rotate; and

the ratio of the height of the plurality of outer blades to the height of the plurality of inner blades is 4-6; and the ratio of the width of the plurality of outer blades to the width of the plurality of inner blades is 1.5-2.