Patent ID: 12234834

In the figures:10. fan shell;11. shell body;111. air guide component;1111. front segment;1112. middle segment;1113. rear segment;112. windward angle;113. cavity wall;114. positioning pin;115. air outlet hole;116. air outlet assembly;1161. fan cavity;1162. air duct;117. storage cavity;12. shell rear cover;13. decorative ring;14. decorative cover plate;15. control button;16. air window;20. silicone assembly;21. silicone sleeve;22. metal spring hose;23. fixing component;30. fan;40. energy storage battery;50. control unit;51. control mainboard;52. switch function board.

5. SPECIFIC EMBODIMENT OF THE INVENTION

Referring toFIG.1-6, the invention provides a technical solution of an ergonomic neck fan, comprising two fan shells10provided in mirror image for wearing around the neck of the user, and a silicone assembly20provided between the two fan shells10for connecting the two fan shells10together. The interior of each fan shell10is provided with a fan30and a cavity wall113. The inner side of the a-segment end of each fan shell10is provided with an air window16opposite to the fan30. Each fan shell10comprises a hollow shell body11and a shell rear cover12for clamping with the shell body11. The outer side wall of the shell rear cover12is provided with a decorative ring13, a decorative cover plate14and control buttons15. To facilitate easy operation of the neck fan, the control buttons15are provided on the shell rear cover12. The invention provides the decorative ring13and decorative cover plate14, so that after the control buttons15are assembled with the decorative ring13and decorative cover plate14, the neck fan can have an atmospheric appearance, comfortable hand-gripping, and flexible button-pressing.

The interior of each fan shell10is provides with an air guide component111, so that the air guide component111is installed inside the shell body11. The air guide component111cooperates with the cavity wall113to partition the interior space of the shell body11into an air outlet assembly116and a storage cavity117. The outer wall of the shell body11is provided with air outlet holes115. The aforementioned silicone assembly20is provided in an arc-shaped structure, and b-segment of each fan shell10together with the silicone assembly20surrounds the rear portion of a human neck. The aforementioned silicone assembly20is fixed to the fan shell10through a fixing component23, and the silicone assembly20is composed of a silicone sleeve21and a metal spring hose22. The metal spring hose22penetrates through the silicone sleeve21which has a hollow structure. The metal spring hose22can be arbitrarily bent and plastically deformed, and the silicone assembly20can be flexibly adjusted according to the neck thickness of different people for comfortable wearing without choking the neck. The fixing component23employs but is not limited to snaps or screws, so that the silicone assembly20can connect the two fan shells10together.

It should be noted that, according to the cylindrical characteristics of the human neck, the fan shell10and silicone assembly20are designed in the arc shape to surround the rear and sides of the human neck. According to the wider and uneven convex upper characteristics of the human shoulder, the fan shell10starts with a downward hanging design at the human clavicle and appropriately converges inward towards the center of the human chest. The storage cavity117inside the downward hanging a-segment of the fan shell10holds the control unit50and energy storage battery40of the fan, with the entire gravity of the fan pointing downwards to the lowest end of fan30, providing the most stable wearing experience for the human body. The fan shell10starts to hang down at the human clavicle and slightly converges towards the midpoint of the human chest. The angle formed between the arc-shaped plane of the shell body11around the neck and the downward hanging a-segment plane of the fan shell10is 140 degrees, fitting the structure of the human shoulder. The air outlet holes115at the downward hanging a-segment of the fan shell10blow towards the human face, and the air outlet holes115at the arc-shaped b-segment of the fan shell10blows towards the human neck.

In this embodiment, in conjunction withFIG.5andFIG.6, the air outlet assembly116comprises a fan cavity1161for accommodating fan30, and a horn-shaped air duct1162. The fan cavity1161is connected to the air duct1162. The air duct1162communicates with the air outlet hole115. The air duct1162is formed by the air guide component111cooperating with the shell body11. The air guide component111consists of a front segment1111, a middle segment1112, and a rear segment1113, and is provided in an irregular Z-shaped three-segment structure. The front segment1111of the air guide component111intersects with the cavity wall113, and the intersection forms a windward angle112of 50 to 80 degrees. The front segment1111of the air guide component111is perpendicular to the air duct1162to form the second section of the air duct1162. The front segment1111of the air guide component111is connected to the cavity wall113. The middle segment1112of the air guide component111forms a cross-sectional area of the air duct1162formed by the fan shell10that gradually decreases. The rear segment1113of the air guide component111forms an angle of 100 to 150 degrees with the middle segment1112of the air guide component111. The angle between the rear segment1113and the middle segment1112of the air guide component111is 125 to 140 degrees. The air outlet holes115start to be continuously provided along the top surface of the second section of the air duct1162towards the tail of the air duct1162. The air outlet hole115has a rounded rectangular structure with the outline dividing lines between the air outlet hole115and the fan shell10forming equally spaced angles of 65 to 85 degrees on the top surface of the air duct1162and the side surface of the shell body11. Preferably, in this embodiment, the angle between the rear segment1113and the middle segment1112of the air guide component111is 130 degrees, and the vertex of the angle has a rounded-angle structure, that is, the angle is treated with a large fillet of radius 15 mm, so that the accelerated airflow generated by the compressed air in the second section of the air duct1162can smoothly enter the third section of the air duct1162and reach the end of the air duct1162through the aforementioned large fillet treated angle, providing stronger airflow for the air outlet holes115surrounding the neck.

It should be noted that, a positioning pin114is provided on the downward extended line of the middle segment1112of the air guide component111. The positioning pin114is provided on the storage cavity117, and the fan30is provided on the downward extended line of the middle segment1112and proximate to the side of the windward angle112. Wherein, the fan30adopts but is not limited to a centrifugal fan, the air window16is an air window with a segmented pie profile, and the air window16is provided on the lower circular hole of the fan shell10using a snap-fit structure. The diameter of the air window16is equal to the blade size of the fan30to ensure maximum air intake while preventing foreign objects from being sucked into the fan30and affecting normal operation and use of the neck fan. The rear segment1113of the air guide component111is smoothly connected to the middle segment1112, and gradually converges to the tail of the fan shell10. The air is compressed and accelerated in the second section of the air duct1162, and can continuously flow to the end of the air duct1162, achieving relatively strong airflow discharged from the air outlet holes115along the way and blowing to both sides of the human neck. Wherein, the middle segment1112of the air guide component111is lifted upward to form an angle of about 160 degrees with the front segment1111of the air guide component111, and the cross-section of the air duct1162formed by the fan shell10gradually contracts and decreases. The second section of the air duct1162guides the airflow to transmit upwards, so that part of the air is discharged from the top surface air outlet holes115of the second section of the air duct1162and blows to the human face, while the airflow speed of the compressed air increases and accelerates into the third section of the air duct1162, ensuring that there is still sufficient strong airflow discharged from the tail of the air duct1162to blow to the human neck.

Wherein, in this embodiment, the windward angle112is provided for reducing the noise generated by high-speed airflow in the air duct1162. The included angle of the windward angle112is 60 to 70 degrees, and the vertex of the windward angle112has an inverted rounded-angle structure, that is, the front segment1111of the air guide component111intersects with the cavity wall113of the fan30, and forms a windward angle112of 65 degrees with the tangent of the intersection, in order to reduce the noise formed by the impact of high-speed airflow on the windward angle112, the vertex of the windward angle112is treated with an inverted fillet of 0.5 mm. Wherein, the flared air duct1162is formed by the front segment1111of the air guide component111and the air duct1162of the fan shell10, which appears flared from bottom to top, thereby slowing down the impact of high-speed airflow entering the air duct1162on the air guide component111and reducing noise. Wherein, the middle segment1112of the air guide component111is lifted upwards to change the airflow direction, allowing part of the airflow to be discharged from the air outlet holes115in this part and blow to the human face. The cross-section of the air duct1162formed by the middle segment1112of the air guide component111and the fan shell10gradually decreases. According to aerodynamics, that is, the Bernoulli's principle, the airflow velocity entering the second section of the air duct1162will increase due to channel narrowing and air compression.

In this embodiment, the ergonomic neck fan further comprises an energy storage battery40and a control unit50provided inside the fan shell10. The a-segment of the fan shell10starts from the human clavicle and hangs down along the shoulder. The two a-segments of the fan shells10converge towards the center of the human chest, and the cavity of a-segment gradually enlarges to accommodate the fan30, the energy storage battery40and the control unit50. Both the energy storage battery40and the control unit50are provided in the storage cavity117. The control unit50consists of a control mainboard51and a switch function board52. The switch function board52is connected to the control buttons15. The control mainboard51is provided on the positioning pin114in the storage cavity117, and adopts Type-C charging to complete the state indication and battery control of the neck fan. The control wires of the energy storage battery40and the fan30pass through the metal spring hose22to achieve synchronous control of the fan30in the neck fan. Wherein, the energy storage battery40adopts but is not limited to a cylindrical battery or a block polymer battery. When installing the energy storage battery40, sufficient space needs to be reserved in the internal storage cavity117of the shell body11. Wherein, the wires of the fan30and energy storage battery40can be hidden and pass through the hollow metal spring hose22to enable the control unit50to control the left and right fans of the neck fan.

The air outlet holes115of the ergonomic neck fan are provided to blow the airflow generated by the fan30towards the human face and neck. The air outlet holes115are designed to comply with the airflow direction and can also guide the discharge direction of the airflow. Air outlet holes115are continuously provided along the top surface of the second section of the air duct1162towards the tail of the air duct1162. In this embodiment, twenty-seven air outlet holes115can be provided from large to small. The air outlet holes115have a rounded rectangular structure with the outline dividing lines between the air outlet holes115and the fan shell10forming equally spaced angles of 65-85 degrees on the top surface of the air duct1162and the side surface of the shell body11. Wherein, the shell body11is made of 2.0 mm plastic material, with the 2.0 mm thickness of the plastic shell body11, the hole walls of the air outlet holes115form air passageways. The airflow passageways of the second section of the air duct1162are perpendicular to the front segment1111of the air guide component111to ensure that the airflow in the second section of the air duct1162can be partially discharged upwards to blow to the human face.

It should be noted that, in this novel ergonomic neck fan, the front segment1111of the air guide component111is about 1.5 cm long and is connected to the cavity wall113of the fan30, forming an angle of about 135 degrees with the middle segment1112of the air guide component111at the connection. The front segment1111of the air guide component111forms the first section of the air duct1162with the fan shell10. The first section of the air duct1162is connected to the fan cavity1161, following the direction of the high-speed airflow transferred from the fan cavity1161. Wherein, the positioning pin114of the fan30is located on the downward extended line of the middle segment1112of the air guide component111. The fan30is provided on this extended line close to the side of the windward angle112, with the minimum distance of 1 mm from the cavity wall113of the fan30, and the maximum distance of 6.5 to 7.0 mm from the cavity wall113of the fan30. After installation of the fan30, the entire fan cavity1161forms a spiral cavity. The fan30drives the air entering the fan cavity1161through the air window16to be accelerated and injected into the air duct1162. The minimum gap at the windward angle112ensures that the minimum amount of air enters the secondary cycle. The fan30rotates in the fan cavity1161to form high-speed airflow and inject it into the air duct1162. The air duct1162meets the aerodynamic requirements to keep the high-speed transmission of airflow in the air duct1162, and blow out from the air outlet holes115towards the face and both sides of the neck of the human body at a relatively high wind speed. Wherein, the fan30is fixed on the positioning pin114to form a spiral cavity.