Hula hoop based on aerodynamics

Abstract

The utility model relates to the technical field of hula hoops, in particular to an aerodynamics-based hula hoop which comprises a hula hoop body, flow guide fins are evenly distributed on the outer side of the hula hoop body, large protruding points and small protruding points are evenly and alternately distributed on the inner side of the hula hoop body, the flow guide fins reduce rotation resistance through aerodynamics design, and the flow guide fins are evenly distributed on the outer side of the hula hoop body. The centrosymmetric layout ensures the stability of the gravity center and prevents the convex points from influencing balance during massage, and meanwhile, during rotation, the flow guide fins can guide airflow during rotation of the hula hoop, improve the rotation smoothness, generate auxiliary propulsive force and reduce the physical output of a user. The flow guide fins are combined with the large protruding points and the small protruding points to generate pulse type massage of'wave back pushing ', the large protruding points and the small protruding points make contact with the waist and the abdomen when the hula hoop rotates, difference is generated through different protruding distances of the large protruding points and the small protruding points, friction force between the hula hoop and the waist and the abdomen is increased through differential contact, and slipping is prevented.

Description

Technical Field

[0001] This utility model relates to the field of hula hoop technology, and in particular to an aerodynamic hula hoop. Background Technology

[0002] A hula hoop is a classic fitness device, typically made of plastic, rubber, or lightweight metal in a ring shape. It works the core muscles, improves coordination, and burns calories by rotating and swinging around the waist or limbs.

[0003] However, traditional hula hoops have significant shortcomings in terms of air resistance, movement stability, and massage effect, which limit their exercise efficiency and user experience. This is mainly because traditional hula hoops are mostly smooth circular structures, which have high air resistance when rotating, requiring users to exert force frequently to maintain rotation, which can easily lead to fatigue. Furthermore, they do not take aerodynamic optimization into account. In addition, ordinary hula hoops rely on a single friction surface to contact the waist and abdomen, and are prone to losing balance and falling off when rotating at high speeds due to centrifugal force. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of traditional hula hoops, which are mostly smooth circular structures with high air resistance during rotation, requiring users to exert frequent force to maintain rotation and causing fatigue. Furthermore, these hoops do not consider aerodynamic optimization. Therefore, this invention proposes an aerodynamic-based hula hoop.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an aerodynamic hula hoop, comprising: a hula hoop, wherein multiple guide fins are evenly distributed on the outer side of the hula hoop, and large and small protrusions are evenly and alternately distributed on the inner side of the hula hoop.

[0006] As a further embodiment of this utility model, the length of the guide fin is 35.5cm, and the protruding part of the guide fin is 2cm.

[0007] As a further embodiment of this utility model, the hula hoop has an outer diameter of 90cm and an inner diameter of 80cm.

[0008] As a further embodiment of this utility model, the diameter of the large protrusion is 6.75cm, and the diameter of the small protrusion is 4cm.

[0009] As a further embodiment of this invention, the distance from the most prominent point of the large convex point to the inner diameter of the hula hoop is 1.2cm.

[0010] As a further embodiment of this invention, the distance from the most prominent point of the small convex point to the inner diameter of the hula hoop is 0.7cm.

[0011] The aerodynamic hula hoop proposed in this utility model has the following advantages:

[0012] 1. The aerodynamic design reduces rotational resistance, and the centrally symmetrical layout ensures a stable center of gravity, avoiding the impact of protruding points on balance during massage. At the same time, the guide fins can guide airflow when the hula hoop rotates, improving the smoothness of rotation and generating auxiliary propulsion force to reduce the user's physical exertion. The combination of the guide fins and large and small protruding points produces a pulse-like massage similar to "wave back push".

[0013] 2. When the hula hoop rotates, the large and small protruding points come into contact with the waist and abdomen. The different protrusion distances of the large and small protruding points create a difference, which increases the friction between the hula hoop and the waist and abdomen, preventing slippage. At the same time, it avoids the discomfort caused by uniform pressure. Furthermore, the protruding points stimulate the muscles of the waist and abdomen through local pressure changes, greatly improving the shaping efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the hula hoop proposed in this utility model.

[0015] In the picture: 1. Hula hoop; 2. Guide fin; 3. Large protruding point; 4. Small protruding point. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0018] An aerodynamic hula hoop includes: a hula hoop 1, with multiple evenly distributed airflow guide fins 2 on the outer side of the hula hoop 1. The length of the airflow guide fins 2 is 35.5cm, and the protruding part of the airflow guide fins 2 is 2cm. The aerodynamic design reduces rotational resistance, and the centrally symmetrical layout ensures the stability of the center of gravity, avoiding the protruding points from affecting the balance during massage. At the same time, when rotating, the airflow guide fins 2 can guide the airflow when the hula hoop 1 rotates, improve the smoothness of rotation, and generate auxiliary propulsion force, reducing the user's physical exertion.

[0019] It should be explained that the guide fin 2 must be made of lightweight materials (such as ABS plastic) to avoid increasing weight and affecting maneuverability.

[0020] Furthermore, the inner side of the hula hoop 1 is evenly and alternately distributed with large protrusions 3 and small protrusions 4. When the hula hoop 1 rotates, the large protrusions 3 and small protrusions 4 come into contact with the waist and abdomen. The different protrusion distances of the large protrusions 3 and small protrusions 4 create a difference, which increases the friction between the hula hoop 1 and the waist and abdomen through differentiated contact, preventing slippage and avoiding the discomfort caused by uniform pressure. In addition, the protrusions stimulate the muscles of the waist and abdomen through local pressure changes, which greatly improves the shaping efficiency.

[0021] It should be noted that the combination of the guide fin 2 with the large protrusion point 3 and the small protrusion point produces a pulse-like massage similar to "wave pushing back".

[0022] Specifically, the outer diameter of hula hoop 1 is 90cm and the inner diameter is 80cm. The larger diameter provides a higher moment of rotational inertia, and the airflow design extends the rotation time.

[0023] It can be concluded that the diameter of the large protrusion point 3 is 6.75cm, the diameter of the small protrusion point 4 is 4cm, the distance from the most prominent point of the large protrusion point 3 to the inner diameter of the hula hoop 1 is 1.2cm, and the distance from the most prominent point of the small protrusion point 4 to the inner diameter of the hula hoop 1 is 0.7cm.

[0024] The next step involves using a biomimetic honeycomb structure to distribute pressure on the large protruding point 3 and the small protruding point 4 (made of silicone). The dot matrix layout is based on key acupoints in traditional Chinese medicine such as the Yaoshu acupoint and the Mingmen acupoint, which has the effect of traditional Chinese massage.

[0025] In addition, the joint between the hula hoop 1 and the guide fin 2 is provided with a reinforcing rib structure, and the rib height of the reinforcing rib structure is 0.5-0.8mm.

[0026] Furthermore, the hula hoop 1 and the guide fin 2 are bonded at the molecular level, with a peel strength ≥15N / cm.

[0027] Furthermore, the angle range of the guide fins (15-25°) avoids the 30-45° effective range disclosed in patent CN201780023456.7.

[0028] It should be noted that the data comparison between the hula hoop in this case and the traditional hula hoop is as follows:

[0029] parameter Traditional hula hoop The improved hula hoop in this case air drag coefficient 0.85 0.52 Continuous rotation time 42s 68s slippage rate 27％ 6％

[0030] Working principle: When the hula hoop 1 rotates clockwise, the acute angle of the leading edge of the guide fin 4 cuts into the airflow, guiding the laminar flow to slide along the guide surface. The central groove generates a controllable turbulent boundary layer, and the acute angle of the trailing edge cuts off the wake vortex, reducing pressure drag. The support surface generates reverse lift to compensate for centrifugal force fluctuations. The rotational drag is reduced through aerodynamic design.

[0031] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An aerodynamic-based hula hoop, comprising: The hula hoop (1) is characterized in that: the outer side of the hula hoop (1) is uniformly distributed with flow guide fins (2), and the inner side of the hula hoop (1) is uniformly and alternately distributed with large protruding points (3) and small protruding points (4).

2. An aerodynamic based hula hoop as claimed in claim 1, wherein, The length of the flow guide fin (2) is 35.5 cm, and the protruding part of the flow guide fin (2) is 2 cm.

3. An aerodynamic based hula hoop as claimed in claim 1, wherein, The outer diameter of the hula hoop (1) is 90 cm, and the inner diameter is 80 cm.

4. An aerodynamic based hula hoop as defined in claim 1, wherein, The diameter of the large protruding point (3) is 6.75 cm, and the diameter of the small protruding point (4) is 4 cm.

5. An aerodynamic based hula hoop as defined in claim 1, wherein, The distance from the most protruding point of the large protruding point (3) to the inner diameter of the hula hoop (1) is 1.2 cm.

6. An aerodynamic based hoop according to claim 1, wherein, The distance from the most protruding point of the small protruding point (4) to the inner diameter of the hula hoop (1) is 0.7 cm.

7. An aerodynamic based hoop as claimed in claim 1, wherein, The combination part of the hula hoop (1) and the flow guide fin (2) is provided with a reinforcing rib structure, and the rib height of the reinforcing rib structure is 0.5-0.8 mm.

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