Shuttlecock

Abstract

The utility model discloses a kind of feather pieces of shuttlecock, which is processed and manufactured from poultry quill, and includes stem, feather piece connected at the rear end of stem, the maximum width of the front end of stem is 2.3~2.5mm, the maximum width of the rear end of stem is 0.9~1.1mm, the maximum width of the feather piece is 3~8mm, the weight of the feather piece is 0.0526~0.0823g, and the length of the feather piece is 74~75mm. The feather piece of the utility model is made of quill that does not meet the standard requirements for shuttlecock production. It can improve the utilization rate of quill raw materials and increase the production of shuttlecock, thereby suppressing the continuous upward trend of the shuttlecock market price.

Description

Technical Field

[0001] This utility model relates to a sporting good, specifically to a badminton shuttlecock feather. Background Technology

[0002] Badminton is a globally popular sport. A standard badminton shuttlecock consists of a head and a skirt. The head bears the brunt of the racket's impact and is the concentrated weight of the shuttlecock; it is often made of natural cork, composite cork, or fiberglass. The skirt is a crucial component affecting the shuttlecock's flight speed, stability, and durability. A standard badminton shuttlecock's skirt is composed of 16 feathers, sourced from bird wing feathers. After collection, the feathers undergo selection, washing, and cutting processes to create the feathers. These feathers are then inserted into the back of the head and secured with glue and string, resulting in a structurally reliable and stable skirt. Typically, the feathers used in shuttlecock production must meet the following requirements: the shaft length must be at least 180mm, the vane length at least 140mm, and the weight of a single feather after cutting should be 0.106–0.125g.

[0003] Among common poultry, traditionally free-range white-feathered geese and ducks, due to their long breeding cycle, large individual size, and natural environment with ample sunshine and rain, produce wing feathers that meet the raw material standards for producing standard badminton shuttlecocks. They are currently the primary source of raw feathers for standard badminton shuttlecock production. However, the tail feathers of these birds, as well as the feathers of the most widely raised poultry, the "white-feathered chicken," are unsuitable for making badminton shuttlecocks due to their fine, short, curved, and lightweight feathers. Nevertheless, some manufacturers use these poultry feathers to make badminton shuttlecocks, but the overall performance of the resulting shuttlecocks is significantly inferior to that of standard badminton shuttlecocks. They are only suitable for recreational use and cannot meet the quality requirements of badminton enthusiasts and professional athletes.

[0004] With increasing demands for ecological protection and food safety, modern centralized poultry farming is gradually replacing traditional free-range methods. In traditional free-range farming, geese and ducks have long breeding cycles of over 120 days and 75 days respectively, allowing ample time for feather growth. Furthermore, due to prolonged exposure to outdoor temperature, humidity, and light, the resulting feathers are firm, resilient, and of good quality. Each adult commercial goose or duck can provide approximately 14 feathers (7 on each wing) suitable for making standard badminton shuttlecocks. However, under modern farming conditions, the focus is typically on raising "small white strips" (ducks with shorter breeding cycles, not finely segmented, and often sold whole) for 28-32 days and "segmented ducks" (ducks raised to a specific cycle and then sold as individual parts like breast, legs, and wings) for 35-38 days. This significantly shortens the breeding cycle, resulting in insufficient feather growth time. Moreover, the lack of exercise due to prolonged indoor constant-temperature environments leads to finer and smaller feathers, causing many wing feathers to be discarded or used for other purposes because they do not meet requirements. Unlike waterfowl such as geese and ducks, the largest bird species, the wing feathers of broiler chickens, grown under modern farming conditions, are not significantly different from those of traditionally free-range chickens. Due to the accelerated promotion of modern centralized farming, the supply of standard wing feathers for broiler chickens and ducks has not only failed to increase in recent years, but has actually shown a gradual decreasing trend.

[0005] In recent years, with the popularization of badminton and the continuous growth of badminton enthusiasts, the market demand for badminton shuttlecocks has increased dramatically. However, the insufficient supply of duck and goose feathers has led to a continuous increase in the price of shuttlecocks. As a consumable item that is easily damaged under high-frequency hitting, shuttlecocks need to be replaced frequently during the game, further increasing the economic burden on ordinary enthusiasts and athletes, and to some extent affecting the healthy development of the standard badminton shuttlecock production industry. Although badminton shuttlecocks made of artificial materials and with modified shapes have recently appeared on the market, they are ultimately limited to recreational use because they cannot achieve the performance of standard shuttlecocks. Therefore, how to utilize the large quantity of duck and chicken wing feathers that cannot be used for standard production to produce shuttlecocks with the same performance as standard shuttlecocks represents not only a major breakthrough in technological innovation but also has great value in market application.

[0006] Regarding the aforementioned feathers that do not meet the requirements for standard badminton shuttlecock manufacturing, there have been attempts in the prior art to utilize them as raw materials for badminton shuttlecocks. For example, Chinese utility model patent applications disclose a short-feather wireless badminton shuttlecock and its processing method (CN117919676A), and Chinese utility model patents disclose a chicken feather badminton shuttlecock production process and its chicken feather feather manufacturing process (CN119139672B). Both propose the concept of using non-standard feathers, including chicken feathers, to replace the feather raw materials used in traditional standard badminton shuttlecocks. However, the shuttlecocks made from these materials differ significantly in structure from standard badminton shuttlecocks, and are noticeably inferior in terms of flight performance, durability, and hitting feel. Therefore, they are only suitable for recreational or entertainment use and cannot meet the requirements of competitive sports.

[0007] In addition, there is another type of recreational badminton shuttlecock on the market, made of non-standard feathers, commonly known as "small steel cannons". Compared with standard badminton shuttlecocks, this type of shuttlecock uses coarser non-standard feathers as raw material. The shaft of the feather is relatively thicker, the vane is relatively wider, the feather is heavier, and the number of feathers is usually less, generally 8 to 10. This type of shuttlecock is heavier overall, the center of gravity is further back, the flight speed is faster, but the flight stability and hitting feel are poor. Its overall performance is lower than that of standard badminton shuttlecocks, and it is also only suitable for recreational use. Utility Model Content

[0008] The purpose of this invention is to provide a badminton shuttlecock feather made from bird feathers that do not meet the standard requirements for shuttlecock production. This invention aims to overcome the technical prejudice that such feathers cannot be used to make high-performance shuttlecocks, thereby enabling the reasonable use of such feathers, improving the utilization rate of raw materials, and reducing production costs.

[0009] The feather of this utility model is made from poultry feathers and includes a shaft and feather vanes connected to both sides of the rear end of the shaft. The maximum width of the front end of the shaft is 2.3~2.5mm, the maximum width of the rear end of the shaft is 0.9~1.1mm, the maximum width of the feather vanes is 3~8mm, the weight of the feather vanes is 0.0526~0.0823g, and the length of the feather vanes is 74~75mm.

[0010] The requirements for raw feathers in this invention's badminton shuttlecocks differ from those in standard badminton shuttlecocks. This allows feathers that do not meet the requirements for standard badminton shuttlecock production and are usually discarded to be used in the production of shuttlecock feathers. The raw feathers can also be obtained from other poultry such as chickens and pigeons, greatly expanding the sources of feathers, reducing the raw material cost of badminton shuttlecocks, and enabling better promotion and popularization of badminton. This provides a strong guarantee and support for the sustainable development of badminton.

[0011] Because feathers made from non-standard feathers are typically thinner, and the thickness of the feather is related to its distance from the shaft (the further away from the shaft, the thinner it is), they are more prone to deformation or curling, leading to a decrease in the flatness and impact resistance of the feather. By limiting the maximum width of the feather to the range of 3-8mm, both the flatness and shape stability of the feather can be guaranteed, as well as its aerodynamics.

[0012] Furthermore, the maximum widths of the two side vanes of the feather are 5~8mm and 3~8mm, respectively. By setting the width of the two side vanes, air resistance can be increased to improve flight stability, while ensuring the flatness and edge strength of the vanes. This design is suitable for both symmetrical and asymmetrical structures, i.e., when the widths of the two side vanes are different.

[0013] Furthermore, the maximum width of one side of the feather is 6-8 mm, and the maximum width of the other side of the feather is 4-8 mm.

[0014] The above scheme is applicable to shuttlecocks made of 17 feathers, which allows for a sufficiently wide overlapping area between the feathers of adjacent feathers, thus improving the shuttlecock's flight stability and resistance to impact.

[0015] Furthermore, the maximum width of one side of the feather is 5-7 mm, and the maximum width of the other side of the feather is 3-7 mm.

[0016] The above solution is applicable to shuttlecocks made of 18 feathers, which allows for a sufficiently wide overlapping area between adjacent feathers, thus improving the shuttlecock's flight stability and resistance to impact.

[0017] Furthermore, the maximum width of one side of the feather is 4-6 mm, and the maximum width of the other side of the feather is 2-6 mm.

[0018] The above scheme is applicable to shuttlecocks made of 19 feathers, so that there is a sufficiently wide overlapping area between the feathers of adjacent feathers, which helps to improve the flight stability and impact resistance of the shuttlecock.

[0019] Furthermore, the front end of the shaft has a pointed portion, which can be formed by a punching process. The pointed portion can provide a guiding effect when the front end of the shaft is inserted into the insertion hole of the badminton shuttlecock, which can reduce the requirement for the fitting accuracy between the front end of the shaft and the insertion hole and avoid the shaft breaking during insertion.

[0020] Furthermore, the shaft has a flat cross-section, with its thickness gradually decreasing from the front to the rear. This shifts the shaft's center of gravity forward, which helps to position the shuttlecock's center of gravity forward, improving its flight performance. The thicker front end of the shaft also reduces the likelihood of breakage during connection with the shuttlecock head or during impact, enhancing the shuttlecock's durability. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of a piece of wool with an angular rear end; Figure 2 A schematic diagram of the structure of a piece of fabric with a rounded rear end; Figure 3 A schematic diagram of a feather with an asymmetrical vane structure; Figure 4 The usage status of the pornographic film Figure 1 ; Figure 5 The usage status of the pornographic film Figure 2 ; Figure 6 The usage status of the pornographic film Figure 3 ; Figure 7 A curve for judging the flight stability level of a badminton shuttlecock; Figure 8 This is a table comparing the durability ratings of badminton shuttlecocks. Detailed Implementation

[0022] In this invention, "front" refers to the direction of the feathers corresponding to the head of the shuttlecock; "back" refers to the direction of the feathers corresponding to the tail of the shuttlecock.

[0023] The feathers of this utility model badminton shuttlecock are made from processed poultry feathers, such as... Figures 1 to 3 As shown, it includes a shaft 1 and feathers 2 connected to both sides of the rear end of the shaft 1.

[0024] The maximum width of the front end W1 of the shaft 1 is 2.3~2.5mm, the maximum width of the rear end W2 of the shaft 1 is 0.9~1.1mm, the maximum width of the feather 2 is 3~8mm, the weight of the feather (including the weight of the shaft 1 and the feathers 2 on both sides) is 0.0526~0.0823g, and the length L of the feather (which is also the length of the shaft 1) is 74~75mm.

[0025] The requirements for raw feathers in this invention's badminton shuttlecocks differ from those in standard badminton shuttlecocks. This allows feathers that do not meet the requirements for standard badminton shuttlecock production and are usually discarded to be used in the production of shuttlecock feathers. The raw feathers can also be obtained from other poultry such as chickens and pigeons, greatly expanding the sources of feathers, reducing the raw material cost of badminton shuttlecocks, and enabling better promotion and popularization of badminton. This provides a strong guarantee and support for the sustainable development of badminton.

[0026] The shaft 1 has a tip 11 at its front end, which can be formed by a punching process. The tip 11 can provide a guiding effect when the front end of the shaft 1 is inserted into the insertion hole 31 of the badminton shuttlecock head 3 (e.g., Figure 6 As shown in the figure, it can reduce the requirements for the fitting accuracy between the front end of the rod 1 and the insertion hole 3, and avoid the rod 1 breaking during the insertion process.

[0027] The shaft 1 has a flat cross-section, with its thickness gradually decreasing from the front to the rear. Since the weight of the feathers is mainly concentrated in the shaft 1, this design allows the center of gravity of the shaft 1 to be relatively forward, thus shifting the overall center of gravity of the shuttlecock forward and improving its flight performance. Furthermore, because the front end of the shaft 1 is thicker, it is less prone to breakage during insertion or impact with the shuttlecock head 3, enhancing the shuttlecock's durability. Because the vane 2 of feathers made from non-standard feathers is usually thinner, and the thickness of the vane 2 is related to its distance from the shaft 1, the thickness is thinner in areas further away from the shaft 1, making it prone to deformation or curling, which leads to a decrease in the flatness and impact resistance of the vane 2. By limiting the maximum width of the vane 2 to the range of 3~8mm, both the flatness and shape stability of the vane 2 can be guaranteed, as well as its aerodynamics.

[0028] The feather vanes 2 on both sides of the feather can be as follows: Figure 1 or Figure 2 The symmetrical structure shown; or it can be as follows: Figure 3 The example shows an asymmetrical structure, where the widths of the two pinnae 2 are different.

[0029] The two side vanes 2 of the feather can be as follows: Figure 1 , Figures 3 to 5 As shown, the rear end has a sloping edge, and the rear end of the entire piece is angular; it can also be as follows: Figure 2 As shown, the rear end of the feather 2 has an arc-shaped edge, and the rear end of the feather as a whole is arc-shaped.

[0030] The specific shape of the feather 2 can be formed by punching.

[0031] The maximum widths of the feathers 2 on both sides of the shaft 1 are 5~8mm and 3~8mm respectively. These values ​​can be the same or different to suit the needs of symmetrical or asymmetrical feather structures.

[0032] By setting the width of the two side vanes 2, air resistance can be increased to improve flight stability, while ensuring the flatness and edge strength of the vanes 2.

[0033] In different implementations, the maximum width parameter of the feather 2 can be configured according to the number of feathers required in the skirt of the badminton shuttlecock, so as to achieve a balance between structural and aerodynamic performance. Specifically: The maximum width of one side of the feather is 6-8mm, and the maximum width of the other side is 4-8mm. Feathers with this maximum width can be used in shuttlecocks made of 17 feathers, so that there is a sufficiently wide overlapping area between the feathers of adjacent feathers, which helps to improve the flight stability and impact resistance of the shuttlecock.

[0034] Alternatively, the maximum width of one side of the feather is 5-7mm, and the maximum width of the other side is 3-7mm. Feathers with this maximum width can be used in shuttlecocks made of 18 feathers, so that there is a sufficiently wide overlapping area between the feathers of adjacent feathers, which helps to improve the flight stability and impact resistance of the shuttlecock.

[0035] Alternatively, the maximum width of one side of the feather is 4-6 mm, and the maximum width of the other side is 2-6 mm. Feathers with this maximum width can be used in shuttlecocks made of 19 feathers, so that there is a sufficiently wide overlapping area between the feathers of adjacent feathers, which helps to improve the flight stability and impact resistance of the shuttlecock.

[0036] As the number of feathers increases, the spacing between adjacent feathers will decrease accordingly. By limiting the maximum width W3 of the feather 2 to correspond to the number of feathers, it is possible to avoid the problem that the overlapping area of ​​the feather 2 between adjacent feathers is too small, which would weaken the strength, and that the feather 2 is too wide, which would cause the edges to be easily damaged.

[0037] like Figures 4 to 6 In specific applications, the front ends of the rods 1 of multiple feathers of this invention are inserted circumferentially into multiple insertion holes 31 at the rear end of the ball head 3, so that the feathers 2 of two circumferentially adjacent feathers are stacked together. Two sets of coils 41 are wound between the rods 1 of multiple feathers. Thread adhesive 42 is applied between the coils 41 and the rods 1. Thread adhesive 42 can cure the coils 41 and reinforce the connection between the rods 1 and the coils 41. Base adhesive 32 is applied between the rods 1 and the ball head 3. Base adhesive 32 can reinforce the connection between the front end of the rods 1 and the insertion holes 31.

[0038] To evaluate whether the feathers of this invention can meet practical application requirements, various performance tests were conducted on the feathers. By comparing them with feathers from standard badminton shuttlecocks (first-class quality) and feathers made from substandard feathers, a basis was provided for verifying the overall performance of the shuttlecocks after production.

[0039] Performance testing of pornographic films 1. Breaking force test 1.1 Test Objective The breaking force performance of the feathers of this invention was verified, and compared with the feathers of commercially available standard badminton shuttlecocks (first-class product) and other non-standard feathers to verify the feasibility of using the feathers of this invention to make badminton shuttlecocks with the same or similar performance as standard badminton shuttlecocks (first-class product).

[0040] 1.2 Test Methods A three-point bending load test was performed on the test piece using a static pressure tester. Specifically, the two ends of the test piece's rod were fixed using a three-point bending fixture, with the fixture spacing approximately 4 / 5 of the piece's length. The spacing could be adjusted appropriately based on the piece's length to ensure that the two ends of the rod were fixed and did not slip. The loading head of the testing machine was applied to the middle of the rod, with the direction of application perpendicular to the thickness direction of the rod. The load was applied slowly at a specific rate until the rod broke (i.e., the medulla inside the rod broke, showing obvious bending damage), and the breaking force of the piece was recorded (unit: N).

[0041] 1.3 Experimental and Control Group Setup Experimental group: 20 pieces of the basic utility model were randomly selected for testing, and the average breaking force was taken as the representative value; First control group: 20 standard badminton shuttlecock feathers (first grade) were randomly selected for testing, and the average breaking force was taken as the representative value; Second control group: 20 feathers of "small cannon" shaped badminton shuttlecocks were randomly selected for testing, and the average breaking force was taken as the representative value.

[0042] 1.4 Test Results The specific parameter configurations and test results for the experimental and control groups are detailed in Table 1.

[0043] Table 1. Breaking force test results of the wool pieces in the experimental and control groups.

[0044] 1.5 Conclusion The results in Table 1 show that the fracture resistance of the feathers of this invention is slightly lower than that of the feathers of a standard badminton shuttlecock (first-class product), but it meets the basic performance requirements of badminton shuttlecock feathers; the feathers of the "small cannon" type badminton shuttlecock have higher fracture resistance.

[0045] 2. Test of number of times the material does not deform under pressure 2.1 Test Objective The purpose of this invention is to verify the recovery ability of the feathers of the badminton shuttlecock after being bent under pressure, and to compare them with the feathers of commercially available standard badminton shuttlecocks (first-class product) and other non-standard feathers to verify the feasibility of the feathers of this invention in making badminton shuttlecocks with the same or similar performance as standard badminton shuttlecocks (first-class product).

[0046] 2.2 Test Method A three-point bending compression test was performed on the test piece using a static pressure tester. The specific method is as follows: The two ends of the test piece's rod are fixed using a three-point bending clamp. The clamp spacing is approximately 4 / 5 of the piece's length, and can be adjusted appropriately according to the piece's length to ensure that the two ends of the rod are fixed and do not slip. The loading head of the static pressure tester is applied to the middle of the rod of the test piece, with the direction of application perpendicular to the thickness direction of the rod. The applied force is used to bend the middle of the rod to a predetermined position (7mm offset). After static pressure is applied for 3 minutes, the pressure is released and allowed to stand for 2 minutes to allow it to recover naturally. The displacement change of the middle of the rod from the initial position should not exceed 3mm. This operation is repeated multiple times until the displacement change of the middle of the rod exceeds 3mm. The maximum number of compression cycles is recorded.

[0047] 2.3 Setup of Experimental and Control Groups Experimental group: 20 pieces of raw material from the basic utility model were randomly selected for testing, and the average number of times they were subjected to pressure was taken as the representative value; First control group: 20 standard badminton shuttlecocks (first grade) were randomly selected for testing, and the average number of times they were compressed was taken as the representative value; Second control group: 20 feathers of "small cannon" shaped badminton shuttlecocks were randomly selected for testing, and the average number of times they were compressed was taken as the representative value.

[0048] 2.4 Test Results The specific parameter configurations and test results for the experimental and control groups are detailed in Table 2.

[0049] Table 2. Results of the number of times the wool felt in the experimental and control groups remained undeformed under pressure.

[0050] 2.5 Conclusion The results in Table 2 show that the compressive deformation recovery performance of the feathers of this invention is slightly lower than that of the feathers of standard badminton shuttlecocks (first-class grade), but meets the basic performance requirements of badminton shuttlecock feathers; the feathers of the "small cannon" type badminton shuttlecock have a higher number of compressive deformation cycles.

[0051] 3. Feather anti-curling test 3.1 Test Objective The purpose of this invention is to verify the anti-curling ability of the feathers in the shuttlecock, and to compare it with standard shuttlecocks (first-class product) and other feathers made from non-standard feathers, so as to verify the feasibility of the feathers of this invention in making shuttlecocks with the same or similar performance as standard shuttlecocks (first-class product).

[0052] 3.2 Test Method Fix both ends of the test feather shaft, use an adjustable speed fan to generate a stable airflow, the airflow direction is perpendicular to the thickness direction of the feather vane (to simulate the impact force on the feather vane when the shuttlecock is hit and during flight), the airflow covers at least one side of the feather vane area, the wind speed is 5~10m / s, the action time is 5~10 seconds, after the action is completed, let it stand for 1 minute to recover naturally, after multiple tests, visually observe, stop the test when the edge of the feather vane is obviously curled or broken, and record the maximum number of tests.

[0053] 3.3 Experimental and Control Group Setup Experimental group: Randomly select feathers of this invention and divide them into three groups, A, B and C, according to the maximum width of the feathers. Each group contains 20 feathers, and the average number of tests is taken as the representative value. First control group: 20 standard badminton shuttlecock feathers (first grade) were randomly selected for testing, and the average number of tests was taken as the representative value; Second control group: 20 feathers of "small cannon" shaped badminton shuttlecocks were randomly selected for testing, and the average number of tests was taken as the representative value.

[0054] 3.4 Test Results The specific parameter configurations and test results for the experimental and control groups are detailed in Table 3.

[0055] Table 3. Results of feather anti-curling test in experimental and control groups.

[0056] 3.5 Conclusion Table 3 shows that, overall, the feather blades of this invention are similar to those of standard badminton shuttlecocks (first-class product) in terms of curl resistance, meeting the basic performance requirements of badminton shuttlecock feathers. As the maximum width of the feather blades decreases, the curl resistance of each experimental group shows an increasing trend, with Group A even slightly higher than that of the standard badminton shuttlecock feathers. The curl resistance of the feather blades is generally positively correlated with their thickness and negatively correlated with their maximum width. The maximum width of the feather blades determines the contact area with the airflow, which affects the flight stability of the final badminton shuttlecock. The feather raw materials used in standard badminton shuttlecocks (first-class product) are usually made of relatively thick feathers, and their feather blades are usually thicker, thus having better curl resistance. Although the feather blades of the second control group have a larger maximum width, because their feather blades are relatively thick, they can still maintain strong curl resistance under airflow impact, and the test results are significantly better than those of standard badminton shuttlecocks (first-class product).

[0057] The performance test results of the feathers mentioned above show that the feathers of this invention are slightly inferior to those used in standard badminton shuttlecocks (first-class product) in terms of resistance to breakage, recovery under pressure, and anti-curling properties. However, this is within an acceptable range and meets the basic performance requirements of badminton shuttlecock feathers. It should be noted that the mechanical properties of a single feather cannot fully reflect the overall performance of the shuttlecock. The flight stability, hitting feel, and durability of the shuttlecock also depend on the overall structural design of the shuttlecock. The length, width, and weight of the shaft of the feathers of this invention are similar to those of standard badminton shuttlecocks (first-class product). By optimizing the overall structure of the shuttlecock (e.g., the number of feathers, the width of the feather stacking, the overall weight of the shuttlecock, and the center of gravity configuration), the performance of the shuttlecock can be further improved, thereby enabling the production of shuttlecocks with the same or similar performance as standard badminton shuttlecocks (first-class product).

[0058] In comparison, the "small cannon" type badminton shuttlecock has better test results for its feathers, but because its shaft is significantly thicker and heavier, the overall weight of the shuttlecock is higher and the center of gravity is further back. This results in excessively fast flight speed and insufficient stability when hit, making it difficult to balance the shuttlecock's flight performance, hitting feel, and durability.

[0059] In summary, the feathers of this invention exhibit a balanced performance in various physical parameters and properties, possessing the potential to produce high-performance badminton shuttlecocks. Here, "high performance" refers to the overall performance of the shuttlecock reaching or approaching the level of a standard badminton shuttlecock (first-class product) in terms of flight stability, durability, and hitting feel.

[0060] To further verify the feasibility of using the feathers of this invention to prepare high-performance badminton shuttlecocks, three implementation schemes for badminton shuttlecocks made using the feathers of this invention were designed, and their flight stability and durability were tested. The specific parameter configurations for each implementation scheme are shown in Table 4.

[0061] Table 4. Specific parameters of different badminton shuttlecock implementation schemes

[0062] The shuttlecocks in the above three implementation schemes have the same basic structure and manufacturing process as the standard shuttlecock (first-class product), but the weight and size of each component differ from those of the standard shuttlecock.

[0063] To verify the flight and durability performance of badminton shuttlecocks with different parameter configurations according to this utility model, the following tests were conducted on the badminton shuttlecocks of the three embodiments.

[0064] Badminton performance test 4. Flight stability test 4.1 Dynamic performance testing: Test method: The shuttlecock's spin speed (N, unit: r / min), the deviation of the shuttlecock head (LTB, unit: mm), and the deviation of the shuttlecock mouth (LKB, unit: mm) were measured using a badminton dynamic performance tester. Evaluation criteria: comparison Figure 7 The "Badminton Flight Stability Level Judgment Curve" shown is used for judgment: different levels of badminton shuttlecocks correspond to different parameter ranges. For example, a superior grade shuttlecock must have a spin speed between 250 and 500 r / min, and the head deviation (LTB) and mouth deviation (LKB) values ​​must fall within the range of the "superior grade curve"; a first grade shuttlecock must have a spin speed between 200 and 500 r / min, and the head deviation (LTB) and mouth deviation (LKB) values ​​must fall within the range of the "first grade curve"; a qualified shuttlecock must have a spin speed between 50 and 600 r / min, and the head deviation (LTB) and mouth deviation (LKB) values ​​must fall within the range of the "qualified grade curve". If the parameters meet the requirements of the corresponding grade curve, the flight stability is qualified. 4.2 Professional Player's Service Judgment: Test method: The test is conducted by professionals using actual serve techniques. By observing the flight trajectory of the shuttlecock, the test determines whether its flight stability meets the standard. Evaluation criteria: When observing the flight trajectory, professionals judge the overall flight stability of the badminton shuttlecock by comprehensively considering factors such as whether the trajectory deviates from the preset path, whether there is swaying or drifting, and the consistency of multiple trajectories. The scoring criteria for flight stability are: poor, poor, average, good, and excellent.

[0065] 5. Durability Test 5.1 Ball head hardness test (verifying whether the ball head hardness meets the standard) Test method: Use a Shore hardness tester to measure three points on the ball head, and two points must pass the test (one of which must be at the center of the ball head). Evaluation criteria: Refer to the appendix Figure 8 The "Badminton Shuttlecock Durability Grade Comparison Table" shown is used for judgment; the head hardness of superior grade shuttlecocks is 60~85 Shore degrees, and the head hardness of first grade and qualified grade shuttlecocks is 60~90 Shore degrees.

[0066] Ball mouth deformation resistance test (verifying the ball mouth's ability to maintain its shape after being compressed) Test method: Use a dedicated static pressure tester to apply pressure to the part with "3 to 4 hairs on each side of the coil behind" until the diameter of the ball mouth is reduced by 20mm. Then apply static pressure for 5 minutes, release and let stand for 3 minutes. Measure the diameter of the ball mouth at the pressured part (measure once for each pressure at the same part). The change in diameter should not exceed 2mm. Evaluation criteria: Refer to the appendix Figure 8 The following criteria are used to determine the durability of shuttlecocks: Superior grade shuttlecocks must withstand ≥3 pressure tests without deformation at the mouth; first grade shuttlecocks must withstand ≥2 pressure tests without deformation at the mouth; and qualified shuttlecocks must withstand ≥1 pressure test without deformation at the mouth.

[0067] 5.2 Test on the adhesion strength between the felt and the ball head (to verify the adhesion strength between the felt and the ball head) Test method: The adhesion between the wool and the ball head is measured using a dedicated fastness tester for 5 minutes. Evaluation criteria: Refer to the appendix Figure 8 The following criteria are used to determine the durability of shuttlecocks: The adhesive strength of superior products is ≥180, the adhesive strength of first-class products is ≥150, the adhesive strength of qualified products is ≥100, and the adhesive strength of recreational products is ≥50.

[0068] 5.3 Impact Feel Test Testing method: The test is conducted and scored by at least 3 professionals, and the average score is taken as the final score.

[0069] Judging criteria: Professionals score the feel of the badminton shuttlecock based on the tactile feedback and the effect of the shot. The specific scoring criteria are shown in Table 5.

[0070] Table 5 Scoring Criteria for Badminton Hitting Feel Test

[0071] To clarify the performance differences between different implementation schemes and the standard badminton shuttlecock (first-class product), multiple tests were conducted on three core performance indicators: flight stability, durability, and hitting feel. The test results were averaged, as shown in Table 6 below.

[0072] Table 6 Comparison of performance test results between different badminton shuttlecock implementation schemes and standard badminton shuttlecocks (first-class product)

[0073] Based on the test results shown in Table 6 above and in comparison... Figure 7 The "Badminton Flight Stability Level Discrimination Curve" shown and Figure 8 According to the "Badminton Shuttlecock Durability Rating Comparison Table" shown, the flight stability and durability levels of each badminton shuttlecock implementation scheme of this utility model are the same as those of the standard badminton shuttlecock (first-class product), and their performance is close to that of the standard badminton shuttlecock (first-class product). Subjective hitting feel ratings from professional athletes indicate that the hitting feel of the badminton shuttlecocks in each implementation scheme is close to that of the standard badminton shuttlecock (first-class product).

[0074] Table 7 Comparison of performance test results of badminton shuttlecocks with different implementation schemes after 1-2 feathers were lost.

[0075] As shown in Table 7, even with 1-2 feathers broken, the shuttlecocks from each implementation scheme maintained good flight stability and professional athlete hitting feel scores, and performed better than the standard shuttlecock (first-class product). Even with 1-2 feathers on the skirt breaking at the shaft, the flight performance and hitting feel of the shuttlecocks from each implementation scheme only decreased slightly, but they could still be used for a period of time; while the standard shuttlecock experienced a more significant performance decline under the same damage conditions, usually requiring immediate replacement. Therefore, the shuttlecocks from each implementation scheme are superior to the standard shuttlecock (first-class product) in both durability and economy.

[0076] The above test results verify the feasibility of using the feathers of this invention in the preparation of high-performance badminton shuttlecocks. Using the feathers of this invention to make feathers can significantly improve the utilization rate of feathers and reduce the cost of raw materials.

[0077] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. A shuttlecock feather, made from processed poultry feathers, comprising a shaft and feather vanes connected to both sides of the rear end of the shaft, characterized in that: The maximum width of the front end of the shaft is 2.3~2.5mm, the maximum width of the rear end of the shaft is 0.9~1.1mm, the maximum width of the feather is 3~8mm, the weight of the feather is 0.0526~0.0823g, and the length of the feather is 74~75mm.

2. The feathers of the badminton shuttlecock according to claim 1, characterized in that: The maximum widths of the feathers on both sides of the feather are 5~8mm and 3~8mm, respectively.

3. The feathers of the badminton shuttlecock according to claim 2, characterized in that: The maximum width of one side of the feather is 6-8 mm, and the maximum width of the other side of the feather is 4-8 mm.

4. The feathers of the badminton shuttlecock according to claim 2, characterized in that: The maximum width of one side of the feather is 5-7 mm, and the maximum width of the other side of the feather is 3-7 mm.

5. The feathers of the badminton shuttlecock according to claim 2, characterized in that: The maximum width of one side of the feather is 4-6 mm, and the maximum width of the other side of the feather is 2-6 mm.

6. The feathers of the badminton shuttlecock according to claim 1, characterized in that: The front end of the rod has a pointed portion.

7. The feathers of the badminton shuttlecock according to claim 1, characterized in that: The cross-section of the rod is flat, and its thickness gradually decreases from the front end to the rear end.

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