Artificial shuttlecock

Abstract

An artificial shuttlecock comprises a base portion, a plurality of stems, a plurality of feathers, two first braided structures and a second braided structure. The stems are spaced at intervals on the base portion. Each of the stems comprises a base segment, a connecting segment, and a feather segment. The connecting segment is located between the base segment and the feather segment. The base segment being inserted into the base portion. Each of feathers is connected to the feather segment of the respective stem. The two first braided structures are adjacently disposed on the connecting segments of the stems. The second braided structure is disposed on the connecting segments of the stems and spaced apart from the two first braided structures.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims the priority benefit of Taiwan application serial No. 114110811, filed on Mar. 21, 2025. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.BACKGROUND1. Technical Field

[0002] The present disclosure relates to an artificial shuttlecock.2. Description of the Related Art

[0003] Badminton is a common and popular ball game, in which players compete by hitting a shuttlecock. A traditional shuttlecock primarily includes natural feathers combined with a base portion. The natural feathers are typically goose or duck feathers, which are selected and processed to form a finished shuttlecock. However, the acquisition of natural feathers has become increasingly difficult, and the selection process is complex and labor-intensive. As a result, artificial shuttlecocks have been introduced in the market to address the issues of natural feather shortages and complicated selection procedures.

[0004] Most artificial shuttlecocks use a soft nylon frame to replace natural feathers. The structure of the soft nylon frame is designed to carry the airflow generated during impact. However, shuttlecocks made from soft nylon frames offer inferior flight performance and hitting feel compared to those made of natural feathers, making them less acceptable to users. Some artificial shuttlecocks employ stems made of fiber-reinforced resin or carbon fiber materials, and feathers made of lightweight foam materials. These types of artificial shuttlecocks more closely resemble traditional ones (i.e., made of natural feathers) in appearance, and offer improved hitting feel compared to those made with soft frames.

[0005] Nevertheless, stems made of fiber-reinforced resin materials generally lack the strength (toughness) and durability of natural feathers. On the other hand, stems made of carbon fiber materials tend to cause damage to the base portion and the stems, which may result in stem breakage. Accordingly, there is room for improvement.SUMMARY

[0006] In view of the issue above, it is a primary object of the present disclosure to provide an artificial shuttlecock in which two first braided structures and a second braided structure are disposed on a plurality of stems, so as to address the problem of reduced overall durability caused by the stems of prior art artificial shuttlecocks.

[0007] To achieve the above objective, the present disclosure provides an artificial shuttlecock, which comprises a base portion, a plurality of stems, a plurality of feathers, two first braided structures and a second braided structure. The stems are spaced at intervals on the base portion. Each of the stems comprises a base segment, a connecting segment, and a feather segment. The connecting segment is located between the base segment and the feather segment. The base segment being inserted into the base portion. Each of feathers is connected to the feather segment of the respective stem. The two first braided structures are adjacently disposed on the connecting segments of the stems. The second braided structure is disposed on the connecting segments of the stems and spaced apart from the two first braided structures.

[0008] According to an embodiment of the present disclosure, a minimum distance from the two first braided structures to the base segment is less than a minimum distance from the second braided structure to the base segment.

[0009] According to an embodiment of the present disclosure, a minimum distance from the two first braided structures to the base segment is greater than a minimum distance from the second braided structure to the feather segment.

[0010] According to an embodiment of the present disclosure, each of the two first braided structures is formed by braiding three filaments.

[0011] According to an embodiment of the present disclosure, the second braided structure is formed by braiding three filaments.

[0012] According to an embodiment of the present disclosure, the second braided structure is formed by braiding four filaments.

[0013] According to an embodiment of the present disclosure, each of the two first braided structures is formed by braiding four filaments.

[0014] According to an embodiment of the present disclosure, the second braided structure is formed by braiding four filaments.

[0015] According to an embodiment of the present disclosure, the two first braided structures and the second braided structure are wound around the connecting segments of the stems.

[0016] According to an embodiment of the present disclosure, the stems are made of carbon fiber reinforced resin material.

[0017] As described above, the artificial shuttlecock according to the present disclosure comprises a base portion, a plurality of stems, a plurality of feathers, two first braided structures, and a second braided structure. Each stem comprises a base segment, a connecting segment, and a feather segment. The feathers are respectively connected to the feather segments of the stems. The two first braided structures are adjacently disposed on the connecting segments of the stems. The second braided structure is also disposed on the connecting segments of the stems and is spaced from the two first braided structures. The artificial shuttlecock features a structural design in which two tightly stacked braided structures (i.e., the first braided structures) are provided, thereby significantly enhancing the durability of the artificial shuttlecock and simultaneously improving the hitting feel.BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a perspective view of an artificial shuttlecock according to one embodiment of the present disclosure;

[0019] FIG. 2 is an exploded view of the artificial shuttlecock shown in FIG. 1;

[0020] FIG. 3 is an exploded view of one of the stems and its corresponding feather shown in FIG. 2;

[0021] FIG. 4 is an enlarged view of one of the braided structures of the connecting assembly shown in FIG. 1; and

[0022] FIG. 5 is an enlarged view of a braided structure according to another embodiment of the present disclosure.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the structure, characteristics, and effectiveness of the disclosure further understood and recognized, a detailed description of the disclosure is provided as follows, along with embodiments and accompanying figures.

[0024] FIG. 1 is a perspective view of an artificial shuttlecock according to one embodiment of the present disclosure; and FIG. 2 is an exploded view of the artificial shuttlecock shown in FIG. 1. Please refer to FIG. 1 and FIG. 2. The artificial shuttlecock 1 of this embodiment comprises a base portion 10, a plurality of stems 20, a plurality of feathers 30, and a connecting assembly 40. One side of the base portion 10 has a semi-cylindrical structure. The base portion 10 includes a top surface 11 and a convex surface 12 located on opposite sides thereof. The convex surface 12 is the outer surface of the semi-cylindrical structure, and the top surface 11 is configured to receive insertion of the stems 20. Preferably, the base portion 10 further includes a recess 13 formed in the top surface 11 and extending from the top surface 11 toward the convex surface 12. In other words, the recess 13 is a groove that extends inwardly from the top surface 11 into the base portion 10. In this embodiment, the recess 13 has a symmetrical shape relative to the top surface 11, such as a circular, annular, quadrilateral, octagonal, or hexadecagonal shape; a circular shape is used in this embodiment. Preferably, the recess 13 and the top surface 11 are concentrically arranged. In this embodiment, the volume of the recess 13 accounts for approximately 1% to 7% of the total volume of the base portion 10. Generally, the volume of the base portion 10 is about 10,866 mm3, so the volume of the recess 13 (the hollow portion) may range from 414 mm3 to 692 mm3. In this embodiment, the volume of the recess 13 is 553 mm3.

[0025] Each stem 20 of this embodiment comprises a base segment 21, a connecting segment 22, and a feather segment 23. The connecting segment 22 is positioned between the base segment 21 and the feather segment 23. In other words, each stem 20 of this embodiment can be divided into three segments: the two ends are respectively the base segment 21 and the feather segment 23, and the intermediate portion is the connecting segment 22. The stems 20 are intermittently disposed on the base portion 10, with each base segment 21 being inserted into the top surface 11 of the base portion 10. In this embodiment, the stems 20 are made of a carbon fiber-reinforced resin material to enhance durability. Specifically, the stems 20 are composed of a stacked structure of unidirectional (UD) carbon fiber fabric and woven glass fiber fabric, which improves the strength and durability of the stems 20.

[0026] The feather segment 23 of each stem 20 is connected to a feather 30. That is, the feathers 30 are respectively connected to the feather segments 23 of the stems 20. FIG. 3 is an exploded view of one of the stems and its corresponding feather shown in FIG. 2. Please refer to FIG. 1, FIG. 2, and FIG. 3. Preferably, in this embodiment, the feathers 30 are adhered to the feather segments 23 of the stems 20 using an adhesive. In this embodiment, every two feathers 30 are paired with one stem 20; that is, two feathers 30 are connected to one of the stems 20. In addition, two feathers 30 are disposed on opposite sides of the stem 20. Specifically, one surface of each of the two feathers 30 is coated with an adhesive, which is then adhered to opposite sides of the stem 20. The remaining portions of the two feathers 30 are subsequently pressed together, such that the feathers 30 are also bonded to each other. Preferably, the feathers 30 are bonded to the stem 20 first, and then the base segment 21 of the stem 20 is inserted into the base portion 10. In other words, in this embodiment, the segment of the stem 20 that is inserted into the base portion 10 is referred to as the base segment 21, the segment connected to the feathers 30 is referred to as the feather segment 23, and the segment between the base segment 21 and the feather segment 23 is referred to as the connecting segment 22.

[0027] In this embodiment, the feathers 30 are also artificial, serving as a substitute for natural feathers. The feathers 30 are made of a plastic material having a density between 0.9 g / cm3 and 1.48 g / cm3. The type of plastic may include, but is not limited to, low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), acrylonitrile-butadiene-styrene (ABS), polyamide (PA), and extruded polyethylene (EPE). Preferably, the feathers 30 are made from a combination of LDPE and LLDPE. In addition, the overall configuration of the feathers 30 generally corresponds to that of natural feathers used in traditional shuttlecocks. Specifically, the feathers 30 may have a symmetrical structure with respect to the corresponding stem 20, serving as a symmetry axis. For example, the feathers 30 may be configured in a kite-like shape.

[0028] After the stems 20 are spaced at intervals on the base portion 10, a connecting assembly 40 is used to maintain the spacing between adjacent stems 20. The connecting assembly 40 of this embodiment comprises two first braided structures 41 and 42, and one second braided structure 43. The two first braided structures 41 and 42 are disposed adjacent to each other on the connecting segments 22 of the respective stems 20. As shown in FIG. 1, the first braided structures 41 and 42 are closely stacked and wound around the connecting segments 22 of the stems 20. In this embodiment, the first braided structure 41 is disposed below (i.e., closer to the base portion 10), and the first braided structure 42 is disposed above the first braided structure 41 (i.e., toward the side of the feathers 30), with the two braided structures 41 and 42 being in close contact with each other. Additionally, the second braided structure 43 is also disposed on the connecting segments 22 of the stems 20 and is spaced apart from the two first braided structures 41 and 42. That is, the first braided structures 41 and 42 are in close contact with each other, while the second braided structure 43 is arranged at a distance from the stacked first braided structures 41 and 42.

[0029] Preferably, the first braided structures 41 and 42 are positioned closer to the base segment 21 than the second braided structure 43. Specifically, the minimum distance D1 from the first braided structures 41 and 42 to the base segment 21 is less than the minimum distance D2 from the second braided structure 43 to the base segment 21, as shown in FIG. 1. It should be noted that, because the first braided structure 41 is closer to the base portion 10, the minimum distance D1 described herein refers to the distance between the bottom edge of the first braided structure 41 and the top edge of the base segment 21. Likewise, the minimum distance D2 refers to the distance between the bottom edge of the second braided structure 43 and the top edge of the base segment 21.

[0030] Preferably, in this embodiment, the minimum distance D1 from the first braided structures 41 and 42 to the base segment 21 is greater than the minimum distance D3 from the second braided structure 43 to the feather segment 23, as shown in FIG. 1. Similarly, the minimum distance D3 refers to the distance between the top edge of the second braided structure 43 and the bottom edge of the base segment 21. In other words, the distance between the second braided structure 43 and the feathers 30 is less than the distance between the first braided structures 41 and 42 and the base portion 10. In other embodiments, the minimum distance D1 from the first braided structures 41 and 42 to the base segment 21 may also be less than or equal to the minimum distance D3 from the second braided structure 43 to the feather segment 23. The present disclosure is not limited in this regard. Preferably, after the first braided structures 41 and 42 and the second braided structure 43 are wound around the stems 20, an adhesive is applied to the first braided structures 41 and 42, the second braided structure 43, and the connecting segments 22 to fix the spacing between the first and second braided structures.

[0031] The first braided structures 41 and 42 and the second braided structure 43 are all formed by braiding multiple filaments. FIG. 4 is an enlarged schematic view of one of the braided structures of the connecting assembly shown in FIG. 1, which may be any one of the first braided structures 41 or 42, or the second braided structure 43. Please also refer to FIG. 4. In this embodiment, each of the first braided structures 41 and 42 and the second braided structure 43 is braided from three filaments, which is referred to in this disclosure as a “three-strand” braided structure. Furthermore, the two first braided structures 41 and 42 are tightly stacked together and are referred to as a “two-layer” braided structure in this disclosure, whereas the single second braided structure 43 is referred to as a “single-layer” braided structure. Accordingly, the connecting assembly 40 of this embodiment includes a three-strand two-layer braided structure (i.e., the first braided structures 41 and 42) and a three-strand single-layer braided structure (i.e., the second braided structure 43).

[0032] FIG. 5 is an enlarged schematic view of the braided structure of another embodiment of the present disclosure. Please refer to FIG. 5. In this embodiment, the braided structure may be braided from four filaments. Similarly, it may be any of the first braided structures 41a or 42a, or the second braided structure 43a. In this disclosure, the previously mentioned braided structures braided from three filaments are referred to as the first braided structures 41 and 42, or the second braided structure 43. The braided structures braided from four filaments are assigned different reference numerals-namely, the first braided structures 41a and 42a, or the second braided structure 43a. In the previous embodiment, the connecting assembly 40 may include a three-strand two-layer braided structure (i.e., the first braided structures 41 and 42) and a three-strand single-layer braided structure (i.e., the second braided structure 43). In another embodiment, the connecting assembly may include a three-strand two-layer braided structure (i.e., the first braided structures 41 and 42) and a four-strand single-layer braided structure (i.e., the second braided structure 43a). In yet another embodiment, the connecting assembly may include a four-strand two-layer braided structure (i.e., the first braided structures 41a and 42a) and a four-strand single-layer braided structure (i.e., the second braided structure 43a). This disclosure also includes durability tests conducted on artificial shuttlecocks made using the various types of braided structures described above. The test results are shown in Table 1.TABLE 1Durability test report for artificial shuttlecocks (SampleNos. A to D) with different types of connecting assembly,and a traditional feather shuttlecock (Sample No. E).Features of the ConnectingDurability (AverageSample No.AssemblyNumber of Smashes)A(1) Three-strand, two-layer15 smashes(2) Three-strand, single-layerB(1) Three-strand, two-layer14.5 smashes  (2) Four-strand, single-layerC(1) Four-strand, two-layer11 smashes(2) Four-strand, single-layerD(1) Four-strand, single-layer 7 smashes(2) Four-strand, single-layerE(1) Four-strand, single-layer 6 smashes(2) Four-strand, single-layer

[0033] Among them, the artificial shuttlecock labeled as sample No. A corresponds to the artificial shuttlecock 1 described in the previous embodiment, wherein the connecting assembly 40 includes a three-strand, two-layer braided structure (i.e., first braided structures 41 and 42) and a three-strand, single-layer braided structure (i.e., second braided structure 43). The artificial shuttlecock labeled as sample No. B includes a three-strand, two-layer braided structure (i.e., first braided structures 41 and 42) and a four-strand, single-layer braided structure (i.e., second braided structure 43a). The artificial shuttlecock labeled as sample No. C includes a four-strand, two-layer braided structure (i.e., first braided structures 41a and 42a) and a four-strand, single-layer braided structure (i.e., second braided structure 43a). The shuttlecock labeled as sample No. E is a traditional feather shuttlecock, which is made of natural feathers. Conventionally, the braided structure of natural feather shuttlecocks is typically composed of four intertwined strands (i.e., four-strand), and only in a single-layer configuration; thus, forming two sets of four-strand, single-layer braided structures. The artificial shuttlecock labeled as sample No. D mimics this configuration, incorporating two sets of four-strand, single-layer braided structures. It is also noted that aside from the differences in braided structure described above, the other structural features of the artificial shuttlecocks identified as sample Nos. A-D are identical.

[0034] Furthermore, the durability test was conducted by continuously performing smashes using the shuttlecocks identified as Sample Nos. A to E until either the stem or the connection to the base portion was damaged. The average number of smashes sustained was recorded. From the durability test results shown in Table 1, it is evident that when the artificial shuttlecock adopts a two-layer braided structure with tightly stacked thread layers (i.e., first braided structures 41 and 42 or 41a and 42a), its durability can be significantly improved. That is, the artificial shuttlecocks identified as sample Nos. A, B, and C with two-layer braided structures can withstand a higher average number of smashes compared to shuttlecocks identified as sample Nos. D and E with single-layer braided structures. Preferably, the artificial shuttlecocks identified as sample Nos. A and B, which have three-strand, two-layer braided structures (i.e., the first braided structures 41 and 42), exhibited an improvement in durability by more than two times, for example, increasing from approximately 6 smashes to 14.5 or 15 smashes.TABLE 2Hitting sensation test report for artificial shuttlecocks (SampleNos. A to D) with varying connecting assembly configurations.Net ShotOverallSampleFeatures of the ConnectingSensationEvaluationNo.Assembly(9-point scale)(9-point scale)A(1) Three-strand, two-layer6.3~7.26.8~7(2) Three-strand, single-layerB(1) Three-strand, two-layer6.26.2~7(2) Four-strand, single-layerC(1) Four-strand, two-layer7.67(2) Four-strand, single-layerD(1) Four-strand, single-layer5~6  5~6(2) Four-strand, single-layer

[0035] In addition, the “Net Shot Sensation (9-point scale)” column reflects user ratings based on the flight performance of the artificial shuttlecocks (sample Nos. A to D) during net shot techniques, with a maximum score of 9 points. During the user's hitting process, the evaluation was based on factors such as the number of rotations, the rate of spin of the shuttlecock, as well as the perceived elasticity and hardness during impact. The closer the performance resembled that of a traditional feather shuttlecock, the higher the score. Furthermore, the “Overall Evaluation (9-point scale)” column represents a comprehensive evaluation of the flight behavior and flight speed of the artificial shuttlecocks (sample Nos. A to D) during hitting. Similarly, better flight performance resulted in higher scores.

[0036] From the hitting sensation test results shown in Table 2, it can be seen that the artificial shuttlecocks (sample Nos. A, B, and C) with two closely stacked strands of braided structures (i.e., the first braided structures 41, 42 or 41a, 42a) exhibited superior performance in both trajectory control (net shot) and overall evaluation compared to the artificial shuttlecock (sample No. D) having a prior art single-layer braided structure.

[0037] As described above, the artificial shuttlecock according to the present disclosure comprises a base portion, a plurality of stems, a plurality of feathers, two first braided structures, and a second braided structure. Each stem comprises a base segment, a connecting segment, and a feather segment. The feathers are respectively connected to the feather segments of the stems. The two first braided structures are adjacently disposed on the connecting segments of the stems. The second braided structure is also disposed on the connecting segments of the stems and is spaced from the two first braided structures. The artificial shuttlecock features a structural design in which two tightly stacked braided structures (i.e., the first braided structures) are provided, thereby significantly enhancing the durability of the artificial shuttlecock and simultaneously improving the hitting feel.

[0038] Although the present disclosure has been explained in relation to its preferred embodiments, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the disclosure as hereinafter claimed.

Examples

Embodiment Construction

[0023]In order to make the structure, characteristics, and effectiveness of the disclosure further understood and recognized, a detailed description of the disclosure is provided as follows, along with embodiments and accompanying figures.

[0024]FIG. 1 is a perspective view of an artificial shuttlecock according to one embodiment of the present disclosure; and FIG. 2 is an exploded view of the artificial shuttlecock shown in FIG. 1. Please refer to FIG. 1 and FIG. 2. The artificial shuttlecock 1 of this embodiment comprises a base portion 10, a plurality of stems 20, a plurality of feathers 30, and a connecting assembly 40. One side of the base portion 10 has a semi-cylindrical structure. The base portion 10 includes a top surface 11 and a convex surface 12 located on opposite sides thereof. The convex surface 12 is the outer surface of the semi-cylindrical structure, and the top surface 11 is configured to receive insertion of the stems 20. Preferably, the base portion 10 further in...

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims the priority benefit of Taiwan application serial No. 114110811, filed on Mar. 21, 2025. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.BACKGROUND1. Technical Field

[0002] The present disclosure relates to an artificial shuttlecock.2. Description of the Related Art

[0003] Badminton is a common and popular ball game, in which players compete by hitting a shuttlecock. A traditional shuttlecock primarily includes natural feathers combined with a base portion. The natural feathers are typically goose or duck feathers, which are selected and processed to form a finished shuttlecock. However, the acquisition of natural feathers has become increasingly difficult, and the selection process is complex and labor-intensive. As a result, artificial shuttlecocks have been introduced in the market to address the issues of natural feather shortages and complicated selection procedures.

[0004] Most artificial shuttlecocks use a soft nylon frame to replace natural feathers. The structure of the soft nylon frame is designed to carry the airflow generated during impact. However, shuttlecocks made from soft nylon frames offer inferior flight performance and hitting feel compared to those made of natural feathers, making them less acceptable to users. Some artificial shuttlecocks employ stems made of fiber-reinforced resin or carbon fiber materials, and feathers made of lightweight foam materials. These types of artificial shuttlecocks more closely resemble traditional ones (i.e., made of natural feathers) in appearance, and offer improved hitting feel compared to those made with soft frames.

[0005] Nevertheless, stems made of fiber-reinforced resin materials generally lack the strength (toughness) and durability of natural feathers. On the other hand, stems made of carbon fiber materials tend to cause damage to the base portion and the stems, which may result in stem breakage. Accordingly, there is room for improvement.SUMMARY

[0006] In view of the issue above, it is a primary object of the present disclosure to provide an artificial shuttlecock in which two first braided structures and a second braided structure are disposed on a plurality of stems, so as to address the problem of reduced overall durability caused by the stems of prior art artificial shuttlecocks.

[0007] To achieve the above objective, the present disclosure provides an artificial shuttlecock, which comprises a base portion, a plurality of stems, a plurality of feathers, two first braided structures and a second braided structure. The stems are spaced at intervals on the base portion. Each of the stems comprises a base segment, a connecting segment, and a feather segment. The connecting segment is located between the base segment and the feather segment. The base segment being inserted into the base portion. Each of feathers is connected to the feather segment of the respective stem. The two first braided structures are adjacently disposed on the connecting segments of the stems. The second braided structure is disposed on the connecting segments of the stems and spaced apart from the two first braided structures.

[0008] According to an embodiment of the present disclosure, a minimum distance from the two first braided structures to the base segment is less than a minimum distance from the second braided structure to the base segment.

[0009] According to an embodiment of the present disclosure, a minimum distance from the two first braided structures to the base segment is greater than a minimum distance from the second braided structure to the feather segment.

[0010] According to an embodiment of the present disclosure, each of the two first braided structures is formed by braiding three filaments.

[0011] According to an embodiment of the present disclosure, the second braided structure is formed by braiding three filaments.

[0012] According to an embodiment of the present disclosure, the second braided structure is formed by braiding four filaments.

[0013] According to an embodiment of the present disclosure, each of the two first braided structures is formed by braiding four filaments.

[0014] According to an embodiment of the present disclosure, the second braided structure is formed by braiding four filaments.

[0015] According to an embodiment of the present disclosure, the two first braided structures and the second braided structure are wound around the connecting segments of the stems.

[0016] According to an embodiment of the present disclosure, the stems are made of carbon fiber reinforced resin material.

[0017] As described above, the artificial shuttlecock according to the present disclosure comprises a base portion, a plurality of stems, a plurality of feathers, two first braided structures, and a second braided structure. Each stem comprises a base segment, a connecting segment, and a feather segment. The feathers are respectively connected to the feather segments of the stems. The two first braided structures are adjacently disposed on the connecting segments of the stems. The second braided structure is also disposed on the connecting segments of the stems and is spaced from the two first braided structures. The artificial shuttlecock features a structural design in which two tightly stacked braided structures (i.e., the first braided structures) are provided, thereby significantly enhancing the durability of the artificial shuttlecock and simultaneously improving the hitting feel.BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a perspective view of an artificial shuttlecock according to one embodiment of the present disclosure;

[0019] FIG. 2 is an exploded view of the artificial shuttlecock shown in FIG. 1;

[0020] FIG. 3 is an exploded view of one of the stems and its corresponding feather shown in FIG. 2;

[0021] FIG. 4 is an enlarged view of one of the braided structures of the connecting assembly shown in FIG. 1; and

[0022] FIG. 5 is an enlarged view of a braided structure according to another embodiment of the present disclosure.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the structure, characteristics, and effectiveness of the disclosure further understood and recognized, a detailed description of the disclosure is provided as follows, along with embodiments and accompanying figures.

[0024] FIG. 1 is a perspective view of an artificial shuttlecock according to one embodiment of the present disclosure; and FIG. 2 is an exploded view of the artificial shuttlecock shown in FIG. 1. Please refer to FIG. 1 and FIG. 2. The artificial shuttlecock 1 of this embodiment comprises a base portion 10, a plurality of stems 20, a plurality of feathers 30, and a connecting assembly 40. One side of the base portion 10 has a semi-cylindrical structure. The base portion 10 includes a top surface 11 and a convex surface 12 located on opposite sides thereof. The convex surface 12 is the outer surface of the semi-cylindrical structure, and the top surface 11 is configured to receive insertion of the stems 20. Preferably, the base portion 10 further includes a recess 13 formed in the top surface 11 and extending from the top surface 11 toward the convex surface 12. In other words, the recess 13 is a groove that extends inwardly from the top surface 11 into the base portion 10. In this embodiment, the recess 13 has a symmetrical shape relative to the top surface 11, such as a circular, annular, quadrilateral, octagonal, or hexadecagonal shape; a circular shape is used in this embodiment. Preferably, the recess 13 and the top surface 11 are concentrically arranged. In this embodiment, the volume of the recess 13 accounts for approximately 1% to 7% of the total volume of the base portion 10. Generally, the volume of the base portion 10 is about 10,866 mm3, so the volume of the recess 13 (the hollow portion) may range from 414 mm3 to 692 mm3. In this embodiment, the volume of the recess 13 is 553 mm3.

[0025] Each stem 20 of this embodiment comprises a base segment 21, a connecting segment 22, and a feather segment 23. The connecting segment 22 is positioned between the base segment 21 and the feather segment 23. In other words, each stem 20 of this embodiment can be divided into three segments: the two ends are respectively the base segment 21 and the feather segment 23, and the intermediate portion is the connecting segment 22. The stems 20 are intermittently disposed on the base portion 10, with each base segment 21 being inserted into the top surface 11 of the base portion 10. In this embodiment, the stems 20 are made of a carbon fiber-reinforced resin material to enhance durability. Specifically, the stems 20 are composed of a stacked structure of unidirectional (UD) carbon fiber fabric and woven glass fiber fabric, which improves the strength and durability of the stems 20.

[0026] The feather segment 23 of each stem 20 is connected to a feather 30. That is, the feathers 30 are respectively connected to the feather segments 23 of the stems 20. FIG. 3 is an exploded view of one of the stems and its corresponding feather shown in FIG. 2. Please refer to FIG. 1, FIG. 2, and FIG. 3. Preferably, in this embodiment, the feathers 30 are adhered to the feather segments 23 of the stems 20 using an adhesive. In this embodiment, every two feathers 30 are paired with one stem 20; that is, two feathers 30 are connected to one of the stems 20. In addition, two feathers 30 are disposed on opposite sides of the stem 20. Specifically, one surface of each of the two feathers 30 is coated with an adhesive, which is then adhered to opposite sides of the stem 20. The remaining portions of the two feathers 30 are subsequently pressed together, such that the feathers 30 are also bonded to each other. Preferably, the feathers 30 are bonded to the stem 20 first, and then the base segment 21 of the stem 20 is inserted into the base portion 10. In other words, in this embodiment, the segment of the stem 20 that is inserted into the base portion 10 is referred to as the base segment 21, the segment connected to the feathers 30 is referred to as the feather segment 23, and the segment between the base segment 21 and the feather segment 23 is referred to as the connecting segment 22.

[0027] In this embodiment, the feathers 30 are also artificial, serving as a substitute for natural feathers. The feathers 30 are made of a plastic material having a density between 0.9 g / cm3 and 1.48 g / cm3. The type of plastic may include, but is not limited to, low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), acrylonitrile-butadiene-styrene (ABS), polyamide (PA), and extruded polyethylene (EPE). Preferably, the feathers 30 are made from a combination of LDPE and LLDPE. In addition, the overall configuration of the feathers 30 generally corresponds to that of natural feathers used in traditional shuttlecocks. Specifically, the feathers 30 may have a symmetrical structure with respect to the corresponding stem 20, serving as a symmetry axis. For example, the feathers 30 may be configured in a kite-like shape.

[0028] After the stems 20 are spaced at intervals on the base portion 10, a connecting assembly 40 is used to maintain the spacing between adjacent stems 20. The connecting assembly 40 of this embodiment comprises two first braided structures 41 and 42, and one second braided structure 43. The two first braided structures 41 and 42 are disposed adjacent to each other on the connecting segments 22 of the respective stems 20. As shown in FIG. 1, the first braided structures 41 and 42 are closely stacked and wound around the connecting segments 22 of the stems 20. In this embodiment, the first braided structure 41 is disposed below (i.e., closer to the base portion 10), and the first braided structure 42 is disposed above the first braided structure 41 (i.e., toward the side of the feathers 30), with the two braided structures 41 and 42 being in close contact with each other. Additionally, the second braided structure 43 is also disposed on the connecting segments 22 of the stems 20 and is spaced apart from the two first braided structures 41 and 42. That is, the first braided structures 41 and 42 are in close contact with each other, while the second braided structure 43 is arranged at a distance from the stacked first braided structures 41 and 42.

[0029] Preferably, the first braided structures 41 and 42 are positioned closer to the base segment 21 than the second braided structure 43. Specifically, the minimum distance D1 from the first braided structures 41 and 42 to the base segment 21 is less than the minimum distance D2 from the second braided structure 43 to the base segment 21, as shown in FIG. 1. It should be noted that, because the first braided structure 41 is closer to the base portion 10, the minimum distance D1 described herein refers to the distance between the bottom edge of the first braided structure 41 and the top edge of the base segment 21. Likewise, the minimum distance D2 refers to the distance between the bottom edge of the second braided structure 43 and the top edge of the base segment 21.

[0030] Preferably, in this embodiment, the minimum distance D1 from the first braided structures 41 and 42 to the base segment 21 is greater than the minimum distance D3 from the second braided structure 43 to the feather segment 23, as shown in FIG. 1. Similarly, the minimum distance D3 refers to the distance between the top edge of the second braided structure 43 and the bottom edge of the base segment 21. In other words, the distance between the second braided structure 43 and the feathers 30 is less than the distance between the first braided structures 41 and 42 and the base portion 10. In other embodiments, the minimum distance D1 from the first braided structures 41 and 42 to the base segment 21 may also be less than or equal to the minimum distance D3 from the second braided structure 43 to the feather segment 23. The present disclosure is not limited in this regard. Preferably, after the first braided structures 41 and 42 and the second braided structure 43 are wound around the stems 20, an adhesive is applied to the first braided structures 41 and 42, the second braided structure 43, and the connecting segments 22 to fix the spacing between the first and second braided structures.

[0031] The first braided structures 41 and 42 and the second braided structure 43 are all formed by braiding multiple filaments. FIG. 4 is an enlarged schematic view of one of the braided structures of the connecting assembly shown in FIG. 1, which may be any one of the first braided structures 41 or 42, or the second braided structure 43. Please also refer to FIG. 4. In this embodiment, each of the first braided structures 41 and 42 and the second braided structure 43 is braided from three filaments, which is referred to in this disclosure as a “three-strand” braided structure. Furthermore, the two first braided structures 41 and 42 are tightly stacked together and are referred to as a “two-layer” braided structure in this disclosure, whereas the single second braided structure 43 is referred to as a “single-layer” braided structure. Accordingly, the connecting assembly 40 of this embodiment includes a three-strand two-layer braided structure (i.e., the first braided structures 41 and 42) and a three-strand single-layer braided structure (i.e., the second braided structure 43).

[0032] FIG. 5 is an enlarged schematic view of the braided structure of another embodiment of the present disclosure. Please refer to FIG. 5. In this embodiment, the braided structure may be braided from four filaments. Similarly, it may be any of the first braided structures 41a or 42a, or the second braided structure 43a. In this disclosure, the previously mentioned braided structures braided from three filaments are referred to as the first braided structures 41 and 42, or the second braided structure 43. The braided structures braided from four filaments are assigned different reference numerals-namely, the first braided structures 41a and 42a, or the second braided structure 43a. In the previous embodiment, the connecting assembly 40 may include a three-strand two-layer braided structure (i.e., the first braided structures 41 and 42) and a three-strand single-layer braided structure (i.e., the second braided structure 43). In another embodiment, the connecting assembly may include a three-strand two-layer braided structure (i.e., the first braided structures 41 and 42) and a four-strand single-layer braided structure (i.e., the second braided structure 43a). In yet another embodiment, the connecting assembly may include a four-strand two-layer braided structure (i.e., the first braided structures 41a and 42a) and a four-strand single-layer braided structure (i.e., the second braided structure 43a). This disclosure also includes durability tests conducted on artificial shuttlecocks made using the various types of braided structures described above. The test results are shown in Table 1.TABLE 1Durability test report for artificial shuttlecocks (SampleNos. A to D) with different types of connecting assembly,and a traditional feather shuttlecock (Sample No. E).Features of the ConnectingDurability (AverageSample No.AssemblyNumber of Smashes)A(1) Three-strand, two-layer15 smashes(2) Three-strand, single-layerB(1) Three-strand, two-layer14.5 smashes  (2) Four-strand, single-layerC(1) Four-strand, two-layer11 smashes(2) Four-strand, single-layerD(1) Four-strand, single-layer 7 smashes(2) Four-strand, single-layerE(1) Four-strand, single-layer 6 smashes(2) Four-strand, single-layer

[0033] Among them, the artificial shuttlecock labeled as sample No. A corresponds to the artificial shuttlecock 1 described in the previous embodiment, wherein the connecting assembly 40 includes a three-strand, two-layer braided structure (i.e., first braided structures 41 and 42) and a three-strand, single-layer braided structure (i.e., second braided structure 43). The artificial shuttlecock labeled as sample No. B includes a three-strand, two-layer braided structure (i.e., first braided structures 41 and 42) and a four-strand, single-layer braided structure (i.e., second braided structure 43a). The artificial shuttlecock labeled as sample No. C includes a four-strand, two-layer braided structure (i.e., first braided structures 41a and 42a) and a four-strand, single-layer braided structure (i.e., second braided structure 43a). The shuttlecock labeled as sample No. E is a traditional feather shuttlecock, which is made of natural feathers. Conventionally, the braided structure of natural feather shuttlecocks is typically composed of four intertwined strands (i.e., four-strand), and only in a single-layer configuration; thus, forming two sets of four-strand, single-layer braided structures. The artificial shuttlecock labeled as sample No. D mimics this configuration, incorporating two sets of four-strand, single-layer braided structures. It is also noted that aside from the differences in braided structure described above, the other structural features of the artificial shuttlecocks identified as sample Nos. A-D are identical.

[0034] Furthermore, the durability test was conducted by continuously performing smashes using the shuttlecocks identified as Sample Nos. A to E until either the stem or the connection to the base portion was damaged. The average number of smashes sustained was recorded. From the durability test results shown in Table 1, it is evident that when the artificial shuttlecock adopts a two-layer braided structure with tightly stacked thread layers (i.e., first braided structures 41 and 42 or 41a and 42a), its durability can be significantly improved. That is, the artificial shuttlecocks identified as sample Nos. A, B, and C with two-layer braided structures can withstand a higher average number of smashes compared to shuttlecocks identified as sample Nos. D and E with single-layer braided structures. Preferably, the artificial shuttlecocks identified as sample Nos. A and B, which have three-strand, two-layer braided structures (i.e., the first braided structures 41 and 42), exhibited an improvement in durability by more than two times, for example, increasing from approximately 6 smashes to 14.5 or 15 smashes.TABLE 2Hitting sensation test report for artificial shuttlecocks (SampleNos. A to D) with varying connecting assembly configurations.Net ShotOverallSampleFeatures of the ConnectingSensationEvaluationNo.Assembly(9-point scale)(9-point scale)A(1) Three-strand, two-layer6.3~7.26.8~7(2) Three-strand, single-layerB(1) Three-strand, two-layer6.26.2~7(2) Four-strand, single-layerC(1) Four-strand, two-layer7.67(2) Four-strand, single-layerD(1) Four-strand, single-layer5~6  5~6(2) Four-strand, single-layer

[0035] In addition, the “Net Shot Sensation (9-point scale)” column reflects user ratings based on the flight performance of the artificial shuttlecocks (sample Nos. A to D) during net shot techniques, with a maximum score of 9 points. During the user's hitting process, the evaluation was based on factors such as the number of rotations, the rate of spin of the shuttlecock, as well as the perceived elasticity and hardness during impact. The closer the performance resembled that of a traditional feather shuttlecock, the higher the score. Furthermore, the “Overall Evaluation (9-point scale)” column represents a comprehensive evaluation of the flight behavior and flight speed of the artificial shuttlecocks (sample Nos. A to D) during hitting. Similarly, better flight performance resulted in higher scores.

[0036] From the hitting sensation test results shown in Table 2, it can be seen that the artificial shuttlecocks (sample Nos. A, B, and C) with two closely stacked strands of braided structures (i.e., the first braided structures 41, 42 or 41a, 42a) exhibited superior performance in both trajectory control (net shot) and overall evaluation compared to the artificial shuttlecock (sample No. D) having a prior art single-layer braided structure.

[0037] As described above, the artificial shuttlecock according to the present disclosure comprises a base portion, a plurality of stems, a plurality of feathers, two first braided structures, and a second braided structure. Each stem comprises a base segment, a connecting segment, and a feather segment. The feathers are respectively connected to the feather segments of the stems. The two first braided structures are adjacently disposed on the connecting segments of the stems. The second braided structure is also disposed on the connecting segments of the stems and is spaced from the two first braided structures. The artificial shuttlecock features a structural design in which two tightly stacked braided structures (i.e., the first braided structures) are provided, thereby significantly enhancing the durability of the artificial shuttlecock and simultaneously improving the hitting feel.

[0038] Although the present disclosure has been explained in relation to its preferred embodiments, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the disclosure as hereinafter claimed.

Examples

Embodiment Construction

[0023]In order to make the structure, characteristics, and effectiveness of the disclosure further understood and recognized, a detailed description of the disclosure is provided as follows, along with embodiments and accompanying figures.

[0024]FIG. 1 is a perspective view of an artificial shuttlecock according to one embodiment of the present disclosure; and FIG. 2 is an exploded view of the artificial shuttlecock shown in FIG. 1. Please refer to FIG. 1 and FIG. 2. The artificial shuttlecock 1 of this embodiment comprises a base portion 10, a plurality of stems 20, a plurality of feathers 30, and a connecting assembly 40. One side of the base portion 10 has a semi-cylindrical structure. The base portion 10 includes a top surface 11 and a convex surface 12 located on opposite sides thereof. The convex surface 12 is the outer surface of the semi-cylindrical structure, and the top surface 11 is configured to receive insertion of the stems 20. Preferably, the base portion 10 further in...

Claims

1. An artificial shuttlecock, comprising:a base portion;a plurality of stems, being spaced at intervals on the base portion, each of the stems comprising a base segment, a connecting segment, and a feather segment, the connecting segment being located between the base segment and the feather segment, and the base segment being inserted into the base portion;a plurality of feathers, each connected to the feather segment of the respective stem;two first braided structures, adjacently disposed on the connecting segments of the stems; anda second braided structure, disposed on the connecting segments of the stems and spaced apart from the two first braided structures.

2. The artificial shuttlecock according to claim 1, wherein a minimum distance from the two first braided structures to the base segment is less than a minimum distance from the second braided structure to the base segment.

3. The artificial shuttlecock according to claim 1, wherein a minimum distance from the two first braided structures to the base segment is greater than a minimum distance from the second braided structure to the feather segment.

4. The artificial shuttlecock according to claim 1, wherein each of the two first braided structures is formed by braiding three filaments.

5. The artificial shuttlecock according to claim 4, wherein the second braided structure is formed by braiding three filaments.

6. The artificial shuttlecock according to claim 4, wherein the second braided structure formed by braiding four filaments.

7. The artificial shuttlecock according to claim 1, wherein each of the two first braided structures is formed by braiding four filaments.

8. The artificial shuttlecock according to claim 7, wherein the second braided structure is formed by braiding four filaments.

9. The artificial shuttlecock according to claim 1, wherein the two first braided structures and the second braided structure are wound around the connecting segments of the stems.

10. The artificial shuttlecock according to claim 1, wherein the stems are made of carbon fiber reinforced resin material.

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