TWI711479B - Artificial shuttlecock and feather stem thereof - Google Patents

Abstract

The present invention discloses an artificial shuttlecock, which includes a base portion, a plurality of feathers, and a plurality of stems. Each stem has a base end and a feather end, which are opposite to each other. The base end connects to the base portion, and the feather end connects to one of the feathers. Each stem includes a main body and a first extension part, and the first extension part is disposed on one side of the main body. The main body and the first extension part are tapered off from the base end to the feather end. The rigidity and the counterweight of the stem of the present invention are close to the stem of natural feather, such that the performance of the artificial shuttlecock can be more close to the natural feather shuttlecock.

Description

Artificial badminton and its hair shaft

The present invention relates to an artificial shuttlecock, and particularly relates to a hair shaft of an artificial shuttlecock.

Badminton is a common and popular ball game, and the players use badminton as a game method. The main structure of traditional badminton is that natural feathers are combined with the head. Among them, natural feathers are mostly goose feathers or duck feathers, which are bleached and screened before being made into shuttlecocks. However, it is more and more difficult to obtain natural feathers, and the screening procedures are complicated and labor-intensive. Therefore, there are also artificial shuttlecocks on the market, trying to solve the problem of shortage of natural feathers and complicated selection.

However, most artificial shuttlecocks are made of nylon instead of natural feathers, and the structure of the soft ball supports the airflow generated during the blow. However, the performance of the artificial shuttlecock made of this soft ball rack is not as good as that of the shuttlecock made of natural feathers (hereinafter referred to as natural shuttlecock). For example, the impact resistance, the possible hitting speed and the hitting touch are difficult for users. Accepted.

In order to solve the aforementioned problems, the badminton manufacturer has even proposed an artificial shuttlecock, which is made of plastic and made into a hair piece and a hair shaft. The raw pieces are attached to the hair shaft and then assembled to the head. The softer rack provided by this plastic artificial shuttlecock is better, but it is still not as good as the natural shuttlecock, so there is still room for improvement.

In view of the above-mentioned problems, the main purpose of the present invention is to provide an artificial shuttlecock and its hair shaft. Due to the design of the hair shaft, the artificial shuttlecock is better and closer to the performance of the natural shuttlecock, and solves the problem of the conventional artificial shuttlecock. The problem of poor performance.

In order to achieve the above objective, the present invention provides an artificial shuttlecock, which includes a ball head, a plurality of wool pieces and a plurality of wool rods. The hair rods respectively have a ball head end and a hair piece end, the ball head end is connected to the ball head, and the hair piece end is connected to one of the hair pieces. Each hair rod includes a body and a first extension part. The main body has a relatively first side and a second side, and the main body gradually shrinks from the ball head end to the wool piece end. The body has a first width and a first height at the ball head end, and the body has a second width and a second height at the wool piece end. The difference between the first width and the second width is between 0.1 mm and 0.35 mm. The difference between the first height and the second height is between 0.3 mm and 0.75 mm. The first extension part is arranged on the first side of the main body and tapers from the ball head end to the wool piece end. The first extension part has a third width at the ball head end and a fourth width at the fur piece end. The third width and the fourth width are greater than the first width.

In order to achieve the above-mentioned object, the present invention also provides a hair shaft applied to an artificial badminton. The artificial badminton includes a ball head, a plurality of hair pieces and a plurality of the hair shafts. The hair rods respectively have a ball head end and a hair piece end, the ball head end is connected to the ball head, and the hair piece end is connected to one of the hair pieces. Each hair rod includes a body and a first extension part. The main body has a relatively first side and a second side, and the main body gradually shrinks from the ball head end to the wool piece end. The body has a first width and a first height at the ball head end, and the body has a second width and a second height at the wool piece end. The difference between the first width and the second width is between 0.1 mm and 0.35 mm. The difference between the first height and the second height is between 0.3 mm and 0.75 mm. The first extension part is arranged on the first side of the main body and tapers from the ball head end to the wool piece end. The first extension part has a third width at the ball head end and a fourth width at the fur piece end. The third width and the fourth width are greater than the first width.

According to an embodiment of the present invention, the first width is between 0.5 mm and 0.7 mm, and the second width is between 0.25 mm and 0.4 mm.

According to an embodiment of the present invention, the third width is between 1.2 mm and 1.4 mm, and the fourth width is between 0.6 mm and 0.75 mm.

According to an embodiment of the present invention, the first extension has a first thickness at the end of the ball, the first thickness is between 0.2 mm and 0.3 mm, the first extension has a second thickness at the end of the raw piece, and the second The thickness is between 0.1 mm and 0.18 mm.

According to an embodiment of the present invention, the first extension portion has two opposite first arc-shaped side walls.

According to an embodiment of the present invention, the hair shaft further includes a second extension portion, which is disposed on the second side of the main body and tapers from the ball head end to the hair piece end. The second extension part has a fifth width at the ball head end and a sixth width at the wool piece end. The fifth width is greater than the first width, and the sixth width is greater than or equal to the second width.

According to an embodiment of the present invention, the fifth width is substantially equal to the third width, and the sixth width is substantially equal to the fourth width.

According to an embodiment of the present invention, the fifth width is substantially equal to the third width, and the sixth width is substantially equal to the second width.

According to an embodiment of the present invention, the second extension portion has two opposite second arc-shaped side walls.

According to an embodiment of the present invention, the second extension portion has a third thickness at the ball head end, and the third thickness is between 0.2 mm and 0.3 mm. The second extension part has a fourth thickness at the end of the raw piece, and the fourth thickness is between 0.1 mm and 0.18 mm.

As mentioned above, according to the artificial badminton shuttlecock and its hair shaft of the present invention, the ball head end of the hair shaft is connected to the ball head, and the hair piece end is connected to the hair piece. The hair shaft includes a body and a first extension part, and the body and the first extension part are tapered from the ball head end to the hair piece end. In addition, the main body has a first width and a first height at the ball head end, and the main body has a second width and a second height at the wool piece end. The difference between the first width and the second width is between 0.1 mm and 0.35 mm. The difference between the first height and the second height is between 0.3 mm and 0.75 mm. Due to the configuration and size restriction of the body and the first extension part, the overall rigidity and weight of the hair shaft is close to that of a natural badminton, and the performance of the artificial badminton made by the hair shaft of the present invention is closer to Natural badminton.

In order to allow your review committee to better understand the technical content of the present invention, preferred specific embodiments are described as follows.

Fig. 1 is a three-dimensional schematic diagram of a shuttlecock according to the first embodiment of the present invention, Fig. 2 is a schematic diagram of the hair shaft shown in Fig. 1, Fig. 3 is a right side view of the hair shaft shown in Fig. 2, and Fig. 4 is shown in Fig. 2 Left view of the hair rod. Please refer to FIGS. 1 and 2. The artificial badminton 1 of this embodiment includes a plurality of hair shafts 10, a ball head 20 and a plurality of hair pieces 30. The hair shaft 10 has a ball head end 11 and a hair piece end 12 opposite to each other. The ball head end 11 is connected to the ball head 20, and the hair piece end 12 is connected to one of the plurality of hair pieces 30. In other words, the ball head end 11 of each hair rod 10 is connected to the ball head 20, and the hair piece end 12 is connected to the hair piece 30. It should be noted that, in this embodiment, the end of the hair rod 10 connected to the hair piece 30 is called the hair piece end 12, and the hair piece 30 is connected to the hair piece end 12 from the center of the hair rod 10. Among them, FIG. 3 shows the front surface of the ball end 11, and FIG. 4 shows the front surface of the raw piece end 12.

In this embodiment, the hair rod 10 includes a main body 13 and a first extending portion 14. The main body 13 is a quadrangular cylinder, and the first extending portion 14 is located on one side of the main body 13. Specifically, the main body 13 has a first side 131 and a second side 132 opposite to each other, as shown in FIG. 3. From the perspective of FIG. 3, the first side 131 is the upper side, and the second side 132 is the lower side. It should be noted that the main body 13 and the first extension 14 of this embodiment are integrated, that is, the hair rod 10 is formed in an integral manner, so the first side 131 and the second side 132 of the main body 13 are shown by dotted lines. . In a specific embodiment of the present invention, the hair rod 10 is made of composite material and plastic material, wherein the density of the composite material is between 1.3 g/cm ³ to 1.5 g/cm ³ and the density of the plastic material is between Between 1.10 g/cm ³ and 1.46 g/cm ³ , but the present invention is not limited to this.

In addition, the first extension 14 is disposed on the first side 131 of the main body 13, and the overall width of the first extension 14 is larger than that of the main body 13 to form a configuration extending from the main body 13 to the left and right. In this embodiment, the main body 13 has a configuration that tapers from the ball head end 11 to the wool piece end 12. 3 and 4, the main body 13 has a first width W1 and a first height H1 at the ball end 11, and the main body 13 has a second width W2 and a second height H2 at the wool end 12. Wherein, the second width W2 is greater than the second width W2, and the first height H1 is greater than the second height H2, so as to form a configuration that tapers from the ball head end 11 to the wool piece end 12.

In this embodiment, the degree of taper is further defined. Specifically, the difference between the first width W1 and the second width W2 may be between 0.1 millimeters (mm) and 0.35 mm, and the difference between the first height H1 and the second height H2 may be between 0.3 mm and 0.75. Between millimeters. In a specific embodiment of the present invention, the first width W1 can be between 0.5 mm and 0.7 mm, preferably 0.53 mm; the second width W2 is between 0.25 mm and 0.4 mm, preferably 0.37 mm. The difference between the first width W1 and the second width W2 may preferably be 0.16 mm. In addition, the first height H1 may be between 1.2 mm and 1.4 mm, preferably 1.32 mm; and the second height H2 may be between 0.7 mm and 0.9 mm, preferably 0.84 mm. The difference between the first height H1 and the second height H2 may preferably be 0.48 mm.

In this embodiment, the first extension portion 14 is also a configuration that tapers from the ball head end 11 to the wool piece end 12. Specifically, the first extension portion 14 has a third width W3 at the ball end 11 and a fourth width W4 at the wool end 12. Wherein, the third width W3 is greater than the fourth width W4 to form a configuration that tapers from the ball head end 11 to the wool piece end 12. In a specific embodiment of the present invention, the third width W3 may be between 1.2 mm and 1.4 mm, preferably 1.3 mm; the fourth width W4 may be between 0.6 mm and 0.75 mm, preferably 0.67 mm . In addition, since the first extension portion 14 extends outward from the main body 13, the third width W3 and the fourth width W4 are both greater than the first width W1. With the arrangement of the first extension 14 and the configuration that the main body 13 and the first extension 14 are tapered from the ball head end 11 to the hair piece end 12, the artificial hair rod 10 of this embodiment is made The shuttlecock 1 can exert performance close to that of a natural shuttlecock.

In this embodiment, the overall thickness of the first extension portion 14 is smaller than the overall height of the main body 13. Specifically, the first extension portion 14 has a first thickness T1 at the ball end 11, and the first thickness T1 may be between 0.2 mm and 0.3 mm, preferably 0.28 mm. In addition, the first extension portion 14 has a second thickness T2 at the raw piece end 12, and the second thickness is between 0.1 mm and 0.18 mm, preferably 0.15 mm.

Preferably, the hair rod 10 of this embodiment further includes a second extension portion 15 disposed on the second side 132 of the main body 13. Similarly, the second extension 150 is also in a configuration that tapers from the ball head end 11 to the wool piece end 12. Specifically, the second extension portion 15 has a fifth width W5 at the ball end 11 and a sixth width W6 at the fluff end 12, and the fifth width W5 is greater than the sixth width W6.

Preferably, the fifth width W5 of the second extension portion 15 at the ball end 11 of the present embodiment is greater than the first width W1 of the body 13, and the fifth width W5 is substantially equal to the third width W3 of the first extension portion 14. . Moreover, the sixth width W6 of the second extension portion 15 at the ball head end 11 is substantially equal to the second width W2 of the main body 13. In other words, the second extension 15 extends outward from the left and right sides of the main body 13 at the ball end 11, and is tapered to have the same width (the second width W2) as the main body 13 at the raw piece end 12, as shown in the figure 4 shown.

The second extension portion 15 of the present embodiment has a third thickness T3 at the ball end 11, which may be between 0.2 mm and 0.3 mm. Preferably, the third thickness T3 is 0.28 mm, which is substantially the same as the first thickness T1 of the first extension portion 14. In addition, the second extending portion 15 has a fourth thickness T4 at the raw piece end 12, which may be between 0.1 mm and 0.18 mm. Preferably, the fourth thickness T4 is 0.15 mm, which is substantially the same as the second thickness T2 of the first extension portion 14.

Fig. 5A is a schematic diagram of the hair rod of the second embodiment of the present invention, Fig. 5B is a right view of the hair rod shown in Fig. 5A, and Fig. 5C is a left view of the hair rod shown in Fig. 5A, please refer to Figs. 5A, As shown in Figure 5B and Figure 5C. The hair rod 10a of this embodiment also includes a main body 13a, a first extension portion 14a and a second extension portion 15a, and is tapered from the ball head end 11a to the hair piece end 12a. The difference from the hair rod 10a of the first embodiment is that the degree of taper of the second extension portion 15a is substantially the same as that of the first extension portion 14a. In terms of body, the second extension portion 15a extends outward from the left and right sides of the main body 13a at both the ball head end 11a and the wool piece end 12a. That is, the overall width of the second extension 15a is greater than the overall width of the main body 13a, that is, the sixth width W6 of the second extension 15a at the fluff end 12a is greater than the second width W2 of the main body 13a, and the sixth width W6 is substantially equal to The fourth width W4 of the first extension 14a is as shown in FIG. 5C.

In this embodiment, the first width W1 is preferably 0.53 mm; the second width W2 is preferably 0.29 mm. The difference between the first width W1 and the second width W2 may preferably be 0.24 mm. In addition, the first height H1 is preferably 1.32 mm; and the second height H2 is preferably between 0.72 mm and 0.73 mm. The difference between the first height H1 and the second height H2 may preferably be between 0.59 and 0.6 mm. The third width W3 is preferably 1.28 mm, and the fifth width W5 is substantially equal to the third width W3. The fourth width W4 may preferably be between 0.7 mm and 0.71 mm, and the sixth width W6 is substantially equal to the fourth width W4. In this embodiment, the first thickness T1 and the third thickness T3 are preferably 0.285 mm; the second thickness T2 and the fourth thickness T4 are preferably between 0.155 mm and 0.16 mm. In addition, for other structural details of the hair rod 10a, please refer to the hair rod 10 of the first embodiment, which will not be repeated here.

As shown in FIGS. 2 and 5C, preferably, the first extension portions 14, 14a of the first embodiment and the second embodiment have two opposite first arc-shaped side walls 141, 141a. That is, the side walls on the left and right sides of the first extension portions 14 and 14a are arc structures with R angles. Similarly, the second extensions 15, 15a have two opposite second arc-shaped side walls 151, 151a, that is, the sidewalls of the second extensions 15, 15a have an arc-shaped structure with an R angle, preferably, the arc of the R angle It can be between 0.27 and 0.28.

FIG. 6 is a schematic diagram of the hair rod of the third embodiment of the present invention, please refer to FIG. 6. In this embodiment, the first extension portion 14b and the second extension portion 15b of the hair rod 10b may also have flat side walls, that is, an arc structure without an R angle, and the present invention is not limited. In addition, for other structural details of the hair rod 10b, please refer to the hair rod 10 of the first embodiment or the hair rod 10b of the second embodiment, which will not be repeated here.

FIG. 7A is a schematic diagram of the hair rod of the fourth embodiment of the present invention, FIG. 7B is a right view of the hair rod shown in FIG. 7A, and FIG. 7C is a left view of the hair rod shown in FIG. 7A. Please refer to FIGS. 7A and 7 As shown in Figure 7B and Figure 7C. In this embodiment, the hair shaft 10c may not have the second extension part, but only the first extension part 14c, so that the hair piece end 12c (or the ball end 11c) has a T-shaped structure, which can also be close to the natural badminton The effect of the performance. In this embodiment, the first width W1 is preferably between 0.69 mm and 0.70 mm; the second width W2 is preferably between 0.37 mm and 0.38 mm. The difference between the first width W1 and the second width W2 may preferably be between 0.31 mm and 0.33 mm. In addition, the first height H1 is preferably between 1.56 mm and 1.57 mm; and the second height H2 is preferably 0.85 mm. Preferably, the difference between the first height H1 and the second height H2 may be between 0.72 and 0.72 mm. The third width W3 is preferably between 1.2 mm and 1.3 mm; the fourth width W4 is preferably 0.68 mm. In this embodiment, the first thickness T1 is preferably between 0.27 mm and 0.28 mm; the second thickness T2 is preferably 0.15 mm. In addition, for other structural details of the hair rod 10c, please refer to the hair rod 10 of the first embodiment, which will not be repeated here.

FIG. 8A is a rigid test diagram of the hair shaft of the first embodiment of the present invention, the natural shuttlecock and the hair shaft of the commercially available artificial shuttlecock. Please refer to FIG. 8A. The rigidity test is before the hair rod (including the hair rod of natural badminton, the hair rod of the commercially available brand A badminton, the hair rod 10 of the first embodiment, the hair rod 10a of the second embodiment, the hair rod 10c of the fourth embodiment ) Define multiple intercept points (here, test points), and measure the displacement of each intercept point after loading heavy objects on both ends of the hair rod. After connecting the displacement of each intercept point, the rigidity trend curve of the hair rod can be obtained. As shown in FIG. 8A, the hair shaft 10 of the first embodiment, the hair shaft 10a of the second embodiment, and the hair shaft 10c of the fourth embodiment have similar rigidity trend curves to the hair shaft of a natural shuttlecock. In other words, the rigidity of the hair shafts 10, 10a and 10c is close to that of a natural badminton shuttlecock.

FIG. 8B is a weight diagram of the hair shaft of the hair shaft and the natural badminton shuttlecock and the commercially available artificial shuttlecocks according to the first embodiment of the present invention. Please refer to FIG. 8B. The measurement of the weight of the hair rod also precedes the hair rod (including the hair rod of the natural badminton, the hair rod of the commercially available brand A badminton, the hair rod 10 of the first embodiment, the hair rod 10a of the second embodiment and the fourth The hair rod 10c of the embodiment defines a plurality of intercept points (here, the cutting points), and the hair rod fragments at different positions are obtained after cutting. Then the hair rod fragments at each position are weighed to obtain the configuration shown in FIG. 8B Heavy curve graph. Among them, the hair shaft 10 of the first embodiment, the hair shaft 10a of the second embodiment, and the hair shaft 10c of the fourth embodiment have similar weight curves to the hair shaft of a natural badminton. In other words, the first embodiment The weights of the hair rods 10, 10a and 10c are close to the hair rods of natural badminton.

In summary, according to the artificial badminton shuttlecock and its hair shaft of the present invention, the ball head end of the hair shaft is connected to the ball head, and the hair piece end is connected to the hair piece. The hair shaft includes a body and a first extension part, and the body and the first extension part are tapered from the ball head end to the hair piece end. In addition, the main body has a first width and a first height at the ball head end, and the main body has a second width and a second height at the wool piece end. The difference between the first width and the second width is between 0.1 mm and 0.35 mm. The difference between the first height and the second height is between 0.3 mm and 0.75 mm. Due to the configuration and size restriction of the body and the first extension part, the overall rigidity and weight of the hair shaft is close to that of a natural badminton, and the performance of the artificial badminton made by the hair shaft of the present invention is closer to Natural badminton.

It should be noted that many of the foregoing embodiments are given as examples for the convenience of description, and the scope of rights claimed in the present invention should be subject to the scope of the patent application, rather than limited to the foregoing embodiments.

1: Artificial badminton

10, 10a, 10b, 10c: hair rod

11, 11a, 11b, 11c: ball end

12, 12a, 12b, 12c: raw end

13, 13a, 13b, 13c: body

131: First side

132: second side

14, 14a, 14b, 14c: first extension

141, 141a: first curved side wall

15, 15a, 15b, 15c: second extension

151, 151a: second curved side wall

20: ball head

30: raw film

H1: first height

H2: second height

T1: first thickness

T2: second thickness

T3: third thickness

T4: Fourth thickness

W1: first width

W2: second width

W3: third width

W4: Fourth width

W5: fifth width

W6: sixth width

Fig. 1 is a perspective view of a shuttlecock according to a first embodiment of the present invention. Fig. 2 is a schematic diagram of the hair rod shown in Fig. 1. Figure 3 is a right side view of the hair rod shown in Figure 2; Figure 4 is a left side view of the hair bar shown in Figure 2; Fig. 5A is a schematic diagram of the hair rod of the second embodiment of the present invention. Figure 5B is a right side view of the hair rod shown in Figure 5A. Fig. 5C is a left side view of the hair rod shown in Fig. 5A. Fig. 6 is a schematic diagram of the hair rod of the third embodiment of the present invention. Fig. 7A is a schematic diagram of the hair rod of the fourth embodiment of the present invention. Fig. 7B is a right side view of the hair rod shown in Fig. 7A. Fig. 7C is a left side view of the hair rod shown in Fig. 7A. FIG. 8A is a diagram showing the rigidity test of the hair shaft of the first embodiment of the present invention, the natural shuttlecock and the hair shaft of the commercially available artificial shuttlecock. FIG. 8B is a diagram showing the weight of the hair shaft of the first embodiment of the present invention, the natural shuttlecock and the hair shaft of the commercially available artificial shuttlecock.

10: hair rod

11: ball end

12: raw end

13: body

14: first extension

141: First curved side wall

15: second extension

151: second curved side wall

Claims (18)

An artificial badminton, comprising: a ball head; a plurality of wool pieces; and plural hair rods, respectively having a ball head end and a wool piece end, the ball head end is connected to the ball head, the wool piece end is connected to the wool pieces One of them, each of the hair rods includes: a body having a first side and a second side opposite to each other, the body tapers from the ball head end to the hair piece end, and the body has a ball head end A first width and a first height, the body has a second width and a second height at the end of the raw piece, the difference between the first width and the second width is between 0.1 mm and 0.35 mm, the first The difference between a height and the second height is between 0.3 mm and 0.75 mm; and a first extension portion is disposed on the first side of the body and tapers from the ball head end to the raw piece end, The first extension has a third width at the ball head end and a fourth width at the raw piece end. The third width and the fourth width are greater than the first width. The first extension is at the ball end. The head end has a first thickness, the first thickness is between 0.2 mm and 0.3 mm, and the first extension has a second thickness at the raw piece end, and the second thickness is between 0.1 mm and 0.18 mm . The artificial shuttlecock described in item 1 of the scope of patent application, wherein the first width is between 0.5 mm and 0.7 mm, and the second width is between 0.25 mm and 0.4 mm. In the artificial shuttlecock described in item 1 of the scope of patent application, the third width is between 1.2 mm and 1.4 mm, and the fourth width is between 0.6 mm and 0.75 mm. The artificial shuttlecock described in the first item of the scope of patent application, wherein the first extension portion has two opposite first arc-shaped side walls. As for the artificial badminton shuttlecock described in item 1 of the scope of patent application, the hair shaft further includes a second extension part, which is arranged on the second side of the main body and tapers from the ball head end to the hair piece end. The two extension parts have a fifth width at the ball head end and a sixth width at the raw piece end. The fifth width is greater than the first width, and the sixth width is greater than or equal to the second width. As for the artificial badminton described in item 5 of the scope of patent application, the fifth width is substantially equal to the third width, and the sixth width is substantially equal to the fourth width. The artificial shuttlecock described in item 5 of the scope of patent application, wherein the fifth width is substantially equal to the third width, and the sixth width is substantially equal to the second width. The artificial shuttlecock described in item 5 of the scope of patent application, wherein the second extension portion has two opposite second arc-shaped side walls. The artificial badminton according to claim 5, wherein the second extension has a third thickness at the head end of the ball, and the third thickness is between 0.2 mm and The second extension portion has a fourth thickness at the end of the raw piece between 0.3 mm, and the fourth thickness is between 0.1 mm and 0.18 mm. A hair rod is applied to an artificial badminton. The artificial badminton comprises a ball head, a plurality of hair pieces and a plurality of the hair rods. The hair rods respectively have a ball head end and a hair piece end opposite to each other. The ball head end is connected to the A ball head, the hair piece end is connected to one of the hair pieces, each of the hair rods includes a body having a first side and a second side opposite to each other, and the body extends from the ball head end to the hair piece end Taper, the body has a first width and a first height at the ball end, the body has a second width and a second height at the raw piece end, the difference between the first width and the second width Between 0.1 mm and 0.35 mm, the difference between the first height and the second height is between 0.3 mm and 0.75 mm; and a first extension part disposed on the first side of the body, and From the ball head end to the raw piece end, the first extension has a third width at the ball head end and a fourth width at the raw piece end. The third width and the fourth width are greater than the A first width, the first extension has a first thickness at the ball head end, the first thickness is between 0.2 mm and 0.3 mm, the first extension has a second thickness at the raw piece end, the The second thickness is between 0.1 mm and 0.18 mm. As described in claim 10, the first width is between 0.5 mm and 0.7 mm, and the second width is between 0.25 mm and 0.4 mm. According to the tenth item of the scope of patent application, the third width is between 1.2 mm and 1.4 mm, and the fourth width is between 0.6 mm and 0.75 mm. According to the hair rod described in claim 10, the first extension portion has two opposite first arc-shaped side walls. As described in the tenth item of the scope of patent application, the hair rod further includes a second extension part, which is arranged on the second side of the body and tapers from the ball head end to the hair piece end. The two extension parts have a fifth width at the ball head end and a sixth width at the raw piece end. The fifth width is greater than the first width, and the sixth width is greater than or equal to the second width. As for the hair rod described in claim 14, wherein the fifth width is substantially equal to the third width, and the sixth width is substantially equal to the fourth width. As for the hair rod described in claim 14, wherein the fifth width is substantially equal to the third width, and the sixth width is substantially equal to the second width. According to the hair rod described in item 14 of the scope of patent application, the second extension portion has two opposite second arc-shaped side walls. As described in claim 14, wherein the second extension has a third thickness at the end of the ball, the third thickness is between 0.2 mm and 0.3 mm, and the second extension is at The raw piece end has a fourth thickness, and the fourth thickness is between 0.1 mm and 0.18 mm.

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