CN212038883U

CN212038883U - Artificial badminton and feather pole thereof

Info

Publication number: CN212038883U
Application number: CN202020188766.8U
Authority: CN
Inventors: 陈庶荣; 王子玮; 王馨侦; 张镇宇
Original assignee: Victory Sports Co ltd
Current assignee: Victory Sports Co ltd
Priority date: 2019-06-13
Filing date: 2020-02-20
Publication date: 2020-12-01
Anticipated expiration: 2030-02-20
Also published as: CN112076451A; TWI711479B; TW202045226A

Abstract

The utility model discloses an artificial badminton and feather pole thereof, this artificial badminton include a bulb, a plurality of workprints and a plurality of feather pole. The hair shaft is provided with a ball end and a hair piece end which are opposite. The ball head end is connected with the ball head, and the hair piece end is connected with one of the hair pieces. Each bristle bar comprises a body and a first extending part, wherein the first extending part is arranged on one side of the body. The body and the first extension part are gradually reduced from the ball head end to the hair piece end. Through the configuration of body and first extension, make the utility model discloses a feather pole's rigidity and counter weight are close to in the feather pole of natural badminton to make artificial badminton's performance more close to in natural badminton.

Description

Artificial badminton and feather pole thereof

Technical Field

The utility model relates to an artificial badminton, in particular to a feather pole of an artificial badminton.

Background

Badminton is a common and popular ball game, and players play badminton as a game. The main structure of the traditional badminton is that natural feather is combined with a badminton head. Wherein, most of the natural feather is goose feather or duck feather, and is bleached and screened to form feather balls. However, the acquisition of natural feathers is becoming more and more difficult and the screening process is laborious and labor-consuming. Therefore, some artificial shuttlecocks are also available in the market, and attempt to solve the problems of natural feather shortage and complicated screening.

However, most artificial shuttlecocks have a soft frame made of nylon instead of natural feather, and the air flow generated during striking is carried by the structure of the soft frame. However, the performance of the artificial shuttlecock made of such a soft frame is inferior to that of a natural feather shuttlecock (hereinafter referred to as a natural shuttlecock), such as impact resistance, a striking speed and a striking feeling, and is not acceptable to users.

To solve the above problems, badminton manufacturers have proposed an artificial badminton, which is made of plastic and made into a feather piece and a feather rod, respectively, and the feather piece is attached to the feather rod and then assembled to the head. The plastic artificial shuttlecock provides a softer frame, but still not as good as the natural shuttlecock, so there is still room for improvement.

SUMMERY OF THE UTILITY MODEL

In view of the above, the main objective of the present invention is to provide an artificial badminton and its feather rod, which provides the artificial badminton with better performance and closer to the natural badminton through the design of the feather rod, and solves the problem of poor performance of the conventional artificial badminton.

To achieve the above objective, the present invention provides an artificial badminton, which comprises a badminton head, a plurality of feather pieces and a plurality of feather rods. The hair rod is provided with a ball head end and a hair piece end which are opposite, the ball head end is connected with the ball head, and the hair piece end is connected with one of the hair pieces. Each bristle bar comprises a body and a first extending part. The body is provided with a first side and a second side which are opposite, and the body is gradually reduced from the ball head end to the hair piece end. The body has a first width and a first height at the ball end, and a second width and a second height at the burr 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 extending part is arranged on the first side of the body and gradually shrinks from the ball head end to the hair piece end. The first extending part has a third width at the ball end and a fourth width at the burr end, and the third width and the fourth width are larger than the first width.

In order to achieve the above object, the present invention further provides a feather rod for an artificial badminton, wherein the artificial badminton comprises a head, a plurality of feather pieces and a plurality of feather rods. The hair rod is provided with a ball head end and a hair piece end which are opposite, the ball head end is connected with the ball head, and the hair piece end is connected with one of the hair pieces. Each bristle bar comprises a body and a first extending part. The body is provided with a first side and a second side which are opposite, and the body is gradually reduced from the ball head end to the hair piece end. The body has a first width and a first height at the ball end, and a second width and a second height at the burr 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 extending part is arranged on the first side of the body and gradually shrinks from the ball head end to the hair piece end. The first extending part has a third width at the ball end and a fourth width at the burr end, and the third width and the fourth width are larger than the first width.

According to an embodiment of the present invention, the first width is between 0.5 mm to 0.7 mm, and the second width is between 0.25 mm to 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 extending portion has a first thickness at the ball end, the first thickness is between 0.2 mm to 0.3 mm, the first extending portion has a second thickness at the hair piece end, and the second thickness is between 0.1 mm to 0.18 mm.

According to an embodiment of the present invention, the first extending portion has two first arc-shaped sidewalls opposite to each other.

According to an embodiment of the present invention, the bristle bar further includes a second extending portion disposed at the second side of the body and gradually reduced from the ball head end to the bristle piece end. The second extending portion has a fifth width at the ball end and a sixth width at the blade 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 extending portion has two second arc-shaped sidewalls opposite to each other.

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

Bear the upper, according to the utility model discloses an artificial badminton and feather pole, the bulb end of feather pole utensil is connected in the bulb, and the workprint end is connected in the workprint. The bristle bar comprises a body and a first extension part, and the body and the first extension part are gradually reduced from the ball head end to the bristle piece end. The body has a first width and a first height at the ball end, and a second width and a second height at the burr 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. Configuration and size restriction through body and first extension for the whole rigidity and the counter weight of feather pole are close to in the feather pole of natural badminton, and with the utility model discloses an artificial badminton's that feather pole was made performance is closer to in natural badminton.

Drawings

Fig. 1 is a schematic perspective view of a shuttlecock according to a first embodiment of the present invention.

FIG. 2 is a schematic view of the hair shaft shown in FIG. 1.

FIG. 3 is a right side view of the hair shaft shown in FIG. 2.

FIG. 4 is a left side view of the hair shaft shown in FIG. 2.

Fig. 5A is a schematic view of a hair shaft according to a second embodiment of the present invention.

FIG. 5B is a right side view of the hair shaft shown in FIG. 5A.

FIG. 5C is a left side view of the hair shaft shown in FIG. 5A.

Fig. 6 is a schematic view of a hair shaft according to a third embodiment of the present invention.

Fig. 7A is a schematic view of a hair shaft according to a fourth embodiment of the present invention.

FIG. 7B is a right side view of the hair shaft shown in FIG. 7A.

FIG. 7C is a left side view of the hair shaft shown in FIG. 7A.

Fig. 8A is a rigidity test chart of the shaft of the first embodiment of the present invention, the shafts of a natural badminton and a commercially available artificial badminton.

Fig. 8B is a weight diagram of the shaft of the first embodiment of the present invention, the natural shuttlecock, and the shaft of the commercially available artificial shuttlecock.

Wherein, the reference numbers:

artificial badminton 1

feather pole

10, 10a, 10b, 10c

Ball end

11, 11a, 11b,

11c butt end

12, 12a, 12b, 12c

First side 131 of

body

13, 13a, 13b, 13c

Second side 132

first extension

14, 14a, 14b, 14c

First

curved sidewall

141, 141a

second extension

15, 15a, 15b, 15c

Second arc-shaped

side wall

151, 151a ball 20

First height H1 of wool top 30

Second height H2 first thickness T1

Second thickness T2 third thickness T3

Fourth thickness T4 first width W1

Second width W2 third width W3

Fourth Width W4 fifth Width W5

Sixth width W6

Detailed Description

To better understand the technical content of the present invention, preferred embodiments are specifically illustrated as follows.

Fig. 1 is a schematic perspective view of a shuttlecock according to a first embodiment of the present invention, fig. 2 is a schematic view of a feather rod shown in fig. 1, fig. 3 is a right side view of the feather rod shown in fig. 2, and fig. 4 is a left side view of the feather rod shown in fig. 2. Referring to fig. 1 and 2, an artificial badminton 1 of the present embodiment includes a plurality of shafts 10, a head 20 and a plurality of blades 30. The hair shaft 10 has a ball end 11 and a hair end 12 opposite to each other, the ball end 11 is connected to the ball head 20, and the hair end 12 is connected to one of the hair pieces 30. In other words, ball end 11 of each shaft 10 is connected to ball 20, while blade end 12 is connected to blade 30. It should be noted that, in this embodiment, the end of the hair shaft 10 connected to the hair piece 30 is referred to as a hair piece end 12, and the hair piece 30 is connected to the hair piece end 12 from the central position of the hair shaft 10. Wherein fig. 3 shows the front of the ball end 11 and fig. 4 shows the front of the blade end 12.

In this embodiment, the hair shaft 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 body 13 has a first side 131 and a second side 132 opposite to each other, as shown in fig. 3. In the perspective of fig. 3, the first side 131 is an upper side and the second side 132 is a lower side. It should be noted that the main body 13 and the first extending portion 14 of the present embodiment are integrated, that is, they are formed integrallyThe first side 131 and the second side 132 of the body 13 are shown in phantom because the hair shaft 10 is formed. In the embodiment of the present invention, the hair shaft 10 is made of composite material and plastic material, wherein the density of the composite material is between 1.3g/cm³To 1.5 g/cm³While the density of the plastic material is between 1.10g/cm³To 1.46g/cm³However, the present invention is not limited thereto.

The first extending portion 14 is disposed on the first side 131 of the body 13, and the overall width of the first extending portion 14 is greater than that of the body 13, so as to form a configuration extending from the left and right sides of the body 13. In the present embodiment, the body 13 is tapered from the ball end 11 to the blade end 12. Referring to fig. 3 and 4, the body 13 has a first width W1 and a first height H1 at the ball end 11, and the body 13 has a second width W2 and a second height H2 at the hair end 12. Wherein the first width W1 is greater than the second width W2, and the first height H1 is greater than the second height H2 to form a configuration that tapers from the ball end 11 to the blade end 12.

In this embodiment, the degree of tapering is further defined. Specifically, the difference between the first width W1 and the second width W2 may be between 0.1 millimeter (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 mm. In one embodiment of the present invention, the first width W1 may 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 be preferably 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 be preferably 0.48 mm.

In the present embodiment, the first extension 14 is also tapered from the ball end 11 to the blade end 12. Specifically, the first extending portion 14 has a third width W3 at the ball end 11 and a fourth width W4 at the blade end 12. Wherein the third width W3 is greater than the fourth width W4 to form a configuration that tapers from the ball end 11 to the blade end 12. In an 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 extending portion 14 extends outward from the body 13, the third width W3 and the fourth width W4 are both greater than the first width W1. Through the arrangement of the first extending portion 14, and the configuration that the body 13 and the first extending portion 14 are tapered from the head end 11 to the feather end 12, the artificial badminton 1 made of the feather rod 10 of the embodiment can exert the performance close to that of a natural badminton.

In the present embodiment, the overall thickness of the first extension portion 14 is smaller than the overall height of the body 13. Specifically, the first extension 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. Furthermore, the first extending portion 14 has a second thickness T2 at the hair end 12, the second thickness is between 0.1 mm and 0.18 mm, and preferably 0.15 mm.

Preferably, the hair shaft 10 of the present embodiment further includes a second extending portion 15 disposed on the second side 132 of the body 13. Likewise, the second extension 15 is also tapered from the ball end 11 to the blade end 12. Specifically, the second extending portion 15 has a fifth width W5 at the ball end 11 and a sixth width W6 at the blade end 12, and the fifth width W5 is greater than the sixth width W6.

Preferably, the fifth width W5 of the second extending 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 extending portion 14. Also, the sixth width W6 of the second extension 15 at the blade end 12 is substantially equal to the second width W2 of the body 13. In other words, the second extending portion 15 extends outwardly from the left and right sides of the body 13 at the ball end 11, and tapers to the same width (second width W2) as the body 13 at the blade end 12, as shown in fig. 4.

The second extension 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 14. In addition, the second extending portion 15 has a fourth thickness T4 at the blade 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 14.

Fig. 5A is a schematic view of a hair shaft according to a second embodiment of the present invention, fig. 5B is a right side view of the hair shaft shown in fig. 5A, and fig. 5C is a left side view of the hair shaft shown in fig. 5A, please refer to fig. 5A, fig. 5B and fig. 5C. The hair shaft 10a of this embodiment also includes a main body 13a, a first extending portion 14a and a second extending portion 15a, and tapers from the ball end 11a to the blade end 12 a. The difference from the hair shaft 10a of the first embodiment is that the second extension portion 15a is tapered to substantially the same extent as the first extension portion 14 a. Specifically, the second extending portion 15a extends outwardly from the left and right sides of the body 13a at both the ball end 11a and the blade end 12 a. That is, the overall width of the second extending portion 15a is greater than the overall width of the body 13a, i.e., the sixth width W6 of the second extending portion 15a at the hair end 12a is greater than the second width W2 of the body 13a, and the sixth width W6 is substantially equal to the fourth width W4 of the first extending portion 14a, as shown in fig. 5C.

In the present 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 be preferably 0.24 mm. In addition, the first height H1 is preferably 1.32 millimeters; 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 be preferably 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 be between 0.7 mm and 0.71 mm, and the sixth width W6 is substantially equal to the fourth width W4. In the present 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, as for other structural details of the hair shaft 10a, reference can be made to the hair shaft 10 of the first embodiment, which will not be described herein again.

As shown in fig. 2 and fig. 5C, preferably, the first extending

portions

14 and 14a of the first and second embodiments have two first arc-shaped

sidewalls

141 and 141a opposite to each other. That is, the sidewalls of the left and right sides of the

first extension portion

14, 14a are arc-shaped structures having an R angle. Similarly, the second extending

portion

15, 15a has two opposite second arc-shaped

sidewalls

151, 151a, that is, the sidewalls of the second extending

portion

15, 15a have an arc-shaped structure with an R-angle, preferably, the radian of the R-angle may be between 0.27 and 0.28.

Fig. 6 is a schematic view of a hair shaft according to a third embodiment of the present invention, please refer to fig. 6. In this embodiment, the first extending portion 14b and the second extending portion 15b of the hair shaft 10b may also have a planar side wall, i.e., an arc structure without an R-angle, which is not limited by the present invention. In addition, as to other structural details of the hair shaft 10b, reference can be made to the hair shaft 10 of the first embodiment or the hair shaft 10b of the second embodiment, which will not be described herein again.

Fig. 7A is a schematic view of a hair shaft according to a fourth embodiment of the present invention, fig. 7B is a right side view of the hair shaft shown in fig. 7A, and fig. 7C is a left side view of the hair shaft shown in fig. 7A, please refer to fig. 7A, fig. 7B and fig. 7C. In this embodiment, the feather rod 10c may not have the second extending portion, but only the first extending portion 14c, so that the feather end 12c (or the head end 11c) may have a T-shaped structure, and the effect of approaching the performance of a natural badminton may also be achieved. In the present 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 be preferably 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 second height H2 is preferably 0.85 mm. The difference between the first height H1 and the second height H2 may be preferably between 0.71 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 the present 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, as for other structural details of the hair shaft 10c, reference can be made to the hair shaft 10 of the first embodiment, which will not be described herein again.

Fig. 8A is a rigidity test chart of the shaft of the first embodiment of the present invention, the shaft of a natural badminton, and a commercially available artificial badminton, please refer to fig. 8A. The rigidity test is performed by defining a plurality of cut points (herein, test points) prior to the shafts (including the shaft of a natural badminton, the shaft of a commercially available badminton of type a, the shaft 10 of the first embodiment, the shaft 10a of the second embodiment, and the shaft 10c of the fourth embodiment), and measuring the displacement of each cut point after the weight is loaded on both ends of the shaft. After the displacement of each intercept point is connected, the rigidity trend curve of the hair pole can be obtained. As shown in fig. 8A, the

shafts

10 and 10a and 10c of the first, second and fourth embodiments are similar to the rigidity trend curve of the shafts of the natural shuttlecocks. In other words, the rigidity of the

shafts

10, 10a and 10c is close to that of the natural shuttlecock.

Fig. 8B is a weight diagram of the shaft of the natural shuttlecock and the shafts of the commercially available artificial shuttlecocks according to the first embodiment of the present invention, please refer to fig. 8B. The weight of the shaft is also measured by defining a plurality of cut points (herein referred to as cut points) prior to the shaft (including the shaft of a natural shuttlecock, the shaft of a commercially available shuttlecock of the first embodiment, the shaft 10a of the second embodiment, and the shaft 10c of the fourth embodiment), and obtaining shaft segments at different positions after cutting, and weighing the shaft segments at each position to obtain a weight curve graph as shown in fig. 8B, wherein the shaft 10 of the first embodiment, the shaft 10a of the second embodiment, and the shaft 10c of the fourth embodiment are close to the weight curve of the shaft of the natural shuttlecock, in other words, the weights of the

shafts

10, 10a, and 10c of the first embodiment are close to the shaft of the natural shuttlecock.

In summary, according to the utility model discloses an artificial badminton and feather pole thereof, the bulb end of feather pole utensil is connected in the bulb, and the workprint end is connected in the workprint. The bristle bar comprises a body and a first extension part, and the body and the first extension part are gradually reduced from the ball head end to the bristle piece end. The body has a first width and a first height at the ball end, and a second width and a second height at the burr 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. Configuration and size restriction through body and first extension for the whole rigidity and the counter weight of feather pole are close to in the feather pole of natural badminton, and with the utility model discloses an artificial badminton's that feather pole was made performance is closer to in natural badminton.

It should be noted that the above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims of the present invention should not be limited to the above-mentioned embodiments, but defined by the scope of the claims.

Claims

1. An artificial shuttlecock, comprising:

a ball head;

a plurality of wool chips; and

a plurality of hair poles have a bulb end and a hair piece end relative respectively, and this bulb end is connected in this bulb, and this hair piece end is connected in one of them of these hair pieces, and each these hair poles include:

a body having a first side and a second side opposite to each other, the body tapering from the ball end to the blade end, the body having a first width and a first height at the ball end, the body having a second width and a second height at the blade end, a difference between the first width and the second width being 0.1 mm to 0.35 mm, a difference between the first height and the second height being 0.3 mm to 0.75 mm; and

the first extending part is arranged on the first side of the body and gradually shrinks from the ball head end to the hair piece end, the first extending part has a third width at the ball head end and a fourth width at the hair piece end, and the third width and the fourth width are larger than the first width.

2. The artificial shuttlecock as in claim 1 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.

3. The artificial shuttlecock as in claim 1 wherein 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.

4. The artificial shuttlecock as in claim 1 wherein the first extension has a first thickness at the head end between 0.2 mm and 0.3 mm and a second thickness at the blade end between 0.1 mm and 0.18 mm.

5. The artificial shuttlecock as in claim 1 wherein the first extension has two first arcuate side walls opposite each other.

6. The artificial shuttlecock as in claim 1 wherein the shaft further comprises a second extension portion disposed on the second side of the body and tapering from the head end to the blade end, the second extension portion having a fifth width at the head end and a sixth width at the blade end, the fifth width being greater than the first width, the sixth width being greater than or equal to the second width.

7. The artificial shuttlecock as in claim 6 wherein the fifth width is equal to the third width and the sixth width is equal to the fourth width.

8. The artificial shuttlecock as in claim 6 wherein the fifth width is equal to the third width and the sixth width is equal to the second width.

9. The artificial shuttlecock as in claim 6 wherein the second extension has two second opposing curved side walls.

10. The artificial shuttlecock as in claim 6 wherein the second extension has a third thickness at the head end between 0.2 mm and 0.3 mm and a fourth thickness at the blade end between 0.1 mm and 0.18 mm.

11. The utility model provides a feather pole, is applied to an artificial badminton, and this artificial badminton includes a bulb, a plurality of workprint and a plurality of this feather pole, and these some feather poles have a relative bulb end and a workprint end respectively, and this bulb end is connected in this bulb, and this workprint end is connected in one of them of these some workprints, and its characterized in that, each these some feather poles include:

12. The hair shaft of claim 11, 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.

13. The hair shaft of claim 11, wherein 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.

14. The hair shaft of claim 11, wherein said first extension portion has a first thickness at said ball end, said first thickness being between 0.2 mm and 0.3 mm, and a second thickness at said blade end, said second thickness being between 0.1 mm and 0.18 mm.

15. The hair shaft of claim 11, wherein said first extension has two first arcuate sidewalls opposite each other.

16. The hair shaft of claim 11, further comprising a second extension portion disposed on the second side of the body and tapering from the ball end to the blade end, the second extension portion having a fifth width at the ball end and a sixth width at the blade end, the fifth width being greater than the first width, the sixth width being greater than or equal to the second width.

17. The hair shaft of claim 16, wherein said fifth width is equal to said third width and said sixth width is equal to said fourth width.

18. The hair shaft of claim 16, wherein said fifth width is equal to said third width and said sixth width is equal to said second width.

19. The hair shaft of claim 16, wherein said second extension has two second arcuate sidewalls opposite each other.

20. The hair shaft of claim 16, wherein said second extension portion has a third thickness at said ball end, said third thickness being between 0.2 mm and 0.3 mm, and a fourth thickness at said blade end, said fourth thickness being between 0.1 mm and 0.18 mm.