A bra

Abstract

The present application discloses a bra. The bra comprises a cup part covering the left and right breasts of a wearer, a pair of shoulder strap parts connected to the upper part of the cup part, a pair of wing parts arranged on the left and right of the cup part, a bottom band connected to the lower part of the cup part, and a buffer part arranged between the cup and the bottom band. The width d1 of the buffer part and the width d2 of the bottom band satisfy the following relationship: 0.05 < d1 / d2 ≤ 0.50, wherein d1 is the distance from the tangent line parallel to the bottom band and tangent to the cup to the bottom band. The bra of the present application is suitable for wearing during sports and daily wearing. When worn daily, there is no pressure on the lungs, and the comfort is good; when worn during sports, the shaking of the chest can be effectively inhibited, and the chest is protected.

Description

TECHNICAL FIELD

[0001] The present application discloses a bra which can reduce vibration during exercise and can be comfortably worn in daily life. BACKGROUND

[0002] With the development of society, the concept of keeping healthy by exercise is gradually accepted by people. More and more people participate in exercise, and people have higher and higher requirements for the comfort and functionality of the clothes worn during exercise. When women perform actions such as running or jumping, the situation of large amplitude shaking of the chest is relatively common even if they wear a bra. In addition to the discomfort, sometimes the serious problem of breast sagging caused by rupture of the ligament on the breast will occur. At present, in order to solve the problem of chest vibration during exercise, the bra is mostly relied on to tighten and bind the body to achieve the purpose, but the problem is that the lungs are in a state of being pressed for a long time, and the unsmooth breathing becomes a great trouble.

[0003] Therefore, some people propose to set an insert on the sports bra to reduce the feeling of oppression and improve the comfort of wearing. For example, Japanese patent document JP6472921B discloses a bra with excellent vibration resistance. By setting an insert on the upper and lower parts of the cup, the insert is used to disperse the force generated by shaking, and the sliding out and up-and-down shaking of the chest are inhibited. However, the setting of the insert on the upper part of the cup is not conducive to perspiration after exercise, and the stretchability of the insert is low, which will still cause a certain feeling of oppression to the chest. In addition, some people will change into a sports bra during exercise for comfort, and then change into a normal bra after exercise, which is very inconvenient. SUMMARY

[0004] The purpose of the present application is to provide a bra that can balance daily wear and exercise shock absorption, has no feeling of oppression, and does not affect the perspiration during exercise.

[0005] The technical solution of the present application is as follows:

[0006] (1) The bra of the present application comprises a cup part covering the left and right breasts of the wearer, a pair of left and right shoulder straps connected to the upper part of the cup part, a pair of left and right wing parts arranged on the left and right sides of the cup part, a bottom strap connected to the lower part of the cup part, and a buffer part arranged between the cup and the bottom strap. The width d1 of the buffer part and the width d2 of the bottom strap satisfy the following relationship: 0.05 < d1 / d2 ≤ 0.50, wherein d1 is the distance from the tangent line parallel to the bottom strap and tangent to the cup to the bottom strap.

[0007] (2) The bra of the above (1) is composed of two different materials, which is divided into front and back parts; the elongation rate of the front part of the shoulder strap is 10% or less, and the elongation recovery rate is 90% or more.

[0008] (3) The bra of the above (2), the elongation of the front part is S1, the elongation of the back part is S2, and the following relationship is satisfied: 0.10≤S1 / S2<1.00.

[0009] (4) The bra of the above (1) or (2), the front part of the unilateral shoulder strap is single.

[0010] (5) The bra of the above (2), the front part of the unilateral shoulder strap is double, which is respectively the outside shoulder strap and the inside shoulder strap; the extension line of the outside shoulder strap and the extension line of the inside shoulder strap form an acute angle triangle with the bra bottom strap, the included angle formed by the outside shoulder strap and the inside shoulder strap is the top angle; the bottom side ℓ corresponding to the top angle and the height h on the bottom side ℓ satisfy the following relationship: 0.10≤ℓ / h≤0.60.

[0011] (6) The bra of the above (5), the inside shoulder strap includes the left shoulder inside shoulder strap and the right shoulder inside shoulder strap, and the included angle between the extension line of the left shoulder inside shoulder strap and the extension line of the right shoulder inside shoulder strap is 10°-40°.

[0012] (7) The bra of the above (1) or (2), the tail end of the shoulder strap is separated from the bra, and the back part of the shoulder strap can be freely adjusted to be parallel or crossed.

[0013] (8) The bra of the above (1), the friction coefficient of the bottom strap is 0.90-1.00.

[0014] (9) The bra of the above (1), the height h1 of the wing part glue bone and the height h2 of the cup satisfy the following relationship: h1 / h2≥0.60.

[0015] The bra of the present application can obtain the effect of suppressing the chest shaking during the movement without any compression feeling during wearing, without setting the inlay sheet and the like, and without affecting the perspiration after the movement, by adjusting the width ratio between the buffer part and the bottom strap, and is suitable for any occasion such as daily life, work and movement. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the front view of the bra of the present application, in which d1 is the width of the buffer part, and d2 is the width of the bottom strap.

[0017] Figure 2 It is the position view of the bottom and the height of the triangle formed by the inside and outside shoulder straps and the bottom strap, in which ℓ is the bottom side corresponding to the top angle formed by the included angle of the outside shoulder strap and the inside shoulder strap, and h is the height on the bottom side ℓ.

[0018] Figure 3 It is the design view of the high wing part, in which h1 is the height of the wing part glue bone, and h2 is the height of the cup. DETAILED DESCRIPTION

[0019] The bra of the present application comprises a cup part covering the left and right breasts of the wearer, a pair of left and right shoulder straps connected to the upper part of the cup part, a pair of left and right wing parts provided on the left and right of the cup part, a bottom band connected to the lower part of the cup part, and a buffer part provided between the cup and the bottom band. The relationship between the width d1 of the buffer part and the width d2 of the bottom band is very important for shock absorption. If d1 / d2 is greater than 0.50, the width of the buffer part is relatively large relative to the width of the bottom band, and in order to avoid breast movement, the bottom band and the buffer part need to provide greater support force, which will cause compression and discomfort. If d1 / d2 is less than 0.05, it is equivalent to not providing a buffer part, and the bottom band is integrally connected with the cup, and the friction coefficient on the inner side of the cup part is relatively low, and the bottom band is easily displaced and slides under the influence of the inner side of the cup part. In the present application, d1 / d2 satisfies the following relationship: 0.05 < d1 / d2 ≤ 0.50, wherein d1 is the distance from the tangent to the bottom band to the tangent to the cup.

[0020] The bra of the present application comprises a cup part covering the left and right breasts of the wearer, a pair of left and right shoulder straps connected to the upper part of the cup part, a pair of left and right wing parts provided on the left and right of the cup part, a bottom band connected to the lower part of the cup part, and a buffer part provided between the cup and the bottom band. The relationship between the width d1 of the buffer part and the width d2 of the bottom band is very important for shock absorption. If d1 / d2 is greater than 0.50, the width of the buffer part is relatively large relative to the width of the bottom band, and in order to avoid breast movement, the bottom band and the buffer part need to provide greater support force, which will cause compression and discomfort. If d1 / d2 is less than 0.05, it is equivalent to not providing a buffer part, and the bottom band is integrally connected with the cup, and the friction coefficient on the inner side of the cup part is relatively low, and the bottom band is easily displaced and slides under the influence of the inner side of the cup part. In the present application, d1 / d2 satisfies the following relationship: 0.05 < d1 / d2 ≤ 0.50, wherein d1 is the distance from the tangent to the bottom band to the tangent to the cup part.

[0021] The bra of the present application comprises a cup part covering the left and right breasts of the wearer, a pair of left and right shoulder straps connected to the upper part of the cup part, a pair of left and right wing parts provided on the left and right of the cup part, a bottom band connected to the lower part of the cup part, and a buffer part provided between the cup and the bottom band. The relationship between the width d1 of the buffer part and the width d2 of the bottom band is very important for shock absorption. If d1 / d2 is greater than 0.50, the width of the buffer part is relatively large relative to the width of the bottom band, and in order to avoid breast movement, the bottom band and the buffer part need to provide greater support force, which will cause compression and discomfort. If d1 / d2 is less than 0.05, it is equivalent to not providing a buffer part, and the bottom band is integrally connected with the cup, and the friction coefficient on the inner side of the cup part is relatively low, and the bottom band is easily displaced and slides under the influence of the inner side of the cup part. In the present application, d1 / d2 satisfies the following relationship: 0.05 < d1 / d2 ≤ 0.50, wherein d1 is the distance from the tangent to the bottom band to the tangent to the cup part.

[0022] The bra of the present application, the front of the single shoulder strap is single, or the front of the single shoulder strap is double. When the front of the single shoulder strap is double, it is respectively the outside shoulder strap and the inside shoulder strap, the extension line of the outside shoulder strap, the extension line of the inside shoulder strap and the bra bottom strap form an acute angle triangle, wherein the included angle formed by the outside shoulder strap and the inside shoulder strap is the top angle. The relationship between the bottom side ℓ corresponding to the top angle and the height h on the bottom side ℓ is also important for the protection of the breast and the inhibition of the vibration of the breast. If ℓ / h is greater than 0.60, that is, the angle of the two shoulder straps on the single shoulder is too large, the bra cannot provide good protection for the breast during the process of the upper breast moving up and down in the body position, and the problem of the rupture of the upper breast ligament may occur, and the wearing comfort has a downward trend. If ℓ / h is less than 0.10, that is, the angle of the two shoulder straps on the single shoulder is too small, it may be difficult to inhibit the shaking of the breast in the left and right directions during the movement. In the present application, as preferred, ℓ and h satisfy the following relationship: 0.10≤ℓ / h≤0.60.

[0023] The bra of the present application, the inside shoulder strap includes the left shoulder inside shoulder strap and the right shoulder inside shoulder strap. If the included angle between the extension lines of the two inside shoulder straps is greater than 40°, the distance between the left and right shoulder straps is too large, the upper breast is basically not subjected to the force in the direction of the inside of the body when the shoulder strap is stretched, and the problem of breast shaking may occur. If the included angle of the extension lines of the two inside shoulder straps is less than 10°, the distance between the left and right shoulder straps is too small, and in the 8-shaped movement track of the breast, it may be difficult to flexibly adjust the stretching direction of the shoulder strap when the breast center of gravity changes, so that the shaking amplitude of the breast center of gravity on the left and right sides is large. In the present application, as preferred, the included angle between the extension line of the left shoulder inside shoulder strap and the extension line of the right shoulder inside shoulder strap is set to 10°-40°.

[0024] In the present application, as preferred, the tail end of the shoulder strap is separated from the bra, and the rear part of the shoulder strap can be freely adjusted to be parallel or crossed. When the rear part of the shoulder strap is adjusted to be crossed, the freedom of the bra is reduced, and the bra is not easy to shake, which is suitable for wearing during exercise; when the rear part of the shoulder strap is adjusted to be parallel, the freedom of the bra is increased, and the wearing comfort is better, which is suitable for wearing during normal time.

[0025] Under the same wearing pressure, the bottom strap with high friction coefficient can increase the static friction force between the skin and the bottom strap, so that the bra is not easy to displace during the movement. In the present application, as preferred, the friction coefficient of the bottom strap is 0.90-1.00, more preferably 0.95-1.00.

[0026] In the present application, as a preference, the height h1 of the wing gusset satisfies the following relationship with the height h2 of the cup: h1 / h2≥0.60. When the ratio of the height h1 of the wing gusset to the height h2 of the cup of the brassiere of the present application is equal to or greater than 0.60, the chest and the accessory breast are completely wrapped, the breast shape is beautiful, and when moving, since the accessory breast is wrapped, the inside of the cup is full and the binding force of the cup is improved, and the shaking amplitude is reduced.

[0027] The present application is further described below with reference to examples and comparative examples. Each property in the examples and comparative examples was obtained according to the following method.

[0028] (1) Elongation

[0029] Tested according to JIS L 1096:2010 Elongation D method.

[0030] (2) Elongation recovery rate

[0031] Tested with reference to JIS L 1096:2010 Elongation E method, using a Metz CMT6103 universal testing machine, test conditions: sample size: 15 cm x 2 cm, gage length: 100 mm, speed: 100 mm / min, initial load 1 N, constant load 4.4 N, 5 cycles. The elongation recovery rate after 5 cycles was calculated according to the following formula. 3 sets of data were measured in the same way and the average value was taken as the elongation recovery rate of the present application:

[0032]

[0033] Wherein: Ee: elongation elasticity at constant load (elongation recovery rate) (%)

[0034] L: original length of sample (mm)

[0035] L0: length after applying a constant load (4.4 N) for 1 minute (mm)

[0036] L1: length after removing the load for 3 minutes, applying the initial load (mm).

[0037] (3) Friction coefficient

[0038] Tested according to FZ / T 01054-2012.

[0039] (4) Clothing pressure

[0040] The clothing pressure on the shoulder was tested using an AMI3037-5S clothing pressure measuring device, and by adjusting the length of the back shoulder strap, the clothing pressure on the shoulder was controlled to be 3.3±0.1 kPa.

[0041] (5) Displacement amount

[0042] The test was performed using a VICON optical motion capture system (OMG Inc.). Three subjects with a bust size of 75B were asked to run on a Zebirs gait analysis treadmill in Germany at a speed of 8 km / h, while the VICON was used to collect data on the movement in each direction. The average value in each direction was used as the displacement amount for the present invention:

[0043] A. Reference point:

[0044] IJ - deepest point of the sternal notch, LR - lowest point of the left rib, RR - lowest point of the right rib;

[0045] B. Measurement point:

[0046] BO (nipple), BU (5 cm above BO), BD (5 cm below BO), BL (5 cm left of BO), BR (5 cm right of BO);

[0047] C. Measurement item:

[0048] X-axis - movement in the direction of the subject

[0049] Y-axis - movement in the lateral direction of the subject

[0050] Z-axis - movement in the vertical direction of the subject.

[0051] (6) Actual wearing effect (self-report)

[0052] The subjects with a bust size of 75B wore the bra, with the garment pressure controlled to be within the range of 3.3 ± 0.1 kPa. While running on a Zebirs gait analysis treadmill in Germany at a speed of 8 km / h, the subjects were asked about the actual wearing effect, with a smaller rating indicating a better effect. Three subjects were used, and the average value in each direction was used as the actual wearing rating result for the present invention. The specific inquiry items and ratings are shown below:

[0053] Sway feeling:

[0054] 1. No sway with movement

[0055] 2. Slight sway, almost imperceptible

[0056] 3. Sway, but acceptable

[0057] 4. Sway is obvious

[0058] 5. Sway is obvious and uncomfortable

[0059] Compression feeling:

[0060] 1. No compression feeling

[0061] 2. Slight compression feeling

[0062] 3. Squeezed

[0063] 4. Squeezed a lot

[0064] 5. Squeezed a lot and feels breathless

[0065] Chafing:

[0066] 1. No

[0067] 2. A little

[0068] 3. Yes

[0069] 4. A lot

[0070] 5. Very much

[0071] Comfort

[0072] 1. Comfortable

[0073] 2. Not very comfortable

[0074] 3. Uncomfortable.

[0075] Example 1

[0076] The bra of the present application is formed by a cup part covering the left and right breasts of the wearer, a pair of left and right shoulder straps connected to the upper part of the cup part, a pair of wing parts provided on the left and right of the cup part, a bottom strap part connected to the lower part of the cup part, and a buffer part provided between the cup and the bottom strap. The specific parameters of the bra and the wearing effect are shown in Tables 1 and 2.

[0077] The shoulder strap width is 20 mm, the tail end is designed as a live buckle, and the front and back are formed of different materials, with the elongation of the front part being 9% and the elongation recovery rate being 95%, and the elongation of the back part being 65% and the elongation recovery rate being 92%. The front part of the single-sided shoulder strap is two, including an outer shoulder strap and a front inner shoulder strap. The extension line of the outer shoulder strap and the extension line of the inner shoulder strap form an acute triangle with the bottom strap part of the bra, and the included angle formed by the outer shoulder strap and the inner shoulder strap is the top angle, the bottom side ℓ corresponding to the top angle is 86 mm, and the height h corresponding to the top angle is 320 mm; the above-mentioned inner shoulder strap includes a left inner shoulder strap and a right inner shoulder strap, and the included angle between the extension line of the left inner shoulder strap and the extension line of the right inner shoulder strap is 20°.

[0078] The height h1 of the wing part glue bone is 113 mm, and the cup height h2 is 180 mm.

[0079] The width d1 of the buffer part is 8.0 mm, the width d2 of the bottom strap is 28.0 mm, and the friction coefficient is 0.97.

[0080] The back shoulder strap is designed to cross when worn.

[0081] Example 2

[0082] The elongation of the front part is 10%, and the elongation recovery rate is 93%, and the elongation of the back part is 22.2%. The base corresponding to the top angle is 129 mm, and the height h corresponding to the top angle is 305 mm; the angle between the extension line of the left shoulder inner shoulder strap and the extension line of the right inner shoulder strap is 35°.

[0083] The height h1 of the wing bone is 118 mm, and the cup height h2 is 189 mm.

[0084] The width d1 of the buffer part is 2.4 mm, the width d2 of the bottom strap is 38.0 mm, and the friction coefficient is 0.91.

[0085] The rest is the same as example 1, and the bra of the application is formed. The specific parameters of the bra and the wearing effect are shown in table 1 and table 2.

[0086] Example 3

[0087] The elongation of the front part is 9.5%, and the elongation of the back part is 11.9%. The base corresponding to the top angle is 41.6 mm. The angle between the extension line of the left shoulder inner shoulder strap and the extension line of the right inner shoulder strap is 25°.

[0088] The width d1 of the buffer part is 10.1 mm, and the width d2 of the bottom strap is 21.0 mm.

[0089] The back part of the shoulder strap is parallel when worn.

[0090] The rest is the same as example 1, and the bra of the application is formed. The specific parameters of the bra and the wearing effect are shown in table 1 and table 2.

[0091] Example 4

[0092] The elongation of the front part is 2.5%, and the elongation of the back part is 21%. The front part of the unilateral shoulder strap is one, and the rest is the same as example 1, forming the bra of the application. The specific parameters of the bra and the wearing effect are shown in table 1 and table 2.

[0093] Example 5

[0094] The elongation of the front part is 20%. The rest is the same as example 1, forming the bra of the application. The specific parameters of the bra and the wearing effect are shown in table 1 and table 2.

[0095] Example 6

[0096] The elongation of the front part is 2.5%. The rest is the same as example 1, forming the bra of the application. The specific parameters of the bra and the wearing effect are shown in table 1 and table 2.

[0097] Example 7

[0098] The elongation of the front portion was 65%. The rest was the same as in Example 1, and a bra of the present application was formed. The bra specific parameters and wearing effects are shown in Tables 1 and 2.

[0099] Example 8

[0100] The base corresponding to the vertex angle was 11 mm, and the height corresponding to the vertex angle was 220 mm. The rest was the same as in Example 1, and a bra of the present application was formed. The bra specific parameters and wearing effects are shown in Tables 1 and 2.

[0101] Example 9

[0102] The base corresponding to the vertex angle was 232.5 mm, and the height corresponding to the vertex angle was 310 mm. The rest was the same as in Example 1, and a bra of the present application was formed. The bra specific parameters and wearing effects are shown in Tables 1 and 2.

[0103] Example 10

[0104] The angle between the extension line of the left inner shoulder strap and the extension line of the right inner shoulder strap was 8°. The rest was the same as in Example 1, and a bra of the present application was formed. The bra specific parameters and wearing effects are shown in Tables 1 and 2.

[0105] Example 11

[0106] The angle between the extension line of the left inner shoulder strap and the extension line of the right inner shoulder strap was 43°. The rest was the same as in Example 2, and a bra of the present application was formed. The bra specific parameters and wearing effects are shown in Tables 1 and 2.

[0107] Example 12

[0108] The friction coefficient of the bottom strap was 0.83. The rest was the same as in Example 1, and a bra of the present application was formed. The bra specific parameters and wearing effects are shown in Tables 1 and 2.

[0109] Example 13

[0110] The friction coefficient of the bottom strap was 1.06. The rest was the same as in Example 1, and a bra of the present application was formed. The bra specific parameters and wearing effects are shown in Tables 1 and 2.

[0111] Example 14

[0112] The height hi of the wing glue bone was 103 mm. The rest was the same as in Example 1, and a bra of the present application was formed. The bra specific parameters and wearing effects are shown in Tables 1 and 2.

[0113] Comparative Example 1

[0114] The width d1 of the buffer portion was 0.0 mm, and the width d2 of the bottom strap was 35.0 mm. The rest was the same as in Example 1, and a bra of the present application was formed. The bra specific parameters and wearing effects are shown in Tables 1 and 2.

[0115] Comparative Example 2

[0116] The width d1 of the buffer portion was 15 mm. The rest was the same as in Example 3, and a bra of the present application was formed. The specific parameters of the bra and the wearing effect are shown in Tables 1 and 2.

[0117]

[0118]

[0119] From Tables 1 and 2,

[0120] (1) From Example 1 and Example 4, under the same conditions, the bra with two front straps had a slightly smaller chest displacement than the bra with one front strap, although the self-reported ratings of the subjects were the same.

[0121] (2) From Example 1 and Example 6, under the same conditions, the bra with S1 / S2 (front strap elongation ratio / rear strap elongation ratio) of 0.14 had a smaller chest displacement than the bra with S1 / S2 of 0.04, although the self-reported ratings of the subjects were the same.

[0122] (3) From Example 1 and Example 7, under the same conditions, the bra with S1 / S2 of 0.14 had a smaller chest displacement than the bra with S1 / S2 of 1.00, and the subjects' self-reported ratings of the feeling of jiggling were also smaller.

[0123] (4) From Example 1 and Example 8, under the same conditions, the bra with ℓ / h of 0.27 had a smaller chest displacement than the bra with ℓ / h of 0.05, and the subjects' self-reported ratings of the feeling of jiggling were also smaller.

[0124] (5) From Example 1 and Example 9, under the same conditions, the bra with ℓ / h of 0.27 had a smaller chest displacement than the bra with ℓ / h of 0.75, and the subjects' self-reported ratings of the feeling of jiggling were also smaller.

[0125] (6) From Example 1 and Example 10, under the same conditions, the bra with a strap extension line angle of 20° had a smaller chest displacement than the bra with a strap extension line angle of 8°, and the subjects' self-reported ratings of the feeling of jiggling were also smaller.

[0126] (7) From Example 2 and Example 11, under the same conditions, the bra with the angle between the shoulder strap extension lines of 35° has a smaller chest displacement than the bra with the angle between the shoulder strap extension lines of 43° in actual wearing, and the feeling of shaking in the self-reporting items of the subjects is also smaller than the latter.

[0127] (8) From Example 1 and Example 12, under the same conditions, the bra with the friction coefficient of the bottom band of 0.97 has a smaller chest displacement than the bra with the friction coefficient of the bottom band of 0.83 in actual wearing, and the feeling of shaking in the self-reporting items of the subjects is also smaller than the latter.

[0128] (9) From Example 1 and Example 13, under the same conditions, the bra with the friction coefficient of the bottom band of 0.97 has a smaller chest displacement than the bra with the friction coefficient of the bottom band of 1.06 in actual wearing, and the feeling of shaking in the self-reporting items of the subjects is also smaller than the latter.

[0129] (10) From Example 1 and Example 14, under the same conditions, the bra with h1 / h2 of 0.63 has a smaller chest displacement than the bra with h1 / h2 of 0.57 in actual wearing, and the feeling of shaking in the self-reporting items of the subjects is also smaller than the latter.

[0130] (11) From Comparative Example 1 and Example 1, under the same conditions, the bra with d1 / d2 of 0 has a larger chest displacement than the bra with d1 / d2 of 0.29 in actual wearing, and the feeling of shaking, the feeling of tightness and the feeling of comfort in the self-reporting items of the subjects are all worse than the latter.

[0131] (12) From Comparative Example 2 and Example 3, under the same conditions, the bra with d1 / d2 of 0.54 has a larger chest displacement than the bra with d1 / d2 of 0.48 in actual wearing, and the feeling of shaking, the feeling of tightness and the feeling of comfort in the self-reporting items of the subjects are all worse than the latter.

Claims

1. A bra comprising a cup portion covering the left and right breasts of a wearer, a pair of shoulder straps connected to the upper portions of the cup portions, a pair of wing portions provided on the left and right of the cup portions, a band connected to the lower portions of the cup portions, and a cushioning portion provided between the cup portions and the band, characterized in that: The width d1 of the buffer portion and the width d2 of the bottom band satisfy the following relationship: 0.05 < d1 / d2 ≤ 0.50, Wherein, d1 is the distance from the tangent line parallel to the bottom band and tangent to the cup to the bottom band; The shoulder strap is composed of two different materials and is divided into a front portion and a rear portion; the elongation of the front portion of the shoulder strap is less than or equal to 10%, and the elongation recovery rate is greater than or equal to 90%; the elongation of the front portion S1 and the elongation of the rear portion S2 satisfy the following relationship: 0.10 ≤ S1 / S2 < 1.

00.

2. The bra of claim 1, wherein: The front portion of the single shoulder strap of the bra is a single root.

3. The bra of claim 1, wherein: The front of the single-sided shoulder straps of the bra is two, which are the outer shoulder strap and the inner shoulder strap; the extension line of the outer shoulder strap and the extension line of the inner shoulder strap form an acute angle triangle with the bottom strap of the bra, the included angle formed by the outer shoulder strap and the inner shoulder strap is the top angle, and the bottom corresponding to the top angle is the height h on the bottom , which satisfies the following relationship: 0.10≤ / h≤0.

60.

4. The bra of claim 3, wherein: The inner shoulder strap of the bra includes a left inner shoulder strap and a right inner shoulder strap, and the included angle between the extension line of the left inner shoulder strap and the extension line of the right inner shoulder strap is 10°-40°.

5. The bra of claim 1, wherein: The tail end of the shoulder strap is separated from the bra, and the rear portion of the shoulder strap can be freely adjusted to be parallel or crossed.

6. The bra of claim 1, wherein: The friction coefficient of the bottom band is 0.90-1.

00.

7. The bra of claim 1, wherein: The height h1 of the wing portion glue bone and the height h2 of the cup satisfy the following relationship: h1 / h2 ≥ 0.60.

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