Brassiere, method for enhancing bust size, and method for forming larger bust

The brassiere design supports the bust from below without bra cups and uses a pressure member to reduce lymphatic and blood flow, effectively increasing bust size through lymphedema-induced swelling and fat formation.

WO2026034526A1PCT designated stage Publication Date: 2026-02-12YAMAKAWA KENSUKE
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Patent Information

Application Number
PCT/JP2025/027839
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-08-07
Filing Date
2025-08-06
Publication Date
2026-02-12

AI Technical Summary

Technical Problem

Existing brassieres for breast augmentation do not effectively increase bust size and fail to promote natural bust growth.

Method used

A brassiere design that supports the bust from below without bra cups, incorporating a pressure member that applies a downward force, reducing lymphatic and blood flow to induce lymphedema, leading to chronic swelling and subcutaneous fat formation for bust enlargement.

Benefits of technology

Significant bust enlargement of up to 1.31 cm in 62 days by impairing lymphatic and blood flow, resulting in chronic lymphedema and subcutaneous fat development.

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided is a brassiere which comprises a support part supporting the bust from below, but in which no bra cup is provided above the support part.
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Description

Bras, how to increase bust size, how to make bust bigger

[0001] The present invention relates to a bra, a method for increasing bust size, and a method for creating larger busts.

[0002] Brassieres for breast augmentation have been proposed (for example, Patent Document 1).

[0003] JP 2010-043399 A

[0004] The object of the present invention is to increase the bust size.

[0005] [1] According to one aspect of the present invention, there is provided a brassiere that has a support section that supports the bust from below, but does not have bra cups above the support section.

[0006] [2] The brassiere described in [1] may further include a pressure member provided above the support portion, which contacts the upper part of the bust and applies a downward force to the bust.

[0007] [3] In the brassiere described in [2], the pressing member may be integrated with the support part.

[0008] [4] In the brassiere described in [2], the pressing member may be a separate member from the support portion.

[0009] [5] In the brassiere according to any one of [2] to [4], the pressing member may be stretchable.

[0010] [6] In the brassiere described in any one of [2] to [5], the pressure members may include a left pressure member that applies a downward force to the left bust, a right pressure member that applies a downward force to the right bust, and a detachable member that detaches the left pressure member and the right pressure member.

[0011] [7] According to one aspect of the present invention, a brassiere (excluding those having bra cups) is provided.

[0012] [8] The brassiere according to any one of [1] to [7] may have a bust growth promoting effect.

[0013] [9] In the brassiere according to any one of [1] to [8], the support of the support parts may cause poor lymphatic and blood flow in the bust, causing the bust to swell and become larger.

[0014]

[10] According to one aspect of the present invention, there is provided a method for enlarging the bust by wearing the brassiere described in any one of [1] to [9].

[0015]

[11] According to one aspect of the present invention, there is provided a method for enlarging the bust by wearing the brassiere according to any one of [1] to [9].

[0016]

[12] According to one aspect of the present invention, there is provided a method for creating a larger bust by wearing the brassiere described in any one of [1] to [9].

[0017]

[13] According to one aspect of the present invention, there is provided a method for creating a larger bust by wearing the brassiere described in any one of [1] to [9].

[0018] [14A] A brassiere for enlarging the bust that is worn without any other clothing, comprising a support part that supports the bust from below, but no bra cups above the support part, wherein the support part comes into contact with the lower part of the bust without any other clothing, thereby supporting the bust solely through the support part and reducing the flow of lymph and blood to the bust, thereby enlarging the bust. [14B] A brassiere for enlarging the bust that is worn without any other clothing, comprising a support part that supports the bust from below, but no bra cups above the support part, wherein the support part comes into contact with the lower part of the bust without any other clothing, thereby supporting the bust solely through the support part and reducing the flow of lymph and blood to the bust, thereby developing and enlarging the bust.

[0019]

[15] The brassiere described in [14A] or [14B] is provided with a pressure member that is provided above the support part and applies a downward force to the bust, and while the bust is supported only by the support part, the pressure member comes into contact with the upper part of the bust without interposing any other clothing on it, applying a downward force to the bust, thereby impairing the flow of lymph and blood in the bust.

[0020]

[16] The brassiere according to [14A], [14B] or

[15] , wherein the support portion includes a wire.

[0021]

[17] The bra of [14A], [14B],

[15] or

[16] , which increases bust size (difference between top and bottom) by 0.94 cm or more when worn for 34 days.

[18] The bra of [14A], [14B],

[15] or

[16] , which increases bust size (difference between top and bottom) by 1.12 cm or more when worn for 48 days.

[19] The bra of [14A], [14B],

[15] or

[16] , which increases bust size (difference between top and bottom) by 1.31 cm or more when worn for 62 days.

[0022]

[20] A brassiere according to any one of [14A], [14B] and

[15] to

[19] (excluding those whose bust size (the difference between the top and bottom) does not increase by 0.94 cm or more even after wearing for 34 days).

[0023]

[21] A brassiere according to any one of [14A], [14B] and

[15] to

[20] , which is to be worn for 34 days or more in order to enlarge the bust.

[0024] [22A] A method for enlarging the bust by wearing a brassiere with a support part that supports the bust from below but does not have bra cups above the support part for 34 days without wearing any other clothing. [22B] A method for developing and enlarging the bust by wearing a brassiere with a support part that supports the bust from below but does not have bra cups above the support part for 34 days without wearing any other clothing.

[0025]

[23] The method according to [22A] or [22B], wherein the bust size (difference between top and bottom) is increased by 0.94 cm or more by wearing the brassiere for 34 days.

[24] The method according to [22A] or [22B], wherein the bust size (difference between top and bottom) is increased by 1.12 cm or more by wearing the brassiere for 48 days.

[25] The method according to [22A] or [22B], wherein the bust size (difference between top and bottom) is increased by 1.31 cm or more by wearing the brassiere for 62 days.

[0026] [26A] A method according to any one of [22A], [22B] and

[23] to

[25] for enlarging the bust by reducing the flow of lymph and blood in the bust. [26B] A method according to any one of [22A], [22B] and

[23] to

[25] for developing and enlarging the bust by reducing the flow of lymph and blood in the bust.

[0027] [27A] A method for making larger breasts by wearing a brassiere with a support part that supports the bust from below but no bra cups above the support part for 34 days without wearing any other clothing. [27B] A method for developing and making larger breasts by wearing a brassiere with a support part that supports the bust from below but no bra cups above the support part for 34 days without wearing any other clothing.

[0028]

[28] The method according to [27A] or [27B], wherein by wearing the bra for 34 days, a bust size (difference between the top and bottom) is increased by 0.94 cm or more compared to before using the bra.

[29] The method according to [27A] or [27B], wherein by wearing the bra for 48 days, a bust size (difference between the top and bottom) is increased by 1.12 cm or more compared to before using the bra.

[0029]

[30] The method according to [27A] or [27B], wherein by wearing the brassiere for 62 days, the bust size (difference between the top and bottom) is made 1.31 cm or more larger than before using the brassiere.

[0030] [31A] A method according to any one of [27A], [27B] and

[28] to

[30] for making larger breasts by reducing lymphatic and blood flow in the breasts. [31A] A method according to any one of [27A], [27B] and

[28] to

[30] for making larger breasts by developing them by reducing lymphatic and blood flow in the breasts.

[0031] It can make your bust bigger.

[0032] Schematic diagram of a brassiere 100 according to a first embodiment. A cross-sectional view schematically showing the state in which the brassiere 100 is worn. A schematic diagram of a brassiere 101 according to a second embodiment. A schematic diagram of a brassiere 101 according to a second embodiment. A cross-sectional view schematically showing the state in which the brassiere 101 is worn. A diagram showing the bust growth promoting effect.

[0033] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0034] FIG. 1 is a schematic diagram of a brassiere 100 according to a first embodiment. This brassiere 100 is equipped with an underwire 1. The underwire 1 contacts the lower part of the bust and supports the bust from below. The underwire 1 may be, for example, a metal or plastic core covered with cloth, and may have an elongated shape. Note that as long as the brassiere 100 has a support part (one example of which is the underwire 1) that supports the bust from below, there are no restrictions on the specific shape or material of the support part.

[0035] However, while a typical brassiere has bra cups that are located above the wire section 1 and that encase and support the bust, this embodiment does not have such bra cups. This is one of the features of this embodiment, and it allows the brassiere 100 to have the effect of promoting bust growth.

[0036] In addition to the bra cups, the bra 100 may also include components that are included in a regular bra, such as side belts, hooks, straps, etc. It can be said that the bra 100 according to this embodiment is a regular bra without the bra cups.

[0037] FIG. 2 is a cross-sectional view showing a schematic view of the brassiere 100 being worn. This brassiere 100 is primarily intended to be worn without any other clothing. Because the brassiere 100 does not have bra cups, the bust is supported by the wire 1. That is, while gravity exerts a downward force on the bust, the wire 1 supports the bust upward. This generates a shear force between the wire 1 and the bust (the portion distal to the wire 1). This reduces lymphatic and blood flow in the portion of the bust supported by the wire 1 (the portion in contact with the wire 1), causing swelling (the formation of edema), which leads to bust enlargement. That is, reducing lymphatic and blood flow in the portion of the bust supported by the wire 1 (the portion in contact with the wire 1), causing edema (excluding temporary swelling (which then returns to normal)) in the bust, resulting in bust growth and enlargement. More specifically, poor lymphatic and blood flow occurs in the areas of the bust supported by the wire section 1 (areas in contact with the wire section 1), causing lymphedema, a type of swelling caused by poor lymphatic flow. When lymphedema becomes chronic, a large amount of subcutaneous fat is formed, resulting in the development and enlargement of the bust. Specifically, for example, by supporting the bust from below solely with the support section (wire section 1) of the brassiere 100, poor lymphatic and blood flow occurs in the bust. Wearing the brassiere 100 for 34, 48, or 62 days causes lymphedema, a type of swelling caused by poor lymphatic flow, to develop in the bust. When lymphedema becomes chronic, a large amount of subcutaneous fat is formed, resulting in the development and enlargement of the bust. The thinner the wire section 1, the greater this effect.

[0038] It was common general technical knowledge prior to the filing date of this application that lymphedema is edema that occurs when lymphatic flow is impaired, that lymphedema is localized edema in which high-protein body fluid accumulates in tissue spaces, that when lymphedema becomes chronic, a large amount of subcutaneous fat is formed, that lymphedema is completely different from ordinary systemic edema (simple water retention), that in ordinary systemic edema, water moves from blood vessels into tissue spaces and accumulates there, but protein does not accumulate, that systemic edema improves if the underlying disease, such as heart failure, renal failure, hepatic failure, or hypoproteinemia, is treated, and that excessive formation of subcutaneous fat does not occur even if systemic edema is prolonged.

[0039] 3A and 3B are schematic diagrams of a brassiere 101 according to a second embodiment. This brassiere 101 includes the same components as the brassiere 100 in FIG. 1, but also includes a pressure member 2. The pressure member 2 is located above the wire 1 and contacts the upper part of the bust, applying downward force to the bust. The pressure member 2 is preferably stretchable, and may be made of rubber, for example. The pressure member 2 may also be a balloon that can be inflated with air, or an electrode for passing a weak current.

[0040] As a specific configuration example of the pressing member 2, the pressing member 2 has a left pressing member 21, a right pressing member 22, and a detachable member 23.

[0041] The left pressing member 21 applies a downward force to the left bust, and the right pressing member 22 applies a downward force to the right bust.

[0042] The detachable members 23 are provided, for example, in the end regions of the left pressing member 21 and the right pressing member 22, and allow the left pressing member 21 and the right pressing member 22 to be attached and detached. The detachable members 23 are, for example, hooks ( FIG. 3A shows the state in which the hooks are unfastened, and FIG. 3B shows the state in which the hooks are fastened). It is desirable to provide multiple hooks so that the lengths of the left pressing member 21 and the right pressing member 22 can be adjusted. Alternatively, the detachable members 23 may be hook-and-loop fasteners (for example, Magic Tape (registered trademark) or Velcro (registered trademark)) instead of hooks.

[0043] As shown in the figure, the pressing member 2 may be integrated with the wire portion 1. Here, "integrated" includes not only a mode in which the pressing member 2 and the wire portion 1 are directly attached to each other, but also a mode in which they are attached via another member. As a specific example, one end of the left pressing member 21 is attached to the left side of the wire portion 1. One end of the left pressing member 21 can also be said to be configured to extend from the left side of the wire portion 1. The same applies to the right pressing member 22.

[0044] The pressing member 2 may be a separate member from the wire portion 1. In this case, the pressing member 2 may be configured to be wrapped around the chest. Furthermore, the pressing member 2 may be detachable from the wire portion 1.

[0045] 4 is a cross-sectional view showing a state in which the brassiere 101 is worn. When the brassiere 101 is worn, a downward force is applied to the bust not only by gravity but also by the pressing member 2. This increases the effect of making the bust larger.

[0046] By wearing (having a woman wear) the brassieres 100 and 101 described above, the bust can be enlarged and a larger bust can be created.

[0047] 5 is a diagram showing the bust growth promoting effect of wearing brassieres 100 and 101. The following test was conducted on five subjects.

[0048] First, before putting on the brassieres 100 and 101, the bust size (the difference between the top and the underbust; the same applies below) was measured and used as a reference size.

[0049] The subjects were then asked to go 28 to 34 days (approximately 4 weeks) without wearing the brassieres 100 and 101, and changes in bust size from the reference size were measured. The measurements were conducted under conditions of no weight loss and no weight gain of 1 kg or more. The results are shown in the bar graph in Figure 5(a). The values ​​above the bar graph indicate the average value ± standard deviation (same below).

[0050] The subjects were then asked to wear the brassiere 100 for 28 to 34 days (approximately 4 weeks, excluding sleep time), and changes in bust size from the reference size were measured. The results are shown in the bar graph of Figure 5(b).

[0051] A paired t-test was conducted using these average values ​​and standard deviations to examine the bust growth promoting effect of brassiere 101. As a result, it was found that there was a significant difference in the change in bust size between the two groups, with a p-value of less than 0.001. Therefore, it was shown that wearing brassiere 100 for at least 34 days significantly increased bust growth by an average of 1.22 cm (even when standard deviation is taken into account, it is at least 1.22 - 0.28 = 0.94 cm). It is estimated that wearing brassiere 101 will result in greater bust growth.

[0052] The same five subjects were then asked to wear regular bras, and after six months, the change in bust size from the baseline size was measured. Their weight did not decrease from the baseline measurement, and the increase was limited to less than 1 kg. The results are shown in the bar graph in Figure 5(c). No significant changes were observed in either group, with a p value greater than 0.05. It can be assumed that bust size was maintained for at least six months.

[0053] The same five subjects were then asked to wear the brassiere 101 for 14 days (excluding sleep time), and changes in bust size from the baseline size were measured. The results are shown in the bar graph in Figure 5(d). No significant changes were observed in either group, with p values ​​greater than 0.05.

[0054] The same five subjects then wore the brassiere 101 for an additional 14 days (excluding sleep time), and changes in bust size from the baseline size were measured. Furthermore, weight did not decrease from the baseline measurement, and the increase was limited to less than 1 kg. The results are shown in the bar graph of Figure 5(e). A p-value of less than 0.001 indicated that there was a significant difference in bust size between the two groups. From the above, it was demonstrated that wearing the brassiere 101 for at least 28 days significantly increased bust size by an average of 1.60 - 1.20 = 0.4 cm.

[0055] 5(b) and 5(d) together, wearing bras 100, 101 for 42 to 48 days (specifically, wearing bras 100 for 28 to 34 days, followed by wearing bra 101 for 14 days) resulted in significant bust growth of an average of 1.36 cm (even when standard deviation is taken into account, it is at least 1.36 - 0.24 = 1.12 cm). Furthermore, wearing bra 100 for 42 to 48 days also results in the formation of lymphedema, which is swelling caused by poor lymphatic flow, in the bust through the same mechanism as when bras 100, 101 are worn for 42 to 48 days, and since lymphedema causes a large amount of subcutaneous fat to form when it becomes chronic, it is estimated that significant bust growth occurs. 5(b), (d), and (e) together, wearing bras 100 and 101 for 56 to 62 days (specifically, wearing bras 100 for 28 to 34 days, followed by wearing bra 101 for 28 days) results in significant bust growth of 1.60 cm on average (at least 1.60-0.29=1.31 cm even when standard deviation is taken into account). Furthermore, wearing bra 100 for 56 to 62 days also induces lymphedema, a type of edema caused by poor lymphatic flow, in the bust through the same mechanism as when bras 100 and 101 are worn for 56 to 62 days. Because chronic lymphedema leads to the formation of a large amount of subcutaneous fat, it is estimated that significant bust growth results.

[0056] It should be noted that the present invention does not include brassieres that have a support part that supports the bust from below, but do not have bra cups above the support part (whether or not they have a pressing member above the support part that applies a downward force to the bust is optional), but that do not have the purpose, function and / or effect of enlarging the bust.

[0057] Based on the above description, a person skilled in the art may be able to conceive additional effects and various modifications of the present invention, but the aspects of the present invention are not limited to the individual embodiments described above. Various additions, modifications, and partial deletions are possible within the scope of the conceptual idea and spirit of the present invention, which is derived from the content defined in the claims and their equivalents.

[0058] For example, what is described herein as a single component (including what is depicted as a single component in the drawings) may be realized by multiple components, and conversely, what is described herein as multiple components (including what is depicted as multiple components in the drawings) may be realized by a single component.

[0059] Furthermore, not all of the features described in this specification are essential requirements. In particular, features described in this specification but not included in the claims can be considered optional additional features.

[0060] It should be noted that the applicant is merely aware of the inventions disclosed in the documents listed in the "Prior Art Documents" section of this specification, and the present invention does not necessarily aim to solve the problems of the disclosed inventions. The problem that the present invention aims to solve should be determined by taking into consideration the entire specification. For example, if this specification states that a specific configuration achieves a certain effect, it can also be said that the present invention solves a problem that is the reverse of that effect. However, it is not necessarily intended that such a specific configuration be an essential requirement.

[0061] 100, 101 brassiere 1 wire part 2 pressing member 21 left pressing member 22 right pressing member 23 detachable member

Claims

1. A bra for enlarging the bust that is worn without other clothing, and has a support part that supports the bust from below, but no bra cups are provided above the support part. The support part comes into contact with the lower part of the bust without other clothing, so that the bust is supported only by the support part, and the flow of lymph and blood in the bust is reduced, thereby developing and enlarging the bust.

2. The brassiere of claim 1, further comprising a pressure member disposed above the support section that applies a downward force to the bust, and wherein the support section alone supports the bust, while the pressure member contacts the upper part of the bust without the intervention of other clothing, applying a downward force to the bust and impairing lymphatic and blood flow to the bust.

3. The brassiere according to claim 1 or 2, wherein the support portion includes a wire.

4. The brassiere according to claim 1 or 2, which increases bust size (difference between top and underbust) by 0.94 cm or more when worn for 34 days.

5. The brassiere according to claim 1 or 2, which increases bust size (difference between top and underbust) by 1.12 cm or more when worn for 48 days.

6. The brassiere according to claim 1 or 2, which increases bust size (difference between top and underbust) by 1.31 cm or more when worn for 62 days.

7. The brassiere according to claim 1 or 2 (excluding those in which the bust size (difference between the top and bottom) does not increase by 0.94 cm or more even after wearing for 34 days).

8. The brassiere of claim 1 or 2, which is to be worn for 34 days or more to enlarge the bust.

9. A method for developing and enlarging the bust by wearing a brassiere that has a support part that supports the bust from below but does not have bra cups above the support part for 34 days without any other clothing.

10. The method according to claim 9, wherein the bust size (difference between the top and bottom) increases by 0.94 cm or more by wearing the brassiere for 34 days.

11. The method according to claim 9, wherein wearing the brassiere for 48 days increases bust size (difference between top and bottom) by 1.12 cm or more.

12. The method according to claim 9, wherein the bust size (difference between the top and bottom) increases by 1.31 cm or more by wearing the brassiere for 62 days.

13. A method according to any one of claims 9 to 12, which reduces lymphatic and blood flow to the bust, thereby developing and enlarging the bust.

14. A method for developing and enlarging the bust by wearing a brassiere with a support part that supports the bust from below but does not have bra cups above the support part for 34 days without any other clothing.

15. The method according to claim 14, wherein wearing the bra for 34 days produces a bust size (difference between the top and bottom) that is 0.94 cm or more larger than before using the bra.

16. The method according to claim 14, wherein wearing the bra for 48 days results in a bust size (difference between the top and bottom) that is 1.12 cm or more larger than before using the bra.

17. The method according to claim 14, wherein wearing the bra for 62 days produces a bust size (difference between the top and bottom) that is 1.31 cm or more larger than before using the bra.

18. A method according to any one of claims 14 to 17, which reduces lymphatic and blood flow in the bust, thereby developing and enlarging the bust.

Citation Information

Patent Citations

  • JP1975018431U