Waist size expansion device and operating method thereof

Abstract

The present invention relates to a waist size expansion device and a method of operating the same. The waist size expansion device according to the present invention is characterized by comprising: at least one pair of expansion members (100) that are positioned in the waist portion of a lower garment and configured to be spaced apart from each other to expand the waist circumference; and an adjustment member (200) that is coupled to the expansion members (100) and configured to adjust the distance between the expansion members (100) according to operation, and to support and fix. In addition, the method of operating the waist size expansion device according to the present invention is characterized by comprising the steps of: placing at least one pair of expansion members (100) in the waist portion of the lower garment (S110); adjusting the distance between the expansion members (100) through an adjustment member (200) and supporting and connecting the expansion members (100) (S120); and, when the user reaches a desired waist circumference, fixing the expansion members (100) to fit the waist circumference (S130).

Description

Technology Field

[0001] The present invention relates to a waist size expansion device and a method of operation thereof, and more specifically, to a device and a method of operation thereof that is positioned at the waistband of trousers, skirts, etc., to expand and adjust the length of the waistline within a certain range. Background Technology

[0003] Generally, ready-made lower garments such as pants and skirts are provided with fixed sizes.

[0004] However, in modern society, there is a growing trend of an obese population characterized by thicker waistlines due to increased waist or abdominal fat resulting from insufficient exercise relative to food intake. Furthermore, for adolescents in their growth phase, waistlines increase along with height as they grow, creating a problem where it becomes difficult to continuously wear existing pants or skirts. Consequently, users face the inconvenience and financial burden of having to purchase new clothing or incur additional costs to have the waistbands of their pants or skirts altered to be enlarged. Therefore, there is an increasing need for technology that can easily adjust the waist size of clothing in response to changes in the wearer's waist circumference.

[0005] In order to resolve the above-mentioned problems, a technology has been disclosed as described in Korean Registered Patent Publication No. 10-2138491 that allows the waist size of lower garments, such as skirts or pants, to be flexibly adjusted according to the wearer's body condition.

[0006] However, conventional technology has limitations such as having many components, making it complex and difficult to use when attached to the waistband of lower garments, and there was a problem where the wearer's comfort was reduced due to the foreign body sensation caused by the size of the adjustment device.

[0007] Therefore, there is a need to develop waist circumference adjustment technology that is simple in structure yet minimizes discomfort for the wearer. Prior art literature

[0009] Korean Registered Patent Publication No. 10-2138491 (Registration Date: July 21, 2020) The problem to be solved

[0010] Accordingly, the present invention has been devised to solve the problems of the prior art as described above, and aims to provide a waist size expansion device and a method of operation thereof that can easily adjust the waist circumference of lower garments with simple operation, prevent problems such as the need for separate repairs or damage to the clothing, and improve the problem of discomfort during wear by enabling waist circumference adjustment without forming a separate attachment structure on the lower garments. means of solving the problem

[0012] The configuration of the present invention for achieving the above objective is,

[0013] At least one pair of extension members (100) positioned at the waist portion of the lower garment and configured to be spaced apart from each other to expand the waist circumference; and

[0014] It is characterized by being composed of a control member (200) that is coupled to the extension member (100) and configured to adjust the distance between the extension members (100) according to operation, and to support and fix.

[0015] The above extension member (100) is formed as a pair arranged to face each other, and the extension member (100) is composed of an extension body (110) and an extension rod (120) arranged in the inner central part of the extension body (110).

[0016] The above adjustment member (200) is characterized by being composed of a rod-shaped adjustment body (210) having opposite screw threads formed on each side along the length direction, and a handle (220) coupled to and positioned in the center of the adjustment body (210).

[0017] The above extension member (100) is formed as a pair arranged to face each other, and the extension member (100) is composed of an extension body (110) and an extension rod (120) arranged in the inner central part of the extension body (110).

[0018] The above adjustment member (200) is characterized by being composed of an adjustment body (210), an adjustment member housing (230) coupled to and positioned in the center of the adjustment body (210), and a handle (220) located on the upper part of the adjustment body (210) and inside the adjustment member housing (230).

[0019] The above adjustment body (210) is formed in the shape of a rod and has opposite screw threads formed on both sides along the length direction with a certain portion in the center, and a pair of driven gears (211) each coupled to both sides of the certain portion in the center.

[0020] The above handle (220) is composed of a handle body (221) formed to be gripped by a user, a handle shaft (222) connected to one side of the handle body (221) and connecting the handle body (221) and the drive gear (223), and a drive gear (223) located at the lower part of the handle shaft (222).

[0021] The above adjustment member housing (230) is formed as a rectangular prism having an internal space and is characterized by having a pair of driven gear position parts (231) formed open at the top, a driving gear position part (232) formed open on both sides, and a plurality of balls (233) arranged along the circumferential direction to smoothly support the rotation of the driven gear (211) inside the pair of driven gear position parts (231).

[0022] The above-mentioned extension body (110) is formed in an arc shape, and

[0023] The extension rod (120) is characterized by being formed in the shape of a hollow rod having a nut (130) formed inside.

[0024] The above extension member (100) is formed in two pairs such that each pair is positioned opposite each other, and the extension member (100) is composed of an extension body (110), an extension rod (120) positioned in the inner central part of the extension body (110), and a pair of nuts (140) coupled to one side of the extension rod (120).

[0025] The above adjustment member (200) is composed of an adjustment body (210) formed in a hollow cylindrical shape, wherein the adjustment body (210) is characterized by having a plurality of through holes (201) on its side.

[0026] The above-mentioned extension body (110) is formed in an arc shape, and

[0027] The extension rod (120) is characterized by being formed in a rod shape having screw threads formed on its outer surface.

[0028] In addition, the method of operating a waist size expansion device according to the present invention comprises the step of placing at least one pair of expansion members (100) in the waist portion of a lower garment (S110);

[0029] A step (S120) of adjusting the spacing between extension members (100) through an adjustment member (200) and supporting and joining the extension members (100); and

[0030] The method is characterized by comprising the step (S130) of fixing the expansion member (100) to the waist circumference when the user reaches the desired waist circumference.

[0031] After the above step (S130), the method is characterized by adding a step (S140) of applying steam to the extension member (100) and the lower garment.

[0032] The steam in the above step (S140) is formed at a temperature of about 80 to 100°C, and the steam application time is formed at about 1 to 3 minutes.

[0033] After the above step (S140), the method is characterized by adding a step (S150) of maintaining the lower garment in an extended state for a certain period of time or cooling it. Effects of the invention

[0035] Therefore, since the length of the waistline of the lower garment can be easily adjusted to fit the wearer's waist circumference with simple operation, there is no need to request separate repairs, which prevents damage to the appearance of the garment, improves ease of use, and eliminates repair costs.

[0036] In addition, since the present invention does not require separate attachment to the lower garment, it does not cause protrusion or pressure on the body when worn, thereby allowing the user to maintain a comfortable fit even while wearing the lower garment.

[0037] Accordingly, the present invention can reduce the problem of being unable to wear the garment due to changes in waist circumference, thereby having the effect of extending the lifespan of the garment.

[0038] In addition, it should be noted that, in addition to the effects specifically stated above, unique effects that can be easily derived and expected from the characteristic configuration of the present invention may also be included in the effects of the present invention. Brief explanation of the drawing

[0040] FIG. 1 is a perspective view of a first embodiment of the waist size expansion device of the present invention. FIG. 2 is an exploded perspective view of a first embodiment of the waist size expansion device of the present invention. FIG. 3 is a diagram illustrating a change in state according to the operation of a first embodiment of the waist size expansion device of the present invention. FIG. 4 is a perspective view of a second embodiment of the waist size expansion device of the present invention. FIG. 5 is an exploded perspective view of a second embodiment of the waist size expansion device of the present invention. FIG. 6 is a diagram illustrating a change in state according to the operation of a second embodiment of the waist size expansion device of the present invention. FIGS. 7 and 8 are drawings showing a third embodiment of the waist size expansion device of the present invention. Specific details for implementing the invention

[0041] Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited by the embodiments described below. These embodiments are provided to more fully explain the present invention to those with average knowledge in the art. Accordingly, the shapes of components in the drawings, etc., are exaggerated to emphasize clearer explanations.

[0042] In the following description, terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention.

[0043] The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0044] FIG. 1 is a perspective view of a first embodiment of the waist size expansion device according to the present invention, FIG. 2 is an exploded perspective view of the first embodiment of the waist size expansion device according to the present invention, FIG. 3 is a drawing showing a change in state according to the operation of the first embodiment of the waist size expansion device according to the present invention, FIG. 4 is a perspective view of a second embodiment of the waist size expansion device according to the present invention, FIG. 5 is an exploded perspective view of the second embodiment of the waist size expansion device according to the present invention, FIG. 6 is a drawing showing a change in state according to the operation of the second embodiment of the waist size expansion device according to the present invention, and FIG. 7 and 8 are drawings showing a third embodiment of the waist size expansion device according to the present invention.

[0046] <1st Example>

[0047] A schematic view of the components of the first embodiment of the waist size expansion device according to the present invention illustrated in FIGS. 1 to 3 shows that it consists of a pair of expansion members (100) positioned in the waist portion of the lower garment and configured to be spaced apart from each other to expand the waist circumference, and an adjustment member (200) coupled to the expansion members (100) and configured to adjust the distance between the expansion members (100) according to operation, and to support and fix.

[0048] The above components are explained in detail as follows.

[0049] The above extension member (100) is formed as a pair arranged to face each other, and the extension member (100) is composed of an extension body (110) and an extension rod (120) arranged in the inner central part of the extension body (110).

[0050] The above extension body (110) can be formed in an arc shape so as to be positioned along the waist circumference of the lower garment.

[0051] The extension rod (120) is in the shape of a hollow rod having a nut (130) formed inside, is formed to protrude toward the inside of the extension body (110), and can be configured to be movable in the longitudinal direction by coupling with the adjustment member (200).

[0052] The nut (130) is fixed inside the extension rod (120) so as to restrict rotation and is screw-coupled with the adjusting member (200), and can be configured so that the extension rod (120) moves in the longitudinal direction according to the rotation of the adjusting member (200).

[0053] The threads of the above nut (130) are formed to correspond to the threads formed on the outer surface of the adjustment body (210) of the adjustment member (200) so as to be coupled with each other.

[0054] In addition, the extension body (110) and the extension rod (120) are formed integrally as in one embodiment of the present invention, but are not limited thereto. A coupling part (not named, not shown) is formed so that the extension rod (120) is coupled to one end of the extension body (110), and the extension rod (120) may also be formed in a form that is fitted and coupled to the coupling part.

[0055] The above adjustment member (200) is composed of an adjustment body (210) and a handle (220) coupled to and positioned in the center of the adjustment body (210).

[0056] The above adjustment body (210) may be formed in the shape of a rod, and screw threads in opposite directions may be formed on both sides along the length direction, and the screw threads may be formed as screw threads in the direction corresponding to each nut (130), so that a pair of extension rods (120) may move in opposite directions according to the rotation of the adjustment member (200) by being screw-coupled with the adjustment member (200).

[0057] The handle (220) can be grasped by the user and function as an operating part for rotating the control body (210).

[0058] In addition, the handle (220) is formed in the shape of a hexagonal prism as an embodiment of the present invention, but is not limited thereto and can be formed in the shape of a polygonal prism such as a triangle, square, or pentagon that is convenient for a user to hold and rotate with their hand.

[0059] Accordingly, the adjustment member (200) can form a lead screw structure to allow a pair of extension rods (120) to move simultaneously in opposite directions by a single rotation operation.

[0060] Next, a method for expanding the waist size of a lower garment according to a first embodiment of the waist size expansion device of the present invention will be described.

[0061] First, a step (S110) of placing an extension member (100) on the waist portion of the lower garment is performed. At this time, one or more pairs of extension members (100) may be positioned facing each other and positioned along the waist circumference direction.

[0062] At this time, an additional step (S115) of fixing the waistband of the lower garment and the extension member (100) with a clip or the like can be performed.

[0063] Subsequently, a step (S120) is performed to adjust the distance between the extension members (100) through the adjustment member (200) and to support and combine the extension members (100). In the above step (S120), the extension rods (120) of the extension members (100) move in opposite directions according to the rotational operation of the adjustment member (200), thereby allowing the waist circumference of the lower garment to be expanded by the outward pressure of the extension body (110).

[0064] Afterward, when the user reaches the desired waist circumference, a step (S130) of fixing the expansion member (100) to fit the waist circumference is performed. In the above step (S130), the rotation operation of the adjustment member (200) may be stopped and the expansion member (100) may be adjusted so that it does not deviate from the position of the waist.

[0065] Afterwards, a step (S140) of applying steam to the extension member (100) may be added.

[0066] The above steam is generally formed at a temperature of about 80 to 100°C, temporarily softens the fiber structure of the lower garment material to assist in expanding the waistline, and maintains the expanded waistline after steam treatment.

[0067] The steam application time can be adjusted to about 1 to 3 minutes, and this step can be appropriately changed depending on the type or thickness of the material of the bottoms.

[0068] The above lower garment may be made of cotton, polyester, wool, nylon, or a mixture of these fibers, and the temperature and time of the steam applied to the expansion member (100) may be adjusted according to the material.

[0069] Specifically, cotton or wool bottoms can be steamed at a temperature of 90–100°C for 1–3 minutes, polyester or nylon bottoms can be steamed at a temperature of 80–90°C for 1–2 minutes, cotton / polyester blends (e.g., 65 / 35) can be steamed at a temperature of 85–95°C for 1–2 minutes, wool / nylon blends (e.g., 70 / 30) can be steamed at a temperature of 90–100°C for 1–3 minutes, and cotton / wool / polyester triple blends (e.g., 50 / 30 / 20) can be steamed at a temperature of 90–100°C for 1–3 minutes.

[0070] Afterwards, if necessary, an additional step (S150) of maintaining the fabric in an expanded state for a certain period of time or cooling can be performed so that the fibers do not shrink as the lower garment cools after steam treatment.

[0071] Afterwards, a step (S160) of reducing the waist circumference by reducing the length of the extension member (100) by operating the adjustment member (200) in the opposite direction as needed may be additionally performed.

[0073] <2nd Example>

[0074] Looking schematically at the components of the second embodiment of the waist size expansion device according to the present invention illustrated in FIGS. 4 to 6, it consists of two pairs of expansion members (100) that are positioned in the waist portion of the lower garment and configured to be spaced apart from each other to expand the waist circumference, and an adjustment member (200) that is coupled to the expansion members (100) and configured to adjust the distance between the expansion members (100) according to operation, and to support and fix them.

[0075] The above components are explained in detail as follows.

[0076] The extension member (100) is formed in two pairs such that each pair is positioned facing each other, and the extension member (100) is composed of an extension body (110), an extension rod (120) positioned in the inner central part of the extension body (110), and a pair of nuts (140) coupled to one side of the extension rod (120).

[0077] The above extension body (110) can be formed in an arc shape so as to be positioned along the waist circumference of the lower garment.

[0078] The extension rod (120) is shaped like a rod having screw threads formed on its outer surface, is formed to protrude toward the inside of the extension body (110), and can be configured to be movable in the longitudinal direction by coupling with a pair of fixing nuts (140).

[0079] The above threads are screw-coupled with a pair of fixing nuts (140).

[0080] In addition, the extension rod (120) has screw threads formed only on its outer surface from the end to the center as an embodiment of the present invention, but is not limited thereto and the range formed may be changed according to the size of the waist size expansion device (10).

[0081] The nut (140) is screw-coupled to the threads of the extension rod (120) and serves to fix the extension rod (120) in place so that its position is maintained after it has been moved in the longitudinal direction. Accordingly, as the user adjusts the position of the extension rod (120) and then tightens the nut (140), the extension rod (120) is fixed in the set position.

[0082] In addition, the extension body (110) and the extension rod (120) are formed integrally as in one embodiment of the present invention, but are not limited thereto. A coupling part (not named, not shown) is formed so that the extension rod (120) is coupled to one end of the extension body (110), and the extension rod (120) may also be formed in a form that is fitted and coupled to the coupling part.

[0083] The above adjustment member (200) is composed of an adjustment body (210) formed in a hollow cylindrical shape, wherein the adjustment body (210) has a plurality of through holes (201) on its side.

[0084] The above through hole (201) is positioned so that the extension rod (120) is fitted and connected.

[0085] The number of the above-mentioned through holes (201) is formed in a number corresponding to the number of extension rods (120).

[0086] In addition, the second embodiment of the waist size expansion device according to the present invention is formed such that two pairs, i.e., a total of four expansion members (100), are coupled to the adjustment member (200), but is not limited thereto and can be formed such that one pair, i.e., a total of two expansion members (100), are coupled to the adjustment member (200) as in the first embodiment.

[0087] Next, a method for expanding the waist size of a lower garment according to a second embodiment of the waist size expansion device of the present invention will be described.

[0088] First, a step (S110) of placing an extension member (100) on the waist portion of the lower garment is performed. At this time, one or more pairs of extension members (100) may be positioned along the waist circumference direction such that each pair of extension members (100) faces each other.

[0089] At this time, an additional step (S115) of fixing the waistband of the lower garment and the extension member (100) with a clip or the like can be performed.

[0090] Subsequently, a step (S120) is performed to adjust the spacing between the extension members (100) through the adjustment member (200) and to support and combine the extension members (100). In the above step (S120), the waist circumference of the lower garment can be configured to expand with outward pressure of the extension body (110) as the fixing nuts (140) are released and the position of the extension rod (120) is changed.

[0091] Afterward, when the user reaches the desired waist circumference, a step (S130) of fixing the extension member (100) to fit the waist circumference is performed. In the above step (S130), the extension rod (120) is fixed by the connection of the fixing nut (140), and the configuration may be such that the extension member (100) is adjusted so as not to deviate from the position of the waist.

[0092] Afterwards, a step (S140) of applying steam to the extension member (100) and the lower garment may be added.

[0093] The above steam is formed at a temperature of about 80 to 100°C and temporarily softens the fiber structure of the lower garment material to assist in expanding the waist circumference, and maintains the expanded waist circumference after steam treatment.

[0094] The steam application time is preferably set to about 1 to 3 minutes, but can be appropriately changed depending on the type or thickness of the material of the bottom.

[0095] The above lower garment may be made of cotton, polyester, wool, nylon, or a mixture of these fibers, and the temperature and time of the steam applied to the expansion member (100) may be adjusted according to the material.

[0096] Specifically, cotton or wool bottoms can be steamed at a temperature of 90–100°C for 1–3 minutes, polyester or nylon bottoms can be steamed at a temperature of 80–90°C for 1–2 minutes, cotton / polyester blends (e.g., 65 / 35) can be steamed at a temperature of 85–95°C for 1–2 minutes, wool / nylon blends (e.g., 70 / 30) can be steamed at a temperature of 90–100°C for 1–3 minutes, and cotton / wool / polyester triple blends (e.g., 50 / 30 / 20) can be steamed at a temperature of 90–100°C for 1–3 minutes.

[0097] Afterwards, if necessary, an additional step (S150) of maintaining the fabric in an expanded state for a certain period of time or cooling can be performed so that the fibers do not shrink as the lower garment cools after steam treatment.

[0098] Afterwards, a step (S160) of reducing the waist circumference by reducing the length of the extension member (100) by operating the adjustment member (200) in the opposite direction as needed may be additionally performed.

[0100] <3rd Example>

[0101] A schematic view of the components of the third embodiment of the waist size expansion device according to the present invention illustrated in FIGS. 7 and 8 shows that it consists of a pair of expansion members (100) positioned in the waist portion of the lower garment and configured to be spaced apart from each other to expand the waist circumference, and an adjustment member (200) coupled to the expansion members (100) and configured to adjust the distance between the expansion members (100) according to operation, and to support and fix.

[0102] The above components are explained in detail as follows.

[0103] Since the above extension member (100) is identical to the extension member (100) according to the first embodiment of the present invention, a detailed description is omitted.

[0104] The above adjustment member (200) is composed of an adjustment body (210), an adjustment member housing (230) coupled to and positioned in the center of the adjustment body (210), and a handle (220) located on the upper part of the adjustment body (210) and inside the adjustment member housing (230).

[0105] The above adjustment body (210) is formed in the shape of a rod and has opposite threads formed on both sides along the length direction with a certain portion in the center, and a pair of driven gears (211) each coupled to both sides of the certain portion in the center, and the threads are formed as threads in the direction corresponding to each nut (130) and are screw-coupled with the adjustment member (200), so that a pair of extension rods (120) can be configured to move in opposite directions according to the rotation of the adjustment member (200).

[0106] The above-mentioned driven gear (211) is formed in a cylindrical shape with teeth formed on one outer circumference and is rotatably positioned in the driven gear position part (231) to mesh with the driving gear (223) of the handle (220). Accordingly, the above-mentioned driven gear (211) rotates in conjunction with the rotation direction of the handle (220). In addition, when the above-mentioned driven gear (211) is positioned in the driven gear position part (231), the toothed portion is positioned to face the inside of the control drive body (230).

[0107] The handle (220) comprises a handle body (221) formed to be gripped by a user, a handle shaft (222) connected to one side of the handle body (221) and connecting the handle body (221) and the drive gear (223), and a drive gear (223) located at the lower part of the handle shaft (222).

[0108] The above handle body (221) can function as an operating part for rotating the above adjustment body (210).

[0109] Additionally, the handle body (221) is formed in a T-shape to facilitate gripping and operation by the user, but is not limited thereto.

[0110] The above driving gear (223) is formed to be orthogonal to the driven gear (211) and meshes with the driven gear (211) at a 90-degree angle to transmit rotational force input in the vertical direction through the handle body (221) in the horizontal direction.

[0111] The above adjustment member housing (230) is formed as a rectangular prism having an internal space and is provided with a pair of driven gear position parts (231) formed open at the top, a driving gear position part (232) formed open on both sides, and a plurality of balls (233) arranged along the circumferential direction to smoothly support the rotation of the driven gear (211) inside the pair of driven gear position parts (231).

[0112] The above driven gear position portion (231) is formed so that the driven gear (211) is positioned therein and supported to be rotatable.

[0113] The above drive gear position (232) is formed so that the drive gear (223) is positioned thereon and supported to rotate in a state where it is engaged with the driven gear (211).

[0114] The above plurality of balls (233) form a ball bearing structure that supports rotation by rolling contact so that the driven gear (211) rotates smoothly.

[0115] Accordingly, the adjustment member (200) can move a pair of extension rods (120) in opposite directions simultaneously by a single rotation operation.

[0116] Next, a method for expanding the waist size of a lower garment according to a third embodiment of the waist size expansion device of the present invention will be described.

[0117] First, a step (S110) of placing an extension member (100) on the waist portion of the lower garment is performed. At this time, one or more pairs of extension members (100) may be positioned facing each other and positioned along the waist circumference direction.

[0118] At this time, an additional step (S115) of fixing the waistband of the lower garment and the extension member (100) with a clip or the like can be performed.

[0119] Subsequently, a step (S120) is performed to adjust the distance between the extension members (100) through the adjustment member (200) and to support and combine the extension members (100). In the above step (S120), the adjustment body (210) rotates by the rotation of the driven gear (211) which meshes with the driving gear (223) according to the rotation operation of the adjustment member (200) in one direction, and accordingly, the extension rod (120) of the extension member (100) moves in opposite directions, thereby allowing the waist circumference of the lower garment to be expanded by the outward pressure of the extension body (110).

[0120] Afterward, when the user reaches the desired waist circumference, a step (S130) of fixing the expansion member (100) to fit the waist circumference is performed. In the above step (S130), the rotation operation of the adjustment member (200) may be stopped and the expansion member (100) may be adjusted so that it does not deviate from the position of the waist.

[0121] Afterwards, a step (S140) of applying steam to the extension member (100) may be added.

[0122] The above steam is generally formed at a temperature of about 80 to 100°C, temporarily softens the fiber structure of the lower garment material to assist in expanding the waistline, and maintains the expanded waistline after steam treatment.

[0123] The steam application time can be adjusted to about 1 to 3 minutes, and this step can be appropriately changed depending on the type or thickness of the material of the bottoms.

[0124] The above lower garment may be made of cotton, polyester, wool, nylon, or a mixture of these fibers, and the temperature and time of the steam applied to the expansion member (100) may be adjusted according to the material.

[0125] Specifically, cotton or wool bottoms can be steamed at a temperature of 90–100°C for 1–3 minutes, polyester or nylon bottoms can be steamed at a temperature of 80–90°C for 1–2 minutes, cotton / polyester blends (e.g., 65 / 35) can be steamed at a temperature of 85–95°C for 1–2 minutes, wool / nylon blends (e.g., 70 / 30) can be steamed at a temperature of 90–100°C for 1–3 minutes, and cotton / wool / polyester triple blends (e.g., 50 / 30 / 20) can be steamed at a temperature of 90–100°C for 1–3 minutes.

[0126] Afterwards, if necessary, an additional step (S150) of maintaining the fabric in an expanded state for a certain period of time or cooling can be performed so that the fibers do not shrink as the lower garment cools after steam treatment.

[0127] Afterwards, a step (S160) of reducing the waist circumference by reducing the length of the extension member (100) by operating the adjustment member (200) in the opposite direction as needed may be additionally performed.

[0129] In addition, the first and third embodiments of the waist size expansion device according to the present invention may be provided with various types of fastening means, such as clips, hooks, and buttons, so as to be detachably coupled to the waist portion of the lower garment on the outer side of the expansion body (110) of the expansion member (100).

[0130] In addition, the expansion member (100) of the first to third embodiments of the waist size expansion device according to the present invention may be formed from a material with excellent heat resistance and dimensional stability so as not to cause deformation even in a steam environment, and may be formed from any one of the plastics of polyoxymethylene (POM), polyamide (PA), polycarbonate (PC), or polyetheretherketone (PEEK), or any one of the metal materials of stainless steel, aluminum or aluminum alloy, or titanium alloy.

[0131] In addition, the adjusting member (200) of the first to third embodiments of the waist size expansion device according to the present invention may be formed of a material having excellent strength, wear resistance, and dimensional stability to stably support the load generated during the support, fixing, or adjustment operation of the expansion member (100), and may be formed of a metal material among stainless steel, aluminum or aluminum alloy, carbon steel, brass or titanium alloy, or a high-strength synthetic resin material among glass fiber reinforced polyamide (GF-PA), polyacetal (POM), and polyphenylene sulfide (PPS).

[0132] In the foregoing, the configuration and operation of the waist size expansion device and the method of operation according to the present invention have been illustrated with reference to the detailed description and drawings; however, this is merely an example, and various changes and modifications are possible within the scope of the technical concept of the present invention. Explanation of the symbols

[0134] 10: Waist size expansion device 100: Extension member 110: Expansion unit 120: Extension load 130: Nut 140: Fixing nut 200: Adjustment member 201: Communion 210: Adjustment main body 211: Driven gear 220: Handle 221: Handle body 222: Handle shaft 223: Drive gear 230: Adjustment member housing 231: Driven gear position 232: Drive gear positioning section 233: Ball

Claims

Claim 1 The apparatus comprises at least one pair of extension members (100) positioned at the waist portion of the lower garment and configured to be spaced apart from each other to expand the waist circumference; and a control member (200) coupled to the extension members (100) and configured to adjust the distance between the extension members (100) and to support and fix them according to operation, wherein the extension members (100) are formed as a pair positioned to face each other, and the extension members (100) include an extension body (110) and a hollow rod-shaped extension rod (120) positioned at the inner center of the extension body (110) and having a nut (130) formed inside, and the control member (200) includes a rod-shaped control body (210) having opposite screw threads formed on each side along the length direction, and a polygonal column-shaped handle (220) coupled to the center of the control body (210) which can be grasped and rotated by a user, and the A waist size expansion device characterized by the extension rods (120) on both sides moving simultaneously in opposite directions in the axial direction according to the rotation of the adjustment body (210). Claim 2 At least one pair of extension members (100) positioned in the waist portion of the lower garment and configured to be spaced apart from each other to expand the waist circumference; and a control member (200) coupled to the extension members (100) and configured to adjust the distance between the extension members (100) according to operation, and to support and fix, wherein the extension members (100) are formed as a pair arranged to face each other, and the extension members (100) include an extension body (110) and a hollow rod-shaped extension rod (120) positioned in the inner central portion of the extension body (110) and having a nut (130) formed inside, and the control member (200) includes a control body (210) located within the extension rod (120), a control member housing (230) coupled to and positioned in the center of the control body (210), and the upper portion of the control body (210) and The adjustment member housing (230) includes a handle (220) located inside, and the adjustment body (210) is formed in the shape of a rod and has opposite screw threads formed on both sides along the length direction with a certain portion in the center, and a pair of driven gears (211) each coupled to both sides of the certain portion in the center, and the handle (220) includes a handle body (221) formed to be gripped by a user, a handle shaft (222) connected to one side of the handle body (221) to connect the handle body (221) and the driving gear (223), and a driving gear (223) located at the lower part of the handle shaft (222), and the adjustment member housing (230) is formed as a rectangular prism having an internal space, and includes a pair of driven gear positioning portions (231) formed open at the top, and driving gear positioning portions (232) formed open on both sides, and the pair of A waist size expansion device characterized by having a plurality of balls (233) arranged along the circumferential direction to smoothly support the rotation of the driven gear (211) inside the driven gear position part (231), and the extension rods (120) on both sides moving simultaneously in opposite directions in the axial direction according to the rotation of the adjustment body (210). Claim 3 A waist size expansion device according to claim 1 or 2, wherein the expansion member (100) additionally has a fixing means of any one of a clip, a hook, or a button on the outside of the expansion body (110). Claim 4 delete Claim 5 A waist size expansion device according to claim 1 or 2, characterized in that the expansion body (110) is formed in an arc shape. Claim 6 A waist size expansion device according to claim 1 or 2, wherein the expansion member (100) is formed from any one of the plastics of polyoxymethylene (POM), polyamide (PA), polycarbonate (PC), or polyetheretherketone (PEEK), or any one of the metals of stainless steel, aluminum, aluminum alloy, or titanium alloy. Claim 7 A waist size expansion device according to claim 1 or 2, wherein the adjusting member (200) is formed of a metal material among stainless steel, aluminum or aluminum alloy, carbon steel, brass or titanium alloy, or a high-strength synthetic resin material among glass fiber reinforced polyamide (GF-PA), polyacetal (POM), and polyphenylene sulfide (PPS). Claim 8 A step (S110) of placing at least one pair of extension members (100) on the waist portion of the lower garment; a step (S115) of securing the waist portion of the lower garment and the extension members (100) with a fastening means such as a clip, a hook, or a button after step (S110); a step (S120) of adjusting the distance between the extension members (100) through an adjustment member (200) and supporting and joining the extension members (100); a step (S130) of securing the extension members (100) to fit the waist circumference when the user reaches a desired waist circumference. The method comprises the step (S140) of applying steam to the extension member (100) and the lower garment, wherein the lower garment may be made of cotton, polyester, wool, nylon, or a mixture of these fibers, and when applying steam in the step (S140), the lower garment made of cotton or wool material may be subjected to steam at a temperature of 90~100℃ for 1~3 minutes, the lower garment made of polyester or nylon material may be subjected to steam at a temperature of 80~90℃ for 1~2 minutes, the cotton / polyester blend (e.g., 65 / 35) may be subjected to steam at a temperature of 85~95℃ for 1~2 minutes, and the wool / nylon blend (e.g., 70 / 30) may be subjected to steam at a temperature of 90~100℃ for 1~3 minutes. A method of operating a waist size expansion device characterized by applying a cotton / wool / polyester triple blend (Cotton / Wool / Polyester, e.g., 50 / 30 / 20) at a steam temperature of 90~100℃ for 1~3 minutes. Claim 9 delete Claim 10 delete Claim 11 A method of operating a waist size expansion device according to claim 8, characterized by adding a step (S150) of maintaining or cooling the lower garment in an expanded state for a certain period of time after the above step (S140).

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