Shoulder-strap-free gathering underwear with combined front buckle and preparation method of shoulder-strap-free gathering underwear

Abstract

The invention discloses shoulder-strap-free gathering underwear with a combined front buckle and a preparation method of the shoulder-strap-free gathering underwear, and belongs to the technical field of clothes. Comprising an underwear body, and the underwear body comprises two cup body structures and a rear surrounding belt; each cup body structure comprises an upper cup and a lower holding part; a material for manufacturing the cup body structure is pressed through a shaping mold to form a composite structure, then the composite structure is cut, and the connected cup mat structure is obtained; punching the conjoined cup mat structure, and cutting the conjoined cup mat structure into two independent sub cup mat structures; each sub cup mat structure is processed to obtain the cup body structure; the inner sides, close to each other, of the two cup body structures are connected through a low-elasticity small buckle and an adjustable large buckle which are distributed up and down; the inner side edges, close to each other, of the two lower holding parts extend oppositely to form protruding parts; an adjustable large buckle is fixed to the position where the two protruding parts are close to each other. The shoulder-strap-free underwear with the large buckles and the small buckles is manufactured through the underwear manufacturing method so that a user can wear the underwear quickly, and meanwhile the anti-skid performance and the supporting performance of the underwear are enhanced.

Description

Technical Field

[0001] This invention belongs to the field of clothing technology, specifically relating to a strapless push-up bra with a combined front clasp and its preparation method. Background Technology

[0002] Strapless bras are underwear that can cover and fix the breasts on the outside without the need for shoulder straps for support, allowing users to get rid of the constraints and marks of traditional bras, and are therefore very popular among women. For example, in the prior art, Chinese patent with publication number CN105942596A discloses a strapless and wire-free bra. The bra includes a left cup, a right cup, and main side panels. The main side panels are located on both sides of the left and right cups. The main side panels are composed of horizontal side panels and auxiliary side panels. One end of the horizontal side panels is fixedly connected to the left back clasp and the right back clasp. This bra can achieve the lifting and gathering effect of a bra with shoulder straps.

[0003] While the wire-free and strapless designs in the aforementioned existing technologies can improve wearing comfort, the following problems still exist in practical applications: First, the existing strapless and wire-free bras use a multi-section hook-and-eye closure design at the back. Since the wearer cannot see the hooks directly, they can only try to fasten them by touching them with their fingers, which is time-consuming, laborious, and very inconvenient. Therefore, there are problems with positioning and fastening.

[0004] Secondly, insufficient anti-slip performance is one of the main challenges faced by existing strapless bras. Due to the lack of shoulder strap support, strapless bras are prone to slipping down during use, affecting the user's wearing experience and overall appearance.

[0005] Third, strapless bras often lack sufficient support for the breasts, resulting in poor lift and shaping. To address this, some strapless bras incorporate a single connector at the front. When this connector is located in the underband, it fails to effectively restrain or limit the upper edges of the left and right cups. Due to this lack of support and fixation, the upper edges of the cups are prone to panting outwards during wear, affecting not only the overall aesthetics but also potentially reducing comfort and stability. Furthermore, the tight and non-adjustable underband further restricts the wearer's comfort and freedom of movement. When the connector is positioned between the two cups, the underband provides insufficient support for both breasts, preventing the bra from achieving the desired lift and shaping effect. Therefore, single connector designs are often not robust and ultimately fail to effectively improve the lift and shaping effect. Summary of the Invention

[0006] To address the problems in related technologies, this invention proposes a strapless push-up bra with a combined front clasp and its manufacturing method, thereby overcoming the aforementioned technical problems existing in the prior art. This invention manufactures a strapless bra with large and small clasps through a bra manufacturing method, facilitating quick wear by the user while enhancing the bra's anti-slip and support properties.

[0007] The technical solution of the present invention is implemented as follows: a strapless push-up bra with a combined front buckle, comprising a bra body, wherein the bra body includes two cup structures disposed at the front and a back band connecting the two cup structures as one unit; Each of the cup structures includes an upper cup and a lower flap connected to the upper cup; The materials used to make the cup body structure are pressed together using a shaping mold to form a composite structure. The composite structure is then cut to obtain a one-piece coaster structure. The one-piece coaster structure is then punched and cut into two independent sub-coaster structures. Each sub-coaster structure is processed to obtain the cup body structure. The inner sides of the two cup structures that are close to each other are connected by small, low-elastic buckles and large, adjustable buckles distributed on the top and bottom; The inner sides of the two lower sections extend towards each other to form protrusions; the adjustable buckle is fixed at the position where the two protrusions are close together. The rear band has side panels at its left and right ends for wrapping the accessory breast, and the two side panels are respectively connected to the outer edges of the two cup structures; The inner side of the rear band is provided with an elastic back strap for adjusting the tightness.

[0008] Furthermore, the adjustable buckle may be a single-row buckle, a multi-row buckle, a single buckle, or a retractable buckle.

[0009] Furthermore, the adjustable buckle includes a hook and a hooked part that interlock with each other, wherein the hooked part has at least two rows; the hook and the hook are respectively connected to the lower part on different sides by means of fitting or sewing. Furthermore, the hook and the hooked part are respectively embedded in the protrusions on different sides.

[0010] Furthermore, the outer edge of the protrusion extends beyond the inner edge of the upper cup.

[0011] Furthermore, the low-elasticity buckle includes a female buckle and a female buckle that interlock with each other, and the female buckle has at least one locking position; both the female buckle and the female buckle are connected to the corresponding upper cup through a low-elasticity buckle strap.

[0012] Furthermore, the back band is located at the back of the underwear body, and the back band is a double-layer elastic structure without a back buckle; the elastic back strap is provided with an adjustable buckle; the elasticity of the elastic back strap is greater than that of the back band.

[0013] Furthermore, the rear shoulder strap includes an inner and outer fabric layer and a skin-contact layer, and the elastic back strap is disposed on the skin-contact layer; The skin-adhesive layer includes two positioning parts, each of which includes a positioning fabric piece and a positioning cartilage, with the positioning cartilage disposed between the positioning fabric piece and the skin-adhesive layer; when worn, each of the positioning parts is in close contact with the underarm skin; Both ends of the elastic shoulder strap extend at least to the positioning portion.

[0014] Furthermore, the shaping mold includes an upper mold and a lower mold arranged opposite each other in a vertical direction. The upper mold has two parallel protrusions on its end face facing the lower mold, and the two protrusions extend and protrude toward the lower mold. The lower mold has two parallel grooves on its end face facing the upper mold, and the outline shape of the two grooves is adapted to the two protrusions. Each of the grooves has a cup groove at the position corresponding to the upper cup and a lower groove at the position corresponding to the lower part; the two cup grooves are connected by a central ridge; the lower part of the cup groove is connected to the lower groove. Furthermore, the depth of the cup groove is greater than the depth of the lower groove; The material for making the two cup structures is placed in the groove of the lower mold, and then the upper mold is closed with the lower mold. The material for making the cup structure is heated and pressed between the protrusion and the groove.

[0015] A method for manufacturing underwear, applied to the aforementioned strapless push-up underwear with a combined front clasp; the method for manufacturing underwear includes steps S1-S12, as follows: Step S1: Prepare the materials for the back band, two cup structures, low-elasticity small buckle, and adjustable large buckle.

[0016] Step S2: Perform a shaping process on the materials used to make the two cup structures to obtain a composite structure.

[0017] Step S3: Pre-determine a breast size range, and use ultrasonic cutting technology to cut the composite structure after the first shaping to form a one-piece cup pad structure that fits the pre-determined breast size; It should be noted that, according to different breast sizes, bra cups on the market are generally defined as follows: an upper and lower bust measurement difference of about 10 cm is defined as an A cup, about 12.5 cm as a B cup, about 15 cm as a C cup, about 17.5 cm as a D cup, and about 20 cm as an E cup. This invention uses the above-mentioned A / E cup data to configure the data to be cut by the ultrasonic cutting mold.

[0018] Step S4: Use a punching device to punch holes in the cut one-piece coaster structure to form a heart-shaped hole; then cut the punched one-piece coaster structure into two independent sub-coaster structures. It should be noted that the punching device uses a red crosshair to align with the center hole of the integrated coaster structure, and then uses the punching head to stamp and form the shape.

[0019] Step S5: Bind the lower edge of the underside of each sub-cup pad structure; first, fold a strip in half to form two halves, one half is sewn onto the outer surface of the underside by a flatbed sewing machine, and the other half is attached to the skin-contacting surface of the underside by a hot-press hot melt adhesive process; then press the underside together with a flatbed press to make it flat.

[0020] Step S6: Prepare the rear band.

[0021] Step S7: Connect the adjustable buckle; place the hook and the hooked part on the underside of two different sub-cup coaster structures, with the end closest to the center hole; the hooked part includes a connected hook ring and a limiting part; cut two underside fabric pieces; the underside fabric pieces are attached to the skin-contacting surface of the underside; the underside fabric pieces have openings for the hook ring to pass through, and the limiting part is embedded between the underside fabric pieces and the skin-contacting surface of the underside; Furthermore, the undershirt fabric is bonded to the skin-contacting surface of the undershirt by an adhesive layer, the thickness of which ranges from 1.200 to 1.400 mm / μm; One end of the hook is exposed on the underband fabric of the other underband and is used to fasten with the hook loop, while the other end of the hook is embedded between the underband fabric and the skin-contacting surface of the underband.

[0022] Step S8: Perform a secondary shaping process on the sub-cup pad structure after connecting the adjustable buckle; Step S9: Connect the two sub-cup pad structures that have undergone secondary shaping to the two ends of the back band to obtain a semi-finished product; first apply adhesive to the side edges of the two sub-cup pad structures, and then attach the two ends of the back band to the corresponding adhesive areas.

[0023] Step S10: Repeat the secondary shaping process in step S8 on the semi-finished product.

[0024] Step S11: Connect the low-elastic small buckle; first, barcode the inner edge of the upper cup to form a buckle position, which is used to connect the female or male buckle. Step S12: Attach multiple shoulder strap positions to the skin-contact surface of the skin-contact layer for detachable connection with the shoulder strap.

[0025] Furthermore, in step S1, the materials used to make the two cup structures include a first upright cotton, a first shaping yarn, a supporting cotton, a second shaping yarn, a second upright cotton, and an inner cotton layer; the materials used to make the back band include an outer fabric layer and a skin-contact layer; the low-elasticity small buckle includes a male buckle and a female buckle; the adjustable large buckle includes a hook and a hooked part; the first upright cotton and the inner cotton layer are both pre-pressed one-piece cotton layer structures.

[0026] Further, in step S2, a one-piece first vertical cotton is first placed on the two grooves of the lower mold, then the first shaping yarn is placed on the middle ridge, and the two supporting cottons are placed on the lower part of the two cup grooves respectively; then the second shaping yarn is placed on the lower groove, and then the two pieces of second vertical cotton are placed on the two grooves respectively, and the lower mold is completely covered by a one-piece inner cotton; finally, the two cup structures are pressed into a composite structure by a hot pressing shaping process. It should be noted that: the first piece of cotton is pressed once by the shaping mold before step S2 is performed; the thickness of the first piece of cotton before the first pressing is 3-5mm, preferably 4mm in this invention; All of the aforementioned shaping yarns are inelastic sheet-like structures; The thickness of each of the supporting cottons is 2-4 mm, and preferably 3 mm in this invention; The thickness of the inner cotton layer is 3-5mm, and preferably 4mm in this invention; The molding temperature range for the first hot pressing and setting process is 185~195℃, and the setting time is 400~420s; The composite structure forms a crease line corresponding to the upper cup, and the crease line forms an angle A with the central axis of the upper cup. The angle A is beneficial for gathering and supporting the breasts. The length of the crease line is 4-6cm, preferably 5cm in this invention.

[0027] Further, step S6 includes the following steps: Step S6a: First, cut two large pieces of fabric. One large piece of fabric is used as the face fabric layer and the other large piece of fabric is used as the skin-adhesive layer. Then, apply jelly glue to one of the large pieces of fabric. Next, heat press the face fabric layer and the skin-adhesive layer together along the upper and lower edges to form the upper and lower parts respectively. Furthermore, the fabric layer and the skin-adhesive layer form a non-adhesive cavity between the upper and lower parts; Step S6b: Cut two small pieces of fabric, brush jelly glue onto one of the small pieces of fabric, and then stick the two small pieces of fabric together completely to form an elastic strap; Furthermore, both the elastic shoulder straps and the rear band are made of non-slip fabric; Furthermore, the elastic shoulder strap is made of spandex. Step S6c: Place a pair of positioning side bones on the skin-adhesive surface of the skin-adhesive layer, then cover the positioning side bones with an adhesive positioning cloth, and then attach the positioning ears to the positioning cloth. Use a high-temperature hot-pressing process to bond and fix the positioning cloth and positioning ears together at high temperature. Finally, use a flatbed sewing machine to add and fix the positioning ears. The heating temperature range is 168~208℃, the hot-pressing time is about 28s, and the cold-pressing time is 30s. On the same side surface, the skin-adhesive layer is provided with a number of anti-slip lines at intervals on the left and right ends; Furthermore, each of the anti-slip lines is an arc that protrudes towards the positioning part.

[0028] Further, in step S8, the secondary shaping process includes a first high-temperature shaping process and a first cooling shaping process; the first high-temperature shaping process refers to hot pressing by a hot pressing device for 30 seconds; the first cooling shaping process refers to cold pressing by a cold press for 10 seconds.

[0029] Furthermore, the cup structure includes an outer cup surface and an inner cup surface, the inner cup surface being used to contact the chest skin; Each of the side panels is connected to the side edge of the corresponding inner cup surface, forming an inner arc transition line on the inner cup surface, and an outer arc transition line is formed on the outer fabric layer; each arc transition line extends from the upper edge of the cup structure to the lower edge of the underband; when worn, both the inner and outer arc transition lines cover the side edges of the breast. Furthermore, on the same side, the skin-adhesive layer is provided with a plurality of anti-slip lines between the inner arc transition line and the positioning portion.

[0030] The beneficial effects of this invention are: (1) The present invention manufactures a strapless push-up bra with large and small buckles by a bra manufacturing method. The low elastic small buckle is used to connect the two upper cups, and the adjustable large buckle is used to adjust the length of the underband. Through the cooperation of the combined front buckle, the user can quickly put on the strapless push-up bra, avoiding the inconvenience caused by the traditional back buckle design. The strapless push-up bra of the present invention is more convenient and practical.

[0031] (2) The low-elastic small buckle can guide the breasts to gather towards the center when worn, thereby creating a fuller and more three-dimensional breast line, and can also prevent the upper cup from flipping forward; at the same time, the adjustable large buckle can flexibly adjust the length of the underband through its adjustment function to adapt to the underbust size of different wearers. This design not only improves the applicability of the underwear, but also ensures the comfort and fit when wearing it; the adjustable large buckle also enhances the tightness of the connection between the two sides of the underband, improves the support of the underband for the upper cup, effectively prevents the upper cup from slipping down during the wearing process, and further enhances the stability and wearing effect of the underwear. Attached Figure Description

[0032] Figure 1 This is a front view of the underwear body in Example 1. Figure 2 This is a rear view of the underwear body in Example 1 when worn; Figure 3 This is a rear view of the underwear body after it has been unfolded in Example 1; Figure 4 This is a front view of the underwear body after it has been unfolded in Example 1; Figure 5 This is a partial structural diagram of the shaping mold in Example 1; Figure 6 This is a cross-sectional view showing the separation of the upper mold and the lower mold in Example 1; Figure 7 This is a top view of the lower mold in Example 1; Figure 8 This is a schematic diagram showing the separation of the first upright cotton, the first shaping yarn, the supporting cotton, the second shaping yarn, the second upright cotton, and the inner layer cotton in Example 1. Figure 9 This is a schematic diagram of the integrated coaster structure and auxiliary adhesive film in Example 1; Figure 10 This is a schematic diagram of the punched structure of the one-piece coaster in Example 1; Figure 11 This is a schematic diagram of the structure of one side of the cup body in Example 1; Figure 12 This is a schematic diagram of the separation of the lower fabric piece, the hook, and the cup body structure in Example 1; Figure 13 This is a schematic diagram of the structure of the other side of the cup in Example 1; Figure 14 This is a schematic diagram of the separation of the underlay fabric piece, hook, and cup body structure in Example 1; Figure 15 This is a schematic diagram of the structure of the rear band manufacturing material in Example 1; Figure 16 This is a schematic diagram of the structure after the rear band in Example 1 has been prepared. Figure 17 This is a front view of the underwear body after it has been unfolded in Example 2.

[0033] Marker explanation: 1. Cup body structure; 11. Outer cup surface; 12. Inner cup surface; 13. Bottom flap; 131. Bottom flap fabric piece; 132. Protrusion; 14. Upper cup; 2. Back band; 21. Outer fabric layer; 22. Skin-contact layer; 23. Side panels; 231. Anti-slip lines; 24. Elastic back straps; 241. Adjustable buckles; 25. Inner curved transition line; 26. Outer curved transition line; 27. Positioning part; 271. Positioning cartilage; 272. Positioning fabric piece; 28. Shoulder strap position; 3. Shaping mold; 31. Upper mold; 311. Protrusion; 32. Lower mold; 321. Cup groove; 322. Lower groove; 33. Middle ridge; 4. Low-elasticity small buckle; 41. Low-elasticity buckle strap; 5. Adjustable large buckle; 51. Hook; 52. Hooked part; 521. Hook ring; 6. Composite structure; 61. First upright cotton; 62. First shaping yarn; 63. Supporting cotton; 64. Second shaping yarn; 65. Second upright cotton; 66. Inner layer cotton; 7. One-piece coaster structure; 71. Gore hole; 8. Auxiliary adhesive film. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Example 1 like Figure 1-16As shown, this embodiment provides a strapless push-up bra with a combined front clasp, including a bra body, the bra body including two cup structures 1 disposed at the front, and a back band 2 connecting the two cup structures 1 into one piece; Each of the cup structures 1 includes an upper cup 14 and a lower flap 13 connected to the upper cup 14; The material used to make the cup body structure 1 is pressed into a composite structure 6 through a shaping mold 3. The composite structure 6 is then ultrasonically cut to obtain a one-piece coaster structure 7. The one-piece coaster structure 7 is then punched and cut into two independent sub-coaster structures. After processing each sub-coaster structure, the cup body structure 1 is obtained. The inner sides of the two cup structures 1 that are close to each other are connected by small, low-elastic buckles 4 distributed on the top and bottom and large, adjustable buckles 5. The inner sides of the two lower parts 13 extend toward each other to form protrusions 132; the adjustable buckle 5 is fixed at the position where the two protrusions 132 are close to each other; The left and right ends of the rear band 2 are respectively provided with side panels 23 for wrapping the accessory breast, and the two side panels 23 are respectively connected to the outer sides of the two cup structures 1. The inner side of the rear band 2 is provided with an elastic back strap 24 for adjusting the tightness.

[0037] It should be noted that: after the low-elastic small buckle 4 and the adjustable large buckle 5 are connected in sequence, the tightening connection of the adjustable large buckle 5 will cause the upper part of the two upper cups 14 to be stretched laterally outward of the chest. At this time, the upper part of the two upper cups 14 can be stretched laterally by tightening the elastic back strap 24. First, this embodiment features a combination front clasp, where the low-elasticity small clasp 4 connects the two upper cups 14, and the adjustable large clasp 5 adjusts the length of the underband 13. Through the cooperation of the combination front clasps, users can quickly put on the strapless push-up bra, avoiding the inconvenience of traditional back clasp designs. The strapless push-up bra described in this embodiment is more convenient and practical.

[0038] Secondly, the low-elasticity small buckle 4 guides the breasts towards the center when worn, thus creating a fuller, more three-dimensional breast line and preventing the upper cup 14 from flipping forward. At the same time, the adjustable large buckle 5 can flexibly adjust the length of the underband 13 to adapt to different wearers' underbust sizes. This design not only improves the applicability of the bra but also ensures comfort and fit when worn. The adjustable large buckle 5 also enhances the tightness of the connection between the two underbands 13, improves the support of the underband 13 for the upper cup 14, effectively prevents the upper cup 14 from slipping down during wear, and further enhances the stability and wearing effect of the bra.

[0039] Moreover, the elastic back strap 24, as part of the bra body, can further tighten the two upper cups 14 laterally through its elastic adjustment function, thereby effectively preventing the bra body from slipping down during wear.

[0040] Furthermore, this embodiment achieves the effects of gathering, lifting, and preventing slippage by working together through the low-elasticity small buckle 4, the adjustable large buckle 5, and the elastic back strap 24. This allows the strapless push-up bra to maintain comfort and freedom of movement while still providing support, support, and preventing slippage, even without shoulder straps.

[0041] Specifically, the adjustable buckle 5 includes a single-row buckle, a multi-row buckle, a single buckle, or a retractable buckle; It should be noted that this embodiment does not limit the type of the adjustable large buckle 5, and various buckle types that can adjust the length of the lower part 13 have the same technical effect; nor does it limit the specific number of rows of buckles, and single row or multiple row have the same technical effect.

[0042] Specifically, the adjustable buckle 5 includes a hook 51 and a hooked part 52 that interlock with each other, wherein the hooked part 52 has at least two rows; the hook 51 and the hooked part 52 are respectively connected to the lower part 13 on different sides by means of fitting or sewing. More specifically, the hook 51 and the hooked part 52 are respectively embedded in the protrusions 132 on different sides; Specifically, the outer edge of the protrusion 132 extends beyond the inner edge of the upper cup 14. It should be noted that in this embodiment, the hook 51 and the hooked part 52 are preferably embedded in the protrusion 132 in a close fit. Compared with the traditional sewing method, the close fit can reduce the number of sutures, thereby avoiding friction between the sutures and human skin.

[0043] Specifically, the low-elasticity buckle 4 includes a female buckle and a female buckle that are interlocked with each other, and the female buckle has at least one locking position; the female buckle and the female buckle are both connected to the corresponding upper cup 14 through the low-elasticity buckle strap 41. The low-elasticity buckle 41, with its moderate elasticity, allows the two upper cups 14 to guide the breasts towards the center when worn, and also has a certain degree of stability, which can prevent the upper cups 14 from shifting due to external force or movement, ensuring the long-lasting and stable wearing effect of the underwear.

[0044] Specifically, the back band 2 is located on the back of the bra body, and the back band 2 is a double-layer elastic structure without a back buckle; the elastic back strap 24 is provided with an adjustable buckle 241; the elasticity of the elastic back strap 24 is greater than that of the back band 2. The lateral elastic tension of the elastic back strap 24, combined with the elastic contraction of the back band 2, allows the front of the bra to fit snugly against the chest and the back to fit snugly against the back, further enhancing the gathering and anti-slip-down effect of the strapless push-up bra.

[0045] Specifically, the rear band 2 includes an inner and outer fabric layer 21 and a skin-contact layer 22, and the elastic back strap 24 is disposed on the skin-contact layer 22; The skin-adhesive layer 22 includes two positioning parts 27, each positioning part 27 including a positioning fabric piece 272 and a positioning cartilage 271, the positioning cartilage 271 being disposed between the positioning fabric piece 272 and the skin-adhesive layer 22; when worn, each positioning part 27 is in close contact with the underarm skin; Both ends of the elastic shoulder strap 24 extend at least to the positioning portion 27.

[0046] Specifically, the shaping mold 3 includes an upper mold 31 and a lower mold 32 arranged opposite each other in a vertical direction. The upper mold 31 has two parallel protrusions 311 on its end face facing the lower mold 32, and the two protrusions 311 extend and protrude toward the lower mold 32. The lower mold 32 has two parallel grooves on its end face facing the upper mold 31, and the outline shape of the two grooves is adapted to the two protrusions 311. Each of the grooves has a cup groove 321 at the position corresponding to the upper cup 14, and a lower groove 322 at the position corresponding to the lower pull part 13; the two cup grooves 321 are connected by a middle ridge 33; the lower part of the cup groove 321 is connected to the lower groove 322; More specifically, the depth of the cup groove 321 is greater than the depth of the lower groove 322; The material for making the two cup body structures 1 is placed in the groove of the lower mold 32, and then the upper mold 31 and the lower mold 32 are closed. The material for making the cup body structure 1 is heated and pressed between the protrusion 311 and the groove.

[0047] This embodiment also provides a method for manufacturing underwear, applied to the above-mentioned strapless push-up underwear with a combined front clasp; the underwear manufacturing method includes steps S1-S11, as follows: Step S1: Prepare the materials for making the back band 2, two cup structures 1, low-elastic small buckle 4 and adjustable large buckle 5.

[0048] Step S2: Perform a shaping process on the materials used to make the two cup structures 1 to obtain the composite structure 6.

[0049] Step S3: Preset a breast size range, cut the composite structure 6 after the first shaping through ultrasonic cutting process, and form a one-piece cup pad structure 7 that fits the preset breast size; It should be noted that, according to different breast sizes, bra cups on the market are generally defined as follows: an upper and lower bust measurement difference of about 10 cm is defined as an A cup, about 12.5 cm as a B cup, about 15 cm as a C cup, about 17.5 cm as a D cup, and about 20 cm as an E cup. In this embodiment, the data to be cut by the ultrasonic cutting mold is configured based on the above-mentioned A / E cup data.

[0050] Step S4: Use a punching device to punch holes in the cut one-piece coaster structure 7 to form a heart-shaped hole 71; then cut the punched one-piece coaster structure 7 into two independent sub-coaster structures. It should be noted that: before punching, an auxiliary adhesive film 8 is placed first, and then the integrated coaster structure 7 is placed; and the punching device is aligned with the position of the heart-shaped hole 71 of the integrated coaster structure 7 by using a red crosshair, and then the punching head is used for stamping.

[0051] Step S5: Bind the lower edge of the underpart 13 of each sub-cup pad structure; first, fold a strip in half to form two halves, one half is sewn onto the outer surface of the underpart 13 by a flatbed sewing machine, and the other half is attached to the skin-contacting surface of the underpart 13 by a hot-press hot melt adhesive process; then press the underpart 13 with a flatbed press to make it flat.

[0052] Step S6: Prepare the rear band 2.

[0053] Step S7: Connect the adjustable buckle 5; place the hook 51 and the hooked part on the underparts 13 of two different sub-cup coaster structures respectively, and place them at the end near the center hole 71; the hooked part includes a connected hook ring 521 and a limiting part; cut two underpart fabric pieces 131; the underpart fabric pieces 131 are attached to the skin-contact surface of the underparts 13; the underpart fabric pieces 131 have openings for the hook ring 521 to pass through, and the limiting part is embedded between the underpart fabric pieces 131 and the skin-contact surface of the underparts 13; More specifically, the undershirt fabric piece 131 is bonded to the skin-contact surface of the undershirt part 13 by an adhesive layer, the thickness of which ranges from 1.200 to 1.400 mm / μm; One end of the hook 51 is exposed to the underpatch fabric 131 of the other underpatch 13 and is used to fasten with the hook ring 521, while the other end of the hook 51 is embedded between the underpatch fabric 131 and the skin-contacting surface of the underpatch 13. In this embodiment, the limiting part, the hook 51, etc. are all embedded in the form of a more concealed and aesthetically pleasing hook 51 and hooked part 52.

[0054] Step S8: The sub-cup pad structure connected to the adjustable buckle 5 is subjected to a secondary shaping process. The secondary shaping process specifically includes a first high-temperature shaping process and a first cooling shaping process. The first high-temperature shaping process refers to hot pressing by a hot pressing device for 30 seconds. The first cooling shaping process refers to cold pressing by a cold press for 10 seconds. Step S9: Connect the two sub-cup pad structures that have undergone secondary shaping to the two end side panels 23 of the back band 2 to obtain a semi-finished product; first apply adhesive to the side edges of the two sub-cup pad structures, and then attach the two end side panels 23 of the back band 2 to the corresponding adhesive areas.

[0055] Step S10: Repeat the secondary shaping process in step S8 on the semi-finished product.

[0056] Step S11: Connect the low-elastic small buckle 4; first, bar-tapping is performed on the inner edge of the upper cup 14 to form a buckle position, which is used to connect the female buckle or the male buckle.

[0057] Specifically, in step S1, the materials used to make the two cup structures 1 include a first upright cotton 61, a first shaping yarn 62, a supporting cotton 63, a second shaping yarn 64, a second upright cotton 65, and an inner cotton 66; the materials used to make the back band 2 include an outer fabric layer 21 and a skin-contact layer 22; the low-elasticity small buckle 4 includes a female buckle and a male buckle; the adjustable large buckle 5 includes a hook 51 and a hooked part; the first upright cotton 61 and the inner cotton 66 are both pre-pressed one-piece cotton layer structures.

[0058] Specifically, in step S2, a one-piece first vertical cotton 61 is first placed on the two grooves of the lower mold 32, then the first shaping yarn 62 is placed on the middle ridge 33, and the two supporting cottons 63 are respectively placed on the lower part of the two cup grooves 321; then the second shaping yarn 64 is placed on the lower groove 322, and then two pieces of second vertical cotton 65 are respectively placed on the two grooves, and the lower mold 32 is completely covered by a one-piece inner cotton 66; finally, the two cup structures 1 are pressed into a composite structure 6 by a hot pressing shaping process. It should be noted that: the first piece of cotton 61 is pressed once by the shaping mold 3 before step S2 is performed; the thickness of the first piece of cotton 61 before the first pressing is 3-5mm, and in this embodiment it is preferably 4mm; All of the aforementioned shaping yarns are inelastic sheet-like structures; The thickness of each of the supporting cotton 63 is 2-4mm, and in this embodiment it is preferably 3mm; The thickness of the inner cotton 66 is 3-5mm, and in this embodiment it is preferably 4mm; The molding temperature range for the first hot pressing and setting process is 185~195℃, and the setting time is 400~420s; The composite structure 6 forms a crease line corresponding to the upper cup 14. The crease line forms an angle A with the central axis of the upper cup 14. The angle A is beneficial for gathering and supporting the breasts. The length of the crease line is 4-6cm, preferably 5cm in this embodiment. This crease line makes the skin-contact surface of the upper cup 14 form a palm-like indentation to better support the breasts. At the same time, the side push strengthens the gathering and achieves the effect of no empty cup.

[0059] Specifically, step S6 includes the following steps: Step S6a: First, cut two large pieces of fabric. One large piece of fabric is used as the face fabric layer 21, and the other large piece of fabric is used as the skin-adhesive layer 22. Then, apply jelly glue to one of the large pieces of fabric. Then, heat-press the face fabric layer 21 and the skin-adhesive layer 22 together along the upper and lower edges to form the upper and lower parts respectively. More specifically, the fabric layer 21 and the skin-adhesive layer 22 form a non-adhesive cavity between the upper and lower portions; It should be noted that in this embodiment, jelly glue is applied to the upper and lower edges of one of the large fabric pieces; the jelly glue on the upper edge is larger than that on the lower edge, and there are two vertical jelly glue strips between the upper and lower jelly glue as support strips. In this embodiment, the thickness of the adhesive layer formed after hot pressing of the jelly adhesive ranges from 1.200 to 1.400 mm / μm; The cavity design helps reduce the use of adhesive and makes it more breathable, thus allowing the rear band 2 to maintain its original elasticity. Step S6b: Cut two small pieces of fabric, brush jelly glue on one of the small pieces of fabric, and then stick the two small pieces of fabric together to form an elastic strap 24. In this embodiment, the elastic design of the elastic back straps 24 and the back band 2 enables each of the elastic back straps 24 to provide stronger support and stability for the bra-wearing garment, ensuring that the bra-wearing garment remains stable during exercise or daily activities and reducing the risk of slipping or shifting. Specifically, the elastic shoulder straps 24 and the back band 2 are both made of non-slip fabric, which makes each of the elastic shoulder straps 24 skin-friendly and non-slip, further preventing the elastic shoulder straps 24 and the back band 2 from slipping down, while also being lighter and thinner. More specifically, the elastic shoulder strap 24 is made of spandex, which gives it better elasticity and good resilience. Even after repeated stretching, it can quickly return to its original shape, preventing the elastic shoulder strap 24 from deforming or loosening due to long-term use and extending the product's lifespan. Moreover, spandex is lightweight and soft, which can reduce friction and pressure on the back skin, improve wearing comfort, and is especially suitable for long-term wear. Step S6c: Place a pair of positioning side bones on the skin-adhesive surface of the skin-adhesive layer 22, then cover the positioning side bones with an adhesive positioning cloth 272, and then attach the positioning ear to the positioning cloth 272. Use a high-temperature hot-pressing process to bond and fix the positioning cloth 272 and the positioning ear at high temperature; finally, use a flat sewing machine to sew the fixing ear; wherein, the heating temperature range is 168~208℃, the hot-pressing time is about 28s, and the cold-pressing time is 30s; On the same side surface 23, the skin-adhesive layer 22 is provided with a plurality of anti-slip lines 231 at intervals on the left and right side surfaces 23; More specifically, each of the anti-slip lines 231 is an arc protruding toward the positioning part 27; It should be noted that each of the anti-slip lines 231 is formed by a glue application process; first, glue lines are applied to the side 23, and then the side 23 is baked in an oven to form the anti-slip lines 231. In this embodiment, the anti-slip lines 231 are mainly used to tighten the accessory breast and underarm fat, and can also enhance the support of the side panels 23, making the side panels 23 more stable and less prone to deformation.

[0060] Specifically, the cup structure 1 includes an outer cup surface 11 and an inner cup surface 12, wherein the inner cup surface 12 is used to contact the chest skin; Each of the side panels 23 is connected to the side edge of the corresponding inner cup surface 12, and forms an inner arc transition line 25 on the inner cup surface 12, while forming an outer arc transition line 26 on the outer fabric layer 21; each arc transition line extends from the upper edge of the cup structure 1 to the lower edge of the underband 13; when worn, both the inner and outer arc transition lines 26 cover the side edges of the breast; The inner and outer arc transition lines 26 significantly shorten the horizontal width of the traditional cup. At the same time, the side panels 23, which are thinner than the cup, are used to wrap the accessory breast. This can tighten the accessory breast and avoid excessive pressure on it, thereby reducing friction on the underarm skin and further improving the comfort of wearing it. More specifically, on the same side 23, the skin-adhesive layer 22 is provided with a plurality of anti-slip lines 231 between the inner arc transition line 25 and the positioning part 27.

[0061] Example 2 like Figure 17As shown, this embodiment also provides a method for preparing underwear. Features not explained in this embodiment can be explained using the methods in Embodiment 1, and will not be repeated here. The difference between this embodiment and Embodiment 1 is: The method for preparing the underwear includes steps S1-S12, as follows: Step S1: Prepare the materials for making the back band 2, two cup structures 1, low-elastic small buckle 4 and adjustable large buckle 5; Step S2: Perform a shaping process on the materials used to make the two cup structures 1 to obtain the composite structure 6; Step S3: Preset a breast size range, cut the composite structure 6 after the first shaping through ultrasonic cutting process, and form a one-piece cup pad structure 7 that fits the preset breast size; Step S4: Use a punching device to punch holes in the cut one-piece coaster structure 7 to form a heart-shaped hole 71; then cut the punched one-piece coaster structure 7 into two independent sub-coaster structures. Step S5: Bind the lower edge of the lower part 13 of each of the sub-cup pad structures; then press the lower part 13 with a flat press to make it flat; Step S6: Prepare the rear band 2; Step S7: Connect the adjustable buckle 5; Step S8: Perform a secondary shaping process on the sub-cup pad structure after connecting the adjustable buckle 5; Step S9: Connect the two sub-cup pad structures that have undergone secondary shaping to the two end side panels 23 of the back band 2 respectively to obtain a semi-finished product; Step S10: Repeat the secondary shaping process in step S8 on the semi-finished product; Step S11: Connect the low-spring buckle 4; Step S12: Connect multiple shoulder strap positions 28 to the skin-contact surface of the skin-contact layer 22 for detachable connection with the shoulder strap; It should be noted that the detachable shoulder straps allow the bra to be worn in multiple ways, either as a strapless bra or as a bra with shoulder straps.

[0062] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A no-shoulderband body-hugging bra with combined front fastener, comprising a bra body, the bra body comprising two cup structures arranged at the front and a back band connecting the two cup structures, characterized in that: each cup structure comprises an upper cup and a lower flange connected with the upper cup; the material for making the cup structure is pressed into a compound structure through a shaping mold, and the compound structure is cut to obtain a connected cup pad structure; the connected cup pad structure is then punched and cut into two independent sub-cup pad structures; each sub-cup pad structure is processed to obtain the cup structure; the inner sides of the two cup structures close to each other are connected by upper and lower low-elastic small fasteners and adjustable large fasteners; the inner sides of the two lower flanges close to each other extend towards each other to form protrusions; the adjustable large fasteners are fixed at positions close to the two protrusions; the left and right ends of the back band are respectively provided with side straps for wrapping around secondary breasts, and the two side straps are respectively connected with the outer sides of the two cup structures; the adjustable large fastener comprises a hook and a hooked part that are buckled with each other; the hook and the hooked part are respectively connected to the protrusions on different sides; the outer sides of the protrusions extend beyond the inner sides of the upper cups; the inner side of the back band is provided with an elastic strap for adjusting the tightness; the back band is located at the back of the bra body, and the back band is a double-layer elastic structure without back fastener; the elasticity of the elastic strap is greater than that of the back band; the back band comprises an inner fabric layer and a skin-contacting layer arranged in layers, and the elastic strap is arranged on the skin-contacting layer; the skin-contacting layer comprises two positioning parts, each positioning part comprises a positioning cloth piece and a positioning soft bone, and the positioning soft bone is arranged between the positioning cloth piece and the skin-contacting layer; the two ends of the elastic strap extend at least to the positioning parts; the shaping mold comprises an upper mold and a lower mold arranged opposite in the vertical direction, the upper mold is provided with two parallel protrusions on the end face facing the lower mold, and the two protrusions extend and protrude towards the lower mold; the lower mold is provided with two parallel grooves on the end face facing the upper mold, and the profile shapes of the two grooves are matched with the two protrusions; each groove is provided with a cup groove at a position corresponding to the upper cup and a lower flange groove at a position corresponding to the lower flange; the two cup grooves are connected by an intermediate ridge; the lower part of the cup groove is connected with the lower flange groove; the material for making the two cup structures is placed in the groove of the lower mold, and the upper mold and the lower mold are closed to heat and press the material for making the cup structure between the protrusions and the grooves. The method is applied to the no-shoulderband body-hugging bra with combined front fastener; the method comprises the following steps: step S1: preparing the materials for making the back band, the two cup structures, the low-elastic small fasteners and the adjustable large fasteners; step S2: performing a shaping treatment on the materials for making the two cup structures to obtain a compound structure; ​ ​ ​ ​ 2. A strapless body con vest with a combined front fastening according to claim 1, characterized in that, ​ ​ 3. A strapless body con vest with a combined front fastening according to claim 2, characterized in that, ​ ​ 4. A strapless body con vest with a combined front fastening according to claim 3, characterized in that, ​ ​ ​ 5. The strapless body con vest with combined front closure according to any one of claims 1-4, wherein, ​ ​ ​ 6. A method of manufacturing an undergarment, characterized by, ​ ​ ​ Step S3: preset a chest size range, cut the first shaped composite structure by ultrasonic cutting process, and form a one-piece cup pad structure suitable for the preset chest size; Step S4: punch the cut one-piece cup pad structure by a punching device to form a dart; then cut the punched one-piece cup pad structure into two independent sub-cup pad structures; Step S5: edge cover the lower edge of the lower flange of each sub-cup pad structure; then press the lower flange flat by a flat press; Step S6: prepare a back band; Step S7: connect an adjustable big buckle; Step S8: perform secondary shaping treatment on the sub-cup pad structure connected with the adjustable big buckle; Step S9: connect the two sub-cup pad structures after secondary shaping treatment with the two ends of the back band respectively to obtain a semi-finished product; Step S10: repeat the secondary shaping treatment in step S8 on the semi-finished product; Step S11: connect a low-elastic small buckle.

7. A method of manufacturing an undergarment according to claim 6, wherein, In the step S1, the materials of the two cup body structures include first standing cotton, first setting yarn, supporting cotton, second setting yarn, second standing cotton, and inner layer cotton.

8. A method of manufacturing an undergarment according to claim 7, wherein, In the step S2, first, place a piece of first standing cotton on the two grooves of the lower mold, then place the first setting yarn on the middle ridge, and place two supporting cottons on the lower parts of the two cup slot respectively; then place the second setting yarn on the lower flange groove, and place two pieces of second standing cotton on the two grooves respectively, and cover the lower mold with a piece of inner layer cotton; finally, press and shape into a composite structure with two cup body structures connected by a one-time hot pressing shaping process.

9. A method of manufacturing an undergarment according to claim 6, wherein, The step S6 includes the following steps: Step S6a: first, cut two large pieces of cloth, one as a surface cloth layer and the other as a skin layer, then brush jelly glue on one of the large pieces of cloth, and then hot press and attach the surface cloth layer and the skin layer along the upper and lower edges to form an upper band and a lower band respectively; Step S6b: cut two small pieces of cloth, brush jelly glue on one of the small pieces of cloth, and then completely attach the two small pieces of cloth to form an elastic strap; Step S6c: then place a pair of positioning side bones on the skin surface of the skin layer, cover the positioning side bones with a positioning cloth piece with glue, and then paste the positioning ear on the positioning cloth piece, and then high-temperature attach and fix the positioning cloth piece and the positioning ear by high-temperature hot pressing process; finally, use a flat car to sew and fix the positioning ear.

10. The method of claim 6, wherein the garment is an undergarment. In the step S8, the secondary shaping treatment includes first high-temperature shaping treatment and first cooling shaping treatment; the first high-temperature shaping treatment refers to hot pressing by a hot pressing device, and the hot pressing time is 30s; the first cooling shaping treatment refers to cold pressing by a cold press, and the cold pressing time is 10s.

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