A method, system, equipment, and terminal for drafting umbrella-shaped crotch cotton thermal underwear.

Abstract

This invention belongs to the field of garment manufacturing technology, and particularly relates to a pattern-making method, system, equipment, and terminal for a cotton long trousers with an umbrella-shaped crotch, including: S1, lateral dimension: based on the structural line analysis of the cotton long trouser pattern, the lateral structural lines mainly include hip circumference, crotch width, mid-leg width, and leg opening width; S2, longitudinal dimension: starting from the structural lines of the cotton long trouser pattern, the longitudinal dimension includes trouser length, front and back waist difference, crotch length, front crotch seam, back crotch seam, umbrella-shaped crotch side length, and crotch extension; S3, three-dimensional shaping: the crotch positioning length is taken as 40% to 55% of the crotch length, thereby determining the range of the crotch position of the umbrella-shaped crotch cotton long trousers; S4, based on the collation of cotton long trouser specifications and dimensions and the comparison of pattern-making methods, the part dimensions and pattern-making methods are comprehensively selected.

Description

Technical Field

[0001] This invention belongs to the field of garment manufacturing technology, and in particular relates to a pattern making method, system, equipment and terminal for umbrella-shaped crotch cotton thermal pants. Background Technology

[0002] Cotton long trousers are a traditional knitted product used as underwear in spring, autumn, and winter. Over decades of production and sales, the shape of their crotch has undergone significant changes. From a swallowtail crotch to a horizontal and vertical thread crotch, and then to an umbrella-shaped crotch, the horizontal dimensions of cotton long trousers have gradually decreased, changing from a loose fit to a close-fitting one, and the size specifications have gradually deviated from the framework of cotton knitted underwear specifications. However, looking at the umbrella-shaped crotch cotton long trousers currently widely used in the market, the small crotch area results in some areas of unsuitable dimensions, even affecting normal wear. Existing cotton long trouser pattern making methods are either too simplistic, with size settings far removed from current cotton long trouser pattern requirements, or too cumbersome, resulting in garment sizes that heavily rely on the pattern maker's personal experience, hindering the exchange and inheritance of cotton long trouser pattern making techniques. Therefore, a pattern making method specifically for umbrella-shaped crotch cotton long trousers is needed to improve existing umbrella-shaped crotch cotton long trouser pattern making techniques.

[0003] Based on the above analysis, the problems and defects of the existing technology are as follows: the existing technology lacks a simple method for drawing patterns for umbrella-shaped crotch cotton long trousers. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a method, system, device, and terminal for drawing the umbrella-shaped crotch of cotton thermal underwear.

[0005] This invention is implemented as follows: a method for drafting an umbrella-shaped crotch cotton thermal underwear, comprising:

[0006] S1, Horizontal Dimension: Based on the structural line analysis of the pattern making of thermal underwear, the horizontal structural lines of the thermal underwear pattern making include the hip circumference, crotch width, mid-leg width, and leg opening width.

[0007] S2, Vertical dimension: Starting from the structural lines of the cotton long trousers pattern, the vertical dimension includes trouser length, front and back waist difference, crotch length, front crotch seam, back crotch seam, umbrella crotch side length, and crotch stretch.

[0008] S3, Three-dimensional design of cotton long trousers: Take 40%~55% of the crotch length as the crotch positioning length to determine the range of the crotch position of the umbrella-shaped crotch cotton long trousers; draw the umbrella-shaped crotch with the crotch positioning point as the intersection point and the side length and crotch extension as reference.

[0009] Furthermore, S2 includes:

[0010] The back crotch seam of thermal underwear can be drawn by a straight line segment connecting points c and f and a straight line segment connecting points f and e; or it can be a smooth arc connecting points c, f and e; the front crotch seam is symmetrical to the back crotch seam with the side seam as the center line.

[0011] Furthermore, S3 includes: dividing the formation of the umbrella-shaped crotch side length into two types: active setting and passive formation. Active setting is when the crotch positioning point h is determined after knowing the crotch side length, and a vertical line hg with a length equal to the crotch side length is directly drawn through the crotch positioning point h. Passive formation is formed by the intersection of the vertical line through the crotch positioning point h and the ef segment on the back lower crotch seam.

[0012] Define a name for the key structural line of the umbrella-shaped crotch. The angle between the extended line hm' connecting the crotch positioning point h to the endpoint of the crossbar and the perpendicular line hg passing through the crotch positioning point h is defined as the side line. The length of the angled side line hg is the side length of the umbrella-shaped crotch, and hm' is the center line of the umbrella-shaped crotch. The length of the center line hm' is the side length of the umbrella-shaped crotch plus the crotch extension; the crotch extension is 0~1.5cm. The fan-shaped or similar fan-shaped structure formed by smoothly connecting m'g yields the umbrella-shaped crotch of the thermal underwear. The umbrella-shaped crotch of the thermal underwear is a folded structure; unfolding it with hm' as the symmetrical line yields the structural pattern of the umbrella-shaped crotch.

[0013] Another object of the present invention is to provide a drafting system for the umbrella-shaped crotch of cotton thermal underwear, comprising:

[0014] Horizontal dimension analysis module: Based on the structural line analysis of the cotton and long underwear pattern, the horizontal structural lines of the cotton and long underwear pattern of this patent include the hip circumference, crotch width, mid-leg width, and leg opening width.

[0015] Vertical dimension analysis module: Starting from the structural lines of the cotton long trousers pattern, the vertical dimension structure includes trouser length, front and back waist difference, crotch length, front crotch seam, back crotch seam, umbrella crotch side length, and crotch stretch.

[0016] 3D Modeling Analysis Module: Using the crotch positioning length as 40%~55% of the straight crotch length, determine the range of the crotch position for the umbrella-shaped crotch cotton long trousers. Using the crotch positioning point as the intersection, and referencing the side length and crotch elongation, draw the umbrella-shaped crotch.

[0017] Comprehensive Drafting Module: Used to comprehensively select the appropriate size and drafting method based on the compilation of cotton long trouser specifications and dimensions and the comparison of drafting methods.

[0018] Another object of the present invention is to provide a computer device, the computer device including a memory and a processor, the memory storing a computer program, which, when executed by the processor, causes the processor to perform the steps of the drawing method for the umbrella-shaped crotch of the cotton long trousers.

[0019] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of the drawing method for the umbrella-shaped crotch of the cotton long trousers.

[0020] Another objective of this invention is to provide an information data processing terminal for implementing the drawing system for the umbrella-shaped crotch of the cotton long trousers.

[0021] Based on the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solution to be protected by this invention are as follows:

[0022] First, the method for determining the positioning point of the interlocking parts in this invention is... Figure 6-1 Optimization of the crotch seam positioning point. The crotch seam positioning point determination method of this invention patent reduces the position of the umbrella-shaped crotch seam of the thermal underwear. Experiments show that this positioning makes the thermal underwear fit better.

[0023] This invention uses the crotch positioning point as the center or intersection point, and the extended line hm' of the line connecting the crotch positioning point to the end point of the crossbar line and the perpendicular line hg passing through the crotch positioning point as the included side line, smoothly connecting the fan-shaped or similar fan-shaped structure m'g to obtain the umbrella-shaped crotch of cotton trousers. The pattern making method is simple, the dimensions are clear, and the method of drawing the umbrella-shaped crotch of cotton trousers is simplified.

[0024] Secondly, this invention optimizes the positioning points of the umbrella-shaped crotch of thermal underwear and creates a new method for drawing the umbrella-shaped crotch of thermal underwear. The pattern-making method is more scientific and simpler than existing methods, resulting in a simpler pattern for thermal underwear.

[0025] Third, as supporting evidence of the inventiveness of this invention, it is also reflected in the following two important aspects:

[0026] (1) The expected benefits and commercial value of the technical solution of this invention after transformation are as follows:

[0027] The method for making the umbrella-shaped crotch pattern of cotton long trousers in this invention is scientific and reasonable, simple to operate, and has low dependence on the experience of the pattern maker. It has good applicability to the automated generation method of the pattern of umbrella-shaped crotch cotton long trousers.

[0028] (2) The technical solution of this invention fills a technical gap in the industry both domestically and internationally:

[0029] Currently, the pattern-making methods for the umbrella-shaped crotch of thermal underwear present two extremes. One extreme is overly complex, with cumbersome pattern-making at key positions and unclear pattern data for some critical areas, heavily relying on the professional skills of the pattern maker, resulting in numerous sizing issues in thermal underwear products on the market. The other extreme is overly simplistic pattern-making methods, leading to sizes that are too large and resulting in poor fit for thermal underwear. This invention creates a new pattern-making method for the umbrella-shaped crotch of thermal underwear, optimizing the position of the umbrella-shaped crotch positioning points, and providing a simple and scientific method for pattern-making the umbrella-shaped crotch of thermal underwear.

[0030] Fourth, the significant technological advancements brought about by the drafting method, system, equipment, and terminal for the umbrella-shaped crotch of cotton thermal pants provided by this invention are mainly reflected in the following aspects:

[0031] 1) Improved Precision of Personalized Customization: Traditional thermal underwear designs are often based on standardized sizes, making it difficult to meet the needs of customers with special body types or specific requirements. This invention, through detailed horizontal and vertical dimensional analysis, allows designers to customize thermal underwear according to each individual's specific size and preferences, significantly improving the precision of personalized customization and customer satisfaction.

[0032] 2) Increased production efficiency: Automated drafting systems can quickly generate design drawings based on different dimensional parameters, reducing the time and errors associated with manual drafting. This increased automation directly improves production efficiency and the speed of design-to-production conversion.

[0033] 3) Optimized 3D Design: The umbrella-shaped crotch design enhances the comfort and aesthetics of the trousers. The 3D design analysis module provides diverse design solutions for different activity needs and preferences, improving the market competitiveness of the final product.

[0034] 4) Cost control and resource optimization: Accurate pattern making can reduce fabric waste, and production costs can be lowered by optimizing cutting paths and splicing methods. At the same time, optimized design for mass production can effectively control inventory and reduce overproduction while ensuring quality.

[0035] 5) Sustainable development: During the design process, it is possible to better adapt to different environmental and resource changes, such as adjusting the design to adapt to changes in fabrics or supply conditions, which helps to achieve sustainable production.

[0036] 6) Market Response Speed: By quickly adjusting design parameters to adapt to changes in market trends or consumer feedback, companies can launch new products more quickly and improve market response speed.

[0037] This invention significantly improves the technical level of clothing design and production by providing accurate, efficient and flexible design and drafting methods and systems, while also having a positive impact on market demand responsiveness, cost control, user experience and sustainable development. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a flowchart of the drafting method for the umbrella-shaped crotch of cotton long trousers provided in an embodiment of the present invention;

[0040] Figure 2 This is a structural diagram of the drafting system for the umbrella-shaped crotch of cotton thermal pants provided in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the structural lines of the cotton long trousers provided in an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of key parts of the cotton long trousers provided in an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram illustrating the principle and structural line names of the radius circle of the umbrella-shaped crotch cotton wool pants provided in this embodiment of the invention;

[0044] Figure 6-1 , 6-2 Figures 6-3 are comparative diagrams of the drafting methods provided in the embodiments of the present invention;

[0045] Figure 7 This is an example of a structural drawing for an umbrella-shaped crotch cotton thermal underwear provided in an embodiment of the present invention.

[0046] Figure 8 This is a picture showing the wearing effect of cotton long trousers provided in an embodiment of the present invention;

[0047] Figure 9 This is a diagram showing the back of the cotton long trousers worn according to an embodiment of the present invention;

[0048] Figure 10 This is a schematic diagram of a subjective fitting evaluation experiment provided in an embodiment of the present invention; wherein, (a) standing, (b) sitting upright, (c) standing with legs crossed, (d) squatting, and (e) standing upright with right leg raised 90 degrees. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0050] Example 1: Personalized Cotton Long Pants Design

[0051] Suppose a customer needs to customize a pair of thermal underwear, and the customer's body shape and preferences differ significantly from the standard sizes available on the market.

[0052] 1) Needs Analysis: We conduct a detailed analysis based on the customer's specific measurement data, including hip circumference, waist circumference, thigh circumference, and pant length, combined with the customer's personal preference for the looseness of the pants.

[0053] 2) Design scheme:

[0054] Horizontal dimension: Determine the hip width based on the customer's hip circumference, and set the mid-thigh width and hem width with reference to the customer's preference for thigh circumference and leg opening width.

[0055] Vertical dimension: The pant length is determined according to the customer's waist to ankle length. Taking into account the customer's habit of wearing high-waisted or low-waisted pants, the front and back waist difference is adjusted.

[0056] Three-dimensional design: For customers who specifically request a high degree of freedom of movement, the crotch positioning length can be set at 50% of the straight crotch, giving the crotch more elongation and ensuring comfort in the crotch area during activities.

[0057] 3) Implementation plan:

[0058] Use CAD software to input all measurement and design parameters.

[0059] The software automatically generates a pattern for thermal underwear based on the input parameters, paying special attention to the shape of the umbrella-shaped crotch.

[0060] The generated design drawings are adjusted in detail, and after confirmation that they are correct, the drawings are output and handed over to the production department for cutting and sewing.

[0061] Example 2: Mass Production Optimization Design

[0062] A clothing company wants to optimize the design of its mass-produced thermal underwear to improve comfort and reduce production costs.

[0063] 1) Market Analysis: Analyze the popular styles of cotton long trousers on the market and collect statistical information on the body shape of the target consumer group.

[0064] 2) Design scheme:

[0065] Lateral dimension: Based on market analysis results, several standardized hip circumference sizes were developed, along with corresponding crotch and leg opening widths.

[0066] Vertical dimension: Multiple pant length options are provided to accommodate consumers of different heights, while the front and back waist difference and crotch length are standardized.

[0067] Three-dimensional design: Several different umbrella-shaped three-dimensional designs are designed for the main target consumer group to meet the needs of different activities.

[0068] 3) Implementation plan:

[0069] Develop an automated drafting system that can automatically draw the basic style of thermal underwear based on the input horizontal and vertical dimension parameters.

[0070] For the umbrella-shaped crotch design, the system can automatically adjust the crotch positioning length and crotch elongation based on preset standards and body shape data.

[0071] Small-batch trial production is carried out using design drawings generated by the system, and style optimization is carried out based on market feedback.

[0072] Several of the most popular designs were finally selected and put into mass production.

[0073] The two embodiments above demonstrate how to apply the drafting method and system for the umbrella-shaped crotch of cotton long trousers provided by this invention to design and produce under two different scenarios: personalized customization and mass production optimization.

[0074] The drafting method and system for the umbrella-shaped crotch of thermal underwear provided by this invention is an improvement on existing thermal underwear designs. This method and system, through dimensional analysis of key parts of the thermal underwear, calculation of the three-dimensional structural shape, and the application of comprehensive drafting techniques, aims to improve the accuracy, comfort, and production efficiency of thermal underwear design. The working principle of this technical solution is described in detail below:

[0075] S1: Horizontal Dimension Analysis

[0076] 1) Hip circumference: This is a key dimension for determining the width of pants and affects the overall comfort of the pants.

[0077] 2) Crotch: This relates to the fit of the crotch; if it is too narrow or too wide, it will affect the wearing experience.

[0078] 3) Mid-thigh width: directly related to the freedom of movement of the legs.

[0079] 4) Wide leg opening: Affects the tightness and appearance of the trouser legs.

[0080] S2: Vertical Dimensional Analysis

[0081] 1) Pants length: The straight-line distance from the waist to the hem, which determines the overall length of the pants.

[0082] 2) Front and back waist difference: The front waist is lower than the back waist to ensure that the front of the pants fits well while the back covers the buttocks.

[0083] 3) Crotch length: This affects the height of the crotch and directly relates to comfort.

[0084] 4) Front and back crotch seams: The length of the seam in the crotch area needs to match the crotch length.

[0085] 5) Umbrella-shaped crotch side length: determines the width of the crotch area of ​​the pants, which directly affects the freedom of movement and comfort when wearing them.

[0086] 6) Crotch extension: Used to adjust the size and shape of the crotch, providing extra space for the crotch.

[0087] S3: Three-Dimensional Modeling Analysis

[0088] 1) Crotch positioning length: Take a certain percentage of the straight crotch. This percentage range (40%~55%) is used to determine the range of the crotch position of the umbrella-shaped crotch cotton long trousers to ensure the comfort and appearance of the crotch when wearing them.

[0089] 2) Umbrella-shaped crotch design: Using the crotch positioning point as the intersection point, draw the shape of the umbrella-shaped crotch with reference to the side length of the umbrella-shaped crotch and the elongation of the crotch. This design can provide more space and reduce the restriction of movement.

[0090] S4: Integrated Cartography Module

[0091] By compiling the specifications and dimensions of thermal underwear and comparing them with existing drafting methods, the most suitable dimensions and drafting method for each part are selected. This step ensures that the designed pants are not only theoretically sound but also feasible in actual production, meeting the needs of consumers with different body types.

[0092] A cartographic system corresponding to the above steps typically includes the following modules:

[0093] 1) Horizontal dimension analysis module: Automatically analyzes the horizontal dimension data of the pants.

[0094] 2) Vertical dimension analysis module: Automatically analyzes the vertical dimension data of the pants.

[0095] 3) 3D modeling analysis module: Automatically calculates the positioning length of the crotch and draws the umbrella-shaped crotch.

[0096] 4) Integrated drawing module: Integrates the previous data and analysis to automatically generate the final design drawing of the pants.

[0097] To address the problems existing in the prior art, the present invention provides a method, system, device, and terminal for drawing an umbrella-shaped crotch for cotton thermal pants. The present invention will be described in detail below with reference to the accompanying drawings.

[0098] like Figure 1 As shown, the drafting method for the umbrella-shaped crotch of cotton long trousers provided in this embodiment of the invention includes:

[0099] S1, Horizontal Dimension: Based on the structural line analysis of the cotton trouser pattern, the horizontal structural lines of the cotton trouser pattern of this patent are mainly the hip circumference, crotch width, mid-leg width, and leg opening width.

[0100] S2, Vertical Dimension: Starting from the structural lines of the cotton long trousers pattern, the vertical dimension includes trouser length, front and back waist difference, crotch length, front crotch seam, back crotch seam, umbrella crotch side length, and crotch stretch.

[0101] S3, Three-dimensional design of thermal underwear: The crotch length is taken as 40%~55% of the straight crotch length to determine the range of the crotch position of the umbrella-shaped crotch thermal underwear. The umbrella-shaped crotch is drawn with the crotch positioning point as the intersection point and the side length and crotch extension as references.

[0102] like Figure 2 As shown, the drafting system for the umbrella-shaped crotch of cotton long trousers provided in this embodiment of the invention includes:

[0103] Horizontal dimension analysis module: Based on the structural line analysis of the cotton and long underwear pattern, the horizontal structural lines of the cotton and long underwear pattern of this patent are mainly the hip circumference, crotch width, mid-leg width, and leg opening width.

[0104] Vertical dimension analysis module: Starting from the structural lines of the cotton long trousers pattern, the vertical dimension structure includes trouser length, front and back waist difference, crotch length, front crotch seam, back crotch seam, umbrella crotch side length, and crotch stretch.

[0105] 3D Modeling Analysis Module: Using the crotch positioning length as 40%~55% of the straight crotch length, determine the range of the crotch position for the umbrella-shaped crotch cotton long trousers. Using the crotch positioning point as the intersection, and referencing the side length and crotch elongation, draw the umbrella-shaped crotch.

[0106] Comprehensive Drafting Module: Used to comprehensively select the appropriate size and drafting method based on the compilation of cotton long trouser specifications and dimensions and the comparison of drafting methods.

[0107] like Figure 3 As shown, the pattern making of this umbrella-shaped crotch cotton long trousers is divided into two parts: the pattern making of the trouser body and the pattern making of the umbrella-shaped crotch. The main focus of this invention is on the umbrella-shaped crotch part of the cotton long trousers.

[0108] Trial production of umbrella-shaped crotch cotton thermal pants pattern and determination of pattern making scheme:

[0109] like Figure 4 , Figure 5 , Figure 7 As shown, the drawing method is as follows: First, draw a vertical line. Take points o, o', and o'' on the vertical line, such that oo' = trouser length and oo'' = 1 / 4 of the front-to-back waist difference. Pass through the vertical line... Draw a horizontal line ab from point o on the top, such that oa = ob = hip circumference / 4. Draw a vertical line through point a. On the vertical line Take a point a' upwards, such that aa' = 1 / 4 of the difference between the front and back sides. Draw a perpendicular line through point b. On the vertical line Take a point b' from top to bottom, such that bb' = 3 / 4 of the difference between the front and back waists. On the vertical line Draw a vertical line on one side Make the vertical line and vertical lines The distance between them is equal to the crossbar dimension. Draw an arc with a' as the center and the crossbar dimension as the radius, intersecting the perpendicular line. At point e. Draw a horizontal line through point e. Horizontal line Intersecting perpendicular lines At e', on the horizontal line Draw a horizontal line below Make the horizontal line and horizontal line The distance between them is 8-10cm (8cm for children, 10cm for adults). On the vertical line Draw a vertical line on one side Make the vertical line and vertical lines The horizontal distance between them is the width of the middle leg, and the vertical line is... and horizontal line The intersection is at point f. Draw a horizontal line cc' through point o', intersecting the vertical line... Take co' = leg opening width on one side, on the vertical line Take c'o' = hem width on one side, connect cf and fe, cf and fe form the back crotch seam of the thermal underwear, fe and the vertical line Intersecting at point g. Using the endpoint e of the crossbar as the center, draw a circle with a radius equal to 40% to 55% of the crotch positioning length. This circle intersects with the vertical line... The intersection point is the positioning point h for the umbrella-shaped crotch seam, which determines the position of the umbrella-shaped crotch seam of the thermal underwear. Using point h as the center and the length of the umbrella-shaped crotch edge as the radius, draw an arc. This arc intersects the back crotch seam of the thermal underwear at point g, and intersects the extension of line he at point m. Take a point m' on the extension of line hm, where mm' = 0–1.5 cm. Smoothly connect gm'. Using hm' as the axis of symmetry, symmetrically unfold hg and m'g to obtain the umbrella-shaped crotch of the thermal underwear. hg is the edge line of the umbrella-shaped crotch, and hm' is the center line of the umbrella-shaped crotch. Using oo' as the axis of symmetry, symmetrically unfold point g as g' and point f as f'. Connect the three line segments b'g', g'f', and f'c'. a'b', b'g', g'f', f'c', cc', cf, fg, and ga' constitute the main body pattern of the thermal underwear.

[0110] An application embodiment of the present invention provides a computer device, which includes a memory and a processor. The memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of a method for drawing the umbrella-shaped crotch of cotton long trousers.

[0111] An application embodiment of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of a method for drawing the umbrella-shaped crotch of cotton long trousers.

[0112] An application embodiment of the present invention provides an information data processing terminal, which is used to implement a drawing system for the umbrella-shaped crotch of cotton long trousers.

[0113] The application and implementation of the present invention are illustrated by conducting a wearing experiment using the method of the present invention and the commonly used fabric for cotton long underwear.

[0114] Using the pattern-making method of this invention, combined with national standards GB / T 6411-1997, GB / T 6411-2008 and literature, the specifications and dimensions in Table 1 are used to make the pattern for cotton long trousers.

[0115] Table 1. Specifications and dimensions of sample pants used in application examples.

[0116]

[0117] like Figure 10 As shown, the scientific validity of the invention method was verified using a subjective fitting evaluation experiment. The evaluation team consisted of six women aged 20-25, approximately 160cm tall, with a waist circumference of 68cm and a hip circumference of 84cm. The subjective evaluation experiment included standing, sitting upright, sitting with legs crossed, squatting, and standing upright with the right leg raised 90 degrees. The posture and evaluation requirements for each movement were as follows:

[0118] (a) Standing: Chest out, head up, legs naturally apart, parallel and shoulder-width apart, about 20cm apart, arms hanging down naturally, feel and observe the fit and aesthetics of the clothing around the crotch.

[0119] (b) Sitting upright: The upper body, thighs and calves, and calves and the ground are all at right angles. The knees and feet should be naturally spread about 20cm apart. The hands are naturally placed on the middle of the thighs. Feel and observe the comfort and aesthetics of the groin area.

[0120] (c) Sitting with legs crossed: In a natural sitting posture, cross your right leg over your left leg and place your hands on your knees, feeling the comfort and aesthetics of your groin area when it is crossed.

[0121] (d) Squatting: With the right foot in front and the left foot behind, squat down with both legs, the front foot fully on the ground and the lower leg basically perpendicular to the ground, the heel of the back foot raised and the toes on the ground, close to the legs, and the hands placed on the knees. Observe the tightness, comfort and aesthetics of the groin when it is spread.

[0122] (e) Standing with right leg raised 90 degrees: Stand naturally, raise your right leg so that your thigh is parallel to the ground and your lower leg is at a 90-degree angle to your thigh. Let your hands hang down naturally and observe the tightness, comfort and aesthetics of your groin when it is open.

[0123] The specific parameters of the fabric used in the experiment are shown in Table 2.

[0124] Table 2. Information on fabrics used in application examples.

[0125]

[0126] To quantify the experimental data, this fitting experiment used a psychological scale method for scoring the evaluation results. Participants rated the clothing based on their experience during various movements. Observers' evaluations were peer-reviewed, primarily assessing the aesthetics and fit of the thermal underwear during different actions. The numbers 1 to 10 represent very uncomfortable, extremely uncomfortable, uncomfortable, slightly uncomfortable, somewhat uncomfortable, somewhat comfortable, slightly uncomfortable, comfortable, very comfortable, and extremely comfortable, respectively.

[0127]

[0128] Table 3 presents the evaluation results of the wearing experiment. The data in Table 3 are the average evaluations from six participants (accurate to two decimal places). One participant's wearing experience is shown in the attached image. Figure 8 , Figure 9 .

[0129] Experimental results show that the cotton trousers pattern made using this drafting method has excellent comfort and crotch fit.

[0130] There aren't many methods for drafting patterns for thermal underwear. Figure 6 compares and illustrates existing methods for drafting patterns for thermal underwear with an umbrella-shaped crotch. Generally speaking, there are two methods for determining the crotch positioning point of thermal underwear: one is to draw an arc with point e as the center and 60% of the crotch width as the radius, and this arc intersects with the vertical line... The intersection point is the positioning point, see Figure 6-1 One type is on the vertical line. Take a'h = 11cm directly (see above) Figure 6-2 ) or a'h = 1 / 3 to 1 / 2 a'e' (see Figure 6-3 Both methods can easily lead to the crotch seam positioning point of the thermal underwear being too high, affecting the overall appearance of the thermal underwear. The overall length of the umbrella-shaped crotch can also be too large, causing the crotch to drop.

[0131] In current pattern-making methods for the umbrella-shaped crotch of cotton long trousers, one method involves drawing a perpendicular line (en) with ef as the symmetrical line. At point n, make ∠m'ef = ∠nef and em' = en. Smoothly connect gm' and symmetrically expand hg and gm' using hm' to obtain the umbrella-shaped crotch. This drafting method heavily relies on the position of the ef line in the draft. If the size of em' is too small, it can lead to deformation of the umbrella-shaped crotch pattern or make it too small, which is detrimental to the automated production process of the umbrella-shaped crotch. See [link to drafting method] for details. Figure 6-1 One drafting method involves directly specifying the length of the umbrella-shaped crotch edge and other dimensions for direct drafting. See [link to drafting method] for details. Figure 6-2 One drafting method is to extend he, connect hg, draw an arc with g as the center intersecting the extension of he at m', such that e'g = m'g, and then symmetrically expand hg and hm' to obtain the umbrella-shaped crotch. This drafting method easily leads to the umbrella-shaped crotch centerline hm' being too large in the pattern, causing excess fabric to accumulate at the crotch of the cotton trousers, resulting in discomfort when worn. For detailed drafting methods, see [link to drafting method]. Figure 6-3 .

[0132] The table below is Figure 6-1 , 6-2 6-3 Comparison of drafting methods.

[0133] Table 4 Comparison of Existing Cartographic Methods

[0134]

[0135] A comparison of pattern-making methods shows that the invention of this cotton long trousers pattern-making scheme has significant advantages.

[0136] It should be noted that embodiments of the present invention can be implemented in hardware, software, or a combination of both. The hardware portion can be implemented using dedicated logic; the software portion can be stored in memory and executed by a suitable instruction execution system, such as a microprocessor or dedicated-design hardware. Those skilled in the art will understand that the above-described devices and methods can be implemented using computer-executable instructions and / or included in processor control code, for example, such code provided on a carrier medium such as a disk, CD, or DVD-ROM, a programmable memory such as read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The devices and modules of the present invention can be implemented by hardware circuitry such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field-programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of the above-described hardware circuitry and software, such as firmware.

[0137] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for drafting a pattern for an umbrella-shaped crotch on cotton thermal underwear, characterized in that, include: S1, Horizontal Dimension: Based on the structural line analysis of the pattern making of thermal underwear, the horizontal structural lines of the thermal underwear pattern making include the hip circumference, crotch width, mid-leg width, and leg opening width. S2, Vertical dimension: Starting from the structural lines of the cotton long trousers pattern, the vertical dimension includes trouser length, front and back waist difference, crotch length, front crotch seam, back crotch seam, umbrella crotch side length, and crotch stretch. S3, three-dimensional structure of cotton long trousers: the crotch length is taken as 40%~55% of the straight crotch length to determine the range of the crotch position of the umbrella-shaped crotch cotton long trousers. The umbrella-shaped crotch is drawn with the crotch positioning point as the intersection point and the side length of the umbrella-shaped crotch and the crotch extension as references. S2 includes: drawing a vertical line ①, and taking points o, o', and o" on the vertical line, such that oo' = trouser length and oo" = 1 / 4 of the front-to-back waist difference; drawing a horizontal line ab through point o on vertical line ①, such that oa = ob = hip circumference / 4; drawing a vertical line ② through point a, and taking a point a' upward on vertical line ②, such that aa' = 1 / 4 of the front-to-back waist difference; drawing a vertical line ③ through point b, and taking a point b' downward on vertical line ③, such that bb' = 3 / 4 of the front-to-back waist difference; drawing a vertical line ④ on one side of vertical line ②, such that the distance between vertical line ④ and vertical line ① is equal to the crotch measurement; With a' as the center and the crotch width as the radius, draw an arc intersecting vertical line ④ at point e; draw a horizontal line ⑥ through point e, intersecting vertical line ② at e'; draw a horizontal line ⑦ below horizontal line ⑥, making the distance between horizontal line ⑥ and horizontal line ⑦ 8~10cm; draw a vertical line ⑤ on one side of vertical line ④, making the horizontal distance between vertical line ⑤ and vertical line ① the mid-leg width, and vertical line ⑤ and horizontal line ⑦ intersect at point f; draw a horizontal line cc' through point o', and on one side of vertical line ②, take co' = leg opening width to determine point c; Draw the front and back crotch seams: The back crotch seam of the cotton trousers is formed by a straight line segment connecting points c and f and a straight line segment connecting points f and e; or it is formed by a smooth arc connecting points c, f and e; the front crotch seam is symmetrical to the back crotch seam with the side seam as the center line. S3 includes: Determining the crotch positioning point h: With the end point e of the horizontal crotch line as the center, draw a circle with a radius of 40% to 55% of the crotch positioning length. The intersection of this circle and the vertical line ② is the crotch positioning point h. The formation of the umbrella-shaped crotch side length is divided into two types: active setting and passive formation. Active setting is when the crotch positioning point h is determined after knowing the crotch side length, and a vertical line with a length equal to the crotch side length is drawn directly through the crotch positioning point h. Passive formation is formed by the intersection of the vertical line through the crotch positioning point h and the ef segment on the back lower crotch seam. The key structural lines of the umbrella-shaped crotch are defined as follows: the extended line hm' of the line connecting the crotch positioning point h to the endpoint e of the cross crotch line and the perpendicular line hg passing through the crotch positioning point h are used as the included side lines. The length of the included side line hg is the side length of the umbrella-shaped crotch, and hm' is the center line of the umbrella-shaped crotch. The length of the center line hm' is the side length of the umbrella-shaped crotch plus the crotch extension. The crotch extension is 0~1.5cm. The fan-shaped structure formed by smoothly connecting m'g is used to make the umbrella-shaped crotch of the cotton trousers. The umbrella-shaped crotch of the cotton trousers is a folded structure. By unfolding it with hm' as the symmetrical line, the structural pattern of the umbrella-shaped crotch can be obtained.

2. A computer device comprising a memory and a processor, the memory storing a computer program, which, when executed by the processor, causes the processor to perform the steps of the drawing method for the umbrella-shaped crotch of cotton trousers as described in claim 1.

3. A computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of the drawing method for the umbrella-shaped crotch of cotton long trousers as described in claim 1.

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