Method for 3D printing of customized pillow based on human body three-dimensional model

Abstract

The application belongs to the technical field of customized pillows and specifically discloses a method for printing a customized pillow for lateral lying based on a three-dimensional model of a human body, which comprises a customized pillow evaluation process: obtaining three-dimensional image data of a head, neck and chest of a human body when standing, obtaining human body size data, obtaining a head weight value in a neutral position, and testing a head subarea pressure; a customized pillow design process: calculating a height of a pillow skeleton, designing a shape of the pillow skeleton, and obtaining a hardness of a memory cotton layer; printing the pillow skeleton and customizing the memory cotton layer; and assembling the memory cotton layer, the pillow skeleton and a pillowcase. The method breaks through the limitation of traditional data that only relies on a single cervical curvature, combines human body size data, subarea pressure and head weight to design a customized pillow, and makes the customized pillow more in line with ergonomics.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of customized pillows, and particularly relates to a method for printing a customized pillow for lateral lying based on a three-dimensional model of a human body. BACKGROUND

[0002] Sleeping position and pillow adaptability are core factors affecting sleep quality: ① Compared with supine position, lateral lying can significantly improve respiratory patency (reduce snoring and apnea) and reduce cardiovascular event risk. ② Anatomical differences: the human cervical spine curvature, thoracic spine curvature, shoulder width and head width differ significantly, and the pillow height needs to be matched when lying on the side, otherwise it will cause neck muscle imbalance (inducing fallen pillow, cervical spondylosis) or airway folding (affecting breathing). ③ Lack of dynamic adaptation: traditional pillows mainly rely on material innovation (such as memory foam layer, latex) or uniform height design, and cannot dynamically adapt to individual needs of different body types and sleeping positions. ④ Existing 3D printed customized pillows mainly focus on static support structure (such as physiological curvature fit of neck pillow), lack of mechanical analysis of lateral lying position, and do not integrate respiratory passage design, which cannot systematically solve sleep disorders.

[0003] For example, the invention patent application with publication number CN109454875A obtains a 3D printed pillow customized for user's neck and shoulder contour through three-dimensional scanning, but only relies on anatomical shape scanning and cannot completely adapt by integrating biomechanical parameters (such as head weight, shoulder and neck pressure distribution). SUMMARY

[0004] The purpose of the present application is to provide a method for printing a customized pillow for lateral lying based on a three-dimensional model of a human body, which realizes three-dimensional dynamic alignment of the head-neck-thoracic spine, so that the cervical spine is in a neutral position that conforms to the natural curvature of the human body; on the basis of this physiological alignment, the bilateral shoulder and neck muscle groups can achieve a state of mechanical balance, avoiding the risk of fallen pillow caused by unilateral muscle tension abnormality; at the same time, the neutral position accurately maintains the maximum patency of the airway, effectively eliminating the airway folding phenomenon caused by inappropriate pillow height.

[0005] In order to achieve the above purpose, the technical scheme of the present application is as follows: a method for printing a customized pillow for lateral lying based on a three-dimensional model of a human body, comprising

[0006] S1: Customized pillow evaluation process:

[0007] S1.1: Obtain three-dimensional image data of the head, neck and chest of the human body when standing;

[0008] S1.2: Obtain human body size data: obtain human body size data from the three-dimensional image data, the human body size data including shoulder width, head width, zygomatic width, mandible length, head length, and head circumference;

[0009] S1.3: Obtain the neutral position head weight value: the tester lies on the head weight measurement device, which can be raised and record the head weight in real time; the head weight measurement device measures the head weight corresponding to different heights of the pillow, and plots the dynamic curve of the head weight with the change of the pillow height when lying on the side, and obtains the neutral position head weight value by dynamic fitting calculation Hneutral ; the change relationship between the head weight and the pillow height is W=f*H, wherein H is the height of the pillow, the unit is centimeter, the measurement range H∈[H min , H max ], wherein H min is the lowest height, H max is the highest height; W is the head weight, the unit is kilogram; the neutral position head weight value Hneutral corresponds to the initial optimal pillow height, at this time the head, neck and thoracic vertebrae are aligned;

[0010] S1.4: Test the head subarea pressure: test the pressure distribution of the head six subareas when lying on the side according to the initial optimal pillow height and the combined state of the base memory foam layer; the head is divided into six subareas, which are frontal area, occipital area, frontal zygomatic complex area, periauricular area, mandibular area and posterior cervical area;

[0011] S2: Design the custom pillow process: the custom pillow includes a pillow skeleton, a memory foam layer and a pillowcase, the pillow skeleton and the memory foam layer are assembled in the pillowcase; the pillow skeleton includes a support assembly and a beam body assembly, the support assembly is located below the beam body assembly and is used for supporting the beam body assembly; the support assembly includes two groups of support structures arranged side by side, each group of support structures includes a base and a plurality of support columns, and a plurality of support columns are fixed on the base; the beam body assembly includes a front crossbeam, a rear crossbeam and two groups of side beams, the front crossbeam, the rear crossbeam and the two groups of side beams form a rectangular frame structure, and the support columns are used for supporting the two groups of side beams; a plurality of longitudinal support strips are arranged between the front crossbeam and the rear crossbeam, and the longitudinal support strips are arc-shaped structures; a first angle is formed between the front crossbeam and the horizontal plane, and a second angle is formed between the rear crossbeam and the horizontal plane; the side of the front crossbeam and the rear crossbeam away from each other is inclined upward; the memory foam layer is installed on the rectangular frame structure;

[0012] S2.1: Calculate the height of the pillow skeleton: calculate multi-dimensional human body parameters according to human body size data, and calculate the height of the pillow skeleton according to the multi-dimensional human body parameters; the multi-dimensional human body parameters include the difference between shoulder width and head width, head width, zygomatic width, the difference between head width and zygomatic width, and the angle between zygomatic and mandibular; the difference between shoulder width and head width can obtain the optimal height of the pillow skeleton; the head width, the zygomatic width and the difference between the head width and the zygomatic width can determine the transverse support range of the pillow skeleton, which is the distance between the front crossbeam and the rear crossbeam; the angle between the zygomatic and the mandibular can determine the first angle of the front crossbeam;

[0013] S2.2: Design the shape of the pillow frame: based on 3D image data and measured head weight in a neutral position while lying on the side. Hneutral The design includes the length and width of the front and rear crossbeams, the first angle, the second angle, the number of longitudinal support bars, and the degree of concave curvature of the longitudinal support bars, as well as the pressure distribution in the six zones of the head.

[0014] S2.3: Obtain the hardness of the memory foam layer: Based on the pre-established memory foam layer library, find the correspondence between head weight and the degree of memory foam sinking to determine the hardness of the memory foam layer; adjust the hardness of the memory foam layer in the corresponding area according to the pressure distribution of the six zones of the head.

[0015] S3: Integrate customized parameters, create a 3D model of the pillow frame, and complete the printing; customize the memory foam layer according to the hardness requirements of the memory foam layer in each position and the shape and size of the pillow frame;

[0016] S4: Complete the assembly of the memory foam layer, pillow frame, and pillowcase.

[0017] Furthermore, in step S1.1, three-dimensional image data of the head, neck, and chest of a human body when standing is obtained; specifically, a three-dimensional human body model of the head, neck, and chest is obtained by scanning with a three-dimensional human body scanner or by taking three-dimensional radiographic images of the head, neck, and chest using a device.

[0018] Furthermore, in step S1.2, a recognition processing module is used to obtain human body size data. The recognition processing module has undergone deep learning in advance. The recognition processing module can automatically identify feature points and their lengths and angles, and calculate human body size data. Feature points include the head, cervical spine, shoulders, temporal bone, cheekbone, and mandible.

[0019] Furthermore, in step S1.4, the pressure distribution of the six head zones is represented by a pressure heatmap.

[0020] Furthermore, in step S2.2, the shape of the pillow frame is designed based on three-dimensional data and the measured head weight in a neutral position when lying on one's side. Hneutral The design of the pressure distribution in the six head zones includes the length and width of the front and rear crossbeams, the first angle, the second angle, the number and width of the longitudinal support bars, and the degree of concave curvature.

[0021] If the subject's head weight is greater than that of 75% of the population, increase the number of longitudinal support strips to the standard number and decrease the degree of concavity of the longitudinal support strips to the standard degree of concavity; if the subject's head weight is less than that of 25% of the population, decrease the number of longitudinal support strips to the standard number and increase the degree of concavity of the longitudinal support strips to the standard degree of concavity; the number of longitudinal support strips is 3-6 sets, with a standard number of 4 sets; the degree of concavity of the longitudinal support strips ranges from 0-20mm, where 0 represents a straight longitudinal support strip with no concavity; a concavity of 20mm represents a concavity height of 20mm; the standard degree of concavity is 10mm.

[0022] The frontal region is supported by the anterior crossbeam, and the posterior region is supported by the posterior crossbeam. If the strongest dark red area appears when pressure is measured in the frontal and posterior regions, it indicates that the pressure distribution is too large, and a second angle needs to be added.

[0023] Vertical support strips are designed to support the forehead-zygomatic complex area and the periauricular area. If the strongest dark red area appears during the detection of the forehead-zygomatic complex area and the periauricular area, it indicates that the pressure distribution is too large. In this case, the number of vertical support strips needs to be reduced and the degree of arc concavity needs to be increased.

[0024] The mandibular region and the posterior neck region are supported by the anterior crossbeam; if the strongest dark red area appears during the examination of the mandibular region and the posterior neck region, it indicates that the pressure distribution is too large, and a second angle needs to be added;

[0025] If the length of the mandible is less than that of 75% of the population or the head circumference is less than that of 75% of the population, then the first angle needs to be reduced and the distance between the anterior and posterior crossbeams needs to be reduced.

[0026] The distance between the front and back crossbeams is adjusted according to the ratio of the forehead-zygomatic complex area and the head length of the subject.

[0027] Furthermore, the first angle is 0°-30°.

[0028] Furthermore, in step S1.3, the inflection point that appears after the stable segment of the dynamic curve is the neutral head weight value. Hneutral .

[0029] The beneficial effects of this technical solution are as follows:

[0030] Achieving three-dimensional dynamic alignment of the head, neck, and thoracic spine places the cervical spine in a neutral position that conforms to the natural curvature of the human body. Based on this physiological alignment, the shoulder and neck muscle groups on both sides can achieve a state of biomechanical balance, avoiding the risk of stiff neck caused by abnormal muscle tension on one side. At the same time, the neutral position precisely maintains the maximum airway patency, effectively eliminating airway folding caused by unsuitable pillow height. Ultimately, through the triple synergistic effect of optimized spinal alignment, muscle balance, and airway patency, it systematically reduces snoring and sleep apnea events, improves respiratory ventilation efficiency, and fundamentally improves sleep quality.

[0031] Breaking away from the limitations of traditional methods that rely solely on data about the curvature of the cervical spine, this product combines human body size data, zoned pressure, and head weight to design a custom pillow, making it more ergonomic. Attached Figure Description

[0032] Figure 1 This is a flowchart of the method for 3D printing a custom pillow for side-lying positions based on a three-dimensional human body model according to the present invention;

[0033] Figure 2 A 3D model for a custom-made pillow;

[0034] Figure 3 for Figure 2 The main view;

[0035] Figure 4 for Figure 2 A schematic diagram of the pillow frame structure;

[0036] Figure 5 for Figure 2 A schematic diagram of the structure of the memory foam layer;

[0037] Figure 6 This is a partition diagram of the head six partitions;

[0038] Figure 7 This is a schematic diagram showing the alignment of the head, neck, and chest.

[0039] Figure 8 This is a dynamic curve showing how head weight changes with pillow height.

[0040] Figure 9 This is a pressure heatmap. Detailed Implementation

[0041] The following detailed description illustrates the specific implementation method:

[0042] The reference numerals in the accompanying drawings include: memory foam layer 1, support assembly 2, beam assembly 3, base 4, support column 5, rear crossbeam 6, front crossbeam 7, side beam 8, and longitudinal support bar 9.

[0043] 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 some embodiments of the present invention, and not all embodiments. 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.

[0044] The basic implementation examples are as follows: Figures 1-9 As shown: A method for 3D printing a custom pillow for side-lying positions based on a 3D human body model, such as... Figure 1 As shown, it includes the following steps:

[0045] S1: Custom Pillow Evaluation Process:

[0046] S1.1: Acquire three-dimensional image data of the head, neck, and chest of a human body when standing; specifically, use a 3D human body scanner to scan and obtain a 3D human body model of the head, neck, and chest, or use imaging equipment (X-ray, CT) to take 3D skeletal images of the head, neck, and chest.

[0047] The required body position for a 3D human scanner is as follows: body upright, head positioned with the Frankfurt plane, eyes looking straight ahead, shoulders relaxed, upper limbs hanging naturally, hands extended with palms facing inward and fingers lightly touching the sides of the thighs, left and right feet facing straight ahead, and weight evenly distributed on both feet.

[0048] During scanning, the head, neck, and chest are the core scanning areas. The device moves at a constant speed along an "S"-shaped trajectory, covering an area from the top of the skull to the xiphoid process of the sternum. For women, hair should be wrapped in sections (with a spacing of ≤2cm) to avoid localized bulges. If necessary, both men and women can wear tight-fitting hairpieces for fixation. All these measures are to ensure the integrity of the head, neck, and chest model, providing accurate data support for personalized customization.

[0049] The requirements for taking frontal and side-view head, neck, and chest photos are as follows: Stand upright against a wall, with your head aligned with the Frankfurt plane, eyes looking straight ahead, shoulders relaxed, arms hanging naturally at your sides, hands extended straight with palms facing inwards and fingers lightly touching the sides of your thighs, left and right feet facing straight ahead, and weight evenly distributed on both feet. A ruler is affixed to the wall to provide a proportional reference for the frontal and side-view photos. The photo should be taken directly towards the center of the person, ensuring the head, neck, and chest are fully visible.

[0050] S1.2: Obtaining Human Body Dimension Data: Human body dimension data is derived from 3D image data, including shoulder width, head width, cheekbone width, jaw length, head length, and head circumference. A recognition processing module is used to obtain human body dimension data. The recognition processing module has undergone deep learning in advance and can automatically identify feature points and their lengths and angles, and calculate human body dimension data. Feature points include the head, cervical spine, shoulders, temporal bone, cheekbone, and jaw.

[0051] S1.3: Obtaining the head weight value in the neutral position: The test subject lies on their side on the head weight measuring device, which can be raised and lowered and records the head weight in real time. The head weight measuring device is raised at a constant speed of 1cm / s, and the head weight at different heights is recorded simultaneously in mm. The head weight measuring instrument measures the head weight corresponding to pillows of different heights, and plots a dynamic curve of head weight changing with pillow height when lying on the side. The neutral head weight value is obtained by dynamic fitting calculation. Hneutral The relationship between head weight and pillow height is W = f * H, where H is the pillow height in centimeters, and the measurement range is H ∈ [H]. min H max ], where H min H is the minimum height. max The maximum height is represented by W; the head weight is represented by W in kilograms; the head weight in the neutral position is... Hneutral The corresponding pillow height is the initial optimal pillow height, at which point the head, neck, and thoracic spine are aligned, maintaining a good physiological curve for the head, neck, and chest in the side-lying position. For example... Figure 8 As shown, the significant inflection point that appears after the stable segment of the dynamic curve represents the neutral head weight value. Hneutral .

[0052] S1.4: Head Zone Pressure Testing: Based on the initial optimal pillow height and the combination of the basic memory foam layer, the pressure distribution of the six zones of the head is tested when lying on one's side. This is used to adjust the distribution of the softness and firmness of the 3D-printed custom support and memory foam layer 1, ensuring effective distribution of head pressure and increasing comfort. The head is divided into six zones: the frontal zone, the back of the forehead, the forehead-zygomatic complex zone, the periauricular zone, the jawline zone, and the back of the neck zone. The pressure distribution of the six zones is represented by a pressure heat map; the darker the color, the greater the pressure, with red indicating the highest pressure zone. Figure 9 As shown.

[0053] S2: Custom Pillow Design Process: A custom pillow consists of a pillow frame, a memory foam layer 1, and a pillowcase. The pillow frame and memory foam layer 1 are assembled inside the pillowcase. The pillow frame includes a support assembly 2 and a beam assembly 3. The support assembly 2 is located below the beam assembly 3 and is used to support the beam assembly 3. The support assembly 2 includes two sets of side-by-side support structures. Each set of support structures includes a base 4 and multiple sets of support columns 5, which are fixed to the base 4. The beam assembly 3 includes a front crossbeam 7, a rear crossbeam 6, and two sets of side beams 8. The front crossbeam 7, rear crossbeam 6, and two sets of side beams 8 form a rectangular frame structure. The support columns 5 are used to support the two sets of side beams 8. Multiple sets of longitudinal support bars 9 are provided between the front crossbeam 7 and the rear crossbeam 6. The longitudinal support bars 9 have an arc-shaped structure. The front crossbeam 7 forms a first angle with the horizontal plane (the first angle is 0°-30°), and the rear crossbeam 6 forms a second angle with the horizontal plane; the sides of the front crossbeam 7 and the rear crossbeam 6 that are far apart from each other are inclined upward; the memory foam layer 1 is installed on the rectangular frame structure.

[0054] S2.1: Calculate the height of the pillow frame: Calculate multidimensional human body parameters based on human body size data, and then calculate the height of the pillow frame based on these parameters. These multidimensional human body parameters include the difference between shoulder width and head width, head width, cheekbone width, the difference between head width and cheekbone width, and the angle between the cheekbone and mandible. The difference between shoulder width and head width yields the optimal height of the pillow frame. The head width, cheekbone width, and the difference between head width and cheekbone width determine the lateral support range of the pillow frame, which is the distance between the front crossbeam 7 and the rear crossbeam 6, i.e., the distance between the two sides of the side beam 8 (not its length). The angle between the cheekbone and mandible determines the first angle of the front crossbeam 7.

[0055] S2.2: Design the shape of the pillow frame: based on 3D image data and measured head weight in a neutral position while lying on the side. Hneutral The design includes the lengths of the front crossbeam 7 and the rear crossbeam 6, their widths, first angle, second angle, number of longitudinal support bars 9, and the degree of concave curvature of the longitudinal support bars 9, based on the pressure distribution across the six head zones. Specifically:

[0056] If the subject's head weight is greater than that of 75% of the population (head weight data from 5000 people collected beforehand), the number of longitudinal support strips 9 is increased from the standard number, and the concavity of the longitudinal support strips 9 is reduced from the standard concavity. If the subject's head weight is less than that of 25% of the population, the number of longitudinal support strips 9 is reduced from the standard number, and the concavity of the longitudinal support strips 9 is increased from the standard concavity. The number of longitudinal support strips 9 is 3-6 sets, with a standard number of 4 sets. The concavity range of the longitudinal support strips 9 is 0-20mm, where 0 represents a straight longitudinal support strip with no concavity. A concavity of 20mm for the longitudinal support strips 9 represents a concavity height of 20mm. The standard concavity is 10mm.

[0057] The frontal region is supported by the anterior crossbeam 7, and the posterior region is supported by the posterior crossbeam 6. If the strongest dark red area appears when the pressure is tested in the frontal and posterior regions, it indicates that the pressure distribution is too large, and a second angle needs to be added.

[0058] The forehead-zygomatic complex area and the periauricular area are designed with longitudinal support strips 9 for support; if the forehead-zygomatic complex area and the periauricular area show the strongest dark red area during testing, it indicates that the pressure distribution is too large, and the number of longitudinal support strips 9 needs to be reduced to increase the degree of arc concavity.

[0059] The mandibular region and the posterior neck region are supported by the anterior crossbeam 7; if the strongest dark red area appears during the testing of the mandibular region and the posterior neck region, it indicates that the pressure distribution is too large, and a second angle needs to be added.

[0060] If the length of the mandible is less than that of 75% of the population or the head circumference is less than that of 75% of the population, then the first angle needs to be reduced and the distance between the anterior crossbeam 7 and the posterior crossbeam 6 needs to be reduced.

[0061] The distance between the front crossbeam 7 and the rear crossbeam 6 is adjusted according to the ratio of the forehead-zygomatic complex area and the head length of the subject.

[0062] S2.3: Obtaining the Hardness of the Memory Foam Layer: Based on the pre-established memory foam layer library, determine the hardness of the memory foam layer by finding the correspondence between head weight and the degree of memory foam sagging; adjust the hardness of the memory foam layer in the corresponding area according to the pressure distribution of the six zones at the head. The memory foam layer library is pre-established and includes memory foams with different hardnesses ranging from Shore hardness (20-50 degrees). Previous tests have already been conducted on the degree of memory foam sagging under different head weights, clarifying that different head weights should correspond to different hardnesses of memory foam.

[0063] S3: Integrate customized parameters, create a 3D model of the pillow frame, and complete the printing; customize the memory foam layer according to the hardness requirements of the memory foam layer in each position and the shape and size of the pillow frame.

[0064] S4: Complete the assembly of the memory foam layer, pillow frame, and pillowcase.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0066] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for 3D printing a custom pillow for lateral recumbent positions based on a three-dimensional human body model, characterized by: include S1: Custom Pillow Evaluation Process: S1.1: Acquire three-dimensional image data of the head, neck, and chest of a human body when standing; S1.2: Obtain human body size data: Obtain human body size data based on 3D image data, including shoulder width, head width, cheekbone width, jaw length, head length, and head circumference; S1.3: Obtaining the Neutral Head Weight Value: The test subject lies on their side on the head weight measuring device, which can be raised and lowered and records the head weight in real time. The head weight measuring instrument measures the head weight corresponding to pillows of different heights, plots a dynamic curve of head weight changing with pillow height while lying on their side, and dynamically fits and calculates the neutral head weight value Hneutral. The relationship between head weight and pillow height is W = f * H, where H is the pillow height in centimeters, and the measurement range is H ∈ [H min H max ], where H min H is the minimum height. max The maximum height is represented by W, which represents the head weight in kilograms. The pillow height corresponding to the neutral head weight value Hneutral is the initial optimal pillow height, at which point the head, neck, and thoracic vertebrae are aligned. S1.4: Test head zone pressure: Test the pressure distribution of the six zones of the head when lying on the side, based on the initial optimal pillow height and the combination of the basic memory foam layer; the head is divided into six zones, namely the frontal zone, the back of the forehead, the frontozygomatic complex zone, the periauricular zone, the mandibular zone and the back of the neck zone; S2: Custom Pillow Design Process: A custom pillow includes a pillow frame, a memory foam layer, and a pillowcase. The pillow frame and memory foam layer are assembled inside the pillowcase. The pillow frame includes a support assembly and a beam assembly. The support assembly is located below the beam assembly and is used to support the beam assembly. The support assembly includes two sets of side-by-side support structures. Each set of support structures includes a base and multiple sets of support columns, which are fixed to the base. The beam assembly includes a front crossbeam, a rear crossbeam, and two sets of side beams. The front crossbeam, rear crossbeam, and two sets of side beams form a rectangular frame structure. The support columns are used to support the two sets of side beams. Multiple sets of longitudinal support strips are provided between the front and rear crossbeams. The longitudinal support strips are arc-shaped. The front crossbeam forms a first angle with the horizontal plane, and the rear crossbeam forms a second angle with the horizontal plane. The sides of the front and rear crossbeams that are far apart from each other are inclined upwards. The memory foam layer is installed on the rectangular frame structure; S2.1: Calculating the height of the pillow frame: Calculate multidimensional human body parameters based on human body size data, and then calculate the height of the pillow frame based on these parameters. These multidimensional human body parameters include the difference between shoulder width and head width, head width, cheekbone width, the difference between head width and cheekbone width, and the angle between the cheekbone and mandible. The difference between shoulder width and head width yields the optimal height of the pillow frame. The head width, cheekbone width, and the difference between head width and cheekbone width determine the lateral support range of the pillow frame, which is the distance between the front and rear crossbeams. The angle between the cheekbone and mandible determines the first angle of the front crossbeam. S2.2: Design the shape of the pillow frame: Based on 3D image data, measured head weight (Hneutral) in a neutral position during lateral lying, and the pressure distribution in the six zones of the head, design the length, width, first angle, second angle, number of longitudinal support bars, and the degree of concave curvature of the longitudinal support bars; specifically: If the subject's head weight is greater than that of 75% of the population, increase the number of longitudinal support strips to the standard number and decrease the degree of concavity of the longitudinal support strips to the standard degree of concavity; if the subject's head weight is less than that of 25% of the population, decrease the number of longitudinal support strips to the standard number and increase the degree of concavity of the longitudinal support strips to the standard degree of concavity; the number of longitudinal support strips is 3-6 sets, with a standard number of 4 sets; the degree of concavity of the longitudinal support strips ranges from 0-20mm, where 0 represents a straight longitudinal support strip with no concavity; a concavity of 20mm represents a concavity height of 20mm for the longitudinal support strips; The standard concavity is 10mm; The frontal region is supported by the anterior crossbeam, and the posterior region is supported by the posterior crossbeam. If the strongest dark red area appears when pressure is measured in the frontal and posterior regions, it indicates that the pressure distribution is too large, and a second angle needs to be added. Vertical support strips are designed to support the forehead-zygomatic complex area and the periauricular area. If the strongest dark red area appears during the detection of the forehead-zygomatic complex area and the periauricular area, it indicates that the pressure distribution is too large. In this case, the number of vertical support strips needs to be reduced and the degree of arc concavity needs to be increased. The mandibular region and the posterior neck region are supported by the anterior crossbeam; if the strongest dark red area appears during the examination of the mandibular region and the posterior neck region, it indicates that the pressure distribution is too large, and a second angle needs to be added; If the length of the mandible is less than that of 75% of the population or the head circumference is less than that of 75% of the population, then the first angle needs to be reduced and the distance between the anterior and posterior crossbeams needs to be reduced. The distance between the front and rear crossbeams is adjusted according to the ratio of the forehead-zygomatic complex area and the head length of the subject; S2.3: Obtain the hardness of the memory foam layer: Based on the pre-established memory foam layer library, find the correspondence between head weight and the degree of memory foam sinking to determine the hardness of the memory foam layer; adjust the hardness of the memory foam layer in the corresponding area according to the pressure distribution of the six zones of the head. S3: Integrate customized parameters, create a 3D model of the pillow frame, and complete the printing; customize the memory foam layer according to the hardness requirements of the memory foam layer in each position and the shape and size of the pillow frame; S4: Complete the assembly of the memory foam layer, pillow frame, and pillowcase.

2. The method for creating a 3D-printed custom pillow based on a three-dimensional human body model according to claim 1, characterized in that: In step S1.1, three-dimensional image data of the head, neck, and chest of a human body when standing are obtained; Specifically, it involves using a 3D human scanner to obtain a 3D human body model of the head, neck, and chest, or using equipment to capture 3D skeletal images of the head, neck, and chest.

3. The method for creating a 3D-printed custom pillow based on a three-dimensional human body model according to claim 2, characterized in that: In step S1.2, a recognition processing module is used to obtain human body size data. The recognition processing module has been pre-learned through deep learning. The recognition processing module can automatically identify feature points and their lengths and angles, and calculate human body size data. Feature points include the head, cervical spine, shoulders, temporal bone, cheekbone, and mandible.

4. The method for creating a 3D-printed custom pillow based on a three-dimensional human body model according to claim 1, characterized in that: In step S1.4, the pressure distribution in the six head zones is represented by a pressure heatmap.

5. The method for creating a 3D-printed custom pillow based on a three-dimensional human body model according to claim 1, characterized in that: The first angle is 0°-30°.

6. The method for creating a 3D-printed custom pillow based on a three-dimensional human body model according to claim 1, characterized in that: In step S1.3, the inflection point that appears after the stable segment of the dynamic curve is the neutral head weight value Hneutral.

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