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

Abstract

The invention belongs to the technical field of customized pillows, and particularly discloses a method for 3D printing of a side-lying customized pillow based on a human body three-dimensional model, and the method comprises a customized pillow evaluation process: obtaining three-dimensional image data of a head, a neck and a chest when a human body stands, obtaining human body size data, obtaining a neutral position head weight value, and testing head partition pressure; designing the customized pillow: calculating the height of the pillow skeleton, designing the shape of the pillow skeleton, and obtaining the hardness of the memory foam layer; printing a pillow framework, and customizing a memory foam layer; and assembling the memory foam layer, the pillow framework and the pillowcase. The traditional data limitation of only depending on single cervical curvature is broken through, and the customized pillow is designed by combining the human body size data, the partition pressure and the head weight, so that the customized pillow better conforms to the ergonomics.

Description

Technical Field

[0001] The present invention belongs to the technical field of customized pillows, and in particular relates to a method for 3D printing a customized pillow for side-sleeping based on a three-dimensional model of the human body. Background Art

[0002] Sleeping position and pillow compatibility are core factors affecting sleep quality: ① Compared with the supine position, side sleeping can significantly improve respiratory patency (reduce snoring and apnea) and reduce the risk of cardiovascular events. ② Anatomical differences: The human body's cervical spine curvature, thoracic spine curvature, shoulder width and head width vary significantly. When sleeping on the side, the pillow height must match, otherwise it will lead to neck muscle imbalance (inducing stiff neck, cervical spondylosis) or tracheal folding (affecting breathing). ③ Lack of dynamic adaptation: Traditional pillows are mainly based on material innovation (such as memory foam layers, latex) or uniform height design, and cannot dynamically adapt to the personalized needs of different body shapes and sleeping positions. ④ Existing 3D printed custom pillows mostly focus on static support structures (such as the physiological curvature fit of neck pillows), lack mechanical analysis of the side-sleeping position, and do not integrate respiratory channel design, resulting in an inability to systematically solve sleep disorders.

[0003] For example, the invention patent application with publication number CN109454875A obtains the user's neck and shoulder contours through three-dimensional scanning to customize a 3D printed pillow. However, it only relies on anatomical morphology scanning and does not integrate biomechanical parameters (such as head weight and shoulder and neck pressure distribution), and cannot be fully adapted. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for 3D printing a customized pillow for side sleepers based on a three-dimensional model of the human body, so as to achieve three-dimensional dynamic alignment of the head-cervical-thoracic spine, so that the cervical spine is in a neutral position that conforms to the natural curvature of the human body; based on this physiological alignment, the bilateral shoulder and neck muscle groups can reach a state of mechanical balance, avoiding the risk of stiff neck caused by unilateral abnormal muscle tension; at the same time, the neutral position accurately maintains the maximum patency of the airway, effectively eliminating the airway folding phenomenon caused by uncomfortable pillow height.

[0005] In order to achieve the above object, the technical solution of the present invention is: a method for 3D printing a customized pillow for side sleeping based on a three-dimensional model of the human body, comprising: S1: Custom pillow evaluation process: S1.1: Acquire three-dimensional image data of the head, neck, and chest of a standing human body; S1.2: Obtaining human body size data: Obtaining human body size data based on the three-dimensional image data. The human body size data includes shoulder width, head width, zygomatic width, mandibular length, head length, and head circumference; S1.3: Obtaining the neutral head weight value: The subject lies sideways on a head weight measuring device that can be raised and lowered and records head weight in real time. The head weight measuring device measures the head weight corresponding to pillows of different heights, plots a dynamic curve of head weight changing with pillow height when lying sideways, and calculates the neutral head weight value using dynamic fitting. 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 is the minimum height, H max is the highest height; W is the head weight in kilograms; neutral head weight value Hneutral The corresponding pillow height is the initial optimal pillow height, at which point the head, neck, and thoracic spine are aligned; S1.4: Test head zone pressure: Based on the initial optimal pillow height and the combination of the basic memory foam layer, test the pressure distribution of the six zones of the head when lying on the side. The head is divided into six zones: the frontal area, the back of the forehead area, the frontal-zygomatic area, the periauricular area, the mandibular area, and the back of the neck area. S2: Process of designing a customized pillow: A customized pillow includes a pillow frame, a memory foam layer and a pillowcase, wherein the pillow frame and the memory foam layer are assembled in the pillowcase; the pillow frame includes a support assembly and a beam assembly, wherein the support assembly is located below the beam assembly and is used to support the beam assembly; the support assembly includes two groups of support structures arranged side by side, each group of the support structures includes a base and multiple groups of support columns, and multiple groups of support columns are fixed to the base; the beam assembly includes a front crossbeam, a rear crossbeam and two groups of side beams, and the front crossbeam, the rear crossbeam and the two groups of side beams form a rectangular frame structure, and the support columns are used to support the two groups of side beams; multiple groups of longitudinal support bars are provided between the front crossbeam and the rear crossbeam, and the longitudinal support bars are arc 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; S2.1: Calculate the height of the pillow frame: Calculate multi-dimensional human body parameters based on human body size data, and calculate the height of the pillow frame based on 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 the zygomatic bone and mandible; the difference between shoulder width and head width can determine the optimal height of the pillow frame; the head width, zygomatic width, and the difference between head width and zygomatic width can determine the lateral support range of the pillow frame, which is the distance between the front and rear crossbars; the angle between the zygomatic bone and mandible can determine the first angle of the front crossbar; S2.2: Design the shape of the pillow frame: Based on the three-dimensional image data and the measured head weight in the neutral position when lying on the side HneutralThe length of the front and rear cross beams, the width of the front and rear cross beams, the first angle, the second angle, the number of longitudinal support bars, and the degree of arc concavity of the longitudinal support bars are designed based on the pressure distribution of the six zones of the head; S2.3: Obtaining the hardness of the memory foam layer: Based on a 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 sinkage. Adjust the hardness of the memory foam layer in the corresponding area based on the pressure distribution of the six zones of the head. S3: Integrate customized parameters, build a 3D model of the pillow frame, and complete printing; customize the memory foam layer according to the hardness requirements of each position of the memory foam layer and the shape and size of the pillow frame; S4: Complete the assembly of memory foam layer, pillow frame and pillowcase.

[0006] Furthermore, in step S1.1, three-dimensional image data of the head, neck and chest of a standing human body is obtained; specifically, a three-dimensional human body model of the head, neck and chest is obtained by scanning with a human body three-dimensional scanner, or a three-dimensional imaging skeletal image of the head, neck and chest is taken using a device.

[0007] Furthermore, in step S1.2, an identification processing module is used to obtain human body dimension data. The identification processing module has undergone deep learning in advance. The identification processing module can automatically identify characteristic part points and the lengths and angles of the characteristic part points, and calculate the human body dimension data; the characteristic part points include the head, cervical spine, shoulders, temporal bones, zygomatic bones, and mandible.

[0008] Furthermore, in step S1.4, the pressure distribution of the six regions of the head is represented by a pressure heat map.

[0009] Furthermore, in step S2.2, the shape of the pillow frame is designed: according to the three-dimensional data and the measured head weight in the neutral position when lying on the side Hneutral The length of the front and rear crossbeams, the width of the front and rear crossbeams, the first angle, the second angle, the number, width and arc concave degree of the longitudinal support bars are designed according to the pressure distribution of the six zones of the head. Specifically: If the subject's head weight is greater than that of 75% of the population, the number of longitudinal support bars will be increased based on the standard number and the degree of concavity of the longitudinal support bars will be reduced based on the standard degree of concavity; if the subject's head weight is less than that of 25% of the population, the number of longitudinal support bars will be reduced based on the standard number and the degree of concavity of the longitudinal support bars will be increased based on the standard degree of concavity; the number of longitudinal support bars is 3-6 groups, and the standard number is 4 groups; the degree of concavity of the longitudinal support bars ranges from 0 to 20 mm, where 0 represents a straight longitudinal support bar with no concavity; a concavity of 20 mm for the longitudinal support bars means that the concavity height of the longitudinal support bars is 20 mm; the standard degree of concavity is 10 mm; The frontal area is supported by the front beam, and the posterior area is supported by the posterior beam. If the strongest dark red area appears during pressure testing of the frontal and posterior areas, it means that the pressure distribution is too large, and a second angle needs to be added. Longitudinal support strips are designed to support the forehead-zygomatic complex area and the periauricular area. If the strongest dark red area appears during testing in the forehead-zygomatic complex area and the periauricular area, it means that the pressure distribution is too large. In this case, the number of longitudinal support strips should be reduced and the degree of arc concavity should be increased. The mandibular area and the back of the neck are supported by the front crossbeam. If the strongest dark red area appears when testing the mandibular area and the back of the neck, it means 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, it is necessary to reduce the first angle and the distance between the front and rear crossbars; The distance between the front and rear beams was adjusted according to the ratio of the frontozygomatic complex area to the head length of the subject.

[0010] Furthermore, the first angle is 0°-30°.

[0011] Furthermore, in step S1.3, the turning point after the stable section of the dynamic curve is the neutral head weight value. Hneutral .

[0012] The beneficial effects of this technical solution are: Achieve 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; based on this physiological alignment, the bilateral shoulder and neck muscle groups can achieve a state of mechanical balance, avoiding the risk of stiff neck caused by unilateral muscle tension abnormalities; at the same time, the neutral position accurately maintains the maximum patency of the airway, effectively eliminating the airway folding phenomenon caused by uncomfortable pillow height; ultimately, through the triple synergistic effect of spinal alignment optimization, muscle balance and airway patency, it systematically reduces sleep snoring and sleep apnea events, improves respiratory ventilation efficiency, and fundamentally improves sleep quality.

[0013] Breaking through the limitations of traditional data that only relies on a single cervical curvature, we design customized pillows by combining human body size data, zone pressure and head weight, making customized pillows more ergonomic. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a flow chart of a method for 3D printing a customized pillow for side sleepers based on a three-dimensional model of the human body according to the present invention; Figure 2 A three-dimensional image of a custom pillow; Figure 3 for Figure 2 The main view; Figure 4 for Figure 2Schematic diagram of the structure of the pillow skeleton; Figure 5 for Figure 2 Schematic diagram of the structure of the middle memory foam layer; Figure 6 This is a partition diagram of the six partitions of the head; Figure 7 This is a schematic diagram of the head, neck and chest alignment; Figure 8 This is the dynamic curve of head weight changing with pillow height; Figure 9 This is a pressure heat map. DETAILED DESCRIPTION

[0015] The following is further described in detail through specific implementation methods: The reference numerals in the drawings of the specification include: memory foam layer 1, support assembly 2, beam assembly 3, base 4, support column 5, rear cross beam 6, front cross beam 7, side beam 8, longitudinal support bar 9.

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] The embodiment is basically as shown in the attached Figure 1-9 As shown: A method for 3D printing a customized pillow for side sleeping based on a three-dimensional model of the human body, as shown Figure 1 As shown, the following steps are included: S1: Custom pillow evaluation process: S1.1: Obtain three-dimensional image data of the head, neck, and chest of a standing human body; specifically, use a three-dimensional human body scanner to scan and obtain a three-dimensional human body model of the head, neck, and chest, or use imaging equipment (X-ray, CT) to take a three-dimensional imaging skeletal image of the head, neck, and chest.

[0018] The scanning posture requirements of the human body 3D scanner are as follows: the body is straight, the head is positioned in the Frankfurt plane, the eyes are looking straight ahead, the shoulders are relaxed, the upper limbs are naturally drooping, the hands are straight, the palms are facing inward, the fingers are lightly touching the sides of the thighs, the left and right feet are facing straight ahead, and the weight is evenly distributed on the two feet.

[0019] The head, neck, and chest are the core scanning areas during scanning. The device moves at a constant speed in an S-shaped trajectory, covering at least the area from the top of the skull to the xiphoid process of the sternum. Women's hair should be wrapped in bundles (with bundle spacing ≤ 2 cm) to avoid localized bulges. If necessary, both men and women can wear tight-fitting wigs to secure the hair. These measures are all designed to ensure the integrity of the head, neck, and chest model and provide accurate data support for personalized customization.

[0020] Requirements for capturing anteroposterior and lateral head, neck, and chest images are as follows: Stand upright against a wall, head aligned with the Frankfurt plane, eyes looking straight ahead, shoulders relaxed, upper limbs hanging naturally, arms extended with palms facing inward, fingers lightly touching the sides of thighs, left and right feet facing straight ahead, weight evenly distributed across both feet. A scale is posted on the wall for proportional reference when aligning anteroposterior and lateral images. Shoot directly in the center of the subject, ensuring the head, neck, and chest are fully visible.

[0021] S1.2: Obtaining human body dimension data: Obtaining human body dimension data based on three-dimensional image data. The human body dimension data includes shoulder width, head width, zygomatic width, mandibular length, head length, and head circumference. A recognition processing module is used to obtain the human body dimension data. The recognition processing module has undergone deep learning in advance. The recognition processing module can automatically identify characteristic part points and the lengths and angles of the characteristic part points, and calculate the human body dimension data. The characteristic part points include the head, cervical spine, shoulders, temporal bones, zygomatic bones, and mandibular.

[0022] S1.3: Obtaining the neutral head weight value: The subject lies sideways on a head weight measuring device that can be raised and lowered and records head weight in real time. The device is raised at a constant speed of 1 cm / s and simultaneously records head weight at different heights in millimeters. The head weight measuring device measures the head weight corresponding to pillows of different heights, plots a dynamic curve of head weight changing with pillow height when lying sideways, and calculates the neutral head weight value using dynamic fitting. 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 is the minimum height, H max is the highest height; W is the head weight in kilograms; neutral head weight value 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 of the head, neck, and chest in the side-lying position. Figure 8 As shown in the figure, the obvious turning point after the stable section of the dynamic curve is the neutral head weight value. Hneutral .

[0023] S1.4: Test the pressure of the head zones: Based on the initial optimal pillow height and the combination of the basic memory foam layer, test the pressure distribution of the six zones of the head when lying on the side. This is used to adjust the distribution of the soft and hard areas of the 3D printed custom bracket and the memory foam layer 1 to ensure effective distribution of head pressure and increase comfort. The head is divided into six zones, namely the frontal area, the back of the forehead area, the forehead-zygomatic complex area, the ear area, the mandibular area, and the back of the neck area. The pressure distribution of the six zones of the head is represented by a pressure heat map. The darker the color, the greater the pressure. Red indicates the highest pressure area. Figure 9shown.

[0024] S2: Process of designing a customized pillow: The customized pillow includes a pillow frame, a memory foam layer 1 and a pillowcase, and the pillow frame and the memory foam layer 1 are assembled in 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 groups of support structures arranged side by side, and each group of support structures includes a base 4 and multiple groups of support columns 5, and the multiple groups of support columns 5 are fixed to the base 4. The beam assembly 3 includes a front crossbeam 7, a rear crossbeam 6 and two groups of side beams 8. The front crossbeam 7, the rear crossbeam 6 and the two groups of side beams 8 form a rectangular frame structure, and the support columns 5 are used to support the two groups of side beams 8; a plurality of groups of longitudinal support bars 9 are provided between the front crossbeam 7 and the rear crossbeam 6, and the longitudinal support bars 9 are arc-shaped structures. A first angle (the first angle is 0°-30°) is formed between the front crossbeam 7 and the horizontal plane, and a second angle is formed between the rear crossbeam 6 and the horizontal plane; the sides of the front crossbeam 7 and the rear crossbeam 6 that are away from each other are inclined upward; the memory foam layer 1 is installed on the rectangular frame structure.

[0025] S2.1: Calculate the height of the pillow skeleton: calculate multi-dimensional human body parameters based on human body size data, and calculate the height of the pillow skeleton based on the multi-dimensional human body parameters; the multi-dimensional human body parameters include the difference between shoulder width and head width, head width, cheekbone width and the difference between head width and cheekbone width, and the angle between the cheekbone and the mandible; the difference between shoulder width and head width can obtain the optimal height of the pillow skeleton; the head width, cheekbone width and the difference between head width and cheekbone width can determine the lateral support range of the pillow skeleton, and the lateral support range is the distance between the front beam 7 and the rear beam 6, that is, the distance between the two sides of the side beam 8 (not the length); the angle between the cheekbone and the mandible can determine the first angle of the front beam 7.

[0026] S2.2: Design the shape of the pillow frame: Based on the three-dimensional image data and the measured head weight in the neutral position when lying on the side Hneutral The length of the front cross beam 7 and the rear cross beam 6, the width of the front cross beam 7 and the rear cross beam 6, the first angle, the second angle, the number of longitudinal support bars 9, and the degree of arc concavity of the longitudinal support bar 9 are designed according to the pressure distribution of the six zones of the head; specifically: If the head weight of the subject is greater than that of 75% of the population (head weight data of 5,000 people were collected in advance), the number of longitudinal support bars 9 will be increased based on the standard number and the degree of concavity of the longitudinal support bars 9 will be reduced based on the standard degree of concavity; if the head weight of the subject is less than that of 25% of the population, the number of longitudinal support bars 9 will be reduced based on the standard number and the degree of concavity of the longitudinal support bars 9 will be increased based on the standard degree of concavity; the number of longitudinal support bars 9 is 3-6 groups, and the standard number is 4 groups; the degree of concavity of the longitudinal support bars 9 ranges from 0 to 20 mm, where 0 is a straight longitudinal support bar with no concavity; a degree of concavity of 20 mm for the longitudinal support bars 9 means that the concavity height of the longitudinal support bars 9 is 20 mm; the standard degree of concavity is 10 mm.

[0027] The front forehead area is supported by the front crossbeam 7, and the back forehead area is supported by the back crossbeam 6; if the strongest dark red area appears during pressure testing of the front and back forehead areas, it means that the pressure distribution is too large, and a second angle needs to be added.

[0028] Longitudinal support strips 9 are designed to provide support at 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 means that the pressure distribution is too large, and the number of longitudinal support strips 9 needs to be reduced and the degree of arc concavity needs to be increased.

[0029] The mandibular area and the back of the neck are supported by the front crossbeam 7; if the strongest dark red area appears when the mandibular area and the back of the neck are detected, it means that the pressure distribution is too large, and the second angle needs to be increased.

[0030] 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, it is necessary to reduce the first angle and reduce the distance between the front cross beam 7 and the rear cross beam 6 .

[0031] The distance between the front crossbeam 7 and the rear crossbeam 6 is adjusted according to the ratio of the frontal-zygomatic complex area to the head length of the subject.

[0032] S2.3: Determine the firmness of the memory foam layer: Based on a pre-established memory foam layer library, determine the correspondence between head weight and memory foam sinkage. Adjust the firmness of the memory foam layer in each of the six head zones based on the pressure distribution. The pre-established memory foam layer library includes memory foams of varying hardnesses, ranging from 20-50 Shore A. Previous testing of memory foam sinkage under varying head weights has been conducted to clarify the appropriate firmness for each head weight.

[0033] S3: Integrate customized parameters, build a 3D model of the pillow skeleton, and complete 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 skeleton.

[0034] S4: Complete the assembly of the memory foam layer, pillow frame and pillowcase.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] The above is only an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for 3D printing a customized pillow for side sleepers 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 standing human body; S1.2: Obtaining human body size data: Obtaining human body size data based on the three-dimensional image data. The human body size data includes shoulder width, head width, zygomatic width, mandibular length, head length, and head circumference; S1.3: Obtaining the neutral head weight value: The subject lies on their side on a head weight measuring device that can be raised and lowered and records head weight in real time. The head weight measuring device measures the head weight corresponding to pillows of different heights, plots a dynamic curve of head weight changing with pillow height when lying on their side, and calculates the neutral head weight value using dynamic fitting. 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 is the minimum height, H max is the highest height; W is the head weight in kilograms; neutral head weight value Hneutral The corresponding pillow height is the initial optimal pillow height, at which point the head, neck, and thoracic spine are aligned; S1.4: Test head zone pressure: Based on the initial optimal pillow height and the combination of the basic memory foam layer, test the pressure distribution of the six zones of the head when lying on the side. The head is divided into six zones: the frontal area, the back of the forehead area, the frontal-zygomatic area, the periauricular area, the mandibular area, and the back of the neck area. S2: Process of designing a customized pillow: A customized pillow includes a pillow frame, a memory foam layer and a pillowcase, wherein the pillow frame and the memory foam layer are assembled in the pillowcase; the pillow frame includes a support assembly and a beam assembly, wherein the support assembly is located below the beam assembly and is used to support the beam assembly; the support assembly includes two groups of support structures arranged side by side, each group of the support structures includes a base and multiple groups of support columns, and multiple groups of support columns are fixed to the base; the beam assembly includes a front crossbeam, a rear crossbeam and two groups of side beams, and the front crossbeam, the rear crossbeam and the two groups of side beams form a rectangular frame structure, and the support columns are used to support the two groups of side beams; multiple groups of longitudinal support bars are provided between the front crossbeam and the rear crossbeam, and the longitudinal support bars 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 that is away from each other is inclined upward; The memory foam layer is mounted on the rectangular frame structure; S2.1: Calculate the height of the pillow frame: Calculate multi-dimensional human body parameters based on human body size data, and calculate the height of the pillow frame based on 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 the zygomatic bone and mandible; the difference between shoulder width and head width can determine the optimal height of the pillow frame; the head width, zygomatic width, and the difference between head width and zygomatic width can determine the lateral support range of the pillow frame, which is the distance between the front and rear crossbars; the angle between the zygomatic bone and mandible can determine the first angle of the front crossbar; S2.2: Design the shape of the pillow frame: Based on the three-dimensional image data and the measured head weight in the neutral position when lying on the side Hneutral The length of the front and rear cross beams, the width of the front and rear cross beams, the first angle, the second angle, the number of longitudinal support bars, and the degree of arc concavity of the longitudinal support bars are designed based on the pressure distribution of the six zones of the head; S2.3: Obtaining the hardness of the memory foam layer: Based on a 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 sinkage. Adjust the hardness of the memory foam layer in the corresponding area based on the pressure distribution of the six zones of the head. S3: Integrate customized parameters, build a 3D model of the pillow frame, and complete printing; customize the memory foam layer according to the hardness requirements of each position of the memory foam layer 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 3D printing a customized pillow for side sleeping 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 standing human body 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 a three-dimensional imaging skeletal image of the head, neck and chest is taken using equipment.

3. The method for 3D printing a customized pillow for side sleeping based on a three-dimensional human body model according to claim 2, characterized in that: In step S1.2, an identification processing module is used to obtain human body dimension data. The identification processing module has been pre-trained through deep learning. The identification processing module can automatically identify characteristic points and their lengths and angles, and calculate the human body dimension data; the characteristic points include the head, cervical spine, shoulders, temporal bones, zygomatic bones, and mandible.

4. The method for 3D printing a customized pillow for side sleeping based on a three-dimensional human body model according to claim 1, characterized in that: In step S1.4, the pressure distribution of the six regions of the head is represented by a pressure heat map.

5. The method for 3D printing a customized pillow for side sleeping based on a three-dimensional human body model according to claim 4, characterized in that: In step S2.2, the shape of the pillow frame is designed based on the three-dimensional data and the measured head weight in the neutral position when lying on the side. Hneutral The length of the front and rear crossbeams, the width of the front and rear crossbeams, the first angle, the second angle, the number, width and arc concave degree of the longitudinal support bars are designed according to the pressure distribution of the six zones of the head. Specifically: If the subject's head weight is greater than that of 75% of the population, the number of longitudinal support bars is increased based on the standard number and the degree of concavity of the longitudinal support bars is reduced based on the standard degree of concavity; if the subject's head weight is less than that of 25% of the population, the number of longitudinal support bars is reduced based on the standard number and the degree of concavity of the longitudinal support bars is increased based on the standard degree of concavity; the number of longitudinal support bars is 3-6 groups, and the standard number is 4 groups; the degree of concavity of the longitudinal support bars ranges from 0 to 20 mm, where 0 represents a straight longitudinal support bar with no concavity; a concavity of 20 mm represents a concavity height of 20 mm; The standard concave degree is 10mm; The frontal area is supported by the front beam, and the posterior area is supported by the posterior beam. If the strongest dark red area appears during pressure testing of the frontal and posterior areas, it means that the pressure distribution is too large, and a second angle needs to be added. Longitudinal support strips are designed to support the forehead-zygomatic complex area and the periauricular area. If the strongest dark red area appears during testing in the forehead-zygomatic complex area and the periauricular area, it means that the pressure distribution is too large. In this case, the number of longitudinal support strips should be reduced and the degree of arc concavity should be increased. The mandibular area and the back of the neck are supported by the front crossbeam. If the strongest dark red area appears when testing the mandibular area and the back of the neck, it means 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, it is necessary to reduce the first angle and the distance between the front and rear crossbars; The distance between the front and rear beams was adjusted according to the ratio of the frontozygomatic complex area to the head length of the subject.

6. The method for 3D printing a customized pillow for side sleeping based on a three-dimensional human body model according to claim 1, characterized in that: The first angle is 0°-30°.

7. The method for 3D printing a customized pillow for side sleepers based on a three-dimensional human body model according to claim 1, characterized in that: In step S1.3, the turning point after the stable section of the dynamic curve is the neutral head weight value. Hneutral .

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