Waist cushion and 3d printing method thereof

Abstract

The invention provides a waist rest and a 3d printing method thereof, and the waist rest comprises a seat cushion part, a connecting part connected with the seat cushion part, a back cushion part connected with the other end of the connecting part, two convex edges symmetrically arranged on the seat cushion part, the connecting part and the back cushion part, buffer sleeves arranged on the back cushion part and the two convex edges, and a supporting part arranged at the bottom of the seat cushion part, according to the waist rest and the 3d printing method thereof, through the arrangement of the two protruding edges, when the cushion sleeve is assembled on the cushion part, an airflow channel is formed, a deformation space is provided for the cushion sleeve, and therefore when the waist of a user leans against the cushion sleeve, the cushion sleeve is not prone to falling off, and the waist of the user is not prone to falling off when the waist of the user leans against the cushion sleeve. The cushion collar deforms, the waist of the user is effectively supported, air at the waist of the user can be conveniently exchanged with external air through the airflow channel and the multiple air holes through the multiple air holes in the cushion collar, and the situation that the waist of the user is heated and sweats, and the use comfort is affected is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of lumbar vertebra care appliances, and in particular to a lumbar support and a 3D printing method thereof. Background Art

[0002] As people's lifestyles change, sitting for long periods of time has become the norm. Among them, poor sitting posture will cause various symptoms in people's bodies, such as: children - myopia, scoliosis, uneven shoulders, hunchbacks and affected bone growth; adults - cervical spondylosis, lumbar protrusion, spinal strain, sub-health and hemorrhoids.

[0003] Chairs are a type of furniture that is widely used in daily life and work. They usually include a base, backrest, support structure, armrests and other parts. In order to meet people's personalized needs and bring a more comfortable and healthy use experience, the structure and function of the chair are constantly improving. When users use chairs, they often rely on the base and backrest to support their hips and back, while the support for the waist is relatively weak. In order to provide support for the waist, a lumbar support is placed on the seat.

[0004] Existing lumbar supports generally use sponges as cushioning components to support the user's waist. However, the sponges will collapse when used for a long time, which will affect the supporting effect on the user's waist, and will become stuffy and affect the user's comfort when used for a long time. In addition, existing lumbar supports generally adopt one-piece injection molding, which requires prefabricated molds during production. The body data of different users are different, and different effects may occur when using the same form of lumbar support, which is not convenient for some users to meet their customized needs. Summary of the invention

[0005] The object of the present invention is to provide a lumbar support and a 3D printing method thereof to solve the above problems.

[0006] In order to achieve the above-mentioned object, the present invention provides a lumbar support, comprising: a cushion portion, a connecting portion connected to the cushion portion, a back cushion portion connected to the other end of the connecting portion, two protrusions symmetrically arranged on the cushion portion, the connecting portion and the back cushion portion, a cushion cover arranged on the back cushion portion and the two protrusions, a support member arranged at the bottom of the cushion portion, a plurality of fixing members installed on the cushion portion, a soft cushion connected to the cushion portion via the plurality of fixing members, and a heat dissipation component arranged on the cushion portion, the soft cushion, the back cushion portion and the cushion cover; The cushion portion has an upwardly protruding portion at one end away from the connecting portion, the protruding portion extends in an arc shape to both sides, and the cushion is provided with an adapting portion adapted to the protruding portion, wherein The support member is suitable for improving the stability of the cushion portion when placed in a flat position; The fixing member is suitable for completing the detachable connection between the cushion and the seat cushion portion; The heat dissipation component is suitable for ensuring the ventilation effect of the seat cushion part and the back cushion part.

[0007] Further, the heat dissipation component includes a plurality of air holes arranged on the front side of the buffer sleeve, a through groove arranged on the rear side of the buffer sleeve, a movable groove arranged on the cushion portion, an air flow channel arranged between the buffer sleeve, the cushion portion and the two convex edges, a plurality of arc-shaped support rods fixed in the movable groove, a plurality of heat dissipation grooves arranged on the soft cushion and the seat cushion portion, and a plurality of transverse grooves arranged on the bottom of the seat cushion portion; The curvature of the plurality of arc-shaped support rods is greater than the curvature of the cushion portion.

[0008] Furthermore, the support member includes an assembly block connected to the bottom of the seat cushion, a plurality of installation grooves respectively provided on a plurality of the assembly blocks, and a plurality of rubber pads bonded in the plurality of the installation grooves.

[0009] Further, the fixing member includes an assembly groove opened on the soft cushion, connecting grooves opened on the cushion part and corresponding to the assembly groove, connecting rods arranged in the assembly groove and the connecting groove, limiting blocks fixedly connected to the top of the connecting rod, a plurality of fixing blocks fixedly connected to the bottom of the connecting rod in an annular array, and a plurality of wedge-shaped clamping blocks fixed to the bottom of the plurality of fixing blocks; The height of the limit block is smaller than the height of the assembly groove; A plurality of the wedge-shaped blocks are in contact with the cushion portion.

[0010] Furthermore, a plurality of reinforcing ribs are provided on the front side of the connecting portion.

[0011] Furthermore, a silicone pad is bonded to the rear side of the connecting portion.

[0012] Furthermore, a recessed portion is provided at the upper end of the cushion portion, and a lifting groove is provided at the upper end of the buffer sleeve.

[0013] Furthermore, the material of the soft cushion is memory foam or TPE gel material.

[0014] Furthermore, the cushion portion, the connecting portion, the back cushion portion and the plurality of arc-shaped support rods are integrally formed.

[0015] A 3D printing method for a waist support comprises the following steps: S1. Determine the structural arrangement and size data of the seat cushion, the connection part, the back cushion and the cushion cover according to the general human body data, and create a three-dimensional model; or design the corresponding structural arrangement and size data according to the target customer's body data, and create a three-dimensional model; S2. Save the model after digital design operation as an STL format file, then import the model file into the 3D printing pre-processing software to generate the support structure to obtain the support file, adjust the printing parameters, and then copy the model file to the 3D printer; S3, select the required 3D printing granular material, input it into the 3D printer, and set the parameters of the printer. According to the data of S2, the seat cushion part, the connecting part, and the back cushion part are integrally formed by 3D printing, and the buffer cover is printed separately; S4. After printing is completed, take out all the models and use sandpaper to polish the remaining supports after printing the models; S5, assembling the buffer cover and the cushion part; the lumbar support is printed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The lumbar support and the 3D printing method thereof, through the plurality of ventilation holes provided on the cushion cover, make the cushion cover have strong deformation ability while having effective hard support, and can make the cushion cover produce appropriate deformation when the user resists the cushion cover, so as to effectively support the user's waist, ensure the support effect of the user's waist, and effectively correct the user's sitting posture, and through the plurality of ventilation holes provided on the cushion cover, in conjunction with the air flow holes between the front side of the cushion cover and the cushion part and the two convex edges, it is convenient for the outside air to circulate with the air at the contact position between the user's waist and the cushion cover, thereby effectively dissipating the heat at the user's waist support, and ensuring the comfort of the user when sitting for a long time; The lumbar support and its 3D printing method use a specific material formula to perform 3D printing on the seat cushion, back cushion and connecting part to form an integrated whole, which effectively increases the supporting strength of the seat cushion, back cushion and connecting part, and will not cause deformation and damage during long-term use. The buffer part is 3D printed separately to ensure that the buffer sleeve 5 has good toughness, ensure support for the user's waist, and facilitate replacement of the buffer part after damage. The processing and production through 3D printing is convenient for design and production based on the user's body data, meeting the customization needs of some users, ensuring the user's comfort, and strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 A perspective view of the present invention is shown; Figure 2 A cross-sectional view of the present invention is shown; Figure 3 The partial upward stereoscopic view of the present invention is shown. Figure 1 ; Figure 4 Shows an exploded perspective view of the present invention; Figure 5 A partial cutaway view of the present invention is shown; Figure 6 The partial upward stereoscopic view of the present invention is shown. Figure 2 ; Figure 7 The present invention is shown Figure 6 Enlarged view of point A.

[0019] In the figures, the same reference numerals denote the same structural elements, wherein: 1. Cushion part; 2. Connecting part; 3. Cushion part; 4. Raised edge; 5. Buffer sleeve; 6. Support part; 7. Fixing part; 8. Cushion; 9. Heat dissipation component; 10. Raised part; 11. Adapter part; 12. Air vent; 13. Through groove; 14. Movable groove; 15. Air flow channel; 16. Arc-shaped support rod; 17. Heat dissipation groove; 18. Horizontal groove; 19. Assembly block; 20. Installation groove; 21. Rubber pad; 22. Assembly groove; 23. Connection groove; 24. Connecting rod; 25. Limit block; 26. Fixing block; 27. Wedge-shaped block; 28. Reinforcement rib; 29. ​​Silicone pad; 30. Recessed part; 31. Lifting groove. DETAILED DESCRIPTION

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0021] See also Figure 1 , Figure 1 A perspective view of the present invention is shown; see Figure 2 , Figure 2 A cross-sectional view of the present invention is shown; see Figure 3 , Figure 3 The partial upward stereoscopic view of the present invention is shown. Figure 1 ; see Figure 4 , Figure 4 Shows an exploded perspective view of the present invention; see Figure 5 , Figure 5 A partial cutaway view of the present invention is shown; see Figure 6 , Figure 6 The partial upward stereoscopic view of the present invention is shown. Figure 2 ; see Figure 7 , Figure 7 The present invention is shown Figure 6 A magnified picture of Figure 1-7As shown, a lumbar support comprises: a cushion portion 1, a connecting portion 2 connected to the cushion portion 1, a back cushion portion 3 connected to the other end of the connecting portion 2, two flanges 4 symmetrically arranged on the cushion portion 1, the connecting portion 2 and the back cushion portion 3, a cushion cover 5 arranged on the back cushion portion 3 and the two flanges 4, a support member 6 arranged at the bottom of the cushion portion 1, a plurality of fixing members 7 installed on the cushion portion 1, a soft cushion 8 connected to the cushion portion 1 through the plurality of fixing members 7, and a heat dissipation component 9 arranged on the cushion portion 1, the soft cushion 8, the back cushion portion 3 and the cushion cover 5; The cushion portion 1 has a protruding portion 10 protruding upward at one end away from the connecting portion 2, and the protruding portion 10 extends in an arc shape to both sides. The cushion 8 is provided with an adapting portion 11 adapted to the protruding portion 10, wherein The support member 6 is suitable for improving the stability of the cushion portion 1 when placed in a flat position; The fixing member 7 is suitable for completing the detachable connection between the cushion 8 and the seat cushion part 1; The heat dissipation component 9 is suitable for ensuring the ventilation effect of the seat cushion part 1 and the back cushion part 3. When in use, the cushion cover 5 and the back cushion part 3 are assembled. Through the set of several fixing parts 7, the connection between the cushion 8 and the seat cushion part 1 can be completed in a detachable and quick assembly manner, and the removal of the cushion 8 on the seat cushion part 1 is convenient. Then, when the ambient temperature changes, the cushion 8 can be quickly replaced to ensure good applicability and improve the comfort of the user when sitting on the seat cushion part 1. When the cushion 8 is used for a long time and stains appear, the cushion 8 can be quickly disassembled for cleaning, avoiding the need to replace the cushion 8 with the seat cushion. The support member 6 is provided to support and level the cushion portion 1 when it is in use, so that the cushion portion 1 is not easy to shake after being placed and used, and the stability of the lumbar support when in use is effectively improved to prevent the user from shaking when using the lumbar support, which affects the user's sitting posture, and effectively corrects the user's sitting posture under the action of the provided ridges 10, and the rubber pads 21 on the support member 6 can increase the friction between the cushion portion 1 and the use position, so as to prevent the user from sliding when using the lumbar support, and at the same time, the rubber pads 21 prevent the cushion portion 1 and the use position of the lumbar support from being worn; and The user sits on the cushion 8 and makes the waist contact with the cushion cover 5. Through the heat dissipation component 9, since the front side of the cushion cover 5 is provided with a plurality of air holes 12, the front side of the cushion cover 5 has good deformation ability while ensuring effective support effect. At the same time, since the cushion cover 5 cooperates with the two convex edges 4 to form an air flow channel 15, an effective deformation space is provided for the cushion cover 5. When the user's waist contacts the cushion cover 5, the cushion cover 5 will be squeezed to deform, so that the contact part between the cushion cover 5 and the user's waist becomes concave, and then perfectly fits the user's waist, so that the user's waist is erected and protected. The user can maintain a correct sitting posture, support the user's waist, and ensure the user's sitting comfort; the heat dissipation component 9 provided at the same time can make the user sit on the seat cushion part 1 and lean on the buffer part with good heat dissipation and ventilation effect, and prevent the user from using it for a long time, causing the buttocks and waist to heat up and sweat, which affects the user's comfort; the seat cushion part 1, the back cushion part 3 and the connecting part 2 are integrally formed by 3D printing, and the material formula is selected to increase the supporting strength of the seat cushion part 1, the back cushion part 3 and the connecting part 2, and long-term use will not cause deformation and damage, and at the same time ensure that the buffer cover 5 has good toughness to ensure support for the user's waist.

[0022] Optionally, the heat dissipation component 9 includes a plurality of air holes 12 arranged on the front side of the buffer sleeve 5, a through groove 13 opened on the rear side of the buffer sleeve 5, a movable groove 14 opened on the cushion portion 3, an air flow channel 15 arranged between the buffer sleeve 5, the cushion portion 3 and the two convex edges 4, a plurality of arc-shaped support rods 16 fixed in the movable groove 14, a plurality of heat dissipation grooves 17 opened on the soft pad 8 and the seat cushion portion 1, and a plurality of transverse grooves 18 opened on the bottom of the seat cushion portion 1; The curvature of the arc-shaped support rods 16 is greater than that of the cushion portion 3. When the user sits on the cushion portion 1 and makes the user's waist press against the cushion cover 5, pressure is generated on the cushion cover 5. Since the cushion cover 5 is provided with a plurality of air vents 12, the cushion cover 5 has a certain hardness and good toughness, so that when the user's waist presses against the cushion cover 5, the cushion cover 5 will be deformed. The position where the cushion cover 5 and the user's waist are pressed against are concave, which can wrap and support the user's waist, fit the user's waist curve, and effectively support both sides of the user's waist. Since the curvature of the arc-shaped support rods 16 is greater than that of the cushion portion 3, the relative distance between the front side of the cushion cover 5 and the front side of the cushion portion 3 is increased, the deformation space of the front side of the cushion cover 5 is increased, and it is convenient for the cushion cover 5 to The invention provides support for the user's waist; at the same time, due to the provision of the convex edge 4, an air flow channel 15 is left between the cushion cover 5 and the cushion part 3, and then through the plurality of air holes 12 provided on the cushion cover 5, it is convenient to dissipate heat to the part of the user's waist that fits the cushion cover 5, and with the cooperation of the movable groove 14 and the through groove 13, the circulation effect of air in the air flow channel 15 is effectively guaranteed, and the heat dissipation effect of the user's waist is further guaranteed; and through the plurality of heat dissipation grooves 17 provided on the soft pad 8 and the seat cushion part 1, it is convenient to dissipate heat to the user's buttocks, and the provision of a plurality of transverse grooves 18 can effectively improve the circulation effect between the plurality of heat dissipation grooves 17 and the outside air, and increase the heat dissipation effect of the plurality of heat dissipation grooves 17 on the user's buttocks, thereby avoiding the user's buttocks and waist from heating up and sweating when using the lumbar support for a long time, which affects the comfort of use.

[0023] Optionally, the support member 6 includes an assembly block 19 connected to the bottom of the seat cushion, a plurality of mounting grooves 20 respectively provided on a plurality of the assembly blocks 19, and a plurality of rubber pads 21 bonded into the plurality of mounting grooves 20. When the user uses the lumbar support, the plurality of assembly blocks 19 can maintain the levelness of the seat cushion portion 1, thereby making the lumbar support more stable during use, and the plurality of rubber pads 21 bonded into the plurality of mounting grooves 20 can prevent the plurality of assembly blocks 19 from being scratched against the placement position of the lumbar support.

[0024] Optionally, the fixing member 7 includes an assembly groove 22 provided on the cushion 8, connection grooves 23 respectively provided on the cushion portion 1 and corresponding to the assembly groove 22, a connecting rod 24 provided in the assembly groove 22 and the connection groove 23, a limiting block 25 respectively fixedly connected to the top of the connecting rod 24, a plurality of fixing blocks 26 respectively fixedly connected to the bottom of the connecting rod 24 in an annular array, and a plurality of wedge-shaped clamping blocks 27 respectively fixed to the bottom of the plurality of fixing blocks 26; The height of the limit block 25 is smaller than the height of the assembly groove 22; The plurality of wedge-shaped blocks 27 are all in contact with the cushion portion 1. When the seasons change, the temperature changes, or stains appear on the cushion 8 and cleaning is required, the plurality of wedge-shaped blocks 27 can be pressed, and the plurality of fixing blocks 26 are deformed and contact the plurality of wedge-shaped blocks 27 and the cushion portion 1. At this time, the plurality of wedge-shaped blocks 27 are pushed upward, so that the limit block 25 connecting rod 24, the limit block 25, the plurality of wedge-shaped blocks 27 and the plurality of fixing blocks 26 can be pushed out from the assembly groove 22 and the connecting groove 23, and then the connection between the cushion 8 and the cushion portion 1 can be released by controlling the plurality of fixing members 7, so that the removed cushion 8 can be replaced or cleaned. When the new cushion 8 is installed, the bottom of the cushion 8 is attached to the upper surface of the cushion portion 1, and the corresponding fixing members 7 are made to contact the upper surface of the cushion portion 1. The assembly groove 22 and the connecting groove 23 are at the same central axis. At this time, pressing the limit rod to enter the assembly groove 22 can make the connecting rod 24 drive the plurality of fixing blocks 26 and the plurality of wedge-shaped blocks 27 to enter the connecting groove 23 and deform. Until the plurality of wedge-shaped blocks 27 reach the bottom of the cushion portion 1, the plurality of fixing blocks 26 are reset, so that the plurality of wedge-shaped blocks 27 are all against the bottom of the cushion portion 1, completing the restricted installation of the cushion 8; the plurality of fixing members 7 are provided to facilitate the installation and disassembly of the cushion 8, and thus facilitate the cleaning and replacement of the cushion 8, and the height of the limit block 25 is less than the height of the assembly groove 22, so that when the user sits on the cushion 8, the limit block 25 is not easy to contact the user, thereby effectively improving the comfort of the user sitting on the cushion 8.

[0025] Optionally, a plurality of reinforcing ribs 28 are provided on the front side of the connecting portion 2. When the cushion portion 3 abuts against the user's waist, the waist will give a reverse force to the cushion portion 1, causing the connecting portion 2 to deform. The plurality of reinforcing ribs 28 can enhance the tensile strength of the connecting portion 2 and prevent the connecting portion 2 from being damaged during use, thereby extending the service life of the entire lumbar support.

[0026] Optionally, a silicone pad 29 is bonded to the back side of the connecting part 2. When the user places the lumbar support on some fabrics with poor wear resistance, and when the user is in a relatively lying sitting position, it is easy to shake, and the connecting part 2 will be against the fabric. The provided silicone pad 29 can prevent the connecting part 2 from causing wear to the fabric during movement, thereby avoiding affecting the service life of the fabric in the user's lying position when the user uses the lumbar support.

[0027] Optionally, a recessed portion 30 is provided at the upper end of the cushion portion 3, and a pulling groove 31 is opened at the upper end of the buffer sleeve 5. After the buffer sleeve 5 and the cushion portion 3 are spliced ​​together, the pulling groove 31 and the recessed portion 30 form a through groove 13, so that the user can reinforce the hand to go deep into the pulling groove 31 and the recessed portion 30 to move the lumbar support, which is convenient to use.

[0028] Optionally, the material of the soft pad 8 is memory foam or TPE gel material. Since the soft pad 8 can be disassembled and assembled with the seat cushion part 1 by the fixing part 7, the soft pad 8 made of TPE gel material can be fixed on the seat cushion part 1 for use when the weather is hot. Since the TPE gel material has a soft and smooth texture and a skin-close touch, the coolness of the lumbar support when the user uses it in hot weather is effectively improved. When the weather is cold, the soft pad 8 made of memory foam can be fixed on the seat cushion part 1 for use, which effectively improves the comfort of the user using the lumbar support when the weather is cold.

[0029] Optionally, the cushion portion 1, the connecting portion 2, the back cushion portion 3 and the plurality of arc-shaped support rods 16 are integrally formed. The integrally formed cushion portion 1, the connecting portion 2, the back cushion portion 3 and the plurality of arc-shaped support rods 16 effectively ensure the overall strength of the lumbar support and ensure the service life of the lumbar support.

[0030] A 3D printing method for a waist support comprises the following steps: S1. Determine the structural arrangement and size data of the cushion portion 1, the connecting portion 2, the back cushion portion 3 and the cushion cover 5 according to the general human body data, and create a three-dimensional model; or design the corresponding structural arrangement and size data according to the target customer's body data, and create a three-dimensional model; S2. Save the model after digital design operation as an STL format file, then import the model file into the 3D printing pre-processing software to generate the support structure to obtain the support file, adjust the printing parameters, and then copy the model file to the 3D printer; S3, select the required 3D printing granular material, input it into the 3D printer, and set the parameters of the printer. According to the data in S2, the seat cushion part 1, the connecting part 2, and the back cushion part 3 are integrally formed by 3D printing, and the buffer cover 5 is printed separately; S4. After printing is completed, take out all the models and use sandpaper to polish the remaining supports after printing the models; S5, assembling the buffer cover 5 and the cushion part 3; the lumbar support printing is completed.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lumbar support, characterized in that: include: A cushion portion (1), a connecting portion (2) connected to the cushion portion (1), a back cushion portion (3) connected to the other end of the connecting portion (2), two protruding edges (4) symmetrically arranged on the cushion portion (1), the connecting portion (2) and the back cushion portion (3), a cushion cover (5) arranged on the back cushion portion (3) and the two protruding edges (4), a support member (6) arranged at the bottom of the cushion portion (1), a plurality of fixing members (7) mounted on the cushion portion (1), a soft cushion (8) connected to the cushion portion (1) via the plurality of fixing members (7), and a heat dissipation member (9) arranged on the cushion portion (1), the soft cushion (8), the back cushion portion (3) and the cushion cover (5); The cushion portion (1) has a protruding portion (10) protruding upward at one end away from the connecting portion (2), the protruding portion (10) extending in an arc shape to both sides, and the cushion (8) is provided with an adapting portion (11) adapted to the protruding portion (10), wherein The support member (6) is suitable for improving the stability of the cushion portion (1) when placed in a flat position; The fixing member (7) is suitable for completing the detachable connection between the soft cushion (8) and the seat cushion portion (1); The heat dissipation component (9) is suitable for ensuring the ventilation effect of the seat cushion portion (1) and the back cushion portion (3).

2. A lumbar support as claimed in claim 1, characterized in that: The heat dissipation component (9) includes a plurality of air holes (12) arranged on the front side of the buffer sleeve (5), a through groove (13) provided on the rear side of the buffer sleeve (5), a movable groove (14) provided on the cushion portion (3), an air flow channel (15) provided between the buffer sleeve (5), the cushion portion (3) and the two convex edges (4), a plurality of arc-shaped support rods (16) fixed in the movable groove (14), a plurality of heat dissipation grooves (17) provided on the soft cushion (8) and the seat cushion portion (1), and a plurality of transverse grooves (18) provided on the bottom of the seat cushion portion (1); The curvature of the plurality of arc-shaped support rods (16) is greater than the curvature of the cushion portion (3).

3. A lumbar support as claimed in claim 2, characterized in that: The support member (6) comprises an assembly block (19) connected to the bottom of the seat cushion, a plurality of installation grooves (20) respectively provided on a plurality of the assembly blocks (19), and a plurality of rubber pads (21) bonded into the plurality of the installation grooves (20).

4. A lumbar support as claimed in claim 3, characterized in that: The fixing member (7) comprises an assembly groove (22) provided on the cushion (8), connection grooves (23) respectively provided on the cushion portion (1) and corresponding to the assembly groove (22), a connecting rod (24) provided in the assembly groove (22) and the connection groove (23), a limiting block (25) respectively fixedly connected to the top of the connecting rod (24), a plurality of fixing blocks (26) respectively fixedly connected to the bottom of the connecting rod (24) in an annular array, and a plurality of wedge-shaped clamping blocks (27) respectively fixed to the bottom of the plurality of fixing blocks (26); The height of the limit block (25) is smaller than the height of the assembly groove (22); The plurality of wedge-shaped clamping blocks (27) are all in contact with the cushion portion (1).

5. A lumbar support as claimed in claim 4, characterized in that: A plurality of reinforcing ribs (28) are provided on the front side of the connecting portion (2).

6. A lumbar support as claimed in claim 5, characterized in that: A silicone pad (29) is bonded to the rear side of the connecting portion (2).

7. A lumbar support as claimed in claim 2, characterized in that: The upper end of the cushion portion (3) is provided with a recessed portion (30), and the upper end of the buffer sleeve (5) is provided with a lifting groove (31).

8. A lumbar support as claimed in claim 7, characterized in that: The material of the soft cushion (8) is memory foam or TPE gel material.

9. A lumbar support as claimed in claim 8, characterized in that The seat cushion portion (1), the connecting portion (2), the back cushion portion (3) and the plurality of arc-shaped support rods (16) are integrally formed.

10. A 3D printing method for a waist support, characterized in that: include: S1. Determine the structural arrangement and dimension data of the seat cushion portion (1), the connecting portion (2), the back cushion portion (3) and the cushion cover (5) based on general human body data, and create a three-dimensional model; or individually design the corresponding structural arrangement and dimension data based on the body data of the target customer, and create a three-dimensional model; S2. Save the model after digital design operation as an STL format file, then import the model file into the 3D printing pre-processing software to generate the support structure to obtain the support file, adjust the printing parameters, and then copy the model file to the 3D printer; S3, selecting the required 3D printing granular material, inputting it into the 3D printer, and setting the parameters of the printer. According to the data in S2, the seat cushion part (1), the connecting part (2), and the back cushion part (3) are integrally formed by 3D printing, and the buffer cover (5) is printed separately; S4. After printing is completed, take out all the models and use sandpaper to polish the remaining supports after printing the models; S5, assembling the buffer cover (5) and the cushion part (3); the lumbar support is printed.

Images