CN111227419A - Helmet liner, manufacturing method thereof and helmet - Google Patents
Helmet liner, manufacturing method thereof and helmet Download PDFInfo
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- CN111227419A CN111227419A CN202010044883.1A CN202010044883A CN111227419A CN 111227419 A CN111227419 A CN 111227419A CN 202010044883 A CN202010044883 A CN 202010044883A CN 111227419 A CN111227419 A CN 111227419A
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- unit cell
- cell structure
- helmet
- helmet liner
- cell
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- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/06—Impact-absorbing shells, e.g. of crash helmets
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- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/28—Ventilating arrangements
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- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42C—MANUFACTURING OR TRIMMING HEAD COVERINGS, e.g. HATS
- A42C2/00—Manufacturing helmets by processes not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Helmets And Other Head Coverings (AREA)
Abstract
The invention provides a helmet liner, a manufacturing method thereof and a helmet, wherein the helmet liner comprises a cell layer, the cell layer comprises a plurality of cell structures which are mutually connected, each cell structure is a polyhedron structure comprising a plurality of edges, any two adjacent cell structures are in face connection, and all the edges on the connection face between any two adjacent cell structures are shared by the two adjacent cell structures. Due to the arrangement, the impact external force is transmitted to the head of a human body along the edge of the unit cell structure, and the elastic/plastic deformation of the unit cell structure can remarkably play a role in buffering, so that the safety of a user can be effectively ensured; and a large amount of space gaps exist in the cell structure, so that a good ventilation effect can be realized; because the cell structure has better overall plasticity, the inner wall of the cell structure can be slightly deformed, so that the joint area of the inner wall and the head is larger, the comfort is improved, the pressure of the head under the impact action can be obviously reduced, and the safety is improved.
Description
Technical Field
The invention relates to the technical field of sports equipment, in particular to a helmet liner, a manufacturing method thereof and a helmet.
Background
Along with higher, faster and stronger Olympic spiritual calling, and the continuous expansion of the breadth and depth of national fitness. The sports protection equipment becomes a necessary product for ensuring that people continuously break through sports limits and guaranteeing sports safety. Among them, the safety helmet is mainly used as safety protection equipment indispensable to sports such as skiing, skating, roller skating, and cycling, and the safety of the safety helmet is mainly embodied in preventing penetration of external foreign objects and buffering external impact. In the prior art, the main structural form of the sports helmet comprises two parts: a shell and an inner container. The shell has certain strength and mainly prevents foreign bodies from penetrating into the shell; the inner container mainly plays a role in buffering and energy absorption, and absorbs external impact energy as much as possible so as to reduce the acceleration (impact action) of the head. The current motion helmet inner bag adopts EPS expanded material whole to mould plastics mostly and makes, and EPS expanded material shock resistance is limited in the unit volume, unsatisfied motion helmet high performance, lightweight actual demand to its gas permeability is relatively poor, is unfavorable for the sweat when motion to be discharged. Therefore, it is an urgent need to solve the problem of the prior art that the helmet has poor cushioning performance and poor air permeability.
Disclosure of Invention
The invention aims to provide a helmet liner which can improve the buffer performance, air permeability and comfort of a helmet and reduce the weight of the helmet.
In order to solve the above problems, the present invention provides a helmet liner, including a cell layer, where the cell layer includes a plurality of cell structures connected to each other, each cell structure is a polyhedron structure including a plurality of edges, any two adjacent cell structures are connected to each other, all the edges on a connection surface between any two adjacent cell structures are shared by the two adjacent cell structures, the cell layer forms a shell structure for wrapping a head of a human body, and an opening for the head of the human body to extend into is formed in the cell layer.
Preferably, each of the unit cell structures is a hexahedral structure.
Preferably, the unit cell structure includes a plurality of first strengthening ribs, each the first end mutual fixed connection of first strengthening rib, each the second end of first strengthening rib respectively with the different summit fixed connection of unit cell structure, and/or, the unit cell structure includes a plurality of second strengthening rib, each the first end mutual fixed connection of second strengthening rib, each the second end of second strengthening rib respectively with the difference of unit cell structure edge fixed connection.
Preferably, the unit cell structure further includes a plurality of third reinforcing ribs, first ends of the third reinforcing ribs are fixedly connected to each other, and second ends of the third reinforcing ribs are respectively and fixedly connected to second ends of corresponding third reinforcing ribs of adjacent unit cell structures.
Preferably, the density of the unit cell structure at the position of the unit cell layer opposite to the sensitive part of the human brain is greater than the density of the unit cell structure at other positions of the unit cell layer.
Preferably, at a position of the unit cell layer opposite to a sensitive part of a human brain, the cross-sectional dimension of the edge of the unit cell structure is larger than that of the edge of the unit cell structure at other positions of the unit cell layer.
The invention also provides a manufacturing method of the helmet liner, which is manufactured by the 3D printing technology.
Preferably, the helmet liner is made of a tpu material and is manufactured by a laser selective cladding material adding technology.
The invention also provides a helmet, which comprises an outer shell and a helmet liner arranged in the outer shell, wherein the helmet liner is any one of the helmet liners.
In the technical scheme provided by the invention, the helmet liner comprises a cell layer, wherein the cell layer comprises a plurality of cell structures which are mutually connected, each cell structure is a polyhedron structure comprising a plurality of edges, any two adjacent cell structures are connected in a face-to-face manner, all the edges on the connecting face between any two adjacent cell structures are shared by the two adjacent cell structures, the cell layer forms a shell structure for wrapping the head of a human body, and an opening for the head of the human body to stretch into is arranged on the cell layer. According to the arrangement, under the action of external impact, external force is transmitted from the part in contact with the helmet shell to the part in contact with the head of a human body along the edge of the unit cell structure until the external force is transmitted to the head of the human body, and the elastic/plastic deformation of the unit cell structure can remarkably play a role in buffering, so that the impact of the external force on the head of the human body can be reduced, and the safety of a user is effectively ensured; in addition, a large number of space gaps exist in the cell structure, so that a good ventilation effect can be realized, sweat of a user can be discharged, and the head of the user can be kept dry and comfortable; because the cell structure has better overall plasticity, the inner wall of the cell structure can be slightly deformed, so that the joint area of the inner wall and the head is larger, the comfort is improved, the pressure of the head under the impact action can be obviously reduced, and the safety is improved.
According to the technical scheme, the helmet liner is manufactured through a 3D printing technology. So set up, can be according to human head shape design helmet inner bag, the manufacturing of helmet inner bag is accomplished through 3D printing technique to the back of modelling, and helmet inner bag's manufacturing error is littleer to can make the human head of helmet inner bag laminating better, make the user wear more comfortablely, and helmet inner bag does not have the seam, and helmet inner bag's wholeness can be better, and intensity is higher.
According to the technical scheme provided by the invention, the helmet comprises a shell and a helmet liner arranged in the shell, wherein the helmet liner is any one of the helmet liners. By the arrangement, the shell can prevent hard objects such as sharp stones, branches and the like from penetrating into the helmet to cause injury to a user; the helmet liner can transmit external force generated by impact from the part in contact with the helmet shell to the direction in contact with the head of a human body along the edge of the unit cell structure until the external force is transmitted to the head of the human body, and the elastic/plastic deformation of the unit cell structure can remarkably play a role in buffering, so that the impact of the external force on the head of the human body can be reduced, and the safety of a user is effectively ensured; in addition, a large number of space gaps exist in the cell structure, so that a good ventilation effect can be realized, sweat of a user can be discharged, and the head of the user can be kept dry and comfortable; because the cell structure has better overall plasticity, the inner wall of the cell structure can be slightly deformed, so that the joint area of the inner wall and the head is larger, the comfort is improved, the pressure of the head under the impact action can be obviously reduced, and the safety is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the inner tube of the helmet of the present invention;
FIG. 2 is a schematic structural view of a helmet according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a cell layer according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the connection between cell structures in a first embodiment of the present invention;
FIG. 5 is a schematic diagram of the connection between cell structures in a second embodiment of the present invention;
FIG. 6 is a schematic diagram of the connection between the cell structures in the third embodiment of the present invention
FIG. 7 is a schematic structural view of a third reinforcing rib according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a cell structure according to a first embodiment of the present invention;
fig. 9 is a schematic diagram of a cell structure in a second embodiment of the present invention.
In fig. 1-9:
1. a unit cell structure; 2. an edge; 3. a first reinforcing rib; 4. a second reinforcing rib; 5. a third reinforcing rib; 6. a top edge; 7. a housing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
This implementation provides a can promote buffer performance, gas permeability and the travelling comfort of helmet and reduce helmet weight's helmet inner bag.
Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the invention recited in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to fig. 1 to 9, an embodiment of the present invention provides a helmet liner, which includes a cell layer. The cell layer comprises a plurality of interconnected cell structures 1, each cell structure 1 being a polyhedral structure comprising a plurality of edges 2. Any two adjacent unit cell structures 1 are connected in a surface mode, and all edges 2 on the connecting surface between any two adjacent unit cell structures 1 are shared by the two adjacent unit cell structures 1. The cell layer forms a shell structure for wrapping the head of a human body, and an opening for the head of the human body to extend into is arranged on the cell layer. Alternatively, the number of unit cell layers may be one or more. In the structure of the multi-layer cell layer, any two adjacent cell layers may be connected by the connection between two corresponding cell structures 1, and the connection between two corresponding cell structures 1 between a cell layer and a cell layer may be the same as the connection between two adjacent cell structures 1 in a cell layer.
With the arrangement, under the action of external impact, external force is transmitted from the part in contact with the helmet shell 7 to the part in contact with the head of a human body along the edge 2 of the unit cell structure 1 until the external force is transmitted to the head of the human body, and the elastic/plastic deformation of the unit cell structure 1 can remarkably play a role in buffering, so that the impact of the external force on the head of the human body can be reduced, and the safety of a user is effectively ensured; in addition, a large number of space gaps exist in the cell structure 1, so that a good ventilation effect can be realized, sweat of a user can be discharged, and the head of the user can be kept dry and comfortable; because the unit cell structure 1 has better overall plasticity, the inner wall of the unit cell structure can be slightly deformed, so that the joint area of the inner wall and the head is larger, the comfort is improved, the pressure of the head under the impact action can be obviously reduced, and the safety is improved.
In some embodiments, each unit cell structure 1 is a hexahedral structure. So configured, the structure of the unit cell structure 1 is simpler. Referring to fig. 4, the connection relationship between the cell structure 1 in the middle of the figure and the cell structure 1 above is described as an example, and the connection relationship between the other cell structures 1 is the same. The top surface of the middle cell structure 1 coincides with the bottom surface of the upper cell structure 1, and now four edges of the top surface of the middle cell structure 1 are defined as top edges 6, so the four top edges 6 are shared by the cell structure 1 above the middle cell structure 1 and the middle cell structure 1. I.e. the four top edges 6 form both the top side of the middle cell structure 1 and the bottom side of the upper cell structure 1. Referring to fig. 1 and 2, each cell structure 1 may have its own length of some or all of the edges 2 and the angle between adjacent edges 2 varied as desired, for example, to better fit the human head.
Referring to fig. 5 and 6, in some embodiments, the cell structure 1 further includes a plurality of first reinforcing ribs 3, first ends of the first reinforcing ribs 3 are fixedly connected to each other, and second ends of the first reinforcing ribs 3 are fixedly connected to different vertices of the cell structure 1. Alternatively, the first end of each first reinforcing rib 3 is connected to the unit cell structure 1 at a central position thereof. The unit cell structure 1 may further include a plurality of second reinforcing ribs 4, first ends of the second reinforcing ribs 4 are fixedly connected to each other, and second ends of the second reinforcing ribs 4 are fixedly connected to different edges 2 of the unit cell structure 1, respectively. Alternatively, the first ends of the second ribs 4 are connected to the central position of the unit cell structure 1, and the second ends of the second ribs 4 are connected to the middle points of the respective edges 2. With this arrangement, the strength of the cell structure 1 can be increased, and thus the strength of the cell layer can be increased, and for example, the first reinforcing rib 3 and/or the second reinforcing rib 4 can be provided at the cell structure 1 at a position where the cell layer corresponds to a sensitive region of the human head, such as the vicinity of the temple, the vicinity of the hindbrain, and the vicinity of the brain stem, to enhance the strength and cushioning properties of the cell layer at the above-mentioned position, thereby protecting these regions from a large impact.
Referring to fig. 5 and 8, in other embodiments, the unit cell structure 1 is provided with eight first reinforcing ribs 3, and the second ends of the eight first reinforcing ribs 3 correspond to eight vertices of the unit cell structure 1 one by one, but it is also possible to provide less than eight first reinforcing ribs 3 according to specific structural or strength requirements, so as to simplify the structure of the helmet liner and reduce the weight of the helmet liner. Similarly, referring to fig. 6 and 9, twelve second reinforcing ribs 4 may be disposed on the unit cell structure 1, and the second ends of the twelve second reinforcing ribs 4 correspond to twelve edges of the unit cell structure one to one, and certainly, less than twelve second reinforcing ribs 4 may be disposed according to specific structure or strength requirement, so as to simplify the structure of the helmet liner and reduce the weight of the helmet liner.
Referring to fig. 7, in some embodiments, the cell structure 1 further includes a plurality of third reinforcing ribs 5, first ends of the third reinforcing ribs 5 are fixedly connected to each other, and second ends of the third reinforcing ribs 5 are fixedly connected to second ends of corresponding third reinforcing ribs 5 of adjacent cell structures 1. For example, referring to fig. 7, the third reinforcing rib 5 located at the upper portion inside the middle cell structure 1 is fixedly connected to the third reinforcing rib 5 located at the lower portion inside the upper cell structure 1. The first ends of the respective third reinforcing beads 5 may be connected to the first ends of the respective first reinforcing beads 3 at the connection position, or may be connected to the first ends of the respective second reinforcing beads 4 at the connection position. With this arrangement, the strength of the cell structure 1 can be increased, and thus the strength of the cell layer can be increased, and for example, the third reinforcing ribs 5 can be provided at the cell structure 1 at the positions corresponding to sensitive regions of the human head, such as the vicinity of the temple, the vicinity of the hindbrain, and the vicinity of the brain stem, to enhance the strength and cushioning properties of the cell layer at the positions, and thus protect these regions of the human head from a large impact. Alternatively, the number of the third reinforcing ribs 5 may be six, and of course, fewer than six third reinforcing ribs 5 may be provided according to specific structure or strength requirement, so as to simplify the structure of the helmet liner and reduce the weight of the helmet liner.
In some embodiments, the density of cell structure 1 at the location of the cell layer opposite the sensitive part of the human brain is greater than the density of cell structure 1 at other locations of the cell layer. The sensitive parts of the human brain, i.e. the sensitive areas near the temple, the hindbrain, the brainstem, etc., increase the density of the cell structures 1, i.e. increase the number of cell structures 1 per unit volume, and increase the density of the cell structures 1 can be achieved by reducing the length of the edge 2 of the cell structure 1 at that location. So set up, can increase the area of contact of helmet inner bag and human head on the one hand for it is more comfortable when the user wears the helmet, and on the other hand can further strengthen the intensity of cell layer and the position department that this position corresponds, and the protection user avoids huge impact.
In some embodiments, the cross-sectional dimension of the edge 2 of the cell structure 1 at the location of the cell layer opposite to the sensitive part of the human brain is larger than the cross-sectional dimension of the edge 2 of the cell structure 1 at other locations of the cell layer. For example, the edge 2 may be a cylindrical edge 2, and the diameter of the edge 2 of the cell structure 1 at the position where the cell layer is opposite to the sensitive part of the human brain is larger than the diameter of the edge 2 of the cell structure 1 at other positions of the cell layer. So set up, can increase the area of contact of helmet inner bag and human head on the one hand for it is more comfortable when the user wears the helmet, and on the other hand can further strengthen the intensity of cell layer and the position department that this position corresponds, and the protection user avoids huge impact. Of course, in other embodiments, the edge 2 may also be of polygonal prismatic configuration.
The embodiment of the invention also provides a manufacturing method of the helmet liner, the helmet liner is manufactured by a 3D printing technology, and the 3D printing technology is also called additive manufacturing. So set up, can be according to human head shape design helmet inner bag, the manufacturing of helmet inner bag is accomplished through 3D printing technique to the back of modelling, and helmet inner bag's manufacturing error is littleer to can make the human head of helmet inner bag laminating better, make the user wear more comfortablely, and helmet inner bag does not have the seam, and helmet inner bag's wholeness can be better, and intensity is higher.
In some embodiments, the helmet liner is made of thermoplastic polyurethane elastomer rubber (tpu) material and is made by laser selective cladding additive technology. So set up for the bearing capacity of helmet inner bag, impact resistance and shock-absorbing capacity are higher, thereby can provide better protection to the user, and the cold resistance of helmet is better, still has better elasticity, compliance and other physical properties even in cold areas, makes even under cold weather (for example when sports such as skiing, skating), the helmet inner bag still has better shock-absorbing capacity, in order to protect the user not to be hurt.
The embodiment of the invention also provides a helmet, which comprises an outer shell 7 and a helmet liner arranged in the outer shell 7, wherein the helmet liner is the helmet liner in any one of the embodiments. Alternatively, the helmet liner may be an interference fit with the outer shell 7, so that the helmet liner is clamped in the outer shell, or the helmet liner is adhesively fixed to the outer shell 7.
With the arrangement, the outer shell 7 can prevent hard objects such as sharp stones, branches and the like from penetrating into the helmet to cause injury to a user; the helmet liner can transmit external force generated by impact from the part in contact with the helmet shell 7 to the direction in contact with the head of a human body along the edge 2 of the unit cell structure 1 until the external force is transmitted to the head of the human body, and the elastic/plastic deformation of the unit cell structure 1 can remarkably play a role in buffering, so that the impact of the external force on the head of the human body can be reduced, and the safety of a user is effectively ensured; in addition, a large number of space gaps exist in the cell structure 1, so that a good ventilation effect can be realized, sweat of a user can be discharged, and the head of the user can be kept dry and comfortable; because the unit cell structure 1 has better overall plasticity, the inner wall of the unit cell structure can be slightly deformed, so that the joint area of the inner wall and the head is larger, the comfort is improved, the pressure of the head under the impact action can be obviously reduced, and the safety is improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a helmet inner bag, its characterized in that, includes the unit cell layer, the unit cell layer includes a plurality of interconnected unit cell structures (1), each unit cell structure (1) is the polyhedral structure including a plurality of edges (2), arbitrary adjacent two face is connected between unit cell structure (1), and arbitrary adjacent two connect between unit cell structure (1) on the face all edge (2) by these two adjacent unit cell structure (1) sharing, the unit cell layer constitutes the shell structure who is used for wrapping up human head, be provided with the opening that supplies human head to stretch into on the unit cell layer.
2. A helmet liner according to claim 1, wherein each of the unit cell structures (1) is a hexahedral structure.
3. The helmet liner according to claim 2, wherein the cell structure (1) further comprises a plurality of first ribs (3), first ends of the first ribs (3) are fixedly connected to each other, second ends of the first ribs (3) are fixedly connected to different vertices of the cell structure (1), respectively, and/or the cell structure (1) comprises a plurality of second ribs (4), first ends of the second ribs (4) are fixedly connected to each other, and second ends of the second ribs (4) are fixedly connected to different edges (2) of the cell structure (1), respectively.
4. A helmet liner according to claim 3, wherein the cell structure (1) further comprises a plurality of third reinforcing ribs (5), wherein first ends of the third reinforcing ribs (5) are fixedly connected to each other, and second ends of the third reinforcing ribs (5) are fixedly connected to second ends of the corresponding third reinforcing ribs (5) of the adjacent cell structure (1).
5. Helmet liner according to claim 2, wherein the density of the unit cell structures (1) is greater at the locations of the unit cell layers opposite sensitive areas of the human brain than at other locations of the unit cell layers.
6. Helmet liner according to claim 2, characterized in that the cross-sectional dimensions of the edge (2) of the unit cell structure (1) are larger at the location of the unit cell layer opposite to the sensitive part of the human brain than at other locations of the unit cell layer in the unit cell structure (1).
7. A method of manufacturing a helmet liner according to any of claims 1 to 6, wherein the helmet liner is manufactured by 3D printing techniques.
8. The manufacturing method of the helmet liner according to claim 7, wherein the helmet liner is made of a tpu material and is manufactured by a laser selective cladding additive technology.
9. Helmet, characterized in that it comprises an outer shell (7) and a helmet liner arranged inside said outer shell (7), said helmet liner being as defined in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010044883.1A CN111227419A (en) | 2020-01-07 | 2020-01-07 | Helmet liner, manufacturing method thereof and helmet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010044883.1A CN111227419A (en) | 2020-01-07 | 2020-01-07 | Helmet liner, manufacturing method thereof and helmet |
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| CN111227419A true CN111227419A (en) | 2020-06-05 |
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| CN202010044883.1A Pending CN111227419A (en) | 2020-01-07 | 2020-01-07 | Helmet liner, manufacturing method thereof and helmet |
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| CN112249509A (en) * | 2020-09-01 | 2021-01-22 | 哈尔滨工业大学（深圳） | Energy-absorbing structure and energy-absorbing buffer device |
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| CN112976565A (en) * | 2021-02-04 | 2021-06-18 | 新疆大学 | Manufacturing method of lightweight OT porous structure shockproof sports helmet |
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| CN113211781B (en) * | 2021-01-25 | 2022-11-29 | 嘉兴嘉创智医疗设备有限公司 | Method for printing orthopedic helmet by using 3D printer and 3D printer |
| CN112773040A (en) * | 2021-01-27 | 2021-05-11 | 赛乐得生物医疗(深圳)有限公司 | Helmet and helmet manufacturing method |
| CN112976565A (en) * | 2021-02-04 | 2021-06-18 | 新疆大学 | Manufacturing method of lightweight OT porous structure shockproof sports helmet |
| JP2022119695A (en) * | 2021-02-04 | 2022-08-17 | 東莞理工学院 | Method for manufacturing impact-resistant sports helmet with lightweight ot porous structure |
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