CN111010638A - A kind of ear cap with negative Poisson's ratio effect and design method thereof - Google Patents
A kind of ear cap with negative Poisson's ratio effect and design method thereof Download PDFInfo
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- CN111010638A CN111010638A CN201911246747.4A CN201911246747A CN111010638A CN 111010638 A CN111010638 A CN 111010638A CN 201911246747 A CN201911246747 A CN 201911246747A CN 111010638 A CN111010638 A CN 111010638A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
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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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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
本发明公开了一种具有负泊松比效应的耳帽及其设计方法，包括具有负泊松比效应的耳帽表面和耳帽根部；所述耳帽表面为圆罩形，所述耳帽根部为圆柱形；所述耳帽表面和耳帽根部为具有周期性横竖交替的孔洞的管状结构。本发明其产生负泊松比效应的关键在于耳帽表面和根部的负泊松孔洞结构的设计。在满足3D打印制作要求的情况下，保证横竖交替的孔状结构足够小，使耳帽表面和根部具有负泊松比效应，从而使得耳帽整体也具有负泊松比效应。通过该方法所设计出的耳帽具有明显的负泊松比效应，同时能在大的应变范围内维持负泊松比性能。此外，所设计的负泊松比耳帽不仅能在轴向拉伸压缩下表现出负泊松比性能，同时在弯曲作用下也能表现负泊松比性能。
The invention discloses an ear cap with negative Poisson's ratio effect and a design method thereof, comprising an ear cap surface and an ear cap root with negative Poisson's ratio effect; the ear cap surface is in the shape of a dome, and the ear cap The root is cylindrical; the surface of the ear cap and the root of the ear cap are tubular structures with periodic horizontal and vertical alternating holes. The key of the present invention to produce the negative Poisson's ratio effect lies in the design of the negative Poisson hole structure on the surface and root of the ear cap. In the case of meeting the requirements of 3D printing production, ensure that the horizontal and vertical alternate hole-like structures are small enough to make the surface and root of the ear cap have a negative Poisson's ratio effect, so that the entire ear cap also has a negative Poisson's ratio effect. The ear caps designed by this method have obvious negative Poisson's ratio effect and can maintain negative Poisson's ratio performance in a large strain range. In addition, the designed negative Poisson's ratio ear cap can not only exhibit negative Poisson's ratio performance under axial tension and compression, but also exhibit negative Poisson's ratio performance under bending.
Description
Technical Field
The invention relates to an ear cap with a negative Poisson ratio effect, which is designed by designing a perforated structure with a negative Poisson ratio, and provides a design method of the ear cap with the negative Poisson ratio, belonging to the field of new materials and new structures.
Background
Negative poisson's ratio materials and structures have mechanical properties different from conventional materials, which undergo lateral contraction (expansion) under uniaxial pressure (tension). Compared with the traditional material, the negative poisson's ratio material has advantages in many aspects, such as shear modulus, fracture resistance, notch resistance, energy absorption and consumption, resilience toughness and the like. Due to these excellent properties, the negative poisson's ratio material has a wider and wider application prospect in various directions such as medical field, sound insulation material, electromagnetic material, protective equipment and military field.
At present, negative Poisson's ratio materials have achieved a lot of results, and not only have a plurality of porous structures, such as oval, triangle, polygon, rotary square and double arrow-head shape, but also have sealed dimple-shaped structures. The traditional process can not finish the manufacture of the precise structure, but the 3D printing technology greatly expands the scientific research breadth and depth, and the three-dimensional negative Poisson's ratio material and structure with complex shapes can be printed by the new technology. The designed and manufactured negative poisson ratio material base material is mostly rubber, and has better bearing capacity and impact resistance. The negative Poisson ratio ear cap is an idea of applying a negative Poisson ratio material to reality, and is designed and manufactured according to the characteristic of the negative Poisson ratio expansion and compression. Nowadays, earphones become indispensable equipment in daily life of people, and the comfort degree of wearing the earphones is also one of important indexes of people. When the earphone is worn for a long time, the ear of the wearer is swollen and even painful, and the earphone is dropped due to improper wearing manner. According to the invention, a negative Poisson ratio hole structure and a 3D printing manufacturing process are combined, and the first ear cap with a negative Poisson ratio effect is designed and manufactured, and can respectively show negative Poisson ratio deformation performance under the working conditions of axial tension and compression. Compared with the traditional ear cap, the negative poisson ratio ear cap has better comfort and is easy to insert and difficult to fall, thereby having very strong practicability.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, combines structural optimization with a 3D printing technology, designs and manufactures a practical negative Poisson ratio ear cap, and provides a specific design method, wherein the designed ear cap has better deformability, heat dissipation and comfort compared with the traditional ear cap.
The technical scheme adopted by the invention is as follows: an ear cap with a negative poisson's ratio effect, comprising an ear cap surface with a negative poisson's ratio effect and an ear cap root; the surface of the ear cap is in a round cover shape, and the root part of the ear cap is cylindrical;
the surface of the ear cap and the root of the ear cap are tubular structures with holes which are periodically alternated horizontally and vertically;
the relation between the thickness D of the surface of the ear cap and the thickness D of the root of the ear cap satisfies the following conditions: D/D is more than 0 and less than 1;
the relation between the diameter R of the surface of the ear cap and the diameter R of the cylinder at the root of the ear cap satisfies the following conditions: 5 > R/R > 3;
the relation between the thickness D of the surface of the ear cap and the thickness D of the cylinder at the root of the ear cap satisfies the following conditions: D/D is more than 1 and less than 2;
the diameter r of the cylinder at the root of the ear cap and the height h of the root of the ear cap1Satisfies the following relationship: 2 < h1/r＜4；
The relation between the cylindrical diameter r of the root part of the ear cap and the thickness d of the root part of the ear cap satisfies the following conditions: d/r is more than 0.05 and less than 0.25;
the diameter R of the ear cap surface and the height h of the ear cap surface2Satisfies the following relationship: 0.75 < h2/R＜1.5。
Preferably, the apertures include oval, polygonal (including triangular, rotated square) and double arrow shaped.
The design method of the ear cap with the negative Poisson ratio effect comprises the following steps:
1) determining the shape and size of each component of the ear cap, including the diameter R of the surface of the ear cap, the thickness D of the surface of the ear cap, and the height h of the surface of the ear cap2The diameter r of the cylinder at the root of the ear cap, the thickness d of the root of the ear cap and the height h of the root of the ear cap1；
2) The surface and the root of the ear cap are designed to have a periodic horizontal and vertical alternating hole structure, and the space between the surface and the root of the ear cap is as small as possible under the condition that the ear cap meets the 3D printing requirement;
3) the ear cap with the negative Poisson ratio effect is manufactured by adopting a 3D printing technology, has better deformation characteristic, heat dissipation and comfort, and meets the requirement of practical use.
4) And (4) testing the negative Poisson ratio performance of the ear cap according to a field experiment, and selecting the ear cap which meets the actual size and use requirements.
The key of the negative Poisson ratio effect generated by the invention lies in the design of the negative Poisson hole structure on the surface and the root of the ear cap. Under the condition of meeting the requirement of 3D printing and manufacturing, the transverse and vertical alternate hole-shaped structures are ensured to be small enough, so that the surface and the root of the ear cap have a negative Poisson ratio effect, and the whole ear cap also has the negative Poisson ratio effect. The ear cap designed by the method has obvious negative Poisson ratio effect, and can maintain the negative Poisson ratio performance in a large strain range. In addition, the designed negative Poisson ratio ear cap can not only show the negative Poisson ratio performance under the axial tension and compression, but also show the negative Poisson ratio performance under the bending action.
Has the advantages that: the ear cap designed by the method has a larger negative Poisson ratio effect, can simultaneously show the negative Poisson ratio effect under axial tension, compression and bending, has better deformability, heat dissipation and comfort when being used compared with the traditional ear cap, and better meets the requirements of practical application.
Drawings
FIG. 1 is a schematic view of an ear cap of the present invention having a negative Poisson's ratio effect;
FIG. 2 is a top view of the ear cap of the present invention having a negative Poisson's ratio effect;
FIG. 3 is a schematic view of the surface of an earcap of the present invention;
fig. 4 is a schematic view of the base of the earcap of the present invention.
Detailed Description
The invention will be further described with reference to the following detailed description and the accompanying drawings:
1-4, an ear cap with a negative Poisson ratio effect comprises an ear cap surface 1 with a negative Poisson ratio effect and an ear cap root 2; the surface 1 of the ear cap is in a round cover shape, and the root 2 of the ear cap is in a cylindrical shape;
the ear cap surface 1 and the ear cap root 2 are tubular structures with periodically and vertically alternated holes; the holes comprise an oval shape, a polygonal shape (including a triangle and a rotating square) and a double-arrow shape;
the relation between the thickness D of the ear cap surface 1 and the thickness D of the ear cap root 2 satisfies: D/D is more than 0 and less than 1;
the relation between the diameter R of the ear cap surface 1 and the cylindrical diameter R of the ear cap root 2 satisfies: 5 > R/R > 3;
the relation between the thickness D of the ear cap surface 1 and the cylindrical thickness D of the ear cap root 2 satisfies: D/D is more than 1 and less than 2;
the relation between the cylindrical diameter r of the ear cap root 2 and the height h1 of the ear cap root 2 satisfies: h1/r is more than 2 and less than 4;
the relation between the cylindrical diameter r of the ear cap root part 2 and the thickness d of the ear cap root part 2 satisfies: d/r is more than 0.05 and less than 0.25;
the relation between the diameter R of the ear cap surface 1 and the height h2 of the ear cap surface 1 satisfies: h2/R is more than 0.75 and less than 1.5.
The detailed steps of the design of the ear cap with the negative Poisson ratio effect are as follows:
1. determining the shape and size of each component of the ear cap;
according to the earphone model, the sizes of the components of the designed earcap are determined, such as the diameter R of the surface of the earcap and the height h of the surface of the earcap2The thickness D of the surface of the ear cap, the diameter r of the cylinder at the root of the ear cap and the height h of the cylinder at the root of the ear cap1The thickness d of the cylinder at the root of the ear cap;
2. designing a perforation structure with periodic transverse and vertical alternate holes, wherein the perforation structure comprises ① ellipses, ② triangles and ③ rotating squares ④ double-arrow-shaped holes, and reducing the space between the holes as much as possible under the condition that the ear cap meets the requirement of 3D printing;
3. the designed ear cap with negative poisson's ratio effect is generated by using 3D printing technology.
4. And (4) testing the negative Poisson ratio performance of the ear cap according to a field experiment, and selecting the ear cap which meets the actual size and use requirements.
It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention. Components not explicitly described in this example can be implemented using existing techniques.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911246747.4A CN111010638A (en) | 2019-12-06 | 2019-12-06 | A kind of ear cap with negative Poisson's ratio effect and design method thereof |
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| CN201911246747.4A CN111010638A (en) | 2019-12-06 | 2019-12-06 | A kind of ear cap with negative Poisson's ratio effect and design method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024205303A1 (en) * | 2024-06-07 | 2025-12-11 | Vibrosonic Gmbh | EAR SYSTEM WITH ADJUSTABLE STRUCTURE |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245989A (en) * | 2015-10-26 | 2016-01-13 | 胡强 | In-ear headset |
| CN205105366U (en) * | 2015-10-26 | 2016-03-23 | 胡强 | In -ear headset |
| CN206226668U (en) * | 2016-11-21 | 2017-06-06 | 东莞市猎声电子科技有限公司 | An anti-drop earphone |
| US20170233253A1 (en) * | 2016-02-16 | 2017-08-17 | Korea Institute Of Science And Technology | Carbon nanotube structure and preparation method thereof |
| CN206533511U (en) * | 2017-02-27 | 2017-09-29 | 乐浪电子科技（深圳）有限公司 | Earphone earcap with acoustics groove |
| CN108000758A (en) * | 2017-12-01 | 2018-05-08 | 东华大学 | A kind of negative poisson's ratio composite material for weaving molding die and method |
| CN207677948U (en) * | 2017-10-31 | 2018-07-31 | 斯塔尔采夫·德米特里 | comfort ear cap |
| CN208241836U (en) * | 2018-05-21 | 2018-12-14 | 深圳市九为电子有限公司 | Earphone cap and the In-Ear Headphones for being equipped with the earphone cap |
| CN109451126A (en) * | 2018-12-19 | 2019-03-08 | 谢亿民工程科技南京有限公司 | A kind of mobile phone shell and its design method with Negative poisson's ratio |
| CN208956137U (en) * | 2018-12-19 | 2019-06-07 | 谢亿民工程科技南京有限公司 | A kind of mobile phone shell with Negative poisson's ratio |
| CN110133866A (en) * | 2019-05-10 | 2019-08-16 | 南京工业大学 | Mirror frame with negative Poisson ratio effect and design method thereof |
| CN209624916U (en) * | 2019-05-10 | 2019-11-12 | 南京工业大学 | Picture frame with negative poisson ratio effect |
| CN210491169U (en) * | 2019-12-06 | 2020-05-08 | 南京工业大学 | An ear cap with negative Poisson's ratio effect |
-
2019
- 2019-12-06 CN CN201911246747.4A patent/CN111010638A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245989A (en) * | 2015-10-26 | 2016-01-13 | 胡强 | In-ear headset |
| CN205105366U (en) * | 2015-10-26 | 2016-03-23 | 胡强 | In -ear headset |
| US20170233253A1 (en) * | 2016-02-16 | 2017-08-17 | Korea Institute Of Science And Technology | Carbon nanotube structure and preparation method thereof |
| CN206226668U (en) * | 2016-11-21 | 2017-06-06 | 东莞市猎声电子科技有限公司 | An anti-drop earphone |
| CN206533511U (en) * | 2017-02-27 | 2017-09-29 | 乐浪电子科技（深圳）有限公司 | Earphone earcap with acoustics groove |
| CN207677948U (en) * | 2017-10-31 | 2018-07-31 | 斯塔尔采夫·德米特里 | comfort ear cap |
| CN108000758A (en) * | 2017-12-01 | 2018-05-08 | 东华大学 | A kind of negative poisson's ratio composite material for weaving molding die and method |
| CN208241836U (en) * | 2018-05-21 | 2018-12-14 | 深圳市九为电子有限公司 | Earphone cap and the In-Ear Headphones for being equipped with the earphone cap |
| CN109451126A (en) * | 2018-12-19 | 2019-03-08 | 谢亿民工程科技南京有限公司 | A kind of mobile phone shell and its design method with Negative poisson's ratio |
| CN208956137U (en) * | 2018-12-19 | 2019-06-07 | 谢亿民工程科技南京有限公司 | A kind of mobile phone shell with Negative poisson's ratio |
| CN110133866A (en) * | 2019-05-10 | 2019-08-16 | 南京工业大学 | Mirror frame with negative Poisson ratio effect and design method thereof |
| CN209624916U (en) * | 2019-05-10 | 2019-11-12 | 南京工业大学 | Picture frame with negative poisson ratio effect |
| CN210491169U (en) * | 2019-12-06 | 2020-05-08 | 南京工业大学 | An ear cap with negative Poisson's ratio effect |
Non-Patent Citations (1)
| Title |
|---|
| 任鑫等: "负泊松比材料和结构的研究进展", 《力学学报》, vol. 51, no. 3, 21 January 2019 (2019-01-21) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024205303A1 (en) * | 2024-06-07 | 2025-12-11 | Vibrosonic Gmbh | EAR SYSTEM WITH ADJUSTABLE STRUCTURE |
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Application publication date: 20200414 |