CN210901878U - Toothbrush with negative Poisson ratio effect - Google Patents
Toothbrush with negative Poisson ratio effect Download PDFInfo
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- CN210901878U CN210901878U CN201922103442.XU CN201922103442U CN210901878U CN 210901878 U CN210901878 U CN 210901878U CN 201922103442 U CN201922103442 U CN 201922103442U CN 210901878 U CN210901878 U CN 210901878U
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- negative poisson
- toothbrush
- poisson ratio
- toothbrush head
- foam
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- 230000000694 effects Effects 0.000 title claims abstract description 35
- 239000006260 foam Substances 0.000 claims abstract description 45
- 239000000758 substrate Substances 0.000 claims abstract description 35
- 239000004033 plastic Substances 0.000 claims description 20
- 229920003023 plastic Polymers 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 16
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 5
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 5
- 229920000570 polyether Polymers 0.000 claims description 5
- 239000011496 polyurethane foam Substances 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 abstract description 4
- 230000003139 buffering effect Effects 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 2
- 229940034610 toothpaste Drugs 0.000 abstract description 2
- 239000000606 toothpaste Substances 0.000 abstract description 2
- 210000003128 head Anatomy 0.000 description 47
- 238000000034 method Methods 0.000 description 12
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010297 mechanical methods and process Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 210000000214 mouth Anatomy 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
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Abstract
The utility model discloses a toothbrush with negative poisson ratio effect, the matching design including negative poisson ratio toothbrush head and toothbrush handle, the toothbrush head includes negative poisson ratio base plate, negative poisson ratio foam and brush hair, negative poisson ratio base plate, brush hair and brush holder structure as an organic whole. The toothbrush head shrinks and becomes small when being pressed, so that the bristle part is more gathered, and the harm to the gum caused by the spreading of the traditional toothbrush bristles can be effectively avoided when the toothbrush is used for brushing teeth. Meanwhile, due to the characteristic that the negative Poisson ratio foam structure of the toothbrush head is soft and porous, the toothbrush head can play a role in buffering the impact of the toothbrush head on teeth and enriching toothpaste foam. The simple operation steps are as follows: firstly, determining the minimum size of an adopted injection mold which can be accurately manufactured; then, designing the hole distribution of the toothbrush head substrate to ensure that the substrate structure has a negative Poisson ratio effect; the side negative Poisson ratio foam and the brush handle which are matched with the base plate structure are further designed to complete the integral design of the negative Poisson ratio toothbrush.
Description
Technical Field
The utility model relates to a design toothbrush that has negative poisson ratio effect through design has negative poisson ratio perforation structure and negative poisson ratio foam, belongs to new material and new construction field.
Background
Toothbrushes have a long history as a common cleaning article. The traditional toothbrush has the advantages that due to the fact that the size of the brush head part of the traditional toothbrush is fixed, and due to the fact that a plurality of people brush teeth in an incorrect tooth brushing mode in the using process, bristles rub with gums, and the gums are easily damaged. Meanwhile, the traditional toothbrush is easy to generate a 'blooming' phenomenon that bristles are burst when in use, and the toothbrush is bred with bacteria, so that the more dirty the toothbrush is when being used for brushing teeth, the more the health of gum is damaged.
The negative poisson's ratio material and the structure have unusual mechanical properties, and different from the compression expansion and the stretching of the traditional material, the negative poisson's ratio material transversely contracts (expands) under the action of uniaxial pressure (tensile force). The perforated plate structure is formed by arranging hole structures with different shapes and cut holes in a sheet structure, and the randomness and the disorder of the distribution of the perforated structure enable the perforated plate to have great flexibility. The negative Poisson ratio foam has excellent mechanical properties and properties which are not possessed by a plurality of traditional materials, such as homodromous bending, a stretching effect, good buffering and energy absorption properties and the like, is convenient to prepare and low in cost, and is expected to be applied to the fields of aerospace, textile industry, biomedicine and the like.
The negative Poisson ratio toothbrush has the special properties of expansion and compression, and the size of the toothbrush head can be adjusted by contacting the toothbrush head with the oral cavity wall in the using process, so that the toothbrush head is reduced, the bristles are gathered more, the phenomenon of blooming of the bristles is reduced, and the gum is prevented from being damaged. Meanwhile, the foam structure with the negative Poisson ratio wrapped around has good buffering performance, and can reduce the impact of the brush head on the gum.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough to some to current toothbrush, utilizes the special property of negative poisson ratio material and structure, designs and has made the negative poisson ratio toothbrush that has the practicality, and the brush head size of toothbrush of design can be adjusted with the oral cavity wall contact according to the brush head to play and reduce the brush head, make the brush hair gather together more, avoid haring the effect of gum. Meanwhile, the foam structure with the negative Poisson ratio wrapped around has good buffering performance, and can reduce the impact of the brush head on the gum.
The utility model adopts the technical proposal that: a toothbrush with a negative Poisson ratio effect comprises a toothbrush head substrate with the negative Poisson ratio effect, negative Poisson ratio foam, bristles and a brush handle, wherein the toothbrush head substrate is embedded into the negative Poisson ratio foam, the bristles are arranged on the toothbrush head substrate, and the toothbrush head substrate is connected with the brush handle;
the toothbrush head substrate is of a periodic horizontal and vertical alternating hole structure, or a chiral structure or an anti-chiral structure;
the negative Poisson's ratio foam is prepared by adopting a thermal mechanical method by adopting conventional soft polyurethane foam plastic as a base material, or is prepared by adopting a foaming plastic method by adopting polyether type foam plastic as a base material;
the ratio of the width W of the toothbrush head substrate to the length L of the toothbrush head substrate meets the following requirements:
the thickness h of the toothbrush head substrate1Satisfies the following conditions: h is1≤5mm；
The negative Poisson ratio foam thickness h2Satisfies the following conditions: h is2≤3mm；
The bristle height H satisfies: 0.75 (h)1+2h2)mm≤H≤1.25(h1+2h2)mm。
Preferably, the hole structure shape of the toothbrush head base plate is an ellipse or a polygon.
The design method of the toothbrush with the negative Poisson ratio effect comprises the following steps:
1) the width W, the length L and the thickness h of the base plate of the toothbrush head are determined according to the size and the application of the toothbrush1Negative poisson's ratio foam thickness h2The height H of the brush hair, the shape and the corresponding size of a brush handle with matching design;
2) the toothbrush head base plate is designed to be a perforated structure with periodic horizontal and vertical alternate holes, and the distance between the holes is reduced as much as possible under the condition that the toothbrush head base plate meets the precision requirement of an injection mold; or the toothbrush head substrate is designed to be a chiral structure or an anti-chiral structure;
3) selecting conventional soft polyurethane foam plastic as a base material, and preparing negative Poisson ratio foam by adopting a thermal mechanical method; or polyether foam plastic is selected as a base material and is obtained by adopting a foam plastic method;
4) the toothbrush head base plate and the bristles with the negative Poisson ratio effect are manufactured by adopting an injection molding technology, and the manufacturing method comprises the following steps:
step 1: placing granular plastic into a charging barrel to be heated and melted;
step 2: injecting molten plastic into a toothbrush mold;
and step 3: releasing the pressure of the melt, cooling and demoulding to obtain a toothbrush head substrate with a negative Poisson's ratio effect and bristles;
5) and (3) wrapping the toothbrush head substrate with the negative Poisson ratio foam, and combining to prepare the toothbrush with the negative Poisson ratio effect.
The utility model discloses the key that produces negative poisson ratio effect lies in the combined design of negative poisson ratio base plate and negative poisson ratio foam. Under the condition of meeting the precision requirement of an injection mold, the transverse and vertical alternate porous structure is ensured to be small enough, so that the base plate of the toothbrush head part has a negative Poisson ratio effect, and the foam with the negative Poisson ratio effect is prepared by a thermomechanical method. The toothbrush 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 toothbrush can not only show the negative Poisson ratio performance under axial compression, but also show the negative Poisson ratio performance under the bending action.
Has the advantages that: the utility model discloses the toothbrush that utilizes this method to design has great negative poisson ratio effect and can show negative poisson ratio effect simultaneously under the axial compression, and it can reduce in traditional toothbrush brush head when brushing teeth relatively, and has the characteristics of avoiding haring the gum, richening toothpaste foam, stronger shock-absorbing capacity better. Better meets the requirements of practical application.
Drawings
FIG. 1 is an overall structural view of a toothbrush having a negative Poisson's ratio effect;
FIG. 2 is a front view of a toothbrush head base plate with negative Poisson's ratio effect and a negative Poisson's ratio foam combination;
FIG. 3 is a top view of the toothbrush with a negative Poisson's ratio effect;
FIG. 4 is a negative Poisson's ratio foam
FIG. 5 is a schematic view of a polygonal hole structure;
FIG. 6 is a schematic diagram of a chiral structure;
FIG. 7 is a first schematic view of an anti-chiral structure;
FIG. 8 is a schematic view of a reverse-handed configuration;
in the figure: 1. the toothbrush comprises a toothbrush head substrate, 2. negative Poisson ratio foam, 3. bristles and 4. a toothbrush handle.
Detailed Description
The invention will be further described with reference to the following specific embodiments and the accompanying drawings:
example 1: as shown in fig. 1-4, a toothbrush with a negative poisson's ratio effect comprises a toothbrush head substrate 1, negative poisson's ratio foam 2, bristles 3 and a brush handle 4, wherein the toothbrush head substrate 1 is embedded in the negative poisson's ratio foam 2, the bristles 3 are arranged on the toothbrush head substrate 1, and the toothbrush head substrate 1 is connected with the brush handle 4;
the toothbrush head substrate 1 is of a periodic vertical and horizontal alternate hole structure; the hole structure shape of the toothbrush head base plate 1 is an ellipse.
The negative Poisson ratio foam 2 is prepared by adopting a thermal mechanical method by adopting conventional soft polyurethane foam plastic as a base material;
the ratio of the width W of the toothbrush head base plate 1 to the length L of the toothbrush head base plate 1 meets the following requirements:
the thickness h of the toothbrush head base plate 11Satisfies the following conditions: h is1≤5mm。
The negative Poisson ratio foam has a 2-thickness h2Satisfies the following conditions: h is2≤3mm。
The height H of the brush hair 3 satisfies: 0.75 (h)1+2h2)mm≤H≤1.25(h1+2h2)mm。
The design detail steps of the toothbrush with the negative Poisson ratio effect are as follows:
1) the width W, the length L and the thickness h of the base plate of the toothbrush head are determined according to the size and the application of the toothbrush1Negative poisson's ratio foam thickness h2The height H of the brush hair of the toothbrush head, the shape and the corresponding size of the brush handle with matching design;
2) designing a toothbrush head base plate to be a perforated structure with periodic transverse and vertical alternate holes, and reducing the space between the holes as much as possible under the condition that the base plate of the toothbrush head meets the precision requirement of an injection mold;
3) selecting conventional soft polyurethane foam plastic as a base material, and preparing negative Poisson ratio foam by adopting a thermal mechanical method;
4) the toothbrush base plate and the bristles with the negative Poisson ratio effect are manufactured by adopting an injection molding technology. The method comprises the following steps:
step 1: placing granular plastic into a charging barrel to be heated and melted;
step 2: injecting molten plastic into a toothbrush mold;
and step 3: and (4) demolding after the pressure relief and cooling of the melt to obtain the toothbrush base plate bristles with the negative Poisson ratio effect.
5) And (3) wrapping the toothbrush substrate with the negative Poisson ratio foam to obtain the toothbrush with the negative Poisson ratio effect.
Example 2: as shown in fig. 1-8, a toothbrush with a negative poisson's ratio effect comprises a toothbrush head substrate 1, negative poisson's ratio foam 2, bristles 3 and a brush handle 4, wherein the toothbrush head substrate 1 is embedded in the negative poisson's ratio foam 2, the bristles 3 are arranged on the toothbrush head substrate 1, and the toothbrush head substrate 1 is connected with the brush handle 4;
the toothbrush head substrate 1 is of a chiral structure or an anti-chiral structure; the hole structure shape of the toothbrush head base plate 1 is polygonal.
The negative Poisson ratio foam 2 is obtained by selecting polyether foam plastic as a base material and adopting a foaming plastic method;
the ratio of the width W of the toothbrush head base plate 1 to the length L of the toothbrush head base plate 1 meets the following requirements:
the thickness h of the toothbrush head base plate 11Satisfies the following conditions: h is1≤5mm。
The negative Poisson ratio foam has a 2-thickness h2Satisfies the following conditions: h is2≤3mm。
The height H of the brush hair 3 satisfies: 0.75 (h)1+2h2)mm≤H≤1.25(h1+2h2)mm。
The design detail steps of the toothbrush with the negative Poisson ratio effect are as follows:
1) the width W, the length L and the thickness h of the base plate of the toothbrush head are determined according to the size and the application of the toothbrush1Negative poisson's ratio foam thickness h2The height H of the brush hair of the toothbrush head, the shape and the corresponding size of the brush handle with matching design;
2) designing a toothbrush head substrate to be a chiral structure or an anti-chiral structure;
3) selecting polyether foam plastic as a base material, and obtaining negative Poisson ratio foam by adopting a foaming plastic method;
4) the toothbrush base plate and the bristles with the negative Poisson ratio effect are manufactured by adopting an injection molding technology. The method comprises the following steps:
step 1: placing granular plastic into a charging barrel to be heated and melted;
step 2: injecting molten plastic into a toothbrush mold;
and step 3: and (4) demolding after the pressure relief and cooling of the melt to obtain the toothbrush base plate bristles with the negative Poisson ratio effect.
5) And (3) wrapping the toothbrush substrate with the negative Poisson ratio foam to obtain the toothbrush with the negative Poisson ratio effect.
The embodiments of the present invention are described in detail with reference to the drawings, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art and are intended to be within the scope of the present principles and the spirit of the invention.
Claims (2)
1. A toothbrush having a negative poisson's ratio effect, characterised in that: the toothbrush comprises a toothbrush head substrate with a negative Poisson ratio effect, negative Poisson ratio foam, bristles and a brush handle, wherein the toothbrush head substrate is embedded in the negative Poisson ratio foam, the bristles are arranged on the toothbrush head substrate, and the toothbrush head substrate is connected with the brush handle;
the toothbrush head substrate is of a periodic horizontal and vertical alternating hole structure, or a chiral structure or an anti-chiral structure;
the negative Poisson ratio foam selects soft polyurethane foam plastic as a base material, or selects polyether type foam plastic as a base material;
the ratio of the width W of the toothbrush head substrate to the length L of the toothbrush head substrate meets the following requirements:
the thickness h of the toothbrush head substrate1Satisfies the following conditions: h is1≤5mm；
The negative Poisson ratio foam thickness h2Satisfies the following conditions: h is2≤3mm；
The bristle height H satisfies: 0.75 (h)1+2h2)mm≤H≤1.25(h1+2h2)mm。
2. A toothbrush having a negative poisson's ratio effect as claimed in claim 1, wherein: the hole structure of the toothbrush head base plate is in an oval or polygonal shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922103442.XU CN210901878U (en) | 2019-11-29 | 2019-11-29 | Toothbrush with negative Poisson ratio effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922103442.XU CN210901878U (en) | 2019-11-29 | 2019-11-29 | Toothbrush with negative Poisson ratio effect |
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| CN210901878U true CN210901878U (en) | 2020-07-03 |
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| CN201922103442.XU Active CN210901878U (en) | 2019-11-29 | 2019-11-29 | Toothbrush with negative Poisson ratio effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110754784A (en) * | 2019-11-29 | 2020-02-07 | 南京工业大学 | Toothbrush with negative Poisson ratio effect and design method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110754784A (en) * | 2019-11-29 | 2020-02-07 | 南京工业大学 | Toothbrush with negative Poisson ratio effect and design method thereof |
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