CN115363296A - Arc unit and arc protective structure - Google Patents
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- CN115363296A CN115363296A CN202110541432.3A CN202110541432A CN115363296A CN 115363296 A CN115363296 A CN 115363296A CN 202110541432 A CN202110541432 A CN 202110541432A CN 115363296 A CN115363296 A CN 115363296A
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
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Abstract
The application relates to an arc unit, including first arc curb plate, second arc curb plate and middle sheet layer, the crooked direction of first arc curb plate and second arc curb plate is the same, and middle sheet layer has curved three pumps paper folding and derives the structure, and curved three pumps paper folding and derive the structure and form at least one-level bearing structure between first arc curb plate and second arc curb plate. Still relate to an arc protective structure, including arc flexible substrate and a plurality of as above arc unit, the arc unit is laid at the flexible substrate's of arc at least one side surface. This application has designed arc unit and arc protective structure that can be used for the protection of arc object based on three pu paper folds, utilizes at least one-level bearing structure to form reasonable conquassation mode, can in time effectively disperse the impact force, and to a great extent has improved barrier propterty when having structural flexibility, has lightweight characteristics simultaneously.
Description
Technical Field
The application relates to the technical field of protective articles, in particular to an arc-shaped unit and an arc-shaped protective structure.
Background
Protective articles such as armour may be used to protect a person or a designated area from injury due to external forces or impact from an object. For the activity of making things convenient for flexible protection object, protective articles need still possess certain flexibility ratio simultaneously except that protective properties, but protective properties and flexibility ratio often exist contradiction each other in protective articles's design, generally need use hard board in order to guarantee protective properties, and the introduction of hard board not only makes protective structure become comparatively heavy, also led to the fact the influence to the flexibility ratio, consequently, because the demand of flexibility, some protective articles often do not set up protective structure or plus the independent protective equipment that the flexibility is not enough in joints department such as shoulder, knee, lead to the protective properties of junction to cut down greatly. Therefore, there is a need for a lightweight protective structure that can conform to an arcuate object and improve the protective performance while maintaining structural flexibility.
Disclosure of Invention
In view of the above technical problems, the present application provides an arc-shaped unit and an arc-shaped protection structure, can be used for the protection of arc-shaped objects, the protective performance is improved while the structure flexibility is kept, and the light weight characteristic is achieved.
In order to solve the technical problem, the application provides an arc unit, including first arc curb plate, second arc curb plate and middle sheet layer, first arc curb plate with the crooked direction of second arc curb plate is the same, middle sheet layer has curved three pumps paper folding and derives the structure, curved three pumps paper folding derives the structure and is in first arc curb plate with form at least one-level bearing structure between the second arc curb plate.
Optionally, the curved triple-pump origami derivative structure comprises a plurality of curved unit cells connected in an array arrangement, wherein the curved unit cells are provided with two supporting parts which can be folded mutually; under the folded state, every the support part forms at least one-level bearing structure and both ends support respectively in first arc curb plate with second arc curb plate.
Optionally, under the planar state, the arc cell has the straight line crease that is parallel to each other and follows middle part sawtooth crease, the avris sawtooth crease that the extending direction of straight line crease arranged, middle part sawtooth crease will the arc cell divide into two the support part, middle part sawtooth crease with mutually different between the apex angle that the avris sawtooth crease corresponds.
Optionally, the lengths of the straight creases are equal and are arranged at equal intervals, and the lengths of two parts of the straight creases at the side edges, which are formed by dividing the middle zigzag crease, are equal.
Optionally, no zigzag crease is arranged between the middle zigzag crease and the side zigzag crease corresponding to the supporting part to form a one-stage supporting structure, or an even number of derivative zigzag creases arranged along the extending direction of the linear crease are arranged to form at least two-stage supporting structures; the two sides of all the saw-tooth folds are symmetrical with respect to the straight fold located in the middle.
Optionally, in a folded state, the vertex angle corresponding to the end of the side sawtooth folding line, the vertex angle formed by folding the side sawtooth folding line, the vertex angle corresponding to the end of the middle sawtooth folding line, and the vertex angle formed by folding the middle sawtooth folding line are respectively located on a cylindrical surface, and all the cylindrical surfaces are coaxial.
Optionally, the distance between the vertex angle and the axis corresponding to the cylindrical surface satisfies the following relationship:
r 3 -r 1 -t 1 /2≤t 2 /2；
r 4 -r 2 -t 1 /2≤t 2 /2；
<xnotran> , r </xnotran> 1 The radius of the cylindrical surface where the vertex angle of the end part corresponding to the side sawtooth crease is located; r is a radical of hydrogen 2 The radius of the cylindrical surface where the vertex angle of the end part corresponding to the middle sawtooth crease is located; r is 3 As side saw teeth fold formation the radius of the cylindrical surface where the vertex angle of (a) is located; r is 4 The radius of a cylindrical surface where a vertex angle formed by folding the middle sawtooth crease is located; t is t 1 The thickness of the arc-shaped unit cell is the plate thickness; t is t 2 The thickness of the first arc-shaped side plate or the second arc-shaped side plate is set.
Optionally, the first arc-shaped side plate, the second arc-shaped side plate and the middle plate layer are integrally formed.
The application also provides an arc protective structure, including the flexible substrate of arc and a plurality of as above arc unit, the arc unit is laid at least one side surface of the flexible substrate of arc.
Optionally, the arc-shaped units are arranged periodically and overlapped with each other in a staggered manner.
The application relates to an arc unit, including first arc curb plate, second arc curb plate and middle sheet layer, the crooked direction of first arc curb plate and second arc curb plate is the same, and middle sheet layer has curved three pumps paper folding and derives the structure, and curved three pumps paper folding and derive the structure and form at least one-level bearing structure between first arc curb plate and second arc curb plate. Still relate to an arc protective structure, including arc flexible substrate and a plurality of as above arc unit, the arc unit is laid at the flexible substrate's of arc at least one side surface. This application has designed arc unit and the arc protective structure that can be used for the protection of arc object based on three pu paper folding, utilizes at least one-level bearing structure to form reasonable conquassation mode, can in time effectively disperse the impact force, and to a great extent has improved barrier propterty when guaranteeing the structure flexibility.
Drawings
Fig. 1 is one of the structural schematic diagrams of the arc unit shown according to the first embodiment;
FIG. 2 is a second schematic structural view of the arcuate cell according to the first embodiment;
FIG. 3 is a design explanatory diagram showing an arc unit having a primary support structure according to the first embodiment;
FIG. 4 is a design explanatory diagram of an arc unit having a secondary support structure shown according to the first embodiment;
FIG. 5 is a comparison of an arcuate cell having a primary support structure and an arcuate cell having a secondary support structure shown in accordance with the first embodiment;
FIG. 6 is one of the schematic structural views of an arcuate containment structure shown in accordance with a second embodiment;
FIG. 7 is a second schematic structural view of the arcuate containment structure shown in accordance with the second embodiment;
fig. 8 is a third schematic structural view of the arc-shaped shielding structure according to the second embodiment.
Detailed Description
The following embodiments are provided to illustrate the present disclosure, and other advantages and effects will be apparent to those skilled in the art from the disclosure.
In the following description, reference is made to the accompanying drawings, the drawings depict several embodiments of the present application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description is not to be taken in a limiting sense, and the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Although the terms first, second, etc. may be used herein to describe various elements in some instances, these elements should not be limited by these terms. These terms are used only in to connect an element to distinguish from another element.
Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.
First embodiment
Fig. 1 is one of the structural schematic diagrams of the arc unit shown according to the first embodiment; fig. 2 is a second schematic structural view of the arc unit according to the first embodiment. As shown in fig. 1 and fig. 2, the arc-shaped unit of the present embodiment includes a first arc-shaped side plate 11, a second arc-shaped side plate 12, and an intermediate plate layer 13, wherein the first arc-shaped side plate 11 and the second arc-shaped side plate 12 have the same bending direction, and the intermediate plate layer 13 has an arc-shaped triple-pump origami derivative structure.
The middle plate layer 13 of the application adopts an arc-shaped three-pump folded paper derivative structure, can synchronously realize the optimization of strength and energy absorption, and in addition, the middle plate layer has a compact structure, can reduce the weight of an arc-shaped unit and has the characteristic of light weight.
The middle plate layer 13 includes a plurality of arcs arranged in an array the unit cells form an arc-shaped three-pump origami derivative structure. FIG. 3 (a) is a schematic diagram of a conventional three-pump paper folding unit cell in a folded state; FIG. 3 (b) is a schematic diagram of the arc-shaped unit cell of the present embodiment in a planar state; fig. 3 (c) is a schematic view of the arc-shaped unit cells of the present embodiment arranged and connected in one direction. As shown in FIG. 3 (a), the conventional three-pump folding unit cell is composed of four folds intersecting at a point, and the plane paper is divided into four acute angles α 1 The three-pump paper folding unit cells of the parallelogram panel can be infinitely arrayed to form a periodic structure, the traditional three-pump paper folding structure is composed of mutually parallel linear creases and sawtooth creases, the sawtooth creases are alternately distributed in mountain folds and valley folds along the direction of the linear creases and are mutually parallel in a plane state, and solid lines and dotted lines in fig. 3 (a) respectively represent the mountain folds and the valley folds. The folded three-dimensional structure has the vertex respectively positioned on two planes which are parallel to each other, and the distance between the upper bottom surface and the lower bottom surface is d 1 The acute angle projected by each quadrangle on the bottom surface is alpha 1 ' the structure of three-pump paper folding has the characteristic of single degree of freedom, and can be completely unfolded into a plane or completely folded into a plane. As shown in fig. 3 (b), the present application changes the characteristic of parallel arrangement of saw-toothed folds in the conventional three-pump origami structure, so as to obtain an arc-shaped three-pump origami unit cell, which can be called an arc-shaped unit cell, and still has the characteristic of single degree of freedom, and by connecting a plurality of arc-shaped unit cells in an array arrangement in rows and/or columns, the arc-shaped three-pump origami derivative structure shown in fig. 3 (c) can be obtained,at this time, in the folded three-dimensional structure, the vertexes are respectively positioned on two arc surfaces which are parallel to each other.
As shown in fig. 3 (b), the arc-shaped unit cell of the present invention has 3 parallel straight creases 131, middle saw-tooth creases 133 and side saw-tooth creases 132 arranged along the extending direction of the straight creases 131, the side saw-tooth creases 132 are parallel to each other, the middle saw-tooth creases 133 divide the arc-shaped unit cell into two supporting parts, i.e., left and right parts in the drawing, and the two supporting parts are folded at a predetermined angle. Referring to fig. 1 and 2, in a folded state, two ends of each supporting portion are respectively supported by the first arc-shaped side plate 11 and the second arc-shaped side plate 12.
Referring to FIG. 3 (b), in the planar state, the basic geometric parameters of the arc-shaped unit cell are l and α 1 、α 2 H and l are two parts of lengths of the straight creases (131) positioned on the side edges and formed by dividing the middle sawtooth creases (133), the lengths of the two parts are equal, and the straight creases (131) are parallel to each other and have equal lengths; h is the distance between adjacent straight creases 131, and the straight creases 131 are arranged at equal intervals; alpha (alpha) ("alpha") 1 Is the acute angle formed by the straight fold 131 in the middle and the edge of the side saw fold 132, alpha 2 The straight fold 131 of the middle part forms an acute angle with the edge of the middle saw-tooth fold 133, and the vertex angle (2 alpha) of the middle saw-tooth fold 133 corresponds to 2 ) The vertex angle (2. Alpha.) corresponding to the side saw-toothed fold 132 1 ) Which are different from each other, in fig. 3 (b), the vertex angle corresponding to the middle saw-toothed fold 133 is smaller than the vertex angle corresponding to the side saw-toothed fold 132. Two sides of all the saw-toothed creases are symmetrical with respect to the straight crease 131 located at the middle, wherein the side of the side saw-toothed crease 132 has a side length of a 1 The length of the side of the middle zigzag fold 133 is a 2 . In practical implementation, referring to fig. 3 (c), since the two supporting parts of the arc unit cells are periodically and alternately arranged in the whole structure, the division of the arc unit cells may also be a structure that the left and right parts of fig. 3 (b) are exchanged, so that the positions of the middle saw-tooth fold 133 and the side saw-tooth fold 132 shown in fig. 3 (b) are exchanged, and the vertex angle corresponding to the middle saw-tooth fold is larger than the vertex angle corresponding to the side saw-tooth fold.
The arc-shaped unit cells are periodically arranged for M and N times along the directions of the x axis and the y axis respectively, and after being folded, a three-dimensional arc-shaped structure (M =3, N = 1) as shown in fig. 3 (c) can be obtained, corresponding to the folding angle
As a variable, the circumferential central angle of the arc unit cell along the y axis is theta 0 And the width is H. In the folded state, the vertex angle corresponding to the end of the side sawtooth folding line 132, the vertex angle formed by folding the side sawtooth folding line 132, the vertex angle corresponding to the end of the middle sawtooth folding line 133 and the vertex angle formed by folding the middle sawtooth folding line 133 are respectively positioned on a cylindrical surface, all the cylindrical surfaces are coaxial, and the axis is parallel to the y axis. Wherein r is 1 The radius of the cylindrical surface where the vertex angle of the end part of the corresponding side sawtooth crease 132 is located; r is 2 The radius of the cylindrical surface where the vertex angle of the end part of the corresponding middle sawtooth crease 133 is located; r is 3 The radius of the cylindrical surface where the vertex angle formed by folding the side sawtooth crease 132 is located; r is 4 The radius of the cylindrical surface where the vertex angle formed by folding the middle saw-tooth folding lines 133 is located. r is a radical of hydrogen 2 Is the shortest radius, i.e., the inner diameter r of the curved three-pump origami-derived structure 3 The longest radius is the outer diameter of the curved triple-pump origami derivative. It should be noted that the various radii in the figures illustrate the intersection of the reticle on the same axis (axis parallel to the y-axis) rather than a point. By adjusting the ratio of the division of the side linear creases 131 by the middle saw-tooth creases 133, the number of cylindrical surfaces can be reduced to two, and stable support can be obtained.
Optionally, the distance between the vertex angle corresponding to the end of the side sawtooth folding line 132, the vertex angle formed by folding the side sawtooth folding line 132, the vertex angle corresponding to the end of the middle sawtooth folding line 133, the vertex angle formed by folding the middle sawtooth folding line 133, and the axis corresponding to the cylindrical surface where the vertex angle corresponds, i.e. the radius of each cylindrical surface, satisfies the following relationship:
r 3 -r 1 -t 1 /2≤t 2 /2 (1)
r 4 -r 2 -t 1 /2≤t 2 /2 (2)
wherein, t 1 The thickness of the plate is the plate thickness of the arc-shaped unit cell; t is t 2 The thickness of the first arc-shaped side plate 11 or the second arc-shaped side plate 12. In this dimensional relationship, r 3 The neutral layer at the corresponding vertex is overlapped with the neutral layer of the corresponding arc-shaped side plate, and r can be ensured 1 The corresponding outer top points are higher than the inner surfaces of the corresponding arc-shaped side plates, so that the contact between each top point of each arc-shaped unit cell and the corresponding arc-shaped side plate is realized, and stable support is obtained.
When designing an arc-shaped three-pump paper folding derivative structure attached to a target curved surface, the macroscopic geometric parameter r of the arc-shaped three-pump paper folding derivative structure is used 1 、r 2 、r 3 、θ 0 H is a known geometric parameter, and basic parameters l and alpha of the arc-shaped unit cell can be obtained by reversely deducing through geometric analysis 1 、α 2 H and fold angle
Wherein, theta 1 、θ 2 Respectively is the vertex angle m of the isosceles triangle where the adjacent equal-length straight crease lines are positioned 1 、m 2 The height of the isosceles triangle where the adjacent sawtooth creases are located is respectively high.
The three-pump curved paper folding derivative structure has the same folding characteristics as the traditional three-pump paper folding structure, and can be completely unfolded and folded. Because the derivative structure of the arc-shaped three-pump folded paper is a periodic array structure, the rotation angle between the arc-shaped unit cells is equivalent to the central angle theta of the arc-shaped unit cells 0 The value of the rotation angle is the folding degree of the arc-shaped three-pump folded paper derived structure
And (6) determining. When the structure is completely folded
At 0 °, the rotation angle reaches a maximum value; when in use
At 180 deg., the structure is completely unfolded into a plane, the rotation angle is 0.
With continued reference to fig. 1 and 2, a 3D model of the arc cells can be built by SolidWorks. Referring to the design method of the curved three-pump origami derivative structure shown in fig. 3 (c), a model with M =5 and N =3 is taken as the middle plate layer 13, and the first curved side plate 11 and the second curved side plate 12 are respectively the inner and outer tangent sectors of the curved three-pump origami derivative structure, so as to obtain the curved unit shown in fig. 1 and 2. The central angle theta of the sector section is the central angle occupied by the two ends of the middle plate layer 13 along the circumferential direction and the axis scale The two tangent planes have a radius of r 2 、r 3 . Thickness t of intermediate sheet layer 13 1 Is 0.1mm, and the modeling parameters are as follows: r is 1 ＝40.96mm、r 2 ＝40mm、r 3 ＝41mm、θ 0 =2.38 ° and H =2mm, and under the parameter, the macroscopic size of the lower surface of the second arc-shaped side plate 12 in the radial direction and the circumferential direction is about 6mm × 10mm, and the central angle θ is scale About 14.54 deg., and the total thickness T of the arc units in the radial direction is 1mm (i.e., r) 3 -r 2 )。
Alternatively, the first arc-shaped side plate 11, the second arc-shaped side plate 12 and the middle plate layer 13 are integrally molded by using the same material, for example, a GR high-precision hard resin may be used for 3D printing and integral molding.
Optionally, the curved triple-pump flap derivative structure forms at least one stage of supporting structure between the first curved side plate 11 and the second curved side plate 12. During actual implementation, through the crease design to every support section, every support section can form at least one grade of bearing structure to can obtain the crushing mode of ideal according to the protection demand, play better protective effect. In fig. 1 to 3, no saw-toothed fold is provided between the middle saw-toothed fold 133 and the side saw-toothed fold 132 corresponding to the support part to form a primary support structure. As shown in fig. 4 (a), in order to form a geometrical diagram of the paper folding structure of the secondary support structure, an even number of derivative saw-tooth folds 134 are disposed between the middle saw-tooth fold 133 and the side saw-tooth fold 132 corresponding to the support portion, and the derivative saw-tooth folds 134 are arranged along the extending direction of the straight-line folds to form at least two stages of support structures, and the number of the derivative saw-tooth folds 134 is preferably 2. That is, in the two supporting parts shown in fig. 3 (b), the derived zigzag creases 134 as shown in fig. 4 (a) are respectively provided to divide each supporting part into three sections, forming a secondary supporting structure, and the included angle α between the side of the derived zigzag crease 134 and the straight crease of the middle part can be selected according to actual design.
Fig. 3 (b) is a geometrical diagram of an arc-shaped unit cell having a primary support structure, and fig. 4 (a) is a geometrical diagram of a paper folding unit for forming a secondary support structure. The height difference H' of the section where the zigzag creases at both ends are located as shown in FIG. 4 (b) can be achieved by adjusting the side length (i.e. /) of the adjacent quadrangle along the straight crease 131 in FIG. 3 (b)，l 1 、l 2 、l 3 Is the sum of l, l 1 、l 2 、l 3 Is determined by the folding degree of the arc unit cell
And the height difference of the sawtooth creases at the two ends of the adjacent quadrangle. By introducing the secondary support structure shown in fig. 4 (a), the arc-shaped unit cell with the layer thickness H' can be induced to generate a stable crushing mode in the deformation process, and meanwhile, the arc-shaped unit cell can be developed into an arc-shaped three-pump folded paper derivative structure without affecting the folding characteristic of the whole structure, so that the arc-shaped unit cell is suitable for various three-pump folded paper derivative structures.
As shown in fig. 4 (B) and 4 (C), a simplified geometric schematic is obtained by taking a central line a-C-D-B of the arc-shaped unit cell with the secondary support structure when the arc-shaped unit cell is completely folded into a plane as a two-dimensional structure, wherein a line segment AB is the central line of the arc-shaped unit cell with the primary support structure, and a line segment CD and the line segment AB are perpendicular bisectors. On the basis, taking the modeling parameters of the arc-shaped unit with the primary support structure as M =5 r 2 ＝40.0mm、r 3 =41.0mm, thickness t of arc unit cell 1 =0.1mm, thickness T =1mm of arc-shaped cell, central angle θ scale =14.3 °, create a single-layer two-dimensional arc-shaped cell as shown in fig. 5 (a), with a primary support structure. Further, the length of the line segment CD is 0.3mm, the intersection point of each line segment is simplified into a triangle, and a single-layer two-dimensional arc unit shown in fig. 5 (b) is established, and has a secondary support structure. By testing the simplified models shown in fig. 5 (a) and 5 (b), the crush patterns of the two can be compared. It can be understood that the geometric relationship of the arc-shaped unit cell with the secondary support structure is substantially the same as the geometric relationship of the arc-shaped unit cell with the primary support structure, and the parameter of the main change is l, so the parameter geometric relationship of the arc-shaped unit cell with the secondary support structure is not described herein again.
The utility model provides an arc unit, including first arc curb plate, second arc curb plate and middle sheet layer, the crooked direction of first arc curb plate and second arc curb plate is the same, and middle sheet layer has curved three pump paper folding and derives the structure, and curved three pump paper folding derives the structure and forms at least one-level bearing structure between first arc curb plate and second arc curb plate. The application designs an arc-shaped unit which can be used for protecting an arc-shaped object based on three-pump origami, at least one stage of support structure is utilized to form a reasonable crushing mode, the impact force can be effectively dispersed in time, the protective performance is improved to a great extent while the structural flexibility is kept, and meanwhile, the light-weight characteristic is achieved. The defect that impact force cannot be dispersed timely due to the fact that the plane unit is not attached to the curved surface is avoided, the two-stage support structure has the advantages of being low in peak value, long in effective stroke, small in fluctuation and the like, the energy absorption characteristic of the arc unit is further optimized, and the peak load of the arc unit under medium-high speed impact is reduced.
Second embodiment
As shown in fig. 6, 7 and 8, the arc-shaped protection structure of the present embodiment includes an arc-shaped flexible substrate 2 and a plurality of arc-shaped units 1, wherein the arc-shaped units 1 are disposed on at least one side surface of the arc-shaped flexible substrate 2, preferably on a convex side surface of the arc-shaped flexible substrate 2.
The structure of the arc-shaped unit 1 is as described in the first embodiment, wherein the middle board layer 13 has an arc-shaped three-fold paper derivative structure and forms at least one stage of supporting structure, and the specific structure is described in the first embodiment and is not described herein again.
The arc units 1 are arranged periodically and are overlapped with each other in a staggered way. By taking the arrangement form of fish scales as a reference, the central line of the rear row of arc-shaped units 1 is aligned with the gap of the front row of arc-shaped units 1, and an overlapping area and a relative rotation angle are formed between the adjacent circumferential arc-shaped units 1, so that the upper tangent plane and the lower tangent plane of the adjacent arc-shaped units 1 are completely attached.
In some embodiments, the thickness of the optional arc-shaped flexible substrate 2 is 5mm, the inner and outer radii are 35mm and 40mm respectively, the width is 40mm, the macroscopic dimensions of the upper surface of the arc-shaped flexible substrate 2 in the radial direction and the circumferential direction are about 40mm × 60mm, and the central angle is 86 °. The arc-shaped units 1 are arrayed 7 times along the circumferential direction of the arc-shaped flexible substrate 2 and 6 times along the radial direction. By taking the arrangement form of the fish scales as a reference, each row of arc-shaped units 1 are circumferentially arranged at intervals in a staggered manner along the arc-shaped flexible substrate 2 according to the rule of 6,5,6,5 · · that is, the central line of the rear row of arc-shaped units 1 is aligned with the gap of the front row of arc-shaped units 1. Two sides of the arc-shaped units 1 in 5 rows are respectively filled with half of the arc-shaped units 1. The overlapping area between the adjacent arc units 1 along the annular direction is 1/4 of the annular length of the single arc unit 1, the relative rotation angle is about 7.16 degrees (the y axis is a rotating shaft) so as to ensure that the upper section and the lower section of the adjacent arc unit 1 are completely attached, and the equal-proportion arc unit 1 and the arc protection structure can be molded by means of additive manufacturing technologies such as 3D printing and the like. In practical implementation, the arc-shaped units 1 can be bonded on the surface of the arc-shaped flexible substrate 2 by an adhesive such as silicone, and the arc-shaped flexible substrate 2 can be made of a flexible material such as PDMS. Because the upper and lower surfaces of the circumferentially adjacent arc units 1 are completely attached, relative corners do not exist, the arc units 1 are more suitable for arc protection objects relative to the planar structure, and can be attached to the arc surfaces to a greater extent, so that the defect that local flexible substrates are pulled under the action of external force due to the fact that the planar structures are tilted relative corners exists between the planar structures when the planar structures are attached to the arc surfaces is well avoided, impact loads can be dispersed by the surrounding arc units 1 more uniformly, and damage to the flexible objects is reduced.
The application provides an arc-shaped protection structure, which comprises an arc-shaped flexible substrate and a plurality of arc-shaped units, wherein the arc-shaped units are laid on at least one side surface of the arc-shaped flexible substrate. This application has designed arc unit and arc protective structure that can be used for the protection of arc object based on three pu paper folds, utilizes at least one-level bearing structure to form reasonable conquassation mode, can in time effectively disperse the impact force, and to a great extent has improved barrier propterty when having structural flexibility.
The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present disclosure be covered by the claims of the present application.
Claims (10)
1. The utility model provides an arc unit, its characterized in that includes first arc curb plate, second arc curb plate and middle sheet layer, first arc curb plate with the crooked direction of second arc curb plate is the same, middle sheet layer has curved three pumps paper folding and derives the structure, curved three pumps paper folding derives the structure and is in form at least one-level bearing structure between first arc curb plate and the second arc curb plate.
2. The arc-shaped unit of claim 1, wherein the arc-shaped triple-pump origami-derived structure comprises a plurality of arc-shaped unit cells connected in an array arrangement, and the arc-shaped unit cells have two supporting parts that can be folded with each other; under the folded state, every the support part forms at least one-level bearing structure and both ends support respectively in first arc curb plate with second arc curb plate.
3. The arc-shaped unit according to claim 2, wherein the arc-shaped unit cells have straight creases parallel to each other and middle saw-tooth creases and side saw-tooth creases arranged along the extending direction of the straight creases in a planar state, the middle saw-tooth creases divide the arc-shaped unit cells into two support portions, and the top angles corresponding to the middle saw-tooth creases and the side saw-tooth creases are not equal to each other.
4. The arc-shaped unit according to claim 3, wherein the straight creases are equal in length and are arranged at equal intervals, and the two portions of the straight creases on the side edges, which are divided by the middle saw-tooth crease, are equal in length.
5. The arc unit of claim 3, wherein no saw-toothed fold is provided between the middle saw-toothed fold and the side saw-toothed fold corresponding to the support portion to form a one-stage support structure, or an even number of derived saw-toothed folds arranged along the extension direction of the straight fold to form at least two-stage support structure; the two sides of all the saw-tooth folds are symmetrical with respect to the straight fold located in the middle.
6. The arc-shaped unit according to any one of claims 3 to 5, wherein in the folded state, the vertex angle corresponding to the end of the side sawtooth folding line, the vertex angle formed by folding the side sawtooth folding line, the vertex angle corresponding to the end of the middle sawtooth folding line and the vertex angle formed by folding the middle sawtooth folding line are respectively positioned on a cylindrical surface, and all the cylindrical surfaces are coaxial.
7. The arc-shaped unit according to claim 6, wherein the distance between the vertex angle and the axis corresponding to the cylindrical surface satisfies the following relation:
r 3 -r 1 -t 1 /2≤t 2 /2；
r 4 -r 2 -t 1 /2≤t 2 /2；
wherein r is 1 The radius of the cylindrical surface where the vertex angle of the end part corresponding to the side sawtooth crease is located; r is 2 The radius of the cylindrical surface where the vertex angle of the end part corresponding to the middle sawtooth crease is located; r is 3 The radius of the cylindrical surface where the vertex angle formed by folding the side sawtooth crease is located; r is a radical of hydrogen 4 The radius of the cylindrical surface where the vertex angle formed by folding the middle sawtooth crease is located; t is t 1 The thickness of the arc-shaped unit cell is set; t is t 2 The thickness of the first arc-shaped side plate or the second arc-shaped side plate is set.
8. The arc unit of claim 1, wherein the first arc side plate, the second arc side plate, and the middle plate layer are integrally formed therebetween.
9. An arc-shaped protective structure, which is characterized by comprising an arc-shaped flexible substrate and a plurality of arc-shaped units according to any one of claims 1 to 8, wherein the arc-shaped units are laid on at least one side surface of the arc-shaped flexible substrate.
10. The arcuate containment structure of claim 9, wherein said arcuate cells are periodically arranged and staggered one above the other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110541432.3A CN115363296A (en) | 2021-05-18 | 2021-05-18 | Arc unit and arc protective structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110541432.3A CN115363296A (en) | 2021-05-18 | 2021-05-18 | Arc unit and arc protective structure |
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| Publication Number | Publication Date |
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| CN115363296A true CN115363296A (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110541432.3A Pending CN115363296A (en) | 2021-05-18 | 2021-05-18 | Arc unit and arc protective structure |
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| Country | Link |
|---|---|
| CN (1) | CN115363296A (en) |
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2021
- 2021-05-18 CN CN202110541432.3A patent/CN115363296A/en active Pending
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