Friction generator with a foldable structure

Abstract

The present invention discloses a triboelectric generator with a foldable structure, comprising: a base layer, a first electrode layer and a second electrode layer. The triboelectric generator with a foldable structure provided by the present invention forms a friction foldable structure of the triboelectric generator by folding the base layer with certain hardness, foldability and elasticity, which not only greatly reduces the difficulty of assembling the triboelectric generator in layers, but also solves the problems of layer misalignment and offset that are prone to occur in the triboelectric generator with a multi-layer structure over time, increases the stability of the triboelectric generator, extends the service life of the triboelectric generator, and at the same time, also realizes the automatic spring-back effect of the structure when no pressure acts on the triboelectric generator through this friction foldable structure, ensuring the stability of the triboelectric generator during the contact-separation process.

Description

Technical Field

[0001] The present invention relates to the technical field of triboelectric power generation, and particularly relates to a triboelectric generator with a foldable structure. Background Art

[0002] With the continuous improvement of modern living standards and the accelerating pace of life, self-powered devices that are convenient to use and have low dependence on the environment have emerged. Existing self-powered devices usually utilize the piezoelectric characteristics of materials. For example, in 2006, Professor Zhong Lin Wang of the Georgia Institute of Technology in the United States successfully converted mechanical energy into electrical energy at the nanoscale and developed the world's smallest generator - the nanogenerator. The basic principle of the nanogenerator is that when nanowires (NWs) are dynamically stretched under an external force, a piezoelectric potential is generated in the nanowires, and the corresponding transient current flows at both ends to balance the Fermi level.

[0003] When objects rub against each other, one will be negatively charged and the other will be positively charged. The electricity generated due to friction between objects is called triboelectricity. Triboelectricity is one of the most common phenomena in nature, but it has been ignored because it is difficult to collect and utilize. If triboelectricity can be applied to self-powered devices, it will surely bring more convenience to people's lives.

[0004] The triboelectric generators in the prior art are generally assembled by laminating at least three or more layers of triboelectric materials. However, when preparing or producing the triboelectric generators in the prior art, each layer of material needs to be processed and assembled separately, which makes the process very cumbersome and costly. Especially during the assembly process, due to the different sizes of each layer of material, the alignment and fixation of multiple layers of materials become a difficulty in the assembly and production of triboelectric generators. In addition, for the triboelectric generators with a multi-layer structure prepared by the method of processing and assembling each layer of material separately, problems such as misalignment and offset are likely to occur as the use time extends, thus affecting the power generation performance and service life of the triboelectric generators. In addition, the triboelectric generators in the prior art also have the problem of poor resilience.

[0005] Therefore, there is a lack of a triboelectric generator in the prior art that can solve the problems of difficult hierarchical assembly of the triboelectric generators in the prior art, easy occurrence of misalignment and offset of the triboelectric generators with a multi-layer structure as the use time extends, which affects the power generation performance and service life of the triboelectric generators, and the problem that the triboelectric generators cannot stably contact and separate. Summary of the Invention

[0006] The present invention provides a triboelectric generator with a foldable structure, which is used to solve the problems of difficult hierarchical assembly of the triboelectric generators in the prior art, easy occurrence of misalignment and offset of the triboelectric generators with a multi-layer structure as the use time extends, which affects the power generation performance and service life of the triboelectric generators, and the problem that the triboelectric generators cannot stably contact and separate.

[0007] According to one aspect of the present invention, there is provided a triboelectric generator having a foldable structure, comprising: a base layer, a first electrode layer, and a second electrode layer; wherein,

[0008] The base layer has a first fold line, a second fold line, and a third fold line; after folding according to the first fold line, the second fold line, and the third fold line, a first combined friction layer and a second combined friction layer are formed on the first side surface of the base layer; the first combined friction layer and the first side surface of the base layer opposite thereto come into contact and friction with each other to form a friction interface; the second combined friction layer and the first side surface of the base layer opposite thereto come into contact and friction with each other to form a friction interface;

[0009] The first electrode layer and the second electrode layer are disposed on the second side surface of the base layer, and the first electrode layer and / or the second electrode layer serve as the output end of the triboelectric generator having a foldable structure.

[0010] Optionally, the first fold line and the second fold line divide the base layer into four setting areas; the third fold line further divides the first setting area and the second setting area at diagonal positions on the base layer into four combined setting areas;

[0011] After folding according to the first fold line, the second fold line, and the third fold line, the first combined setting area and the second combined setting area on the first side surface of the base layer are pieced together to form a first combined friction layer, the first combined friction layer is disposed opposite to the third setting area on the first side surface of the base layer, the third combined setting area and the fourth combined setting area on the first side surface of the base layer are pieced together to form a second combined friction layer, and the second combined friction layer is disposed opposite to the fourth setting area on the first side surface of the base layer;

[0012] The third setting area on the first side surface of the base layer and the first combined friction layer and / or the fourth setting area on the first side surface of the base layer where the second combined friction layer is located come into contact and friction with each other to form a friction interface;

[0013] The first electrode layer and the second electrode layer are respectively disposed on the third setting area and the fourth setting area of the second side surface of the base layer.

[0014] Optionally, the triboelectric generator having a foldable structure further comprises: a first friction layer and / or a second friction layer;

[0015] The first friction layer is disposed on the third setting area of the first side surface of the base layer, the first friction layer is disposed opposite to the first combined friction layer, and the first friction layer and the first combined friction layer come into contact and friction with each other to form a friction interface;

[0016] The second friction layer is disposed on the fourth setting area of the first side surface of the base layer. The second friction layer is disposed opposite to the second combined friction layer, and the second friction layer and the second combined friction layer are in contact and friction with each other to form a friction interface.

[0017] Optionally, the triboelectric generator with a folding structure further includes: a third friction layer and / or a fourth friction layer;

[0018] The third friction layer is disposed on the first combined friction layer of the first side surface of the base layer. The third friction layer is disposed opposite to the third setting area of the first side surface of the base layer, and the third friction layer and the third setting area of the first side surface of the base layer are in contact and friction with each other to form a friction interface;

[0019] The fourth friction layer is disposed on the second combined friction layer of the first side surface of the base layer. The fourth friction layer is disposed opposite to the fourth setting area of the first side surface of the base layer, and the fourth friction layer and the fourth setting area of the first side surface of the base layer are in contact and friction with each other to form a friction interface.

[0020] Optionally, the triboelectric generator with a folding structure further includes: a first friction layer, a second friction layer, a third friction layer, and a fourth friction layer;

[0021] The first friction layer is disposed on the third setting area of the first side surface of the base layer. The third friction layer is disposed on the first combined friction layer of the first side surface of the base layer. The first friction layer is disposed opposite to the third friction layer, and the first friction layer and the third friction layer are in contact and friction with each other to form a friction interface;

[0022] The second friction layer is disposed on the fourth setting area of the first side surface of the base layer. The fourth friction layer is disposed on the second combined friction layer of the first side surface of the base layer. The second friction layer is disposed opposite to the fourth friction layer, and the second friction layer and the fourth friction layer are in contact and friction with each other to form a friction interface.

[0023] Optionally, the materials of the first friction layer and the third friction layer are different, and / or the materials of the second friction layer and the fourth friction layer are different.

[0024] Optionally, the triboelectric generator with a folding structure further includes: a third electrode layer and a fourth electrode layer;

[0025] The third electrode layer and the fourth electrode layer are respectively disposed on the first setting area and the second setting area of the second side surface of the base layer;

[0026] The first electrode layer, the second electrode layer, the third electrode layer, and / or the fourth electrode layer serve as the output terminals of the triboelectric generator with a folding structure.

[0027] Optionally, a raised array structure is provided on at least one of the two surfaces constituting the friction interface.

[0028] Optionally, the first folding line and the second folding line intersect perpendicularly, the third folding line passes through the intersection of the first folding line and the second folding line, and the third folding line coincides with the angle bisectors of a set of opposite angles formed by the perpendicular intersection of the first folding line and the second folding line.

[0029] Optionally, the four setting areas of the base layer have the same shape and size, and the four combined setting areas of the base layer have the same shape and size; or,

[0030] The four setting areas of the base layer have the same shape and size, and any two combined setting areas at diagonal positions on the base layer have the same shape and size; or,

[0031] Any two setting areas at diagonal positions on the base layer have the same shape and size, and the four combined setting areas of the base layer have the same shape and size.

[0032] Optionally, the first folding line, the second folding line, and the third folding line are folded toward the first side surface direction of the base layer.

[0033] Optionally, the shape of the base layer is square, rectangular, or circular.

[0034] Optionally, when the shape of the base layer is square and the first folding line and the second folding line divide the base layer into four square setting areas with the same shape and size, after folding according to the first folding line, the second folding line, and the third folding line, the shapes and sizes of the first combined friction layer and the second combined friction layer are the same as those of the third setting area and the fourth setting area of the base layer, and the vertical projection of the friction generator with a folding structure is square; or,

[0035] When the shape of the base layer is square and the first folding line and the second folding line divide the base layer into four isosceles right triangle setting areas with the same shape and size, after folding according to the first folding line, the second folding line, and the third folding line, the shapes and sizes of the first combined friction layer and the second combined friction layer are the same as those of the third setting area and the fourth setting area of the base layer, and the vertical projection of the friction generator with a folding structure is an isosceles right triangle.

[0036] Optionally, the base layer is a flexible insulating material; the base layer is any one of polyethylene terephthalate, polyvinyl chloride, polypropylene, and polyethylene.

[0037] The triboelectric generator with a foldable structure provided by the present invention forms a friction foldable structure of the triboelectric generator by folding a base layer with a certain hardness, foldability and elasticity, which not only greatly reduces the difficulty of assembling the layered triboelectric generator, but also solves the problems of layer misalignment and offset that are prone to occur in the triboelectric generator with a multi-layer structure over time, increases the stability of the triboelectric generator, extends the service life of the triboelectric generator. At the same time, the automatic spring-back effect of the structure when no pressure acts on the triboelectric generator is also realized through this friction foldable structure, ensuring the stability of the triboelectric generator during the contact-separation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1a , Figure 1b , Figure 1c and Figure 1d are respectively the schematic diagram of the folding structure of the base layer, the front structure schematic diagram after folding and unfolding, the back structure schematic diagram after folding and unfolding, and the side structure schematic diagram after folding and unfolding of the first embodiment of the triboelectric generator with a foldable structure provided by the present invention;

[0039] Figure 2a , Figure 2b , Figure 2c and Figure 2d are respectively the schematic diagram of the folding structure of the base layer, the front structure schematic diagram after folding and unfolding, the back structure schematic diagram after folding and unfolding, and the side structure schematic diagram after folding and unfolding of the second embodiment of the triboelectric generator with a foldable structure provided by the present invention;

[0040] Figure 3a , Figure 3b and Figure 3c are respectively the front structure schematic diagram after folding and unfolding, the back structure schematic diagram after folding and unfolding, and the side structure schematic diagram after folding and unfolding of the third embodiment of the triboelectric generator with a foldable structure provided by the present invention;

[0041] Figure 4a , Figure 4b and Figure 4c are respectively the front structure schematic diagram after folding and unfolding, the back structure schematic diagram after folding and unfolding, and the side structure schematic diagram after folding and unfolding of the fourth embodiment of the triboelectric generator with a foldable structure provided by the present invention;

[0042] Figure 5a , Figure 5b , Figure 5c and Figure 5d are respectively the schematic diagram of the folding structure of the base layer, the front structure schematic diagram after folding and unfolding, the back structure schematic diagram after folding and unfolding, and the side structure schematic diagram after folding and unfolding of the fifth embodiment of the triboelectric generator with a foldable structure provided by the present invention;

[0043] Figure 6a Schematic diagram of one reverse side structure after folding and unfolding of Embodiment 1 of the triboelectric generator with a foldable structure provided by the present invention;

[0044] Figure 6b Schematic diagram of one reverse side structure after folding and unfolding of Embodiment 2 of the triboelectric generator with a foldable structure provided by the present invention. Specific embodiments

[0045] In order to fully understand the purpose, features and effects of the present invention, the present invention will be described in detail through the following specific embodiments, but the present invention is not limited thereto.

[0046] To solve the problems that the layered assembly of the triboelectric generator in the prior art is difficult, the multi-layer structure of the triboelectric generator is prone to layer misalignment and offset with the extension of the service time, which affects the power generation performance and service life of the triboelectric generator, and the triboelectric generator cannot stably contact and separate.

[0047] The present invention provides a triboelectric generator with a foldable structure, including: a base layer, a first electrode layer and a second electrode layer; wherein, the base layer has a first fold line, a second fold line and a third fold line; after folding according to the first fold line, the second fold line and the third fold line, a first combined friction layer and a second combined friction layer are formed on the first side surface of the base layer; the first combined friction layer and the first side surface of the base layer opposite thereto are in contact and friction with each other to form a friction interface; the second combined friction layer and the first side surface of the base layer opposite thereto are in contact and friction with each other to form a friction interface; the first electrode layer and the second electrode layer are arranged on the second side surface of the base layer, and the first electrode layer and / or the second electrode layer serve as the output end of the triboelectric generator with a foldable structure.

[0048] Specifically, the first folding line and the second folding line divide the base layer into four setting areas; the third folding line further divides the first setting area and the second setting area at the diagonal positions on the base layer into four combined setting areas; after folding according to the first folding line, the second folding line and the third folding line, the first combined setting area and the second combined setting area on the first side surface of the base layer are pieced together to form a first combined friction layer which is relatively arranged with the third setting area on the first side surface of the base layer, and the third combined setting area and the fourth combined setting area on the first side surface of the base layer are pieced together to form a second combined friction layer which is relatively arranged with the fourth setting area on the first side surface of the base layer; the third setting area on the first side surface of the base layer contacts and rubs with the first combined friction layer and / or the second combined friction layer contacts and rubs with the fourth setting area on the first side surface of the base layer to form a friction interface; the first electrode layer and the second electrode layer are respectively arranged on the third setting area and the fourth setting area on the second side surface of the base layer, and the first electrode layer and / or the second electrode layer serve as the output end of the friction generator with a folding structure.

[0049] Among them, the shape of the base layer can be square, rectangular, circular, etc. Those skilled in the art can select a base layer of any shape according to actual needs, and no limitation is made here.

[0050] In order to enable those skilled in the art to more clearly understand the friction generator with a folding structure provided by the present invention, the friction generator with a folding structure provided by the present invention will be introduced in detail through Embodiment 1 to Embodiment 5 below, but the present invention is not limited thereto.

[0051] Embodiment 1

[0052] Figure 1a 、 Figure 1b 、 Figure 1c and Figure 1d are respectively the folding structure schematic diagram, the front structure schematic diagram after folding and unfolding, the back structure schematic diagram after folding and unfolding, and the side structure schematic diagram after folding and unfolding of the base layer of Embodiment 1 of the friction generator with a folding structure provided by the present invention. As Figure 1a to Figure 1d shown, the friction generator with a folding structure includes: a base layer 1, a first electrode layer 2 and a second electrode layer 3.

[0053] Among them, the base layer 1 is square in shape and has a first folding line 101, a second folding line 102, and a third folding line 103 thereon; the first folding line 101 and the second folding line 102 divide the base layer 1 into four square setting areas with the same shape and size, namely a first setting area, a second setting area, a third setting area, and a fourth setting area; the third folding line 103 further divides the first setting area and the second setting area at diagonal positions on the base layer 1 into four isosceles right triangle combined setting areas with the same shape and size, namely a first combined setting area, a second combined setting area, a third combined setting area, and a fourth combined setting area.

[0054] It should be understood that the first folding line 101, the second folding line 102, and the third folding line 103 on the base layer 1 not only divide the first side surface of the base layer 1 into four square setting areas with the same shape and size, namely a first setting area 11, a second setting area 12, a third setting area 13, and a fourth setting area 14, but also divide the second side surface of the base layer 1 into four square setting areas with the same shape and size, namely a first setting area 21, a second setting area 22, a third setting area (not marked in the figure), and a fourth setting area (not marked in the figure), as specifically shown in Figure 1b and Figure 1c shown. Similarly, the third folding line 103 not only further divides the first setting area 11 and the second setting area 12 at diagonal positions on the first side surface of the base layer 1 into four isosceles right triangle combined setting areas with the same shape and size, namely a first combined setting area 111, a second combined setting area 121, a third combined setting area 112, and a fourth combined setting area 122, but also further divides the first setting area 21 and the second setting area 22 at diagonal positions on the second side surface of the base layer 1 into four isosceles right triangle combined setting areas (not marked in the figure).

[0055] Combined with Figures 1a to 1d After folding towards the first side surface of the base layer 1 according to the first folding line 101, the second folding line 102, and the third folding line 103, the first combined setting area 111 and the second combined setting area 121 on the first side surface of the base layer 1 are pieced together to form a first combined friction layer 15 which is arranged opposite to the third setting area 13 on the first side surface of the base layer 1, and the third combined setting area 112 and the fourth combined setting area 122 on the first side surface of the base layer 1 are pieced together to form a second combined friction layer (not marked in the figure) which is arranged opposite to the fourth setting area 14 on the first side surface of the base layer 1. At this time, the third setting area 13 on the first side surface of the base layer 1 and the first combined friction layer 15 and / or the second combined friction layer and the fourth setting area 14 on the first side surface of the base layer 1 are in contact and friction with each other to form a friction interface.

[0056] As shown Figure 1c in the figure, the first electrode layer 2 and the second electrode layer 3 are respectively disposed on the third setting area and the fourth setting area of the second side surface of the base layer 1; and the first electrode layer 2 and the second electrode layer 3 do not contact each other, and the first electrode layer 2 and / or the second electrode layer 3 serve as the output end of the friction generator having a folded structure.

[0057] As shown Figures 1a to 1d in the figure, in this embodiment, the first folding line 101 and the second folding line 102 are perpendicular to each other and intersect. The first folding line 101 and the first folding line 101 are parallel to a group of sides of the base layer 1 without intersection points, and the second folding line 102 and the second folding line 102 are parallel to a group of sides of the base layer 1 without intersection points. The third folding line 103 passes through the intersection point of the first folding line 101 and the second folding line 102, and the third folding line 103 coincides with the angle bisectors of a group of opposite angles formed after the third folding line 103 and the first folding line 101 and the second folding line 102 are perpendicular to each other and intersect. In this way, it can accurately ensure that the first setting area and the second setting area at the diagonal positions on the base layer 1 are further divided into four isosceles right triangle combined setting areas with the same shape and size.

[0058] Specifically, as shown Figures 1a to 1dAs shown, in this embodiment, the first folding line 101 and the second folding line 102 divide the base layer 1 into four square setting areas with the same shape and size; the third folding line 103 passes through the intersection of the first folding line 101 and the second folding line 102, and it coincides with the angle bisectors of a set of opposite angles formed by the perpendicular intersection of the first folding line 101 and the second folding line 102, so as to further divide the first setting area and the second setting area at the diagonal positions on the base layer 1 into four isosceles right triangle combined setting areas with the same shape and size; after folding the first folding line 101, the second folding line 102 and the third folding line 103 towards the first side surface of the base layer 1, the first combined setting area 111 and the second combined setting area 121 on the first side surface of the base layer 1 are pieced together to form a first combined friction layer 15 which is disposed opposite to the third setting area 13 on the first side surface of the base layer 1, and the third combined setting area 112 and the fourth combined setting area 122 on the first side surface of the base layer 1 are pieced together to form a second combined friction layer which is disposed opposite to the fourth setting area 14 on the first side surface of the base layer 1. The third setting area 13 on the first side surface of the base layer 1 contacts and rubs against the first combined friction layer 15 and / or the second combined friction layer and the fourth setting area 14 on the first side surface of the base layer 1 to form a friction interface. At this time, the shapes and sizes of the first combined friction layer 15 and the second combined friction layer are the same as those of the third setting area 13 and the fourth setting area 14 of the base layer 1, that is, squares of the same size; the first electrode layer 2 and the second electrode layer 3 are respectively disposed on the third setting area and the fourth setting area on the second side surface of the base layer 1, and the first electrode layer 2 and the second electrode layer 3 do not contact each other. The first electrode layer 2 and / or the second electrode layer 3 serve as the output terminals of the friction generator with a folded structure. That is to say, the vertical projection of the friction generator with a folded structure in this embodiment is a square.

[0059] Embodiment 2

[0060] Figure 2a 、 Figure 2b 、 Figure 2c and Figure 2d are respectively the folding structure schematic diagram of the base layer, the front structure schematic diagram after folding and unfolding, the back structure schematic diagram after folding and unfolding, and the side structure schematic diagram after folding and unfolding of the friction generator with a folded structure provided by the present invention in Embodiment 2. As Figure 2a to Figure 2d shown, the friction generator with a folded structure includes: a base layer 1, a first electrode layer 2 and a second electrode layer 3.

[0061] Among them, the base layer 1 is square in shape and has a first folding line 101, a second folding line 102, and a third folding line 103 thereon; the first folding line 101 and the second folding line 102 divide the base layer 1 into four isosceles right triangle setting areas with the same shape and size, namely a first setting area, a second setting area, a third setting area, and a fourth setting area; the third folding line 103 further divides the first setting area and the second setting area at diagonal positions on the base layer 1 into four isosceles right triangle combined setting areas with the same shape and size, namely a first combined setting area, a second combined setting area, a third combined setting area, and a fourth combined setting area.

[0062] It should be understood that the first folding line 101, the second folding line 102, and the third folding line 103 on the base layer 1 not only divide the first side surface of the base layer 1 into four isosceles right triangle setting areas with the same shape and size, namely a first setting area 11, a second setting area 12, a third setting area 13, and a fourth setting area 14, but also divide the second side surface of the base layer 1 into four isosceles right triangle setting areas with the same shape and size, namely a first setting area 21, a second setting area 22, a third setting area (not marked in the figure), and a fourth setting area (not marked in the figure), as specifically shown in Figure 2b and Figure 2c shown. Similarly, the third folding line 103 not only further divides the first setting area 11 and the second setting area 12 at diagonal positions on the first side surface of the base layer 1 into four isosceles right triangle combined setting areas with the same shape and size, namely a first combined setting area 111, a second combined setting area 121, a third combined setting area 112, and a fourth combined setting area 122, but also further divides the first setting area 21 and the second setting area 22 at diagonal positions on the second side surface of the base layer 1 into four isosceles right triangle combined setting areas (not marked in the figure).

[0063] Combined with Figures 2a to 2d , after folding the base layer 1 towards the first side surface according to the first folding line 101, the second folding line 102, and the third folding line 103, the first combined setting area 111 and the second combined setting area 121 on the first side surface of the base layer 1 are pieced together to form a first combined friction layer 15 and are disposed opposite to the third setting area 13 on the first side surface of the base layer 1. The third combined setting area 112 and the fourth combined setting area 122 on the first side surface of the base layer 1 are pieced together to form a second combined friction layer (not marked in the figure) and are disposed opposite to the fourth setting area 14 on the first side surface of the base layer 1. At this time, the third setting area 13 on the first side surface of the base layer 1 and the first combined friction layer 15 and / or the second combined friction layer and the fourth setting area 14 on the first side surface of the base layer 1 are in contact and friction with each other to form a friction interface.

[0064] As shown Figure 2c in the figure, the first electrode layer 2 and the second electrode layer 3 are respectively disposed on the third setting area and the fourth setting area of the second side surface of the base layer 1; and the first electrode layer 2 and the second electrode layer 3 do not contact each other, and the first electrode layer 2 and / or the second electrode layer 3 serve as the output end of the triboelectric generator with a folded structure.

[0065] As shown Figures 2a to 2d in the figure, in this embodiment, the first folding line 101 and the second folding line 102 intersect perpendicularly. Specifically, the first folding line 101 and the second folding line 102 are two diagonals of the square base layer 1, and the third folding line 103 passes through the intersection point of the first folding line 101 and the second folding line 102, and the third folding line 103 coincides with the angle bisectors of a set of opposite angles formed after perpendicular intersection with the first folding line 101 and the second folding line 102, so as to accurately ensure that the first setting area and the second setting area at the diagonal positions on the base layer 1 are further divided into four isosceles right triangle combined setting areas with the same shape and size.

[0066] Specifically, as shown Figures 2a to 2dAs shown, in this embodiment, the first folding line 101 and the second folding line 102 divide the base layer 1 into four isosceles right triangle setting areas with the same shape and size; the third folding line 103 passes through the intersection point of the first folding line 101 and the second folding line 102, and coincides with the angle bisectors of a set of opposite angles formed by the perpendicular intersection of the first folding line 101 and the second folding line 102, thereby further dividing the first setting area and the second setting area at the diagonal positions on the base layer 1 into four isosceles right triangle combined setting areas with the same shape and size; after folding the base layer 1 along the first folding line 101, the second folding line 102 and the third folding line 103 towards the first side surface of the base layer 1, the first combined setting area 111 and the second combined setting area 121 on the first side surface of the base layer 1 are pieced together to form a first combined friction layer 15 which is arranged opposite to the third setting area 13 on the first side surface of the base layer 1, and the third combined setting area 112 and the fourth combined setting area 122 on the first side surface of the base layer 1 are pieced together to form a second combined friction layer which is arranged opposite to the fourth setting area 14 on the first side surface of the base layer 1; the third setting area 13 on the first side surface of the base layer 1 and the first combined friction layer 15 and / or the second combined friction layer and the fourth setting area 14 on the first side surface of the base layer 1 are in contact and friction with each other to form a friction interface. At this time, the shapes and sizes of the first combined friction layer 15 and the second combined friction layer are the same as those of the third setting area 13 and the fourth setting area 14 of the base layer 1, that is, isosceles right triangles of the same size; the first electrode layer 2 and the second electrode layer 3 are respectively arranged on the third setting area and the fourth setting area on the second side surface of the base layer 1, and the first electrode layer 2 and the second electrode layer 3 do not contact each other. The first electrode layer 2 and / or the second electrode layer 3 serve as the output terminals of the friction generator with a folding structure. That is to say, the vertical projection of the friction generator with a folding structure in this embodiment is an isosceles right triangle.

[0067] Embodiment III

[0068] Figure 3a 、 Figure 3b and Figure 3c are respectively the front structure schematic diagram, the back structure schematic diagram and the side structure schematic diagram after folding and unfolding of Embodiment III of the friction generator with a folding structure provided by the present invention. As Figures 3a to 3c shown, the friction generator with a folding structure includes: a base layer 1, a first electrode layer 2 and a second electrode layer 3.

[0069] Among them, the shape of the base layer 1 is rectangular, and it has a first folding line 101, a second folding line 102, and a third folding line 103; the first folding line 101 and the second folding line 102 divide the base layer 1 into four rectangular setting areas with the same shape and size, namely a first setting area, a second setting area, a third setting area, and a fourth setting area; the third folding line 103 further divides the first setting area and the second setting area at the diagonal positions on the base layer 1 into four combined setting areas, namely a first combined setting area, a second combined setting area, a third combined setting area, and a fourth combined setting area, and any two combined setting areas at the diagonal positions among these four combined setting areas have the same shape and size.

[0070] It should be understood that the first folding line 101, the second folding line 102, and the third folding line 103 on the base layer 1 not only divide the first side surface of the base layer 1 into four rectangular setting areas with the same shape and size, namely a first setting area 11, a second setting area 12, a third setting area 13, and a fourth setting area 14, but also divide the second side surface of the base layer 1 into four rectangular setting areas with the same shape and size, namely a first setting area 21, a second setting area 22, a third setting area (not marked in the figure), and a fourth setting area (not marked in the figure), as specifically shown in Figure 3a and Figure 3b the figure. Similarly, the third folding line 103 not only further divides the first setting area 11 and the second setting area 12 at the diagonal positions on the first side surface of the base layer 1 into four combined setting areas, namely a first combined setting area 111, a second combined setting area 121, a third combined setting area 112, and a fourth combined setting area 122, (wherein, the first combined setting area 111 and the fourth combined setting area 122 have the same shape and size, and the second combined setting area 121 and the third combined setting area have the same shape and size), but also divides the first setting area 21 and the second setting area 22 at the diagonal positions on the second side surface of the base layer 1 into four combined setting areas (not marked in the figure).

[0071] Combined with Figures 3a to 3c, after being folded towards the first side surface of the base layer 1 according to the first folding line 101, the second folding line 102, and the third folding line 103, the first combined setting area 111 and the second combined setting area 121 on the first side surface of the base layer 1 are pieced together to form a first combined friction layer (not marked in the figure) and are disposed opposite to the third setting area 13 on the first side surface of the base layer 1. The third combined setting area 112 and the fourth combined setting area 122 on the first side surface of the base layer 1 are pieced together to form a second combined friction layer (not marked in the figure) and are disposed opposite to the fourth setting area 14 on the first side surface of the base layer 1. At this time, the third setting area 13 on the first side surface of the base layer 1 and the first combined friction layer and / or the second combined friction layer and the fourth setting area 14 on the first side surface of the base layer 1 are in contact with each other and rub to form a friction interface.

[0072] As Figure 3b shown, the first electrode layer 2 and the second electrode layer 3 are respectively disposed on the third setting area and the fourth setting area on the second side surface of the base layer 1; and the first electrode layer 2 and the second electrode layer 3 do not contact each other, and the first electrode layer 2 and / or the second electrode layer 3 serve as the output terminals of the friction generator having a folded structure.

[0073] As Figures 3a to 3c shown, in this embodiment, the first folding line 101 and the second folding line 102 intersect perpendicularly. The first folding line 101 and the first folding line 101 are parallel to a set of sides of the base layer 1 without intersection points. The second folding line 102 and the second folding line 102 are parallel to a set of sides of the base layer 1 without intersection points. The third folding line 103 passes through the intersection point of the first folding line 101 and the second folding line 102, and the third folding line 103 coincides with the angle bisectors of a set of opposite angles formed by the perpendicular intersection of the third folding line 103 and the first folding line 101 and the second folding line 102. In this way, it can accurately ensure that the first setting area and the second setting area at the diagonal positions on the base layer 1 are further divided into four combined setting areas, and ensure that the shapes and sizes of any two combined setting areas at the diagonal positions in the four combined setting areas are the same, that is, the shape and size of the first combined setting area 111 are the same as those of the fourth combined setting area 122, and the shape and size of the second combined setting area 121 are the same as those of the third combined setting area 112.

[0074] Specifically, as Figures 3a to 3cAs shown, in this embodiment, the first folding line 101 and the second folding line 102 divide the base layer 1 into four rectangular setting areas with the same shape and size; the third folding line 103 passes through the intersection of the first folding line 101 and the second folding line 102, and coincides with the angular bisector of a set of opposite angles formed by their perpendicular intersection, thereby further dividing the first setting area and the second setting area at the diagonal positions on the base layer 1 into four combined setting areas, and any two combined setting areas at the diagonal positions in the four combined setting areas have the same shape and size; after folding the base layer 1 along the first folding line 101, the second folding line 102 and the third folding line 103 towards the first side surface of the base layer 1, the first combined setting area 111 and the second combined setting area 121 on the first side surface of the base layer 1 are pieced together to be oppositely arranged with the third setting area 13 on the first side surface of the base layer 1, and the third combined setting area 112 and the fourth combined setting area 122 on the first side surface of the base layer 1 are pieced together to be oppositely arranged with the fourth setting area 14 on the first side surface of the base layer 1. The third setting area 13 on the first side surface of the base layer 1 and the first combined friction layer and / or the second combined friction layer and the fourth setting area 14 on the first side surface of the base layer 1 are in contact and friction with each other to form a friction interface. At this time, the shapes and sizes of the first combined friction layer and the second combined friction layer are the same as those of the third setting area 13 and the fourth setting area 14 of the base layer 1, that is, rectangles of the same size; the first electrode layer 2 and the second electrode layer 3 are respectively arranged on the third setting area and the fourth setting area on the second side surface of the base layer 1, and the first electrode layer 2 and the second electrode layer 3 do not contact each other. The first electrode layer 2 and / or the second electrode layer 3 serve as the output terminals of the friction generator with a folded structure.

[0075] Embodiment 4

[0076] Figure 4a 、 Figure 4b and Figure 4c are respectively the front structure schematic diagram, the back structure schematic diagram and the side structure schematic diagram after folding and unfolding of Embodiment 4 of the friction generator with a folded structure provided by the present invention. As Figures 4a to 4c shown, the friction generator with a folded structure includes: a base layer 1, a first electrode layer 2 and a second electrode layer 3.

[0077] Among them, the shape of the base layer 1 is rectangular, and it has a first folding line 101, a second folding line 102, and a third folding line 103 thereon; the first folding line 101 and the second folding line 102 divide the base layer 1 into four setting areas, namely a first setting area, a second setting area, a third setting area, and a fourth setting area, and any two of the four setting areas in the diagonal positions have the same shape and size; the third folding line 103 further divides the first setting area and the second setting area in the diagonal positions on the base layer 1 into four combined setting areas with the same shape and size, namely a first combined setting area, a second combined setting area, a third combined setting area, and a fourth combined setting area.

[0078] It should be understood that the first folding line 101, the second folding line 102, and the third folding line 103 on the base layer 1 not only divide the first side surface of the base layer 1 into four setting areas, namely a first setting area 11, a second setting area 12, a third setting area 13, and a fourth setting area 14, and any two of the four setting areas in the diagonal positions have the same shape and size (that is, the first setting area 111 and the second setting area 121 have the same shape and size, and the third setting area 112 and the fourth setting area 122 have the same shape and size), but also divide the second side surface of the base layer 1 into four setting areas, namely a first setting area 21, a second setting area 22, a third setting area (not marked in the figure), and a fourth setting area (not marked in the figure), and any two of the four setting areas in the diagonal positions have the same shape and size (that is, the first setting area 21 and the second setting area 22 have the same shape and size, and the third setting area and the fourth setting area have the same shape and size), specifically as Figure 4a and Figure 4b shown. Similarly, the third folding line 103 not only further divides the first setting area 11 and the second setting area 12 in the diagonal positions on the first side surface of the base layer 1 into four combined setting areas with the same shape and size, namely a first combined setting area 111, a second combined setting area 121, a third combined setting area 112, and a fourth combined setting area 122, but also further divides the first setting area 21 and the second setting area 22 in the diagonal positions on the second side surface of the base layer 1 into four combined setting areas with the same shape and size (not marked in the figure).

[0079] Combined with Figures 4a to 4c, after folding along the first folding line 101, the second folding line 102, and the third folding line 103 towards the first side surface of the base layer 1, the first combined setting area 111 and the second combined setting area 121 on the first side surface of the base layer 1 are pieced together to form a first combined friction layer (not marked in the figure) that is disposed opposite to the third setting area 13 on the first side surface of the base layer 1. The third combined setting area 112 and the fourth combined setting area 122 on the first side surface of the base layer 1 are pieced together to form a second combined friction layer (not marked in the figure) that is disposed opposite to the fourth setting area 14 on the first side surface of the base layer 1. At this time, the third setting area 13 on the first side surface of the base layer 1 and the first combined friction layer and / or the second combined friction layer and the fourth setting area 14 on the first side surface of the base layer 1 are in contact with each other and rub against each other to form a friction interface.

[0080] As Figure 4b shown, the first electrode layer 2 and the second electrode layer 3 are respectively disposed on the third setting area and the fourth setting area on the second side surface of the base layer 1; and the first electrode layer 2 and the second electrode layer 3 do not contact each other, and the first electrode layer 2 and / or the second electrode layer 3 serve as the output terminals of the friction generator having a folded structure.

[0081] As Figures 4a to 4c shown, in this embodiment, the first folding line 101 and the second folding line 102 intersect perpendicularly, and the intersection point of the first folding line 101 and the second folding line 102 passes through the center point of the plane of the rectangular base layer. The third folding line 103 passes through the intersection point of the first folding line 101 and the second folding line 102, and the third folding line 103 coincides with the angle bisectors of a set of opposite angles formed after the third folding line 103 intersects perpendicularly with the first folding line 101 and the second folding line 102. This can accurately ensure that the first setting area and the second setting area at the diagonal positions on the base layer 1 are further divided into four combined setting areas with the same shape and size.

[0082] Specifically, as Figures 4a to 4cAs shown, in this embodiment, the first folding line 101 and the second folding line 102 divide the base layer 1 into four setting areas, and any two of the four setting areas in the diagonal positions have the same shape and size; the third folding line 103 passes through the intersection of the first folding line 101 and the second folding line 102, and it coincides with a set of angular bisectors formed by the perpendicular intersection of the first folding line 101 and the second folding line 102, thereby further dividing the first setting area and the second setting area in the diagonal positions on the base layer 1 into four combined setting areas with the same shape and size; after folding the first folding line 101, the second folding line 102, and the third folding line 103 towards the first side surface of the base layer 1, the first combined setting area 111 and the second combined setting area 121 on the first side surface of the base layer 1 are pieced together to be oppositely arranged with the third setting area 13 on the first side surface of the base layer 1, and the third combined setting area 112 and the fourth combined setting area 122 on the first side surface of the base layer 1 are pieced together to be oppositely arranged with the fourth setting area 14 on the first side surface of the base layer 1. The third setting area 13 on the first side surface of the base layer 1 and the first combined friction layer and / or the second combined friction layer and the fourth setting area 14 on the first side surface of the base layer 1 are in contact and friction with each other to form a friction interface. At this time, the first combined friction layer and the second combined friction layer have the same shape and size, and the third setting area 13 and the fourth setting area 14 of the base layer 1 have the same shape and size; the first electrode layer 2 and the second electrode layer 3 are respectively arranged on the third setting area and the fourth setting area on the second side surface of the base layer 1, and the first electrode layer 2 and the second electrode layer 3 do not contact each other. The first electrode layer 2 and / or the second electrode layer 3 serve as the output terminals of the friction generator with a folding structure.

[0083] Embodiment 5

[0084] Figure 5a 、 Figure 5b 、 Figure 5c and Figure 5d are respectively the folding structure schematic diagram of the base layer, the front structure schematic diagram after folding and unfolding, the back structure schematic diagram after folding and unfolding, and the side structure schematic diagram after folding and unfolding of Embodiment 5 of the friction generator with a folding structure provided by the present invention. As Figure 5a to Figure 5d shown, the friction generator with a folding structure includes: a base layer 1, a first electrode layer 2, and a second electrode layer 3.

[0085] Among them, the shape of the base layer 1 is circular, and it has a first folding line 101, a second folding line 102, and a third folding line 103 thereon; the first folding line 101 and the second folding line 102 divide the base layer 1 into four fan-shaped setting areas with the same shape and size, namely a first setting area, a second setting area, a third setting area, and a fourth setting area; the third folding line 103 further divides the first setting area and the second setting area at diagonal positions on the base layer 1 into four fan-shaped combined setting areas with the same shape and size, namely a first combined setting area, a second combined setting area, a third combined setting area, and a fourth combined setting area.

[0086] It should be understood that the first folding line 101, the second folding line 102, and the third folding line 103 on the base layer 1 not only divide the first side surface of the base layer 1 into four fan-shaped setting areas with the same shape and size, namely a first setting area 11, a second setting area 12, a third setting area 13, and a fourth setting area 14, but also divide the second side surface of the base layer 1 into four fan-shaped setting areas with the same shape and size, namely a first setting area 21, a second setting area 22, a third setting area (not marked in the figure), and a fourth setting area (not marked in the figure), specifically as Figure 5b and Figure 5c shown. Similarly, the third folding line 103 not only further divides the first setting area 11 and the second setting area 12 at diagonal positions on the first side surface of the base layer 1 into four fan-shaped combined setting areas with the same shape and size, namely a first combined setting area 111, a second combined setting area 121, a third combined setting area 112, and a fourth combined setting area 122, but also further divides the first setting area 21 and the second setting area 22 at diagonal positions on the second side surface of the base layer 1 into four fan-shaped combined setting areas (not marked in the figure) with the same shape and size.

[0087] Combined with Figures 5a to 5d , after folding towards the first side surface of the base layer 1 according to the first folding line 101, the second folding line 102, and the third folding line 103, the first combined setting area 111 and the second combined setting area 121 on the first side surface of the base layer 1 are pieced together to form a first combined friction layer 15 which is disposed opposite to the third setting area 13 on the first side surface of the base layer 1, and the third combined setting area 112 and the fourth combined setting area 122 on the first side surface of the base layer 1 are pieced together to form a second combined friction layer (not marked in the figure) which is disposed opposite to the fourth setting area 14 on the first side surface of the base layer 1. At this time, the third setting area 13 on the first side surface of the base layer 1 and the first combined friction layer 15 and / or the second combined friction layer and the fourth setting area 14 on the first side surface of the base layer 1 are in contact and friction with each other to form a friction interface.

[0088] AsFigure 5c As shown, the first electrode layer 2 and the second electrode layer 3 are respectively disposed on the third setting region and the fourth setting region of the second side surface of the base layer 1; and the first electrode layer 2 and the second electrode layer 3 do not contact each other, and the first electrode layer 2 and / or the second electrode layer 3 serve as the output end of the friction generator having a folded structure.

[0089] As Figures 5a to 5d shown, in this embodiment, the first folding line 101 and the second folding line 102 intersect perpendicularly, and the intersection point of the first folding line 101 and the second folding line 102 coincides with the center of the circular base layer 1, and the third folding line 103 passes through the intersection point of the first folding line 101 and the second folding line 102, and the third folding line 103 coincides with the angle bisector of a set of opposite angles formed after perpendicular intersection with the first folding line 101 and the second folding line 102, so as to accurately ensure that the first setting region and the second setting region at the diagonal positions on the base layer 1 are further divided into four sector combined setting regions with the same shape and size.

[0090] Specifically, as Figures 5a to 5dAs shown, in this embodiment, the first folding line 101 and the second folding line 102 divide the base layer 1 into four fan-shaped setting areas with the same shape and size; the third folding line 103 passes through the intersection of the first folding line 101 and the second folding line 102, and coincides with the angle bisector of a set of opposite angles formed by the perpendicular intersection of the first folding line 101 and the second folding line 102, so as to further divide the first setting area and the second setting area at the diagonal positions on the base layer 1 into four fan-shaped combined setting areas with the same shape and size; after folding the first folding line 101, the second folding line 102 and the third folding line 103 towards the first side surface of the base layer 1, the first combined setting area 111 and the second combined setting area 121 on the first side surface of the base layer 1 are pieced together to form a first combined friction layer 15 which is disposed opposite to the third setting area 13 on the first side surface of the base layer 1, and the third combined setting area 112 and the fourth combined setting area 122 on the first side surface of the base layer 1 are pieced together to form a second combined friction layer which is disposed opposite to the fourth setting area 14 on the first side surface of the base layer 1. The third setting area 13 on the first side surface of the base layer 1 and the first combined friction layer 15 and / or the second combined friction layer and the fourth setting area 14 on the first side surface of the base layer 1 are in contact and friction with each other to form a friction interface. At this time, the shapes and sizes of the first combined friction layer 15 and the second combined friction layer are the same as those of the third setting area 13 and the fourth setting area 14 of the base layer 1, that is, the same-sized sectors; the first electrode layer 2 and the second electrode layer 3 are respectively disposed on the third setting area and the fourth setting area on the second side surface of the base layer 1, and the first electrode layer 2 and the second electrode layer 3 do not contact each other. The first electrode layer 2 and / or the second electrode layer 3 serve as the output terminals of the friction generator with a folded structure. That is to say, the vertical projection of the friction generator with a folded structure in this embodiment is a sector.

[0091] In addition, any one of Embodiments 1 to 5 further has four optional implementation manners. That is to say, the four optional implementation manners introduced below can be applied to any one of Embodiments 1 to 5. In the first optional implementation manner, the friction generator with a folded structure in any one of Embodiments 1 to 5 further includes: a first friction layer and / or a second friction layer; the first friction layer is disposed on the third setting area 13 on the first side surface of the base layer, the first friction layer is disposed opposite to the first combined friction layer, and the first friction layer and the first combined friction layer are in contact and friction with each other to form a friction interface; the second friction layer is disposed on the fourth setting area 14 on the first side surface of the base layer, the second friction layer is disposed opposite to the second combined friction layer, and the second friction layer and the second combined friction layer are in contact and friction with each other to form a friction interface.

[0092] It should be understood that for such an alternative embodiment, a first friction layer can be further provided only on the basis of any one of the first to fifth embodiments. At this time, the first friction layer is provided on the third setting area 13 of the first side surface of the base layer. The first friction layer is disposed opposite to the first combined friction layer, and the first friction layer and the first combined friction layer are in contact and friction with each other to form a friction interface. Other descriptions are the same as those of the friction generator with a foldable structure in the embodiment to which it is applied, and will not be elaborated here. Alternatively, a second friction layer can be further provided only on the basis of any one of the first to fifth embodiments. At this time, the second friction layer is provided on the fourth setting area 14 of the first side surface of the base layer. The second friction layer is disposed opposite to the second combined friction layer, and the second friction layer and the second combined friction layer are in contact and friction with each other to form a friction interface. Other descriptions are the same as those of the friction generator with a foldable structure in the embodiment to which it is applied, and will not be elaborated here. Further, a first friction layer and a second friction layer can be provided on the basis of any one of the first to fifth embodiments. At this time, the first friction layer is provided on the third setting area 13 of the first side surface of the base layer. The first friction layer is disposed opposite to the first combined friction layer, and the first friction layer and the first combined friction layer are in contact and friction with each other to form a friction interface. The second friction layer is provided on the fourth setting area 14 of the first side surface of the base layer. The second friction layer is disposed opposite to the second combined friction layer, and the second friction layer and the second combined friction layer are in contact and friction with each other to form a friction interface. Other descriptions are the same as those of the friction generator with a foldable structure in the embodiment to which it is applied, and will not be elaborated here.

[0093] In the second alternative embodiment, the friction generator with a foldable structure in any one of the first to fifth embodiments further includes: a third friction layer and / or a fourth friction layer; the third friction layer is provided on the first combined friction layer of the first side surface of the base layer. The third friction layer is disposed opposite to the third setting area of the first side surface of the base layer, and the third friction layer and the third setting area of the first side surface of the base layer are in contact and friction with each other to form a friction interface; the fourth friction layer is provided on the second combined friction layer of the first side surface of the base layer. The fourth friction layer is disposed opposite to the fourth setting area of the first side surface of the base layer, and the fourth friction layer and the fourth setting area of the first side surface of the base layer are in contact and friction with each other to form a friction interface.

[0094] It should be understood that for such an alternative embodiment, a third friction layer can be further provided only on the basis of any one of Embodiments 1 to 5. At this time, the third friction layer is provided on the first combined friction layer on the first side surface of the base layer. The third friction layer is disposed opposite to the third setting area on the first side surface of the base layer, and the third friction layer and the third setting area on the first side surface of the base layer are in contact and friction with each other to form a friction interface. Other descriptions are the same as those of the friction generator with a foldable structure in the embodiment to which it is applied, and will not be elaborated here. Alternatively, a fourth friction layer can be further provided only on the basis of any one of Embodiments 1 to 5. At this time, the fourth friction layer is provided on the second combined friction layer on the first side surface of the base layer. The fourth friction layer is disposed opposite to the fourth setting area on the first side surface of the base layer, and the fourth friction layer and the fourth setting area on the first side surface of the base layer are in contact and friction with each other to form a friction interface. Other descriptions are the same as those of the friction generator with a foldable structure in the embodiment to which it is applied, and will not be elaborated here. Further, a third friction layer and a fourth friction layer can be provided on the basis of any one of Embodiments 1 to 5. At this time, the third friction layer is provided on the first combined friction layer on the first side surface of the base layer. The third friction layer is disposed opposite to the third setting area on the first side surface of the base layer, and the third friction layer and the third setting area on the first side surface of the base layer are in contact and friction with each other to form a friction interface. The fourth friction layer is provided on the second combined friction layer on the first side surface of the base layer. The fourth friction layer is disposed opposite to the fourth setting area on the first side surface of the base layer, and the fourth friction layer and the fourth setting area on the first side surface of the base layer are in contact and friction with each other to form a friction interface. Other descriptions are the same as those of the friction generator with a foldable structure in the embodiment to which it is applied, and will not be elaborated here.

[0095] In the third alternative embodiment, the friction generator with a foldable structure in any one of Embodiments 1 to 5 further includes: a first friction layer, a second friction layer, a third friction layer, and a fourth friction layer. The first friction layer is provided on the third setting area 13 on the first side surface of the base layer. The second friction layer is provided on the fourth setting area 14 on the first side surface of the base layer. The third friction layer is provided on the first combined friction layer on the first side surface of the base layer. The fourth friction layer is provided on the second combined friction layer on the first side surface of the base layer. The first friction layer is disposed opposite to the third friction layer, and the fourth friction layer is disposed opposite to the second friction layer. At this time, the first friction layer and the third friction layer are in contact and friction with each other to form a friction interface, and the fourth friction layer and the second friction layer are in contact and friction with each other to form a friction interface. Other descriptions are the same as those of the friction generator with a foldable structure in the embodiment to which it is applied, and will not be elaborated here.

[0096] If the third optional implementation manner is applied to the triboelectric generator with a folding structure in any one of Embodiments 1 to 5, its working principle is as follows: When there is a pressure acting on the triboelectric generator with a folding structure, the first friction layer and the surface of the third friction layer in the triboelectric generator with a folding structure rub against each other to generate static charges. The generation of static charges will change the capacitance between the first electrode layer 2 and the second electrode layer 3, thereby causing a potential difference to appear between the first electrode layer 2 and the second electrode layer 3. When each layer of the triboelectric generator with a folding structure returns to its original state, the internal potential formed between the first electrode layer 2 and the second electrode layer 3 disappears at this time. At this time, a reverse potential difference will be generated again between the first electrode layer 2 and the second electrode layer 3 that have been balanced. By repeatedly rubbing and restoring, a periodic alternating current signal can be formed in the external circuit. The principles of other embodiments and optional implementation manners of the present invention can all be referred to this, and will not be elaborated here.

[0097] In the fourth optional implementation manner, the triboelectric generator with a folding structure in any one of Embodiments 1 to 5 further includes: a third electrode layer and / or a fourth electrode layer; the third electrode layer is correspondingly arranged on the first setting area 21 on the second side surface of the base layer, and the fourth electrode layer is correspondingly arranged on the second setting area 22 on the second side surface of the base layer, and the first electrode layer 2, the second electrode layer 3, the third electrode layer, and the fourth electrode layer do not contact each other. At this time, the first electrode layer 2, the second electrode layer 3, the third electrode layer, and / or the fourth electrode layer serve as the output end of the triboelectric generator with a folding structure in this embodiment. Other descriptions are the same as those of the triboelectric generator with a folding structure in the embodiment to which it is applied, and will not be elaborated here.

[0098] In addition, the fourth optional implementation manner of this embodiment can not only be applied to the triboelectric generator with a folding structure in any one of Embodiments 1 to 5, but also can be applied to the above-mentioned other three optional implementation manners. Those skilled in the art can choose according to actual needs, and no limitation is made here.

[0099] It should be noted that the first electrode layer 2 and the second electrode layer 3 may or may not be in contact with each other, which is not limited herein. When the first electrode layer 2 and the second electrode layer 3 are in contact with each other, the first electrode layer 2 and the second electrode layer 3 are used as a single electrode; when the first electrode layer 2 and the second electrode layer 3 are not in contact with each other, the first electrode layer 2 and the second electrode layer 3 are used as two separate electrodes. Of course, those skilled in the art can also select only one of the first electrode layer 2 and the second electrode layer 3 as a single electrode according to actual needs, which is not limited herein. In addition, in alternative embodiments including a third electrode layer and / or a fourth electrode layer, the usage manners of the first electrode layer, the second electrode layer, the third electrode layer, and the fourth electrode layer are the same as the above-mentioned usage manners, and will not be elaborated herein.

[0100] Optionally, in order to increase the power generation of the triboelectric generator having a foldable structure, in various embodiments and alternative embodiments of the present invention, a raised array structure is provided on at least one of the two surfaces constituting the friction interface. The raised array structure in the present invention adopts the raised array structure in the prior art, and the types and numbers of the depressions and protrusions included in the raised array structure are not limited. Those skilled in the art can flexibly set the types and numbers of the depressions and protrusions included in the raised array structure, which are not limited herein. For example: the raised array structure is composed of a plurality of bumps arranged in a rectangle or a rhombus, or a plurality of strip structures are arranged in a geometric pattern on both sides, four corners, four edges or the entire surface of the at least one surface. Among them, the shape of the bump can be cylindrical, quadrangular prism-shaped or quadrangular pyramid-shaped, etc.; the strip structures can be arranged in an array in the shape of a well, a cross, a zebra crossing, a cross or a square.

[0101] In addition, it should be noted that in various alternative embodiments of the present invention, in order to improve the triboelectric effect, the materials of any two surfaces constituting the friction interface are preferably different types of materials, that is, materials having an electronegativity difference. For example: If the two surfaces of the first friction layer in contact with the first combined friction layer form a friction interface, then the materials of the first friction layer and the first combined friction layer are preferably different types of materials; if the two surfaces of the second friction layer in contact with the second combined friction layer form a friction interface, then the materials of the second friction layer and the second combined friction layer are preferably different types of materials; if the two surfaces of the third setting area of the base layer in contact with the third friction layer form a friction interface, then the materials of the third setting area of the base layer and the third friction layer are preferably different types of materials; if the two surfaces of the fourth friction layer in contact with the fourth setting area of the base layer form a friction interface, then the materials of the fourth friction layer and the fourth setting area of the base layer are preferably different types of materials; if the two surfaces of the first friction layer in contact with the third friction layer form a friction interface, then the materials of the first friction layer and the third friction layer are preferably different types of materials; if the two surfaces of the second friction layer in contact with the fourth friction layer form a friction interface, then the materials of the second friction layer and the fourth combined friction layer are preferably different types of materials. In other cases, the same can be inferred by analogy, and details are not described here.

[0102] In various embodiments and alternative embodiments of the present invention, the base layer is a material with a certain hardness, foldability and elasticity. For example: the base layer can be a flexible insulating material; specifically, the base layer can preferably be any one of polyethylene terephthalate, polyvinyl chloride, polypropylene, and polyethylene.

[0103] In various embodiments and alternative embodiments of the present invention, there are various ways to dispose the first friction layer, the second friction layer, the third friction layer, and / or the fourth friction layer. For example, any one of the methods such as pasting or printing can be used to dispose the first friction layer, the second friction layer, the third friction layer, and / or the fourth friction layer at their corresponding positions.

[0104] In various embodiments and alternative embodiments of the present invention, the first friction layer, the second friction layer, the third friction layer, and / or the fourth friction layer can not only be selected from polymer materials, metals or alloys, indium tin oxide, graphene, silver nanowire films, etc. Those skilled in the art can select any material capable of triboelectric power generation as the first friction layer, the second friction layer, the third friction layer, and / or the fourth friction layer of the present invention for use, and no limitation is made here.

[0105] When the first friction layer, the second friction layer, the third friction layer, and / or the fourth friction layer is selected from polymer materials, the first friction layer, the second friction layer, the third friction layer, and / or the fourth friction layer can be selected from polydimethylsiloxane, polyimide, aniline formaldehyde resin, polyoxymethylene, ethyl cellulose, polyamide, melamine formaldehyde, polyethylene glycol succinate, cellulose, cellulose acetate, polyethylene glycol adipate, diallyl phthalate, cellulose sponge, regenerated sponge, polyurethane elastomer, styrene-propylene copolymer, styrene-butadiene copolymer, rayon, polymethyl methacrylate, polyvinyl alcohol, polyvinyl alcohol, polyester, polyisobutylene, flexible polyurethane sponge, polyethylene terephthalate, polyvinyl butyral, formaldehyde phenol, neoprene, butadiene-propylene copolymer, natural rubber, polyacrylonitrile, acrylonitrile-vinyl chloride, and polyvinyl propylene carbonate.

[0106] When the first friction layer, the second friction layer, the third friction layer, and / or the fourth friction layer is selected from metals or alloys, the first friction layer, the second friction layer, the third friction layer, and / or the fourth friction layer can be selected from gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, tin, iron, manganese, molybdenum, tungsten, or vanadium; the alloy is any one of aluminum alloy, titanium alloy, magnesium alloy, beryllium alloy, copper alloy, zinc alloy, manganese alloy, nickel alloy, lead alloy, tin alloy, cadmium alloy, bismuth alloy, indium alloy, gallium alloy, tungsten alloy, molybdenum alloy, niobium alloy, or tantalum alloy.

[0107] It should be noted that in various embodiments and alternative embodiments of the present invention, the third friction layer can fix the first combined setting area and the second combined setting area into an integral structure. For example, a third friction layer is directly pasted on the aligned first combined setting area and the second combined setting area to fix the first combined setting area and the second combined setting area into an integral structure, and the two cannot move relative to each other directly; the third friction layer can also be arranged in areas on the first combined setting area and the second combined setting area, that is, after the third friction layer is arranged on the first combined setting area and the second combined setting area, the first combined setting area and the second combined setting area can still move relative to each other. Similarly, the fourth friction layer is arranged on the third combined setting area and the fourth combined setting area in the same way, which will not be elaborated here.

[0108] In addition, since the third friction layer on the first combined setting area and the fourth friction layer on the third combined setting area are both located on the first setting area, if the third friction layer and the fourth friction layer are made of the same material, they can be directly pasted or printed as a whole on the first setting area; similarly, since the third friction layer on the second combined setting area and the fourth friction layer on the fourth combined setting area are both located on the second setting area, if the third friction layer and the fourth friction layer are made of the same material, they can be directly pasted or printed as a whole on the second setting area. Those skilled in the art can flexibly select the setting method according to actual needs, and no limitation is made here.

[0109] In various embodiments and optional implementation manners of the present invention, there are multiple ways to set the first electrode layer, the second electrode layer, the third electrode layer, and / or the fourth electrode layer. For example, any one of the methods such as pasting, chemical deposition, plasma deposition, printing, or casting is used to respectively set the first electrode layer and the second electrode layer on the third setting area and the fourth setting area on the second side surface of the base layer.

[0110] In various embodiments and optional implementation manners of the present invention, the first electrode layer, the second electrode layer, the third electrode layer, and / or the fourth electrode layer can be indium tin oxide, graphene, silver nanowire film, metal, or alloy. Among them, the metal is gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, tin, iron, manganese, molybdenum, tungsten, or vanadium; the alloy is any one of aluminum alloy, titanium alloy, magnesium alloy, beryllium alloy, copper alloy, zinc alloy, manganese alloy, nickel alloy, lead alloy, tin alloy, cadmium alloy, bismuth alloy, indium alloy, gallium alloy, tungsten alloy, molybdenum alloy, niobium alloy, or tantalum alloy.

[0111] In order to prevent the first electrode layer, the second electrode layer, the third electrode layer, and / or the fourth electrode layer from contacting each other when used alone, the widths of the first folding line, the second folding line, and the third folding line in various embodiments and optional implementation manners of the present invention can be selected by those skilled in the art, and no limitation is made here. Specifically, Figure 1c the first folding line 101, the second folding line 102, and the third folding line 103 in [specific example] are folding lines with a smaller width, Figure 6a the first folding line 101, the second folding line 102, and the third folding line 103 in [specific example] are folding lines with a thicker width; Figure 2c the first folding line 101, the second folding line 102, and the third folding line 103 in [specific example] are folding lines with a smaller width, Figure 6b the first folding line 101, the second folding line 102, and the third folding line 103 in [specific example] are folding lines with a thicker width. The same applies to other various embodiments and optional implementation manners, and details are not described here again.

[0112] In the present invention, one or a combination of any of the first friction layer, the second friction layer, the third friction layer, the fourth friction layer, the third electrode layer, and the fourth electrode layer can be selected simultaneously. Those skilled in the art can make selections according to needs, and no limitations are imposed herein.

[0113] In addition, the triboelectric generator with a foldable structure of the present invention can not only be used alone, but also multiple ones can be used simultaneously. When there are multiple triboelectric generators with a foldable structure, the multiple triboelectric generators with a foldable structure can be connected and used in series and / or parallel through wires or the like. Of course, multiple triboelectric generators with a foldable structure can also be used alone.

[0114] For the triboelectric generator with a foldable structure provided by the present invention, by folding a base layer with certain hardness, foldability, and elasticity to form the friction foldable structure of the triboelectric generator, it not only greatly reduces the difficulty of assembling the layered triboelectric generator, but also solves the problems of layer misalignment and offset that are prone to occur in the triboelectric generator with a multi-layer structure as the usage time extends, increases the stability of the triboelectric generator, extends the service life of the triboelectric generator. At the same time, the automatic structure rebound effect when no pressure acts on the triboelectric generator is also achieved through this friction foldable structure, ensuring the stability of the triboelectric generator during the contact-separation process.

[0115] Those skilled in the art can understand that although in the above description, for the convenience of understanding, the steps of the method are described in a sequential manner, it should be noted that there is no strict limitation on the order of the above steps.

[0116] Those of ordinary skill in the art can understand that all or part of the steps of implementing the method in the above embodiments can be completed by instructing relevant hardware through a program, and this program can be stored in a computer-readable storage medium, such as: ROM / RAM, magnetic disk, optical disc, etc.

[0117] It can also be understood that the device structure shown in the drawings or embodiments is only schematic, representing a logical structure. Among them, the modules shown as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules.

[0118] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A triboelectric generator with a foldable structure, characterized in that, Comprising: A base layer, a first electrode layer and a second electrode layer; wherein, The base layer has a first folding line, a second folding line and a third folding line; after folding according to the first folding line, the second folding line and the third folding line, a first combined friction layer and a second combined friction layer are formed on the first side surface of the base layer; the first combined friction layer and the first side surface of the base layer opposite thereto are in contact and friction with each other to form a friction interface; the second combined friction layer and the first side surface of the base layer opposite thereto are in contact and friction with each other to form a friction interface; The first electrode layer and the second electrode layer are disposed on the second side surface of the base layer, and the first electrode layer and / or the second electrode layer serve as the output end of the friction generator having a folded structure; The first folding line and the second folding line divide the base layer into four setting areas; the third folding line further divides the first setting area and the second setting area at diagonal positions on the base layer into four combined setting areas; After folding according to the first folding line, the second folding line and the third folding line, the first combined setting area and the second combined setting area on the first side surface of the base layer are pieced together to form the first combined friction layer, the first combined friction layer is disposed opposite to the third setting area on the first side surface of the base layer, the third combined setting area and the fourth combined setting area on the first side surface of the base layer are pieced together to form the second combined friction layer, and the second combined friction layer is disposed opposite to the fourth setting area on the first side surface of the base layer; The third setting area on the first side surface of the base layer and the first combined friction layer and / or the second combined friction layer and the fourth setting area on the first side surface of the base layer are in contact and friction with each other to form a friction interface; The first electrode layer and the second electrode layer are respectively disposed on the third setting area and the fourth setting area of the second side surface of the base layer.

2. The triboelectric generator with a folding structure according to claim 1, wherein Further comprising: A first friction layer and / or a second friction layer; The first friction layer is disposed on the third setting area of the first side surface of the base layer, the first friction layer is disposed opposite to the first combined friction layer, and the first friction layer and the first combined friction layer are in contact and friction with each other to form a friction interface; The second friction layer is disposed on the fourth setting area of the first side surface of the base layer, the second friction layer is disposed opposite to the second combined friction layer, and the second friction layer and the second combined friction layer are in contact and friction with each other to form a friction interface.

3. The triboelectric generator with a foldable structure according to claim 1, characterized in that, Further comprising: A third friction layer and / or a fourth friction layer; The third friction layer is disposed on the first combined friction layer of the first side surface of the base layer, the third friction layer is disposed opposite to the third setting area of the first side surface of the base layer, and the third friction layer and the third setting area of the first side surface of the base layer are in contact and friction with each other to form a friction interface; The fourth friction layer is disposed on the second combined friction layer on the first side surface of the base layer. The fourth friction layer is disposed opposite to the fourth setting area on the first side surface of the base layer, and the fourth friction layer and the fourth setting area on the first side surface of the base layer are in contact and friction with each other to form a friction interface.

4. The triboelectric generator with a foldable structure according to claim 1, wherein, Further comprising: A first friction layer, a second friction layer, a third friction layer, and a fourth friction layer; the first friction layer is disposed on the third setting area on the first side surface of the base layer, the third friction layer is disposed on the first combined friction layer on the first side surface of the base layer, the first friction layer and the third friction layer are disposed opposite to each other, and the first friction layer and the third friction layer are in contact and friction with each other to form a friction interface; the second friction layer is disposed on the fourth setting area on the first side surface of the base layer, the fourth friction layer is disposed on the second combined friction layer on the first side surface of the base layer, the second friction layer and the fourth friction layer are disposed opposite to each other, and the second friction layer and the fourth friction layer are in contact and friction with each other to form a friction interface.

5. The triboelectric generator with a foldable structure according to claim 4, wherein, The materials of the first friction layer and the third friction layer are different, and / or the materials of the second friction layer and the fourth friction layer are different.

6. The triboelectric generator with a foldable structure according to any one of claims 1-5, characterized in that, Further comprising: a third electrode layer and a fourth electrode layer; The third electrode layer and the fourth electrode layer are respectively disposed on the first setting area and the second setting area on the second side surface of the base layer; The first electrode layer, the second electrode layer, the third electrode layer, and / or the fourth electrode layer serve as the output terminals of the friction generator having a foldable structure.

7. The triboelectric generator with a foldable structure according to claim 1, wherein, A convex array structure is provided on at least one of the two surfaces constituting the friction interface.

8. The triboelectric generator with a foldable structure according to claim 1, wherein, The first fold line and the second fold line intersect perpendicularly, the third fold line passes through the intersection point of the first fold line and the second fold line, and the third fold line coincides with the angle bisector of a set of diagonals formed after the third fold line and the first fold line and the second fold line intersect perpendicularly.

9. The triboelectric generator with a foldable structure according to claim 1 or 8, characterized in that, The shapes and sizes of the four setting areas of the base layer are the same, and the shapes and sizes of the four combined setting areas of the base layer are the same; or, The shapes and sizes of the four setting areas of the base layer are the same, and the shapes and sizes of any two combined setting areas at the diagonal positions on the base layer are the same; or, The shapes and sizes of any two setting areas at the diagonal positions on the base layer are the same, and the shapes and sizes of the four combined setting areas of the base layer are the same.

10. The triboelectric generator with a foldable structure according to claim 1, wherein, The first fold line, the second fold line, and the third fold line are folded toward the first side surface direction of the base layer.

11. The triboelectric generator with a foldable structure according to claim 1, wherein, The shape of the base layer is square, rectangular, or circular.

12. The triboelectric generator with a folding structure according to claim 1, wherein, When the shape of the base layer is square, and the first folding line and the second folding line divide the base layer into four square setting areas with the same shape and size, after folding according to the first folding line, the second folding line and the third folding line, the shapes and sizes of the first combined friction layer and the second combined friction layer are the same as those of the third setting area and the fourth setting area of the base layer, and the vertical projection of the triboelectric generator with a folded structure is square; or, When the shape of the base layer is square, and the first folding line and the second folding line divide the base layer into four isosceles right triangle setting areas with the same shape and size, after folding according to the first folding line, the second folding line and the third folding line, the shapes and sizes of the first combined friction layer and the second combined friction layer are the same as those of the third setting area and the fourth setting area of the base layer, and the vertical projection of the triboelectric generator with a folded structure is an isosceles right triangle.

13. The triboelectric generator with a folding structure according to claim 1, characterized in that, The base layer is a flexible insulating material; the base layer is any one of polyethylene terephthalate, polyvinyl chloride, polypropylene, and polyethylene.

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