WO2021146922A1

WO2021146922A1 - Self-power-generation assembly and self-power-generation device

Info

Publication number: WO2021146922A1
Application number: PCT/CN2020/073522
Authority: WO
Inventors: 武文静; 黄驭
Original assignee: 武文静
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2021-07-29
Also published as: CN113439346B; CN113439346A

Abstract

A self-power-generation assembly (10) and a self-power-generation device (20). The self-power-generation assembly (10) comprises: a supporting seat (100) and a button (200) which are oppositely arranged, the button (200) having elasticity, and the surface of the button (200) close to the supporting seat (100) bending towards the supporting seat (100) to form a first curved surface (201); and a piezoelectric plate (300) fixed on the supporting seat (100). When the button (200) is pressed, all parts of the first curved surface (201) can be pressed firmly against the piezoelectric plate (300), and the supporting seat (100) has a deformation space for accommodating the piezoelectric plate (300) deformed by force. When the button (200) is pressed by force, the first curved surface (201) of the button (200) abuts against the piezoelectric plate (300), and the overall deformation amount of the piezoelectric plate (300) is increased, and the deformation direction tends to be the same. In this way, the power generation efficiency of the self-power-generation assembly (10) is greatly improved, and the electricity generated is increased by 30%-50%. The present invention overall has a simple structure, less parts and lower cost.

Description

Self-power generation component and self-power generation device

Technical field

This application relates to the technical field of self-power generation equipment, and in particular to a self-power generation component and a self-power generation device.

Background technique

The statements here only provide background information related to this application, and do not necessarily constitute prior art.

Self-generating components such as piezoelectric sheets are often used in products with self-generating functions. The piezoelectric ceramic sheets in the piezoelectric sheets will deform under the action of force such as pressing, external vibration or impact, and produce on both sides after deformation. Charges with different polarities can output the amount of charge, which in turn can realize the output of electric energy. Piezoelectric ceramic sheets are widely used. Common applications include self-powered buttons, self-powered switches, and vibration generators.

The self-generating element generally includes a button, a piezoelectric sheet, and a fixing seat. The button is provided with a pot plate on the side close to the piezoelectric sheet. After the button is pressed, the piezoelectric sheet is deformed by force. However, the self-generating element with this structure, the piezoelectric The direction of deformation is irregular everywhere in the sheet, the effective deformation of the piezoelectric sheet is small, the power generation efficiency is low, and the power generation is also low. In order to improve the power generation and power generation efficiency of the corresponding self-power generation device, the commonly used method is to increase the amount of deformation to cause greater deformation of the piezoelectric sheet, but the service life of the piezoelectric ceramic sheet and the metal sheet will be greatly reduced, and it is easy to cause metal fatigue However, the damage is invalid, the long-term use cost is high, and it is difficult to meet the needs of practical applications.

technical problem

One of the objectives of the embodiments of the present application is to provide a self-powered component, which aims to solve the problem of low power generation efficiency of the self-powered component.

Technical solutions

In order to solve the above technical problems, the technical solutions adopted in the embodiments of this application are:

A self-generating component, including:

The support base and the key are arranged oppositely, the key has elasticity, and the side of the key close to the support base is bent in the direction of the support base to form a first curved surface;

Piezoelectric sheet, fixed on the support base;

Wherein, when the button is pressed, the first curved surface can be in close contact with the piezoelectric sheet, and the support seat is formed with a deformation space for accommodating the piezoelectric sheet after being deformed by a force.

In one embodiment, the side of the support seat close to the button is bent in a direction away from the button to form a second curved surface, and the curvature of the second curved surface is greater than that of the first curved surface when the button is not pressed. The curvature of the curved surface, the curvature of the second curved surface is approximately equal to the curvature of the first curved surface after the button is pressed, and the second curved surface can be closely attached to the piezoelectric sheet.

In one embodiment, a side of the support seat facing the key is recessed and formed with a groove, the groove forms the deformation space, and the inner bottom surface of the groove forms the second curved surface.

In one embodiment, the piezoelectric sheet is circular, and the piezoelectric sheet is arranged coaxially with the groove.

In one embodiment, the key includes a substrate and a boss protruding on one side of the substrate, the cross section of the boss is circular, and the first curved surface is formed on the boss away from the substrate. At one end, the cross section of the groove is circular, and the diameter of the boss is smaller than the diameter of the groove.

In one embodiment, the ratio of the diameter of the boss to the diameter of the groove is set to be one-third to four-fifths.

In an embodiment, the ratio of the diameter of the boss to the diameter of the groove is set to be two-thirds to three-quarters.

In an embodiment, the base plate is recessed on the circumferential side of the boss to form an annular groove, and the annular groove is curved toward the direction of the support seat.

In one embodiment, the piezoelectric sheet includes a metal sheet and a piezoelectric material layer arranged coaxially, the piezoelectric material layer is attached to one side of the metal sheet, and the periphery of the metal sheet is fixed to the Support the seat.

In an embodiment, the cross-sections of the metal sheet and the piezoelectric material layer are both circular, the metal sheet is provided with a plurality of grooves along the radial direction, and the plurality of grooves are formed by the shape of the metal sheet. The center point is the center of the circle and is evenly arranged in a radial shape, a plurality of the grooves divide the metal sheet into a plurality of metal strips, and the peripheries of two adjacent metal strips are connected.

In one embodiment, the cross section of the groove body is fan-shaped, and the width of the groove body gradually increases from the center position of the metal sheet toward the outside.

In one embodiment, the angle of the central angle between the two straight edges of the groove body is smaller than the angle of the central angle between the two straight edges of the metal strip.

Another object of the present application is to provide a self-powered device, including the above-mentioned self-powered component.

In one embodiment, the self-power generation device further includes a housing, the support base and the piezoelectric sheet are arranged in the housing, and the button is arranged on the housing.

In one embodiment, the self-generating device further includes an elastic member, which is arranged between the key and the housing to provide a restoring force to the key after being pressed.

Beneficial effect

In the self-generating component provided by the embodiment of the present application, the side of the button facing the support base is formed with a first curved surface. The button has elasticity and will deform after being pressed. When the button is pressed by force, the first curved surface of the button can interact with pressure. The electric sheet is tightly attached, the overall deformation of the piezoelectric sheet increases, and the direction of the deformation also tends to be the same. The power generation efficiency and power generation of the self-powered components have been greatly improved, which can increase the power generation by 30%-50%; overall; The structure is simple, the overall parts are few, and the cost is low.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following description are only of the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

Figure 1 is a cross-sectional view of a self-powered component provided by an embodiment of the application;

Fig. 2 is an exploded schematic diagram of the self-generating component shown in Fig. 1;

Figure 3 is an exploded schematic diagram of a self-powered component provided by another embodiment of the application;

Fig. 4 is an exploded schematic diagram of the self-powered assembly shown in Fig. 3 from another angle;

FIG. 5 is a schematic structural diagram of a piezoelectric sheet in a self-powered component provided by an embodiment of the application; FIG.

6 is a schematic diagram of the structure of the metal sheet in the piezoelectric sheet shown in FIG. 5;

FIG. 7 is a schematic diagram of a three-dimensional structure of a self-generating device provided by an embodiment of the application;

Fig. 8 is an exploded schematic diagram of the self-generating device shown in Fig. 7.

Among them, the reference signs in the figure:

10-Self-powered components; 20-Self-powered devices; 100-support base; 200-button; 300-piezoelectric sheet; 400-shell; 500-open key; 110-groove; 101-second curved surface; 210- Substrate; 220-protrusion; 201-first curved surface; 230-annular groove; 301-groove body; 310-metal sheet; 320-piezoelectric material layer; 311-metal strip; 312-pad; 410-circuit board.

Embodiments of the present invention

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present application, but should not be understood as a limitation to the present application.

In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, not It indicates or implies that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "multiple" means two or more than two, unless otherwise specifically defined.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

In order to illustrate the technical solutions described in this application, detailed descriptions are given below in conjunction with specific drawings and embodiments.

As shown in FIGS. 1 to 2, the self-generating component 10 provided by the embodiment of the present application includes a support base 100, a button 200 and a piezoelectric sheet 300. The support base 100 can be made of non-conductive materials, such as silica gel, plastic, wood, ceramic or glass, etc. The support base 100 is used to fix and support the piezoelectric sheet 300. The support base 100 and the button 200 are arranged opposite to each other, and there may be a space between the two. The button 200 is flexible. The button 200 can be made of plastic, silicone, etc. The side of the button 200 close to the support base 100 is bent toward the support base 100 to form a first curved surface 201. The radius and curvature of the first curved surface 201 can be determined by the piezoelectric sheet. The material of 300 is set so that the piezoelectric sheet 300 can form an effective deformation, and can ensure that the deformation is within a reasonable range, and avoid the service life being too short due to the excessive deformation. The piezoelectric sheet 300 is fixed on the support base 100, and the support base 100 forms a deformation space for accommodating the piezoelectric sheet 300 deformed by a force. The cross-sectional profile of the deformation space may be rectangular or circular. When the button 200 is pressed, the first curved surface 201 can be in close contact with the piezoelectric sheet 300. The arrangement of the first curved surface 201 makes the deformation of the piezoelectric sheet 300 more uniform, and the deformation of the piezoelectric sheet 300 is more uniform. The direction area is the same, and the overall effective deformation has been greatly improved, that is, the power generation has been greatly improved.

In the self-generating component 10 provided by this embodiment, the button 200 has a first curved surface 201 on the side facing the support base 100. The button 200 is elastic and deforms after being pressed. When the button 200 is pressed by force, the first curved surface of the button 200 Every part of 201 can be in close contact with the piezoelectric sheet 300, the overall deformation of the piezoelectric sheet 300 increases, and the deformation direction also tends to be the same. The power generation efficiency and power generation capacity of the self-power generation component 10 are greatly improved, which can be improved 30%-50% of power generation; simple overall structure, few overall components and low cost.

In one embodiment, the side of the support base 100 that is close to the button is bent in a direction away from the button 200 to form a second curved surface 101. The curvature of the second curved surface 101 is greater than that of the first curved surface 201 when the button 200 is not pressed. The curvature of the curved surface 101 is approximately equal to the curvature of the first curved surface 201 after the button 200 is pressed, so that the piezoelectric sheet 300 can be close to the second curved surface 101, and the deformation of the piezoelectric sheet 300 is more uniform. The deformation direction of the sheet 30 is the same everywhere. That is to say, the two opposite surfaces of the support base 100 and the button 200 are both curved, and the two curved surfaces have the same bending direction. The force application surface and the support surface after the deformation of the piezoelectric sheet 300 are both curved. After being deformed, it is compressed between the first curved surface 201 and the second curved surface 101.

In one embodiment, a groove 110 is recessed on the side of the support base 100 facing the key 200, the second curved surface 101 is formed on the inner bottom surface of the groove 110, and the second curved surface 101 is curved in a direction away from the key 200.

In an embodiment, the piezoelectric sheet 300 is circular as a whole, and the cross section of the groove 110 may be circular or rectangular. When the cross section of the groove 110 is circular, the piezoelectric sheet 300 is arranged coaxially with the groove 110. At this time, the second curved surface 101 of the groove 110 and the first curved surface 201 of the button 200 are both spherical surfaces. The size of the piezoelectric sheet 300 and the groove 110 can be set according to actual product and application requirements, and the outer diameter of the piezoelectric sheet 300 is larger than the maximum diameter of the groove 110.

In one embodiment, the periphery of the piezoelectric sheet 300 is adhesively fixed on the support base 100. The periphery of the piezoelectric sheet 300 can be fixed on the support base 100 by industrial glue or adhesive tape, or the piezoelectric sheet 300 can be fixed on the support base 100 by other forms; the support base 100 can be recessed to form a width-adapted piezoelectric sheet 300 peripheral ring support platform, the ring support platform is perpendicular to the axis of the support base 100, one end of the ring support platform is connected to the second curved surface 101 to provide support for the piezoelectric sheet 300, at this time the groove on the support base 100 includes communication的环槽体和槽110。 The ring groove body and groove 110.

In an embodiment, as shown in FIGS. 2 and 4, the button 200 includes a substrate 210 and a boss 220 protruding on one side of the substrate 210. The substrate 210 and the boss 220 may be integrally formed. The cross section of the boss 220 In a circular shape, the second curved surface 101 is formed at an end of the boss 220 away from the substrate 210, and the diameter of the boss 220 is smaller than the diameter of the groove 110. The boss 220 may be arranged at the center of one side of the substrate 210.

In one embodiment, as shown in FIG. 4, the substrate 210 is recessed on the circumferential side of the boss 220 to form an annular groove 230, and the annular groove 230 is curved toward the direction of the support base 100. The arrangement of the annular groove 230 makes the thickness of the substrate 210 near the circumference of the boss 220 thinner, which facilitates the deformation of the button 200 after being stressed, improves the elasticity, and makes the pressing operation of the button 200 easier; the width and depth of the annular groove 230 can be adjusted according to The actual size of the product is set.

In one embodiment, the ratio of the diameter of the boss 220 to the diameter of the groove 110 is set to be one-third to four-fifths. By setting the two diameters within a reasonable range, the piezoelectric sheet 300 has a larger amount of deformation after being deformed under a force, and it can avoid damaging the piezoelectric sheet 300 after multiple uses.

In a specific embodiment, the ratio of the diameter of the boss 220 to the diameter of the groove 110 is set to be two-thirds to three-quarters.

In one embodiment, as shown in FIG. 5 and FIG. 6, the piezoelectric sheet 300 includes a piezoelectric material layer 320 and a metal sheet 310 arranged coaxially. The piezoelectric material layer 320 is deformed due to the piezoelectric effect. It can output electric charges, the piezoelectric material layer 320 is attached to one side of the metal sheet 310, and the periphery of the metal sheet 310 is fixed on the support base 100.

In an embodiment, the cross-sections of the metal sheet 310 and the piezoelectric material layer 320 are both circular, that is, the piezoelectric material layer 320 and the metal sheet 310 are both circular sheets. The metal sheet 310 is provided with a plurality of groove bodies 301 along the radial direction, and the plurality of groove bodies 301 are uniformly arranged in a radial shape with the center point of the metal sheet 310 as the center; the plurality of groove bodies 301 divide the metal sheet 310 into a plurality of metal strips 311 , The peripheries of two adjacent metal strips 311 are connected, that is, the two radial ends of the groove body 301 are closed. The metal sheet 310 is attached to one side of the piezoelectric material layer 320, such as being attached to the piezoelectric material layer 320 by means of adhesion. In the self-powered component 10 in this embodiment, by slotting on the metal sheet 310, when the self-powered component 10 is pressed, the deformation of the piezoelectric sheet 300 can be controlled well, and the generated deformation is relatively regular, and the deformation is everywhere. The direction and the amount of deformation can tend to be the same, which weakens or eliminates the situation that the positive and negative charges generated on both sides of the piezoelectric sheet 300 are neutralized and canceled when the piezoelectric sheet 300 is pressed. Therefore, the power generation efficiency can be effectively improved, and the more regular deformation can produce more More electric charge, so the power generation has a significant increase, which can increase the power generation by 60% to 1 times.

Table 1 shows three products that use self-generating components with different structures. Among them, the support seats of the three products are formed with a deformation space for accommodating the deformed piezoelectric sheet. The materials of the piezoelectric sheet are copper sheets and piezoelectric ceramic sheets. . The bottom surface of the button of product 1 is provided with a piezo sheet to press the piezoelectric sheet; the side of the button of product 2 facing the support base is formed with a spherical surface, and all parts of the spherical surface can contact the piezoelectric sheet after the button is pressed; The button has the same structure as the button of product 2. The copper sheet in the piezoelectric sheet of product 3 is provided with a structure of multiple slots in the above embodiment, and the copper sheet is provided with 6 sector-shaped slots.

Table 1

It can be seen from the above table that the power output of product 2 and product 3 with spherical surface is greatly improved compared to product 1 with Guozi plate, and the button of product 3 adopts spherical surface structure with copper slotting. The design can increase the power generation by more than one time, and the utility is strong.

The shape and size of each trough body 301 can be set to be the same, and the angles of the central angles between the straight edges on both sides of each metal strip 311 are the same. During specific processing, a circular metal sheet 310 is used as a raw material, and multiple fan-shaped blocks of the same size are cut from the circular metal sheet 310, and the remaining part is the finished metal sheet 310.

The number and layout density of the tank 301 can be set according to the actual application environment. The number of the metal strips 311 can be 3 or more. The specific number of the tank 301 can be 3-10, such as 4, 6 One, eight, ten, etc. As shown in Fig. 6, the number of tank bodies 301 is set to six.

In one embodiment, the cross section of the groove body 301 is fan-shaped. As shown in FIG. 6, the width of the groove body 301 gradually increases from the center position of the metal sheet 310 toward the outside. It is understandable that each trough body 301 may also have a contour similar to a sector.

In one embodiment, as shown in FIG. 6, the groove body 301 divides the metal sheet 310 into a plurality of metal strips 311, and the outer peripheral edges of two adjacent metal strips 311 are connected. The angle of the central angle between the two straight sides of the groove body 301 It is set to be an angle smaller than the central angle between the two straight edges of the metal strip 311. That is, the angle of the central angle between the two adjacent straight edges of two adjacent metal bars 311 is smaller than the angle of the central angle between the two straight edges of the metal bar 311.

In an embodiment, the piezoelectric material layer 320 in the piezoelectric sheet 300 may be, but is not limited to, a piezoelectric ceramic sheet, and may also be other materials that can deform after being stressed and convert the kinetic energy generated by the deformation into electrical energy.

In one embodiment, the metal sheet 310 has elasticity. The metal sheet 310 can be, but not limited to, copper, stainless steel, or tinplate. It can also be other materials that can support deformation, have anti-fatigue characteristics, and can rely on itself after the force is removed. The elastic restoring force restores other metal materials deformed.

The self-power generation device 20 provided by the embodiment of the present application includes the self-power generation component 10 of the above-mentioned embodiment. Since the piezoelectric sheet 300 can closely adhere to the inner bottom wall of the groove 110 after the button 200 is pressed, the overall deformation of the piezoelectric sheet 300 increases, and the deformation direction also tends to be the same. The power generation efficiency and power generation of the self-power generation component 10 are obtained. A relatively large increase can increase the power generation output by 30%-50%; and the self-power generation device 20 has a simple overall structure, does not require the use of pans, has fewer overall components, and has a lower cost.

In one embodiment, as shown in Figures 7 and 8, the self-power generation device 20 further includes a housing 400, the housing 400 encloses an inner cavity, the support base 100 and the piezoelectric sheet 300 are both arranged in the inner cavity, and the button 200 is arranged on the housing 400, and the button 200 can be automatically reset after being pressed. The button 200 can be assembled on the housing 400 by a snap-fit structure or a snap-fit structure.

The surface of the metal sheet 310 near the outer edge may be provided with a bonding pad 312 for wiring to draw current. Due to the slotting of the metal sheet 310, it has more effective deformation area. At the same time, by providing the structure of the slot body 301, the self-powered assembly 10 can be transformed into a controllable deformation of a controllable area, thereby effectively improving the power generation efficiency The slotting of the metal sheet 310 is matched with the supporting seat 100 and the arc surface of the button 200, so that the self-generating device 20 can increase the power generation by more than one time.

In one embodiment, as shown in FIG. 8, the self-power generation device 20 is a flat switch. The self-power generation device 20 further includes a circuit board 410 arranged in the housing 400, and a switch key 500 is provided at the center of the button 200. The switch key 500 has a circular shape, and the bottom surface of the switch key 500 is provided with a pot piece, which is housed in the button 200. The arrangement of the pot piece makes the button 200 feel more handy when the button 200 is pressed. The circuit board 410 is connected to the pad 312 on the metal strip 311 through a connecting wire. An energy storage module may be provided on the circuit board 410 to store the electric energy converted from kinetic energy after the piezoelectric sheet 300 is deformed.

In one embodiment, the self-generating device further includes an elastic member, which is disposed between the button 200 and the housing 400 to provide a restoring force to the button after being pressed. The elastic member can be, but not limited to, springs, plastics, pancakes, or other materials or components that can automatically recover after being deformed by force. The elastic member makes the button pop up after pressing the button 200 under the standard pressing force, so that Press 200 to reset.

The above are only optional embodiments of the present application, and are not used to limit the present application. For those skilled in the art, this application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the scope of the claims of this application.

Claims

A self-generating component, including:

The support base and the key are arranged oppositely, the key has elasticity, and the side of the key close to the support base is bent in the direction of the support base to form a first curved surface;

Piezoelectric sheet, fixed on the support base;

Wherein, when the button is pressed, the first curved surface can be in close contact with the piezoelectric sheet, and the support seat is formed with a deformation space for accommodating the piezoelectric sheet after being deformed by a force.
The self-powered assembly according to claim 1, wherein the side of the support base close to the button is bent in a direction away from the button to form a second curved surface, and the curvature of the second curved surface is greater than that of the button. When not pressed, the curvature of the second curved surface is greater than the curvature of the first curved surface. After the button is pressed, the curvature of the second curved surface is approximately equal to the curvature of the first curved surface. The piezoelectric sheet is close to each other.
The self-powered assembly according to claim 2, wherein a groove is formed on the side of the support seat facing the button, the groove forms the deformation space, and the inner bottom surface of the groove forms the The second curved surface.
3. The self-powered component according to claim 3, wherein the piezoelectric sheet is circular, and the piezoelectric sheet is arranged coaxially with the groove.
The self-powered component of claim 3, wherein the button includes a substrate and a boss protruding from one side of the substrate, the cross section of the boss is circular, and the first curved surface is formed on the An end of the boss far away from the substrate, the cross section of the groove is circular, and the diameter of the boss is smaller than the diameter of the groove.
The self-generating component of claim 5, wherein the ratio of the diameter of the boss to the diameter of the groove is set to be one-third to four-fifths.
7. The self-generating component of claim 6, wherein the ratio of the diameter of the boss to the diameter of the groove is set to be two-thirds to three-quarters.
5. The self-powered assembly according to claim 5, wherein the base plate is recessed on the circumferential side of the boss to form an annular groove, and the annular groove is curved toward the direction of the support base.
The self-powered component of claim 1, wherein the piezoelectric sheet comprises a metal sheet and a piezoelectric material layer arranged coaxially, and the piezoelectric material layer is attached to one side of the metal sheet, so The periphery of the metal sheet is fixed on the support seat.
The self-generating component according to claim 9, wherein the cross-sections of the metal sheet and the piezoelectric material layer are both circular, and the metal sheet is provided with a plurality of grooves along the radial direction, and a plurality of The groove bodies are uniformly arranged in a radial shape with the center point of the metal sheet as the center, and the plurality of groove bodies divide the metal sheet into a plurality of metal strips, and the peripheries of two adjacent metal strips are connected.
10. The self-powered assembly according to claim 10, wherein the cross section of the trough body is fan-shaped, and the width of the trough body gradually increases from the center position of the metal sheet toward the outside.
11. The self-generating component of claim 11, wherein the angle of the central angle between the two straight edges of the groove body is smaller than the angle of the central angle between the two straight edges of the metal strip.
A self-power generation device, characterized in that it comprises the self-power generation component of claim 1.
The self-power generation device of claim 13, wherein the self-power generation device further comprises a housing, the support base and the piezoelectric sheet are arranged in the housing, and the button is arranged in the housing. Physically.
The self-powered device of claim 14, wherein the self-powered device further comprises an elastic member, the elastic member is provided between the button and the housing to provide for the button after being pressed. Resilience.