Low-frequency automatic power supply wireless mouse system

Abstract

The invention relates to the technical field of mouse self power generation, in particular to a low-frequency automatic power supply wireless mouse system. The wireless mouse comprises a wireless mouse body, a self-power-generation module installed in the wireless mouse body and an energy control module for charging electric energy generated by the self-power-generation module into a wireless mouse battery. The self-power-generation module comprises a flexoelectric structure and a piezoelectric structure which are clamped between keys and a mouse base. The flexoelectric structure and the piezoelectric structure can deform at the same time under the pressing action of the key so as to generate electric energy through the flexoelectric effect and the piezoelectric effect respectively. By integrating the self-power-generating module, the wireless mouse system can generate electric energy by using the key pressing action of the mouse in daily use, so that the built-in battery is automatically charged. By means of the mouse, the endurance time of the mouse is greatly prolonged, the trouble of frequently replacing a battery or charging the battery is reduced, the use convenience and the satisfaction degree of a user are improved, and meanwhile the concepts of environmental protection and sustainable utilization of energy are reflected.

Description

Technical Field

[0001] The invention relates to the technical field of mouse self-generation, in particular to a low-frequency automatic power supply wireless mouse system. Background Art

[0002] With the development of technology, wired mice with limited usage scenarios are gradually replaced by wireless mice. The emergence of wireless mice mainly solves the limitations of cable length and cable travel path, and improves the usage distance and convenience.

[0003] During the use of the existing wireless mouse, it mainly relies on the internal battery for continuous discharge. However, after a period of use, the battery will be low on power and needs to be replaced or charged in time, which makes it impossible to achieve the purpose of ultra-long battery life. Therefore, a solution is urgently needed. Summary of the invention

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a low-frequency automatic power supply wireless mouse system. The present invention can power the battery in the wireless mouse by adopting a self-generating module to achieve the purpose of ultra-long battery life.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A low-frequency automatic power supply wireless mouse system comprises a wireless mouse, a self-generating module installed inside the wireless mouse, and an energy control module for charging the electric energy generated by the self-generating module into a battery of the wireless mouse. The self-generating module comprises a flexoelectric structure and a piezoelectric structure sandwiched between a button and a mouse base; the flexoelectric structure and the piezoelectric structure can be deformed simultaneously under the action of pressing a button to generate electric energy through the flexoelectric effect and the piezoelectric effect respectively.

[0007] As a further solution of the present invention: the flexoelectric structure includes a substrate fixedly connected to the inner side of the key, and a plurality of cones arranged in an array are fixedly installed on the lower surface of the substrate, the cones are made of flexoelectric material, and each cone can produce the flexoelectric effect when the key is pressed; the bottom end of each cone abuts against the pressing end of the piezoelectric structure to transmit the pressing action of the key to the piezoelectric structure.

[0008] As a further solution of the present invention: each cone is inverted and vertically fixedly mounted on the lower surface of the base plate.

[0009] As a further solution of the present invention: multiple groups of weight reduction holes are opened on the conical surface of each cone, each group of weight reduction holes is evenly distributed around the circumference of the cone, and each weight reduction hole in the same group is evenly arranged in sequence along the direction of the busbar where the group is located.

[0010] As a further solution of the present invention: the base plate is fixedly mounted on the key by a connecting rod fixed on its upper surface.

[0011] As a further solution of the present invention: the piezoelectric structure is crimped under the flexural electric structure, and the piezoelectric structure includes a sensing plate made of piezoelectric material; the sensing plate includes a sensing layer and a supporting layer arranged in sequence from top to bottom, the sensing layer constitutes a pressing end of the piezoelectric structure, and the supporting layer is supported and installed on the mouse base; a flexible layer is sandwiched between the sensing layer and the supporting layer in electrical contact, and the hardness of the flexible layer is less than that of the sensing layer and the supporting layer.

[0012] As a further solution of the present invention: the support layer is fixedly mounted on the mouse base via a conductive column fixed at the bottom thereof.

[0013] As a further solution of the present invention: the cone is made of a polyurethane-graphene composite material, the substrate is made of an aluminum-based carbon fiber composite material, and the substrate is connected to the energy control module through a wire.

[0014] As a further solution of the present invention: the electric energy generated in the piezoelectric structure is transmitted to the energy control module by the conductive column through the wire.

[0015] As a further solution of the present invention: the total amount of electric energy generated by the self-generating module is Q t , the calculation formula is as follows:

[0016] Q t =nn 0 Q+nn 0 F t (d e +d′ e );

[0017] Where n represents the number of times the button is pressed; 0 represents the number of cones; Q represents the power generation when a single cone is pressed once; F t Represents the total force on a single cone during a single press; d e Indicates the piezoelectric coefficient of the sensing plate; d′ e It represents the equivalent piezoelectric coefficient of the sensing plate;

[0018]

[0019] In the formula, It represents the distribution of electric polarization intensity on the upper surface of an inverted cone; represents the distribution of electric polarization intensity on the lower surface of an inverted cone; r 1 Represents the radius of the upper surface of the inverted cone; r 2 represents the radius of the lower surface of the inverted cone; ρ represents the distance from the current point on the surface to the center point of the surface; It represents the angle between the line connecting the point on the current surface and the center point of the surface and the set direction; dS represents the area differential;

[0020]

[0021] Where, f represents the frequency of the alternating load in the sensing plate; E′ represents the equivalent elastic modulus of the sensing plate; S e Indicates the piezoelectric area of ​​the sensing plate; It represents the first-order derivative of the current I in the sensing plate with respect to the strain ε, that is, the slope of the relationship curve i(ε).

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. By integrating a self-generating module, the wireless mouse system can generate electricity by pressing buttons in daily use of the mouse, thereby automatically charging the built-in battery. This greatly extends the battery life of the mouse, reduces the trouble of frequent battery replacement or charging, improves user convenience and satisfaction, and also embodies the concept of environmental protection and sustainable use of energy.

[0024] 2. The array-arranged cone design not only effectively converts key presses into electrical energy, but also achieves efficient energy transfer through direct contact between the cone and the piezoelectric structure. This structural design not only ensures the high efficiency of electrical energy generation, but also ensures the normal feedback of key operations, improving the user experience.

[0025] 3. By installing the cone upside down and vertically, the stress state of the flexural electrical structure is further optimized, so that when the key is pressed, the cone can deform more evenly, thereby improving the efficiency of power conversion.

[0026] 4. The weight-reducing holes on the cone reduce the weight of the overall structure, which helps reduce the fatigue of the mouse during use. At the same time, the existence of the weight-reducing holes also increases the flexibility of the cone deformation, further improving the efficiency of power generation. In addition, the uniform distribution of the weight-reducing holes also ensures the stability when pressing the button.

[0027] 5. The substrate is fixedly mounted on the button through a connecting rod, which ensures a stable connection between the flexure electrical structure and the button and improves the reliability and durability of the structure.

[0028] 6. Through the electrical contact and lamination of the sensing layer and the supporting layer, as well as the clamping of the flexible layer, the efficient conversion of the piezoelectric effect is achieved. At the same time, this structure also ensures the stability and reliability of the piezoelectric structure when subjected to force, and improves the stability and continuity of the electrical energy output.

[0029] 7. The supporting layer is fixedly installed on the mouse base through the conductive column, which not only realizes the stable connection between the piezoelectric structure and the mouse base, but also directly transmits electric energy through the conductive column, thereby reducing the loss during the electric energy transmission process and improving the energy utilization efficiency.

[0030] 8. Polyurethane-graphene composite materials have good flexoelectric and mechanical properties, while aluminum-based carbon fiber composite materials provide excellent strength and lightweight properties. The selection of these materials not only improves the performance of the self-generating module, but also reduces the overall weight and improves the portability of the mouse.

[0031] 9. The electric energy generated in the piezoelectric structure is transmitted to the energy control module through conductive columns and wires. This design ensures the reliability and efficiency of electric energy transmission, and also facilitates the management and distribution of electric energy.

[0032] 10. The calculation formula for the total amount of electricity generated by the self-generating module helps to accurately evaluate the power generation capacity and endurance performance of the system, and provides a scientific basis for product optimization design and performance evaluation. At the same time, the various parameters in the formula also reflect the key factors affecting the generation of electricity, providing guidance for subsequent improvements and optimizations. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The figure is a schematic diagram of the internal structure of the wireless mouse of the present invention.

[0034] Figure 2 It is a structural schematic diagram of the self-generating module of the present invention.

[0035] Figure 3 It is a schematic diagram of the coordination structure of each module in the present invention.

[0036] Figure 4 This is a circuit diagram of the charging part in the energy control module of the present invention.

[0037] In the figure: 1. wireless mouse; 11. button; 12. mouse base; 13. connecting rod; 2. self-generating module; 21. flexural electric structure; 211. substrate; 212. cone; 2121. weight-reducing hole; 22. piezoelectric structure; 221. sensing plate; 2211. sensing layer; 2212. flexible layer; 2213. supporting layer; 222. conductive column; 3. energy control module; 4. mouse operation module; 5. energy storage module; 51. battery. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1 to Figure 4 The self-generating module 2 includes a flexoelectric structure 21 and a piezoelectric structure 22. When deformed by force, mechanical energy is converted into electrical energy through the flexoelectric principle and the piezoelectric principle. The two buttons 11 of the mouse are respectively connected to two substrates 211 through a connecting rod 13. The lower side of the substrate 211 has a cone 212 arranged in a 4×4 array. The cone 212 is provided with a plurality of weight-reducing holes 2121 to form a porous structure. The bottom circuit board of the mouse, i.e., the mouse base 12, is provided with a sensing plate 221 consisting of a sensing layer 2211, a flexible layer 2212 and a supporting layer 2213. The sensing plate 221 is a three-layer rigid-flexible-rigid structure.

[0040] When the button 11 is pressed, the substrate 211 is pressed downward, so that the cone 212 contacts the sensing plate 221. Both are deformed under the pressure and a strain gradient is formed, triggering the flexoelectric effect and the piezoelectric effect, thereby generating an electric field.

[0041] like Figure 2 As shown, the self-generating module 2 uses 2×16 cones 212, and every 16 cones 212 form a 4×4 array. The substrate 211 in the self-generating module 2 is connected to the connecting rod 13, and the material is an aluminum-based carbon fiber composite material, which has high strength and rigidity, strong fatigue resistance, high oxidation resistance and conductivity, and has a size of 10mm×8mm×1mm, and is used to connect the wires with the energy control module 3 to transmit current.

[0042] The conical body 212 is a graphene-polyurethane composite material with a porous structure. The outer frame size is a top circle radius of 0.3mm, a bottom circle radius of 0.6mm, and a height of 1.5mm. The structure can be referred to Figure 2 , has obvious flexoelectric effect, high toughness, strong wear resistance and fatigue resistance, light weight, and a large strain gradient when deformed under pressure, triggering the flexoelectric effect and generating an electric field.

[0043] The composite sensing plate 221 of the three-layer structure of the sensing layer 2211-flexible layer 2212-support layer 2213 is a rigid-flexible-rigid three-layer structure. The material of the sensing layer 2211 is the common piezoelectric semiconductor material polyvinylidene fluoride PVDF, which is compounded with graphene, and the size is 10mm×8mm×0.5mm, so that the material has strong toughness and fatigue resistance, while enhancing its wear resistance and conductivity. It can not only trigger the piezoelectric effect to generate an electric field when under pressure, but also trigger the flexoelectric effect when a strain gradient is generated to generate an electric field. The flexible layer 2212 uses thermoplastic polyurethane TPU in the thermoplastic elastomer TPE, and is compounded with carbon nanotubes of an appropriate concentration, and the size is 10mm×8mm×1.5mm, so that it has good flexibility, wear resistance and fatigue resistance, and has good conductivity. At the same time, the thermoelastic polyurethane itself has a certain viscosity and can be bonded to the upper and lower layers through conductive glue. The material of the support layer 2213 is aluminum bronze with a size of 10mm×8mm×0.5mm. It has high strength and rigidity, strong fatigue resistance, good oxidation resistance and conductivity. The lower part is fixedly connected to the conductive column 222 to provide support for the sensing plate 221. At the same time, it is connected to the energy control module 3 through the conductive column 222 and the wire to transmit current.

[0044] like Figure 3 The energy control module 3 shown is located in the central position and is connected to the self-generating module 2, the mouse operating module 4 and the energy storage module 5. It is used to rectify, filter and stabilize the electric energy generated by the self-generating module 2, and convert it into a form that can directly charge the battery 51, and charge the battery 51 in the energy storage module 5. The charging circuit part can refer to Figure 4 At the same time, the energy output of the two miniature lithium-ion batteries 51 in the energy storage module 5 is regulated, and the mouse control module 4 is powered.

[0045] The energy storage module 5 includes two miniature lithium-ion batteries 51, which are respectively connected to the energy control module 3 and are used to store and output the converted electrical energy.

[0046] The mouse control module is connected to the energy control module 3 and is a common structure of a common wireless mouse 1, including a control chip, a sensor, a Bluetooth module, etc., which is used to collect user input signals and convert, process and output the signals.

[0047] In the embodiment of the present invention, a self-generating module 2 is provided, and the pressure when the finger clicks the left and right buttons 11 is used to drive the substrate 211 to press down through the connecting rod 13, so that the cone 212 contacts the sensing plate 221. At this time, due to the unique performance of the polyurethane-graphene composite material under the porous structure, coupled with the conical shape, the transmitted pressure will cause it to produce a large strain gradient. Under such a large strain gradient, the flexoelectric effect of the conical material will be very obvious, thereby generating a large electric field. At the same time, the sensing layer 2211 at the bottom will also be affected by the pressure. At this time, due to the presence of the flexible layer 2212, the strain gradient of the sensing layer 2211 becomes larger, generating a superimposed electric field of piezoelectricity and flexoelectricity. The electric fields of the cone 212 and the sensing plate 221 act simultaneously, thereby realizing the self-generating of the system, and transmitting it to the energy control module 3 through the circuit. The energy control module 3 charges the charging battery 51 of the energy storage module 5 with the electric energy generated by the self-generation module 2 through rectification, filtering and voltage stabilization. At the same time, another working battery 51 is regulated by the energy control module 3 to provide a stable current for the mouse control module 4, thereby realizing self-power supply of the system.

[0048] The energy control module 3 is connected to the self-generating module 2, the mouse control module 4, and the energy storage module 5 through wires, and includes a rectifier, a filter, and a voltage stabilizing charging circuit. Figure 4 The diode of the bridge rectifier circuit is 1N4001 suitable for low-frequency applications, the voltage regulator can be CW7805, the filter energy storage capacitor can be 0.01F 16V aluminum electrolytic capacitor, and the battery 51 conversion is controlled by the power management integrated circuit. The battery 51 monitoring chip can be MCP73831 and other common chips. The power management integrated circuit PMIC can be TPS22918, BQ76920 and other common chips, which are used to monitor the battery 51 status, switch the working battery 51 and the rechargeable battery 51, and adjust the energy required by the mouse control module.

[0049] The energy storage module 5 includes two 300mAh micro lithium-ion batteries 51, which are generally used in small devices such as Bluetooth headsets. They are small in size and mass, have high energy density, and have a long cycle life. They are connected to the energy control module 3 through wires and can switch between the charging and discharging states of the two batteries 51 to achieve rapid energy supply and response of the mouse.

[0050] The mouse control module 4 is connected to the energy control module 3 through a wire, which is a common structure of a common wireless mouse 1. It includes a control chip, a sensor, a Bluetooth module, etc. For example, the nRF52840 microcontroller chip integrated with a Bluetooth module is used with a PAW3204 optical sensor to collect user input signals and convert and output the signals.

[0051] In daily use, the time from a person pressing the button 11 once to releasing it is usually 50ms-300ms. When using some software that requires long dragging, the pressing time may be extended to several seconds. Due to the polymer properties of the polyurethane-graphene composite material, the flexoelectric effect lasts for a long time. The composite of graphene also greatly improves the response speed of the flexoelectric effect. Therefore, whether it is a quick click to release the button 11 or a long drag, energy can be collected. At the same time, the unique three-layer structure of the sensing plate 221 makes it greatly deformed when it is pressed by the array-arranged cone 212. The strain gradient generated thereby will introduce the flexoelectric effect, which can be superimposed with the piezoelectric effect to further improve the power generation efficiency. The addition of the flexible layer 2212 also plays a role in buffering and absorbing energy, greatly improving the fatigue resistance of the upper and lower materials, and reducing energy loss. The support layer 2213 has high rigidity, which limits the displacement and deformation of the sensing plate 221 as a whole, thereby improving the stability of the structure.

[0052] With the specific structure and parameters, the power generation can be calculated. Usually, the flexoelectric effect of three-dimensional materials can be expressed as:

[0053]

[0054] Among them, P i is the electric polarization intensity in one coordinate axis direction, α ijk The flexoelectric effect coefficient corresponding to this direction is: For this directional strain gradient, in this embodiment, the pressure direction transmitted by the key 11 and the polarization direction of the cone 212 have been determined, and the expression of the flexoelectric effect can be simplified to:

[0055]

[0056] Where P is the electric polarization intensity, the unit is C / m 2 , α is the flexoelectric effect coefficient, unit is C / m 2 , is the strain gradient. Similarly, the expression of the piezoelectric effect is:

[0057] P = dσ;

[0058] Where d is the piezoelectric coefficient, in C / N, and σ is the mechanical stress, in N / m 2 .

[0059] Since the strain gradient measurement of the cone 212 is very complicated, it is difficult to determine the flexoelectric effect coefficient. However, in this embodiment, the flexoelectric effect is similar to the piezoelectric effect, so the equivalent piezoelectric coefficient d′ can be introduced. iii, where the first subscript i represents the force direction, and the second subscript i represents the polarization direction. In this embodiment, both directions are perpendicular to the z-axis direction of the substrate 211, so both are taken as 3, that is, d′ 33 , which is recorded as d'. Therefore, the flexoelectric effect of the cone 212 can be approximated as a piezoelectric effect to simplify the calculation, wherein the calculation method of d' is as follows:

[0060]

[0061] Where D is the electric displacement, unit is C / m 2 Q is the charge, in C. F is the pressure, in N. S is the cross-sectional area of ​​the material, in m 2 I is the current, in A. f is the frequency of the alternating load, in Hz. E' is the equivalent elastic modulus, in N / m 2 ε is strain, dimensionless. From the above formula, it can be seen that for a given material, as long as the relationship curve between current and strain I-ε is measured under a fixed alternating load, the corresponding equivalent piezoelectric coefficient d′ can be calculated from the formula based on its slope.

[0062] After determining the equivalent piezoelectric coefficient d′, the formula can be used in reverse to calculate the charge, that is, the required power generation. The calculation method is as follows:

[0063]

[0064] dQ = d'dF;

[0065] Q=d′∫dF=d′F t ;

[0066] In the formula, F t is the total force on a single cone 212. The charge Q calculated in this way is approximately equivalent. It is more complicated to accurately calculate the charge Q, and it is necessary to know the exact distribution of the electric polarization intensity on the upper and lower surfaces of the material. If the distribution of the electric polarization intensity on the upper surface of the cone 212 is The electric polarization intensity distribution on the lower surface is Then from the formula P=D=dQ / dS, we can know that the charge Q is:

[0067]

[0068] Where r 1 represents the radius of the upper surface of the inverted cone 212; r 2 represents the radius of the lower surface of the inverted cone 212; ρ represents the distance from the current point on the surface to the center point of the surface; The angle between the line connecting the current point on the surface and the center point of the surface and the set direction. After the charge Q of a single cone 212 is calculated using the above method, the power generation Q of the self-generating module 2 can be calculated. t , calculated as follows:

[0069]

[0070] Where n is the number of times the user presses button 11, n 0 is the amount of the porous polyurethane-graphene composite material on the substrate 211, Q 0 is the power generation when the button 11 is pressed once, d e is the piezoelectric coefficient of the sensing plate 221, d′ e is the equivalent piezoelectric coefficient of the sensing plate 221.

[0071] In this embodiment, due to the existence of rectification, filtering and voltage stabilization circuits, the charging voltage is limited to 5V. For the selected 0.01F 16V aluminum electrolytic capacitor, the maximum charge that can be provided to the battery 51 is 0.11C, and the charging current is about 100mA. The charging time is short, and the charging time can be 1s, then the single charge capacity is about 0.028mAh, that is, 10714 charges can fully charge a 300mAh lithium-ion battery 51. Considering the protection of the lithium-ion battery 51, the power of the lithium-ion battery 51 can be controlled at 20%-80% under the control of the battery 51 monitoring module and the power management circuit. At this time, only 6428 charges are required to complete the charging process.

[0072] In this preferred embodiment, considering the power consumption of various chips and devices, even if it is used continuously with high intensity, the maximum power consumption of the mouse reaches 10mA. The healthy power range of 180mAh can also make the mouse work continuously for 18 hours. All that is needed is to press the button 11 6428 times within 18 hours, that is, to offset the energy loss by pressing the button 11 6 times per minute when the mouse is used heavily. Obviously, this can be done. In normal use, the power consumption of the mouse will be greatly reduced, and the power consumption will drop below 1mA when in standby mode, so it is easier to complete charging under light use over a long span of time.

[0073] During the charging process, since the charging current is very small, the heat generated will be very low and will hardly affect the battery 51. Moreover, since the charging amount each time is small, the battery 51 is flexibly switched under the control of the monitoring module and the power management integrated circuit, and the power is controlled in a healthy range of 20%-80%. It is always in a good condition and will not significantly increase the number of charging cycles, which has limited impact on the long-term life of the battery 51.

[0074] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-frequency automatic power supply wireless mouse system, characterized in that: The invention comprises a wireless mouse (1), a self-generating module (2) installed inside the wireless mouse (1), and an energy control module (3) for charging the electric energy generated by the self-generating module (2) into a battery (51) of the wireless mouse (1); the self-generating module (2) comprises a flexoelectric structure (21) and a piezoelectric structure (22) sandwiched between a button (11) and a mouse base (12); the flexoelectric structure (21) and the piezoelectric structure (22) can be deformed simultaneously under the action of pressing the button (11) to generate electric energy through the flexoelectric effect and the piezoelectric effect respectively.

2. A low-frequency automatic power supply wireless mouse system according to claim 1, characterized in that: The flexoelectric structure (21) comprises a substrate (211) fixedly connected to the inner side surface of the key (11); a plurality of cones (212) arranged in an array are fixedly mounted on the lower surface of the substrate (211); the cones (212) are made of flexoelectric material; each cone (212) can generate the flexoelectric effect under the action of pressing the key (11); the bottom end of each cone (212) abuts against the pressing end of the piezoelectric structure (22) to transmit the pressing action of the key (11) to the piezoelectric structure (22).

3. A low-frequency automatic power supply wireless mouse system according to claim 2, characterized in that: Each cone (212) is inverted and vertically fixedly mounted on the lower surface of the base plate (211).

4. The low-frequency automatic power supply wireless mouse system according to claim 3, characterized in that: A plurality of groups of weight-reducing holes (2121) are provided on the conical surface of each cone (212), each group of weight-reducing holes (2121) is evenly distributed around the cone (212), and each weight-reducing hole (2121) in the same group is evenly arranged in sequence along the generatrix direction of the group.

5. The low-frequency automatic power supply wireless mouse system according to claim 4, characterized in that: The base plate (211) is fixedly mounted on the key (11) via a connecting rod (13) fixed on its upper surface.

6. A low-frequency automatic power supply wireless mouse system according to any one of claims 1-5, characterized in that: The piezoelectric structure (22) is crimped under the flexure electric structure (21), and the piezoelectric structure (22) comprises a sensing plate (221) made of a piezoelectric material; the sensing plate (221) comprises a sensing layer (2211) and a supporting layer (2213) arranged in sequence from top to bottom, the sensing layer (2211) constitutes a pressing end of the piezoelectric structure (22), and the supporting layer (2213) is supported and installed on a mouse base (12); a flexible layer (2212) is sandwiched between the sensing layer (2211) and the supporting layer (2213) in electrical contact, and the hardness of the flexible layer (2212) is less than that of the sensing layer (2211) and the supporting layer (2213).

7. A low-frequency automatic power supply wireless mouse system according to claim 6, characterized in that: The support layer (2213) is fixedly mounted on the mouse base (12) via a conductive column (222) fixed at the bottom thereof.

8. The low-frequency automatic power supply wireless mouse system according to claim 7, characterized in that: The cone (212) is made of a polyurethane-graphene composite material, the substrate (211) is made of an aluminum-based carbon fiber composite material, and the substrate (211) is connected to the energy control module (3) via a wire.

9. The low-frequency automatic power supply wireless mouse system according to claim 8, characterized in that: The electric energy generated in the piezoelectric structure (22) is transmitted to the energy control module (3) through the conductive column (222) and the conductive wire.

10. The low-frequency automatic power supply wireless mouse system according to claim 9, characterized in that: The total amount of electricity generated by the self-generating module (2) is Q t , the calculation formula is as follows: Q t =nn0Q+nn0F t (d e +d′ e ); In the formula, n represents the number of times the button (11) is pressed; n0 represents the number of cones (212); Q represents the amount of power generated when a single cone (212) is pressed once; F t represents the total force received by a single cone (212) during a pressing process; d e represents the piezoelectric coefficient of the sensing plate (221); d′ e represents the equivalent piezoelectric coefficient of the sensing plate (221); In the formula, represents the distribution of electric polarization intensity on the upper surface of the inverted cone (212); represents the distribution of the electric polarization intensity of the lower surface of the inverted cone (212); r1 represents the radius of the upper surface of the inverted cone (212); r2 represents the radius of the lower surface of the inverted cone (212); ρ represents the distance from a point on the current surface to the center point of the surface; It represents the angle between the line connecting the point on the current surface and the center point of the surface and the set direction; dS represents the area differential; Wherein, f represents the frequency of the alternating load in the sensing plate (221); E′ represents the equivalent elastic modulus of the sensing plate (221); S e represents the piezoelectric area of ​​the sensing plate (221); It represents the first-order derivative of the current I in the sensing plate (221) with respect to the strain ε, that is, the slope of the relationship curve I(ε).

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