Active cooling insoles

Abstract

This utility model discloses an active cooling insole, including an insole body and a fan. A cavity is formed on the insole body, and the fan is disposed within the cavity. The fan includes a housing and a piezoelectric component disposed within the housing. The piezoelectric component includes a piezoelectric part and at least one vibrating plate. The vibrating plate is connected to the piezoelectric part, and the piezoelectric part can drive the vibrating plate to vibrate continuously, providing active ventilation and cooling for the human foot. This active cooling insole integrates a small, lightweight fan within the insole, offering the advantage of active cooling for the foot. Furthermore, by using a parallel structure of the piezoelectric components, the voltage across each piezoelectric part is the same under the same power supply voltage, and each vibrating plate experiences the same electric field. The parallel connection maximizes the deformation of each vibrating plate under this voltage, thereby generating a larger airflow and improving the energy conversion efficiency of the fan within the insole.

Description

Technical Field

[0001] This utility model relates to the field of insole technology, and in particular to an active heat dissipation insole. Background Technology

[0002] Currently, thick, non-breathable foam is commonly used in shoe soles, resulting in low thermal conductivity and poor heat dissipation. During exercise, the feet are enclosed in shoes, and sweating increases dramatically. When sweat accumulates on the soles of the feet, it can easily cause sweating syndrome and foot injuries. Therefore, foot ventilation is a pressing need for athletes.

[0003] To increase the breathability of athletic shoes, current technologies focus on incorporating ventilation holes in the upper or using large-mesh mesh fabric to create the upper, achieving good breathability. Some shoes, such as slippers, also feature perforations running through the top and bottom of the sole. These structures primarily utilize passive heat dissipation, mainly targeting the instep and sides of the foot.

[0004] However, this passive cooling method is overly dependent on environmental conditions, such as temperature differences and airflow. If the outside temperature is high or the temperature difference between the inside and outside of the shoe is small, the cooling effect will be greatly reduced. Utility Model Content

[0005] The purpose of this invention is to provide an active cooling insole that integrates a small, lightweight fan within the insole to achieve active cooling of the feet. The specific technical solution is as follows:

[0006] An active cooling insole includes an insole body and a fan. A cavity is formed on the insole body, and a fan is disposed in the cavity. The fan includes a housing and a piezoelectric component disposed in the housing. The piezoelectric component includes a piezoelectric part and at least one vibrating plate. The vibrating plate is connected to the piezoelectric part, and the piezoelectric part can drive the vibrating plate to vibrate continuously to actively ventilate and cool the human foot.

[0007] Furthermore, the housing includes an air inlet and an air outlet connected together. The air inlet is located on one side of the housing relative to the direction of the human foot, and the air outlet is located closer to the direction of the human toes relative to the air inlet. One side of the vibrating plate is positioned opposite the air inlet, and a channel is formed between the other side of the vibrating plate and the housing. After the vibrating plate guides the gas into the housing, it is discharged along the channel to the air outlet.

[0008] Furthermore, the fans are all embedded in the recessed cavity, with the air outlets facing the direction of the soles of the feet.

[0009] Furthermore, the fan is embedded in the recessed cavity, and the air outlet is positioned in the direction of the human toes.

[0010] Furthermore, the air outlet is positioned far away from the air inlet.

[0011] Furthermore, both the air inlet and the air outlet are designed as strip structures, with the air inlet extending longitudinally along the insole body and the air outlet extending laterally along the insole body.

[0012] Furthermore, the cavity is located in the arch and / or heel area of ​​the human foot.

[0013] Furthermore, multiple piezoelectric components are arranged in an array within the housing, and the piezoelectric components are electrically connected in parallel.

[0014] Furthermore, it also includes an amplification section disposed on the vibrating plate, the inherent vibration frequency of the amplification section being the same as the vibration frequency of the vibrating plate, so as to increase the vibration amplitude of the vibrating plate.

[0015] Furthermore, the piezoelectric part includes a first piezoelectric block, one end of the vibrating plate is connected to the first piezoelectric block, and an amplification part is provided on the other end of the vibrating plate; or, the piezoelectric part includes a first piezoelectric block and a second piezoelectric block arranged opposite to each other, the two ends of the vibrating plate are respectively connected to the first piezoelectric block and the second piezoelectric block, and the amplification part is provided in the middle of the vibrating plate.

[0016] Furthermore, the shell material is at least one of polyimide and its composites, carbon fiber epoxy resin and magnesium-aluminum alloy; and / or, the vibrating plate material is a metal or polymer material.

[0017] Furthermore, it also includes a battery and an inverter component connected to the battery. The inverter component is electrically connected to the piezoelectric component, which is connected to an AC electric field. The battery is placed on the bottom surface of the insole, and the inverter component is placed at the bottom of the cavity.

[0018] The active heat dissipation insole of this invention has the following advantages:

[0019] 1. By setting a flat concave cavity on the insole body, setting a flat shell inside the concave cavity, and setting a piezoelectric component inside the shell, the fan formed by the piezoelectric component is integrated into the insole, and the insole has the advantage of active ventilation and heat dissipation.

[0020] 2. By setting up piezoelectric components in parallel, the voltage across each piezoelectric element is the same under the same power supply voltage, and each vibrating element is subjected to the same electric field. The parallel connection method can maximize the deformation of each vibrating element under the voltage, thereby generating a larger air volume and improving the energy conversion efficiency of the fan inside the insole.

[0021] 3. The piezoelectric components that generate airflow inside the insole are small in size and lightweight, and can be flexibly arranged to form fan structures of different specifications, thus making the overall structure of the insole lightweight and highly integrated.

[0022] 4. The insole has high rigidity. The fan in the arch area of ​​the insole can provide stable support for the human arch, improve the transition propulsion and anti-torsion effect during the push-off phase. Moreover, this position avoids the metatarsophalangeal joint, so it does not affect the natural flexion of the metatarsophalangeal joint, thus improving the comfort and athletic performance of the human foot. Attached Figure Description

[0023] Figure 1 This diagram shows the positional relationship between the active heat dissipation insole of this invention and the human foot.

[0024] Figure 2 This is a three-dimensional schematic diagram of the active heat dissipation insole of this utility model.

[0025] Figure 3 This is a cross-sectional view of one embodiment of the active heat dissipation insole of this utility model.

[0026] Figure 4 This is a cross-sectional view of Embodiment 2 of the active heat dissipation insole of this utility model.

[0027] Figure 5 This is a three-dimensional schematic diagram of the fan in the active heat dissipation insole of this utility model.

[0028] Figure 6 for Figure 5 Longitudinal sectional view of the central fan.

[0029] Figure 7 This is a schematic diagram of the parallel structure of the piezoelectric component of the fan in the insole of this utility model.

[0030] Figure 8 This is a schematic diagram of the piezoelectric component in Embodiment 1 of this utility model.

[0031] Figure 9 This is a schematic diagram of the piezoelectric component in Embodiment 2 of this utility model.

[0032] Figure 10 This is a schematic diagram of the parallel structure of the piezoelectric components in Embodiment 1 of this utility model. Detailed Implementation

[0033] To better understand the purpose, structure, and function of this utility model, the active heat dissipation insole of this utility model will be described in detail below with reference to the accompanying drawings.

[0034] like Figures 1 to 6As shown, the active cooling insole 50 includes an insole body and a fan 70. The insole body has a concave cavity with an opening facing the direction of the human foot. The concave cavity has a flat structure. The fan 70 has a flat housing 10. The fan 70 is disposed in the concave cavity. A piezoelectric component 20 is disposed in the housing 10, thereby integrating the fan 70 into the insole. The fan 70 provides active ventilation and cooling to the human foot through the air inlet 11 and air outlet 12 on the fan 70.

[0035] Specifically, the insole body includes a forefoot area 51, an arch area 52, and a heel area 53 connected in sequence. Since nearly half of runners land in the forefoot area 51, the arch area 52 and the heel area 53 are defined as the first area. The fan 70 can then be placed in the first area to reduce the pressure impact on the fan 70 during landing. Moreover, the position 55 where the human metatarsophalangeal joint flexes corresponds to the forefoot area 51. This first area avoids the location of the human metatarsophalangeal joint, does not affect the natural flexion of the metatarsophalangeal joint, and improves the comfort and athletic performance of the human foot.

[0036] like Figure 3 As shown, a recessed cavity is disposed in the first region, and the depth of the cavity is the same as the thickness of the fan 70, thus completely embedding the fan 70 within the cavity. The housing 70 includes a communicating air inlet 11 and an air outlet 112, both located on the side of the housing relative to the direction of the human foot. Since a gap channel is created between the foot and the insole when the foot moves, the placement of the air inlet 11 and the air outlet 112 facing this gap channel allows for air intake and exhaust through the gap channel, thereby creating a rapid airflow between the foot and the insole, which helps to increase the air volume. Furthermore, this structure, in which the fan 70 is completely embedded within the recessed cavity, allows the fan 70 and the active cooling insole 50 to form a complete and unified structure, keeping the side of the active cooling insole 50 in contact with the human foot flat and improving wearing comfort.

[0037] Preferably, the fan 70 is located in the arch area 52. Since the human foot arch has an inward indentation, on the one hand, the air inlet 11 on the housing 10 can keep the airflow unobstructed, and on the other hand, the high rigidity of the fan 70 as a whole can provide stable support for the human foot arch, improving the transition propulsion and anti-torsion effect during the push-off phase.

[0038] like Figure 4As shown, when the concave cavity is set in the arch area, the inward indentation of the human foot arch, forming a cavity with the insole, allows the fan 70 to be partially embedded within the concave cavity, while the other part protrudes upward into the cavity formed by the arch and insole. This provides support for a high arch and, combined with the air inlet 11 and air outlet 212 connected on the housing 10 (the air inlet 11 being located on the side of the housing 10 relative to the direction of the foot, and the air outlet 212 protruding from the plane of the insole and located on the side of the housing 10 relative to the direction of the toes), allows the air generated by the fan 70 to flow along the plane of the insole, increasing the efficiency of airflow between the insole and the sole of the foot, resulting in better ventilation and heat dissipation. Alternatively, the concave cavity can be set in the heel area, with part of the fan 70 embedded within the concave structure. This arrangement increases the overall thickness of the insole in the heel area, helping to adjust gait, making steps more natural and fluid, and also providing a height-enhancing effect.

[0039] Understandably, the opening of the cavity can also face other directions. After the fan is placed into the cavity, slots can be set on the insole to achieve the airflow effect of the air inlet and outlet.

[0040] Furthermore, the air outlets 112 and 212 of the fan 70 are located away from the air inlet 11 and near the edge of the cavity. By placing the air outlets 112 and 212 at the edge of the cavity, compared to exhausting near the air inlet 11, this method avoids cross-flow between the exhaust air and the air around the air inlet 11, avoids turbulence, can more effectively guide airflow, and form an airflow around the foot faster, increasing and enhancing the air volume, thereby improving ventilation and heat dissipation.

[0041] Preferably, the air inlet 11 and the air outlets 112 and 212 are both set as strip structures. The direction of the line connecting the forefoot area 51 and the heel area 53 of the insole body is defined as longitudinal, and the direction of the line connecting the inner side and the outer side of the insole body is defined as transverse. The air inlet 11 is set to extend longitudinally along the insole body to correspond to the piezoelectric component set longitudinally, thereby increasing the air intake. The air outlet is set to extend transversely along the insole body, thereby increasing the gas flow efficiency and air volume of the insole in the longitudinal direction.

[0042] The fan 70 is fixed in the cavity of the active cooling insole 50 by polyurethane adhesive. The polyurethane adhesive can maintain a certain degree of softness and elongation after curing, which ensures that the fan 70 can be firmly kept in the active cooling insole 50 even under dynamic conditions, and is not easy to fall off, thus extending the service life of the connection between the fan 70 and the active cooling insole 50.

[0043] like Figures 5 to 7As shown, the fan 70 includes a housing 10, a piezoelectric component 20, and a power module 30. The housing 10 is provided with an air inlet 11 and an air outlet 12. Multiple piezoelectric components 20 are disposed inside the housing 10. The power module 30 includes a battery and an inverter component connected to the battery. The inverter component can convert the DC power of the battery into AC power. The power module 30 is electrically connected to the piezoelectric component 20 and supplies AC power to it. The piezoelectric component 20 includes a piezoelectric part 21 and at least one vibrating plate 22. The end of the vibrating plate 22 is connected to the piezoelectric part 21. According to the inverse piezoelectric effect, when an alternating electric field is applied to both ends of the piezoelectric part 21, the electric field applied by the piezoelectric part 21 along the electric field direction will generate corresponding mechanical stress, causing the material to elongate or shorten in this direction. The deformation generated by the piezoelectric part 21 will drive the vibrating plate 22 to reciprocate and deflect. When the frequency of the alternating electric field is consistent with the natural frequency of the vibrating plate 22, the vibrating plate 22 can achieve a large deflection, thereby driving the air around the vibrating plate 22 to flow, achieving the effect of fanning.

[0044] The power module 30 of the fan 70 generates electrical energy using a button battery 60 or fiber triboelectric power generation. By connecting the positive and negative terminals of the inverter component to the positive and negative terminals of the piezoelectric part 21, the DC power of the power module 30 is converted into AC power to excite the piezoelectric part 21 to vibrate. The inverter component can be a micro inverter or a circuit set on a flexible circuit board, thus giving the fan 70 the advantages of small mass, small size, light weight and high integration.

[0045] The battery 60 is disposed on the bottom surface of the insole and located in the first area for easy replacement. The inverter assembly is disposed at the bottom of the recess, making full use of the recess space and improving the integration of the insole body and the fan. In addition, the fan is equipped with a switch on the insole for manual control of the fan's start and stop. The switch is preferably located in the first area for easy operation.

[0046] The piezoelectric components 20 in the fan 70 are arranged in an array, and each piezoelectric component 20 is connected to the power module 30 in parallel. Therefore, under the same power supply voltage, the voltage across each piezoelectric component 21 is the same. This means that under the same applied voltage, each vibrating element 22 will be subjected to the same electric field. The parallel connection maximizes the deformation of each vibrating element 22 under that voltage, thereby improving the energy conversion efficiency of the fan 70 and generating a larger airflow.

[0047] It should be noted that the array arrangement of the piezoelectric components 20 refers to the uniform distribution of the piezoelectric components 20 in rows and columns within a plane. The spacing between each piezoelectric component 20 is basically the same in both the row and column directions. This arrangement helps to make the fan 70 a flat structure that can be accommodated within a flat structure such as the active cooling insole 50. On the other hand, it creates a uniform airflow and smooth air flow inside the fan 70, improving airflow efficiency and making it easier to manufacture.

[0048] Preferred, such as Figure 7 As shown, a block-shaped amplification section 23 is provided on the vibrating plate 22. The natural vibration frequency of the amplification section 23 is the same as that of the vibrating plate 22. This allows the piezoelectric component 20 to enter a resonant state. In this resonant state, the piezoelectric component 20 can effectively accumulate energy. Even a small deformation of the piezoelectric section 21 can cause a significant response from the vibrating plate. Under resonant conditions, the input energy can be transferred more efficiently from the vibrating plate 22 to the amplification section 23, further amplifying the mechanical motion. The vibrating plate 22 and the amplification section 23 have good energy matching, reducing energy loss and improving the overall energy conversion efficiency, thereby achieving the highest vibration mode. The amplification section 23 can be fixed to the diaphragm plate by bonding or welding to increase the amplitude of the vibrating plate 22. It should be noted that "same vibration frequency" includes both completely identical frequencies and the case where the natural vibration frequency of the amplification section 23 is close to the vibration frequency of the vibrating plate 22.

[0049] Furthermore, such as Figure 8 As shown, the vibrating plate 22 is configured with a structure fixed at both ends. That is, the piezoelectric part 21 includes a first piezoelectric block 121 and a second piezoelectric block 122 disposed opposite to each other. The two ends of the vibrating plate 22 are respectively connected to the first piezoelectric block 121 and the second piezoelectric block 122. The amplification part 23 is disposed in the middle of the vibrating plate 22 to further increase the amplitude of the middle region of the vibrating plate 22. This structure of fixing both ends of the vibrating plate 22 provides higher mechanical stability. During high-frequency vibration, the vibrating plate 22 can maintain better shape and performance consistency. On the other hand, since both ends of the vibrating plate 22 are fixed, the possibility of mechanical waves generated by the vibration of the vibrating plate 22 propagating to the surrounding environment is reduced, thus reducing noise and minimizing the impact on other components. Moreover, the fixed-end configuration of the vibrating plate 22 can more evenly distribute the stress applied to the piezoelectric part 21, thereby extending the service life of the piezoelectric assembly 20.

[0050] It is understandable that, such as Figure 9As shown, the vibrating plate 22 can also be configured with one end fixed, that is, the piezoelectric part 21 includes a first piezoelectric block 221, one end of the vibrating plate 22 is connected to the first piezoelectric block 221, and an amplifying part 23 is provided on the other end of the vibrating plate 22. That is, only one end of the vibrating plate 22 is fixed to the piezoelectric part 21. On the one hand, the end with the amplifying part 23 can achieve greater deflection and oscillation, which helps to improve airflow efficiency. On the other hand, since the first piezoelectric block 221 can directly drive the unfixed end of the vibrating plate 22, the entire piezoelectric assembly 20 responds to the input AC electric field faster. In addition, this structure is simple to set and easier to manufacture and maintain.

[0051] Preferably, the vibration frequency of the piezoelectric part 21 is greater than 20KHz, so as to reduce the vibration noise of the piezoelectric component 20, in other words, to make its vibration frequency in a high-frequency region that is imperceptible to the human ear.

[0052] like Figure 5 and Figure 6 As shown, the housing 10 of the fan 70 is designed as a flat square structure to fit flat structures such as the active cooling insole 50. Since the piezoelectric component 20 is a relatively flat strip structure, this structure allows the piezoelectric component 20 to fully utilize its internal space. The housing 10 includes a connected air inlet 11 and an air outlet 12. The air inlet 11 is located near the vibrating plate 22 to improve the efficiency of the vibrating plate 22 in drawing in air from the air inlet 11. Multiple air inlets 11 are provided, each corresponding to a vibrating plate 22 in each piezoelectric component 20, ensuring a continuous and stable airflow to each piezoelectric component 20. A channel 13 is formed on the other side of the vibrating plate 22, facing the air outlet 12, so that the airflow generated by the vibrating plate 22 converges to the same movement path before being discharged to the air outlet 12, avoiding turbulence in the airflow inside the fan 70 and increasing the airflow of the fan 70.

[0053] Furthermore, the material of the housing 10 is at least one of polyimide and its composite materials, carbon fiber epoxy resin and magnesium-aluminum alloy. The density of the housing 10 material is less than 2.0 m / g and the flexural modulus is greater than 100 GP. The purpose of selecting this material is that the fan 70 is used in environments such as the active cooling insole 50 where repeated deformation and pressure changes occur. It is necessary to ensure the lightweight and rigidity of the fan 70, and also to effectively improve the deformation resistance of the piezoelectric component 20 inside the housing 10.

[0054] The piezoelectric element 21 can be made of materials such as ceramic, quartz, or polymer. Ceramic is used in this invention because it has a high piezoelectric coefficient, enabling it to more effectively convert alternating current signals into mechanical stress. Furthermore, under the same voltage, ceramic can produce greater deformation, increasing the deformation amplitude of the vibrating plate 22. The vibrating plate 22 is made of a tough metal sheet or a polymer material sheet with both toughness and strength. These materials help resist fatigue damage caused by repeated bending and vibration, extending the service life of the vibrating plate 22. They also allow for a faster response to voltage changes and quicker deformation, thereby accelerating the response speed of the piezoelectric component 20 and improving energy utilization efficiency.

[0055] It is understandable that the fan 70 of this invention, due to the small size and light weight of its internal piezoelectric component 20 that generates airflow, can be flexibly arranged to form fan 70 structures of different specifications. This results in a miniaturized, lightweight, and highly integrated overall structure for the fan 70. Besides being installed in shoe insoles, it can also be integrated into other wearable items such as clothing, pants, shoe soles, and hats, achieving the same active ventilation and heat dissipation effect. It boasts high adaptability and versatility. Furthermore, because the fan 70 has a complete and easy-to-install structure, and the cost of repair and replacement is low when the fan 70 is damaged.

[0056] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings and taking the specific structure of the active heat dissipation insole as an example, will provide a more detailed description of the active heat dissipation insole of this utility model.

[0057] Example 1, as Figure 3 , Figure 8 and Figure 10 As shown, the active cooling insole 50 has a concave cavity with an opening facing the sole of the foot on the arch area 52. The flat fan 70 is completely embedded in the concave cavity of the active cooling insole 50, that is, the top of the fan 70 is flush with the top surface of the active cooling insole 50. An air outlet 12 is provided on the fan 70 near the edge of the concave cavity of the active cooling insole 50, and the air outlet 12 faces the sole of the foot. An air inlet 11 is provided on the surface close to the arch area 52. The fan 70 and the active cooling insole 50 are fixed with polyurethane adhesive.

[0058] The fan 70 includes a rigid housing 10, a flexible drive circuit board and its connecting wires, a piezoelectric component 20, and a drive power supply. The housing is made of 0.8mm thick carbon fiber epoxy resin board, and has a flat rectangular structure with dimensions of 4.5mm high, 40mm wide, and 50mm long. The flexible drive circuit board includes a flexible body, a drive unit, and drive terminals. The flexible body is made of a polyimide plastic layer and can be bent arbitrarily. The drive unit is mounted on the flexible body and can move with it. The drive power supply is a 1mm thick button battery 60. The button battery 60 is embedded in the heel area 53 of the active cooling insole 50 and positioned close to the fan 70 to avoid affecting running comfort. The battery is electrically connected to the drive circuit board.

[0059] The fan 70 includes four sets of piezoelectric components 20, arranged in a two-row, two-column array and connected in parallel. Each piezoelectric component includes two seven-layer piezoelectric sections made of lead zirconate titanate material, specifically a first piezoelectric block 121 and a second piezoelectric block 122, with an adjustable resonant frequency range of 20kHz to 50kHz. The piezoelectric components also include two vibrating plates 22, which are stacked alternately between the first and second piezoelectric blocks 121 and 122. The vibrating plates 22 are made of 50CrV alloy, and each vibrating plate 22 has an amplifying section 23 in the center. The amplifying section 23 is made of copper and is glued to the vibrating plate 22. The metal vibrating plates 22 are then glued to the first and second piezoelectric blocks 121 and 122.

[0060] Example 2, as Figure 4 and Figure 9 As shown, the active cooling insole 50 has a concave cavity with an opening facing the sole of the foot on the arch area 52. A flat fan 70 is partially embedded in the concave cavity of the active cooling insole 50. Specifically, 80%-90% of the thickness of the fan 70 is set in the concave cavity. An air outlet 12 is set on the edge of the concave cavity of the fan 70, facing the toes 54. An air inlet 11 is set on the surface close to the arch area 52. The fan 70 and the active cooling insole 50 are fixed with polyurethane adhesive.

[0061] The fan 70 includes a rigid housing 10, a flexible drive circuit board and its connecting wires, a piezoelectric component 20, and a drive power supply. The housing is made of 0.8mm thick fiberglass epoxy resin board, and has a flat rectangular structure with dimensions of 4.5mm high, 46mm wide, and 58mm long. The flexible drive circuit board includes a flexible body, a drive unit, and drive terminals. The flexible body is made of polyimide plastic and can be bent arbitrarily. The drive unit is mounted on the flexible body and can move with it. The drive power supply is a 2mm thick button battery 60. The button battery 60 is embedded in the heel area 53 of the active cooling insole 50 and positioned close to the fan 70 to avoid affecting running comfort. The battery is electrically connected to the drive circuit board.

[0062] The fan 70 includes six sets of piezoelectric components 20, arranged in a three-row, two-column array and connected in parallel. Each piezoelectric component includes a nine-layer first piezoelectric block 221 made of lead zirconate titanate, with an adjustable resonant frequency range of 25kHz to 60kHz. The piezoelectric component also includes two vibrating plates 22, which are stacked at intervals and connected at one end to the first piezoelectric block 221. The vibrating plates 22 are made of Fe-Ni-Cr alloy steel. An amplifying section 23, made of copper, is provided on the end of the vibrating plate 22 away from the first piezoelectric block 221. The amplifying section 23 is fixed to the vibrating plate 22 by adhesive bonding. The metal vibrating plate 22 is then fixed to the first piezoelectric block 221 by adhesive bonding.

[0063] The active heat dissipation insole of this invention has the following advantages:

[0064] 1. By setting a flat concave cavity on the insole body, setting a flat shell inside the concave cavity, and setting a piezoelectric component inside the shell, the fan formed by the piezoelectric component is integrated into the insole, and the insole has the advantage of active ventilation and heat dissipation.

[0065] 2. By setting up piezoelectric components in parallel, the voltage across each piezoelectric element is the same under the same power supply voltage, and each vibrating element is subjected to the same electric field. The parallel connection method can maximize the deformation of each vibrating element under the voltage, thereby generating a larger air volume and improving the energy conversion efficiency of the fan inside the insole.

[0066] 3. The piezoelectric components that generate airflow inside the insole are small in size and lightweight, and can be flexibly arranged to form fan structures of different specifications, thus making the overall structure of the insole lightweight and highly integrated.

[0067] 4. The insole has high rigidity. The fan in the arch area of ​​the insole can provide stable support for the human arch, improve the transition propulsion and anti-torsion effect during the push-off phase. Moreover, this position avoids the metatarsophalangeal joint, so it does not affect the natural flexion of the metatarsophalangeal joint, thus improving the comfort and athletic performance of the human foot.

[0068] The terms “above,” “below,” and “within” as used above include the number itself; the terms “exceeding” and “excluding” do not include the number itself.

[0069] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0070] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

Claims

1. An active heat dissipation insole, characterized in that, The device includes an insole body and a fan. The insole body has a cavity, and the fan is disposed in the cavity. The fan includes a housing and a piezoelectric component disposed in the housing. The piezoelectric component includes a piezoelectric part and at least one vibrating plate. The vibrating plate is connected to the piezoelectric part, and the piezoelectric part can drive the vibrating plate to vibrate continuously to actively ventilate and dissipate heat from the human foot.

2. The actively heat dissipating shoe pad of claim 1, wherein, The housing includes an air inlet and an air outlet connected together. The air inlet is located on one side of the housing relative to the direction of the human foot, and the air outlet is located closer to the direction of the human toes than the air inlet. One side of the vibrating plate is positioned opposite the air inlet, and a channel is formed between the other side of the vibrating plate and the housing. After the vibrating plate guides the gas into the housing, it is discharged along the channel to the air outlet.

3. The actively heat dissipating shoe pad of claim 2, wherein, The fans are all embedded in the recessed cavity, and the air outlets are set towards the direction of the soles of the feet.

4. The actively heat dissipating shoe pad of claim 2, wherein, The fan is embedded in a recessed cavity, with the air outlet facing the direction of the human toes.

5. The actively heat dissipating shoe pad according to any one of claims 2 to 4, wherein, The air outlet should be positioned far away from the air inlet.

6. The actively heat dissipating shoe pad according to any one of claims 2 to 4, wherein, Both the air inlet and the air outlet are designed as strip structures. The air inlet extends longitudinally along the insole body, and the air outlet extends laterally along the insole body.

7. The actively heat dissipating shoe pad according to any one of claims 1 to 4, wherein, The cavity is located in the arch and / or heel of the foot.

8. The actively heat dissipating shoe pad of any one of claims 1 to 4, wherein, Multiple piezoelectric components are arranged in an array inside the housing, and the piezoelectric components are electrically connected in parallel.

9. The actively heat dissipating shoe pad of claim 8, wherein, It also includes an amplification section provided on the vibrating plate, the natural vibration frequency of which is the same as the vibration frequency of the vibrating plate, so as to increase the vibration amplitude of the vibrating plate.

10. The actively heat dissipating shoe pad of claim 9, wherein, The piezoelectric part includes a first piezoelectric block, one end of the vibrating plate is connected to the first piezoelectric block, and an amplification part is provided on the other end of the vibrating plate; or, the piezoelectric part includes a first piezoelectric block and a second piezoelectric block arranged opposite to each other, the two ends of the vibrating plate are respectively connected to the first piezoelectric block and the second piezoelectric block, and the amplification part is located in the middle of the vibrating plate.

11. The actively heat dissipating shoe pad according to any one of claims 1 to 4, wherein, The shell is made of at least one of polyimide and its composites, carbon fiber epoxy resin and magnesium-aluminum alloy; and / or the vibrating plate is made of metal or polymer material.

12. The actively heat dissipating shoe pad of any one of claims 1 to 4, wherein, It also includes a battery and an inverter component connected to the battery. The inverter component is electrically connected to the piezoelectric component, which is connected to an AC electric field. The battery is placed on the bottom surface of the insole, and the inverter component is placed at the bottom of the cavity.

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