Piezoelectric power generation device and smart home device

Abstract

The application relates to a piezoelectric power generation device, wherein before a trigger rotates to a preset position along a preset direction, a second end is connected with a first pressing plate to limit downward movement of the first pressing plate along a first direction, and the kinetic energy of downward movement of a key can be converted into elastic potential energy of compression of a first elastic element; when the trigger rotates to the preset position along the preset direction, the second end can be completely separated from the first pressing plate, so that the elastic potential energy of the first elastic element can be converted into kinetic energy in the process of downward movement of the first pressing plate. In this way, the elastic potential energy accumulated by the first elastic element is ensured to be the same under different scenes and different user operations, the pressure on the piezoelectric element is the same, and the electric quantity generated by single deformation of the piezoelectric element can be kept consistent. On the other hand, the first elastic element quickly restores, the first pressing plate completes the action in an instant, the time is short and stable, and the electric quantity generated by the piezoelectric element can meet the demand of the electric quantity. The application also provides a smart home device.

Description

Technical Field

[0001] This invention relates to the field of piezoelectric power generation, and in particular to a piezoelectric power generation device and a smart home device. Background Technology

[0002] Piezoelectric materials exhibit the characteristic of generating charge accumulation when subjected to external stress and strain, thus enabling them to convert mechanical energy into electrical energy. Taking piezoelectric ceramics as an example, under external vibration or impact, piezoelectric ceramics deform, outputting charge, which then undergoes energy conversion, rectification, energy storage, and power supply processes before being applied in electrical devices.

[0003] However, the energy conversion efficiency of piezoelectric materials is related to factors such as the magnitude of applied mechanical energy, the degree of deformation, and the deformation speed. This leads to instability in the amount of charge generated by a single deformation of the piezoelectric material, and there are cases where the power generation does not meet the usage requirements, increasing the difficulty of collecting and using the electricity. Summary of the Invention

[0004] Therefore, it is necessary to provide a piezoelectric power generation device that can ensure that the amount of charge generated by a single deformation of the piezoelectric material is consistent and that the required amount of electricity is obtained stably.

[0005] According to one aspect of this application, a piezoelectric power generation device is provided, including a housing, a button movably disposed on the top of the housing along a first direction, and a piezoelectric element disposed on the bottom of the housing, the piezoelectric power generation device further including:

[0006] A trigger element, rotatably disposed within the housing about an axis, has a first end and a second end. The first end is located on the downward movement path of the button in a first direction, so that the trigger element can rotate in a preset direction in response to the button pressing against the first end; and

[0007] An energy storage triggering component is disposed within the housing and located between the button and the piezoelectric element; the energy storage triggering component includes a first pressure plate and a first elastic element disposed between the button and the first pressure plate;

[0008] The trigger has a stop position during the process of rotating along the preset direction to the preset position. The trigger is located at the stop position. The second end abuts against the side wall of the housing to restrict the rotation of the trigger along the preset direction. Before the trigger rotates along the preset direction to the preset position, the second end is connected to the first pressure plate to restrict the first pressure plate from moving downward along the first direction. This allows the kinetic energy of the button moving downward along the first direction to be converted into the elastic potential energy of the first elastic member being compressed.

[0009] The trigger rotates to a preset position along a preset direction, the first elastic element is compressed to the maximum compression amount, and the second end can be completely separated from the first pressure plate, so that the elastic potential energy of the first elastic element can be converted into the kinetic energy of the first pressure plate during the downward movement of the first direction.

[0010] In the aforementioned piezoelectric power generation device, before the trigger rotates to the preset position, the first elastic element is in the energy storage stage. Once the trigger rotates to the preset position, the first elastic element enters the elastic potential energy release stage and acts on the piezoelectric element through the first pressure plate. Therefore, the amount of charge generated by a single deformation of the piezoelectric element is only related to the elastic potential energy stored in the first elastic element. The force and speed at which the user presses the button have little impact on the amount of charge generated by a single deformation of the piezoelectric element. This ensures, on the one hand, that the elastic potential energy stored in the first elastic element remains the same under different scenarios and user operations, and that the pressure on the piezoelectric element is always the same, thus ensuring that the amount of electricity generated by a single deformation of the piezoelectric element remains consistent. On the other hand, the piezoelectric element deforms by compressing the stored elastic potential energy of the first elastic element. When the first pressure plate is released, the first elastic element quickly returns to its original position, and the first pressure plate completes its action in an instant, with a short and stable time, ensuring that the amount of electricity generated by the piezoelectric element can meet the power demand.

[0011] In one embodiment, the energy storage trigger component further includes a second pressure plate disposed on the side of the button facing the first pressure plate;

[0012] The first elastic element is disposed between the first pressure plate and the second pressure plate.

[0013] In one embodiment, the outer edge of the second pressure plate is provided with a guide surface, and the first end of the trigger member is provided with a mating surface adapted to the guide surface;

[0014] The guide surface is used to cooperate with the mating surface during the upward repositioning of the second pressure plate in the first direction to guide the trigger to rotate in a direction opposite to the preset direction.

[0015] In one embodiment, the button has a first pressing part on the side facing the first pressure plate for pressing against the first end, and a second pressing part for pressing against the second pressure plate during the downward movement of the button in the first direction.

[0016] In one embodiment, when no external force is applied to the button, there is a gap between the first end of the trigger and the first pressing part, and the second pressing part contacts the side of the second pressure plate away from the piezoelectric element.

[0017] In one embodiment, the energy storage triggering component further includes a second elastic element;

[0018] The second elastic element is disposed between the first pressure plate and the bottom wall of the inner cavity of the housing, and the second elastic element is configured to be compressible during the downward movement of the first pressure plate in the first direction.

[0019] In one embodiment, before the trigger rotates to a preset position along a preset direction, a preset gap is provided between the first pressure plate and the bottom wall of the inner cavity of the housing along the first direction.

[0020] In one embodiment, the energy storage triggering component further includes a keying section;

[0021] The key pressing part is disposed on the side of the first pressure plate away from the key, and the key pressing part is used to act on the piezoelectric element during the downward movement of the key in the first direction.

[0022] In one embodiment, the piezoelectric power generation device further includes a bottom cover;

[0023] The bottom of the housing is provided with a through hole communicating with the inner cavity of the housing. The keying part extends out through the through hole. The bottom cover is installed on the bottom of the housing. The piezoelectric element is disposed between the housing and the bottom cover.

[0024] In one embodiment, both the first elastic element and the second elastic element are compression springs;

[0025] The first pressure plate has a recessed portion on one side facing the piezoelectric element, and a protrusion corresponding to the recessed portion is formed on the other side of the first pressure plate;

[0026] The first elastic element is sleeved on the protrusion, one end of the first elastic element is connected to the second pressure plate, and the other end of the first elastic element is connected to the first pressure plate;

[0027] The bottom wall of the recessed portion is provided with a mounting portion for mounting the key pressing portion. The second elastic member is sleeved on the mounting portion, and one end of the second elastic member is connected to the bottom wall of the recessed portion, and the other end is connected to the bottom wall of the inner cavity of the housing.

[0028] In one embodiment, the outer edge of the first pressure plate is provided with a first hook portion corresponding to each of the trigger elements;

[0029] The second end of the trigger is provided with a second hook portion. Before the trigger rotates to a preset position in a preset direction, the first hook portion and the second hook portion keep in cooperation to restrict the first pressure plate from moving downward in the first direction.

[0030] The trigger rotates to a preset position along a preset direction, the first hook and the second hook are completely separated, and the first pressure plate can move toward the piezoelectric element and act on the piezoelectric element under the action of the first elastic element.

[0031] In one embodiment, the piezoelectric power generation device includes at least two of the triggers;

[0032] The at least two triggers include at least one set of two triggers that are opposite to each other.

[0033] According to another aspect of this application, a smart home device is provided, including a piezoelectric power generation device as described in any of the above embodiments. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the piezoelectric generator when the button is not pressed in one embodiment of this application;

[0035] Figure 2 for Figure 1 The diagram shows the structure of the piezoelectric power generation device when the trigger rotates to a preset position in a preset direction.

[0036] Figure 3 for Figure 1 The diagram shows the structure of the piezoelectric generator when the trigger rotates to the stop position in a preset direction.

[0037] Figure 4 for Figure 1 The diagram shows the structure of the piezoelectric power generation device at a position during the process of the trigger rotating in the opposite direction to the preset direction.

[0038] Figure 5 for Figure 1 The diagram shows the structural structure of the housing of the piezoelectric power generation device.

[0039] Figure 6 for Figure 1 A schematic diagram of the structure of the first pressure plate of the piezoelectric power generation device shown;

[0040] Figure 7 for Figure 1 A schematic diagram of the trigger element in the piezoelectric power generation device shown;

[0041] Figure 8 for Figure 1 The diagram shows the structure of the button in the piezoelectric power generation device.

[0042] Figure 9 for Figure 1 The diagram shows the structure of the second pressure plate of the piezoelectric power generation device. Detailed Implementation

[0043] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0044] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, this does not indicate any order, quantity, or importance, but is merely used to distinguish different components. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. Words such as “comprising” or “including” mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, without excluding other elements or objects.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0046] With technological advancements, an increasing number of battery-powered devices have emerged on the market. However, discarded batteries cause severe environmental pollution. Therefore, technologies that utilize piezoelectric materials to generate electricity have arisen. Taking piezoelectric ceramics as an example, generally, the amount of electricity generated in a single deformation is limited. In related technologies, piezoelectric ceramics are widely used in vibration energy harvesting, utilizing continuous vibration to generate electricity. However, this type of technology cannot be used in certain specific application scenarios. For example, in smart home devices, users expect the piezoelectric ceramic to generate a stable and uniform amount of electricity the instant the button is pressed, thus meeting the power demand. In practical applications, if the user presses the button slowly, and different users press at different speeds, the amount of charge generated by a single deformation of the piezoelectric material becomes unstable, and the generated electricity may not meet the usage requirements, increasing the difficulty of electricity harvesting and utilization.

[0047] Based on this, this application provides a piezoelectric power generation device that can ensure that the amount of charge generated by a single deformation of the piezoelectric material is consistent and can stably obtain the required amount of electricity.

[0048] To facilitate understanding of the technical solution of this application, some technical principles will be explained below:

[0049] Piezoelectric ceramic power generation: When a piezoelectric ceramic sheet is subjected to an external force, it undergoes mechanical deformation, resulting in a decrease in its polarization intensity. This causes some of the charge attached to the surface of the piezoelectric ceramic sheet to be released, producing a discharge phenomenon. When the external force applied to the piezoelectric ceramic sheet is released, the piezoelectric ceramic sheet returns to its deformed state, the polarization intensity increases, and some charge is adsorbed on the electrodes, resulting in a charging phenomenon. This phenomenon of converting mechanical energy into electrical energy is called the "direct piezoelectric effect".

[0050] like Figures 1-3 As shown, the piezoelectric power generation device in at least one embodiment of the present application includes a housing 10, a button 20, a piezoelectric element 30, an energy storage trigger assembly 40, and a trigger 50.

[0051] Button 20 is movably disposed on the top of housing 10 along the first direction X, and piezoelectric element 30 is disposed on the bottom of housing 10. Button 20 can reciprocate relative to piezoelectric element 30 along the first direction X to provide an energy source for deforming piezoelectric element 30. For example, as Figure 1 and Figure 9 As shown, the top of the housing 10 may be provided with a button hole 16 for the button 20 to extend into. The button 20 can reciprocate along the first direction X under the constraint and guidance of the button hole 16. Here, the first direction X can be the direction from the top of the housing 10 to the bottom.

[0052] A trigger 50 is rotatably disposed within the housing 10 about an axis. The trigger 50 has a first end 52 and a second end 54. The first end 52 is located on the movement path of the button 20 moving downward in a first direction X, so that the trigger 50 can rotate in a preset direction in response to the button 20 pressing against the first end 52. For example, as... Figures 1-3 As shown, when button 20 moves downward along the first direction X, it presses against the first end 52, causing the trigger 50 to rotate in a clockwise direction. Here, the preset direction can be clockwise. In some specific embodiments, the trigger 50 is rotatably connected to the housing 10 via a pivot. The first end 52 and the second end 54 are located on opposite sides of the pivot (not shown in the figure), that is, the pivot is approximately located in the middle of the trigger 50, and the first end 52 and the second end 54 are its two ends extending in different directions.

[0053] It should be noted that, from the user's perspective, when operating button 20, the side of button 20 facing the user is the upper side, and the side of button 20 away from the user is the lower side. Therefore, in this embodiment, "downward along the first direction X" can be defined as the direction in which button 20 moves towards the piezoelectric element 30 along the first direction X. Correspondingly, in this embodiment, "upward along the first direction X" can be defined as the direction in which button 20 moves away from the piezoelectric element 30 along the first direction X.

[0054] An energy storage trigger assembly 40 is disposed within the housing 10 and located between the button 20 and the piezoelectric element 30. The energy storage trigger assembly 40 may include a first pressure plate 42 and a first elastic member 46 disposed between the button 20 and the first pressure plate 42. Before the trigger member 50 rotates to a preset position along a preset direction, its second end 54 is connected to the first pressure plate 42, restricting the first pressure plate 42 from moving downwards along the first direction X, thereby converting the kinetic energy of the button 20 moving downwards along the first direction X into the elastic potential energy of the first elastic member 46. When the trigger member 50 rotates to the preset position along the preset direction, its second end 54 can completely separate from the first pressure plate 42, allowing the elastic potential energy of the first elastic member 46 to be converted into the kinetic energy of the first pressure plate 42 during its downward movement along the first direction.

[0055] It should be noted that the aforementioned preset position is an intermediate critical position during the rotation of the trigger 50. This intermediate critical position can be determined based on the magnitude of the elastic potential energy stored in the first elastic element 46 to meet the requirement of ultimately converting it into electrical energy generated by the deformation of the piezoelectric element 30. For example, in one embodiment, the trigger 50 rotates along a preset direction to a preset position, and the first elastic element 46 can be compressed to its maximum compression. In this way, the pressure and power generation of the piezoelectric element 30 can be further guaranteed by the compression of the first elastic element 46 and the stored elastic potential energy.

[0056] It should be understood that in practical applications, if the user presses button 20 slowly, or if different users press at different speeds, the amount of charge generated by a single deformation of the piezoelectric material becomes unstable, and the power generation may not meet the usage requirements, increasing the difficulty of collecting and using the electricity. In the embodiments of this application, before the trigger 50 rotates along a preset direction to a preset position in response to the pressure of button 20, it belongs to the energy storage stage of the first elastic element 46. When the trigger 50 rotates along the preset direction to the preset position, it is at the critical position for the release of the elastic potential energy of the first elastic element 46. At this time, the first pressure plate 42 can be released, and under the action of the first elastic element 46, the first pressure plate 42 acts on the piezoelectric element 30, causing it to deform and generate charge.

[0057] Therefore, the amount of charge generated by a single deformation of the piezoelectric element 30 is primarily related only to the elastic potential energy stored in the first elastic element 46. The force and speed at which the user presses the button 20 have minimal impact on the amount of charge generated by a single deformation of the piezoelectric element 30. On one hand, this ensures that the elastic potential energy stored in the first elastic element 46 remains the same under different scenarios and user operations, and that the pressure on the piezoelectric element 30 is consistently the same, thus guaranteeing that the amount of electricity generated by a single deformation of the piezoelectric element 30 remains consistent. On the other hand, the piezoelectric element 30 deforms by compressing the stored elastic potential energy of the first elastic element 46. When the first pressure plate 42 is released, the first elastic element 46 quickly returns to its original position, and the first pressure plate 42 completes its action in an instant—a short and stable process—ensuring that the amount of electricity generated by the piezoelectric element 30 meets the power consumption requirements.

[0058] In some embodiments, the piezoelectric power generation device may include at least two triggers 50, including at least one set of two triggers 50 facing each other. In this way, the first pressure plate 42 is prevented from tilting by at least one set of two triggers 50 facing each other, so as to achieve a stable limit during the energy storage stage, thereby allowing the first elastic member 46 to stably accumulate elastic potential energy.

[0059] In some embodiments, the trigger 50 may have a stop position during rotation in a preset direction. When the trigger 50 is in the stop position, its second end 54 abuts against the side wall of the housing 10 to restrict rotation in the preset direction. At this point, the trigger 50 cannot continue to rotate in the preset direction, thus stopping the button 20 and preventing it from moving further downwards in the first direction X to the termination position. This prevents damage to the device caused by overpressure on the button 20, and also allows the user a complete operating stroke during button 20 operation, thereby improving the user experience.

[0060] Specifically, the rotation of the trigger 50 is in response to the button 20 pressing against the first end 52 of the trigger 50. Therefore, the rotation position of the trigger 50 corresponds to the movement position of the button 20 along the first direction X. Specifically, the button 20 has an intermediate position during its downward movement, which corresponds to a preset position of the trigger 50 during its rotation in a preset direction, that is, the critical position where the second end 54 of the trigger 50 is completely separated from the first pressure plate 42.

[0061] For example, such as Figure 1 and Figure 2As shown, before the button 20 moves from the initial position to the intermediate position, the second end 54 of the trigger 50 remains connected to the first pressure plate 42 to restrict the first pressure plate 42 from moving downward along the first direction X. The first elastic member 46 is compressed, so that the kinetic energy of the button 20 moving downward along the first direction X can be converted into the elastic potential energy of the first elastic member 46 being compressed. The button 20 continues to move downward along the first direction X from the intermediate position to the termination position, where the second end 54 of the trigger 50 completely separates from the first pressure plate 42. The first elastic member 46 recovers its deformation, and the elastic potential energy of the first elastic member 46 can be converted into the kinetic energy acting on the piezoelectric element 30 during the downward movement of the first pressure plate 42 along the first direction X.

[0062] like Figure 1 As shown, the initial position of button 20 corresponds to the position when the user has not touched button 20. For example, in some embodiments, when the button is in the initial position, the first elastic member 46 can be in a natural state. Of course, in other embodiments, the first elastic member 46 can also be pre-compressed.

[0063] It is worth emphasizing that button 20 can directly act on the first elastic element 46, thereby compressing the first elastic element 46 during its downward movement in the first direction X. Alternatively, button 20 can be connected via other intermediate components. For example, the energy storage trigger assembly may include a second pressure plate 44 disposed on the side of button 20 facing the first pressure plate 42, with the first elastic element 46 disposed between the first pressure plate 42 and the second pressure plate 44. In this way, button 20 can act on the second pressure plate 44, further enabling the second pressure plate 44 to move downward in the first direction X, thereby compressing the first elastic element 46.

[0064] In some embodiments, such as Figures 1-3 As shown, the energy storage trigger assembly 40 may further include a second elastic element 48, which is disposed between the first pressure plate 42 and the bottom wall of the inner cavity of the housing 10. The second elastic element 48 is configured to be compressible during the downward movement of the first pressure plate 42 along the first direction X. That is, during the release phase of the elastic potential energy of the first elastic element 46, the elastic force of the second elastic element 48 is less than that of the first elastic element 46, thereby ensuring the stable downward pressure of the first pressure plate 42. It should be understood that the second elastic element 48 can, on the one hand, provide a restoring force for the first pressure plate 42 to move upward along the first direction X back to its original position, and on the other hand, prevent the instantaneous release of the elastic potential energy of the first elastic element 46 from causing overvoltage and damaging the piezoelectric element 30.

[0065] Furthermore, such as Figure 1 and Figure 2Before the trigger 50 rotates to a preset position along a preset direction, there is a preset gap between the first pressure plate 42 and the bottom wall of the inner cavity of the housing 10 along the first direction. For example, when the trigger 50 rotates to the aforementioned preset position, the first pressure plate 42 is in a critical state of release, at which point the second elastic member 48 may not be compressed. As the elastic potential energy of the first elastic member 46 is gradually released, the second elastic member 48 is gradually compressed, and the gap between the first pressure plate 42 and the bottom wall of the inner cavity of the housing 10 gradually decreases. After the external force applied to the button 20 is removed, under the action of the second elastic member 48, the first pressure plate 42 can move upward along the first direction X to return to its original position. Thus, the preset gap between the first pressure plate 42 and the bottom wall of the inner cavity of the housing 10 not only reserves space for the second elastic member 48 but also reserves space for the downward stroke of the first pressure plate 42.

[0066] In some embodiments, the energy storage triggering component 40 may further include a keying part 49, which is disposed on the side of the first pressure plate 42 away from the second pressure plate 44. The keying part 49 is used to act on the piezoelectric element 30 during the downward movement of the first pressure plate 42 in the first direction X.

[0067] It is understood that the piezoelectric element 30 can be disposed within the inner cavity of the housing 10 or outside the inner cavity of the housing 10. For example, in some embodiments, the piezoelectric element 30 is disposed within the inner cavity of the housing 10, in which case the position of the second elastic member 48 needs to be spaced apart from the piezoelectric element 30 to avoid mutual interference. For example, the piezoelectric element 30 can be disposed outside the inner cavity of the housing 10; in other embodiments, such as... Figure 5 As shown, the piezoelectric power generation device also includes a bottom cover 80. The bottom of the housing 10 is provided with a through hole 18 communicating with the inner cavity of the housing 10. The keying part 49 extends through the through hole 18. The bottom cover 80 is installed on the bottom of the housing 10, and the piezoelectric element 30 is disposed between the housing 10 and the bottom cover 80. Specifically, a mounting groove (not shown) may be provided on one side of the bottom cover 80. A step is formed at the edge of the groove opening. The piezoelectric element 30 is supported at the step so that a gap 82 is formed between the piezoelectric element 30 and the bottom wall of the mounting groove, providing space for the piezoelectric ceramic sheet 32 ​​of the piezoelectric element 30 to deform.

[0068] In some embodiments, such as Figure 1 and Figure 5 As shown, the housing 10 may include an upper housing 12 and a lower housing 14, which are detachably assembled together to form an internal cavity for accommodating, for example, an energy storage triggering component 40. This facilitates the disassembly, assembly, and maintenance of the piezoelectric power generation device.

[0069] In some embodiments, such as Figure 1 and Figure 6As shown, both the first elastic element 46 and the second elastic element 48 can be compression springs. A recess 422 is formed on the side of the first pressure plate 42 facing the piezoelectric element 30, and a protrusion 424 corresponding to the recess 422 is formed on the other side of the first pressure plate 42. The first elastic element 46 is fitted onto the protrusion 424, with one end connected to the second pressure plate 44 and the other end connected to the first pressure plate 42. The bottom wall of the recess 422 is provided with a mounting portion 423 for mounting the key press part 49. The second elastic element 48 is fitted onto the mounting portion 423, with one end connected to the bottom wall of the recess 422 and the other end connected to the bottom wall of the inner cavity of the housing 10. Thus, by providing the protrusion 424 and the recess 422, mounting space and positioning structures are provided for the first elastic element 46, the second elastic element 48, and the key press part, simplifying the structure.

[0070] In some embodiments, the first pressure plate 42, on the side facing away from the piezoelectric element 30, is further provided with a limiting rib 426 surrounding the protrusion 424. The first elastic member 46 is sleeved on the protrusion 424 and is confined by the limiting rib 426 within the area formed by the protrusion 424 and the limiting rib 426. This ensures that the first elastic member 46 does not shift during compression and release, thereby improving the full conversion of energy. Specifically, in some embodiments, when the button 20 reaches the aforementioned intermediate position, the first elastic member 46 reaches its maximum compression, and the second pressure plate 44 can abut against the limiting rib 426. Thus, by stopping the rotation of the trigger 50 and the second pressure plate 44 abutting against the limiting rib 426, the travel of the button 20 is ensured, and the elastic potential energy accumulated in the first elastic member 46 is precisely controlled, further improving the consistency of single-cycle power generation. Simultaneously, it also protects the first elastic member 46 from overpressure.

[0071] In some embodiments, such as Figure 1 , Figure 6 and Figure 7As shown, the outer edge of the first pressure plate 42 is provided with a first hook portion 428 corresponding to the trigger member 50, and the second end 54 of the trigger member 50 is provided with a second hook portion 59. During the process of the button 20 moving from the initial position to the aforementioned intermediate position, the first hook portion 428 and the second hook portion 59 remain engaged to restrict the first pressure plate 42 from moving downward along the first direction X. When the button 20 moves from the aforementioned intermediate position to the termination position, the first hook portion 428 and the second hook portion 59 completely separate, and the first pressure plate 42 can move towards the piezoelectric element 30 and act on the piezoelectric element 30 under the action of the first elastic member 46. In a specific embodiment, the first hook portion 428 is constructed to form a hook groove with an opening generally facing downward, and the second hook portion 59 is constructed to form a barb that faces generally upward. In this way, during the process of the button 20 moving downward along the first direction X, the trigger member 50 can be limited by the engagement of the second hook portion 59 with the first hook portion 428 of the first pressure plate 42, and completely separate from the first pressure plate 42 after the trigger member 50 rotates to the preset position.

[0072] In some embodiments, such as Figure 1 and Figure 8 As shown, the button 20 has a first pressing portion 22 on the side facing the piezoelectric element 30 for pressing the first end 52 of the trigger member 50, and a second pressing portion 24 for pressing the second pressure plate 44 during the downward movement of the button 20 along the first direction X. When the button 20 is in its initial position, there is a gap between the first end 52 of the trigger member 50 and the first pressing portion 22, and the second pressing portion 24 contacts the side of the second pressure plate 44 away from the piezoelectric element 30. Thus, during the movement of the button 20 from its initial position to the aforementioned intermediate position, the button 20 has a travel distance (corresponding to the gap between the first end 52 and the first pressing portion 22) during which it will not interact with the trigger member 50. This ensures that the button 20 has sufficient downward travel, maximizing the elastic potential energy accumulated in the first elastic member 46, thereby ensuring that the electrical charge generated by the deformation of the piezoelectric element 30 meets the power demand. On the other hand, the rotation stroke of the trigger 50 can be designed to be small enough to ensure precise engagement or separation between the trigger 50 and the first pressure plate 42, thereby improving the reliability and stability of the piezoelectric power generation device.

[0073] It should be noted that the contact between the second pressing part 24 and the second pressure plate 44 means that the second pressing part 24 is only connected to the second pressure plate 44, but will not cause the second pressure plate 44 to move downward along the first direction X.

[0074] In some embodiments, such as Figure 4 , Figure 7 and Figure 9As shown, the outer edge of the second pressure plate 44 is provided with a guide surface 442, and the first end 52 of the trigger member 50 is provided with a mating surface 56 for adapting to the guide surface 442. The guide surface 442 is used to cooperate with the mating surface 56 during the upward return of the second pressure plate 44 in the first direction X to guide the trigger member 50 to rotate in a direction opposite to the preset direction. It can be understood that during the movement of the button 20 from the initial position to the middle position, the second pressure plate 44 is pressed and moves downward in the first direction X, while the trigger member 50 is pressed and rotates in the preset direction, and the first end 52 of the trigger member 50 gradually approaches the central axis of the piezoelectric generator. During the return of the second pressure plate 44, the first end 52 of the trigger member 50 is located on the path of the second pressure plate 44 moving upward in the first direction X. The aforementioned guide surface 442 can make the trigger member 50 rotate stably in a direction opposite to the preset direction during the return of the second pressure plate 44, and make the second end 54 engage with the first pressure plate 42 to limit the first pressure plate 42. This ensures accurate reset of the trigger element 50, improving the reliability of the piezoelectric power generation device.

[0075] In some embodiments, such as Figures 1-4 As shown, the piezoelectric element 30 may include a piezoelectric ceramic sheet 32 ​​and a button spring 34. The button spring 34 is located on one side of the piezoelectric ceramic sheet 32. When pressed with a force exceeding a preset limit, the top arc of the button spring 34 can quickly collapse and contact the piezoelectric ceramic sheet 32, thereby deforming the piezoelectric ceramic sheet 32 ​​to generate electricity. In a specific embodiment, the button spring 34 can be a dome switch, which can be made of ultra-thin (0.05 mm-1.5 mm) and ultra-hard (generally with a hardness between HV480-550) stainless steel material, and has several advantages such as smooth contact, strong conductivity, stable rebound, and excellent feel.

[0076] Based on the same inventive concept, this application also provides a smart home device, which includes the piezoelectric power generation device in any of the above embodiments.

[0077] Specifically, the smart home device can be, for example, a smart device with a communication device capable of sending and receiving signals, such as a smart toilet.

[0078] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A piezoelectric power generation device, comprising a housing, a button movably disposed on the top of the housing along a first direction, and a piezoelectric element disposed on the bottom of the housing, characterized in that, The piezoelectric power generation device also includes: A trigger element, rotatably disposed within the housing about an axis, has a first end and a second end. The first end is located on the downward movement path of the button in a first direction, so that the trigger element can rotate in a preset direction in response to the button pressing against the first end; and An energy storage triggering component is disposed within the housing and located between the button and the piezoelectric element; the energy storage triggering component includes a first pressure plate and a first elastic element disposed between the button and the first pressure plate; The trigger has a stop position during the process of rotating along a preset direction to a preset position. The trigger is located at the stop position. The second end abuts against the side wall of the housing to restrict the rotation of the trigger along the preset direction and stop the button. Before the trigger rotates along the preset direction to the preset position, the second end is connected to the first pressure plate to restrict the first pressure plate from moving downward along the first direction. This allows the kinetic energy of the button moving downward along the first direction to be converted into the elastic potential energy of the first elastic member being compressed. The trigger rotates to a preset position along a preset direction, the first elastic element is compressed to the maximum compression amount, and the second end can be completely separated from the first pressure plate, so that the elastic potential energy of the first elastic element can be converted into the kinetic energy of the first pressure plate during the downward movement of the first direction.

2. The piezoelectric power generation device according to claim 1, characterized in that, The energy storage trigger component also includes a second pressure plate disposed on the side of the button facing the first pressure plate; The first elastic element is disposed between the first pressure plate and the second pressure plate.

3. The piezoelectric power generation device according to claim 2, characterized in that, The outer edge of the second pressure plate is provided with a guide surface, and the first end of the trigger is provided with a mating surface adapted to the guide surface; The guide surface is used to cooperate with the mating surface during the upward repositioning of the second pressure plate in the first direction to guide the trigger to rotate in a direction opposite to the preset direction.

4. The piezoelectric power generation device according to claim 2, characterized in that, The button is provided with a first pressing part for pressing against the first end on the side facing the first pressure plate, and a second pressing part for pressing against the second pressure plate during the downward movement of the button in the first direction.

5. The piezoelectric power generation device according to claim 4, characterized in that, When no external force is applied to the button, there is a gap between the first end of the trigger and the first pressing part, and the second pressing part contacts the side of the second pressure plate away from the piezoelectric element.

6. The piezoelectric power generation device according to any one of claims 1-5, characterized in that, The energy storage triggering component also includes a second elastic element; The second elastic element is disposed between the first pressure plate and the bottom wall of the inner cavity of the housing, and the second elastic element is configured to be compressible during the downward movement of the first pressure plate in the first direction.

7. The piezoelectric power generation device according to claim 6, characterized in that, Before the trigger rotates to a preset position along a preset direction, a preset interval is provided between the first pressure plate and the bottom wall of the inner cavity of the housing along the first direction.

8. The piezoelectric power generation device according to claim 6, characterized in that, The energy storage triggering component also includes a keying section; The key pressing part is disposed on the side of the first pressure plate away from the key, and the key pressing part is used to act on the piezoelectric element during the downward movement of the key in the first direction.

9. The piezoelectric power generation device according to claim 8, characterized in that, The piezoelectric power generation device also includes a bottom cover; The bottom of the housing is provided with a through hole communicating with the inner cavity of the housing. The keying part extends out through the through hole. The bottom cover is installed on the bottom of the housing. The piezoelectric element is disposed between the housing and the bottom cover.

10. The piezoelectric power generation device according to claim 9, characterized in that, Both the first elastic element and the second elastic element are compression springs; The first pressure plate has a recessed portion on one side facing the piezoelectric element, and a protrusion corresponding to the recessed portion is formed on the other side of the first pressure plate; The energy storage triggering component further includes a second pressure plate disposed on the side of the button facing the first pressure plate, the first elastic member being disposed between the first pressure plate and the second pressure plate, the first elastic member being sleeved on the protrusion, one end of the first elastic member being connected to the second pressure plate, and the other end of the first elastic member being connected to the first pressure plate; The bottom wall of the recessed portion is provided with a mounting portion for mounting the key pressing portion. The second elastic member is sleeved on the mounting portion, and one end of the second elastic member is connected to the bottom wall of the recessed portion, and the other end is connected to the bottom wall of the inner cavity of the housing.

11. The piezoelectric power generation device according to any one of claims 1-5, characterized in that, The outer edge of the first pressure plate is provided with a first hook portion corresponding to each of the trigger elements; The second end of the trigger is provided with a second hook portion. Before the trigger rotates to a preset position in a preset direction, the first hook portion and the second hook portion keep in cooperation to restrict the first pressure plate from moving downward in the first direction. The trigger rotates to a preset position along a preset direction, the first hook and the second hook are completely separated, and the first pressure plate can move toward the piezoelectric element and act on the piezoelectric element under the action of the first elastic element.

12. The piezoelectric power generation device according to any one of claims 1-5, characterized in that, The piezoelectric power generation device includes at least two of the aforementioned triggers; The at least two triggers include at least one set of two triggers that are opposite to each other.

13. A smart home device, characterized in that, Includes the piezoelectric power generation device as described in any one of claims 1-12.

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