Piezoelectric safety protection device, driver and smart home control system
By introducing piezoelectric safety devices into smart furniture actuators and using piezoelectric sensors to monitor the extension and retraction status in real time, the problems of slow response speed and high cost are solved, enabling fast and accurate obstacle detection and avoiding pinching accidents.
Patent Information
- Application Number
- CN202423179363.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-21
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-21
AI Technical Summary
Existing smart furniture actuators suffer from slow response speed, insufficient accuracy, or high cost during telescopic movements, leading to potential risks of pinching injuries.
The device employs a piezoelectric safety protection system, which uses a piezoelectric sensor to detect obstacles by generating voltage changes through deformation. The actuator stops or extends in the opposite direction when an obstacle is detected, thus preventing pinching accidents.
It achieves fast and accurate obstacle detection, effectively avoiding pinching accidents and reducing system costs.
Smart Images
Figure CN223650910U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of smart home technology, and in particular to a piezoelectric safety protection device, driver and smart home control system. Background Technology
[0002] With the continuous development of smart home technology, smart furniture has become an important part of modern homes. Smart furniture not only possesses the functionality of traditional furniture, but also incorporates advanced sensor technology, drive systems, and intelligent control algorithms to achieve a more convenient, comfortable, and safe user experience.
[0003] However, potential safety hazards exist in the automation process of smart furniture, especially when it involves the extension and retraction of actuators, such as the risk of pinching injuries. Therefore, developing an effective protection system is crucial to ensure user safety.
[0004] Traditionally, smart furniture safety systems have relied on mechanical limiters or photoelectric sensors to detect obstacles and prevent collisions. However, these systems often suffer from slow response times, insufficient accuracy, or high costs. Utility Model Content
[0005] In view of this, one of the objectives of this utility model is to provide a piezoelectric safety protection device to solve the technical problems of slow response speed, insufficient accuracy or high cost in the prior art of using mechanical limit devices or photoelectric sensors to detect obstacles and avoid collisions.
[0006] The second objective of this utility model is to provide a driver containing a piezoelectric safety protection device.
[0007] The third objective of this utility model is to provide a smart home control system containing a driver.
[0008] To achieve one of the above objectives, this utility model provides a piezoelectric safety protection device, including a housing and a column disposed within the housing. The column is provided with a piezoelectric sensor on at least one side. The column moves relative to the housing within the housing. The column squeezes the piezoelectric sensor, and the piezoelectric sensor changes voltage due to deformation to determine whether an obstacle has been encountered.
[0009] Optionally, the piezoelectric sensor includes:
[0010] A first piezoelectric sensor is disposed between the first end of the column and the housing. When the column moves along the first direction, it squeezes and deforms the first piezoelectric sensor and generates a voltage.
[0011] The second piezoelectric sensor is disposed between the second end of the column and the housing. When the column moves in the second direction, it compresses the second piezoelectric sensor to deform and generate voltage.
[0012] Optionally, one end of the housing is provided as a connection end for connecting to the driver. The housing has a through hole, and a pin passes through the through hole to connect to the column. The pin is fixedly set. When the driver drives the housing to move using the connection end, the column moves relative to the housing inside the housing.
[0013] Optionally, a linear bearing is provided between the housing and the column.
[0014] Optionally, the through hole is located on the opposite side wall of the housing, the column is provided with a through hole, and the pin passes through both the through hole and the through hole.
[0015] Optionally, a pad is provided on both sides of the piezoelectric sensor.
[0016] Optionally, it also includes a wire mounting base, which is disposed on the outer wall of the housing.
[0017] Optionally, the wire mounting base is provided with a wire hole, through which the wire is electrically connected to the piezoelectric sensor.
[0018] To achieve the second objective mentioned above, this utility model provides a driver, including any of the piezoelectric safety protection devices described above, and further including a drive module and a control module. The drive module is drivenly connected to the piezoelectric safety protection device, and the piezoelectric sensor in the piezoelectric safety protection device is electrically connected to the control module.
[0019] To achieve the third objective mentioned above, this utility model provides an intelligent home control system, including the aforementioned driver.
[0020] The piezoelectric safety protection device provided by this utility model has the following technical effects:
[0021] This safety protection device mainly consists of a housing and a column. The column is installed inside the housing, and at least one side of the column has a piezoelectric sensor. The column moves relative to the housing, and the column squeezes the piezoelectric sensor. The piezoelectric sensor deforms, causing a change in voltage, thereby determining whether an obstacle has been encountered. If the voltage of the piezoelectric sensor exceeds a preset voltage value, it indicates that the actuator has encountered an obstacle. If the voltage of the piezoelectric sensor does not exceed the preset voltage value, it indicates that the actuator has not encountered an obstacle. This invention is based on the principle of piezoelectric effect. By utilizing the deformation of the piezoelectric sensor to generate electrical energy, it monitors the extension and retraction state of the actuator and promptly controls the actuator to stop or extend in the reverse direction when a potential pinching risk occurs, thereby effectively avoiding the occurrence of pinching accidents.
[0022] The driver provided by this utility model has the following technical effects:
[0023] This type of actuator includes a piezoelectric safety protection device, a drive module, and a control module. The drive module is connected to the piezoelectric safety protection device, and the piezoelectric sensor inside the piezoelectric safety protection device is electrically connected to the control module. The piezoelectric sensor inside the piezoelectric safety protection device converts the deformation signal into a voltage signal and transmits it to the control module. The control module then controls the drive module to stop driving or turn, thereby effectively preventing pinching accidents.
[0024] The smart home control system provided by this utility model includes a driver, which effectively avoids pinching accidents. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the safety protection device of this utility model;
[0027] Figure 2 yes Figure 1 Front view of the safety protection device in the middle;
[0028] Figure 3 yes Figure 2 A cross-sectional view of the central safety protection device along the AA direction;
[0029] Figure 4 yes Figure 1 Exploded view of the safety protection device.
[0030] in, Figures 1-4 :
[0031] 1. Housing; 11. Threaded connector; 12. End cap; 13. Through hole; 2. Wire mounting base; 3. Wire; 4. Column; 41. Through hole; 51. First piezoelectric sensor; 52. Second piezoelectric sensor; 6. Gasket; 7. Linear bearing. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0033] Based on the shortcomings of existing technologies, the following section combines specific examples. Figure 1-3 The structure of a preferred embodiment of the piezoelectric safety protection device of this utility model is described in detail.
[0034] like Figure 1-4 The diagram shown is a preferred embodiment of the piezoelectric safety protection device of this utility model. The piezoelectric safety protection device includes a housing 1 and a column 4. The column 4 is slidably installed inside the housing 1. One end of the housing 1 is a threaded connection seat 11, and the other end is an end cap 12. The end cap 12 and the threaded connection seat 11 seal the two ends of the housing 1. The threaded connection seat 11 is used to connect to the drive module of the driver.
[0035] In addition, the housing 1 of this embodiment is also provided with a piezoelectric sensor. The piezoelectric sensor is in the shape of a disc, with a wire 3 connected to it. The piezoelectric sensor in this embodiment includes two piezoelectric sensors, namely a first piezoelectric sensor 51 and a second piezoelectric sensor 52. That is, each end of the column 4 has a piezoelectric sensor. The column 4 moves relative to the housing 1 inside the housing 1. The column 4 squeezes the piezoelectric sensor, and the piezoelectric sensor changes voltage due to deformation, thereby determining whether an obstacle has been encountered.
[0036] It should be noted that the piezoelectric sensor of this utility model may also include one, which may be located at one end of the column 4 or at the other end of the column 4. As long as the column 4 moves relative to the housing 1 and can achieve the purpose of squeezing the piezoelectric sensor, it is within the protection scope of this utility model.
[0037] This invention is based on the piezoelectric effect, which is the phenomenon of converting mechanical energy into electrical energy, utilizing the property of piezoelectric materials to generate electric charge when subjected to external forces. In recent years, piezoelectric materials have been widely used in energy harvesting, sensors, and actuators. Especially in energy harvesting, piezoelectric energy harvesters have advantages such as simple structure, easy integration, and no need for external power supply, making them a potential energy source for smart home systems.
[0038] Piezoelectric effect: When certain dielectrics are deformed by an external force along a specific direction, polarization occurs within them, resulting in opposite charges appearing on their two opposing surfaces. When the external force is removed, they return to their uncharged state; this phenomenon is called the direct piezoelectric effect. When the direction of the force changes, the polarity of the charges also changes. Conversely, when an electric field is applied along the polarization direction of the dielectric, it deforms; when the electric field is removed, the deformation disappears; this phenomenon is called the inverse piezoelectric effect. Sensors based on the piezoelectric effect of dielectrics are called piezoelectric sensors.
[0039] Piezoelectric sensors utilize the piezoelectric effect to convert pressure or mechanical stress into electrical energy.
[0040] Definition and Principle: Piezoelectric sensors utilize the properties of piezoelectric materials. When subjected to pressure or mechanical stress, the piezoelectric material generates voltage or charge changes, thereby converting mechanical energy into electrical energy. This conversion is achieved through the positive piezoelectric effect, where certain crystals, when subjected to external force, generate opposite charges on their two opposing surfaces, forming an electric field. When the external force is removed, they return to their uncharged state.
[0041] There is a direct proportional relationship between the voltage generated by a piezoelectric sensor and the pressure or mechanical stress:
[0042] Piezoelectric sensors utilize the piezoelectric effect. When an external force is applied to a piezoelectric material, the material deforms, thereby generating a voltage on its surface. Specifically, when pressure is applied to a piezoelectric material, the charge distribution inside the material changes, generating a voltage signal. This voltage signal is directly proportional to the applied pressure; that is, the greater the pressure, the greater the voltage generated.
[0043] Based on the principle of piezoelectric effect, the piezoelectric safety protection device of this invention generates electrical energy by utilizing the deformation of piezoelectric materials, monitors the extension and retraction status of the actuator in real time, and controls the actuator to stop or extend in reverse when a potential pinching risk occurs, thereby effectively avoiding the occurrence of pinching accidents.
[0044] like Figure 2 and Figure 3As shown, in this embodiment, one end of the housing 1 is set as a connecting end, which is preferably a threaded connecting seat 11. The threaded connecting end is used to connect with the driver. The housing 1 is provided with a through hole 13, which is located on the opposite side wall of the housing 1. The column 4 is provided with a through hole 41. The pin passes through both the through hole 13 and the through hole 41. The pin is fixedly set. When the driver drives the housing 1 to move using the connecting end, the column 4 moves relative to the housing 1 inside the housing 1.
[0045] The pin fixing setting in this embodiment refers to the pin being fixed relative to the column 4 and being able to drive the column 4 to slide relative to the housing 1. For example, the pin is hinged to components such as the footrest of the sofa, and the footrest, the pin and the movable column 4 move synchronously.
[0046] In addition, such as Figure 3 As shown, a linear bearing 7 is provided between the housing 1 and the column 4. The linear bearing 7 is used to realize the relative sliding of the column 4 within the housing 1, which supports and guides the column 4, reduces friction and wear, and improves motion accuracy and stability.
[0047] like Figure 3 As shown, both ends of the first piezoelectric sensor 51 and the second piezoelectric sensor 52 are provided with pads 6, wherein the pads 6 are preferably soft pads 6. The pads 6 are used to absorb and disperse the impact force of the column 4 on the first piezoelectric sensor 51 and the second piezoelectric sensor 52, and prevent the first piezoelectric sensor 51 and the second piezoelectric sensor 52 from being damaged by excessive instantaneous pressure.
[0048] For electrical connection with the control module, such as Figure 1 and Figure 2 As shown, it also includes a wire mounting base 2, which is located on the outer wall of the housing 1. The wire mounting base 2 has a wire hole inside, and the wire 3 is electrically connected to the piezoelectric sensor through the wire hole.
[0049] The process of using the piezoelectric safety protection device in this embodiment is as follows:
[0050] One end of the piezoelectric safety device is fixed to the telescopic end of the actuator via a threaded connector 11, and the other end is hinged to the sofa footrest. When the actuator extends or retracts, the telescopic end moves the main body, causing relative movement between the housing 1 and the column 4. This causes the column 4 to deform by pressing against the first piezoelectric sensor 51 or the second piezoelectric sensor 52, thereby generating a voltage. By monitoring the voltage value generated by the first piezoelectric sensor or the second piezoelectric sensor 52, when the voltage of either piezoelectric sensor exceeds a preset value, it indicates that the actuator's telescopic movement has encountered an obstacle. At this time, the actuator will be controlled to stop or the telescopic end will be driven to extend in the opposite direction to avoid pinching accidents.
[0051] This utility model provides an actuator, including a piezoelectric safety protection device, a drive module, and a control module. The drive module is driven and connected to the piezoelectric safety protection device, and the piezoelectric sensor in the piezoelectric safety protection device is electrically connected to the control module.
[0052] This invention provides a smart home control system, including the aforementioned driver.
[0053] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0054] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A piezoelectric safety protection device, characterized in that, The device includes a housing and a column disposed within the housing. The column is provided with a piezoelectric sensor on at least one side. The column moves relative to the housing within the housing. The column compresses the piezoelectric sensor, and the piezoelectric sensor changes voltage due to deformation to determine whether an obstacle has been encountered.
2. The piezoelectric safety protection device according to claim 1, characterized in that, The piezoelectric sensor includes: A first piezoelectric sensor is disposed between the first end of the column and the housing. When the column moves along the first direction, it squeezes and deforms the first piezoelectric sensor and generates a voltage. The second piezoelectric sensor is disposed between the second end of the column and the housing. When the column moves in the second direction, it compresses the second piezoelectric sensor to deform and generate voltage.
3. The piezoelectric safety protection device according to claim 1, characterized in that, One end of the housing is provided as a connection end for connecting to the driver. The housing has a through hole, and a pin passes through the through hole to connect to the column. The pin is fixedly set. When the driver drives the housing to move using the connection end, the column moves relative to the housing inside the housing.
4. The piezoelectric safety protection device according to claim 3, characterized in that, A linear bearing is provided between the housing and the column.
5. The piezoelectric safety protection device according to claim 3, characterized in that, The through hole is located on the opposite side wall of the housing, and the column is provided with a through hole. The pin passes through both the through hole and the through hole.
6. The piezoelectric safety protection device according to claim 3, characterized in that, The piezoelectric sensor has pads on both sides.
7. The piezoelectric safety protection device according to any one of claims 3-6, characterized in that, It also includes a wire mounting base, which is disposed on the outer wall of the housing.
8. The piezoelectric safety protection device according to claim 7, characterized in that, The wire mounting base is provided with a wire hole, and the wire is electrically connected to the piezoelectric sensor through the wire hole.
9. A driver, characterized in that, The piezoelectric safety protection device according to any one of claims 1-8 further includes a drive module and a control module, wherein the drive module is drivenly connected to the piezoelectric safety protection device, and the piezoelectric sensor in the piezoelectric safety protection device is electrically connected to the control module.
10. A smart home control system, characterized in that, Includes the driver as described in claim 9.