Load-bearing monitoring device for electric lifting table and electric lifting table

Abstract

The utility model discloses a load-bearing monitoring device for an electric lifting table and the electric lifting table, the electric lifting table comprises a table top, an I-shaped supporting assembly, a lifting driving device and a manual control terminal, the load-bearing monitoring device comprises a first load-bearing sensor and a display module, and the first load-bearing sensor is arranged on a connecting piece of the table top and a lifting regulation and control component; the bearing first sensor is used for sensing the bearing weight of the desktop, and the display module is used for displaying the value of the bearing weight of the desktop in real time. Due to the fact that the bearing weight of the table top can be displayed in real time, it is guaranteed that the bearing weight of the table top cannot be overloaded when the electric lifting table ascends and descends, and safety and reliability of the electric lifting table are greatly improved.

Description

Technical Field

[0001] This application relates to the field of smart furniture technology, specifically to a load-bearing monitoring device for an electric height-adjustable desk and the electric height-adjustable desk itself. Background Technology

[0002] Electric height-adjustable desks are generally used as smart office furniture, but with the increasing demand for home offices, they are now widely used in homes, such as as computer desks or study desks. Electric height-adjustable desks are electrically powered and can easily achieve automatic height adjustment to meet the personalized needs of different users. For aesthetic reasons, the desktops of electric height-adjustable desks are increasingly made of transparent materials like glass, and more and more items are placed on them. Taking an electric height-adjustable desk as a desktop computer desk as an example, it needs to accommodate various computer accessories such as the computer case, lighting, monitor, speakers, and printer. If the desktop remains stationary, the weight limit of the desktop is not a major concern. However, during the height adjustment process, the driving force provided by the motor has an upper limit; if the weight is overloaded, the drive motor will be damaged. Utility Model Content

[0003] The main technical problem this application addresses is how to ensure that the load-bearing capacity of the tabletop of an electric height-adjustable desk is not overloaded during height adjustment.

[0004] According to the first aspect, one embodiment provides a load-bearing monitoring device for an electric height-adjustable desk, the electric height-adjustable desk including a desktop, an I-beam support assembly, a lifting drive device, and a hand control terminal;

[0005] The I-beam support assembly includes a lifting and adjusting component and a fixed support component, wherein the lifting and adjusting component and the fixed support component are connected in a sleeve manner; the lifting and adjusting component is fixedly connected to the desktop, and the fixed support component is used to horizontally support the desktop through the lifting and adjusting component;

[0006] The lifting drive device is mounted on the I-beam support assembly. The lifting drive device is used to adjust the fitting depth between the lifting control component and the fixed support component by rotating the drive motor, so as to control the lifting height of the electric lifting table.

[0007] The handheld terminal is electrically connected to the lifting drive device; the handheld terminal is equipped with a button switch, which outputs a lifting electrical signal to the lifting drive device by turning the button switch on or off, so that the lifting drive device can raise and lower the desktop in response to the lifting electrical signal;

[0008] The load-bearing monitoring device includes a first load-bearing sensor and a display module;

[0009] The first load-bearing sensor is installed on the connector between the desktop and the lifting control component, and the first load-bearing sensor is used to sense the load-bearing weight of the desktop.

[0010] The display module is used to display the value of the load-bearing weight.

[0011] In one embodiment, a first load-bearing sensor is provided on each of the connecting parts between the desktop and the lifting control component to measure the load-bearing weight of the desktop at different positions and display it through the display module.

[0012] In one embodiment, the desktop is transparent, and the display surface of the display module is disposed under the desktop.

[0013] In one embodiment, the load-bearing monitoring device further includes a second load-bearing sensor; the second load-bearing sensor is disposed on the ground-contacting table leg of the fixed support member, and one second load-bearing sensor is disposed on each ground-contacting table leg; the second load-bearing sensor is used to measure the load-bearing capacity of the ground-contacting table leg and displays it through the display module.

[0014] In one embodiment, the first load-bearing sensor and the second load-bearing sensor are also connected to the lifting drive device;

[0015] During the lifting control of the electric height-adjustable desk, if the load-bearing weight sensed by at least one of the first load-bearing sensors and at least one of the second load-bearing sensors increases, and the load-bearing weight sensed by the other first load-bearing sensors and the second load-bearing sensors decreases, the lifting drive device determines that the lifting of the electric height-adjustable desk is obstructed, and stops the lifting of the desktop or causes the desktop to rebound upon encountering obstruction.

[0016] During the lifting control of the electric height-adjustable desk, if the load-bearing weight sensed by at least one of the first load-bearing sensors and at least one of the second load-bearing sensors decreases, and the load-bearing weight sensed by the other first load-bearing sensors and the second load-bearing sensors increases, the lifting drive device determines that the lifting of the electric height-adjustable desk is obstructed, and stops the lifting of the desktop or causes the desktop to rebound upon encountering obstruction.

[0017] In one embodiment, the first load-bearing sensor is also connected to the lifting drive device to send the load-bearing weight of the desktop to the lifting drive device, so that the lifting drive device can set the drive current of the motor that controls the lifting speed of the desktop based on the load-bearing weight of the desktop.

[0018] In one embodiment, the lifting drive device sets the drive current of the motor that controls the lifting speed of the desktop based on the maximum or average value of the load sensed by the first load sensor.

[0019] In one embodiment, the type of the first load-bearing sensor includes an S-type load-bearing sensor, a cantilever load-bearing sensor, or a spoke-type load-bearing sensor.

[0020] In one embodiment, the display module is further configured to display the maximum load-bearing weight of the desktop, and to display an overload warning message when the load-bearing weight of the desktop exceeds a preset weight value.

[0021] According to the second aspect, one embodiment provides an electrically adjustable desk, including the load monitoring device as described in the first aspect.

[0022] According to the load-bearing monitoring device in the above embodiment, since it can display the load-bearing weight of the desktop in real time, it can ensure that the load-bearing weight of the desktop of the electric height-adjustable desk will not be overloaded when it is raised and lowered, thus greatly improving the safety and reliability of the electric height-adjustable desk. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an electric height-adjustable table in one embodiment;

[0024] Figure 2 This is a schematic diagram of the structure of the electric height-adjustable table in another embodiment;

[0025] Figure 3 This is a structural block diagram of a lifting monitoring system in one embodiment;

[0026] Figure 4 This is a side view of an embodiment of an electrically adjustable table;

[0027] Figure 5 This is a block diagram of the load-bearing monitoring device in one embodiment;

[0028] Figure 6 This is a structural block diagram of a grating monitoring device in one embodiment;

[0029] Figure 7 This is a schematic diagram of the principle of a grating infrared through-beam sensor in one embodiment;

[0030] Figure 8 This is a cross-sectional schematic diagram of the sleeve assembly of the I-beam support component in one embodiment. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0032] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0033] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0034] The height monitoring system is the core component of an electric height-adjustable desk. It utilizes an electrically driven motor and mechanical and electronic components to automatically adjust the desk height. Generally, such systems offer features like height adjustment, anti-collision sensors, sedentary reminders, and wireless or voice remote control. However, the most crucial function of the monitoring system is to ensure a smooth and stable lifting process, preventing wobbling or instability caused by rapid speed changes. This protects items on the desk from slipping or tipping over, ensuring user safety. Furthermore, a smooth lifting speed reduces noise, minimizing user disturbance, and provides greater comfort, thus enhancing the user experience.

[0035] In existing technologies, ensuring uniform lifting speed of an electric height-adjustable desk is achieved by controlling the constant drive current of the motor. The desktop lifting speed is read by a Hall sensor mounted on the motor, and the position and speed of the desk's uprights are typically detected by Hall effect devices on the motor shaft to determine the motion status. However, in actual use, the desktop of an electric height-adjustable desk will have items placed on it (e.g., computers, books, lamps, and / or household appliances), resulting in uncertain and uneven load distribution. Therefore, using a single drive current for lifting control cannot guarantee that the lifting and lowering speeds will remain consistent even under heavy loads. It should be noted that ensuring uniform desktop lifting speed reduces motor load and wear, extends motor lifespan, and thus ensures the stability and durability of the electric height-adjustable desk.

[0036] Furthermore, when remotely controlled via wireless or voice, users are generally not near the table, creating safety hazards during the lifting process (e.g., collisions and jamming). Therefore, specific lifting protection mechanisms such as emergency stop, reversal, and / or initialization reset are necessary. Currently, collision and jamming detection in electric height-adjustable desks relies on changes in the drive motor's current. However, when the desk's surface load is heavy, this can cause excessive drive current (the greater the load, the greater the lifting power required, and thus the greater the drive motor current), leading to misjudgments and malfunction warnings. Clearly, relying solely on the drive motor's current for uniform desktop lifting speed monitoring poses safety risks. Developing multiple monitoring methods for desktop lifting speed is a major research direction of this application.

[0037] Furthermore, in the actual use of electric height-adjustable desks, the lifting speed should be kept as constant as possible (referring to different adjustment times), because if the speed changes during the lifting control, it will easily cause user operation errors, especially exceeding the expected lifting distance.

[0038] In this embodiment of the application, a load-bearing monitoring device is provided on the electric height-adjustable table to monitor the load-bearing weight of the tabletop and set the drive current of the motor that drives the tabletop to move up and down according to the load-bearing weight, so that the electric height-adjustable table can be controlled to move up and down at a preset first speed, thereby keeping the speed of the electric height-adjustable table constant and reducing operational errors caused by the user's misjudgment of the speed of the tabletop.

[0039] Example 1:

[0040] Please refer to Figure 1The diagram illustrates the structure of an electrically adjustable desk in one embodiment. The desk includes a desktop 1, an I-beam support assembly 2, and a lifting drive device 3. The I-beam support assembly includes a lifting control component and a fixed support component, which are connected in a sleeved manner. The lifting control component is fixedly connected to the desktop, and the fixed support component is used to horizontally support the desktop via the lifting control component.

[0041] Please refer to Figure 2 The diagram below shows the structure of an electric height-adjustable table in another embodiment. In one embodiment, the lifting drive device is mounted on the I-beam support assembly. The lifting drive device is used to adjust the fitting depth between the lifting control component 21 and the fixed support component 22 by driving the motor to rotate, so as to control the lifting height of the tabletop 1 of the electric height-adjustable table.

[0042] Please refer to Figure 3 The diagram below shows a structural block diagram of a lifting monitoring system 5 in one embodiment. The lifting monitoring system 5 includes a load-bearing monitoring device 51, a gyroscope monitoring device 52, and a grating monitoring device 53. The load-bearing monitoring device monitors the load-bearing weight of the desktop in real time and converts the load-bearing weight into a load-bearing electrical signal, which is then sent to the lifting drive device 3. When the electric lifting desk raises or lowers the desktop, the lifting drive device 3 sets the drive current of the motor 4 according to the value of the load-bearing electrical signal, so that the desktop can be raised or lowered at a preset first lifting speed. The gyroscope monitoring device 52 monitors the lifting acceleration of the desktop in real time and sends the lifting acceleration to the lifting drive device 3. The lifting drive device 3 verifies the first lifting speed based on the lifting acceleration. In one embodiment, when the lifting acceleration is zero, the desktop is in a stationary state or a uniform lifting state; when the lifting acceleration is not zero, the desktop will enter a braking state or a non-uniform lifting state. The grating monitoring device 53 is used to monitor the fitting depth values ​​of the lifting control component 21 and the fixed support component 22 in real time, so as to obtain the relative moving speed of the lifting control component 21 and the fixed support component 22 based on the change in fitting depth values, and send the relative moving speed to the lifting drive device 3. The lifting drive device 3 is used to verify the first lifting speed based on the relative moving speed. The lifting drive device 3 is also used to stop the lifting operation of the electric lifting table when the difference between the relative moving speed and the first lifting speed is greater than a preset upper limit value during the lifting control process of the electric lifting table.

[0043] In one embodiment, the method of setting the motor drive current based on the value of the load-bearing electrical signal is to obtain the drive current value of the motor when the tabletop is raised and lowered at a first lifting speed by testing different load-bearing weights, so as to obtain the load-bearing weight and drive current correspondence curve. Then, when the electric height-adjustable table is raised and lowered, the motor drive current is set according to the current load-bearing weight of the tabletop and the load-bearing weight and drive current correspondence curve.

[0044] Please refer to Figure 4The diagram shows a side view of an electrically adjustable desk in one embodiment. In this embodiment, the load-bearing monitoring device includes a first load-bearing sensor 23, which is mounted on the connector between the desktop and the lifting control component 21, with one sensor on each connector. The first load-bearing sensor 23 senses the weight of the desktop. In another embodiment, the load-bearing monitoring device includes a second load-bearing sensor 24, which is mounted on the ground-contacting legs of the fixed support component 22, with one sensor on each ground-contacting leg. The second load-bearing sensor 24 measures the pressure exerted on the ground by each corner of the electrically adjustable desk, and also monitors whether abnormal deformation occurs in the I-beam support component based on the different pressures exerted on each corner.

[0045] In one embodiment, the lifting drive device is further configured to, during the lifting control of the electric height-adjustable table, determine that the lifting of the table is obstructed if the load-bearing weight sensed by at least one first load-bearing sensor and at least one second load-bearing sensor increases, while the load-bearing weight sensed by other first load-bearing sensors and second load-bearing sensors decreases, and then stop the lifting or perform a tabletop rebound upon encountering an obstacle. Alternatively, the lifting drive device is further configured to, during the lifting control of the electric height-adjustable table, determine that the lifting of the table is obstructed if the load-bearing weight sensed by at least one first load-bearing sensor and at least one second load-bearing sensor decreases, while the load-bearing weight sensed by other first load-bearing sensors and second load-bearing sensors increases, and then stop the lifting or perform a tabletop rebound upon encountering an obstacle. When the pressure on one side of the electric height-adjustable table suddenly increases or decreases, while the pressure on other sides reverses, it can be generally determined that an obstacle has been encountered during the lifting process, and a protective stop or rebound operation can be performed.

[0046] In one embodiment, the grating monitoring device includes a grating infrared through-beam sensor, which comprises an infrared emitter and a receiver. The infrared emitter and receiver are respectively fixedly mounted on the lifting control component and the fixed support component to obtain the relative movement speed based on the rate of change of the receiver's light-receiving position. In one embodiment, the grating monitoring device is also used to obtain the tabletop height of the electric height-adjustable table based on the light-receiving position of the receiver. In one embodiment, the infrared emitter and receiver are disposed within the cavity of a sleeve assembly for connecting the lifting control component and the fixed support component.

[0047] In one embodiment, the gyroscope monitoring device includes an electronic gyroscope, which is fixedly connected to the desktop. The electronic gyroscope is used to monitor the lifting acceleration of the electric height-adjustable desk during the lifting process. In another embodiment, the electronic gyroscope is also used to monitor the change in lifting acceleration during the lifting process to determine whether the desktop has reached the reset position during resetting and to confirm that the lifting process has been stopped. In one embodiment, if the value of the lifting acceleration changes abruptly from zero to another value and then returns to zero, it can be determined that the desktop has completed the braking and stopping process. Compared with traditional current circuit detection circuits, the electronic gyroscope achieves the resetting function of the height-adjustable desk by using an accelerometer gyroscope and related circuits. When the upright of the height-adjustable desk needs to be reset and the overall position is initialized, the descending upright will collide with the mechanical position, generating load and acceleration changes. The corresponding signal processing circuit then determines whether the lifting drive device has stopped and the reset is complete. Traditional methods typically use current detection circuits for judgment, which require additional steps to detect load changes and process sampling signals. This results in low accuracy, high latency, and limited detection parameters. When an electronic gyroscope is applied to the reset function of an electric height-adjustable desk, it can more accurately measure and determine the reset conditions using speed and acceleration parameters. Through a fast-response, high-precision sampling and signal processing circuit, it can more accurately identify whether the desktop has been completely reset, making the electric height-adjustable desk more precise, faster, and safer during the reset process.

[0048] In one embodiment of this application, a lifting monitoring method is also disclosed for use in the lifting monitoring system described above. The lifting monitoring method monitors the load-bearing weight of the tabletop of the electric lifting desk, and when the electric lifting desk is lifted and lowered at a preset first lifting speed, the driving current of the motor that drives the lifting and lowering motion of the tabletop is set according to the load-bearing weight of the tabletop.

[0049] In one embodiment, the lifting monitoring method further includes a first lifting speed setting function, specifically including:

[0050] The system responds to a preset speed value input by the user as the first lifting speed. It then re-observes the drive current value of the motor while maintaining the lifting speed at the first speed under different desktop load conditions through testing, thereby obtaining a curve showing the relationship between load and drive current. In one embodiment, the lifting speed is verified during the testing process using a gyroscope monitoring device and a grating monitoring device.

[0051] The lifting monitoring system disclosed in this application includes a load-bearing monitoring device, a gyroscope monitoring device, and a grating monitoring device. The load-bearing monitoring device monitors the desktop load of the electric height-adjustable desk, the gyroscope monitoring device monitors the lifting acceleration of the desktop, and the grating monitoring device monitors the change in the embedding depth of the I-beam support assembly of the electric height-adjustable desk to obtain the relative movement speed. During the lifting control process, the lifting drive device of the electric height-adjustable desk sets the drive current of the motor providing lifting power according to the load weight, so that the desktop rises and falls at a preset first lifting speed. The first lifting speed is verified during the lifting process by measuring the lifting acceleration and relative movement speed. By setting different motor drive currents according to different loads to ensure a constant desktop lifting speed, the safety and reliability of the electric height-adjustable desk are greatly improved, thereby enhancing the user experience.

[0052] Example 2:

[0053] One embodiment of this application also discloses a load-bearing monitoring device for an electric height-adjustable desk. The electric height-adjustable desk includes a desktop, an I-beam support assembly, a lifting drive device, and a handheld terminal. The I-beam support assembly includes a lifting adjustment component and a fixed support component. The lifting adjustment component and the fixed support component are connected by a sleeve arrangement. The lifting adjustment component is fixedly connected to the desktop, and the fixed support component is used to horizontally support the desktop via the lifting adjustment component. The lifting drive device is mounted on the I-beam support assembly and is used to adjust the sleeve depth between the lifting adjustment component and the fixed support component by rotating a drive motor, thereby controlling the lifting height of the electric height-adjustable desk. The handheld terminal is electrically connected to the lifting drive device and is equipped with a push-button switch. The push-button switch outputs a lifting electrical signal to the lifting drive device when it is turned on or off, so that the lifting drive device can respond to the lifting electrical signal to raise or lower the desktop.

[0054] Please refer to Figure 5 A block diagram of a load-bearing monitoring device in one embodiment is shown. The load-bearing monitoring device 51 includes a first load-bearing sensor 23 and a display module 25. The first load-bearing sensor 23 is disposed on the connector between the desktop and the lifting control component, and is used to sense the load-bearing weight of the desktop. The display module 25 is used to display the value of the load-bearing weight. In one embodiment, a first load-bearing sensor is disposed on each connector between the desktop and the lifting control component to measure the load-bearing weight at different positions of the desktop and display it through the display module 25.

[0055] In one embodiment, the tabletop of the electrically adjustable desk includes a transparent area (e.g., glass or plastic), and the display surface of the display module 25 is disposed below the transparent area, with the display shown through the transparent area. Because the display module 25 is disposed below the transparent area of ​​the tabletop, it does not occupy any space on the table.

[0056] In one embodiment, the load-bearing monitoring device further includes a second load-bearing sensor 24, which is disposed on the ground-contacting table legs of the fixed support member, with one second load-bearing sensor 24 disposed on each ground-contacting table leg. The second load-bearing sensor 24 is used to measure the load-bearing capacity of the ground-contacting table legs and displays it through the display module 25. In home use, the electric height-adjustable table will be placed in a home environment such as on the floor, carpet, or tile, and displaying the weight bearing capacity of the table legs can remind you to protect the floor.

[0057] like Figure 5 As shown, in one embodiment, the first load-bearing sensor 23 and the second load-bearing sensor 24 are also connected to the lifting drive device 3. During the lifting control of the electric height-adjustable desk, if the load-bearing weight sensed by at least one first load-bearing sensor and at least one second load-bearing sensor increases, and the load-bearing weight sensed by the other first load-bearing sensors and second load-bearing sensors decreases, the lifting drive device determines that the lifting of the electric height-adjustable desk is obstructed and stops the desk lifting or performs a desk rebound upon encountering obstruction; or, during the lifting control of the electric height-adjustable desk, if the load-bearing weight sensed by at least one first load-bearing sensor and at least one second load-bearing sensor decreases, and the load-bearing weight sensed by the other first load-bearing sensors and second load-bearing sensors increases, the lifting drive device determines that the lifting of the electric height-adjustable desk is obstructed and stops the desk lifting or performs a desk rebound upon encountering obstruction. This utilizes load-bearing weight sensing for safety protection during desk lifting operations.

[0058] In one embodiment, the first load-bearing sensor 23 is also connected to the lifting drive device 3, and is used to send the load-bearing weight of the desktop to the lifting drive device 3, so that the lifting drive device 3 can set the drive current of the motor controlling the lifting speed of the desktop based on the load-bearing weight of the desktop. In one embodiment, the lifting drive device 3 sets the drive current of the motor controlling the lifting speed of the desktop based on the maximum or average value of the load-bearing weight sensed by the first load-bearing sensor 23.

[0059] In one embodiment, the first load-bearing sensor and the second load-bearing sensor are of the following sensor types: S-type load-bearing sensor, cantilever load-bearing sensor, or spoke-type load-bearing sensor.

[0060] In one embodiment, the display module 25 is also used to display the maximum load-bearing weight of the desktop, and to display an overload warning message when the load-bearing weight of the desktop is greater than a preset weight value.

[0061] One embodiment of this application also discloses an electric height-adjustable desk, including the load-bearing monitoring device described above. The electric height-adjustable desk disclosed in this embodiment includes a desktop, an I-beam support assembly, a lifting drive device, and a hand-held terminal. The load-bearing monitoring device includes a first load-bearing sensor and a display module. The first load-bearing sensor is disposed on the connector between the desktop and the lifting control assembly, and is used to sense the load-bearing weight of the desktop. The display module is used to display the load-bearing weight of the desktop in real time. Because the load-bearing weight of the desktop can be displayed in real time, it ensures that the desktop load-bearing weight will not be overloaded during lifting, greatly improving the safety and reliability of the electric height-adjustable desk.

[0062] Example 3:

[0063] One embodiment of this application also discloses a grating monitoring device for an electric height-adjustable desk, wherein the electric height-adjustable desk includes a desktop, an I-beam support assembly, a height-adjusting drive device, and a handheld terminal. The I-beam support assembly includes a height adjustment component and a fixed support component, which are connected in a sleeved manner. The height adjustment component is fixedly connected to the desktop, and the fixed support component is used to horizontally support the desktop via the height adjustment component. The height-adjusting drive device is disposed on the I-beam support assembly and is used to adjust the sleeve depth between the height adjustment component and the fixed support component by rotating a drive motor, thereby controlling the height adjustment of the electric height-adjustable desk. The handheld terminal is electrically connected to the height-adjusting drive device. The handheld terminal is equipped with a push-button switch, which outputs a height-adjusting electrical signal to the height-adjusting drive device by turning the switch on or off, so that the height-adjusting drive device responds to the height-adjusting electrical signal to raise or lower the desktop.

[0064] Please refer to Figure 6 The diagram below shows the structural block diagram of a grating monitoring device in one embodiment. The grating monitoring device 53 includes a grating infrared through-beam sensor 26 and a display unit 27. The grating infrared through-beam sensor 26 is disposed on the I-beam support assembly and is used to monitor the fitting depth value of the lifting control component and the fixed support component, so as to obtain the height value of the desktop based on the fitting depth value. The display unit 27 is used to display the height value of the desktop.

[0065] Please refer to Figure 7 The diagram illustrates the principle of a grating infrared through-beam sensor in one embodiment. The grating infrared through-beam sensor includes an infrared emitter 31 and a receiver 32. The infrared emitter 31 emits infrared light to form a light curtain, which is received by the receiver 32 located opposite it. The receiver 32 includes a main grating strip 321, an indicator grating 322, and a photoelectric element 323. The photoelectric element 323 of the receiver 32 receives the infrared light and emits an electrical signal.

[0066] In one embodiment, the infrared emitter 31 and the light receiver 32 are respectively fixedly mounted on the lifting control component and the fixed support component to obtain the covering depth value based on the light-receiving position of the light receiver. In another embodiment, when the tabletop of the electric height-adjustable table is raised or lowered, the grating infrared through-beam sensor is further used to obtain the change value of the covering depth value of the lifting control component and the fixed support component based on the change rate of the light-receiving position of the light receiver, and to obtain the instantaneous lifting speed of the tabletop based on the change value of the covering depth value. In another embodiment, the display unit is further used to display the instantaneous lifting speed.

[0067] Please refer to Figure 8 The image shows a cross-sectional view of the sleeve assembly of the I-beam support component in one embodiment. In one embodiment, an infrared emitter 31 is disposed within the hollow cavity of the lifting control component 22, and a light receiver 32 is disposed within the hollow cavity of the fixed support component 22. In one embodiment, the electric lifting table includes at least two I-beam support components, each of which is equipped with a grating infrared through-beam sensor.

[0068] like Figure 6 As shown, in one embodiment, the grating monitoring device 53 is also connected to the lifting drive device 3 to send the real-time height value of the desktop to the lifting drive device 3 for height verification when the lifting drive device 3 performs desktop lifting operation.

[0069] In one embodiment, the tabletop of the electric height-adjustable table is transparent, and the display surface of the display unit is located under the tabletop.

[0070] One embodiment of this application also discloses an electric height-adjustable desk, including the grating monitoring device described above. In one embodiment, the hand control terminal of the electric height-adjustable desk is equipped with a display screen, and the display unit of the grating monitoring device is disposed on the display screen. In one embodiment, the display screen is an LED screen.

[0071] The grating monitoring device disclosed in this application includes a grating infrared through-beam sensor and a display unit. The grating infrared through-beam sensor is disposed on the I-beam support assembly and is used to monitor the fitting depth values ​​of the lifting adjustment component and the fixed support component in the I-beam support assembly to obtain the height value of the desktop based on the fitting depth values. The display unit is used to display the height value of the desktop. Because the desktop height value is obtained by using a grating infrared through-beam sensor to detect the fitting depth values ​​of the lifting adjustment component and the fixed support component, the height adjustment accuracy of the desktop is higher. Furthermore, because the value is displayed in real time through the display unit, the user experience is greatly improved.

[0072] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A load-bearing monitoring device for an electric height-adjustable desk, characterized in that, The electric height-adjustable desk includes a desktop, an I-beam support assembly, a height-adjusting drive device, and a hand control terminal; The I-beam support assembly includes a lifting and adjusting component and a fixed support component, wherein the lifting and adjusting component and the fixed support component are connected by a sleeved connection. The lifting and adjusting component is fixedly connected to the desktop, and the fixed support component is used to horizontally support the desktop through the lifting and adjusting component; The lifting drive device is mounted on the I-beam support assembly. The lifting drive device is used to adjust the fitting depth between the lifting control component and the fixed support component by rotating the drive motor, so as to control the lifting height of the electric lifting table. The handheld terminal is electrically connected to the lifting drive device; the handheld terminal is equipped with a button switch, which outputs a lifting electrical signal to the lifting drive device by turning the button switch on or off, so that the lifting drive device can raise and lower the desktop in response to the lifting electrical signal; The load-bearing monitoring device includes a first load-bearing sensor and a display module; The first load-bearing sensor is installed on the connector between the desktop and the lifting control component, and the first load-bearing sensor is used to sense the load-bearing weight of the desktop. The display module is used to display the value of the load-bearing weight; The load-bearing monitoring device also includes a second load-bearing sensor; the second load-bearing sensor is installed on the ground-contacting table legs of the fixed support member, and one second load-bearing sensor is installed on each ground-contacting table leg; the second load-bearing sensor is used to measure the load-bearing capacity of the ground-contacting table leg and displays it through the display module; The first load-bearing sensor and the second load-bearing sensor are also connected to the lifting drive device; During the lifting control of the electric height-adjustable desk, if the load-bearing weight sensed by at least one of the first load-bearing sensors and at least one of the second load-bearing sensors increases, and the load-bearing weight sensed by the other first load-bearing sensors and the second load-bearing sensors decreases, the lifting drive device determines that the lifting of the electric height-adjustable desk is obstructed, and stops the lifting of the desktop or causes the desktop to rebound upon encountering obstruction. During the lifting control of the electric height-adjustable desk, if the load-bearing weight sensed by at least one of the first load-bearing sensors and at least one of the second load-bearing sensors decreases, and the load-bearing weight sensed by the other first load-bearing sensors and the second load-bearing sensors increases, the lifting drive device determines that the lifting of the electric height-adjustable desk is obstructed, and stops the lifting of the desktop or causes the desktop to rebound upon encountering obstruction.

2. The load-bearing monitoring device as described in claim 1, characterized in that, Each of the connecting parts between the desktop and the lifting and adjusting component is provided with a first load-bearing sensor to measure the load-bearing weight of the desktop at different positions and display it through the display module.

3. The load-bearing monitoring device as described in claim 2, characterized in that, The desktop includes a transparent area, and the display surface of the display module is disposed under the transparent area, with the display surface of the display module being displayed through the transparent area.

4. The load-bearing monitoring device as described in claim 2, characterized in that, The first load-bearing sensor is also connected to the lifting drive device to send the load-bearing weight of the desktop to the lifting drive device, so that the lifting drive device can set the drive current of the motor that controls the lifting speed of the desktop based on the load-bearing weight of the desktop.

5. The load-bearing monitoring device as described in claim 4, characterized in that, The lifting drive device sets the drive current of the motor that controls the lifting speed of the desktop based on the maximum or average value of the load sensed by the first load sensor.

6. The load-bearing monitoring device as described in claim 1, characterized in that, The type of the first load-bearing sensor includes an S-type load-bearing sensor, a cantilever load-bearing sensor, or a spoke-type load-bearing sensor.

7. The load-bearing monitoring device as described in claim 1, characterized in that, The display module is also used to display the maximum load-bearing weight of the desktop, and to display an overload warning message when the load-bearing weight of the desktop exceeds a preset weight value.

8. An electric height-adjustable desk, characterized in that, Includes the load-bearing monitoring device as described in any one of claims 1 to 7.

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