Lifting table capable of realizing self-adaptive adjustment of sitting posture

Abstract

A lifting table with a sitting posture self-adaptive adjustment function relates to the technical field of lifting tables, and adopts the technical scheme that the lifting table comprises a table plate, a lifting device and a detection unit, and the lifting device comprises a supporting seat and a telescopic stand column arranged between the supporting seat and the table plate; the detection unit comprises a central processing unit, and a forearm pressure detection module, a sight distance detection module, a lifting control module, a timing module and a notification module which are electrically connected with the central processing unit. The height of the table board is automatically adjusted through a pressure distribution signal fed back by the forearm pressure detection module and a sight distance signal fed back by the sight distance detection module so as to adapt to individual differences and meet the table top height condition required by a correct sitting posture, and the use duration, the sight distance and the human-table distance can be monitored; a user is reminded to keep a correct sitting posture and rest in time, and diseases such as spinal curvature and chest malformation are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting tables, in particular to a lifting table with self-adaptive adjustment of sitting posture. Background Art

[0002] Primary and secondary school students are in a critical period of growth and development. They sit for a long time while studying. Incorrect sitting posture can cause diseases such as cervical spondylosis, hunchback, myopia, etc., which are harmful to their health. Important factors that induce incorrect sitting posture include inappropriate desk height and fatigue caused by long-term study. The national standard GB / T 3976-2002 "Functional Dimensions of School Desks and Chairs" stipulates the desk height corresponding to different heights. However, due to gender, age and other reasons, the individual development of students varies greatly. The fixed-height desks on the market cannot meet the needs of primary and secondary school students. The bones and muscles of school-age students are in the growth and development stage. Due to insufficient bone and muscle support, long-term study leads to fatigue, which further leads to incorrect sitting posture and causes myopia, spinal curvature, chest deformity and other diseases. Utility Model Content

[0003] In view of the problems in the prior art that the desktop height is not suitable and fatigue caused by long-term study induces incorrect sitting posture, the utility model provides a lifting table with adaptive sitting posture adjustment.

[0004] The utility model provides the following technical solution: a lifting table with self-adaptive sitting posture adjustment, comprising:

[0005] Table top;

[0006] The lifting device comprises a support base and a telescopic column arranged between the support base and the table top;

[0007] The detection unit includes a central processing unit and a forearm pressure detection module, a line of sight detection module, a lifting control module, a timing module and a notification module electrically connected to the central processing unit; the forearm pressure detection module includes two pressure detection devices arranged on the upper surface of the table board facing the user side, which are respectively used to detect the pressure distribution of the forearms of both hands, and the pressure detection device is electrically connected to a pressure analysis module, and the pressure analysis module is electrically connected to the central processing unit; the line of sight detection module includes two distance measuring sensors respectively arranged on both sides of the upper surface of the table board, and the probe direction of the distance measuring sensor is toward the upper center of the side of the table board facing the user; the lifting control module is electrically connected to the telescopic column; the timing module includes an infrared human body sensing module and a timer.

[0008] Preferably, the pressure detection device is a three-dimensional multi-point thin film pressure sensor or a matrix solid pressure sensor.

[0009] Preferably, the two pressure detection devices are symmetrical about the central axis of the table top, and the distance between the two pressure detection devices is less than or equal to 20 cm.

[0010] Preferably, the distance between the distance measuring sensor and the edge of the table top facing the user is 20-30 cm.

[0011] Preferably, a control box is also provided at the center of the bottom of the table top, and the central processing unit, lifting control module, pressure analysis module, and notification module are arranged in the control box. The infrared human body sensing module is arranged on the side of the control box facing the user.

[0012] Preferably, the detection unit further comprises a person-desk distance detection module, and the person-desk distance detection module comprises a distance measuring sensor arranged on a side of the control box facing the user.

[0013] Preferably, the notification module includes a voice chip and a speaker.

[0014] The beneficial effects of the utility model are: the height of the table top is automatically adjusted according to the pressure distribution signal fed back by the forearm pressure detection module and the sight distance signal fed back by the sight distance detection module to adapt to individual differences and meet the table top height conditions required for correct sitting posture, and it can monitor the usage time, sight distance, and person-table distance, and promptly remind the user to maintain a correct sitting posture and rest, and prevent the occurrence of diseases such as spinal curvature and chest deformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of an embodiment of the utility model.

[0016] Figure 2 It is a top view of an embodiment of the utility model.

[0017] Figure 3 This is a schematic diagram of electrical connections of an embodiment of the utility model.

[0018] Figure numerals: 10, table top; 11, control box; 21, support base; 22, telescopic column; 31, pressure detection device; 32, infrared human body sensing module; 33, distance measuring sensor. DETAILED DESCRIPTION

[0019] The following is a more detailed description of the implementation of the utility model in conjunction with the drawings and the figure marks, so that those skilled in the art can implement it after reading this specification. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0020] The utility model provides Figure 1-3The lifting table with self-adaptive sitting posture adjustment shown in the figure comprises a table top 10, a lifting device arranged at the bottom of the table top 10, and a detection unit with a timing function for adjusting the height of the table top and reminding the user to correct the sitting posture.

[0021] The lifting device includes two support bases 21 and a telescopic column 22 disposed between the support bases 21 and the table top 10. The support base 21 is used to stably support the entire lifting table, and the telescopic column 22 can be an electrically controlled telescopic rod driven by a servo motor, which can be extended and retracted along its length direction, thereby driving the table top 10 to rise and fall. The telescopic column 22 can refer to the relevant technology.

[0022] The detection unit includes a central processing unit, and a forearm pressure detection module, a visual distance detection module, a lifting control module, a timing module, a person-table distance detection module and a notification module electrically connected to the central processing unit. The central processing unit can use an AT89C51 chip to meet the system control requirements. The lifting control module can use an L298 driver, which is electrically connected to the motor of the telescopic column 22. The central processing unit accurately controls the rotation direction and number of revolutions of the motor through the lifting control module. The central processing unit and the lifting control module are both installed in the control box 11 at the center of the bottom of the table board.

[0023] The forearm pressure detection module includes two pressure detection devices 31 arranged on the upper surface of the table 10 facing the user, which are respectively used to detect the pressure distribution of the forearms of both hands acting on the pressure detection devices 31, providing a basis for adjusting the height of the table. The pressure detection device 31 is electrically connected to a pressure analysis module, and the pressure analysis module is electrically connected to a central processing unit. Specifically, the pressure detection device 31 can adopt a three-dimensional multi-point thin film pressure sensor or a matrix solid pressure sensor, which has a certain coverage area and can detect the pressure distribution within the coverage area; the pressure analysis module can adopt a control module attached to a commercially available pressure detection device, which is arranged in the control box 11.

[0024] The two pressure detection devices 31 are both arranged on the upper surface of the table 10 facing the user, and are symmetrical about the central axis x1 of the table 10, and the distance L1 between the two pressure detection devices 31 is less than or equal to 20 cm. When the user is facing the central axis of the table, the above arrangement makes the two pressure detection devices 31 correspond to the two arms of the user. When adjusting the height of the table, the user needs to sit upright, and the position corresponds to the center of the table, with both hands hanging naturally, and the two forearms are placed on the two pressure detection devices 31 respectively. In the correct sitting posture, the angle between the forearm and the back arm should be about 90°. If the height of the table is too high, the desktop will put pressure on the elbow and compress the elbow nerves, and the pressure distribution at the rear end of the pressure detection device 31 is more concentrated; if the height of the table is too low, the elbow is higher than the desktop, and the pressure distribution at the front end of the pressure detection device 31 is more concentrated; if the height of the table is appropriate, the pressure distribution on the pressure detection device 31 is more uniform.

[0025] The sight distance detection module includes two distance measuring sensors 33 respectively arranged on the upper surface of the table board 10. The distance measuring sensor 33 can be an infrared distance measuring sensor or an ultrasonic distance measuring sensor. The distance measuring sensor 33 is arranged on both sides of the table board to avoid mutual influence with the normal use space of the table board. The probe direction of the distance measuring sensor 33 is toward the central upper part of the side of the table board facing the user, so that it can detect the user's head and the front of the head to determine the distance between the user's head and the two distance measuring sensors 33. The central processing unit further derives the shortest vertical distance between the user's head and the line x2 connecting the two distance measuring sensors 33 according to this distance through trigonometric functions. The shortest vertical distance can be regarded as the sight distance measurement value. The central processing unit can compare the sight distance measurement value with the preset sight distance standard value. If it is less than or exceeds the standard value, the user is reminded through the notification module. The sight distance standard value is 30~35cm to maintain a correct sitting posture. Preferably, the distance L2 of the distance measuring sensor 33 from the edge of the table board 10 facing the user is 20~30cm.

[0026] The pressure analysis module obtains the pressure distribution signal, the sight distance detection module obtains the sight distance signal, and the central processing unit integrates the pressure distribution signal and the sight distance signal, and controls the lifting and lowering of the table board through the lifting control module. The central processing unit can refer to the following method for processing the pressure distribution signal and the sight distance signal: first, the variance ratio of the measured value and the standard value of the two signals is calculated by the ensemble empirical mode decomposition method (EEMD), so as to characterize the weight of the influence of the two signals on the original incorrect sitting posture; then, the weight is constrained by calculating the Euclidean norm of the measured value and the error value to reduce its error trend, and the error value is the difference between the measured value and the standard value; finally, the corresponding sitting posture influence factor is adjusted by the calculation result of the variance ratio. The sitting posture influence factor changes with the change of the height of the table board 10, and can be adaptively changed to constrain the weight, so that the error value converges quickly to the minimum value, and the table board 10 is adjusted to a suitable height.

[0027] During daily use, the forearm pressure detection module and the lifting module do not work; when adjustment is needed, the central processor can be commanded to enter the adjustment mode through physical buttons or remote control, the forearm pressure detection module can be activated to start working and the lifting module can be controlled for adjustment. The activation method can refer to relevant technologies.

[0028] The timing module is used to count the usage time of the lifting table, including an infrared human body sensing module 32 and a timer. The infrared human body sensing module 32 can be an E18-D80NK module, which is set on the side of the control box 11 facing the user to detect whether there is a user; the timer is a timer attached to the central processing unit. When the infrared human body sensing module 32 detects a user, the timer starts timing and monitors the user's usage time. Once the preset threshold is exceeded, the user is reminded through the notification module; when the user leaves, the timer stops to ensure that the effective usage time reaches the preset threshold. The preset threshold can be 40 minutes.

[0029] The person-table distance detection module includes a distance sensor 33 arranged on the side of the control box 11 facing the user. The distance sensor can be an infrared distance sensor, which is used to detect the straight-line distance between the user's body and the table. The central processor subtracts the installation distance between the distance sensor and the edge of the table from the data fed back by the distance sensor, and then compares it with the preset person-table distance. If it is less than the preset person-table distance, the notification module reminds the user. The preset person-table distance is 10 cm to maintain a correct sitting posture.

[0030] The notification module includes a voice chip and a speaker, both of which are installed in the control box 11. The voice chip can be a KT404A voice chip, which is electrically connected to the central processing unit and stores multiple voice reminder data internally. When the user needs to be reminded, the central processing unit sends a command to the voice chip, selects the corresponding voice reminder data, and plays it through the speaker.

[0031] The above are one or more embodiments of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A lifting table with self-adaptive sitting posture adjustment, characterized in that: include: Table top; The lifting device comprises a support base and a telescopic column arranged between the support base and the table top; The detection unit includes a central processing unit and a forearm pressure detection module, a line of sight detection module, a lifting control module, a timing module and a notification module electrically connected to the central processing unit; the forearm pressure detection module includes two pressure detection devices arranged on the upper surface of the table board facing the user side, which are respectively used to detect the pressure distribution of the forearms of both hands, and the pressure detection device is electrically connected to a pressure analysis module, and the pressure analysis module is electrically connected to the central processing unit; the line of sight detection module includes two distance measuring sensors respectively arranged on both sides of the upper surface of the table board, and the probe direction of the distance measuring sensor is toward the upper center of the side of the table board facing the user; the lifting control module is electrically connected to the telescopic column; the timing module includes an infrared human body sensing module and a timer.

2. The self-adjustable lifting table according to claim 1, characterized in that: The pressure detection device is a three-dimensional multi-point thin film pressure sensor or a matrix solid pressure sensor.

3. The self-adjustable lifting table according to claim 1, characterized in that: The two pressure detection devices are symmetrical about the central axis of the table top, and the distance between the two pressure detection devices is less than or equal to 20 cm.

4. The self-adjustable lifting table according to claim 1, characterized in that: The distance between the distance measuring sensor and the edge of the table top facing the user is 20-30 cm.

5. The self-adaptive lifting table according to claim 1, characterized in that: A control box is also provided at the center of the bottom of the table top, and the central processing unit, lifting control module, notification module, and pressure analysis module are arranged in the control box. The infrared human body sensing module is arranged on the side of the control box facing the user.

6. The self-adaptive lifting table according to claim 5, characterized in that: The detection unit further includes a person-table distance detection module, and the person-table distance detection module includes a distance measuring sensor arranged on a side of the control box facing the user.

7. The self-adjustable lifting table according to claim 1, characterized in that: The notification module includes a voice chip and a speaker.

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