Sitting posture monitoring seat

Abstract

The invention relates to a sitting posture monitoring seat which comprises a cushion, the cushion comprises a surface layer and a middle supporting layer, and the surface layer and the middle supporting layer are sequentially stacked and assembled from top to bottom; the middle supporting layer is divided into a plurality of supporting sub-blocks, and the supporting sub-blocks are used for correspondingly supporting a first part and a second part of the lower limbs of a user respectively; and the plurality of pressure sensors are arranged on the middle supporting layer, and each pressure sensor is connected with the corresponding supporting sub-block. On one hand, different pressure sensors connected with the supporting blocks are decoupled from each other through the block type cushion structure, so that the pressure sensors can extract more signal characteristics; according to different abnormal sitting postures of a user, different pressure sensors can monitor pressure data of different parts of thighs and buttocks in a targeted mode, different abnormal sitting postures can be identified conveniently, and the accuracy of abnormal sitting posture identification is improved.

Description

Technical Field

[0001] This application relates to the technical field of seats, and particularly to a sitting posture monitoring seat. Background Art

[0002] In daily work, study, and life scenarios, a seat is an item that accompanies people for a long time. When people sit on a seat with an improper sitting posture, the abnormal sitting posture for a long time will cause the spine (including the cervical, thoracic, lumbar, sacral, and coccygeal vertebrae) to be overloaded, and then cause symptoms such as muscle soreness, blood flow compensation, and nerve numbness, and even cause pathological bone structure changes. Therefore, it is very necessary to timely monitor abnormal sitting postures and remind people to correct their sitting postures.

[0003] Currently, the technical means applied to sitting posture monitoring mainly include the following several types: The first is computer vision detection technology based on optical sensors to monitor and analyze the human sitting posture; the second is a sitting posture monitoring means with sensors such as accelerometers, multi-axis force sensors, or gyroscopes arranged on wearable devices for the human body; the third is to arrange thin-film pressure sensors on the seat cushion or distance sensors on the backrest to test the sensor response under different sitting postures. However, in the first technical means, the optical sensor is easily interfered by environmental light and environmental objects, resulting in low monitoring accuracy, and the need to turn on the camera also has a security risk of leaking user privacy; in the second technical means, multiple sensors need to be arranged, the monitoring cost is high, and the operation of wearing and taking off the wearable device is relatively cumbersome and inconvenient, affecting the user experience; in the third technical means, the thin-film pressure sensor will have creep, resulting in inaccurate readings and affecting the accuracy of sitting posture recognition, and the distance sensor is also easily blocked accidentally, affecting the detection accuracy. Summary of the Invention

[0004] Based on this, it is necessary to provide a sitting posture monitoring seat to solve the problems of poor sitting posture recognition ability, low accuracy of sitting posture monitoring and judgment, and inconvenient operation and use, which affect the experience.

[0005] This application provides a sitting posture monitoring seat, which includes:

[0006] A seat cushion, the seat cushion includes a surface layer and an intermediate support layer, and the surface layer and the intermediate support layer are stacked and assembled in sequence from top to bottom; the intermediate support layer is divided into a plurality of support sub-blocks, and the plurality of support sub-blocks are used to respectively support the first part and the second part of the lower limbs of the user; and,

[0007] A plurality of pressure sensors, the plurality of pressure sensors are installed on the intermediate support layer, and each pressure sensor is connected to at least one of the support sub-blocks.

[0008] In the sitting posture monitoring seat of the above solution, the user uses the sitting posture monitoring seat by sitting on the seat cushion. Since the seat cushion is composed of an upper and lower stacked surface layer and an intermediate support layer, it can take into account the comfort and support stability after sitting. Further, by dividing the intermediate support layer into multiple support blocks, and different support blocks respectively correspond to supporting the first part and the second part of the user's lower limbs when sitting, and at the same time, a plurality of pressure sensors are installed on the support layer, and each pressure sensor is respectively connected to the corresponding different support blocks. On the one hand, the segmented seat cushion structure enables the different pressure sensors connected to each support block to be decoupled from each other, so that the pressure sensors can extract more signal features. On the other hand, according to different abnormal sitting postures of the user, different pressure sensors can specifically monitor the pressure data of different parts of the first part and the second part of the lower limbs, which is convenient for identifying different abnormal sitting postures and improving the accuracy of abnormal sitting posture recognition. Moreover, the division of multiple support blocks extracts the key areas of abnormal sitting postures, maximizing the pressure difference of different abnormal sitting postures from a structural perspective. And compared with the prior art method of monitoring indirect physical quantities, this solution directly measures the direct physical quantity of pressure through pressure sensors, replacing indirect physical quantities such as temperature, distance, and acceleration. The direct physical quantity of pressure is directly related to the force on the human spine, thereby further improving the reliability of sitting posture judgment.

[0009] The technical solution of the present application will be further described below:

[0010] In one embodiment, the multiple support blocks include a first middle column block and a second middle column block, and the first middle column block and the second middle column block are symmetrically distributed.

[0011] In one embodiment, the first part of the user's lower limbs includes the front side of the thigh and the back side of the thigh, and the second part of the user's lower limbs includes the buttocks; the first middle column block includes a first right side block, a second right side block, and a third right side block, and the first right side block, the second right side block, and the third right side block are arranged in sequence in the front-to-back direction of the sitting posture monitoring seat. Among them, the first right side block corresponds to supporting the front side of the right thigh of the user, the second right side block corresponds to supporting the back side of the right thigh of the user, and the third right side block corresponds to supporting the right side of the buttocks of the user.

[0012] In one embodiment, the second middle column block includes a first left block, a second left block, and a third left block. The first left block, the second left block, and the third left block are arranged in sequence in the front-to-back direction of the sitting posture monitoring seat. Among them, the first left block corresponds to supporting the front side of the user's left thigh, the second left block corresponds to supporting the back side of the user's left thigh, and the third left block corresponds to supporting the left side of the user's buttocks.

[0013] In one embodiment, the plurality of support blocks further include a first side block and a second side block. The first side block is connected to a side of the first middle column block facing away from the second middle column block, and the second side block is connected to a side of the second middle column block facing away from the first middle column block.

[0014] In one embodiment, both the first side block and the second side block include a plurality of split blocks, and the plurality of split blocks are arranged side by side in the front-to-back direction of the sitting posture monitoring seat.

[0015] In one embodiment, the ratio of the partition lengths of the first right block, the second right block, and the third right block in the front-to-back direction of the sitting posture monitoring seat is 1:4:3;

[0016] The ratio of the partition lengths of the first left block, the second left block, and the third left block in the front-to-back direction of the sitting posture monitoring seat is 1:4:3.

[0017] In one embodiment, the surface layer includes a fabric layer and a soft cushion layer. The fabric layer wraps around the outside of the soft cushion layer and is fixedly connected to the middle support layer;

[0018] Among them, both the soft cushion layer and the middle support layer are provided with inwardly concave depression structures for adapting to the contour of the user's buttocks.

[0019] In one embodiment, the seat cushion further includes a carrier layer, and the carrier layer is arranged below the middle support layer; the carrier layer includes a structural support plate and a bottom shell. The structural support plate is arranged on the bottom shell, and a control circuit board is installed on the bottom shell. The control circuit board is electrically connected to the pressure sensor;

[0020] The structural support plate is provided with a plurality of mounting holes, and each support block is correspondingly arranged with at least one mounting hole. The pressure sensor is installed in the mounting hole and abuts against the support block.

[0021] In one embodiment, the pressure sensor is integrally detachably inserted into the mounting hole.

[0022] In one embodiment, the pressure sensor is a strain-type pressure sensor, and the strain-type pressure sensor includes an elastic component, a strain gauge, and a fixing component. The elastic component is movably installed on the hole wall of the mounting hole. The strain gauge is installed on the elastic component. The fixing component passes through the elastic component and is fixedly connected to the corresponding support sub-block.

[0023] In one embodiment, the elastic component includes a main body portion and a loading portion connected to each other. The main body portion is fixedly connected to the hole wall of the mounting hole through two supporting feet. A first avoidance gap is formed between the outer contour of the main body portion facing away from the loading portion and the hole wall of the mounting hole. A second avoidance gap is formed between the outer contour of the loading portion facing away from the main body portion and the hole wall of the mounting hole. The strain gauge is installed on the main body portion. The fixing component passes through the loading portion.

[0024] In one embodiment, two columns of pressure sensors are respectively provided at positions corresponding to the first middle column sub-block and the second middle column sub-block on the carrier layer. The pressure sensors in the two columns of pressure sensors are arranged in a staggered manner in the front-to-back direction of the sitting posture monitoring seat.

[0025] In one embodiment, the sitting posture monitoring seat further includes a backrest, a lumbar cushion, a chassis, and a back sensor. The seat cushion is arranged above the chassis. The backrest is arranged at the rear side of the chassis. The lumbar cushion is arranged on the backrest. The back sensor is arranged on the lumbar cushion and / or the backrest;

[0026] The carrier layer includes a structural support plate and a bottom shell. The structural support plate is arranged on the bottom shell, and the structural support plate is connected to the chassis. The back sensor is electrically connected to a control circuit board installed on the bottom shell.

[0027] In one embodiment, the sitting posture monitoring seat further includes a gas spring, a pedal, a foot sensor, a bracket, and a roller. The gas spring is connected between the chassis and the pedal. The foot sensor is detachably installed on the pedal and is electrically connected to the control circuit board. The bracket is connected to the bottom of the pedal. The roller is rotatably arranged on the bracket.

[0028] In one embodiment, the sitting posture monitoring seat further includes a data processing module, a data storage module, and a data transmission module. The data processing module, the data storage module, and the data transmission module are respectively installed on the chassis or the pedal. The pressure sensor, the back sensor, and the foot sensor are respectively electrically connected to the data processing module. The data processing module is electrically connected to the data storage module, and the data storage module is electrically connected to the data transmission module. The data transmission module is used for data transmission and interaction with the APP in the external terminal.

[0029] In one embodiment, the sitting posture monitoring seat further includes a reminder module. The reminder module is electrically connected to the pressure sensor, the back sensor, and the foot sensor, and is used for giving a sound or vibration reminder after an abnormal sitting posture is recognized. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments and descriptions thereof of this application are used to explain this application and do not constitute an improper limitation to this application.

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of the sitting posture monitoring seat according to an embodiment of this application.

[0033] Figure 2 Figure 1 Side view structure diagram.

[0034] Figure 3 It is a partial exploded structure diagram of the seat cushion of an embodiment.

[0035] Figure 4 It is a schematic structural diagram of the middle support layer.

[0036] Figure 5 For Figure 4 Bottom view structure diagram.

[0037] Figure 6 It is an assembly structure diagram of the structural support plate and the middle support layer.

[0038] Figure 7 For Figure 6 Partial enlarged structure diagram at position A in

[0039] Figure 8 It is a schematic structural diagram of the bottom shell.

[0040] Explanation of the reference numerals in the drawings:

[0041] 100, sitting posture monitoring seat; 10, seat cushion; 11, surface layer; 111, fabric layer; 112, soft cushion layer; 12, intermediate support layer; 121, support blocks; 121a, first right-side block; 121b, second right-side block; 121c, third right-side block; 121d, first left-side block; 121e, second left-side block; 121f, third left-side block; 121g, first side-edge block; 121h, second side-edge block; 122, threaded posts; 13, carrier layer; 131, structural support board; 131a, mounting holes; 132, bottom shell; 20, pressure sensor; 21, elastic member; 211, main body part; 212, loading part; 22, strain gauge; 23, fixing member; 24, first avoidance gap; 25, second avoidance gap; 30, control circuit board; 40, backrest; 50, lumbar pad; 60, chassis; 70, back sensor; 80, gas spring; 90, pedal; 90a, foot pedal sensor; 90b, bracket; 90c, roller; 90d, headrest. Detailed implementation manners

[0042] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description for a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0043] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0044] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In this application, unless otherwise clearly specified and limited, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In this application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0048] Refer to Figure 1 and Figure 2 , a sitting posture monitoring seat 100 shown in an embodiment of this application, which is specifically a movable or fixed backrest chair and is applicable to occasions such as office work and study.

[0049] Exemplarily, the sitting posture monitoring seat 100 includes a headrest 90d, a backrest 40, a lumbar cushion 50, a seat cushion 10, a chassis 60, a back sensor 70, a gas spring 80, a pedal 90, a footrest sensor 90a, a bracket 90b, and a roller 90c.

[0050] The headrest 90d is installed at the upper end of the backrest 40. The backrest 40 is disposed at the rear side of the chassis 60. The lumbar cushion 50 is disposed on the backrest 40, so as to conveniently support the back and waist of the user after sitting down, thereby improving the comfort of the sitting posture. The seat cushion 10 is stacked above the chassis 60. The chassis 60 realizes the longitudinal loading and support of the seat cushion 10, and the seat cushion 10 is used to support the user when sitting down.

[0051] The gas spring 80 is connected between the chassis 60 and the pedal 90. It can be understood that the gas spring 80 is a telescopic strut structure, which can flexibly adjust the height of the seat cushion 10, so as to be used by users of different heights or meet the needs of different sitting posture heights.

[0052] In addition, the bracket 90b is connected to the bottom of the pedal 90, and the roller 90c is rotatably disposed on the bracket 90b. Specifically, the bracket 90b has a plurality of leg structures distributed in a scattered manner, and a roller 90c is installed at the end of each leg. The plurality of rollers 90c contact the ground simultaneously. On the one hand, it forms a multi-point dispersed support with the ground, which is beneficial to improving the stability of the sitting posture monitoring seat 100. On the other hand, it also helps to enhance the moving ability of the sitting posture monitoring seat 100.

[0053] Please continue to refer to Figure 2 and Figure 3 , the carrier layer 13 includes a structural support plate 131 and a bottom shell 132. The structural support plate 131 is disposed on the bottom shell 132, and the structural support plate 131 is connected to the chassis 60. The back sensor 70 is electrically connected to the control circuit board 30 installed on the bottom shell 132. The back sensor 70 is disposed on the lumbar cushion 50 and / or the backrest 40. The footrest sensor 90a is detachably installed on the pedal 90 and is electrically connected to the control circuit board 30.

[0054] The added back sensor 70 and footrest sensor 90a can be used to monitor the pressure on the back and feet of the user, so as to comprehensively and accurately identify the abnormal sitting posture types of the user. For example, when the user sits down but bends forward at the upper body, at this time the back sensor 70 cannot detect the existence of back pressure, and it can be identified and determined that the current user is not normally relying on the backrest 40; when the user sits down and crosses their legs, one of the footrest sensors 90a cannot detect the foot pressure (normally two footrest sensors 90a are installed on the pedal 90, which cooperate with the left and right feet of the user respectively), and it can be identified and determined that the feet of the current user are not normally placed on the pedal 90.

[0055] For example, by monitoring the relationship between the pressure distribution, the change in the center of gravity, and the total pressure, it is possible to identify whether the user has a hunchback. (Identifying whether the user has a hunchback is an important function of this product. It should be noted that the back sensor 70 / the foot pedal sensor 90a / the pressure sensor 20 are not simply distinguished by whether they are set or not, but calculate and classify the readings, and this ability to obtain accurate readings is not available in the flexible sensor solution.)

[0056] Optionally, the back sensor 70 can be any one of a pressure sensor, an infrared sensor, an ultrasonic sensor, etc.

[0057] Please continue to refer to Figures 3 to 5 , furthermore, in this embodiment, the seat cushion 10 includes a surface layer 11, an intermediate support layer 12, and a carrier layer 13. The surface layer 11, the intermediate support layer 12, and the carrier layer 13 are stacked and assembled in sequence from top to bottom; the intermediate support layer 12 is divided into a plurality of support blocks 121, and the plurality of support blocks 121 are used to respectively support the first part and the second part of the user's lower limbs. Among them, the first part of the user's lower limbs includes the front side and the back side of the thighs, and the second part of the user's lower limbs includes the buttocks.

[0058] It should be noted that in this solution, the intermediate support layer 12 and the carrier layer 13 can be an integral structure or a split structure, and can be specifically selected according to actual needs.

[0059] In addition, the sitting posture monitoring seat 100 further includes a plurality of pressure sensors 20. The plurality of pressure sensors 20 are installed on the intermediate support layer 12, and each pressure sensor 20 is connected to at least one support block 121.

[0060] In summary, implementing the technical solution of this embodiment will have the following beneficial effects: In the sitting posture monitoring seat 100 of the above solution, the user uses the sitting posture monitoring seat 100 by sitting on the seat cushion 10. Since the seat cushion 10 is composed of a surface layer 11, an intermediate support layer 12, and a carrier layer 13 that are stacked up and down, it can take into account the comfort and support stability after sitting, and improve the sitting experience; further, by dividing the intermediate support layer 12 into multiple support blocks 121, and different support blocks 121 respectively correspond to supporting the front side of the thigh, the back side of the thigh, and the buttocks of the user when sitting in a correct posture. At the same time, a plurality of pressure sensors 20 are installed on the support layer, and each pressure sensor 20 is respectively connected to a corresponding different support block 121. On the one hand, the segmented seat cushion 10 enables the different pressure sensors 20 connected to each support block 121 to be decoupled from each other, so that the pressure sensors 20 can extract more signal features. On the other hand, according to different abnormal sitting postures of the user, different pressure sensors 20 can specifically monitor the pressure data of different parts of the thigh and buttocks, which is convenient for identifying different abnormal sitting postures and improving the accuracy of abnormal sitting posture recognition. Moreover, the division of the multiple support blocks 121 extracts the key areas of abnormal sitting postures, maximizing the pressure difference of different abnormal sitting postures from a structural perspective. Compared with the prior art method of monitoring indirect physical quantities, this solution directly measures the direct physical quantity of pressure through the pressure sensors 20, replacing indirect physical quantities such as temperature, distance, and acceleration. The direct physical quantity of pressure is directly related to the force on the human spine, thereby further improving the reliability of sitting posture judgment.

[0061] Based on the above embodiment, the multiple support blocks 121 include a first middle column block and a second middle column block, and the first middle column block and the second middle column block are symmetrically distributed. This makes the structural design of the intermediate support layer 12 more regular, convenient for processing and forming, and the symmetrically distributed first middle column block and second middle column block are in more balanced contact with the user's legs and buttocks, which can eliminate the deviation of the monitoring results caused by structural inadaptation.

[0062] Please continue to refer to Figure 4 and Figure 5, more specifically, the first middle column block includes a first right-side block 121a, a second right-side block 121b, and a third right-side block 121c. The first right-side block 121a, the second right-side block 121b, and the third right-side block 121c are arranged in sequence in the front-to-back direction of the sitting posture monitoring seat 100. Among them, the first right-side block 121a corresponds to supporting the front side of the user's right thigh, the second right-side block 121b corresponds to supporting the rear side of the user's right thigh, and the third right-side block 121c corresponds to supporting the right side of the user's buttocks; the second middle column block includes a first left-side block 121d, a second left-side block 121e, and a third left-side block 121f. The first left-side block 121d, the second left-side block 121e, and the third left-side block 121f are arranged in sequence in the front-to-back direction of the sitting posture monitoring seat 100. Among them, the first left-side block 121d corresponds to supporting the front side of the user's left thigh, the second left-side block 121e corresponds to supporting the rear side of the user's left thigh, and the third left-side block 121f corresponds to supporting the left side of the user's buttocks.

[0063] Each of the first right-side block 121a, the second right-side block 121b, the third right-side block 121c, the first left-side block 121d, the second left-side block 121e, and the third left-side block 121f is correspondingly connected to an independent pressure sensor 20. Therefore, when the user sits on the cushion 10 in different types of abnormal sitting postures, there is always a pressure sensor 20 that can accurately monitor the pressure exerted on different parts of the user's legs and buttocks, so as to accurately identify the type of the current user's abnormal sitting posture and improve the accuracy and completeness of sitting posture identification.

[0064] Furthermore, the multiple support blocks 121 further include a first side block 121g and a second side block 121h. The first side block 121g is connected to one side of the first middle column block facing away from the second middle column block, and the second side block 121h is connected to one side of the second middle column block facing away from the first middle column block.

[0065] The first side block 121g and the second side block 121h can further wrap and laterally support the outer sides of the user's legs and the outer sides of the buttocks. On the one hand, it improves the comfort of the sitting posture, and on the other hand, it can also more accurately monitor and identify the sitting posture state that is skewed to one side of the cushion 10.

[0066] It should be noted that the first side block 121g and the second side block 121h can be an integral structure or can include multiple split blocks. The multiple split blocks are connected to each other and are arranged side by side in the front-to-back direction of the sitting posture monitoring seat 100.

[0067] The length of the first side partition block 121g is not less than the sum of the lengths of the first right partition block 121a, the second right partition block 121b, and the third right partition block 121c (the length of the sitting posture monitoring seat 100 in the front-to-back direction). The length of the second side partition block 121h is not less than the sum of the lengths of the first left partition block 121d, the second left partition block 121e, and the third left partition block 121f (the length of the sitting posture monitoring seat 100 in the front-to-back direction). In this way, the structure of the middle support layer 12 can be kept square and regular, ensuring the wrapping and supporting effects on the user's legs and buttocks. Moreover, more pressure sensors 20 with different positions can be correspondingly configured for the first side partition block 121g and the second side partition block 121h, so that different pressure values can be monitored more accurately, and thus the abnormal sitting posture types of the current user can be identified more precisely.

[0068] It should be noted that the middle support layer 12 corresponds to the area with the largest pressure change during abnormal sitting postures. Through a large number of tests, the middle support layer 12 of this application is divided into 8 key partition blocks (zones), maximizing the difference in the readings of the pressure sensors 20 in different postures, enabling the algorithm to easily identify.

[0069] In some embodiments, the ratio of the partition lengths of the first right partition block 121a, the second right partition block 121b, and the third right partition block 121c in the front-to-back direction of the sitting posture monitoring seat 100 is 1:4:3; the ratio of the partition lengths of the first left partition block 121d, the second left partition block 121e, and the third left partition block 121f in the front-to-back direction of the sitting posture monitoring seat 100 is 1:4:3.

[0070] Generally speaking, the key areas of pressure change corresponding to different postures of people with different body types are slightly different. Adopting the above-mentioned partition length design can better take into account the recognition needs of various abnormal sitting postures. Of course, the specific block size ratio and the segmentation curve between the blocks can be obtained through a large number of tests and mathematical calculations, not limited to the size distribution ratio and linear segmentation shown in this solution.

[0071] Please continue to refer to Figure 3 In addition, on the basis of any of the above embodiments, the surface layer 11 includes a fabric layer 111 and a soft cushion layer 112. The fabric layer 111 wraps around the outside of the soft cushion layer 112 and is fixedly connected to the middle support layer 12. Among them, both the soft cushion layer 112 and the middle support layer 12 are provided with inwardly concave forming recessed structures for adapting to the contour of the user's buttocks. In this way, the wrapping of the soft cushion layer 112 and the middle support layer 12 on the user's buttocks can be improved, enhancing the sitting posture comfort.

[0072] Optionally, the fabric layer 111 is designed to be detachably connected to the intermediate support layer 12, and the connection method can be any one of a zipper, adhesion, snap, magnetic attraction, etc., or a combination of at least two or more of them, so as to facilitate the disassembly, cleaning or replacement of the fabric layer 111. For example, the fabric layer 111 can be a cloth cover, a leather cover, etc.

[0073] The soft cushion layer 112 can be any one of a sponge layer, a latex layer, etc., or a combination of at least two or more of them.

[0074] In still other embodiments, the carrier layer 13 includes a structural support plate 131 and a bottom case 132. The structural support plate 131 is disposed on the bottom case 132, and a control circuit board 30 is installed on the bottom case 132. The control circuit board 30 is electrically connected to the pressure sensor 20. The bottom case 132 is used to load and support the structural support plate 131 and the control circuit board 30, and the structural support plate 131 is used to load and support the intermediate support layer 12 and the surface layer 11, so that the overall structure of the seat cushion 10 is simple and the connection reliability of each component is high.

[0075] Please continue to refer to Figure 6 and Figure 8 , the structural support plate 131 is provided with a plurality of mounting holes 131a, each support block 121 is correspondingly arranged with at least one mounting hole 131a, and the pressure sensor 20 is installed in the mounting hole 131a and abuts against the support block 121. When the user sits on the seat cushion 10, pressure will be applied to the pressure sensor 20 passing through the mounting hole 131a (the pressure is converted from gravity), and the pressure sensor 20 can obtain the monitoring data and transmit it to the control circuit board 30, and the current sitting posture type of the user can be obtained through the analysis and calculation of the control circuit board 30.

[0076] Optionally, the arrangement method of the mounting holes 131a on the structural support plate 131 can also be one arranged in the center, or one arranged on each side, or one arranged at each of the four top corners, etc., and specific selection can be made according to actual needs.

[0077] A threaded post 122 protrudes from the back of the intermediate support layer 12 for threaded assembly with the bottom case 132 and the chassis 60 respectively.

[0078] Specifically, the pressure sensor 20 is electrically connected to the control circuit board 30. One implementation method is that the pressure sensor 20 is connected to the respective corresponding FPC through a 6-pin snap, and then multiple FPCs can be connected to the control circuit board 30 one by one or in groups.

[0079] The control circuit board 30 includes an MCU (Micro Control Unit), an ADC (Analog-to-Digital Converter), a storage unit, an amplifier, a filter, a Wi-Fi or Bluetooth communication module, an I / O port, a battery, and a charging circuit, etc. In a feasible embodiment, the amplification factor of the amplifier is 128 times; the analog-to-digital conversion module selects an independent ADC module with 24 bits and a sampling rate of 80 Hz. The basic requirements for the MCU are that the main frequency is not less than 80 MHz and the RAM is not less than 128 KB. It should be noted that for pressure sensors 20 at different positions or of different types, their amplification factors, filter circuits, or the parameters of the ADC can be optimized and designed according to requirements respectively.

[0080] In actual use, the analog signals collected by the pressure sensors 20 at various positions, after being amplified, filtered, segmented, etc., become signals used for sitting posture recognition. Here, the value before being pressed is taken as the baseline, and the change amount of the sensor reading after being pressed is taken.

[0081] The baseline can be calibrated during use. When calibrating, calibration signals need to be collected for a period of time, and then activity detection, liveness detection, consistency detection, etc. are carried out to determine whether to calibrate the baseline with the time-domain mean value of the calibration signal. When recognizing the sitting posture, the signals of each channel can be directly used to judge the sitting posture, or the values normalized with the weight can be used for judgment. Similarly, the signals of the pressure sensors 20 in the current sitting posture can be used for judgment, or the difference obtained by subtracting the reading of the calibrated normal sitting posture template from the current reading can be calculated. Similarly, time-domain signals can be used, or frequency-domain signals after fast Fourier transform or wavelet transform can be used for judgment.

[0082] The specific types of sitting postures can be recognized by algorithm calculation. The algorithm can detect all sitting postures deviating from the upright sitting, or several specified abnormal sitting postures.

[0083] A feasible example is to recognize the sitting posture according to the traditional threshold algorithm. For example, according to the combined operation of several channels and some preset judgment bases and thresholds, the recognition result is obtained. For example, the sum of the values of the pressure sensors 20 in the left 2 channels minus the sum of the values of the pressure sensors 20 in the right 2 channels to get the difference in left and right pressures. If this difference is greater than the preset value F10, the user's sitting posture is left-right deviation. The channel signals here can be the signals after the above normalization and difference processing.

[0084] Another feasible example is to identify sitting postures according to machine learning algorithms. For example, algorithms such as support vector machines, random forests, and deep learning can be used to collect labeled data, and an abnormal sitting posture detection model can be trained. In particular, deep learning models can automatically extract features from data. Through data accumulation and iterative optimization, the deep learning method can reach a higher performance ceiling. A possible deep learning model: first use a convolutional neural network to extract the short-term fluctuation features of the signal, then use a recurrent neural network to extract the long-term fluctuation features of the signal, and finally use a Transformer to integrate the information of different sensors and output the recognition result.

[0085] It should be emphasized that the algorithm is not limited to a specific solution and can be a combination of different solutions. For example, some postures are detected using a threshold algorithm, and other postures are detected using a deep learning algorithm. Moreover, the features refined by the threshold algorithm can also be applied in the deep learning model.

[0086] In this application, there can be various installation methods for the pressure sensor 20. For example, in some embodiments, the pressure sensor 20 can be designed as a modular structure, so that the entire pressure sensor 20 can be detachably inserted into the mounting hole 131a. The installation method is simple, and the installation and disassembly are convenient and labor-saving. Specifically, the pressure sensor 20 can be fixed in the mounting hole 131a by interference fit, bonding, etc.

[0087] Please continue to refer to Figure 6 and Figure 7 , or, in some other embodiments, the pressure sensor 20 is a strain-type pressure sensor 20. The strain-type pressure sensor 20 includes an elastic member 21, a strain gauge 22, and a fixing member 23. The elastic member 21 is movably installed on the hole wall of the mounting hole 131a, the strain gauge 22 is installed on the elastic member 21, and the fixing member 23 passes through the elastic member 21 and is fixedly connected to the corresponding support sub-block 121.

[0088] The fixing member 23 passes through the elastic member 21 and is connected and fixed to the support sub-block 121. Thus, under the condition of assembling the middle support layer 12 and the carrier layer 13, each support sub-block 121 is connected to the corresponding pressure sensor 20. When the support sub-block 121 bears the pressure from the user, it can be quickly detected by the pressure sensor 20, so as to identify abnormal sitting postures.

[0089] For example, the fixing member can be a threaded member, specifically a bolt, a screw, etc.

[0090] Specifically, in the above embodiments, the elastic member 21 includes a connected main body portion 211 and a loading portion 212. The main body portion 211 is fixedly connected to the hole wall of the mounting hole 131a through two legs. A first avoidance gap 24 is formed between the outer contour of the main body portion 211 facing away from the loading portion 212 and the hole wall of the mounting hole 131a. A second avoidance gap 25 is formed between the outer contour of the loading portion 212 facing away from the main body portion 211 and the hole wall of the mounting hole 131a. The strain gauge 22 is installed on the main body portion 211, and the fixing member 23 passes through the loading portion 212.

[0091] The first avoidance gap 24 and the second avoidance gap 25 are arranged oppositely, and the fixing member 23 is located between the first avoidance gap 24 and the second avoidance gap 25. When the support sub-block 121 applies pressure to the fixing member 23, the pressure is transmitted along the axial direction of the fixing member 23 to the main body portion 211 and the loading portion 212, so that the main body portion 211 and the loading portion 212 undergo relatively balanced deformation, and the deformation can be sensed by the strain gauge 22 to convert the strain (such as tension or compression) into a resistance change, and then output a voltage signal to the control circuit board 30, thereby forming a signal feedback.

[0092] The strain gauges 22 can be selected to form a quarter-bridge, half-bridge or full-bridge circuit. A full-bridge means that four strain gauges 22 are connected to form a Wheatstone bridge. By providing an excitation voltage to the bridge circuit, a voltage signal can be output. The bridge circuit subtracts the strains pairwise electrically, making the output value more stable. When a force, moment or torque is applied, two of the strain gauges 22 in the bridge circuit are stretched and the other two are compressed. By arranging the strain gauges 22 symmetrically, the sensor can be made to respond only to one type of stress. In this application, the sensor can be made to respond only to the pressure in the vertical direction.

[0093] Of course, in other embodiments, the pressure sensor 20 can also be piezoelectric, piezoresistive, etc. For example, when a piezoelectric pressure sensor is used, the piezoelectric block can be bonded to the surface of the support column so as to abut against the support sub-block 121 to sense the pressure value.

[0094] Further, two columns of pressure sensors 20 are respectively provided on the carrier layer 13 corresponding to the first middle column sub-block and the second middle column sub-block. The pressure sensors 20 in the two columns of pressure sensors 20 are arranged in a staggered manner in the front-to-back direction of the sitting posture monitoring seat 100. For example, in this embodiment, each column of pressure sensors 20 includes three pressure sensors 20, and a total of twelve pressure sensors 20 in four columns are arranged in a front-to-back staggered manner, so that the distribution of the pressure sensors 20 is more balanced, the pressure measurement points are more dispersed, and it is more conducive to monitoring the pressure values in various different abnormal sitting postures, achieving the effect of monitoring and identifying more sitting postures and improving the working ability of the sitting posture monitoring seat 100. Similarly, one / two / four full-bridge / half-bridge sensors can also be used under each support sub-block 121 and freely combined.

[0095] In addition, in some other embodiments, the sitting posture monitoring seat 100 further includes a data processing module, a data storage module, and a data transmission module. The data processing module, the data storage module, and the data transmission module are respectively installed on the chassis 60 or the pedal 90. The pressure sensor 20, the back sensor 70, and the foot pedal sensor 90a are respectively electrically connected to the data processing module. The data processing module is electrically connected to the data storage module, and the data storage module is electrically connected to the data transmission module. The data transmission module is used for data transmission and interaction with the APP in the external terminal.

[0096] The data transmission can be implemented by wired or wireless transmission methods.

[0097] The provided data storage module enables the sitting posture monitoring seat 100 to have an offline function, that is, when there is no connection to devices such as mobile phones or learning machines, it can still collect data, perform analysis, and store the data in the data storage module, or provide real-time sound / vibration feedback, and then synchronize the data to the mobile phone or cloud through the mobile phone or other devices after connecting. The offline data may need to be compressed for storage, and the data processing module can compress and encrypt the data. In addition, the sitting posture monitoring seat further includes a reminder module, which is electrically connected to the pressure sensor, the back sensor, and the foot pedal sensor. The reminder module is used to give a sound or vibration prompt after identifying an abnormal sitting posture, so as to better remind the user to correct the sitting posture.

[0098] The user can read the data of the sitting posture monitoring seat 100 through the APP software on a smart phone or a tablet computer. When the APP is connected to the sitting posture monitoring seat 100 via WIFI or Bluetooth, the test data will be encrypted and transmitted to the APP side to update the data. The pressure data of each pressure sensor 20, the user's sitting posture, etc. can be dynamically displayed on the APP. It can also display the sitting posture statistical results within a certain time range, such as: the duration of normal sitting postures and abnormal sitting postures, the frequently occurring abnormal sitting postures, and improvement suggestions, etc.

[0099] In addition, the sitting posture monitoring seat 100 can also transmit real-time data of the user's weight, center of gravity, acceleration, etc. to the host computer to achieve human-machine interaction. For example, simulating skiing movements on the sitting posture monitoring seat 100, the left and right movements can be simulated by body swaying, and the jumping can be simulated by shifting the center of gravity upward. In addition to using accelerometers and cameras, the human body characteristics can be input into the host computer in a pressure manner, and the user does not need to wear additional products such as bracelets or head-mounted displays.

[0100] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0101] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A sitting posture monitoring chair, It is characterized in that include: A seat cushion, the seat cushion comprising a surface layer and an intermediate support layer, the surface layer and the intermediate support layer being stacked and assembled in sequence from top to bottom; The middle support layer is divided into a plurality of support blocks, and the plurality of support blocks are used to respectively correspond to the first part and the second part of the lower limbs of the user; as well as, A plurality of pressure sensors are installed on the middle support layer, and each of the pressure sensors is connected to at least one of the support blocks.

2. The sitting posture monitoring chair according to claim 1, It is characterized in that The plurality of support blocks include a first middle column block and a second middle column block, and the first middle column block and the second middle column block are symmetrically distributed.

3. The sitting posture monitoring chair according to claim 2, It is characterized in that The first part of the user's lower limbs includes the front thigh and the back thigh, and the second part of the user's lower limbs includes the buttocks; the first middle column blocks include the first right block, the second right block and the third right block, and the first right block, the second right block and the third right block are arranged in sequence from front to back of the sitting posture monitoring chair, wherein the first right block corresponds to supporting the front of the user's right thigh, the second right block corresponds to supporting the back of the user's right thigh, and the third right block corresponds to supporting the right side of the user's buttocks.

4. The sitting posture monitoring chair according to claim 3, It is characterized in that The second middle column blocks include a first left block, a second left block and a third left block, which are arranged in sequence from front to back of the sitting posture monitoring chair, wherein the first left block corresponds to the front of the left thigh supporting the user, the second left block corresponds to the back of the left thigh supporting the user, and the third left block corresponds to the left side of the buttocks supporting the user.

5. The sitting posture monitoring chair according to claim 2, It is characterized in that The plurality of supporting blocks further include a first side block and a second side block, wherein the first side block is connected to a side of the first middle column block away from the second middle column block, and the second side block is connected to a side of the second middle column block away from the first middle column block.

6. The sitting posture monitoring chair according to claim 5, It is characterized in that The first side block and the second side block each include a plurality of split blocks, and the plurality of split blocks are arranged side by side in a front-to-rear direction of the sitting posture monitoring seat.

7. The sitting posture monitoring chair according to claim 4, It is characterized in that The ratio of the partition lengths of the first right side block, the second right side block and the third right side block in the front-to-rear direction of the sitting posture monitoring seat is 1:4:3; The ratio of the partition lengths of the first left side block, the second left side block and the third left side block in the front-to-rear direction of the sitting posture monitoring seat is 1:4:

3.

8. The sitting posture monitoring chair according to claim 1, It is characterized in that The surface layer includes a fabric layer and a soft cushion layer, wherein the fabric layer is wrapped around the outside of the soft cushion layer and is connected and fixed to the middle support layer; Wherein, the soft cushion layer and the intermediate support layer are both provided with a concave structure formed inwardly in the same direction, and the concave structure is used to adapt to the contour of the user's buttocks.

9. The sitting posture monitoring chair according to claim 2, It is characterized in that The seat cushion further comprises a carrier layer, which is arranged below the middle support layer; the carrier layer comprises a structural support plate and a bottom shell, the structural support plate is arranged on the bottom shell, a control circuit board is mounted on the bottom shell, and the control circuit board is electrically connected to the pressure sensor; The structural support plate is provided with a plurality of mounting holes, each of the supporting blocks is arranged corresponding to at least one of the mounting holes, and the pressure sensor is installed in the mounting hole and abuts against the supporting block.

10. The sitting posture monitoring chair according to claim 9, It is characterized in that The pressure sensor is detachably installed in the mounting hole.

11. The sitting posture monitoring chair according to claim 9, It is characterized in that The pressure sensor is configured as a strain type pressure sensor, which includes an elastic component, a strain gauge and a fixed component. The elastic component is movably mounted on the hole wall of the mounting hole, the strain gauge is mounted on the elastic component, and the fixed component passes through the elastic component and is fixedly connected to the corresponding supporting block.

12. The sitting posture monitoring chair according to claim 11, It is characterized in that The elastic component includes a main body and a loading part connected to each other, the main body is fixed to the hole wall of the mounting hole by two legs, a first avoidance gap is formed between the outer contour of the main body away from the loading part and the hole wall of the mounting hole, and a second avoidance gap is formed between the outer contour of the loading part away from the main body and the hole wall of the mounting hole, the strain gauge is installed on the main body, and the fixing component is penetrated through the loading part.

13. The sitting posture monitoring chair according to claim 9, It is characterized in that Two rows of pressure sensors are respectively arranged on the carrier layer corresponding to the first middle row of blocks and the second middle row of blocks, and the pressure sensors in the two rows of pressure sensors are staggered in the front-to-back direction of the sitting posture monitoring seat.

14. The sitting posture monitoring chair according to any one of claims 1 to 13, It is characterized in that The sitting posture monitoring seat further comprises a seat back, a waist pad, a chassis and a back sensor, wherein the seat pad is arranged above the chassis, the seat back is arranged at the rear side of the chassis, the waist pad is arranged on the seat back, and the back sensor is arranged on the waist pad and / or the seat back; The carrier layer includes a structural support plate and a bottom shell. The structural support plate is arranged on the bottom shell and connected to the chassis. The back sensor is electrically connected to a control circuit board installed on the bottom shell.

15. The sitting posture monitoring chair according to claim 14, It is characterized in that The sitting posture monitoring seat further includes a gas spring, a pedal, a foot pedal sensor, a bracket and rollers. The gas spring is connected between the chassis and the pedal. The foot pedal sensor is detachably installed on the pedal and electrically connected to the control circuit board. The bracket is connected to the bottom of the pedal, and the rollers are rotatably arranged on the bracket.

16. The sitting posture monitoring seat according to claim 15, wherein, the sitting posture monitoring seat further includes a data processing module, a data storage module and a data transmission module. The data processing module, the data storage module and the data transmission module are respectively installed on the chassis or the pedal. The pressure sensor, the back sensor and the foot pedal sensor are respectively electrically connected to the data processing module. The data processing module is electrically connected to the data storage module, and the data storage module is electrically connected to the data transmission module. The data transmission module is used for data transmission and interaction with the APP in the external terminal.

17. The sitting posture monitoring seat according to claim 16, wherein, the sitting posture monitoring seat further includes a reminder module. The reminder module is electrically connected to the pressure sensor, the back sensor and the foot pedal sensor. The reminder module is used for giving a sound or vibration reminder after identifying an abnormal sitting posture.

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