阅读说明：本技术 一种轮椅及其充放气控制方法 (Wheelchair and air inflation and deflation control method thereof ) 是由 王浩 马鹏飞 于尊 宋振伟 何雪杰 于 2021-08-17 设计创作，主要内容包括：本发明公开了一种轮椅及其充放气控制方法,轮椅的轮系总成上设有用于监测路面状态的矢量传感器,充气坐垫包括用于监测座压的感知模块、多个独立的气囊以及对气囊进行充放气的充放气组件,控制模块根据矢量传感器和感知模块反馈的数据控制充放气组件对各气囊进行充气或放气。通过压力监测来调整坐垫内各独立气囊的充放气,实现座压均衡,对乘坐人员的重心进行调整,提高乘坐舒适度,确保乘坐人员的安全。(The invention discloses a wheelchair and an inflation and deflation control method thereof.A wheel train assembly of the wheelchair is provided with a vector sensor for monitoring the road surface state, an inflatable cushion comprises a sensing module for monitoring the seat pressure, a plurality of independent air bags and an inflation and deflation component for inflating and deflating the air bags, and a control module controls the inflation and deflation component to inflate or deflate each air bag according to data fed back by the vector sensor and the sensing module. Inflation and deflation of each independent air bag in the cushion are adjusted through pressure monitoring, seat pressure balance is achieved, the center of gravity of a passenger is adjusted, riding comfort is improved, and safety of the passenger is guaranteed.)

1. A wheelchair, comprising:

the vehicle frame is provided with a gear train assembly, and the gear train assembly is provided with a vector sensor for monitoring the state of a road surface;

the inflatable cushion comprises a sensing module for monitoring seat pressure, a plurality of independent air bags and an inflation and deflation assembly for inflating and deflating the air bags;

the control module is respectively communicated with the vector sensor, the sensing module and the air charging and discharging assembly;

the control module controls the inflation and deflation assembly to inflate or deflate each air bag according to data fed back by the vector sensor and the sensing module.

2. The wheelchair of claim 1,

the air bags are arranged in an array form, and the gravity center position of a passenger is adjusted by adjusting the inflation quantity of each air bag.

3. The wheelchair of claim 2,

the wheelchair further comprises an attitude sensor for monitoring the attitude information of the wheelchair;

when the wheelchair is in a rapid acceleration state, the attitude sensor feeds back the acceleration and corner signals of the wheelchair to the control module, the control module controls the gear train assembly to decelerate, the whole height of the inflatable cushion is reduced, and the inflatable quantity of the airbag at the rear side is smaller than that at the front side so as to move the gravity center of the passenger backwards.

4. The wheelchair of claim 2,

the wheelchair further comprises an attitude sensor for monitoring the attitude information of the wheelchair;

when the wheelchair receives external impact, attitude sensor will this moment the acceleration and corner signal feedback of wheelchair extremely control module, control module control the gear train assembly slows down and brakies, the whole height of inflatable cushion reduces, and is close to the impact side the inflation volume of gasbag is less than and keeps away from the impact side the inflation volume of gasbag is in order to remove the centre of gravity of taking personnel towards the impact direction of dorsad.

5. Wheelchair in accordance with claim 3 or 4,

the control module further comprises a visual recognition system, and when the attitude sensor detects that the acceleration or the rotation vector angle of the wheelchair is larger than a set safety value, the visual recognition system carries out an emergency recording state and outputs video data in a time period close to T.

6. The wheelchair of claim 1,

the inflation and deflation assembly comprises an air pump, an air inlet of the air pump is communicated with the atmosphere, an air outlet of the air pump is communicated with an air storage tank, the air storage tank is communicated with the air bags through a diversion pipe network, and control valves are arranged on pipelines of the air bags and the air storage tank.

7. The wheelchair of claim 1,

the inflatable cushion has a massage mode, and the inflation and deflation assembly inflates and deflates each air bag at a certain frequency.

8. A method of controlling inflation and deflation of a wheelchair as claimed in any of claims 1 to 7, comprising:

presetting the corresponding relation between the seat pressure at different positions of the inflatable cushion and the pressure value of the air bag at the corresponding position;

acquiring road surface information;

obtaining seat pressure information;

and inflating or deflating each air bag according to the road surface information, the seat pressure information and the corresponding relation.

9. The wheelchair inflation and deflation control method of claim 8,

when the wheelchair is in a rapid acceleration state, the acceleration and corner signals of the wheelchair are fed back to the control module by utilizing the attitude sensor, the control module controls the gear train assembly to decelerate, the whole height of the inflatable cushion is reduced, and the inflatable quantity of the air bag is smaller than that of the front side so as to move the gravity center of a passenger backwards.

10. The wheelchair inflation and deflation control method of claim 8,

when the wheelchair receives external impact, utilize attitude sensor will this moment the acceleration and corner signal feedback of wheelchair extremely control module, control module control the gear train assembly slows down and brakies, the whole height of inflatable cushion reduces, and is close to the impact side the inflation volume of gasbag is less than and keeps away from the impact side the inflation volume of gasbag is in order to remove the focus of taking personnel towards the impact direction of dorsad.

Technical Field

The invention relates to the technical field of wheelchairs, in particular to a wheelchair and an inflation and deflation control method thereof.

Background

In recent years, the technology of the wheelchair is further developed into an intelligent wheelchair, and the execution capacity of the wheelchair to move autonomously according to the instructions of human beings is increased and enhanced. The wheelchair can be used more conveniently by a wheelchair user, dependence on a caregiver or other family personnel is eliminated, the purpose of movement is achieved more independently, and more professional wheelchair products with outstanding functional characteristics emerge in the market continuously.

The electric wheelchairs in the existing market are basically realized on the common wheelchair structure by simply adding a motor and a battery and a simple control unit. Above-mentioned electric wheelchair exists and experiences the utmost point badly to the long-time comfort of taking of passenger, relies on the wheelchair to help the crowd of trip to need for a long time, causes the leg numb, the sour bloated, the lumbar muscle strain scheduling problem that lead to for a long time of sitting easily, influences the personnel of taking and takes the comfort level. Meanwhile, the gravity center of the seat is fixed, the sitting posture of a passenger cannot be adjusted according to road conditions, the problem that the wheelchair is prone to tip over when the passenger goes up and down a slope or on a bumpy road surface is solved, and the safety of the passenger is seriously affected.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems pointed out in the background technology, the invention provides a wheelchair and an inflation and deflation control method thereof, which adjust the inflation and deflation of each independent air bag in a cushion through pressure monitoring, realize seat pressure balance, adjust the gravity center of a passenger, improve the riding comfort and ensure the safety of the passenger.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

the present invention provides a wheelchair comprising:

the vehicle frame is provided with a gear train assembly, and the gear train assembly is provided with a vector sensor for monitoring the state of a road surface;

the inflatable cushion comprises a sensing module for monitoring seat pressure, a plurality of independent air bags and an inflation and deflation assembly for inflating and deflating the air bags;

the control module is respectively communicated with the vector sensor, the sensing module and the air charging and discharging assembly;

the control module controls the inflation and deflation assembly to inflate or deflate each air bag according to data fed back by the vector sensor and the sensing module.

In some embodiments, the airbags are arranged in an array, and the center of gravity of the passenger is adjusted by adjusting the inflation amount of each airbag.

In some embodiments of the present application, an attitude sensor for monitoring the wheelchair attitude information is further included;

when the wheelchair is in a rapid acceleration state, the attitude sensor feeds back the acceleration and corner signals of the wheelchair to the control module, the control module controls the gear train assembly to decelerate, the whole height of the inflatable cushion is reduced, and the inflatable quantity of the airbag at the rear side is smaller than that at the front side so as to move the gravity center of the passenger backwards.

In some embodiments of the present application, an attitude sensor for monitoring the wheelchair attitude information is further included;

when the wheelchair receives external impact, attitude sensor will this moment the acceleration and corner signal feedback of wheelchair extremely control module, control module control the gear train assembly slows down and brakies, the whole height of inflatable cushion reduces, and is close to the impact side the inflation volume of gasbag is less than and keeps away from the impact side the inflation volume of gasbag is in order to remove the centre of gravity of taking personnel towards the impact direction of dorsad.

In some embodiments of the present application, the control module further includes a visual recognition system, and when the attitude sensor detects that the acceleration or the rotation vector angle of the wheelchair is greater than a set safety value, the visual recognition system performs an emergency recording state and outputs video data within a time period of approximately T.

In some embodiments of this application, fill gassing subassembly includes the air pump, the air inlet and the atmosphere intercommunication of air pump, the gas outlet and the gas holder intercommunication of air pump, the gas holder pass through the water conservancy diversion pipe network with the gasbag intercommunication, each the gasbag with be equipped with the control valve on the pipeline of gas holder intercommunication.

In some embodiments of the present application, the inflatable cushion has a massage mode, and the inflation and deflation assembly inflates and deflates each of the air cells at a certain frequency.

The present embodiment further provides an inflation/deflation control method for a wheelchair, including:

presetting the corresponding relation between the seat pressure at different positions of the inflatable cushion and the pressure value of the air bag at the corresponding position;

acquiring road surface information;

obtaining seat pressure information;

and inflating or deflating each air bag according to the road surface information, the seat pressure information and the corresponding relation.

In some embodiments of this application, when the wheelchair was in the rapid acceleration state, utilize attitude sensor will this moment the acceleration and the corner signal feedback of wheelchair extremely control module, control module control the gear train assembly slows down, the whole height of inflatable cushion reduces, and is located the rear side the inflation volume of gasbag is less than and is located the front side the inflation volume of gasbag is in order to move backward with the focus that will take personnel.

In some embodiments of this application, when the wheelchair received external impact, utilize attitude sensor will this moment the acceleration and the corner signal feedback of wheelchair extremely control module, control module control the gear train assembly slows down and brakes, the whole height of inflatable cushion reduces, and is close to the impact side the inflation volume of gasbag is less than and keeps away from the impact side the inflation volume of gasbag is in order to remove the centre of gravity with the person of taking towards the impact direction of dorsad.

Compared with the prior art, the invention has the advantages and positive effects that:

the disclosed wheelchair of this application combines the environmental aspect of camera vision system feedback through the road surface condition with front wheel, rear wheel feedback, effectively adjusts passenger's position of sitting on the wheelchair, controls wheelchair power simultaneously, ensures passenger's travelling comfort and the security under the dangerous condition.

The control module fills the gassing subassembly according to the data control of vector sensor and perception module feedback and aerifys or deflate each gasbag, realizes adjusting the position of the focus of taking personnel, and then realizes the adjustment of position of sitting, improves the travelling comfort of taking personnel, can realize that zero pressure sits to feel and experience.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Figure 1 is an exploded schematic view of a wheelchair according to an embodiment;

FIG. 2 is an exploded view of an inflatable cushion according to an embodiment;

FIG. 3 is a schematic diagram of an exploded structure of a cushion portion according to an embodiment;

FIG. 4 is a schematic diagram of a structure of an air cushion portion according to an embodiment;

FIG. 5 is an exploded view of a base portion according to an embodiment;

FIG. 6 is an exploded view of a front wheel assembly according to an embodiment;

FIG. 7 is an exploded view of a rear wheel assembly according to an embodiment.

Reference numerals:

100-an inflatable cushion;

110-cushion part, 111-cushion part, 112-supporting layer, 113-sensing module, 114-vent;

120-an air cushion part, 121-an air bag, 122-a vent hole, 123-an air inlet nozzle;

130-base part, 1311-first air pump, 1312-second air pump, 1313-air pump air inlet pipe, 1314-air pump air outlet pipe, 1315-air guide pipe, 1316-air inlet filter tip, 132-air storage tank, 133-pressure sensor, 134-pressure relief valve, 135-control valve, 136-diversion pipe network, 1361-diversion pipe, 1362-air outlet nozzle, 137-lower shell, 1371-first opening, 138-upper cover, 1381-second opening, 1382-mounting hole and 139-axial flow fan;

210-control monitoring module, 220-control mainboard, 230-attitude sensor, 240-hard disk;

300-a frame;

400-pedaling;

500-front wheel assembly, 510-front wheel, 520-front wheel carrier, 530-first fixed axle, 540-first vector sensor;

600-rear wheel assembly, 610-rear wheel, 620-fixed seat, 630-second fixed shaft, 640-second vector sensor and 650-motor;

700-power supply module.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

The invention aims to solve the problems that the traditional wheelchair has poor riding comfort for a rider in the long-term riding process, and the gravity center of the rider cannot be timely adjusted to cause the wheelchair to topple or the rider violently jolts to cause discomfort under the environments of a steep slope and a jolt road; the defects and defects that the emergency can not carry out effective early warning and the like occur.

The invention provides a cushion self-adaptive adjustment and safety guarantee system. The system is not only suitable for wheelchair equipment, but also suitable for other auxiliary seat tools.

The system is produced in a modularized mode, is convenient to mount and dismount, adopts a distributed design, is used for effectively filtering road jolt, and automatically adjusts according to the speed, the inclination angle and the road condition of the wheelchair, so that the comfort of passengers is ensured.

Simultaneously, adjust the focus position through the position of sitting, realize that zero pressure sits to feel and experiences.

The safety APP is matched to realize remote monitoring, emergency early warning of accidental situations such as wheelchair rollover, sitting personnel leaving seat and impact and real-time linkage are realized, and family members are timely informed under the accidental situations of the sitting personnel.

The wheelchair mainly realizes that a system module adopts an intelligent adjusting system, the sitting posture of a passenger on the wheelchair is effectively adjusted by combining the road surface condition fed back by the front wheel and the rear wheel and the environment condition fed back by the camera vision system, and meanwhile, the power of the wheelchair is controlled, so that the comfort and the safety of the passenger under dangerous conditions are ensured.

Referring to fig. 1, the wheelchair of the present embodiment mainly includes a frame 300, an inflatable cushion 100, a control module, a power supply module 700, and the like.

The frame 300 serves as a frame portion of the entire wheelchair, and serves as a rigid support unit of the wheelchair, and is detachably housed by itself.

The frame 300 is provided with a wheel train assembly, which includes a front wheel assembly 500 and a rear wheel assembly 600.

The front wheel assembly 500 includes a left front wheel assembly and a right front wheel assembly, which are primarily used for wheelchair guidance.

The front wheel assembly 500 is provided with a first vector sensor 540 for monitoring a state of a road surface ahead.

Referring to fig. 6, the front wheel assembly 500 includes a front wheel 510, a front wheel frame 520, and a first fixed shaft 530, the front wheel 510 is disposed on the front wheel frame 520 through the first fixed shaft 530, the front wheel frame 520 is connected to the frame 300, and the first vector sensor 540 is disposed on the first fixed shaft 530.

The rear wheel assembly 600 includes a left rear wheel assembly and a right rear wheel assembly, and is mainly used for driving the wheelchair to travel and brake.

The rear wheel assembly 600 is provided with a second vector sensor 640 for monitoring a road surface condition.

Referring to fig. 7, the rear wheel assembly 600 includes a rear wheel 610, a fixing base 620, a second fixing shaft 630 and a motor 650, the second fixing shaft 630 is connected to a power shaft of the motor 650, the rear wheel 610 is rotatably disposed on the fixing base 620 through the second fixing shaft 630, the fixing base 620 is connected to the frame 300, and the second vector sensor 640 is disposed on the second fixing shaft 630.

The front of the frame 300 is provided with a pedal 400 for placing feet of a passenger who is not convenient to walk and effectively supporting both legs at the same time.

The power module 700 is used to power the entire wheelchair.

The inflatable cushion 100 is used as a core module of the present invention, and is mainly used for adjusting the sitting posture of a whole passenger, filtering out road bumps, adjusting the position of the center of gravity of the passenger, and ensuring the comfort and safety of the passenger.

The inflatable seat cushion 100 includes a sensing module 113 for monitoring a seat pressure, a plurality of independent air cells 121, and an inflation and deflation assembly for inflating and deflating each air cell 121.

The control module is respectively communicated with the vector sensors (including the first vector sensor 540 and the second vector sensor 640), the sensing module 113 and the inflation and deflation assembly.

The control module fills the gassing subassembly according to the data control of vector sensor and perception module feedback and aerifys or deflate each gasbag 121, realizes adjusting the position of the focus of taking personnel, and then realizes the adjustment of position of sitting, improves the travelling comfort of taking personnel, can realize that zero pressure sits to feel and experience.

The control module includes two parts, namely a control monitoring module 210 and a control main board 220.

The control monitoring module 210 is disposed on the frame 300, and a vision recognition system is disposed in the control monitoring module 210 and a camera is used to obtain images.

The control main board 220 is disposed in the inflatable cushion 100.

With respect to the specific arrangement of the inflatable cushion 100, in some embodiments of the present application, referring to fig. 2 to 5, the inflatable cushion 100 includes a cushion portion 110, an air cushion portion 120 and a base portion 130, the air cushion portion 1201 is disposed between the cushion portion 110 and the base portion 130, and the three components are installed quickly through a quick connection interface.

The seat cushion portion 110 is provided with a sensing module 113, and the sensing module 113 is used for monitoring the seat pressure of the passengers.

A plurality of independent air cells 121 are arranged in the air cushion part 120, and each air cell 121 can be inflated or deflated independently.

The base portion 130 is provided therein with an inflation/deflation unit for inflating or deflating the airbag 121.

The inflation and deflation assembly inflates or deflates each air bag 121 according to the seat pressure monitored by the sensing module 113.

Inflating or deflating each balloon 121 can serve at least two purposes.

One purpose is in order to realize zero pressure sitting feel, improve the comfort level of taking, the volume of inflating of corresponding position department gasbag 121 is adjusted according to the seat pressure data of different positions this moment to make the seat pressure of different positions reach evenly, the person of taking this moment takes the focus and reaches optimum state.

Another purpose is to prevent the passenger from tipping over when the wheelchair is accelerated suddenly or receives an impact, and at this time, the inflation/deflation amount of the air bag 121 is adjusted according to the sudden acceleration advancing direction or the impact force receiving direction, so that the gravity center of the passenger is lowered and the gravity center is moved back to the sudden acceleration advancing direction or the impact force receiving direction.

For the specific arrangement of the inflation and deflation assembly, in some embodiments of the present application, referring to fig. 5, the inflation and deflation assembly includes an air pump, an air inlet of the air pump is communicated with the atmosphere, an air outlet of the air pump is communicated with an air storage tank 132, the air storage tank 132 is communicated with the air bags 121 through a diversion pipe network 136, and a control valve 135 is disposed on a pipeline through which each air bag 121 is communicated with the air storage tank 132.

Specifically, the air pump comprises a first air pump 1311 and a second air pump 1312, the first air pump 1311 is communicated with the second air pump 1312 through an air guide pipe 1315, an air inlet of the first air pump 1311 is communicated with an air pump air inlet pipe 1313, one end of the air pump air inlet pipe 1313 is provided with an air inlet filter 1316 and is communicated with the atmosphere, and an air outlet of the second air pump 1312 is communicated with the air storage tank 132 through an air pump air outlet pipe 1314.

The air is filtered by the air inlet filter 1316, enters the first air pump 1311 through the air pump inlet pipe 1313, enters the second air pump 1312 through the air guide pipe 1315 after being pressurized, and enters the air storage tank 132 through the air pump outlet pipe 1314 after being pressurized for the second time.

The control valve 135 is opened, and the compressed gas in the gas storage tank 132 flows into the corresponding gas bag 121 through the diversion pipe network 136 to realize inflation.

The gas tank 132 is provided with a pressure sensor 133 for detecting the pressure of the gas in the gas tank 132.

When the pressure sensor 133 detects that the pressure within the air tank 132 reaches a set value, the control valve 135 is opened to inflate the corresponding air bag 121.

The opening degree of the control valve 135 is adjusted according to the output data (including seat pressure, road condition information, etc.) of the control main board 220, thereby adjusting the inflation amount of each air bag 121.

The air storage tank 132 is required to have a certain pressure and then inflate the air bag 121, so as to achieve the effect of balancing the pressure.

The air storage tank 132 is provided with a pressure release valve 134, and when the sensing module 113 detects that the seat pressure exceeds a set value, the pressure release valve 134 is opened to release air for the air bag 121.

The diversion pipe network 136 is composed of a plurality of diversion pipes 1361, the diversion pipes 1361 are communicated with each other, the diversion pipes 1361 are provided with air outlet nozzles 1362 which are communicated with the air bags 121 in a one-to-one correspondence manner, each air bag 121 is provided with an air inlet nozzle 123, and the air outlet nozzles 1362 are communicated with the air inlet nozzles 123 in a butt joint manner.

When a passenger sits on the inflatable cushion 100, the sensing module 113 monitors the seat pressure of the passenger, feeds pressure data back to the control main board 220, confirms whether the seat pressure reaches the preset seating weight, and when the seat pressure is met, the whole machine is powered on and started. Otherwise, the device is not started and still in a braking state, so that the wheelchair is not started to consume power due to the fact that objects are placed on the seat cushion or dangers are caused due to the fact that the child controls the wheelchair to move randomly under the condition that the main power supply is turned on.

Because the wheelchair is used for different crowds, the weight of the starting passenger is 40kg by default, and the function can be set through APP.

After the passenger takes a certain time, for example, 30s, the system feeds back the distribution data of the sitting posture and the pressure distribution to the control board 220 again, and the control board 220 starts the first air pump 1311 and the second air pump 1312 to prepare the compressed air, and inputs the prepared compressed air into the air storage tank 132. At this time, the pressure sensor 133 in the air tank 132 monitors the pressure in the air tank 132 in real time, and when the pressure reaches a set value, the control valve 135 is opened, the gas in the air tank 132 enters the inflation pipe network 136, and the gas is shunted to enter each air cell 121, so that each air cell 121 is inflated. When the sensing module 113 monitors that the pressure is uniform, the control valve 135 is closed, and the sitting center of gravity of the sitting person reaches the optimal state, so that the zero-pressure sitting feeling is realized.

When the pressure exceeds the limit value or the sitting posture of the passenger changes and pressure relief is needed, the pressure relief valve 134 is opened, the air bag 121 exhausts air, and the sitting pressure is adjusted again to ensure the optimal sitting feeling.

In some embodiments of the present application, referring to fig. 5, the base portion 130 includes a lower shell 137 and an upper cover 138, the lower shell 137 and the upper cover 138 are connected to form a mounting cavity, the inflation and deflation assembly is disposed in the mounting cavity, and the air cushion portion 120 is disposed on the upper cover 138.

The control main board 220 is also arranged in the mounting cavity, and contributes to water resistance.

A first opening 1371 is formed in a sidewall of the lower housing 137 for receiving the intake filter 1316. A second plurality of openings 1381 are provided in the cover 138 for the exit nozzle 1362 to extend out to be in abutting communication with the inlet nozzle 123.

For the specific arrangement of the cushion part 110, in some embodiments of the present application, referring to fig. 3, the cushion part 110 includes a support layer 112 and a cushion layer 111 disposed on top of the support layer 112, the sensing module 113 is disposed between the support layer 112 and the cushion layer 111, and the support layer 112 is disposed on top of the cushion part 120.

The cushion layer 111 is a soft-packaged foamed cushion, and the embodiment does not specifically limit the coating layer and the foamed layer.

The soft package foaming cushion and the supporting layer 112 can be foamed integrally, the sensing module 113 is arranged in the cushion, and data of the sensing module is interacted with the control main board 220 through Bluetooth.

The sensing module 113 can adopt a finished product module in the prior art, and can effectively and comprehensively monitor the seat pressure by reasonably arranging the distribution of the sensing module 113 in the seat cushion part.

In this embodiment, the sensing module 113 has an H-shaped structure, and can avoid the vent 114 for ventilation on the cushion.

With regard to the specific arrangement of the cushion portion 120, in some embodiments of the present invention, the plurality of air bags 121 are arranged in an array, and the position of the center of gravity of the occupant is adjusted by adjusting the amount of inflation of each air bag 121.

In this embodiment, nine air bags 121 are provided, fig. 4 (a) is a schematic perspective view of the air cushion part 120, fig. 4(b) is a bottom view of the air cushion part 120, nine air bags 121 are in a 3 × 3 array, which are sequentially numbered 1-9, and when the air bags 121 are inflated, the height of the air bags 121 is increased.

When the wheelchair needs to be moved, the built-in camera of the control monitoring module 210 collects data in front of the wheelchair, feeds the data back to the control mainboard 220 for visual data identification, and when the front is not suspended or cliff is broken, the control module is unlocked, the motors 650 in the left rear wheel assembly and the right rear wheel assembly are in contact with a brake state, and the wheelchair is changed into a manual control state. At this time, the first vector sensor 540 disposed on the front wheel assembly monitors the road surface state in real time, and feeds back the road condition data to the control main board 220, and meanwhile, the second vector sensor 640 disposed on the rear wheel assembly monitors the road surface state at the rear wheel and the slip conditions of the left and right wheels in real time, and feeds back the road condition data to the control main board 220, and the control main board 220 performs independent inflation and deflation control on each airbag 121 through the control of the first air pump 1311, the second air pump 1312, the control valve 135, and the relief valve 134 by analyzing the road feel under different conditions, and performs air pressure adjustment, and effectively filters the bump on the road surface, and meanwhile, the cooperative sensing module 113 adjusts the sitting posture, so as to realize seat pressure equalization of the passengers, and achieve the comfort of zero-pressure riding.

In some embodiments of the present application, in order to further improve the riding comfort, the wheelchair further has a ventilation function and a massage function.

The ventilation function is realized as follows: referring to fig. 5, the upper cover 138 is provided with a plurality of axial fans 139, and the air cushion portion 120 is provided with vent holes 122 corresponding to the plurality of axial fans 139; the sensing module 113 can also monitor the seat temperature, when the seat temperature reaches a set value, the control main board 220 controls the axial flow fan 139 to open, and the airflow generated by the axial flow fan 139 flows to the cushion portion 110 through the ventilation hole 122, so as to ventilate the cushion and maintain the comfort of the passenger in the sitting state, especially for a long time.

The upper cover 138 is provided with a mounting hole 1382, and the axial flow fan 139 is arranged in the mounting hole 1382, so that a certain heat dissipation effect is achieved on related electric devices in the mounting cavity.

In this embodiment, nine axial fans 139 are provided, and the nine axial fans correspond to the nine air bags 121 in one-to-one arrangement position.

The massage function is realized as follows: when the passenger sits for a long time fixedly, the user can start the air cushion pulse mode on the premise that the vehicle is braked and does not run, the inflation and deflation component inflates and deflates each air bag 121 at a certain frequency, and a certain massage effect is realized through pressure change and height change generated when each air bag 121 inflates and deflates, so that the problem of poor circulation of blood when the passenger sits for a long time is prevented.

The air cushion portion 120 in this embodiment has an independent structure, and can be compatible with almost all electric wheelchairs at present, and the base portion 130 is provided with a plurality of quick interfaces, has good compatibility with existing wheelchairs, and can be realized by simple modification, thereby improving the riding experience and the safety of the conventional wheelchairs.

In some embodiments of the present application, the wheelchair further comprises an attitude sensor for detecting attitude information of the wheelchair. 230

The attitude sensor 230 is provided in the mounting cavity of the base portion 130, facilitating communication with the control main board 220.

The attitude sensor 230 may also be located elsewhere on the wheelchair.

When the wheelchair is in a rapid acceleration state, the attitude sensor 230 feeds back the acceleration and the corner signal of the wheelchair to the control module, the control module controls the gear train assembly to decelerate, the overall height of the inflatable cushion 100 is reduced, and the inflation quantity of the airbag 121 positioned at the rear side is smaller than that of the airbag 121 positioned at the front side so as to move the gravity center of the passenger backwards.

Specifically, when the wheelchair is in a rapid acceleration state, the attitude sensor 230 feeds back the acceleration and the corner signal of the wheelchair to the control main board 220, the control main board 220 transmits a signal to control the motors 650 in the left and right rear wheel assemblies to control the deceleration of the wheelchair, and at this time, the control main board 220 repeats the above control process due to the change of the pressure on the cushion part 130 under the acceleration of the human body, and the air bags 121 are inflated and deflated. At this time, the height of the air cushion portion 120 as a whole is reduced, and unlike the simple balance of the seating pressure of the occupant, the pressure of the rear side airbags 121 (specifically, rear side airbags numbered 7, 8, and 9 in the present embodiment) is appropriately reduced, and the pressure of the front side airbags 121 (specifically, rear side airbags numbered 1, 2, and 3 in the present embodiment) is appropriately and relatively increased, so that the center of gravity of the occupant is reduced and moved backward, and the occupant is prevented from falling off the seat by leaning forward, and the impact on the human body is effectively reduced.

When the wheelchair is impacted by external impact or in a rapid downhill state, the attitude sensor 230 feeds back the acceleration and the corner signal of the wheelchair to the control module, the control module controls the gear train assembly to decelerate and brake, the overall height of the inflatable cushion 100 is reduced, and the inflation quantity of the airbag close to the impact side is smaller than that of the airbag far away from the impact side so as to move the gravity center of a passenger towards the direction opposite to the impact direction.

Specifically, when the wheelchair is subjected to external impact or a rapid downhill state, the attitude sensor 230 feeds back acceleration and corner signals of the wheelchair to the control main board 220, and the control main board 220 transmits signals to control the motors 650 in the left and right rear wheel assemblies to control the deceleration and rapid braking of the wheelchair. At this time, since the pressure of the human body on the cushion part changes under the acceleration, the control main board 220 repeats the above control process to inflate and deflate each air cell 121. At this time, the height of the air cushion portion 120 as a whole is reduced, and unlike the simple balance of the seating pressure of the occupant, the pressure of the airbag 121 on the side of the impact side or the front end of the wheelchair is appropriately reduced, and the pressure of the airbag 121 on the other side is appropriately increased, so that the center of gravity of the occupant is lowered to the opposite direction of the impact or the front end of the seat is moved, and the occupant is prevented from falling off the seat by tilting forward, and the impact on the human body is effectively reduced.

In some embodiments of the present application, when the attitude sensor 230 detects that the acceleration or the rotation vector angle of the wheelchair is greater than a set safety value, the visual recognition system performs an emergency recording state, and transmits video data in a time period of approximately T (for example, 1 minute) to a family of a passenger or a designated safety officer through APP output, so as to implement a danger early warning.

And the subsequent monitoring camera continuously records, stores the data into the NVR hard disk 240 in the mounting cavity and stores the data.

The wheelchair in the embodiment can effectively realize sitting posture control of passengers and realize good protection of the passengers under dangerous conditions by the aid of the inflatable cushion 100 and the feedback data of the sensors in the wheel assemblies. Aiming at the crowd who go out in a wheelchair for a long time, the wheelchair provides more convenient, safe and comfortable riding experience.

The embodiment also discloses an air inflation and deflation control method applied to the wheelchair, which comprises the following steps:

presetting the corresponding relation between the seat pressure of different positions of the inflatable cushion 100 and the pressure value of the air bag 121 at the corresponding position;

acquiring road surface information;

obtaining seat pressure information;

the respective air cells 121 are inflated or deflated according to the road surface information, the seat pressure information, and the correspondence relationship.

When the wheelchair is in a rapid acceleration state, the acceleration and the corner signal of the wheelchair are fed back to the control module by the attitude sensor 230, the control module controls the gear train assembly to decelerate, the overall height of the inflatable cushion 100 is reduced, and the inflation quantity of the airbag 121 positioned at the rear side is smaller than that of the airbag 121 positioned at the front side so as to move the gravity center of a passenger backwards.

When the wheelchair is impacted externally, the acceleration and the corner signal of the wheelchair are fed back to the control module by the attitude sensor 230, the control module controls the gear train assembly to decelerate and brake, the whole height of the inflatable cushion 100 is reduced, and the inflation quantity of the airbag 121 close to the impact side is smaller than that of the airbag 121 far away from the impact side so as to move the gravity center of a passenger towards the impact direction.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.