TWI612953B - Wheelchair dynamic sitting system - Google Patents

Description

Wheelchair dynamic sitting system

This creation is a wheelchair dynamic sitting system, especially a wheelchair dynamic sitting system that avoids the complications of wheelchair users due to sedentary.

Most of the users of wheelchairs nowadays are patients with lower limb diseases or elderly people with weak muscles or muscles in the lower limbs. People who use wheelchairs have many problems in life. Apart from the inconvenience of movement, the most troublesome is the sedentary of wheelchairs. Cumulative complications, clinically common with pressure sores, are caused by long-term stress on the caudal vertebrae, ischial trochanter and various bones of the human body, resulting in ischemia, hypoxia and ulceration.

The existing method for improving the pressure sore of a wheelchair user is to take a dynamic wheelchair, which can be divided into two types, one is a dynamic adjustment effect by a combination seat, and the combined seat includes a front half chair. a seat and a rear half seat, and electrically controlling the front half seat and the rear half seat to be alternately moved up and down by a control unit, and when the user needs to change the sitting posture, the rear half seat is controlled by the control unit The downward tilting can release the contact between the user's ischial bone and the modular seat, thereby dispersing the continuous stress concentrated on the user's ischium.

Another type of dynamic wheelchair uses a four-bar linkage mechanism to control the back and forth movement of the seat back to achieve dynamic adjustment. The dynamic wheelchair includes a chair frame, a seat frame, a four-bar linkage mechanism, a seat back, and two front wheels. The second rear wheel is disposed on the seat frame, and the four-bar linkage mechanism is disposed on the seat. The four-bar linkage mechanism comprises a bottom rod, an adjusting rod, an actuating member, a horizontal rod and a linkage a rod connecting the seat, one end of the adjusting rod being rotatably coupled to the center of the bottom rod, the actuating member connecting the bottom rod And the adjusting rod, the actuating member adjusts an acute angle between the adjusting rod and the bottom rod, the horizontal rod is connected to the adjusting rod, the connecting rod is connected to the horizontal rod and the bottom rod, and the seat back is disposed on the In the center of the horizontal rod, the two front wheels are disposed on the chair frame, and the two rear wheels are disposed on the seat frame. When the user needs to change the sitting posture, adjusting the actuating member changes the acute angle between the adjusting rod and the bottom rod. The pelvic angle of the user can be rotated forward, thereby transferring the continuous stress concentrated on the user's ischium.

The above two dynamic wheelchairs are used to adjust the dynamic sitting posture to avoid pressure sores, and the continuous pressure causing the user's physical discomfort is transferred to other positions. However, since the dynamic wheelchair requires complicated components and should be equipped with a complicated control system, Dynamic wheelchairs are expensive to manufacture and are not available to every wheelchair user. There are still many users suffering from complications due to being in a wheelchair.

The main purpose of this creation is to provide a wheelchair dynamic sitting system to avoid complications caused by sedentary and expensive manufacturing of wheelchairs.

In order to achieve the foregoing, the present invention provides a wheelchair dynamic sitting system comprising: a seat assembly, the seat assembly comprising a seat frame, a seat, a seat back, two front wheels and two rear wheels, the seat is disposed at the seat The seat back is disposed on the seat, and the angle between the seat back and the seat is greater than 90 degrees and less than 110 degrees, and the two front wheels are disposed on two sides of the front end of the seat frame. The two rear wheels are disposed on two sides of the rear end of the chair frame; an air bag assembly is disposed on the seat assembly, the air bag assembly includes an inflatable pump, a bone adjustment air bag and a lumbar adjustment air bag, the air bag The plunger is disposed on the chair frame, and the femoral adjustment balloon is disposed in a front portion of the seat. The lumbar adjustment balloon is disposed on the seat back. The femoral adjustment balloon and the lumbar adjustment balloon are respectively connected to the inflatable pump by a catheter.

The creation of the wheelchair dynamic sitting posture system adjusts the inflation and deflation of the airbag by the femoral adjustment airbag and the lumbar vertebrae, and adjusts the inflation of the airbag through the femur to raise the thigh of the user. The pressure is transferred to the front end of the leg, or the inflation bulging of the airbag is adjusted through the lumbar vertebra to push the lumbar vertebrae of the user forward to relieve the pressure of the lumbar region, and the continuous stress applied to the lumbar vertebra can be transferred to avoid the user's pressure sore and solve the problem. The problem of complications caused by sedentary users is also simple because the structure of the wheelchair dynamic sitting system is simple, no complicated component combination is required, and a complicated control system is not required, so the wheelchair dynamic sitting system has a low manufacturing cost and can make each Users of wheelchairs can use it.

10‧‧‧Seat components

11‧‧‧ Chair frame

12‧‧‧ seat

13‧‧‧Back of the chair

14‧‧‧ front wheel

15‧‧‧ Rear wheel

16‧‧‧Support frame

20‧‧‧Airbag components

21‧‧‧Inflatable pump

22‧‧‧Femoral adjustment balloon

23‧‧‧Lumbar adjustment airbag

24‧‧‧ catheter

30‧‧‧Control unit

Figure 1 is a side elevational view of one preferred embodiment of the present invention.

Figure 2: A side view of one of the operational states of the present invention.

Fig. 3 is a side view showing the operation of the femoral adjustment airbag in one of the operating state of the wheelchair dynamic sitting posture system.

Figure 4: A side view of the lumbar adjustment of the airbag in one of the operational state of the wheelchair dynamic sitting posture system.

Fig. 5 is a side view showing the simultaneous operation of the femoral and lumbar adjustment airbags in one of the operating state of the wheelchair dynamic sitting posture system.

As shown in FIG. 1 to FIG. 2, a preferred embodiment of the present invention is disclosed. The present invention provides a wheelchair dynamic sitting system comprising a seat assembly 10 and an airbag assembly 20.

The seat assembly 10 includes a seat frame 11 , a seat 12 , a seat back 13 , two front wheels 14 , and two rear wheels 15 . The seat 12 is disposed on the seat frame 11 , and the seat back 13 is disposed on the chair On the seat 12, and the angle between the seat back 13 and the seat 12 is greater than 90 degrees and less than 110 degrees, wherein the best angle The two front wheels 14 are disposed on two sides of the front end of the chair frame 11, and the two rear wheels 15 are disposed on two sides of the rear end of the frame 11. The rear end of the frame 11 is provided with a support frame. 16.

The air bag assembly 20 is disposed on the seat assembly 10, and the air bag assembly 20 includes an inflatable pump 21, a femoral adjustment air bag 22, and a lumbar adjustment air bag 23, and the inflatable pump 21 is disposed on the chair frame 11, the femur is adjusted. The airbag 22 is disposed in front of the seat 12, and the lumbar adjustment airbag 23 is disposed on the seat back 13. The femoral adjustment airbag 22 and the lumbar adjustment airbag 23 are respectively connected to the inflatable pump 21 by a duct 24.

The inflatable pump 21 of the airbag module 20 is electrically connected to a control unit 30. The control unit 30 is disposed on the chair frame 11 and controls the inflatable pump 21 to inflate the femoral adjustment airbag 22 by the control unit 30. And the lumbar adjustment airbag 23 is provided.

The creation of the wheelchair dynamic sitting posture system through the pressure sensing system and the 3D ultrasonic spatial positioning device can compare the effects of the femoral adjustment airbag 22 and the lumbar adjustment airbag 23 with each other or bring the user to use the wheelchair dynamic sitting posture. The influence of the system, the pressure sensing system uses the pressure pad to sense the pressure on the buttocks and back of the user of the wheelchair dynamic sitting system, and the contact area, the average pressure and the peak pressure can be obtained, and the 3D ultrasonic spatial positioning device is ultrasonic. The three-dimensional spatial positioning system locates the angle of the user's spine bending using the wheelchair dynamic sitting posture system, thereby judging the feeling and influence of the femoral adjustment airbag 22 and the lumbar adjustment airbag 23 to the user.

As shown in FIG. 2 and FIG. 3, it is an initial state of the creation of the wheelchair dynamic sitting posture system, and the user controls the initial state of the wheelchair dynamic sitting posture system and controls the inflatable pump 21 of the airbag module 20 by using the control unit 30. The inflatable pump 21 fills the femoral adjustment balloon 22 with air, and the femoral adjustment balloon 22 expands due to the fullness of the air, and the user's thigh rises as the femoral adjustment balloon 22 bulges, and the peak pressure transmitted through the pressure sensing system The change can sense that the femoral adjustment balloon 22 can transfer the peak pressure of the ischial position to the front leg.

As shown in FIG. 2 and FIG. 4, it is an initial state of the creation of the wheelchair dynamic sitting posture system, and the user uses the initial state of the creation of the wheelchair dynamic sitting posture system and controls the control unit 30. The inflatable pump 21 of the airbag module 20, the inflatable pump 21 is filled with the lumbar adjustment airbag 23, and the lumbar adjustment airbag 23 is inflated by the full air, and the user's back is inflated with the lumbar adjustment airbag 23 Pushing the front of the user, through the contact area of the pressure sensing system and the change in the average pressure, it can be inferred that the lumbar adjustment airbag 23 has a significant contact area to the back of the user and relieves the sustained stress on the back.

In addition, through the experiment of the 3D ultrasonic spatial positioning device, it can be inferred that the lumbar adjustment airbag 23 can give a good angular change of the lumbar vertebrae and the pelvis when inflated, and the lumbar adjustment airbag 23 not only affects the lordosis angle of the lumbar vertebra, but also It also promotes the anterior rotation of the pelvis, making the mean and standard deviation of the angle change of the lumbar vertebra more significant, which helps to transfer the persistent stress applied to the lumbar vertebrae, and can relieve the chance of pressure sore.

As shown in FIG. 2 and FIG. 5, the initial state of the creation of the wheelchair dynamic sitting posture system and the operation state of the femoral adjustment airbag 22 and the lumbar adjustment airbag 23 simultaneously inflated and inflated, the user uses the creative wheelchair dynamic sitting posture system, The inflatable pump 21 of the airbag module 20 is controlled to be inflated by the control unit 30, and the femoral adjustment airbag 22 is filled with air at the same time as the lumbar adjustment airbag 23, and the femoral adjustment airbag 22 is inflated to raise the user's thigh, and the lumbar adjustment airbag 23 is inflated. By pushing the lumbar vertebra to the front of the user, the femoral adjustment airbag 22 and the lumbar adjustment airbag 23 can be simultaneously relieved of the user's ischia and lumbar vertebrae.

In the above, the present invention provides a wheelchair dynamic sitting posture system by which the femoral adjustment airbag 22 and the lumbar adjustment airbag 23 are inflated and deflated, and the femoral adjustment airbag 22 is inflated to raise the user's thigh, and the lumbar adjustment airbag 23 bulges to the lumbar vertebrae. Pushing forward, soothing the pressure of the user's ischia and lumbar vertebrae, and transferring the persistent stress applied to the lumbar vertebrae, can avoid the problem of pressure ulcers of the user, and avoid the cumulative complications of the user's lower limb sedentary. In addition, because the wheelchair dynamic sitting system has a simple structure, does not require complicated components and does not require a complicated control system, the wheelchair dynamic sitting system is low in manufacturing cost and can be used by every wheelchair user.

10‧‧‧Seat components

11‧‧‧ Chair frame

12‧‧‧ seat

13‧‧‧Back of the chair

14‧‧‧ front wheel

15‧‧‧ Rear wheel

16‧‧‧Support frame

20‧‧‧Airbag components

21‧‧‧Inflatable pump

22‧‧‧Femoral adjustment balloon

23‧‧‧Lumbar adjustment airbag

24‧‧‧ catheter

30‧‧‧Control unit

Claims (3)

A wheelchair dynamic sitting system includes: a seat assembly including a seat frame, a seat, a seat back, two front wheels and two rear wheels, the seat is disposed on the chair frame, the chair The back seat is disposed on the seat, and the angle between the seat back and the seat is greater than 90 degrees and less than 110 degrees. The two front wheels are disposed on two sides of the front end of the seat frame, and the two rear wheels are disposed on The airbag assembly is disposed on the seat assembly, the airbag assembly includes an inflatable pump, a bone adjustment airbag and a lumbar adjustment airbag, and the inflatable pump is disposed on the seat frame The femoral adjustment airbag is disposed in a front portion of the seat, the lumbar adjustment airbag is disposed on the seat back, and the femoral adjustment airbag and the lumbar adjustment airbag system are respectively connected to the inflatable pump by a conduit, and the inflatable airbag assembly The pump is electrically connected to a control unit, and the control unit is disposed on the chair frame and controls the inflatable pump to inflate the lumbar adjustment balloon and the femoral adjustment balloon with the control unit. The wheelchair dynamic sitting system of claim 1, wherein the rear end of the seat assembly is provided with a support frame. The wheelchair dynamic sitting system of claim 1 or 2, wherein the seat back of the seat assembly and the seat are at an angle of 100 degrees.