Dual-mode obstacle-crossing track transfer assisting device integrated with knee joint pressure sensor

Abstract

The application discloses a dual-mode obstacle-crossing crawler belt transfer auxiliary device integrated with knee joint pressure sensing, and relates to the technical field of medical equipment.The device comprises a knee joint baffle and a fixed backboard, the knee joint baffle and the fixed backboard are both provided with installation plates which are slidably installed, and a telescopic support is fixedly installed between the installation plates; a massage structure is arranged on the fixed backboard, the massage structure comprises an installation housing which is fixedly installed on the fixed backboard, a rotating rod is rotatably connected to the inner wall of the installation housing, the rotating rod penetrates through the installation housing, and a fixed shaft is rotatably connected to the side wall of the installation housing.The device is provided with a fan and a massage structure, so that the device is more comfortable for the old people to use; the device is provided with a movable crawler belt and universal wheels, so that the device can effectively avoid tilting during use, is safer, and prevents the old people from being injured during use; and the device is provided with a thin film pressure sensor and other intelligent devices, so that timely early warning can be performed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing. Background Technology

[0002] With societal development, the elderly population is increasing. As people age, their mobility becomes limited. To improve their mobility, overcome functional impairments, maintain self-care abilities, and enhance their quality of life, an assistive device is needed to aid in their rehabilitation and exercise.

[0003] Existing assistive devices are mainly traditional canes and other instruments. These instruments have limited effectiveness and are inconvenient to use. They cannot provide good assistance, nor can they provide timely warnings. Accidents are likely to occur during use, leading to injuries to the elderly and further exacerbating their health deterioration, which is not conducive to the use of assistive devices. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a dual-mode obstacle-crossing track transfer assist device that integrates knee joint pressure sensing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dual-mode obstacle-crossing tracked transfer assistive device integrating knee joint pressure sensing includes: a knee joint guard and a fixed backing plate. Mounting plates are slidably mounted on both the knee joint guard and the fixed backing plate, and a telescopic bracket is fixedly mounted between the mounting plates. An adjustment structure is also installed on the fixed backing plate. By extending and retracting the telescopic bracket, the user can switch between sitting and standing postures to meet the needs of different rehabilitation stages.

[0007] The massage structure includes a mounting housing fixedly installed on a fixed backrest. A rotating rod is rotatably connected to the inner wall of the mounting housing, and the rotating rod passes through the mounting housing. A fixed shaft is rotatably connected to the side wall of the mounting housing. Fixed rods are slidably connected to the inner walls of both the fixed shaft and the rotating rod, and fixed springs are fixedly installed between the fixed rods and their corresponding inner walls. A rotating plate is fixedly connected to the side walls of both fixed rods, and a massage block is fixedly installed on the rotating plate. The fixed rods and the rotating rods are connected by a first belt drive assembly, and a power structure is installed inside the mounting housing. The power structure drives the rotating rod to rotate, which in turn drives the two fixed rods to rotate synchronously via the first belt drive assembly, causing the massage block on the rotating plate to perform a rolling massage on the user's back. The fixed springs provide axial cushioning to the fixed rods, preventing the massage block from rigidly contacting the user's back and causing discomfort or injury.

[0008] To enable automatic height adjustment of the telescopic support during the massage process to accommodate users of different heights, the present invention further configures the adjustment structure as follows:

[0009] The adjustment structure includes a sliding block slidably mounted on a mounting plate. Both the fixed backplate and the knee joint guard have sliding grooves corresponding to the sliding block. A reciprocating screw is rotatably connected between the inner walls of the sliding grooves on the fixed backplate, passing through the sliding block and mechanically engaging with it. A through groove communicating with the sliding grooves is formed between the mounting housing and the fixed backplate. An adjustment shaft is rotatably connected to the inner wall of the mounting housing via a fixed bracket. A fixed worm gear is fixedly mounted on the adjustment shaft, extending into the inner side of the corresponding sliding groove. A fixed worm wheel, meshing with the fixed worm gear, is fixedly sleeved on the reciprocating screw. A fixed gear is fixedly sleeved on the rotating rod, and an adjustment gear is rotatably sleeved on the adjustment shaft via a one-way bearing, meshing with the fixed gear.

[0010] Its working process is as follows: When the rotating rod rotates forward, the fixed gear drives the adjusting gear to rotate, which in turn drives the adjusting shaft to rotate via the one-way bearing. This, in turn, drives the reciprocating screw to rotate via the fixed worm and fixed worm wheel, causing the sliding block to move up and down along the sliding groove, thereby adjusting the height of the mounting plate and the telescopic bracket. When the massage ends, the motor reverses, the one-way bearing idles, the adjusting shaft does not rotate, and the height of the telescopic bracket is locked. This structure achieves linkage control between massage action and height adjustment, requiring no additional power source.

[0011] To address the issue of back discomfort and heat during prolonged rehabilitation training, and to provide power to the massage structure, this invention configures the power structure as follows:

[0012] The power structure includes a motor fixedly installed on the inner wall of the mounting housing. A rotating rod is fixedly connected to the output end of the motor. The rotating rod and the rotating shaft are connected by a second belt drive assembly. A fan blade is fixedly connected to the side wall of the rotating rod. A ventilation hole is opened on the mounting housing to penetrate its inner wall. The position of the ventilation hole corresponds to the fan blade.

[0013] After the motor starts, the rotating rod simultaneously drives the second belt drive assembly and the fan blades. On one hand, the rotating rod gains rotational power for massage; on the other hand, the rotating fan blades generate airflow, which is blown onto the user's back through the ventilation holes, achieving ventilation and heat dissipation. A single motor performs both massage drive and heat dissipation ventilation functions, resulting in a compact and energy-efficient structure.

[0014] To facilitate operation of the device, especially for elderly users with weakened hand strength, this invention includes an adjustment handle fixedly mounted on the knee joint plate. A control button compatible with the motor is fixedly mounted on the adjustment handle, and an anti-slip sleeve is fitted on the outer side of the handle. Users can easily start, stop, or switch the motor direction using the control button on the adjustment handle. The anti-slip sleeve increases grip stability and prevents hand slippage.

[0015] To enhance massage comfort and ensure reliable transmission of the first belt drive assembly, the present invention makes the following configuration of the massage block and the pulley:

[0016] Each massage block has rounded corners on its sidewalls, and a flexible sleeve is fixedly fitted onto the outer side of each massage block to prevent sharp edges from scratching the user's skin. The flexible sleeve further cushions the massage pressure. The diameter of the rotating wheel on the rotating rod of the first belt drive assembly is larger than the diameter of the rotating wheel on the fixed rod. This diameter difference design ensures that the belt of the first belt drive assembly remains taut during transmission, preventing belt slippage and ensuring that the fixed rod and rotating rod rotate synchronously.

[0017] To address the issues of the device being prone to tipping over and having poor obstacle-crossing ability during use, the present invention makes the following improvements to the mobile support structure:

[0018] The bottom end of the fixed support plate is rotatably mounted with casters via shock absorber rods. The bottom end of the knee joint guard plate is fixedly mounted with a movable track. A buffer shell is fitted over the outer side of the movable track, and the buffer shell is fixedly connected to the knee joint guard plate. The movable track has a large ground contact area and obstacle-crossing ability, enabling it to cross obstacles such as thresholds and carpet edges, while effectively preventing the device from tipping over. The casters, in conjunction with the movable track, allow for flexible steering. The shock absorber rods absorb ground impacts during travel, and the buffer shell protects the movable track from impacts with hard objects.

[0019] To provide a comfortable seat cushion when the user is in a seated position, and to enable the seat cushion layer to automatically extend and retract with the telescopic support, the present invention makes the following settings:

[0020] A storage roller is rotatably mounted between the inner wall of the mounting housing connected to the fixed back plate. A seat cushion layer is fixedly wound on the storage roller. The seat cushion layer is fixedly connected to the knee joint baffle and covers the outer side of the telescopic bracket. A torsion spring is fixedly mounted between the storage roller and the inner wall of the mounting housing.

[0021] When the telescopic support is extended (seated mode), the knee joint guard moves away from the fixed backrest, and the seat cushion is pulled out from the storage roller and laid flat above the telescopic support to form a support surface. When the telescopic support is retracted (standing mode), the torsion spring drives the storage roller to rotate in the opposite direction, automatically retracting and winding the seat cushion. This design achieves automatic storage and unfolding of the seat cushion, eliminating the need for manual arrangement.

[0022] To enable knee joint stress monitoring and early warning, and to prevent wear and tear caused by unintentional joint overload, this invention incorporates a built-in thin-film pressure sensor fixedly installed within the knee joint guard. This sensor detects the vertical impact force exerted by the user's knee joint on the knee joint guard in real time. When the detected value exceeds a preset threshold, an early warning is issued via an external alarm or display screen, achieving closed-loop management of "monitoring-early warning-data traceability" and reducing the risk of misoperation during rehabilitation.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. Dual-mode obstacle crossing and anti-rollover stable walking

[0025] By incorporating a movable track at the bottom of the knee joint support plate and omnidirectional wheels at the bottom of the fixed backrest, a dual-mode support structure of "track + omnidirectional wheels" is achieved. The movable track has a large ground contact area and excellent obstacle-crossing ability, easily traversing obstacles such as thresholds and carpet edges, significantly reducing the risk of tipping over during use or movement; the omnidirectional wheels ensure steering flexibility. This structure solves the technical problems of traditional rehabilitation assistive devices (such as canes) such as poor stability, weak obstacle-crossing ability, and the tendency for elderly people to fall and get injured.

[0026] 2. Real-time monitoring and early warning of vertical impact force on the knee joint

[0027] An internal thin-film pressure sensor is fixedly installed inside the knee joint guard to monitor the vertical impact force applied to the user's knee joint in real time. When the detected value exceeds a preset safety threshold, the system can issue an early warning in a timely manner, effectively preventing the risk of joint wear caused by "unintentional joint overload". This achieves closed-loop management of "monitoring-early warning-data traceability", improves the safety of rehabilitation training, and provides data support for rehabilitation status assessment.

[0028] 3. Integrated massage and ventilation / heat dissipation functions

[0029] A single motor simultaneously drives both the rotating rod and the fan blades: on one hand, the motor drives the rotating rod to rotate via a second belt drive assembly, which in turn drives the fixed rod and massage block to rotate via a first belt drive assembly, providing a rolling massage to the user's back; on the other hand, the fan blades on the rotating rod simultaneously generate airflow, which is blown onto the user's back through ventilation holes. This structure achieves both massage and heat dissipation with a single power source, solving the problem of back stuffiness and discomfort during prolonged use. It is compact, energy-efficient, and highly effective.

[0030] 4. Massage and height adjustment linked control

[0031] The one-way bearing and worm gear assembly in the adjustment structure are coupled with the massage transmission system. When the rotating rod rotates forward, it drives the adjustment shaft and worm gear to rotate through the fixed gear, adjusting gear, and one-way bearing, which in turn drives the reciprocating screw to move the sliding block up and down, automatically adjusting the height of the telescopic bracket to accommodate users of different heights. When a fixed height is required, changing the motor direction will allow the one-way bearing to idle, stopping the height adjustment. This design requires no additional drive source and completes height adjustment synchronously during the massage process, making it easy to operate.

[0032] 5. Dual sitting / standing modes and automatic seat cushion retraction.

[0033] The telescopic support frame can be extended or retracted, allowing the device to freely switch between sitting rehabilitation training and standing / walking assistance modes. Simultaneously, one end of the seat cushion is fixed to the knee joint guard, while the other end is wound around a storage roller with a torsion spring. When the telescopic support frame is extended (sitting mode), the seat cushion automatically lays flat to form a support surface; when the telescopic support frame is retracted (standing mode), the torsion spring drives the storage roller to automatically retract the seat cushion. This achieves automatic retraction and extension of the seat cushion, eliminating the need for manual adjustment and providing a better user experience.

[0034] In summary, this invention improves mobility assistance for the elderly and rehabilitation populations through six dimensions: anti-rollover and obstacle crossing, knee joint overload warning, integrated massage and heat dissipation, automatic height adjustment, dual-mode switching, and seat cushion retraction. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of a dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing proposed in this invention.

[0036] Figure 2 This is a three-dimensional structural diagram of the mounting housing of a dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing proposed in this invention.

[0037] Figure 3This is a side-view three-dimensional structural diagram of the mounting housing of a dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing proposed in this invention.

[0038] Figure 4 This is a three-dimensional structural diagram of the adjustment structure of a dual-mode obstacle-crossing track transfer auxiliary device integrating knee joint pressure sensing proposed in this invention.

[0039] In the diagram: 1. Knee joint guard plate, 2. Fixed backrest plate, 3. Mounting plate, 4. Casters, 5. Mounting housing, 6. Moving track, 7. Adjustment handle, 8. Adjustment structure, 81. Adjustment shaft, 82. Fixed worm gear, 83. Fixed worm wheel, 84. Fixed gear, 85. Adjustment gear, 9. Telescopic bracket, 10. Seat cushion, 11. Rotating plate, 12. Massage block, 13. Motor, 14. Rotating rod, 15. Fan blade, 16. Fixed shaft, 17. Fixed rod, 18. First belt drive assembly, 19. Sliding groove, 20. Sliding block, 21. Rotating rod, 22. Second belt drive assembly, 23. Reciprocating screw. Detailed Implementation

[0040] Reference Figures 1-4 A dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing, comprising:

[0041] The knee joint guard plate 1 and the fixed back plate 2 are both slidably mounted on the knee joint guard plate 1 and the fixed back plate 2. A telescopic bracket 9 is fixedly mounted between the mounting plates 3. When the telescopic bracket 9 is pulled open, the elderly can sit on the device to carry out rehabilitation training. When the telescopic bracket 9 is folded up, the elderly can stand to carry out rehabilitation training, making the device more flexible to use. An adjustment structure 8 is also installed on the fixed back plate 2.

[0042] The massage structure includes a mounting housing 5 fixedly mounted on a fixed back plate 2. A rotating rod 21 is rotatably connected to the inner wall of the mounting housing 5, and the rotating rod 21 passes through the mounting housing 5. A fixed shaft 16 is rotatably connected to the side wall of the mounting housing 5. Fixed rods 17 are slidably connected to the inner walls of the fixed shaft 16 and the rotating rod 21. Fixed springs are fixedly installed between the fixed rods 17 and the corresponding inner walls of the fixed shaft 16 and the rotating rod 21. The fixed springs can provide cushioning to prevent damage to the device. A rotating plate 11 is fixedly connected to the side wall of the fixed rod 17. A rotating plate 11 massage block 12 is fixedly mounted on the rotating plate 11. The fixed rod 17 and the rotating rod 21 are connected by a first belt drive assembly 18. A power structure is installed inside the mounting housing 5.

[0043] Under the action of the power structure, the rotating rod 21 rotates, and under the action of the second belt drive structure, the fixed rod 17 rotates, which drives the rotating plate 11 fixedly installed on the fixed rod 17 and the rotating rod 21 to rotate, which also drives the massage block 12 fixedly installed on the rotating plate 11 to rotate, so as to massage the back of the elderly and make the elderly feel comfortable during the training process.

[0044] The adjustment structure 8 includes a sliding block 20 slidably mounted on the mounting plate 3. Both the fixed support plate 2 and the knee joint guard plate 1 have sliding grooves 19 corresponding to the sliding block 20. A reciprocating screw 23 is rotatably connected between the inner walls of the sliding grooves 19 on the fixed support plate 2. The reciprocating screw 23 passes through the sliding block 20 and mechanically engages with it. A through groove communicating with the sliding grooves 19 is formed between the mounting housing 5 and the fixed support plate 2. An adjustment shaft 81 is rotatably connected to the inner wall of the mounting housing 5 via a fixed bracket. A fixed worm gear 82 is fixedly mounted on the adjustment shaft 81. The fixed worm 82 extends into the inner side of the corresponding sliding groove 19. A fixed worm wheel 83 that meshes with the fixed worm 82 is fixedly sleeved on the reciprocating screw 23. A fixed gear 84 is fixedly sleeved on the rotating rod 21. An adjusting gear 85 is rotatably sleeved on the adjusting shaft 81 through a one-way bearing. The one-way bearing makes the adjusting gear 85 only able to make the adjusting shaft 81 rotate in one direction. That is, after changing the rotation direction of the output end of the motor 13, the adjusting shaft 81 can be stopped from rotating, thereby fixing the position of the telescopic bracket 9. The adjusting gear 85 meshes with the fixed gear 84.

[0045] When the rotating rod 21 rotates, the fixed gear 84, which is fixedly sleeved on the rotating rod 21, rotates accordingly, causing the adjusting gear 85, which meshes with the fixed gear 84, to rotate together. Under the action of the one-way bearing, the adjusting shaft 81 rotates, causing the fixed worm 82, which is fixedly connected to the adjusting shaft 81, to rotate accordingly, causing the fixed worm wheel 83, which meshes with the fixed worm 82, to rotate together, driving the reciprocating screw 23, which is fixedly connected to the fixed worm wheel 83, to rotate. When the reciprocating screw 23 rotates, the sliding block 20, which is mechanically engaged with the reciprocating screw 23, will move up and down, thereby adjusting the height of the sliding block 20 and adjusting the height of the telescopic bracket so that elderly people of different sizes can use it.

[0046] The power structure includes a motor 13 fixedly installed on the inner wall of the mounting housing 5. A rotating rod 14 is fixedly connected to the output end of the motor 13. The rotating rod 14 and the rotating rod 21 are connected by a second belt drive assembly 22. A fan blade 15 is fixedly connected to the side wall of the rotating rod 14. A ventilation hole is opened on the mounting housing 5 to penetrate its inner wall. The position of the ventilation hole corresponds to the fan blade 15.

[0047] After the motor 13 starts, its output end drives the rotating rod 14 to rotate. Under the action of the second belt drive assembly 22, the rotating rod 21 rotates together with the rotating rod 14. At the same time, when the rotating rod 14 rotates, the fan blade 15 will rotate together with the rotating rod 14, thereby generating wind and making the elderly feel comfortable.

[0048] An adjustment handle 7 is fixedly installed on the knee joint guard plate 1. A control button matching the motor 13 is fixedly installed on the adjustment handle 7. The outer side of the adjustment handle 7 is covered with an anti-slip sleeve. The motor 13 can be controlled by the control button to adjust the start and stop of the motor 13 and the direction of rotation of the motor. At the same time, a thumb drive unit is installed on the adjustment handle 7. Through the TrackPoint force feedback principle, it meets the precise control needs of people with upper limb function degeneration.

[0049] Each massage block 12 has rounded corners on its sidewalls, and each massage block 12 has a flexible sleeve fixedly fitted on its outer side, making the massage of the massage block 12 more gentle and comfortable, and avoiding harm to the elderly. The diameter of the rotating wheel on the rotating rod 21 of the first belt drive assembly 18 is larger than the diameter of the rotating wheel on the fixed rod 17, so the belt of the first belt drive assembly 18 can be tightened to carry out transmission.

[0050] The bottom end of the fixed back plate 2 is rotatably mounted with casters 4 via shock absorbers. The bottom end of the knee joint baffle 1 is fixedly mounted with a moving track 6. The outer side of the moving track 6 is covered with a buffer shell, and the buffer shell is fixedly connected to the knee joint baffle 1. The moving track 6 makes the device more stable when moving, and prevents the device from tipping over during use, which could cause injury to the elderly. The buffer shell can protect the moving track 6.

[0051] A storage roller is rotatably mounted between the inner wall of the mounting housing 5 connected to the fixed back plate 2. A seat cushion layer 10 is fixedly wound on the storage roller. The seat cushion layer 10 is an interconnected sheet structure, so it can be stored on the storage roller and can also be used as a seat cushion. The seat cushion layer 10 is fixedly connected to the knee joint baffle 1 and covers the outside of the telescopic bracket 9. A torsion spring is fixedly mounted between the storage roller and the inner wall of the mounting housing 5. As the telescopic bracket 9 extends and retracts, the seat cushion layer 10 will move from the storage roller, causing the torsion spring to deform. The elastic force of the torsion spring can cause the seat cushion layer 10 to be stored back on the storage roller.

[0052] The knee joint guard plate 1 is internally fixed with a built-in thin-film pressure sensor, which can monitor the vertical impact force on the knee joint in real time, solve the wear risk caused by "unintentional joint overload", and thus realize the closed-loop management of "monitoring-early warning-data traceability" and reduce the risk of misoperation.

[0053] In this invention, when the device is in use, the telescopic support 9 is extended, allowing the elderly person to sit on the device for rehabilitation training. When the telescopic support 9 is retracted, the elderly person can stand for rehabilitation training, making the device more flexible to use. When the elderly person sits down for training, the motor 13 is started. After the motor 13 starts, its output end drives the rotating rod 14 to rotate. Under the action of the second belt drive assembly 22, the rotating rod 21 rotates together with the rotating rod 14, driving the fixed gear 84 fixedly sleeved on the rotating rod 21 to rotate accordingly. This causes the adjusting gear 85, which meshes with the fixed gear 84, to rotate as well. Under the action of the one-way bearing, the adjusting shaft 81 rotates, causing the fixed worm gear 82, which is fixedly connected to the adjusting shaft 81, to rotate accordingly, causing the fixed worm wheel 83, which meshes with the fixed worm gear 82, to rotate as well. The rotation of the rotating rod 14 causes the reciprocating screw 23, which is fixedly connected to the fixed worm gear 83, to rotate. When the reciprocating screw 23 rotates, the sliding block 20, which is mechanically engaged with the reciprocating screw 23, will move up and down, thereby adjusting the height of the sliding block 20 and adjusting the height of the telescopic bracket so that elderly people of different body types can use it. Moreover, under the action of the second belt drive structure, the fixed rod 17 rotates with the rotating rod 21, causing the rotating plate 11, which is fixedly installed on the fixed rod 17 and the rotating rod 21, to rotate. This causes the massage block 12, which is fixedly installed on the rotating plate 11, to also rotate, which can massage the back of the elderly and make them feel comfortable during the training process. At the same time, when the rotating rod 14 rotates, the fan blade 15 will rotate with the rotating rod 14, thereby generating wind and making the elderly feel comfortable.

Claims

1. A dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing, characterized in that, include: A knee joint guard plate (1) and a fixed back plate (2) are provided. Mounting plates (3) are slidably installed on both the knee joint guard plate (1) and the fixed back plate (2). A telescopic bracket (9) is fixedly installed between the mounting plates (3). An adjustment structure (8) is also installed on the fixed back plate (2). The massage structure includes a mounting shell (5) fixedly mounted on a fixed back plate (2). A rotating rod (21) is rotatably connected to the inner wall of the mounting shell (5). The rotating rod (21) passes through the mounting shell (5). A fixed shaft (16) is rotatably connected to the side wall of the mounting shell (5). A fixed rod (17) is slidably connected to the inner wall of both the fixed shaft (16) and the rotating rod (21). A fixed spring is fixedly installed between the fixed rod (17) and the inner wall of the corresponding fixed shaft (16) and rotating rod (21). A rotating plate (11) is fixedly connected to the side wall of the fixed rod (17). A massage block (12) is fixedly installed on the rotating plate (11). The fixed rod (17) and the rotating rod (21) are connected by a first belt drive assembly (18). A power structure is installed inside the mounting shell (5).

2. The dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing according to claim 1, characterized in that, The adjustment structure (8) includes a sliding block (20) slidably mounted on the mounting plate (3). The fixed backing plate (2) and the knee joint baffle (1) both have sliding grooves (19) corresponding to the sliding block (20). A reciprocating screw (23) is rotatably connected between the inner walls of the sliding groove (19) on the fixed backing plate (2). The reciprocating screw (23) passes through the sliding block (20) and mechanically engages with it. A through groove communicating with the sliding groove (19) is formed between the mounting housing (5) and the fixed backing plate (2). The inner wall of the device is rotatably connected to an adjusting shaft (81) via a fixed bracket. A fixed worm (82) is fixedly installed on the adjusting shaft (81). The fixed worm (82) extends to the inner side of the corresponding sliding groove (19). A fixed worm wheel (83) that meshes with the fixed worm (82) is fixedly sleeved on the reciprocating screw (23). A fixed gear (84) is fixedly sleeved on the rotating rod (21). An adjusting gear (85) is rotatably sleeved on the adjusting shaft (81) via a one-way bearing, and the adjusting gear (85) meshes with the fixed gear (84).

3. The dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing according to claim 1, characterized in that, The power structure includes a motor (13) fixedly installed on the inner wall of the mounting housing (5). The output end of the motor (13) is fixedly connected to a rotating rod (14). The rotating rod (14) and the rotating rod (21) are connected by a second belt drive assembly (22). The side wall of the rotating rod (14) is fixedly connected to a fan blade (15). The mounting housing (5) has a ventilation hole that penetrates its inner wall. The position of the ventilation hole corresponds to that of the fan blade (15).

4. The dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing according to claim 3, characterized in that, An adjustment handle (7) is fixedly installed on the knee joint guard plate (1). A control button matching the motor (13) is fixedly installed on the adjustment handle (7). An anti-slip sleeve is fitted on the outside of the adjustment handle (7).

5. The dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing according to claim 1, characterized in that, Each massage block (12) has rounded corners on its sidewalls, and each massage block (12) has a flexible sleeve fixedly fitted on its outer side. The diameter of the rotating wheel of the first belt drive assembly (18) on the rotating rod (21) is larger than the diameter of the rotating wheel on the fixed rod (17).

6. The dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing according to claim 1, characterized in that, The bottom end of the fixed back plate (2) is rotatably mounted with a caster wheel (4) via a shock absorber rod. The bottom end of the knee joint baffle (1) is fixedly mounted with a moving track (6). The outer side of the moving track (6) is covered with a buffer shell, and the buffer shell is fixedly connected to the knee joint baffle (1).

7. The dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing according to claim 1, characterized in that, A storage roller is rotatably mounted between the inner wall of the mounting housing (5) connected to the fixed back plate (2), a seat cushion layer (10) is fixedly wound on the storage roller, the seat cushion layer (10) is fixedly connected to the knee joint baffle (1), and the seat cushion layer (10) covers the outer side of the telescopic bracket (9), and a torsion spring is fixedly mounted between the storage roller and the inner wall of the mounting housing (5).

8. The dual-mode obstacle-crossing tracked transfer assist device integrating knee joint pressure sensing according to claim 1, characterized in that, The knee joint guard (1) is internally fixed with a built-in thin-film pressure sensor.

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