Foot drop auxiliary training device
By designing a foot sag assisted training device including motor, gear set and traction members, the problem that the prior art cannot effectively exercise the dorsiflexion function of stroke patients is solved, and effective assisting and walking gait for foot sag patients is achieved. recovery.
Patent Information
- Application Number
- CN202420558075.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-03-21
- Filing Date
- 2024-03-21
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-03-21
AI Technical Summary
The prior art is difficult to effectively assist stroke patients to restore normal walking gait, especially in the case of foot sagging. The existing equipment cannot effectively exercise the dorsiflexion function of the foot, resulting in insufficient muscle relaxation and exercise.
A foot sag assisted training device is designed including a housing, an elastic support, an electric motor, a ship switch, a gear set and a traction member. The gear set and traction members are driven by the motor to achieve traction and dorsiflexion movements on the foot, simulating the dorsiflexion movements during normal walking.
Effectively assist patients with foot sagging to complete normal foot dorsiflexion during walking, promote the recovery of foot dorsiflexion function, and help patients restore normal walking cycle and gait.
Smart Images
Figure CN222426572U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of sports training machinery, in particular to a foot drop auxiliary training device. Background Art
[0002] Stroke is a common and frequently occurring disease that endangers human health. Although medical advances have improved the survival rate of patients, its high disability rate still brings great burdens to patients' families and society. Poor walking ability is the main problem of hemiplegic patients after stroke. Whether hemiplegic patients have good walking ability is directly related to their ability to live independently and their quality of life. Therefore, in the late stage of stroke rehabilitation, the prognosis and protection stage of related muscles related to dorsiflexion of the foot during the walking cycle, and the functional training and recovery training stage of patients with dorsiflexion functional problems and dorsiflexion difficulties caused by other reasons, improving walking ability is the most important rehabilitation goal. The following stroke prognosis-assisted walking-related devices are currently sold in the domestic market: (1) Stroke correction shoes (hemiplegia rehabilitation, foot varus and valgus correctors, foot drop correctors). This type of device mainly fixes the ankle to keep the ankle in the dorsiflexed position when the patient walks, thereby limiting foot drop and achieving the function of correcting the walking state of the foot. However, from a technical perspective, such restrictions will prevent the dorsiflexion muscles of the foot from relaxing and getting the proper exercise. The foot and ankle joint will also not have a complete and normal foot cycle change pattern when walking. (2) Stroke walking aid leg lifter (exoskeleton assisted walker, walking aid) This type of device mainly makes up for the hip flexion (leg lifting) function of the rectus femoris and other muscles of hemiplegic stroke patients, but cannot provide walking training for foot drop. Therefore, based on the above technical gaps, there is a need for a device to restore normal walking gait for patients in the prognosis and protection stage of stroke; for some elderly patients with sarcopenia, to help them restore the strength of the dorsiflexion muscles such as the tibialis anterior; and for other situations where devices are needed to assist in normal dorsiflexion of the foot. Utility Model Content
[0003] In order to solve the above problems, the purpose of the utility model is to provide a foot drop auxiliary training device, which can effectively assist foot drop patients to complete normal dorsiflexion of the foot when walking, and promote the recovery of the normal state of the ankle joint during the walking cycle.
[0004] In order to achieve the above objectives, the technical solution adopted by the utility model is:
[0005] A foot drop auxiliary training device comprises a shell, the interior of which is hollow; an elastic support member, a motor, a rocker switch, a gear set and a traction member; the elastic support member is mounted on the inner bottom surface of the shell; the motor is mounted on the elastic support member; the rocker switch is mounted on the inner wall of the shell for turning the motor on or off; a spherical contact is arranged on one side of the motor, and the spherical contact contacts the rocker switch; the input end of the gear set is connected to the output end of the motor; the traction member is arranged in two groups; the gear set is symmetrically provided with two output ends, one end of the two groups of traction members is respectively connected to the two output ends of the gear set, and the other end is connected to the foot.
[0006] As a preferred embodiment, the elastic support member includes four springs installed in the housing and corresponding to the four corners of the lower surface of the motor.
[0007] As a preferred embodiment, the traction member includes a shaft cylinder and a fixing device; the shaft cylinder is installed inside the shell; and an extension hole is opened on the lower surface of the shell, one end of the fixing device is wrapped around the shaft cylinder, and the other end passes through the extension hole to connect with the foot.
[0008] As a preferred implementation scheme, the gear set includes a first gear and a second gear that are symmetrically arranged; the first gear is connected to the output end of the motor, and the second gear is meshed with the first gear; the first gear is coaxially fixed with a first transmission gear, the second gear is coaxially fixed with a second transmission gear, the first transmission gear and the second transmission gear are respectively meshed with a third transmission gear, and the third transmission gear is coaxially fixed with the traction member.
[0009] As a preferred implementation scheme, a strap is provided on the outer surface of the shell; and an adjustment buckle is provided on the strap.
[0010] As a preferred implementation scheme, the shaft cylinder includes a movable part and a fixed part arranged at both ends of the movable part; the end face of the movable part is provided with an elastic protrusion, and the inner surface of the fixed part is provided with an inclined boss; the high end of the inclined surface of the boss is located in the direction in which the motor drives the shaft cylinder to rotate.
[0011] Beneficial effects of the utility model:
[0012] The utility model provides a foot drop auxiliary training device, wherein one end of a traction member is connected to a foot, and the foot is pulled by a motor drive to achieve dorsiflexion of the foot; the foot of the foot drop patient naturally droops, and after the wearing is completed, the traction member drives the gear group, and the force acts on the motor. The motor is arranged on an elastic support member, and the elastic support member is not sufficient to support the motor and the force acting on the motor, so the motor is displaced, and the spherical contact on the side of the motor acts on the boat-shaped switch, and the motor runs, drives the gear group to run, and finally drives the traction member to run, so that the foot dorsiflexes. At this time, the patient's foot completely lands when walking, and there is no force on the spring support member at this time, so the spring support member is reset, and the spherical contact on the motor drives the boat-shaped switch to close, and the motor stops running. When the leg is subsequently raised, the patient's foot naturally droops, and the motor is driven to start again, and the previous steps are repeated. When the walking cycle of the affected foot is in the whole foot landing and back kicking, the active muscle of this action is the dorsiflexor muscle group of the posterior side of the calf, and the dorsiflexor muscle group of the foot is the antagonist muscle, so as to achieve better stimulation of the dorsiflexion function of the patient's foot. In general, the utility model can effectively assist patients with foot drop to complete normal dorsiflexion of the foot when walking, and promote the recovery of dorsiflexion function of the foot. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a left view of the device structure of the utility model;
[0014] Figure 2 This is a front view of the device structure of the utility model;
[0015] Figure 3 It is a top view of the device structure of the utility model;
[0016] Figure 4 This is a schematic diagram of the use status of the device of Example 3 of the utility model;
[0017] Figure 5 This is a front view of the shaft tube structure in Example 2 of the utility model;
[0018] Figure 6 It is a left view of the shaft tube structure in Example 2 of the utility model.
[0019] In the figure: 1. housing; 2. elastic support member; 3. motor; 4. rocker switch; 5. gear set; 51. first gear; 52. second gear; 53. second transmission gear; 54. first transmission gear; 55. third transmission gear; 6. traction member; 61. shaft cylinder; 611. movable part; 612. fixed part; 62. fixing device; 7. spherical contact; 8. extension hole; 9. strap; 10. adjustment buckle; 11. elastic protrusion; 12. boss. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described below in conjunction with the accompanying drawings. In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0021] Example 1
[0022] like Figure 1-3 As shown, this embodiment provides a foot drop auxiliary training device, including a shell 1, the interior of the shell 1 is hollow; it also includes an elastic support member 2, a motor 3, a rocker switch 4, a gear set 5 and a traction member 6; the elastic support member 2 is installed on the inner bottom surface of the shell 1; the motor 3 is installed on the elastic support member 2; the rocker switch 4 is installed on the inner wall of the shell 1 for turning on or off the motor 3; a spherical contact 7 is provided on one side of the motor 3, and the spherical contact 7 is in contact with the rocker switch 4; the input end of the gear set 5 is connected to the output end of the motor 3; the traction member 6 is provided with two groups; the gear set 5 is symmetrically provided with two output ends, one end of the two groups of traction members 6 is respectively connected to the two output ends of the gear set 5, and the other end is connected to the foot.
[0023] A foot drop auxiliary training device, which is set on the patient's leg when in use; a hollow shell 1 provides an installation base for other structures, and a battery is set in the shell 1 as a power source for a motor 3; an elastic support 2 is used to support the motor 3. It is worth noting that the supporting force of the spring support is sufficient to support the motor 3, but when other forces act on the spring support, the spring support will deform and drive the motor 3 to move. The spherical contact 7 on the side of the motor 3 contacts the rocker switch 4. When the motor 3 moves, the spherical contact 7 will act on the rocker switch 4 to turn on or off the motor 3. One end of the traction member 6 is connected to the foot, and the motor 3 drives the foot to achieve traction and dorsiflexion of the foot; the foot of the foot drop patient naturally droops, and after wearing, the traction member 6 drives the gear set 5, and the force acts on the motor 3. The motor 3 is arranged on the elastic support 2, and the elastic support 2 is not enough to support the motor 3 and the force acting on the motor 3, so the motor 3 is displaced, and the spherical contact 7 on the side of the motor 3 acts on the boat switch 4, and the motor 3 runs, driving the gear set 5 to run, and finally driving the traction member 6 to run, so that the foot undergoes dorsiflexion movement, and the patient's foot completely lands when walking at this time, and there is no force on the spring support at this time, so the spring support is reset, and the spherical contact 7 on the motor 3 drives the boat switch 4 to close, and the motor 3 stops running. When the leg is subsequently raised, the patient's foot naturally droops, and the motor 3 is driven to start again, and the previous steps are repeated. When the walking cycle of the affected foot is in the whole foot landing and back pedaling, the active muscle of this action is the dorsiflexor muscle group of the posterior side of the calf, and the dorsiflexor muscle group of the foot is the antagonist muscle, which can achieve better stimulation of the patient's dorsiflexion function of the foot. When the patient stands still, the motor 3 is in a power-off state, saving energy and reducing safety hazards. In general, the utility model can effectively assist patients with foot drop to complete normal dorsiflexion of the foot when walking, and promote the recovery of dorsiflexion function of the foot.
[0024] Example 2
[0025] like Figure 1-6 As shown, this embodiment is developed on the basis of the above embodiment. Specifically, this embodiment provides a foot drop auxiliary training device, wherein the elastic support member 2 includes four springs installed in the housing 1 and corresponding to the four corners of the lower surface of the motor 3. The four springs are evenly arranged to provide even support force for the motor 3.
[0026] As a preferred embodiment, the traction member 6 includes a shaft cylinder 61 and a fixing device 62; the shaft cylinder 61 is installed inside the housing 1; and the lower surface of the housing 1 is provided with an extension hole 8, one end of the fixing device 62 is wound around the shaft cylinder 61, and the other end passes through the extension hole 8 and is connected to the foot. When the device is in use, the shaft cylinder 61 is driven by the fixing device 62, and then the gear set 5 is driven, and then acts on the motor 3, and the traction force acts on the spring support member, causing the spring support member to deform and drive the motor 3 to move, thereby turning on the boat-shaped switch 4, and the motor 3 runs. Preferably, the fixing device 62 is made of soft and deformable leather and textile as the main material, respectively wrapping the tibiofibular joint and the sole of the foot covering the navicular bone, and connected with Velcro. The fixing device 62 is connected to the power device shaft cylinder 61 fixed at the tibial tuberosity at the distal end of the dorsum of the foot with a skin-friendly material.
[0027] As a preferred embodiment, the gear set 5 includes a first gear 51 and a second gear 52 which are symmetrically arranged; the first gear 51 is connected to the output end of the motor 3, and the second gear 52 is meshed with the first gear 51; the first gear 51 is coaxially fixed with a first transmission gear 54, and the second gear 52 is coaxially fixed with a second transmission gear 53, and the first transmission gear 54 and the second transmission gear 53 are respectively meshed with a third transmission gear 55, and the third transmission gear 55 is coaxially fixed with the traction member 6. After the motor 3 is started, the motor 3 drives the first gear 51 to rotate, and the first gear 51 transmits the rotation to the second gear 52 by meshing with the second gear 52, and the first gear 51 and the second gear 52 are respectively coaxially fixed with the first transmission gear 54 and the second transmission gear 53, so the first transmission gear 54 and the second transmission gear 53 rotate with the first gear 51 and the second gear 52 respectively, and the first transmission gear 54 and the second transmission gear 53 are respectively meshed with the third transmission gear 55 to transmit the rotation to the third transmission gear 55, and the third transmission gear 55 is coaxially fixed with the traction member 6 to transmit the rotation to the traction member 6. The power is transmitted by gear transmission, which has a simple structure and can effectively transmit the force; the first transmission gear 54, the second transmission gear 53 and the third transmission gear 55 are preferably bevel gears.
[0028] As a preferred embodiment, the outer surface of the housing 1 is provided with a strap 9, and the strap 9 is provided with an adjustment buckle 10. The device is tied to a suitable position of the patient's leg through the strap 9, and the adjustment buckle 10 can adjust the tightness of the device.
[0029] As a preferred embodiment, the shaft cylinder 61 includes a movable part 611 and a fixed part 612 arranged at both ends of the movable part 611; the end surface of the movable part 611 is provided with an elastic protrusion 11, and the inner surface of the fixed part 612 is provided with an inclined boss 12; the inclined high end of the boss 12 is located in the direction in which the motor 3 drives the shaft cylinder 61 to rotate. When the motor 3 drives the shaft cylinder 61 to rotate, the high end of the inclined boss 12 blocks the passage of the elastic protrusion 11. The elastic protrusion 11 is limited by the inclined boss 12 to prevent the motor 3 from rotating and driving the shaft cylinder 61 to cause the fixing device 62 to infinitely stretch the foot when the rocker switch 4 fails; when the motor 3 is turned off and the foot droops naturally, the rotation direction of the shaft cylinder 61 is opposite to that when the motor 3 is running. At this time, when the elastic protrusion 11 contacts the inclined boss 12, the elastic protrusion 11 is elastic and can run from the lower end to the higher end of the inclined boss 12, and will not hinder the natural drooping of the foot. It is worth noting that, since the range of motion of the human foot dorsiflexion is very short, usually smaller than the circumference of the shaft cylinder 61, when the motor 3 and the rocker switch 4 operate normally, the non-contact between the inclined boss 12 and the elastic protrusion 11 will not hinder the normal operation of the shaft cylinder 61. In the case of failure of the rocker switch 4, the motor 3 drives the shaft cylinder 61 to rotate. When the elastic protrusion 11 contacts the inclined boss 12, the high end of the inclined boss 12 limits the elastic protrusion 11 for position limiting protection. The rotation angle of the shaft cylinder 61 is limited by the elastic protrusion 11 and the inclined boss 12, so as to limit the distance that the fixing device 62 drives the foot to move up or down, and realize motion protection.
[0030] Example 3
[0031] This embodiment is developed on the basis of the above embodiment. Specifically, this embodiment provides a foot drop auxiliary training device with the following working process:
[0032] like Figure 1-6As shown, when foot drop occurs, the foot drives the fixing device 62 to move downward. At this time, the spring cannot provide sufficient elastic force. At this time, the fixing device 62 drives the motor 3 and the gear set 5 to move downward, and the spherical contact 7 on the side of the downward-moving motor 3 toggles the rocker switch 4 to energize, driving the gear set 5 to run, and then the shaft cylinder 61 rotates to drive the fixing device 62 to move upward to cause dorsiflexion of the foot. When the dorsiflexion of the foot reaches a normal amplitude, the motor shaft rotates to a specific position, and the fixing device 62 moves upward by about 2 to 5 cm. The patient's sole lands steadily and firmly. At this time, the reaction force of the elastic force of the spring pushes the motor 3 to move upward due to the lack of foot drop force, and the spherical contact 7 on the side of the motor 3 triggers the rocker switch. 4 Turn off the power supply to cut off the power to the motor 3. When the walking cycle of the affected foot is in the stage of full foot landing and pushing back, the active muscle of this action is the dorsiflexor muscles of the posterior calf, and the dorsiflexor muscles of the foot are the antagonist muscles, which can better stimulate the patient's dorsiflexion function. When the patient flexes the hip and lifts the leg, the patient's affected side naturally drops the foot due to insufficient dorsiflexion function of the tibialis anterior muscle and other muscles. Generally, the lifting rope is pulled down 2 to 5 cm. At this time, the spring resets and drives the motor 3 to move up to turn on the boat-shaped switch 4, and the motor 3 starts. The device repeats the above process during the patient's walking cycle. It is worth mentioning that in this design, when the patient stands still, the motor 3 is in a power-off state, which saves energy, extends the use time, and reduces safety hazards.
[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A foot drop auxiliary training device, characterized in that: The invention comprises a shell (1), the interior of which is hollow; an elastic support member (2), a motor (3), a rocker switch (4), a gear set (5) and a traction member (6); the elastic support member (2) is mounted on the inner bottom surface of the shell (1); the motor (3) is mounted on the elastic support member (2); the rocker switch (4) is mounted on the inner wall of the shell (1) for turning on or off the motor (3); a spherical contact (7) is arranged on one side of the motor (3), and the spherical contact (7) contacts the rocker switch (4); the input end of the gear set (5) is connected to the output end of the motor (3); two groups of traction members (6) are arranged; the gear set (5) is symmetrically provided with two output ends, one end of the two groups of traction members (6) is respectively connected to the two output ends of the gear set (5), and the other end is connected to the foot.
2. A foot drop auxiliary training device according to claim 1, characterized in that: The elastic support member (2) comprises four springs installed in the housing (1) and corresponding to the four corners of the lower surface of the motor (3).
3. The foot drop auxiliary training device according to claim 1, characterized in that: The traction member (6) comprises a shaft cylinder (61) and a fixing device (62); the shaft cylinder (61) is installed inside the shell (1); and a protruding hole (8) is provided on the lower surface of the shell (1); one end of the fixing device (62) is wound around the shaft cylinder (61), and the other end passes through the protruding hole (8) to be connected to the foot.
4. The foot drop auxiliary training device according to claim 1, characterized in that: The gear set (5) comprises a first gear (51) and a second gear (52) which are symmetrically arranged; the first gear (51) is connected to the output end of the motor (3), and the second gear (52) is meshed with the first gear (51); a first transmission gear (54) is coaxially fixedly arranged on the first gear (51), and a second transmission gear (53) is coaxially fixedly arranged on the second gear (52); the first transmission gear (54) and the second transmission gear (53) are respectively meshed with a third transmission gear (55), and the third transmission gear (55) is coaxially fixedly arranged on the traction member (6).
5. The foot drop auxiliary training device according to claim 1, characterized in that: The outer surface of the shell (1) is provided with a binding strap (9); and the binding strap (9) is provided with an adjustment buckle (10).
6. The foot drop auxiliary training device according to claim 3, characterized in that: The shaft cylinder (61) comprises a movable portion (611) and fixed portions (612) arranged at both ends of the movable portion (611); an elastic protrusion (11) is arranged on the end surface of the movable portion (611), and an inclined boss (12) is arranged on the inner surface of the fixed portion (612); the upper end of the inclined surface of the boss (12) is located in the direction in which the motor (3) drives the shaft cylinder (61) to rotate.