Nerve block postoperative rehabilitation training auxiliary device

Abstract

The invention discloses a nerve block postoperative rehabilitation training auxiliary device which comprises a rack, a handle, a main input shaft, a power conversion mechanism, an energy storage mechanism, a critical trigger mechanism and a power-assisted execution mechanism. The handle is vertically arranged on the rack in a sliding manner; the main input shaft is transversely and rotatably arranged on the rack; the power conversion mechanism is used for converting vertical sliding of the handle into one-way rotating motion of the main input shaft; the energy storage mechanism is used for storing mechanical energy when the main input shaft rotates unidirectionally and preventing the main input shaft from rotating reversely; the critical triggering mechanism is in linkage with the main input shaft and the energy storage mechanism and used for relieving reverse rotation prevention of the energy storage mechanism on the main input shaft when the handle moves to a preset critical position, and the assistance executing mechanism is connected with the main input shaft and used for applying upward assistance force to the handle when the main input shaft rotates reversely at a high speed. The nerve block postoperative rehabilitation training auxiliary device can provide instantaneous and accurate auxiliary rehabilitation training at the critical point where the nerve block postoperative rehabilitation training auxiliary device is most helpful.

Description

Technical Field

[0001] This invention specifically relates to an auxiliary device for rehabilitation training after nerve block surgery. Background Technology

[0002] Nerve blocks are a common method for pain management and surgical anesthesia, but postoperative complications often include decreased muscle strength and limited mobility in the affected limb, requiring systematic rehabilitation training to restore function. Currently, early postoperative rehabilitation largely relies on traditional physical devices such as weights, elastic bands, or fixed pulley systems. However, existing rehabilitation devices provide constant or monotonously varying forces, and their fundamental drawback lies in: Unable to provide assistance at critical moments: Patients often need help most at the "critical point" when their joints have reached their limit and their muscle strength is about to be exhausted. Traditional mechanical devices cannot recognize this moment and provide instantaneous bursts of assistance.

[0003] Poor interactivity: The training process is purely "confrontational" or "passive traction" rather than "assisted active movement," which does not conform to the core concept of neuromuscular re-education.

[0004] The concept of no energy recycling: The energy that patients have when they are able to move is wasted and cannot be stored to assist in movement when they are unable to move. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide an auxiliary device for rehabilitation training after nerve block surgery, which can provide instantaneous and precise rehabilitation training assistance at the critical point when the patient needs the most help.

[0006] To achieve the above objectives, the present invention provides a rehabilitation training aid device after nerve block surgery, comprising: frame; The handle is vertically slidably mounted on the frame; The main input shaft is horizontally and rotatably mounted on the frame; A power conversion mechanism is connected between the handle and the main input shaft, used to convert the vertical sliding motion of the handle into the unidirectional rotational motion of the main input shaft; An energy storage mechanism, connected to the main input shaft, is used to store mechanical energy when the main input shaft rotates in one direction and to prevent it from reversing. A critical triggering mechanism, linked to the main input shaft and the energy storage mechanism, is used to release the energy storage mechanism's obstruction of the main input shaft's reversal when the handle moves to a preset critical position. And an assist actuator, connected to the main input shaft, for applying an upward assist force to the handle when the main input shaft reverses at high speed.

[0007] Furthermore, the power conversion mechanism includes a rack, a main gear, and a one-way meshing assembly; the rack is vertically fixed to the handle; the main gear is coaxially fixed to the main input shaft and meshes with the rack; the one-way meshing assembly is disposed between the main gear and the main input shaft, so that the main gear can only drive the main input shaft to rotate when the rack moves upward.

[0008] Furthermore, the one-way engagement assembly is a one-way overrunning clutch, with its inner ring fixedly connected to the main input shaft and its outer ring fixedly connected to the main gear.

[0009] Furthermore, the energy storage mechanism includes a spring and a ratchet anti-reverse assembly; the inner end of the spring is fixedly connected to the main input shaft; the ratchet anti-reverse assembly includes a ratchet coaxially fixed to the main input shaft and an anti-reverse pawl disposed on the frame, the anti-reverse pawl engaging with the ratchet teeth of the ratchet under the action of gravity or spring force, allowing the main input shaft to rotate only in the energy storage direction.

[0010] Furthermore, the critical triggering mechanism includes a moving triggering component and a linkage unlocking component; the moving triggering component includes a trigger nut threaded onto the main input shaft and a guide rod arranged parallel to the main input shaft, the trigger nut being slidably connected to the guide rod; the linkage unlocking component includes an electromagnet disposed above the anti-reverse pawl and a micro switch disposed at the end of the guide rod; when the trigger nut moves to a preset position with the rotation of the main input shaft and presses the micro switch, the electromagnet is energized to generate magnetic force to attract the anti-reverse pawl, causing it to disengage from the ratchet.

[0011] Furthermore, the assist actuator includes a centrifugal booster assembly; the centrifugal booster assembly includes a vertically arranged driven shaft, a driven gear coaxially fixed on the driven shaft, a drive gear set connected to the main input shaft, and a centrifugal slider set on the driven shaft; the drive gear set is used to transmit the reverse motion of the main input shaft to the driven shaft; the centrifugal slider is engaged with the driven shaft by a thread or a bevel, and when the driven shaft rotates at high speed, the centrifugal slider slides upward under the action of centrifugal force and pushes against the handle.

[0012] Furthermore, the drive gear set is an acceleration gear set with a transmission ratio greater than 1, which makes the rotational speed of the driven shaft higher than that of the main input shaft.

[0013] Furthermore, the frame is provided with a limiting block for limiting the vertical sliding stroke of the handle.

[0014] Furthermore, a reset spring that provides a reset force is also connected between the handle and the frame.

[0015] Furthermore, the spring is housed in a spring box fixed to the frame, and its outer end is fixedly connected to the inner wall of the spring box.

[0016] The beneficial effects of this invention are: The above-mentioned rehabilitation training aids after nerve block surgery have at least the following advantages: 1. This invention constructs a complete mechanical intelligent assistance closed loop through the synergistic action of a "power conversion mechanism, energy storage mechanism, critical triggering mechanism, and assistive execution mechanism." The device stores the mechanical energy generated during the patient's active movement and automatically releases the stored energy through the triggering mechanism when the patient reaches a preset critical position and muscle strength is about to be exhausted, converting it into an upward thrust. This simulates the assistive technique of an experienced physical therapist "giving a push" when the patient is exhausted, achieving a leap from "constant assistance" to "on-demand assistance," greatly improving the targeting and efficiency of rehabilitation training.

[0017] 2. The critical triggering mechanism ensures that the boosting force is triggered only within a safe, preset travel range, effectively preventing joint damage or muscle strain caused by sudden weakness in the patient. Simultaneously, the energy storage mechanism is locked in a state preventing reverse rotation after energy storage, ensuring that energy is not accidentally released. It is only released under controlled conditions when a critical point is reached, making the entire process safe and reliable.

[0018] 3. Since the assistance comes from the patient's own previously stored energy, this "taken from oneself, used for oneself" model can greatly encourage the patient's training enthusiasm. In addition, the design of the power conversion mechanism ensures that energy is stored only during upward movement, and the downward reset process is easy and unobstructed, which is ergonomic and effectively reduces the patient's training fatigue, making it easier to adhere to long-term rehabilitation training. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of an auxiliary device for rehabilitation training after nerve block surgery according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram at point A in the middle; Figure 3 for Figure 1 A schematic diagram of the rehabilitation training aid device after nerve block surgery from another angle. Figure 4 for Figure 3 A schematic diagram at point B in the middle; Figure label: 100. Frame; 200. Handle; 300. Main input shaft; 400. Power conversion mechanism; 410. Rack; 420. Main gear; 430. One-way meshing assembly; 500. Energy storage mechanism; 510. Spring; 520. Ratchet anti-reverse assembly; 521. Ratchet; 522. Anti-reverse pawl; 600. Critical triggering mechanism; 610. Moving triggering assembly; 611. Trigger nut; 612. Guide rod; 620. Linkage unlocking assembly; 621. Electromagnet; 622. Micro switch; 700. Power-assisted actuator; 710. Driven shaft; 720. Driven gear; 730. Drive gear set; 740. Centrifugal slider; 800. Limit block; 900. Return spring. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Please see Figures 1 to 4 The present invention provides an auxiliary device for rehabilitation training after nerve block surgery, including a frame 100, a handle 200, a main input shaft 300, a power conversion mechanism 400, an energy storage mechanism 500, a critical triggering mechanism 600, and an assistive execution mechanism 700.

[0023] Specifically, the frame 100 provides support and a mounting base for the entire device. The handle 200 is vertically slidable on the frame 100 for the patient to grasp and perform up-and-down reciprocating push-pull exercises. The main input shaft 300 is horizontally and rotatably mounted on the frame 100.

[0024] A power conversion mechanism 400 is connected between the handle 200 and the main input shaft 300, used to convert the vertical sliding motion of the handle 200 into the unidirectional rotational motion of the main input shaft 300. An energy storage mechanism 500 is connected to the main input shaft 300, used to store mechanical energy during unidirectional rotation of the main input shaft 300 and prevent its reverse rotation. A critical trigger mechanism 600 is linked to the main input shaft 300 and the energy storage mechanism 500, used to release the reverse rotation prevention of the main input shaft 300 by the energy storage mechanism 500 when the handle 200 moves to a preset critical position. A power assist mechanism 700 is connected to the main input shaft 300, used to apply an upward assist force to the handle 200 when the main input shaft 300 reverses at high speed.

[0025] During use, the patient grips the handle 200 and pushes it upwards, which is an active work process. This linear motion is converted into a unidirectional rotational motion of the main input shaft 300 through the power conversion mechanism 400. This rotational motion drives the energy storage mechanism 500 to store the patient's biomechanical energy (e.g., to tighten the spring 510). Simultaneously, the critical trigger mechanism 600 gradually approaches the trigger state as the main input shaft 300 rotates. When the handle 200 reaches a preset critical position (i.e., the position where the patient's muscle strength is about to be exhausted), the critical trigger mechanism 600 activates, releasing the energy storage mechanism 500's resistance to the reverse rotation of the main input shaft 300. The stored energy is released instantaneously, driving the main input shaft 300 to reverse at high speed. This high-speed reverse rotation is converted into an upward, pulsed thrust through the assist actuator 700, acting on the handle 200 to help the patient overcome the final difficult stage and complete the entire upward movement. The entire process, through energy storage and release assistance, greatly improves the efficiency and safety of rehabilitation training.

[0026] In this embodiment, the power conversion mechanism 400 includes a rack 410, a main gear 420, and a one-way meshing assembly 430; the rack 410 is vertically fixed to the handle 200; the main gear 420 is coaxially fixed to the main input shaft 300 and meshes with the rack 410; the one-way meshing assembly 430 is disposed between the main gear 420 and the main input shaft 300, so that the main gear 420 can only drive the main input shaft 300 to rotate when the rack 410 moves upward.

[0027] In this embodiment, a one-way overrunning clutch is preferred. The inner ring of the clutch is fixedly connected to the main input shaft 300, and the outer ring is fixedly connected to the main gear 420.

[0028] In use, when the patient pushes the handle 200 upwards, the rack 410 moves upwards, driving the main gear 420 to rotate counterclockwise (assuming a left-to-right viewing angle). At this time, the one-way overrunning clutch is engaged, and the rotational power of the main gear 420 is transmitted to the main input shaft 300, which then rotates counterclockwise synchronously – this is the energy storage process. When the patient pulls the handle 200 downwards or when the handle 200 moves downwards under the action of the reset device with the assistance of the device, the rack 410 moves downwards, driving the main gear 420 to attempt to rotate clockwise. At this time, the one-way overrunning clutch is in an overrunning state (i.e., slipping), and the main input shaft 300 will not rotate accordingly. This design ensures that energy is only stored when the patient actively exerts upward force, while the downward reset process is smooth and unobstructed, conforming to ergonomics and reducing training fatigue.

[0029] In a preferred embodiment, the energy storage mechanism 500 includes a spring 510 and a ratchet anti-reverse assembly 520. The inner end of the spring 510 is fixedly connected to the main input shaft 300. The ratchet anti-reverse assembly 520 includes a ratchet 521 coaxially fixed to the main input shaft 300 and an anti-reverse pawl 522 hinged to the frame 100. The anti-reverse pawl 522 engages with the ratchet teeth of the ratchet 521 under the action of gravity or spring force, allowing the main input shaft 300 to rotate only in the energy storage direction. To protect and house the spring 510, it is placed in a spring box fixed to the frame 100, and the outer end of the spring 510 is fixed to the inner wall of the spring box.

[0030] In operation, when the main input shaft 300 rotates counterclockwise (in the energy storage direction) due to the patient's exertion, the teeth of the ratchet 521 push open the anti-reverse pawl 522, allowing it to pass smoothly. The spring 510 is gradually tightened, and energy is stored. Once the patient stops exerting force, the main input shaft 300 tends to reverse under the reaction force of the spring 510. At this time, the ratchet 521 will push against the anti-reverse pawl 522 in the opposite direction. Due to the wedge-shaped anti-reverse action of the pawl, the reverse rotation of the main input shaft 300 is effectively prevented. This is similar to winding and locking a clock; the energy is safely stored, waiting to be released. The spring box design avoids the risk of sudden breakage of the spring 510 and prevents dust and foreign objects from affecting its operation.

[0031] In a preferred embodiment of the present invention, the critical triggering mechanism 600 includes a movable triggering component 610 and a linkage unlocking component 620. The movable triggering component 610 includes a trigger nut 611 threaded onto the main input shaft 300 and a guide rod 612 arranged parallel to the main input shaft 300, with the trigger nut 611 slidably connected to the guide rod 612; the linkage unlocking component 620 includes an electromagnet 621 disposed above the anti-reverse pawl 522 and a micro switch 622 disposed at the end of the guide rod 612; when the trigger nut 611 moves to a preset position as the main input shaft 300 rotates and presses the micro switch 622, the electromagnet 621 is energized to generate magnetic force to attract the anti-reverse pawl 522, causing it to disengage from the ratchet 521.

[0032] When the main input shaft 300 rotates during energy storage, the trigger nut 611, under the action of the thread, slowly moves from the starting end to the end along the guide rod 612. This moving distance precisely corresponds to the number of rotations of the main input shaft 300, which is also the upward height of the handle 200. When the handle 200 reaches the preset critical position, the trigger nut 611 also moves to the end of the guide rod 612 and presses the micro switch 622. After the micro switch 622 is triggered, the circuit is turned on (the power supply and wiring are not shown in the figure), and the electromagnet 621 is instantly energized, generating a strong magnetic attraction that pulls the anti-reverse pawl 522 upward, causing it to overcome gravity or spring force and completely disengage from the ratchet 521.

[0033] In a preferred embodiment of the present invention, the core of the power-assisted actuator 700 is a centrifugal booster component.

[0034] Specifically, the component includes a vertically arranged driven shaft 710, a driven gear 720 coaxially fixed thereon, a drive gear set 730 connected to the main input shaft 300, and a centrifugal slider 740 sleeved on the driven shaft 710. The drive gear set 730 is preferably an acceleration gear set, i.e., its transmission ratio is greater than 1, for example, using a combination of a small gear driving a large gear, so that the output speed of the driven shaft 710 is much higher than the input speed of the main input shaft 300. The inner hole of the centrifugal slider 740 is engaged with the outer surface of the driven shaft 710 via a trapezoidal thread or a bevel.

[0035] When the ratchet 521's anti-reverse mechanism is released, the main input shaft 300 reverses at high speed under the drive of the spring 510. This reverse motion is further accelerated by the drive gear set 730 (accelerator gear set) and then transmitted to the driven shaft 710, causing it to generate extremely high rotational speed. The high-speed rotating driven shaft 710 drives the centrifugal slider 740 through a thread or inclined plane. Due to the strong influence of the centrifugal effect, the centrifugal slider 740's center of mass tends to move outward, but under the constraint of the thread / inclined plane, this motion is converted into a rapid upward sliding along the driven shaft 710. The rapidly upward sliding centrifugal slider 740 directly impacts or pushes the bottom of the handle 200, thereby transmitting a huge, instantaneous upward thrust to the handle 200. The function of the acceleration gear set is to amplify the rotational speed, thereby greatly enhancing the centrifugal effect and ensuring that even with limited stored energy, a sufficiently strong instantaneous thrust can be generated.

[0036] As a further improvement to the present invention, a limit block 800 is provided on the frame 100 to limit the vertical sliding stroke of the handle 200 and prevent injury caused by excessive extension of the patient's joints. Meanwhile, a return spring 900 is also connected between the handle 200 and the frame 100.

[0037] Once a complete "energy storage-boost" action is completed, the handle 200 will automatically return to the starting position under the pulling force of the return spring 900, ready for the next training cycle. The limit block 800 and the return spring 900 together ensure the safety of the training process and the convenience of reciprocating training, improving the user experience.

[0038] This device, through the collaborative work of various mechanisms, has successfully created a rehabilitation training device that can sense the patient's movement status and provide precise assistance at the most critical moments, thus helping the patient recover quickly.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A rehabilitation training aid device after nerve block surgery, characterized in that, include: frame; The handle is vertically slidably mounted on the frame; The main input shaft is horizontally and rotatably mounted on the frame; A power conversion mechanism is connected between the handle and the main input shaft, used to convert the vertical sliding motion of the handle into the unidirectional rotational motion of the main input shaft; An energy storage mechanism, connected to the main input shaft, is used to store mechanical energy when the main input shaft rotates in one direction and to prevent it from reversing. A critical triggering mechanism, linked to the main input shaft and the energy storage mechanism, is used to release the energy storage mechanism's obstruction of the main input shaft's reversal when the handle moves to a preset critical position. And an assist actuator, connected to the main input shaft, for applying an upward assist force to the handle when the main input shaft reverses at high speed.

2. The rehabilitation training aid device after nerve block surgery according to claim 1, characterized in that, The power conversion mechanism includes a rack, a main gear, and a one-way meshing assembly; the rack is vertically fixed to the handle; the main gear is coaxially fixed to the main input shaft and meshes with the rack; the one-way meshing assembly is disposed between the main gear and the main input shaft, so that the main gear can only drive the main input shaft to rotate when the rack moves upward.

3. The rehabilitation training aid device after nerve block surgery according to claim 2, characterized in that, The one-way engagement assembly is a one-way overrunning clutch, with its inner ring fixedly connected to the main input shaft and its outer ring fixedly connected to the main gear.

4. The rehabilitation training aid device after nerve block surgery according to claim 1, characterized in that, The energy storage mechanism includes a spring and a ratchet anti-reverse assembly; the inner end of the spring is fixedly connected to the main input shaft; the ratchet anti-reverse assembly includes a ratchet coaxially fixed to the main input shaft and an anti-reverse pawl disposed on the frame, the anti-reverse pawl engaging with the ratchet teeth of the ratchet under the action of gravity or spring force, allowing the main input shaft to rotate only in the energy storage direction.

5. The rehabilitation training aid device after nerve block surgery according to claim 4, characterized in that, The critical triggering mechanism includes a moving triggering component and a linkage unlocking component; the moving triggering component includes a trigger nut threaded onto the main input shaft and a guide rod arranged parallel to the main input shaft, the trigger nut being slidably connected to the guide rod; the linkage unlocking component includes an electromagnet disposed above the anti-reverse pawl and a micro switch disposed at the end of the guide rod; when the trigger nut moves to a preset position as the main input shaft rotates and presses the micro switch, the electromagnet is energized to generate magnetic force to attract the anti-reverse pawl, causing it to disengage from the ratchet.

6. The rehabilitation training aid device after nerve block surgery according to claim 1, characterized in that, The assist actuator includes a centrifugal booster assembly; the centrifugal booster assembly includes a vertically arranged driven shaft, a driven gear coaxially fixed on the driven shaft, a drive gear set connected to the main input shaft, and a centrifugal slider set on the driven shaft; the drive gear set is used to transmit the reverse motion of the main input shaft to the driven shaft; the centrifugal slider is engaged with the driven shaft by a thread or a bevel, and when the driven shaft rotates at high speed, the centrifugal slider slides upward under the action of centrifugal force and pushes against the handle.

7. The rehabilitation training aid device after nerve block surgery according to claim 6, characterized in that, The drive gear set is an acceleration gear set with a transmission ratio greater than 1, which makes the rotational speed of the driven shaft higher than that of the main input shaft.

8. The rehabilitation training aid device after nerve block surgery according to claim 1, characterized in that, The frame is provided with a limiting block for restricting the vertical sliding stroke of the handle.

9. The rehabilitation training aid device after nerve block surgery according to claim 1, characterized in that, A reset spring that provides reset force is also connected between the handle and the frame.

10. The rehabilitation training aid device after nerve block surgery according to claim 4, characterized in that, The spring is housed in a spring box fixed to the frame, and its outer end is fixedly connected to the inner wall of the spring box.

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