Linkage type folding ladder embedded into medical examination bed and system

Abstract

The invention belongs to the technical field of medical auxiliary equipment, and particularly relates to a folding ladder system embedded into a medical examination couch in a linkage mode, a folding ladder embedded into the medical examination couch in a linkage mode comprises a base plate, a plurality of pedals, a plurality of connecting rods, a rope, a reset damping rod, a locking mechanism and a sliding plate, the base plate is fixed to a side beam of the medical examination couch and used for bearing a ladder body; the front end of the second pedal is connected with the first pedal through a rope; the third pedal is hinged to the top of the base plate and forms a parallel four-connecting-rod mechanism with the rear end of the second pedal through the first connecting rod and the second connecting rod, so that the third pedal is always parallel to the rear end of the second pedal; the reset damping rod is located between the rear end of the second pedal and the third pedal, slow descending and automatic resetting are provided, orderly buffering braking can be carried out on the pedals in the process that a patient gets off the ladder, stable transition of the gravity center from forward inclining to stepping is achieved, the risks of forward inclining, step missing, weightlessness and falling are remarkably reduced, and the use safety is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical auxiliary equipment, and in particular relates to a linked folding ladder embedded in a medical examination bed and a system thereof. Background Art

[0002] During routine examinations, the examination bed often needs to be raised to a higher position to facilitate the doctor's vision and operation. However, if the bed height remains unchanged, it is very inconvenient for patients to get on and off the bed, especially for the elderly and postoperative patients with limited mobility or insufficient physical strength. Medical staff often need to repeatedly adjust the bed height or provide support throughout the process to ensure safe getting on and off.

[0003] To address the above problems, common solutions in the existing technology include raising and lowering the bed, changing the bed angle, etc., but all of them require additional power devices to be added to the bed and need to be plugged in for use. In addition, such beds are generally expensive and sold at high prices. They are usually only equipped in specific wards and examination rooms and cannot be popularized to all departments.

[0004] The prior art (publication number CN119344759A) proposes an embedded folding ladder, which hides the ladder body inside the guardrail to achieve integrated storage of the steps and the bed body, saving space and allowing patients to get in and out of bed conveniently. At the same time, it is low-cost and suitable for promotion.

[0005] However, most patients are physically weak and have reduced ability to control their center of gravity. They usually need help from an attendant when walking up and down stairs. Their center of gravity will continue to tilt forward, but there is often a lack of any structure in front that can provide effective support or braking. Once the patient's center of gravity is out of control when going downstairs, they will face a series of high-risk actions of "leaning forward - stepping on air - weightlessness - falling", and existing folding ladders cannot provide any protection for the center of gravity shift on this path. Summary of the Invention

[0006] The purpose of the present invention is to provide a linkage type folding ladder embedded in a medical examination bed and a system, which can achieve buffered deceleration and smooth transition of the center of gravity during the patient's descent by setting the pedal position and damping.

[0007] A linkage type folding ladder embedded in a medical examination bed comprises a base plate, a first pedal, a front end of a second pedal, a rear end of the second pedal, a third pedal, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a cable, a reset damping rod, a locking mechanism and a slide plate, wherein:

[0008] The base plate is fixed to the side beam of the medical examination bed and is used to support the ladder body;

[0009] The first pedal is rotatably connected to the top of the base plate via a fourth connecting rod;

[0010] The front end of the second pedal is connected to the first pedal via a cable, and the front end of the second pedal is hinged to the rear end of the second pedal;

[0011] The third pedal is hinged to the top of the base plate and forms a parallel four-bar linkage with the rear end of the second pedal via the first connecting rod and the second connecting rod, so that the third pedal always remains parallel to the rear end of the second pedal;

[0012] The reset damping rod is located between the rear end of the second pedal and the third pedal, and is used to provide slow descent and automatic reset;

[0013] The locking mechanism cooperates with the third pedal to lock the third pedal in the deployed position;

[0014] The slide plate is arranged on the base plate and is linked to the third pedal via a third connecting rod, and is used to support and retract the third pedal;

[0015] When patients go up and down the ladder, the pedals can be sequentially deployed and buffered and reset through the coordinated action of the cable, the connecting rod mechanism and the reset damping rod.

[0016] Furthermore, the cable applies tension to the front end of the second pedal only when it is taut, thereby driving the second pedal downward when the first pedal is pressed downward, and the cable is in a relaxed state when the first pedal is forced upward, and does not drive the second pedal to rise.

[0017] Furthermore, the reset damping rod includes an outer sleeve and a telescopic rod that can be extended and retracted in both directions. An outer spring and an inner spring are arranged inside the outer sleeve. When the telescopic rod is pulled out, the outer spring and the inner spring simultaneously generate a pullback force to provide slow descent damping; after the load is released, the two springs work together to pull the telescopic rod back to the outer sleeve to reset the second pedal.

[0018] Furthermore, the outer spring is a compression spring sleeved on the outside of the telescopic rod, and the inner spring is a tension spring located in the hollow inner cavity of the telescopic rod. The two are coaxially arranged to form a double-spring damping structure.

[0019] Furthermore, the locking mechanism includes a lock tongue socket arranged on the base plate, a lock tongue fixedly connected to the slide, a lock tongue spring for pushing the lock tongue, and an unlocking rope for releasing the lock; when the folding ladder is unfolded, the lock tongue enters the lock tongue socket and pops out under the action of the lock tongue spring, thereby locking the third pedal.

[0020] Furthermore, when the third pedal is flipped upward and unfolded, the third connecting rod drives the slide plate to slide along the base plate to a locked position, so that the third pedal, the third connecting rod and the slide plate form a triangular support structure to keep the third pedal parallel to the ground.

[0021] Furthermore, the first connecting rod and the second connecting rod are of equal length and parallel to each other, and together with the third pedal and the rear end of the second pedal form a parallel four-bar linkage mechanism, thereby ensuring that the third pedal and the rear end of the second pedal remain parallel during the entire movement process.

[0022] Furthermore, both ends of the cable are connected to the front ends of the first pedal and the second pedal respectively.

[0023] Furthermore, the damping coefficient of the reset damping rod is replaceable or adjustable to adapt to the descent speed requirements of patients of different weights.

[0024] The present invention also provides a reservation system for use with a folding ladder, comprising a weight collection terminal, a damping matching module, a damping execution terminal, a gateway, a platform server, and an application client. The damping target calculation formula in the damping matching module is:

[0025]

[0026] Where I is the moment of inertia of the folding ladder step assembly;

[0027] k is the stiffness of the return spring;

[0028] ζ is the target damping ratio;

[0029] The calculation formula for the equivalent moment of inertia I is:

[0030]

[0031] in:

[0032] I0 is the inertia of the ladder plate and connecting parts kg·m 2 ;

[0033] r is the equivalent radius m of the patient's center of gravity relative to the pedal hinge point.

[0034] The beneficial effects achieved by the present invention using the above structure are as follows:

[0035] (1) Through the coordinated linkage of the cable, the connecting rod mechanism and the reset damping rod, the present invention can orderly buffer and brake the pedals at each level when the patient goes down the stairs, realize a smooth transition of the center of gravity from leaning forward to stepping, significantly reduce the risk of "leaning forward - stepping on air - weightlessness - falling", and improve the safety of use.

[0036] (2) Combined with the damping coefficient scheme based on dynamic calculation of patient weight, precise damping matching for patients of different weights is achieved, which not only eliminates pedal overshoot but also avoids reset hysteresis, taking into account both comfort and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the folding state of the folding ladder of the present invention;

[0038] Figure 2 This is a schematic diagram of the folding ladder of the present invention in an unfolded state;

[0039] Figure 3 This is a schematic diagram of the folding ladder of the present invention in use;

[0040] Figure 4 This is a schematic diagram of the locking mechanism structure of part A of the present invention;

[0041] Figure 5 It is a schematic diagram of the structure of the reset damping rod of the present invention.

[0042] Among them, 1. Base plate; 2. First pedal; 3. Second pedal; 301. Front end of the second pedal; 302. Rear end of the second pedal; 4. Third pedal; 5. First connecting rod; 6. Second connecting rod; 7. Third connecting rod; 8. Fourth connecting rod; 9. Cable; 10. Reset damping rod; 101. Outer sleeve; 102. Telescopic rod; 103. Outer spring; 104. Inner spring; 11. Locking mechanism; 1101. Lock tongue socket; 1102. Lock tongue; 1103. Lock tongue spring; 1104. Unlocking rope; 12. Slide plate. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0044] The present invention provides a linkage type folding ladder embedded in a medical examination bed and a system, which are as follows:

[0045] The folding ladder of the present invention is composed of a base plate 1, a plurality of pedals, a plurality of connecting rods, a cable 9, a reset damping rod 10, a locking mechanism 11 and a slide plate 12.

[0046] like Figure 1 、 2 As shown, the base plate 1 is fixedly mounted on the side beam of the diagnostic bed guardrail to support the entire ladder structure;

[0047] The first pedal 2 and the top of the base plate 1 are connected by a fourth connecting rod 8, so that the first pedal 2 can rotate around the connection point between the fourth connecting rod 8 and the top of the base plate 1. The first pedal 2 and the second pedal 3 are connected by a cable 9;

[0048] The second pedal 3 is divided into a second pedal front end 301 and a second pedal rear end 302, and the second pedal front end 301 and the second pedal rear end 302 are hinged. In the folded state of the folding ladder, this enables the second pedal front end 301 to be nearly flat, while the second pedal rear end 302 is in a vertical state; in the unfolded state, the second pedal front end 301 and the second pedal rear end 302 can form a plane parallel to the ground.

[0049] The front end 301 of the second pedal is connected to the first pedal 2 via a cable. Since the cable 9 can only apply tension to the second pedal 3 after the tension reaches its peak, the first pedal 2 can only drive the second pedal 3 downward through the cable 9 after the first pedal 2 is subjected to downward pressure. When the first pedal 2 is subjected to an upward force, the cable 9 is in a relaxed state, so the second pedal 3 will not be lifted synchronously and will remain in its original position.

[0050] The third pedal 4 is the highest pedal. The third pedal 4 is hinged to the top of the base plate 1. The third pedal 4 is connected to the rear end 302 of the second pedal via the first connecting rod 5 and the second connecting rod 6 to form a parallel linkage mechanism, which ensures that the third pedal 4 and the rear end 302 of the second pedal are always parallel.

[0051] When the patient is facing upwards:

[0052] In the initial state;

[0053] The third pedal 4 remains at a locked height;

[0054] The return damping rod 10 is fully retracted, and the rear end of the second pedal 3 is lifted by the return damping rod 10 to be approximately at the same height as the third pedal 4;

[0055] The first pedal 2 is in mid-air due to the traction of the cable 9;

[0056] When the patient steps on the first pedal 2, the first pedal 2 drives the cable 9 to tighten, pulling the second pedal 3 down, and the reset damping rod 10 is stretched and provides damping; after the first pedal 2 drops to the ground, the second pedal 3 is located in the middle position between the first pedal 2 and the third pedal 4, and the folding ladder is formed as shown in FIG. Figure 2 In the state shown, the patient steps up one level again to the second pedal 3, and the folding ladder maintains the same state. When the patient moves up again with both feet on the third pedal 4, the second pedal 3 is reset under the action of the reset damping rod 10 and returns to the initial state.

[0057] With the patient down:

[0058] In the initial state, similarly;

[0059] The third pedal 4 remains at a locked height;

[0060] The rear end of the second pedal 3 is raised by the reset damping rod 10 and is approximately at the same height as the third pedal 4;

[0061] The first pedal 2 is in mid-air due to the traction of the cable 9;

[0062] When only the third pedal 4 is stepped on, the second pedal 2 and the third pedal 4 are at similar heights, and the first pedal 2 is in mid-air. After the patient steps on the second pedal 3, the first pedal 2 and the second pedal 3 will drop, the second pedal 3 will drop to mid-air, and the first pedal 2 will drop to the ground. After the patient completely leaves, the pedals return to their initial state.

[0063] The reset damping rod 10 is disposed between the rear end 302 of the second pedal and the third pedal 4, providing slow descent and automatic reset functions;

[0064] The reset damping rod 10 includes an outer sleeve 101 and a telescopic rod 102 that slides bidirectionally in the outer sleeve 101;

[0065] An outer spring 103 is further provided in the outer sleeve 101. The outer spring 103 is a compression spring and is sleeved on the outside of the telescopic rod.

[0066] The inner spring 104 is a tension spring, one end of which is connected to the inner base of the outer sleeve 101 and the other end is connected to the hollow interior of the telescopic rod 102;

[0067] When the telescopic rod 102 is pulled out, the outer spring 103 and the inner spring 104 of the reset damping rod 10 are simultaneously stressed to generate a pulling force, thereby ensuring that the second pedal 3 is smoothly lowered when being stepped on;

[0068] After the load is released, the double springs work together to actively pull the telescopic rod 102 back into the outer sleeve 101, so that the second pedal 3 is lifted, and the second pedal 3 is reset.

[0069] The locking mechanism 11 includes a locking tongue socket 1101 , a locking tongue 1102 , a locking tongue spring 1103 and an unlocking rope 1104 , and is used to lock the third pedal 4 in the unfolded state.

[0070] The lock tongue socket 1101 is located on the base plate 1. In the folded state, the lock tongue 1102 is pressed into the slide plate 12 by the base plate 1. In the unfolded state, the lock tongue 1102 rises. When the lock tongue 1102 enters the lock tongue socket 1101, the lock tongue 1102 pops out under the thrust of the lock tongue spring 1103, fixing the slide plate 12 on the base plate and fixing the third pedal 4 at the same time.

[0071] When folding is required, the locking tongue 1102 can be retracted by pulling the unlocking rope 1104, thereby releasing the fixation between the slide plate 12 and the third pedal 4, and the third pedal 4 is rotated downward to restore the folded state.

[0072] The skateboard 12 is arranged on the base plate 1 and can slide on the base plate 1. When the third pedal 4 flips upward, it drives the skateboard 12 to slide upward through the third connecting rod 7. When the skateboard 12 slides to the locked position, the third pedal, the third connecting rod 7 and the skateboard 12 form a triangular support, so that the third pedal 4 can remain parallel to the ground.

[0073] In addition, for patients of different weights, the resetting damping rod 10 usually requires different damping, so the folding ladder of this embodiment is also used in conjunction with the reservation system;

[0074] The appointment system can automatically match and configure the folding ladder damping during the patient appointment / examination phase, further improving clinical safety and nursing efficiency.

[0075] The system architecture includes:

[0076] The terminal layer includes a weight collection terminal and a folding ladder unlocking terminal. The weight collection terminal uses a four-point weighing sensor structure; the damping unlocking terminal can unlock folding ladders with different damping according to weight data.

[0077] After the patient enters the weight collection terminal, the weight collection module 201 automatically measures the weight W and encapsulates the measured data into<patient_id,W,timestamp> format, uploaded via the edge layer.

[0078] The damping matching module 202 has a built-in damping mapping table and a damping target calculation formula:

[0079]

[0080] Where I is the moment of inertia of the folding ladder step assembly, k is the return spring stiffness, and ζ is the target damping ratio.

[0081] The calculation formula for the equivalent moment of inertia I is:

[0082]

[0083] in:

[0084] I0 is the inertia of the ladder plate and the connecting parts (kg·m 2 );

[0085] r is the equivalent radius of the patient's center of gravity relative to the pedal hinge (m).

[0086] According to the received weight W, the target damping coefficient c_t is obtained by querying the corresponding interval or directly calculating it, and then generating the damping gear instruction.<ladder_id,damping_level,c_t> .

[0087] The terminal layer communicates with the edge layer via BLE or wired CAN-Bus.

[0088] The edge layer, composed of gateways, is responsible for local aggregation, caching and MQTT forwarding of terminal data, and provides 24-hour off-network caching in the event of network failure.

[0089] The platform layer is deployed on in-hospital servers or private clouds, and includes a damping matching engine, a ladder resource pool, a reservation and scheduling service, and a data governance center. Services are called from one another via a microservices architecture (HTTP / REST+JSON).

[0090] The application layer provides the nurse station web client and management background for appointment ordering, work order distribution, operation monitoring and data visualization.

[0091] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A linkage type folding ladder embedded in a medical examination bed, characterized in that: The vehicle comprises a base plate, a first pedal, a front end of a second pedal, a rear end of a second pedal, a third pedal, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a cable, a reset damping rod, a locking mechanism and a slide plate, wherein: The base plate is fixed to the side beam of the medical examination bed and is used to support the ladder body; The first pedal is rotatably connected to the top of the base plate via a fourth connecting rod; The front end of the second pedal is connected to the first pedal via a cable, and the front end of the second pedal is hinged to the rear end of the second pedal; The third pedal is hinged to the top of the base plate and forms a parallel four-bar linkage with the rear end of the second pedal via the first connecting rod and the second connecting rod, so that the third pedal always remains parallel to the rear end of the second pedal; The reset damping rod is located between the rear end of the second pedal and the third pedal, and is used to provide slow descent and automatic reset; The locking mechanism cooperates with the third pedal to lock the third pedal in the deployed position; The slide plate is arranged on the base plate and is linked to the third pedal via a third connecting rod, and is used to support and retract the third pedal; When patients go up and down the ladder, the pedals can be sequentially deployed and buffered and reset through the coordinated action of the cable, the connecting rod mechanism and the reset damping rod.

2. The linkage type folding ladder embedded in a medical examination bed according to claim 1, characterized in that: The cable applies tension to the front end of the second pedal only when it is taut, so that when the first pedal is pressed downward, the second pedal is driven downward, and when the first pedal is forced upward, the cable is in a relaxed state and does not drive the second pedal to rise.

3. The linkage type folding ladder embedded in a medical examination bed according to claim 1, characterized in that: The reset damping rod includes an outer sleeve and a telescopic rod that can be extended and retracted in both directions. An outer spring and an inner spring are arranged in the outer sleeve. When the telescopic rod is pulled out, the outer spring and the inner spring simultaneously generate a pull-back force to provide slow descent damping; after the load is released, the two springs work together to pull the telescopic rod back to the outer sleeve to reset the second pedal.

4. The linkage type folding ladder embedded in a medical examination bed according to claim 1, characterized in that: The outer spring is a compression spring sleeved on the outside of the telescopic rod, and the inner spring is a tension spring located in the hollow inner cavity of the telescopic rod. The two are coaxially arranged to form a double-spring damping structure.

5. The linkage type folding ladder embedded in a medical examination bed according to claim 1, characterized in that: The locking mechanism includes a lock tongue socket provided on the base plate, a lock tongue fixedly connected to the slide plate, a lock tongue spring for pushing the lock tongue, and an unlocking rope for releasing the lock; when the folding ladder is unfolded, the lock tongue enters the lock tongue socket and pops out under the action of the lock tongue spring, thereby locking the third pedal.

6. The linkage type folding ladder embedded in a medical examination bed according to claim 1, characterized in that: When the third pedal is flipped upward and unfolded, the third connecting rod drives the slide plate to slide along the base plate to a locked position, so that the third pedal, the third connecting rod and the slide plate form a triangular support structure to keep the third pedal parallel to the ground.

7. The linkage type folding ladder embedded in a medical examination bed according to claim 1, characterized in that: The first connecting rod and the second connecting rod are of equal length and parallel to each other, and together with the third pedal and the rear end of the second pedal form a parallel four-bar linkage mechanism, thereby ensuring that the third pedal and the rear end of the second pedal remain parallel during the entire movement process.

8. The linkage type folding ladder embedded in a medical examination bed according to claim 1, characterized in that: The two ends of the cable are respectively connected to the front ends of the first pedal and the second pedal.

9. The linkage type folding ladder embedded in a medical examination bed according to claim 1, characterized in that: The damping coefficient of the reset damping rod is replaceable or adjustable to meet the requirements of patients with different weights for the descent speed.

10. A reservation system for use with any folding ladder according to any one of claims 1 to 9, characterized in that: It includes a weight collection terminal, a damping matching module, a damping execution terminal, a gateway, a platform server, and an application client. The damping target calculation formula in the damping matching module is: Where I is the moment of inertia of the folding ladder step assembly; k is the stiffness of the return spring; ζ is the target damping ratio; The calculation formula for the equivalent moment of inertia I is: in: I0 is the inertia of the ladder plate and connecting parts kg·m 2 ; r is the equivalent radius m of the patient's center of gravity relative to the pedal hinge point.

Images