Automatically adaptable physical therapy ladder

Abstract

The present application relates to a rehabilitation treatment ladder, in particular to an automatically adaptive physical therapy ladder, wherein the ladder comprises a fixed base frame and a plurality of step parts arranged in a ladder shape, the ladder can adjust the step size and step height, and can be transformed into a slope, first, the fixed base frame is used to longitudinally support all the step parts, and is also used to provide a support frame for the lateral movement of the step parts to adjust the step size; second, the step part itself has the function of adjusting the height to adjust the step height, in addition, an inner support frame is arranged below the step part, which is used to control the overturning of the step part, so as to realize the transformation between the steps and the slope. Since the action ability of different patients is different, and the gait size required in different rehabilitation stages is different, the physical therapy ladder can adjust the state of the step part through its own structure, so as to meet different use requirements, in addition, it can also be transformed into a slope for the patient to walk on the slope.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of rehabilitation treatment ladder, specifically, automatically adaptive physical therapy ladder. BACKGROUND

[0002] In the rehabilitation process of partial patient, physical therapy ladder is important auxiliary tool, it can at least effectively move the joint of patient, knee joint and hip joint, the movement of these joints can provide good feedback to body function, so as to alleviate the discomfort of other body functions caused by partiality as much as possible, even can make patient gradually recover health.Current physical therapy ladder generally includes rail, several steps, intermediate platform, patient goes from the step of one side, after passing through intermediate platform, from the step of the other side, some physical therapy ladder is step on one side, and slope on the other side.And the step of existing treatment ladder is fixedly arranged, its stride size and stride height are fixed, this will cause some patients cannot get training suitable for their own conditions, and increasing the number of treatment ladder will increase the space occupied, in the existing size rehabilitation room, this will occupy more activity space. SUMMARY

[0003] The purpose of the present application is to provide a kind of physical therapy ladder that can adjust the stride size and stride height of step, to meet the use needs of different patients, in addition, the physical therapy ladder can also switch between step and slope, and patients can complete two different training on one treatment ladder.

[0004] To achieve the above object, the present application provides the following technical scheme: automatically adaptive physical therapy ladder, including step part, the step part includes fixed chassis and n footrests distributed in ladder shape, each footrest is independently installed on inverted "П" type footrest support, and the left and right sides of the footrest support are provided with sliding assembly;The left and right sides of the fixed chassis are symmetrically provided with a plurality of transverse bars extending along the width direction of footrest, the sliding assembly is installed on the transverse bar and can move horizontally along the transverse bar;Screw I driven by motor assembly is arranged on the fixed chassis, and the screw I is parallel to the transverse bar;The screw I has n thread segments with same rotation direction, among the n thread segments, the pitch of the thread segment with minimum pitch is a, the pitch of all thread segments is sequentially increased in arithmetic sequence, and the tolerance is a;Threaded sleeve cooperating with each thread segment is arranged on each footrest support.

[0005] In the above technical scheme, when the motor assembly controls the rotation of the screw rod I, the threaded sleeves on each footrest support will translate in the same direction relative to the screw rod I. Since the pitches of the threaded segments are arranged in an arithmetic progression, the displacement difference of any two adjacent threaded sleeves is equal, that is, the scheme can uniformly adjust the lateral distance between the footrests in the step part, and can adjust the physical therapy ladder according to the actual situation of the patient to meet different stride size requirements.

[0006] For the physical therapy ladder capable of adjusting the stride size laterally, preferably, the footrests thereof include lower holders and footrest plates, a lifting mechanism is installed on the lower holder, the upper part of the lifting mechanism is connected to the footrest plate, the lifting mechanism can horizontally lift the footrest plate to adjust the distance between the footrest plate and the lower holder, and the heights at which the lifting mechanisms control the movement of the footrest plates in the n footrests are arranged in an arithmetic progression. For the scheme in which the footrests have independently arranged liftable footrest plates, preferably, the lower holder is a groove structure with an open top, and the lifting mechanism is hidden in the groove structure when lowered. In this scheme, the height of the lower holder remains unchanged, and the height of the footrest plate is controlled by the lifting mechanism, thereby achieving adjustment of the longitudinal distance of the footrests, that is, the scheme can adjust all the footrests according to the stride height of the user, thereby meeting the needs of different users, and the lifting mechanism is arranged on the lower holder, so the adjustment process does not conflict with the horizontal adjustment process of the footrests.

[0007] For the scheme in which the footrests have independently arranged liftable footrest plates, considering the size of the footrests, preferably, the lifting mechanism that controls the lifting thereof includes two groups of scissor lifting mechanisms that are symmetrically arranged in the length direction of the footrest, and each group of scissor lifting mechanisms includes two scissor supports that are symmetrically arranged in the width direction of the footrest. The scissor support includes a first support arm and a second support arm that are movably connected in an X shape. In the same group of scissor lifting mechanisms, the upper end and the lower end of the first side of the first support arm and the second support arm are fixedly connected to the footrest plate and the holder groove body through fixed hinge seats, respectively, and the upper end and the lower end of the second side are movably arranged, and two of the lower ends are free ends and are connected by the same connecting piece. The scissor lifting mechanism further includes an adjustment assembly that controls the connecting pieces on both sides to move close to or away from each other.

[0008] For the technical scheme using the scissor lifting mechanism, preferably, the adjustment assembly includes a double-headed threaded rod installed on the lower holder along the length direction of the footrest, and a driving motor that drives the rotation of the double-headed threaded rod. The two threaded segments of the double-headed threaded rod have the same pitch and opposite rotation directions. A threaded sleeve that cooperates with the two threaded segments is arranged in the middle of the connecting pieces of the two groups of scissor lifting mechanisms. The same screw rod is used to control the movement of the scissor lifting mechanisms on both sides, which can effectively utilize the space, simplify the structure, and effectively reduce the failure rate.

[0009] As a further improvement of the physical therapy ladder, preferably the left and right ends of the footrest are connected to the footrest support through the central shaft arranged coaxially with the central axis, so that the footrest can be deflected in situ around the axis of the central shaft; the physical therapy ladder further comprises a turnover mechanism for controlling the deflection of the footrest, which can make all the footrests turn over so that the top surfaces of the footrests are on the same inclined plane, at which time the patient can perform climbing training.

[0010] For the physical therapy ladder with the footrests capable of being turned over into an inclined plane, the turnover mechanism comprises an adjusting arm assembly mounted on the footrest, the lower end of the adjusting arm assembly extending downward below the footrest; further comprising an inner support arranged below the footrest, the inner support being arranged in a stepped manner with n groups of guide rails; the guide rails have two sections of guide tracks I and II connected, wherein the guide track I is arranged horizontally, and the guide track II is inclined upward from the connection with the guide track I; the lower end of the adjusting arm assembly is constrained by the guide track, and during the movement of the footrest support, the adjusting arm assembly moves horizontally with the lower end constrained by the guide track I, and when the inner support moves, the lower end of the adjusting arm assembly enters the guide track II from the guide track I, at which time the footrest begins to gradually turn over. The guide track I in the guide track is arranged horizontally, and during the horizontal adjustment of the footrest, the adjusting arm assembly can only move horizontally under the restriction of the guide track I, so it will not interfere with the movement of the footrest, at the same time, the guide track I is also used to limit the adjusting arm assembly, so that the footrest is supported by the central shaft and the adjusting arm assembly at the same time, so that it will not be deflected when being stepped on.

[0011] As a preferred solution, the middle part of the guide rail has an open avoidance channel on the top, and the guide tracks are symmetrically arranged on the two side walls of the avoidance channel and communicate with the avoidance channel; the adjusting arm assembly is mounted on the back of the footrest through the mounting seat on the upper end, and the middle part is a connecting arm, the lower end of the connecting arm is transversely arranged with a fixed shaft, and the two ends of the fixed shaft are mounted with rollers, wherein the connecting arm is inserted into the avoidance channel, and the two avoidance channels are respectively located in the two side guide tracks. The avoidance channel and the connecting arm limit each other, which can play the role of mutual guidance, which can ensure that the rollers below do not come out of the avoidance channel, in addition, each connecting arm is mounted on the guide rail through the two rollers below, which ensures that the connecting arm and the guide rail have sufficient connection strength, and ensures that the footrest will not be deflected when the user steps on the footrest in the horizontal state or the inclined state.

[0012] As a preferred solution, the lower part of the inner support has a lower support rod extending along the width direction of the footrest, and a limiting clamp seat is arranged on the lower support rod, and the bottom of the inner support is provided with a lower cross bar extending along the width direction of the footrest, and the lower cross bar is movably clamped in the limiting clamp seat, so that the inner support can only move forward and backward along the width direction of the footrest, ensuring that the adjusting arm assembly and the guide rails on the inner support maintain the best contact state.

[0013] As a preferred solution, in the two adjacent footrests, the lower footrest is provided with an upper notch near one side of the upper footrest, the upper footrest is provided with a lower notch near one side of the lower footrest, and when the footrests are turned to form the slope, the upper notch and the lower notch are misaligned and fit together, which can reduce the gap between the adjacent footrests in the slope state, and at the same time make the edges of the adjacent footrests overlap together, increasing the stability of the slope. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings described herein are intended to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their description serve to explain the present application. They do not constitute an inappropriate limitation on the present application. In the drawings:

[0015] Figure 1 The overall structure of the automatically adaptive physical therapy ladder provided by the embodiment of the present application is shown in the schematic diagram;

[0016] Figure 2 For Figure 1 The internal structure of the middle step part is shown in the schematic diagram;

[0017] Figure 3 For Figure 2 The structure of the footrest part is shown in the schematic diagram;

[0018] Figure 4 For Figure 3 The installation structure of the scissor lifting mechanism in the footrest part is shown in the schematic diagram;

[0019] Figure 5 The adjustment process structure of the footboard in the footrest part is shown in the schematic diagram;

[0020] Figure 6 The structure of another footrest part provided by the embodiment is shown in the schematic diagram;

[0021] Figure 7 For Figure 2 The installation structure of the footrest part is shown in the schematic diagram;

[0022] Figure 8 For Figure 2 The installation structure of the footrest part support on the fixed base is shown in the schematic diagram;

[0023] Figure 9 For Figure 2 The rear side structure of the structure shown is shown in the schematic diagram;

[0024] Figure 10 The structure of the adjustment arm assembly is shown in the schematic diagram;

[0025] Figure 11 The structure of the inner support is shown in the schematic diagram;

[0026] Figure 12 for Figure 8 Schematic diagram of the upper limit positioning bracket of the middle and lower support rod;

[0027] Figure 13 This is a schematic diagram of the connection structure between the adjusting arm assembly and the guide rail;

[0028] Figure 14 A schematic diagram of the connection structure between the foot pedal and the inner support;

[0029] Figure 15 A schematic diagram of the structure for controlling the rotation of the foot pedal by the internal support;

[0030] Figure 16 This is a schematic diagram showing the state of the stepped section after it changes from a step to a slope.

[0031] In the diagram, the components are: 1. Step section; 5. Connecting platform; 3. Intermediate platform; 4. Railing; 5. Footrest; 6. Fixed base frame; 7. Footrest bracket; 8. Inner bracket; 9. Motor assembly; 10. Electric telescopic rod; 11. Linear bearing assembly; 12. Threaded sleeve; 13. Central shaft; 14. Screw I; 15. Lower support rod; 16. Limiting seat; 17. Lower crossbar; 18. Guide rail; 19. Adjusting arm assembly; 20. Connecting arm; 21. Fixed shaft; 22. Bearing; 23. Mounting seat; 24. Scissor lifting mechanism; 51. Support plate; 52. Foot pedal; 53. Enclosure; 54. Upper notch; 55. Lower notch; 161. Seat plate; 162. Clamping plate; 181. Clearance passage; 182. Guide rail I; 182. Guide rail II. 183, First support arm 241, Second support arm 242, Fixed hinge seat 243, Movable hinge seat 244, Threaded sleeve 245, Guide rail 246, Double-ended threaded rod 247, Drive motor 248, Threaded section 249, Shaft seat 250. Detailed Implementation

[0032] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0033] Figure 1 In one embodiment of the present invention, an automatically adaptive physical therapy staircase includes two symmetrically arranged step sections 1 on the left and right, with a horizontally arranged intermediate platform 3 between the two step sections 1. To ensure a good transition connection with the ground even after the staircase deforms, a top-sloping connecting platform 5 is provided in front of the lowest footrest 5 in each step section 1. Simultaneously, the highest footrest 5 is lower than the intermediate platform 3, and when deformed into a slope, the top edge of the footrest 5 connects to the edge of the intermediate platform 3. Additionally, railings 4 are provided on both sides of the upper part of the entire physical therapy staircase.

[0034] like Figure 2As shown, the used step part 1 includes a fixed chassis 6 and four stepping parts 5 distributed in a stepped manner, the physical therapy step can adjust the stride size, stride height, and can be transformed into a slope, first, the used fixed chassis 6 is used to longitudinally support all the stepping parts 5, and also provides a support frame for the stepping parts 5 to adjust the stride size; second, the used stepping part 5 itself has the function of adjusting the height to adjust the stride height, in addition, an inner support 8 is arranged below the stepping part 5, which is used to control the overturning of the stepping part 5, so as to realize the transformation between the step and the slope. Because the action ability of different patients is different, and the gait size required in different rehabilitation stages is different, the physical therapy step can adjust the state of the step part 1 through its own structure, so as to meet the different use requirements, in addition, it can also be transformed into a slope for the patient to walk on the slope.

[0035] Specifically, regarding the stride height adjustment function, as shown in the figure, Figure 3 As shown, the stepping part 5 of the embodiment includes a lower bracket body 51 and an upper stepping plate 52, wherein the top of the bracket body 51 is open, a lifting mechanism is installed on the inner bottom of the bracket body 51, and the stepping plate 52 is installed above the lifting mechanism; as shown in the figure, Figure 4 As shown, the used lifting mechanism includes two groups of scissor lifting mechanisms 24 arranged symmetrically in the length direction of the stepping part 5, and each group of scissor lifting mechanisms includes two scissor supports arranged symmetrically in the width direction of the stepping part 5, the scissor support includes a first support arm 241 and a second support arm 242 which are movably connected in X shape. In the same group of scissor lifting mechanisms 24, the lower ends of the two first support arms 241 are commonly hingedly connected to a fixed hinge seat 243 which is fixedly installed on the bracket body 51, and the upper ends are movably connected to a guide rail 246 arranged on the back of the stepping plate 52; the upper ends of the two second support arms 242 are commonly hingedly connected to another fixed hinge seat 243 which is fixedly installed on the stepping plate 52, and the lower ends are commonly hingedly connected to the same movable hinge seat 244, and the movable hinge seat 244 is movably arranged and a threaded sleeve 245 is arranged in the middle thereof. In addition, a double-headed threaded rod 247 is arranged on the inner bottom of the bracket body 51, both ends and the middle of the double-headed threaded rod 247 pass through the fixedly installed shaft seat 250, and a driving motor 248 is arranged at one end to control the rotation thereof. The two threaded segments 249 of the used double-headed threaded rod 247 have the same pitch and opposite rotation directions, as shown in the figure, Figure 5 As shown, when the driving motor 248 controls the rotation of the double-headed threaded rod 247 and the movable hinge seats 244 on both sides move towards each other, the stepping plate 52 moves upwards, in this embodiment, the displacement difference of the stepping plate 52 at the lower position is greater than that at the higher position during the adjustment of the stride height each time, and the height change of the stepping plate 52 from the lowest stepping part 5 to the highest stepping part 5 is an arithmetic progression.

[0036] Regarding the foot pedal 5, this embodiment also provides Figure 6 The structure shown has a ring of downward-extending panels 53 on the back of the foot pedal 52. These panels are located inside the bracket body 51 and together with the bracket body 51, they isolate the internal scissor lifting mechanism 24. This not only shields the internal structure but also provides a good working environment for the scissor lifting mechanism 24.

[0037] Regarding the stride size adjustment function, such as Figure 7 As shown, a central shaft 13 is coaxially arranged at the middle position of the two width surfaces of the support body 51, and is movably mounted on the inverted "П"-shaped foot pedal bracket 7 through the central shaft 13. In this structure, the support body 51 can rotate in place around the axis of the central shaft 13, but during the adjustment of the stride size, the flipping mechanism provided below the foot pedal 5 will limit the foot pedal 5, thereby ensuring that the foot pedal 5 will not deflect when stepped on. Furthermore, linear bearing assemblies 11 with horizontal axes are installed on both the left and right sides of the foot pedal bracket 7. The number of linear bearing assemblies 11 installed is appropriately increased according to the height of the foot pedal bracket 7 used. For example, four linear bearing assemblies 11 are installed on one side of the highest foot pedal bracket 7. In addition, a threaded sleeve 12 is installed in the middle of the crossbar at the bottom of each foot pedal bracket 7. Based on the aforementioned foot pedal bracket 7, four transverse rods extending along the width direction of the foot pedal 5 are symmetrically arranged on the left and right sides of the fixed base frame 6. The uppermost transverse rod is the shortest, and the lowermost transverse rod is the longest. The aforementioned linear bearing assembly 11 is mounted on the transverse rods of equal height, satisfying the horizontal movement requirements of all foot pedal brackets 7. In addition, a screw I14 driven by a motor assembly 9 is provided at the lower part of the fixed base frame 6. The screw I14 is parallel to the transverse rods and has four threaded segments with the same direction of rotation. Among these four threaded segments, the threaded segment with the smallest pitch has a pitch of 'a'. The pitch of all threaded segments increases sequentially in an arithmetic progression from the highest foot pedal 5 to the lowest foot pedal 5, with a tolerance of 'a'. Therefore, when the motor assembly 9 controls the screw I14 to rotate, the distance between any two adjacent foot pedals 5 changes equally, thus achieving the purpose of uniformly adjusting the stride size.

[0038] As to the function of transforming the steps into slopes, the aforementioned turnover mechanism comprises the adjusting arm assembly 19 and the inner support 8, which can not only assist the footrests 5 to be in a stable horizontal state, but also control all the footrests 5 to be turned over and form slopes. First, two adjusting arm assemblies 19 are symmetrically installed on the back of each bracket body 51, the main body of the adjusting arm assembly 19 is a connecting arm 20 which is inclined towards the footrest 5 with a lower position, the upper end of the connecting arm 20 is provided with a mounting seat 23 which is connected to the bracket body 51 through a bolt, the lower end is provided with a fixed shaft 21 in the transverse direction, and bearings 22 are installed on both ends of the fixed shaft 21 (i.e. the bearings 22 are located on both sides of the connecting arm 20). The inner support 8 is located below the footrest 5, the upper part of the inner support 6 is provided with four groups of guide rails 18 which are distributed in a stepped manner, and two electric telescopic rods 10 which control the movement of the inner support 8 are arranged on the fixed base 6. In order to prevent the inner support 8 from moving in the length direction of the footrest 5, the lower part of the fixed base 6 in this embodiment is provided with a lower support rod 15 which extends along the width direction of the footrest 5, and a limiting clamp seat 16 is arranged on the lower support rod 15, correspondingly, the inner support 8 is provided with a lower cross rod 17, as shown in Figure 12 , first, a seat plate 161 is fixedly arranged on the front surface of the lower support rod 15, which can lift the lower cross rod 17 and prevent the lower cross rod 17 from contacting the footrest support 7 (the transverse part of the footrest support 7 is located on the front surface of the lower support rod 15) arranged below, the limiting clamp seat 16 comprises two Z-shaped clamp plates 162 which are symmetrically arranged, the clamp plates 162 are bolted on the seat plate 161, which limit the lower cross rod 17 from the top and both sides, and ensure that the lower cross rod 17 can move smoothly.

[0039] As shown in Figure 13 , the front middle part of the guide rail 18 is provided with an open avoidance channel 181 with an open top, the width of which is slightly larger than the width of the connecting arm 20, which meets the smooth movement of the connecting arm 20 after being inserted, and guide rails are arranged on the two side walls of the avoidance channel 181, specifically, the guide rails are divided into horizontal guide rails I 182 and inclined guide rails II 183, and the connection between the two is smooth. As can be seen from Figure 12 , the lower part of the connecting arm 20 is inserted into the avoidance channel 181 from top to bottom, and the two bearings 22 at the lower end are located in the guide rails I 182 on both sides, at this time the footrest 5 is in a horizontal state as shown in Figure 14 , when the electric telescopic rod 10 controls the inner support 8 to move towards the middle platform 3, the bearings 22 move from the guide rails I 182 to the guide rails II 183, at this time the footrest 5 gradually turns over around the axis of the central shaft 13 as the axis of rotation, until the bearings 22 move to the highest part of the guide rails II 183, at this time the entire step part 1 presents a slope state as shown in Figure 16 , from Figure 15As can be seen, the upper notch 54 is arranged on the edge of the footboard 52 adjacent to the footboard 52 higher than the position of the footboard 52, the lower notch 55 is arranged on the edge of the footboard 52 adjacent to the footboard 52 lower than the position of the footboard 52, and the upper notch 54 and the lower notch 55 of the adjacent footboard 52 are arranged in the state shown in the figure. Figure 16 In the state shown in the figure, the upper notch 54 and the lower notch 55 of the adjacent footboard 52 are misaligned and superimposed together, which can not only minimize the gap of the slope, but also support the footboard 52 with each other.

[0040] It should be noted that the components for controlling the movement of each structure in this embodiment are all electric components, which are controlled by a controller in actual use. The controller can write programs a, b and c in the controller, the program a can control all drive motors 248 of at least one step part 1, the program b can control the motor assembly 9, and the program c can control the electric telescopic rod 10, so as to realize one-key control of automatic adjustment of the step height and the step size of the step part 1 to adapt to the training needs of different patients. The step part 1 can also be changed into a slope or a slope is changed into a step by one key, which is convenient for patients to carry out two different training. It should be noted that if the step part 1 is changed into a slope, each footboard part needs to be moved to the initial position in advance. Of course, the program a and the program b can be added in the program c to restore the original data in advance. At this time, when the operation of changing the step part 1 into a slope is executed by one key, the footboard part will be restored to the original state first, and then deformed.

[0041] As used in the specification and claims, certain terminology is used to refer to specific components. Those of ordinary skill in the art will appreciate that hardware manufacturers can refer to the same component using different names. The specification and claims do not serve as a means to distinguish components based on the names used to refer to them, but rather serve as a means to distinguish components based on their functional differences. As used throughout the specification and claims, "comprising" is a broad term intended to be open-ended. It specifically can be interpreted as "including, but not limited to." "Substantially" means within acceptable manufacturing tolerances.

[0042] It should be noted that the terms "comprise", "contain" or any other variant thereof are intended to cover non-exclusive inclusions, so that the goods or systems comprising a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such goods or systems. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the goods or system comprising the element.

[0043] The foregoing description illustrates and describes several preferred embodiments of the present application, but it is to be understood that the application is not limited to the above-described forms, and that it should not be seen as excluding other embodiments, but rather as being applicable in a variety of other combinations, modifications and environments, and capable of being altered in the scope of the inventive concept described herein, by means of the teachings contained herein or knowledge of the relevant art, without departing from the spirit and scope of the application. Any alterations and further modifications of the application, though not expressly described herein, should be considered within the scope of the application as defined by the following claims.

Claims

1. An automatically adaptable physical therapy ladder, characterized in that: The physical therapy ladder comprises a fixed base and n step parts arranged in a step shape, each of the step parts is independently installed on an inverted "П" type step part support, and the left and right sides of the step part support are provided with sliding assemblies; the left and right sides of the fixed base are symmetrically provided with a plurality of transverse rod members extending along the width direction of the step part, the sliding assemblies are installed on the transverse rod members and can move horizontally along the transverse rod members; a screw rod I driven by a motor assembly is arranged on the fixed base and is parallel to the transverse rod members; the screw rod I has n thread segments with the same rotation direction, the pitch of the thread segment with the smallest pitch is a, the pitches of all the thread segments are sequentially increased in an arithmetic sequence, and the tolerance is a; a threaded sleeve matched with each thread segment is arranged on each step part support.

2. The automatically adjustable physical therapy ladder of claim 1, wherein: The step part comprises a lower supporting part and an upper step plate, a lifting mechanism is installed on the supporting part, the upper part of the lifting mechanism is connected to the step plate, the lifting mechanism can horizontally lift the step plate to adjust the distance between the step plate and the supporting part, and the heights of the step plates controlled by the lifting mechanisms in the n step parts change in an arithmetic sequence.

3. The automatically adjustable physical therapy ladder of claim 2, wherein: The lifting mechanism comprises two groups of scissor lifting mechanisms symmetrically arranged in the length direction of the step part, each group of scissor lifting mechanisms comprises two scissor supports symmetrically arranged in the width direction of the step part, the scissor support comprises a first support arm and a second support arm connected in an X shape, in the same group of scissor lifting mechanisms, the upper end and the lower end of the first side of the first support arm and the second support arm are fixedly connected to the step plate and the supporting groove body through fixed hinge seats, and the upper end and the lower end of the second side are movably arranged, and two of the lower ends are free ends and are connected by the same connecting piece; the scissor lifting mechanism further comprises an adjusting assembly for controlling the connecting pieces on both sides to be close to or away from each other.

4. The automatically adjustable physical therapy ladder of claim 3, wherein: The adjusting assembly comprises a double-thread rod installed on the supporting part in the length direction of the step part, and a driving motor for driving the double-thread rod to rotate, the two thread segments of the double-thread rod have the same pitch and opposite rotation directions; a threaded sleeve matched with the two thread segments is arranged in the middle part of the connecting piece of the two groups of scissor lifting mechanisms.

5. The automatically adjustable physical therapy ladder of claim 2, wherein: The supporting part is a groove structure with an open top, and the lifting mechanism is hidden in the groove structure when lowered.

6. The automatically adjustable physical therapy ladder of any one of claims 1-5, wherein: The left and right ends of the step part are connected to the step part support through a central shaft arranged on the same axis, so that the step part can be deflected in place around the axis of the central shaft; the physical therapy ladder further comprises a turnover mechanism for controlling the deflection of the step part, which can turn all the step parts to the same inclined plane.

7. The automatically adjustable physical therapy ladder of claim 6, wherein: The turnover mechanism comprises an adjusting arm assembly installed on the footrest part, the lower end of the adjusting arm assembly extending downward below the footrest part; and an inner support arranged below the footrest part, the inner support being provided with n groups of guiding rails in a stepped manner; the guiding rail has two guiding tracks I and II connected together, the guiding track I being horizontally arranged, and the guiding track II being inclined upward from the connection with the guiding track I; the lower end of the adjusting arm assembly is constrained by the guiding track, and during the movement of the footrest part support, the adjusting arm assembly moves horizontally with the lower end being constrained by the guiding track I, and when the inner support moves, the lower end of the adjusting arm assembly enters the guiding track II from the guiding track I, at which time the footrest part starts to gradually turn over.

8. The automatically adjustable physical therapy ladder of claim 7, wherein: The middle part of the guiding rail has an open avoidance channel, the guiding tracks are symmetrically arranged on the two side walls of the avoidance channel and communicate with the avoidance channel; the adjusting arm assembly is installed on the back of the footrest part through the mounting seat at the upper end, the middle part is a connecting arm, the lower end of the connecting arm is transversely provided with a fixed shaft, and the two ends of the fixed shaft are provided with rollers, the connecting arm is inserted into the avoidance channel, and the two avoidance channels are respectively located in the two guiding tracks.

9. The automatically adjustable physical therapy ladder of claim 7, wherein: The lower part of the inner support has a lower support rod extending along the width direction of the footrest part, and a limiting clamping seat is arranged on the lower support rod; the bottom of the inner support is provided with a lower cross bar extending along the width direction of the footrest part, and the lower cross bar is movably clamped in the limiting clamping seat, so that the inner support can only move forward and backward along the width direction of the footrest part.

10. The automatically adjustable physical therapy ladder of claim 6, wherein: In the two adjacent footrest parts, the upper edge of the lower footrest part near the upper footrest part is provided with an upper notch, and the lower edge of the upper footrest part near the lower footrest part is provided with a lower notch, and when the footrest part is turned over to form a slope, the upper notch and the lower notch are misaligned and combined.

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