Foot passive trainer

Abstract

This invention belongs to the field of foot training technology, and in particular to a passive foot trainer, comprising a shell and two sets of adjustment components symmetrically installed within the shell. Through the coordination of structures such as the adjusting rod, the active gear, and the hinge rod, one end of the support plate can slowly descend while the other end slowly rises, facilitating the lifting of the patient's heel and lowering of the toes. Simultaneously, through the coordination of structures such as the worm gear, worm wheel, gear, and ring rack, the two adjustment seats can reciprocate within the shell in a left-right range, following the rotating rod, allowing for comprehensive adjustment of the patient's foot posture. This stretches the muscles and tendons of the patient's foot during training, improving the effectiveness of foot training. The combination of structures such as the fixing sleeve, heel bracket, rubber plate, and elastic band facilitates foot fixation during use, making this trainer suitable for patients with different foot sizes.

Description

Technical Field

[0001] This invention belongs to the field of foot training technology, and specifically relates to a passive foot trainer. Background Technology

[0002] Venous thrombosis refers to the abnormal clotting of blood in deep veins, a disease of lower extremity venous return obstruction. After thrombosis, except for a few that can dissolve spontaneously or remain localized to the site of occurrence, most will spread to the main deep veins of the entire limb. If not diagnosed and treated in time, most will develop into post-thrombotic sequelae, affecting the patient's quality of life for a long time. To avoid the development of various diseases, it is necessary to exercise the feet frequently. For people with difficulty walking, passive foot training is particularly important. Traditional foot training usually only massages the foot muscles, but it cannot effectively stretch the foot muscles, nor can it adjust the ankle posture according to the patient's actual feeling, thus reducing the training effect.

[0003] To address the aforementioned problems, this application proposes a passive foot trainer. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a passive foot trainer that is suitable for patients with different foot sizes. It stretches the foot muscles and tendons during training, comprehensively adjusts ankle posture, significantly improves foot stretching effects, promotes blood circulation in the foot, and enhances the effectiveness of foot training for patients.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a passive foot trainer, comprising a housing and two sets of adjustment components symmetrically installed within the housing;

[0006] The adjustment assembly includes a fixed base, a mounting plate, a servo motor, an adjustment seat, an adjustment rod, a drive gear, a rack, a slider, a hinge rod, a hinge ear, a hinge block, a hinge slide, and a support plate. The fixed base is housed within the housing. Adjustment seats are mounted at both ends of the fixed base. Adjustment rods are slidably connected to grooves on the surfaces of the two adjustment seats. A hinge ear is mounted on one side of each adjustment rod. The mounting plate is mounted on one side of the fixed base. The servo motor is mounted on the surface of the mounting plate. The drive gear is mounted on the rotating shaft of the servo motor. The adjustment seat engages with the rack located within the fixed base. Slider blocks are provided on both sides of the rack and within the fixed base. Hinges are hinged to the surfaces of both sliders. One end of one hinge rod is hinged to one hinge lug, and one end of the other hinge rod is hinged to the other hinge lug. A support plate is provided at the top of the adjustment seat. A hinge block and a hinge slide are mounted on the bottom surface of the support plate. The hinge block is hinged to one of the adjusting rods, and the hinge slide is hinged to the other adjusting rod.

[0007] As a preferred embodiment of the passive foot trainer of the present invention, both sides of the rack are integrally formed with limiting strips, the inner wall surface of the fixing base is provided with a limiting groove that matches the limiting strips, and the rack is slidably connected to the fixing base through the limiting strips and the limiting grooves.

[0008] As a preferred embodiment of the passive foot trainer of the present invention, a limiting slide rod is slidably connected in the through hole opened on the surface of the slider, both ends of the limiting slide rod are installed in the fixed seat, and the surface of the rack is provided with a through groove that matches the limiting slide rod.

[0009] As a preferred embodiment of the passive foot trainer of the present invention, a spring is sleeved on the outer surface of the limiting slide rod, one end of the spring abuts against the fixed seat, and the other end of the spring abuts against one side surface of the slider.

[0010] As a preferred embodiment of the passive foot trainer of the present invention, the inner wall surface of the adjustment seat is integrally formed with a guide block, the surface of the adjustment rod is provided with a guide groove that matches the guide block, and the adjustment rod is slidably connected in the adjustment seat through the guide block and the guide groove.

[0011] A preferred embodiment of the passive foot trainer of the present invention further includes a flipping assembly installed on one side of the fixed seat. The flipping assembly includes a worm, a worm wheel, a transmission rod, a gear, a ring rack, a fixing frame, and a rotating rod. The transmission rod is provided on one side of the fixed seat. The fixing frame is rotatably connected to both ends of the transmission rod's outer surface. The two fixing frames are respectively installed on the same side surface of the two adjustment seats. The worm wheel is installed on the outer surface of the transmission rod, and the worm is meshed with the worm. One end of the worm is connected to the rotating shaft of the servo motor. Two gears are symmetrically installed on the outer surface of the transmission rod. The ring rack is installed on the same side surface of the two adjustment seats, and the two gears mesh with the two ring racks respectively. The rotating rod is installed on the outer surface of the two adjustment seats on opposite sides. The rotating rod is rotatably connected to the outer shell via bearing A.

[0012] As a preferred embodiment of the passive foot trainer of the present invention, the end of the worm gear away from the servo motor is rotatably connected to an L-shaped rotating frame, one end of which is mounted on the bottom surface of the adjustment seat.

[0013] As a preferred embodiment of the passive foot trainer of the present invention, a limiting rod is installed on the side surface of each of the two adjusting seats that are far apart from each other. An arc-shaped limiting member is sleeved on the outer surface of the limiting rod. The arc-shaped limiting member is installed inside the outer shell, and an arc-shaped groove matching the limiting rod is opened on the surface of the arc-shaped limiting member. The limiting rod is slidably connected to the surface of the arc-shaped limiting member through the arc-shaped groove.

[0014] As a preferred embodiment of the passive foot trainer of the present invention, it further includes a fixing assembly mounted on the surface of the support plate. The fixing assembly includes a fixing sleeve, a heel bracket, a motor, a screw, a screw block, and a retainer. The motor is mounted on the bottom surface of the support plate. The output shaft of the motor is rotatably connected to the screw. The end of the screw away from the motor is connected to the retainer mounted on the bottom surface of the support plate via a bearing B. The screw block is threadedly connected to the outer surface of the screw. The screw block passes through an adjustment groove opened on the surface of the support plate and is connected to the heel bracket provided on the surface of the support plate. The fixing sleeve is mounted on the surface of the support plate and on one side of the heel bracket.

[0015] As a preferred embodiment of the passive foot trainer of the present invention, the heel bracket has a rubber plate integrally formed on the side near the fixed rubber sleeve and on the surface of the support plate. An elastic band is installed on the surface of the support plate, one end of which passes through the support plate and extends to the bottom of the support plate, and surrounds the surface of the take-up roller installed on the outer surface of the screw.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By adjusting the cooperation of the top rod, drive gear and hinge rod, the support plate can be slowly lowered at one end and slowly raised at the other end, which makes it easier to lift the patient's heel and lower the toes, thereby stretching the foot muscles and tendons during training, adjusting the ankle posture, significantly improving the stretching effect of the foot and promoting blood circulation in the foot.

[0018] 2. Through the cooperation of worm gear, worm wheel, gear and ring rack, the two adjustment seats can swing back and forth within the outer shell with the rotating rod, which can adjust the patient's foot posture in all directions, stretch the patient's foot muscles and tendons during training, and further improve the effect of the patient's foot training.

[0019] 3. The combination of fixed rubber sleeves, heel supports, rubber plates, and elastic bands facilitates foot fixation during use, making this training device suitable for patients with different foot sizes. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a partial structural diagram of the interior of the outer shell in this invention;

[0023] Figure 3 This is a partial structural diagram of the interior of the outer shell in this invention;

[0024] Figure 4 This is a schematic diagram of the structure of the support plate, the fixed base, and the adjusting base in this invention;

[0025] Figure 5 This is a schematic diagram of the structure of the spring, rack, slider, and drive gear in this invention;

[0026] Figure 6 This is a schematic diagram of the structure of the hinge block, hinge slide, and support plate in this invention;

[0027] Figure 7 This is a schematic diagram of the structure of the worm gear, worm, transmission rod, and rotating rod in this invention;

[0028] Figure 8 This is a schematic diagram of the structure of the fixing rubber sleeve, elastic band and heel bracket in this invention;

[0029] Figure 9 This is a schematic diagram of the structure of the screw, screw block, and take-up roller in this invention;

[0030] Figure 10 This is a schematic diagram of the structure of the limiting strip, limiting groove, and rack in this invention;

[0031] In the picture:

[0032] 1. Outer shell;

[0033] 2. Adjustment assembly; 21. Fixed base; 22. Mounting plate; 23. Servo motor; 24. Adjustment seat; 25. Adjustment top rod; 26. Drive gear; 27. Rack; 28. Slider; 29. ​​Hinge rod; 201. Hinge ear; 202. Limiting slide rod; 203. Spring; 204. Guide block; 205. Guide groove; 206. Hinge block; 207. Hinge slide; 208. Support plate; 209. Limiting strip; 211. Limiting groove;

[0034] 3. Tilting assembly; 31. Worm gear; 32. Worm wheel; 33. Transmission rod; 34. Rotating frame; 35. Gear; 36. Ring rack; 37. Fixing frame; 38. Rotating rod; 39. Limiting rod; 301. Arc-shaped limiting component; 302. Arc-shaped groove;

[0035] 4. Fixing components; 41. Fixing rubber sleeve; 42. Heel bracket; 43. Rubber plate; 44. Elastic band; 45. Motor; 46. Screw; 47. Take-up roller; 48. Screw block; 49. Cage; 401. Adjustment groove. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figure 1 As shown;

[0039] A passive foot trainer includes a housing 1.

[0040] In this implementation plan: In order to avoid the occurrence of various diseases, it is necessary to exercise the feet frequently. For people with difficulty walking, passive foot training is particularly important. Traditional foot training usually only massages the muscles of the feet, but it cannot effectively stretch the muscles of the feet, nor can it adjust the ankle posture according to the patient's actual feeling, thus reducing the training effect. Therefore, in order to solve this technical problem, adjustment component 2, flipping component 3 and fixing component 4 are added to this application.

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown:

[0042] In conjunction with the above, to facilitate the simulation of forward and backward movements of the patient's foot and to change the posture of the ankle, two sets of adjustment components 2 are symmetrically installed inside the outer casing 1. Each adjustment component 2 includes a fixed base 21, a mounting plate 22, a servo motor 23, an adjustment base 24, an adjustment rod 25, a drive gear 26, a rack 27, a slider 28, a hinge rod 29, a hinge ear 201, a hinge block 206, a hinge slide 207, and a support plate 208. The outer casing 1 contains a fixed base 21, with adjustment bases 24 installed at both ends. Adjustment rods 25 are slidably connected to grooves on the surfaces of both adjustment bases 24. A hinge ear 201 is installed on one side of the adjustment rod 25, and a mounting plate 22 is installed on one side of the fixed base 21. A servo motor 23 is mounted on the surface of the servo motor 23. A drive gear 26 is mounted on the rotating shaft of the servo motor 23. The drive gear 26 meshes with a rack 27 located in the fixed seat 21. Sliders 28 are provided on both sides of the rack 27 and within the fixed seat 21. A hinge rod 29 is hinged to the surface of each of the two slides 28. One end of one hinge rod 29 is hinged to one hinge ear 201, and one end of the other hinge rod 29 is hinged to the other hinge ear 201. A support plate 208 is provided at the top of the adjusting seat 24. A hinge block 206 and a hinge slide 207 are mounted on the bottom surface of the support plate 208. The hinge block 206 is hinged to one adjusting rod 25, and the hinge slide 207 is hinged to the other adjusting rod 25.

[0043] In this implementation scheme: When the trainer is in use, the patient's foot is first placed on the surface of the support plate 208, and the servo motor 23 is activated. The drive gear 26 mounted on the rotating shaft of the servo motor 23 drives the rack 27 to slide to one side within the fixed seat 21. This pushes a slider 28 located on the side of the rack 27 within the fixed seat 21 to slide to the same side. At this time, the hinge rod 29, which is hinged to this slider 28, pushes the adjusting rod 25 to slide upward within the adjusting seat 24. This causes one side of the support plate 208 to slowly tilt around the hinge block 206, thereby raising the patient's foot (toes). Conversely, when the servo motor 23 reverses, the raised end of the support plate 208 slowly lowers, and the other end of the support plate 208 slowly tilts upward, facilitating the raising of the patient's heel and the lowering of the toes. This stretches the muscles and tendons of the foot during training, adjusts the ankle posture, significantly improves the foot stretching effect, and promotes blood circulation in the foot.

[0044] In an optional embodiment: both sides of the rack 27 are integrally formed with limiting strips 209, and the inner wall surface of the fixing seat 21 is provided with a limiting groove 211 that matches the limiting strips 209, and the rack 27 is slidably connected to the fixing seat 21 through the limiting strips 209 and the limiting grooves 211.

[0045] In this embodiment: Based on this setting, when the servo motor 23 starts and causes the drive gear 26 to drive the rack 27 to move within the fixed base 21, the limiting strips 209 integrally formed on both sides of the rack 27 can move within the limiting grooves 211 opened on the inner wall surface of the fixed base 21. This helps to improve the stability of the rack 27 during movement and prevents the rack 27 from getting stuck during movement.

[0046] In an optional embodiment: a limiting slide rod 202 is slidably connected in a through hole on the surface of the slider 28, both ends of the limiting slide rod 202 are installed in the fixed seat 21, and a through groove matching the limiting slide rod 202 is provided on the surface of the rack 27.

[0047] In this embodiment: Based on this setting, when the rack 27 moves and pushes the slider 28 to slide to the opposite side, the slider 28 can slide on the surface of the limiting slide bar 202, and the movement of the slider 28 is limited by the limiting slide bar 202 to prevent the slider 28 from sliding off the fixed seat 21. At the same time, the through groove opened on the surface of the rack 27 facilitates the sliding of the rack 27 to the opposite side, and the through groove can prevent the limiting slide bar 202 from blocking the rack 27, which is convenient for adjustment.

[0048] In an optional embodiment: a spring 203 is sleeved on the outer surface of the limiting slide bar 202, one end of the spring 203 abuts against the fixed seat 21, and the other end of the spring 203 abuts against one side surface of the slider 28.

[0049] In this embodiment: Based on this setting, when the rack 27 moves and pushes the slider 28 to slide to the opposite side, the slider 28 can push the spring 203 on the surface of the limit slider 202 to compress (store energy). When the servo motor 23 reverses, the slider 28 can move in the opposite direction due to the elasticity of the spring 203 itself, so that the slider 28 can be reset.

[0050] In an optional embodiment: the inner wall surface of the adjusting seat 24 is integrally formed with a guide block 204, and the surface of the adjusting rod 25 is provided with a guide groove 205 that matches the guide block 204, and the adjusting rod 25 is slidably connected in the adjusting seat 24 through the guide block 204 and the guide groove 205.

[0051] In this embodiment: Based on this setting, when the hinge rod 29 pushes the adjusting rod 25 to slide upward in the adjusting seat 24 during use, the adjusting rod 25 can slide more stably in the adjusting seat 24 under the limiting and guiding effect of the set guide block 204 and guide groove 205.

[0052] like Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown:

[0053] In conjunction with the above, to further improve the stretching effect on the patient's ankle and foot muscles, a flipping assembly 3 is also included, installed on one side of the fixed seat 21. The flipping assembly 3 includes a worm 31, a worm wheel 32, a transmission rod 33, a gear 35, a ring rack 36, a fixing frame 37, and a rotating rod 38. A transmission rod 33 is provided on one side of the fixed seat 21. The outer surfaces of both ends of the transmission rod 33 are rotatably connected to the fixing frame 37. The two fixing frames 37 are respectively installed on the same side surface of the two adjusting seats 24. A worm wheel 32 is installed on the outer surface of the transmission rod 33. The surface of the worm wheel 32 is meshed with the worm 31. One end of the worm 31 is connected to the rotating shaft of the servo motor 23. Two gears 35 are symmetrically installed on the outer surface of the transmission rod 33. A ring rack 36 is installed on the same side surface of the two adjusting seats 24. The two gears 35 mesh with the two ring racks 36 respectively. A rotating rod 38 is installed on the outer surface of the two adjusting seats 24 that are far apart from each other. The rotating rod 38 is rotatably connected to the outer casing 1 through a bearing A.

[0054] In this implementation scheme: while the servo motor 23 repeatedly raises and lowers the patient's toes and heels in both forward and reverse directions, the worm gear 31 mounted on the rotating shaft of the servo motor 23 rotates. This causes the worm gear 31 to drive the worm wheel 32, along with the transmission rod 33, to rotate on the surfaces of the two fixed frames 37. Consequently, the gear 35 mounted on the surface of the transmission rod 33 rotates on the surface of the ring rack 36. This allows the two adjusting seats 24 to swing back and forth within the housing 1, following the rotating rod 38. Simultaneously, the adjusting component 2 allows for the repeated raising and lowering of the patient's heel or toes, while also enabling the patient's feet to swing back and forth in a lateral range. This allows for comprehensive adjustment of the patient's foot posture, stretching the muscles and tendons of the patient's feet during training, and further improving the effectiveness of foot training.

[0055] In an optional embodiment, the end of the worm gear 31 away from the servo motor 23 is rotatably connected to an L-shaped rotating frame 34, one end of which is mounted on the bottom surface of the adjusting seat 24.

[0056] In this embodiment: Based on this setting, the L-shaped rotating frame 34 enables the servo motor 23 to drive the worm 31 to rotate smoothly, while also ensuring that the worm 31 and the worm wheel 32 are always in a meshing transmission state.

[0057] In an optional embodiment: Limiting rods 39 are installed on the surfaces of the two adjusting seats 24 that are far apart from each other. An arc-shaped limiting member 301 is sleeved on the outer surface of the limiting rod 39. The arc-shaped limiting member 301 is installed inside the outer shell 1, and an arc-shaped groove 302 matching the limiting rod 39 is opened on the surface of the arc-shaped limiting member 301. The limiting rod 39 is slidably connected to the surface of the arc-shaped limiting member 301 through the arc-shaped groove 302.

[0058] In this embodiment: Based on this setting, when the two adjusting seats 24 follow the rotating rod 38 to swing back and forth within the outer casing 1, the limiting rod 39 installed on one side surface of the two adjusting seats 24 can move within the arc groove 302 opened on the surface of the arc limiting member 301, which is beneficial to improving the stability of the adjusting seats 24 when swinging.

[0059] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown:

[0060] In conjunction with the above, in order to fix the patient's foot on the support plate 208 during use of the trainer, and to facilitate use by people with different foot sizes, a fixing component 4 is also included, which is installed on the surface of the support plate 208. The fixing component 4 includes a fixing sleeve 41, a heel bracket 42, a motor 45, a screw 46, a screw block 48, and a retainer 49. The motor 45 is installed on the bottom surface of the support plate 208. The output shaft of the motor 45 is rotatably connected to the screw 46. The end of the screw 46 away from the motor 45 is connected to the retainer 49 installed on the bottom surface of the support plate 208 through a bearing B. The screw block 48 is threadedly connected to the outer surface of the screw 46. The screw block 48 passes through an adjustment groove 401 opened on the surface of the support plate 208 and is connected to the heel bracket 42 set on the surface of the support plate 208. The fixing sleeve 41 is installed on the surface of the support plate 208 and on one side of the heel bracket 42.

[0061] In this implementation scheme: When using this trainer, first place the patient's foot on the surface of the support plate 208, so that the patient's heel is in the heel bracket 42. By starting the motor 45, the screw 46 rotates, and the screw block 48 drives the heel bracket 42 on the surface of the support plate 208 to move to one side, so that the heel bracket 42 drives the patient's foot to be inserted into the fixing sleeve 41, thereby fixing the patient's foot. With the help of the adjustment component 2 and the flipping component 3, the patient's foot is trained, which is convenient for people with different foot sizes.

[0062] In an optional embodiment: a rubber plate 43 is integrally formed on the side of the heel bracket 42 near the fixing sleeve 41 and on the surface of the support plate 208. An elastic band 44 is installed on the surface of the support plate 208. One end of the elastic band 44 passes through the support plate 208 and extends to the bottom of the support plate 208, and surrounds the surface of the take-up roller 47 installed on the outer surface of the screw 46.

[0063] In this embodiment: Based on this setting, the patient's heel is placed inside the heel bracket 42, and the patient's foot is placed on the rubber plate 43. The rubber plate 43 integrally formed on the surface of the heel bracket 42 drives the patient's foot to move towards the side of the fixing sleeve 41, preventing the heel bracket 42 from creating a gap with the support plate 208 when it moves, thus preventing injury to the patient's foot. At the same time, when fixing the patient's foot, the winding roller 47 installed on the outer surface of the screw 46 can wind up one end of the elastic band 44, so that the elastic band 44 is tightened around the patient's foot, which can further improve the stability of fixing the patient's foot.

[0064] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A foot passive trainer comprising a casing (1), characterized in that: Two sets of adjusting assemblies (2) are symmetrically arranged in the shell (1); The adjusting assembly (2) comprises a fixing seat (21), a mounting plate (22), a servo motor (23), an adjusting seat (24), an adjusting top rod (25), a driving gear (26), a rack (27), a sliding block (28), a hinged rod (29), a hinged lug (201), a hinged block (206), a hinged sliding seat (207) and a supporting plate (208), the fixing seat (21) is arranged in the shell (1), the adjusting seat (24) is arranged at both ends of the fixing seat (21), the adjusting top rod (25) is slidably connected in the groove formed in the surface of the adjusting seat (24), the hinged lug (201) is arranged on one side surface of the adjusting top rod (25), the mounting plate (22) is arranged on one side of the fixing seat (21), the servo motor (23) is arranged on the surface of the mounting plate (22), the driving gear (26) is arranged on the rotating shaft of the servo motor (23), the driving gear (26) is engaged with the rack (27) arranged in the fixing seat (21), the sliding block (28) is arranged at both sides of the rack (27) and in the fixing seat (21), the hinged rod (29) is hinged to the surface of the sliding block (28), one end of one hinged rod (29) is hinged to one hinged lug (201), one end of the other hinged rod (29) is hinged to the other hinged lug (201), the supporting plate (208) is arranged at the top end of the adjusting seat (24), the hinged block (206) and the hinged sliding seat (207) are arranged on the bottom surface of the supporting plate (208), the hinged block (206) is hinged to one adjusting top rod (25), and the hinged sliding seat (207) is hinged to the other adjusting top rod (25).

2. Foot passive trainer according to claim 1, characterized in that: Limiting strips (209) are integrally formed on the surfaces of the rack (27), limiting grooves (211) are formed in the inner wall surface of the fixing seat (21) and matched with the limiting strips (209), and the rack (27) is slidably connected in the fixing seat (21) through the limiting strips (209) and the limiting grooves (211).

3. The foot passive trainer according to claim 1, characterized in that: Limiting sliding rods (202) are slidably connected in the through holes formed in the surface of the sliding block (28), the limiting sliding rods (202) are arranged at both ends of the fixing seat (21), and through grooves matched with the limiting sliding rods (202) are formed in the surface of the rack (27).

4. Foot passive trainer according to claim 3, characterized in that: Springs (203) are arranged on the outer surfaces of the limiting sliding rods (202), one end of each spring (203) abuts against the fixing seat (21), and the other end of each spring (203) abuts against one side surface of the sliding block (28).

5. The foot passive trainer according to claim 1, characterized in that: The inner wall surface of the adjusting seat (24) is integrally formed with a guide block (204), the surface of the adjusting top rod (25) is provided with a guide groove (205) matched with the guide block (204), and the adjusting top rod (25) is slidably connected in the adjusting seat (24) through the guide block (204) and the guide groove (205).

6. The foot passive trainer according to claim 1, characterized in that: The fixed seat (21) is provided with the transmission rod (33), the outer surfaces of both ends of the transmission rod (33) are rotatably connected with the fixed frame (37), the two fixed frames (37) are respectively installed on the same side surface of the two adjusting seats (24), the outer surface of the transmission rod (33) is provided with the worm wheel (32), the surface of the worm wheel (32) is meshingly connected with the worm (31), one end of the worm (31) is connected with the rotating shaft of the servo motor (23), the outer surface of the transmission rod (33) is symmetrically provided with two gear wheels (35), the same side surface of the two adjusting seats (24) is provided with the ring-shaped gear rack (36), the two gear wheels (35) are respectively meshed with the two ring-shaped gear racks (36), the outer surfaces of the sides of the two adjusting seats (24) away from each other are provided with the rotating rod (38), and the rotating rod (38) is rotatably connected in the shell (1) through a bearing A.

7. Foot passive trainer according to claim 6, characterized in that: The end of the worm (31) away from the servo motor (23) is rotatably connected with an L-shaped rotating frame (34), and one end of the rotating frame (34) is installed on the bottom surface of the adjusting seat (24).

8. The foot passive trainer according to claim 6, characterized in that: The outer surface of the limiting rod (39) is provided with an arc-shaped limiting piece (301), the arc-shaped limiting piece (301) is installed in the shell (1), the surface of the arc-shaped limiting piece (301) is provided with an arc-shaped groove (302) matched with the limiting rod (39), and the limiting rod (39) is slidably connected on the surface of the arc-shaped limiting piece (301) through the arc-shaped groove (302).

9. The foot passive trainer according to claim 1, characterized in that: Also include the installation in the support plate (208) surface fixed assembly (4), the fixed assembly (4) includes fixed rubber sleeve (41), heel frame (42), motor (45), screw rod (46), screw block (48) and retainer (49), the bottom surface of the support plate (208) is provided with the motor (45), the output shaft of the motor (45) is rotatably connected with the screw rod (46), the screw rod (46) is connected with the retainer (49) installed on the bottom surface of the support plate (208) through bearing B away from the motor (45), the outer surface of the screw rod (46) is threadedly connected with the screw block (48), the screw block (48) penetrates the adjusting groove (401) opened on the surface of the support plate (208), and is connected with the heel frame (42) arranged on the surface of the support plate (208), the surface of the support plate (208) and located on one side of the heel frame (42) is rotatably connected with the fixed rubber sleeve (41).

10. Foot passive trainer according to claim 9, characterized in that: The rubber plate (43) is integrally formed on the surface of the support plate (208) near the side of the fixed rubber sleeve (41) and the heel frame (42), the elastic belt (44) is installed on the surface of the support plate (208), one end of the elastic belt (44) penetrates the support plate (208), extends to the bottom of the support plate (208), and surrounds the surface of the winding roller (47) arranged on the outer surface of the screw rod (46).

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