Knee-shoulder-forearm rotation muscle group strength training device

Abstract

The present invention discloses a knee-shoulder-forearm rotator cuff strength training device, comprising a seat, a knee joint training device, a shoulder joint training device, and a forearm training device. The knee joint training device, the shoulder joint training device, and the forearm training device share a resistance mechanism via a switching device, enabling switching between three training modes. The training device of the present invention can provide targeted resistance training for the rotator cuff muscles of the knee, shoulder, and forearm. During training, the user can easily switch between training the three rotator cuff muscles, even simultaneously, without having to move to other equipment for training, making it easier to use.

Description

Technical Field

[0001] The invention relates to the technical field of sports fitness equipment, in particular to a knee-shoulder-forearm rotation muscle group strength training device. Background Art

[0002] Strength is the most basic physical quality for the human body to maintain exercise, and it is also the basis of other physical qualities such as speed, endurance, and agility. Strength plays an important role in promoting the physical health of the general population and improving the competitive ability of athletes. Therefore, national policies and experts and scholars have always focused on enhancing people's strength.

[0003] Muscle strength training has always occupied an important position among amateur fitness enthusiasts and athletes. Strengthening muscle strength is an important means for amateur fitness enthusiasts to shape their body shape and for athletes to improve their competitive level. At present, most muscle strength training content in the fields of fitness and sports emphasizes the training of joint flexor and extensor muscles, but neglects the training of strengthening joint rotation muscles. Although the flexor and extensor muscles of the joints are the most used, practical, and functional muscle groups in the human body, for some physical activities with a large range of joint movements, the knee, shoulder, and forearm rotation muscles play an important role in overall movement stability and the prevention of sports injuries. However, there are currently few devices on the market that are specifically used to train joint rotation muscles. On the other hand, the functions of the related equipment on the market are relatively simple, and usually one function corresponds to one device. At present, there are no reports on the market that can provide targeted training for the knee, shoulder, and forearm rotation muscles. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a knee-shoulder-forearm rotator cuff strength training device which can effectively train the rotator cuff muscles of the knee joint, shoulder joint and forearm, so as to strengthen the rotator cuff muscles and prevent sports injuries.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A knee-shoulder-forearm rotational muscle group strength training device comprises a seat, a knee joint training device, a shoulder joint training device and a forearm training device. The knee joint training device, the shoulder joint training device and the forearm training device share a resistance mechanism through a switching device to achieve switching between three training modes; wherein:

[0007] The knee joint training device includes a knee support mechanism, a foot pedal, and a knee transmission mechanism that enables the foot pedal to rotate left and right with the heel as a fulcrum. The knee transmission mechanism includes a roller guide pair arranged below the foot pedal, a knee step gear, a knee spline gear shaft kit that meshes with the knee step gear, a knee wire wheel fixed to the knee spline gear shaft kit, and a knee seat bearing for mounting the knee step gear and the knee spline gear shaft kit. The knee step gear is mounted on a gear shaft fixed to the back of the foot pedal heel. A knee transmission wire is wound around the knee wire wheel, and the knee transmission wire is connected to the switching device via a guide.

[0008] The shoulder joint training device includes a shoulder support mechanism, a horizontal rotation operating rod, and a shoulder transmission mechanism for causing the horizontal rotation operating rod to rotate horizontally. The shoulder transmission mechanism includes a shoulder step gear disposed below the horizontal rotation operating rod, a shoulder spline gear shaft assembly meshing with the shoulder step gear, a shoulder wire wheel fixed to the shoulder spline gear shaft assembly, and a shoulder seat bearing for mounting the shoulder step gear and the shoulder spline gear shaft assembly. The shoulder step gear is mounted on a gear shaft fixed to the back of the horizontal rotation operating rod. A shoulder transmission wire is wound around the shoulder wire wheel, and the shoulder transmission wire is connected to a switching device via a guide.

[0009] The forearm training device includes a forearm support base and two forearm step gears mounted on the forearm support base and meshing with each other, wherein a rotating handle is mounted on the gear shaft of one forearm step gear, and a forearm wire wheel is mounted on the other forearm step gear; a forearm transmission wire is wound around the forearm wire wheel, and the forearm transmission wire is connected to the switching device via a guide member;

[0010] The resistance mechanism includes a counterweight support frame and a counterweight block placed on the counterweight support frame;

[0011] The switching device includes a switching bracket, a switching pin and a guide slider arranged in the switching bracket and capable of reciprocating movement in the switching bracket, one end of the guide slider is fixed with a counterweight steel wire, and the other end of the counterweight steel wire is connected to the counterweight block in the resistance mechanism; three channels parallel to the reciprocating motion direction of the guide slider are provided in the guide slider, and three through holes respectively connected to the three channels are provided on the switching bracket; a pull rod is respectively provided in the channel, and a switching socket is provided on the same side of the pull rod and the guide slider where the counterweight steel wire is provided, and the switching pin is inserted from the through hole on the switching bracket into the switching socket on the corresponding pull rod; the other side of the pull rod is respectively connected and fixed with the steel wire from each training device.

[0012] Furthermore, the foot pedal is composed of a front pedal, a rear pedal and a connecting rod connecting the front pedal and the rear pedal. It is further preferred that footrests are provided on both the left and right sides of the rear pedal to make the trainee's feet more stable.

[0013] Furthermore, the knee wire wheel and shoulder wire wheel are both wire wheels with a spline shaft in the center, and they are respectively matched with the spline gears in the knee spline gear shaft kit and the shoulder spline gear shaft kit, so that the knee wire wheel and the shoulder wire wheel can be respectively embedded in the spline gears in the knee spline gear shaft kit and the shoulder spline gear shaft kit and fixed.

[0014] Furthermore, the roller guide pair includes an annular track and a sliding module arranged on the annular track, and the sliding module realizes its movement on the annular track through rollers.

[0015] Furthermore, the horizontal rotation operating lever comprises a long operating lever, a limit pin, and a short operating lever that fits within the long operating lever. The short operating lever is provided with a handle at one end away from the long operating lever. Limiting holes are provided at corresponding positions on the long and short operating levers. The limit pin is inserted into the limiting holes to fix the length of the horizontal rotation operating lever. More preferably, two elbow stoppers are provided at the end of the long operating lever away from the short operating lever to secure the elbow.

[0016] Furthermore, the gear shaft of the forearm step gear on which the rotating handle is to be installed is selected as a hexagonal head shaft, and the mounting hole of the rotating handle is correspondingly opened as a plum blossom hole, so that the handle can be installed at multiple rotation angles after being taken out.

[0017] Furthermore, the guide member is a fixed pulley. The direction of the steel wire can be guided by one or more fixed pulleys.

[0018] Furthermore, the seat legs are preferably height-adjustable legs, thereby enabling the seat height to be adjusted.

[0019] Furthermore, the knee joint training device, shoulder joint training device, forearm training device, switching device and resistance mechanism are each in two sets, which are symmetrically arranged on the left and right sides of the seat.

[0020] Considering the integrity of the structure, it is preferred that the seat, knee joint training device, shoulder joint training device, forearm training device, switching device and resistance mechanism are all installed on one base, and the knee joint training device, shoulder joint training device, forearm training device, switching device and resistance mechanism can be further installed on the base through corresponding supporting mechanisms.

[0021] Compared with the prior art, the present invention is characterized in that:

[0022] 1. The training of the knee joint, shoulder joint and forearm rotator cuff muscles in the training apparatus of the present invention is functionally independent, but the overall structure of the apparatus is integrated, which can save space.

[0023] 2. The training device of the present invention can perform targeted resistance training on the rotator cuff muscles of the knee joint, shoulder joint, and forearm. The user can easily switch between the training of the rotator cuff muscles of the knee joint, shoulder joint, and forearm during the training process, and can even train at the same time without moving to other equipment for training, which is easier to use.

[0024] 3. The training device of the present invention is beneficial to body shaping for fitness people, rehabilitation training for people with sports injuries, and improvement of athletes' competitive sports ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of an embodiment of the knee-shoulder-forearm rotational muscle strength training device of the present invention.

[0026] Figure 2 for Figure 1 Schematic top view of the knee joint training device in the embodiment shown.

[0027] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the sliding module in the knee joint training device in the embodiment shown.

[0028] Figure 4 for Figure 1 Schematic diagram of the assembly structure of the sliding module in the knee joint training device in the embodiment shown.

[0029] Figure 5 for Figure 1 Schematic top view of the shoulder joint training device in the illustrated embodiment.

[0030] Figure 6 for Figure 1 The assembly structure diagram of the shoulder joint training device in the embodiment shown.

[0031] Figure 7 for Figure 1 A schematic structural diagram of a horizontally rotating operating rod in a shoulder joint training device in the illustrated embodiment.

[0032] Figure 8 for Figure 1 The assembly structure diagram of the forearm training device in the embodiment shown.

[0033] Figure 9 for Figure 1 Schematic diagram of the southeast axis side of the switching bracket in the switching device in the illustrated embodiment.

[0034] Figure 10 for Figure 1 Schematic diagram of the southwest axis side of the switching bracket in the switching device in the illustrated embodiment.

[0035] Figure 11 for Figure 1 Schematic diagram of the three-dimensional structure of the guide slider in the switching device in the embodiment shown.

[0036] Figure 12 for Figure 1 Schematic diagram of the three-dimensional structure of the pull rod in the switching device in the embodiment shown.

[0037] The numbers in the figure are:

[0038] 1. Guide rail support seat; 2. Curved guide rail; 3. Sliding module; 31. Roller; 32. Rectangular block; 33. Fixing screw; 34. Nut; 4. Knee seat bearing; 5. Knee drive wire; 6. Knee wire wheel; 7. Knee step gear; 8. Pedal; 81. Front pedal; 82. Rear pedal; 83. Pedal baffle; 9. Hollow support seat; 10. Small support seat; 11. Guide; 12. Shoulder drive wire; 13. Shoulder seat bearing; 14. Shoulder step gear; 15. Horizontal rotation operating lever; 151. Elbow baffle; 152. Limit latch; 153. Long operation Rod; 154 short operating rod; 155 grip; 16 shoulder support frame; 17 pulley support column; 18 forearm support seat; 19 bearing; 20 rotating handle; 21 hexagonal head shaft; 22 switching support seat; 23 switching device; 231 switching bracket; 232 switching pin; 233 channel; 234 through hole; 235 guide slider; 236 pull rod; 2361 switching socket; 24 counterweight support frame; 25 counterweight block; 26 seat; 27 base; 28 forearm transmission wire; 29 forearm step gear; 30 forearm wire wheel. DETAILED DESCRIPTION

[0039] In order to better explain the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0040] like Figure 1As shown, the knee-shoulder-forearm rotator cuff strength training apparatus of the present invention includes a base 27, a seat 26 mounted on the base 27 for the trainee to sit on for training, a knee training device, a shoulder training device, a forearm training device, a switching device 23, and a resistance mechanism. The knee, shoulder, and forearm training devices share a resistance mechanism via the switching device 23, enabling switching between three training modes. The knee, shoulder, and forearm training devices, the switching device 23, and the resistance mechanism each comprise two sets, symmetrically arranged on the left and right sides of the seat 26, centered about the longitudinal midline of the seat 26. The base 27 serves as the underlying support structure for all other devices, maintaining a large surface area in contact with the ground to provide stability.

[0041] like Figure 2 、 Figure 3 and Figure 4 As shown, the knee joint training device in the training apparatus of the present invention includes a knee support mechanism, a foot pedal 8, and a knee transmission mechanism that enables the foot pedal 8 to rotate left and right with the heel as the fulcrum. The knee transmission mechanism includes a roller guide pair arranged below the foot pedal 8, a knee step gear 7, a knee spline gear shaft kit that meshes with the knee step gear 7, a knee wire wheel 6 fixed on the knee step gear 7, and a knee seat bearing 4 for mounting the knee step gear 7 and the knee spline gear shaft kit. The knee step gear 7 is mounted on a gear shaft fixed to the back of the heel of the foot pedal 8. A knee transmission wire 5 is wound around the knee wire wheel 6. The knee transmission wire 5 is connected to the switching device 23 via a guide 11. The knee transmission wire 5 wheel can pull the knee transmission wire 5 when rotating. Specifically:

[0042] The support structure includes a guide rail support seat 1, a hollow support seat 9 and a small support seat 10, wherein the guide rail support seat 1 provides a support point for the arc-shaped guide rail 2, and the hollow support seat 9 and the small support seat 10 both provide support points for the guide member 11. A total of three guide members 11 are used in the knee joint training device, and the guide member 11 is specifically a fixed pulley. The support surface of the guide rail support seat 1 is designed to be arc-shaped, consistent with the curvature of the arc-shaped guide rail 2, providing support for the arc-shaped guide rail 2. Figure 1 In the illustrated embodiment, the hollow support base 9 has upper and lower support surfaces connected by four struts. The interior is hollow, and two of the three guide members 11 are located on each of the upper and lower support surfaces. Three fixed pulleys redirect the force transmission twice, ultimately converting the horizontal tension into a vertical force via the knee drive wire 5, which is looped over the fixed pulleys. This pulls the counterweight 25 in the resistance mechanism, creating the required resistance for training. The small support base 10 is mounted on the switching support base 22, which houses the switching bracket 231.

[0043] The footrest 8 provides support for the trainee's feet. It consists of a front pedal 81, a rear pedal 82, and a connecting rod connecting the front and rear pedals 81 and 82. The front pedal 81 is preferably arched, and more preferably, footrest blocks 83 are provided on the left and right sides of the rear pedal 82. This further facilitates the trainee's feet being inserted into the footrest 8 and stabilized. The footrest 8 is installed in a position where the trainee's feet rest comfortably while sitting on the seat 26.

[0044] The roller guide pair includes an annular track and a sliding module 3 arranged on the annular track, wherein the arc guide rail 2 is fixed on the guide rail support seat 1, and the sliding module 3 is fixed to the sole of the foot pedal 8. Figure 1 In the embodiment shown, the sliding module 3 is fixed to the front pedal 81 of the footrest 8 and slides on the circular track through the roller 31 provided thereon. The structure of the sliding module 3 is as follows: Figure 3 As shown, it consists of a rectangular block 32, a fixing screw 33, a nut 34, and a roller 31 mounted on the rectangular block 32. The nut 34 and fixing screw 33 are used to fix the four rollers 31 to the rectangular block 32, so that the four rollers 31 can be clamped and rolled on the arc guide rail 2. The two knee seat bearings 4 used to mount the knee step gear 7 and the knee spline gear shaft kit are both mounted on the base 27. They are both external spherical bearings that can withstand axial and radial forces and can bear the pressure from the feet. One of the knee seat bearings 4 is equipped with a gear shaft. This gear shaft passes through the knee step gear 7 and is fixedly connected to the back of the rear pedal 82 of the foot pedal 8, so that the foot pedal 8 and the knee step gear 7 form a linkage, allowing the foot pedal 8 to rotate freely left and right with the heel as the fulcrum. A knee spline gear shaft kit and a knee wire wheel 6 are installed in another knee seat bearing 4. The knee spline gear shaft kit includes a spline gear and a spline shaft. The center of the knee wire wheel 6 has a spline shaft. The spline gear in the knee spline gear shaft kit is meshed with the knee step gear 7 next to it. The center of the spline gear in the knee spline gear shaft kit is a spline structure, which matches the spline shaft in the center of the knee wire wheel 6 above it, so that the knee wire wheel 6 can be embedded in the spline gear and fixed.

[0045] The trainee inserts his feet into the foot pedals 8. When the foot pedals 8 rotate horizontally, with the help of the sliding module 3, a rotational movement with the heel as the fixed point can be achieved. While it rotates, the knee step gear 7 under the heel also rotates, and then drives the knee spline gear kit and the knee wire wheel 6 thereon to rotate, and then drives the switching device 23 through the knee transmission wire 5 of the knee wire wheel 6, and drives the counterweight block 25 in the resistance mechanism through the counterweight wire in the switching device 23 to operate, so as to realize the training of the knee joint rotation muscle group.

[0046] like Figures 5 to 7As shown, the shoulder joint training device in the training apparatus of the present invention includes a shoulder support mechanism, a horizontal rotation operating rod 15, and a shoulder transmission mechanism that causes the horizontal rotation operating rod 15 to rotate horizontally. The shoulder transmission mechanism includes a shoulder step gear 14 disposed below the horizontal rotation operating rod 15, a shoulder spline gear shaft set that meshes with the shoulder step gear 14, a shoulder wire wheel fixed to the shoulder spline gear shaft set, and a shoulder seat bearing 13 for mounting the shoulder step gear 14 and the shoulder spline gear shaft set. The shoulder step gear 14 is mounted on a gear shaft fixed to the back of the horizontal rotation operating rod 15. A shoulder transmission wire 12 is wound around the shoulder wire wheel. The shoulder transmission wire 12 is connected to the switching device 23 via a guide 11. The shoulder transmission wire 12 can pull the shoulder transmission wire 12 when the wheel rotates. Among them:

[0047] The shoulder support mechanism includes a shoulder support frame 16 and a pulley support column 17, both mounted on a base 27. The shoulder support frame 16 provides support for the shoulder transmission mechanism, while the pulley support column 17 provides support for the guide member 11. These structures can be cylindrical or square. The shoulder joint training device uses two guide members 11, each of which is a fixed pulley. One of the pulley support columns 17 is located on a switching support seat 22, which houses a switching bracket 231. The guide member 11 changes the direction of force transmitted by the shoulder transmission wire 12. The guide member 11 is aligned with the height of the shoulder transmission wire 12 on the shoulder wire pulley, changing the direction of force transmitted by the shoulder transmission wire 12 twice. This converts the vertical force of the counterweight 25 into horizontal resistance, allowing the counterweight 25 to be pulled upward during operation.

[0048] Two shoulder bearing blocks 13, used to mount the shoulder step gear 14 and the shoulder spline gear shaft assembly, are mounted on the shoulder support frame 16. A gear shaft is mounted in one of the shoulder bearing blocks 13. This shaft passes through the shoulder step gear 14 and is fixedly connected to the back of the horizontal rotation operating lever 15, allowing the horizontal rotation operating lever 15 to rotate horizontally in coordination with the shoulder bearing block 13 and the shoulder step gear 14 below it. The other shoulder bearing block 13 houses the shoulder spline gear shaft assembly and the shoulder wire wheel. The shoulder spline gear shaft assembly includes a spline gear and a spline shaft. The shoulder wire wheel has a spline shaft at its center. The spline gear in the shoulder spline gear shaft assembly is mounted at the same height as the shoulder step gear 14 adjacent to it and meshes with each other. The spline gear in the shoulder spline gear shaft assembly has a spline structure at its center, matching the spline shaft at the center of the shoulder wire wheel above it, allowing the shoulder wire wheel to be embedded in the spline gear and secured.

[0049] The horizontal rotation operating rod 15 can be designed to be adjustable in length. Figure 1In the illustrated embodiment, the horizontal rotation operating rod 15 includes a long operating rod 153, a limit pin 152, and a short operating rod 154 that is sleeved within the long operating rod 153. A handle 155 is provided on the end of the short operating rod 154 that is away from the long operating rod 153. Limiting holes are provided at corresponding positions on the long operating rod 153 and the short operating rod 154. The limit pin is inserted into the limiting holes to fix the length of the horizontal rotation operating rod 15, making it convenient for the trainee to adjust the length of the horizontal rotation operating rod 15 according to their arm length. Furthermore, two elbow baffles 151 can be provided on the end of the long operating rod 153 that is away from the short operating rod 154 to fix the elbows. When the horizontal rotation operating rod 15 rotates horizontally with the gear shaft on the shoulder step gear 14 as the axis, the shoulder step gear 14 rotates at the same angular velocity and drives the spline gear in the shoulder spline gear shaft kit meshing with the shoulder step gear 14 to rotate, and then drives the shoulder spline gear kit and the shoulder wire wheel thereon to rotate, and then drives the switching device 23 through the shoulder transmission wire 12 of the shoulder wire wheel, and drives the counterweight block 25 in the resistance mechanism through the counterweight steel wire in the switching device 23 to operate, so as to realize the training of the shoulder joint rotation muscle group.

[0050] The installation position of the horizontal rotation operating rod 15 is a place where the trainee can be placed naturally and comfortably when sitting on the seat 26. As far as the material is concerned, the horizontal rotation operating rod 15 is preferably made of hollow stainless steel.

[0051] like Figure 8As shown, the forearm training device in the training apparatus of the present invention includes a forearm support seat 18 and two forearm step gears 29 mounted on the forearm support seat 18 and meshing with each other. The forearm support seat 18 is a hollow cylinder, and the bottom is mounted on the base 27 by screws, providing support for multiple parts in the forearm training device. The two forearm step gears 29 are mounted on the middle and upper part of the forearm support seat 18. Specifically, four circular bosses are provided in the middle and upper part of the forearm support seat 18 to embed the bearings 19. A bearing hole is punched in the center of the circular boss. In order to enable the two forearm step gears 29 to mesh in the forearm support seat 18, the center distance of the four circular bosses at the top is designed to be a distance that can just mesh after the gears are placed. The top of this structure is evacuated to facilitate the installation of the forearm step gears 29. A rotating handle 20 is mounted on the gear shaft of one forearm step gear 29, preferably mounted on the forearm step gear 29 via a hexagonal shaft 21. A forearm wire pulley 30 is mounted on the gear shaft of the other forearm step gear 29. A forearm transmission wire 28 is wound around the forearm wire pulley 30, which is connected to the switching device 23 via a guide 11. When the forearm transmission wire pulley 30 rotates, it pulls the forearm transmission wire 28. The forearm training device uses two guides 11, specifically fixed pulleys. One is mounted on the forearm support base 18 (a hole is reserved on the side panel of the forearm support base 18 for the forearm transmission wire 28, and a portion of the front panel is cut out to accommodate the fixed pulley). The other is mounted on the switching support base 22, which houses the switching bracket 231.

[0052] The rotating handle 20 in the forearm training device can be a component that can be grasped by the hand, such as a crossbar. Preferably, the rotating handle 20 is composed of a grip body, connecting protrusions at both ends, and a crossbeam. The center of the crossbeam is punched with a plum blossom hole, which allows it to be rotated to multiple angles after removal and then inserted into the hexagonal head shaft 21. The hexagonal head shaft 21 is connected and fixed to the forearm step gear 29 behind it, so that the vertical rotation of the rotating handle 20 is synchronized with the rotation of the forearm step gear 29. When the rotating handle 20 rotates, the force generated by the rotation will be transmitted to the forearm wire wheel 30 through the action of the two forearm step gears 29, and then the forearm transmission wire 28 of the forearm wire wheel 30 will drive the switching device 23, and the counterweight steel wire in the switching device 23 will drive the counterweight block 25 in the resistance mechanism to operate, thereby achieving training of the forearm rotation muscle group.

[0053] The resistance mechanism includes a counterweight support frame 24 and a counterweight block 25 placed on the counterweight support frame 24; the counterweight block 25 can be switched to different weights as needed.

[0054] The core function of the switching device 23 in the training apparatus of the present invention is to combine the resistance sources of the knee joint training device, the shoulder joint training device and the forearm training device into one, that is, the three training devices share one resistance source, with the counterweight block 25 in the resistance mechanism serving as the resistance source. Figures 9 to 11 As shown, the switching device 23 in the training apparatus of the present invention includes a switching bracket 231 with a hollow structure, three switching pins 232, and a guide slider 235 arranged in the switching bracket 231 and capable of reciprocating movement in the switching bracket 231, wherein the switching bracket 231 is mounted on the base 27 through the switching support seat 22, and a counterweight steel wire is fixed to one end of the guide slider 235, and the other end of the counterweight steel wire passes through the counterweight support frame 24 and is connected to the counterweight block 25 thereon; three channels 233 parallel to the reciprocating direction of the guide slider 235 are opened in the guide slider 235, and three through holes 234 respectively connected to the three channels 233 are opened on the switching bracket 231; a pull rod 236 is respectively provided in the channel 233, and the structure of the pull rod 236 is as shown in FIG. Figure 12 As shown, the knee joint training device, shoulder joint training device, and forearm training device are connected to the resistance mechanism via three pull rods 236. Specifically, each pull rod 236 and the guide slider 235 have a switching socket 2361 on the same side as the counterweight wire. The switching latch 232 is inserted through the through hole 234 on the switching bracket 231 and enters the switching socket 2361 on the corresponding pull rod 236. The other side of each pull rod 236 is respectively connected and fixed to the knee transmission wire 5, shoulder transmission wire 12, and forearm transmission wire 28 from the knee joint training device, shoulder joint training device, and forearm training device. When the switching latch 232 is inserted through the through hole 234 on the switching bracket 231 and enters the switching socket 2361 on the corresponding pull rod 236, the knee joint training device, shoulder joint training device, or forearm training device is locked. Conversely, removing the switching latch 232 unlocks the corresponding training device.

[0055] The seat 26 in the training apparatus of the present invention can be an existing conventional height-adjustable or non-adjustable seat 26. When the seat 26 is a height-adjustable seat 26, the legs of the seat 26 can be designed as height-adjustable telescopic rod legs, thereby achieving adjustment of the seat 26 height.

Claims

1. A knee-shoulder-forearm rotation muscle group strength training device, comprising a seat (26), a knee joint training device, a shoulder joint training device and a forearm training device, characterized in that: The knee joint training device, the shoulder joint training device and the forearm training device share a resistance mechanism through a switching device (23), thereby realizing switching between three training modes; wherein: The knee joint training device comprises a knee supporting mechanism, a foot pedal (8), and a knee transmission mechanism that enables the foot pedal (8) to rotate left and right with the heel as a fulcrum. The knee transmission mechanism comprises a roller guide rail pair arranged below the foot pedal (8), a knee step gear (7), a knee spline gear shaft kit meshing with the knee step gear (7), a knee wire wheel (6) fixed on the knee spline gear shaft kit, and a knee seat bearing (4) for mounting the knee step gear (7) and the knee spline gear shaft kit. The knee step gear (7) is a gear shaft kit having a plurality of meshing members. ) is mounted on a gear shaft fixed to the back of the heel of the foot pedal (8); a knee transmission wire (5) is wound around the knee wire wheel (6), and the knee transmission wire (5) is connected to the switching device (23) via a guide (11); the foot pedal (8) is composed of a front pedal (81), a rear pedal (82) and a connecting rod connecting the front pedal (81) and the rear pedal (82); the roller guide pair includes an annular track and a sliding module (3) arranged on the annular track, and the sliding module (3) realizes its movement on the annular track through a roller (31); The shoulder joint training device comprises a shoulder support mechanism, a horizontal rotation operating rod (15), and a shoulder transmission mechanism for causing the horizontal rotation operating rod (15) to rotate horizontally. The shoulder transmission mechanism comprises a shoulder step gear (14) arranged below the horizontal rotation operating rod (15), a shoulder spline gear shaft kit meshing with the shoulder step gear (14), a shoulder wire wheel fixed to the shoulder spline gear shaft kit, and a shoulder seat bearing (13) for mounting the shoulder step gear (14) and the shoulder spline gear shaft kit. The shoulder step gear (14) is mounted on a gear shaft fixed to the back of the horizontal rotation operating rod (15); a shoulder transmission wire (12) is wound around the shoulder wire wheel, and the shoulder transmission wire (12) is connected to a switching device (23) via a guide (11); The forearm training device comprises a forearm support seat (18) and two forearm step gears (29) mounted on the forearm support seat (18) and meshing with each other, wherein a rotating handle (20) is mounted on the gear shaft of one forearm step gear (29), and a forearm wire wheel (30) is mounted on the other forearm step gear (29); a forearm transmission wire (28) is wound around the forearm wire wheel (30), and the forearm transmission wire (28) is connected to the switching device (23) via a guide member (11); The resistance mechanism comprises a counterweight support frame (24) and a counterweight block (25) placed on the counterweight support frame (24); The switching device (23) includes a switching bracket (231), a switching latch (232), and a guide slider (235) arranged in the switching bracket (231) and capable of reciprocating in the switching bracket (231), wherein a counterweight steel wire is fixed to one end of the guide slider (235), and the other end of the counterweight steel wire is connected to the counterweight block (25) in the resistance mechanism; three channels (233) are provided in the guide slider (235) and are parallel to the reciprocating direction of the guide slider (235); and three channels (233) are provided on the switching bracket (231) to respectively Three through holes (234) are connected to the three channels (233); a pull rod (236) is respectively provided in the channel (233), and a switching socket (2361) is provided on the same side of the pull rod (236) and the guide slider (235) where the counterweight wire is provided, and the switching pin (232) is inserted from the through hole (234) on the switching bracket (231) into the switching socket (2361) on the corresponding pull rod (236); the other side of the pull rod (236) is respectively connected and fixed with the steel wire from each training device.

2. The knee-shoulder-forearm rotator cuff strength training apparatus according to claim 1, characterized in that: The left and right sides of the rear pedal (82) are both provided with footrest baffles (83).

3. The knee-shoulder-forearm rotator cuff strength training apparatus according to claim 1, wherein: The horizontal rotation operating rod (15) comprises a long operating rod (153), a limit pin (152), and a short operating rod (154) sleeved in the long operating rod (153); a grip (155) is provided on one end of the short operating rod (154) away from the long operating rod (153); limit holes are provided at corresponding positions of the long operating rod (153) and the short operating rod (154); and the limit pin is inserted into the limit hole to fix the length of the horizontal rotation operating rod (15).

4. The knee-shoulder-forearm rotator cuff strength training apparatus according to claim 3, wherein: Two elbow baffles (151) are provided at one end of the long operating rod (153) away from the short operating rod (154).

5. The knee-shoulder-forearm rotator cuff strength training apparatus according to claim 1, wherein: The rotating handle (20) is mounted on the forearm step gear (29) via a hexagonal shaft (21).

6. The knee-shoulder-forearm rotator cuff strength training apparatus according to claim 1, wherein: The guide member (11) is a fixed pulley.

7. The knee-shoulder-forearm rotator cuff strength training apparatus according to any one of claims 1 to 6, characterized in that: The support legs of the seat (26) are height-adjustable support legs.

8. The knee-shoulder-forearm rotator cuff strength training apparatus according to any one of claims 1 to 6, characterized in that: The knee joint training device, shoulder joint training device, forearm training device, switching device (23) and resistance mechanism are each provided in two sets, which are symmetrically arranged on the left and right sides of the seat (26).

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