Hip joint trainer

By designing a hip joint trainer that includes a base plate, sliding components, cylinders, connecting shafts, and contact cylinders, and adopting a standing training method, the problem of poor results in traditional seated training is solved, achieving high-intensity and highly adaptable hip joint training effects.

CN223668580UActive Publication Date: 2025-12-16HAINAN XUANDONG WARRIOR SPORTS CO LTD
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Patent Information

Application Number
CN202520250731.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-17
Publication Date
2025-12-16
Estimated Expiration
2035-02-17

AI Technical Summary

Technical Problem

Traditional hip joint training devices are all seated, resulting in poor training effects.

Method used

Design a hip joint trainer that includes a base plate, sliding components, a cylinder, a connecting shaft, a contact cylinder, and a grip bar. The trainer uses a standing training method, where the hip joint is repeatedly resisted by the cylinder through leg swing. The adjustable contact cylinder and soft padding are used to accommodate different heights and reduce friction.

Benefits of technology

It enables high-intensity, effective hip joint training, is suitable for users of different heights, and reduces the risk of friction injury.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a hip joint trainer which comprises a bottom plate, two sets of sliding assemblies, two air cylinders, a connecting shaft, a contact cylinder and two holding rods, and the bottom plate is provided with a first side face and a second side face which are oppositely arranged in the first direction; the two sliding assemblies are arranged on the first side face and are opposite in the second direction, and the sliding assemblies have the freedom degree of sliding in the first direction. The two air cylinders are fixed to the two sliding assemblies in a one-to-one correspondence mode, and the extending direction of the air cylinders is perpendicular to the second direction; the connecting shaft is fixed between piston rods of the two cylinders, and the axial direction is the same as the second direction; the contact cylinder sleeves the periphery of the connecting shaft; the two holding rods are fixed to the first side face and are opposite in the second direction, and the two holding rods are both located between the two air cylinders. According to the device, the crotch joint of a user repeatedly resists the resistance of the air cylinder, so that the crotch joint is trained, the whole-course standing type training is achieved, the training intensity is high, and the training effect is good.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of training devices, in particular to a hip joint training device. BACKGROUND

[0002] The hip joint, also known as the hip joint, is composed of the femoral head and the acetabulum, and belongs to the cam joint. The inner proximal crescent surface of the acetabulum is covered with articular cartilage, and the acetabular fossa is filled with fat, which can be squeezed out or absorbed into the joint to maintain the balance of intra-articular pressure. There is a labrum attached to the edge of the acetabulum, which deepens the depth of the joint. There is a transverse acetabular ligament on the acetabular notch, which forms a hole with the notch and passes through nerves, blood vessels, etc.

[0003] The hip joint mainly plays a supporting role in sports, but its flexibility also has an important influence on various sports, so the training of the hip joint is also very important. However, the traditional hip joint training device is a sitting training device, and the training effect is poor. CONTENT OF THE INVENTION

[0004] The main purpose of the present application is to provide a hip joint training device, which aims to solve the problem that the traditional hip joint training device is a sitting training device and the training effect is poor.

[0005] To achieve the above-mentioned purpose, the present application provides a hip joint training device, which comprises a bottom plate, two groups of sliding assemblies, two cylinders, a connecting shaft, a contact cylinder and two handle bars, the bottom plate has a first side and a second side arranged opposite in a first direction, the first direction is the same as the thickness direction of the bottom plate; two groups of sliding assemblies are arranged opposite in a second direction on the side of the first side away from the second side, the sliding assembly has a degree of freedom along the first direction, the second direction is parallel to the bottom plate; two cylinders are fixed corresponding to two groups of sliding assemblies and are arranged opposite in the second direction, the extension direction of the cylinder is perpendicular to the second direction, the cylinder has a degree of freedom along the extension direction; the connecting shaft is fixed between the piston rods of the two cylinders and has the same axial direction as the second direction; the contact cylinder is sleeved on the outer circumference of the connecting shaft; two handle bars are fixed on the side of the first side away from the second side and are arranged opposite in the second direction, wherein the two handle bars are located between the two cylinders.

[0006] Optionally, the hip joint training device further comprises two support rods and a cross bar, the two support rods are arranged opposite between the two cylinders in the second direction and have the same extension direction as the first direction; the cross bar is fixed to one end of the two support rods away from the bottom plate, wherein the two handle bars are fixed to the side of the cross bar away from the bottom plate.

[0007] Optionally, the support rod is a telescopic rod and has a telescopic freedom in the first direction.

[0008] Optionally, the sliding assembly comprises two support columns, two first sliding rails, two first sliding blocks, a connecting rod and a locking assembly, the two support columns are oppositely arranged in a third direction and fixed to the bottom plate, the third direction is perpendicular to the first direction and the second direction; the two first sliding rails correspond to the two support columns respectively and are fixed to the side of the corresponding support column facing the other support column, the first sliding rail extends in the first direction; the two first sliding blocks correspond to the two first sliding rails respectively and are in sliding fit; the connecting rod is fixed between the two first sliding blocks, wherein the cylinder is fixed to the side of the connecting rod away from the bottom plate, the extension direction of the connecting rod is the same as the extension direction of the cylinder; the locking assembly is fixed to the side of the connecting rod facing the support rod, and the locking assembly cooperates with the support rod to lock the sliding freedom of the connecting rod.

[0009] Optionally, the hip joint trainer further comprises two second sliding rails and two second sliding blocks, the two second sliding rails correspond to the two connecting rods respectively and are fixed to the side of the connecting rod away from the bottom plate, the extension direction of the second sliding rail is the same as the extension direction of the cylinder; the two second sliding blocks correspond to the two second sliding rails respectively and are in sliding fit, wherein the piston rod of the cylinder is fixed to the second sliding block, and the connecting shaft is fixed between the two second sliding blocks.

[0010] Optionally, the side of the two support rods away from each other is provided with a plurality of grooves arranged at intervals in the first direction; the locking assembly comprises a fixed sheet and a screw, the fixed sheet is fixed to the connecting rod; the screw penetrates through the fixed sheet and is threadedly connected with the fixed sheet, wherein the screw cooperates with the groove to lock the sliding freedom of the connecting rod.

[0011] Optionally, the included angle between the extension direction of the cylinder and the bottom plate is a, and 10°<a<20°; wherein the minimum distance between the end of the cylinder close to the connecting shaft and the bottom plate is b, and the minimum distance between the end of the cylinder away from the connecting shaft and the bottom plate is c, and b<c.

[0012] Optionally, the included angle a between the extension direction of the cylinder and the bottom plate is 15°.

[0013] Optionally, the contact cylinder is rotationally connected with the connecting shaft and has a rotational freedom around the axis of the connecting shaft.

[0014] Optionally, the outer periphery of the contact cylinder is provided with a soft pad.

[0015] The hip joint trainer provided in the embodiment of the application is in the elongated state of the air cylinder, at this time, the contact cylinder is in the initial position, in the third direction, the user first locates at the side of the contact cylinder away from the handle and faces the contact cylinder, then the user holds the handle with both hands, the hip joint is in contact with the contact cylinder, one leg is stepped on the bottom plate, and the other leg swings in the plane formed by the third direction and the first direction; in the process of leg swinging, when the leg swings in front of the user, the hip joint is driven to move in front of the user, so as to squeeze the contact cylinder and further drive the air cylinder to retract, when the leg swings behind the user, the hip joint is driven to move away from the contact cylinder, the air cylinder drives the connecting shaft to drive the contact cylinder to return to the initial position; in this way, in the process of reciprocating swinging of the leg, the hip joint of the user repeatedly resists the resistance of the air cylinder, so that the hip joint is trained, and the training is in a standing mode, the training intensity is high and the effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the embodiment of the application;

[0017] Figure 2 It is Figure 1 It is another view structure schematic view of the embodiment of the application;

[0018] Figure 3 It is a front view structure schematic view of the embodiment of the application.

[0019] In the figure: 1, bottom plate; 2, sliding assembly; 21, support column; 22, first sliding rail; 23, first sliding block; 24, connecting rod; 25, locking assembly; 251, fixed sheet; 252, screw; 3, air cylinder; 4, connecting shaft; 5, contact cylinder; 6, handle; 71, second sliding rail; 72, second sliding block; 81, support rod; 811, groove; 82, cross rod.

[0020] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0022] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications will also change accordingly.

[0023] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In addition, if the description of "first", "second", etc. is involved in the embodiments of the present application, the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that ordinary skilled persons in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0025] Reference Figures 1-3 The hip joint trainer provided by the embodiments of the present application can include a bottom plate 1, two groups of sliding assemblies 2, two air cylinders 3, a connecting shaft 4, a contact cylinder 5, and two grip rods 6. The bottom plate 1 has a first side and a second side oppositely arranged in a first direction, and the first direction is the same as the thickness direction of the bottom plate 1. The two groups of sliding assemblies 2 are arranged on the side of the first side away from the second side and are opposite in a second direction. The sliding assembly 2 has a degree of freedom of sliding along the first direction, and the second direction is parallel to the bottom plate 1. The two air cylinders 3 are fixed one by one with the two groups of sliding assemblies 2 and are opposite in the second direction. The extension direction of the air cylinder 3 is perpendicular to the second direction, and the air cylinder 3 has a degree of freedom of expansion along the extension direction thereof. The connecting shaft 4 is fixed between the piston rods of the two air cylinders 3 and has the same axial direction as the second direction. The contact cylinder 5 is sleeved on the outer periphery of the connecting shaft 4. The two grip rods 6 are fixed on the side of the first side away from the second side and are opposite in the second direction. Among them, the two grip rods 6 are located between the two air cylinders 3.

[0026] This application provides a hip joint trainer in which the cylinder 3 is in an extended state, and the contact cylinder 5 is in its initial position in the third direction. The user first stands on the side of the contact cylinder 5 away from the handle 6 and faces the contact cylinder 5. Then, the user holds the handle 6 with both hands, with the hip joint in contact with the contact cylinder 5. One leg is placed on the base plate 1, and the other leg swings in the plane enclosed by the third direction and the first direction. During the leg swing, when the leg swings towards the user, it will cause the hip joint to move towards the user, thereby squeezing the contact cylinder 5 and further pushing the cylinder 3 to retract. When the leg swings behind the user, it will cause the hip joint to move away from the contact cylinder 5, and the cylinder 3 will push the connecting shaft 4 to bring the contact cylinder 5 back to its initial position. In this way, during the reciprocating leg swing, the user's hip joint repeatedly resists the resistance of the cylinder 3, thereby training the hip joint. The entire training is done standing up, with high training intensity and good effect.

[0027] Among them, such as Figure 1 As shown, the first direction is the X direction, which is the thickness direction of the base plate 1, the second direction is the Y direction, and the third direction is the Z direction. The first direction, the second direction, and the third direction are perpendicular to each other, and the second direction and the third direction are parallel to the first side of the base plate 1. When the trainer is used, the first direction can be the same as the direction of gravity.

[0028] Furthermore, the contact cylinder 5 is rotatably connected to the connecting shaft 4 and has the freedom to rotate axially around the connecting shaft 4. Thus, the contact cylinder 5 can rotate axially around the connecting shaft 4. When the user's hip joint comes into contact with the contact cylinder 5, the friction between the contact cylinder 5 and the hip joint becomes rolling friction during the leg swing, effectively reducing the friction between the contact cylinder 5 and the user and preventing damage to the user's skin or clothing.

[0029] In addition, a soft pad is provided around the outer periphery of the contact cylinder 5. This pad can effectively reduce the impact force when the user's hip joint comes into contact with the contact cylinder 5 during the user's leg swinging process, and prevent the user's hip joint from being injured.

[0030] It should be noted that the cylinder 3 is connected to the sliding component 2, and the sliding component 2 can slide along the first direction. In this way, the cylinder 3 can change its position in the first direction through the sliding component 2, thereby changing the position of the connecting shaft 4 and the contact cylinder 5 in the first direction. In other words, the height of the contact cylinder 5 can be adjusted to suit people of different heights.

[0031] refer to Figure 2In the example embodiment, the hip joint trainer can further include two support rods 81 and a cross rod 82, the two support rods 81 are oppositely arranged between the two air cylinders 3 in the second direction and have the same extending direction as the first direction, and the cross rod 82 is fixed to one end of the two support rods 81 away from the bottom plate 1, wherein the two handle bars 6 are fixed to one side of the cross rod 82 away from the bottom plate 1.

[0032] Wherein the support rod 81 is fixed to the bottom plate 1, the cross rod 82 is fixed to the support rod 81, the two handle bars 6 are fixed to the cross rod 82, and the distance between the side of the cross rod 82 away from the bottom plate 1 and the first side is greater than the maximum distance between the contact cylinder 5 and the first side, so that the handle bar 6 is above the contact cylinder 5 in the first direction, facilitating the user to grasp.

[0033] Further, the support rod 81 is a telescopic rod and has a freedom degree of telescoping in the first direction, so that the height of the cross rod 82 and the handle bar 6 can be adjusted by adjusting the telescoping length of the two support rods 81, to adapt to different heights of the user to grasp.

[0034] It should be understood that the telescopic rod here needs to have a self-locking structure to fix the length of the telescopic rod, and there are many telescopic rods with self-locking structures in the prior art, which will not be described in detail here.

[0035] Reference Figure 1 In the example embodiment, the sliding assembly 2 can include two support columns 21, two first sliding rails 22, two first sliding blocks 23, a connecting rod 24, and a locking assembly 25, the two support columns 21 are oppositely arranged in the third direction and are fixed to the bottom plate 1, the third direction is perpendicular to the first direction and the second direction; the two first sliding rails 22 are correspondingly arranged on one side of the corresponding support column 21 facing the other support column 21 and are fixed to the corresponding support column 21, and the first sliding rail 22 extends in the first direction; the two first sliding blocks 23 are correspondingly and slidably connected to the two first sliding rails 22; the connecting rod 24 is fixed between the two first sliding blocks 23, wherein the air cylinder 3 is fixed to one side of the connecting rod 24 away from the bottom plate 1, and the extending direction of the connecting rod 24 is the same as that of the air cylinder 3; the locking assembly 25 is fixed to one side of the connecting rod 24 facing the support rod 81, and the locking assembly 25 cooperates with the support rod 81 to lock the sliding freedom degree of the connecting rod 24.

[0036] Wherein the first sliding block 23 is slidably connected to the first sliding rail 22, and the connecting rod 24 is connected between the two first sliding blocks 23, so that the connecting rod 24 can slide in the first direction, the air cylinder 3 is fixed to the connecting rod 24, so that the air cylinder 3 can slide in the first direction, and the air cylinder 3 further drives the connecting shaft 4 and the contact cylinder 5 to move synchronously, thereby changing the height of the contact cylinder 5 to adapt to different heights of the user.

[0037] Further, the locking assembly 25 cooperates with the support rod 81 to lock the sliding freedom of the connecting rod 24, so that when the height of the connecting rod 24 is adjusted, the sliding freedom of the connecting rod 24 is locked by the locking assembly 25, preventing the connecting rod 24 from sliding in the first direction during use of the hip joint trainer.

[0038] With reference to Figure 1 In the example embodiment, the hip joint trainer can further include two second sliding rails 71 and two second sliding blocks 72, the two second sliding rails 71 correspond to the two connecting rods 24 one by one and are fixed to the side of the connecting rod 24 away from the bottom plate 1, and the extension direction of the second sliding rail 71 is the same as the extension direction of the air cylinder 3; the two second sliding blocks 72 correspond to the two second sliding rails 71 one by one and are in sliding cooperation, wherein the piston rod of the air cylinder 3 is fixed to the second sliding block 72, and the connecting shaft 4 is fixed between the two second sliding blocks 72.

[0039] Specifically, the piston rod of the air cylinder 3 is fixed to the second sliding block 72, so that under the condition that the user repeatedly pushes the contact cylinder 5, the contact cylinder 5 can only move in the extension direction of the second sliding rail 71 due to the cooperation between the second sliding block 72 and the second sliding rail 71, and the force direction of the piston rod of the air cylinder 3 is also the same as the extension direction of the air cylinder 3, so that when the contact cylinder 5 is further pushed to retract the piston rod of the air cylinder 3 through the connecting shaft 4 and the second sliding block 72, the force direction of the piston rod of the air cylinder 3 is the same as the extension direction of the air cylinder 3, effectively preventing the air cylinder 3 from being damaged.

[0040] With reference to Figure 2 And Figure 3 In the example embodiment, the side of each of the two support rods 81 away from each other is provided with a plurality of grooves 811 arranged in the first direction; the locking assembly 25 can include a fixed sheet 251 and a screw 252, the fixed sheet 251 is fixed to the connecting rod 24; the screw 252 penetrates the fixed sheet 251 and is threadedly connected with the fixed sheet 251, wherein the screw 252 cooperates with the groove 811 to lock the sliding freedom of the connecting rod 24.

[0041] Specifically, by screwing the screw 252 to insert the screw 252 into the groove 811 on the support rod 81, the relative position of the support rod 81 and the screw 252 in the first direction can be locked, so that the relative position of the support rod 81, the fixed sheet 251 and the connecting rod 24 is locked, and the connecting rod 24 cannot slide in the first direction; when it is necessary to adjust the position of the connecting rod 24, the screw 252 can be unscrewed to move out of the groove 811 on the support rod 81, so that the relative position of the support rod 81 and the screw 252 is no longer fixed, and the connecting rod 24 can slide in the first direction.

[0042] With reference to Figure 2In the example embodiment, the angle between the extending direction of the air cylinder 3 and the bottom plate 1 is a, and 10° < a < 20°; wherein the minimum distance between the end of the air cylinder 3 close to the connecting shaft 4 and the bottom plate 1 is b, and the minimum distance between the end of the air cylinder 3 far from the connecting shaft 4 and the bottom plate 1 is c, and b < c.

[0043] Specifically, the piston rod of the air cylinder 3 is closer to the bottom plate 1 than the cylinder body, and the contact cylinder 5 moves in the extending direction of the air cylinder 3, so that the height of the contact cylinder 5 will be slightly higher when the contact cylinder 5 is pushed to move by the hip joint of the user, which is consistent with the fact that the height of the hip joint will also be higher to a certain extent when the leg of the user swings forward, so that the contact cylinder 5 can be stably contacted with the hip joint, and the training effect is better.

[0044] Further, a can be 12°, 15°, 17°, 19°, etc., and in the preferred embodiment, the angle a between the extending direction of the air cylinder 3 and the bottom plate 1 is 15°.

[0045] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A hip joint trainer, characterized in that, The hip joint trainer comprises: a bottom plate (1) having a first side and a second side oppositely arranged in a first direction, the first direction being the same as the thickness direction of the bottom plate (1); two groups of sliding assemblies (2) arranged on the side of the first side away from the second side and oppositely arranged in a second direction, the sliding assemblies (2) having a sliding freedom in the first direction, the second direction being parallel to the bottom plate (1); two cylinders (3) fixedly corresponding to the two groups of sliding assemblies (2) and oppositely arranged in the second direction, the extension direction of the cylinders (3) being perpendicular to the second direction, the cylinders (3) having a telescopic freedom in the extension direction thereof; a connecting shaft (4) fixed between the piston rods of the two cylinders (3) and axially the same as the second direction; a contact cylinder (5) sleeved on the outer periphery of the connecting shaft (4); two handlebars (6) fixed on the side of the first side away from the second side and oppositely arranged in the second direction, wherein the two handlebars (6) are located between the two cylinders (3).

2. The hip joint exerciser as set forth in claim 1, wherein The hip joint trainer further comprises: two support rods (81) oppositely arranged between the two cylinders (3) in the second direction and having the same extension direction as the first direction; a crossbar (82) fixed to the ends of the two support rods (81) away from the bottom plate (1), wherein the two handlebars (6) are fixed to the side of the crossbar (82) away from the bottom plate (1).

3. The hip joint trainer of claim 2, wherein: The support rods (81) are telescopic rods and have a telescopic freedom in the first direction.

4. The hip joint exerciser of claim 2 wherein: The sliding assembly (2) comprises: two support columns (21) oppositely arranged in a third direction and fixed to the bottom plate (1), the third direction being perpendicular to the first direction and the second direction; two first sliding rails (22) corresponding to the two support columns (21) and fixed to the side of the corresponding support column (21) facing the other support column (21), the first sliding rails (22) extending in the first direction; two first sliding blocks (23) slidingly matched with the two first sliding rails (22); a connecting rod (24) fixed between the two first sliding blocks (23), wherein the cylinder (3) is fixed to the side of the connecting rod (24) away from the bottom plate (1), and the extension direction of the connecting rod (24) is the same as the extension direction of the cylinder (3); a locking assembly (25) fixed to the side of the connecting rod (24) facing the support rod (81), the locking assembly (25) cooperating with the support rod (81) to lock the sliding freedom of the connecting rod (24).

5. The hip joint exerciser of claim 4 wherein: The hip joint trainer further comprises: two second sliding rails (71) corresponding to the two connecting rods (24) and fixed to the side of the connecting rod (24) away from the bottom plate (1), the extension direction of the second sliding rails (71) being the same as the extension direction of the cylinder (3); Two second sliders (72) are slidably connected with two second slide rails (71) respectively, wherein a piston rod of the cylinder (3) is fixed with the second sliders (72), and the connecting shaft (4) is fixed between the two second sliders (72).

6. The hip joint exerciser of claim 4 wherein, The two support rods (81) are provided with a plurality of grooves (811) arranged at intervals in the first direction on the side away from each other; the locking assembly (25) comprises: A fixing plate (251) fixed with the connecting rod (24); A screw (252) penetrating through and threadedly connected with the fixing plate (251), wherein the screw (252) is matched with the groove (811) to lock the sliding degree of freedom of the connecting rod (24).

7. The hip joint exerciser of claim 1 wherein, The angle between the extension direction of the cylinder (3) and the bottom plate (1) is a, and 10° < a < 20°; Wherein the minimum distance between the end of the cylinder (3) close to the connecting shaft (4) and the bottom plate (1) is b, and the minimum distance between the end of the cylinder (3) away from the connecting shaft (4) and the bottom plate (1) is c, and b < c.

8. The hip joint exerciser of claim 7, wherein The angle a between the extension direction of the cylinder (3) and the bottom plate (1) is 15°.

9. The hip joint exerciser of claim 1 wherein, The contact cylinder (5) is rotationally connected with the connecting shaft (4) and has the degree of freedom of axial rotation around the connecting shaft (4).

10. The hip joint exerciser of claim 1 wherein, The outer periphery of the contact cylinder (5) is provided with a soft pad.