Binding structure and ankle training device

Abstract

The utility model discloses a binding structure and ankle training device.The binding structure comprises a binding band, one end of the binding band is a fixed connecting end, the other end of the binding band is provided with a magnetic attraction assembly, the magnetic attraction assembly comprises a first magnetic attraction buckle and a second magnetic attraction buckle connected with the first magnetic attraction buckle in a magnetic attraction mode, and the second magnetic attraction buckle is connected with the first magnetic attraction buckle in a magnetic attraction mode. The magnetic attraction assembly further comprises a limiting piece used for limiting the first magnetic attraction buckle and the second magnetic attraction buckle. The ankle training device comprises a foot supporting piece, an ankle supporting piece and a shank supporting piece which are sequentially connected, the included angle alpha between the foot supporting piece and the ankle supporting piece is an acute angle, and the ankle supporting piece is rotationally connected with the shank supporting piece. An elastic damping structure used for making contact with the shank supporting piece in the wearing state is arranged on the rear side of the shank supporting piece. The ankle training device further comprises a binding structure used for foot positioning. According to the binding structure, the binding efficiency can be improved, and meanwhile the connection stability of the binding structure can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of binding, in particular to a binding structure and a foot and ankle training device. Background Art

[0002] Exoskeleton robot technology is a comprehensive technology that integrates sensing, control, information, fusion, and mobile computing to provide a wearable mechanical mechanism for people as operators. This article briefly introduces the development status and trends of exoskeleton world robot technology in the military field. It refers to a robot that is worn outside the human body, also known as a "wearable robot". In recent years. With the rapid development of exoskeleton technology, more and more exoskeletons have been invented for auxiliary support and rehabilitation treatment of patients, and wearable exoskeletons for lower limb movement disorders are constantly emerging.

[0003] Existing lower limb exoskeleton robots, such as the patent number: CN202311091435.7, are a kind of active and passive combined lower limb exoskeleton robot mechanism. In order to fix the human body, the binding mechanism generally has deformation, and the human body can be well fixed during the Velcro pulling process. In this binding structure fixed by Velcro, one end of the Velcro needs to be completely removed before wearing to facilitate human wearing. After the human body is put on, one end of the Velcro needs to be passed through the bar hole, and then the Velcro is pulled to make the binding mechanism deform to fix the human body, and then the Velcro bristles are glued to the middle round hair of the Velcro to complete the binding. However, this Velcro binding method is relatively complicated, and each binding place needs to be done in turn, which is inefficient, and long-term use of Velcro will cause inadequate binding. Utility Model Content

[0004] The purpose of the utility model is to provide a binding structure and an ankle training device, which solves the problem that the existing binding mechanism mainly relies on Velcro for binding, the binding is complicated, the efficiency is low and the service life is not long.

[0005] The utility model is implemented as follows: a binding structure includes a binding belt, one end of the binding belt is a fixed connection end, and the other end of the binding belt is provided with a magnetic attraction component, the magnetic attraction component includes a first magnetic buckle and a second magnetic buckle magnetically connected to the first magnetic buckle, and the magnetic attraction component also includes a limiting member for limiting the first magnetic buckle and the second magnetic buckle.

[0006] When the binding structure in the utility model is in use, the fixed connection end of the binding belt is used to fix one end of the binding structure to the equipment, and the other end of the binding belt is magnetically connected through the first magnetic buckle and the second magnetic buckle. Specifically, the first magnetic buckle is stretched in the direction of the second magnetic buckle. When the first magnetic buckle is stretched to a certain distance range from the second magnetic buckle, the first magnetic buckle will be magnetically connected to the second magnetic buckle by itself under the action of magnetic attraction, and at the same time, the first magnetic buckle and the second magnetic buckle can be limited by the limiting piece; the binding structure does not require the user to align, only needs to pull the first magnetic buckle to the range of magnetic connection with the second magnetic buckle, and the magnetic component can be accurately aligned by itself, and the binding efficiency is high. Moreover, the limiting piece also completes the limiting simultaneously when the binding is completed. Therefore, the utility model can not only improve the binding efficiency but also ensure the connection stability of the binding structure.

[0007] A further technical solution of the utility model is: the first magnetic buckle is movably connected to the binding belt through a hollow connecting piece, a limiting groove is provided on the first magnetic buckle, the limiting piece is placed on the second magnetic buckle and passes through the hollow part to cooperate with the limiting groove.

[0008] The binding belt with the first magnetic buckle is stretched toward the second magnetic buckle. When the first magnetic buckle approaches the second magnetic buckle, the hollow part also approaches the limiter. When the first magnetic buckle and the second magnetic buckle are magnetically connected, the limiter is also inserted into the limiter groove along the hollow part, that is, the first magnetic buckle and the second magnetic buckle are magnetically connected and the limiter is completed at the same time. Since the limiter passes through the hollow part and cooperates with the limiter groove, and the hollow part is between the first magnetic buckle and the binding belt, when the binding belt is subjected to tension, the first magnetic buckle and the second magnetic buckle will not be separated due to the influence of the tension under the blocking of the limiter, thus ensuring stability during use.

[0009] A further technical solution of the utility model is: the limiting groove is communicated with the hollow part, the limiting groove has a structure protruding outward, and the limiting member cooperates with the limiting groove.

[0010] When the magnetic component completes the magnetic connection, the limit piece and the limit slot are matched at the same time, so the magnetic connection and the limit are completed at the same time; specifically, the limit slot is a structure that protrudes outward, and the limit piece is provided with a groove that cooperates with the protrusion. During the magnetic attraction process, the protrusion in the limit slot is inserted into the groove on the limit piece to complete the limit.

[0011] A further technical solution of the utility model is that a magnetic block is provided on one side of the first magnetic buckle and the second magnetic buckle that are opposite to each other.

[0012] The magnetic block is used for magnetic connection between the first magnetic buckle and the second magnetic buckle.

[0013] A further technical solution of the present utility model is that a connecting groove for connecting to a handle is provided at one end of the first magnetic buckle away from the limiting member.

[0014] A handle can be installed in the connection groove, so that the user can use the handle to pull the binding belt to magnetically connect the first magnetic buckle and the second magnetic buckle.

[0015] A further technical solution of the utility model is: a connecting rope is arranged inside the binding belt, and a rotating button for adjusting the length of the connecting rope is arranged at the fixed connection end of the binding belt.

[0016] By turning the rotary button, the connecting rope in the binding belt can be shortened and the tightness range of the binding belt can be reduced; when the tightness range of the binding belt needs to be increased, the rotary button is pulled outward to make the connecting rope free, and then the binding belt is pulled to lengthen the connecting rope and the tightness range of the binding belt can be adjusted.

[0017] The utility model also provides a foot and ankle training device, comprising a foot support, an ankle support, and a calf support connected in sequence, the angle α between the foot support and the ankle support is an acute angle, the ankle support is rotatably connected to the calf support, the rear side of the calf support is provided with an elastic damping structure for contacting the calf support in a worn state, and the foot and ankle training device also includes the binding structure for foot positioning.

[0018] The angle between the foot support and the ankle support is an acute angle, and the elastic damping structure is on the rear side of the calf support. When worn, the front end of the foot support can be naturally lifted upward, and the elastic damping structure is in contact with the calf support at this time; after being worn, when the human body walks forward, the toes are downward, and the ankle support and the calf support rotate at this time, and the elastic damping structure is further compressed, and the elastic damping structure accumulates force; when the human body's foot is lifted during walking, the compressed elastic damping structure gives thrust to the calf support, and the toes of the human body are lifted, which not only solves the problem of foot drop without the need for motor drive, but also has high comfort and good experience; at the same time, considering the problem of convenient transportation, the calf support and the ankle support can be rotated, and the calf support and the elastic damping structure are in contact but not connected, so when stored, the calf support can be directly rotated to store the foot support inside the calf support, which takes up little space and is convenient for storage and transportation.

[0019] When binding the ankle, the ankle is bound through the binding structure. There is no need to pull the binding belt while watching the position to be connected. The utility model only needs to pull the binding belt into the magnetic suction range of the magnetic suction component, and the magnetic suction can be completed under the action of the magnetic suction, and the limiting is completed at the same time, which is convenient and quick, and greatly improves the efficiency of binding.

[0020] A further technical solution of the utility model is: the fixed connection end of the binding strap is fixedly connected to the connection on one side of the foot support and the ankle support, the other end of the binding strap is connected to the first magnetic buckle, the second magnetic buckle is placed at the connection on the other side of the foot support and the ankle support, and the first magnetic buckle and the second magnetic buckle are magnetically connected for foot and ankle binding.

[0021] The fixed connection end of the binding strap is fixedly connected to the connection on one side of the foot support and the ankle support, the other end of the binding strap is connected to the first magnetic buckle, and the second magnetic buckle is fixed to the connection on the other side of the foot support and the ankle support. When the first magnetic buckle is magnetically connected to the second magnetic buckle, the binding of the ankle is completed.

[0022] A further technical solution of the utility model is: the elastic damping structure includes a sleeve, an adjusting member, a spring and a movable rod, the spring is placed in the sleeve, one end of the adjusting member is placed outside the sleeve, the other end of the adjusting member extends into the sleeve to contact the spring and is threadedly connected to the sleeve, one end of the movable rod is connected to the spring and the other end extends out of the sleeve to contact the calf support member.

[0023] By rotating the adjusting piece, the length of the adjusting piece extending into the sleeve can be adjusted, thereby adjusting the initial compression of the spring, thereby achieving the effect of adjusting the damping strength of the foot and ankle training device to meet the needs of different training intensities.

[0024] The beneficial effects of the present invention are as follows: when the binding structure of the present invention is in use, the fixed connection end of the binding belt is used to fix one end of the binding structure to the equipment, and the other end of the binding belt is magnetically connected through the first magnetic buckle and the second magnetic buckle. Specifically, the first magnetic buckle is stretched toward the second magnetic buckle. When the first magnetic buckle is stretched to a certain distance range from the second magnetic buckle, the first magnetic buckle will be magnetically connected to the second magnetic buckle by itself under the action of magnetic attraction, and at the same time, the first magnetic buckle and the second magnetic buckle can be limited by the limiting member. The binding structure does not require alignment by the user. It only needs to pull the first magnetic buckle to the range of magnetic connection with the second magnetic buckle, and the magnetic component can be accurately aligned by itself. The binding efficiency is high, and the limiting member also completes the limiting simultaneously when the binding is completed. Therefore, the present invention can not only improve the binding efficiency but also ensure the connection stability of the binding structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a binding structure provided by the utility model;

[0026] Figure 2 It is a structural schematic diagram of the first magnetic buckle provided by the utility model;

[0027] Figure 3 It is a structural schematic diagram of the second magnetic buckle provided by the utility model;

[0028] Figure 4 It is a structural schematic diagram of a foot and ankle training device provided by the utility model;

[0029] Figure 5 It is a schematic diagram of the internal structure of the elastic damping structure provided by the utility model.

[0030] Figure numerals: 1. binding strap, 2. magnetic assembly, 21. first magnetic buckle, 22. second magnetic buckle, 23. limiter, 24. connecting member, 25. limiter slot, 26. hollow, 27. connecting slot, 12. rotating button, 4. foot support member, 5. ankle support member, 6. calf support member, 7. elastic damping structure, 71. sleeve, 72. adjustment member, 73. spring, 74. movable rod. DETAILED DESCRIPTION

[0031] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0032] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of the present specification are only used to match the contents disclosed in the specification for people familiar with the technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present utility model, should still fall within the scope of the technical contents disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in the present specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present utility model. The change or adjustment of the relative relationship, without substantial change of the technical contents, should also be regarded as the scope of the implementation of the present utility model.

[0033] Embodiment 1:

[0034] Figure 1-3 A binding structure is shown, including a binding strap 1, one end of the binding strap 1 is a fixed connection end, and the other end of the binding strap 1 is provided with a magnetic component 2, the magnetic component 2 includes a first magnetic buckle 21 and a second magnetic buckle 22 magnetically connected to the first magnetic buckle 21, and the magnetic component 2 also includes a limiting member 23 for limiting the first magnetic buckle 21 and the second magnetic buckle 22.

[0035] When the binding structure in the utility model is in use, the fixed connection end of the binding belt is used to fix one end of the binding structure to the equipment, and the other end of the binding belt is magnetically connected through the first magnetic buckle and the second magnetic buckle. Specifically, the first magnetic buckle is stretched in the direction of the second magnetic buckle. When the first magnetic buckle is stretched to a certain distance range from the second magnetic buckle, the first magnetic buckle will be magnetically connected to the second magnetic buckle by itself under the action of magnetic attraction, and at the same time, the first magnetic buckle and the second magnetic buckle can be limited by the limiting piece; the binding structure does not require the user to align, only needs to pull the first magnetic buckle to the range of magnetic connection with the second magnetic buckle, and the magnetic component can be accurately aligned by itself, and the binding efficiency is high. Moreover, the limiting piece also completes the limiting simultaneously when the binding is completed. Therefore, the utility model can not only improve the binding efficiency but also ensure the connection stability of the binding structure.

[0036] As another embodiment, the positions of the first magnetic buckle and the second magnetic buckle can be swapped.

[0037] In this embodiment, the first magnetic buckle 21 is movably connected to the binding belt 1 through a connecting piece 24 of a hollow 26, a limiting groove 25 is provided on the first magnetic buckle 21, and the limiting piece 23 is placed on the second magnetic buckle 22 and passes through the hollow 26 to cooperate with the limiting groove 25.

[0038] The binding belt with the first magnetic buckle is stretched toward the second magnetic buckle. When the first magnetic buckle approaches the second magnetic buckle, the hollow 26 also approaches the limiter. When the first magnetic buckle is magnetically connected to the second magnetic buckle, the limiter is also inserted into the limiter groove along the hollow 26, that is, the first magnetic buckle and the second magnetic buckle are magnetically connected and the limiter is completed at the same time. Since the limiter passes through the hollow 26 and cooperates with the limiter groove, and the hollow 26 is between the first magnetic buckle and the binding belt, when the binding belt is subjected to tension, the first magnetic buckle and the second magnetic buckle will not be separated due to the influence of the tension under the blocking of the limiter, thus ensuring stability during use.

[0039] In this embodiment, the connecting member is a ring-shaped structure or a U-shaped structure.

[0040] In this embodiment, the connecting member is rotatably connected to the binding belt.

[0041] In this embodiment, the limiting member and the second magnetic buckle are an integral structure with higher strength.

[0042] In this embodiment, the limiting groove 25 is communicated with the hollow 26 , the limiting groove 25 has a structure protruding outward, and the limiting member 23 cooperates with the limiting groove 25 .

[0043] When the magnetic component completes the magnetic connection, the limit piece and the limit slot are matched at the same time, so the magnetic connection and the limit are completed at the same time; specifically, the limit slot is a structure that protrudes outward, and the limit piece is provided with a groove that cooperates with the protrusion. During the magnetic attraction process, the protrusion in the limit slot is inserted into the groove on the limit piece to complete the limit.

[0044] In this embodiment, the protrusion in the limiting groove is arc-shaped, which makes it easier for the limiting member to cooperate with the limiting groove.

[0045] In this embodiment, magnetic blocks are provided on one side of the first magnetic buckle 21 and the other side of the second magnetic buckle 22 that are opposite to each other.

[0046] The magnetic block is used for magnetic connection between the first magnetic buckle and the second magnetic buckle.

[0047] In this embodiment, a connecting groove 27 for connecting to a handle is provided at one end of the first magnetic buckle 21 away from the limiting member 23 .

[0048] A handle can be installed in the connection groove, so that the user can use the handle to pull the binding belt to magnetically connect the first magnetic buckle and the second magnetic buckle.

[0049] In this embodiment, the connection slot is in the shape of an elongated strip, and the handle is a braided rope. One end of the braided rope is passed through the elongated connection slot and tied into a knot, thereby completing the function of the connection slot for connecting the handle.

[0050] In this embodiment, a connecting rope is provided inside the binding belt 1, and a rotating button 12 for adjusting the length of the connecting rope is provided at the fixed connection end of the binding belt 1.

[0051] By turning the rotary button, the connecting rope in the binding belt can be shortened and the tightness range of the binding belt can be reduced; when the tightness range of the binding belt needs to be increased, the rotary button is pulled outward to make the connecting rope free, and then the binding belt is pulled to lengthen the connecting rope and the tightness range of the binding belt can be adjusted.

[0052] In this embodiment, one end of the connecting rope is fixedly connected to one end of a binding belt provided with a magnetic suction component, and the other end of the connecting rope is connected to a rotating button, which is at the fixed connection end of the binding belt.

[0053] In this embodiment, the binding belt has two layers, an inner layer and an outer layer, and the connecting rope is placed between the inner layer and the outer layer of the binding belt and arranged up and down, which has higher stability and better comfort.

[0054] The working principle of this embodiment: When the binding structure in the utility model is in use, the fixed connection end of the binding belt is used to fix one end of the binding structure to the device, and the other end of the binding belt is magnetically connected through the first magnetic buckle and the second magnetic buckle. Specifically, the first magnetic buckle is stretched in the direction of the second magnetic buckle. When the first magnetic buckle is stretched to a certain distance range from the second magnetic buckle, the first magnetic buckle will be magnetically connected to the second magnetic buckle by itself under the action of magnetic attraction, and at the same time, the first magnetic buckle and the second magnetic buckle can be limited by the limiting piece; the binding structure does not require the user to align, only needs to pull the first magnetic buckle to the range of magnetic connection with the second magnetic buckle, and the magnetic component can be accurately aligned by itself, and the binding efficiency is high. Moreover, the limiting piece also completes the limiting simultaneously when the binding is completed. Therefore, the utility model can not only improve the binding efficiency but also ensure the connection stability of the binding structure.

[0055] Embodiment 2:

[0056] like Figure 1-5 A foot and ankle training device is shown, comprising a foot support 4, an ankle support 5, and a calf support 6 connected in sequence, wherein the angle α between the foot support 4 and the ankle support 5 is an acute angle, the ankle support 5 is rotatably connected to the calf support 6, and an elastic damping structure 7 is provided on the rear side of the calf support 6 for contacting the calf support 6 in a worn state, and the foot and ankle training device also includes the binding structure described in Example 1 for foot positioning.

[0057] In this embodiment, the fixed connection end of the binding strap 1 is fixedly connected to the connection on one side of the foot support 4 and the ankle support 5, the other end of the binding strap 1 is connected to the first magnetic buckle 21, and the second magnetic buckle 22 is placed at the connection on the other side of the foot support 4 and the ankle support 5. The first magnetic buckle 21 and the second magnetic buckle 22 are magnetically connected for ankle binding.

[0058] The fixed connection end of the binding strap is fixedly connected to the connection on one side of the foot support 4 and the ankle support 5, the other end of the binding strap is connected to the first magnetic buckle, and the second magnetic buckle is fixed to the connection on the other side of the foot support 4 and the ankle support 5. When the first magnetic buckle is magnetically connected to the second magnetic buckle, the binding of the ankle is completed.

[0059] As another embodiment, the first magnetic buckle is arranged at the connection between the other side of the foot support 4 and the ankle support 5, and the second magnetic buckle is connected to the other end of the binding strap.

[0060] In this embodiment, the elastic damping structure 7 includes a sleeve 71, an adjusting member 72, a spring 73 and a movable rod 74. The spring 73 is placed in the sleeve 71, one end of the adjusting member 72 is placed outside the sleeve 71, the other end of the adjusting member 72 extends into the sleeve 71 to contact the spring 73 and is threadedly connected to the sleeve 71, and one end of the movable rod 74 is connected to the spring 73 and the other end extends out of the sleeve 71 to contact the calf support member 6.

[0061] The working principle of this embodiment is as follows: the angle between the foot support and the ankle support is an acute angle, and the elastic damping structure is on the rear side of the calf support. When worn, the front end of the foot support can be naturally lifted upward, and the elastic damping structure is in contact with the calf support at this time; after being worn, when the human body walks forward, the toes are downward, and the ankle support and the calf support rotate at this time, and the elastic damping structure is further compressed, and the elastic damping structure accumulates force; when the human body's foot is lifted during walking, the compressed elastic damping structure gives thrust to the calf support, and the toes of the human body are lifted, which not only solves the problem of foot drop without the need for motor drive, but also has high comfort and good experience; at the same time, considering the problem of convenient transportation, the calf support and the ankle support can be rotated, and the calf support and the elastic damping structure are in contact but not connected, so when stored, the calf support can be directly rotated to store the foot support inside the calf support, which takes up little space and is convenient for storage and transportation.

[0062] When binding the ankle, the ankle is bound through the binding structure. There is no need to pull the binding belt while watching the position to be connected. The utility model only needs to pull the binding belt into the magnetic suction range of the magnetic suction component, and the magnetic suction can be completed under the action of the magnetic suction, and the limiting is completed at the same time, which is convenient and quick, and greatly improves the efficiency of binding.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A binding structure, comprising a binding belt (1), one end of the binding belt (1) being a fixed connection end, characterized in that: The other end of the binding strap (1) is provided with a magnetic component (2), and the magnetic component (2) includes a first magnetic buckle (21) and a second magnetic buckle (22) magnetically connected to the first magnetic buckle (21), and the magnetic component (2) also includes a limiting member (23) for limiting the first magnetic buckle (21) and the second magnetic buckle (22).

2. A binding structure according to claim 1, characterized in that: The first magnetic buckle (21) is movably connected to the binding belt (1) through a hollow (26) connecting piece (24); a limiting groove (25) is provided on the first magnetic buckle (21); the limiting piece (23) is placed on the second magnetic buckle (22) and passes through the hollow (26) to cooperate with the limiting groove (25).

3. A binding structure according to claim 2, characterized in that: The limiting groove (25) is communicated with the hollow (26), the limiting groove (25) has a structure protruding outward, and the limiting member (23) cooperates with the limiting groove (25).

4. A binding structure according to claim 1, characterized in that: A magnetic block is provided on one side of the first magnetic buckle (21) and the other side of the second magnetic buckle (22) which are arranged opposite to each other.

5. A binding structure according to claim 1, characterized in that: An end of the first magnetic buckle (21) away from the limiting member (23) is provided with a connecting groove (27) for connecting to a handle.

6. A binding structure according to claim 1, characterized in that: A connecting rope is provided inside the binding belt (1), and a rotating button (12) for adjusting the length of the connecting rope is provided at the fixed connection end of the binding belt (1).

7. A foot and ankle training device, characterized in that: The foot and ankle training device comprises a foot support (4), an ankle support (5), and a calf support (6) which are connected in sequence, wherein the angle α between the foot support (4) and the ankle support (5) is an acute angle, the ankle support (5) is rotatably connected to the calf support (6), and an elastic damping structure (7) is provided on the rear side of the calf support (6) for contacting the calf support (6) when worn, and the foot and ankle training device also comprises a binding structure as described in any one of claims 1 to 6 for positioning the foot.

8. The foot and ankle training device according to claim 7, characterized in that: The fixed connection end of the binding strap (1) is fixedly connected to the connection between the foot support (4) and the ankle support (5) on one side, the other end of the binding strap (1) is connected to the first magnetic buckle (21), and the second magnetic buckle (22) is placed at the connection between the foot support (4) and the ankle support (5) on the other side, and the first magnetic buckle (21) and the second magnetic buckle (22) are magnetically connected for foot and ankle binding.

9. The foot and ankle training device according to claim 7, characterized in that: The elastic damping structure (7) comprises a sleeve (71), an adjusting member (72), a spring (73) and a movable rod (74); the spring (73) is placed in the sleeve (71); one end of the adjusting member (72) is placed outside the sleeve (71); the other end of the adjusting member (72) extends into the sleeve (71) to contact the spring (73) and is threadedly connected to the sleeve (71); one end of the movable rod (74) is connected to the spring (73) and the other end extends out of the sleeve (71) to contact the calf support member (6).

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