Ankle joint trauma recovery exercise equipment for orthopedics

Abstract

The application provides an orthopedic ankle joint trauma recovery exercise equipment, which structurally comprises a base, a support plate, a top cover, an upper handrail, a positioning body and an exercise structure. The exercise structure is improved, two groups of auxiliary structures are fixedly connected with the linkers of the push blocks through the sliding rails of the two groups of supporting blocks, so that the overall weight of the push blocks can be increased, the weight of the overall push blocks can be adjusted according to the actual situation, the training intensity is gradually increased, the use intensity of the exercise equipment can be effectively improved, the parallel blocks of the push blocks can be combined with the cover at the front end of the positioning groove to restrict the toe position, the edges of the parallel blocks are clamped by the clamping blocks, the fixing effect on the foot and the ankle joint position can be effectively improved, the falling during exercise is prevented, and the balance bars arranged at the edge positions of the two groups of parallel blocks can ensure that the two groups of parallel blocks slide at the same time, so that the stability of the simultaneous exercise of the feet is ensured.

Description

Technical Field

[0001] This invention relates to the field of orthopedic ankle joint rehabilitation technology, and more specifically to an orthopedic ankle joint trauma rehabilitation exercise device. Background Technology

[0002] Ankle injury refers to damage to the ankle joint and its surrounding soft tissues (such as ligaments, tendons, and bones) caused by external force. After scientific medical treatment, ankle injuries can be assisted by a scientifically customized rehabilitation training plan using exercise equipment. This can effectively avoid joint stiffness, muscle atrophy, and loss of proprioception during recovery. Therefore, with the help of scientific exercise equipment, ankle joint function can be scientifically reconstructed in a safe and controllable environment, and future re-injuries can be prevented to the greatest extent possible. In summary, the inventors have found that existing exercise equipment has the following main drawbacks: Because the ankle joint exercise position of current exercise equipment is pushed by the patient's foot, simple self-push exercise will result in the patient's foot exerting the same force throughout the exercise process, leading to an inability to adjust the exercise intensity. Continuing to exercise with the same force will reduce the efficiency of the patient's recovery exercise. At the same time, after the patient adapts to the current force, the exercise equipment will be unable to help the patient to carry out further recovery exercises, thus reducing the intensity of use of the exercise equipment. Summary of the Invention

[0003] The technical solution adopted by the present invention to achieve the technical objective is: an orthopedic ankle joint trauma recovery exercise device, the structure of which includes: a base, a support plate, a top cover, an upper handrail, a positioning body, and an exercise structure. The upper end of the base is perpendicular to the support plate, and the top cover is located on the upper end of the support plate and communicates with the upper part of the base. The lower edge of the top cover is provided with an upper handrail and communicates with the positioning body. The positioning body is perpendicular to the upper part of the base and communicates with the exercise structure.

[0004] As a further improvement of the present invention, the exercise structure is provided with an insert block, the upper end of which is connected to a magnetic plate and determines the position of the support block. A slide rail is opened on the side of the support block and an auxiliary structure is mounted thereon. One end of the auxiliary structure is connected to a push block and the lower end of the push block is embedded in the sliding groove and in contact with the restraining block.

[0005] As a further improvement of the present invention, the push block is also provided with a slider, the upper end of the slider is provided with a parallel block and the outer side of the parallel block is connected with a connector and a balance bar, a positioning groove is opened on the surface of the balance block and equipped with a clamping block, and a cover is connected to the upper part of the front end of the balance block to cover and restrain the upper part of the positioning groove.

[0006] As a further improvement of the present invention, the positions of the two sets of support blocks on the base are determined by the insertion block and magnetic plate of the exercise structure, and then the auxiliary structure of the slide rail is detachably threadedly connected to the connecting part of the push block edge. The push block is positionally restrained by the restraining block through the sliding groove, and the foot is positioned by the positioning groove of the parallel block, the clamping block, and the cover.

[0007] As a further improvement of the present invention, the base and the support plate form an "L" shape, and the upper handrail of the lower layer of the top cover of the upper end of the support plate is set in a vertical position and communicates with the positioning body. The exercise structure is set in a parallel position on the surface of the base and communicates with the positioning body.

[0008] As a further improvement of the present invention, the insert block is set in a vertical orientation and the magnetic plate is parallel to the surface of the base. The slide rail on the side of the support block is opened in a straight line orientation and the auxiliary structure is threadedly connected to the push block. The sliding groove is opened in a vertical orientation at the center of the restraining block.

[0009] As a further improvement of the present invention, the slider and the parallel block form a "T" shape, the connecting part of the parallel block has an internal thread groove, the balance bar is provided with three bars and connects the two parallel blocks, the inner wall of the positioning groove is parallel and the two clamping blocks it carries are rubber products, the cover is solid and combined with the positioning groove to restrain the position of the toes.

[0010] As a further improvement of the present invention, the auxiliary structure is provided with an anti-deviation block, one end of which is welded with a counterweight and the upper and lower ends of the counterweight are provided with sliding plates, and a support column is provided at the center of the side of the counterweight and an extension rod is connected inside.

[0011] As a further improvement of the present invention, the counterweight is embedded in the slide rail position of the support block by means of the anti-deviation block and the sliding plate, and is manually operated to be inserted and fixedly connected to the connecting piece of the parallel block by means of the extension rod of the support column.

[0012] As a further improvement of the present invention, the extension rod is also provided with an adsorption block, the lower end of the adsorption block is provided with a rubber sheet, and a threaded rod is provided at the center of the lower end of the rubber sheet, and a sliding rod is connected to the lower end of the threaded rod.

[0013] As a further improvement of the present invention, the adsorption block and the rubber sheet are parallel to each other and are located at the same center point. The threaded rod mounted at the lower center of the rubber sheet is set in a vertical orientation and is on the same central vertical line as the slide rod.

[0014] As a further improvement of the present invention, the positioning body is provided with a back plate, the surface of the back plate is equipped with a load-bearing block, and a flexible pad is connected to the upper layer of the load-bearing block and a lower handrail is provided at the edge position. A groove is opened at the front end of the load-bearing block to communicate with the exercise structure.

[0015] As a further improvement of the present invention, the back panel is a solid rectangular shape and the load-bearing block forms a normal seat shape with it. The upper layer of the load-bearing block is covered by a flexible pad and the lower ends of the armrests penetrate through the left and right ends. The groove is opened vertically at the front end of the load-bearing block and there are two grooves in total.

[0016] As a further improvement of the present invention, a contact layer is added at the solid right-angle corner of the load-bearing block and the groove. The contact layer is located at the edge of the air cushion ball, and an overlapping block is provided at the lower side of the air cushion ball, with a magnet plate connected to one end of the lower layer of the overlapping block.

[0017] As a further improvement of the present invention, the contact layer and the contact position between the air cushion ball and the lower limb are arc-shaped, and the overlapping block and the position of the magnet plate form an "L" shape that matches the shape of the groove and the corner position of the load-bearing block.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention improves the training structure by using two sets of support blocks with slide rails equipped with two sets of auxiliary structures and connecting parts for the push block to be interwoven and fixedly connected. This increases the overall weight of the push block, allowing the weight of the push block to be adjusted according to actual conditions, gradually increasing the training intensity and effectively improving the use of the training equipment. Furthermore, the parallel blocks of the push block, combined with the cover at the front end of the positioning groove, restrain the toe position and use clamping blocks to hold its edges, effectively improving the fixation effect on the foot and ankle joint, preventing slippage during exercise. At the same time, the balance bars set at the edges of the two sets of parallel blocks ensure that the two sets of parallel blocks slide simultaneously, ensuring the stability of the foot during simultaneous exercise.

[0019] 2. With the improvement of the auxiliary structure, the anti-deviation block set at one end of the counterweight can effectively improve the connection stability with the inner wall of the slide rail. Then, the upper and lower sliding plates can improve the smoothness of sliding. Then, the extension rod inside the support can be connected to the connecting parts of the edge of the parallel block according to the actual situation. Thus, the effect of increasing or decreasing weight can be achieved through the detachable effect, thereby improving the stability of recovery exercise.

[0020] 3. This invention, after improving the positioning body, effectively allows the patient to sit stably through the back plate and the weight-bearing block. Then, the groove is used to determine the position of the patient's lower limbs, so that the matching accuracy between the patient's lower limb position and the position of the exercise structure can be improved through the groove, which further improves the precision and stability of ankle joint exercise. Subsequently, the air cushion ball added at the corner of the weight-bearing block and the groove can contact the skin surface of the lower limb. The flexible state replaces the original solid metal state, preventing the discomfort caused by the continuous friction between the skin surface of the lower limb and the metal corner during exercise, thereby achieving a safe and comfortable exercise effect. Attached Figure Description

[0021] Figure 1 This is a structural diagram of an orthopedic ankle joint trauma rehabilitation exercise device.

[0022] Figure 2 This is a three-dimensional structural diagram of an improved exercise structure.

[0023] Figure 3 This is a schematic diagram of a three-dimensional structure after an improvement on the push block.

[0024] Figure 4 This is a three-dimensional structural diagram of an improved auxiliary structure.

[0025] Figure 5 This is a three-dimensional structural diagram of an improved extension rod.

[0026] Figure 6 This is a schematic diagram of a three-dimensional structure of an improved positioning body.

[0027] Figure 7 This is a three-dimensional structural diagram of a load-bearing block and a newly added component at the corner of a groove.

[0028] In the diagram: Base-1, Support plate-2, Top cover-3, Upper handrail-4, Positioning body-5, Exercise structure-6; Insert block-61, magnetic suction plate-62, support block-63, slide rail-64, auxiliary structure-65, push block-66, sliding groove-67, restraint block-68; Slider-661, Parallel block-662, Connector-663, Balance bar-664, Positioning groove-665, Clamping block-666, Cover-667; Anti-deviation block-651, counterweight block-652, sliding plate-653, support column-654, extension rod-655; Adsorption block-6551, rubber sheet-6552, threaded rod-6553, slide rod-6554; Back panel - 51, load-bearing block - 52, flexible pad - 53, lower armrest - 54, groove - 55; Contact layer-551, air cushion ball-552, overlapping block-553, magnetic plate-554. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings: Example 1: Figures 1 to 5 As shown: This invention provides an orthopedic ankle joint trauma rehabilitation exercise device. Its structure includes: a base 1, a support plate 2, a top cover 3, an upper handrail 4, a positioning body 5, and an exercise structure 6. The upper end of the base 1 is perpendicular to the support plate 2, and the top cover 3 is located on the upper end of the support plate 2 and communicates with the upper part of the base 1. The lower edge of the top cover 3 is provided with an upper handrail 4 and communicates with the positioning body 5. The positioning body 5 is perpendicular to the upper part of the base 1 and communicates with the exercise structure 6.

[0030] The exercise structure 6 is provided with an insert block 61. The upper end of the insert block 61 is connected to a magnetic suction plate 62 and determines the position of the support block 63. A slide rail 64 is opened on the side of the support block 63 and an auxiliary structure 65 is mounted thereon. One end of the auxiliary structure 65 is connected to a push block 66 and the lower end of the push block 66 is embedded in the sliding groove 67 and in contact with the restraining block 68.

[0031] The push block 66 is also provided with a slider 661. The upper end of the slider 661 is provided with a parallel block 662, and the outer side of the parallel block 662 is connected with a connector 663 and a balance bar 664. A positioning groove 665 is opened on the surface of the balance block 662 and equipped with a clamping block 666. A cover 667 is also connected to the upper front end of the balance block 662 to cover and restrain the upper front end of the positioning groove 665.

[0032] The positions of the two sets of support blocks 63 on the base 1 are determined by the insertion block 61 and magnetic suction plate 62 of the exercise structure 6. Then, the auxiliary structure 65 of the slide rail 64 is detachably threadedly connected to the connecting piece 663 on the edge of the push block 66. The push block 66 is restrained in position by the restraining block 68 through the sliding groove 67. At the same time, the foot is positioned by the positioning groove 665 of the parallel block 662, the clamping block 666, and the cover 667.

[0033] The base 1 and the support plate 2 form an "L" shape, and the upper handrail 4 of the lower layer of the top cover 3 of the upper end of the support plate 2 is set in a vertical position and communicates with the positioning body 5. The exercise structure 6 is set in a parallel position on the surface of the base 1 and communicates with the positioning body 5.

[0034] The insert block 61 is set in a vertical orientation and the magnetic suction plate 62 is parallel to the surface of the base 1. The slide rail 64 on the side of the support block 63 is opened in a straight orientation and the auxiliary structure 65 is threadedly connected to the push block 66. The sliding groove 67 is opened in a vertical orientation at the center of the restraining block 68.

[0035] The slider 661 and the parallel block 662 form a "T" shape. The connecting part 663 of the parallel block 662 has an internal threaded groove. There are three balance bars 664 that connect the two parallel blocks 662. The inner wall of the positioning groove 665 is parallel and the two clamping blocks 666 it carries are made of rubber. The cover 667 is solid and, together with the positioning groove 665, restrains the position of the toes.

[0036] The auxiliary structure 65 is provided with an anti-deviation block 651. One end of the anti-deviation block 651 is welded with a counterweight 652 and the upper and lower ends of the counterweight 652 are provided with sliding plates 653. A support column 654 is provided at the center of the side of the counterweight 652 and an extension rod 655 is connected inside.

[0037] The counterweight 652 is embedded in the slide rail 64 of the support block 63 through the anti-deviation block 651 and the slide plate 653, and is manually connected to the connector 663 of the parallel block 662 by the extension rod 655 of the support column 654.

[0038] The extension rod 655 is also provided with an adsorption block 6551. The lower end of the adsorption block 6551 is provided with a rubber sheet 6552, and a threaded rod 6553 is provided at the center of the lower end of the rubber sheet 6552. The lower end of the threaded rod 6553 is also connected to a sliding rod 6554.

[0039] The adsorption block 6551 and the rubber sheet 6552 are parallel to each other and are located at the same center point. The threaded rod 6553 mounted at the lower center of the rubber sheet 6552 is set in a vertical position and is on the same central vertical line as the slide rod 6554.

[0040] The specific functions and operation procedures of this embodiment are as follows: In this invention, the orthopedic ankle joint trauma recovery exercise device uses the base 1 and support plate 2 to determine the positions of the top cover 3 and the positioning body 5. The patient can then slowly sit on the positioning body 5 with the assistance of the upper armrest 4 of the top cover 3. Based on the position of the positioning body 5, the foot and ankle joint can be inserted into the exercise structure 6 for scientific force application, achieving an auxiliary recovery effect. The two support blocks 63 of the exercise structure 6 can be vertically installed on the surface of the base 1 via the lower insertion block 61 and magnetic suction plate 62. Simultaneously, the position of the auxiliary structure 65 is determined by the slide rail 64. Subsequently, the push block 66 can be restrained by the restraining block 68 through the sliding groove 67, allowing the patient to... After the athlete's foot is inserted into the positioning groove 665 of the parallel block 662, the toes will pass through the front end of the positioning groove 665 and be covered and restrained by the top cover 667. The edges are then clamped by the clamping block 666, achieving a positioning effect. During push-and-push training, the lower slider 661 of the parallel block 662 will slide linearly in the sliding groove 67, achieving a stable training effect. During the process, the two sets of parallel blocks 662 can be connected together by the balance bar 664, allowing them to move with the same amplitude, ensuring the training stability of the ankle joint. The connection can then be used as needed. The component 663 is spliced ​​with the auxiliary structure 65, allowing the auxiliary structure 65 to increase the weight of the parallel block 662 through weight-adding, thus achieving an adjustable weight effect. This allows for gradual increases in training intensity according to actual conditions, further enhancing the recovery training effect. The counterweight 652 of the auxiliary structure 65 can be embedded in the slide rail 64 via the anti-deviation block 651, preventing it from falling off during sliding. Then, the upper and lower sliding plates 653 contact the upper and lower layers inside the slide rail 64, achieving a parallel sliding effect. Subsequently, the support column 654 at one end of the counterweight 652, through its cylindrical shape, determines the position of the extension rod 655, allowing the thread of the extension rod 655 to... The rod 6553 can carry the sliding rod 6554 and embed it inside the support column 654. When it needs to be connected with the connector 663, first rotate the adsorption block 6551 to drive the rubber sheet 6552 and the threaded rod 6553 out of the support column 654. After the threaded rod 6553 is completely detached from the support column 654, the adsorption block 6551 can be embedded into the connector 663 of the parallel block 662 by pulling out the sliding rod 6554, thus completing the connection. At the same time, one end of the sliding rod 6554 is still inside the support column 654 and will not fall off. This also achieves the effect of quick disassembly and control, improving the usability of the exercise equipment.

[0041] Example 2: Figures 6 to 7 As shown: This invention provides an orthopedic ankle joint trauma rehabilitation exercise device. Its structure includes a back plate 51 on the positioning body 5, a load-bearing block 52 on the surface of the back plate 51, a flexible pad 53 connected to the upper layer of the load-bearing block 52 and a lower handrail 54 on the edge, and a groove 55 opened at the front end of the load-bearing block 52 to communicate with the exercise structure 6.

[0042] The back panel 51 is a solid rectangular shape and the load-bearing block 52 forms a normal seat shape with it. The upper part of the load-bearing block 52 is covered by a flexible pad 53 and the lower ends of the armrests 54 penetrate through the left and right ends. The groove 55 is opened vertically at the front end of the load-bearing block 52 and there are two grooves in total.

[0043] In this design, a contact layer 551 is added at the solid right-angle corner of the load-bearing block 52 and the groove 55. The contact layer 551 is located at the edge of the air cushion ball 552, and an overlapping block 553 is located at the lower side of the air cushion ball 552. A magnet plate 554 is connected to one end of the lower layer of the overlapping block 553.

[0044] The contact layer 551 and the air cushion ball 552 are in an arc shape when they contact the lower limbs, and the overlapping block 553 and the magnet plate 554 form an "L" shape that matches the shape of the groove 55 and the corner of the load-bearing block 52.

[0045] The specific functions and operation procedures of this embodiment are as follows: In this invention, the load-bearing block 52 of the positioning body 5 can be combined with the back panel 51 to form a seat shape. Then, the flexible pad 53 on the upper layer of the load-bearing block 52 will directly contact the patient's buttocks, replacing the original solid metal surface contact effect and improving the comfort during exercise. At the same time, the position of the lower armrest 54 can help the patient maintain balance during exercise. Furthermore, the two grooves 55 opened at the position of the load-bearing block 52 can limit the patient's lower limbs, thereby improving the alignment accuracy with the exercise structure 6 and avoiding excessive positional deviation that would reduce stability during training. Subsequently, the load-bearing... The air cushion ball 552, located at the corner of block 52 and groove 55, can contact the patient's lower limb skin through the contact layer 551, avoiding injury caused by friction at the metal corner. This further enhances the protection of the patient's lower limb skin. The air cushion ball 552 can be stably installed at the corner of groove 55 and load-bearing block 52 through overlapping block 553 and magnet plate 554, preventing it from falling off during continuous friction. This further improves the intensity and effectiveness of the exercise equipment and enhances the precision and stability of the patient's ankle joint exercise.

[0046] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solutions described in this invention, or by designing similar technical solutions by those skilled in the art under the inspiration of the technical solutions described in this invention, falls within the protection scope of this invention.

Claims

1. An orthopedic ankle joint trauma rehabilitation exercise device, the structure of which includes: The base (1), support plate (2), top cover (3), upper handrail (4), positioning body (5), and exercise structure (6) are provided. The upper end of the base (1) is perpendicular to the support plate (2), and the top cover (3) is located on the upper end of the support plate (2) and communicates with the upper part of the base (1). The lower edge of the top cover (3) is provided with an upper handrail (4) and communicates with the positioning body (5). The positioning body (5) is perpendicular to the upper part of the base (1) and communicates with the exercise structure (6). The base (1) is characterized by the following features: The exercise structure (6) is provided with an insert block (61), the upper end of the insert block (61) is connected to a magnetic suction plate (62) and determines the position of the support block (63), a slide rail (64) is opened on the side of the support block (63) and an auxiliary structure (65) is mounted thereon, one end of the auxiliary structure (65) is connected to a push block (66) and the lower end of the push block (66) is embedded in the sliding groove (67) and in contact with the restraining block (68); The push block (66) is also provided with a slider (661). A parallel block (662) is provided at the upper end of the slider (661), and a connector (663) and a balance bar (664) are connected to the outer side of the parallel block (662). A positioning groove (665) is opened on the surface of the balance block (662) and a clamping block (666) is provided. A cover (667) is also connected to the upper front end of the balance block (662) to cover and restrain the upper front end of the positioning groove (665). The positions of the two sets of support blocks (63) on the base (1) are determined by the insertion block (61) and magnetic plate (62) of the exercise structure (6). Then, the auxiliary structure (65) of the slide rail (64) is detachably threaded to the connecting piece (663) on the edge of the push block (66). The push block (66) is restrained by the restraining block (68) through the sliding groove (67). At the same time, the foot is positioned by the positioning groove (665) of the parallel block (662), the clamping block (666), and the cover (667).

2. The orthopedic ankle joint trauma rehabilitation exercise device according to claim 1, characterized in that: The base (1) and the support plate (2) form an "L" shape, and the upper handrail (4) of the upper top cover (3) of the support plate (2) is set in a vertical position and communicates with the positioning body (5). The exercise structure (6) is set in a parallel position on the surface of the base (1) and communicates with the positioning body (5).

3. The orthopedic ankle joint trauma rehabilitation exercise device according to claim 1, characterized in that: The insert (61) is set in a vertical orientation and the magnetic plate (62) is parallel to the surface of the base (1). The slide rail (64) on the side of the support block (63) is opened in a straight orientation and the auxiliary structure (65) is threadedly connected to the push block (66). The sliding groove (67) is opened in a vertical orientation at the center of the restraining block (68).

4. The orthopedic ankle joint trauma rehabilitation exercise device according to claim 1, characterized in that: The slider (661) and the parallel block (662) form a "T" shape. The connecting part (663) of the parallel block (662) has an internal thread groove. There are three balance bars (664) that connect the two parallel blocks (662). The inner wall of the positioning groove (665) is parallel and the two clamping blocks (666) it carries are made of rubber. The cover (667) is solid and, together with the positioning groove (665), restrains the position of the toes.

5. The orthopedic ankle joint trauma rehabilitation exercise device according to claim 1, characterized in that: The auxiliary structure (65) is provided with an anti-deviation block (651), a counterweight block (652) is welded to one end of the anti-deviation block (651), and a sliding plate (653) is provided at the upper and lower ends of the counterweight block (652). A support column (654) is provided at the center of the side of the counterweight block (652) and an extension rod (655) is connected inside. The counterweight (652) is embedded in the slide rail (64) of the support block (63) through the anti-deviation block (651) and the slide plate (653), and is manually connected to the connector (663) of the parallel block (662) by the extension rod (655) of the support column (654).

6. The orthopedic ankle joint trauma rehabilitation exercise device according to claim 5, characterized in that: The extension rod (655) is also provided with an adsorption block (6551), the lower end of the adsorption block (6551) is provided with a rubber sheet (6552), and a threaded rod (6553) is provided at the center of the lower end of the rubber sheet (6552), and a sliding rod (6554) is connected to the lower end of the threaded rod (6553). The adsorption block (6551) and the rubber sheet (6552) are parallel to each other and are located at the same center point. The threaded rod (6553) mounted at the lower center of the rubber sheet (6552) is set in a vertical position and is on the same center vertical line as the slide rod (6554).

7. The orthopedic ankle joint trauma rehabilitation exercise device according to claim 1, characterized in that: The positioning body (5) is provided with a back plate (51), the surface of the back plate (51) is equipped with a load-bearing block (52), and a flexible pad (53) is connected to the upper layer of the load-bearing block (52) and a lower handrail (54) is provided at the edge. A groove (55) is opened at the front end of the load-bearing block (52) to communicate with the exercise structure (6). The back panel (51) is a solid rectangular shape and the load-bearing block (52) forms a normal seat shape with it. The upper part of the load-bearing block (52) is covered by a flexible pad (53) and the lower ends of the armrests (54) penetrate the left and right ends. The groove (55) is opened vertically at the front end of the load-bearing block (52) and there are two grooves.

8. The orthopedic ankle joint trauma rehabilitation exercise device according to claim 7, characterized in that: A contact layer (551) is newly provided at the solid right-angle corner of the load-bearing block (52) and the groove (55). The contact layer (551) is provided at the edge of the air cushion ball (552), and an overlapping block (553) is provided at the lower side of the air cushion ball (552). A magnet plate (554) is connected to one end of the lower layer of the overlapping block (553). The contact layer (551) and the air cushion ball (552) are in an arc shape at the contact position with the lower limb, and the overlapping block (553) and the magnet plate (554) form an "L" shape that matches the shape of the groove (55) and the corner position of the load-bearing block (52).

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