Bidirectional limiting rotary handle and body builder

Abstract

The utility model discloses a two-way limiting rotating handle and a body builder, and relates to the field of body building equipment, the technical scheme is that the two-way limiting rotating handle comprises a frame body structure and a handle supporting structure, and the handle supporting structure comprises handle connecting parts which are symmetrically arranged on the two sides; the two rotating assemblies are connected with the handle supporting structure through the handle connecting parts correspondingly, and each rotating assembly is provided with at least one grip. The limiting assembly is located at the joint of the rotating assembly and the handle supporting structure and comprises two limiting parts which are limited in the opposite directions of the rotating assembly. The multi-muscle-group training device has the advantages that the two-way limiting rotating handle can freely adjust holding gestures at multiple angles, the requirements of different users are met, and multi-muscle-group training is achieved; the limiting assembly limits rotation of the grip, uncontrolled deflection of the grip in training is avoided, the difficulty of beginners and trainers with small strength is lowered, and the training safety and effect are improved.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment, specifically a bidirectional limiting rotating handle and a fitness machine. Background Technology

[0002] With the current surge in national fitness enthusiasm, significant improvements in socioeconomic levels, and a comprehensive awakening of public health awareness, scientific fitness has become an indispensable part of modern life. Fitness equipment, with its professional and systematic training characteristics, has become the preferred tool for many fitness enthusiasts to shape their bodies and enhance muscle strength. Especially for targeted muscle strengthening training of specific body parts, various specialized fitness equipment play an irreplaceable role.

[0003] The biceps brachii, also known as the biceps brachii, is located on the front of the upper arm. It is spindle-shaped and spans the shoulder and elbow joints. It is a key muscle connecting the scapula and radius, and its main functions are elbow flexion, forearm supination, and assisting in upper arm flexion. It is crucial for daily upper limb activities and strength training. For both men and women, the biceps are a body part that is easily displayed in summer clothing. Therefore, biceps training is highly valued by fitness enthusiasts.

[0004] Most mainstream biceps training equipment on the market today adopts a core architecture design that combines a rotating frame with handles. These devices typically utilize adjustable load modules on the rotating frame, such as detachable weight plates, hydraulic dampers, or elastic resistance devices, to control training intensity and effectively enhance the training results. The handles, on the other hand, generally employ a traditional design with a rigid connection to the rotating frame. However, they are often customized in terms of shape, grip curvature, and surface texture to accommodate diverse grip postures during training, such as overhand, underhand, and vertical grips.

[0005] However, this design based on a fixed handle structure has significant technical limitations. On the one hand, due to significant individual differences in human physiological characteristics (including height, arm length, grip strength distribution, etc.), a fixed handle shape is difficult to adapt to different users, easily leading to hand fatigue, local pressure, or even muscle strain during prolonged training. On the other hand, the fixed connection method restricts the handle's freedom of movement during exercise, making it impossible to flexibly adjust according to changes in training movements. This greatly limits the diversity and flexibility of training movements, making it difficult to meet users' advanced needs for diverse and refined training movements, and to some extent affecting the optimization and improvement of training results. Utility Model Content

[0006] To address one of the shortcomings of existing technologies, this utility model provides a bidirectional limiting rotary handle, thus solving the problem.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a bidirectional limiting rotary handle, comprising:

[0008] The handle support structure is a frame structure with symmetrical sides. The handle support structure includes handle connecting parts symmetrically arranged on both sides.

[0009] There are two rotating components, each connected to the handle support structure via the handle connector on one side;

[0010] A grip is provided on at least one of the rotating components; the grip is rotatably connected via the rotating components and the handle support structure.

[0011] A limiting component is provided at the connection between the rotating component and the handle support structure; the limiting component includes two limiting parts, which limit the rotation of the rotating component in rotation direction one and rotation direction two, respectively, and the rotation direction one and rotation direction two are opposite to each other; the rotation angle of the rotating component between the two limiting parts is less than 360°.

[0012] Preferably, the handle support structure further includes:

[0013] The central support section can be rotatably connected to the external structure;

[0014] A side support is provided on each side of the central support, and the side support and the central support are fixedly connected.

[0015] The handle connector and the side support are fixedly connected.

[0016] Preferably, both the middle support and the side support are rods;

[0017] One end of the side support is fixedly connected to one end of the middle support, and the other end extends away from the middle support.

[0018] The handle connection is fixedly located at the end of the side support that is away from the middle support.

[0019] Preferably, the portion of the middle support corresponding to the external connection structure is a round rod.

[0020] Preferably, the handle connecting part is a cylindrical structure with an internal cylindrical cavity; the outer wall of the handle connecting part and the side support part are fixedly connected.

[0021] The rotating assembly includes:

[0022] A socket fitting is fitted into the cavity of the handle connection portion;

[0023] A connector is disposed between the socket and the grip, and the grip is connected to the socket via the connector.

[0024] Preferably, the socket and the handle connection are rotatably connected;

[0025] The connector and the socket are fixedly connected.

[0026] Preferably, the socket and the handle connection are fixedly connected;

[0027] The connector and the sleeve are rotatably connected.

[0028] Preferably, the limiting component includes:

[0029] A fixed limiting component is fixedly connected to the handle support structure, and the limiting part is disposed on both sides of the fixed limiting component;

[0030] The movable limiting member is fixedly connected to the rotating component or the handle, and the movable limiting member can abut against the limiting part of the fixed limiting member.

[0031] Preferably, the fixing limiting member is a plate, and the limiting part is two recessed structures formed on both sides of the fixing limiting member;

[0032] The movable limiting component is a column structure fixedly mounted on the connector.

[0033] A fitness device that uses a bidirectional limiting rotary handle as described above.

[0034] Preferably, it includes:

[0035] The base is a frame that can be placed on the ground;

[0036] The swing frame is rotatably connected to the base, and the bidirectional limiting rotation handle is provided on one side of the swing frame;

[0037] The counterweight assembly, linked to the swing frame, can increase the load on the swing frame during movement.

[0038] Preferably, a seat cushion and an elbow pad are fixedly provided on the base;

[0039] The swing frame includes:

[0040] The main frame is a U-shaped frame, and the elbow pad is located in the opening area of ​​the main frame;

[0041] The bidirectional limiting rotary handle is located on the side of the main frame away from the elbow pad.

[0042] Preferably, the swing frame further includes:

[0043] The sub-frame is located in the middle of the side of the main frame away from the elbow pad; one edge of the sub-frame is hinged to the main frame;

[0044] The central support and the subframe of the bidirectional limiting rotary handle are rotatably connected.

[0045] Compared to existing technologies, this solution offers the following advantages: The bidirectional limiting rotating handle allows for free adjustment of the grip angle during biceps training, meeting the diverse needs of different users and enabling training of multiple muscle groups including the biceps, forearm, and brachialis. Furthermore, the rotating handle incorporates a limiting component to restrict the grip's rotation position, effectively preventing uncontrolled back-and-forth deflection during training. This reduces the difficulty for beginners or those with weak biceps, allowing them to focus more on the training movement without expending excessive effort to maintain a fixed handle angle. This enhances both training safety and effectiveness. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the bidirectional limiting rotary handle structure according to an embodiment of this application;

[0047] Figure 2 This is a reference for the usage state of the bidirectional limiting rotary handle in this application embodiment. Figure 1 ;

[0048] Figure 3 This is a reference for the usage state of the bidirectional limiting rotary handle in this application embodiment. Figure 2 ;

[0049] Figure 4 This is a reference for the usage state of the bidirectional limiting rotary handle in this application embodiment. Figure 3 ;

[0050] Figure 5 This is a reference for the usage state of the bidirectional limiting rotary handle in this application embodiment. Figure 4 ;

[0051] Figure 6 This is an exploded view of the rotating component according to an embodiment of this application;

[0052] Figure 7 This is a schematic diagram of the fitness equipment structure according to an embodiment of this application. Figure 1 ;

[0053] Figure 8 This is a schematic diagram of the fitness equipment structure according to an embodiment of this application. Figure 2 .

[0054] In the picture:

[0055] 1. Base; 11. Seat cushion; 12. Elbow rest;

[0056] 2. Swing frame; 21. Main frame; 22. Sub-frame;

[0057] 3. Two-way limit rotating handle;

[0058] 31. Support structure; 311. Handle connection; 312. Middle support; 313. Side support; 32. Rotating assembly; 321. Sleeve; 322. Connector; 323. Copper sleeve; 324. Retaining ring; 325. End cap; 326. Bolt; 33. Grip; 34. Limiting assembly;

[0059] 4. Counterweight components. Detailed Implementation

[0060] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0061] Please see Figures 1-6 This application provides the following technical solutions:

[0062] A bidirectional limiting rotary handle includes a handle support structure 31, a rotating assembly 32, a grip 33, and a limiting assembly 34. The handle support structure 31 adopts a frame structure with symmetrical arrangement on both sides, and includes handle connecting parts 311 symmetrically arranged on both sides. A rotating assembly 32 is provided at each handle connecting part 311, meaning each rotating assembly 32 is connected to the handle support structure 31 via a handle connecting part 311 on one side. A grip 33 is provided on each rotating assembly 32, and the grip 33 is rotatably connected to the handle support structure 31 via the rotating assembly 32. The limiting assembly 34 is located at the connection between the rotating assembly 32 and the handle support structure 31; the limiting assembly 34 includes two limiting parts, which limit the rotation of the rotating assembly 32 in two opposite directions, respectively. The rotation angle of the rotating assembly 32 between the two limiting parts is less than 360°. For ease of explanation, ... Figures 2 to 5 The directions shown are for reference only. Rotation direction one and rotation direction two are clockwise and counterclockwise rotations, respectively.

[0063] This handle is used in fitness equipment, mainly for biceps training. When performing biceps training, the user holds one handle in each hand 33. Figures 2 to 5 The display direction is the user's viewing angle when in motion. Figure 2 and Figure 3The images show the positions of the grip 33 in the two limiting states, from... Figure 2 Rotating the position clockwise will turn the grip 33 to... Figure 3 The indicated state, and is limited in this state, unable to continue rotating clockwise. From Figure 3 As shown, rotating counterclockwise allows the handle 33 to rotate to... Figure 2 The location shown is in Figure 2 It is restricted in this state and cannot continue to rotate counterclockwise.

[0064] In other words, from the perspective of using oneself, in Figure 2 In this position, the hands grip the two handles 33 at an inward "V" angle, and biceps exercises can be performed while maintaining this grip posture. Figure 3 It involves the user using a figure-eight hand gesture to hold the object.

[0065] This design utilizes a rotatable grip 33, providing users with a richer exercise experience. Experienced users, those with skilled movements, or those with good self-control can choose different grip angles according to their needs, such as... Figure 4 The horizontal grip shown allows for training in both overhand and underhand grips. Figure 5 The vertical grip shown is for hammer training. Other grip angles not shown in the accompanying diagrams are also available, allowing different users to choose according to their needs. While simply rotating the handle can train multiple muscle groups such as the biceps, forearm, and brachialis, it's not beginner-friendly. The free rotation of the handle means the user must concentrate their strength to keep it at a fixed angle. For beginners or those with weak biceps, this increases the difficulty of the training. Poor control can cause the handle to constantly shift back and forth during the training, not only failing to achieve the training purpose but also potentially injuring muscles. Therefore, for less experienced users, the handle can be rotated directly to angle 33. Figure 2 and Figure 3 The limit angle shown is used. In these two states, the grip 33 is fixed in the limit position, which can effectively prevent injury caused by the grip 33 rotating due to unstable strength control during exercise.

[0066] Based on the above implementation scheme, the handle support structure 31 consists of a central support portion 312 and side support portions 313. The central support portion 312 is used for rotatable connection with the external structure; one side support portion 313 is provided on each side of the central support portion 312, and the side support portions 313 and the central support portion 312 are fixedly connected. The two side support portions 313 have a symmetrical structure, and the handle connecting portion 311 and the side support portions 313 are fixedly connected.

[0067] The specific structural forms of the central support 312 and the side support 313 can be varied, as long as they have sufficient support strength.

[0068] Based on the above implementation scheme, this scheme proposes a specific structural form of the handle support structure 31, which is the structure shown in the attached drawings. The middle support part 312 and the side support part 313 are integrally formed rods. One end of the side support part 313 is fixedly connected to one end of the middle support part 312, and the other end extends away from the middle support part 312. The entire handle support structure 31 is approximately "U" shaped, with its open ends opening to both sides. The handle connecting part 311 is fixedly located at the end of the side support part 313 away from the middle support part 312.

[0069] This structure is relatively simple and has a low manufacturing cost, which can meet the needs of most biceps training machines.

[0070] Based on the above implementation scheme, considering that the middle support part 312 needs to be connected to the external connecting structure, and that for biceps training movements, the middle support part 312 and the external structure often adopt a rotating connection structure, the part of the middle support part 312 corresponding to the external connecting structure is set as a round rod.

[0071] As for the side support 313, there are not many restrictions on the shape of its rod. Considering the ease of processing, the handle support structure 31 can be formed by bending a whole round rod. Of course, in more complex fitness equipment applications, the side support 313 and the middle support 312 can also be designed as the required frame structure, etc.

[0072] Based on the above implementation scheme, the handle connecting part 311 is a cylindrical structure with an internal cylindrical cavity, and both its axial ends are open. The outer wall of the handle connecting part 311 and the side support part 313 are fixedly connected, which can be done by welding during processing.

[0073] The rotating assembly 32 includes a sleeve 321 and a connector 322. The sleeve 321 is a cylindrical structure that fits into the cavity of the handle connection portion 311. The connector 322 is disposed between the sleeve 321 and the grip 33, and the grip 33 is connected to the sleeve 321 via the connector 322. See also Figure 6 The connector 322 in this solution is an approximately "L"-shaped bent structure plate, with one end connected to the sleeve 321 and the other end connected to the handle 33.

[0074] For the rotating component 32 to realize the rotation of the grip 33, this solution provides the following two different implementation forms.

[0075] In form one, the socket 321 and the handle connecting part 311 are rotatably connected; the connector 322 and the socket 321 are fixedly connected. This form is also an accessory... Figure 6 The connection method shown is as follows: A copper sleeve 323 is fitted onto each of the two axial ends of the handle connection part 311, and a fitting 321 is inserted into the copper sleeve 323. A retaining ring 324 and an end cap 325 are sequentially arranged on the lower side of the lower copper sleeve 323. A through hole is reserved on the end cap, and a threaded hole is opened at the lower part of the fitting 321. A bolt 326 is inserted through the lower side of the end cap 325. The end cap 325 and the fitting 321 are connected by the bolt 326 and the fitting 321 through the threaded connection.

[0076] In this structure, there is no rotation between the socket 321 and the connector 322; in other words, the rotating assembly 32 as a whole is rotatably connected to the handle connection 311.

[0077] Form 2 differs from Form 1 in that the socket 321 and the handle connection 311 are fixedly connected, while the connector 322 and the socket 321 are rotatably connected.

[0078] The specific fixed connection form between the socket 321 and the handle connection part 311 is not limited, as long as they do not rotate relative to each other. Similarly, the connection form between the connector 322 and the socket 321 is also not limited, as long as they can rotate relative to each other.

[0079] In this way, it is equivalent to the rotating component 32 having a rotating structure inside itself, which can also realize the rotating function of the grip 33.

[0080] In both of the above forms, the specific installation angle of the grip 33 can be adjusted according to needs, such as adjusting the bending angle of the connecting piece 322. Generally speaking, considering the grip posture for biceps training, the axis of the grip 33 and the axis of the socket 321 are not parallel. Other angles can be adaptively set and adjusted according to actual needs.

[0081] Based on the above implementation scheme, the limiting component 34 includes a fixed limiting member 341 and a movable limiting member 342. The fixed limiting member 341 is fixedly connected to the handle support structure 31, and limiting portions are located on both sides of the fixed limiting member 341. The movable limiting member 342 is fixedly connected to the rotating component 32 or the grip 33, and the movable limiting member 342 can abut against the limiting portion of the fixed limiting member 341.

[0082] There are not many restrictions on the specific structural form of the fixed limiting member 341, as long as it can block the movement of the movable limiting member 342. For example, the fixed limiting member 341 can be two levers or a block, etc. Similarly, the movable limiting member 342 can also be of various structures, such as a column, a block, a sphere, etc. The fixed limiting member 341 only needs to be fixed at the position where it needs to be limited, and its specific connection with the handle support structure 31 can be welding, detachable connection, etc. As for the movable limiting member 342, it needs to be able to rotate with the handle 33, so it can be set on the rotating component 32 or the handle 33, as long as the movable limiting member 342 can abut against the fixed limiting member 341 after the handle 33 rotates to the position where it needs to be limited.

[0083] Based on the above implementation scheme, this scheme provides a specific structural form for the fixed limiting member 341 and the movable limiting member 342. For example... Figure 6 As shown, the fixed limiting member 341 is a fan-shaped plate with two notches on both sides serving as limiting parts. The fixed limiting member 341 is fixedly installed on the outside of the handle connecting part 311. The movable limiting member 342 is a columnar structure fixedly installed on the connecting member 322, that is... Figure 6 The lower side of connector 322 in the direction.

[0084] This solution also proposes a fitness device that utilizes the aforementioned bidirectional limiting rotating handle 3, primarily for biceps training exercises. See [link to relevant documentation]. Figure 7 and Figure 8 This fitness equipment includes a base 1, which adopts a frame-type support structure to ensure stable placement on the ground. A swing frame 2 is rotatably connected to the base 1, and the aforementioned bidirectional limiting rotating handle 3 is provided on one side of the swing frame 2. In addition, the swing frame 2 and the counterweight assembly 4 are linked together.

[0085] When exercising, the user holds the handle 33 of the bidirectional limiting rotating handle 3, and then drives the swing frame 2 to swing back and forth through the handle 33. During the swing, the counterweight component 4 gives the swing frame 2 a load, which improves the exercise effect.

[0086] Based on the above implementation scheme, and considering the fitness movements of biceps training, a seat cushion 11 and an elbow pad 12 are fixedly installed on the base 11; the elbow pad 12 is located on the upper side of the seat cushion 11, and the elbow pad 12 itself is an inclined pad. The swing frame 2 includes a main frame 21 with an overall "U" shape, and the elbow pad 12 is located in the opening area of ​​the main frame 21; a two-way limiting rotating handle 3 is set on the side of the main frame 21 away from the elbow pad 12.

[0087] With this structure, users can perform biceps training in a seated position, placing their elbows on the elbow pads 12 and then gripping the handles 33 to move.

[0088] Based on the above implementation scheme, the swing frame 2 also includes a sub-frame 22, see [link / reference]. Figure 5 The sub-frame 22 is located in the middle of the side of the main frame 21 away from the elbow pad 12; the upper edge of the sub-frame 22 is hinged to the main frame 21. A through hole is opened in the middle of the sub-frame 22, and the middle support part 312 of the bidirectional limiting rotating handle 3 is inserted into the through hole and rotatably connected to the sub-frame 22.

[0089] This structure adds a rotatable subframe 22 between the bidirectional limiting rotary handle 3 and the main frame 21, allowing users to feel more natural when performing bicep exercises, without feeling a forced or restricted movement posture due to the linkage of the mechanical structure.

[0090] Based on the above implementation scheme, the counterweight component 4 can also take different forms, such as setting a hanging rod on the main frame 22, and changing the counterweight by hanging barbell plates on the hanging rod. It can also be as described in this application. Figure 7 and Figure 8 The diagram shows the addition of a dedicated counterweight box, within which a vertically sliding counterweight assembly is installed. This assembly is then linked to the main frame 21 via pulleys and cables, causing the main frame 21 to swing upwards, which in turn lifts the counterweight assembly within the counterweight box. The connection method for the counterweight assembly can utilize existing technology; this is not a key aspect of this solution and will not be elaborated upon here.

[0091] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0092] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0093] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0094] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0095] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0096] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A bidirectional limiting rotary handle, characterized in that, include: The handle support structure is a frame structure with symmetrical sides. The handle support structure includes handle connecting parts symmetrically arranged on both sides. There are two rotating components, each connected to the handle support structure via the handle connector on one side; A grip is provided on at least one of the rotating components; the grip is rotatably connected via the rotating components and the handle support structure. A limiting component is provided at the connection between the rotating component and the handle support structure; the limiting component includes two limiting parts, which limit the rotation of the rotating component in rotation direction one and rotation direction two, respectively, and the rotation direction one and rotation direction two are opposite to each other; the rotation angle of the rotating component between the two limiting parts is less than 360°.

2. The bidirectional limiting rotary handle as described in claim 1, characterized in that, The handle support structure also includes: The central support section can be rotatably connected to the external structure; A side support is provided on each side of the central support, and the side support and the central support are fixedly connected. The handle connector and the side support are fixedly connected.

3. The bidirectional limiting rotary handle as described in claim 2, characterized in that, Both the central support and the side support are rods; One end of the side support is fixedly connected to one end of the middle support, and the other end extends away from the middle support. The handle connection is fixedly located at the end of the side support that is away from the middle support.

4. The bidirectional limiting rotary handle as described in claim 3, characterized in that, The portion of the central support corresponding to the external connection structure is a round rod.

5. The bidirectional limiting rotary handle as described in claim 4, characterized in that, The handle connection part is a cylindrical structure with a cylindrical cavity inside; the outer wall of the handle connection part and the side support part are fixedly connected. The rotating assembly includes: A socket fitting is fitted into the cavity of the handle connection portion; A connector is disposed between the socket and the grip, and the grip is connected to the socket via the connector.

6. The bidirectional limiting rotary handle as described in claim 5, characterized in that, The socket and the handle are rotatably connected; The connector and the socket are fixedly connected.

7. The bidirectional limiting rotary handle as described in claim 5, characterized in that, The socket and the handle connection are fixedly connected; The connector and the sleeve are rotatably connected.

8. The bidirectional limiting rotary handle as described in claim 6 or 7, characterized in that, The limiting component includes: A fixed limiting component is fixedly connected to the handle support structure, and the limiting part is disposed on both sides of the fixed limiting component; The movable limiting member is fixedly connected to the rotating component or the handle, and the movable limiting member can abut against the limiting part of the fixed limiting member.

9. The bidirectional limiting rotary handle as described in claim 8, characterized in that, The fixed limiting member is a plate, and the limiting part is two recessed structures opened on both sides of the fixed limiting member; The movable limiting component is a column structure fixedly mounted on the connector.

10. A fitness device, characterized in that, Use the bidirectional limiting rotary handle as described in any one of claims 1-9.

11. The fitness device as described in claim 10, characterized in that, include: The base is a frame that can be placed on the ground; The swing frame is rotatably connected to the base, and the bidirectional limiting rotation handle is provided on one side of the swing frame; The counterweight assembly, linked to the swing frame, can increase the load on the swing frame during movement.

12. The fitness device as described in claim 11, characterized in that, A seat cushion and an elbow pad are fixedly installed on the base; The swing frame includes: The main frame is a "U"-shaped frame, and the elbow pad is located in the opening area of ​​the main frame; The bidirectional limiting rotary handle is located on the side of the main frame away from the elbow pad.

13. The fitness device as described in claim 12, characterized in that, The swing frame also includes: The sub-frame is located in the middle of the side of the main frame away from the elbow pad; one edge of the sub-frame is hinged to the main frame; The central support and the subframe of the bidirectional limiting rotary handle are rotatably connected.

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