Elbow joint rehabilitation training device
By designing an adjustable component for the elbow joint rehabilitation training device, the problem that static traction braces cannot adapt to the needs of different patients was solved, achieving precise adjustment of the elbow joint and efficient rehabilitation training.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING JISHUITAN HOSPITAL
- Filing Date
- 2025-03-31
- Publication Date
- 2026-06-26
AI Technical Summary
Existing static traction braces cannot adaptively adjust the opening and closing angles of hyperextension or flexion and the magnitude of traction force according to the specific needs of different patients or injuries, resulting in poor rehabilitation training effects and low efficiency.
An elbow joint rehabilitation training device was designed, including a support base, an upper arm bracket, a forearm bracket, a first adjustment component, and a second adjustment component. The first adjustment component drives the upper arm bracket or the forearm bracket to deflect relative to the support base, and the second adjustment component drives the upper arm bracket and the forearm bracket to move closer to or further away from each other, thereby achieving precise adjustment of the elbow joint extension force.
It enables precise adjustment of the patient's elbow joint, improves the pertinence and effectiveness of rehabilitation treatment, reduces patient pain, and enhances the user experience and efficiency of rehabilitation training.
Smart Images
Figure CN224403838U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to an elbow joint rehabilitation training device. Background Technology
[0002] One of the most common and challenging complications following elbow injury is traumatic elbow stiffness. This complication has a high incidence rate, reaching up to 20%, making it one of the most prone joints to stiffness throughout the body. Once elbow stiffness occurs, it not only causes significant inconvenience in daily life but also severely impacts a patient's quality of life.
[0003] While surgical release is one treatment option for elbow stiffness, its postoperative outcomes are not ideal. Patients often face the risk of recurrence of stiffness after surgery, with a rate of approximately 20%-26%. Furthermore, surgery can lead to a range of complications, including nerve damage, elbow instability, and subcutaneous effusion at the incision site, all of which pose significant challenges to the patient's recovery.
[0004] Therefore, in the treatment of elbow stiffness, manual rehabilitation therapy combined with traction braces has gradually become a preferred approach to improve the condition. However, the static traction braces widely used in current technology have revealed some design flaws in actual clinical applications. These flaws are mainly reflected in the fact that during static rehabilitation training, the brace cannot adaptively adjust the opening and closing angles of hyperextension or flexion, as well as the magnitude of traction force, according to the specific needs of different patients or injuries.
[0005] Due to this lack of flexibility and personalization in their design, static traction braces often fail to provide patients with the most precise and effective rehabilitation training. This not only leads to poor treatment outcomes but also significantly reduces the efficiency of rehabilitation training. Utility Model Content
[0006] In view of this, the purpose of this utility model is to overcome the shortcomings of related technologies, and this utility model provides an elbow joint rehabilitation training device.
[0007] This utility model provides the following technical solution:
[0008] An elbow joint rehabilitation training device includes a support base, an upper arm bracket, a forearm bracket, a first adjustment component, and a second adjustment component.
[0009] The upper arm support is mounted on the support base to provide support for the patient's upper arm; the forearm support is mounted on the support base to provide support for the patient's forearm; the first adjustment component is mounted on the support base and is convexly connected to the upper arm support and the forearm support respectively, to drive the upper arm support or the forearm support to deflect relative to the support base; the second adjustment component is mounted on the support base and is convexly connected to the upper arm support and the forearm support respectively, to drive the upper arm support and the forearm support to move closer to or further away from each other.
[0010] As a further improvement to the above technical solution, the first adjustment component includes a lifting member, a lifting screw, and two transmission rods corresponding to the boom bracket or the forearm bracket. The lifting screw is rotatably and vertically mounted on the support base. The lifting member has a lifting slider. The support base is provided with a lifting groove corresponding to the lifting slider. The lifting slider passes through the lifting groove and is threaded onto the lifting screw. The two opposite ends of the lifting member are respectively hinged to the two transmission rods. The ends of the two transmission rods away from the lifting member are respectively hinged to the corresponding boom bracket or forearm bracket. The second adjustment component includes a sliding seat. The sliding seat is correspondingly arranged with the boom bracket or forearm bracket. The second adjustment component can drive the sliding seat to slide relative to the support base. The two sliding seats are respectively hinged to the corresponding boom bracket or forearm bracket.
[0011] As a further improvement to the above technical solution, the first adjusting component further includes a worm gear, which is mounted on the support base. The lifting screw is provided with a worm portion corresponding to the worm gear, and the worm portion meshes with the worm gear.
[0012] As a further improvement to the above technical solution, the worm gear is externally connected to a rotating disk.
[0013] As a further improvement to the above technical solution, the ends of the boom bracket or the forearm bracket opposite to the support surface are respectively provided with a first adjusting seat and a second adjusting seat. The first adjusting seat is installed and connected to the boom bracket or the forearm bracket. The second adjusting seat is provided with a sliding rail. The first adjusting seat and the sliding rail on the second adjusting seat are slidably engaged. The first adjusting seat is provided with a locking member, which is used to limit the relative position of the first adjusting seat and the second adjusting seat. The second adjusting seat is hinged to the corresponding transmission rod and the sliding seat respectively.
[0014] As a further improvement to the above technical solution, the boom bracket or the forearm bracket is connected to the corresponding first adjusting seat by a single bolt, so that the boom bracket or the forearm bracket can deflect relative to the corresponding first adjusting seat.
[0015] As a further improvement to the above technical solution, the second adjustment component also includes an adjustment screw, which is rotatably and horizontally mounted on the support base, and the sliding seat is fitted onto the adjustment screw by means of a threaded engagement.
[0016] As a further improvement to the above technical solution, the support surfaces of both the boom bracket and the forearm bracket are covered with a buffer layer.
[0017] As a further improvement to the above technical solution, the support length of the upper arm bracket is L1, and the support length of the lower arm bracket is L2. The values of L1 and L2 are in the range of L1 < L2.
[0018] As a further improvement to the above technical solution, both the boom bracket and the forearm bracket are provided with multiple ventilation holes.
[0019] Compared with related technologies, the beneficial effects of this utility model are:
[0020] The elbow joint rehabilitation training device provided by this utility model allows the therapist or patient to adjust the upper arm support and forearm support by means of the first adjustment component when the patient needs to perform static elbow joint rehabilitation training. The angle between the two supports is adjusted to the most suitable angle for the current training needs.
[0021] Subsequently, using the second adjustment component, the relative positions of the upper arm support and forearm support to the support base are fine-tuned, further precisely controlling the distance between the upper arm support and forearm support, thereby achieving precise adjustment of the traction force on the patient's elbow joint. Furthermore, this adjustment function is particularly important in static rehabilitation training, as it helps therapists gradually adjust the training intensity according to the patient's specific condition, effectively reducing the patient's pain.
[0022] This adjustment process not only facilitates targeted adaptation for patients, improving the pertinence and effectiveness of rehabilitation treatment, but also greatly enhances the patient's user experience. During training, patients simply place their upper arm and forearm on the upper arm support and forearm support respectively to enjoy stable and appropriate static progressive stretching provided by the device, which helps accelerate the elbow joint rehabilitation process and brings patients a more comfortable and efficient rehabilitation training experience.
[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the elbow joint rehabilitation training device from one perspective in one embodiment of the present invention;
[0026] Figure 2 It shows Figure 1 A schematic diagram of the structure at point A in the middle;
[0027] Figure 3 This diagram shows another perspective view of the elbow joint rehabilitation training device in one embodiment of the present invention.
[0028] Explanation of key component symbols:
[0029] 100-Support seat; 110-Lifting groove; 200-Up boom bracket; 300-Forearm bracket; 310-First adjusting seat; 320-Second adjusting seat; 321-Sliding rail; 322-Locking component; 330-Bolt; 400-First adjusting assembly; 410-Lifting component; 411-Lifting slider; 420-Lifting screw; 430-Transmission rod; 440-Rotating disc; 500-Second adjusting assembly; 510-Sliding seat; 520-Adjusting screw. Detailed Implementation
[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.
[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," 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 or an electrical 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 utility model according to the specific circumstances.
[0034] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0035] like Figure 1 As shown, an embodiment of this utility model provides an elbow joint rehabilitation training device, including a support base 100, an upper arm support 200, a forearm support 300, a first adjustment component 400, and a second adjustment component 500.
[0036] The upper arm support 200 is mounted on the support base 100 to provide support for the patient's upper arm; the forearm support 300 is mounted on the support base 100 to provide support for the patient's forearm; the first adjustment component 400 is mounted on the support base 100 and is convexly connected to the upper arm support 200 and the forearm support 300 respectively, to drive the upper arm support 200 or the forearm support 300 to deflect relative to the support base 100; the second adjustment component 500 is mounted on the support base 100 and is convexly connected to the upper arm support 200 and the forearm support 300 respectively, to drive the upper arm support 200 and the forearm support 300 to move closer to or further away from each other.
[0037] The elbow joint rehabilitation training device provided in this embodiment allows the therapist or patient to adjust the upper arm support 200 and the forearm support 300 by using the first adjustment component 400 when the patient needs to perform static elbow joint rehabilitation training. The angle between the two components is adjusted to the angle most suitable for the current training needs.
[0038] Subsequently, using the second adjustment component 500, the relative positions of the upper arm support 200 and forearm support 300 with the support base 100 are fine-tuned, further controlling the distance between the upper arm support 200 and forearm support 300, thereby achieving precise adjustment of the patient's elbow joint extension force. Furthermore, this adjustment function is particularly important in static rehabilitation training, as it helps therapists gradually adjust the training intensity according to the patient's specific condition, effectively reducing the patient's pain.
[0039] This adjustment process not only facilitates targeted adaptation for patients, improving the pertinence and effectiveness of rehabilitation treatment, but also greatly enhances the patient's user experience. During training, patients simply place their upper arm and forearm on the upper arm support 200 and forearm support 300 respectively to perform stable and appropriate static progressive stretching provided by the device, which helps accelerate the elbow joint rehabilitation process and brings patients a more comfortable and efficient rehabilitation training experience.
[0040] In some specific embodiments, the first adjustment component 400 includes a lifting member 410, a lifting screw 420, and two transmission rods 430 corresponding to the boom bracket 200 or the forearm bracket 300. The lifting screw 420 is rotatably and vertically mounted on the support base 100. The lifting member 410 has a lifting slider 411. The support base 100 is provided with a lifting groove 110 corresponding to the lifting slider 411. The lifting slider 411 passes through the lifting groove 110 and is threaded onto the lifting screw 420. This design allows the lifting slider 411 to move up and down along the lifting groove 110 by rotating the lifting screw 420. The two opposite ends of the lifting member 410 are respectively hinged to the two transmission rods 430, and the ends of the two transmission rods 430 away from the lifting member 410 are respectively hinged to the corresponding boom bracket 200 or forearm bracket 300.
[0041] The second adjustment component 500 includes a sliding seat 510, which is correspondingly disposed with the boom bracket 200 or the forearm bracket 300. The second adjustment component 500 can drive the sliding seat 510 to slide relative to the support base 100. The two sliding seats 510 are respectively hinged to the corresponding boom bracket 200 or forearm bracket 300.
[0042] In operation, simply rotating the lifting screw 420 easily moves the lifting slider 411 along the lifting groove 110. This movement is further transmitted through the transmission rod 430, driving the upper arm bracket 200 or the forearm bracket 300 to deflect relative to the sliding seat 510, thereby enabling precise adjustment of the angle between the upper arm bracket 200 and the forearm bracket 300. It is worth noting that this design offers a wider adjustable angle range compared to traditional elbow joint training braces, greatly expanding the equipment's application range and applicability.
[0043] Furthermore, through the action of the second adjustment component 500, the sliding seat 510 can slide smoothly on the support seat 100, which causes a change in the distance between the closest points of the upper arm support 200 and the forearm support 300. This change can further adjust the magnitude of the stretching force provided by this embodiment, making the entire rehabilitation training process more flexible and personalized.
[0044] In some specific embodiments, the first adjusting component 400 further includes a worm gear mounted on the support base 100. The lifting screw 420 has a worm portion corresponding to the worm gear, and the worm portion meshes with the worm gear. In actual operation, the user only needs to rotate the worm gear to drive the lifting screw 420 to rotate through the meshing action of the worm portion and the worm gear. This design not only greatly saves the effort required for operation but also significantly improves the efficiency of operation, making the entire adjustment process more labor-saving and efficient.
[0045] Furthermore, this meshing mechanism between the worm gear and the worm shaft offers another significant advantage: it effectively prevents the lifting screw 420 from rotating unexpectedly under external force. This self-locking characteristic further enhances the stability and safety of the first adjustment assembly 400, making the entire elbow joint rehabilitation training device more reliable and trustworthy during use.
[0046] In some specific embodiments, the worm gear is externally connected to a rotating disk 440, which further facilitates the user to hold the rotating disk 440 to adjust the rotation of the worm gear.
[0047] In some specific embodiments, the ends of the upper arm support 200 or the forearm support 300 opposite to the support surface are respectively provided with a first adjusting seat 310 and a second adjusting seat 320. The first adjusting seat 310 is installed and connected to the upper arm support 200 or the forearm support 300. The second adjusting seat 320 is provided with a sliding track 321. The first adjusting seat 310 and the sliding track 321 on the second adjusting seat 320 are slidably engaged. The first adjusting seat 310 is provided with a locking member 322, which is used to restrict the relative position of the first adjusting seat 310 and the second adjusting seat 320. The second adjusting seat 320 is hinged to the corresponding transmission rod 430 and the sliding seat 510 respectively. In actual use, the therapist can first release the restriction of the relative position of the first adjusting seat 310 and the second adjusting seat 322 by the locking member 322, and then drive the first adjusting seat 310 to slide along the sliding track 321 on the second adjusting seat 320. This sliding adjustment method allows for flexible adjustment of the support position provided by the upper arm support 200 or forearm support 300 according to the different arm lengths of different patients. This personalized adjustment method not only improves the adaptability and practicality of the device, but also ensures that the upper arm support 200 or forearm support 300 can always provide stable and reliable support for the patient's arm, regardless of the patient's arm length. This greatly improves the reliability of use and patient comfort in this embodiment.
[0048] In some specific embodiments, the upper arm support 200 or the forearm support 300 is connected to the corresponding first adjustment seat 310 by a single bolt 330, so that the upper arm support 200 or the forearm support 300 can deflect relative to the corresponding first adjustment seat 310. This connection method allows the upper arm support 200 or the forearm support 300 to deflect relative to the first adjustment seat 310 within a certain range, thereby enabling a more precise fit to the natural shape and dynamic changes of the patient's arm.
[0049] Specifically, as the patient's elbow gradually extends from a flexed position, the forearm undergoes a complete supination process. During this process, a specific angle is formed between the forearm and upper arm, known as the eversion angle. This angle is an outward-opening angle formed by the intersection of the extensions of the forearm axis and the upper arm axis (or arm axis), ranging from approximately 165° to 170°. Correspondingly, the supplementary angle, the angle formed by the intersection of the extensions of the two arm axes at the medial side, is approximately 10° to 15°, and this angle is clinically referred to as the carrying angle.
[0050] It is worth noting that the lifting angle may vary among patients, depending on their individual differences, lifestyle habits, and potential pathological conditions. Therefore, to ensure that elbow joint rehabilitation training devices can adapt to these individual differences, such as... Figure 3 As shown, our designed upper arm support 200 and forearm support 300 can deflect relative to the first adjustment seat 310 according to the change in the patient's forearm carrying angle. This deflection is dynamic and can be adjusted with the natural movement of the patient's arm, thereby ensuring that the upper arm support 200 and forearm support 300 can always maintain a full fit with the patient's arm.
[0051] This design not only improves patient comfort during rehabilitation training but also enhances training effectiveness. Because the upper arm support 200 and forearm support 300 fit snugly against the patient's arm, they provide better support and protection for the elbow joint, reducing unnecessary pressure and friction. Simultaneously, this fit helps guide the patient's arm into correct movements, thereby accelerating the elbow joint's rehabilitation process.
[0052] like Figure 2 As shown, in some specific embodiments, the second adjustment component 500 further includes an adjustment screw 520, which is rotatably and horizontally mounted on the support base 100. The sliding seat 510 is threaded onto the adjustment screw 520. By rotating the adjustment screw 520, the sliding seat 510 can be driven to move relative to the support base 100, making the operation convenient and quick.
[0053] In some specific embodiments, the support surfaces of the upper arm support 200 and the forearm support 300 are covered with a buffer layer to avoid bumping or hitting the patient's arm and to improve the safety of use in this embodiment.
[0054] In some specific embodiments, the support length of the upper arm support 200 is L1, and the support length of the forearm support 300 is L2, with L1 < L2. By setting the support length of the upper arm support 200 to be less than that of the forearm support 300, on the one hand, the forearm support 300 can provide sufficient support for the patient's forearm and wrist, and on the other hand, it can avoid the upper arm support 200 from putting pressure on the patient's armpit, thus improving the patient's comfort. Furthermore, it allows the patient to quickly find a more accurate direction of use, improving efficiency.
[0055] In some specific embodiments, both the upper arm support 200 and the forearm support 300 are provided with multiple ventilation holes. During actual use, these ventilation holes not only effectively reduce friction and heat buildup between the arm and the support, but also provide patients with a more comfortable and refreshing experience. This design not only improves the practicality of the device but also enhances patient satisfaction and comfort.
[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. An elbow joint rehabilitation training device, characterized in that, include: Support base (100); An upper arm support (200) is provided on the support base (100) to provide support for the patient's upper arm; A forearm support (300) is provided on the support base (100) for providing support for the patient's forearm; The first adjustment component (400) is installed on the support base (100). The first adjustment component (400) is connected to the boom bracket (200) and the forearm bracket (300) respectively, so as to drive the boom bracket (200) or the forearm bracket (300) to deflect and adjust relative to the support base (100). The second adjustment component (500) is installed on the support base (100). The second adjustment component (500) is connected to the boom bracket (200) and the forearm bracket (300) respectively, so as to drive the boom bracket (200) and the forearm bracket (300) to move closer or further apart.
2. The elbow joint rehabilitation training device according to claim 1, characterized in that, The first adjustment component (400) includes a lifting member (410), a lifting screw (420), and two transmission rods (430) corresponding to the boom bracket (200) or the forearm bracket (300). The lifting screw (420) is rotatably and vertically mounted on the support base (100). The lifting member (410) has a lifting slider (411). The support base (100) is provided with a lifting groove (110) corresponding to the lifting slider (411). The lifting slider (411) passes through the lifting groove (110) and is threaded onto the lifting screw (420). The two opposite ends of the lifting member (410) are respectively hinged to the two transmission rods (430). The ends of the two transmission rods (430) away from the lifting member (410) are respectively hinged to the corresponding boom bracket (200) or the forearm bracket (300). The second adjustment component (500) includes a sliding seat (510), which is correspondingly disposed with the boom bracket (200) or the forearm bracket (300). The second adjustment component (500) can drive the sliding seat (510) to slide relative to the support base (100). The two sliding seats (510) are respectively hinged to the corresponding boom bracket (200) or forearm bracket (300).
3. The elbow joint rehabilitation training device according to claim 2, characterized in that, The first adjusting component (400) further includes a worm gear, which is mounted on the support base (100). The lifting screw (420) is provided with a worm portion corresponding to the worm gear, and the worm portion meshes with the worm gear.
4. The elbow joint rehabilitation training device according to claim 3, characterized in that, The worm gear is externally connected to a rotating disk (440).
5. The elbow joint rehabilitation training device according to claim 2, characterized in that, The upper arm bracket (200) or the lower arm bracket (300) is provided with a first adjusting seat (310) and a second adjusting seat (320) at the ends away from the support surface. The first adjusting seat (310) is installed and connected to the upper arm bracket (200) or the lower arm bracket (300). The second adjusting seat (320) is provided with a sliding rail (321). The first adjusting seat (310) and the sliding rail (321) on the second adjusting seat (320) are slidably engaged. The first adjusting seat (310) is provided with a locking member (322) to restrict the relative position of the first adjusting seat (310) and the second adjusting seat (320). The second adjusting seat (320) is hinged to the corresponding transmission rod (430) and the sliding seat (510).
6. The elbow joint rehabilitation training device according to claim 5, characterized in that, The boom bracket (200) or the forearm bracket (300) is connected to the corresponding first adjustment seat (310) by a single bolt (330) so that the boom bracket (200) or the forearm bracket (300) can deflect relative to the corresponding first adjustment seat (310).
7. The elbow joint rehabilitation training device according to claim 2, characterized in that, The second adjustment assembly (500) further includes an adjustment screw (520), which is rotatably and horizontally mounted on the support base (100), and the sliding seat (510) is threaded onto the adjustment screw (520).
8. The elbow joint rehabilitation training device according to any one of claims 1 to 7, characterized in that, Both the support surfaces of the boom bracket (200) and the forearm bracket (300) are covered with a buffer layer.
9. The elbow joint rehabilitation training device according to any one of claims 1 to 7, characterized in that, The support length of the upper arm bracket (200) is L1, and the support length of the lower arm bracket (300) is L2. The values of L1 and L2 are in the range of L1 < L2.
10. The elbow joint rehabilitation training device according to any one of claims 1 to 7, characterized in that, Both the boom bracket (200) and the forearm bracket (300) are provided with multiple ventilation holes.