Arm sling device with angle-adjustable elbow joint for hip operation

Abstract

The utility model provides an elbow joint angle-adjustable arm sling device for hip surgery. The elbow joint angle-adjustable arm sling device comprises a front arm sleeve, an upper arm sleeve and an angle adjusting assembly. The forearm sleeve is used for fixing the forearm of a user; the upper arm oversleeve is used for fixing the upper arm of a user, and the included angle between the upper arm oversleeve and the forearm oversleeve is a first preset included angle alpha; the angle adjusting assembly is connected with the forearm oversleeve and the upper arm oversleeve, and the first preset included angle alpha between the forearm oversleeve and the upper arm oversleeve can be adjusted through the angle adjusting assembly. The angle adjusting assembly is connected with the forearm oversleeve and the upper arm oversleeve, so that a doctor can easily adjust the first preset included angle alpha between the forearm oversleeve and the upper arm oversleeve according to operation requirements, the flexibility of an operation is improved, and the comfort level of a patient is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical auxiliary instruments, in particular to an arm sling device with an adjustable angle of an elbow joint used in hip surgery. Background Art

[0002] In medical practice, whether using a traction bed or robot-assisted surgery for pelvic fractures, it involves the step of suspending one of the patient's arms on a head frame. The main purpose of this operation is to ensure the stability of the arm during surgery and avoid unnecessary movement that interferes with the operation. However, there are some inherent problems with the traditional arm suspension cuff design.

[0003] Traditional arm suspension sleeves cannot be individually adjusted to fix the flexion position of the joint. Since each patient's arm length, range of motion, and surgical needs are different, this design that lacks individual adjustment capabilities often cannot meet the needs of all patients. This may lead to an unstable arm position during surgery and may even affect the effectiveness of the surgery.

[0004] The application of traditional arm suspension cuffs in pelvic fracture closed resection surgery has certain limitations and needs to be improved and optimized. Utility Model Content

[0005] In view of this, the purpose of the utility model is to overcome the deficiencies in the prior art and to provide an arm sling device with an adjustable angle of the elbow joint for hip surgery.

[0006] The utility model provides the following technical solutions:

[0007] The embodiment of the present application provides an arm sling device with an adjustable angle of the elbow joint for hip surgery, comprising a forearm cuff, an upper arm cuff and an angle adjustment assembly. The forearm cuff is used to fix the user's forearm; the upper arm cuff is used to fix the user's upper arm, and the angle between the upper arm cuff and the forearm cuff is a first preset angle α; the angle adjustment assembly is respectively connected to the forearm cuff and the upper arm cuff, and the size of the first preset angle α between the forearm cuff and the upper arm cuff can be adjusted by the angle adjustment assembly.

[0008] In one embodiment, an arm sling device with an adjustable elbow angle for hip surgery further includes a bracket, wherein the bracket includes a first rod and a second rod, one end of the second rod is fixedly arranged, the other end of the second rod is fixedly connected to one end of the first rod, and the angle between the first rod and the second rod is a second preset angle β; the upper arm cuff is installed on the second rod, and the forearm cuff is connected to the first rod.

[0009] In one embodiment, 85°≤β≤95°.

[0010] In another embodiment, 175°≤β≤180°.

[0011] In one embodiment, the arm sling device with adjustable elbow angle for hip surgery further comprises a first connecting strap and a second connecting strap. The forearm cuff is connected to the first rod through the first connecting strap; the upper arm cuff is connected to the second rod through the second connecting strap.

[0012] In one embodiment, the first connecting strip and the second connecting strip are made of a flexible material.

[0013] In one embodiment, the angle adjustment assembly includes a mounting seat, a first plate body, a second plate body and a third meshing gear. The two ends of the first plate body are respectively a first mounting end and a first adjusting end, the first mounting end is provided with the forearm cuff, the first adjusting end is fixedly provided with a first meshing gear, and the first meshing gear is rotatably mounted on the mounting seat; the two ends of the second plate body are respectively a second mounting end and a second adjusting end, the second mounting end is provided with the upper arm cuff, the second adjusting end is fixedly provided with a second meshing gear, and the second meshing gear is rotatably mounted on the mounting seat; the third meshing gear is slidably mounted on the mounting seat along the axial direction of the third meshing gear and the third meshing gear is stationary relative to the mounting seat in the rotation direction, the third meshing gear has a meshing position and an unlocking position on the mounting seat, the third meshing gear slides along the axial direction to switch to different meshing positions, in the meshing position, the third meshing gear simultaneously meshes with the first meshing gear and the second meshing gear, so that the first meshing gear and the second meshing gear are stationary relative to the mounting seat in the rotation direction, and in the unlocking position, the third meshing gear is disengaged from the first meshing gear and the second meshing gear.

[0014] In one embodiment, the angle adjustment assembly further includes a connecting block and a pressing block. The connecting block is fixedly connected to the third meshing gear, a sliding channel is provided on the mounting seat along the axial direction of the third meshing gear, the connecting block and the sliding channel are slidably matched, and the cross-sections of the connecting block and the sliding channel along the radial direction of the third meshing gear are polygonal, so that the connecting block is stationary relative to the mounting seat and the sliding channel in the rotation direction; the pressing block is fixedly connected to the connecting block, and the pressing block is located outside the mounting seat, and the connecting block and the third meshing gear are driven to move axially by pushing the pressing block.

[0015] In one embodiment, the arm sling device with adjustable elbow angle for hip surgery also includes an elastic member, which can be retracted and rebounded, and the elastic member connects the mounting seat and the third meshing gear. The elastic member can apply a force to the third meshing gear to make the third meshing gear approach the meshing position or have a tendency to approach the meshing position.

[0016] In one embodiment, the forearm cuff includes a first shell and a second shell, the second shell is buckled on the first shell, the first shell is fixedly connected to the first plate, and flexible liners are provided in the first shell and the second shell.

[0017] In one embodiment, the upper arm cuff includes a first shell and a second shell, the first shell is fixedly connected to the second plate, the second shell is buckled on the first shell, and flexible liners are provided in the first shell and the second shell.

[0018] The embodiments of the present utility model have the following advantages:

[0019] The angle adjustment component is respectively connected to the forearm cuff and the upper arm cuff, so that the doctor can easily adjust the size of the first preset angle α between the forearm cuff and the upper arm cuff according to the needs of the operation, which not only increases the flexibility of the operation, but also further improves the comfort of the patient.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A structural schematic diagram showing one embodiment of an arm sling device with adjustable elbow angle for hip surgery provided by an embodiment of the present application from one perspective;

[0023] Figure 2 Shows Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 A schematic structural diagram from two perspectives of another embodiment of an arm sling device with adjustable elbow angle for hip surgery provided by an embodiment of the present application is shown;

[0025] Figure 4 A three-view structural schematic diagram of another embodiment of an arm sling device with adjustable elbow angle for hip surgery provided by an embodiment of the present application is shown.

[0026] Description of main component symbols:

[0027] 100-forearm cuff;

[0028] 200-upper arm cuff;

[0029] 300-angle adjustment assembly; 310-mounting seat; 320-first plate; 330-second plate; 340-first meshing gear; 350-second meshing gear; 360-third meshing gear; 370-pressing block; 380-connecting block;

[0030] 400- bracket; 410- first rod body; 420- second rod body;

[0031] 500-first connecting belt; 550-second connecting belt. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the template herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] An embodiment of the present application provides an arm sling device with an adjustable elbow angle for hip surgery; during surgery, especially hip surgery, the device can provide personalized arm flexion angles for different patients, can adapt to different surgical situations, provides great convenience for doctors, and also brings a more comfortable and safe experience to patients.

[0038] like Figure 1 As shown, the arm sling device with adjustable elbow angle for hip surgery comprises a forearm cuff 100 , an upper arm cuff 200 and an angle adjustment component 300 .

[0039] The forearm sleeve 100 is used to fix the user's forearm. The part of the forearm sleeve 100 that contacts the patient's arm is made of soft and elastic material to ensure that while fixing the user's forearm, it does not bring too much pressure to the forearm, improves the comfort of use, and avoids pressure sores.

[0040] The upper arm cuff 200 is used to fix the user's upper arm; the portion of the upper arm cuff 200 that contacts the patient's arm is also made of soft and elastic material to ensure that when fixing the user's upper arm, no unnecessary restraint is caused to the upper arm.

[0041] like Figure 1 As shown, the angle between the upper arm cuff 200 and the forearm cuff 100 is a first preset angle α. The size of the first preset angle α is designed according to ergonomics and surgical requirements, and is intended to ensure the stability and comfort of the arm during surgery. Exemplarily, the first preset angle α = 85° to 95°; Exemplarily, the first preset angle α = 90°. In another embodiment, the first preset angle α = 85°. In another embodiment, the first preset angle α = 95°. The range size of the above first preset range α is for example only and does not represent a limitation on α.

[0042] like Figure 1 As shown, the angle adjustment component 300 is respectively connected to the forearm cuff 100 and the upper arm cuff 200, so that the doctor can use the angle adjustment component 300 to adjust the angle between the forearm cuff 100 and the upper arm cuff 200, that is, the size of the first preset angle α, according to the needs of the operation, which not only increases the flexibility of the operation, but also further improves the comfort of the patient.

[0043] It is understandable that the doctor can also install the forearm cuff 100, the upper arm cuff 200 and the angle adjustment assembly 300 to a fixed position by using cable ties, ropes, rubber bands, etc. The fixed position is the head of the operating bed, the side of the operating bed or other places away from the operating position of the patient's body.

[0044] The embodiment of the present application provides an arm sling device with an adjustable elbow angle for hip surgery, which can adjust the size of the first preset angle α between the forearm cuff 100 and the upper arm cuff 200 through the angle adjustment component 300, providing great convenience for the doctor to adjust the flexion degree of the patient's arm and fix the patient's arm, which can not only ensure the smooth progress of the surgical process, but also improve the patient's comfort, avoid pressure sores, and reduce discomfort and pain during the operation.

[0045] like Figure 3 or Figure 4 As shown, in one embodiment, the arm sling device with adjustable elbow angle for hip surgery also includes a bracket 400, which is used to provide a mounting base for the forearm cuff 100 and the upper arm cuff 200, so that the patient's arm is raised and away from the surgical side of the body to prevent the patient's arm from interfering with the execution of the surgery.

[0046] The bracket 400 includes a first rod body 410 and a second rod body 420, one end of the second rod body 420 is fixedly set on an operating table or other area that can provide a fixed installation position, and the other end of the second rod body 420 is fixedly connected to one end of the first rod body 410, and the angle between the first rod body 410 and the second rod body 420 is a second preset angle β.

[0047] The upper arm cuff 200 is mounted on the second rod 420 , and the forearm cuff 100 is connected to the first rod 410 .

[0048] In one embodiment, 85°≤the second preset angle β≤95°, and the support 400 can fix the patient's arm in front of the chest, so that the patient's arm remains in front of the chest and does not interfere with the operation on the hip or the like. For example, the second preset angle β=85°. Figure 3 As shown, in another embodiment, the second preset angle β=90°. In another embodiment, the second preset angle β=95°.

[0049] Of course, the angle between the first rod 410 and the second rod 420 is the second preset angle β, and other angles can also be set. In another embodiment, 175°≤β≤180°, then the support 400 can make the patient's arm straighten from bottom to top, or the support 400 can make the patient's arm horizontally placed and keep the arm perpendicular or parallel to the height direction. Exemplarily, the second preset angle β=175°. Figure 4 As shown, in yet another embodiment, the second preset angle β=180°. In another embodiment, the second preset angle β=178°.

[0050] The size of the second preset angle β is set at different angles, so that the bracket 400 can adapt to different surgical situations, increasing the adaptability of the arm sling device with adjustable elbow angle for hip surgery in the embodiment of the present application.

[0051] like Figure 3 As shown, in one embodiment, the arm sling device with adjustable elbow angle for hip surgery further includes a first connecting belt 500 and a second connecting belt 550; the forearm sleeve 100 is connected to the first rod 410 through the first connecting belt 500 to ensure the installation stability of the forearm sleeve 100; the upper arm sleeve 200 is connected to the second rod 420 through the second connecting belt 550 to ensure the installation stability of the upper arm sleeve 200. Exemplarily, the first connecting belt 500 is connected to the forearm sleeve 100 and the first rod 410 by one of gluing, bolting, snap-fitting and bundling; Exemplarily, the second connecting belt 550 is connected to the upper arm sleeve 200 and the second rod 420 by one of gluing, bolting, snap-fitting and bundling.

[0052] In one embodiment, the first connecting strap 500 and the second connecting strap 550 are made of flexible materials, which leave a certain amount of room for movement for the forearm cuff 100 and the upper arm cuff 200, so that the patient can feel more comfortable when wearing the device, and the adaptability and flexibility of the device are improved to a certain extent. During surgery or recovery, the patient can adjust the angle and position of the arm as needed to obtain the best treatment effect.

[0053] like Figure 2 As shown, in one embodiment, the angle adjustment assembly 300 includes a mounting seat 310 , a first plate body 320 , a second plate body 330 , a first meshing gear 340 , a second meshing gear 350 , and a third meshing gear 360 .

[0054] The two ends of the first plate 320 are respectively a first mounting end and a first adjustment end, the first mounting end is provided with a forearm sleeve 100, the first adjustment end is fixedly provided with a first meshing gear 340, and the first meshing gear 340 is rotatably mounted on the mounting seat 310, so that the first plate 320, the forearm sleeve 100 and the first meshing gear 340 can rotate relative to the mounting seat 310. Exemplarily, the first plate 320 is fixedly connected to the first meshing gear 340 by means of integral molding, welding, gluing, clamping or bolting.

[0055] The two ends of the second plate 330 are respectively a second mounting end and a second adjustment end, the second mounting end is provided with an upper arm sleeve 200, the second adjustment end is fixedly provided with a second meshing gear 350, and the second meshing gear 350 is rotatably mounted on the mounting seat 310, so that the second plate 330, the upper arm sleeve 200 and the second meshing gear 350 can rotate relative to the mounting seat 310. Exemplarily, the second plate 330 is fixedly connected to the second meshing gear 350 by means of integral molding, welding, gluing, clamping or bolting.

[0056] The third meshing gear 360 is slidably mounted on the mounting seat 310 along the axial direction of the third meshing gear 360 and the third meshing gear 360 is stationary relative to the mounting seat 310 in the rotation direction.

[0057] The third meshing gear 360 has a meshing position and an unlocking position on the mounting base 310, and the third meshing gear 360 slides along its own axial direction to switch to different meshing positions; in the meshing position, the third meshing gear 360 meshes with the first meshing gear 340 and the second meshing gear 350 at the same time, and the third meshing gear 360 can stop the first meshing gear 340 and the second meshing gear 350 from rotating, so that the first meshing gear 340 and the second meshing gear 350 are stationary relative to the mounting base 310 in the rotation direction; in the unlocking position, the third meshing gear 360 is disengaged from the first meshing gear 340 and the second meshing gear 350, so that the first meshing gear 340 and the second meshing gear 350 can rotate relative to the mounting base 310.

[0058] During use, when it is necessary to adjust the first preset angle α between the forearm cuff 100 and the upper arm cuff 200, the third meshing gear 360 is switched from the meshing position to the unlocking position, so that the first meshing gear 340 and the second meshing gear 350, as well as the first plate body 320 and the second plate body 330 can rotate relative to the mounting base 310; when the first preset angle is adjusted to a suitable size, the third meshing gear 360 is switched from the unlocking position to the meshing position, so that the first meshing gear 340 and the second meshing gear 350 remain stationary in the rotation direction relative to the mounting base 310, thereby fixing the angle between the forearm cuff 100 and the upper arm cuff 200.

[0059] like Figure 2 and Figure 3 As shown, in one embodiment, the angle adjustment assembly 300 further includes a connecting block 380 and a pressing block 370 .

[0060] The connecting block 380 is fixedly connected to the third meshing gear 360. The movement of the connecting block 380 drives the third meshing gear 360 to move. A sliding channel is opened on the mounting seat 310 along the axial direction of the third meshing gear 360. The connecting block 380 and the sliding channel are slidably matched. The cross-section of the connecting block 380 and the sliding channel along the radial direction of the third meshing gear 360 is a polygon, so that the connecting block 380 is stationary in the rotation direction relative to the mounting seat 310 and the sliding channel.

[0061] Exemplarily, the connection block 380 is a cuboid, and the sliding channel is configured as a cuboid channel adapted to the connection block 380. In another embodiment, the connection block 380 is a triangular prism structure, and the sliding channel is configured as a triangular prism channel adapted to the connection block 380.

[0062] Exemplarily, the connection block 380 and the third meshing gear 360 are fixedly connected by welding, gluing, bolting, clamping or integral molding.

[0063] The connecting block 380 is fixedly connected to the pressing block 370 , and the pressing block 370 is located outside the mounting seat 310 . The connecting block 380 and the third meshing gear 360 are driven to move axially by pushing the pressing block 370 .

[0064] Exemplarily, the push block 370 and the connecting block 380 are fixedly connected by welding, gluing, bolting, clamping or integrally forming. A rounded corner is arranged on one end of the push block 370 away from the connecting block 380 .

[0065] In one embodiment, the arm sling device with adjustable elbow angle for hip surgery also includes an elastic member, which can be retracted and rebounded. The elastic member connects the mounting seat 310 and the third meshing gear 360. The elastic member can apply a force to the third meshing gear 360 to make the third meshing gear 360 approach the meshing position or have a tendency to approach the meshing position, and then the third meshing gear 360 is reset to the meshing position through the elastic member.

[0066] Exemplarily, the elastic member is one of the following: a coil spring, a leaf spring, etc.

[0067] In one embodiment, the forearm cuff 100 includes a first shell and a second shell, the second shell is buckled on the first shell, the first shell is fixedly connected to the first plate 320, and flexible liners are disposed in the first shell and the second shell.

[0068] Exemplarily, one end of the first shell is hinged to one end of the second shell, and the other end of the first shell is detachably connected to the other end of the second shell via a buckle. By opening the buckle, the other end of the first shell and the other end of the second shell move away from each other, thereby opening the forearm cuff 100 to facilitate the patient's forearm to be placed in the forearm cuff 100.

[0069] Exemplarily, the first plate 320 is fixedly connected to the first shell, and the fixed connection method is one of the following: by gluing, integral molding, welding, clamping or bolting, etc. In another embodiment, the first plate 320 is fixedly connected to the second shell, and the fixed connection method is one of the following: by gluing, integral molding, welding, clamping or bolting, etc.

[0070] Exemplarily, the flexible lining is at least one of the following: sponge, synthetic fiber, cotton fiber, foam plastic, etc.

[0071] In one embodiment, the upper arm cuff 200 includes a first shell and a second shell, the first shell is fixedly connected to the second plate 330, the second shell is buckled on the first shell, and flexible liners are disposed inside the first shell and the second shell.

[0072] Exemplarily, one end of the first shell is hingedly connected to one end of the second shell, and the other end of the first shell is detachably connected to the other end of the second shell by a buckle. When the buckle is opened, the other end of the first shell and the other end of the second shell move away from each other, thereby opening the upper arm cuff 200 to facilitate the patient's upper arm to be placed in the upper arm cuff 200.

[0073] Exemplarily, the second plate 330 is fixedly connected to the first housing, and the fixed connection method is one of the following: by gluing, integral molding, welding, clamping or bolting, etc. In another embodiment, the second plate 330 is fixedly connected to the second housing, and the fixed connection method is one of the following: by gluing, integral molding, welding, clamping or bolting, etc.

[0074] Exemplarily, the flexible lining is at least one of the following: sponge, synthetic fiber, cotton fiber, foam plastic, etc.

[0075] In yet another embodiment, the upper arm cuff 200 is an integrally formed sleeve-like structure, and the forearm cuff 100 is an integrally formed sleeve-like structure.

[0076] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0077] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0078] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An arm sling device with adjustable elbow angle for hip surgery, characterized in that: include: A forearm sleeve (100), wherein the forearm sleeve (100) is used to fix the forearm of a user; An upper arm cuff (200), the upper arm cuff (200) being used to fix the upper arm of a user, the angle between the upper arm cuff (200) and the forearm cuff (100) being a first preset angle α; An angle adjustment component (300) is connected to the forearm cuff (100) and the upper arm cuff (200) respectively, and the angle adjustment component (300) can adjust the size of a first preset angle α between the forearm cuff (100) and the upper arm cuff (200).

2. The arm sling device with adjustable elbow angle for hip surgery according to claim 1, characterized in that: Also includes: A bracket (400), the bracket (400) comprising a first rod body (410) and a second rod body (420), one end of the second rod body (420) being fixedly arranged, the other end of the second rod body (420) being fixedly connected to one end of the first rod body (410), and an angle between the first rod body (410) and the second rod body (420) being a second preset angle β; The upper arm cuff (200) is mounted on the second rod (420), and the forearm cuff (100) is connected to the first rod (410).

3. The arm sling device with adjustable elbow angle for hip surgery according to claim 2, characterized in that: in, 85°≤β≤95°。 4. The arm sling device with adjustable elbow angle for hip surgery according to claim 2, characterized in that: in, 175°≤β≤180°。 5. The arm sling device with adjustable elbow angle for hip surgery according to claim 2, characterized in that: Also includes: a first connecting belt, the forearm sleeve (100) being connected to the first rod (410) via the first connecting belt; A second connecting belt, the upper arm cuff (200) is connected to the second rod (420) via the second connecting belt.

6. The arm sling device with adjustable elbow angle for hip surgery according to claim 5, characterized in that: The first connecting belt and the second connecting belt are made of flexible material.

7. The arm sling device with adjustable elbow angle for hip surgery according to claim 1, characterized in that: The angle adjustment assembly (300) comprises: Mounting seat (310); A first plate body (320), wherein two ends of the first plate body (320) are respectively a first mounting end and a first adjustment end, the first mounting end is provided with the forearm cuff (100), the first adjustment end is fixedly provided with a first meshing gear (340), and the first meshing gear (340) is rotatably mounted on the mounting seat (310); A second plate body (330), the two ends of the second plate body (330) are respectively a second mounting end and a second adjustment end, the second mounting end is provided with the upper arm cuff (200), the second adjustment end is fixedly provided with a second meshing gear (350), and the second meshing gear (350) is rotatably mounted on the mounting seat (310); A third meshing gear (360), the third meshing gear (360) is slidably mounted on the mounting seat (310) along the axial direction of the third meshing gear (360) and the third meshing gear (360) is stationary relative to the mounting seat (310) in the rotation direction. The third meshing gear (360) has a meshing position and an unlocking position on the mounting seat (310). The third meshing gear (360) slides along the axial direction to switch to different meshing positions. In the meshing position, the third meshing gear (360) simultaneously meshes with the first meshing gear (340) and the second meshing gear (350), so that the first meshing gear (340) and the second meshing gear (350) are stationary relative to the mounting seat (310) in the rotation direction. In the unlocking position, the third meshing gear (360) is disengaged from the first meshing gear (340) and the second meshing gear (350).

8. The arm sling device with adjustable elbow angle for hip surgery according to claim 7, characterized in that: The angle adjustment assembly (300) further comprises: A connecting block (380), the connecting block (380) being fixedly connected to the third meshing gear (360), a sliding channel being provided on the mounting seat (310) along the axial direction of the third meshing gear (360), the connecting block (380) being slidably matched with the sliding channel, the cross-sections of the connecting block (380) and the sliding channel along the radial direction of the third meshing gear being polygonal, so that the connecting block (380) is stationary relative to the mounting seat (310) and the sliding channel in the rotation direction; A push block (370) is fixedly connected to the connecting block (380), and the push block (370) is located outside the mounting seat (310). The connecting block (380) and the third meshing gear (360) are driven to move axially by pushing the push block (370).

9. The arm sling device with adjustable elbow angle for hip surgery according to claim 8, characterized in that: Also includes: An elastic member, the elastic member can be retracted and rebounded, the elastic member connects the mounting seat (310) and the third meshing gear (360), and the elastic member can apply a force to the third meshing gear (360) so that the third meshing gear (360) approaches the meshing position or has a tendency to approach the meshing position.

10. The arm sling device with adjustable elbow angle for hip surgery according to claim 7, characterized in that: The forearm sleeve (100) comprises a first shell and a second shell, the second shell is buckled on the first shell, the first shell is fixedly connected to the first plate (320), and flexible liners are provided in the first shell and the second shell; And / or, the upper arm cuff (200) comprises a first shell and a second shell, the first shell is fixedly connected to the second plate (330), the second shell is buckled on the first shell, and flexible linings are provided in the first shell and the second shell.

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