Multifunctional arm support for fundus surgery

Abstract

The invention belongs to the field of operation arm supports, and provides a fundus operation multifunctional arm support which comprises a supporting plate, an inflation supporting cushion is installed on the upper surface of the supporting plate, and a fixing belt assembly is arranged above the inflation supporting cushion; the positioning assembly comprises a limiting frame, a connecting seat and a positioning rotating handle; a lifting rod is installed on the bottom face of the supporting plate, a connecting frame is fixedly installed on the bottom face of the supporting plate, the fixing frame is hinged to the lifting rod, and the lifting rod is slidably installed in the connecting base. The angle adjusting component comprises a limiting rod, a hinge plate, a meshing groove, an outer fluted disc and an inner gear ring; by arranging the positioning assembly and the angle adjusting part, rapid installation of the supporting plate and rapid rotation adjustment of the angles of the supporting plate and the inflatable supporting cushion are achieved, medical staff only need to pull a limiting rod on the side edge of the supporting plate, angle limitation of the supporting plate can be relieved, rotation operation is conducted, the limiting rod is loosened after the supporting plate is adjusted to the proper angle, and the medical staff can conveniently and rapidly install the supporting plate. And the angle can be automatically locked.

Description

Technical Field

[0001] The invention belongs to the field of surgical arm supports, in particular to a multifunctional arm support for fundus surgery. Background Art

[0002] With the continuous advancement of medical technology, the requirements for surgical auxiliary equipment are also increasing. In the field of fundus surgery, in order to improve the efficiency, safety and comfort of the patient, fundus surgery is an extremely delicate and complex surgical operation in the field of ophthalmology, which requires doctors to perform high-precision operations under a microscope. During the operation, the position and stability of the patient's arm have an important impact on the smooth progress of the operation. Due to the delicate nature of the surgical operation, the doctor needs the patient's arm to be able to remain in the appropriate position for a long time without shaking or displacement, otherwise it may interfere with the surgical field of view, increase the risk of surgery, and even affect the success rate of the operation.

[0003] Existing arm supports usually have the functions of fixing the arm and adjusting its length. However, for different people, due to different body shapes and different degrees of hand bending, it is difficult to change the angle of the arm with a conventional arm support. Medical staff need to bend over and adjust the bottom of the arm support, which is rather cumbersome and cannot adapt to the different requirements of the patient's arm angle for different surgical steps and doctors' operating habits.

[0004] Therefore, those skilled in the art have proposed a multifunctional arm support for fundus surgery to solve the problems raised by the background technology. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a multifunctional arm rest for fundus surgery to solve the problems in the prior art that it is difficult to change the angle of the arm placement and medical staff need to bend over to adjust the bottom of the arm rest, which is rather cumbersome.

[0006] A multifunctional arm support for fundus surgery, comprising: a support plate, an inflatable support pad is installed on the upper surface of the support plate, and a fixing belt assembly is provided above the inflatable support pad;

[0007] The positioning assembly includes a limit frame, a connecting seat, and a positioning handle; a lifting rod is installed on the bottom surface of the support plate, a connecting frame is fixedly installed on the bottom surface of the support plate, the connecting frame is hinged with the lifting rod, and the lifting rod is slidably installed in the connecting seat;

[0008] An angle adjustment component includes a limit rod, a hinge plate, an engaging groove, an outer toothed disc and an inner toothed ring; a rotation groove is provided at one end of the lifting rod, a connecting groove is provided on the inner wall of the rotation groove, a first limit column is slidably connected between the hinge plate and the connecting groove, a reset spring is provided between the first limit column and the bottom wall of the connecting groove, and an engaging groove is provided on one side wall of the hinge plate, an outer toothed disc is provided at the engaging groove, an inner toothed ring is fixedly installed on the inner wall of the rotation groove, the outer toothed disc is meshed with the inner toothed ring, and the limit rod is slidably installed in the support plate.

[0009] Through the above technical solution, the armrest can be easily installed on the side rail of the fundus surgery platform through the coordinated action of the limit frame, the connecting seat, the positioning handle and the lifting rod, and the height of the support plate and the inflatable support pad can be conveniently adjusted. This allows medical staff to quickly adapt to the height requirements of the arm placement of patients of different heights without the need for complex tools or cumbersome operations, greatly improving the efficiency of the surgical preparation stage; the angle adjustment component realizes the rapid rotation adjustment of the angle of the support plate and the inflatable support pad.

[0010] Preferably, a through slot is provided between the inner bottom surface and the side wall of the support plate, the limiting rod is an "L"-shaped rod structure, the limiting rod slides in the through slot, and one end of the limiting rod is fixedly connected to a handle.

[0011] Preferably, an axis groove is formed in the inner wall of the through groove, a second limit column is fixedly connected to the inner wall of the limit rod, the second limit column slides in the axis groove, and a memory spring is provided between the side wall of the axis groove and the inner wall of the limit rod.

[0012] Preferably, a slide groove passes through the side wall of the support plate, a slide plate slides on the inner wall of the slide groove, an extrusion groove is opened on the upper surface of the slide plate, a pressure plate slides in the extrusion groove, the pressure plate fits the side wall of the support plate, and a tightening knob is installed on the side wall of the slide plate, and the position of the tightening knob corresponds to the pressure plate.

[0013] Through the above technical solution, the position of the sliding plate can be adjusted by sliding, so as to quickly adjust the position of the fixing belt assembly to adapt to different arm positions of surgical personnel.

[0014] Preferably, the other side wall of the slide plate is fixedly connected to a limiting plate, and the limiting plate is in contact with the other side wall of the support plate.

[0015] Preferably, the fixing strap assembly comprises a first fixing strap connected to a side wall of the skateboard and a second fixing strap connected to another side wall of the skateboard, and a buckle is installed between the first fixing strap and the second fixing strap.

[0016] Through the above technical solution, the position of the fixing belt assembly can be flexibly adjusted and fixed according to the arm conditions of different surgical personnel, thereby improving the flexibility of fixation. The fixing belt assembly can change its position by sliding the slide plate in the slide groove. Combined with the tightening knob, pressure plate, and limit plate, it can be flexibly fixed according to the arm thickness of different surgical personnel, ensuring that the arms of different patients can be stably and comfortably placed on the arm rest, which is conducive to the smooth progress of the operation.

[0017] Preferably, a concave groove is provided on the upper surface of the inflatable support pad.

[0018] Preferably, an inflation port is provided on the side wall of the inflatable support cushion.

[0019] Through the above technical solution, the inflatable support cushion can quickly adapt to arms of different sizes by adjusting the inflation amount, providing comfortable cushioning support.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention realizes the rapid installation of the support plate and the rapid rotation adjustment of the angles of the support plate and the inflatable support pad by setting a positioning component and an angle adjustment component. The medical staff only needs to pull the limit rod on the side of the support plate to release the angle limit of the support plate and perform the rotation operation. After adjusting to the appropriate angle, the limit rod is released and the angle can be automatically locked. Compared with the traditional method that requires bending over to adjust at the bottom of the arm support, it is not only easier to operate, but also saves the physical strength and time of the medical staff, so that they can focus more on the patient's eye surgery during the operation and reduce the surgical risks caused by the inconvenience of angle adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 for Figure 1 A partial enlarged view of part B;

[0024] Figure 3 It is a schematic diagram of the right three-dimensional structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the present invention viewed from above;

[0026] Figure 5 for Figure 4 Schematic diagram of the AA section structure;

[0027] Figure 6 for Figure 5 A partial enlarged view of part C in the middle;

[0028] Figure 7 It is a rear-view stereoscopic structural schematic diagram of the present invention.

[0029] In the figure:

[0030] 1. Positioning assembly; 101. Limiting frame; 102. Connecting seat; 103. Positioning handle; 104. Positioning knob; 2. Lifting rod; 201. Rotating slot; 201a. Connecting slot; 202. First limiting column; 203. Reset spring; 204. Connecting frame; 3. Support plate; 301. Sliding slot; 302. Sliding plate; 303. Extrusion slot; 304. Pressing plate; 305. Fastening knob; 306. First fixing belt; 307. Limiting plate; 308. Second fixing belt; 309. Buckle; 401. Hinge plate; 402. Engaging slot; 403. External toothed disc; 404. Internal toothed ring; 5. Inflatable support pad; 501. Inflating port; 6. Through slot; 601. Handle; 602. Axis slot; 7. Limiting rod; 8. Second limiting column; 9. Memory spring. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0032] Embodiment 1: As shown in the attached Figure 1 As shown: The present invention provides a multifunctional arm support for fundus surgery, comprising a support plate 3, a positioning component 1 and an angle adjustment component;

[0033] As attached Figure 1 , 3 As shown: an inflatable support pad 5 is installed on the upper surface of the support plate 3, and a fixing belt assembly is provided above the inflatable support pad 5. The support plate 3 can support the hand, and the inflatable support pad 5 can quickly provide buffer support for the arm, and has good comfort and is easy to fit arms of different sizes;

[0034] As attached Figure 1 , 2 As shown: the positioning component 1 includes a limit frame 101, a connecting seat 102, and a positioning knob 103; a lifting rod 2 is installed on the bottom surface of the support plate 3, and a connecting frame 204 is fixedly installed on the bottom surface of the support plate 3, the connecting frame 204 is hinged to the lifting rod 2, and the lifting rod 2 is slidably installed in the connecting seat 102; by setting the positioning component 1, the limit frame 101 adopts a "U"-shaped plate structure, and the device can be quickly installed on the side slide rail of the fundus surgery support table through the limit frame 101, and the position of the limit frame 101 can be locked by rotating the positioning knob 104; the limit of the lifting rod 2 can be released by rotating the positioning knob 103, and the height of the support plate 3 and the inflatable support pad 5 can be quickly adjusted by sliding the lifting rod 2, which is convenient for arm support at different heights;

[0035] As attached Figure 4 , 56: The angle adjustment component includes a limit rod 7, a hinge plate 401, a meshing groove 402, an outer toothed disc 403 and an inner toothed ring 404; a rotation groove 201 is provided at one end of the lifting rod 2, a connecting groove 201a is provided on the inner wall of the rotation groove 201, a first limit column 202 is slidably connected between the hinge plate 401 and the connecting groove 201a, a return spring 203 is provided between the first limit column 202 and the bottom wall of the connecting groove 201a, and a meshing groove 402 is provided on one side wall of the hinge plate 401, an outer toothed disc 403 is provided at the meshing groove 402, an inner toothed ring 404 is fixedly installed on the inner side wall of the rotation groove 201, the outer toothed disc 403 is engaged with the inner toothed ring 404, and the limit rod 7 is slidably installed in the support plate 3;

[0036] The angle of the support plate 3 and the inflatable support pad 5 can be quickly adjusted by the angle adjustment component. The support plate 3 can stably rotate along the rotation groove 201 through the hinge plate 401. The first limit column 202 cooperates with the return spring 203, so that the hinge plate 401 can drive the first limit column 202 to move in the connection groove 201a while having the rotation function. When the angle of the support plate 3 needs to be adjusted, the limit rod 7 is pulled, and the limit rod 7 drives the hinge plate 401 to move, and the first limit column 202 presses down the return spring 203. At this time, the outer toothed disc 403 is disengaged from the inner toothed ring 404 and the meshing is released. At this time, while pulling the limit rod 7, force is applied at the end of the limit rod 7 to rotate the support plate 3. When it is rotated to a suitable angle, the limit rod 7 is released, and the reset spring 203 is reset to reset the first limit column 202, the hinge plate 401 and the outer toothed disc 403. At this time, the outer toothed disc 403 is ejected into the inner toothed ring 404, and the outer toothed disc 403 is fully meshed with the inner toothed ring 404, thereby limiting the angle of the support plate 3 and preventing the support plate 3 from loosening after the angle is adjusted;

[0037] During this process, a connecting frame 204 is set between the support plate 3 and the lifting rod 2 to ensure the connection stability between the support plate 3 and the lifting rod 2, thereby avoiding the lateral displacement of the support plate 3 relative to the lifting rod 2 when the limit rod 7 is pulled, thereby improving the convenience and stability when adjusting the angle of the hinge plate 401.

[0038] A through groove 6 is provided between the inner bottom surface and the side wall of the support plate 3, and the limit rod 7 is an "L"-shaped rod structure. The limit rod 7 slides in the through groove 6, and one end of the limit rod 7 is fixedly connected to a handle 601; the limit rod 7 can be quickly pulled by the handle 601, so that the staff can quickly pull the limit rod 7 at the side of the support plate 3 to adjust the angle of the support plate 3; the conventional adjustment method requires leaning over to adjust the tightness of the knob at the end of the lifting rod 2, which is relatively cumbersome.

[0039] An axial groove 602 is provided on the inner wall of the through groove 6, and a second limiting column 8 is fixedly connected to the inner wall of the limiting rod 7. The second limiting column 8 slides in the axial groove 602, and a memory spring 9 is provided between the side wall of the axial groove 602 and the inner wall of the limiting rod 7. By providing the memory spring 9, the outer gear disk 403 can be tightly connected with the inner gear ring 404, thereby improving the connection stability and ensuring that the limiting rod 7 can be reset in time after being pulled, thereby improving the reset performance.

[0040] A slide groove 301 runs through the side wall of the support plate 3, and a slide plate 302 slides on the inner wall of the slide groove 301. An extrusion groove 303 is opened on the upper surface of the slide plate 302, and a pressure plate 304 slides in the extrusion groove 303. The pressure plate 304 fits the side wall of the support plate 3, and a fastening knob 305 is installed on the side wall of the slide plate 302, and the position of the fastening knob 305 corresponds to the pressure plate 304; the other side wall of the slide plate 302 is fixedly connected to a limiting plate 307, and the limiting plate 307 fits the other side wall of the support plate 3; by adjusting the fastening knob 305, the extrusion state between the pressure plate 304 and the support plate 3 can be changed. When the pressure plate 304 is separated from the support plate 3, the limit of the position of the slide plate 302 can be changed. By sliding the slide plate 302, the position of the fixing belt assembly can be changed, which is convenient for fixing the arms of different surgical personnel and improves the fixation flexibility.

[0041] The fixing strap assembly includes a first fixing strap 306 connected to the side wall of the skateboard 302 and a second fixing strap 308 connected to the other side wall of the skateboard 302. A buckle 309 is installed between the first fixing strap 306 and the second fixing strap 308. The buckle 309 can be used to adjust the length of the first fixing strap 306 and quickly snap-fit ​​and fix it with the second fixing strap 308. By pressing the buttons on both sides of the buckle 309, the two ends of the buckle 309 can be disassembled to separate the fixing straps.

[0042] As can be seen from the above, first, align the limit frame 101 of the fundus surgery multifunctional arm support with the side rail of the fundus surgery support platform, and then insert the limit frame 101 into the rail. Next, turn the positioning knob 104 to tightly fix the limit frame 101 on the rail to ensure that the arm support will not move during the operation.

[0043] The doctor turns the positioning knob 103 according to the arm height of the patient to be operated on, and releases the limit of the lifting rod 2. Then, the lifting rod 2 is slid upward or downward to adjust the height of the support plate 3 and the inflatable support pad 5. For example, for a tall patient, the lifting rod 2 is raised to a certain height so that the support plate 3 is at a comfortable height position when the patient's arm is naturally placed. After adjusting the height, the positioning knob 103 is turned again to lock the position of the lifting rod 2.

[0044] Adjust the position of the fixing belt assembly according to the thickness of the patient's arm and the requirements of the surgical operation. First, loosen the tightening knob 305 to release the squeeze state between the pressing plate 304 and the supporting plate 3, and then slide the slide plate 302 in the slide groove 301 to move the first fixing belt 306 and the second fixing belt 308 to a suitable position. For example, for patients with thicker arms, move the fixing belt assembly to the outside of the supporting plate 3 to provide a wider fixing space. After adjusting the position, tighten the tightening knob 305 to make the pressing plate 304 press the supporting plate 3 and fix the position of the slide plate 302.

[0045] The patient places his arm on the inflatable support cushion 5, and the doctor wraps the first fixing belt 306 and the second fixing belt 308 around the patient's arm, and clamps them together through the buckle 309 to ensure that the arm is stably fixed on the support plate 3. During the operation, if the angle of the support plate 3 needs to be adjusted, the doctor holds the handle 601 and pulls the limit rod 7 outward. At this time, the limit rod 7 drives the hinge plate 401 to move, the first limit column 202 presses the reset spring 203, and the outer toothed disc 403 is separated from the inner toothed ring 404.

[0046] Then, the doctor applies a rotational force to the handle 601 while pulling the limit rod 7, so that the support plate 3 rotates around the rotating groove 201 to a suitable angle; after adjusting the angle, the handle 601 is released, and the reset spring 203 resets the first limit column 202, the hinge plate 401 and the outer gear disc 403, and the outer gear disc 403 re-engages with the inner gear ring 404 to lock the angle of the support plate 3.

[0047] Embodiment 2: As shown in the attached Figure 7 As shown: this embodiment is basically the same as the previous embodiment, except that a concave groove is provided on the upper surface of the inflatable support cushion 5, and an inflation port 501 is provided on the side wall of the inflatable support cushion 5.

[0048] As can be seen from the above, during inflation, air is inflated into the inflatable cushion 5 through the inflation port 501 to make the inflatable cushion 5 reach a suitable hardness and height. For patients with thinner arms, the inflation amount can be appropriately reduced so that the concave groove on the upper surface of the inflatable cushion 5 can better fit the arm and provide more precise support.

[0049] After the patient's arm is placed on the inflatable support pad 5 and fixed, if the angle of the support plate 3 needs to be adjusted during the operation, the operation is the same as in Example 1. Since the inflatable support pad 5 is provided with a concave groove, the arm can be placed more stably on the support plate 3 during the angle adjustment process, reducing the possibility of arm displacement due to angle changes, and further improving the safety and accuracy of the surgical operation.

[0050] Embodiment 3: Based on the patient's body shape and arm condition, the doctor preliminarily determines the approximate appropriate heights of the support plate 3 and the inflatable support pad 5; turns the positioning knob 103 to release the limit on the lifting rod 2, holds the lifting rod 2 with both hands, and slides slowly and steadily up or down, and constantly refers to the height position of the patient's arm when it is naturally drooping during the sliding process. For example, for patients with long arms who are accustomed to stretching their arms, the lifting rod 2 is appropriately raised to make the support plate 3 slightly higher than the normal height so that the patient's arm can be placed naturally and comfortably; after adjusting to the appropriate height, turn the positioning knob 103 again, and carefully feel and confirm that the lifting rod 2 has been firmly locked.

[0051] Check the thickness of the patient's arm. If the patient's arm is relatively thick, the patient, under the guidance of the medical staff, gently places the arm on the inflatable support pad 5, loosens the tightening knob 305, and moves the first fixing belt 306 and the second fixing belt 308 to a wider position so as to better surround the patient's arm. After adjusting the position, tighten the tightening knob 305 to ensure that the pressing plate 304 presses the support plate 3, and then check the stability of the slide plate 302 again;

[0052] The medical staff wraps the first fixing belt 306 and the second fixing belt 308 around the patient's arm, inserts the end of the first fixing belt 306 into one side of the buckle 309, and then tightens the fixing belt to make the arm stable on the support plate 3 but not too tight.

[0053] When the angle of the support plate 3 needs to be adjusted to adapt to the change of the surgical operation angle, the doctor holds the handle 601 with the index finger and the middle finger, and slowly pulls the limit rod 7 outward. At this time, a certain resistance can be felt and the hinge plate 401 begins to move. The first limit column 202 gradually presses the reset spring 203, and the outer toothed disc 403 slowly disengages from the inner toothed ring 404. While pulling the handle 601, a gentle rotation force is applied to the handle 601 to slowly rotate the support plate 3 around the rotating groove 201 in the direction required by the operation. During the rotation process, the doctor's eyes always pay attention to the relative position of the surgical site and the instrument. When the ideal angle is reached, the handle 601 is released, and the reset spring 203 can be seen to quickly reset the first limit column 202, the hinge plate 401 and the outer toothed disc 403, and the outer toothed disc 403 is tightly meshed with the inner toothed ring 404 again, and the angle of the support plate 3 is accurately locked.

[0054] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

[0055] In the description of the present invention, 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. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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.

[0057] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0059] In the drawings of the embodiments disclosed in the present invention, only the structures involved in the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional arm support for fundus surgery, characterized in that: include: A support plate (3), wherein an inflatable support pad (5) is mounted on the upper surface of the support plate (3), and a fixing belt assembly is provided above the inflatable support pad (5); A positioning assembly (1) comprises a limiting frame (101), a connecting seat (102), and a positioning handle (103); a lifting rod (2) is installed on the bottom surface of the support plate (3); a connecting frame (204) is fixedly installed on the bottom surface of the support plate (3); the connecting frame (204) is hinged to the lifting rod (2); and the lifting rod (2) is slidably installed in the connecting seat (102); The angle adjustment component comprises a limit rod (7), a hinge plate (401), an engagement groove (402), an outer toothed disc (403) and an inner toothed ring (404); a rotation groove (201) is provided at one end of the lifting rod (2); a connecting groove (201a) is provided on the inner wall of the rotation groove (201); a first limit column (202) is slidably connected between the hinge plate (401) and the connecting groove (201a); and the first limit column A return spring (203) is provided between the bottom wall of the connecting groove (202) and the connecting groove (201a), and a meshing groove (402) is provided on one side wall of the hinged plate (401), an outer toothed disc (403) is provided at the meshing groove (402), an inner toothed ring (404) is fixedly installed on the inner side wall of the rotating groove (201), the outer toothed disc (403) meshes with the inner toothed ring (404), and the limiting rod (7) is slidably installed in the support plate (3).

2. A multifunctional arm support for fundus surgery as claimed in claim 1, characterized in that: A through slot (6) is provided between the inner bottom surface and the side wall of the support plate (3); the limiting rod (7) is an "L"-shaped rod structure; the limiting rod (7) slides in the through slot (6); and one end of the limiting rod (7) is fixedly connected to a handle (601).

3. A multifunctional arm support for fundus surgery as claimed in claim 2, characterized in that: An axial groove (602) is provided on the inner wall of the through groove (6); a second limiting column (8) is fixedly connected to the inner wall of the limiting rod (7); the second limiting column (8) slides in the axial groove (602); and a memory spring (9) is provided between the side wall of the axial groove (602) and the inner wall of the limiting rod (7).

4. A multifunctional arm support for fundus surgery as claimed in claim 1 or 3, characterized in that: A slide groove (301) passes through the side wall of the support plate (3), a slide plate (302) slides on the inner wall of the slide groove (301), an extrusion groove (303) is provided on the upper surface of the slide plate (302), a pressure plate (304) slides in the extrusion groove (303), the pressure plate (304) fits the side wall of the support plate (3), and a tightening knob (305) is installed on the side wall of the slide plate (302), and the position of the tightening knob (305) corresponds to that of the pressure plate (304).

5. A multifunctional arm support for fundus surgery as claimed in claim 4, characterized in that: The other side wall of the slide plate (302) is fixedly connected to a limiting plate (307), and the limiting plate (307) is in contact with the other side wall of the support plate (3).

6. A multifunctional arm support for fundus surgery as claimed in claim 5, characterized in that: The fixing belt assembly comprises a first fixing belt (306) connected to a side wall of the slide plate (302) and a second fixing belt (308) connected to another side wall of the slide plate (302), and a buckle (309) is installed between the first fixing belt (306) and the second fixing belt (308).

7. The multifunctional arm support for fundus surgery as claimed in claim 1, characterized in that: The upper surface of the inflatable support pad (5) is provided with a concave groove.

8. The multifunctional arm support for fundus surgery as claimed in claim 7, characterized in that: The side wall of the inflatable support cushion (5) is provided with an inflation port (501).

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