Elbow joint limiting anti-pipe-falling device

Abstract

The invention relates to the technical field of medical equipment, and discloses an elbow joint limiting anti-tube-falling device which comprises a large arm supporting body, a small arm supporting body, a bandage, a buffer cushion a and a buffer cushion b and further comprises an angle limiting mechanism and an over-limit alarm mechanism. The angle limiting mechanism comprises connecting rods a fixedly installed at the lower ends of the two sides of the large arm supporting body through screws, outer cover plates are arranged at the lower ends of the connecting rods a, pressing locking assemblies are movably installed in the outer cover plates, and connecting rods b are arranged on the side walls of the pressing locking assemblies. The over-limit alarm mechanism comprises an electronic element groove and a sound hole which are formed in the pressing and locking assembly, a battery, a loudspeaker and a control assembly are fixedly installed in the over-limit alarm mechanism, and a pressure sensing piece is arranged on the peripheral side of the pressing and locking assembly; according to the elbow joint limiting anti-tube-falling device, the angle limiting mechanism capable of adjusting the bending angle of the elbow joint and the over-limit alarm mechanism are designed and adopted, and when a patient tries to exceed the limiting angle, the safety of the patient can be effectively guaranteed, and the risk of unplanned tube drawing is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an elbow joint limiting and tube anti - detachment device. Background Art

[0002] During the process of clinical disease treatment and nursing, patients may experience impaired consciousness due to diseases, surgical anesthesia, etc., or the phenomenon of self - extubation due to discomfort caused by indwelling catheters is relatively common. Such unplanned extubation usually causes problems such as changes in the patient's condition, extended hospital stay, and increased treatment costs, seriously affecting the safety of patients.

[0003] First of all, the existing solutions usually require tying the patient's upper limbs to the bed, which not only restricts the normal activities of the patient but also may cause psychological discomfort to the patient, leading to stronger resistance and extubation behavior.

[0004] Secondly, the current angle - limiting devices have a single function and cannot flexibly adjust the flexion angle of the patient's elbow joint according to actual needs, making it difficult to meet the needs of different patients and nursing scenarios. More importantly, the existing devices lack an effective alarm function and cannot timely remind medical staff when the patient attempts to exceed the limited angle and touch the catheter, posing a large safety hazard.

[0005] Therefore, there is an urgent need to design an elbow joint limiting and tube anti - detachment device that can solve the above - mentioned technical problems. Summary of the Invention

[0006] Aiming at the problems mentioned in the background art, the purpose of the present invention is to provide an elbow joint limiting and tube anti - detachment device to solve the problems mentioned in the background art.

[0007] To achieve the above purpose, the present invention mainly provides the following technical solutions:

[0008] An elbow joint limiting and tube anti - detachment device, including a large - arm support body, a small - arm support body, a strap, a buffer pad a, and a buffer pad b, further including:

[0009] An angle - limiting mechanism and an over - limit alarm mechanism; where:

[0010] The angle - limiting mechanism includes a connecting rod a fixedly installed at the lower ends on both sides of the large - arm support body through screws. The lower end of the connecting rod a is provided with an outer cover plate, and a pressing and locking component is movably installed inside the outer cover plate. A connecting rod b is provided on the side wall of the pressing and locking component;

[0011] The over - limit alarm mechanism includes an electronic component slot and a sound hole opened in the pressing and locking component, inside which a battery, a speaker, and a control component are fixedly installed. A pressure - sensing sheet is provided on the periphery of the pressing and locking component.

[0012] Further, the inner part of the outer cover plate is hollow. A fixed shaft hole is opened at the center of the inner bottom wall, and a limiting tooth a is provided on the peripheral side. A connecting rod groove is opened on the upper right side of the inner side wall, and an adjusting shaft hole is opened at the center of the upper surface. On the right side of the outer periphery of the adjusting shaft hole, there is an angle scale, and a clamping member b is provided on the left side. The right side is movably connected to the anti-opening cover through a connecting shaft. On the left side of the bottom of the anti-opening cover, there is a clamping member a, which is clamped and connected to the clamping member b;

[0013] On the clockwise rotation side of the limiting tooth a, a protruding piece is fixedly installed.

[0014] Further, the pressing and locking assembly includes a fixed clamping shaft that is clamped and connected to the fixed shaft hole. On its upper surface, there is a height control assembly. On the outside of the height control assembly, there is a main rotating shaft. On the outer periphery of the main rotating shaft, there is a limiting tooth b that is meshed and connected to the limiting tooth a. At the center of the upper surface of the main rotating shaft, there is an adjusting shaft. On the upper surface of the adjusting shaft, there is a dust-proof disc. On the upper surface of the dust-proof disc, there is a rotating piece, and at the front end of the rotating piece, there is an indicating arrow.

[0015] Further, the height control assembly includes a limiting groove opened at the center of the lower surface of the main rotating shaft. Inside the limiting groove, there is a partition plate longitudinally arranged. On both sides of the partition plate, there are a pointing rod, a first limiting block, and a second limiting block in sequence from top to bottom. At the lower end of the partition plate, there is a return spring, and the other end of the return spring is fixedly connected to the upper surface of the fixed clamping shaft. Inside the inner circle of the return spring, there is a fixed collar on the upper surface of the fixed clamping shaft. Inside the fixed collar, a limiting rod is movably installed, and the other end of the limiting rod is movably clamped and connected to the first limiting block.

[0016] Further, the electronic component slot is opened inside the left side of the main rotating shaft, and a sound hole is opened on the upper surface;

[0017] The pressure sensing piece is installed on the counterclockwise rotation side of the limiting tooth b, and its inner side wall is electrically connected to the control assembly, and its outer side wall is meshed and clamped with the protruding piece.

[0018] Further, the connecting rod b is installed at the top of the right side wall of the main rotating shaft and extends out of the connecting rod groove, and it is fixedly connected to the upper ends on both sides of the small arm support body through screws;

[0019] On the left side of the openings on the side walls of the large arm support body and the small arm support body, there are fixed rings, and on the right side, there are straps. The other end of the strap passes through the fixed ring and winds around and adheres to the surface of the middle part of the strap;

[0020] The buffer pad a is fixedly installed on the inner surfaces of the large arm support body and the small arm support body, and the outer periphery of the buffer pad b is fitted and installed on the inner side wall of the angle limiting mechanism.

[0021] Further, the large arm support body and the small arm support body are made of a lightweight and high-strength composite material; the buffer pad a and the buffer pad b are made of medical silicone material; the connecting rod a and the connecting rod b are made of aluminum alloy or stainless steel material.

[0022] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in:

[0023] First of all, compared with the existing solution that requires tying the patient's upper limbs to the bed, the patient's range of motion is strictly restricted and it is easy to cause psychological discomfort. To solve this problem, an elbow joint limit and anti-disconnection tube device of the present invention adopts an angle limit mechanism that can adjust the flexion angle of the elbow joint. By limiting the maximum flexion angle of the elbow joint, it prevents the patient's hand from touching the catheter, thereby realizing the protection of the patient's catheter without tying the upper limbs, and significantly improving the comfort of the patient.

[0024] Secondly, compared with the existing devices which are single in function and lack an alarm function. To solve this problem, an elbow joint limit and anti-disconnection tube device of the present invention adopts an over-limit alarm mechanism. This mechanism uses a pressure sensing sheet to monitor the movements of the patient's elbow joint in real time. When the patient attempts to exceed the restricted angle, an alarm signal will be triggered, timely reminding the medical staff to take intervention measures, effectively ensuring the safety of the patient and reducing the risk of unplanned extubation.

[0025] The above description is only an overview of the technical solution of the present invention. In order to clearly understand the technical means of the present invention and be able to implement it according to the content of the specification, the following preferred embodiments of the present invention are described in detail in conjunction with the accompanying drawings as follows. Brief Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 Is a perspective view of an elbow joint limit and anti-disconnection tube device of the present invention;

[0028] Figure 2 Is an exploded view of an elbow joint limit and anti-disconnection tube device of the present invention;

[0029] Figure 3 Is a left view of an elbow joint limit and anti-disconnection tube device of the present invention;

[0030] Figure 4 Is a structural diagram of the outer cover plate of the present invention;

[0031] Figure 5 Is a structural diagram of the pressing and locking component of the present invention;

[0032] Figure 6 Is a front view of the pressing and locking component of the present invention;

[0033] Figure 7 The mechanism of the angle limiting mechanism of the present invention Figure 1 (Front view of the height control component);

[0034] Figure 8 Of the present invention Figure 7 Enlarged view of part A in;

[0035] Figure 9 The mechanism of the angle limiting mechanism of the present invention Figure 1 (Left view of the height control component);

[0036] Figure 10 Of the present invention Figure 9 Enlarged view of part B in;

[0037] Figure 11 Structural diagram of the overlimit alarm mechanism of the present invention;

[0038] Explanation of reference numerals:

[0039] 1. Boom support; 2. Forearm support; 3. Strap; 4. Angle limiting mechanism; 5. Overlimit alarm mechanism; 6. Buffer pad a;

[0040] 31. Fixed ring;

[0041] 41. Outer cover plate; 42. Connecting rod a; 43. Pressing and locking component; 44. Connecting rod b; 45. Screw; 46. Buffer pad b;

[0042] 51. Electronic component slot; 52. Battery; 53. Speaker; 54. Control component; 55. Sound hole; 56. Pressure sensing sheet;

[0043] 411. Anti-opening cover; 412. Clamping part b; 413. Limiting clamping teeth a; 414. Protruding piece; 415. Connecting rod slot; 416. Adjusting shaft hole; 417. Fixed shaft hole; 418. Angle scale;

[0044] 4111. Connecting shaft; 4112. Clamping part a;

[0045] 431. Fixed clamping shaft; 432. Height control component; 433. Main rotating shaft; 434. Limiting clamping teeth b; 435. Adjusting shaft; 436. Dust-proof disc; 437. Rotating part; 438. Indicator arrow;

[0046] 4321. Return spring, 4322. Fixed collar; 4323. Limiting rod; 4324. Limiting groove; 4325. Partition plate; 4326. Pointing rod; 4327. First limiting block; 4328. Second limiting block; Detailed implementation method

[0047] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. In addition, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0048] As Figure 1-11 shown, an elbow joint limit and anti-disconnection tube device of the present invention includes a large arm support body 1, a small arm support body 2, a strap 3, a buffer pad a6 and a buffer pad b46, and further includes:

[0049] an angle limiting mechanism 4 and an overlimit alarm mechanism 5; wherein:

[0050] The angle limiting mechanism 4 includes a connecting rod a42 fixedly installed at the lower ends on both sides of the large arm support body 1 through screws 45. The connecting rod a42 provides support and fixing points to ensure the stability of the device, and at the same time provides a connection structure for the installation of the outer cover plate 41 and the pressing and locking assembly 43. An outer cover plate 41 is provided at the lower end of the connecting rod a42, and a pressing and locking assembly 43 is movably installed inside the outer cover plate 41. The pressing and locking assembly 43 is a structure of pressing to unlock, rotating to adjust, and pressing again to lock. A connecting rod b44 is provided on the side wall of the pressing and locking assembly 43. The connecting rod b44 connects the angle limiting mechanism 4 with the small arm support body 2 to form an integral structure;

[0051] The overlimit alarm mechanism 5 includes an electronic component slot 51 and a sound hole 55 opened in the pressing and locking assembly 43. The electronic component slot 51 is used to accommodate the core electronic components of the alarm system, and the sound hole 55 is used to transmit the alarm sound signal to remind the medical staff to intervene in time. A battery 52, a speaker 53 and a control component 54 are fixedly installed therein. A pressure sensing sheet 56 is provided on the periphery of the pressing and locking assembly 43. The pressure sensing sheet 56 can sense the pressure change between the pressing and locking assembly 43 and the limiting structure in real time. When the patient attempts to forcibly bend the arm beyond the set angle, the pressure sensing sheet 56 will trigger a signal and start the alarm system through the control component 54 to form a warning mechanism, effectively preventing the patient from accidentally pulling out the tube.

[0052] As Figure 4As shown, in this embodiment, the inner part of the outer cover plate 41 is hollow, providing space for the arrangement of the pressing and locking assembly 43 and other internal components. A fixing shaft hole 417 is opened at the center of the inner bottom wall. The fixing shaft hole 417 is used to accommodate the fixing card shaft 431 to ensure the stable installation and rotation of the pressing and locking assembly 43. A limiting card tooth a413 is provided on the peripheral side. By engaging with the limiting card tooth b434, precise control of the rotation angle is achieved. A connecting rod groove 415 is opened on the upper right side of the inner side wall to provide space for the installation of the connecting rod b44 and ensure the reliable connection between the angle limiting mechanism 4 and the small arm support 2. An adjusting shaft hole 416 is opened at the center of the upper surface. The adjusting shaft hole 416 provides an installation position for the adjusting shaft 435. On the right side of the outer periphery of the adjusting shaft hole 416, an angle scale 418 is provided. Different rotation angle values are indicated by clear scales, facilitating the user to adjust the angle limiting range. A card part b412 is provided on the left side and is movably connected to the anti-opening cover 411 through a connecting shaft 4111, enabling the anti-opening cover 411 to open and close freely, effectively protecting the internal structure. A card part a4112 is provided at the left bottom of the anti-opening cover 411, which is snap-connected to the card part b412, further improving the fixing stability of the anti-opening cover 411 and preventing the anti-opening cover 411 from being accidentally opened due to external force;

[0053] A protruding piece 414 is fixedly installed on the clockwise rotation side of the limiting card tooth a413. Through the meshing action with the limiting card tooth b434, the main rotating shaft 433 is locked within a specific range, and at the same time, the angle exceeding the limit value can be prevented, further improving the safety performance.

[0054] As Figure 5 , 6As shown, in this embodiment, the pressing and locking component 43 includes a fixed clamping shaft 431 that is snap-connected to the fixed shaft hole 417. The fixed clamping shaft 431 is snap-connected to the fixed shaft hole 417, ensuring the stable installation of the component on the inner bottom wall of the outer cover plate 41 and providing a fulcrum required for rotation. A height control component 432 is provided on its upper surface. The height adjustment realizes the adjustment of the meshing depth between the pressing and locking component 43 and the limit clamping teeth, so as to realize pressing to unlock, rotation adjustment, and pressing again to lock. Outside the height control component 432, there is a main rotating shaft 433. A limit clamping tooth b434 that is meshed with the limit clamping tooth a413 is provided on the outer circumference of the main rotating shaft 433. The main rotating shaft 433 forms the core transmission component of the angle limiting mechanism 4 through the meshing connection with the limit clamping tooth a413 and the limit clamping tooth b434, ensuring the stability and accuracy during the angle limiting process. At the center of the upper surface of the main rotating shaft 433, there is an adjustment shaft 435. The adjustment shaft 435 is used to connect other adjustment components. A dust-proof disc 436 is provided on the upper surface of the adjustment shaft 435. The dust-proof disc 436 can effectively isolate dust and external pollutants from entering the internal mechanical components from the rotating position, thereby extending the service life of the device. A rotating part 437 is provided on the upper surface of the dust-proof disc 436. The rotating part 437 is linked with the main rotating shaft 433, facilitating the user to adjust the specific value of the angle limit. An indicating arrow 438 is provided at the front end of the rotating part 437. The indicating arrow 438 clearly indicates the current angle setting value, further improving the usability of the device.

[0055] As Figure 7 , 8As shown in FIGS. 9 and 10, in this embodiment, the height control component 432 includes a limit groove 4324 formed at the center of the lower surface of the main rotating shaft 433. The limit groove 4324 provides space for the installation of the height control component 432. A partition plate 4325 is longitudinally provided in the limit groove 4324. The partition plate 4325 can divide the interior of the limit groove 4324 into two front and rear regions, facilitating the symmetrical arrangement of the height control component 432. On both sides of the partition plate 4325, a pointing rod 4326, a first limit block 4327, and a second limit block 4328 are successively provided from top to bottom. The lower end of the pointing rod 4326 is designed as a shoe surface. When the limit rod 4323 moves upward from the first limit block 4327, the pointing rod 4326 can push the limit rod 4323 to the side end. When the limit rod 4323 moves downward, it can be clamped to the second limit block 4328. In this way, it is realized that after pressing, the pressing and locking component 43 moves upward a certain distance to unlock the meshing connection. When pressing again, the limit rod 4323 moves upward to the upper end of the first limit block 4327 and is clamped with it. After releasing, the meshing connection is locked. A return spring 4321 is provided at the lower end of the partition plate 4325. The return spring 4321 provides the necessary return force to ensure that the limit component can quickly return to its position after being released, improving the operation efficiency. The other end of the return spring 4321 is fixedly connected to the upper surface of the fixed clamping shaft 431. Through the elastic action, the stability and return speed of the limit component are improved. A fixed collar 4322 is provided on the upper surface of the fixed clamping shaft 431 within the inner circle of the return spring 4321. The limit rod 4323 is movably installed within the fixed collar 4322. The other end of the limit rod 4323 is movably clamped and connected to the first limit block 4327. The limit rod 4323 adjusts the height of the limit groove 4324 through longitudinal sliding, and the other end is movably clamped and connected to the first limit block 4327, thereby realizing the precise control of hierarchical limiting.

[0056] As Figure 11 shown, in this embodiment, the electronic component slot 51 is formed inside the left side of the main rotating shaft 433, providing space for the installation of the battery 52, the speaker 53, and the control component 54. Sound holes 55 are formed on the upper surface. The formation of the sound holes 55 further optimizes the sound transmission effect, ensuring that the alarm sound can be promptly detected by the user.

[0057] The pressure sensing sheet 56 is installed on the counterclockwise rotation side of the limit tooth b434. Its inner sidewall is electrically connected to the control component 54, and its outer sidewall is meshed and clamped with the protruding piece 414. When the limit tooth b434 rotates abnormally due to excessive force, the sensing sheet can quickly sense the pressure change and transmit the signal to the control component 54, triggering the alarm device to promptly remind the user to stop the operation.

[0058] As Figure 1 、 2, as shown in FIGS. 3, in this embodiment, the connecting rod b44 is installed at the top of the right side wall of the main rotating shaft 433 and extends out of the connecting rod groove 415. It is fixedly connected to the upper ends on both sides of the small arm support 2 through screws 45. The connecting rod b44 is fixedly connected to the upper ends on both sides of the small arm support 2 through the connecting rod groove 415, which can provide additional supporting force for the elbow joint and enhance the stability between the angle limiting mechanism 4 and the small arm support 2 at the same time;

[0059] Fixed rings 31 are provided on the left side of the openings on the side walls of the large arm support 1 and the small arm support 2. The fixed rings 31 provide fixed positions for the straps 3, further enhancing the stability of the support device. Straps 3 are provided on the right side. The other ends of the straps 3 pass through the fixed rings 31 and are wound back to fit the surface of the middle part of the straps 3. The straps 3 can achieve the fixed effect of closely fitting the limb through Velcro, while ensuring the flexibility of adjustment;

[0060] The buffer pad a6 is fixedly installed on the inner surfaces of the large arm support 1 and the small arm support 2, which can provide a soft contact surface for the wearer's limb and reduce the discomfort caused by long-term wearing. The outer periphery of the buffer pad b46 is fitted and installed on the inner side wall of the angle limiting mechanism 4. Through the soft material and the fitting design, the buffering ability of the angle limiting mechanism 4 during the adjustment process is further enhanced, and at the same time, the extrusion feeling of the mechanical structure on the wearer's limb is effectively reduced.

[0061] In this embodiment, the large arm support 1 and the small arm support 2 are made of a lightweight and high-strength composite material. This material has excellent mechanical properties and a light weight, which can effectively reduce the burden on the wearer and ensure the durability of the device in a complex movement environment at the same time; the buffer pad a6 and the buffer pad b46 are made of medical silicone material. This material has excellent flexibility and skin-friendly properties, which can effectively reduce the extrusion feeling and friction force on the skin during wearing; the connecting rod a42 and the connecting rod b44 are made of aluminum alloy or stainless steel material. This material has high corrosion resistance and strength, can maintain stability for a long time, adapt to a variety of complex use environments, and improve the service life of the equipment.

[0062] The working principle and usage process of this technical solution are as follows: During use, the user first fixes the large arm support 1 and the small arm support 2 on the large arm and the small arm of the wearer respectively. The straps 3 pass through the fixed rings 31 on the side walls of the support and are adjusted to a state where the wearer feels comfortable and stable;

[0063] Open the anti-opening cover 411 of the angle adjustment limiting mechanism 4, rotate the adjustment shaft 435 to the target angle limit range, and the internal limit teeth a413 and limit teeth b434 engage with each other to ensure that the rotation angle of the adjustment shaft 435 is firmly limited within the set range; after confirming the adjustment is completed, cover the anti-opening cover 411 and ensure that the fastener a4112 and the fastener b412 are in the clamped state to prevent the patient from easily opening it. At this time, the angle limiting mechanism 4 will limit the range of motion of the wearer's elbow joint so that it cannot exceed the preset angle range;

[0064] During use, when the elbow joint moves to the boundary of the angle limit range, the limit teeth a413 and the limit teeth b434 come into contact and play a blocking role; if forced rotation or abnormal angle occurs, the pressure sensing sheet 56 will sense the abnormal pressure and trigger the alarm device to make a sound to remind the wearer to stop moving;

[0065] After use, loosen the strap 3 on the support body and remove the support device from the wearer's limb. After disassembly, the device part can be cleaned and disinfected to ensure the hygiene and safety of long-term use. The above process is simple and easy to operate, can effectively protect the wearer's elbow joint, limit its range of motion, and is applicable to postoperative rehabilitation, joint protection and other scenarios where the range of motion of the elbow joint needs to be limited.

[0066] The present invention has been further described above in conjunction with the embodiments, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An elbow joint position limiting anti-dropping tube device, comprising an upper arm support body (1), a lower arm support body (2), a binding belt (3), a buffer pad a (6) and a buffer pad b (46), characterized in that: Also includes: An angle limiting mechanism (4) and an over-limit alarm mechanism (5); wherein: The angle limiting mechanism (4) comprises a connecting rod a (42) fixedly mounted on the lower ends of both sides of the upper arm support body (1) by means of screws (45); an outer cover plate (41) is provided at the lower end of the connecting rod a (42); a push-locking assembly (43) is movably mounted in the outer cover plate (41); and a connecting rod b (44) is provided on the side wall of the push-locking assembly (43); The over-limit alarm mechanism (5) comprises an electronic component slot (51) and a sound hole (55) opened in the push-lock assembly (43), in which a battery (52), a speaker (53) and a control assembly (54) are fixedly installed, and a pressure sensing sheet (56) is provided around the push-lock assembly (43).

2. The elbow joint position limiting and anti-dropping tube device according to claim 1, characterized in that: The outer cover plate (41) is hollow inside, a fixed shaft hole (417) is provided at the center of the inner bottom wall, a limiting clamping tooth a (413) is provided on the circumferential side, a connecting rod groove (415) is provided on the right side of the upper part of the inner wall, an adjusting shaft hole (416) is provided at the center of the upper surface, an angle dial (418) is provided on the right side of the outer periphery of the adjusting shaft hole (416), a clamping piece b (412) is provided on the left side, and the right side is movably connected to the anti-opening cover (411) through a connecting shaft (4111), and a clamping piece a (4112) is provided on the left side of the bottom of the anti-opening cover (411), which is clamped and connected with the clamping piece b (412); The limiting latch tooth a (413) rotates clockwise to fix the protruding piece (414).

3. The elbow joint position limiting and anti-dropping tube device according to claim 1, characterized in that: The push-lock assembly (43) comprises a fixed clamping shaft (431) clamped with the fixed shaft hole (417), a height control assembly (432) being provided on the upper surface of the fixed clamping shaft (431), a main rotating shaft (433) being provided on the outer side of the height control assembly (432), a limiting clamping tooth b (434) being meshed with the limiting clamping tooth a (413) being provided on the outer periphery of the main rotating shaft (433), an adjusting shaft (435) being provided at the center of the upper surface of the main rotating shaft (433), a dustproof disc (436) being provided on the upper surface of the adjusting shaft (435), a rotating member (437) being provided on the upper surface of the dustproof disc (436), and an indicating arrow (438) being provided at the front end of the rotating member (437).

4. The elbow joint position limiting and anti-dropping tube device according to claim 3, characterized in that: The height control component (432) includes a limiting groove (4324) opened at the center of the lower surface of the main rotating shaft (433), a partition plate (4325) is longitudinally arranged in the limiting groove (4324), and a pointing rod (4326), a first limiting block (4327) and a second limiting block (4328) are arranged on both sides of the separating plate (4325) from top to bottom. A return spring (4321) is arranged at the lower end of the separating plate (4325), and the other end of the return spring (4321) is fixedly connected to the upper surface of the fixed clamping shaft (431). The inner ring of the return spring (4321) is provided with a fixed collar (4322) on the upper surface of the fixed clamping shaft (431), and a limiting rod (4323) is movably installed in the fixing collar (4322), and the other end of the limiting rod (4323) is movably connected to the first limiting block (4327).

5. The elbow joint position limiting and anti-dropping tube device according to claim 1, characterized in that: The electronic component slot (51) is provided inside the left side of the main shaft (433), and a sound hole (55) is provided on the upper surface; The pressure sensing sheet (56) is installed on the counterclockwise rotating side of the limit latch b (434), and its inner wall is electrically connected to the control component (54), and its outer wall is meshed and connected to the protruding sheet (414).

6. The elbow joint position limiting and anti-dropping tube device according to claim 1, characterized in that: The connecting rod b (44) is installed on the top of the right side wall of the main shaft (433), extends out of the connecting rod slot (415), and is fixedly connected to the upper ends of both sides of the forearm support body (2) by screws (45); The upper arm support body (1) and the lower arm support body (2) are both provided with a fixing ring (31) on the left side of the side wall opening, and a binding belt (3) on the right side, and the other end of the binding belt (3) passes through the fixing ring (31) and is wrapped around and attached to the middle surface of the binding belt (3); The buffer pad a (6) is fixedly mounted on the inner surfaces of the upper arm support body (1) and the lower arm support body (2), and the outer periphery of the buffer pad b (46) is fitted on the inner side wall of the angle limiting mechanism (4).

7. The elbow joint position limiting and anti-dropping tube device according to claim 1, characterized in that: The upper arm support body (1) and the lower arm support body (2) are made of a lightweight, high-strength composite material; the buffer pad a (6) and the buffer pad b (46) are made of a medical silicone material; and the connecting rod a (42) and the connecting rod b (44) are made of an aluminum alloy or a stainless steel material.

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