Wrist infusion auxiliary fixing device

Abstract

The utility model provides a kind of wrist infusion auxiliary fixing device, including hand clamping plate, lower arm clamping plate and angle adjusting assembly.Hand clamping plate is clamped hand by first fixed structure, lower arm clamping plate is clamped lower arm by second fixed structure, angle adjusting assembly is connected hand clamping plate and lower arm clamping plate respectively, for adjusting the angle of two.Using, locking device is unlocked, adjusting connecting rod, make and its connection hand clamping plate and lower arm clamping plate with the hand of sick child and lower arm corresponding fit, locking device is locked, then the hand clamping plate and lower arm clamping plate not connected with it are respectively with the hand of sick child and lower arm corresponding fit, finally hand clamping plate and lower arm clamping plate are fixed respectively.The utility model can be clamped and fixed from the back of hand and palm side hand and lower arm, to ensure that wrist is stable;Angle adjusting assembly can adjust the angle between hand clamping plate and lower arm clamping plate, to adapt to the physiological structure and puncture needs of different sick children, to reduce the occurrence of liquid leakage etc.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, and in particular to a wrist infusion auxiliary fixation device. Background Technology

[0002] In clinical medicine, intravenous infusion is a common treatment method, widely used in drug delivery, nutritional support, and fluid replacement. For young children, due to their young age and immature venous development, unsuitable vein access is often a challenge. In particular, veins on the back of the hand are often difficult to locate and puncture accurately due to their small diameter, indistinct course, and hidden location. Therefore, when administering intravenous infusion, medical staff may have to choose veins from other sites as alternatives.

[0003] The radial cephalic vein in the wrist is widely used for intravenous infusion in pediatrics due to its superficiality, relatively straight course, and ease of fixation. However, because the radial cephalic vein is located in the wrist, and given the large range of motion of the wrist joint and the difficulty for young children to maintain a fixed posture, needle displacement or vein slippage is common during infusion after puncture due to hand movement. This instability can lead to the following problems: First, the risk of extravasation increases. Natural wrist movements may cause the puncture site to become unstable or fluid to leak from the vein, resulting in extravasation. This not only affects the infusion effect but may also cause pain, discomfort, and even complications such as local swelling or infection in young children. Second, infusion efficiency decreases. Extravasation and unstable puncture sites increase the frequency of observation and repositioning, thus increasing the complexity of the medical procedure, the workload of nursing staff, and prolonging the infusion time. Finally, medical risks increase. Frequent manipulation may damage the vein in young children, leading to hematomas and other problems, which in turn affect the treatment outcome and the child's comfort.

[0004] Therefore, there is a need for a device that can effectively stabilize the wrist to ensure stability during radial cephalic vein infusion, thereby reducing leakage, increasing the success rate of the procedure, and improving the treatment experience and safety for young children. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the technical defects in the prior art that, due to the special location of the radial cephalic vein and the large range of wrist movement, intravenous infusion in young children is prone to needle displacement, leakage, and low infusion efficiency. Thus, a wrist infusion auxiliary fixation device that can stably fix the child's wrist, reduce the risk of leakage, and improve infusion efficiency and safety is provided.

[0006] Therefore, this utility model provides a wrist infusion auxiliary fixation device, comprising: A hand clamp includes a back hand plate and a palm hand plate arranged opposite to each other. The back hand plate and the palm hand plate can clamp the hand from the back hand side and the palm hand side, and are fixed to each other by a first fixing structure. The forearm splint includes a back plate and a palm plate arranged opposite to each other. The back plate and the palm plate can clamp the forearm from the back of the hand and the palm side, and are fixed to each other by a second fixing structure. An angle adjustment assembly includes two connecting rods rotatably connected at one end, and a locking device disposed between the two rods; one end of one connecting rod is fixedly connected to the back of the hand plate or the palm plate, and the other end of the other connecting rod is fixedly connected to the back side plate or the palm side plate; the locking device has a locked state and an unlocked state. When the locking device is in the locked state, the two connecting rods are relatively fixed, and when the locking device is in the unlocked state, the two connecting rods can rotate relative to each other.

[0007] Furthermore, one end of one of the connecting rods is provided with a pivot, the pivot extending a certain length away from the hand clamp; one end of the other connecting rod is rotatably mounted on the pivot through a through hole and can slide along the pivot axis; the locking device includes: A fixed ratchet ring is formed at one end of one of the connecting rods and is arranged around the pivot. A movable ratchet ring is formed at one end of the other connecting rod and is arranged around the through hole; the ratchet teeth of the fixed ratchet ring and the ratchet teeth of the movable ratchet ring are arranged opposite each other and can mesh with each other; The drive structure is capable of driving the movable ratchet ring to approach and engage with the fixed ratchet ring, or driving the movable ratchet ring away from and disengage from the fixed ratchet ring.

[0008] Furthermore, the driving structure includes: A return spring is sleeved and installed on the rotating shaft, with its two ends abutting against the fixed ratchet ring and the movable ratchet ring, respectively. The mounting shaft is disposed opposite to the side wall at the other end of the rotating shaft; The locking component includes two eccentric wheels and a handle fixedly connected to each of the two eccentric wheels; the two eccentric wheels are arranged opposite to each other and are rotatably connected to the two mounting shafts; operating the handle can drive the two eccentric wheels to rotate around the mounting shafts, so that the eccentric wheels apply a thrust to the movable ratchet ring or do not apply a thrust. When the eccentric wheel applies a thrust to the movable ratchet ring, the movable ratchet ring approaches and engages with the fixed ratchet ring, while simultaneously compressing the return spring; when the eccentric wheel does not apply a thrust to the movable ratchet ring, the return spring returns to its original deformation, and the movable ratchet ring moves away from and separates from the fixed ratchet ring under the action of the return spring.

[0009] Furthermore, it also includes: A wrist support pad is fixedly installed on the inner side of the palm side plate facing the hand.

[0010] Furthermore, the wrist support pad is detachably connected to the palm side plate via a Velcro structure.

[0011] Furthermore, the ends of the back of the hand plate and the back side plate that are close to each other are hinged together.

[0012] Furthermore, the ends of the palm plate and the palm side plate closest to each other are hinged together.

[0013] Furthermore, the palm plate is curved to fit snugly against the palm of the hand.

[0014] Furthermore, both the first fixing structure and the second fixing structure are straps.

[0015] Furthermore, it also includes: The pad is made of a soft material and can be detachably connected to the inner side of at least one of the back of the hand plate, the palm plate, the back side plate, and the palm side plate.

[0016] The technical solution provided by this utility model has the following advantages: This utility model discloses a wrist infusion auxiliary fixation device, comprising a hand clamp, a forearm clamp, and an angle adjustment assembly. The hand clamp includes a back plate and a palm plate arranged opposite each other, which can clamp the hand from the back and palm sides and are fixed to each other by a first fixing structure. The forearm clamp includes a back plate and a palm plate arranged opposite each other, which can clamp the forearm from the back and palm sides and are fixed to each other by a second fixing structure. The angle adjustment assembly includes two connecting rods rotatably connected at one end and a locking device disposed between them. The other end of one connecting rod is fixedly connected to the back plate or the palm plate, and the other end of the other connecting rod is fixedly connected to the back plate or the palm plate. The locking device has a locked state and an unlocked state. When the locking device is in the locked state, the two connecting rods are fixed relative to each other. When the locking device is in the unlocked state, the two connecting rods can rotate relative to each other.

[0017] In use, the wrist infusion auxiliary fixation device of this utility model is first adjusted to the unlocked state by adjusting the locking device of the angle adjustment component, and then adjusting the connecting rod so that the hand clamp (back of hand plate or palm plate) and forearm clamp (back side plate or palm side plate) connected to the connecting rod are aligned with the position of the child's hand and forearm, and then fitted to the child's hand and forearm accordingly; then the locking device of the angle adjustment component is operated to switch it to the locked state, and then the hand clamp (palm plate or back of hand plate) and forearm clamp (palm side plate or back side plate) not connected to the connecting rod are fitted to the child's hand and forearm respectively, and fixed to the child's hand and forearm respectively by the first fixation structure and the second fixation structure.

[0018] This utility model discloses a wrist infusion support and fixation device. Through the cooperation of a hand splint and a forearm splint, it can clamp and fix the hand and forearm from the back and palm sides, ensuring wrist stability. The included angle adjustment component allows the angle between the hand splint and forearm splint to be adjusted according to actual needs, adapting to the physiological structure of different children and the requirements of puncture procedures. This effectively reduces needle displacement or blood vessel slippage caused by hand movements during infusion, lowers the risk of extravasation, and thus improves the safety and efficiency of infusion, enhancing the treatment experience for young children. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the prior art or specific embodiments of this utility model, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0020] Figure 1 This is a schematic diagram of the overall structure of the wrist infusion auxiliary fixation device of this utility model.

[0021] Figure 2 yes Figure 1 Another stereoscopic view.

[0022] Figure 3 This is an exploded view of the wrist infusion auxiliary fixation device of this utility model.

[0023] Figure 4 yes Figure 3 Enlarged structural diagram of part A.

[0024] Reference numerals: 1. Hand splint; 11. Back of hand splint; 12. Palm splint; 2. Forearm splint; 21. Back side splint; 22. Palm side splint; 23. Wrist support pad; 3. Angle adjustment assembly; 31. Connecting rod; 310. Through hole; 32. Rotating shaft; 33. Fixed ratchet ring; 34. Movable ratchet ring; 35. Return spring; 36. Mounting shaft; 37. Locking element; 371. Eccentric wheel; 372. Handle; 4. Hinge; 5. Strap; 6. Pad. Detailed Implementation

[0025] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0026] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0027] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0028] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] This embodiment provides a wrist-based intravenous infusion support and fixation device, such as... Figure 1-4As shown, the device includes: a hand clamp 1, a forearm clamp 2, and an angle adjustment assembly 3; the hand clamp 1 includes a backhand plate 11 and a palm plate 12 arranged opposite to each other, the backhand plate 11 and the palm plate 12 being able to clamp the hand from the back and palm sides, and being fixed to each other by a first fixing structure; the forearm clamp 2 includes a back side plate 21 and a palm side plate 22 arranged opposite to each other, the back side plate 21 and the palm side plate 22 being able to clamp the forearm from the back and palm sides, and being fixed to each other by a second fixing structure; the angle adjustment assembly 3 includes two... The device includes a connecting rod 31 rotatably connected at one end, and a locking device disposed between the two; one end of the connecting rod 31 is fixedly connected to the back plate 11 or the palm plate 12, and the other end of the connecting rod 31 is fixedly connected to the back side plate 21 or the palm side plate 22; the locking device has a locked state and an unlocked state. When the locking device is in the locked state, the two connecting rods 31 are relatively fixed, and when the locking device is in the unlocked state, the two connecting rods 31 can rotate relative to each other.

[0030] In this embodiment of the wrist infusion auxiliary fixation device, one end of a connecting rod 31 is fixedly connected to the back plate 11 or the palm plate 12, and the other end of the connecting rod 31 is fixedly connected to the back plate 21 or the palm plate 22. For example, one end of the connecting rod 31 can be connected to the back plate 11, and the other end of the connecting rod 31 can be connected to the palm plate 22. Taking one end of the connecting rod 31 connected to the back of the hand plate 11 and the other end of the connecting rod 31 connected to the palm side plate 22 as an example, when using it, first adjust the locking device of the angle adjustment component 3 to the unlocked state, adjust the connecting rod 31 so that the hand clamp (back of the hand plate 11) and the forearm clamp (palm side plate 22) connected to the connecting rod 31 match the position of the child's hand and forearm, and then fit them to the child's hand and forearm accordingly; operate the locking device of the angle adjustment component 3 to switch it to the locked state, and then fit the hand clamp (palm plate 12) and the forearm clamp (back side plate 21) not connected to the connecting rod 31 to the child's hand and forearm respectively, and fix them to the child's hand and forearm respectively through the first fixing structure and the second fixing structure.

[0031] The wrist infusion support and fixation device of this embodiment, through the cooperation of the hand splint 1 and the forearm splint 2, can clamp and fix the hand and forearm from the back and palm sides, ensuring wrist stability. The angle adjustment component 3 allows the angle between the hand splint 1 and the forearm splint 2 to be adjusted according to actual needs, to adapt to the physiological structure of different children and the needs of puncture operation. In this way, it can effectively reduce needle displacement or blood vessel slippage caused by hand movement during infusion, reduce the risk of leakage, thereby improving the safety and efficiency of infusion and improving the treatment experience of young children.

[0032] The wrist infusion support and fixation device in this embodiment, such as Figure 3 , Figure 4 As shown, one end of one of the connecting rods 31 is provided with a rotating shaft 32, which extends a certain length away from the hand clamp 1; one end of the other connecting rod 31 is rotatably mounted on the rotating shaft 32 through a through hole 310 and can slide along the axial direction of the rotating shaft 32; the locking device includes a fixed ratchet ring 33, a movable ratchet ring 34, and a driving structure; the fixed ratchet ring 33 is formed at one end of one of the connecting rods 31 and is arranged around the rotating shaft 32; the movable ratchet ring 34 is formed at one end of the other connecting rod 31 and is arranged around the through hole 310; the ratchet teeth of the fixed ratchet ring 33 and the ratchet teeth of the movable ratchet ring 34 are arranged opposite each other and can mesh with each other; the driving structure can drive the movable ratchet ring 34 to approach the fixed ratchet ring 33 and mesh with it, or drive the movable ratchet ring 34 away from the fixed ratchet ring 33 and separate it from it.

[0033] The wrist infusion support and fixation device of this embodiment, through the cooperation of the rotating shaft 32 and the through hole 310, allows the two connecting rods 31 to be rotatably connected while sliding axially, thereby achieving flexible angle adjustment. The fixed ratchet ring 33 and the movable ratchet ring 34 ensure that after angle adjustment, a stable lock can be achieved through ratchet engagement, preventing unexpected changes in angle due to external forces during infusion. This not only improves the stability and reliability of the device but also provides medical personnel with a convenient operating method, reducing adjustment and fixation time.

[0034] The wrist infusion support and fixation device in this embodiment, such as Figure 4 As shown, the drive structure includes a return spring 35, a mounting shaft 36, and a locking member 37. The return spring 35 is sleeved on the rotating shaft 32, and its two ends abut against the fixed ratchet ring 33 and the movable ratchet ring 34, respectively. The mounting shaft 36 is disposed opposite to the side wall of the other end of the rotating shaft 32. The locking member 37 includes two eccentric wheels 371 and a handle 372 fixedly connected to the two eccentric wheels 371. The two eccentric wheels 371 are disposed opposite to each other and rotatably connected to the two mounting shafts 36, respectively. Operating the handle 372 can drive the two fixed ratchet rings 34. The eccentric wheel 371 rotates around the mounting shaft 36 to apply a thrust to the movable ratchet ring 34 or not; when the eccentric wheel 371 applies a thrust to the movable ratchet ring 34, the movable ratchet ring 34 approaches and engages with the fixed ratchet ring 33, while compressing the return spring 35; when the eccentric wheel 371 does not apply a thrust to the movable ratchet ring 34, the return spring 35 returns to its original deformation, and the movable ratchet ring 34 moves away from and separates from the fixed ratchet ring 33 under the action of the return spring 35.

[0035] In this embodiment of the wrist infusion auxiliary fixation device, the eccentric wheel 371 can be provided with a mounting hole, so as to be installed on the mounting shaft 36; the handle 372 can be lifted and pressed down. For ease of use, it can be designed such that when the handle 372 is pressed down, the eccentric wheel 371 applies a pushing force to the movable ratchet ring 34 (the outer side of the eccentric wheel 371 away from the center line of the mounting hole pushes against the movable ratchet ring 34), and the locking device is in a locked state; when the handle 372 is lifted up, the eccentric wheel 371 does not apply a pushing force to the movable ratchet ring 34, and the locking device is in an unlocked state.

[0036] In this embodiment, the engagement and disengagement of the movable ratchet ring 34 and the fixed ratchet ring 33 are achieved through the cooperation of the return spring 35, the mounting shaft 36, the eccentric wheel 371, and the handle 372. This design makes angle adjustment and locking operations simpler and faster. Medical staff can easily adjust and fix the angle using the handle, improving operational efficiency and reducing discomfort for the child.

[0037] The wrist infusion support and fixation device in this embodiment, such as Figure 2 As shown, it also includes a wrist support pad 23, which is fixedly installed on the inner side of the palm side plate 22 facing the hand.

[0038] In this embodiment, the wrist support pad 23 can be made of materials such as silicone, memory foam, or polyurethane foam. By fixing the wrist support pad 23 to the palmar side plate 22, it can provide additional support and cushioning for the child's wrist, reducing wrist pressure and discomfort caused by prolonged fixation. This design not only improves the child's comfort but also better stabilizes the wrist, reducing device slippage or displacement due to insufficient support.

[0039] In this embodiment of the wrist infusion auxiliary fixation device, the wrist support pad 23 is detachably connected to the palm side plate 22 via a Velcro structure.

[0040] In this embodiment, a Velcro structure enables a detachable connection between the wrist support pad 23 and the palm side plate 22, making the installation and replacement of the wrist support pad 23 more convenient and allowing medical staff to select the appropriate support pad material or thickness according to the specific needs of the child. At the same time, the detachable design also facilitates cleaning and disinfection, improving the hygiene and durability of the device.

[0041] The wrist infusion support and fixation device in this embodiment, such as Figure 3 As shown, the ends of the back plate 11 and the back side plate 21 that are close to each other are hinged together by a hinge 4.

[0042] The wrist infusion auxiliary fixation device of this embodiment is characterized in that the palm plate 12 and the palm side plate 22 are connected by a hinge 4 at their ends closest to each other.

[0043] The wrist infusion support and fixation device in this embodiment, such as Figure 3 As shown, the palm plate 12 is arc-shaped, which can fit the palm of the hand.

[0044] The wrist infusion auxiliary fixation device of this embodiment has a palm plate 12 designed to fit the palm in an arc shape, which can better adapt to the physiological curvature of the palm, improve the fit of the device, enhance the fit and comfort of wearing, reduce slippage and pressure, enhance the stability of fixation, and make it easier for children to accept and cooperate.

[0045] In this embodiment of the wrist infusion auxiliary fixation device, both the first fixation structure and the second fixation structure are straps 5.

[0046] In this embodiment, the wrist infusion support device features a Velcro strap 5. One end of the strap can be fixed to the hand splint 1 or forearm splint 2, while the other end can be wrapped around the splint 1 or forearm splint 2 and secured with the Velcro strap. Using the strap 5 as both the first and second fixation structures, its adjustability allows for flexible adjustments based on the size of the child's hand and forearm, ensuring the device's stability and comfort. This design not only improves the device's applicability but also facilitates quick fixation and adjustment by medical personnel, reducing operation time, increasing work efficiency, and making it suitable for various clinical environments.

[0047] The wrist infusion support and fixation device in this embodiment, such as Figure 3 As shown, it also includes a pad 6, which is made of soft material and can be detachably connected to the inner side of at least one of the back of the hand plate 11, the palm plate 12, the back side plate 21, and the palm side plate 22.

[0048] In this embodiment, the wrist infusion support device uses a pad 6 made of materials such as silicone, soft knitted material, memory foam, or polyurethane foam. The pad 6 is detachably connected via Velcro. The soft pad 6 is detachably connected to the inner surfaces of the back of the hand plate 11, the palm plate 12, the dorsal side plate 21, and the palmar side plate 22, providing additional cushioning and protection for the child's hand and forearm, reducing skin friction and discomfort. Simultaneously, the detachable design of the pad facilitates cleaning and replacement, improving the hygiene and durability of the device, further ensuring the child's comfort and safety.

[0049] In this embodiment of the wrist infusion auxiliary fixation device, the hand splint 1, the forearm splint 2, and the angle adjustment component 3 can all be made of plastic material, thereby reducing the overall weight and improving wearing comfort.

[0050] The wrist-based intravenous infusion support and fixation device of this embodiment is used as follows: The wrist support pad 23 is fixed to the inner side of the palm side plate 22 by Velcro or the like, and the pad 6 is installed on the inner side of the back of the hand plate 11, the palm plate 12, the back side plate 21, and the palm side plate 22 by Velcro or the like. Lift handle 372 to unlock the locking device. Adjust connecting rod 31 so that the back of hand plate 11, palm plate 12, back side plate 21, and palm side plate 22 are naturally matched with the child's hand and forearm. After ensuring that the position is appropriate, gently place the child's hand and forearm on the corresponding splints so that the back of hand plate 11 and palm plate 12 fit against the hand, and the back side plate 21 and palm side plate 22 fit against the forearm, ensuring that the fingers are not pinched and the hand is naturally relaxed. Press handle 372 to switch the locking device to the locked state, ensuring that the connecting rod 31 is fixed and the angle is stable; then use straps 5 to tie and fix the back of the hand plate 11 and the palm plate 12, the back side plate 21 and the palm side plate 22 respectively; after all fixation is completed, thoroughly check all straps and fixation structures to confirm that there is no loosening, displacement or obvious pressure, and ensure that the child's hand and forearm are safe and stable.

[0051] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. A wrist infusion auxiliary fixation device, characterized in that, include: The hand clamp (1) includes a back plate (11) and a palm plate (12) arranged opposite to each other. The back plate (11) and the palm plate (12) can clamp the hand from the back side and the palm side, and are fixed to each other by a first fixing structure. The forearm clamp (2) includes a back plate (21) and a palm plate (22) arranged opposite to each other. The back plate (21) and the palm plate (22) can clamp the forearm from the back of the hand and the palm of the hand, and are fixed to each other by a second fixing structure. Angle adjustment assembly (3) includes two connecting rods (31) that are rotatably connected at one end, and a locking device disposed between the two; One end of one of the connecting rods (31) is fixedly connected to the back of the hand plate (11) or the palm plate (12), and the other end of the connecting rod (31) is fixedly connected to the back side plate (21) or the palm side plate (22). The locking device has a locked state and an unlocked state. When the locking device is in the locked state, the two connecting rods (31) are fixed relative to each other. When the locking device is in the unlocked state, the two connecting rods (31) can rotate relative to each other.

2. The wrist infusion auxiliary fixation device according to claim 1, characterized in that, One end of one of the connecting rods (31) is provided with a pivot (32), the pivot (32) extending a certain length away from the hand clamp (1); one end of the other connecting rod (31) is rotatably mounted on the pivot (32) through a through hole (310), and can slide along the axial direction of the pivot (32); the locking device includes: A fixed ratchet ring (33) is formed at one end of one of the connecting rods (31) and is arranged around the pivot (32); The movable ratchet ring (34) forms one end of the other connecting rod (31) and is arranged around the through hole (310); the ratchet teeth of the fixed ratchet ring (33) and the ratchet teeth of the movable ratchet ring (34) are arranged opposite to each other and can mesh with each other; The drive structure is capable of driving the movable ratchet ring (34) to approach and engage with the fixed ratchet ring (33), or driving the movable ratchet ring (34) away from and separate from the fixed ratchet ring (33).

3. The wrist infusion auxiliary fixation device according to claim 2, characterized in that, The driving structure includes: A return spring (35) is sleeved on the rotating shaft (32), and its two ends abut against the fixed ratchet ring (33) and the movable ratchet ring (34) respectively; The mounting shaft (36) is disposed opposite to the side wall at the other end of the rotating shaft (32); The locking element (37) includes two eccentric wheels (371) and a handle (372) fixedly connected to each of the two eccentric wheels (371); the two eccentric wheels (371) are arranged opposite to each other and are rotatably connected to the two mounting shafts (36); operating the handle (372) can drive the two eccentric wheels (371) to rotate around the mounting shafts (36) so that the eccentric wheels (371) apply a thrust or not a thrust to the movable ratchet ring (34); When the eccentric wheel (371) applies a thrust to the movable ratchet ring (34), the movable ratchet ring (34) approaches and engages with the fixed ratchet ring (33), while compressing the return spring (35); when the eccentric wheel (371) does not apply a thrust to the movable ratchet ring (34), the return spring (35) returns to its original deformation, and the movable ratchet ring (34) moves away from and separates from the fixed ratchet ring (33) under the action of the return spring (35).

4. The wrist infusion auxiliary fixation device according to claim 1, characterized in that, Also includes: A wrist support pad (23) is fixedly installed on the inner side of the palm side plate (22) facing the hand.

5. The wrist infusion auxiliary fixation device according to claim 4, characterized in that, The wrist support pad (23) is detachably connected to the palm side plate (22) via a Velcro structure.

6. The wrist infusion auxiliary fixation device according to claim 1, characterized in that, The back of the hand plate (11) and the back side plate (21) are hinged together at their closest points by a hinge (4).

7. The wrist infusion auxiliary fixation device according to claim 1, characterized in that, The palm plate (12) and the palm side plate (22) are hinged together at their closest points by a hinge (4).

8. The wrist infusion auxiliary fixation device according to claim 1, characterized in that, The palm plate (12) is in the shape of an arc that can fit the palm of the hand.

9. The wrist infusion auxiliary fixation device according to claim 1, characterized in that, Both the first fixing structure and the second fixing structure are straps (5).

10. The wrist infusion auxiliary fixation device according to claim 1, characterized in that, Also includes: The pad (6) is made of soft material and can be detachably connected to the inner side of at least one of the back of the hand plate (11), the palm plate (12), the back side plate (21), and the palm side plate (22).

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