Needle fixing mechanical clamp for animal infusion

Abstract

The invention belongs to the field of infusion auxiliary devices, and particularly relates to a needle fixing mechanical clamp for animal infusion, which comprises two fixing clamp rings distributed in parallel, and the two fixing clamp rings are connected through a plurality of connecting beams; the fixed clamping ring comprises two side clamping plate structures which are symmetrically distributed, and the two side clamping plate structures are detachably connected; the side clamping plate structure comprises an arc-shaped clamping plate and an inner adaptive pad, and the inner adaptive pad is laid on the inner surface of the arc-shaped clamping plate. The inner adaptive cushion comprises an air bag cushion, and the air bag cushion is composed of a plurality of unit air bag cushions; a plurality of unit air bag cushions at one position or a plurality of positions are inflated and expanded, so that the air bag cushions are positioned on the limbs of the animal, and stable limiting is carried out; on the basis that it is guaranteed that animal limbs are stably limited, opening of blood vessels for main infusion is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of infusion auxiliary devices, in particular to a needle fixing mechanical clamp for animal infusion. BACKGROUND

[0002] Animal infusion is a basic and essential technical means in veterinary clinical treatment and nursing, and is widely used in multiple scenes such as fluid replacement, drug administration, nutritional support and anesthesia maintenance. Unlike human patients, animals cannot cooperate through language communication during infusion, and their behavior is unpredictable. Whether it is a domestic pet (such as a dog or a cat), or an economic animal (such as a cow or a horse), when they are subjected to needle pain, environmental interference or fear, they are prone to stress reactions such as restlessness and struggle, which poses a great challenge to the smooth progress of infusion operations.

[0003] If a needle fixing device is not used or is not used effectively, a series of problems will be caused. First, the needle is prone to displacement, slipping or puncturing the blood vessel wall (i.e. "puncturing the blood vessel") due to the slight movement of the animal, causing the drug solution to leak into the subcutaneous tissue, causing local swelling, pain and even tissue necrosis. Second, frequent restocking not only increases the pain and stress of the animal, but also increases the workload of the veterinary personnel, and reduces the efficiency of diagnosis and treatment. More importantly, in the rescue of critical cases or during long-term surgical anesthesia, the interruption of the infusion channel may directly affect the timely delivery of drugs and fluids, posing a threat to the treatment effect and even the life safety of the animal.

[0004] Currently, the needles used for animal infusion mainly include disposable intravenous indwelling needles, etc. To fix these needles, the clinic usually relies on traditional methods, such as using medical tape to directly paste the needle handle and the infusion tube connected thereto on the animal's skin or hair. Some improved solutions may be supplemented with elastic bandages for wrapping and fixing; in addition, there are some simple fixing devices on the market, which are usually plastic clamps with adhesive bases, providing some auxiliary support by clamping the infusion tube.

[0005] The core of these existing fixing methods still relies on sticking and binding, and the fixing effect is significantly affected by the animal's hair grease, cleanliness and activity, and is essentially a passive fixing method, which has limited stability and reliability; if the binding is too tight, it will also cause the blood flow to slow down, affecting the infusion. SUMMARY

[0006] In view of the fact that the core of the existing fixing method still relies on sticking and binding, and the fixing effect is significantly affected by the animal's hair grease, cleanliness and activity, and is essentially a passive fixing method, which has limited stability and reliability; if the binding is too tight, it will also cause the blood flow to slow down, affecting the infusion. To achieve the above purpose, the present application provides the following technical solutions: The utility model provides a kind of needle fixing mechanical clamp for animal infusion, including two parallel distribution fixed clamps ring, multiple connecting beams are connected between the two fixed clamps ring;Fixed clamp ring includes two symmetrically distributed side clamping plate structures, and two side clamping plate structures are detachably connected;Side clamping plate structure includes arc clamping plate and inner adaptive pad, and inner adaptive pad is laid on the inner surface of arc clamping plate;Inner adaptive pad includes air bag pad, and air bag pad is composed of multiple unit air bag pads;By being inflated and swelling for multiple unit air bag pads in one place or multiple places, positioning to animal limbs is achieved, and stable location is carried out;According to animal infusion point, two symmetrically distributed side clamping plate structures are clamped on the limbs of animal from both sides, two fixed clamps ring are assembled on the both sides of infusion point, the area between two fixed clamps ring is demarcated as stable area, after two side clamping plate structures are clamped on the limbs of animal by fixed clamps ring, according to the distribution of blood vessels of animal, especially main infusion blood vessel, adaptively inflated and swollen for multiple unit air bag pads in one place or multiple places, positioning to animal limbs is achieved to avoid main infusion blood vessel;Further, on the basis of guaranteeing stable location of animal limbs, main infusion blood vessel is avoided.

[0007] Further, the connecting beam includes a connecting rod one and a connecting rod two, the connecting rod one and the connecting rod two are connected through a ball and a support seat, the ball is fixed at the end of the connecting rod one, and the support seat is fixed at the end of the connecting rod two; A limiting pin is arranged on the support seat outside the ball to limit the ball and the support seat. According to the shape of the animal limbs around the animal infusion point, the limiting pin is released to limit the ball and the support seat, the connecting rod one and the connecting rod two are adjusted through the ball and the support seat to adapt to the shape bending change of the animal limbs, the two fixed clamps ring are assembled on the both sides of the infusion point, the area between the two fixed clamps ring is demarcated as a stable area, and the stability and reliability are improved.

[0008] Further, the arc-shaped clamping plate includes an arc-shaped plate body, a connecting plate is fixed at the end of the arc-shaped plate body, and the connecting plate and the arc-shaped plate body are integrally connected; A plurality of mounting holes are formed in the connecting plate, and the mounting holes are used to detachably connect the two side clamping plate structures; The plurality of mounting holes are equally spaced along the connecting plate.

[0009] Further, the arc-shaped clamping plate further includes a plurality of gas injection pipe structures, and the plurality of gas injection pipe structures are arrayed along the arc-shaped plate body; The plurality of gas injection pipe structures correspond to the plurality of unit air bag pads one by one.

[0010] Optimally, the gas injection pipe structure includes a guide cylinder and an inner push piece, the guide cylinder penetrates through the arc-shaped plate body and extends into the unit air bag pad; The inner push piece is movably inserted in the guide cylinder.

[0011] The guide cylinder is open at both ends; a gas delivery pipe is arranged at one side of the guide cylinder, one end of the gas delivery pipe is communicated with the outside, and the other end is communicated with the inside of the end of the guide cylinder; a one-way air inlet valve is arranged at the joint of the guide cylinder and the gas delivery pipe.

[0012] The inner pushing piece comprises a piston and an inner penetrating rod, the piston and the inner penetrating rod are fixedly connected in one piece; the center lines of the piston and the inner penetrating rod are on the same straight line; the piston is movably penetrated in the guide cylinder.

[0013] The inner pushing piece further comprises a limiting ring, the limiting ring is fixedly sleeved on the inner penetrating rod, the inner penetrating rod is provided with a pushing disc at an end away from the piston, and the pushing disc and the inner penetrating rod are rotationally connected; the center lines of the pushing disc and the inner penetrating rod are on the same straight line; a pull ring is fixed on the pushing disc, and a limiting screw thread is formed on the outside of the pushing disc.

[0014] A spring is sleeved on the inner penetrating rod, and the spring does not contact the inner penetrating rod; one end of the spring is fixed on the limiting ring, and the other end is connected to the arc-shaped plate body.

[0015] Further, the inner adaptive pad further comprises a supporting arc-shaped plate, the air bag pad is connected to the inner side of the supporting arc-shaped plate, a plurality of cavities are formed on the supporting arc-shaped plate, and the plurality of cavities and the plurality of unit air bag pads are in one-to-one correspondence; the cavities are communicated with the unit air bag pads.

[0016] Compared with the prior art, the needle fixing mechanical clamp for animal infusion can achieve the following effects: 1. According to the animal infusion point, two symmetrically distributed side clamping plate structures are clamped on the limbs of the animal from both sides, two fixed clamping rings are assembled on both sides of the infusion point, the area between the two fixed clamping rings is defined as a stable area, and after the two side clamping plate structures are clamped on the limbs of the animal by the fixed clamping rings, according to the distribution of blood vessels of the animal, especially the main infusion blood vessels, the adaptive unit air bag pads are inflated and expanded at one or multiple places, so as to avoid positioning the main infusion blood vessels on the limbs of the animal; further, the main infusion blood vessels are avoided on the basis of ensuring the stable positioning of the limbs of the animal. 2. According to the shape of the limbs of the animal around the animal infusion point, the limiting of the limiting pin on the limiting ball and the supporting seat is released, the angle between the connecting rod one and the connecting rod two is adjusted through the ball and the supporting seat, the shape bending change of the limbs of the animal is realized, the two fixed clamping rings are assembled on both sides of the infusion point, the area between the two fixed clamping rings is defined as a stable area, and the stability and reliability are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0018] Figure 1 Structure diagram of the needle fixing mechanical clamp for animal infusion in an embodiment of the present application; Figure 2 Structure diagram of the fixed clamp ring in an embodiment of the present application; Figure 3 Structure diagram of the side clamp plate structure in an embodiment of the present application; Figure 4 Structure diagram of the arc-shaped clamp plate in an embodiment of the present application; Figure 5 Structure diagram of Figure 4 the arc-shaped clamp plate after being turned over; Figure 6 Structure diagram of the inner adaptive pad in an embodiment of the present application; Figure 7 Structure diagram of the gas injection tube structure in an embodiment of the present application; Figure 8 Exploded structure diagram of the gas injection tube structure in an embodiment of the present application; Figure 9 Structure diagram of the guide cylinder in an embodiment of the present application; Figure 10 Structure diagram of the inner pushing piece in an embodiment of the present application.

[0019] In the drawings, the components represented by the respective reference numerals are listed as follows: Fixed clamp ring 100, connecting beam 200, side clamp plate structure 300; arc-shaped clamp plate 310, inner adaptive pad 320, arc-shaped plate body 3101, gas injection tube structure 3102, connecting plate 3103, mounting hole 3104, guide cylinder 3105, inner pushing piece 3106, gas delivery tube 3107, piston 3108, limiting ring 3109, spring 3110, inner penetrating rod 3111, pushing disc 3112, pull ring 3113, supporting arc-shaped plate 3201, air bag pad 3202, cavity 3203. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be further described in detail in combination with specific embodiments. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0021] In the embodiments of the present application, asFigures 1-6 As shown: A mechanical clamp for fixing needles for animal infusion includes two parallel clamping rings 100, which are connected by a plurality of connecting beams 200; each clamping ring 100 includes two symmetrically distributed side clamping plate structures 300, which are detachably connected. It should be noted that the number of fixing rings 100 can be three, four, or even more, in addition to two. The specific number is not limited, as long as it can satisfy the requirement that multiple fixing rings 100 form a stable area. Here, it is preferred to use two fixing rings 100. Therefore, based on the animal infusion point, two symmetrically distributed side clamp structures 300 clamp the animal's limbs from both sides, completing the assembly of two fixed clamps 100 on both sides of the infusion point, thereby defining the area between the two fixed clamps 100 as a stable area, with high stability and high reliability. The detachable connection between the two side clamping plate structures 300 can be achieved through bolts, clips, or fixing pins, etc., and the specific structure is not limited; all of these are existing technologies, and detailed structures can be found in existing literature and journals, and can also be purchased directly on the market, or assembled from purchased parts, etc.; these are not the technologies to be protected by this invention, and will not be described in detail here, nor are they shown in the accompanying drawings. The side clamp structure 300 includes an arc-shaped clamp 310 and an internal adaptation pad 320, which is laid on the inner surface of the arc-shaped clamp 310. The internal adaptation pad 320 includes an air bladder pad 3202, which is composed of multiple unit air bladder pads. By inflating multiple or multiple unit air bladder pads at one location, the pads can be positioned on the animal's limbs for stable restraint. Therefore, after clamping the two side clamp structures 300 onto the animal's limb, the system adapts to the distribution of the animal's blood vessels, especially the main infusion vessels, by inflating multiple or multiple unit airbags in one place to avoid the main infusion vessels and position them on the animal's limb; thus, it achieves the goal of avoiding opening the main infusion vessels while ensuring stable positioning of the animal's limb.

[0022] In summary, existing fixation methods still rely on adhesives and binding, and their effectiveness is significantly affected by the animal's fur oil, cleanliness, and activity level. Essentially, they are passive fixations with limited stability and reliability. Furthermore, excessively tight binding can slow blood flow and affect intravenous infusion. This application addresses these issues by: According to the animal infusion point, two symmetrically distributed side clamping plate structures 300 are clamped on the limbs of the animal from both sides, the two fixed clamping rings 100 are assembled on both sides of the infusion point, the area between the two fixed clamping rings 100 is delimited as a stable area, and after the two side clamping plate structures 300 are clamped on the limbs of the animal by the fixed clamping ring 100, the blood vessel distribution of the animal is adapted, especially the main infusion blood vessels, to adapt one to multiple or multiple to multiple unit air bag pads to inflate and expand, so as to avoid positioning the main infusion blood vessels on the limbs of the animal.

[0023] In another embodiment of the present application, as shown in Figure 1 The connecting rod one and the connecting rod two are hingedly connected through a ball and a support seat, the ball is fixed at the end of the connecting rod one, and the support seat is fixed at the end of the connecting rod two. A limiting pin is arranged on the support seat outside the ball to limit the ball and the support seat.

[0024] Therefore, according to the shape of the limbs of the animal around the animal infusion point, the limiting pin is removed from the limiting of the ball and the support seat, the connecting rod one and the connecting rod two are adjusted in angle through the ball and the support seat, the shape bending change of the limbs of the animal is adapted, the two fixed clamping rings 100 are assembled on both sides of the infusion point, the area between the two fixed clamping rings 100 is delimited as a stable area, and the stability and reliability are improved.

[0025] In another embodiment of the present application, as shown in Figures 3-5 The arc-shaped clamping plate 310 includes an arc-shaped plate body 3101, one connecting plate 3103 is fixed at the end of the arc-shaped plate body 3101, and the connecting plate 3103 and the arc-shaped plate body 3101 are integrally fixedly connected.

[0026] Further, as shown in Figures 3-6 The arc-shaped clamping plate 310 further includes a plurality of gas injection pipe structures 3102, and the plurality of gas injection pipe structures 3102 are arrayed along the arc-shaped plate body 3101.

[0027] Therefore, through the inflation and expansion of the one-to-multiple or multiple-to-multiple unit air bag pads by the gas injection pipe structure 3102, the main infusion blood vessels are positioned on the limbs of the animal; and the main infusion blood vessels are avoided on the basis of stably positioning the limbs of the animal.

[0028] In another embodiment of the present application, as shown in Figure 5 , Figure 7 and Figure 8 : the gas injection tube structure 3102 includes a guide cylinder 3105 and an inner pushing piece 3106, the guide cylinder 3105 penetrates through the arc plate body 3101 and extends into the inside of the unit air bag pad; the inner pushing piece 3106 movably penetrates in the inside of the guide cylinder 3105.

[0029] The material of the unit air bag pad is the prior art, the detailed structure can be known from the existing literature periodicals, and can also be directly purchased on the market, etc.; it is not the protection of the present application, and will not be described in detail here.

[0030] As shown in Figures 7-9 : the guide cylinder 3105 is open at both ends; a gas supply pipe 3107 is arranged on one side of the guide cylinder 3105, one end of the gas supply pipe 3107 is communicated with the outside, and the other end is communicated with the inside of the end of the guide cylinder 3105; a one-way air inlet valve is installed at the connection between the guide cylinder 3105 and the gas supply pipe 3107.

[0031] The one-way air inlet valve is the prior art, the detailed structure can be known from the existing literature periodicals, and can also be directly purchased on the market, or the parts can be purchased on the market to be composed, etc.; it is not the protection of the present application, and will not be described in detail here, nor is it drawn in the attached drawings.

[0032] As shown in Figures 7-10 : the inner pushing piece 3106 includes a piston 3108 and an inner penetrating rod 3111, the piston 3108 and the inner penetrating rod 3111 are integrally fixedly connected; the columnar center lines of the piston 3108 and the inner penetrating rod 3111 adopt the same straight line; the piston 3108 movably penetrates in the inside of the guide cylinder 3105.

[0033] Therefore, the inner penetrating rod 3111 is used to drive the piston 3108 to move back and forth in the inside of the guide cylinder 3105, to complete the inflation of the multiple unit air bag pads in one place or multiple unit air bag pads in multiple places through the gas injection tube structure 3102, to achieve the positioning on the animal limbs by avoiding the main infusion blood vessels; to avoid the main infusion blood vessels on the basis of ensuring the stable positioning of the animal limbs.

[0034] The sealing mode of the piston 3108 in the inside of the guide cylinder 3105 is the prior art, the detailed structure can be known from the existing literature periodicals, and can also be directly purchased on the market, or the parts can be purchased on the market to be composed, etc.; it is not the protection of the present application, and will not be described in detail here, nor is it drawn in the attached drawings.

[0035] As shown in Figure 10As shown: the inner push piece 3106 further includes a limiting ring 3109, the limiting ring 3109 is sleeved and fixed on the inner insertion rod 3111, the inner insertion rod 3111 is provided with a push disc 3112 at one end away from the piston 3108, the push disc 3112 and the inner insertion rod 3111 are rotationally connected; the column of the push disc 3112 and the inner insertion rod 3111 is on the same straight line; the push disc 3112 is fixed with a pull ring 3113, and the push disc 3112 is provided with a limiting screw thread outside.

[0036] As shown: Figure 10 As shown: the inner insertion rod 3111 is sleeved with a spring 3110, the spring 3110 does not contact the inner insertion rod 3111; one end of the spring 3110 is fixed on the limiting ring 3109, and the other end is connected to the arc-shaped plate body 3101.

[0037] Therefore, rotating the push disc 3112, the push disc 3112 is released from the limiting of the arc-shaped plate body 3101, the inner insertion rod 3111 and the push disc 3112 are pulled out from the inside of the guide cylinder 3105, the inner insertion rod 3111 drives the piston 3108 to move back and forth in the guide cylinder 3105, the spring 3110 will follow the periodic elastic stretching and contraction in this process, the inflation of the multiple unit air bag pads in one place or multiple places through the air injection pipe structure 3102 is completed, and the positioning of the main infusion blood vessel on the animal limbs is avoided; on the basis of ensuring the stable positioning of the animal limbs, the main infusion blood vessel is avoided.

[0038] As shown in another embodiment of the application: Figure 6 As shown: the inner adaptive pad 320 further includes a support arc-shaped plate 3201, the air bag pad 3202 is connected to the inner side of the support arc-shaped plate 3201, a plurality of cavities 3203 are formed in the support arc-shaped plate 3201, and the plurality of cavities 3203 correspond to the plurality of unit air bag pads one by one; the cavities 3203 are connected to the unit air bag (the cavities 3203 are connected to the air injection pipe structure 3102, and the air injection pipe structure 3102 is provided with an air exhaust valve).

[0039] The air exhaust valve is a prior art, and its detailed structure can be known from existing literature periodicals, and can also be directly purchased on the market, or can be composed of parts purchased on the market, etc.; it is not the protection object of the present application, and will not be described in detail here, and is not drawn in the drawings.

[0040] Therefore: according to the specific position of the animal infusion point, assemble; first, clamp the two fixed clamping rings 100 on both sides of the infusion point by the two symmetrically distributed side clamping plate structures 300 from both sides, so as to stably assemble the two fixed clamping rings 100 on both sides of the infusion point; this basic clamping action defines the area between the two fixed clamping rings 100 as a controlled "stable area", which provides a reliable platform for subsequent infusion operation.

[0041] To realize high adaptability with the animal's limbs, the structure has multi-stage adjustment capability; firstly, angle self-adaptive adjustment: by releasing the locking of the limiting pin, the connecting rod one and the connecting rod two realize universal angle adjustment through the ball hinge (composed of the limiting ball and the support seat); this design makes the fixed clamping ring 100 flexibly adapt to the complex contour and bending shape of the animal's limbs around the infusion point, ensuring that the device can realize initial stable assembly in various postures. Secondly, blood vessel avoidance adjustment: after the side clamping plate structure 300 completes preliminary positioning, one or more independent unit air bag pads arranged on the clamping surface can be selectively inflated according to the specific blood vessel distribution of the animal's limbs; this innovative design can actively "avoid" the main infusion blood vessel position for accurate positioning and clamping, thereby realizing firm positioning while maximizing the avoidance of pressing the blood vessels to affect the infusion smoothness or cause tissue damage.

[0042] In summary, the device improves the fixing stability and operation reliability of the animal's limbs under complex working conditions through the synergistic effect of the two-stage adjustment mechanism of "angle self-adaptation" and "active blood vessel avoidance".

[0043] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] The preferred embodiments of the present application are described above, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. An animal infusion needle fixing mechanical clamp, comprising two parallel distribution of fixed clamp ring (100), two said fixed clamp ring (100) is connected through a plurality of connecting beam (200); fixed clamp ring (100) comprises two symmetrical distribution of side clamp plate structure (300), two side clamp plate structure (300) is detachably connected; characterized in that, The side clamping plate structure (300) comprises an arc-shaped clamping plate (310) and an inner adaptive pad (320), the inner adaptive pad (320) is laid on the inner surface of the arc-shaped clamping plate (310); the inner adaptive pad (320) comprises a gas bag pad (3202), the gas bag pad (3202) is composed of a plurality of unit gas bag pads; the positioning on the animal limb and the stable limiting are achieved by inflating a plurality of unit gas bag pads at one place or a plurality of places.

2. The needle fixing mechanical clamp for animal infusion according to claim 1, characterized in that, The connecting beam (200) comprises a connecting rod one and a connecting rod two, the connecting rod one and the connecting rod two are hingedly connected through a ball and a support seat, the ball is fixed at the end of the connecting rod one, and the support seat is fixed at the end of the connecting rod two; A limiting pin is arranged on the support seat outside the ball for limiting the ball and the support seat.

3. The needle fixing mechanical clamp for animal transfusion according to claim (1), characterized in that, The arc-shaped clamping plate (310) comprises an arc-shaped plate body (3101), one connecting plate (3103) is respectively fixed at the end of the arc-shaped plate body (3101) at both ends, the connecting plate (3103) and the arc-shaped plate body (3101) are integrally fixedly connected, a plurality of mounting holes (3104) are formed in the connecting plate (3103), the mounting holes (3104) are used for being matched with bolts to detachably connect between the two side clamping plate structures (300), and the plurality of mounting holes (3104) are equidistantly distributed along the connecting plate (3103).

4. The needle fixing mechanical clamp for animal transfusion according to claim 3, wherein The arc-shaped clamping plate (310) further comprises a plurality of gas injection pipe structures (3102), the plurality of gas injection pipe structures (3102) are arrayed along the arc-shaped plate body (3101), and the plurality of gas injection pipe structures (3102) are in one-to-one correspondence with the plurality of unit gas bag pads.

5. The needle fixation device of claim 4, wherein the needle fixation device is configured to be attached to a needle hub of a needle. The gas injection pipe structure (3102) comprises a guide cylinder (3105) and an inner push piece (3106), the guide cylinder (3105) penetrates through the arc-shaped plate body (3101) and extends into the unit gas bag pad; The inner push piece (3106) movably penetrates into the guide cylinder (3105).

6. The needle fixation device of claim 5, wherein the needle fixation device is configured to be attached to the needle hub of the needle. The guide cylinder (3105) is open at both ends; a gas supply pipe (3107) is arranged at one side of the guide cylinder (3105), one end of the gas supply pipe (3107) communicates with the outside, the other end communicates with the inside of the end of the guide cylinder (3105), and a one-way air inlet valve is arranged at the connection position of the guide cylinder (3105) and the gas supply pipe (3107).

7. The needle fixation device of claim 5, wherein the needle fixation device is a needle fixation device for an animal infusion needle. The inner push piece (3106) comprises a piston (3108) and an inner penetrating rod (3111), the piston (3108) and the inner penetrating rod (3111) are integrally fixedly connected, the columnar center lines of the piston (3108) and the inner penetrating rod (3111) are on the same straight line, and the piston (3108) movably penetrates into the guide cylinder (3105).

8. The needle fixation device of claim 7, wherein the needle fixation device is a needle fixation device for an animal infusion needle. The inner pushing piece (3106) further comprises a limiting ring (3109) sleeved and fixed on an inner penetrating rod (3111), the inner penetrating rod (3111) is provided with a pushing disc (3112) at an end away from the piston (3108), the pushing disc (3112) and the inner penetrating rod (3111) are rotationally connected; the column of the pushing disc (3112) and the inner penetrating rod (3111) is on the same straight line with the center line; the pushing disc (3112) is fixed with a pull ring (3113), and the pushing disc (3112) is externally provided with a limiting screw thread.

9. The needle-holding mechanical clamp for animal transfusion according to claim (8), wherein The inner penetrating rod (3111) is sleeved with a spring (3110), the spring (3110) is not in contact with the inner penetrating rod (3111); one end of the spring (3110) is fixed on the limiting ring (3109), and the other end is connected to the arc-shaped plate body (3101).

10. The needle fixation device of claim 1, wherein the needle fixation device is a needle fixation device for an animal infusion set. The inner adaptive pad (320) further comprises a supporting arc-shaped plate (3201), the air bag pad (3202) is connected to the inner side of the supporting arc-shaped plate (3201), a plurality of cavities (3203) are formed on the supporting arc-shaped plate (3201), and the plurality of cavities (3203) are in one-to-one correspondence with the plurality of unit air bag pads; the cavities (3203) are communicated with the unit air bags.

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