Mouse tail intravenous injection device

Abstract

The utility model belongs to the technical field of animal experiment tools, and particularly relates to a rat tail intravenous injection device which comprises a rat tail fixing mechanism and an injection needle propelling mechanism, the rat tail fixing mechanism comprises a containing boss, two rolling mechanisms arranged on the side edges of the containing boss and two binding bands close to the end of the containing boss, and the two binding bands are arranged on the side edges of the containing boss. A containing groove with the bottom height gradually changing is formed in the top of the containing boss. One ends of the two bandages are connected with one side of the placement boss, and the other ends of the two bandages penetrate through the side wall of the containing groove and extend to the other side of the placement boss to be connected with the two winding mechanisms correspondingly; the two bandages can be independently attached to the rat tail through the two winding mechanisms to fix the rat tail, the height of the bottom of the containing groove is gradually changed, so that front and back outline changes of the rat tail can be counteracted, the face with the vein blood vessel can be approximately parallel to the top face of the containing boss, an injection needle can be easily punctured into the vein blood vessel, and the operation is convenient. And the vein blood vessel is not easily punctured.

Description

Technical Field

[0001] The utility model belongs to the technical field of animal experiment tools, and in particular relates to a rat tail vein injection device. Background Art

[0002] Tail vein injection of experimental mice is a commonly used experimental method in medical experiments, and is widely used in experimental fields such as pharmacology, toxicology, genetics, tumors and immunology. Since the tail vein of mice is thin, it is not easy to fix. If the fixation position is not appropriate, it is not conducive to needle insertion. At the same time, mice are active by nature, making injection more difficult.

[0003] Although the existing mouse tail vein injection device can fix the mouse tail, there is a large angle between the exposed surface of the mouse tail vein and the operation plane, which makes it easy to puncture the blood vessel when inserting the needle. The needle insertion is difficult, and the clamping and fixing position is too flat and does not fit the mouse tail, which can easily damage the mouse tail. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a mouse tail vein injection device, which reduces the angle between the exposed surface of the mouse tail vein and the operation plane and reduces the difficulty of needle insertion.

[0005] The content of this utility model includes:

[0006] A rat-tail fixing mechanism, the rat-tail fixing mechanism comprising a placing boss, two reeling mechanisms arranged on the sides of the placing boss, and two binding straps near the ends of the placing boss, the top of the placing boss is provided with a receiving groove with a gradually changing bottom height; one end of the two binding straps is connected to one side of the placing boss, and the other end passes through the side wall of the receiving groove and extends to the other side of the placing boss and is respectively connected to the two reeling mechanisms; and

[0007] The injection needle advancing mechanism is arranged at one end of the mouse tail fixing mechanism, and the injection needle advancing mechanism comprises a linear guide rail and a plurality of buckles arranged on the linear guide rail.

[0008] Optionally, two notches are provided on one side of the accommodating groove on the placing boss, and one end of the two straps away from the winding mechanism is fixedly connected with a connecting block, and the two connecting blocks are respectively embedded in the two notches and fixed to the placing boss by screws.

[0009] Optionally, the position where the binding belt is connected to the connecting block is close to the middle of the accommodating groove.

[0010] Optionally, the winding mechanism includes a base, a reel that passes through the base, and a fastening nut that is threaded to one end of the reel; one end of the reel is rotatably connected to the base, and the other end extends to the outside of the base, the winding portion of the reel is located inside the base, and the fastening nut is located on the outside of the base away from the strap.

[0011] Optionally, one end of the reel extending to the outside of the base is rigidly connected to a knob with an anti-slip groove on the surface.

[0012] Optionally, the inner wall of the accommodating groove is an arc surface, and the radius increases linearly from one end close to the injection needle propulsion mechanism to the other end.

[0013] Optionally, the injection needle advancement mechanism further comprises a base plate and a height adjustment mechanism disposed at the bottom of the linear guide rail, the base plate is provided with a straight groove in the extension direction of the accommodating groove, and the height adjustment mechanism is drivingly connected to the linear guide rail and disposed in the straight groove.

[0014] Optionally, the height adjustment mechanism includes an inverted trapezoidal guide fixedly connected to the bottom of the linear guide rail, two wedge blocks respectively fitted with the two inclined surfaces of the inverted trapezoidal guide, a screw rod threadedly connected to the two wedge blocks, and an axis support rotatably connected to one end of the screw rod extending out of the straight groove; the axis support is rigidly connected to the base plate, and the wedge block is slidably connected to the inner wall of the straight groove.

[0015] Optionally, the bottom of the inverted trapezoidal guide is rigidly connected to two guide plates, and the two guide plates are clearance-matched with the inner wall of the straight groove and are respectively located on both sides of the screw rod.

[0016] Optionally, the buckle includes two elastic bent plates arranged opposite to each other, and the area between the two elastic bent plates is a region for clamping the injection needle.

[0017] The beneficial effect of the utility model is that the mouse tail can be placed in the accommodating groove, and then the two straps are passed over the upper ends of the mouse tail and through the side walls of the accommodating groove to play a limiting role. The two straps can be separately made to be close to the mouse tail through the two winding mechanisms to fix the mouse tail. Since the bottom height of the accommodating groove changes gradually, the front and rear contour changes of the mouse tail can be offset, so that the side with the veins can be nearly parallel to the top surface of the placement boss, which makes it easier to operate the injection needle to penetrate the veins and is not easy to puncture the veins. The needle tube of the injection needle can also be fixed by a buckle and slid along the linear guide rail to penetrate the veins. Note that the placement angle of the mouse tail needs to be adjusted in advance. Since the strap can be adaptively deformed according to the contour of the mouse tail, the contact area between the strap and the mouse tail is larger, which can better fix the mouse tail and is not easy to damage the mouse tail. The tightening force of the strap can make the veins of the mouse tail appropriately dilated, and the difficulty of needle insertion can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the rat tail vein injection device provided by the utility model from perspective 1;

[0019] Figure 2 This is a schematic structural diagram of the rat tail vein injection device provided by the utility model from a second perspective;

[0020] Figure 3 for Figure 2 A magnified image of area A;

[0021] Figure 4 A top view of the rat tail vein injection device provided by the utility model;

[0022] Figure 5 for Figure 4 BB cross-section diagram;

[0023] Figure 6 A cross-sectional view of the injection needle propulsion mechanism provided by the utility model;

[0024] Figure 7 for Figure 4 CC cross-section diagram.

[0025] In the figure: 10, rat tail fixing mechanism; 11, boss; 111, receiving groove; 12, winding mechanism; 121, base; 122, reel; 123, fastening nut; 124, knob one; 13, strap; 131, connecting block; 14, base plate; 20, injection needle advancing mechanism; 21, linear guide; 22, buckle; 221, elastic bending plate; 23, bottom plate; 231, straight groove; 24, height adjustment mechanism; 241, inverted trapezoidal guide; 242, wedge block; 243, screw rod; 244, guide plate; 245, shaft support; 246, knob two. DETAILED DESCRIPTION

[0026] like Figure 1-7 As shown, the utility model provides a rat tail intravenous injection device, comprising: a rat tail fixing mechanism 10 and an injection needle pushing mechanism 20 arranged at one end of the rat tail fixing mechanism 10, the rat tail fixing mechanism 10 comprises a placement boss 11, two winding mechanisms 12 arranged on the side of the placement boss 11 and two binding straps 13 close to the end of the placement boss 11, the top of the placement boss 11 is provided with a receiving groove 111 with a gradually changing bottom height; one end of the two binding straps 13 is connected to one side of the placement boss 11, and the other end passes through the side wall of the receiving groove 111 and extends to the other side of the placement boss 11 and is respectively connected to the two winding mechanisms 12; the injection needle pushing mechanism 20 comprises a linear guide rail 21 and a plurality of buckles 22 arranged on the linear guide rail 21.

[0027] Compared with the prior art, the rat tail intravenous injection device provided by the utility model can place the rat tail in the receiving groove 111, and then the two straps 13 go around the top of the two ends of the rat tail and pass through the side wall of the receiving groove 111 to play a limiting role. The two winding mechanisms 12 can make the two straps 13 close to the rat tail and fix the rat tail. Since the bottom height of the receiving groove 111 changes gradually, the front and rear contour changes of the rat tail can be offset, so that the side with the vein can be nearly parallel to the top surface of the placement boss 11, which makes it easier to operate the injection needle to pierce the vein and is not easy to pierce the vein. The needle tube of the injection needle can also be fixed by the buckle 22, and the needle can be slid along the linear guide rail 21 to pierce the vein. Note that the placement angle of the rat tail needs to be adjusted in advance; since the strap 13 can be adaptively deformed according to the contour of the rat tail, the contact surface between the strap 13 and the rat tail is larger, which can better fix the rat tail and is not easy to damage the rat tail; the tightening force of the strap 13 can make the rat tail vein appropriately dilate, and can also reduce the difficulty of needle insertion.

[0028] In this embodiment, two notches are opened on one side of the receiving groove 111 on the placing boss 11, and the two ends of the two straps 13 away from the winding mechanism 12 are fixedly connected with a connecting block 131. The two connecting blocks 131 are respectively embedded in the two notches and fixed to the placing boss 11 by screws.

[0029] Specifically, two notches penetrate the side wall of the accommodating groove 111, and a groove (not shown in the figure) for connecting the end of the strap 13 is opened on the side of the connecting block 131 close to the accommodating groove 111. The end of the strap 13 can be fixed by applying glue into the groove or by screws passing through the groove. The two connecting blocks 131 are placed in a rat tail position before being connected to the placement boss 11. The connecting blocks 131 are fixed to the notches of the placement boss 11 by screws, and can be quickly fixed and disassembled.

[0030] In this embodiment, the position where the strap 13 is connected to the connecting block 131 is close to the middle of the receiving groove 111, so that the strap 13 can be in contact with the mouse tail more, which is conducive to stably fixing the mouse tail and improving the comfort, and can prevent the experimental mouse from struggling and damaging the mouse tail.

[0031] In this embodiment, the winding mechanism 12 includes a base 121, a reel 122 that passes through the base 121, and a fastening nut 123 that is threadedly connected to one end of the reel 122; one end of the reel 122 is connected to the base 121 for fixed-axis rotation, and the other end extends to the outside of the base 121. The winding portion of the reel 122 is located inside the base 121, and the fastening nut 123 is located on the outside of the base 121 away from the strap 13.

[0032] Specifically, the base 121 includes two bearing seats arranged at intervals and fixed to the top surface of the base plate 14 by screws. The reel 122 includes a cylindrical section and a threaded section integrally formed with the cylindrical section. The cylindrical section passes through the two bearing seats and has an interference fit with the bearings therein. The fastening nut 123 is screwed on the threaded section. The rotating reel 122 can reel in or lengthen the strap 13. The reel 122 is fixed by the resistance generated by the tight contact between the fastening nut 123 and the base 121. Since a large force is not required to fix the rat tail, the strap 13 can be stably maintained in a certain state, and the rat tail can be fixed when reeling. In addition, the placement boss 11 is fixed to the top surface of the base plate 14 by screws or welding.

[0033] Furthermore, one end of the reel 122 extending to the outside of the base 121 is rigidly connected to a knob 124 having an anti-slip groove on the surface, so that the reel 122 can be rotated more easily by the knob 124 .

[0034] In this embodiment, the inner wall of the receiving groove 111 is an arc surface, and the radius increases linearly from one end close to the injection needle propulsion mechanism 20 to the other end. In this way, the profile of the receiving groove 111 is closer to the shape of a rat tail, and more parts can be in contact with the rat tail, which is beneficial to improving the stability and comfort when fixing the rat tail and facilitating needle insertion and injection.

[0035] In an alternative embodiment, see Figure 6 The injection needle advancing mechanism 20 further includes a bottom plate 23 and a height adjustment mechanism 24 disposed at the bottom of the linear guide rail 21. The bottom plate 23 is provided with a straight groove 231 located in the extending direction of the receiving groove 111. The height adjustment mechanism 24 is drivingly connected to the linear guide rail 21 and disposed in the straight groove 231. In this way, the relative height between the injection needle and the placement boss 11 can be adjusted by the height adjustment mechanism 24, so that the injection needle can be better controlled to be aligned with the rat tail vein.

[0036] In a specific embodiment, see Figure 6The height adjustment mechanism 24 includes an inverted trapezoidal guide 241 fixedly connected to the bottom of the linear guide 21, two wedge blocks 242 respectively fitted with two inclined surfaces of the inverted trapezoidal guide 241, a screw rod 243 screwed to the two wedge blocks 242, and a shaft support 245 rotatably connected to one end of the screw rod 243 extending out of the straight groove 231; the shaft support 245 is rigidly connected to the bottom plate 23, and the wedge blocks 242 are slidably connected to the inner wall of the straight groove 231. In this arrangement, the two wedge blocks 242 can be synchronously moved closer or farther away by rotating the screw rod 243. When the two wedge blocks 242 are close to each other, they cooperate with the two inclined surfaces of the inverted trapezoidal guide 241 to raise the inverted trapezoidal guide 241 and the linear guide 21, thereby raising the injection needle; when the two wedge blocks 242 are away from each other, the height of the injection needle is lowered. Through the cooperation between the screw rod 243 and the wedge block 242, the height of the injection needle can be adjusted relatively smoothly and with relatively small precision.

[0037] In one embodiment, see Figure 7 The bottom of the inverted trapezoidal guide member 241 is rigidly connected to two guide plates 244 , and the two guide plates 244 are clearance-matched with the inner wall of the straight groove 231 and are respectively located on both sides of the screw rod 243 .

[0038] Specifically, the guide plate 244 is a rectangular plate, which is fixed to the bottom of the wedge block 242 by welding, or is an integrally formed structure with the inverted trapezoidal guide 241. Alternatively, the linear guide 21, the inverted trapezoidal guide 241 and the guide plate 244 are an integrally formed structure, which can be achieved by milling. Note that the two guide plates 244 need to maintain a certain distance from the two inclined surfaces of the inverted trapezoidal guide 241 to avoid interference with the wedge block 242. The bottom of the two guide plates 244 is at a certain distance from the bottom of the straight groove 231. The two guide plates 244 can ensure that the linear guide 21 still has high stability when it rises to a certain height.

[0039] In one embodiment, a second knob 246 is fixedly connected to the end of the screw rod 243, so that the screw rod 243 can be rotated more easily.

[0040] In one embodiment, the buckle 22 includes two elastic curved plates 221 arranged opposite to each other, and the area between the two elastic curved plates 221 is a region for clamping the injection needle. Thus, the injection needle is placed in the clamping area through the elastic deformation of the two elastic curved plates 221 when subjected to force, and the injection needle is fixed through the elastic restoring force of the two elastic curved plates 221.

[0041] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0042] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A rat tail vein injection device, characterized in that: include: A rat tail fixing mechanism (10), the rat tail fixing mechanism (10) comprising a placement boss (11), two reeling mechanisms (12) arranged on the side of the placement boss (11), and two binding straps (13) close to the end of the placement boss (11); the top of the placement boss (11) is provided with a receiving groove (111) with a gradually changing bottom height; one end of the two binding straps (13) is connected to one side of the placement boss (11), and the other end passes through the side wall of the receiving groove (111) and extends to the other side of the placement boss (11) and is respectively connected to the two reeling mechanisms (12); and An injection needle advancing mechanism (20) is arranged at one end of the mouse tail fixing mechanism (10), wherein the injection needle advancing mechanism (20) comprises a linear guide rail (21) and a plurality of buckles (22) arranged on the linear guide rail (21).

2. The rat tail vein injection device according to claim 1, characterized in that: Two notches are provided on one side of the receiving groove (111) on the placement boss (11); one end of the two binding straps (13) away from the winding mechanism (12) is fixedly connected to a connecting block (131); the two connecting blocks (131) are respectively embedded in the two notches and fixed to the placement boss (11) by screws.

3. The rat tail vein injection device according to claim 2, characterized in that: The position where the binding belt (13) is connected to the connecting block (131) is close to the middle of the accommodating groove (111).

4. The rat tail vein injection device according to claim 1, characterized in that: The reeling mechanism (12) comprises a base (121), a reel (122) penetrating the base (121), and a fastening nut (123) threadedly connected to one end of the reel (122); one end of the reel (122) is rotatably connected to the base (121), and the other end extends to the outside of the base (121); the reeling portion of the reel (122) is located inside the base (121), and the fastening nut (123) is located outside the base (121) away from the binding strap (13).

5. The rat tail vein injection device according to claim 4, characterized in that: One end of the reel (122) extending to the outside of the base (121) is rigidly connected to a knob (124) having an anti-slip groove on its surface.

6. The rat tail vein injection device according to any one of claims 1 to 5, characterized in that: The inner wall of the accommodating groove (111) is a curved surface, and the radius increases linearly from one end close to the injection needle propulsion mechanism (20) to the other end.

7. The rat tail vein injection device according to any one of claims 1 to 5, characterized in that: The injection needle advancing mechanism (20) further comprises a bottom plate (23) and a height adjustment mechanism (24) arranged at the bottom of the linear guide rail (21); the bottom plate (23) is provided with a straight groove (231) located in the extension direction of the accommodating groove (111); and the height adjustment mechanism (24) is drivingly connected to the linear guide rail (21) and is arranged in the straight groove (231).

8. The rat tail vein injection device according to claim 7, characterized in that: The height adjustment mechanism (24) comprises an inverted trapezoidal guide member (241) fixedly connected to the bottom of the linear guide rail (21), two wedge blocks (242) respectively fitted with two inclined surfaces of the inverted trapezoidal guide member (241), a screw rod (243) threadedly connected to the two wedge blocks (242), and a shaft support (245) rotatably connected to one end of the screw rod (243) extending out of the straight groove (231); the shaft support (245) is rigidly connected to the bottom plate (23), and the wedge blocks (242) are slidably connected to the inner wall of the straight groove (231).

9. The rat tail vein injection device according to claim 8, characterized in that: The bottom of the inverted trapezoidal guide member (241) is rigidly connected to two guide plates (244); the two guide plates (244) are clearance-matched with the inner wall of the straight groove (231) and are respectively located on both sides of the screw rod (243).

10. The rat tail vein injection device according to any one of claims 1 to 5 and 9, characterized in that: The buckle (22) comprises two elastic bent plates (221) arranged opposite to each other, and an area for clamping the injection needle is between the two elastic bent plates (221).

Images