Blood sampling device used by animal husbandry and veterinary medicine

Abstract

The utility model discloses a blood collection device for animal husbandry veterinarians, which is characterized in that the upper part of a mounting seat is provided with an upper through hole for the tail of an animal husbandry to pass through, the outer surface of the mounting seat is rotatably connected with one end of a support bracket, the other end of the support bracket is provided with a detachable connecting structure, and the connecting structure is fixedly connected with the tail of the animal husbandry; a mounting through hole is formed in the middle of the supporting bracket and is rotationally connected with one end of the acupuncture needle bracket, the acupuncture needle bracket is fixedly connected with the acupuncture needle push rod shell, and the front end of the acupuncture needle push rod is detachably connected with the needle head; a needle cylinder connecting support is arranged on the surface of the supporting support, the needle cylinder is clamped into the needle cylinder connecting support, and the inlet end of the needle cylinder is connected with the outlet end of the needle through a blood drawing tube. A push-pull rod of the needle cylinder is connected with the needle cylinder push rod. Compared with the prior art, the technical scheme provided by the utility model has the advantages of simple structure, convenience in operation and the like, and can effectively improve the convenience and safety of animal blood sample collection.

Description

Technical Field

[0001] This utility model relates to the field of animal husbandry and veterinary tools, and in particular to a blood collection device used by animal husbandry and veterinary medicine. Background Technology

[0002] In the livestock farming industry, blood samples are collected regularly to monitor the health of livestock such as pigs, cattle, and sheep. When livestock show obvious symptoms, blood samples are also collected and tested in a timely manner to detect and confirm the actual physical condition of the animals and provide appropriate treatment.

[0003] In existing technologies, blood samples are usually collected from the base of the animal's tail where it connects to its body. If the blood sample volume is small, a veterinarian or other professional can directly insert a needle into the area where the animal's tail connects to its body to collect a smaller blood sample.

[0004] However, when collecting large amounts of blood, continuing with the above method would increase the difficulty for staff. Furthermore, if livestock experience emotional fluctuations during prolonged collection, they may kick their hooves, posing a threat to the health and lives of the personnel involved. Utility Model Content

[0005] The main purpose of this invention is to provide a blood collection device for animal husbandry and veterinary use that is simple in structure and easy to operate, aiming to improve the convenience and safety of blood sample collection from livestock.

[0006] To achieve the above objectives, this utility model proposes a blood collection device for animal husbandry and veterinary use, including a mounting base that is in contact with and connected to the buttocks of an animal. The upper part of the mounting base is provided with an upper through hole for the animal's tail to pass through. The outer surface of the mounting base is rotatably connected to one end of a support bracket. The other end of the support bracket is provided with a detachable connecting structure, which is fixedly connected to the animal's tail.

[0007] The support bracket has a mounting through hole in the middle, which is rotatably connected to one end of the needle bracket. The needle bracket is fixedly connected to the needle push rod housing, and the front end of the needle push rod is detachably connected to the needle tip.

[0008] The support frame has a syringe connecting bracket on its surface. The syringe is inserted into the syringe connecting bracket, and the syringe inlet is connected to the needle outlet via a suction tube. The syringe push rod is connected to the syringe push rod.

[0009] Preferably, the telescopic rod of the needle push rod is provided with a positioning groove at its front end. The positioning groove is connected to the needle positioning clip. When the needle is inserted into the positioning groove, the central axis of the needle coincides with the central axis of the telescopic rod.

[0010] Preferably, the positioning groove is a groove structure with one side open. The needle is inserted into the positioning groove through the open side. The width of the center groove matches the width of the center structure of the needle. Positioning blocks are provided on both sides of the center structure of the needle. One positioning block passes through the center groove and is inserted into the positioning hole at the root of the positioning groove, while the other positioning block is located outside the positioning groove.

[0011] Preferably, the telescopic rod is threaded to a front mounting block at its end, and the positioning groove is located in the middle of the front mounting block.

[0012] Preferably, the outer circumferential surface of the telescopic rod is provided with at least two parallel guide lights.

[0013] Preferably, a fixed platform is provided on both sides of the middle of the mounting through hole, and a rotating shaft is provided at the front end of the needle holder. Damping structures are provided at both ends of the rotating shaft, and the two ends of the rotating shaft are rotatably connected to the fixed platform through dampers.

[0014] Preferably, the connecting structure includes a cable tie, which is fixedly connected to the support bracket in the middle. One end of the cable tie is provided with a connecting ring, and the other end of the cable tie is provided with a Velcro strap. After the other end of the cable tie passes through the connecting ring, the other end of the cable tie is adhesively connected to the main body of the cable tie.

[0015] Preferably, an elastic positioning block is provided inside the lower part of the support bracket, and a semi-circular positioning block is provided on the outer surface of the mounting base. A number of positioning holes are provided at intervals along the inner side of the semi-circular periphery of the semi-circular positioning block. The elastic positioning block can penetrate into the support bracket or extend outward, and the elastic positioning block can be inserted and positioned with the positioning holes at different positions.

[0016] Preferably, one side of the outer peripheral surface of the syringe connecting bracket is fixedly connected to the surface of the support bracket, the other side of the outer peripheral surface of the syringe connecting bracket is provided with an opening, one end of the syringe connecting bracket is provided with a first positioning groove, the syringe is inserted into the syringe connecting bracket through the opening, and the side positioning block of the syringe is inserted into the first positioning groove.

[0017] Preferably, the housing of the syringe plunger is fixedly connected to the support bracket, and the front end of the syringe plunger is provided with a push-pull rod positioning bracket, which is provided with a second positioning slot, and the push-pull rod part of the syringe is inserted into the second positioning slot.

[0018] The technical solution of this utility model has the following advantages over the prior art:

[0019] This invention involves passing the animal's tail through the upper through-hole of the mounting base, ensuring the mounting base fits snugly against the animal's rump. The support bracket is then rotated relative to the mounting base to a suitable angle, supporting the animal's tail upwards. An elastic positioning block extends outwards from the support bracket and inserts into a suitable positioning hole in the semi-circular positioning block. The support bracket and the semi-circular positioning block are then fixedly connected at a defined angle. Finally, the two ends of the tie-up section of the connecting structure are brought closer to the animal's tail, with both ends wrapping around the other side of the tail. After the other end of the tie-up section passes through the connecting ring at one end, it is bonded to the main body of the tie-up section. The animal's tail, the support bracket, and the mounting base together form a triangular structure.

[0020] The needle is inserted into the designated location on the animal's body using the needle plunger. The syringe plunger pulls the syringe's push-pull rod backward, creating a negative pressure environment inside the syringe. Blood drawn from the animal through the needle is then injected into the syringe via a collection tube. Once the appropriate amount of blood has been drawn, the needle plunger resets. The operator then moves the syringe containing the blood sample and the push-pull rod outward to remove the syringe. Finally, the syringe plunger is pushed back towards the syringe's connecting bracket to reset the syringe, thus ensuring safe blood extraction from the animal. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the blood collection device of this utility model;

[0023] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 This is another three-dimensional structural diagram of the blood collection device of this utility model;

[0025] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0026] Figure 5 This is a side view of the blood collection device of this utility model;

[0027] Figure 6 for Figure 5A magnified view of a section at point C;

[0028] Figure 7 This is a schematic diagram of the needle structure of this utility model;

[0029] Figure 8 This is a schematic diagram of the syringe structure of this utility model.

[0030] Explanation of icon numbers:

[0031] 1. Mounting base; 11. Groove; 12. Upper through hole; 13. Semi-circular positioning block; 131. Positioning hole; 2. Support bracket; 21. Mounting through hole; 22. Fixing platform; 23. Damping structure; 24. Elastic positioning block; 3. Connecting structure; 31. Cable tie part; 32. Connecting ring; 33. Velcro; 4. Needle holder; 41. Needle push rod; 42. Telescopic rod; 421. Front mounting block; 43. Positioning groove; 431. Central groove ; 432, Positioning hole; 433, Extension structure; 44, Indicator light; 45, Rotating shaft; 5, Needle; 51, Outlet end; 52, Central structure; 53, Positioning block; 6, Syringe connecting bracket; 61, Opening; 62, First positioning slot; 7, Syringe; 71, Inlet end; 72, Push-pull rod; 73, Side positioning block; 74, Tail structure; 8, Aspiration tube; 9, Syringe push rod; 91, Push-pull rod positioning bracket; 92, Second positioning slot.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] This utility model proposes a blood collection device for use in animal husbandry and veterinary medicine.

[0035] Please see Figures 1 to 8 The blood collection device used by animal husbandry and veterinary medicine in this embodiment of the utility model includes a mounting base 1 that is in contact with and connected to the buttocks of the animal. The surface of the mounting base 1 opposite to the buttocks of the animal may be provided with a corresponding groove 11, and the groove 11 may directly cover the surface of the buttocks of the animal.

[0036] The upper part of the mounting base 1 is provided with an upper through hole 12 for the animal's tail to pass through. Since the blood collection device of this utility model is designed for the blood collection of animals, and animals usually have tails, when the mounting base 1 covers the animal's buttocks, the animal's tail is passed through the upper through hole 12 and outwards. The mounting base 1 can then be easily installed and covered on the surface of the animal's buttocks, which can serve as initial positioning.

[0037] The outer surface of the mounting base 1 is rotatably connected to one end of the support bracket 2, and the other end of the support bracket 2 is provided with a detachable connecting structure 3. The connecting structure 3 can be connected to the surface of the animal's tail to fix the animal's tail.

[0038] The support bracket 2 has a mounting through hole 21 in the middle, which is rotatably connected to one end of the needle bracket 4. The needle bracket 4 is fixedly connected to the housing of the needle push rod 41, and the front end of the needle push rod 41 is fixedly connected to the needle 5.

[0039] The surface of the support bracket 2 is also provided with a syringe connecting bracket 6. The syringe 7 is inserted into the syringe connecting bracket 6, and the inlet end 71 of the syringe 7 is connected to the outlet end 51 of the needle 5 through the aspiration tube 8. The push-pull rod 72 of the syringe 7 is connected to the syringe push rod 9. The push-pull rod 72 of the syringe 7 moves relative to the inside of the syringe 7 through the extension and retraction of the syringe push rod 9.

[0040] Preferably, in order to fix the needle 5 to the front end of the telescopic rod 42 of the needle push rod 41, the front end of the telescopic rod 42 of the needle push rod 41 is provided with a positioning groove 43, and the positioning groove 43 is connected to the positioning snap-fit ​​of the needle 5. After the needle 5 is snapped into the positioning groove 43, the central axis of the needle 5 coincides with the central axis of the telescopic rod 42. When the telescopic rod 42 of the needle push rod 41 moves forward, the central axis of the needle 5 coincides with the central axis of the telescopic rod 42. When the needle 5 is inserted into the body of the animal, the needle 5 is not easy to move. In addition, after using other positioning structures to determine the direction and trajectory of the telescopic rod 42, the movement trajectory of the needle 5 is a determined trajectory.

[0041] Preferably, in this invention, the positioning groove 43 at the front end of the telescopic rod 42 is a groove structure open on one side. The needle 5 can be inserted into the positioning groove 43 through the open side of the positioning groove 43. The width of the central groove of the positioning groove 43 matches the width of the central structure 52 of the needle 5. That is, after the needle 5 is inserted into the positioning groove 43, the central structure 52 of the needle 5 is tightly connected to the central groove 431 of the positioning groove 43, and it is not easy to shift. At the same time, since the needle 5 used in this invention has positioning blocks 53 on both sides of the central structure 52 of the needle 5, one positioning block 53 passes through the central groove 431 and is inserted into the positioning hole 432 at the root of the positioning groove 43, while the other positioning block 53 is located outside the positioning groove 43. At this point, it can be seen that one of the positioning blocks 53 of the needle 5 is inserted into the positioning hole 432 at the root of the positioning groove 43, so that the needle 5 is completely positioned with the positioning groove 43, while the other positioning block 53 of the needle 5 protrudes outward. In actual operation, the needle 5 can be easily pulled out from inside the positioning groove 43 by simply holding the other positioning block 53 with your fingers.

[0042] In addition, since the needle 5 is inserted into the positioning groove 43 and may move to some extent after being inserted into the animal's body, in other embodiments of this utility model, the axial length of the positioning groove 43 is set to be greater than the length of the central structure 52 of the needle 5, and a forward-extending structure 433 is provided at the rear end of the positioning groove 43. The positioning hole 432 at the root of the positioning groove 43 is also set as an elongated slot. When one positioning block 53 of the needle 5 is inserted into the positioning hole 432, the operator holds the other positioning block 53 with his fingers and drags the needle 5 backward relative to the positioning groove 43. This allows the rear part of the needle 5 to be completely embedded in the rear space of the positioning groove 43. This makes it less likely for the needle 5 to deviate radially after being inserted into the animal's body, ensuring a safe and reliable insertion process.

[0043] Preferably, the needle 5 of this utility model is provided with two positioning blocks 53. Based on the above description of the structural features of the positioning groove 43, the two positioning blocks 53 provided on the outer periphery of the needle 5 can be arranged in a circumferentially symmetrical manner.

[0044] To better accommodate different needles 5, the telescopic rod 42 in this embodiment is threaded to a front mounting block 421. A positioning groove 43 can be set in the middle of the front mounting block 421. This allows for the threaded connection of different front mounting blocks 421 to different models or sizes of needles. In veterinary use, different front mounting blocks can be assembled according to different blood drawing situations to accommodate the installation and use of different needles 5.

[0045] Preferably, since the needle 5 is installed at the front end of the needle insertion rod 41, and there may be positional deviations during the process of the needle 5 being pushed forward into the animal's body, the blood collection device of this utility model can also be equipped with several guide lights 44 at the front end of the needle insertion rod 41. For example, two guide lights 44 are respectively set on both radial sides of the needle insertion rod 41, and the central axis of the needle 5 is located at the center of the straight line of the two guide lights 44. When the veterinarian actually adjusts the direction of the needle 5, by turning on the two guide lights 44 and illuminating the surface of the animal's body with the light spots of the two guide lights 44, the midpoint between the two light spots can be determined as the position where the needle 5 will be inserted into the animal's body. This allows veterinarians with insufficient experience or non-professionals to more accurately find the correct needle insertion position.

[0046] The outer surface of the mounting base 1 in this application is rotatably connected to one end of the support bracket 2. This allows the angle between the support bracket 2 and the mounting base 1 to change by swinging the support bracket 2, thus meeting different needle insertion angle requirements. After adjusting the support bracket 2, the needle insertion bracket 4 also needs to be fixed relative to the support bracket 2 to prevent changes in the angle of the needle insertion bracket 4 during needle insertion, which could affect the actual needle insertion position from coinciding with the target position and thus the actual needle insertion effect. Therefore, the mounting through hole 21 of this utility model has fixed platforms 22 on both sides at the middle position, and the front end of the needle insertion bracket 4 has a rotating shaft 45. The two ends of the rotating shaft 45 are respectively provided with damping structures 23, and the two ends of the rotating shaft 45 are rotatably connected to the fixed platforms 22 through the dampers 23. In actual use, the damping structure 23 can be a commercially available actual damping module. As long as the damping value corresponding to the damping structure 23 reaches a suitable value, the angle of swing of the needle insertion bracket 4 relative to the support bracket 2 can be smaller or the swing speed can be slower during the actual swinging of the needle insertion bracket 4, resulting in a more accurate and effective final position and angle.

[0047] Preferably, the support bracket 2 of this invention has an elastic positioning block 24 inside its lower part. The elastic positioning block 24 can partially protrude from the outside of the support bracket 2. At the same time, the outer surface of the mounting base 1 has a semi-circular positioning block 13. A plurality of positioning holes 131 are spaced along the inner side of the semi-circular periphery of the semi-circular positioning block 13. Therefore, when part of the structure of the elastic positioning block 24 elastically protrudes outward, the elastic positioning block 24 can be inserted into a certain positioning hole 131. If the elastic positioning block 24 moves into the support bracket 2, the support bracket 2 will not be restricted by the semi-circular positioning block 13 and can swing to any position.

[0048] Preferably, in order to restrain the tail of livestock, the connecting structure 3 includes a cable tie 31, which is fixedly connected to the support bracket 2 in the middle. One end of the cable tie 31 is provided with a connecting ring 32, and the other end of the cable tie 31 is provided with a Velcro 33. After the other end of the cable tie 31 passes through the connecting ring 32, the other end of the cable tie 31 can be bonded to the main body of the cable tie 31. That is, when the other end of the cable tie 31 passes through the connecting ring 32, the Velcro 33 at the other end of the cable tie 31 is connected to the Velcro 33 on the surface of the main body of the cable tie 31.

[0049] In addition, to prevent the connecting structure 3 from shifting after being connected to the animal's tail, an anti-slip sticker can be provided on the inner surface of the tie part 31 to increase the static friction force between the tie part 31 and the animal's tail. The Velcro 33 forms a connecting structure that wraps around the surface of the animal's tail, making it less likely to come off outwards.

[0050] In this embodiment, one side of the outer peripheral surface of the syringe connecting bracket 6 is fixedly connected to the surface of the support bracket 2, and the other side of the outer peripheral surface of the syringe connecting bracket 6 is provided with an opening 61. One end of the syringe connecting bracket 6 is provided with a first positioning groove 62. The syringe 7 is inserted into the syringe connecting bracket 6 through the opening 61, and the side positioning block 73 of the syringe 7 is inserted into the first positioning groove 62. In this way, the syringe 7 and the syringe connecting bracket 6 are completely fixedly connected.

[0051] Meanwhile, the housing of the syringe plunger 9 is fixedly connected to the support bracket 2. The front end of the syringe plunger 9 is provided with a push-pull rod positioning bracket 91, and the push-pull rod positioning bracket 91 is provided with a second positioning slot 92. The tail structure of the push-pull rod 72 of the syringe 7 is inserted into the second positioning slot 92, so that the syringe plunger 9 can pull the push-pull rod 72 away from the main body of the syringe 7, or the syringe plunger 9 can push the push-pull rod 72 to move inward toward the inside of the syringe 7.

[0052] Please see Figures 1 to 8 The specific working principle of the blood collection device used in animal husbandry and veterinary medicine of this utility model is as follows:

[0053] The operator inserts the animal's tail through the upper through hole 12 of the mounting base 1, ensuring that the mounting base 1 is flush with the animal's rump. Then, the support bracket 2 is rotated relative to the mounting base 1 to a suitable angle position, with the support bracket 2 facing upwards. The support bracket 2 supports the animal's tail upwards. At this time, the elastic positioning block 24 extends elastically outwards from the support bracket 2 and is inserted into the appropriate positioning hole 131 of the semi-circular positioning block 13, so that the support bracket 2 and the semi-circular positioning block 13 are fixedly connected, that is, the support bracket 2 and the mounting plate 1 are maintained at a certain relative angle.

[0054] Then, by bringing both ends of the tie section 31 of the connecting structure 3 toward the tail of the animal, and by having both ends of the tie section 31 go around the other side of the tail, and by passing the other end of the tie section 31 through the connecting ring 32 at one end, the other end of the tie section 31 is bonded to the main body of the tie section 31. Thus, the tail of the animal, the support bracket 2, and the mounting base 1 together form a triangular structure.

[0055] Then, by inserting the syringe 7 into the syringe connecting bracket 6 through the opening 61, and inserting the side positioning block 73 of the syringe 7 into the first positioning slot 62, and connecting the push-pull rod 72 of the syringe 7 to the front end of the syringe push rod 72, the push-pull rod 72 moves axially relative to the syringe 7 by pushing or pulling the syringe push rod 9.

[0056] Then, insert the needle 5 into the positioning groove 43 at the front end of the telescopic rod 42 of the needle insertion push rod 41, and fix the needle 5 to the telescopic rod 42. Then, use the aspiration tube 8 to connect the needle 5 and the syringe 7.

[0057] To ensure the accuracy of the needle 5's insertion into the animal's body, the needle 5 needs to be adjusted to the correct insertion position before insertion. This is achieved by activating two indicator lights 44 on the outer surface of the telescopic rod 42, which guide the needle 5 to its correct insertion position. If the needle 5 is not in the correct insertion position, the relative angle between the insertion bracket 4 and the support bracket 2 is adjusted to ensure the correct insertion position. The adjustment of the insertion bracket 4 is a damped adjustment to avoid excessive adjustment angles and subsequent changes in angle after adjustment.

[0058] Finally, the needle 5 is inserted into the designated location on the animal's body by using the needle insertion rod 41. The syringe plunger 9 pulls the syringe 7's push-pull rod 72 backward, creating a negative pressure environment inside the syringe 7. The blood drawn from the animal's body through the needle 5 can be injected into the syringe 7 through the suction tube 8. After the appropriate amount of blood has been drawn and contained, the needle insertion rod 41 is reset. The operator moves the syringe 7 containing the blood sample and the push-pull rod 72 outward to remove the syringe 7. Then, the syringe plunger 9 is pushed towards the syringe connecting bracket 6 to reset.

[0059] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A blood collection device for use in veterinary medicine, characterized in that, The installation seat is connected with the tail of the livestock animal, and the upper part of the installation seat is provided with an upper through hole for the tail of the livestock animal to pass through. The middle part of the supporting bracket is provided with an installation through hole, and the installation through hole is rotatably connected with one end of the needle insertion support. The surface of the supporting bracket is provided with a needle cylinder connecting bracket, the needle cylinder is clamped into the needle cylinder connecting bracket, and the inlet end of the needle cylinder is connected with the outlet end of the needle head through a blood drawing tube.

2. The blood collection device for use in animal husbandry according to claim 1, wherein, The front end of the telescopic rod of the needle insertion push rod is provided with a positioning groove, and the needle head is clamped into the positioning groove.

3. The blood collection device for use in animal husbandry of claim 2, wherein, The positioning groove is a groove structure with one side open, the needle head is clamped into the positioning groove through the open side, the center groove width of the positioning groove is matched with the center structure width of the needle head, and the two sides of the center structure of the needle head are provided with positioning blocks.

4. The blood collection device for use in animal husbandry as claimed in claim 2, wherein, The end part of the telescopic rod is threadedly connected with a front end mounting block, and the positioning groove is arranged in the middle part of the front end mounting block.

5. The blood collection device for use in animal husbandry as claimed in claim 2, wherein, The outer circumferential surface of the telescopic rod is provided with at least two parallel guide lamps.

6. The blood collection device for use in animal husbandry of claim 1, wherein, The middle part of the installation through hole is provided with a fixed table on both sides, the front end of the needle insertion support is provided with a rotating shaft, and the two ends of the rotating shaft are respectively provided with damping structures.

7. The blood collection device for use in animal husbandry of claim 1, wherein, The connecting structure includes a strap part, the strap part is fixedly connected with the supporting bracket in the middle part, one end of the strap part is provided with a connecting ring, and the other end of the strap part is provided with a magic tape.

8. The blood collection device for use in animal husbandry of claim 1, wherein, The supporting bracket is internally provided with an elastic positioning block, and the outer surface of the installation seat is provided with a semicircular positioning block.

9. The blood collection device for use in animal husbandry of claim 1, wherein, The outer circumferential surface of the needle cylinder connecting bracket is fixedly connected with the surface of the supporting bracket on one side, and the other side of the outer circumferential surface of the needle cylinder connecting bracket is provided with an opening.

10. The blood collection device for use in animal husbandry of claim 9, wherein, The shell of the needle cylinder push rod is fixedly connected with the supporting bracket, the front end of the needle cylinder push rod is provided with a push-pull rod positioning bracket, the push-pull rod positioning bracket is provided with a second positioning clamping groove, and the push-pull rod of the needle cylinder is clamped into the second positioning clamping groove.

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