A Rotating Anti-Puncture Syringe

Abstract

The present invention relates to a rotary needle-puncture-proof syringe, comprising a medication component, a protective cap, an elastic member, a rotary card, an inner shell and an outer shell. The present invention achieves locking of the inner shell by rotating the rotary card, and the rotary card is locked with the upper card slot during use, and the main function is to prevent the injection needle from moving forward for the second time during use, thereby reducing the patient's second pain. After the use of the present invention, the rotary card is rotated to unlock, so that the inner shell drives the medication component to move upward, and then the rotary card is locked with the lower card slot. The locking effect of the rotary card and the inner shell is better, and the main function is to prevent the injection needle from being exposed to the outside, causing bacterial infection after stabbing medical personnel and recycling personnel, and preventing the spread of bacteria.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a rotary needle - proof syringe. Background Art

[0002] A syringe is a commonly used medical tool. The liquid medicine is directly injected into the human body through the syringe. Therefore, the injection end of the syringe must ensure aseptic safety, and usually a protective cover is used to protect the syringe. To prevent the needle of the used syringe from accidentally injuring the user, causing drug contamination, or the syringe from being reused, it is generally required to uniformly recycle the needle after injection. However, with the further strict management of medical devices, some institutions have required special protective devices to be installed on disposable syringes. After injection, the protective device is activated to protect the needle part, prevent the needle from accidentally injuring people, and also prevent the needle from separating from the syringe body, improving the safety of using disposable syringes.

[0003] After a large - scale search, it is found that the prior art with the publication number CN211751555U discloses a syringe protective cover, which relates to the technical field of protective covers. It includes an outer protective cover. One side inside the outer protective cover is provided with an inner protective cover. One side inside the outer protective cover is provided with a first protrusion. One side of the first protrusion is provided with a second protrusion. One side of the inner protective cover is provided with a first convex ring, and the side of the inner protective cover away from the first convex ring is provided with a second convex ring. By setting the inner protective cover and the outer protective cover to protect the syringe barrel, it can prevent the syringe from being broken or cracked. Especially when scarce materials and valuable drugs are placed in the syringe barrel, losses can be avoided and the cost is reduced. By setting the syringe protective cover, the adaptability between the protective cover and the syringe is good and it will not fall off. The cooperation of protrusions and convex rings is set between the inner protective cover and the outer protective cover, so that after injection, the inner protective cover and the outer protective cover can be locked to avoid moving under external force and prevent the injection needle from leaking out and injuring people.

[0004] In summary, the existing syringe locks the relative position of the protective cover and the needle through the convex ring and the protrusion. In the actual operation process, the locking effect of the convex ring and the protrusion is poor. If the operating force is too large or too small, the locking effect will be damaged.

[0005] In view of the above - mentioned defects, the designer actively conducts research and innovation in order to create a rotary needle - proof syringe, making it more valuable in industry. Summary of the Invention

[0006] To solve the above - mentioned technical problems, the purpose of the present invention is to provide a rotary needle - proof syringe.

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

[0008] A rotatable anti-needle-stick syringe, comprising a drug delivery assembly, a protective cap, an elastic member, a rotating latch, an inner housing and an outer housing. The outer housing includes an outer housing body in a cylindrical structure. A top plate is provided at the top of the outer housing body. A limit seat is provided on the top plate. A protective corner is provided at the bottom of the outer housing body. The inner diameter of the protective corner is smaller than the inner diameter of the outer housing body. The inner housing includes an inner housing body in a cylindrical structure. A clamping seat is provided at the top of the inner housing body. The clamping seat is installed on the limit seat. The inner housing body is installed inside the outer housing body. An elastic member is provided in contact between the bottom of the inner housing body and the protective corner. On both sides of the clamping seat along the X-axis direction, drug delivery clamping plates are provided. Upper clamping grooves are provided on the inner housing body near the clamping seat. Lower clamping grooves are provided on the inner housing body near the bottom. The rotating latch includes a rotating latch body. The rotating latch body is installed in the cavity between the limit seat and the top plate. On both sides of the rotating latch body along the Y-axis direction, clamping edges are provided. On both sides of the rotating latch body along the X-axis direction, rotating handles are provided. The clamping edges can be clamped with the upper clamping grooves or the lower clamping grooves. The drug delivery assembly includes a push rod and a drug delivery cylinder in a cylindrical structure. The drug delivery cylinder is installed inside the inner housing body. The push rod is installed inside the drug delivery cylinder. A flange is provided at the top of the drug delivery cylinder. The flange is installed on the clamping seat and can be clamped with the drug delivery clamping plates. A syringe needle is installed at the bottom of the drug delivery cylinder. A protective cap is provided at the bottom of the drug delivery cylinder. The protective cap is sleeved outside the syringe needle.

[0009] As a further improvement of the present invention, a contact bump is convexly provided on the inner wall of the rotating handle on the side of the positive X-axis direction.

[0010] As a further improvement of the present invention, a movable snap-in opening is provided at the rotating handle on the side of the negative X-axis direction. The movable snap-in opening includes two snap-in claws that snap into each other.

[0011] As a further improvement of the present invention, guide grooves are provided on both sides of the outer housing body along the Y-axis direction. Limit cards are provided on both sides of the inner housing body near the bottom along the Y-axis direction. The limit cards can move vertically in the guide grooves.

[0012] As a further improvement of the present invention, limit grooves are provided on both sides of the limit seat along the X-axis direction. Limit plates are provided on both sides of the bottom of the clamping seat along the X-axis direction. The limit plates are installed in the limit grooves.

[0013] As a further improvement of the present invention, two outer housing limit bumps are further provided on the outside of the limit seat. Rotating limit bumps are respectively provided on the rotating latch body on both sides of the rotating handle on the side of the positive X-axis direction.

[0014] As a further improvement of the present invention, contact pressing pieces are provided on both sides of the clamping seat along the Y-axis direction. The middle of the contact pressing piece protrudes from the clamping seat and there is a gap between the contact pressing piece and the clamping seat. The flange is pressed on the contact pressing piece.

[0015] As a further improvement of the present invention, a retaining edge is further provided on the card seat outside the contact pressing plate.

[0016] As a further improvement of the present invention, the two upper card slots are respectively located on both sides of the inner shell body along the Y-axis direction, and the two lower card slots are respectively located on both sides of the inner shell body along the X-axis direction.

[0017] By means of the above solutions, the present invention has at least the following advantages:

[0018] 1. The present invention realizes the locking of the inner shell by the rotation of the rotating card. When in use, the rotating card is locked with the upper card slot, and its main function is to prevent the injection needle from advancing for the second time during use, reducing the second pain of the patient.

[0019] 2. After the use of the present invention is completed, the rotating card is rotated to unlock, so that the inner shell drives the drug delivery component to move upward. Then the rotating card is locked with the lower card slot. The locking effect between the rotating card and the inner shell is good. Its main function is to prevent the injection needle from protruding outside, causing bacterial infection after stabbing medical staff and recyclers, and preventing the spread of bacteria.

[0020] 3. The present invention can lock the flange edge through the drug delivery card board, so that the inner shell drives the drug delivery component to move synchronously. Its main function is to prevent the reduction of the needle insertion depth during use and deepen the pain of the patient.

[0021] 5. The rotating card of the present invention is provided with a rotating handle structure, which will be more relaxed and more in line with the human body's habitual operation during use.

[0022] 6. The rotating handle on one side of the rotating card of the present invention is provided with a movable fastening opening, which can be fastened to each other during use, and has a reasonable clamping force on the upper card slot and the lower card slot.

[0023] 7. The card edge of the rotating card of the present invention, as well as the upper card slot and the lower card slot, are all acute-angle edges, which are more reasonably fastened and locked during assembly, and can reduce the length of the second needle insertion.

[0024] 8. The locking structure of the drug delivery card board on the flange edge of the present invention can reduce the needle insertion caused by the tolerance of the drug delivery component.

[0025] 9. The drug delivery card board of the present invention has a buffering treatment for the drug delivery component, that is, the structure setting that the flange edge of the drug delivery card board presses against the contact pressing edge can solve the loss to the pharmaceutical factory caused by the rupture or fragmentation of the flange edge during assembly.

[0026] 10. The limiting structure formed by the limiting plate of the inner shell and the limiting groove of the outer shell of the present invention can reduce the length limit of the second needle insertion.

[0027] 11. The outer shell limiting bumps on the outer shell of the present invention and the rotation limiting bumps on the rotating card are located closer to one side, further limiting the risk of accidental triggering during transportation and operation.

[0028] 12. The function of the protective angle of the present invention enables medical staff to more conveniently observe the injection state during operation.

[0029] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and be able to implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines with the drawings to elaborate in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0031] Figure 1 is a schematic structural diagram of the present invention in the first usage state;

[0032] Figure 2 is a schematic structural diagram of the present invention in the second usage state;

[0033] Figure 3 is Figure 1 the internal structural diagram of;

[0034] Figure 4 is Figure 2 the internal structural diagram of;

[0035] Figure 5 is the exploded structural diagram of the present invention;

[0036] Figure 6 is Figure 5 the structural diagram of the drug delivery component in;

[0037] Figure 7 is Figure 5 the structural diagram of the rotating card in;

[0038] Figure 8 is Figure 7 the front view of;

[0039] Figure 9 is Figure 5 the structural diagram of the inner shell in;

[0040] Figure 10 is Figure 5 the structural diagram of the outer shell in.

[0041] Among them, the meanings of the reference numerals in the figures are as follows.

[0042] 1 Administration component 2 Protective cap

[0043] 3 Elastic member 4 Rotating clamp

[0044] 5 Inner housing 6 Outer housing

[0045] 11 Pusher 12 Flange

[0046] 13 Administration cylinder 14 Injection needle

[0047] 41 Rotating clamp body 42 Clamping edge

[0048] 43 Rotating handle 44 Rotating limit bump

[0049] 45 Contact bump 46 Clamping claw

[0050] 51 Inner housing body 52 Card seat

[0051] 53 Administration card board 54 Contact pressing piece

[0052] 55 Baffle 56 Limiting plate

[0053] 57 Upper card slot 58 Lower card slot

[0054] 59 Limiting card

[0055] 61 Outer housing body 62 Limiting seat

[0056] 63 Limiting groove 64 Outer housing limiting bump

[0057] 65 Guide groove 66 Protective corner

[0058] 67 Top plate Specific embodiments

[0059] The following will further describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0060] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0061] Embodiment

[0062] As Figures 1 to 10 shown,

[0063] A rotary anti-needle-prick syringe includes a drug delivery assembly 1, a protective cap 2, an elastic member 3, a rotary lock 4, an inner housing 5 and an outer housing 6. The outer housing 6 includes an outer housing body 61 in a cylindrical structure. A top plate 67 is provided at the top of the outer housing body 61. A limit seat 62 is provided on the top plate 67. A protective corner 66 is provided at the bottom of the outer housing body 61. The inner diameter of the protective corner 66 is smaller than the inner diameter of the outer housing body 61. The inner housing 5 includes an inner housing body 51 in a cylindrical structure. A clamping seat 52 is provided at the top of the inner housing body 51. The clamping seat 52 is installed on the limit seat 62. The inner housing body 51 is installed inside the outer housing body 61. An elastic member 3 is provided in contact between the bottom of the inner housing body 51 and the protective corner 66. Among them, the elastic member 3 can be a spring or the like. On both sides of the clamping seat 52 along the X-axis direction, drug delivery clamping plates 53 are provided. An upper clamping groove 57 is provided on the inner housing body 51 near the clamping seat 52. A lower clamping groove 58 is provided on the inner housing body 51 near the bottom. The rotary lock 4 includes a rotary lock body 41. The rotary lock body 41 is installed in the cavity between the limit seat 62 and the top plate 67. On both sides of the rotary lock body 41 along the Y-axis direction, clamping edges 42 are provided. On both sides of the rotary lock body 41 along the X-axis direction, rotary handles 43 are provided. The clamping edges 42 can be clamped with the upper clamping groove 57 or the lower clamping groove 58. Both the clamping edges 42 and the upper clamping groove 57 or the lower clamping groove 58 are acute edges. The drug delivery assembly 1 includes a push rod 11 and a drug delivery cylinder 13 in a cylindrical structure. The drug delivery cylinder 13 is installed inside the inner housing body 51. The push rod 11 is installed inside the drug delivery cylinder 13. A flange 12 is provided at the top of the drug delivery cylinder 13. The flange 12 is installed on the clamping seat 52 and can be clamped with the drug delivery clamping plates 53. A syringe needle 14 is installed at the bottom of the drug delivery cylinder 13. A protective cap 2 is provided at the bottom of the drug delivery cylinder 13. The protective cap 2 is sleeved on the outside of the syringe needle 14.

[0064] Preferably, a contact bump 45 is protrudingly provided on the inner wall of the rotation handle 43 on one side along the positive direction of the X-axis. The function of the contact bump 45 is that when the clamping edge 42 of the rotation card 4 is clamped into the upper card slot 57 or the lower card slot 58, the contact bump 45 with a protruding structure can contact the outer wall of the inner shell body 51, increasing the friction between the rotation card 4 and the inner shell 5 and improving the firmness of the clamping connection.

[0065] Preferably, a movable snap-fit opening is provided at the rotation handle 43 on one side along the negative direction of the X-axis. The movable snap-fit opening includes two snap-fit claws 46 that snap fit with each other. Through the structural setting of the movable snap-fit opening, the rotation card body 41 has a certain tensioning function, enabling the rotation card 4 to be more conveniently clamped into or released from the upper card slot 57 or the lower card slot 58.

[0066] Preferably, guide grooves 65 are provided on both sides of the outer shell body 61 along the Y-axis direction, and limit cards 59 are provided on both sides of the inner shell body 51 near the bottom along the Y-axis direction. The limit cards 59 can move vertically in the guide grooves 65.

[0067] Preferably, limit grooves 63 are provided on both sides of the limit seat 62 along the X-axis direction, and limit plates 56 are provided on both sides of the bottom of the card seat 52 along the X-axis direction. The limit plates 56 are installed in the limit grooves 63.

[0068] Preferably, two outer shell body limit bumps 64 are further provided on the outer side of the limit seat 62, and rotation limit bumps 44 are respectively provided on the rotation card body 41 on both sides of the rotation handle 43 on one side along the positive direction of the X-axis.

[0069] Preferably, contact pressure pieces 54 are provided on both sides of the card seat 52 along the Y-axis direction. The middle of the contact pressure piece 54 protrudes from the card seat 52 and there is a gap between the contact pressure piece 54 and the card seat 52. The flange edge 12 is pressed against the contact pressure piece 54.

[0070] When pressing the drug delivery assembly 1, the drug delivery cylinder 13 is forced by an external force to open the drug delivery card plate 53 outward. The contact pressure piece 54 is forced downward, causing the lower gap, i.e., the elastic force groove, to deform. When the drug delivery cylinder 13 is further pressed downward, the drug delivery card plate 53 rebounds and clamps onto the flange edge 12.

[0071] When the flange edge 12 is clamped into the drug delivery card plate 53, after the contact pressure piece 54 rebounds, relying on the elastic force of plastic deformation, the drug delivery card plate 53 is further tightened against the flange edge 12.

[0072] Preferably, a retaining edge 55 is further provided on the card seat 52 outside the contact pressure piece 54. The retaining edge 55 can play a certain role in position limitation and protection for the flange edge 12.

[0073] Preferably, the two upper card slots 57 are respectively located on both sides of the inner shell body 51 along the Y-axis direction, and the two lower card slots 58 are respectively located on both sides of the inner shell body 51 along the X-axis direction.

[0074] The assembly sequence of a rotary anti-needle-prick syringe according to the present invention:

[0075] 1. First, take the outer shell 6 and the elastic member 3, and place the elastic member 3 parallel in the outer shell body 61.

[0076] 2. Take the rotary card 4 and directly insert it parallel into the cavity between the limit seat 62 and the top plate 67, and then rotate the rotary card 4 45 degrees to the right, so that one of the rotary limit bumps 44 is rotated to the outer shell limit bump 64.

[0077] 3. Take the inner shell 5 and insert it into the assembled rotary card. The rotary card opens, and the inner shell 5 is strongly pressed through. The elastic member 3 is compressed, and the rotary card 4 rebounds to the upper card slot 57 by its own elastic force, and the assembly is completed.

[0078] 4. Assemble the drug delivery component 1. First, place the drug delivery cylinder 13 with the liquid medicine parallel in the inner shell 5, press the drug delivery cylinder 13 forcefully, pass the flange 12 through the drug delivery card plate 53, the drug delivery card plate 53 opens outwards, the drug delivery cylinder 13 continues to move downwards, press the flange 12 to contact the pressing piece 54, the pressing piece 54 deforms towards the bottom gap, the force receiving point of the outer shell 6 rebounds, and the flange 12 is clamped to the drug delivery card plate 53 and pressed tightly. After the drug delivery cylinder 13 is assembled, then assemble the push rod 11.

[0079] The working process of a rotary anti-needle-prick syringe according to the present invention:

[0080] Figure 1 It is a schematic diagram of the state during use, Figure 2 It is a schematic diagram of the state after use.

[0081] 1. Pull off the protective cap 2. After the nurse picks up the assembled syringe and pierces the injection position of the patient, push the push rod 11 by hand to inject the liquid medicine into the patient's body. After the injection is completed, use hand to forcefully turn the rotary handle 43 of the rotary card 4 to the left, so that the rotary handle 43 of the rotary card 4 passes through the outer shell limit bump 64, and after a 90-degree movement along the circle of the inner shell, that is, the rotary limit bump 44 on the left side of the rotary handle 43 is rotated to be parallel to the X-axis direction and then stops.

[0082] 2. The rotary card 4 opens, that is, the card edge 42 leaves the upper card slot 57, the force of the elastic member 3 is released, the inner shell 5 moves linearly upwards in the guide groove 65 of the outer shell 6, and stops when the limit card 59 moves to the top end of the guide groove 65. The card edge 42 of the rotary card 4 rebounds by its own resilience and then is clamped into the lower card slot 58.

[0083] 3. When the clamping edge 42 of the rotating clamp 4 is clamped into the lower clamping groove 58 and the inner housing 5 is limited, after the injection needle 14 is retracted into the outer housing 6, it provides protection to prevent being pricked by the needle.

[0084] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0085] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection or an electrical connection: it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0086] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A rotary anti - puncture syringe, comprising a drug - delivery assembly (1), a protective cap (2), an elastic member (3), a rotary latch (4), an inner housing (5) and an outer housing (6), characterized in that, The outer housing (6) includes an outer - housing body (61) with a cylindrical structure. The top of the outer - housing body (61) is provided with a top plate (67). A limit seat (62) is arranged on the top plate (67). The bottom of the outer - housing body (61) is provided with a protective corner (66), and the inner diameter of the protective corner (66) is smaller than the inner diameter of the outer - housing body (61); The inner housing (5) includes an inner - housing body (51) with a cylindrical structure. The top of the inner - housing body (51) is provided with a clamping seat (52). The clamping seat (52) is installed on the limit seat (62). The inner - housing body (51) is installed inside the outer - housing body (61). An elastic member (3) is arranged in contact between the bottom of the inner - housing body (51) and the protective corner (66). On both sides of the clamping seat (52) along the X - axis direction, drug - delivery clamping plates (53) are arranged. An upper clamping groove (57) is arranged on the inner - housing body (51) near the clamping seat (52). A lower clamping groove (58) is arranged on the inner - housing body (51) near the bottom; The rotary latch (4) includes a rotary - latch body (41). The rotary - latch body (41) is installed in the cavity between the limit seat (62) and the top plate (67). On both sides of the rotary - latch body (41) along the Y - axis direction, clamping edges (42) are arranged. On both sides of the rotary - latch body (41) along the X - axis direction, rotary handles (43) are arranged. The clamping edges (42) can be clamped with the upper clamping groove (57) or the lower clamping groove (58); The drug - delivery assembly (1) includes a push rod (11) and a drug - delivery cylinder body (13) with a cylindrical structure. The drug - delivery cylinder body (13) is installed inside the inner - housing body (51). The push rod (11) is installed inside the drug - delivery cylinder body (13). The top of the drug - delivery cylinder body (13) is provided with a flange edge (12). The flange edge (12) is installed on the clamping seat (52), and the flange edge (12) can be clamped with the drug - delivery clamping plates (53). The bottom of the drug - delivery cylinder body (13) is installed with an injection needle (14). A protective cap (2) is arranged at the bottom of the drug - delivery cylinder body (13). The protective cap (2) is sleeved outside the injection needle (14); An active fastening opening is arranged at the rotary handle (43) on the negative X - axis direction side. The active fastening opening includes two mutually - fastening fastening claws (46); Guide grooves (65) are arranged on both sides of the outer - housing body (61) along the Y - axis direction. Limit cards (59) are arranged on both sides of the inner - housing body (51) near the bottom along the Y - axis direction. The limit cards (59) can move vertically in the guide grooves (65).

2. The rotational anti-needle-prick syringe according to claim 1, characterized in that, Contact bumps (45) protrude from the inner wall of the rotary handle (43) on the positive X - axis direction side.

3. A rotary needle-stick-proof syringe according to claim 1, characterized in that: On both sides of the limit seat (62) along the X-axis direction, limit grooves (63) are provided. On both sides of the bottom of the card seat (52) along the X-axis direction, limit plates (56) are provided, and the limit plates (56) are installed in the limit grooves (63).

4. The rotational anti-needle-prick syringe according to claim 1, wherein On the outer side of the limit seat (62), two housing limit bumps (64) are further provided. Rotation limit bumps (44) are respectively provided on the rotation card bodies (41) on both sides of the rotation handle (43) on the side along the positive X-axis direction.

5. The rotatable anti-needle-prick syringe according to claim 1, wherein On both sides of the card seat (52) along the Y-axis direction, contact pressure pieces (54) are provided. The middle part of the contact pressure piece (54) protrudes from the card seat (52) and there is a gap between the contact pressure piece (54) and the card seat (52). The flange edge (12) is pressed against the contact pressure piece (54).

6. The rotational anti-needle-prick syringe according to claim 5, wherein, On the card seat (52) outside the contact pressure piece (54), a retaining edge (55) is further provided.

7. The rotational anti-needle-prick syringe according to claim 1, wherein The two upper card slots (57) are respectively located on both sides of the inner housing body (51) along the Y-axis direction, and the two lower card slots (58) are respectively located on both sides of the inner housing body (51) along the X-axis direction.

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