Anti-needling syringe

Abstract

The utility model relates to an anti-needling injector which comprises a needle head, a needle cylinder, a needle sleeve and a fixing mechanism. The needle is arranged at the end of the needle cylinder. A through hole is formed in the lower end surface of the needle sleeve; the size of the through hole is larger than the maximum outer diameter of the needle; the needle sleeve is connected with the needle cylinder through a fixing mechanism; by changing the relative position of the needle sleeve and the needle cylinder, the needle head can penetrate through the through hole and is exposed in the working environment; or the needle head can be hidden in the needle sleeve. The rectangular hole of the needle sleeve penetrates through the side wing of the needle head and then is fixedly installed on the needle cylinder through the fixing mechanism and the needle sleeve, the needle head can be completely exposed, and a worker can conveniently and normally use the syringe. The needle sleeve is screwed or rotated, the needle sleeve is fixedly installed on the needle cylinder through the fixing mechanism, the needle head can be completely hidden in the needle sleeve, and when the needle head is in a discarded state, the needle head can be prevented from stabbing a worker; and in a needle preparation state, the needle preparation device can be used for needle preparation operation preparation of workers.

Description

Technical Field

[0001] This utility model relates to the field of medical syringe technology, and in particular to a needle-puncture resistant syringe. Background Technology

[0002] Currently, syringes used in clinical practice have a separate structure for the needle, needle cap, and syringe barrel. Medical staff must remove the needle cap before preparing medication or administering injections. In practice, because the needle cap and needle are small and tightly connected, removing the cap often results in accidentally pulling the needle off as well, making the process very inconvenient. After medication preparation or injection, to prevent cross-contamination between the external environment and the needle, medical staff must use one hand to recap the needle. However, during this recapping process, the small size of both the needle and needle cap frequently leads to misalignment, wasting time and increasing the risk of hand injuries and occupational exposure.

[0003] To address the aforementioned issues, some researchers have proposed solutions by altering the needle cap or needle plug structure, increasing the opening of the needle cap, and reducing the difficulty of reattaching the needle cap with one hand. This can effectively prevent the needle from pricking the finger. However, this syringe is not portable, and the needle is not easy to remove after injection.

[0004] Some researchers have also developed a retractable, self-destructing disposable sterile syringe. This type of syringe automatically retracts the needle into the syringe after injection, preventing both syringe reuse and needlestick injuries. However, this syringe suffers from poor retraction stability, frequently experiencing problems such as premature needle activation, incomplete activation, and leakage. Furthermore, some self-destructing syringes are complex in manufacturing processes, incorporating internal springs. Therefore, given the same raw material costs as ordinary syringes, quality is difficult to guarantee, and some syringes exhibit issues such as loose needle-syringe connections, leading to needle detachment during injection. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides an anti-needle-puncture syringe, the technical solution of which is as follows:

[0006] A needle-proof syringe includes a needle, a syringe barrel, a needle sheath, and a fixing mechanism; the needle is disposed at the end of the syringe barrel; the needle sheath is configured as a cylindrical shape with an open upper end and a through hole on its lower end face; the size of the through hole is larger than the maximum outer diameter of the needle; the needle sheath and the syringe barrel are connected by the fixing mechanism; by changing the relative position of the needle sheath and the syringe barrel, the needle can pass through the through hole and be exposed to the working environment; or the needle can be concealed inside the needle sheath.

[0007] Furthermore, the fixing mechanism includes a protruding strip unit disposed on the outer side of the syringe and a slot unit disposed on the inner side of the needle sleeve; the protruding strip unit can be fitted into the slot unit, and the protruding strip unit can be rotated in and out along the slot unit.

[0008] Furthermore, the number of fixing mechanisms is ≥2; the convex strip units are arranged vertically at intervals along the outer side of the syringe; the slot units are arranged vertically at intervals along the inner side of the needle sleeve; and the convex strip unit located at the bottom is located at the lower end face of the syringe, and the distance between it and at least one convex strip unit above it is ≥ the length of the needle.

[0009] Furthermore, the convex strip unit includes three convex strip segments, each of which has a length of 1 / 6 of the syringe circumference; the convex strip segments are evenly spaced and circumferentially arranged on the outer side of the syringe; the slot unit includes three slot segments, each of which has a length of 1 / 6 of the needle sheath circumference; the slot segments are evenly spaced and circumferentially arranged on the inner side of the needle sheath.

[0010] Furthermore, the needle has a side wing near its root; after the needle is fixedly installed with the syringe, an installation gap is formed between the side wing and the bottom end face of the syringe, and the width of the installation gap is greater than the wall thickness of the lower end face of the needle sleeve.

[0011] Furthermore, the side wings are symmetrically located on both sides of the root of the needle and lie in the same plane; the side wings are parallel to the bevel of the needle tip.

[0012] Furthermore, the through hole on the lower end face of the needle sleeve is a rectangular hole with a central circular hole, and the width of the rectangular hole is greater than the total width of the side wings.

[0013] Furthermore, after the needle sleeve is installed on the outer side of the syringe through a fixing mechanism, the lower end face of the needle sleeve is located in the installation gap between the needle tip side wing and the bottom end face of the syringe. Under external force, the needle sleeve can rotate at a certain angle within the installation gap.

[0014] Furthermore, the needle sheath has an observation window or observation groove; after the needle sheath is fully fitted with the syringe, the scale line of the syringe is located within the observation window or observation groove.

[0015] Furthermore, the needle sheath is made of transparent or light-blocking material, and the length of the needle sheath is ≥ the length of the syringe. Under the constraint of the fixing mechanism, the needle sheath can rotate 60° relative to the syringe in the forward or reverse direction.

[0016] Based on the above technical solution, this utility model has the following beneficial effects:

[0017] After the rectangular hole of the needle sheath passes through the side wing of the needle tip, the needle sheath is fixedly installed on the syringe by the fixing mechanism, so that the needle tip can be fully exposed, making it convenient for staff to use the syringe normally to complete operations such as drawing up medicine and injecting.

[0018] Twisting or rotating the needle sleeve causes it to rotate at a certain angle within the installation gap, thereby misaligning the rectangular hole with the side wing. Pushing the needle sleeve out or twisting it off will remove the needle, effectively preventing staff from being pricked when disposing of discarded needles.

[0019] Twisting or rotating the needle sheath secures it to the syringe via a fixing mechanism, allowing the needle to be completely concealed inside the sheath. When in its discarded state, this prevents needle pricks from injuring workers; when in its spare state, it prepares the needle for workers' needle preparation. Attached Figure Description

[0020] Figure 1 : Schematic diagram of the syringe structure in the embodiment;

[0021] Figure 2 : A top view of the syringe in the embodiment;

[0022] Figure 3 : Schematic diagram of the needle sleeve structure in the embodiment;

[0023] Figure 4 : Schematic diagram of the bottom structure of the needle sleeve in the embodiment;

[0024] Figure 5 : Schematic diagram of the longitudinal section structure of the needle sleeve in the embodiment;

[0025] Figure 6 : Schematic diagram of the cross-sectional structure of the needle sleeve in the embodiment;

[0026] Figure 7 : A schematic diagram of the relationship between the needle sheath and the syringe barrel in the embodiment, showing the state in which the protrusion and the groove are completely misaligned;

[0027] Figure 8 : Figure 7 A schematic diagram of the cross-section;

[0028] Figure 9 : A schematic diagram of the connection structure between the protrusion and the slot in the embodiment of the relationship between the needle sheath and the syringe barrel;

[0029] Figure 10 : Figure 9 A schematic diagram of the cross-section;

[0030] Figure 11 : A schematic diagram of the safe connection structure between the protrusion and the slot in the embodiment of the relationship between the needle sheath and the syringe barrel;

[0031] Figure 12 : Figure 11A schematic diagram of the cross-section;

[0032] Figure 13 : Schematic diagram of syringe retraction into needle sheath in the embodiment Figure 1 ;

[0033] Figure 14 : Schematic diagram of syringe retraction into needle sheath in the embodiment Figure 2 ;

[0034] Figure 15 : A schematic diagram of the positional relationship between the needle tip and the rectangular hole when the syringe is retracted into the needle sheath in the embodiment;

[0035] Figure 16 : A schematic diagram illustrating the adjustment of the needle's lateral wing direction when the needle is removed from the syringe in the embodiment;

[0036] Figure 17 : Schematic diagram of the positional relationship between the needle and the rectangular hole when the needle is removed from the syringe in the embodiment.

[0037] Symbol Explanation

[0038] 1-Needle tip, 101-Flank;

[0039] 2- Syringe;

[0040] 3-Needle sleeve, 301-Rectangular hole, 302-Observation window;

[0041] 4- Installation gap;

[0042] 501 - Raised strip section, 502 - Slot section. Detailed Implementation

[0043] The present invention will now be described in detail with reference to the accompanying drawings and by way of embodiments.

[0044] As attached Figure 1 - Appendix Figure 17 As shown in the figure, this embodiment describes an anti-needle-puncture injector, including a needle 1, a syringe 2, a needle sheath 3, and a fixing mechanism.

[0045] The needle 1 has a wing 101 near its root.

[0046] After the needle 1 and the syringe 2 are fixedly installed, the side wing 101 and the bottom end face of the syringe 2 form an installation gap 4.

[0047] Preferably, the gap dimension of the installation gap 4 is greater than the wall thickness of the lower end face of the needle sleeve 3.

[0048] Preferably, the side wings 101 are symmetrically located on both sides of the root of the needle 1 and are in the same plane.

[0049] Preferably, the side wing 101 is parallel to the beveled tip of the needle 1.

[0050] The syringe 2 has injection scale lines on its outer surface.

[0051] The needle sleeve 3 is a cylindrical shape with one end open, that is, the upper end face of the needle sleeve 3 is open.

[0052] The lower end face of the needle sleeve 3 is provided with a rectangular hole 301 having a central circular hole, and the width of the rectangular hole 301 is greater than the total width of the side wing 101.

[0053] A fixing mechanism is provided between the syringe 2 and the needle sleeve 3, which can fix the needle sleeve 3 at a set position on the outer wall of the syringe 2.

[0054] The fixing mechanism includes a protruding strip unit disposed on the outer side of the syringe 2 and a slot unit disposed on the inner side of the needle sleeve 3.

[0055] The raised strip unit is composed of raised strip segments 501. In this embodiment, the raised strip segments 501 are preferably set to 3, and the raised strip segments 501 are arranged along the same cross-sectional plane of the syringe 2.

[0056] The raised strips 501 are evenly spaced on the outer side of the syringe 2. The length of each raised strip 501 is 1 / 6 of the circumference of the syringe 2, that is, the angle of each arc-shaped raised strip 501 is 60°.

[0057] The slot unit is composed of slot segments 502. In this embodiment, the slot segments 502 are preferably set to 3, and the slot segments 502 are arranged along the same cross-sectional plane of the needle sleeve 3.

[0058] The slot segments 502 are evenly spaced on the inner side of the needle sleeve 3. The length of each slot segment 502 is 1 / 6 of the circumference of the needle sleeve 3, that is, the angle of each arc-shaped slot segment 502 is 60°.

[0059] The raised strip unit and the slot unit are fitted together. During the locking operation, adjust the position between the needle sleeve 3 and the syringe 2 as needed. At the set position, rotate the needle sleeve 3 or the syringe 2 to screw the raised strip unit into the slot unit and embed it inside the slot unit. During the loosening operation, rotate the raised strip unit or the slot unit clockwise or counterclockwise to disengage them.

[0060] When manufacturing the convex strip unit and the slot unit, the dimensions of the two should be set precisely so that the gap after they are fitted together is small, for example, the gap is ≤0.1mm, so that the two can be stably fitted and fixed.

[0061] In this embodiment, during use, the syringe should be rotated and the angle of the needle 1 should be adjusted in advance according to the needs of operation, so that the rectangular hole 301 of the needle sleeve 3 can pass through the needle side wing 101 and move to the set position without obstruction, and then complete the relative fixation with the syringe 2.

[0062] In this embodiment, as a preferred option:

[0063] 1. The needle sheath 3 has an observation window 302 on its side. The observation window 302 can be rectangular or oval, etc. With this setting, when the needle tip 1 is in a fully exposed state, after the needle sheath 3 is rotated and fixed to the syringe 2, the upper and lower ends of the observation window 302 are flush with the upper and lower ends of the scale lines of the syringe 2, and the scale lines are fully exposed in the observation window 302, which facilitates the injection operation of medical personnel and allows them to observe the state of the medicine in the syringe 2 at any time during use.

[0064] 2. At least two fixing mechanisms should be provided. The raised strip units are arranged vertically and horizontally on the outer side of the syringe 2, and the slot units are arranged vertically and horizontally on the inner side of the needle sleeve 3.

[0065] The lower fixing mechanism should be set close to the lower end face of the syringe 2; the upper fixing mechanism should be set at a designated position on the outer side of the syringe 2 according to actual usage requirements, and the distance between the lower fixing mechanism and at least one upper fixing mechanism should be ≥ the length of the needle 1.

[0066] 3. The needle sleeve 3 is made of transparent material for easy use by staff;

[0067] 4. The length of the needle sheath 3 can be adjusted to suitably, for example, to be the same as the length of the syringe 2, and to be made of light-shielding material for operations such as extracting and injecting drugs that require light protection.

[0068] The following is an illustrative description of the use of the syringe described in the embodiments.

[0069] The following steps are not a logical sequence of operations; that is, the steps can be either consecutive or independent of each other.

[0070] S1, fix the needle 1 onto the syringe 2.

[0071] S2, take out the needle sleeve 3. After the rectangular hole 301 of the needle sleeve 3 passes through the side wing 101 of the needle 1, it is rotated and fixed by the fixing mechanism. The bottom end face of the needle sleeve 3 is embedded in the installation gap 4. At this time, the needle 1 is fully exposed, and the staff can use the syringe normally to complete the operation of drawing medicine, injection and other tasks.

[0072] S3, twist or rotate the needle sleeve 3 to make the needle sleeve 3 rotate in the opposite direction at a certain angle within the installation gap 4, thereby making the rectangular hole 301 and the side wing 101 misaligned; or the operator manually adjusts and rotates the needle to make the side wing 101 and the rectangular hole 301 misaligned, and pushes or twists the needle sleeve 3 outward to remove the needle 1, so as to avoid injuring the staff when disposing of the waste needle.

[0073] S4, twist or rotate the needle sleeve 3 to completely conceal the needle 1 inside the needle sleeve 3, rotate and fix the needle sleeve 3 through the fixing mechanism. At this time, the needle sleeve 3 can be discarded to avoid needle injury to the staff, and can be prepared for the staff to prepare the needle for the work.

[0074] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A needle-stick resistant syringe, characterized by, The needle, the needle cylinder, the needle sleeve, and the fixing mechanism are included. The needle is arranged at the end of the needle cylinder. The needle sleeve is arranged as an open-ended cylinder, and a through hole is arranged at the lower end surface of the needle sleeve, the width of the through hole is greater than the maximum outer diameter of the needle. The needle sleeve and the needle cylinder are connected through the fixing mechanism, and the needle can be exposed to the working environment by changing the relative position of the needle sleeve and the needle cylinder, or the needle can be hidden inside the needle sleeve.

2. The needle-stick-proof syringe according to claim 1, wherein The fixing mechanism includes a protrusion unit arranged on the outer side of the needle cylinder and a clamping groove unit arranged on the inner side of the needle sleeve. The protrusion unit can be embedded with the clamping groove unit, and the protrusion unit can be rotated into and out of the clamping groove unit.

3. The needle-stick-proof syringe according to claim 2, wherein The number of fixing mechanisms is greater than or equal to 2. The protrusion units are arranged in an upper and lower interval on the outer side of the needle cylinder. The clamping groove units are arranged in an upper and lower interval on the inner side of the needle sleeve. And the lowermost protrusion unit is arranged at the lower end surface of the needle cylinder, and the distance between the lowermost protrusion unit and the protrusion unit above it is greater than or equal to the length of the needle.

4. The needle-stick-proof syringe according to claim 2 or 3, wherein The protrusion unit includes three protrusion segments, and the length of each protrusion segment is 1 / 6 of the circumference of the needle cylinder. The protrusion segments are uniformly spaced and arranged in a circumferential ring on the outer side of the needle cylinder. The clamping groove unit includes three clamping groove segments, and the length of each clamping groove segment is 1 / 6 of the circumference of the needle sleeve. The clamping groove segments are uniformly spaced and arranged in a circumferential ring on the inner side of the needle sleeve.

5. The needle-stick-proof syringe according to any one of claims 1-3, wherein The needle is provided with a wing near the root thereof. After the needle and the needle cylinder are fixedly installed, the wing and the bottom end surface of the needle cylinder form an installation gap, and the width of the installation gap is greater than the wall thickness of the lower end surface of the needle sleeve.

6. The needle-stick-proof syringe according to claim 5, wherein The wings are symmetrically located on both sides of the root of the needle and are located in the same plane. The wing is parallel to the bevel of the needle tip.

7. The needle-stick-proof syringe according to claim 5, wherein The through hole of the lower end surface of the needle sleeve is a rectangular hole with a center hole, and the width of the rectangular hole is greater than the total width of the wing.

8. The needle-stick-proof syringe according to claim 5, wherein After the needle sleeve is installed on the outer side of the needle cylinder through the fixing mechanism, the lower end surface of the needle sleeve is located in the installation gap between the wing of the needle and the bottom end surface of the needle cylinder, and under the action of external force, the needle sleeve can rotate at a certain angle in the installation gap.

9. The needle-stick-proof syringe according to claim 5, wherein The needle sleeve is provided with an observation window or an observation groove, and after the needle sleeve and the needle cylinder are completely installed, the scale line of the needle cylinder is located in the observation window or the observation groove.

10. The needle-stick-proof syringe according to claim 5, wherein The needle sleeve is made of transparent material or light shielding material; the length of the needle sleeve is equal to or greater than the length of the needle cylinder; under the restriction of the fixing mechanism, the needle sleeve can rotate 60° forward or reversely relative to the needle cylinder.

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