Anti-stabbing vein puncture needle protective sleeve

Abstract

The utility model discloses an anti-stabbing type vein puncture needle protective sleeve, which relates to the field of medical instruments and comprises a protective mechanism and an infusion needle mechanism, the protective mechanism is used for being sleeved on a hose connected with the infusion needle mechanism and can slide on the hose, and a needle handle is arranged on the infusion needle mechanism; wherein the protection mechanism comprises a sliding groove frame, the sliding groove frame comprises an inlet end and a locking end, a notch is formed in the sliding groove frame in the axial direction, the infusion needle mechanism can enter the sliding groove frame from the inlet end and drive the needle handle to slide along the notch, the needle handle protrudes out of the notch, and when the needle handle enters the locking end, the infusion needle mechanism can be locked in the sliding groove frame. The protection mechanism is arranged on the hose connected with the infusion needle mechanism in a sleeved mode, the sliding groove frame is arranged to allow the infusion needle mechanism to slide, and the locking end and the needle handle are locked, so that the purposes that the applied force needed by locking is reduced, the stability of the locking state is improved, and even the locking state is achieved are achieved.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a puncture-proof venipuncture needle protective cover. Background Art

[0002] With the development of the medical industry and the advancement of medical device technology, medical safety has become a focus of social concern. Various medical devices are increasingly developing towards characteristics such as safe use, convenient operation, low price, and good effect. Disposable venipuncture needles, a type of medical device that is extremely frequently used and widely used in the medical industry, are no exception. Traditional venipuncture needles consist of a needle tip protection cover, a needle tube, a needle handle, a flexible tube, a needle seat, and a needle seat cap. After use, the patient removes the needle and the medical staff discards the needle. Among the adverse events of needlestick injuries, the most common is secondary puncture injuries to medical staff caused by the exposed venipuncture needle after use. This poses a high risk of infectious disease transmission, poses a great threat to medical staff, and presents unnecessary and serious safety hazards. To meet the demand for safe use and reduce the risk of infection, a number of needle tip protection covers with anti-needlestick functions have gradually appeared on the market. Among them, the utility model disclosed in Chinese patent application (CN210205495U) is the most representative. This utility model provides a needle protection assembly, an anti-needlestick infusion needle, and an infusion set. The needle protection assembly includes a needle, a housing, and an elastic member. Among them, the elastic part is installed in the installation cavity, the elastic part is sleeved on the needle, and the needle has a first movement state and a second movement state under the elastic force of the elastic part. Among them, the first movement state is that the needle handle moves along the guide groove and is accommodated in the first limiting groove, and the needle can be penetrated into the puncture port. The second movement state is that the needle handle disengages from the first limiting groove and moves along the guide groove and allows the needle to be accommodated in the installation cavity, so that the needle can be placed in the installation cavity after use, avoiding the exposure of the needle after use, preventing the needle from accidentally pricking others, and effectively preventing blood infection.

[0003] In order to improve the ease of operation, the patent (CN 111773476 A) has a needle handle protection cover structure composed of two independent structures (shell and elastic member). Although this structure is simple to operate, it makes its production cost and vulnerability rate high. There is also the risk of accidental injury due to the elastic force of the elastic member. At the same time, the mechanism at the front end of the shell will also reduce the patient's comfort during infusion. Specifically, when using, one needs to pinch the needle handle with one hand and the protective device with the other hand. Because the gap is tightly squeezed, it requires a lot of force, and the needle handle is small and easy to slip out of the hand, which can easily cause the needle to fall or puncture. At the same time, the method of retracting the needle handle has the problem that the front end of the protective device is exposed to air, objects, etc. after draining or opening, and the sterility of the needle tip is reduced during retraction, causing infection in the patient and worsening the condition. Its protection method only relies on a large squeezing force to limit the displacement of the needle handle, and cannot be completely locked. It still has the risk of falling off due to special circumstances, causing the protective device to fail and causing secondary punctures.

[0004] In view of this, this application is hereby filed. Utility Model Content

[0005] The purpose of the utility model is to provide a puncture-proof venous puncture needle protective cover, which solves the problem of the existing technology that it cannot be completely locked and there is a risk of falling off by setting a protective mechanism on a hose connected to an infusion needle mechanism, providing a slide frame to allow the infusion needle mechanism to slide, and locking the locking end to the needle handle.

[0006] The embodiment of the utility model is achieved through the following technical solutions: The embodiment of the utility model provides an anti-stab type venipuncture needle protective cover, including a protection mechanism and an infusion needle mechanism, the protection mechanism is used to be sleeved on a hose connected to the infusion needle mechanism, the protection mechanism can slide on the hose, and the infusion needle mechanism is provided with a needle handle;

[0007] Among them, the protection mechanism includes a slide frame, which includes an entrance end and a locking end. The slide frame is provided with a slot along the axial direction. The infusion needle mechanism can enter the slide frame from the entrance end and drive the needle handle to slide along the slot. The needle handle protrudes outward from the slot. When the needle handle enters the locking end, the infusion needle mechanism can be locked in the slide frame.

[0008] Preferably, a limiting tooth is provided on one side of the notch of the locking end, and a positioning gap exists between the limiting tooth and the other side of the notch. A limiting platform is provided on the end face of the locking end, and the needle handle can enter the locking end through the positioning gap and contact the limiting platform. The limiting tooth and the limiting platform can lock the needle handle.

[0009] Preferably, the side of the limit tooth facing the limit platform is a horizontal structure, and the other side of the limit tooth facing the slot where it is located is an arc structure. The arc structure includes a guide end and a limit end. The guide end is arranged on one side of the entrance end of the slide frame, and the limit end is arranged on one side of the locking end of the slide frame. The distance between the limit tooth and the other side of the slot where it is located gradually decreases from the guide end to the limit end.

[0010] Preferably, a plurality of first guide mechanisms are provided on one side of the inlet end of the chute frame, each of which is provided on one side of the notch and extends along the other side of the notch. When the needle handle is locked at the locking end, the needle tip of the infusion needle mechanism is hidden between the chute frame and the first guide mechanism.

[0011] A first guiding gap exists between each first guiding mechanism and the other side of the slot where it is located, and the needle handle can pass through the first guiding gap and slide along the slot.

[0012] Preferably, two first guide mechanisms are provided, and the two first guide mechanisms are both provided on the same side of the notch, and the free end of each first guide mechanism is arc-shaped.

[0013] Preferably, a second guiding mechanism is further provided on the slide frame, and the second guiding mechanism and the limiting teeth are respectively provided on both sides of the slot, and a second guiding gap exists between the second guiding mechanism and the other side of the slot where it is located.

[0014] Preferably, the axial center line of the first guide slot overlaps with the axial center line of the second guide slot, and the axial center line of the first guide slot is parallel to the axial center line of the slide channel frame.

[0015] Preferably, the transverse width of the limiting end of the locking gap is smaller than the width of the needle handle.

[0016] Preferably, when the needle handle moves to the point where one side of the needle handle contacts the limiting latch and the other side of the needle handle contacts the side wall of the slot, the infusion needle mechanism fits into the free end of the second guide mechanism, and at this time the axial center line of the needle handle is parallel to or coincides with the axial center line of the locking gap.

[0017] Preferably, the free end of the second guiding mechanism is arc-shaped.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] 1. The present invention provides a puncture-proof venipuncture needle protective cover. The protective mechanism can be made of either a hard or soft material, preferably a hard material. The protective mechanism can be movably mounted on a flexible tube. When in use, the flexible tube is simply pulled to engage the infusion needle mechanism connected to the end of the flexible tube within the protective mechanism, thereby achieving stable isolation of the infusion needle mechanism and preventing leakage of the infusion needle mechanism. In the present invention, the infusion needle mechanism is provided with a needle handle that can engage with the protective mechanism, thereby ensuring that the entire infusion needle mechanism is stably engaged within the protective mechanism.

[0020] Specifically, the protective mechanism includes a slide frame. When the hose drives the infusion needle mechanism to slide, the connection end of the infusion needle mechanism and the hose will first enter the slide frame from the outer end of the protective mechanism, and then continue to slide in the slide frame. The needle handle will pass through the notch and always slide in the notch. When the needle handle slides to the locking end, the needle handle will be locked with the locking end. At this time, the entire infusion needle mechanism is covered by the slide frame, forming a stable engagement and isolation state. The protective mechanism of the embodiment of the utility model can be made of a hard material, so there is no risk of the needle tip puncturing the protective mechanism. At the same time, it is simple to operate. When the infusion needle mechanism slides in the notch, the resistance is reduced, and no large driving force is required, which is convenient to operate. At the same time, the locking end of the embodiment of the utility model cooperates with the needle handle to lock the infusion needle mechanism in the protective mechanism. The locking structure is stable and can prevent it from falling off.

[0021] 2. In the embodiment of the present invention, the locking end is provided with a limiting latch. A gap is formed between the limiting latch and the other side of the notch. A limiting platform is provided on the end surface of the locking end. When the needle handle enters the locking end through the positioning gap, the radial end surface of one end is limited by the limiting platform, and the other end is limited by the limiting latch. That is, the needle handle is locked between the limiting platform and the limiting latch, thereby achieving a locked lock of the infusion needle mechanism. The limiting latch is configured as a horizontal structure on the side facing the limiting platform and an arcuate structure on the other side facing the notch. This arcuate structure not only guides the needle handle when it enters the locking end, but also prevents the needle handle from exiting the positioning gap after entering the locking end, thereby allowing the limiting latch to lock the needle handle within the locking end.

[0022] 3. A plurality of first guiding mechanisms are provided, which can not only guide the position of the infusion needle mechanism during the sliding process in the protective mechanism, but also further isolate the locked needle tip, thereby improving the safety of the entire protective cover.

[0023] 4. A second guide mechanism is provided to cooperate with the first guide mechanism to jointly guide the sliding of the infusion needle mechanism in the protective mechanism. It is important that the second guide mechanism can cooperate with the limiting tooth. When the needle handle enters the locking gap, the infusion needle mechanism can be fitted with the free end of the second guide mechanism. In this way, the second guide mechanism and the limiting tooth can jointly limit the infusion needle mechanism, so that when the infusion needle mechanism enters the locking gap, it is parallel to the locking gap, thereby preventing the needle handle from being stuck in the locking gap and ensuring that the needle handle can smoothly enter the locking end.

[0024] In general, the embodiment of the present invention provides an anti-puncture type intravenous puncture needle protective cover by placing a protective mechanism on a hose connected to the infusion needle mechanism, providing a slide frame to allow the infusion needle mechanism to slide, and locking the locking end with the needle handle to achieve the purpose of reducing the force required for locking, improving the stability of the locking state, and even achieving a locked state. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of the protective cover provided in an embodiment of the present utility model in an installed locked state;

[0027] Figure 2 A schematic diagram of the structure of the protective cover before locking provided by an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of the protection mechanism structure provided by an embodiment of the utility model;

[0029] Figure 4 This is a schematic structural diagram of the locking state of the protection mechanism and the infusion needle mechanism provided in an embodiment of the utility model.

[0030] Markings and corresponding parts names in the accompanying drawings:

[0031] 1-protection mechanism, 2-infusion needle mechanism, 3-hose, 4-needle handle, 5-slide frame, 6-entrance end, 7-locking end, 8-notch, 9-limiting tooth, 10-locking gap, 11-limiting platform, 12-guide end, 13-limiting end, 14-first guide mechanism, 15-first guide gap, 16-second guide mechanism, 17-second guide gap, 18-side shelf, 19-needle bolt, 20-needle tip. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] Example

[0037] like Figure 1-2As shown, an embodiment of the utility model provides a puncture-proof venous puncture needle protective cover, which can provide a safe way to operate the venous puncture needle to avoid the risk of needle stick injuries to medical staff during operation, and also protect patients from unnecessary harm. It includes a protective mechanism 1 and an infusion needle mechanism 2. The protective mechanism 1 is used to isolate the infusion needle mechanism 2 and is usually mounted on a hose 3 connected to the infusion needle mechanism 2. The protective mechanism 1 can slide on the hose 3. When the protective mechanism 1 needs to be mounted on the infusion needle mechanism 2, the operator only needs to pull the hose 3, and the hose 3 will drive the infusion needle mechanism 2 to move into the protective mechanism 1. A needle handle 4 is provided on the infusion needle mechanism 2, and the needle handle 4 will slide on the protective mechanism 1 along with the infusion needle mechanism 2. The protective mechanism 1 includes a chute frame 5, which includes an entrance end 6 and a locking end 7. The chute frame 5 is provided with a notch 8 along its axial direction. The infusion needle mechanism 2 can enter the chute frame 5 from the entrance end 6 and drive the needle handle 4 to slide along the notch 8. The needle handle 4 protrudes from the notch 8. When the needle handle 4 enters the locking end 7, the infusion needle mechanism 2 can be locked in the chute frame 5. Specifically, the infusion needle mechanism 2 can enter from the entrance end 6 of the chute frame 5, and the needle handle 4 can slide in the notch 8. When the needle handle 4 moves to the locking end 7 of the chute frame 5, the infusion needle mechanism 2 can be locked in the chute frame 5, thereby fixing the position of the needle handle 4 and preventing it from being accidentally moved or exposed.

[0038] The protection mechanism 1 of the embodiment of the present invention can be made of a hard material, and the needle tip 20 will not pierce the protection mechanism 1. At the same time, it is simple to operate. During the sliding process of the infusion needle mechanism 2 in the groove 8, the resistance is reduced, and there is no need to apply a large pushing force, which is easy to operate. At the same time, the locking end 7 of the embodiment of the present invention cooperates with the needle handle 4 to lock the infusion needle mechanism 2 in the protection mechanism 1. The locking structure is stable and can prevent it from falling off.

[0039] like Figure 3-Figure 4 As shown, in order to improve the locking stability between the needle handle 4 and the protective mechanism 1, a limiting latch 9 is provided on one side of the notch 8 of the locking end 7. A positioning gap 10 exists between the limiting latch 9 and the other side of the notch 8. A limiting platform 11 is provided on the end surface of the locking end 7. The needle handle 4 can enter the locking end 7 through the positioning gap 10 and contact the limiting platform 11. The limiting latch 9 and the limiting platform 11 can lock the needle handle 4. Specifically, there is a certain gap between the limiting latch 9 and the other side of the notch 8 of the slide frame 5. This gap is called the positioning gap 10. When the needle handle 4 moves to the locking end 7, it can enter the locking end 7 through this gap. A platform called the limiting platform 11 is provided on the end surface of the locking end 7. When the needle handle 4 enters the locking end 7 through the positioning gap 10, it will contact the limiting platform 11, that is, after the needle handle 4 enters the locking end 7 through the positioning gap 10, it will be limited to between the limiting tooth 9 and the limiting platform 11, thereby realizing the locking state of the needle handle 4.

[0040] For example, the side of the limiting latch 9 facing the limiting platform 11 is a horizontal structure, which can limit the needle handle 4 entering the locking end 7 and restrict the needle handle 4 from exiting the locking gap 10. The other side of the limiting latch 9 facing the slot 8 where it is located is an arc-shaped structure, which can guide the needle handle 4 to move along a specific path. The arc-shaped structure includes a guide end 12 and a limit end 13. The guide end 12 is arranged on one side of the entrance end 6 of the slide frame 5, and the limit end 13 is arranged on one side of the locking end 7 of the slide frame 5. The distance between the limiting latch 9 and the other side of the slot 8 where it is located gradually decreases from the guide end 12 to the limit end 13. The guide end 12 can guide the needle handle 4 into the locking gap 10 and start to move along the arc-shaped structure. The limit end 13 is used to provide the final locking position when the needle handle 4 moves to this end. From the guide end 12 to the limit end 13, the distance between the limiting latch 9 and the other side of the slot 8 where it is located gradually decreases. This design ensures that the needle handle 4 is gradually guided and eventually locked during movement. As the needle handle 4 moves, the gradually decreasing distance of the arc structure helps the needle handle 4 to be more accurately positioned at the locking end 7 and contact the limit platform 11 to achieve stable locking.

[0041] Furthermore, a plurality of first guide mechanisms 14 are provided on one side of the entrance end 6 of the slide frame 5. Each first guide mechanism 14 is provided on one side of the slot 8 and extends along the other side of the slot 8 to form a guide path. During the sliding of the infusion needle mechanism 2 in the protection mechanism 1, the needle handle 4 will slide in the gap between the first guide mechanism 14 and the other side of the slot 8, that is, the first guide gap 15. When the needle handle 4 is locked at the locking end 7, the needle tip 20 of the infusion needle mechanism 2 is hidden between the slide frame 5 and the first guide mechanism 14, which helps to protect the user from being hurt by the needle tip 20 and also prevents the needle tip 20 from being accidentally exposed. There is a first guide gap 15 between each first guide mechanism 14 and the other side of the slot 8 where it is located. The needle handle 4 can pass through the first guide gap 15 and slide along the slot 8. This gap allows the needle handle 4 to pass through and slide along the slot 8, providing a channel for the needle handle 4 to enter and exit the slide frame 5. Preferably, two first guide mechanisms 14 are provided, and the two first guide mechanisms 14 are both provided on the same side of the notch 8. The free end of each first guide mechanism 14 is arc-shaped, so that the needle handle 4 is more stable when entering the groove frame. The free end of each first guide mechanism 14 is arc-shaped. This structure can provide a smooth transition, making it easier for the needle handle 4 to slide along the guide mechanism. At the same time, the arc-shaped end helps to guide the needle handle 4 to align with the locking end 7 more accurately. When the needle handle 4 is locked at the locking end 7, the two first guide mechanisms 14 work together with the slide frame 5 to hide the needle tip 20 of the infusion needle mechanism 2, thereby increasing safety during use.

[0042] It should be noted that the number of the first guiding mechanisms 14 is not limited here, and can be set according to actual conditions, as long as sufficient guiding and shielding effects can be achieved. At the same time, two adjacent first guiding mechanisms 14 can be set on the same side or on opposite sides, and there is no restriction here. When the two first guiding mechanisms 14 are set on opposite sides and on the same horizontal plane, the first guiding gap 15 is between the two first guiding mechanisms 14.

[0043] Furthermore, the chute frame 5 is provided with a second guide mechanism 16. The second guide mechanism 16 and the limiting latch 9 are respectively arranged on either side of the notch 8, and a second guide gap 17 exists between the second guide mechanism 16 and the other side of the notch 8 in which it is located. Specifically, the second guide mechanism 16 is arranged on the chute frame 5, and is respectively located on either side of the notch 8 with the limiting latch 9. This layout helps provide more comprehensive guidance and support for the needle handle 4 during movement. The second guide gap 17 between the second guide mechanism 16 and the other side of the notch 8 in which it is located allows the needle handle 4 to pass through and slide along the other side of the notch 8. Together with the first guide gap 15, it provides a bidirectional guide path for the needle handle 4. The first guide mechanism 14 and the second guide mechanism 16 work in conjunction to ensure that the needle handle 4 moves smoothly and accurately within the chute frame 5. This structure helps reduce friction and vibration of the needle handle 4 during movement, improving operational stability and precision. Preferably, the axial centerline of the first guide slit 15 overlaps with the axial centerline of the second guide slit 17, and the axial centerline of the first guide slit 15 is parallel to the axial centerline of the chute frame 5. This alignment structure can ensure that the needle handle 4 slides along a common centerline during movement, thereby improving the accuracy and stability of the operation. The first guide slit 15 is arranged in a straight line along the length of the chute frame 5, which helps the needle handle 4 move along a straight path within the chute frame 5. Because the centerlines of the first guide slit 15 and the second guide slit 17 overlap and are both parallel to the centerline of the chute frame 5, they help provide a uniform guiding force, reduce the deviation of the needle handle 4 during movement, ensure the accuracy of the needle handle 4 when moving within the chute frame 5, and reduce errors that may be caused by misaligned guide slits or deviation from the centerline.

[0044] More preferably, the transverse width of the limiting end 13 of the locking slit 10 is smaller than the width of the needle handle 4. In this way, when the needle handle 4 wants to pass through the locking slit 10 and enter the locking end 7, the limiting latch 9 will deform slightly, allowing the needle handle 4 to pass through the locking slit 10 smoothly. When the needle handle 4 passes through the locking slit 10 and enters the locking end 7, the limiting latch 9 will return to its original shape. Since the end surface of the limiting latch 9 at the locking end 7 is transverse, it can limit the needle handle 4 from moving back, thereby achieving a stable locked state.

[0045] To enhance the guiding and limiting effects of the second guide mechanism 16, the free end of the second guide mechanism 16 is configured to be curved. The curved free end provides a smooth transition, allowing the needle handle 4 to smoothly change direction when moving into the second guide mechanism 16, reducing friction and damage to the needle handle 4. Compared to sharp or right-angled edges, the curved free end can reduce the resistance encountered by the needle handle 4 during movement, making operation easier. Preferably, when the needle handle 4 moves until one side contacts the limiting latch 9 and the other side contacts the side wall of the notch 8, the infusion needle mechanism 2 is in contact with the free end of the second guide mechanism 16, and at this time, the axial centerline of the needle handle 4 is parallel to or coincides with the axial centerline of the retaining gap 10. Specifically, in the process of the needle handle 4 entering the locking gap 10, the liquid needle mechanism fits with the free end of the second guide mechanism 16, that is, at this time, there are two positioning points on the side of the entire infusion needle mechanism 2, namely, the fitting point between it and the second guide mechanism 16 and the fitting point between it and the limiting tooth 9. The two positioning points can limit the entire infusion needle mechanism 2 to a fixed straight line, which is parallel to or coincides with the axial center line of the locking gap 10, that is, this structure can ensure that the needle handle 4 enters the locking gap 10 in parallel, avoiding the needle handle 4 from being stuck in the locking gap 10 before entering the locking end 7, and avoiding the risk of damage to the limiting tooth 9. Of course, the space of the needle handle 4 in the locking end 7 can be increased to increase the locking stability of the needle handle 4 and the locking end 7. For example, the locking end 7 is set to a heightened side shelf 18 structure. It should be noted that the higher the fit between the needle handle 4 and the inner wall of the locking end 7, the higher the locking stability of the protective cover. If the protective cover provided in the embodiment of the utility model is provided with a heightened side shelf 18, the needle handle 4 is easily stuck when it just enters the side shelf 18 without the guidance of the second guide mechanism 16. Therefore, the second guide mechanism 16 can improve the smoothness of the needle handle 4 entering the locking end 7.

[0046] It should be noted that when the protection mechanism 1 is not in use, it can be placed close to the pintle 19 or the bottle stopper puncture needle. This structure can be applied to Figure 1 The IV needle shown is also suitable for Figure 2 The venous blood collection needle shown is of course also applicable to other types of needle tube mechanisms, and is not limited here. In general, the protective cover provided by the embodiment of the present invention is through the anti-stab-type venous protection device (protection mechanism 1) on the hose 3 at the rear of the original venous puncture needle. After the venous puncture needle is used, it is moved from bottom to top in a push-pull manner to wrap the used venous puncture needle needle. The front end of the anti-stab device (protection mechanism 1) adopts an oblique cut shape to prevent injury, ensuring that the needle handle 4 can easily slide into the side opening of the anti-stab device slide frame 5 no matter from which angle it contacts the device, until the rear locking gap 10 passes through the needle handle 4, and together with the side shelf seal 18, the puncture needle is completely locked, ensuring that the needle tip 20 is in the slide frame 5 to avoid secondary punctures.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention. It should be noted that the structures and components illustrated in the accompanying drawings are not necessarily drawn to scale, and that descriptions of known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the present invention.

Claims

1. A puncture-proof venipuncture needle protective cover, comprising a protective mechanism (1) and an infusion needle mechanism (2), characterized in that: The protection mechanism (1) is used to be mounted on a hose (3) connected to the infusion needle mechanism (2); the protection mechanism (1) can slide on the hose (3); and the infusion needle mechanism (2) is provided with a needle handle (4); The protection mechanism (1) comprises a slide frame (5), the slide frame (5) comprises an inlet end (6) and a locking end (7), the slide frame (5) is provided with a notch (8) along the axial direction, the infusion needle mechanism (2) can enter the slide frame (5) from the inlet end (6), and drive the needle handle (4) to slide along the notch (8), the needle handle (4) protrudes from the notch (8), and when the needle handle (4) enters the locking end (7), the infusion needle mechanism (2) can be locked in the slide frame (5).

2. The puncture-proof venipuncture needle protective cover according to claim 1, characterized in that: A limiting latch (9) is provided on one side of the notch (8) of the locking end (7), and a locking gap (10) exists between the limiting latch (9) and the other side of the notch (8). A limiting platform (11) is provided on the end surface of the locking end (7), and the needle handle (4) can enter the locking end (7) through the locking gap (10) and contact the limiting platform (11), and the limiting latch (9) and the limiting platform (11) can lock the needle handle (4).

3. The puncture-proof venipuncture needle protective cover according to claim 2, characterized in that: The side of the limiting tooth (9) facing the limiting platform (11) is a horizontal structure, and the other side of the limiting tooth (9) facing the slot (8) where it is located is an arc structure, and the arc structure includes a guide end (12) and a limiting end (13), the guide end (12) is arranged on one side of the entrance end (6) of the slide frame (5), and the limiting end (13) is arranged on one side of the locking end (7) of the slide frame (5), and the distance between the limiting tooth (9) and the other side of the slot (8) where it is located gradually decreases from the guide end (12) to the limiting end (13).

4. The puncture-proof venipuncture needle protective cover according to claim 3, characterized in that: A plurality of first guide mechanisms (14) are provided on one side of the inlet end (6) of the chute frame (5), each of the first guide mechanisms (14) being provided on one side of the notch (8) and extending along the other side of the notch (8); when the needle handle (4) is locked at the locking end (7), the needle tip of the infusion needle mechanism (2) is hidden between the chute frame (5) and the first guide mechanism (14); A first guide gap (15) exists between each first guide mechanism (14) and the other side of the slot (8) where it is located, and the needle handle (4) can pass through the first guide gap (15) and slide along the slot (8).

5. The puncture-proof venipuncture needle protective cover according to claim 4, characterized in that: Two first guide mechanisms (14) are provided, and the two first guide mechanisms (14) are both provided on the same side of the slot (8), and the free end of each first guide mechanism (14) is arc-shaped.

6. The puncture-proof venipuncture needle protective cover according to claim 4, characterized in that: A second guiding mechanism (16) is also provided on the slide frame (5). The second guiding mechanism (16) and the limiting latch (9) are respectively provided on both sides of the slot (8). A second guiding gap (17) exists between the second guiding mechanism (16) and the other side of the slot (8) where it is located.

7. The puncture-proof venipuncture needle protective cover according to claim 6, characterized in that: The axial center line of the first guide slot (15) overlaps with the axial center line of the second guide slot (17), and the axial center line of the first guide slot (15) is parallel to the axial center line of the slide slot frame (5).

8. The puncture-proof venipuncture needle protective cover according to claim 7, characterized in that: The transverse width of the limiting end (13) of the positioning gap (10) is smaller than the width of the needle handle (4).

9. The puncture-proof venipuncture needle protective cover according to claim 8, characterized in that: When the needle handle (4) moves to the point where one side thereof contacts the limiting latch (9) and the other side thereof contacts the side wall of the notch (8), the infusion needle mechanism (2) fits in contact with the free end of the second guide mechanism (16), and at this point, the axial centerline of the needle handle (4) is parallel to or coincides with the axial centerline of the latching gap (10).

10. The puncture-proof venipuncture needle protective cover according to claim 6, characterized in that: The free end of the second guiding mechanism (16) is arc-shaped.

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