Syringe needle protection device and syringe

Abstract

The invention relates to the field of medical instruments, in particular to a syringe needle protection device and a syringe. The protection device comprises an end plate, an upper half sealing cover, a lower half sealing cover and a lock catch assembly. The end plate is provided with a preformed hole used for being connected with an injector nipple. And the other ends of the upper half sealing cover and the lower half sealing cover are rotationally connected to the two ends of the end plate through pin shafts and curved bars. The lock catch assembly comprises a lock block and a lock catch which are arranged on the upper half sealing cover plate and the lower half sealing cover plate and used for achieving closing and locking. The device further comprises a semicircular clamp which is used for fixing the semi-sealing cover in an open state. The device is simple in structure, convenient to operate and capable of effectively preventing the needle head from being polluted and preventing medical staff from being injured by sharp instruments.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a syringe needle protection device and a syringe. Background Art

[0002] Syringes are frequently used equipment in the medical field and are usually used in conjunction with injection needles. Before use, their expiration date and the tightness of the packaging must be checked. When using, you need to unpack the package, take out the syringe, and connect the needle plug of the injection needle to the nipple of the syringe. After use, the nipple of the syringe should be separated from the needle plug. In the process of drug preparation, nurses need to use syringes to absorb liquid medicine. After the liquid medicine is absorbed, the exposed needle may become the source of accidental stabs. In view of the high intensity of clinical work, in order to improve efficiency during the operation, nurses sometimes do not put back the needle cap after absorbing the liquid medicine, which easily leads to contamination of the syringe needle; or use gloves to put back the needle cap. Under the fast working rhythm, when putting back the needle cap with gloves, the syringe needle may cause sharp injury. According to statistics, the proportion of medical staff suffering from sharp injuries due to the use of injection needles is as high as 19.56%. Sharp injuries of syringe needles may cause infection with blood-borne pathogens (such as hepatitis B virus, hepatitis C virus, human immunodeficiency virus), which brings great pressure to the physical and mental health of medical staff. Therefore, how to develop a syringe needle protection device and a syringe is particularly important. Summary of the invention

[0003] The purpose of the present application is to provide a syringe needle protection device to solve the problems in the prior art such as easy contamination of the needle and easy occurrence of sharp injuries to medical staff.

[0004] To achieve the above objectives, this application provides the following technical solutions: A syringe needle protection device comprises: an end plate, an upper half cover, a lower half cover and a locking assembly; The end plate is provided with a reserved hole, which is used to connect with the nipple of the syringe; One end of the upper half cover and the lower half cover are provided with a cover plate; the other ends of the upper half cover and the lower half cover are respectively rotatably arranged at the two ends of the end plate to form an openable and closable structure; The lock assembly includes a lock block and a lock buckle; one of the lock block and the lock buckle is arranged on the cover plate of the upper cover, and the other is arranged on the cover plate of the lower cover; When the upper cover and the lower cover are both in the open state, the locking block is separated from the locking buckle; when the upper cover and the lower cover are both in the closed state, the locking block can be locked with the locking buckle.

[0005] Furthermore, both the upper half cover and the lower half cover are rotatably connected to the end plate through a pin and a bent rod; the end plate is provided with a rotatable pin, and one end of the upper half cover and the lower half cover without a cover plate is connected to one end of the bent rod; the other end of the bent rod is connected to the pin to convert the rotational motion of the pin into the opening and closing motion of the half cover.

[0006] Furthermore, the end plate is provided with a pin hole, a rotatable pin is inserted into the pin hole, and both ends of the pin are arranged through the pin hole of the end plate; the other end of the crank is provided with a groove structure for connection, and the two side walls of the groove structure have shaft holes matching with the ends of the pin, and the shaft holes are sleeved and installed on the pin; Alternatively, the end plate is provided with a pin hole, a rotatable pin is inserted into the pin hole, the end plate where the middle section of the pin is located is provided with a mounting groove, the mounting groove can expose the rotatable pin; the other end of the curved rod is sleeved and connected to the pin in the mounting groove.

[0007] Furthermore, the curved rod includes rod segment 1 and rod segment 2; rod segment 1 and rod segment 2 are connected at an angle to form an avoidance angle space for fitting the wall of the syringe barrel; one of rod segment 1 and rod segment 2 is connected to the pin shaft, and the other is connected to the half cover.

[0008] Furthermore, the upper cover and the lower cover are both semi-cylindrical.

[0009] Furthermore, the size of the reserved hole can be set according to syringes of different specifications and models.

[0010] Furthermore, the end plate is in the shape of a plate; if the bottom end of the syringe barrel is an external convex surface structure, the rear surface of the end plate is a concave abutting curved surface matching the external convex surface structure.

[0011] Furthermore, the syringe needle protection device of the present application also includes a semicircular clamp; the upper half cover and the lower half cover are respectively provided with a semicircular clamp; The semicircular clamp has a curved surface that fits the semi-cylindrical half cover; The two semicircular clamps are respectively connected to two opposite sides of the outer wall of the syringe barrel; Both side walls of the upper half cover and the lower half cover are correspondingly provided with slots for clamping with the semicircular clamp; after the upper half cover and the lower half cover are flipped open, they can be detachably fixed to the semicircular clamp.

[0012] Furthermore, the syringe needle protection device of the present application also includes a return torsion spring member sleeved on the pin shaft; the return torsion spring member is used to apply a rotational force to the pin shaft, and the rotational force is a rotational force that facilitates the closing of the upper half cover and the lower half cover.

[0013] Furthermore, the lock buckle is slidably arranged on the cover plate of the upper half cover; the cover plate is provided with a slide groove, a slide rod slidably arranged in the slide groove, and the lock block is connected to one end of the slide rod.

[0014] The present application also provides a syringe, comprising the above-mentioned syringe needle protection device, and further comprising: a syringe barrel, a syringe needle, a piston, a piston handle and a nipple; the syringe nipple is inserted into the reserved hole, and the end plate is fitted with the bottom end surface of the syringe barrel; The syringe needle includes: a needle stem and a needle plug, one end of the needle stem is connected to the needle plug, and the other end is provided with a needle tip structure; the syringe needle is connected to the nipple through the needle plug sleeve; The semicircular clamp is fixedly arranged on the outer wall of the syringe barrel; or, an adhesive sticker is arranged on the outer wall surface of the semicircular clamp, and the semicircular clamp is adhered to the outer wall of the syringe barrel by means of the adhesive sticker.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The syringe needle protection device of the present application includes an end plate, an upper half cover, a lower half cover and a locking assembly; a reserved hole is arranged on the end plate, and the reserved hole is connected to the nipple of the syringe. The reserved hole design on the end plate enables the device to be directly connected to the syringe to achieve quick installation. At the same time, the size of the reserved hole is designed according to the size of the syringe nipple, and the adaptability is good; one end of the upper half cover and the lower half cover both have a cover plate, and the other ends of the upper half cover and the lower half cover are respectively rotated and arranged at the two ends of the end plate to form an openable and closable structure; the semi-cylindrical upper and lower half cover structures can completely cover the needle in the closed state, provide all-round protection, and effectively prevent needle contamination; in the open state, it does not affect normal operation, which improves the convenience of use. The locking assembly includes a locking block and a locking buckle, one of the locking block and the locking buckle is arranged on the cover plate of the upper half cover, and the other is arranged on the cover plate of the lower half cover; the locking buckle structure is simple and reliable in design, ensuring that the device will not be accidentally opened in the closed state, thereby enhancing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic structural diagram of a syringe needle protection device in a closed state in the present application; Figure 2 This is a structural schematic diagram of a syringe needle protection device in the open state of the present application; Figure 3 for Figure 1A schematic diagram of the structure of the protective device installed on the syringe in the open state; Figure 4 for Figure 1 A schematic diagram of the structure of the protective device installed on the syringe in a closed state; Figure 5 for Figure 1 A cross-sectional view of the protective device installed on the syringe in the open state; Figure 6 for Figure 1 A cross-sectional view of the closed state of the protective device installed on the syringe; Figure 7 for Figure 4 A partial enlarged perspective view of the upper cover and the syringe in the protective device; Figure 8 for Figure 6 A partial enlarged perspective view of the lock assembly in the protection device; Fig. 9 A schematic diagram of the structure of a return torsion spring in the protection device of the present application; Fig.10 for Figure 1 A schematic diagram of the structure of a return torsion spring applied in a protective device; Fig.11 for Fig.10 A partial enlarged schematic diagram of the installation perspective of the center return torsion spring; Among them, 1. Empty barrel (syringe barrel); 2. Piston shaft; 3. Nipple; 4. Needle plug; 5. Needle stem; 6. Piston; 10. Needle protection device; 11. Lower half cover; 12. Upper half cover; 13. End plate; 14. Reserved hole; 15. Pin shaft; 16. Curved rod; 17. Semicircular clamp; 18. Slot; 19. Sliding rod; 20. Lock; 21. Lock block, 22. Return spring, 23. Limit buckle. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0022] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0023] The embodiments of the present application are written in a progressive manner.

[0024] See also Figures 1 to 11 , the present invention provides a syringe needle protection device, comprising: an end plate, an upper half cover, a lower half cover and a locking assembly; The end plate is provided with a reserved hole, which is used to connect with the nipple of the syringe; One end of the upper half cover and the lower half cover are provided with a cover plate; the other ends of the upper half cover and the lower half cover are respectively rotatably arranged at the two ends of the end plate to form an openable and closable structure; The lock assembly includes a lock block and a lock buckle; one of the lock block and the lock buckle is arranged on the cover plate of the upper cover, and the other is arranged on the cover plate of the lower cover; When the upper cover and the lower cover are both in the open state, the locking block is separated from the locking buckle; when the upper cover and the lower cover are both in the closed state, the locking block can be locked with the locking buckle.

[0025] In the above scheme, a reserved hole is set on the end plate, and the reserved hole is connected to the nipple of the syringe. The reserved hole design on the end plate enables the device to be directly connected to the syringe to achieve quick installation. At the same time, the size of the reserved hole is designed according to the size of the syringe nipple, and has good adaptability and versatility; one end of the upper half cover and the lower half cover both have a cover plate, and the other ends of the upper half cover and the lower half cover are respectively rotated and set at both ends of the end plate to form an openable and closable structure; the semi-cylindrical upper and lower half cover structures can completely cover the needle in the closed state, provide all-round protection, and effectively prevent needle contamination; in the open state, it does not affect normal operation, which improves the convenience of use. The lock assembly includes a lock block and a lock, one of the lock block and the lock is set on the cover plate of the upper half cover, and the other is set on the cover plate of the lower half cover; the lock structure is simple and reliable in design, ensuring that the device will not be accidentally opened in the closed state, thereby enhancing safety.

[0026] Advantages: Improve safety: The openable and closed design of the upper and lower covers can effectively prevent the needle from being exposed before and after use, prevent the needle from being contaminated or causing needlestick injuries, and ensure the safety of medical staff and patients.

[0027] Easy operation: Through the design of the locking assembly, the closing operation of the upper cover and the lower cover is easy, and medical staff do not need to perform complicated operations when using it, saving time and improving work efficiency.

[0028] Adapt to different syringe models: By designing the reserved holes on the end plate, syringes of different specifications and models can be flexibly adapted, enhancing the versatility and adaptability of the equipment.

[0029] Furthermore, both the upper half cover and the lower half cover are rotatably connected to the end plate through a pin and a crankshaft; the end plate is provided with a rotatable pin, and the end of the upper half cover and the lower half cover without the cover plate is connected to one end of the crankshaft; the other end of the crankshaft is connected to the pinshaft to convert the rotational motion of the pinshaft into the opening and closing motion of the half cover. This rotating connection structure realizes a smooth and reliable opening and closing action, reduces mechanical wear, and prolongs the service life.

[0030] The end plate is provided with a pin hole, a rotatable pin is inserted into the pin hole, and both ends of the pin are arranged through the pin hole of the end plate; the other end of the crank is provided with a groove structure for connection, and the two side walls of the groove structure have shaft holes that match the ends of the pin, and the shaft holes are sleeved and installed on the pin; Alternatively, the end plate is provided with a pin hole, a rotatable pin is inserted into the pin hole, the end plate where the middle section of the pin is located is provided with a mounting groove, the mounting groove can expose the rotatable pin; the other end of the curved rod is sleeved and connected to the pin in the mounting groove.

[0031] Furthermore, the curved rod includes a rod segment 1 and a rod segment 2; the rod segment 1 and the rod segment 2 are connected at an angle to form an avoidance angle space for fitting the syringe barrel wall; one of the rod segment 1 and the rod segment 2 is connected to the pin, and the other is connected to the half cover. The curved rod adopts a two-section design, including a rod segment 1 and a rod segment 2, which are connected at an angle. This design forms an avoidance angle space for fitting the syringe barrel wall, optimizes the spatial layout, reduces the overall volume, and improves the structural stability.

[0032] Furthermore, the upper cover and the lower cover are both semi-cylindrical.

[0033] Furthermore, the size of the reserved hole can be set according to syringes of different specifications and models.

[0034] Furthermore, the end plate is in the form of a plate; if the bottom end of the syringe barrel is an outer convex surface structure, the rear surface of the end plate is a concave abutting curved surface matching the outer convex surface structure. In conjunction with the connection between the reserved hole and the nipple, the protective device can be stably fixed to the syringe barrel to prevent the protective device from loosening or falling off due to unstable connection.

[0035] Furthermore, the syringe needle protection device of the present application also includes a semicircular clamp; the upper half cover and the lower half cover are respectively provided with a semicircular clamp; The semicircular clamp has a curved surface that fits the semi-cylindrical half cover; The two semicircular clamps are respectively connected to two opposite sides of the outer wall of the syringe barrel; The two side walls of the upper half cover and the lower half cover are provided with corresponding slots for engaging with the semicircular clamp; the upper half cover and the lower half cover can be detachably fixed to the semicircular clamp after being flipped open. This design enables the upper and lower half covers to be reliably fixed to the semicircular clamp in the open state, preventing the half covers from shaking and affecting the operation; ensuring the stability of the protective device during use and preventing the device from loosening or falling off.

[0036] Furthermore, the syringe needle protection device of the present application also includes a return torsion spring member sleeved on the pin shaft; the return torsion spring member is used to apply a rotational force to the pin shaft, and the rotational force is a rotational force that facilitates the closing of the upper half cover and the lower half cover.

[0037] As a feasible method, one end of the bent rod is connected to the half cover, and the other end of the bent rod is sleeved on the middle part of the pin shaft; a structure of the return torsion spring is as follows Fig. 9 shown; see Figures 9 to 11, the return torsion spring is sleeved on the pin shaft, one of the feelers of the return torsion spring is fastened to the bent rod through a limiter~limiting buckle, and the other feeler of the return torsion spring abuts against or is also fastened to the end plate through a limiter. Another better way is that the return torsion spring member adopts a parallel double torsion spring, one end of the bent rod is connected to the semi-cover, and the other end of the bent rod is a groove structure, and the two side walls of the groove structure have axial holes that match the ends of the pin shaft; the pin shaft directly passes through the pin shaft hole of the end plate, and the bent rod at the end of the groove structure is installed on the two ends of the pin shaft with the help of the axial hole sleeve. The parallel double torsion spring is sleeved on the pin shaft, and a threaded through hole is provided on the pin shaft in the middle space of the parallel double torsion spring, and a limiting bolt is provided at the threaded through hole. The limiting bolt is used to press and fix the parallel double torsion spring to the pin shaft, and the two ends of the parallel double torsion spring abut against the end plate.

[0038] The return torsion spring applies a rotational force to the pin, and the rotational force is a rotational force that facilitates the closing of the upper cover and the lower cover. The rotational force automatically applied by the return torsion spring helps the upper cover and the lower cover to close automatically after use, which reduces the burden on the operator, improves the convenience of use of the device, and reduces the risk of human error. It is understandable that the rotational force generated by the return torsion spring is less than the fixing force of the semicircular clamp to fix the semicircular cover.

[0039] Furthermore, the lock buckle is slidably arranged on the cover plate of the upper half cover; the cover plate is provided with a slide groove, a slide rod slidably arranged in the slide groove, and the lock block is connected to one end of the slide rod.

[0040] The sliding setting of the lock block makes the operation simpler and more intuitive. The cover plate is provided with a slide groove, in which a slide rod is provided for sliding, and the lock block is connected to one end of the slide rod. The lock block is pushed to the lock buckle by the slide rod to lock. This structure realizes reliable locking, prevents accidental opening, and is easy to operate. The combination of the slide rod and the slide groove simplifies the operation. The user can use the slide rod to push the lock block to move, and it is more convenient to lock or unlock the lock, which improves the user experience.

[0041] The present application also provides a syringe, including the above-mentioned syringe needle protection device, and also includes: a syringe barrel, a piston, a piston handle and a nipple; the syringe nipple is inserted into the reserved hole, and the end plate is fitted with the bottom end surface of the syringe barrel; this facilitates the protection device to form a stable connection with the syringe.

[0042] Furthermore, the semicircular clamp is fixedly arranged on the outer wall of the syringe barrel.

[0043] Furthermore, an adhesive sticker is provided on the outer wall surface of the semicircular clamp, and the semicircular clamp is bonded to the outer wall of the syringe barrel by means of the adhesive sticker.

[0044] Furthermore, the syringe of the present application also includes a syringe needle, which includes: a needle stem and a needle plug, one end of the needle stem is connected to the needle plug, and the other end is provided with a needle tip structure; the needle plug is connected to the nipple.

[0045] The syringe structure of the present application includes: an empty barrel (syringe barrel) 1; a piston shaft 2; a nipple 3; a needle plug 4; a needle stem 5; a piston 6; a needle protection device 10; a lower half cover 11; an upper half cover 12; an end plate 13; a reserved hole 14; a pin 15; a curved rod 16; a semicircular clamp 17; a slot 18; a sliding rod 19; a lock buckle 20; a lock block 21; a return spring 22; and a limit buckle 23.

[0046] The syringe needle is composed of a needle plug 4 and a needle stem 5; the syringe barrel is mainly composed of an empty barrel 1, a piston shaft 2, a piston 6, and a nipple 3; The structure of the syringe needle protection device mainly includes an end plate 13; a reserved hole 14; a pin 15; a bent rod 16; a semicircular clamp 17; a clamping groove 18; a lower half cover 11; an upper half cover 12; a sliding rod 19; and a lock 20.

[0047] The slide bar 19 can slide downward along the slide groove to drive the lock block to connect the lock buckle 20, so that the upper half cover 12 and the lower half cover 11 will form a closed loop, and the syringe needle protection device is in a closed state, which can effectively protect the needle from being contaminated and sharp injuries. Figure 1 When the slide bar 19 drives the lock block to slide upward and disconnects the lock buckle 20, the pin 15 is driven by the curved rod 16 to rotate, so that the upper half cover 12 and the lower half cover 11 are opened, and the syringe needle protection device is in the open state, and the syringe can be used to aspirate the liquid medicine, inject, and perform a series of operations, such as Figure 2 shown.

[0048] After unpacking the syringe package, we take out the syringe barrel, first connect the reserved hole 14 to the nipple 3, and fit the end plate 13 with the bottom of the empty barrel 1 to complete the connection between the syringe barrel and the syringe needle protection device. Then the slide bar 19 slides upward to disconnect the connection with the lock buckle 20, and the pin 15 drives the curved rod 16, so that the upper half cover 12 and the lower half cover 11 are opened, and attached to the empty barrel 1 by means of the semicircular clamp 17. The semicircular clamp 17 has a curved surface that fits with the semi-cylindrical half cover, and double-sided tape can be pasted on the semicircular clamp 17 to make the semicircular clamp 17 fit tightly on the empty barrel 1. Then connect the syringe needle plug 4 to the nipple 3 to form the installation of the syringe needle protection device, as shown in the figure. Figure 3 and Figure 5As shown. The semicircular clamp 17 and the slot 18 on the half cover form a syringe needle protection device and fix the empty syringe barrel, wherein the slot of the half cover and the semicircular clamp 17 are designed to be detachable. When the drug solution is sucked out, in order to prevent needle contamination and sharp injuries, the pin 15 and the curved rod 16 are designed to rotate, the upper half cover 12 and the lower half cover 11 are closed, and the slide bar 19 slides downward to connect with the lock 20, so that the syringe needle protection device is in a closed state, and the semicircular clamp 17 remains on the empty barrel 1 (syringe barrel) to facilitate drug extraction or injection operations. As shown Figure 4 and Figure 6 shown.

[0049] When all operations are completed, the syringe needle protection device is in a closed state, and the end plate 13 can be moved to drive the needle plug 4 to separate the entire syringe needle from the syringe barrel without the need for a sharps box and a needle holder. This is simple, convenient and quick, thereby preventing sharp injuries.

[0050] The syringe protection device of the present application is easy to operate and install, and can be set according to different types of syringes; it can also effectively prevent needle contamination and sharp injuries caused by syringe liquid aspiration, and can be used cyclically. In particular, when separating the syringe and the needle, it can be directly separated by hand without the help of any auxiliary equipment.

[0051] The protective device and syringe of this application have the following advantages: Reasonable structural design, coordinated cooperation of various components, simple and intuitive operation; It can be adapted to syringes of different specifications and models, and is highly practical; Effectively prevent needle contamination and sharp injuries to medical staff; Needle detachment can be achieved without the use of additional tools; Recyclable, economical and environmentally friendly; Significantly improve the operational safety of medical staff.

[0052] The present invention realizes the safety protection function of the syringe needle through the organic combination of the above technical features, solves the problems of sharp injuries and needle contamination in the prior art for medical staff, and has important practical value. It has a simple and reliable structure, convenient operation, strong applicability, and is particularly suitable for promotion and use in medical institutions.

[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A syringe needle protection device, characterized in that: include: End plate, upper cover half, lower cover half and locking assembly; The end plate is provided with a reserved hole, which is used to connect with the nipple of the syringe; One end of the upper half cover and the lower half cover is provided with a cover plate; the other ends of the upper half cover and the lower half cover are respectively rotatably arranged at the two ends of the end plate to form an openable and closable structure; The lock assembly includes a lock block and a lock buckle; one of the lock block and the lock buckle is arranged on the cover plate of the upper cover, and the other is arranged on the cover plate of the lower cover; When the upper cover and the lower cover are both in the open state, the locking block is separated from the locking buckle; when the upper cover and the lower cover are both in the closed state, the locking block can be locked with the locking buckle.

2. The syringe needle protection device according to claim 1, characterized in that: Both the upper half cover and the lower half cover are rotatably connected to the end plate through a pin and a bent rod; the end plate is provided with a rotatable pin, and the end of the upper half cover and the lower half cover without a cover plate is connected to one end of the bent rod; the other end of the bent rod is connected to the pin to convert the rotational motion of the pin into the opening and closing motion of the half cover.

3. The syringe needle protection device according to claim 2, characterized in that: The end plate is provided with a pin hole, a rotatable pin is inserted into the pin hole, and both ends of the pin are arranged through the pin hole of the end plate; the other end of the crank is provided with a groove structure for connection, and the two side walls of the groove structure have shaft holes that match the ends of the pin, and the shaft holes are sleeved and installed on the pin; Alternatively, the end plate is provided with a pin hole, a rotatable pin is inserted into the pin hole, the end plate where the middle section of the pin is located is provided with a mounting groove, the mounting groove can expose the rotatable pin; the other end of the curved rod is sleeved and connected to the pin in the mounting groove.

4. The syringe needle protection device according to claim 3, characterized in that: The curved rod includes rod segment 1 and rod segment 2; rod segment 1 and rod segment 2 are connected at an angle to form an avoidance angle space for fitting the wall of the syringe barrel; one of the rod segment 1 and rod segment 2 is connected to the pin shaft, and the other is connected to the half cover.

5. The syringe needle protection device according to any one of claims 1 to 4, characterized in that: The upper half cover and the lower half cover are both semi-cylindrical; the size of the reserved hole can be set according to syringes of different specifications and models.

6. The syringe needle protection device according to claim 5, characterized in that: The end plate is in the shape of a plate; if the bottom end of the syringe barrel is an external convex surface structure, the rear surface of the end plate is a concave abutting curved surface matching the external convex surface structure.

7. The syringe needle protection device according to claim 5, characterized in that: It also includes a semicircular clamp; the upper half cover and the lower half cover are respectively provided with a semicircular clamp; The semicircular clamp has a curved surface that fits the semi-cylindrical half cover; The two semicircular clamps are respectively connected to two opposite sides of the outer wall of the syringe barrel; Both side walls of the upper half cover and the lower half cover are correspondingly provided with slots for clamping with the semicircular clamp; after the upper half cover and the lower half cover are flipped open, they can be detachably fixed to the semicircular clamp.

8. The syringe needle protection device according to claim 7, characterized in that: It also includes a return torsion spring sleeved on the pin shaft; the return torsion spring is used to apply a rotational force to the pin shaft, and the rotational force is a rotational force that facilitates the upper half cover and the lower half cover to close.

9. The syringe needle protection device according to any one of claims 1-4, 6-8, characterized in that: The lock buckle is slidably arranged on the cover plate of the upper cover; the cover plate is provided with a slide groove, a slide rod is slidably arranged in the slide groove, and the lock block is connected to one end of the slide rod.

10. A syringe, comprising the syringe needle protection device according to any one of claims 1 to 9, characterized in that: Also includes: A syringe barrel, a syringe needle, a piston, a piston handle and a nipple; the nipple of the syringe is inserted into a reserved hole of the end plate, and the end plate is fitted with the bottom end surface of the syringe barrel; The syringe needle includes: a needle stem and a needle plug, one end of the needle stem is connected to the needle plug, and the other end is provided with a needle tip structure; the syringe needle is connected to the nipple through the needle plug sleeve; The semicircular clamp is fixedly arranged on the outer wall of the syringe barrel; or, an adhesive sticker is arranged on the outer wall surface of the semicircular clamp, and the semicircular clamp is adhered to the outer wall of the syringe barrel by means of the adhesive sticker.

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