Safety injector

Abstract

The invention provides a safety syringe, and relates to the technical field of syringes, the safety syringe provided by the invention comprises a needle cylinder, a needle head, a shell and a sleeve; the shell sleeves the needle head; the sleeve is arranged on the shell in a sleeving mode and connected with the needle head, and the sleeve is configured to be capable of moving along the shell so as to drive the head of the needle head to stretch out of the shell or retract to the shell. By arranging the shell and the sleeve, the retractable function of the needle head after use is achieved, the puncture risk caused by exposure of the needle head after injection is completed is effectively avoided, and the operation safety is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of syringe technology, and in particular to a safety syringe. Background Technology

[0002] In animal experiments, syringes are the most commonly used instruments by laboratory animal workers. Syringe needles are generally equipped with needle caps, but the needle and cap are small, and when putting the cap back on after each use, any deviation can easily cause a prick, especially in zoonotic disease experiments where the sample taken can harm the health of personnel. A prick can have serious consequences. Furthermore, syringe caps are prone to rolling and loss, and the needle itself poses a potential danger, potentially harming other personnel in the laboratory. Summary of the Invention

[0003] The purpose of this invention is to provide a safe syringe that solves the technical problems of easy loss of the needle cap and easy puncture injury when re-coating the needle in the prior art.

[0004] The present invention provides a safety syringe, comprising: a syringe barrel, a needle, and further comprising: a housing and a sleeve; The outer shell is fitted onto the needle; The sleeve is fitted onto the outer shell and connected to the needle. The sleeve is configured to move along the outer shell to cause the head of the needle to extend out of or retract into the outer shell.

[0005] Furthermore, the safety syringe also includes a connecting tube assembly; One end of the connecting tube assembly is connected to the needle, and the other end of the connecting tube assembly is connected to the head of the syringe.

[0006] Furthermore, the safety syringe also includes a connecting member; One end of the connecting member is connected to the inner side of the sleeve, and the other end of the connecting member passes through the outer shell and extends into the interior of the outer shell to connect with the connecting tube assembly, so that the connecting member moves along with the sleeve, thereby driving the connecting tube assembly and the needle to move.

[0007] Furthermore, the connecting pipe assembly includes a straight pipe and a flexible pipe; One end of the tubing is connected to the head of the syringe, and the other end of the tubing is connected to the straight tube; The end of the straight tube furthest from the flexible tube is connected to the needle.

[0008] Furthermore, the connecting member is connected to the hose.

[0009] Furthermore, the outer shell extends along its length and has an elongated hole, which provides a movement path for the connecting member.

[0010] Furthermore, a first slot is provided at one end of the elongated hole near the injection direction, extending circumferentially along the outer shell. The first slot is used to engage the connecting member.

[0011] Furthermore, a second slot is provided at the end of the elongated hole away from the injection direction, extending circumferentially along the outer shell. The second slot is used to engage the connecting member.

[0012] Furthermore, the outer side of the sleeve is provided with an anti-slip friction part.

[0013] Furthermore, the outer shell has a through hole at the end near the injection direction for the needle to extend out.

[0014] The safety syringe provided by this invention, through the design of a shell and sleeve, enables the needle to retract after use, effectively avoiding the risk of needle exposure and subsequent puncture wounds, and significantly improving operational safety. By placing the sleeve over the shell and connecting it to the needle, the needle can be manually moved along the shell after injection, synchronously retracting into the shell for physical shielding. Compared to traditional syringes, the safety syringe of this invention eliminates the needle cap, preventing needle cap loss and needle exposure during use, thus reducing the risk of accidental puncture wounds and needle cap installation injuries. Therefore, the safety syringe of this invention features convenient operation and superior protective performance. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a safety syringe provided in an embodiment of the present invention; Figure 2 A cross-sectional view of a safety syringe provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the outer shell structure; Figure 4 This is a structural schematic diagram of the outer shell from another perspective; Figure 5 This is a structural schematic diagram of the sleeve and connecting components.

[0017] Icons: 100-syringe; 200-needle; 300-outer shell; 310-elongated hole; 320-first slot; 330-second slot; 340-through hole; 400-sleeve; 410-anti-slip friction part; 500-connecting tube assembly; 510-straight tube; 520-soft tube; 600-connecting component; 700-needle bar. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] like Figure 1 As shown, the safety syringe provided in this embodiment includes: a syringe barrel 100, a needle 200, and also includes: a housing 300 and a sleeve 400; the housing 300 is sleeved on the needle 200; the sleeve 400 is sleeved on the housing 300 and connected to the needle 200, and the sleeve 400 is configured to move along the housing 300 to drive the head of the needle 200 to extend out of the housing 300 or retract into the housing 300.

[0023] The safety syringe provided in this embodiment also includes a needle bar 700, which is inserted into a syringe barrel 100 and can move along the length of the syringe barrel 100. The syringe barrel 100 is used to store the injection liquid, the needle bar 700 is used for pushing, and the needle tip 200 is used for puncture and delivery of the liquid. A housing 300 is fitted over the needle tip 200 to form a protective structure, which can shield and limit the needle tip 200. A sleeve 400 is fitted over the housing 300 and connected to the needle tip 200. The sleeve 400 can slide axially on the housing 300, and its movement drives the needle tip 200 to move synchronously, thereby realizing the operation of the needle tip 200 extending from the front end of the housing 300 or retracting into the housing 300. This structure ensures that the needle tip 200 is completely enclosed by the housing 300 when not in use, avoiding accidental contact that could cause punctures. When in use, the needle tip 200 can be exposed by a simple sliding operation, improving operational safety.

[0024] In alternative implementations, such as Figure 1 and Figure 2 As shown, to further achieve fluid passage connectivity and mechanical linkage, the safety syringe also includes a connecting tube assembly 500. One end of the connecting tube assembly 500 is connected to the needle 200, and the other end is connected to the head of the syringe 100, ensuring that the injected fluid can flow from the syringe 100 through the connecting tube assembly 500 to the needle 200. The connecting tube assembly 500 specifically includes a straight tube 510 and a flexible tube 520. One end of the flexible tube 520 is connected to the outlet of the syringe 100, and the other end is connected to the straight tube 510. The end of the straight tube 510 away from the flexible tube 520 is fixedly connected to the needle 200. The flexible tube 520 has good flexibility, enabling it to maintain the continuity of the fluid passage without being affected by stretching during needle 200 movement.

[0025] In alternative implementations, such as Figure 1 and Figure 2 As shown, to effectively transmit external operating force through the sleeve 400, the syringe is also equipped with a connecting member 600. One end of the connecting member 600 is fixed to the inner side of the sleeve 400, and the other end extends through the outer shell 300 and into its interior, connecting to the connecting tube assembly 500, specifically to the straight tube 510. When the sleeve 400 slides along the outer shell 300, the connecting member 600 moves accordingly, thereby driving the connecting tube assembly 500 and the connected needle 200 to move together, realizing the extension and retraction of the needle 200.

[0026] In an optional embodiment, the connecting member 600 may be in the form of a rigid link.

[0027] More preferably, such as Figure 5As shown, a through hole is provided in the middle of the connecting rod, through which the straight tube 510 passes, so that the connecting rod will not interfere with the fixation of the straight tube 510 and the unobstructed flow of the fluid channel when it moves with the sleeve 400, thus ensuring a stable and reliable liquid passage.

[0028] In alternative implementations, such as Figure 3 and Figure 4 As shown, an elongated hole 310 is provided in the main body of the outer shell 300 along the length direction. The elongated hole 310 provides a guide path for the movement of the connecting member 600, allowing it to slide freely in the length direction of the outer shell 300.

[0029] In alternative implementations, such as Figure 3 and Figure 4 As shown, at the end of the elongated hole 310 near the injection direction, i.e., the front end, a first slot 320 is provided circumferentially along the outer shell 300. When the sleeve 400 drives the connecting member 600 to slide axially to this end position, rotating the sleeve 400 can cause the connecting member 600 to rotate and engage in the first slot 320, thereby achieving positioning and locking of the needle 200 in its fully extended state, ensuring the needle 200 is stable, reliable, and not easily retracted during injection. Correspondingly, at the end of the elongated hole 310 away from the injection direction, i.e., the rear end, a second slot 330 is also provided circumferentially. After the needle 200 has retracted, the connecting member 600 can engage in the second slot 330, achieving the fixation of the needle 200 in its fully retracted state. The first slot 320 and the second slot 330 are located at both ends of the elongated hole 310 and communicate with the elongated hole 310. The overall structure allows the connecting member 600 to slide axially into position first, and then rotate and engage in the slot to complete the locking.

[0030] Preferably, such as Figure 4 As shown, the elongated hole 310, the first slot 320 and the second slot 330 are arranged in pairs and are centrally symmetrically distributed to improve motion stability and force balance.

[0031] In alternative implementations, such as Figure 5 As shown, to facilitate manual operation, the outer surface of the sleeve 400 is provided with an anti-slip friction part 410, such as knurling, embossing, or rubber coating, to increase the friction between the fingers and the sleeve 400 and ensure that the sleeve 400 can be pushed or pulled stably even when wearing gloves.

[0032] In alternative implementations, such as Figure 4 As shown, the outer shell 300 has a through hole 340 at one end near the injection direction. The through hole 340 is sized to match the diameter of the needle 200, allowing the needle 200 to pass through smoothly and also acting as a limit and seal when the needle 200 is retracted to prevent foreign objects from entering.

[0033] The safety syringe provided in this embodiment allows the operator to slide the sleeve 400 forward along the outer shell 300 by pushing it with their finger. The connecting member 600 then slides within the elongated hole 310, causing the needle 200 to gradually extend from the through hole 340. Upon reaching the predetermined position, a slight rotation of the sleeve 400 causes the connecting member 600 to engage with the first retaining groove 320, locking the needle 200 in its extended position. When drawing liquid, the needle rod 700 is pulled, allowing liquid to enter through the needle 200 and flow into the syringe 100 via the connecting tube assembly 500, completing the aspiration process. Injection is then performed. After injection, the sleeve 400 is slid in the opposite direction and rotated, causing the connecting member 600 to move along the elongated hole 310 and engage with the second retaining groove 330 at the rear end. This causes the needle 200 to retract completely into the outer shell 300, achieving a safe seal of the needle 200 and effectively preventing exposure risks.

[0034] The safety syringe provided in this embodiment has the following advantages: 1. Compared with traditional syringes, this embodiment eliminates the design of an independent needle cap, which fundamentally avoids the problem of needle caps being easily lost or difficult to reattach during use, effectively prevents the needle tip from being accidentally exposed, and significantly reduces the risk of needle prick injury to operators when installing or removing needle caps.

[0035] 2. After injection, by sliding and rotating the sleeve 400, the needle 200 can be automatically retracted into the outer shell 300, achieving rapid concealment of the needle 200 and ensuring that the needle 200 remains protected after use. This design significantly reduces the possibility of accidental contact with the needle 200 by laboratory personnel during operation, handling, and transfer. It is particularly suitable for animal experimental scenarios with high biosafety risks such as African swine fever and foot-and-mouth disease, effectively protecting the safety of operators and surrounding personnel, reducing the risk of zoonotic disease transmission, and also helping to maintain the cleanliness and integrity of the needle 200.

[0036] 3. The overall structure is reasonably designed and easy to operate, which improves operating efficiency and safety.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A safety syringe, comprising: The syringe (100) and needle (200) are characterized in that they further include: a shell (300) and a sleeve (400). The outer shell (300) is fitted onto the needle (200); The sleeve (400) is fitted onto the housing (300) and connected to the needle (200). The sleeve (400) is configured to move along the housing (300) to cause the head of the needle (200) to extend out of the housing (300) or retract into the housing (300).

2. The safety syringe according to claim 1, characterized in that, It also includes a connecting pipe assembly (500); One end of the connecting tube assembly (500) is connected to the needle (200), and the other end of the connecting tube assembly (500) is connected to the head of the syringe (100).

3. The safety syringe according to claim 2, characterized in that, It also includes connecting components (600); One end of the connecting member (600) is connected to the inside of the sleeve (400), and the other end of the connecting member (600) passes through the outer shell (300) and extends into the interior of the outer shell (300) to connect with the connecting tube assembly (500), so that the connecting member (600) moves along with the sleeve (400) to drive the connecting tube assembly (500) and the needle (200) to move.

4. The safety syringe according to claim 3, characterized in that, The connecting pipe assembly (500) includes a straight pipe (510) and a flexible pipe (520); One end of the tubing (520) is connected to the head of the syringe (100), and the other end of the tubing (520) is connected to the straight tube (510); The end of the straight tube (510) away from the flexible tube (520) is connected to the needle (200).

5. The safety syringe according to claim 4, characterized in that, The connecting member (600) is connected to the hose (520).

6. The safety syringe according to claim 3, characterized in that, The outer casing (300) extends along its length and has an elongated hole (310) for providing a moving path for the connecting member (600).

7. The safety syringe according to claim 6, characterized in that, The elongated hole (310) is provided with a first slot (320) extending circumferentially along the outer shell (300) at one end near the injection direction. The first slot (320) is used to engage the connecting member (600).

8. The safety syringe according to claim 6, characterized in that, The end of the elongated hole (310) away from the injection direction extends circumferentially along the outer shell (300) and is provided with a second slot (330), which is used to engage the connecting member (600).

9. The safety syringe according to claim 1, characterized in that, The sleeve (400) is provided with an anti-slip friction part (410) on the outer side.

10. The safety syringe according to any one of claims 1-9, characterized in that, The outer casing (300) has a through hole (340) at the end near the injection direction for the needle (200) to extend out.

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