Multifunctional self-locking safety syringe

Abstract

The utility model discloses a multifunctional self-locking type safety injector which comprises an injection tube body, the top and the bottom of the injection tube body are closed, the bottom of the injection tube body is communicated and connected with an injection needle, a self-locking barrel is arranged above the injection tube body, a butt-joint tube body is connected between the injection tube body and the self-locking barrel in a sleeved mode, and the butt-joint tube body is provided with a plurality of through holes. A movable barrel is slidably connected into the self-locking barrel, the top of the movable barrel penetrates through the self-locking barrel to be connected with a pressing plate, the bottom of the movable barrel is connected with a piston rod through a bolt, a piston block is slidably connected into the injection pipe body, and through holes matched with the piston rod are formed in the bottom of an inner cavity of the self-locking barrel and the top of an inner cavity of the injection pipe body. According to the technical scheme, through mutual cooperation of the arc-shaped reeds, the rectangular reeds, the self-locking columns, the penetrating holes, the self-locking holes and other components, effective self-locking can be conducted, and therefore the self-locking device is not prone to sliding in the using process, injection and extraction of the self-locking device are not affected, and the using efficiency and the working efficiency of the self-locking device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of syringes, in particular to a multifunctional self-locking safety syringe. Background Art

[0002] A syringe is a common medical device that consists of a syringe with a small hole at the front end and a matching piston core rod. The syringe is used to inject a small amount of liquid or gas into or extract from areas that are inaccessible by other methods. When the core rod is pulled out, the liquid or gas is sucked in from the small hole at the front end of the syringe, and when the core rod is pushed in, the liquid or gas is squeezed out. The process of extracting or injecting gas or liquid with a syringe and a needle is called injection. For example, a safety syringe disclosed in Patent No. 201310448101.0 has a simple structure and is easy to operate, which greatly reduces the risk factor for medical staff.

[0003] However, the above structure cannot be effectively self-locked during use, which makes it easy to slip during use, thereby affecting its injection and extraction, reducing its use efficiency and work efficiency. Therefore, we propose a multifunctional self-locking safety syringe. Summary of the Invention

[0004] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art and to provide a multifunctional self-locking safety syringe that can effectively self-lock, thereby preventing it from sliding during use, thereby not affecting its injection and withdrawal, and improving its use efficiency and work efficiency.

[0005] In order to achieve the above-mentioned purpose, a multifunctional self-locking safety syringe is provided, comprising: an injection tube body, wherein the top and bottom of the injection tube body are both closed, the bottom of the injection tube body is connected to an injection needle, a self-locking cylinder is provided above the injection tube body, and a docking tube body is sleeved between the injection tube body and the self-locking cylinder, a movable cylinder is slidably connected in the self-locking cylinder, and the top of the movable cylinder is connected to a pressing plate through the self-locking cylinder, the bottom of the movable cylinder is connected to a piston rod by a bolt, and a piston block is slidably connected in the injection tube body, the inner cavity bottom of the self-locking cylinder and the inner cavity top of the injection tube body are both provided with through holes matching the piston rod, and the bottom end of the piston rod passes through the self-locking cylinder in sequence The through hole is connected to the top of the piston block, and the piston rod outer sleeve is provided with a buffer spring, and the top and bottom ends of the buffer spring are respectively connected to the bottom of the moving cylinder and the bottom of the inner cavity of the self-locking cylinder, and the rear inner wall of the moving cylinder is connected with a cylinder by bolts, and the outer sleeve of the cylinder is connected with an arc-shaped spring leaf, and the bottom of the arc-shaped spring leaf is connected with a rectangular spring leaf near the left and right sides, and the bottom of the rectangular spring leaf is connected with a docking piece by bolts, and the two sides of the docking pieces are connected with a self-locking column by bolts. A through hole matching the self-locking column is provided on the inner wall of the moving cylinder, and a number of evenly distributed self-locking holes matching the self-locking column are provided on the left and right inner walls of the self-locking cylinder.

[0006] According to the multifunctional self-locking safety syringe, a movable block is slidably connected to the movable cylinder near the top, and a T-shaped screw is provided above the pressing plate. A threaded hole matching the T-shaped screw is provided on the top of the pressing plate, and the bottom end of the T-shaped screw passes through the threaded hole and is movably connected to the top of the movable block through a bearing. The bottom of the movable block is connected to vertical rods near the left and right sides by bolts, and the bottom ends of the vertical rods are connected to right-angled trapezoidal blocks by bolts.

[0007] According to the multifunctional self-locking safety syringe, an inner protective tube is provided outside the injection needle near the top, and the top of the inner protective tube is connected to the bottom of the injection tube body. An outer protective tube is provided outside the inner protective tube, and the bottom of the outer protective tube is closed.

[0008] According to the multifunctional self-locking safety syringe, an internal thread ring is provided on the inner wall of the self-locking cylinder near the top, and an external thread ring matching the internal thread ring is provided on the outer wall of the movable cylinder.

[0009] According to the multifunctional self-locking safety syringe, the inclined surface of the right-angled trapezoidal block matches the inclined surface of the rectangular spring.

[0010] According to the multifunctional self-locking safety syringe, the two self-locking columns are symmetrically arranged with the central axis of the arc-shaped spring as the axis of symmetry.

[0011] According to the multifunctional self-locking safety syringe, an external thread is provided on the outer wall of the inner protective tube, and an internal thread matching the external thread is provided on the inner wall of the outer protective tube.

[0012] The above scheme has at least one of the following beneficial effects: the technical scheme enables effective self-locking through the mutual cooperation between components such as the arc-shaped spring leaf, the rectangular spring leaf, the self-locking column, the perforation and the self-locking hole, so that it is not easy to slide during use, and thus will not affect its injection and extraction, thereby improving its use efficiency and work efficiency.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a main perspective view of the present utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure;

[0017] Figure 3 for Figure 2 A magnified view of point A in the figure;

[0018] Figure 4 for Figure 2 A partial three-dimensional view of the middle rectangular spring and right-angled trapezoidal blocks and other components.

[0019] Legend:

[0020] 1. Injection tube body; 2. Outer protective tube; 3. Docking tube body; 4. Self-locking cylinder; 5. Moving cylinder; 6. Pressing plate; 7. T-shaped screw; 8. Injection needle; 9. Inner protective tube; 10. Piston block; 11. Piston rod; 12. Buffer spring; 13. Self-locking hole; 14. Self-locking column; 15. Right-angled trapezoidal block; 16. Vertical rod; 17. Arc-shaped spring; 18. Movable block; 19. Cylinder; 20. Rectangular spring; 21. Perforation; 22. Docking piece; 23. Internal thread ring; 24. External thread ring. Implementation Method

[0021] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0022] Reference Figures 1 to 4 The embodiment of the present invention is a multifunctional self-locking safety syringe, which includes an injection tube body 1, and the top and bottom of the injection tube body 1 are both closed. The bottom of the injection tube body 1 is connected to an injection needle 8, and an inner protective tube 9 is sleeved outside the injection needle 8 near the top, and the top of the inner protective tube 9 is connected to the bottom of the injection tube body 1. An outer protective tube 2 is arranged outside the inner protective tube 9, and the bottom of the outer protective tube 2 is closed. A self-locking cylinder 4 is provided above the injection tube body 1, and a docking tube body 3 is sleeved between the injection tube body 1 and the self-locking cylinder 4. A movable cylinder 5 is slidably connected in the self-locking cylinder 4, and the top of the movable cylinder 5 is connected to a pressing plate 6 through the self-locking cylinder 4. An inner thread ring 23 is provided on the inner wall of the self-locking cylinder 4 near the top, and an outer thread ring 24 matching the inner thread ring 23 is provided on the outer wall of the movable cylinder 5. The bottom of the movable cylinder 5 is connected to a piston rod 11 by bolts, and a piston is slidably connected in the injection tube body 1. Block 10, the inner bottom of the self-locking cylinder 4 and the inner top of the injection tube body 1 are both provided with through holes matching the piston rod 11, the bottom end of the piston rod 11 passes through the through holes in turn and is connected to the top of the piston block 10, the piston rod 11 is covered with a buffer spring 12, and the top and bottom ends of the buffer spring 12 are respectively connected to the bottom of the moving cylinder 5 and the inner bottom of the self-locking cylinder 4, the rear inner wall of the moving cylinder 5 is connected with a cylinder 19 by bolts, and the cylinder 19 is covered with a buffer spring 12. It is connected to an arc-shaped spring 17, and the bottom of the arc-shaped spring 17 is connected to a rectangular spring 20 near the left and right sides, and the bottom of the rectangular spring 20 is connected to a docking piece 22 by a bolt, and the two docking pieces 22 are connected to a self-locking column 14 on the side away from each other by a bolt, and a through hole 21 matching the self-locking column 14 is opened on the inner wall of the movable cylinder 5, and a number of evenly distributed self-locking holes 13 matching the self-locking column 14 are opened on the inner walls of the left and right sides of the self-locking cylinder 4.

[0023] A movable block 18 is slidably connected near the top of the movable cylinder 5. A T-shaped screw 7 is provided above the pressing plate 6. A threaded hole matching the T-shaped screw 7 is provided at the top of the pressing plate 6. The bottom end of the T-shaped screw 7 passes through the threaded hole and is movably connected to the top of the movable block 18 via a bearing. Vertical rods 16 are bolted to the bottom of the movable block 18 near the left and right sides. The bottom ends of the vertical rods 16 are also bolted to right-angled trapezoidal blocks 15. The inclined surface of the right-angled trapezoidal blocks 15 matches the inclined surface of the rectangular spring 20. This structure allows the two self-locking columns 14 to be moved out of the self-locking holes 13.

[0024] Two self-locking pins 14 are symmetrically arranged about the central axis of the arc-shaped spring 17. The outer wall of the inner protective tube 9 is provided with external threads, while the inner wall of the outer protective tube 2 is provided with internal threads that match the external threads. This structure enables effective self-locking, preventing slippage during use, thereby preventing the injection and withdrawal process from being affected, and improving its efficiency and work efficiency.

[0025] Working principle: When using this technical solution, the arc-shaped spring 17 and the rectangular spring 20 are initially in a compressed state. The outer protective tube 2 is removed, and then the pressing plate 6 is pushed. The pressing plate 6 drives the movable cylinder 5 to move downward in the self-locking cylinder 4 and squeezes the buffer spring 12. The movable cylinder 5 drives the piston block 10 to move downward in the injection tube body 1 through the piston rod 11. When the perforation 21 corresponds to the self-locking hole 13, the elastic action of the arc-shaped spring 17 and the rectangular spring 20 causes the self-locking column 14 to enter the self-locking hole 13, so that it can be effectively Self-locking makes it less likely to slide during use, which will not affect its injection and extraction, thereby improving its use efficiency and work efficiency. By rotating the T-shaped screw 7 clockwise, the T-shaped screw 7 drives the movable block 18 to move downward in the movable cylinder 5, and the movable block 18 drives the right-angled trapezoidal block 15 to move downward through the vertical rod 16. The right-angled trapezoidal block 15 squeezes the arc-shaped spring 17, so that the arc-shaped spring 17 drives the self-locking column 14 to disengage from the self-locking hole 13 through the docking piece 22, which can realize the convenient release of the self-locking state, so that it can be used conveniently and effectively.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A multifunctional self-locking safety syringe, characterized in that: include: The syringe body (1) is provided with a closed top and a closed bottom. The bottom of the syringe body (1) is connected to an injection needle (8). A self-locking cylinder (4) is provided above the syringe body (1). A butt-jointed tube body (3) is sleeved between the syringe body (1) and the self-locking cylinder (4). A movable cylinder (5) is slidably connected inside the self-locking cylinder (4). The top of the movable cylinder (5) passes through the self-locking cylinder (4) and is connected to a pressing plate (6). The bottom of the movable cylinder (5) is connected to a piston rod (11) by a bolt, and a piston block (10) is slidably connected inside the syringe body (1). The bottom of the inner cavity of the self-locking cylinder (4) and the top of the inner cavity of the syringe body (1) are both provided with through holes matching the piston rod (11). The bottom end of the piston rod (11) passes through the through holes in turn and is connected to the top of the piston block (10). The plug rod (11) is provided with a buffer spring (12) on its outer sleeve, and the top and bottom ends of the buffer spring (12) are respectively connected to the bottom of the movable cylinder (5) and the bottom of the inner cavity of the self-locking cylinder (4), the rear inner wall of the movable cylinder (5) is connected with a cylinder (19) by bolts, and the outer sleeve of the cylinder (19) is connected with an arc-shaped spring leaf (17), the bottom of the arc-shaped spring leaf (17) is connected with a rectangular spring leaf (20) near the left and right sides, and the bottom of the rectangular spring leaf (20) is connected with a docking piece (22) by bolts, and the two sides of the docking pieces (22) are connected with the self-locking column (14) by bolts, and a through hole (21) matching the self-locking column (14) is opened on the inner wall of the movable cylinder (5), and a plurality of evenly distributed self-locking holes (13) matching the self-locking column (14) are opened on the left and right inner walls of the self-locking cylinder (4).

2. A multifunctional self-locking safety syringe according to claim 1, characterized in that: A movable block (18) is slidably connected to the top of the movable cylinder (5), and a T-shaped screw (7) is provided above the pressing plate (6). A threaded hole matching the T-shaped screw (7) is provided on the top of the pressing plate (6), and the bottom end of the T-shaped screw (7) passes through the threaded hole and is movably connected to the top of the movable block (18) through a bearing. The bottom of the movable block (18) is connected to vertical rods (16) near the left and right sides by bolts, and the bottom end of the vertical rod (16) is connected to a right-angled trapezoidal block (15) by bolts.

3. A multifunctional self-locking safety syringe according to claim 1, characterized in that: An inner protective tube (9) is provided outside the injection needle (8) near the top, and the top of the inner protective tube (9) is connected to the bottom of the injection tube body (1). An outer protective tube (2) is provided outside the inner protective tube (9), and the bottom of the outer protective tube (2) is closed.

4. A multifunctional self-locking safety syringe according to claim 1, characterized in that: An internal thread ring (23) is provided on the inner wall of the self-locking cylinder (4) near the top, and an external thread ring (24) matching the internal thread ring (23) is provided on the outer wall of the movable cylinder (5).

5. The multifunctional self-locking safety syringe according to claim 2, characterized in that: The inclined surface of the right-angled trapezoidal block (15) matches the inclined surface of the rectangular spring leaf (20).

6. The multifunctional self-locking safety syringe according to claim 1, characterized in that: The two self-locking columns (14) are symmetrically arranged with the central axis of the arc-shaped spring leaf (17) as the symmetry axis.

7. The multifunctional self-locking safety syringe according to claim 3, characterized in that: An external thread is provided on the outer wall of the inner protective tube (9), and an internal thread matching the external thread is provided on the inner wall of the outer protective tube (2).

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