Leakage-proof injector

Abstract

The utility model provides a leakproof syringe which comprises a syringe needle plastic cap and a syringe cylinder body, a syringe needle is installed on the left side of the upper end of the syringe needle plastic cap in a penetrating mode, a plastic protruding plug is installed on the right side of the upper end of the syringe needle plastic cap in a penetrating mode, and an annular clamping groove is formed in the lower end of the inner side of the syringe needle plastic cap. A first positioning deflector rod and a second positioning deflector rod are horizontally fixed to the lower sides of the left end and the right end of the syringe needle plastic cap correspondingly, a liquid outlet pipe head is integrally arranged at the upper end of the syringe barrel, a liquid outlet hole is formed in the left side of the upper end of the liquid outlet pipe head, and the liquid outlet pipe head is fixedly sleeved with a clamping ring; according to the injector, the piston can be stably fixed, so that the piston cannot move forwards to extrude suspension liquid and cannot move backwards to suck air, the suspension liquid in the injector can be sealed and opened, the piston can be fixed and cannot move in the closed state, and the piston can be fixed and cannot move in the closed state. And liquid leakage and gas leakage are avoided.

Description

Technical Field

[0001] The utility model is a leak-proof syringe, belonging to the technical field of experimental research and development equipment. Background Art

[0002] In the development research of stem cells, a certain amount of stem cell suspension is usually required for experimental research and development. In such research, the stem cell suspension needs to be sucked into a syringe and injected into the body by injection, so as to track, monitor and evaluate the efficacy of stem cells.

[0003] However, the conventional syringes currently used have the following disadvantages: 1. After inhaling the stem cell suspension, the syringe usually needs to be transported, and the piston of the syringe cannot be fixed. The loose piston push rod can easily be accidentally touched, thereby squeezing the high-concentration stem cell suspension out of the syringe, losing a large number of stem cells, resulting in significant errors in the number of stem cells, and causing instability in the experimental data or even failure of the experiment. The stem cell suspension that flows back into the needle will bring the risk of stem cell contamination; 2. During transportation, due to bumps, the piston will loosen, and the forward movement of the piston will cause leakage, and the backward movement of the piston will cause air to be inhaled into the syringe, increasing the risk of suspension contamination. After the inhaled air and the stem cell suspension are mixed, a large number of bubbles are generated. The bursting of the bubbles will seriously damage the cells, and the activity of the stem cells will drop sharply, leading to the failure of subsequent research; 3. If the stem cell suspension needs to be injected for research at different time periods, the suspension in the syringe must be sealed and stored after a certain amount is used, and conventional syringes cannot perform sealing operations. Therefore, there is an urgent need for a leak-proof syringe to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a leak-proof syringe to solve the problems raised in the above-mentioned background technology. The present invention designs a syringe that can stably fix the piston so that the piston cannot move forward to squeeze the suspension and cannot move backward to inhale air. It can also seal and open the suspension inside the syringe. In the closed state, the piston can also be fixed and cannot move, thereby preventing leakage of liquid or air.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a leak-proof syringe, comprising a needle plastic cap, a syringe barrel and a piston rod, a needle is installed through the left side of the upper end of the needle plastic cap, a plastic convex plug is installed through the right side of the upper end of the needle plastic cap, an annular groove is provided at the lower end of the inner side of the needle plastic cap, a first positioning lever and a second positioning lever are horizontally fixed on the lower sides of the left and right ends of the needle plastic cap, a liquid outlet pipe head is integrally provided on the upper end of the syringe barrel, and a liquid outlet hole is provided on the left side of the upper end of the liquid outlet pipe head, a retaining ring is fixed on the outside of the liquid outlet pipe head, a first groove and a second groove are respectively provided on the left and right sides of the upper end of the syringe barrel, a piston is inserted into the inside of the syringe barrel, and the piston rod is installed at the lower end of the piston.

[0006] Furthermore, integral pinching pieces are horizontally fixed to the lower sides of the left and right ends of the syringe barrel.

[0007] Furthermore, a reminder label is provided on the lower side of the front end of the piston rod, and a plastic push piece is fixed to the lower end of the piston rod.

[0008] Furthermore, the needle plastic cap is buckled on the outside of the liquid outlet pipe head, and the lower end of the needle plastic cap is in contact with the syringe barrel.

[0009] Furthermore, the first positioning lever and the second positioning lever are respectively clamped in the first clamping slot and the second clamping slot.

[0010] Furthermore, the snap ring is clamped in the annular clamping groove.

[0011] Beneficial effects of the present invention: The leak-proof syringe of the present invention has the following advantages because the syringe barrel, the needle plastic cap, the first positioning lever, the clamping ring, the plastic convex plug and the second positioning lever are added to the present invention:

[0012] 1. The structure is simple, the production materials are the same as traditional syringes, the production standards are universal, and batch production is possible.

[0013] 2. Easy to use: The syringe is opened and closed by rotating the positioning lever. During R&D, stem cells can be used in a fixed and quantitative manner, while the remaining stem cell suspension is sealed in the syringe to avoid reagent contamination.

[0014] 3. After the stem cell suspension is prepared, the liquid outlet is sealed. During transportation, even if the piston is accidentally touched or the road is bumpy, the piston will not move and cause leakage, air leakage, or contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a leak-proof syringe of the utility model;

[0017] Figure 2 This is a schematic diagram of the position of the liquid outlet of a leak-proof syringe of the utility model;

[0018] Figure 3 This is a schematic diagram of the piston connection of a leak-proof syringe of the utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of a plastic cap for a leak-proof syringe needle of the utility model;

[0020] In the figure: 1-needle, 2-needle plastic cap, 3-first positioning lever, 4-liquid outlet, 5-circlip, 6-first slot, 7-syringe barrel, 8-piston, 9-plastic convex plug, 10-annular slot, 11-second positioning lever, 12-second slot, 13-piston rod, 14-plastic push piece, 15-prompt label, 16-integrated pinch piece. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] See also Figures 1-4 The utility model provides a technical solution: a leak-proof syringe, comprising a needle plastic cap 2, a syringe barrel 7 and a piston rod 13. A needle 1 is installed through the left side of the upper end of the needle plastic cap 2, and a plastic convex plug 9 is installed through the right side of the upper end of the needle plastic cap 2. An annular groove 10 is provided at the lower end of the inner side of the needle plastic cap 2. A first positioning lever 3 and a second positioning lever 11 are horizontally fixed to the lower sides of the left and right ends of the needle plastic cap 2 respectively. A liquid outlet pipe head is integrally provided at the upper end of the syringe barrel 7, and a liquid outlet hole 4 is provided at the left side of the upper end of the liquid outlet pipe head. A retaining ring 5 is fixed on the outside of the liquid outlet pipe head. A first groove 6 and a second groove 12 are respectively provided on the left and right sides of the upper end of the syringe barrel 7. A piston 8 is inserted into the inside of the syringe barrel 7, and the piston rod 13 is installed at the lower end of the piston 8.

[0023] As the first embodiment of the present invention: integrated pinching tabs 16 are horizontally fixed to the lower sides of both the left and right ends of the syringe barrel 7. The added integrated pinching tabs 16 facilitate the experimenter to press against the lower end of the syringe barrel 7. A reminder label 15 is provided on the lower side of the front end of the piston rod 13, and a plastic push tab 14 is fixed to the lower end of the piston rod 13. The added reminder label 15 facilitates the experimenter to obtain information about the use of this device. The needle plastic cap 2 is buckled onto the outside of the liquid outlet pipe head, and the lower end of the needle plastic cap 2 is in contact with the syringe barrel 7. The added needle plastic cap 2 facilitates the communication between the liquid outlet 4 and the needle 1, and the plastic convex plug 9 can also be used to block the liquid outlet 4 during transportation. The first positioning lever 3 and the second positioning lever 11 are respectively clamped in the first clamping groove 6 and the second clamping groove 12, and the clamping ring 5 is clamped in the annular clamping groove 10. By adding the first positioning lever 3 and the second positioning lever 11 and clamping them in the first clamping groove 6 and the second clamping groove 12, respectively, and the clamping ring 5 is clamped in the annular clamping groove 10, it can be ensured that the needle plastic cap 2 is not prone to loosening and falling off when it is sleeved on the upper end of the syringe barrel 7.

[0024] As a second embodiment of the present utility model: when actually using, the device is taken out of the package, the needle plastic cap 2 is buckled on the upper end of the syringe barrel 7, so that the needle plastic cap 2 is buckled on the outside of the liquid outlet pipe head, and then the needle plastic cap 2 is pressed, so that the first positioning lever 3 and the second positioning lever 11 are respectively clamped in the first clamping groove 6 and the second clamping groove 12, and the clamping ring 5 is clamped in the annular clamping groove 10, and the needle plastic cap 2 can be firmly installed. At this time, the liquid outlet hole 4 is tightly squeezed on the lower end of the needle 1 to form a passage, and then the piston rod 13 and the piston 8 are operated to suck After the stem cell suspension is injected, the air in the syringe barrel 7 is expelled. Then, the needle plastic cap 2 is slightly lifted to remove the first positioning lever 3 and the second positioning lever 11 from the first and second slots 6 and 12, respectively. The needle plastic cap 2 is then rotated 180 degrees to engage the first positioning lever 3 with the second slot 12 and the second positioning lever 11 with the first slot 6. The plastic plug 9 is then positioned opposite the liquid outlet 4 and seals it, creating a sealed environment within the syringe barrel 7. At this point, the piston 8 cannot move up and down under external force, thus achieving a leak-proof function.

[0025] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A leak-proof syringe comprising a needle plastic cap (2), a syringe barrel (7) and a piston rod (13), characterized in that: A needle (1) is installed through the left side of the upper end of the needle plastic cap (2), a plastic convex plug (9) is installed through the right side of the upper end of the needle plastic cap (2), an annular clamping groove (10) is provided at the lower end of the inner side of the needle plastic cap (2), and a first positioning lever (3) and a second positioning lever (11) are fixed horizontally to the lower sides of the left and right ends of the needle plastic cap (2), respectively; The upper end of the syringe barrel (7) is integrally provided with a liquid outlet pipe head, and a liquid outlet hole (4) is provided on the left side of the upper end of the liquid outlet pipe head. A clamping ring (5) is fixedly sleeved on the outside of the liquid outlet pipe head. A first clamping groove (6) and a second clamping groove (12) are respectively provided on the left and right sides of the upper end of the syringe barrel (7). A piston (8) is inserted into the inner side of the syringe barrel (7), and the piston rod (13) is installed at the lower end of the piston (8).

2. A leak-proof syringe according to claim 1, characterized in that: An integral pinching piece (16) is horizontally fixed to the lower sides of the left and right ends of the syringe barrel (7).

3. The leak-proof syringe according to claim 1, characterized in that: A reminder label (15) is provided on the lower side of the front end of the piston rod (13), and a plastic push piece (14) is fixed to the lower end of the piston rod (13).

4. The leak-proof syringe according to claim 1, characterized in that: The needle plastic cap (2) is buckled onto the outside of the liquid outlet pipe head, and the lower end of the needle plastic cap (2) is in contact with the syringe barrel (7).

5. The leak-proof syringe according to claim 1, characterized in that: The first positioning lever (3) and the second positioning lever (11) are respectively clamped in the first clamping slot (6) and the second clamping slot (12).

6. The leak-proof syringe according to claim 1, characterized in that: The clamping ring (5) is clamped in the annular clamping groove (10).

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