Novel precise filtering injector

Abstract

The utility model discloses a novel precision filtration syringe, which relates to the technical field of syringes, and comprises a needle cylinder, a push rod, a piston, an injection needle base, an injection needle upper seat, a stainless steel needle tube and a protective sleeve, the push rod is slidably connected in the needle cylinder, the bottom end of the push rod is connected with the piston, and the bottom end of the needle cylinder is connected with the injection needle base. According to the novel precise filtering injector, when the push rod moves, the piston can be driven to move, when the change-over switch moves upwards, the second through hole is sealed by the filter base, medicine enters the change-over switch through the stainless steel needle tube, and when the change-over switch moves downwards, the first through hole is sealed by the filter base; the medicine enters the filter membrane through the flow guide hole in the pressure pad, the medicine in the second through hole is injected into the human body through the stainless steel needle tube, and glass fragments and impurities and particles in the medicine can be filtered out through the filter membrane, so that the impurities and particles injected into the human body are reduced, and the risk of harm to the human body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of syringes, in particular to a novel precision filtering syringe. Background Art

[0002] A syringe is a common medical device that can inhale and expel liquid or gas by pushing in or pulling out the push rod and piston. This principle enables the syringe to be used to inject liquid medicine or extract liquid, making it an important auxiliary tool in the medical process. However, existing syringes still have certain defects when used.

[0003] In the existing technology, syringes are an important medical device that can accurately and quickly inject liquid medicines into the patient's body, such as intravenous injections and intramuscular injections. In addition to the injection function, syringes are also often used to draw blood samples, effusions, etc. to provide doctors with a basis for diagnosis. Before inhaling the medicine, traditional syringes need to break the end of the glass bottle of medicine liquid and then use a needle to inhale it. Due to the process of breaking the end of the glass bottle of medicine liquid, there is a risk of glass fragments falling into the glass bottle of medicine liquid. At the same time, there will be impurities and particles of the medicine in the medicine liquid. Once the glass fragments and impurities and particles in the medicine are injected into the human body, it will increase certain safety risks. Utility Model Content

[0004] The purpose of the utility model is to provide a novel precision filtering syringe to solve the problem raised in the above background art that the syringes currently on the market are difficult to filter glass fragments and impurities and particles in medicines.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new precision filtering syringe, comprising: a syringe, a push rod, a piston, an injection needle base, an injection needle upper seat, a stainless steel needle tube and a protective cover, the syringe being slidably connected to the inside of the syringe, the bottom end of the push rod being connected to the piston, the bottom end of the syringe being connected to the injection needle base, the bottom of the injection needle base being connected to the injection needle upper seat, a stainless steel needle tube being installed inside the injection needle upper seat, a protective cover being provided on the outer side of the injection needle upper seat, a filter base being installed inside the injection needle upper seat, a conversion switch being slidably connected to the inside of the filter base, and a first through hole and a second through hole being respectively penetrated inside the conversion switch.

[0006] Preferably, a filter membrane is installed on the inner surface of the filter base, a pressure pad is installed on the inner side of the filter base, and the filter membrane is located on the lower surface of the pressure pad.

[0007] Preferably, a guide hole is provided inside both the pressure pad and the injection needle upper seat.

[0008] Preferably, the first through hole and the second through hole have the same diameter.

[0009] Preferably, a sliding structure is formed between the conversion switch and the injection needle upper seat.

[0010] Preferably, the switching switch is T-shaped.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: when the push rod moves, the piston can be driven to move. When the piston moves, the volume inside the syringe gradually increases, resulting in a decrease in the air pressure inside the syringe. Since the external atmospheric pressure is higher than the pressure inside the syringe, the switch can be moved upward at this time. When the switch moves upward, the second through hole is closed by the filter base, and the drug enters the interior of the switch through the stainless steel needle tube and enters the syringe through the first through hole but not through the filter membrane. When the push rod moves downward, the pressure inside the syringe increases, so that the switch can be moved downward. When the switch moves downward, the first through hole is closed by the filter base, and the drug enters the filter membrane through the guide hole inside the pressure pad. The filter membrane can filter out glass fragments and impurities and particles in the drug. The filtered drug can flow into the second through hole through the guide hole on the filter base. The drug inside the second through hole is then injected into the human body through the stainless steel needle tube. The glass fragments and impurities and particles in the drug can be filtered out by the filter membrane, thereby reducing the impurities and particles injected into the human body and reducing the risk of harm to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main cutaway structure of the present invention;

[0013] Figure 2 This is a schematic diagram of the main cross-sectional structure of the injection needle upper seat of the utility model;

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the filter base of the utility model;

[0015] Figure 4 This is a schematic diagram of the three-dimensional cross-section structure of the filter base of the utility model;

[0016] Figure 5 It is a three-dimensional structural diagram of the transfer switch of the utility model.

[0017] In the figure: 1. syringe; 2. push rod; 3. piston; 4. injection needle base; 5. injection needle upper seat; 6. stainless steel needle tube; 7. protective cover; 8. filter base; 9. conversion switch; 10. first through hole; 11. second through hole; 12. filter membrane; 13. pressure pad; 14. diversion hole. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 5 It can be seen that the utility model provides a technical solution: a new precision filtering syringe, comprising: a syringe 1, a push rod 2, a piston 3, an injection needle base 4, an injection needle upper seat 5, a stainless steel needle tube 6 and a protective sleeve 7, the syringe 1 is internally slidably connected to the push rod 2, the bottom end of the push rod 2 is connected to the piston 3, the bottom end of the syringe 1 is connected to the injection needle base 4, the bottom of the injection needle base 4 is connected to the injection needle upper seat 5, the interior of the injection needle upper seat 5 is installed with a stainless steel needle tube 6, the outer side of the injection needle upper seat 5 is provided with a protective sleeve 7, the filter base 8 is installed inside the injection needle upper seat 5, and the interior of the filter base 8 is slidably connected to the injection needle upper seat 5. A transfer switch 9 is connected, and a first through hole 10 and a second through hole 11 are respectively opened inside the transfer switch 9. A filter membrane 12 is installed on the inner surface of the filter base 8, and a pressure pad 13 is installed on the inner side of the filter base 8. The filter membrane 12 is located on the lower surface of the pressure pad 13. The pressure pad 13 and the interior of the injection needle upper seat 5 jointly have a guide hole 14. The first through hole 10 and the second through hole 11 have the same diameter. A sliding structure is formed between the transfer switch 9 and the injection needle upper seat 5. The shape of the transfer switch 9 is T-shaped. A through hole is opened inside the transfer switch 9 and is connected to the first through hole 10 and the second through hole 11.

[0020] In specific implementation, when the syringe draws the medicine, the end of the glass bottle storing the medicine can be broken first, and then the protective cover 7 can be removed from the outside of the injection needle seat 5, and the end of the stainless steel needle tube 6 on the injection needle seat 5 can be inserted into the glass bottle. At this time, the push rod 2 can be pulled upward. When the push rod 2 moves, it can drive the piston 3 to move. When the piston 3 moves, the volume inside the syringe 1 gradually increases, causing the air pressure inside the syringe 1 to decrease. Since the external atmospheric pressure is higher than the pressure inside the syringe 1, the conversion switch 9 can be moved upward at this time. When the conversion switch 9 is moved upward, the second through hole 11 is closed by the filter base 8, and the medicine enters the interior of the conversion switch 9 through the stainless steel needle tube 6 and passes through the first A through hole 10, but does not pass through the filter membrane 12 to enter the syringe 1, at this time the drug absorption operation is completed, when injecting the drug, the push rod 2 can be pushed downward, when the push rod 2 moves, the pressure inside the syringe 1 increases, so that the switch 9 can be moved downward, when the switch 9 is moved downward, the first through hole 10 is closed by the filter base 8, and the drug passes through the guide hole 14 inside the pressure pad 13 and enters the filter membrane 12, the filter membrane 12 can filter the glass fragments and impurities and particles in the drug, the filtered drug can flow to the second through hole 11 through the guide hole 14 on the filter base 8, and the drug inside the second through hole 11 is injected into the human body through the stainless steel needle tube 6.

[0021] See Figure 1-Figure 5 It can be seen that the filter membrane 12 can filter out glass fragments and impurities and particles in the medicine, thereby reducing the impurities and particles injected into the human body and reducing the risk of harm to the human body.

[0022] To sum up, when using this new precision filtering syringe, first break the end of the glass bottle storing the medicine, then remove the protective cover 7 from the outside of the injection needle upper seat 5, and insert the end of the stainless steel needle tube 6 on the injection needle upper seat 5 into the glass bottle. The filter membrane 12 can filter the glass fragments and impurities and particles in the medicine. The filtered medicine can flow into the second through hole 11 through the guide hole 14 on the filter base 8. The medicine inside the second through hole 11 is then injected into the human body through the stainless steel needle tube 6. The glass fragments and impurities and particles in the medicine can be filtered out by the filter membrane 12, thereby reducing the impurities and particles injected into the human body and reducing the risk of harm to the human body. The content not described in detail in this description belongs to the existing technology known to professional and technical personnel in this field.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new type of precision filter syringe, comprising: The syringe (1), the push rod (2), the piston (3), the injection needle base (4), the injection needle upper seat (5), the stainless steel needle tube (6) and the protective cover (7) are characterized by: The interior of the syringe (1) is slidably connected to a push rod (2), the bottom end of the push rod (2) is connected to a piston (3), the bottom end of the syringe (1) is connected to an injection needle base (4), the bottom of the injection needle base (4) is connected to an injection needle upper seat (5), a stainless steel needle tube (6) is installed inside the injection needle upper seat (5), and a protective cover (7) is provided on the outside of the injection needle upper seat (5); A filter base (8) is installed inside the injection needle upper seat (5). A switching switch (9) is slidably connected inside the filter base (8). A first through hole (10) and a second through hole (11) are respectively opened inside the switching switch (9).

2. A novel precision filtration syringe according to claim 1, characterized in that: A filter membrane (12) is installed on the inner surface of the filter base (8), a pressure pad (13) is installed on the inner side of the filter base (8), and the filter membrane (12) is located on the lower surface of the pressure pad (13).

3. A novel precision filtration syringe according to claim 2, characterized in that: The pressure pad (13) and the injection needle upper seat (5) are both provided with a flow guide hole (14) inside.

4. A novel precision filtration syringe according to claim 1, characterized in that: The first through hole (10) and the second through hole (11) have the same diameter.

5. A novel precision filtration syringe according to claim 3, characterized in that: A sliding structure is formed between the conversion switch (9) and the injection needle upper seat (5).

6. A novel precision filtration syringe according to claim 5, characterized in that: The shape of the conversion switch (9) is T-shaped.

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