Injector pressure connector and injector

Abstract

The invention discloses an injector pressure connector and an injector, and the injector pressure connector comprises a pipeline body which is provided with a channel, and the side face of the channel is provided with a pipe side opening and a valve plate insertion opening; the axial direction of the pressure indicating cylinder intersects with the axial direction of the channel, a cylinder end opening is formed in the first end of the pressure indicating cylinder, the second end of the pressure indicating cylinder is closed, and the pressure indicating cylinder further comprises a cylinder side opening and a cylinder cavity; the indication piston comprises an indication piston head and an indication piston tail column, the indication piston head is opposite to the position of the pipe side opening, and the indication piston tail column can extend out of the pressure indication barrel from the barrel end opening; the first spring is used for providing resistance for movement of the indication piston; a pressure conduction pipe located between the cylinder-side opening and the valve plate socket; the pressure regulating piston comprises a pressure regulating piston head and a pressure regulating piston tail valve plate, the pressure regulating piston head is opposite to the cylinder side opening, and the pressure regulating piston tail valve plate can extend into the channel from the valve plate insertion opening; and the second spring is used for providing resistance for movement of the pressure regulating piston. According to the invention, overpressure injection can be avoided, and feedback control is agile.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a syringe pressure connector and a syringe. Background Art

[0002] In the medical field, it is often necessary to measure and indicate injection pressure. For example, when a patient is given spinal anesthesia, too high an injection pressure may damage the spinal nerves. Therefore, in order to prevent the injection pressure from being too high, it is necessary to display and limit the injection pressure. CN114403996A proposes an anesthesia puncture fixator that can guide the syringe using a support tube in a specified tilt angle, which helps to control the injection pressure to a certain extent. In the prior art, a valve is usually added to the outlet end of the syringe to limit the injection pressure near the spinal end, but such a limitation will cause a pressure difference between the syringe end and the spinal end, thereby making the pressure at the syringe end difficult to control, which in turn increases the risk of anesthesia surgery. Summary of the invention

[0003] In view of this, the present application proposes a syringe pressure connector and a syringe, which can solve the above existing technical problems. The present application provides the following technical solutions.

[0004] A syringe pressure connector, comprising: a pipeline body, the pipeline body having an inlet and an outlet, a channel between the inlet and the outlet, the side of the channel having a tube side opening and a valve plate socket; a pressure indicating tube, the axial direction of the pressure indicating tube intersects with the axial direction of the channel, the first end of the pressure indicating tube has a tube end opening, the second end of the pressure indicating tube is closed, the pressure indicating tube also includes a tube side opening and a tube cavity, the first end of the tube cavity abuts the tube end opening, and the second end of the tube cavity abuts the tube side opening; an indicating piston, the indicating piston is arranged inside the tube cavity, and comprises an indicating piston head and an indicating piston tail column, the indicating piston head abuts against the tube side opening, and the indicating piston tail column is provided. The opening positions are relatively, and the tail column of the indicating piston can extend out of the pressure indicating cylinder from the opening of the cylinder end; a first spring, the first spring is arranged inside the cylinder cavity, and is used to provide resistance to the movement of the indicating piston; a pressure transmission tube, the pressure transmission tube is located between the opening of the cylinder side and the valve plate socket; a pressure regulating piston, the pressure regulating piston is located inside the pressure transmission tube, and includes a pressure regulating piston head and a pressure regulating piston tail valve plate, the pressure regulating piston head is relatively to the opening of the cylinder side, and the pressure regulating piston tail valve plate can extend into the channel from the valve plate socket; a second spring, the second spring is arranged inside the pressure transmission tube, and is used to provide resistance to the movement of the pressure regulating piston.

[0005] Optionally, the height of the cylinder side opening is set to be flush with the height of the position of the indicating piston head when the pipeline pressure is equal to a preset threshold.

[0006] Optionally, the thickness of the indicating piston head is greater than or equal to the width of the barrel side opening.

[0007] Optionally, a sealing ring is provided between the indicating piston head and the cylinder cavity.

[0008] Optionally, a sealing gasket is provided near the valve plate socket.

[0009] Optionally, the indicating piston further comprises an indicating mark arranged on the piston tail column, and the indicating mark is used to indicate the injection pressure.

[0010] Optionally, it further includes: an exhaust hole, which is arranged on the pressure transmission tube and is located close to the valve plate socket.

[0011] Optionally, it further comprises: a gap, wherein the gap is arranged between the barrel end opening and the piston tail column.

[0012] Optionally, the axial direction of the pressure indicating tube and the axial direction of the channel are perpendicular to each other.

[0013] A syringe comprises the syringe pressure connector of the present application.

[0014] According to the technical solution of the present application, by designing the pressure indicator tube and the indicator piston, when the injection pressure increases, the indicator piston extends from the pressure indicator tube, which is convenient for the user to read the injection pressure; by designing the pressure transmission tube and the pressure regulating piston, the channel is automatically closed at the moment when the injection pressure exceeds the limit. Since the channel is closed instantly, that is, there is no process of slow closing of the channel during the injection of anesthetics, the channel can be kept fully open when it is unobstructed. Therefore, the syringe pressure connector can realize the instantaneous flexible switching between 100% opening and 0% opening, which can effectively avoid injection overpressure and realize agile feedback control. The syringe pressure connector and syringe of the present application also have the advantages of simple structure, convenient use, easy replacement, and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] For purposes of illustration and not limitation, the present application will now be described according to its preferred embodiments, particularly with reference to the accompanying drawings, in which:

[0016] Figure 1 is a perspective view of a syringe pressure connector according to an exemplary embodiment of the present application;

[0017] Figure 2 is a cross-sectional view of a syringe pressure connector according to an exemplary embodiment of the present application;

[0018] Figure 3 is a usage scenario diagram of a syringe pressure connector according to an exemplary embodiment of the present application;

[0019] FIG. 4A to FIG. 4C is a schematic diagram of the operation of a syringe pressure connector according to an exemplary embodiment of the present application.

[0020] In the figure: pipeline body 10, inlet 101, outlet 102, channel 103, tube side opening 104, valve plate socket 105, sealing gasket 106, pressure indicating tube 20, tube end opening 201, tube side opening 202, tube cavity 203, indicating piston 30, indicating piston head 301, indicating piston tail column 302, indicating mark 303, sealing ring 304, first spring 40, pressure transmission tube 50, pressure regulating piston 60, pressure regulating piston head 601, pressure regulating piston tail valve plate 602, second spring 70, exhaust hole 80, gap 90, syringe pressure connector 1, anesthesia needle 2, anesthesia syringe 3. DETAILED DESCRIPTION

[0021] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0022] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms such as "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In the description of the present application, the first end can be defined as the upper end or the top end shown in the picture, and the second end can be defined as the lower end or the bottom end shown in the picture, but this is only for example and not limitation.

[0023] like Figure 1 and Figure 2 As shown, the syringe pressure connector according to the exemplary embodiment of the present application mainly includes a pipeline body 10 , a pressure indicating cylinder 20 , an indicating piston 30 , a first spring 40 , a pressure transmission tube 50 , a pressure regulating piston 60 and a second spring 70 .

[0024] The pipeline body 10 has an inlet 101 and an outlet 102, and a channel 103 is provided between the inlet 101 and the outlet 102. The side of the channel 103 has a tube side opening 104 and a valve plate socket 105. In the syringe pressure connector of the embodiment of the present application, preferably but not necessarily, the inlet 101 adopts a Luer connector, which is easy to assemble, has a high connection firmness, and can resist separation caused by axial force and torque.

[0025] The axial direction of the pressure indicating tube 20 intersects with the axial direction of the channel 103. Preferably, the axial direction of the pressure indicating tube 20 and the axial direction of the channel 103 are perpendicular to each other, which is more in line with design habits and is easy to open molds for manufacturing.

[0026] The first end of the pressure indicating tube 20 is open and has a tube end opening 201; the second end of the pressure indicating tube 20 is closed. The pressure indicating tube 20 also includes a tube side opening 202 and a tube cavity 203. The first end of the tube cavity 203 abuts against the tube end opening 201, and the second end of the tube cavity 203 abuts against the tube side opening 104.

[0027] The indicating piston 30 is disposed inside the barrel cavity 203 and can move along the axial direction of the barrel cavity 203. The indicating piston 30 includes an indicating piston head 301 and an indicating piston tail post 302. The indicating piston head 301 is located opposite to the tube side opening 104. The indicating piston tail post 302 can extend out of the pressure indicating barrel 20 from the barrel end opening 201. Preferably, but not necessarily, the indicating piston 30 also includes an indicating mark 303 (such as Figure 2 As shown), the indicator mark 303 is used to indicate the injection pressure.

[0028] The first spring 40 is disposed inside the cylinder cavity 203 to provide resistance to the movement of the indicating piston 30. The first spring 40 is located between the inner surface of the first end of the pressure indicating cylinder 20 and the indicating piston head 301. Specifically, the first end of the first spring 40 abuts against the inner surface of the first end of the pressure indicating cylinder 20 (as shown in FIG. 4 , i.e., the lower surface of the cover body 201), and the second end of the first spring 40 abuts against the indicating piston head 301.

[0029] The pressure transmission tube 50 is located between the second opening 105 and the valve plate socket 105, and is used to connect the second opening 105 and the valve plate socket 105. The pressure transmission tube 50 preferably adopts a design with a smooth extension direction and no abrupt turns.

[0030] The pressure regulating piston 60 is located inside the pressure transmission tube 50 and can move along the axial direction of the pressure transmission tube 50. The pressure regulating piston 60 can include a pressure regulating piston head 601 and a pressure regulating piston tail valve plate 602. The pressure regulating piston head 601 is opposite to the barrel side opening 202. This relative position is not limited to the face-to-face opposition of the piston head 301 and the tube side opening 104, but refers to the absence of an obstruction between the pressure regulating piston head 601 and the barrel side opening 202, so that the anesthetic liquid can flow from the barrel side opening 202 into the pressure transmission tube 50 and then push the pressure regulating piston head 601. The pressure regulating piston tail valve plate 602 can extend into the channel 103 from the valve plate socket 105, thereby adjusting the opening of the channel 103.

[0031] The second spring 70 is disposed inside the pressure transmission tube 50 to provide resistance to the movement of the pressure regulating piston 60. The second spring 70 is located between the pressure regulating piston head 601 and the side wall of the channel 103 near the valve plate socket 105. Specifically, the first end of the second spring 70 abuts against the pressure regulating piston head 601, and the second end of the second spring 70 abuts against the side wall of the channel 103 near the valve plate socket 105.

[0032] It should be noted that in the syringe pressure connector of the embodiment of the present application, the height of the barrel side opening 202 is set to be flush with the height of the position of the indicating piston head 301 when the pipeline pressure is equal to the preset threshold. If the position of the barrel side opening 202 is too high, it means that the side of the pressure transmission tube 50 is difficult to open, and the pressure regulation feedback is delayed. When the indicating piston head 301 moves to the flush height, the pipeline pressure is already very high, and the risk is significantly increased. The setting of the opening of the side of the pressure transmission tube 50 is controlled by the elasticity of the first spring 40.

[0033] It should also be noted that in the syringe pressure connector of the embodiment of the present application, the thickness of the indicator piston head 301 is greater than or equal to the width of the barrel side opening 202. If the indicator piston head 301 is too thin, it may result in: the anesthetic liquid first enters the lower section of the barrel cavity 203 from the channel 103, and then pushes the indicator piston head 301 upward to the vicinity of the barrel side opening 202, and then the anesthetic liquid bypasses the thin indicator piston head 301 through the barrel side opening 202, and finally diffuses to the upper section of the barrel cavity 203, thereby causing the anesthetic liquid to be unable to flow completely to the pressure transmission tube 50, and unable to implement sensitive and reliable feedback control.

[0034] To enhance the sealing performance, in the syringe pressure connector of the embodiment of the present application, a sealing ring 304 may be provided between the indicating piston head 301 and the barrel cavity 203 to prevent the tube side opening 104 from being directly connected to the outside. Preferably, there may be multiple layers (e.g., three layers) of sealing rings 304 on the indicating piston head 301. In addition, a sealing gasket 106 may be provided near the valve plate socket 105 to prevent the valve plate socket 105 from being directly connected to the outside.

[0035] The syringe pressure connector of the embodiment of the present application may further include an exhaust hole 80, which is disposed on the pressure transmission tube 50 and is located close to the valve plate socket 105. The exhaust hole 80 is used to exhaust the gas below the pressure regulating piston head 601.

[0036] The syringe pressure connector of the embodiment of the present application may further include a gap 90, which is disposed between the barrel end opening 201 and the piston tail column 302. The gap 90 is used to exhaust air and provide a certain damping force.

[0037] Figure 3This is a usage scenario diagram of a syringe pressure connector according to an exemplary embodiment of the present application. As shown in the figure, the downstream of the syringe pressure connector 1 can be connected to an anesthesia needle 2, and the upstream can be connected to an anesthesia syringe 3.

[0038] FIG. 4A to FIG. 4C 1 is a schematic diagram of the working of the syringe pressure connector according to an exemplary embodiment of the present application. In the figure, arrows are used to indicate the flow direction of the anesthetic liquid.

[0039] like Figure 4A As shown, the anesthetic liquid mainly flows into the channel 103 from the inlet 101 and then flows out from the outlet 102. Part of the anesthetic liquid enters the barrel cavity 203 from the tube side opening 104, pushing the indicating piston head 301 of the indicating piston 30 upward, so that the piston tail column 302 of the indicating piston 30 extends upward from the barrel end opening 201. During the upward movement of the indicating piston 30, the first spring 40 provides movement resistance for the indicating piston 30 on the one hand, and on the other hand, the spring compresses and stores energy to facilitate the subsequent downward push of the indicating piston 30 to reset. The user can preliminarily judge the injection pressure based on the length of the piston tail column 302 exposed outside the pressure indicating barrel 20; in the embodiment with the indicating mark 303, the user can more intuitively and accurately know the injection pressure value by reading the indicating mark 303.

[0040] When the injection pressure gradually increases, a part of the anesthetic liquid will push the indicating piston 30 upward. At the same time, another part of the anesthetic liquid enters the pressure transmission tube 50 from the second opening 105, pushing the pressure regulating piston head 601 of the pressure regulating piston 60 to move downward, thereby driving the valve plate 602 at the tail of the pressure regulating piston to move downward and extend from the valve plate socket 105 into the channel 103, thereby reducing the flow cross-sectional area of ​​the channel 103, that is, reducing the opening of the channel 103. In the process of the pressure regulating piston 60 moving downward, the second spring 70 provides movement resistance for the pressure regulating piston 60 on the one hand, and on the other hand, the spring compresses and stores energy to facilitate the subsequent reset of the pressure regulating piston 60.

[0041] When the injection pressure increases to a preset threshold, the pressure regulating piston 60 moves downward significantly, and the valve plate 602 at the tail of the pressure regulating piston completely closes the channel 103. The anesthetic liquid cannot flow out of the outlet 102. Figure 4B shown.

[0042] The pressure in the injection pressure connector can be reduced by artificial pressure regulation and / or by using the gap to slowly release the pressure. Figure 4C As shown, the compressed second spring 70 pushes the regulating piston 60 upward, so that the valve plate 602 at the tail of the pressure regulating piston rises, the channel 103 is opened again, and the anesthetic liquid flows out from the outlet 102 again.

[0043] According to the syringe pressure connector of the embodiment of the present application, by designing the pressure indicator tube and the indicator piston, when the injection pressure increases, the indicator piston extends from the pressure indicator tube, which is convenient for the user to read the injection pressure; by designing the pressure transmission tube and the pressure regulating piston, the channel is automatically closed at the moment when the injection pressure exceeds the limit. Since the channel is closed instantly, that is, there is no process of slow closing of the channel during the injection of anesthetics, the channel can be kept fully open when it is unobstructed. Therefore, the syringe pressure connector can realize the instantaneous flexible switching between 100% opening and 0% opening, which can effectively avoid injection overpressure and realize agile feedback control. The syringe pressure connector of the present application also has the advantages of simple structure, convenient use, easy replacement, and wide application range.

[0044] The syringe according to the embodiment of the present application includes the syringe pressure connector of the present application. The syringe also has the advantages of simple structure, convenient use, easy replacement, wide application range, etc.

[0045] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A syringe pressure connector, characterized in that: include: A pipeline body (10), the pipeline body (10) having an inlet (101) and an outlet (102), a channel (103) between the inlet (101) and the outlet (102), and a side of the channel (103) having a pipe side opening (104) and a valve plate socket (105); A pressure indicating tube (20), wherein the axial direction of the pressure indicating tube (20) intersects with the axial direction of the passage (103), the first end of the pressure indicating tube (20) has a tube end opening (201), the second end of the pressure indicating tube (20) is closed, the pressure indicating tube (20) further comprises a tube side opening (202) and a tube cavity (203), the first end of the tube cavity (203) abuts against the tube end opening (201), and the second end of the tube cavity (203) abuts against the tube side opening (104); an indicating piston (30), the indicating piston (30) being arranged inside the cylinder cavity (203), comprising an indicating piston head (301) and an indicating piston tail post (302), the indicating piston head (301) being opposite to the tube side opening (104), and the indicating piston tail post (302) being able to extend out of the pressure indicating cylinder (20) from the cylinder end opening (201); a first spring (40), the first spring (40) being disposed inside the cylinder cavity (203) and being used to provide resistance to the movement of the indicating piston (30); A pressure transmission tube (50), the pressure transmission tube (50) being located between the cylinder side opening (202) and the valve plate socket (105); A pressure regulating piston (60), the pressure regulating piston (60) is located inside the pressure transmission tube (50), and comprises a pressure regulating piston head (601) and a pressure regulating piston tail valve plate (602), the pressure regulating piston head (601) is opposite to the cylinder side opening (202), and the pressure regulating piston tail valve plate (602) can extend from the valve plate socket (105) into the channel (103); A second spring (70), wherein the second spring (70) is disposed inside the pressure transmission tube (50) and is used to provide resistance to the movement of the pressure regulating piston (60).

2. The syringe pressure connector according to claim 1, characterized in that: The height of the cylinder side opening (202) is set to be flush with the height of the position of the indicating piston head (301) when the pipeline pressure is equal to a preset threshold.

3. The syringe pressure connector according to claim 1, characterized in that: The thickness of the indicating piston head (301) is greater than or equal to the width of the cylinder side opening (202).

4. The syringe pressure connector according to any one of claims 1 to 3, characterized in that: A sealing ring (304) is provided between the indicating piston head (301) and the cylinder cavity (203).

5. The syringe pressure connector according to any one of claims 1 to 3, characterized in that: A sealing gasket (106) is provided near the valve plate socket (105).

6. The syringe pressure connector according to any one of claims 1 to 3, characterized in that: The indicating piston (30) further comprises an indicating mark (303) arranged on the piston tail column (302), and the indicating mark (303) is used to indicate the injection pressure.

7. The syringe pressure connector according to any one of claims 1 to 3, characterized in that: Also includes: An exhaust hole (80) is disposed on the pressure transmission tube (50) and is located close to the valve plate socket (105).

8. The syringe pressure connector according to any one of claims 1 to 3, characterized in that: Also includes: A gap (90) is provided between the barrel end opening (201) and the piston tail column (302).

9. The syringe pressure connector according to any one of claims 1 to 3, characterized in that: The axial direction of the pressure indicating tube (20) and the axial direction of the channel (103) are perpendicular to each other.

10. A syringe, characterized in that: Comprising a syringe pressure fitting according to any one of claims 1 to 9.

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