Liquid path switch and hydraulic liquid conveying device thereof

Abstract

The utility model provides a liquid path switch and a hydraulic liquid conveying device thereof, a flow guide channel is arranged in a moving part of the liquid path switch, an input port and an output port of the flow guide channel are respectively positioned on the same side of the moving part, a first rubber plug is arranged on the input port, and a second rubber plug is arranged on the output port; the input needle is used for being inserted into the first rubber plug, and the input needle is used for conveying the driving liquid into the flow guide channel; the output needle is used for being inserted into the second rubber plug, and the output needle is used for leading out the driving liquid in the flow guide channel; the adjusting part is arranged on the moving part and used for driving the moving part to linearly move so as to control the insertion depth of the input needle and the output needle in the flow guide channel. The liquid path switch has the advantages of being compact in structure and high in space utilization rate. According to the hydraulic infusion device in the scheme, the circuit can be connected at the same time by turning on the liquid path switch, the problem that the operation sequence is not fool-proof when a user adds medicine and manually turns on the liquid-electric switch is solved, and therefore errors do not occur in the medicine adding process.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a liquid circuit switch and its hydraulic infusion device. Background Technology

[0002] Hydraulic infusion devices are used to administer intravenous fluids to the human body. Typically, the operation of a micro-pump is controlled by a liquid circuit switch. When the liquid circuit switch is open, the micro-pump delivers driving fluid to the piston chamber of the drug reservoir, which then infuses the drug solution in the reservoir into the human body through the injection needle.

[0003] Existing liquid circuit switches typically have the input and output ports on opposite sides. As a result, the insertion depth of the connecting pins at the input and output ports differs when the switch is moved, creating a large space requirement for the liquid circuit switch.

[0004] Therefore, the technical problem that this application needs to solve is: how to optimize the structure of the liquid circuit switch in order to reduce the space occupied by the liquid circuit switch. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes a hydraulic circuit switch and its hydraulic infusion device. The hydraulic circuit switch has the advantages of compact structure, convenient adjustment and high space utilization. In the hydraulic infusion device, opening the hydraulic circuit switch can simultaneously connect the circuit, which solves the problem of the user's operation sequence of adding medicine and manually opening the hydraulic switch is not foolproof, thus preventing errors in the medicine adding process.

[0006] Specifically, this utility model proposes a liquid circuit switch, which includes:

[0007] The moving part is provided with a flow guiding channel, the inlet and outlet of the flow guiding channel are located on the same side of the moving part, and the inlet is provided with a first rubber plug and the outlet is provided with a second rubber plug.

[0008] An input needle is used to insert into a first rubber stopper and to deliver driving fluid into a guide channel.

[0009] An output needle is used to insert into a second rubber stopper and to draw out the driving fluid in the guide channel.

[0010] An adjustment section is provided on the moving section and is used to drive the moving section to move linearly to control the insertion depth of the input needle and the output needle in the guide channel.

[0011] Preferably, the flow channel is U-shaped.

[0012] Furthermore, this application also proposes a hydraulic fluid delivery device including the aforementioned fluid circuit switch.

[0013] Preferably, it also includes a housing, the inner cavity of which is provided with a driving fluid storage device, an infusion pump, a drug reservoir, and a battery.

[0014] The medicine storage device has a piston chamber, and a piston part is provided in the piston chamber. The piston part is used to divide the piston chamber into a driving chamber and a medicine liquid chamber.

[0015] The drive fluid storage device is connected to the input needle through a first pipeline;

[0016] The infusion pump's input end is connected to the output needle via a second pipeline, and the infusion pump's output end is connected to the drive chamber of the drug reservoir via a third pipeline. The drug reservoir's liquid chamber is provided with a drug outlet channel, and the drug outlet channel is connected to the injection needle component via a fourth pipeline.

[0017] The battery powers the infusion pump, and a membrane switch is provided in the circuit between the battery and the infusion pump. The moving part is used to simultaneously turn the membrane switch and the liquid circuit switch on or off.

[0018] Preferably, the housing is provided with a dosing channel that communicates with the liquid medicine chamber, the adjusting part is slidably installed in the groove of the housing, and the adjusting part is used to block the inlet of the dosing channel.

[0019] Preferably, the injection needle component includes a soft needle and a soft needle seat. The soft needle is mounted on the soft needle seat, and the soft needle seat is provided with a drug flow channel. The outlet of the drug flow channel communicates with the injection hole of the soft needle. The side of the soft needle seat is provided with a drug inlet that communicates with the drug flow channel. The drug inlet is used to connect to a fourth pipeline.

[0020] The bottom of the soft needle hub is provided with an annular metal plate.

[0021] Preferably, the housing has a through mounting opening, and an annular support plate is fixed in the mounting opening;

[0022] The annular support plate is provided with a detection electrode assembly, which is energized by contacting the annular metal sheet to form a detection current.

[0023] Preferably, the housing is provided with a rotating engagement groove, which is used to install the first latching part of the needle insertion device.

[0024] Preferably, the lower end of the soft needle seat is provided with a second latching part, which is used to fasten the annular support plate.

[0025] Preferably, the inner cavity of the housing is further provided with a liquid detection chamber, which communicates with the installation port;

[0026] Furthermore, the drug solution detection chamber is equipped with two electrode wires that are far apart from each other, which are used to detect whether there is any drug solution dripping to determine whether the drug solution is full. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0028] Figure 1 This is a schematic diagram of the internal structure of the hydraulic infusion device including the liquid circuit switch in this embodiment;

[0029] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0030] Figure 3 This is a top view of the hydraulic infusion device in this embodiment.

[0031] Figure 4 yes Figure 3 Cross-sectional view along the BB direction;

[0032] Figure 5 yes Figure 3 A cross-sectional view along the CC direction;

[0033] Figure 6 This is a three-dimensional structural diagram of the hydraulic infusion device in this embodiment;

[0034] Figure 7 This is a schematic diagram showing the location of the drug detection chamber in this embodiment;

[0035] Figure 8 This is a three-dimensional structural diagram of the needle insertion device.

[0036] The reference numerals used in the attached figures are as follows:

[0037] 11-Moving part; 12-Flow guide channel; 13-First rubber stopper; 14-Second rubber stopper; 15-Inlet needle; 16-Outlet needle; 17-Adjusting part; 18-Housing; 19-Drive fluid storage device; 20-Infusion pump; 21-Drug reservoir; 22-Piston part; 23-Drug chamber; 24-First tubing; 25-Second tubing; 26-Third tubing; 27-Drug outlet channel; 28-Fourth tubing; 29-Drug dispensing Flow channel; 30-Soft needle; 31-Soft needle seat; 32-Drug flow channel; 33-Drug inlet; 34-Annular metal plate; 35-Mounting port; 36-Annular support plate; 37-Detection electrode assembly; 38-Rotating locking groove; 39-Needle insertion device; 40-First locking part; 41-Second locking part; 42-Drug detection chamber; 43-Battery; 44-Membrane switch; 45-Arc-shaped slot; 46-Vertical unlocking port Detailed Implementation

[0038] The technical solutions of this application will be further described below with reference to specific embodiments, but this application is not limited to these embodiments.

[0039] like Figures 1 to 8 As shown, this embodiment proposes a liquid circuit switch, such as... Figure 1 and Figure 2 As shown, the liquid circuit switch includes:

[0040] The moving part 11 is provided with a flow channel 12. The inlet and outlet of the flow channel 12 are located on the same side of the moving part 11, and the inlet is provided with a first rubber plug 13 and the outlet is provided with a second rubber plug 14.

[0041] The input needle 15 is used to insert into the first rubber stopper 13 and to deliver the driving fluid to the guide channel 12.

[0042] Output needle 16 is used to insert into the second rubber stopper 14 and to draw out the driving fluid in the guide channel 12.

[0043] Adjustment part 17 is fixed on the moving part 11 and is used to drive the moving part 11 to move linearly to control the insertion depth of the input needle 15 and the output needle 16 in the guide channel 12.

[0044] The technical advantages of this solution are as follows: It proposes a specific structure for a liquid circuit switch, which has the advantage of convenient adjustment. Furthermore, the input pin 15 and the output pin 16 are located on the same side of the moving part 11, ensuring that the insertion depth of the input pin 15 and the output pin 16 is always the same. It also has the advantage of small size, effectively solving the space occupation problem of the liquid circuit switch.

[0045] Furthermore, the flow channel 12 is U-shaped.

[0046] Furthermore, this application also proposes a hydraulic fluid delivery device including the aforementioned fluid circuit switch.

[0047] As one implementation method of this embodiment, such as Figure 1 As shown, it also includes a housing 18, and the inner cavity of the housing 18 is provided with a driving fluid storage device 19, an infusion pump 20 and a medicine storage container 21, wherein the driving fluid storage device 19 is a storage bag.

[0048] The medicine reservoir 21 has a piston chamber, within which a piston portion 22 is provided. The piston portion 22 divides the piston chamber into a drive chamber and a medicine liquid chamber 23; wherein, attached Figure 1 Since the piston section 22 is located at the bottom of the piston chamber, the drive chamber is not visible at this time. The drive chamber can only be displayed when the piston section 22 rises.

[0049] Combination Figure 1 and Figure 2 As shown, the drive fluid storage device 19 is connected to the input needle 15 through the first pipe 24;

[0050] The input end of the infusion pump 20 is connected to the output needle 16 through the second pipeline 25, and the output end of the infusion pump 20 is connected to the drive chamber of the drug reservoir 21 through the third pipeline 26. The drug reservoir 21 has a drug outlet channel 27 on the drug liquid chamber 23, and the drug outlet channel 27 is used to connect the injection needle component through the fourth pipeline 28.

[0051] Furthermore, it also includes a battery 43, which powers the volumetric micropump. A membrane switch 44 is provided in the circuit between the battery 43 and the volumetric micropump. Figure 1 As shown, when the moving part 11 moves toward the input needle 15 and the output needle 16, the moving part 11 squeezes the membrane switch 44, thereby activating the volumetric micropump.

[0052] This solution proposes a specific structure for a hydraulic infusion device, wherein the infusion pump 20 is a positive displacement micro pump.

[0053] In this solution, the liquid circuit switch is turned on and off by pushing the adjustment unit 17. When the liquid circuit switch is turned on, the volumetric micropump is used to deliver the driving liquid in the driving liquid storage device 19 to the piston chamber, thereby causing the piston 22 to move, and then the drug liquid in the drug liquid chamber 23 is sent to the injection needle component through the drug outlet channel 27 and the fourth pipeline 28.

[0054] As one embodiment of this invention, the housing 18 is provided with a drug delivery channel 29 that communicates with the drug liquid chamber 23. The adjustment part 17 is slidably installed in the groove of the housing 18, and the adjustment part 17 is used to block the entrance of the drug delivery channel 29.

[0055] In the initial state, the regulating unit 17 blocks the inlet of the drug delivery channel 29. When it is necessary to inject drugs into the drug delivery channel 29, the regulating unit 17 is manually pushed. At this time, the liquid circuit switch is turned on, the circuit of the volumetric micropump is turned on, and the inlet of the drug delivery channel 29 is opened. This solves the problem of the user not being able to prevent mistakes in the order of drug delivery and manually turning on the liquid-electric switch, thus preventing errors in the drug delivery process.

[0056] As one implementation method of this embodiment, combined with such Figure 4 and Figure 5As shown, the injection needle component includes a soft needle 30 and a soft needle seat 31. The soft needle 30 is mounted on the soft needle seat 31. The soft needle seat 31 is provided with a drug flow channel 32. The outlet of the drug flow channel 32 is connected to the injection hole of the soft needle 30. The side of the soft needle seat 31 is provided with a drug inlet 33 that is connected to the drug flow channel 32. The drug inlet 33 is used to connect to the fourth pipeline 28.

[0057] like Figure 8 As shown, the bottom of the soft needle holder 31 is provided with an annular metal plate 34.

[0058] Furthermore, in combination Figure 4 , Figure 6 and Figure 8 A mounting port 35 is provided through the housing 18, and an annular support plate 36 is fixed in the mounting port 35.

[0059] The annular support plate 36 is provided with a detection electrode assembly 37, which is energized through contact with the annular metal sheet 34 to form a detection current.

[0060] The technical advantage of this solution is that it can determine whether the soft needle 30 is properly installed. It then notifies the user that the needle insertion is complete via the user interface or sound, thus concluding the needle insertion process.

[0061] As one implementation method of this embodiment, combined with Figure 7 and Figure 8 As shown, the housing 18 is provided with a rotating engagement groove 38, which is used to install the first latching part 40 of the needle insertion device 39.

[0062] The rotating locking groove 38 has interconnected arc-shaped locking grooves 45 and vertical unlocking openings 46. The first locking part 40 of the needle insertion device 39 is inserted into the vertical unlocking opening 46, and then the needle insertion device 39 is rotated clockwise. At this time, the first locking part 40 enters the arc-shaped locking groove 45 and completes the locking. When the needle insertion device 39 is rotated counterclockwise, the first locking part 40 rotates to below the vertical unlocking opening 46, and the needle insertion device 39 can be pulled upwards. During the removal process, the needle insertion device 39 has a hard needle that passes through the inner hole of the soft needle 30. The soft needle 30 and the needle insertion device 39 are connected by the hard needle. Therefore, during the removal process, the soft needle 30 will remain in the mounting opening 35.

[0063] The top of the soft needle holder 31 is provided with a sealing plug for sealing the top of the soft needle holder 31, and the soft needle holder 31 has a sealing and dustproof function by filling the mounting port 35.

[0064] As one implementation method of this embodiment, combined with Figure 4 , Figure 7 and Figure 8As shown, the lower end of the soft needle holder 31 is provided with a second latching part 41, which is used to fasten the annular support plate 36. The technical advantage of this solution is that it allows for a tight installation of the soft needle holder 31.

[0065] As one implementation method of this embodiment, such as Figure 7 As shown, the inner cavity of the housing 18 is also provided with a liquid detection chamber 42, which is connected to the mounting port 35.

[0066] Furthermore, the medicine detection chamber 42 is equipped with two electrode wires that are far apart from each other, used to detect whether medicine is dripping to determine whether the medicine is full. The electrode wires are not shown in the attached diagram.

[0067] The working principle of this solution is as follows:

[0068] The first step is to install the needle insertion device 39 on the mounting port 35 of the housing 18.

[0069] The second step involves pushing the adjustment unit 17 to open the inlet of the drug delivery channel 29. At this time, the volumetric micro-pump and the liquid circuit switch work simultaneously, and the injection needle of the external syringe connects with the drug chamber 23, delivering the drug to the drug chamber 23 vertically. When the drug chamber 23 is full of drug, the drug delivery continues, and the drug drips from the edge of the drug inlet 33 of the soft needle seat 31. The drug flows into the drug detection chamber 42, energizing the two electrode wires. The current is then detected by the circuit to determine that the drug delivery is complete. The product determines that the drug is full by detecting the current and reminds the user that "the drug delivery is complete" through the operation interface or sound.

[0070] During self-start, the gas in the volumetric micro-pump and the bottom cover of the drug reservoir 21 can also be discharged from the waterproof and breathable membrane of the drug base through the flow channel to further optimize the driving effect until the bottom cover of the drug reservoir 21 is filled with driving fluid. After the drug addition and self-starting procedures are completed, the drug base is removed and the main unit is applied to the human body.

[0071] The third step is that the needle insertion device 39 works and completes the insertion of the soft needle 30 into the human tissue. Then the needle insertion device 39 is removed from the housing 18, and the soft needle seat 31 remains in the mounting port 35 of the housing 18.

[0072] Fourth, after the user sets the pumping plan, the device is turned on again. The pump chamber of the volumetric micropump generates negative pressure, which draws the driving fluid from the storage bag into the volumetric micropump through the first pipe 24, the input needle 15, the guide channel 12, the output needle 16, and the second pipe 25.

[0073] Then the driving fluid flows into the driving chamber through the third pipe 26. As the hydraulic pressure inside the driving chamber continues to rise, until the thrust acting on the bottom of the piston 22 is greater than the static friction of the piston 22, the piston 22 moves forward, thereby pushing the liquid medicine along the drug outlet channel 27 of the top cover of the drug reservoir 21 and the fourth pipe 28 into the liquid medicine channel 32 inside the soft needle seat 31. Finally, the liquid medicine is injected into the human body through the soft needle 30.

[0074] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A liquid circuit switch, characterized in that, The liquid circuit switch includes: The moving part (11) is provided with a flow channel (12), the inlet and outlet of the flow channel (12) are located on the same side of the moving part (11), and the inlet is provided with a first rubber plug (13) and the outlet is provided with a second rubber plug (14). Input needle (15), the input needle (15) is used to insert into the first rubber stopper (13), and the input needle (15) is used to deliver the driving fluid to the guide channel (12); Output needle (16), the output needle (16) is used to insert into the second rubber stopper (14), and the output needle (16) is used to draw out the driving fluid in the guide channel (12); An adjustment part (17) is provided on the moving part (11) for driving the moving part (11) to move linearly to control the insertion depth of the input needle (15) and the output needle (16) in the guide channel (12).

2. The liquid circuit switch according to claim 1, characterized in that, The flow channel (12) is U-shaped.

3. A hydraulic infusion device, characterized in that, Includes the liquid circuit switch as described in claim 1 or 2.

4. The hydraulic infusion device according to claim 3, characterized in that, It also includes a housing (18), the inner cavity of which is provided with a driving fluid storage device (19), an infusion pump (20), a drug reservoir (21), and a battery (43). The medicine storage device (21) has a piston chamber, and a piston part (22) is provided in the piston chamber. The piston part (22) is used to divide the piston chamber into a driving chamber and a medicine liquid chamber (23). The drive fluid storage device (19) is connected to the input needle (15) through the first pipeline (24); The input end of the infusion pump (20) is connected to the output needle (16) through the second pipeline (25), and the output end of the infusion pump (20) is connected to the drive chamber of the drug reservoir (21) through the third pipeline (26). The drug reservoir (21) has a drug outlet channel (27) on its drug chamber (23), and the drug outlet channel (27) is used to connect to the injection needle component through the fourth pipeline (28). The battery (43) is used to power the infusion pump (20), and a membrane switch (44) is provided on the circuit between the battery (43) and the infusion pump (20). The moving part (11) is used to simultaneously turn the membrane switch (44) and the liquid circuit switch on or off.

5. The hydraulic infusion device according to claim 4, characterized in that, The housing (18) is provided with a drug delivery channel (29) that communicates with the liquid medicine chamber (23). The adjustment part (17) is slidably installed in the groove of the housing (18), and the adjustment part (17) is used to block the inlet of the drug delivery channel (29).

6. The hydraulic infusion device according to claim 4, characterized in that, The injection needle component includes a soft needle (30) and a soft needle seat (31). The soft needle (30) is mounted on the soft needle seat (31). The soft needle seat (31) is provided with a drug flow channel (32). The outlet of the drug flow channel (32) is connected to the injection hole of the soft needle (30). The side of the soft needle seat (31) is provided with a drug inlet (33) that is connected to the drug flow channel (32). The drug inlet (33) is used to connect to the fourth pipeline (28). The bottom of the soft needle holder (31) is provided with an annular metal plate (34).

7. The hydraulic infusion device according to claim 6, characterized in that, The housing (18) is provided with a through mounting port (35), and an annular support plate (36) is fixed in the mounting port (35); The annular support plate (36) is provided with a detection electrode assembly (37). The detection electrode assembly (37) is energized by contacting the annular metal plate (34) to form a detection current, which is used to determine whether the soft needle holder (31) is installed in place.

8. The hydraulic infusion device according to claim 4, characterized in that, The housing (18) is provided with a rotating engagement groove (38), which is used to install the first latching part (40) of the needle insertion device (39).

9. The hydraulic infusion device according to claim 7, characterized in that, The lower end of the soft needle seat (31) is provided with a second latching part (41), which is used to fasten the annular support plate (36).

10. The hydraulic infusion device according to claim 7, characterized in that, The inner cavity of the housing (18) is also provided with a liquid detection chamber (42), which is in communication with the installation port (35); The drug detection chamber (42) is equipped with two electrode wires that are far apart from each other, which are used to detect whether there is drug dripping to determine whether the drug is full.

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