Automatic injection device

Abstract

To provide an automatic injection device in which not only a solution for an injection syringe is automatically injected but also the injection syringe is automatically attached.SOLUTION: A device for automatically attaching an injection syringe and injecting a parenteral solution comprises: a mounting part 100 including a stationary mounting base 110 to which an external cylinder of the injection syringe is attached and a mobile mounting base 160 to which a push rod of the injection syringe is attached; a compression part 200 for applying pressure to a thumb push part of the push rod of an injection syringe attached to the mounting part; and a drive part for operating the compression part. A button for switching to a state where the mobile mounting base can move is provided on the bottom of the stationary mounting base. When the injection syringe is placed so that a finger hook of the injection syringe is in a fitting groove 150 between the stationary mounting base and the mobile mounting base, the button is pressed, the mobile mounting base moves toward the stationary mounting base and the injection syringe is fixed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an automatic injection device, and more particularly to a device that automatically attaches a syringe and automatically pumps a medicinal liquid from the attached syringe. [Background technology]

[0002] During hemodialysis, the patient's blood leaves the body and passes through the dialyzer. If blood clots during this process, problems such as clogged dialyzer filters, blood circulation problems, and reduced dialysis efficiency may occur. In response to this, anticoagulants such as heparin are injected using a syringe, but the syringe is usually shaped as shown in Figure 8, and when injected manually, problems such as inaccuracy in the injection amount, lack of consistency, risk of infection, and medical staff mistakes occur again. Therefore, to solve these problems, methods of injecting heparin using automatic injection systems and pumps have been developed and are widely used. However, in conventional injection systems, although the injection is performed automatically, it is necessary to accurately attach the syringe to the holder, and there are problems with not monitoring the status of heparin injection. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Republic of Korea Patent Publication No. 10-2018-0071213 (2018.06.27) Summary of the Invention [Problem to be solved by the invention]

[0004] An object of one aspect of the present invention is to provide an automatic injection device that not only automatically injects a medicinal solution from a syringe, but also automatically attaches the syringe.

[0005] Another object of the present invention is to provide a hemodialysis apparatus capable of monitoring the pressure of an automatic injection device in real time. [Means for solving the problem]

[0006] The automatic injection device according to the present invention is a device for automatically mounting a syringe and injecting a syringe liquid, and includes a mounting unit (100) including a fixed mounting base (110) on which the barrel of the syringe is mounted and a movable mounting base (160) for clamping and fixing the finger hook of the syringe between the fixed mounting base; a pressure unit (200) for pressing the push rod thumb rest of the syringe mounted on the mounting base (100); and a drive unit (600) for moving the pressure unit (200). Moreover, a button (120) is provided on the bottom surface of the fixed mounting base (110) for switching the movable mounting base (160) to a movable state, and when the syringe is placed in the mounting groove (150) between the fixed mounting base (110) and the movable mounting base (160) with the finger hook of the syringe positioned, the button (120) is pressed, and the movable mounting base (160) moves toward the fixed mounting base (110) to fix the syringe.

[0007] At this time, it is preferable to provide a detection sensor (170) for detecting that the syringe is seated on the device base. It is also preferable that the pressurizing section (200) includes a pressurizing unit (210) and a load cell (220) provided inside the pressurizing unit (210) for detecting the applied pressure. It is also preferable that the movable mount (160) moves toward the fixed mount (110) by the restoring force of a return spring (430) when the button (120) is pressed.

[0008] Also, the movable mount (160) may include a cover part (300) that provides a surface on which the fixed mount (110) is installed, has a return spring groove (320) for seating the return spring (430) and a button mounting groove (330) for mounting the button (120), and covers the driving part (600). In this case, the movable mount (160) may include a contact part (163) that directly contacts the push rod of the syringe, and a receiving part (161) that is bent from the contact part (163) toward the fixed mount (110).

[0009] Also, it is preferable that the fixed mounting base (110) further includes a receiving groove (140) for receiving the receiving portion (161).

[0010] Furthermore, the movable mounting base (160) is provided with a first pin (165) protruding downward, The cover portion (300) has a second pin (420) protruding upward, Each end of the first pin (165) and the second pin (420) are preferably connected to opposite ends of the return spring which seats in the return spring groove.

[0011] In this case, it is preferable that the pressure unit (200) is connected to the driving shaft (620) of the driving unit (600) and the linear actuator (250) to perform linear motion. It is also preferable that the pressure unit (200) includes a first plate provided on the bottom surface of the cover unit; and a second plate that is spaced a predetermined distance from the first plate and provides a surface on which a driving shaft casing (630) for protecting the driving shaft (620) is installed, and that includes limit switches (510a, 510b) for specifying the range in which the linear actuator moves, and that includes a sensing target (520) recognized by the limit switches (510a, 510b) on the outer surface of the linear actuator.

[0012] It is preferable that the apparatus further comprises a control unit (700) for receiving signals from the detection sensor (170), the limit switches (510a, 510b), and the load cell, and controlling the drive motor (610). In this case, it is preferable that the detection sensor (170) comprises at least two or more sensors selected from the group consisting of a first detection sensor for detecting the fastening of the movable mount, a second detection sensor for detecting a fastening error due to a thickness of the finger hook of the syringe, and a third detection sensor for detecting the presence or absence of movement of the movable mount (160). Another aspect of the present invention is a hemodialysis equipment equipped with the above-mentioned automatic injection device. Effect of the Invention

[0013] The present invention automates both the attachment of the syringe and the pumping of the injection liquid, and enables monitoring to immediately detect any malfunctions during injection, allowing for rapid response when malfunctions or problems are immediately detected, reducing the risk of over- or under-injection of drugs. In addition, automation shortens the administration time and process of the injection liquid, maximizing patient safety and therapeutic effects, and increasing the efficiency and satisfaction of medical services. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view of an automatic injection device according to an embodiment of the present invention. [Diagram 2] 1 is an exploded structural view showing an automatic injection device according to an embodiment of the present invention. [Diagram 3] 1 is a perspective view showing a first plate (400) and a movable mount (160) according to an embodiment of the present invention. [Figure 4] 1 is a side view of an automatic injection device according to an embodiment of the present invention. [Diagram 5] 2 is a rear view of an automatic injection device according to an embodiment of the present invention. [Figure 6] 2 is a signal configuration diagram of an automatic injection device according to one embodiment of the present invention. [Figure 7] 4 is an explanatory diagram illustrating the operation of the automatic injection device of the present invention. FIG. [Figure 8] This is a structural diagram of a typical syringe. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] In the following detailed description of the present invention, it should be understood that the terms used herein are for the purpose of describing specific embodiments and do not limit the scope of the present invention, which is limited only by the appended claims. All technical and scientific terms used herein have the same meaning as commonly understood by a person of ordinary skill in the art, unless otherwise specified. Throughout this specification and claims, unless otherwise specified, the terms "comprise", "comprises", and "comprising" are used to mean the inclusion of a referenced item, step, or group of items and steps, and are not used to exclude any other item, step, or group of items or groups of steps. In addition, in the drawings, the width, length, thickness, angle, and the like of components may be exaggerated for convenience. The drawings are generally described from the viewpoint of the viewer, and when one component is described as being "above / below" or "above / below" another component, this includes not only the case where the other component is "directly above / directly below" the other component, but also the case where the other component is present between them. Meanwhile, the multiple embodiments of the present invention may be combined with any other embodiment unless clearly indicated to the contrary. In particular, any feature indicated as being desirable or advantageous may be combined with any other feature or features indicated as being desirable or advantageous.

[0016] An automatic injection device according to an embodiment of the present invention will now be described in more detail with reference to the drawings. Figure 1 is a perspective view of an automatic injection device according to an embodiment of the present invention, and Figure 2 is an exploded structural view of the automatic injection device according to an embodiment of the present invention. According to the drawings, the automatic injection device includes a mounting part (100), a pressurizing part (200), a cover part (300), a first plate (400), a second plate (500), and a driving part (600). The mounting part (100) is a part for mounting a syringe, and includes a fixed mounting base (110) and a movable mounting base (160).

[0017] In this case, a typical syringe is composed of an outer cylinder, a plunger, and a needle, with the needle connected to one end of the outer cylinder and a finger hook formed on the other end, a thumb rest attached to one end of the plunger, and a rubber packing attached to the other end. Thus, the finger hook is usually used to hold the syringe with the thumb and index finger, and when the thumb presses the thumb rest, the plunger moves forward, allowing the injection liquid to be injected through the needle.

[0018] The fixed mount (110) is a device base that is installed and fixed at one end of the cover part (300) and is a device base on which the barrel of the syringe is seated. The movable mount (160) can move in the opposite direction to or close to the fixed mount (110). That is, when the syringe is fixed to the mounting part (100), the movable mount (160) moves in a direction from a position separated from the fixed mount (110) to a position where the movable mount (160) closes to the fixed mount (110), and when the syringe is removed from the mounting part (100), the movable mount (160) moves in a direction away from the fixed mount (110).

[0019] It is preferable that the movable mount (160) includes a contact portion (163) that contacts the finger hook of the syringe, and a receiving portion (161) that extends from the bottom surface of the contact portion (163) toward the fixed mount (110). In this case, the fixed mount (110) has a receiving groove (140) into which the receiving portion (161) can be inserted. This allows the movable mount (160) to easily move toward the fixed mount (110).

[0020] The space between the fixed mount 110 and the movable mount 160 is called the mounting groove 150, and the finger hook of the syringe fits into the mounting groove 150. The mounting groove 150 expands and contracts in size in response to the movement of the movable mount 160.

[0021] Although the mechanism for moving the movable mount (160) is not limited, one embodiment of the present invention will be described with reference to Fig. 3. Fig. 3 is a perspective view showing a first plate (400) and the movable mount (160) according to an embodiment of the present invention. According to this, the movable mount (160) includes a contact part (163) that contacts the finger hook of the syringe and a receiving part (161) that extends from the bottom surface of the contact part (163). The receiving part (161) is installed on a cover part (300) described later, and moves together with the contact part (163) as a whole.

[0022] The receiving part (161) is provided with a first pin (165) and a button hole (167). The first pin (165) extends downward from the receiving part (161) and is installed at a position facing the second pin (420) extending upward from the first plate (400) and the return spring (430) therebetween. In other words, the return spring (430) is installed between the first pin (165) and the second pin (420).

[0023] The buttonhole (167) is a hole through which the button (120) passes, and when the button does not pass completely through the buttonhole, the button is fixed and the movable mount does not move. On the other hand, when the button descends to the point where it passes completely through the buttonhole, the constraint of the movable mount (160) is released and it becomes movable.

[0024] Meanwhile, the button (120) is mounted on the mounting surface of the fixed mounting base (110) and has a button spring hole on its underside, so that the button (120) can move up and down by the button spring that fits into the button spring hole. Therefore, when the button (120) is not pressed and is at the top, the button (120) protrudes from the receiving part (161), so that the button (120) cannot come out of the button hole (167) and cannot move. However, when a syringe is placed on the button (120) and force is applied, the button (120) is pressed and the button (120) comes out of the button hole (167), so that it becomes movable.

[0025] At this time, a return spring installed between the first pin (165) and the second pin (420) is activated, and the movable mount (160) moves toward the fixed mount (110), so that the finger hook of the syringe is sandwiched between the movable mount (160) and the fixed mount (110), and the syringe is fixed. At this time, it is preferable that the button (120) has two wings and a spring hole is provided on the underside of each wing so that the button is pressed in a balanced manner.

[0026] That is, when the syringe is placed on the device base, the button (120) is automatically pressed, and when the button (120) is pressed, the movable mount (160) is released from the state of being restricted by the button (120) and becomes movable. At this time, when it becomes movable, it moves to the fixed mount (110) due to the restoring force of the return spring (430) that was relaxed between the first pin (165) and the second pin (420), and is fixed in an accurate position without the need to check whether the front end or rear end of the syringe is inserted correctly.

[0027] The pressure applying part (200) is a part that applies a constant pressure to the push rod of the syringe after the syringe is attached and fixed, and includes a load cell (220), a pressure applying unit (210), a linear guide (240), and a linear actuator (250). The pressure applying part (200) will be further described with reference to Figure 4. Figure 4 is a side view of an automatic injection device according to an embodiment of the present invention.

[0028] The pressure unit (210) is the part that directly contacts the thumb rest of the syringe and presses the push rod. Inside the pressure unit (210) is a load cell, which is a sensor that converts load or force into an electrical signal, and thus the pressure of the injection liquid injected from the pressure unit (200) can be measured.

[0029] The linear guide (240) is slidably coupled to the sliding groove (410) of the first plate (400) so that the connected pressure unit (210) presses the thumb rest of the syringe push rod. The linear actuator (250) converts the drive shaft (620) or the rotational drive force of the drive shaft (620) into linear motion and transmits it to the linear guide (240).

[0030] The linear actuator (250) is equipped with a sensing target (520) that is detected by limit switches (510a, 510b) mounted on the second plate (500). The limit switches (510a, 510b) control the movement of the linear actuator (250), and when the actuator (250) reaches a desired position, the limit switches are activated to automatically stop the movement of the actuator (250). In this case, the limit switches are preferably photomicrosensors.

[0031] The cover part (300) is installed on the first plate (400) to cover the driving part and other machinery so that they are not exposed, and to provide a surface on which the fixed mount (110) is installed. It also has a return spring groove (320) for receiving the return spring (430) and a button mounting groove (330) for mounting the button (120).

[0032] A return spring is accommodated in the return spring groove (320), and both ends of the return spring are connected to a first pin (165) extending downward from the movable mounting base (160) and a second pin (420) extending upward from the cover part (300), respectively. In this case, it is preferable that there are two each of the first pin (165), return spring (430), and second pin (420).

[0033] That is, the first pin (165) is a pin of a certain length that extends from the bottom surface of the movable mounting base (161) to one end of the return spring groove, and the second pin (420) is a pin of a certain length that extends from the top surface of the cover part (300) to the other end of the return spring groove. A return spring (430) is provided between these two pins, and when the button (120) is in a movable state, the return spring (430) moves toward the first pin (165) and the second pin (420) due to its restoring force.

[0034] The return spring (320) between the first pin (165) and the second pin (420) is relaxed when the button (120) is not pressed, but the movable mount (160) is caught by the button and cannot move. When the syringe is placed and the button (120) is pressed, the first pin moves with the restoring force of the return spring (320), and the movable mount (160) also moves.

[0035] Once the injection of the injection liquid is completed, the movable mount (160) is moved in the opposite direction from the fixed mount (110), and the button returns to the buttonhole (167) as it passes through the buttonhole due to the button spring.

[0036] Also, the cover part (300) is provided with an opening groove (310) that is opened to expose the sliding groove (410) of the first plate (400) and the pressing part (200).

[0037] The first plate (400) provides a sliding platform (410) along which the pressure unit (200) moves, and is located at the bottom of the cover. The driving unit (600) includes a driving motor (610), a driving shaft (620), and a driving shaft casing (630). The driving motor (610) transmits power to the driving shaft (620) and is preferably equipped with a step motor. The driving shaft casing (630) is installed on the second plate (500) described below, and the driving shaft (620) is protected inside the driving shaft casing (630).

[0038] The second plate (500) is a part that is installed at a predetermined distance from the first plate, and houses the mechanism of the drive system, such as the drive shaft (620) driven by the drive motor (610). A space is secured between the first plate (400) and the second plate (500) by a spacer or the like.

[0039] 6 is a signal configuration diagram of an automatic injection device according to one embodiment of the present invention. According to this, the automatic injection device includes a detection sensor (170) that detects the attachment of a syringe to the device stand, a load cell installed in the pressure unit (200), limit switches (510a, 510b) that detect the position of the linear actuator, a control unit (700) that controls the above sensors, and an alarm actuator (710).

[0040] The detection sensor (170) is a sensor that detects whether the syringe is correctly attached to the device base. The detection method is important to detect whether the syringe is correctly attached. If the detection sensor (170) only detects the presence of the syringe, it may misrecognize due to differences in the size or length of the syringe. In addition, there is a possibility that the pressurizing unit (200) may operate too early when the movable mounting base (160) has not yet moved and the syringe is not correctly attached.

[0041] Therefore, it is desirable to provide at least two, and preferably three or more, detection sensors (170). The first detection sensor is a sensor that detects the fastening of the movable mount, the second detection sensor is a sensor that detects the fastening error caused by the thickness of the finger hook of the syringe, and the third detection sensor is a sensor that determines whether or not a syringe is attached when the button is pressed and the movable mount is fastened with no syringe attached.

[0042] Therefore, it is preferable that when all the three detection sensors (170) are satisfied, the movement of the pressure member (200) is started.

[0043] The load cell 220 is a sensor provided in the pressure unit 200 for applying a constant pressure, and detects whether an initial setting value is maintained or when the pressure is changed.

[0044] The limit switch is a switch that limits the movement distance of the actuator, and if the hemodialysis time ends before the actuator reaches the position of the limit switch (510a), the actuator returns to the origin (510b) of the limit switch. Also, if the actuator reaches the limit switch (510a) and hemodialysis continues, an alarm is generated.

[0045] In this manner, when the automatic injection device detects that the syringe is tightly fastened by the detection sensor (170), the pressure applying section moves toward the syringe, and when the load cell touches the thumb rest of the syringe, it presses the syringe push rod with a constant preset pressure and waits until hemodialysis begins.

[0046] Then, when a signal is generated from the control unit, the driving motor (610) moves the pressure unit (200) toward the syringe, and when the pressure unit (200) touches the thumb rest of the syringe, it presses the syringe push rod with a certain pressure. At this time, the driving motor (610) and the linear actuator can push out the injection amount of the syringe at a constant amount according to the set value, and the injection pressure of the syringe can be monitored.

[0047] Meanwhile, an alarm actuator may be set to trigger an alarm when the syringe injection pressure exceeds a set range, and also to trigger an alarm when the syringe has reached the end of a set volume and time.

[0048] Therefore, the syringe pressure can be automatically adjusted accurately, reducing errors in drug injection caused by manual attachment. In addition, the detection sensor (170) can check whether the syringe barrel or finger rest is securely fastened to the device, eliminating the need for separate checks when attaching the syringe. Furthermore, when the load cell (220) comes into contact with the thumb rest of the syringe at a certain pressure (before dialysis begins), it automatically stops, eliminating the need for manual fine adjustments to align the pressure unit and the thumb rest.

[0049] In addition, the load cell can monitor the pressure of the syringe in real time, so that the blood line, dialysis filter, and syringe can be monitored for clogging. In other words, once a syringe is attached to the automatic injection device, all subsequent injection procedures are performed automatically. The operation of the automatic injection device according to the embodiment of the present invention will be described below with reference to Figure 7.

[0050] When a user wants to insert a syringe into the automatic injection device to inject a liquid medicine, the finger loop of the syringe filled with the liquid medicine is first inserted into the mounting groove (150) between the fixed mounting base (110) and the movable mounting base (160) of the automatic injection device. When the syringe is inserted, it presses the button (120) formed on the outer surface of the fixed mounting base (110). When the button (120) is pressed, it moves downward, making the movable mounting base (160) movable.

[0051] The first pin (165) of the movable mount (160) moves toward the second pin (420) due to the contraction of the return spring (430) provided between the first pin (165) and the second pin (420), and as a result, the movable mount (160) moves toward the fixed mount (110). Therefore, the finger hook located between the fixed mount (110) and the movable mount (160) is fixed by pressure to the mounting groove (150) between the fixed mount (110) and the movable mount (160).

[0052] Meanwhile, the detection sensor (170) detects whether the syringe is attached, and when the attachment is complete, the pressure unit moves in response to a signal, and comes into contact with the thumb rest with a certain pressure. When hemodialysis begins, the pressure unit applies pressure directly to the push rod through the thumb rest of the syringe. At this time, the operation of the pressure unit (200) is controlled so that the required injection solution is injected according to the injection volume set by the user.

[0053] The pressure applying unit (200) applies pressure to the syringe while moving linearly by a linear actuator, and the operating distance of the actuator is determined by limit switches (510a, 510b) so that the actuator operates only within a determined range.

[0054] The features, structures, effects, etc. shown in each of the above-described embodiments can be combined or modified in other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention. [Explanation of symbols]

[0055] 100: Mounting part 110: Fixed mount 120: Button 130: Button Wing 140: Storage Groove 150: Mounting groove 160: Mobile mounting stand 161: Receiving part 163: Close contact area 165: 1st pin 167: Buttonhole 170: Detection sensor 200: Pressurizing section 210: Pressurizing unit 220: Load cell 240: Linear guide 250: Linear actuator 300: Cover 310: Opening groove 320: Return spring groove 330: Button mounting groove 400: 1st Plate 410: Sliding Home 420: 2nd pin 430: Return spring 500: 2nd plate 510a: Limit switch 510b: Limit switch 520: Sensing Target 600: Drive unit 610: Drive motor 620: Drive shaft 630: Drive shaft casing 700: Control section 710: Alarm actuator

Claims

1. The device automatically mounts a syringe and injects a syringe liquid, and includes a mounting unit (100) including a fixed mounting base (110) on which the barrel of the syringe is mounted, and a movable mounting base (160) for clamping and fixing the finger hook of the syringe between the fixed mounting base; A pressure applying part (200) for applying pressure to the thumb rest of the push rod of the syringe attached to the mounting part (100); and A driving unit (600) for moving the pressure unit (200), The bottom surface of the fixed mounting base (110) is equipped with a button (120) for switching the movable mounting base (160) to a movable state, and when the syringe is placed in the mounting groove (150) between the fixed mounting base (110) and the movable mounting base (160) so that the finger hook of the syringe is positioned, the button (120) is pressed, causing the movable mounting base (160) to move toward the fixed mounting base (110) and secure the syringe.

2. 2. The automatic injection device of claim 1, further comprising a detection sensor (170) for detecting when the syringe is seated in the mount.

3. 3. The automatic injection device according to claim 2, wherein the pressurizing section (200) includes a pressurizing unit (210) and a load cell installed inside the pressurizing unit (210) for sensing the applied pressure.

4. 2. The automatic injection device of claim 1, wherein the movable mount (160) moves toward the fixed mount (110) by the restoring force of a return spring (430) when the button (120) is pressed.

5. The automatic injection device of claim 4, further comprising a cover portion (300) that covers the drive portion (600), providing a surface on which the fixed mounting base (110) is installed, and having a return spring groove (320) for seating the return spring (430) and a button mounting groove (330) for mounting the button (120).

6. The automatic injection device of claim 4, further comprising a cover portion (300) that covers the drive portion (600), providing a surface on which the fixed mounting base (110) is installed, having a return spring groove (320) for accommodating the return spring (430), and a button mounting groove (330) for mounting the button (120).

7. The automatic injection device of claim 3, wherein the fixed mount (110) further comprises a receiving groove (140) in which the receiving portion (161) is received.

8. 5. The automatic injection device of claim 4, wherein the movable mounting base (160) has a first pin (165) protruding downward, the cover portion (300) has a second pin (420) protruding upward, and each end of the first pin (165) and the second pin (420) is connected to both ends of the return spring seated in the return spring groove.

9. 5. The automatic injection device according to claim 4, wherein the pressurizing unit (200) is connected to a drive shaft (620) of the driving unit (600) and a linear actuator (250) to perform linear motion.

10. The automatic injection device of claim 5, further comprising: a first plate installed on a bottom surface of the cover portion; and a second plate provided at a predetermined distance from the first plate to provide a surface on which a drive shaft casing (630) for protecting the drive shaft (620) is installed, the second plate having limit switches (510a, 510b) for specifying the range of movement of the linear actuator, and a sensing target (520) recognized by the limit switches (510a, 510b) installed on the outer surface of the linear actuator.

11. The automatic injection device of claim 10, further comprising a controller (700) that receives signals from the detection sensor (170), the limit switches (510a, 510b) and the load cell and controls the drive motor (610).

12. The automatic injection device of claim 11, wherein the detection sensor (170) comprises at least two selected from the group consisting of a first detection sensor (170a) that detects the fastening of the movable mounting base, a second detection sensor (170b) that detects a fastening error corresponding to a thickness of the finger hook portion of the syringe, and a third detection sensor (170c) that detects whether or not the movable mounting base (160) has moved.

13. A hemodialysis machine comprising the automatic injection device of any one of claims 1 to 12.

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