Liquid stop device and infusion pump

Abstract

The present invention discloses a liquid-stopping device, comprising a liquid-stopping slider, a fixed platform, an elastic element, a self-locking mechanism and a base. The liquid-stopping slider is arranged on the base so as to slide along a first direction. The liquid-stopping slider comprises a first side and a second side arranged opposite to each other in the first direction. The two ends of the elastic element are respectively connected to the base and the first side. The self-locking mechanism is connected to the second side and is used to drive the liquid-stopping slider to slide in the first direction. When the self-locking mechanism is in the self-locking state, the liquid-stopping slider and the fixed platform are spaced apart in the first direction to form a channel for the infusion tube to pass through. When the self-locking mechanism is in the self-locking state, the liquid-stopping slider is positioned, and the operator can place the infusion tube in the channel. When the self-locking mechanism is unlocked, the liquid-stopping slider is pressed against the fixed platform under the pressure of the elastic element to achieve the purpose of stopping the liquid. This liquid-stopping device has a reasonable design, a simple structure, is easy to maintain, and has a low cost. It can be applied to infusion pumps that require self-locking and liquid-stopping functions.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a liquid stopping device and an infusion pump. Background Art

[0002] Current clinical medicine has transcended traditional manual infusion methods, enabling automated infusion using automated infusion devices based on infusion pumps. Typically, infusion pumps are equipped with a stopper to stop the flow of medication within the infusion tubing under specific circumstances. While various types of stoppers exist on the market, they often suffer from complex structures, high manufacturing costs, and difficulties in maintenance and installation. Summary of the Invention

[0003] In response to the above-mentioned technical problems, the present application provides a liquid-stopping device and an infusion pump with a simple structure, easy maintenance and low cost.

[0004] On the one hand, the technical solution provided by the embodiment of the present application is: a liquid-stop device, including a liquid-stop slider, a fixed platform, an elastic element, a self-locking mechanism and a base, the liquid-stop slider is slidably arranged on the base along a first direction, the liquid-stop slider includes a first side and a second side relatively arranged in the first direction, the two ends of the elastic element are respectively connected to the base and the first side, the self-locking mechanism is connected to the second side, and is used to drive the liquid-stop slider to slide in the first direction, when the self-locking mechanism is in the self-locking state, the liquid-stop slider and the fixed platform are spaced apart in the first direction to form a channel for the infusion tube to pass through.

[0005] Preferably, the self-locking mechanism includes a toggle rod and a connecting rod, the toggle rod is rotatably set on the base through a first rotating shaft, the connecting rod is rotationally connected to the toggle rod through a second rotating shaft, and the connecting rod is rotationally connected to the liquid-stop slider through a third rotating shaft. When the self-locking mechanism is in a self-locking state, the first rotating shaft, the second rotating shaft and the third rotating shaft are located on the same straight line, and the straight line is parallel to the first direction.

[0006] Preferably, the toggle rod includes a first support rod and a second support rod connected to each other, an angle is formed between the first support rod and the second support rod, and an end of the second support rod away from the first support rod is rotatably connected to the connecting rod through the second rotation axis.

[0007] Preferably, the liquid-stopping device further comprises a pump door, which is rotatably connected to the base via a fixed shaft, and the pump door is provided with a contact arm that contacts the self-locking mechanism and the liquid-stopping slider.

[0008] Preferably, the contact arm includes a first contact arm and a second contact arm. When the pump door is rotated to the closed position, the first contact arm contacts the toggle rod to release the self-locking state of the self-locking mechanism; the second contact arm is used to abut against the liquid-stop slider, and when the liquid-stop slider abuts against the second contact arm, the distance between the liquid-stop slider and the fixed platform is smaller than the diameter of the infusion tube.

[0009] Preferably, the liquid-stop slider includes an inclined surface, and after the pump door rotates to the closed position, the second contact arm contacts the inclined surface.

[0010] Preferably, the inclined surface is inclined in a direction from the first side to the second side and in a direction away from the second contact arm.

[0011] Preferably, a sliding channel is provided on the base, the sliding channel extends along the first direction, and the width of the sliding channel is adapted to the width of the liquid-stop sliding block.

[0012] Preferably, the elastic element is a spring.

[0013] On the other hand, an embodiment of the present application further provides an infusion pump, which includes the liquid stopping device as described above.

[0014] The beneficial effects of the present application are as follows: the self-locking mechanism and the elastic element cooperate to drive the liquid-stop slider to slide in a first direction, so that the distance between the second side of the liquid-stop slider and the fixed platform changes, thereby realizing the opening or closing of the channel. When the self-locking mechanism is in the self-locking state, the liquid-stop slider is positioned, the channel is open, and the operator can place the infusion tube in the channel. When the self-locking mechanism is unlocked, the liquid-stop slider is pressed against the fixed platform under the pressure of the elastic element, and the channel is closed. At this time, the purpose of timely stopping the liquid and preventing the backflow of the liquid in the infusion tube can be achieved. This liquid-stop device has a reasonable design, a simple structure, is easy to maintain, and is low in cost. It can be applied to infusion pumps that require self-locking and liquid-stop functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] in:

[0017] Figure 1 Schematic diagram of the overall structure of the liquid-stopping device in one embodiment of the present application;

[0018] Figure 2 Schematic diagram of a liquid-stopping device without a pump door in a natural state in one embodiment of the present application;

[0019] Figure 3 Schematic diagram of a liquid-stopping device in a self-locking state in an embodiment of the present application;

[0020] Figure 4 This is a schematic diagram of the liquid stopping device in one embodiment of the present application when the infusion tube is placed into the infusion tube channel;

[0021] Figure 5 A schematic diagram of the liquid-stopping device in one embodiment of the present application when the pump door is about to close;

[0022] Figure 6 A schematic diagram of the liquid-stopping device in one embodiment of the present application being in a state where the pump door is closed and the travel of the liquid-stopping device is restricted by the pump door;

[0023] Figure 7 A schematic diagram of the liquid-stopping device in one embodiment of the present application in a liquid-stopping state after the pump door is opened;

[0024] Explanation of the accompanying drawings: liquid stop device 100, liquid stop slider 110, fixed platform 120, elastic element 130, self-locking mechanism 140, base 150, toggle rod 141, connecting rod 142, first support rod 1411, second support rod 1412, handle 1413, first rotating axis 143, second rotating axis 144, third rotating axis 145, channel 160, inclined surface 111, pump door 170, fixed axis 180, first contact arm 171, second contact arm 172, first contact point 173, second contact point 174. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] As attached Figure 1 The liquid-stopping device 100 of the illustrated embodiment includes a liquid-stopping slider 110 , a fixing platform 120 , an elastic element 130 , a self-locking mechanism 140 , and a base 150 .

[0027] The liquid-stop slider 110 is cubically shaped and slidably mounted on a base 150 in a first direction. The base 150 is provided with a sliding channel extending in the first direction, the width of which matches the width of the liquid-stop slider 110. The liquid-stop slider 110 includes a first side and a second side disposed opposite each other in the first direction. One end of an elastic element 130 is connected to the base 150, while the other end of the elastic element 130 is connected to the first side of the liquid-stop slider 110. A self-locking mechanism 140 is rotatably mounted on the base 150 via a first rotation axis 143. The self-locking mechanism 140 is connected to the second side of the liquid-stop slider 110 and can rotate about the first rotation axis 143, driving the liquid-stop slider 110 to slide in the first direction. When the self-locking mechanism 140 reaches the self-locking position, a channel 160 is formed between the liquid-stop slider 110 and the fixed platform 120 for the infusion tube to pass through. The operator can place the infusion tube in the channel 160.

[0028] As attached Figure 2 As shown, when the liquid-stop device 100 is in a natural state or an unlocked state, the elastic force provided by the elastic element 130 can push the liquid-stop slider 110 to slide upward, so that the second side of the liquid-stop slider 110 contacts the fixed platform 120, and the channel 160 is in a tightly closed state. At this time, the infusion tube is in a liquid-stop state.

[0029] The liquid-stop device 100, through the interaction of the self-locking mechanism 140 and the elastic element 130, drives the liquid-stop slider 110 to slide in a first direction, causing the spacing between the second side of the liquid-stop slider 110 and the fixed platform 120 to change, thereby opening or closing the channel 160. When the self-locking mechanism is in the self-locking state, the liquid-stop slider is positioned, the channel is open, and the operator can place the infusion tube in the channel. When the self-locking mechanism is unlocked, the liquid-stop slider, under the pressure of the elastic element, presses against the fixed platform, closing the channel, thus achieving the purpose of timely stopping the liquid in the infusion tube and preventing backflow. This liquid-stop device has a reasonable design, simple structure, easy maintenance, and low cost, and can be applied to infusion pumps that require both self-locking and liquid-stopping functions.

[0030] In one embodiment, the fixed platform 120 is mounted on the base 150. The fixed platform 120 can also be mounted within the housing of the liquid-stopping device 100. The second side of the liquid-stopping slider 110 is aligned with the surface of the fixed platform 120. A channel 160 for accommodating the infusion tube is formed between the second side of the liquid-stopping slider 110 and the fixed platform 120. In another embodiment, the second side of the liquid-stopping slider 110 and the fixed platform 120 can be configured with a non-smooth concave-convex structure to increase friction and enhance the liquid-stopping effect when the two are clamped together. The diameter of the channel 160 is slightly larger than the outer diameter of the infusion tube.

[0031] Of course, the elastic element 130 may be a spring, a torsion spring or other objects that can release elastic force, and there may be multiple elastic elements 130 .

[0032] Combined with attachment Figure 1-2 In one embodiment, the self-locking mechanism 140 includes a toggle lever 141 and a connecting rod 142. The toggle lever 141 is rotatably mounted on the base 150 via a first rotation axis 143. The toggle lever 141 is rotatable about the first rotation axis 143. The toggle lever 141 includes a first support rod 1411 and a second support rod 1412, which are connected to each other. The first support rod 1411 and the second support rod 1412 form an angle. In one embodiment, the angle between the first support rod 1411 and the second support rod 1412 is 90°. The first support rod 1411 may also include a handle 1413. One end of the connecting rod 142 is rotatably connected to the second support rod 1412 via a second rotation axis 144. The other end of the connecting rod 142 is rotatably connected to the liquid-stop slider 110 via a third rotation axis 145.

[0033] In other embodiments, the angle between the first support rod 1411 and the second support rod 1412 can be adjusted to different angles according to factors such as the installation position and the force.

[0034] As attached Figure 2 As shown, when the liquid-stopping device 100 is in a natural state or an unlocked state, there is a certain angle between the second support rod 1412 of the toggle rod and the connecting rod 142, and the two are not in a straight line. At this time, the elastic element 130 applies an upward elastic force to the liquid-stopping slider 110, so that the second side of the liquid-stopping slider 110 contacts the fixed platform 120, and the channel 160 is in a tightly closed state. At this time, the infusion tube is in a liquid-stopping state.

[0035] As attached Figure 3 As shown, when the liquid-stopping device 100 is in a self-locking state, that is, the operator manually pushes the handle 1413 upwards, and the lever 141 rotates around the first rotation axis 143, when the second support rod 1412 of the lever rotates to form a straight line with the connecting rod 142, the first rotation axis 143, the second rotation axis 144 and the third rotation axis 145 are located on the same straight line, and the straight line is parallel to the first direction, and the liquid-stopping device 100 is in a self-locking state. The liquid-stopping slider 110 slides downward under the downward force of the connecting rod 142, and the distance between the second side of the liquid-stopping slider 110 and the fixed platform 120 is locked. When the liquid-stopping device 100 is in a self-locking state, the operator can put the infusion tube into the channel 160, as shown in the attached figure. Figure 4 shown.

[0036] As attached Figure 5-6In one embodiment shown, the liquid-stopping device 100 of the infusion pump further includes a pump door 170, which is rotatably connected to the base 150 via a fixed shaft 180. The pump door 170 is provided with contact arms that contact the self-locking mechanism 140 and the liquid-stopping slider 110. The contact arms include a first contact arm 171 and a second contact arm 172. When the self-locking mechanism 140 is in the self-locking position, the operator installs the infusion tube in the channel 160 and closes the pump door 170. When the pump door 170 rotates about the fixed shaft 180 to the closed position, the first contact arm 171 of the pump door 170 contacts the toggle lever 141 to form a first contact point 173, causing the toggle lever 141 to generate a torque that unlocks the self-locking mechanism 140, thereby releasing the self-locking state of the self-locking mechanism. The liquid-stop slider 110 slides upward for a short distance under the action of the elastic element 130. The liquid-stop slider 110 slides upward until it abuts against the second contact arm 172 of the pump door 170. The liquid-stop slider 110 is blocked by the force and its stroke is limited, and it stops sliding upward. At this time, the distance between the liquid-stop slider 110 and the fixed platform 120 is smaller than the diameter of the infusion tube. The infusion tube in the channel 160 is not completely clamped and is in a half-open and half-closed state. Liquid can flow through the infusion tube. This process is that after the pump door 170 is closed, the self-locking mechanism 140 is unlocked, and the infusion pump starts infusion work.

[0037] As attached Figure 6 In one embodiment shown, the liquid-stop slider 110 includes an inclined surface 111. When the pump door 170 rotates to the closed position, the second contact arm 172 contacts the inclined surface 111. This contact point is the second contact point 174. The inclined surface 111 is inclined in a direction away from the second contact arm in a direction from the first side to the second side.

[0038] Of course, inclined surface 111 can be adjusted to different angles to accommodate different infusion speeds. Inclined surface 111 can be protruding from the side of liquid-stop slider 110 where it mates with pump door 170. This inclined surface 111 is removable, replaceable, and adjustable in angle for easy maintenance. Of course, inclined surface 111 can also be integrally formed with liquid-stop slider 110 to save costs.

[0039] Combined with attachment Figure 6-7 When the infusion pump completes operation, pump door 170 is opened. As pump door 170 rotates about fixed axis 180 to the open position, second contact point 174, where second contact arm 172 of pump door 170 contacts inclined surface 111 of liquid-stop slider 110, continuously moves rightward, and liquid-stop slider 110 slides upward under the force of elastic element 130. When pump door 170 is no longer in contact with liquid-stop slider 110, pump door 170 is completely open, liquid-stop slider 110 contacts fixed platform 120, and the infusion tube is clamped, achieving the purpose of stopping the flow of fluid by opening pump door 170.

[0040] After the infusion tube is clamped, if the infusion pump is subsequently needed, the pump door 170 is closed. The second contact arm 172 of the pump door 170 first contacts the inclined surface 111 of the liquid-stop slider 110, causing the liquid-stop slider 110 to move downward. When the pump door 170 is completely closed, the liquid-stop slider 110 is restricted in its travel and no longer moves downward. At this time, the infusion tube in the channel 160 is in a semi-open and semi-closed operating state, allowing the liquid in the infusion tube to flow freely. This process achieves the goal of closing the pump door 170, opening the channel 160 to the travel-limited position, and restoring the infusion tube to its semi-open and semi-closed operating state.

[0041] In the above embodiment, the self-locking mechanism and the elastic element cooperate to drive the liquid-stop slider to slide in a first direction, thereby varying the spacing between the second side of the liquid-stop slider and the fixed platform to open or close the channel. When the self-locking mechanism is in the self-locking state, the liquid-stop slider is positioned, the channel is open, and the operator can place the infusion tube in the channel. When the self-locking mechanism is unlocked, the liquid-stop slider, under the pressure of the elastic element, is pressed against the fixed platform, closing the channel. This achieves the purpose of timely stopping the liquid and preventing backflow of the liquid in the infusion tube. This liquid-stop device has a reasonable design, a simple structure, easy maintenance, and low cost, and can be applied to infusion pumps that require both self-locking and liquid-stopping functions.

[0042] The present invention also proposes an infusion pump, which includes the above-mentioned liquid-stopping device 100. The specific structure of the liquid-stopping device 100 refers to the above-mentioned embodiment. Since this infusion pump adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0043] What has been disclosed above are merely preferred embodiments of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Under the concept of this application, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the present application as described above. For the sake of simplicity, they are not provided in detail. Therefore, equivalent changes made in accordance with the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A liquid stopping device, characterized in that: It includes: Liquid-stop slider, fixed platform, elastic element, self-locking mechanism and base, The liquid-stop slider is slidably arranged on the base along a first direction, the liquid-stop slider includes a first side and a second side arranged opposite to each other in the first direction, the two ends of the elastic element are respectively connected to the base and the first side, the self-locking mechanism is connected to the second side and is used to drive the liquid-stop slider to slide in the first direction, when the self-locking mechanism is in the self-locking state, the liquid-stop slider and the fixed platform are spaced apart in the first direction to form a channel for the infusion tube to pass through; the second side of the liquid-stop slider is kept level with the surface of the fixed platform; The self-locking mechanism includes a toggle rod and a connecting rod. The toggle lever is rotatably mounted on the base via a first rotation axis, the connecting rod is rotatably connected to the toggle lever via a second rotation axis, and the connecting rod is rotatably connected to the liquid-stop slider via a third rotation axis. When the self-locking mechanism is in a self-locking state, the first rotation axis, the second rotation axis, and the third rotation axis are located on the same straight line, and the straight line is parallel to the first direction. The toggle rod includes a first support rod and a second support rod connected to each other, an angle is formed between the first support rod and the second support rod, and an end of the second support rod away from the first support rod is rotatably connected to the connecting rod through the second rotation axis.

2. The liquid stopping device according to claim 1, characterized in that: The liquid-stopping device further comprises a pump door, which is rotatably connected to the base via a fixed shaft, and the pump door is provided with a contact arm which contacts the self-locking mechanism and the liquid-stopping sliding block.

3. The liquid stopping device according to claim 2, characterized in that: The contact arm includes a first contact arm and a second contact arm. When the pump door rotates to the closed position, the first contact arm contacts the toggle rod to release the self-locking state of the self-locking mechanism; the second contact arm is used to abut against the liquid-stop slider, and when the liquid-stop slider abuts against the second contact arm, the distance between the liquid-stop slider and the fixed platform is smaller than the diameter of the infusion tube.

4. The liquid stopping device according to claim 3, characterized in that: The liquid-stop slider includes an inclined surface, and after the pump door rotates to the closed position, the second contact arm contacts the inclined surface.

5. The liquid stopping device according to claim 4, characterized in that: The inclined surface is inclined in a direction away from the second contact arm in a direction from the first side to the second side.

6. The liquid stopping device according to claim 1, characterized in that: The base is provided with a sliding channel, which extends along the first direction, and the width of the sliding channel is adapted to the width of the liquid-stop sliding block.

7. The liquid stopping device according to claim 6, characterized in that: The elastic element is a spring.

8. An infusion pump, characterized in that: The liquid-stopping device comprises the liquid-stopping device according to any one of claims 1 to 7.

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