Liquid stop device and infusion pump

Abstract

The application discloses a liquid stopping device, which comprises a liquid stopping sliding block, a fixed platform, an elastic element, a first supporting rod and a base. The liquid stopping sliding block is arranged on the base and can slide in a first direction. The liquid stopping sliding block comprises a first side and a second side which are oppositely arranged in the first direction. A guide rail is arranged on the liquid stopping sliding block. The two ends of the elastic element are connected to the base and the first side respectively. One end of the first supporting rod is rotatably connected to the base, and the other end is slidably connected to the guide rail. When the first supporting rod rotates, the other end of the first supporting rod slides along the guide rail to drive the liquid stopping sliding block to move in the first direction. When the first supporting rod rotates to be parallel to the first direction, the liquid stopping sliding block and the fixed platform are arranged in the first direction and are spaced apart to form a channel for a transfusion tube. An operator can place the transfusion tube in the channel. When the first supporting rod is away from the position parallel to the first direction, the channel is closed, and the purpose of stopping liquid is achieved. The device has the advantages of reasonable design, simple structure, convenient maintenance and low cost.

Description

TECHNICAL FIELD

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

[0002] In the current clinical medical field, the traditional manual infusion method has been broken through, and automatic infusion is realized by using an automatic infusion device with an infusion pump as the main body. In general, a liquid stopping device needs to be equipped in the infusion pump to realize the function of stopping the flow of liquid in the infusion tube under certain conditions. There are various types of liquid stopping devices on the market, although they have the function of stopping liquid, but they generally have problems such as complex structure, high manufacturing cost, difficult maintenance and installation, etc. SUMMARY

[0003] The present application provides a liquid stopping device and infusion pump with simple structure, convenient maintenance and low cost to solve the above technical problems.

[0004] In one aspect, the technical scheme provided by the present application is: a liquid stopping device, comprising a liquid stopping slider, a fixed platform, an elastic element, a first supporting rod and a base, the liquid stopping slider is slidingly arranged on the base in a first direction, the liquid stopping slider comprises a first side and a second side arranged opposite in the first direction, a guide rail is arranged on the liquid stopping slider, two ends of the elastic element are connected to the base and the first side respectively, one end of the first supporting rod is rotatably connected to the base, the other end of the first supporting rod is slidingly connected to the guide rail, when the first supporting rod rotates relative to the base, the other end of the first supporting rod slides along the guide rail to drive the liquid stopping slider to move in the first direction, when the first supporting rod rotates to be parallel to the first direction, the liquid stopping slider and the fixed platform are arranged in the first direction with a spacing to form a channel for the infusion tube to pass through.

[0005] Preferably, the liquid stopping device further comprises a second supporting rod, the second supporting rod is connected to one end of the first supporting rod and is used to drive the first supporting rod to rotate.

[0006] Preferably, the second supporting rod and the first supporting rod have an included angle therebetween.

[0007] Preferably, the liquid stopping device further comprises a pump door, the pump door is rotatably connected to the base through a fixed shaft, the pump door is provided with a contact end in contact with the second supporting rod and the liquid stopping slider.

[0008] Preferably, the contact end comprises a first contact end and a second contact end, the first contact end is in contact with the first supporting rod or the second supporting rod when the pump door rotates to the closed position, so as to make the first supporting rod deviate from the position parallel to the first direction; the second contact end is used to abut against the liquid-stopping slider, and the distance between the liquid-stopping slider and the fixed platform is less than the diameter of the infusion tube when the liquid-stopping slider abuts against the second contact end.

[0009] Preferably, the liquid-stopping slider comprises an inclined surface, the second contact end is in contact with the inclined surface after the pump door rotates to the closed position.

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

[0011] Preferably, the guide rail is a groove opened on the liquid-stopping slider, the other end of the first supporting rod is provided with a roller, and the roller is arranged to roll in the guide rail.

[0012] Preferably, the guide rail is an arc-shaped guide rail, and the arc-shaped guide rail takes the rotation center of the first supporting rod as the center.

[0013] In another aspect, the embodiment of the present application further provides an infusion pump comprising the liquid-stopping device as described above.

[0014] The beneficial effects of the present application are as follows: when the first supporting rod rotates relative to the base, one end of the first supporting rod slides along the guide rail to drive the liquid-stopping slider to move in the first direction, so as to change the distance between the second side of the liquid-stopping slider and the fixed platform, to realize the opening or closing of the channel; when the first supporting rod rotates to be parallel to the first direction, the liquid-stopping slider is positioned, the channel is opened, and the operator can place the infusion tube in the channel; when the first supporting rod deviates from the position parallel to the first direction, the liquid-stopping slider is pressed against the fixed platform under the pressure of the elastic element, the channel is closed, and the purpose of timely stopping liquid to prevent the backflow of liquid in the infusion tube can be achieved. The liquid-stopping device has reasonable design, simple structure, convenient maintenance, and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0016] In the drawings:

[0017] Figure 1Fig. 1 is a schematic diagram of the overall structure of the liquid stopping device in an embodiment of the present application;

[0018] Figure 2 Fig. 2 is a schematic diagram of the liquid stopping device in an embodiment of the present application in a natural state without a pump door;

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

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

[0021] Figure 5 Fig. 5 is a schematic diagram of the liquid stopping device in an embodiment of the present application when the pump door is about to close;

[0022] Figure 6 Fig. 6 is a schematic diagram of the liquid stopping device in an embodiment of the present application after the pump door is closed, and the liquid stopping device is limited in stroke by the pump door;

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

[0024] Fig. 8 is a schematic diagram of the liquid stopping device in an embodiment of the present application, in which the reference signs are as follows: liquid stopping device 100, liquid stopping slider 110, fixed platform 120, elastic element 130, first supporting rod 140, base 150, guide rail 142, second supporting rod 141, handle 1411, roller 1412, first rotating shaft 143, channel 160, inclined surface 111, pump door 170, fixed shaft 180, first contact end 171, second contact end 172, first contact point 173, and second contact point 174. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0026] Fig. 1 is a schematic diagram of the overall structure of the liquid stopping device in an embodiment of the present application; Figure 1 As shown in an embodiment of the liquid stopping device 100, the liquid stopping device 100 includes a liquid stopping slider 110, a fixed platform 120, an elastic element 130, a first supporting rod 140, and a base 150.

[0027] The stop block 110 is cubically shaped and slidably mounted on a base 150 along a first direction. The base 150 is provided with a sliding channel extending along the first direction, the width of which matches the width of the stop block 110. The stop block 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 stop block 110. One end of a first support rod 140 is mounted on the base 150 via a first rotation axis 143. A guide rail 142 is provided on the stop block 110. The first support rod 140 can rotate about the first rotation axis 143. During rotation, the other end of the first support rod 140 slides along the guide rail 142, thereby driving the stop block 110 in the first direction. When the first support rod 140 rotates to be parallel to the first direction, the liquid-stop slider 110 is positioned, and the liquid-stop slider 110 and the fixed platform 120 are spaced apart in the first direction to form a channel 160 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-stopping device 100 is in a natural state or unlocked state, that is, the first support rod 140 does not apply any force, the elastic element 130 applies an upward elastic force to the liquid-stopping slider 110, so that the second side surface 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.

[0029] When the liquid-stopping device 100 rotates relative to the base via the first support rod, one end of the first support rod slides along the guide rail, driving the liquid-stopping slider to move in the first direction, thereby changing the distance between the second side of the liquid-stopping slider and the fixed platform to open or close the channel. When the first support rod rotates parallel to the first direction, the liquid-stopping slider is positioned, the channel is open, and the operator can place the infusion tube in the channel. When the first support rod moves away from the position parallel to the first direction, the liquid-stopping slider, under the pressure of the elastic element, presses against the fixed platform, closing the channel. This achieves the purpose of timely stopping the liquid and preventing the backflow of liquid in the infusion tube. This liquid-stopping device has a reasonable design, a simple structure, is easy to maintain, and is low in cost.

[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 surface 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 surface of the liquid-stopping slider 110 and the fixed platform 120. In another embodiment, the second side surface of the liquid-stopping slider 110 and the surface of 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 can be a spring, a torsion spring or other objects that can release elastic force. The elastic element 130 can also be multiple.

[0032] The accompanying drawings are referred to in Figures 1-2 In one embodiment, the first supporting rod 140 is arranged on the base 150 through the first rotating shaft 143, and the guide rail 142 is arranged on one side of the liquid-stopping slider 110. When the first supporting rod 140 rotates, one end of the first supporting rod 140 moves along the guide rail 142 and exerts force on the guide rail 142, thereby driving the liquid-stopping slider 110 to slide. When the first supporting rod 140 rotates to be parallel to the first direction, the first supporting rod 140 will no longer rotate, and the liquid-stopping slider 110 is positioned, thereby realizing the self-locking function.

[0033] In another embodiment, the liquid-stopping device 100 further comprises a second supporting rod 141 connected to one end of the first supporting rod 140 for driving the first supporting rod 140 to rotate. The second supporting rod 141 and the first supporting rod 140 have an included angle. In one example, the included angle between the second supporting rod 141 and the first supporting rod 140 is 90°. One end of the first supporting rod 140 away from the second supporting rod 141 moves along the guide rail 142. When the first supporting rod 140 rotates to be parallel to the first direction, the liquid-stopping device 100 is in the self-locking state, the liquid-stopping slider 110 is positioned, and the channel 160 is open, so that the operator can place the infusion tube in the channel.

[0034] In other embodiments, the included angle between the first supporting rod 140 and the second supporting rod 141 can be adjusted to different angles according to the setting position, force and other factors.

[0035] In another embodiment, the first supporting rod 140 is provided with a roller 1412 at one end away from the second supporting rod 141, and the roller 1412 is arranged to roll in the guide rail 142. The second supporting rod 141 can further comprise a handle 1411 at one end away from the first supporting rod 140. When the handle 1411 is forced, the first supporting rod 140 can rotate around the first rotating shaft 143, so that the roller 1412 on the first supporting rod 140 reciprocates along the guide rail 142.

[0036] In one example, the guide rail 142 is a groove opened on the liquid-stopping slider 110, and the guide rail 142 is an arc-shaped guide rail with the center of rotation of the first supporting rod 140 as the center. The roller 1412 on the first supporting rod 140 can freely slide on the guide rail 142. This structure makes the operation more labor-saving and stable through the cooperation of the roller 1412 and the guide rail 142, and occupies less space.

[0037] The accompanying drawings are referred to in Figure 2As shown, when the liquid-stopping device 100 is in a natural state or unlocked state, that is, when the first support rod 140 does not apply any force, the first support rod 140 leaves a position parallel to the first direction. At this time, the elastic element 130 applies an upward elastic force to the liquid-stopping slider 110, causing the second side of the liquid-stopping slider 110 to contact 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.

[0038] Combined with attachment Figure 3 As shown, the operator pushes the handle 1411 downward, the first support rod 140 rotates around the first rotation axis 143, and the roller 1412 on the first support rod 140 moves to the side of the guide rail 142 close to the center of the slider. The roller 1412 applies a downward force to the guide rail 142, causing the liquid-stop slider 110 to slide downward. When the first support rod 140 is parallel to the first direction, the liquid-stop device 100 is in a self-locking state. At this time, the distance between the second side surface of the liquid-stop slider 110 and the fixed platform 120 is locked, and the operator can put the infusion tube into the infusion tube channel 160, as shown in the attached figure. Figure 4 shown.

[0039] As attached Figures 5-6 In one embodiment shown, the liquid-stopping device 100 of the infusion pump is provided with a pump door 170 , which is rotatably connected to the base 150 via a fixed shaft 180 , and the pump door 170 is provided with a contact end that contacts the second support rod 141 and the liquid-stopping slider 110 . The contact end includes a first contact end 171 and a second contact end 172. When the pump door 170 is rotated to the closed position, the first contact end 171 of the pump door 170 contacts the second support rod 141 to form a first contact point 173. Of course, the first contact end 171 of the pump door 170 can also contact the first support rod 140 to make the first support rod 140 leave the position parallel to the first direction. At this time, the liquid stopping device 100 is released from the self-locking state, and the second contact end 172 of the pump door 170 is used to abut against the liquid stopping slider 110. When the liquid stopping slider 110 abuts against the second contact end 172, the distance between the liquid stopping slider 110 and the fixed platform 120 is smaller than the diameter of the infusion tube. At this time, the infusion tube in the channel 160 is not completely clamped, but is in a half-open and half-closed state, and liquid can flow through the infusion tube. This process is that after the pump door 170 is closed, the stroke of the liquid stopping slider 110 is limited, and the infusion pump starts infusing.

[0040] In another embodiment, the liquid stop slider 110 includes an inclined surface 111. When the pump door 170 rotates to the closed position, the second contact end 172 contacts the inclined surface 111 to form a 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.

[0041] Of course, the inclined surface 111 can be adjusted to different angles to meet the control of different infusion speed. The inclined surface 111 can be protruding arranged on the side of the liquid stopping slider 110 matched with the pump door 170, the inclined surface 111 can be replaced and the angle can be adjusted, which is convenient for maintenance. Of course, the inclined surface 111 can also be integrally formed with the liquid stopping slider 110, which saves the cost.

[0042] The accompanying drawings are incorporated into the present application Figure 7 When the infusion pump completes the work, the pump door 170 is opened, the pump door 170 is rotated to the open position around the fixed shaft 180, the second contact point 174 of the second contact end 172 of the pump door 170 in contact with the inclined surface 111 of the liquid stopping slider 110 is continuously moved to the right side, and the liquid stopping slider 110 slides upward under the action of the elastic element 130. When the pump door 170 is no longer in contact with the liquid stopping slider 110, the pump door 170 completes the opening action, and the liquid stopping slider 110 slides to the fixed platform 120 to clamp the infusion tube, so that the purpose of opening the pump door 170 to stop the liquid is achieved.

[0043] When the infusion tube is clamped, if the infusion pump still needs to be used subsequently, the pump door 170 is closed, the second contact end 172 of the pump door 170 first contacts the inclined surface 111 of the liquid stopping slider 110, so that the liquid stopping slider 110 moves downward, and when the pump door 170 is completely closed, the liquid stopping slider 110 is limited in stroke and no longer moves downward. At this time, the infusion tube in the infusion tube channel 160 is in a semi-open and semi-closed working state, and the liquid in the infusion tube can flow freely. This process realizes that the pump door 170 is closed, the infusion tube channel 160 is opened to the limited stroke position, and the infusion tube returns to the semi-open and semi-closed working state.

[0044] The above embodiment is realized by rotating the first supporting rod relative to the base, sliding one end of the first supporting rod along the guide rail to drive the liquid stopping slider to move in the first direction, so that the distance between the second side of the liquid stopping slider and the fixed platform changes, and the opening or closing of the channel is realized. When the first supporting rod is rotated to be parallel to the first direction, the liquid stopping slider is positioned, the channel is opened, and the operator can place the infusion tube in the channel. When the first supporting rod deviates from the position parallel to the first direction, the liquid stopping slider is pressed against the fixed platform under the pressure of the elastic element, the channel is closed, and the purpose of stopping the liquid in time to prevent the liquid in the infusion tube from flowing backward is realized. The liquid stopping device has reasonable design, simple structure, convenient maintenance and low cost.

[0045] The present application also provides an infusion pump comprising the above-mentioned liquid stopping device 100. The specific structure of the liquid stopping device 100 is referred to the above-mentioned embodiments. Since the infusion pump adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0046] The above only discloses preferred embodiments of the present application, and of course cannot limit the scope of the present application. Under the idea of the present application, the above embodiments or technical features in different embodiments can be combined, and there are many other changes of different aspects of the present application as described above. For simplicity, they are not provided in details, and equivalent changes made according to the claims of the present application are still within the scope of the present application.

Claims

1. A fluid stop device, characterized by, The application relates to a liquid-stopping device. The liquid-stopping device comprises a liquid-stopping sliding block, a fixed platform, an elastic element, a first supporting rod and a base, the liquid-stopping sliding block is arranged on the base to slide in a first direction, the liquid-stopping sliding block comprises a first side and a second side arranged oppositely in the first direction, and a guide rail is arranged on the liquid-stopping sliding block. Two ends of the elastic element are connected to the base and the first side respectively, one end of the first supporting rod is rotationally connected to the base, the other end of the first supporting rod is slidingly connected to the guide rail, when the first supporting rod rotates relative to the base, the other end of the first supporting rod slides along the guide rail to drive the liquid-stopping sliding block to move in the first direction, when the first supporting rod rotates to be parallel to the first direction, the liquid-stopping sliding block and the fixed platform are arranged to be spaced in the first direction to form a channel for a transfusion tube to pass through. The guide rail is a groove arranged on the liquid-stopping sliding block, the other end of the first supporting rod is provided with a roller, and the roller is arranged to roll in the guide rail. The guide rail is an arc-shaped guide rail, and the arc-shaped guide rail takes the rotation center of the first supporting rod as a center.

2. The fluid stop of claim 1, wherein The liquid-stopping device further comprises a second supporting rod, the second supporting rod is connected to one end of the first supporting rod and is used to drive the first supporting rod to rotate.

3. The fluid stop of claim 2, wherein, The second supporting rod and the first supporting rod have an included angle.

4. The fluid stop of claim 2, wherein, The liquid-stopping device further comprises a pump door, the pump door is rotationally connected to the base through a fixed shaft, and the pump door is provided with a contact end used to contact the second supporting rod and the liquid-stopping sliding block.

5. The fluid stop of claim 4, wherein, The contact end comprises a first contact end and a second contact end, when the pump door rotates to a closed position, the first contact end contacts the first supporting rod or the second supporting rod to make the first supporting rod deviate from the position parallel to the first direction, and the second contact end is used to abut against the liquid-stopping sliding block, and when the liquid-stopping sliding block abuts against the second contact end, the distance between the liquid-stopping sliding block and the fixed platform is smaller than the diameter of the transfusion tube.

6. The fluid stop of claim 5, wherein, The liquid-stopping sliding block comprises an inclined surface, after the pump door rotates to the closed position, the second contact end contacts the inclined surface.

7. The fluid stop of claim 6, wherein The inclined surface is inclined to a direction away from the second contact arm in a direction from the first side to the second side.

8. An infusion pump, characterized by The application further relates to a liquid-stopping device.

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