CN211561371U - Infusion pump - Google Patents

Abstract

The utility model discloses an infusion pump, the infusion pump is used for using with the transfer line is supporting, the infusion pump includes the casing, end liquid part and drive arrangement, the casing includes the supporting part, install the drive arrangement who ends liquid part and drive and end the motion of liquid part in the casing, end the liquid part and include the chuck that sets up relatively with the supporting part, the transfer line is arranged in between supporting part and the chuck, with end liquid part complex and be provided with the elastic component, the chuck is opened to the direction motion of keeping away from the transfer line under drive arrangement's drive, the chuck is extruded the transfer line in order to keep closing by the effect of elastic component under non-drive state. When the infusion pump is applied, the liquid stopping component pushes the chuck to extrude the infusion tube to keep closed under the elastic action of the elastic piece in a non-driving state. When the chuck needs to be opened, the driving device drives the liquid stopping component to move, so that the chuck is opened. The reliability of the driving device can not influence the liquid stopping of the chuck, so that the reliability of the liquid stopping state of the infusion pump is improved, and the risk of liquid leakage or free flow is reduced.

Description

Infusion pump

Technical Field

The utility model relates to the technical field of medical equipment, more specifically say, relate to an infusion pump.

Background

An infusion pump is an instrument for controlling the infusion speed by acting on an infusion tube, and is often used in situations where the infusion volume and the drug quantity need to be strictly controlled.

The electric liquid stopping clamp is an important part of the infusion pump instrument and is also a high-risk part. The functions are as follows: when a user installs the infusion tube, the liquid stopping clamp clamps the infusion tube to stop liquid as soon as possible; when the pump body begins to transfuse, the liquid stopping clamp must be opened first to ensure the pipeline to be smooth; when a user stops transfusion and prepares to open the door, the liquid stopping clamp is required to clamp the transfusion tube in time to realize liquid stopping. If the liquid stopping clamp can not be closed in time, free flow or excessive infusion can be brought, and great risk is brought to a patient.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an infusion pump, this infusion pump's structural design can solve effectively and ends the liquid clamp and close the problem that untimely causes free flow or excessive infusion.

The utility model provides an infusion pump, the infusion pump is used for using with the transfer line is supporting, the infusion pump includes the casing, ends liquid part and drive arrangement, the casing includes the supporting part, the utensil install in the casing end liquid part and drive end the motion of liquid part drive arrangement, end the liquid part include with the chuck that the supporting part set up relatively, the transfer line is arranged in the supporting part with between the chuck, with end liquid part complex and be provided with the elastic component, the chuck is in drive arrangement's drive is down to keeping away from the direction motion of transfer line and opening, the chuck receives under non-drive state the effect extrusion of elastic component the transfer line is in order to keep closing.

With the infusion pump provided by the embodiment, when the liquid stopping component is in a non-driving state, the elastic force of the elastic element pushes the chuck to press the infusion tube to keep the infusion tube closed. When the clamping head needs to be opened, the driving device drives the liquid stopping component to move, so that the clamping head moves towards the direction far away from the infusion tube, namely the liquid stopping component is opened. Therefore, even when the driving device fails, the closing of the chuck cannot be influenced, the reliability of the liquid stopping state of the infusion pump is improved, and the risk of liquid leakage or free flow caused by the fact that the liquid stopping chuck cannot be completely closed or cannot be closed in time due to the failure of the driving device or the inaccuracy of the starting position is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic view of an internal partial structure of an infusion pump according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of fig. 1.

The drawings are numbered as follows:

the device comprises a left shell 1, a right shell 2, a liquid stopping component 3, a push rod 3a, a rotating shaft 3b, a chuck 3c, a sliding part 4, a transition structure 4a, a first horizontal limiting section 4b, an inclined limiting section 4c, a second horizontal limiting section 4d, a motor 5, a gear set 5a, a nut 5b, a screw rod 5c, an elastic part 6, an infusion tube 7 and a supporting part 8.

Detailed Description

The embodiment of the utility model discloses transfer pump has promoted the reliability that transfer pump ends the liquid state, has reduced the risk of weeping or free flow.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, fig. 1 is a schematic view of an internal partial structure of an infusion pump according to an embodiment of the present invention; fig. 2 is a schematic cross-sectional view of fig. 1.

The utility model provides an infusion pump which is used in cooperation with an infusion tube 7. The infusion pump comprises a housing, a liquid stop member 3 and a drive means.

Wherein, the liquid stopping component 3 is arranged in the shell, the liquid stopping component 3 comprises a chuck 3c, the shell is provided with a supporting part 8 which is arranged opposite to the chuck 3c, and the transfusion tube 7 is arranged between the supporting part 8 and the chuck 3 c. The clamp 3c of the liquid stopping component 3 rotates towards the support part 8 or moves linearly towards the support part 8 to be matched with the support part 8 to clamp and close the infusion tube 7, and when the clamp 3c rotates towards the direction away from the support part 8 or moves linearly, the infusion tube 7 is reset and released to be opened. The housing may include a mounting portion provided opposite to the support portion 8, as necessary, and a passage for accommodating the infusion tube 7 may be formed between the support portion 8 and the mounting portion. The top surface of the mounting part is provided with a mounting groove, and the chuck 3c of the liquid stopping part 3 is positioned in the mounting groove.

An elastic part 6 is arranged in cooperation with the liquid stopping part 3, and the clamping head 3c is in a normally closed state under the action of the elastic part 6, namely, the transfusion tube 7 is pressed to be kept closed. The driving chuck 3c overcomes the acting force of the elastic piece 6 to move towards the direction far away from the infusion tube 7 to open the chuck 3c, so that the infusion tube 7 is released to open the infusion tube, and the opening degree of the chuck 3c is different, so that the opening degree of the corresponding infusion tube 7 is different.

And a driving device is arranged in match with the liquid stopping component 3 and is used for driving the liquid stopping component 3 to move. Specifically, the clamp 3c is driven by the driving device to move in a direction away from the infusion tube 7 against the elastic force of the elastic member 6 to open, and the clamp 3c presses the infusion tube 7 to keep closed by the action of the elastic member 6 in a non-driving state. It should be noted that the non-driving state mentioned here and below refers to a state in which the chuck 3c is not driven by the driving device, or the driving action of the driving device is not enough to open the chuck 3c against the elastic force of the elastic member 6, and includes both the driving device directly driving the chuck 3c and the driving device driving the chuck 3c through the transmission assembly. In the case where the driving device drives the chuck 3c through the transmission assembly, the non-driving state is that the chuck 3c is not subjected to the driving action transmitted by the transmission assembly, or the driving action transmitted by the transmission assembly is not enough to overcome the elastic force of the elastic member 6 to open the chuck 3 c. The non-driving state includes the stop of the driving device when the driving device directly drives the chuck 3c, and also includes the closed state of the chuck 3c when the driving device fails to work normally, such as when the driving action of the driving device is insufficient to overcome the elastic force of the elastic member 6.

Accordingly, here and in the following, the driving state refers to the driving force of the driving means to which the gripper 3c is subjected, and the driving force work is greater than the elastic force work of the elastic member 6. When the driving action of the driving device to which the cartridge 3c is subjected is not enough to fully open the cartridge 3c against the elastic force of the elastic member 6, the cartridge 3c is correspondingly opened by a corresponding angle.

According to the requirement, a limit groove can be arranged on the shell, and the infusion tube 7 straightly passes through the infusion pump under the limit action of the limit groove.

When the infusion pump provided by the utility model is used, the liquid stopping component 3 pushes the chuck 3c to extrude the infusion tube 7 to keep closed under the non-driving state by the elastic action of the elastic component 6. When the clamp 3c needs to be opened, the driving device drives the liquid stopping component 3 to move, so that the clamp 3c moves away from the infusion tube 7, namely the liquid stopping component 3 is opened. Therefore, even when the driving device fails, the closing of the chuck 3c is not affected. The liquid stopping component 3 adopts a normally closed structure, and compared with a normally open structure, the liquid stopping component 3 is closed under the driving of the driving system, the driving system does not need to drive the liquid stopping component 3 in the infusion process, and the driving liquid stopping component 3 is labor-saving when being closed, so that the requirements on the power consumption of the driving system and the like are low. However, when the driving system is in failure or the starting position is not accurate, the normally open liquid stopping component 3 cannot be completely closed, and the risk of liquid leakage or free flow exists. And the liquid stopping component 3 adopts a normally closed structure, the reliability of the driving device only influences the opening angle of the chuck 3c, and does not influence the liquid stopping of the chuck 3c in a non-driving state, so that the reliability of the liquid stopping state of the infusion pump is improved, and the risk of liquid leakage or free flow caused by the fact that a liquid stopping clamp cannot be completely closed or cannot be closed in time due to the failure or inaccurate starting position of the driving device is reduced.

Specifically, the driving device is a torque output device, the output end of the torque output device is connected with the input end of the transmission assembly, the transmission assembly converts the torque output by the torque output device into linear motion, and the liquid stopping component 3 is matched with the output end of the transmission assembly to be opened or closed along with the linear motion of the output end of the transmission assembly. That is, the torque output by the torque output device is converted into linear motion through the transmission assembly, and then the liquid stopping component 3 is driven to move, so that the chuck is opened or closed. The liquid stopping component 3 can move linearly along with the output end of the transmission component, can rotate along with the output end of the transmission component, and can extrude the infusion tube to be closed through linear motion or rotation, or move reversely to be opened.

The transmission assembly specifically comprises a screw rod 5c and a sliding part 4 in threaded fit with the screw rod 5c, the screw rod 5c is connected with the output end of the torque output device, and the sliding part 4 is matched with the liquid stopping part 3. The torque output by the torque output device drives the screw rod 5c to rotate, the screw rod 5c is in threaded fit with the sliding part 4, the sliding part 4 is driven by the rotation of the screw rod 5c to move linearly along the screw rod 5c, and the sliding part 4 drives the liquid stopping part 3 to move. The torque output by the torque output device is converted into linear motion by the matching of the screw rod 5c and the sliding piece 4, the structure is reliable, and the transmission precision is high. According to the requirement, the transmission assembly can also adopt a connecting rod assembly and the like, and the aim of converting the torque output by the torque output device into linear motion is fulfilled. Through the transmission of the transmission assembly, the direction of the torque output by the torque output device is effectively changed, and the spatial arrangement of all parts in the infusion pump is facilitated. The driving device adopts a torque output device, specifically can be a motor 5 and the like, has high precision, and can further more accurately control the opening and opening angles of the chuck 3 c. The motor 5 can be specifically matched with the screw rod 5c through the gear set 5a to drive the screw rod 5c to rotate. The slide 4 may in particular be plate-shaped in order to save space.

The screw rod 5c is in threaded fit with the sliding part 4, specifically, a nut 5b is arranged in fit with the screw rod 5c, and the nut 5b is connected with the sliding part 4, so that when the screw rod 5c rotates, the nut moves axially along the screw rod 5c and drives the sliding part 4 to move axially along the screw rod 5 c. The sliding part 4 is in clearance fit with the nut 5b, so that the problem that the sliding part 4 and the screw rod 5c are locked due to system errors is solved. Specifically, a transition structure 4a is fixed on the sliding part 4, and the transition structure 4a is in clearance fit with the nut 5 b.

The transmission assembly drives the liquid stopping component 3 to move, specifically, the output end of the transmission assembly is provided with a limiting groove, the liquid stopping component comprises a push rod inserted into the limiting groove, the limiting groove is provided with an opening position and a closing position, the torque output device drives the transmission assembly to move so that the push rod moves along the limiting groove, the chuck is opened when the push rod moves to the opening position, and the chuck is closed when the push rod moves to the closing position. That is, through the setting of spacing groove, play limiting displacement to push rod 3a of liquid-stopping component 3, and then when transmission assembly output linear motion, push rod 3a can be by the corresponding motion of promotion in spacing groove for chuck 3c opens or closes. It should be noted that, the movement of the push rod 3a along the limit groove refers to that in the process of the linear motion of the output end of the transmission assembly, the limit groove moves relative to the push rod 3a, and the push rod 3a can generate linear motion or rotation under the pushing action of the limit groove, and the linear motion or rotation is determined by the limit action of the limit groove, so that the push rod 3a reciprocates between the open position and the closed position.

Taking the transmission assembly comprising the screw rod 5c and the sliding part 4 as an example, the sliding part 4 is provided with a limit groove, when the chuck 3c needs to be opened, the screw rod 5c is driven to rotate through the driving device, the sliding part 4 moves linearly, the limit groove moves linearly relative to the push rod 3a, and due to the pushing action of the limit groove, the push rod 3a moves from a closing position to an opening position along the limit groove, and the chuck 3c is opened. When the chuck 3c needs to be closed, the screw rod 5c can be driven by the driving device to rotate reversely so as to reset the sliding part 4, the push rod 3a resets along the limiting groove, and the chuck 3c extrudes the infusion tube 7 under the action of the elastic part 6 so as to keep closing. If necessary, when the slide 4 can drive the screw 5c to rotate and the restoring force of the elastic member 6 is sufficiently large, the driving device may be stopped, and the restoring force of the elastic member 6 drives the liquid stopper 3 to return and causes the clamp 3c to press the infusion tube 7 to be closed, and the push rod 3a pushes the slide 4 to return.

Furthermore, the limiting groove is provided with two opening positions which are respectively positioned at two sides of the closing position, the clamping head 3c is opened to install the infusion tube 7 when the push rod 3a moves from the closing position to one of the opening positions along the limiting groove, and the clamping head 3c is opened to perform infusion when the push rod moves to the other opening position. When the infusion pump is used, the chuck 3c needs to be opened when the infusion tube 7 is installed, the chuck 3c is closed for detection after the infusion tube 7 is installed in place, and the chuck 3c is opened during infusion, so that the limiting groove is provided with two open positions positioned at two sides of the closed position, the chuck 3c is closed when the push rod 3a is positioned at the closed position, and the chuck 3c is opened when the push rod 3a is driven by the torque output device to move to the open positions at two sides along the limiting groove respectively. So arranged, it is convenient to open and close the cartridge 3c at different times.

Furthermore, the limiting groove comprises a first horizontal limiting section 4b, two inclined limiting sections 4c and two second horizontal limiting sections 4d, one end of each of the two inclined limiting sections 4c is connected with two ends of the first horizontal limiting section 4b, the other end of each of the two inclined limiting sections is connected with one end of each of the second horizontal limiting sections 4d, the other end of each of the second horizontal limiting sections 4d horizontally extends in the direction away from the inclined limiting section 4c, the distance between the two inclined limiting sections 4c is gradually increased from one end connected with the first horizontal limiting section 4b to the other end, the whole limiting groove is in a shape like a Chinese character 'ji', the first horizontal limiting section 4b is closed, and the two second horizontal limiting sections 4d are opened respectively.

As shown in FIG. 1, for the convenience of illustration, the second horizontal limiting section 4d on the right side in FIG. 1 is used as an open position for tubing, and the corresponding second horizontal limiting section 4d on the left side is used as an open position for transfusion. When the pipe is installed, the driving device drives the output end of the transmission assembly to move leftwards, the output end moves leftwards along with the limiting groove, the push rod 3a is pushed by the first horizontal limiting section 4b and the right inclined limiting section 4c to move to the second horizontal limiting section 4d on the right side, and the chuck 3c is correspondingly opened to install the pipe.

After the tube is installed, the driving device drives the output end of the transmission assembly to move towards the right side for resetting, the output end moves towards the right side along with the limiting groove and moves towards the right, the push rod 3a is pushed by the second horizontal limiting section 4d on the right side by the right inclined limiting section 4c and resets to the first horizontal limiting section 4b, and then the chuck 3c is correspondingly closed.

At this time, when the driving device drives the output end of the transmission assembly to move rightward continuously, the first horizontal limiting section 4b moves relative to the push rod 3a, and at this time, the push rod 3a is not kept still by the pushing action of the limiting groove, that is, the chuck 3c is in a non-driving state, so that the chuck 3c is kept in a closing state, and the infusion pump can correspondingly perform operations such as self-checking.

The driving device drives the output end of the transmission component to move rightwards continuously, the output end moves rightwards along with the limiting groove, the push rod 3a is pushed by the inclined limiting section 4c on the left side to move to the second horizontal limiting section 4d on the left side, the chuck 3c is opened correspondingly, and infusion is started.

When the transfusion is finished, the driving device drives the output end of the transmission component to move leftwards, the output end moves leftwards along with the limiting groove, the push rod 3a is pushed by the left second horizontal limiting section 4d by the left inclined limiting section 4c to reset to the first horizontal limiting section 4b, and the chuck 3c is correspondingly closed. The limiting groove is arranged as above, so that the driving device is convenient to control, and the limiting groove does not need to be started and stopped at each stage respectively. And through the setting of the spacing section 4d of second level for the limiting displacement to push rod 3a is more reliable when opening the position. According to the requirement, the second horizontal limiting section 4d positioned at the left side in the figure 1 can be used as an opening position for tube loading, and the corresponding second horizontal limiting section 4d positioned at the right side can be used as an opening position for transfusion.

In the above embodiment, the limiting groove may also include a first horizontal limiting section 4b and two inclined limiting sections 4c respectively connected to two ends of the horizontal limiting section 4b, and the distance between the two inclined limiting sections 4c gradually increases from one end connected to the first horizontal limiting section 4b to the other end, the first horizontal limiting section 4b is in a closed position, and the end portions of the two inclined limiting sections 4c are in open positions respectively. Namely, the end parts of the two inclined limiting sections 4c are respectively used as opening positions, and the second horizontal limiting section 4d is not required to be arranged.

In each embodiment that the driving device is a torque output device and the liquid stopping component 3 is driven to move by the transmission component, specifically, the rotating shaft 3b is arranged in the shell, the liquid stopping component 3 is rotatably installed around the rotating shaft 3b, then the transmission component converts the torque output by the torque output device into linear motion, the liquid stopping component 3 is matched with the output end of the transmission component, and the output end of the transmission component is driven to rotate around the rotating shaft 3b to open or rotate reversely to close.

In the embodiment that the limiting groove comprises the first horizontal limiting section 4b, the two inclined limiting sections 4c and the two second horizontal limiting sections 4d, the push rod 3a rotates under the pushing of the inclined limiting section 4c along with the linear movement of the limiting groove, so that the liquid stopping component 3 is opened and closed in different working sections. Through rotating the installation of liquid stopping component 3, can be better utilize transfer pump inner space, and the opening and closing of transfer line 7 is realized to the forward and reverse rotation of chuck 3c, and the extrusion force to transfer line 7 when closing is more reliable. As shown in fig. 2, the clamp 3c presses the infusion tube 7 to close when rotated counterclockwise, and opens the infusion tube 7 when rotated clockwise. If necessary, the clamp 3c may be rotated clockwise to press the infusion tube 7 to close the tube, and rotated counterclockwise to open the infusion tube 7.

Further, the linear motion direction of the output end of the transmission assembly is parallel to the rotating shaft 3b, and the extension direction of the push rod 3a is perpendicular to the rotating shaft 3 b. In the case that the transmission assembly includes the lead screw 5c and the slider 4, as shown in fig. 1 and 2, the lead screw 5c is disposed in parallel with the rotating shaft 3b of the liquid stopping member 3, the push rod 3a of the liquid stopping member 3 extends perpendicularly to the rotating shaft 3b, and the top end thereof is engaged with the limit groove disposed on a plane parallel to the rotating shaft 3b, so that when the output end of the transmission assembly moves in parallel with the rotating shaft 3b, taking the example that the output end of the transmission assembly moves leftward in parallel with the rotating shaft 3b, the push rod 3a rotates due to the limit effect of the limit groove, in fig. 1, when the chuck 3c is closed, the output end of the transmission assembly moves leftward in parallel with the rotating shaft 3b, and the push rod 3a moves forward along the limit groove, so that the push rod 3a rotates clockwise to open.

If necessary, the clamp 3c may be slidably mounted in the housing, and the push rod 3a may be driven by the driving device to linearly slide along the stopper groove, so that the clamp 3c is moved in a direction away from the infusion tube 7 to be opened. In the case where the clamp 3c is slidably attached, the driving device may be a telescopic cylinder or the like to push the clamp 3c to move in a direction away from the infusion tube 7 and open it.

In each embodiment that the driving device is a torque output device, further, the torque output device is also used for driving a door of the infusion pump to open and close, if the transmission assembly can adopt a lock rod and a screw rod 5c for locking the door in the infusion pump, the liquid stop component and the door to open and close share the torque output device, the occupied space can be effectively reduced without independently arranging the torque output device, and the miniaturization design of the infusion pump is facilitated. The specific torque distribution manner is set according to the requirement, and is not particularly limited herein. And through the torque distribution of the torque output device, the problem of larger power consumption of the normally closed liquid stopping component 3 can be solved.

According to actual requirements, when the driving device is a torque output device, the torque output device may be separately provided corresponding to the liquid stopping member 3, and an output end of the torque output device may be connected to the liquid stopping member 3 to drive the liquid stopping member 3 to rotate so as to open the chuck 3 c. The torque output device is independently arranged to drive the liquid stopping component 3 to be opened, and a complex transmission structure is not required.

In the above embodiments, the elastic member 6 is a compression elastic member, one end of the compression elastic member abuts against the housing, and the other end of the compression elastic member abuts against one end of the collet 3c away from the infusion tube 7. The restoring force of the compressed elastic member pushes the clamp 3c to press against the infusion tube 7 to keep it closed. The compression elastic piece is arranged at one end of the clamping head 3c departing from the infusion tube 7, so that the compression elastic piece can be conveniently installed. The compression elastic member may be a compression spring, such as a compression coil spring. When a compression helical spring is adopted, a bulge can be arranged at one end of the pressure head 3c departing from the infusion tube 7, and the bulge is inserted into the hollow part at one end of the compression helical spring so as to support and limit the compression helical spring and enable the compression helical spring to deform more stably. The shell can be provided with a mounting groove, and one end of the compression spiral spring is arranged in the mounting groove. Other elastic material members and structural members that provide elastic restoring force may be used as desired.

As required, the elastic member 6 may be a tensile elastic member, one end of which is connected to the housing, and the other end of which is connected to one end of the clip 3c that presses the infusion tube 7. The restoring force of the tensile elastic member pulls the clamp 3c to press toward the infusion tube 7 to keep it closed. The tension elastic member may be specifically a tension spring, such as a tension coil spring or the like. Other elastic material members and structural members that provide elastic restoring force may be used as desired.

Alternatively, the elastic member 6 may be a torsion spring, one end of which abuts against the housing, and the other end of which abuts against the liquid stopping member 3. The restoring force of the torsion spring can drive the clamping head 3c to press the infusion tube 7 to keep closed. Specifically, when the liquid stopping member 3 is rotatably mounted around the rotating shaft 3b in the housing, the torsion spring may be coaxially disposed with the rotating shaft 3b, and the elastic restoring force of the torsion spring pushes the clamp 3c to move in a direction approaching the infusion tube 7 so as to press the infusion tube 7 to be kept closed.

In each of the above embodiments, the end surface of the clamp 3c facing the infusion tube 7 has a sharp corner, and presses the infusion tube 7 by the sharp corner. Through the setting of closed angle, be line contact when extrusion transfer line 7, under the same pressure condition, chuck 3c is bigger to the pressure of transfer line 7, and the extrusion effect of more reliable assurance to transfer line 7 makes it keep effectively closing. Of course, the sharp corner of the collet 3c should be sharp enough not to cut the infusion tube 7 open.

In order to ensure the reliability of the opening or closing of the chuck 3c, in the above embodiments, the liquid stopping member 3 further includes a detecting portion, a detecting position is correspondingly disposed on the housing, the detecting position is a position of the liquid stopping member 3 corresponding to the detecting portion in the closed state and/or the open state, and a sensor for sensing the other one is disposed on one of the detecting portion and the detecting position. Specifically, the detecting portion may be a protrusion structure, and in the case where the liquid stopping member 3 is rotatably installed, the detecting portion should be offset from the rotating shaft 3b, that is, the position of the detecting portion should be changed when the liquid stopping member 3 moves, so as to reflect the position of the cartridge 3c by the position of the detecting portion. Taking the detection position as the position of the liquid stopping component 3 corresponding to the detection part in the closed state, and setting a sensor on the detection position as an example, when the liquid stopping component 3 moves to close the chuck 3c, the sensor can sense the detection part, thereby judging that the chuck 3c is closed. When the liquid stopping member 3 moves to open the chuck 3c, the sensor will not sense the detection part any more, and the chuck 3c can be judged to be opened. Alternatively, a sensor may be provided in the detection portion, and when the liquid stopping member 3 moves to close the cartridge 3c, the sensor may sense the detection position, thereby determining that the cartridge 3c is closed. When the liquid stopping component 3 moves to open the chuck 3c, the sensor does not sense the detection position any more, and the chuck 3c can be judged to be opened.

The detection position may be a position where the liquid stopping member 3 corresponds to the detection portion in the opened state, and the specific principle is similar to the above-described process, and will not be described in detail here. Through the setting of inductor, can open or close monitoring to chuck 3c, under the circumstances such as drive arrangement or elastic component trouble, when chuck 3c fails to actually open or close, the abnormal conditions can in time be known to the inductor, has further guaranteed the reliability of transfer pump.

Specifically, the inductor is an optical coupler. For the concrete structure and working principle of the optical coupler, please refer to the prior art, which is not described herein again. By taking the detection position as the position of the liquid stopping component 3 corresponding to the detection part in the closed state and arranging the optical coupler on the detection position as an example, when the liquid stopping component 3 moves to the position where the chuck 3c is closed, the detection part moves to a position between the light emitter and the light receiver of the optical coupler, and the light receiver does not generate light current because the light of the light emitter is not received any more due to the blocking of the detection part, thereby judging the closing of the chuck 3 c. When the liquid stopping component 3 moves to open the chuck 3c, the detection part is separated from the light emitter and the light receiver, and the light receiver generates photocurrent after receiving the light of the light emitter and flows out from the output end, so that the opening of the chuck 3c can be judged.

In one embodiment, the infusion pump is used with an infusion tube 7 and includes a housing, a fluid stop member 3, a torque output device, a lead screw 5c, and a slider 4.

Wherein, the output of moment of torsion output device is connected with lead screw 5c, slider 4 and the screw-thread fit of lead screw 5c, the spacing groove has on the slider 4, the spacing groove includes the spacing section 4b of first level, two spacing sections 4c of slope and two spacing sections 4d of second level, the one end of two spacing sections 4c of slope is connected with the spacing section 4b both ends of first level respectively, the other end is connected with the one end of the spacing section 4d of second level respectively, the other end of the spacing section 4d of second level extends to the direction level of keeping away from the spacing section 4c of slope, and the interval between the spacing section 4c of two slopes is by the one end of being connected with the spacing section 4b of first level to the other end crescent.

The casing includes supporting part 8 and axis of rotation 3b, axis of rotation 3b with lead screw 5c parallel arrangement, end liquid part 3 and revolve axis of rotation 3b and rotate the installation, and end liquid part 3 and include chuck 3c that extends forward by axis of rotation 3b and the push rod 3a that upwards extends, chuck 3c and supporting part 8 set up relatively, and push rod 3a inserts the spacing groove, and transfer line 7 is arranged in between supporting part 8 and chuck 3c, and it is provided with elastic component 6 to end liquid part 3 complex.

Under the drive of the torque output device, the limit groove moves linearly relative to the push rod 3a, the push rod 3a is pushed by the inclined limit section 4c to enable the liquid stopping component 3 to rotate around the rotating shaft 3b, the limit groove moves until the push rod 3a is located at the first horizontal limit section 4b, the chuck 3c is closed under the action of the elastic piece 6, and when the limit groove moves until the push rod 3a is located at the second horizontal limit section 4d, the chuck 3c is pushed by the second horizontal limit section 4d to overcome the action of the elastic piece 6 and is opened.

In operation, as shown in fig. 1, for convenience of illustration, the second horizontal limiting section 4d on the right side in fig. 1 is used as an open position for tubing, and the corresponding second horizontal limiting section 4d on the left side is used as an open position for transfusion. When the pipe is installed, the driving device drives the output end of the transmission assembly to move leftwards, the output end moves leftwards along with the limiting groove, the push rod 3a is pushed by the first horizontal limiting section 4b and the right inclined limiting section 4c to rotate around the rotating shaft 3b to the second horizontal limiting section 4d on the right side, and the chuck 3c is correspondingly opened to install the pipe. When the sliding part 4 is a lock rod for realizing the door opening and closing, the sliding part 4 moves to the second horizontal limiting section 4d on the right side of the push rod 3a, and the lock rod opens the door, so that the tube installation is convenient.

After the tube is installed, the driving device drives the output end of the transmission assembly to move towards the right side for resetting, and moves towards the right along with the limiting groove, so that the push rod 3a is pushed by the second horizontal limiting section 4d on the right side to rotate reversely by the inclined limiting section 4c on the right side, and is reset to the first horizontal limiting section 4b, and the chuck 3c is correspondingly closed. When the sliding part 4 is a lock rod for realizing door opening and closing, the sliding part 4 moves to the position where the push rod 3a is located at the first horizontal limiting section 4b, and then the lock rod closes the door.

At this time, when the driving device drives the output end of the transmission assembly to move rightward continuously, the first horizontal limiting section 4b moves relative to the push rod 3a, and at this time, the push rod 3a is not kept still by the pushing action of the limiting groove, that is, the chuck 3c is in a non-driving state, and the chuck 3c is kept in a closing state under the action of the elastic element, so that the infusion pump can perform operations such as self-checking correspondingly.

The driving device drives the output end of the transmission component to move rightwards continuously, the output end moves rightwards along with the limiting groove, the push rod 3a rotates to the second horizontal limiting section 4d on the left side around the rotating shaft 3b under the pushing action of the inclined limiting section 4c on the left side, the chuck 3c is opened correspondingly, and infusion is started.

When the transfusion is finished, the driving device drives the output end of the transmission component to move leftwards, then the output end moves leftwards along with the limiting groove, the push rod 3a rotates reversely around the rotating shaft 3b under the pushing of the left second horizontal limiting section 4d and the left inclined limiting section 4c, the push rod resets to the first horizontal limiting section 4b, and the chuck 3c is correspondingly closed.

The liquid stopping member 3 includes a chuck 3c extending forward from the rotary shaft 3b and a push rod 3a extending upward, where the chuck 3c is located forward of the rotary shaft 3b by a straight or curved extension and the push rod 3a is located above the rotary shaft 3b by a straight or curved extension, respectively. The liquid stopping component 3 specifically further comprises an extending part extending backwards, a barrier strip matched with the optical coupler is arranged on the extending part, and the optical coupler used for sensing the barrier strip is arranged on the shell corresponding to the position of the liquid stopping component 3 in a closed state. When the liquid stopping component 3 moves to the chuck 3c to be closed, the optical coupler can sense the barrier strip, and therefore the chuck 3c is judged to be closed. And when the liquid stopping component 3 moves to open the chuck 3c, the optical coupler does not sense the barrier strip any more, and then the chuck 3c can be judged to be opened.

One end of the chuck 3c departing from the infusion tube 7 can be provided with a stopper extending in the direction away from the infusion tube 7, such as a baffle, the stopper is matched with the shell, and when the chuck 3c rotates to one side of the infusion tube, the stopper can still contact with the shell to prevent impurities outside the shell and the like from entering the shell.

The elastic component specifically can be compression coil spring, then sets up the mounting groove on the casing, and in compression coil spring's one end was arranged the mounting groove in, the one end that pressure head 3c deviates from transfer line 7 set up the arch, and the arch inserts the cavity department of the compression coil spring other end to play support and limiting displacement to compression coil spring, make its deformation more steady.

The clamping head 3c extends forwards, the top end of the clamping head is in a sharp-angle shape and is arranged straightly, and the sharp angle is parallel to the supporting part when the clamping head 3c is closed, so that the transfusion tube can be better extruded.

The distance from the rotating shaft 3b to the end of the chuck 3c is as long as possible while allowing space, and specifically, the push rod 3a extends upward from the rotating shaft 3b and is located in front of the rotating shaft 3 b. On one hand, the rotating arm of the chuck 3c is longer, so that labor is saved for driving the chuck to rotate. On the other hand, the size of the inner end of the opening formed by the clip 3c and the support portion 8 can be relatively large to facilitate placement of the infusion tube 7.

In order to reduce the weight of the liquid stop member 3, the liquid stop member 3 is reduced in weight by providing a groove or the like while satisfying the strength requirement.

The structure of the infusion pump liquid stopping component 3 and the structure and connection relation of the driving device matched with the liquid stopping component 3 are mainly described in the application, and for the arrangement of other structures such as a pump sheet in the infusion pump, the structure of a conventional infusion pump can be referred to, and the description is omitted here. In one embodiment, the left shell 1 and the right shell 2 are separately provided corresponding to the liquid stopping member 3, the left shell 1 and the right shell 2 are fixedly connected, and the liquid stopping member 3 is installed therein. The end surfaces of the left shell 1 and the right shell 2 are provided with passages, and the clamping heads 3c are positioned in the passages. By providing the left and right cases 1 and 2, the liquid stop member 3 is integrated inside, facilitating installation thereof as a whole.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (15)

1. The utility model provides an infusion pump, a serial communication port, the infusion pump is used for using with the transfer line is supporting, the infusion pump includes the casing, ends liquid part and drive arrangement, the casing includes the supporting part, install in the casing end the liquid part, end the liquid part include with the relative chuck that sets up of supporting part, the transfer line is arranged in the supporting part with between the chuck, and with end liquid part complex be provided with the elastic component, the chuck is in to keeping away from under drive arrangement's the direction motion of transfer line and opening, the chuck receives under non-drive state the effect extrusion of elastic component the transfer line is in order to keep closing.

2. The infusion pump of claim 1, wherein said drive mechanism is a torque output mechanism, and an output end of said torque output mechanism is connected to said fluid stop member for driving said fluid stop member to rotate to open said clamp head.

3. The infusion pump of claim 1, wherein said drive mechanism is a torque output mechanism, an output end of said torque output mechanism is connected to an input end of a transmission assembly, said transmission assembly converts torque output by said torque output mechanism into linear motion, and said fluid stop member is engaged with an output end of said transmission assembly to open or close, respectively, in response to linear motion of said output end of said transmission assembly.

4. The infusion pump according to claim 3, wherein said transmission assembly comprises a lead screw connected to an output end of said torque output device and a slider threadedly engaged with said lead screw, said slider engaged with said fluid stop member.

5. The infusion pump according to claim 3, wherein the output end of the transmission assembly has a limiting groove, the liquid stopping member comprises a push rod inserted into the limiting groove, the limiting groove has an open position and a closed position, the torque output device drives the transmission assembly to move so that the push rod moves along the limiting groove, the chuck is opened when the push rod moves to the open position, and the chuck is closed when the push rod moves to the closed position.

6. The infusion pump according to claim 5, wherein said stopper groove has two said open positions and is located on both sides of said closed position, said clamp head opens to mount said infusion tube when said push rod moves from said closed position to one of said open positions along said stopper groove, and said clamp head opens to perform infusion when moving to the other of said open positions.

7. The infusion pump according to claim 6, wherein the limiting groove comprises a first horizontal limiting section, two inclined limiting sections and two second horizontal limiting sections, one end of each of the two inclined limiting sections is connected with two ends of the first horizontal limiting section, the other end of each of the two inclined limiting sections is connected with one end of the second horizontal limiting section, the distance between the two inclined limiting sections is gradually increased from one end connected with the first horizontal limiting section to the other end, the other end of each of the second horizontal limiting sections horizontally extends in the direction away from the inclined limiting sections, the first horizontal limiting section is the closed position, and the two second horizontal limiting sections are the open position.

8. The infusion pump according to any one of claims 5 to 7, wherein a rotating shaft is provided in the casing, the liquid stopping member is rotatably mounted around the rotating shaft, and the pushing rod is rotated along the limiting groove to open or close the clamping head.

9. The infusion pump of claim 8, wherein said linear motion of said drive assembly output is parallel to said axis of rotation and said plunger extends perpendicular to said axis of rotation.

10. The infusion pump of claim 9, wherein said clip is formed by extending forward from said shaft and said plunger is formed by extending upward from said shaft.

11. The infusion pump according to claim 1, wherein said elastic member is a compression elastic member, one end of said compression elastic member abuts against said housing, and the other end of said compression elastic member abuts against an end of said collet facing away from said infusion tube.

12. The infusion pump according to claim 1, wherein said elastic member is a torsion spring, one end of said torsion spring is abutted against said casing, and the other end of said torsion spring is abutted against said liquid stopping member.

13. The infusion pump according to claim 1, wherein said end surface of said clip facing said infusion tube has a sharp corner and said infusion tube is pressed by said sharp corner.

14. The infusion pump according to claim 1, wherein the liquid stopping member further comprises a detecting portion, a detecting position is correspondingly arranged on the casing, the detecting position is a position of the liquid stopping member corresponding to the detecting portion in a closed state and/or an open state, and a sensor for sensing the other one of the detecting portion and the detecting position is arranged on one of the detecting portion and the detecting position.

15. An infusion pump is characterized in that the infusion pump is used in cooperation with an infusion tube and comprises a shell, a torque output device, a screw rod, a sliding part and a liquid stopping part;

the output end of the torque output device is connected with the screw rod, the sliding part is in threaded fit with the screw rod, a limiting groove is formed in the sliding part and comprises a first horizontal limiting section, two inclined limiting sections and two second horizontal limiting sections, one end of each inclined limiting section is connected with two ends of the corresponding first horizontal limiting section, the other end of each inclined limiting section is connected with one end of the corresponding second horizontal limiting section, the other end of each second horizontal limiting section extends horizontally in the direction away from the corresponding inclined limiting section, and the distance between the two inclined limiting sections is gradually increased from the end connected with the first horizontal limiting section to the other end;

the shell comprises a supporting part and a rotating shaft, the rotating shaft is parallel to the screw rod, the liquid stopping part is rotatably installed around the rotating shaft, the liquid stopping part comprises a chuck extending forwards from the rotating shaft and a push rod extending upwards, the chuck and the supporting part are arranged oppositely, the push rod is inserted into the limiting groove, the infusion tube is arranged between the supporting part and the chuck, and an elastic part is arranged in a manner of being matched with the liquid stopping part;

the limiting groove moves linearly relative to the push rod under the driving of the torque output device, the push rod is pushed by the inclined limiting section to rotate, and when the limiting groove moves to the position where the push rod is located at the first horizontal limiting section, the chuck is closed under the action of the elastic part; when the limit groove moves to the position where the push rod is located at the second horizontal limit section, the chuck is pushed by the second horizontal limit section to overcome the action of the elastic piece and is opened.

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