Infusion pump

Abstract

The present invention proposes an infusion pump, comprising a housing, a plurality of medicine boxes, a plurality of driving mechanisms and a pump body. The driving mechanisms are arranged in a one-to-one correspondence with the medicine boxes. The driving mechanisms can drive the medicine boxes to move along the accommodating cavity to drive the infusion tube of the medicine box to extend or retract from the opening. The pump body is arranged corresponding to the opening, and the pump body is used to squeeze the infusion tube extending from the opening to output the liquid medicine in the medicine bag. The infusion pump proposed by the present invention is provided with a plurality of medicine boxes, which can simultaneously pre-load and infuse opioids, non-steroidal, sedatives and physiological saline. Each medicine box is equipped with a driving mechanism, which can drive the medicine box to move linearly so that the infusion tube is docked with the pump body. When it is necessary to infuse the liquid medicine in the corresponding medicine box, the driving mechanism can be controlled to drive the medicine box to dock with the pump body, and the pump body can be started to output the required liquid medicine. The present invention realizes the simultaneous infusion of multiple drugs by the medicine injection pump through a simple and ingenious structure, with low cost and good reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a drug injection pump. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] Currently, traditional electronic infusion pumps can only administer a single anesthetic at a time. Changing medications requires replacing the cartridge, which can increase patient pain and increase the doctor's workload. Some automated infusion devices can deliver a single medication and switch to administering saline. Compared to traditional infusion pumps, these automated infusion devices can only switch between an infusion mode and a blocking mode, making them difficult to implement and relatively costly. Summary of the Invention

[0004] The purpose of the present invention is to at least solve the technical problem of the inconvenience of mixing and infusing multiple drugs with existing infusion pumps. This purpose is achieved through the following technical solutions:

[0005] The present invention provides a drug injection pump, comprising:

[0006] The housing defines a receiving cavity therein, and the receiving cavity has an opening;

[0007] A plurality of medicine boxes are arranged in the accommodating cavity, wherein the medicine boxes include an infusion tube and a medicine bag, and the infusion tube is connected to the medicine bag;

[0008] A plurality of drive mechanisms are provided in the accommodating cavity, the drive mechanisms being arranged in one-to-one correspondence with the medicine boxes, and the drive mechanisms being capable of driving the medicine boxes to move along the accommodating cavity, so as to drive the infusion tubes of the medicine boxes to extend or retract from the opening;

[0009] A pump body is provided corresponding to the opening, and is used for squeezing the infusion tube extending from the opening to output the liquid medicine in the medicine bag.

[0010] The drug injection pump proposed by the present invention is equipped with multiple medicine boxes, which can pre-load and infuse opioids, non-steroidal anti-inflammatory drugs, sedatives and normal saline at the same time. Each medicine box is equipped with a driving mechanism, which can drive the medicine box to move linearly, so that the infusion tube is connected to the pump body. The pump body is used to squeeze the infusion tube so that the liquid medicine in the medicine box can be discharged. When the liquid medicine in the corresponding medicine box needs to be infused, the driving mechanism can be controlled to drive the medicine box to connect with the pump body, and the pump body can be started to discharge the required liquid medicine. The present invention realizes the simultaneous infusion of multiple drugs by the drug injection pump through a simple and ingenious structure, with low cost and good reliability.

[0011] In addition, the drug injection pump according to the present invention may also have the following additional technical features:

[0012] In some embodiments of the present invention, a plurality of the medicine boxes are arranged inside the accommodating cavity along a first direction, and the driving mechanism drives the medicine boxes to move along a second direction, and the first direction is perpendicular to the second direction.

[0013] In some embodiments of the present invention, the medicine box is arranged in the accommodating cavity in a manner that it can slide along the second direction, and the driving mechanism includes a card slot, a gear switching assembly and a handle. The card slot is arranged on the wall of the accommodating cavity, and the card slot includes a first gear slot and a second gear slot arranged in sequence along the second direction. The gear switching assembly is connected to the medicine box in a rotatable manner, and the handle is connected to the gear switching assembly. The gear switching assembly can be engaged with or separated from the card slot by its own rotation.

[0014] In some embodiments of the present invention, the gear switching assembly includes a rotating part, an elastic part and a movable part, the rotating part is connected to the medicine box in a rotatable manner, the rotating part is connected to the handle, the movable part includes a clamping part, a connecting part and an abutting part connected in sequence, the abutting part abuts against the rotating part, and the rotating part can drive the abutting part to move away from the slot by its own rotation to drive the clamping part away from the slot, the two ends of the elastic part are respectively connected to the movable part and the medicine box, and the elastic part can drive the clamping part to approach the slot.

[0015] In some embodiments of the present invention, a gear switching assembly is provided on both sides of the medicine box, the accommodating cavity is provided with slots corresponding to the two gear switching assemblies respectively, and both ends of the handle are connected to one gear switching assembly respectively.

[0016] In some embodiments of the present invention, a first guide portion is provided on the wall surface of the accommodating cavity, and the medicine box is provided with a second guide portion. The position of the first guide portion corresponds to the position of the second guide portion, and the first guide portion limits the second guide portion from sliding along the second direction.

[0017] In some embodiments of the present invention, the pump body includes a motor, a gear group and multiple cam groups, the motor is transmission-connected to the gear group, the cam group is transmission-connected to the gear group, the cam groups are arranged in a one-to-one correspondence with the medicine boxes, and the cam groups are used to squeeze the infusion tube extending from the opening to output the liquid medicine in the medicine bag.

[0018] In some embodiments of the present invention, the infusion pump further includes a switch, a rotating mechanism and a reset member. The switch is slidably connected to the housing, and the rotating mechanism is rotatably connected to the housing. The switch can drive the rotating mechanism to rotate by sliding itself to squeeze and cut off the infusion tube, and the reset member drives the rotating mechanism to rotate in a direction away from the infusion tube.

[0019] In some embodiments of the present invention, the sliding direction of the switch is arranged parallel to the infusion tube, the rotating mechanism is arranged between the switch and the infusion tube, the rotating mechanism includes a rotating bracket and a rotating shaft, the rotating shaft is connected to the shell, the first end of the rotating bracket is arranged corresponding to the switch, the second end of the rotating bracket is arranged corresponding to the infusion tube, the rotating bracket is rotatably connected to the rotating shaft, and the reset member includes a tension spring, and the two ends of the tension spring are respectively connected to the first end of the rotating bracket and the shell.

[0020] In some embodiments of the present invention, the housing is provided with a mounting port, and the switch is slidably arranged on the mounting port. The injection pump also includes a first limiting portion and a second limiting portion. The first limiting portion is provided at the mounting port, and the second limiting portion is provided at the switch. The first limiting portion and the second limiting portion cooperate to limit the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be construed as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to represent the same components.

[0022] In the attached figure:

[0023] Figure 1 Schematically shows a structural diagram of a drug injection pump according to an embodiment of the present invention from a first perspective;

[0024] Figure 2 Schematically shows a schematic structural diagram of a medicine box according to an embodiment of the present invention;

[0025] Figure 3 Schematically shows a schematic structural diagram of a medicine box and a driving mechanism according to an embodiment of the present invention;

[0026] Figure 4 Schematically shows a cross-sectional structural diagram of a drug injection pump according to an embodiment of the present invention;

[0027] Figure 5 Schematically shows a structural diagram of a rotating member according to an embodiment of the present invention;

[0028] Figure 6 Schematically shows a partial cross-sectional structural diagram of a switch of an injection pump according to an embodiment of the present invention;

[0029] Figure 7 Schematically shows a structural diagram of a drug injection pump according to an embodiment of the present invention from a second perspective;

[0030] Figure 8 The figure schematically shows the structure of the switch of the drug injection pump according to the embodiment of the present invention;.

[0031] The reference numerals are as follows:

[0032] 10: housing, 11: opening, 12: mounting port;

[0033] 20: infusion tube, 21: medicine bag;

[0034] 30: first gear slot, 31: second gear slot, 32: handle, 33: rotating member, 34: elastic member, 35: movable member, 351: clamping portion, 352: connecting portion, 353: abutting portion, 36: second guide portion;

[0035] 40: motor, 41: gear set, 42: cam set;

[0036] 50: switch, 51: reset member, 52: rotating bracket. DETAILED DESCRIPTION

[0037] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0039] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0040] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0041] like Figures 1 to 8 As shown, the present invention provides a drug injection pump, comprising:

[0042] The housing 10 defines an accommodating cavity therein, and the accommodating cavity has an opening 11 .

[0043] Multiple medicine boxes are arranged in the accommodating cavity, and the medicine boxes include an infusion tube 20 and a medicine bag 21, and the infusion tube 20 is connected to the medicine bag 21;

[0044] Multiple driving mechanisms are provided in the accommodating cavity, and the driving mechanisms are provided one by one corresponding to the medicine boxes. The driving mechanisms can drive the medicine boxes to move along the accommodating cavity to drive the infusion tube 20 of the medicine box to extend or retract from the opening 11;

[0045] The pump body is provided corresponding to the opening 11 , and is used for squeezing the infusion tube 20 extending from the opening 11 to output the liquid medicine in the medicine bag 21 .

[0046] It can be understood that the shell 10 can be a cubic structure, such as a cube or a rectangular parallelepiped, which is processed by injection molding. The interior of the shell 10 defines a accommodating cavity, the shape of which is adapted to the shell 10, and the accommodating cavity is used to accommodate the remaining components. One end of the accommodating cavity is an opening 11, and the opening 11 is used for the medicine box to extend and contact the pump body. The medicine box includes a cube or rectangular medicine bag 21, and an infusion tube 20. The infusion tube 20 is arranged at one end of the medicine bag 21 and is attached to the medicine bag 21 to facilitate squeezing. The driving mechanism can be a manual pulling mechanism or an electric push-pull mechanism, such as a screw motor 40 mechanism. When the driving mechanism is manual, the medicine box is moved in the accommodating cavity by manual pulling and snap-fitting, and extends from the opening 11 to dock with the pump body, so that the pump body can squeeze the infusion tube 20 to deliver the medicine liquid. The pump body can use the cam squeezing mechanism commonly used in infusion pumps, and squeeze the infusion tube 20 through multiple cam intervals so that the medicine liquid can be output.

[0047] The drug injection pump proposed by the present invention is equipped with multiple medicine boxes, which can pre-load and infuse opioids, non-steroidal anti-inflammatory drugs, sedatives and normal saline at the same time. Each medicine box is equipped with a driving mechanism, which can drive the medicine box to move linearly, so that the infusion tube 20 is docked with the pump body. The pump body is used to squeeze the infusion tube 20 so that the liquid medicine in the medicine box can be discharged. When the liquid medicine in the corresponding medicine box needs to be infused, the driving mechanism can be controlled to drive the medicine box to dock with the pump body, and the pump body can be started to discharge the required liquid medicine. The present invention realizes the simultaneous infusion of multiple drugs by the drug injection pump through a simple and ingenious structure, with low cost and good reliability.

[0048] In some embodiments of the present invention, a plurality of medicine boxes are arranged along a first direction of the accommodating cavity, and the driving mechanism drives the medicine boxes to move along a second direction, and the first direction is perpendicular to the second direction.

[0049] It is understood that multiple, for example, four, medicine boxes can be arranged at intervals along the first direction, each containing an opioid, a nonsteroidal anti-inflammatory drug, a sedative, and saline solution. The medicine boxes can be laterally fixed and separated by a retaining structure provided on the wall of the accommodating chamber. The medicine boxes can slide in a second direction, which can be the longitudinal direction of the accommodating chamber and corresponds to the opening 11. The second direction is perpendicular to the first direction, allowing multiple medicine boxes to be arranged laterally and facilitating individual drive of the medicine boxes by the drive mechanism, thereby extending the medicine boxes out of the opening 11 and docking with the pump body.

[0050] In some embodiments of the present invention, the medicine box is arranged in the accommodating cavity in a manner that can slide along the second direction. The driving mechanism includes a card slot, a gear switching assembly and a handle 32. The card slot is arranged on the wall of the accommodating cavity. The card slot includes a first gear slot 30 and a second gear slot 31 arranged in sequence along the second direction. The gear switching assembly is connected to the medicine box in a rotatable manner. The handle 32 is connected to the gear switching assembly. The gear switching assembly can be engaged with or separated from the card slot by its own rotation.

[0051] Specifically, a longitudinal sliding space is defined within the accommodating chamber, and one end of the sliding space is an opening 11, which is docked with the pump body. The driving mechanism is a manual push-pull mechanism. Two-speed slots are provided on the side wall of the accommodating chamber, including a first gear slot 30 and a second gear slot 31. The first gear slot 30 is used to limit the position of the medicine box when it is docked with the pump body. At this time, the gear switching component is engaged with the first gear slot 30 to achieve position locking, thereby preventing the medicine box from moving during the infusion process. The second gear slot 31 is used to limit the position of the medicine box when it is not in use. At this time, the gear switching component is engaged with the second gear slot 31 to achieve position locking, so that the medicine box is entirely accommodated in the accommodating chamber and does not contact the pump body. The gear switching assembly can be an arc-shaped assembly or a Z-shaped or L-shaped assembly, and can be specifically configured according to actual needs. The gear switching assembly can be rotatably connected to the housing 10 via a rotating shaft. The handle 32 is connected to one end of the gear switching assembly. Pulling the handle 32 can drive the gear switching assembly to rotate. The gear switching assembly has a protruding structure that is used to extend into the slot during rotation to achieve position locking. In actual use, the handle 32 drives the gear switching assembly to rotate to achieve position limiting of the medicine box. When the medicine box is in the non-limiting state, pulling the handle 32 can drive the medicine box to move in the second direction, achieving relative movement between the medicine box and the pump body. When the medicine box moves to the desired position, releasing the handle 32 can lock the medicine box position.

[0052] In some embodiments of the present invention, the gear switching assembly includes a rotating member 33, an elastic member 34 and a movable member 35. The rotating member 33 is connected to the medicine box in a rotatable manner. The rotating member 33 is connected to the handle 32. The movable member 35 includes a clamping portion 351, a connecting portion 352 and abutting portion 353 connected in sequence. The abutting portion 353 abuts against the rotating member 33. The rotating portion can drive the abutting portion 353 to move away from the card slot through its own rotation, so as to drive the clamping portion 351 away from the card slot. The two ends of the elastic member 34 are respectively connected to the movable member 35 and the medicine box. The elastic member 34 can drive the movable member 35 to approach the card slot.

[0053] The movable part 35 is provided with a plurality of movable parts 351 and 352, and the movable part 35 is provided with a plurality of movable parts 352 and 353. The movable part 35 is provided with a plurality of movable parts 351 and 353. The movable part 35 is provided with a plurality of movable parts 352 and 353. The movable part 35 is provided with a plurality of movable parts 351 and 352. One end of the member 33 is abutted. Specifically, the end of the rotating member 33 away from the handle 32 is rotatably connected to the shell 10 through a rotating shaft, and the rotating member 33 has a first abutting slope at this end. Correspondingly, the abutting portion 353 has a second abutting slope at the end corresponding to the rotating member 33. The first abutting slope is in contact with the second abutting slope. When the handle 32 is pulled, the rotating member 33 rotates, and the rotating member 33 transmits the force to the second abutting slope through the first abutting slope, pushing the movable member 35 in the insertion direction away from the slot. At this time, the movable member 35 disengages from the slot, and the medicine box is no longer limited by the slot, and can move freely along the accommodating cavity. The relative position between the medicine box and the pump body can be adjusted by pulling the handle 32 to achieve docking and separation of the medicine box and the pump body.

[0054] In some embodiments of the present invention, a gear switching assembly is provided on both sides of the medicine box, and a card slot is provided at the position of the accommodating cavity corresponding to the two gear switching assemblies, and both ends of the handle 32 are respectively connected to a gear switching assembly.

[0055] Specifically, the two gear switching components are symmetrically arranged on both sides of the medicine box. The two gear switching components can be symmetrical about the central axis of the medicine box, so that when the handle 32 is pulled, the two ends of the handle 32 are respectively connected to a gear switching component, and the pulling force of the handle 32 can be evenly transmitted to both sides. When the position of the medicine box is adjusted, it can be more stable and not easy to shake or get stuck.

[0056] In some embodiments of the present invention, a first guide portion is provided on the wall surface of the accommodating cavity, and a second guide portion 36 is provided on the medicine box. The position of the first guide portion corresponds to the position of the second guide portion 36, and the first guide portion limits the second guide portion 36 from sliding along the second direction.

[0057] It can be understood that the first guide portion can be a groove or a protrusion, and correspondingly the second guide portion 36 is a protrusion that cooperates with the groove or a groove that cooperates with the protrusion. The extension direction of the first guide portion and the second guide portion 36 is set in the second direction, so that the medicine box can move stably along the second direction during the movement, the overall structure is more stable and the reliability is better. The setting of the guide portion enables the medicine box to be accurately docked with the corresponding pump body, reducing the occurrence of accidental failures during operation.

[0058] In some embodiments of the present invention, the pump body includes a motor 40, a gear group 41 and multiple cam groups 42. The motor 40 is connected to the gear group 41, and the cam group 42 is connected to the gear group 41. The cam groups 42 are arranged in a one-to-one correspondence with the medicine boxes. The cam groups 42 are used to squeeze the infusion tube 20 extending from the opening 11 to output the liquid medicine in the medicine bag 21.

[0059] Specifically, the medicine in the medicine bag 21 is connected to the external infusion tube 20 through the infusion tube 20. The infusion tube 20 is made of soft material. The medicine in the infusion tube 20 can be squeezed out by intermittently squeezing the infusion tube 20. This can be achieved by driving the cam group 42 by the motor 40. The motor 40 provides power, and the gear group 41 transmits the power of the motor 40 to the cam group 42. The cam group 42 includes an intermediate shaft and an input gear and multiple cams sleeved on the intermediate shaft. The cams are arranged at intervals, and the protruding directions of the cams are staggered. The gear group 41 is connected to the input gear, and the input gear drives the intermediate shaft to rotate. After the cams rotate, the output direction of the infusion tube 20 is squeezed at intervals, so that the medicine in the infusion tube 20 is squeezed and output along the output direction.

[0060] In some embodiments of the present invention, the injection pump also includes a switch 50, a rotating mechanism and a reset member 51. The switch 50 is connected to the housing 10 in a slidable manner, and the rotating mechanism is connected to the housing 10 in a rotatable manner. The switch 50 can drive the rotating mechanism to rotate by its own sliding to squeeze and cut off the infusion tube 20, and the reset member 51 drives the rotating mechanism to rotate in a direction away from the infusion tube 20.

[0061] It can be understood that the medicine bag 21 is used to store liquid medicine, and the infusion tube 20 is connected to the medicine bag 21. The infusion tube 20 can be arranged along the side and top of the medicine bag 21, or can be set along the top of the medicine bag 21, depending on the actual layout needs. The injection pump is also provided with a switch 50 component for cutting off the passage of the infusion tube 20. The principle is to cut off the passage by rotating the cutting mechanism. Specifically, a rotating mechanism is provided near the infusion tube 20. The rotating mechanism is rotatably connected to the housing 10. A slidable switch 50 is provided on the housing 10. When the switch 50 slides, the rotating mechanism is driven to rotate. When the rotating mechanism rotates to a certain angle, the rotating mechanism moves away from the infusion tube 20 until it completely leaves the infusion tube 20. The function of the reset member 51 is to keep the rotating mechanism squeezing the infusion tube 20 when the switch 50 is not slid, so that the infusion tube 20 is in a cut-off state.

[0062] In some embodiments of the present invention, the sliding direction of the switch 50 is set parallel to the infusion tube 20, the rotating mechanism is set between the switch 50 and the infusion tube 20, the rotating mechanism includes a rotating bracket 52 and a rotating shaft, the rotating shaft is connected to the shell 10, the first end of the rotating bracket 52 is set corresponding to the switch 50, the second end of the rotating bracket 52 is set corresponding to the infusion tube 20, the rotating bracket 52 is connected to the rotating shaft in a rotatable manner, and the reset member 51 includes a tension spring, and the two ends of the tension spring are respectively connected to the first end of the rotating bracket 52 and the shell 10.

[0063] Specifically, the rotating bracket 52 has an arc-shaped structure, and the middle part of the rotating bracket 52 is rotatably connected to the shell 10 through a rotating shaft. The switch 50 has a cubic structure. The switch 50 has a first extrusion slope at one end facing the rotating bracket 52, and correspondingly, the rotating bracket 52 has a second extrusion slope at one end corresponding to the switch 50. The tension of the tension spring is configured to drive the rotating bracket 52 to squeeze and cut off the infusion tube 20. When the switch 50 is toggled, the switch 50 slides along a preset track on the shell 10. The first extrusion slope of the switch 50 pushes the second extrusion slope of the rotating bracket 52, causing the rotating bracket 52 to rotate, and then the rotating bracket 52 squeezes one end of the infusion tube 20 and begins to move away from the infusion tube 20, so that the infusion tube 20 is opened, so that the infusion tube 20 can be used for drug delivery.

[0064] In some embodiments of the present invention, the housing 10 is provided with a mounting port 12, and the switch 50 is slidably arranged at the mounting port 12. The injection pump also includes a first limiting portion and a second limiting portion. The first limiting portion is provided at the mounting port 12, and the second limiting portion is provided at the switch 50. The first limiting portion and the second limiting portion cooperate to limit the switch 50.

[0065] It is understood that the housing 10 is provided with a mounting opening 12, and the switch 50 is embedded in the mounting opening 12. The switch 50 has an overall cubic structure, and the side of the switch 50 has a groove that can be snapped onto the mounting opening 12 to achieve a sliding connection. To facilitate the use of the switch 50, a limiting structure can be provided at the mounting opening 12. Through the cooperation of a first limiting portion and a second limiting portion, the switch 50 is limited to prevent accidental sliding of the switch 50 under the tension of the tension spring, thereby preventing abnormal infusion. Specifically, a protrusion can be provided on the mounting opening 12 and a groove can be provided on the switch 50. The two cooperate to maintain the position of the switch 50 when it slides to the open position of the infusion tube 20, preventing the switch 50 from being accidentally pulled by the tension spring and cutting the infusion tube 20.

[0066] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A drug injection pump, characterized in that: include: The housing defines a receiving cavity therein, and the receiving cavity has an opening; A plurality of medicine boxes are arranged in the accommodating cavity, wherein the medicine boxes include an infusion tube and a medicine bag, and the infusion tube is connected to the medicine bag; A plurality of drive mechanisms are provided in the accommodating cavity, the drive mechanisms being arranged in one-to-one correspondence with the medicine boxes, and the drive mechanisms being capable of driving the medicine boxes to move along the accommodating cavity, so as to drive the infusion tubes of the medicine boxes to extend or retract from the opening; a pump body, disposed corresponding to the opening, and configured to squeeze the infusion tube extending from the opening to discharge the liquid medicine in the medicine bag; A plurality of medicine boxes are arranged inside the accommodating cavity along a first direction, and the driving mechanism drives the medicine boxes to move along a second direction, wherein the first direction is perpendicular to the second direction; The medicine box is arranged in the accommodating cavity in a manner that can slide along the second direction. The driving mechanism includes a card slot, a gear switching component and a handle. The card slot is arranged on the wall of the accommodating cavity. The card slot includes a first gear slot and a second gear slot arranged in sequence along the second direction. The gear switching component is connected to the medicine box in a rotatable manner. The handle is connected to the gear switching component. The gear switching component can be engaged with or separated from the card slot by rotating itself. The gear switching assembly includes a rotating part, an elastic part and a movable part. The rotating part is connected to the medicine box in a rotatable manner. The rotating part is connected to the handle. The movable part includes a clamping part, a connecting part and an abutting part connected in sequence. The abutting part abuts against the rotating part. The rotating part can drive the abutting part to move away from the slot by its own rotation to drive the clamping part away from the slot. The two ends of the elastic part are respectively connected to the movable part and the medicine box. The elastic part can drive the clamping part to approach the slot.

2. The drug injection pump according to claim 1, characterized in that: A gear switching assembly is provided on both sides of the medicine box, the accommodating cavity is provided with the card slots corresponding to the two gear switching assemblies respectively, and the two ends of the handle are respectively connected to one gear switching assembly.

3. The drug injection pump according to claim 2, characterized in that: A first guide portion is provided on the wall surface of the accommodating cavity, and a second guide portion is provided on the medicine box. The position of the first guide portion corresponds to the position of the second guide portion, and the first guide portion restricts the second guide portion from sliding along the second direction.

4. The drug injection pump according to claim 1, characterized in that: The pump body includes a motor, a gear group and multiple cam groups. The motor is connected to the gear group, and the cam group is connected to the gear group. The cam groups are arranged in a one-to-one correspondence with the medicine boxes. The cam groups are used to squeeze the infusion tube extending from the opening to output the liquid medicine in the medicine bag.

5. The drug injection pump according to any one of claims 1 to 4, characterized in that: The drug injection pump also includes a switch, a rotating mechanism and a reset member. The switch is connected to the shell in a slidable manner, and the rotating mechanism is connected to the shell in a rotatable manner. The switch can drive the rotating mechanism to rotate by sliding itself to squeeze and cut off the infusion tube, and the reset member drives the rotating mechanism to rotate in a direction away from the infusion tube.

6. The drug injection pump according to claim 5, characterized in that: The sliding direction of the switch is arranged parallel to the infusion tube, the rotating mechanism is arranged between the switch and the infusion tube, the rotating mechanism includes a rotating bracket and a rotating shaft, the rotating shaft is connected to the shell, the first end of the rotating bracket is arranged corresponding to the switch, the second end of the rotating bracket is arranged corresponding to the infusion tube, the rotating bracket is rotatably connected to the rotating shaft, and the reset member includes a tension spring, and the two ends of the tension spring are respectively connected to the first end of the rotating bracket and the shell.

7. The drug injection pump according to claim 6, characterized in that: The shell is provided with a mounting port, and the switch is slidably arranged on the mounting port. The injection pump also includes a first limiting portion and a second limiting portion. The first limiting portion is provided at the mounting port, and the second limiting portion is provided at the switch. The first limiting portion and the second limiting portion cooperate to limit the switch.

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