Roller assembly and nutrition pump

Abstract

The invention provides a roller assembly and a nutrition pump, the roller assembly comprises a shell and a locking structure connected to the shell, and the locking structure comprises a switch piece and a locking piece which are matched with each other; wherein the locking piece is configured to be in an unlocking state or a locking state when the switch piece is triggered. According to the roller assembly and the nutrition pump, the roller assembly is easy to assemble and disassemble and convenient to clean and maintain.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to a roller assembly and a nutrition pump. Background Art

[0002] The nutrition pump is a nutrition infusion pump that can be used for nasogastric feeding. It can input water, nutrient solution and homemade rice milk of a certain concentration into the patient through the nasogastric tube to improve the patient's nutritional status.

[0003] The nutrition pump includes a nutrition pump main unit and a roller installed on the nutrition pump main unit. The roller is used to wrap around the infusion tube and rotate under the drive of the driving device in the nutrition pump main unit to promote the flow of liquid in the infusion tube. As an important functional component of the nutrition pump, the roller needs to be frequently removed from the nutrition pump main unit during long-term use to clean or repair and replace the roller, and then reinstall the roller on the nutrition pump main unit.

[0004] However, the existing rollers are connected to the nutrition pump host through fasteners such as screws, which is inconvenient to install and disassemble, and brings difficulties to cleaning and maintenance. Summary of the invention

[0005] In order to solve at least one of the problems mentioned in the background technology, the present application provides a roller assembly and a nutrition pump, wherein the roller assembly is easy to assemble and disassemble and is convenient for cleaning and maintenance.

[0006] One aspect of the present application provides a roller assembly, including a shell and a locking structure connected to the shell, the locking structure including a matching switch member and a locking member; wherein the locking member is configured to be in an unlocked state or a locked state when the switch member is triggered.

[0007] In a possible implementation, a positioning groove is provided on one side of the housing, and the locking member is configured to extend into the positioning groove in a locked state, and to move in a direction away from a center line of the positioning groove in an unlocked state.

[0008] In a possible implementation, a receiving cavity is provided in the housing, and the locking structure is installed in the receiving cavity;

[0009] The shell is also provided with a first opening and a second opening respectively connected with the accommodating cavity, the switch member is movably arranged in the first opening, the second opening is connected with the positioning groove, and the locking member is movably arranged in the second opening.

[0010] In a possible implementation, the switch member includes a pressing portion and a driving portion connected to each other, the pressing portion is movably disposed in the first opening, and the driving portion abuts against the locking member to drive the locking member to move along a side away from the second opening.

[0011] In a possible implementation, the locking member is provided with a guide groove, and the driving part is movably connected in the guide groove;

[0012] The groove wall of the guide groove has a first guide portion which is arranged obliquely, and the driving portion has a second guide portion which is arranged obliquely. The first guide portion cooperates with the second guide portion to drive the locking member to move along the side away from the second opening.

[0013] In a possible implementation, the locking structure further includes a first elastic member, two ends of which are respectively in contact with the switch member and an inner wall of the accommodating cavity, and the first elastic member is configured to drive the switch member to move toward one side of the first opening.

[0014] In a possible implementation, the locking structure further includes a second elastic member, two ends of which are respectively abutted against the locking member and the inner wall of the accommodating cavity, and the second elastic member is configured to drive the locking member to move toward one side of the second opening.

[0015] In a possible implementation, the housing includes a roller body and an end cover that are detachably connected, and the accommodating cavity is located between the roller body and the end cover;

[0016] The first opening is arranged on the end cover, and the positioning groove is arranged on a side of the roller body away from the end cover.

[0017] In a possible implementation manner, a side wall of the roller body is provided with an installation opening communicated with the accommodating cavity, and a detachable baffle is provided at the installation opening.

[0018] In a possible embodiment, the roller assembly further includes a plurality of rollers, the roller body includes a main body portion and a fixed portion connected to each other, the plurality of rollers are located between the fixed portion and the end cover, and are circumferentially spaced around the main body portion, and the rollers can rotate around their own rotating axes.

[0019] In a possible implementation manner, a buckle is provided on the end cover, and a slot adapted to the buckle is provided on the roller body.

[0020] In a possible implementation manner, an avoidance surface is provided at one end of the locking member extending into the positioning groove.

[0021] Another aspect of the present application provides a nutrition pump, comprising a pump main unit and a roller assembly as described above, wherein the roller assembly is detachably connected to the pump main unit.

[0022] In a possible implementation manner, a pump main shaft is provided on the pump host, and the locking member of the roller assembly is connected to the pump main shaft in a locked state.

[0023] In a possible implementation manner, a clamping groove is provided on the pump main shaft, and the locking member of the roller assembly extends into the clamping groove when in a locked state.

[0024] In one possible embodiment, the roller assembly has a positioning groove that is plugged into the pump main shaft, the inner wall of the positioning groove has a first positioning surface, and the outer wall of the pump main shaft has a second positioning surface. The first positioning surface cooperates with the second positioning surface so that the pump main shaft drives the roller assembly to rotate.

[0025] In a possible implementation manner, a detection component is further provided on the pump host, and the detection component detects the state of the roller assembly and sends a signal to the control unit of the pump host when the roller assembly is abnormal.

[0026] The roller assembly and nutrition pump provided by the present application are characterized in that the roller assembly is detachably mounted on the pump main unit of the nutrition pump, and the roller assembly is connected to a locking structure on its housing, and the locking structure is provided with a switch member and a locking member that cooperate with each other, and the switch member can be triggered by an operator. When the switch member is not triggered, the locking member is in a locked state, and the roller assembly is locked on the pump main unit; when the switch member is triggered, the locking member is in an unlocked state, and the roller assembly is disconnected from the pump main unit, and the roller assembly can be removed from the pump main unit. In this way, the connection method between the roller assembly and the pump main unit is more flexible, and the installation and removal of the roller assembly on the pump main unit do not require the use of tools, and the assembly and removal efficiency of the roller assembly is higher, which is convenient for cleaning and maintenance of the roller assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the structure of a nutrition pump provided in an embodiment of the present application;

[0029] Figure 2 for Figure 1 The structural diagram of the nutrition pump after removing the infusion component;

[0030] Figure 3 A structural schematic diagram of a roller assembly provided in an embodiment of the present application from one perspective;

[0031] Figure 4 for Figure 3 A structural schematic diagram of the roller assembly from another perspective;

[0032] Figure 5 for Figure 3 A schematic diagram of the exploded structure of the roller assembly in FIG.

[0033] Figure 6 for Figure 3A cross-sectional view of the roller assembly in FIG. 1 when the locking member is in a locked state;

[0034] Figure 7 for Figure 3 A cross-sectional view of the roller assembly in FIG. 1 when the locking member is in an unlocked state;

[0035] Figure 8 A diagram showing the matching structure of a switch member and a locking member provided in an embodiment of the present application;

[0036] Fig. 9 for Figure 3 The roller assembly in Figure 5 Sectional view along line AA.

[0037] Description of reference numerals:

[0038] 1- Nutrition pump;

[0039] 100- pump host; 200- roller assembly; 300- infusion assembly; 400- pump door;

[0040] 110-support pad; 120-display screen; 130-button; 140-indicator light; 150-pump spindle; 210-housing; 220-switch module; 230-locking module;

[0041] 151-second clamping portion; 151a-clamping groove; 152-second positioning surface; 211-roller body; 212-end cover; 213-roller; 221-switch member; 222-first elastic member; 231-locking member; 232-second elastic member;

[0042] 1511-second limiting surface; 2101-positioning groove; 2101a-positioning portion; 2111-main body; 2112-fixing portion; 2121-first opening; 2122-buckle; 2131-rotating shaft; 2211-pressing portion; 2212-driving portion; 2311-guide groove; 2312-first clamping portion; 2312a-clamping boss;

[0043] 21011-second opening; 21012-positioning boss; 21013-first positioning surface; 21111-installation opening; 21112-baffle; 21113-slot; 22121-second guide portion; 22122-abutment portion; 23111-first guide portion; 23112-vertical portion; 23121-first limiting surface; 23122-avoidance surface;

[0044] 21111a-Guide groove. DETAILED DESCRIPTION

[0045] Improving the nutritional status of patients is the basic condition for disease treatment. Clinical nutrition is divided into enteral nutrition and parenteral nutrition. Enteral nutrition is more conducive to the metabolism and utilization of physiological nutrients in the human body. It can safely and effectively promote and maintain the complete gastrointestinal structure and function, protect the gastric mucosal barrier, reduce complications, and reduce treatment costs.

[0046] In clinic, water, nutrient solution and homemade rice milk of a certain concentration are usually delivered to patients through nutrition pumps (also known as enteral nutrition pumps) to provide nutrition to patients. As an important functional component of the nutrition pump, the roller needs to be frequently disassembled and cleaned from the nutrition pump host, or needs to be repaired and replaced. After cleaning (or repaired and replaced), the roller needs to be reinstalled on the nutrition pump host.

[0047] In existing nutrition pumps, the roller is fixedly connected to the nutrition pump main body by fasteners such as screws and bolts, and a specific tool or a general tool is required to install the roller on the nutrition pump main body or remove the roller from the nutrition pump main body. However, this method is not convenient for installing and removing the roller, which will cause inconvenience to users and maintenance personnel. Without tools, it is impossible to clean or maintain the roller.

[0048] In view of this, an embodiment of the present application provides a roller assembly and a nutrition pump, wherein the roller assembly is detachably mounted on a pump main unit of the nutrition pump, and the roller assembly is connected to a locking structure on its housing, and the locking structure is provided with a switch member and a locking member that cooperate with each other, and the switch member can be triggered by an operator. When the switch member is not triggered, the locking member is in a locked state, and the roller assembly is locked on the pump main unit; when the switch member is triggered, the locking member is in an unlocked state, and the roller assembly is disconnected from the pump main unit, and the roller assembly can be removed from the pump main unit. In this way, the connection method between the roller assembly and the pump main unit is more flexible, and the installation and removal of the roller assembly on the pump main unit do not require the use of tools, and the assembly and removal efficiency of the roller assembly is higher, which facilitates the cleaning and maintenance of the roller assembly.

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] Figure 1 A schematic diagram of the structure of a nutrition pump provided in an embodiment of the present application; Figure 2 for Figure 1 The structure diagram of the nutrition pump after removing the infusion component. Figure 1 and Figure 2As shown, the nutrition pump 1 includes a pump main unit 100, a roller assembly 200, an infusion assembly 300 and a pump door 400. The pump main unit 100 is the main structure of the nutrition pump 1. The roller assembly 200 and the infusion assembly 300 are detachably mounted on the pump main unit 100, and the pump door 400 is movably connected to the pump main unit 100.

[0051] Among them, one side surface of the pump main unit 100 can be an operating surface, and the operator can operate the pump main unit 100 facing the operating surface of the pump main unit 100. The roller assembly 200 and the infusion assembly 300 can be installed on the operating surface of the pump main unit 100, and the pump door 400 can also be covered on the operating surface of the pump main unit 100.

[0052] For example, the pump main unit 100 can be erected on a support base such as a desktop or a support frame, and a flexible support pad 110 can be provided on the bottom surface of the pump main unit 100 to avoid hard contact between the pump main unit 100 and the support base, increase the friction between the pump main unit 100 and the support base, ensure the stability of the pump main unit 100, and reduce the wear or scratch on the bottom surface of the pump main unit 100. One side surface of the pump main unit 100 can be an operating surface, and the operating surface can be perpendicular to its bottom surface, for example.

[0053] Combination Figure 1 and Figure 2 As shown, one side of the operation surface of the pump main unit 100 may be a display control area, and the other side may be an accessory installation area. The display control area is mainly used to display relevant information of the pump main unit 100, and the operator can operate in the display control area to control the operating state of the pump main unit 100. The accessory installation area is used to install some accessories that cooperate with the pump main unit 100. These accessories and the pump main unit 100 together constitute the nutrition pump 1 to realize the function of the nutrition pump 1 to transport nutrients.

[0054] The display control area may be provided with a display screen 120, buttons 130, and indicator lights 140. The display screen 120 may occupy most of the display control area. The buttons 130 and indicator lights 140 may be arranged on the sides of the display screen 120. The display screen 120 is used to display information such as operating parameters and function options of the nutrient pump 1. The buttons 130 may include a power button, a return button, and the like. The indicator lights 140 may include operating indicators, alarm indicators, and the like.

[0055] The aforementioned roller assembly 200 and infusion assembly 300 can be installed in the accessory installation area, and the pump door 400 can be connected to the side wall of the pump main unit 100 through a rotating shaft and located on the side where the accessory installation area is located. The pump door 400 can only cover the accessory installation area to protect the accessories installed on the accessory installation area, while the display control area is exposed outside the pump door 400, so that the operator can observe the display screen 120 and operate the pump main unit 100. Exemplarily, the pump door 400 can be a transparent part, so that the working status of the accessories in the accessory installation area can be observed through the pump door 400, so as to observe the operating status of the nutrition pump 1 in real time.

[0056] Combination Figure 1 and Figure 2 As shown, the roller assembly 200 can rotate under the drive of the pump main unit 100, and the pipeline of the infusion assembly 300 is arranged around the outer periphery of the roller assembly 200. The roller assembly 200 generates a certain pressure on the pipeline of the infusion assembly 300, so that the pipeline of the infusion assembly 300 is in a stretched state. Among them, a driving device can be provided in the pump main unit 100, and the driving force of the driving device can be transmitted to the roller assembly 200, and the roller assembly 200 rotates under the drive of the driving device.

[0057] When the pump host 100 drives the roller assembly 200 to rotate, the roller assembly 200 generates a driving force on the fluid in the pipeline of the infusion assembly 300, pushing the fluid in the infusion assembly 300 to flow along the pipeline, so as to deliver the nutrients in the infusion assembly 300 to the patient; when the roller assembly 200 stops rotating, the pipeline of the infusion assembly 300 is subjected to a large pressure from the roller assembly 200, the fluid passage in the pipeline is equivalent to being blocked, and the fluid in the pipeline stops flowing forward, and the nutrition pump 1 stops delivering nutrients to the patient.

[0058] The roller assembly 200 and the connection structure between the roller assembly 200 and the pump host 100 are described in detail below.

[0059] Figure 3 A structural schematic diagram of a roller assembly provided in an embodiment of the present application from one perspective; Figure 4 for Figure 3 A structural schematic diagram of the roller assembly from another perspective; Figure 5 for Figure 3 Schematic diagram of the exploded structure of the roller assembly in FIG.

[0060] Reference Figure 3 and Figure 4 As shown, in this embodiment, the roller assembly 200 includes a shell 210 and a locking structure. The shell 210 is the main supporting structure of the roller assembly 200. The roller assembly 200 is connected to the pump host 100 by means of the shell 210. The locking structure is movably connected to the shell 210, and the locking structure has a locked state and an unlocked state.

[0061] When the locking structure is in a locked state, the roller assembly 200 is connected to the pump main unit 100, which is equivalent to locking the roller assembly 200 on the pump main unit 100; when the locking structure is in an unlocked state, the roller assembly 200 is disconnected from the pump main unit 100, which is equivalent to separating the roller assembly 200 from the pump main unit 100, and the roller assembly 200 can be moved relative to the pump main unit 100 to facilitate the installation of the roller assembly 200 on the pump main unit 100, or the removal of the roller assembly 200 from the pump main unit 100.

[0062] Among them, combined Figures 3 to 5 As shown, the locking structure may include a switch member 221 and a locking member 231 that cooperate with each other. The switch member 221 is for the operator to operate and can be triggered by the operator. The locking member 231 is used to cooperate with the pump host 100 to put the locking member 231 in a locked state or an unlocked state.

[0063] When the switch 221 is triggered, the state of the locking member 231 can be changed to switch the locking member 231 between the locked state and the unlocked state. For example, when the roller assembly 200 is assembled on the pump main unit 100, under normal circumstances, the locking member 231 is in a state of connection with the pump main unit 100, or the locking member 231 is in a locked state, and the roller assembly 200 is stably and reliably connected to the pump main unit 100; when the switch 221 is triggered, the switch 221 can drive the locking member 231 to move to separate from the pump main unit 100, so that the locking member 231 is in an unlocked state, and the roller assembly 200 can move relative to the pump main unit 100; after the switch 221 is untriggered, or when the switch 221 is triggered again, the locking member 231 returns to the state of connection with the pump main unit 100, and the locking member 231 returns to the locked state.

[0064] Compared with the prior art method in which the roller is fixedly connected to the nutrition pump host by fasteners such as screws and bolts, this embodiment uses a movably connected locking structure on the housing 210 of the roller assembly 200. The locking structure cooperates with the locking member 231 by setting a switch member 221 to control the connection state between the roller assembly 200 and the pump host 100. When the locking member 231 is in the locked state, the roller assembly 200 is connected to the pump host 100. When it is necessary to separate the roller assembly 200 from the pump host 100, the operator only needs to trigger the switch member 221 to move the locking member 231 to the unlocked state, thereby separating the roller assembly 200 from the pump host 100.

[0065] With such arrangement, the connection method between the roller assembly 200 and the pump main unit 100 is more flexible. When installing and removing the roller assembly 200 on the pump main unit 100, no specific tools or general tools are required. The assembly and disassembly efficiency of the roller assembly 200 on the pump main unit 100 is higher, and it is convenient to clean, maintain, repair, and replace the roller assembly 200.

[0066] In addition, when the roller assembly 200 is installed on the pump main unit 100, in order to perform real-time detection of the in-situ status of the roller assembly 200, in the present embodiment, a detection member may also be provided on the pump main unit 100, and the detection member is used to detect the status of the roller assembly 200, and when the roller assembly 200 is abnormal, for example, the rotation speed of the roller assembly 200 is abnormal, the distance between the roller assembly 200 and the operating surface of the pump main unit 100 is too large, or even the roller assembly 200 falls off the pump main unit 100, a signal is sent to the control unit of the pump main unit 100. After receiving the signal, the control unit can autonomously control the pump main unit 100 to shut down and send out an alarm signal (for example, by illuminating the alarm indicator light 140, or by sounding the alarm through a buzzer, or by sounding and light at the same time).

[0067] Exemplarily, the detection component provided on the pump host 100 can be a device such as a Hall sensor, an infrared sensor, an ultrasonic sensor, a photoelectric sensor or a micro switch, and the roller assembly 200 can be installed with magnetic components, shading components and other components. The detection component can detect signals such as the spacing, spacing change, position change, etc. of the roller assembly 200 relative to the pump host 100, so as to monitor the in-situ status of the roller assembly 200 in real time.

[0068] Reference Figure 5 As shown, specifically, a pump main shaft 150 extends from the operating surface of the pump main unit 100, and the roller assembly 200 is connected to the pump main shaft 150, and the roller assembly 200 is driven to rotate by the pump main shaft 150. It should be noted that the pump main shaft 150 extending from the operating surface of the pump main unit 100 can be connected to a driving device in the pump main unit 100, and the driving device drives the pump main shaft 150 to rotate, and the pump main shaft 150 drives the roller assembly 200 to rotate.

[0069] In order to make the roller assembly 200 cooperate with the pump main shaft 150 on the pump main body 100, a positioning groove 2101 may be provided on the housing 210 of the roller assembly 200 (see Figure 4 ), the notch of the positioning groove 2101 is located on the side surface of the roller assembly 200 facing the pump main body 100, and the positioning groove 2101 extends in a direction away from the pump main body 100. The roller assembly 200 is sleeved on the outside of the pump main shaft 150 through the positioning groove 2101, or in other words, the pump main shaft 150 is inserted into the positioning groove 2101 of the roller assembly 200, so that the roller assembly 200 is connected to the pump main shaft 150.

[0070] Continue to refer to Figure 5 In order to make the pump main shaft 150 drive the roller assembly 200 to rotate stably, in this embodiment, the inner side wall of the positioning groove 2101 may have a first positioning surface 21013 (see Figure 4 As shown in the figure, the outer side wall of the pump main shaft 150 may have a second positioning surface 152 to match it. The first positioning surface 21013 in the roller assembly 200 cooperates with the second positioning surface 152 on the pump main shaft 150 to position the roller assembly 200 on the pump main shaft 150, so that the roller assembly 200 rotates synchronously with the pump main shaft 150, thereby ensuring the stable operation of the roller assembly 200.

[0071] Exemplarily, the first positioning surface 21013 in the positioning groove 2101 may be a vertical plane extending along the axial direction of the pump main shaft 150, and correspondingly, the second positioning surface 152 on the pump main shaft 150 may be a plane section. The number of the first positioning surfaces 21013 in the positioning groove 2101 may be one or more than two, and correspondingly, the number of the second positioning surfaces 152 on the pump main shaft 150 may also be one or more than two. For example, the cross section of the positioning groove 2101 may be D-shaped or waist-shaped, and the cross section of the pump main shaft 150 may also be D-shaped or waist-shaped.

[0072] In this regard, the locking member 231 can cooperate with the pump main shaft 150. When the locking member 231 is in a locked state, the locking member 231 extends into the positioning groove 2101 and is connected to the pump main shaft 150 to lock the roller assembly 200 on the pump main shaft 150, so that the roller assembly 200 is stably connected to the pump main shaft 150, and the pump main shaft 150 can drive the roller assembly 200 to rotate; when the locking member 231 is in an unlocked state, the locking member 231 can move in a direction away from the center line (e.g., the central axis) of the positioning groove 2101 to disengage the locking member 231 from the connection with the pump main shaft 150, so that the roller assembly 200 is separated from the pump main shaft 150, so as to realize the installation and disassembly of the roller assembly 200 on the pump main unit 100.

[0073] As for the triggering method of the switch member 221, the switch member 221 can be triggered by pressing, toggling or other manual operation methods. In other words, the switch member 221 can be a pressing member, a toggling member or other structural member that requires manual operation. When the switch member 221 is not manually operated, the locking member 231 is in a locked state. When the switch member 221 is triggered (for example, the pressing member is pressed or the toggling member is toggled), the switch member 221 drives the locking member 231 to move to an unlocked state.

[0074] Of course, the state of the locking member 231 can also be controlled to change by other means. In this case, the switch member 221 can be an electronic switch, and the control signal is sent by triggering the switch member 221, thereby controlling the locking member 231 to switch between the locked state and the unlocked state. In this regard, the locking member 231 can be designed as an electrically controlled locking method. For example, the locking member 231 can be automatically driven to move by an electrically controlled connecting rod, gear or other driving structure, or the locking member 231 can be driven to move relative to the pump main shaft 150 by changing the magnetism of the locking member 231.

[0075] The structure and working principle of the locking structure of this embodiment are described below by taking the triggering mode of the switch member 221 as a press-type manual operation mode as an example.

[0076] Figure 6 for Figure 3 A cross-sectional view of the roller assembly in FIG. 1 when the locking member is in a locked state; Figure 7 for Figure 3 Cross-sectional view of the roller assembly in FIG. 1 with the locking member in the unlocked state. Figure 6 or Figure 7 As shown, the housing 210 of the roller assembly 200 has a accommodating cavity, and the locking structure is installed in the accommodating cavity. The locking structure can be limited by the housing 210 to ensure the position of the locking structure and the accuracy of its movement, and to facilitate the matching and connection between the locking structure and the pump main shaft 150 inserted into the roller assembly 200.

[0077] Exemplarily, a positioning portion 2101a is provided in the housing 210 of the roller assembly 200, and the positioning portion 2101a can extend from one side of the roller assembly 200 facing the pump main unit 100 to the other side of the roller assembly 200, and a receiving cavity is formed between the positioning portion 2101a and the outer side wall of the housing 210. The positioning portion 2101a is, for example, located on the central axis of the roller assembly 200, and the aforementioned positioning groove 2101 can be provided on the positioning portion 2101a, or in other words, the positioning portion 2101a forms the groove wall of the positioning groove 2101, and the pump main shaft 150 is inserted into the positioning groove 2101, which is equivalent to the positioning portion 2101a being sleeved on the pump main shaft 150.

[0078] Combination Figure 5 and Figure 6 As shown, the housing 210 is provided with a first opening 2121, the first opening 2121 is communicated with the accommodating cavity, and the switch element 221 is inserted into the first opening 2121, or in other words, the switch element 221 extends into the accommodating cavity through the first opening 2121. Figure 6 and Figure 7As shown, a second opening 21011 is further provided on the shell 210, and the second opening 21011 is connected to the accommodating cavity, and the second opening 21011 is connected to the positioning groove 2101. The second opening 21011 can, for example, be provided on the groove wall of the positioning groove 2101, or, in other words, the second opening 21011 is provided on the side wall of the positioning portion 2101a; the locking member 231 can be movably inserted into the second opening 21011, that is, the locking member 231 can pass through the second opening 21011 and extend into the positioning groove 2101 to be connected to the pump main shaft 150, and the locking member 231 can also move in a direction away from the positioning groove 2101 to disengage from the pump main shaft 150.

[0079] Taking the switch member 221 as a pressing member as an example, in order to facilitate the operation of the switch member 221 and also facilitate the switch member 221 to drive the locking member 231 to move, the switch member 221 can be movably connected to the top of the shell 210. The switch member 221 can, for example, move along the axial direction of the shell 210. When the switch member 221 is pressed down, the switch member 221 moves toward the pump main unit 100 and drives the locking member 231 to move in a direction away from the center line of the positioning groove 2101 (the pump main shaft 150), so that the locking member 231 moves to an unlocked state.

[0080] In this regard, the first opening 2121 on the housing 210 can be opened at the top of the housing 210, and the switch member 221 extends through the first opening 2121 into the accommodating cavity of the housing 210, and the switch member 221 is exposed in the first opening 2121, so that the operator can press it. Exemplarily, when the switch member 221 is in a natural state, or when the switch member 221 is not pressed down, the switch member 221 can protrude from the top of the housing 210 to reserve sufficient operating space for the operator.

[0081] The locking member 231 may be installed in the accommodating cavity of the housing 210, and the locking member 231 may move in a direction perpendicular to the axial direction of the housing 210, for example, the locking member 231 may move in the radial direction of the pump main shaft 150 (a slide groove extending in the radial direction of the pump main shaft 150 may be arranged in the accommodating cavity of the housing 210, and the locking member 231 is installed in the slide groove to guide the locking member 231 to move in the radial direction of the pump main shaft 150). The locking member 231 may move toward the pump main shaft 150 in the radial direction of the pump main shaft 150 and be connected to the pump main shaft 150, so that the locking member 231 is in a locked state; the locking member 231 may also move away from the pump main shaft 150 in the radial direction of the pump main shaft 150 and be disengaged from the pump main shaft 150, so that the locking member 231 is in an unlocked state.

[0082] In addition, in order to ensure a smooth connection between the roller assembly 200 and the pump main shaft 150, at least two locking members 231 may be provided in the housing 210 of the roller assembly 200. The locking members 231 may be arranged at intervals along the circumference of the accommodating cavity (the circumference of the pump main shaft 150). Each locking member 231 is connected to a different circumferential position of the pump main shaft 150 to ensure a stable and secure connection between the roller assembly 200 and the pump main shaft 150.

[0083] Taking the case where two locking members 231 are provided in the housing 210 of the roller assembly 200 as an example, the two locking members 231 can be symmetrically arranged, or in other words, the two locking members 231 are located in the same radial direction of the pump main shaft 150; taking the case where more than three locking members 231 are provided in the housing 210 of the roller assembly 200 as an example, the locking members 231 can be evenly spaced along the circumference of the pump main shaft 150.

[0084] Figure 8 This is a diagram of the matching structure of the switch member and the locking member provided in the embodiment of the present application. Figure 8 As shown, the switch member 221 may include a pressing portion 2211 and a driving portion 2212. The pressing portion 2211 may be the main structure of the switch member 221, and the driving portion 2212 is connected to the pressing portion 2211. For example, the driving portion 2212 is integrally formed on the pressing portion 2211. Exemplarily, the pressing portion 2211 may be a pressing sleeve (see FIG. 21 ) that is inserted into the first opening 2121 of the housing 210 and sleeved outside the positioning portion 2101a. Figure 6 or Figure 7 ), the driving portion 2212 can be connected to the bottom end of the pressing portion 2211, the driving portion 2212 can correspond to the locking member 231 one by one, and the driving portion 2212 can abut against the locking member 231 to drive the locking member 231 to move.

[0085] Specifically, the locking member 231 may be provided with a guide groove 2311, which extends from one side surface of the locking member 231 facing the switch member 221 to the other side surface of the locking member 231, or in other words, the notch of the guide groove 2311 may be located on the side surface of the locking member 231 facing the switch member 221. Exemplarily, the guide groove 2311 may extend to the two side surfaces that pass through the locking member 231, that is, the guide groove 2311 is a through groove provided on the locking member 231. The driving portion 2212 of the switch member 221 may be movably connected in the guide groove 2311, or in other words, the driving portion 2212 of the switch member 221 may move along the guide groove 2311 to drive the locking member 231 to move.

[0086] Among them, the groove wall of the guide groove 2311 has a first guide portion 23111 that is inclined, and the first guide portion 23111 extends from the side surface of the locking member 231 toward the switch member 221 to the other side surface of the locking member 231, and the first guide portion 23111 is inclined relative to the axial direction of the pump main shaft 150; the driving portion 2212 of the switch member 221 has a second guide portion 22121, the second guide portion 22121 faces the first guide portion 23111, and the second guide portion 22121 matches the first guide portion 23111. In other words, the second guide portion 22121 is also inclined relative to the axial direction of the pump main shaft 150, and the second guide portion 22121 can be fitted with the first guide portion 23111, and the second guide portion 22121 slides along the first guide portion 23111 to drive the locking member 231 to move.

[0087] Reference Figure 6 As shown, when the switch member 221 is not pressed, the locking member 231 is at the position closest to the pump main shaft 150, and the locking member 231 is connected to the pump main shaft 150, and the locking member 231 is in a locked state, so that the roller assembly 200 can be fixed on the pump main shaft 150. Figure 7 As shown, when the switch member 221 is pressed down, the driving portion 2212 of the switch member 221 moves downward toward the locking member 231, and the driving portion 2212 extends into the guide groove 2311 of the locking member 231, and the second guide portion 22121 of the driving portion 2212 slides along the first guide portion 23111 of the guide groove 2311 to drive the locking member 231 to move away from the pump main shaft 150, so that the locking member 231 is disengaged from the pump main shaft 150, and then the roller assembly 200 is separated from the pump main shaft 150.

[0088] Combination Figure 6 and Figure 8 As shown, as an embodiment, the first guide portion 23111 on the locking member 231 can be set on a side groove wall of the guide groove 2311 away from the pump main shaft 150, and the first guide portion 23111 is inclined toward the pump main shaft 150 from one end of the first guide portion 23111 toward the pressing member to the other end of the first guide portion 23111; correspondingly, the second guide portion 22121 on the switch member 221 can be set on a side surface of the driving portion 2212 away from the pump main shaft 150, and the second guide portion 22121 is inclined in a direction away from the pump main shaft 150 from one end of the second guide portion 22121 toward the locking member 231 to the other end of the second guide portion 22121, and the second guide portion 22121 is in contact with the first guide portion 23111.

[0089] As another embodiment, the first guide portion 23111 on the locking member 231 can be set on a side groove wall of the guide groove 2311 close to the pump main shaft 150, and the first guide portion 23111 is inclined toward the pump main shaft 150 from one end of the first guide portion 23111 toward the switch member 221 to the other end of the first guide portion 23111; correspondingly, the second guide portion 22121 on the switch member 221 can be set on a side surface of the driving portion 2212 toward the pump main shaft 150, and the second guide portion 22121 is inclined in a direction away from the pump main shaft 150 from one end of the second guide portion 22121 toward the locking member 231 to the other end of the second guide portion 22121, and the second guide portion 22121 is in contact with the first guide portion 23111.

[0090] Taking the first guide portion 23111 on the locking member 231 as an example, which is disposed on a side of the guide groove 2311 away from the pump main shaft 150, Figure 6 As shown, the groove wall on one side of the guide groove 2311 away from the pump main shaft 150 may also have a vertical portion 23112, the vertical portion 23112 may be located on the side of the first guide portion 23111 away from the switch 221, and the vertical portion 23112 may extend along the axial direction of the pump main shaft 150. The vertical portion 23112 makes the groove wall on this side of the guide groove 2311 no longer a smooth wall surface, and the vertical portion 23112 may limit the minimum groove width of the guide groove 2311, and may prevent the second guide portion 22121 of the switch 221 from continuing to slide along the locking member 231, so as to limit the moving range of the locking member 231 and ensure the stability and reliability of the locking member 231.

[0091] In addition, when the first guide portion 23111 of the locking member 231 is arranged on a side wall of the guide groove 2311 away from the pump main shaft 150, the side wall of the guide groove 2311 close to the pump main shaft 150 can extend along the axial direction of the pump main shaft 150. On the one hand, it is convenient to process the side wall of the guide groove 2311. On the other hand, the side of the guide groove 2311 close to the switch member 221 is a flared structure, which makes it easy for the driving portion 2212 of the switch member 221 to extend into the guide groove 2311.

[0092] Continue to refer to Figure 6 or Figure 7 The locking structure may further include a first elastic member 222, which may abut between the switch member 221 and the inner wall of the accommodating cavity. For example, the first elastic member 222 is located inside the switch member 221 and is sleeved outside the positioning portion 2101a. One end of the first elastic member 222 abuts against the inner top wall of the switch member 221, and the other end of the first elastic member 222 abuts against the positioning boss 21012 extending from the outer wall of the positioning portion 2101a. The first elastic member 222 is used to drive the switch member 221 to move toward the side where the first opening 2121 on the housing 210 is located.

[0093] Specifically, when the switch member 221 is not pressed, under the elastic force of the first elastic member 222, the switch member 221 is located away from the locking member 231, and the locking member 231 is in a locked state (see Figure 6 ); When the switch member 221 is pressed down, the first elastic member 222 is compressed, the switch member 221 moves toward the locking member 231, and the driving portion 2212 of the switch member 221 moves along the guide groove 2311 of the locking member 231, driving the locking member 231 to move away from the pump main shaft 150, so that the locking member 231 is converted from the locked state to the unlocked state (see Figure 7 ); When the external force pressing the switch member 221 is eliminated, the switch member 221 moves toward the first opening 2121 (the switch member 221 moves away from the locking member 231) under the driving action of the elastic force generated by the compression of the first elastic member 222, and the driving portion 2212 of the switch member 221 gradually disengages from the guide groove 2311 of the locking member 231, and the locking member 231 can move toward the pump main shaft 150 and return to the locked state (see Figure 6 ).

[0094] In addition, in order to restrict the switch member 221 in the accommodating cavity of the housing 210, the switch member 221 may also be provided with an abutting portion 22122. When the switch member 221 is in a natural state (not triggered), the abutting portion 22122 abuts against the inner wall surface of the housing 210. For example, the abutting portion 22122 abuts against the inner wall surface of the outer periphery of the first opening 2121 to prevent the switch member 221 from slipping out of the housing 210. Exemplarily, at least part of the structure of the driving portion 2212 may protrude from the outer side wall of the pressing portion 2211, the abutting portion 22122 may be located at the top of the driving portion 2212, and the abutting portion 22122 is located at the outer periphery of the pressing portion 2211. The pressing portion 2211 may pass through the first opening 2121, and the abutting portion 22122 abuts against the inner wall of the outer periphery of the first opening 2121.

[0095] Similar to the first elastic member 222 between the switch member 221 and the positioning portion 2101a, the locking structure may further include a second elastic member 232, which may abut between the locking member 231 and the inner wall of the accommodating chamber. For example, one end of the second elastic member 232 abuts against one side of the locking member 231 (towards the inner wall of the shell 210), and one end of the second elastic member 232 abuts against the inner wall of the shell 210 (the inner wall of the accommodating chamber). The second elastic member 232 is used to drive the locking member 231 to move toward the side where the second opening 21011 (on the positioning portion 2101a) is located. In other words, the second elastic member 232 is used to drive the locking member 231 to move toward the pump main shaft 150.

[0096] Specifically, when the switch member 221 is not pressed, under the elastic force of the second elastic member 232, the locking member 231 is in a position connected to the pump main shaft 150, and the locking member 231 is in a locked state (see Figure 6 ); When the switch member 221 is pressed down, the switch member 221 drives the locking member 231 to move away from the pump main shaft 150, the second elastic member 232 is compressed, and the locking member 231 is converted from the locked state to the unlocked state (see Figure 7 ); When the external force pressing the switch member 221 is eliminated, the locking member 231 moves toward the second opening 21011 (the locking member 231 moves toward the pump main shaft 150) under the driving action of the elastic force generated by the compression of the second elastic member 232, and returns to the locked state (see Figure 6 ).

[0097] In this regard, the switch member 221 and the first elastic member 222 can together constitute the switch module 220, the locking member 231 and the second elastic member 232 can together constitute the locking module 230, and the switch module 220 and the locking module 230 together constitute a locking mechanism. The first elastic member 222 and the second elastic member 232 can both be springs, for example, the first elastic member 222 and the second elastic member 232 can both be compression springs or tension springs; or, leaf springs, elastic rubber, etc. can also be used instead of springs as the first elastic member 222 and the second elastic member 232.

[0098] As for the connection between the locking member 231 and the pump spindle 150, see Figure 6 As shown, in this embodiment, the locking member 231 and the pump main shaft 150 can be connected by a clamping method. Specifically, the locking member 231 can be provided with a first clamping portion 2312 at one end facing the pump main shaft 150, and the pump main shaft 150 can be provided with a second clamping portion 151. When the locking member 231 is in a locked state, the first clamping portion 2312 is clamped with the second clamping portion 151 to achieve the connection between the locking member 231 and the pump main shaft 150.

[0099] As an embodiment, the first clamping portion 2312 may be a clamping boss 2312a extending from an outer side wall of the locking member 231 toward the pump main shaft 150, and the second clamping portion 151 may be a clamping groove 151a provided on the side wall of the pump main shaft 150. When the locking member 231 is in a locked state, the clamping boss 2312a of the locking member 231 is clamped into the clamping groove 151a of the pump main shaft 150, so as to realize the clamping connection between the locking member 231 and the pump main shaft 150, so as to lock the roller assembly 200 on the pump main shaft 150.

[0100] The side of the locking protrusion 2312a of the locking member 231 facing away from the pump main unit 100 (the side of the locking member 231 facing the switch member 221) has a first limiting surface 23121, and correspondingly, the side groove wall of the locking groove 151a of the pump main shaft 150 facing the first opening 2121 (the side groove wall of the locking groove 151a facing the top of the pump main shaft 150) has a second limiting surface 1511. When the locking member 231 is in a locked state, the first limiting surface 23121 of the locking protrusion 2312a abuts against the second limiting surface 1511 of the locking groove 151a, so as to limit the locking protrusion 2312a of the locking member 231 in the locking groove 151a of the pump main shaft 150.

[0101] Continue to refer to Figure 6 , the figure shows that the first limiting surface 23121 on the engaging boss 2312a of the locking member 231 and the second limiting surface 1511 in the engaging groove 151a of the pump main shaft 150 are both in a plane perpendicular to the axial direction of the pump main shaft 150. In other examples, from the side of the engaging boss 2312a away from the pump main shaft 150 to the side of the engaging boss 2312a close to the pump main shaft 150, the first limiting surface 23121 of the engaging boss 2312a can be inclined toward the top of the pump main shaft 150, and the second limiting surface 1511 of the engaging groove 151a matches and fits with the first limiting surface 23121 of the engaging boss 2312a; in this way, the locking member 231 and the pump main shaft 150 are in a barb engaging manner, which helps to prevent the locking member 231 from slipping out of the engaging groove 151a of the pump main shaft 150 (in the direction away from the pump main body 100).

[0102] For the pump main shaft 150 which is generally cylindrical, the engaging groove 151a provided on the side wall of the pump main shaft 150 may be an arc groove extending along the circumference of the pump main shaft 150 (see Figure 5 ), the end of the limiting boss facing the pump main shaft 150 can also extend along an arc (see Figure 8 ), so that the limiting boss can fit with the bottom of the arc groove. For example, a circle of arc grooves can be arranged along the circumference of the pump main shaft 150. In other words, the clamping groove 151a is an annular groove connected end to end. In this way, no matter where the locking member 231 is located on the outer circumference of the pump main shaft 150, the locking member 231 can extend into the clamping groove 151a on the pump main shaft 150.

[0103] In addition, the end of the locking boss 2312a of the locking member 231 that extends into the positioning groove 2101 (the end of the locking boss 2312a that faces the pump main shaft 150) may also be provided with an avoidance surface 23122 (see Figure 7), the avoidance surface 23122 can extend from one side of the clamping boss 2312a toward the pump main unit 100 (the side of the clamping boss 2312a facing away from the switch 221) to the other side of the clamping boss 2312a, and from one end of the avoidance surface 23122 toward the pump main unit 100 to the other end of the avoidance surface 23122, the avoidance surface 23122 is inclined toward the pump main shaft 150. In this way, when the pump main shaft 150 is inserted into the positioning groove 2101 of the roller assembly 200, the avoidance surface 23122 can guide the clamping boss 2312a to avoid the pump main shaft 150, and the top end of the pump main shaft 150 can slide along the avoidance surface 23122, which makes it easier to push the locking member 231 to move in a direction away from the pump main shaft 150, thereby facilitating the connection between the pump main shaft 150 and the roller assembly 200.

[0104] Therefore, when the roller assembly 200 is installed on the pump main unit 100, the locking member 231 can be switched to the unlocked state by only relying on the push action of the pump main shaft 150 on the avoidance surface 23122 of the locking member 231 without pressing the switch member 221. When the roller assembly 200 is installed in place, the locking member 231 is snapped into the snap-in groove 151a of the pump main shaft 150 under the action of the second elastic member 232, so that the locking member 231 is switched to the locked state. Alternatively, the switch member 221 can be pressed down to put the locking member 231 in the unlocked state, and then the roller assembly 200 is installed on the pump main shaft 150, and then the switch member 221 is released to automatically switch the locking member 231 to the locked state.

[0105] Reference Figures 5 to 7 As shown, the housing 210 of the roller assembly 200 may include a roller body 211 and an end cap 212, the roller body 211 and the end cap 212 are detachably connected, the end cap 212 may be connected to the top of the roller body 211, and the accommodating cavity is located between the roller body 211 and the end cap 212, or in other words, the roller body 211 and the end cap 212 are enclosed together to form the aforementioned accommodating cavity. In this way, it is easy to manufacture and shape the housing 210 of the roller assembly 200, it is easy to form the accommodating cavity in the housing 210, and it is also easy to install the locking structure in the accommodating cavity.

[0106] The first opening 2121 on the shell 210 may be located on the end cover 212 , the positioning groove 2101 in the shell 210 may be formed on the roller body 211 , and the notch of the positioning groove 2101 is located on the side of the roller body 211 away from the end cover 212 .

[0107] In order to facilitate the installation of the locking module 230 in the housing 210, a mounting opening 21111 may be provided on the side wall of the roller body 211, the mounting opening 21111 is communicated with the accommodating cavity in the housing 210, the mounting opening 21111 corresponds to the locking module 230, and a detachable baffle 21112 is provided at the mounting opening 21111. When installing the locking module 230, the locking module 230 may be first passed through the mounting opening 21111, and after the locking module 230 is positioned in the accommodating cavity, the baffle 21112 may be connected to the mounting opening 21111 to assemble the roller body 21111 into a complete body.

[0108] Exemplarily, guide grooves 21111a may be provided on both sides of the side wall of the installation opening 21111 on the side wall of the roller body 211 , and both sides of the baffle 21112 are inserted into the guide grooves 21111a on both sides of the installation opening 21111 to plug the baffle 21112 onto the side wall of the roller body 211 .

[0109] Continue to refer to Figures 5 to 7 In this embodiment, the roller assembly 200 may further include a plurality of rollers 213, each of which may be connected between the roller body 211 and the end cover 212, and each roller 213 is arranged at intervals along the circumference of the roller body 211 and is arranged around the outer circumference of the side wall of the roller body 211. Each roller 213 may be connected between the roller body 211 and the end cover 212 via a rotating shaft 2131, and each roller 213 may rotate freely around its own rotating shaft 2131.

[0110] The pipeline of the infusion component 300 is wound around the outer wall of each roller 213, and each roller squeezes the pipeline of the infusion component 300. When the nutrition pump 1 is working, under the pulling action of the pipeline of the infusion component 300, each roller 213 can rotate around its own rotation axis 2131, and rolling friction is generated between the roller 213 and the pipeline of the infusion component 300, which can reduce the squeezing force of the roller assembly 200 on the infusion component 300, ensuring the smooth flow of the fluid in the pipeline of the infusion component 300.

[0111] In this embodiment, the roller body 211 may include a positioning portion 2101a, a main body 2111 and a fixing portion 2112. The fixing portion 2112 is substantially a disc structure, the positioning portion 2101a and the main body 2111 are respectively connected to the fixing portion 2112, the main body 2111 is substantially an annular structure, the main body 2111 is arranged around the positioning portion 2101a, the above-mentioned accommodation cavity is formed between the positioning portion 2101a and the main body 2111, and the positioning groove 2101 passes through the fixing portion 2112 and extends into the positioning portion 2101a.

[0112] Among them, each roller 213 is connected between the end cover 212 and the fixed part 2112 of the roller body 211, and each roller 213 is arranged at circumferential intervals along the fixed part 2112, or in other words, each roller 213 is arranged at circumferential intervals around the main body 2111, so that each roller 213 can be arranged around the outer periphery of the side wall of the roller body 211, so as to realize the piping of the infusion assembly 300 being wound around each roller.

[0113] Fig. 9 for Figure 3 The roller assembly in Figure 5 The AA line section view in the figure. Figure 5 and Fig. 9 As shown, as for the connection method between the roller body 211 and the end cover 212, as an embodiment, the roller assembly 200 and the end cover 212 can be connected by a snap connection method, for example, a snap buckle 2122 can be provided on the end cover 212, and the snap buckle 2122 extends toward the roller body 211, and a snap groove 21113 can be provided on the roller body 211, and the snap groove 21113 is provided on the main body 2111 of the roller body 211. The snap groove 21113 on the roller body 211 is adapted to the snap buckle 2122 on the end cover 212, and the snap buckle 2122 can be snapped into the snap groove 21113 to achieve the connection between the end cover 212 and the roller body 211.

[0114] Of course, the roller body 211 and the end cover 212 can also be connected by fasteners such as screws and bolts, or the roller body 211 and the end cover 212 can be welded (such as ultrasonic welding) or adhesively connected, and this embodiment does not impose specific restrictions on this.

[0115] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A roller assembly, characterized in that: It comprises a shell, and a locking structure connected to the shell, wherein the locking structure comprises a matching switch member and a locking member; the locking member is configured to be in an unlocked state or a locked state when the switch member is triggered.

2. The roller assembly according to claim 1, characterized in that: A positioning groove is provided on one side of the housing, and the locking member is configured to extend into the positioning groove in a locked state, and to move in a direction away from the center line of the positioning groove in an unlocked state.

3. The roller assembly according to claim 2, characterized in that: The housing is provided with a receiving cavity, and the locking structure is installed in the receiving cavity; The shell is also provided with a first opening and a second opening respectively connected with the accommodating cavity, the switch member is movably arranged in the first opening, the second opening is connected with the positioning groove, and the locking member is movably arranged in the second opening.

4. The roller assembly according to claim 3, characterized in that: The switch member includes a pressing portion and a driving portion connected to each other. The pressing portion is movably arranged in the first opening, and the driving portion abuts against the locking member to drive the locking member to move along a side away from the second opening.

5. The roller assembly according to claim 4, characterized in that: The locking member is provided with a guide groove, and the driving part is movably connected in the guide groove; The groove wall of the guide groove has a first guide portion which is arranged obliquely, and the driving portion has a second guide portion which is arranged obliquely, and the first guide portion cooperates with the second guide portion to drive the locking member to move along a side away from the second opening.

6. The roller assembly according to claim 3, characterized in that: The locking structure further includes a first elastic member, two ends of which are respectively in contact with the switch member and an inner wall of the accommodating cavity, and the first elastic member is configured to drive the switch member to move toward one side of the first opening.

7. The roller assembly according to claim 3, characterized in that: The locking structure further includes a second elastic member, two ends of which are respectively in contact with the locking member and the inner wall of the accommodating cavity, and the second elastic member is configured to drive the locking member to move toward one side of the second opening.

8. The roller assembly according to claim 3, characterized in that: The housing comprises a roller body and an end cover which are detachably connected, and the accommodating cavity is located between the roller body and the end cover; The first opening is arranged on the end cover, and the positioning groove is arranged on a side of the roller body away from the end cover.

9. The roller assembly according to claim 8, characterized in that: The side wall of the roller body is provided with an installation opening which is communicated with the accommodating cavity, and a detachable baffle is arranged at the installation opening.

10. The roller assembly according to claim 8, characterized in that: The roller assembly also includes a plurality of rollers. The roller body includes a main body portion and a fixed portion connected to each other. The plurality of rollers are located between the fixed portion and the end cover and are arranged at circumferential intervals around the main body portion. The rollers can rotate around their own rotating axes.

11. The roller assembly according to claim 8, characterized in that: The end cover is provided with a buckle, and the roller body is provided with a slot adapted to the buckle.

12. The roller assembly according to claim 2, characterized in that: An escape surface is provided at one end of the locking member extending into the positioning groove.

13. A nutrition pump, characterized in that: It comprises a pump main unit and the roller assembly according to any one of claims 1 to 12, wherein the roller assembly is detachably connected to the pump main unit.

14. The nutrition pump according to claim 13, characterized in that: The pump main unit is provided with a pump main shaft, and the locking member of the roller assembly is connected to the pump main shaft in a locked state.

15. The nutrition pump according to claim 14, characterized in that: The pump main shaft is provided with a clamping groove, and the locking member of the roller assembly extends into the clamping groove when in a locked state.

16. The nutrition pump according to claim 14, characterized in that: The roller assembly has a positioning groove that is plugged into the pump main shaft. The inner wall of the positioning groove has a first positioning surface, and the outer wall of the pump main shaft has a second positioning surface. The first positioning surface cooperates with the second positioning surface so that the pump main shaft drives the roller assembly to rotate.

17. The nutrition pump according to claim 13, characterized in that: The pump host is also provided with a detection member, which detects the state of the roller assembly and sends a signal to the control unit of the pump host when the roller assembly is abnormal.

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