WO2024074059A1 - 一种吸奶器驱动装置 - Google Patents

一种吸奶器驱动装置 Download PDF

Info

Publication number
WO2024074059A1
WO2024074059A1 PCT/CN2023/102833 CN2023102833W WO2024074059A1 WO 2024074059 A1 WO2024074059 A1 WO 2024074059A1 CN 2023102833 W CN2023102833 W CN 2023102833W WO 2024074059 A1 WO2024074059 A1 WO 2024074059A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
breast pump
chamber
silencer
stepper motor
Prior art date
Application number
PCT/CN2023/102833
Other languages
English (en)
French (fr)
Inventor
倪金祥
王贤文
李浩原
Original Assignee
广东优巨先进新材料股份有限公司
广东金优贝健康用品有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广东优巨先进新材料股份有限公司, 广东金优贝健康用品有限公司 filed Critical 广东优巨先进新材料股份有限公司
Publication of WO2024074059A1 publication Critical patent/WO2024074059A1/zh

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/06—Milking pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons

Definitions

  • the invention relates to a breast pump, in particular to a driving device in the breast pump.
  • a breast pump is a tool used to squeeze out breast milk from the mammary gland. It is divided into manual and electric types.
  • the air pump that controls the air pressure is an important part of the electric breast pump.
  • Existing air pumps are generally DC motor diaphragm air pumps and deceleration DC motor piston pumps.
  • the former squeezes and pulls the diaphragm through the rotation of the DC motor, thereby driving the gas flow to form a negative pressure in the enclosed space connected to the air inlet; while the latter drives the screw to move through the forward and reverse rotation of the DC motor, thereby forming a reciprocating cylinder.
  • the gas flow rate of the DC motor diaphragm air pump is small, and there is an obvious flow attenuation phenomenon during the increase of negative pressure.
  • the deceleration DC motor piston pump has a more complex structure and a high failure rate.
  • the air tightness requirements of various parts of the breast pump are also extremely high. For example, when the operator uses it, if the mouth of the sucking bottle is slightly deviated from the breast, it will cause a program failure, causing the breast pump to fail to work.
  • the motors of existing breast pump air pumps are connected to the cylinder piston through a gear set and a transmission, and the motor rotation angle is detected by a grating. This not only has low working accuracy and high noise, but also easily causes negative pressure imbalance. The negative pressure in the air pump is also likely to affect the motor speed.
  • the carbon brushes of high-speed DC motors have a short lifespan and are prone to ignition and failure.
  • the object of the present invention is to provide a breast pump driving device with a simple structure and accurate and stable operation, so as to improve the accuracy and comfort of the milk pumping operation.
  • the breast pump driving device of the present invention comprises a cylindrical casing with an open end, a motor is mounted on the open end of the casing via a bracket, and a hood covering the stepper motor is also mounted on the casing;
  • the motor is a stepper motor, the output shaft of the stepper motor is a screw, and a piston moving along the inner wall of the casing is threadedly connected to the screw via a screw nut;
  • an air pipe joint is provided at one end of the casing facing away from the stepper motor, and the air pipe joint is provided with a connecting hole connected to the casing.
  • an exhaust hole is provided at one end of the casing facing away from the stepper motor, and a one-way valve is installed at the exhaust hole to only allow gas to be discharged outward; a limit switch is installed in the casing, the stepper motor is started and drives the piston to move to the set position, and the control system starts working after the limit switch detects that the piston is in place.
  • the one-way valve includes a flexible valve membrane and a pressure plate for fixing the valve membrane on the casing.
  • the valve membrane is annular and has a sealing portion in the middle that can close the exhaust hole of the casing.
  • the pressure plate is pressed against the annular edge of the valve membrane.
  • the valve membrane is provided with a membrane hole between the edge and the sealing portion, and the pressure plate is provided with a pressure plate hole connecting the two inner sides.
  • the piston comprises a piston rod and a piston head, the end of the piston rod is provided with a piston hole for the screw rod to extend into, and the screw rod nut is fixedly installed at the piston hole.
  • an inwardly recessed annular positioning groove is provided on the side wall of the piston head, a sealing ring is installed in the positioning groove, and the sealing ring is sealed against the inner wall of the casing.
  • the bracket is sleeved on the piston rod, and mutually matching positioning grooves and positioning ribs are provided between the inner side of the bracket and the outer wall of the piston rod, and the positioning grooves and positioning ribs are arranged parallel to the axial direction of the casing.
  • the end of the bracket is sealed and connected to the opening end of the casing, a silencer air duct for reducing the volume is provided in the end of the bracket, and an air duct inlet and an air duct outlet connected to the silencer air duct are respectively provided on the sides of the end of the bracket facing and facing away from the piston.
  • the silencer airway includes a plurality of silencer chambers connected in sequence, and the last silencer chamber is connected to the airway outlet.
  • Silencer holes are opened on the chamber wall of each silencer chamber facing the airway inlet, and all silencer holes are arranged toward the outside of the silencer chamber.
  • the chamber walls of the silencer chamber facing and facing away from the airway inlet are in the shape of a " ⁇ "; the upper and lower ends of the " ⁇ "-shaped chamber wall are respectively connected to the inner and outer side walls of the silencer chamber; the silencer hole is arranged in the upper part of the " ⁇ "-shaped chamber wall; a silencer plate extending toward the inner side wall of the silencer chamber is also arranged at the midpoint of the " ⁇ "-shaped chamber wall of the silencer chamber facing away from the airway inlet; a gap is left between the silencer plate and the inner side wall of the silencer chamber, and the width of the gap is not greater than one tenth of the width of the silencer chamber.
  • the airway outlet is arranged at the bottom of the terminal silencer chamber and adjacent to the outer wall, and a partition extending toward the other chamber wall is provided at the lower end of the " ⁇ "-shaped chamber wall of the silencer chamber facing the airway inlet.
  • the breast pump driving device of the present invention has a hollow housing, a piston and an inner wall of the housing are sealed and connected by a sealing ring, and moves along the inner wall of the housing driven by a motor, thereby changing the volume of the chamber to form a suction and exhaust effect;
  • the motor is a stepping motor, which is connected to the piston through a screw nut pair, so that the piston can accurately control the stroke to change the volume of the chamber to form a specific suction force;
  • the trachea joint on the housing is connected to the milk suction bottle through the trachea, and the cover of the milk suction bottle is fitted with the breast to form a seal, when the stepping motor drives the piston to move toward one end of the stepping motor, the interconnected housing cavity, trachea, and milk suction bottle will form a negative pressure, thereby forming suction and sucking breast milk;
  • the stepping motor drives the piston to move away from the stepping motor, the negative pressure in the housing decreases until it is equal to the atmospheric pressure,
  • the parts of this breast pump drive device that generate noise are mainly the screw nut pair, the piston and the airflow in the casing.
  • the end of the bracket is sealed with the casing, so that these main noise-generating parts are covered in the chamber, which can effectively reduce the working noise of the breast pump;
  • a silencer air duct is provided on the bracket, so that the sound waves and airflow are discharged from the casing from the air duct outlet after the noise reduction of the silencer air duct, thereby further reducing the noise volume.
  • this breast pump drive device utilizes a stepper motor and a screw nut pair to drive the piston to move to change the air pressure, its action is precise, the suction is stable, there is basically no flow attenuation phenomenon, it can form accurate suction, and improve the comfort of use; at the same time, the breast pump drive device has good working stability and low requirements for air tightness, which can reduce the failure rate and improve the convenience of use; furthermore, the breast pump The working noise is extremely low, which can reduce the impact of working noise on newborn mothers and improve their comfort.
  • FIG. 1 is a schematic structural diagram of a breast pump driving device.
  • FIG. 2 is a schematic cross-sectional view of the driving device of the breast pump.
  • FIG. 3 is a schematic diagram of a partial structure of the driving device of the breast pump shown in FIG. 2 .
  • FIG. 4 is a schematic diagram of the connection structure between the bracket and the piston.
  • 5 and 6 are schematic diagrams of the structure of the bracket and the silencer airway thereon.
  • FIG. 7 is a schematic diagram of the partial structure of the silencing air duct shown in FIG. 6 .
  • FIG. 8 is a schematic diagram of the structure of the silencer air duct from a top view.
  • the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial).
  • the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
  • first or “second” the descriptions of “first” or “second” are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first” or “second” may explicitly or implicitly include at least one of the features.
  • the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
  • the invention provides a breast pump driving device.
  • the breast pump driving device includes a cylindrical casing 1 with an open end, a stepper motor 3 is installed on the open end of the casing through a bracket 2, and a hood 4 covering the stepper motor is also installed on the casing;
  • the output shaft of the stepper motor is a screw 5, and the piston moving along the inner wall of the casing is screwed to the screw through a screw nut 7;
  • an air pipe joint 11 is provided at one end of the casing facing away from the stepper motor, and the air pipe joint is provided with a connecting hole connected to the casing.
  • the breast pump drive device is hollow in the casing, the piston is sealed with the inner wall of the casing by a sealing ring, and moves along the inner wall of the casing driven by the motor, thereby changing the volume of the chamber to form a suction and exhaust effect;
  • the motor is The stepper motor is connected to the piston through a screw-nut pair, so that the piston can accurately control the stroke to change the volume of the chamber to form a specific suction force;
  • the trachea joint on the casing is connected to the milk bottle through the trachea, and the cover of the milk bottle fits against the breast to form a seal.
  • the stepper motor drives the piston to move toward one end of the stepper motor, the interconnected inner cavity of the casing, the trachea, and the milk bottle will form a negative pressure, thereby forming suction and sucking breast milk;
  • the stepper motor drives the piston to move away from the stepper motor, a positive pressure will be formed in the inner cavity of the casing, and then as the piston moves, the gas will be discharged out of the casing through the one-way valve, so that the casing and the milk bottle return to air pressure balance to wait for the next milk sucking action.
  • an exhaust hole is provided at one end of the casing 1 facing away from the stepper motor 3, and a one-way valve is installed at the exhaust hole so that only gas can be discharged outward; in addition, a limit switch 9 is installed in the casing 1, and the stepper motor 3 is started and drives the piston to move to a set position.
  • the control system starts to work after the limit switch detects that the piston is in place, thereby resetting the breast pump after it is turned on to ensure the accuracy and stability of the suction force in subsequent work, thereby improving the working accuracy and comfort of use; when the machine is turned on, if the piston is at one end of the stepper motor or the middle of the casing, when it is reset and then moves to the end facing away from the stepper motor, a positive pressure will be generated in the casing, and these excess gases will be discharged through the one-way valve to ensure the safety of the breast pump.
  • the one-way valve comprises a flexible valve membrane 81 and a pressing plate 82 for fixing the valve membrane on the housing 1.
  • the valve membrane is annular and has a sealing portion 83 in the middle that can close the exhaust hole of the housing.
  • the pressing plate is pressed against the annular edge of the valve membrane.
  • the valve membrane is provided with a membrane hole 84 between the edge and the sealing portion.
  • the pressing plate is provided with a pressing plate hole 85 that communicates with both sides of the inner side.
  • the one-way valve has a simple structure but a very fast response speed to changes in air pressure, which can improve the working accuracy of the breast pump.
  • the breast pump drive device described above comprises a piston including a piston rod 61 and a piston head 62.
  • the end of the piston rod is provided with a piston hole 63 for the screw rod 5 to extend into.
  • the screw nut 7 is fixedly installed at the piston hole by a fastening screw 64, which can not only ensure the sealing between the piston and the housing, but also make the connection structure between the parts more compact to reduce the volume of the device.
  • the side wall of the piston head 62 is provided with an inwardly recessed annular positioning groove 65, in which a sealing ring 66 is installed, and the sealing ring is sealed against the inner wall of the housing 1 to form an interference fit, and the sealing ring is used to improve the sealing.
  • bracket 2 is sleeved on the piston rod 61, and the inner side of the bracket and the outer wall of the piston rod are provided with mutually matching positioning grooves 21 and positioning convex ribs 67, and the positioning grooves and positioning convex ribs are arranged parallel to the axial direction of the housing, so as to limit and guide the piston rod, improve the working stability and working accuracy of the piston rod, and also prevent the stepper motor from driving the piston rod to rotate incorrectly.
  • the end of the bracket 2 is sealed and connected to the open end of the housing 1, and a sound-reducing airway is provided in the end of the bracket, and an airway inlet 22 and an airway outlet 23 connected to the sound-reducing airway are respectively provided on the sides of the end of the bracket facing toward and away from the piston;
  • the parts of the breast pump drive device that generate noise are mainly the screw nut pair, the piston and the air in the housing.
  • the end of the bracket is sealed with the casing, so that these main noise-generating components are covered in the chamber, which can effectively reduce the working noise of the breast pump; at the same time, a silencer air duct is set on the bracket, so that the sound waves and airflow are discharged from the air duct outlet to the outside of the casing after passing through the noise reduction of the silencer air duct, thereby further reducing the noise volume.
  • the silencer air duct includes a plurality of silencer chambers 24 connected in sequence, and the last silencer chamber is connected to the air duct outlet 23. Each silencer chamber has a silencer hole 25 on the chamber wall facing the air duct inlet 22.
  • All silencer holes are set toward the outside of the silencer chamber (or toward the inside of the silencer chamber), that is, toward the side wall of the silencer chamber facing away from the screw rod, so that the sound waves entering from the silencer hole can be projected toward the outer wall of the silencer chamber.
  • the sound waves can pass through the entire silencer chamber before entering the lower A silencer chamber, on the other hand, the sound waves reflected by the outer wall of the silencer chamber will interfere with the subsequent sound waves, thereby weakening the sound waves to a certain extent. Therefore, the sound waves pass through all the silencer chambers and are discharged from the airway outlet.
  • the silencer airway can be as shown in Figures 5-8, the chamber walls of the silencer chamber 24 facing and facing away from the airway inlet 22 are in the shape of a " ⁇ ", and the upper and lower ends of the " ⁇ "-shaped chamber wall are respectively connected to the silencer chamber
  • the inner and outer walls of the chamber, the muffler hole is arranged at the upper part of the " ⁇ "-shaped chamber wall, and the muffler plate 26 extending toward the inner wall of the muffler chamber is also arranged at the midpoint of the " ⁇ "-shaped chamber wall of the muffler chamber facing away from the airway inlet, and a gap is left between the muffler plate and the inner wall of the muffler chamber, and the width of the gap is not greater than one tenth of the width of the muffler chamber, which can further divide the muffler chamber into two large and small chambers, the outer width of the large chamber is greater than the inner

Abstract

一种吸奶器驱动装置，一端开口的机壳（1）上通过支架安装步进电机（3），步进电机（3）的输出转轴为丝杆（5）并通过丝杆螺母（7）连接活塞，机壳（1）另一端设有气管接头（11）和单向阀以配合机壳（1）腔室形成不同气压，支架（2）上还设有消音气道，以降低工作噪音。该吸奶器驱动装置利用步进电机（3）和丝杆螺母（7）副带动活塞移动以改变气压，其动作精准，吸力稳定，基本不存在流量衰减现象，可形成准确的吸力，并提高使用舒适性；同时，吸奶器驱动装置的工作稳定性好，对气密性的要求较低，可降低故障率和提高使用方便性；再者，吸奶器的工作噪音极低，可减少工作噪音对新生儿母亲的影响，提高其使用舒适性。

Description

一种吸奶器驱动装置 技术领域
本发明涉及吸奶器，特别是涉及一种吸奶器中的驱动装置。
背景技术
吸奶器是一种用于挤出乳腺内母乳的工具，其分为手动式和电动式，控制气压的气泵则是电动式吸奶器中的重要组成部分。现有的气泵一般为直流马达式隔膜式气泵和减速直流马达式活塞泵，前者通过直流马达的转动挤拉隔膜片，从而带动气体流动以使与进气口连接的密闭空间形成负压；而后者则通过直流马达的正反转动带动螺杆运动，从而形成往复运动的气缸。直流马达式隔膜式气泵的气体流量较小，且在负压增大的过程中存在明显的流量衰减现象，难以满足较大、较精准吸力的使用需要，且其工作稳定性较差，不仅无法保证稳定的吸力和工作精度，还容易为使用者带来不适的使用体验。而减速直流马达式活塞泵的结构则较为复杂，故障率高，使用过程中对吸奶器各部位的气密性要求也极高，如操作者使用时，吸奶瓶罩口与乳房贴合稍有偏差，就会引发程序故障，导致吸奶器无法工作。另外，现有吸奶器气泵的电机都是通过齿轮组和变速器连接气缸活塞，同时通过光栅检测电机转动角度，其不仅工作精度低、噪音大，还容易造成负压不平衡，气泵内的负压也容易对电机转速造成影响。高速直流马达的碳刷寿命低，容易打火产生故障。
发明内容
本发明的目的在于提供一种结构简单且工作准确、稳定的吸奶器驱动装置，以提高吸奶操作的准确性和舒适性。
本发明所述的吸奶器驱动装置，包括筒状且一端开口的机壳，机壳的开口端通过支架安装有电机，机壳上还装有包覆步进电机的机罩，；所述电机为步进电机，步进电机的输出转轴为丝杆，沿机壳内壁移动的活塞通过丝杆螺母与丝杆螺接；机壳背向步进电机的一端设有气管接头，气管接头设有连通机壳内的连通孔。
进一步地，机壳背向步进电机的一端设有排气孔，排气孔处装有仅可供气体向外排出的单向阀；机壳内安装有限位开关，步进电机启动并带动活塞移动至设定位置，控制系统在限位开关检测活塞到位后开始工作。
进一步地，单向阀包括柔性的阀膜和将阀膜固定安装于机壳上的压板，阀膜为环状且中部设有可封闭机壳排气孔的密封部，压板压紧于阀膜的环形边缘，阀膜位于边缘与密封部之间设有膜孔，压板上设有连通内侧两侧的压板孔。
进一步地，活塞包括活塞杆和活塞头，活塞杆的端部设有供丝杆伸入的活塞孔，丝杆螺母固定安装于活塞孔处。
进一步地，活塞头的侧壁处设有内向凹陷的环形的定位槽，定位槽内安装有密封圈，且密封圈与机壳内壁相抵密封。
进一步地，支架套于活塞杆上，且支架内侧与活塞杆外壁之间设有相互配合的定位凹槽和定位凸筋，且定位凹槽和定位凸筋平行于机壳轴向设置。
进一步地，支架的端部与机壳开口端密封连接，支架端部内设有可降低音量的消音气道，支架端部朝向和背向活塞的侧面分别设有连通消音气道的气道入口和气道出口。
进一步地，消音气道包括若干个依次连接设置的消音腔室，且最后一个消音腔室连通气道出口，各消音腔室朝向气道入口的腔室壁处均开有消音孔，所有消音孔均朝向消音腔室的外侧设置。
进一步地，消音腔室朝向和背向气道入口的腔室壁为“＜”字型，腔室壁“＜”字型的上、下两端分别连接消音腔室的内、外侧壁，消音孔设置于腔室壁“＜”字型的上部分，消音腔室背向气道入口腔室壁的“＜”字型中点处还设有向消音腔室的内侧壁延伸的消音板，消音板与消音腔室内侧壁之间留有间隙，且间隙宽度不大于消音腔室宽度的十分之一。
进一步地，气道出口设置于末端消音腔室底部与外侧壁相邻处，该消音腔室朝向气道入口的腔室壁的“＜”字型下端处设有向另一腔室壁延伸的隔板。
本发明所述的吸奶器驱动装置，机壳内中空设置，活塞与机壳内壁通过密封圈密封连接，并在电机的带动下沿机壳内壁移动，从而改变腔室体积而形成抽气和排气效果；所述的电机为步进电机，其通过丝杆螺母副连接活塞，使活塞可以精准地控制行程以改变腔室体积而形成特定的吸力；机壳上的气管接头通过气管连接吸奶瓶，而吸奶瓶的罩口则与乳房贴合形成密封，当步进电机带动活塞向步进电机一端移动时，相互连通的机壳内腔、气管、吸奶瓶将形成负压，从而形成吸力并吸取母乳；当步进电机带动活塞背向步进电机移动时，机壳内的负压减小，直至与大气压相等，使机壳及吸奶瓶回复气压平衡，以等待下一次的吸奶动作。另一方面，该种吸奶器驱动装置产生噪音的部位主要为丝杆螺母副、活塞和机壳内的气流，为此将支架端部与机壳密封设置，从而将这些产生噪音的主要部件包覆与腔室内，这可以有效降低吸奶器的工作噪音；同时，在支架上设置消音气道，使音波、气流经过消音气道的降噪后再从气道出口排出机壳外，从而进一步降低噪音音量。其有益效果在于：该种吸奶器驱动装置利用步进电机和丝杆螺母副带动活塞移动以改变气压，其动作精准，吸力稳定，基本不存在流量衰减现象，可形成准确的吸力，并提高使用舒适性；同时，吸奶器驱动装置的工作稳定性好，对气密性的要求较低，可降低故障率和提高使用方便性；再者，吸奶器的 工作噪音极低，可减少工作噪音对新生儿母亲的影响，提高其使用舒适性。
附图说明
图1是吸奶器驱动装置的结构示意图。
图2是吸奶器驱动装置的剖视结构示意图。
图3是图2所示吸奶器驱动装置的局部结构示意图。
图4是支架与活塞的连接结构示意图。
图5、6是支架及其上消音气道的结构示意图。
图7是图6所示消音气道的局部结构示意图。
图8是消音气道的俯视结构示意图。
具体实施方式
下面将结合附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示(诸如上、下、左、右、前、后、顶、底、内、外、垂向、横向、纵向，逆时针、顺时针、周向、径向、轴向……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
若本发明实施例中有涉及“第一”或者“第二”等的描述，则该“第一”或者“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种吸奶器驱动装置。
本实用新型实施例中，吸奶器驱动装置包括筒状且一端开口的机壳1，机壳的开口端通过支架2安装有步进电机3，机壳上还装有包覆步进电机的机罩4；步进电机的输出转轴为丝杆5，沿机壳内壁移动的活塞通过丝杆螺母7与丝杆螺接；机壳背向步进电机的一端设有气管接头11，气管接头设有连通机壳内的连通孔。
所述的吸奶器驱动装置，机壳内中空设置，活塞与机壳内壁通过密封圈密封连接，并在电机的带动下沿机壳内壁移动，从而改变腔室体积而形成抽气和排气效果；所述的电机为 步进电机，其通过丝杆螺母副连接活塞，使活塞可以精准地控制行程以改变腔室体积而形成特定的吸力；机壳上的气管接头通过气管连接吸奶瓶，而吸奶瓶的罩口则与乳房贴合形成密封，当步进电机带动活塞向步进电机一端移动时，相互连通的机壳内腔、气管、吸奶瓶将形成负压，从而形成吸力并吸取母乳；当步进电机带动活塞背向步进电机移动时，机壳内腔将形成正压，然后随着活塞的移动，气体将通过单向阀排出机壳外，使机壳及吸奶瓶回复气压平衡，以等待下一次的吸奶动作。
所述的吸奶器驱动装置，机壳1背向步进电机3的一端设有排气孔，排气孔处装有仅可供气体向外排出的单向阀；另外，所述机壳1内安装有限位开关9，步进电机3启动并带动活塞移动至设定位置，控制系统在限位开关检测活塞到位后开始工作，由此使吸奶器开机后进行复位，以保证后续工作中吸力的准确性和稳定性，从而提高工作精度和使用舒适性；在开机启动时，若活塞处于步进电机一端或者机壳中部，其进行复位再向背向步进电机一端移动时，机壳内将产生正压，这些多余的气体将通过单向阀排走，以保证吸奶器工作的安全性。所述的单向阀包括柔性的阀膜81和将阀膜固定安装于机壳1上的压板82，阀膜为环状且中部设有可封闭机壳排气孔的密封部83，压板压紧于阀膜的环形边缘，阀膜位于边缘与密封部之间设有膜孔84，压板上设有连通内侧两侧的压板孔85；在活塞朝向步进电机移动时，机壳内腔形成负压并产生吸力，阀膜在吸力的作用力通过密封部抵紧机壳上的排气孔，从而对排气孔形成密封；在活塞背向步进电机移动时，机壳内腔形成正压，其内的空气有向外排放的需要，阀膜即在空气推力的作用下产生形变，密封部被推离排气孔，机壳内的气孔即通过排气孔、膜孔、压板孔向外排放，使机壳及吸奶瓶回复气压平衡；该种单向阀结构简单但随气压变化的响应速度极快，可以提高吸奶器的工作准确性。
所述的吸奶器驱动装置，活塞包括活塞杆61和活塞头62，活塞杆的端部设有供丝杆5伸入的活塞孔63，丝杆螺母7通过紧固螺钉64固定安装于活塞孔处，这既可以保证活塞与机壳之间的密封性，也可以使零件之间的连接结构更加紧凑，以减小设备体积；活塞头62的侧壁处设有内向凹陷的环形的定位槽65，定位槽内安装有密封圈66，且密封圈与机壳1内壁相抵密封从而形成过盈配合，利用密封圈提高密封性。另外，支架2套于活塞杆61上，且支架内侧与活塞杆外壁之间设有相互配合的定位凹槽21和定位凸筋67，且定位凹槽和定位凸筋平行于机壳轴向设置，从而对活塞杆形成限位和导向，提高活塞杆的工作稳定性和工作精度，也避免步进电机带动活塞杆发生错误转动。
所述的吸奶器驱动装置，支架2的端部与机壳1开口端密封连接，支架端部内设有可降低音量的消音气道，支架端部朝向和背向活塞的侧面分别设有连通消音气道的气道入口22和气道出口23；该种吸奶器驱动装置产生噪音的部位主要为丝杆螺母副、活塞和机壳内的气 流，为此将支架端部与机壳密封设置，从而将这些产生噪音的主要部件包覆与腔室内，这可以有效降低吸奶器的工作噪音；同时，在支架上设置消音气道，使音波、气流经过消音气道的降噪后再从气道出口排出机壳外，从而进一步降低噪音音量。所述的消音气道包括若干个依次连接设置的消音腔室24，且最后一个消音腔室连通气道出口23，各消音腔室朝向气道入口22的腔室壁处均开有消音孔25，所有消音孔均朝向消音腔室的外侧设置(或均朝向消音腔室的内侧设置)，即朝向消音腔室背向丝杆的侧壁设置，这使得从消音孔进入的音波可以射向消音腔室的外侧壁，一方面，使得音波可以经过整个消音腔室后再进入下一个消音腔室，另一方面，经消音腔室外侧壁反射的音波会与后续进入的音波形成相向的干涉，从而使音波发生一定程度的削弱，由此，音波经过所有消音腔室再从气道出口排出这一过程，可以形成极大程度的削弱，从而降低噪音；具体地，消音气道可以如图5-8所示，消音腔室24朝向和背向气道入口22的腔室壁为“＜”字型，腔室壁“＜”字型的上、下两端分别连接消音腔室的内、外侧壁，消音孔设置于腔室壁“＜”字型的上部分，消音腔室背向气道入口腔室壁的“＜”字型中点处还设有向消音腔室的内侧壁延伸的消音板26，消音板与消音腔室内侧壁之间留有间隙，且间隙宽度不大于消音腔室宽度的十分之一，这可以将消音腔室进一步分割为大、小两个腔室，大腔室的外侧宽度大于内侧宽度，音波从消音孔指向并射向外侧后再反射向内侧，使音波可以形成多次的反射和对射，由此对音波形成多次的削弱，削弱后的音波从消音板处的间隙进入小腔室，然后再射向下一个消音腔室，从而形成多级消音结构，极大的降低了噪音的音量；另外，气道出口23设置于末端消音腔室24底部与外侧壁相邻处，该消音腔室朝向气道入口22的腔室壁的“＜”字型下端处设有向另一腔室壁延伸的隔板27，这同样可以进一步降低噪音音量。通过该种消音气道结构的设置，可以有效降低吸奶器的工作噪音，从而提高使用舒适性。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (10)

  1. 一种吸奶器驱动装置，包括筒状且一端开口的机壳(1)，机壳的开口端通过支架(2)安装有电机，机壳上还装有包覆步进电机的机罩(4)，其特征在于：所述电机为步进电机(3)，步进电机的输出转轴为丝杆(5)，沿机壳内壁移动的活塞通过丝杆螺母(7)与丝杆螺接；机壳背向步进电机的一端设有气管接头(11)，气管接头设有连通机壳内的连通孔。
  2. 根据权利要求1所述的吸奶器驱动装置，其特征在于：机壳(1)背向步进电机(3)的一端设有排气孔，排气孔处装有仅可供气体向外排出的单向阀；机壳(1)内安装有限位开关(9)，步进电机(3)启动并带动活塞移动至设定位置，控制系统在限位开关检测活塞到位后开始工作。
  3. 根据权利要求2所述的吸奶器驱动装置，其特征在于：单向阀包括柔性的阀膜(81)和将阀膜固定安装于机壳(1)上的压板(82)，阀膜为环状且中部设有可封闭机壳排气孔的密封部(83)，压板压紧于阀膜的环形边缘，阀膜位于边缘与密封部之间设有膜孔(84)，压板上设有连通内侧两侧的压板孔(85)。
  4. 根据权利要求1、2或3所述的吸奶器驱动装置，其特征在于：活塞包括活塞杆(61)和活塞头(62)，活塞杆的端部设有供丝杆(5)伸入的活塞孔(63)，丝杆螺母(7)固定安装于活塞孔处。
  5. 根据权利要求4所述的吸奶器驱动装置，其特征在于：活塞头(62)的侧壁处设有内向凹陷的环形的定位槽(65)，定位槽内安装有密封圈(66)，且密封圈与机壳(1)内壁相抵密封。
  6. 根据权利要求4所述的吸奶器驱动装置，其特征在于：支架(2)套于活塞杆(61)上，且支架内侧与活塞杆外壁之间设有相互配合的定位凹槽(21)和定位凸筋(67)，且定位凹槽和定位凸筋平行于机壳轴向设置。
  7. 根据权利要求1、2或3所述的吸奶器驱动装置，其特征在于：支架(2)的端部与机壳(1)开口端密封连接，支架端部内设有可降低音量的消音气道，支架端部朝向和背向活塞的侧面分别设有连通消音气道的气道入口(22)和气道出口(23)。
  8. 根据权利要求7所述的吸奶器驱动装置，其特征在于：消音气道包括若干个依次连接设置的消音腔室(24)，且最后一个消音腔室连通气道出口(23)，各消音腔室朝向气道入口(22)的腔室壁处均开有消音孔(25)，所有消音孔均朝向消音腔室的外侧设置。
  9. 根据权利要求8所述的吸奶器驱动装置，其特征在于：消音腔室(24)朝向和背向气道入口(22)的腔室壁为“＜”字型，腔室壁“＜”字型的上、下两端分别连接消音腔室的内、外侧壁，消音孔设置于腔室壁“＜”字型的上部分，消音腔室背向气道入口腔室壁的“＜”字型中点处还设有向消音腔室的内侧壁延伸的消音板(26)，消音板与消音腔室内侧壁之间留有间隙，且间隙宽度不大于消音腔室宽度的十分之一。
  10. 根据权利要求9所述的吸奶器驱动装置，其特征在于：气道出口(23)设置于末端消音腔室(24)底部与外侧壁相邻处，该消音腔室朝向气道入口22的腔室壁的“＜”字型下端处设有向另一腔室壁延伸的隔板(27)。
PCT/CN2023/102833 2022-10-08 2023-06-27 一种吸奶器驱动装置 WO2024074059A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211230322.6A CN115370554A (zh) 2022-10-08 2022-10-08 一种吸奶器驱动装置
CN202211230322.6 2022-10-08

Publications (1)

Publication Number Publication Date
WO2024074059A1 true WO2024074059A1 (zh) 2024-04-11

Family

ID=84072564

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/102833 WO2024074059A1 (zh) 2022-10-08 2023-06-27 一种吸奶器驱动装置

Country Status (2)

Country Link
CN (1) CN115370554A (zh)
WO (1) WO2024074059A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN219127619U (zh) * 2022-10-08 2023-06-06 广东优巨先进新材料股份有限公司 一种吸奶器消音气泵结构
CN115370554A (zh) * 2022-10-08 2022-11-22 广东优巨先进新材料股份有限公司 一种吸奶器驱动装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003014072A (ja) * 2001-04-27 2003-01-15 Mitsubishi Heavy Ind Ltd ボールねじ装置、及び同装置を備えた射出成形機、及びボールねじ装置制御方法
US20170067455A1 (en) * 2014-02-26 2017-03-09 Techni Waterjet Pty Ltd Linear actuator
CN110242537A (zh) * 2019-06-27 2019-09-17 张谭伟 一种丝杆螺母空压机
CN216518551U (zh) * 2021-12-24 2022-05-13 深圳市时光电子有限公司 低噪音真空泵及具有其的吸奶器
CN217270672U (zh) * 2022-04-28 2022-08-23 广州布布健康科技有限公司 一种快速关放气的吸奶器活塞泵
CN115370554A (zh) * 2022-10-08 2022-11-22 广东优巨先进新材料股份有限公司 一种吸奶器驱动装置
CN218598320U (zh) * 2022-10-08 2023-03-10 广东优巨先进新材料股份有限公司 一种吸奶器驱动装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003014072A (ja) * 2001-04-27 2003-01-15 Mitsubishi Heavy Ind Ltd ボールねじ装置、及び同装置を備えた射出成形機、及びボールねじ装置制御方法
US20170067455A1 (en) * 2014-02-26 2017-03-09 Techni Waterjet Pty Ltd Linear actuator
CN110242537A (zh) * 2019-06-27 2019-09-17 张谭伟 一种丝杆螺母空压机
CN216518551U (zh) * 2021-12-24 2022-05-13 深圳市时光电子有限公司 低噪音真空泵及具有其的吸奶器
CN217270672U (zh) * 2022-04-28 2022-08-23 广州布布健康科技有限公司 一种快速关放气的吸奶器活塞泵
CN115370554A (zh) * 2022-10-08 2022-11-22 广东优巨先进新材料股份有限公司 一种吸奶器驱动装置
CN218598320U (zh) * 2022-10-08 2023-03-10 广东优巨先进新材料股份有限公司 一种吸奶器驱动装置

Also Published As

Publication number Publication date
CN115370554A (zh) 2022-11-22

Similar Documents

Publication Publication Date Title
WO2024074059A1 (zh) 一种吸奶器驱动装置
CN218598320U (zh) 一种吸奶器驱动装置
JP2007032434A (ja) 送風装置
WO2024074058A1 (zh) 一种吸奶器消音气泵结构
CN101230858A (zh) 抽空装置
WO2020253070A1 (zh) 压力真空控制泵
CN112963383B (zh) 一种降噪装置、高速涡轮风机及呼吸机
CN112780587B (zh) 气体增压器及燃气设备
CN111963409B (zh) 吸气消音器
CN206694231U (zh) 一种静音型负压泵
CN210068448U (zh) 气体隔膜泵
JP6150477B2 (ja) 往復動式ポンプ
CN215057989U (zh) 一种八缸真空泵
CN219001566U (zh) 一种低噪音呼吸机
CN219549060U (zh) 一种新型连杆活塞充气泵
US20180355870A1 (en) Expansion chamber for a brake boost vacuum pump
CN219733606U (zh) 一种空压机风量调节装置
CN215370185U (zh) 一种隔膜泵液体输送单元
KR101239265B1 (ko) 진공펌프를 포함하는 제어 어셈블리와 진공펌프의 제어방법.
CN220929783U (zh) 一种降噪排烟风机
CN112780586B (zh) 燃气增压器及燃气设备
CN211244514U (zh) 一种帮助心肺复苏的装置
CN215170670U (zh) 一种单进双出双腔微型泵
CN215762161U (zh) 一种防泄漏的双膜式气动隔膜泵
CN220522740U (zh) 一种双头泵