CN201953601U - Miniature negative pressure pump - Google Patents

Miniature negative pressure pump Download PDF

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Publication number
CN201953601U
CN201953601U CN 201020669428 CN201020669428U CN201953601U CN 201953601 U CN201953601 U CN 201953601U CN 201020669428 CN201020669428 CN 201020669428 CN 201020669428 U CN201020669428 U CN 201020669428U CN 201953601 U CN201953601 U CN 201953601U
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China
Prior art keywords
piston
air
vacuum pump
way
piston chamber
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CN 201020669428
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Chinese (zh)
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李佳
石先英
菅冀祁
隗刚
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惠州市华阳多媒体电子有限公司
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Publication of CN201953601U publication Critical patent/CN201953601U/en

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Abstract

The utility model discloses a miniature negative pressure pump which comprises an air flow component and a transmission component, wherein the air flow component comprises an air tap (130), a press block (134) and a piston body (136) with at least two piston cavities (135), the press block (134) is positioned above the piston cavities (135) and provided with air vents communicated with the corresponding piston cavities (135), one part of the air vents are provided with one-way air inlet valves (132), and the other part of the air vents are provided with one-way air outlet valves (133); a one-way air inlet path is composed of the air tap (130), the one-way air inlet valves (132), the air vents and the corresponding piston cavities (135); a one-way air outlet path is composed of the air vents arranged on the corresponding piston cavities (135), the one-way air outlet valves (133) and air outlets (131) communicated with the air vents on a base (139); and the transmission component is connected with an air guide component to drive the piston body (136) to do a reciprocating motion in the piston cavities (135). As continuous negative pressure can be formed at the air tap, the miniature negative pressure pump is suitable for negative-pressure wound treatment equipment and the like.

Description

一种微型负压泵 A miniature vacuum pump

技术领域 FIELD

[0001] 本实用新型涉及微型负压泵,或称微型真空泵,能够在气泵的气嘴处形成持续、稳定负压(相对真空),特别适用于负压伤口治疗设备等医疗器械、电子仪器。 [0001] The present invention relates to a micro vacuum pump, also known as micro-pump, capable of forming a continuous, stable negative pressure in the pump at a gas nozzle (relative to vacuum), is particularly suitable for a negative pressure wound therapy device and other medical equipment, electronic instruments.

背景技术 Background technique

[0002] Negative Pressure Wound Therapy Devices, [0002] Negative Pressure Wound Therapy Devices,

为NPWT设备,其原理为通过给伤口处施加负压,来促进伤口的愈合。 NPWT apparatus is, by applying the principle of a negative pressure to the wound to promote wound healing. 根据美国近10年来的临床表明,该设备对各种急慢性的伤口处理有着良好的愈合效果。 According to the United States nearly 10 years of clinical indicate that the device has a good healing effect on a variety of acute and chronic wound treatment.

[0003] 不言而喻,负压产生装置为负压伤口治疗设备的一个关键部件,其基本要求是提供持续、稳定的负压。 [0003] Needless to say, the negative pressure generating means is a key component of the negative pressure wound therapy device, which is required to provide substantially continuous, stable negative pressure. 由于现有负压产生装置大多结构复杂,体积较大,不便于携带,且价格较高,因而不利于负压伤口治疗设备的推广使用。 Since most of the conventional negative pressure generating apparatus structure complex, bulky, not easy to carry, and higher price, which is not conducive to promoting the use of negative pressure wound therapy devices. 为了实现负压产生装置的小型化,可以借鉴现有微型气泵的设计方式,例如: In order to realize miniaturization of the negative pressure generating apparatus, the conventional micro-pump can draw designs, for example:

[0004] 膜片式气泵,是往复活塞式气泵的一种,其用膜片代替了活塞。 [0004] The diaphragm pump, a reciprocating piston pump, which is replaced with a diaphragm piston. 因膜片一般是柔性材料,质量较小,虽然也做往复直线运动,但引起的不平衡惯性力减小,振动和机械噪声较低,膜片与泵腔之间无摩擦磨损,消耗功率较低,可克服往复活塞式气泵噪声、磨损、功耗等方面的缺点,对血压计等小型医疗电子产品尤其适用。 Because the membrane is generally flexible material, low mass, although a reciprocating rectilinear motion, but the inertia force caused by the imbalance is reduced, vibration and mechanical noise is low, no pump chamber between the diaphragm and the friction and wear, power consumption than low, can overcome the shortcomings of reciprocating piston pump terms of noise, wear and tear, power consumption, blood pressure monitors for medical and other small electronic products particularly suitable. 但由于其提供的不是负压,因而不能简单地用于负压伤口治疗设备。 However, because of the negative pressure it is not supplied, and therefore can not be simply used for a negative pressure wound therapy device.

[0005] 中国专利局2006年5月3日公开的名称为“一种低功耗的微型气压泵”、申请号为“CN200510021763. 5”的实用新型专利包括气体导流组件和传动组件:气体导流组件包括气嘴、压块和具有两个以上活塞腔的活塞体;传动组件包括马达、驱动轮、传动轴和活塞支架;传动轴的一端位于活塞支架的偏心球面孔内,另一端位于固定于马达输出轴上的驱动轮的球面孔内;由压缩活塞体后在活塞腔内形成的压缩气体经压块上对应该活塞腔设置的单向出气阀后接气嘴输出。 [0005] the name of the Chinese Patent Office on May 3, 2006 disclosed as "a low-power miniature pneumatic pump" application number "CN200510021763 5." Utility model patents, including the diversion of gas transmission assemblies and components: gas deflector assembly comprises a gas nozzle, the compact body and the piston a piston chamber having two or more; drive assembly includes a motor, a drive wheel, the drive shaft and the piston support; end of the drive shaft within the piston holder eccentric ball faces, the other end is located inner ball face of the drive wheel fixed to the motor output shaft; compressed gas formed by the compression piston in the piston chamber after the output of the one-way valve piston chamber should be provided by the nozzle coherent compacts. 与其他气压泵相比,该微型气压崩的传动结构运动时内部无串动,磨擦小,可防止空气倒流且结构简单可靠,从而可有效提高效率,降低功耗。 Compared with other pneumatic pump, when the micro movement of the pressure transmission structure without collapse of the internal string action, friction, and prevents air back simple and reliable structure, which can improve the efficiency, reduce power consumption. 但由于前述气泵的气嘴处提供压缩空气而非负压,因此也不能适用于NPWT等负压治疗设备。 However, due to the negative pressure instead of compressed air provided at the mouth of the pump, and therefore it can not be applied to other NPWT negative pressure therapy device.

实用新型内容 SUMMARY

[0006] 本实用新型目的在于对现有气泵设备结构及气路进行改进,使之可在气嘴处提供负压,从而适用于NPWT等医疗电子设备。 [0006] The object of the present invention to the existing pump device configuration and to improve the gas passage, so that negative pressure may be provided in the gas at the mouth, making it ideal for NPWT other medical electronic equipment.

[0007] 为解决以上技术问题,本实用新型的技术方案是,一种微型负压泵,包括气流组件和传动组件,所述气体导流组件包括气嘴(130)、压块(134)和具有至少两个活塞腔(135) 的活塞体(136):压块(134)位于活塞腔(13¾上方并设置与对应活塞腔(13¾连通的通气孔,其中一部分通气孔处设置单向进气阀(132),另一部分通气孔处设置单向出气阀(133);由气嘴(130)、单向进气阀(132)、通气孔及对应活塞腔(13¾构成单向进气气路; 由设置在对应活塞腔(13¾上的通气孔、单向出气阀(133)、与底座(139)上通气孔连通的出气孔(131)构成单向出气气路;传动组件与气体导流组件连接,驱动活塞体(136)在活塞腔(135)内做往复运动。 [0007] To solve the above technical problem, the technical solution of the present invention is a micro-vacuum pump and drive assembly includes an airflow assembly, said assembly comprising a gas nozzle gas flow (130), the pressure piece (134) and the piston has at least two piston chamber (135) (136): compact (134) of the piston chamber (13¾ above and provided with a corresponding piston chamber (13¾ vent hole in communication with a portion of a one-way air vent hole valve (132), the vent hole is provided at another portion of the unidirectional valve (133); a gas nozzle (130), one-way inlet valve (132), and the corresponding piston chamber vent (13¾ constituting an intake air passage way ; provided by the corresponding piston chamber (vent holes on 13¾, a one-way valve (133), the base (139) on the communication vent hole (131) constituting the air outlet passage-way; drive assembly with the gas flow connector assembly, the drive piston member (136) reciprocates within the piston chamber (135).

[0008] 较优地,所述传动组件包括马达(14¾、驱动轮(140)、传动轴(138)和活塞支架(137),其中:驱动轮(140)固定于马达输出轴上;活塞体(136)固定支撑在活塞支架(137) 上;传动轴(138)的一端套入驱动轮(140)的偏心安装孔中,另一端可转动支撑在活塞支架(137)后部靠近中心部位处的安装孔上。 [0008] Jiaoyou, the drive assembly includes a motor (14¾, the drive wheel (140), shaft (138) and a piston holder (137), wherein: the drive wheel (140) fixed to the motor output shaft; piston body (136) fixedly supported on a plunger carriage (137); an end of the eccentric shaft mounting hole (138) is set into a drive wheel (140), the other end rotatably supported on the plunger carriage (137) at a central portion close to the rear the mounting holes.

[0009] 较优地,驱动轮(140)的偏心安装孔为球面孔;活塞支架(137)后部靠近中心部位处的安装孔为球面孔;传动轴(138)的两端近似呈球面状。 [0009] Jiaoyou, the driving wheel (140) eccentric mounting hole faces a ball; a piston holder (137) near the rear of the mounting hole at a central portion of a spherical face; both ends of the shaft (138) is substantially spherical .

[0010] 较优地,驱动轮(140)的偏心安装孔、活塞支架(137)后部靠近中心部位处的安装孔与传动轴(138)配合内侧涂有润滑油。 [0010] Jiaoyou, the driving wheel (140) eccentric mounting hole, a piston support (137) at the rear portion close to the center of the mounting hole and the drive shaft (138) fitted inside coated with lubricating oil.

[0011] 较优地,驱动轮(140)由一转轮及设置在其上端面的偏心转子组成;该驱动轮(140)直接压入马达转子(141)上。 [0011] Jiaoyou, the driving wheel (140) by an eccentric wheel and a rotor disposed on its end surface composition; the driving wheel (140) is directly pressed into the motor rotor (141).

[0012] 较优地,活塞支架(137)的装配定位孔与底座(139)的装配定位孔配合连接。 [0012] Jiaoyou, the piston holder (137) mounting the base positioning hole (139) of the mating connector assembly positioning hole.

[0013] 较优地,活塞支架(137)上设置活塞腔安装位,其中放入活塞体安装位。 [0013] Jiaoyou, the piston holder (137) disposed on the mounting position of the piston chamber, wherein the piston body into the installation position.

[0014] 较优地,活塞体(136)的底部设置弹性固定套;各活塞体(136)与对应的弹性固定套密封连接。 [0014] Jiaoyou, the bottom of the piston member (136) is provided an elastic fixing sleeve; each piston body (136) with a corresponding elastomeric sleeve secured sealed connection.

[0015] 较优地,弹性固定套位于活塞腔(13¾的底面和活塞腔(13¾的四周侧面交汇处, 可沿活塞腔(135)四周侧面向下后方延伸。 [0015] Jiaoyou, the resilient retainer bushing of the piston chamber (piston chamber and the bottom surface 13¾ (13¾ junction side of four weeks, four weeks may extend downwardly along a side surface of the rear piston chamber (135).

[0016] 较优地,活塞体(136)的多个活塞腔(13¾周边设有活塞腔密封圈。 [0016] Jiaoyou, the piston body (136) a plurality of piston chamber (13¾ peripheral seal with the piston chamber.

[0017] 与现有技术相比,在现有微型气压泵基础上,本实用新型提供了一种微型负压泵, 该设计可在气嘴处提供负压,且具有气路简单,气密性好、装配工艺简单、稳定可靠、低功耗等优点。 [0017] Compared with the prior art, the conventional micro-pump based on the pressure, the present invention provides a micro-pump vacuum, this design may be provided at a negative pressure in the gas nozzle, and the gas passage having a simple, airtight good, the assembly process is simple, reliable, low power consumption.

附图说明 BRIEF DESCRIPTION

[0018] 图1是本实用新型微型负压泵的结构示意图。 [0018] FIG. 1 is a structural diagram of the present invention, the micro vacuum pump.

[0019] 图1中,有关附图标记如下: In [0019] FIG. 1, reference numerals relating to the following:

[0020] 130——气嘴; [0020] 130-- gas nozzle;

[0021] 131——出气孔; [0021] 131-- vent;

[0022] 132——单向进气阀; [0022] 132-- way inlet valve;

[0023] 133——单向出气阀; [0023] 133-- way outlet valve;

[0024] 134-压块; [0024] 134- compact;

[0025] 135——活塞腔; [0025] 135-- piston chamber;

[0026] 136——活塞体; [0026] 136-- piston body;

[0027] 137——活塞支架; [0027] 137-- piston holder;

[0028] 138——传动轴; [0028] 138-- shaft;

[0029] 139——底座; [0029] 139-- base;

[0030] 140——驱动轮; [0030] 140-- drive wheel;

[0031] 141——马达转子; [0031] 141-- motor rotor;

[0032] 142——马达。 [0032] 142-- motor.

4具体实施方式 4 DETAILED DESCRIPTION

[0033] 为更进一步理解本实用新型的基本原理及结构,下面结合附图和实施例对本实用新型进行描述。 [0033] The invention further understanding of the basic principles and the structure of the present, in conjunction with the accompanying drawings and the following embodiments of the present invention will be described.

[0034] 参见图1,本实用新型的微型负压泵主要由气体导流组件和传动组件组成,其中: [0034] Referring to Figure 1, the present invention is mainly composed of a micro vacuum pump gas guide assembly and drive components, wherein:

[0035] 气体导流组件包括气嘴130、压块134和具有两个或两个以上活塞腔135的活塞体136 ;对应于各个活塞腔135上方的压块134上设置通气孔,它们的上面固定有单向出气阀133,且这些通气孔与活塞腔135相通。 [0035] The gas nozzle includes an air deflector assembly 130, compacts 134 having two or more piston cavity 135 of the piston 136; corresponding to the upper vent hole is provided above the respective piston chamber 135 of the compact 134, thereof a one-way outlet valve 133 is fixed, and the piston chamber 135 communicates with vent holes. 由气嘴130、单向进气阀132、通气孔、与对应活塞腔135构成单向进气气路;由设置在各个活塞腔135的相应通气孔、单向出气阀133、与底座139上的通气孔连通的出气孔131构成单向出气气路。 A gas nozzle 130, the one-way inlet valve 132, vent hole, corresponding to the piston chamber 135 constituting an intake air passage way; by a respective vent hole is provided in each piston chamber 135, a one-way valves 133, 139 on the base a vent hole 131 communicating the gas outlet passage constituting a unidirectional.

[0036] 传动组件包括马达142、驱动轮140、金属传动轴138和活塞支架137。 [0036] The drive assembly includes a motor 142, a drive wheel 140, the metal bracket 137 and the piston shaft 138. 各个活塞体136的底部设置弹性固定套,活塞体136与对应的弹性固定套密封连接,驱动轮140固定于马达输出轴上,活塞体136固定支撑在活塞支架137上,传动轴138的一端套入驱动轮140 相应孔位上,传动轴138的另一端可转动支撑在所述活塞支架137的后部靠近中心部位处。 An elastic member provided at the bottom of each of the piston sleeve 136 is fixed to the piston 136 with a corresponding elastomeric sleeve secured sealed connection, the drive wheel 140 fixed to the motor output shaft 136 fixedly supported on the piston body of the piston holder 137, one end 138 of the shaft sleeve into corresponding holes 140 on the drive wheel, the other end of the drive shaft 138 is rotatably supported at a rear portion of the bracket 137 near the center of the piston.

[0037] 进一步地,前述弹性固定套位于各个活塞腔135的底面和活塞腔135的四周侧面交汇处,可沿四周侧面向下后方延伸。 [0037] Further, the elastic sleeve fixed to the piston chamber 135 is located in the bottom surface of each of four weeks and a piston chamber side surface of the junction 135 can extend downwardly along the rear side four weeks.

[0038] 如图1所示,本实用新型中的所述驱动轮140是由一个转轮及设置在上面的偏心球面孔组成,在所述活塞支架137后部靠近中心部位处开设有球面孔;所述金属传动轴138 的两端基本呈球面状,其一端位于所述活塞支架137的偏心球面孔内,另一端位于所述驱动轮140的球面孔内。 [0038] As shown, in the present invention, the drive wheel 1140 is composed of a wheel disposed above and eccentric ball faces, defines a ball at a site near the center of the face in the rear of the piston holder 137 ; ends of the metal shaft 138 of substantially spherical shape, having one end located within the eccentric bracket ball face of the piston 137, the other end of the inner ball face 140 of the drive wheel. 并且,驱动轮140的偏心球面孔和活塞体支架137的偏心球面孔与金属传动轴138配合内侧涂有润滑油。 And the eccentric face and the metal ball faces the ball eccentric drive wheel 140 and the piston 137 of the stent body with the inner shaft 138 is coated with a lubricant.

[0039] 本实用新型的装配过程十分简单,简述如下: [0039] The present invention is very simple assembly process, summarized as follows:

[0040] 传动组件包括马达142、底座139、马达固定螺丝、驱动轮140、传动轴138、活塞支架137等组件,其中:马达142底部有马达接线端子;底座139上设置有整体装配使用的定位孔及出气孔。 [0040] The drive assembly includes a motor 142, a base 139, a motor fixing screws, drive wheel 140, shaft 138, the bracket 137 of the piston assembly and the like, wherein: a bottom having a motor terminals 142; 139 is provided on the base integrally assembled using a positioning and a vent hole. 装配时,底座139通过两颗加有弹簧垫片的固定螺丝与马达142上的螺丝孔进行紧固;驱动轮140是由一个转轮及设置在其上端面的偏心转子组成,该驱动轮140直接压入马达输出轴上;在活塞支架137后部的中心开设有球面孔,活塞支架137利用装配定位孔与底座139装配定位孔配合连接;并利用两端基本呈球面状的金属传动轴138将活塞支架137和驱动轮140连接起来,其中将传动轴138 —端的球面任意插入驱动轮140端面上的球面导向孔,具体将传动轴138另一侧端部的球面孔自然放入活塞支架137的球面孔内;最后在活塞支架137上球面孔以及驱动轮140上面的偏心球面孔涂上润滑油;至此,传动组件安装完毕。 When assembled, the base 139 is fastened by two screw holes on the fixing screw 142 and the motor spring washer added; the drive wheel 140 is composed of a runner provided thereon and an eccentric rotor end surface, the drive wheel 140 pressed directly into the motor output shaft; cradle in the center of the piston 137 defines a rear face of the ball, the piston assembly 137 to the bracket 139 with the positioning hole fitted connector assembly positioning holes in the base; and using substantially spherical shape at both ends of the metal shaft 138 piston bracket 137 and drive wheel 140 are connected together, wherein the drive shaft 138 - terminal inserted into any of a spherical drive wheel spherical end surface of the guide hole 140, particularly the ball 138 faces the shaft the other end of the piston holder 137 into the natural the inner face of the ball; Finally, the piston holder 137 and the ball on the face of the eccentric drive wheel 140 above the ball faces greased; Thus, the drive assembly is installed.

[0041] 气体导流组件由固定螺丝、气嘴130,单向进气阀132、单向出气阀133、压块134、 活塞体136等组成,其中:在压板上将多个单向进气阀132装在对应的单向进气阀固定孔上;将活塞体136穿过活塞支架137上的活塞腔安装位,其中放入活塞体安装位;各个活塞腔135底部设置弹性固定套,它们位于各个活塞腔135底部与活塞腔135的四周侧面交汇处,并可沿四周侧面向下方向可延伸。 [0041] The gas guide assembly fixed by a screw, gas nozzle 130, the one-way inlet valve 132, a one-way valve 133, the compact 134, the piston 136 and other components, wherein: the plurality of one-way intake on the platen the one-way valve 132 is mounted on the fixing hole corresponding to the intake valve; piston 136 through the piston chamber mounting bracket 137 on the piston position, wherein the piston body into the mounting position; the bottom of the respective piston chamber 135 is provided an elastic fixing sleeve, which located in the bottom chamber of each piston and piston chamber 135 side junction 135 is four weeks, four weeks and may extend along a side surface in a downward direction. 出气孔道通到空气交换腔室。 The outlet channel opens into an air lock chamber. 出气孔131处有固定的单向出气阀133。 The fixing hole 131 has a one-way valve 133. 单向出气阀133与出气孔131配合。 A one-way valve 133 and vent holes 131 fitted. 活塞体136的固定套套入活塞体136安装位置中,由于活塞体136的固定套由硅橡胶制作而成,在套入后能够与上面的活塞体136紧密配合,由此增加活塞体136的多个活塞腔及多个单向进气阀132的密闭性。 The piston 136 is fixed into the condom body mounting position of the piston 136, the piston 136 is made of a fixed sleeve made of silicone rubber, it can be a close fit with the piston 136 in the upper body into the sleeve, thereby to increase the number of the piston 136 a piston chamber and a plurality of one-way inlet valve 132 is closed. 而活塞体136的多个活塞腔周边设有活塞腔密封圈,可以有效保证增加压块134与活塞腔135 的气密性。 A plurality of pistons and piston chamber surrounding the piston chamber 136 is provided with a seal, can effectively guarantee increased air tightness compact chamber 135 of the piston 134.

[0042] 最后,使用固定螺丝将气体导流组件及传动组件固定,至此完成微型负压泵的安装。 [0042] Finally, the fixing screws gas guide assembly and transmission assembly is fixed, thereby completing the installation of the micro vacuum pump.

[0043] 该微型负压泵的具体工作原理如下: [0043] The operational principles of a micro vacuum pump as follows:

[0044] 传动组件马达142加电压后,马达转子141开始转动,与马达输出轴连接的驱动轮140随马达输出轴一起转动。 After [0044] 142 voltage is the motor drive assembly, a motor rotor 141 starts rotating, driving wheel connected to the motor output shaft 140 rotates together with the motor output shaft. 驱动轮140上设有一个偏心孔,偏心孔侧边设有球面安装导向孔,传动轴138将之压入活塞支架球面安装导向孔,将它们连接。 Eccentric drive wheel 140 is provided with a hole, eccentric hole has a spherical side mounting guide hole, the shaft 138 is pressed into the guide hole of the piston holder spherically mounted, to connect them. 故当驱动轮140随马达输出轴一起转动时,驱动轮140将带动活塞体136以活塞支架137底部的球面孔为圆心做圆周摇摆运动。 Therefore, when the drive wheel when the motor 140 rotates together with the output shaft, the drive wheel 140 will drive the piston body 136 to the bottom of the ball 137 faces the center of the piston holder is a circular rocking motion. 同时,金属传动轴138在做圆周摇摆运动时,还会通过连杆带动活塞体136在活塞腔135内做往复运动。 At the same time, the metal shaft 138 at a circular rocking motion will also drive the piston through the connecting rod 136 to reciprocate within the piston chamber 135.

[0045] 当活塞体136拉伸活塞腔135时,活塞腔135内气压较小,外界气压较大,与气嘴130处气路连接的单向进气阀132被冲开,单向出气阀133被关闭;活塞体136压缩活塞腔135时,活塞腔135内气压增大,使单向进气阀132关闭,并将单向出气阀133冲开。 [0045] When the piston member 135, within the piston chamber 135 smaller stretching piston chamber 136 pressure, ambient air pressure is large, the air passage connected to the air nozzle 130 is a one-way inlet valve 132 to open washed, the one-way valve 133 is closed; 136 compression piston 135, the piston chamber 135 within the piston chamber pressure is increased, the one-way inlet valve 132 is closed, the one-way valve 133 and the impulse to open. 活塞体136在活塞腔135内往复运动过程中,气嘴130处空气经活塞腔135由出气孔131排出形成负压。 The piston 136 within the piston chamber 135 during reciprocation of the gas nozzle 130 via the air piston chamber 135 is discharged from the vent holes 131 a negative pressure. 由于活塞体136包括两个以上活塞腔135,使得一个活塞腔135吸入气体过程中可能有另一个活塞腔135排出气体,从而可保证气嘴130处负压的连续、平稳。 Since the piston 136 comprises two or more piston chamber 135, a piston chamber 135 so that the suction gas in the process chamber 135 may have other piston exhaust gases, thereby ensuring the gas nozzle 130 at a negative pressure continuously, smoothly.

[0046] 上述微型负压泵,可在气嘴130处提供持续、稳定的负压,且具有气路简单、气密性好、装配工艺简单、稳定可靠、低功耗等优点,特别适合用于NPWT设备。 [0046] the micro vacuum pump, provides a continuous, stable negative pressure at the air nozzle 130, the gas passage and having a simple, air tightness, the assembly process is simple, reliable, low power consumption, is particularly suitable for use in NPWT devices.

[0047] 以上仅是本实用新型的优选实施方式,应当指出的是,上述优选实施方式不应视为对本实用新型的限制,本实用新型的保护范围应当以权利要求所限定的范围为准。 [0047] The above are only preferred embodiment of the present invention embodiments, it should be noted that the above-described preferred embodiments should not be considered limiting the present novel practical pair protection scope of the invention should be defined by the claims scope of equivalents. 对于本技术领域的普通技术人员来说,在不脱离本实用新型的精神和范围内,还可以做出若干改进和润饰,这些改进和润饰也应视为本实用新型的保护范围。 Those of ordinary skill in the art, in the present invention without departing from the spirit and scope, may make various improvements and modifications, and these improvements and modifications should be considered within the scope of the present invention to protect.

Claims (10)

1. 一种微型负压泵,包括气流组件和传动组件,其特征在于,所述气体导流组件包括气嘴(130)、压块(134)和具有至少两个活塞腔(135)的活塞体(136):压块(134)位于活塞腔(13¾上方并设置与对应活塞腔(13¾连通的通气孔,其中一部分通气孔处设置单向进气阀(132),另一部分通气孔处设置单向出气阀(13¾ ;由气嘴(130)、单向进气阀(132)、通气孔及对应活塞腔(13¾构成单向进气气路;由设置在对应活塞腔(13¾上的通气孔、单向出气阀(133)、与底座(139)上通气孔连通的出气孔(131)构成单向出气气路;传动组件与气体导流组件连接,驱动活塞体(136)在活塞腔(135)内做往复运动。 A micro vacuum pump piston, and the drive assembly includes an airflow assembly, characterized in that the gas guide includes a gas nozzle assembly (130), the compact (134) having at least two piston chamber (135) body (136): compact (134) of the piston chamber (13¾ above and provided with a corresponding piston chamber (13¾ communication vent, wherein the vent hole is provided at a portion of the one-way inlet valve (132), the vent hole is provided at another portion a one-way valve (13¾; a gas nozzle (130), one-way inlet valve (132), and the corresponding piston chamber vent (13¾ constituting an intake air passage way; provided by the corresponding piston cavity (through the 13¾ porosity, a unidirectional valve (133), the base (139) on the communication vent hole (131) constituting the air outlet passage-way; drive assembly is connected with the gas flow assembly, the piston drive member (136) in the piston chamber reciprocating motion in (135).
2.如权利要求1所述的微型负压泵,其特征在于,所述传动组件包括马达(142)、驱动轮(140)、传动轴(138)和活塞支架(137),其中:驱动轮(140)固定于马达输出轴上;活塞体(136)固定支撑在活塞支架(137)上;传动轴(138)的一端套入驱动轮(140)的偏心安装孔中,另一端可转动支撑在活塞支架(137)后部靠近中心部位处的安装孔上。 2. A micro vacuum pump according to claim 1, wherein said drive assembly includes a motor (142), a drive wheel (140), shaft (138) and a piston holder (137), wherein: the drive wheel (140) fixed to the motor output shaft; (136) fixedly supported on the piston member of the piston holder (137); an end of the eccentric shaft mounting hole (138) is set into a drive wheel (140), the other end rotatably supported a piston on the rear bracket (137) mounted at the central portion of the aperture adjacent.
3.如权利要求2所述的微型负压泵,其特征在于,驱动轮(140)的偏心安装孔为球面孔;活塞支架(137)后部靠近中心部位处的安装孔为球面孔;传动轴(138)的两端近似呈球面状。 3. A micro vacuum pump according to claim 2, characterized in that the drive wheel (140) eccentric mounting hole faces a ball; a piston holder (137) near the rear of the mounting hole at a central portion of a spherical face; Transmission ends of the shaft (138) is substantially spherical.
4.如权利要求3所述的微型负压泵,其特征在于,驱动轮(140)的偏心安装孔、活塞支架(137)后部靠近中心部位处的安装孔与传动轴(138)配合内侧涂有润滑油。 4. A micro vacuum pump according to claim 3, characterized in that the drive wheel shaft with the mounting hole (140) eccentric mounting holes at the rear portion close to the center of the piston holder (137) (138) fitted inside coated with oil.
5.如权利要求2所述的微型负压泵,其特征在于,驱动轮(140)由一转轮及设置在其上端面的偏心转子组成;该驱动轮(140)直接压入马达转子(141)上。 5. A micro vacuum pump according to claim 2, characterized in that the drive wheel (140) consisting of a wheel disposed thereon and an eccentric rotor end surface; the driving wheel (140) pressed directly into the motor rotor ( 141) on.
6.如权利要求2所述的微型负压泵,其特征在于,活塞支架(137)的装配定位孔与底座(139)的装配定位孔配合连接。 The micro-pressure pump as claimed in claim 2, characterized in that the plunger carriage (137) mounting the base positioning hole (139) of the positioning hole fitting the mating connector.
7.如权利要求2所述的微型负压泵,其特征在于,活塞支架(137)上设置活塞腔安装位,其中放入活塞体安装位。 7. A micro vacuum pump according to claim 2, characterized in that the piston holder (137) disposed on the mounting position of the piston chamber, wherein the piston body into the installation position.
8.如权利要求1所述的微型负压泵,其特征在于,活塞体(136)的底部设置弹性固定套;各活塞体(136)与对应的弹性固定套密封连接。 8. A micro vacuum pump according to claim 1, characterized in that an elastic bottom of the piston member (136) of the mounting sleeve; each piston body (136) with a corresponding elastomeric sleeve secured sealed connection.
9.如权利要求8所述的微型负压泵,其特征在于,弹性固定套位于活塞腔(135)的底面和活塞腔(13¾的四周侧面交汇处,可沿活塞腔(135)四周侧面向下后方延伸。 9. A micro vacuum pump according to claim 8, wherein the bottom surface of the elastic fixing sleeve and the piston chamber (four weeks of the piston side chamber 13¾ junction (135), along the piston chamber (135) side to four weeks the rearward extension.
10.如权利要求1所述的微型负压泵,其特征在于,活塞体(136)的多个活塞腔(135) 周边设有活塞腔密封圈。 10. A micro vacuum pump according to claim 1, wherein the plurality of piston cavity of the piston body (136) (135) provided with a piston chamber surrounding seal.
CN 201020669428 2010-12-20 2010-12-20 Miniature negative pressure pump CN201953601U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2773383B1 (en) 2011-11-02 2018-03-28 Smith & Nephew PLC Reduced pressure therapy apparatuses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2773383B1 (en) 2011-11-02 2018-03-28 Smith & Nephew PLC Reduced pressure therapy apparatuses

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