CN213981127U - Micro fluid pump and pressure fluid application equipment - Google Patents

Abstract

The utility model provides a miniature fluid pump and pressure fluid application apparatus, this miniature fluid pump includes: a motor having a motor shaft extending along an axis; a main housing connected to the motor and defining an accommodating space; a diaphragm body mount coupled to the main housing, the diaphragm body mount having a diaphragm body with a plurality of diaphragm units disposed thereon; a rotating wheel crankshaft assembly that receives torque transferred by the motor to rotate and is connected to the diaphragm body to drive the reciprocating compression and suction motions of the diaphragm unit; the diaphragm body mounting seat is provided with a plurality of mounting concave parts corresponding to the diaphragm units respectively, and each mounting concave part comprises a bowl-shaped supporting part and a mounting hole arranged at the bottom of the bowl-shaped supporting part; wherein the mounting hole is formed as an elliptical mounting hole.

Description

Micro fluid pump and pressure fluid application equipment

Technical Field

The utility model relates to a fluid pump field, more specifically relate to a miniature fluid pump and pressure fluid application apparatus.

Background

With the widespread use of fluid pumps in both residential and commercial applications, increased demands have been placed on fluid pumps, particularly micro-fluid pumps.

Current micro fluid pumps (e.g., micro water pumps) generally include a motor, a main housing, a water bladder mount on which a water bladder body is mounted, particularly, the water bladder unit of the current water bladder body generally has a circular shape, and a curved rod transmission assembly to which a corresponding water bladder unit of the water bladder body is mounted. In an operating state, the crank transmission assembly receives torque transmitted by the motor to rotate and drives the water bag unit on the water bag mounting seat to perform reciprocating compression and suction motions, so that fluid with preset pressure is output. However, when the water bag unit is in a high-speed movement state, due to the movement inertia of the water bag unit, the water bag unit (for example, the mounting post of the water bag unit engaged with the water bag hole) will form a movement track with a non-circular shape, and the circular mounting hole adopted at this time will not be well adapted to the water bag unit, so that the water bag unit cannot be well supported, and the performance and output stability of the micro fluid pump are affected.

Therefore, there is a need for a micro fluid pump capable of outputting high pressure fluid, which has good performance and stability, and which has a long service life.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a miniature fluid pump and pressure fluid application apparatus. Utilize the utility model provides a miniature fluid pump and pressure fluid application apparatus can improve the performance of this fluid pump and stability effectively on the basis of exporting high-pressure fluid well, and this miniature fluid pump has longer life.

According to an aspect of the present invention, a micro fluid pump is provided, including: a motor having a motor shaft extending along an axis; a main housing connected to the motor and defining an accommodating space; a diaphragm body mount coupled to the main housing, the diaphragm body mount having a diaphragm body with a plurality of diaphragm units disposed thereon; a rotating wheel crankshaft assembly that receives torque transferred by the motor to rotate and is connected to the diaphragm body to drive the reciprocating compression and suction motions of the diaphragm unit; the diaphragm body mounting seat is provided with a plurality of mounting concave parts corresponding to the diaphragm units respectively, and each mounting concave part comprises a bowl-shaped supporting part and a mounting hole arranged at the bottom of the bowl-shaped supporting part; wherein the mounting hole is formed as an elliptical mounting hole.

The microfluidic pump according to the present invention may further comprise one or more of the following features, alone or in combination.

In some embodiments, the elliptical mounting hole has an elliptical major axis perpendicular to a line connecting the center of the diaphragm body and the center of the corresponding diaphragm cell.

In some embodiments, the diaphragm unit includes a bladder cavity that opens above the bladder cavity and a mounting post at the bottom of the bladder cavity that passes through the mounting hole.

In some embodiments, the ratio of the major axis to the minor axis of the elliptical mounting hole is directly proportional to the speed of operation of the motor.

In some embodiments, the capsule cavity of the diaphragm unit is supported on the bowl-shaped support.

In some embodiments, the difference between the length of the major axis of the elliptical mounting hole and the length of the minor axis of the elliptical mounting hole is in the range of 0.5mm to 1mm when the motor speed is in the range of 2000rad/min to 2500 rad/min.

In some embodiments, the difference between the length of the major axis of the elliptical mounting hole and the length of the minor axis of the elliptical mounting hole is 0.7 mm.

In some embodiments, the micro fluid pump further comprises: a valve seat sealingly coupled to a diaphragm body mount, the diaphragm body at least partially sandwiched between the diaphragm body mount and the valve seat; and wherein the diaphragm body mount is further provided with a plurality of first flanges respectively surrounding the mounting recesses and extending toward the valve seat, the valve seat being provided with a plurality of second flanges extending toward the diaphragm body mount at positions corresponding to the plurality of first flanges, the diaphragm unit being sandwiched between the respective first and second flanges.

According to another aspect of the present disclosure, a pressurized fluid application apparatus is provided, comprising a micro fluid pump as described above.

The pressure fluid application device according to the present invention may further comprise one or more of the following features, alone or in combination.

In some embodiments, the device is a coffee maker.

In some embodiments, the coffee maker is an espresso maker.

In some embodiments, the device is a dental prophylaxis device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts. The following drawings are not intended to be drawn to scale in actual size, with emphasis on illustrating the principles of the invention.

FIG. 1 illustrates an exploded view of a micro fluid pump 100 according to an embodiment of the present disclosure;

FIG. 2A illustrates a perspective view of a micro fluid pump 100 according to an embodiment of the present disclosure;

FIG. 2B illustrates a cross-sectional view of the micro fluid pump 100, according to an embodiment of the present disclosure;

FIG. 3 illustrates a perspective view of a diaphragm body 160 according to an embodiment of the present disclosure;

FIG. 4 illustrates a partial view of diaphragm body mount 130 according to an embodiment of the present disclosure;

FIG. 5 illustrates a partial cross-sectional view of a diaphragm body 160 and a diaphragm body mount 130 according to an embodiment of the present disclosure;

FIG. 6 illustrates a perspective view of a valve seat 140 according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without any creative effort also belong to the protection scope of the present invention.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

Current micro fluid pumps (e.g., micro water pumps) generally include a motor, a main housing, a water bladder mount on which a water bladder body is mounted, particularly, the water bladder unit of the current water bladder body generally has a circular shape, and a curved rod transmission assembly to which a corresponding water bladder unit of the water bladder body is mounted. In an operating state, the crank transmission assembly receives torque transmitted by the motor to rotate and drives the water bag unit on the water bag mounting seat to perform reciprocating compression and suction motions, so that fluid with preset pressure is output.

However, when the water bag unit is in a high-speed movement state, due to the movement inertia of the water bag unit, the water bag unit (for example, the mounting post of the water bag unit engaged with the water bag hole) will form a movement track with a non-circular shape, and the circular mounting hole adopted at this time will not be well adapted to the water bag unit, so that the water bag unit cannot be well supported, and the performance and output stability of the micro fluid pump are affected.

Based on the above, the present application provides a fluid pump and a pressure fluid application device, so that the performance and stability of the fluid pump are effectively improved on the basis of outputting high-pressure fluid well, and the micro fluid pump has a long service life.

According to an aspect of the present disclosure, a micro fluid pump is presented. Fig. 1 shows an exploded view of a micro fluid pump 100 according to an embodiment of the present disclosure.

Referring to fig. 1, the micro fluid pump 100 includes, for example, a motor 110, a main housing 120, a diaphragm body mount 130, and a crank drive assembly 170.

The motor 110 has a motor shaft extending along an axis, which is a rotation axis of the motor. Embodiments of the present disclosure are not limited by the speed of the motor and its type of motor.

The main housing 120 is connected to the motor 110 and defines an accommodating space, which is a space for accommodating internal components of the main housing, such as a crank gear assembly. The embodiments of the present disclosure are not limited by the specific structure of the accommodating space and the position thereof.

Fig. 2A illustrates a perspective view of the micro fluid pump 100 according to an embodiment of the disclosure, and fig. 2B illustrates a cross-sectional view of the micro fluid pump 100 according to an embodiment of the disclosure.

Referring to fig. 2A and 2B, the diaphragm mount 130 is coupled to the main housing 120. The diaphragm body mount 130 is coupled to the main housing 120, for example, via a snap fit, or it may be otherwise coupled to the main housing. Embodiments of the present disclosure are not limited by the manner in which the diaphragm body mount 130 is coupled to the main housing 120.

With continued reference to FIG. 1, the diaphragm body mount 130 is provided with a diaphragm body 160 having a plurality of diaphragm elements 161 (diaphragm elements 161 are shown in FIG. 3). For example, the diaphragm body 160 may be, for example, a plurality of integrally formed water bladders (e.g., upper openings), wherein each water bladder is a diaphragm unit.

A bell crank drive assembly 170 receives torque from the motor 110 for rotation and is coupled to the diaphragm body 160 to drive the reciprocating compression and pumping motion of the diaphragm unit. The crank transmission assembly 170 may be disposed inside the main housing, i.e. in the accommodating space.

For example, the knee lever transmission assembly 170 may further include: an eccentric 171 provided with an eccentric hole, an eccentric shaft 172 inserted in the eccentric hole of the eccentric wheel (the eccentric shaft is disposed at an angle to the output shaft of the motor), and a crank bracket assembly 173 connected to the eccentric shaft, so that it can receive torque from the motor through the eccentric wheel and realize rotation based on the torque, and make the crank bracket assembly perform a repetitive extrusion swing motion based on the rotation of the eccentric wheel. However, it should be understood that the crank drive assembly may also include other components or have other compositions, such as a gear drive assembly 174, for example, to transfer the torque of the motor to the eccentric, depending on the actual requirements. Embodiments of the present disclosure are not limited by the specific manner of construction of the bell crank drive assembly, so long as the bell crank drive assembly is capable of driving the reciprocating compression and suction movements of the diaphragm unit based on the torque received from the motor.

The reciprocating compression and suction motion is that the diaphragm units in the diaphragm body are alternately in a compression state and a stretching state. For example, if the diaphragm body is a water bag body including a plurality of water bag units, when the knee lever bracket assembly moves downwards and pulls down the water bag units, the water bag units are in a pumping movement process, the air pressure in the water bag units is reduced, and fluid enters the water bag units; on the contrary, when the knee lever bracket assembly moves upwards and presses the water sac unit, the water sac unit is in the compression movement process, the air pressure in the water sac unit rises, and therefore the fluid with high pressure is output.

FIG. 3 illustrates a perspective view of a diaphragm body 160 showing a diaphragm body unit 161, according to an embodiment of the present disclosure. FIG. 4 illustrates a partial view of diaphragm body mount 130 according to an embodiment of the present disclosure. Referring to fig. 3 and 4, the diaphragm body mounting seat 130 is provided with a plurality of mounting recesses 131 corresponding to the plurality of diaphragm units 161 of the diaphragm body 160. The mounting recess 131 is a portion of the diaphragm body mount for contacting the diaphragm unit to effect assembly of the diaphragm body to the diaphragm body mount.

FIG. 5 illustrates a partial cross-sectional view of a diaphragm body 160 and a diaphragm body mount 130 according to an embodiment of the present disclosure. Referring to fig. 4 and 5, the diaphragm unit 161 of the diaphragm body 160 is supported by the mounting recess 131 of the diaphragm body mounting seat 130, and the mounting recess 131 includes a bowl-shaped support portion 132 and a mounting hole 133 provided at the bottom of the bowl-shaped support portion 132. The bowl-shaped support 132 is a support section having a bowl-shaped arc surface in the mounting recess 131.

The diaphragm unit 161 is, for example, a circular diaphragm unit, or it may have other shapes. Embodiments of the present disclosure are not limited by the particular shape of the diaphragm unit.

And wherein, referring to fig. 3 and 4, the mounting hole 133 is an elliptical mounting hole. It should be appreciated that the present application is not limited by the particular size of the oval-shaped mounting hole.

It should be understood that, according to actual needs, the micro fluid pump 100 may further include, for example, a valve seat 140, an upper cover 150 or other components, and as shown in fig. 2A and 2B, the upper cover 150, the valve seat 140, the diaphragm body mounting seat 130, the main housing 120 and the motor 110 are hermetically mounted in sequence, for example, from top to bottom.

Based on the above, in the present application, the mounting concave portion provided with the diaphragm body mounting seat has the bowl-shaped supporting portion and the mounting hole provided at the bottom of the bowl-shaped supporting portion, and compared with the technical scheme that the avoiding portion is provided in the diaphragm body mounting seat to avoid the outer surface of the bladder cavity of the diaphragm unit, by providing the bowl-shaped supporting portion in the present application, when the micro fluid pump is in the operating state, the problem that the diaphragm unit of the diaphragm body is elastically expanded due to the high pressure inside the diaphragm unit and the pressure inside the diaphragm unit is reduced is prevented, so that the pressure of the fluid output by the micro fluid pump can be effectively increased, the operating performance of the micro water pump is improved, the output stability of the micro fluid pump is also improved, and the micro fluid pump can continuously and stably output the high-pressure (for example, 10 bar pressure) fluid. Simultaneously, through setting up bowl form supporting part, when operating condition, this bowl form supporting part can bear the backpressure who comes from diaphragm unit (its inside has the high pressure) to reduce high-pressure diaphragm unit effectively and to the backpressure of curved bar bracket component, improved the atress condition of curved bar bracket component, also improved miniature fluid pump's life. Further, by arranging the mounting hole to be an elliptical mounting hole, when the micro water pump works and the diaphragm unit runs at a high speed, the elliptical mounting hole can be well adapted to an elliptical track generated by the diaphragm unit (such as a mounting column of the diaphragm unit) due to motion inertia, so that the diaphragm unit is well supported.

In some embodiments, the elliptical mounting hole has an elliptical major axis perpendicular to a line connecting the center of the diaphragm body and the center of the corresponding diaphragm cell.

The center of the diaphragm body is used for representing the geometric center point of the diaphragm body, and the center of each diaphragm unit is used for representing the geometric center point of each diaphragm unit.

For example, referring to fig. 3, a center point P of the diaphragm body and a center point M of one diaphragm unit are shown, a connecting line of the center point P of the diaphragm body and the center point M of the diaphragm unit is shown by a dotted line, and a direction Lh in which a major axis of the elliptical mounting hole is located is shown by a dotted line (which is shown as a straight line perpendicular to a connecting line of the center of the diaphragm body and the center of the corresponding diaphragm unit on a plane of the mounting hole).

Through the connecting line of the oval major axis of the oval mounting hole perpendicular to the center of the diaphragm body and the center of the corresponding diaphragm unit, when the micro fluid pump is in a working state, the diaphragm unit in the micro fluid pump generates deformation of a motion track in a tangential direction due to high-speed motion and forms an oval track, the oval mounting hole can be well adapted to the diaphragm unit, for example, a bottom mounting column of the diaphragm unit is well adapted, so that the support of the diaphragm unit is favorably realized, the output stability of the micro fluid pump is improved, and the micro fluid pump can continuously and stably output high-pressure (for example, 10 bar pressure) fluid.

In some embodiments, referring to fig. 5, the diaphragm unit 161 includes a bladder cavity 1611 and a mounting post 1612 at the bottom of the bladder cavity, the bladder cavity 1611 being open above, the mounting post 1612 passing through the mounting hole 133.

The capsule cavity is a section of the diaphragm unit for containing fluid, and the mounting column is a section of the diaphragm unit for realizing assembly with the diaphragm body mounting seat. The mounting post may be cylindrical, for example.

The capsule cavity may be made of an elastic material, for example rubber, or it may be made of other materials. Embodiments of the present disclosure are not limited by the specific materials of construction of the capsule cavity.

Based on the above, include the bag cavity and be located the erection column of bag cavity bottom through setting up this diaphragm unit, make the good equipment that can realize diaphragm unit and diaphragm body mount pad, and make after the erection column is installed to this mounting hole, when this miniature fluid pump operates, this oval-shaped mounting hole can well adapt this diaphragm unit's erection column because the oval orbit that inertia when high-speed operation produced, thereby be favorable to realizing the support to this diaphragm unit well, improve this miniature fluid pump's output stability.

In some embodiments, referring to fig. 4, the ratio of the major axis a to the minor axis b of the elliptical mounting hole is proportional to the operating speed of the motor. Specifically, as the operating speed of the motor increases, the ratio of the major axis to the minor axis of the elliptical mounting hole increases.

Based on the above, the ratio of the major axis to the minor axis of the oval mounting hole is set in direct proportion to the operating speed of the motor, so that the corresponding oval hole shape can be set to match with the motor based on different operating speeds of the motor of the micro fluid pump, and when the micro fluid pump operates, the oval mounting hole can be well adapted to the oval track generated by the inertia of the diaphragm unit during high-speed operation, thereby being beneficial to well supporting the diaphragm unit.

In some embodiments, the capsule cavity of the diaphragm unit is supported on the bowl-shaped support.

For example, the capsule cavity may be supported, for example, only partially on the bowl-shaped support, or the capsule cavity may be supported entirely on the bowl-shaped support. Embodiments of the present disclosure are not limited by the specific area of engagement of the capsule cavity with the bowl support and the area of engagement thereof.

Based on the above, through setting up the bag cavity of diaphragm unit supports on this bowl form supporting part, the bowl form supporting part of the installation concave part in this diaphragm body mount pad can also with the good adaptation of the bag cavity of corresponding diaphragm unit to realize the support to the bag cavity of this diaphragm unit better, and be favorable to further improving micro-water pump's high-pressure output performance and stability.

In some embodiments, the difference between the length of the major axis of the elliptical mounting hole and the length of the minor axis of the elliptical mounting hole is in the range of 0.5mm to 1mm, for example, when the motor speed is in the range of 2000rad/min to 2500 rad/min.

By setting the difference between the length of the major axis and the length of the minor axis of the elliptical mounting hole to be in the range of 0.5mm to 1mm when the motor rotates at a speed in the range of 2000rad/min to 2500rad/min, the elliptical mounting hole can be well adapted to the elliptical trajectory of the diaphragm unit (e.g., the mounting post of the diaphragm unit) due to inertia during high-speed operation within a specific rotation speed range of the motor, thereby achieving good support of the diaphragm unit.

In some embodiments, the difference between the length of the major axis of the elliptical mounting hole and the length of the minor axis of the elliptical mounting hole is 0.7mm when the motor speed is in the range of 2000rad/min to 2500 rad/min.

Based on the above, by setting the difference between the length of the major axis and the length of the minor axis of the elliptical mounting hole to 0.7mm when the range corresponding to the motor rotation speed is 2000rad/min to 2500rad/min, the elliptical mounting hole can be optimally fitted to the elliptical locus of the diaphragm unit (e.g., the mounting post of the diaphragm unit) due to the inertia at the time of high-speed operation within the specific rotation speed range of the motor, thereby achieving good support of the diaphragm unit.

With further reference to fig. 5, in some embodiments, the capsule cavity 1611 of the diaphragm unit 161 includes an arcuate thin-walled portion 1611A and a thickened bottom portion 1611B, the mounting post 1612 is disposed at the thickened bottom portion 1611B, and the bowl-like support 132 supports at least a portion of the arcuate thin-walled portion 1611A.

The thickened bottom is the section of the diaphragm unit capsule cavity having a thickness greater than the arcuate thin-walled portion, and embodiments of the present disclosure are not limited by the particular thickness values employed for the thickened bottom.

The bowl support 132 may be described in greater detail as supporting at least a portion of the curved wall 1611A. For example, the bowl-shaped support portion 132 supports only half of the arc-shaped thin wall portion 1611A, or a section of a quarter of the arc-shaped thin wall portion, for example. Alternatively, the bowl-shaped support portion 132 may support the entire arc-shaped thin wall portion 1611A.

Based on the above, on the one hand, including arc thin wall portion and bodiness bottom through the bag cavity that sets up this diaphragm unit for the part that this bag cavity is connected with the erection column has better resistance to compression and tensile strength, is favorable to improving diaphragm unit self life and intensity, and is favorable to preventing this bag cavity by wearing and tearing effectively at the diaphragm unit in-process that carries out reciprocal compression and suction motion. On the other hand, at least one part of the arc-shaped thin wall part is supported by the bowl-shaped supporting part, so that the elastic expansion of the capsule cavity under high pressure can be effectively prevented, the reverse pressure of the capsule cavity under high pressure is borne, the stress condition of the curved rod transmission assembly is improved, and the output of high-pressure fluid is ensured.

In some embodiments, the diaphragm body mount is made of plastic, and the diaphragm body is made of rubber. Through setting up this diaphragm body mount pad and this diaphragm body and be plastic and rubber material respectively for the diaphragm body mount pad that the rigid material that has great intensity and rigidity made can well bear the diaphragm body that has less intensity and rigidity, thereby realizes the good joint between the two. And the diaphragm body can be alternately in a compression state and a stretching state in the process of reciprocating compression and suction movement by adopting the elastic rubber material, so that the suction of the fluid and the output of the high-pressure fluid are well realized.

In some embodiments, referring to fig. 1, the micro fluid pump further comprises a valve seat 140. The valve seat 140 is sealingly coupled to the diaphragm body mount 130, and the diaphragm body 160 is at least partially sandwiched between the diaphragm body mount 130 and the valve seat 140.

FIG. 6 illustrates a perspective view of a valve seat 140 according to an embodiment of the present disclosure. Referring to fig. 4 and 6, the diaphragm body mount 130 is further provided with a plurality of first flanges 134 respectively surrounding the mounting recesses 133 and extending toward the valve seat, the valve seat 140 is provided with a plurality of second flanges 144 extending toward the diaphragm body mount 130 at positions corresponding to the plurality of first flanges 134, and the diaphragm units are sandwiched between the respective first and second flanges 134 and 144.

For example, the diaphragm body mount and the valve seat may both be made of a rigid material, e.g. a plastic material, and the diaphragm body may for example be made of a rubber material, so that a less rigid rubber material can be well clamped in the diaphragm body mount and the valve seat having a higher stiffness and rigidity.

For example, the first and second flanges may have a circular shape, or they may have an elliptical shape. It should be understood that embodiments of the present disclosure are not limited by the particular configurations of the first and second flanges.

Based on the above, by providing the diaphragm body mount with the plurality of first flanges that respectively surround the mounting recesses and extend toward the valve seat, and providing the valve seat with the plurality of second flanges that extend toward the diaphragm body mount at positions corresponding to the plurality of first flanges, it is possible to sandwich the diaphragm unit between the corresponding first flanges and second flanges, thereby enabling a hard-to-soft seal structure to be achieved, and achieving good sealing between the valve seat, the diaphragm body, and the diaphragm body mount.

According to another aspect of the present disclosure, a pressure fluid application apparatus is provided that includes a micro fluid pump as described above and is capable of having the functions and advantages as described above.

In some embodiments, the device is a coffee maker. The coffee machine may be, for example, an espresso machine, or it may also be an american coffee machine, or it may also be another type of coffee machine. Embodiments of the present disclosure are not limited by the particular type of coffee maker.

In some embodiments, the coffee maker is an espresso maker. By using the micro fluid pump, the coffee machine can stably and continuously output fluid with the pressure of about 10 bar, so that pure espresso coffee can be brewed, and the espresso coffee machine has good performance.

In some embodiments, the device is a dental prophylaxis device. The fluid pressure applying device may be, for example, a household dental prophylaxis device, or it may also be a medical dental prophylaxis device. Embodiments of the present disclosure are not limited by the field of application of the dental rinser.

This application uses specific words to describe embodiments of the application. Reference to "a first/second embodiment," "an embodiment," and/or "some embodiments" means a feature, structure, or characteristic described in connection with at least one embodiment of the application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The foregoing is illustrative of the present invention and is not to be construed as limiting thereof. Although a few exemplary embodiments of this invention have been described, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention. Accordingly, all such modifications are intended to be included within the scope of this invention as defined in the claims. It is to be understood that the foregoing is illustrative of the present invention and is not to be construed as limited to the specific embodiments disclosed, and that modifications to the disclosed embodiments, as well as other embodiments, are intended to be included within the scope of the appended claims. The invention is defined by the claims and their equivalents.

List of reference numerals

100 micro fluid pump

110 motor

120 main casing

130 diaphragm body mounting base

131 mounting recess

132 bowl-shaped supporting part

133 mounting hole

134 first flange

140 valve seat

144 second flange

150 upper cover

160 diaphragm body

161 diaphragm unit

1611A arc thin wall part

1611B thickened bottom

1612 mounting post

170 curved bar transmission assembly

171 eccentric wheel

172 eccentric shaft

173 curved bar support assembly

174 Gear drive assembly

Center point of P diaphragm body

Center point of M diaphragm unit

The direction of the long axis of the Lh oval mounting hole

a major axis of the oval mounting hole

b minor axis of the oval mounting hole.

Claims (12)

1. A micro fluid pump, comprising:

a motor having a motor shaft extending along an axis;

a main housing connected to the motor and defining an accommodating space;

a diaphragm body mount coupled to the main housing, the diaphragm body mount having a diaphragm body with a plurality of diaphragm units disposed thereon;

a rotating wheel crankshaft assembly that receives torque transferred by the motor to rotate and is connected to the diaphragm body to drive the reciprocating compression and suction motions of the diaphragm unit;

the diaphragm body mounting seat is provided with a plurality of mounting concave parts corresponding to the diaphragm units respectively, and each mounting concave part comprises a bowl-shaped supporting part and a mounting hole arranged at the bottom of the bowl-shaped supporting part;

wherein the mounting hole is formed as an elliptical mounting hole.

2. The micro-fluid pump of claim 1, wherein the elliptical mounting hole has an elliptical major axis perpendicular to a line connecting the center of the diaphragm body and the center of the corresponding diaphragm cell.

3. The micro fluid pump as claimed in claim 1, wherein the diaphragm unit comprises a bladder cavity opened at an upper side thereof and a mounting post at a bottom of the bladder cavity, the mounting post passing through the mounting hole.

4. The micro fluid pump as claimed in claim 1, wherein a ratio of the major axis to the minor axis of the elliptical mounting hole is proportional to the operating speed of the motor.

5. The micro fluid pump of claim 3, wherein the capsule of the diaphragm unit is supported on the bowl-shaped support.

6. The micro fluid pump as claimed in claim 1, wherein the difference between the length of the major axis of the oval mounting hole and the length of the minor axis of the oval mounting hole is in the range of 0.5mm to 1mm when the motor speed is in the range of 2000rad/min to 2500 rad/min.

7. The micro fluid pump as claimed in claim 6, wherein the difference between the length of the major axis of the oval mounting hole and the length of the minor axis of the oval mounting hole is 0.7 mm.

8. The micro fluid pump of claim 1, further comprising:

a valve seat sealingly coupled to a diaphragm body mount, the diaphragm body at least partially sandwiched between the diaphragm body mount and the valve seat;

and wherein the diaphragm body mount is further provided with a plurality of first flanges respectively surrounding the mounting recesses and extending toward the valve seat, the valve seat being provided with a plurality of second flanges extending toward the diaphragm body mount at positions corresponding to the plurality of first flanges, the diaphragm unit being sandwiched between the respective first and second flanges.

9. A pressurized fluid application apparatus comprising a micro fluid pump according to any one of claims 1 to 8.

10. The apparatus of claim 9, wherein the apparatus is a coffee maker.

11. The apparatus of claim 10, wherein the coffee machine is an espresso machine.

12. The apparatus of claim 9, wherein the apparatus is a dental prophylaxis device.

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