Micro fluid pump and pressure fluid application device including the same

Abstract

The present invention relates to a micro fluid pump, the 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 rotating wheel receiving the torque transmitted by the motor and rotating and having an eccentric swing shaft arranged thereon; a diaphragm body mounting seat connected to the main housing, the diaphragm body mounting seat being provided with a diaphragm body having a plurality of diaphragm units; a curved rod having a first end connected to the swing shaft and a second end opposite to the first end connected to the diaphragm body to drive the diaphragm unit to reciprocate compression and suction movements; wherein the fluid pump further comprises a support member fixed relative to the main housing and supporting the curved rod along the direction of the axis. The present invention also relates to a pressure fluid application device including the above-mentioned micro fluid pump, such as a tooth washer, a coffee machine, in particular an espresso machine.

Description

Technical Field

[0001] The present invention relates to a micro fluid pump and also relates to a pressure fluid application device comprising the micro fluid pump, such as a tooth washer and a coffee machine, in particular an Italian coffee machine. Background Art

[0002] Micro fluid pumps have a wide range of application scenarios. For example, micro water pumps can be installed in different pressure fluid application equipment, such as coffee machines and toothbrushes. The fluid pump draws water into them and then pumps the water out at the required pressure. However, different pressure fluid application equipment has different requirements for the pressure of the pumped fluid. For example, in an American coffee machine, qualified American coffee can be produced when the pressure of the pumped water reaches 1 bar. However, for espresso, the pressure of the pumped water is required to reach about 9 bars, the water temperature is 90 degrees, and a cup of 30 ml of espresso needs to be brewed within 30 seconds to be qualified. In addition, in addition to high pressure, the pressure is also required to be continuous and stable, with low noise, and the volume of the application equipment installed with the fluid pump is as small as possible for easy placement.

[0003] In response to the demand for high pressure and stable water output, a known solution is to use a cam pump. The advantage of a cam pump is that it has low noise, but it is expensive because it requires high precision for the parts that cooperate with each other. Another known solution is a vibration pump, which generates strong vibrations when working, causing a lot of noise; in addition, its water output pressure is either not high enough to meet the demand, or the water output pressure cannot be sustained and stable, so it cannot be continuously operated for a long time, so it is not suitable for commercial use. Another known solution is a rotary pump, typically a vane pump, the vanes are driven to rotate by an impeller, and its advantages are low cost and long-term operation, but the rotary pump is large in size and high in cost, and is not suitable for occasions such as home coffee machines that require micro pumps. Summary of the invention

[0004] Therefore, the object of the present invention is to provide a technical solution that can solve the above-mentioned problems. This object is achieved by a micro fluid pump according to the present invention, which comprises: a motor having a motor shaft extending along an axis; a main housing connected to the motor and defining an accommodating space; a rotating wheel that receives the torque transmitted by the motor and rotates and on which an eccentric swing shaft is arranged; a diaphragm body mounting seat connected to the main housing, on which a diaphragm body having a plurality of diaphragm units is arranged; a curved rod having a first end connected to the swing shaft and a second end opposite to the first end connected to the diaphragm body to drive the diaphragm unit to reciprocate compression and suction movements; wherein the fluid pump also comprises a support member that is fixed relative to the main housing and supports the curved rod along the direction of the axis.

[0005] In the microfluid pump according to the present invention, the support is fixed relative to the main housing and supports the crankshaft along the axis direction, so that most of the high pressure generated in the reciprocating suction and compression movement of the diaphragm unit of the diaphragm body will be transmitted to the main housing via the support along the axis direction, thereby being supported by the main housing, and no longer directly transmitted to the crankshaft, the runner, a series of transmission gears and other components as in the traditional technology. As mentioned above, the high pressure of the parts of the micropump will cause them to be damaged prematurely, thereby causing problems such as the short service life of the pump; in the microfluid pump according to the present invention, the transmission path and the object of the high pressure are changed by the ingenious arrangement of the support, which not only protects the delicate and small parts in the micropump so that they can be precisely matched during a long service life, but also significantly increases the pressure of the discharged fluid of the fluid pump, and increases the pressure application range of the fluid pump (for example, from the previous 1 bar to the current 1 to 9 bars). In addition, the microfluid pump according to the present invention retains the advantages of other high-pressure pumps (for example, cam pumps, vane pumps, etc.) in the prior art due to the use of the diaphragm pump technology, including low noise, small size, low cost, etc.

[0006] In one embodiment, the support member includes a support body and a support protrusion protruding from the support body toward the diaphragm body mounting seat, and the bent rod is supported on the support protrusion. Thus, the bent rod can be supported in a high-pressure working environment and the obstruction of the support protrusion to the movement of the bent rod is reduced.

[0007] In one embodiment, the support protrusion is spherical or conical, so that point contact is formed between the curved rod and the support member, which is conducive to minimizing the obstruction of the support protrusion to the movement of the curved rod and is conducive to transferring a large pressure to the main housing.

[0008] In one embodiment, the support protrusion is integrally formed with the support body, so that the support member is integrally formed as a single piece, which is convenient for manufacturing and installation.

[0009] In one embodiment, the support protrusion and the support body are separate components.

[0010] In one embodiment, the support protrusion is tightly fitted to the support body. Therefore, during the operation of the fluid pump, when the crankshaft moves driven by the swing shaft, the support protrusion supporting the crankshaft does not move with the crankshaft due to the tight fit with the support body, but is fixed relative to the support body, which is conducive to the stability of the overall structure and the effective transmission of high pressure.

[0011] In one embodiment, the supporting protrusions are steel protrusions, ceramic protrusions, or cemented carbide protrusions.

[0012] In one embodiment, the support member is fixedly connected to at least a portion of the main housing, or is integrally formed with at least a portion of the main housing.

[0013] In one embodiment, the bent lever comprises a hollow portion, the supporting body is a supporting rod, and the supporting rod can be arranged in the hollow portion on a plane transverse to the axis. In this case, the high pressure along the axis direction will be mainly borne by the supporting rod arranged in the transverse direction, which significantly reduces the damage of the pressure to other components.

[0014] In one embodiment, the bent lever is provided with a bent lever recess that cooperates with the supporting protrusion, thereby the bent lever can be supported on the recess of the supporting member more stably.

[0015] In one embodiment, the bent lever comprises an insert, and the bent lever recess is arranged on the insert. The arrangement of the separate insert increases the range of the supportable force between the bent lever and the support member, that is, increases the size of the pressure that can be tolerated.

[0016] In one embodiment, the insert is embedded in the main body of the bent lever by overmolding. Thus, further, the insert constitutes a reinforcement of the bent lever itself, thereby improving the overall structural strength of the bent lever.

[0017] The present invention also relates to a pressure fluid application device, comprising the fluid pump as described above.

[0018] In one embodiment, the device is a coffee machine.

[0019] In one embodiment, the coffee machine is an espresso machine.

[0020] In one embodiment, the device is a household dental hygiene device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an overall schematic diagram of the assembled microfluid pump according to the present invention;

[0022] Figure 2 is a partial exploded view of an embodiment of a microfluid pump according to the present invention, which schematically shows the components of the microfluid pump and omits assembly elements;

[0023] Figure 3 is a schematic three-dimensional diagram of a support member and a bent rod in an assembled state according to an embodiment of a microfluid pump of the present invention;

[0024] Figure 4 is a schematic cross-sectional view of a support member and a bent rod in an assembled state according to an embodiment of a microfluid pump of the present invention, taken along a plane containing an extension line of the support member and an axis of the motor;

[0025] Figure 5 is a schematic exploded view of a support member and a bent rod including an insert according to an embodiment of a microfluid pump of the present invention;

[0026] Figure 6 is a schematic exploded view of a support member and a bent rod according to an embodiment of a microfluid pump of the present invention;

[0027] Figure 7 is a schematic perspective view of a main housing of an embodiment of a micro fluid pump according to the present invention;

[0028] Figure 8 is a schematic partial axial cross-sectional view of a microfluid pump according to the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention.

[0030] In this specification, the directional expressions "up" and "down" are relative to the assembly direction A ( Figure 1 and 2 As shown in the figure, the direction which is oriented in the same direction as the assembly direction A is referred to as "upper", and the direction which is oriented in the opposite direction to the assembly direction A is referred to as "lower".

[0031] Factors for evaluating the performance of a microfluid pump include service life, accuracy of the amount of fluid discharged each time, accuracy of the total discharge amount under a long period of use (for example, the accuracy of the total discharge amount when used 100 times, 500 times, 1000 times, etc.), etc. Any component that fails to operate properly will lead to poor performance of the entire pump, and even the pump cannot continue to be used, so that the pressure fluid application equipment installed as a key component can no longer work properly. This is particularly noteworthy when high pressure is required to pump out fluid. The higher the pressure of the pumped fluid means that the pressure on each component of the fluid pump is much greater than under normal circumstances. For example, a pressure fluid application device (such as an American coffee machine) requires a fluid pressure of 1 bar, while another device that requires a higher pressure (such as an Italian coffee machine) requires a fluid pressure of up to 9 bars. If the structure of the former pump is directly copied to the latter, the pump components will be destroyed prematurely due to excessive pressure, resulting in a short service life of the latter. The microfluid pump proposed by the present invention solves the above problems well. It can be used in many pressure fluid application devices that require high-pressure fluids, and can thus be applied to a wider pressure range.

[0032] Figure 1FIG. 1 shows an overall schematic diagram of the assembled microfluid pump according to the present invention. It should be understood that Figure 1 The microfluid pump according to the present invention is only schematically shown in its entirety. Figure 1 The posture shown in the figure does not mean the state it will be in when installed in a pressure fluid application device.

[0033] The microfluid pump according to the present invention can be installed in a pressure fluid application device (not shown). For example, the microfluid pump can be a micro water pump, and the pressure fluid application device can be a coffee machine in which the micro water pump is installed. The coffee machine uses the water pumped by the micro water pump to make coffee. In particular, the pressure fluid application device is an espresso machine that requires a water pressure of up to 9 bar to be pumped out. The microfluid pump according to the present invention can also be used, for example, in a household tooth washer to provide a high-pressure and high-speed water flow to rinse teeth. In addition, the microfluid pump according to the present invention can also be an air pump. Figure 1 As shown, the micro fluid pump 100 according to the present invention comprises a motor 9 having an axis X. The motor 9 is used to provide power for the operation of the micro fluid pump.

[0034] The microfluid pump 100 further includes a main housing 1. Figure 1 As shown, the main housing 1 is connected to the motor 9 at one end thereof to be assembled therewith. For example, the bottom of the main housing 1 can be fixedly connected to the upper surface of the motor 9 to be assembled therewith.

[0035] To facilitate the following description, Figure 1 Schematically also shown is the assembly direction A. The assembly direction A is oriented from the motor 9 along the axis X towards the main housing 1 mounted thereon.

[0036] The main housing 1 may have a cylindrical outer contour, the generatrix of which may be parallel to the axis X of the motor. Figure 1 The main housing 1 shown in the figure has a substantially square columnar profile. It should be understood that the main housing 1 may have other profiles, such as a cylindrical profile or a rectangular column profile with a substantially rectangular cross section, as required. The main housing 1 defines an accommodating space 11 ( Figure 2 ), used to accommodate components of the micro fluid pump 100.

[0037] The motor 9 may have a motor shaft (not shown) extending along the axis X. Figure 2 The motor shaft of the motor 9 may protrude from a surface 91 (i.e., an upper surface 91) of the motor 9 that faces the main housing 1. For example, the motor 9 may have a substantially cylindrical motor housing, such as Figure 1 and 2As shown in , the motor shaft protrudes from the center of its circular upper surface 91. The torque of the motor 9 is output through the motor shaft and transmitted via, for example, a series of transmission gears to drive the micro fluid pump to work.

[0038] like Figure 1 and 2 As shown, the micro fluid pump 100 may include a diaphragm body mounting seat 2 on which a diaphragm body 20 may be disposed, which will be described in detail below. The diaphragm body mounting seat 2 is located at the other side of the main housing 1 relative to the motor 9 and is connected to the main housing 1.

[0039] The microfluid pump 100 may further include a valve seat 3 and an upper cover 4. One side of the valve seat 3 is connected to the diaphragm body mounting seat 2, and the other side is connected to the upper cover 4. Thus, the motor 9, the main housing 1, the diaphragm body mounting seat 2, the valve seat 3 and the upper cover 4 are connected to the diaphragm body mounting seat 2. Figure 2 , wherein the main housing 1, the diaphragm body mounting seat 2, the valve seat 3 and the upper cover 4 can be connected together by a fixing element. In one example, the fixing element can be an elongated fixing element passing through the upper cover 4, the valve seat 3, the diaphragm body mounting seat 2 and the main housing 1, such as a bolt. In another example, the upper cover 4, the valve seat 3, the diaphragm body mounting seat 2 and the main housing 1 can be fixedly connected together by a retaining spring.

[0040] Furthermore, in a plane perpendicular to the assembly direction A, the cross sections of the upper cover 4 , the valve seat 3 , the diaphragm body mounting seat 2 and the main housing 1 may also have substantially the same external shape to form an overall consistent appearance after assembly.

[0041] like Figure 2 As shown, a diaphragm body 20 is arranged on the diaphragm body mounting seat 2, and the diaphragm body 20 has a plurality of diaphragm units 21. Figure 2 The example of FIG. 2 shows a diaphragm body 20 having four diaphragm units 21. According to actual needs, the diaphragm body 20 may also have other numbers of diaphragm units, for example, 2, 3, 5, etc. For this purpose, the diaphragm body mounting seat 2 is provided with openings corresponding to the number of diaphragm units 21 for receiving each diaphragm unit 21.

[0042] Each diaphragm unit 21 may include a bowl-shaped portion 211 and a mounting handle 212. The bowl-shaped portion 211 includes an opening that opens toward the valve seat 3. The mounting handle 212 is located below the bowl-shaped portion 211 and extends downward from the bottom of the bowl-shaped portion 211. The diaphragm body 20 has a mounting plane portion 22 that connects the diaphragm units 21 together to form an integrated diaphragm body 20, for example, connecting the diaphragm units 21 together near their opening positions.

[0043] When assembling, the diaphragm body 20 is mounted on the diaphragm body mounting seat 2 from above the diaphragm body mounting seat 2, so that the mounting plane portion 22 of the diaphragm body 20 is positioned on the upper surface of the diaphragm body mounting seat 2, for example, positioned in a recess formed on the upper surface, and at least a portion of the bowl-shaped portion 211 of the diaphragm unit 21 is received in the corresponding opening of the diaphragm body mounting seat 2, and the mounting handle 212 is exposed from the other side (lower side) of the diaphragm body mounting seat 2 through the corresponding opening. Figure 2 The valve seat 3 is provided with an inlet valve 31 mounted to the valve seat 3 from below the valve seat 3, and an outlet valve 32 mounted to the valve seat from above the valve seat 3. The valve plates of the inlet valve match the diaphragm unit 21 in position, and the number is equal. It should be understood that the inlet valve can also have other forms. Figure 2 A one-piece discharge valve 32 is shown in FIG. 1 , but it should be understood that the discharge valve may also have other forms, such as a separate valve plate.

[0044] like Figure 1 and 2 As shown, the upper cover 4 is fixedly mounted to the valve seat 3 and includes an inlet 42 for allowing fluid to enter and an outlet 41 for allowing fluid to discharge.

[0045] See also Figure 2 The microfluid pump 100 according to the present invention further comprises a rotor 5. The rotor 5 can receive the torque transmitted by the motor 9 and rotate. For example, the output torque of the motor 9 can be transmitted to the rotor 5 through a series of transmission elements (for example, a series of gears).

[0046] like Figure 8 As shown, the rotating wheel 5 can be connected to the main housing by a connecting pin 51. The connecting pin 51 can have a substantially round rod form and can be made of steel. One end of the connecting pin 51 is inserted into a central circular hole provided at the bottom of the rotating wheel 5 so that the rotating wheel can rotate under the drive of the motor. The other end of the connecting pin 51 is inserted into a circular hole provided in the main housing 1, and the circular hole is provided, for example, on a boss 13 located at the bottom 101 of the main housing 1 and protruding toward the inside of the accommodating space 11.

[0047] In order to resist the high torque transmitted from the runner 5 to the connecting pin 51, the main housing 1 may include an insert 14, which is at least partially arranged around the connecting pin 51. The insert 14 may be made of steel. Thus, the connection structure between the runner 5 and the main housing 1 is strengthened, so that the related components will not be damaged even under high pressure and high torque.

[0048] The rotating wheel 5 may be provided with an eccentric swing shaft 6 on its upper side. The swing shaft 6 may be inserted into a hole on the upper side of the rotating wheel 5. The swing shaft 6 is eccentric, meaning that the extension direction of the swing shaft 6 defines an angle with the extension direction of the axis X of the motor 9.

[0049] Further, the fluid pump 100 may include a bent rod 7. The bent rod 7 is located between the runner 5 and the diaphragm body mounting seat 2 along the assembly direction A. The bent rod 7 may include a first end 701 facing the runner 5 and a second end 702 opposite to the first end 701. The second end 702 is oriented toward the diaphragm body mounting seat 2.

[0050] The first end 701 of the bent rod 7 is connected to the swing shaft 6. For example, a central hole 703 ( Figure 4 ), the center hole 703 is sleeved on the swing shaft 6, thereby realizing the connection between the curved rod 7 and the swing shaft 6.

[0051] The second end 702 of the bent rod 7 is connected to the diaphragm body 20 to drive the diaphragm unit 21 to reciprocate and compress and pump. Specifically, the second end 702 of the bent rod 7 may be provided with a bracket 71, and the number of the brackets 71 corresponds to the number of the diaphragm units 21. Figure 2 In the illustrated embodiment, the bent rod 7 includes four brackets 71. A through hole is provided at the free end of the bracket 71 for sleeved on the mounting handle 212 of the diaphragm unit 21 to drive the bowl-shaped portion 211 of the diaphragm unit 21 to reciprocately compress and pump.

[0052] When the microfluid pump is working, the torque output by the motor 9 is transmitted to the rotating wheel 5 to drive the rotating wheel 5 to rotate. The rotation of the rotating wheel 5 drives the crankshaft 7 to move through the swing shaft 6. Since the extension line of the swing shaft 6 defines a non-zero angle with the axis X, the rotation of the crankshaft 7 causes the diaphragm units 21 of the diaphragm body 20 to perform compression and suction movements in turn. When suctioning, the fluid enters the microfluid pump 100 from the inlet 42, and the inlet valve 31 on the valve seat 3 opens to allow the fluid to pass through and enter the bowl-shaped portion 211 of the diaphragm unit 21. When compressed, the fluid is squeezed out of the bowl-shaped portion 211 and the outlet valve 32 is opened, so that it is discharged to the outside of the microfluid pump 100 through the outlet 41.

[0053] In order to achieve continuous and stable high-pressure fluid output, the microfluid pump 100 according to the present invention further includes a support member 8. Figures 3 to 7 To describe the specific arrangement of the supports. Figure 3 A perspective view schematically shows the support member 8 and the bent lever 7 in an assembled state. Figure 4 A cross-sectional view of the support member 8 and the bent lever 7 in an assembled state is schematically shown. Figure 5 and Figure 6 An exploded view of the support 8 and the knee lever 7 is schematically shown, respectively. Figure 7 A perspective view schematically shows a main housing of a micro fluid pump according to the present invention.

[0054] According to the present invention, the support member 8 is fixed relative to the main housing 1 and supports the crankshaft 7 along the direction of the axis X. As a result, most of the high pressure generated in the reciprocating suction and compression movement of the diaphragm unit 21 of the diaphragm body 20 will be transmitted to the main housing via the support member 8 along the direction of the axis X, thereby being supported by the main housing 1, and no longer directly transmitted to the crankshaft, the runner, a series of transmission gears and other components as in the conventional technology. As mentioned above, the high pressure of the components of the micro pump will cause them to be damaged prematurely, thereby causing problems such as the short service life of the pump; in the micro fluid pump according to the present invention, the transmission path and the object of the high pressure are changed by the ingenious arrangement of the support member, which not only protects the delicate and small components in the micro pump so that they can be precisely matched during a long service life, but also significantly increases the pressure of the discharged fluid of the fluid pump, and increases the pressure application range of the fluid pump (for example, from the previous 1 bar to the current 1 to 9 bars). In addition, the micro fluid pump according to the present invention retains the advantages of other high-pressure pumps (for example, cam pumps, vane pumps, etc.) in the prior art due to the use of the diaphragm pump technology, including low noise, small size, low cost, etc.

[0055] Specifically, the support member 8 may include a support body 81 and a support protrusion 82 protruding from the support body 81 toward the diaphragm body mounting seat 2, and the bent rod 7 is supported on the support protrusion 82. Figures 3 to 6 As shown, the support body 81 of the support member 8 is a support rod having a substantially straight rod shape, particularly as shown in FIG. Figure 4 and Figure 5 As shown. The support rod can be made of metal, such as steel. At the same time, the curved rod 7 includes a hollow portion 72, so that the support body 81 in the form of a support rod can be arranged in the hollow portion 72 on a plane transverse to the axis X. For example, the hollow portion 72 is through, so that the support body 81 can pass through it and its two ends are fixed to the main housing 1. Here, "a direction transverse to the axis X" is understood to be a direction intersecting the axis X. Preferably, in this embodiment, the extension line Y ( Figure 4 ) is perpendicular to the axis X.

[0056] The two ends 801 and 802 of the support body 81 in the form of a support rod may be fixedly connected to at least a portion of the main housing 1. For example, the two ends 801 and 802 of the support body 81 may be assembled on corresponding assembly portions of the main housing 1 to be fixedly connected to the main housing 1. Figure 7As shown, the assembly portion is, for example, two grooves 11 and 12 provided in the upper portion of the main housing 1. The grooves 11 and 12 may, for example, be recessed from the upper surface 102 of the main housing 1 toward the direction of the motor 9 to receive the two ends of the support rod. Along the direction of the axis X, the ends of the support body 81 may be partially located in the grooves 11 and 12, or may be completely located in the grooves 11 and 12.

[0057] Furthermore, if Figure 5 As shown, the support body 81 in the form of a support rod is formed with openings 811 and 812 near the two ends, and the openings 811 and 812 respectively cooperate with the positioning protrusions 111 and 112 in the grooves 11 and 12 of the main shell 1 to ensure that the support member 8 is firmly positioned to the main shell 1.

[0058] The above describes an example in which the support body is a support rod. It should be understood that the support body may also have other forms, such as brackets of other shapes, as long as the support member can be fixed relative to the main housing 1 and support the curved rod 7 along the direction of the axis X.

[0059] Return now Figure 3 and Figure 4 The support protrusion 82 is provided on the support body 81 and protrudes from the support body 81 toward the diaphragm body mounting seat 2, so that the curved rod 7 is supported on the support protrusion 82. Specifically, the support protrusion 82 can be spherical, such as Figure 4 As shown, the apex of the ball is located on the axis X of the motor 8 . The portion of the crankshaft 7 above the hollow portion 72 is supported on the apex of the supporting protrusion 82 .

[0060] In addition, in an embodiment not shown, the supporting protrusion can be in a cone shape, such as a circular cone or a polyhedral cone shape. In this case, the curved rod 7 is supported on the vertex of the cone.

[0061] like Figure 4 As shown, the support protrusion 82 and the support body 81 are separate parts, that is, they can be separated. They can be assembled together by tightly fitting the support protrusion 82 to the support body 81. For example, the support body 81 can be provided with a protrusion mounting recess 813 for mounting the support protrusion 82 on its upper surface 811. For example, the outer surface of the spherical support protrusion 82 can cooperate with the inner edge of the protrusion mounting recess 813 so that the support protrusion 82 is tightly fitted to the support body 81. When the curved rod 7 moves driven by the swing shaft 6, the support protrusion 82 supporting the curved rod 7 does not move with the curved rod 7 due to the tight fit with the support body 81, but is fixed relative to the support body 81.

[0062] In an embodiment not shown, the support protrusion 82 may be integrally formed with the support body 81 to form a one-piece support member.

[0063] The material forming the supporting protrusion can have a variety of options. For example, the supporting protrusion can be a steel protrusion, a ceramic protrusion, or a hard alloy protrusion. Thereby, strong support can be provided for the curved rod 7 to withstand high working pressure.

[0064] The above examples describe an example in which the support member 8 is separate from the main shell 1 and fixed to the main shell 1. In an example not shown, the support member 8 can be integrally formed with a portion of the main shell 1. For example, the support body of the support member can be a bracket having a plurality of branches, the bracket being provided with a support protrusion for supporting the curved rod at its center, and the plurality of branches extending outward from the center, and the ends of the branches being fixedly connected to a section of the main shell. Thus, the entire bracket is molded together with the section of the main shell. In this case, the curved rod may include two parts, which are respectively located on both sides of the bracket and can be connected together (for example, at least one of the two parts has a connecting portion that can extend through the space between the branches to engage with a matching portion in the other part).

[0065] Reference below Figure 4-7 The bent rod 7 of the microfluid pump 100 according to the present invention is described below. Figure 4 and 6 As shown, in order to enable the bent rod 7 to be stably supported on the support protrusion 82, the bent rod 7 is provided with a bent rod recess 73 that cooperates with the support protrusion 82 on the side thereof facing the support protrusion 82. Thus, the support protrusion 82 is located between the support body 81 and the bent rod recess 73. For example, when the support protrusion 82 is separated from the support body 81, the support protrusion 82 can be clamped between the support protrusion mounting recess 813 of the support body 81 and the bent rod recess 73. The bent rod recess 73 is configured to cooperate with the support protrusion 82 in a manner that enables unimpeded movement on the support protrusion 82. For example, when the support protrusion 82 is spherical, the curvature radius of the bent rod recess 73 is greater than the curvature radius of the support protrusion 82, so that the bent rod 7 can be supported on the support member 8 and move unimpeded during the operation of the microfluid pump.

[0066] Furthermore, the curved rod 7 may further include an insert 74 ( Figure 5 ), in which case the bent lever recess 73 may be provided on the insert 74. Figure 5 and 6In the example shown, the insert 74 may have a middle section 741, and branch sections 742 and 743 extending from both ends of the middle section 741. The middle section 741 may have an elongated shape, and the middle section may be provided with a portion that expands in a direction transverse to the elongation direction thereof, so that sufficient space can be provided for setting the curved rod recess 73 that cooperates with the support protrusion 82, and sufficient structural strength can be ensured for the insert. The curved rod recess 73 may be provided on the lower surface of the expansion portion, that is, the surface facing the first end 701 of the curved rod 7. The branch sections 742 and 743 may extend parallel to each other toward the first end 701. The insert 74 may be made of a metal material, such as steel, thereby forming a rigid support with the support protrusion 82.

[0067] In a preferred example, the insert 74 is embedded in the main body of the bent lever 7 by overmolding. Thus, the insert 74 constitutes a reinforcement of the bent lever 7 itself, thereby improving the overall structural strength of the bent lever 7.

[0068] It should be understood that the structures described above and shown in the drawings are only examples of the invention, which can be replaced by other structures that exhibit the same or similar functions for obtaining the desired end result. In addition, it should be understood that the embodiments described above and shown in the drawings should be regarded as constituting only non-limiting examples of the invention, and that it can be modified in many ways within the scope of the patent claims.

Claims

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 rotating wheel, which receives the torque transmitted by the motor to rotate and on which an eccentric swing shaft is arranged; A diaphragm body mounting seat connected to the main housing, wherein a diaphragm body having a plurality of diaphragm units is disposed on the diaphragm body mounting seat, wherein the diaphragm units have a bowl-shaped portion capable of squeezing a fluid; A bent rod, a first end of which is connected to the swing shaft, and a second end opposite to the first end is connected to the diaphragm body to drive the diaphragm unit to reciprocate compression and suction motion; Wherein, the fluid pump also includes a support member, which is fixed relative to the main housing and supports the bent rod along the direction of the axis; the support member includes a support body and a support protrusion protruding from the support body toward the diaphragm body mounting seat, and the bent rod is supported on the support protrusion.

2. The microfluid pump according to claim 1, wherein: The supporting protrusion is spherical or conical.

3. The microfluid pump according to claim 1 or 2, wherein: The supporting protrusion is integrally formed with the supporting body.

4. The microfluid pump according to claim 1 or 2, wherein: The supporting protrusion and the supporting body are separate components.

5. The microfluid pump according to claim 4, wherein: The support protrusion is tightly fitted to the support body.

6. The microfluid pump according to claim 1 or 2, wherein: The supporting protrusions are steel protrusions, ceramic protrusions, or hard alloy protrusions.

7. The microfluid pump according to claim 1 or 2, wherein: The support member is fixedly connected to at least a portion of the main housing, or is integrally formed with at least a portion of the main housing.

8. The microfluid pump according to claim 1, wherein: The bent lever comprises a hollow portion, and the supporting body is a supporting rod, which can be arranged in the hollow portion on a plane transverse to the axis.

9. The microfluid pump according to claim 1, wherein: The bent lever is provided with a bent lever recess which cooperates with the supporting protrusion.

10. The microfluid pump according to claim 9, wherein: The bent lever includes a first insert, and the bent lever recess is disposed on the first insert.

11. The microfluid pump according to claim 10, wherein: The first insert is embedded in the body of the knee lever by overmolding.

12. The microfluid pump according to any one of claims 1 to 3, wherein: The rotating wheel is connected to the main housing via a connecting pin, and the main housing includes a second insert at least partially surrounding the connecting pin.

13. A pressure fluid application device comprising the micro fluid pump according to any one of claims 1 to 12.

14. The device of claim 13, wherein: The device is a coffee machine.

15. The apparatus of claim 14, wherein: The coffee machine is an espresso machine.

16. The apparatus of claim 13, wherein: The device is a household dental cleaning device.

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