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 first housing segment connected to the motor and defining an accommodating space; a second housing segment abutting against and connected to the first housing segment; a rotating wheel receiving the torque transmitted by the motor and rotating and having an eccentric swing shaft arranged thereon; a crankshaft having a first end connected to the swing shaft and a second end opposite to the first end connected to a diaphragm body to drive the diaphragm cavity of the diaphragm body to reciprocate compression and suction movements; wherein the fluid pump further comprises a support rod fixed relative to the first housing segment and supporting the crankshaft along the direction of the axis; and wherein the support rod is fixedly connected to the first housing segment and the second housing segment at the interface of the two. The present invention also relates to a pressure fluid application device comprising the above-mentioned micro fluid pump.

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 household 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 first housing segment, which is connected to the motor and defines an accommodating space; a second housing segment, which abuts against and is connected to the first housing segment; a rotating wheel, which receives the torque transmitted by the motor and rotates and is provided with an eccentric swing shaft; a curved rod, whose first end is connected to the swing shaft, and whose second end opposite to the first end is connected to the diaphragm body to drive the diaphragm cavity of the diaphragm body to reciprocate compression and suction movement; wherein, the fluid pump also includes a support rod, which is fixed relative to the first housing segment and supports the curved rod along the direction of the axis; and wherein, the support rod is fixedly connected to the first housing segment and the second housing segment at the interface of the two.

[0005] According to one embodiment, the first housing section is a main housing, the second housing section is a diaphragm body mounting seat, and a diaphragm body having a plurality of diaphragm cavities is disposed on the diaphragm body mounting seat.

[0006] According to one embodiment, the main housing is provided with a main housing receiving portion to receive a portion of the support rod along the axis, and the diaphragm body mounting seat is provided with a diaphragm seat receiving portion corresponding to the main housing receiving portion along the axis direction to receive another portion of the support rod along the axis.

[0007] This arrangement of the support rod 8 can significantly increase the pressure range of the fluid pump, and can also avoid relative displacement of the two housing segments fixed to it, especially relative displacement in the direction perpendicular to the motor axis. In the case of a high-pressure pump, the parts of the fluid pump are prone to deformation due to the high pressure, and the parts that cooperate with each other are prone to misalignment, causing the pump to malfunction or even be damaged. The support rod in the micro fluid pump according to the present invention effectively avoids this situation between the two housing segments.

[0008] According to one embodiment, the main housing receiving portion receives half of the height of the support rod along the axis, and the diaphragm seat receiving portion receives the other half of the height of the support rod along the axis.

[0009] Thus, when a lateral force tending to cause relative displacement between the first shell segment and the second shell segment occurs, the first shell segment and the second shell segment will be subjected to approximately equal lateral forces, that is, the lateral force is approximately evenly distributed to the two shell segments, thereby avoiding premature damage to one of the shell segments due to uneven force distribution.

[0010] According to one embodiment, the support rod includes a locating feature along the axis, and the main housing receiving portion has a corresponding main housing locating feature along the axis.

[0011] According to one embodiment, the positioning feature portion is a positioning recess facing the main housing, and the main housing positioning feature portion is a main housing positioning protrusion.

[0012] According to one embodiment, the positioning recess is a through hole, and the diaphragm body mounting seat includes a corresponding diaphragm seat positioning protrusion.

[0013] The characteristic structure combined with the support rod is provided on the first shell segment and / or the second shell segment which are easy to generate relative displacement, so as to strengthen the connection and fixation between the support rod and the two.

[0014] According to one embodiment, the main housing is provided with an axial assembly hole in which a pump assembly bolt is arranged, and wherein the main housing receiving portion is arranged adjacent to the axial assembly hole.

[0015] This arrangement allows the support rod and the pump assembly bolts that fix and strengthen the pump to be arranged in approximately the same plane, which is defined by the axis X and the extension line Y of the support rod 8, thereby enhancing the overall strength of the pump and further ensuring that relative displacement between adjacent casing segments is avoided.

[0016] According to one embodiment, the end of the support rod partially surrounds the axial assembly hole.

[0017] Thus, the support rod and the pump assembly bolt at least partially overlap in a direction perpendicular to the plane defined by the motor axis and the extension line of the support rod, forming a multiple reinforcement structure, which better stabilizes the mutual connection between adjacent housing segments and better avoids relative displacement therebetween.

[0018] According to one embodiment, the support rod has a straight shape or an X shape.

[0019] According to one embodiment, the support rod is provided with a support recess in which a support ball is provided. When the crankshaft moves driven by the swing shaft, the support ball supporting the crankshaft does not move with the crankshaft but is fixed relative to the support rod, and the crankshaft can move without interference.

[0020] The present invention also relates to a pressure fluid application device, which is the micro fluid pump as described above.

[0021] According to one embodiment, the pressure fluid application device is a coffee machine.

[0022] According to another embodiment, the pressure fluid application device is a household dental hygiene device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an overall schematic diagram of the assembled microfluid pump according to the present invention;

[0024] 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;

[0025] Figure 3 is a partial cross-sectional view of a support rod in an assembled state of a fluid pump according to an embodiment of the present invention, taken along a plane including an extension line of the support rod and an axis of a motor;

[0026] Figure 4 is a schematic perspective view of a main housing of an embodiment of a microfluid pump according to the present invention;

[0027] Figure 5 is a schematic three-dimensional diagram of a support rod and a curved rod in an assembled state according to an embodiment of a microfluid pump of the present invention;

[0028] Figure 6 is a schematic cross-sectional view of a support rod and a bent rod in an assembled state according to an embodiment of a microfluid pump of the present invention, taken along a plane including an extension line of the support rod and an axis of a motor;

[0029] Figure 7 is a schematic exploded view of a support rod and a bent rod including an insert according to an embodiment of a microfluid pump of the present invention;

[0030] Figure 8 is a schematic exploded view of a support rod and a bent rod according to an embodiment of a microfluid pump of the present invention. DETAILED DESCRIPTION

[0031] 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.

[0032] 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".

[0033] 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.

[0034] Figure 1 FIG. 1 shows an overall schematic diagram of the assembled microfluid pump according to the present invention. It should be understood that Figure 1The 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.

[0035] 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 out by the micro water pump to make coffee. In particular, the pressure fluid application device is an espresso machine that requires a pressure of up to 9 bar for the pumped water flow. 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 the teeth. In addition, the microfluid pump according to the present invention can also be an air pump.

[0036] like 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.

[0037] The microfluid pump 100 further includes a plurality of housing segments. Here, the housing segment means a segment forming the housing of the microfluid pump. For example, the entire housing of the pump may be formed by a plurality of segments. In a disassembled state, the individual segments may be separated, and in an assembled state, the plurality of segments may be connected to each other and assembled together to form the housing of the pump. For example, Figure 1 and 2 As shown, in one embodiment of the present invention, the fluid pump 100 may include a first housing section as a main housing 1 and a second housing section as a diaphragm body mounting seat 2. 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 may be fixedly connected to the upper surface of the motor 9 to be assembled therewith. The diaphragm body mounting seat 2 is located on the other side of the main housing 1 relative to the motor 9, abutting against and connected to the main housing 1. A diaphragm body 20 may be provided on the diaphragm body mounting seat 2, such as Figure 2 shown.

[0038] To facilitate the following description, Figure 1 The assembly direction A is also schematically shown in FIG. The assembly direction A is oriented from the motor 9 along the axial direction X towards the main housing 1 mounted thereon.

[0039] 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.

[0040] 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 2 As 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.

[0041] 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 The main housing 1, the diaphragm body mounting seat 2, the valve seat 3 and the upper cover 4 are sequentially assembled together in the assembly direction A shown in FIG. 1 , 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 pump assembly bolt 43 (such as Figure 1 In another feasible example (not shown), 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.

[0042] 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.

[0043] 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.

[0044] Each diaphragm unit 21 may include a diaphragm cavity 211 and a mounting handle 212. The diaphragm cavity 211 may have a generally bowl-like shape and include an opening that opens in the direction of the valve seat 3. The mounting handle 212 is located below the diaphragm cavity 211 and extends downward from the bottom of the diaphragm cavity 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.

[0045] 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 diaphragm cavity 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.

[0046] 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.

[0047] Please continue to see Figure 2 , the microfluid pump 100 according to the present invention further includes a runner 5. The runner 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 runner 5 through a series of transmission elements (for example, a series of gears). The runner 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 runner 5. The swing shaft 6 is eccentric, which means that the extension direction of the swing shaft 6 and the extension direction of the axis X of the motor 9 define a non-zero angle.

[0048] 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.

[0049] 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.

[0050] 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 diaphragm cavity 211 of the diaphragm unit 21 to reciprocately compress and pump.

[0051] When the microfluid pump is working, the torque output by the motor 9 is transmitted to the runner 5 to drive the runner 5 to rotate. The rotation of the runner 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 diaphragm cavity 211 of the diaphragm unit 21. When compressed, the fluid is squeezed out of the diaphragm cavity 211 and the outlet valve 32 is opened, so that the fluid is discharged to the outside of the microfluid pump 100 through the outlet 41.

[0052] In order to achieve continuous and stable high-pressure fluid output, the microfluid pump 100 according to the present invention further includes a support rod 8. Figures 3 to 8 To describe the specific arrangement of the support rods. Figure 3 The partial cross-sectional view of FIG. 1 schematically shows the position of the support rod 8 in the assembled state. Figure 4 The main housing 1 as a first housing section of the micro fluid pump according to the present invention is schematically shown in a perspective view. Figure 5 The figure schematically shows a three-dimensional view of the support rod 8 and the bent rod 7 in an assembled state according to an embodiment of the present invention. Figure 6 A cross-sectional view of the support rod 8 and the bent rod 7 in an assembled state is schematically shown. Figure 7 and Figure 8 An exploded view of the support rod 8 and the bent rod 7 is schematically shown respectively.

[0053] According to the present invention, Figure 3 In the embodiment shown, the support rod 8 has a substantially straight rod shape. The support rod can be made of metal, such as steel. The support rod 8 is fixed relative to the main housing 1 and supports the bent rod 7 along the direction of the axis X. That is, in this embodiment, the first housing section is the main housing 1, and the second housing section is the diaphragm body mounting seat 2. Figure 2As shown and as described above, a diaphragm body 20 having a plurality of (four in this example) diaphragm cavities 211 is provided on the diaphragm body mounting seat 2. In addition, the support rod 8 is fixedly connected to the main housing 1 (i.e., the first housing segment) and the diaphragm body mounting seat 2 (i.e., the second housing segment) at the interface A of the two. It should be understood that in a feasible embodiment not shown, the first housing segment may be a housing segment other than the main housing 1 and / or the second housing segment may be a housing segment other than the diaphragm body mounting seat 2.

[0054] Thus, 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 rod 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 on the parts of the micro pump will cause premature damage, thereby causing problems such as a 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 rod, which not only protects the delicate and small parts 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, or even higher). 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, refer to Figure 3 and Figure 4 The main housing 1 may be provided with main housing receiving parts 11 and 12 to receive a portion of the support rod 8 along the axis X. They are, for example, two grooves provided in the upper part of the main housing 1. The main housing receiving parts 11 and 12 may be, for example, grooves formed by being recessed from the upper surface 102 of the main housing 1 toward the direction of the motor 9, for receiving the two ends of the support rod 8.

[0056] Accordingly, the diaphragm body mounting seat 2 may be provided with diaphragm seat receiving portions 23 and 24 corresponding to the main housing receiving portions 11 and 12 along the direction of the axis X, respectively, to receive another portion of the support rod 8 along the axis X. Figure 3 As shown, for example, the diaphragm seat receiving parts 23 and 24 can be grooves formed by being recessed from the lower surface 202 of the diaphragm body mounting seat 2 toward the valve seat 3 to receive the two ends of the support rod 8 .

[0057] Thus, along the direction of the axis X, the support rod 8 is received by both the main housing 1 and the diaphragm body mounting seat 2. That is, the support rod 8 is engaged with both the main housing 1 and the diaphragm body mounting seat 2, a portion of the height of the support rod 8 along the axis X direction overlaps with a portion of the height of the main housing 1 along the axis X, and another portion of the height of the support rod 8 along the axis X direction overlaps with a portion of the height of the diaphragm body mounting seat 2 along the axis X.

[0058] The above describes an example in which the support rod is in a straight line shape. It should be understood that the support rod may also have other forms, for example, an X-shaped or cross-shaped support.

[0059] This arrangement of the support rod 8 can significantly increase the pressure range of the fluid pump, and can also avoid relative displacement of the two housing segments fixed to it, especially relative displacement perpendicular to the axis X. In the case of a high-pressure pump, the parts of the fluid pump are prone to deformation due to the high pressure, and the parts that cooperate with each other are prone to misalignment, causing the pump to malfunction or even be damaged. The support rod in the micro fluid pump according to the present invention effectively avoids this situation between the two housing segments.

[0060] In one embodiment, the main housing receiving parts 11 and 12 receive half of the height of the support rod 8 along the axis X, and the diaphragm seat receiving parts 23 and 24 receive the other half of the height of the support rod 8 along the axis X. Thus, when a lateral force tending to cause relative displacement between the first housing segment and the second housing segment occurs, the first housing segment and the second housing segment will be subjected to substantially equal lateral forces, that is, the lateral force is substantially evenly distributed to the two housing segments, thereby avoiding premature damage to one of the housing segments due to uneven force distribution.

[0061] Further, in order to make the support rod 8 more stably positioned relative to the main housing 1, the support rod 8 may include a positioning feature along the axis X, and the main housing receiving portion 11 has a corresponding main housing positioning feature along the axis X. In an example not shown, the positioning feature of the support rod 8 is a positioning recess facing the main housing 1, and the main housing positioning feature is a main housing positioning protrusion, and the positioning recess engages with the main housing positioning protrusion to connect and fix the support rod 8 to the main housing 1.

[0062] like Figures 3 to 6As shown, the support rod 8 may have positioning recesses in the form of through holes 811 and 812 at portions near both ends, the main shell 1 may have main shell positioning protrusions 111 and 112 in its main shell receiving portions 11 and 12, and the diaphragm body mounting seat 2 is provided with diaphragm seat positioning protrusions 231 and 241 at corresponding positions, and the main shell positioning protrusions 111 and 112 and the diaphragm seat positioning protrusions 231 and 241 of the main shell 1 respectively protrude from both sides of the support rod 8 into the through holes 811 and 812, so that the support rod 8 is connected and fixed to both the main shell 1 and the diaphragm body mounting seat 2.

[0063] Reference below Figure 5-8 The fluid pump according to the present invention is further described below. Figure 5 and 6 As shown, the support rod 8 may be provided with a support protrusion 81 protruding toward the diaphragm body mounting seat 2, and the bent rod 7 is supported on the support protrusion 81. In this embodiment, the bent rod 7 includes a hollow portion 72, so that the support rod 8 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 rod 8 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 with the axis X. Preferably, in this embodiment, the extension line Y ( Figure 6 ) is perpendicular to the axis X.

[0064] Return now Figure 5 and Figure 6 The support protrusion 81 is provided on the support rod 8 and protrudes from the support rod 8 toward the diaphragm body mounting seat 2, so that the curved rod 7 is supported on the support protrusion 81. Specifically, the support protrusion 81 can be spherical, such as Figure 6 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 81 .

[0065] 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.

[0066] like Figure 7 As shown, the support protrusion 81 and the support rod 8 can be separate parts, that is, they can be separated. They can be assembled together by tightly fitting the support protrusion 81 to the support rod 8. For example, the support rod 8 can be provided with a support recess 813, for example, provided on the upper surface 811 of the support rod 8, and the support protrusion 81 in the form of a support sphere is provided in the support recess 813, such as Figure 6The outer surface of the supporting sphere can cooperate with the inner edge of the supporting recess 813, so that the supporting sphere is tightly fitted to the supporting rod 8. When the curved rod 7 moves driven by the swing shaft 6, the supporting protrusion 81 supporting the curved rod 7 does not move with the curved rod 7 due to the tight fit with the supporting rod 8, but is fixed relative to the supporting rod 8.

[0067] In an embodiment not shown, the support protrusion 81 may be integrally formed with the support rod 8 to form a single piece.

[0068] The material forming the protrusion can have a variety of options. For example, the 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.

[0069] Reference below Figure 6-8 The bent rod 7 of the microfluid pump 100 according to the present invention is described below. Figure 6 and 8 As shown, in order to enable the bent rod 7 to be stably supported on the support protrusion 81, the bent rod 7 is provided with a bent rod recess 73 that cooperates with the support protrusion 81 on the side thereof facing the support protrusion 81. Thus, the support protrusion 81 is located between the support rod 8 and the bent rod recess 73. For example, in the case where the support protrusion 81 is separated from the support rod 8, the support protrusion 81 can be clamped between the support recess 813 of the support rod 8 and the bent rod recess 73. The bent rod recess 73 is configured to cooperate with the support protrusion 81 in a manner that enables unimpeded movement on the support protrusion 81. For example, when the support protrusion 81 is spherical, the curvature radius of the bent rod recess 73 is greater than the curvature radius of the support protrusion 81, so that the bent rod 7 can be supported on the support rod 8 but can move unimpeded during the operation of the microfluid pump.

[0070] Furthermore, the curved rod 7 may further include an insert 74 ( Figure 7 ), in which case the bent lever recess 73 may be provided on the insert 74. Figure 7 and 8 In 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 as to provide sufficient space for setting the curved rod recess 73 that cooperates with the support protrusion 81, and to ensure that the insert has sufficient structural strength. The curved rod recess 73 may be provided on the lower surface of the expanded 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 of the curved rod 7. The insert 74 may be made of a metal material, such as steel, thereby forming a rigid support between the protrusion 81 and the insert.

[0071] 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 also improving the overall structural strength of the bent lever 7.

[0072] In addition, for assembly, the main housing 1 is provided with axial assembly holes 13A, 13B, 13C and 13D, such as Figure 3 and 4 As shown in FIG. 4 , the pump assembly bolts 43 are disposed in the respective axial assembly holes 13A, 13B, 13C and 13D. Specifically, Figure 4 In the illustrated embodiment, axial assembly holes 13A, 13B, 13C and 13D may be provided at approximately the middle of each edge of the main housing 1, through which the pump assembly bolts 43 extend. Figure 4 At two opposite edges of the main housing 1 for receiving the support rod 8, the main housing receiving portion 11 can be arranged adjacent to the axis assembly hole 13A, and the main housing receiving portion 12 can be arranged adjacent to the axis assembly hole 13C. Such an arrangement enables the support rod and the pump assembly bolts that play a fixing and reinforcing role to be arranged in substantially the same plane, which is defined by the axis X and the extension line Y of the support rod 8, thereby strengthening the overall strength of the pump and further ensuring that relative displacement between adjacent housing segments is avoided.

[0073] In a preferred embodiment, reference Figure 3 and Figure 7 , the end of the support rod 8 can be arranged to partially surround the axial assembly holes 13A and 13C. For example, the end of the support rod 8 can be provided with grooves 801 and 802, which are, for example, semicircular grooves. The grooves 801 and 802 are recessed from the distal edge of the support rod 8 toward the middle of the support rod 8. The grooves 801 and 802 can partially surround the axial assembly holes 13A and 13C, so that after assembly, the grooves 801 and 802 at the end of the support rod 8 also partially surround the pump assembly bolts 43. As a result, the support rod 8 and the pump assembly bolts 43 at least partially overlap in a direction perpendicular to the plane defined by the axis X and the extension line Y, forming a multiple reinforcement structure, which better stabilizes the mutual connection between adjacent housing segments and thus better avoids relative displacement between them.

[0074] 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 first housing segment connected to the motor and defining an accommodation space; A second housing segment abuts against and is connected to the first housing segment; a rotating wheel that receives the torque transmitted by the motor to rotate and has an eccentric swing shaft disposed thereon; 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 cavity of the diaphragm body to reciprocate compression and suction motion; Wherein, the fluid pump further comprises a support rod, the bent rod comprises a hollow portion, the support rod passes through the hollow portion in a plane transverse to the axis and supports the bent rod along the direction of the axis; And wherein the support rod is fixedly connected to the first shell segment and the second shell segment at the interface between the two.

2. The microfluid pump according to claim 1, wherein: The first shell section is a main shell, the second shell section is a diaphragm body mounting seat, and a diaphragm body having a plurality of diaphragm cavities is arranged on the diaphragm body mounting seat.

3. The microfluid pump according to claim 2, wherein: The main housing is provided with a main housing receiving portion to receive a portion of the support rod along the axis, and the diaphragm body mounting seat is provided with a diaphragm seat receiving portion corresponding to the main housing receiving portion along the axis direction to receive another portion of the support rod along the axis.

4. The microfluid pump according to claim 3, wherein: The main housing receiving portion receives half of the height of the support rod along the axis, and the diaphragm seat receiving portion receives the other half of the height of the support rod along the axis.

5. The microfluid pump according to claim 3 or 4, wherein: The support rod includes a locating feature along the axis, and the main housing receiving portion has a corresponding main housing locating feature along the axis.

6. The microfluid pump according to claim 5, wherein: The positioning feature portion is a positioning recessed portion facing the main housing, and the main housing positioning feature portion is a main housing positioning protrusion.

7. The microfluid pump according to claim 6, wherein: The positioning recess is a through hole, and the diaphragm body mounting seat includes a corresponding diaphragm seat positioning protrusion.

8. The microfluid pump according to claim 3 or 4, wherein: The main housing is provided with an axial assembly hole in which a pump assembly bolt is disposed, and wherein the main housing receiving portion is disposed adjacent to the axial assembly hole.

9. The microfluid pump according to claim 8, wherein: The end of the support rod partially surrounds the axial assembly hole.

10. The microfluid pump according to any one of claims 1 to 4, wherein: The support rod has a straight shape or an X shape.

11. The microfluid pump according to any one of claims 1 to 4, wherein: The support rod comprises a support protrusion, and the bent rod is supported on the support protrusion.

12. The microfluid pump according to claim 11, wherein: The support rod is provided with a support recess, and the support protrusion is a support sphere arranged on the support recess.

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 pressure fluid application device is a coffee machine.

15. The apparatus of claim 13, wherein: The pressure fluid application device is a household dental cleaning device.

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