Roundel structure for five-compressing-chamber diaphragm pump

Abstract

A roundel structure for a five-compressing-chamber diaphragm pump includes a cylindrical or inverted frustoconical eccentric roundel in an eccentric roundel mount. The cylindrical or inverted frustoconical eccentric roundel includes an annular positioning groove or indentation, a vertical or inverted frustoconical flank and a sloped top ring extending from the annular positioning groove or indentation to the flank. The sloped top ring eliminates the oblique high frequency pull and squeezing phenomena that occurs in a conventional tubular eccentric roundel arrangement.

Claims

1. A roundel structure for a five-compressing-chamber diaphragm pump comprises a motor with an output shaft, a motor upper chassis, a wobble plate with an integral protruding cam-lobed shaft, an eccentric roundel mount, a pump head body, a diaphragm membrane, five pumping pistons, a piston valvular assembly and a pump head cover, wherein: the motor upper chassis includes-an upper annular rib ring with several fastening bores disposed around a circumference of the motor upper chassis; the wobble plate with the integral protruding cam-lobed shaft includes a shaft coupling hole through which the motor output shaft of the motor extends; the eccentric roundel mount includes a central bearing at the bottom thereof for receiving the protruding cam-lobed shaft of the wobble plate, five inverted frustoconical eccentric roundels disposed around a circumference of the eccentric roundel mount, each frustoconical eccentric roundel having a horizontal top face, an inverted frustoconical flank, a female-threaded bore and an annular positioning groove formed on the horizontal top face; the pump head body, which covers the upper annular rib ring of the motor upper chassis to encompass the wobble plate with the integral protruding cam-lobed shaft and the eccentric roundel mount therein, includes five operating holes disposed therein, each operating hole having an inner diameter that is bigger than an outer diameter of a respective frustoconical eccentric roundel for receiving each corresponding frustoconical eccentric roundel respectively, a lower annular flange formed under the eccentric roundel mount for mating with the upper annular rib ring of the motor upper chassis, and a plurality of fastening bores disposed around a circumference of the pump head body at locations corresponding to locations of the several fastening bores of the upper annular rib ring; the diaphragm membrane is a semi-rigid elastic membrane placed on the pump head body, and includes an outer raised brim and an inner raised brim, each extending around a periphery of the diaphragm membrane, as well as five evenly spaced radial raised partition ribs having ends connected with the inner raised brim, five equivalent piston acting zones being formed and partitioned by the radial raised partition ribs, wherein each piston acting zone has an acting zone hole created therein in correspondence with each female-threaded bore in the frustoconical eccentric roundel of the eccentric roundel mount respectively, and an annular positioning protrusion for each acting zone hole is formed at a bottom side of the diaphragm membrane; the pumping pistons are respectively disposed in the piston acting zones of the diaphragm membrane, and each pumping piston has a tiered hole, each annular positioning protrusion in the diaphragm membrane is inserted into a respective said annular positioning groove in the cylindrical eccentric roundel of the eccentric roundel mount, which is fastened to the diaphragm membrane by a fastening screw that extends through the tiered hole of each pumping piston and the acting zone hole of each corresponding piston acting zone in the diaphragm membrane, and that is screwed into each female-threaded bore of corresponding five cylindrical eccentric roundels in the eccentric roundel mount; the piston valvular assembly covers the diaphragm membrane and includes a downwardly extending brim inserted between the outer raised brim and inner raised brim of the diaphragm membrane, a central dish-shaped round outlet mount having a central positioning bore with five equivalent sectors, each of which contains multiple circumferentially located outlet ports, a T-shaped plastic anti-backflow valve with a central positioning shank, and five adjacent inlet mounts, each of which includes multiple circumferentially located inlet ports and an inverted central piston disk, respectively, so that each piston disk serves as a valve for each corresponding group of multiple inlet ports, wherein the central positioning shank of the plastic anti-backflow valve mates with the central positioning bore of the central outlet mount such that multiple outlet ports in the central round outlet mount are communicable with the five adjacent inlet mounts, and a sealed preliminary-compressing chamber is formed between each inlet mount and corresponding piston acting zone in the diaphragm membrane upon insertion of the downwardly extending brim between the outer raised brim and inner raised brim of the diaphragm membrane such that one end of each preliminary-compressing chamber is communicable with each of the corresponding inlet ports; the pump head cover, which covers the pump head body to encompass the piston valvular assembly, pumping piston and diaphragm membrane therein, includes a water inlet orifice, a water outlet orifice, and several fastening bores, and a tiered rim and an annular rib ring are disposed in a bottom inside of said pump head cover, wherein the outer brim the of diaphragm membrane is attached to the tiered rim to form a seal therewith, and wherein a high-compressing chamber is configured between a cavity formed by the inside wall of the annular rib ring and the central outlet mount of the piston valvular assembly, the bottom of the annular rib ring closely covering a brim of the central outlet mount; a sloped top ring extends from the annular positioning groove to the inverted frustoconical flank in each frustoconical eccentric roundel of the eccentric roundel mount, wherein said inverted frustoconical eccentric roundel comprises a roundel mount and an inverted frustoconical roundel yoke in detachable separation such that the outer diameter of the frustoconical roundel yoke is enlarged but still smaller than the inner diameter of the operating hole in the pump head body, wherein said roundel mount is a two-layered frustum that includes a bottom-layer base with a positional crescent facing inwardly and a top-layer protruded cylinder with a central female-threaded bore; and said inverted frustoconical roundel yoke is sleeved over the roundel mount and includes an upper bore, a middle bore and a lower bore stacked as a three-layered integral hollow frustum, wherein the sloped top ring extends from the upper bore to the flank such that a bore diameter of the upper bore is bigger than an outer diameter of the protruded cylinder, a bore diameter of the middle bore is equal to the outer diameter of the protruded cylinder, a bore diameter of the lower bore is equal to an outer diameter of the bottom-layer base in the roundel mount, and the annular positioning groove is formed between the protruded cylinder and the inside wall of the upper bore as a result of the frustoconical roundel yoke being sleeved over the roundel mount.

2. A roundel structure for a five-compression-chamber diaphragm pump, said roundel structure including a roundel mount situated on a lower side of a pump head body and five inverted frustoconical eccentric roundels mounted on the roundel mount to extend through five operating holes in the pump head body, said five-compression-chamber diaphragm pump having a motor with a motor housing to which the pump head body is fixed, a diaphragm membrane fixed to the five inverted frustoconical eccentric roundels through the five operating holes and situated on an upper side of the pump head body, and five pumping pistons arranged to be moved in a pumping action upon movement of the diaphragm membrane, the roundel mount engaging a wobble plate such that rotation of the wobble plate by the motor causes the roundel mount to wobble, resulting in sequential up and down movement of the five inverted frustoconical eccentric roundels, the sequential up and down movement of the eccentric roundels causing sequential, reciprocating movement of five piston acting zones in the diaphragm membrane and of the five pumping pistons, and the diaphragm membrane further including five annular downwardly-projecting positioning protrusions each arranged to be inserted into a respective annular positioning groove in a top surface of each of said inverted frustoconical eccentric roundels, wherein a section of the top surface of each eccentric roundel forms a sloped top ring that extends from a respective said annular positioning groove to an inverted frustoconical flank of the respective eccentric roundel, and each of the inverted frustoconical eccentric roundels comprises a roundel mount and an inverted frustoconical roundel yoke in detachable separation such that the outer diameter of the frustoconical roundel yoke is enlarged but still smaller than the inner diameter of the operating hole in the pump head body, and wherein: the roundel mount is a two-layered frustum that includes a bottom-layer base with a positional crescent facing inwardly and a top-layer protruded cylinder with a central female-threaded bore; and said inverted frustoconical roundel yoke is sleeved over the roundel mount and includes an upper bore, a middle bore and a lower bore stacked as a three-layered integral hollow frustum, and the sloped top ring extends from the upper bore to the inverted frustoconical flank such that a bore diameter of the upper bore is bigger than an outer diameter of the protruded cylinder, a bore diameter of the middle bore is equal to the outer diameter of the protruded cylinder, a bore diameter of the lower bore is equal to an outer diameter of the bottom-layer base in the roundel mount, and the annular positioning groove is formed between the protruded cylinder and the inside wall of the upper bore as a result of the frustoconical roundel yoke being sleeved over the roundel mount.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective assembled view for conventional five-compressing-chamber diaphragm pump.

(2) FIG. 2 is a perspective exploded view for conventional five-compressing-chamber diaphragm pump.

(3) FIG. 3 is a perspective view for eccentric roundel mount of conventional five-compressing-chamber diaphragm pump.

(4) FIG. 4 is a cross sectional view taken against the section line of 4-4 from previous FIG. 3.

(5) FIG. 5 is a perspective view for pump head body of conventional five-compressing-chamber diaphragm pump.

(6) FIG. 6 is a cross sectional view taken against the section line of 6-6 from previous FIG. 5.

(7) FIG. 7 is a perspective view for diaphragm membrane of conventional five-compressing-chamber diaphragm pump.

(8) FIG. 8 is a cross sectional view taken against the section line of 8-8 from previous FIG. 7.

(9) FIG. 9 is a bottom view for diaphragm membrane of conventional five-compressing-chamber diaphragm pump.

(10) FIG. 10 is a cross sectional view taken against the section line of 10-10 from previous FIG. 1.

(11) FIG. 11 is the first operation illustrative view for conventional five-compressing-chamber diaphragm pump.

(12) FIG. 12 is the second operation illustrative view for conventional five-compressing-chamber diaphragm pump.

(13) FIG. 13 is the third operation illustrative view for conventional five-compressing-chamber diaphragm pump.

(14) FIG. 14 is a partially enlarged view taken from circled-portion-a of previous FIG. 13.

(15) FIG. 15 is a perspective exploded view for the first exemplary embodiment of the present invention.

(16) FIG. 16 is a perspective view for eccentric roundel mount in the first exemplary embodiment of the present invention.

(17) FIG. 17 is a cross sectional view taken against the section line of 17-17 from previous FIG. 16.

(18) FIG. 18 is an assembled cross sectional view for the first exemplary embodiment of the present invention.

(19) FIG. 19 is an operation illustrative view for the first exemplary embodiment of the present invention.

(20) FIG. 20 is a partially enlarged view taken from circled-portion-a of previous FIG. 19.

(21) FIG. 21 is an illustrative view showing the contrastive comparison of the cylindrical eccentric roundel acting the diaphragm membrane for the conventional five-compressing-chamber diaphragm pump and the present invention in the first exemplary embodiment of the present invention.

(22) FIG. 22 is a perspective view for eccentric roundel mount in the second exemplary embodiment of the present invention.

(23) FIG. 23 is a cross sectional view taken against the section line of 23-23 from previous FIG. 22.

(24) FIG. 24 is an assembled cross sectional view for the second exemplary embodiment of the present invention.

(25) FIG. 25 is an operation illustrative view for the second exemplary embodiment of the present invention.

(26) FIG. 26 is a partially enlarged view taken from circled-portion-a of previous FIG. 25.

(27) FIG. 27 is an illustrative view showing the contrastive comparison of the cylindrical eccentric roundel acting the diaphragm membrane for the conventional five-compressing-chamber diaphragm pump and the present invention in the second exemplary embodiment of the present invention.

(28) FIG. 28 is a perspective exploded view for the third exemplary embodiment of the present invention.

(29) FIG. 29 is a cross sectional view taken against the section line of 29-29 from previous FIG. 28.

(30) FIG. 30 is a perspective assembled view for the third exemplary embodiment of the present invention.

(31) FIG. 31 is a cross sectional view taken against the section line of 31-31 from previous FIG. 30.

(32) FIG. 32 is an assembled cross sectional view for the third exemplary embodiment of the present invention.

(33) FIG. 33 is an operation illustrative view for the third exemplary embodiment of the present invention.

(34) FIG. 34 is a partially enlarged view taken from circled-portion-a of previous FIG. 33.

(35) FIG. 35 is an illustrative view showing the contrastive comparison of the cylindrical eccentric roundel acting the diaphragm membrane for the conventional five-compressing-chamber diaphragm pump and the present invention in the third exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(36) Please refer to FIGS. 15 through 18, which are illustrative figures of roundel structure for five-compressing-chamber diaphragm pump in the first exemplary embodiment of the present invention.

(37) The roundel structure is a cylindrical eccentric roundel 52 in an eccentric roundel mount 50.

(38) The cylindrical eccentric roundel 52 basically comprises a sloped top ring 58 created from the annular positioning dent 55 to the vertical flank 56 to replace the conventional rounded shoulder 57 in each tubular eccentric roundel 52 of the eccentric roundel mount 50.

(39) Please refer to FIGS. 19 through 21, which are illustrative figures for the operation of the roundel structure for five-compressing-chamber diaphragm pump in the first exemplary embodiment of the present invention.

(40) Firstly, when the motor 10 is powered on, the wobble plate 40 is driven to rotate by the motor output shaft 11 so that five cylindrical eccentric roundels 52 on the eccentric roundel mount 50 orderly move in up-and-down reciprocal stroke constantly;

(41) Secondly, five piston acting zones 74 in the diaphragm membrane 70 are orderly driven by the up-and-down reciprocal stroke of five cylindrical eccentric roundels 52 to move in up-and-down displacement;

(42) Thirdly, when the tubular eccentric roundel or cylindrical eccentric roundel 52 moves in up stroke with piston acting zone 74 in up displacement, an acting force F will obliquely pull the partial portion between corresponding annular positioning protrusion 76 and outer raised brim 71 of the diaphragm membrane 70;

(43) Please refer to FIGS. 14 and 20. By comparing to the operations between the conventional tubular eccentric roundels 52 and the cylindrical eccentric roundels 52 of the present invention, at least two differences are obtained as below.

(44) In the case of conventional tubular eccentric roundel 52, among all distributed components of the rebounding force Fs, the component force happened at the contacting bottom position P of the diaphragm membrane 70 with the rounded shoulder 57 of the horizontal top face 53 in the tubular eccentric roundel 52 is maximum so that the squeezing phenomenon happened here is also maximum (as shown in FIG. 14). With such nonlinear distribution of the squeezing phenomena, the obliquely pulling action becomes severe. Whereas, in the case of cylindrical eccentric roundels 52, all distributed components of the rebounding force Fs seem rather linear because the sloped top ring 58 therein flatly attaches the bottom area of the piston acting zone 74 for the diaphragm membrane 70 so that the obliquely pulling action almost eliminated due to no squeezing phenomenon (as shown in FIGS. 19 and 20).

(45) Moreover, under the same acting force F, the rebounding force Fs is inversely proportional to the contact area so that all distributed components of the rebounding force Fs for the cylindrical eccentric roundels 52 of the present invention (as shown in FIG. 20) are substantially less than all distributed components of the rebounding force Fs for the conventional tubular eccentric roundel 52 (as shown in FIG. 14).

(46) From above comparison, two advantages are inherited by means of the sloped top ring 58 created from the annular positioning dent 55 to the vertical flank 56 in the eccentric roundel mount 50. First, the susceptible breakage of the diaphragm membrane 70 caused by the squeezing phenomena of high frequency, which is incurred by the rounded shoulder 57 of the horizontal top face 53 in the tubular eccentric roundel 52, is completely eliminated. Second, the rebounding force Fs of the diaphragm membrane 70 caused by the acting force F, which is incurred by the orderly up-and-down displacement of five piston acting zones 74 in the diaphragm membrane 70 driven by the up-and-down reciprocal stroke of five tubular eccentric roundels or cylindrical eccentric roundels 52, is tremendously reduced.

(47) Therefore, from above inherited advantages, some benefits are obtained as below.

(48) 1. The durability of the diaphragm membrane 70 for sustaining the pumping action of high frequency from the cylindrical eccentric roundels 52 is mainly enhanced.

(49) 2. The power consumption of the five-compressing-chamber diaphragm pump is tremendously diminished due to less current being wasted in the squeezing phenomena of high frequency.

(50) 3. The working temperature of the five-compressing-chamber diaphragm pump is tremendously subdued due to less power consumption being used.

(51) 4. The annoying noise of the bearing incurred by the aged lubricant in the five-compressing-chamber diaphragm pump, which is expeditiously accelerated by the high working temperature, is mostly eliminated.

(52) Through practical pilot test for the sample of the present invention, the testing results are shown as below.

(53) A. The service lifespan of the diaphragm membrane 70 is exceedingly extended over doubleness.

(54) B. The diminished electric current is over 1 ampere.

(55) C. The subdued working temperature is over 15 degree of Celsius.

(56) D. The smoothness of the bearing is better improved.

(57) Please refer to FIGS. 22 through 24, which are illustrative figures of roundel structure for five-compressing-chamber diaphragm pump in the second exemplary embodiment of the present invention.

(58) The roundel structure is an inverted conical frustum eccentric roundel 502 in an eccentric roundel mount 500.

(59) The conical frustum eccentric roundel 502 basically comprises an integral inverted conical frustum flank 506 and a sloped top ring 508 such that the outer diameter of the conical frustum eccentric roundel 502 is enlarged but still smaller than the inner diameter of the operating hole 61 in the pump head body 60, as well as the sloped top ring 508 is created from an annular positioning dent 505 to the inverted conical frustum flank 506.

(60) Please refer to FIGS. 25 through 27, which are illustrative figures for the operation of the roundel structure for five-compressing-chamber diaphragm pump in the second exemplary embodiment of the present invention.

(61) Firstly, when the motor 10 is powered on, the wobble plate 40 is driven to rotate by the motor output shaft 11 so that five conical frustum eccentric roundel 502 on the eccentric roundel mount 500 orderly move in up-and-down reciprocal stroke constantly;

(62) Secondly, five piston acting zones 74 in the diaphragm membrane 70 are orderly driven by the up-and-down reciprocal stroke of five conical frustum eccentric roundel 502 to move in up-and-down displacement;

(63) Thirdly, when the conical frustum eccentric roundel 502 in the present invention moves in up stroke with piston acting zone 74 in up displacement, an acting force F will obliquely pull the partial portion between corresponding annular positioning protrusion 76 and outer raised brim 71 of the diaphragm membrane 70; and

(64) Finally, by means of the sloped top ring 508 in the eccentric roundel mount 500, not only the susceptible breakage of the diaphragm membrane 70 caused by the squeezing phenomena of high frequency is completely eliminated but also the rebounding force Fs of the diaphragm membrane 70 caused by the acting force F is tremendously reduced. Meanwhile, by means of the inverted conical frustum flank 506, the colliding possibility the conical frustum eccentric roundel 502 with the operating hole 61 in the pump head body 60 is eliminated even the outer diameter of the conical frustum eccentric roundel 502 is enlarged.

(65) Moreover, under the same acting force F, the rebounding force Fs is inversely proportional to the contact area. By means of the enlarged outer diameter of the inverted conical frustum eccentric roundel 502, the contact area of the sloped top ring 508 with the bottom side of the diaphragm membrane 70 is increased (as ring A shown in FIG. 27) so that all distributed components of the rebounding force Fs for the inverted conical frustum eccentric roundels 502 of the present invention are further reduced.

(66) Therefore, by means of the inverted conical frustum eccentric roundel 502 in the present invention, some benefits are obtained as below.

(67) 1. The durability of the diaphragm membrane 70 for sustaining the pumping action of high frequency from the inverted conical frustum eccentric roundel 502 is mainly enhanced.

(68) 2. The power consumption of the five-compressing-chamber diaphragm pump is tremendously diminished due to less current being wasted in the squeezing phenomena of high frequency.

(69) 3. The working temperature of the five-compressing-chamber diaphragm pump is tremendously subdued due to less power consumption being used.

(70) 4. The annoying noise of the bearing incurred by the aged lubricant in the compressing diaphragm pump, which is expeditiously accelerated by the high working temperature, is mostly eliminated.

(71) 5. The service lifespan of the five-compressing-chamber diaphragm pump is further prolonged because all distributed components of the rebounding force Fs for the inverted conical frustum eccentric roundels 502 of the present invention are further reduced.

(72) Please refer to FIGS. 28 through 31, which are illustrative figures of roundel structure for five-compressing-chamber diaphragm pump in the third exemplary embodiment of the present invention. The eccentric roundel structure is a combinational eccentric roundel 502 in an eccentric roundel mount 500. The combinational eccentric roundel 502 basically comprises a roundel mount 511 and an inverted conical frustum roundel yoke 521 in detachable separation such that the outer diameter of the conical frustum roundel yoke 521 is enlarged but still smaller than the inner diameter of the operating hole 61 in the pump head body 60, wherein said roundel mount 511, which is a two-layered frustum, includes bottom-layer base with a positional crescent 512 facing inwardly and a top-layer protruded cylinder 513 with a central female-threaded bore 514; and said inverted conical frustum roundel yoke 521, which is to sleeve over the corresponding roundel mount 511, includes an upper bore 523, a middle bore 524 and a lower bore 525 stacked as a three-layered integral hollow frustum, as well as an inverted conical frustum flank 522 and a sloped top ring 526 created from the upper bore 523 to the inverted conical frustum flank 522 such that the bore diameter of the upper bore 523 is bigger than the outer diameter of the protruded cylinder 513, the bore diameter of the middle bore 524 is equivalent to the outer diameter of the protruded cylinder 513 while the bore diameter of the lower bore 525 is equivalent to the outer diameter of the bottom-layer base in the roundel mount 511, and a positioning dented ring 515 created between the protruded cylinder 513 and the inside wall of the upper bore 523 upon having the conical frustum roundel yoke 521 sleeved over the roundel mounts 511 (as shown in FIGS. 30 and 31).

(73) Please refer to FIGS. 32 and 35, which are illustrative figures for the assembly of the roundel structure for five-compressing-chamber diaphragm pump in the third exemplary embodiment of the present invention.

(74) Firstly, sleeve the conical frustum roundel yoke 521 over the roundel mounts 511;

(75) Secondly, insert all five annular positioning protrusions 76 of the diaphragm membrane 70 into five corresponding positioning dented rings 515 in five combinational eccentric roundels 502 of the eccentric roundel mount 500; and

(76) Finally, by running each fastening screw 1 through the each corresponding tiered hole 81 of pumping piston 80 and each corresponding acting zone hole 75 in each piston acting zone 74 of the diaphragm membrane 70, then securely screw the fastening screw 1 to firmly assembly the diaphragm membrane 70 and five pumping pistons 80 on five corresponding female-threaded bores 514 in five roundel mounts 511 of the eccentric roundel mount 500 (as enlarged view shown in FIG. 32 of association).

(77) Please refer to FIGS. 33 and 34, which are illustrative figures for the operation of the roundel structure for five-compressing-chamber diaphragm pump in the third exemplary embodiment of the present invention.

(78) Firstly, when the motor 10 is powered on, the wobble plate 40 is driven to rotate by the motor output shaft 11 so that five combinational eccentric roundels 502 on the eccentric roundel mount 50 orderly move in up-and-down reciprocal stroke constantly;

(79) Secondly, five piston acting zones 74 in the diaphragm membrane 70 are orderly driven by the up-and-down reciprocal stroke of five combinational eccentric roundels 502 to move in up-and-down displacement;

(80) Thirdly, when the combinational eccentric roundel 502 in the present invention moves in up stroke with piston acting zone 74 in up displacement, an acting force F will obliquely pull the partial portion between corresponding annular positioning protrusion 76 and outer raised brim 71 of the diaphragm membrane 70; and

(81) Finally, by means of the sloped top ring 526 in the inverted conical frustum roundel yoke 521 of the eccentric roundel mount 500, not only the susceptible breakage of the diaphragm membrane 70 caused by the squeezing phenomena of high frequency is completely eliminated (as shown in FIGS. 33 and 34) but also the rebounding force Fs of the diaphragm membrane 70 caused by the acting force F is tremendously reduced (as enlarged view shown in FIG. 34 of association).

(82) Moreover, under the same acting force F, the rebounding force Fs is inversely proportional to the contact area. By means of the enlarged outer diameter of the inverted conical frustum roundel yoke 521, the contact area of the sloped top ring 508 with the bottom side of the diaphragm membrane 70 is increased (as ring A shown in FIG. 35) so that all distributed components of the rebounding force Fs for the inverted conical frustum roundel yoke 521 of the present invention are further reduced.

(83) Besides, the fabrication of the roundel structure for five-compressing-chamber diaphragm pump for the third exemplary embodiment in the present invention is stepwise shown as below.

(84) Firstly, the roundel mount 511 and eccentric roundel mount 500 are fabricated together as an integral body;

(85) Secondly, the conical frustum roundel yoke 521 is independently fabricated as a separated entity; and

(86) Finally, the conical frustum roundel yoke 521 and the integral body of roundel mount 511 with eccentric roundel mount 500 are assembled to become a united entity combinational eccentric roundel 502.

(87) Thereby, the contrivance of the combinational eccentric roundel 502 not only meets the requirement of mass production but also reduces the overall manufacturing cost.

(88) Therefore, by means of the combinational eccentric roundel 502 with conical frustum roundel yoke 521 in the present invention, some benefits are obtained as below.

(89) 1. The durability of the diaphragm membrane 70 for sustaining the pumping action of high frequency from the inverted conical frustum roundel yoke 521 is mainly enhanced.

(90) 2. The power consumption of the five-compressing-chamber diaphragm pump is tremendously diminished due to less current being wasted in the squeezing phenomena of high frequency.

(91) 3. The working temperature of the five-compressing-chamber diaphragm pump is tremendously subdued due to less power consumption being used.

(92) 4. The annoying noise of the bearing incurred by the aged lubricant in the compressing diaphragm pump, which is expeditiously accelerated by the high working temperature, is mostly eliminated.

(93) 5. The service lifespan of the five-compressing-chamber diaphragm pump is further prolonged because all distributed components of the rebounding force Fs for the inverted conical frustum roundel yoke 521 of the present invention are further reduced.

(94) 6. The manufacturing cost of the five-compressing-chamber diaphragm pump is reduced because the present invention is suitable for mass production.

(95) In conclusion the disclosure heretofore, by means of simple new contrivance of the cylindrical eccentric roundel 52, inverted conical frustum eccentric roundel 502 and combinational eccentric roundel 502 of the present invention, the service lifespan of the diaphragm membrane 70 in the five-compressing-chamber diaphragm pump can be lengthened so that the service lifespan of the five-compressing-chamber diaphragm pump can be doubly extended. Accordingly, the present invention meets the essential criterion of the patent. Therefore, we submit the application for patent in accordance with related patent laws.