JP2004263657A - Low noise electromagnetic air pump and its mounting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To largely reduce noise during a pumping action that becomes significant in a conventional air pump, to reduce vibration, to miniaturize and compact an air pump, and to improve handling property, mountability, and maintainability. <P>SOLUTION: Air introduced from air inflow pipe 9a is guided into an air passage 8 equipped with an orifice 21, an orifice 23, a filter 24, a swelling chamber 14 and the like to reduce its noise. Air in a first air passage 8a of the air passage 8 is dispersed from a second air passage 8b, comes into pump heads 4 mounted to cases 2 on both sides, joins from the cases 2 on both sides to a third air passage 8c side via umbrella valves 45 and 46 and is introduced, and is delivered from a fourth air passage 8d having a structure substantially the same as that of the first air passage 8a. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air pump that is used as a linear pump and performs suction and discharge of air using an electromagnetic force and a diaphragm, and in particular, a low-noise electromagnetic air pump that is formed in a small size with low noise and vibration, and a method of assembling the same. About.
[0002]
[Prior art]
As a conventional electromagnetic air pump, like an air pump according to the present invention described in detail below, a permanent magnet is sandwiched between opposed electromagnetic coils, and a diaphragm is fixed at both ends of a shaft fixed to the permanent magnet and moved backward. At least, there is a pump chamber that covers the diaphragm and is fixed to the main body case that houses the electromagnetic coil and the like, and an air suction unit and an air discharge unit that communicate with the pump chamber (see Patent Document 1). . In addition, there is a linear air pump in which an air chamber provided with a diaphragm in the center is sandwiched between electromagnets, and a suction valve and a protruding valve are operated by using a volume change of the air chamber by the returning diaphragm to suction and discharge air (Patent Literature) 2).
[0003]
[Patent Document 1]
JP-A-7-310669 (pages 3 to 5, FIG. 1)
[Patent Document 2]
JP-A-7-279850 (page 2, FIG. 1)
[0004]
[Problems to be solved by the invention]
The electromagnetic air pump disclosed in Japanese Patent Application Laid-Open No. Hei 7-310669 is mainly aimed at miniaturization and reduction of the product cost, and is certainly formed in a compact form. It is not a thin one as in the present invention. Further, little consideration has been given to noise reduction in the air intake and exhaust passages when the diaphragm is moved backward, and it is difficult to reduce noise. Further, the diaphragm and the shaft are screwed at the center as shown in FIG. 14, and a force in the rotational direction is applied to the diaphragm and the component for fixing the diaphragm. There is a problem that cannot be set at the position. On the other hand, the linear air pump disclosed in Japanese Patent Application Laid-Open No. 7-279850 aims at energy saving, low noise, low vibration, and small size and light weight, but has a simple and inexpensive structure as a whole, and has low noise and low vibration. Regardless of the purpose, the disclosure of the specific structure for that purpose is inadequate, and there is a problem that the effects of those structures are not sufficiently satisfactory.
[0005]
The present invention has been made in view of the above circumstances, and is made of a structure capable of sufficiently exerting its function as an air pump. The noise and vibration are reliably reduced, and the compact and compact size is achieved. It is an object of the present invention to provide a low-noise electromagnetic air pump and an assembling method thereof that are also effective in terms of maintainability.
[0006]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention is an air pump formed to operate a diaphragm by electromagnetic force and reduce noise in order to achieve the above object. The air pump has one air inlet and one air inlet on the upper surface side. A block-shaped case that forms an air passage communicating with the discharge port and houses therein a thin electromagnetic coil and a slider that reciprocates by electromagnetic force and forms openings on both side end surfaces near both ends of the slider, A diaphragm fitted into the opening and moved by the slider, and a pair of bulk valves which are fixed to the both end surfaces of the case so as to cover the diaphragm and open / close in accordance with the movement of the diaphragm inside; A pump head that forms an air chamber that can communicate with the air passage side; air that flows in from one air inlet is distributed to the pump heads on both sides; The air discharged from the pump head merges and is discharged from one of the air discharge ports. The air inlet, the air discharge port, and the air passage are provided with orifices and filters for reducing flow rate and noise, and the diaphragm is provided with the orifice. It is characterized by having a shape interposed as a seal member between the case and the pump head. Since the electromagnetic coil is formed thin and housed in the case, the whole is formed in a small size, an expansion chamber and a reduction chamber are provided in the air passage, and an air chamber and a bulk valve are also provided in the pump head. Therefore, the noise generated in the air passage is greatly reduced. In addition, since the diaphragm also functions as a sealing member, the size and cost can be reduced.
[0007]
In addition, the low noise electromagnetic air pump has a configuration in which the air inlet and the air discharge port are disposed so as to protrude from both end surfaces of the air pump and have orifices mounted therein, so that the air inlet and the air discharge port protrude. By doing so, it is possible to avoid the interference noise (wind noise) of the gas due to the intake and exhaust of the case and the pump head, thereby reducing the noise, and providing the orifice to further reduce the noise. In particular, the air passage of the case is provided with a swelling chamber and a reduction chamber adjacent to the swelling chamber, and the swelling chamber is provided with a filter and / or an orifice. By installing a filter in the bulging chamber, noise can be further reduced.
[0008]
In the low-noise electromagnetic air pump according to a second aspect, the filter is made of a fine mesh, and the orifice is made of a metal tube forming the air passage hole covered with a polymer material. And This prevents the air passage hole from being crushed when the filter is installed in the expansion chamber.
[0009]
According to a third aspect of the present invention, there is provided the low-noise electromagnetic air pump, wherein the diaphragm includes a tongue portion formed integrally with a part of an outer periphery of the butterfly portion fitted into the opening of the case. The part is interposed between the case and the pump head to function as a seal part, and the tongue part is formed with a communication hole communicating with the air passage side of the case, and the butterfly part and the tank part , The cost of the diaphragm can be reduced. Further, with this structure, the diaphragm can also function as a seal member, and cost reduction can be achieved.
[0010]
The pump head may further include a pair of through holes communicating with an air passage of the case, a first air chamber communicating with the through holes, and a first air chamber side via the pair of bulk valves. It is characterized by having a second air chamber formed at a position facing the diaphragm and communicating with the diaphragm, wherein the pair of bulk valves are arranged in opening and closing directions opposite to each other. With the above-described structure of the pump head, a resistance path is formed in the air passage, so that noise can be further reduced. In addition, air suction and discharge can be performed more accurately and modestly by using a bulk valve. Moreover, the whole is compacted, and the airtightness and the maintainability can be improved.
[0011]
According to a fourth aspect of the present invention, there is provided a low-noise electromagnetic air pump, wherein a diaphragm insert is fixed to a center portion of the butterfly portion of the diaphragm, and the diaphragm insert is inserted into the slider and connected by screwing from a side surface. It is characterized by being performed. Since the diaphragm insert is inserted into the slider side and screwed from the side, the diaphragm can be correctly attached without giving a rotational shift to the diaphragm.
[0012]
Further, in the low-noise electromagnetic air pump according to claim 5, the electromagnetic coil is disposed to face each other across the slider, and the total thickness of the electromagnetic coil and the slider is equal to the diameter of the diaphragm. It is characterized by being of substantially equal dimensions. Since the thickness including the electromagnetic coil and the slider is made thin, the overall structure can be made compact.
The low noise electromagnetic air pump is characterized in that all the opening surfaces of the case and the pump head are closed by a seal member and a flat plate cover. Since the flat cover is attached to the case or the pump head via the seal member, air leakage is prevented, and the pump function of the air pump is reliably exhibited.
[0013]
Furthermore, a low noise electromagnetic air pump according to claim 6 and a method of assembling the same are the method of assembling the diaphragm and the slider of the low noise electromagnetic air pump according to any one of claims 1 to 8, wherein the diaphragm comprises: When the butterfly part is fitted into the opening, the butterfly part is mounted in a state where the diameter is enlarged along the radial direction and tension is applied, and the connection between the diaphragm insert tool and the slider moves the butterfly part toward the slider. It is characterized in that the slider is pulled in and attached to the slider side under tension. By the electromagnetic coil or the like in a thin, to keep the electromagnetic force in the same Mai has just away between the magnetic force, but reciprocation of the slider may become unsmooth, by attaching the above diaphragm, the power The slider reciprocates in a stable state irrespective of the frequency and the power supply voltage, and is smoothly performed at a constant cycle, and can always discharge a constant amount of air.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a low-noise electromagnetic air pump and an assembling method of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a view showing an external structure of a low-noise electromagnetic air pump 1 according to the present invention. FIG. 1A is an external perspective view of the low-noise electromagnetic air pump 1 viewed from the left side and the right side, and FIG. 1B is a top view of FIG. 1A, and FIG. 1C is a front view of FIG. 2 is a sectional view taken along line AA of FIG. 1B, FIG. 3 is a sectional view taken along line BB of FIG. 1C, FIG. 4 is a sectional view taken along line CC of FIG. FIG. 5 is a cross-sectional view taken along line DD of FIG. FIG. 12 is a perspective view showing all components of the low-noise electromagnetic air pump 1 of the present invention in a divided manner.
[0015]
As shown in FIG. 12, a low-noise electromagnetic air pump 1 is roughly divided into a case 2, a diaphragm 3, and a pump head 4 (only the left pump head 4 is shown in FIG. Are disposed), the electromagnetic coil 5 and the like, and the slider 6 and the like having the magnet 7.
[0016]
The case 2 is made of a block-shaped cube as shown in FIGS. 2, 3, 4, and 5, and is made of, for example, an aluminum material. As shown in FIGS. 4, 6, and 7, a plurality of (four in the drawing) air passages 8 are formed in a long groove shape on the upper surface side. For convenience of explanation, as shown in FIG. 4, two air passages are arranged symmetrically, and this air passage 8 extends from one air inlet 9 to one air outlet 10. Named as a first air passage 8a, a second air passage 8b, a third air passage 8c, and a fourth air passage 8d, the air flowing in from the air inlet 9 is located on the left and right sides of the second air passage 8b. The air flows dispersedly to the pump heads 4a and 4b, and the air discharged from the both-side pump heads 4a and 4b in the third air passage 8c merges and is discharged from one air discharge port 10.
[0017]
Further, an air inlet pipe 9a is connected to the portion of the air inlet 9 of the first air passage 8a so as to protrude forward from the side surface of the air pump, and is connected to the portion of the air discharge port 10 connected to the fourth air passage 8d. Is connected with the air discharge pipe 10a protruding forward. As shown in FIGS. 2 and 3, a space for accommodating the electromagnetic coil 5 and the like, the slider 6 and the like is formed inside the case 2, and an opening into which the diaphragm 3 fits is formed on the left side or the right side. Openings 11 and 11 are formed. Further, as shown in FIG. 5, the lower surface of the case 2 is open.
[0018]
As shown in FIGS. 4 and 6, bulging chambers 12, 13, and 14 are formed in the first air passage 8a, and reduction chambers 15, 16, and 17 are formed adjacent thereto. A bulging chamber 18 is formed in a passage connecting the first air passage 8a and the second air passage 8b. The fourth air passage 8d is also formed with bulging chambers 12d, 13d, 14d and reduction chambers 15d, 16d, 17d, and a passage connecting the fourth air passage 8d and the third air passage 8c is provided in the fourth air passage 8d. A bulging chamber 18d is formed. As shown in FIG. 7, through holes 19 and 19a are formed in the left and right sides of the second air passage 8b, and the through holes 20 and 19a are also formed in the left and right sides of the third air passage 8c. , 20a are formed through.
[0019]
As shown in FIG. 4, an orifice 21 having a small-diameter through-hole 21a therein is fitted into a tip of the air inflow pipe 9a, and an orifice 22 having a small-diameter through-hole 22a therein is also provided at the tip of the air discharge pipe 10a. It is fitted. As shown in FIG. 6, an orifice 23 is fitted in the bulging chambers 13 and 13d, and a filter 24 is fitted in the bulging chambers 18 and 18a, respectively. The orifice 23 is formed by enclosing a metal tube 23a having a small diameter through-hole with a polymer material 23b to reduce noise and improve mounting and adhesion. Thus, since it is formed by the metal tube, it is not crushed even if pressed, and the hole diameter is maintained. The filter 24 is made of a fine mesh. As the polymer material 23b, a flexible material such as rubber or soft resin is used. Thereby, it can be fitted airtightly into the bulging chambers 18 and 18a. The orifice 21 and the filter 24 can be arbitrarily arranged in the bulging chambers 12, 13, 18 and 12d, 13d, 18d.
[0020]
As shown in FIGS. 2, 3, 5, 8, and 12, the electromagnetic coil unit 25 holds the electromagnetic coil 5, bobbins 26 that sandwich the electromagnetic coil 5, and the entirety of the electromagnetic coil 5 and the bobbin 26. And a core 27 fixed to the case side. The electromagnetic coil section 25 is composed of a pair of opposed coils, and the slider 6 is interposed between the electromagnetic coil sections 25. The slider 6 includes a slider case 28 and a magnet 7 fitted therein. A protrusion 30 having a square hole 29 into which the diaphragm insert 34 is inserted is integrally formed on the left and right ends of the slider case 28.
[0021]
As shown in FIGS. 2, 3, 9, and 12, the diaphragm 3 is integrally connected to a disc-shaped butterfly portion 31 that fits into the opening 11 of the case 2 by protruding from a part of the outer periphery thereof. And a tongue portion 32 to be formed. As shown in FIG. 9, a pair of communication holes 33, 33 are formed through the tongue portion 32, and the communication holes 33, 33 are formed in the second air passage 8 b and the third air passage 8 of the air passage 8 of the case 2. 8c are formed so as to communicate with the through holes 19, 19a and 20, 20a. A diaphragm insert 34 is fixed to the center of the butterfly section 31. As shown in FIGS. 2 and 3, the diaphragm insert 34 includes a flange 35 buried and fixed in the butterfly portion 31 and a projection 36 having a rectangular cross section projecting from the flange 35. Reference numeral 36 denotes a shape which is fitted into the square hole 29 of the projection 30 of the slider case 28.
[0022]
The fixing of the diaphragm insert 34 with the projection 30 is performed by a diaphragm fixing screw 37 screwed into a screw hole threaded on one side of the projection 36. Further, when the diaphragm 3 is mounted on the case 2 side, the diaphragm 3 is mounted so that its front surface slightly protrudes from the end surface of the case 2 and is formed to function as a sealing member. As shown in FIG. 9, a detent part 38 is formed on the outer periphery of the butterfly part 31 of the diaphragm 3 so as to fit into a concave part (not shown) provided on the case 2 side. By the method of fixing the rotation stopper 38 and the diaphragm insert 34 with the diaphragm fixing screw 37, the diaphragm 3 is mounted on the case 2 in a correct posture without rotating in the rotation direction.
[0023]
Next, the structure of the pump head 4 which is connected and fixed to the left side or right side of the case 2 with the diaphragm 3 interposed therebetween will be described with reference to FIGS. 1, 2, 3, 6, 10, 11, and the like. FIG. 10 shows a pump head 4a connected to the left side of the case 2, and FIG. 11 shows a pump head 4b connected to the right side of the case 2.
[0024]
As shown in FIG. 10, the main body case 39 is formed of a block body having a convex shape as a whole, and is fixed to the left and right end surfaces of the case 2 in a state of being sealed by the diaphragm 3 as shown in FIGS. First, on the upper side of the main body case 39, through holes 40 and 41 communicating with the through hole 19 of the second air passage 8b and the through hole 20 of the third air passage 8c of the case 2 are formed to penetrate. Further, as shown in FIG. 10A, a first air chamber 42 is provided on the left side of the main body case 29 so as to protrude therefrom. The first air chamber 42 is defined by a rear first air chamber 42a and a front first air chamber 42b of two separated chambers, and a through hole 40 communicates with the rear first air chamber 42a. The through-hole 41 communicates with the front-side first air chamber 42b.
[0025]
Further, as shown in FIG. 10B, a substantially circular second air chamber 43 is provided at a position facing the first air chamber 42 on the right side of the main body case 39. The second air chamber 43 is formed at a position where the abdominal diaphragm 3 just engages with the pump head 4a fixed to the case 2 side. As shown in FIGS. 10A and 10B, a large number of air holes 44 penetrate the wall between the first air chamber 42a and the second air chamber 43 on the back side. On the side of the second air chamber 43 which is formed, there is provided a bulk valve 45 for completely closing the air hole 44 and contacting the wall. The bulk valve 45 is made of a rubber-like flat plate, but is not limited to this. Also, a large number of air holes 46 are formed in the wall between the back side second air chamber 42b and the second air chamber 43 by penetrating the wall. Further, on the front side first air chamber 42b side, there is provided a bulk valve 47 which closes the air hole 46 and is in close contact with the wall. With the above structure, the air introduced from the through hole 40 enters the first air chamber 42 a on the back side, is introduced into the second air chamber 43 from the air hole 44 by opening the bulk valve 45, and further from the air hole 46. When the bulk valve 47 is opened, it is introduced into the first air chamber 42b on the front side and is introduced into the third air passage 8c of the case 2 from the through hole 41 communicating therewith.
[0026]
FIG. 11 shows a pump head 4b fixed to the right side of the case 2, and the overall structure is the same as that of the above-described pump head 4a. For convenience of explanation, reference numerals of parts performing the same functions as those in FIG. 10 are indicated by reference numerals in FIG. 10 with a B suffix added. The through hole 40B communicates with the through hole 19a of the second air passage 8b of the case 2, and the through hole 41B communicates with the through hole 20a of the third air passage 8c of the case 2.
[0027]
Next, a method of assembling the low noise electromagnetic air pump 1 will be described. First, an electromagnetic coil part 25 including an electromagnetic coil 5, a bobbin 26, a core 27 and the like is inserted into the assembly case 2, and a slider 6 having a magnet 7 fixed in a slider case 28 is held between the electromagnetic coil parts 25,25. These are stored in the case 2. On the other hand, the slider 6 is fixed to the slider 6 by using a slider fixing screw 37 using a diaphragm insert tool 34 formed integrally with the diaphragm 3. Openings 11 and 11 of case 2 are closed by diaphragms 3 and 3, and an air inflow pipe 9 a and an air discharge pipe 10 a with orifices 21 and 22 mounted thereon are connected to left and right end surfaces thereof. In the air passage 8 of the case 2, orifices 23, 23a and a filter 24 are mounted. On the other hand, the pump heads 4a and 4b are assembled and fixed to the left and right surfaces of the case 2. Next, as shown in FIG. 12, the packing 48 is placed on the upper surface of the case 2 and the upper surface is closed by the upper case cover 49. Further, the opening sides of the pump heads 4a and 4b are closed by a pump head cover 51 via a packing 50. The lower surface of the case 2 is closed by a lower case cover 53 via a packing 52. In addition, a vibration-proof rubber 54 is attached below the lower case cover 53 to elastically support the whole.
[0028]
Next, a method of assembling the diaphragm 3 will be described with reference to FIG.
The diaphragm 3 is not simply mounted on the case 2 side in a free state. In the present invention, the diaphragm 3 is mounted on the case 2 side by the following assembling method. The butterfly portion 31 of the diaphragm 3 is previously formed to have a smaller diameter than the opening portion 11 of the case 2, and is mounted and fixed in the opening portion 11 of the case 2 in a state where tension is applied outward in the radial direction. On the other hand, the diaphragm insert 34 formed integrally with and fixed to the center of the diaphragm 3 is pulled toward the slider 6, and the tension is applied in the axial direction, and the diaphragm insert 34 is moved to the corner of the projection 30 of the slider case 28. It is inserted into the hole 29 and fixed by the diaphragm fixing screw 37. That is, as shown in FIG. 13, the diaphragm 3 is mounted on the case 2 and the slider 6 with tension applied inward in the radial direction and the axial direction.
[0029]
In the case of the low-noise electromagnetic air pump 1 of the present invention, the electromagnetic coil section 25 needs to be thin and compact. If the electromagnetic coil part 25 and the slider 6 are formed thin and the whole is formed into a small shape, the slider 6 does not smoothly reciprocate at a constant speed due to the power supply frequency or the power supply voltage as it is, and irregular reciprocation. It has become. As a result, the air discharge amount was unstable.
Thus, as described above, it has been proved that irregular operation of the slider 6 can be prevented by assembling the diaphragm 3 by applying a radial tension or an axial tension thereto, and smoothness can be completely achieved. In addition, since the pump heads 4a and 4b have the above-described structure, the pump heads 4a and 4b can be easily assembled to the case 2 side. In addition, as described above, by arranging one air inflow pipe 9a and one air discharge pipe 10 so as to protrude from the air pump, it is possible to avoid the interference noise (wind noise) of the gas of the supply and exhaust, and to reduce the noise. I can do it. In addition, low vibration can be achieved by elastically supporting the whole by the vibration-proof rubber 54.
[0030]
Next, the pumping action of the low noise electromagnetic air pump 1 of the present invention will be described. As shown in FIG. 4, the air is introduced from the air inflow pipe 9 a, narrowed by the through hole 21 a of the orifice 21, and then enters the air inlet 9. Here, the suction noise is reduced due to the air resistance. The introduced air enters the first air passage 8 a of the air passage 8 and is adjacent to the bulging chamber 12. The noise is reduced by the reduction chamber 15, the noise is reduced by the orifice 23 mounted in the expansion chamber 12, and the noise is repeatedly reduced and expanded by the reduction chamber 16, the expansion chamber 14, and the reduction chamber 17 to reduce the noise. The noise is further reduced by the filter 24 in the chamber 18 and enters the second air passage 8b. For convenience of explanation, assuming that the through-hole 19 shown in FIG. 7 can communicate with the pump head 4a side and the through-hole 19a does not communicate with the pump head 4b side, the inside of the second air passage 8b Enters the pump head 4a side shown in FIG.
[0031]
Specifically, as shown in FIG. 10A, the pump head 4a communicates with the through hole 19 and enters the through hole 40 of the pump head 4a, and enters the first air chamber 42a on the right side of the first air chamber 42. Here, since the bulk valve 45 is open due to the suction action of the diaphragm 3, the air in the first air passage 42a on the right passes through the air hole 44 and enters the second air chamber 43 shown in FIG. 10B. . In this state, the diaphragm 3 operates in the reverse direction, and the second air chamber 43 receives a pressing force. For this reason, the bulk valve 45 is closed and the bulk valve 47 is opened. Accordingly, the air enters the first air chamber 42b on the left side of the first air chamber 42 through the air hole 46. Since the first air chamber 42b on the left side communicates with the through hole 41, air is introduced into the through hole 20 on the case 2 side communicating with the through hole 41, enters the third air passage 8c, and enters the fourth air chamber 4c. It is introduced into the air passage 8d. Since there is a filter 24 attached to the bulging chamber 18d between the third air passage 8c and the fourth air passage 8d, the air is throttled here and enters the fourth air passage 8d. In the fourth air passage 8d, similarly to the structure in the first air passage 8a, the orifice 23 provided in the reduction chamber 17d, the expansion chamber 14d, the reduction chamber 16d, and the expansion chamber 13d, 15d, there is a bulging chamber 12d, the air undergoes resistance and is reduced in noise, proceeds to the air discharge port 10 side, and is discharged from the air discharge pipe 10a through the through hole 22a of the orifice 22. Thus, the air is discharged in a state where the noise is significantly reduced.
[0032]
Since the diaphragm 3 moves abdominally, the above-described flow of suction and discharge of air is simultaneously performed on the rear side of the case 2 in FIG. 4, and the same operation is performed and discharged by the pump head 4b on the rear side. Note that the flow of air suction and discharge using the pump head 4b on the back side is redundant and will not be described. It is to be noted that the pump head 4b in FIG. 11 corresponds to the same component in FIG.
[0033]
As described above, the diaphragms 3, 3 mounted on both side ends of the case 2 are operated in opposite directions by the reciprocating motion of the slider 6 operated by the electromagnetic coil portion 25, so that the diaphragms 3 move abdominally. As a result, the suction and discharge of air in the air passage 8 of the case 2 is performed in accordance with the forward and backward movement of the slider 6, but the air always flows from the air inlet pipe 9 a toward the air discharge pipe 10 a. By proceeding in the passage, a smooth pumping action is performed. As described above, since the air receives the resistance in the air passage 8, the noise can be significantly reduced. Further, as described above, the diaphragm 3 is neatly moved by the slider 6 which operates smoothly due to the method of assembling the diaphragm 3, and operates without generating noise. As described above, the noise can be significantly reduced as compared with the conventional air pump. Further, the low-noise electromagnetic air pump 1 of the present invention is compactly assembled around the case 2 as described above and is formed in a small size, so that it has extremely good mountability and mountability. In addition, each component can be easily removed in the set state, thereby improving maintainability. Further, since the vibration isolating rubber 54 is used and the vibration generated from each component is small, the vibration can be significantly reduced. Further, the wind noise can be significantly reduced by the protruding arrangement of the air inflow pipe 9a and the air discharge pipe 10a.
[0034]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the low-noise electromagnetic air pump of the present invention and the method of assembling the same, the diaphragm on both the left and right sides can be smoothly abducted by one air inflow pipe and one discharge pipe, and air can be supplied. In addition, low noise, low vibration, and compactness and compactness are achieved, and handling, equipment, and maintenance are greatly improved.
[Brief description of the drawings]
FIG. 1 is a perspective view (a), a top view (b), and a front view (c) showing an external structure of a low-noise electromagnetic air pump of the present invention.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a sectional view taken along line BB of FIG. 1;
FIG. 4 is a sectional view taken along line CC of FIG. 1;
FIG. 5 is a sectional view taken along line DD of FIG. 1;
FIG. 6 is a perspective view showing a case of a low noise electromagnetic air pump of the present invention and a pump head mounted on the case.
FIG. 7 is a top view of the case of the low-noise electromagnetic air pump of the present invention.
FIG. 8 is a perspective view showing a low-noise electromagnetic air pump electromagnetic coil section of the present invention.
9 is a perspective view (a) and (c) and a top view (b) showing a diaphragm in the low noise electromagnetic air pump of the present invention.
10A and 10B are a left side perspective view and a right side perspective view of a left side pump head of the low noise electromagnetic air pump of the present invention.
FIGS. 11A and 11B are a left side perspective view and a right side perspective view of a right pump head of the low noise electromagnetic air pump of the present invention. FIGS.
FIG. 12 is a divided perspective view showing each component of the low noise electromagnetic air pump of the present invention.
FIG. 13 is a schematic diagram for explaining a method for assembling the diaphragm and the slider of the low-noise electromagnetic air pump of the present invention.
FIG. 14 is a schematic view showing a conventional diaphragm connection structure.
[Explanation of symbols]
1 low noise electromagnetic air pump
2 cases
3 diaphragm
4 Pump head
5 Electromagnetic coil
6 Slider
7 magnet
8 air passage
9 Air inlet
9a Air inlet pipe
10 Air outlet
10a Air discharge pipe
11 Opening
12 bulge chamber
12d bulging room
13 bulge chamber
13d bulging chamber
14 bulge chamber
14d bulging chamber
15 Reduction room
15d reduction room
16 reduction room
16d reduction room
17 Reduction room
17d reduction room
18 bulging chamber
18d bulging room
19 Through hole
19a Through hole
20 Through hole
20a Through hole
21 orifice
21a Through hole
22 orifice
22a Through hole
23 orifice
23a metal tube
23b Polymer material
24 Filter
25 Electromagnetic coil
26 bobbins
27 core
28 Slider case
29 square hole
30 Projection
31 Butterfly section
32 Tongue section
33 Communication hole
34 Diaphragm insert tool
35 Tsubabe
36 Projection
37 Diaphragm fixing screw
38 Detent
39 Body case
39B body case
40 through hole
40B Through hole
41 Through hole
41B Through hole
42 First air chamber
42B first air chamber
42a Back side first air chamber
42aB Back side first air chamber
42b Front side first air chamber
42bB Front side first air chamber
43 Second air chamber
43B Second air chamber
44 air vent
44B air hole
45 Bulk valve
45B Bulk valve
46 air vent
46B air hole
47 Bulk valve
47B Bulk valve
48 Packing
49 Top case cover
50 Packing
51 Pump head cover
52 Packing
53 Bottom case cover
54 Anti-vibration rubber

Claims (6)

An air pump formed to operate the diaphragm by electromagnetic force and reduce noise,
The air pump has one air inlet and one air outlet on the upper surface side, forms an air passage communicating with the air inlet and the air outlet, and has a thin electromagnetic coil and electromagnetic force inside. A block-shaped case that houses a slider that reciprocates, and that has openings at both end surfaces near both ends of the slider;
A diaphragm fitted into the opening and abdominally moved by the slider;
A pump head which covers the diaphragm, is fixed to the both end surfaces of the case, and has a pair of bulk valves which open and close in accordance with the abdominal motion of the diaphragm and form an air chamber which can communicate with the air passage side;
The air that has flowed in from one air inlet is distributed to the pump heads on both sides, merged from the pump heads on both sides and discharged from one air outlet, and the air inlet, the air outlet, and A low-noise electromagnetic air pump, wherein an orifice or a filter for reducing flow rate and noise is provided in the air passage, and the diaphragm has a shape interposed as a seal member between the case and the pump head. 2. The low-noise electromagnetic air pump according to claim 1, wherein the filter is formed of a fine mesh, and the orifice is formed by enclosing a metal tube forming the air passage hole with a polymer material. . The diaphragm includes a butterfly portion fitted into an opening of the case and a tongue portion integrally formed on a part of an outer periphery of the butterfly portion. The butterfly portion and the tongue portion are formed by the case and the pump head. The low-noise electromagnetic air pump according to claim 1, wherein a communication hole which functions as a seal part interposed between the case and the tongue part is formed in the tongue part and communicates with the air passage side of the case. The diaphragm insert tool is fixed to the center of the butterfly portion of the diaphragm, and the diaphragm insert tool is inserted into the slider and connected to the slider by screwing from a side surface. 3. The low-noise electromagnetic air pump according to any one of 3. The electromagnetic coil is disposed so as to face each other across the slider, and the total thickness of the electromagnetic coil and the slider combined is substantially equal to the diameter of the diaphragm. Item 2. A low-noise electromagnetic air pump according to Item 1. A method for assembling the diaphragm and the slider of the low-noise electromagnetic air pump according to claim 1, wherein:
The diaphragm is attached in a state where the diameter thereof is expanded in a radial direction and a tension is applied when the butterfly portion is fitted into the opening, and the connection between the diaphragm insert tool and the slider is performed by the butterfly portion. And a method for assembling the low-noise electromagnetic air pump, wherein the air pump is attached to the slider side with tension applied to the slider side.

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