JPH0821363A - Vibration pump - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a vibration pump that can reduce the size and weight of the entire pump. [Structure] An electromagnetic coil 1 having a substantially cylindrical shape in which a coil is wound in a cylindrical shape in an annular core, and a vibrator 5 arranged in the electromagnetic coil 1 are provided. The oscillator 5 includes a permanent magnet 6 that is polarized in the axial direction, and pole pieces 7a that are magnetized by the permanent magnet 6 on both polar surfaces of the permanent magnet 6.
7b and 7c are provided, and the diaphragm is connected to both ends thereof. The present vibration type pump is characterized by the arrangement of the respective parts. The center line X-X divides the electromagnetic coil 1 into line symmetry and the center line X-X divides the axial width W1 of the pole pieces 7a and 7c into two. And the center line Y-Y that bisects the axial width W4 of one magnetic pole M of the annular core 2 and the center line YY that bisects the distance W5 between the pole pieces. It is configured to let.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vibration pump.
More specifically, the present invention relates to a vibratory pump in which a portion that attracts or repels between an electromagnetic coil and a permanent magnet is effectively obtained in an axial direction, and can be reduced in size and weight. INDUSTRIAL APPLICABILITY The pump of the present invention can be applied as a low-pressure pump to the fields for supplying air and water for septic tanks, fish farming, physics and chemistry, etc.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional vibration type pump for sucking and discharging a fluid by utilizing the vibration of a vibrator provided with a permanent magnet based on the magnetic interaction between an electromagnet and a permanent magnet. Fig. 7 proposed by the present applicant
There is the form shown in

FIG. 5 shows a drive unit of a vibration type pump having a vibrator 5 having a single shaft 4 supporting a permanent magnet 6. The electromagnetic coil 1 has a cylindrical shape with the axis 4 as the center, and includes an annular core 2 and a coil 3 wound in the annular core 2 in a cylindrical shape. The annular core 2 is a so-called half-split type, in which two core members 2a and 2b having a substantially C-shaped cross section are abutted with each other in a line-symmetric manner.

The permanent magnet 6 is magnetized so as to be polarized in the axial direction. A cup-shaped pole piece (pole piece) 7 having a C-shaped cross section is magnetized by the permanent magnet 6 on both pole faces of the permanent magnet 6. It is provided to be able to. That is, since a remote action occurs due to the magnetic force between the magnetized pole piece 7 and the electromagnetic coil 1, the pole piece 7 needs to be provided at a predetermined position in relation to the electromagnetic coil 1. But,
Since it is difficult to adjust the thickness of the permanent magnet 6 provided between the pole pieces 7 due to its performance, a magnetic material such as an iron plate 35 is interposed, and the hole piece 7 is magnetized by the permanent magnet 6, and It is adjusted so that it is provided at a predetermined position. In FIGS. 1 to 4 and FIG. 6, the thing corresponding to the iron plate 35 for adjustment is not described, but the distance between the pole pieces 7 (W5 shown in FIG. 2) as in FIG.
Can be adjusted. In addition, both ends 4a, 4b of the shaft 4
Is connected to a shaft (not shown), and the shaft supports the shaft 4 so as to be located at the center of the electromagnetic coil 1.

The operation of the drive unit of the vibration type pump shown in FIG. 5 will be described with reference to FIG. The permanent magnets 6 which are magnetized so as to be polarized in the axial direction are attached so as to be adjacent to each other with their repulsive surfaces facing each other. Thereby, for example, the pole piece 7a is magnetized to the N pole, the pole piece 7b is magnetized to the S pole, and the pole piece 7c is magnetized to the N pole.

[0006] The three electromagnetic coils 1 connected in the axial direction are provided so that the working air gap magnetic flux generated according to the applied commercial alternating voltage repels the adjacent electromagnetic coils 1.

Further, the electromagnetic coil 1 and the vibrator 5 have a center line X-X that equally divides the electromagnetic coil 1 in line symmetry and a center line X that divides the axial width W1 or W2 of the pole piece 7 into two parts.
-X is arranged so as to match.

When an alternating current is supplied to the electromagnetic coil 1, N-poles and S-poles are alternately formed at both ends in the axial direction of the electromagnetic coil 1 in synchronization with the change of the alternating current, thereby forming a toroidal core which is a magnetic material. Since the magnets 2 are also magnetized in synchronization with the change of the alternating current, magnetic poles having different polarities appear alternately at their tips M. In this way, an attractive force and a repulsive force are generated between the magnetic pole of the inner peripheral end M which is alternately converted and the outer peripheral surface of the pole piece 7 which is magnetized to a fixed pole by the permanent magnet. For example, in a certain period, an attractive force and a repulsive force are generated in the direction of the arrow in FIG. 6, and the vibrator 5 moves leftward in FIG. However, in the next cycle, an attractive force and a repulsive force are generated in the direction opposite to the arrow in FIG. Thus, the vibrator 5 reciprocates and drives the diaphragm connected to both ends of the vibrator 5. When the diaphragm vibrates, the volume of the pump compression chamber provided facing the diaphragm changes, and a fluid such as air or water is sucked into the pump compression chamber by the pressure change and discharged.

As described above, the center line X-X that equally divides the electromagnetic coil 1 in line symmetry and the axial width W1 or W2 of the pole piece 7 provided in contact with the pole surface of the permanent magnet 6 are 2
In a conventional vibrating pump configured so that the dividing center line XX coincides, a maximum of two attractive or repulsive forces can be generated by one electromagnetic coil. For example, in FIG. 6, three electromagnetic coils 1 are connected in the axial direction, and there are six places where attractive force and repulsive force are generated in the axial direction as a whole.

The vibrating pump shown in FIG. 7 is a so-called active pump, in which two vibrators 85 are configured to make symmetrical movement, and are provided facing the diaphragm 91. Since the compression and expansion of the pump compression chamber 92 is repeated at the same cycle, the vibrations caused by the compression and expansion can be canceled out, and the effect of noise reduction can be obtained.

In FIG. 7, the electromagnetic coil 81 has a substantially cylindrical shape as in FIG. The vibrator 85 has a configuration in which a permanent magnet 86 is provided on the outer periphery of a frame 84 having a bell shape. The bell-shaped frame 84 is swingably supported on the outer circumference of a cylindrical support 87, and its tip is connected to the diaphragm 91. The permanent magnet 86 has an annular shape and is magnetized so as to be polarized in the radial direction. For example, in FIG. 7, the inner diameter side is a north pole and the outer diameter side is a south pole.

In the vibration type pump shown in FIG. 7, a center line XX which equally divides the electromagnetic coil 81 in a line symmetrical manner and a center line XX which divides the axial width W3 of the permanent magnet 86 into two parts. It is configured to match.

When an alternating current is applied to the electromagnetic coil 81, magnetic poles having different polarities appear alternately at the inner peripheral end.
An attractive force and a repulsive force are generated between this and the magnetic pole on the outer diameter side of the permanent magnet 86. For example, in a certain period, an attractive force and a repulsive force are generated in the direction of the arrow in FIG. 7, and the vibrator 85 moves leftward in FIG. However, in the next cycle, an attractive force and a repulsive force are generated in the direction opposite to the arrow in FIG. 7, so that the vibrator 85 moves rightward in FIG. Thus, the vibrator 85 reciprocates and drives the diaphragm 91 connected to one end of the vibrator 85.

When the diaphragm 91 moves to the left on the left side of FIG. 7, the pressure in the pump compression chamber 92 provided facing the diaphragm 91 increases, the discharge valve 93 opens, and fluid such as air flows from the discharge port 94. Is discharged. Next, when the diaphragm 81 moves to the right, the pressure of the pump compression chamber 92 becomes a negative pressure, so that a fluid such as air is sucked toward the pump compression chamber 92 from the suction port 95.

The vibration type pump shown in FIG.
The maximum attractive force or repulsive force that can be generated by one electromagnetic coil is two, and since it is a symmetrical configuration, the attractive force and the repulsive force are generated in four places in the axial direction as a whole.

[0016]

In the vibration type pump shown in FIGS. 5 and 6, three electromagnetic coils are connected in the axial direction, and the connected electromagnetic coils themselves become considerably large. In addition, the vibrator also becomes large and heavy in the axial direction in accordance with the vibration, so that there is a problem that vibration does not occur effectively. Therefore, no matter how many electromagnetic coils are connected, pump performance in proportion to the connection cannot be obtained. The active vibration type pump shown in FIG. 7 has the same problem.

In view of the above circumstances, it is an object of the present invention to provide a vibration type pump which can be reduced in size and weight and which has a conventional size and can improve pump performance.

[0018]

A vibration type pump according to the present invention is provided with an electromagnetic coil having a substantially cylindrical shape in which a coil is wound cylindrically in an annular core, and disposed in the electromagnetic coil. A permanent magnet polarized in the axial direction, a pole piece provided on both pole faces of the permanent magnet so as to be magnetized by the permanent magnet, and a diaphragm connected to at least one end for supporting the permanent magnet and the pole piece. A vibrating pump in which the diaphragm is driven by electromagnetic vibration of the vibrator based on a magnetic interaction between the electromagnetic coil and a permanent magnet, wherein the electromagnetic coil is linearly symmetric and the like. The center line to be divided and the axial width of the pole piece
And a center line that bisects the axial width of one of the magnetic poles of the annular core and a center line that divides the distance between the pole pieces into two. It is characterized by becoming.

[0019]

In the vibration type pump of the present invention, the center line which equally divides the electromagnetic coil into a line symmetry and the center line which bisects the axial width of the pole piece magnetized by the permanent magnet are matched. Attraction and repulsion are generated between the two magnetic poles of the annular core constituting the electromagnetic coil and one pole piece.

Further, the center line dividing the axial width of one of the magnetic poles of the annular core into two and the center line dividing the distance between the pole pieces into two are matched. As a result, an attractive force and a repulsive force are generated between one magnetic pole of the annular core and two pole pieces provided on both pole faces of the permanent magnet.

With such a configuration, there are three locations where an attractive or repulsive force can be generated in one axial direction for one electromagnetic coil. Therefore, the number of electromagnetic coils can be reduced as compared with the conventional one, and the size and weight can be reduced. Further, even if the number of electromagnetic coils is the same, the pump performance can be improved.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vibration type pump according to the present invention. 1 and 2 show a structure in which a diaphragm 13 is connected to both ends of a vibrator 5 composed of a single shaft 4, and the conventional vibration type pump described with reference to FIGS. 5 and 6 is improved. It was done. FIGS. 3 and 4 show a so-called active type in which two vibrators are configured to move symmetrically, which is an improvement of the conventional vibratory pump described with reference to FIG. .

FIG. 1 is an explanatory side sectional view of an embodiment of the vibration type pump of the present invention. 1 and 2, components having the same functions as those of the conventional device shown in FIGS. 5 and 6 are designated by the same reference numerals. In addition, a pair of elements such as a diaphragm on both end sides of the vibrator is given the same reference numeral.

The vibration type pump shown in FIG. 1 has two electromagnetic coils 1 arranged in a frame 11. The two diaphragms 13 are the frame 11 and the two casings 1.
2 and supported. Further, both ends of the shaft 4 of the vibrator 5 are attached to the center of the diaphragm 13 via a center plate 14 and an attachment seat 15.

A pump compression chamber 16 is formed in the casing 12, and when the vibrator 5 vibrates, the pump compression chamber 16 is formed.
Compress and expand. A suction valve 18 is provided in the pump compression chamber 16.
And a discharge valve 19 is provided. The suction valve 18 communicates with the inside of the frame 11 through a communication passage provided inside the casing 12. Further, suction ports 20 and 21 are formed in the upper part of the frame 1, and the suction ports 20
A filter is provided in the space 22 between and 21. The air sucked from the suction port 21 passes through the filter and reaches the suction valve 18 from the suction hole 20. The discharge valve 19 communicates with the air tank 26 formed in the lower part of the frame 11 from the communication passage 25, and further communicates with the discharge port 27 provided on the side surface of the air tank 26. A hose or the like is connected to the discharge port 26 to send out the air sucked from the suction port 21 to a required location.

The suction valve 18 and the discharge valve 19 are opened and closed by the pump compression chamber 16. That is, the pump compression chamber 16
When the pump expands, the suction valve 18 opens to suck air from the suction port 21, and when the pump compression chamber 16 is compressed, the discharge valve 19 opens to discharge air from the discharge port 27 instead of closing the suction valve 18.

Although the frame 11 and the casing 12 shown in FIG. 1 are constructed for the purpose of sucking air, the present invention is not limited to this, and other liquids such as gas and water are sucked and filtered. It can be appropriately changed to one having a structure for discharging. Also, the casing 12 and the frame 11
Are metals such as aluminum and iron, PET, PPS,
It is made of a synthetic resin such as ABS and is screwed to each other by, for example, a screw 28. In particular, since the frame 11 has a constant cross-sectional shape, it can be manufactured by drawing aluminum or by injection molding a thermoplastic resin such as PET.

The electromagnetic coil 1 is provided in the frame 11. The electromagnetic coil 1 includes an annular core 2 and a coil 3 wound in the annular core 2 in a cylindrical shape. FIG.
The annular core 2 shown in FIG.
-42464) is used. This is a pair of core members 2a having a substantially C-shaped cross section.
2b are axisymmetrically butted, and it is only necessary to abut two identically shaped ones, which facilitates manufacturing,
Cost reduction by mass production can be achieved. However, the present invention is not limited to this, and as is well known, an annular core 2 having a shape in which silicon steel plates are stacked and inserted into an outer cylinder can be used.

For forming the annular core 2, it is preferable to use a normal iron plate or a magnetic steel plate having a thickness of about 2 to 3 mm from the viewpoint of low cost. However, it is also possible to use an iron plate, a silicon steel plate, or the like having a thickness of about 0.5 to 1 mm and two to several layers laminated in addition to one piece. When such a laminate is used, iron loss is reduced, and efficiency can be improved.

A vibrator 5 disposed inside the electromagnetic coil 1
Has a disk-shaped permanent magnet 6, and a cup-shaped pole piece (magnetic pole piece) 7 having a C-shaped cross section for effectively forming a magnetic path is fixed to both pole faces of the permanent magnet 6. . As a method for attaching the permanent magnet 6 and the pole piece 7 to the shaft 4, the permanent magnet 6 and the pole piece 7 may be directly fixed by an adhesive agent. However, as in the prior art of FIG. It may be fixed to the shaft 4 via a sleeve 31 for caulking. In this case, the retaining rings 32 are fixed to both ends of the sleeve 31.

In the present embodiment, the applicant's application (Japanese Patent Laid-Open No. 6-
No. 42464), a so-called cup-shaped pole piece having a C-shaped cross section is used. By adopting such a cup-shaped shape, the overlapping dimension (H1 in FIG. 5) with the annular core and the gap (FIG.
H2) is easy to adjust, and a weight or the like for adjusting the weight of the vibrator 5 can be arranged in the cup. Also, two permanent magnets 6
The pole piece 7b provided between them can be formed by symmetrically abutting two cup-shaped members.
However, the shape of the pole piece 7 is not limited to this, and a simple cylindrical shape or a well-known disk (including lamination) shape can also provide the same effect in the present invention.

The permanent magnet 6 has a disk shape and is magnetized so as to be polarized in the axial direction. The distance (W5 in FIG. 2) between the pole pieces 7 on both pole surfaces of the permanent magnet 6 is determined by the electromagnetic force because both pole pieces 7 receive an attractive force and a repulsive force from one magnetic pole M (see FIG. 2) of the electromagnetic coil 1. It is smaller than the width of one magnetic pole of the coil 1. Therefore, the amount of the iron plate 35 inserted for adjusting the gap between the pole pieces 7 can be reduced as compared with the conventional vibration type pump shown in FIG. Therefore, the weight can be reduced. As the permanent magnet 6, a ferrite magnet, a rare earth magnet, or the like can be used.

Both ends of the shaft 4 of the vibrator 5 are connected to a diaphragm 1 made of EPDM or the like via a center plate 14.
It is connected to 3. The center plates 14 are provided on both sides of the diaphragm 13,
3 is an element which is pushed and pulled to displace left and right (in FIG. 1). The center plate 14 and the diaphragm 13 are interposed between the nut 29 and the mounting seat 15, and are fixed to the tip of the vibrator 5 by being tightened by the nut 29. The peripheral edge portion 13 a of the diaphragm 13 is sandwiched between the frame 11 and the casing 12.

FIG. 2 is a sectional explanatory view for explaining in detail the arrangement of the electromagnetic coil 1, the permanent magnet 6 and the pole piece 7 which is the characteristic of the vibration type pump of the present invention. The disk-shaped permanent magnet 6 is magnetized so as to be polarized in the axial direction, and the two permanent magnets 6 are provided in parallel with their repulsive surfaces facing each other. The two electromagnetic coils 1 are also provided in parallel so that magnetic fluxes generated alternately repel each other between the adjacent electromagnetic coils 1. Due to the operation of the electromagnetic coil 1, magnetic poles are alternately generated at the inner circumferential end M of the annular core 2 in accordance with the cycle of the alternating current, and the magnetic poles 7 are magnetized to constant magnetic poles by the permanent magnet 6. In between, attractive and repulsive forces occur. As a result, the oscillator 5 reciprocates in the axial direction and drives the diaphragm 13. When the diaphragm 13 is driven, the volume of the pump compression chamber 16 repeatedly increases and decreases, and the pressure change opens and closes the suction valve 18 and the discharge valve 19, and sucks fluid such as air or water from the suction port 21. The liquid is discharged from the discharge port 27.

In FIG. 2, the two permanent magnets 6 are mounted so as to face each other with their repulsive surfaces facing each other.
The pole piece 7a is magnetized to the N pole, the pole piece 7b is magnetized to the S pole, and the pole piece 7c is magnetized to the N pole. XX
The line is a center line that equally divides the electromagnetic coil 1 in line symmetry, and is also a center line that bisects the axial width W1 of the pole pieces 7a and 7c. The arrangement of the electromagnetic coil 1 and the pole pieces 7a and 7c is the same as that of the conventional vibration type pump shown in FIG. 6, and includes two magnetic poles generated at the inner peripheral end M of the annular core 2 and the outer circumferences of the pole pieces 7a and 7c. An attractive force and a repulsive force are generated in the axial direction between the magnetic pole N generated on the surface (see arrows,...).

In the vibration type pump of the present invention, in addition to the attractive force and the repulsive force (see the arrows, ...), the center line Y that bisects the axial width W4 of one magnetic pole M of the annular core 2 is used. -The distance W5 between Y and the pole pieces 7a, 7b
Further, an attractive force and a repulsive force are generated by a configuration in which the center line YY that divides (or the distance between the pole pieces 7b and 7c) into two is generated (see arrows). That is, a pole piece 7b sandwiched between two permanent magnets 6
Has an S pole, attracts the N pole of one electromagnetic coil 1 (see arrow), and repels the S pole of the other electromagnetic coil 1 (see arrow). These attractive and repulsive forces are 7a and 7b
It can also be adjusted by making the outer diameter of the different sizes.

As described above, in the vibration type pump of the present invention, the attractive force and the repulsive force are generated at six places in the axial direction only by connecting the two electromagnetic coils 1 in the axial direction. Has the same performance as the vibration type pump provided with three electromagnetic coils. This makes it possible to reduce the size and weight of the entire pump.

Next, another embodiment of the vibration pump according to the present invention, that is, a so-called active pump will be described with reference to FIG. The vibrating pump shown in FIG. 3 is configured symmetrically to the left and right, and unlike the vibrating pump 5 of the integral type of the vibrating pump shown in FIGS.
It is divided into two parts and is displaced symmetrically. As a result, the vibrations can be canceled out and the sound can be eliminated.

In FIG. 3, a substantially cylindrical electromagnetic coil 4 is provided.
Numeral 1 is disposed in a cylindrical frame 51, and two diaphragms 53 are sandwiched between casings 52 connected to both ends of the frame 51. A pump compression chamber 56 is formed in the casing 52, and sucks fluid from the suction port 57 by the vibration of the vibrator 45 and discharges the fluid from the discharge port 58. The oscillator 45 has a shaft 44 whose one end is swingably supported by a support body 49, a disk-shaped permanent magnet 46 supported at the center of the shaft 44, and a permanent magnet 46.
Pole pieces 47a, 47 provided in contact with both poles of the
The other end of the shaft 44 is connected to and supported by the diaphragm 53.

The permanent magnet 46 is magnetized so as to be polarized in the axial direction. In FIG. 3, the pole piece 47a, which is a magnetic material, is magnetized to the N pole and the pole piece 47b is magnetized to the S pole. The XX line is a center line that equally divides the electromagnetic coil 41 in line symmetry, and is also a center line that bisects the axial width of one pole piece 47b. by this,
An attractive force and a repulsive force are generated in the axial direction between the two magnetic poles generated on the inner peripheral end of the electromagnetic coil 41 and the magnetic pole S generated on the outer peripheral surface of the pole piece 47b (see arrows).

In the vibration pump of the present invention, in addition to the above-mentioned attractive force and repulsive force (see arrows), a center line Y-Y that divides the width of one magnetic pole of the electromagnetic coil 41 into two, and a pole piece 47a, Center line Y- which divides the distance between 47b into two
Further repulsion (or attraction) is generated by the configuration that matches Y (see arrow). That is, in the conventional configuration, attraction and repulsion that can be generated for one electromagnetic coil are at most two, but according to the present invention, it can be generated at three places. Therefore, the pump performance can be improved despite its smaller size than before. For example, since the magnetic flux of the mover (vibrator) can be designed larger than that of the conventional type with respect to the ampere-turn of the electromagnet, the number of turns of the coil can be reduced and the power factor can be improved. Therefore, the efficiency can be improved.

Next, still another embodiment of the vibration type pump of the present invention will be described with reference to FIG. The vibrating pump shown in FIG. 4 has a symmetric configuration of the vibrating pump shown in FIG.

In FIG. 4, a substantially cylindrical electromagnetic coil 6 is provided.
Numeral 1 is disposed in a frame 71, and two diaphragms 73 are held by connecting the frame 71 to both ends of a casing 72. A pump compression chamber 76 is formed in the casing 72, and sucks fluid from the suction port 77 by the vibration of the vibrator 65 and discharges the fluid from the discharge port 78. The vibrator 65 has one end swingably supported by a support 69, and has a disk-shaped permanent magnet 66 at its center and pole pieces 67a and 67b provided on both pole sides of the permanent magnet 66. It is connected to and supported by the diaphragm 73.

The permanent magnet 66 is magnetized so as to be polarized in the axial direction. In FIG. 4, the pole piece 67a, which is a magnetic material, is magnetized to the N pole and the pole piece 47b is magnetized to the S pole. The XX line is a center line that equally divides the electromagnetic coil 61 in line symmetry, and is also a center line that bisects the axial width of one pole piece 67a. by this,
An attractive force and a repulsive force are generated in the axial direction between the two magnetic poles generated on the inner peripheral end of the electromagnetic coil 61 and the magnetic pole N generated on the outer peripheral surface of the pole piece 67a (see arrows).

In the vibration type pump of the present invention, in addition to the above-mentioned attractive force and repulsive force (arrow, refer to), the center line YY that divides the width of one magnetic pole of the electromagnetic coil 61 into two, the pole piece 67a, Center line Y- that bisects the distance between 67b
Further attraction (or repulsion) is generated by the configuration that matches Y (see arrow). That is, in the conventional configuration, attraction and repulsion that can be generated for one electromagnetic coil are at most two, but according to the present invention, it can be generated at three places. Therefore, the pump performance can be improved despite the same size as the conventional one.

As can be seen from the embodiments of FIGS. 3 and 4, the vibration type pump according to the present invention has one electromagnet (electromagnetic coil) and one magnet mover (permanent magnet) in a ratio of 1: 1. Therefore, a pump composed of a single diaphragm and a pump section (for example, a pump composed only of the right half of FIG. 3 or FIG. 4) is also possible.

Further, the permanent magnet of the present invention is characterized in that it is polarized in the axial direction, and its shape can be cylindrical, annular, polygonal, etc. in addition to the disk shape.

[0048]

As described above, in the vibration type pump of the present invention, the center line and the axis of the pole piece for equally symmetrically dividing the electromagnetic coil for generating attraction and repulsion at the same place as in the prior art. It has a configuration to match the center line that divides the width in the direction into two. In addition, a configuration is adopted in which a center line that bisects the axial width of one magnetic pole of the annular core and a center line that divides the distance between the pole pieces into two coincide. Therefore, even if the types of parts are the same, it is possible to newly generate attractive force and repulsive force in a place that has not been present in the past, and it is possible to reduce the number of parts. For example, conventionally, three electromagnetic coils are connected in the axial direction to generate an attractive force and a repulsive force at six locations in the axial direction, whereas two electromagnetic coils generate the attractive force and the repulsive force at six locations in the axial direction. Can be caused. Therefore, the pump body can be reduced in size and weight without reducing the suction force and the discharge force of the pump itself, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view of an embodiment of a vibration pump according to the present invention.

FIG. 2 is an operation explanatory view of the pump shown in FIG.

FIG. 3 is a cross-sectional explanatory view of another embodiment of the vibration pump of the present invention.

FIG. 4 is an explanatory sectional view of still another embodiment of the vibration type pump of the present invention.

FIG. 5 is a structural explanatory diagram of a drive unit of a conventional vibration pump.

6 is an operation explanatory view of the vibration type pump shown in FIG. 5;

FIG. 7 is a cross-sectional explanatory view of a conventional vibration pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic coil 2 Annular core 2a, 2b Core member 5 Transducer 6 Permanent magnet 7, 7a, 7b, 7c Pole piece (pole piece) 13 Diaphragm 41 Electromagnetic coil 45 Transducer 46 Permanent magnet 47a, 47b Pole piece 57 Diaphragm 61 Electromagnetic coil 65 Vibrator 67a, 67b Pole piece (pole piece) 73 Diaphragm M One magnetic pole of the annular core W1 Axial width of the pole piece W4 Axial width of one magnetic pole of the annular core W5 Between the pole pieces distance

Claims (1)

[Claims] 1. An electromagnetic coil having a substantially cylindrical shape in which a coil is wound in a cylindrical shape in an annular core, an axially polarized permanent magnet disposed in the electromagnetic coil, and a permanent magnet. A pole piece provided on both pole faces of the magnet to be magnetized by the permanent magnet, supporting the permanent magnet and the pole piece,
A vibrating pump in which at least one end is provided with a vibrator connected to a diaphragm, and the diaphragm is driven by electromagnetic vibration of the vibrator based on a magnetic interaction between the electromagnetic coil and a permanent magnet, A center line that equally divides the electromagnetic coil in line symmetry and a center line that divides the axial width of the magnetic pole piece in half are matched with each other, and the axial width of one magnetic pole of the annular core is halved. A vibratory pump characterized in that a center line and a center line that divides the distance between the pole pieces into two are matched.