KR930005875Y1 - Electronic pump - Google Patents

Abstract

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Description

Electronic diaphragm pump

1 is a cross-sectional view of an embodiment of the present invention from the front.

2 is a plan view of the embodiment.

3 is a left side view of the embodiment, and FIG. 2 is a view taken along the line Y-Y.

4 is a front view of the power disconnect switch shown in FIG.

5 is the same right side view.

6 is the same rear view.

FIG. 7 is a diagram showing an operating state of the power disconnect switch shown in FIG.

8 is a front view showing another example of a power disconnect switch.

9 is a front view showing still another example of a power interruption switch.

FIG. 10 is a plan view of the embodiment shown in FIG.

11 is a cross-sectional view of a conventional electronic diaphragm pump viewed from the front direction.

12 is a plan view of a conventional electronic diaphragm pump.

FIG. 13 is a left side view of a conventional electronic diaphragm pump, and FIG. 12 is a view cut along X-rays of FIG.

14 is a schematic plan view showing the principle of operation of the electronic diaphragm pump.

Fig. 15 is a sectional view of another example of a conventional electronic diaphragm pump seen from the front direction.

* Explanation of symbols for main parts of the drawings

3: head carver 4: diaphragm

3A: Diaphragm Room 8: Magnet

9: field core 11: coil

14: intake valve 15: discharge valve

160: magnet holder 160A: top portion

410, 510, 610: power disconnect switch 411, 611: board

412, 512, 612: Lever 412A: Tofu

412B: Operation stage 412C: Intake

412D: recess 413: rivet

414, 514, 614: Contact terminal 414B, 514B, 614B: Contact part

512D, 612D: Convex

The present invention relates to an electronic diaphragm pump, and more particularly, to an electronic diaphragm pump provided with a means for detecting the abnormality and disconnecting the power supply when an abnormality occurs in the movement of the vibrator due to a diaphragm breakage or the like.

A conventional electronic diaphragm pump will be described below using FIGS. 11 to 13.

FIG. 11 is a cross-sectional view of a conventional electronic diaphragm pump viewed from the front, and FIG. 12 is a plan view showing a portion of a conventional electronic diaphragm pump, and FIG. 13 is a diagram illustrating a conventional electronic diaphragm pump cut along a line XX of FIG. It is a figure and the pump part shown on the right side of the figure is shown.

In each figure, the housing | casing 1 is shape | molded by the press work of a metal plate, and the circular hole 1B is provided in 1 side plate 1A bent so that it may mutually be opposed.

The diaphragm plate 2 is fitted into the circular hole 1B, and the diaphragm 4 formed of an elastic material such as rubber is supported by the diaphragm plate 2 and the head cover 3. They are mounted to the side plate 1A of the housing 1 using male screws 18.

One plate magnet 8 is supported by a magnet holder 6 formed of a material such as aluminium. The diaphragm 4 is provided at both ends of the magnet holder 6 using the restraint 5 and the male screw 7. The magnet holder 6 and the magnet 8 constitute a vibrator of the electronic diaphragm pump.

3A of diaphragm chambers are formed in the said head carver 3, as shown in FIG. In the diaphragm chamber 3A, a discharge port 15A and a discharge valve 15 are formed in parallel with the suction port 14A and the suction valve 14, and are provided.

The field core 9 is a layered iron core in which a silicon steel sheet molded in an E shape is laminated. As shown in the drawing, the wound coil 11 is inserted into the bobbin 10 at its center angle.

The electronic diaphragm pump is provided with two of these field cores 9, which are fixed to the bottom of the housing 1 so as to sandwich the magnet holder 6. This fixing was performed using the male screw 12 and the female screw 13, but since the field core 9 needs to be separated by a predetermined distance from the bottom of the housing 1, as shown in FIG. The sleeve 16 is inserted.

This electronic diaphragm pump is installed in the fluid tank 20 (see FIG. 11) via the anti-vibration rubber 19, for example. Then, a fluid such as air is discharged from the tube 17 connected to the head cover 9 to the tank 20.

FIG. 14 is a plan view showing the operating principle of the electronic diaphragm pump in a plan view, and shows the same or equivalent parts as in FIGS. 11 to 13.

As shown in FIG. 14, one magnet 8 mounted to the magnet holder 6 is arranged so that the magnetic poles of the adjacent magnets 8 are reversed with each other as shown.

Therefore, when the AC power source is connected to the coil 11 so that magnetic flux passes from one field core 9 to the other field core 9 (arrows P and Q directions), the magnet holder 6 moves in the direction of the arrow R. The reciprocating motion causes the diaphragm 4 to vibrate.

As a result, as shown in FIG. 12, through the side plate 1A of the housing 1, the diaphragm plate 2, and the head cover 3, the opening 1D, the inlet port 14A, and the inlet valve 14 pass through. Thus, the fluid is sucked into the diaphragm chamber 3A in the direction of the suction arrow A, and the fluid passes through the discharge port 15A and the discharge valve 15 (in the direction of the arrow B), and the fluid in the tube 17 as shown in FIG. It discharges to the tank 20 (arrow C direction).

The diaphragm 4 is molded by an elastic member such as rubber. By vibrating at the same frequency as the frequency of the AC power source connected to the coil 11, if the electronic diaphragm pump is used for a long time, the diaphragm 4 may be damaged.

When the diaphragm 4 is broken, not only the compression supply of the fluid can be performed, but also the magnet 8 comes into contact with the field core 9 and the magnet 8 breaks or makes a noise. It is necessary to stop the energization to (11).

Techniques for this purpose are described in Japanese Patent Application Laid-Open Nos. 61-252881, 63-6389, and 61-137892.

In the techniques described in these publications, the centers of the reciprocating motions of the saw portion by the reciprocation of the vibrator are mounted using different ones before and after the diaphragm breakage.

That is, in Japanese Patent Application Laid-Open No. 61-252881, one saw portion (projection portion) is provided in the magnet holder supporting the mark net at a predetermined interval, and the switch connecting the coil and the power source is turned on near the saw portion. The structured rod-shaped body is arrange | positioned, and the rod-shaped body is broken by the said top part, and is broken, and the circuit interruption at the time of abnormality is performed.

In Unexamined-Japanese-Patent No. 63-100682, the printed circuit board part which connects a coil and a power supply is arrange | positioned in the vicinity of the said top part, and the printed board piece is damaged by the said top part, and the circuit interruption at the time of abnormality is performed.

In Japanese Patent Application Laid-Open No. 61-137892, a snap switch for opening and closing a connection between a coil and a power source is disposed above the top portion, and the toggle of the snap switch is biased by the top portion to cut off the circuit in an abnormal state.

By the way, each said prior art has the following problems.

(1) In the technique described in Japanese Patent Application Laid-Open No. 61-252882, the rod-shaped body configured to turn on the switch connecting the coil and the power supply has a certain degree of rigidity, so that the diaphragm breaks to a certain degree, and the If the displacement of the center of gravity is not large, the breakage of the diaphragm cannot be detected, and since the abnormality can be detected at the time when the rod body itself is broken, it is necessary to replace the rod body in accordance with the diaphragm replacement repair.

(2) Next, in the technique described in Japanese Patent Application Laid-Open No. 63-100682, the printed circuit board piece has a certain degree of rigidity. As in the case of (1) above, if the diaphragm break does not progress to some extent, the printed board piece will not be damaged. Do not. The sound of blow from the top portion until the printed board piece is broken is relatively loud. Therefore, similarly to the above (1), it is also necessary to replace the printed circuit board fitting in accordance with the diaphragm replacement and repair.

(3) Although the technique described in Japanese Patent Application Laid-Open No. 61-137892 performs a circuit break using a snap switch, a relatively large stroke and force are required to operate the toggle of the snap switch. Therefore, even if the diaphragm is broken, it is often impossible to operate the snap switch, which is not practical.

Even if the snap switch is operated, it is not possible to arrange the snap switch so that the toggle faces downward since the toggle must be restored after the diaphragm is replaced. As a result, it is inevitably necessary to arrange the toggle in the transverse direction, and the top portion provided in the magnet holder for operating the snap switch must be lengthened. For this reason, the weight of the magnet holder becomes large.

In addition, since the center of the vibrator moves relatively largely from the center of the vibrator in the direction (upward) of the saw, the balance becomes poor during the reciprocating motion of the vibrator. As a result, the efficiency of the electronic diaphragm is reduced.

In order to eliminate this drawback, the Applicant consists of a real element 63-161888, a power cut-off switch consisting of a substrate having an electrical contact and a lever operated by the saw portion, and the lever between the operating end and the electrical contact. As a point, it is proposed to devise a device to be rotated on the substrate.

FIG. 15 is a sectional view of the electronic diaphragm pump described in the above specification and drawings, and is the same as FIG. In Fig. 15, the same reference numerals as in Figs. 11 to 14 indicate the same or equivalent parts.

In Fig. 15, reference numeral 160 denotes a magnet holder 160A and one saw portion formed in the magnet holder 160.

The power cutoff switch 210 is provided on the top portion 160A by using a male screw 220. The power cutoff switch 210 is composed of a substrate 211 and a lever 212 operated by the saw portion 160A.

The lever 212 is provided on the substrate 211 by a rivet 213 so that the lever 212 and one electrical contact (not shown) formed on the substrate 211 face each other. In addition, this apparatus connects AC power to the driving coil of the electromagnet diaphragm pump and, in the case of reciprocating the magnet holder 160, the friction force such that the lever 212 does not move even if vibration occurs in the pump. This is done as occurs between the lever 212 and the lever 211. In other words, the device is applied such that the lever 212 rotates the rivet 213 as a point by applying a predetermined force to the operating stage 212B so that the contact of the one electrical contact is lost.

According to this configuration, it is not necessary to replace the switch after the operation of the power cutoff switch, and it is possible to shorten the top portion 160A for one switch operation formed on the magnet holder 160, thereby balancing the reciprocating motion of the vibrator. It is possible to do so. As a result, the efficiency of the electronic diaphragm pump is improved.

The weight of the magnet holder 160 of the electronic diaphragm pump is reduced.

As described above, the diaphragm 4 formed by an elastic member such as rubber may be broken with respect to the use of the electronic diaphragm pump, and the center position to the vibration of the magnet holder 160 is shifted by the breakage. The power cutoff switch 210 operates.

By the way, since the said diaphragm 4 is broken gradually, it shifts to the vibration center position of the magnet holder 160 by the damage gradually. Therefore, the lever 212 rotates gradually with the rivet 213 as a point, and the contact part with respect to the said one electrical contact also shifts gradually.

As a result, the contact area between the one electrical contact gradually decreases, and the electrical resistance gradually increases.

Therefore, when the electronic diaphragm pump is enlarged and a large current flows through the driving coil, when the diaphragm 4 starts to break, the contact is heated in accordance with the increase in the contact resistance until the contact is completely detached. Not.

The device of the lever 212 to the substrate 211 is performed so that a predetermined frictional force is generated between the lever 212 and the substrate 211. However, this frictional force is generated by the device of the rivet 213. The setting of the frictional force, in other words, cannot set the force required for the operation of the lever 212 accurately. Moreover, when mass-producing a power cut off switch, it is difficult to set the said force uniformly.

The present invention has been made to solve the above-mentioned problems, and the object thereof is that the replacement of the parts cannot be carried out, the balance in the reciprocating motion of the vibrator is not bad, and the diaphragm breaks to some extent, It is an object of the present invention to provide an electronic diaphragm pump having a power cut-off switch in which electrical resistance does not increase in the electrical contact until the electrical contact is completely deviated.

Another object of the present invention is to provide an electronic diaphragm pump having a power cutoff switch capable of accurately setting a force required for an operation of an operation lever of a power cutoff switch.

In order to solve the above problems, the present invention has an operating end at one end thereof, a lever formed at one end of the concave portion and a convex portion, and one side of the convex portion and the concave portion to be engaged at the other end of the lever, and the lever The switch is constituted by a contact block on a spring that presses the pressure switch, and the lever is formed of a rotational material around the point, and the point of the lever and the contact terminal is in the engaged state. It is characterized by the point that the center is positioned above it.

The engagement of the lever and the contact terminal is carried out by the concave-convex engaging portion formed in the lever and the contact terminal and the lever is pressed by the spring-like contact terminal at the time of engagement, so that the lever is operated by the saw portion formed on the vibrator. However, even when the contact force is small, even if the engagement state is slightly displaced between the lever and the contact terminal, the lever returns to the original engagement state by the spring force of the contact terminal. Therefore, the contact area of the engagement portion, that is, the electrical contact portion of the power cut-off switch, is not kept small.

When the contact force with respect to the said operation stage becomes more than a predetermined magnitude | size, the said engagement will be out, and then the said lever will rotate by its own weight, and the OFF operation of the said power cut-off switch is performed reliably.

The present invention is also characterized in that the single column on the spring-like contact terminal side of the lever is formed on a single weight. As a result, the center of the lever is separated from the point, so that the lever rotation after the engagement of the electrical contact portion of the power disconnect switch is agile and securely performed.

The present invention is also characterized in that water intake is formed at the end of the lever on the spring contact terminal side. The water intake is used to engage the lever and the contact terminal, and the engagement can be easily performed.

In the following, the present invention will be described in detail with reference to the drawings.

1 is a cross-sectional view of an embodiment of the present invention from the front, FIG. 2 is a plan view of an embodiment of the present invention, and FIG. 3 is a left side view of the embodiment shown by cutting on the line Y-Y of FIG. In FIG. 1 thru | or FIG. 3, the part shown in FIG. 11 thru | or 15 and the part which shows the same or equivalent part are attached | subjected with the same code | symbol, and detailed description is abbreviate | omitted.

1 to 3, the magnet holder 160 and one magnet 8 constitute a vibrator of the electronic diaphragm pump.

Reference numeral 100 denotes a housing, a molded article made of resin, or a cast article made of metal such as aluminum.

On the bottom face of the housing 100, device portions 100A, 100B for positioning and fixing two field cores 9 are formed. Female screws 100C are embedded in the device portions 100A, 100B as shown in FIG. Of course, as long as the material forming the housing 100 has sufficient strength, a female screw may be formed directly on the device portions 100A and 100B.

Although not shown, by increasing the strength, the housing 100 may be reinforced with ribs as necessary.

The field cores 9 provided with the coils 11 are arranged and positioned in the device portions 100A and 100B of the housing 100 configured as described above, and the male screw 120 is embedded in the device portions 100A and 100B. The field core 9 is fixed to the female screw 100C, and the device portions 100A and 100B are fixed thereto.

When the housing 100 is molded by resin etc., the male screw 120 which fixes the field core 9 which opposes each other is inserted into the reinforcement member 200 here. At this time, the sleeve 200A is disposed between the reinforcing member 200 and the field core 9 so that the reinforcing member 200 does not contact the magnet holder 160. By installing the reinforcing member 200, even if a strong magnetic force is moved between the opposing field core (9) there is no fear that the housing 100 is bent or the upper portion of the field core (9) approaches.

By the way, two top parts 160A are formed in the magnet holder 160 so that the upper surface may have a predetermined space | interval.

Of the two bobbins in which the coil 11 is recommended, a protrusion 10B is formed at an upper center portion of one bobbin 10A on the side opposite to the other bobbin 10, and the power source 10B is provided with a power source. A disconnect switch 410 is provided by the male screw 220.

Next, the power cutoff switch 410 will be described with reference to FIGS. 4 to 6.

4 is a front view of the power cutoff switch 410, and FIG. 5 is a right side view of the power cutoff switch 410. 6 is a rear view of the power cutoff switch 410.

4 to 6, the power cutoff switch 410 includes a substrate 411 provided with a device hole 411B for installing the power cutoff switch 410 on the protrusion 10B of the bobbin 10A. And a lever 412 operated by the saw portion 160A (see FIG. 1) formed in the magnet holder 160, and a contact terminal 414 engaged with the lever 412. The substrate 411 is made of, for example, a resin plate, and the lever 412 is made of a conductive material, for example, the stretching terminal. It is formed by stretched copper.

As shown in FIG. 6, conductive patterns 421 and 422 are formed on one side of the substrate 411. A portion of the substrate 411 corresponding to one end of the print pattern 421 is provided with a lever 412 via a rivet 413 formed of a conductive material, and a portion of the substrate 411 includes a lead wire. Lead holes 411C for drilling are laid. The hole (not shown) for inserting the rivet 413 formed in the lever 412 is set slightly larger than the outer diameter of the lever 412, and the device of the lever 412 by the rivet 413 In order to have some shape between the lever 412 and the rivet 413, in other words, when the lever 412 is not press-fitted by the contact terminal 414, the lever 412 moves the rivet 413. It is performed to rotate freely as a point.

As shown in FIG. 4, the lever 412 has a head 412A having a larger diameter and a single weight at one end thereof, and is described in detail between the head 412A and the other end (operating end 412B). A ball for inserting one rivet 413 is formed. Since the ball is formed in the operating end 412B, the center of the lever 412 is located on the head 412A side of the ball.

A concave portion 412D is formed at the tip of the head 412A, and a water intake 412C is provided at a substantially central portion of the head 412A.

In addition, the part shown by the hatching of the print pattern 421 is a part in which the resin film for insulation was given to the surface.

One terminal device hole 411D is laid in a portion of the substrate 411 in which the print turn 422 is formed. The terminal device part 414D formed in the contact terminal 414 is inserted in this terminal device hole 411D, and is soldered. As shown in FIG. 4, the contact terminal 414 has a curved portion 414A, and the contact portion 414B having a concave shape is formed at the leading end of the curved portion 414A to have substantially the same shape as the recessed portion 412D. Is formed. Therefore, when the recessed portion 412D and the contact portion 414B are engaged, both of them come into contact with each other in a plane.

In the power cutoff switch 410 having the above configuration, the head 412A of the lever 412 is moved to the contact terminal 414 side, and the recess 412D is engaged with the contact portion 414B of the contact terminal 414. By doing so, the lever 412 is pressed in the direction of arrow D by the spring force of the contact terminal 414, and is fixed. As described above, the device of the lever 412 is made to have some shape between the lever 412 and the rivet 413, and the electrical contact is not good, but the contact terminal 414 of the lever 412 By the pressing force in the direction of the arrow D by the spring force, the electrical contact state is improved.

This power shield switch 410 is electrically connected between one coil 11 connected in parallel and an alternating current power supply (not shown). That is, one end of one coil 11 connected in parallel to the lead hole 411C, for example, at the side where the lever 412 is arranged is inserted, and one end thereof is attached to the frit pattern 421. When the portion 414D is inserted into the terminal device hole 411D and attached to the print pattern 422, a lead wire to be connected to one end of the one coil 11 is attached (see numeral 300 in FIG. 1). .

The power cutoff switch 410 is mounted by screwing the male screw 220 through the device hole 411B and being screwed into a female screw (not shown) formed in the protrusion 10B of the bobbin 10A. The apparatus includes two top portions formed so as to have a predetermined distance on the upper surface of the magnet holder 160 in a state where the recess 412D is engaged with the contact portion 414B (that is, the power cutoff switch 210 is turned ON). In the center of 160A, the operation stage 412B is located (see FIG. 1).

When the power cutoff switch 410 is ON, energization is performed to the coil 11, and the magnet holder 160 reciprocates at a predetermined frequency. Then, the diaphragm 4 reciprocates and the fluid is discharged.

When no damage or the like occurs in the diaphragm 4, since the vibration center of one saw portion 160A is at the position of the operating end 412B of the power cut-off switch 410, even if the saw portion 160A vibrates, The saw portion 160A does not abut the operating end 412B.

If a crack or the like occurs in the diaphragm 4, the vibration of the magnet holder 160 is inclined toward one diaphragm 4, or the amplitude of the vibration is increased, and the vibration center of one top portion 160A is departed, and One of the saw portions 160A abuts the operating end 412B.

Here, when the diaphragm 4 breaks down, the center position of the vibration of the magnet holder 160 due to the breakage gradually shifts.

Therefore, one of the top portions 160A formed in the magnet holder 160 abuts against the operating end 412B of the lever 412 little by little (for example, in the direction of arrow E in FIG. 4). The contact force (collision force) at this time becomes large as breakage of the diaphragm 4 advances.

However, the recessed portion 412D and the contact portion 414B are engaged, and the recessed portion 412D has its point direction (the direction of the rivet 412, that is, the arrow of FIG. 4) by the spring force of the contact terminal 414. D direction], when the contact force with respect to the operating end 412B of the saw portion 160A is small, even if the top portion 160A collides with the operating end 412B and the position of the lever 412 is slightly shifted, The lever 412 returns to its original state. Therefore, the contact area between the recessed portion 412D and the contact portion 414B is not kept small.

When the contact force with respect to the operating end 412B of the saw part 160A becomes more than a predetermined force, the engagement of the recessed part 412D and the contact part 414B will be out (refer FIG. 7). Here, the device of the lever 412 by the rivet 413 is made so that the lever 412 can rotate freely without resistance, and the center of the lever 412 is the head 412A side at the point of rotation. Therefore, after the engagement of the recessed portion 412D and the contact portion 414B is released, the lever 412 is rotated in place by its own weight (arrow F direction in FIG. 7). At the time of the rotation, the male screw 220 functions as a stopper of the lever 412. That is, the rotation of the lever 412 stops by abutting the male screw 220. As a result, the power cutoff switch 410 is surely turned off, and the energization to the coil 11 is released.

After the diaphragm 4 is replaced, the lever 412 is moved to reengage the chamfer portion 412D and the contact portion 414B again, so that the power cutoff switch 410 is turned on, and the electronic diaphragm pump can be operated.

In addition, the rejoining of the recess 412D and the contact 414B (recovery of the power cutoff switch 410) can be easily performed by using the water intake 412C.

FIG. 8 is a front view showing another example of a power cut-off switch, and in FIG. 8, the same reference numerals as those in FIGS. 4 to 7 indicate the same or equivalent parts.

In the power cut-off switch 410 shown in FIG. 4, a recess 412D is formed in the lever 412, and a convex portion (contact portion 414B) substantially the same as the shape of the recess 412D is provided in the contact terminal 414. FIG. Although formed, the above-mentioned uneven | corrugated relationship is reversed in the power cut off switch 510 shown in FIG. That is, a convex portion 512D is formed in the head 412A formed at one end of the lever 512, and a concave portion (contact portion 514B) substantially the same as the shape of the convex portion 512D is provided in the contact terminal 514. Formed.

Also in this power cut-off switch 510, when the convex part 512D and the contact part 514B are engaged, the lever 512 is pressed by the spring force of the contact terminal 514 in the arrow D direction. As a result, similarly to the power-off switch 410, when the contact force with respect to the operation end 412B is small, the top part 160A collides with the operation end 412B, and the position of the lever 512 is shifted slightly, and the lever ( 512 returns to its original state. Therefore, the contact area of the recessed part 512D and the contact part 514B is not kept small. If the contact force with respect to the operating end 412B becomes more than a predetermined force, the engagement of the convex portion 512D and the contact portion 514B is released, and the lever 512 then rotates in place by its own weight, The power cutoff switch 510 is surely turned off.

9 is a front view showing still another example of the power cut-off switch, and FIG. 10 is a front view of the embodiment. In FIG. 9 and FIG. 10, the same code | symbol as FIG. 4 thru | or 8 has shown the same or equivalent part.

9 and 10, the convex portion 612D is provided on the side surface of the substrate 611 in the lever 612 provided on the substrate 611 by the rotating material by the rivet 413. As shown in FIG. This lever 612 and the recessed portion 612D are also made of conductive material.

The contact terminal 614 is provided on the surface of the substrate 611 opposite to the surface on which the lever 612 is provided. The contact terminal 614 is formed of a conductive spring material, and a portion facing the convex portion 612D has a concave shape substantially the same as the convex shape of the convex portion 612D, as shown. 614B is formed.

In the power cut-off switch 610 having the above configuration, when the convex portion 612D is engaged with the contact portion 614B, the portion where the convex portion 612D of the lever 612 is provided by the spring force of the contact terminal 614 is formed. It is pressed by the direction falling from the board | substrate 611. FIG. As a result, similar to the power cut off switch 410, 510, when the contact force with respect to the operation end 412B is small, even if the top part 160A collides with the operation end 412B, and the position of the lever 612 shifts slightly, 612 returns to its original state. Therefore, the contact area of the convex part 612D and the contact part 614B is not kept small.

When the contact force with respect to the operation | movement end 412B becomes more than predetermined force, the engagement of the convex part 612D and the contact part 614B will be out, and then the lever 612 will rotate in place by its own weight, and the said power supply will The disconnect switch 610 is surely turned off.

Re-engagement of the convex portion 612D and the contact portion 614B can be easily performed using the water intake 412C.

In addition, in this power cut-off switch 610, the lever part 612A is not formed in the contact side part of the lever 612 (the head 412A in FIG. 4 and FIG. 8), but the lever 612 by the rivet 413. ) And the position of the device of the rivet 413 of the lever 612 to be out of the center thereof, the engagement between the convex portion 612D and the contact portion 644B is dropped, The lever 612 rotates in that position, and the switch is turned OFF.

In the power cut-off switches 410 and 510, the head may not be particularly formed at one end of the lever.

As can be seen from the above description, according to the present invention, the following effects are achieved.

(1) According to the electronic diaphragm pump according to claim 1, the OFF operation of the power switch is completed only when the contact force with respect to the operating end of the power disconnect switch is equal to or greater than a predetermined force, and the contact force is predetermined. If the power is not satisfied, the contact area of the electrical contact of the power cut-off switch is not kept small.

Therefore, when the diaphragm is not damaged much, there is no fear that the power disconnect switch is heated.

Since the force required for the operation of the power cut-off switch is determined only by the spring force of the contact terminal engaged with the operation lever, it is possible to accurately set the force by uniformly manufacturing the contact terminal.

(2) According to the electronic diaphragm pump according to claim 2, the rotation of the lever constituting the one end side of the contact portion after the engagement of the electrical contact portion of the power cutoff switch is performed more quickly and reliably, thus the power switch Can be surely performed.

(3) According to the electronic diaphragm pump of Claim 3, since the said water intake is attached to the said lever, re-engagement after engagement of the electrical contact part of a power interruption switch can be performed easily.

Claims (3)

One diaphragm arranged to face each other, a diaphragm chamber occluded by the diaphragm and having an intake valve and a discharge valve, and one top portion connected to each diaphragm and spaced at a predetermined interval in the arrangement direction of the one diaphragm. And a vibrator having one magnet, one field core in which coils are wound around each other and the magnetic poles are arranged so as to oppose the one magnet, and between the coil and the power supply electrical circuit and between the one top portion. A power cut-off switch arranged so that its operating end is arranged, said power cut-off switch having said operating end at one end thereof, a lever formed at one end thereof with a concave portion and a convex portion, and a convex to be engaged at the other end of the lever; One side of the recess and the recess is formed and consists of a spring-like contact terminal for pressing the lever And the lever is made of a rotational material about a point, wherein the point is set such that the center of the lever is positioned above the lever and the contact terminal in an engaged state. The electronic diaphragm pump according to claim 1, wherein the other end of the lever is formed with a single weight. The electronic diaphragm pump according to claim 1 or 2, wherein water intake is formed at the other end of the lever.