JPH0519592Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to electromagnetic blowers that supply air to septic tanks, live fish tanks, etc. The present invention relates to an electromagnetic blower that is provided with an energization cutoff means for stopping the supply of power and stopping the operation of the vibrator frame when such a situation occurs.

(Prior Art) Conventionally, as shown in FIGS. 6 and 7, an electromagnetic blower 1 has diaphragm chambers 1L and 1R having pump functions formed in symmetrical positions, and the diaphragm in each chamber is connected to a vibrator frame 2. and is connected to the center disk CD at both ends.
Permanent magnets 2L and 2R are attached to the vibrator frame 2 at two locations, and electromagnets 3A and 3B are provided on both sides of the vibrator frame 2, facing the permanent magnets 2L and 2R, for absorbing or repelling the permanent magnets 2L and 2R. is provided. The electromagnets 3A and 3B each have a coil C2 wound around a core C1, and a coil C2 wound around a core C1.
For example, when 100V AC power is supplied from a commercial power supply to 2, the vibrator frame 2 is caused to , a pump 4 that is reciprocated left and right at a speed corresponding to the frequency of the commercial power supply and is connected to the diaphragm chambers 1L and 1R by pushing and pulling a diaphragm coupled to the vibrator frame 2.
External air is taken into L and 4R through the air filter 5, and the air is force-fed to the air tank 7 through the air tubes 6L and 6R.
Air is discharged from a discharge port 8 connected to a septic tank, a water tank, etc.

During the operation of the electromagnetic blower 1, the connection between the center disk CD attached to the end of the vibrator frame 2 and the diaphragm becomes disconnected over time or suddenly, for example, on the diaphragm chamber 1L side due to breakage of the connection. At this time, the center position of the left and right reciprocating motion of the vibrator frame 2 deviates, and the electromagnets 3A and 3
Permanent magnet 2 attached to magnetic pole B and vibrator frame 2
Because the magnetic attraction and repulsion between the L and 2R magnetic poles become unbalanced, when the vibrator frame 2 reciprocates left and right, it is not parallel to the magnetic pole surfaces of the electromagnets 3A and 3B, but at a certain angle. and exercise,
Its motion amplitude becomes wider. Therefore, permanent magnet 2
L or 2R and the magnetic pole surface of the electromagnet 3A or 3B come into contact and the permanent magnet 2L or 2R turns into powder and scatters, so the inside of the electromagnetic blower 1 becomes dirty to the point that it cannot be cleaned, and if the same condition continues, the bonded state will occur. The diaphragm part on the side was destroyed,
In addition, the transducer frame 2 may break or the pumps 4L and 4R may break.
In some cases, the parts and the electromagnets 3A and 3B were destroyed.

Conventionally, when the connection between the end face part of the vibrator frame 2 and the diaphragm part becomes incomplete, the electromagnet is energized immediately when the eccentric reciprocating movement occurs due to a change in the center position of the reciprocating movement of the vibrator frame 2. In order to stop the vibration, a printed circuit board piece is electrically connected between the power source and the electromagnet to form an energizing pattern for passing current from the power source, and a printed circuit board piece is attached to the vibrator frame to cause the eccentric reciprocating motion. An electromagnetic blower is used which is equipped with a current cutoff means including a striker that sometimes comes into contact with the printed circuit board piece and breaks the printed circuit board piece.

The above-mentioned conventional electromagnetic blower current cutoff means is the eighth
As shown in the figure, a pedestal 31 made of an insulating resin material is attached to the upper surface of the core C1 of the electromagnet 3B with a core bolt 32 and a nut 33, and two printed circuit board pieces 34 are attached to the upper surface of the pedestal 31. It is fixed using screws 35 and 36. The printed circuit board piece 34 has an energizing pattern (hatched area) formed on the front and bottom surfaces, and the energizing pattern 3 on the front surface
4B and an electrically conductive pattern (not shown) on the bottom surface are electrically connected through a small diameter through hole 34E formed at the tip of a breaking notch 34D formed in the resin plate.

On the other hand, strikers 40L and 40R are attached to the upper end surface of the vibrator frame 2 at symmetrical positions with the tip of the printed circuit board piece 34 as the center. These strikers 40L or 40R perform the eccentric reciprocating motion when the connection between the center disk CD attached to the end face of the vibrator frame 2 and the diaphragm becomes incomplete or broken during operation of the electromagnetic blower 1. When this occurs, it hits the tip of the printed circuit board piece 34 and breaks the breaking notch 34D of the printed circuit board piece 34. The structure is such that when the breaking notch 34D of the printed circuit board piece 34 is broken by the striker 40L or 40R, the current supply to the coil C2 is cut off.

(Problems to be Solved by the Invention) According to the above-mentioned conventional electromagnetic blower, when the eccentric reciprocating motion occurs, the time required for the breaking notch 34D of the printed circuit board piece 34 to break is due to the eccentric reciprocating motion. There is a problem that it is difficult to quickly cut off the current because it depends on the amount of displacement, and if the printed circuit board piece 34 is broken, it is necessary to remove the broken printed circuit board piece 3 in order to restore the electromagnetic blower.
4 has to be removed and a new printed circuit board piece installed, which requires a lot of time and effort to replace, and there is also the problem of having to have spare parts for the printed circuit board piece.

Therefore, in the present invention, the energization cutoff means is activated promptly at the initial stage when the eccentric reciprocating movement occurs, and the energization cutoff means is constructed with a non-destructive means, thereby saving the trouble of replacement and spare parts. The technical problem to be solved is to eliminate the hassle of having parts.

(Means for solving the problem) A technical means for solving the above problem is to provide a vibrator frame whose both ends are connected to each diaphragm part of a diaphragm chamber provided at a symmetrical position. An electromagnet is provided that causes the vibrator frame to reciprocate by magnetic attraction and repulsion with a permanent magnet attached to the vibrator frame, and one end of the vibrator frame and the diaphragm portion are incompletely connected. In the electromagnetic blower, the electromagnetic blower is provided with an energization cutoff means for cutting off current from a power supply to the electromagnet when eccentric reciprocating motion occurs due to a change in the center position of the reciprocating motion of the vibrator frame when the vibrator frame is in a state such as a microswitch electrically connected between the power source and the electromagnet; two convex strikers fixed at symmetrical positions with respect to the center position of the reciprocating motion of the vibrator frame; 2 above when the eccentric reciprocating movement occurs in the child frame
an arm that rotates to amplify the displacement when one end comes into contact with one of the two strikers due to displacement of the two strikers, and an arm whose opposite end turns off the micro switch. It is to do so.

(Function) According to the electromagnetic blower having the above configuration, when the connection between one end of the vibrator frame and the diaphragm section is incomplete and eccentric reciprocating motion occurs, there is no electrical connection between the power source and the electromagnet. The micro switch connected to the oscillator frame is turned off by the arm that has a displacement amplification effect, and the power supply to the electromagnet is cut off. The reciprocating motion is stopped, and the members constituting the energization cutoff means, such as the microswitch, the arm, and the striker, are maintained in a non-destructive state even when the energization is cut off.

(Example) Next, an example of the present invention will be described with reference to FIGS. 1 to 4. Note that expressions indicating directions such as left, right, top, and bottom in the explanatory text indicate directions in the drawings.

As shown in FIGS. 1 and 2, the electromagnetic blower 1 has diaphragm chambers 1L and 1R having pump functions formed in symmetrical positions, and the diaphragm in each chamber is connected to the vibrator frame 2 and a center disk at both ends thereof. Combined with CD. Permanent magnets 2L and 2R are attached to the vibrator frame 2,
Permanent magnets 2L and 2R on both sides of the top and bottom of the vibrator frame 2
Electromagnets 3A and 3B are provided opposite to and for attracting or repelling the permanent magnets 2L and 2R. Electromagnets 3A and 3B each have a core C
A coil C2 is wound around the permanent magnet 2L and 2, which is excited by the excitation power supplied from an external commercial power supply, and the permanent magnets 2L and 2 are magnetized in accordance with the frequency of the commercial power supply.
The magnetic pole face facing R is configured to be alternately excited to N pole and S pole.

The electromagnets 3A and 3B are attached to the upper surface of the core frame 11 formed in a concave shape from a steel plate or the like,
On the other hand, the diaphragm chamber 1L and the pump 4L are integrally attached to the left outer surface of the core mount 11, and the diaphragm chamber 1R and the pump 4R are integrally attached to the right outer surface of the core mount 11. There is. An air tube 6L is connected to the pump 4L, while an air tube 6R is connected to the pump 4R, and opposite ends of the air tubes 6L and 6R are respectively connected to an air tank (not shown). In addition, the same air tank is the same as pump 4 above.
It is provided to supply the pressurized air pumped from L and 4R to an external septic tank, live fish tank, etc.

As shown in FIGS. 3 and 4, transducer strikers 12L and 12 are provided on the lower end surface of the transducer frame 2 at positions symmetrical to the center point of the reciprocating motion of the transducer frame 2.
R is installed. On the other hand, an arm 15 is provided on the bottom surface of the core mount 11 and is supported by machine screws 13 and a plate-shaped holder 14 so as to be horizontally rotatable. As shown in FIG. 3, one end of the arm 15 is bent upward, and then the tip 15A is bent horizontally.
5A is usually the vibrator striker 12R and 1
It is located between 2L. When the transducer frame 2 makes the above-mentioned eccentric reciprocating motion due to breakage of the joint, etc., the transducer striker 12R or 12L is deviated from its normal position, so that the end face of the transducer striker 12R or 12L is displaced from its normal position. and the end surface of the distal end portion 15A of the arm 15 come into contact with each other, and the arm 15 is rotated around the machine screw 13.

In the arm 15, from the machine screw 13 to the tip 1
From the distance from the machine screw 13 to the tip 15
By increasing the distance from the end opposite to A to the working end 15B, the horizontal rotation of the working end 15B is greater than the distance by which the tip 15A horizontally rotates due to contact with the vibrator striker 12R or 12L. Since the distance can be amplified, the arm 15 detects the eccentric reciprocating motion and also amplifies the deviation in the eccentric reciprocating motion.

When the arm 15 is horizontally rotated and the operating end 15B is horizontally rotated, the micro switch 16 operated by the operating end 15B is activated by the core mount 11.
When the operating piece 16A of the micro switch 16 is released from the pressed state by the horizontal rotation of the operating end 15B, the contacts of the micro switch 16 are opened and the electromagnets 3A, 3
The supply of excitation power to B from the commercial power supply is cut off.

FIG. 5 is an electrical circuit diagram of the electromagnetic blower 1.
As shown in the electrical circuit diagram, the current supplied from the commercial power source (AC 100V) through the plug 21 connects the micro switch 16 and the electromagnet 3.
The flow flows to the electromagnets 3A, 3B via the automatic return bimetal 22 attached to the electromagnets 3A, 3B.
is excited. As a result, N poles and S poles are alternately generated on the magnetic pole faces of the electromagnets 3A and 3B in accordance with the frequency of the commercial power supply, and the permanent magnets 2
A magnetic attraction force and a magnetic repulsion force are generated between L and 2R, causing the vibrator frame 2 to reciprocate from side to side. Therefore,
In the excitation process, when the above-mentioned eccentric reciprocating movement occurs, the micro-switch 16 is activated;
When the contact of the micro switch 16 is opened, or when the temperature of the coil C2 of the electromagnet 3B becomes higher than the set value and the contact of the automatic return bimetal 22 is opened, the electric circuit is configured so that the current to the coil C2 is cut off. It is configured.

During operation of the electromagnetic blower 1 configured as described above, if the coupling between the center disk CD attached to the vibrator frame 2 and the diaphragm comes off, for example, on the diaphragm chamber 1L side over time or suddenly, vibrations may occur. The center position of the left-right reciprocating movement of the child frame 2 is shifted to the left, and the vibrator striker 12R attached to the lower end surface of the vibrator frame 2 strikes the tip 1 of the arm 15.
5A, the arm 15 is rotated, and the operating end 1
Since 5B operates the micro switch 16,
The contact of the micro switch 16 opens and the electromagnet 3
The excitation current to each of the coils C2 of A and 3B is cut off, and the left and right reciprocating motion of the vibrator frame 2 is stopped. On the other hand, if the coupling between the center disk CD and the diaphragm comes off on the diaphragm chamber 1R side, the center position of the left and right reciprocating motion of the transducer frame 2 is shifted to the right, and the transducer striker 12L is moved to the tip 15A of the arm 15. When they come into contact with each other, the arm 15 is rotated and the micro switch 16 is activated.

(Effects of the invention) As described above, according to the invention, when the connection between the vibrator frame and the diaphragm becomes incomplete over time or suddenly during operation of the electromagnetic blower, the arm detects the eccentric reciprocating motion of the vibrator frame, amplifies the displacement caused by the eccentric reciprocating motion, and operates a switch to quickly cut off the excitation current and eliminate the vibration at the initial stage of the eccentric reciprocating motion. Since the reciprocating movement of the child frame is stopped, it is possible to prevent scattering of iron oxide powder in the electromagnetic blower, destruction of the diaphragm, damage to the pump part and electromagnet, damage to the vibrator frame, etc. Furthermore, unlike the conventional means for breaking printed circuit board pieces, there is no need to replace the parts of the current cutoff means, which facilitates maintenance.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the structure of an embodiment of the present invention, Fig. 2 is a front view showing the structure of an embodiment of the invention, and Fig. 3 includes a partial cross section of the current cutoff means of the embodiment. 4 is a layout diagram of the current cutoff means seen from the bottom of the electromagnetic blower, FIG. 5 is an electric circuit diagram of the embodiment, FIG. 6 is a plan view of a conventional electromagnetic blower, and FIG. 7 is a conventional electromagnetic blower. Front view of the electromagnetic blower, No. 8
The figure is an explanatory diagram showing the configuration of a current cutoff means of a conventional electromagnetic blower. 1... Electromagnetic blower, 2... Vibrator frame, 2L,
2R...Permanent magnet, 3A, 3B...Electromagnet, 12
L, 12R... Vibrator striker, 13... Machine screw, 14... Holder, 15... Arm, 15A
...Tip of arm, 15B... Working end of arm, 16... Micro switch, C1... Core,
C2...Coil.

Claims (1)

[Claims for Utility Model Registration] A vibrator frame is provided with both ends connected to each diaphragm part of the diaphragm chambers provided at symmetrical positions, and the magnetism between the permanent magnet and the permanent magnet attached to the vibrator frame is provided. an electromagnet that reciprocates the vibrator frame by an attractive force and a magnetic repulsion force; An electromagnetic blower is provided with an energization cutoff means for cutting off current from a power source to the electromagnet when eccentric reciprocating motion occurs due to a change in the center position of the reciprocating motion, the blower being electrically connected between the power source and the electromagnet. two convex strikers fixed at symmetrical positions with respect to the center position of the reciprocating motion of the vibrator frame; and an arm that rotates to amplify the displacement when one end comes into contact with one of the two strikers due to displacement of the striker, and the opposite end turns off the micro switch. An electromagnetic blower featuring