JP3358834B2 - Electromagnetic air pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic air pump used, for example, in an aquarium for breeding ornamental fish and a bathtub.

[0002]

2. Description of the Related Art Conventionally, as such an electromagnetic air pump, a pump chamber is formed by connecting a pump membrane to a valve housing having a suction valve and a discharge valve, and the pump membrane is connected to an electromagnetic vibrator driven by an electromagnet. In this case, the air is discharged by changing the volume of the pump chamber by expanding and contracting.

[0003] In such an air pump, the entire pump unit is movably supported by a main body casing, and the pump unit is moved by a screw mechanism to change the distance between the electromagnetic vibrating body and the electromagnet. Is known to be adjustable (Jiko 63-467).
No. 04).

[0004]

By the way, since the pump unit of such an air pump generates vibrations due to the operation of the electromagnetic vibrator, if used for a long period of time, the support of the pump unit will wear out and play will occur. Then, there is a problem that the vibration is amplified by the backlash and noise is generated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and prevents rattling from occurring in a support portion of a pump unit movably supported by a main body casing, thereby reducing noise of an electromagnetic air pump. The purpose is to:

[0006]

In order to achieve the above object, the present invention provides a pump unit for discharging air by the vibration of an electromagnetic vibrating body and an electromagnet for driving the electromagnetic vibrating body inside a main body casing. Store and open the main body casing.
Moveable relative to the mouth end in the longitudinal direction of the casing
A pump unit is attached to the inner peripheral surface of the cylindrical cover
While fitting the outer peripheral surface of the knitting silencer chamber forming cylinder,
A fast screw is formed between the mating surfaces,
An electromagnetic air pump that moves the position of the pump unit in the longitudinal direction of the casing inside the main casing based on the relative rotation of the casing, thereby changing the distance between the electromagnetic vibrator and the electromagnet and adjusting the air discharge rate. In the above, at least the pump unit is provided on the inner end face of the cylindrical portion.
Also supports the valve housing and the pump membrane.
A plate-shaped support section is integrally protruded, and one side is provided on each side edge of the support section.
While a pair of slide projections are provided,
Inside the grayed, the pair of the slide protrusions respectively Keshi
A pair of guide members made of a wear-resistant resin for guiding the slide member in the longitudinal direction thereof so as to be slidable and relatively unrotatable .

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an embodiment of the present invention. FIG. 1 is a view showing a use state of the electromagnetic air pump, FIG. 2 is a longitudinal sectional view thereof, and FIG. 4 is a sectional view taken along line 4-4 in FIG. 2, and FIG. 5 is a sectional view taken along line 5-5 in FIG.
6 is an exploded perspective view of a main part.

As shown in FIG. 1, this electromagnetic air pump P is installed outside a water tank A for breeding ornamental fish and the like, and air is supplied into the water filled in the water tank A via an air hose H. It is used for the purpose of increasing the oxygen concentration in water by supplying and for the purpose of operating the filtration device in the water tank A.

As shown in FIGS. 2 and 3, the air pump P is divided into upper and lower parts at a center split surface, and a pair of upper and lower synthetic resin main body casings 2 and 3 connected by four bolts 1. Prepare. Five anti-vibration rubbers 4 for preventing the vibration of the air pump P from being transmitted to the mounting table or the like of the water tank A are mounted on the bottom surface of the lower main body casing 3. A power cord 6 connected to a household outlet via a grommet 5 extends to the outside from the split surface.

A large number of U-shaped steel plates 7 are laminated inside the lower body casing 3, and the power cord 6
Electromagnet 9 wound with coil 8 supplied with power through
And a pump unit 10 driven by the electromagnet 9 are detachably mounted.

As apparent from FIGS. 4 to 6 together, the pump unit 10 includes a silencing chamber cover 11,
Silencer room 12, base plate 13, valve housing 1
4, comprising a pump membrane 15 and an electromagnetic vibrator 16. The silencing chamber 12 formed of a synthetic resin includes a flat base plate support portion 31 to which the base plate 13 is fixed, and a hollow cylindrical silencing chamber main body 32 fitted inside the silencing chamber cover 11. Thus,
The sound chamber cover 11 includes the cover of the present invention and the base plate.
The rate support portion 31 is provided with the support portion of the present invention and the above-mentioned muffling room.
The main body 32 constitutes a silencing chamber forming tubular portion of the present invention.
ing.

The base plate 13 is a disk-shaped member made of hard rubber, is superposed on a valve housing 14 formed in a cylindrical shape, and is fastened together with the base plate support portion 31 with bolts 17. At this time, the two notches 13 ₁ , 13 ₂ formed on the base plate 13 correspond to the two projections 31 ₁ , 3 formed on the base plate support portion 31.
With fitted to 1 _2, and engage the two holes 13 _3, 13 ₄ in which two protrusions 14 ₁ formed in the valve housing 14, 14 ₂ is formed in the base plate 13 and base plate 13 and the valve housing 14 Is determined.

A hole 32 ₁ formed on the side surface of the silencer chamber main body 32 ₁
The tubular rubber 18 which fits inside the support shaft portion 16 ₁ formed by notching the one end of the metal of the electromagnetic vibrator 16 is fitted from above, is thereby an electromagnetic vibrator 16 thereof supported swingably supported about the shaft portion 16 _1. Further, the permanent magnet 16 ₂ to the other end of the electromagnetic vibrator 16 faces the electromagnet 9 is integrally fixed, the middle part is driven is secured by bolts 19 to the center of the pump membrane 15 You.

Inside the valve housing 14, a suction chamber 20 and a discharge chamber 21 on the base plate 13 side and a pump chamber 22 on the pump membrane 15 side are defined, and between the suction chamber 20 and the pump chamber 22. A suction valve 23 is mounted, and a discharge valve 24 is mounted between the pump chamber 22 and the discharge chamber 21. Then, the suction chamber 20 inside the main body casing 2 through the ports 13 ₅ formed on the base plate 13, i.e. communicates with the atmosphere, the discharge chamber 21 and the port 13 ₆ formed on the base plate 13,
Through a port 31 ₃ and the discharge passage 31 ₄ formed in the base plate supporting portion 31 communicates with the inner space of the silencer chamber body 32.

The suction valve 23 and the discharge valve 24 have the same structure, and the suction valve 23 is fixed to a pin 25 erected on a partition wall of the valve housing 14 by a stopper 26 so that a valve hole 1 is formed.
4 and a rubber valve element 27 which covers openably _3.
Similarly, the discharge valve 24 is fixed to a pin 28 erected on the partition wall of the valve housing 14 by a stopper 29, and the valve hole 14 ₄
Is provided with a rubber-made valve element 30 that can be opened and closed freely. Thus, the suction valve 23 functions as a one-way valve that permits only the flow of air from the suction chamber 20 to the pump chamber 22 and the discharge valve 24 allows only the flow of air from the pump chamber 22 to the discharge chamber 21. I do.

The silencer chamber body 32 downstream end of the discharge passage 31 ₄ formed in the base plate supporting portion 31 is communicated with the
The inside thereof is partitioned by a plurality of sound deadening plates (not shown), and functions to reduce noise due to pulsation of supplied air. The air that has passed through the silencing chamber main body 32 is supplied to the air hose H via a discharge nozzle 33.
The discharge nozzle 34 is formed of a material such as polyethylene, nylon, or polyacetal which is not attacked by a plasticizer contained in an air hose H made of vinyl chloride connected thereto.

A flange 11 is provided at the rear end of the sound deadening chamber cover 11.
₁ is integrally formed, the flange 11 ₁ of the upper body guide groove 3 formed in the end wall of the end wall to form the guide groove of the casing 2 2 ₁ and the lower main body casing 3 ₁
, The muffler chamber cover 11 is rotatably supported.

Meanwhile, silencer chamber 2 of Article thread groove 32 ₂ constituting the early screw on the outer periphery of the main body 32, 32 ₃ are engraved, the silencing chamber cover 1 thereto screw groove 32 _2, 32 ₃
A pair of projections 11 ₂ formed on one of the inner surface, 11 ₃ is fitted, respectively. Therefore, by pinching and rotating the muffling chamber cover 11, the screw grooves 32 are formed in the projections 11 ₂ and 11 _3.
2, 32 ₃ silencer chamber body 32 which is pressed is reciprocally driven in the direction indicated by the arrow a-b in FIGS. In this case, prevention by sliding the O-ring 34 which has an outer peripheral groove 32 ₄ to fit the silencer chamber body 32 to the inner surface of the muffler chamber cover 11, a backlash between the muffler chamber cover 11 and the silencer chamber body 32 However, sound leakage from the main body casings 2 and 3 to the outside can be prevented, and unnecessary rotation of the silencing chamber cover 11 due to vibration can be prevented.

When the muffler chamber main body 32 reciprocates, the base plate support 31 formed integrally with the muffler chamber main body 32 also reciprocates while being guided by the main body casings 2 and 3. That is, the upper edge and each of the lower edge slide protrusions 31 ₅ of the base plate supporting portion 31, 31 and ₆ is formed, the upper side of the slide protrusions 31 ₅ is adhered to the groove formed on the inner surface of the upper main body casing 2 guides It is slidably guided by the member 35 and the lower slide projection 31.
₆ is slidably guided by a guide member 36 bonded to a groove formed on the inner surface of the lower main body casing 3. The guide members 35 and 36 are formed of a synthetic resin such as nylon having abrasion resistance and small sliding resistance in a U-shaped cross section, and the slide protrusions 31 ₅ and slidably fitted therein are provided. backlash due to wear is prevented from occurring between the and 31 _6.

Next, the operation of the embodiment of the present invention having the above configuration will be described.

The _second permanent magnets 16 corresponding to the AC frequency of the household power source is energized the electromagnet 9 is sucked into the left and right alternately electromagnetic vibrator 16 is vibrated around the shaft portion 16 _1,
The pump membrane 15 connected to the intermediate portion expands and contracts. When the pump membrane 15 to expand the volume of the pump chamber 22 expands, the valve body 30 closes the valve hole 14 ₄ of the discharge valve 24, the valve body 27 of the suction valve 23 opens the valve hole 14 _3, the main body casing 2 , air in the 3-port 13 ₅ formed on the base plate 13, and is sucked into the pump chamber 22 through the suction chamber 20 and the suction valve 23. Continuing the pump membrane 15 to contract, now discharge valve 24 is opened together with the intake valve 23 closes, the air in the pump chamber 22 is a discharge valve 24, discharge chamber 21, port 13 ₆ and the base plate supporting portion formed on the base plate 13 The pressure is fed to a discharge passage 31 ₄ through a port 31 ₃ formed in the base 31. Pumped to the discharge passage 31 ₄ air is muffling chamber body 3
2 and is muffled, from which it is supplied to the air hose H via the discharge nozzle 33.

[0023] Now, when rotated by pulling the silencer chamber cover 11 to adjust the discharge amount of the air pump P, which is pressed thread groove 32 _2, 32 ₃ the projection 11 _2, 11 ₃ formed on the inner surface thereof muted The chamber main body 32 is pushed and pulled. As a result, is guided silencer chamber body 32 to the inner surface of the muffler chamber cover 11, and a pair of upper and lower sliding protrusion 31 ₅ of the base plate supporting portion 31, 31 ₆ guided by the guide members 35 and 36 provided in the main body casing 2, 3 Then, the sound deadening room 12 is
And move in the direction of arrow a or b in FIG. For example, a silencing chamber cover 11 is rotated clockwise, silencing chamber 12 is reduced gap α between the permanent magnet 16 ₂ and the electromagnet 9 to move in the direction of arrow a. As a result, the electromagnetic force applied to the electromagnetic vibrating body 16 from the electromagnet 9 increases, and the electromagnetic vibrating body 16
And the discharge amount of the air pump P increases. Conversely, when the muffler chamber cover 11 is rotated counterclockwise, the muffler chamber 12 moves in the direction of arrow b and the permanent magnet 16 ₂
The gap α between the magnet and the electromagnet 9 increases. As a result, the electromagnetic force that the electromagnetic vibrator 16 receives from the electromagnet 9 decreases, the amplitude of the electromagnetic vibrator 16 decreases, and the discharge amount of the air pump P decreases.

Electromagnetic vibrator 1 accompanying operation of air pump P
The vibration of 6 is transmitted to the pump unit 10, the pump unit 10, the slide protrusions 31 _5, 31 ₆ of the base plate supporting portion 31 is fitted into the synthetic resin guide member 35, 36 such as nylon support because it is a long period of time also is not the slide protrusions 31 _5, 31 ₆ and the guide member 35, 36 is worn in use. As a result, the pump unit 10 is always supported by the main body casings 2 and 3 without play, thereby preventing generation of noise and allowing the air pump P to operate quietly. In addition, since the guide members 35 and 36 have small sliding resistance, the pump unit 10 can slide smoothly when adjusting the discharge amount.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made.

For example, the air pump according to the present invention is not limited to an aquarium fish tank, but can be applied to an air pump for supplying air bubbles into a bathtub.

[0027]

As described above, according to the present invention, the pump unit
Open end of main body casing in which knit and electromagnet are stored
Rotation relative to the part and immovable in the longitudinal direction of the casing
Pump unit on the inner peripheral surface of the cylindrical cover
And fitting the outer peripheral surface of the
Fast screws are formed between the mating surfaces, and the
The position of the pump unit is determined based on the counter rotation.
By moving the casing in the longitudinal direction inside the
Change the distance between the electromagnetic vibrator and the electromagnet to discharge air
In the electromagnetic air pump that can adjust the
At least the pump unit has an inner end face
Flat plate supporting lube housing and pump membrane
And a pair of support parts protruding integrally on both sides of the support part.
While the slide projections are provided respectively,
Inside, the pair of slide projections
Abrasion resistant to guide slidably in the longitudinal direction and non-rotatable
Since a pair of guide members made of wearable resin are provided,
The wear-resistant resin guide member that guides the slide projections
Fitting portion between the cover and the cover
At a more distant position (and therefore
Stable support of pump unit by securing support span)
When the cover is rotated, the cylinder (
The rotation of the pump unit can be reliably regulated,
As a result, not only can the position of the pump unit be changed smoothly and accurately when adjusting the air discharge amount, but also the backlash of the pump unit support is caused by the vibration generated by the operation of the electromagnetic vibrator. This can contribute to quiet operation of the air pump. Also
The above-mentioned flat support is used for the main parts (bath) of the pump unit.
Lube housing and pump membrane)
And means, and the moving guide means against the pump unit, the same Yu
Because it also serves as a detent means for the knit, that's it
The structure of the device has been simplified, and cost reduction and ease of assembly work have been achieved.
It can contribute to improvement.

[Brief description of the drawings]

FIG. 1 is a diagram showing a use state of an electromagnetic air pump.

FIG. 2 is a longitudinal sectional view of an electromagnetic air pump.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 2;

FIG. 5 is a sectional view taken along line 5-5 in FIG. 3;

FIG. 6 is an exploded perspective view of a main part.

[Explanation of symbols]

2 Body Casing 3 Body Casing 9 Electromagnet 10 Pump Unit 11 Silence Chamber Cover (Cover) 14 Valve Housing 15 Pump Membrane 16 Electromagnetic Oscillator 31 Base Plate Support (Support) 31 ₅ Slide Projection 31 ₆ Slide Projection 32 Silence Room Main Body (Mute) (Cylinder for chamber formation) 35 Guide member 36 Guide member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A01K 63/04 F04B 43/00-47/14 F04B 53/00-53/22

Claims (1)

(57) [Claims] 1. A pump unit (10) for discharging air by the vibration of an electromagnetic vibrator (16) and an electromagnet (9) for driving the electromagnetic vibrator (16) inside a main body casing (2, 3). And open the main casing (2, 3).
Moveable relative to the mouth end in the longitudinal direction of the casing
On the inner peripheral surface of the cylindrical cover (11)
Of the silencing chamber forming tubular portion (32) of the pump unit (10)
Fitting the outer peripheral surface and forming a fast screw between the fitting surfaces
Relative rotation between the cover (11) and the cylindrical portion (32).
The distance between the electromagnetic vibrator (16) and the electromagnet (9) is changed by moving the position of the pump unit (10) in the longitudinal direction of the casing inside the main body casings (2, 3) based on In the electromagnetic air pump whose volume can be adjusted , a pump unit (1) is provided on the inner end face of the cylindrical portion (32).
0) at least valve housing (14) and pump
Flat support (31) for supporting the membrane (15)
And a pair of slide projections (31 ₅ , 31 ₆ ) provided on both side edges of the support portion (31).
Write, inside the main casing (2, 3), the pair of the scan <br/> slide projection (31 _5, 31 ₆₎ casing length, respectively
A pair of guide members (35, 36) made of a wear-resistant resin are provided to guide in a slidable manner in the hand direction and to prevent relative rotation.
An electromagnetic air pump.