JP3391585B2 - Air pump check valve - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve for an air pump. 2. Description of the Related Art Conventionally, in general households and places where a large number of people gather, it has been practiced to breed appreciation fish in an aquarium and to enjoy them with indoor accessories or the like. . In a tank for breeding such appreciation fish, it is often found that a foam generator is placed on the bottom of the water, and air is sent from the small air pump to the foam generator to generate air bubbles. FIG. 5 shows a conventional example of an air pump and a check valve thereof used in this kind of foam generating apparatus. FIG.
In the figure, 51 is an air pump, which has an electromagnetic drive mechanism, an arm, a diaphragm, etc., swings the arm by the electromagnetic action of the electromagnetic drive mechanism, sucks air into the diaphragm by swinging the arm, and Air outlet 5
It is structured to discharge from 11. 52 is a hose, and 521 is a first hose of the hose.
1 air outlet 511. Reference numeral 522 denotes the second hose, the tip end of which is connected to a foam generating device (not shown). A check valve 53 includes a tubular connecting member 54 and a tubular valve member 55 mounted in the connecting member 54. A connecting member 54 has a second hose 52 at one end.
A cylindrical portion 543 having a connection port 541 with the second portion 542 and an opening 542 at the other end, and a first hose 52 connected to the other end opening 542 of the cylindrical portion 543 and the other end outside the cylindrical portion 543.
A connection pipe 546 that forms a connection port 544 with the valve member 55 and a cylindrical connection port 545 for connecting the valve member 55 to the inside thereof.
The air passage 54 is provided between the two connection ports 541 and 544.
7 is defined. The outer diameter of the cylindrical portion 543 is larger than that of the hose 52, and both connection ports 54 with the hose 52 are provided.
The outer diameter of 1,544 is almost the same as or slightly larger than the inner diameter of the hose 52. As a result, the check valve 53 is airtightly connected between the first hose 521 and the second hose 522. The outer diameter of the connection port 545 with the valve member 55 is smaller than the inner diameter of the cylindrical portion 543, and is set to be substantially the same as or slightly larger than the inner diameter of an air inlet 551 of the valve member 55 described later. Thereby, the valve member 55 can be airtightly attached to the connection port 545 of the connection member 54. As shown in FIG. 6, the valve member 55 has an air inlet 551 at one end made of an elastic material such as natural rubber or silicon rubber, and has a single-letter shape tapered outward at the other end. It has a closed opening / closing port 552 and is formed in a tubular shape as a whole. The valve member 55 having such a shape is assembled by press-fitting the connection port 545 of the connection pipe 546 into the air inlet 551, and by joining the connection pipe 546 to the cylindrical section 543. Air-tightly mounted on the air flow path 547. Next, the thus assembled air
The operation of the check valve 53 of the pump 51 will be described with reference to FIG. In FIG. 5, the air discharged from the air outlet 511 of the air pump 51 is sent out through the connected first hose 521, and the reverse air connected between the first hose 521 and the second hose 522. It passes through the stop valve 53. That is, air is sent from the connection port 544 to the first hose 521 into the connection member 54, flows into the valve member 55 on the air flow path 547 from the inflow port 551, and the valve member 55 The fluid flows out while pushing open the opening / closing port 552, and is sent out from the connecting port 541 of the connecting member 54 to the second hose 522. Then, the water is sent from the second hose 522 to a water tank (not shown). [0008] Here, when a backflow of air occurs from the water tank side, the air flowing back through the second hose 522 is blocked by the check valve 53. That is, the backflow air once enters the connection member 54 of the check valve 53 through the connection port 541 thereof, but closes in a one-letter shape in the direction in which the opening / closing port 552 of the valve member 55 in the connection member 54 sends out the air. Therefore, the backflow air is
52 cannot be opened and its flow is interrupted here. As described above, the check valve 5 of the air pump 51
By using 3, it is possible to prevent water from flowing into the air pump 51 from the water tank by blocking the reverse flow of air from the water tank side, and it is possible to protect the air pump 51 from water. . However, the check valve of the above-mentioned conventional air pump has a structure in which the opening / closing opening of the valve member is tapered and closed in the direction of sending out air. Therefore, when the air is strongly sent to increase the discharge amount, there is a problem that both sides of the opening and closing opening of the valve member vibrate to generate a whistling beep. If such noise does not stop at night in a general household, it is harsh and may disturb sleep. In addition, since bubbles originally form bubbles in the water tank, people should hear the sound of bubbles rising in the water or the clear sound of bubbles popping out of the water and popping out. Sound was drowned out by the noise of the air pump and could not be heard. [0011] Further, in the shape of the opening and closing port of the conventional valve member,
Actually, when a backflow of air occurs, the pressure sometimes presses both sides of the opening / closing opening to open the opening / closing opening, and there is also a problem that the backflow air cannot be completely blocked. SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. The present invention is directed to an air pump capable of preventing the generation of noise and improving the valve function to completely shut off the backflow of air. It is intended to provide a check valve. [0013] In order to achieve the above object, the present invention provides a tubular connection having a connection port at both ends capable of airtightly connecting a hose and defining an air flow path. and the member is mounted in an airtight air flow path in the connecting member, and a valve member for regulating the flow of air, the valve member has an inlet of the air at one end, sending the air to the other end has a structure tapered toward the direction, a valve body off opening is formed which is substantially closed to the one-letter shaped in its leading edge, substantially perpendicular direction with respect to one <br/> character direction off opening of the valve body And the leading edge of the valve
Formed on both sides of the valve body in a manner that forms a cross, and a reinforcing rib REDUCE both sides of the valve body <br/> closure closing direction, reinforcing the valve body
Surrounds the use ribs, have a, a cylindrical outer wall supporting the reinforcing ribs, the reinforcing ribs, the opposite side portions of the joint portion of the valve body
Are made of a tubular body made of an elastic material and integrated with the outer wall . Therefore, according to the present invention , the valve body of the valve member
The substantially perpendicular direction with respect to one character direction of closure, of the valve body
Reinforcement ribs are provided on both sides of the valve body in a cross shape with the tip edge, and further surround the valve body and reinforcement ribs, and
By providing a cylindrical outer wall to support and suppressing both sides of the valve body in the direction to close the opening and closing, even if the air discharge amount is increased, vibration on both sides of the opening and closing of the valve member is suppressed, it is possible to prevent the generation of noise, and if the backflow of air occurs, closure is found pressing the reinforcing rib
Is also because the reinforcing ribs are firmly shut the character type is supported on the outer wall, can be blocked completely the backflow air. FIG. 1 shows the structure of a check valve of an air pump according to a first embodiment of the present invention. In FIG.
Numeral 11 denotes an air pump similar to the conventional one, which has an electromagnetic drive mechanism, an arm, a diaphragm, etc., swings the arm by the electromagnetic action of the electromagnetic drive mechanism, and sucks air into the diaphragm by the swing of the arm. The tip air outlet 1
It is structured to discharge from 11. 12 is a hose, 121 is the first hose, and the air pump 1
1 air outlet 111. Reference numeral 122 denotes a second hose having a distal end connected to a foam generating device (not shown). A check valve 13 includes a tubular connecting member 14 and a tubular valve member 15 mounted in the connecting member 14. The connecting member 14 includes a cylindrical portion 141 and a connecting pipe 14.
Consists of two. As shown in FIG. 2, the cylindrical portion 141 has a connection port 143 for connecting to the second hose 122 at one end and an opening 144 at the other end. The connection pipe 142 has a first end on one end side.
A connection port 145 for connecting the valve member 15 to the other end side.
45 and the connection port 146, the opening 144 of the cylindrical portion 141.
Is provided. Further cylindrical part 1
41 has a groove-shaped step portion 148 over the entire inner peripheral edge of the opening 144, while the flange portion 147 of the connection pipe 142 has a fitting portion 149 having substantially the same diameter as the opening 144 of the cylindrical portion 141, and an outer diameter of the cylindrical portion 141. And a contact portion 150 with the end surface of the opening 144 having substantially the same diameter as that of the step 144. Therefore,
The connecting tube 142 is inserted into the opening 144 of the cylindrical portion 141 with the side of the connecting port 146 inserted into the contact portion 1 of the flange portion 147.
The fitting is performed by press-fitting the fitting portion 149 until the 50 hits the end face of the opening 144. Thus, the cylindrical portion 14
1 and the connection pipe 142 are assembled to form the connection member 14, and the air passage 16 is defined between the connection ports 143 and 145. The outer diameter of the cylindrical portion 141 is larger than that of the hose 12, and both connecting ports 143, 1
The outer diameter of 45 is set to be substantially the same as or slightly larger than the inner diameter of the hose 12, and the check valve 13 is hermetically connected between the first hose 121 and the second hose 122. The outer diameter of the connection port 146 with the valve member 15 is smaller than the inner diameter of the cylindrical portion 141, and is set to be substantially the same as or slightly larger than the inner diameter of an air inlet 151 of the valve member 15 described later. Can be hermetically attached to the connection port 146 of the connecting member 14. As shown in FIG. 3, the valve member 15 is made of an elastic material such as natural rubber or silicon rubber and has an air inlet 151 at one end and an opening 152 at the other end. It is formed in a substantially cylindrical shape. And
A flange 153 is provided on the peripheral edge of the inflow port 151 at one end thereof, and a valve body 154 is provided at a portion extending from an intermediate portion between the inflow port 151 and the opening 152 at the other end to the opening 152, and a cylindrical outer wall 155 is provided. And are integrally formed.
The valve body 154 has a basic structure in which the inside is hollow and has a substantially wedge-like shape which is gradually tapered and sharpened from the upstream side to the downstream side of the valve member 15. At the same position, it extends in the diameter direction of the opening 152. In addition, a slit-shaped opening / closing opening 156 formed in a character shape in a direction in which the edge extends, that is, in a diametrical direction, is provided at a leading edge of the valve body 154. On both sides of the opening / closing port 156 of the valve element 154, the valve element 154 faces substantially perpendicularly to the one-character opening / closing port 156.
, And a reinforcing rib 157 that reinforces the opening and closing port 156 in the closing direction. In this embodiment, the reinforcing ribs 157 are provided on both sides of the opening / closing port 156 of the valve element 154 at a position substantially at the center of the opening / closing port 156 in the longitudinal direction. Therefore, the opening 152
Inside, the opening / closing opening 156 and the reinforcing rib 157 are integrated with the outer wall 155 so as to be surrounded by the outer wall 155 in a cross shape in a plan view. Is closed by a single letter. Further, the reinforcing rib 157 has a structure that is supported by the outer wall 155 by integrating the portion opposite to the joint with the valve body 154 with the outer wall 155. As shown in FIG. 2, the valve member 15 having such a shape is assembled by press-fitting the connection port 146 of the connection pipe 142 into the inflow port 151 thereof. By being joined to the portion 141, it is airtightly mounted on the air flow path 16 in the cylindrical portion 141. When the connecting pipe 142 is joined to the cylindrical part 141, the flange part 153 of the valve member 15 is sandwiched between the step part 148 of the cylindrical part 141 and the flange part 147 of the connecting pipe 142, and the valve member 15 is fixed. Is given. Next, the assembled air
The operation of the check valve 13 of the pump 11 will be described with reference to FIG. In FIG. 1, air discharged from an air outlet 111 of an air pump 11 is sent out through a connected first hose 121, and the first hose 1
Check valve 1 connected between the first hose 21 and the second hose 122
Pass 3 That is, the air is supplied to the first hose 121.
From the connection port 145 into the connection member 14, flows into the valve member 15 on the air flow path 16 from the inflow port 151, and is opened and closed by the pressure of air.
6 open and push out, the connection port 14 of the connection member 14
3 to the second hose 122. At this time,
The opening / closing opening 156 of the valve member 15 is pushed and opened by the pressure of air, while the opening / closing opening 156 is reinforced in a direction in which the opening / closing opening 156 is closed by reinforcing ribs 157 on both sides thereof, so that even if the discharge amount of air is increased , Opening and closing port 15 of valve member 15
Vibration on both sides of 6 is suppressed, and the generation of an unpleasant sound such as a beep is prevented. Here, when a backflow of air occurs from the water tank side, the air flowing back through the second hose 122 is blocked by the check valve 13. That is, the backflow air once enters the connection member 14 of the check valve 13 through the connection port 143, but forms a one-character taper in the direction in which the opening / closing port 156 of the valve member 15 in the connection member 14 sends out air. It is closed and this is the reinforcing ribs 15 on both sides.
7, the opening / closing of the opening / closing port 156 by the backflow air is restricted, and the flow is blocked here. That is, the water from the water tank is prevented from flowing into the air pump 11. As described above, according to the first embodiment, the reinforcing ribs 157 are provided around the opening / closing opening 156 of the valve member 15 substantially at right angles to the one-letter opening / closing opening 156, and the opening / closing opening 156 is formed. Since the reinforcing member is reinforced in the closing direction, the opening and closing port 15
The vibration on both sides of the opening 6 is suppressed to prevent the generation of noise.
Since 56 is tightly closed in a one-letter shape by the pressing of the reinforcing ribs 157, the air flowing back can be blocked. FIG. 4 shows the configuration of a valve member of a check valve according to a second embodiment of the present invention. In this embodiment, the valve member 21 is formed into a substantially tubular shape as a whole by an elastic material such as natural rubber or silicone rubber, has an air inlet 211 at one end, and has a flange portion 212 at a peripheral portion thereof. The other end forms a valve element 214 having an opening / closing opening 213 that is closed in a character shape tapering outward.
Reinforcing ribs 21 formed on both sides of opening / closing opening 213 at right angles to the one-letter shape to reinforce opening / closing opening 213 in a closing direction.
5 is provided. The valve body 2 of the valve member 21
14 is a valve body 15 of the valve member 15 in the first embodiment.
4 is different from that in FIG. 4 in that the valve element 214 is not surrounded by the outer wall but appears as a part of the outer shape of the valve member 21. The valve member 21 may be configured as described above.
By installing the valve member 15 in the connecting member 14 shown in the first embodiment in place of the valve member 15, the opening / closing port 213 is reinforced in the closing direction as in the first embodiment, and the air discharge amount 213 of the valve member 21 even if
The vibrations on both sides of the opening are suppressed, and the generation of noise can be prevented.
3 is tightly closed in a one-letter shape, so that backflow air can be completely blocked. [0025] As described above, according to the present invention, the valve member in a direction substantially perpendicular to relative one character direction <br/> off opening of the valve body, the valve body of the above
Reinforcing ribs on both sides of the valve body in a manner that forms an end edge and cross
Formed , further encircling the valve body and the reinforcing ribs, reinforcing ribs
The outer wall of the cylinder that supports the valve is formed, and both sides of the valve body are suppressed in the direction to close the opening, so even if the discharge amount of air is increased, vibration on both sides of the opening and closing of the valve member is suppressed, Ki de is possible to prevent generation of noise, also even if the backflow of air occurs, closure is pressed on the reinforcing rib, also
Since the reinforcing rib is supported by the outer wall, the opening / closing opening is tightly closed in a single-letter shape, so that the backflowing air can be completely blocked, and the valve function can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a check valve of an air pump according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the check valve. FIG. 4 is a perspective view of a valve member of a check valve according to a second embodiment of the present invention. FIG. 5 is a side view of a check valve of a conventional air pump. FIG. 11 Air pump 111 Air outlet 12 Hose 121 First hose 122 Second hose 13 Check valve 14 Connection member 141 Cylindrical part 142 Connection pipe 143 Connection port 144 Opening 145 Connection port 146 Connection port 147 Flange section 148 Step section 149 Fitting section 150 Contact section 15 Valve member 151 Air inlet 152 Opening 153 Flange section 154 Valve body 155 Outer wall 156 Opening / closing opening 157 Reinforcing rib 21 Valve member 211 air Inlet 212 flange 213 Closure 214 valve body 215 reinforcing ribs 16 air channel

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16K 15/00-15/20 F04B 45/04 F04B 53/10

Claims (1)

(57) [Claim 1] An air pump which is connected to a hose connected to an air pump and sends out air discharged from the air pump in one direction to prevent backflow. In the check valve, a tubular connection member having a connection port capable of airtightly connecting the hose at both ends, and a tubular connection member having an air flow path defined therein; air-tightly mounted on the air flow path in the connection member; of a valve member for regulating the flow, the valve member has an air inlet at one end, has a structure tapered in a direction to feed the air to the other end,
A valve body off opening is formed which is substantially closed to the one-letter shaped in its leading edge, with respect to one character direction of closure of the valve body
In a direction substantially perpendicular to the leading edge of the valve body.
Formed on both sides of the valve body to form a reinforcing rib on both sides of the valve body REDUCE pre <br/> Symbol closure closing direction, the valve body
And a cylinder that surrounds the reinforcing rib and supports the reinforcing rib
Possess the shape of the outer wall, a, of the reinforcing ribs, part of the opposite side of the joint portion between the valve body
A non- return valve for an air pump, wherein the non-return valve is constituted by a tubular body made of an elastic material and integrated with the outer wall .