JPH0717973U - Small air pump valve device - Google Patents

Abstract

(57) [Abstract] [Purpose] The valve device of a small air pump is an umbrella-shaped one with a circle as its main component, which is easy to install, does not cause misalignment in positioning, does not easily generate noise, and is Also make the mold and product unit price low. [Structure] A plurality of vent holes and support leg insertion holes are formed in the upper wall of the compartment of the air housing, and a seat portion and a circular convex rib of the circular valve body are provided, and the circular valve is inserted in the support leg insertion hole. Inserting and fixing the support leg of the main body to bring the outer peripheral edge of the thin-film valve into contact with the circular convex rib to ensure the valve action, while lowering the R gradually from the convex portion of the circular valve main body toward the thin-film valve. It is characterized in that a plurality of taper ribs are formed integrally with each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a valve device of a small air pump used in an aquarium for breeding tropical fish such as tropical fish, and more particularly to a structure of an air housing and a valve for sending air.

[0002]

[Prior art]

 Conventionally, generally used small air pumps are those in which a diaphragm is vibrated by a vibrating coil and a magnet to pressurize air and introduce it into a water tank to cause it to foam.Therefore, various valve devices have been devised. However, the applicant has also previously reported that a valve having a rubber tongue-shaped valve element protruding from the one-sided support portion having one supporting leg is disclosed in Japanese Utility Model Publication No. 55-24445 and a rubber-made thin plate valve plate. A valve, which is provided with continuous support pieces on both sides and support legs on both support portions, is proposed in Japanese Utility Model Publication No. 55-24443.

[0003]

[Problems to be solved by the device]

 In the former one of those described in the prior art, when inserting the support leg into the small hole for support, there is one direction because there is one support leg, and as a result, when mounting the support leg, the valve plate is biased to the left and right. However, there was a problem that the set position varied depending on the position.

Further, during operation over a long period of time, there is a possibility that the valve plate may rotate to cause a trouble such as air leakage.

The latter has the advantage that the valve plate position is completely fixed, but it requires time for installation work due to the two support legs, and the structure is complicated, so the cost of the die and product increases, etc. There was a problem.

Further, as a result of mass production use, there is a problem that the noise of the pump generated by the valve operation during use becomes loud.

The present invention has been made in order to solve the above-mentioned problems of the prior art. The purpose of the present invention is simple because the shape of the valve body is mainly a circle. The purpose of the present invention is to provide a valve device for a small air pump that is easy to install, does not cause misalignment, does not easily generate noise, and can reduce the unit cost of the valve itself and the die manufacturing cost.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, a valve device for a small air pump according to the present invention is provided with a plurality of vent holes and a support leg insertion hole of a circular valve body through an upper wall of a compartment of an air housing. The seating part of the valve body, the circular convex rib, and the non-contact concave part, and the circular convex part made of rubber or synthetic resin has the convex part on the top surface, the thin film valve, and the R-shaped part connected integrally with them. It has taper ribs, support legs and guide legs, and these are installed in the air intake and exhaust chambers of the air housing.

[0009]

[Action]

 Insert the guide legs of the circular valve body into the support leg insertion holes provided in the upper wall of the compartment of the air housing, and pull the support legs by pulling from the opposite side to set the circular valve body easily and accurately. Can be done.

Since the circular valve bodies are attached to the intake chamber and the exhaust chamber, respectively, the diaphragm vibrates due to the energization as described above, and the circular valve bodies are alternately displaced and interlocked with it to function as a pump. To do.

The circular valve body contacts the seating portion at the peripheral edge of the support leg with the upper wall of the compartment, and the outer peripheral edge of the thin film valve only abuts on the circular protruding rib. Since the area is small, it does not generate much noise.

Further, since a plurality of ridged taper ribs with R are provided between the convex portion of the circular valve body and the thin film valve, deformation of the thin film valve itself can be prevented and the thin film valve can be surely secured for a long period of time. Work.

[0013]

【Example】

 Examples will be described in detail with reference to the drawings. In FIG. 1, the pump body (10) is made of a vibrating coil (11), a magnet (13) attached to the stay (12) facing it, rubber connected to the stay (12), a synthetic resin, etc. The diaphragm (14) is fitted in the air housing (20) and is attached to the pump body (10) with screws or the like via the packing (15). When (16) is connected to a household power source by a cord, the alternating magnetic field from the vibrating coil (11) acts on the magnet (13) to vibrate the diaphragm (14) and the air housing (20) as described later. By the action of the circular valve body (30), compressed air is sent out from the discharge port (17).

In FIG. 1, the air housing (20) is made of synthetic resin and has a substantially cylindrical shape. The upper wall (21) of the compartment that divides the cylindrical portion into upper and lower parts, and further immediately below the wall (21). The partition wall is partitioned by the intermediate wall (22) on the packing (15) side to form an intake chamber (23) and an exhaust chamber (24), respectively. The intake chamber (23) has an intake port (18) and an exhaust chamber (24). ) Is provided with a discharge port (17).

In FIG. 1, the upper wall (21) of the compartment has a circular shape through which a supporting leg of a circular valve body (30) described later that vertically penetrates the walls of the intake chamber (23) and the exhaust chamber (24) is inserted. The support leg insertion hole (25) and a plurality of ventilation holes (26) vertically penetrating the wall are also provided around the support leg insertion hole (25).

Further, on the upper wall (21) of the compartment, the seat portion (27) of the circular valve body (30) and the thin-film valve of the circular valve body (30) are provided around the support leg insertion hole (25). A circular convex rib (28) is provided as a ring-shaped wall that is in contact with the outer peripheral edge of (31) and is at the same height as the seating portion (27). It is a recess (29).

2 and 3, the circular valve body (30) is formed by molding rubber or synthetic resin, so that the overall shape is substantially umbrella-shaped, and the thin-film valve (31) is used as a boundary. A plurality of protrusions (32) serving as a base portion and a plurality of tapered ribs (33) gradually decreasing with R toward the tip are integrally formed. Then, on the lower surface of the thin film valve (31), a convex portion (32), a concentric support leg (34), and a guide leg (35) having a diameter smaller than that of the support leg (34) in the extension direction are integrally formed. Has been formed. In addition, a lightening hole (36) is formed from the upper surface of the convex portion (32) to the lower side of the support leg (34) and continues to the central portion.

The outer diameter of the support leg (34) is made slightly thicker than the hole diameter of the support leg insertion hole (25), and the length of the fork support leg portion (34) is the thickness 1 of the upper wall (21) of the compartment. Is made longer than.

The circular valve body (30) is attached to the air housing (20) by providing the guide legs (35) in the intake chamber (23) and the exhaust chamber (24) of the upper wall (21) of the compartment. Then, the thin film valves (31) are inserted into the supporting leg insertion holes (25) from the seating portion (27) side, and pulled until the thin film valves (31) come into contact with the seating portion (27).

The air housing (20) is attached to the pump body (1) with screws through the packing (15), and the diaphragm (14), the stay (12) and the magnet (13) are set, and the vibrating coil is installed. (11) Attach necessary parts in sequence.

[0021]

Since the present invention is configured as described above, it has the following effects.

When mounting the circular valve body, since there is no direction for mounting, the guide leg can be inserted into the support leg insertion opening of the upper wall of the compartment and pulled in the opposite side. Easy and reliable installation without the need for skill.

The portion where the circular valve main body contacts the upper wall of the compartment is only the seating portion and the circular convex rib. In operation, unlike the prior art, in the case of line contact, since it is a line contact state, there is less operating noise. No discomfort to the user.

Since the circular valve body is provided with a plurality of ridged taper ribs with R, it does not give a great resistance to the operation of the thin film valve, but it prevents deformation of the thin film valve and ensures reliable operation for a long period of time. Enable operation.

Since the support leg portion of the circular valve body is provided with a lightening hole at the center, when it is attached to the support leg insertion hole, the fitting may become a sickle and come out during long-term use. Can be prevented.

Since the overall shape of the circular valve body is mainly based on a circle, the die manufacturing cost is low.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of a pump body, showing a main part in a cross section.

FIG. 2 is an enlarged side view of the mounted state of the circular valve body, showing the left half in cross section.

FIG. 3 is a plan view of a circular valve body.

FIG. 4 is a perspective view in the process of attaching the circular valve body and the upper wall of the compartment.

[Explanation of symbols]

 10 Pump Main Body 11 Vibration Coil 12 Stay 13 Magnet 14 Diaphragm 20 Air Housing 21 Upper Chamber Wall 25 Support Leg Insertion Hole 26 Vent Hole 27 Seating Part 28 Circular Convex Rib 29 Non-Abutting Concave 30 Circular Valve Main Body 31 Thin Film Valve 32 Convex portion 33 Tapered rib 34 Support leg 35 Guide leg 36 Lightening hole

Claims (1)

[Scope of utility model registration request] 1. A small air pump in which a diaphragm (14) fitted to an air housing (20) is vibrated by a vibrating coil (11) and a magnet (13). The intake chamber (23) by the chamber middle wall (22) and the compartment upper wall (21)
And an exhaust chamber (24), and a plurality of vent holes (2) penetrating through the upper walls (21) of the compartments of the two chambers.
6) and the support leg insertion hole (25) of the circular valve body (30),
The seat (27) of the circular valve body (30) and the thin film valve (3)
1) A circular convex rib (28) that abuts the outer peripheral edge, and a non-abutting concave portion (2) between the rib (28) and the seating portion (27).
9) to form a circular valve body (3) made of rubber or synthetic resin.
0), a convex portion (32) serving as a base portion, a circular thin film valve (31) around the convex portion (32), and a plurality of taper ribs (33) which become gradually lower with R from the upper surface of the convex portion (32) toward the tip. The upper surface wall (21) of the compartment on the back side of the thin film valve of the ridge (32)
Of the supporting leg (34) longer than the thickness 1 of the supporting leg (3)
4) A guide leg (3) having a diameter smaller than that of the support leg (34) is attached to the tip of (4).
5) and a lightening hole (36) continuous from the upper surface of the convex portion (32) to the lower side of the support leg (34) in the center, and the support leg (34) is larger than the hole diameter of the support leg insertion hole (25). The circular valve body (30) is formed so that the outer diameter of
A valve device for a small air pump in which a support leg (34) of a circular valve body (30) is inserted and attached to a support leg insertion hole (25).